1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * drivers/block/ataflop.c |
4 | * |
5 | * Copyright (C) 1993 Greg Harp |
6 | * Atari Support by Bjoern Brauel, Roman Hodek |
7 | * |
8 | * Big cleanup Sep 11..14 1994 Roman Hodek: |
9 | * - Driver now works interrupt driven |
10 | * - Support for two drives; should work, but I cannot test that :-( |
11 | * - Reading is done in whole tracks and buffered to speed up things |
12 | * - Disk change detection and drive deselecting after motor-off |
13 | * similar to TOS |
14 | * - Autodetection of disk format (DD/HD); untested yet, because I |
15 | * don't have an HD drive :-( |
16 | * |
17 | * Fixes Nov 13 1994 Martin Schaller: |
18 | * - Autodetection works now |
19 | * - Support for 5 1/4'' disks |
20 | * - Removed drive type (unknown on atari) |
21 | * - Do seeks with 8 Mhz |
22 | * |
23 | * Changes by Andreas Schwab: |
24 | * - After errors in multiple read mode try again reading single sectors |
25 | * (Feb 1995): |
26 | * - Clean up error handling |
27 | * - Set blk_size for proper size checking |
28 | * - Initialize track register when testing presence of floppy |
29 | * - Implement some ioctl's |
30 | * |
31 | * Changes by Torsten Lang: |
32 | * - When probing the floppies we should add the FDCCMDADD_H flag since |
33 | * the FDC will otherwise wait forever when no disk is inserted... |
34 | * |
35 | * ++ Freddi Aschwanden (fa) 20.9.95 fixes for medusa: |
36 | * - MFPDELAY() after each FDC access -> atari |
37 | * - more/other disk formats |
38 | * - DMA to the block buffer directly if we have a 32bit DMA |
39 | * - for medusa, the step rate is always 3ms |
40 | * - on medusa, use only cache_push() |
41 | * Roman: |
42 | * - Make disk format numbering independent from minors |
43 | * - Let user set max. supported drive type (speeds up format |
44 | * detection, saves buffer space) |
45 | * |
46 | * Roman 10/15/95: |
47 | * - implement some more ioctls |
48 | * - disk formatting |
49 | * |
50 | * Andreas 95/12/12: |
51 | * - increase gap size at start of track for HD/ED disks |
52 | * |
53 | * Michael (MSch) 11/07/96: |
54 | * - implemented FDSETPRM and FDDEFPRM ioctl |
55 | * |
56 | * Andreas (97/03/19): |
57 | * - implemented missing BLK* ioctls |
58 | * |
59 | * Things left to do: |
60 | * - Formatting |
61 | * - Maybe a better strategy for disk change detection (does anyone |
62 | * know one?) |
63 | */ |
64 | |
65 | #include <linux/module.h> |
66 | |
67 | #include <linux/fd.h> |
68 | #include <linux/delay.h> |
69 | #include <linux/init.h> |
70 | #include <linux/blk-mq.h> |
71 | #include <linux/major.h> |
72 | #include <linux/mutex.h> |
73 | #include <linux/completion.h> |
74 | #include <linux/wait.h> |
75 | |
76 | #include <asm/atariints.h> |
77 | #include <asm/atari_stdma.h> |
78 | #include <asm/atari_stram.h> |
79 | |
80 | #define FD_MAX_UNITS 2 |
81 | |
82 | #undef DEBUG |
83 | |
84 | static DEFINE_MUTEX(ataflop_mutex); |
85 | static struct request *fd_request; |
86 | |
87 | /* |
88 | * WD1772 stuff |
89 | */ |
90 | |
91 | /* register codes */ |
92 | |
93 | #define FDCSELREG_STP (0x80) /* command/status register */ |
94 | #define FDCSELREG_TRA (0x82) /* track register */ |
95 | #define FDCSELREG_SEC (0x84) /* sector register */ |
96 | #define FDCSELREG_DTA (0x86) /* data register */ |
97 | |
98 | /* register names for FDC_READ/WRITE macros */ |
99 | |
100 | #define FDCREG_CMD 0 |
101 | #define FDCREG_STATUS 0 |
102 | #define FDCREG_TRACK 2 |
103 | #define FDCREG_SECTOR 4 |
104 | #define FDCREG_DATA 6 |
105 | |
106 | /* command opcodes */ |
107 | |
108 | #define FDCCMD_RESTORE (0x00) /* - */ |
109 | #define FDCCMD_SEEK (0x10) /* | */ |
110 | #define FDCCMD_STEP (0x20) /* | TYP 1 Commands */ |
111 | #define FDCCMD_STIN (0x40) /* | */ |
112 | #define FDCCMD_STOT (0x60) /* - */ |
113 | #define FDCCMD_RDSEC (0x80) /* - TYP 2 Commands */ |
114 | #define FDCCMD_WRSEC (0xa0) /* - " */ |
115 | #define FDCCMD_RDADR (0xc0) /* - */ |
116 | #define FDCCMD_RDTRA (0xe0) /* | TYP 3 Commands */ |
117 | #define FDCCMD_WRTRA (0xf0) /* - */ |
118 | #define FDCCMD_FORCI (0xd0) /* - TYP 4 Command */ |
119 | |
120 | /* command modifier bits */ |
121 | |
122 | #define FDCCMDADD_SR6 (0x00) /* step rate settings */ |
123 | #define FDCCMDADD_SR12 (0x01) |
124 | #define FDCCMDADD_SR2 (0x02) |
125 | #define FDCCMDADD_SR3 (0x03) |
126 | #define FDCCMDADD_V (0x04) /* verify */ |
127 | #define FDCCMDADD_H (0x08) /* wait for spin-up */ |
128 | #define FDCCMDADD_U (0x10) /* update track register */ |
129 | #define FDCCMDADD_M (0x10) /* multiple sector access */ |
130 | #define FDCCMDADD_E (0x04) /* head settling flag */ |
131 | #define FDCCMDADD_P (0x02) /* precompensation off */ |
132 | #define FDCCMDADD_A0 (0x01) /* DAM flag */ |
133 | |
134 | /* status register bits */ |
135 | |
136 | #define FDCSTAT_MOTORON (0x80) /* motor on */ |
137 | #define FDCSTAT_WPROT (0x40) /* write protected (FDCCMD_WR*) */ |
138 | #define FDCSTAT_SPINUP (0x20) /* motor speed stable (Type I) */ |
139 | #define FDCSTAT_DELDAM (0x20) /* sector has deleted DAM (Type II+III) */ |
140 | #define FDCSTAT_RECNF (0x10) /* record not found */ |
141 | #define FDCSTAT_CRC (0x08) /* CRC error */ |
142 | #define FDCSTAT_TR00 (0x04) /* Track 00 flag (Type I) */ |
143 | #define FDCSTAT_LOST (0x04) /* Lost Data (Type II+III) */ |
144 | #define FDCSTAT_IDX (0x02) /* Index status (Type I) */ |
145 | #define FDCSTAT_DRQ (0x02) /* DRQ status (Type II+III) */ |
146 | #define FDCSTAT_BUSY (0x01) /* FDC is busy */ |
147 | |
148 | |
149 | /* PSG Port A Bit Nr 0 .. Side Sel .. 0 -> Side 1 1 -> Side 2 */ |
150 | #define DSKSIDE (0x01) |
151 | |
152 | #define DSKDRVNONE (0x06) |
153 | #define DSKDRV0 (0x02) |
154 | #define DSKDRV1 (0x04) |
155 | |
156 | /* step rates */ |
157 | #define FDCSTEP_6 0x00 |
158 | #define FDCSTEP_12 0x01 |
159 | #define FDCSTEP_2 0x02 |
160 | #define FDCSTEP_3 0x03 |
161 | |
162 | struct atari_format_descr { |
163 | int track; /* to be formatted */ |
164 | int head; /* "" "" */ |
165 | int sect_offset; /* offset of first sector */ |
166 | }; |
167 | |
168 | /* Disk types: DD, HD, ED */ |
169 | static struct atari_disk_type { |
170 | const char *name; |
171 | unsigned spt; /* sectors per track */ |
172 | unsigned blocks; /* total number of blocks */ |
173 | unsigned fdc_speed; /* fdc_speed setting */ |
174 | unsigned stretch; /* track doubling ? */ |
175 | } atari_disk_type[] = { |
176 | { "d360" , 9, 720, 0, 0}, /* 0: 360kB diskette */ |
177 | { "D360" , 9, 720, 0, 1}, /* 1: 360kb in 720k or 1.2MB drive */ |
178 | { "D720" , 9,1440, 0, 0}, /* 2: 720kb in 720k or 1.2MB drive */ |
179 | { "D820" , 10,1640, 0, 0}, /* 3: DD disk with 82 tracks/10 sectors */ |
180 | /* formats above are probed for type DD */ |
181 | #define MAX_TYPE_DD 3 |
182 | { "h1200" ,15,2400, 3, 0}, /* 4: 1.2MB diskette */ |
183 | { "H1440" ,18,2880, 3, 0}, /* 5: 1.4 MB diskette (HD) */ |
184 | { "H1640" ,20,3280, 3, 0}, /* 6: 1.64MB diskette (fat HD) 82 tr 20 sec */ |
185 | /* formats above are probed for types DD and HD */ |
186 | #define MAX_TYPE_HD 6 |
187 | { "E2880" ,36,5760, 3, 0}, /* 7: 2.8 MB diskette (ED) */ |
188 | { "E3280" ,40,6560, 3, 0}, /* 8: 3.2 MB diskette (fat ED) 82 tr 40 sec */ |
189 | /* formats above are probed for types DD, HD and ED */ |
190 | #define MAX_TYPE_ED 8 |
191 | /* types below are never autoprobed */ |
192 | { "H1680" ,21,3360, 3, 0}, /* 9: 1.68MB diskette (fat HD) 80 tr 21 sec */ |
193 | { "h410" ,10,820, 0, 1}, /* 10: 410k diskette 41 tr 10 sec, stretch */ |
194 | { "h1476" ,18,2952, 3, 0}, /* 11: 1.48MB diskette 82 tr 18 sec */ |
195 | { "H1722" ,21,3444, 3, 0}, /* 12: 1.72MB diskette 82 tr 21 sec */ |
196 | { "h420" ,10,840, 0, 1}, /* 13: 420k diskette 42 tr 10 sec, stretch */ |
197 | { "H830" ,10,1660, 0, 0}, /* 14: 820k diskette 83 tr 10 sec */ |
198 | { "h1494" ,18,2952, 3, 0}, /* 15: 1.49MB diskette 83 tr 18 sec */ |
199 | { "H1743" ,21,3486, 3, 0}, /* 16: 1.74MB diskette 83 tr 21 sec */ |
200 | { "h880" ,11,1760, 0, 0}, /* 17: 880k diskette 80 tr 11 sec */ |
201 | { "D1040" ,13,2080, 0, 0}, /* 18: 1.04MB diskette 80 tr 13 sec */ |
202 | { "D1120" ,14,2240, 0, 0}, /* 19: 1.12MB diskette 80 tr 14 sec */ |
203 | { "h1600" ,20,3200, 3, 0}, /* 20: 1.60MB diskette 80 tr 20 sec */ |
204 | { "H1760" ,22,3520, 3, 0}, /* 21: 1.76MB diskette 80 tr 22 sec */ |
205 | { "H1920" ,24,3840, 3, 0}, /* 22: 1.92MB diskette 80 tr 24 sec */ |
206 | { "E3200" ,40,6400, 3, 0}, /* 23: 3.2MB diskette 80 tr 40 sec */ |
207 | { "E3520" ,44,7040, 3, 0}, /* 24: 3.52MB diskette 80 tr 44 sec */ |
208 | { "E3840" ,48,7680, 3, 0}, /* 25: 3.84MB diskette 80 tr 48 sec */ |
209 | { "H1840" ,23,3680, 3, 0}, /* 26: 1.84MB diskette 80 tr 23 sec */ |
210 | { "D800" ,10,1600, 0, 0}, /* 27: 800k diskette 80 tr 10 sec */ |
211 | }; |
212 | |
213 | static int StartDiskType[] = { |
214 | MAX_TYPE_DD, |
215 | MAX_TYPE_HD, |
216 | MAX_TYPE_ED |
217 | }; |
218 | |
219 | #define TYPE_DD 0 |
220 | #define TYPE_HD 1 |
221 | #define TYPE_ED 2 |
222 | |
223 | static int DriveType = TYPE_HD; |
224 | |
225 | static DEFINE_SPINLOCK(ataflop_lock); |
226 | |
227 | /* Array for translating minors into disk formats */ |
228 | static struct { |
229 | int index; |
230 | unsigned drive_types; |
231 | } minor2disktype[] = { |
232 | { 0, TYPE_DD }, /* 1: d360 */ |
233 | { 4, TYPE_HD }, /* 2: h1200 */ |
234 | { 1, TYPE_DD }, /* 3: D360 */ |
235 | { 2, TYPE_DD }, /* 4: D720 */ |
236 | { 1, TYPE_DD }, /* 5: h360 = D360 */ |
237 | { 2, TYPE_DD }, /* 6: h720 = D720 */ |
238 | { 5, TYPE_HD }, /* 7: H1440 */ |
239 | { 7, TYPE_ED }, /* 8: E2880 */ |
240 | /* some PC formats :-) */ |
241 | { 8, TYPE_ED }, /* 9: E3280 <- was "CompaQ" == E2880 for PC */ |
242 | { 5, TYPE_HD }, /* 10: h1440 = H1440 */ |
243 | { 9, TYPE_HD }, /* 11: H1680 */ |
244 | { 10, TYPE_DD }, /* 12: h410 */ |
245 | { 3, TYPE_DD }, /* 13: H820 <- == D820, 82x10 */ |
246 | { 11, TYPE_HD }, /* 14: h1476 */ |
247 | { 12, TYPE_HD }, /* 15: H1722 */ |
248 | { 13, TYPE_DD }, /* 16: h420 */ |
249 | { 14, TYPE_DD }, /* 17: H830 */ |
250 | { 15, TYPE_HD }, /* 18: h1494 */ |
251 | { 16, TYPE_HD }, /* 19: H1743 */ |
252 | { 17, TYPE_DD }, /* 20: h880 */ |
253 | { 18, TYPE_DD }, /* 21: D1040 */ |
254 | { 19, TYPE_DD }, /* 22: D1120 */ |
255 | { 20, TYPE_HD }, /* 23: h1600 */ |
256 | { 21, TYPE_HD }, /* 24: H1760 */ |
257 | { 22, TYPE_HD }, /* 25: H1920 */ |
258 | { 23, TYPE_ED }, /* 26: E3200 */ |
259 | { 24, TYPE_ED }, /* 27: E3520 */ |
260 | { 25, TYPE_ED }, /* 28: E3840 */ |
261 | { 26, TYPE_HD }, /* 29: H1840 */ |
262 | { 27, TYPE_DD }, /* 30: D800 */ |
263 | { 6, TYPE_HD }, /* 31: H1640 <- was H1600 == h1600 for PC */ |
264 | }; |
265 | |
266 | #define NUM_DISK_MINORS ARRAY_SIZE(minor2disktype) |
267 | |
268 | /* |
269 | * Maximum disk size (in kilobytes). This default is used whenever the |
270 | * current disk size is unknown. |
271 | */ |
272 | #define MAX_DISK_SIZE 3280 |
273 | |
274 | /* |
275 | * MSch: User-provided type information. 'drive' points to |
276 | * the respective entry of this array. Set by FDSETPRM ioctls. |
277 | */ |
278 | static struct atari_disk_type user_params[FD_MAX_UNITS]; |
279 | |
280 | /* |
281 | * User-provided permanent type information. 'drive' points to |
282 | * the respective entry of this array. Set by FDDEFPRM ioctls, |
283 | * restored upon disk change by floppy_revalidate() if valid (as seen by |
284 | * default_params[].blocks > 0 - a bit in unit[].flags might be used for this?) |
285 | */ |
286 | static struct atari_disk_type default_params[FD_MAX_UNITS]; |
287 | |
288 | /* current info on each unit */ |
289 | static struct atari_floppy_struct { |
290 | int connected; /* !=0 : drive is connected */ |
291 | int autoprobe; /* !=0 : do autoprobe */ |
292 | |
293 | struct atari_disk_type *disktype; /* current type of disk */ |
294 | |
295 | int track; /* current head position or -1 if |
296 | unknown */ |
297 | unsigned int steprate; /* steprate setting */ |
298 | unsigned int wpstat; /* current state of WP signal (for |
299 | disk change detection) */ |
300 | int flags; /* flags */ |
301 | struct gendisk *disk[NUM_DISK_MINORS]; |
302 | bool registered[NUM_DISK_MINORS]; |
303 | int ref; |
304 | int type; |
305 | struct blk_mq_tag_set tag_set; |
306 | int error_count; |
307 | } unit[FD_MAX_UNITS]; |
308 | |
309 | #define UD unit[drive] |
310 | #define UDT unit[drive].disktype |
311 | #define SUD unit[SelectedDrive] |
312 | #define SUDT unit[SelectedDrive].disktype |
313 | |
314 | |
315 | #define FDC_READ(reg) ({ \ |
316 | /* unsigned long __flags; */ \ |
317 | unsigned short __val; \ |
318 | /* local_irq_save(__flags); */ \ |
319 | dma_wd.dma_mode_status = 0x80 | (reg); \ |
320 | udelay(25); \ |
321 | __val = dma_wd.fdc_acces_seccount; \ |
322 | MFPDELAY(); \ |
323 | /* local_irq_restore(__flags); */ \ |
324 | __val & 0xff; \ |
325 | }) |
326 | |
327 | #define FDC_WRITE(reg,val) \ |
328 | do { \ |
329 | /* unsigned long __flags; */ \ |
330 | /* local_irq_save(__flags); */ \ |
331 | dma_wd.dma_mode_status = 0x80 | (reg); \ |
332 | udelay(25); \ |
333 | dma_wd.fdc_acces_seccount = (val); \ |
334 | MFPDELAY(); \ |
335 | /* local_irq_restore(__flags); */ \ |
336 | } while(0) |
337 | |
338 | |
339 | /* Buffering variables: |
340 | * First, there is a DMA buffer in ST-RAM that is used for floppy DMA |
341 | * operations. Second, a track buffer is used to cache a whole track |
342 | * of the disk to save read operations. These are two separate buffers |
343 | * because that allows write operations without clearing the track buffer. |
344 | */ |
345 | |
346 | static int MaxSectors[] = { |
347 | 11, 22, 44 |
348 | }; |
349 | static int BufferSize[] = { |
350 | 15*512, 30*512, 60*512 |
351 | }; |
352 | |
353 | #define BUFFER_SIZE (BufferSize[DriveType]) |
354 | |
355 | unsigned char *DMABuffer; /* buffer for writes */ |
356 | static unsigned long PhysDMABuffer; /* physical address */ |
357 | |
358 | static int UseTrackbuffer = -1; /* Do track buffering? */ |
359 | module_param(UseTrackbuffer, int, 0); |
360 | |
361 | unsigned char *TrackBuffer; /* buffer for reads */ |
362 | static unsigned long PhysTrackBuffer; /* physical address */ |
363 | static int BufferDrive, BufferSide, BufferTrack; |
364 | static int read_track; /* non-zero if we are reading whole tracks */ |
365 | |
366 | #define SECTOR_BUFFER(sec) (TrackBuffer + ((sec)-1)*512) |
367 | #define IS_BUFFERED(drive,side,track) \ |
368 | (BufferDrive == (drive) && BufferSide == (side) && BufferTrack == (track)) |
369 | |
370 | /* |
371 | * These are global variables, as that's the easiest way to give |
372 | * information to interrupts. They are the data used for the current |
373 | * request. |
374 | */ |
375 | static int SelectedDrive = 0; |
376 | static int ReqCmd, ReqBlock; |
377 | static int ReqSide, ReqTrack, ReqSector, ReqCnt; |
378 | static int HeadSettleFlag = 0; |
379 | static unsigned char *ReqData, *ReqBuffer; |
380 | static int MotorOn = 0, MotorOffTrys; |
381 | static int IsFormatting = 0, FormatError; |
382 | |
383 | static int UserSteprate[FD_MAX_UNITS] = { -1, -1 }; |
384 | module_param_array(UserSteprate, int, NULL, 0); |
385 | |
386 | static DECLARE_COMPLETION(format_wait); |
387 | |
388 | static unsigned long changed_floppies = 0xff, fake_change = 0; |
389 | #define CHECK_CHANGE_DELAY HZ/2 |
390 | |
391 | #define FD_MOTOR_OFF_DELAY (3*HZ) |
392 | #define FD_MOTOR_OFF_MAXTRY (10*20) |
393 | |
394 | #define FLOPPY_TIMEOUT (6*HZ) |
395 | #define RECALIBRATE_ERRORS 4 /* After this many errors the drive |
396 | * will be recalibrated. */ |
397 | #define MAX_ERRORS 8 /* After this many errors the driver |
398 | * will give up. */ |
399 | |
400 | |
401 | /* |
402 | * The driver is trying to determine the correct media format |
403 | * while Probing is set. fd_rwsec_done() clears it after a |
404 | * successful access. |
405 | */ |
406 | static int Probing = 0; |
407 | |
408 | /* This flag is set when a dummy seek is necessary to make the WP |
409 | * status bit accessible. |
410 | */ |
411 | static int NeedSeek = 0; |
412 | |
413 | |
414 | #ifdef DEBUG |
415 | #define DPRINT(a) printk a |
416 | #else |
417 | #define DPRINT(a) |
418 | #endif |
419 | |
420 | /***************************** Prototypes *****************************/ |
421 | |
422 | static void fd_select_side( int side ); |
423 | static void fd_select_drive( int drive ); |
424 | static void fd_deselect( void ); |
425 | static void fd_motor_off_timer(struct timer_list *unused); |
426 | static void check_change(struct timer_list *unused); |
427 | static irqreturn_t floppy_irq (int irq, void *dummy); |
428 | static void fd_error( void ); |
429 | static int do_format(int drive, int type, struct atari_format_descr *desc); |
430 | static void do_fd_action( int drive ); |
431 | static void fd_calibrate( void ); |
432 | static void fd_calibrate_done( int status ); |
433 | static void fd_seek( void ); |
434 | static void fd_seek_done( int status ); |
435 | static void fd_rwsec( void ); |
436 | static void fd_readtrack_check(struct timer_list *unused); |
437 | static void fd_rwsec_done( int status ); |
438 | static void fd_rwsec_done1(int status); |
439 | static void fd_writetrack( void ); |
440 | static void fd_writetrack_done( int status ); |
441 | static void fd_times_out(struct timer_list *unused); |
442 | static void finish_fdc( void ); |
443 | static void finish_fdc_done( int dummy ); |
444 | static void setup_req_params( int drive ); |
445 | static int fd_locked_ioctl(struct block_device *bdev, blk_mode_t mode, |
446 | unsigned int cmd, unsigned long param); |
447 | static void fd_probe( int drive ); |
448 | static int fd_test_drive_present( int drive ); |
449 | static void config_types( void ); |
450 | static int floppy_open(struct gendisk *disk, blk_mode_t mode); |
451 | static void floppy_release(struct gendisk *disk); |
452 | |
453 | /************************* End of Prototypes **************************/ |
454 | |
455 | static DEFINE_TIMER(motor_off_timer, fd_motor_off_timer); |
456 | static DEFINE_TIMER(readtrack_timer, fd_readtrack_check); |
457 | static DEFINE_TIMER(timeout_timer, fd_times_out); |
458 | static DEFINE_TIMER(fd_timer, check_change); |
459 | |
460 | static void fd_end_request_cur(blk_status_t err) |
461 | { |
462 | DPRINT(("fd_end_request_cur(), bytes %d of %d\n" , |
463 | blk_rq_cur_bytes(fd_request), |
464 | blk_rq_bytes(fd_request))); |
465 | |
466 | if (!blk_update_request(rq: fd_request, error: err, |
467 | nr_bytes: blk_rq_cur_bytes(rq: fd_request))) { |
468 | DPRINT(("calling __blk_mq_end_request()\n" )); |
469 | __blk_mq_end_request(rq: fd_request, error: err); |
470 | fd_request = NULL; |
471 | } else { |
472 | /* requeue rest of request */ |
473 | DPRINT(("calling blk_mq_requeue_request()\n" )); |
474 | blk_mq_requeue_request(rq: fd_request, kick_requeue_list: true); |
475 | fd_request = NULL; |
476 | } |
477 | } |
478 | |
479 | static inline void start_motor_off_timer(void) |
480 | { |
481 | mod_timer(timer: &motor_off_timer, expires: jiffies + FD_MOTOR_OFF_DELAY); |
482 | MotorOffTrys = 0; |
483 | } |
484 | |
485 | static inline void start_check_change_timer( void ) |
486 | { |
487 | mod_timer(timer: &fd_timer, expires: jiffies + CHECK_CHANGE_DELAY); |
488 | } |
489 | |
490 | static inline void start_timeout(void) |
491 | { |
492 | mod_timer(timer: &timeout_timer, expires: jiffies + FLOPPY_TIMEOUT); |
493 | } |
494 | |
495 | static inline void stop_timeout(void) |
496 | { |
497 | del_timer(timer: &timeout_timer); |
498 | } |
499 | |
500 | /* Select the side to use. */ |
501 | |
502 | static void fd_select_side( int side ) |
503 | { |
504 | unsigned long flags; |
505 | |
506 | /* protect against various other ints mucking around with the PSG */ |
507 | local_irq_save(flags); |
508 | |
509 | sound_ym.rd_data_reg_sel = 14; /* Select PSG Port A */ |
510 | sound_ym.wd_data = (side == 0) ? sound_ym.rd_data_reg_sel | 0x01 : |
511 | sound_ym.rd_data_reg_sel & 0xfe; |
512 | |
513 | local_irq_restore(flags); |
514 | } |
515 | |
516 | |
517 | /* Select a drive, update the FDC's track register and set the correct |
518 | * clock speed for this disk's type. |
519 | */ |
520 | |
521 | static void fd_select_drive( int drive ) |
522 | { |
523 | unsigned long flags; |
524 | unsigned char tmp; |
525 | |
526 | if (drive == SelectedDrive) |
527 | return; |
528 | |
529 | /* protect against various other ints mucking around with the PSG */ |
530 | local_irq_save(flags); |
531 | sound_ym.rd_data_reg_sel = 14; /* Select PSG Port A */ |
532 | tmp = sound_ym.rd_data_reg_sel; |
533 | sound_ym.wd_data = (tmp | DSKDRVNONE) & ~(drive == 0 ? DSKDRV0 : DSKDRV1); |
534 | atari_dont_touch_floppy_select = 1; |
535 | local_irq_restore(flags); |
536 | |
537 | /* restore track register to saved value */ |
538 | FDC_WRITE( FDCREG_TRACK, UD.track ); |
539 | udelay(25); |
540 | |
541 | /* select 8/16 MHz */ |
542 | if (UDT) |
543 | if (ATARIHW_PRESENT(FDCSPEED)) |
544 | dma_wd.fdc_speed = UDT->fdc_speed; |
545 | |
546 | SelectedDrive = drive; |
547 | } |
548 | |
549 | |
550 | /* Deselect both drives. */ |
551 | |
552 | static void fd_deselect( void ) |
553 | { |
554 | unsigned long flags; |
555 | |
556 | /* protect against various other ints mucking around with the PSG */ |
557 | local_irq_save(flags); |
558 | atari_dont_touch_floppy_select = 0; |
559 | sound_ym.rd_data_reg_sel=14; /* Select PSG Port A */ |
560 | sound_ym.wd_data = (sound_ym.rd_data_reg_sel | |
561 | (MACH_IS_FALCON ? 3 : 7)); /* no drives selected */ |
562 | /* On Falcon, the drive B select line is used on the printer port, so |
563 | * leave it alone... */ |
564 | SelectedDrive = -1; |
565 | local_irq_restore(flags); |
566 | } |
567 | |
568 | |
569 | /* This timer function deselects the drives when the FDC switched the |
570 | * motor off. The deselection cannot happen earlier because the FDC |
571 | * counts the index signals, which arrive only if one drive is selected. |
572 | */ |
573 | |
574 | static void fd_motor_off_timer(struct timer_list *unused) |
575 | { |
576 | unsigned char status; |
577 | |
578 | if (SelectedDrive < 0) |
579 | /* no drive selected, needn't deselect anyone */ |
580 | return; |
581 | |
582 | if (stdma_islocked()) |
583 | goto retry; |
584 | |
585 | status = FDC_READ( FDCREG_STATUS ); |
586 | |
587 | if (!(status & 0x80)) { |
588 | /* motor already turned off by FDC -> deselect drives */ |
589 | MotorOn = 0; |
590 | fd_deselect(); |
591 | return; |
592 | } |
593 | /* not yet off, try again */ |
594 | |
595 | retry: |
596 | /* Test again later; if tested too often, it seems there is no disk |
597 | * in the drive and the FDC will leave the motor on forever (or, |
598 | * at least until a disk is inserted). So we'll test only twice |
599 | * per second from then on... |
600 | */ |
601 | mod_timer(timer: &motor_off_timer, |
602 | expires: jiffies + (MotorOffTrys++ < FD_MOTOR_OFF_MAXTRY ? HZ/20 : HZ/2)); |
603 | } |
604 | |
605 | |
606 | /* This function is repeatedly called to detect disk changes (as good |
607 | * as possible) and keep track of the current state of the write protection. |
608 | */ |
609 | |
610 | static void check_change(struct timer_list *unused) |
611 | { |
612 | static int drive = 0; |
613 | |
614 | unsigned long flags; |
615 | unsigned char old_porta; |
616 | int stat; |
617 | |
618 | if (++drive > 1 || !UD.connected) |
619 | drive = 0; |
620 | |
621 | /* protect against various other ints mucking around with the PSG */ |
622 | local_irq_save(flags); |
623 | |
624 | if (!stdma_islocked()) { |
625 | sound_ym.rd_data_reg_sel = 14; |
626 | old_porta = sound_ym.rd_data_reg_sel; |
627 | sound_ym.wd_data = (old_porta | DSKDRVNONE) & |
628 | ~(drive == 0 ? DSKDRV0 : DSKDRV1); |
629 | stat = !!(FDC_READ( FDCREG_STATUS ) & FDCSTAT_WPROT); |
630 | sound_ym.wd_data = old_porta; |
631 | |
632 | if (stat != UD.wpstat) { |
633 | DPRINT(( "wpstat[%d] = %d\n" , drive, stat )); |
634 | UD.wpstat = stat; |
635 | set_bit (nr: drive, addr: &changed_floppies); |
636 | } |
637 | } |
638 | local_irq_restore(flags); |
639 | |
640 | start_check_change_timer(); |
641 | } |
642 | |
643 | |
644 | /* Handling of the Head Settling Flag: This flag should be set after each |
645 | * seek operation, because we don't use seeks with verify. |
646 | */ |
647 | |
648 | static inline void set_head_settle_flag(void) |
649 | { |
650 | HeadSettleFlag = FDCCMDADD_E; |
651 | } |
652 | |
653 | static inline int get_head_settle_flag(void) |
654 | { |
655 | int tmp = HeadSettleFlag; |
656 | HeadSettleFlag = 0; |
657 | return( tmp ); |
658 | } |
659 | |
660 | static inline void copy_buffer(void *from, void *to) |
661 | { |
662 | ulong *p1 = (ulong *)from, *p2 = (ulong *)to; |
663 | int cnt; |
664 | |
665 | for (cnt = 512/4; cnt; cnt--) |
666 | *p2++ = *p1++; |
667 | } |
668 | |
669 | /* General Interrupt Handling */ |
670 | |
671 | static void (*FloppyIRQHandler)( int status ) = NULL; |
672 | |
673 | static irqreturn_t floppy_irq (int irq, void *dummy) |
674 | { |
675 | unsigned char status; |
676 | void (*handler)( int ); |
677 | |
678 | handler = xchg(&FloppyIRQHandler, NULL); |
679 | |
680 | if (handler) { |
681 | nop(); |
682 | status = FDC_READ( FDCREG_STATUS ); |
683 | DPRINT(("FDC irq, status = %02x handler = %08lx\n" ,status,(unsigned long)handler)); |
684 | handler( status ); |
685 | } |
686 | else { |
687 | DPRINT(("FDC irq, no handler\n" )); |
688 | } |
689 | return IRQ_HANDLED; |
690 | } |
691 | |
692 | |
693 | /* Error handling: If some error happened, retry some times, then |
694 | * recalibrate, then try again, and fail after MAX_ERRORS. |
695 | */ |
696 | |
697 | static void fd_error( void ) |
698 | { |
699 | if (IsFormatting) { |
700 | IsFormatting = 0; |
701 | FormatError = 1; |
702 | complete(&format_wait); |
703 | return; |
704 | } |
705 | |
706 | if (!fd_request) |
707 | return; |
708 | |
709 | unit[SelectedDrive].error_count++; |
710 | if (unit[SelectedDrive].error_count >= MAX_ERRORS) { |
711 | printk(KERN_ERR "fd%d: too many errors.\n" , SelectedDrive ); |
712 | fd_end_request_cur(BLK_STS_IOERR); |
713 | finish_fdc(); |
714 | return; |
715 | } |
716 | else if (unit[SelectedDrive].error_count == RECALIBRATE_ERRORS) { |
717 | printk(KERN_WARNING "fd%d: recalibrating\n" , SelectedDrive ); |
718 | if (SelectedDrive != -1) |
719 | SUD.track = -1; |
720 | } |
721 | /* need to re-run request to recalibrate */ |
722 | atari_disable_irq( IRQ_MFP_FDC ); |
723 | |
724 | setup_req_params( SelectedDrive ); |
725 | do_fd_action( drive: SelectedDrive ); |
726 | |
727 | atari_enable_irq( IRQ_MFP_FDC ); |
728 | } |
729 | |
730 | |
731 | |
732 | #define SET_IRQ_HANDLER(proc) do { FloppyIRQHandler = (proc); } while(0) |
733 | |
734 | |
735 | /* ---------- Formatting ---------- */ |
736 | |
737 | #define FILL(n,val) \ |
738 | do { \ |
739 | memset( p, val, n ); \ |
740 | p += n; \ |
741 | } while(0) |
742 | |
743 | static int do_format(int drive, int type, struct atari_format_descr *desc) |
744 | { |
745 | struct request_queue *q; |
746 | unsigned char *p; |
747 | int sect, nsect; |
748 | unsigned long flags; |
749 | int ret; |
750 | |
751 | if (type) { |
752 | type--; |
753 | if (type >= NUM_DISK_MINORS || |
754 | minor2disktype[type].drive_types > DriveType) { |
755 | finish_fdc(); |
756 | return -EINVAL; |
757 | } |
758 | } |
759 | |
760 | q = unit[drive].disk[type]->queue; |
761 | blk_mq_freeze_queue(q); |
762 | blk_mq_quiesce_queue(q); |
763 | |
764 | local_irq_save(flags); |
765 | stdma_lock(floppy_irq, NULL); |
766 | atari_turnon_irq( IRQ_MFP_FDC ); /* should be already, just to be sure */ |
767 | local_irq_restore(flags); |
768 | |
769 | if (type) { |
770 | type = minor2disktype[type].index; |
771 | UDT = &atari_disk_type[type]; |
772 | } |
773 | |
774 | if (!UDT || desc->track >= UDT->blocks/UDT->spt/2 || desc->head >= 2) { |
775 | finish_fdc(); |
776 | ret = -EINVAL; |
777 | goto out; |
778 | } |
779 | |
780 | nsect = UDT->spt; |
781 | p = TrackBuffer; |
782 | /* The track buffer is used for the raw track data, so its |
783 | contents become invalid! */ |
784 | BufferDrive = -1; |
785 | /* stop deselect timer */ |
786 | del_timer( timer: &motor_off_timer ); |
787 | |
788 | FILL( 60 * (nsect / 9), 0x4e ); |
789 | for( sect = 0; sect < nsect; ++sect ) { |
790 | FILL( 12, 0 ); |
791 | FILL( 3, 0xf5 ); |
792 | *p++ = 0xfe; |
793 | *p++ = desc->track; |
794 | *p++ = desc->head; |
795 | *p++ = (nsect + sect - desc->sect_offset) % nsect + 1; |
796 | *p++ = 2; |
797 | *p++ = 0xf7; |
798 | FILL( 22, 0x4e ); |
799 | FILL( 12, 0 ); |
800 | FILL( 3, 0xf5 ); |
801 | *p++ = 0xfb; |
802 | FILL( 512, 0xe5 ); |
803 | *p++ = 0xf7; |
804 | FILL( 40, 0x4e ); |
805 | } |
806 | FILL( TrackBuffer+BUFFER_SIZE-p, 0x4e ); |
807 | |
808 | IsFormatting = 1; |
809 | FormatError = 0; |
810 | ReqTrack = desc->track; |
811 | ReqSide = desc->head; |
812 | do_fd_action( drive ); |
813 | |
814 | wait_for_completion(&format_wait); |
815 | |
816 | finish_fdc(); |
817 | ret = FormatError ? -EIO : 0; |
818 | out: |
819 | blk_mq_unquiesce_queue(q); |
820 | blk_mq_unfreeze_queue(q); |
821 | return ret; |
822 | } |
823 | |
824 | |
825 | /* do_fd_action() is the general procedure for a fd request: All |
826 | * required parameter settings (drive select, side select, track |
827 | * position) are checked and set if needed. For each of these |
828 | * parameters and the actual reading or writing exist two functions: |
829 | * one that starts the setting (or skips it if possible) and one |
830 | * callback for the "done" interrupt. Each done func calls the next |
831 | * set function to propagate the request down to fd_rwsec_done(). |
832 | */ |
833 | |
834 | static void do_fd_action( int drive ) |
835 | { |
836 | DPRINT(("do_fd_action\n" )); |
837 | |
838 | if (UseTrackbuffer && !IsFormatting) { |
839 | repeat: |
840 | if (IS_BUFFERED( drive, ReqSide, ReqTrack )) { |
841 | if (ReqCmd == READ) { |
842 | copy_buffer( SECTOR_BUFFER(ReqSector), to: ReqData ); |
843 | if (++ReqCnt < blk_rq_cur_sectors(rq: fd_request)) { |
844 | /* read next sector */ |
845 | setup_req_params( drive ); |
846 | goto repeat; |
847 | } |
848 | else { |
849 | /* all sectors finished */ |
850 | fd_end_request_cur(BLK_STS_OK); |
851 | finish_fdc(); |
852 | return; |
853 | } |
854 | } |
855 | else { |
856 | /* cmd == WRITE, pay attention to track buffer |
857 | * consistency! */ |
858 | copy_buffer( from: ReqData, SECTOR_BUFFER(ReqSector) ); |
859 | } |
860 | } |
861 | } |
862 | |
863 | if (SelectedDrive != drive) |
864 | fd_select_drive( drive ); |
865 | |
866 | if (UD.track == -1) |
867 | fd_calibrate(); |
868 | else if (UD.track != ReqTrack << UDT->stretch) |
869 | fd_seek(); |
870 | else if (IsFormatting) |
871 | fd_writetrack(); |
872 | else |
873 | fd_rwsec(); |
874 | } |
875 | |
876 | |
877 | /* Seek to track 0 if the current track is unknown */ |
878 | |
879 | static void fd_calibrate( void ) |
880 | { |
881 | if (SUD.track >= 0) { |
882 | fd_calibrate_done( status: 0 ); |
883 | return; |
884 | } |
885 | |
886 | if (ATARIHW_PRESENT(FDCSPEED)) |
887 | dma_wd.fdc_speed = 0; /* always seek with 8 Mhz */ |
888 | DPRINT(("fd_calibrate\n" )); |
889 | SET_IRQ_HANDLER( fd_calibrate_done ); |
890 | /* we can't verify, since the speed may be incorrect */ |
891 | FDC_WRITE( FDCREG_CMD, FDCCMD_RESTORE | SUD.steprate ); |
892 | |
893 | NeedSeek = 1; |
894 | MotorOn = 1; |
895 | start_timeout(); |
896 | /* wait for IRQ */ |
897 | } |
898 | |
899 | |
900 | static void fd_calibrate_done( int status ) |
901 | { |
902 | DPRINT(("fd_calibrate_done()\n" )); |
903 | stop_timeout(); |
904 | |
905 | /* set the correct speed now */ |
906 | if (ATARIHW_PRESENT(FDCSPEED)) |
907 | dma_wd.fdc_speed = SUDT->fdc_speed; |
908 | if (status & FDCSTAT_RECNF) { |
909 | printk(KERN_ERR "fd%d: restore failed\n" , SelectedDrive ); |
910 | fd_error(); |
911 | } |
912 | else { |
913 | SUD.track = 0; |
914 | fd_seek(); |
915 | } |
916 | } |
917 | |
918 | |
919 | /* Seek the drive to the requested track. The drive must have been |
920 | * calibrated at some point before this. |
921 | */ |
922 | |
923 | static void fd_seek( void ) |
924 | { |
925 | if (SUD.track == ReqTrack << SUDT->stretch) { |
926 | fd_seek_done( status: 0 ); |
927 | return; |
928 | } |
929 | |
930 | if (ATARIHW_PRESENT(FDCSPEED)) { |
931 | dma_wd.fdc_speed = 0; /* always seek witch 8 Mhz */ |
932 | MFPDELAY(); |
933 | } |
934 | |
935 | DPRINT(("fd_seek() to track %d\n" ,ReqTrack)); |
936 | FDC_WRITE( FDCREG_DATA, ReqTrack << SUDT->stretch); |
937 | udelay(25); |
938 | SET_IRQ_HANDLER( fd_seek_done ); |
939 | FDC_WRITE( FDCREG_CMD, FDCCMD_SEEK | SUD.steprate ); |
940 | |
941 | MotorOn = 1; |
942 | set_head_settle_flag(); |
943 | start_timeout(); |
944 | /* wait for IRQ */ |
945 | } |
946 | |
947 | |
948 | static void fd_seek_done( int status ) |
949 | { |
950 | DPRINT(("fd_seek_done()\n" )); |
951 | stop_timeout(); |
952 | |
953 | /* set the correct speed */ |
954 | if (ATARIHW_PRESENT(FDCSPEED)) |
955 | dma_wd.fdc_speed = SUDT->fdc_speed; |
956 | if (status & FDCSTAT_RECNF) { |
957 | printk(KERN_ERR "fd%d: seek error (to track %d)\n" , |
958 | SelectedDrive, ReqTrack ); |
959 | /* we don't know exactly which track we are on now! */ |
960 | SUD.track = -1; |
961 | fd_error(); |
962 | } |
963 | else { |
964 | SUD.track = ReqTrack << SUDT->stretch; |
965 | NeedSeek = 0; |
966 | if (IsFormatting) |
967 | fd_writetrack(); |
968 | else |
969 | fd_rwsec(); |
970 | } |
971 | } |
972 | |
973 | |
974 | /* This does the actual reading/writing after positioning the head |
975 | * over the correct track. |
976 | */ |
977 | |
978 | static int MultReadInProgress = 0; |
979 | |
980 | |
981 | static void fd_rwsec( void ) |
982 | { |
983 | unsigned long paddr, flags; |
984 | unsigned int rwflag, old_motoron; |
985 | unsigned int track; |
986 | |
987 | DPRINT(("fd_rwsec(), Sec=%d, Access=%c\n" ,ReqSector, ReqCmd == WRITE ? 'w' : 'r' )); |
988 | if (ReqCmd == WRITE) { |
989 | if (ATARIHW_PRESENT(EXTD_DMA)) { |
990 | paddr = virt_to_phys(address: ReqData); |
991 | } |
992 | else { |
993 | copy_buffer( from: ReqData, to: DMABuffer ); |
994 | paddr = PhysDMABuffer; |
995 | } |
996 | dma_cache_maintenance( paddr, 512, 1 ); |
997 | rwflag = 0x100; |
998 | } |
999 | else { |
1000 | if (read_track) |
1001 | paddr = PhysTrackBuffer; |
1002 | else |
1003 | paddr = ATARIHW_PRESENT(EXTD_DMA) ? |
1004 | virt_to_phys(ReqData) : PhysDMABuffer; |
1005 | rwflag = 0; |
1006 | } |
1007 | |
1008 | fd_select_side( side: ReqSide ); |
1009 | |
1010 | /* Start sector of this operation */ |
1011 | FDC_WRITE( FDCREG_SECTOR, read_track ? 1 : ReqSector ); |
1012 | MFPDELAY(); |
1013 | /* Cheat for track if stretch != 0 */ |
1014 | if (SUDT->stretch) { |
1015 | track = FDC_READ( FDCREG_TRACK); |
1016 | MFPDELAY(); |
1017 | FDC_WRITE( FDCREG_TRACK, track >> SUDT->stretch); |
1018 | } |
1019 | udelay(25); |
1020 | |
1021 | /* Setup DMA */ |
1022 | local_irq_save(flags); |
1023 | dma_wd.dma_lo = (unsigned char)paddr; |
1024 | MFPDELAY(); |
1025 | paddr >>= 8; |
1026 | dma_wd.dma_md = (unsigned char)paddr; |
1027 | MFPDELAY(); |
1028 | paddr >>= 8; |
1029 | if (ATARIHW_PRESENT(EXTD_DMA)) |
1030 | st_dma_ext_dmahi = (unsigned short)paddr; |
1031 | else |
1032 | dma_wd.dma_hi = (unsigned char)paddr; |
1033 | MFPDELAY(); |
1034 | local_irq_restore(flags); |
1035 | |
1036 | /* Clear FIFO and switch DMA to correct mode */ |
1037 | dma_wd.dma_mode_status = 0x90 | rwflag; |
1038 | MFPDELAY(); |
1039 | dma_wd.dma_mode_status = 0x90 | (rwflag ^ 0x100); |
1040 | MFPDELAY(); |
1041 | dma_wd.dma_mode_status = 0x90 | rwflag; |
1042 | MFPDELAY(); |
1043 | |
1044 | /* How many sectors for DMA */ |
1045 | dma_wd.fdc_acces_seccount = read_track ? SUDT->spt : 1; |
1046 | |
1047 | udelay(25); |
1048 | |
1049 | /* Start operation */ |
1050 | dma_wd.dma_mode_status = FDCSELREG_STP | rwflag; |
1051 | udelay(25); |
1052 | SET_IRQ_HANDLER( fd_rwsec_done ); |
1053 | dma_wd.fdc_acces_seccount = |
1054 | (get_head_settle_flag() | |
1055 | (rwflag ? FDCCMD_WRSEC : (FDCCMD_RDSEC | (read_track ? FDCCMDADD_M : 0)))); |
1056 | |
1057 | old_motoron = MotorOn; |
1058 | MotorOn = 1; |
1059 | NeedSeek = 1; |
1060 | /* wait for interrupt */ |
1061 | |
1062 | if (read_track) { |
1063 | /* If reading a whole track, wait about one disk rotation and |
1064 | * then check if all sectors are read. The FDC will even |
1065 | * search for the first non-existent sector and need 1 sec to |
1066 | * recognise that it isn't present :-( |
1067 | */ |
1068 | MultReadInProgress = 1; |
1069 | mod_timer(timer: &readtrack_timer, |
1070 | /* 1 rot. + 5 rot.s if motor was off */ |
1071 | expires: jiffies + HZ/5 + (old_motoron ? 0 : HZ)); |
1072 | } |
1073 | start_timeout(); |
1074 | } |
1075 | |
1076 | |
1077 | static void fd_readtrack_check(struct timer_list *unused) |
1078 | { |
1079 | unsigned long flags, addr, addr2; |
1080 | |
1081 | local_irq_save(flags); |
1082 | |
1083 | if (!MultReadInProgress) { |
1084 | /* This prevents a race condition that could arise if the |
1085 | * interrupt is triggered while the calling of this timer |
1086 | * callback function takes place. The IRQ function then has |
1087 | * already cleared 'MultReadInProgress' when flow of control |
1088 | * gets here. |
1089 | */ |
1090 | local_irq_restore(flags); |
1091 | return; |
1092 | } |
1093 | |
1094 | /* get the current DMA address */ |
1095 | /* ++ f.a. read twice to avoid being fooled by switcher */ |
1096 | addr = 0; |
1097 | do { |
1098 | addr2 = addr; |
1099 | addr = dma_wd.dma_lo & 0xff; |
1100 | MFPDELAY(); |
1101 | addr |= (dma_wd.dma_md & 0xff) << 8; |
1102 | MFPDELAY(); |
1103 | if (ATARIHW_PRESENT( EXTD_DMA )) |
1104 | addr |= (st_dma_ext_dmahi & 0xffff) << 16; |
1105 | else |
1106 | addr |= (dma_wd.dma_hi & 0xff) << 16; |
1107 | MFPDELAY(); |
1108 | } while(addr != addr2); |
1109 | |
1110 | if (addr >= PhysTrackBuffer + SUDT->spt*512) { |
1111 | /* already read enough data, force an FDC interrupt to stop |
1112 | * the read operation |
1113 | */ |
1114 | SET_IRQ_HANDLER( NULL ); |
1115 | MultReadInProgress = 0; |
1116 | local_irq_restore(flags); |
1117 | DPRINT(("fd_readtrack_check(): done\n" )); |
1118 | FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); |
1119 | udelay(25); |
1120 | |
1121 | /* No error until now -- the FDC would have interrupted |
1122 | * otherwise! |
1123 | */ |
1124 | fd_rwsec_done1(status: 0); |
1125 | } |
1126 | else { |
1127 | /* not yet finished, wait another tenth rotation */ |
1128 | local_irq_restore(flags); |
1129 | DPRINT(("fd_readtrack_check(): not yet finished\n" )); |
1130 | mod_timer(timer: &readtrack_timer, expires: jiffies + HZ/5/10); |
1131 | } |
1132 | } |
1133 | |
1134 | |
1135 | static void fd_rwsec_done( int status ) |
1136 | { |
1137 | DPRINT(("fd_rwsec_done()\n" )); |
1138 | |
1139 | if (read_track) { |
1140 | del_timer(timer: &readtrack_timer); |
1141 | if (!MultReadInProgress) |
1142 | return; |
1143 | MultReadInProgress = 0; |
1144 | } |
1145 | fd_rwsec_done1(status); |
1146 | } |
1147 | |
1148 | static void fd_rwsec_done1(int status) |
1149 | { |
1150 | unsigned int track; |
1151 | |
1152 | stop_timeout(); |
1153 | |
1154 | /* Correct the track if stretch != 0 */ |
1155 | if (SUDT->stretch) { |
1156 | track = FDC_READ( FDCREG_TRACK); |
1157 | MFPDELAY(); |
1158 | FDC_WRITE( FDCREG_TRACK, track << SUDT->stretch); |
1159 | } |
1160 | |
1161 | if (!UseTrackbuffer) { |
1162 | dma_wd.dma_mode_status = 0x90; |
1163 | MFPDELAY(); |
1164 | if (!(dma_wd.dma_mode_status & 0x01)) { |
1165 | printk(KERN_ERR "fd%d: DMA error\n" , SelectedDrive ); |
1166 | goto err_end; |
1167 | } |
1168 | } |
1169 | MFPDELAY(); |
1170 | |
1171 | if (ReqCmd == WRITE && (status & FDCSTAT_WPROT)) { |
1172 | printk(KERN_NOTICE "fd%d: is write protected\n" , SelectedDrive ); |
1173 | goto err_end; |
1174 | } |
1175 | if ((status & FDCSTAT_RECNF) && |
1176 | /* RECNF is no error after a multiple read when the FDC |
1177 | searched for a non-existent sector! */ |
1178 | !(read_track && FDC_READ(FDCREG_SECTOR) > SUDT->spt)) { |
1179 | if (Probing) { |
1180 | if (SUDT > atari_disk_type) { |
1181 | if (SUDT[-1].blocks > ReqBlock) { |
1182 | /* try another disk type */ |
1183 | SUDT--; |
1184 | set_capacity(disk: unit[SelectedDrive].disk[0], |
1185 | SUDT->blocks); |
1186 | } else |
1187 | Probing = 0; |
1188 | } |
1189 | else { |
1190 | if (SUD.flags & FTD_MSG) |
1191 | printk(KERN_INFO "fd%d: Auto-detected floppy type %s\n" , |
1192 | SelectedDrive, SUDT->name ); |
1193 | Probing=0; |
1194 | } |
1195 | } else { |
1196 | /* record not found, but not probing. Maybe stretch wrong ? Restart probing */ |
1197 | if (SUD.autoprobe) { |
1198 | SUDT = atari_disk_type + StartDiskType[DriveType]; |
1199 | set_capacity(disk: unit[SelectedDrive].disk[0], |
1200 | SUDT->blocks); |
1201 | Probing = 1; |
1202 | } |
1203 | } |
1204 | if (Probing) { |
1205 | if (ATARIHW_PRESENT(FDCSPEED)) { |
1206 | dma_wd.fdc_speed = SUDT->fdc_speed; |
1207 | MFPDELAY(); |
1208 | } |
1209 | setup_req_params( SelectedDrive ); |
1210 | BufferDrive = -1; |
1211 | do_fd_action( drive: SelectedDrive ); |
1212 | return; |
1213 | } |
1214 | |
1215 | printk(KERN_ERR "fd%d: sector %d not found (side %d, track %d)\n" , |
1216 | SelectedDrive, FDC_READ (FDCREG_SECTOR), ReqSide, ReqTrack ); |
1217 | goto err_end; |
1218 | } |
1219 | if (status & FDCSTAT_CRC) { |
1220 | printk(KERN_ERR "fd%d: CRC error (side %d, track %d, sector %d)\n" , |
1221 | SelectedDrive, ReqSide, ReqTrack, FDC_READ (FDCREG_SECTOR) ); |
1222 | goto err_end; |
1223 | } |
1224 | if (status & FDCSTAT_LOST) { |
1225 | printk(KERN_ERR "fd%d: lost data (side %d, track %d, sector %d)\n" , |
1226 | SelectedDrive, ReqSide, ReqTrack, FDC_READ (FDCREG_SECTOR) ); |
1227 | goto err_end; |
1228 | } |
1229 | |
1230 | Probing = 0; |
1231 | |
1232 | if (ReqCmd == READ) { |
1233 | if (!read_track) { |
1234 | void *addr; |
1235 | addr = ATARIHW_PRESENT( EXTD_DMA ) ? ReqData : DMABuffer; |
1236 | dma_cache_maintenance( virt_to_phys(address: addr), 512, 0 ); |
1237 | if (!ATARIHW_PRESENT( EXTD_DMA )) |
1238 | copy_buffer (from: addr, to: ReqData); |
1239 | } else { |
1240 | dma_cache_maintenance( PhysTrackBuffer, MaxSectors[DriveType] * 512, 0 ); |
1241 | BufferDrive = SelectedDrive; |
1242 | BufferSide = ReqSide; |
1243 | BufferTrack = ReqTrack; |
1244 | copy_buffer (SECTOR_BUFFER (ReqSector), to: ReqData); |
1245 | } |
1246 | } |
1247 | |
1248 | if (++ReqCnt < blk_rq_cur_sectors(rq: fd_request)) { |
1249 | /* read next sector */ |
1250 | setup_req_params( SelectedDrive ); |
1251 | do_fd_action( drive: SelectedDrive ); |
1252 | } |
1253 | else { |
1254 | /* all sectors finished */ |
1255 | fd_end_request_cur(BLK_STS_OK); |
1256 | finish_fdc(); |
1257 | } |
1258 | return; |
1259 | |
1260 | err_end: |
1261 | BufferDrive = -1; |
1262 | fd_error(); |
1263 | } |
1264 | |
1265 | |
1266 | static void fd_writetrack( void ) |
1267 | { |
1268 | unsigned long paddr, flags; |
1269 | unsigned int track; |
1270 | |
1271 | DPRINT(("fd_writetrack() Tr=%d Si=%d\n" , ReqTrack, ReqSide )); |
1272 | |
1273 | paddr = PhysTrackBuffer; |
1274 | dma_cache_maintenance( paddr, BUFFER_SIZE, 1 ); |
1275 | |
1276 | fd_select_side( side: ReqSide ); |
1277 | |
1278 | /* Cheat for track if stretch != 0 */ |
1279 | if (SUDT->stretch) { |
1280 | track = FDC_READ( FDCREG_TRACK); |
1281 | MFPDELAY(); |
1282 | FDC_WRITE(FDCREG_TRACK,track >> SUDT->stretch); |
1283 | } |
1284 | udelay(40); |
1285 | |
1286 | /* Setup DMA */ |
1287 | local_irq_save(flags); |
1288 | dma_wd.dma_lo = (unsigned char)paddr; |
1289 | MFPDELAY(); |
1290 | paddr >>= 8; |
1291 | dma_wd.dma_md = (unsigned char)paddr; |
1292 | MFPDELAY(); |
1293 | paddr >>= 8; |
1294 | if (ATARIHW_PRESENT( EXTD_DMA )) |
1295 | st_dma_ext_dmahi = (unsigned short)paddr; |
1296 | else |
1297 | dma_wd.dma_hi = (unsigned char)paddr; |
1298 | MFPDELAY(); |
1299 | local_irq_restore(flags); |
1300 | |
1301 | /* Clear FIFO and switch DMA to correct mode */ |
1302 | dma_wd.dma_mode_status = 0x190; |
1303 | MFPDELAY(); |
1304 | dma_wd.dma_mode_status = 0x90; |
1305 | MFPDELAY(); |
1306 | dma_wd.dma_mode_status = 0x190; |
1307 | MFPDELAY(); |
1308 | |
1309 | /* How many sectors for DMA */ |
1310 | dma_wd.fdc_acces_seccount = BUFFER_SIZE/512; |
1311 | udelay(40); |
1312 | |
1313 | /* Start operation */ |
1314 | dma_wd.dma_mode_status = FDCSELREG_STP | 0x100; |
1315 | udelay(40); |
1316 | SET_IRQ_HANDLER( fd_writetrack_done ); |
1317 | dma_wd.fdc_acces_seccount = FDCCMD_WRTRA | get_head_settle_flag(); |
1318 | |
1319 | MotorOn = 1; |
1320 | start_timeout(); |
1321 | /* wait for interrupt */ |
1322 | } |
1323 | |
1324 | |
1325 | static void fd_writetrack_done( int status ) |
1326 | { |
1327 | DPRINT(("fd_writetrack_done()\n" )); |
1328 | |
1329 | stop_timeout(); |
1330 | |
1331 | if (status & FDCSTAT_WPROT) { |
1332 | printk(KERN_NOTICE "fd%d: is write protected\n" , SelectedDrive ); |
1333 | goto err_end; |
1334 | } |
1335 | if (status & FDCSTAT_LOST) { |
1336 | printk(KERN_ERR "fd%d: lost data (side %d, track %d)\n" , |
1337 | SelectedDrive, ReqSide, ReqTrack ); |
1338 | goto err_end; |
1339 | } |
1340 | |
1341 | complete(&format_wait); |
1342 | return; |
1343 | |
1344 | err_end: |
1345 | fd_error(); |
1346 | } |
1347 | |
1348 | static void fd_times_out(struct timer_list *unused) |
1349 | { |
1350 | atari_disable_irq( IRQ_MFP_FDC ); |
1351 | if (!FloppyIRQHandler) goto end; /* int occurred after timer was fired, but |
1352 | * before we came here... */ |
1353 | |
1354 | SET_IRQ_HANDLER( NULL ); |
1355 | /* If the timeout occurred while the readtrack_check timer was |
1356 | * active, we need to cancel it, else bad things will happen */ |
1357 | if (UseTrackbuffer) |
1358 | del_timer( timer: &readtrack_timer ); |
1359 | FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); |
1360 | udelay( 25 ); |
1361 | |
1362 | printk(KERN_ERR "floppy timeout\n" ); |
1363 | fd_error(); |
1364 | end: |
1365 | atari_enable_irq( IRQ_MFP_FDC ); |
1366 | } |
1367 | |
1368 | |
1369 | /* The (noop) seek operation here is needed to make the WP bit in the |
1370 | * FDC status register accessible for check_change. If the last disk |
1371 | * operation would have been a RDSEC, this bit would always read as 0 |
1372 | * no matter what :-( To save time, the seek goes to the track we're |
1373 | * already on. |
1374 | */ |
1375 | |
1376 | static void finish_fdc( void ) |
1377 | { |
1378 | if (!NeedSeek || !stdma_is_locked_by(floppy_irq)) { |
1379 | finish_fdc_done( dummy: 0 ); |
1380 | } |
1381 | else { |
1382 | DPRINT(("finish_fdc: dummy seek started\n" )); |
1383 | FDC_WRITE (FDCREG_DATA, SUD.track); |
1384 | SET_IRQ_HANDLER( finish_fdc_done ); |
1385 | FDC_WRITE (FDCREG_CMD, FDCCMD_SEEK); |
1386 | MotorOn = 1; |
1387 | start_timeout(); |
1388 | /* we must wait for the IRQ here, because the ST-DMA |
1389 | is released immediately afterwards and the interrupt |
1390 | may be delivered to the wrong driver. */ |
1391 | } |
1392 | } |
1393 | |
1394 | |
1395 | static void finish_fdc_done( int dummy ) |
1396 | { |
1397 | unsigned long flags; |
1398 | |
1399 | DPRINT(("finish_fdc_done entered\n" )); |
1400 | stop_timeout(); |
1401 | NeedSeek = 0; |
1402 | |
1403 | if (timer_pending(timer: &fd_timer) && time_before(fd_timer.expires, jiffies + 5)) |
1404 | /* If the check for a disk change is done too early after this |
1405 | * last seek command, the WP bit still reads wrong :-(( |
1406 | */ |
1407 | mod_timer(timer: &fd_timer, expires: jiffies + 5); |
1408 | else |
1409 | start_check_change_timer(); |
1410 | start_motor_off_timer(); |
1411 | |
1412 | local_irq_save(flags); |
1413 | if (stdma_is_locked_by(floppy_irq)) |
1414 | stdma_release(); |
1415 | local_irq_restore(flags); |
1416 | |
1417 | DPRINT(("finish_fdc() finished\n" )); |
1418 | } |
1419 | |
1420 | /* The detection of disk changes is a dark chapter in Atari history :-( |
1421 | * Because the "Drive ready" signal isn't present in the Atari |
1422 | * hardware, one has to rely on the "Write Protect". This works fine, |
1423 | * as long as no write protected disks are used. TOS solves this |
1424 | * problem by introducing tri-state logic ("maybe changed") and |
1425 | * looking at the serial number in block 0. This isn't possible for |
1426 | * Linux, since the floppy driver can't make assumptions about the |
1427 | * filesystem used on the disk and thus the contents of block 0. I've |
1428 | * chosen the method to always say "The disk was changed" if it is |
1429 | * unsure whether it was. This implies that every open or mount |
1430 | * invalidates the disk buffers if you work with write protected |
1431 | * disks. But at least this is better than working with incorrect data |
1432 | * due to unrecognised disk changes. |
1433 | */ |
1434 | |
1435 | static unsigned int floppy_check_events(struct gendisk *disk, |
1436 | unsigned int clearing) |
1437 | { |
1438 | struct atari_floppy_struct *p = disk->private_data; |
1439 | unsigned int drive = p - unit; |
1440 | if (test_bit (drive, &fake_change)) { |
1441 | /* simulated change (e.g. after formatting) */ |
1442 | return DISK_EVENT_MEDIA_CHANGE; |
1443 | } |
1444 | if (test_bit (drive, &changed_floppies)) { |
1445 | /* surely changed (the WP signal changed at least once) */ |
1446 | return DISK_EVENT_MEDIA_CHANGE; |
1447 | } |
1448 | if (UD.wpstat) { |
1449 | /* WP is on -> could be changed: to be sure, buffers should be |
1450 | * invalidated... |
1451 | */ |
1452 | return DISK_EVENT_MEDIA_CHANGE; |
1453 | } |
1454 | |
1455 | return 0; |
1456 | } |
1457 | |
1458 | static int floppy_revalidate(struct gendisk *disk) |
1459 | { |
1460 | struct atari_floppy_struct *p = disk->private_data; |
1461 | unsigned int drive = p - unit; |
1462 | |
1463 | if (test_bit(drive, &changed_floppies) || |
1464 | test_bit(drive, &fake_change) || !p->disktype) { |
1465 | if (UD.flags & FTD_MSG) |
1466 | printk(KERN_ERR "floppy: clear format %p!\n" , UDT); |
1467 | BufferDrive = -1; |
1468 | clear_bit(nr: drive, addr: &fake_change); |
1469 | clear_bit(nr: drive, addr: &changed_floppies); |
1470 | /* MSch: clearing geometry makes sense only for autoprobe |
1471 | formats, for 'permanent user-defined' parameter: |
1472 | restore default_params[] here if flagged valid! */ |
1473 | if (default_params[drive].blocks == 0) |
1474 | UDT = NULL; |
1475 | else |
1476 | UDT = &default_params[drive]; |
1477 | } |
1478 | return 0; |
1479 | } |
1480 | |
1481 | |
1482 | /* This sets up the global variables describing the current request. */ |
1483 | |
1484 | static void setup_req_params( int drive ) |
1485 | { |
1486 | int block = ReqBlock + ReqCnt; |
1487 | |
1488 | ReqTrack = block / UDT->spt; |
1489 | ReqSector = block - ReqTrack * UDT->spt + 1; |
1490 | ReqSide = ReqTrack & 1; |
1491 | ReqTrack >>= 1; |
1492 | ReqData = ReqBuffer + 512 * ReqCnt; |
1493 | |
1494 | if (UseTrackbuffer) |
1495 | read_track = (ReqCmd == READ && unit[drive].error_count == 0); |
1496 | else |
1497 | read_track = 0; |
1498 | |
1499 | DPRINT(("Request params: Si=%d Tr=%d Se=%d Data=%08lx\n" ,ReqSide, |
1500 | ReqTrack, ReqSector, (unsigned long)ReqData )); |
1501 | } |
1502 | |
1503 | static blk_status_t ataflop_queue_rq(struct blk_mq_hw_ctx *hctx, |
1504 | const struct blk_mq_queue_data *bd) |
1505 | { |
1506 | struct atari_floppy_struct *floppy = bd->rq->q->disk->private_data; |
1507 | int drive = floppy - unit; |
1508 | int type = floppy->type; |
1509 | |
1510 | DPRINT(("Queue request: drive %d type %d sectors %d of %d last %d\n" , |
1511 | drive, type, blk_rq_cur_sectors(bd->rq), |
1512 | blk_rq_sectors(bd->rq), bd->last)); |
1513 | |
1514 | spin_lock_irq(lock: &ataflop_lock); |
1515 | if (fd_request) { |
1516 | spin_unlock_irq(lock: &ataflop_lock); |
1517 | return BLK_STS_DEV_RESOURCE; |
1518 | } |
1519 | if (!stdma_try_lock(floppy_irq, NULL)) { |
1520 | spin_unlock_irq(lock: &ataflop_lock); |
1521 | return BLK_STS_RESOURCE; |
1522 | } |
1523 | fd_request = bd->rq; |
1524 | unit[drive].error_count = 0; |
1525 | blk_mq_start_request(rq: fd_request); |
1526 | |
1527 | atari_disable_irq( IRQ_MFP_FDC ); |
1528 | |
1529 | IsFormatting = 0; |
1530 | |
1531 | if (!UD.connected) { |
1532 | /* drive not connected */ |
1533 | printk(KERN_ERR "Unknown Device: fd%d\n" , drive ); |
1534 | fd_end_request_cur(BLK_STS_IOERR); |
1535 | stdma_release(); |
1536 | goto out; |
1537 | } |
1538 | |
1539 | if (type == 0) { |
1540 | if (!UDT) { |
1541 | Probing = 1; |
1542 | UDT = atari_disk_type + StartDiskType[DriveType]; |
1543 | set_capacity(disk: bd->rq->q->disk, UDT->blocks); |
1544 | UD.autoprobe = 1; |
1545 | } |
1546 | } |
1547 | else { |
1548 | /* user supplied disk type */ |
1549 | if (--type >= NUM_DISK_MINORS) { |
1550 | printk(KERN_WARNING "fd%d: invalid disk format" , drive ); |
1551 | fd_end_request_cur(BLK_STS_IOERR); |
1552 | stdma_release(); |
1553 | goto out; |
1554 | } |
1555 | if (minor2disktype[type].drive_types > DriveType) { |
1556 | printk(KERN_WARNING "fd%d: unsupported disk format" , drive ); |
1557 | fd_end_request_cur(BLK_STS_IOERR); |
1558 | stdma_release(); |
1559 | goto out; |
1560 | } |
1561 | type = minor2disktype[type].index; |
1562 | UDT = &atari_disk_type[type]; |
1563 | set_capacity(disk: bd->rq->q->disk, UDT->blocks); |
1564 | UD.autoprobe = 0; |
1565 | } |
1566 | |
1567 | /* stop deselect timer */ |
1568 | del_timer( timer: &motor_off_timer ); |
1569 | |
1570 | ReqCnt = 0; |
1571 | ReqCmd = rq_data_dir(fd_request); |
1572 | ReqBlock = blk_rq_pos(rq: fd_request); |
1573 | ReqBuffer = bio_data(bio: fd_request->bio); |
1574 | setup_req_params( drive ); |
1575 | do_fd_action( drive ); |
1576 | |
1577 | atari_enable_irq( IRQ_MFP_FDC ); |
1578 | |
1579 | out: |
1580 | spin_unlock_irq(lock: &ataflop_lock); |
1581 | return BLK_STS_OK; |
1582 | } |
1583 | |
1584 | static int fd_locked_ioctl(struct block_device *bdev, blk_mode_t mode, |
1585 | unsigned int cmd, unsigned long param) |
1586 | { |
1587 | struct gendisk *disk = bdev->bd_disk; |
1588 | struct atari_floppy_struct *floppy = disk->private_data; |
1589 | int drive = floppy - unit; |
1590 | int type = floppy->type; |
1591 | struct atari_format_descr fmt_desc; |
1592 | struct atari_disk_type *dtp; |
1593 | struct floppy_struct getprm; |
1594 | int settype; |
1595 | struct floppy_struct setprm; |
1596 | void __user *argp = (void __user *)param; |
1597 | |
1598 | switch (cmd) { |
1599 | case FDGETPRM: |
1600 | if (type) { |
1601 | if (--type >= NUM_DISK_MINORS) |
1602 | return -ENODEV; |
1603 | if (minor2disktype[type].drive_types > DriveType) |
1604 | return -ENODEV; |
1605 | type = minor2disktype[type].index; |
1606 | dtp = &atari_disk_type[type]; |
1607 | if (UD.flags & FTD_MSG) |
1608 | printk (KERN_ERR "floppy%d: found dtp %p name %s!\n" , |
1609 | drive, dtp, dtp->name); |
1610 | } |
1611 | else { |
1612 | if (!UDT) |
1613 | return -ENXIO; |
1614 | else |
1615 | dtp = UDT; |
1616 | } |
1617 | memset((void *)&getprm, 0, sizeof(getprm)); |
1618 | getprm.size = dtp->blocks; |
1619 | getprm.sect = dtp->spt; |
1620 | getprm.head = 2; |
1621 | getprm.track = dtp->blocks/dtp->spt/2; |
1622 | getprm.stretch = dtp->stretch; |
1623 | if (copy_to_user(to: argp, from: &getprm, n: sizeof(getprm))) |
1624 | return -EFAULT; |
1625 | return 0; |
1626 | } |
1627 | switch (cmd) { |
1628 | case FDSETPRM: |
1629 | case FDDEFPRM: |
1630 | /* |
1631 | * MSch 7/96: simple 'set geometry' case: just set the |
1632 | * 'default' device params (minor == 0). |
1633 | * Currently, the drive geometry is cleared after each |
1634 | * disk change and subsequent revalidate()! simple |
1635 | * implementation of FDDEFPRM: save geometry from a |
1636 | * FDDEFPRM call and restore it in floppy_revalidate() ! |
1637 | */ |
1638 | |
1639 | /* get the parameters from user space */ |
1640 | if (floppy->ref != 1 && floppy->ref != -1) |
1641 | return -EBUSY; |
1642 | if (copy_from_user(to: &setprm, from: argp, n: sizeof(setprm))) |
1643 | return -EFAULT; |
1644 | /* |
1645 | * first of all: check for floppy change and revalidate, |
1646 | * or the next access will revalidate - and clear UDT :-( |
1647 | */ |
1648 | |
1649 | if (floppy_check_events(disk, clearing: 0)) |
1650 | floppy_revalidate(disk); |
1651 | |
1652 | if (UD.flags & FTD_MSG) |
1653 | printk (KERN_INFO "floppy%d: setting size %d spt %d str %d!\n" , |
1654 | drive, setprm.size, setprm.sect, setprm.stretch); |
1655 | |
1656 | /* what if type > 0 here? Overwrite specified entry ? */ |
1657 | if (type) { |
1658 | /* refuse to re-set a predefined type for now */ |
1659 | finish_fdc(); |
1660 | return -EINVAL; |
1661 | } |
1662 | |
1663 | /* |
1664 | * type == 0: first look for a matching entry in the type list, |
1665 | * and set the UD.disktype field to use the perdefined entry. |
1666 | * TODO: add user-defined format to head of autoprobe list ? |
1667 | * Useful to include the user-type for future autodetection! |
1668 | */ |
1669 | |
1670 | for (settype = 0; settype < NUM_DISK_MINORS; settype++) { |
1671 | int setidx = 0; |
1672 | if (minor2disktype[settype].drive_types > DriveType) { |
1673 | /* skip this one, invalid for drive ... */ |
1674 | continue; |
1675 | } |
1676 | setidx = minor2disktype[settype].index; |
1677 | dtp = &atari_disk_type[setidx]; |
1678 | |
1679 | /* found matching entry ?? */ |
1680 | if ( dtp->blocks == setprm.size |
1681 | && dtp->spt == setprm.sect |
1682 | && dtp->stretch == setprm.stretch ) { |
1683 | if (UD.flags & FTD_MSG) |
1684 | printk (KERN_INFO "floppy%d: setting %s %p!\n" , |
1685 | drive, dtp->name, dtp); |
1686 | UDT = dtp; |
1687 | set_capacity(disk, UDT->blocks); |
1688 | |
1689 | if (cmd == FDDEFPRM) { |
1690 | /* save settings as permanent default type */ |
1691 | default_params[drive].name = dtp->name; |
1692 | default_params[drive].spt = dtp->spt; |
1693 | default_params[drive].blocks = dtp->blocks; |
1694 | default_params[drive].fdc_speed = dtp->fdc_speed; |
1695 | default_params[drive].stretch = dtp->stretch; |
1696 | } |
1697 | |
1698 | return 0; |
1699 | } |
1700 | |
1701 | } |
1702 | |
1703 | /* no matching disk type found above - setting user_params */ |
1704 | |
1705 | if (cmd == FDDEFPRM) { |
1706 | /* set permanent type */ |
1707 | dtp = &default_params[drive]; |
1708 | } else |
1709 | /* set user type (reset by disk change!) */ |
1710 | dtp = &user_params[drive]; |
1711 | |
1712 | dtp->name = "user format" ; |
1713 | dtp->blocks = setprm.size; |
1714 | dtp->spt = setprm.sect; |
1715 | if (setprm.sect > 14) |
1716 | dtp->fdc_speed = 3; |
1717 | else |
1718 | dtp->fdc_speed = 0; |
1719 | dtp->stretch = setprm.stretch; |
1720 | |
1721 | if (UD.flags & FTD_MSG) |
1722 | printk (KERN_INFO "floppy%d: blk %d spt %d str %d!\n" , |
1723 | drive, dtp->blocks, dtp->spt, dtp->stretch); |
1724 | |
1725 | /* sanity check */ |
1726 | if (setprm.track != dtp->blocks/dtp->spt/2 || |
1727 | setprm.head != 2) { |
1728 | finish_fdc(); |
1729 | return -EINVAL; |
1730 | } |
1731 | |
1732 | UDT = dtp; |
1733 | set_capacity(disk, UDT->blocks); |
1734 | |
1735 | return 0; |
1736 | case FDMSGON: |
1737 | UD.flags |= FTD_MSG; |
1738 | return 0; |
1739 | case FDMSGOFF: |
1740 | UD.flags &= ~FTD_MSG; |
1741 | return 0; |
1742 | case FDSETEMSGTRESH: |
1743 | return -EINVAL; |
1744 | case FDFMTBEG: |
1745 | return 0; |
1746 | case FDFMTTRK: |
1747 | if (floppy->ref != 1 && floppy->ref != -1) |
1748 | return -EBUSY; |
1749 | if (copy_from_user(to: &fmt_desc, from: argp, n: sizeof(fmt_desc))) |
1750 | return -EFAULT; |
1751 | return do_format(drive, type, desc: &fmt_desc); |
1752 | case FDCLRPRM: |
1753 | UDT = NULL; |
1754 | /* MSch: invalidate default_params */ |
1755 | default_params[drive].blocks = 0; |
1756 | set_capacity(disk, MAX_DISK_SIZE * 2); |
1757 | fallthrough; |
1758 | case FDFMTEND: |
1759 | case FDFLUSH: |
1760 | /* invalidate the buffer track to force a reread */ |
1761 | BufferDrive = -1; |
1762 | set_bit(nr: drive, addr: &fake_change); |
1763 | if (disk_check_media_change(disk)) { |
1764 | bdev_mark_dead(bdev: disk->part0, surprise: true); |
1765 | floppy_revalidate(disk); |
1766 | } |
1767 | return 0; |
1768 | default: |
1769 | return -EINVAL; |
1770 | } |
1771 | } |
1772 | |
1773 | static int fd_ioctl(struct block_device *bdev, blk_mode_t mode, |
1774 | unsigned int cmd, unsigned long arg) |
1775 | { |
1776 | int ret; |
1777 | |
1778 | mutex_lock(&ataflop_mutex); |
1779 | ret = fd_locked_ioctl(bdev, mode, cmd, param: arg); |
1780 | mutex_unlock(lock: &ataflop_mutex); |
1781 | |
1782 | return ret; |
1783 | } |
1784 | |
1785 | /* Initialize the 'unit' variable for drive 'drive' */ |
1786 | |
1787 | static void __init fd_probe( int drive ) |
1788 | { |
1789 | UD.connected = 0; |
1790 | UDT = NULL; |
1791 | |
1792 | if (!fd_test_drive_present( drive )) |
1793 | return; |
1794 | |
1795 | UD.connected = 1; |
1796 | UD.track = 0; |
1797 | switch( UserSteprate[drive] ) { |
1798 | case 2: |
1799 | UD.steprate = FDCSTEP_2; |
1800 | break; |
1801 | case 3: |
1802 | UD.steprate = FDCSTEP_3; |
1803 | break; |
1804 | case 6: |
1805 | UD.steprate = FDCSTEP_6; |
1806 | break; |
1807 | case 12: |
1808 | UD.steprate = FDCSTEP_12; |
1809 | break; |
1810 | default: /* should be -1 for "not set by user" */ |
1811 | if (ATARIHW_PRESENT( FDCSPEED ) || MACH_IS_MEDUSA) |
1812 | UD.steprate = FDCSTEP_3; |
1813 | else |
1814 | UD.steprate = FDCSTEP_6; |
1815 | break; |
1816 | } |
1817 | MotorOn = 1; /* from probe restore operation! */ |
1818 | } |
1819 | |
1820 | |
1821 | /* This function tests the physical presence of a floppy drive (not |
1822 | * whether a disk is inserted). This is done by issuing a restore |
1823 | * command, waiting max. 2 seconds (that should be enough to move the |
1824 | * head across the whole disk) and looking at the state of the "TR00" |
1825 | * signal. This should now be raised if there is a drive connected |
1826 | * (and there is no hardware failure :-) Otherwise, the drive is |
1827 | * declared absent. |
1828 | */ |
1829 | |
1830 | static int __init fd_test_drive_present( int drive ) |
1831 | { |
1832 | unsigned long timeout; |
1833 | unsigned char status; |
1834 | int ok; |
1835 | |
1836 | if (drive >= (MACH_IS_FALCON ? 1 : 2)) return( 0 ); |
1837 | fd_select_drive( drive ); |
1838 | |
1839 | /* disable interrupt temporarily */ |
1840 | atari_turnoff_irq( IRQ_MFP_FDC ); |
1841 | FDC_WRITE (FDCREG_TRACK, 0xff00); |
1842 | FDC_WRITE( FDCREG_CMD, FDCCMD_RESTORE | FDCCMDADD_H | FDCSTEP_6 ); |
1843 | |
1844 | timeout = jiffies + 2*HZ+HZ/2; |
1845 | while (time_before(jiffies, timeout)) |
1846 | if (!(st_mfp.par_dt_reg & 0x20)) |
1847 | break; |
1848 | |
1849 | status = FDC_READ( FDCREG_STATUS ); |
1850 | ok = (status & FDCSTAT_TR00) != 0; |
1851 | |
1852 | /* force interrupt to abort restore operation (FDC would try |
1853 | * about 50 seconds!) */ |
1854 | FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); |
1855 | udelay(500); |
1856 | status = FDC_READ( FDCREG_STATUS ); |
1857 | udelay(20); |
1858 | |
1859 | if (ok) { |
1860 | /* dummy seek command to make WP bit accessible */ |
1861 | FDC_WRITE( FDCREG_DATA, 0 ); |
1862 | FDC_WRITE( FDCREG_CMD, FDCCMD_SEEK ); |
1863 | while( st_mfp.par_dt_reg & 0x20 ) |
1864 | ; |
1865 | status = FDC_READ( FDCREG_STATUS ); |
1866 | } |
1867 | |
1868 | atari_turnon_irq( IRQ_MFP_FDC ); |
1869 | return( ok ); |
1870 | } |
1871 | |
1872 | |
1873 | /* Look how many and which kind of drives are connected. If there are |
1874 | * floppies, additionally start the disk-change and motor-off timers. |
1875 | */ |
1876 | |
1877 | static void __init config_types( void ) |
1878 | { |
1879 | int drive, cnt = 0; |
1880 | |
1881 | /* for probing drives, set the FDC speed to 8 MHz */ |
1882 | if (ATARIHW_PRESENT(FDCSPEED)) |
1883 | dma_wd.fdc_speed = 0; |
1884 | |
1885 | printk(KERN_INFO "Probing floppy drive(s):\n" ); |
1886 | for( drive = 0; drive < FD_MAX_UNITS; drive++ ) { |
1887 | fd_probe( drive ); |
1888 | if (UD.connected) { |
1889 | printk(KERN_INFO "fd%d\n" , drive); |
1890 | ++cnt; |
1891 | } |
1892 | } |
1893 | |
1894 | if (FDC_READ( FDCREG_STATUS ) & FDCSTAT_BUSY) { |
1895 | /* If FDC is still busy from probing, give it another FORCI |
1896 | * command to abort the operation. If this isn't done, the FDC |
1897 | * will interrupt later and its IRQ line stays low, because |
1898 | * the status register isn't read. And this will block any |
1899 | * interrupts on this IRQ line :-( |
1900 | */ |
1901 | FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); |
1902 | udelay(500); |
1903 | FDC_READ( FDCREG_STATUS ); |
1904 | udelay(20); |
1905 | } |
1906 | |
1907 | if (cnt > 0) { |
1908 | start_motor_off_timer(); |
1909 | if (cnt == 1) fd_select_drive( drive: 0 ); |
1910 | start_check_change_timer(); |
1911 | } |
1912 | } |
1913 | |
1914 | /* |
1915 | * floppy_open check for aliasing (/dev/fd0 can be the same as |
1916 | * /dev/PS0 etc), and disallows simultaneous access to the same |
1917 | * drive with different device numbers. |
1918 | */ |
1919 | |
1920 | static int floppy_open(struct gendisk *disk, blk_mode_t mode) |
1921 | { |
1922 | struct atari_floppy_struct *p = disk->private_data; |
1923 | int type = disk->first_minor >> 2; |
1924 | |
1925 | DPRINT(("fd_open: type=%d\n" ,type)); |
1926 | if (p->ref && p->type != type) |
1927 | return -EBUSY; |
1928 | |
1929 | if (p->ref == -1 || (p->ref && mode & BLK_OPEN_EXCL)) |
1930 | return -EBUSY; |
1931 | if (mode & BLK_OPEN_EXCL) |
1932 | p->ref = -1; |
1933 | else |
1934 | p->ref++; |
1935 | |
1936 | p->type = type; |
1937 | |
1938 | if (mode & BLK_OPEN_NDELAY) |
1939 | return 0; |
1940 | |
1941 | if (mode & (BLK_OPEN_READ | BLK_OPEN_WRITE)) { |
1942 | if (disk_check_media_change(disk)) |
1943 | floppy_revalidate(disk); |
1944 | if (mode & BLK_OPEN_WRITE) { |
1945 | if (p->wpstat) { |
1946 | if (p->ref < 0) |
1947 | p->ref = 0; |
1948 | else |
1949 | p->ref--; |
1950 | return -EROFS; |
1951 | } |
1952 | } |
1953 | } |
1954 | return 0; |
1955 | } |
1956 | |
1957 | static int floppy_unlocked_open(struct gendisk *disk, blk_mode_t mode) |
1958 | { |
1959 | int ret; |
1960 | |
1961 | mutex_lock(&ataflop_mutex); |
1962 | ret = floppy_open(disk, mode); |
1963 | mutex_unlock(lock: &ataflop_mutex); |
1964 | |
1965 | return ret; |
1966 | } |
1967 | |
1968 | static void floppy_release(struct gendisk *disk) |
1969 | { |
1970 | struct atari_floppy_struct *p = disk->private_data; |
1971 | mutex_lock(&ataflop_mutex); |
1972 | if (p->ref < 0) |
1973 | p->ref = 0; |
1974 | else if (!p->ref--) { |
1975 | printk(KERN_ERR "floppy_release with fd_ref == 0" ); |
1976 | p->ref = 0; |
1977 | } |
1978 | mutex_unlock(lock: &ataflop_mutex); |
1979 | } |
1980 | |
1981 | static const struct block_device_operations floppy_fops = { |
1982 | .owner = THIS_MODULE, |
1983 | .open = floppy_unlocked_open, |
1984 | .release = floppy_release, |
1985 | .ioctl = fd_ioctl, |
1986 | .check_events = floppy_check_events, |
1987 | }; |
1988 | |
1989 | static const struct blk_mq_ops ataflop_mq_ops = { |
1990 | .queue_rq = ataflop_queue_rq, |
1991 | }; |
1992 | |
1993 | static int ataflop_alloc_disk(unsigned int drive, unsigned int type) |
1994 | { |
1995 | struct gendisk *disk; |
1996 | |
1997 | disk = blk_mq_alloc_disk(&unit[drive].tag_set, NULL); |
1998 | if (IS_ERR(ptr: disk)) |
1999 | return PTR_ERR(ptr: disk); |
2000 | |
2001 | disk->major = FLOPPY_MAJOR; |
2002 | disk->first_minor = drive + (type << 2); |
2003 | disk->minors = 1; |
2004 | sprintf(buf: disk->disk_name, fmt: "fd%d" , drive); |
2005 | disk->fops = &floppy_fops; |
2006 | disk->flags |= GENHD_FL_NO_PART; |
2007 | disk->events = DISK_EVENT_MEDIA_CHANGE; |
2008 | disk->private_data = &unit[drive]; |
2009 | set_capacity(disk, MAX_DISK_SIZE * 2); |
2010 | |
2011 | unit[drive].disk[type] = disk; |
2012 | return 0; |
2013 | } |
2014 | |
2015 | static void ataflop_probe(dev_t dev) |
2016 | { |
2017 | int drive = MINOR(dev) & 3; |
2018 | int type = MINOR(dev) >> 2; |
2019 | |
2020 | if (type) |
2021 | type--; |
2022 | |
2023 | if (drive >= FD_MAX_UNITS || type >= NUM_DISK_MINORS) |
2024 | return; |
2025 | if (unit[drive].disk[type]) |
2026 | return; |
2027 | if (ataflop_alloc_disk(drive, type)) |
2028 | return; |
2029 | if (add_disk(disk: unit[drive].disk[type])) |
2030 | goto cleanup_disk; |
2031 | unit[drive].registered[type] = true; |
2032 | return; |
2033 | |
2034 | cleanup_disk: |
2035 | put_disk(disk: unit[drive].disk[type]); |
2036 | unit[drive].disk[type] = NULL; |
2037 | } |
2038 | |
2039 | static void atari_floppy_cleanup(void) |
2040 | { |
2041 | int i; |
2042 | int type; |
2043 | |
2044 | for (i = 0; i < FD_MAX_UNITS; i++) { |
2045 | for (type = 0; type < NUM_DISK_MINORS; type++) { |
2046 | if (!unit[i].disk[type]) |
2047 | continue; |
2048 | del_gendisk(gp: unit[i].disk[type]); |
2049 | put_disk(disk: unit[i].disk[type]); |
2050 | } |
2051 | blk_mq_free_tag_set(set: &unit[i].tag_set); |
2052 | } |
2053 | |
2054 | del_timer_sync(timer: &fd_timer); |
2055 | atari_stram_free(DMABuffer); |
2056 | } |
2057 | |
2058 | static void atari_cleanup_floppy_disk(struct atari_floppy_struct *fs) |
2059 | { |
2060 | int type; |
2061 | |
2062 | for (type = 0; type < NUM_DISK_MINORS; type++) { |
2063 | if (!fs->disk[type]) |
2064 | continue; |
2065 | if (fs->registered[type]) |
2066 | del_gendisk(gp: fs->disk[type]); |
2067 | put_disk(disk: fs->disk[type]); |
2068 | } |
2069 | blk_mq_free_tag_set(set: &fs->tag_set); |
2070 | } |
2071 | |
2072 | static int __init atari_floppy_init (void) |
2073 | { |
2074 | int i; |
2075 | int ret; |
2076 | |
2077 | if (!MACH_IS_ATARI) |
2078 | /* Amiga, Mac, ... don't have Atari-compatible floppy :-) */ |
2079 | return -ENODEV; |
2080 | |
2081 | for (i = 0; i < FD_MAX_UNITS; i++) { |
2082 | memset(&unit[i].tag_set, 0, sizeof(unit[i].tag_set)); |
2083 | unit[i].tag_set.ops = &ataflop_mq_ops; |
2084 | unit[i].tag_set.nr_hw_queues = 1; |
2085 | unit[i].tag_set.nr_maps = 1; |
2086 | unit[i].tag_set.queue_depth = 2; |
2087 | unit[i].tag_set.numa_node = NUMA_NO_NODE; |
2088 | unit[i].tag_set.flags = BLK_MQ_F_SHOULD_MERGE; |
2089 | ret = blk_mq_alloc_tag_set(set: &unit[i].tag_set); |
2090 | if (ret) |
2091 | goto err; |
2092 | |
2093 | ret = ataflop_alloc_disk(drive: i, type: 0); |
2094 | if (ret) { |
2095 | blk_mq_free_tag_set(set: &unit[i].tag_set); |
2096 | goto err; |
2097 | } |
2098 | } |
2099 | |
2100 | if (UseTrackbuffer < 0) |
2101 | /* not set by user -> use default: for now, we turn |
2102 | track buffering off for all Medusas, though it |
2103 | could be used with ones that have a counter |
2104 | card. But the test is too hard :-( */ |
2105 | UseTrackbuffer = !MACH_IS_MEDUSA; |
2106 | |
2107 | /* initialize variables */ |
2108 | SelectedDrive = -1; |
2109 | BufferDrive = -1; |
2110 | |
2111 | DMABuffer = atari_stram_alloc(BUFFER_SIZE+512, "ataflop" ); |
2112 | if (!DMABuffer) { |
2113 | printk(KERN_ERR "atari_floppy_init: cannot get dma buffer\n" ); |
2114 | ret = -ENOMEM; |
2115 | goto err; |
2116 | } |
2117 | TrackBuffer = DMABuffer + 512; |
2118 | PhysDMABuffer = atari_stram_to_phys(DMABuffer); |
2119 | PhysTrackBuffer = virt_to_phys(address: TrackBuffer); |
2120 | BufferDrive = BufferSide = BufferTrack = -1; |
2121 | |
2122 | for (i = 0; i < FD_MAX_UNITS; i++) { |
2123 | unit[i].track = -1; |
2124 | unit[i].flags = 0; |
2125 | ret = add_disk(disk: unit[i].disk[0]); |
2126 | if (ret) |
2127 | goto err_out_dma; |
2128 | unit[i].registered[0] = true; |
2129 | } |
2130 | |
2131 | printk(KERN_INFO "Atari floppy driver: max. %cD, %strack buffering\n" , |
2132 | DriveType == 0 ? 'D' : DriveType == 1 ? 'H' : 'E', |
2133 | UseTrackbuffer ? "" : "no " ); |
2134 | config_types(); |
2135 | |
2136 | ret = __register_blkdev(FLOPPY_MAJOR, name: "fd" , probe: ataflop_probe); |
2137 | if (ret) { |
2138 | printk(KERN_ERR "atari_floppy_init: cannot register block device\n" ); |
2139 | atari_floppy_cleanup(); |
2140 | } |
2141 | return ret; |
2142 | |
2143 | err_out_dma: |
2144 | atari_stram_free(DMABuffer); |
2145 | err: |
2146 | while (--i >= 0) |
2147 | atari_cleanup_floppy_disk(fs: &unit[i]); |
2148 | |
2149 | return ret; |
2150 | } |
2151 | |
2152 | #ifndef MODULE |
2153 | static int __init atari_floppy_setup(char *str) |
2154 | { |
2155 | int ints[3 + FD_MAX_UNITS]; |
2156 | int i; |
2157 | |
2158 | if (!MACH_IS_ATARI) |
2159 | return 0; |
2160 | |
2161 | str = get_options(str, nints: 3 + FD_MAX_UNITS, ints); |
2162 | |
2163 | if (ints[0] < 1) { |
2164 | printk(KERN_ERR "ataflop_setup: no arguments!\n" ); |
2165 | return 0; |
2166 | } |
2167 | else if (ints[0] > 2+FD_MAX_UNITS) { |
2168 | printk(KERN_ERR "ataflop_setup: too many arguments\n" ); |
2169 | } |
2170 | |
2171 | if (ints[1] < 0 || ints[1] > 2) |
2172 | printk(KERN_ERR "ataflop_setup: bad drive type\n" ); |
2173 | else |
2174 | DriveType = ints[1]; |
2175 | |
2176 | if (ints[0] >= 2) |
2177 | UseTrackbuffer = (ints[2] > 0); |
2178 | |
2179 | for( i = 3; i <= ints[0] && i-3 < FD_MAX_UNITS; ++i ) { |
2180 | if (ints[i] != 2 && ints[i] != 3 && ints[i] != 6 && ints[i] != 12) |
2181 | printk(KERN_ERR "ataflop_setup: bad steprate\n" ); |
2182 | else |
2183 | UserSteprate[i-3] = ints[i]; |
2184 | } |
2185 | return 1; |
2186 | } |
2187 | |
2188 | __setup("floppy=" , atari_floppy_setup); |
2189 | #endif |
2190 | |
2191 | static void __exit atari_floppy_exit(void) |
2192 | { |
2193 | unregister_blkdev(FLOPPY_MAJOR, name: "fd" ); |
2194 | atari_floppy_cleanup(); |
2195 | } |
2196 | |
2197 | module_init(atari_floppy_init) |
2198 | module_exit(atari_floppy_exit) |
2199 | |
2200 | MODULE_LICENSE("GPL" ); |
2201 | |