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 | ||
374 | static struct timer_list motor_off_timer = | |
375 | TIMER_INITIALIZER(fd_motor_off_timer, 0, 0); | |
376 | static struct timer_list readtrack_timer = | |
377 | TIMER_INITIALIZER(fd_readtrack_check, 0, 0); | |
378 | ||
379 | static struct timer_list timeout_timer = | |
380 | TIMER_INITIALIZER(fd_times_out, 0, 0); | |
381 | ||
382 | static struct timer_list fd_timer = | |
383 | TIMER_INITIALIZER(check_change, 0, 0); | |
384 | ||
385 | static inline void start_motor_off_timer(void) | |
386 | { | |
387 | mod_timer(&motor_off_timer, jiffies + FD_MOTOR_OFF_DELAY); | |
388 | MotorOffTrys = 0; | |
389 | } | |
390 | ||
391 | static inline void start_check_change_timer( void ) | |
392 | { | |
393 | mod_timer(&fd_timer, jiffies + CHECK_CHANGE_DELAY); | |
394 | } | |
395 | ||
396 | static inline void start_timeout(void) | |
397 | { | |
398 | mod_timer(&timeout_timer, jiffies + FLOPPY_TIMEOUT); | |
399 | } | |
400 | ||
401 | static inline void stop_timeout(void) | |
402 | { | |
403 | del_timer(&timeout_timer); | |
404 | } | |
405 | ||
406 | /* Select the side to use. */ | |
407 | ||
408 | static void fd_select_side( int side ) | |
409 | { | |
410 | unsigned long flags; | |
411 | ||
412 | /* protect against various other ints mucking around with the PSG */ | |
413 | local_irq_save(flags); | |
414 | ||
415 | sound_ym.rd_data_reg_sel = 14; /* Select PSG Port A */ | |
416 | sound_ym.wd_data = (side == 0) ? sound_ym.rd_data_reg_sel | 0x01 : | |
417 | sound_ym.rd_data_reg_sel & 0xfe; | |
418 | ||
419 | local_irq_restore(flags); | |
420 | } | |
421 | ||
422 | ||
423 | /* Select a drive, update the FDC's track register and set the correct | |
424 | * clock speed for this disk's type. | |
425 | */ | |
426 | ||
427 | static void fd_select_drive( int drive ) | |
428 | { | |
429 | unsigned long flags; | |
430 | unsigned char tmp; | |
431 | ||
432 | if (drive == SelectedDrive) | |
433 | return; | |
434 | ||
435 | /* protect against various other ints mucking around with the PSG */ | |
436 | local_irq_save(flags); | |
437 | sound_ym.rd_data_reg_sel = 14; /* Select PSG Port A */ | |
438 | tmp = sound_ym.rd_data_reg_sel; | |
439 | sound_ym.wd_data = (tmp | DSKDRVNONE) & ~(drive == 0 ? DSKDRV0 : DSKDRV1); | |
440 | atari_dont_touch_floppy_select = 1; | |
441 | local_irq_restore(flags); | |
442 | ||
443 | /* restore track register to saved value */ | |
444 | FDC_WRITE( FDCREG_TRACK, UD.track ); | |
445 | udelay(25); | |
446 | ||
447 | /* select 8/16 MHz */ | |
448 | if (UDT) | |
449 | if (ATARIHW_PRESENT(FDCSPEED)) | |
450 | dma_wd.fdc_speed = UDT->fdc_speed; | |
451 | ||
452 | SelectedDrive = drive; | |
453 | } | |
454 | ||
455 | ||
456 | /* Deselect both drives. */ | |
457 | ||
458 | static void fd_deselect( void ) | |
459 | { | |
460 | unsigned long flags; | |
461 | ||
462 | /* protect against various other ints mucking around with the PSG */ | |
463 | local_irq_save(flags); | |
464 | atari_dont_touch_floppy_select = 0; | |
465 | sound_ym.rd_data_reg_sel=14; /* Select PSG Port A */ | |
466 | sound_ym.wd_data = (sound_ym.rd_data_reg_sel | | |
467 | (MACH_IS_FALCON ? 3 : 7)); /* no drives selected */ | |
468 | /* On Falcon, the drive B select line is used on the printer port, so | |
469 | * leave it alone... */ | |
470 | SelectedDrive = -1; | |
471 | local_irq_restore(flags); | |
472 | } | |
473 | ||
474 | ||
475 | /* This timer function deselects the drives when the FDC switched the | |
476 | * motor off. The deselection cannot happen earlier because the FDC | |
477 | * counts the index signals, which arrive only if one drive is selected. | |
478 | */ | |
479 | ||
480 | static void fd_motor_off_timer( unsigned long dummy ) | |
481 | { | |
482 | unsigned char status; | |
483 | ||
484 | if (SelectedDrive < 0) | |
485 | /* no drive selected, needn't deselect anyone */ | |
486 | return; | |
487 | ||
488 | if (stdma_islocked()) | |
489 | goto retry; | |
490 | ||
491 | status = FDC_READ( FDCREG_STATUS ); | |
492 | ||
493 | if (!(status & 0x80)) { | |
494 | /* motor already turned off by FDC -> deselect drives */ | |
495 | MotorOn = 0; | |
496 | fd_deselect(); | |
497 | return; | |
498 | } | |
499 | /* not yet off, try again */ | |
500 | ||
501 | retry: | |
502 | /* Test again later; if tested too often, it seems there is no disk | |
503 | * in the drive and the FDC will leave the motor on forever (or, | |
504 | * at least until a disk is inserted). So we'll test only twice | |
505 | * per second from then on... | |
506 | */ | |
507 | mod_timer(&motor_off_timer, | |
508 | jiffies + (MotorOffTrys++ < FD_MOTOR_OFF_MAXTRY ? HZ/20 : HZ/2)); | |
509 | } | |
510 | ||
511 | ||
512 | /* This function is repeatedly called to detect disk changes (as good | |
513 | * as possible) and keep track of the current state of the write protection. | |
514 | */ | |
515 | ||
516 | static void check_change( unsigned long dummy ) | |
517 | { | |
518 | static int drive = 0; | |
519 | ||
520 | unsigned long flags; | |
521 | unsigned char old_porta; | |
522 | int stat; | |
523 | ||
524 | if (++drive > 1 || !UD.connected) | |
525 | drive = 0; | |
526 | ||
527 | /* protect against various other ints mucking around with the PSG */ | |
528 | local_irq_save(flags); | |
529 | ||
530 | if (!stdma_islocked()) { | |
531 | sound_ym.rd_data_reg_sel = 14; | |
532 | old_porta = sound_ym.rd_data_reg_sel; | |
533 | sound_ym.wd_data = (old_porta | DSKDRVNONE) & | |
534 | ~(drive == 0 ? DSKDRV0 : DSKDRV1); | |
535 | stat = !!(FDC_READ( FDCREG_STATUS ) & FDCSTAT_WPROT); | |
536 | sound_ym.wd_data = old_porta; | |
537 | ||
538 | if (stat != UD.wpstat) { | |
539 | DPRINT(( "wpstat[%d] = %d\n", drive, stat )); | |
540 | UD.wpstat = stat; | |
541 | set_bit (drive, &changed_floppies); | |
542 | } | |
543 | } | |
544 | local_irq_restore(flags); | |
545 | ||
546 | start_check_change_timer(); | |
547 | } | |
548 | ||
549 | ||
550 | /* Handling of the Head Settling Flag: This flag should be set after each | |
551 | * seek operation, because we don't use seeks with verify. | |
552 | */ | |
553 | ||
554 | static inline void set_head_settle_flag(void) | |
555 | { | |
556 | HeadSettleFlag = FDCCMDADD_E; | |
557 | } | |
558 | ||
559 | static inline int get_head_settle_flag(void) | |
560 | { | |
561 | int tmp = HeadSettleFlag; | |
562 | HeadSettleFlag = 0; | |
563 | return( tmp ); | |
564 | } | |
565 | ||
566 | static inline void copy_buffer(void *from, void *to) | |
567 | { | |
568 | ulong *p1 = (ulong *)from, *p2 = (ulong *)to; | |
569 | int cnt; | |
570 | ||
571 | for (cnt = 512/4; cnt; cnt--) | |
572 | *p2++ = *p1++; | |
573 | } | |
574 | ||
575 | ||
576 | ||
577 | ||
578 | /* General Interrupt Handling */ | |
579 | ||
580 | static void (*FloppyIRQHandler)( int status ) = NULL; | |
581 | ||
582 | static irqreturn_t floppy_irq (int irq, void *dummy, struct pt_regs *fp) | |
583 | { | |
584 | unsigned char status; | |
585 | void (*handler)( int ); | |
586 | ||
587 | handler = xchg(&FloppyIRQHandler, NULL); | |
588 | ||
589 | if (handler) { | |
590 | nop(); | |
591 | status = FDC_READ( FDCREG_STATUS ); | |
592 | DPRINT(("FDC irq, status = %02x handler = %08lx\n",status,(unsigned long)handler)); | |
593 | handler( status ); | |
594 | } | |
595 | else { | |
596 | DPRINT(("FDC irq, no handler\n")); | |
597 | } | |
598 | return IRQ_HANDLED; | |
599 | } | |
600 | ||
601 | ||
602 | /* Error handling: If some error happened, retry some times, then | |
603 | * recalibrate, then try again, and fail after MAX_ERRORS. | |
604 | */ | |
605 | ||
606 | static void fd_error( void ) | |
607 | { | |
608 | if (IsFormatting) { | |
609 | IsFormatting = 0; | |
610 | FormatError = 1; | |
611 | wake_up( &format_wait ); | |
612 | return; | |
613 | } | |
614 | ||
615 | if (!CURRENT) | |
616 | return; | |
617 | ||
618 | CURRENT->errors++; | |
619 | if (CURRENT->errors >= MAX_ERRORS) { | |
620 | printk(KERN_ERR "fd%d: too many errors.\n", SelectedDrive ); | |
621 | end_request(CURRENT, 0); | |
622 | } | |
623 | else if (CURRENT->errors == RECALIBRATE_ERRORS) { | |
624 | printk(KERN_WARNING "fd%d: recalibrating\n", SelectedDrive ); | |
625 | if (SelectedDrive != -1) | |
626 | SUD.track = -1; | |
627 | } | |
628 | redo_fd_request(); | |
629 | } | |
630 | ||
631 | ||
632 | ||
633 | #define SET_IRQ_HANDLER(proc) do { FloppyIRQHandler = (proc); } while(0) | |
634 | ||
635 | ||
636 | /* ---------- Formatting ---------- */ | |
637 | ||
638 | #define FILL(n,val) \ | |
639 | do { \ | |
640 | memset( p, val, n ); \ | |
641 | p += n; \ | |
642 | } while(0) | |
643 | ||
644 | static int do_format(int drive, int type, struct atari_format_descr *desc) | |
645 | { | |
646 | unsigned char *p; | |
647 | int sect, nsect; | |
648 | unsigned long flags; | |
649 | ||
650 | DPRINT(("do_format( dr=%d tr=%d he=%d offs=%d )\n", | |
651 | drive, desc->track, desc->head, desc->sect_offset )); | |
652 | ||
653 | local_irq_save(flags); | |
654 | while( fdc_busy ) sleep_on( &fdc_wait ); | |
655 | fdc_busy = 1; | |
656 | stdma_lock(floppy_irq, NULL); | |
657 | atari_turnon_irq( IRQ_MFP_FDC ); /* should be already, just to be sure */ | |
658 | local_irq_restore(flags); | |
659 | ||
660 | if (type) { | |
661 | if (--type >= NUM_DISK_MINORS || | |
662 | minor2disktype[type].drive_types > DriveType) { | |
663 | redo_fd_request(); | |
664 | return -EINVAL; | |
665 | } | |
666 | type = minor2disktype[type].index; | |
667 | UDT = &disk_type[type]; | |
668 | } | |
669 | ||
670 | if (!UDT || desc->track >= UDT->blocks/UDT->spt/2 || desc->head >= 2) { | |
671 | redo_fd_request(); | |
672 | return -EINVAL; | |
673 | } | |
674 | ||
675 | nsect = UDT->spt; | |
676 | p = TrackBuffer; | |
677 | /* The track buffer is used for the raw track data, so its | |
678 | contents become invalid! */ | |
679 | BufferDrive = -1; | |
680 | /* stop deselect timer */ | |
681 | del_timer( &motor_off_timer ); | |
682 | ||
683 | FILL( 60 * (nsect / 9), 0x4e ); | |
684 | for( sect = 0; sect < nsect; ++sect ) { | |
685 | FILL( 12, 0 ); | |
686 | FILL( 3, 0xf5 ); | |
687 | *p++ = 0xfe; | |
688 | *p++ = desc->track; | |
689 | *p++ = desc->head; | |
690 | *p++ = (nsect + sect - desc->sect_offset) % nsect + 1; | |
691 | *p++ = 2; | |
692 | *p++ = 0xf7; | |
693 | FILL( 22, 0x4e ); | |
694 | FILL( 12, 0 ); | |
695 | FILL( 3, 0xf5 ); | |
696 | *p++ = 0xfb; | |
697 | FILL( 512, 0xe5 ); | |
698 | *p++ = 0xf7; | |
699 | FILL( 40, 0x4e ); | |
700 | } | |
701 | FILL( TrackBuffer+BUFFER_SIZE-p, 0x4e ); | |
702 | ||
703 | IsFormatting = 1; | |
704 | FormatError = 0; | |
705 | ReqTrack = desc->track; | |
706 | ReqSide = desc->head; | |
707 | do_fd_action( drive ); | |
708 | ||
709 | sleep_on( &format_wait ); | |
710 | ||
711 | redo_fd_request(); | |
712 | return( FormatError ? -EIO : 0 ); | |
713 | } | |
714 | ||
715 | ||
716 | /* do_fd_action() is the general procedure for a fd request: All | |
717 | * required parameter settings (drive select, side select, track | |
718 | * position) are checked and set if needed. For each of these | |
719 | * parameters and the actual reading or writing exist two functions: | |
720 | * one that starts the setting (or skips it if possible) and one | |
721 | * callback for the "done" interrupt. Each done func calls the next | |
722 | * set function to propagate the request down to fd_rwsec_done(). | |
723 | */ | |
724 | ||
725 | static void do_fd_action( int drive ) | |
726 | { | |
727 | DPRINT(("do_fd_action\n")); | |
728 | ||
729 | if (UseTrackbuffer && !IsFormatting) { | |
730 | repeat: | |
731 | if (IS_BUFFERED( drive, ReqSide, ReqTrack )) { | |
732 | if (ReqCmd == READ) { | |
733 | copy_buffer( SECTOR_BUFFER(ReqSector), ReqData ); | |
734 | if (++ReqCnt < CURRENT->current_nr_sectors) { | |
735 | /* read next sector */ | |
736 | setup_req_params( drive ); | |
737 | goto repeat; | |
738 | } | |
739 | else { | |
740 | /* all sectors finished */ | |
741 | CURRENT->nr_sectors -= CURRENT->current_nr_sectors; | |
742 | CURRENT->sector += CURRENT->current_nr_sectors; | |
743 | end_request(CURRENT, 1); | |
744 | redo_fd_request(); | |
745 | return; | |
746 | } | |
747 | } | |
748 | else { | |
749 | /* cmd == WRITE, pay attention to track buffer | |
750 | * consistency! */ | |
751 | copy_buffer( ReqData, SECTOR_BUFFER(ReqSector) ); | |
752 | } | |
753 | } | |
754 | } | |
755 | ||
756 | if (SelectedDrive != drive) | |
757 | fd_select_drive( drive ); | |
758 | ||
759 | if (UD.track == -1) | |
760 | fd_calibrate(); | |
761 | else if (UD.track != ReqTrack << UDT->stretch) | |
762 | fd_seek(); | |
763 | else if (IsFormatting) | |
764 | fd_writetrack(); | |
765 | else | |
766 | fd_rwsec(); | |
767 | } | |
768 | ||
769 | ||
770 | /* Seek to track 0 if the current track is unknown */ | |
771 | ||
772 | static void fd_calibrate( void ) | |
773 | { | |
774 | if (SUD.track >= 0) { | |
775 | fd_calibrate_done( 0 ); | |
776 | return; | |
777 | } | |
778 | ||
779 | if (ATARIHW_PRESENT(FDCSPEED)) | |
780 | dma_wd.fdc_speed = 0; /* always seek with 8 Mhz */; | |
781 | DPRINT(("fd_calibrate\n")); | |
782 | SET_IRQ_HANDLER( fd_calibrate_done ); | |
783 | /* we can't verify, since the speed may be incorrect */ | |
784 | FDC_WRITE( FDCREG_CMD, FDCCMD_RESTORE | SUD.steprate ); | |
785 | ||
786 | NeedSeek = 1; | |
787 | MotorOn = 1; | |
788 | start_timeout(); | |
789 | /* wait for IRQ */ | |
790 | } | |
791 | ||
792 | ||
793 | static void fd_calibrate_done( int status ) | |
794 | { | |
795 | DPRINT(("fd_calibrate_done()\n")); | |
796 | stop_timeout(); | |
797 | ||
798 | /* set the correct speed now */ | |
799 | if (ATARIHW_PRESENT(FDCSPEED)) | |
800 | dma_wd.fdc_speed = SUDT->fdc_speed; | |
801 | if (status & FDCSTAT_RECNF) { | |
802 | printk(KERN_ERR "fd%d: restore failed\n", SelectedDrive ); | |
803 | fd_error(); | |
804 | } | |
805 | else { | |
806 | SUD.track = 0; | |
807 | fd_seek(); | |
808 | } | |
809 | } | |
810 | ||
811 | ||
812 | /* Seek the drive to the requested track. The drive must have been | |
813 | * calibrated at some point before this. | |
814 | */ | |
815 | ||
816 | static void fd_seek( void ) | |
817 | { | |
818 | if (SUD.track == ReqTrack << SUDT->stretch) { | |
819 | fd_seek_done( 0 ); | |
820 | return; | |
821 | } | |
822 | ||
823 | if (ATARIHW_PRESENT(FDCSPEED)) { | |
824 | dma_wd.fdc_speed = 0; /* always seek witch 8 Mhz */ | |
825 | MFPDELAY(); | |
826 | } | |
827 | ||
828 | DPRINT(("fd_seek() to track %d\n",ReqTrack)); | |
829 | FDC_WRITE( FDCREG_DATA, ReqTrack << SUDT->stretch); | |
830 | udelay(25); | |
831 | SET_IRQ_HANDLER( fd_seek_done ); | |
832 | FDC_WRITE( FDCREG_CMD, FDCCMD_SEEK | SUD.steprate ); | |
833 | ||
834 | MotorOn = 1; | |
835 | set_head_settle_flag(); | |
836 | start_timeout(); | |
837 | /* wait for IRQ */ | |
838 | } | |
839 | ||
840 | ||
841 | static void fd_seek_done( int status ) | |
842 | { | |
843 | DPRINT(("fd_seek_done()\n")); | |
844 | stop_timeout(); | |
845 | ||
846 | /* set the correct speed */ | |
847 | if (ATARIHW_PRESENT(FDCSPEED)) | |
848 | dma_wd.fdc_speed = SUDT->fdc_speed; | |
849 | if (status & FDCSTAT_RECNF) { | |
850 | printk(KERN_ERR "fd%d: seek error (to track %d)\n", | |
851 | SelectedDrive, ReqTrack ); | |
852 | /* we don't know exactly which track we are on now! */ | |
853 | SUD.track = -1; | |
854 | fd_error(); | |
855 | } | |
856 | else { | |
857 | SUD.track = ReqTrack << SUDT->stretch; | |
858 | NeedSeek = 0; | |
859 | if (IsFormatting) | |
860 | fd_writetrack(); | |
861 | else | |
862 | fd_rwsec(); | |
863 | } | |
864 | } | |
865 | ||
866 | ||
867 | /* This does the actual reading/writing after positioning the head | |
868 | * over the correct track. | |
869 | */ | |
870 | ||
871 | static int MultReadInProgress = 0; | |
872 | ||
873 | ||
874 | static void fd_rwsec( void ) | |
875 | { | |
876 | unsigned long paddr, flags; | |
877 | unsigned int rwflag, old_motoron; | |
878 | unsigned int track; | |
879 | ||
880 | DPRINT(("fd_rwsec(), Sec=%d, Access=%c\n",ReqSector, ReqCmd == WRITE ? 'w' : 'r' )); | |
881 | if (ReqCmd == WRITE) { | |
882 | if (ATARIHW_PRESENT(EXTD_DMA)) { | |
883 | paddr = virt_to_phys(ReqData); | |
884 | } | |
885 | else { | |
886 | copy_buffer( ReqData, DMABuffer ); | |
887 | paddr = PhysDMABuffer; | |
888 | } | |
889 | dma_cache_maintenance( paddr, 512, 1 ); | |
890 | rwflag = 0x100; | |
891 | } | |
892 | else { | |
893 | if (read_track) | |
894 | paddr = PhysTrackBuffer; | |
895 | else | |
896 | paddr = ATARIHW_PRESENT(EXTD_DMA) ? | |
897 | virt_to_phys(ReqData) : PhysDMABuffer; | |
898 | rwflag = 0; | |
899 | } | |
900 | ||
901 | fd_select_side( ReqSide ); | |
902 | ||
903 | /* Start sector of this operation */ | |
904 | FDC_WRITE( FDCREG_SECTOR, read_track ? 1 : ReqSector ); | |
905 | MFPDELAY(); | |
906 | /* Cheat for track if stretch != 0 */ | |
907 | if (SUDT->stretch) { | |
908 | track = FDC_READ( FDCREG_TRACK); | |
909 | MFPDELAY(); | |
910 | FDC_WRITE( FDCREG_TRACK, track >> SUDT->stretch); | |
911 | } | |
912 | udelay(25); | |
913 | ||
914 | /* Setup DMA */ | |
915 | local_irq_save(flags); | |
916 | dma_wd.dma_lo = (unsigned char)paddr; | |
917 | MFPDELAY(); | |
918 | paddr >>= 8; | |
919 | dma_wd.dma_md = (unsigned char)paddr; | |
920 | MFPDELAY(); | |
921 | paddr >>= 8; | |
922 | if (ATARIHW_PRESENT(EXTD_DMA)) | |
923 | st_dma_ext_dmahi = (unsigned short)paddr; | |
924 | else | |
925 | dma_wd.dma_hi = (unsigned char)paddr; | |
926 | MFPDELAY(); | |
927 | local_irq_restore(flags); | |
928 | ||
929 | /* Clear FIFO and switch DMA to correct mode */ | |
930 | dma_wd.dma_mode_status = 0x90 | rwflag; | |
931 | MFPDELAY(); | |
932 | dma_wd.dma_mode_status = 0x90 | (rwflag ^ 0x100); | |
933 | MFPDELAY(); | |
934 | dma_wd.dma_mode_status = 0x90 | rwflag; | |
935 | MFPDELAY(); | |
936 | ||
937 | /* How many sectors for DMA */ | |
938 | dma_wd.fdc_acces_seccount = read_track ? SUDT->spt : 1; | |
939 | ||
940 | udelay(25); | |
941 | ||
942 | /* Start operation */ | |
943 | dma_wd.dma_mode_status = FDCSELREG_STP | rwflag; | |
944 | udelay(25); | |
945 | SET_IRQ_HANDLER( fd_rwsec_done ); | |
946 | dma_wd.fdc_acces_seccount = | |
947 | (get_head_settle_flag() | | |
948 | (rwflag ? FDCCMD_WRSEC : (FDCCMD_RDSEC | (read_track ? FDCCMDADD_M : 0)))); | |
949 | ||
950 | old_motoron = MotorOn; | |
951 | MotorOn = 1; | |
952 | NeedSeek = 1; | |
953 | /* wait for interrupt */ | |
954 | ||
955 | if (read_track) { | |
956 | /* If reading a whole track, wait about one disk rotation and | |
957 | * then check if all sectors are read. The FDC will even | |
958 | * search for the first non-existent sector and need 1 sec to | |
959 | * recognise that it isn't present :-( | |
960 | */ | |
961 | MultReadInProgress = 1; | |
962 | mod_timer(&readtrack_timer, | |
963 | /* 1 rot. + 5 rot.s if motor was off */ | |
964 | jiffies + HZ/5 + (old_motoron ? 0 : HZ)); | |
965 | } | |
966 | start_timeout(); | |
967 | } | |
968 | ||
969 | ||
970 | static void fd_readtrack_check( unsigned long dummy ) | |
971 | { | |
972 | unsigned long flags, addr, addr2; | |
973 | ||
974 | local_irq_save(flags); | |
975 | ||
976 | if (!MultReadInProgress) { | |
977 | /* This prevents a race condition that could arise if the | |
978 | * interrupt is triggered while the calling of this timer | |
979 | * callback function takes place. The IRQ function then has | |
980 | * already cleared 'MultReadInProgress' when flow of control | |
981 | * gets here. | |
982 | */ | |
983 | local_irq_restore(flags); | |
984 | return; | |
985 | } | |
986 | ||
987 | /* get the current DMA address */ | |
988 | /* ++ f.a. read twice to avoid being fooled by switcher */ | |
989 | addr = 0; | |
990 | do { | |
991 | addr2 = addr; | |
992 | addr = dma_wd.dma_lo & 0xff; | |
993 | MFPDELAY(); | |
994 | addr |= (dma_wd.dma_md & 0xff) << 8; | |
995 | MFPDELAY(); | |
996 | if (ATARIHW_PRESENT( EXTD_DMA )) | |
997 | addr |= (st_dma_ext_dmahi & 0xffff) << 16; | |
998 | else | |
999 | addr |= (dma_wd.dma_hi & 0xff) << 16; | |
1000 | MFPDELAY(); | |
1001 | } while(addr != addr2); | |
1002 | ||
1003 | if (addr >= PhysTrackBuffer + SUDT->spt*512) { | |
1004 | /* already read enough data, force an FDC interrupt to stop | |
1005 | * the read operation | |
1006 | */ | |
1007 | SET_IRQ_HANDLER( NULL ); | |
1008 | MultReadInProgress = 0; | |
1009 | local_irq_restore(flags); | |
1010 | DPRINT(("fd_readtrack_check(): done\n")); | |
1011 | FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); | |
1012 | udelay(25); | |
1013 | ||
1014 | /* No error until now -- the FDC would have interrupted | |
1015 | * otherwise! | |
1016 | */ | |
1017 | fd_rwsec_done1(0); | |
1018 | } | |
1019 | else { | |
1020 | /* not yet finished, wait another tenth rotation */ | |
1021 | local_irq_restore(flags); | |
1022 | DPRINT(("fd_readtrack_check(): not yet finished\n")); | |
1023 | mod_timer(&readtrack_timer, jiffies + HZ/5/10); | |
1024 | } | |
1025 | } | |
1026 | ||
1027 | ||
1028 | static void fd_rwsec_done( int status ) | |
1029 | { | |
1030 | DPRINT(("fd_rwsec_done()\n")); | |
1031 | ||
1032 | if (read_track) { | |
1033 | del_timer(&readtrack_timer); | |
1034 | if (!MultReadInProgress) | |
1035 | return; | |
1036 | MultReadInProgress = 0; | |
1037 | } | |
1038 | fd_rwsec_done1(status); | |
1039 | } | |
1040 | ||
1041 | static void fd_rwsec_done1(int status) | |
1042 | { | |
1043 | unsigned int track; | |
1044 | ||
1045 | stop_timeout(); | |
1046 | ||
1047 | /* Correct the track if stretch != 0 */ | |
1048 | if (SUDT->stretch) { | |
1049 | track = FDC_READ( FDCREG_TRACK); | |
1050 | MFPDELAY(); | |
1051 | FDC_WRITE( FDCREG_TRACK, track << SUDT->stretch); | |
1052 | } | |
1053 | ||
1054 | if (!UseTrackbuffer) { | |
1055 | dma_wd.dma_mode_status = 0x90; | |
1056 | MFPDELAY(); | |
1057 | if (!(dma_wd.dma_mode_status & 0x01)) { | |
1058 | printk(KERN_ERR "fd%d: DMA error\n", SelectedDrive ); | |
1059 | goto err_end; | |
1060 | } | |
1061 | } | |
1062 | MFPDELAY(); | |
1063 | ||
1064 | if (ReqCmd == WRITE && (status & FDCSTAT_WPROT)) { | |
1065 | printk(KERN_NOTICE "fd%d: is write protected\n", SelectedDrive ); | |
1066 | goto err_end; | |
1067 | } | |
1068 | if ((status & FDCSTAT_RECNF) && | |
1069 | /* RECNF is no error after a multiple read when the FDC | |
1070 | searched for a non-existent sector! */ | |
1071 | !(read_track && FDC_READ(FDCREG_SECTOR) > SUDT->spt)) { | |
1072 | if (Probing) { | |
1073 | if (SUDT > disk_type) { | |
1074 | if (SUDT[-1].blocks > ReqBlock) { | |
1075 | /* try another disk type */ | |
1076 | SUDT--; | |
1077 | set_capacity(unit[SelectedDrive].disk, | |
1078 | SUDT->blocks); | |
1079 | } else | |
1080 | Probing = 0; | |
1081 | } | |
1082 | else { | |
1083 | if (SUD.flags & FTD_MSG) | |
1084 | printk(KERN_INFO "fd%d: Auto-detected floppy type %s\n", | |
1085 | SelectedDrive, SUDT->name ); | |
1086 | Probing=0; | |
1087 | } | |
1088 | } else { | |
1089 | /* record not found, but not probing. Maybe stretch wrong ? Restart probing */ | |
1090 | if (SUD.autoprobe) { | |
1091 | SUDT = disk_type + StartDiskType[DriveType]; | |
1092 | set_capacity(unit[SelectedDrive].disk, | |
1093 | SUDT->blocks); | |
1094 | Probing = 1; | |
1095 | } | |
1096 | } | |
1097 | if (Probing) { | |
1098 | if (ATARIHW_PRESENT(FDCSPEED)) { | |
1099 | dma_wd.fdc_speed = SUDT->fdc_speed; | |
1100 | MFPDELAY(); | |
1101 | } | |
1102 | setup_req_params( SelectedDrive ); | |
1103 | BufferDrive = -1; | |
1104 | do_fd_action( SelectedDrive ); | |
1105 | return; | |
1106 | } | |
1107 | ||
1108 | printk(KERN_ERR "fd%d: sector %d not found (side %d, track %d)\n", | |
1109 | SelectedDrive, FDC_READ (FDCREG_SECTOR), ReqSide, ReqTrack ); | |
1110 | goto err_end; | |
1111 | } | |
1112 | if (status & FDCSTAT_CRC) { | |
1113 | printk(KERN_ERR "fd%d: CRC error (side %d, track %d, sector %d)\n", | |
1114 | SelectedDrive, ReqSide, ReqTrack, FDC_READ (FDCREG_SECTOR) ); | |
1115 | goto err_end; | |
1116 | } | |
1117 | if (status & FDCSTAT_LOST) { | |
1118 | printk(KERN_ERR "fd%d: lost data (side %d, track %d, sector %d)\n", | |
1119 | SelectedDrive, ReqSide, ReqTrack, FDC_READ (FDCREG_SECTOR) ); | |
1120 | goto err_end; | |
1121 | } | |
1122 | ||
1123 | Probing = 0; | |
1124 | ||
1125 | if (ReqCmd == READ) { | |
1126 | if (!read_track) { | |
1127 | void *addr; | |
1128 | addr = ATARIHW_PRESENT( EXTD_DMA ) ? ReqData : DMABuffer; | |
1129 | dma_cache_maintenance( virt_to_phys(addr), 512, 0 ); | |
1130 | if (!ATARIHW_PRESENT( EXTD_DMA )) | |
1131 | copy_buffer (addr, ReqData); | |
1132 | } else { | |
1133 | dma_cache_maintenance( PhysTrackBuffer, MaxSectors[DriveType] * 512, 0 ); | |
1134 | BufferDrive = SelectedDrive; | |
1135 | BufferSide = ReqSide; | |
1136 | BufferTrack = ReqTrack; | |
1137 | copy_buffer (SECTOR_BUFFER (ReqSector), ReqData); | |
1138 | } | |
1139 | } | |
1140 | ||
1141 | if (++ReqCnt < CURRENT->current_nr_sectors) { | |
1142 | /* read next sector */ | |
1143 | setup_req_params( SelectedDrive ); | |
1144 | do_fd_action( SelectedDrive ); | |
1145 | } | |
1146 | else { | |
1147 | /* all sectors finished */ | |
1148 | CURRENT->nr_sectors -= CURRENT->current_nr_sectors; | |
1149 | CURRENT->sector += CURRENT->current_nr_sectors; | |
1150 | end_request(CURRENT, 1); | |
1151 | redo_fd_request(); | |
1152 | } | |
1153 | return; | |
1154 | ||
1155 | err_end: | |
1156 | BufferDrive = -1; | |
1157 | fd_error(); | |
1158 | } | |
1159 | ||
1160 | ||
1161 | static void fd_writetrack( void ) | |
1162 | { | |
1163 | unsigned long paddr, flags; | |
1164 | unsigned int track; | |
1165 | ||
1166 | DPRINT(("fd_writetrack() Tr=%d Si=%d\n", ReqTrack, ReqSide )); | |
1167 | ||
1168 | paddr = PhysTrackBuffer; | |
1169 | dma_cache_maintenance( paddr, BUFFER_SIZE, 1 ); | |
1170 | ||
1171 | fd_select_side( ReqSide ); | |
1172 | ||
1173 | /* Cheat for track if stretch != 0 */ | |
1174 | if (SUDT->stretch) { | |
1175 | track = FDC_READ( FDCREG_TRACK); | |
1176 | MFPDELAY(); | |
1177 | FDC_WRITE(FDCREG_TRACK,track >> SUDT->stretch); | |
1178 | } | |
1179 | udelay(40); | |
1180 | ||
1181 | /* Setup DMA */ | |
1182 | local_irq_save(flags); | |
1183 | dma_wd.dma_lo = (unsigned char)paddr; | |
1184 | MFPDELAY(); | |
1185 | paddr >>= 8; | |
1186 | dma_wd.dma_md = (unsigned char)paddr; | |
1187 | MFPDELAY(); | |
1188 | paddr >>= 8; | |
1189 | if (ATARIHW_PRESENT( EXTD_DMA )) | |
1190 | st_dma_ext_dmahi = (unsigned short)paddr; | |
1191 | else | |
1192 | dma_wd.dma_hi = (unsigned char)paddr; | |
1193 | MFPDELAY(); | |
1194 | local_irq_restore(flags); | |
1195 | ||
1196 | /* Clear FIFO and switch DMA to correct mode */ | |
1197 | dma_wd.dma_mode_status = 0x190; | |
1198 | MFPDELAY(); | |
1199 | dma_wd.dma_mode_status = 0x90; | |
1200 | MFPDELAY(); | |
1201 | dma_wd.dma_mode_status = 0x190; | |
1202 | MFPDELAY(); | |
1203 | ||
1204 | /* How many sectors for DMA */ | |
1205 | dma_wd.fdc_acces_seccount = BUFFER_SIZE/512; | |
1206 | udelay(40); | |
1207 | ||
1208 | /* Start operation */ | |
1209 | dma_wd.dma_mode_status = FDCSELREG_STP | 0x100; | |
1210 | udelay(40); | |
1211 | SET_IRQ_HANDLER( fd_writetrack_done ); | |
1212 | dma_wd.fdc_acces_seccount = FDCCMD_WRTRA | get_head_settle_flag(); | |
1213 | ||
1214 | MotorOn = 1; | |
1215 | start_timeout(); | |
1216 | /* wait for interrupt */ | |
1217 | } | |
1218 | ||
1219 | ||
1220 | static void fd_writetrack_done( int status ) | |
1221 | { | |
1222 | DPRINT(("fd_writetrack_done()\n")); | |
1223 | ||
1224 | stop_timeout(); | |
1225 | ||
1226 | if (status & FDCSTAT_WPROT) { | |
1227 | printk(KERN_NOTICE "fd%d: is write protected\n", SelectedDrive ); | |
1228 | goto err_end; | |
1229 | } | |
1230 | if (status & FDCSTAT_LOST) { | |
1231 | printk(KERN_ERR "fd%d: lost data (side %d, track %d)\n", | |
1232 | SelectedDrive, ReqSide, ReqTrack ); | |
1233 | goto err_end; | |
1234 | } | |
1235 | ||
1236 | wake_up( &format_wait ); | |
1237 | return; | |
1238 | ||
1239 | err_end: | |
1240 | fd_error(); | |
1241 | } | |
1242 | ||
1243 | static void fd_times_out( unsigned long dummy ) | |
1244 | { | |
1245 | atari_disable_irq( IRQ_MFP_FDC ); | |
1246 | if (!FloppyIRQHandler) goto end; /* int occurred after timer was fired, but | |
1247 | * before we came here... */ | |
1248 | ||
1249 | SET_IRQ_HANDLER( NULL ); | |
1250 | /* If the timeout occurred while the readtrack_check timer was | |
1251 | * active, we need to cancel it, else bad things will happen */ | |
1252 | if (UseTrackbuffer) | |
1253 | del_timer( &readtrack_timer ); | |
1254 | FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); | |
1255 | udelay( 25 ); | |
1256 | ||
1257 | printk(KERN_ERR "floppy timeout\n" ); | |
1258 | fd_error(); | |
1259 | end: | |
1260 | atari_enable_irq( IRQ_MFP_FDC ); | |
1261 | } | |
1262 | ||
1263 | ||
1264 | /* The (noop) seek operation here is needed to make the WP bit in the | |
1265 | * FDC status register accessible for check_change. If the last disk | |
1266 | * operation would have been a RDSEC, this bit would always read as 0 | |
1267 | * no matter what :-( To save time, the seek goes to the track we're | |
1268 | * already on. | |
1269 | */ | |
1270 | ||
1271 | static void finish_fdc( void ) | |
1272 | { | |
1273 | if (!NeedSeek) { | |
1274 | finish_fdc_done( 0 ); | |
1275 | } | |
1276 | else { | |
1277 | DPRINT(("finish_fdc: dummy seek started\n")); | |
1278 | FDC_WRITE (FDCREG_DATA, SUD.track); | |
1279 | SET_IRQ_HANDLER( finish_fdc_done ); | |
1280 | FDC_WRITE (FDCREG_CMD, FDCCMD_SEEK); | |
1281 | MotorOn = 1; | |
1282 | start_timeout(); | |
1283 | /* we must wait for the IRQ here, because the ST-DMA | |
1284 | is released immediately afterwards and the interrupt | |
1285 | may be delivered to the wrong driver. */ | |
1286 | } | |
1287 | } | |
1288 | ||
1289 | ||
1290 | static void finish_fdc_done( int dummy ) | |
1291 | { | |
1292 | unsigned long flags; | |
1293 | ||
1294 | DPRINT(("finish_fdc_done entered\n")); | |
1295 | stop_timeout(); | |
1296 | NeedSeek = 0; | |
1297 | ||
1298 | if (timer_pending(&fd_timer) && time_before(fd_timer.expires, jiffies + 5)) | |
1299 | /* If the check for a disk change is done too early after this | |
1300 | * last seek command, the WP bit still reads wrong :-(( | |
1301 | */ | |
1302 | mod_timer(&fd_timer, jiffies + 5); | |
1303 | else | |
1304 | start_check_change_timer(); | |
1305 | start_motor_off_timer(); | |
1306 | ||
1307 | local_irq_save(flags); | |
1308 | stdma_release(); | |
1309 | fdc_busy = 0; | |
1310 | wake_up( &fdc_wait ); | |
1311 | local_irq_restore(flags); | |
1312 | ||
1313 | DPRINT(("finish_fdc() finished\n")); | |
1314 | } | |
1315 | ||
1316 | /* The detection of disk changes is a dark chapter in Atari history :-( | |
1317 | * Because the "Drive ready" signal isn't present in the Atari | |
1318 | * hardware, one has to rely on the "Write Protect". This works fine, | |
1319 | * as long as no write protected disks are used. TOS solves this | |
1320 | * problem by introducing tri-state logic ("maybe changed") and | |
1321 | * looking at the serial number in block 0. This isn't possible for | |
1322 | * Linux, since the floppy driver can't make assumptions about the | |
1323 | * filesystem used on the disk and thus the contents of block 0. I've | |
1324 | * chosen the method to always say "The disk was changed" if it is | |
1325 | * unsure whether it was. This implies that every open or mount | |
1326 | * invalidates the disk buffers if you work with write protected | |
1327 | * disks. But at least this is better than working with incorrect data | |
1328 | * due to unrecognised disk changes. | |
1329 | */ | |
1330 | ||
1331 | static int check_floppy_change(struct gendisk *disk) | |
1332 | { | |
1333 | struct atari_floppy_struct *p = disk->private_data; | |
1334 | unsigned int drive = p - unit; | |
1335 | if (test_bit (drive, &fake_change)) { | |
1336 | /* simulated change (e.g. after formatting) */ | |
1337 | return 1; | |
1338 | } | |
1339 | if (test_bit (drive, &changed_floppies)) { | |
1340 | /* surely changed (the WP signal changed at least once) */ | |
1341 | return 1; | |
1342 | } | |
1343 | if (UD.wpstat) { | |
1344 | /* WP is on -> could be changed: to be sure, buffers should be | |
1345 | * invalidated... | |
1346 | */ | |
1347 | return 1; | |
1348 | } | |
1349 | ||
1350 | return 0; | |
1351 | } | |
1352 | ||
1353 | static int floppy_revalidate(struct gendisk *disk) | |
1354 | { | |
1355 | struct atari_floppy_struct *p = disk->private_data; | |
1356 | unsigned int drive = p - unit; | |
1357 | ||
1358 | if (test_bit(drive, &changed_floppies) || | |
1359 | test_bit(drive, &fake_change) || | |
1360 | p->disktype == 0) { | |
1361 | if (UD.flags & FTD_MSG) | |
1362 | printk(KERN_ERR "floppy: clear format %p!\n", UDT); | |
1363 | BufferDrive = -1; | |
1364 | clear_bit(drive, &fake_change); | |
1365 | clear_bit(drive, &changed_floppies); | |
1366 | /* MSch: clearing geometry makes sense only for autoprobe | |
1367 | formats, for 'permanent user-defined' parameter: | |
1368 | restore default_params[] here if flagged valid! */ | |
1369 | if (default_params[drive].blocks == 0) | |
1370 | UDT = 0; | |
1371 | else | |
1372 | UDT = &default_params[drive]; | |
1373 | } | |
1374 | return 0; | |
1375 | } | |
1376 | ||
1377 | ||
1378 | /* This sets up the global variables describing the current request. */ | |
1379 | ||
1380 | static void setup_req_params( int drive ) | |
1381 | { | |
1382 | int block = ReqBlock + ReqCnt; | |
1383 | ||
1384 | ReqTrack = block / UDT->spt; | |
1385 | ReqSector = block - ReqTrack * UDT->spt + 1; | |
1386 | ReqSide = ReqTrack & 1; | |
1387 | ReqTrack >>= 1; | |
1388 | ReqData = ReqBuffer + 512 * ReqCnt; | |
1389 | ||
1390 | if (UseTrackbuffer) | |
1391 | read_track = (ReqCmd == READ && CURRENT->errors == 0); | |
1392 | else | |
1393 | read_track = 0; | |
1394 | ||
1395 | DPRINT(("Request params: Si=%d Tr=%d Se=%d Data=%08lx\n",ReqSide, | |
1396 | ReqTrack, ReqSector, (unsigned long)ReqData )); | |
1397 | } | |
1398 | ||
1399 | ||
1400 | static void redo_fd_request(void) | |
1401 | { | |
1402 | int drive, type; | |
1403 | struct atari_floppy_struct *floppy; | |
1404 | ||
1405 | DPRINT(("redo_fd_request: CURRENT=%p dev=%s CURRENT->sector=%ld\n", | |
1406 | CURRENT, CURRENT ? CURRENT->rq_disk->disk_name : "", | |
1407 | CURRENT ? CURRENT->sector : 0 )); | |
1408 | ||
1409 | IsFormatting = 0; | |
1410 | ||
1411 | repeat: | |
1412 | ||
1413 | if (!CURRENT) | |
1414 | goto the_end; | |
1415 | ||
1416 | floppy = CURRENT->rq_disk->private_data; | |
1417 | drive = floppy - unit; | |
1418 | type = floppy->type; | |
1419 | ||
1420 | if (!UD.connected) { | |
1421 | /* drive not connected */ | |
1422 | printk(KERN_ERR "Unknown Device: fd%d\n", drive ); | |
1423 | end_request(CURRENT, 0); | |
1424 | goto repeat; | |
1425 | } | |
1426 | ||
1427 | if (type == 0) { | |
1428 | if (!UDT) { | |
1429 | Probing = 1; | |
1430 | UDT = disk_type + StartDiskType[DriveType]; | |
1431 | set_capacity(floppy->disk, UDT->blocks); | |
1432 | UD.autoprobe = 1; | |
1433 | } | |
1434 | } | |
1435 | else { | |
1436 | /* user supplied disk type */ | |
1437 | if (--type >= NUM_DISK_MINORS) { | |
1438 | printk(KERN_WARNING "fd%d: invalid disk format", drive ); | |
1439 | end_request(CURRENT, 0); | |
1440 | goto repeat; | |
1441 | } | |
1442 | if (minor2disktype[type].drive_types > DriveType) { | |
1443 | printk(KERN_WARNING "fd%d: unsupported disk format", drive ); | |
1444 | end_request(CURRENT, 0); | |
1445 | goto repeat; | |
1446 | } | |
1447 | type = minor2disktype[type].index; | |
1448 | UDT = &disk_type[type]; | |
1449 | set_capacity(floppy->disk, UDT->blocks); | |
1450 | UD.autoprobe = 0; | |
1451 | } | |
1452 | ||
1453 | if (CURRENT->sector + 1 > UDT->blocks) { | |
1454 | end_request(CURRENT, 0); | |
1455 | goto repeat; | |
1456 | } | |
1457 | ||
1458 | /* stop deselect timer */ | |
1459 | del_timer( &motor_off_timer ); | |
1460 | ||
1461 | ReqCnt = 0; | |
1462 | ReqCmd = rq_data_dir(CURRENT); | |
1463 | ReqBlock = CURRENT->sector; | |
1464 | ReqBuffer = CURRENT->buffer; | |
1465 | setup_req_params( drive ); | |
1466 | do_fd_action( drive ); | |
1467 | ||
1468 | return; | |
1469 | ||
1470 | the_end: | |
1471 | finish_fdc(); | |
1472 | } | |
1473 | ||
1474 | ||
1475 | void do_fd_request(request_queue_t * q) | |
1476 | { | |
1477 | unsigned long flags; | |
1478 | ||
1479 | DPRINT(("do_fd_request for pid %d\n",current->pid)); | |
1480 | while( fdc_busy ) sleep_on( &fdc_wait ); | |
1481 | fdc_busy = 1; | |
1482 | stdma_lock(floppy_irq, NULL); | |
1483 | ||
1484 | atari_disable_irq( IRQ_MFP_FDC ); | |
1485 | local_save_flags(flags); /* The request function is called with ints | |
1486 | local_irq_disable(); * disabled... so must save the IPL for later */ | |
1487 | redo_fd_request(); | |
1488 | local_irq_restore(flags); | |
1489 | atari_enable_irq( IRQ_MFP_FDC ); | |
1490 | } | |
1491 | ||
1492 | static int fd_ioctl(struct inode *inode, struct file *filp, | |
1493 | unsigned int cmd, unsigned long param) | |
1494 | { | |
1495 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
1496 | struct atari_floppy_struct *floppy = disk->private_data; | |
1497 | int drive = floppy - unit; | |
1498 | int type = floppy->type; | |
1499 | struct atari_format_descr fmt_desc; | |
1500 | struct atari_disk_type *dtp; | |
1501 | struct floppy_struct getprm; | |
1502 | int settype; | |
1503 | struct floppy_struct setprm; | |
1504 | ||
1505 | switch (cmd) { | |
1506 | case FDGETPRM: | |
1507 | if (type) { | |
1508 | if (--type >= NUM_DISK_MINORS) | |
1509 | return -ENODEV; | |
1510 | if (minor2disktype[type].drive_types > DriveType) | |
1511 | return -ENODEV; | |
1512 | type = minor2disktype[type].index; | |
1513 | dtp = &disk_type[type]; | |
1514 | if (UD.flags & FTD_MSG) | |
1515 | printk (KERN_ERR "floppy%d: found dtp %p name %s!\n", | |
1516 | drive, dtp, dtp->name); | |
1517 | } | |
1518 | else { | |
1519 | if (!UDT) | |
1520 | return -ENXIO; | |
1521 | else | |
1522 | dtp = UDT; | |
1523 | } | |
1524 | memset((void *)&getprm, 0, sizeof(getprm)); | |
1525 | getprm.size = dtp->blocks; | |
1526 | getprm.sect = dtp->spt; | |
1527 | getprm.head = 2; | |
1528 | getprm.track = dtp->blocks/dtp->spt/2; | |
1529 | getprm.stretch = dtp->stretch; | |
1530 | if (copy_to_user((void *)param, &getprm, sizeof(getprm))) | |
1531 | return -EFAULT; | |
1532 | return 0; | |
1533 | } | |
1534 | switch (cmd) { | |
1535 | case FDSETPRM: | |
1536 | case FDDEFPRM: | |
1537 | /* | |
1538 | * MSch 7/96: simple 'set geometry' case: just set the | |
1539 | * 'default' device params (minor == 0). | |
1540 | * Currently, the drive geometry is cleared after each | |
1541 | * disk change and subsequent revalidate()! simple | |
1542 | * implementation of FDDEFPRM: save geometry from a | |
1543 | * FDDEFPRM call and restore it in floppy_revalidate() ! | |
1544 | */ | |
1545 | ||
1546 | /* get the parameters from user space */ | |
1547 | if (floppy->ref != 1 && floppy->ref != -1) | |
1548 | return -EBUSY; | |
1549 | if (copy_from_user(&setprm, (void *) param, sizeof(setprm))) | |
1550 | return -EFAULT; | |
1551 | /* | |
1552 | * first of all: check for floppy change and revalidate, | |
1553 | * or the next access will revalidate - and clear UDT :-( | |
1554 | */ | |
1555 | ||
1556 | if (check_floppy_change(disk)) | |
1557 | floppy_revalidate(disk); | |
1558 | ||
1559 | if (UD.flags & FTD_MSG) | |
1560 | printk (KERN_INFO "floppy%d: setting size %d spt %d str %d!\n", | |
1561 | drive, setprm.size, setprm.sect, setprm.stretch); | |
1562 | ||
1563 | /* what if type > 0 here? Overwrite specified entry ? */ | |
1564 | if (type) { | |
1565 | /* refuse to re-set a predefined type for now */ | |
1566 | redo_fd_request(); | |
1567 | return -EINVAL; | |
1568 | } | |
1569 | ||
1570 | /* | |
1571 | * type == 0: first look for a matching entry in the type list, | |
1572 | * and set the UD.disktype field to use the perdefined entry. | |
1573 | * TODO: add user-defined format to head of autoprobe list ? | |
1574 | * Useful to include the user-type for future autodetection! | |
1575 | */ | |
1576 | ||
1577 | for (settype = 0; settype < NUM_DISK_MINORS; settype++) { | |
1578 | int setidx = 0; | |
1579 | if (minor2disktype[settype].drive_types > DriveType) { | |
1580 | /* skip this one, invalid for drive ... */ | |
1581 | continue; | |
1582 | } | |
1583 | setidx = minor2disktype[settype].index; | |
1584 | dtp = &disk_type[setidx]; | |
1585 | ||
1586 | /* found matching entry ?? */ | |
1587 | if ( dtp->blocks == setprm.size | |
1588 | && dtp->spt == setprm.sect | |
1589 | && dtp->stretch == setprm.stretch ) { | |
1590 | if (UD.flags & FTD_MSG) | |
1591 | printk (KERN_INFO "floppy%d: setting %s %p!\n", | |
1592 | drive, dtp->name, dtp); | |
1593 | UDT = dtp; | |
1594 | set_capacity(floppy->disk, UDT->blocks); | |
1595 | ||
1596 | if (cmd == FDDEFPRM) { | |
1597 | /* save settings as permanent default type */ | |
1598 | default_params[drive].name = dtp->name; | |
1599 | default_params[drive].spt = dtp->spt; | |
1600 | default_params[drive].blocks = dtp->blocks; | |
1601 | default_params[drive].fdc_speed = dtp->fdc_speed; | |
1602 | default_params[drive].stretch = dtp->stretch; | |
1603 | } | |
1604 | ||
1605 | return 0; | |
1606 | } | |
1607 | ||
1608 | } | |
1609 | ||
1610 | /* no matching disk type found above - setting user_params */ | |
1611 | ||
1612 | if (cmd == FDDEFPRM) { | |
1613 | /* set permanent type */ | |
1614 | dtp = &default_params[drive]; | |
1615 | } else | |
1616 | /* set user type (reset by disk change!) */ | |
1617 | dtp = &user_params[drive]; | |
1618 | ||
1619 | dtp->name = "user format"; | |
1620 | dtp->blocks = setprm.size; | |
1621 | dtp->spt = setprm.sect; | |
1622 | if (setprm.sect > 14) | |
1623 | dtp->fdc_speed = 3; | |
1624 | else | |
1625 | dtp->fdc_speed = 0; | |
1626 | dtp->stretch = setprm.stretch; | |
1627 | ||
1628 | if (UD.flags & FTD_MSG) | |
1629 | printk (KERN_INFO "floppy%d: blk %d spt %d str %d!\n", | |
1630 | drive, dtp->blocks, dtp->spt, dtp->stretch); | |
1631 | ||
1632 | /* sanity check */ | |
1633 | if (!dtp || setprm.track != dtp->blocks/dtp->spt/2 || | |
1634 | setprm.head != 2) { | |
1635 | redo_fd_request(); | |
1636 | return -EINVAL; | |
1637 | } | |
1638 | ||
1639 | UDT = dtp; | |
1640 | set_capacity(floppy->disk, UDT->blocks); | |
1641 | ||
1642 | return 0; | |
1643 | case FDMSGON: | |
1644 | UD.flags |= FTD_MSG; | |
1645 | return 0; | |
1646 | case FDMSGOFF: | |
1647 | UD.flags &= ~FTD_MSG; | |
1648 | return 0; | |
1649 | case FDSETEMSGTRESH: | |
1650 | return -EINVAL; | |
1651 | case FDFMTBEG: | |
1652 | return 0; | |
1653 | case FDFMTTRK: | |
1654 | if (floppy->ref != 1 && floppy->ref != -1) | |
1655 | return -EBUSY; | |
1656 | if (copy_from_user(&fmt_desc, (void *) param, sizeof(fmt_desc))) | |
1657 | return -EFAULT; | |
1658 | return do_format(drive, type, &fmt_desc); | |
1659 | case FDCLRPRM: | |
1660 | UDT = NULL; | |
1661 | /* MSch: invalidate default_params */ | |
1662 | default_params[drive].blocks = 0; | |
1663 | set_capacity(floppy->disk, MAX_DISK_SIZE * 2); | |
1664 | case FDFMTEND: | |
1665 | case FDFLUSH: | |
1666 | /* invalidate the buffer track to force a reread */ | |
1667 | BufferDrive = -1; | |
1668 | set_bit(drive, &fake_change); | |
1669 | check_disk_change(inode->i_bdev); | |
1670 | return 0; | |
1671 | default: | |
1672 | return -EINVAL; | |
1673 | } | |
1674 | } | |
1675 | ||
1676 | ||
1677 | /* Initialize the 'unit' variable for drive 'drive' */ | |
1678 | ||
1679 | static void __init fd_probe( int drive ) | |
1680 | { | |
1681 | UD.connected = 0; | |
1682 | UDT = NULL; | |
1683 | ||
1684 | if (!fd_test_drive_present( drive )) | |
1685 | return; | |
1686 | ||
1687 | UD.connected = 1; | |
1688 | UD.track = 0; | |
1689 | switch( UserSteprate[drive] ) { | |
1690 | case 2: | |
1691 | UD.steprate = FDCSTEP_2; | |
1692 | break; | |
1693 | case 3: | |
1694 | UD.steprate = FDCSTEP_3; | |
1695 | break; | |
1696 | case 6: | |
1697 | UD.steprate = FDCSTEP_6; | |
1698 | break; | |
1699 | case 12: | |
1700 | UD.steprate = FDCSTEP_12; | |
1701 | break; | |
1702 | default: /* should be -1 for "not set by user" */ | |
1703 | if (ATARIHW_PRESENT( FDCSPEED ) || MACH_IS_MEDUSA) | |
1704 | UD.steprate = FDCSTEP_3; | |
1705 | else | |
1706 | UD.steprate = FDCSTEP_6; | |
1707 | break; | |
1708 | } | |
1709 | MotorOn = 1; /* from probe restore operation! */ | |
1710 | } | |
1711 | ||
1712 | ||
1713 | /* This function tests the physical presence of a floppy drive (not | |
1714 | * whether a disk is inserted). This is done by issuing a restore | |
1715 | * command, waiting max. 2 seconds (that should be enough to move the | |
1716 | * head across the whole disk) and looking at the state of the "TR00" | |
1717 | * signal. This should now be raised if there is a drive connected | |
1718 | * (and there is no hardware failure :-) Otherwise, the drive is | |
1719 | * declared absent. | |
1720 | */ | |
1721 | ||
1722 | static int __init fd_test_drive_present( int drive ) | |
1723 | { | |
1724 | unsigned long timeout; | |
1725 | unsigned char status; | |
1726 | int ok; | |
1727 | ||
1728 | if (drive >= (MACH_IS_FALCON ? 1 : 2)) return( 0 ); | |
1729 | fd_select_drive( drive ); | |
1730 | ||
1731 | /* disable interrupt temporarily */ | |
1732 | atari_turnoff_irq( IRQ_MFP_FDC ); | |
1733 | FDC_WRITE (FDCREG_TRACK, 0xff00); | |
1734 | FDC_WRITE( FDCREG_CMD, FDCCMD_RESTORE | FDCCMDADD_H | FDCSTEP_6 ); | |
1735 | ||
1736 | timeout = jiffies + 2*HZ+HZ/2; | |
1737 | while (time_before(jiffies, timeout)) | |
1738 | if (!(mfp.par_dt_reg & 0x20)) | |
1739 | break; | |
1740 | ||
1741 | status = FDC_READ( FDCREG_STATUS ); | |
1742 | ok = (status & FDCSTAT_TR00) != 0; | |
1743 | ||
1744 | /* force interrupt to abort restore operation (FDC would try | |
1745 | * about 50 seconds!) */ | |
1746 | FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); | |
1747 | udelay(500); | |
1748 | status = FDC_READ( FDCREG_STATUS ); | |
1749 | udelay(20); | |
1750 | ||
1751 | if (ok) { | |
1752 | /* dummy seek command to make WP bit accessible */ | |
1753 | FDC_WRITE( FDCREG_DATA, 0 ); | |
1754 | FDC_WRITE( FDCREG_CMD, FDCCMD_SEEK ); | |
1755 | while( mfp.par_dt_reg & 0x20 ) | |
1756 | ; | |
1757 | status = FDC_READ( FDCREG_STATUS ); | |
1758 | } | |
1759 | ||
1760 | atari_turnon_irq( IRQ_MFP_FDC ); | |
1761 | return( ok ); | |
1762 | } | |
1763 | ||
1764 | ||
1765 | /* Look how many and which kind of drives are connected. If there are | |
1766 | * floppies, additionally start the disk-change and motor-off timers. | |
1767 | */ | |
1768 | ||
1769 | static void __init config_types( void ) | |
1770 | { | |
1771 | int drive, cnt = 0; | |
1772 | ||
1773 | /* for probing drives, set the FDC speed to 8 MHz */ | |
1774 | if (ATARIHW_PRESENT(FDCSPEED)) | |
1775 | dma_wd.fdc_speed = 0; | |
1776 | ||
1777 | printk(KERN_INFO "Probing floppy drive(s):\n"); | |
1778 | for( drive = 0; drive < FD_MAX_UNITS; drive++ ) { | |
1779 | fd_probe( drive ); | |
1780 | if (UD.connected) { | |
1781 | printk(KERN_INFO "fd%d\n", drive); | |
1782 | ++cnt; | |
1783 | } | |
1784 | } | |
1785 | ||
1786 | if (FDC_READ( FDCREG_STATUS ) & FDCSTAT_BUSY) { | |
1787 | /* If FDC is still busy from probing, give it another FORCI | |
1788 | * command to abort the operation. If this isn't done, the FDC | |
1789 | * will interrupt later and its IRQ line stays low, because | |
1790 | * the status register isn't read. And this will block any | |
1791 | * interrupts on this IRQ line :-( | |
1792 | */ | |
1793 | FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); | |
1794 | udelay(500); | |
1795 | FDC_READ( FDCREG_STATUS ); | |
1796 | udelay(20); | |
1797 | } | |
1798 | ||
1799 | if (cnt > 0) { | |
1800 | start_motor_off_timer(); | |
1801 | if (cnt == 1) fd_select_drive( 0 ); | |
1802 | start_check_change_timer(); | |
1803 | } | |
1804 | } | |
1805 | ||
1806 | /* | |
1807 | * floppy_open check for aliasing (/dev/fd0 can be the same as | |
1808 | * /dev/PS0 etc), and disallows simultaneous access to the same | |
1809 | * drive with different device numbers. | |
1810 | */ | |
1811 | ||
1812 | static int floppy_open( struct inode *inode, struct file *filp ) | |
1813 | { | |
1814 | struct atari_floppy_struct *p = inode->i_bdev->bd_disk->private_data; | |
1815 | int type = iminor(inode) >> 2; | |
1816 | ||
1817 | DPRINT(("fd_open: type=%d\n",type)); | |
1818 | if (p->ref && p->type != type) | |
1819 | return -EBUSY; | |
1820 | ||
1821 | if (p->ref == -1 || (p->ref && filp->f_flags & O_EXCL)) | |
1822 | return -EBUSY; | |
1823 | ||
1824 | if (filp->f_flags & O_EXCL) | |
1825 | p->ref = -1; | |
1826 | else | |
1827 | p->ref++; | |
1828 | ||
1829 | p->type = type; | |
1830 | ||
1831 | if (filp->f_flags & O_NDELAY) | |
1832 | return 0; | |
1833 | ||
1834 | if (filp->f_mode & 3) { | |
1835 | check_disk_change(inode->i_bdev); | |
1836 | if (filp->f_mode & 2) { | |
1837 | if (p->wpstat) { | |
1838 | if (p->ref < 0) | |
1839 | p->ref = 0; | |
1840 | else | |
1841 | p->ref--; | |
1842 | floppy_release(inode, filp); | |
1843 | return -EROFS; | |
1844 | } | |
1845 | } | |
1846 | } | |
1847 | return 0; | |
1848 | } | |
1849 | ||
1850 | ||
1851 | static int floppy_release( struct inode * inode, struct file * filp ) | |
1852 | { | |
1853 | struct atari_floppy_struct *p = inode->i_bdev->bd_disk->private_data; | |
1854 | if (p->ref < 0) | |
1855 | p->ref = 0; | |
1856 | else if (!p->ref--) { | |
1857 | printk(KERN_ERR "floppy_release with fd_ref == 0"); | |
1858 | p->ref = 0; | |
1859 | } | |
1860 | return 0; | |
1861 | } | |
1862 | ||
1863 | static struct block_device_operations floppy_fops = { | |
1864 | .owner = THIS_MODULE, | |
1865 | .open = floppy_open, | |
1866 | .release = floppy_release, | |
1867 | .ioctl = fd_ioctl, | |
1868 | .media_changed = check_floppy_change, | |
1869 | .revalidate_disk= floppy_revalidate, | |
1870 | }; | |
1871 | ||
1872 | static struct kobject *floppy_find(dev_t dev, int *part, void *data) | |
1873 | { | |
1874 | int drive = *part & 3; | |
1875 | int type = *part >> 2; | |
1876 | if (drive >= FD_MAX_UNITS || type > NUM_DISK_MINORS) | |
1877 | return NULL; | |
1878 | *part = 0; | |
1879 | return get_disk(unit[drive].disk); | |
1880 | } | |
1881 | ||
1882 | static int __init atari_floppy_init (void) | |
1883 | { | |
1884 | int i; | |
1885 | ||
1886 | if (!MACH_IS_ATARI) | |
1887 | /* Amiga, Mac, ... don't have Atari-compatible floppy :-) */ | |
1888 | return -ENXIO; | |
1889 | ||
1890 | if (MACH_IS_HADES) | |
1891 | /* Hades doesn't have Atari-compatible floppy */ | |
1892 | return -ENXIO; | |
1893 | ||
1894 | if (register_blkdev(FLOPPY_MAJOR,"fd")) | |
1895 | return -EBUSY; | |
1896 | ||
1897 | for (i = 0; i < FD_MAX_UNITS; i++) { | |
1898 | unit[i].disk = alloc_disk(1); | |
1899 | if (!unit[i].disk) | |
1900 | goto Enomem; | |
1901 | } | |
1902 | ||
1903 | if (UseTrackbuffer < 0) | |
1904 | /* not set by user -> use default: for now, we turn | |
1905 | track buffering off for all Medusas, though it | |
1906 | could be used with ones that have a counter | |
1907 | card. But the test is too hard :-( */ | |
1908 | UseTrackbuffer = !MACH_IS_MEDUSA; | |
1909 | ||
1910 | /* initialize variables */ | |
1911 | SelectedDrive = -1; | |
1912 | BufferDrive = -1; | |
1913 | ||
1914 | DMABuffer = atari_stram_alloc(BUFFER_SIZE+512, "ataflop"); | |
1915 | if (!DMABuffer) { | |
1916 | printk(KERN_ERR "atari_floppy_init: cannot get dma buffer\n"); | |
1917 | goto Enomem; | |
1918 | } | |
1919 | TrackBuffer = DMABuffer + 512; | |
1920 | PhysDMABuffer = virt_to_phys(DMABuffer); | |
1921 | PhysTrackBuffer = virt_to_phys(TrackBuffer); | |
1922 | BufferDrive = BufferSide = BufferTrack = -1; | |
1923 | ||
1924 | floppy_queue = blk_init_queue(do_fd_request, &ataflop_lock); | |
1925 | if (!floppy_queue) | |
1926 | goto Enomem; | |
1927 | ||
1928 | for (i = 0; i < FD_MAX_UNITS; i++) { | |
1929 | unit[i].track = -1; | |
1930 | unit[i].flags = 0; | |
1931 | unit[i].disk->major = FLOPPY_MAJOR; | |
1932 | unit[i].disk->first_minor = i; | |
1933 | sprintf(unit[i].disk->disk_name, "fd%d", i); | |
1934 | unit[i].disk->fops = &floppy_fops; | |
1935 | unit[i].disk->private_data = &unit[i]; | |
1936 | unit[i].disk->queue = floppy_queue; | |
1937 | set_capacity(unit[i].disk, MAX_DISK_SIZE * 2); | |
1938 | add_disk(unit[i].disk); | |
1939 | } | |
1940 | ||
1941 | blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE, | |
1942 | floppy_find, NULL, NULL); | |
1943 | ||
1944 | printk(KERN_INFO "Atari floppy driver: max. %cD, %strack buffering\n", | |
1945 | DriveType == 0 ? 'D' : DriveType == 1 ? 'H' : 'E', | |
1946 | UseTrackbuffer ? "" : "no "); | |
1947 | config_types(); | |
1948 | ||
1949 | return 0; | |
1950 | Enomem: | |
1951 | while (i--) | |
1952 | put_disk(unit[i].disk); | |
1953 | if (floppy_queue) | |
1954 | blk_cleanup_queue(floppy_queue); | |
1955 | unregister_blkdev(FLOPPY_MAJOR, "fd"); | |
1956 | return -ENOMEM; | |
1957 | } | |
1958 | ||
1959 | ||
1960 | void __init atari_floppy_setup( char *str, int *ints ) | |
1961 | { | |
1962 | int i; | |
1963 | ||
1964 | if (ints[0] < 1) { | |
1965 | printk(KERN_ERR "ataflop_setup: no arguments!\n" ); | |
1966 | return; | |
1967 | } | |
1968 | else if (ints[0] > 2+FD_MAX_UNITS) { | |
1969 | printk(KERN_ERR "ataflop_setup: too many arguments\n" ); | |
1970 | } | |
1971 | ||
1972 | if (ints[1] < 0 || ints[1] > 2) | |
1973 | printk(KERN_ERR "ataflop_setup: bad drive type\n" ); | |
1974 | else | |
1975 | DriveType = ints[1]; | |
1976 | ||
1977 | if (ints[0] >= 2) | |
1978 | UseTrackbuffer = (ints[2] > 0); | |
1979 | ||
1980 | for( i = 3; i <= ints[0] && i-3 < FD_MAX_UNITS; ++i ) { | |
1981 | if (ints[i] != 2 && ints[i] != 3 && ints[i] != 6 && ints[i] != 12) | |
1982 | printk(KERN_ERR "ataflop_setup: bad steprate\n" ); | |
1983 | else | |
1984 | UserSteprate[i-3] = ints[i]; | |
1985 | } | |
1986 | } | |
1987 | ||
1988 | static void atari_floppy_exit(void) | |
1989 | { | |
1990 | int i; | |
1991 | blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); | |
1992 | for (i = 0; i < FD_MAX_UNITS; i++) { | |
1993 | del_gendisk(unit[i].disk); | |
1994 | put_disk(unit[i].disk); | |
1995 | } | |
1996 | unregister_blkdev(FLOPPY_MAJOR, "fd"); | |
1997 | ||
1998 | blk_cleanup_queue(floppy_queue); | |
1999 | del_timer_sync(&fd_timer); | |
2000 | atari_stram_free( DMABuffer ); | |
2001 | } | |
2002 | ||
2003 | module_init(atari_floppy_init) | |
2004 | module_exit(atari_floppy_exit) | |
2005 | ||
2006 | MODULE_LICENSE("GPL"); |