Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * drivers/block/ataflop.c | |
3 | * | |
4 | * Copyright (C) 1993 Greg Harp | |
5 | * Atari Support by Bjoern Brauel, Roman Hodek | |
6 | * | |
7 | * Big cleanup Sep 11..14 1994 Roman Hodek: | |
8 | * - Driver now works interrupt driven | |
9 | * - Support for two drives; should work, but I cannot test that :-( | |
10 | * - Reading is done in whole tracks and buffered to speed up things | |
11 | * - Disk change detection and drive deselecting after motor-off | |
12 | * similar to TOS | |
13 | * - Autodetection of disk format (DD/HD); untested yet, because I | |
14 | * don't have an HD drive :-( | |
15 | * | |
16 | * Fixes Nov 13 1994 Martin Schaller: | |
17 | * - Autodetection works now | |
18 | * - Support for 5 1/4'' disks | |
19 | * - Removed drive type (unknown on atari) | |
20 | * - Do seeks with 8 Mhz | |
21 | * | |
22 | * Changes by Andreas Schwab: | |
23 | * - After errors in multiple read mode try again reading single sectors | |
24 | * (Feb 1995): | |
25 | * - Clean up error handling | |
26 | * - Set blk_size for proper size checking | |
27 | * - Initialize track register when testing presence of floppy | |
28 | * - Implement some ioctl's | |
29 | * | |
30 | * Changes by Torsten Lang: | |
31 | * - When probing the floppies we should add the FDCCMDADD_H flag since | |
32 | * the FDC will otherwise wait forever when no disk is inserted... | |
33 | * | |
34 | * ++ Freddi Aschwanden (fa) 20.9.95 fixes for medusa: | |
35 | * - MFPDELAY() after each FDC access -> atari | |
36 | * - more/other disk formats | |
37 | * - DMA to the block buffer directly if we have a 32bit DMA | |
38 | * - for medusa, the step rate is always 3ms | |
39 | * - on medusa, use only cache_push() | |
40 | * Roman: | |
41 | * - Make disk format numbering independent from minors | |
42 | * - Let user set max. supported drive type (speeds up format | |
43 | * detection, saves buffer space) | |
44 | * | |
45 | * Roman 10/15/95: | |
46 | * - implement some more ioctls | |
47 | * - disk formatting | |
48 | * | |
49 | * Andreas 95/12/12: | |
50 | * - increase gap size at start of track for HD/ED disks | |
51 | * | |
52 | * Michael (MSch) 11/07/96: | |
53 | * - implemented FDSETPRM and FDDEFPRM ioctl | |
54 | * | |
55 | * Andreas (97/03/19): | |
56 | * - implemented missing BLK* ioctls | |
57 | * | |
58 | * Things left to do: | |
59 | * - Formatting | |
60 | * - Maybe a better strategy for disk change detection (does anyone | |
61 | * know one?) | |
62 | */ | |
63 | ||
64 | #include <linux/module.h> | |
65 | ||
66 | #include <linux/fd.h> | |
67 | #include <linux/delay.h> | |
68 | #include <linux/init.h> | |
69 | #include <linux/blkdev.h> | |
70 | ||
71 | #include <asm/atafd.h> | |
72 | #include <asm/atafdreg.h> | |
73 | #include <asm/atariints.h> | |
74 | #include <asm/atari_stdma.h> | |
75 | #include <asm/atari_stram.h> | |
76 | ||
77 | #define FD_MAX_UNITS 2 | |
78 | ||
79 | #undef DEBUG | |
80 | ||
81 | static struct request_queue *floppy_queue; | |
82 | ||
83 | #define QUEUE (floppy_queue) | |
84 | #define CURRENT elv_next_request(floppy_queue) | |
85 | ||
86 | /* Disk types: DD, HD, ED */ | |
87 | static struct atari_disk_type { | |
88 | const char *name; | |
89 | unsigned spt; /* sectors per track */ | |
90 | unsigned blocks; /* total number of blocks */ | |
91 | unsigned fdc_speed; /* fdc_speed setting */ | |
92 | unsigned stretch; /* track doubling ? */ | |
93 | } disk_type[] = { | |
94 | { "d360", 9, 720, 0, 0}, /* 0: 360kB diskette */ | |
95 | { "D360", 9, 720, 0, 1}, /* 1: 360kb in 720k or 1.2MB drive */ | |
96 | { "D720", 9,1440, 0, 0}, /* 2: 720kb in 720k or 1.2MB drive */ | |
97 | { "D820", 10,1640, 0, 0}, /* 3: DD disk with 82 tracks/10 sectors */ | |
98 | /* formats above are probed for type DD */ | |
99 | #define MAX_TYPE_DD 3 | |
100 | { "h1200",15,2400, 3, 0}, /* 4: 1.2MB diskette */ | |
101 | { "H1440",18,2880, 3, 0}, /* 5: 1.4 MB diskette (HD) */ | |
102 | { "H1640",20,3280, 3, 0}, /* 6: 1.64MB diskette (fat HD) 82 tr 20 sec */ | |
103 | /* formats above are probed for types DD and HD */ | |
104 | #define MAX_TYPE_HD 6 | |
105 | { "E2880",36,5760, 3, 0}, /* 7: 2.8 MB diskette (ED) */ | |
106 | { "E3280",40,6560, 3, 0}, /* 8: 3.2 MB diskette (fat ED) 82 tr 40 sec */ | |
107 | /* formats above are probed for types DD, HD and ED */ | |
108 | #define MAX_TYPE_ED 8 | |
109 | /* types below are never autoprobed */ | |
110 | { "H1680",21,3360, 3, 0}, /* 9: 1.68MB diskette (fat HD) 80 tr 21 sec */ | |
111 | { "h410",10,820, 0, 1}, /* 10: 410k diskette 41 tr 10 sec, stretch */ | |
112 | { "h1476",18,2952, 3, 0}, /* 11: 1.48MB diskette 82 tr 18 sec */ | |
113 | { "H1722",21,3444, 3, 0}, /* 12: 1.72MB diskette 82 tr 21 sec */ | |
114 | { "h420",10,840, 0, 1}, /* 13: 420k diskette 42 tr 10 sec, stretch */ | |
115 | { "H830",10,1660, 0, 0}, /* 14: 820k diskette 83 tr 10 sec */ | |
116 | { "h1494",18,2952, 3, 0}, /* 15: 1.49MB diskette 83 tr 18 sec */ | |
117 | { "H1743",21,3486, 3, 0}, /* 16: 1.74MB diskette 83 tr 21 sec */ | |
118 | { "h880",11,1760, 0, 0}, /* 17: 880k diskette 80 tr 11 sec */ | |
119 | { "D1040",13,2080, 0, 0}, /* 18: 1.04MB diskette 80 tr 13 sec */ | |
120 | { "D1120",14,2240, 0, 0}, /* 19: 1.12MB diskette 80 tr 14 sec */ | |
121 | { "h1600",20,3200, 3, 0}, /* 20: 1.60MB diskette 80 tr 20 sec */ | |
122 | { "H1760",22,3520, 3, 0}, /* 21: 1.76MB diskette 80 tr 22 sec */ | |
123 | { "H1920",24,3840, 3, 0}, /* 22: 1.92MB diskette 80 tr 24 sec */ | |
124 | { "E3200",40,6400, 3, 0}, /* 23: 3.2MB diskette 80 tr 40 sec */ | |
125 | { "E3520",44,7040, 3, 0}, /* 24: 3.52MB diskette 80 tr 44 sec */ | |
126 | { "E3840",48,7680, 3, 0}, /* 25: 3.84MB diskette 80 tr 48 sec */ | |
127 | { "H1840",23,3680, 3, 0}, /* 26: 1.84MB diskette 80 tr 23 sec */ | |
128 | { "D800",10,1600, 0, 0}, /* 27: 800k diskette 80 tr 10 sec */ | |
129 | }; | |
130 | ||
131 | static int StartDiskType[] = { | |
132 | MAX_TYPE_DD, | |
133 | MAX_TYPE_HD, | |
134 | MAX_TYPE_ED | |
135 | }; | |
136 | ||
137 | #define TYPE_DD 0 | |
138 | #define TYPE_HD 1 | |
139 | #define TYPE_ED 2 | |
140 | ||
141 | static int DriveType = TYPE_HD; | |
142 | ||
143 | static DEFINE_SPINLOCK(ataflop_lock); | |
144 | ||
145 | /* Array for translating minors into disk formats */ | |
146 | static struct { | |
147 | int index; | |
148 | unsigned drive_types; | |
149 | } minor2disktype[] = { | |
150 | { 0, TYPE_DD }, /* 1: d360 */ | |
151 | { 4, TYPE_HD }, /* 2: h1200 */ | |
152 | { 1, TYPE_DD }, /* 3: D360 */ | |
153 | { 2, TYPE_DD }, /* 4: D720 */ | |
154 | { 1, TYPE_DD }, /* 5: h360 = D360 */ | |
155 | { 2, TYPE_DD }, /* 6: h720 = D720 */ | |
156 | { 5, TYPE_HD }, /* 7: H1440 */ | |
157 | { 7, TYPE_ED }, /* 8: E2880 */ | |
158 | /* some PC formats :-) */ | |
159 | { 8, TYPE_ED }, /* 9: E3280 <- was "CompaQ" == E2880 for PC */ | |
160 | { 5, TYPE_HD }, /* 10: h1440 = H1440 */ | |
161 | { 9, TYPE_HD }, /* 11: H1680 */ | |
162 | { 10, TYPE_DD }, /* 12: h410 */ | |
163 | { 3, TYPE_DD }, /* 13: H820 <- == D820, 82x10 */ | |
164 | { 11, TYPE_HD }, /* 14: h1476 */ | |
165 | { 12, TYPE_HD }, /* 15: H1722 */ | |
166 | { 13, TYPE_DD }, /* 16: h420 */ | |
167 | { 14, TYPE_DD }, /* 17: H830 */ | |
168 | { 15, TYPE_HD }, /* 18: h1494 */ | |
169 | { 16, TYPE_HD }, /* 19: H1743 */ | |
170 | { 17, TYPE_DD }, /* 20: h880 */ | |
171 | { 18, TYPE_DD }, /* 21: D1040 */ | |
172 | { 19, TYPE_DD }, /* 22: D1120 */ | |
173 | { 20, TYPE_HD }, /* 23: h1600 */ | |
174 | { 21, TYPE_HD }, /* 24: H1760 */ | |
175 | { 22, TYPE_HD }, /* 25: H1920 */ | |
176 | { 23, TYPE_ED }, /* 26: E3200 */ | |
177 | { 24, TYPE_ED }, /* 27: E3520 */ | |
178 | { 25, TYPE_ED }, /* 28: E3840 */ | |
179 | { 26, TYPE_HD }, /* 29: H1840 */ | |
180 | { 27, TYPE_DD }, /* 30: D800 */ | |
181 | { 6, TYPE_HD }, /* 31: H1640 <- was H1600 == h1600 for PC */ | |
182 | }; | |
183 | ||
184 | #define NUM_DISK_MINORS (sizeof(minor2disktype)/sizeof(*minor2disktype)) | |
185 | ||
186 | /* | |
187 | * Maximum disk size (in kilobytes). This default is used whenever the | |
188 | * current disk size is unknown. | |
189 | */ | |
190 | #define MAX_DISK_SIZE 3280 | |
191 | ||
192 | /* | |
193 | * MSch: User-provided type information. 'drive' points to | |
194 | * the respective entry of this array. Set by FDSETPRM ioctls. | |
195 | */ | |
196 | static struct atari_disk_type user_params[FD_MAX_UNITS]; | |
197 | ||
198 | /* | |
199 | * User-provided permanent type information. 'drive' points to | |
200 | * the respective entry of this array. Set by FDDEFPRM ioctls, | |
201 | * restored upon disk change by floppy_revalidate() if valid (as seen by | |
202 | * default_params[].blocks > 0 - a bit in unit[].flags might be used for this?) | |
203 | */ | |
204 | static struct atari_disk_type default_params[FD_MAX_UNITS]; | |
205 | ||
206 | /* current info on each unit */ | |
207 | static struct atari_floppy_struct { | |
208 | int connected; /* !=0 : drive is connected */ | |
209 | int autoprobe; /* !=0 : do autoprobe */ | |
210 | ||
211 | struct atari_disk_type *disktype; /* current type of disk */ | |
212 | ||
213 | int track; /* current head position or -1 if | |
214 | unknown */ | |
215 | unsigned int steprate; /* steprate setting */ | |
216 | unsigned int wpstat; /* current state of WP signal (for | |
217 | disk change detection) */ | |
218 | int flags; /* flags */ | |
219 | struct gendisk *disk; | |
220 | int ref; | |
221 | int type; | |
222 | } unit[FD_MAX_UNITS]; | |
223 | ||
224 | #define UD unit[drive] | |
225 | #define UDT unit[drive].disktype | |
226 | #define SUD unit[SelectedDrive] | |
227 | #define SUDT unit[SelectedDrive].disktype | |
228 | ||
229 | ||
230 | #define FDC_READ(reg) ({ \ | |
231 | /* unsigned long __flags; */ \ | |
232 | unsigned short __val; \ | |
233 | /* local_irq_save(__flags); */ \ | |
234 | dma_wd.dma_mode_status = 0x80 | (reg); \ | |
235 | udelay(25); \ | |
236 | __val = dma_wd.fdc_acces_seccount; \ | |
237 | MFPDELAY(); \ | |
238 | /* local_irq_restore(__flags); */ \ | |
239 | __val & 0xff; \ | |
240 | }) | |
241 | ||
242 | #define FDC_WRITE(reg,val) \ | |
243 | do { \ | |
244 | /* unsigned long __flags; */ \ | |
245 | /* local_irq_save(__flags); */ \ | |
246 | dma_wd.dma_mode_status = 0x80 | (reg); \ | |
247 | udelay(25); \ | |
248 | dma_wd.fdc_acces_seccount = (val); \ | |
249 | MFPDELAY(); \ | |
250 | /* local_irq_restore(__flags); */ \ | |
251 | } while(0) | |
252 | ||
253 | ||
254 | /* Buffering variables: | |
255 | * First, there is a DMA buffer in ST-RAM that is used for floppy DMA | |
256 | * operations. Second, a track buffer is used to cache a whole track | |
257 | * of the disk to save read operations. These are two separate buffers | |
258 | * because that allows write operations without clearing the track buffer. | |
259 | */ | |
260 | ||
261 | static int MaxSectors[] = { | |
262 | 11, 22, 44 | |
263 | }; | |
264 | static int BufferSize[] = { | |
265 | 15*512, 30*512, 60*512 | |
266 | }; | |
267 | ||
268 | #define BUFFER_SIZE (BufferSize[DriveType]) | |
269 | ||
270 | unsigned char *DMABuffer; /* buffer for writes */ | |
271 | static unsigned long PhysDMABuffer; /* physical address */ | |
272 | ||
273 | static int UseTrackbuffer = -1; /* Do track buffering? */ | |
274 | MODULE_PARM(UseTrackbuffer, "i"); | |
275 | ||
276 | unsigned char *TrackBuffer; /* buffer for reads */ | |
277 | static unsigned long PhysTrackBuffer; /* physical address */ | |
278 | static int BufferDrive, BufferSide, BufferTrack; | |
279 | static int read_track; /* non-zero if we are reading whole tracks */ | |
280 | ||
281 | #define SECTOR_BUFFER(sec) (TrackBuffer + ((sec)-1)*512) | |
282 | #define IS_BUFFERED(drive,side,track) \ | |
283 | (BufferDrive == (drive) && BufferSide == (side) && BufferTrack == (track)) | |
284 | ||
285 | /* | |
286 | * These are global variables, as that's the easiest way to give | |
287 | * information to interrupts. They are the data used for the current | |
288 | * request. | |
289 | */ | |
290 | static int SelectedDrive = 0; | |
291 | static int ReqCmd, ReqBlock; | |
292 | static int ReqSide, ReqTrack, ReqSector, ReqCnt; | |
293 | static int HeadSettleFlag = 0; | |
294 | static unsigned char *ReqData, *ReqBuffer; | |
295 | static int MotorOn = 0, MotorOffTrys; | |
296 | static int IsFormatting = 0, FormatError; | |
297 | ||
298 | static int UserSteprate[FD_MAX_UNITS] = { -1, -1 }; | |
299 | MODULE_PARM(UserSteprate, "1-" __MODULE_STRING(FD_MAX_UNITS) "i"); | |
300 | ||
301 | /* Synchronization of FDC access. */ | |
302 | static volatile int fdc_busy = 0; | |
303 | static DECLARE_WAIT_QUEUE_HEAD(fdc_wait); | |
304 | static DECLARE_WAIT_QUEUE_HEAD(format_wait); | |
305 | ||
306 | static unsigned long changed_floppies = 0xff, fake_change = 0; | |
307 | #define CHECK_CHANGE_DELAY HZ/2 | |
308 | ||
309 | #define FD_MOTOR_OFF_DELAY (3*HZ) | |
310 | #define FD_MOTOR_OFF_MAXTRY (10*20) | |
311 | ||
312 | #define FLOPPY_TIMEOUT (6*HZ) | |
313 | #define RECALIBRATE_ERRORS 4 /* After this many errors the drive | |
314 | * will be recalibrated. */ | |
315 | #define MAX_ERRORS 8 /* After this many errors the driver | |
316 | * will give up. */ | |
317 | ||
318 | ||
319 | /* | |
320 | * The driver is trying to determine the correct media format | |
321 | * while Probing is set. fd_rwsec_done() clears it after a | |
322 | * successful access. | |
323 | */ | |
324 | static int Probing = 0; | |
325 | ||
326 | /* This flag is set when a dummy seek is necessary to make the WP | |
327 | * status bit accessible. | |
328 | */ | |
329 | static int NeedSeek = 0; | |
330 | ||
331 | ||
332 | #ifdef DEBUG | |
333 | #define DPRINT(a) printk a | |
334 | #else | |
335 | #define DPRINT(a) | |
336 | #endif | |
337 | ||
338 | /***************************** Prototypes *****************************/ | |
339 | ||
340 | static void fd_select_side( int side ); | |
341 | static void fd_select_drive( int drive ); | |
342 | static void fd_deselect( void ); | |
343 | static void fd_motor_off_timer( unsigned long dummy ); | |
344 | static void check_change( unsigned long dummy ); | |
345 | static irqreturn_t floppy_irq (int irq, void *dummy, struct pt_regs *fp); | |
346 | static void fd_error( void ); | |
347 | static int do_format(int drive, int type, struct atari_format_descr *desc); | |
348 | static void do_fd_action( int drive ); | |
349 | static void fd_calibrate( void ); | |
350 | static void fd_calibrate_done( int status ); | |
351 | static void fd_seek( void ); | |
352 | static void fd_seek_done( int status ); | |
353 | static void fd_rwsec( void ); | |
354 | static void fd_readtrack_check( unsigned long dummy ); | |
355 | static void fd_rwsec_done( int status ); | |
356 | static void fd_rwsec_done1(int status); | |
357 | static void fd_writetrack( void ); | |
358 | static void fd_writetrack_done( int status ); | |
359 | static void fd_times_out( unsigned long dummy ); | |
360 | static void finish_fdc( void ); | |
361 | static void finish_fdc_done( int dummy ); | |
362 | static void setup_req_params( int drive ); | |
363 | static void redo_fd_request( void); | |
364 | static int fd_ioctl( struct inode *inode, struct file *filp, unsigned int | |
365 | cmd, unsigned long param); | |
366 | static void fd_probe( int drive ); | |
367 | static int fd_test_drive_present( int drive ); | |
368 | static void config_types( void ); | |
369 | static int floppy_open( struct inode *inode, struct file *filp ); | |
370 | static int floppy_release( struct inode * inode, struct file * filp ); | |
371 | ||
372 | /************************* End of Prototypes **************************/ | |
373 | ||
8d06afab IM |
374 | static DEFINE_TIMER(motor_off_timer, fd_motor_off_timer, 0, 0); |
375 | static DEFINE_TIMER(readtrack_timer, fd_readtrack_check, 0, 0); | |
376 | static DEFINE_TIMER(timeout_timer, fd_times_out, 0, 0); | |
377 | static DEFINE_TIMER(fd_timer, check_change, 0, 0); | |
1da177e4 LT |
378 | |
379 | static inline void start_motor_off_timer(void) | |
380 | { | |
381 | mod_timer(&motor_off_timer, jiffies + FD_MOTOR_OFF_DELAY); | |
382 | MotorOffTrys = 0; | |
383 | } | |
384 | ||
385 | static inline void start_check_change_timer( void ) | |
386 | { | |
387 | mod_timer(&fd_timer, jiffies + CHECK_CHANGE_DELAY); | |
388 | } | |
389 | ||
390 | static inline void start_timeout(void) | |
391 | { | |
392 | mod_timer(&timeout_timer, jiffies + FLOPPY_TIMEOUT); | |
393 | } | |
394 | ||
395 | static inline void stop_timeout(void) | |
396 | { | |
397 | del_timer(&timeout_timer); | |
398 | } | |
399 | ||
400 | /* Select the side to use. */ | |
401 | ||
402 | static void fd_select_side( int side ) | |
403 | { | |
404 | unsigned long flags; | |
405 | ||
406 | /* protect against various other ints mucking around with the PSG */ | |
407 | local_irq_save(flags); | |
408 | ||
409 | sound_ym.rd_data_reg_sel = 14; /* Select PSG Port A */ | |
410 | sound_ym.wd_data = (side == 0) ? sound_ym.rd_data_reg_sel | 0x01 : | |
411 | sound_ym.rd_data_reg_sel & 0xfe; | |
412 | ||
413 | local_irq_restore(flags); | |
414 | } | |
415 | ||
416 | ||
417 | /* Select a drive, update the FDC's track register and set the correct | |
418 | * clock speed for this disk's type. | |
419 | */ | |
420 | ||
421 | static void fd_select_drive( int drive ) | |
422 | { | |
423 | unsigned long flags; | |
424 | unsigned char tmp; | |
425 | ||
426 | if (drive == SelectedDrive) | |
427 | return; | |
428 | ||
429 | /* protect against various other ints mucking around with the PSG */ | |
430 | local_irq_save(flags); | |
431 | sound_ym.rd_data_reg_sel = 14; /* Select PSG Port A */ | |
432 | tmp = sound_ym.rd_data_reg_sel; | |
433 | sound_ym.wd_data = (tmp | DSKDRVNONE) & ~(drive == 0 ? DSKDRV0 : DSKDRV1); | |
434 | atari_dont_touch_floppy_select = 1; | |
435 | local_irq_restore(flags); | |
436 | ||
437 | /* restore track register to saved value */ | |
438 | FDC_WRITE( FDCREG_TRACK, UD.track ); | |
439 | udelay(25); | |
440 | ||
441 | /* select 8/16 MHz */ | |
442 | if (UDT) | |
443 | if (ATARIHW_PRESENT(FDCSPEED)) | |
444 | dma_wd.fdc_speed = UDT->fdc_speed; | |
445 | ||
446 | SelectedDrive = drive; | |
447 | } | |
448 | ||
449 | ||
450 | /* Deselect both drives. */ | |
451 | ||
452 | static void fd_deselect( void ) | |
453 | { | |
454 | unsigned long flags; | |
455 | ||
456 | /* protect against various other ints mucking around with the PSG */ | |
457 | local_irq_save(flags); | |
458 | atari_dont_touch_floppy_select = 0; | |
459 | sound_ym.rd_data_reg_sel=14; /* Select PSG Port A */ | |
460 | sound_ym.wd_data = (sound_ym.rd_data_reg_sel | | |
461 | (MACH_IS_FALCON ? 3 : 7)); /* no drives selected */ | |
462 | /* On Falcon, the drive B select line is used on the printer port, so | |
463 | * leave it alone... */ | |
464 | SelectedDrive = -1; | |
465 | local_irq_restore(flags); | |
466 | } | |
467 | ||
468 | ||
469 | /* This timer function deselects the drives when the FDC switched the | |
470 | * motor off. The deselection cannot happen earlier because the FDC | |
471 | * counts the index signals, which arrive only if one drive is selected. | |
472 | */ | |
473 | ||
474 | static void fd_motor_off_timer( unsigned long dummy ) | |
475 | { | |
476 | unsigned char status; | |
477 | ||
478 | if (SelectedDrive < 0) | |
479 | /* no drive selected, needn't deselect anyone */ | |
480 | return; | |
481 | ||
482 | if (stdma_islocked()) | |
483 | goto retry; | |
484 | ||
485 | status = FDC_READ( FDCREG_STATUS ); | |
486 | ||
487 | if (!(status & 0x80)) { | |
488 | /* motor already turned off by FDC -> deselect drives */ | |
489 | MotorOn = 0; | |
490 | fd_deselect(); | |
491 | return; | |
492 | } | |
493 | /* not yet off, try again */ | |
494 | ||
495 | retry: | |
496 | /* Test again later; if tested too often, it seems there is no disk | |
497 | * in the drive and the FDC will leave the motor on forever (or, | |
498 | * at least until a disk is inserted). So we'll test only twice | |
499 | * per second from then on... | |
500 | */ | |
501 | mod_timer(&motor_off_timer, | |
502 | jiffies + (MotorOffTrys++ < FD_MOTOR_OFF_MAXTRY ? HZ/20 : HZ/2)); | |
503 | } | |
504 | ||
505 | ||
506 | /* This function is repeatedly called to detect disk changes (as good | |
507 | * as possible) and keep track of the current state of the write protection. | |
508 | */ | |
509 | ||
510 | static void check_change( unsigned long dummy ) | |
511 | { | |
512 | static int drive = 0; | |
513 | ||
514 | unsigned long flags; | |
515 | unsigned char old_porta; | |
516 | int stat; | |
517 | ||
518 | if (++drive > 1 || !UD.connected) | |
519 | drive = 0; | |
520 | ||
521 | /* protect against various other ints mucking around with the PSG */ | |
522 | local_irq_save(flags); | |
523 | ||
524 | if (!stdma_islocked()) { | |
525 | sound_ym.rd_data_reg_sel = 14; | |
526 | old_porta = sound_ym.rd_data_reg_sel; | |
527 | sound_ym.wd_data = (old_porta | DSKDRVNONE) & | |
528 | ~(drive == 0 ? DSKDRV0 : DSKDRV1); | |
529 | stat = !!(FDC_READ( FDCREG_STATUS ) & FDCSTAT_WPROT); | |
530 | sound_ym.wd_data = old_porta; | |
531 | ||
532 | if (stat != UD.wpstat) { | |
533 | DPRINT(( "wpstat[%d] = %d\n", drive, stat )); | |
534 | UD.wpstat = stat; | |
535 | set_bit (drive, &changed_floppies); | |
536 | } | |
537 | } | |
538 | local_irq_restore(flags); | |
539 | ||
540 | start_check_change_timer(); | |
541 | } | |
542 | ||
543 | ||
544 | /* Handling of the Head Settling Flag: This flag should be set after each | |
545 | * seek operation, because we don't use seeks with verify. | |
546 | */ | |
547 | ||
548 | static inline void set_head_settle_flag(void) | |
549 | { | |
550 | HeadSettleFlag = FDCCMDADD_E; | |
551 | } | |
552 | ||
553 | static inline int get_head_settle_flag(void) | |
554 | { | |
555 | int tmp = HeadSettleFlag; | |
556 | HeadSettleFlag = 0; | |
557 | return( tmp ); | |
558 | } | |
559 | ||
560 | static inline void copy_buffer(void *from, void *to) | |
561 | { | |
562 | ulong *p1 = (ulong *)from, *p2 = (ulong *)to; | |
563 | int cnt; | |
564 | ||
565 | for (cnt = 512/4; cnt; cnt--) | |
566 | *p2++ = *p1++; | |
567 | } | |
568 | ||
569 | ||
570 | ||
571 | ||
572 | /* General Interrupt Handling */ | |
573 | ||
574 | static void (*FloppyIRQHandler)( int status ) = NULL; | |
575 | ||
576 | static irqreturn_t floppy_irq (int irq, void *dummy, struct pt_regs *fp) | |
577 | { | |
578 | unsigned char status; | |
579 | void (*handler)( int ); | |
580 | ||
581 | handler = xchg(&FloppyIRQHandler, NULL); | |
582 | ||
583 | if (handler) { | |
584 | nop(); | |
585 | status = FDC_READ( FDCREG_STATUS ); | |
586 | DPRINT(("FDC irq, status = %02x handler = %08lx\n",status,(unsigned long)handler)); | |
587 | handler( status ); | |
588 | } | |
589 | else { | |
590 | DPRINT(("FDC irq, no handler\n")); | |
591 | } | |
592 | return IRQ_HANDLED; | |
593 | } | |
594 | ||
595 | ||
596 | /* Error handling: If some error happened, retry some times, then | |
597 | * recalibrate, then try again, and fail after MAX_ERRORS. | |
598 | */ | |
599 | ||
600 | static void fd_error( void ) | |
601 | { | |
602 | if (IsFormatting) { | |
603 | IsFormatting = 0; | |
604 | FormatError = 1; | |
605 | wake_up( &format_wait ); | |
606 | return; | |
607 | } | |
608 | ||
609 | if (!CURRENT) | |
610 | return; | |
611 | ||
612 | CURRENT->errors++; | |
613 | if (CURRENT->errors >= MAX_ERRORS) { | |
614 | printk(KERN_ERR "fd%d: too many errors.\n", SelectedDrive ); | |
615 | end_request(CURRENT, 0); | |
616 | } | |
617 | else if (CURRENT->errors == RECALIBRATE_ERRORS) { | |
618 | printk(KERN_WARNING "fd%d: recalibrating\n", SelectedDrive ); | |
619 | if (SelectedDrive != -1) | |
620 | SUD.track = -1; | |
621 | } | |
622 | redo_fd_request(); | |
623 | } | |
624 | ||
625 | ||
626 | ||
627 | #define SET_IRQ_HANDLER(proc) do { FloppyIRQHandler = (proc); } while(0) | |
628 | ||
629 | ||
630 | /* ---------- Formatting ---------- */ | |
631 | ||
632 | #define FILL(n,val) \ | |
633 | do { \ | |
634 | memset( p, val, n ); \ | |
635 | p += n; \ | |
636 | } while(0) | |
637 | ||
638 | static int do_format(int drive, int type, struct atari_format_descr *desc) | |
639 | { | |
640 | unsigned char *p; | |
641 | int sect, nsect; | |
642 | unsigned long flags; | |
643 | ||
644 | DPRINT(("do_format( dr=%d tr=%d he=%d offs=%d )\n", | |
645 | drive, desc->track, desc->head, desc->sect_offset )); | |
646 | ||
647 | local_irq_save(flags); | |
648 | while( fdc_busy ) sleep_on( &fdc_wait ); | |
649 | fdc_busy = 1; | |
650 | stdma_lock(floppy_irq, NULL); | |
651 | atari_turnon_irq( IRQ_MFP_FDC ); /* should be already, just to be sure */ | |
652 | local_irq_restore(flags); | |
653 | ||
654 | if (type) { | |
655 | if (--type >= NUM_DISK_MINORS || | |
656 | minor2disktype[type].drive_types > DriveType) { | |
657 | redo_fd_request(); | |
658 | return -EINVAL; | |
659 | } | |
660 | type = minor2disktype[type].index; | |
661 | UDT = &disk_type[type]; | |
662 | } | |
663 | ||
664 | if (!UDT || desc->track >= UDT->blocks/UDT->spt/2 || desc->head >= 2) { | |
665 | redo_fd_request(); | |
666 | return -EINVAL; | |
667 | } | |
668 | ||
669 | nsect = UDT->spt; | |
670 | p = TrackBuffer; | |
671 | /* The track buffer is used for the raw track data, so its | |
672 | contents become invalid! */ | |
673 | BufferDrive = -1; | |
674 | /* stop deselect timer */ | |
675 | del_timer( &motor_off_timer ); | |
676 | ||
677 | FILL( 60 * (nsect / 9), 0x4e ); | |
678 | for( sect = 0; sect < nsect; ++sect ) { | |
679 | FILL( 12, 0 ); | |
680 | FILL( 3, 0xf5 ); | |
681 | *p++ = 0xfe; | |
682 | *p++ = desc->track; | |
683 | *p++ = desc->head; | |
684 | *p++ = (nsect + sect - desc->sect_offset) % nsect + 1; | |
685 | *p++ = 2; | |
686 | *p++ = 0xf7; | |
687 | FILL( 22, 0x4e ); | |
688 | FILL( 12, 0 ); | |
689 | FILL( 3, 0xf5 ); | |
690 | *p++ = 0xfb; | |
691 | FILL( 512, 0xe5 ); | |
692 | *p++ = 0xf7; | |
693 | FILL( 40, 0x4e ); | |
694 | } | |
695 | FILL( TrackBuffer+BUFFER_SIZE-p, 0x4e ); | |
696 | ||
697 | IsFormatting = 1; | |
698 | FormatError = 0; | |
699 | ReqTrack = desc->track; | |
700 | ReqSide = desc->head; | |
701 | do_fd_action( drive ); | |
702 | ||
703 | sleep_on( &format_wait ); | |
704 | ||
705 | redo_fd_request(); | |
706 | return( FormatError ? -EIO : 0 ); | |
707 | } | |
708 | ||
709 | ||
710 | /* do_fd_action() is the general procedure for a fd request: All | |
711 | * required parameter settings (drive select, side select, track | |
712 | * position) are checked and set if needed. For each of these | |
713 | * parameters and the actual reading or writing exist two functions: | |
714 | * one that starts the setting (or skips it if possible) and one | |
715 | * callback for the "done" interrupt. Each done func calls the next | |
716 | * set function to propagate the request down to fd_rwsec_done(). | |
717 | */ | |
718 | ||
719 | static void do_fd_action( int drive ) | |
720 | { | |
721 | DPRINT(("do_fd_action\n")); | |
722 | ||
723 | if (UseTrackbuffer && !IsFormatting) { | |
724 | repeat: | |
725 | if (IS_BUFFERED( drive, ReqSide, ReqTrack )) { | |
726 | if (ReqCmd == READ) { | |
727 | copy_buffer( SECTOR_BUFFER(ReqSector), ReqData ); | |
728 | if (++ReqCnt < CURRENT->current_nr_sectors) { | |
729 | /* read next sector */ | |
730 | setup_req_params( drive ); | |
731 | goto repeat; | |
732 | } | |
733 | else { | |
734 | /* all sectors finished */ | |
735 | CURRENT->nr_sectors -= CURRENT->current_nr_sectors; | |
736 | CURRENT->sector += CURRENT->current_nr_sectors; | |
737 | end_request(CURRENT, 1); | |
738 | redo_fd_request(); | |
739 | return; | |
740 | } | |
741 | } | |
742 | else { | |
743 | /* cmd == WRITE, pay attention to track buffer | |
744 | * consistency! */ | |
745 | copy_buffer( ReqData, SECTOR_BUFFER(ReqSector) ); | |
746 | } | |
747 | } | |
748 | } | |
749 | ||
750 | if (SelectedDrive != drive) | |
751 | fd_select_drive( drive ); | |
752 | ||
753 | if (UD.track == -1) | |
754 | fd_calibrate(); | |
755 | else if (UD.track != ReqTrack << UDT->stretch) | |
756 | fd_seek(); | |
757 | else if (IsFormatting) | |
758 | fd_writetrack(); | |
759 | else | |
760 | fd_rwsec(); | |
761 | } | |
762 | ||
763 | ||
764 | /* Seek to track 0 if the current track is unknown */ | |
765 | ||
766 | static void fd_calibrate( void ) | |
767 | { | |
768 | if (SUD.track >= 0) { | |
769 | fd_calibrate_done( 0 ); | |
770 | return; | |
771 | } | |
772 | ||
773 | if (ATARIHW_PRESENT(FDCSPEED)) | |
774 | dma_wd.fdc_speed = 0; /* always seek with 8 Mhz */; | |
775 | DPRINT(("fd_calibrate\n")); | |
776 | SET_IRQ_HANDLER( fd_calibrate_done ); | |
777 | /* we can't verify, since the speed may be incorrect */ | |
778 | FDC_WRITE( FDCREG_CMD, FDCCMD_RESTORE | SUD.steprate ); | |
779 | ||
780 | NeedSeek = 1; | |
781 | MotorOn = 1; | |
782 | start_timeout(); | |
783 | /* wait for IRQ */ | |
784 | } | |
785 | ||
786 | ||
787 | static void fd_calibrate_done( int status ) | |
788 | { | |
789 | DPRINT(("fd_calibrate_done()\n")); | |
790 | stop_timeout(); | |
791 | ||
792 | /* set the correct speed now */ | |
793 | if (ATARIHW_PRESENT(FDCSPEED)) | |
794 | dma_wd.fdc_speed = SUDT->fdc_speed; | |
795 | if (status & FDCSTAT_RECNF) { | |
796 | printk(KERN_ERR "fd%d: restore failed\n", SelectedDrive ); | |
797 | fd_error(); | |
798 | } | |
799 | else { | |
800 | SUD.track = 0; | |
801 | fd_seek(); | |
802 | } | |
803 | } | |
804 | ||
805 | ||
806 | /* Seek the drive to the requested track. The drive must have been | |
807 | * calibrated at some point before this. | |
808 | */ | |
809 | ||
810 | static void fd_seek( void ) | |
811 | { | |
812 | if (SUD.track == ReqTrack << SUDT->stretch) { | |
813 | fd_seek_done( 0 ); | |
814 | return; | |
815 | } | |
816 | ||
817 | if (ATARIHW_PRESENT(FDCSPEED)) { | |
818 | dma_wd.fdc_speed = 0; /* always seek witch 8 Mhz */ | |
819 | MFPDELAY(); | |
820 | } | |
821 | ||
822 | DPRINT(("fd_seek() to track %d\n",ReqTrack)); | |
823 | FDC_WRITE( FDCREG_DATA, ReqTrack << SUDT->stretch); | |
824 | udelay(25); | |
825 | SET_IRQ_HANDLER( fd_seek_done ); | |
826 | FDC_WRITE( FDCREG_CMD, FDCCMD_SEEK | SUD.steprate ); | |
827 | ||
828 | MotorOn = 1; | |
829 | set_head_settle_flag(); | |
830 | start_timeout(); | |
831 | /* wait for IRQ */ | |
832 | } | |
833 | ||
834 | ||
835 | static void fd_seek_done( int status ) | |
836 | { | |
837 | DPRINT(("fd_seek_done()\n")); | |
838 | stop_timeout(); | |
839 | ||
840 | /* set the correct speed */ | |
841 | if (ATARIHW_PRESENT(FDCSPEED)) | |
842 | dma_wd.fdc_speed = SUDT->fdc_speed; | |
843 | if (status & FDCSTAT_RECNF) { | |
844 | printk(KERN_ERR "fd%d: seek error (to track %d)\n", | |
845 | SelectedDrive, ReqTrack ); | |
846 | /* we don't know exactly which track we are on now! */ | |
847 | SUD.track = -1; | |
848 | fd_error(); | |
849 | } | |
850 | else { | |
851 | SUD.track = ReqTrack << SUDT->stretch; | |
852 | NeedSeek = 0; | |
853 | if (IsFormatting) | |
854 | fd_writetrack(); | |
855 | else | |
856 | fd_rwsec(); | |
857 | } | |
858 | } | |
859 | ||
860 | ||
861 | /* This does the actual reading/writing after positioning the head | |
862 | * over the correct track. | |
863 | */ | |
864 | ||
865 | static int MultReadInProgress = 0; | |
866 | ||
867 | ||
868 | static void fd_rwsec( void ) | |
869 | { | |
870 | unsigned long paddr, flags; | |
871 | unsigned int rwflag, old_motoron; | |
872 | unsigned int track; | |
873 | ||
874 | DPRINT(("fd_rwsec(), Sec=%d, Access=%c\n",ReqSector, ReqCmd == WRITE ? 'w' : 'r' )); | |
875 | if (ReqCmd == WRITE) { | |
876 | if (ATARIHW_PRESENT(EXTD_DMA)) { | |
877 | paddr = virt_to_phys(ReqData); | |
878 | } | |
879 | else { | |
880 | copy_buffer( ReqData, DMABuffer ); | |
881 | paddr = PhysDMABuffer; | |
882 | } | |
883 | dma_cache_maintenance( paddr, 512, 1 ); | |
884 | rwflag = 0x100; | |
885 | } | |
886 | else { | |
887 | if (read_track) | |
888 | paddr = PhysTrackBuffer; | |
889 | else | |
890 | paddr = ATARIHW_PRESENT(EXTD_DMA) ? | |
891 | virt_to_phys(ReqData) : PhysDMABuffer; | |
892 | rwflag = 0; | |
893 | } | |
894 | ||
895 | fd_select_side( ReqSide ); | |
896 | ||
897 | /* Start sector of this operation */ | |
898 | FDC_WRITE( FDCREG_SECTOR, read_track ? 1 : ReqSector ); | |
899 | MFPDELAY(); | |
900 | /* Cheat for track if stretch != 0 */ | |
901 | if (SUDT->stretch) { | |
902 | track = FDC_READ( FDCREG_TRACK); | |
903 | MFPDELAY(); | |
904 | FDC_WRITE( FDCREG_TRACK, track >> SUDT->stretch); | |
905 | } | |
906 | udelay(25); | |
907 | ||
908 | /* Setup DMA */ | |
909 | local_irq_save(flags); | |
910 | dma_wd.dma_lo = (unsigned char)paddr; | |
911 | MFPDELAY(); | |
912 | paddr >>= 8; | |
913 | dma_wd.dma_md = (unsigned char)paddr; | |
914 | MFPDELAY(); | |
915 | paddr >>= 8; | |
916 | if (ATARIHW_PRESENT(EXTD_DMA)) | |
917 | st_dma_ext_dmahi = (unsigned short)paddr; | |
918 | else | |
919 | dma_wd.dma_hi = (unsigned char)paddr; | |
920 | MFPDELAY(); | |
921 | local_irq_restore(flags); | |
922 | ||
923 | /* Clear FIFO and switch DMA to correct mode */ | |
924 | dma_wd.dma_mode_status = 0x90 | rwflag; | |
925 | MFPDELAY(); | |
926 | dma_wd.dma_mode_status = 0x90 | (rwflag ^ 0x100); | |
927 | MFPDELAY(); | |
928 | dma_wd.dma_mode_status = 0x90 | rwflag; | |
929 | MFPDELAY(); | |
930 | ||
931 | /* How many sectors for DMA */ | |
932 | dma_wd.fdc_acces_seccount = read_track ? SUDT->spt : 1; | |
933 | ||
934 | udelay(25); | |
935 | ||
936 | /* Start operation */ | |
937 | dma_wd.dma_mode_status = FDCSELREG_STP | rwflag; | |
938 | udelay(25); | |
939 | SET_IRQ_HANDLER( fd_rwsec_done ); | |
940 | dma_wd.fdc_acces_seccount = | |
941 | (get_head_settle_flag() | | |
942 | (rwflag ? FDCCMD_WRSEC : (FDCCMD_RDSEC | (read_track ? FDCCMDADD_M : 0)))); | |
943 | ||
944 | old_motoron = MotorOn; | |
945 | MotorOn = 1; | |
946 | NeedSeek = 1; | |
947 | /* wait for interrupt */ | |
948 | ||
949 | if (read_track) { | |
950 | /* If reading a whole track, wait about one disk rotation and | |
951 | * then check if all sectors are read. The FDC will even | |
952 | * search for the first non-existent sector and need 1 sec to | |
953 | * recognise that it isn't present :-( | |
954 | */ | |
955 | MultReadInProgress = 1; | |
956 | mod_timer(&readtrack_timer, | |
957 | /* 1 rot. + 5 rot.s if motor was off */ | |
958 | jiffies + HZ/5 + (old_motoron ? 0 : HZ)); | |
959 | } | |
960 | start_timeout(); | |
961 | } | |
962 | ||
963 | ||
964 | static void fd_readtrack_check( unsigned long dummy ) | |
965 | { | |
966 | unsigned long flags, addr, addr2; | |
967 | ||
968 | local_irq_save(flags); | |
969 | ||
970 | if (!MultReadInProgress) { | |
971 | /* This prevents a race condition that could arise if the | |
972 | * interrupt is triggered while the calling of this timer | |
973 | * callback function takes place. The IRQ function then has | |
974 | * already cleared 'MultReadInProgress' when flow of control | |
975 | * gets here. | |
976 | */ | |
977 | local_irq_restore(flags); | |
978 | return; | |
979 | } | |
980 | ||
981 | /* get the current DMA address */ | |
982 | /* ++ f.a. read twice to avoid being fooled by switcher */ | |
983 | addr = 0; | |
984 | do { | |
985 | addr2 = addr; | |
986 | addr = dma_wd.dma_lo & 0xff; | |
987 | MFPDELAY(); | |
988 | addr |= (dma_wd.dma_md & 0xff) << 8; | |
989 | MFPDELAY(); | |
990 | if (ATARIHW_PRESENT( EXTD_DMA )) | |
991 | addr |= (st_dma_ext_dmahi & 0xffff) << 16; | |
992 | else | |
993 | addr |= (dma_wd.dma_hi & 0xff) << 16; | |
994 | MFPDELAY(); | |
995 | } while(addr != addr2); | |
996 | ||
997 | if (addr >= PhysTrackBuffer + SUDT->spt*512) { | |
998 | /* already read enough data, force an FDC interrupt to stop | |
999 | * the read operation | |
1000 | */ | |
1001 | SET_IRQ_HANDLER( NULL ); | |
1002 | MultReadInProgress = 0; | |
1003 | local_irq_restore(flags); | |
1004 | DPRINT(("fd_readtrack_check(): done\n")); | |
1005 | FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); | |
1006 | udelay(25); | |
1007 | ||
1008 | /* No error until now -- the FDC would have interrupted | |
1009 | * otherwise! | |
1010 | */ | |
1011 | fd_rwsec_done1(0); | |
1012 | } | |
1013 | else { | |
1014 | /* not yet finished, wait another tenth rotation */ | |
1015 | local_irq_restore(flags); | |
1016 | DPRINT(("fd_readtrack_check(): not yet finished\n")); | |
1017 | mod_timer(&readtrack_timer, jiffies + HZ/5/10); | |
1018 | } | |
1019 | } | |
1020 | ||
1021 | ||
1022 | static void fd_rwsec_done( int status ) | |
1023 | { | |
1024 | DPRINT(("fd_rwsec_done()\n")); | |
1025 | ||
1026 | if (read_track) { | |
1027 | del_timer(&readtrack_timer); | |
1028 | if (!MultReadInProgress) | |
1029 | return; | |
1030 | MultReadInProgress = 0; | |
1031 | } | |
1032 | fd_rwsec_done1(status); | |
1033 | } | |
1034 | ||
1035 | static void fd_rwsec_done1(int status) | |
1036 | { | |
1037 | unsigned int track; | |
1038 | ||
1039 | stop_timeout(); | |
1040 | ||
1041 | /* Correct the track if stretch != 0 */ | |
1042 | if (SUDT->stretch) { | |
1043 | track = FDC_READ( FDCREG_TRACK); | |
1044 | MFPDELAY(); | |
1045 | FDC_WRITE( FDCREG_TRACK, track << SUDT->stretch); | |
1046 | } | |
1047 | ||
1048 | if (!UseTrackbuffer) { | |
1049 | dma_wd.dma_mode_status = 0x90; | |
1050 | MFPDELAY(); | |
1051 | if (!(dma_wd.dma_mode_status & 0x01)) { | |
1052 | printk(KERN_ERR "fd%d: DMA error\n", SelectedDrive ); | |
1053 | goto err_end; | |
1054 | } | |
1055 | } | |
1056 | MFPDELAY(); | |
1057 | ||
1058 | if (ReqCmd == WRITE && (status & FDCSTAT_WPROT)) { | |
1059 | printk(KERN_NOTICE "fd%d: is write protected\n", SelectedDrive ); | |
1060 | goto err_end; | |
1061 | } | |
1062 | if ((status & FDCSTAT_RECNF) && | |
1063 | /* RECNF is no error after a multiple read when the FDC | |
1064 | searched for a non-existent sector! */ | |
1065 | !(read_track && FDC_READ(FDCREG_SECTOR) > SUDT->spt)) { | |
1066 | if (Probing) { | |
1067 | if (SUDT > disk_type) { | |
1068 | if (SUDT[-1].blocks > ReqBlock) { | |
1069 | /* try another disk type */ | |
1070 | SUDT--; | |
1071 | set_capacity(unit[SelectedDrive].disk, | |
1072 | SUDT->blocks); | |
1073 | } else | |
1074 | Probing = 0; | |
1075 | } | |
1076 | else { | |
1077 | if (SUD.flags & FTD_MSG) | |
1078 | printk(KERN_INFO "fd%d: Auto-detected floppy type %s\n", | |
1079 | SelectedDrive, SUDT->name ); | |
1080 | Probing=0; | |
1081 | } | |
1082 | } else { | |
1083 | /* record not found, but not probing. Maybe stretch wrong ? Restart probing */ | |
1084 | if (SUD.autoprobe) { | |
1085 | SUDT = disk_type + StartDiskType[DriveType]; | |
1086 | set_capacity(unit[SelectedDrive].disk, | |
1087 | SUDT->blocks); | |
1088 | Probing = 1; | |
1089 | } | |
1090 | } | |
1091 | if (Probing) { | |
1092 | if (ATARIHW_PRESENT(FDCSPEED)) { | |
1093 | dma_wd.fdc_speed = SUDT->fdc_speed; | |
1094 | MFPDELAY(); | |
1095 | } | |
1096 | setup_req_params( SelectedDrive ); | |
1097 | BufferDrive = -1; | |
1098 | do_fd_action( SelectedDrive ); | |
1099 | return; | |
1100 | } | |
1101 | ||
1102 | printk(KERN_ERR "fd%d: sector %d not found (side %d, track %d)\n", | |
1103 | SelectedDrive, FDC_READ (FDCREG_SECTOR), ReqSide, ReqTrack ); | |
1104 | goto err_end; | |
1105 | } | |
1106 | if (status & FDCSTAT_CRC) { | |
1107 | printk(KERN_ERR "fd%d: CRC error (side %d, track %d, sector %d)\n", | |
1108 | SelectedDrive, ReqSide, ReqTrack, FDC_READ (FDCREG_SECTOR) ); | |
1109 | goto err_end; | |
1110 | } | |
1111 | if (status & FDCSTAT_LOST) { | |
1112 | printk(KERN_ERR "fd%d: lost data (side %d, track %d, sector %d)\n", | |
1113 | SelectedDrive, ReqSide, ReqTrack, FDC_READ (FDCREG_SECTOR) ); | |
1114 | goto err_end; | |
1115 | } | |
1116 | ||
1117 | Probing = 0; | |
1118 | ||
1119 | if (ReqCmd == READ) { | |
1120 | if (!read_track) { | |
1121 | void *addr; | |
1122 | addr = ATARIHW_PRESENT( EXTD_DMA ) ? ReqData : DMABuffer; | |
1123 | dma_cache_maintenance( virt_to_phys(addr), 512, 0 ); | |
1124 | if (!ATARIHW_PRESENT( EXTD_DMA )) | |
1125 | copy_buffer (addr, ReqData); | |
1126 | } else { | |
1127 | dma_cache_maintenance( PhysTrackBuffer, MaxSectors[DriveType] * 512, 0 ); | |
1128 | BufferDrive = SelectedDrive; | |
1129 | BufferSide = ReqSide; | |
1130 | BufferTrack = ReqTrack; | |
1131 | copy_buffer (SECTOR_BUFFER (ReqSector), ReqData); | |
1132 | } | |
1133 | } | |
1134 | ||
1135 | if (++ReqCnt < CURRENT->current_nr_sectors) { | |
1136 | /* read next sector */ | |
1137 | setup_req_params( SelectedDrive ); | |
1138 | do_fd_action( SelectedDrive ); | |
1139 | } | |
1140 | else { | |
1141 | /* all sectors finished */ | |
1142 | CURRENT->nr_sectors -= CURRENT->current_nr_sectors; | |
1143 | CURRENT->sector += CURRENT->current_nr_sectors; | |
1144 | end_request(CURRENT, 1); | |
1145 | redo_fd_request(); | |
1146 | } | |
1147 | return; | |
1148 | ||
1149 | err_end: | |
1150 | BufferDrive = -1; | |
1151 | fd_error(); | |
1152 | } | |
1153 | ||
1154 | ||
1155 | static void fd_writetrack( void ) | |
1156 | { | |
1157 | unsigned long paddr, flags; | |
1158 | unsigned int track; | |
1159 | ||
1160 | DPRINT(("fd_writetrack() Tr=%d Si=%d\n", ReqTrack, ReqSide )); | |
1161 | ||
1162 | paddr = PhysTrackBuffer; | |
1163 | dma_cache_maintenance( paddr, BUFFER_SIZE, 1 ); | |
1164 | ||
1165 | fd_select_side( ReqSide ); | |
1166 | ||
1167 | /* Cheat for track if stretch != 0 */ | |
1168 | if (SUDT->stretch) { | |
1169 | track = FDC_READ( FDCREG_TRACK); | |
1170 | MFPDELAY(); | |
1171 | FDC_WRITE(FDCREG_TRACK,track >> SUDT->stretch); | |
1172 | } | |
1173 | udelay(40); | |
1174 | ||
1175 | /* Setup DMA */ | |
1176 | local_irq_save(flags); | |
1177 | dma_wd.dma_lo = (unsigned char)paddr; | |
1178 | MFPDELAY(); | |
1179 | paddr >>= 8; | |
1180 | dma_wd.dma_md = (unsigned char)paddr; | |
1181 | MFPDELAY(); | |
1182 | paddr >>= 8; | |
1183 | if (ATARIHW_PRESENT( EXTD_DMA )) | |
1184 | st_dma_ext_dmahi = (unsigned short)paddr; | |
1185 | else | |
1186 | dma_wd.dma_hi = (unsigned char)paddr; | |
1187 | MFPDELAY(); | |
1188 | local_irq_restore(flags); | |
1189 | ||
1190 | /* Clear FIFO and switch DMA to correct mode */ | |
1191 | dma_wd.dma_mode_status = 0x190; | |
1192 | MFPDELAY(); | |
1193 | dma_wd.dma_mode_status = 0x90; | |
1194 | MFPDELAY(); | |
1195 | dma_wd.dma_mode_status = 0x190; | |
1196 | MFPDELAY(); | |
1197 | ||
1198 | /* How many sectors for DMA */ | |
1199 | dma_wd.fdc_acces_seccount = BUFFER_SIZE/512; | |
1200 | udelay(40); | |
1201 | ||
1202 | /* Start operation */ | |
1203 | dma_wd.dma_mode_status = FDCSELREG_STP | 0x100; | |
1204 | udelay(40); | |
1205 | SET_IRQ_HANDLER( fd_writetrack_done ); | |
1206 | dma_wd.fdc_acces_seccount = FDCCMD_WRTRA | get_head_settle_flag(); | |
1207 | ||
1208 | MotorOn = 1; | |
1209 | start_timeout(); | |
1210 | /* wait for interrupt */ | |
1211 | } | |
1212 | ||
1213 | ||
1214 | static void fd_writetrack_done( int status ) | |
1215 | { | |
1216 | DPRINT(("fd_writetrack_done()\n")); | |
1217 | ||
1218 | stop_timeout(); | |
1219 | ||
1220 | if (status & FDCSTAT_WPROT) { | |
1221 | printk(KERN_NOTICE "fd%d: is write protected\n", SelectedDrive ); | |
1222 | goto err_end; | |
1223 | } | |
1224 | if (status & FDCSTAT_LOST) { | |
1225 | printk(KERN_ERR "fd%d: lost data (side %d, track %d)\n", | |
1226 | SelectedDrive, ReqSide, ReqTrack ); | |
1227 | goto err_end; | |
1228 | } | |
1229 | ||
1230 | wake_up( &format_wait ); | |
1231 | return; | |
1232 | ||
1233 | err_end: | |
1234 | fd_error(); | |
1235 | } | |
1236 | ||
1237 | static void fd_times_out( unsigned long dummy ) | |
1238 | { | |
1239 | atari_disable_irq( IRQ_MFP_FDC ); | |
1240 | if (!FloppyIRQHandler) goto end; /* int occurred after timer was fired, but | |
1241 | * before we came here... */ | |
1242 | ||
1243 | SET_IRQ_HANDLER( NULL ); | |
1244 | /* If the timeout occurred while the readtrack_check timer was | |
1245 | * active, we need to cancel it, else bad things will happen */ | |
1246 | if (UseTrackbuffer) | |
1247 | del_timer( &readtrack_timer ); | |
1248 | FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); | |
1249 | udelay( 25 ); | |
1250 | ||
1251 | printk(KERN_ERR "floppy timeout\n" ); | |
1252 | fd_error(); | |
1253 | end: | |
1254 | atari_enable_irq( IRQ_MFP_FDC ); | |
1255 | } | |
1256 | ||
1257 | ||
1258 | /* The (noop) seek operation here is needed to make the WP bit in the | |
1259 | * FDC status register accessible for check_change. If the last disk | |
1260 | * operation would have been a RDSEC, this bit would always read as 0 | |
1261 | * no matter what :-( To save time, the seek goes to the track we're | |
1262 | * already on. | |
1263 | */ | |
1264 | ||
1265 | static void finish_fdc( void ) | |
1266 | { | |
1267 | if (!NeedSeek) { | |
1268 | finish_fdc_done( 0 ); | |
1269 | } | |
1270 | else { | |
1271 | DPRINT(("finish_fdc: dummy seek started\n")); | |
1272 | FDC_WRITE (FDCREG_DATA, SUD.track); | |
1273 | SET_IRQ_HANDLER( finish_fdc_done ); | |
1274 | FDC_WRITE (FDCREG_CMD, FDCCMD_SEEK); | |
1275 | MotorOn = 1; | |
1276 | start_timeout(); | |
1277 | /* we must wait for the IRQ here, because the ST-DMA | |
1278 | is released immediately afterwards and the interrupt | |
1279 | may be delivered to the wrong driver. */ | |
1280 | } | |
1281 | } | |
1282 | ||
1283 | ||
1284 | static void finish_fdc_done( int dummy ) | |
1285 | { | |
1286 | unsigned long flags; | |
1287 | ||
1288 | DPRINT(("finish_fdc_done entered\n")); | |
1289 | stop_timeout(); | |
1290 | NeedSeek = 0; | |
1291 | ||
1292 | if (timer_pending(&fd_timer) && time_before(fd_timer.expires, jiffies + 5)) | |
1293 | /* If the check for a disk change is done too early after this | |
1294 | * last seek command, the WP bit still reads wrong :-(( | |
1295 | */ | |
1296 | mod_timer(&fd_timer, jiffies + 5); | |
1297 | else | |
1298 | start_check_change_timer(); | |
1299 | start_motor_off_timer(); | |
1300 | ||
1301 | local_irq_save(flags); | |
1302 | stdma_release(); | |
1303 | fdc_busy = 0; | |
1304 | wake_up( &fdc_wait ); | |
1305 | local_irq_restore(flags); | |
1306 | ||
1307 | DPRINT(("finish_fdc() finished\n")); | |
1308 | } | |
1309 | ||
1310 | /* The detection of disk changes is a dark chapter in Atari history :-( | |
1311 | * Because the "Drive ready" signal isn't present in the Atari | |
1312 | * hardware, one has to rely on the "Write Protect". This works fine, | |
1313 | * as long as no write protected disks are used. TOS solves this | |
1314 | * problem by introducing tri-state logic ("maybe changed") and | |
1315 | * looking at the serial number in block 0. This isn't possible for | |
1316 | * Linux, since the floppy driver can't make assumptions about the | |
1317 | * filesystem used on the disk and thus the contents of block 0. I've | |
1318 | * chosen the method to always say "The disk was changed" if it is | |
1319 | * unsure whether it was. This implies that every open or mount | |
1320 | * invalidates the disk buffers if you work with write protected | |
1321 | * disks. But at least this is better than working with incorrect data | |
1322 | * due to unrecognised disk changes. | |
1323 | */ | |
1324 | ||
1325 | static int check_floppy_change(struct gendisk *disk) | |
1326 | { | |
1327 | struct atari_floppy_struct *p = disk->private_data; | |
1328 | unsigned int drive = p - unit; | |
1329 | if (test_bit (drive, &fake_change)) { | |
1330 | /* simulated change (e.g. after formatting) */ | |
1331 | return 1; | |
1332 | } | |
1333 | if (test_bit (drive, &changed_floppies)) { | |
1334 | /* surely changed (the WP signal changed at least once) */ | |
1335 | return 1; | |
1336 | } | |
1337 | if (UD.wpstat) { | |
1338 | /* WP is on -> could be changed: to be sure, buffers should be | |
1339 | * invalidated... | |
1340 | */ | |
1341 | return 1; | |
1342 | } | |
1343 | ||
1344 | return 0; | |
1345 | } | |
1346 | ||
1347 | static int floppy_revalidate(struct gendisk *disk) | |
1348 | { | |
1349 | struct atari_floppy_struct *p = disk->private_data; | |
1350 | unsigned int drive = p - unit; | |
1351 | ||
1352 | if (test_bit(drive, &changed_floppies) || | |
1353 | test_bit(drive, &fake_change) || | |
1354 | p->disktype == 0) { | |
1355 | if (UD.flags & FTD_MSG) | |
1356 | printk(KERN_ERR "floppy: clear format %p!\n", UDT); | |
1357 | BufferDrive = -1; | |
1358 | clear_bit(drive, &fake_change); | |
1359 | clear_bit(drive, &changed_floppies); | |
1360 | /* MSch: clearing geometry makes sense only for autoprobe | |
1361 | formats, for 'permanent user-defined' parameter: | |
1362 | restore default_params[] here if flagged valid! */ | |
1363 | if (default_params[drive].blocks == 0) | |
1364 | UDT = 0; | |
1365 | else | |
1366 | UDT = &default_params[drive]; | |
1367 | } | |
1368 | return 0; | |
1369 | } | |
1370 | ||
1371 | ||
1372 | /* This sets up the global variables describing the current request. */ | |
1373 | ||
1374 | static void setup_req_params( int drive ) | |
1375 | { | |
1376 | int block = ReqBlock + ReqCnt; | |
1377 | ||
1378 | ReqTrack = block / UDT->spt; | |
1379 | ReqSector = block - ReqTrack * UDT->spt + 1; | |
1380 | ReqSide = ReqTrack & 1; | |
1381 | ReqTrack >>= 1; | |
1382 | ReqData = ReqBuffer + 512 * ReqCnt; | |
1383 | ||
1384 | if (UseTrackbuffer) | |
1385 | read_track = (ReqCmd == READ && CURRENT->errors == 0); | |
1386 | else | |
1387 | read_track = 0; | |
1388 | ||
1389 | DPRINT(("Request params: Si=%d Tr=%d Se=%d Data=%08lx\n",ReqSide, | |
1390 | ReqTrack, ReqSector, (unsigned long)ReqData )); | |
1391 | } | |
1392 | ||
1393 | ||
1394 | static void redo_fd_request(void) | |
1395 | { | |
1396 | int drive, type; | |
1397 | struct atari_floppy_struct *floppy; | |
1398 | ||
1399 | DPRINT(("redo_fd_request: CURRENT=%p dev=%s CURRENT->sector=%ld\n", | |
1400 | CURRENT, CURRENT ? CURRENT->rq_disk->disk_name : "", | |
1401 | CURRENT ? CURRENT->sector : 0 )); | |
1402 | ||
1403 | IsFormatting = 0; | |
1404 | ||
1405 | repeat: | |
1406 | ||
1407 | if (!CURRENT) | |
1408 | goto the_end; | |
1409 | ||
1410 | floppy = CURRENT->rq_disk->private_data; | |
1411 | drive = floppy - unit; | |
1412 | type = floppy->type; | |
1413 | ||
1414 | if (!UD.connected) { | |
1415 | /* drive not connected */ | |
1416 | printk(KERN_ERR "Unknown Device: fd%d\n", drive ); | |
1417 | end_request(CURRENT, 0); | |
1418 | goto repeat; | |
1419 | } | |
1420 | ||
1421 | if (type == 0) { | |
1422 | if (!UDT) { | |
1423 | Probing = 1; | |
1424 | UDT = disk_type + StartDiskType[DriveType]; | |
1425 | set_capacity(floppy->disk, UDT->blocks); | |
1426 | UD.autoprobe = 1; | |
1427 | } | |
1428 | } | |
1429 | else { | |
1430 | /* user supplied disk type */ | |
1431 | if (--type >= NUM_DISK_MINORS) { | |
1432 | printk(KERN_WARNING "fd%d: invalid disk format", drive ); | |
1433 | end_request(CURRENT, 0); | |
1434 | goto repeat; | |
1435 | } | |
1436 | if (minor2disktype[type].drive_types > DriveType) { | |
1437 | printk(KERN_WARNING "fd%d: unsupported disk format", drive ); | |
1438 | end_request(CURRENT, 0); | |
1439 | goto repeat; | |
1440 | } | |
1441 | type = minor2disktype[type].index; | |
1442 | UDT = &disk_type[type]; | |
1443 | set_capacity(floppy->disk, UDT->blocks); | |
1444 | UD.autoprobe = 0; | |
1445 | } | |
1446 | ||
1447 | if (CURRENT->sector + 1 > UDT->blocks) { | |
1448 | end_request(CURRENT, 0); | |
1449 | goto repeat; | |
1450 | } | |
1451 | ||
1452 | /* stop deselect timer */ | |
1453 | del_timer( &motor_off_timer ); | |
1454 | ||
1455 | ReqCnt = 0; | |
1456 | ReqCmd = rq_data_dir(CURRENT); | |
1457 | ReqBlock = CURRENT->sector; | |
1458 | ReqBuffer = CURRENT->buffer; | |
1459 | setup_req_params( drive ); | |
1460 | do_fd_action( drive ); | |
1461 | ||
1462 | return; | |
1463 | ||
1464 | the_end: | |
1465 | finish_fdc(); | |
1466 | } | |
1467 | ||
1468 | ||
1469 | void do_fd_request(request_queue_t * q) | |
1470 | { | |
1471 | unsigned long flags; | |
1472 | ||
1473 | DPRINT(("do_fd_request for pid %d\n",current->pid)); | |
1474 | while( fdc_busy ) sleep_on( &fdc_wait ); | |
1475 | fdc_busy = 1; | |
1476 | stdma_lock(floppy_irq, NULL); | |
1477 | ||
1478 | atari_disable_irq( IRQ_MFP_FDC ); | |
1479 | local_save_flags(flags); /* The request function is called with ints | |
1480 | local_irq_disable(); * disabled... so must save the IPL for later */ | |
1481 | redo_fd_request(); | |
1482 | local_irq_restore(flags); | |
1483 | atari_enable_irq( IRQ_MFP_FDC ); | |
1484 | } | |
1485 | ||
1486 | static int fd_ioctl(struct inode *inode, struct file *filp, | |
1487 | unsigned int cmd, unsigned long param) | |
1488 | { | |
1489 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
1490 | struct atari_floppy_struct *floppy = disk->private_data; | |
1491 | int drive = floppy - unit; | |
1492 | int type = floppy->type; | |
1493 | struct atari_format_descr fmt_desc; | |
1494 | struct atari_disk_type *dtp; | |
1495 | struct floppy_struct getprm; | |
1496 | int settype; | |
1497 | struct floppy_struct setprm; | |
1498 | ||
1499 | switch (cmd) { | |
1500 | case FDGETPRM: | |
1501 | if (type) { | |
1502 | if (--type >= NUM_DISK_MINORS) | |
1503 | return -ENODEV; | |
1504 | if (minor2disktype[type].drive_types > DriveType) | |
1505 | return -ENODEV; | |
1506 | type = minor2disktype[type].index; | |
1507 | dtp = &disk_type[type]; | |
1508 | if (UD.flags & FTD_MSG) | |
1509 | printk (KERN_ERR "floppy%d: found dtp %p name %s!\n", | |
1510 | drive, dtp, dtp->name); | |
1511 | } | |
1512 | else { | |
1513 | if (!UDT) | |
1514 | return -ENXIO; | |
1515 | else | |
1516 | dtp = UDT; | |
1517 | } | |
1518 | memset((void *)&getprm, 0, sizeof(getprm)); | |
1519 | getprm.size = dtp->blocks; | |
1520 | getprm.sect = dtp->spt; | |
1521 | getprm.head = 2; | |
1522 | getprm.track = dtp->blocks/dtp->spt/2; | |
1523 | getprm.stretch = dtp->stretch; | |
1524 | if (copy_to_user((void *)param, &getprm, sizeof(getprm))) | |
1525 | return -EFAULT; | |
1526 | return 0; | |
1527 | } | |
1528 | switch (cmd) { | |
1529 | case FDSETPRM: | |
1530 | case FDDEFPRM: | |
1531 | /* | |
1532 | * MSch 7/96: simple 'set geometry' case: just set the | |
1533 | * 'default' device params (minor == 0). | |
1534 | * Currently, the drive geometry is cleared after each | |
1535 | * disk change and subsequent revalidate()! simple | |
1536 | * implementation of FDDEFPRM: save geometry from a | |
1537 | * FDDEFPRM call and restore it in floppy_revalidate() ! | |
1538 | */ | |
1539 | ||
1540 | /* get the parameters from user space */ | |
1541 | if (floppy->ref != 1 && floppy->ref != -1) | |
1542 | return -EBUSY; | |
1543 | if (copy_from_user(&setprm, (void *) param, sizeof(setprm))) | |
1544 | return -EFAULT; | |
1545 | /* | |
1546 | * first of all: check for floppy change and revalidate, | |
1547 | * or the next access will revalidate - and clear UDT :-( | |
1548 | */ | |
1549 | ||
1550 | if (check_floppy_change(disk)) | |
1551 | floppy_revalidate(disk); | |
1552 | ||
1553 | if (UD.flags & FTD_MSG) | |
1554 | printk (KERN_INFO "floppy%d: setting size %d spt %d str %d!\n", | |
1555 | drive, setprm.size, setprm.sect, setprm.stretch); | |
1556 | ||
1557 | /* what if type > 0 here? Overwrite specified entry ? */ | |
1558 | if (type) { | |
1559 | /* refuse to re-set a predefined type for now */ | |
1560 | redo_fd_request(); | |
1561 | return -EINVAL; | |
1562 | } | |
1563 | ||
1564 | /* | |
1565 | * type == 0: first look for a matching entry in the type list, | |
1566 | * and set the UD.disktype field to use the perdefined entry. | |
1567 | * TODO: add user-defined format to head of autoprobe list ? | |
1568 | * Useful to include the user-type for future autodetection! | |
1569 | */ | |
1570 | ||
1571 | for (settype = 0; settype < NUM_DISK_MINORS; settype++) { | |
1572 | int setidx = 0; | |
1573 | if (minor2disktype[settype].drive_types > DriveType) { | |
1574 | /* skip this one, invalid for drive ... */ | |
1575 | continue; | |
1576 | } | |
1577 | setidx = minor2disktype[settype].index; | |
1578 | dtp = &disk_type[setidx]; | |
1579 | ||
1580 | /* found matching entry ?? */ | |
1581 | if ( dtp->blocks == setprm.size | |
1582 | && dtp->spt == setprm.sect | |
1583 | && dtp->stretch == setprm.stretch ) { | |
1584 | if (UD.flags & FTD_MSG) | |
1585 | printk (KERN_INFO "floppy%d: setting %s %p!\n", | |
1586 | drive, dtp->name, dtp); | |
1587 | UDT = dtp; | |
1588 | set_capacity(floppy->disk, UDT->blocks); | |
1589 | ||
1590 | if (cmd == FDDEFPRM) { | |
1591 | /* save settings as permanent default type */ | |
1592 | default_params[drive].name = dtp->name; | |
1593 | default_params[drive].spt = dtp->spt; | |
1594 | default_params[drive].blocks = dtp->blocks; | |
1595 | default_params[drive].fdc_speed = dtp->fdc_speed; | |
1596 | default_params[drive].stretch = dtp->stretch; | |
1597 | } | |
1598 | ||
1599 | return 0; | |
1600 | } | |
1601 | ||
1602 | } | |
1603 | ||
1604 | /* no matching disk type found above - setting user_params */ | |
1605 | ||
1606 | if (cmd == FDDEFPRM) { | |
1607 | /* set permanent type */ | |
1608 | dtp = &default_params[drive]; | |
1609 | } else | |
1610 | /* set user type (reset by disk change!) */ | |
1611 | dtp = &user_params[drive]; | |
1612 | ||
1613 | dtp->name = "user format"; | |
1614 | dtp->blocks = setprm.size; | |
1615 | dtp->spt = setprm.sect; | |
1616 | if (setprm.sect > 14) | |
1617 | dtp->fdc_speed = 3; | |
1618 | else | |
1619 | dtp->fdc_speed = 0; | |
1620 | dtp->stretch = setprm.stretch; | |
1621 | ||
1622 | if (UD.flags & FTD_MSG) | |
1623 | printk (KERN_INFO "floppy%d: blk %d spt %d str %d!\n", | |
1624 | drive, dtp->blocks, dtp->spt, dtp->stretch); | |
1625 | ||
1626 | /* sanity check */ | |
1627 | if (!dtp || setprm.track != dtp->blocks/dtp->spt/2 || | |
1628 | setprm.head != 2) { | |
1629 | redo_fd_request(); | |
1630 | return -EINVAL; | |
1631 | } | |
1632 | ||
1633 | UDT = dtp; | |
1634 | set_capacity(floppy->disk, UDT->blocks); | |
1635 | ||
1636 | return 0; | |
1637 | case FDMSGON: | |
1638 | UD.flags |= FTD_MSG; | |
1639 | return 0; | |
1640 | case FDMSGOFF: | |
1641 | UD.flags &= ~FTD_MSG; | |
1642 | return 0; | |
1643 | case FDSETEMSGTRESH: | |
1644 | return -EINVAL; | |
1645 | case FDFMTBEG: | |
1646 | return 0; | |
1647 | case FDFMTTRK: | |
1648 | if (floppy->ref != 1 && floppy->ref != -1) | |
1649 | return -EBUSY; | |
1650 | if (copy_from_user(&fmt_desc, (void *) param, sizeof(fmt_desc))) | |
1651 | return -EFAULT; | |
1652 | return do_format(drive, type, &fmt_desc); | |
1653 | case FDCLRPRM: | |
1654 | UDT = NULL; | |
1655 | /* MSch: invalidate default_params */ | |
1656 | default_params[drive].blocks = 0; | |
1657 | set_capacity(floppy->disk, MAX_DISK_SIZE * 2); | |
1658 | case FDFMTEND: | |
1659 | case FDFLUSH: | |
1660 | /* invalidate the buffer track to force a reread */ | |
1661 | BufferDrive = -1; | |
1662 | set_bit(drive, &fake_change); | |
1663 | check_disk_change(inode->i_bdev); | |
1664 | return 0; | |
1665 | default: | |
1666 | return -EINVAL; | |
1667 | } | |
1668 | } | |
1669 | ||
1670 | ||
1671 | /* Initialize the 'unit' variable for drive 'drive' */ | |
1672 | ||
1673 | static void __init fd_probe( int drive ) | |
1674 | { | |
1675 | UD.connected = 0; | |
1676 | UDT = NULL; | |
1677 | ||
1678 | if (!fd_test_drive_present( drive )) | |
1679 | return; | |
1680 | ||
1681 | UD.connected = 1; | |
1682 | UD.track = 0; | |
1683 | switch( UserSteprate[drive] ) { | |
1684 | case 2: | |
1685 | UD.steprate = FDCSTEP_2; | |
1686 | break; | |
1687 | case 3: | |
1688 | UD.steprate = FDCSTEP_3; | |
1689 | break; | |
1690 | case 6: | |
1691 | UD.steprate = FDCSTEP_6; | |
1692 | break; | |
1693 | case 12: | |
1694 | UD.steprate = FDCSTEP_12; | |
1695 | break; | |
1696 | default: /* should be -1 for "not set by user" */ | |
1697 | if (ATARIHW_PRESENT( FDCSPEED ) || MACH_IS_MEDUSA) | |
1698 | UD.steprate = FDCSTEP_3; | |
1699 | else | |
1700 | UD.steprate = FDCSTEP_6; | |
1701 | break; | |
1702 | } | |
1703 | MotorOn = 1; /* from probe restore operation! */ | |
1704 | } | |
1705 | ||
1706 | ||
1707 | /* This function tests the physical presence of a floppy drive (not | |
1708 | * whether a disk is inserted). This is done by issuing a restore | |
1709 | * command, waiting max. 2 seconds (that should be enough to move the | |
1710 | * head across the whole disk) and looking at the state of the "TR00" | |
1711 | * signal. This should now be raised if there is a drive connected | |
1712 | * (and there is no hardware failure :-) Otherwise, the drive is | |
1713 | * declared absent. | |
1714 | */ | |
1715 | ||
1716 | static int __init fd_test_drive_present( int drive ) | |
1717 | { | |
1718 | unsigned long timeout; | |
1719 | unsigned char status; | |
1720 | int ok; | |
1721 | ||
1722 | if (drive >= (MACH_IS_FALCON ? 1 : 2)) return( 0 ); | |
1723 | fd_select_drive( drive ); | |
1724 | ||
1725 | /* disable interrupt temporarily */ | |
1726 | atari_turnoff_irq( IRQ_MFP_FDC ); | |
1727 | FDC_WRITE (FDCREG_TRACK, 0xff00); | |
1728 | FDC_WRITE( FDCREG_CMD, FDCCMD_RESTORE | FDCCMDADD_H | FDCSTEP_6 ); | |
1729 | ||
1730 | timeout = jiffies + 2*HZ+HZ/2; | |
1731 | while (time_before(jiffies, timeout)) | |
1732 | if (!(mfp.par_dt_reg & 0x20)) | |
1733 | break; | |
1734 | ||
1735 | status = FDC_READ( FDCREG_STATUS ); | |
1736 | ok = (status & FDCSTAT_TR00) != 0; | |
1737 | ||
1738 | /* force interrupt to abort restore operation (FDC would try | |
1739 | * about 50 seconds!) */ | |
1740 | FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); | |
1741 | udelay(500); | |
1742 | status = FDC_READ( FDCREG_STATUS ); | |
1743 | udelay(20); | |
1744 | ||
1745 | if (ok) { | |
1746 | /* dummy seek command to make WP bit accessible */ | |
1747 | FDC_WRITE( FDCREG_DATA, 0 ); | |
1748 | FDC_WRITE( FDCREG_CMD, FDCCMD_SEEK ); | |
1749 | while( mfp.par_dt_reg & 0x20 ) | |
1750 | ; | |
1751 | status = FDC_READ( FDCREG_STATUS ); | |
1752 | } | |
1753 | ||
1754 | atari_turnon_irq( IRQ_MFP_FDC ); | |
1755 | return( ok ); | |
1756 | } | |
1757 | ||
1758 | ||
1759 | /* Look how many and which kind of drives are connected. If there are | |
1760 | * floppies, additionally start the disk-change and motor-off timers. | |
1761 | */ | |
1762 | ||
1763 | static void __init config_types( void ) | |
1764 | { | |
1765 | int drive, cnt = 0; | |
1766 | ||
1767 | /* for probing drives, set the FDC speed to 8 MHz */ | |
1768 | if (ATARIHW_PRESENT(FDCSPEED)) | |
1769 | dma_wd.fdc_speed = 0; | |
1770 | ||
1771 | printk(KERN_INFO "Probing floppy drive(s):\n"); | |
1772 | for( drive = 0; drive < FD_MAX_UNITS; drive++ ) { | |
1773 | fd_probe( drive ); | |
1774 | if (UD.connected) { | |
1775 | printk(KERN_INFO "fd%d\n", drive); | |
1776 | ++cnt; | |
1777 | } | |
1778 | } | |
1779 | ||
1780 | if (FDC_READ( FDCREG_STATUS ) & FDCSTAT_BUSY) { | |
1781 | /* If FDC is still busy from probing, give it another FORCI | |
1782 | * command to abort the operation. If this isn't done, the FDC | |
1783 | * will interrupt later and its IRQ line stays low, because | |
1784 | * the status register isn't read. And this will block any | |
1785 | * interrupts on this IRQ line :-( | |
1786 | */ | |
1787 | FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); | |
1788 | udelay(500); | |
1789 | FDC_READ( FDCREG_STATUS ); | |
1790 | udelay(20); | |
1791 | } | |
1792 | ||
1793 | if (cnt > 0) { | |
1794 | start_motor_off_timer(); | |
1795 | if (cnt == 1) fd_select_drive( 0 ); | |
1796 | start_check_change_timer(); | |
1797 | } | |
1798 | } | |
1799 | ||
1800 | /* | |
1801 | * floppy_open check for aliasing (/dev/fd0 can be the same as | |
1802 | * /dev/PS0 etc), and disallows simultaneous access to the same | |
1803 | * drive with different device numbers. | |
1804 | */ | |
1805 | ||
1806 | static int floppy_open( struct inode *inode, struct file *filp ) | |
1807 | { | |
1808 | struct atari_floppy_struct *p = inode->i_bdev->bd_disk->private_data; | |
1809 | int type = iminor(inode) >> 2; | |
1810 | ||
1811 | DPRINT(("fd_open: type=%d\n",type)); | |
1812 | if (p->ref && p->type != type) | |
1813 | return -EBUSY; | |
1814 | ||
1815 | if (p->ref == -1 || (p->ref && filp->f_flags & O_EXCL)) | |
1816 | return -EBUSY; | |
1817 | ||
1818 | if (filp->f_flags & O_EXCL) | |
1819 | p->ref = -1; | |
1820 | else | |
1821 | p->ref++; | |
1822 | ||
1823 | p->type = type; | |
1824 | ||
1825 | if (filp->f_flags & O_NDELAY) | |
1826 | return 0; | |
1827 | ||
1828 | if (filp->f_mode & 3) { | |
1829 | check_disk_change(inode->i_bdev); | |
1830 | if (filp->f_mode & 2) { | |
1831 | if (p->wpstat) { | |
1832 | if (p->ref < 0) | |
1833 | p->ref = 0; | |
1834 | else | |
1835 | p->ref--; | |
1836 | floppy_release(inode, filp); | |
1837 | return -EROFS; | |
1838 | } | |
1839 | } | |
1840 | } | |
1841 | return 0; | |
1842 | } | |
1843 | ||
1844 | ||
1845 | static int floppy_release( struct inode * inode, struct file * filp ) | |
1846 | { | |
1847 | struct atari_floppy_struct *p = inode->i_bdev->bd_disk->private_data; | |
1848 | if (p->ref < 0) | |
1849 | p->ref = 0; | |
1850 | else if (!p->ref--) { | |
1851 | printk(KERN_ERR "floppy_release with fd_ref == 0"); | |
1852 | p->ref = 0; | |
1853 | } | |
1854 | return 0; | |
1855 | } | |
1856 | ||
1857 | static struct block_device_operations floppy_fops = { | |
1858 | .owner = THIS_MODULE, | |
1859 | .open = floppy_open, | |
1860 | .release = floppy_release, | |
1861 | .ioctl = fd_ioctl, | |
1862 | .media_changed = check_floppy_change, | |
1863 | .revalidate_disk= floppy_revalidate, | |
1864 | }; | |
1865 | ||
1866 | static struct kobject *floppy_find(dev_t dev, int *part, void *data) | |
1867 | { | |
1868 | int drive = *part & 3; | |
1869 | int type = *part >> 2; | |
1870 | if (drive >= FD_MAX_UNITS || type > NUM_DISK_MINORS) | |
1871 | return NULL; | |
1872 | *part = 0; | |
1873 | return get_disk(unit[drive].disk); | |
1874 | } | |
1875 | ||
1876 | static int __init atari_floppy_init (void) | |
1877 | { | |
1878 | int i; | |
1879 | ||
1880 | if (!MACH_IS_ATARI) | |
1881 | /* Amiga, Mac, ... don't have Atari-compatible floppy :-) */ | |
1882 | return -ENXIO; | |
1883 | ||
1884 | if (MACH_IS_HADES) | |
1885 | /* Hades doesn't have Atari-compatible floppy */ | |
1886 | return -ENXIO; | |
1887 | ||
1888 | if (register_blkdev(FLOPPY_MAJOR,"fd")) | |
1889 | return -EBUSY; | |
1890 | ||
1891 | for (i = 0; i < FD_MAX_UNITS; i++) { | |
1892 | unit[i].disk = alloc_disk(1); | |
1893 | if (!unit[i].disk) | |
1894 | goto Enomem; | |
1895 | } | |
1896 | ||
1897 | if (UseTrackbuffer < 0) | |
1898 | /* not set by user -> use default: for now, we turn | |
1899 | track buffering off for all Medusas, though it | |
1900 | could be used with ones that have a counter | |
1901 | card. But the test is too hard :-( */ | |
1902 | UseTrackbuffer = !MACH_IS_MEDUSA; | |
1903 | ||
1904 | /* initialize variables */ | |
1905 | SelectedDrive = -1; | |
1906 | BufferDrive = -1; | |
1907 | ||
1908 | DMABuffer = atari_stram_alloc(BUFFER_SIZE+512, "ataflop"); | |
1909 | if (!DMABuffer) { | |
1910 | printk(KERN_ERR "atari_floppy_init: cannot get dma buffer\n"); | |
1911 | goto Enomem; | |
1912 | } | |
1913 | TrackBuffer = DMABuffer + 512; | |
1914 | PhysDMABuffer = virt_to_phys(DMABuffer); | |
1915 | PhysTrackBuffer = virt_to_phys(TrackBuffer); | |
1916 | BufferDrive = BufferSide = BufferTrack = -1; | |
1917 | ||
1918 | floppy_queue = blk_init_queue(do_fd_request, &ataflop_lock); | |
1919 | if (!floppy_queue) | |
1920 | goto Enomem; | |
1921 | ||
1922 | for (i = 0; i < FD_MAX_UNITS; i++) { | |
1923 | unit[i].track = -1; | |
1924 | unit[i].flags = 0; | |
1925 | unit[i].disk->major = FLOPPY_MAJOR; | |
1926 | unit[i].disk->first_minor = i; | |
1927 | sprintf(unit[i].disk->disk_name, "fd%d", i); | |
1928 | unit[i].disk->fops = &floppy_fops; | |
1929 | unit[i].disk->private_data = &unit[i]; | |
1930 | unit[i].disk->queue = floppy_queue; | |
1931 | set_capacity(unit[i].disk, MAX_DISK_SIZE * 2); | |
1932 | add_disk(unit[i].disk); | |
1933 | } | |
1934 | ||
1935 | blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE, | |
1936 | floppy_find, NULL, NULL); | |
1937 | ||
1938 | printk(KERN_INFO "Atari floppy driver: max. %cD, %strack buffering\n", | |
1939 | DriveType == 0 ? 'D' : DriveType == 1 ? 'H' : 'E', | |
1940 | UseTrackbuffer ? "" : "no "); | |
1941 | config_types(); | |
1942 | ||
1943 | return 0; | |
1944 | Enomem: | |
1945 | while (i--) | |
1946 | put_disk(unit[i].disk); | |
1947 | if (floppy_queue) | |
1948 | blk_cleanup_queue(floppy_queue); | |
1949 | unregister_blkdev(FLOPPY_MAJOR, "fd"); | |
1950 | return -ENOMEM; | |
1951 | } | |
1952 | ||
1953 | ||
1954 | void __init atari_floppy_setup( char *str, int *ints ) | |
1955 | { | |
1956 | int i; | |
1957 | ||
1958 | if (ints[0] < 1) { | |
1959 | printk(KERN_ERR "ataflop_setup: no arguments!\n" ); | |
1960 | return; | |
1961 | } | |
1962 | else if (ints[0] > 2+FD_MAX_UNITS) { | |
1963 | printk(KERN_ERR "ataflop_setup: too many arguments\n" ); | |
1964 | } | |
1965 | ||
1966 | if (ints[1] < 0 || ints[1] > 2) | |
1967 | printk(KERN_ERR "ataflop_setup: bad drive type\n" ); | |
1968 | else | |
1969 | DriveType = ints[1]; | |
1970 | ||
1971 | if (ints[0] >= 2) | |
1972 | UseTrackbuffer = (ints[2] > 0); | |
1973 | ||
1974 | for( i = 3; i <= ints[0] && i-3 < FD_MAX_UNITS; ++i ) { | |
1975 | if (ints[i] != 2 && ints[i] != 3 && ints[i] != 6 && ints[i] != 12) | |
1976 | printk(KERN_ERR "ataflop_setup: bad steprate\n" ); | |
1977 | else | |
1978 | UserSteprate[i-3] = ints[i]; | |
1979 | } | |
1980 | } | |
1981 | ||
1982 | static void atari_floppy_exit(void) | |
1983 | { | |
1984 | int i; | |
1985 | blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); | |
1986 | for (i = 0; i < FD_MAX_UNITS; i++) { | |
1987 | del_gendisk(unit[i].disk); | |
1988 | put_disk(unit[i].disk); | |
1989 | } | |
1990 | unregister_blkdev(FLOPPY_MAJOR, "fd"); | |
1991 | ||
1992 | blk_cleanup_queue(floppy_queue); | |
1993 | del_timer_sync(&fd_timer); | |
1994 | atari_stram_free( DMABuffer ); | |
1995 | } | |
1996 | ||
1997 | module_init(atari_floppy_init) | |
1998 | module_exit(atari_floppy_exit) | |
1999 | ||
2000 | MODULE_LICENSE("GPL"); |