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