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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/drivers/block/floppy.c | |
3 | * | |
4 | * Copyright (C) 1991, 1992 Linus Torvalds | |
5 | * Copyright (C) 1993, 1994 Alain Knaff | |
6 | * Copyright (C) 1998 Alan Cox | |
7 | */ | |
06f748c4 | 8 | |
1da177e4 LT |
9 | /* |
10 | * 02.12.91 - Changed to static variables to indicate need for reset | |
11 | * and recalibrate. This makes some things easier (output_byte reset | |
12 | * checking etc), and means less interrupt jumping in case of errors, | |
13 | * so the code is hopefully easier to understand. | |
14 | */ | |
15 | ||
16 | /* | |
17 | * This file is certainly a mess. I've tried my best to get it working, | |
18 | * but I don't like programming floppies, and I have only one anyway. | |
19 | * Urgel. I should check for more errors, and do more graceful error | |
20 | * recovery. Seems there are problems with several drives. I've tried to | |
21 | * correct them. No promises. | |
22 | */ | |
23 | ||
24 | /* | |
25 | * As with hd.c, all routines within this file can (and will) be called | |
26 | * by interrupts, so extreme caution is needed. A hardware interrupt | |
27 | * handler may not sleep, or a kernel panic will happen. Thus I cannot | |
28 | * call "floppy-on" directly, but have to set a special timer interrupt | |
29 | * etc. | |
30 | */ | |
31 | ||
32 | /* | |
33 | * 28.02.92 - made track-buffering routines, based on the routines written | |
34 | * by entropy@wintermute.wpi.edu (Lawrence Foard). Linus. | |
35 | */ | |
36 | ||
37 | /* | |
38 | * Automatic floppy-detection and formatting written by Werner Almesberger | |
39 | * (almesber@nessie.cs.id.ethz.ch), who also corrected some problems with | |
40 | * the floppy-change signal detection. | |
41 | */ | |
42 | ||
43 | /* | |
44 | * 1992/7/22 -- Hennus Bergman: Added better error reporting, fixed | |
45 | * FDC data overrun bug, added some preliminary stuff for vertical | |
46 | * recording support. | |
47 | * | |
48 | * 1992/9/17: Added DMA allocation & DMA functions. -- hhb. | |
49 | * | |
50 | * TODO: Errors are still not counted properly. | |
51 | */ | |
52 | ||
53 | /* 1992/9/20 | |
54 | * Modifications for ``Sector Shifting'' by Rob Hooft (hooft@chem.ruu.nl) | |
55 | * modeled after the freeware MS-DOS program fdformat/88 V1.8 by | |
56 | * Christoph H. Hochst\"atter. | |
57 | * I have fixed the shift values to the ones I always use. Maybe a new | |
58 | * ioctl() should be created to be able to modify them. | |
59 | * There is a bug in the driver that makes it impossible to format a | |
60 | * floppy as the first thing after bootup. | |
61 | */ | |
62 | ||
63 | /* | |
64 | * 1993/4/29 -- Linus -- cleaned up the timer handling in the kernel, and | |
65 | * this helped the floppy driver as well. Much cleaner, and still seems to | |
66 | * work. | |
67 | */ | |
68 | ||
69 | /* 1994/6/24 --bbroad-- added the floppy table entries and made | |
70 | * minor modifications to allow 2.88 floppies to be run. | |
71 | */ | |
72 | ||
73 | /* 1994/7/13 -- Paul Vojta -- modified the probing code to allow three or more | |
74 | * disk types. | |
75 | */ | |
76 | ||
77 | /* | |
78 | * 1994/8/8 -- Alain Knaff -- Switched to fdpatch driver: Support for bigger | |
79 | * format bug fixes, but unfortunately some new bugs too... | |
80 | */ | |
81 | ||
82 | /* 1994/9/17 -- Koen Holtman -- added logging of physical floppy write | |
83 | * errors to allow safe writing by specialized programs. | |
84 | */ | |
85 | ||
86 | /* 1995/4/24 -- Dan Fandrich -- added support for Commodore 1581 3.5" disks | |
87 | * by defining bit 1 of the "stretch" parameter to mean put sectors on the | |
88 | * opposite side of the disk, leaving the sector IDs alone (i.e. Commodore's | |
89 | * drives are "upside-down"). | |
90 | */ | |
91 | ||
92 | /* | |
93 | * 1995/8/26 -- Andreas Busse -- added Mips support. | |
94 | */ | |
95 | ||
96 | /* | |
97 | * 1995/10/18 -- Ralf Baechle -- Portability cleanup; move machine dependent | |
98 | * features to asm/floppy.h. | |
99 | */ | |
100 | ||
b88b0985 JN |
101 | /* |
102 | * 1998/1/21 -- Richard Gooch <rgooch@atnf.csiro.au> -- devfs support | |
103 | */ | |
104 | ||
1da177e4 LT |
105 | /* |
106 | * 1998/05/07 -- Russell King -- More portability cleanups; moved definition of | |
107 | * interrupt and dma channel to asm/floppy.h. Cleaned up some formatting & | |
108 | * use of '0' for NULL. | |
109 | */ | |
110 | ||
111 | /* | |
112 | * 1998/06/07 -- Alan Cox -- Merged the 2.0.34 fixes for resource allocation | |
113 | * failures. | |
114 | */ | |
115 | ||
116 | /* | |
117 | * 1998/09/20 -- David Weinehall -- Added slow-down code for buggy PS/2-drives. | |
118 | */ | |
119 | ||
120 | /* | |
121 | * 1999/08/13 -- Paul Slootman -- floppy stopped working on Alpha after 24 | |
122 | * days, 6 hours, 32 minutes and 32 seconds (i.e. MAXINT jiffies; ints were | |
123 | * being used to store jiffies, which are unsigned longs). | |
124 | */ | |
125 | ||
126 | /* | |
127 | * 2000/08/28 -- Arnaldo Carvalho de Melo <acme@conectiva.com.br> | |
128 | * - get rid of check_region | |
129 | * - s/suser/capable/ | |
130 | */ | |
131 | ||
132 | /* | |
133 | * 2001/08/26 -- Paul Gortmaker - fix insmod oops on machines with no | |
134 | * floppy controller (lingering task on list after module is gone... boom.) | |
135 | */ | |
136 | ||
137 | /* | |
138 | * 2002/02/07 -- Anton Altaparmakov - Fix io ports reservation to correct range | |
139 | * (0x3f2-0x3f5, 0x3f7). This fix is a bit of a hack but the proper fix | |
140 | * requires many non-obvious changes in arch dependent code. | |
141 | */ | |
142 | ||
143 | /* 2003/07/28 -- Daniele Bellucci <bellucda@tiscali.it>. | |
144 | * Better audit of register_blkdev. | |
145 | */ | |
146 | ||
1da177e4 LT |
147 | #undef FLOPPY_SILENT_DCL_CLEAR |
148 | ||
149 | #define REALLY_SLOW_IO | |
150 | ||
151 | #define DEBUGT 2 | |
1da177e4 | 152 | |
891eda80 JP |
153 | #define DPRINT(format, args...) \ |
154 | pr_info("floppy%d: " format, current_drive, ##args) | |
155 | ||
156 | #define DCL_DEBUG /* debug disk change line */ | |
87f530d8 JP |
157 | #ifdef DCL_DEBUG |
158 | #define debug_dcl(test, fmt, args...) \ | |
159 | do { if ((test) & FD_DEBUG) DPRINT(fmt, ##args); } while (0) | |
160 | #else | |
161 | #define debug_dcl(test, fmt, args...) \ | |
162 | do { if (0) DPRINT(fmt, ##args); } while (0) | |
163 | #endif | |
164 | ||
1da177e4 LT |
165 | /* do print messages for unexpected interrupts */ |
166 | static int print_unex = 1; | |
167 | #include <linux/module.h> | |
168 | #include <linux/sched.h> | |
169 | #include <linux/fs.h> | |
170 | #include <linux/kernel.h> | |
171 | #include <linux/timer.h> | |
172 | #include <linux/workqueue.h> | |
173 | #define FDPATCHES | |
174 | #include <linux/fdreg.h> | |
1da177e4 LT |
175 | #include <linux/fd.h> |
176 | #include <linux/hdreg.h> | |
1da177e4 LT |
177 | #include <linux/errno.h> |
178 | #include <linux/slab.h> | |
179 | #include <linux/mm.h> | |
180 | #include <linux/bio.h> | |
181 | #include <linux/string.h> | |
50297cbf | 182 | #include <linux/jiffies.h> |
1da177e4 LT |
183 | #include <linux/fcntl.h> |
184 | #include <linux/delay.h> | |
185 | #include <linux/mc146818rtc.h> /* CMOS defines */ | |
186 | #include <linux/ioport.h> | |
187 | #include <linux/interrupt.h> | |
188 | #include <linux/init.h> | |
d052d1be | 189 | #include <linux/platform_device.h> |
83f9ef46 | 190 | #include <linux/mod_devicetable.h> |
b1c82b5c | 191 | #include <linux/mutex.h> |
d4937543 JP |
192 | #include <linux/io.h> |
193 | #include <linux/uaccess.h> | |
0cc15d03 | 194 | #include <linux/async.h> |
229b53c9 | 195 | #include <linux/compat.h> |
1da177e4 LT |
196 | |
197 | /* | |
198 | * PS/2 floppies have much slower step rates than regular floppies. | |
199 | * It's been recommended that take about 1/4 of the default speed | |
200 | * in some more extreme cases. | |
201 | */ | |
2a48fc0a | 202 | static DEFINE_MUTEX(floppy_mutex); |
1da177e4 LT |
203 | static int slow_floppy; |
204 | ||
205 | #include <asm/dma.h> | |
206 | #include <asm/irq.h> | |
1da177e4 LT |
207 | |
208 | static int FLOPPY_IRQ = 6; | |
209 | static int FLOPPY_DMA = 2; | |
210 | static int can_use_virtual_dma = 2; | |
211 | /* ======= | |
212 | * can use virtual DMA: | |
213 | * 0 = use of virtual DMA disallowed by config | |
214 | * 1 = use of virtual DMA prescribed by config | |
215 | * 2 = no virtual DMA preference configured. By default try hard DMA, | |
216 | * but fall back on virtual DMA when not enough memory available | |
217 | */ | |
218 | ||
219 | static int use_virtual_dma; | |
220 | /* ======= | |
221 | * use virtual DMA | |
222 | * 0 using hard DMA | |
223 | * 1 using virtual DMA | |
224 | * This variable is set to virtual when a DMA mem problem arises, and | |
225 | * reset back in floppy_grab_irq_and_dma. | |
226 | * It is not safe to reset it in other circumstances, because the floppy | |
227 | * driver may have several buffers in use at once, and we do currently not | |
228 | * record each buffers capabilities | |
229 | */ | |
230 | ||
231 | static DEFINE_SPINLOCK(floppy_lock); | |
1da177e4 LT |
232 | |
233 | static unsigned short virtual_dma_port = 0x3f0; | |
7d12e780 | 234 | irqreturn_t floppy_interrupt(int irq, void *dev_id); |
1da177e4 | 235 | static int set_dor(int fdc, char mask, char data); |
1da177e4 LT |
236 | |
237 | #define K_64 0x10000 /* 64KB */ | |
238 | ||
239 | /* the following is the mask of allowed drives. By default units 2 and | |
240 | * 3 of both floppy controllers are disabled, because switching on the | |
241 | * motor of these drives causes system hangs on some PCI computers. drive | |
242 | * 0 is the low bit (0x1), and drive 7 is the high bit (0x80). Bits are on if | |
243 | * a drive is allowed. | |
244 | * | |
245 | * NOTE: This must come before we include the arch floppy header because | |
246 | * some ports reference this variable from there. -DaveM | |
247 | */ | |
248 | ||
249 | static int allowed_drive_mask = 0x33; | |
250 | ||
251 | #include <asm/floppy.h> | |
252 | ||
253 | static int irqdma_allocated; | |
254 | ||
1da177e4 LT |
255 | #include <linux/blkdev.h> |
256 | #include <linux/blkpg.h> | |
257 | #include <linux/cdrom.h> /* for the compatibility eject ioctl */ | |
258 | #include <linux/completion.h> | |
259 | ||
260 | static struct request *current_req; | |
48c8cee6 | 261 | static void do_fd_request(struct request_queue *q); |
48821184 | 262 | static int set_next_request(void); |
1da177e4 LT |
263 | |
264 | #ifndef fd_get_dma_residue | |
265 | #define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA) | |
266 | #endif | |
267 | ||
268 | /* Dma Memory related stuff */ | |
269 | ||
270 | #ifndef fd_dma_mem_free | |
271 | #define fd_dma_mem_free(addr, size) free_pages(addr, get_order(size)) | |
272 | #endif | |
273 | ||
274 | #ifndef fd_dma_mem_alloc | |
48c8cee6 | 275 | #define fd_dma_mem_alloc(size) __get_dma_pages(GFP_KERNEL, get_order(size)) |
1da177e4 LT |
276 | #endif |
277 | ||
278 | static inline void fallback_on_nodma_alloc(char **addr, size_t l) | |
279 | { | |
280 | #ifdef FLOPPY_CAN_FALLBACK_ON_NODMA | |
281 | if (*addr) | |
282 | return; /* we have the memory */ | |
283 | if (can_use_virtual_dma != 2) | |
284 | return; /* no fallback allowed */ | |
b46df356 | 285 | pr_info("DMA memory shortage. Temporarily falling back on virtual DMA\n"); |
1da177e4 LT |
286 | *addr = (char *)nodma_mem_alloc(l); |
287 | #else | |
288 | return; | |
289 | #endif | |
290 | } | |
291 | ||
292 | /* End dma memory related stuff */ | |
293 | ||
294 | static unsigned long fake_change; | |
29f1c784 | 295 | static bool initialized; |
1da177e4 | 296 | |
48c8cee6 JP |
297 | #define ITYPE(x) (((x) >> 2) & 0x1f) |
298 | #define TOMINOR(x) ((x & 3) | ((x & 4) << 5)) | |
299 | #define UNIT(x) ((x) & 0x03) /* drive on fdc */ | |
300 | #define FDC(x) (((x) & 0x04) >> 2) /* fdc of drive */ | |
06f748c4 | 301 | /* reverse mapping from unit and fdc to drive */ |
1da177e4 | 302 | #define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2)) |
1da177e4 | 303 | |
48c8cee6 JP |
304 | #define DP (&drive_params[current_drive]) |
305 | #define DRS (&drive_state[current_drive]) | |
306 | #define DRWE (&write_errors[current_drive]) | |
307 | #define FDCS (&fdc_state[fdc]) | |
1da177e4 | 308 | |
48c8cee6 JP |
309 | #define UDP (&drive_params[drive]) |
310 | #define UDRS (&drive_state[drive]) | |
311 | #define UDRWE (&write_errors[drive]) | |
312 | #define UFDCS (&fdc_state[FDC(drive)]) | |
1da177e4 | 313 | |
48c8cee6 JP |
314 | #define PH_HEAD(floppy, head) (((((floppy)->stretch & 2) >> 1) ^ head) << 2) |
315 | #define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH) | |
316 | ||
1da177e4 | 317 | /* read/write */ |
48c8cee6 JP |
318 | #define COMMAND (raw_cmd->cmd[0]) |
319 | #define DR_SELECT (raw_cmd->cmd[1]) | |
320 | #define TRACK (raw_cmd->cmd[2]) | |
321 | #define HEAD (raw_cmd->cmd[3]) | |
322 | #define SECTOR (raw_cmd->cmd[4]) | |
323 | #define SIZECODE (raw_cmd->cmd[5]) | |
324 | #define SECT_PER_TRACK (raw_cmd->cmd[6]) | |
325 | #define GAP (raw_cmd->cmd[7]) | |
326 | #define SIZECODE2 (raw_cmd->cmd[8]) | |
1da177e4 LT |
327 | #define NR_RW 9 |
328 | ||
329 | /* format */ | |
48c8cee6 JP |
330 | #define F_SIZECODE (raw_cmd->cmd[2]) |
331 | #define F_SECT_PER_TRACK (raw_cmd->cmd[3]) | |
332 | #define F_GAP (raw_cmd->cmd[4]) | |
333 | #define F_FILL (raw_cmd->cmd[5]) | |
1da177e4 LT |
334 | #define NR_F 6 |
335 | ||
336 | /* | |
48c8cee6 JP |
337 | * Maximum disk size (in kilobytes). |
338 | * This default is used whenever the current disk size is unknown. | |
1da177e4 LT |
339 | * [Now it is rather a minimum] |
340 | */ | |
341 | #define MAX_DISK_SIZE 4 /* 3984 */ | |
342 | ||
343 | /* | |
344 | * globals used by 'result()' | |
345 | */ | |
346 | #define MAX_REPLIES 16 | |
347 | static unsigned char reply_buffer[MAX_REPLIES]; | |
891eda80 | 348 | static int inr; /* size of reply buffer, when called from interrupt */ |
48c8cee6 JP |
349 | #define ST0 (reply_buffer[0]) |
350 | #define ST1 (reply_buffer[1]) | |
351 | #define ST2 (reply_buffer[2]) | |
352 | #define ST3 (reply_buffer[0]) /* result of GETSTATUS */ | |
353 | #define R_TRACK (reply_buffer[3]) | |
354 | #define R_HEAD (reply_buffer[4]) | |
355 | #define R_SECTOR (reply_buffer[5]) | |
356 | #define R_SIZECODE (reply_buffer[6]) | |
357 | ||
358 | #define SEL_DLY (2 * HZ / 100) | |
1da177e4 LT |
359 | |
360 | /* | |
361 | * this struct defines the different floppy drive types. | |
362 | */ | |
363 | static struct { | |
364 | struct floppy_drive_params params; | |
365 | const char *name; /* name printed while booting */ | |
366 | } default_drive_params[] = { | |
367 | /* NOTE: the time values in jiffies should be in msec! | |
368 | CMOS drive type | |
369 | | Maximum data rate supported by drive type | |
370 | | | Head load time, msec | |
371 | | | | Head unload time, msec (not used) | |
372 | | | | | Step rate interval, usec | |
373 | | | | | | Time needed for spinup time (jiffies) | |
374 | | | | | | | Timeout for spinning down (jiffies) | |
375 | | | | | | | | Spindown offset (where disk stops) | |
376 | | | | | | | | | Select delay | |
377 | | | | | | | | | | RPS | |
378 | | | | | | | | | | | Max number of tracks | |
379 | | | | | | | | | | | | Interrupt timeout | |
380 | | | | | | | | | | | | | Max nonintlv. sectors | |
381 | | | | | | | | | | | | | | -Max Errors- flags */ | |
382 | {{0, 500, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 80, 3*HZ, 20, {3,1,2,0,2}, 0, | |
383 | 0, { 7, 4, 8, 2, 1, 5, 3,10}, 3*HZ/2, 0 }, "unknown" }, | |
384 | ||
385 | {{1, 300, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 40, 3*HZ, 17, {3,1,2,0,2}, 0, | |
386 | 0, { 1, 0, 0, 0, 0, 0, 0, 0}, 3*HZ/2, 1 }, "360K PC" }, /*5 1/4 360 KB PC*/ | |
387 | ||
388 | {{2, 500, 16, 16, 6000, 4*HZ/10, 3*HZ, 14, SEL_DLY, 6, 83, 3*HZ, 17, {3,1,2,0,2}, 0, | |
389 | 0, { 2, 5, 6,23,10,20,12, 0}, 3*HZ/2, 2 }, "1.2M" }, /*5 1/4 HD AT*/ | |
390 | ||
391 | {{3, 250, 16, 16, 3000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0, | |
392 | 0, { 4,22,21,30, 3, 0, 0, 0}, 3*HZ/2, 4 }, "720k" }, /*3 1/2 DD*/ | |
393 | ||
394 | {{4, 500, 16, 16, 4000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0, | |
395 | 0, { 7, 4,25,22,31,21,29,11}, 3*HZ/2, 7 }, "1.44M" }, /*3 1/2 HD*/ | |
396 | ||
397 | {{5, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0, | |
398 | 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M AMI BIOS" }, /*3 1/2 ED*/ | |
399 | ||
400 | {{6, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0, | |
401 | 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M" } /*3 1/2 ED*/ | |
402 | /* | --autodetected formats--- | | | | |
403 | * read_track | | Name printed when booting | |
404 | * | Native format | |
405 | * Frequency of disk change checks */ | |
406 | }; | |
407 | ||
408 | static struct floppy_drive_params drive_params[N_DRIVE]; | |
409 | static struct floppy_drive_struct drive_state[N_DRIVE]; | |
410 | static struct floppy_write_errors write_errors[N_DRIVE]; | |
411 | static struct timer_list motor_off_timer[N_DRIVE]; | |
412 | static struct gendisk *disks[N_DRIVE]; | |
413 | static struct block_device *opened_bdev[N_DRIVE]; | |
b1c82b5c | 414 | static DEFINE_MUTEX(open_lock); |
1da177e4 | 415 | static struct floppy_raw_cmd *raw_cmd, default_raw_cmd; |
48821184 | 416 | static int fdc_queue; |
1da177e4 LT |
417 | |
418 | /* | |
419 | * This struct defines the different floppy types. | |
420 | * | |
421 | * Bit 0 of 'stretch' tells if the tracks need to be doubled for some | |
422 | * types (e.g. 360kB diskette in 1.2MB drive, etc.). Bit 1 of 'stretch' | |
423 | * tells if the disk is in Commodore 1581 format, which means side 0 sectors | |
424 | * are located on side 1 of the disk but with a side 0 ID, and vice-versa. | |
425 | * This is the same as the Sharp MZ-80 5.25" CP/M disk format, except that the | |
426 | * 1581's logical side 0 is on physical side 1, whereas the Sharp's logical | |
427 | * side 0 is on physical side 0 (but with the misnamed sector IDs). | |
428 | * 'stretch' should probably be renamed to something more general, like | |
9e49184c KW |
429 | * 'options'. |
430 | * | |
431 | * Bits 2 through 9 of 'stretch' tell the number of the first sector. | |
432 | * The LSB (bit 2) is flipped. For most disks, the first sector | |
433 | * is 1 (represented by 0x00<<2). For some CP/M and music sampler | |
434 | * disks (such as Ensoniq EPS 16plus) it is 0 (represented as 0x01<<2). | |
435 | * For Amstrad CPC disks it is 0xC1 (represented as 0xC0<<2). | |
436 | * | |
437 | * Other parameters should be self-explanatory (see also setfdprm(8)). | |
1da177e4 LT |
438 | */ |
439 | /* | |
440 | Size | |
441 | | Sectors per track | |
442 | | | Head | |
443 | | | | Tracks | |
444 | | | | | Stretch | |
445 | | | | | | Gap 1 size | |
446 | | | | | | | Data rate, | 0x40 for perp | |
447 | | | | | | | | Spec1 (stepping rate, head unload | |
448 | | | | | | | | | /fmt gap (gap2) */ | |
449 | static struct floppy_struct floppy_type[32] = { | |
450 | { 0, 0,0, 0,0,0x00,0x00,0x00,0x00,NULL }, /* 0 no testing */ | |
451 | { 720, 9,2,40,0,0x2A,0x02,0xDF,0x50,"d360" }, /* 1 360KB PC */ | |
452 | { 2400,15,2,80,0,0x1B,0x00,0xDF,0x54,"h1200" }, /* 2 1.2MB AT */ | |
453 | { 720, 9,1,80,0,0x2A,0x02,0xDF,0x50,"D360" }, /* 3 360KB SS 3.5" */ | |
454 | { 1440, 9,2,80,0,0x2A,0x02,0xDF,0x50,"D720" }, /* 4 720KB 3.5" */ | |
455 | { 720, 9,2,40,1,0x23,0x01,0xDF,0x50,"h360" }, /* 5 360KB AT */ | |
456 | { 1440, 9,2,80,0,0x23,0x01,0xDF,0x50,"h720" }, /* 6 720KB AT */ | |
457 | { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,"H1440" }, /* 7 1.44MB 3.5" */ | |
458 | { 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"E2880" }, /* 8 2.88MB 3.5" */ | |
459 | { 6240,39,2,80,0,0x1B,0x43,0xAF,0x28,"E3120" }, /* 9 3.12MB 3.5" */ | |
460 | ||
461 | { 2880,18,2,80,0,0x25,0x00,0xDF,0x02,"h1440" }, /* 10 1.44MB 5.25" */ | |
462 | { 3360,21,2,80,0,0x1C,0x00,0xCF,0x0C,"H1680" }, /* 11 1.68MB 3.5" */ | |
463 | { 820,10,2,41,1,0x25,0x01,0xDF,0x2E,"h410" }, /* 12 410KB 5.25" */ | |
464 | { 1640,10,2,82,0,0x25,0x02,0xDF,0x2E,"H820" }, /* 13 820KB 3.5" */ | |
465 | { 2952,18,2,82,0,0x25,0x00,0xDF,0x02,"h1476" }, /* 14 1.48MB 5.25" */ | |
466 | { 3444,21,2,82,0,0x25,0x00,0xDF,0x0C,"H1722" }, /* 15 1.72MB 3.5" */ | |
467 | { 840,10,2,42,1,0x25,0x01,0xDF,0x2E,"h420" }, /* 16 420KB 5.25" */ | |
468 | { 1660,10,2,83,0,0x25,0x02,0xDF,0x2E,"H830" }, /* 17 830KB 3.5" */ | |
469 | { 2988,18,2,83,0,0x25,0x00,0xDF,0x02,"h1494" }, /* 18 1.49MB 5.25" */ | |
470 | { 3486,21,2,83,0,0x25,0x00,0xDF,0x0C,"H1743" }, /* 19 1.74 MB 3.5" */ | |
471 | ||
472 | { 1760,11,2,80,0,0x1C,0x09,0xCF,0x00,"h880" }, /* 20 880KB 5.25" */ | |
473 | { 2080,13,2,80,0,0x1C,0x01,0xCF,0x00,"D1040" }, /* 21 1.04MB 3.5" */ | |
474 | { 2240,14,2,80,0,0x1C,0x19,0xCF,0x00,"D1120" }, /* 22 1.12MB 3.5" */ | |
475 | { 3200,20,2,80,0,0x1C,0x20,0xCF,0x2C,"h1600" }, /* 23 1.6MB 5.25" */ | |
476 | { 3520,22,2,80,0,0x1C,0x08,0xCF,0x2e,"H1760" }, /* 24 1.76MB 3.5" */ | |
477 | { 3840,24,2,80,0,0x1C,0x20,0xCF,0x00,"H1920" }, /* 25 1.92MB 3.5" */ | |
478 | { 6400,40,2,80,0,0x25,0x5B,0xCF,0x00,"E3200" }, /* 26 3.20MB 3.5" */ | |
479 | { 7040,44,2,80,0,0x25,0x5B,0xCF,0x00,"E3520" }, /* 27 3.52MB 3.5" */ | |
480 | { 7680,48,2,80,0,0x25,0x63,0xCF,0x00,"E3840" }, /* 28 3.84MB 3.5" */ | |
1da177e4 | 481 | { 3680,23,2,80,0,0x1C,0x10,0xCF,0x00,"H1840" }, /* 29 1.84MB 3.5" */ |
06f748c4 | 482 | |
1da177e4 LT |
483 | { 1600,10,2,80,0,0x25,0x02,0xDF,0x2E,"D800" }, /* 30 800KB 3.5" */ |
484 | { 3200,20,2,80,0,0x1C,0x00,0xCF,0x2C,"H1600" }, /* 31 1.6MB 3.5" */ | |
485 | }; | |
486 | ||
1da177e4 LT |
487 | #define SECTSIZE (_FD_SECTSIZE(*floppy)) |
488 | ||
489 | /* Auto-detection: Disk type used until the next media change occurs. */ | |
490 | static struct floppy_struct *current_type[N_DRIVE]; | |
491 | ||
492 | /* | |
493 | * User-provided type information. current_type points to | |
494 | * the respective entry of this array. | |
495 | */ | |
496 | static struct floppy_struct user_params[N_DRIVE]; | |
497 | ||
498 | static sector_t floppy_sizes[256]; | |
499 | ||
94fd0db7 HR |
500 | static char floppy_device_name[] = "floppy"; |
501 | ||
1da177e4 LT |
502 | /* |
503 | * The driver is trying to determine the correct media format | |
504 | * while probing is set. rw_interrupt() clears it after a | |
505 | * successful access. | |
506 | */ | |
507 | static int probing; | |
508 | ||
509 | /* Synchronization of FDC access. */ | |
48c8cee6 JP |
510 | #define FD_COMMAND_NONE -1 |
511 | #define FD_COMMAND_ERROR 2 | |
512 | #define FD_COMMAND_OKAY 3 | |
1da177e4 LT |
513 | |
514 | static volatile int command_status = FD_COMMAND_NONE; | |
515 | static unsigned long fdc_busy; | |
516 | static DECLARE_WAIT_QUEUE_HEAD(fdc_wait); | |
517 | static DECLARE_WAIT_QUEUE_HEAD(command_done); | |
518 | ||
1da177e4 LT |
519 | /* Errors during formatting are counted here. */ |
520 | static int format_errors; | |
521 | ||
522 | /* Format request descriptor. */ | |
523 | static struct format_descr format_req; | |
524 | ||
525 | /* | |
526 | * Rate is 0 for 500kb/s, 1 for 300kbps, 2 for 250kbps | |
527 | * Spec1 is 0xSH, where S is stepping rate (F=1ms, E=2ms, D=3ms etc), | |
528 | * H is head unload time (1=16ms, 2=32ms, etc) | |
529 | */ | |
530 | ||
531 | /* | |
532 | * Track buffer | |
533 | * Because these are written to by the DMA controller, they must | |
534 | * not contain a 64k byte boundary crossing, or data will be | |
535 | * corrupted/lost. | |
536 | */ | |
537 | static char *floppy_track_buffer; | |
538 | static int max_buffer_sectors; | |
539 | ||
540 | static int *errors; | |
06f748c4 | 541 | typedef void (*done_f)(int); |
3b06c21e | 542 | static const struct cont_t { |
48c8cee6 JP |
543 | void (*interrupt)(void); |
544 | /* this is called after the interrupt of the | |
545 | * main command */ | |
06f748c4 JJ |
546 | void (*redo)(void); /* this is called to retry the operation */ |
547 | void (*error)(void); /* this is called to tally an error */ | |
1da177e4 LT |
548 | done_f done; /* this is called to say if the operation has |
549 | * succeeded/failed */ | |
550 | } *cont; | |
551 | ||
552 | static void floppy_ready(void); | |
553 | static void floppy_start(void); | |
554 | static void process_fd_request(void); | |
555 | static void recalibrate_floppy(void); | |
070ad7e7 | 556 | static void floppy_shutdown(struct work_struct *); |
1da177e4 | 557 | |
5a74db06 PDM |
558 | static int floppy_request_regions(int); |
559 | static void floppy_release_regions(int); | |
1da177e4 LT |
560 | static int floppy_grab_irq_and_dma(void); |
561 | static void floppy_release_irq_and_dma(void); | |
562 | ||
563 | /* | |
564 | * The "reset" variable should be tested whenever an interrupt is scheduled, | |
565 | * after the commands have been sent. This is to ensure that the driver doesn't | |
566 | * get wedged when the interrupt doesn't come because of a failed command. | |
567 | * reset doesn't need to be tested before sending commands, because | |
568 | * output_byte is automatically disabled when reset is set. | |
569 | */ | |
1da177e4 LT |
570 | static void reset_fdc(void); |
571 | ||
572 | /* | |
573 | * These are global variables, as that's the easiest way to give | |
574 | * information to interrupts. They are the data used for the current | |
575 | * request. | |
576 | */ | |
48c8cee6 JP |
577 | #define NO_TRACK -1 |
578 | #define NEED_1_RECAL -2 | |
579 | #define NEED_2_RECAL -3 | |
1da177e4 | 580 | |
575cfc67 | 581 | static atomic_t usage_count = ATOMIC_INIT(0); |
1da177e4 LT |
582 | |
583 | /* buffer related variables */ | |
584 | static int buffer_track = -1; | |
585 | static int buffer_drive = -1; | |
586 | static int buffer_min = -1; | |
587 | static int buffer_max = -1; | |
588 | ||
589 | /* fdc related variables, should end up in a struct */ | |
590 | static struct floppy_fdc_state fdc_state[N_FDC]; | |
591 | static int fdc; /* current fdc */ | |
592 | ||
070ad7e7 JK |
593 | static struct workqueue_struct *floppy_wq; |
594 | ||
1da177e4 LT |
595 | static struct floppy_struct *_floppy = floppy_type; |
596 | static unsigned char current_drive; | |
597 | static long current_count_sectors; | |
598 | static unsigned char fsector_t; /* sector in track */ | |
599 | static unsigned char in_sector_offset; /* offset within physical sector, | |
600 | * expressed in units of 512 bytes */ | |
601 | ||
2b51dca7 PE |
602 | static inline bool drive_no_geom(int drive) |
603 | { | |
604 | return !current_type[drive] && !ITYPE(UDRS->fd_device); | |
605 | } | |
606 | ||
1da177e4 LT |
607 | #ifndef fd_eject |
608 | static inline int fd_eject(int drive) | |
609 | { | |
610 | return -EINVAL; | |
611 | } | |
612 | #endif | |
613 | ||
614 | /* | |
615 | * Debugging | |
616 | * ========= | |
617 | */ | |
618 | #ifdef DEBUGT | |
619 | static long unsigned debugtimer; | |
620 | ||
621 | static inline void set_debugt(void) | |
622 | { | |
623 | debugtimer = jiffies; | |
624 | } | |
625 | ||
ded2863d | 626 | static inline void debugt(const char *func, const char *msg) |
1da177e4 LT |
627 | { |
628 | if (DP->flags & DEBUGT) | |
ded2863d | 629 | pr_info("%s:%s dtime=%lu\n", func, msg, jiffies - debugtimer); |
1da177e4 LT |
630 | } |
631 | #else | |
632 | static inline void set_debugt(void) { } | |
ded2863d | 633 | static inline void debugt(const char *func, const char *msg) { } |
1da177e4 LT |
634 | #endif /* DEBUGT */ |
635 | ||
1da177e4 | 636 | |
070ad7e7 | 637 | static DECLARE_DELAYED_WORK(fd_timeout, floppy_shutdown); |
1da177e4 LT |
638 | static const char *timeout_message; |
639 | ||
275176bc | 640 | static void is_alive(const char *func, const char *message) |
1da177e4 LT |
641 | { |
642 | /* this routine checks whether the floppy driver is "alive" */ | |
c529730a | 643 | if (test_bit(0, &fdc_busy) && command_status < 2 && |
070ad7e7 | 644 | !delayed_work_pending(&fd_timeout)) { |
275176bc | 645 | DPRINT("%s: timeout handler died. %s\n", func, message); |
1da177e4 LT |
646 | } |
647 | } | |
1da177e4 | 648 | |
48c8cee6 | 649 | static void (*do_floppy)(void) = NULL; |
1da177e4 | 650 | |
1da177e4 LT |
651 | #define OLOGSIZE 20 |
652 | ||
48c8cee6 | 653 | static void (*lasthandler)(void); |
1da177e4 LT |
654 | static unsigned long interruptjiffies; |
655 | static unsigned long resultjiffies; | |
656 | static int resultsize; | |
657 | static unsigned long lastredo; | |
658 | ||
659 | static struct output_log { | |
660 | unsigned char data; | |
661 | unsigned char status; | |
662 | unsigned long jiffies; | |
663 | } output_log[OLOGSIZE]; | |
664 | ||
665 | static int output_log_pos; | |
1da177e4 LT |
666 | |
667 | #define current_reqD -1 | |
668 | #define MAXTIMEOUT -2 | |
669 | ||
73507e6c | 670 | static void __reschedule_timeout(int drive, const char *message) |
1da177e4 | 671 | { |
070ad7e7 JK |
672 | unsigned long delay; |
673 | ||
1da177e4 LT |
674 | if (drive == current_reqD) |
675 | drive = current_drive; | |
070ad7e7 | 676 | |
4acb3e2f | 677 | if (drive < 0 || drive >= N_DRIVE) { |
070ad7e7 | 678 | delay = 20UL * HZ; |
1da177e4 LT |
679 | drive = 0; |
680 | } else | |
070ad7e7 JK |
681 | delay = UDP->timeout; |
682 | ||
e7c2f967 | 683 | mod_delayed_work(floppy_wq, &fd_timeout, delay); |
a81ee544 | 684 | if (UDP->flags & FD_DEBUG) |
73507e6c | 685 | DPRINT("reschedule timeout %s\n", message); |
1da177e4 LT |
686 | timeout_message = message; |
687 | } | |
688 | ||
73507e6c | 689 | static void reschedule_timeout(int drive, const char *message) |
1da177e4 LT |
690 | { |
691 | unsigned long flags; | |
692 | ||
693 | spin_lock_irqsave(&floppy_lock, flags); | |
73507e6c | 694 | __reschedule_timeout(drive, message); |
1da177e4 LT |
695 | spin_unlock_irqrestore(&floppy_lock, flags); |
696 | } | |
697 | ||
48c8cee6 JP |
698 | #define INFBOUND(a, b) (a) = max_t(int, a, b) |
699 | #define SUPBOUND(a, b) (a) = min_t(int, a, b) | |
1da177e4 LT |
700 | |
701 | /* | |
702 | * Bottom half floppy driver. | |
703 | * ========================== | |
704 | * | |
705 | * This part of the file contains the code talking directly to the hardware, | |
706 | * and also the main service loop (seek-configure-spinup-command) | |
707 | */ | |
708 | ||
709 | /* | |
710 | * disk change. | |
711 | * This routine is responsible for maintaining the FD_DISK_CHANGE flag, | |
712 | * and the last_checked date. | |
713 | * | |
714 | * last_checked is the date of the last check which showed 'no disk change' | |
715 | * FD_DISK_CHANGE is set under two conditions: | |
716 | * 1. The floppy has been changed after some i/o to that floppy already | |
717 | * took place. | |
718 | * 2. No floppy disk is in the drive. This is done in order to ensure that | |
719 | * requests are quickly flushed in case there is no disk in the drive. It | |
720 | * follows that FD_DISK_CHANGE can only be cleared if there is a disk in | |
721 | * the drive. | |
722 | * | |
723 | * For 1., maxblock is observed. Maxblock is 0 if no i/o has taken place yet. | |
724 | * For 2., FD_DISK_NEWCHANGE is watched. FD_DISK_NEWCHANGE is cleared on | |
725 | * each seek. If a disk is present, the disk change line should also be | |
726 | * cleared on each seek. Thus, if FD_DISK_NEWCHANGE is clear, but the disk | |
727 | * change line is set, this means either that no disk is in the drive, or | |
728 | * that it has been removed since the last seek. | |
729 | * | |
730 | * This means that we really have a third possibility too: | |
731 | * The floppy has been changed after the last seek. | |
732 | */ | |
733 | ||
734 | static int disk_change(int drive) | |
735 | { | |
736 | int fdc = FDC(drive); | |
06f748c4 | 737 | |
50297cbf | 738 | if (time_before(jiffies, UDRS->select_date + UDP->select_delay)) |
1da177e4 LT |
739 | DPRINT("WARNING disk change called early\n"); |
740 | if (!(FDCS->dor & (0x10 << UNIT(drive))) || | |
741 | (FDCS->dor & 3) != UNIT(drive) || fdc != FDC(drive)) { | |
742 | DPRINT("probing disk change on unselected drive\n"); | |
743 | DPRINT("drive=%d fdc=%d dor=%x\n", drive, FDC(drive), | |
744 | (unsigned int)FDCS->dor); | |
745 | } | |
1da177e4 | 746 | |
87f530d8 JP |
747 | debug_dcl(UDP->flags, |
748 | "checking disk change line for drive %d\n", drive); | |
749 | debug_dcl(UDP->flags, "jiffies=%lu\n", jiffies); | |
750 | debug_dcl(UDP->flags, "disk change line=%x\n", fd_inb(FD_DIR) & 0x80); | |
751 | debug_dcl(UDP->flags, "flags=%lx\n", UDRS->flags); | |
752 | ||
1da177e4 | 753 | if (UDP->flags & FD_BROKEN_DCL) |
e0298536 | 754 | return test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); |
1da177e4 | 755 | if ((fd_inb(FD_DIR) ^ UDP->flags) & 0x80) { |
e0298536 JP |
756 | set_bit(FD_VERIFY_BIT, &UDRS->flags); |
757 | /* verify write protection */ | |
758 | ||
759 | if (UDRS->maxblock) /* mark it changed */ | |
760 | set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); | |
1da177e4 LT |
761 | |
762 | /* invalidate its geometry */ | |
763 | if (UDRS->keep_data >= 0) { | |
764 | if ((UDP->flags & FTD_MSG) && | |
765 | current_type[drive] != NULL) | |
891eda80 | 766 | DPRINT("Disk type is undefined after disk change\n"); |
1da177e4 LT |
767 | current_type[drive] = NULL; |
768 | floppy_sizes[TOMINOR(drive)] = MAX_DISK_SIZE << 1; | |
769 | } | |
770 | ||
1da177e4 LT |
771 | return 1; |
772 | } else { | |
773 | UDRS->last_checked = jiffies; | |
e0298536 | 774 | clear_bit(FD_DISK_NEWCHANGE_BIT, &UDRS->flags); |
1da177e4 LT |
775 | } |
776 | return 0; | |
777 | } | |
778 | ||
779 | static inline int is_selected(int dor, int unit) | |
780 | { | |
781 | return ((dor & (0x10 << unit)) && (dor & 3) == unit); | |
782 | } | |
783 | ||
57584c5a JP |
784 | static bool is_ready_state(int status) |
785 | { | |
786 | int state = status & (STATUS_READY | STATUS_DIR | STATUS_DMA); | |
787 | return state == STATUS_READY; | |
788 | } | |
789 | ||
1da177e4 LT |
790 | static int set_dor(int fdc, char mask, char data) |
791 | { | |
fdc1ca8a JJ |
792 | unsigned char unit; |
793 | unsigned char drive; | |
794 | unsigned char newdor; | |
795 | unsigned char olddor; | |
1da177e4 LT |
796 | |
797 | if (FDCS->address == -1) | |
798 | return -1; | |
799 | ||
800 | olddor = FDCS->dor; | |
801 | newdor = (olddor & mask) | data; | |
802 | if (newdor != olddor) { | |
803 | unit = olddor & 0x3; | |
804 | if (is_selected(olddor, unit) && !is_selected(newdor, unit)) { | |
805 | drive = REVDRIVE(fdc, unit); | |
87f530d8 JP |
806 | debug_dcl(UDP->flags, |
807 | "calling disk change from set_dor\n"); | |
1da177e4 LT |
808 | disk_change(drive); |
809 | } | |
810 | FDCS->dor = newdor; | |
811 | fd_outb(newdor, FD_DOR); | |
812 | ||
813 | unit = newdor & 0x3; | |
814 | if (!is_selected(olddor, unit) && is_selected(newdor, unit)) { | |
815 | drive = REVDRIVE(fdc, unit); | |
816 | UDRS->select_date = jiffies; | |
817 | } | |
818 | } | |
1da177e4 LT |
819 | return olddor; |
820 | } | |
821 | ||
822 | static void twaddle(void) | |
823 | { | |
824 | if (DP->select_delay) | |
825 | return; | |
826 | fd_outb(FDCS->dor & ~(0x10 << UNIT(current_drive)), FD_DOR); | |
827 | fd_outb(FDCS->dor, FD_DOR); | |
828 | DRS->select_date = jiffies; | |
829 | } | |
830 | ||
57584c5a JP |
831 | /* |
832 | * Reset all driver information about the current fdc. | |
833 | * This is needed after a reset, and after a raw command. | |
834 | */ | |
1da177e4 LT |
835 | static void reset_fdc_info(int mode) |
836 | { | |
837 | int drive; | |
838 | ||
839 | FDCS->spec1 = FDCS->spec2 = -1; | |
840 | FDCS->need_configure = 1; | |
841 | FDCS->perp_mode = 1; | |
842 | FDCS->rawcmd = 0; | |
843 | for (drive = 0; drive < N_DRIVE; drive++) | |
844 | if (FDC(drive) == fdc && (mode || UDRS->track != NEED_1_RECAL)) | |
845 | UDRS->track = NEED_2_RECAL; | |
846 | } | |
847 | ||
848 | /* selects the fdc and drive, and enables the fdc's input/dma. */ | |
849 | static void set_fdc(int drive) | |
850 | { | |
851 | if (drive >= 0 && drive < N_DRIVE) { | |
852 | fdc = FDC(drive); | |
853 | current_drive = drive; | |
854 | } | |
855 | if (fdc != 1 && fdc != 0) { | |
b46df356 | 856 | pr_info("bad fdc value\n"); |
1da177e4 LT |
857 | return; |
858 | } | |
859 | set_dor(fdc, ~0, 8); | |
860 | #if N_FDC > 1 | |
861 | set_dor(1 - fdc, ~8, 0); | |
862 | #endif | |
863 | if (FDCS->rawcmd == 2) | |
864 | reset_fdc_info(1); | |
865 | if (fd_inb(FD_STATUS) != STATUS_READY) | |
866 | FDCS->reset = 1; | |
867 | } | |
868 | ||
869 | /* locks the driver */ | |
a0c80efe | 870 | static int lock_fdc(int drive) |
1da177e4 | 871 | { |
b862f26f SH |
872 | if (WARN(atomic_read(&usage_count) == 0, |
873 | "Trying to lock fdc while usage count=0\n")) | |
1da177e4 | 874 | return -1; |
1da177e4 | 875 | |
b862f26f SH |
876 | if (wait_event_interruptible(fdc_wait, !test_and_set_bit(0, &fdc_busy))) |
877 | return -EINTR; | |
1da177e4 | 878 | |
1da177e4 LT |
879 | command_status = FD_COMMAND_NONE; |
880 | ||
070ad7e7 | 881 | reschedule_timeout(drive, "lock fdc"); |
1da177e4 LT |
882 | set_fdc(drive); |
883 | return 0; | |
884 | } | |
885 | ||
1da177e4 | 886 | /* unlocks the driver */ |
be7a12bb | 887 | static void unlock_fdc(void) |
1da177e4 | 888 | { |
1da177e4 LT |
889 | if (!test_bit(0, &fdc_busy)) |
890 | DPRINT("FDC access conflict!\n"); | |
891 | ||
070ad7e7 | 892 | raw_cmd = NULL; |
1da177e4 | 893 | command_status = FD_COMMAND_NONE; |
136b5721 | 894 | cancel_delayed_work(&fd_timeout); |
070ad7e7 | 895 | do_floppy = NULL; |
1da177e4 LT |
896 | cont = NULL; |
897 | clear_bit(0, &fdc_busy); | |
1da177e4 LT |
898 | wake_up(&fdc_wait); |
899 | } | |
900 | ||
901 | /* switches the motor off after a given timeout */ | |
902 | static void motor_off_callback(unsigned long nr) | |
903 | { | |
904 | unsigned char mask = ~(0x10 << UNIT(nr)); | |
905 | ||
906 | set_dor(FDC(nr), mask, 0); | |
907 | } | |
908 | ||
909 | /* schedules motor off */ | |
910 | static void floppy_off(unsigned int drive) | |
911 | { | |
912 | unsigned long volatile delta; | |
fdc1ca8a | 913 | int fdc = FDC(drive); |
1da177e4 LT |
914 | |
915 | if (!(FDCS->dor & (0x10 << UNIT(drive)))) | |
916 | return; | |
917 | ||
918 | del_timer(motor_off_timer + drive); | |
919 | ||
920 | /* make spindle stop in a position which minimizes spinup time | |
921 | * next time */ | |
922 | if (UDP->rps) { | |
923 | delta = jiffies - UDRS->first_read_date + HZ - | |
924 | UDP->spindown_offset; | |
925 | delta = ((delta * UDP->rps) % HZ) / UDP->rps; | |
926 | motor_off_timer[drive].expires = | |
927 | jiffies + UDP->spindown - delta; | |
928 | } | |
929 | add_timer(motor_off_timer + drive); | |
930 | } | |
931 | ||
932 | /* | |
933 | * cycle through all N_DRIVE floppy drives, for disk change testing. | |
934 | * stopping at current drive. This is done before any long operation, to | |
935 | * be sure to have up to date disk change information. | |
936 | */ | |
937 | static void scandrives(void) | |
938 | { | |
06f748c4 JJ |
939 | int i; |
940 | int drive; | |
941 | int saved_drive; | |
1da177e4 LT |
942 | |
943 | if (DP->select_delay) | |
944 | return; | |
945 | ||
946 | saved_drive = current_drive; | |
947 | for (i = 0; i < N_DRIVE; i++) { | |
948 | drive = (saved_drive + i + 1) % N_DRIVE; | |
949 | if (UDRS->fd_ref == 0 || UDP->select_delay != 0) | |
950 | continue; /* skip closed drives */ | |
951 | set_fdc(drive); | |
952 | if (!(set_dor(fdc, ~3, UNIT(drive) | (0x10 << UNIT(drive))) & | |
953 | (0x10 << UNIT(drive)))) | |
954 | /* switch the motor off again, if it was off to | |
955 | * begin with */ | |
956 | set_dor(fdc, ~(0x10 << UNIT(drive)), 0); | |
957 | } | |
958 | set_fdc(saved_drive); | |
959 | } | |
960 | ||
961 | static void empty(void) | |
962 | { | |
963 | } | |
964 | ||
75ddb38f TH |
965 | static void (*floppy_work_fn)(void); |
966 | ||
967 | static void floppy_work_workfn(struct work_struct *work) | |
968 | { | |
969 | floppy_work_fn(); | |
970 | } | |
971 | ||
972 | static DECLARE_WORK(floppy_work, floppy_work_workfn); | |
1da177e4 | 973 | |
48c8cee6 | 974 | static void schedule_bh(void (*handler)(void)) |
1da177e4 | 975 | { |
070ad7e7 JK |
976 | WARN_ON(work_pending(&floppy_work)); |
977 | ||
75ddb38f | 978 | floppy_work_fn = handler; |
070ad7e7 | 979 | queue_work(floppy_wq, &floppy_work); |
1da177e4 LT |
980 | } |
981 | ||
75ddb38f TH |
982 | static void (*fd_timer_fn)(void) = NULL; |
983 | ||
984 | static void fd_timer_workfn(struct work_struct *work) | |
985 | { | |
986 | fd_timer_fn(); | |
987 | } | |
988 | ||
989 | static DECLARE_DELAYED_WORK(fd_timer, fd_timer_workfn); | |
1da177e4 LT |
990 | |
991 | static void cancel_activity(void) | |
992 | { | |
1da177e4 | 993 | do_floppy = NULL; |
070ad7e7 JK |
994 | cancel_delayed_work_sync(&fd_timer); |
995 | cancel_work_sync(&floppy_work); | |
1da177e4 LT |
996 | } |
997 | ||
998 | /* this function makes sure that the disk stays in the drive during the | |
999 | * transfer */ | |
75ddb38f | 1000 | static void fd_watchdog(void) |
1da177e4 | 1001 | { |
87f530d8 | 1002 | debug_dcl(DP->flags, "calling disk change from watchdog\n"); |
1da177e4 LT |
1003 | |
1004 | if (disk_change(current_drive)) { | |
1005 | DPRINT("disk removed during i/o\n"); | |
1006 | cancel_activity(); | |
1007 | cont->done(0); | |
1008 | reset_fdc(); | |
1009 | } else { | |
070ad7e7 | 1010 | cancel_delayed_work(&fd_timer); |
75ddb38f | 1011 | fd_timer_fn = fd_watchdog; |
070ad7e7 | 1012 | queue_delayed_work(floppy_wq, &fd_timer, HZ / 10); |
1da177e4 LT |
1013 | } |
1014 | } | |
1015 | ||
1016 | static void main_command_interrupt(void) | |
1017 | { | |
070ad7e7 | 1018 | cancel_delayed_work(&fd_timer); |
1da177e4 LT |
1019 | cont->interrupt(); |
1020 | } | |
1021 | ||
1022 | /* waits for a delay (spinup or select) to pass */ | |
75ddb38f TH |
1023 | static int fd_wait_for_completion(unsigned long expires, |
1024 | void (*function)(void)) | |
1da177e4 LT |
1025 | { |
1026 | if (FDCS->reset) { | |
1027 | reset_fdc(); /* do the reset during sleep to win time | |
1028 | * if we don't need to sleep, it's a good | |
1029 | * occasion anyways */ | |
1030 | return 1; | |
1031 | } | |
1032 | ||
070ad7e7 JK |
1033 | if (time_before(jiffies, expires)) { |
1034 | cancel_delayed_work(&fd_timer); | |
75ddb38f | 1035 | fd_timer_fn = function; |
070ad7e7 | 1036 | queue_delayed_work(floppy_wq, &fd_timer, expires - jiffies); |
1da177e4 LT |
1037 | return 1; |
1038 | } | |
1039 | return 0; | |
1040 | } | |
1041 | ||
1da177e4 LT |
1042 | static void setup_DMA(void) |
1043 | { | |
1044 | unsigned long f; | |
1045 | ||
1da177e4 LT |
1046 | if (raw_cmd->length == 0) { |
1047 | int i; | |
1048 | ||
b46df356 | 1049 | pr_info("zero dma transfer size:"); |
1da177e4 | 1050 | for (i = 0; i < raw_cmd->cmd_count; i++) |
b46df356 JP |
1051 | pr_cont("%x,", raw_cmd->cmd[i]); |
1052 | pr_cont("\n"); | |
1da177e4 LT |
1053 | cont->done(0); |
1054 | FDCS->reset = 1; | |
1055 | return; | |
1056 | } | |
1057 | if (((unsigned long)raw_cmd->kernel_data) % 512) { | |
b46df356 | 1058 | pr_info("non aligned address: %p\n", raw_cmd->kernel_data); |
1da177e4 LT |
1059 | cont->done(0); |
1060 | FDCS->reset = 1; | |
1061 | return; | |
1062 | } | |
1da177e4 LT |
1063 | f = claim_dma_lock(); |
1064 | fd_disable_dma(); | |
1065 | #ifdef fd_dma_setup | |
1066 | if (fd_dma_setup(raw_cmd->kernel_data, raw_cmd->length, | |
1067 | (raw_cmd->flags & FD_RAW_READ) ? | |
1068 | DMA_MODE_READ : DMA_MODE_WRITE, FDCS->address) < 0) { | |
1069 | release_dma_lock(f); | |
1070 | cont->done(0); | |
1071 | FDCS->reset = 1; | |
1072 | return; | |
1073 | } | |
1074 | release_dma_lock(f); | |
1075 | #else | |
1076 | fd_clear_dma_ff(); | |
1077 | fd_cacheflush(raw_cmd->kernel_data, raw_cmd->length); | |
1078 | fd_set_dma_mode((raw_cmd->flags & FD_RAW_READ) ? | |
1079 | DMA_MODE_READ : DMA_MODE_WRITE); | |
1080 | fd_set_dma_addr(raw_cmd->kernel_data); | |
1081 | fd_set_dma_count(raw_cmd->length); | |
1082 | virtual_dma_port = FDCS->address; | |
1083 | fd_enable_dma(); | |
1084 | release_dma_lock(f); | |
1085 | #endif | |
1da177e4 LT |
1086 | } |
1087 | ||
1088 | static void show_floppy(void); | |
1089 | ||
1090 | /* waits until the fdc becomes ready */ | |
1091 | static int wait_til_ready(void) | |
1092 | { | |
06f748c4 JJ |
1093 | int status; |
1094 | int counter; | |
1095 | ||
1da177e4 LT |
1096 | if (FDCS->reset) |
1097 | return -1; | |
1098 | for (counter = 0; counter < 10000; counter++) { | |
1099 | status = fd_inb(FD_STATUS); | |
1100 | if (status & STATUS_READY) | |
1101 | return status; | |
1102 | } | |
29f1c784 | 1103 | if (initialized) { |
1da177e4 LT |
1104 | DPRINT("Getstatus times out (%x) on fdc %d\n", status, fdc); |
1105 | show_floppy(); | |
1106 | } | |
1107 | FDCS->reset = 1; | |
1108 | return -1; | |
1109 | } | |
1110 | ||
1111 | /* sends a command byte to the fdc */ | |
1112 | static int output_byte(char byte) | |
1113 | { | |
d7b2b2ec | 1114 | int status = wait_til_ready(); |
1da177e4 | 1115 | |
d7b2b2ec | 1116 | if (status < 0) |
1da177e4 | 1117 | return -1; |
57584c5a JP |
1118 | |
1119 | if (is_ready_state(status)) { | |
1da177e4 | 1120 | fd_outb(byte, FD_DATA); |
1da177e4 LT |
1121 | output_log[output_log_pos].data = byte; |
1122 | output_log[output_log_pos].status = status; | |
1123 | output_log[output_log_pos].jiffies = jiffies; | |
1124 | output_log_pos = (output_log_pos + 1) % OLOGSIZE; | |
1da177e4 LT |
1125 | return 0; |
1126 | } | |
1127 | FDCS->reset = 1; | |
29f1c784 | 1128 | if (initialized) { |
1da177e4 LT |
1129 | DPRINT("Unable to send byte %x to FDC. Fdc=%x Status=%x\n", |
1130 | byte, fdc, status); | |
1131 | show_floppy(); | |
1132 | } | |
1133 | return -1; | |
1134 | } | |
1135 | ||
1da177e4 LT |
1136 | /* gets the response from the fdc */ |
1137 | static int result(void) | |
1138 | { | |
06f748c4 JJ |
1139 | int i; |
1140 | int status = 0; | |
1da177e4 LT |
1141 | |
1142 | for (i = 0; i < MAX_REPLIES; i++) { | |
d7b2b2ec JP |
1143 | status = wait_til_ready(); |
1144 | if (status < 0) | |
1da177e4 LT |
1145 | break; |
1146 | status &= STATUS_DIR | STATUS_READY | STATUS_BUSY | STATUS_DMA; | |
1147 | if ((status & ~STATUS_BUSY) == STATUS_READY) { | |
1da177e4 LT |
1148 | resultjiffies = jiffies; |
1149 | resultsize = i; | |
1da177e4 LT |
1150 | return i; |
1151 | } | |
1152 | if (status == (STATUS_DIR | STATUS_READY | STATUS_BUSY)) | |
1153 | reply_buffer[i] = fd_inb(FD_DATA); | |
1154 | else | |
1155 | break; | |
1156 | } | |
29f1c784 JP |
1157 | if (initialized) { |
1158 | DPRINT("get result error. Fdc=%d Last status=%x Read bytes=%d\n", | |
1159 | fdc, status, i); | |
1da177e4 LT |
1160 | show_floppy(); |
1161 | } | |
1162 | FDCS->reset = 1; | |
1163 | return -1; | |
1164 | } | |
1165 | ||
1166 | #define MORE_OUTPUT -2 | |
1167 | /* does the fdc need more output? */ | |
1168 | static int need_more_output(void) | |
1169 | { | |
d7b2b2ec | 1170 | int status = wait_til_ready(); |
06f748c4 | 1171 | |
d7b2b2ec | 1172 | if (status < 0) |
1da177e4 | 1173 | return -1; |
57584c5a JP |
1174 | |
1175 | if (is_ready_state(status)) | |
1da177e4 | 1176 | return MORE_OUTPUT; |
57584c5a | 1177 | |
1da177e4 LT |
1178 | return result(); |
1179 | } | |
1180 | ||
1181 | /* Set perpendicular mode as required, based on data rate, if supported. | |
1182 | * 82077 Now tested. 1Mbps data rate only possible with 82077-1. | |
1183 | */ | |
be7a12bb | 1184 | static void perpendicular_mode(void) |
1da177e4 LT |
1185 | { |
1186 | unsigned char perp_mode; | |
1187 | ||
1188 | if (raw_cmd->rate & 0x40) { | |
1189 | switch (raw_cmd->rate & 3) { | |
1190 | case 0: | |
1191 | perp_mode = 2; | |
1192 | break; | |
1193 | case 3: | |
1194 | perp_mode = 3; | |
1195 | break; | |
1196 | default: | |
1197 | DPRINT("Invalid data rate for perpendicular mode!\n"); | |
1198 | cont->done(0); | |
bb57f0c6 JP |
1199 | FDCS->reset = 1; |
1200 | /* | |
1201 | * convenient way to return to | |
1202 | * redo without too much hassle | |
1203 | * (deep stack et al.) | |
1204 | */ | |
1da177e4 LT |
1205 | return; |
1206 | } | |
1207 | } else | |
1208 | perp_mode = 0; | |
1209 | ||
1210 | if (FDCS->perp_mode == perp_mode) | |
1211 | return; | |
1212 | if (FDCS->version >= FDC_82077_ORIG) { | |
1213 | output_byte(FD_PERPENDICULAR); | |
1214 | output_byte(perp_mode); | |
1215 | FDCS->perp_mode = perp_mode; | |
1216 | } else if (perp_mode) { | |
1217 | DPRINT("perpendicular mode not supported by this FDC.\n"); | |
1218 | } | |
1219 | } /* perpendicular_mode */ | |
1220 | ||
1221 | static int fifo_depth = 0xa; | |
1222 | static int no_fifo; | |
1223 | ||
1224 | static int fdc_configure(void) | |
1225 | { | |
1226 | /* Turn on FIFO */ | |
1227 | output_byte(FD_CONFIGURE); | |
1228 | if (need_more_output() != MORE_OUTPUT) | |
1229 | return 0; | |
1230 | output_byte(0); | |
1231 | output_byte(0x10 | (no_fifo & 0x20) | (fifo_depth & 0xf)); | |
1232 | output_byte(0); /* pre-compensation from track | |
1233 | 0 upwards */ | |
1234 | return 1; | |
1235 | } | |
1236 | ||
1237 | #define NOMINAL_DTR 500 | |
1238 | ||
1239 | /* Issue a "SPECIFY" command to set the step rate time, head unload time, | |
1240 | * head load time, and DMA disable flag to values needed by floppy. | |
1241 | * | |
1242 | * The value "dtr" is the data transfer rate in Kbps. It is needed | |
1243 | * to account for the data rate-based scaling done by the 82072 and 82077 | |
1244 | * FDC types. This parameter is ignored for other types of FDCs (i.e. | |
1245 | * 8272a). | |
1246 | * | |
1247 | * Note that changing the data transfer rate has a (probably deleterious) | |
1248 | * effect on the parameters subject to scaling for 82072/82077 FDCs, so | |
1249 | * fdc_specify is called again after each data transfer rate | |
1250 | * change. | |
1251 | * | |
1252 | * srt: 1000 to 16000 in microseconds | |
1253 | * hut: 16 to 240 milliseconds | |
1254 | * hlt: 2 to 254 milliseconds | |
1255 | * | |
1256 | * These values are rounded up to the next highest available delay time. | |
1257 | */ | |
1258 | static void fdc_specify(void) | |
1259 | { | |
06f748c4 JJ |
1260 | unsigned char spec1; |
1261 | unsigned char spec2; | |
1262 | unsigned long srt; | |
1263 | unsigned long hlt; | |
1264 | unsigned long hut; | |
1da177e4 LT |
1265 | unsigned long dtr = NOMINAL_DTR; |
1266 | unsigned long scale_dtr = NOMINAL_DTR; | |
1267 | int hlt_max_code = 0x7f; | |
1268 | int hut_max_code = 0xf; | |
1269 | ||
1270 | if (FDCS->need_configure && FDCS->version >= FDC_82072A) { | |
1271 | fdc_configure(); | |
1272 | FDCS->need_configure = 0; | |
1da177e4 LT |
1273 | } |
1274 | ||
1275 | switch (raw_cmd->rate & 0x03) { | |
1276 | case 3: | |
1277 | dtr = 1000; | |
1278 | break; | |
1279 | case 1: | |
1280 | dtr = 300; | |
1281 | if (FDCS->version >= FDC_82078) { | |
1282 | /* chose the default rate table, not the one | |
1283 | * where 1 = 2 Mbps */ | |
1284 | output_byte(FD_DRIVESPEC); | |
1285 | if (need_more_output() == MORE_OUTPUT) { | |
1286 | output_byte(UNIT(current_drive)); | |
1287 | output_byte(0xc0); | |
1288 | } | |
1289 | } | |
1290 | break; | |
1291 | case 2: | |
1292 | dtr = 250; | |
1293 | break; | |
1294 | } | |
1295 | ||
1296 | if (FDCS->version >= FDC_82072) { | |
1297 | scale_dtr = dtr; | |
1298 | hlt_max_code = 0x00; /* 0==256msec*dtr0/dtr (not linear!) */ | |
1299 | hut_max_code = 0x0; /* 0==256msec*dtr0/dtr (not linear!) */ | |
1300 | } | |
1301 | ||
1302 | /* Convert step rate from microseconds to milliseconds and 4 bits */ | |
061837bc | 1303 | srt = 16 - DIV_ROUND_UP(DP->srt * scale_dtr / 1000, NOMINAL_DTR); |
a81ee544 | 1304 | if (slow_floppy) |
1da177e4 | 1305 | srt = srt / 4; |
a81ee544 | 1306 | |
1da177e4 LT |
1307 | SUPBOUND(srt, 0xf); |
1308 | INFBOUND(srt, 0); | |
1309 | ||
061837bc | 1310 | hlt = DIV_ROUND_UP(DP->hlt * scale_dtr / 2, NOMINAL_DTR); |
1da177e4 LT |
1311 | if (hlt < 0x01) |
1312 | hlt = 0x01; | |
1313 | else if (hlt > 0x7f) | |
1314 | hlt = hlt_max_code; | |
1315 | ||
061837bc | 1316 | hut = DIV_ROUND_UP(DP->hut * scale_dtr / 16, NOMINAL_DTR); |
1da177e4 LT |
1317 | if (hut < 0x1) |
1318 | hut = 0x1; | |
1319 | else if (hut > 0xf) | |
1320 | hut = hut_max_code; | |
1321 | ||
1322 | spec1 = (srt << 4) | hut; | |
1323 | spec2 = (hlt << 1) | (use_virtual_dma & 1); | |
1324 | ||
1325 | /* If these parameters did not change, just return with success */ | |
1326 | if (FDCS->spec1 != spec1 || FDCS->spec2 != spec2) { | |
1327 | /* Go ahead and set spec1 and spec2 */ | |
1328 | output_byte(FD_SPECIFY); | |
1329 | output_byte(FDCS->spec1 = spec1); | |
1330 | output_byte(FDCS->spec2 = spec2); | |
1331 | } | |
1332 | } /* fdc_specify */ | |
1333 | ||
1334 | /* Set the FDC's data transfer rate on behalf of the specified drive. | |
1335 | * NOTE: with 82072/82077 FDCs, changing the data rate requires a reissue | |
1336 | * of the specify command (i.e. using the fdc_specify function). | |
1337 | */ | |
1338 | static int fdc_dtr(void) | |
1339 | { | |
1340 | /* If data rate not already set to desired value, set it. */ | |
1341 | if ((raw_cmd->rate & 3) == FDCS->dtr) | |
1342 | return 0; | |
1343 | ||
1344 | /* Set dtr */ | |
1345 | fd_outb(raw_cmd->rate & 3, FD_DCR); | |
1346 | ||
1347 | /* TODO: some FDC/drive combinations (C&T 82C711 with TEAC 1.2MB) | |
1348 | * need a stabilization period of several milliseconds to be | |
1349 | * enforced after data rate changes before R/W operations. | |
1350 | * Pause 5 msec to avoid trouble. (Needs to be 2 jiffies) | |
1351 | */ | |
1352 | FDCS->dtr = raw_cmd->rate & 3; | |
75ddb38f | 1353 | return fd_wait_for_completion(jiffies + 2UL * HZ / 100, floppy_ready); |
1da177e4 LT |
1354 | } /* fdc_dtr */ |
1355 | ||
1356 | static void tell_sector(void) | |
1357 | { | |
b46df356 JP |
1358 | pr_cont(": track %d, head %d, sector %d, size %d", |
1359 | R_TRACK, R_HEAD, R_SECTOR, R_SIZECODE); | |
1da177e4 LT |
1360 | } /* tell_sector */ |
1361 | ||
b46df356 JP |
1362 | static void print_errors(void) |
1363 | { | |
1364 | DPRINT(""); | |
1365 | if (ST0 & ST0_ECE) { | |
1366 | pr_cont("Recalibrate failed!"); | |
1367 | } else if (ST2 & ST2_CRC) { | |
1368 | pr_cont("data CRC error"); | |
1369 | tell_sector(); | |
1370 | } else if (ST1 & ST1_CRC) { | |
1371 | pr_cont("CRC error"); | |
1372 | tell_sector(); | |
1373 | } else if ((ST1 & (ST1_MAM | ST1_ND)) || | |
1374 | (ST2 & ST2_MAM)) { | |
1375 | if (!probing) { | |
1376 | pr_cont("sector not found"); | |
1377 | tell_sector(); | |
1378 | } else | |
1379 | pr_cont("probe failed..."); | |
1380 | } else if (ST2 & ST2_WC) { /* seek error */ | |
1381 | pr_cont("wrong cylinder"); | |
1382 | } else if (ST2 & ST2_BC) { /* cylinder marked as bad */ | |
1383 | pr_cont("bad cylinder"); | |
1384 | } else { | |
1385 | pr_cont("unknown error. ST[0..2] are: 0x%x 0x%x 0x%x", | |
1386 | ST0, ST1, ST2); | |
1387 | tell_sector(); | |
1388 | } | |
1389 | pr_cont("\n"); | |
1390 | } | |
1391 | ||
1da177e4 LT |
1392 | /* |
1393 | * OK, this error interpreting routine is called after a | |
1394 | * DMA read/write has succeeded | |
1395 | * or failed, so we check the results, and copy any buffers. | |
1396 | * hhb: Added better error reporting. | |
1397 | * ak: Made this into a separate routine. | |
1398 | */ | |
1399 | static int interpret_errors(void) | |
1400 | { | |
1401 | char bad; | |
1402 | ||
1403 | if (inr != 7) { | |
891eda80 | 1404 | DPRINT("-- FDC reply error\n"); |
1da177e4 LT |
1405 | FDCS->reset = 1; |
1406 | return 1; | |
1407 | } | |
1408 | ||
1409 | /* check IC to find cause of interrupt */ | |
1410 | switch (ST0 & ST0_INTR) { | |
1411 | case 0x40: /* error occurred during command execution */ | |
1412 | if (ST1 & ST1_EOC) | |
1413 | return 0; /* occurs with pseudo-DMA */ | |
1414 | bad = 1; | |
1415 | if (ST1 & ST1_WP) { | |
1416 | DPRINT("Drive is write protected\n"); | |
e0298536 | 1417 | clear_bit(FD_DISK_WRITABLE_BIT, &DRS->flags); |
1da177e4 LT |
1418 | cont->done(0); |
1419 | bad = 2; | |
1420 | } else if (ST1 & ST1_ND) { | |
e0298536 | 1421 | set_bit(FD_NEED_TWADDLE_BIT, &DRS->flags); |
1da177e4 LT |
1422 | } else if (ST1 & ST1_OR) { |
1423 | if (DP->flags & FTD_MSG) | |
1424 | DPRINT("Over/Underrun - retrying\n"); | |
1425 | bad = 0; | |
1426 | } else if (*errors >= DP->max_errors.reporting) { | |
b46df356 | 1427 | print_errors(); |
1da177e4 LT |
1428 | } |
1429 | if (ST2 & ST2_WC || ST2 & ST2_BC) | |
1430 | /* wrong cylinder => recal */ | |
1431 | DRS->track = NEED_2_RECAL; | |
1432 | return bad; | |
1433 | case 0x80: /* invalid command given */ | |
1434 | DPRINT("Invalid FDC command given!\n"); | |
1435 | cont->done(0); | |
1436 | return 2; | |
1437 | case 0xc0: | |
1438 | DPRINT("Abnormal termination caused by polling\n"); | |
1439 | cont->error(); | |
1440 | return 2; | |
1441 | default: /* (0) Normal command termination */ | |
1442 | return 0; | |
1443 | } | |
1444 | } | |
1445 | ||
1446 | /* | |
1447 | * This routine is called when everything should be correctly set up | |
1448 | * for the transfer (i.e. floppy motor is on, the correct floppy is | |
1449 | * selected, and the head is sitting on the right track). | |
1450 | */ | |
1451 | static void setup_rw_floppy(void) | |
1452 | { | |
06f748c4 JJ |
1453 | int i; |
1454 | int r; | |
1455 | int flags; | |
1456 | int dflags; | |
1da177e4 | 1457 | unsigned long ready_date; |
75ddb38f | 1458 | void (*function)(void); |
1da177e4 LT |
1459 | |
1460 | flags = raw_cmd->flags; | |
1461 | if (flags & (FD_RAW_READ | FD_RAW_WRITE)) | |
1462 | flags |= FD_RAW_INTR; | |
1463 | ||
1464 | if ((flags & FD_RAW_SPIN) && !(flags & FD_RAW_NO_MOTOR)) { | |
1465 | ready_date = DRS->spinup_date + DP->spinup; | |
1466 | /* If spinup will take a long time, rerun scandrives | |
1467 | * again just before spinup completion. Beware that | |
1468 | * after scandrives, we must again wait for selection. | |
1469 | */ | |
50297cbf | 1470 | if (time_after(ready_date, jiffies + DP->select_delay)) { |
1da177e4 | 1471 | ready_date -= DP->select_delay; |
75ddb38f | 1472 | function = floppy_start; |
1da177e4 | 1473 | } else |
75ddb38f | 1474 | function = setup_rw_floppy; |
1da177e4 LT |
1475 | |
1476 | /* wait until the floppy is spinning fast enough */ | |
1477 | if (fd_wait_for_completion(ready_date, function)) | |
1478 | return; | |
1479 | } | |
1480 | dflags = DRS->flags; | |
1481 | ||
1482 | if ((flags & FD_RAW_READ) || (flags & FD_RAW_WRITE)) | |
1483 | setup_DMA(); | |
1484 | ||
1485 | if (flags & FD_RAW_INTR) | |
1486 | do_floppy = main_command_interrupt; | |
1487 | ||
1488 | r = 0; | |
1489 | for (i = 0; i < raw_cmd->cmd_count; i++) | |
1490 | r |= output_byte(raw_cmd->cmd[i]); | |
1491 | ||
ded2863d | 1492 | debugt(__func__, "rw_command"); |
1da177e4 LT |
1493 | |
1494 | if (r) { | |
1495 | cont->error(); | |
1496 | reset_fdc(); | |
1497 | return; | |
1498 | } | |
1499 | ||
1500 | if (!(flags & FD_RAW_INTR)) { | |
1501 | inr = result(); | |
1502 | cont->interrupt(); | |
1503 | } else if (flags & FD_RAW_NEED_DISK) | |
75ddb38f | 1504 | fd_watchdog(); |
1da177e4 LT |
1505 | } |
1506 | ||
1507 | static int blind_seek; | |
1508 | ||
1509 | /* | |
1510 | * This is the routine called after every seek (or recalibrate) interrupt | |
1511 | * from the floppy controller. | |
1512 | */ | |
1513 | static void seek_interrupt(void) | |
1514 | { | |
ded2863d | 1515 | debugt(__func__, ""); |
1da177e4 LT |
1516 | if (inr != 2 || (ST0 & 0xF8) != 0x20) { |
1517 | DPRINT("seek failed\n"); | |
1518 | DRS->track = NEED_2_RECAL; | |
1519 | cont->error(); | |
1520 | cont->redo(); | |
1521 | return; | |
1522 | } | |
1523 | if (DRS->track >= 0 && DRS->track != ST1 && !blind_seek) { | |
87f530d8 JP |
1524 | debug_dcl(DP->flags, |
1525 | "clearing NEWCHANGE flag because of effective seek\n"); | |
1526 | debug_dcl(DP->flags, "jiffies=%lu\n", jiffies); | |
e0298536 JP |
1527 | clear_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags); |
1528 | /* effective seek */ | |
1da177e4 LT |
1529 | DRS->select_date = jiffies; |
1530 | } | |
1531 | DRS->track = ST1; | |
1532 | floppy_ready(); | |
1533 | } | |
1534 | ||
1535 | static void check_wp(void) | |
1536 | { | |
e0298536 JP |
1537 | if (test_bit(FD_VERIFY_BIT, &DRS->flags)) { |
1538 | /* check write protection */ | |
1da177e4 LT |
1539 | output_byte(FD_GETSTATUS); |
1540 | output_byte(UNIT(current_drive)); | |
1541 | if (result() != 1) { | |
1542 | FDCS->reset = 1; | |
1543 | return; | |
1544 | } | |
e0298536 JP |
1545 | clear_bit(FD_VERIFY_BIT, &DRS->flags); |
1546 | clear_bit(FD_NEED_TWADDLE_BIT, &DRS->flags); | |
87f530d8 JP |
1547 | debug_dcl(DP->flags, |
1548 | "checking whether disk is write protected\n"); | |
1549 | debug_dcl(DP->flags, "wp=%x\n", ST3 & 0x40); | |
1da177e4 | 1550 | if (!(ST3 & 0x40)) |
e0298536 | 1551 | set_bit(FD_DISK_WRITABLE_BIT, &DRS->flags); |
1da177e4 | 1552 | else |
e0298536 | 1553 | clear_bit(FD_DISK_WRITABLE_BIT, &DRS->flags); |
1da177e4 LT |
1554 | } |
1555 | } | |
1556 | ||
1557 | static void seek_floppy(void) | |
1558 | { | |
1559 | int track; | |
1560 | ||
1561 | blind_seek = 0; | |
1562 | ||
ded2863d | 1563 | debug_dcl(DP->flags, "calling disk change from %s\n", __func__); |
1da177e4 | 1564 | |
e0298536 | 1565 | if (!test_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags) && |
1da177e4 LT |
1566 | disk_change(current_drive) && (raw_cmd->flags & FD_RAW_NEED_DISK)) { |
1567 | /* the media changed flag should be cleared after the seek. | |
1568 | * If it isn't, this means that there is really no disk in | |
1569 | * the drive. | |
1570 | */ | |
e0298536 | 1571 | set_bit(FD_DISK_CHANGED_BIT, &DRS->flags); |
1da177e4 LT |
1572 | cont->done(0); |
1573 | cont->redo(); | |
1574 | return; | |
1575 | } | |
1576 | if (DRS->track <= NEED_1_RECAL) { | |
1577 | recalibrate_floppy(); | |
1578 | return; | |
e0298536 | 1579 | } else if (test_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags) && |
1da177e4 LT |
1580 | (raw_cmd->flags & FD_RAW_NEED_DISK) && |
1581 | (DRS->track <= NO_TRACK || DRS->track == raw_cmd->track)) { | |
1582 | /* we seek to clear the media-changed condition. Does anybody | |
1583 | * know a more elegant way, which works on all drives? */ | |
1584 | if (raw_cmd->track) | |
1585 | track = raw_cmd->track - 1; | |
1586 | else { | |
1587 | if (DP->flags & FD_SILENT_DCL_CLEAR) { | |
1588 | set_dor(fdc, ~(0x10 << UNIT(current_drive)), 0); | |
1589 | blind_seek = 1; | |
1590 | raw_cmd->flags |= FD_RAW_NEED_SEEK; | |
1591 | } | |
1592 | track = 1; | |
1593 | } | |
1594 | } else { | |
1595 | check_wp(); | |
1596 | if (raw_cmd->track != DRS->track && | |
1597 | (raw_cmd->flags & FD_RAW_NEED_SEEK)) | |
1598 | track = raw_cmd->track; | |
1599 | else { | |
1600 | setup_rw_floppy(); | |
1601 | return; | |
1602 | } | |
1603 | } | |
1604 | ||
1605 | do_floppy = seek_interrupt; | |
1606 | output_byte(FD_SEEK); | |
1607 | output_byte(UNIT(current_drive)); | |
2300f90e JP |
1608 | if (output_byte(track) < 0) { |
1609 | reset_fdc(); | |
1610 | return; | |
1611 | } | |
ded2863d | 1612 | debugt(__func__, ""); |
1da177e4 LT |
1613 | } |
1614 | ||
1615 | static void recal_interrupt(void) | |
1616 | { | |
ded2863d | 1617 | debugt(__func__, ""); |
1da177e4 LT |
1618 | if (inr != 2) |
1619 | FDCS->reset = 1; | |
1620 | else if (ST0 & ST0_ECE) { | |
1621 | switch (DRS->track) { | |
1622 | case NEED_1_RECAL: | |
ded2863d | 1623 | debugt(__func__, "need 1 recal"); |
1da177e4 LT |
1624 | /* after a second recalibrate, we still haven't |
1625 | * reached track 0. Probably no drive. Raise an | |
1626 | * error, as failing immediately might upset | |
1627 | * computers possessed by the Devil :-) */ | |
1628 | cont->error(); | |
1629 | cont->redo(); | |
1630 | return; | |
1631 | case NEED_2_RECAL: | |
ded2863d | 1632 | debugt(__func__, "need 2 recal"); |
1da177e4 LT |
1633 | /* If we already did a recalibrate, |
1634 | * and we are not at track 0, this | |
1635 | * means we have moved. (The only way | |
1636 | * not to move at recalibration is to | |
1637 | * be already at track 0.) Clear the | |
1638 | * new change flag */ | |
87f530d8 JP |
1639 | debug_dcl(DP->flags, |
1640 | "clearing NEWCHANGE flag because of second recalibrate\n"); | |
1da177e4 | 1641 | |
e0298536 | 1642 | clear_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags); |
1da177e4 LT |
1643 | DRS->select_date = jiffies; |
1644 | /* fall through */ | |
1645 | default: | |
ded2863d | 1646 | debugt(__func__, "default"); |
1da177e4 LT |
1647 | /* Recalibrate moves the head by at |
1648 | * most 80 steps. If after one | |
1649 | * recalibrate we don't have reached | |
1650 | * track 0, this might mean that we | |
1651 | * started beyond track 80. Try | |
1652 | * again. */ | |
1653 | DRS->track = NEED_1_RECAL; | |
1654 | break; | |
1655 | } | |
1656 | } else | |
1657 | DRS->track = ST1; | |
1658 | floppy_ready(); | |
1659 | } | |
1660 | ||
1661 | static void print_result(char *message, int inr) | |
1662 | { | |
1663 | int i; | |
1664 | ||
1665 | DPRINT("%s ", message); | |
1666 | if (inr >= 0) | |
1667 | for (i = 0; i < inr; i++) | |
b46df356 JP |
1668 | pr_cont("repl[%d]=%x ", i, reply_buffer[i]); |
1669 | pr_cont("\n"); | |
1da177e4 LT |
1670 | } |
1671 | ||
1672 | /* interrupt handler. Note that this can be called externally on the Sparc */ | |
7d12e780 | 1673 | irqreturn_t floppy_interrupt(int irq, void *dev_id) |
1da177e4 | 1674 | { |
1da177e4 LT |
1675 | int do_print; |
1676 | unsigned long f; | |
06f748c4 | 1677 | void (*handler)(void) = do_floppy; |
1da177e4 LT |
1678 | |
1679 | lasthandler = handler; | |
1680 | interruptjiffies = jiffies; | |
1681 | ||
1682 | f = claim_dma_lock(); | |
1683 | fd_disable_dma(); | |
1684 | release_dma_lock(f); | |
1685 | ||
1da177e4 LT |
1686 | do_floppy = NULL; |
1687 | if (fdc >= N_FDC || FDCS->address == -1) { | |
1688 | /* we don't even know which FDC is the culprit */ | |
b46df356 JP |
1689 | pr_info("DOR0=%x\n", fdc_state[0].dor); |
1690 | pr_info("floppy interrupt on bizarre fdc %d\n", fdc); | |
1ebddd85 | 1691 | pr_info("handler=%pf\n", handler); |
275176bc | 1692 | is_alive(__func__, "bizarre fdc"); |
1da177e4 LT |
1693 | return IRQ_NONE; |
1694 | } | |
1695 | ||
1696 | FDCS->reset = 0; | |
1697 | /* We have to clear the reset flag here, because apparently on boxes | |
1698 | * with level triggered interrupts (PS/2, Sparc, ...), it is needed to | |
1699 | * emit SENSEI's to clear the interrupt line. And FDCS->reset blocks the | |
1700 | * emission of the SENSEI's. | |
1701 | * It is OK to emit floppy commands because we are in an interrupt | |
1702 | * handler here, and thus we have to fear no interference of other | |
1703 | * activity. | |
1704 | */ | |
1705 | ||
29f1c784 | 1706 | do_print = !handler && print_unex && initialized; |
1da177e4 LT |
1707 | |
1708 | inr = result(); | |
1709 | if (do_print) | |
1710 | print_result("unexpected interrupt", inr); | |
1711 | if (inr == 0) { | |
1712 | int max_sensei = 4; | |
1713 | do { | |
1714 | output_byte(FD_SENSEI); | |
1715 | inr = result(); | |
1716 | if (do_print) | |
1717 | print_result("sensei", inr); | |
1718 | max_sensei--; | |
c529730a JP |
1719 | } while ((ST0 & 0x83) != UNIT(current_drive) && |
1720 | inr == 2 && max_sensei); | |
1da177e4 LT |
1721 | } |
1722 | if (!handler) { | |
1723 | FDCS->reset = 1; | |
1724 | return IRQ_NONE; | |
1725 | } | |
1726 | schedule_bh(handler); | |
275176bc | 1727 | is_alive(__func__, "normal interrupt end"); |
1da177e4 LT |
1728 | |
1729 | /* FIXME! Was it really for us? */ | |
1730 | return IRQ_HANDLED; | |
1731 | } | |
1732 | ||
1733 | static void recalibrate_floppy(void) | |
1734 | { | |
ded2863d | 1735 | debugt(__func__, ""); |
1da177e4 LT |
1736 | do_floppy = recal_interrupt; |
1737 | output_byte(FD_RECALIBRATE); | |
15b2630c | 1738 | if (output_byte(UNIT(current_drive)) < 0) |
2300f90e | 1739 | reset_fdc(); |
1da177e4 LT |
1740 | } |
1741 | ||
1742 | /* | |
1743 | * Must do 4 FD_SENSEIs after reset because of ``drive polling''. | |
1744 | */ | |
1745 | static void reset_interrupt(void) | |
1746 | { | |
ded2863d | 1747 | debugt(__func__, ""); |
1da177e4 LT |
1748 | result(); /* get the status ready for set_fdc */ |
1749 | if (FDCS->reset) { | |
1ebddd85 | 1750 | pr_info("reset set in interrupt, calling %pf\n", cont->error); |
1da177e4 LT |
1751 | cont->error(); /* a reset just after a reset. BAD! */ |
1752 | } | |
1753 | cont->redo(); | |
1754 | } | |
1755 | ||
1756 | /* | |
1757 | * reset is done by pulling bit 2 of DOR low for a while (old FDCs), | |
1758 | * or by setting the self clearing bit 7 of STATUS (newer FDCs) | |
1759 | */ | |
1760 | static void reset_fdc(void) | |
1761 | { | |
1762 | unsigned long flags; | |
1763 | ||
1764 | do_floppy = reset_interrupt; | |
1765 | FDCS->reset = 0; | |
1766 | reset_fdc_info(0); | |
1767 | ||
1768 | /* Pseudo-DMA may intercept 'reset finished' interrupt. */ | |
1769 | /* Irrelevant for systems with true DMA (i386). */ | |
1770 | ||
1771 | flags = claim_dma_lock(); | |
1772 | fd_disable_dma(); | |
1773 | release_dma_lock(flags); | |
1774 | ||
1775 | if (FDCS->version >= FDC_82072A) | |
1776 | fd_outb(0x80 | (FDCS->dtr & 3), FD_STATUS); | |
1777 | else { | |
1778 | fd_outb(FDCS->dor & ~0x04, FD_DOR); | |
1779 | udelay(FD_RESET_DELAY); | |
1780 | fd_outb(FDCS->dor, FD_DOR); | |
1781 | } | |
1782 | } | |
1783 | ||
1784 | static void show_floppy(void) | |
1785 | { | |
1786 | int i; | |
1787 | ||
b46df356 JP |
1788 | pr_info("\n"); |
1789 | pr_info("floppy driver state\n"); | |
1790 | pr_info("-------------------\n"); | |
1ebddd85 | 1791 | pr_info("now=%lu last interrupt=%lu diff=%lu last called handler=%pf\n", |
b46df356 JP |
1792 | jiffies, interruptjiffies, jiffies - interruptjiffies, |
1793 | lasthandler); | |
1da177e4 | 1794 | |
b46df356 JP |
1795 | pr_info("timeout_message=%s\n", timeout_message); |
1796 | pr_info("last output bytes:\n"); | |
1da177e4 | 1797 | for (i = 0; i < OLOGSIZE; i++) |
b46df356 JP |
1798 | pr_info("%2x %2x %lu\n", |
1799 | output_log[(i + output_log_pos) % OLOGSIZE].data, | |
1800 | output_log[(i + output_log_pos) % OLOGSIZE].status, | |
1801 | output_log[(i + output_log_pos) % OLOGSIZE].jiffies); | |
1802 | pr_info("last result at %lu\n", resultjiffies); | |
1803 | pr_info("last redo_fd_request at %lu\n", lastredo); | |
1804 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1, | |
1805 | reply_buffer, resultsize, true); | |
1da177e4 | 1806 | |
b46df356 JP |
1807 | pr_info("status=%x\n", fd_inb(FD_STATUS)); |
1808 | pr_info("fdc_busy=%lu\n", fdc_busy); | |
1da177e4 | 1809 | if (do_floppy) |
1ebddd85 | 1810 | pr_info("do_floppy=%pf\n", do_floppy); |
365970a1 | 1811 | if (work_pending(&floppy_work)) |
1ebddd85 | 1812 | pr_info("floppy_work.func=%pf\n", floppy_work.func); |
070ad7e7 JK |
1813 | if (delayed_work_pending(&fd_timer)) |
1814 | pr_info("delayed work.function=%p expires=%ld\n", | |
1815 | fd_timer.work.func, | |
1816 | fd_timer.timer.expires - jiffies); | |
1817 | if (delayed_work_pending(&fd_timeout)) | |
1818 | pr_info("timer_function=%p expires=%ld\n", | |
1819 | fd_timeout.work.func, | |
1820 | fd_timeout.timer.expires - jiffies); | |
1821 | ||
b46df356 JP |
1822 | pr_info("cont=%p\n", cont); |
1823 | pr_info("current_req=%p\n", current_req); | |
1824 | pr_info("command_status=%d\n", command_status); | |
1825 | pr_info("\n"); | |
1da177e4 LT |
1826 | } |
1827 | ||
070ad7e7 | 1828 | static void floppy_shutdown(struct work_struct *arg) |
1da177e4 LT |
1829 | { |
1830 | unsigned long flags; | |
1831 | ||
29f1c784 | 1832 | if (initialized) |
1da177e4 LT |
1833 | show_floppy(); |
1834 | cancel_activity(); | |
1835 | ||
1da177e4 LT |
1836 | flags = claim_dma_lock(); |
1837 | fd_disable_dma(); | |
1838 | release_dma_lock(flags); | |
1839 | ||
1840 | /* avoid dma going to a random drive after shutdown */ | |
1841 | ||
29f1c784 | 1842 | if (initialized) |
1da177e4 LT |
1843 | DPRINT("floppy timeout called\n"); |
1844 | FDCS->reset = 1; | |
1845 | if (cont) { | |
1846 | cont->done(0); | |
1847 | cont->redo(); /* this will recall reset when needed */ | |
1848 | } else { | |
b46df356 | 1849 | pr_info("no cont in shutdown!\n"); |
1da177e4 LT |
1850 | process_fd_request(); |
1851 | } | |
275176bc | 1852 | is_alive(__func__, ""); |
1da177e4 LT |
1853 | } |
1854 | ||
1da177e4 | 1855 | /* start motor, check media-changed condition and write protection */ |
06f748c4 | 1856 | static int start_motor(void (*function)(void)) |
1da177e4 | 1857 | { |
06f748c4 JJ |
1858 | int mask; |
1859 | int data; | |
1da177e4 LT |
1860 | |
1861 | mask = 0xfc; | |
1862 | data = UNIT(current_drive); | |
1863 | if (!(raw_cmd->flags & FD_RAW_NO_MOTOR)) { | |
1864 | if (!(FDCS->dor & (0x10 << UNIT(current_drive)))) { | |
1865 | set_debugt(); | |
1866 | /* no read since this drive is running */ | |
1867 | DRS->first_read_date = 0; | |
1868 | /* note motor start time if motor is not yet running */ | |
1869 | DRS->spinup_date = jiffies; | |
1870 | data |= (0x10 << UNIT(current_drive)); | |
1871 | } | |
1872 | } else if (FDCS->dor & (0x10 << UNIT(current_drive))) | |
1873 | mask &= ~(0x10 << UNIT(current_drive)); | |
1874 | ||
1875 | /* starts motor and selects floppy */ | |
1876 | del_timer(motor_off_timer + current_drive); | |
1877 | set_dor(fdc, mask, data); | |
1878 | ||
1879 | /* wait_for_completion also schedules reset if needed. */ | |
d7b2b2ec | 1880 | return fd_wait_for_completion(DRS->select_date + DP->select_delay, |
75ddb38f | 1881 | function); |
1da177e4 LT |
1882 | } |
1883 | ||
1884 | static void floppy_ready(void) | |
1885 | { | |
045f9836 JP |
1886 | if (FDCS->reset) { |
1887 | reset_fdc(); | |
1888 | return; | |
1889 | } | |
1da177e4 LT |
1890 | if (start_motor(floppy_ready)) |
1891 | return; | |
1892 | if (fdc_dtr()) | |
1893 | return; | |
1894 | ||
87f530d8 | 1895 | debug_dcl(DP->flags, "calling disk change from floppy_ready\n"); |
1da177e4 LT |
1896 | if (!(raw_cmd->flags & FD_RAW_NO_MOTOR) && |
1897 | disk_change(current_drive) && !DP->select_delay) | |
bb57f0c6 JP |
1898 | twaddle(); /* this clears the dcl on certain |
1899 | * drive/controller combinations */ | |
1da177e4 LT |
1900 | |
1901 | #ifdef fd_chose_dma_mode | |
1902 | if ((raw_cmd->flags & FD_RAW_READ) || (raw_cmd->flags & FD_RAW_WRITE)) { | |
1903 | unsigned long flags = claim_dma_lock(); | |
1904 | fd_chose_dma_mode(raw_cmd->kernel_data, raw_cmd->length); | |
1905 | release_dma_lock(flags); | |
1906 | } | |
1907 | #endif | |
1908 | ||
1909 | if (raw_cmd->flags & (FD_RAW_NEED_SEEK | FD_RAW_NEED_DISK)) { | |
1910 | perpendicular_mode(); | |
1911 | fdc_specify(); /* must be done here because of hut, hlt ... */ | |
1912 | seek_floppy(); | |
1913 | } else { | |
1914 | if ((raw_cmd->flags & FD_RAW_READ) || | |
1915 | (raw_cmd->flags & FD_RAW_WRITE)) | |
1916 | fdc_specify(); | |
1917 | setup_rw_floppy(); | |
1918 | } | |
1919 | } | |
1920 | ||
1921 | static void floppy_start(void) | |
1922 | { | |
73507e6c | 1923 | reschedule_timeout(current_reqD, "floppy start"); |
1da177e4 LT |
1924 | |
1925 | scandrives(); | |
87f530d8 | 1926 | debug_dcl(DP->flags, "setting NEWCHANGE in floppy_start\n"); |
e0298536 | 1927 | set_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags); |
1da177e4 LT |
1928 | floppy_ready(); |
1929 | } | |
1930 | ||
1931 | /* | |
1932 | * ======================================================================== | |
1933 | * here ends the bottom half. Exported routines are: | |
1934 | * floppy_start, floppy_off, floppy_ready, lock_fdc, unlock_fdc, set_fdc, | |
1935 | * start_motor, reset_fdc, reset_fdc_info, interpret_errors. | |
1936 | * Initialization also uses output_byte, result, set_dor, floppy_interrupt | |
1937 | * and set_dor. | |
1938 | * ======================================================================== | |
1939 | */ | |
1940 | /* | |
1941 | * General purpose continuations. | |
1942 | * ============================== | |
1943 | */ | |
1944 | ||
1945 | static void do_wakeup(void) | |
1946 | { | |
73507e6c | 1947 | reschedule_timeout(MAXTIMEOUT, "do wakeup"); |
1da177e4 LT |
1948 | cont = NULL; |
1949 | command_status += 2; | |
1950 | wake_up(&command_done); | |
1951 | } | |
1952 | ||
3b06c21e | 1953 | static const struct cont_t wakeup_cont = { |
1da177e4 LT |
1954 | .interrupt = empty, |
1955 | .redo = do_wakeup, | |
1956 | .error = empty, | |
06f748c4 | 1957 | .done = (done_f)empty |
1da177e4 LT |
1958 | }; |
1959 | ||
3b06c21e | 1960 | static const struct cont_t intr_cont = { |
1da177e4 LT |
1961 | .interrupt = empty, |
1962 | .redo = process_fd_request, | |
1963 | .error = empty, | |
06f748c4 | 1964 | .done = (done_f)empty |
1da177e4 LT |
1965 | }; |
1966 | ||
74f63f46 | 1967 | static int wait_til_done(void (*handler)(void), bool interruptible) |
1da177e4 LT |
1968 | { |
1969 | int ret; | |
1970 | ||
1971 | schedule_bh(handler); | |
1972 | ||
b862f26f SH |
1973 | if (interruptible) |
1974 | wait_event_interruptible(command_done, command_status >= 2); | |
1975 | else | |
1976 | wait_event(command_done, command_status >= 2); | |
1da177e4 LT |
1977 | |
1978 | if (command_status < 2) { | |
1979 | cancel_activity(); | |
1980 | cont = &intr_cont; | |
1981 | reset_fdc(); | |
1982 | return -EINTR; | |
1983 | } | |
1984 | ||
1985 | if (FDCS->reset) | |
1986 | command_status = FD_COMMAND_ERROR; | |
1987 | if (command_status == FD_COMMAND_OKAY) | |
1988 | ret = 0; | |
1989 | else | |
1990 | ret = -EIO; | |
1991 | command_status = FD_COMMAND_NONE; | |
1992 | return ret; | |
1993 | } | |
1994 | ||
1995 | static void generic_done(int result) | |
1996 | { | |
1997 | command_status = result; | |
1998 | cont = &wakeup_cont; | |
1999 | } | |
2000 | ||
2001 | static void generic_success(void) | |
2002 | { | |
2003 | cont->done(1); | |
2004 | } | |
2005 | ||
2006 | static void generic_failure(void) | |
2007 | { | |
2008 | cont->done(0); | |
2009 | } | |
2010 | ||
2011 | static void success_and_wakeup(void) | |
2012 | { | |
2013 | generic_success(); | |
2014 | cont->redo(); | |
2015 | } | |
2016 | ||
2017 | /* | |
2018 | * formatting and rw support. | |
2019 | * ========================== | |
2020 | */ | |
2021 | ||
2022 | static int next_valid_format(void) | |
2023 | { | |
2024 | int probed_format; | |
2025 | ||
2026 | probed_format = DRS->probed_format; | |
2027 | while (1) { | |
2028 | if (probed_format >= 8 || !DP->autodetect[probed_format]) { | |
2029 | DRS->probed_format = 0; | |
2030 | return 1; | |
2031 | } | |
2032 | if (floppy_type[DP->autodetect[probed_format]].sect) { | |
2033 | DRS->probed_format = probed_format; | |
2034 | return 0; | |
2035 | } | |
2036 | probed_format++; | |
2037 | } | |
2038 | } | |
2039 | ||
2040 | static void bad_flp_intr(void) | |
2041 | { | |
2042 | int err_count; | |
2043 | ||
2044 | if (probing) { | |
2045 | DRS->probed_format++; | |
2046 | if (!next_valid_format()) | |
2047 | return; | |
2048 | } | |
2049 | err_count = ++(*errors); | |
2050 | INFBOUND(DRWE->badness, err_count); | |
2051 | if (err_count > DP->max_errors.abort) | |
2052 | cont->done(0); | |
2053 | if (err_count > DP->max_errors.reset) | |
2054 | FDCS->reset = 1; | |
2055 | else if (err_count > DP->max_errors.recal) | |
2056 | DRS->track = NEED_2_RECAL; | |
2057 | } | |
2058 | ||
2059 | static void set_floppy(int drive) | |
2060 | { | |
2061 | int type = ITYPE(UDRS->fd_device); | |
06f748c4 | 2062 | |
1da177e4 LT |
2063 | if (type) |
2064 | _floppy = floppy_type + type; | |
2065 | else | |
2066 | _floppy = current_type[drive]; | |
2067 | } | |
2068 | ||
2069 | /* | |
2070 | * formatting support. | |
2071 | * =================== | |
2072 | */ | |
2073 | static void format_interrupt(void) | |
2074 | { | |
2075 | switch (interpret_errors()) { | |
2076 | case 1: | |
2077 | cont->error(); | |
2078 | case 2: | |
2079 | break; | |
2080 | case 0: | |
2081 | cont->done(1); | |
2082 | } | |
2083 | cont->redo(); | |
2084 | } | |
2085 | ||
48c8cee6 | 2086 | #define FM_MODE(x, y) ((y) & ~(((x)->rate & 0x80) >> 1)) |
1da177e4 | 2087 | #define CT(x) ((x) | 0xc0) |
48c8cee6 | 2088 | |
1da177e4 LT |
2089 | static void setup_format_params(int track) |
2090 | { | |
06f748c4 JJ |
2091 | int n; |
2092 | int il; | |
2093 | int count; | |
2094 | int head_shift; | |
2095 | int track_shift; | |
1da177e4 LT |
2096 | struct fparm { |
2097 | unsigned char track, head, sect, size; | |
2098 | } *here = (struct fparm *)floppy_track_buffer; | |
1da177e4 LT |
2099 | |
2100 | raw_cmd = &default_raw_cmd; | |
2101 | raw_cmd->track = track; | |
2102 | ||
48c8cee6 JP |
2103 | raw_cmd->flags = (FD_RAW_WRITE | FD_RAW_INTR | FD_RAW_SPIN | |
2104 | FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK); | |
1da177e4 LT |
2105 | raw_cmd->rate = _floppy->rate & 0x43; |
2106 | raw_cmd->cmd_count = NR_F; | |
2107 | COMMAND = FM_MODE(_floppy, FD_FORMAT); | |
2108 | DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, format_req.head); | |
2109 | F_SIZECODE = FD_SIZECODE(_floppy); | |
2110 | F_SECT_PER_TRACK = _floppy->sect << 2 >> F_SIZECODE; | |
2111 | F_GAP = _floppy->fmt_gap; | |
2112 | F_FILL = FD_FILL_BYTE; | |
2113 | ||
2114 | raw_cmd->kernel_data = floppy_track_buffer; | |
2115 | raw_cmd->length = 4 * F_SECT_PER_TRACK; | |
2116 | ||
2117 | /* allow for about 30ms for data transport per track */ | |
2118 | head_shift = (F_SECT_PER_TRACK + 5) / 6; | |
2119 | ||
2120 | /* a ``cylinder'' is two tracks plus a little stepping time */ | |
2121 | track_shift = 2 * head_shift + 3; | |
2122 | ||
2123 | /* position of logical sector 1 on this track */ | |
2124 | n = (track_shift * format_req.track + head_shift * format_req.head) | |
2125 | % F_SECT_PER_TRACK; | |
2126 | ||
2127 | /* determine interleave */ | |
2128 | il = 1; | |
2129 | if (_floppy->fmt_gap < 0x22) | |
2130 | il++; | |
2131 | ||
2132 | /* initialize field */ | |
2133 | for (count = 0; count < F_SECT_PER_TRACK; ++count) { | |
2134 | here[count].track = format_req.track; | |
2135 | here[count].head = format_req.head; | |
2136 | here[count].sect = 0; | |
2137 | here[count].size = F_SIZECODE; | |
2138 | } | |
2139 | /* place logical sectors */ | |
2140 | for (count = 1; count <= F_SECT_PER_TRACK; ++count) { | |
2141 | here[n].sect = count; | |
2142 | n = (n + il) % F_SECT_PER_TRACK; | |
2143 | if (here[n].sect) { /* sector busy, find next free sector */ | |
2144 | ++n; | |
2145 | if (n >= F_SECT_PER_TRACK) { | |
2146 | n -= F_SECT_PER_TRACK; | |
2147 | while (here[n].sect) | |
2148 | ++n; | |
2149 | } | |
2150 | } | |
2151 | } | |
9e49184c | 2152 | if (_floppy->stretch & FD_SECTBASEMASK) { |
1da177e4 | 2153 | for (count = 0; count < F_SECT_PER_TRACK; count++) |
9e49184c | 2154 | here[count].sect += FD_SECTBASE(_floppy) - 1; |
1da177e4 LT |
2155 | } |
2156 | } | |
2157 | ||
2158 | static void redo_format(void) | |
2159 | { | |
2160 | buffer_track = -1; | |
2161 | setup_format_params(format_req.track << STRETCH(_floppy)); | |
2162 | floppy_start(); | |
ded2863d | 2163 | debugt(__func__, "queue format request"); |
1da177e4 LT |
2164 | } |
2165 | ||
3b06c21e | 2166 | static const struct cont_t format_cont = { |
1da177e4 LT |
2167 | .interrupt = format_interrupt, |
2168 | .redo = redo_format, | |
2169 | .error = bad_flp_intr, | |
2170 | .done = generic_done | |
2171 | }; | |
2172 | ||
2173 | static int do_format(int drive, struct format_descr *tmp_format_req) | |
2174 | { | |
2175 | int ret; | |
2176 | ||
a0c80efe | 2177 | if (lock_fdc(drive)) |
52a0d61f JP |
2178 | return -EINTR; |
2179 | ||
1da177e4 LT |
2180 | set_floppy(drive); |
2181 | if (!_floppy || | |
2182 | _floppy->track > DP->tracks || | |
2183 | tmp_format_req->track >= _floppy->track || | |
2184 | tmp_format_req->head >= _floppy->head || | |
2185 | (_floppy->sect << 2) % (1 << FD_SIZECODE(_floppy)) || | |
2186 | !_floppy->fmt_gap) { | |
2187 | process_fd_request(); | |
2188 | return -EINVAL; | |
2189 | } | |
2190 | format_req = *tmp_format_req; | |
2191 | format_errors = 0; | |
2192 | cont = &format_cont; | |
2193 | errors = &format_errors; | |
74f63f46 | 2194 | ret = wait_til_done(redo_format, true); |
55eee80c JP |
2195 | if (ret == -EINTR) |
2196 | return -EINTR; | |
1da177e4 LT |
2197 | process_fd_request(); |
2198 | return ret; | |
2199 | } | |
2200 | ||
2201 | /* | |
2202 | * Buffer read/write and support | |
2203 | * ============================= | |
2204 | */ | |
2205 | ||
2a842aca | 2206 | static void floppy_end_request(struct request *req, blk_status_t error) |
1da177e4 LT |
2207 | { |
2208 | unsigned int nr_sectors = current_count_sectors; | |
1c5093ba | 2209 | unsigned int drive = (unsigned long)req->rq_disk->private_data; |
1da177e4 LT |
2210 | |
2211 | /* current_count_sectors can be zero if transfer failed */ | |
1c5093ba | 2212 | if (error) |
83096ebf | 2213 | nr_sectors = blk_rq_cur_sectors(req); |
1c5093ba | 2214 | if (__blk_end_request(req, error, nr_sectors << 9)) |
1da177e4 | 2215 | return; |
1da177e4 LT |
2216 | |
2217 | /* We're done with the request */ | |
1c5093ba | 2218 | floppy_off(drive); |
1da177e4 LT |
2219 | current_req = NULL; |
2220 | } | |
2221 | ||
2222 | /* new request_done. Can handle physical sectors which are smaller than a | |
2223 | * logical buffer */ | |
2224 | static void request_done(int uptodate) | |
2225 | { | |
1da177e4 | 2226 | struct request *req = current_req; |
48821184 | 2227 | struct request_queue *q; |
1da177e4 LT |
2228 | unsigned long flags; |
2229 | int block; | |
73507e6c | 2230 | char msg[sizeof("request done ") + sizeof(int) * 3]; |
1da177e4 LT |
2231 | |
2232 | probing = 0; | |
73507e6c JP |
2233 | snprintf(msg, sizeof(msg), "request done %d", uptodate); |
2234 | reschedule_timeout(MAXTIMEOUT, msg); | |
1da177e4 LT |
2235 | |
2236 | if (!req) { | |
b46df356 | 2237 | pr_info("floppy.c: no request in request_done\n"); |
1da177e4 LT |
2238 | return; |
2239 | } | |
2240 | ||
48821184 JA |
2241 | q = req->q; |
2242 | ||
1da177e4 LT |
2243 | if (uptodate) { |
2244 | /* maintain values for invalidation on geometry | |
2245 | * change */ | |
83096ebf | 2246 | block = current_count_sectors + blk_rq_pos(req); |
1da177e4 LT |
2247 | INFBOUND(DRS->maxblock, block); |
2248 | if (block > _floppy->sect) | |
2249 | DRS->maxtrack = 1; | |
2250 | ||
2251 | /* unlock chained buffers */ | |
2252 | spin_lock_irqsave(q->queue_lock, flags); | |
1c5093ba | 2253 | floppy_end_request(req, 0); |
1da177e4 LT |
2254 | spin_unlock_irqrestore(q->queue_lock, flags); |
2255 | } else { | |
2256 | if (rq_data_dir(req) == WRITE) { | |
2257 | /* record write error information */ | |
2258 | DRWE->write_errors++; | |
2259 | if (DRWE->write_errors == 1) { | |
83096ebf | 2260 | DRWE->first_error_sector = blk_rq_pos(req); |
1da177e4 LT |
2261 | DRWE->first_error_generation = DRS->generation; |
2262 | } | |
83096ebf | 2263 | DRWE->last_error_sector = blk_rq_pos(req); |
1da177e4 LT |
2264 | DRWE->last_error_generation = DRS->generation; |
2265 | } | |
2266 | spin_lock_irqsave(q->queue_lock, flags); | |
2a842aca | 2267 | floppy_end_request(req, BLK_STS_IOERR); |
1da177e4 LT |
2268 | spin_unlock_irqrestore(q->queue_lock, flags); |
2269 | } | |
2270 | } | |
2271 | ||
2272 | /* Interrupt handler evaluating the result of the r/w operation */ | |
2273 | static void rw_interrupt(void) | |
2274 | { | |
06f748c4 JJ |
2275 | int eoc; |
2276 | int ssize; | |
2277 | int heads; | |
2278 | int nr_sectors; | |
1da177e4 LT |
2279 | |
2280 | if (R_HEAD >= 2) { | |
2281 | /* some Toshiba floppy controllers occasionnally seem to | |
2282 | * return bogus interrupts after read/write operations, which | |
2283 | * can be recognized by a bad head number (>= 2) */ | |
2284 | return; | |
2285 | } | |
2286 | ||
2287 | if (!DRS->first_read_date) | |
2288 | DRS->first_read_date = jiffies; | |
2289 | ||
2290 | nr_sectors = 0; | |
712e1de4 | 2291 | ssize = DIV_ROUND_UP(1 << SIZECODE, 4); |
1da177e4 LT |
2292 | |
2293 | if (ST1 & ST1_EOC) | |
2294 | eoc = 1; | |
2295 | else | |
2296 | eoc = 0; | |
2297 | ||
2298 | if (COMMAND & 0x80) | |
2299 | heads = 2; | |
2300 | else | |
2301 | heads = 1; | |
2302 | ||
2303 | nr_sectors = (((R_TRACK - TRACK) * heads + | |
2304 | R_HEAD - HEAD) * SECT_PER_TRACK + | |
2305 | R_SECTOR - SECTOR + eoc) << SIZECODE >> 2; | |
2306 | ||
1da177e4 | 2307 | if (nr_sectors / ssize > |
061837bc | 2308 | DIV_ROUND_UP(in_sector_offset + current_count_sectors, ssize)) { |
1da177e4 LT |
2309 | DPRINT("long rw: %x instead of %lx\n", |
2310 | nr_sectors, current_count_sectors); | |
b46df356 JP |
2311 | pr_info("rs=%d s=%d\n", R_SECTOR, SECTOR); |
2312 | pr_info("rh=%d h=%d\n", R_HEAD, HEAD); | |
2313 | pr_info("rt=%d t=%d\n", R_TRACK, TRACK); | |
2314 | pr_info("heads=%d eoc=%d\n", heads, eoc); | |
2315 | pr_info("spt=%d st=%d ss=%d\n", | |
2316 | SECT_PER_TRACK, fsector_t, ssize); | |
2317 | pr_info("in_sector_offset=%d\n", in_sector_offset); | |
1da177e4 | 2318 | } |
1da177e4 LT |
2319 | |
2320 | nr_sectors -= in_sector_offset; | |
2321 | INFBOUND(nr_sectors, 0); | |
2322 | SUPBOUND(current_count_sectors, nr_sectors); | |
2323 | ||
2324 | switch (interpret_errors()) { | |
2325 | case 2: | |
2326 | cont->redo(); | |
2327 | return; | |
2328 | case 1: | |
2329 | if (!current_count_sectors) { | |
2330 | cont->error(); | |
2331 | cont->redo(); | |
2332 | return; | |
2333 | } | |
2334 | break; | |
2335 | case 0: | |
2336 | if (!current_count_sectors) { | |
2337 | cont->redo(); | |
2338 | return; | |
2339 | } | |
2340 | current_type[current_drive] = _floppy; | |
2341 | floppy_sizes[TOMINOR(current_drive)] = _floppy->size; | |
2342 | break; | |
2343 | } | |
2344 | ||
2345 | if (probing) { | |
2346 | if (DP->flags & FTD_MSG) | |
2347 | DPRINT("Auto-detected floppy type %s in fd%d\n", | |
2348 | _floppy->name, current_drive); | |
2349 | current_type[current_drive] = _floppy; | |
2350 | floppy_sizes[TOMINOR(current_drive)] = _floppy->size; | |
2351 | probing = 0; | |
2352 | } | |
2353 | ||
2354 | if (CT(COMMAND) != FD_READ || | |
b4f42e28 | 2355 | raw_cmd->kernel_data == bio_data(current_req->bio)) { |
1da177e4 LT |
2356 | /* transfer directly from buffer */ |
2357 | cont->done(1); | |
2358 | } else if (CT(COMMAND) == FD_READ) { | |
2359 | buffer_track = raw_cmd->track; | |
2360 | buffer_drive = current_drive; | |
2361 | INFBOUND(buffer_max, nr_sectors + fsector_t); | |
2362 | } | |
2363 | cont->redo(); | |
2364 | } | |
2365 | ||
2366 | /* Compute maximal contiguous buffer size. */ | |
2367 | static int buffer_chain_size(void) | |
2368 | { | |
7988613b | 2369 | struct bio_vec bv; |
5705f702 N |
2370 | int size; |
2371 | struct req_iterator iter; | |
1da177e4 LT |
2372 | char *base; |
2373 | ||
2374 | base = bio_data(current_req->bio); | |
2375 | size = 0; | |
2376 | ||
5705f702 | 2377 | rq_for_each_segment(bv, current_req, iter) { |
7988613b | 2378 | if (page_address(bv.bv_page) + bv.bv_offset != base + size) |
5705f702 | 2379 | break; |
1da177e4 | 2380 | |
7988613b | 2381 | size += bv.bv_len; |
1da177e4 LT |
2382 | } |
2383 | ||
2384 | return size >> 9; | |
2385 | } | |
2386 | ||
2387 | /* Compute the maximal transfer size */ | |
2388 | static int transfer_size(int ssize, int max_sector, int max_size) | |
2389 | { | |
2390 | SUPBOUND(max_sector, fsector_t + max_size); | |
2391 | ||
2392 | /* alignment */ | |
2393 | max_sector -= (max_sector % _floppy->sect) % ssize; | |
2394 | ||
2395 | /* transfer size, beginning not aligned */ | |
2396 | current_count_sectors = max_sector - fsector_t; | |
2397 | ||
2398 | return max_sector; | |
2399 | } | |
2400 | ||
2401 | /* | |
2402 | * Move data from/to the track buffer to/from the buffer cache. | |
2403 | */ | |
2404 | static void copy_buffer(int ssize, int max_sector, int max_sector_2) | |
2405 | { | |
2406 | int remaining; /* number of transferred 512-byte sectors */ | |
7988613b | 2407 | struct bio_vec bv; |
06f748c4 JJ |
2408 | char *buffer; |
2409 | char *dma_buffer; | |
5705f702 N |
2410 | int size; |
2411 | struct req_iterator iter; | |
1da177e4 LT |
2412 | |
2413 | max_sector = transfer_size(ssize, | |
2414 | min(max_sector, max_sector_2), | |
83096ebf | 2415 | blk_rq_sectors(current_req)); |
1da177e4 LT |
2416 | |
2417 | if (current_count_sectors <= 0 && CT(COMMAND) == FD_WRITE && | |
83096ebf | 2418 | buffer_max > fsector_t + blk_rq_sectors(current_req)) |
1da177e4 | 2419 | current_count_sectors = min_t(int, buffer_max - fsector_t, |
83096ebf | 2420 | blk_rq_sectors(current_req)); |
1da177e4 LT |
2421 | |
2422 | remaining = current_count_sectors << 9; | |
1011c1b9 | 2423 | if (remaining > blk_rq_bytes(current_req) && CT(COMMAND) == FD_WRITE) { |
1da177e4 | 2424 | DPRINT("in copy buffer\n"); |
b46df356 JP |
2425 | pr_info("current_count_sectors=%ld\n", current_count_sectors); |
2426 | pr_info("remaining=%d\n", remaining >> 9); | |
2427 | pr_info("current_req->nr_sectors=%u\n", | |
2428 | blk_rq_sectors(current_req)); | |
2429 | pr_info("current_req->current_nr_sectors=%u\n", | |
2430 | blk_rq_cur_sectors(current_req)); | |
2431 | pr_info("max_sector=%d\n", max_sector); | |
2432 | pr_info("ssize=%d\n", ssize); | |
1da177e4 | 2433 | } |
1da177e4 LT |
2434 | |
2435 | buffer_max = max(max_sector, buffer_max); | |
2436 | ||
2437 | dma_buffer = floppy_track_buffer + ((fsector_t - buffer_min) << 9); | |
2438 | ||
1011c1b9 | 2439 | size = blk_rq_cur_bytes(current_req); |
1da177e4 | 2440 | |
5705f702 N |
2441 | rq_for_each_segment(bv, current_req, iter) { |
2442 | if (!remaining) | |
2443 | break; | |
1da177e4 | 2444 | |
7988613b | 2445 | size = bv.bv_len; |
5705f702 | 2446 | SUPBOUND(size, remaining); |
1da177e4 | 2447 | |
7988613b | 2448 | buffer = page_address(bv.bv_page) + bv.bv_offset; |
5705f702 N |
2449 | if (dma_buffer + size > |
2450 | floppy_track_buffer + (max_buffer_sectors << 10) || | |
2451 | dma_buffer < floppy_track_buffer) { | |
2452 | DPRINT("buffer overrun in copy buffer %d\n", | |
b46df356 JP |
2453 | (int)((floppy_track_buffer - dma_buffer) >> 9)); |
2454 | pr_info("fsector_t=%d buffer_min=%d\n", | |
2455 | fsector_t, buffer_min); | |
2456 | pr_info("current_count_sectors=%ld\n", | |
2457 | current_count_sectors); | |
1da177e4 | 2458 | if (CT(COMMAND) == FD_READ) |
b46df356 | 2459 | pr_info("read\n"); |
5705f702 | 2460 | if (CT(COMMAND) == FD_WRITE) |
b46df356 | 2461 | pr_info("write\n"); |
5705f702 | 2462 | break; |
1da177e4 | 2463 | } |
5705f702 N |
2464 | if (((unsigned long)buffer) % 512) |
2465 | DPRINT("%p buffer not aligned\n", buffer); | |
1a23d133 | 2466 | |
5705f702 N |
2467 | if (CT(COMMAND) == FD_READ) |
2468 | memcpy(buffer, dma_buffer, size); | |
2469 | else | |
2470 | memcpy(dma_buffer, buffer, size); | |
2471 | ||
2472 | remaining -= size; | |
2473 | dma_buffer += size; | |
1da177e4 | 2474 | } |
1da177e4 LT |
2475 | if (remaining) { |
2476 | if (remaining > 0) | |
2477 | max_sector -= remaining >> 9; | |
2478 | DPRINT("weirdness: remaining %d\n", remaining >> 9); | |
2479 | } | |
1da177e4 LT |
2480 | } |
2481 | ||
1da177e4 LT |
2482 | /* work around a bug in pseudo DMA |
2483 | * (on some FDCs) pseudo DMA does not stop when the CPU stops | |
2484 | * sending data. Hence we need a different way to signal the | |
2485 | * transfer length: We use SECT_PER_TRACK. Unfortunately, this | |
2486 | * does not work with MT, hence we can only transfer one head at | |
2487 | * a time | |
2488 | */ | |
2489 | static void virtualdmabug_workaround(void) | |
2490 | { | |
06f748c4 JJ |
2491 | int hard_sectors; |
2492 | int end_sector; | |
1da177e4 LT |
2493 | |
2494 | if (CT(COMMAND) == FD_WRITE) { | |
2495 | COMMAND &= ~0x80; /* switch off multiple track mode */ | |
2496 | ||
2497 | hard_sectors = raw_cmd->length >> (7 + SIZECODE); | |
2498 | end_sector = SECTOR + hard_sectors - 1; | |
1da177e4 | 2499 | if (end_sector > SECT_PER_TRACK) { |
b46df356 JP |
2500 | pr_info("too many sectors %d > %d\n", |
2501 | end_sector, SECT_PER_TRACK); | |
1da177e4 LT |
2502 | return; |
2503 | } | |
48c8cee6 JP |
2504 | SECT_PER_TRACK = end_sector; |
2505 | /* make sure SECT_PER_TRACK | |
2506 | * points to end of transfer */ | |
1da177e4 LT |
2507 | } |
2508 | } | |
2509 | ||
2510 | /* | |
2511 | * Formulate a read/write request. | |
2512 | * this routine decides where to load the data (directly to buffer, or to | |
2513 | * tmp floppy area), how much data to load (the size of the buffer, the whole | |
2514 | * track, or a single sector) | |
2515 | * All floppy_track_buffer handling goes in here. If we ever add track buffer | |
2516 | * allocation on the fly, it should be done here. No other part should need | |
2517 | * modification. | |
2518 | */ | |
2519 | ||
2520 | static int make_raw_rw_request(void) | |
2521 | { | |
2522 | int aligned_sector_t; | |
06f748c4 JJ |
2523 | int max_sector; |
2524 | int max_size; | |
2525 | int tracksize; | |
2526 | int ssize; | |
1da177e4 | 2527 | |
01b6b67e | 2528 | if (WARN(max_buffer_sectors == 0, "VFS: Block I/O scheduled on unopened device\n")) |
1da177e4 | 2529 | return 0; |
1da177e4 LT |
2530 | |
2531 | set_fdc((long)current_req->rq_disk->private_data); | |
2532 | ||
2533 | raw_cmd = &default_raw_cmd; | |
2fb2ca6f | 2534 | raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK; |
1da177e4 LT |
2535 | raw_cmd->cmd_count = NR_RW; |
2536 | if (rq_data_dir(current_req) == READ) { | |
2537 | raw_cmd->flags |= FD_RAW_READ; | |
2538 | COMMAND = FM_MODE(_floppy, FD_READ); | |
2539 | } else if (rq_data_dir(current_req) == WRITE) { | |
2540 | raw_cmd->flags |= FD_RAW_WRITE; | |
2541 | COMMAND = FM_MODE(_floppy, FD_WRITE); | |
2542 | } else { | |
275176bc | 2543 | DPRINT("%s: unknown command\n", __func__); |
1da177e4 LT |
2544 | return 0; |
2545 | } | |
2546 | ||
2547 | max_sector = _floppy->sect * _floppy->head; | |
2548 | ||
83096ebf TH |
2549 | TRACK = (int)blk_rq_pos(current_req) / max_sector; |
2550 | fsector_t = (int)blk_rq_pos(current_req) % max_sector; | |
1da177e4 | 2551 | if (_floppy->track && TRACK >= _floppy->track) { |
83096ebf | 2552 | if (blk_rq_cur_sectors(current_req) & 1) { |
1da177e4 LT |
2553 | current_count_sectors = 1; |
2554 | return 1; | |
2555 | } else | |
2556 | return 0; | |
2557 | } | |
2558 | HEAD = fsector_t / _floppy->sect; | |
2559 | ||
9e49184c | 2560 | if (((_floppy->stretch & (FD_SWAPSIDES | FD_SECTBASEMASK)) || |
e0298536 JP |
2561 | test_bit(FD_NEED_TWADDLE_BIT, &DRS->flags)) && |
2562 | fsector_t < _floppy->sect) | |
1da177e4 LT |
2563 | max_sector = _floppy->sect; |
2564 | ||
2565 | /* 2M disks have phantom sectors on the first track */ | |
2566 | if ((_floppy->rate & FD_2M) && (!TRACK) && (!HEAD)) { | |
2567 | max_sector = 2 * _floppy->sect / 3; | |
2568 | if (fsector_t >= max_sector) { | |
2569 | current_count_sectors = | |
2570 | min_t(int, _floppy->sect - fsector_t, | |
83096ebf | 2571 | blk_rq_sectors(current_req)); |
1da177e4 LT |
2572 | return 1; |
2573 | } | |
2574 | SIZECODE = 2; | |
2575 | } else | |
2576 | SIZECODE = FD_SIZECODE(_floppy); | |
2577 | raw_cmd->rate = _floppy->rate & 0x43; | |
2578 | if ((_floppy->rate & FD_2M) && (TRACK || HEAD) && raw_cmd->rate == 2) | |
2579 | raw_cmd->rate = 1; | |
2580 | ||
2581 | if (SIZECODE) | |
2582 | SIZECODE2 = 0xff; | |
2583 | else | |
2584 | SIZECODE2 = 0x80; | |
2585 | raw_cmd->track = TRACK << STRETCH(_floppy); | |
2586 | DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, HEAD); | |
2587 | GAP = _floppy->gap; | |
712e1de4 | 2588 | ssize = DIV_ROUND_UP(1 << SIZECODE, 4); |
1da177e4 LT |
2589 | SECT_PER_TRACK = _floppy->sect << 2 >> SIZECODE; |
2590 | SECTOR = ((fsector_t % _floppy->sect) << 2 >> SIZECODE) + | |
9e49184c | 2591 | FD_SECTBASE(_floppy); |
1da177e4 LT |
2592 | |
2593 | /* tracksize describes the size which can be filled up with sectors | |
2594 | * of size ssize. | |
2595 | */ | |
2596 | tracksize = _floppy->sect - _floppy->sect % ssize; | |
2597 | if (tracksize < _floppy->sect) { | |
2598 | SECT_PER_TRACK++; | |
2599 | if (tracksize <= fsector_t % _floppy->sect) | |
2600 | SECTOR--; | |
2601 | ||
2602 | /* if we are beyond tracksize, fill up using smaller sectors */ | |
2603 | while (tracksize <= fsector_t % _floppy->sect) { | |
2604 | while (tracksize + ssize > _floppy->sect) { | |
2605 | SIZECODE--; | |
2606 | ssize >>= 1; | |
2607 | } | |
2608 | SECTOR++; | |
2609 | SECT_PER_TRACK++; | |
2610 | tracksize += ssize; | |
2611 | } | |
2612 | max_sector = HEAD * _floppy->sect + tracksize; | |
2613 | } else if (!TRACK && !HEAD && !(_floppy->rate & FD_2M) && probing) { | |
2614 | max_sector = _floppy->sect; | |
2615 | } else if (!HEAD && CT(COMMAND) == FD_WRITE) { | |
2616 | /* for virtual DMA bug workaround */ | |
2617 | max_sector = _floppy->sect; | |
2618 | } | |
2619 | ||
2620 | in_sector_offset = (fsector_t % _floppy->sect) % ssize; | |
2621 | aligned_sector_t = fsector_t - in_sector_offset; | |
83096ebf | 2622 | max_size = blk_rq_sectors(current_req); |
1da177e4 LT |
2623 | if ((raw_cmd->track == buffer_track) && |
2624 | (current_drive == buffer_drive) && | |
2625 | (fsector_t >= buffer_min) && (fsector_t < buffer_max)) { | |
2626 | /* data already in track buffer */ | |
2627 | if (CT(COMMAND) == FD_READ) { | |
2628 | copy_buffer(1, max_sector, buffer_max); | |
2629 | return 1; | |
2630 | } | |
83096ebf | 2631 | } else if (in_sector_offset || blk_rq_sectors(current_req) < ssize) { |
1da177e4 | 2632 | if (CT(COMMAND) == FD_WRITE) { |
d7b2b2ec JP |
2633 | unsigned int sectors; |
2634 | ||
2635 | sectors = fsector_t + blk_rq_sectors(current_req); | |
2636 | if (sectors > ssize && sectors < ssize + ssize) | |
1da177e4 LT |
2637 | max_size = ssize + ssize; |
2638 | else | |
2639 | max_size = ssize; | |
2640 | } | |
2641 | raw_cmd->flags &= ~FD_RAW_WRITE; | |
2642 | raw_cmd->flags |= FD_RAW_READ; | |
2643 | COMMAND = FM_MODE(_floppy, FD_READ); | |
b4f42e28 | 2644 | } else if ((unsigned long)bio_data(current_req->bio) < MAX_DMA_ADDRESS) { |
1da177e4 LT |
2645 | unsigned long dma_limit; |
2646 | int direct, indirect; | |
2647 | ||
2648 | indirect = | |
2649 | transfer_size(ssize, max_sector, | |
2650 | max_buffer_sectors * 2) - fsector_t; | |
2651 | ||
2652 | /* | |
2653 | * Do NOT use minimum() here---MAX_DMA_ADDRESS is 64 bits wide | |
2654 | * on a 64 bit machine! | |
2655 | */ | |
2656 | max_size = buffer_chain_size(); | |
d7b2b2ec | 2657 | dma_limit = (MAX_DMA_ADDRESS - |
b4f42e28 | 2658 | ((unsigned long)bio_data(current_req->bio))) >> 9; |
a81ee544 | 2659 | if ((unsigned long)max_size > dma_limit) |
1da177e4 | 2660 | max_size = dma_limit; |
1da177e4 | 2661 | /* 64 kb boundaries */ |
b4f42e28 | 2662 | if (CROSS_64KB(bio_data(current_req->bio), max_size << 9)) |
1da177e4 | 2663 | max_size = (K_64 - |
b4f42e28 | 2664 | ((unsigned long)bio_data(current_req->bio)) % |
1da177e4 LT |
2665 | K_64) >> 9; |
2666 | direct = transfer_size(ssize, max_sector, max_size) - fsector_t; | |
2667 | /* | |
2668 | * We try to read tracks, but if we get too many errors, we | |
2669 | * go back to reading just one sector at a time. | |
2670 | * | |
2671 | * This means we should be able to read a sector even if there | |
2672 | * are other bad sectors on this track. | |
2673 | */ | |
2674 | if (!direct || | |
2675 | (indirect * 2 > direct * 3 && | |
d7b2b2ec JP |
2676 | *errors < DP->max_errors.read_track && |
2677 | ((!probing || | |
2678 | (DP->read_track & (1 << DRS->probed_format)))))) { | |
83096ebf | 2679 | max_size = blk_rq_sectors(current_req); |
1da177e4 | 2680 | } else { |
b4f42e28 | 2681 | raw_cmd->kernel_data = bio_data(current_req->bio); |
1da177e4 LT |
2682 | raw_cmd->length = current_count_sectors << 9; |
2683 | if (raw_cmd->length == 0) { | |
275176bc | 2684 | DPRINT("%s: zero dma transfer attempted\n", __func__); |
d7b2b2ec | 2685 | DPRINT("indirect=%d direct=%d fsector_t=%d\n", |
1da177e4 LT |
2686 | indirect, direct, fsector_t); |
2687 | return 0; | |
2688 | } | |
1da177e4 LT |
2689 | virtualdmabug_workaround(); |
2690 | return 2; | |
2691 | } | |
2692 | } | |
2693 | ||
2694 | if (CT(COMMAND) == FD_READ) | |
2695 | max_size = max_sector; /* unbounded */ | |
2696 | ||
2697 | /* claim buffer track if needed */ | |
2698 | if (buffer_track != raw_cmd->track || /* bad track */ | |
2699 | buffer_drive != current_drive || /* bad drive */ | |
2700 | fsector_t > buffer_max || | |
2701 | fsector_t < buffer_min || | |
2702 | ((CT(COMMAND) == FD_READ || | |
83096ebf | 2703 | (!in_sector_offset && blk_rq_sectors(current_req) >= ssize)) && |
1da177e4 | 2704 | max_sector > 2 * max_buffer_sectors + buffer_min && |
bb57f0c6 JP |
2705 | max_size + fsector_t > 2 * max_buffer_sectors + buffer_min)) { |
2706 | /* not enough space */ | |
1da177e4 LT |
2707 | buffer_track = -1; |
2708 | buffer_drive = current_drive; | |
2709 | buffer_max = buffer_min = aligned_sector_t; | |
2710 | } | |
2711 | raw_cmd->kernel_data = floppy_track_buffer + | |
bb57f0c6 | 2712 | ((aligned_sector_t - buffer_min) << 9); |
1da177e4 LT |
2713 | |
2714 | if (CT(COMMAND) == FD_WRITE) { | |
2715 | /* copy write buffer to track buffer. | |
2716 | * if we get here, we know that the write | |
2717 | * is either aligned or the data already in the buffer | |
2718 | * (buffer will be overwritten) */ | |
1da177e4 LT |
2719 | if (in_sector_offset && buffer_track == -1) |
2720 | DPRINT("internal error offset !=0 on write\n"); | |
1da177e4 LT |
2721 | buffer_track = raw_cmd->track; |
2722 | buffer_drive = current_drive; | |
2723 | copy_buffer(ssize, max_sector, | |
2724 | 2 * max_buffer_sectors + buffer_min); | |
2725 | } else | |
2726 | transfer_size(ssize, max_sector, | |
2727 | 2 * max_buffer_sectors + buffer_min - | |
2728 | aligned_sector_t); | |
2729 | ||
2730 | /* round up current_count_sectors to get dma xfer size */ | |
2731 | raw_cmd->length = in_sector_offset + current_count_sectors; | |
2732 | raw_cmd->length = ((raw_cmd->length - 1) | (ssize - 1)) + 1; | |
2733 | raw_cmd->length <<= 9; | |
1da177e4 | 2734 | if ((raw_cmd->length < current_count_sectors << 9) || |
b4f42e28 | 2735 | (raw_cmd->kernel_data != bio_data(current_req->bio) && |
1da177e4 LT |
2736 | CT(COMMAND) == FD_WRITE && |
2737 | (aligned_sector_t + (raw_cmd->length >> 9) > buffer_max || | |
2738 | aligned_sector_t < buffer_min)) || | |
2739 | raw_cmd->length % (128 << SIZECODE) || | |
2740 | raw_cmd->length <= 0 || current_count_sectors <= 0) { | |
2741 | DPRINT("fractionary current count b=%lx s=%lx\n", | |
2742 | raw_cmd->length, current_count_sectors); | |
b4f42e28 | 2743 | if (raw_cmd->kernel_data != bio_data(current_req->bio)) |
b46df356 JP |
2744 | pr_info("addr=%d, length=%ld\n", |
2745 | (int)((raw_cmd->kernel_data - | |
2746 | floppy_track_buffer) >> 9), | |
2747 | current_count_sectors); | |
2748 | pr_info("st=%d ast=%d mse=%d msi=%d\n", | |
2749 | fsector_t, aligned_sector_t, max_sector, max_size); | |
2750 | pr_info("ssize=%x SIZECODE=%d\n", ssize, SIZECODE); | |
2751 | pr_info("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n", | |
2752 | COMMAND, SECTOR, HEAD, TRACK); | |
2753 | pr_info("buffer drive=%d\n", buffer_drive); | |
2754 | pr_info("buffer track=%d\n", buffer_track); | |
2755 | pr_info("buffer_min=%d\n", buffer_min); | |
2756 | pr_info("buffer_max=%d\n", buffer_max); | |
1da177e4 LT |
2757 | return 0; |
2758 | } | |
2759 | ||
b4f42e28 | 2760 | if (raw_cmd->kernel_data != bio_data(current_req->bio)) { |
1da177e4 LT |
2761 | if (raw_cmd->kernel_data < floppy_track_buffer || |
2762 | current_count_sectors < 0 || | |
2763 | raw_cmd->length < 0 || | |
2764 | raw_cmd->kernel_data + raw_cmd->length > | |
2765 | floppy_track_buffer + (max_buffer_sectors << 10)) { | |
2766 | DPRINT("buffer overrun in schedule dma\n"); | |
b46df356 JP |
2767 | pr_info("fsector_t=%d buffer_min=%d current_count=%ld\n", |
2768 | fsector_t, buffer_min, raw_cmd->length >> 9); | |
2769 | pr_info("current_count_sectors=%ld\n", | |
2770 | current_count_sectors); | |
1da177e4 | 2771 | if (CT(COMMAND) == FD_READ) |
b46df356 | 2772 | pr_info("read\n"); |
1da177e4 | 2773 | if (CT(COMMAND) == FD_WRITE) |
b46df356 | 2774 | pr_info("write\n"); |
1da177e4 LT |
2775 | return 0; |
2776 | } | |
1011c1b9 | 2777 | } else if (raw_cmd->length > blk_rq_bytes(current_req) || |
83096ebf | 2778 | current_count_sectors > blk_rq_sectors(current_req)) { |
1da177e4 LT |
2779 | DPRINT("buffer overrun in direct transfer\n"); |
2780 | return 0; | |
2781 | } else if (raw_cmd->length < current_count_sectors << 9) { | |
2782 | DPRINT("more sectors than bytes\n"); | |
b46df356 JP |
2783 | pr_info("bytes=%ld\n", raw_cmd->length >> 9); |
2784 | pr_info("sectors=%ld\n", current_count_sectors); | |
1da177e4 LT |
2785 | } |
2786 | if (raw_cmd->length == 0) { | |
2787 | DPRINT("zero dma transfer attempted from make_raw_request\n"); | |
2788 | return 0; | |
2789 | } | |
1da177e4 LT |
2790 | |
2791 | virtualdmabug_workaround(); | |
2792 | return 2; | |
2793 | } | |
2794 | ||
48821184 JA |
2795 | /* |
2796 | * Round-robin between our available drives, doing one request from each | |
2797 | */ | |
2798 | static int set_next_request(void) | |
2799 | { | |
2800 | struct request_queue *q; | |
2801 | int old_pos = fdc_queue; | |
2802 | ||
2803 | do { | |
2804 | q = disks[fdc_queue]->queue; | |
2805 | if (++fdc_queue == N_DRIVE) | |
2806 | fdc_queue = 0; | |
2807 | if (q) { | |
2808 | current_req = blk_fetch_request(q); | |
45908795 CH |
2809 | if (current_req) { |
2810 | current_req->error_count = 0; | |
48821184 | 2811 | break; |
45908795 | 2812 | } |
48821184 JA |
2813 | } |
2814 | } while (fdc_queue != old_pos); | |
2815 | ||
2816 | return current_req != NULL; | |
2817 | } | |
2818 | ||
1da177e4 LT |
2819 | static void redo_fd_request(void) |
2820 | { | |
1da177e4 LT |
2821 | int drive; |
2822 | int tmp; | |
2823 | ||
2824 | lastredo = jiffies; | |
2825 | if (current_drive < N_DRIVE) | |
2826 | floppy_off(current_drive); | |
2827 | ||
0da3132f JP |
2828 | do_request: |
2829 | if (!current_req) { | |
48821184 JA |
2830 | int pending; |
2831 | ||
2832 | spin_lock_irq(&floppy_lock); | |
2833 | pending = set_next_request(); | |
2834 | spin_unlock_irq(&floppy_lock); | |
48821184 | 2835 | if (!pending) { |
0da3132f JP |
2836 | do_floppy = NULL; |
2837 | unlock_fdc(); | |
1da177e4 | 2838 | return; |
1da177e4 | 2839 | } |
0da3132f JP |
2840 | } |
2841 | drive = (long)current_req->rq_disk->private_data; | |
2842 | set_fdc(drive); | |
73507e6c | 2843 | reschedule_timeout(current_reqD, "redo fd request"); |
1da177e4 | 2844 | |
0da3132f JP |
2845 | set_floppy(drive); |
2846 | raw_cmd = &default_raw_cmd; | |
2847 | raw_cmd->flags = 0; | |
2848 | if (start_motor(redo_fd_request)) | |
1da177e4 | 2849 | return; |
0da3132f JP |
2850 | |
2851 | disk_change(current_drive); | |
2852 | if (test_bit(current_drive, &fake_change) || | |
2853 | test_bit(FD_DISK_CHANGED_BIT, &DRS->flags)) { | |
2854 | DPRINT("disk absent or changed during operation\n"); | |
2855 | request_done(0); | |
2856 | goto do_request; | |
2857 | } | |
2858 | if (!_floppy) { /* Autodetection */ | |
2859 | if (!probing) { | |
2860 | DRS->probed_format = 0; | |
2861 | if (next_valid_format()) { | |
2862 | DPRINT("no autodetectable formats\n"); | |
2863 | _floppy = NULL; | |
2864 | request_done(0); | |
2865 | goto do_request; | |
2866 | } | |
2867 | } | |
2868 | probing = 1; | |
2869 | _floppy = floppy_type + DP->autodetect[DRS->probed_format]; | |
2870 | } else | |
2871 | probing = 0; | |
45908795 | 2872 | errors = &(current_req->error_count); |
0da3132f JP |
2873 | tmp = make_raw_rw_request(); |
2874 | if (tmp < 2) { | |
2875 | request_done(tmp); | |
2876 | goto do_request; | |
1da177e4 | 2877 | } |
0da3132f JP |
2878 | |
2879 | if (test_bit(FD_NEED_TWADDLE_BIT, &DRS->flags)) | |
2880 | twaddle(); | |
2881 | schedule_bh(floppy_start); | |
ded2863d | 2882 | debugt(__func__, "queue fd request"); |
0da3132f | 2883 | return; |
1da177e4 LT |
2884 | } |
2885 | ||
3b06c21e | 2886 | static const struct cont_t rw_cont = { |
1da177e4 LT |
2887 | .interrupt = rw_interrupt, |
2888 | .redo = redo_fd_request, | |
2889 | .error = bad_flp_intr, | |
2890 | .done = request_done | |
2891 | }; | |
2892 | ||
2893 | static void process_fd_request(void) | |
2894 | { | |
2895 | cont = &rw_cont; | |
2896 | schedule_bh(redo_fd_request); | |
2897 | } | |
2898 | ||
d7b2b2ec | 2899 | static void do_fd_request(struct request_queue *q) |
1da177e4 | 2900 | { |
01b6b67e SH |
2901 | if (WARN(max_buffer_sectors == 0, |
2902 | "VFS: %s called on non-open device\n", __func__)) | |
1da177e4 | 2903 | return; |
1da177e4 | 2904 | |
01b6b67e | 2905 | if (WARN(atomic_read(&usage_count) == 0, |
aebf526b CH |
2906 | "warning: usage count=0, current_req=%p sect=%ld flags=%llx\n", |
2907 | current_req, (long)blk_rq_pos(current_req), | |
5953316d | 2908 | (unsigned long long) current_req->cmd_flags)) |
1da177e4 | 2909 | return; |
01b6b67e | 2910 | |
070ad7e7 | 2911 | if (test_and_set_bit(0, &fdc_busy)) { |
1da177e4 LT |
2912 | /* fdc busy, this new request will be treated when the |
2913 | current one is done */ | |
275176bc | 2914 | is_alive(__func__, "old request running"); |
1da177e4 LT |
2915 | return; |
2916 | } | |
070ad7e7 JK |
2917 | command_status = FD_COMMAND_NONE; |
2918 | __reschedule_timeout(MAXTIMEOUT, "fd_request"); | |
2919 | set_fdc(0); | |
1da177e4 | 2920 | process_fd_request(); |
275176bc | 2921 | is_alive(__func__, ""); |
1da177e4 LT |
2922 | } |
2923 | ||
3b06c21e | 2924 | static const struct cont_t poll_cont = { |
1da177e4 LT |
2925 | .interrupt = success_and_wakeup, |
2926 | .redo = floppy_ready, | |
2927 | .error = generic_failure, | |
2928 | .done = generic_done | |
2929 | }; | |
2930 | ||
74f63f46 | 2931 | static int poll_drive(bool interruptible, int flag) |
1da177e4 | 2932 | { |
1da177e4 LT |
2933 | /* no auto-sense, just clear dcl */ |
2934 | raw_cmd = &default_raw_cmd; | |
2935 | raw_cmd->flags = flag; | |
2936 | raw_cmd->track = 0; | |
2937 | raw_cmd->cmd_count = 0; | |
2938 | cont = &poll_cont; | |
87f530d8 | 2939 | debug_dcl(DP->flags, "setting NEWCHANGE in poll_drive\n"); |
e0298536 | 2940 | set_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags); |
55eee80c JP |
2941 | |
2942 | return wait_til_done(floppy_ready, interruptible); | |
1da177e4 LT |
2943 | } |
2944 | ||
2945 | /* | |
2946 | * User triggered reset | |
2947 | * ==================== | |
2948 | */ | |
2949 | ||
2950 | static void reset_intr(void) | |
2951 | { | |
b46df356 | 2952 | pr_info("weird, reset interrupt called\n"); |
1da177e4 LT |
2953 | } |
2954 | ||
3b06c21e | 2955 | static const struct cont_t reset_cont = { |
1da177e4 LT |
2956 | .interrupt = reset_intr, |
2957 | .redo = success_and_wakeup, | |
2958 | .error = generic_failure, | |
2959 | .done = generic_done | |
2960 | }; | |
2961 | ||
74f63f46 | 2962 | static int user_reset_fdc(int drive, int arg, bool interruptible) |
1da177e4 LT |
2963 | { |
2964 | int ret; | |
2965 | ||
a0c80efe | 2966 | if (lock_fdc(drive)) |
52a0d61f JP |
2967 | return -EINTR; |
2968 | ||
1da177e4 LT |
2969 | if (arg == FD_RESET_ALWAYS) |
2970 | FDCS->reset = 1; | |
2971 | if (FDCS->reset) { | |
2972 | cont = &reset_cont; | |
55eee80c JP |
2973 | ret = wait_til_done(reset_fdc, interruptible); |
2974 | if (ret == -EINTR) | |
2975 | return -EINTR; | |
1da177e4 LT |
2976 | } |
2977 | process_fd_request(); | |
52a0d61f | 2978 | return 0; |
1da177e4 LT |
2979 | } |
2980 | ||
2981 | /* | |
2982 | * Misc Ioctl's and support | |
2983 | * ======================== | |
2984 | */ | |
2985 | static inline int fd_copyout(void __user *param, const void *address, | |
2986 | unsigned long size) | |
2987 | { | |
2988 | return copy_to_user(param, address, size) ? -EFAULT : 0; | |
2989 | } | |
2990 | ||
48c8cee6 JP |
2991 | static inline int fd_copyin(void __user *param, void *address, |
2992 | unsigned long size) | |
1da177e4 LT |
2993 | { |
2994 | return copy_from_user(address, param, size) ? -EFAULT : 0; | |
2995 | } | |
2996 | ||
be7a12bb | 2997 | static const char *drive_name(int type, int drive) |
1da177e4 LT |
2998 | { |
2999 | struct floppy_struct *floppy; | |
3000 | ||
3001 | if (type) | |
3002 | floppy = floppy_type + type; | |
3003 | else { | |
3004 | if (UDP->native_format) | |
3005 | floppy = floppy_type + UDP->native_format; | |
3006 | else | |
3007 | return "(null)"; | |
3008 | } | |
3009 | if (floppy->name) | |
3010 | return floppy->name; | |
3011 | else | |
3012 | return "(null)"; | |
3013 | } | |
3014 | ||
3015 | /* raw commands */ | |
3016 | static void raw_cmd_done(int flag) | |
3017 | { | |
3018 | int i; | |
3019 | ||
3020 | if (!flag) { | |
3021 | raw_cmd->flags |= FD_RAW_FAILURE; | |
3022 | raw_cmd->flags |= FD_RAW_HARDFAILURE; | |
3023 | } else { | |
3024 | raw_cmd->reply_count = inr; | |
3025 | if (raw_cmd->reply_count > MAX_REPLIES) | |
3026 | raw_cmd->reply_count = 0; | |
3027 | for (i = 0; i < raw_cmd->reply_count; i++) | |
3028 | raw_cmd->reply[i] = reply_buffer[i]; | |
3029 | ||
3030 | if (raw_cmd->flags & (FD_RAW_READ | FD_RAW_WRITE)) { | |
3031 | unsigned long flags; | |
3032 | flags = claim_dma_lock(); | |
3033 | raw_cmd->length = fd_get_dma_residue(); | |
3034 | release_dma_lock(flags); | |
3035 | } | |
3036 | ||
3037 | if ((raw_cmd->flags & FD_RAW_SOFTFAILURE) && | |
3038 | (!raw_cmd->reply_count || (raw_cmd->reply[0] & 0xc0))) | |
3039 | raw_cmd->flags |= FD_RAW_FAILURE; | |
3040 | ||
3041 | if (disk_change(current_drive)) | |
3042 | raw_cmd->flags |= FD_RAW_DISK_CHANGE; | |
3043 | else | |
3044 | raw_cmd->flags &= ~FD_RAW_DISK_CHANGE; | |
3045 | if (raw_cmd->flags & FD_RAW_NO_MOTOR_AFTER) | |
3046 | motor_off_callback(current_drive); | |
3047 | ||
3048 | if (raw_cmd->next && | |
3049 | (!(raw_cmd->flags & FD_RAW_FAILURE) || | |
3050 | !(raw_cmd->flags & FD_RAW_STOP_IF_FAILURE)) && | |
3051 | ((raw_cmd->flags & FD_RAW_FAILURE) || | |
3052 | !(raw_cmd->flags & FD_RAW_STOP_IF_SUCCESS))) { | |
3053 | raw_cmd = raw_cmd->next; | |
3054 | return; | |
3055 | } | |
3056 | } | |
3057 | generic_done(flag); | |
3058 | } | |
3059 | ||
3b06c21e | 3060 | static const struct cont_t raw_cmd_cont = { |
1da177e4 LT |
3061 | .interrupt = success_and_wakeup, |
3062 | .redo = floppy_start, | |
3063 | .error = generic_failure, | |
3064 | .done = raw_cmd_done | |
3065 | }; | |
3066 | ||
be7a12bb | 3067 | static int raw_cmd_copyout(int cmd, void __user *param, |
1da177e4 LT |
3068 | struct floppy_raw_cmd *ptr) |
3069 | { | |
3070 | int ret; | |
3071 | ||
3072 | while (ptr) { | |
2145e15e MD |
3073 | struct floppy_raw_cmd cmd = *ptr; |
3074 | cmd.next = NULL; | |
3075 | cmd.kernel_data = NULL; | |
3076 | ret = copy_to_user(param, &cmd, sizeof(cmd)); | |
86b12b48 JP |
3077 | if (ret) |
3078 | return -EFAULT; | |
1da177e4 LT |
3079 | param += sizeof(struct floppy_raw_cmd); |
3080 | if ((ptr->flags & FD_RAW_READ) && ptr->buffer_length) { | |
bb57f0c6 JP |
3081 | if (ptr->length >= 0 && |
3082 | ptr->length <= ptr->buffer_length) { | |
3083 | long length = ptr->buffer_length - ptr->length; | |
4575b552 JP |
3084 | ret = fd_copyout(ptr->data, ptr->kernel_data, |
3085 | length); | |
3086 | if (ret) | |
3087 | return ret; | |
bb57f0c6 | 3088 | } |
1da177e4 LT |
3089 | } |
3090 | ptr = ptr->next; | |
3091 | } | |
7f252717 | 3092 | |
1da177e4 LT |
3093 | return 0; |
3094 | } | |
3095 | ||
3096 | static void raw_cmd_free(struct floppy_raw_cmd **ptr) | |
3097 | { | |
06f748c4 JJ |
3098 | struct floppy_raw_cmd *next; |
3099 | struct floppy_raw_cmd *this; | |
1da177e4 LT |
3100 | |
3101 | this = *ptr; | |
3102 | *ptr = NULL; | |
3103 | while (this) { | |
3104 | if (this->buffer_length) { | |
3105 | fd_dma_mem_free((unsigned long)this->kernel_data, | |
3106 | this->buffer_length); | |
3107 | this->buffer_length = 0; | |
3108 | } | |
3109 | next = this->next; | |
3110 | kfree(this); | |
3111 | this = next; | |
3112 | } | |
3113 | } | |
3114 | ||
be7a12bb | 3115 | static int raw_cmd_copyin(int cmd, void __user *param, |
1da177e4 LT |
3116 | struct floppy_raw_cmd **rcmd) |
3117 | { | |
3118 | struct floppy_raw_cmd *ptr; | |
3119 | int ret; | |
3120 | int i; | |
3121 | ||
3122 | *rcmd = NULL; | |
7f252717 JP |
3123 | |
3124 | loop: | |
1661f2e2 | 3125 | ptr = kmalloc(sizeof(struct floppy_raw_cmd), GFP_KERNEL); |
7f252717 JP |
3126 | if (!ptr) |
3127 | return -ENOMEM; | |
3128 | *rcmd = ptr; | |
3129 | ret = copy_from_user(ptr, param, sizeof(*ptr)); | |
7f252717 JP |
3130 | ptr->next = NULL; |
3131 | ptr->buffer_length = 0; | |
ef87dbe7 MD |
3132 | ptr->kernel_data = NULL; |
3133 | if (ret) | |
3134 | return -EFAULT; | |
7f252717 JP |
3135 | param += sizeof(struct floppy_raw_cmd); |
3136 | if (ptr->cmd_count > 33) | |
1da177e4 LT |
3137 | /* the command may now also take up the space |
3138 | * initially intended for the reply & the | |
3139 | * reply count. Needed for long 82078 commands | |
3140 | * such as RESTORE, which takes ... 17 command | |
3141 | * bytes. Murphy's law #137: When you reserve | |
3142 | * 16 bytes for a structure, you'll one day | |
3143 | * discover that you really need 17... | |
3144 | */ | |
7f252717 JP |
3145 | return -EINVAL; |
3146 | ||
3147 | for (i = 0; i < 16; i++) | |
3148 | ptr->reply[i] = 0; | |
3149 | ptr->resultcode = 0; | |
7f252717 JP |
3150 | |
3151 | if (ptr->flags & (FD_RAW_READ | FD_RAW_WRITE)) { | |
3152 | if (ptr->length <= 0) | |
1da177e4 | 3153 | return -EINVAL; |
7f252717 JP |
3154 | ptr->kernel_data = (char *)fd_dma_mem_alloc(ptr->length); |
3155 | fallback_on_nodma_alloc(&ptr->kernel_data, ptr->length); | |
3156 | if (!ptr->kernel_data) | |
3157 | return -ENOMEM; | |
3158 | ptr->buffer_length = ptr->length; | |
3159 | } | |
3160 | if (ptr->flags & FD_RAW_WRITE) { | |
3161 | ret = fd_copyin(ptr->data, ptr->kernel_data, ptr->length); | |
3162 | if (ret) | |
3163 | return ret; | |
3164 | } | |
1da177e4 | 3165 | |
7f252717 | 3166 | if (ptr->flags & FD_RAW_MORE) { |
1da177e4 | 3167 | rcmd = &(ptr->next); |
1da177e4 | 3168 | ptr->rate &= 0x43; |
7f252717 | 3169 | goto loop; |
1da177e4 | 3170 | } |
7f252717 JP |
3171 | |
3172 | return 0; | |
1da177e4 LT |
3173 | } |
3174 | ||
3175 | static int raw_cmd_ioctl(int cmd, void __user *param) | |
3176 | { | |
1da177e4 | 3177 | struct floppy_raw_cmd *my_raw_cmd; |
06f748c4 JJ |
3178 | int drive; |
3179 | int ret2; | |
3180 | int ret; | |
1da177e4 LT |
3181 | |
3182 | if (FDCS->rawcmd <= 1) | |
3183 | FDCS->rawcmd = 1; | |
3184 | for (drive = 0; drive < N_DRIVE; drive++) { | |
3185 | if (FDC(drive) != fdc) | |
3186 | continue; | |
3187 | if (drive == current_drive) { | |
3188 | if (UDRS->fd_ref > 1) { | |
3189 | FDCS->rawcmd = 2; | |
3190 | break; | |
3191 | } | |
3192 | } else if (UDRS->fd_ref) { | |
3193 | FDCS->rawcmd = 2; | |
3194 | break; | |
3195 | } | |
3196 | } | |
3197 | ||
3198 | if (FDCS->reset) | |
3199 | return -EIO; | |
3200 | ||
3201 | ret = raw_cmd_copyin(cmd, param, &my_raw_cmd); | |
3202 | if (ret) { | |
3203 | raw_cmd_free(&my_raw_cmd); | |
3204 | return ret; | |
3205 | } | |
3206 | ||
3207 | raw_cmd = my_raw_cmd; | |
3208 | cont = &raw_cmd_cont; | |
74f63f46 | 3209 | ret = wait_til_done(floppy_start, true); |
87f530d8 | 3210 | debug_dcl(DP->flags, "calling disk change from raw_cmd ioctl\n"); |
1da177e4 LT |
3211 | |
3212 | if (ret != -EINTR && FDCS->reset) | |
3213 | ret = -EIO; | |
3214 | ||
3215 | DRS->track = NO_TRACK; | |
3216 | ||
3217 | ret2 = raw_cmd_copyout(cmd, param, my_raw_cmd); | |
3218 | if (!ret) | |
3219 | ret = ret2; | |
3220 | raw_cmd_free(&my_raw_cmd); | |
3221 | return ret; | |
3222 | } | |
3223 | ||
3224 | static int invalidate_drive(struct block_device *bdev) | |
3225 | { | |
3226 | /* invalidate the buffer track to force a reread */ | |
3227 | set_bit((long)bdev->bd_disk->private_data, &fake_change); | |
3228 | process_fd_request(); | |
3229 | check_disk_change(bdev); | |
3230 | return 0; | |
3231 | } | |
3232 | ||
be7a12bb | 3233 | static int set_geometry(unsigned int cmd, struct floppy_struct *g, |
1da177e4 LT |
3234 | int drive, int type, struct block_device *bdev) |
3235 | { | |
3236 | int cnt; | |
3237 | ||
3238 | /* sanity checking for parameters. */ | |
3239 | if (g->sect <= 0 || | |
3240 | g->head <= 0 || | |
3241 | g->track <= 0 || g->track > UDP->tracks >> STRETCH(g) || | |
3242 | /* check if reserved bits are set */ | |
9e49184c | 3243 | (g->stretch & ~(FD_STRETCH | FD_SWAPSIDES | FD_SECTBASEMASK)) != 0) |
1da177e4 LT |
3244 | return -EINVAL; |
3245 | if (type) { | |
3246 | if (!capable(CAP_SYS_ADMIN)) | |
3247 | return -EPERM; | |
b1c82b5c | 3248 | mutex_lock(&open_lock); |
a0c80efe | 3249 | if (lock_fdc(drive)) { |
8516a500 JS |
3250 | mutex_unlock(&open_lock); |
3251 | return -EINTR; | |
3252 | } | |
1da177e4 LT |
3253 | floppy_type[type] = *g; |
3254 | floppy_type[type].name = "user format"; | |
3255 | for (cnt = type << 2; cnt < (type << 2) + 4; cnt++) | |
3256 | floppy_sizes[cnt] = floppy_sizes[cnt + 0x80] = | |
3257 | floppy_type[type].size + 1; | |
3258 | process_fd_request(); | |
3259 | for (cnt = 0; cnt < N_DRIVE; cnt++) { | |
3260 | struct block_device *bdev = opened_bdev[cnt]; | |
3261 | if (!bdev || ITYPE(drive_state[cnt].fd_device) != type) | |
3262 | continue; | |
93b270f7 | 3263 | __invalidate_device(bdev, true); |
1da177e4 | 3264 | } |
b1c82b5c | 3265 | mutex_unlock(&open_lock); |
1da177e4 LT |
3266 | } else { |
3267 | int oldStretch; | |
52a0d61f | 3268 | |
a0c80efe | 3269 | if (lock_fdc(drive)) |
52a0d61f | 3270 | return -EINTR; |
4575b552 | 3271 | if (cmd != FDDEFPRM) { |
1da177e4 LT |
3272 | /* notice a disk change immediately, else |
3273 | * we lose our settings immediately*/ | |
74f63f46 | 3274 | if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR) |
4575b552 JP |
3275 | return -EINTR; |
3276 | } | |
1da177e4 LT |
3277 | oldStretch = g->stretch; |
3278 | user_params[drive] = *g; | |
3279 | if (buffer_drive == drive) | |
3280 | SUPBOUND(buffer_max, user_params[drive].sect); | |
3281 | current_type[drive] = &user_params[drive]; | |
3282 | floppy_sizes[drive] = user_params[drive].size; | |
3283 | if (cmd == FDDEFPRM) | |
3284 | DRS->keep_data = -1; | |
3285 | else | |
3286 | DRS->keep_data = 1; | |
3287 | /* invalidation. Invalidate only when needed, i.e. | |
3288 | * when there are already sectors in the buffer cache | |
3289 | * whose number will change. This is useful, because | |
3290 | * mtools often changes the geometry of the disk after | |
3291 | * looking at the boot block */ | |
3292 | if (DRS->maxblock > user_params[drive].sect || | |
3293 | DRS->maxtrack || | |
3294 | ((user_params[drive].sect ^ oldStretch) & | |
9e49184c | 3295 | (FD_SWAPSIDES | FD_SECTBASEMASK))) |
1da177e4 LT |
3296 | invalidate_drive(bdev); |
3297 | else | |
3298 | process_fd_request(); | |
3299 | } | |
3300 | return 0; | |
3301 | } | |
3302 | ||
3303 | /* handle obsolete ioctl's */ | |
21af5448 | 3304 | static unsigned int ioctl_table[] = { |
1da177e4 LT |
3305 | FDCLRPRM, |
3306 | FDSETPRM, | |
3307 | FDDEFPRM, | |
3308 | FDGETPRM, | |
3309 | FDMSGON, | |
3310 | FDMSGOFF, | |
3311 | FDFMTBEG, | |
3312 | FDFMTTRK, | |
3313 | FDFMTEND, | |
3314 | FDSETEMSGTRESH, | |
3315 | FDFLUSH, | |
3316 | FDSETMAXERRS, | |
3317 | FDGETMAXERRS, | |
3318 | FDGETDRVTYP, | |
3319 | FDSETDRVPRM, | |
3320 | FDGETDRVPRM, | |
3321 | FDGETDRVSTAT, | |
3322 | FDPOLLDRVSTAT, | |
3323 | FDRESET, | |
3324 | FDGETFDCSTAT, | |
3325 | FDWERRORCLR, | |
3326 | FDWERRORGET, | |
3327 | FDRAWCMD, | |
3328 | FDEJECT, | |
3329 | FDTWADDLE | |
3330 | }; | |
3331 | ||
21af5448 | 3332 | static int normalize_ioctl(unsigned int *cmd, int *size) |
1da177e4 LT |
3333 | { |
3334 | int i; | |
3335 | ||
3336 | for (i = 0; i < ARRAY_SIZE(ioctl_table); i++) { | |
3337 | if ((*cmd & 0xffff) == (ioctl_table[i] & 0xffff)) { | |
3338 | *size = _IOC_SIZE(*cmd); | |
3339 | *cmd = ioctl_table[i]; | |
3340 | if (*size > _IOC_SIZE(*cmd)) { | |
b46df356 | 3341 | pr_info("ioctl not yet supported\n"); |
1da177e4 LT |
3342 | return -EFAULT; |
3343 | } | |
3344 | return 0; | |
3345 | } | |
3346 | } | |
3347 | return -EINVAL; | |
3348 | } | |
3349 | ||
3350 | static int get_floppy_geometry(int drive, int type, struct floppy_struct **g) | |
3351 | { | |
3352 | if (type) | |
3353 | *g = &floppy_type[type]; | |
3354 | else { | |
a0c80efe | 3355 | if (lock_fdc(drive)) |
52a0d61f | 3356 | return -EINTR; |
74f63f46 | 3357 | if (poll_drive(false, 0) == -EINTR) |
4575b552 | 3358 | return -EINTR; |
1da177e4 LT |
3359 | process_fd_request(); |
3360 | *g = current_type[drive]; | |
3361 | } | |
3362 | if (!*g) | |
3363 | return -ENODEV; | |
3364 | return 0; | |
3365 | } | |
3366 | ||
a885c8c4 CH |
3367 | static int fd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
3368 | { | |
3369 | int drive = (long)bdev->bd_disk->private_data; | |
3370 | int type = ITYPE(drive_state[drive].fd_device); | |
3371 | struct floppy_struct *g; | |
3372 | int ret; | |
3373 | ||
3374 | ret = get_floppy_geometry(drive, type, &g); | |
3375 | if (ret) | |
3376 | return ret; | |
3377 | ||
3378 | geo->heads = g->head; | |
3379 | geo->sectors = g->sect; | |
3380 | geo->cylinders = g->track; | |
3381 | return 0; | |
3382 | } | |
3383 | ||
8a6cfeb6 | 3384 | static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, |
1da177e4 LT |
3385 | unsigned long param) |
3386 | { | |
a4af9b48 | 3387 | int drive = (long)bdev->bd_disk->private_data; |
06f748c4 JJ |
3388 | int type = ITYPE(UDRS->fd_device); |
3389 | int i; | |
1da177e4 LT |
3390 | int ret; |
3391 | int size; | |
3392 | union inparam { | |
3393 | struct floppy_struct g; /* geometry */ | |
3394 | struct format_descr f; | |
3395 | struct floppy_max_errors max_errors; | |
3396 | struct floppy_drive_params dp; | |
3397 | } inparam; /* parameters coming from user space */ | |
724ee626 | 3398 | const void *outparam; /* parameters passed back to user space */ |
1da177e4 LT |
3399 | |
3400 | /* convert compatibility eject ioctls into floppy eject ioctl. | |
3401 | * We do this in order to provide a means to eject floppy disks before | |
3402 | * installing the new fdutils package */ | |
3403 | if (cmd == CDROMEJECT || /* CD-ROM eject */ | |
a81ee544 | 3404 | cmd == 0x6470) { /* SunOS floppy eject */ |
1da177e4 LT |
3405 | DPRINT("obsolete eject ioctl\n"); |
3406 | DPRINT("please use floppycontrol --eject\n"); | |
3407 | cmd = FDEJECT; | |
3408 | } | |
3409 | ||
a81ee544 | 3410 | if (!((cmd & 0xff00) == 0x0200)) |
1da177e4 LT |
3411 | return -EINVAL; |
3412 | ||
a81ee544 | 3413 | /* convert the old style command into a new style command */ |
4575b552 JP |
3414 | ret = normalize_ioctl(&cmd, &size); |
3415 | if (ret) | |
3416 | return ret; | |
a81ee544 | 3417 | |
1da177e4 | 3418 | /* permission checks */ |
0aad92cf | 3419 | if (((cmd & 0x40) && !(mode & (FMODE_WRITE | FMODE_WRITE_IOCTL))) || |
1da177e4 LT |
3420 | ((cmd & 0x80) && !capable(CAP_SYS_ADMIN))) |
3421 | return -EPERM; | |
3422 | ||
2886a8bd AV |
3423 | if (WARN_ON(size < 0 || size > sizeof(inparam))) |
3424 | return -EINVAL; | |
3425 | ||
1da177e4 | 3426 | /* copyin */ |
b87c9e0a | 3427 | memset(&inparam, 0, sizeof(inparam)); |
4575b552 JP |
3428 | if (_IOC_DIR(cmd) & _IOC_WRITE) { |
3429 | ret = fd_copyin((void __user *)param, &inparam, size); | |
3430 | if (ret) | |
3431 | return ret; | |
3432 | } | |
1da177e4 | 3433 | |
da273653 JP |
3434 | switch (cmd) { |
3435 | case FDEJECT: | |
3436 | if (UDRS->fd_ref != 1) | |
3437 | /* somebody else has this drive open */ | |
3438 | return -EBUSY; | |
a0c80efe | 3439 | if (lock_fdc(drive)) |
52a0d61f | 3440 | return -EINTR; |
1da177e4 | 3441 | |
da273653 JP |
3442 | /* do the actual eject. Fails on |
3443 | * non-Sparc architectures */ | |
3444 | ret = fd_eject(UNIT(drive)); | |
1da177e4 | 3445 | |
e0298536 JP |
3446 | set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); |
3447 | set_bit(FD_VERIFY_BIT, &UDRS->flags); | |
da273653 JP |
3448 | process_fd_request(); |
3449 | return ret; | |
3450 | case FDCLRPRM: | |
a0c80efe | 3451 | if (lock_fdc(drive)) |
52a0d61f | 3452 | return -EINTR; |
da273653 JP |
3453 | current_type[drive] = NULL; |
3454 | floppy_sizes[drive] = MAX_DISK_SIZE << 1; | |
3455 | UDRS->keep_data = 0; | |
3456 | return invalidate_drive(bdev); | |
3457 | case FDSETPRM: | |
3458 | case FDDEFPRM: | |
3459 | return set_geometry(cmd, &inparam.g, drive, type, bdev); | |
3460 | case FDGETPRM: | |
4575b552 | 3461 | ret = get_floppy_geometry(drive, type, |
724ee626 | 3462 | (struct floppy_struct **)&outparam); |
4575b552 JP |
3463 | if (ret) |
3464 | return ret; | |
da273653 JP |
3465 | break; |
3466 | case FDMSGON: | |
3467 | UDP->flags |= FTD_MSG; | |
3468 | return 0; | |
3469 | case FDMSGOFF: | |
3470 | UDP->flags &= ~FTD_MSG; | |
3471 | return 0; | |
3472 | case FDFMTBEG: | |
a0c80efe | 3473 | if (lock_fdc(drive)) |
52a0d61f | 3474 | return -EINTR; |
74f63f46 | 3475 | if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR) |
4575b552 | 3476 | return -EINTR; |
da273653 JP |
3477 | ret = UDRS->flags; |
3478 | process_fd_request(); | |
3479 | if (ret & FD_VERIFY) | |
3480 | return -ENODEV; | |
3481 | if (!(ret & FD_DISK_WRITABLE)) | |
3482 | return -EROFS; | |
3483 | return 0; | |
3484 | case FDFMTTRK: | |
3485 | if (UDRS->fd_ref != 1) | |
3486 | return -EBUSY; | |
3487 | return do_format(drive, &inparam.f); | |
3488 | case FDFMTEND: | |
3489 | case FDFLUSH: | |
a0c80efe | 3490 | if (lock_fdc(drive)) |
52a0d61f | 3491 | return -EINTR; |
da273653 JP |
3492 | return invalidate_drive(bdev); |
3493 | case FDSETEMSGTRESH: | |
3494 | UDP->max_errors.reporting = (unsigned short)(param & 0x0f); | |
3495 | return 0; | |
3496 | case FDGETMAXERRS: | |
724ee626 | 3497 | outparam = &UDP->max_errors; |
da273653 JP |
3498 | break; |
3499 | case FDSETMAXERRS: | |
3500 | UDP->max_errors = inparam.max_errors; | |
3501 | break; | |
3502 | case FDGETDRVTYP: | |
3503 | outparam = drive_name(type, drive); | |
724ee626 | 3504 | SUPBOUND(size, strlen((const char *)outparam) + 1); |
da273653 JP |
3505 | break; |
3506 | case FDSETDRVPRM: | |
3507 | *UDP = inparam.dp; | |
3508 | break; | |
3509 | case FDGETDRVPRM: | |
724ee626 | 3510 | outparam = UDP; |
da273653 JP |
3511 | break; |
3512 | case FDPOLLDRVSTAT: | |
a0c80efe | 3513 | if (lock_fdc(drive)) |
52a0d61f | 3514 | return -EINTR; |
74f63f46 | 3515 | if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR) |
4575b552 | 3516 | return -EINTR; |
da273653 JP |
3517 | process_fd_request(); |
3518 | /* fall through */ | |
3519 | case FDGETDRVSTAT: | |
724ee626 | 3520 | outparam = UDRS; |
da273653 JP |
3521 | break; |
3522 | case FDRESET: | |
74f63f46 | 3523 | return user_reset_fdc(drive, (int)param, true); |
da273653 | 3524 | case FDGETFDCSTAT: |
724ee626 | 3525 | outparam = UFDCS; |
da273653 JP |
3526 | break; |
3527 | case FDWERRORCLR: | |
3528 | memset(UDRWE, 0, sizeof(*UDRWE)); | |
3529 | return 0; | |
3530 | case FDWERRORGET: | |
724ee626 | 3531 | outparam = UDRWE; |
da273653 JP |
3532 | break; |
3533 | case FDRAWCMD: | |
3534 | if (type) | |
1da177e4 | 3535 | return -EINVAL; |
a0c80efe | 3536 | if (lock_fdc(drive)) |
52a0d61f | 3537 | return -EINTR; |
da273653 | 3538 | set_floppy(drive); |
4575b552 JP |
3539 | i = raw_cmd_ioctl(cmd, (void __user *)param); |
3540 | if (i == -EINTR) | |
3541 | return -EINTR; | |
da273653 JP |
3542 | process_fd_request(); |
3543 | return i; | |
3544 | case FDTWADDLE: | |
a0c80efe | 3545 | if (lock_fdc(drive)) |
52a0d61f | 3546 | return -EINTR; |
da273653 JP |
3547 | twaddle(); |
3548 | process_fd_request(); | |
3549 | return 0; | |
3550 | default: | |
3551 | return -EINVAL; | |
3552 | } | |
1da177e4 LT |
3553 | |
3554 | if (_IOC_DIR(cmd) & _IOC_READ) | |
3555 | return fd_copyout((void __user *)param, outparam, size); | |
da273653 JP |
3556 | |
3557 | return 0; | |
1da177e4 LT |
3558 | } |
3559 | ||
8a6cfeb6 AB |
3560 | static int fd_ioctl(struct block_device *bdev, fmode_t mode, |
3561 | unsigned int cmd, unsigned long param) | |
3562 | { | |
3563 | int ret; | |
3564 | ||
2a48fc0a | 3565 | mutex_lock(&floppy_mutex); |
8a6cfeb6 | 3566 | ret = fd_locked_ioctl(bdev, mode, cmd, param); |
2a48fc0a | 3567 | mutex_unlock(&floppy_mutex); |
8a6cfeb6 AB |
3568 | |
3569 | return ret; | |
3570 | } | |
3571 | ||
229b53c9 AV |
3572 | #ifdef CONFIG_COMPAT |
3573 | ||
3574 | struct compat_floppy_drive_params { | |
3575 | char cmos; | |
3576 | compat_ulong_t max_dtr; | |
3577 | compat_ulong_t hlt; | |
3578 | compat_ulong_t hut; | |
3579 | compat_ulong_t srt; | |
3580 | compat_ulong_t spinup; | |
3581 | compat_ulong_t spindown; | |
3582 | unsigned char spindown_offset; | |
3583 | unsigned char select_delay; | |
3584 | unsigned char rps; | |
3585 | unsigned char tracks; | |
3586 | compat_ulong_t timeout; | |
3587 | unsigned char interleave_sect; | |
3588 | struct floppy_max_errors max_errors; | |
3589 | char flags; | |
3590 | char read_track; | |
3591 | short autodetect[8]; | |
3592 | compat_int_t checkfreq; | |
3593 | compat_int_t native_format; | |
3594 | }; | |
3595 | ||
3596 | struct compat_floppy_drive_struct { | |
3597 | signed char flags; | |
3598 | compat_ulong_t spinup_date; | |
3599 | compat_ulong_t select_date; | |
3600 | compat_ulong_t first_read_date; | |
3601 | short probed_format; | |
3602 | short track; | |
3603 | short maxblock; | |
3604 | short maxtrack; | |
3605 | compat_int_t generation; | |
3606 | compat_int_t keep_data; | |
3607 | compat_int_t fd_ref; | |
3608 | compat_int_t fd_device; | |
3609 | compat_int_t last_checked; | |
3610 | compat_caddr_t dmabuf; | |
3611 | compat_int_t bufblocks; | |
3612 | }; | |
3613 | ||
3614 | struct compat_floppy_fdc_state { | |
3615 | compat_int_t spec1; | |
3616 | compat_int_t spec2; | |
3617 | compat_int_t dtr; | |
3618 | unsigned char version; | |
3619 | unsigned char dor; | |
3620 | compat_ulong_t address; | |
3621 | unsigned int rawcmd:2; | |
3622 | unsigned int reset:1; | |
3623 | unsigned int need_configure:1; | |
3624 | unsigned int perp_mode:2; | |
3625 | unsigned int has_fifo:1; | |
3626 | unsigned int driver_version; | |
3627 | unsigned char track[4]; | |
3628 | }; | |
3629 | ||
3630 | struct compat_floppy_write_errors { | |
3631 | unsigned int write_errors; | |
3632 | compat_ulong_t first_error_sector; | |
3633 | compat_int_t first_error_generation; | |
3634 | compat_ulong_t last_error_sector; | |
3635 | compat_int_t last_error_generation; | |
3636 | compat_uint_t badness; | |
3637 | }; | |
3638 | ||
3639 | #define FDSETPRM32 _IOW(2, 0x42, struct compat_floppy_struct) | |
3640 | #define FDDEFPRM32 _IOW(2, 0x43, struct compat_floppy_struct) | |
3641 | #define FDSETDRVPRM32 _IOW(2, 0x90, struct compat_floppy_drive_params) | |
3642 | #define FDGETDRVPRM32 _IOR(2, 0x11, struct compat_floppy_drive_params) | |
3643 | #define FDGETDRVSTAT32 _IOR(2, 0x12, struct compat_floppy_drive_struct) | |
3644 | #define FDPOLLDRVSTAT32 _IOR(2, 0x13, struct compat_floppy_drive_struct) | |
3645 | #define FDGETFDCSTAT32 _IOR(2, 0x15, struct compat_floppy_fdc_state) | |
3646 | #define FDWERRORGET32 _IOR(2, 0x17, struct compat_floppy_write_errors) | |
3647 | ||
3648 | static int compat_set_geometry(struct block_device *bdev, fmode_t mode, unsigned int cmd, | |
3649 | struct compat_floppy_struct __user *arg) | |
3650 | { | |
3651 | struct floppy_struct v; | |
3652 | int drive, type; | |
3653 | int err; | |
3654 | ||
3655 | BUILD_BUG_ON(offsetof(struct floppy_struct, name) != | |
3656 | offsetof(struct compat_floppy_struct, name)); | |
3657 | ||
3658 | if (!(mode & (FMODE_WRITE | FMODE_WRITE_IOCTL))) | |
3659 | return -EPERM; | |
3660 | ||
3661 | memset(&v, 0, sizeof(struct floppy_struct)); | |
3662 | if (copy_from_user(&v, arg, offsetof(struct floppy_struct, name))) | |
3663 | return -EFAULT; | |
3664 | ||
3665 | mutex_lock(&floppy_mutex); | |
3666 | drive = (long)bdev->bd_disk->private_data; | |
3667 | type = ITYPE(UDRS->fd_device); | |
3668 | err = set_geometry(cmd == FDSETPRM32 ? FDSETPRM : FDDEFPRM, | |
3669 | &v, drive, type, bdev); | |
3670 | mutex_unlock(&floppy_mutex); | |
3671 | return err; | |
3672 | } | |
3673 | ||
3674 | static int compat_get_prm(int drive, | |
3675 | struct compat_floppy_struct __user *arg) | |
3676 | { | |
3677 | struct compat_floppy_struct v; | |
3678 | struct floppy_struct *p; | |
3679 | int err; | |
3680 | ||
3681 | memset(&v, 0, sizeof(v)); | |
3682 | mutex_lock(&floppy_mutex); | |
3683 | err = get_floppy_geometry(drive, ITYPE(UDRS->fd_device), &p); | |
3684 | if (err) { | |
3685 | mutex_unlock(&floppy_mutex); | |
3686 | return err; | |
3687 | } | |
3688 | memcpy(&v, p, offsetof(struct floppy_struct, name)); | |
3689 | mutex_unlock(&floppy_mutex); | |
3690 | if (copy_to_user(arg, &v, sizeof(struct compat_floppy_struct))) | |
3691 | return -EFAULT; | |
3692 | return 0; | |
3693 | } | |
3694 | ||
3695 | static int compat_setdrvprm(int drive, | |
3696 | struct compat_floppy_drive_params __user *arg) | |
3697 | { | |
3698 | struct compat_floppy_drive_params v; | |
3699 | ||
3700 | if (!capable(CAP_SYS_ADMIN)) | |
3701 | return -EPERM; | |
3702 | if (copy_from_user(&v, arg, sizeof(struct compat_floppy_drive_params))) | |
3703 | return -EFAULT; | |
3704 | mutex_lock(&floppy_mutex); | |
3705 | UDP->cmos = v.cmos; | |
3706 | UDP->max_dtr = v.max_dtr; | |
3707 | UDP->hlt = v.hlt; | |
3708 | UDP->hut = v.hut; | |
3709 | UDP->srt = v.srt; | |
3710 | UDP->spinup = v.spinup; | |
3711 | UDP->spindown = v.spindown; | |
3712 | UDP->spindown_offset = v.spindown_offset; | |
3713 | UDP->select_delay = v.select_delay; | |
3714 | UDP->rps = v.rps; | |
3715 | UDP->tracks = v.tracks; | |
3716 | UDP->timeout = v.timeout; | |
3717 | UDP->interleave_sect = v.interleave_sect; | |
3718 | UDP->max_errors = v.max_errors; | |
3719 | UDP->flags = v.flags; | |
3720 | UDP->read_track = v.read_track; | |
3721 | memcpy(UDP->autodetect, v.autodetect, sizeof(v.autodetect)); | |
3722 | UDP->checkfreq = v.checkfreq; | |
3723 | UDP->native_format = v.native_format; | |
3724 | mutex_unlock(&floppy_mutex); | |
3725 | return 0; | |
3726 | } | |
3727 | ||
3728 | static int compat_getdrvprm(int drive, | |
3729 | struct compat_floppy_drive_params __user *arg) | |
3730 | { | |
3731 | struct compat_floppy_drive_params v; | |
3732 | ||
3733 | memset(&v, 0, sizeof(struct compat_floppy_drive_params)); | |
3734 | mutex_lock(&floppy_mutex); | |
3735 | v.cmos = UDP->cmos; | |
3736 | v.max_dtr = UDP->max_dtr; | |
3737 | v.hlt = UDP->hlt; | |
3738 | v.hut = UDP->hut; | |
3739 | v.srt = UDP->srt; | |
3740 | v.spinup = UDP->spinup; | |
3741 | v.spindown = UDP->spindown; | |
3742 | v.spindown_offset = UDP->spindown_offset; | |
3743 | v.select_delay = UDP->select_delay; | |
3744 | v.rps = UDP->rps; | |
3745 | v.tracks = UDP->tracks; | |
3746 | v.timeout = UDP->timeout; | |
3747 | v.interleave_sect = UDP->interleave_sect; | |
3748 | v.max_errors = UDP->max_errors; | |
3749 | v.flags = UDP->flags; | |
3750 | v.read_track = UDP->read_track; | |
3751 | memcpy(v.autodetect, UDP->autodetect, sizeof(v.autodetect)); | |
3752 | v.checkfreq = UDP->checkfreq; | |
3753 | v.native_format = UDP->native_format; | |
3754 | mutex_unlock(&floppy_mutex); | |
3755 | ||
3756 | if (copy_from_user(arg, &v, sizeof(struct compat_floppy_drive_params))) | |
3757 | return -EFAULT; | |
3758 | return 0; | |
3759 | } | |
3760 | ||
3761 | static int compat_getdrvstat(int drive, bool poll, | |
3762 | struct compat_floppy_drive_struct __user *arg) | |
3763 | { | |
3764 | struct compat_floppy_drive_struct v; | |
3765 | ||
3766 | memset(&v, 0, sizeof(struct compat_floppy_drive_struct)); | |
3767 | mutex_lock(&floppy_mutex); | |
3768 | ||
3769 | if (poll) { | |
3770 | if (lock_fdc(drive)) | |
3771 | goto Eintr; | |
3772 | if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR) | |
3773 | goto Eintr; | |
3774 | process_fd_request(); | |
3775 | } | |
3776 | v.spinup_date = UDRS->spinup_date; | |
3777 | v.select_date = UDRS->select_date; | |
3778 | v.first_read_date = UDRS->first_read_date; | |
3779 | v.probed_format = UDRS->probed_format; | |
3780 | v.track = UDRS->track; | |
3781 | v.maxblock = UDRS->maxblock; | |
3782 | v.maxtrack = UDRS->maxtrack; | |
3783 | v.generation = UDRS->generation; | |
3784 | v.keep_data = UDRS->keep_data; | |
3785 | v.fd_ref = UDRS->fd_ref; | |
3786 | v.fd_device = UDRS->fd_device; | |
3787 | v.last_checked = UDRS->last_checked; | |
3788 | v.dmabuf = (uintptr_t)UDRS->dmabuf; | |
3789 | v.bufblocks = UDRS->bufblocks; | |
3790 | mutex_unlock(&floppy_mutex); | |
3791 | ||
3792 | if (copy_from_user(arg, &v, sizeof(struct compat_floppy_drive_struct))) | |
3793 | return -EFAULT; | |
3794 | return 0; | |
3795 | Eintr: | |
3796 | mutex_unlock(&floppy_mutex); | |
3797 | return -EINTR; | |
3798 | } | |
3799 | ||
3800 | static int compat_getfdcstat(int drive, | |
3801 | struct compat_floppy_fdc_state __user *arg) | |
3802 | { | |
3803 | struct compat_floppy_fdc_state v32; | |
3804 | struct floppy_fdc_state v; | |
3805 | ||
3806 | mutex_lock(&floppy_mutex); | |
3807 | v = *UFDCS; | |
3808 | mutex_unlock(&floppy_mutex); | |
3809 | ||
3810 | memset(&v32, 0, sizeof(struct compat_floppy_fdc_state)); | |
3811 | v32.spec1 = v.spec1; | |
3812 | v32.spec2 = v.spec2; | |
3813 | v32.dtr = v.dtr; | |
3814 | v32.version = v.version; | |
3815 | v32.dor = v.dor; | |
3816 | v32.address = v.address; | |
3817 | v32.rawcmd = v.rawcmd; | |
3818 | v32.reset = v.reset; | |
3819 | v32.need_configure = v.need_configure; | |
3820 | v32.perp_mode = v.perp_mode; | |
3821 | v32.has_fifo = v.has_fifo; | |
3822 | v32.driver_version = v.driver_version; | |
3823 | memcpy(v32.track, v.track, 4); | |
3824 | if (copy_to_user(arg, &v32, sizeof(struct compat_floppy_fdc_state))) | |
3825 | return -EFAULT; | |
3826 | return 0; | |
3827 | } | |
3828 | ||
3829 | static int compat_werrorget(int drive, | |
3830 | struct compat_floppy_write_errors __user *arg) | |
3831 | { | |
3832 | struct compat_floppy_write_errors v32; | |
3833 | struct floppy_write_errors v; | |
3834 | ||
3835 | memset(&v32, 0, sizeof(struct compat_floppy_write_errors)); | |
3836 | mutex_lock(&floppy_mutex); | |
3837 | v = *UDRWE; | |
3838 | mutex_unlock(&floppy_mutex); | |
3839 | v32.write_errors = v.write_errors; | |
3840 | v32.first_error_sector = v.first_error_sector; | |
3841 | v32.first_error_generation = v.first_error_generation; | |
3842 | v32.last_error_sector = v.last_error_sector; | |
3843 | v32.last_error_generation = v.last_error_generation; | |
3844 | v32.badness = v.badness; | |
3845 | if (copy_to_user(arg, &v32, sizeof(struct compat_floppy_write_errors))) | |
3846 | return -EFAULT; | |
3847 | return 0; | |
3848 | } | |
3849 | ||
3850 | static int fd_compat_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, | |
3851 | unsigned long param) | |
3852 | { | |
3853 | int drive = (long)bdev->bd_disk->private_data; | |
3854 | switch (cmd) { | |
3855 | case FDMSGON: | |
3856 | case FDMSGOFF: | |
3857 | case FDSETEMSGTRESH: | |
3858 | case FDFLUSH: | |
3859 | case FDWERRORCLR: | |
3860 | case FDEJECT: | |
3861 | case FDCLRPRM: | |
3862 | case FDFMTBEG: | |
3863 | case FDRESET: | |
3864 | case FDTWADDLE: | |
3865 | return fd_ioctl(bdev, mode, cmd, param); | |
3866 | case FDSETMAXERRS: | |
3867 | case FDGETMAXERRS: | |
3868 | case FDGETDRVTYP: | |
3869 | case FDFMTEND: | |
3870 | case FDFMTTRK: | |
3871 | case FDRAWCMD: | |
3872 | return fd_ioctl(bdev, mode, cmd, | |
3873 | (unsigned long)compat_ptr(param)); | |
3874 | case FDSETPRM32: | |
3875 | case FDDEFPRM32: | |
3876 | return compat_set_geometry(bdev, mode, cmd, compat_ptr(param)); | |
3877 | case FDGETPRM32: | |
3878 | return compat_get_prm(drive, compat_ptr(param)); | |
3879 | case FDSETDRVPRM32: | |
3880 | return compat_setdrvprm(drive, compat_ptr(param)); | |
3881 | case FDGETDRVPRM32: | |
3882 | return compat_getdrvprm(drive, compat_ptr(param)); | |
3883 | case FDPOLLDRVSTAT32: | |
3884 | return compat_getdrvstat(drive, true, compat_ptr(param)); | |
3885 | case FDGETDRVSTAT32: | |
3886 | return compat_getdrvstat(drive, false, compat_ptr(param)); | |
3887 | case FDGETFDCSTAT32: | |
3888 | return compat_getfdcstat(drive, compat_ptr(param)); | |
3889 | case FDWERRORGET32: | |
3890 | return compat_werrorget(drive, compat_ptr(param)); | |
3891 | } | |
3892 | return -EINVAL; | |
3893 | } | |
3894 | #endif | |
3895 | ||
1da177e4 LT |
3896 | static void __init config_types(void) |
3897 | { | |
b46df356 | 3898 | bool has_drive = false; |
1da177e4 LT |
3899 | int drive; |
3900 | ||
3901 | /* read drive info out of physical CMOS */ | |
3902 | drive = 0; | |
3903 | if (!UDP->cmos) | |
3904 | UDP->cmos = FLOPPY0_TYPE; | |
3905 | drive = 1; | |
3906 | if (!UDP->cmos && FLOPPY1_TYPE) | |
3907 | UDP->cmos = FLOPPY1_TYPE; | |
3908 | ||
06f748c4 | 3909 | /* FIXME: additional physical CMOS drive detection should go here */ |
1da177e4 LT |
3910 | |
3911 | for (drive = 0; drive < N_DRIVE; drive++) { | |
3912 | unsigned int type = UDP->cmos; | |
3913 | struct floppy_drive_params *params; | |
3914 | const char *name = NULL; | |
bcf4299e | 3915 | char temparea[32]; |
1da177e4 | 3916 | |
945f390f | 3917 | if (type < ARRAY_SIZE(default_drive_params)) { |
1da177e4 LT |
3918 | params = &default_drive_params[type].params; |
3919 | if (type) { | |
3920 | name = default_drive_params[type].name; | |
3921 | allowed_drive_mask |= 1 << drive; | |
3922 | } else | |
3923 | allowed_drive_mask &= ~(1 << drive); | |
3924 | } else { | |
3925 | params = &default_drive_params[0].params; | |
bcf4299e RV |
3926 | snprintf(temparea, sizeof(temparea), |
3927 | "unknown type %d (usb?)", type); | |
1da177e4 LT |
3928 | name = temparea; |
3929 | } | |
3930 | if (name) { | |
b46df356 JP |
3931 | const char *prepend; |
3932 | if (!has_drive) { | |
3933 | prepend = ""; | |
3934 | has_drive = true; | |
3935 | pr_info("Floppy drive(s):"); | |
3936 | } else { | |
3937 | prepend = ","; | |
1da177e4 | 3938 | } |
b46df356 JP |
3939 | |
3940 | pr_cont("%s fd%d is %s", prepend, drive, name); | |
1da177e4 LT |
3941 | } |
3942 | *UDP = *params; | |
3943 | } | |
b46df356 JP |
3944 | |
3945 | if (has_drive) | |
3946 | pr_cont("\n"); | |
1da177e4 LT |
3947 | } |
3948 | ||
db2a144b | 3949 | static void floppy_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 3950 | { |
a4af9b48 | 3951 | int drive = (long)disk->private_data; |
1da177e4 | 3952 | |
2a48fc0a | 3953 | mutex_lock(&floppy_mutex); |
b1c82b5c | 3954 | mutex_lock(&open_lock); |
bfa10b8c | 3955 | if (!UDRS->fd_ref--) { |
1da177e4 LT |
3956 | DPRINT("floppy_release with fd_ref == 0"); |
3957 | UDRS->fd_ref = 0; | |
3958 | } | |
3959 | if (!UDRS->fd_ref) | |
3960 | opened_bdev[drive] = NULL; | |
b1c82b5c | 3961 | mutex_unlock(&open_lock); |
2a48fc0a | 3962 | mutex_unlock(&floppy_mutex); |
1da177e4 LT |
3963 | } |
3964 | ||
3965 | /* | |
3966 | * floppy_open check for aliasing (/dev/fd0 can be the same as | |
3967 | * /dev/PS0 etc), and disallows simultaneous access to the same | |
3968 | * drive with different device numbers. | |
3969 | */ | |
a4af9b48 | 3970 | static int floppy_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 3971 | { |
a4af9b48 AV |
3972 | int drive = (long)bdev->bd_disk->private_data; |
3973 | int old_dev, new_dev; | |
1da177e4 LT |
3974 | int try; |
3975 | int res = -EBUSY; | |
3976 | char *tmp; | |
3977 | ||
2a48fc0a | 3978 | mutex_lock(&floppy_mutex); |
b1c82b5c | 3979 | mutex_lock(&open_lock); |
1da177e4 | 3980 | old_dev = UDRS->fd_device; |
a4af9b48 | 3981 | if (opened_bdev[drive] && opened_bdev[drive] != bdev) |
1da177e4 LT |
3982 | goto out2; |
3983 | ||
3984 | if (!UDRS->fd_ref && (UDP->flags & FD_BROKEN_DCL)) { | |
e0298536 JP |
3985 | set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); |
3986 | set_bit(FD_VERIFY_BIT, &UDRS->flags); | |
1da177e4 LT |
3987 | } |
3988 | ||
bfa10b8c | 3989 | UDRS->fd_ref++; |
1da177e4 | 3990 | |
a4af9b48 | 3991 | opened_bdev[drive] = bdev; |
1da177e4 LT |
3992 | |
3993 | res = -ENXIO; | |
3994 | ||
3995 | if (!floppy_track_buffer) { | |
3996 | /* if opening an ED drive, reserve a big buffer, | |
3997 | * else reserve a small one */ | |
3998 | if ((UDP->cmos == 6) || (UDP->cmos == 5)) | |
3999 | try = 64; /* Only 48 actually useful */ | |
4000 | else | |
4001 | try = 32; /* Only 24 actually useful */ | |
4002 | ||
4003 | tmp = (char *)fd_dma_mem_alloc(1024 * try); | |
4004 | if (!tmp && !floppy_track_buffer) { | |
4005 | try >>= 1; /* buffer only one side */ | |
4006 | INFBOUND(try, 16); | |
4007 | tmp = (char *)fd_dma_mem_alloc(1024 * try); | |
4008 | } | |
a81ee544 | 4009 | if (!tmp && !floppy_track_buffer) |
1da177e4 | 4010 | fallback_on_nodma_alloc(&tmp, 2048 * try); |
1da177e4 LT |
4011 | if (!tmp && !floppy_track_buffer) { |
4012 | DPRINT("Unable to allocate DMA memory\n"); | |
4013 | goto out; | |
4014 | } | |
4015 | if (floppy_track_buffer) { | |
4016 | if (tmp) | |
4017 | fd_dma_mem_free((unsigned long)tmp, try * 1024); | |
4018 | } else { | |
4019 | buffer_min = buffer_max = -1; | |
4020 | floppy_track_buffer = tmp; | |
4021 | max_buffer_sectors = try; | |
4022 | } | |
4023 | } | |
4024 | ||
a4af9b48 AV |
4025 | new_dev = MINOR(bdev->bd_dev); |
4026 | UDRS->fd_device = new_dev; | |
4027 | set_capacity(disks[drive], floppy_sizes[new_dev]); | |
4028 | if (old_dev != -1 && old_dev != new_dev) { | |
1da177e4 LT |
4029 | if (buffer_drive == drive) |
4030 | buffer_track = -1; | |
4031 | } | |
4032 | ||
1da177e4 LT |
4033 | if (UFDCS->rawcmd == 1) |
4034 | UFDCS->rawcmd = 2; | |
4035 | ||
f2791e7e JA |
4036 | if (!(mode & FMODE_NDELAY)) { |
4037 | if (mode & (FMODE_READ|FMODE_WRITE)) { | |
4038 | UDRS->last_checked = 0; | |
4039 | clear_bit(FD_OPEN_SHOULD_FAIL_BIT, &UDRS->flags); | |
4040 | check_disk_change(bdev); | |
4041 | if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags)) | |
4042 | goto out; | |
4043 | if (test_bit(FD_OPEN_SHOULD_FAIL_BIT, &UDRS->flags)) | |
4044 | goto out; | |
4045 | } | |
4046 | res = -EROFS; | |
4047 | if ((mode & FMODE_WRITE) && | |
4048 | !test_bit(FD_DISK_WRITABLE_BIT, &UDRS->flags)) | |
4049 | goto out; | |
4050 | } | |
b1c82b5c | 4051 | mutex_unlock(&open_lock); |
2a48fc0a | 4052 | mutex_unlock(&floppy_mutex); |
1da177e4 LT |
4053 | return 0; |
4054 | out: | |
bfa10b8c JK |
4055 | UDRS->fd_ref--; |
4056 | ||
1da177e4 LT |
4057 | if (!UDRS->fd_ref) |
4058 | opened_bdev[drive] = NULL; | |
1da177e4 | 4059 | out2: |
b1c82b5c | 4060 | mutex_unlock(&open_lock); |
2a48fc0a | 4061 | mutex_unlock(&floppy_mutex); |
1da177e4 LT |
4062 | return res; |
4063 | } | |
4064 | ||
4065 | /* | |
4066 | * Check if the disk has been changed or if a change has been faked. | |
4067 | */ | |
1a8a74f0 TH |
4068 | static unsigned int floppy_check_events(struct gendisk *disk, |
4069 | unsigned int clearing) | |
1da177e4 LT |
4070 | { |
4071 | int drive = (long)disk->private_data; | |
4072 | ||
e0298536 JP |
4073 | if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) || |
4074 | test_bit(FD_VERIFY_BIT, &UDRS->flags)) | |
1a8a74f0 | 4075 | return DISK_EVENT_MEDIA_CHANGE; |
1da177e4 | 4076 | |
50297cbf | 4077 | if (time_after(jiffies, UDRS->last_checked + UDP->checkfreq)) { |
a0c80efe JK |
4078 | if (lock_fdc(drive)) |
4079 | return -EINTR; | |
74f63f46 | 4080 | poll_drive(false, 0); |
1da177e4 | 4081 | process_fd_request(); |
1da177e4 LT |
4082 | } |
4083 | ||
e0298536 JP |
4084 | if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) || |
4085 | test_bit(FD_VERIFY_BIT, &UDRS->flags) || | |
1da177e4 | 4086 | test_bit(drive, &fake_change) || |
2b51dca7 | 4087 | drive_no_geom(drive)) |
1a8a74f0 | 4088 | return DISK_EVENT_MEDIA_CHANGE; |
1da177e4 LT |
4089 | return 0; |
4090 | } | |
4091 | ||
4092 | /* | |
4093 | * This implements "read block 0" for floppy_revalidate(). | |
4094 | * Needed for format autodetection, checking whether there is | |
4095 | * a disk in the drive, and whether that disk is writable. | |
4096 | */ | |
4097 | ||
7b7b68bb JK |
4098 | struct rb0_cbdata { |
4099 | int drive; | |
4100 | struct completion complete; | |
4101 | }; | |
4102 | ||
4246a0b6 | 4103 | static void floppy_rb0_cb(struct bio *bio) |
1da177e4 | 4104 | { |
7b7b68bb JK |
4105 | struct rb0_cbdata *cbdata = (struct rb0_cbdata *)bio->bi_private; |
4106 | int drive = cbdata->drive; | |
4107 | ||
4e4cbee9 | 4108 | if (bio->bi_status) { |
4246a0b6 | 4109 | pr_info("floppy: error %d while reading block 0\n", |
4e4cbee9 | 4110 | bio->bi_status); |
7b7b68bb JK |
4111 | set_bit(FD_OPEN_SHOULD_FAIL_BIT, &UDRS->flags); |
4112 | } | |
4113 | complete(&cbdata->complete); | |
1da177e4 LT |
4114 | } |
4115 | ||
7b7b68bb | 4116 | static int __floppy_read_block_0(struct block_device *bdev, int drive) |
1da177e4 LT |
4117 | { |
4118 | struct bio bio; | |
4119 | struct bio_vec bio_vec; | |
1da177e4 | 4120 | struct page *page; |
7b7b68bb | 4121 | struct rb0_cbdata cbdata; |
1da177e4 LT |
4122 | size_t size; |
4123 | ||
4124 | page = alloc_page(GFP_NOIO); | |
4125 | if (!page) { | |
4126 | process_fd_request(); | |
4127 | return -ENOMEM; | |
4128 | } | |
4129 | ||
4130 | size = bdev->bd_block_size; | |
4131 | if (!size) | |
4132 | size = 1024; | |
4133 | ||
7b7b68bb JK |
4134 | cbdata.drive = drive; |
4135 | ||
3a83f467 | 4136 | bio_init(&bio, &bio_vec, 1); |
1da177e4 | 4137 | bio.bi_bdev = bdev; |
2c73a603 ML |
4138 | bio_add_page(&bio, page, size, 0); |
4139 | ||
4f024f37 | 4140 | bio.bi_iter.bi_sector = 0; |
6314a108 | 4141 | bio.bi_flags |= (1 << BIO_QUIET); |
7b7b68bb JK |
4142 | bio.bi_private = &cbdata; |
4143 | bio.bi_end_io = floppy_rb0_cb; | |
95fe6c1a | 4144 | bio_set_op_attrs(&bio, REQ_OP_READ, 0); |
1da177e4 | 4145 | |
4e49ea4a | 4146 | submit_bio(&bio); |
1da177e4 | 4147 | process_fd_request(); |
7b7b68bb JK |
4148 | |
4149 | init_completion(&cbdata.complete); | |
4150 | wait_for_completion(&cbdata.complete); | |
1da177e4 LT |
4151 | |
4152 | __free_page(page); | |
4153 | ||
4154 | return 0; | |
4155 | } | |
4156 | ||
4157 | /* revalidate the floppy disk, i.e. trigger format autodetection by reading | |
4158 | * the bootblock (block 0). "Autodetection" is also needed to check whether | |
4159 | * there is a disk in the drive at all... Thus we also do it for fixed | |
4160 | * geometry formats */ | |
4161 | static int floppy_revalidate(struct gendisk *disk) | |
4162 | { | |
4163 | int drive = (long)disk->private_data; | |
1da177e4 LT |
4164 | int cf; |
4165 | int res = 0; | |
4166 | ||
e0298536 JP |
4167 | if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) || |
4168 | test_bit(FD_VERIFY_BIT, &UDRS->flags) || | |
2b51dca7 PE |
4169 | test_bit(drive, &fake_change) || |
4170 | drive_no_geom(drive)) { | |
01b6b67e SH |
4171 | if (WARN(atomic_read(&usage_count) == 0, |
4172 | "VFS: revalidate called on non-open device.\n")) | |
1da177e4 | 4173 | return -EFAULT; |
01b6b67e | 4174 | |
a0c80efe JK |
4175 | res = lock_fdc(drive); |
4176 | if (res) | |
4177 | return res; | |
e0298536 JP |
4178 | cf = (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) || |
4179 | test_bit(FD_VERIFY_BIT, &UDRS->flags)); | |
2b51dca7 | 4180 | if (!(cf || test_bit(drive, &fake_change) || drive_no_geom(drive))) { |
1da177e4 LT |
4181 | process_fd_request(); /*already done by another thread */ |
4182 | return 0; | |
4183 | } | |
4184 | UDRS->maxblock = 0; | |
4185 | UDRS->maxtrack = 0; | |
4186 | if (buffer_drive == drive) | |
4187 | buffer_track = -1; | |
4188 | clear_bit(drive, &fake_change); | |
e0298536 | 4189 | clear_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); |
1da177e4 LT |
4190 | if (cf) |
4191 | UDRS->generation++; | |
2b51dca7 | 4192 | if (drive_no_geom(drive)) { |
1da177e4 | 4193 | /* auto-sensing */ |
7b7b68bb | 4194 | res = __floppy_read_block_0(opened_bdev[drive], drive); |
1da177e4 LT |
4195 | } else { |
4196 | if (cf) | |
74f63f46 | 4197 | poll_drive(false, FD_RAW_NEED_DISK); |
1da177e4 LT |
4198 | process_fd_request(); |
4199 | } | |
4200 | } | |
4201 | set_capacity(disk, floppy_sizes[UDRS->fd_device]); | |
4202 | return res; | |
4203 | } | |
4204 | ||
83d5cde4 | 4205 | static const struct block_device_operations floppy_fops = { |
06f748c4 | 4206 | .owner = THIS_MODULE, |
a4af9b48 AV |
4207 | .open = floppy_open, |
4208 | .release = floppy_release, | |
8a6cfeb6 | 4209 | .ioctl = fd_ioctl, |
06f748c4 | 4210 | .getgeo = fd_getgeo, |
1a8a74f0 | 4211 | .check_events = floppy_check_events, |
06f748c4 | 4212 | .revalidate_disk = floppy_revalidate, |
229b53c9 AV |
4213 | #ifdef CONFIG_COMPAT |
4214 | .compat_ioctl = fd_compat_ioctl, | |
4215 | #endif | |
1da177e4 | 4216 | }; |
1da177e4 | 4217 | |
1da177e4 LT |
4218 | /* |
4219 | * Floppy Driver initialization | |
4220 | * ============================= | |
4221 | */ | |
4222 | ||
4223 | /* Determine the floppy disk controller type */ | |
4224 | /* This routine was written by David C. Niemi */ | |
4225 | static char __init get_fdc_version(void) | |
4226 | { | |
4227 | int r; | |
4228 | ||
4229 | output_byte(FD_DUMPREGS); /* 82072 and better know DUMPREGS */ | |
4230 | if (FDCS->reset) | |
4231 | return FDC_NONE; | |
d7b2b2ec JP |
4232 | r = result(); |
4233 | if (r <= 0x00) | |
1da177e4 LT |
4234 | return FDC_NONE; /* No FDC present ??? */ |
4235 | if ((r == 1) && (reply_buffer[0] == 0x80)) { | |
b46df356 | 4236 | pr_info("FDC %d is an 8272A\n", fdc); |
1da177e4 LT |
4237 | return FDC_8272A; /* 8272a/765 don't know DUMPREGS */ |
4238 | } | |
4239 | if (r != 10) { | |
b46df356 JP |
4240 | pr_info("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n", |
4241 | fdc, r); | |
1da177e4 LT |
4242 | return FDC_UNKNOWN; |
4243 | } | |
4244 | ||
4245 | if (!fdc_configure()) { | |
b46df356 | 4246 | pr_info("FDC %d is an 82072\n", fdc); |
1da177e4 LT |
4247 | return FDC_82072; /* 82072 doesn't know CONFIGURE */ |
4248 | } | |
4249 | ||
4250 | output_byte(FD_PERPENDICULAR); | |
4251 | if (need_more_output() == MORE_OUTPUT) { | |
4252 | output_byte(0); | |
4253 | } else { | |
b46df356 | 4254 | pr_info("FDC %d is an 82072A\n", fdc); |
1da177e4 LT |
4255 | return FDC_82072A; /* 82072A as found on Sparcs. */ |
4256 | } | |
4257 | ||
4258 | output_byte(FD_UNLOCK); | |
4259 | r = result(); | |
4260 | if ((r == 1) && (reply_buffer[0] == 0x80)) { | |
b46df356 | 4261 | pr_info("FDC %d is a pre-1991 82077\n", fdc); |
d7b2b2ec | 4262 | return FDC_82077_ORIG; /* Pre-1991 82077, doesn't know |
1da177e4 LT |
4263 | * LOCK/UNLOCK */ |
4264 | } | |
4265 | if ((r != 1) || (reply_buffer[0] != 0x00)) { | |
b46df356 JP |
4266 | pr_info("FDC %d init: UNLOCK: unexpected return of %d bytes.\n", |
4267 | fdc, r); | |
1da177e4 LT |
4268 | return FDC_UNKNOWN; |
4269 | } | |
4270 | output_byte(FD_PARTID); | |
4271 | r = result(); | |
4272 | if (r != 1) { | |
b46df356 JP |
4273 | pr_info("FDC %d init: PARTID: unexpected return of %d bytes.\n", |
4274 | fdc, r); | |
1da177e4 LT |
4275 | return FDC_UNKNOWN; |
4276 | } | |
4277 | if (reply_buffer[0] == 0x80) { | |
b46df356 | 4278 | pr_info("FDC %d is a post-1991 82077\n", fdc); |
1da177e4 LT |
4279 | return FDC_82077; /* Revised 82077AA passes all the tests */ |
4280 | } | |
4281 | switch (reply_buffer[0] >> 5) { | |
4282 | case 0x0: | |
4283 | /* Either a 82078-1 or a 82078SL running at 5Volt */ | |
b46df356 | 4284 | pr_info("FDC %d is an 82078.\n", fdc); |
1da177e4 LT |
4285 | return FDC_82078; |
4286 | case 0x1: | |
b46df356 | 4287 | pr_info("FDC %d is a 44pin 82078\n", fdc); |
1da177e4 LT |
4288 | return FDC_82078; |
4289 | case 0x2: | |
b46df356 | 4290 | pr_info("FDC %d is a S82078B\n", fdc); |
1da177e4 LT |
4291 | return FDC_S82078B; |
4292 | case 0x3: | |
b46df356 | 4293 | pr_info("FDC %d is a National Semiconductor PC87306\n", fdc); |
1da177e4 LT |
4294 | return FDC_87306; |
4295 | default: | |
b46df356 JP |
4296 | pr_info("FDC %d init: 82078 variant with unknown PARTID=%d.\n", |
4297 | fdc, reply_buffer[0] >> 5); | |
1da177e4 LT |
4298 | return FDC_82078_UNKN; |
4299 | } | |
4300 | } /* get_fdc_version */ | |
4301 | ||
4302 | /* lilo configuration */ | |
4303 | ||
4304 | static void __init floppy_set_flags(int *ints, int param, int param2) | |
4305 | { | |
4306 | int i; | |
4307 | ||
4308 | for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) { | |
4309 | if (param) | |
4310 | default_drive_params[i].params.flags |= param2; | |
4311 | else | |
4312 | default_drive_params[i].params.flags &= ~param2; | |
4313 | } | |
4314 | DPRINT("%s flag 0x%x\n", param2 ? "Setting" : "Clearing", param); | |
4315 | } | |
4316 | ||
4317 | static void __init daring(int *ints, int param, int param2) | |
4318 | { | |
4319 | int i; | |
4320 | ||
4321 | for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) { | |
4322 | if (param) { | |
4323 | default_drive_params[i].params.select_delay = 0; | |
4324 | default_drive_params[i].params.flags |= | |
4325 | FD_SILENT_DCL_CLEAR; | |
4326 | } else { | |
4327 | default_drive_params[i].params.select_delay = | |
4328 | 2 * HZ / 100; | |
4329 | default_drive_params[i].params.flags &= | |
4330 | ~FD_SILENT_DCL_CLEAR; | |
4331 | } | |
4332 | } | |
4333 | DPRINT("Assuming %s floppy hardware\n", param ? "standard" : "broken"); | |
4334 | } | |
4335 | ||
4336 | static void __init set_cmos(int *ints, int dummy, int dummy2) | |
4337 | { | |
4338 | int current_drive = 0; | |
4339 | ||
4340 | if (ints[0] != 2) { | |
4341 | DPRINT("wrong number of parameters for CMOS\n"); | |
4342 | return; | |
4343 | } | |
4344 | current_drive = ints[1]; | |
4345 | if (current_drive < 0 || current_drive >= 8) { | |
4346 | DPRINT("bad drive for set_cmos\n"); | |
4347 | return; | |
4348 | } | |
4349 | #if N_FDC > 1 | |
4350 | if (current_drive >= 4 && !FDC2) | |
4351 | FDC2 = 0x370; | |
4352 | #endif | |
4353 | DP->cmos = ints[2]; | |
4354 | DPRINT("setting CMOS code to %d\n", ints[2]); | |
4355 | } | |
4356 | ||
4357 | static struct param_table { | |
4358 | const char *name; | |
4359 | void (*fn) (int *ints, int param, int param2); | |
4360 | int *var; | |
4361 | int def_param; | |
4362 | int param2; | |
4363 | } config_params[] __initdata = { | |
4364 | {"allowed_drive_mask", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */ | |
4365 | {"all_drives", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */ | |
4366 | {"asus_pci", NULL, &allowed_drive_mask, 0x33, 0}, | |
4367 | {"irq", NULL, &FLOPPY_IRQ, 6, 0}, | |
4368 | {"dma", NULL, &FLOPPY_DMA, 2, 0}, | |
4369 | {"daring", daring, NULL, 1, 0}, | |
4370 | #if N_FDC > 1 | |
4371 | {"two_fdc", NULL, &FDC2, 0x370, 0}, | |
4372 | {"one_fdc", NULL, &FDC2, 0, 0}, | |
4373 | #endif | |
4374 | {"thinkpad", floppy_set_flags, NULL, 1, FD_INVERTED_DCL}, | |
4375 | {"broken_dcl", floppy_set_flags, NULL, 1, FD_BROKEN_DCL}, | |
4376 | {"messages", floppy_set_flags, NULL, 1, FTD_MSG}, | |
4377 | {"silent_dcl_clear", floppy_set_flags, NULL, 1, FD_SILENT_DCL_CLEAR}, | |
4378 | {"debug", floppy_set_flags, NULL, 1, FD_DEBUG}, | |
4379 | {"nodma", NULL, &can_use_virtual_dma, 1, 0}, | |
4380 | {"omnibook", NULL, &can_use_virtual_dma, 1, 0}, | |
4381 | {"yesdma", NULL, &can_use_virtual_dma, 0, 0}, | |
4382 | {"fifo_depth", NULL, &fifo_depth, 0xa, 0}, | |
4383 | {"nofifo", NULL, &no_fifo, 0x20, 0}, | |
4384 | {"usefifo", NULL, &no_fifo, 0, 0}, | |
4385 | {"cmos", set_cmos, NULL, 0, 0}, | |
4386 | {"slow", NULL, &slow_floppy, 1, 0}, | |
4387 | {"unexpected_interrupts", NULL, &print_unex, 1, 0}, | |
4388 | {"no_unexpected_interrupts", NULL, &print_unex, 0, 0}, | |
4389 | {"L40SX", NULL, &print_unex, 0, 0} | |
4390 | ||
4391 | EXTRA_FLOPPY_PARAMS | |
4392 | }; | |
4393 | ||
4394 | static int __init floppy_setup(char *str) | |
4395 | { | |
4396 | int i; | |
4397 | int param; | |
4398 | int ints[11]; | |
4399 | ||
4400 | str = get_options(str, ARRAY_SIZE(ints), ints); | |
4401 | if (str) { | |
4402 | for (i = 0; i < ARRAY_SIZE(config_params); i++) { | |
4403 | if (strcmp(str, config_params[i].name) == 0) { | |
4404 | if (ints[0]) | |
4405 | param = ints[1]; | |
4406 | else | |
4407 | param = config_params[i].def_param; | |
4408 | if (config_params[i].fn) | |
bb57f0c6 JP |
4409 | config_params[i].fn(ints, param, |
4410 | config_params[i]. | |
4411 | param2); | |
1da177e4 LT |
4412 | if (config_params[i].var) { |
4413 | DPRINT("%s=%d\n", str, param); | |
4414 | *config_params[i].var = param; | |
4415 | } | |
4416 | return 1; | |
4417 | } | |
4418 | } | |
4419 | } | |
4420 | if (str) { | |
4421 | DPRINT("unknown floppy option [%s]\n", str); | |
4422 | ||
4423 | DPRINT("allowed options are:"); | |
4424 | for (i = 0; i < ARRAY_SIZE(config_params); i++) | |
b46df356 JP |
4425 | pr_cont(" %s", config_params[i].name); |
4426 | pr_cont("\n"); | |
1da177e4 LT |
4427 | } else |
4428 | DPRINT("botched floppy option\n"); | |
31c00fc1 | 4429 | DPRINT("Read Documentation/blockdev/floppy.txt\n"); |
1da177e4 LT |
4430 | return 0; |
4431 | } | |
4432 | ||
4433 | static int have_no_fdc = -ENODEV; | |
4434 | ||
9a8af6b3 AM |
4435 | static ssize_t floppy_cmos_show(struct device *dev, |
4436 | struct device_attribute *attr, char *buf) | |
94fd0db7 | 4437 | { |
71b3e0c1 | 4438 | struct platform_device *p = to_platform_device(dev); |
9a8af6b3 | 4439 | int drive; |
94fd0db7 | 4440 | |
9a8af6b3 AM |
4441 | drive = p->id; |
4442 | return sprintf(buf, "%X\n", UDP->cmos); | |
94fd0db7 | 4443 | } |
48c8cee6 | 4444 | |
be1c0fbf | 4445 | static DEVICE_ATTR(cmos, S_IRUGO, floppy_cmos_show, NULL); |
94fd0db7 | 4446 | |
b7f120b2 TI |
4447 | static struct attribute *floppy_dev_attrs[] = { |
4448 | &dev_attr_cmos.attr, | |
4449 | NULL | |
4450 | }; | |
4451 | ||
4452 | ATTRIBUTE_GROUPS(floppy_dev); | |
4453 | ||
1da177e4 LT |
4454 | static void floppy_device_release(struct device *dev) |
4455 | { | |
1da177e4 LT |
4456 | } |
4457 | ||
c90cd332 | 4458 | static int floppy_resume(struct device *dev) |
5e50b9ef OZ |
4459 | { |
4460 | int fdc; | |
4461 | ||
4462 | for (fdc = 0; fdc < N_FDC; fdc++) | |
4463 | if (FDCS->address != -1) | |
74f63f46 | 4464 | user_reset_fdc(-1, FD_RESET_ALWAYS, false); |
5e50b9ef OZ |
4465 | |
4466 | return 0; | |
4467 | } | |
4468 | ||
47145210 | 4469 | static const struct dev_pm_ops floppy_pm_ops = { |
5e50b9ef | 4470 | .resume = floppy_resume, |
c90cd332 FP |
4471 | .restore = floppy_resume, |
4472 | }; | |
4473 | ||
4474 | static struct platform_driver floppy_driver = { | |
5e50b9ef | 4475 | .driver = { |
bb57f0c6 JP |
4476 | .name = "floppy", |
4477 | .pm = &floppy_pm_ops, | |
5e50b9ef OZ |
4478 | }, |
4479 | }; | |
4480 | ||
94fd0db7 | 4481 | static struct platform_device floppy_device[N_DRIVE]; |
1da177e4 | 4482 | |
8d3ab4eb HRK |
4483 | static bool floppy_available(int drive) |
4484 | { | |
4485 | if (!(allowed_drive_mask & (1 << drive))) | |
4486 | return false; | |
4487 | if (fdc_state[FDC(drive)].version == FDC_NONE) | |
4488 | return false; | |
4489 | return true; | |
4490 | } | |
4491 | ||
1da177e4 LT |
4492 | static struct kobject *floppy_find(dev_t dev, int *part, void *data) |
4493 | { | |
4494 | int drive = (*part & 3) | ((*part & 0x80) >> 5); | |
8d3ab4eb | 4495 | if (drive >= N_DRIVE || !floppy_available(drive)) |
1da177e4 | 4496 | return NULL; |
945f390f | 4497 | if (((*part >> 2) & 0x1f) >= ARRAY_SIZE(floppy_type)) |
1da177e4 LT |
4498 | return NULL; |
4499 | *part = 0; | |
4500 | return get_disk(disks[drive]); | |
4501 | } | |
4502 | ||
0cc15d03 | 4503 | static int __init do_floppy_init(void) |
1da177e4 | 4504 | { |
1a4ae43e | 4505 | int i, unit, drive, err; |
1da177e4 | 4506 | |
285203c8 SH |
4507 | set_debugt(); |
4508 | interruptjiffies = resultjiffies = jiffies; | |
4509 | ||
68e1ee62 | 4510 | #if defined(CONFIG_PPC) |
ef16b519 OH |
4511 | if (check_legacy_ioport(FDC1)) |
4512 | return -ENODEV; | |
4513 | #endif | |
4514 | ||
1da177e4 LT |
4515 | raw_cmd = NULL; |
4516 | ||
b54e1f88 HRK |
4517 | floppy_wq = alloc_ordered_workqueue("floppy", 0); |
4518 | if (!floppy_wq) | |
4519 | return -ENOMEM; | |
4520 | ||
1a4ae43e HRK |
4521 | for (drive = 0; drive < N_DRIVE; drive++) { |
4522 | disks[drive] = alloc_disk(1); | |
4523 | if (!disks[drive]) { | |
1da177e4 LT |
4524 | err = -ENOMEM; |
4525 | goto out_put_disk; | |
4526 | } | |
4527 | ||
1a4ae43e HRK |
4528 | disks[drive]->queue = blk_init_queue(do_fd_request, &floppy_lock); |
4529 | if (!disks[drive]->queue) { | |
48821184 | 4530 | err = -ENOMEM; |
b54e1f88 | 4531 | goto out_put_disk; |
48821184 JA |
4532 | } |
4533 | ||
8fc45044 | 4534 | blk_queue_bounce_limit(disks[drive]->queue, BLK_BOUNCE_HIGH); |
1a4ae43e HRK |
4535 | blk_queue_max_hw_sectors(disks[drive]->queue, 64); |
4536 | disks[drive]->major = FLOPPY_MAJOR; | |
4537 | disks[drive]->first_minor = TOMINOR(drive); | |
4538 | disks[drive]->fops = &floppy_fops; | |
4539 | sprintf(disks[drive]->disk_name, "fd%d", drive); | |
1da177e4 | 4540 | |
68219bdf | 4541 | setup_timer(&motor_off_timer[drive], motor_off_callback, drive); |
1da177e4 LT |
4542 | } |
4543 | ||
1da177e4 LT |
4544 | err = register_blkdev(FLOPPY_MAJOR, "fd"); |
4545 | if (err) | |
8ab5e4c1 | 4546 | goto out_put_disk; |
1da177e4 | 4547 | |
5e50b9ef OZ |
4548 | err = platform_driver_register(&floppy_driver); |
4549 | if (err) | |
4550 | goto out_unreg_blkdev; | |
4551 | ||
1da177e4 LT |
4552 | blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE, |
4553 | floppy_find, NULL, NULL); | |
4554 | ||
4555 | for (i = 0; i < 256; i++) | |
4556 | if (ITYPE(i)) | |
4557 | floppy_sizes[i] = floppy_type[ITYPE(i)].size; | |
4558 | else | |
4559 | floppy_sizes[i] = MAX_DISK_SIZE << 1; | |
4560 | ||
73507e6c | 4561 | reschedule_timeout(MAXTIMEOUT, "floppy init"); |
1da177e4 LT |
4562 | config_types(); |
4563 | ||
4564 | for (i = 0; i < N_FDC; i++) { | |
4565 | fdc = i; | |
b87c9e0a | 4566 | memset(FDCS, 0, sizeof(*FDCS)); |
1da177e4 LT |
4567 | FDCS->dtr = -1; |
4568 | FDCS->dor = 0x4; | |
4569 | #if defined(__sparc__) || defined(__mc68000__) | |
96534f1d | 4570 | /*sparcs/sun3x don't have a DOR reset which we can fall back on to */ |
1da177e4 LT |
4571 | #ifdef __mc68000__ |
4572 | if (MACH_IS_SUN3X) | |
4573 | #endif | |
4574 | FDCS->version = FDC_82072A; | |
4575 | #endif | |
4576 | } | |
4577 | ||
4578 | use_virtual_dma = can_use_virtual_dma & 1; | |
1da177e4 LT |
4579 | fdc_state[0].address = FDC1; |
4580 | if (fdc_state[0].address == -1) { | |
070ad7e7 | 4581 | cancel_delayed_work(&fd_timeout); |
1da177e4 LT |
4582 | err = -ENODEV; |
4583 | goto out_unreg_region; | |
4584 | } | |
4585 | #if N_FDC > 1 | |
4586 | fdc_state[1].address = FDC2; | |
4587 | #endif | |
4588 | ||
4589 | fdc = 0; /* reset fdc in case of unexpected interrupt */ | |
4590 | err = floppy_grab_irq_and_dma(); | |
4591 | if (err) { | |
070ad7e7 | 4592 | cancel_delayed_work(&fd_timeout); |
1da177e4 LT |
4593 | err = -EBUSY; |
4594 | goto out_unreg_region; | |
4595 | } | |
4596 | ||
4597 | /* initialise drive state */ | |
4598 | for (drive = 0; drive < N_DRIVE; drive++) { | |
b87c9e0a JP |
4599 | memset(UDRS, 0, sizeof(*UDRS)); |
4600 | memset(UDRWE, 0, sizeof(*UDRWE)); | |
e0298536 JP |
4601 | set_bit(FD_DISK_NEWCHANGE_BIT, &UDRS->flags); |
4602 | set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); | |
4603 | set_bit(FD_VERIFY_BIT, &UDRS->flags); | |
1da177e4 LT |
4604 | UDRS->fd_device = -1; |
4605 | floppy_track_buffer = NULL; | |
4606 | max_buffer_sectors = 0; | |
4607 | } | |
4608 | /* | |
4609 | * Small 10 msec delay to let through any interrupt that | |
4610 | * initialization might have triggered, to not | |
4611 | * confuse detection: | |
4612 | */ | |
4613 | msleep(10); | |
4614 | ||
4615 | for (i = 0; i < N_FDC; i++) { | |
4616 | fdc = i; | |
4617 | FDCS->driver_version = FD_DRIVER_VERSION; | |
4618 | for (unit = 0; unit < 4; unit++) | |
4619 | FDCS->track[unit] = 0; | |
4620 | if (FDCS->address == -1) | |
4621 | continue; | |
4622 | FDCS->rawcmd = 2; | |
74f63f46 | 4623 | if (user_reset_fdc(-1, FD_RESET_ALWAYS, false)) { |
1da177e4 | 4624 | /* free ioports reserved by floppy_grab_irq_and_dma() */ |
5a74db06 | 4625 | floppy_release_regions(fdc); |
1da177e4 LT |
4626 | FDCS->address = -1; |
4627 | FDCS->version = FDC_NONE; | |
4628 | continue; | |
4629 | } | |
4630 | /* Try to determine the floppy controller type */ | |
4631 | FDCS->version = get_fdc_version(); | |
4632 | if (FDCS->version == FDC_NONE) { | |
4633 | /* free ioports reserved by floppy_grab_irq_and_dma() */ | |
5a74db06 | 4634 | floppy_release_regions(fdc); |
1da177e4 LT |
4635 | FDCS->address = -1; |
4636 | continue; | |
4637 | } | |
4638 | if (can_use_virtual_dma == 2 && FDCS->version < FDC_82072A) | |
4639 | can_use_virtual_dma = 0; | |
4640 | ||
4641 | have_no_fdc = 0; | |
4642 | /* Not all FDCs seem to be able to handle the version command | |
4643 | * properly, so force a reset for the standard FDC clones, | |
4644 | * to avoid interrupt garbage. | |
4645 | */ | |
74f63f46 | 4646 | user_reset_fdc(-1, FD_RESET_ALWAYS, false); |
1da177e4 LT |
4647 | } |
4648 | fdc = 0; | |
070ad7e7 | 4649 | cancel_delayed_work(&fd_timeout); |
1da177e4 | 4650 | current_drive = 0; |
29f1c784 | 4651 | initialized = true; |
1da177e4 LT |
4652 | if (have_no_fdc) { |
4653 | DPRINT("no floppy controllers found\n"); | |
4654 | err = have_no_fdc; | |
070ad7e7 | 4655 | goto out_release_dma; |
1da177e4 LT |
4656 | } |
4657 | ||
1da177e4 | 4658 | for (drive = 0; drive < N_DRIVE; drive++) { |
8d3ab4eb | 4659 | if (!floppy_available(drive)) |
1da177e4 | 4660 | continue; |
94fd0db7 HR |
4661 | |
4662 | floppy_device[drive].name = floppy_device_name; | |
4663 | floppy_device[drive].id = drive; | |
4664 | floppy_device[drive].dev.release = floppy_device_release; | |
b7f120b2 | 4665 | floppy_device[drive].dev.groups = floppy_dev_groups; |
94fd0db7 HR |
4666 | |
4667 | err = platform_device_register(&floppy_device[drive]); | |
4668 | if (err) | |
d60e7ec1 | 4669 | goto out_remove_drives; |
94fd0db7 | 4670 | |
1da177e4 LT |
4671 | /* to be cleaned up... */ |
4672 | disks[drive]->private_data = (void *)(long)drive; | |
1da177e4 | 4673 | disks[drive]->flags |= GENHD_FL_REMOVABLE; |
0d52c756 | 4674 | device_add_disk(&floppy_device[drive].dev, disks[drive]); |
1da177e4 LT |
4675 | } |
4676 | ||
4677 | return 0; | |
4678 | ||
d60e7ec1 HRK |
4679 | out_remove_drives: |
4680 | while (drive--) { | |
8d3ab4eb | 4681 | if (floppy_available(drive)) { |
d60e7ec1 | 4682 | del_gendisk(disks[drive]); |
d60e7ec1 HRK |
4683 | platform_device_unregister(&floppy_device[drive]); |
4684 | } | |
4685 | } | |
070ad7e7 | 4686 | out_release_dma: |
575cfc67 | 4687 | if (atomic_read(&usage_count)) |
1da177e4 LT |
4688 | floppy_release_irq_and_dma(); |
4689 | out_unreg_region: | |
4690 | blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); | |
5e50b9ef | 4691 | platform_driver_unregister(&floppy_driver); |
1da177e4 LT |
4692 | out_unreg_blkdev: |
4693 | unregister_blkdev(FLOPPY_MAJOR, "fd"); | |
1da177e4 | 4694 | out_put_disk: |
eac7cc52 | 4695 | destroy_workqueue(floppy_wq); |
1a4ae43e HRK |
4696 | for (drive = 0; drive < N_DRIVE; drive++) { |
4697 | if (!disks[drive]) | |
4698 | break; | |
4699 | if (disks[drive]->queue) { | |
4700 | del_timer_sync(&motor_off_timer[drive]); | |
4701 | blk_cleanup_queue(disks[drive]->queue); | |
4702 | disks[drive]->queue = NULL; | |
3f9a5aab | 4703 | } |
1a4ae43e | 4704 | put_disk(disks[drive]); |
1da177e4 LT |
4705 | } |
4706 | return err; | |
4707 | } | |
4708 | ||
0cc15d03 AK |
4709 | #ifndef MODULE |
4710 | static __init void floppy_async_init(void *data, async_cookie_t cookie) | |
4711 | { | |
4712 | do_floppy_init(); | |
4713 | } | |
4714 | #endif | |
4715 | ||
4716 | static int __init floppy_init(void) | |
4717 | { | |
4718 | #ifdef MODULE | |
4719 | return do_floppy_init(); | |
4720 | #else | |
4721 | /* Don't hold up the bootup by the floppy initialization */ | |
4722 | async_schedule(floppy_async_init, NULL); | |
4723 | return 0; | |
4724 | #endif | |
4725 | } | |
4726 | ||
5a74db06 PDM |
4727 | static const struct io_region { |
4728 | int offset; | |
4729 | int size; | |
4730 | } io_regions[] = { | |
4731 | { 2, 1 }, | |
4732 | /* address + 3 is sometimes reserved by pnp bios for motherboard */ | |
4733 | { 4, 2 }, | |
4734 | /* address + 6 is reserved, and may be taken by IDE. | |
4735 | * Unfortunately, Adaptec doesn't know this :-(, */ | |
4736 | { 7, 1 }, | |
4737 | }; | |
4738 | ||
4739 | static void floppy_release_allocated_regions(int fdc, const struct io_region *p) | |
4740 | { | |
4741 | while (p != io_regions) { | |
4742 | p--; | |
4743 | release_region(FDCS->address + p->offset, p->size); | |
4744 | } | |
4745 | } | |
4746 | ||
4747 | #define ARRAY_END(X) (&((X)[ARRAY_SIZE(X)])) | |
4748 | ||
4749 | static int floppy_request_regions(int fdc) | |
4750 | { | |
4751 | const struct io_region *p; | |
4752 | ||
4753 | for (p = io_regions; p < ARRAY_END(io_regions); p++) { | |
bb57f0c6 JP |
4754 | if (!request_region(FDCS->address + p->offset, |
4755 | p->size, "floppy")) { | |
4756 | DPRINT("Floppy io-port 0x%04lx in use\n", | |
4757 | FDCS->address + p->offset); | |
5a74db06 PDM |
4758 | floppy_release_allocated_regions(fdc, p); |
4759 | return -EBUSY; | |
4760 | } | |
4761 | } | |
4762 | return 0; | |
4763 | } | |
4764 | ||
4765 | static void floppy_release_regions(int fdc) | |
4766 | { | |
4767 | floppy_release_allocated_regions(fdc, ARRAY_END(io_regions)); | |
4768 | } | |
4769 | ||
1da177e4 LT |
4770 | static int floppy_grab_irq_and_dma(void) |
4771 | { | |
575cfc67 | 4772 | if (atomic_inc_return(&usage_count) > 1) |
1da177e4 | 4773 | return 0; |
6dc659d8 IM |
4774 | |
4775 | /* | |
4776 | * We might have scheduled a free_irq(), wait it to | |
4777 | * drain first: | |
4778 | */ | |
070ad7e7 | 4779 | flush_workqueue(floppy_wq); |
6dc659d8 | 4780 | |
1da177e4 LT |
4781 | if (fd_request_irq()) { |
4782 | DPRINT("Unable to grab IRQ%d for the floppy driver\n", | |
4783 | FLOPPY_IRQ); | |
575cfc67 | 4784 | atomic_dec(&usage_count); |
1da177e4 LT |
4785 | return -1; |
4786 | } | |
4787 | if (fd_request_dma()) { | |
4788 | DPRINT("Unable to grab DMA%d for the floppy driver\n", | |
4789 | FLOPPY_DMA); | |
2e9c47cd JB |
4790 | if (can_use_virtual_dma & 2) |
4791 | use_virtual_dma = can_use_virtual_dma = 1; | |
4792 | if (!(can_use_virtual_dma & 1)) { | |
4793 | fd_free_irq(); | |
575cfc67 | 4794 | atomic_dec(&usage_count); |
2e9c47cd JB |
4795 | return -1; |
4796 | } | |
1da177e4 LT |
4797 | } |
4798 | ||
4799 | for (fdc = 0; fdc < N_FDC; fdc++) { | |
4800 | if (FDCS->address != -1) { | |
5a74db06 PDM |
4801 | if (floppy_request_regions(fdc)) |
4802 | goto cleanup; | |
1da177e4 LT |
4803 | } |
4804 | } | |
4805 | for (fdc = 0; fdc < N_FDC; fdc++) { | |
4806 | if (FDCS->address != -1) { | |
4807 | reset_fdc_info(1); | |
4808 | fd_outb(FDCS->dor, FD_DOR); | |
4809 | } | |
4810 | } | |
4811 | fdc = 0; | |
4812 | set_dor(0, ~0, 8); /* avoid immediate interrupt */ | |
4813 | ||
4814 | for (fdc = 0; fdc < N_FDC; fdc++) | |
4815 | if (FDCS->address != -1) | |
4816 | fd_outb(FDCS->dor, FD_DOR); | |
4817 | /* | |
06f748c4 JJ |
4818 | * The driver will try and free resources and relies on us |
4819 | * to know if they were allocated or not. | |
1da177e4 LT |
4820 | */ |
4821 | fdc = 0; | |
4822 | irqdma_allocated = 1; | |
4823 | return 0; | |
5a74db06 | 4824 | cleanup: |
1da177e4 LT |
4825 | fd_free_irq(); |
4826 | fd_free_dma(); | |
5a74db06 PDM |
4827 | while (--fdc >= 0) |
4828 | floppy_release_regions(fdc); | |
575cfc67 | 4829 | atomic_dec(&usage_count); |
1da177e4 LT |
4830 | return -1; |
4831 | } | |
4832 | ||
4833 | static void floppy_release_irq_and_dma(void) | |
4834 | { | |
4835 | int old_fdc; | |
1da177e4 LT |
4836 | #ifndef __sparc__ |
4837 | int drive; | |
1da177e4 LT |
4838 | #endif |
4839 | long tmpsize; | |
4840 | unsigned long tmpaddr; | |
1da177e4 | 4841 | |
575cfc67 | 4842 | if (!atomic_dec_and_test(&usage_count)) |
1da177e4 | 4843 | return; |
575cfc67 | 4844 | |
1da177e4 LT |
4845 | if (irqdma_allocated) { |
4846 | fd_disable_dma(); | |
4847 | fd_free_dma(); | |
3e541a4a | 4848 | fd_free_irq(); |
1da177e4 LT |
4849 | irqdma_allocated = 0; |
4850 | } | |
4851 | set_dor(0, ~0, 8); | |
4852 | #if N_FDC > 1 | |
4853 | set_dor(1, ~8, 0); | |
4854 | #endif | |
1da177e4 LT |
4855 | |
4856 | if (floppy_track_buffer && max_buffer_sectors) { | |
4857 | tmpsize = max_buffer_sectors * 1024; | |
4858 | tmpaddr = (unsigned long)floppy_track_buffer; | |
4859 | floppy_track_buffer = NULL; | |
4860 | max_buffer_sectors = 0; | |
4861 | buffer_min = buffer_max = -1; | |
4862 | fd_dma_mem_free(tmpaddr, tmpsize); | |
4863 | } | |
1da177e4 LT |
4864 | #ifndef __sparc__ |
4865 | for (drive = 0; drive < N_FDC * 4; drive++) | |
4866 | if (timer_pending(motor_off_timer + drive)) | |
b46df356 | 4867 | pr_info("motor off timer %d still active\n", drive); |
1da177e4 LT |
4868 | #endif |
4869 | ||
070ad7e7 | 4870 | if (delayed_work_pending(&fd_timeout)) |
b46df356 | 4871 | pr_info("floppy timer still active:%s\n", timeout_message); |
070ad7e7 | 4872 | if (delayed_work_pending(&fd_timer)) |
b46df356 | 4873 | pr_info("auxiliary floppy timer still active\n"); |
365970a1 | 4874 | if (work_pending(&floppy_work)) |
b46df356 | 4875 | pr_info("work still pending\n"); |
1da177e4 LT |
4876 | old_fdc = fdc; |
4877 | for (fdc = 0; fdc < N_FDC; fdc++) | |
5a74db06 PDM |
4878 | if (FDCS->address != -1) |
4879 | floppy_release_regions(fdc); | |
1da177e4 LT |
4880 | fdc = old_fdc; |
4881 | } | |
4882 | ||
4883 | #ifdef MODULE | |
4884 | ||
4885 | static char *floppy; | |
4886 | ||
1da177e4 LT |
4887 | static void __init parse_floppy_cfg_string(char *cfg) |
4888 | { | |
4889 | char *ptr; | |
4890 | ||
4891 | while (*cfg) { | |
bb57f0c6 JP |
4892 | ptr = cfg; |
4893 | while (*cfg && *cfg != ' ' && *cfg != '\t') | |
4894 | cfg++; | |
1da177e4 LT |
4895 | if (*cfg) { |
4896 | *cfg = '\0'; | |
4897 | cfg++; | |
4898 | } | |
4899 | if (*ptr) | |
4900 | floppy_setup(ptr); | |
4901 | } | |
4902 | } | |
4903 | ||
7afea3bc | 4904 | static int __init floppy_module_init(void) |
1da177e4 LT |
4905 | { |
4906 | if (floppy) | |
4907 | parse_floppy_cfg_string(floppy); | |
4908 | return floppy_init(); | |
4909 | } | |
7afea3bc | 4910 | module_init(floppy_module_init); |
1da177e4 | 4911 | |
7afea3bc | 4912 | static void __exit floppy_module_exit(void) |
1da177e4 LT |
4913 | { |
4914 | int drive; | |
4915 | ||
1da177e4 LT |
4916 | blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); |
4917 | unregister_blkdev(FLOPPY_MAJOR, "fd"); | |
5e50b9ef | 4918 | platform_driver_unregister(&floppy_driver); |
1da177e4 | 4919 | |
eac7cc52 JK |
4920 | destroy_workqueue(floppy_wq); |
4921 | ||
1da177e4 LT |
4922 | for (drive = 0; drive < N_DRIVE; drive++) { |
4923 | del_timer_sync(&motor_off_timer[drive]); | |
4924 | ||
8d3ab4eb | 4925 | if (floppy_available(drive)) { |
1da177e4 | 4926 | del_gendisk(disks[drive]); |
94fd0db7 | 4927 | platform_device_unregister(&floppy_device[drive]); |
1da177e4 | 4928 | } |
48821184 | 4929 | blk_cleanup_queue(disks[drive]->queue); |
4609dff6 VG |
4930 | |
4931 | /* | |
4932 | * These disks have not called add_disk(). Don't put down | |
4933 | * queue reference in put_disk(). | |
4934 | */ | |
4935 | if (!(allowed_drive_mask & (1 << drive)) || | |
4936 | fdc_state[FDC(drive)].version == FDC_NONE) | |
4937 | disks[drive]->queue = NULL; | |
4938 | ||
d017bf6b | 4939 | put_disk(disks[drive]); |
1da177e4 | 4940 | } |
1da177e4 | 4941 | |
070ad7e7 JK |
4942 | cancel_delayed_work_sync(&fd_timeout); |
4943 | cancel_delayed_work_sync(&fd_timer); | |
1da177e4 | 4944 | |
575cfc67 | 4945 | if (atomic_read(&usage_count)) |
1da177e4 LT |
4946 | floppy_release_irq_and_dma(); |
4947 | ||
4948 | /* eject disk, if any */ | |
4949 | fd_eject(0); | |
1da177e4 | 4950 | } |
48c8cee6 | 4951 | |
7afea3bc | 4952 | module_exit(floppy_module_exit); |
1da177e4 LT |
4953 | |
4954 | module_param(floppy, charp, 0); | |
4955 | module_param(FLOPPY_IRQ, int, 0); | |
4956 | module_param(FLOPPY_DMA, int, 0); | |
4957 | MODULE_AUTHOR("Alain L. Knaff"); | |
4958 | MODULE_SUPPORTED_DEVICE("fd"); | |
4959 | MODULE_LICENSE("GPL"); | |
4960 | ||
83f9ef46 SJR |
4961 | /* This doesn't actually get used other than for module information */ |
4962 | static const struct pnp_device_id floppy_pnpids[] = { | |
48c8cee6 JP |
4963 | {"PNP0700", 0}, |
4964 | {} | |
83f9ef46 | 4965 | }; |
48c8cee6 | 4966 | |
83f9ef46 SJR |
4967 | MODULE_DEVICE_TABLE(pnp, floppy_pnpids); |
4968 | ||
1da177e4 LT |
4969 | #else |
4970 | ||
4971 | __setup("floppy=", floppy_setup); | |
4972 | module_init(floppy_init) | |
4973 | #endif | |
4974 | ||
4975 | MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR); |