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