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 72 #include <asm/atafd.h> 73 #include <asm/atafdreg.h> 74 #include <asm/atariints.h> 75 #include <asm/atari_stdma.h> 76 #include <asm/atari_stram.h> 77 78 #define FD_MAX_UNITS 2 79 80 #undef DEBUG 81 82 static DEFINE_MUTEX(ataflop_mutex); 83 static struct request *fd_request; 84 static int fdc_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 } atari_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 ARRAY_SIZE(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_param(UseTrackbuffer, int, 0); 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_param_array(UserSteprate, int, NULL, 0); 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); 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_locked_ioctl(struct block_device *bdev, fmode_t mode, 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 block_device *bdev, fmode_t mode); 370 static void floppy_release(struct gendisk *disk, fmode_t mode); 371 372 /************************* End of Prototypes **************************/ 373 374 static DEFINE_TIMER(motor_off_timer, fd_motor_off_timer, 0, 0); 375 static DEFINE_TIMER(readtrack_timer, fd_readtrack_check, 0, 0); 376 static DEFINE_TIMER(timeout_timer, fd_times_out, 0, 0); 377 static DEFINE_TIMER(fd_timer, check_change, 0, 0); 378 379 static void fd_end_request_cur(int err) 380 { 381 if (!__blk_end_request_cur(fd_request, err)) 382 fd_request = NULL; 383 } 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) 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 (!fd_request) 616 return; 617 618 fd_request->errors++; 619 if (fd_request->errors >= MAX_ERRORS) { 620 printk(KERN_ERR "fd%d: too many errors.\n", SelectedDrive ); 621 fd_end_request_cur(-EIO); 622 } 623 else if (fd_request->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 = &atari_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 < blk_rq_cur_sectors(fd_request)) { 735 /* read next sector */ 736 setup_req_params( drive ); 737 goto repeat; 738 } 739 else { 740 /* all sectors finished */ 741 fd_end_request_cur(0); 742 redo_fd_request(); 743 return; 744 } 745 } 746 else { 747 /* cmd == WRITE, pay attention to track buffer 748 * consistency! */ 749 copy_buffer( ReqData, SECTOR_BUFFER(ReqSector) ); 750 } 751 } 752 } 753 754 if (SelectedDrive != drive) 755 fd_select_drive( drive ); 756 757 if (UD.track == -1) 758 fd_calibrate(); 759 else if (UD.track != ReqTrack << UDT->stretch) 760 fd_seek(); 761 else if (IsFormatting) 762 fd_writetrack(); 763 else 764 fd_rwsec(); 765 } 766 767 768 /* Seek to track 0 if the current track is unknown */ 769 770 static void fd_calibrate( void ) 771 { 772 if (SUD.track >= 0) { 773 fd_calibrate_done( 0 ); 774 return; 775 } 776 777 if (ATARIHW_PRESENT(FDCSPEED)) 778 dma_wd.fdc_speed = 0; /* always seek with 8 Mhz */; 779 DPRINT(("fd_calibrate\n")); 780 SET_IRQ_HANDLER( fd_calibrate_done ); 781 /* we can't verify, since the speed may be incorrect */ 782 FDC_WRITE( FDCREG_CMD, FDCCMD_RESTORE | SUD.steprate ); 783 784 NeedSeek = 1; 785 MotorOn = 1; 786 start_timeout(); 787 /* wait for IRQ */ 788 } 789 790 791 static void fd_calibrate_done( int status ) 792 { 793 DPRINT(("fd_calibrate_done()\n")); 794 stop_timeout(); 795 796 /* set the correct speed now */ 797 if (ATARIHW_PRESENT(FDCSPEED)) 798 dma_wd.fdc_speed = SUDT->fdc_speed; 799 if (status & FDCSTAT_RECNF) { 800 printk(KERN_ERR "fd%d: restore failed\n", SelectedDrive ); 801 fd_error(); 802 } 803 else { 804 SUD.track = 0; 805 fd_seek(); 806 } 807 } 808 809 810 /* Seek the drive to the requested track. The drive must have been 811 * calibrated at some point before this. 812 */ 813 814 static void fd_seek( void ) 815 { 816 if (SUD.track == ReqTrack << SUDT->stretch) { 817 fd_seek_done( 0 ); 818 return; 819 } 820 821 if (ATARIHW_PRESENT(FDCSPEED)) { 822 dma_wd.fdc_speed = 0; /* always seek witch 8 Mhz */ 823 MFPDELAY(); 824 } 825 826 DPRINT(("fd_seek() to track %d\n",ReqTrack)); 827 FDC_WRITE( FDCREG_DATA, ReqTrack << SUDT->stretch); 828 udelay(25); 829 SET_IRQ_HANDLER( fd_seek_done ); 830 FDC_WRITE( FDCREG_CMD, FDCCMD_SEEK | SUD.steprate ); 831 832 MotorOn = 1; 833 set_head_settle_flag(); 834 start_timeout(); 835 /* wait for IRQ */ 836 } 837 838 839 static void fd_seek_done( int status ) 840 { 841 DPRINT(("fd_seek_done()\n")); 842 stop_timeout(); 843 844 /* set the correct speed */ 845 if (ATARIHW_PRESENT(FDCSPEED)) 846 dma_wd.fdc_speed = SUDT->fdc_speed; 847 if (status & FDCSTAT_RECNF) { 848 printk(KERN_ERR "fd%d: seek error (to track %d)\n", 849 SelectedDrive, ReqTrack ); 850 /* we don't know exactly which track we are on now! */ 851 SUD.track = -1; 852 fd_error(); 853 } 854 else { 855 SUD.track = ReqTrack << SUDT->stretch; 856 NeedSeek = 0; 857 if (IsFormatting) 858 fd_writetrack(); 859 else 860 fd_rwsec(); 861 } 862 } 863 864 865 /* This does the actual reading/writing after positioning the head 866 * over the correct track. 867 */ 868 869 static int MultReadInProgress = 0; 870 871 872 static void fd_rwsec( void ) 873 { 874 unsigned long paddr, flags; 875 unsigned int rwflag, old_motoron; 876 unsigned int track; 877 878 DPRINT(("fd_rwsec(), Sec=%d, Access=%c\n",ReqSector, ReqCmd == WRITE ? 'w' : 'r' )); 879 if (ReqCmd == WRITE) { 880 if (ATARIHW_PRESENT(EXTD_DMA)) { 881 paddr = virt_to_phys(ReqData); 882 } 883 else { 884 copy_buffer( ReqData, DMABuffer ); 885 paddr = PhysDMABuffer; 886 } 887 dma_cache_maintenance( paddr, 512, 1 ); 888 rwflag = 0x100; 889 } 890 else { 891 if (read_track) 892 paddr = PhysTrackBuffer; 893 else 894 paddr = ATARIHW_PRESENT(EXTD_DMA) ? 895 virt_to_phys(ReqData) : PhysDMABuffer; 896 rwflag = 0; 897 } 898 899 fd_select_side( ReqSide ); 900 901 /* Start sector of this operation */ 902 FDC_WRITE( FDCREG_SECTOR, read_track ? 1 : ReqSector ); 903 MFPDELAY(); 904 /* Cheat for track if stretch != 0 */ 905 if (SUDT->stretch) { 906 track = FDC_READ( FDCREG_TRACK); 907 MFPDELAY(); 908 FDC_WRITE( FDCREG_TRACK, track >> SUDT->stretch); 909 } 910 udelay(25); 911 912 /* Setup DMA */ 913 local_irq_save(flags); 914 dma_wd.dma_lo = (unsigned char)paddr; 915 MFPDELAY(); 916 paddr >>= 8; 917 dma_wd.dma_md = (unsigned char)paddr; 918 MFPDELAY(); 919 paddr >>= 8; 920 if (ATARIHW_PRESENT(EXTD_DMA)) 921 st_dma_ext_dmahi = (unsigned short)paddr; 922 else 923 dma_wd.dma_hi = (unsigned char)paddr; 924 MFPDELAY(); 925 local_irq_restore(flags); 926 927 /* Clear FIFO and switch DMA to correct mode */ 928 dma_wd.dma_mode_status = 0x90 | rwflag; 929 MFPDELAY(); 930 dma_wd.dma_mode_status = 0x90 | (rwflag ^ 0x100); 931 MFPDELAY(); 932 dma_wd.dma_mode_status = 0x90 | rwflag; 933 MFPDELAY(); 934 935 /* How many sectors for DMA */ 936 dma_wd.fdc_acces_seccount = read_track ? SUDT->spt : 1; 937 938 udelay(25); 939 940 /* Start operation */ 941 dma_wd.dma_mode_status = FDCSELREG_STP | rwflag; 942 udelay(25); 943 SET_IRQ_HANDLER( fd_rwsec_done ); 944 dma_wd.fdc_acces_seccount = 945 (get_head_settle_flag() | 946 (rwflag ? FDCCMD_WRSEC : (FDCCMD_RDSEC | (read_track ? FDCCMDADD_M : 0)))); 947 948 old_motoron = MotorOn; 949 MotorOn = 1; 950 NeedSeek = 1; 951 /* wait for interrupt */ 952 953 if (read_track) { 954 /* If reading a whole track, wait about one disk rotation and 955 * then check if all sectors are read. The FDC will even 956 * search for the first non-existent sector and need 1 sec to 957 * recognise that it isn't present :-( 958 */ 959 MultReadInProgress = 1; 960 mod_timer(&readtrack_timer, 961 /* 1 rot. + 5 rot.s if motor was off */ 962 jiffies + HZ/5 + (old_motoron ? 0 : HZ)); 963 } 964 start_timeout(); 965 } 966 967 968 static void fd_readtrack_check( unsigned long dummy ) 969 { 970 unsigned long flags, addr, addr2; 971 972 local_irq_save(flags); 973 974 if (!MultReadInProgress) { 975 /* This prevents a race condition that could arise if the 976 * interrupt is triggered while the calling of this timer 977 * callback function takes place. The IRQ function then has 978 * already cleared 'MultReadInProgress' when flow of control 979 * gets here. 980 */ 981 local_irq_restore(flags); 982 return; 983 } 984 985 /* get the current DMA address */ 986 /* ++ f.a. read twice to avoid being fooled by switcher */ 987 addr = 0; 988 do { 989 addr2 = addr; 990 addr = dma_wd.dma_lo & 0xff; 991 MFPDELAY(); 992 addr |= (dma_wd.dma_md & 0xff) << 8; 993 MFPDELAY(); 994 if (ATARIHW_PRESENT( EXTD_DMA )) 995 addr |= (st_dma_ext_dmahi & 0xffff) << 16; 996 else 997 addr |= (dma_wd.dma_hi & 0xff) << 16; 998 MFPDELAY(); 999 } while(addr != addr2); 1000 1001 if (addr >= PhysTrackBuffer + SUDT->spt*512) { 1002 /* already read enough data, force an FDC interrupt to stop 1003 * the read operation 1004 */ 1005 SET_IRQ_HANDLER( NULL ); 1006 MultReadInProgress = 0; 1007 local_irq_restore(flags); 1008 DPRINT(("fd_readtrack_check(): done\n")); 1009 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); 1010 udelay(25); 1011 1012 /* No error until now -- the FDC would have interrupted 1013 * otherwise! 1014 */ 1015 fd_rwsec_done1(0); 1016 } 1017 else { 1018 /* not yet finished, wait another tenth rotation */ 1019 local_irq_restore(flags); 1020 DPRINT(("fd_readtrack_check(): not yet finished\n")); 1021 mod_timer(&readtrack_timer, jiffies + HZ/5/10); 1022 } 1023 } 1024 1025 1026 static void fd_rwsec_done( int status ) 1027 { 1028 DPRINT(("fd_rwsec_done()\n")); 1029 1030 if (read_track) { 1031 del_timer(&readtrack_timer); 1032 if (!MultReadInProgress) 1033 return; 1034 MultReadInProgress = 0; 1035 } 1036 fd_rwsec_done1(status); 1037 } 1038 1039 static void fd_rwsec_done1(int status) 1040 { 1041 unsigned int track; 1042 1043 stop_timeout(); 1044 1045 /* Correct the track if stretch != 0 */ 1046 if (SUDT->stretch) { 1047 track = FDC_READ( FDCREG_TRACK); 1048 MFPDELAY(); 1049 FDC_WRITE( FDCREG_TRACK, track << SUDT->stretch); 1050 } 1051 1052 if (!UseTrackbuffer) { 1053 dma_wd.dma_mode_status = 0x90; 1054 MFPDELAY(); 1055 if (!(dma_wd.dma_mode_status & 0x01)) { 1056 printk(KERN_ERR "fd%d: DMA error\n", SelectedDrive ); 1057 goto err_end; 1058 } 1059 } 1060 MFPDELAY(); 1061 1062 if (ReqCmd == WRITE && (status & FDCSTAT_WPROT)) { 1063 printk(KERN_NOTICE "fd%d: is write protected\n", SelectedDrive ); 1064 goto err_end; 1065 } 1066 if ((status & FDCSTAT_RECNF) && 1067 /* RECNF is no error after a multiple read when the FDC 1068 searched for a non-existent sector! */ 1069 !(read_track && FDC_READ(FDCREG_SECTOR) > SUDT->spt)) { 1070 if (Probing) { 1071 if (SUDT > atari_disk_type) { 1072 if (SUDT[-1].blocks > ReqBlock) { 1073 /* try another disk type */ 1074 SUDT--; 1075 set_capacity(unit[SelectedDrive].disk, 1076 SUDT->blocks); 1077 } else 1078 Probing = 0; 1079 } 1080 else { 1081 if (SUD.flags & FTD_MSG) 1082 printk(KERN_INFO "fd%d: Auto-detected floppy type %s\n", 1083 SelectedDrive, SUDT->name ); 1084 Probing=0; 1085 } 1086 } else { 1087 /* record not found, but not probing. Maybe stretch wrong ? Restart probing */ 1088 if (SUD.autoprobe) { 1089 SUDT = atari_disk_type + StartDiskType[DriveType]; 1090 set_capacity(unit[SelectedDrive].disk, 1091 SUDT->blocks); 1092 Probing = 1; 1093 } 1094 } 1095 if (Probing) { 1096 if (ATARIHW_PRESENT(FDCSPEED)) { 1097 dma_wd.fdc_speed = SUDT->fdc_speed; 1098 MFPDELAY(); 1099 } 1100 setup_req_params( SelectedDrive ); 1101 BufferDrive = -1; 1102 do_fd_action( SelectedDrive ); 1103 return; 1104 } 1105 1106 printk(KERN_ERR "fd%d: sector %d not found (side %d, track %d)\n", 1107 SelectedDrive, FDC_READ (FDCREG_SECTOR), ReqSide, ReqTrack ); 1108 goto err_end; 1109 } 1110 if (status & FDCSTAT_CRC) { 1111 printk(KERN_ERR "fd%d: CRC error (side %d, track %d, sector %d)\n", 1112 SelectedDrive, ReqSide, ReqTrack, FDC_READ (FDCREG_SECTOR) ); 1113 goto err_end; 1114 } 1115 if (status & FDCSTAT_LOST) { 1116 printk(KERN_ERR "fd%d: lost data (side %d, track %d, sector %d)\n", 1117 SelectedDrive, ReqSide, ReqTrack, FDC_READ (FDCREG_SECTOR) ); 1118 goto err_end; 1119 } 1120 1121 Probing = 0; 1122 1123 if (ReqCmd == READ) { 1124 if (!read_track) { 1125 void *addr; 1126 addr = ATARIHW_PRESENT( EXTD_DMA ) ? ReqData : DMABuffer; 1127 dma_cache_maintenance( virt_to_phys(addr), 512, 0 ); 1128 if (!ATARIHW_PRESENT( EXTD_DMA )) 1129 copy_buffer (addr, ReqData); 1130 } else { 1131 dma_cache_maintenance( PhysTrackBuffer, MaxSectors[DriveType] * 512, 0 ); 1132 BufferDrive = SelectedDrive; 1133 BufferSide = ReqSide; 1134 BufferTrack = ReqTrack; 1135 copy_buffer (SECTOR_BUFFER (ReqSector), ReqData); 1136 } 1137 } 1138 1139 if (++ReqCnt < blk_rq_cur_sectors(fd_request)) { 1140 /* read next sector */ 1141 setup_req_params( SelectedDrive ); 1142 do_fd_action( SelectedDrive ); 1143 } 1144 else { 1145 /* all sectors finished */ 1146 fd_end_request_cur(0); 1147 redo_fd_request(); 1148 } 1149 return; 1150 1151 err_end: 1152 BufferDrive = -1; 1153 fd_error(); 1154 } 1155 1156 1157 static void fd_writetrack( void ) 1158 { 1159 unsigned long paddr, flags; 1160 unsigned int track; 1161 1162 DPRINT(("fd_writetrack() Tr=%d Si=%d\n", ReqTrack, ReqSide )); 1163 1164 paddr = PhysTrackBuffer; 1165 dma_cache_maintenance( paddr, BUFFER_SIZE, 1 ); 1166 1167 fd_select_side( ReqSide ); 1168 1169 /* Cheat for track if stretch != 0 */ 1170 if (SUDT->stretch) { 1171 track = FDC_READ( FDCREG_TRACK); 1172 MFPDELAY(); 1173 FDC_WRITE(FDCREG_TRACK,track >> SUDT->stretch); 1174 } 1175 udelay(40); 1176 1177 /* Setup DMA */ 1178 local_irq_save(flags); 1179 dma_wd.dma_lo = (unsigned char)paddr; 1180 MFPDELAY(); 1181 paddr >>= 8; 1182 dma_wd.dma_md = (unsigned char)paddr; 1183 MFPDELAY(); 1184 paddr >>= 8; 1185 if (ATARIHW_PRESENT( EXTD_DMA )) 1186 st_dma_ext_dmahi = (unsigned short)paddr; 1187 else 1188 dma_wd.dma_hi = (unsigned char)paddr; 1189 MFPDELAY(); 1190 local_irq_restore(flags); 1191 1192 /* Clear FIFO and switch DMA to correct mode */ 1193 dma_wd.dma_mode_status = 0x190; 1194 MFPDELAY(); 1195 dma_wd.dma_mode_status = 0x90; 1196 MFPDELAY(); 1197 dma_wd.dma_mode_status = 0x190; 1198 MFPDELAY(); 1199 1200 /* How many sectors for DMA */ 1201 dma_wd.fdc_acces_seccount = BUFFER_SIZE/512; 1202 udelay(40); 1203 1204 /* Start operation */ 1205 dma_wd.dma_mode_status = FDCSELREG_STP | 0x100; 1206 udelay(40); 1207 SET_IRQ_HANDLER( fd_writetrack_done ); 1208 dma_wd.fdc_acces_seccount = FDCCMD_WRTRA | get_head_settle_flag(); 1209 1210 MotorOn = 1; 1211 start_timeout(); 1212 /* wait for interrupt */ 1213 } 1214 1215 1216 static void fd_writetrack_done( int status ) 1217 { 1218 DPRINT(("fd_writetrack_done()\n")); 1219 1220 stop_timeout(); 1221 1222 if (status & FDCSTAT_WPROT) { 1223 printk(KERN_NOTICE "fd%d: is write protected\n", SelectedDrive ); 1224 goto err_end; 1225 } 1226 if (status & FDCSTAT_LOST) { 1227 printk(KERN_ERR "fd%d: lost data (side %d, track %d)\n", 1228 SelectedDrive, ReqSide, ReqTrack ); 1229 goto err_end; 1230 } 1231 1232 wake_up( &format_wait ); 1233 return; 1234 1235 err_end: 1236 fd_error(); 1237 } 1238 1239 static void fd_times_out( unsigned long dummy ) 1240 { 1241 atari_disable_irq( IRQ_MFP_FDC ); 1242 if (!FloppyIRQHandler) goto end; /* int occurred after timer was fired, but 1243 * before we came here... */ 1244 1245 SET_IRQ_HANDLER( NULL ); 1246 /* If the timeout occurred while the readtrack_check timer was 1247 * active, we need to cancel it, else bad things will happen */ 1248 if (UseTrackbuffer) 1249 del_timer( &readtrack_timer ); 1250 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); 1251 udelay( 25 ); 1252 1253 printk(KERN_ERR "floppy timeout\n" ); 1254 fd_error(); 1255 end: 1256 atari_enable_irq( IRQ_MFP_FDC ); 1257 } 1258 1259 1260 /* The (noop) seek operation here is needed to make the WP bit in the 1261 * FDC status register accessible for check_change. If the last disk 1262 * operation would have been a RDSEC, this bit would always read as 0 1263 * no matter what :-( To save time, the seek goes to the track we're 1264 * already on. 1265 */ 1266 1267 static void finish_fdc( void ) 1268 { 1269 if (!NeedSeek) { 1270 finish_fdc_done( 0 ); 1271 } 1272 else { 1273 DPRINT(("finish_fdc: dummy seek started\n")); 1274 FDC_WRITE (FDCREG_DATA, SUD.track); 1275 SET_IRQ_HANDLER( finish_fdc_done ); 1276 FDC_WRITE (FDCREG_CMD, FDCCMD_SEEK); 1277 MotorOn = 1; 1278 start_timeout(); 1279 /* we must wait for the IRQ here, because the ST-DMA 1280 is released immediately afterwards and the interrupt 1281 may be delivered to the wrong driver. */ 1282 } 1283 } 1284 1285 1286 static void finish_fdc_done( int dummy ) 1287 { 1288 unsigned long flags; 1289 1290 DPRINT(("finish_fdc_done entered\n")); 1291 stop_timeout(); 1292 NeedSeek = 0; 1293 1294 if (timer_pending(&fd_timer) && time_before(fd_timer.expires, jiffies + 5)) 1295 /* If the check for a disk change is done too early after this 1296 * last seek command, the WP bit still reads wrong :-(( 1297 */ 1298 mod_timer(&fd_timer, jiffies + 5); 1299 else 1300 start_check_change_timer(); 1301 start_motor_off_timer(); 1302 1303 local_irq_save(flags); 1304 stdma_release(); 1305 fdc_busy = 0; 1306 wake_up( &fdc_wait ); 1307 local_irq_restore(flags); 1308 1309 DPRINT(("finish_fdc() finished\n")); 1310 } 1311 1312 /* The detection of disk changes is a dark chapter in Atari history :-( 1313 * Because the "Drive ready" signal isn't present in the Atari 1314 * hardware, one has to rely on the "Write Protect". This works fine, 1315 * as long as no write protected disks are used. TOS solves this 1316 * problem by introducing tri-state logic ("maybe changed") and 1317 * looking at the serial number in block 0. This isn't possible for 1318 * Linux, since the floppy driver can't make assumptions about the 1319 * filesystem used on the disk and thus the contents of block 0. I've 1320 * chosen the method to always say "The disk was changed" if it is 1321 * unsure whether it was. This implies that every open or mount 1322 * invalidates the disk buffers if you work with write protected 1323 * disks. But at least this is better than working with incorrect data 1324 * due to unrecognised disk changes. 1325 */ 1326 1327 static unsigned int floppy_check_events(struct gendisk *disk, 1328 unsigned int clearing) 1329 { 1330 struct atari_floppy_struct *p = disk->private_data; 1331 unsigned int drive = p - unit; 1332 if (test_bit (drive, &fake_change)) { 1333 /* simulated change (e.g. after formatting) */ 1334 return DISK_EVENT_MEDIA_CHANGE; 1335 } 1336 if (test_bit (drive, &changed_floppies)) { 1337 /* surely changed (the WP signal changed at least once) */ 1338 return DISK_EVENT_MEDIA_CHANGE; 1339 } 1340 if (UD.wpstat) { 1341 /* WP is on -> could be changed: to be sure, buffers should be 1342 * invalidated... 1343 */ 1344 return DISK_EVENT_MEDIA_CHANGE; 1345 } 1346 1347 return 0; 1348 } 1349 1350 static int floppy_revalidate(struct gendisk *disk) 1351 { 1352 struct atari_floppy_struct *p = disk->private_data; 1353 unsigned int drive = p - unit; 1354 1355 if (test_bit(drive, &changed_floppies) || 1356 test_bit(drive, &fake_change) || 1357 p->disktype == 0) { 1358 if (UD.flags & FTD_MSG) 1359 printk(KERN_ERR "floppy: clear format %p!\n", UDT); 1360 BufferDrive = -1; 1361 clear_bit(drive, &fake_change); 1362 clear_bit(drive, &changed_floppies); 1363 /* MSch: clearing geometry makes sense only for autoprobe 1364 formats, for 'permanent user-defined' parameter: 1365 restore default_params[] here if flagged valid! */ 1366 if (default_params[drive].blocks == 0) 1367 UDT = NULL; 1368 else 1369 UDT = &default_params[drive]; 1370 } 1371 return 0; 1372 } 1373 1374 1375 /* This sets up the global variables describing the current request. */ 1376 1377 static void setup_req_params( int drive ) 1378 { 1379 int block = ReqBlock + ReqCnt; 1380 1381 ReqTrack = block / UDT->spt; 1382 ReqSector = block - ReqTrack * UDT->spt + 1; 1383 ReqSide = ReqTrack & 1; 1384 ReqTrack >>= 1; 1385 ReqData = ReqBuffer + 512 * ReqCnt; 1386 1387 if (UseTrackbuffer) 1388 read_track = (ReqCmd == READ && fd_request->errors == 0); 1389 else 1390 read_track = 0; 1391 1392 DPRINT(("Request params: Si=%d Tr=%d Se=%d Data=%08lx\n",ReqSide, 1393 ReqTrack, ReqSector, (unsigned long)ReqData )); 1394 } 1395 1396 /* 1397 * Round-robin between our available drives, doing one request from each 1398 */ 1399 static struct request *set_next_request(void) 1400 { 1401 struct request_queue *q; 1402 int old_pos = fdc_queue; 1403 struct request *rq = NULL; 1404 1405 do { 1406 q = unit[fdc_queue].disk->queue; 1407 if (++fdc_queue == FD_MAX_UNITS) 1408 fdc_queue = 0; 1409 if (q) { 1410 rq = blk_fetch_request(q); 1411 if (rq) 1412 break; 1413 } 1414 } while (fdc_queue != old_pos); 1415 1416 return rq; 1417 } 1418 1419 1420 static void redo_fd_request(void) 1421 { 1422 int drive, type; 1423 struct atari_floppy_struct *floppy; 1424 1425 DPRINT(("redo_fd_request: fd_request=%p dev=%s fd_request->sector=%ld\n", 1426 fd_request, fd_request ? fd_request->rq_disk->disk_name : "", 1427 fd_request ? blk_rq_pos(fd_request) : 0 )); 1428 1429 IsFormatting = 0; 1430 1431 repeat: 1432 if (!fd_request) { 1433 fd_request = set_next_request(); 1434 if (!fd_request) 1435 goto the_end; 1436 } 1437 1438 floppy = fd_request->rq_disk->private_data; 1439 drive = floppy - unit; 1440 type = floppy->type; 1441 1442 if (!UD.connected) { 1443 /* drive not connected */ 1444 printk(KERN_ERR "Unknown Device: fd%d\n", drive ); 1445 fd_end_request_cur(-EIO); 1446 goto repeat; 1447 } 1448 1449 if (type == 0) { 1450 if (!UDT) { 1451 Probing = 1; 1452 UDT = atari_disk_type + StartDiskType[DriveType]; 1453 set_capacity(floppy->disk, UDT->blocks); 1454 UD.autoprobe = 1; 1455 } 1456 } 1457 else { 1458 /* user supplied disk type */ 1459 if (--type >= NUM_DISK_MINORS) { 1460 printk(KERN_WARNING "fd%d: invalid disk format", drive ); 1461 fd_end_request_cur(-EIO); 1462 goto repeat; 1463 } 1464 if (minor2disktype[type].drive_types > DriveType) { 1465 printk(KERN_WARNING "fd%d: unsupported disk format", drive ); 1466 fd_end_request_cur(-EIO); 1467 goto repeat; 1468 } 1469 type = minor2disktype[type].index; 1470 UDT = &atari_disk_type[type]; 1471 set_capacity(floppy->disk, UDT->blocks); 1472 UD.autoprobe = 0; 1473 } 1474 1475 if (blk_rq_pos(fd_request) + 1 > UDT->blocks) { 1476 fd_end_request_cur(-EIO); 1477 goto repeat; 1478 } 1479 1480 /* stop deselect timer */ 1481 del_timer( &motor_off_timer ); 1482 1483 ReqCnt = 0; 1484 ReqCmd = rq_data_dir(fd_request); 1485 ReqBlock = blk_rq_pos(fd_request); 1486 ReqBuffer = fd_request->buffer; 1487 setup_req_params( drive ); 1488 do_fd_action( drive ); 1489 1490 return; 1491 1492 the_end: 1493 finish_fdc(); 1494 } 1495 1496 1497 void do_fd_request(struct request_queue * q) 1498 { 1499 DPRINT(("do_fd_request for pid %d\n",current->pid)); 1500 while( fdc_busy ) sleep_on( &fdc_wait ); 1501 fdc_busy = 1; 1502 stdma_lock(floppy_irq, NULL); 1503 1504 atari_disable_irq( IRQ_MFP_FDC ); 1505 redo_fd_request(); 1506 atari_enable_irq( IRQ_MFP_FDC ); 1507 } 1508 1509 static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, 1510 unsigned int cmd, unsigned long param) 1511 { 1512 struct gendisk *disk = bdev->bd_disk; 1513 struct atari_floppy_struct *floppy = disk->private_data; 1514 int drive = floppy - unit; 1515 int type = floppy->type; 1516 struct atari_format_descr fmt_desc; 1517 struct atari_disk_type *dtp; 1518 struct floppy_struct getprm; 1519 int settype; 1520 struct floppy_struct setprm; 1521 void __user *argp = (void __user *)param; 1522 1523 switch (cmd) { 1524 case FDGETPRM: 1525 if (type) { 1526 if (--type >= NUM_DISK_MINORS) 1527 return -ENODEV; 1528 if (minor2disktype[type].drive_types > DriveType) 1529 return -ENODEV; 1530 type = minor2disktype[type].index; 1531 dtp = &atari_disk_type[type]; 1532 if (UD.flags & FTD_MSG) 1533 printk (KERN_ERR "floppy%d: found dtp %p name %s!\n", 1534 drive, dtp, dtp->name); 1535 } 1536 else { 1537 if (!UDT) 1538 return -ENXIO; 1539 else 1540 dtp = UDT; 1541 } 1542 memset((void *)&getprm, 0, sizeof(getprm)); 1543 getprm.size = dtp->blocks; 1544 getprm.sect = dtp->spt; 1545 getprm.head = 2; 1546 getprm.track = dtp->blocks/dtp->spt/2; 1547 getprm.stretch = dtp->stretch; 1548 if (copy_to_user(argp, &getprm, sizeof(getprm))) 1549 return -EFAULT; 1550 return 0; 1551 } 1552 switch (cmd) { 1553 case FDSETPRM: 1554 case FDDEFPRM: 1555 /* 1556 * MSch 7/96: simple 'set geometry' case: just set the 1557 * 'default' device params (minor == 0). 1558 * Currently, the drive geometry is cleared after each 1559 * disk change and subsequent revalidate()! simple 1560 * implementation of FDDEFPRM: save geometry from a 1561 * FDDEFPRM call and restore it in floppy_revalidate() ! 1562 */ 1563 1564 /* get the parameters from user space */ 1565 if (floppy->ref != 1 && floppy->ref != -1) 1566 return -EBUSY; 1567 if (copy_from_user(&setprm, argp, sizeof(setprm))) 1568 return -EFAULT; 1569 /* 1570 * first of all: check for floppy change and revalidate, 1571 * or the next access will revalidate - and clear UDT :-( 1572 */ 1573 1574 if (floppy_check_events(disk, 0)) 1575 floppy_revalidate(disk); 1576 1577 if (UD.flags & FTD_MSG) 1578 printk (KERN_INFO "floppy%d: setting size %d spt %d str %d!\n", 1579 drive, setprm.size, setprm.sect, setprm.stretch); 1580 1581 /* what if type > 0 here? Overwrite specified entry ? */ 1582 if (type) { 1583 /* refuse to re-set a predefined type for now */ 1584 redo_fd_request(); 1585 return -EINVAL; 1586 } 1587 1588 /* 1589 * type == 0: first look for a matching entry in the type list, 1590 * and set the UD.disktype field to use the perdefined entry. 1591 * TODO: add user-defined format to head of autoprobe list ? 1592 * Useful to include the user-type for future autodetection! 1593 */ 1594 1595 for (settype = 0; settype < NUM_DISK_MINORS; settype++) { 1596 int setidx = 0; 1597 if (minor2disktype[settype].drive_types > DriveType) { 1598 /* skip this one, invalid for drive ... */ 1599 continue; 1600 } 1601 setidx = minor2disktype[settype].index; 1602 dtp = &atari_disk_type[setidx]; 1603 1604 /* found matching entry ?? */ 1605 if ( dtp->blocks == setprm.size 1606 && dtp->spt == setprm.sect 1607 && dtp->stretch == setprm.stretch ) { 1608 if (UD.flags & FTD_MSG) 1609 printk (KERN_INFO "floppy%d: setting %s %p!\n", 1610 drive, dtp->name, dtp); 1611 UDT = dtp; 1612 set_capacity(floppy->disk, UDT->blocks); 1613 1614 if (cmd == FDDEFPRM) { 1615 /* save settings as permanent default type */ 1616 default_params[drive].name = dtp->name; 1617 default_params[drive].spt = dtp->spt; 1618 default_params[drive].blocks = dtp->blocks; 1619 default_params[drive].fdc_speed = dtp->fdc_speed; 1620 default_params[drive].stretch = dtp->stretch; 1621 } 1622 1623 return 0; 1624 } 1625 1626 } 1627 1628 /* no matching disk type found above - setting user_params */ 1629 1630 if (cmd == FDDEFPRM) { 1631 /* set permanent type */ 1632 dtp = &default_params[drive]; 1633 } else 1634 /* set user type (reset by disk change!) */ 1635 dtp = &user_params[drive]; 1636 1637 dtp->name = "user format"; 1638 dtp->blocks = setprm.size; 1639 dtp->spt = setprm.sect; 1640 if (setprm.sect > 14) 1641 dtp->fdc_speed = 3; 1642 else 1643 dtp->fdc_speed = 0; 1644 dtp->stretch = setprm.stretch; 1645 1646 if (UD.flags & FTD_MSG) 1647 printk (KERN_INFO "floppy%d: blk %d spt %d str %d!\n", 1648 drive, dtp->blocks, dtp->spt, dtp->stretch); 1649 1650 /* sanity check */ 1651 if (setprm.track != dtp->blocks/dtp->spt/2 || 1652 setprm.head != 2) { 1653 redo_fd_request(); 1654 return -EINVAL; 1655 } 1656 1657 UDT = dtp; 1658 set_capacity(floppy->disk, UDT->blocks); 1659 1660 return 0; 1661 case FDMSGON: 1662 UD.flags |= FTD_MSG; 1663 return 0; 1664 case FDMSGOFF: 1665 UD.flags &= ~FTD_MSG; 1666 return 0; 1667 case FDSETEMSGTRESH: 1668 return -EINVAL; 1669 case FDFMTBEG: 1670 return 0; 1671 case FDFMTTRK: 1672 if (floppy->ref != 1 && floppy->ref != -1) 1673 return -EBUSY; 1674 if (copy_from_user(&fmt_desc, argp, sizeof(fmt_desc))) 1675 return -EFAULT; 1676 return do_format(drive, type, &fmt_desc); 1677 case FDCLRPRM: 1678 UDT = NULL; 1679 /* MSch: invalidate default_params */ 1680 default_params[drive].blocks = 0; 1681 set_capacity(floppy->disk, MAX_DISK_SIZE * 2); 1682 case FDFMTEND: 1683 case FDFLUSH: 1684 /* invalidate the buffer track to force a reread */ 1685 BufferDrive = -1; 1686 set_bit(drive, &fake_change); 1687 check_disk_change(bdev); 1688 return 0; 1689 default: 1690 return -EINVAL; 1691 } 1692 } 1693 1694 static int fd_ioctl(struct block_device *bdev, fmode_t mode, 1695 unsigned int cmd, unsigned long arg) 1696 { 1697 int ret; 1698 1699 mutex_lock(&ataflop_mutex); 1700 ret = fd_locked_ioctl(bdev, mode, cmd, arg); 1701 mutex_unlock(&ataflop_mutex); 1702 1703 return ret; 1704 } 1705 1706 /* Initialize the 'unit' variable for drive 'drive' */ 1707 1708 static void __init fd_probe( int drive ) 1709 { 1710 UD.connected = 0; 1711 UDT = NULL; 1712 1713 if (!fd_test_drive_present( drive )) 1714 return; 1715 1716 UD.connected = 1; 1717 UD.track = 0; 1718 switch( UserSteprate[drive] ) { 1719 case 2: 1720 UD.steprate = FDCSTEP_2; 1721 break; 1722 case 3: 1723 UD.steprate = FDCSTEP_3; 1724 break; 1725 case 6: 1726 UD.steprate = FDCSTEP_6; 1727 break; 1728 case 12: 1729 UD.steprate = FDCSTEP_12; 1730 break; 1731 default: /* should be -1 for "not set by user" */ 1732 if (ATARIHW_PRESENT( FDCSPEED ) || MACH_IS_MEDUSA) 1733 UD.steprate = FDCSTEP_3; 1734 else 1735 UD.steprate = FDCSTEP_6; 1736 break; 1737 } 1738 MotorOn = 1; /* from probe restore operation! */ 1739 } 1740 1741 1742 /* This function tests the physical presence of a floppy drive (not 1743 * whether a disk is inserted). This is done by issuing a restore 1744 * command, waiting max. 2 seconds (that should be enough to move the 1745 * head across the whole disk) and looking at the state of the "TR00" 1746 * signal. This should now be raised if there is a drive connected 1747 * (and there is no hardware failure :-) Otherwise, the drive is 1748 * declared absent. 1749 */ 1750 1751 static int __init fd_test_drive_present( int drive ) 1752 { 1753 unsigned long timeout; 1754 unsigned char status; 1755 int ok; 1756 1757 if (drive >= (MACH_IS_FALCON ? 1 : 2)) return( 0 ); 1758 fd_select_drive( drive ); 1759 1760 /* disable interrupt temporarily */ 1761 atari_turnoff_irq( IRQ_MFP_FDC ); 1762 FDC_WRITE (FDCREG_TRACK, 0xff00); 1763 FDC_WRITE( FDCREG_CMD, FDCCMD_RESTORE | FDCCMDADD_H | FDCSTEP_6 ); 1764 1765 timeout = jiffies + 2*HZ+HZ/2; 1766 while (time_before(jiffies, timeout)) 1767 if (!(st_mfp.par_dt_reg & 0x20)) 1768 break; 1769 1770 status = FDC_READ( FDCREG_STATUS ); 1771 ok = (status & FDCSTAT_TR00) != 0; 1772 1773 /* force interrupt to abort restore operation (FDC would try 1774 * about 50 seconds!) */ 1775 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); 1776 udelay(500); 1777 status = FDC_READ( FDCREG_STATUS ); 1778 udelay(20); 1779 1780 if (ok) { 1781 /* dummy seek command to make WP bit accessible */ 1782 FDC_WRITE( FDCREG_DATA, 0 ); 1783 FDC_WRITE( FDCREG_CMD, FDCCMD_SEEK ); 1784 while( st_mfp.par_dt_reg & 0x20 ) 1785 ; 1786 status = FDC_READ( FDCREG_STATUS ); 1787 } 1788 1789 atari_turnon_irq( IRQ_MFP_FDC ); 1790 return( ok ); 1791 } 1792 1793 1794 /* Look how many and which kind of drives are connected. If there are 1795 * floppies, additionally start the disk-change and motor-off timers. 1796 */ 1797 1798 static void __init config_types( void ) 1799 { 1800 int drive, cnt = 0; 1801 1802 /* for probing drives, set the FDC speed to 8 MHz */ 1803 if (ATARIHW_PRESENT(FDCSPEED)) 1804 dma_wd.fdc_speed = 0; 1805 1806 printk(KERN_INFO "Probing floppy drive(s):\n"); 1807 for( drive = 0; drive < FD_MAX_UNITS; drive++ ) { 1808 fd_probe( drive ); 1809 if (UD.connected) { 1810 printk(KERN_INFO "fd%d\n", drive); 1811 ++cnt; 1812 } 1813 } 1814 1815 if (FDC_READ( FDCREG_STATUS ) & FDCSTAT_BUSY) { 1816 /* If FDC is still busy from probing, give it another FORCI 1817 * command to abort the operation. If this isn't done, the FDC 1818 * will interrupt later and its IRQ line stays low, because 1819 * the status register isn't read. And this will block any 1820 * interrupts on this IRQ line :-( 1821 */ 1822 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); 1823 udelay(500); 1824 FDC_READ( FDCREG_STATUS ); 1825 udelay(20); 1826 } 1827 1828 if (cnt > 0) { 1829 start_motor_off_timer(); 1830 if (cnt == 1) fd_select_drive( 0 ); 1831 start_check_change_timer(); 1832 } 1833 } 1834 1835 /* 1836 * floppy_open check for aliasing (/dev/fd0 can be the same as 1837 * /dev/PS0 etc), and disallows simultaneous access to the same 1838 * drive with different device numbers. 1839 */ 1840 1841 static int floppy_open(struct block_device *bdev, fmode_t mode) 1842 { 1843 struct atari_floppy_struct *p = bdev->bd_disk->private_data; 1844 int type = MINOR(bdev->bd_dev) >> 2; 1845 1846 DPRINT(("fd_open: type=%d\n",type)); 1847 if (p->ref && p->type != type) 1848 return -EBUSY; 1849 1850 if (p->ref == -1 || (p->ref && mode & FMODE_EXCL)) 1851 return -EBUSY; 1852 1853 if (mode & FMODE_EXCL) 1854 p->ref = -1; 1855 else 1856 p->ref++; 1857 1858 p->type = type; 1859 1860 if (mode & FMODE_NDELAY) 1861 return 0; 1862 1863 if (mode & (FMODE_READ|FMODE_WRITE)) { 1864 check_disk_change(bdev); 1865 if (mode & FMODE_WRITE) { 1866 if (p->wpstat) { 1867 if (p->ref < 0) 1868 p->ref = 0; 1869 else 1870 p->ref--; 1871 return -EROFS; 1872 } 1873 } 1874 } 1875 return 0; 1876 } 1877 1878 static int floppy_unlocked_open(struct block_device *bdev, fmode_t mode) 1879 { 1880 int ret; 1881 1882 mutex_lock(&ataflop_mutex); 1883 ret = floppy_open(bdev, mode); 1884 mutex_unlock(&ataflop_mutex); 1885 1886 return ret; 1887 } 1888 1889 static void floppy_release(struct gendisk *disk, fmode_t mode) 1890 { 1891 struct atari_floppy_struct *p = disk->private_data; 1892 mutex_lock(&ataflop_mutex); 1893 if (p->ref < 0) 1894 p->ref = 0; 1895 else if (!p->ref--) { 1896 printk(KERN_ERR "floppy_release with fd_ref == 0"); 1897 p->ref = 0; 1898 } 1899 mutex_unlock(&ataflop_mutex); 1900 } 1901 1902 static const struct block_device_operations floppy_fops = { 1903 .owner = THIS_MODULE, 1904 .open = floppy_unlocked_open, 1905 .release = floppy_release, 1906 .ioctl = fd_ioctl, 1907 .check_events = floppy_check_events, 1908 .revalidate_disk= floppy_revalidate, 1909 }; 1910 1911 static struct kobject *floppy_find(dev_t dev, int *part, void *data) 1912 { 1913 int drive = *part & 3; 1914 int type = *part >> 2; 1915 if (drive >= FD_MAX_UNITS || type > NUM_DISK_MINORS) 1916 return NULL; 1917 *part = 0; 1918 return get_disk(unit[drive].disk); 1919 } 1920 1921 static int __init atari_floppy_init (void) 1922 { 1923 int i; 1924 1925 if (!MACH_IS_ATARI) 1926 /* Amiga, Mac, ... don't have Atari-compatible floppy :-) */ 1927 return -ENODEV; 1928 1929 if (register_blkdev(FLOPPY_MAJOR,"fd")) 1930 return -EBUSY; 1931 1932 for (i = 0; i < FD_MAX_UNITS; i++) { 1933 unit[i].disk = alloc_disk(1); 1934 if (!unit[i].disk) 1935 goto Enomem; 1936 } 1937 1938 if (UseTrackbuffer < 0) 1939 /* not set by user -> use default: for now, we turn 1940 track buffering off for all Medusas, though it 1941 could be used with ones that have a counter 1942 card. But the test is too hard :-( */ 1943 UseTrackbuffer = !MACH_IS_MEDUSA; 1944 1945 /* initialize variables */ 1946 SelectedDrive = -1; 1947 BufferDrive = -1; 1948 1949 DMABuffer = atari_stram_alloc(BUFFER_SIZE+512, "ataflop"); 1950 if (!DMABuffer) { 1951 printk(KERN_ERR "atari_floppy_init: cannot get dma buffer\n"); 1952 goto Enomem; 1953 } 1954 TrackBuffer = DMABuffer + 512; 1955 PhysDMABuffer = virt_to_phys(DMABuffer); 1956 PhysTrackBuffer = virt_to_phys(TrackBuffer); 1957 BufferDrive = BufferSide = BufferTrack = -1; 1958 1959 for (i = 0; i < FD_MAX_UNITS; i++) { 1960 unit[i].track = -1; 1961 unit[i].flags = 0; 1962 unit[i].disk->major = FLOPPY_MAJOR; 1963 unit[i].disk->first_minor = i; 1964 sprintf(unit[i].disk->disk_name, "fd%d", i); 1965 unit[i].disk->fops = &floppy_fops; 1966 unit[i].disk->private_data = &unit[i]; 1967 unit[i].disk->queue = blk_init_queue(do_fd_request, 1968 &ataflop_lock); 1969 if (!unit[i].disk->queue) 1970 goto Enomem; 1971 set_capacity(unit[i].disk, MAX_DISK_SIZE * 2); 1972 add_disk(unit[i].disk); 1973 } 1974 1975 blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE, 1976 floppy_find, NULL, NULL); 1977 1978 printk(KERN_INFO "Atari floppy driver: max. %cD, %strack buffering\n", 1979 DriveType == 0 ? 'D' : DriveType == 1 ? 'H' : 'E', 1980 UseTrackbuffer ? "" : "no "); 1981 config_types(); 1982 1983 return 0; 1984 Enomem: 1985 while (i--) { 1986 struct request_queue *q = unit[i].disk->queue; 1987 1988 put_disk(unit[i].disk); 1989 if (q) 1990 blk_cleanup_queue(q); 1991 } 1992 1993 unregister_blkdev(FLOPPY_MAJOR, "fd"); 1994 return -ENOMEM; 1995 } 1996 1997 #ifndef MODULE 1998 static int __init atari_floppy_setup(char *str) 1999 { 2000 int ints[3 + FD_MAX_UNITS]; 2001 int i; 2002 2003 if (!MACH_IS_ATARI) 2004 return 0; 2005 2006 str = get_options(str, 3 + FD_MAX_UNITS, ints); 2007 2008 if (ints[0] < 1) { 2009 printk(KERN_ERR "ataflop_setup: no arguments!\n" ); 2010 return 0; 2011 } 2012 else if (ints[0] > 2+FD_MAX_UNITS) { 2013 printk(KERN_ERR "ataflop_setup: too many arguments\n" ); 2014 } 2015 2016 if (ints[1] < 0 || ints[1] > 2) 2017 printk(KERN_ERR "ataflop_setup: bad drive type\n" ); 2018 else 2019 DriveType = ints[1]; 2020 2021 if (ints[0] >= 2) 2022 UseTrackbuffer = (ints[2] > 0); 2023 2024 for( i = 3; i <= ints[0] && i-3 < FD_MAX_UNITS; ++i ) { 2025 if (ints[i] != 2 && ints[i] != 3 && ints[i] != 6 && ints[i] != 12) 2026 printk(KERN_ERR "ataflop_setup: bad steprate\n" ); 2027 else 2028 UserSteprate[i-3] = ints[i]; 2029 } 2030 return 1; 2031 } 2032 2033 __setup("floppy=", atari_floppy_setup); 2034 #endif 2035 2036 static void __exit atari_floppy_exit(void) 2037 { 2038 int i; 2039 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); 2040 for (i = 0; i < FD_MAX_UNITS; i++) { 2041 struct request_queue *q = unit[i].disk->queue; 2042 2043 del_gendisk(unit[i].disk); 2044 put_disk(unit[i].disk); 2045 blk_cleanup_queue(q); 2046 } 2047 unregister_blkdev(FLOPPY_MAJOR, "fd"); 2048 2049 del_timer_sync(&fd_timer); 2050 atari_stram_free( DMABuffer ); 2051 } 2052 2053 module_init(atari_floppy_init) 2054 module_exit(atari_floppy_exit) 2055 2056 MODULE_LICENSE("GPL"); 2057