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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 | ||
147 | #define FLOPPY_SANITY_CHECK | |
148 | #undef FLOPPY_SILENT_DCL_CLEAR | |
149 | ||
150 | #define REALLY_SLOW_IO | |
151 | ||
152 | #define DEBUGT 2 | |
06f748c4 | 153 | #define DCL_DEBUG /* debug disk change line */ |
1da177e4 LT |
154 | |
155 | /* do print messages for unexpected interrupts */ | |
156 | static int print_unex = 1; | |
157 | #include <linux/module.h> | |
158 | #include <linux/sched.h> | |
159 | #include <linux/fs.h> | |
160 | #include <linux/kernel.h> | |
161 | #include <linux/timer.h> | |
162 | #include <linux/workqueue.h> | |
163 | #define FDPATCHES | |
164 | #include <linux/fdreg.h> | |
1da177e4 LT |
165 | #include <linux/fd.h> |
166 | #include <linux/hdreg.h> | |
1da177e4 LT |
167 | #include <linux/errno.h> |
168 | #include <linux/slab.h> | |
169 | #include <linux/mm.h> | |
170 | #include <linux/bio.h> | |
171 | #include <linux/string.h> | |
50297cbf | 172 | #include <linux/jiffies.h> |
1da177e4 LT |
173 | #include <linux/fcntl.h> |
174 | #include <linux/delay.h> | |
175 | #include <linux/mc146818rtc.h> /* CMOS defines */ | |
176 | #include <linux/ioport.h> | |
177 | #include <linux/interrupt.h> | |
178 | #include <linux/init.h> | |
d052d1be | 179 | #include <linux/platform_device.h> |
1da177e4 | 180 | #include <linux/buffer_head.h> /* for invalidate_buffers() */ |
b1c82b5c | 181 | #include <linux/mutex.h> |
1da177e4 LT |
182 | |
183 | /* | |
184 | * PS/2 floppies have much slower step rates than regular floppies. | |
185 | * It's been recommended that take about 1/4 of the default speed | |
186 | * in some more extreme cases. | |
187 | */ | |
188 | static int slow_floppy; | |
189 | ||
190 | #include <asm/dma.h> | |
191 | #include <asm/irq.h> | |
192 | #include <asm/system.h> | |
193 | #include <asm/io.h> | |
194 | #include <asm/uaccess.h> | |
195 | ||
196 | static int FLOPPY_IRQ = 6; | |
197 | static int FLOPPY_DMA = 2; | |
198 | static int can_use_virtual_dma = 2; | |
199 | /* ======= | |
200 | * can use virtual DMA: | |
201 | * 0 = use of virtual DMA disallowed by config | |
202 | * 1 = use of virtual DMA prescribed by config | |
203 | * 2 = no virtual DMA preference configured. By default try hard DMA, | |
204 | * but fall back on virtual DMA when not enough memory available | |
205 | */ | |
206 | ||
207 | static int use_virtual_dma; | |
208 | /* ======= | |
209 | * use virtual DMA | |
210 | * 0 using hard DMA | |
211 | * 1 using virtual DMA | |
212 | * This variable is set to virtual when a DMA mem problem arises, and | |
213 | * reset back in floppy_grab_irq_and_dma. | |
214 | * It is not safe to reset it in other circumstances, because the floppy | |
215 | * driver may have several buffers in use at once, and we do currently not | |
216 | * record each buffers capabilities | |
217 | */ | |
218 | ||
219 | static DEFINE_SPINLOCK(floppy_lock); | |
1da177e4 LT |
220 | |
221 | static unsigned short virtual_dma_port = 0x3f0; | |
7d12e780 | 222 | irqreturn_t floppy_interrupt(int irq, void *dev_id); |
1da177e4 | 223 | static int set_dor(int fdc, char mask, char data); |
1da177e4 LT |
224 | |
225 | #define K_64 0x10000 /* 64KB */ | |
226 | ||
227 | /* the following is the mask of allowed drives. By default units 2 and | |
228 | * 3 of both floppy controllers are disabled, because switching on the | |
229 | * motor of these drives causes system hangs on some PCI computers. drive | |
230 | * 0 is the low bit (0x1), and drive 7 is the high bit (0x80). Bits are on if | |
231 | * a drive is allowed. | |
232 | * | |
233 | * NOTE: This must come before we include the arch floppy header because | |
234 | * some ports reference this variable from there. -DaveM | |
235 | */ | |
236 | ||
237 | static int allowed_drive_mask = 0x33; | |
238 | ||
239 | #include <asm/floppy.h> | |
240 | ||
241 | static int irqdma_allocated; | |
242 | ||
1da177e4 LT |
243 | #define DEVICE_NAME "floppy" |
244 | ||
245 | #include <linux/blkdev.h> | |
246 | #include <linux/blkpg.h> | |
247 | #include <linux/cdrom.h> /* for the compatibility eject ioctl */ | |
248 | #include <linux/completion.h> | |
249 | ||
250 | static struct request *current_req; | |
251 | static struct request_queue *floppy_queue; | |
165125e1 | 252 | static void do_fd_request(struct request_queue * q); |
1da177e4 LT |
253 | |
254 | #ifndef fd_get_dma_residue | |
255 | #define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA) | |
256 | #endif | |
257 | ||
258 | /* Dma Memory related stuff */ | |
259 | ||
260 | #ifndef fd_dma_mem_free | |
261 | #define fd_dma_mem_free(addr, size) free_pages(addr, get_order(size)) | |
262 | #endif | |
263 | ||
264 | #ifndef fd_dma_mem_alloc | |
265 | #define fd_dma_mem_alloc(size) __get_dma_pages(GFP_KERNEL,get_order(size)) | |
266 | #endif | |
267 | ||
268 | static inline void fallback_on_nodma_alloc(char **addr, size_t l) | |
269 | { | |
270 | #ifdef FLOPPY_CAN_FALLBACK_ON_NODMA | |
271 | if (*addr) | |
272 | return; /* we have the memory */ | |
273 | if (can_use_virtual_dma != 2) | |
274 | return; /* no fallback allowed */ | |
06f748c4 | 275 | printk("DMA memory shortage. Temporarily falling back on virtual DMA\n"); |
1da177e4 LT |
276 | *addr = (char *)nodma_mem_alloc(l); |
277 | #else | |
278 | return; | |
279 | #endif | |
280 | } | |
281 | ||
282 | /* End dma memory related stuff */ | |
283 | ||
284 | static unsigned long fake_change; | |
285 | static int initialising = 1; | |
286 | ||
287 | #define ITYPE(x) (((x)>>2) & 0x1f) | |
288 | #define TOMINOR(x) ((x & 3) | ((x & 4) << 5)) | |
289 | #define UNIT(x) ((x) & 0x03) /* drive on fdc */ | |
290 | #define FDC(x) (((x) & 0x04) >> 2) /* fdc of drive */ | |
06f748c4 | 291 | /* reverse mapping from unit and fdc to drive */ |
1da177e4 | 292 | #define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2)) |
1da177e4 LT |
293 | #define DP (&drive_params[current_drive]) |
294 | #define DRS (&drive_state[current_drive]) | |
295 | #define DRWE (&write_errors[current_drive]) | |
296 | #define FDCS (&fdc_state[fdc]) | |
7b8f850b RB |
297 | #define CLEARF(x) clear_bit(x##_BIT, &DRS->flags) |
298 | #define SETF(x) set_bit(x##_BIT, &DRS->flags) | |
299 | #define TESTF(x) test_bit(x##_BIT, &DRS->flags) | |
1da177e4 LT |
300 | |
301 | #define UDP (&drive_params[drive]) | |
302 | #define UDRS (&drive_state[drive]) | |
303 | #define UDRWE (&write_errors[drive]) | |
304 | #define UFDCS (&fdc_state[FDC(drive)]) | |
7b8f850b RB |
305 | #define UCLEARF(x) clear_bit(x##_BIT, &UDRS->flags) |
306 | #define USETF(x) set_bit(x##_BIT, &UDRS->flags) | |
307 | #define UTESTF(x) test_bit(x##_BIT, &UDRS->flags) | |
1da177e4 LT |
308 | |
309 | #define DPRINT(format, args...) printk(DEVICE_NAME "%d: " format, current_drive , ## args) | |
310 | ||
311 | #define PH_HEAD(floppy,head) (((((floppy)->stretch & 2) >>1) ^ head) << 2) | |
312 | #define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH) | |
313 | ||
314 | #define CLEARSTRUCT(x) memset((x), 0, sizeof(*(x))) | |
315 | ||
316 | /* read/write */ | |
317 | #define COMMAND raw_cmd->cmd[0] | |
318 | #define DR_SELECT raw_cmd->cmd[1] | |
319 | #define TRACK raw_cmd->cmd[2] | |
320 | #define HEAD raw_cmd->cmd[3] | |
321 | #define SECTOR raw_cmd->cmd[4] | |
322 | #define SIZECODE raw_cmd->cmd[5] | |
323 | #define SECT_PER_TRACK raw_cmd->cmd[6] | |
324 | #define GAP raw_cmd->cmd[7] | |
325 | #define SIZECODE2 raw_cmd->cmd[8] | |
326 | #define NR_RW 9 | |
327 | ||
328 | /* format */ | |
329 | #define F_SIZECODE raw_cmd->cmd[2] | |
330 | #define F_SECT_PER_TRACK raw_cmd->cmd[3] | |
331 | #define F_GAP raw_cmd->cmd[4] | |
332 | #define F_FILL raw_cmd->cmd[5] | |
333 | #define NR_F 6 | |
334 | ||
335 | /* | |
336 | * Maximum disk size (in kilobytes). This default is used whenever the | |
337 | * current disk size is unknown. | |
338 | * [Now it is rather a minimum] | |
339 | */ | |
340 | #define MAX_DISK_SIZE 4 /* 3984 */ | |
341 | ||
342 | /* | |
343 | * globals used by 'result()' | |
344 | */ | |
345 | #define MAX_REPLIES 16 | |
346 | static unsigned char reply_buffer[MAX_REPLIES]; | |
347 | static int inr; /* size of reply buffer, when called from interrupt */ | |
348 | #define ST0 (reply_buffer[0]) | |
349 | #define ST1 (reply_buffer[1]) | |
350 | #define ST2 (reply_buffer[2]) | |
351 | #define ST3 (reply_buffer[0]) /* result of GETSTATUS */ | |
352 | #define R_TRACK (reply_buffer[3]) | |
353 | #define R_HEAD (reply_buffer[4]) | |
354 | #define R_SECTOR (reply_buffer[5]) | |
355 | #define R_SIZECODE (reply_buffer[6]) | |
1da177e4 LT |
356 | #define SEL_DLY (2*HZ/100) |
357 | ||
358 | /* | |
359 | * this struct defines the different floppy drive types. | |
360 | */ | |
361 | static struct { | |
362 | struct floppy_drive_params params; | |
363 | const char *name; /* name printed while booting */ | |
364 | } default_drive_params[] = { | |
365 | /* NOTE: the time values in jiffies should be in msec! | |
366 | CMOS drive type | |
367 | | Maximum data rate supported by drive type | |
368 | | | Head load time, msec | |
369 | | | | Head unload time, msec (not used) | |
370 | | | | | Step rate interval, usec | |
371 | | | | | | Time needed for spinup time (jiffies) | |
372 | | | | | | | Timeout for spinning down (jiffies) | |
373 | | | | | | | | Spindown offset (where disk stops) | |
374 | | | | | | | | | Select delay | |
375 | | | | | | | | | | RPS | |
376 | | | | | | | | | | | Max number of tracks | |
377 | | | | | | | | | | | | Interrupt timeout | |
378 | | | | | | | | | | | | | Max nonintlv. sectors | |
379 | | | | | | | | | | | | | | -Max Errors- flags */ | |
380 | {{0, 500, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 80, 3*HZ, 20, {3,1,2,0,2}, 0, | |
381 | 0, { 7, 4, 8, 2, 1, 5, 3,10}, 3*HZ/2, 0 }, "unknown" }, | |
382 | ||
383 | {{1, 300, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 40, 3*HZ, 17, {3,1,2,0,2}, 0, | |
384 | 0, { 1, 0, 0, 0, 0, 0, 0, 0}, 3*HZ/2, 1 }, "360K PC" }, /*5 1/4 360 KB PC*/ | |
385 | ||
386 | {{2, 500, 16, 16, 6000, 4*HZ/10, 3*HZ, 14, SEL_DLY, 6, 83, 3*HZ, 17, {3,1,2,0,2}, 0, | |
387 | 0, { 2, 5, 6,23,10,20,12, 0}, 3*HZ/2, 2 }, "1.2M" }, /*5 1/4 HD AT*/ | |
388 | ||
389 | {{3, 250, 16, 16, 3000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0, | |
390 | 0, { 4,22,21,30, 3, 0, 0, 0}, 3*HZ/2, 4 }, "720k" }, /*3 1/2 DD*/ | |
391 | ||
392 | {{4, 500, 16, 16, 4000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0, | |
393 | 0, { 7, 4,25,22,31,21,29,11}, 3*HZ/2, 7 }, "1.44M" }, /*3 1/2 HD*/ | |
394 | ||
395 | {{5, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0, | |
396 | 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M AMI BIOS" }, /*3 1/2 ED*/ | |
397 | ||
398 | {{6, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0, | |
399 | 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M" } /*3 1/2 ED*/ | |
400 | /* | --autodetected formats--- | | | | |
401 | * read_track | | Name printed when booting | |
402 | * | Native format | |
403 | * Frequency of disk change checks */ | |
404 | }; | |
405 | ||
406 | static struct floppy_drive_params drive_params[N_DRIVE]; | |
407 | static struct floppy_drive_struct drive_state[N_DRIVE]; | |
408 | static struct floppy_write_errors write_errors[N_DRIVE]; | |
409 | static struct timer_list motor_off_timer[N_DRIVE]; | |
410 | static struct gendisk *disks[N_DRIVE]; | |
411 | static struct block_device *opened_bdev[N_DRIVE]; | |
b1c82b5c | 412 | static DEFINE_MUTEX(open_lock); |
1da177e4 LT |
413 | static struct floppy_raw_cmd *raw_cmd, default_raw_cmd; |
414 | ||
415 | /* | |
416 | * This struct defines the different floppy types. | |
417 | * | |
418 | * Bit 0 of 'stretch' tells if the tracks need to be doubled for some | |
419 | * types (e.g. 360kB diskette in 1.2MB drive, etc.). Bit 1 of 'stretch' | |
420 | * tells if the disk is in Commodore 1581 format, which means side 0 sectors | |
421 | * are located on side 1 of the disk but with a side 0 ID, and vice-versa. | |
422 | * This is the same as the Sharp MZ-80 5.25" CP/M disk format, except that the | |
423 | * 1581's logical side 0 is on physical side 1, whereas the Sharp's logical | |
424 | * side 0 is on physical side 0 (but with the misnamed sector IDs). | |
425 | * 'stretch' should probably be renamed to something more general, like | |
9e49184c KW |
426 | * 'options'. |
427 | * | |
428 | * Bits 2 through 9 of 'stretch' tell the number of the first sector. | |
429 | * The LSB (bit 2) is flipped. For most disks, the first sector | |
430 | * is 1 (represented by 0x00<<2). For some CP/M and music sampler | |
431 | * disks (such as Ensoniq EPS 16plus) it is 0 (represented as 0x01<<2). | |
432 | * For Amstrad CPC disks it is 0xC1 (represented as 0xC0<<2). | |
433 | * | |
434 | * Other parameters should be self-explanatory (see also setfdprm(8)). | |
1da177e4 LT |
435 | */ |
436 | /* | |
437 | Size | |
438 | | Sectors per track | |
439 | | | Head | |
440 | | | | Tracks | |
441 | | | | | Stretch | |
442 | | | | | | Gap 1 size | |
443 | | | | | | | Data rate, | 0x40 for perp | |
444 | | | | | | | | Spec1 (stepping rate, head unload | |
445 | | | | | | | | | /fmt gap (gap2) */ | |
446 | static struct floppy_struct floppy_type[32] = { | |
447 | { 0, 0,0, 0,0,0x00,0x00,0x00,0x00,NULL }, /* 0 no testing */ | |
448 | { 720, 9,2,40,0,0x2A,0x02,0xDF,0x50,"d360" }, /* 1 360KB PC */ | |
449 | { 2400,15,2,80,0,0x1B,0x00,0xDF,0x54,"h1200" }, /* 2 1.2MB AT */ | |
450 | { 720, 9,1,80,0,0x2A,0x02,0xDF,0x50,"D360" }, /* 3 360KB SS 3.5" */ | |
451 | { 1440, 9,2,80,0,0x2A,0x02,0xDF,0x50,"D720" }, /* 4 720KB 3.5" */ | |
452 | { 720, 9,2,40,1,0x23,0x01,0xDF,0x50,"h360" }, /* 5 360KB AT */ | |
453 | { 1440, 9,2,80,0,0x23,0x01,0xDF,0x50,"h720" }, /* 6 720KB AT */ | |
454 | { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,"H1440" }, /* 7 1.44MB 3.5" */ | |
455 | { 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"E2880" }, /* 8 2.88MB 3.5" */ | |
456 | { 6240,39,2,80,0,0x1B,0x43,0xAF,0x28,"E3120" }, /* 9 3.12MB 3.5" */ | |
457 | ||
458 | { 2880,18,2,80,0,0x25,0x00,0xDF,0x02,"h1440" }, /* 10 1.44MB 5.25" */ | |
459 | { 3360,21,2,80,0,0x1C,0x00,0xCF,0x0C,"H1680" }, /* 11 1.68MB 3.5" */ | |
460 | { 820,10,2,41,1,0x25,0x01,0xDF,0x2E,"h410" }, /* 12 410KB 5.25" */ | |
461 | { 1640,10,2,82,0,0x25,0x02,0xDF,0x2E,"H820" }, /* 13 820KB 3.5" */ | |
462 | { 2952,18,2,82,0,0x25,0x00,0xDF,0x02,"h1476" }, /* 14 1.48MB 5.25" */ | |
463 | { 3444,21,2,82,0,0x25,0x00,0xDF,0x0C,"H1722" }, /* 15 1.72MB 3.5" */ | |
464 | { 840,10,2,42,1,0x25,0x01,0xDF,0x2E,"h420" }, /* 16 420KB 5.25" */ | |
465 | { 1660,10,2,83,0,0x25,0x02,0xDF,0x2E,"H830" }, /* 17 830KB 3.5" */ | |
466 | { 2988,18,2,83,0,0x25,0x00,0xDF,0x02,"h1494" }, /* 18 1.49MB 5.25" */ | |
467 | { 3486,21,2,83,0,0x25,0x00,0xDF,0x0C,"H1743" }, /* 19 1.74 MB 3.5" */ | |
468 | ||
469 | { 1760,11,2,80,0,0x1C,0x09,0xCF,0x00,"h880" }, /* 20 880KB 5.25" */ | |
470 | { 2080,13,2,80,0,0x1C,0x01,0xCF,0x00,"D1040" }, /* 21 1.04MB 3.5" */ | |
471 | { 2240,14,2,80,0,0x1C,0x19,0xCF,0x00,"D1120" }, /* 22 1.12MB 3.5" */ | |
472 | { 3200,20,2,80,0,0x1C,0x20,0xCF,0x2C,"h1600" }, /* 23 1.6MB 5.25" */ | |
473 | { 3520,22,2,80,0,0x1C,0x08,0xCF,0x2e,"H1760" }, /* 24 1.76MB 3.5" */ | |
474 | { 3840,24,2,80,0,0x1C,0x20,0xCF,0x00,"H1920" }, /* 25 1.92MB 3.5" */ | |
475 | { 6400,40,2,80,0,0x25,0x5B,0xCF,0x00,"E3200" }, /* 26 3.20MB 3.5" */ | |
476 | { 7040,44,2,80,0,0x25,0x5B,0xCF,0x00,"E3520" }, /* 27 3.52MB 3.5" */ | |
477 | { 7680,48,2,80,0,0x25,0x63,0xCF,0x00,"E3840" }, /* 28 3.84MB 3.5" */ | |
1da177e4 | 478 | { 3680,23,2,80,0,0x1C,0x10,0xCF,0x00,"H1840" }, /* 29 1.84MB 3.5" */ |
06f748c4 | 479 | |
1da177e4 LT |
480 | { 1600,10,2,80,0,0x25,0x02,0xDF,0x2E,"D800" }, /* 30 800KB 3.5" */ |
481 | { 3200,20,2,80,0,0x1C,0x00,0xCF,0x2C,"H1600" }, /* 31 1.6MB 3.5" */ | |
482 | }; | |
483 | ||
1da177e4 LT |
484 | #define SECTSIZE (_FD_SECTSIZE(*floppy)) |
485 | ||
486 | /* Auto-detection: Disk type used until the next media change occurs. */ | |
487 | static struct floppy_struct *current_type[N_DRIVE]; | |
488 | ||
489 | /* | |
490 | * User-provided type information. current_type points to | |
491 | * the respective entry of this array. | |
492 | */ | |
493 | static struct floppy_struct user_params[N_DRIVE]; | |
494 | ||
495 | static sector_t floppy_sizes[256]; | |
496 | ||
94fd0db7 HR |
497 | static char floppy_device_name[] = "floppy"; |
498 | ||
1da177e4 LT |
499 | /* |
500 | * The driver is trying to determine the correct media format | |
501 | * while probing is set. rw_interrupt() clears it after a | |
502 | * successful access. | |
503 | */ | |
504 | static int probing; | |
505 | ||
506 | /* Synchronization of FDC access. */ | |
507 | #define FD_COMMAND_NONE -1 | |
508 | #define FD_COMMAND_ERROR 2 | |
509 | #define FD_COMMAND_OKAY 3 | |
510 | ||
511 | static volatile int command_status = FD_COMMAND_NONE; | |
512 | static unsigned long fdc_busy; | |
513 | static DECLARE_WAIT_QUEUE_HEAD(fdc_wait); | |
514 | static DECLARE_WAIT_QUEUE_HEAD(command_done); | |
515 | ||
516 | #define NO_SIGNAL (!interruptible || !signal_pending(current)) | |
517 | #define CALL(x) if ((x) == -EINTR) return -EINTR | |
518 | #define ECALL(x) if ((ret = (x))) return ret; | |
519 | #define _WAIT(x,i) CALL(ret=wait_til_done((x),i)) | |
520 | #define WAIT(x) _WAIT((x),interruptible) | |
521 | #define IWAIT(x) _WAIT((x),1) | |
522 | ||
523 | /* Errors during formatting are counted here. */ | |
524 | static int format_errors; | |
525 | ||
526 | /* Format request descriptor. */ | |
527 | static struct format_descr format_req; | |
528 | ||
529 | /* | |
530 | * Rate is 0 for 500kb/s, 1 for 300kbps, 2 for 250kbps | |
531 | * Spec1 is 0xSH, where S is stepping rate (F=1ms, E=2ms, D=3ms etc), | |
532 | * H is head unload time (1=16ms, 2=32ms, etc) | |
533 | */ | |
534 | ||
535 | /* | |
536 | * Track buffer | |
537 | * Because these are written to by the DMA controller, they must | |
538 | * not contain a 64k byte boundary crossing, or data will be | |
539 | * corrupted/lost. | |
540 | */ | |
541 | static char *floppy_track_buffer; | |
542 | static int max_buffer_sectors; | |
543 | ||
544 | static int *errors; | |
06f748c4 | 545 | typedef void (*done_f)(int); |
1da177e4 | 546 | static struct cont_t { |
06f748c4 | 547 | void (*interrupt)(void); /* this is called after the interrupt of the |
1da177e4 | 548 | * main command */ |
06f748c4 JJ |
549 | void (*redo)(void); /* this is called to retry the operation */ |
550 | void (*error)(void); /* this is called to tally an error */ | |
1da177e4 LT |
551 | done_f done; /* this is called to say if the operation has |
552 | * succeeded/failed */ | |
553 | } *cont; | |
554 | ||
555 | static void floppy_ready(void); | |
556 | static void floppy_start(void); | |
557 | static void process_fd_request(void); | |
558 | static void recalibrate_floppy(void); | |
559 | static void floppy_shutdown(unsigned long); | |
560 | ||
5a74db06 PDM |
561 | static int floppy_request_regions(int); |
562 | static void floppy_release_regions(int); | |
1da177e4 LT |
563 | static int floppy_grab_irq_and_dma(void); |
564 | static void floppy_release_irq_and_dma(void); | |
565 | ||
566 | /* | |
567 | * The "reset" variable should be tested whenever an interrupt is scheduled, | |
568 | * after the commands have been sent. This is to ensure that the driver doesn't | |
569 | * get wedged when the interrupt doesn't come because of a failed command. | |
570 | * reset doesn't need to be tested before sending commands, because | |
571 | * output_byte is automatically disabled when reset is set. | |
572 | */ | |
573 | #define CHECK_RESET { if (FDCS->reset){ reset_fdc(); return; } } | |
574 | static void reset_fdc(void); | |
575 | ||
576 | /* | |
577 | * These are global variables, as that's the easiest way to give | |
578 | * information to interrupts. They are the data used for the current | |
579 | * request. | |
580 | */ | |
581 | #define NO_TRACK -1 | |
582 | #define NEED_1_RECAL -2 | |
583 | #define NEED_2_RECAL -3 | |
584 | ||
585 | static int usage_count; | |
586 | ||
587 | /* buffer related variables */ | |
588 | static int buffer_track = -1; | |
589 | static int buffer_drive = -1; | |
590 | static int buffer_min = -1; | |
591 | static int buffer_max = -1; | |
592 | ||
593 | /* fdc related variables, should end up in a struct */ | |
594 | static struct floppy_fdc_state fdc_state[N_FDC]; | |
595 | static int fdc; /* current fdc */ | |
596 | ||
597 | static struct floppy_struct *_floppy = floppy_type; | |
598 | static unsigned char current_drive; | |
599 | static long current_count_sectors; | |
600 | static unsigned char fsector_t; /* sector in track */ | |
601 | static unsigned char in_sector_offset; /* offset within physical sector, | |
602 | * expressed in units of 512 bytes */ | |
603 | ||
604 | #ifndef fd_eject | |
605 | static inline int fd_eject(int drive) | |
606 | { | |
607 | return -EINVAL; | |
608 | } | |
609 | #endif | |
610 | ||
611 | /* | |
612 | * Debugging | |
613 | * ========= | |
614 | */ | |
615 | #ifdef DEBUGT | |
616 | static long unsigned debugtimer; | |
617 | ||
618 | static inline void set_debugt(void) | |
619 | { | |
620 | debugtimer = jiffies; | |
621 | } | |
622 | ||
623 | static inline void debugt(const char *message) | |
624 | { | |
625 | if (DP->flags & DEBUGT) | |
626 | printk("%s dtime=%lu\n", message, jiffies - debugtimer); | |
627 | } | |
628 | #else | |
629 | static inline void set_debugt(void) { } | |
630 | static inline void debugt(const char *message) { } | |
631 | #endif /* DEBUGT */ | |
632 | ||
633 | typedef void (*timeout_fn) (unsigned long); | |
8d06afab | 634 | static DEFINE_TIMER(fd_timeout, floppy_shutdown, 0, 0); |
1da177e4 LT |
635 | |
636 | static const char *timeout_message; | |
637 | ||
638 | #ifdef FLOPPY_SANITY_CHECK | |
639 | static void is_alive(const char *message) | |
640 | { | |
641 | /* this routine checks whether the floppy driver is "alive" */ | |
642 | if (test_bit(0, &fdc_busy) && command_status < 2 | |
643 | && !timer_pending(&fd_timeout)) { | |
644 | DPRINT("timeout handler died: %s\n", message); | |
645 | } | |
646 | } | |
647 | #endif | |
648 | ||
649 | static void (*do_floppy) (void) = NULL; | |
650 | ||
651 | #ifdef FLOPPY_SANITY_CHECK | |
652 | ||
653 | #define OLOGSIZE 20 | |
654 | ||
655 | static void (*lasthandler) (void); | |
656 | static unsigned long interruptjiffies; | |
657 | static unsigned long resultjiffies; | |
658 | static int resultsize; | |
659 | static unsigned long lastredo; | |
660 | ||
661 | static struct output_log { | |
662 | unsigned char data; | |
663 | unsigned char status; | |
664 | unsigned long jiffies; | |
665 | } output_log[OLOGSIZE]; | |
666 | ||
667 | static int output_log_pos; | |
668 | #endif | |
669 | ||
670 | #define current_reqD -1 | |
671 | #define MAXTIMEOUT -2 | |
672 | ||
673 | static void __reschedule_timeout(int drive, const char *message, int marg) | |
674 | { | |
675 | if (drive == current_reqD) | |
676 | drive = current_drive; | |
677 | del_timer(&fd_timeout); | |
4acb3e2f | 678 | if (drive < 0 || drive >= N_DRIVE) { |
1da177e4 LT |
679 | fd_timeout.expires = jiffies + 20UL * HZ; |
680 | drive = 0; | |
681 | } else | |
682 | fd_timeout.expires = jiffies + UDP->timeout; | |
683 | add_timer(&fd_timeout); | |
684 | if (UDP->flags & FD_DEBUG) { | |
685 | DPRINT("reschedule timeout "); | |
686 | printk(message, marg); | |
687 | printk("\n"); | |
688 | } | |
689 | timeout_message = message; | |
690 | } | |
691 | ||
692 | static void reschedule_timeout(int drive, const char *message, int marg) | |
693 | { | |
694 | unsigned long flags; | |
695 | ||
696 | spin_lock_irqsave(&floppy_lock, flags); | |
697 | __reschedule_timeout(drive, message, marg); | |
698 | spin_unlock_irqrestore(&floppy_lock, flags); | |
699 | } | |
700 | ||
701 | #define INFBOUND(a,b) (a)=max_t(int, a, b) | |
1da177e4 LT |
702 | #define SUPBOUND(a,b) (a)=min_t(int, a, b) |
703 | ||
704 | /* | |
705 | * Bottom half floppy driver. | |
706 | * ========================== | |
707 | * | |
708 | * This part of the file contains the code talking directly to the hardware, | |
709 | * and also the main service loop (seek-configure-spinup-command) | |
710 | */ | |
711 | ||
712 | /* | |
713 | * disk change. | |
714 | * This routine is responsible for maintaining the FD_DISK_CHANGE flag, | |
715 | * and the last_checked date. | |
716 | * | |
717 | * last_checked is the date of the last check which showed 'no disk change' | |
718 | * FD_DISK_CHANGE is set under two conditions: | |
719 | * 1. The floppy has been changed after some i/o to that floppy already | |
720 | * took place. | |
721 | * 2. No floppy disk is in the drive. This is done in order to ensure that | |
722 | * requests are quickly flushed in case there is no disk in the drive. It | |
723 | * follows that FD_DISK_CHANGE can only be cleared if there is a disk in | |
724 | * the drive. | |
725 | * | |
726 | * For 1., maxblock is observed. Maxblock is 0 if no i/o has taken place yet. | |
727 | * For 2., FD_DISK_NEWCHANGE is watched. FD_DISK_NEWCHANGE is cleared on | |
728 | * each seek. If a disk is present, the disk change line should also be | |
729 | * cleared on each seek. Thus, if FD_DISK_NEWCHANGE is clear, but the disk | |
730 | * change line is set, this means either that no disk is in the drive, or | |
731 | * that it has been removed since the last seek. | |
732 | * | |
733 | * This means that we really have a third possibility too: | |
734 | * The floppy has been changed after the last seek. | |
735 | */ | |
736 | ||
737 | static int disk_change(int drive) | |
738 | { | |
739 | int fdc = FDC(drive); | |
06f748c4 | 740 | |
1da177e4 | 741 | #ifdef FLOPPY_SANITY_CHECK |
50297cbf | 742 | if (time_before(jiffies, UDRS->select_date + UDP->select_delay)) |
1da177e4 LT |
743 | DPRINT("WARNING disk change called early\n"); |
744 | if (!(FDCS->dor & (0x10 << UNIT(drive))) || | |
745 | (FDCS->dor & 3) != UNIT(drive) || fdc != FDC(drive)) { | |
746 | DPRINT("probing disk change on unselected drive\n"); | |
747 | DPRINT("drive=%d fdc=%d dor=%x\n", drive, FDC(drive), | |
748 | (unsigned int)FDCS->dor); | |
749 | } | |
750 | #endif | |
751 | ||
752 | #ifdef DCL_DEBUG | |
753 | if (UDP->flags & FD_DEBUG) { | |
754 | DPRINT("checking disk change line for drive %d\n", drive); | |
755 | DPRINT("jiffies=%lu\n", jiffies); | |
756 | DPRINT("disk change line=%x\n", fd_inb(FD_DIR) & 0x80); | |
757 | DPRINT("flags=%lx\n", UDRS->flags); | |
758 | } | |
759 | #endif | |
760 | if (UDP->flags & FD_BROKEN_DCL) | |
761 | return UTESTF(FD_DISK_CHANGED); | |
762 | if ((fd_inb(FD_DIR) ^ UDP->flags) & 0x80) { | |
763 | USETF(FD_VERIFY); /* verify write protection */ | |
764 | if (UDRS->maxblock) { | |
765 | /* mark it changed */ | |
766 | USETF(FD_DISK_CHANGED); | |
767 | } | |
768 | ||
769 | /* invalidate its geometry */ | |
770 | if (UDRS->keep_data >= 0) { | |
771 | if ((UDP->flags & FTD_MSG) && | |
772 | current_type[drive] != NULL) | |
773 | DPRINT("Disk type is undefined after " | |
774 | "disk change\n"); | |
775 | current_type[drive] = NULL; | |
776 | floppy_sizes[TOMINOR(drive)] = MAX_DISK_SIZE << 1; | |
777 | } | |
778 | ||
1da177e4 LT |
779 | return 1; |
780 | } else { | |
781 | UDRS->last_checked = jiffies; | |
782 | UCLEARF(FD_DISK_NEWCHANGE); | |
783 | } | |
784 | return 0; | |
785 | } | |
786 | ||
787 | static inline int is_selected(int dor, int unit) | |
788 | { | |
789 | return ((dor & (0x10 << unit)) && (dor & 3) == unit); | |
790 | } | |
791 | ||
792 | static int set_dor(int fdc, char mask, char data) | |
793 | { | |
fdc1ca8a JJ |
794 | unsigned char unit; |
795 | unsigned char drive; | |
796 | unsigned char newdor; | |
797 | unsigned char olddor; | |
1da177e4 LT |
798 | |
799 | if (FDCS->address == -1) | |
800 | return -1; | |
801 | ||
802 | olddor = FDCS->dor; | |
803 | newdor = (olddor & mask) | data; | |
804 | if (newdor != olddor) { | |
805 | unit = olddor & 0x3; | |
806 | if (is_selected(olddor, unit) && !is_selected(newdor, unit)) { | |
807 | drive = REVDRIVE(fdc, unit); | |
808 | #ifdef DCL_DEBUG | |
809 | if (UDP->flags & FD_DEBUG) { | |
810 | DPRINT("calling disk change from set_dor\n"); | |
811 | } | |
812 | #endif | |
813 | disk_change(drive); | |
814 | } | |
815 | FDCS->dor = newdor; | |
816 | fd_outb(newdor, FD_DOR); | |
817 | ||
818 | unit = newdor & 0x3; | |
819 | if (!is_selected(olddor, unit) && is_selected(newdor, unit)) { | |
820 | drive = REVDRIVE(fdc, unit); | |
821 | UDRS->select_date = jiffies; | |
822 | } | |
823 | } | |
1da177e4 LT |
824 | return olddor; |
825 | } | |
826 | ||
827 | static void twaddle(void) | |
828 | { | |
829 | if (DP->select_delay) | |
830 | return; | |
831 | fd_outb(FDCS->dor & ~(0x10 << UNIT(current_drive)), FD_DOR); | |
832 | fd_outb(FDCS->dor, FD_DOR); | |
833 | DRS->select_date = jiffies; | |
834 | } | |
835 | ||
836 | /* reset all driver information about the current fdc. This is needed after | |
837 | * a reset, and after a raw command. */ | |
838 | static void reset_fdc_info(int mode) | |
839 | { | |
840 | int drive; | |
841 | ||
842 | FDCS->spec1 = FDCS->spec2 = -1; | |
843 | FDCS->need_configure = 1; | |
844 | FDCS->perp_mode = 1; | |
845 | FDCS->rawcmd = 0; | |
846 | for (drive = 0; drive < N_DRIVE; drive++) | |
847 | if (FDC(drive) == fdc && (mode || UDRS->track != NEED_1_RECAL)) | |
848 | UDRS->track = NEED_2_RECAL; | |
849 | } | |
850 | ||
851 | /* selects the fdc and drive, and enables the fdc's input/dma. */ | |
852 | static void set_fdc(int drive) | |
853 | { | |
854 | if (drive >= 0 && drive < N_DRIVE) { | |
855 | fdc = FDC(drive); | |
856 | current_drive = drive; | |
857 | } | |
858 | if (fdc != 1 && fdc != 0) { | |
859 | printk("bad fdc value\n"); | |
860 | return; | |
861 | } | |
862 | set_dor(fdc, ~0, 8); | |
863 | #if N_FDC > 1 | |
864 | set_dor(1 - fdc, ~8, 0); | |
865 | #endif | |
866 | if (FDCS->rawcmd == 2) | |
867 | reset_fdc_info(1); | |
868 | if (fd_inb(FD_STATUS) != STATUS_READY) | |
869 | FDCS->reset = 1; | |
870 | } | |
871 | ||
872 | /* locks the driver */ | |
873 | static int _lock_fdc(int drive, int interruptible, int line) | |
874 | { | |
875 | if (!usage_count) { | |
876 | printk(KERN_ERR | |
877 | "Trying to lock fdc while usage count=0 at line %d\n", | |
878 | line); | |
879 | return -1; | |
880 | } | |
1da177e4 LT |
881 | |
882 | if (test_and_set_bit(0, &fdc_busy)) { | |
883 | DECLARE_WAITQUEUE(wait, current); | |
884 | add_wait_queue(&fdc_wait, &wait); | |
885 | ||
886 | for (;;) { | |
887 | set_current_state(TASK_INTERRUPTIBLE); | |
888 | ||
889 | if (!test_and_set_bit(0, &fdc_busy)) | |
890 | break; | |
891 | ||
892 | schedule(); | |
893 | ||
894 | if (!NO_SIGNAL) { | |
895 | remove_wait_queue(&fdc_wait, &wait); | |
896 | return -EINTR; | |
897 | } | |
898 | } | |
899 | ||
900 | set_current_state(TASK_RUNNING); | |
901 | remove_wait_queue(&fdc_wait, &wait); | |
3e541a4a | 902 | flush_scheduled_work(); |
1da177e4 LT |
903 | } |
904 | command_status = FD_COMMAND_NONE; | |
905 | ||
906 | __reschedule_timeout(drive, "lock fdc", 0); | |
907 | set_fdc(drive); | |
908 | return 0; | |
909 | } | |
910 | ||
911 | #define lock_fdc(drive,interruptible) _lock_fdc(drive,interruptible, __LINE__) | |
912 | ||
913 | #define LOCK_FDC(drive,interruptible) \ | |
914 | if (lock_fdc(drive,interruptible)) return -EINTR; | |
915 | ||
916 | /* unlocks the driver */ | |
917 | static inline void unlock_fdc(void) | |
918 | { | |
919 | unsigned long flags; | |
920 | ||
921 | raw_cmd = NULL; | |
922 | if (!test_bit(0, &fdc_busy)) | |
923 | DPRINT("FDC access conflict!\n"); | |
924 | ||
925 | if (do_floppy) | |
926 | DPRINT("device interrupt still active at FDC release: %p!\n", | |
927 | do_floppy); | |
928 | command_status = FD_COMMAND_NONE; | |
929 | spin_lock_irqsave(&floppy_lock, flags); | |
930 | del_timer(&fd_timeout); | |
931 | cont = NULL; | |
932 | clear_bit(0, &fdc_busy); | |
933 | if (elv_next_request(floppy_queue)) | |
934 | do_fd_request(floppy_queue); | |
935 | spin_unlock_irqrestore(&floppy_lock, flags); | |
1da177e4 LT |
936 | wake_up(&fdc_wait); |
937 | } | |
938 | ||
939 | /* switches the motor off after a given timeout */ | |
940 | static void motor_off_callback(unsigned long nr) | |
941 | { | |
942 | unsigned char mask = ~(0x10 << UNIT(nr)); | |
943 | ||
944 | set_dor(FDC(nr), mask, 0); | |
945 | } | |
946 | ||
947 | /* schedules motor off */ | |
948 | static void floppy_off(unsigned int drive) | |
949 | { | |
950 | unsigned long volatile delta; | |
fdc1ca8a | 951 | int fdc = FDC(drive); |
1da177e4 LT |
952 | |
953 | if (!(FDCS->dor & (0x10 << UNIT(drive)))) | |
954 | return; | |
955 | ||
956 | del_timer(motor_off_timer + drive); | |
957 | ||
958 | /* make spindle stop in a position which minimizes spinup time | |
959 | * next time */ | |
960 | if (UDP->rps) { | |
961 | delta = jiffies - UDRS->first_read_date + HZ - | |
962 | UDP->spindown_offset; | |
963 | delta = ((delta * UDP->rps) % HZ) / UDP->rps; | |
964 | motor_off_timer[drive].expires = | |
965 | jiffies + UDP->spindown - delta; | |
966 | } | |
967 | add_timer(motor_off_timer + drive); | |
968 | } | |
969 | ||
970 | /* | |
971 | * cycle through all N_DRIVE floppy drives, for disk change testing. | |
972 | * stopping at current drive. This is done before any long operation, to | |
973 | * be sure to have up to date disk change information. | |
974 | */ | |
975 | static void scandrives(void) | |
976 | { | |
06f748c4 JJ |
977 | int i; |
978 | int drive; | |
979 | int saved_drive; | |
1da177e4 LT |
980 | |
981 | if (DP->select_delay) | |
982 | return; | |
983 | ||
984 | saved_drive = current_drive; | |
985 | for (i = 0; i < N_DRIVE; i++) { | |
986 | drive = (saved_drive + i + 1) % N_DRIVE; | |
987 | if (UDRS->fd_ref == 0 || UDP->select_delay != 0) | |
988 | continue; /* skip closed drives */ | |
989 | set_fdc(drive); | |
990 | if (!(set_dor(fdc, ~3, UNIT(drive) | (0x10 << UNIT(drive))) & | |
991 | (0x10 << UNIT(drive)))) | |
992 | /* switch the motor off again, if it was off to | |
993 | * begin with */ | |
994 | set_dor(fdc, ~(0x10 << UNIT(drive)), 0); | |
995 | } | |
996 | set_fdc(saved_drive); | |
997 | } | |
998 | ||
999 | static void empty(void) | |
1000 | { | |
1001 | } | |
1002 | ||
65f27f38 | 1003 | static DECLARE_WORK(floppy_work, NULL); |
1da177e4 LT |
1004 | |
1005 | static void schedule_bh(void (*handler) (void)) | |
1006 | { | |
65f27f38 | 1007 | PREPARE_WORK(&floppy_work, (work_func_t)handler); |
1da177e4 LT |
1008 | schedule_work(&floppy_work); |
1009 | } | |
1010 | ||
8d06afab | 1011 | static DEFINE_TIMER(fd_timer, NULL, 0, 0); |
1da177e4 LT |
1012 | |
1013 | static void cancel_activity(void) | |
1014 | { | |
1015 | unsigned long flags; | |
1016 | ||
1017 | spin_lock_irqsave(&floppy_lock, flags); | |
1018 | do_floppy = NULL; | |
65f27f38 | 1019 | PREPARE_WORK(&floppy_work, (work_func_t)empty); |
1da177e4 LT |
1020 | del_timer(&fd_timer); |
1021 | spin_unlock_irqrestore(&floppy_lock, flags); | |
1022 | } | |
1023 | ||
1024 | /* this function makes sure that the disk stays in the drive during the | |
1025 | * transfer */ | |
1026 | static void fd_watchdog(void) | |
1027 | { | |
1028 | #ifdef DCL_DEBUG | |
1029 | if (DP->flags & FD_DEBUG) { | |
1030 | DPRINT("calling disk change from watchdog\n"); | |
1031 | } | |
1032 | #endif | |
1033 | ||
1034 | if (disk_change(current_drive)) { | |
1035 | DPRINT("disk removed during i/o\n"); | |
1036 | cancel_activity(); | |
1037 | cont->done(0); | |
1038 | reset_fdc(); | |
1039 | } else { | |
1040 | del_timer(&fd_timer); | |
1041 | fd_timer.function = (timeout_fn) fd_watchdog; | |
1042 | fd_timer.expires = jiffies + HZ / 10; | |
1043 | add_timer(&fd_timer); | |
1044 | } | |
1045 | } | |
1046 | ||
1047 | static void main_command_interrupt(void) | |
1048 | { | |
1049 | del_timer(&fd_timer); | |
1050 | cont->interrupt(); | |
1051 | } | |
1052 | ||
1053 | /* waits for a delay (spinup or select) to pass */ | |
1054 | static int fd_wait_for_completion(unsigned long delay, timeout_fn function) | |
1055 | { | |
1056 | if (FDCS->reset) { | |
1057 | reset_fdc(); /* do the reset during sleep to win time | |
1058 | * if we don't need to sleep, it's a good | |
1059 | * occasion anyways */ | |
1060 | return 1; | |
1061 | } | |
1062 | ||
50297cbf | 1063 | if (time_before(jiffies, delay)) { |
1da177e4 LT |
1064 | del_timer(&fd_timer); |
1065 | fd_timer.function = function; | |
1066 | fd_timer.expires = delay; | |
1067 | add_timer(&fd_timer); | |
1068 | return 1; | |
1069 | } | |
1070 | return 0; | |
1071 | } | |
1072 | ||
1073 | static DEFINE_SPINLOCK(floppy_hlt_lock); | |
1074 | static int hlt_disabled; | |
1075 | static void floppy_disable_hlt(void) | |
1076 | { | |
1077 | unsigned long flags; | |
1078 | ||
1079 | spin_lock_irqsave(&floppy_hlt_lock, flags); | |
1080 | if (!hlt_disabled) { | |
1081 | hlt_disabled = 1; | |
1082 | #ifdef HAVE_DISABLE_HLT | |
1083 | disable_hlt(); | |
1084 | #endif | |
1085 | } | |
1086 | spin_unlock_irqrestore(&floppy_hlt_lock, flags); | |
1087 | } | |
1088 | ||
1089 | static void floppy_enable_hlt(void) | |
1090 | { | |
1091 | unsigned long flags; | |
1092 | ||
1093 | spin_lock_irqsave(&floppy_hlt_lock, flags); | |
1094 | if (hlt_disabled) { | |
1095 | hlt_disabled = 0; | |
1096 | #ifdef HAVE_DISABLE_HLT | |
1097 | enable_hlt(); | |
1098 | #endif | |
1099 | } | |
1100 | spin_unlock_irqrestore(&floppy_hlt_lock, flags); | |
1101 | } | |
1102 | ||
1103 | static void setup_DMA(void) | |
1104 | { | |
1105 | unsigned long f; | |
1106 | ||
1107 | #ifdef FLOPPY_SANITY_CHECK | |
1108 | if (raw_cmd->length == 0) { | |
1109 | int i; | |
1110 | ||
1111 | printk("zero dma transfer size:"); | |
1112 | for (i = 0; i < raw_cmd->cmd_count; i++) | |
1113 | printk("%x,", raw_cmd->cmd[i]); | |
1114 | printk("\n"); | |
1115 | cont->done(0); | |
1116 | FDCS->reset = 1; | |
1117 | return; | |
1118 | } | |
1119 | if (((unsigned long)raw_cmd->kernel_data) % 512) { | |
1120 | printk("non aligned address: %p\n", raw_cmd->kernel_data); | |
1121 | cont->done(0); | |
1122 | FDCS->reset = 1; | |
1123 | return; | |
1124 | } | |
1125 | #endif | |
1126 | f = claim_dma_lock(); | |
1127 | fd_disable_dma(); | |
1128 | #ifdef fd_dma_setup | |
1129 | if (fd_dma_setup(raw_cmd->kernel_data, raw_cmd->length, | |
1130 | (raw_cmd->flags & FD_RAW_READ) ? | |
1131 | DMA_MODE_READ : DMA_MODE_WRITE, FDCS->address) < 0) { | |
1132 | release_dma_lock(f); | |
1133 | cont->done(0); | |
1134 | FDCS->reset = 1; | |
1135 | return; | |
1136 | } | |
1137 | release_dma_lock(f); | |
1138 | #else | |
1139 | fd_clear_dma_ff(); | |
1140 | fd_cacheflush(raw_cmd->kernel_data, raw_cmd->length); | |
1141 | fd_set_dma_mode((raw_cmd->flags & FD_RAW_READ) ? | |
1142 | DMA_MODE_READ : DMA_MODE_WRITE); | |
1143 | fd_set_dma_addr(raw_cmd->kernel_data); | |
1144 | fd_set_dma_count(raw_cmd->length); | |
1145 | virtual_dma_port = FDCS->address; | |
1146 | fd_enable_dma(); | |
1147 | release_dma_lock(f); | |
1148 | #endif | |
1149 | floppy_disable_hlt(); | |
1150 | } | |
1151 | ||
1152 | static void show_floppy(void); | |
1153 | ||
1154 | /* waits until the fdc becomes ready */ | |
1155 | static int wait_til_ready(void) | |
1156 | { | |
06f748c4 JJ |
1157 | int status; |
1158 | int counter; | |
1159 | ||
1da177e4 LT |
1160 | if (FDCS->reset) |
1161 | return -1; | |
1162 | for (counter = 0; counter < 10000; counter++) { | |
1163 | status = fd_inb(FD_STATUS); | |
1164 | if (status & STATUS_READY) | |
1165 | return status; | |
1166 | } | |
1167 | if (!initialising) { | |
1168 | DPRINT("Getstatus times out (%x) on fdc %d\n", status, fdc); | |
1169 | show_floppy(); | |
1170 | } | |
1171 | FDCS->reset = 1; | |
1172 | return -1; | |
1173 | } | |
1174 | ||
1175 | /* sends a command byte to the fdc */ | |
1176 | static int output_byte(char byte) | |
1177 | { | |
1178 | int status; | |
1179 | ||
1180 | if ((status = wait_til_ready()) < 0) | |
1181 | return -1; | |
1182 | if ((status & (STATUS_READY | STATUS_DIR | STATUS_DMA)) == STATUS_READY) { | |
1183 | fd_outb(byte, FD_DATA); | |
1184 | #ifdef FLOPPY_SANITY_CHECK | |
1185 | output_log[output_log_pos].data = byte; | |
1186 | output_log[output_log_pos].status = status; | |
1187 | output_log[output_log_pos].jiffies = jiffies; | |
1188 | output_log_pos = (output_log_pos + 1) % OLOGSIZE; | |
1189 | #endif | |
1190 | return 0; | |
1191 | } | |
1192 | FDCS->reset = 1; | |
1193 | if (!initialising) { | |
1194 | DPRINT("Unable to send byte %x to FDC. Fdc=%x Status=%x\n", | |
1195 | byte, fdc, status); | |
1196 | show_floppy(); | |
1197 | } | |
1198 | return -1; | |
1199 | } | |
1200 | ||
1201 | #define LAST_OUT(x) if (output_byte(x)<0){ reset_fdc();return;} | |
1202 | ||
1203 | /* gets the response from the fdc */ | |
1204 | static int result(void) | |
1205 | { | |
06f748c4 JJ |
1206 | int i; |
1207 | int status = 0; | |
1da177e4 LT |
1208 | |
1209 | for (i = 0; i < MAX_REPLIES; i++) { | |
1210 | if ((status = wait_til_ready()) < 0) | |
1211 | break; | |
1212 | status &= STATUS_DIR | STATUS_READY | STATUS_BUSY | STATUS_DMA; | |
1213 | if ((status & ~STATUS_BUSY) == STATUS_READY) { | |
1214 | #ifdef FLOPPY_SANITY_CHECK | |
1215 | resultjiffies = jiffies; | |
1216 | resultsize = i; | |
1217 | #endif | |
1218 | return i; | |
1219 | } | |
1220 | if (status == (STATUS_DIR | STATUS_READY | STATUS_BUSY)) | |
1221 | reply_buffer[i] = fd_inb(FD_DATA); | |
1222 | else | |
1223 | break; | |
1224 | } | |
1225 | if (!initialising) { | |
1226 | DPRINT | |
1227 | ("get result error. Fdc=%d Last status=%x Read bytes=%d\n", | |
1228 | fdc, status, i); | |
1229 | show_floppy(); | |
1230 | } | |
1231 | FDCS->reset = 1; | |
1232 | return -1; | |
1233 | } | |
1234 | ||
1235 | #define MORE_OUTPUT -2 | |
1236 | /* does the fdc need more output? */ | |
1237 | static int need_more_output(void) | |
1238 | { | |
1239 | int status; | |
06f748c4 | 1240 | |
1da177e4 LT |
1241 | if ((status = wait_til_ready()) < 0) |
1242 | return -1; | |
1243 | if ((status & (STATUS_READY | STATUS_DIR | STATUS_DMA)) == STATUS_READY) | |
1244 | return MORE_OUTPUT; | |
1245 | return result(); | |
1246 | } | |
1247 | ||
1248 | /* Set perpendicular mode as required, based on data rate, if supported. | |
1249 | * 82077 Now tested. 1Mbps data rate only possible with 82077-1. | |
1250 | */ | |
1251 | static inline void perpendicular_mode(void) | |
1252 | { | |
1253 | unsigned char perp_mode; | |
1254 | ||
1255 | if (raw_cmd->rate & 0x40) { | |
1256 | switch (raw_cmd->rate & 3) { | |
1257 | case 0: | |
1258 | perp_mode = 2; | |
1259 | break; | |
1260 | case 3: | |
1261 | perp_mode = 3; | |
1262 | break; | |
1263 | default: | |
1264 | DPRINT("Invalid data rate for perpendicular mode!\n"); | |
1265 | cont->done(0); | |
1266 | FDCS->reset = 1; /* convenient way to return to | |
1267 | * redo without to much hassle (deep | |
1268 | * stack et al. */ | |
1269 | return; | |
1270 | } | |
1271 | } else | |
1272 | perp_mode = 0; | |
1273 | ||
1274 | if (FDCS->perp_mode == perp_mode) | |
1275 | return; | |
1276 | if (FDCS->version >= FDC_82077_ORIG) { | |
1277 | output_byte(FD_PERPENDICULAR); | |
1278 | output_byte(perp_mode); | |
1279 | FDCS->perp_mode = perp_mode; | |
1280 | } else if (perp_mode) { | |
1281 | DPRINT("perpendicular mode not supported by this FDC.\n"); | |
1282 | } | |
1283 | } /* perpendicular_mode */ | |
1284 | ||
1285 | static int fifo_depth = 0xa; | |
1286 | static int no_fifo; | |
1287 | ||
1288 | static int fdc_configure(void) | |
1289 | { | |
1290 | /* Turn on FIFO */ | |
1291 | output_byte(FD_CONFIGURE); | |
1292 | if (need_more_output() != MORE_OUTPUT) | |
1293 | return 0; | |
1294 | output_byte(0); | |
1295 | output_byte(0x10 | (no_fifo & 0x20) | (fifo_depth & 0xf)); | |
1296 | output_byte(0); /* pre-compensation from track | |
1297 | 0 upwards */ | |
1298 | return 1; | |
1299 | } | |
1300 | ||
1301 | #define NOMINAL_DTR 500 | |
1302 | ||
1303 | /* Issue a "SPECIFY" command to set the step rate time, head unload time, | |
1304 | * head load time, and DMA disable flag to values needed by floppy. | |
1305 | * | |
1306 | * The value "dtr" is the data transfer rate in Kbps. It is needed | |
1307 | * to account for the data rate-based scaling done by the 82072 and 82077 | |
1308 | * FDC types. This parameter is ignored for other types of FDCs (i.e. | |
1309 | * 8272a). | |
1310 | * | |
1311 | * Note that changing the data transfer rate has a (probably deleterious) | |
1312 | * effect on the parameters subject to scaling for 82072/82077 FDCs, so | |
1313 | * fdc_specify is called again after each data transfer rate | |
1314 | * change. | |
1315 | * | |
1316 | * srt: 1000 to 16000 in microseconds | |
1317 | * hut: 16 to 240 milliseconds | |
1318 | * hlt: 2 to 254 milliseconds | |
1319 | * | |
1320 | * These values are rounded up to the next highest available delay time. | |
1321 | */ | |
1322 | static void fdc_specify(void) | |
1323 | { | |
06f748c4 JJ |
1324 | unsigned char spec1; |
1325 | unsigned char spec2; | |
1326 | unsigned long srt; | |
1327 | unsigned long hlt; | |
1328 | unsigned long hut; | |
1da177e4 LT |
1329 | unsigned long dtr = NOMINAL_DTR; |
1330 | unsigned long scale_dtr = NOMINAL_DTR; | |
1331 | int hlt_max_code = 0x7f; | |
1332 | int hut_max_code = 0xf; | |
1333 | ||
1334 | if (FDCS->need_configure && FDCS->version >= FDC_82072A) { | |
1335 | fdc_configure(); | |
1336 | FDCS->need_configure = 0; | |
1da177e4 LT |
1337 | } |
1338 | ||
1339 | switch (raw_cmd->rate & 0x03) { | |
1340 | case 3: | |
1341 | dtr = 1000; | |
1342 | break; | |
1343 | case 1: | |
1344 | dtr = 300; | |
1345 | if (FDCS->version >= FDC_82078) { | |
1346 | /* chose the default rate table, not the one | |
1347 | * where 1 = 2 Mbps */ | |
1348 | output_byte(FD_DRIVESPEC); | |
1349 | if (need_more_output() == MORE_OUTPUT) { | |
1350 | output_byte(UNIT(current_drive)); | |
1351 | output_byte(0xc0); | |
1352 | } | |
1353 | } | |
1354 | break; | |
1355 | case 2: | |
1356 | dtr = 250; | |
1357 | break; | |
1358 | } | |
1359 | ||
1360 | if (FDCS->version >= FDC_82072) { | |
1361 | scale_dtr = dtr; | |
1362 | hlt_max_code = 0x00; /* 0==256msec*dtr0/dtr (not linear!) */ | |
1363 | hut_max_code = 0x0; /* 0==256msec*dtr0/dtr (not linear!) */ | |
1364 | } | |
1365 | ||
1366 | /* Convert step rate from microseconds to milliseconds and 4 bits */ | |
061837bc | 1367 | srt = 16 - DIV_ROUND_UP(DP->srt * scale_dtr / 1000, NOMINAL_DTR); |
1da177e4 LT |
1368 | if (slow_floppy) { |
1369 | srt = srt / 4; | |
1370 | } | |
1371 | SUPBOUND(srt, 0xf); | |
1372 | INFBOUND(srt, 0); | |
1373 | ||
061837bc | 1374 | hlt = DIV_ROUND_UP(DP->hlt * scale_dtr / 2, NOMINAL_DTR); |
1da177e4 LT |
1375 | if (hlt < 0x01) |
1376 | hlt = 0x01; | |
1377 | else if (hlt > 0x7f) | |
1378 | hlt = hlt_max_code; | |
1379 | ||
061837bc | 1380 | hut = DIV_ROUND_UP(DP->hut * scale_dtr / 16, NOMINAL_DTR); |
1da177e4 LT |
1381 | if (hut < 0x1) |
1382 | hut = 0x1; | |
1383 | else if (hut > 0xf) | |
1384 | hut = hut_max_code; | |
1385 | ||
1386 | spec1 = (srt << 4) | hut; | |
1387 | spec2 = (hlt << 1) | (use_virtual_dma & 1); | |
1388 | ||
1389 | /* If these parameters did not change, just return with success */ | |
1390 | if (FDCS->spec1 != spec1 || FDCS->spec2 != spec2) { | |
1391 | /* Go ahead and set spec1 and spec2 */ | |
1392 | output_byte(FD_SPECIFY); | |
1393 | output_byte(FDCS->spec1 = spec1); | |
1394 | output_byte(FDCS->spec2 = spec2); | |
1395 | } | |
1396 | } /* fdc_specify */ | |
1397 | ||
1398 | /* Set the FDC's data transfer rate on behalf of the specified drive. | |
1399 | * NOTE: with 82072/82077 FDCs, changing the data rate requires a reissue | |
1400 | * of the specify command (i.e. using the fdc_specify function). | |
1401 | */ | |
1402 | static int fdc_dtr(void) | |
1403 | { | |
1404 | /* If data rate not already set to desired value, set it. */ | |
1405 | if ((raw_cmd->rate & 3) == FDCS->dtr) | |
1406 | return 0; | |
1407 | ||
1408 | /* Set dtr */ | |
1409 | fd_outb(raw_cmd->rate & 3, FD_DCR); | |
1410 | ||
1411 | /* TODO: some FDC/drive combinations (C&T 82C711 with TEAC 1.2MB) | |
1412 | * need a stabilization period of several milliseconds to be | |
1413 | * enforced after data rate changes before R/W operations. | |
1414 | * Pause 5 msec to avoid trouble. (Needs to be 2 jiffies) | |
1415 | */ | |
1416 | FDCS->dtr = raw_cmd->rate & 3; | |
1417 | return (fd_wait_for_completion(jiffies + 2UL * HZ / 100, | |
1418 | (timeout_fn) floppy_ready)); | |
1419 | } /* fdc_dtr */ | |
1420 | ||
1421 | static void tell_sector(void) | |
1422 | { | |
1423 | printk(": track %d, head %d, sector %d, size %d", | |
1424 | R_TRACK, R_HEAD, R_SECTOR, R_SIZECODE); | |
1425 | } /* tell_sector */ | |
1426 | ||
1427 | /* | |
1428 | * OK, this error interpreting routine is called after a | |
1429 | * DMA read/write has succeeded | |
1430 | * or failed, so we check the results, and copy any buffers. | |
1431 | * hhb: Added better error reporting. | |
1432 | * ak: Made this into a separate routine. | |
1433 | */ | |
1434 | static int interpret_errors(void) | |
1435 | { | |
1436 | char bad; | |
1437 | ||
1438 | if (inr != 7) { | |
1439 | DPRINT("-- FDC reply error"); | |
1440 | FDCS->reset = 1; | |
1441 | return 1; | |
1442 | } | |
1443 | ||
1444 | /* check IC to find cause of interrupt */ | |
1445 | switch (ST0 & ST0_INTR) { | |
1446 | case 0x40: /* error occurred during command execution */ | |
1447 | if (ST1 & ST1_EOC) | |
1448 | return 0; /* occurs with pseudo-DMA */ | |
1449 | bad = 1; | |
1450 | if (ST1 & ST1_WP) { | |
1451 | DPRINT("Drive is write protected\n"); | |
1452 | CLEARF(FD_DISK_WRITABLE); | |
1453 | cont->done(0); | |
1454 | bad = 2; | |
1455 | } else if (ST1 & ST1_ND) { | |
1456 | SETF(FD_NEED_TWADDLE); | |
1457 | } else if (ST1 & ST1_OR) { | |
1458 | if (DP->flags & FTD_MSG) | |
1459 | DPRINT("Over/Underrun - retrying\n"); | |
1460 | bad = 0; | |
1461 | } else if (*errors >= DP->max_errors.reporting) { | |
1462 | DPRINT(""); | |
1463 | if (ST0 & ST0_ECE) { | |
1464 | printk("Recalibrate failed!"); | |
1465 | } else if (ST2 & ST2_CRC) { | |
1466 | printk("data CRC error"); | |
1467 | tell_sector(); | |
1468 | } else if (ST1 & ST1_CRC) { | |
1469 | printk("CRC error"); | |
1470 | tell_sector(); | |
1471 | } else if ((ST1 & (ST1_MAM | ST1_ND)) | |
1472 | || (ST2 & ST2_MAM)) { | |
1473 | if (!probing) { | |
1474 | printk("sector not found"); | |
1475 | tell_sector(); | |
1476 | } else | |
1477 | printk("probe failed..."); | |
1478 | } else if (ST2 & ST2_WC) { /* seek error */ | |
1479 | printk("wrong cylinder"); | |
1480 | } else if (ST2 & ST2_BC) { /* cylinder marked as bad */ | |
1481 | printk("bad cylinder"); | |
1482 | } else { | |
1483 | printk | |
1484 | ("unknown error. ST[0..2] are: 0x%x 0x%x 0x%x", | |
1485 | ST0, ST1, ST2); | |
1486 | tell_sector(); | |
1487 | } | |
1488 | printk("\n"); | |
1da177e4 LT |
1489 | } |
1490 | if (ST2 & ST2_WC || ST2 & ST2_BC) | |
1491 | /* wrong cylinder => recal */ | |
1492 | DRS->track = NEED_2_RECAL; | |
1493 | return bad; | |
1494 | case 0x80: /* invalid command given */ | |
1495 | DPRINT("Invalid FDC command given!\n"); | |
1496 | cont->done(0); | |
1497 | return 2; | |
1498 | case 0xc0: | |
1499 | DPRINT("Abnormal termination caused by polling\n"); | |
1500 | cont->error(); | |
1501 | return 2; | |
1502 | default: /* (0) Normal command termination */ | |
1503 | return 0; | |
1504 | } | |
1505 | } | |
1506 | ||
1507 | /* | |
1508 | * This routine is called when everything should be correctly set up | |
1509 | * for the transfer (i.e. floppy motor is on, the correct floppy is | |
1510 | * selected, and the head is sitting on the right track). | |
1511 | */ | |
1512 | static void setup_rw_floppy(void) | |
1513 | { | |
06f748c4 JJ |
1514 | int i; |
1515 | int r; | |
1516 | int flags; | |
1517 | int dflags; | |
1da177e4 LT |
1518 | unsigned long ready_date; |
1519 | timeout_fn function; | |
1520 | ||
1521 | flags = raw_cmd->flags; | |
1522 | if (flags & (FD_RAW_READ | FD_RAW_WRITE)) | |
1523 | flags |= FD_RAW_INTR; | |
1524 | ||
1525 | if ((flags & FD_RAW_SPIN) && !(flags & FD_RAW_NO_MOTOR)) { | |
1526 | ready_date = DRS->spinup_date + DP->spinup; | |
1527 | /* If spinup will take a long time, rerun scandrives | |
1528 | * again just before spinup completion. Beware that | |
1529 | * after scandrives, we must again wait for selection. | |
1530 | */ | |
50297cbf | 1531 | if (time_after(ready_date, jiffies + DP->select_delay)) { |
1da177e4 LT |
1532 | ready_date -= DP->select_delay; |
1533 | function = (timeout_fn) floppy_start; | |
1534 | } else | |
1535 | function = (timeout_fn) setup_rw_floppy; | |
1536 | ||
1537 | /* wait until the floppy is spinning fast enough */ | |
1538 | if (fd_wait_for_completion(ready_date, function)) | |
1539 | return; | |
1540 | } | |
1541 | dflags = DRS->flags; | |
1542 | ||
1543 | if ((flags & FD_RAW_READ) || (flags & FD_RAW_WRITE)) | |
1544 | setup_DMA(); | |
1545 | ||
1546 | if (flags & FD_RAW_INTR) | |
1547 | do_floppy = main_command_interrupt; | |
1548 | ||
1549 | r = 0; | |
1550 | for (i = 0; i < raw_cmd->cmd_count; i++) | |
1551 | r |= output_byte(raw_cmd->cmd[i]); | |
1552 | ||
1553 | debugt("rw_command: "); | |
1554 | ||
1555 | if (r) { | |
1556 | cont->error(); | |
1557 | reset_fdc(); | |
1558 | return; | |
1559 | } | |
1560 | ||
1561 | if (!(flags & FD_RAW_INTR)) { | |
1562 | inr = result(); | |
1563 | cont->interrupt(); | |
1564 | } else if (flags & FD_RAW_NEED_DISK) | |
1565 | fd_watchdog(); | |
1566 | } | |
1567 | ||
1568 | static int blind_seek; | |
1569 | ||
1570 | /* | |
1571 | * This is the routine called after every seek (or recalibrate) interrupt | |
1572 | * from the floppy controller. | |
1573 | */ | |
1574 | static void seek_interrupt(void) | |
1575 | { | |
1576 | debugt("seek interrupt:"); | |
1577 | if (inr != 2 || (ST0 & 0xF8) != 0x20) { | |
1578 | DPRINT("seek failed\n"); | |
1579 | DRS->track = NEED_2_RECAL; | |
1580 | cont->error(); | |
1581 | cont->redo(); | |
1582 | return; | |
1583 | } | |
1584 | if (DRS->track >= 0 && DRS->track != ST1 && !blind_seek) { | |
1585 | #ifdef DCL_DEBUG | |
1586 | if (DP->flags & FD_DEBUG) { | |
1587 | DPRINT | |
1588 | ("clearing NEWCHANGE flag because of effective seek\n"); | |
1589 | DPRINT("jiffies=%lu\n", jiffies); | |
1590 | } | |
1591 | #endif | |
1592 | CLEARF(FD_DISK_NEWCHANGE); /* effective seek */ | |
1593 | DRS->select_date = jiffies; | |
1594 | } | |
1595 | DRS->track = ST1; | |
1596 | floppy_ready(); | |
1597 | } | |
1598 | ||
1599 | static void check_wp(void) | |
1600 | { | |
1601 | if (TESTF(FD_VERIFY)) { | |
1602 | /* check write protection */ | |
1603 | output_byte(FD_GETSTATUS); | |
1604 | output_byte(UNIT(current_drive)); | |
1605 | if (result() != 1) { | |
1606 | FDCS->reset = 1; | |
1607 | return; | |
1608 | } | |
1609 | CLEARF(FD_VERIFY); | |
1610 | CLEARF(FD_NEED_TWADDLE); | |
1611 | #ifdef DCL_DEBUG | |
1612 | if (DP->flags & FD_DEBUG) { | |
1613 | DPRINT("checking whether disk is write protected\n"); | |
1614 | DPRINT("wp=%x\n", ST3 & 0x40); | |
1615 | } | |
1616 | #endif | |
1617 | if (!(ST3 & 0x40)) | |
1618 | SETF(FD_DISK_WRITABLE); | |
1619 | else | |
1620 | CLEARF(FD_DISK_WRITABLE); | |
1621 | } | |
1622 | } | |
1623 | ||
1624 | static void seek_floppy(void) | |
1625 | { | |
1626 | int track; | |
1627 | ||
1628 | blind_seek = 0; | |
1629 | ||
1630 | #ifdef DCL_DEBUG | |
1631 | if (DP->flags & FD_DEBUG) { | |
1632 | DPRINT("calling disk change from seek\n"); | |
1633 | } | |
1634 | #endif | |
1635 | ||
1636 | if (!TESTF(FD_DISK_NEWCHANGE) && | |
1637 | disk_change(current_drive) && (raw_cmd->flags & FD_RAW_NEED_DISK)) { | |
1638 | /* the media changed flag should be cleared after the seek. | |
1639 | * If it isn't, this means that there is really no disk in | |
1640 | * the drive. | |
1641 | */ | |
1642 | SETF(FD_DISK_CHANGED); | |
1643 | cont->done(0); | |
1644 | cont->redo(); | |
1645 | return; | |
1646 | } | |
1647 | if (DRS->track <= NEED_1_RECAL) { | |
1648 | recalibrate_floppy(); | |
1649 | return; | |
1650 | } else if (TESTF(FD_DISK_NEWCHANGE) && | |
1651 | (raw_cmd->flags & FD_RAW_NEED_DISK) && | |
1652 | (DRS->track <= NO_TRACK || DRS->track == raw_cmd->track)) { | |
1653 | /* we seek to clear the media-changed condition. Does anybody | |
1654 | * know a more elegant way, which works on all drives? */ | |
1655 | if (raw_cmd->track) | |
1656 | track = raw_cmd->track - 1; | |
1657 | else { | |
1658 | if (DP->flags & FD_SILENT_DCL_CLEAR) { | |
1659 | set_dor(fdc, ~(0x10 << UNIT(current_drive)), 0); | |
1660 | blind_seek = 1; | |
1661 | raw_cmd->flags |= FD_RAW_NEED_SEEK; | |
1662 | } | |
1663 | track = 1; | |
1664 | } | |
1665 | } else { | |
1666 | check_wp(); | |
1667 | if (raw_cmd->track != DRS->track && | |
1668 | (raw_cmd->flags & FD_RAW_NEED_SEEK)) | |
1669 | track = raw_cmd->track; | |
1670 | else { | |
1671 | setup_rw_floppy(); | |
1672 | return; | |
1673 | } | |
1674 | } | |
1675 | ||
1676 | do_floppy = seek_interrupt; | |
1677 | output_byte(FD_SEEK); | |
1678 | output_byte(UNIT(current_drive)); | |
1679 | LAST_OUT(track); | |
1680 | debugt("seek command:"); | |
1681 | } | |
1682 | ||
1683 | static void recal_interrupt(void) | |
1684 | { | |
1685 | debugt("recal interrupt:"); | |
1686 | if (inr != 2) | |
1687 | FDCS->reset = 1; | |
1688 | else if (ST0 & ST0_ECE) { | |
1689 | switch (DRS->track) { | |
1690 | case NEED_1_RECAL: | |
1691 | debugt("recal interrupt need 1 recal:"); | |
1692 | /* after a second recalibrate, we still haven't | |
1693 | * reached track 0. Probably no drive. Raise an | |
1694 | * error, as failing immediately might upset | |
1695 | * computers possessed by the Devil :-) */ | |
1696 | cont->error(); | |
1697 | cont->redo(); | |
1698 | return; | |
1699 | case NEED_2_RECAL: | |
1700 | debugt("recal interrupt need 2 recal:"); | |
1701 | /* If we already did a recalibrate, | |
1702 | * and we are not at track 0, this | |
1703 | * means we have moved. (The only way | |
1704 | * not to move at recalibration is to | |
1705 | * be already at track 0.) Clear the | |
1706 | * new change flag */ | |
1707 | #ifdef DCL_DEBUG | |
1708 | if (DP->flags & FD_DEBUG) { | |
1709 | DPRINT | |
1710 | ("clearing NEWCHANGE flag because of second recalibrate\n"); | |
1711 | } | |
1712 | #endif | |
1713 | ||
1714 | CLEARF(FD_DISK_NEWCHANGE); | |
1715 | DRS->select_date = jiffies; | |
1716 | /* fall through */ | |
1717 | default: | |
1718 | debugt("recal interrupt default:"); | |
1719 | /* Recalibrate moves the head by at | |
1720 | * most 80 steps. If after one | |
1721 | * recalibrate we don't have reached | |
1722 | * track 0, this might mean that we | |
1723 | * started beyond track 80. Try | |
1724 | * again. */ | |
1725 | DRS->track = NEED_1_RECAL; | |
1726 | break; | |
1727 | } | |
1728 | } else | |
1729 | DRS->track = ST1; | |
1730 | floppy_ready(); | |
1731 | } | |
1732 | ||
1733 | static void print_result(char *message, int inr) | |
1734 | { | |
1735 | int i; | |
1736 | ||
1737 | DPRINT("%s ", message); | |
1738 | if (inr >= 0) | |
1739 | for (i = 0; i < inr; i++) | |
1740 | printk("repl[%d]=%x ", i, reply_buffer[i]); | |
1741 | printk("\n"); | |
1742 | } | |
1743 | ||
1744 | /* interrupt handler. Note that this can be called externally on the Sparc */ | |
7d12e780 | 1745 | irqreturn_t floppy_interrupt(int irq, void *dev_id) |
1da177e4 | 1746 | { |
1da177e4 LT |
1747 | int do_print; |
1748 | unsigned long f; | |
06f748c4 | 1749 | void (*handler)(void) = do_floppy; |
1da177e4 LT |
1750 | |
1751 | lasthandler = handler; | |
1752 | interruptjiffies = jiffies; | |
1753 | ||
1754 | f = claim_dma_lock(); | |
1755 | fd_disable_dma(); | |
1756 | release_dma_lock(f); | |
1757 | ||
1758 | floppy_enable_hlt(); | |
1759 | do_floppy = NULL; | |
1760 | if (fdc >= N_FDC || FDCS->address == -1) { | |
1761 | /* we don't even know which FDC is the culprit */ | |
1762 | printk("DOR0=%x\n", fdc_state[0].dor); | |
1763 | printk("floppy interrupt on bizarre fdc %d\n", fdc); | |
1764 | printk("handler=%p\n", handler); | |
1765 | is_alive("bizarre fdc"); | |
1766 | return IRQ_NONE; | |
1767 | } | |
1768 | ||
1769 | FDCS->reset = 0; | |
1770 | /* We have to clear the reset flag here, because apparently on boxes | |
1771 | * with level triggered interrupts (PS/2, Sparc, ...), it is needed to | |
1772 | * emit SENSEI's to clear the interrupt line. And FDCS->reset blocks the | |
1773 | * emission of the SENSEI's. | |
1774 | * It is OK to emit floppy commands because we are in an interrupt | |
1775 | * handler here, and thus we have to fear no interference of other | |
1776 | * activity. | |
1777 | */ | |
1778 | ||
1779 | do_print = !handler && print_unex && !initialising; | |
1780 | ||
1781 | inr = result(); | |
1782 | if (do_print) | |
1783 | print_result("unexpected interrupt", inr); | |
1784 | if (inr == 0) { | |
1785 | int max_sensei = 4; | |
1786 | do { | |
1787 | output_byte(FD_SENSEI); | |
1788 | inr = result(); | |
1789 | if (do_print) | |
1790 | print_result("sensei", inr); | |
1791 | max_sensei--; | |
1792 | } while ((ST0 & 0x83) != UNIT(current_drive) && inr == 2 | |
1793 | && max_sensei); | |
1794 | } | |
1795 | if (!handler) { | |
1796 | FDCS->reset = 1; | |
1797 | return IRQ_NONE; | |
1798 | } | |
1799 | schedule_bh(handler); | |
1800 | is_alive("normal interrupt end"); | |
1801 | ||
1802 | /* FIXME! Was it really for us? */ | |
1803 | return IRQ_HANDLED; | |
1804 | } | |
1805 | ||
1806 | static void recalibrate_floppy(void) | |
1807 | { | |
1808 | debugt("recalibrate floppy:"); | |
1809 | do_floppy = recal_interrupt; | |
1810 | output_byte(FD_RECALIBRATE); | |
1811 | LAST_OUT(UNIT(current_drive)); | |
1812 | } | |
1813 | ||
1814 | /* | |
1815 | * Must do 4 FD_SENSEIs after reset because of ``drive polling''. | |
1816 | */ | |
1817 | static void reset_interrupt(void) | |
1818 | { | |
1819 | debugt("reset interrupt:"); | |
1820 | result(); /* get the status ready for set_fdc */ | |
1821 | if (FDCS->reset) { | |
1822 | printk("reset set in interrupt, calling %p\n", cont->error); | |
1823 | cont->error(); /* a reset just after a reset. BAD! */ | |
1824 | } | |
1825 | cont->redo(); | |
1826 | } | |
1827 | ||
1828 | /* | |
1829 | * reset is done by pulling bit 2 of DOR low for a while (old FDCs), | |
1830 | * or by setting the self clearing bit 7 of STATUS (newer FDCs) | |
1831 | */ | |
1832 | static void reset_fdc(void) | |
1833 | { | |
1834 | unsigned long flags; | |
1835 | ||
1836 | do_floppy = reset_interrupt; | |
1837 | FDCS->reset = 0; | |
1838 | reset_fdc_info(0); | |
1839 | ||
1840 | /* Pseudo-DMA may intercept 'reset finished' interrupt. */ | |
1841 | /* Irrelevant for systems with true DMA (i386). */ | |
1842 | ||
1843 | flags = claim_dma_lock(); | |
1844 | fd_disable_dma(); | |
1845 | release_dma_lock(flags); | |
1846 | ||
1847 | if (FDCS->version >= FDC_82072A) | |
1848 | fd_outb(0x80 | (FDCS->dtr & 3), FD_STATUS); | |
1849 | else { | |
1850 | fd_outb(FDCS->dor & ~0x04, FD_DOR); | |
1851 | udelay(FD_RESET_DELAY); | |
1852 | fd_outb(FDCS->dor, FD_DOR); | |
1853 | } | |
1854 | } | |
1855 | ||
1856 | static void show_floppy(void) | |
1857 | { | |
1858 | int i; | |
1859 | ||
1860 | printk("\n"); | |
1861 | printk("floppy driver state\n"); | |
1862 | printk("-------------------\n"); | |
1863 | printk("now=%lu last interrupt=%lu diff=%lu last called handler=%p\n", | |
1864 | jiffies, interruptjiffies, jiffies - interruptjiffies, | |
1865 | lasthandler); | |
1866 | ||
1867 | #ifdef FLOPPY_SANITY_CHECK | |
1868 | printk("timeout_message=%s\n", timeout_message); | |
1869 | printk("last output bytes:\n"); | |
1870 | for (i = 0; i < OLOGSIZE; i++) | |
1871 | printk("%2x %2x %lu\n", | |
1872 | output_log[(i + output_log_pos) % OLOGSIZE].data, | |
1873 | output_log[(i + output_log_pos) % OLOGSIZE].status, | |
1874 | output_log[(i + output_log_pos) % OLOGSIZE].jiffies); | |
1875 | printk("last result at %lu\n", resultjiffies); | |
1876 | printk("last redo_fd_request at %lu\n", lastredo); | |
1877 | for (i = 0; i < resultsize; i++) { | |
1878 | printk("%2x ", reply_buffer[i]); | |
1879 | } | |
1880 | printk("\n"); | |
1881 | #endif | |
1882 | ||
1883 | printk("status=%x\n", fd_inb(FD_STATUS)); | |
1884 | printk("fdc_busy=%lu\n", fdc_busy); | |
1885 | if (do_floppy) | |
1886 | printk("do_floppy=%p\n", do_floppy); | |
365970a1 | 1887 | if (work_pending(&floppy_work)) |
1da177e4 LT |
1888 | printk("floppy_work.func=%p\n", floppy_work.func); |
1889 | if (timer_pending(&fd_timer)) | |
1890 | printk("fd_timer.function=%p\n", fd_timer.function); | |
1891 | if (timer_pending(&fd_timeout)) { | |
1892 | printk("timer_function=%p\n", fd_timeout.function); | |
1893 | printk("expires=%lu\n", fd_timeout.expires - jiffies); | |
1894 | printk("now=%lu\n", jiffies); | |
1895 | } | |
1896 | printk("cont=%p\n", cont); | |
1897 | printk("current_req=%p\n", current_req); | |
1898 | printk("command_status=%d\n", command_status); | |
1899 | printk("\n"); | |
1900 | } | |
1901 | ||
1902 | static void floppy_shutdown(unsigned long data) | |
1903 | { | |
1904 | unsigned long flags; | |
1905 | ||
1906 | if (!initialising) | |
1907 | show_floppy(); | |
1908 | cancel_activity(); | |
1909 | ||
1910 | floppy_enable_hlt(); | |
1911 | ||
1912 | flags = claim_dma_lock(); | |
1913 | fd_disable_dma(); | |
1914 | release_dma_lock(flags); | |
1915 | ||
1916 | /* avoid dma going to a random drive after shutdown */ | |
1917 | ||
1918 | if (!initialising) | |
1919 | DPRINT("floppy timeout called\n"); | |
1920 | FDCS->reset = 1; | |
1921 | if (cont) { | |
1922 | cont->done(0); | |
1923 | cont->redo(); /* this will recall reset when needed */ | |
1924 | } else { | |
1925 | printk("no cont in shutdown!\n"); | |
1926 | process_fd_request(); | |
1927 | } | |
1928 | is_alive("floppy shutdown"); | |
1929 | } | |
1930 | ||
1da177e4 | 1931 | /* start motor, check media-changed condition and write protection */ |
06f748c4 | 1932 | static int start_motor(void (*function)(void)) |
1da177e4 | 1933 | { |
06f748c4 JJ |
1934 | int mask; |
1935 | int data; | |
1da177e4 LT |
1936 | |
1937 | mask = 0xfc; | |
1938 | data = UNIT(current_drive); | |
1939 | if (!(raw_cmd->flags & FD_RAW_NO_MOTOR)) { | |
1940 | if (!(FDCS->dor & (0x10 << UNIT(current_drive)))) { | |
1941 | set_debugt(); | |
1942 | /* no read since this drive is running */ | |
1943 | DRS->first_read_date = 0; | |
1944 | /* note motor start time if motor is not yet running */ | |
1945 | DRS->spinup_date = jiffies; | |
1946 | data |= (0x10 << UNIT(current_drive)); | |
1947 | } | |
1948 | } else if (FDCS->dor & (0x10 << UNIT(current_drive))) | |
1949 | mask &= ~(0x10 << UNIT(current_drive)); | |
1950 | ||
1951 | /* starts motor and selects floppy */ | |
1952 | del_timer(motor_off_timer + current_drive); | |
1953 | set_dor(fdc, mask, data); | |
1954 | ||
1955 | /* wait_for_completion also schedules reset if needed. */ | |
1956 | return (fd_wait_for_completion(DRS->select_date + DP->select_delay, | |
1957 | (timeout_fn) function)); | |
1958 | } | |
1959 | ||
1960 | static void floppy_ready(void) | |
1961 | { | |
1962 | CHECK_RESET; | |
1963 | if (start_motor(floppy_ready)) | |
1964 | return; | |
1965 | if (fdc_dtr()) | |
1966 | return; | |
1967 | ||
1968 | #ifdef DCL_DEBUG | |
1969 | if (DP->flags & FD_DEBUG) { | |
1970 | DPRINT("calling disk change from floppy_ready\n"); | |
1971 | } | |
1972 | #endif | |
1973 | if (!(raw_cmd->flags & FD_RAW_NO_MOTOR) && | |
1974 | disk_change(current_drive) && !DP->select_delay) | |
1975 | twaddle(); /* this clears the dcl on certain drive/controller | |
1976 | * combinations */ | |
1977 | ||
1978 | #ifdef fd_chose_dma_mode | |
1979 | if ((raw_cmd->flags & FD_RAW_READ) || (raw_cmd->flags & FD_RAW_WRITE)) { | |
1980 | unsigned long flags = claim_dma_lock(); | |
1981 | fd_chose_dma_mode(raw_cmd->kernel_data, raw_cmd->length); | |
1982 | release_dma_lock(flags); | |
1983 | } | |
1984 | #endif | |
1985 | ||
1986 | if (raw_cmd->flags & (FD_RAW_NEED_SEEK | FD_RAW_NEED_DISK)) { | |
1987 | perpendicular_mode(); | |
1988 | fdc_specify(); /* must be done here because of hut, hlt ... */ | |
1989 | seek_floppy(); | |
1990 | } else { | |
1991 | if ((raw_cmd->flags & FD_RAW_READ) || | |
1992 | (raw_cmd->flags & FD_RAW_WRITE)) | |
1993 | fdc_specify(); | |
1994 | setup_rw_floppy(); | |
1995 | } | |
1996 | } | |
1997 | ||
1998 | static void floppy_start(void) | |
1999 | { | |
2000 | reschedule_timeout(current_reqD, "floppy start", 0); | |
2001 | ||
2002 | scandrives(); | |
2003 | #ifdef DCL_DEBUG | |
2004 | if (DP->flags & FD_DEBUG) { | |
2005 | DPRINT("setting NEWCHANGE in floppy_start\n"); | |
2006 | } | |
2007 | #endif | |
2008 | SETF(FD_DISK_NEWCHANGE); | |
2009 | floppy_ready(); | |
2010 | } | |
2011 | ||
2012 | /* | |
2013 | * ======================================================================== | |
2014 | * here ends the bottom half. Exported routines are: | |
2015 | * floppy_start, floppy_off, floppy_ready, lock_fdc, unlock_fdc, set_fdc, | |
2016 | * start_motor, reset_fdc, reset_fdc_info, interpret_errors. | |
2017 | * Initialization also uses output_byte, result, set_dor, floppy_interrupt | |
2018 | * and set_dor. | |
2019 | * ======================================================================== | |
2020 | */ | |
2021 | /* | |
2022 | * General purpose continuations. | |
2023 | * ============================== | |
2024 | */ | |
2025 | ||
2026 | static void do_wakeup(void) | |
2027 | { | |
2028 | reschedule_timeout(MAXTIMEOUT, "do wakeup", 0); | |
2029 | cont = NULL; | |
2030 | command_status += 2; | |
2031 | wake_up(&command_done); | |
2032 | } | |
2033 | ||
2034 | static struct cont_t wakeup_cont = { | |
2035 | .interrupt = empty, | |
2036 | .redo = do_wakeup, | |
2037 | .error = empty, | |
06f748c4 | 2038 | .done = (done_f)empty |
1da177e4 LT |
2039 | }; |
2040 | ||
2041 | static struct cont_t intr_cont = { | |
2042 | .interrupt = empty, | |
2043 | .redo = process_fd_request, | |
2044 | .error = empty, | |
06f748c4 | 2045 | .done = (done_f)empty |
1da177e4 LT |
2046 | }; |
2047 | ||
06f748c4 | 2048 | static int wait_til_done(void (*handler)(void), int interruptible) |
1da177e4 LT |
2049 | { |
2050 | int ret; | |
2051 | ||
2052 | schedule_bh(handler); | |
2053 | ||
2054 | if (command_status < 2 && NO_SIGNAL) { | |
2055 | DECLARE_WAITQUEUE(wait, current); | |
2056 | ||
2057 | add_wait_queue(&command_done, &wait); | |
2058 | for (;;) { | |
2059 | set_current_state(interruptible ? | |
2060 | TASK_INTERRUPTIBLE : | |
2061 | TASK_UNINTERRUPTIBLE); | |
2062 | ||
2063 | if (command_status >= 2 || !NO_SIGNAL) | |
2064 | break; | |
2065 | ||
2066 | is_alive("wait_til_done"); | |
1da177e4 LT |
2067 | schedule(); |
2068 | } | |
2069 | ||
2070 | set_current_state(TASK_RUNNING); | |
2071 | remove_wait_queue(&command_done, &wait); | |
2072 | } | |
2073 | ||
2074 | if (command_status < 2) { | |
2075 | cancel_activity(); | |
2076 | cont = &intr_cont; | |
2077 | reset_fdc(); | |
2078 | return -EINTR; | |
2079 | } | |
2080 | ||
2081 | if (FDCS->reset) | |
2082 | command_status = FD_COMMAND_ERROR; | |
2083 | if (command_status == FD_COMMAND_OKAY) | |
2084 | ret = 0; | |
2085 | else | |
2086 | ret = -EIO; | |
2087 | command_status = FD_COMMAND_NONE; | |
2088 | return ret; | |
2089 | } | |
2090 | ||
2091 | static void generic_done(int result) | |
2092 | { | |
2093 | command_status = result; | |
2094 | cont = &wakeup_cont; | |
2095 | } | |
2096 | ||
2097 | static void generic_success(void) | |
2098 | { | |
2099 | cont->done(1); | |
2100 | } | |
2101 | ||
2102 | static void generic_failure(void) | |
2103 | { | |
2104 | cont->done(0); | |
2105 | } | |
2106 | ||
2107 | static void success_and_wakeup(void) | |
2108 | { | |
2109 | generic_success(); | |
2110 | cont->redo(); | |
2111 | } | |
2112 | ||
2113 | /* | |
2114 | * formatting and rw support. | |
2115 | * ========================== | |
2116 | */ | |
2117 | ||
2118 | static int next_valid_format(void) | |
2119 | { | |
2120 | int probed_format; | |
2121 | ||
2122 | probed_format = DRS->probed_format; | |
2123 | while (1) { | |
2124 | if (probed_format >= 8 || !DP->autodetect[probed_format]) { | |
2125 | DRS->probed_format = 0; | |
2126 | return 1; | |
2127 | } | |
2128 | if (floppy_type[DP->autodetect[probed_format]].sect) { | |
2129 | DRS->probed_format = probed_format; | |
2130 | return 0; | |
2131 | } | |
2132 | probed_format++; | |
2133 | } | |
2134 | } | |
2135 | ||
2136 | static void bad_flp_intr(void) | |
2137 | { | |
2138 | int err_count; | |
2139 | ||
2140 | if (probing) { | |
2141 | DRS->probed_format++; | |
2142 | if (!next_valid_format()) | |
2143 | return; | |
2144 | } | |
2145 | err_count = ++(*errors); | |
2146 | INFBOUND(DRWE->badness, err_count); | |
2147 | if (err_count > DP->max_errors.abort) | |
2148 | cont->done(0); | |
2149 | if (err_count > DP->max_errors.reset) | |
2150 | FDCS->reset = 1; | |
2151 | else if (err_count > DP->max_errors.recal) | |
2152 | DRS->track = NEED_2_RECAL; | |
2153 | } | |
2154 | ||
2155 | static void set_floppy(int drive) | |
2156 | { | |
2157 | int type = ITYPE(UDRS->fd_device); | |
06f748c4 | 2158 | |
1da177e4 LT |
2159 | if (type) |
2160 | _floppy = floppy_type + type; | |
2161 | else | |
2162 | _floppy = current_type[drive]; | |
2163 | } | |
2164 | ||
2165 | /* | |
2166 | * formatting support. | |
2167 | * =================== | |
2168 | */ | |
2169 | static void format_interrupt(void) | |
2170 | { | |
2171 | switch (interpret_errors()) { | |
2172 | case 1: | |
2173 | cont->error(); | |
2174 | case 2: | |
2175 | break; | |
2176 | case 0: | |
2177 | cont->done(1); | |
2178 | } | |
2179 | cont->redo(); | |
2180 | } | |
2181 | ||
2182 | #define CODE2SIZE (ssize = ((1 << SIZECODE) + 3) >> 2) | |
2183 | #define FM_MODE(x,y) ((y) & ~(((x)->rate & 0x80) >>1)) | |
2184 | #define CT(x) ((x) | 0xc0) | |
2185 | static void setup_format_params(int track) | |
2186 | { | |
06f748c4 JJ |
2187 | int n; |
2188 | int il; | |
2189 | int count; | |
2190 | int head_shift; | |
2191 | int track_shift; | |
1da177e4 LT |
2192 | struct fparm { |
2193 | unsigned char track, head, sect, size; | |
2194 | } *here = (struct fparm *)floppy_track_buffer; | |
1da177e4 LT |
2195 | |
2196 | raw_cmd = &default_raw_cmd; | |
2197 | raw_cmd->track = track; | |
2198 | ||
2199 | raw_cmd->flags = FD_RAW_WRITE | FD_RAW_INTR | FD_RAW_SPIN | | |
2200 | FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK; | |
2201 | raw_cmd->rate = _floppy->rate & 0x43; | |
2202 | raw_cmd->cmd_count = NR_F; | |
2203 | COMMAND = FM_MODE(_floppy, FD_FORMAT); | |
2204 | DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, format_req.head); | |
2205 | F_SIZECODE = FD_SIZECODE(_floppy); | |
2206 | F_SECT_PER_TRACK = _floppy->sect << 2 >> F_SIZECODE; | |
2207 | F_GAP = _floppy->fmt_gap; | |
2208 | F_FILL = FD_FILL_BYTE; | |
2209 | ||
2210 | raw_cmd->kernel_data = floppy_track_buffer; | |
2211 | raw_cmd->length = 4 * F_SECT_PER_TRACK; | |
2212 | ||
2213 | /* allow for about 30ms for data transport per track */ | |
2214 | head_shift = (F_SECT_PER_TRACK + 5) / 6; | |
2215 | ||
2216 | /* a ``cylinder'' is two tracks plus a little stepping time */ | |
2217 | track_shift = 2 * head_shift + 3; | |
2218 | ||
2219 | /* position of logical sector 1 on this track */ | |
2220 | n = (track_shift * format_req.track + head_shift * format_req.head) | |
2221 | % F_SECT_PER_TRACK; | |
2222 | ||
2223 | /* determine interleave */ | |
2224 | il = 1; | |
2225 | if (_floppy->fmt_gap < 0x22) | |
2226 | il++; | |
2227 | ||
2228 | /* initialize field */ | |
2229 | for (count = 0; count < F_SECT_PER_TRACK; ++count) { | |
2230 | here[count].track = format_req.track; | |
2231 | here[count].head = format_req.head; | |
2232 | here[count].sect = 0; | |
2233 | here[count].size = F_SIZECODE; | |
2234 | } | |
2235 | /* place logical sectors */ | |
2236 | for (count = 1; count <= F_SECT_PER_TRACK; ++count) { | |
2237 | here[n].sect = count; | |
2238 | n = (n + il) % F_SECT_PER_TRACK; | |
2239 | if (here[n].sect) { /* sector busy, find next free sector */ | |
2240 | ++n; | |
2241 | if (n >= F_SECT_PER_TRACK) { | |
2242 | n -= F_SECT_PER_TRACK; | |
2243 | while (here[n].sect) | |
2244 | ++n; | |
2245 | } | |
2246 | } | |
2247 | } | |
9e49184c | 2248 | if (_floppy->stretch & FD_SECTBASEMASK) { |
1da177e4 | 2249 | for (count = 0; count < F_SECT_PER_TRACK; count++) |
9e49184c | 2250 | here[count].sect += FD_SECTBASE(_floppy) - 1; |
1da177e4 LT |
2251 | } |
2252 | } | |
2253 | ||
2254 | static void redo_format(void) | |
2255 | { | |
2256 | buffer_track = -1; | |
2257 | setup_format_params(format_req.track << STRETCH(_floppy)); | |
2258 | floppy_start(); | |
2259 | debugt("queue format request"); | |
2260 | } | |
2261 | ||
2262 | static struct cont_t format_cont = { | |
2263 | .interrupt = format_interrupt, | |
2264 | .redo = redo_format, | |
2265 | .error = bad_flp_intr, | |
2266 | .done = generic_done | |
2267 | }; | |
2268 | ||
2269 | static int do_format(int drive, struct format_descr *tmp_format_req) | |
2270 | { | |
2271 | int ret; | |
2272 | ||
2273 | LOCK_FDC(drive, 1); | |
2274 | set_floppy(drive); | |
2275 | if (!_floppy || | |
2276 | _floppy->track > DP->tracks || | |
2277 | tmp_format_req->track >= _floppy->track || | |
2278 | tmp_format_req->head >= _floppy->head || | |
2279 | (_floppy->sect << 2) % (1 << FD_SIZECODE(_floppy)) || | |
2280 | !_floppy->fmt_gap) { | |
2281 | process_fd_request(); | |
2282 | return -EINVAL; | |
2283 | } | |
2284 | format_req = *tmp_format_req; | |
2285 | format_errors = 0; | |
2286 | cont = &format_cont; | |
2287 | errors = &format_errors; | |
2288 | IWAIT(redo_format); | |
2289 | process_fd_request(); | |
2290 | return ret; | |
2291 | } | |
2292 | ||
2293 | /* | |
2294 | * Buffer read/write and support | |
2295 | * ============================= | |
2296 | */ | |
2297 | ||
1c5093ba | 2298 | static void floppy_end_request(struct request *req, int error) |
1da177e4 LT |
2299 | { |
2300 | unsigned int nr_sectors = current_count_sectors; | |
1c5093ba | 2301 | unsigned int drive = (unsigned long)req->rq_disk->private_data; |
1da177e4 LT |
2302 | |
2303 | /* current_count_sectors can be zero if transfer failed */ | |
1c5093ba | 2304 | if (error) |
1da177e4 | 2305 | nr_sectors = req->current_nr_sectors; |
1c5093ba | 2306 | if (__blk_end_request(req, error, nr_sectors << 9)) |
1da177e4 | 2307 | return; |
1da177e4 LT |
2308 | |
2309 | /* We're done with the request */ | |
1c5093ba | 2310 | floppy_off(drive); |
1da177e4 LT |
2311 | current_req = NULL; |
2312 | } | |
2313 | ||
2314 | /* new request_done. Can handle physical sectors which are smaller than a | |
2315 | * logical buffer */ | |
2316 | static void request_done(int uptodate) | |
2317 | { | |
2318 | struct request_queue *q = floppy_queue; | |
2319 | struct request *req = current_req; | |
2320 | unsigned long flags; | |
2321 | int block; | |
2322 | ||
2323 | probing = 0; | |
2324 | reschedule_timeout(MAXTIMEOUT, "request done %d", uptodate); | |
2325 | ||
2326 | if (!req) { | |
2327 | printk("floppy.c: no request in request_done\n"); | |
2328 | return; | |
2329 | } | |
2330 | ||
2331 | if (uptodate) { | |
2332 | /* maintain values for invalidation on geometry | |
2333 | * change */ | |
2334 | block = current_count_sectors + req->sector; | |
2335 | INFBOUND(DRS->maxblock, block); | |
2336 | if (block > _floppy->sect) | |
2337 | DRS->maxtrack = 1; | |
2338 | ||
2339 | /* unlock chained buffers */ | |
2340 | spin_lock_irqsave(q->queue_lock, flags); | |
1c5093ba | 2341 | floppy_end_request(req, 0); |
1da177e4 LT |
2342 | spin_unlock_irqrestore(q->queue_lock, flags); |
2343 | } else { | |
2344 | if (rq_data_dir(req) == WRITE) { | |
2345 | /* record write error information */ | |
2346 | DRWE->write_errors++; | |
2347 | if (DRWE->write_errors == 1) { | |
2348 | DRWE->first_error_sector = req->sector; | |
2349 | DRWE->first_error_generation = DRS->generation; | |
2350 | } | |
2351 | DRWE->last_error_sector = req->sector; | |
2352 | DRWE->last_error_generation = DRS->generation; | |
2353 | } | |
2354 | spin_lock_irqsave(q->queue_lock, flags); | |
1c5093ba | 2355 | floppy_end_request(req, -EIO); |
1da177e4 LT |
2356 | spin_unlock_irqrestore(q->queue_lock, flags); |
2357 | } | |
2358 | } | |
2359 | ||
2360 | /* Interrupt handler evaluating the result of the r/w operation */ | |
2361 | static void rw_interrupt(void) | |
2362 | { | |
06f748c4 JJ |
2363 | int eoc; |
2364 | int ssize; | |
2365 | int heads; | |
2366 | int nr_sectors; | |
1da177e4 LT |
2367 | |
2368 | if (R_HEAD >= 2) { | |
2369 | /* some Toshiba floppy controllers occasionnally seem to | |
2370 | * return bogus interrupts after read/write operations, which | |
2371 | * can be recognized by a bad head number (>= 2) */ | |
2372 | return; | |
2373 | } | |
2374 | ||
2375 | if (!DRS->first_read_date) | |
2376 | DRS->first_read_date = jiffies; | |
2377 | ||
2378 | nr_sectors = 0; | |
2379 | CODE2SIZE; | |
2380 | ||
2381 | if (ST1 & ST1_EOC) | |
2382 | eoc = 1; | |
2383 | else | |
2384 | eoc = 0; | |
2385 | ||
2386 | if (COMMAND & 0x80) | |
2387 | heads = 2; | |
2388 | else | |
2389 | heads = 1; | |
2390 | ||
2391 | nr_sectors = (((R_TRACK - TRACK) * heads + | |
2392 | R_HEAD - HEAD) * SECT_PER_TRACK + | |
2393 | R_SECTOR - SECTOR + eoc) << SIZECODE >> 2; | |
2394 | ||
2395 | #ifdef FLOPPY_SANITY_CHECK | |
2396 | if (nr_sectors / ssize > | |
061837bc | 2397 | DIV_ROUND_UP(in_sector_offset + current_count_sectors, ssize)) { |
1da177e4 LT |
2398 | DPRINT("long rw: %x instead of %lx\n", |
2399 | nr_sectors, current_count_sectors); | |
2400 | printk("rs=%d s=%d\n", R_SECTOR, SECTOR); | |
2401 | printk("rh=%d h=%d\n", R_HEAD, HEAD); | |
2402 | printk("rt=%d t=%d\n", R_TRACK, TRACK); | |
2403 | printk("heads=%d eoc=%d\n", heads, eoc); | |
2404 | printk("spt=%d st=%d ss=%d\n", SECT_PER_TRACK, | |
2405 | fsector_t, ssize); | |
2406 | printk("in_sector_offset=%d\n", in_sector_offset); | |
2407 | } | |
2408 | #endif | |
2409 | ||
2410 | nr_sectors -= in_sector_offset; | |
2411 | INFBOUND(nr_sectors, 0); | |
2412 | SUPBOUND(current_count_sectors, nr_sectors); | |
2413 | ||
2414 | switch (interpret_errors()) { | |
2415 | case 2: | |
2416 | cont->redo(); | |
2417 | return; | |
2418 | case 1: | |
2419 | if (!current_count_sectors) { | |
2420 | cont->error(); | |
2421 | cont->redo(); | |
2422 | return; | |
2423 | } | |
2424 | break; | |
2425 | case 0: | |
2426 | if (!current_count_sectors) { | |
2427 | cont->redo(); | |
2428 | return; | |
2429 | } | |
2430 | current_type[current_drive] = _floppy; | |
2431 | floppy_sizes[TOMINOR(current_drive)] = _floppy->size; | |
2432 | break; | |
2433 | } | |
2434 | ||
2435 | if (probing) { | |
2436 | if (DP->flags & FTD_MSG) | |
2437 | DPRINT("Auto-detected floppy type %s in fd%d\n", | |
2438 | _floppy->name, current_drive); | |
2439 | current_type[current_drive] = _floppy; | |
2440 | floppy_sizes[TOMINOR(current_drive)] = _floppy->size; | |
2441 | probing = 0; | |
2442 | } | |
2443 | ||
2444 | if (CT(COMMAND) != FD_READ || | |
2445 | raw_cmd->kernel_data == current_req->buffer) { | |
2446 | /* transfer directly from buffer */ | |
2447 | cont->done(1); | |
2448 | } else if (CT(COMMAND) == FD_READ) { | |
2449 | buffer_track = raw_cmd->track; | |
2450 | buffer_drive = current_drive; | |
2451 | INFBOUND(buffer_max, nr_sectors + fsector_t); | |
2452 | } | |
2453 | cont->redo(); | |
2454 | } | |
2455 | ||
2456 | /* Compute maximal contiguous buffer size. */ | |
2457 | static int buffer_chain_size(void) | |
2458 | { | |
1da177e4 | 2459 | struct bio_vec *bv; |
5705f702 N |
2460 | int size; |
2461 | struct req_iterator iter; | |
1da177e4 LT |
2462 | char *base; |
2463 | ||
2464 | base = bio_data(current_req->bio); | |
2465 | size = 0; | |
2466 | ||
5705f702 N |
2467 | rq_for_each_segment(bv, current_req, iter) { |
2468 | if (page_address(bv->bv_page) + bv->bv_offset != base + size) | |
2469 | break; | |
1da177e4 | 2470 | |
5705f702 | 2471 | size += bv->bv_len; |
1da177e4 LT |
2472 | } |
2473 | ||
2474 | return size >> 9; | |
2475 | } | |
2476 | ||
2477 | /* Compute the maximal transfer size */ | |
2478 | static int transfer_size(int ssize, int max_sector, int max_size) | |
2479 | { | |
2480 | SUPBOUND(max_sector, fsector_t + max_size); | |
2481 | ||
2482 | /* alignment */ | |
2483 | max_sector -= (max_sector % _floppy->sect) % ssize; | |
2484 | ||
2485 | /* transfer size, beginning not aligned */ | |
2486 | current_count_sectors = max_sector - fsector_t; | |
2487 | ||
2488 | return max_sector; | |
2489 | } | |
2490 | ||
2491 | /* | |
2492 | * Move data from/to the track buffer to/from the buffer cache. | |
2493 | */ | |
2494 | static void copy_buffer(int ssize, int max_sector, int max_sector_2) | |
2495 | { | |
2496 | int remaining; /* number of transferred 512-byte sectors */ | |
2497 | struct bio_vec *bv; | |
06f748c4 JJ |
2498 | char *buffer; |
2499 | char *dma_buffer; | |
5705f702 N |
2500 | int size; |
2501 | struct req_iterator iter; | |
1da177e4 LT |
2502 | |
2503 | max_sector = transfer_size(ssize, | |
2504 | min(max_sector, max_sector_2), | |
2505 | current_req->nr_sectors); | |
2506 | ||
2507 | if (current_count_sectors <= 0 && CT(COMMAND) == FD_WRITE && | |
2508 | buffer_max > fsector_t + current_req->nr_sectors) | |
2509 | current_count_sectors = min_t(int, buffer_max - fsector_t, | |
2510 | current_req->nr_sectors); | |
2511 | ||
2512 | remaining = current_count_sectors << 9; | |
2513 | #ifdef FLOPPY_SANITY_CHECK | |
2514 | if ((remaining >> 9) > current_req->nr_sectors && | |
2515 | CT(COMMAND) == FD_WRITE) { | |
2516 | DPRINT("in copy buffer\n"); | |
2517 | printk("current_count_sectors=%ld\n", current_count_sectors); | |
2518 | printk("remaining=%d\n", remaining >> 9); | |
2519 | printk("current_req->nr_sectors=%ld\n", | |
2520 | current_req->nr_sectors); | |
2521 | printk("current_req->current_nr_sectors=%u\n", | |
2522 | current_req->current_nr_sectors); | |
2523 | printk("max_sector=%d\n", max_sector); | |
2524 | printk("ssize=%d\n", ssize); | |
2525 | } | |
2526 | #endif | |
2527 | ||
2528 | buffer_max = max(max_sector, buffer_max); | |
2529 | ||
2530 | dma_buffer = floppy_track_buffer + ((fsector_t - buffer_min) << 9); | |
2531 | ||
2532 | size = current_req->current_nr_sectors << 9; | |
2533 | ||
5705f702 N |
2534 | rq_for_each_segment(bv, current_req, iter) { |
2535 | if (!remaining) | |
2536 | break; | |
1da177e4 | 2537 | |
5705f702 N |
2538 | size = bv->bv_len; |
2539 | SUPBOUND(size, remaining); | |
1da177e4 | 2540 | |
5705f702 | 2541 | buffer = page_address(bv->bv_page) + bv->bv_offset; |
1da177e4 | 2542 | #ifdef FLOPPY_SANITY_CHECK |
5705f702 N |
2543 | if (dma_buffer + size > |
2544 | floppy_track_buffer + (max_buffer_sectors << 10) || | |
2545 | dma_buffer < floppy_track_buffer) { | |
2546 | DPRINT("buffer overrun in copy buffer %d\n", | |
2547 | (int)((floppy_track_buffer - | |
2548 | dma_buffer) >> 9)); | |
2549 | printk("fsector_t=%d buffer_min=%d\n", | |
2550 | fsector_t, buffer_min); | |
2551 | printk("current_count_sectors=%ld\n", | |
2552 | current_count_sectors); | |
1da177e4 | 2553 | if (CT(COMMAND) == FD_READ) |
5705f702 N |
2554 | printk("read\n"); |
2555 | if (CT(COMMAND) == FD_WRITE) | |
2556 | printk("write\n"); | |
2557 | break; | |
1da177e4 | 2558 | } |
5705f702 N |
2559 | if (((unsigned long)buffer) % 512) |
2560 | DPRINT("%p buffer not aligned\n", buffer); | |
2561 | #endif | |
2562 | if (CT(COMMAND) == FD_READ) | |
2563 | memcpy(buffer, dma_buffer, size); | |
2564 | else | |
2565 | memcpy(dma_buffer, buffer, size); | |
2566 | ||
2567 | remaining -= size; | |
2568 | dma_buffer += size; | |
1da177e4 LT |
2569 | } |
2570 | #ifdef FLOPPY_SANITY_CHECK | |
2571 | if (remaining) { | |
2572 | if (remaining > 0) | |
2573 | max_sector -= remaining >> 9; | |
2574 | DPRINT("weirdness: remaining %d\n", remaining >> 9); | |
2575 | } | |
2576 | #endif | |
2577 | } | |
2578 | ||
1da177e4 LT |
2579 | /* work around a bug in pseudo DMA |
2580 | * (on some FDCs) pseudo DMA does not stop when the CPU stops | |
2581 | * sending data. Hence we need a different way to signal the | |
2582 | * transfer length: We use SECT_PER_TRACK. Unfortunately, this | |
2583 | * does not work with MT, hence we can only transfer one head at | |
2584 | * a time | |
2585 | */ | |
2586 | static void virtualdmabug_workaround(void) | |
2587 | { | |
06f748c4 JJ |
2588 | int hard_sectors; |
2589 | int end_sector; | |
1da177e4 LT |
2590 | |
2591 | if (CT(COMMAND) == FD_WRITE) { | |
2592 | COMMAND &= ~0x80; /* switch off multiple track mode */ | |
2593 | ||
2594 | hard_sectors = raw_cmd->length >> (7 + SIZECODE); | |
2595 | end_sector = SECTOR + hard_sectors - 1; | |
2596 | #ifdef FLOPPY_SANITY_CHECK | |
2597 | if (end_sector > SECT_PER_TRACK) { | |
2598 | printk("too many sectors %d > %d\n", | |
2599 | end_sector, SECT_PER_TRACK); | |
2600 | return; | |
2601 | } | |
2602 | #endif | |
2603 | SECT_PER_TRACK = end_sector; /* make sure SECT_PER_TRACK points | |
2604 | * to end of transfer */ | |
2605 | } | |
2606 | } | |
2607 | ||
2608 | /* | |
2609 | * Formulate a read/write request. | |
2610 | * this routine decides where to load the data (directly to buffer, or to | |
2611 | * tmp floppy area), how much data to load (the size of the buffer, the whole | |
2612 | * track, or a single sector) | |
2613 | * All floppy_track_buffer handling goes in here. If we ever add track buffer | |
2614 | * allocation on the fly, it should be done here. No other part should need | |
2615 | * modification. | |
2616 | */ | |
2617 | ||
2618 | static int make_raw_rw_request(void) | |
2619 | { | |
2620 | int aligned_sector_t; | |
06f748c4 JJ |
2621 | int max_sector; |
2622 | int max_size; | |
2623 | int tracksize; | |
2624 | int ssize; | |
1da177e4 LT |
2625 | |
2626 | if (max_buffer_sectors == 0) { | |
2627 | printk("VFS: Block I/O scheduled on unopened device\n"); | |
2628 | return 0; | |
2629 | } | |
2630 | ||
2631 | set_fdc((long)current_req->rq_disk->private_data); | |
2632 | ||
2633 | raw_cmd = &default_raw_cmd; | |
2634 | raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_DISK | FD_RAW_NEED_DISK | | |
2635 | FD_RAW_NEED_SEEK; | |
2636 | raw_cmd->cmd_count = NR_RW; | |
2637 | if (rq_data_dir(current_req) == READ) { | |
2638 | raw_cmd->flags |= FD_RAW_READ; | |
2639 | COMMAND = FM_MODE(_floppy, FD_READ); | |
2640 | } else if (rq_data_dir(current_req) == WRITE) { | |
2641 | raw_cmd->flags |= FD_RAW_WRITE; | |
2642 | COMMAND = FM_MODE(_floppy, FD_WRITE); | |
2643 | } else { | |
2644 | DPRINT("make_raw_rw_request: unknown command\n"); | |
2645 | return 0; | |
2646 | } | |
2647 | ||
2648 | max_sector = _floppy->sect * _floppy->head; | |
2649 | ||
2650 | TRACK = (int)current_req->sector / max_sector; | |
2651 | fsector_t = (int)current_req->sector % max_sector; | |
2652 | if (_floppy->track && TRACK >= _floppy->track) { | |
2653 | if (current_req->current_nr_sectors & 1) { | |
2654 | current_count_sectors = 1; | |
2655 | return 1; | |
2656 | } else | |
2657 | return 0; | |
2658 | } | |
2659 | HEAD = fsector_t / _floppy->sect; | |
2660 | ||
9e49184c | 2661 | if (((_floppy->stretch & (FD_SWAPSIDES | FD_SECTBASEMASK)) || |
1da177e4 LT |
2662 | TESTF(FD_NEED_TWADDLE)) && fsector_t < _floppy->sect) |
2663 | max_sector = _floppy->sect; | |
2664 | ||
2665 | /* 2M disks have phantom sectors on the first track */ | |
2666 | if ((_floppy->rate & FD_2M) && (!TRACK) && (!HEAD)) { | |
2667 | max_sector = 2 * _floppy->sect / 3; | |
2668 | if (fsector_t >= max_sector) { | |
2669 | current_count_sectors = | |
2670 | min_t(int, _floppy->sect - fsector_t, | |
2671 | current_req->nr_sectors); | |
2672 | return 1; | |
2673 | } | |
2674 | SIZECODE = 2; | |
2675 | } else | |
2676 | SIZECODE = FD_SIZECODE(_floppy); | |
2677 | raw_cmd->rate = _floppy->rate & 0x43; | |
2678 | if ((_floppy->rate & FD_2M) && (TRACK || HEAD) && raw_cmd->rate == 2) | |
2679 | raw_cmd->rate = 1; | |
2680 | ||
2681 | if (SIZECODE) | |
2682 | SIZECODE2 = 0xff; | |
2683 | else | |
2684 | SIZECODE2 = 0x80; | |
2685 | raw_cmd->track = TRACK << STRETCH(_floppy); | |
2686 | DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, HEAD); | |
2687 | GAP = _floppy->gap; | |
2688 | CODE2SIZE; | |
2689 | SECT_PER_TRACK = _floppy->sect << 2 >> SIZECODE; | |
2690 | SECTOR = ((fsector_t % _floppy->sect) << 2 >> SIZECODE) + | |
9e49184c | 2691 | FD_SECTBASE(_floppy); |
1da177e4 LT |
2692 | |
2693 | /* tracksize describes the size which can be filled up with sectors | |
2694 | * of size ssize. | |
2695 | */ | |
2696 | tracksize = _floppy->sect - _floppy->sect % ssize; | |
2697 | if (tracksize < _floppy->sect) { | |
2698 | SECT_PER_TRACK++; | |
2699 | if (tracksize <= fsector_t % _floppy->sect) | |
2700 | SECTOR--; | |
2701 | ||
2702 | /* if we are beyond tracksize, fill up using smaller sectors */ | |
2703 | while (tracksize <= fsector_t % _floppy->sect) { | |
2704 | while (tracksize + ssize > _floppy->sect) { | |
2705 | SIZECODE--; | |
2706 | ssize >>= 1; | |
2707 | } | |
2708 | SECTOR++; | |
2709 | SECT_PER_TRACK++; | |
2710 | tracksize += ssize; | |
2711 | } | |
2712 | max_sector = HEAD * _floppy->sect + tracksize; | |
2713 | } else if (!TRACK && !HEAD && !(_floppy->rate & FD_2M) && probing) { | |
2714 | max_sector = _floppy->sect; | |
2715 | } else if (!HEAD && CT(COMMAND) == FD_WRITE) { | |
2716 | /* for virtual DMA bug workaround */ | |
2717 | max_sector = _floppy->sect; | |
2718 | } | |
2719 | ||
2720 | in_sector_offset = (fsector_t % _floppy->sect) % ssize; | |
2721 | aligned_sector_t = fsector_t - in_sector_offset; | |
2722 | max_size = current_req->nr_sectors; | |
2723 | if ((raw_cmd->track == buffer_track) && | |
2724 | (current_drive == buffer_drive) && | |
2725 | (fsector_t >= buffer_min) && (fsector_t < buffer_max)) { | |
2726 | /* data already in track buffer */ | |
2727 | if (CT(COMMAND) == FD_READ) { | |
2728 | copy_buffer(1, max_sector, buffer_max); | |
2729 | return 1; | |
2730 | } | |
2731 | } else if (in_sector_offset || current_req->nr_sectors < ssize) { | |
2732 | if (CT(COMMAND) == FD_WRITE) { | |
2733 | if (fsector_t + current_req->nr_sectors > ssize && | |
2734 | fsector_t + current_req->nr_sectors < ssize + ssize) | |
2735 | max_size = ssize + ssize; | |
2736 | else | |
2737 | max_size = ssize; | |
2738 | } | |
2739 | raw_cmd->flags &= ~FD_RAW_WRITE; | |
2740 | raw_cmd->flags |= FD_RAW_READ; | |
2741 | COMMAND = FM_MODE(_floppy, FD_READ); | |
2742 | } else if ((unsigned long)current_req->buffer < MAX_DMA_ADDRESS) { | |
2743 | unsigned long dma_limit; | |
2744 | int direct, indirect; | |
2745 | ||
2746 | indirect = | |
2747 | transfer_size(ssize, max_sector, | |
2748 | max_buffer_sectors * 2) - fsector_t; | |
2749 | ||
2750 | /* | |
2751 | * Do NOT use minimum() here---MAX_DMA_ADDRESS is 64 bits wide | |
2752 | * on a 64 bit machine! | |
2753 | */ | |
2754 | max_size = buffer_chain_size(); | |
2755 | dma_limit = | |
2756 | (MAX_DMA_ADDRESS - | |
2757 | ((unsigned long)current_req->buffer)) >> 9; | |
2758 | if ((unsigned long)max_size > dma_limit) { | |
2759 | max_size = dma_limit; | |
2760 | } | |
2761 | /* 64 kb boundaries */ | |
2762 | if (CROSS_64KB(current_req->buffer, max_size << 9)) | |
2763 | max_size = (K_64 - | |
2764 | ((unsigned long)current_req->buffer) % | |
2765 | K_64) >> 9; | |
2766 | direct = transfer_size(ssize, max_sector, max_size) - fsector_t; | |
2767 | /* | |
2768 | * We try to read tracks, but if we get too many errors, we | |
2769 | * go back to reading just one sector at a time. | |
2770 | * | |
2771 | * This means we should be able to read a sector even if there | |
2772 | * are other bad sectors on this track. | |
2773 | */ | |
2774 | if (!direct || | |
2775 | (indirect * 2 > direct * 3 && | |
aee9041c | 2776 | *errors < DP->max_errors.read_track && ((!probing |
1da177e4 LT |
2777 | || (DP->read_track & (1 << DRS->probed_format)))))) { |
2778 | max_size = current_req->nr_sectors; | |
2779 | } else { | |
2780 | raw_cmd->kernel_data = current_req->buffer; | |
2781 | raw_cmd->length = current_count_sectors << 9; | |
2782 | if (raw_cmd->length == 0) { | |
2783 | DPRINT | |
2784 | ("zero dma transfer attempted from make_raw_request\n"); | |
2785 | DPRINT("indirect=%d direct=%d fsector_t=%d", | |
2786 | indirect, direct, fsector_t); | |
2787 | return 0; | |
2788 | } | |
1da177e4 LT |
2789 | virtualdmabug_workaround(); |
2790 | return 2; | |
2791 | } | |
2792 | } | |
2793 | ||
2794 | if (CT(COMMAND) == FD_READ) | |
2795 | max_size = max_sector; /* unbounded */ | |
2796 | ||
2797 | /* claim buffer track if needed */ | |
2798 | if (buffer_track != raw_cmd->track || /* bad track */ | |
2799 | buffer_drive != current_drive || /* bad drive */ | |
2800 | fsector_t > buffer_max || | |
2801 | fsector_t < buffer_min || | |
2802 | ((CT(COMMAND) == FD_READ || | |
2803 | (!in_sector_offset && current_req->nr_sectors >= ssize)) && | |
2804 | max_sector > 2 * max_buffer_sectors + buffer_min && | |
2805 | max_size + fsector_t > 2 * max_buffer_sectors + buffer_min) | |
2806 | /* not enough space */ | |
2807 | ) { | |
2808 | buffer_track = -1; | |
2809 | buffer_drive = current_drive; | |
2810 | buffer_max = buffer_min = aligned_sector_t; | |
2811 | } | |
2812 | raw_cmd->kernel_data = floppy_track_buffer + | |
2813 | ((aligned_sector_t - buffer_min) << 9); | |
2814 | ||
2815 | if (CT(COMMAND) == FD_WRITE) { | |
2816 | /* copy write buffer to track buffer. | |
2817 | * if we get here, we know that the write | |
2818 | * is either aligned or the data already in the buffer | |
2819 | * (buffer will be overwritten) */ | |
2820 | #ifdef FLOPPY_SANITY_CHECK | |
2821 | if (in_sector_offset && buffer_track == -1) | |
2822 | DPRINT("internal error offset !=0 on write\n"); | |
2823 | #endif | |
2824 | buffer_track = raw_cmd->track; | |
2825 | buffer_drive = current_drive; | |
2826 | copy_buffer(ssize, max_sector, | |
2827 | 2 * max_buffer_sectors + buffer_min); | |
2828 | } else | |
2829 | transfer_size(ssize, max_sector, | |
2830 | 2 * max_buffer_sectors + buffer_min - | |
2831 | aligned_sector_t); | |
2832 | ||
2833 | /* round up current_count_sectors to get dma xfer size */ | |
2834 | raw_cmd->length = in_sector_offset + current_count_sectors; | |
2835 | raw_cmd->length = ((raw_cmd->length - 1) | (ssize - 1)) + 1; | |
2836 | raw_cmd->length <<= 9; | |
2837 | #ifdef FLOPPY_SANITY_CHECK | |
1da177e4 LT |
2838 | if ((raw_cmd->length < current_count_sectors << 9) || |
2839 | (raw_cmd->kernel_data != current_req->buffer && | |
2840 | CT(COMMAND) == FD_WRITE && | |
2841 | (aligned_sector_t + (raw_cmd->length >> 9) > buffer_max || | |
2842 | aligned_sector_t < buffer_min)) || | |
2843 | raw_cmd->length % (128 << SIZECODE) || | |
2844 | raw_cmd->length <= 0 || current_count_sectors <= 0) { | |
2845 | DPRINT("fractionary current count b=%lx s=%lx\n", | |
2846 | raw_cmd->length, current_count_sectors); | |
2847 | if (raw_cmd->kernel_data != current_req->buffer) | |
2848 | printk("addr=%d, length=%ld\n", | |
2849 | (int)((raw_cmd->kernel_data - | |
2850 | floppy_track_buffer) >> 9), | |
2851 | current_count_sectors); | |
2852 | printk("st=%d ast=%d mse=%d msi=%d\n", | |
2853 | fsector_t, aligned_sector_t, max_sector, max_size); | |
2854 | printk("ssize=%x SIZECODE=%d\n", ssize, SIZECODE); | |
2855 | printk("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n", | |
2856 | COMMAND, SECTOR, HEAD, TRACK); | |
2857 | printk("buffer drive=%d\n", buffer_drive); | |
2858 | printk("buffer track=%d\n", buffer_track); | |
2859 | printk("buffer_min=%d\n", buffer_min); | |
2860 | printk("buffer_max=%d\n", buffer_max); | |
2861 | return 0; | |
2862 | } | |
2863 | ||
2864 | if (raw_cmd->kernel_data != current_req->buffer) { | |
2865 | if (raw_cmd->kernel_data < floppy_track_buffer || | |
2866 | current_count_sectors < 0 || | |
2867 | raw_cmd->length < 0 || | |
2868 | raw_cmd->kernel_data + raw_cmd->length > | |
2869 | floppy_track_buffer + (max_buffer_sectors << 10)) { | |
2870 | DPRINT("buffer overrun in schedule dma\n"); | |
2871 | printk("fsector_t=%d buffer_min=%d current_count=%ld\n", | |
2872 | fsector_t, buffer_min, raw_cmd->length >> 9); | |
2873 | printk("current_count_sectors=%ld\n", | |
2874 | current_count_sectors); | |
2875 | if (CT(COMMAND) == FD_READ) | |
2876 | printk("read\n"); | |
2877 | if (CT(COMMAND) == FD_WRITE) | |
2878 | printk("write\n"); | |
2879 | return 0; | |
2880 | } | |
2881 | } else if (raw_cmd->length > current_req->nr_sectors << 9 || | |
2882 | current_count_sectors > current_req->nr_sectors) { | |
2883 | DPRINT("buffer overrun in direct transfer\n"); | |
2884 | return 0; | |
2885 | } else if (raw_cmd->length < current_count_sectors << 9) { | |
2886 | DPRINT("more sectors than bytes\n"); | |
2887 | printk("bytes=%ld\n", raw_cmd->length >> 9); | |
2888 | printk("sectors=%ld\n", current_count_sectors); | |
2889 | } | |
2890 | if (raw_cmd->length == 0) { | |
2891 | DPRINT("zero dma transfer attempted from make_raw_request\n"); | |
2892 | return 0; | |
2893 | } | |
2894 | #endif | |
2895 | ||
2896 | virtualdmabug_workaround(); | |
2897 | return 2; | |
2898 | } | |
2899 | ||
2900 | static void redo_fd_request(void) | |
2901 | { | |
2902 | #define REPEAT {request_done(0); continue; } | |
2903 | int drive; | |
2904 | int tmp; | |
2905 | ||
2906 | lastredo = jiffies; | |
2907 | if (current_drive < N_DRIVE) | |
2908 | floppy_off(current_drive); | |
2909 | ||
2910 | for (;;) { | |
2911 | if (!current_req) { | |
2912 | struct request *req; | |
2913 | ||
2914 | spin_lock_irq(floppy_queue->queue_lock); | |
2915 | req = elv_next_request(floppy_queue); | |
2916 | spin_unlock_irq(floppy_queue->queue_lock); | |
2917 | if (!req) { | |
2918 | do_floppy = NULL; | |
2919 | unlock_fdc(); | |
2920 | return; | |
2921 | } | |
2922 | current_req = req; | |
2923 | } | |
2924 | drive = (long)current_req->rq_disk->private_data; | |
2925 | set_fdc(drive); | |
2926 | reschedule_timeout(current_reqD, "redo fd request", 0); | |
2927 | ||
2928 | set_floppy(drive); | |
2929 | raw_cmd = &default_raw_cmd; | |
2930 | raw_cmd->flags = 0; | |
2931 | if (start_motor(redo_fd_request)) | |
2932 | return; | |
2933 | disk_change(current_drive); | |
2934 | if (test_bit(current_drive, &fake_change) || | |
2935 | TESTF(FD_DISK_CHANGED)) { | |
2936 | DPRINT("disk absent or changed during operation\n"); | |
2937 | REPEAT; | |
2938 | } | |
2939 | if (!_floppy) { /* Autodetection */ | |
2940 | if (!probing) { | |
2941 | DRS->probed_format = 0; | |
2942 | if (next_valid_format()) { | |
2943 | DPRINT("no autodetectable formats\n"); | |
2944 | _floppy = NULL; | |
2945 | REPEAT; | |
2946 | } | |
2947 | } | |
2948 | probing = 1; | |
2949 | _floppy = | |
2950 | floppy_type + DP->autodetect[DRS->probed_format]; | |
2951 | } else | |
2952 | probing = 0; | |
2953 | errors = &(current_req->errors); | |
2954 | tmp = make_raw_rw_request(); | |
2955 | if (tmp < 2) { | |
2956 | request_done(tmp); | |
2957 | continue; | |
2958 | } | |
2959 | ||
2960 | if (TESTF(FD_NEED_TWADDLE)) | |
2961 | twaddle(); | |
2962 | schedule_bh(floppy_start); | |
2963 | debugt("queue fd request"); | |
2964 | return; | |
2965 | } | |
2966 | #undef REPEAT | |
2967 | } | |
2968 | ||
2969 | static struct cont_t rw_cont = { | |
2970 | .interrupt = rw_interrupt, | |
2971 | .redo = redo_fd_request, | |
2972 | .error = bad_flp_intr, | |
2973 | .done = request_done | |
2974 | }; | |
2975 | ||
2976 | static void process_fd_request(void) | |
2977 | { | |
2978 | cont = &rw_cont; | |
2979 | schedule_bh(redo_fd_request); | |
2980 | } | |
2981 | ||
165125e1 | 2982 | static void do_fd_request(struct request_queue * q) |
1da177e4 LT |
2983 | { |
2984 | if (max_buffer_sectors == 0) { | |
2985 | printk("VFS: do_fd_request called on non-open device\n"); | |
2986 | return; | |
2987 | } | |
2988 | ||
2989 | if (usage_count == 0) { | |
2990 | printk("warning: usage count=0, current_req=%p exiting\n", | |
2991 | current_req); | |
4aff5e23 JA |
2992 | printk("sect=%ld type=%x flags=%x\n", (long)current_req->sector, |
2993 | current_req->cmd_type, current_req->cmd_flags); | |
1da177e4 LT |
2994 | return; |
2995 | } | |
2996 | if (test_bit(0, &fdc_busy)) { | |
2997 | /* fdc busy, this new request will be treated when the | |
2998 | current one is done */ | |
2999 | is_alive("do fd request, old request running"); | |
3000 | return; | |
3001 | } | |
3002 | lock_fdc(MAXTIMEOUT, 0); | |
3003 | process_fd_request(); | |
3004 | is_alive("do fd request"); | |
3005 | } | |
3006 | ||
3007 | static struct cont_t poll_cont = { | |
3008 | .interrupt = success_and_wakeup, | |
3009 | .redo = floppy_ready, | |
3010 | .error = generic_failure, | |
3011 | .done = generic_done | |
3012 | }; | |
3013 | ||
3014 | static int poll_drive(int interruptible, int flag) | |
3015 | { | |
3016 | int ret; | |
06f748c4 | 3017 | |
1da177e4 LT |
3018 | /* no auto-sense, just clear dcl */ |
3019 | raw_cmd = &default_raw_cmd; | |
3020 | raw_cmd->flags = flag; | |
3021 | raw_cmd->track = 0; | |
3022 | raw_cmd->cmd_count = 0; | |
3023 | cont = &poll_cont; | |
3024 | #ifdef DCL_DEBUG | |
3025 | if (DP->flags & FD_DEBUG) { | |
3026 | DPRINT("setting NEWCHANGE in poll_drive\n"); | |
3027 | } | |
3028 | #endif | |
3029 | SETF(FD_DISK_NEWCHANGE); | |
3030 | WAIT(floppy_ready); | |
3031 | return ret; | |
3032 | } | |
3033 | ||
3034 | /* | |
3035 | * User triggered reset | |
3036 | * ==================== | |
3037 | */ | |
3038 | ||
3039 | static void reset_intr(void) | |
3040 | { | |
3041 | printk("weird, reset interrupt called\n"); | |
3042 | } | |
3043 | ||
3044 | static struct cont_t reset_cont = { | |
3045 | .interrupt = reset_intr, | |
3046 | .redo = success_and_wakeup, | |
3047 | .error = generic_failure, | |
3048 | .done = generic_done | |
3049 | }; | |
3050 | ||
3051 | static int user_reset_fdc(int drive, int arg, int interruptible) | |
3052 | { | |
3053 | int ret; | |
3054 | ||
3055 | ret = 0; | |
3056 | LOCK_FDC(drive, interruptible); | |
3057 | if (arg == FD_RESET_ALWAYS) | |
3058 | FDCS->reset = 1; | |
3059 | if (FDCS->reset) { | |
3060 | cont = &reset_cont; | |
3061 | WAIT(reset_fdc); | |
3062 | } | |
3063 | process_fd_request(); | |
3064 | return ret; | |
3065 | } | |
3066 | ||
3067 | /* | |
3068 | * Misc Ioctl's and support | |
3069 | * ======================== | |
3070 | */ | |
3071 | static inline int fd_copyout(void __user *param, const void *address, | |
3072 | unsigned long size) | |
3073 | { | |
3074 | return copy_to_user(param, address, size) ? -EFAULT : 0; | |
3075 | } | |
3076 | ||
3077 | static inline int fd_copyin(void __user *param, void *address, unsigned long size) | |
3078 | { | |
3079 | return copy_from_user(address, param, size) ? -EFAULT : 0; | |
3080 | } | |
3081 | ||
3082 | #define _COPYOUT(x) (copy_to_user((void __user *)param, &(x), sizeof(x)) ? -EFAULT : 0) | |
3083 | #define _COPYIN(x) (copy_from_user(&(x), (void __user *)param, sizeof(x)) ? -EFAULT : 0) | |
3084 | ||
3085 | #define COPYOUT(x) ECALL(_COPYOUT(x)) | |
3086 | #define COPYIN(x) ECALL(_COPYIN(x)) | |
3087 | ||
3088 | static inline const char *drive_name(int type, int drive) | |
3089 | { | |
3090 | struct floppy_struct *floppy; | |
3091 | ||
3092 | if (type) | |
3093 | floppy = floppy_type + type; | |
3094 | else { | |
3095 | if (UDP->native_format) | |
3096 | floppy = floppy_type + UDP->native_format; | |
3097 | else | |
3098 | return "(null)"; | |
3099 | } | |
3100 | if (floppy->name) | |
3101 | return floppy->name; | |
3102 | else | |
3103 | return "(null)"; | |
3104 | } | |
3105 | ||
3106 | /* raw commands */ | |
3107 | static void raw_cmd_done(int flag) | |
3108 | { | |
3109 | int i; | |
3110 | ||
3111 | if (!flag) { | |
3112 | raw_cmd->flags |= FD_RAW_FAILURE; | |
3113 | raw_cmd->flags |= FD_RAW_HARDFAILURE; | |
3114 | } else { | |
3115 | raw_cmd->reply_count = inr; | |
3116 | if (raw_cmd->reply_count > MAX_REPLIES) | |
3117 | raw_cmd->reply_count = 0; | |
3118 | for (i = 0; i < raw_cmd->reply_count; i++) | |
3119 | raw_cmd->reply[i] = reply_buffer[i]; | |
3120 | ||
3121 | if (raw_cmd->flags & (FD_RAW_READ | FD_RAW_WRITE)) { | |
3122 | unsigned long flags; | |
3123 | flags = claim_dma_lock(); | |
3124 | raw_cmd->length = fd_get_dma_residue(); | |
3125 | release_dma_lock(flags); | |
3126 | } | |
3127 | ||
3128 | if ((raw_cmd->flags & FD_RAW_SOFTFAILURE) && | |
3129 | (!raw_cmd->reply_count || (raw_cmd->reply[0] & 0xc0))) | |
3130 | raw_cmd->flags |= FD_RAW_FAILURE; | |
3131 | ||
3132 | if (disk_change(current_drive)) | |
3133 | raw_cmd->flags |= FD_RAW_DISK_CHANGE; | |
3134 | else | |
3135 | raw_cmd->flags &= ~FD_RAW_DISK_CHANGE; | |
3136 | if (raw_cmd->flags & FD_RAW_NO_MOTOR_AFTER) | |
3137 | motor_off_callback(current_drive); | |
3138 | ||
3139 | if (raw_cmd->next && | |
3140 | (!(raw_cmd->flags & FD_RAW_FAILURE) || | |
3141 | !(raw_cmd->flags & FD_RAW_STOP_IF_FAILURE)) && | |
3142 | ((raw_cmd->flags & FD_RAW_FAILURE) || | |
3143 | !(raw_cmd->flags & FD_RAW_STOP_IF_SUCCESS))) { | |
3144 | raw_cmd = raw_cmd->next; | |
3145 | return; | |
3146 | } | |
3147 | } | |
3148 | generic_done(flag); | |
3149 | } | |
3150 | ||
3151 | static struct cont_t raw_cmd_cont = { | |
3152 | .interrupt = success_and_wakeup, | |
3153 | .redo = floppy_start, | |
3154 | .error = generic_failure, | |
3155 | .done = raw_cmd_done | |
3156 | }; | |
3157 | ||
3158 | static inline int raw_cmd_copyout(int cmd, char __user *param, | |
3159 | struct floppy_raw_cmd *ptr) | |
3160 | { | |
3161 | int ret; | |
3162 | ||
3163 | while (ptr) { | |
3164 | COPYOUT(*ptr); | |
3165 | param += sizeof(struct floppy_raw_cmd); | |
3166 | if ((ptr->flags & FD_RAW_READ) && ptr->buffer_length) { | |
3167 | if (ptr->length >= 0 | |
3168 | && ptr->length <= ptr->buffer_length) | |
3169 | ECALL(fd_copyout | |
3170 | (ptr->data, ptr->kernel_data, | |
3171 | ptr->buffer_length - ptr->length)); | |
3172 | } | |
3173 | ptr = ptr->next; | |
3174 | } | |
3175 | return 0; | |
3176 | } | |
3177 | ||
3178 | static void raw_cmd_free(struct floppy_raw_cmd **ptr) | |
3179 | { | |
06f748c4 JJ |
3180 | struct floppy_raw_cmd *next; |
3181 | struct floppy_raw_cmd *this; | |
1da177e4 LT |
3182 | |
3183 | this = *ptr; | |
3184 | *ptr = NULL; | |
3185 | while (this) { | |
3186 | if (this->buffer_length) { | |
3187 | fd_dma_mem_free((unsigned long)this->kernel_data, | |
3188 | this->buffer_length); | |
3189 | this->buffer_length = 0; | |
3190 | } | |
3191 | next = this->next; | |
3192 | kfree(this); | |
3193 | this = next; | |
3194 | } | |
3195 | } | |
3196 | ||
3197 | static inline int raw_cmd_copyin(int cmd, char __user *param, | |
3198 | struct floppy_raw_cmd **rcmd) | |
3199 | { | |
3200 | struct floppy_raw_cmd *ptr; | |
3201 | int ret; | |
3202 | int i; | |
3203 | ||
3204 | *rcmd = NULL; | |
3205 | while (1) { | |
3206 | ptr = (struct floppy_raw_cmd *) | |
3207 | kmalloc(sizeof(struct floppy_raw_cmd), GFP_USER); | |
3208 | if (!ptr) | |
3209 | return -ENOMEM; | |
3210 | *rcmd = ptr; | |
3211 | COPYIN(*ptr); | |
3212 | ptr->next = NULL; | |
3213 | ptr->buffer_length = 0; | |
3214 | param += sizeof(struct floppy_raw_cmd); | |
3215 | if (ptr->cmd_count > 33) | |
3216 | /* the command may now also take up the space | |
3217 | * initially intended for the reply & the | |
3218 | * reply count. Needed for long 82078 commands | |
3219 | * such as RESTORE, which takes ... 17 command | |
3220 | * bytes. Murphy's law #137: When you reserve | |
3221 | * 16 bytes for a structure, you'll one day | |
3222 | * discover that you really need 17... | |
3223 | */ | |
3224 | return -EINVAL; | |
3225 | ||
3226 | for (i = 0; i < 16; i++) | |
3227 | ptr->reply[i] = 0; | |
3228 | ptr->resultcode = 0; | |
3229 | ptr->kernel_data = NULL; | |
3230 | ||
3231 | if (ptr->flags & (FD_RAW_READ | FD_RAW_WRITE)) { | |
3232 | if (ptr->length <= 0) | |
3233 | return -EINVAL; | |
3234 | ptr->kernel_data = | |
3235 | (char *)fd_dma_mem_alloc(ptr->length); | |
3236 | fallback_on_nodma_alloc(&ptr->kernel_data, ptr->length); | |
3237 | if (!ptr->kernel_data) | |
3238 | return -ENOMEM; | |
3239 | ptr->buffer_length = ptr->length; | |
3240 | } | |
3241 | if (ptr->flags & FD_RAW_WRITE) | |
3242 | ECALL(fd_copyin(ptr->data, ptr->kernel_data, | |
3243 | ptr->length)); | |
3244 | rcmd = &(ptr->next); | |
3245 | if (!(ptr->flags & FD_RAW_MORE)) | |
3246 | return 0; | |
3247 | ptr->rate &= 0x43; | |
3248 | } | |
3249 | } | |
3250 | ||
3251 | static int raw_cmd_ioctl(int cmd, void __user *param) | |
3252 | { | |
1da177e4 | 3253 | struct floppy_raw_cmd *my_raw_cmd; |
06f748c4 JJ |
3254 | int drive; |
3255 | int ret2; | |
3256 | int ret; | |
1da177e4 LT |
3257 | |
3258 | if (FDCS->rawcmd <= 1) | |
3259 | FDCS->rawcmd = 1; | |
3260 | for (drive = 0; drive < N_DRIVE; drive++) { | |
3261 | if (FDC(drive) != fdc) | |
3262 | continue; | |
3263 | if (drive == current_drive) { | |
3264 | if (UDRS->fd_ref > 1) { | |
3265 | FDCS->rawcmd = 2; | |
3266 | break; | |
3267 | } | |
3268 | } else if (UDRS->fd_ref) { | |
3269 | FDCS->rawcmd = 2; | |
3270 | break; | |
3271 | } | |
3272 | } | |
3273 | ||
3274 | if (FDCS->reset) | |
3275 | return -EIO; | |
3276 | ||
3277 | ret = raw_cmd_copyin(cmd, param, &my_raw_cmd); | |
3278 | if (ret) { | |
3279 | raw_cmd_free(&my_raw_cmd); | |
3280 | return ret; | |
3281 | } | |
3282 | ||
3283 | raw_cmd = my_raw_cmd; | |
3284 | cont = &raw_cmd_cont; | |
3285 | ret = wait_til_done(floppy_start, 1); | |
3286 | #ifdef DCL_DEBUG | |
3287 | if (DP->flags & FD_DEBUG) { | |
3288 | DPRINT("calling disk change from raw_cmd ioctl\n"); | |
3289 | } | |
3290 | #endif | |
3291 | ||
3292 | if (ret != -EINTR && FDCS->reset) | |
3293 | ret = -EIO; | |
3294 | ||
3295 | DRS->track = NO_TRACK; | |
3296 | ||
3297 | ret2 = raw_cmd_copyout(cmd, param, my_raw_cmd); | |
3298 | if (!ret) | |
3299 | ret = ret2; | |
3300 | raw_cmd_free(&my_raw_cmd); | |
3301 | return ret; | |
3302 | } | |
3303 | ||
3304 | static int invalidate_drive(struct block_device *bdev) | |
3305 | { | |
3306 | /* invalidate the buffer track to force a reread */ | |
3307 | set_bit((long)bdev->bd_disk->private_data, &fake_change); | |
3308 | process_fd_request(); | |
3309 | check_disk_change(bdev); | |
3310 | return 0; | |
3311 | } | |
3312 | ||
3313 | static inline int set_geometry(unsigned int cmd, struct floppy_struct *g, | |
3314 | int drive, int type, struct block_device *bdev) | |
3315 | { | |
3316 | int cnt; | |
3317 | ||
3318 | /* sanity checking for parameters. */ | |
3319 | if (g->sect <= 0 || | |
3320 | g->head <= 0 || | |
3321 | g->track <= 0 || g->track > UDP->tracks >> STRETCH(g) || | |
3322 | /* check if reserved bits are set */ | |
9e49184c | 3323 | (g->stretch & ~(FD_STRETCH | FD_SWAPSIDES | FD_SECTBASEMASK)) != 0) |
1da177e4 LT |
3324 | return -EINVAL; |
3325 | if (type) { | |
3326 | if (!capable(CAP_SYS_ADMIN)) | |
3327 | return -EPERM; | |
b1c82b5c | 3328 | mutex_lock(&open_lock); |
1da177e4 LT |
3329 | LOCK_FDC(drive, 1); |
3330 | floppy_type[type] = *g; | |
3331 | floppy_type[type].name = "user format"; | |
3332 | for (cnt = type << 2; cnt < (type << 2) + 4; cnt++) | |
3333 | floppy_sizes[cnt] = floppy_sizes[cnt + 0x80] = | |
3334 | floppy_type[type].size + 1; | |
3335 | process_fd_request(); | |
3336 | for (cnt = 0; cnt < N_DRIVE; cnt++) { | |
3337 | struct block_device *bdev = opened_bdev[cnt]; | |
3338 | if (!bdev || ITYPE(drive_state[cnt].fd_device) != type) | |
3339 | continue; | |
2ef41634 | 3340 | __invalidate_device(bdev); |
1da177e4 | 3341 | } |
b1c82b5c | 3342 | mutex_unlock(&open_lock); |
1da177e4 LT |
3343 | } else { |
3344 | int oldStretch; | |
3345 | LOCK_FDC(drive, 1); | |
3346 | if (cmd != FDDEFPRM) | |
3347 | /* notice a disk change immediately, else | |
3348 | * we lose our settings immediately*/ | |
3349 | CALL(poll_drive(1, FD_RAW_NEED_DISK)); | |
3350 | oldStretch = g->stretch; | |
3351 | user_params[drive] = *g; | |
3352 | if (buffer_drive == drive) | |
3353 | SUPBOUND(buffer_max, user_params[drive].sect); | |
3354 | current_type[drive] = &user_params[drive]; | |
3355 | floppy_sizes[drive] = user_params[drive].size; | |
3356 | if (cmd == FDDEFPRM) | |
3357 | DRS->keep_data = -1; | |
3358 | else | |
3359 | DRS->keep_data = 1; | |
3360 | /* invalidation. Invalidate only when needed, i.e. | |
3361 | * when there are already sectors in the buffer cache | |
3362 | * whose number will change. This is useful, because | |
3363 | * mtools often changes the geometry of the disk after | |
3364 | * looking at the boot block */ | |
3365 | if (DRS->maxblock > user_params[drive].sect || | |
3366 | DRS->maxtrack || | |
3367 | ((user_params[drive].sect ^ oldStretch) & | |
9e49184c | 3368 | (FD_SWAPSIDES | FD_SECTBASEMASK))) |
1da177e4 LT |
3369 | invalidate_drive(bdev); |
3370 | else | |
3371 | process_fd_request(); | |
3372 | } | |
3373 | return 0; | |
3374 | } | |
3375 | ||
3376 | /* handle obsolete ioctl's */ | |
3377 | static int ioctl_table[] = { | |
3378 | FDCLRPRM, | |
3379 | FDSETPRM, | |
3380 | FDDEFPRM, | |
3381 | FDGETPRM, | |
3382 | FDMSGON, | |
3383 | FDMSGOFF, | |
3384 | FDFMTBEG, | |
3385 | FDFMTTRK, | |
3386 | FDFMTEND, | |
3387 | FDSETEMSGTRESH, | |
3388 | FDFLUSH, | |
3389 | FDSETMAXERRS, | |
3390 | FDGETMAXERRS, | |
3391 | FDGETDRVTYP, | |
3392 | FDSETDRVPRM, | |
3393 | FDGETDRVPRM, | |
3394 | FDGETDRVSTAT, | |
3395 | FDPOLLDRVSTAT, | |
3396 | FDRESET, | |
3397 | FDGETFDCSTAT, | |
3398 | FDWERRORCLR, | |
3399 | FDWERRORGET, | |
3400 | FDRAWCMD, | |
3401 | FDEJECT, | |
3402 | FDTWADDLE | |
3403 | }; | |
3404 | ||
3405 | static inline int normalize_ioctl(int *cmd, int *size) | |
3406 | { | |
3407 | int i; | |
3408 | ||
3409 | for (i = 0; i < ARRAY_SIZE(ioctl_table); i++) { | |
3410 | if ((*cmd & 0xffff) == (ioctl_table[i] & 0xffff)) { | |
3411 | *size = _IOC_SIZE(*cmd); | |
3412 | *cmd = ioctl_table[i]; | |
3413 | if (*size > _IOC_SIZE(*cmd)) { | |
3414 | printk("ioctl not yet supported\n"); | |
3415 | return -EFAULT; | |
3416 | } | |
3417 | return 0; | |
3418 | } | |
3419 | } | |
3420 | return -EINVAL; | |
3421 | } | |
3422 | ||
3423 | static int get_floppy_geometry(int drive, int type, struct floppy_struct **g) | |
3424 | { | |
3425 | if (type) | |
3426 | *g = &floppy_type[type]; | |
3427 | else { | |
3428 | LOCK_FDC(drive, 0); | |
3429 | CALL(poll_drive(0, 0)); | |
3430 | process_fd_request(); | |
3431 | *g = current_type[drive]; | |
3432 | } | |
3433 | if (!*g) | |
3434 | return -ENODEV; | |
3435 | return 0; | |
3436 | } | |
3437 | ||
a885c8c4 CH |
3438 | static int fd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
3439 | { | |
3440 | int drive = (long)bdev->bd_disk->private_data; | |
3441 | int type = ITYPE(drive_state[drive].fd_device); | |
3442 | struct floppy_struct *g; | |
3443 | int ret; | |
3444 | ||
3445 | ret = get_floppy_geometry(drive, type, &g); | |
3446 | if (ret) | |
3447 | return ret; | |
3448 | ||
3449 | geo->heads = g->head; | |
3450 | geo->sectors = g->sect; | |
3451 | geo->cylinders = g->track; | |
3452 | return 0; | |
3453 | } | |
3454 | ||
a4af9b48 | 3455 | static int fd_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, |
1da177e4 LT |
3456 | unsigned long param) |
3457 | { | |
a4af9b48 | 3458 | #define FD_IOCTL_ALLOWED (mode & (FMODE_WRITE|FMODE_WRITE_IOCTL)) |
1da177e4 LT |
3459 | #define OUT(c,x) case c: outparam = (const char *) (x); break |
3460 | #define IN(c,x,tag) case c: *(x) = inparam. tag ; return 0 | |
3461 | ||
a4af9b48 | 3462 | int drive = (long)bdev->bd_disk->private_data; |
06f748c4 JJ |
3463 | int type = ITYPE(UDRS->fd_device); |
3464 | int i; | |
1da177e4 LT |
3465 | int ret; |
3466 | int size; | |
3467 | union inparam { | |
3468 | struct floppy_struct g; /* geometry */ | |
3469 | struct format_descr f; | |
3470 | struct floppy_max_errors max_errors; | |
3471 | struct floppy_drive_params dp; | |
3472 | } inparam; /* parameters coming from user space */ | |
3473 | const char *outparam; /* parameters passed back to user space */ | |
3474 | ||
3475 | /* convert compatibility eject ioctls into floppy eject ioctl. | |
3476 | * We do this in order to provide a means to eject floppy disks before | |
3477 | * installing the new fdutils package */ | |
3478 | if (cmd == CDROMEJECT || /* CD-ROM eject */ | |
3479 | cmd == 0x6470 /* SunOS floppy eject */ ) { | |
3480 | DPRINT("obsolete eject ioctl\n"); | |
3481 | DPRINT("please use floppycontrol --eject\n"); | |
3482 | cmd = FDEJECT; | |
3483 | } | |
3484 | ||
1da177e4 LT |
3485 | /* convert the old style command into a new style command */ |
3486 | if ((cmd & 0xff00) == 0x0200) { | |
3487 | ECALL(normalize_ioctl(&cmd, &size)); | |
3488 | } else | |
3489 | return -EINVAL; | |
3490 | ||
3491 | /* permission checks */ | |
3492 | if (((cmd & 0x40) && !FD_IOCTL_ALLOWED) || | |
3493 | ((cmd & 0x80) && !capable(CAP_SYS_ADMIN))) | |
3494 | return -EPERM; | |
3495 | ||
3496 | /* copyin */ | |
3497 | CLEARSTRUCT(&inparam); | |
3498 | if (_IOC_DIR(cmd) & _IOC_WRITE) | |
3499 | ECALL(fd_copyin((void __user *)param, &inparam, size)) | |
3500 | ||
3501 | switch (cmd) { | |
3502 | case FDEJECT: | |
3503 | if (UDRS->fd_ref != 1) | |
3504 | /* somebody else has this drive open */ | |
3505 | return -EBUSY; | |
3506 | LOCK_FDC(drive, 1); | |
3507 | ||
3508 | /* do the actual eject. Fails on | |
3509 | * non-Sparc architectures */ | |
3510 | ret = fd_eject(UNIT(drive)); | |
3511 | ||
3512 | USETF(FD_DISK_CHANGED); | |
3513 | USETF(FD_VERIFY); | |
3514 | process_fd_request(); | |
3515 | return ret; | |
3516 | case FDCLRPRM: | |
3517 | LOCK_FDC(drive, 1); | |
3518 | current_type[drive] = NULL; | |
3519 | floppy_sizes[drive] = MAX_DISK_SIZE << 1; | |
3520 | UDRS->keep_data = 0; | |
a4af9b48 | 3521 | return invalidate_drive(bdev); |
1da177e4 LT |
3522 | case FDSETPRM: |
3523 | case FDDEFPRM: | |
3524 | return set_geometry(cmd, &inparam.g, | |
a4af9b48 | 3525 | drive, type, bdev); |
1da177e4 LT |
3526 | case FDGETPRM: |
3527 | ECALL(get_floppy_geometry(drive, type, | |
3528 | (struct floppy_struct **) | |
3529 | &outparam)); | |
3530 | break; | |
3531 | ||
3532 | case FDMSGON: | |
3533 | UDP->flags |= FTD_MSG; | |
3534 | return 0; | |
3535 | case FDMSGOFF: | |
3536 | UDP->flags &= ~FTD_MSG; | |
3537 | return 0; | |
3538 | ||
3539 | case FDFMTBEG: | |
3540 | LOCK_FDC(drive, 1); | |
3541 | CALL(poll_drive(1, FD_RAW_NEED_DISK)); | |
3542 | ret = UDRS->flags; | |
3543 | process_fd_request(); | |
3544 | if (ret & FD_VERIFY) | |
3545 | return -ENODEV; | |
3546 | if (!(ret & FD_DISK_WRITABLE)) | |
3547 | return -EROFS; | |
3548 | return 0; | |
3549 | case FDFMTTRK: | |
3550 | if (UDRS->fd_ref != 1) | |
3551 | return -EBUSY; | |
3552 | return do_format(drive, &inparam.f); | |
3553 | case FDFMTEND: | |
3554 | case FDFLUSH: | |
3555 | LOCK_FDC(drive, 1); | |
a4af9b48 | 3556 | return invalidate_drive(bdev); |
1da177e4 LT |
3557 | |
3558 | case FDSETEMSGTRESH: | |
3559 | UDP->max_errors.reporting = | |
3560 | (unsigned short)(param & 0x0f); | |
3561 | return 0; | |
3562 | OUT(FDGETMAXERRS, &UDP->max_errors); | |
3563 | IN(FDSETMAXERRS, &UDP->max_errors, max_errors); | |
3564 | ||
3565 | case FDGETDRVTYP: | |
3566 | outparam = drive_name(type, drive); | |
3567 | SUPBOUND(size, strlen(outparam) + 1); | |
3568 | break; | |
3569 | ||
3570 | IN(FDSETDRVPRM, UDP, dp); | |
3571 | OUT(FDGETDRVPRM, UDP); | |
3572 | ||
3573 | case FDPOLLDRVSTAT: | |
3574 | LOCK_FDC(drive, 1); | |
3575 | CALL(poll_drive(1, FD_RAW_NEED_DISK)); | |
3576 | process_fd_request(); | |
3577 | /* fall through */ | |
3578 | OUT(FDGETDRVSTAT, UDRS); | |
3579 | ||
3580 | case FDRESET: | |
3581 | return user_reset_fdc(drive, (int)param, 1); | |
3582 | ||
3583 | OUT(FDGETFDCSTAT, UFDCS); | |
3584 | ||
3585 | case FDWERRORCLR: | |
3586 | CLEARSTRUCT(UDRWE); | |
3587 | return 0; | |
3588 | OUT(FDWERRORGET, UDRWE); | |
3589 | ||
3590 | case FDRAWCMD: | |
3591 | if (type) | |
3592 | return -EINVAL; | |
3593 | LOCK_FDC(drive, 1); | |
3594 | set_floppy(drive); | |
3595 | CALL(i = raw_cmd_ioctl(cmd, (void __user *)param)); | |
3596 | process_fd_request(); | |
3597 | return i; | |
3598 | ||
3599 | case FDTWADDLE: | |
3600 | LOCK_FDC(drive, 1); | |
3601 | twaddle(); | |
3602 | process_fd_request(); | |
3603 | return 0; | |
3604 | ||
3605 | default: | |
3606 | return -EINVAL; | |
3607 | } | |
3608 | ||
3609 | if (_IOC_DIR(cmd) & _IOC_READ) | |
3610 | return fd_copyout((void __user *)param, outparam, size); | |
3611 | else | |
3612 | return 0; | |
3613 | #undef OUT | |
3614 | #undef IN | |
3615 | } | |
3616 | ||
3617 | static void __init config_types(void) | |
3618 | { | |
3619 | int first = 1; | |
3620 | int drive; | |
3621 | ||
3622 | /* read drive info out of physical CMOS */ | |
3623 | drive = 0; | |
3624 | if (!UDP->cmos) | |
3625 | UDP->cmos = FLOPPY0_TYPE; | |
3626 | drive = 1; | |
3627 | if (!UDP->cmos && FLOPPY1_TYPE) | |
3628 | UDP->cmos = FLOPPY1_TYPE; | |
3629 | ||
06f748c4 | 3630 | /* FIXME: additional physical CMOS drive detection should go here */ |
1da177e4 LT |
3631 | |
3632 | for (drive = 0; drive < N_DRIVE; drive++) { | |
3633 | unsigned int type = UDP->cmos; | |
3634 | struct floppy_drive_params *params; | |
3635 | const char *name = NULL; | |
3636 | static char temparea[32]; | |
3637 | ||
945f390f | 3638 | if (type < ARRAY_SIZE(default_drive_params)) { |
1da177e4 LT |
3639 | params = &default_drive_params[type].params; |
3640 | if (type) { | |
3641 | name = default_drive_params[type].name; | |
3642 | allowed_drive_mask |= 1 << drive; | |
3643 | } else | |
3644 | allowed_drive_mask &= ~(1 << drive); | |
3645 | } else { | |
3646 | params = &default_drive_params[0].params; | |
3647 | sprintf(temparea, "unknown type %d (usb?)", type); | |
3648 | name = temparea; | |
3649 | } | |
3650 | if (name) { | |
3651 | const char *prepend = ","; | |
3652 | if (first) { | |
3653 | prepend = KERN_INFO "Floppy drive(s):"; | |
3654 | first = 0; | |
3655 | } | |
3656 | printk("%s fd%d is %s", prepend, drive, name); | |
1da177e4 LT |
3657 | } |
3658 | *UDP = *params; | |
3659 | } | |
3660 | if (!first) | |
3661 | printk("\n"); | |
3662 | } | |
3663 | ||
a4af9b48 | 3664 | static int floppy_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 3665 | { |
a4af9b48 | 3666 | int drive = (long)disk->private_data; |
1da177e4 | 3667 | |
b1c82b5c | 3668 | mutex_lock(&open_lock); |
1da177e4 LT |
3669 | if (UDRS->fd_ref < 0) |
3670 | UDRS->fd_ref = 0; | |
3671 | else if (!UDRS->fd_ref--) { | |
3672 | DPRINT("floppy_release with fd_ref == 0"); | |
3673 | UDRS->fd_ref = 0; | |
3674 | } | |
3675 | if (!UDRS->fd_ref) | |
3676 | opened_bdev[drive] = NULL; | |
b1c82b5c | 3677 | mutex_unlock(&open_lock); |
3e541a4a | 3678 | |
1da177e4 LT |
3679 | return 0; |
3680 | } | |
3681 | ||
3682 | /* | |
3683 | * floppy_open check for aliasing (/dev/fd0 can be the same as | |
3684 | * /dev/PS0 etc), and disallows simultaneous access to the same | |
3685 | * drive with different device numbers. | |
3686 | */ | |
a4af9b48 | 3687 | static int floppy_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 3688 | { |
a4af9b48 AV |
3689 | int drive = (long)bdev->bd_disk->private_data; |
3690 | int old_dev, new_dev; | |
1da177e4 LT |
3691 | int try; |
3692 | int res = -EBUSY; | |
3693 | char *tmp; | |
3694 | ||
b1c82b5c | 3695 | mutex_lock(&open_lock); |
1da177e4 | 3696 | old_dev = UDRS->fd_device; |
a4af9b48 | 3697 | if (opened_bdev[drive] && opened_bdev[drive] != bdev) |
1da177e4 LT |
3698 | goto out2; |
3699 | ||
3700 | if (!UDRS->fd_ref && (UDP->flags & FD_BROKEN_DCL)) { | |
3701 | USETF(FD_DISK_CHANGED); | |
3702 | USETF(FD_VERIFY); | |
3703 | } | |
3704 | ||
a4af9b48 | 3705 | if (UDRS->fd_ref == -1 || (UDRS->fd_ref && (mode & FMODE_EXCL))) |
1da177e4 LT |
3706 | goto out2; |
3707 | ||
a4af9b48 | 3708 | if (mode & FMODE_EXCL) |
1da177e4 LT |
3709 | UDRS->fd_ref = -1; |
3710 | else | |
3711 | UDRS->fd_ref++; | |
3712 | ||
a4af9b48 | 3713 | opened_bdev[drive] = bdev; |
1da177e4 LT |
3714 | |
3715 | res = -ENXIO; | |
3716 | ||
3717 | if (!floppy_track_buffer) { | |
3718 | /* if opening an ED drive, reserve a big buffer, | |
3719 | * else reserve a small one */ | |
3720 | if ((UDP->cmos == 6) || (UDP->cmos == 5)) | |
3721 | try = 64; /* Only 48 actually useful */ | |
3722 | else | |
3723 | try = 32; /* Only 24 actually useful */ | |
3724 | ||
3725 | tmp = (char *)fd_dma_mem_alloc(1024 * try); | |
3726 | if (!tmp && !floppy_track_buffer) { | |
3727 | try >>= 1; /* buffer only one side */ | |
3728 | INFBOUND(try, 16); | |
3729 | tmp = (char *)fd_dma_mem_alloc(1024 * try); | |
3730 | } | |
3731 | if (!tmp && !floppy_track_buffer) { | |
3732 | fallback_on_nodma_alloc(&tmp, 2048 * try); | |
3733 | } | |
3734 | if (!tmp && !floppy_track_buffer) { | |
3735 | DPRINT("Unable to allocate DMA memory\n"); | |
3736 | goto out; | |
3737 | } | |
3738 | if (floppy_track_buffer) { | |
3739 | if (tmp) | |
3740 | fd_dma_mem_free((unsigned long)tmp, try * 1024); | |
3741 | } else { | |
3742 | buffer_min = buffer_max = -1; | |
3743 | floppy_track_buffer = tmp; | |
3744 | max_buffer_sectors = try; | |
3745 | } | |
3746 | } | |
3747 | ||
a4af9b48 AV |
3748 | new_dev = MINOR(bdev->bd_dev); |
3749 | UDRS->fd_device = new_dev; | |
3750 | set_capacity(disks[drive], floppy_sizes[new_dev]); | |
3751 | if (old_dev != -1 && old_dev != new_dev) { | |
1da177e4 LT |
3752 | if (buffer_drive == drive) |
3753 | buffer_track = -1; | |
3754 | } | |
3755 | ||
1da177e4 LT |
3756 | if (UFDCS->rawcmd == 1) |
3757 | UFDCS->rawcmd = 2; | |
3758 | ||
a4af9b48 AV |
3759 | if (!(mode & FMODE_NDELAY)) { |
3760 | if (mode & (FMODE_READ|FMODE_WRITE)) { | |
1da177e4 | 3761 | UDRS->last_checked = 0; |
a4af9b48 | 3762 | check_disk_change(bdev); |
1da177e4 LT |
3763 | if (UTESTF(FD_DISK_CHANGED)) |
3764 | goto out; | |
3765 | } | |
3766 | res = -EROFS; | |
a4af9b48 | 3767 | if ((mode & FMODE_WRITE) && !(UTESTF(FD_DISK_WRITABLE))) |
1da177e4 LT |
3768 | goto out; |
3769 | } | |
b1c82b5c | 3770 | mutex_unlock(&open_lock); |
1da177e4 LT |
3771 | return 0; |
3772 | out: | |
3773 | if (UDRS->fd_ref < 0) | |
3774 | UDRS->fd_ref = 0; | |
3775 | else | |
3776 | UDRS->fd_ref--; | |
3777 | if (!UDRS->fd_ref) | |
3778 | opened_bdev[drive] = NULL; | |
1da177e4 | 3779 | out2: |
b1c82b5c | 3780 | mutex_unlock(&open_lock); |
1da177e4 LT |
3781 | return res; |
3782 | } | |
3783 | ||
3784 | /* | |
3785 | * Check if the disk has been changed or if a change has been faked. | |
3786 | */ | |
3787 | static int check_floppy_change(struct gendisk *disk) | |
3788 | { | |
3789 | int drive = (long)disk->private_data; | |
3790 | ||
3791 | if (UTESTF(FD_DISK_CHANGED) || UTESTF(FD_VERIFY)) | |
3792 | return 1; | |
3793 | ||
50297cbf | 3794 | if (time_after(jiffies, UDRS->last_checked + UDP->checkfreq)) { |
1da177e4 LT |
3795 | lock_fdc(drive, 0); |
3796 | poll_drive(0, 0); | |
3797 | process_fd_request(); | |
1da177e4 LT |
3798 | } |
3799 | ||
3800 | if (UTESTF(FD_DISK_CHANGED) || | |
3801 | UTESTF(FD_VERIFY) || | |
3802 | test_bit(drive, &fake_change) || | |
3803 | (!ITYPE(UDRS->fd_device) && !current_type[drive])) | |
3804 | return 1; | |
3805 | return 0; | |
3806 | } | |
3807 | ||
3808 | /* | |
3809 | * This implements "read block 0" for floppy_revalidate(). | |
3810 | * Needed for format autodetection, checking whether there is | |
3811 | * a disk in the drive, and whether that disk is writable. | |
3812 | */ | |
3813 | ||
6712ecf8 | 3814 | static void floppy_rb0_complete(struct bio *bio, |
1da177e4 LT |
3815 | int err) |
3816 | { | |
1da177e4 | 3817 | complete((struct completion *)bio->bi_private); |
1da177e4 LT |
3818 | } |
3819 | ||
3820 | static int __floppy_read_block_0(struct block_device *bdev) | |
3821 | { | |
3822 | struct bio bio; | |
3823 | struct bio_vec bio_vec; | |
3824 | struct completion complete; | |
3825 | struct page *page; | |
3826 | size_t size; | |
3827 | ||
3828 | page = alloc_page(GFP_NOIO); | |
3829 | if (!page) { | |
3830 | process_fd_request(); | |
3831 | return -ENOMEM; | |
3832 | } | |
3833 | ||
3834 | size = bdev->bd_block_size; | |
3835 | if (!size) | |
3836 | size = 1024; | |
3837 | ||
3838 | bio_init(&bio); | |
3839 | bio.bi_io_vec = &bio_vec; | |
3840 | bio_vec.bv_page = page; | |
3841 | bio_vec.bv_len = size; | |
3842 | bio_vec.bv_offset = 0; | |
3843 | bio.bi_vcnt = 1; | |
3844 | bio.bi_idx = 0; | |
3845 | bio.bi_size = size; | |
3846 | bio.bi_bdev = bdev; | |
3847 | bio.bi_sector = 0; | |
3848 | init_completion(&complete); | |
3849 | bio.bi_private = &complete; | |
3850 | bio.bi_end_io = floppy_rb0_complete; | |
3851 | ||
3852 | submit_bio(READ, &bio); | |
3853 | generic_unplug_device(bdev_get_queue(bdev)); | |
3854 | process_fd_request(); | |
3855 | wait_for_completion(&complete); | |
3856 | ||
3857 | __free_page(page); | |
3858 | ||
3859 | return 0; | |
3860 | } | |
3861 | ||
3862 | /* revalidate the floppy disk, i.e. trigger format autodetection by reading | |
3863 | * the bootblock (block 0). "Autodetection" is also needed to check whether | |
3864 | * there is a disk in the drive at all... Thus we also do it for fixed | |
3865 | * geometry formats */ | |
3866 | static int floppy_revalidate(struct gendisk *disk) | |
3867 | { | |
3868 | int drive = (long)disk->private_data; | |
3869 | #define NO_GEOM (!current_type[drive] && !ITYPE(UDRS->fd_device)) | |
3870 | int cf; | |
3871 | int res = 0; | |
3872 | ||
3873 | if (UTESTF(FD_DISK_CHANGED) || | |
3874 | UTESTF(FD_VERIFY) || test_bit(drive, &fake_change) || NO_GEOM) { | |
3875 | if (usage_count == 0) { | |
3876 | printk("VFS: revalidate called on non-open device.\n"); | |
3877 | return -EFAULT; | |
3878 | } | |
3879 | lock_fdc(drive, 0); | |
3880 | cf = UTESTF(FD_DISK_CHANGED) || UTESTF(FD_VERIFY); | |
3881 | if (!(cf || test_bit(drive, &fake_change) || NO_GEOM)) { | |
3882 | process_fd_request(); /*already done by another thread */ | |
3883 | return 0; | |
3884 | } | |
3885 | UDRS->maxblock = 0; | |
3886 | UDRS->maxtrack = 0; | |
3887 | if (buffer_drive == drive) | |
3888 | buffer_track = -1; | |
3889 | clear_bit(drive, &fake_change); | |
3890 | UCLEARF(FD_DISK_CHANGED); | |
3891 | if (cf) | |
3892 | UDRS->generation++; | |
3893 | if (NO_GEOM) { | |
3894 | /* auto-sensing */ | |
3895 | res = __floppy_read_block_0(opened_bdev[drive]); | |
3896 | } else { | |
3897 | if (cf) | |
3898 | poll_drive(0, FD_RAW_NEED_DISK); | |
3899 | process_fd_request(); | |
3900 | } | |
3901 | } | |
3902 | set_capacity(disk, floppy_sizes[UDRS->fd_device]); | |
3903 | return res; | |
3904 | } | |
3905 | ||
3906 | static struct block_device_operations floppy_fops = { | |
06f748c4 | 3907 | .owner = THIS_MODULE, |
a4af9b48 AV |
3908 | .open = floppy_open, |
3909 | .release = floppy_release, | |
3910 | .locked_ioctl = fd_ioctl, | |
06f748c4 JJ |
3911 | .getgeo = fd_getgeo, |
3912 | .media_changed = check_floppy_change, | |
3913 | .revalidate_disk = floppy_revalidate, | |
1da177e4 | 3914 | }; |
1da177e4 | 3915 | |
1da177e4 LT |
3916 | /* |
3917 | * Floppy Driver initialization | |
3918 | * ============================= | |
3919 | */ | |
3920 | ||
3921 | /* Determine the floppy disk controller type */ | |
3922 | /* This routine was written by David C. Niemi */ | |
3923 | static char __init get_fdc_version(void) | |
3924 | { | |
3925 | int r; | |
3926 | ||
3927 | output_byte(FD_DUMPREGS); /* 82072 and better know DUMPREGS */ | |
3928 | if (FDCS->reset) | |
3929 | return FDC_NONE; | |
3930 | if ((r = result()) <= 0x00) | |
3931 | return FDC_NONE; /* No FDC present ??? */ | |
3932 | if ((r == 1) && (reply_buffer[0] == 0x80)) { | |
3933 | printk(KERN_INFO "FDC %d is an 8272A\n", fdc); | |
3934 | return FDC_8272A; /* 8272a/765 don't know DUMPREGS */ | |
3935 | } | |
3936 | if (r != 10) { | |
3937 | printk | |
3938 | ("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n", | |
3939 | fdc, r); | |
3940 | return FDC_UNKNOWN; | |
3941 | } | |
3942 | ||
3943 | if (!fdc_configure()) { | |
3944 | printk(KERN_INFO "FDC %d is an 82072\n", fdc); | |
3945 | return FDC_82072; /* 82072 doesn't know CONFIGURE */ | |
3946 | } | |
3947 | ||
3948 | output_byte(FD_PERPENDICULAR); | |
3949 | if (need_more_output() == MORE_OUTPUT) { | |
3950 | output_byte(0); | |
3951 | } else { | |
3952 | printk(KERN_INFO "FDC %d is an 82072A\n", fdc); | |
3953 | return FDC_82072A; /* 82072A as found on Sparcs. */ | |
3954 | } | |
3955 | ||
3956 | output_byte(FD_UNLOCK); | |
3957 | r = result(); | |
3958 | if ((r == 1) && (reply_buffer[0] == 0x80)) { | |
3959 | printk(KERN_INFO "FDC %d is a pre-1991 82077\n", fdc); | |
3960 | return FDC_82077_ORIG; /* Pre-1991 82077, doesn't know | |
3961 | * LOCK/UNLOCK */ | |
3962 | } | |
3963 | if ((r != 1) || (reply_buffer[0] != 0x00)) { | |
3964 | printk("FDC %d init: UNLOCK: unexpected return of %d bytes.\n", | |
3965 | fdc, r); | |
3966 | return FDC_UNKNOWN; | |
3967 | } | |
3968 | output_byte(FD_PARTID); | |
3969 | r = result(); | |
3970 | if (r != 1) { | |
3971 | printk("FDC %d init: PARTID: unexpected return of %d bytes.\n", | |
3972 | fdc, r); | |
3973 | return FDC_UNKNOWN; | |
3974 | } | |
3975 | if (reply_buffer[0] == 0x80) { | |
3976 | printk(KERN_INFO "FDC %d is a post-1991 82077\n", fdc); | |
3977 | return FDC_82077; /* Revised 82077AA passes all the tests */ | |
3978 | } | |
3979 | switch (reply_buffer[0] >> 5) { | |
3980 | case 0x0: | |
3981 | /* Either a 82078-1 or a 82078SL running at 5Volt */ | |
3982 | printk(KERN_INFO "FDC %d is an 82078.\n", fdc); | |
3983 | return FDC_82078; | |
3984 | case 0x1: | |
3985 | printk(KERN_INFO "FDC %d is a 44pin 82078\n", fdc); | |
3986 | return FDC_82078; | |
3987 | case 0x2: | |
3988 | printk(KERN_INFO "FDC %d is a S82078B\n", fdc); | |
3989 | return FDC_S82078B; | |
3990 | case 0x3: | |
3991 | printk(KERN_INFO "FDC %d is a National Semiconductor PC87306\n", | |
3992 | fdc); | |
3993 | return FDC_87306; | |
3994 | default: | |
3995 | printk(KERN_INFO | |
3996 | "FDC %d init: 82078 variant with unknown PARTID=%d.\n", | |
3997 | fdc, reply_buffer[0] >> 5); | |
3998 | return FDC_82078_UNKN; | |
3999 | } | |
4000 | } /* get_fdc_version */ | |
4001 | ||
4002 | /* lilo configuration */ | |
4003 | ||
4004 | static void __init floppy_set_flags(int *ints, int param, int param2) | |
4005 | { | |
4006 | int i; | |
4007 | ||
4008 | for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) { | |
4009 | if (param) | |
4010 | default_drive_params[i].params.flags |= param2; | |
4011 | else | |
4012 | default_drive_params[i].params.flags &= ~param2; | |
4013 | } | |
4014 | DPRINT("%s flag 0x%x\n", param2 ? "Setting" : "Clearing", param); | |
4015 | } | |
4016 | ||
4017 | static void __init daring(int *ints, int param, int param2) | |
4018 | { | |
4019 | int i; | |
4020 | ||
4021 | for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) { | |
4022 | if (param) { | |
4023 | default_drive_params[i].params.select_delay = 0; | |
4024 | default_drive_params[i].params.flags |= | |
4025 | FD_SILENT_DCL_CLEAR; | |
4026 | } else { | |
4027 | default_drive_params[i].params.select_delay = | |
4028 | 2 * HZ / 100; | |
4029 | default_drive_params[i].params.flags &= | |
4030 | ~FD_SILENT_DCL_CLEAR; | |
4031 | } | |
4032 | } | |
4033 | DPRINT("Assuming %s floppy hardware\n", param ? "standard" : "broken"); | |
4034 | } | |
4035 | ||
4036 | static void __init set_cmos(int *ints, int dummy, int dummy2) | |
4037 | { | |
4038 | int current_drive = 0; | |
4039 | ||
4040 | if (ints[0] != 2) { | |
4041 | DPRINT("wrong number of parameters for CMOS\n"); | |
4042 | return; | |
4043 | } | |
4044 | current_drive = ints[1]; | |
4045 | if (current_drive < 0 || current_drive >= 8) { | |
4046 | DPRINT("bad drive for set_cmos\n"); | |
4047 | return; | |
4048 | } | |
4049 | #if N_FDC > 1 | |
4050 | if (current_drive >= 4 && !FDC2) | |
4051 | FDC2 = 0x370; | |
4052 | #endif | |
4053 | DP->cmos = ints[2]; | |
4054 | DPRINT("setting CMOS code to %d\n", ints[2]); | |
4055 | } | |
4056 | ||
4057 | static struct param_table { | |
4058 | const char *name; | |
4059 | void (*fn) (int *ints, int param, int param2); | |
4060 | int *var; | |
4061 | int def_param; | |
4062 | int param2; | |
4063 | } config_params[] __initdata = { | |
4064 | {"allowed_drive_mask", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */ | |
4065 | {"all_drives", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */ | |
4066 | {"asus_pci", NULL, &allowed_drive_mask, 0x33, 0}, | |
4067 | {"irq", NULL, &FLOPPY_IRQ, 6, 0}, | |
4068 | {"dma", NULL, &FLOPPY_DMA, 2, 0}, | |
4069 | {"daring", daring, NULL, 1, 0}, | |
4070 | #if N_FDC > 1 | |
4071 | {"two_fdc", NULL, &FDC2, 0x370, 0}, | |
4072 | {"one_fdc", NULL, &FDC2, 0, 0}, | |
4073 | #endif | |
4074 | {"thinkpad", floppy_set_flags, NULL, 1, FD_INVERTED_DCL}, | |
4075 | {"broken_dcl", floppy_set_flags, NULL, 1, FD_BROKEN_DCL}, | |
4076 | {"messages", floppy_set_flags, NULL, 1, FTD_MSG}, | |
4077 | {"silent_dcl_clear", floppy_set_flags, NULL, 1, FD_SILENT_DCL_CLEAR}, | |
4078 | {"debug", floppy_set_flags, NULL, 1, FD_DEBUG}, | |
4079 | {"nodma", NULL, &can_use_virtual_dma, 1, 0}, | |
4080 | {"omnibook", NULL, &can_use_virtual_dma, 1, 0}, | |
4081 | {"yesdma", NULL, &can_use_virtual_dma, 0, 0}, | |
4082 | {"fifo_depth", NULL, &fifo_depth, 0xa, 0}, | |
4083 | {"nofifo", NULL, &no_fifo, 0x20, 0}, | |
4084 | {"usefifo", NULL, &no_fifo, 0, 0}, | |
4085 | {"cmos", set_cmos, NULL, 0, 0}, | |
4086 | {"slow", NULL, &slow_floppy, 1, 0}, | |
4087 | {"unexpected_interrupts", NULL, &print_unex, 1, 0}, | |
4088 | {"no_unexpected_interrupts", NULL, &print_unex, 0, 0}, | |
4089 | {"L40SX", NULL, &print_unex, 0, 0} | |
4090 | ||
4091 | EXTRA_FLOPPY_PARAMS | |
4092 | }; | |
4093 | ||
4094 | static int __init floppy_setup(char *str) | |
4095 | { | |
4096 | int i; | |
4097 | int param; | |
4098 | int ints[11]; | |
4099 | ||
4100 | str = get_options(str, ARRAY_SIZE(ints), ints); | |
4101 | if (str) { | |
4102 | for (i = 0; i < ARRAY_SIZE(config_params); i++) { | |
4103 | if (strcmp(str, config_params[i].name) == 0) { | |
4104 | if (ints[0]) | |
4105 | param = ints[1]; | |
4106 | else | |
4107 | param = config_params[i].def_param; | |
4108 | if (config_params[i].fn) | |
4109 | config_params[i]. | |
4110 | fn(ints, param, | |
4111 | config_params[i].param2); | |
4112 | if (config_params[i].var) { | |
4113 | DPRINT("%s=%d\n", str, param); | |
4114 | *config_params[i].var = param; | |
4115 | } | |
4116 | return 1; | |
4117 | } | |
4118 | } | |
4119 | } | |
4120 | if (str) { | |
4121 | DPRINT("unknown floppy option [%s]\n", str); | |
4122 | ||
4123 | DPRINT("allowed options are:"); | |
4124 | for (i = 0; i < ARRAY_SIZE(config_params); i++) | |
4125 | printk(" %s", config_params[i].name); | |
4126 | printk("\n"); | |
4127 | } else | |
4128 | DPRINT("botched floppy option\n"); | |
31c00fc1 | 4129 | DPRINT("Read Documentation/blockdev/floppy.txt\n"); |
1da177e4 LT |
4130 | return 0; |
4131 | } | |
4132 | ||
4133 | static int have_no_fdc = -ENODEV; | |
4134 | ||
9a8af6b3 AM |
4135 | static ssize_t floppy_cmos_show(struct device *dev, |
4136 | struct device_attribute *attr, char *buf) | |
94fd0db7 | 4137 | { |
71b3e0c1 | 4138 | struct platform_device *p = to_platform_device(dev); |
9a8af6b3 | 4139 | int drive; |
94fd0db7 | 4140 | |
9a8af6b3 AM |
4141 | drive = p->id; |
4142 | return sprintf(buf, "%X\n", UDP->cmos); | |
94fd0db7 | 4143 | } |
94fd0db7 HR |
4144 | DEVICE_ATTR(cmos,S_IRUGO,floppy_cmos_show,NULL); |
4145 | ||
1da177e4 LT |
4146 | static void floppy_device_release(struct device *dev) |
4147 | { | |
1da177e4 LT |
4148 | } |
4149 | ||
94fd0db7 | 4150 | static struct platform_device floppy_device[N_DRIVE]; |
1da177e4 LT |
4151 | |
4152 | static struct kobject *floppy_find(dev_t dev, int *part, void *data) | |
4153 | { | |
4154 | int drive = (*part & 3) | ((*part & 0x80) >> 5); | |
4155 | if (drive >= N_DRIVE || | |
4156 | !(allowed_drive_mask & (1 << drive)) || | |
4157 | fdc_state[FDC(drive)].version == FDC_NONE) | |
4158 | return NULL; | |
945f390f | 4159 | if (((*part >> 2) & 0x1f) >= ARRAY_SIZE(floppy_type)) |
1da177e4 LT |
4160 | return NULL; |
4161 | *part = 0; | |
4162 | return get_disk(disks[drive]); | |
4163 | } | |
4164 | ||
4165 | static int __init floppy_init(void) | |
4166 | { | |
4167 | int i, unit, drive; | |
4168 | int err, dr; | |
4169 | ||
68e1ee62 | 4170 | #if defined(CONFIG_PPC) |
ef16b519 OH |
4171 | if (check_legacy_ioport(FDC1)) |
4172 | return -ENODEV; | |
4173 | #endif | |
4174 | ||
1da177e4 LT |
4175 | raw_cmd = NULL; |
4176 | ||
4177 | for (dr = 0; dr < N_DRIVE; dr++) { | |
4178 | disks[dr] = alloc_disk(1); | |
4179 | if (!disks[dr]) { | |
4180 | err = -ENOMEM; | |
4181 | goto out_put_disk; | |
4182 | } | |
4183 | ||
4184 | disks[dr]->major = FLOPPY_MAJOR; | |
4185 | disks[dr]->first_minor = TOMINOR(dr); | |
4186 | disks[dr]->fops = &floppy_fops; | |
4187 | sprintf(disks[dr]->disk_name, "fd%d", dr); | |
4188 | ||
4189 | init_timer(&motor_off_timer[dr]); | |
4190 | motor_off_timer[dr].data = dr; | |
4191 | motor_off_timer[dr].function = motor_off_callback; | |
4192 | } | |
4193 | ||
1da177e4 LT |
4194 | err = register_blkdev(FLOPPY_MAJOR, "fd"); |
4195 | if (err) | |
8ab5e4c1 | 4196 | goto out_put_disk; |
1da177e4 LT |
4197 | |
4198 | floppy_queue = blk_init_queue(do_fd_request, &floppy_lock); | |
4199 | if (!floppy_queue) { | |
4200 | err = -ENOMEM; | |
4201 | goto out_unreg_blkdev; | |
4202 | } | |
4203 | blk_queue_max_sectors(floppy_queue, 64); | |
4204 | ||
4205 | blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE, | |
4206 | floppy_find, NULL, NULL); | |
4207 | ||
4208 | for (i = 0; i < 256; i++) | |
4209 | if (ITYPE(i)) | |
4210 | floppy_sizes[i] = floppy_type[ITYPE(i)].size; | |
4211 | else | |
4212 | floppy_sizes[i] = MAX_DISK_SIZE << 1; | |
4213 | ||
4214 | reschedule_timeout(MAXTIMEOUT, "floppy init", MAXTIMEOUT); | |
4215 | config_types(); | |
4216 | ||
4217 | for (i = 0; i < N_FDC; i++) { | |
4218 | fdc = i; | |
4219 | CLEARSTRUCT(FDCS); | |
4220 | FDCS->dtr = -1; | |
4221 | FDCS->dor = 0x4; | |
4222 | #if defined(__sparc__) || defined(__mc68000__) | |
4223 | /*sparcs/sun3x don't have a DOR reset which we can fall back on to */ | |
4224 | #ifdef __mc68000__ | |
4225 | if (MACH_IS_SUN3X) | |
4226 | #endif | |
4227 | FDCS->version = FDC_82072A; | |
4228 | #endif | |
4229 | } | |
4230 | ||
4231 | use_virtual_dma = can_use_virtual_dma & 1; | |
1da177e4 LT |
4232 | fdc_state[0].address = FDC1; |
4233 | if (fdc_state[0].address == -1) { | |
4234 | del_timer(&fd_timeout); | |
4235 | err = -ENODEV; | |
4236 | goto out_unreg_region; | |
4237 | } | |
4238 | #if N_FDC > 1 | |
4239 | fdc_state[1].address = FDC2; | |
4240 | #endif | |
4241 | ||
4242 | fdc = 0; /* reset fdc in case of unexpected interrupt */ | |
4243 | err = floppy_grab_irq_and_dma(); | |
4244 | if (err) { | |
4245 | del_timer(&fd_timeout); | |
4246 | err = -EBUSY; | |
4247 | goto out_unreg_region; | |
4248 | } | |
4249 | ||
4250 | /* initialise drive state */ | |
4251 | for (drive = 0; drive < N_DRIVE; drive++) { | |
4252 | CLEARSTRUCT(UDRS); | |
4253 | CLEARSTRUCT(UDRWE); | |
4254 | USETF(FD_DISK_NEWCHANGE); | |
4255 | USETF(FD_DISK_CHANGED); | |
4256 | USETF(FD_VERIFY); | |
4257 | UDRS->fd_device = -1; | |
4258 | floppy_track_buffer = NULL; | |
4259 | max_buffer_sectors = 0; | |
4260 | } | |
4261 | /* | |
4262 | * Small 10 msec delay to let through any interrupt that | |
4263 | * initialization might have triggered, to not | |
4264 | * confuse detection: | |
4265 | */ | |
4266 | msleep(10); | |
4267 | ||
4268 | for (i = 0; i < N_FDC; i++) { | |
4269 | fdc = i; | |
4270 | FDCS->driver_version = FD_DRIVER_VERSION; | |
4271 | for (unit = 0; unit < 4; unit++) | |
4272 | FDCS->track[unit] = 0; | |
4273 | if (FDCS->address == -1) | |
4274 | continue; | |
4275 | FDCS->rawcmd = 2; | |
4276 | if (user_reset_fdc(-1, FD_RESET_ALWAYS, 0)) { | |
4277 | /* free ioports reserved by floppy_grab_irq_and_dma() */ | |
5a74db06 | 4278 | floppy_release_regions(fdc); |
1da177e4 LT |
4279 | FDCS->address = -1; |
4280 | FDCS->version = FDC_NONE; | |
4281 | continue; | |
4282 | } | |
4283 | /* Try to determine the floppy controller type */ | |
4284 | FDCS->version = get_fdc_version(); | |
4285 | if (FDCS->version == FDC_NONE) { | |
4286 | /* free ioports reserved by floppy_grab_irq_and_dma() */ | |
5a74db06 | 4287 | floppy_release_regions(fdc); |
1da177e4 LT |
4288 | FDCS->address = -1; |
4289 | continue; | |
4290 | } | |
4291 | if (can_use_virtual_dma == 2 && FDCS->version < FDC_82072A) | |
4292 | can_use_virtual_dma = 0; | |
4293 | ||
4294 | have_no_fdc = 0; | |
4295 | /* Not all FDCs seem to be able to handle the version command | |
4296 | * properly, so force a reset for the standard FDC clones, | |
4297 | * to avoid interrupt garbage. | |
4298 | */ | |
4299 | user_reset_fdc(-1, FD_RESET_ALWAYS, 0); | |
4300 | } | |
4301 | fdc = 0; | |
4302 | del_timer(&fd_timeout); | |
4303 | current_drive = 0; | |
1da177e4 LT |
4304 | initialising = 0; |
4305 | if (have_no_fdc) { | |
4306 | DPRINT("no floppy controllers found\n"); | |
4307 | err = have_no_fdc; | |
4308 | goto out_flush_work; | |
4309 | } | |
4310 | ||
1da177e4 LT |
4311 | for (drive = 0; drive < N_DRIVE; drive++) { |
4312 | if (!(allowed_drive_mask & (1 << drive))) | |
4313 | continue; | |
4314 | if (fdc_state[FDC(drive)].version == FDC_NONE) | |
4315 | continue; | |
94fd0db7 HR |
4316 | |
4317 | floppy_device[drive].name = floppy_device_name; | |
4318 | floppy_device[drive].id = drive; | |
4319 | floppy_device[drive].dev.release = floppy_device_release; | |
4320 | ||
4321 | err = platform_device_register(&floppy_device[drive]); | |
4322 | if (err) | |
4323 | goto out_flush_work; | |
4324 | ||
4ea1b0f4 DM |
4325 | err = device_create_file(&floppy_device[drive].dev,&dev_attr_cmos); |
4326 | if (err) | |
4327 | goto out_unreg_platform_dev; | |
4328 | ||
1da177e4 LT |
4329 | /* to be cleaned up... */ |
4330 | disks[drive]->private_data = (void *)(long)drive; | |
4331 | disks[drive]->queue = floppy_queue; | |
4332 | disks[drive]->flags |= GENHD_FL_REMOVABLE; | |
94fd0db7 | 4333 | disks[drive]->driverfs_dev = &floppy_device[drive].dev; |
1da177e4 LT |
4334 | add_disk(disks[drive]); |
4335 | } | |
4336 | ||
4337 | return 0; | |
4338 | ||
4ea1b0f4 DM |
4339 | out_unreg_platform_dev: |
4340 | platform_device_unregister(&floppy_device[drive]); | |
1da177e4 LT |
4341 | out_flush_work: |
4342 | flush_scheduled_work(); | |
4343 | if (usage_count) | |
4344 | floppy_release_irq_and_dma(); | |
4345 | out_unreg_region: | |
4346 | blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); | |
4347 | blk_cleanup_queue(floppy_queue); | |
4348 | out_unreg_blkdev: | |
4349 | unregister_blkdev(FLOPPY_MAJOR, "fd"); | |
1da177e4 LT |
4350 | out_put_disk: |
4351 | while (dr--) { | |
4352 | del_timer(&motor_off_timer[dr]); | |
4353 | put_disk(disks[dr]); | |
4354 | } | |
4355 | return err; | |
4356 | } | |
4357 | ||
4358 | static DEFINE_SPINLOCK(floppy_usage_lock); | |
4359 | ||
5a74db06 PDM |
4360 | static const struct io_region { |
4361 | int offset; | |
4362 | int size; | |
4363 | } io_regions[] = { | |
4364 | { 2, 1 }, | |
4365 | /* address + 3 is sometimes reserved by pnp bios for motherboard */ | |
4366 | { 4, 2 }, | |
4367 | /* address + 6 is reserved, and may be taken by IDE. | |
4368 | * Unfortunately, Adaptec doesn't know this :-(, */ | |
4369 | { 7, 1 }, | |
4370 | }; | |
4371 | ||
4372 | static void floppy_release_allocated_regions(int fdc, const struct io_region *p) | |
4373 | { | |
4374 | while (p != io_regions) { | |
4375 | p--; | |
4376 | release_region(FDCS->address + p->offset, p->size); | |
4377 | } | |
4378 | } | |
4379 | ||
4380 | #define ARRAY_END(X) (&((X)[ARRAY_SIZE(X)])) | |
4381 | ||
4382 | static int floppy_request_regions(int fdc) | |
4383 | { | |
4384 | const struct io_region *p; | |
4385 | ||
4386 | for (p = io_regions; p < ARRAY_END(io_regions); p++) { | |
4387 | if (!request_region(FDCS->address + p->offset, p->size, "floppy")) { | |
4388 | DPRINT("Floppy io-port 0x%04lx in use\n", FDCS->address + p->offset); | |
4389 | floppy_release_allocated_regions(fdc, p); | |
4390 | return -EBUSY; | |
4391 | } | |
4392 | } | |
4393 | return 0; | |
4394 | } | |
4395 | ||
4396 | static void floppy_release_regions(int fdc) | |
4397 | { | |
4398 | floppy_release_allocated_regions(fdc, ARRAY_END(io_regions)); | |
4399 | } | |
4400 | ||
1da177e4 LT |
4401 | static int floppy_grab_irq_and_dma(void) |
4402 | { | |
4403 | unsigned long flags; | |
4404 | ||
4405 | spin_lock_irqsave(&floppy_usage_lock, flags); | |
4406 | if (usage_count++) { | |
4407 | spin_unlock_irqrestore(&floppy_usage_lock, flags); | |
4408 | return 0; | |
4409 | } | |
4410 | spin_unlock_irqrestore(&floppy_usage_lock, flags); | |
6dc659d8 IM |
4411 | |
4412 | /* | |
4413 | * We might have scheduled a free_irq(), wait it to | |
4414 | * drain first: | |
4415 | */ | |
4416 | flush_scheduled_work(); | |
4417 | ||
1da177e4 LT |
4418 | if (fd_request_irq()) { |
4419 | DPRINT("Unable to grab IRQ%d for the floppy driver\n", | |
4420 | FLOPPY_IRQ); | |
4421 | spin_lock_irqsave(&floppy_usage_lock, flags); | |
4422 | usage_count--; | |
4423 | spin_unlock_irqrestore(&floppy_usage_lock, flags); | |
4424 | return -1; | |
4425 | } | |
4426 | if (fd_request_dma()) { | |
4427 | DPRINT("Unable to grab DMA%d for the floppy driver\n", | |
4428 | FLOPPY_DMA); | |
2e9c47cd JB |
4429 | if (can_use_virtual_dma & 2) |
4430 | use_virtual_dma = can_use_virtual_dma = 1; | |
4431 | if (!(can_use_virtual_dma & 1)) { | |
4432 | fd_free_irq(); | |
4433 | spin_lock_irqsave(&floppy_usage_lock, flags); | |
4434 | usage_count--; | |
4435 | spin_unlock_irqrestore(&floppy_usage_lock, flags); | |
4436 | return -1; | |
4437 | } | |
1da177e4 LT |
4438 | } |
4439 | ||
4440 | for (fdc = 0; fdc < N_FDC; fdc++) { | |
4441 | if (FDCS->address != -1) { | |
5a74db06 PDM |
4442 | if (floppy_request_regions(fdc)) |
4443 | goto cleanup; | |
1da177e4 LT |
4444 | } |
4445 | } | |
4446 | for (fdc = 0; fdc < N_FDC; fdc++) { | |
4447 | if (FDCS->address != -1) { | |
4448 | reset_fdc_info(1); | |
4449 | fd_outb(FDCS->dor, FD_DOR); | |
4450 | } | |
4451 | } | |
4452 | fdc = 0; | |
4453 | set_dor(0, ~0, 8); /* avoid immediate interrupt */ | |
4454 | ||
4455 | for (fdc = 0; fdc < N_FDC; fdc++) | |
4456 | if (FDCS->address != -1) | |
4457 | fd_outb(FDCS->dor, FD_DOR); | |
4458 | /* | |
06f748c4 JJ |
4459 | * The driver will try and free resources and relies on us |
4460 | * to know if they were allocated or not. | |
1da177e4 LT |
4461 | */ |
4462 | fdc = 0; | |
4463 | irqdma_allocated = 1; | |
4464 | return 0; | |
5a74db06 | 4465 | cleanup: |
1da177e4 LT |
4466 | fd_free_irq(); |
4467 | fd_free_dma(); | |
5a74db06 PDM |
4468 | while (--fdc >= 0) |
4469 | floppy_release_regions(fdc); | |
1da177e4 LT |
4470 | spin_lock_irqsave(&floppy_usage_lock, flags); |
4471 | usage_count--; | |
4472 | spin_unlock_irqrestore(&floppy_usage_lock, flags); | |
4473 | return -1; | |
4474 | } | |
4475 | ||
4476 | static void floppy_release_irq_and_dma(void) | |
4477 | { | |
4478 | int old_fdc; | |
4479 | #ifdef FLOPPY_SANITY_CHECK | |
4480 | #ifndef __sparc__ | |
4481 | int drive; | |
4482 | #endif | |
4483 | #endif | |
4484 | long tmpsize; | |
4485 | unsigned long tmpaddr; | |
4486 | unsigned long flags; | |
4487 | ||
4488 | spin_lock_irqsave(&floppy_usage_lock, flags); | |
4489 | if (--usage_count) { | |
4490 | spin_unlock_irqrestore(&floppy_usage_lock, flags); | |
4491 | return; | |
4492 | } | |
4493 | spin_unlock_irqrestore(&floppy_usage_lock, flags); | |
4494 | if (irqdma_allocated) { | |
4495 | fd_disable_dma(); | |
4496 | fd_free_dma(); | |
3e541a4a | 4497 | fd_free_irq(); |
1da177e4 LT |
4498 | irqdma_allocated = 0; |
4499 | } | |
4500 | set_dor(0, ~0, 8); | |
4501 | #if N_FDC > 1 | |
4502 | set_dor(1, ~8, 0); | |
4503 | #endif | |
4504 | floppy_enable_hlt(); | |
4505 | ||
4506 | if (floppy_track_buffer && max_buffer_sectors) { | |
4507 | tmpsize = max_buffer_sectors * 1024; | |
4508 | tmpaddr = (unsigned long)floppy_track_buffer; | |
4509 | floppy_track_buffer = NULL; | |
4510 | max_buffer_sectors = 0; | |
4511 | buffer_min = buffer_max = -1; | |
4512 | fd_dma_mem_free(tmpaddr, tmpsize); | |
4513 | } | |
4514 | #ifdef FLOPPY_SANITY_CHECK | |
4515 | #ifndef __sparc__ | |
4516 | for (drive = 0; drive < N_FDC * 4; drive++) | |
4517 | if (timer_pending(motor_off_timer + drive)) | |
4518 | printk("motor off timer %d still active\n", drive); | |
4519 | #endif | |
4520 | ||
4521 | if (timer_pending(&fd_timeout)) | |
4522 | printk("floppy timer still active:%s\n", timeout_message); | |
4523 | if (timer_pending(&fd_timer)) | |
4524 | printk("auxiliary floppy timer still active\n"); | |
365970a1 | 4525 | if (work_pending(&floppy_work)) |
1da177e4 LT |
4526 | printk("work still pending\n"); |
4527 | #endif | |
4528 | old_fdc = fdc; | |
4529 | for (fdc = 0; fdc < N_FDC; fdc++) | |
5a74db06 PDM |
4530 | if (FDCS->address != -1) |
4531 | floppy_release_regions(fdc); | |
1da177e4 LT |
4532 | fdc = old_fdc; |
4533 | } | |
4534 | ||
4535 | #ifdef MODULE | |
4536 | ||
4537 | static char *floppy; | |
4538 | ||
1da177e4 LT |
4539 | static void __init parse_floppy_cfg_string(char *cfg) |
4540 | { | |
4541 | char *ptr; | |
4542 | ||
4543 | while (*cfg) { | |
4544 | for (ptr = cfg; *cfg && *cfg != ' ' && *cfg != '\t'; cfg++) ; | |
4545 | if (*cfg) { | |
4546 | *cfg = '\0'; | |
4547 | cfg++; | |
4548 | } | |
4549 | if (*ptr) | |
4550 | floppy_setup(ptr); | |
4551 | } | |
4552 | } | |
4553 | ||
7afea3bc | 4554 | static int __init floppy_module_init(void) |
1da177e4 LT |
4555 | { |
4556 | if (floppy) | |
4557 | parse_floppy_cfg_string(floppy); | |
4558 | return floppy_init(); | |
4559 | } | |
7afea3bc | 4560 | module_init(floppy_module_init); |
1da177e4 | 4561 | |
7afea3bc | 4562 | static void __exit floppy_module_exit(void) |
1da177e4 LT |
4563 | { |
4564 | int drive; | |
4565 | ||
1da177e4 LT |
4566 | blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); |
4567 | unregister_blkdev(FLOPPY_MAJOR, "fd"); | |
4568 | ||
4569 | for (drive = 0; drive < N_DRIVE; drive++) { | |
4570 | del_timer_sync(&motor_off_timer[drive]); | |
4571 | ||
4572 | if ((allowed_drive_mask & (1 << drive)) && | |
4573 | fdc_state[FDC(drive)].version != FDC_NONE) { | |
4574 | del_gendisk(disks[drive]); | |
94fd0db7 HR |
4575 | device_remove_file(&floppy_device[drive].dev, &dev_attr_cmos); |
4576 | platform_device_unregister(&floppy_device[drive]); | |
1da177e4 LT |
4577 | } |
4578 | put_disk(disks[drive]); | |
4579 | } | |
1da177e4 LT |
4580 | |
4581 | del_timer_sync(&fd_timeout); | |
4582 | del_timer_sync(&fd_timer); | |
4583 | blk_cleanup_queue(floppy_queue); | |
4584 | ||
4585 | if (usage_count) | |
4586 | floppy_release_irq_and_dma(); | |
4587 | ||
4588 | /* eject disk, if any */ | |
4589 | fd_eject(0); | |
1da177e4 | 4590 | } |
7afea3bc | 4591 | module_exit(floppy_module_exit); |
1da177e4 LT |
4592 | |
4593 | module_param(floppy, charp, 0); | |
4594 | module_param(FLOPPY_IRQ, int, 0); | |
4595 | module_param(FLOPPY_DMA, int, 0); | |
4596 | MODULE_AUTHOR("Alain L. Knaff"); | |
4597 | MODULE_SUPPORTED_DEVICE("fd"); | |
4598 | MODULE_LICENSE("GPL"); | |
4599 | ||
4600 | #else | |
4601 | ||
4602 | __setup("floppy=", floppy_setup); | |
4603 | module_init(floppy_init) | |
4604 | #endif | |
4605 | ||
4606 | MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR); |