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