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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (C) 1996 - 1999 Gadi Oxman <gadio@netvision.net.il> |
3 | * Copyright (C) 2000 - 2002 Paul Bristow <paul@paulbristow.net> | |
4 | */ | |
5 | ||
6 | /* | |
7 | * IDE ATAPI floppy driver. | |
8 | * | |
9 | * The driver currently doesn't have any fancy features, just the bare | |
10 | * minimum read/write support. | |
11 | * | |
12 | * This driver supports the following IDE floppy drives: | |
13 | * | |
14 | * LS-120/240 SuperDisk | |
15 | * Iomega Zip 100/250 | |
16 | * Iomega PC Card Clik!/PocketZip | |
17 | * | |
18 | * Many thanks to Lode Leroy <Lode.Leroy@www.ibase.be>, who tested so many | |
19 | * ALPHA patches to this driver on an EASYSTOR LS-120 ATAPI floppy drive. | |
20 | * | |
21 | * Ver 0.1 Oct 17 96 Initial test version, mostly based on ide-tape.c. | |
22 | * Ver 0.2 Oct 31 96 Minor changes. | |
23 | * Ver 0.3 Dec 2 96 Fixed error recovery bug. | |
24 | * Ver 0.4 Jan 26 97 Add support for the HDIO_GETGEO ioctl. | |
25 | * Ver 0.5 Feb 21 97 Add partitions support. | |
26 | * Use the minimum of the LBA and CHS capacities. | |
27 | * Avoid hwgroup->rq == NULL on the last irq. | |
28 | * Fix potential null dereferencing with DEBUG_LOG. | |
29 | * Ver 0.8 Dec 7 97 Increase irq timeout from 10 to 50 seconds. | |
30 | * Add media write-protect detection. | |
31 | * Issue START command only if TEST UNIT READY fails. | |
32 | * Add work-around for IOMEGA ZIP revision 21.D. | |
33 | * Remove idefloppy_get_capabilities(). | |
34 | * Ver 0.9 Jul 4 99 Fix a bug which might have caused the number of | |
35 | * bytes requested on each interrupt to be zero. | |
36 | * Thanks to <shanos@es.co.nz> for pointing this out. | |
37 | * Ver 0.9.sv Jan 6 01 Sam Varshavchik <mrsam@courier-mta.com> | |
38 | * Implement low level formatting. Reimplemented | |
39 | * IDEFLOPPY_CAPABILITIES_PAGE, since we need the srfp | |
40 | * bit. My LS-120 drive barfs on | |
41 | * IDEFLOPPY_CAPABILITIES_PAGE, but maybe it's just me. | |
42 | * Compromise by not reporting a failure to get this | |
43 | * mode page. Implemented four IOCTLs in order to | |
44 | * implement formatting. IOCTls begin with 0x4600, | |
45 | * 0x46 is 'F' as in Format. | |
46 | * Jan 9 01 Userland option to select format verify. | |
47 | * Added PC_SUPPRESS_ERROR flag - some idefloppy drives | |
48 | * do not implement IDEFLOPPY_CAPABILITIES_PAGE, and | |
49 | * return a sense error. Suppress error reporting in | |
50 | * this particular case in order to avoid spurious | |
51 | * errors in syslog. The culprit is | |
52 | * idefloppy_get_capability_page(), so move it to | |
53 | * idefloppy_begin_format() so that it's not used | |
54 | * unless absolutely necessary. | |
55 | * If drive does not support format progress indication | |
56 | * monitor the dsc bit in the status register. | |
57 | * Also, O_NDELAY on open will allow the device to be | |
58 | * opened without a disk available. This can be used to | |
59 | * open an unformatted disk, or get the device capacity. | |
60 | * Ver 0.91 Dec 11 99 Added IOMEGA Clik! drive support by | |
61 | * <paul@paulbristow.net> | |
62 | * Ver 0.92 Oct 22 00 Paul Bristow became official maintainer for this | |
63 | * driver. Included Powerbook internal zip kludge. | |
64 | * Ver 0.93 Oct 24 00 Fixed bugs for Clik! drive | |
65 | * no disk on insert and disk change now works | |
66 | * Ver 0.94 Oct 27 00 Tidied up to remove strstr(Clik) everywhere | |
67 | * Ver 0.95 Nov 7 00 Brought across to kernel 2.4 | |
68 | * Ver 0.96 Jan 7 01 Actually in line with release version of 2.4.0 | |
69 | * including set_bit patch from Rusty Russell | |
70 | * Ver 0.97 Jul 22 01 Merge 0.91-0.96 onto 0.9.sv for ac series | |
71 | * Ver 0.97.sv Aug 3 01 Backported from 2.4.7-ac3 | |
72 | * Ver 0.98 Oct 26 01 Split idefloppy_transfer_pc into two pieces to | |
73 | * fix a lost interrupt problem. It appears the busy | |
74 | * bit was being deasserted by my IOMEGA ATAPI ZIP 100 | |
75 | * drive before the drive was actually ready. | |
76 | * Ver 0.98a Oct 29 01 Expose delay value so we can play. | |
77 | * Ver 0.99 Feb 24 02 Remove duplicate code, modify clik! detection code | |
78 | * to support new PocketZip drives | |
79 | */ | |
80 | ||
81 | #define IDEFLOPPY_VERSION "0.99.newide" | |
82 | ||
1da177e4 LT |
83 | #include <linux/module.h> |
84 | #include <linux/types.h> | |
85 | #include <linux/string.h> | |
86 | #include <linux/kernel.h> | |
87 | #include <linux/delay.h> | |
88 | #include <linux/timer.h> | |
89 | #include <linux/mm.h> | |
90 | #include <linux/interrupt.h> | |
91 | #include <linux/major.h> | |
92 | #include <linux/errno.h> | |
93 | #include <linux/genhd.h> | |
94 | #include <linux/slab.h> | |
95 | #include <linux/cdrom.h> | |
96 | #include <linux/ide.h> | |
97 | #include <linux/bitops.h> | |
cf8b8975 | 98 | #include <linux/mutex.h> |
1da177e4 | 99 | |
89636af2 BZ |
100 | #include <scsi/scsi_ioctl.h> |
101 | ||
1da177e4 LT |
102 | #include <asm/byteorder.h> |
103 | #include <asm/irq.h> | |
104 | #include <asm/uaccess.h> | |
105 | #include <asm/io.h> | |
106 | #include <asm/unaligned.h> | |
107 | ||
108 | /* | |
109 | * The following are used to debug the driver. | |
110 | */ | |
111 | #define IDEFLOPPY_DEBUG_LOG 0 | |
112 | #define IDEFLOPPY_DEBUG_INFO 0 | |
113 | #define IDEFLOPPY_DEBUG_BUGS 1 | |
114 | ||
115 | /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */ | |
116 | #define IDEFLOPPY_DEBUG( fmt, args... ) | |
117 | ||
118 | #if IDEFLOPPY_DEBUG_LOG | |
119 | #define debug_log printk | |
120 | #else | |
121 | #define debug_log(fmt, args... ) do {} while(0) | |
122 | #endif | |
123 | ||
124 | ||
125 | /* | |
126 | * Some drives require a longer irq timeout. | |
127 | */ | |
128 | #define IDEFLOPPY_WAIT_CMD (5 * WAIT_CMD) | |
129 | ||
130 | /* | |
131 | * After each failed packet command we issue a request sense command | |
132 | * and retry the packet command IDEFLOPPY_MAX_PC_RETRIES times. | |
133 | */ | |
134 | #define IDEFLOPPY_MAX_PC_RETRIES 3 | |
135 | ||
136 | /* | |
137 | * With each packet command, we allocate a buffer of | |
138 | * IDEFLOPPY_PC_BUFFER_SIZE bytes. | |
139 | */ | |
140 | #define IDEFLOPPY_PC_BUFFER_SIZE 256 | |
141 | ||
142 | /* | |
143 | * In various places in the driver, we need to allocate storage | |
144 | * for packet commands and requests, which will remain valid while | |
145 | * we leave the driver to wait for an interrupt or a timeout event. | |
146 | */ | |
147 | #define IDEFLOPPY_PC_STACK (10 + IDEFLOPPY_MAX_PC_RETRIES) | |
148 | ||
149 | /* | |
150 | * Our view of a packet command. | |
151 | */ | |
152 | typedef struct idefloppy_packet_command_s { | |
153 | u8 c[12]; /* Actual packet bytes */ | |
154 | int retries; /* On each retry, we increment retries */ | |
155 | int error; /* Error code */ | |
156 | int request_transfer; /* Bytes to transfer */ | |
157 | int actually_transferred; /* Bytes actually transferred */ | |
158 | int buffer_size; /* Size of our data buffer */ | |
159 | int b_count; /* Missing/Available data on the current buffer */ | |
160 | struct request *rq; /* The corresponding request */ | |
161 | u8 *buffer; /* Data buffer */ | |
162 | u8 *current_position; /* Pointer into the above buffer */ | |
163 | void (*callback) (ide_drive_t *); /* Called when this packet command is completed */ | |
164 | u8 pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE]; /* Temporary buffer */ | |
165 | unsigned long flags; /* Status/Action bit flags: long for set_bit */ | |
166 | } idefloppy_pc_t; | |
167 | ||
168 | /* | |
169 | * Packet command flag bits. | |
170 | */ | |
171 | #define PC_ABORT 0 /* Set when an error is considered normal - We won't retry */ | |
172 | #define PC_DMA_RECOMMENDED 2 /* 1 when we prefer to use DMA if possible */ | |
173 | #define PC_DMA_IN_PROGRESS 3 /* 1 while DMA in progress */ | |
174 | #define PC_DMA_ERROR 4 /* 1 when encountered problem during DMA */ | |
175 | #define PC_WRITING 5 /* Data direction */ | |
176 | ||
177 | #define PC_SUPPRESS_ERROR 6 /* Suppress error reporting */ | |
178 | ||
179 | /* | |
180 | * Removable Block Access Capabilities Page | |
181 | */ | |
182 | typedef struct { | |
183 | #if defined(__LITTLE_ENDIAN_BITFIELD) | |
184 | unsigned page_code :6; /* Page code - Should be 0x1b */ | |
185 | unsigned reserved1_6 :1; /* Reserved */ | |
186 | unsigned ps :1; /* Should be 0 */ | |
187 | #elif defined(__BIG_ENDIAN_BITFIELD) | |
188 | unsigned ps :1; /* Should be 0 */ | |
189 | unsigned reserved1_6 :1; /* Reserved */ | |
190 | unsigned page_code :6; /* Page code - Should be 0x1b */ | |
191 | #else | |
192 | #error "Bitfield endianness not defined! Check your byteorder.h" | |
193 | #endif | |
194 | u8 page_length; /* Page Length - Should be 0xa */ | |
195 | #if defined(__LITTLE_ENDIAN_BITFIELD) | |
196 | unsigned reserved2 :6; | |
197 | unsigned srfp :1; /* Supports reporting progress of format */ | |
198 | unsigned sflp :1; /* System floppy type device */ | |
199 | unsigned tlun :3; /* Total logical units supported by the device */ | |
200 | unsigned reserved3 :3; | |
201 | unsigned sml :1; /* Single / Multiple lun supported */ | |
202 | unsigned ncd :1; /* Non cd optical device */ | |
203 | #elif defined(__BIG_ENDIAN_BITFIELD) | |
204 | unsigned sflp :1; /* System floppy type device */ | |
205 | unsigned srfp :1; /* Supports reporting progress of format */ | |
206 | unsigned reserved2 :6; | |
207 | unsigned ncd :1; /* Non cd optical device */ | |
208 | unsigned sml :1; /* Single / Multiple lun supported */ | |
209 | unsigned reserved3 :3; | |
210 | unsigned tlun :3; /* Total logical units supported by the device */ | |
211 | #else | |
212 | #error "Bitfield endianness not defined! Check your byteorder.h" | |
213 | #endif | |
214 | u8 reserved[8]; | |
215 | } idefloppy_capabilities_page_t; | |
216 | ||
217 | /* | |
218 | * Flexible disk page. | |
219 | */ | |
220 | typedef struct { | |
221 | #if defined(__LITTLE_ENDIAN_BITFIELD) | |
222 | unsigned page_code :6; /* Page code - Should be 0x5 */ | |
223 | unsigned reserved1_6 :1; /* Reserved */ | |
224 | unsigned ps :1; /* The device is capable of saving the page */ | |
225 | #elif defined(__BIG_ENDIAN_BITFIELD) | |
226 | unsigned ps :1; /* The device is capable of saving the page */ | |
227 | unsigned reserved1_6 :1; /* Reserved */ | |
228 | unsigned page_code :6; /* Page code - Should be 0x5 */ | |
229 | #else | |
230 | #error "Bitfield endianness not defined! Check your byteorder.h" | |
231 | #endif | |
232 | u8 page_length; /* Page Length - Should be 0x1e */ | |
233 | u16 transfer_rate; /* In kilobits per second */ | |
234 | u8 heads, sectors; /* Number of heads, Number of sectors per track */ | |
235 | u16 sector_size; /* Byes per sector */ | |
236 | u16 cyls; /* Number of cylinders */ | |
237 | u8 reserved10[10]; | |
238 | u8 motor_delay; /* Motor off delay */ | |
239 | u8 reserved21[7]; | |
240 | u16 rpm; /* Rotations per minute */ | |
241 | u8 reserved30[2]; | |
242 | } idefloppy_flexible_disk_page_t; | |
243 | ||
244 | /* | |
245 | * Format capacity | |
246 | */ | |
247 | typedef struct { | |
248 | u8 reserved[3]; | |
249 | u8 length; /* Length of the following descriptors in bytes */ | |
250 | } idefloppy_capacity_header_t; | |
251 | ||
252 | typedef struct { | |
253 | u32 blocks; /* Number of blocks */ | |
254 | #if defined(__LITTLE_ENDIAN_BITFIELD) | |
255 | unsigned dc :2; /* Descriptor Code */ | |
256 | unsigned reserved :6; | |
257 | #elif defined(__BIG_ENDIAN_BITFIELD) | |
258 | unsigned reserved :6; | |
259 | unsigned dc :2; /* Descriptor Code */ | |
260 | #else | |
261 | #error "Bitfield endianness not defined! Check your byteorder.h" | |
262 | #endif | |
263 | u8 length_msb; /* Block Length (MSB)*/ | |
264 | u16 length; /* Block Length */ | |
265 | } idefloppy_capacity_descriptor_t; | |
266 | ||
267 | #define CAPACITY_INVALID 0x00 | |
268 | #define CAPACITY_UNFORMATTED 0x01 | |
269 | #define CAPACITY_CURRENT 0x02 | |
270 | #define CAPACITY_NO_CARTRIDGE 0x03 | |
271 | ||
272 | /* | |
273 | * Most of our global data which we need to save even as we leave the | |
274 | * driver due to an interrupt or a timer event is stored in a variable | |
275 | * of type idefloppy_floppy_t, defined below. | |
276 | */ | |
277 | typedef struct ide_floppy_obj { | |
278 | ide_drive_t *drive; | |
279 | ide_driver_t *driver; | |
280 | struct gendisk *disk; | |
281 | struct kref kref; | |
c94964a4 | 282 | unsigned int openers; /* protected by BKL for now */ |
1da177e4 LT |
283 | |
284 | /* Current packet command */ | |
285 | idefloppy_pc_t *pc; | |
286 | /* Last failed packet command */ | |
287 | idefloppy_pc_t *failed_pc; | |
288 | /* Packet command stack */ | |
289 | idefloppy_pc_t pc_stack[IDEFLOPPY_PC_STACK]; | |
290 | /* Next free packet command storage space */ | |
291 | int pc_stack_index; | |
292 | struct request rq_stack[IDEFLOPPY_PC_STACK]; | |
293 | /* We implement a circular array */ | |
294 | int rq_stack_index; | |
295 | ||
296 | /* | |
297 | * Last error information | |
298 | */ | |
299 | u8 sense_key, asc, ascq; | |
300 | /* delay this long before sending packet command */ | |
301 | u8 ticks; | |
302 | int progress_indication; | |
303 | ||
304 | /* | |
305 | * Device information | |
306 | */ | |
307 | /* Current format */ | |
308 | int blocks, block_size, bs_factor; | |
309 | /* Last format capacity */ | |
310 | idefloppy_capacity_descriptor_t capacity; | |
311 | /* Copy of the flexible disk page */ | |
312 | idefloppy_flexible_disk_page_t flexible_disk_page; | |
313 | /* Write protect */ | |
314 | int wp; | |
315 | /* Supports format progress report */ | |
316 | int srfp; | |
317 | /* Status/Action flags */ | |
318 | unsigned long flags; | |
319 | } idefloppy_floppy_t; | |
320 | ||
c40d3d38 | 321 | #define IDEFLOPPY_TICKS_DELAY HZ/20 /* default delay for ZIP 100 (50ms) */ |
1da177e4 LT |
322 | |
323 | /* | |
324 | * Floppy flag bits values. | |
325 | */ | |
326 | #define IDEFLOPPY_DRQ_INTERRUPT 0 /* DRQ interrupt device */ | |
327 | #define IDEFLOPPY_MEDIA_CHANGED 1 /* Media may have changed */ | |
328 | #define IDEFLOPPY_USE_READ12 2 /* Use READ12/WRITE12 or READ10/WRITE10 */ | |
329 | #define IDEFLOPPY_FORMAT_IN_PROGRESS 3 /* Format in progress */ | |
330 | #define IDEFLOPPY_CLIK_DRIVE 4 /* Avoid commands not supported in Clik drive */ | |
331 | #define IDEFLOPPY_ZIP_DRIVE 5 /* Requires BH algorithm for packets */ | |
332 | ||
333 | /* | |
334 | * ATAPI floppy drive packet commands | |
335 | */ | |
336 | #define IDEFLOPPY_FORMAT_UNIT_CMD 0x04 | |
337 | #define IDEFLOPPY_INQUIRY_CMD 0x12 | |
338 | #define IDEFLOPPY_MODE_SELECT_CMD 0x55 | |
339 | #define IDEFLOPPY_MODE_SENSE_CMD 0x5a | |
340 | #define IDEFLOPPY_READ10_CMD 0x28 | |
341 | #define IDEFLOPPY_READ12_CMD 0xa8 | |
342 | #define IDEFLOPPY_READ_CAPACITY_CMD 0x23 | |
343 | #define IDEFLOPPY_REQUEST_SENSE_CMD 0x03 | |
344 | #define IDEFLOPPY_PREVENT_REMOVAL_CMD 0x1e | |
345 | #define IDEFLOPPY_SEEK_CMD 0x2b | |
346 | #define IDEFLOPPY_START_STOP_CMD 0x1b | |
347 | #define IDEFLOPPY_TEST_UNIT_READY_CMD 0x00 | |
348 | #define IDEFLOPPY_VERIFY_CMD 0x2f | |
349 | #define IDEFLOPPY_WRITE10_CMD 0x2a | |
350 | #define IDEFLOPPY_WRITE12_CMD 0xaa | |
351 | #define IDEFLOPPY_WRITE_VERIFY_CMD 0x2e | |
352 | ||
353 | /* | |
354 | * Defines for the mode sense command | |
355 | */ | |
356 | #define MODE_SENSE_CURRENT 0x00 | |
357 | #define MODE_SENSE_CHANGEABLE 0x01 | |
358 | #define MODE_SENSE_DEFAULT 0x02 | |
359 | #define MODE_SENSE_SAVED 0x03 | |
360 | ||
361 | /* | |
362 | * IOCTLs used in low-level formatting. | |
363 | */ | |
364 | ||
365 | #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED 0x4600 | |
366 | #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY 0x4601 | |
367 | #define IDEFLOPPY_IOCTL_FORMAT_START 0x4602 | |
368 | #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS 0x4603 | |
369 | ||
1da177e4 LT |
370 | /* |
371 | * Error codes which are returned in rq->errors to the higher part | |
372 | * of the driver. | |
373 | */ | |
374 | #define IDEFLOPPY_ERROR_GENERAL 101 | |
375 | ||
376 | /* | |
377 | * The following is used to format the general configuration word of | |
378 | * the ATAPI IDENTIFY DEVICE command. | |
379 | */ | |
380 | struct idefloppy_id_gcw { | |
381 | #if defined(__LITTLE_ENDIAN_BITFIELD) | |
382 | unsigned packet_size :2; /* Packet Size */ | |
383 | unsigned reserved234 :3; /* Reserved */ | |
384 | unsigned drq_type :2; /* Command packet DRQ type */ | |
385 | unsigned removable :1; /* Removable media */ | |
386 | unsigned device_type :5; /* Device type */ | |
387 | unsigned reserved13 :1; /* Reserved */ | |
388 | unsigned protocol :2; /* Protocol type */ | |
389 | #elif defined(__BIG_ENDIAN_BITFIELD) | |
390 | unsigned protocol :2; /* Protocol type */ | |
391 | unsigned reserved13 :1; /* Reserved */ | |
392 | unsigned device_type :5; /* Device type */ | |
393 | unsigned removable :1; /* Removable media */ | |
394 | unsigned drq_type :2; /* Command packet DRQ type */ | |
395 | unsigned reserved234 :3; /* Reserved */ | |
396 | unsigned packet_size :2; /* Packet Size */ | |
397 | #else | |
398 | #error "Bitfield endianness not defined! Check your byteorder.h" | |
399 | #endif | |
400 | }; | |
401 | ||
402 | /* | |
403 | * INQUIRY packet command - Data Format | |
404 | */ | |
405 | typedef struct { | |
406 | #if defined(__LITTLE_ENDIAN_BITFIELD) | |
407 | unsigned device_type :5; /* Peripheral Device Type */ | |
408 | unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */ | |
409 | unsigned reserved1_6t0 :7; /* Reserved */ | |
410 | unsigned rmb :1; /* Removable Medium Bit */ | |
411 | unsigned ansi_version :3; /* ANSI Version */ | |
412 | unsigned ecma_version :3; /* ECMA Version */ | |
413 | unsigned iso_version :2; /* ISO Version */ | |
414 | unsigned response_format :4; /* Response Data Format */ | |
415 | unsigned reserved3_45 :2; /* Reserved */ | |
416 | unsigned reserved3_6 :1; /* TrmIOP - Reserved */ | |
417 | unsigned reserved3_7 :1; /* AENC - Reserved */ | |
418 | #elif defined(__BIG_ENDIAN_BITFIELD) | |
419 | unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */ | |
420 | unsigned device_type :5; /* Peripheral Device Type */ | |
421 | unsigned rmb :1; /* Removable Medium Bit */ | |
422 | unsigned reserved1_6t0 :7; /* Reserved */ | |
423 | unsigned iso_version :2; /* ISO Version */ | |
424 | unsigned ecma_version :3; /* ECMA Version */ | |
425 | unsigned ansi_version :3; /* ANSI Version */ | |
426 | unsigned reserved3_7 :1; /* AENC - Reserved */ | |
427 | unsigned reserved3_6 :1; /* TrmIOP - Reserved */ | |
428 | unsigned reserved3_45 :2; /* Reserved */ | |
429 | unsigned response_format :4; /* Response Data Format */ | |
430 | #else | |
431 | #error "Bitfield endianness not defined! Check your byteorder.h" | |
432 | #endif | |
433 | u8 additional_length; /* Additional Length (total_length-4) */ | |
434 | u8 rsv5, rsv6, rsv7; /* Reserved */ | |
435 | u8 vendor_id[8]; /* Vendor Identification */ | |
436 | u8 product_id[16]; /* Product Identification */ | |
437 | u8 revision_level[4]; /* Revision Level */ | |
438 | u8 vendor_specific[20]; /* Vendor Specific - Optional */ | |
439 | u8 reserved56t95[40]; /* Reserved - Optional */ | |
440 | /* Additional information may be returned */ | |
441 | } idefloppy_inquiry_result_t; | |
442 | ||
443 | /* | |
444 | * REQUEST SENSE packet command result - Data Format. | |
445 | */ | |
446 | typedef struct { | |
447 | #if defined(__LITTLE_ENDIAN_BITFIELD) | |
448 | unsigned error_code :7; /* Current error (0x70) */ | |
449 | unsigned valid :1; /* The information field conforms to SFF-8070i */ | |
450 | u8 reserved1 :8; /* Reserved */ | |
451 | unsigned sense_key :4; /* Sense Key */ | |
452 | unsigned reserved2_4 :1; /* Reserved */ | |
453 | unsigned ili :1; /* Incorrect Length Indicator */ | |
454 | unsigned reserved2_67 :2; | |
455 | #elif defined(__BIG_ENDIAN_BITFIELD) | |
456 | unsigned valid :1; /* The information field conforms to SFF-8070i */ | |
457 | unsigned error_code :7; /* Current error (0x70) */ | |
458 | u8 reserved1 :8; /* Reserved */ | |
459 | unsigned reserved2_67 :2; | |
460 | unsigned ili :1; /* Incorrect Length Indicator */ | |
461 | unsigned reserved2_4 :1; /* Reserved */ | |
462 | unsigned sense_key :4; /* Sense Key */ | |
463 | #else | |
464 | #error "Bitfield endianness not defined! Check your byteorder.h" | |
465 | #endif | |
466 | u32 information __attribute__ ((packed)); | |
467 | u8 asl; /* Additional sense length (n-7) */ | |
468 | u32 command_specific; /* Additional command specific information */ | |
469 | u8 asc; /* Additional Sense Code */ | |
470 | u8 ascq; /* Additional Sense Code Qualifier */ | |
471 | u8 replaceable_unit_code; /* Field Replaceable Unit Code */ | |
472 | u8 sksv[3]; | |
473 | u8 pad[2]; /* Padding to 20 bytes */ | |
474 | } idefloppy_request_sense_result_t; | |
475 | ||
476 | /* | |
477 | * Pages of the SELECT SENSE / MODE SENSE packet commands. | |
478 | */ | |
479 | #define IDEFLOPPY_CAPABILITIES_PAGE 0x1b | |
480 | #define IDEFLOPPY_FLEXIBLE_DISK_PAGE 0x05 | |
481 | ||
482 | /* | |
483 | * Mode Parameter Header for the MODE SENSE packet command | |
484 | */ | |
485 | typedef struct { | |
486 | u16 mode_data_length; /* Length of the following data transfer */ | |
487 | u8 medium_type; /* Medium Type */ | |
488 | #if defined(__LITTLE_ENDIAN_BITFIELD) | |
489 | unsigned reserved3 :7; | |
490 | unsigned wp :1; /* Write protect */ | |
491 | #elif defined(__BIG_ENDIAN_BITFIELD) | |
492 | unsigned wp :1; /* Write protect */ | |
493 | unsigned reserved3 :7; | |
494 | #else | |
495 | #error "Bitfield endianness not defined! Check your byteorder.h" | |
496 | #endif | |
497 | u8 reserved[4]; | |
498 | } idefloppy_mode_parameter_header_t; | |
499 | ||
cf8b8975 | 500 | static DEFINE_MUTEX(idefloppy_ref_mutex); |
1da177e4 LT |
501 | |
502 | #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref) | |
503 | ||
504 | #define ide_floppy_g(disk) \ | |
505 | container_of((disk)->private_data, struct ide_floppy_obj, driver) | |
506 | ||
507 | static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk) | |
508 | { | |
509 | struct ide_floppy_obj *floppy = NULL; | |
510 | ||
cf8b8975 | 511 | mutex_lock(&idefloppy_ref_mutex); |
1da177e4 LT |
512 | floppy = ide_floppy_g(disk); |
513 | if (floppy) | |
514 | kref_get(&floppy->kref); | |
cf8b8975 | 515 | mutex_unlock(&idefloppy_ref_mutex); |
1da177e4 LT |
516 | return floppy; |
517 | } | |
518 | ||
519 | static void ide_floppy_release(struct kref *); | |
520 | ||
521 | static void ide_floppy_put(struct ide_floppy_obj *floppy) | |
522 | { | |
cf8b8975 | 523 | mutex_lock(&idefloppy_ref_mutex); |
1da177e4 | 524 | kref_put(&floppy->kref, ide_floppy_release); |
cf8b8975 | 525 | mutex_unlock(&idefloppy_ref_mutex); |
1da177e4 LT |
526 | } |
527 | ||
528 | /* | |
529 | * Too bad. The drive wants to send us data which we are not ready to accept. | |
530 | * Just throw it away. | |
531 | */ | |
532 | static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount) | |
533 | { | |
534 | while (bcount--) | |
535 | (void) HWIF(drive)->INB(IDE_DATA_REG); | |
536 | } | |
537 | ||
538 | #if IDEFLOPPY_DEBUG_BUGS | |
539 | static void idefloppy_write_zeros (ide_drive_t *drive, unsigned int bcount) | |
540 | { | |
541 | while (bcount--) | |
542 | HWIF(drive)->OUTB(0, IDE_DATA_REG); | |
543 | } | |
544 | #endif /* IDEFLOPPY_DEBUG_BUGS */ | |
545 | ||
546 | ||
547 | /* | |
548 | * idefloppy_do_end_request is used to finish servicing a request. | |
549 | * | |
550 | * For read/write requests, we will call ide_end_request to pass to the | |
551 | * next buffer. | |
552 | */ | |
553 | static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs) | |
554 | { | |
555 | idefloppy_floppy_t *floppy = drive->driver_data; | |
556 | struct request *rq = HWGROUP(drive)->rq; | |
557 | int error; | |
558 | ||
559 | debug_log(KERN_INFO "Reached idefloppy_end_request\n"); | |
560 | ||
561 | switch (uptodate) { | |
562 | case 0: error = IDEFLOPPY_ERROR_GENERAL; break; | |
563 | case 1: error = 0; break; | |
564 | default: error = uptodate; | |
565 | } | |
566 | if (error) | |
567 | floppy->failed_pc = NULL; | |
568 | /* Why does this happen? */ | |
569 | if (!rq) | |
570 | return 0; | |
4aff5e23 | 571 | if (!blk_special_request(rq)) { |
1da177e4 LT |
572 | /* our real local end request function */ |
573 | ide_end_request(drive, uptodate, nsecs); | |
574 | return 0; | |
575 | } | |
576 | rq->errors = error; | |
577 | /* fixme: need to move this local also */ | |
578 | ide_end_drive_cmd(drive, 0, 0); | |
579 | return 0; | |
580 | } | |
581 | ||
582 | static void idefloppy_input_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount) | |
583 | { | |
584 | struct request *rq = pc->rq; | |
585 | struct bio_vec *bvec; | |
5705f702 | 586 | struct req_iterator iter; |
1da177e4 LT |
587 | unsigned long flags; |
588 | char *data; | |
5705f702 | 589 | int count, done = 0; |
1da177e4 | 590 | |
5705f702 | 591 | rq_for_each_segment(bvec, rq, iter) { |
6c92e699 JA |
592 | if (!bcount) |
593 | break; | |
1da177e4 | 594 | |
6c92e699 | 595 | count = min(bvec->bv_len, bcount); |
1da177e4 | 596 | |
6c92e699 JA |
597 | data = bvec_kmap_irq(bvec, &flags); |
598 | drive->hwif->atapi_input_bytes(drive, data, count); | |
599 | bvec_kunmap_irq(data, &flags); | |
1da177e4 | 600 | |
6c92e699 JA |
601 | bcount -= count; |
602 | pc->b_count += count; | |
603 | done += count; | |
1da177e4 LT |
604 | } |
605 | ||
606 | idefloppy_do_end_request(drive, 1, done >> 9); | |
607 | ||
608 | if (bcount) { | |
609 | printk(KERN_ERR "%s: leftover data in idefloppy_input_buffers, bcount == %d\n", drive->name, bcount); | |
610 | idefloppy_discard_data(drive, bcount); | |
611 | } | |
612 | } | |
613 | ||
614 | static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount) | |
615 | { | |
616 | struct request *rq = pc->rq; | |
5705f702 | 617 | struct req_iterator iter; |
1da177e4 LT |
618 | struct bio_vec *bvec; |
619 | unsigned long flags; | |
5705f702 | 620 | int count, done = 0; |
1da177e4 LT |
621 | char *data; |
622 | ||
5705f702 | 623 | rq_for_each_segment(bvec, rq, iter) { |
6c92e699 JA |
624 | if (!bcount) |
625 | break; | |
1da177e4 | 626 | |
6c92e699 | 627 | count = min(bvec->bv_len, bcount); |
1da177e4 | 628 | |
6c92e699 JA |
629 | data = bvec_kmap_irq(bvec, &flags); |
630 | drive->hwif->atapi_output_bytes(drive, data, count); | |
631 | bvec_kunmap_irq(data, &flags); | |
1da177e4 | 632 | |
6c92e699 JA |
633 | bcount -= count; |
634 | pc->b_count += count; | |
635 | done += count; | |
1da177e4 LT |
636 | } |
637 | ||
638 | idefloppy_do_end_request(drive, 1, done >> 9); | |
639 | ||
c7ea4b31 | 640 | #if IDEFLOPPY_DEBUG_BUGS |
1da177e4 LT |
641 | if (bcount) { |
642 | printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount); | |
643 | idefloppy_write_zeros(drive, bcount); | |
644 | } | |
c7ea4b31 | 645 | #endif |
1da177e4 LT |
646 | } |
647 | ||
648 | static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc) | |
649 | { | |
650 | struct request *rq = pc->rq; | |
651 | struct bio *bio = rq->bio; | |
652 | ||
653 | while ((bio = rq->bio) != NULL) | |
654 | idefloppy_do_end_request(drive, 1, 0); | |
655 | } | |
656 | ||
657 | /* | |
658 | * idefloppy_queue_pc_head generates a new packet command request in front | |
659 | * of the request queue, before the current request, so that it will be | |
660 | * processed immediately, on the next pass through the driver. | |
661 | */ | |
662 | static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq) | |
663 | { | |
664 | struct ide_floppy_obj *floppy = drive->driver_data; | |
665 | ||
666 | ide_init_drive_cmd(rq); | |
667 | rq->buffer = (char *) pc; | |
4aff5e23 | 668 | rq->cmd_type = REQ_TYPE_SPECIAL; |
1da177e4 LT |
669 | rq->rq_disk = floppy->disk; |
670 | (void) ide_do_drive_cmd(drive, rq, ide_preempt); | |
671 | } | |
672 | ||
673 | static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive) | |
674 | { | |
675 | idefloppy_floppy_t *floppy = drive->driver_data; | |
676 | ||
677 | if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK) | |
678 | floppy->pc_stack_index=0; | |
679 | return (&floppy->pc_stack[floppy->pc_stack_index++]); | |
680 | } | |
681 | ||
682 | static struct request *idefloppy_next_rq_storage (ide_drive_t *drive) | |
683 | { | |
684 | idefloppy_floppy_t *floppy = drive->driver_data; | |
685 | ||
686 | if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK) | |
687 | floppy->rq_stack_index = 0; | |
688 | return (&floppy->rq_stack[floppy->rq_stack_index++]); | |
689 | } | |
690 | ||
691 | /* | |
692 | * idefloppy_analyze_error is called on each failed packet command retry | |
693 | * to analyze the request sense. | |
694 | */ | |
695 | static void idefloppy_analyze_error (ide_drive_t *drive,idefloppy_request_sense_result_t *result) | |
696 | { | |
697 | idefloppy_floppy_t *floppy = drive->driver_data; | |
698 | ||
699 | floppy->sense_key = result->sense_key; | |
700 | floppy->asc = result->asc; | |
701 | floppy->ascq = result->ascq; | |
702 | floppy->progress_indication = result->sksv[0] & 0x80 ? | |
703 | (u16)get_unaligned((u16 *)(result->sksv+1)):0x10000; | |
704 | if (floppy->failed_pc) | |
705 | debug_log(KERN_INFO "ide-floppy: pc = %x, sense key = %x, " | |
706 | "asc = %x, ascq = %x\n", floppy->failed_pc->c[0], | |
707 | result->sense_key, result->asc, result->ascq); | |
708 | else | |
709 | debug_log(KERN_INFO "ide-floppy: sense key = %x, asc = %x, " | |
710 | "ascq = %x\n", result->sense_key, | |
711 | result->asc, result->ascq); | |
712 | } | |
713 | ||
714 | static void idefloppy_request_sense_callback (ide_drive_t *drive) | |
715 | { | |
716 | idefloppy_floppy_t *floppy = drive->driver_data; | |
717 | ||
718 | debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__); | |
719 | ||
720 | if (!floppy->pc->error) { | |
721 | idefloppy_analyze_error(drive,(idefloppy_request_sense_result_t *) floppy->pc->buffer); | |
722 | idefloppy_do_end_request(drive, 1, 0); | |
723 | } else { | |
724 | printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting request!\n"); | |
725 | idefloppy_do_end_request(drive, 0, 0); | |
726 | } | |
727 | } | |
728 | ||
729 | /* | |
730 | * General packet command callback function. | |
731 | */ | |
732 | static void idefloppy_pc_callback (ide_drive_t *drive) | |
733 | { | |
734 | idefloppy_floppy_t *floppy = drive->driver_data; | |
735 | ||
736 | debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__); | |
737 | ||
738 | idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0); | |
739 | } | |
740 | ||
741 | /* | |
742 | * idefloppy_init_pc initializes a packet command. | |
743 | */ | |
744 | static void idefloppy_init_pc (idefloppy_pc_t *pc) | |
745 | { | |
746 | memset(pc->c, 0, 12); | |
747 | pc->retries = 0; | |
748 | pc->flags = 0; | |
749 | pc->request_transfer = 0; | |
750 | pc->buffer = pc->pc_buffer; | |
751 | pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE; | |
752 | pc->callback = &idefloppy_pc_callback; | |
753 | } | |
754 | ||
755 | static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc) | |
756 | { | |
757 | idefloppy_init_pc(pc); | |
758 | pc->c[0] = IDEFLOPPY_REQUEST_SENSE_CMD; | |
759 | pc->c[4] = 255; | |
760 | pc->request_transfer = 18; | |
761 | pc->callback = &idefloppy_request_sense_callback; | |
762 | } | |
763 | ||
764 | /* | |
765 | * idefloppy_retry_pc is called when an error was detected during the | |
766 | * last packet command. We queue a request sense packet command in | |
767 | * the head of the request list. | |
768 | */ | |
769 | static void idefloppy_retry_pc (ide_drive_t *drive) | |
770 | { | |
771 | idefloppy_pc_t *pc; | |
772 | struct request *rq; | |
1da177e4 | 773 | |
0e38a66a | 774 | (void)drive->hwif->INB(IDE_ERROR_REG); |
1da177e4 LT |
775 | pc = idefloppy_next_pc_storage(drive); |
776 | rq = idefloppy_next_rq_storage(drive); | |
777 | idefloppy_create_request_sense_cmd(pc); | |
778 | idefloppy_queue_pc_head(drive, pc, rq); | |
779 | } | |
780 | ||
781 | /* | |
782 | * idefloppy_pc_intr is the usual interrupt handler which will be called | |
783 | * during a packet command. | |
784 | */ | |
785 | static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive) | |
786 | { | |
787 | idefloppy_floppy_t *floppy = drive->driver_data; | |
790d1239 | 788 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 LT |
789 | idefloppy_pc_t *pc = floppy->pc; |
790 | struct request *rq = pc->rq; | |
791 | unsigned int temp; | |
790d1239 | 792 | u16 bcount; |
8e7657ae | 793 | u8 stat, ireason; |
1da177e4 LT |
794 | |
795 | debug_log(KERN_INFO "ide-floppy: Reached %s interrupt handler\n", | |
796 | __FUNCTION__); | |
797 | ||
798 | if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) { | |
799 | if (HWIF(drive)->ide_dma_end(drive)) { | |
800 | set_bit(PC_DMA_ERROR, &pc->flags); | |
801 | } else { | |
802 | pc->actually_transferred = pc->request_transfer; | |
803 | idefloppy_update_buffers(drive, pc); | |
804 | } | |
805 | debug_log(KERN_INFO "ide-floppy: DMA finished\n"); | |
806 | } | |
807 | ||
808 | /* Clear the interrupt */ | |
22c525b9 | 809 | stat = drive->hwif->INB(IDE_STATUS_REG); |
1da177e4 | 810 | |
22c525b9 | 811 | if ((stat & DRQ_STAT) == 0) { /* No more interrupts */ |
1da177e4 LT |
812 | debug_log(KERN_INFO "Packet command completed, %d bytes " |
813 | "transferred\n", pc->actually_transferred); | |
814 | clear_bit(PC_DMA_IN_PROGRESS, &pc->flags); | |
815 | ||
366c7f55 | 816 | local_irq_enable_in_hardirq(); |
1da177e4 | 817 | |
22c525b9 | 818 | if ((stat & ERR_STAT) || test_bit(PC_DMA_ERROR, &pc->flags)) { |
1da177e4 LT |
819 | /* Error detected */ |
820 | debug_log(KERN_INFO "ide-floppy: %s: I/O error\n", | |
821 | drive->name); | |
822 | rq->errors++; | |
823 | if (pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) { | |
824 | printk(KERN_ERR "ide-floppy: I/O error in " | |
825 | "request sense command\n"); | |
826 | return ide_do_reset(drive); | |
827 | } | |
828 | /* Retry operation */ | |
829 | idefloppy_retry_pc(drive); | |
830 | /* queued, but not started */ | |
831 | return ide_stopped; | |
832 | } | |
833 | pc->error = 0; | |
834 | if (floppy->failed_pc == pc) | |
835 | floppy->failed_pc = NULL; | |
836 | /* Command finished - Call the callback function */ | |
837 | pc->callback(drive); | |
838 | return ide_stopped; | |
839 | } | |
840 | ||
841 | if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) { | |
842 | printk(KERN_ERR "ide-floppy: The floppy wants to issue " | |
843 | "more interrupts in DMA mode\n"); | |
7469aaf6 | 844 | ide_dma_off(drive); |
1da177e4 LT |
845 | return ide_do_reset(drive); |
846 | } | |
847 | ||
848 | /* Get the number of bytes to transfer */ | |
790d1239 BZ |
849 | bcount = (hwif->INB(IDE_BCOUNTH_REG) << 8) | |
850 | hwif->INB(IDE_BCOUNTL_REG); | |
1da177e4 | 851 | /* on this interrupt */ |
8e7657ae | 852 | ireason = hwif->INB(IDE_IREASON_REG); |
1da177e4 | 853 | |
8e7657ae | 854 | if (ireason & CD) { |
1da177e4 LT |
855 | printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n"); |
856 | return ide_do_reset(drive); | |
857 | } | |
8e7657ae | 858 | if (((ireason & IO) == IO) == test_bit(PC_WRITING, &pc->flags)) { |
1da177e4 LT |
859 | /* Hopefully, we will never get here */ |
860 | printk(KERN_ERR "ide-floppy: We wanted to %s, ", | |
8e7657ae | 861 | (ireason & IO) ? "Write" : "Read"); |
1da177e4 | 862 | printk(KERN_ERR "but the floppy wants us to %s !\n", |
8e7657ae | 863 | (ireason & IO) ? "Read" : "Write"); |
1da177e4 LT |
864 | return ide_do_reset(drive); |
865 | } | |
866 | if (!test_bit(PC_WRITING, &pc->flags)) { | |
867 | /* Reading - Check that we have enough space */ | |
790d1239 | 868 | temp = pc->actually_transferred + bcount; |
1da177e4 LT |
869 | if (temp > pc->request_transfer) { |
870 | if (temp > pc->buffer_size) { | |
871 | printk(KERN_ERR "ide-floppy: The floppy wants " | |
872 | "to send us more data than expected " | |
873 | "- discarding data\n"); | |
790d1239 | 874 | idefloppy_discard_data(drive, bcount); |
125e1874 | 875 | BUG_ON(HWGROUP(drive)->handler != NULL); |
1da177e4 LT |
876 | ide_set_handler(drive, |
877 | &idefloppy_pc_intr, | |
878 | IDEFLOPPY_WAIT_CMD, | |
879 | NULL); | |
880 | return ide_started; | |
881 | } | |
882 | debug_log(KERN_NOTICE "ide-floppy: The floppy wants to " | |
883 | "send us more data than expected - " | |
884 | "allowing transfer\n"); | |
885 | } | |
886 | } | |
887 | if (test_bit(PC_WRITING, &pc->flags)) { | |
888 | if (pc->buffer != NULL) | |
889 | /* Write the current buffer */ | |
790d1239 BZ |
890 | hwif->atapi_output_bytes(drive, pc->current_position, |
891 | bcount); | |
1da177e4 | 892 | else |
790d1239 | 893 | idefloppy_output_buffers(drive, pc, bcount); |
1da177e4 LT |
894 | } else { |
895 | if (pc->buffer != NULL) | |
896 | /* Read the current buffer */ | |
790d1239 BZ |
897 | hwif->atapi_input_bytes(drive, pc->current_position, |
898 | bcount); | |
1da177e4 | 899 | else |
790d1239 | 900 | idefloppy_input_buffers(drive, pc, bcount); |
1da177e4 LT |
901 | } |
902 | /* Update the current position */ | |
790d1239 BZ |
903 | pc->actually_transferred += bcount; |
904 | pc->current_position += bcount; | |
1da177e4 | 905 | |
125e1874 | 906 | BUG_ON(HWGROUP(drive)->handler != NULL); |
1da177e4 LT |
907 | ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); /* And set the interrupt handler again */ |
908 | return ide_started; | |
909 | } | |
910 | ||
911 | /* | |
912 | * This is the original routine that did the packet transfer. | |
913 | * It fails at high speeds on the Iomega ZIP drive, so there's a slower version | |
914 | * for that drive below. The algorithm is chosen based on drive type | |
915 | */ | |
916 | static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive) | |
917 | { | |
918 | ide_startstop_t startstop; | |
919 | idefloppy_floppy_t *floppy = drive->driver_data; | |
8e7657ae | 920 | u8 ireason; |
1da177e4 LT |
921 | |
922 | if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) { | |
923 | printk(KERN_ERR "ide-floppy: Strange, packet command " | |
924 | "initiated yet DRQ isn't asserted\n"); | |
925 | return startstop; | |
926 | } | |
8e7657ae BZ |
927 | ireason = drive->hwif->INB(IDE_IREASON_REG); |
928 | if ((ireason & CD) == 0 || (ireason & IO)) { | |
1da177e4 LT |
929 | printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while " |
930 | "issuing a packet command\n"); | |
931 | return ide_do_reset(drive); | |
932 | } | |
125e1874 | 933 | BUG_ON(HWGROUP(drive)->handler != NULL); |
1da177e4 LT |
934 | /* Set the interrupt routine */ |
935 | ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); | |
936 | /* Send the actual packet */ | |
937 | HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12); | |
938 | return ide_started; | |
939 | } | |
940 | ||
941 | ||
942 | /* | |
943 | * What we have here is a classic case of a top half / bottom half | |
944 | * interrupt service routine. In interrupt mode, the device sends | |
945 | * an interrupt to signal it's ready to receive a packet. However, | |
946 | * we need to delay about 2-3 ticks before issuing the packet or we | |
947 | * gets in trouble. | |
948 | * | |
949 | * So, follow carefully. transfer_pc1 is called as an interrupt (or | |
950 | * directly). In either case, when the device says it's ready for a | |
951 | * packet, we schedule the packet transfer to occur about 2-3 ticks | |
952 | * later in transfer_pc2. | |
953 | */ | |
954 | static int idefloppy_transfer_pc2 (ide_drive_t *drive) | |
955 | { | |
956 | idefloppy_floppy_t *floppy = drive->driver_data; | |
957 | ||
958 | /* Send the actual packet */ | |
959 | HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12); | |
960 | /* Timeout for the packet command */ | |
961 | return IDEFLOPPY_WAIT_CMD; | |
962 | } | |
963 | ||
964 | static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive) | |
965 | { | |
966 | idefloppy_floppy_t *floppy = drive->driver_data; | |
967 | ide_startstop_t startstop; | |
8e7657ae | 968 | u8 ireason; |
1da177e4 LT |
969 | |
970 | if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) { | |
971 | printk(KERN_ERR "ide-floppy: Strange, packet command " | |
972 | "initiated yet DRQ isn't asserted\n"); | |
973 | return startstop; | |
974 | } | |
8e7657ae BZ |
975 | ireason = drive->hwif->INB(IDE_IREASON_REG); |
976 | if ((ireason & CD) == 0 || (ireason & IO)) { | |
1da177e4 LT |
977 | printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) " |
978 | "while issuing a packet command\n"); | |
979 | return ide_do_reset(drive); | |
980 | } | |
981 | /* | |
982 | * The following delay solves a problem with ATAPI Zip 100 drives | |
983 | * where the Busy flag was apparently being deasserted before the | |
984 | * unit was ready to receive data. This was happening on a | |
985 | * 1200 MHz Athlon system. 10/26/01 25msec is too short, | |
986 | * 40 and 50msec work well. idefloppy_pc_intr will not be actually | |
987 | * used until after the packet is moved in about 50 msec. | |
988 | */ | |
125e1874 | 989 | BUG_ON(HWGROUP(drive)->handler != NULL); |
1da177e4 LT |
990 | ide_set_handler(drive, |
991 | &idefloppy_pc_intr, /* service routine for packet command */ | |
992 | floppy->ticks, /* wait this long before "failing" */ | |
993 | &idefloppy_transfer_pc2); /* fail == transfer_pc2 */ | |
994 | return ide_started; | |
995 | } | |
996 | ||
997 | /** | |
998 | * idefloppy_should_report_error() | |
999 | * | |
1000 | * Supresses error messages resulting from Medium not present | |
1001 | */ | |
1002 | static inline int idefloppy_should_report_error(idefloppy_floppy_t *floppy) | |
1003 | { | |
1004 | if (floppy->sense_key == 0x02 && | |
1005 | floppy->asc == 0x3a && | |
1006 | floppy->ascq == 0x00) | |
1007 | return 0; | |
1008 | return 1; | |
1009 | } | |
1010 | ||
1011 | /* | |
1012 | * Issue a packet command | |
1013 | */ | |
1014 | static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc) | |
1015 | { | |
1016 | idefloppy_floppy_t *floppy = drive->driver_data; | |
1017 | ide_hwif_t *hwif = drive->hwif; | |
1da177e4 | 1018 | ide_handler_t *pkt_xfer_routine; |
790d1239 | 1019 | u16 bcount; |
e5f9f5a8 | 1020 | u8 dma; |
1da177e4 | 1021 | |
1da177e4 LT |
1022 | if (floppy->failed_pc == NULL && |
1023 | pc->c[0] != IDEFLOPPY_REQUEST_SENSE_CMD) | |
1024 | floppy->failed_pc = pc; | |
1025 | /* Set the current packet command */ | |
1026 | floppy->pc = pc; | |
1027 | ||
1028 | if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES || | |
1029 | test_bit(PC_ABORT, &pc->flags)) { | |
1030 | /* | |
1031 | * We will "abort" retrying a packet command in case | |
1032 | * a legitimate error code was received. | |
1033 | */ | |
1034 | if (!test_bit(PC_ABORT, &pc->flags)) { | |
1035 | if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags)) { | |
1036 | if (idefloppy_should_report_error(floppy)) | |
1037 | printk(KERN_ERR "ide-floppy: %s: I/O error, " | |
1038 | "pc = %2x, key = %2x, " | |
1039 | "asc = %2x, ascq = %2x\n", | |
1040 | drive->name, pc->c[0], | |
1041 | floppy->sense_key, | |
1042 | floppy->asc, floppy->ascq); | |
1043 | } | |
1044 | /* Giving up */ | |
1045 | pc->error = IDEFLOPPY_ERROR_GENERAL; | |
1046 | } | |
1047 | floppy->failed_pc = NULL; | |
1048 | pc->callback(drive); | |
1049 | return ide_stopped; | |
1050 | } | |
1051 | ||
1052 | debug_log(KERN_INFO "Retry number - %d\n",pc->retries); | |
1053 | ||
1054 | pc->retries++; | |
1055 | /* We haven't transferred any data yet */ | |
1056 | pc->actually_transferred = 0; | |
1057 | pc->current_position = pc->buffer; | |
790d1239 | 1058 | bcount = min(pc->request_transfer, 63 * 1024); |
1da177e4 | 1059 | |
7469aaf6 BZ |
1060 | if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags)) |
1061 | ide_dma_off(drive); | |
1062 | ||
e5f9f5a8 | 1063 | dma = 0; |
1da177e4 LT |
1064 | |
1065 | if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma) | |
e5f9f5a8 | 1066 | dma = !hwif->dma_setup(drive); |
1da177e4 | 1067 | |
2fc57388 BZ |
1068 | ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK | |
1069 | IDE_TFLAG_OUT_DEVICE, bcount, dma); | |
1da177e4 | 1070 | |
e5f9f5a8 | 1071 | if (dma) { /* Begin DMA, if necessary */ |
1da177e4 LT |
1072 | set_bit(PC_DMA_IN_PROGRESS, &pc->flags); |
1073 | hwif->dma_start(drive); | |
1074 | } | |
1075 | ||
1076 | /* Can we transfer the packet when we get the interrupt or wait? */ | |
1077 | if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) { | |
1078 | /* wait */ | |
1079 | pkt_xfer_routine = &idefloppy_transfer_pc1; | |
1080 | } else { | |
1081 | /* immediate */ | |
1082 | pkt_xfer_routine = &idefloppy_transfer_pc; | |
1083 | } | |
1084 | ||
1085 | if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) { | |
1086 | /* Issue the packet command */ | |
1087 | ide_execute_command(drive, WIN_PACKETCMD, | |
1088 | pkt_xfer_routine, | |
1089 | IDEFLOPPY_WAIT_CMD, | |
1090 | NULL); | |
1091 | return ide_started; | |
1092 | } else { | |
1093 | /* Issue the packet command */ | |
1094 | HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG); | |
1095 | return (*pkt_xfer_routine) (drive); | |
1096 | } | |
1097 | } | |
1098 | ||
1099 | static void idefloppy_rw_callback (ide_drive_t *drive) | |
1100 | { | |
1101 | debug_log(KERN_INFO "ide-floppy: Reached idefloppy_rw_callback\n"); | |
1102 | ||
1103 | idefloppy_do_end_request(drive, 1, 0); | |
1104 | return; | |
1105 | } | |
1106 | ||
1107 | static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent) | |
1108 | { | |
1109 | debug_log(KERN_INFO "ide-floppy: creating prevent removal command, " | |
1110 | "prevent = %d\n", prevent); | |
1111 | ||
1112 | idefloppy_init_pc(pc); | |
1113 | pc->c[0] = IDEFLOPPY_PREVENT_REMOVAL_CMD; | |
1114 | pc->c[4] = prevent; | |
1115 | } | |
1116 | ||
1117 | static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc) | |
1118 | { | |
1119 | idefloppy_init_pc(pc); | |
1120 | pc->c[0] = IDEFLOPPY_READ_CAPACITY_CMD; | |
1121 | pc->c[7] = 255; | |
1122 | pc->c[8] = 255; | |
1123 | pc->request_transfer = 255; | |
1124 | } | |
1125 | ||
1126 | static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l, | |
1127 | int flags) | |
1128 | { | |
1129 | idefloppy_init_pc(pc); | |
1130 | pc->c[0] = IDEFLOPPY_FORMAT_UNIT_CMD; | |
1131 | pc->c[1] = 0x17; | |
1132 | ||
1133 | memset(pc->buffer, 0, 12); | |
1134 | pc->buffer[1] = 0xA2; | |
1135 | /* Default format list header, u8 1: FOV/DCRT/IMM bits set */ | |
1136 | ||
1137 | if (flags & 1) /* Verify bit on... */ | |
1138 | pc->buffer[1] ^= 0x20; /* ... turn off DCRT bit */ | |
1139 | pc->buffer[3] = 8; | |
1140 | ||
1141 | put_unaligned(htonl(b), (unsigned int *)(&pc->buffer[4])); | |
1142 | put_unaligned(htonl(l), (unsigned int *)(&pc->buffer[8])); | |
1143 | pc->buffer_size=12; | |
1144 | set_bit(PC_WRITING, &pc->flags); | |
1145 | } | |
1146 | ||
1147 | /* | |
1148 | * A mode sense command is used to "sense" floppy parameters. | |
1149 | */ | |
1150 | static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type) | |
1151 | { | |
1152 | u16 length = sizeof(idefloppy_mode_parameter_header_t); | |
1153 | ||
1154 | idefloppy_init_pc(pc); | |
1155 | pc->c[0] = IDEFLOPPY_MODE_SENSE_CMD; | |
1156 | pc->c[1] = 0; | |
1157 | pc->c[2] = page_code + (type << 6); | |
1158 | ||
1159 | switch (page_code) { | |
1160 | case IDEFLOPPY_CAPABILITIES_PAGE: | |
1161 | length += 12; | |
1162 | break; | |
1163 | case IDEFLOPPY_FLEXIBLE_DISK_PAGE: | |
1164 | length += 32; | |
1165 | break; | |
1166 | default: | |
1167 | printk(KERN_ERR "ide-floppy: unsupported page code " | |
1168 | "in create_mode_sense_cmd\n"); | |
1169 | } | |
1170 | put_unaligned(htons(length), (u16 *) &pc->c[7]); | |
1171 | pc->request_transfer = length; | |
1172 | } | |
1173 | ||
1174 | static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start) | |
1175 | { | |
1176 | idefloppy_init_pc(pc); | |
1177 | pc->c[0] = IDEFLOPPY_START_STOP_CMD; | |
1178 | pc->c[4] = start; | |
1179 | } | |
1180 | ||
1181 | static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc) | |
1182 | { | |
1183 | idefloppy_init_pc(pc); | |
1184 | pc->c[0] = IDEFLOPPY_TEST_UNIT_READY_CMD; | |
1185 | } | |
1186 | ||
1187 | static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector) | |
1188 | { | |
1189 | int block = sector / floppy->bs_factor; | |
1190 | int blocks = rq->nr_sectors / floppy->bs_factor; | |
1191 | int cmd = rq_data_dir(rq); | |
1192 | ||
1193 | debug_log("create_rw1%d_cmd: block == %d, blocks == %d\n", | |
1194 | 2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags), | |
1195 | block, blocks); | |
1196 | ||
1197 | idefloppy_init_pc(pc); | |
1198 | if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) { | |
1199 | pc->c[0] = cmd == READ ? IDEFLOPPY_READ12_CMD : IDEFLOPPY_WRITE12_CMD; | |
1200 | put_unaligned(htonl(blocks), (unsigned int *) &pc->c[6]); | |
1201 | } else { | |
1202 | pc->c[0] = cmd == READ ? IDEFLOPPY_READ10_CMD : IDEFLOPPY_WRITE10_CMD; | |
1203 | put_unaligned(htons(blocks), (unsigned short *) &pc->c[7]); | |
1204 | } | |
1205 | put_unaligned(htonl(block), (unsigned int *) &pc->c[2]); | |
1206 | pc->callback = &idefloppy_rw_callback; | |
1207 | pc->rq = rq; | |
1208 | pc->b_count = cmd == READ ? 0 : rq->bio->bi_size; | |
4aff5e23 | 1209 | if (rq->cmd_flags & REQ_RW) |
1da177e4 LT |
1210 | set_bit(PC_WRITING, &pc->flags); |
1211 | pc->buffer = NULL; | |
1212 | pc->request_transfer = pc->buffer_size = blocks * floppy->block_size; | |
1213 | set_bit(PC_DMA_RECOMMENDED, &pc->flags); | |
1214 | } | |
1215 | ||
3d6392cf | 1216 | static void |
1da177e4 LT |
1217 | idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq) |
1218 | { | |
1da177e4 | 1219 | idefloppy_init_pc(pc); |
3d6392cf | 1220 | pc->callback = &idefloppy_rw_callback; |
1da177e4 | 1221 | memcpy(pc->c, rq->cmd, sizeof(pc->c)); |
3d6392cf JA |
1222 | pc->rq = rq; |
1223 | pc->b_count = rq->data_len; | |
1224 | if (rq->data_len && rq_data_dir(rq) == WRITE) | |
1225 | set_bit(PC_WRITING, &pc->flags); | |
1226 | pc->buffer = rq->data; | |
1227 | if (rq->bio) | |
1228 | set_bit(PC_DMA_RECOMMENDED, &pc->flags); | |
1229 | ||
1230 | /* | |
1231 | * possibly problematic, doesn't look like ide-floppy correctly | |
1232 | * handled scattered requests if dma fails... | |
1233 | */ | |
1234 | pc->request_transfer = pc->buffer_size = rq->data_len; | |
1da177e4 LT |
1235 | } |
1236 | ||
1237 | /* | |
1238 | * idefloppy_do_request is our request handling function. | |
1239 | */ | |
1240 | static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s) | |
1241 | { | |
1242 | idefloppy_floppy_t *floppy = drive->driver_data; | |
1243 | idefloppy_pc_t *pc; | |
1244 | unsigned long block = (unsigned long)block_s; | |
1245 | ||
cdd60262 | 1246 | debug_log(KERN_INFO "dev: %s, flags: %lx, errors: %d\n", |
18cddac3 | 1247 | rq->rq_disk ? rq->rq_disk->disk_name : "?", |
1da177e4 LT |
1248 | rq->flags, rq->errors); |
1249 | debug_log(KERN_INFO "sector: %ld, nr_sectors: %ld, " | |
1250 | "current_nr_sectors: %d\n", (long)rq->sector, | |
1251 | rq->nr_sectors, rq->current_nr_sectors); | |
1252 | ||
1253 | if (rq->errors >= ERROR_MAX) { | |
1254 | if (floppy->failed_pc != NULL) { | |
1255 | if (idefloppy_should_report_error(floppy)) | |
1256 | printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x," | |
1257 | " key = %2x, asc = %2x, ascq = %2x\n", | |
1258 | drive->name, floppy->failed_pc->c[0], | |
1259 | floppy->sense_key, floppy->asc, floppy->ascq); | |
1260 | } | |
1261 | else | |
1262 | printk(KERN_ERR "ide-floppy: %s: I/O error\n", | |
1263 | drive->name); | |
1264 | idefloppy_do_end_request(drive, 0, 0); | |
1265 | return ide_stopped; | |
1266 | } | |
4aff5e23 | 1267 | if (blk_fs_request(rq)) { |
1da177e4 LT |
1268 | if (((long)rq->sector % floppy->bs_factor) || |
1269 | (rq->nr_sectors % floppy->bs_factor)) { | |
1270 | printk("%s: unsupported r/w request size\n", | |
1271 | drive->name); | |
1272 | idefloppy_do_end_request(drive, 0, 0); | |
1273 | return ide_stopped; | |
1274 | } | |
1275 | pc = idefloppy_next_pc_storage(drive); | |
1276 | idefloppy_create_rw_cmd(floppy, pc, rq, block); | |
4aff5e23 | 1277 | } else if (blk_special_request(rq)) { |
1da177e4 | 1278 | pc = (idefloppy_pc_t *) rq->buffer; |
4aff5e23 | 1279 | } else if (blk_pc_request(rq)) { |
1da177e4 | 1280 | pc = idefloppy_next_pc_storage(drive); |
3d6392cf | 1281 | idefloppy_blockpc_cmd(floppy, pc, rq); |
1da177e4 LT |
1282 | } else { |
1283 | blk_dump_rq_flags(rq, | |
1284 | "ide-floppy: unsupported command in queue"); | |
1285 | idefloppy_do_end_request(drive, 0, 0); | |
1286 | return ide_stopped; | |
1287 | } | |
1288 | ||
1289 | pc->rq = rq; | |
1290 | return idefloppy_issue_pc(drive, pc); | |
1291 | } | |
1292 | ||
1293 | /* | |
1294 | * idefloppy_queue_pc_tail adds a special packet command request to the | |
1295 | * tail of the request queue, and waits for it to be serviced. | |
1296 | */ | |
1297 | static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc) | |
1298 | { | |
1299 | struct ide_floppy_obj *floppy = drive->driver_data; | |
1300 | struct request rq; | |
1301 | ||
1302 | ide_init_drive_cmd (&rq); | |
1303 | rq.buffer = (char *) pc; | |
4aff5e23 | 1304 | rq.cmd_type = REQ_TYPE_SPECIAL; |
1da177e4 LT |
1305 | rq.rq_disk = floppy->disk; |
1306 | ||
1307 | return ide_do_drive_cmd(drive, &rq, ide_wait); | |
1308 | } | |
1309 | ||
1310 | /* | |
1311 | * Look at the flexible disk page parameters. We will ignore the CHS | |
1312 | * capacity parameters and use the LBA parameters instead. | |
1313 | */ | |
1314 | static int idefloppy_get_flexible_disk_page (ide_drive_t *drive) | |
1315 | { | |
1316 | idefloppy_floppy_t *floppy = drive->driver_data; | |
1317 | idefloppy_pc_t pc; | |
1318 | idefloppy_mode_parameter_header_t *header; | |
1319 | idefloppy_flexible_disk_page_t *page; | |
1320 | int capacity, lba_capacity; | |
1321 | ||
1322 | idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, MODE_SENSE_CURRENT); | |
1323 | if (idefloppy_queue_pc_tail(drive,&pc)) { | |
1324 | printk(KERN_ERR "ide-floppy: Can't get flexible disk " | |
1325 | "page parameters\n"); | |
1326 | return 1; | |
1327 | } | |
1328 | header = (idefloppy_mode_parameter_header_t *) pc.buffer; | |
1329 | floppy->wp = header->wp; | |
1330 | set_disk_ro(floppy->disk, floppy->wp); | |
1331 | page = (idefloppy_flexible_disk_page_t *) (header + 1); | |
1332 | ||
1333 | page->transfer_rate = ntohs(page->transfer_rate); | |
1334 | page->sector_size = ntohs(page->sector_size); | |
1335 | page->cyls = ntohs(page->cyls); | |
1336 | page->rpm = ntohs(page->rpm); | |
1337 | capacity = page->cyls * page->heads * page->sectors * page->sector_size; | |
1338 | if (memcmp (page, &floppy->flexible_disk_page, sizeof (idefloppy_flexible_disk_page_t))) | |
1339 | printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, " | |
1340 | "%d sector size, %d rpm\n", | |
1341 | drive->name, capacity / 1024, page->cyls, | |
1342 | page->heads, page->sectors, | |
1343 | page->transfer_rate / 8, page->sector_size, page->rpm); | |
1344 | ||
1345 | floppy->flexible_disk_page = *page; | |
1346 | drive->bios_cyl = page->cyls; | |
1347 | drive->bios_head = page->heads; | |
1348 | drive->bios_sect = page->sectors; | |
1349 | lba_capacity = floppy->blocks * floppy->block_size; | |
1350 | if (capacity < lba_capacity) { | |
1351 | printk(KERN_NOTICE "%s: The disk reports a capacity of %d " | |
1352 | "bytes, but the drive only handles %d\n", | |
1353 | drive->name, lba_capacity, capacity); | |
1354 | floppy->blocks = floppy->block_size ? capacity / floppy->block_size : 0; | |
1355 | } | |
1356 | return 0; | |
1357 | } | |
1358 | ||
1359 | static int idefloppy_get_capability_page(ide_drive_t *drive) | |
1360 | { | |
1361 | idefloppy_floppy_t *floppy = drive->driver_data; | |
1362 | idefloppy_pc_t pc; | |
1363 | idefloppy_mode_parameter_header_t *header; | |
1364 | idefloppy_capabilities_page_t *page; | |
1365 | ||
1366 | floppy->srfp = 0; | |
1367 | idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE, | |
1368 | MODE_SENSE_CURRENT); | |
1369 | ||
1370 | set_bit(PC_SUPPRESS_ERROR, &pc.flags); | |
1371 | if (idefloppy_queue_pc_tail(drive,&pc)) { | |
1372 | return 1; | |
1373 | } | |
1374 | ||
1375 | header = (idefloppy_mode_parameter_header_t *) pc.buffer; | |
1376 | page= (idefloppy_capabilities_page_t *)(header+1); | |
1377 | floppy->srfp = page->srfp; | |
1378 | return (0); | |
1379 | } | |
1380 | ||
1381 | /* | |
1382 | * Determine if a media is present in the floppy drive, and if so, | |
1383 | * its LBA capacity. | |
1384 | */ | |
1385 | static int idefloppy_get_capacity (ide_drive_t *drive) | |
1386 | { | |
1387 | idefloppy_floppy_t *floppy = drive->driver_data; | |
1388 | idefloppy_pc_t pc; | |
1389 | idefloppy_capacity_header_t *header; | |
1390 | idefloppy_capacity_descriptor_t *descriptor; | |
1391 | int i, descriptors, rc = 1, blocks, length; | |
1392 | ||
1393 | drive->bios_cyl = 0; | |
1394 | drive->bios_head = drive->bios_sect = 0; | |
fdb77da4 AC |
1395 | floppy->blocks = 0; |
1396 | floppy->bs_factor = 1; | |
1da177e4 LT |
1397 | set_capacity(floppy->disk, 0); |
1398 | ||
1399 | idefloppy_create_read_capacity_cmd(&pc); | |
1400 | if (idefloppy_queue_pc_tail(drive, &pc)) { | |
1401 | printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); | |
1402 | return 1; | |
1403 | } | |
1404 | header = (idefloppy_capacity_header_t *) pc.buffer; | |
1405 | descriptors = header->length / sizeof(idefloppy_capacity_descriptor_t); | |
1406 | descriptor = (idefloppy_capacity_descriptor_t *) (header + 1); | |
1407 | ||
1408 | for (i = 0; i < descriptors; i++, descriptor++) { | |
1409 | blocks = descriptor->blocks = ntohl(descriptor->blocks); | |
1410 | length = descriptor->length = ntohs(descriptor->length); | |
1411 | ||
1412 | if (!i) | |
1413 | { | |
1414 | switch (descriptor->dc) { | |
1415 | /* Clik! drive returns this instead of CAPACITY_CURRENT */ | |
1416 | case CAPACITY_UNFORMATTED: | |
1417 | if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) | |
1418 | /* | |
1419 | * If it is not a clik drive, break out | |
1420 | * (maintains previous driver behaviour) | |
1421 | */ | |
1422 | break; | |
1423 | case CAPACITY_CURRENT: | |
1424 | /* Normal Zip/LS-120 disks */ | |
1425 | if (memcmp(descriptor, &floppy->capacity, sizeof (idefloppy_capacity_descriptor_t))) | |
1426 | printk(KERN_INFO "%s: %dkB, %d blocks, %d " | |
1427 | "sector size\n", drive->name, | |
1428 | blocks * length / 1024, blocks, length); | |
1429 | floppy->capacity = *descriptor; | |
1430 | if (!length || length % 512) { | |
1431 | printk(KERN_NOTICE "%s: %d bytes block size " | |
1432 | "not supported\n", drive->name, length); | |
1433 | } else { | |
1434 | floppy->blocks = blocks; | |
1435 | floppy->block_size = length; | |
1436 | if ((floppy->bs_factor = length / 512) != 1) | |
1437 | printk(KERN_NOTICE "%s: warning: non " | |
1438 | "512 bytes block size not " | |
1439 | "fully supported\n", | |
1440 | drive->name); | |
1441 | rc = 0; | |
1442 | } | |
1443 | break; | |
1444 | case CAPACITY_NO_CARTRIDGE: | |
1445 | /* | |
1446 | * This is a KERN_ERR so it appears on screen | |
1447 | * for the user to see | |
1448 | */ | |
1449 | printk(KERN_ERR "%s: No disk in drive\n", drive->name); | |
1450 | break; | |
1451 | case CAPACITY_INVALID: | |
1452 | printk(KERN_ERR "%s: Invalid capacity for disk " | |
1453 | "in drive\n", drive->name); | |
1454 | break; | |
1455 | } | |
1456 | } | |
1457 | if (!i) { | |
1458 | debug_log( "Descriptor 0 Code: %d\n", | |
1459 | descriptor->dc); | |
1460 | } | |
1461 | debug_log( "Descriptor %d: %dkB, %d blocks, %d " | |
1462 | "sector size\n", i, blocks * length / 1024, blocks, | |
1463 | length); | |
1464 | } | |
1465 | ||
1466 | /* Clik! disk does not support get_flexible_disk_page */ | |
1467 | if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { | |
1468 | (void) idefloppy_get_flexible_disk_page(drive); | |
1469 | } | |
1470 | ||
1471 | set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor); | |
1472 | return rc; | |
1473 | } | |
1474 | ||
1475 | /* | |
1476 | ** Obtain the list of formattable capacities. | |
1477 | ** Very similar to idefloppy_get_capacity, except that we push the capacity | |
1478 | ** descriptors to userland, instead of our own structures. | |
1479 | ** | |
1480 | ** Userland gives us the following structure: | |
1481 | ** | |
1482 | ** struct idefloppy_format_capacities { | |
1483 | ** int nformats; | |
1484 | ** struct { | |
1485 | ** int nblocks; | |
1486 | ** int blocksize; | |
1487 | ** } formats[]; | |
1488 | ** } ; | |
1489 | ** | |
1490 | ** userland initializes nformats to the number of allocated formats[] | |
1491 | ** records. On exit we set nformats to the number of records we've | |
1492 | ** actually initialized. | |
1493 | ** | |
1494 | */ | |
1495 | ||
1496 | static int idefloppy_get_format_capacities(ide_drive_t *drive, int __user *arg) | |
1497 | { | |
1498 | idefloppy_pc_t pc; | |
1499 | idefloppy_capacity_header_t *header; | |
1500 | idefloppy_capacity_descriptor_t *descriptor; | |
1501 | int i, descriptors, blocks, length; | |
1502 | int u_array_size; | |
1503 | int u_index; | |
1504 | int __user *argp; | |
1505 | ||
1506 | if (get_user(u_array_size, arg)) | |
1507 | return (-EFAULT); | |
1508 | ||
1509 | if (u_array_size <= 0) | |
1510 | return (-EINVAL); | |
1511 | ||
1512 | idefloppy_create_read_capacity_cmd(&pc); | |
1513 | if (idefloppy_queue_pc_tail(drive, &pc)) { | |
1514 | printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); | |
1515 | return (-EIO); | |
1516 | } | |
1517 | header = (idefloppy_capacity_header_t *) pc.buffer; | |
1518 | descriptors = header->length / | |
1519 | sizeof(idefloppy_capacity_descriptor_t); | |
1520 | descriptor = (idefloppy_capacity_descriptor_t *) (header + 1); | |
1521 | ||
1522 | u_index = 0; | |
1523 | argp = arg + 1; | |
1524 | ||
1525 | /* | |
1526 | ** We always skip the first capacity descriptor. That's the | |
1527 | ** current capacity. We are interested in the remaining descriptors, | |
1528 | ** the formattable capacities. | |
1529 | */ | |
1530 | ||
1531 | for (i=0; i<descriptors; i++, descriptor++) { | |
1532 | if (u_index >= u_array_size) | |
1533 | break; /* User-supplied buffer too small */ | |
1534 | if (i == 0) | |
1535 | continue; /* Skip the first descriptor */ | |
1536 | ||
1537 | blocks = ntohl(descriptor->blocks); | |
1538 | length = ntohs(descriptor->length); | |
1539 | ||
1540 | if (put_user(blocks, argp)) | |
1541 | return(-EFAULT); | |
1542 | ++argp; | |
1543 | ||
1544 | if (put_user(length, argp)) | |
1545 | return (-EFAULT); | |
1546 | ++argp; | |
1547 | ||
1548 | ++u_index; | |
1549 | } | |
1550 | ||
1551 | if (put_user(u_index, arg)) | |
1552 | return (-EFAULT); | |
1553 | return (0); | |
1554 | } | |
1555 | ||
1556 | /* | |
1557 | ** Send ATAPI_FORMAT_UNIT to the drive. | |
1558 | ** | |
1559 | ** Userland gives us the following structure: | |
1560 | ** | |
1561 | ** struct idefloppy_format_command { | |
1562 | ** int nblocks; | |
1563 | ** int blocksize; | |
1564 | ** int flags; | |
1565 | ** } ; | |
1566 | ** | |
1567 | ** flags is a bitmask, currently, the only defined flag is: | |
1568 | ** | |
1569 | ** 0x01 - verify media after format. | |
1570 | */ | |
1571 | ||
1572 | static int idefloppy_begin_format(ide_drive_t *drive, int __user *arg) | |
1573 | { | |
1574 | int blocks; | |
1575 | int length; | |
1576 | int flags; | |
1577 | idefloppy_pc_t pc; | |
1578 | ||
1579 | if (get_user(blocks, arg) || | |
1580 | get_user(length, arg+1) || | |
1581 | get_user(flags, arg+2)) { | |
1582 | return (-EFAULT); | |
1583 | } | |
1584 | ||
1585 | /* Get the SFRP bit */ | |
1586 | (void) idefloppy_get_capability_page(drive); | |
1587 | idefloppy_create_format_unit_cmd(&pc, blocks, length, flags); | |
1588 | if (idefloppy_queue_pc_tail(drive, &pc)) { | |
1589 | return (-EIO); | |
1590 | } | |
1591 | ||
1592 | return (0); | |
1593 | } | |
1594 | ||
1595 | /* | |
1596 | ** Get ATAPI_FORMAT_UNIT progress indication. | |
1597 | ** | |
0779bf2d | 1598 | ** Userland gives a pointer to an int. The int is set to a progress |
1da177e4 LT |
1599 | ** indicator 0-65536, with 65536=100%. |
1600 | ** | |
1601 | ** If the drive does not support format progress indication, we just check | |
1602 | ** the dsc bit, and return either 0 or 65536. | |
1603 | */ | |
1604 | ||
1605 | static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg) | |
1606 | { | |
1607 | idefloppy_floppy_t *floppy = drive->driver_data; | |
1608 | idefloppy_pc_t pc; | |
1609 | int progress_indication = 0x10000; | |
1610 | ||
1611 | if (floppy->srfp) { | |
1612 | idefloppy_create_request_sense_cmd(&pc); | |
1613 | if (idefloppy_queue_pc_tail(drive, &pc)) { | |
1614 | return (-EIO); | |
1615 | } | |
1616 | ||
1617 | if (floppy->sense_key == 2 && | |
1618 | floppy->asc == 4 && | |
1619 | floppy->ascq == 4) { | |
1620 | progress_indication = floppy->progress_indication; | |
1621 | } | |
1622 | /* Else assume format_unit has finished, and we're | |
1623 | ** at 0x10000 */ | |
1624 | } else { | |
1da177e4 | 1625 | unsigned long flags; |
22c525b9 | 1626 | u8 stat; |
1da177e4 LT |
1627 | |
1628 | local_irq_save(flags); | |
22c525b9 | 1629 | stat = drive->hwif->INB(IDE_STATUS_REG); |
1da177e4 LT |
1630 | local_irq_restore(flags); |
1631 | ||
22c525b9 | 1632 | progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000; |
1da177e4 LT |
1633 | } |
1634 | if (put_user(progress_indication, arg)) | |
1635 | return (-EFAULT); | |
1636 | ||
1637 | return (0); | |
1638 | } | |
1639 | ||
1640 | /* | |
1641 | * Return the current floppy capacity. | |
1642 | */ | |
1643 | static sector_t idefloppy_capacity (ide_drive_t *drive) | |
1644 | { | |
1645 | idefloppy_floppy_t *floppy = drive->driver_data; | |
1646 | unsigned long capacity = floppy->blocks * floppy->bs_factor; | |
1647 | ||
1648 | return capacity; | |
1649 | } | |
1650 | ||
1651 | /* | |
1652 | * idefloppy_identify_device checks if we can support a drive, | |
1653 | * based on the ATAPI IDENTIFY command results. | |
1654 | */ | |
1655 | static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id) | |
1656 | { | |
1657 | struct idefloppy_id_gcw gcw; | |
1658 | #if IDEFLOPPY_DEBUG_INFO | |
1da177e4 LT |
1659 | char buffer[80]; |
1660 | #endif /* IDEFLOPPY_DEBUG_INFO */ | |
1661 | ||
1662 | *((u16 *) &gcw) = id->config; | |
1663 | ||
1664 | #ifdef CONFIG_PPC | |
1665 | /* kludge for Apple PowerBook internal zip */ | |
1666 | if ((gcw.device_type == 5) && | |
1667 | !strstr(id->model, "CD-ROM") && | |
1668 | strstr(id->model, "ZIP")) | |
1669 | gcw.device_type = 0; | |
1670 | #endif | |
1671 | ||
1672 | #if IDEFLOPPY_DEBUG_INFO | |
1673 | printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n"); | |
1674 | switch (gcw.protocol) { | |
1675 | case 0: case 1: sprintf(buffer, "ATA");break; | |
1676 | case 2: sprintf(buffer, "ATAPI");break; | |
1677 | case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break; | |
1678 | } | |
1679 | printk(KERN_INFO "Protocol Type: %s\n", buffer); | |
1680 | switch (gcw.device_type) { | |
1681 | case 0: sprintf(buffer, "Direct-access Device");break; | |
1682 | case 1: sprintf(buffer, "Streaming Tape Device");break; | |
1683 | case 2: case 3: case 4: sprintf (buffer, "Reserved");break; | |
1684 | case 5: sprintf(buffer, "CD-ROM Device");break; | |
1685 | case 6: sprintf(buffer, "Reserved"); | |
1686 | case 7: sprintf(buffer, "Optical memory Device");break; | |
1687 | case 0x1f: sprintf(buffer, "Unknown or no Device type");break; | |
1688 | default: sprintf(buffer, "Reserved"); | |
1689 | } | |
1690 | printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer); | |
1691 | printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No"); | |
1692 | switch (gcw.drq_type) { | |
1693 | case 0: sprintf(buffer, "Microprocessor DRQ");break; | |
1694 | case 1: sprintf(buffer, "Interrupt DRQ");break; | |
1695 | case 2: sprintf(buffer, "Accelerated DRQ");break; | |
1696 | case 3: sprintf(buffer, "Reserved");break; | |
1697 | } | |
1698 | printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer); | |
1699 | switch (gcw.packet_size) { | |
1700 | case 0: sprintf(buffer, "12 bytes");break; | |
1701 | case 1: sprintf(buffer, "16 bytes");break; | |
1702 | default: sprintf(buffer, "Reserved");break; | |
1703 | } | |
1704 | printk(KERN_INFO "Command Packet Size: %s\n", buffer); | |
1da177e4 LT |
1705 | #endif /* IDEFLOPPY_DEBUG_INFO */ |
1706 | ||
1707 | if (gcw.protocol != 2) | |
1708 | printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n"); | |
1709 | else if (gcw.device_type != 0) | |
1710 | printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n"); | |
1711 | else if (!gcw.removable) | |
1712 | printk(KERN_ERR "ide-floppy: The removable flag is not set\n"); | |
1713 | else if (gcw.drq_type == 3) { | |
1714 | printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type); | |
1715 | } else if (gcw.packet_size != 0) { | |
1716 | printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n"); | |
1717 | } else | |
1718 | return 1; | |
1719 | return 0; | |
1720 | } | |
1721 | ||
7662d046 | 1722 | #ifdef CONFIG_IDE_PROC_FS |
1da177e4 LT |
1723 | static void idefloppy_add_settings(ide_drive_t *drive) |
1724 | { | |
1725 | idefloppy_floppy_t *floppy = drive->driver_data; | |
1726 | ||
1727 | /* | |
1497943e | 1728 | * drive setting name read/write data type min max mul_factor div_factor data pointer set function |
1da177e4 | 1729 | */ |
1497943e BZ |
1730 | ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL); |
1731 | ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL); | |
1732 | ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL); | |
1733 | ide_add_setting(drive, "ticks", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &floppy->ticks, NULL); | |
1da177e4 | 1734 | } |
7662d046 BZ |
1735 | #else |
1736 | static inline void idefloppy_add_settings(ide_drive_t *drive) { ; } | |
1737 | #endif | |
1da177e4 LT |
1738 | |
1739 | /* | |
1740 | * Driver initialization. | |
1741 | */ | |
1742 | static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy) | |
1743 | { | |
1744 | struct idefloppy_id_gcw gcw; | |
1745 | ||
1746 | *((u16 *) &gcw) = drive->id->config; | |
1747 | floppy->pc = floppy->pc_stack; | |
1748 | if (gcw.drq_type == 1) | |
1749 | set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags); | |
1750 | /* | |
1751 | * We used to check revisions here. At this point however | |
1752 | * I'm giving up. Just assume they are all broken, its easier. | |
1753 | * | |
1754 | * The actual reason for the workarounds was likely | |
1755 | * a driver bug after all rather than a firmware bug, | |
1756 | * and the workaround below used to hide it. It should | |
1757 | * be fixed as of version 1.9, but to be on the safe side | |
1758 | * we'll leave the limitation below for the 2.2.x tree. | |
1759 | */ | |
1760 | ||
1761 | if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) { | |
1762 | set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags); | |
1763 | /* This value will be visible in the /proc/ide/hdx/settings */ | |
1764 | floppy->ticks = IDEFLOPPY_TICKS_DELAY; | |
1765 | blk_queue_max_sectors(drive->queue, 64); | |
1766 | } | |
1767 | ||
1768 | /* | |
1769 | * Guess what? The IOMEGA Clik! drive also needs the | |
1770 | * above fix. It makes nasty clicking noises without | |
1771 | * it, so please don't remove this. | |
1772 | */ | |
1773 | if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) { | |
1774 | blk_queue_max_sectors(drive->queue, 64); | |
1775 | set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags); | |
1776 | } | |
1777 | ||
1778 | ||
1779 | (void) idefloppy_get_capacity(drive); | |
1780 | idefloppy_add_settings(drive); | |
1781 | } | |
1782 | ||
4031bbe4 | 1783 | static void ide_floppy_remove(ide_drive_t *drive) |
1da177e4 LT |
1784 | { |
1785 | idefloppy_floppy_t *floppy = drive->driver_data; | |
1786 | struct gendisk *g = floppy->disk; | |
1787 | ||
7662d046 | 1788 | ide_proc_unregister_driver(drive, floppy->driver); |
1da177e4 LT |
1789 | |
1790 | del_gendisk(g); | |
1791 | ||
1792 | ide_floppy_put(floppy); | |
1da177e4 LT |
1793 | } |
1794 | ||
1795 | static void ide_floppy_release(struct kref *kref) | |
1796 | { | |
1797 | struct ide_floppy_obj *floppy = to_ide_floppy(kref); | |
1798 | ide_drive_t *drive = floppy->drive; | |
1799 | struct gendisk *g = floppy->disk; | |
1800 | ||
1801 | drive->driver_data = NULL; | |
1802 | g->private_data = NULL; | |
1803 | put_disk(g); | |
1804 | kfree(floppy); | |
1805 | } | |
1806 | ||
ecfd80e4 | 1807 | #ifdef CONFIG_IDE_PROC_FS |
1da177e4 LT |
1808 | static int proc_idefloppy_read_capacity |
1809 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
1810 | { | |
1811 | ide_drive_t*drive = (ide_drive_t *)data; | |
1812 | int len; | |
1813 | ||
1814 | len = sprintf(page,"%llu\n", (long long)idefloppy_capacity(drive)); | |
1815 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
1816 | } | |
1817 | ||
1818 | static ide_proc_entry_t idefloppy_proc[] = { | |
1819 | { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL }, | |
1820 | { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL }, | |
1821 | { NULL, 0, NULL, NULL } | |
1822 | }; | |
ecfd80e4 | 1823 | #endif /* CONFIG_IDE_PROC_FS */ |
1da177e4 | 1824 | |
4031bbe4 | 1825 | static int ide_floppy_probe(ide_drive_t *); |
1da177e4 | 1826 | |
1da177e4 | 1827 | static ide_driver_t idefloppy_driver = { |
8604affd | 1828 | .gen_driver = { |
4ef3b8f4 | 1829 | .owner = THIS_MODULE, |
8604affd BZ |
1830 | .name = "ide-floppy", |
1831 | .bus = &ide_bus_type, | |
8604affd | 1832 | }, |
4031bbe4 RK |
1833 | .probe = ide_floppy_probe, |
1834 | .remove = ide_floppy_remove, | |
1da177e4 LT |
1835 | .version = IDEFLOPPY_VERSION, |
1836 | .media = ide_floppy, | |
1da177e4 | 1837 | .supports_dsc_overlap = 0, |
1da177e4 LT |
1838 | .do_request = idefloppy_do_request, |
1839 | .end_request = idefloppy_do_end_request, | |
1840 | .error = __ide_error, | |
1841 | .abort = __ide_abort, | |
7662d046 | 1842 | #ifdef CONFIG_IDE_PROC_FS |
1da177e4 | 1843 | .proc = idefloppy_proc, |
7662d046 | 1844 | #endif |
1da177e4 LT |
1845 | }; |
1846 | ||
1847 | static int idefloppy_open(struct inode *inode, struct file *filp) | |
1848 | { | |
1849 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
1850 | struct ide_floppy_obj *floppy; | |
1851 | ide_drive_t *drive; | |
1852 | idefloppy_pc_t pc; | |
1853 | int ret = 0; | |
1854 | ||
1855 | debug_log(KERN_INFO "Reached idefloppy_open\n"); | |
1856 | ||
1857 | if (!(floppy = ide_floppy_get(disk))) | |
1858 | return -ENXIO; | |
1859 | ||
1860 | drive = floppy->drive; | |
1861 | ||
c94964a4 | 1862 | floppy->openers++; |
1da177e4 | 1863 | |
c94964a4 | 1864 | if (floppy->openers == 1) { |
1da177e4 LT |
1865 | clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); |
1866 | /* Just in case */ | |
1867 | ||
1868 | idefloppy_create_test_unit_ready_cmd(&pc); | |
1869 | if (idefloppy_queue_pc_tail(drive, &pc)) { | |
1870 | idefloppy_create_start_stop_cmd(&pc, 1); | |
1871 | (void) idefloppy_queue_pc_tail(drive, &pc); | |
1872 | } | |
1873 | ||
1874 | if (idefloppy_get_capacity (drive) | |
1875 | && (filp->f_flags & O_NDELAY) == 0 | |
1876 | /* | |
1877 | ** Allow O_NDELAY to open a drive without a disk, or with | |
1878 | ** an unreadable disk, so that we can get the format | |
1879 | ** capacity of the drive or begin the format - Sam | |
1880 | */ | |
1881 | ) { | |
1da177e4 LT |
1882 | ret = -EIO; |
1883 | goto out_put_floppy; | |
1884 | } | |
1885 | ||
1886 | if (floppy->wp && (filp->f_mode & 2)) { | |
1da177e4 LT |
1887 | ret = -EROFS; |
1888 | goto out_put_floppy; | |
1889 | } | |
1890 | set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags); | |
1891 | /* IOMEGA Clik! drives do not support lock/unlock commands */ | |
1892 | if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { | |
1893 | idefloppy_create_prevent_cmd(&pc, 1); | |
1894 | (void) idefloppy_queue_pc_tail(drive, &pc); | |
1895 | } | |
1896 | check_disk_change(inode->i_bdev); | |
1897 | } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) { | |
1da177e4 LT |
1898 | ret = -EBUSY; |
1899 | goto out_put_floppy; | |
1900 | } | |
1901 | return 0; | |
1902 | ||
1903 | out_put_floppy: | |
c94964a4 | 1904 | floppy->openers--; |
1da177e4 LT |
1905 | ide_floppy_put(floppy); |
1906 | return ret; | |
1907 | } | |
1908 | ||
1909 | static int idefloppy_release(struct inode *inode, struct file *filp) | |
1910 | { | |
1911 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
1912 | struct ide_floppy_obj *floppy = ide_floppy_g(disk); | |
1913 | ide_drive_t *drive = floppy->drive; | |
1914 | idefloppy_pc_t pc; | |
1915 | ||
1916 | debug_log(KERN_INFO "Reached idefloppy_release\n"); | |
1917 | ||
c94964a4 | 1918 | if (floppy->openers == 1) { |
1da177e4 LT |
1919 | /* IOMEGA Clik! drives do not support lock/unlock commands */ |
1920 | if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { | |
1921 | idefloppy_create_prevent_cmd(&pc, 0); | |
1922 | (void) idefloppy_queue_pc_tail(drive, &pc); | |
1923 | } | |
1924 | ||
1925 | clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); | |
1926 | } | |
c94964a4 BZ |
1927 | |
1928 | floppy->openers--; | |
1da177e4 LT |
1929 | |
1930 | ide_floppy_put(floppy); | |
1931 | ||
1932 | return 0; | |
1933 | } | |
1934 | ||
a885c8c4 CH |
1935 | static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1936 | { | |
1937 | struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); | |
1938 | ide_drive_t *drive = floppy->drive; | |
1939 | ||
1940 | geo->heads = drive->bios_head; | |
1941 | geo->sectors = drive->bios_sect; | |
1942 | geo->cylinders = (u16)drive->bios_cyl; /* truncate */ | |
1943 | return 0; | |
1944 | } | |
1945 | ||
1da177e4 LT |
1946 | static int idefloppy_ioctl(struct inode *inode, struct file *file, |
1947 | unsigned int cmd, unsigned long arg) | |
1948 | { | |
1949 | struct block_device *bdev = inode->i_bdev; | |
1950 | struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); | |
1951 | ide_drive_t *drive = floppy->drive; | |
1952 | void __user *argp = (void __user *)arg; | |
07203f64 | 1953 | int err; |
1da177e4 LT |
1954 | int prevent = (arg) ? 1 : 0; |
1955 | idefloppy_pc_t pc; | |
1da177e4 LT |
1956 | |
1957 | switch (cmd) { | |
1958 | case CDROMEJECT: | |
1959 | prevent = 0; | |
1960 | /* fall through */ | |
1961 | case CDROM_LOCKDOOR: | |
c94964a4 | 1962 | if (floppy->openers > 1) |
1da177e4 LT |
1963 | return -EBUSY; |
1964 | ||
1965 | /* The IOMEGA Clik! Drive doesn't support this command - no room for an eject mechanism */ | |
1966 | if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { | |
1967 | idefloppy_create_prevent_cmd(&pc, prevent); | |
1968 | (void) idefloppy_queue_pc_tail(drive, &pc); | |
1969 | } | |
1970 | if (cmd == CDROMEJECT) { | |
1971 | idefloppy_create_start_stop_cmd(&pc, 2); | |
1972 | (void) idefloppy_queue_pc_tail(drive, &pc); | |
1973 | } | |
1974 | return 0; | |
1975 | case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED: | |
1976 | return 0; | |
1977 | case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY: | |
1978 | return idefloppy_get_format_capacities(drive, argp); | |
1979 | case IDEFLOPPY_IOCTL_FORMAT_START: | |
1980 | ||
1981 | if (!(file->f_mode & 2)) | |
1982 | return -EPERM; | |
1983 | ||
c94964a4 | 1984 | if (floppy->openers > 1) { |
1da177e4 LT |
1985 | /* Don't format if someone is using the disk */ |
1986 | ||
1987 | clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, | |
1988 | &floppy->flags); | |
1989 | return -EBUSY; | |
1990 | } | |
1991 | ||
1992 | set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); | |
1993 | ||
1994 | err = idefloppy_begin_format(drive, argp); | |
1995 | if (err) | |
1996 | clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); | |
1997 | return err; | |
1998 | /* | |
1999 | ** Note, the bit will be cleared when the device is | |
2000 | ** closed. This is the cleanest way to handle the | |
2001 | ** situation where the drive does not support | |
2002 | ** format progress reporting. | |
2003 | */ | |
2004 | case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS: | |
2005 | return idefloppy_get_format_progress(drive, argp); | |
2006 | } | |
89636af2 BZ |
2007 | |
2008 | /* | |
2009 | * skip SCSI_IOCTL_SEND_COMMAND (deprecated) | |
2010 | * and CDROM_SEND_PACKET (legacy) ioctls | |
2011 | */ | |
2012 | if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND) | |
2013 | err = scsi_cmd_ioctl(file, bdev->bd_disk->queue, | |
2014 | bdev->bd_disk, cmd, argp); | |
2015 | else | |
2016 | err = -ENOTTY; | |
2017 | ||
2018 | if (err == -ENOTTY) | |
2019 | err = generic_ide_ioctl(drive, file, bdev, cmd, arg); | |
2020 | ||
2021 | return err; | |
1da177e4 LT |
2022 | } |
2023 | ||
2024 | static int idefloppy_media_changed(struct gendisk *disk) | |
2025 | { | |
2026 | struct ide_floppy_obj *floppy = ide_floppy_g(disk); | |
2027 | ide_drive_t *drive = floppy->drive; | |
2028 | ||
2029 | /* do not scan partitions twice if this is a removable device */ | |
2030 | if (drive->attach) { | |
2031 | drive->attach = 0; | |
2032 | return 0; | |
2033 | } | |
2034 | return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags); | |
2035 | } | |
2036 | ||
2037 | static int idefloppy_revalidate_disk(struct gendisk *disk) | |
2038 | { | |
2039 | struct ide_floppy_obj *floppy = ide_floppy_g(disk); | |
2040 | set_capacity(disk, idefloppy_capacity(floppy->drive)); | |
2041 | return 0; | |
2042 | } | |
2043 | ||
2044 | static struct block_device_operations idefloppy_ops = { | |
2045 | .owner = THIS_MODULE, | |
2046 | .open = idefloppy_open, | |
2047 | .release = idefloppy_release, | |
2048 | .ioctl = idefloppy_ioctl, | |
a885c8c4 | 2049 | .getgeo = idefloppy_getgeo, |
1da177e4 LT |
2050 | .media_changed = idefloppy_media_changed, |
2051 | .revalidate_disk= idefloppy_revalidate_disk | |
2052 | }; | |
2053 | ||
4031bbe4 | 2054 | static int ide_floppy_probe(ide_drive_t *drive) |
1da177e4 LT |
2055 | { |
2056 | idefloppy_floppy_t *floppy; | |
2057 | struct gendisk *g; | |
2058 | ||
2059 | if (!strstr("ide-floppy", drive->driver_req)) | |
2060 | goto failed; | |
2061 | if (!drive->present) | |
2062 | goto failed; | |
2063 | if (drive->media != ide_floppy) | |
2064 | goto failed; | |
2065 | if (!idefloppy_identify_device (drive, drive->id)) { | |
2066 | printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name); | |
2067 | goto failed; | |
2068 | } | |
2069 | if (drive->scsi) { | |
2070 | printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name); | |
2071 | goto failed; | |
2072 | } | |
5cbded58 | 2073 | if ((floppy = kzalloc(sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) { |
1da177e4 LT |
2074 | printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name); |
2075 | goto failed; | |
2076 | } | |
2077 | ||
2078 | g = alloc_disk(1 << PARTN_BITS); | |
2079 | if (!g) | |
2080 | goto out_free_floppy; | |
2081 | ||
2082 | ide_init_disk(g, drive); | |
2083 | ||
7662d046 | 2084 | ide_proc_register_driver(drive, &idefloppy_driver); |
1da177e4 | 2085 | |
1da177e4 LT |
2086 | kref_init(&floppy->kref); |
2087 | ||
2088 | floppy->drive = drive; | |
2089 | floppy->driver = &idefloppy_driver; | |
2090 | floppy->disk = g; | |
2091 | ||
2092 | g->private_data = &floppy->driver; | |
2093 | ||
2094 | drive->driver_data = floppy; | |
2095 | ||
1da177e4 | 2096 | idefloppy_setup (drive, floppy); |
8604affd | 2097 | |
1da177e4 LT |
2098 | g->minors = 1 << PARTN_BITS; |
2099 | g->driverfs_dev = &drive->gendev; | |
1da177e4 LT |
2100 | g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0; |
2101 | g->fops = &idefloppy_ops; | |
2102 | drive->attach = 1; | |
2103 | add_disk(g); | |
2104 | return 0; | |
2105 | ||
1da177e4 LT |
2106 | out_free_floppy: |
2107 | kfree(floppy); | |
2108 | failed: | |
8604affd | 2109 | return -ENODEV; |
1da177e4 LT |
2110 | } |
2111 | ||
2112 | MODULE_DESCRIPTION("ATAPI FLOPPY Driver"); | |
2113 | ||
2114 | static void __exit idefloppy_exit (void) | |
2115 | { | |
8604affd | 2116 | driver_unregister(&idefloppy_driver.gen_driver); |
1da177e4 LT |
2117 | } |
2118 | ||
17514e8a | 2119 | static int __init idefloppy_init(void) |
1da177e4 LT |
2120 | { |
2121 | printk("ide-floppy driver " IDEFLOPPY_VERSION "\n"); | |
8604affd | 2122 | return driver_register(&idefloppy_driver.gen_driver); |
1da177e4 LT |
2123 | } |
2124 | ||
263756ec | 2125 | MODULE_ALIAS("ide:*m-floppy*"); |
1da177e4 LT |
2126 | module_init(idefloppy_init); |
2127 | module_exit(idefloppy_exit); | |
2128 | MODULE_LICENSE("GPL"); |