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