1/* 2 * drivers/block/ataflop.c 3 * 4 * Copyright (C) 1993 Greg Harp 5 * Atari Support by Bjoern Brauel, Roman Hodek 6 * 7 * Big cleanup Sep 11..14 1994 Roman Hodek: 8 * - Driver now works interrupt driven 9 * - Support for two drives; should work, but I cannot test that :-( 10 * - Reading is done in whole tracks and buffered to speed up things 11 * - Disk change detection and drive deselecting after motor-off 12 * similar to TOS 13 * - Autodetection of disk format (DD/HD); untested yet, because I 14 * don't have an HD drive :-( 15 * 16 * Fixes Nov 13 1994 Martin Schaller: 17 * - Autodetection works now 18 * - Support for 5 1/4'' disks 19 * - Removed drive type (unknown on atari) 20 * - Do seeks with 8 Mhz 21 * 22 * Changes by Andreas Schwab: 23 * - After errors in multiple read mode try again reading single sectors 24 * (Feb 1995): 25 * - Clean up error handling 26 * - Set blk_size for proper size checking 27 * - Initialize track register when testing presence of floppy 28 * - Implement some ioctl's 29 * 30 * Changes by Torsten Lang: 31 * - When probing the floppies we should add the FDCCMDADD_H flag since 32 * the FDC will otherwise wait forever when no disk is inserted... 33 * 34 * ++ Freddi Aschwanden (fa) 20.9.95 fixes for medusa: 35 * - MFPDELAY() after each FDC access -> atari 36 * - more/other disk formats 37 * - DMA to the block buffer directly if we have a 32bit DMA 38 * - for medusa, the step rate is always 3ms 39 * - on medusa, use only cache_push() 40 * Roman: 41 * - Make disk format numbering independent from minors 42 * - Let user set max. supported drive type (speeds up format 43 * detection, saves buffer space) 44 * 45 * Roman 10/15/95: 46 * - implement some more ioctls 47 * - disk formatting 48 * 49 * Andreas 95/12/12: 50 * - increase gap size at start of track for HD/ED disks 51 * 52 * Michael (MSch) 11/07/96: 53 * - implemented FDSETPRM and FDDEFPRM ioctl 54 * 55 * Andreas (97/03/19): 56 * - implemented missing BLK* ioctls 57 * 58 * Things left to do: 59 * - Formatting 60 * - Maybe a better strategy for disk change detection (does anyone 61 * know one?) 62 */ 63 64#include <linux/module.h> 65 66#include <linux/fd.h> 67#include <linux/delay.h> 68#include <linux/init.h> 69#include <linux/blkdev.h> 70#include <linux/mutex.h> 71#include <linux/completion.h> 72#include <linux/wait.h> 73 74#include <asm/atafd.h> 75#include <asm/atafdreg.h> 76#include <asm/atariints.h> 77#include <asm/atari_stdma.h> 78#include <asm/atari_stram.h> 79 80#define FD_MAX_UNITS 2 81 82#undef DEBUG 83 84static DEFINE_MUTEX(ataflop_mutex); 85static struct request *fd_request; 86static int fdc_queue; 87 88/* Disk types: DD, HD, ED */ 89static struct atari_disk_type { 90 const char *name; 91 unsigned spt; /* sectors per track */ 92 unsigned blocks; /* total number of blocks */ 93 unsigned fdc_speed; /* fdc_speed setting */ 94 unsigned stretch; /* track doubling ? */ 95} atari_disk_type[] = { 96 { "d360", 9, 720, 0, 0}, /* 0: 360kB diskette */ 97 { "D360", 9, 720, 0, 1}, /* 1: 360kb in 720k or 1.2MB drive */ 98 { "D720", 9,1440, 0, 0}, /* 2: 720kb in 720k or 1.2MB drive */ 99 { "D820", 10,1640, 0, 0}, /* 3: DD disk with 82 tracks/10 sectors */ 100/* formats above are probed for type DD */ 101#define MAX_TYPE_DD 3 102 { "h1200",15,2400, 3, 0}, /* 4: 1.2MB diskette */ 103 { "H1440",18,2880, 3, 0}, /* 5: 1.4 MB diskette (HD) */ 104 { "H1640",20,3280, 3, 0}, /* 6: 1.64MB diskette (fat HD) 82 tr 20 sec */ 105/* formats above are probed for types DD and HD */ 106#define MAX_TYPE_HD 6 107 { "E2880",36,5760, 3, 0}, /* 7: 2.8 MB diskette (ED) */ 108 { "E3280",40,6560, 3, 0}, /* 8: 3.2 MB diskette (fat ED) 82 tr 40 sec */ 109/* formats above are probed for types DD, HD and ED */ 110#define MAX_TYPE_ED 8 111/* types below are never autoprobed */ 112 { "H1680",21,3360, 3, 0}, /* 9: 1.68MB diskette (fat HD) 80 tr 21 sec */ 113 { "h410",10,820, 0, 1}, /* 10: 410k diskette 41 tr 10 sec, stretch */ 114 { "h1476",18,2952, 3, 0}, /* 11: 1.48MB diskette 82 tr 18 sec */ 115 { "H1722",21,3444, 3, 0}, /* 12: 1.72MB diskette 82 tr 21 sec */ 116 { "h420",10,840, 0, 1}, /* 13: 420k diskette 42 tr 10 sec, stretch */ 117 { "H830",10,1660, 0, 0}, /* 14: 820k diskette 83 tr 10 sec */ 118 { "h1494",18,2952, 3, 0}, /* 15: 1.49MB diskette 83 tr 18 sec */ 119 { "H1743",21,3486, 3, 0}, /* 16: 1.74MB diskette 83 tr 21 sec */ 120 { "h880",11,1760, 0, 0}, /* 17: 880k diskette 80 tr 11 sec */ 121 { "D1040",13,2080, 0, 0}, /* 18: 1.04MB diskette 80 tr 13 sec */ 122 { "D1120",14,2240, 0, 0}, /* 19: 1.12MB diskette 80 tr 14 sec */ 123 { "h1600",20,3200, 3, 0}, /* 20: 1.60MB diskette 80 tr 20 sec */ 124 { "H1760",22,3520, 3, 0}, /* 21: 1.76MB diskette 80 tr 22 sec */ 125 { "H1920",24,3840, 3, 0}, /* 22: 1.92MB diskette 80 tr 24 sec */ 126 { "E3200",40,6400, 3, 0}, /* 23: 3.2MB diskette 80 tr 40 sec */ 127 { "E3520",44,7040, 3, 0}, /* 24: 3.52MB diskette 80 tr 44 sec */ 128 { "E3840",48,7680, 3, 0}, /* 25: 3.84MB diskette 80 tr 48 sec */ 129 { "H1840",23,3680, 3, 0}, /* 26: 1.84MB diskette 80 tr 23 sec */ 130 { "D800",10,1600, 0, 0}, /* 27: 800k diskette 80 tr 10 sec */ 131}; 132 133static int StartDiskType[] = { 134 MAX_TYPE_DD, 135 MAX_TYPE_HD, 136 MAX_TYPE_ED 137}; 138 139#define TYPE_DD 0 140#define TYPE_HD 1 141#define TYPE_ED 2 142 143static int DriveType = TYPE_HD; 144 145static DEFINE_SPINLOCK(ataflop_lock); 146 147/* Array for translating minors into disk formats */ 148static struct { 149 int index; 150 unsigned drive_types; 151} minor2disktype[] = { 152 { 0, TYPE_DD }, /* 1: d360 */ 153 { 4, TYPE_HD }, /* 2: h1200 */ 154 { 1, TYPE_DD }, /* 3: D360 */ 155 { 2, TYPE_DD }, /* 4: D720 */ 156 { 1, TYPE_DD }, /* 5: h360 = D360 */ 157 { 2, TYPE_DD }, /* 6: h720 = D720 */ 158 { 5, TYPE_HD }, /* 7: H1440 */ 159 { 7, TYPE_ED }, /* 8: E2880 */ 160/* some PC formats :-) */ 161 { 8, TYPE_ED }, /* 9: E3280 <- was "CompaQ" == E2880 for PC */ 162 { 5, TYPE_HD }, /* 10: h1440 = H1440 */ 163 { 9, TYPE_HD }, /* 11: H1680 */ 164 { 10, TYPE_DD }, /* 12: h410 */ 165 { 3, TYPE_DD }, /* 13: H820 <- == D820, 82x10 */ 166 { 11, TYPE_HD }, /* 14: h1476 */ 167 { 12, TYPE_HD }, /* 15: H1722 */ 168 { 13, TYPE_DD }, /* 16: h420 */ 169 { 14, TYPE_DD }, /* 17: H830 */ 170 { 15, TYPE_HD }, /* 18: h1494 */ 171 { 16, TYPE_HD }, /* 19: H1743 */ 172 { 17, TYPE_DD }, /* 20: h880 */ 173 { 18, TYPE_DD }, /* 21: D1040 */ 174 { 19, TYPE_DD }, /* 22: D1120 */ 175 { 20, TYPE_HD }, /* 23: h1600 */ 176 { 21, TYPE_HD }, /* 24: H1760 */ 177 { 22, TYPE_HD }, /* 25: H1920 */ 178 { 23, TYPE_ED }, /* 26: E3200 */ 179 { 24, TYPE_ED }, /* 27: E3520 */ 180 { 25, TYPE_ED }, /* 28: E3840 */ 181 { 26, TYPE_HD }, /* 29: H1840 */ 182 { 27, TYPE_DD }, /* 30: D800 */ 183 { 6, TYPE_HD }, /* 31: H1640 <- was H1600 == h1600 for PC */ 184}; 185 186#define NUM_DISK_MINORS ARRAY_SIZE(minor2disktype) 187 188/* 189 * Maximum disk size (in kilobytes). This default is used whenever the 190 * current disk size is unknown. 191 */ 192#define MAX_DISK_SIZE 3280 193 194/* 195 * MSch: User-provided type information. 'drive' points to 196 * the respective entry of this array. Set by FDSETPRM ioctls. 197 */ 198static struct atari_disk_type user_params[FD_MAX_UNITS]; 199 200/* 201 * User-provided permanent type information. 'drive' points to 202 * the respective entry of this array. Set by FDDEFPRM ioctls, 203 * restored upon disk change by floppy_revalidate() if valid (as seen by 204 * default_params[].blocks > 0 - a bit in unit[].flags might be used for this?) 205 */ 206static struct atari_disk_type default_params[FD_MAX_UNITS]; 207 208/* current info on each unit */ 209static struct atari_floppy_struct { 210 int connected; /* !=0 : drive is connected */ 211 int autoprobe; /* !=0 : do autoprobe */ 212 213 struct atari_disk_type *disktype; /* current type of disk */ 214 215 int track; /* current head position or -1 if 216 unknown */ 217 unsigned int steprate; /* steprate setting */ 218 unsigned int wpstat; /* current state of WP signal (for 219 disk change detection) */ 220 int flags; /* flags */ 221 struct gendisk *disk; 222 int ref; 223 int type; 224} unit[FD_MAX_UNITS]; 225 226#define UD unit[drive] 227#define UDT unit[drive].disktype 228#define SUD unit[SelectedDrive] 229#define SUDT unit[SelectedDrive].disktype 230 231 232#define FDC_READ(reg) ({ \ 233 /* unsigned long __flags; */ \ 234 unsigned short __val; \ 235 /* local_irq_save(__flags); */ \ 236 dma_wd.dma_mode_status = 0x80 | (reg); \ 237 udelay(25); \ 238 __val = dma_wd.fdc_acces_seccount; \ 239 MFPDELAY(); \ 240 /* local_irq_restore(__flags); */ \ 241 __val & 0xff; \ 242}) 243 244#define FDC_WRITE(reg,val) \ 245 do { \ 246 /* unsigned long __flags; */ \ 247 /* local_irq_save(__flags); */ \ 248 dma_wd.dma_mode_status = 0x80 | (reg); \ 249 udelay(25); \ 250 dma_wd.fdc_acces_seccount = (val); \ 251 MFPDELAY(); \ 252 /* local_irq_restore(__flags); */ \ 253 } while(0) 254 255 256/* Buffering variables: 257 * First, there is a DMA buffer in ST-RAM that is used for floppy DMA 258 * operations. Second, a track buffer is used to cache a whole track 259 * of the disk to save read operations. These are two separate buffers 260 * because that allows write operations without clearing the track buffer. 261 */ 262 263static int MaxSectors[] = { 264 11, 22, 44 265}; 266static int BufferSize[] = { 267 15*512, 30*512, 60*512 268}; 269 270#define BUFFER_SIZE (BufferSize[DriveType]) 271 272unsigned char *DMABuffer; /* buffer for writes */ 273static unsigned long PhysDMABuffer; /* physical address */ 274 275static int UseTrackbuffer = -1; /* Do track buffering? */ 276module_param(UseTrackbuffer, int, 0); 277 278unsigned char *TrackBuffer; /* buffer for reads */ 279static unsigned long PhysTrackBuffer; /* physical address */ 280static int BufferDrive, BufferSide, BufferTrack; 281static int read_track; /* non-zero if we are reading whole tracks */ 282 283#define SECTOR_BUFFER(sec) (TrackBuffer + ((sec)-1)*512) 284#define IS_BUFFERED(drive,side,track) \ 285 (BufferDrive == (drive) && BufferSide == (side) && BufferTrack == (track)) 286 287/* 288 * These are global variables, as that's the easiest way to give 289 * information to interrupts. They are the data used for the current 290 * request. 291 */ 292static int SelectedDrive = 0; 293static int ReqCmd, ReqBlock; 294static int ReqSide, ReqTrack, ReqSector, ReqCnt; 295static int HeadSettleFlag = 0; 296static unsigned char *ReqData, *ReqBuffer; 297static int MotorOn = 0, MotorOffTrys; 298static int IsFormatting = 0, FormatError; 299 300static int UserSteprate[FD_MAX_UNITS] = { -1, -1 }; 301module_param_array(UserSteprate, int, NULL, 0); 302 303/* Synchronization of FDC access. */ 304static volatile int fdc_busy = 0; 305static DECLARE_WAIT_QUEUE_HEAD(fdc_wait); 306static DECLARE_COMPLETION(format_wait); 307 308static unsigned long changed_floppies = 0xff, fake_change = 0; 309#define CHECK_CHANGE_DELAY HZ/2 310 311#define FD_MOTOR_OFF_DELAY (3*HZ) 312#define FD_MOTOR_OFF_MAXTRY (10*20) 313 314#define FLOPPY_TIMEOUT (6*HZ) 315#define RECALIBRATE_ERRORS 4 /* After this many errors the drive 316 * will be recalibrated. */ 317#define MAX_ERRORS 8 /* After this many errors the driver 318 * will give up. */ 319 320 321/* 322 * The driver is trying to determine the correct media format 323 * while Probing is set. fd_rwsec_done() clears it after a 324 * successful access. 325 */ 326static int Probing = 0; 327 328/* This flag is set when a dummy seek is necessary to make the WP 329 * status bit accessible. 330 */ 331static int NeedSeek = 0; 332 333 334#ifdef DEBUG 335#define DPRINT(a) printk a 336#else 337#define DPRINT(a) 338#endif 339 340/***************************** Prototypes *****************************/ 341 342static void fd_select_side( int side ); 343static void fd_select_drive( int drive ); 344static void fd_deselect( void ); 345static void fd_motor_off_timer( unsigned long dummy ); 346static void check_change( unsigned long dummy ); 347static irqreturn_t floppy_irq (int irq, void *dummy); 348static void fd_error( void ); 349static int do_format(int drive, int type, struct atari_format_descr *desc); 350static void do_fd_action( int drive ); 351static void fd_calibrate( void ); 352static void fd_calibrate_done( int status ); 353static void fd_seek( void ); 354static void fd_seek_done( int status ); 355static void fd_rwsec( void ); 356static void fd_readtrack_check( unsigned long dummy ); 357static void fd_rwsec_done( int status ); 358static void fd_rwsec_done1(int status); 359static void fd_writetrack( void ); 360static void fd_writetrack_done( int status ); 361static void fd_times_out( unsigned long dummy ); 362static void finish_fdc( void ); 363static void finish_fdc_done( int dummy ); 364static void setup_req_params( int drive ); 365static void redo_fd_request( void); 366static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int 367 cmd, unsigned long param); 368static void fd_probe( int drive ); 369static int fd_test_drive_present( int drive ); 370static void config_types( void ); 371static int floppy_open(struct block_device *bdev, fmode_t mode); 372static void floppy_release(struct gendisk *disk, fmode_t mode); 373 374/************************* End of Prototypes **************************/ 375 376static DEFINE_TIMER(motor_off_timer, fd_motor_off_timer, 0, 0); 377static DEFINE_TIMER(readtrack_timer, fd_readtrack_check, 0, 0); 378static DEFINE_TIMER(timeout_timer, fd_times_out, 0, 0); 379static DEFINE_TIMER(fd_timer, check_change, 0, 0); 380 381static void fd_end_request_cur(int err) 382{ 383 if (!__blk_end_request_cur(fd_request, err)) 384 fd_request = NULL; 385} 386 387static inline void start_motor_off_timer(void) 388{ 389 mod_timer(&motor_off_timer, jiffies + FD_MOTOR_OFF_DELAY); 390 MotorOffTrys = 0; 391} 392 393static inline void start_check_change_timer( void ) 394{ 395 mod_timer(&fd_timer, jiffies + CHECK_CHANGE_DELAY); 396} 397 398static inline void start_timeout(void) 399{ 400 mod_timer(&timeout_timer, jiffies + FLOPPY_TIMEOUT); 401} 402 403static inline void stop_timeout(void) 404{ 405 del_timer(&timeout_timer); 406} 407 408/* Select the side to use. */ 409 410static void fd_select_side( int side ) 411{ 412 unsigned long flags; 413 414 /* protect against various other ints mucking around with the PSG */ 415 local_irq_save(flags); 416 417 sound_ym.rd_data_reg_sel = 14; /* Select PSG Port A */ 418 sound_ym.wd_data = (side == 0) ? sound_ym.rd_data_reg_sel | 0x01 : 419 sound_ym.rd_data_reg_sel & 0xfe; 420 421 local_irq_restore(flags); 422} 423 424 425/* Select a drive, update the FDC's track register and set the correct 426 * clock speed for this disk's type. 427 */ 428 429static void fd_select_drive( int drive ) 430{ 431 unsigned long flags; 432 unsigned char tmp; 433 434 if (drive == SelectedDrive) 435 return; 436 437 /* protect against various other ints mucking around with the PSG */ 438 local_irq_save(flags); 439 sound_ym.rd_data_reg_sel = 14; /* Select PSG Port A */ 440 tmp = sound_ym.rd_data_reg_sel; 441 sound_ym.wd_data = (tmp | DSKDRVNONE) & ~(drive == 0 ? DSKDRV0 : DSKDRV1); 442 atari_dont_touch_floppy_select = 1; 443 local_irq_restore(flags); 444 445 /* restore track register to saved value */ 446 FDC_WRITE( FDCREG_TRACK, UD.track ); 447 udelay(25); 448 449 /* select 8/16 MHz */ 450 if (UDT) 451 if (ATARIHW_PRESENT(FDCSPEED)) 452 dma_wd.fdc_speed = UDT->fdc_speed; 453 454 SelectedDrive = drive; 455} 456 457 458/* Deselect both drives. */ 459 460static void fd_deselect( void ) 461{ 462 unsigned long flags; 463 464 /* protect against various other ints mucking around with the PSG */ 465 local_irq_save(flags); 466 atari_dont_touch_floppy_select = 0; 467 sound_ym.rd_data_reg_sel=14; /* Select PSG Port A */ 468 sound_ym.wd_data = (sound_ym.rd_data_reg_sel | 469 (MACH_IS_FALCON ? 3 : 7)); /* no drives selected */ 470 /* On Falcon, the drive B select line is used on the printer port, so 471 * leave it alone... */ 472 SelectedDrive = -1; 473 local_irq_restore(flags); 474} 475 476 477/* This timer function deselects the drives when the FDC switched the 478 * motor off. The deselection cannot happen earlier because the FDC 479 * counts the index signals, which arrive only if one drive is selected. 480 */ 481 482static void fd_motor_off_timer( unsigned long dummy ) 483{ 484 unsigned char status; 485 486 if (SelectedDrive < 0) 487 /* no drive selected, needn't deselect anyone */ 488 return; 489 490 if (stdma_islocked()) 491 goto retry; 492 493 status = FDC_READ( FDCREG_STATUS ); 494 495 if (!(status & 0x80)) { 496 /* motor already turned off by FDC -> deselect drives */ 497 MotorOn = 0; 498 fd_deselect(); 499 return; 500 } 501 /* not yet off, try again */ 502 503 retry: 504 /* Test again later; if tested too often, it seems there is no disk 505 * in the drive and the FDC will leave the motor on forever (or, 506 * at least until a disk is inserted). So we'll test only twice 507 * per second from then on... 508 */ 509 mod_timer(&motor_off_timer, 510 jiffies + (MotorOffTrys++ < FD_MOTOR_OFF_MAXTRY ? HZ/20 : HZ/2)); 511} 512 513 514/* This function is repeatedly called to detect disk changes (as good 515 * as possible) and keep track of the current state of the write protection. 516 */ 517 518static void check_change( unsigned long dummy ) 519{ 520 static int drive = 0; 521 522 unsigned long flags; 523 unsigned char old_porta; 524 int stat; 525 526 if (++drive > 1 || !UD.connected) 527 drive = 0; 528 529 /* protect against various other ints mucking around with the PSG */ 530 local_irq_save(flags); 531 532 if (!stdma_islocked()) { 533 sound_ym.rd_data_reg_sel = 14; 534 old_porta = sound_ym.rd_data_reg_sel; 535 sound_ym.wd_data = (old_porta | DSKDRVNONE) & 536 ~(drive == 0 ? DSKDRV0 : DSKDRV1); 537 stat = !!(FDC_READ( FDCREG_STATUS ) & FDCSTAT_WPROT); 538 sound_ym.wd_data = old_porta; 539 540 if (stat != UD.wpstat) { 541 DPRINT(( "wpstat[%d] = %d\n", drive, stat )); 542 UD.wpstat = stat; 543 set_bit (drive, &changed_floppies); 544 } 545 } 546 local_irq_restore(flags); 547 548 start_check_change_timer(); 549} 550 551 552/* Handling of the Head Settling Flag: This flag should be set after each 553 * seek operation, because we don't use seeks with verify. 554 */ 555 556static inline void set_head_settle_flag(void) 557{ 558 HeadSettleFlag = FDCCMDADD_E; 559} 560 561static inline int get_head_settle_flag(void) 562{ 563 int tmp = HeadSettleFlag; 564 HeadSettleFlag = 0; 565 return( tmp ); 566} 567 568static inline void copy_buffer(void *from, void *to) 569{ 570 ulong *p1 = (ulong *)from, *p2 = (ulong *)to; 571 int cnt; 572 573 for (cnt = 512/4; cnt; cnt--) 574 *p2++ = *p1++; 575} 576 577 578 579 580/* General Interrupt Handling */ 581 582static void (*FloppyIRQHandler)( int status ) = NULL; 583 584static irqreturn_t floppy_irq (int irq, void *dummy) 585{ 586 unsigned char status; 587 void (*handler)( int ); 588 589 handler = xchg(&FloppyIRQHandler, NULL); 590 591 if (handler) { 592 nop(); 593 status = FDC_READ( FDCREG_STATUS ); 594 DPRINT(("FDC irq, status = %02x handler = %08lx\n",status,(unsigned long)handler)); 595 handler( status ); 596 } 597 else { 598 DPRINT(("FDC irq, no handler\n")); 599 } 600 return IRQ_HANDLED; 601} 602 603 604/* Error handling: If some error happened, retry some times, then 605 * recalibrate, then try again, and fail after MAX_ERRORS. 606 */ 607 608static void fd_error( void ) 609{ 610 if (IsFormatting) { 611 IsFormatting = 0; 612 FormatError = 1; 613 complete(&format_wait); 614 return; 615 } 616 617 if (!fd_request) 618 return; 619 620 fd_request->errors++; 621 if (fd_request->errors >= MAX_ERRORS) { 622 printk(KERN_ERR "fd%d: too many errors.\n", SelectedDrive ); 623 fd_end_request_cur(-EIO); 624 } 625 else if (fd_request->errors == RECALIBRATE_ERRORS) { 626 printk(KERN_WARNING "fd%d: recalibrating\n", SelectedDrive ); 627 if (SelectedDrive != -1) 628 SUD.track = -1; 629 } 630 redo_fd_request(); 631} 632 633 634 635#define SET_IRQ_HANDLER(proc) do { FloppyIRQHandler = (proc); } while(0) 636 637 638/* ---------- Formatting ---------- */ 639 640#define FILL(n,val) \ 641 do { \ 642 memset( p, val, n ); \ 643 p += n; \ 644 } while(0) 645 646static int do_format(int drive, int type, struct atari_format_descr *desc) 647{ 648 unsigned char *p; 649 int sect, nsect; 650 unsigned long flags; 651 652 DPRINT(("do_format( dr=%d tr=%d he=%d offs=%d )\n", 653 drive, desc->track, desc->head, desc->sect_offset )); 654 655 wait_event(fdc_wait, cmpxchg(&fdc_busy, 0, 1) == 0); 656 local_irq_save(flags); 657 stdma_lock(floppy_irq, NULL); 658 atari_turnon_irq( IRQ_MFP_FDC ); /* should be already, just to be sure */ 659 local_irq_restore(flags); 660 661 if (type) { 662 if (--type >= NUM_DISK_MINORS || 663 minor2disktype[type].drive_types > DriveType) { 664 redo_fd_request(); 665 return -EINVAL; 666 } 667 type = minor2disktype[type].index; 668 UDT = &atari_disk_type[type]; 669 } 670 671 if (!UDT || desc->track >= UDT->blocks/UDT->spt/2 || desc->head >= 2) { 672 redo_fd_request(); 673 return -EINVAL; 674 } 675 676 nsect = UDT->spt; 677 p = TrackBuffer; 678 /* The track buffer is used for the raw track data, so its 679 contents become invalid! */ 680 BufferDrive = -1; 681 /* stop deselect timer */ 682 del_timer( &motor_off_timer ); 683 684 FILL( 60 * (nsect / 9), 0x4e ); 685 for( sect = 0; sect < nsect; ++sect ) { 686 FILL( 12, 0 ); 687 FILL( 3, 0xf5 ); 688 *p++ = 0xfe; 689 *p++ = desc->track; 690 *p++ = desc->head; 691 *p++ = (nsect + sect - desc->sect_offset) % nsect + 1; 692 *p++ = 2; 693 *p++ = 0xf7; 694 FILL( 22, 0x4e ); 695 FILL( 12, 0 ); 696 FILL( 3, 0xf5 ); 697 *p++ = 0xfb; 698 FILL( 512, 0xe5 ); 699 *p++ = 0xf7; 700 FILL( 40, 0x4e ); 701 } 702 FILL( TrackBuffer+BUFFER_SIZE-p, 0x4e ); 703 704 IsFormatting = 1; 705 FormatError = 0; 706 ReqTrack = desc->track; 707 ReqSide = desc->head; 708 do_fd_action( drive ); 709 710 wait_for_completion(&format_wait); 711 712 redo_fd_request(); 713 return( FormatError ? -EIO : 0 ); 714} 715 716 717/* do_fd_action() is the general procedure for a fd request: All 718 * required parameter settings (drive select, side select, track 719 * position) are checked and set if needed. For each of these 720 * parameters and the actual reading or writing exist two functions: 721 * one that starts the setting (or skips it if possible) and one 722 * callback for the "done" interrupt. Each done func calls the next 723 * set function to propagate the request down to fd_rwsec_done(). 724 */ 725 726static void do_fd_action( int drive ) 727{ 728 DPRINT(("do_fd_action\n")); 729 730 if (UseTrackbuffer && !IsFormatting) { 731 repeat: 732 if (IS_BUFFERED( drive, ReqSide, ReqTrack )) { 733 if (ReqCmd == READ) { 734 copy_buffer( SECTOR_BUFFER(ReqSector), ReqData ); 735 if (++ReqCnt < blk_rq_cur_sectors(fd_request)) { 736 /* read next sector */ 737 setup_req_params( drive ); 738 goto repeat; 739 } 740 else { 741 /* all sectors finished */ 742 fd_end_request_cur(0); 743 redo_fd_request(); 744 return; 745 } 746 } 747 else { 748 /* cmd == WRITE, pay attention to track buffer 749 * consistency! */ 750 copy_buffer( ReqData, SECTOR_BUFFER(ReqSector) ); 751 } 752 } 753 } 754 755 if (SelectedDrive != drive) 756 fd_select_drive( drive ); 757 758 if (UD.track == -1) 759 fd_calibrate(); 760 else if (UD.track != ReqTrack << UDT->stretch) 761 fd_seek(); 762 else if (IsFormatting) 763 fd_writetrack(); 764 else 765 fd_rwsec(); 766} 767 768 769/* Seek to track 0 if the current track is unknown */ 770 771static void fd_calibrate( void ) 772{ 773 if (SUD.track >= 0) { 774 fd_calibrate_done( 0 ); 775 return; 776 } 777 778 if (ATARIHW_PRESENT(FDCSPEED)) 779 dma_wd.fdc_speed = 0; /* always seek with 8 Mhz */; 780 DPRINT(("fd_calibrate\n")); 781 SET_IRQ_HANDLER( fd_calibrate_done ); 782 /* we can't verify, since the speed may be incorrect */ 783 FDC_WRITE( FDCREG_CMD, FDCCMD_RESTORE | SUD.steprate ); 784 785 NeedSeek = 1; 786 MotorOn = 1; 787 start_timeout(); 788 /* wait for IRQ */ 789} 790 791 792static void fd_calibrate_done( int status ) 793{ 794 DPRINT(("fd_calibrate_done()\n")); 795 stop_timeout(); 796 797 /* set the correct speed now */ 798 if (ATARIHW_PRESENT(FDCSPEED)) 799 dma_wd.fdc_speed = SUDT->fdc_speed; 800 if (status & FDCSTAT_RECNF) { 801 printk(KERN_ERR "fd%d: restore failed\n", SelectedDrive ); 802 fd_error(); 803 } 804 else { 805 SUD.track = 0; 806 fd_seek(); 807 } 808} 809 810 811/* Seek the drive to the requested track. The drive must have been 812 * calibrated at some point before this. 813 */ 814 815static void fd_seek( void ) 816{ 817 if (SUD.track == ReqTrack << SUDT->stretch) { 818 fd_seek_done( 0 ); 819 return; 820 } 821 822 if (ATARIHW_PRESENT(FDCSPEED)) { 823 dma_wd.fdc_speed = 0; /* always seek witch 8 Mhz */ 824 MFPDELAY(); 825 } 826 827 DPRINT(("fd_seek() to track %d\n",ReqTrack)); 828 FDC_WRITE( FDCREG_DATA, ReqTrack << SUDT->stretch); 829 udelay(25); 830 SET_IRQ_HANDLER( fd_seek_done ); 831 FDC_WRITE( FDCREG_CMD, FDCCMD_SEEK | SUD.steprate ); 832 833 MotorOn = 1; 834 set_head_settle_flag(); 835 start_timeout(); 836 /* wait for IRQ */ 837} 838 839 840static void fd_seek_done( int status ) 841{ 842 DPRINT(("fd_seek_done()\n")); 843 stop_timeout(); 844 845 /* set the correct speed */ 846 if (ATARIHW_PRESENT(FDCSPEED)) 847 dma_wd.fdc_speed = SUDT->fdc_speed; 848 if (status & FDCSTAT_RECNF) { 849 printk(KERN_ERR "fd%d: seek error (to track %d)\n", 850 SelectedDrive, ReqTrack ); 851 /* we don't know exactly which track we are on now! */ 852 SUD.track = -1; 853 fd_error(); 854 } 855 else { 856 SUD.track = ReqTrack << SUDT->stretch; 857 NeedSeek = 0; 858 if (IsFormatting) 859 fd_writetrack(); 860 else 861 fd_rwsec(); 862 } 863} 864 865 866/* This does the actual reading/writing after positioning the head 867 * over the correct track. 868 */ 869 870static int MultReadInProgress = 0; 871 872 873static void fd_rwsec( void ) 874{ 875 unsigned long paddr, flags; 876 unsigned int rwflag, old_motoron; 877 unsigned int track; 878 879 DPRINT(("fd_rwsec(), Sec=%d, Access=%c\n",ReqSector, ReqCmd == WRITE ? 'w' : 'r' )); 880 if (ReqCmd == WRITE) { 881 if (ATARIHW_PRESENT(EXTD_DMA)) { 882 paddr = virt_to_phys(ReqData); 883 } 884 else { 885 copy_buffer( ReqData, DMABuffer ); 886 paddr = PhysDMABuffer; 887 } 888 dma_cache_maintenance( paddr, 512, 1 ); 889 rwflag = 0x100; 890 } 891 else { 892 if (read_track) 893 paddr = PhysTrackBuffer; 894 else 895 paddr = ATARIHW_PRESENT(EXTD_DMA) ? 896 virt_to_phys(ReqData) : PhysDMABuffer; 897 rwflag = 0; 898 } 899 900 fd_select_side( ReqSide ); 901 902 /* Start sector of this operation */ 903 FDC_WRITE( FDCREG_SECTOR, read_track ? 1 : ReqSector ); 904 MFPDELAY(); 905 /* Cheat for track if stretch != 0 */ 906 if (SUDT->stretch) { 907 track = FDC_READ( FDCREG_TRACK); 908 MFPDELAY(); 909 FDC_WRITE( FDCREG_TRACK, track >> SUDT->stretch); 910 } 911 udelay(25); 912 913 /* Setup DMA */ 914 local_irq_save(flags); 915 dma_wd.dma_lo = (unsigned char)paddr; 916 MFPDELAY(); 917 paddr >>= 8; 918 dma_wd.dma_md = (unsigned char)paddr; 919 MFPDELAY(); 920 paddr >>= 8; 921 if (ATARIHW_PRESENT(EXTD_DMA)) 922 st_dma_ext_dmahi = (unsigned short)paddr; 923 else 924 dma_wd.dma_hi = (unsigned char)paddr; 925 MFPDELAY(); 926 local_irq_restore(flags); 927 928 /* Clear FIFO and switch DMA to correct mode */ 929 dma_wd.dma_mode_status = 0x90 | rwflag; 930 MFPDELAY(); 931 dma_wd.dma_mode_status = 0x90 | (rwflag ^ 0x100); 932 MFPDELAY(); 933 dma_wd.dma_mode_status = 0x90 | rwflag; 934 MFPDELAY(); 935 936 /* How many sectors for DMA */ 937 dma_wd.fdc_acces_seccount = read_track ? SUDT->spt : 1; 938 939 udelay(25); 940 941 /* Start operation */ 942 dma_wd.dma_mode_status = FDCSELREG_STP | rwflag; 943 udelay(25); 944 SET_IRQ_HANDLER( fd_rwsec_done ); 945 dma_wd.fdc_acces_seccount = 946 (get_head_settle_flag() | 947 (rwflag ? FDCCMD_WRSEC : (FDCCMD_RDSEC | (read_track ? FDCCMDADD_M : 0)))); 948 949 old_motoron = MotorOn; 950 MotorOn = 1; 951 NeedSeek = 1; 952 /* wait for interrupt */ 953 954 if (read_track) { 955 /* If reading a whole track, wait about one disk rotation and 956 * then check if all sectors are read. The FDC will even 957 * search for the first non-existent sector and need 1 sec to 958 * recognise that it isn't present :-( 959 */ 960 MultReadInProgress = 1; 961 mod_timer(&readtrack_timer, 962 /* 1 rot. + 5 rot.s if motor was off */ 963 jiffies + HZ/5 + (old_motoron ? 0 : HZ)); 964 } 965 start_timeout(); 966} 967 968 969static void fd_readtrack_check( unsigned long dummy ) 970{ 971 unsigned long flags, addr, addr2; 972 973 local_irq_save(flags); 974 975 if (!MultReadInProgress) { 976 /* This prevents a race condition that could arise if the 977 * interrupt is triggered while the calling of this timer 978 * callback function takes place. The IRQ function then has 979 * already cleared 'MultReadInProgress' when flow of control 980 * gets here. 981 */ 982 local_irq_restore(flags); 983 return; 984 } 985 986 /* get the current DMA address */ 987 /* ++ f.a. read twice to avoid being fooled by switcher */ 988 addr = 0; 989 do { 990 addr2 = addr; 991 addr = dma_wd.dma_lo & 0xff; 992 MFPDELAY(); 993 addr |= (dma_wd.dma_md & 0xff) << 8; 994 MFPDELAY(); 995 if (ATARIHW_PRESENT( EXTD_DMA )) 996 addr |= (st_dma_ext_dmahi & 0xffff) << 16; 997 else 998 addr |= (dma_wd.dma_hi & 0xff) << 16; 999 MFPDELAY(); 1000 } while(addr != addr2); 1001 1002 if (addr >= PhysTrackBuffer + SUDT->spt*512) { 1003 /* already read enough data, force an FDC interrupt to stop 1004 * the read operation 1005 */ 1006 SET_IRQ_HANDLER( NULL ); 1007 MultReadInProgress = 0; 1008 local_irq_restore(flags); 1009 DPRINT(("fd_readtrack_check(): done\n")); 1010 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); 1011 udelay(25); 1012 1013 /* No error until now -- the FDC would have interrupted 1014 * otherwise! 1015 */ 1016 fd_rwsec_done1(0); 1017 } 1018 else { 1019 /* not yet finished, wait another tenth rotation */ 1020 local_irq_restore(flags); 1021 DPRINT(("fd_readtrack_check(): not yet finished\n")); 1022 mod_timer(&readtrack_timer, jiffies + HZ/5/10); 1023 } 1024} 1025 1026 1027static void fd_rwsec_done( int status ) 1028{ 1029 DPRINT(("fd_rwsec_done()\n")); 1030 1031 if (read_track) { 1032 del_timer(&readtrack_timer); 1033 if (!MultReadInProgress) 1034 return; 1035 MultReadInProgress = 0; 1036 } 1037 fd_rwsec_done1(status); 1038} 1039 1040static void fd_rwsec_done1(int status) 1041{ 1042 unsigned int track; 1043 1044 stop_timeout(); 1045 1046 /* Correct the track if stretch != 0 */ 1047 if (SUDT->stretch) { 1048 track = FDC_READ( FDCREG_TRACK); 1049 MFPDELAY(); 1050 FDC_WRITE( FDCREG_TRACK, track << SUDT->stretch); 1051 } 1052 1053 if (!UseTrackbuffer) { 1054 dma_wd.dma_mode_status = 0x90; 1055 MFPDELAY(); 1056 if (!(dma_wd.dma_mode_status & 0x01)) { 1057 printk(KERN_ERR "fd%d: DMA error\n", SelectedDrive ); 1058 goto err_end; 1059 } 1060 } 1061 MFPDELAY(); 1062 1063 if (ReqCmd == WRITE && (status & FDCSTAT_WPROT)) { 1064 printk(KERN_NOTICE "fd%d: is write protected\n", SelectedDrive ); 1065 goto err_end; 1066 } 1067 if ((status & FDCSTAT_RECNF) && 1068 /* RECNF is no error after a multiple read when the FDC 1069 searched for a non-existent sector! */ 1070 !(read_track && FDC_READ(FDCREG_SECTOR) > SUDT->spt)) { 1071 if (Probing) { 1072 if (SUDT > atari_disk_type) { 1073 if (SUDT[-1].blocks > ReqBlock) { 1074 /* try another disk type */ 1075 SUDT--; 1076 set_capacity(unit[SelectedDrive].disk, 1077 SUDT->blocks); 1078 } else 1079 Probing = 0; 1080 } 1081 else { 1082 if (SUD.flags & FTD_MSG) 1083 printk(KERN_INFO "fd%d: Auto-detected floppy type %s\n", 1084 SelectedDrive, SUDT->name ); 1085 Probing=0; 1086 } 1087 } else { 1088/* record not found, but not probing. Maybe stretch wrong ? Restart probing */ 1089 if (SUD.autoprobe) { 1090 SUDT = atari_disk_type + StartDiskType[DriveType]; 1091 set_capacity(unit[SelectedDrive].disk, 1092 SUDT->blocks); 1093 Probing = 1; 1094 } 1095 } 1096 if (Probing) { 1097 if (ATARIHW_PRESENT(FDCSPEED)) { 1098 dma_wd.fdc_speed = SUDT->fdc_speed; 1099 MFPDELAY(); 1100 } 1101 setup_req_params( SelectedDrive ); 1102 BufferDrive = -1; 1103 do_fd_action( SelectedDrive ); 1104 return; 1105 } 1106 1107 printk(KERN_ERR "fd%d: sector %d not found (side %d, track %d)\n", 1108 SelectedDrive, FDC_READ (FDCREG_SECTOR), ReqSide, ReqTrack ); 1109 goto err_end; 1110 } 1111 if (status & FDCSTAT_CRC) { 1112 printk(KERN_ERR "fd%d: CRC error (side %d, track %d, sector %d)\n", 1113 SelectedDrive, ReqSide, ReqTrack, FDC_READ (FDCREG_SECTOR) ); 1114 goto err_end; 1115 } 1116 if (status & FDCSTAT_LOST) { 1117 printk(KERN_ERR "fd%d: lost data (side %d, track %d, sector %d)\n", 1118 SelectedDrive, ReqSide, ReqTrack, FDC_READ (FDCREG_SECTOR) ); 1119 goto err_end; 1120 } 1121 1122 Probing = 0; 1123 1124 if (ReqCmd == READ) { 1125 if (!read_track) { 1126 void *addr; 1127 addr = ATARIHW_PRESENT( EXTD_DMA ) ? ReqData : DMABuffer; 1128 dma_cache_maintenance( virt_to_phys(addr), 512, 0 ); 1129 if (!ATARIHW_PRESENT( EXTD_DMA )) 1130 copy_buffer (addr, ReqData); 1131 } else { 1132 dma_cache_maintenance( PhysTrackBuffer, MaxSectors[DriveType] * 512, 0 ); 1133 BufferDrive = SelectedDrive; 1134 BufferSide = ReqSide; 1135 BufferTrack = ReqTrack; 1136 copy_buffer (SECTOR_BUFFER (ReqSector), ReqData); 1137 } 1138 } 1139 1140 if (++ReqCnt < blk_rq_cur_sectors(fd_request)) { 1141 /* read next sector */ 1142 setup_req_params( SelectedDrive ); 1143 do_fd_action( SelectedDrive ); 1144 } 1145 else { 1146 /* all sectors finished */ 1147 fd_end_request_cur(0); 1148 redo_fd_request(); 1149 } 1150 return; 1151 1152 err_end: 1153 BufferDrive = -1; 1154 fd_error(); 1155} 1156 1157 1158static void fd_writetrack( void ) 1159{ 1160 unsigned long paddr, flags; 1161 unsigned int track; 1162 1163 DPRINT(("fd_writetrack() Tr=%d Si=%d\n", ReqTrack, ReqSide )); 1164 1165 paddr = PhysTrackBuffer; 1166 dma_cache_maintenance( paddr, BUFFER_SIZE, 1 ); 1167 1168 fd_select_side( ReqSide ); 1169 1170 /* Cheat for track if stretch != 0 */ 1171 if (SUDT->stretch) { 1172 track = FDC_READ( FDCREG_TRACK); 1173 MFPDELAY(); 1174 FDC_WRITE(FDCREG_TRACK,track >> SUDT->stretch); 1175 } 1176 udelay(40); 1177 1178 /* Setup DMA */ 1179 local_irq_save(flags); 1180 dma_wd.dma_lo = (unsigned char)paddr; 1181 MFPDELAY(); 1182 paddr >>= 8; 1183 dma_wd.dma_md = (unsigned char)paddr; 1184 MFPDELAY(); 1185 paddr >>= 8; 1186 if (ATARIHW_PRESENT( EXTD_DMA )) 1187 st_dma_ext_dmahi = (unsigned short)paddr; 1188 else 1189 dma_wd.dma_hi = (unsigned char)paddr; 1190 MFPDELAY(); 1191 local_irq_restore(flags); 1192 1193 /* Clear FIFO and switch DMA to correct mode */ 1194 dma_wd.dma_mode_status = 0x190; 1195 MFPDELAY(); 1196 dma_wd.dma_mode_status = 0x90; 1197 MFPDELAY(); 1198 dma_wd.dma_mode_status = 0x190; 1199 MFPDELAY(); 1200 1201 /* How many sectors for DMA */ 1202 dma_wd.fdc_acces_seccount = BUFFER_SIZE/512; 1203 udelay(40); 1204 1205 /* Start operation */ 1206 dma_wd.dma_mode_status = FDCSELREG_STP | 0x100; 1207 udelay(40); 1208 SET_IRQ_HANDLER( fd_writetrack_done ); 1209 dma_wd.fdc_acces_seccount = FDCCMD_WRTRA | get_head_settle_flag(); 1210 1211 MotorOn = 1; 1212 start_timeout(); 1213 /* wait for interrupt */ 1214} 1215 1216 1217static void fd_writetrack_done( int status ) 1218{ 1219 DPRINT(("fd_writetrack_done()\n")); 1220 1221 stop_timeout(); 1222 1223 if (status & FDCSTAT_WPROT) { 1224 printk(KERN_NOTICE "fd%d: is write protected\n", SelectedDrive ); 1225 goto err_end; 1226 } 1227 if (status & FDCSTAT_LOST) { 1228 printk(KERN_ERR "fd%d: lost data (side %d, track %d)\n", 1229 SelectedDrive, ReqSide, ReqTrack ); 1230 goto err_end; 1231 } 1232 1233 complete(&format_wait); 1234 return; 1235 1236 err_end: 1237 fd_error(); 1238} 1239 1240static void fd_times_out( unsigned long dummy ) 1241{ 1242 atari_disable_irq( IRQ_MFP_FDC ); 1243 if (!FloppyIRQHandler) goto end; /* int occurred after timer was fired, but 1244 * before we came here... */ 1245 1246 SET_IRQ_HANDLER( NULL ); 1247 /* If the timeout occurred while the readtrack_check timer was 1248 * active, we need to cancel it, else bad things will happen */ 1249 if (UseTrackbuffer) 1250 del_timer( &readtrack_timer ); 1251 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); 1252 udelay( 25 ); 1253 1254 printk(KERN_ERR "floppy timeout\n" ); 1255 fd_error(); 1256 end: 1257 atari_enable_irq( IRQ_MFP_FDC ); 1258} 1259 1260 1261/* The (noop) seek operation here is needed to make the WP bit in the 1262 * FDC status register accessible for check_change. If the last disk 1263 * operation would have been a RDSEC, this bit would always read as 0 1264 * no matter what :-( To save time, the seek goes to the track we're 1265 * already on. 1266 */ 1267 1268static void finish_fdc( void ) 1269{ 1270 if (!NeedSeek) { 1271 finish_fdc_done( 0 ); 1272 } 1273 else { 1274 DPRINT(("finish_fdc: dummy seek started\n")); 1275 FDC_WRITE (FDCREG_DATA, SUD.track); 1276 SET_IRQ_HANDLER( finish_fdc_done ); 1277 FDC_WRITE (FDCREG_CMD, FDCCMD_SEEK); 1278 MotorOn = 1; 1279 start_timeout(); 1280 /* we must wait for the IRQ here, because the ST-DMA 1281 is released immediately afterwards and the interrupt 1282 may be delivered to the wrong driver. */ 1283 } 1284} 1285 1286 1287static void finish_fdc_done( int dummy ) 1288{ 1289 unsigned long flags; 1290 1291 DPRINT(("finish_fdc_done entered\n")); 1292 stop_timeout(); 1293 NeedSeek = 0; 1294 1295 if (timer_pending(&fd_timer) && time_before(fd_timer.expires, jiffies + 5)) 1296 /* If the check for a disk change is done too early after this 1297 * last seek command, the WP bit still reads wrong :-(( 1298 */ 1299 mod_timer(&fd_timer, jiffies + 5); 1300 else 1301 start_check_change_timer(); 1302 start_motor_off_timer(); 1303 1304 local_irq_save(flags); 1305 stdma_release(); 1306 fdc_busy = 0; 1307 wake_up( &fdc_wait ); 1308 local_irq_restore(flags); 1309 1310 DPRINT(("finish_fdc() finished\n")); 1311} 1312 1313/* The detection of disk changes is a dark chapter in Atari history :-( 1314 * Because the "Drive ready" signal isn't present in the Atari 1315 * hardware, one has to rely on the "Write Protect". This works fine, 1316 * as long as no write protected disks are used. TOS solves this 1317 * problem by introducing tri-state logic ("maybe changed") and 1318 * looking at the serial number in block 0. This isn't possible for 1319 * Linux, since the floppy driver can't make assumptions about the 1320 * filesystem used on the disk and thus the contents of block 0. I've 1321 * chosen the method to always say "The disk was changed" if it is 1322 * unsure whether it was. This implies that every open or mount 1323 * invalidates the disk buffers if you work with write protected 1324 * disks. But at least this is better than working with incorrect data 1325 * due to unrecognised disk changes. 1326 */ 1327 1328static unsigned int floppy_check_events(struct gendisk *disk, 1329 unsigned int clearing) 1330{ 1331 struct atari_floppy_struct *p = disk->private_data; 1332 unsigned int drive = p - unit; 1333 if (test_bit (drive, &fake_change)) { 1334 /* simulated change (e.g. after formatting) */ 1335 return DISK_EVENT_MEDIA_CHANGE; 1336 } 1337 if (test_bit (drive, &changed_floppies)) { 1338 /* surely changed (the WP signal changed at least once) */ 1339 return DISK_EVENT_MEDIA_CHANGE; 1340 } 1341 if (UD.wpstat) { 1342 /* WP is on -> could be changed: to be sure, buffers should be 1343 * invalidated... 1344 */ 1345 return DISK_EVENT_MEDIA_CHANGE; 1346 } 1347 1348 return 0; 1349} 1350 1351static int floppy_revalidate(struct gendisk *disk) 1352{ 1353 struct atari_floppy_struct *p = disk->private_data; 1354 unsigned int drive = p - unit; 1355 1356 if (test_bit(drive, &changed_floppies) || 1357 test_bit(drive, &fake_change) || 1358 p->disktype == 0) { 1359 if (UD.flags & FTD_MSG) 1360 printk(KERN_ERR "floppy: clear format %p!\n", UDT); 1361 BufferDrive = -1; 1362 clear_bit(drive, &fake_change); 1363 clear_bit(drive, &changed_floppies); 1364 /* MSch: clearing geometry makes sense only for autoprobe 1365 formats, for 'permanent user-defined' parameter: 1366 restore default_params[] here if flagged valid! */ 1367 if (default_params[drive].blocks == 0) 1368 UDT = NULL; 1369 else 1370 UDT = &default_params[drive]; 1371 } 1372 return 0; 1373} 1374 1375 1376/* This sets up the global variables describing the current request. */ 1377 1378static void setup_req_params( int drive ) 1379{ 1380 int block = ReqBlock + ReqCnt; 1381 1382 ReqTrack = block / UDT->spt; 1383 ReqSector = block - ReqTrack * UDT->spt + 1; 1384 ReqSide = ReqTrack & 1; 1385 ReqTrack >>= 1; 1386 ReqData = ReqBuffer + 512 * ReqCnt; 1387 1388 if (UseTrackbuffer) 1389 read_track = (ReqCmd == READ && fd_request->errors == 0); 1390 else 1391 read_track = 0; 1392 1393 DPRINT(("Request params: Si=%d Tr=%d Se=%d Data=%08lx\n",ReqSide, 1394 ReqTrack, ReqSector, (unsigned long)ReqData )); 1395} 1396 1397/* 1398 * Round-robin between our available drives, doing one request from each 1399 */ 1400static struct request *set_next_request(void) 1401{ 1402 struct request_queue *q; 1403 int old_pos = fdc_queue; 1404 struct request *rq = NULL; 1405 1406 do { 1407 q = unit[fdc_queue].disk->queue; 1408 if (++fdc_queue == FD_MAX_UNITS) 1409 fdc_queue = 0; 1410 if (q) { 1411 rq = blk_fetch_request(q); 1412 if (rq) 1413 break; 1414 } 1415 } while (fdc_queue != old_pos); 1416 1417 return rq; 1418} 1419 1420 1421static void redo_fd_request(void) 1422{ 1423 int drive, type; 1424 struct atari_floppy_struct *floppy; 1425 1426 DPRINT(("redo_fd_request: fd_request=%p dev=%s fd_request->sector=%ld\n", 1427 fd_request, fd_request ? fd_request->rq_disk->disk_name : "", 1428 fd_request ? blk_rq_pos(fd_request) : 0 )); 1429 1430 IsFormatting = 0; 1431 1432repeat: 1433 if (!fd_request) { 1434 fd_request = set_next_request(); 1435 if (!fd_request) 1436 goto the_end; 1437 } 1438 1439 floppy = fd_request->rq_disk->private_data; 1440 drive = floppy - unit; 1441 type = floppy->type; 1442 1443 if (!UD.connected) { 1444 /* drive not connected */ 1445 printk(KERN_ERR "Unknown Device: fd%d\n", drive ); 1446 fd_end_request_cur(-EIO); 1447 goto repeat; 1448 } 1449 1450 if (type == 0) { 1451 if (!UDT) { 1452 Probing = 1; 1453 UDT = atari_disk_type + StartDiskType[DriveType]; 1454 set_capacity(floppy->disk, UDT->blocks); 1455 UD.autoprobe = 1; 1456 } 1457 } 1458 else { 1459 /* user supplied disk type */ 1460 if (--type >= NUM_DISK_MINORS) { 1461 printk(KERN_WARNING "fd%d: invalid disk format", drive ); 1462 fd_end_request_cur(-EIO); 1463 goto repeat; 1464 } 1465 if (minor2disktype[type].drive_types > DriveType) { 1466 printk(KERN_WARNING "fd%d: unsupported disk format", drive ); 1467 fd_end_request_cur(-EIO); 1468 goto repeat; 1469 } 1470 type = minor2disktype[type].index; 1471 UDT = &atari_disk_type[type]; 1472 set_capacity(floppy->disk, UDT->blocks); 1473 UD.autoprobe = 0; 1474 } 1475 1476 if (blk_rq_pos(fd_request) + 1 > UDT->blocks) { 1477 fd_end_request_cur(-EIO); 1478 goto repeat; 1479 } 1480 1481 /* stop deselect timer */ 1482 del_timer( &motor_off_timer ); 1483 1484 ReqCnt = 0; 1485 ReqCmd = rq_data_dir(fd_request); 1486 ReqBlock = blk_rq_pos(fd_request); 1487 ReqBuffer = bio_data(fd_request->bio); 1488 setup_req_params( drive ); 1489 do_fd_action( drive ); 1490 1491 return; 1492 1493 the_end: 1494 finish_fdc(); 1495} 1496 1497 1498void do_fd_request(struct request_queue * q) 1499{ 1500 DPRINT(("do_fd_request for pid %d\n",current->pid)); 1501 wait_event(fdc_wait, cmpxchg(&fdc_busy, 0, 1) == 0); 1502 stdma_lock(floppy_irq, NULL); 1503 1504 atari_disable_irq( IRQ_MFP_FDC ); 1505 redo_fd_request(); 1506 atari_enable_irq( IRQ_MFP_FDC ); 1507} 1508 1509static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, 1510 unsigned int cmd, unsigned long param) 1511{ 1512 struct gendisk *disk = bdev->bd_disk; 1513 struct atari_floppy_struct *floppy = disk->private_data; 1514 int drive = floppy - unit; 1515 int type = floppy->type; 1516 struct atari_format_descr fmt_desc; 1517 struct atari_disk_type *dtp; 1518 struct floppy_struct getprm; 1519 int settype; 1520 struct floppy_struct setprm; 1521 void __user *argp = (void __user *)param; 1522 1523 switch (cmd) { 1524 case FDGETPRM: 1525 if (type) { 1526 if (--type >= NUM_DISK_MINORS) 1527 return -ENODEV; 1528 if (minor2disktype[type].drive_types > DriveType) 1529 return -ENODEV; 1530 type = minor2disktype[type].index; 1531 dtp = &atari_disk_type[type]; 1532 if (UD.flags & FTD_MSG) 1533 printk (KERN_ERR "floppy%d: found dtp %p name %s!\n", 1534 drive, dtp, dtp->name); 1535 } 1536 else { 1537 if (!UDT) 1538 return -ENXIO; 1539 else 1540 dtp = UDT; 1541 } 1542 memset((void *)&getprm, 0, sizeof(getprm)); 1543 getprm.size = dtp->blocks; 1544 getprm.sect = dtp->spt; 1545 getprm.head = 2; 1546 getprm.track = dtp->blocks/dtp->spt/2; 1547 getprm.stretch = dtp->stretch; 1548 if (copy_to_user(argp, &getprm, sizeof(getprm))) 1549 return -EFAULT; 1550 return 0; 1551 } 1552 switch (cmd) { 1553 case FDSETPRM: 1554 case FDDEFPRM: 1555 /* 1556 * MSch 7/96: simple 'set geometry' case: just set the 1557 * 'default' device params (minor == 0). 1558 * Currently, the drive geometry is cleared after each 1559 * disk change and subsequent revalidate()! simple 1560 * implementation of FDDEFPRM: save geometry from a 1561 * FDDEFPRM call and restore it in floppy_revalidate() ! 1562 */ 1563 1564 /* get the parameters from user space */ 1565 if (floppy->ref != 1 && floppy->ref != -1) 1566 return -EBUSY; 1567 if (copy_from_user(&setprm, argp, sizeof(setprm))) 1568 return -EFAULT; 1569 /* 1570 * first of all: check for floppy change and revalidate, 1571 * or the next access will revalidate - and clear UDT :-( 1572 */ 1573 1574 if (floppy_check_events(disk, 0)) 1575 floppy_revalidate(disk); 1576 1577 if (UD.flags & FTD_MSG) 1578 printk (KERN_INFO "floppy%d: setting size %d spt %d str %d!\n", 1579 drive, setprm.size, setprm.sect, setprm.stretch); 1580 1581 /* what if type > 0 here? Overwrite specified entry ? */ 1582 if (type) { 1583 /* refuse to re-set a predefined type for now */ 1584 redo_fd_request(); 1585 return -EINVAL; 1586 } 1587 1588 /* 1589 * type == 0: first look for a matching entry in the type list, 1590 * and set the UD.disktype field to use the perdefined entry. 1591 * TODO: add user-defined format to head of autoprobe list ? 1592 * Useful to include the user-type for future autodetection! 1593 */ 1594 1595 for (settype = 0; settype < NUM_DISK_MINORS; settype++) { 1596 int setidx = 0; 1597 if (minor2disktype[settype].drive_types > DriveType) { 1598 /* skip this one, invalid for drive ... */ 1599 continue; 1600 } 1601 setidx = minor2disktype[settype].index; 1602 dtp = &atari_disk_type[setidx]; 1603 1604 /* found matching entry ?? */ 1605 if ( dtp->blocks == setprm.size 1606 && dtp->spt == setprm.sect 1607 && dtp->stretch == setprm.stretch ) { 1608 if (UD.flags & FTD_MSG) 1609 printk (KERN_INFO "floppy%d: setting %s %p!\n", 1610 drive, dtp->name, dtp); 1611 UDT = dtp; 1612 set_capacity(floppy->disk, UDT->blocks); 1613 1614 if (cmd == FDDEFPRM) { 1615 /* save settings as permanent default type */ 1616 default_params[drive].name = dtp->name; 1617 default_params[drive].spt = dtp->spt; 1618 default_params[drive].blocks = dtp->blocks; 1619 default_params[drive].fdc_speed = dtp->fdc_speed; 1620 default_params[drive].stretch = dtp->stretch; 1621 } 1622 1623 return 0; 1624 } 1625 1626 } 1627 1628 /* no matching disk type found above - setting user_params */ 1629 1630 if (cmd == FDDEFPRM) { 1631 /* set permanent type */ 1632 dtp = &default_params[drive]; 1633 } else 1634 /* set user type (reset by disk change!) */ 1635 dtp = &user_params[drive]; 1636 1637 dtp->name = "user format"; 1638 dtp->blocks = setprm.size; 1639 dtp->spt = setprm.sect; 1640 if (setprm.sect > 14) 1641 dtp->fdc_speed = 3; 1642 else 1643 dtp->fdc_speed = 0; 1644 dtp->stretch = setprm.stretch; 1645 1646 if (UD.flags & FTD_MSG) 1647 printk (KERN_INFO "floppy%d: blk %d spt %d str %d!\n", 1648 drive, dtp->blocks, dtp->spt, dtp->stretch); 1649 1650 /* sanity check */ 1651 if (setprm.track != dtp->blocks/dtp->spt/2 || 1652 setprm.head != 2) { 1653 redo_fd_request(); 1654 return -EINVAL; 1655 } 1656 1657 UDT = dtp; 1658 set_capacity(floppy->disk, UDT->blocks); 1659 1660 return 0; 1661 case FDMSGON: 1662 UD.flags |= FTD_MSG; 1663 return 0; 1664 case FDMSGOFF: 1665 UD.flags &= ~FTD_MSG; 1666 return 0; 1667 case FDSETEMSGTRESH: 1668 return -EINVAL; 1669 case FDFMTBEG: 1670 return 0; 1671 case FDFMTTRK: 1672 if (floppy->ref != 1 && floppy->ref != -1) 1673 return -EBUSY; 1674 if (copy_from_user(&fmt_desc, argp, sizeof(fmt_desc))) 1675 return -EFAULT; 1676 return do_format(drive, type, &fmt_desc); 1677 case FDCLRPRM: 1678 UDT = NULL; 1679 /* MSch: invalidate default_params */ 1680 default_params[drive].blocks = 0; 1681 set_capacity(floppy->disk, MAX_DISK_SIZE * 2); 1682 case FDFMTEND: 1683 case FDFLUSH: 1684 /* invalidate the buffer track to force a reread */ 1685 BufferDrive = -1; 1686 set_bit(drive, &fake_change); 1687 check_disk_change(bdev); 1688 return 0; 1689 default: 1690 return -EINVAL; 1691 } 1692} 1693 1694static int fd_ioctl(struct block_device *bdev, fmode_t mode, 1695 unsigned int cmd, unsigned long arg) 1696{ 1697 int ret; 1698 1699 mutex_lock(&ataflop_mutex); 1700 ret = fd_locked_ioctl(bdev, mode, cmd, arg); 1701 mutex_unlock(&ataflop_mutex); 1702 1703 return ret; 1704} 1705 1706/* Initialize the 'unit' variable for drive 'drive' */ 1707 1708static void __init fd_probe( int drive ) 1709{ 1710 UD.connected = 0; 1711 UDT = NULL; 1712 1713 if (!fd_test_drive_present( drive )) 1714 return; 1715 1716 UD.connected = 1; 1717 UD.track = 0; 1718 switch( UserSteprate[drive] ) { 1719 case 2: 1720 UD.steprate = FDCSTEP_2; 1721 break; 1722 case 3: 1723 UD.steprate = FDCSTEP_3; 1724 break; 1725 case 6: 1726 UD.steprate = FDCSTEP_6; 1727 break; 1728 case 12: 1729 UD.steprate = FDCSTEP_12; 1730 break; 1731 default: /* should be -1 for "not set by user" */ 1732 if (ATARIHW_PRESENT( FDCSPEED ) || MACH_IS_MEDUSA) 1733 UD.steprate = FDCSTEP_3; 1734 else 1735 UD.steprate = FDCSTEP_6; 1736 break; 1737 } 1738 MotorOn = 1; /* from probe restore operation! */ 1739} 1740 1741 1742/* This function tests the physical presence of a floppy drive (not 1743 * whether a disk is inserted). This is done by issuing a restore 1744 * command, waiting max. 2 seconds (that should be enough to move the 1745 * head across the whole disk) and looking at the state of the "TR00" 1746 * signal. This should now be raised if there is a drive connected 1747 * (and there is no hardware failure :-) Otherwise, the drive is 1748 * declared absent. 1749 */ 1750 1751static int __init fd_test_drive_present( int drive ) 1752{ 1753 unsigned long timeout; 1754 unsigned char status; 1755 int ok; 1756 1757 if (drive >= (MACH_IS_FALCON ? 1 : 2)) return( 0 ); 1758 fd_select_drive( drive ); 1759 1760 /* disable interrupt temporarily */ 1761 atari_turnoff_irq( IRQ_MFP_FDC ); 1762 FDC_WRITE (FDCREG_TRACK, 0xff00); 1763 FDC_WRITE( FDCREG_CMD, FDCCMD_RESTORE | FDCCMDADD_H | FDCSTEP_6 ); 1764 1765 timeout = jiffies + 2*HZ+HZ/2; 1766 while (time_before(jiffies, timeout)) 1767 if (!(st_mfp.par_dt_reg & 0x20)) 1768 break; 1769 1770 status = FDC_READ( FDCREG_STATUS ); 1771 ok = (status & FDCSTAT_TR00) != 0; 1772 1773 /* force interrupt to abort restore operation (FDC would try 1774 * about 50 seconds!) */ 1775 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); 1776 udelay(500); 1777 status = FDC_READ( FDCREG_STATUS ); 1778 udelay(20); 1779 1780 if (ok) { 1781 /* dummy seek command to make WP bit accessible */ 1782 FDC_WRITE( FDCREG_DATA, 0 ); 1783 FDC_WRITE( FDCREG_CMD, FDCCMD_SEEK ); 1784 while( st_mfp.par_dt_reg & 0x20 ) 1785 ; 1786 status = FDC_READ( FDCREG_STATUS ); 1787 } 1788 1789 atari_turnon_irq( IRQ_MFP_FDC ); 1790 return( ok ); 1791} 1792 1793 1794/* Look how many and which kind of drives are connected. If there are 1795 * floppies, additionally start the disk-change and motor-off timers. 1796 */ 1797 1798static void __init config_types( void ) 1799{ 1800 int drive, cnt = 0; 1801 1802 /* for probing drives, set the FDC speed to 8 MHz */ 1803 if (ATARIHW_PRESENT(FDCSPEED)) 1804 dma_wd.fdc_speed = 0; 1805 1806 printk(KERN_INFO "Probing floppy drive(s):\n"); 1807 for( drive = 0; drive < FD_MAX_UNITS; drive++ ) { 1808 fd_probe( drive ); 1809 if (UD.connected) { 1810 printk(KERN_INFO "fd%d\n", drive); 1811 ++cnt; 1812 } 1813 } 1814 1815 if (FDC_READ( FDCREG_STATUS ) & FDCSTAT_BUSY) { 1816 /* If FDC is still busy from probing, give it another FORCI 1817 * command to abort the operation. If this isn't done, the FDC 1818 * will interrupt later and its IRQ line stays low, because 1819 * the status register isn't read. And this will block any 1820 * interrupts on this IRQ line :-( 1821 */ 1822 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); 1823 udelay(500); 1824 FDC_READ( FDCREG_STATUS ); 1825 udelay(20); 1826 } 1827 1828 if (cnt > 0) { 1829 start_motor_off_timer(); 1830 if (cnt == 1) fd_select_drive( 0 ); 1831 start_check_change_timer(); 1832 } 1833} 1834 1835/* 1836 * floppy_open check for aliasing (/dev/fd0 can be the same as 1837 * /dev/PS0 etc), and disallows simultaneous access to the same 1838 * drive with different device numbers. 1839 */ 1840 1841static int floppy_open(struct block_device *bdev, fmode_t mode) 1842{ 1843 struct atari_floppy_struct *p = bdev->bd_disk->private_data; 1844 int type = MINOR(bdev->bd_dev) >> 2; 1845 1846 DPRINT(("fd_open: type=%d\n",type)); 1847 if (p->ref && p->type != type) 1848 return -EBUSY; 1849 1850 if (p->ref == -1 || (p->ref && mode & FMODE_EXCL)) 1851 return -EBUSY; 1852 1853 if (mode & FMODE_EXCL) 1854 p->ref = -1; 1855 else 1856 p->ref++; 1857 1858 p->type = type; 1859 1860 if (mode & FMODE_NDELAY) 1861 return 0; 1862 1863 if (mode & (FMODE_READ|FMODE_WRITE)) { 1864 check_disk_change(bdev); 1865 if (mode & FMODE_WRITE) { 1866 if (p->wpstat) { 1867 if (p->ref < 0) 1868 p->ref = 0; 1869 else 1870 p->ref--; 1871 return -EROFS; 1872 } 1873 } 1874 } 1875 return 0; 1876} 1877 1878static int floppy_unlocked_open(struct block_device *bdev, fmode_t mode) 1879{ 1880 int ret; 1881 1882 mutex_lock(&ataflop_mutex); 1883 ret = floppy_open(bdev, mode); 1884 mutex_unlock(&ataflop_mutex); 1885 1886 return ret; 1887} 1888 1889static void floppy_release(struct gendisk *disk, fmode_t mode) 1890{ 1891 struct atari_floppy_struct *p = disk->private_data; 1892 mutex_lock(&ataflop_mutex); 1893 if (p->ref < 0) 1894 p->ref = 0; 1895 else if (!p->ref--) { 1896 printk(KERN_ERR "floppy_release with fd_ref == 0"); 1897 p->ref = 0; 1898 } 1899 mutex_unlock(&ataflop_mutex); 1900} 1901 1902static const struct block_device_operations floppy_fops = { 1903 .owner = THIS_MODULE, 1904 .open = floppy_unlocked_open, 1905 .release = floppy_release, 1906 .ioctl = fd_ioctl, 1907 .check_events = floppy_check_events, 1908 .revalidate_disk= floppy_revalidate, 1909}; 1910 1911static struct kobject *floppy_find(dev_t dev, int *part, void *data) 1912{ 1913 int drive = *part & 3; 1914 int type = *part >> 2; 1915 if (drive >= FD_MAX_UNITS || type > NUM_DISK_MINORS) 1916 return NULL; 1917 *part = 0; 1918 return get_disk(unit[drive].disk); 1919} 1920 1921static int __init atari_floppy_init (void) 1922{ 1923 int i; 1924 1925 if (!MACH_IS_ATARI) 1926 /* Amiga, Mac, ... don't have Atari-compatible floppy :-) */ 1927 return -ENODEV; 1928 1929 if (register_blkdev(FLOPPY_MAJOR,"fd")) 1930 return -EBUSY; 1931 1932 for (i = 0; i < FD_MAX_UNITS; i++) { 1933 unit[i].disk = alloc_disk(1); 1934 if (!unit[i].disk) 1935 goto Enomem; 1936 } 1937 1938 if (UseTrackbuffer < 0) 1939 /* not set by user -> use default: for now, we turn 1940 track buffering off for all Medusas, though it 1941 could be used with ones that have a counter 1942 card. But the test is too hard :-( */ 1943 UseTrackbuffer = !MACH_IS_MEDUSA; 1944 1945 /* initialize variables */ 1946 SelectedDrive = -1; 1947 BufferDrive = -1; 1948 1949 DMABuffer = atari_stram_alloc(BUFFER_SIZE+512, "ataflop"); 1950 if (!DMABuffer) { 1951 printk(KERN_ERR "atari_floppy_init: cannot get dma buffer\n"); 1952 goto Enomem; 1953 } 1954 TrackBuffer = DMABuffer + 512; 1955 PhysDMABuffer = atari_stram_to_phys(DMABuffer); 1956 PhysTrackBuffer = virt_to_phys(TrackBuffer); 1957 BufferDrive = BufferSide = BufferTrack = -1; 1958 1959 for (i = 0; i < FD_MAX_UNITS; i++) { 1960 unit[i].track = -1; 1961 unit[i].flags = 0; 1962 unit[i].disk->major = FLOPPY_MAJOR; 1963 unit[i].disk->first_minor = i; 1964 sprintf(unit[i].disk->disk_name, "fd%d", i); 1965 unit[i].disk->fops = &floppy_fops; 1966 unit[i].disk->private_data = &unit[i]; 1967 unit[i].disk->queue = blk_init_queue(do_fd_request, 1968 &ataflop_lock); 1969 if (!unit[i].disk->queue) 1970 goto Enomem; 1971 set_capacity(unit[i].disk, MAX_DISK_SIZE * 2); 1972 add_disk(unit[i].disk); 1973 } 1974 1975 blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE, 1976 floppy_find, NULL, NULL); 1977 1978 printk(KERN_INFO "Atari floppy driver: max. %cD, %strack buffering\n", 1979 DriveType == 0 ? 'D' : DriveType == 1 ? 'H' : 'E', 1980 UseTrackbuffer ? "" : "no "); 1981 config_types(); 1982 1983 return 0; 1984Enomem: 1985 while (i--) { 1986 struct request_queue *q = unit[i].disk->queue; 1987 1988 put_disk(unit[i].disk); 1989 if (q) 1990 blk_cleanup_queue(q); 1991 } 1992 1993 unregister_blkdev(FLOPPY_MAJOR, "fd"); 1994 return -ENOMEM; 1995} 1996 1997#ifndef MODULE 1998static int __init atari_floppy_setup(char *str) 1999{ 2000 int ints[3 + FD_MAX_UNITS]; 2001 int i; 2002 2003 if (!MACH_IS_ATARI) 2004 return 0; 2005 2006 str = get_options(str, 3 + FD_MAX_UNITS, ints); 2007 2008 if (ints[0] < 1) { 2009 printk(KERN_ERR "ataflop_setup: no arguments!\n" ); 2010 return 0; 2011 } 2012 else if (ints[0] > 2+FD_MAX_UNITS) { 2013 printk(KERN_ERR "ataflop_setup: too many arguments\n" ); 2014 } 2015 2016 if (ints[1] < 0 || ints[1] > 2) 2017 printk(KERN_ERR "ataflop_setup: bad drive type\n" ); 2018 else 2019 DriveType = ints[1]; 2020 2021 if (ints[0] >= 2) 2022 UseTrackbuffer = (ints[2] > 0); 2023 2024 for( i = 3; i <= ints[0] && i-3 < FD_MAX_UNITS; ++i ) { 2025 if (ints[i] != 2 && ints[i] != 3 && ints[i] != 6 && ints[i] != 12) 2026 printk(KERN_ERR "ataflop_setup: bad steprate\n" ); 2027 else 2028 UserSteprate[i-3] = ints[i]; 2029 } 2030 return 1; 2031} 2032 2033__setup("floppy=", atari_floppy_setup); 2034#endif 2035 2036static void __exit atari_floppy_exit(void) 2037{ 2038 int i; 2039 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); 2040 for (i = 0; i < FD_MAX_UNITS; i++) { 2041 struct request_queue *q = unit[i].disk->queue; 2042 2043 del_gendisk(unit[i].disk); 2044 put_disk(unit[i].disk); 2045 blk_cleanup_queue(q); 2046 } 2047 unregister_blkdev(FLOPPY_MAJOR, "fd"); 2048 2049 del_timer_sync(&fd_timer); 2050 atari_stram_free( DMABuffer ); 2051} 2052 2053module_init(atari_floppy_init) 2054module_exit(atari_floppy_exit) 2055 2056MODULE_LICENSE("GPL"); 2057