1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * drivers/block/ataflop.c 4 * 5 * Copyright (C) 1993 Greg Harp 6 * Atari Support by Bjoern Brauel, Roman Hodek 7 * 8 * Big cleanup Sep 11..14 1994 Roman Hodek: 9 * - Driver now works interrupt driven 10 * - Support for two drives; should work, but I cannot test that :-( 11 * - Reading is done in whole tracks and buffered to speed up things 12 * - Disk change detection and drive deselecting after motor-off 13 * similar to TOS 14 * - Autodetection of disk format (DD/HD); untested yet, because I 15 * don't have an HD drive :-( 16 * 17 * Fixes Nov 13 1994 Martin Schaller: 18 * - Autodetection works now 19 * - Support for 5 1/4'' disks 20 * - Removed drive type (unknown on atari) 21 * - Do seeks with 8 Mhz 22 * 23 * Changes by Andreas Schwab: 24 * - After errors in multiple read mode try again reading single sectors 25 * (Feb 1995): 26 * - Clean up error handling 27 * - Set blk_size for proper size checking 28 * - Initialize track register when testing presence of floppy 29 * - Implement some ioctl's 30 * 31 * Changes by Torsten Lang: 32 * - When probing the floppies we should add the FDCCMDADD_H flag since 33 * the FDC will otherwise wait forever when no disk is inserted... 34 * 35 * ++ Freddi Aschwanden (fa) 20.9.95 fixes for medusa: 36 * - MFPDELAY() after each FDC access -> atari 37 * - more/other disk formats 38 * - DMA to the block buffer directly if we have a 32bit DMA 39 * - for medusa, the step rate is always 3ms 40 * - on medusa, use only cache_push() 41 * Roman: 42 * - Make disk format numbering independent from minors 43 * - Let user set max. supported drive type (speeds up format 44 * detection, saves buffer space) 45 * 46 * Roman 10/15/95: 47 * - implement some more ioctls 48 * - disk formatting 49 * 50 * Andreas 95/12/12: 51 * - increase gap size at start of track for HD/ED disks 52 * 53 * Michael (MSch) 11/07/96: 54 * - implemented FDSETPRM and FDDEFPRM ioctl 55 * 56 * Andreas (97/03/19): 57 * - implemented missing BLK* ioctls 58 * 59 * Things left to do: 60 * - Formatting 61 * - Maybe a better strategy for disk change detection (does anyone 62 * know one?) 63 */ 64 65 #include <linux/module.h> 66 67 #include <linux/fd.h> 68 #include <linux/delay.h> 69 #include <linux/init.h> 70 #include <linux/blk-mq.h> 71 #include <linux/mutex.h> 72 #include <linux/completion.h> 73 #include <linux/wait.h> 74 75 #include <asm/atariints.h> 76 #include <asm/atari_stdma.h> 77 #include <asm/atari_stram.h> 78 79 #define FD_MAX_UNITS 2 80 81 #undef DEBUG 82 83 static DEFINE_MUTEX(ataflop_mutex); 84 static struct request *fd_request; 85 86 /* 87 * WD1772 stuff 88 */ 89 90 /* register codes */ 91 92 #define FDCSELREG_STP (0x80) /* command/status register */ 93 #define FDCSELREG_TRA (0x82) /* track register */ 94 #define FDCSELREG_SEC (0x84) /* sector register */ 95 #define FDCSELREG_DTA (0x86) /* data register */ 96 97 /* register names for FDC_READ/WRITE macros */ 98 99 #define FDCREG_CMD 0 100 #define FDCREG_STATUS 0 101 #define FDCREG_TRACK 2 102 #define FDCREG_SECTOR 4 103 #define FDCREG_DATA 6 104 105 /* command opcodes */ 106 107 #define FDCCMD_RESTORE (0x00) /* - */ 108 #define FDCCMD_SEEK (0x10) /* | */ 109 #define FDCCMD_STEP (0x20) /* | TYP 1 Commands */ 110 #define FDCCMD_STIN (0x40) /* | */ 111 #define FDCCMD_STOT (0x60) /* - */ 112 #define FDCCMD_RDSEC (0x80) /* - TYP 2 Commands */ 113 #define FDCCMD_WRSEC (0xa0) /* - " */ 114 #define FDCCMD_RDADR (0xc0) /* - */ 115 #define FDCCMD_RDTRA (0xe0) /* | TYP 3 Commands */ 116 #define FDCCMD_WRTRA (0xf0) /* - */ 117 #define FDCCMD_FORCI (0xd0) /* - TYP 4 Command */ 118 119 /* command modifier bits */ 120 121 #define FDCCMDADD_SR6 (0x00) /* step rate settings */ 122 #define FDCCMDADD_SR12 (0x01) 123 #define FDCCMDADD_SR2 (0x02) 124 #define FDCCMDADD_SR3 (0x03) 125 #define FDCCMDADD_V (0x04) /* verify */ 126 #define FDCCMDADD_H (0x08) /* wait for spin-up */ 127 #define FDCCMDADD_U (0x10) /* update track register */ 128 #define FDCCMDADD_M (0x10) /* multiple sector access */ 129 #define FDCCMDADD_E (0x04) /* head settling flag */ 130 #define FDCCMDADD_P (0x02) /* precompensation off */ 131 #define FDCCMDADD_A0 (0x01) /* DAM flag */ 132 133 /* status register bits */ 134 135 #define FDCSTAT_MOTORON (0x80) /* motor on */ 136 #define FDCSTAT_WPROT (0x40) /* write protected (FDCCMD_WR*) */ 137 #define FDCSTAT_SPINUP (0x20) /* motor speed stable (Type I) */ 138 #define FDCSTAT_DELDAM (0x20) /* sector has deleted DAM (Type II+III) */ 139 #define FDCSTAT_RECNF (0x10) /* record not found */ 140 #define FDCSTAT_CRC (0x08) /* CRC error */ 141 #define FDCSTAT_TR00 (0x04) /* Track 00 flag (Type I) */ 142 #define FDCSTAT_LOST (0x04) /* Lost Data (Type II+III) */ 143 #define FDCSTAT_IDX (0x02) /* Index status (Type I) */ 144 #define FDCSTAT_DRQ (0x02) /* DRQ status (Type II+III) */ 145 #define FDCSTAT_BUSY (0x01) /* FDC is busy */ 146 147 148 /* PSG Port A Bit Nr 0 .. Side Sel .. 0 -> Side 1 1 -> Side 2 */ 149 #define DSKSIDE (0x01) 150 151 #define DSKDRVNONE (0x06) 152 #define DSKDRV0 (0x02) 153 #define DSKDRV1 (0x04) 154 155 /* step rates */ 156 #define FDCSTEP_6 0x00 157 #define FDCSTEP_12 0x01 158 #define FDCSTEP_2 0x02 159 #define FDCSTEP_3 0x03 160 161 struct atari_format_descr { 162 int track; /* to be formatted */ 163 int head; /* "" "" */ 164 int sect_offset; /* offset of first sector */ 165 }; 166 167 /* Disk types: DD, HD, ED */ 168 static struct atari_disk_type { 169 const char *name; 170 unsigned spt; /* sectors per track */ 171 unsigned blocks; /* total number of blocks */ 172 unsigned fdc_speed; /* fdc_speed setting */ 173 unsigned stretch; /* track doubling ? */ 174 } atari_disk_type[] = { 175 { "d360", 9, 720, 0, 0}, /* 0: 360kB diskette */ 176 { "D360", 9, 720, 0, 1}, /* 1: 360kb in 720k or 1.2MB drive */ 177 { "D720", 9,1440, 0, 0}, /* 2: 720kb in 720k or 1.2MB drive */ 178 { "D820", 10,1640, 0, 0}, /* 3: DD disk with 82 tracks/10 sectors */ 179 /* formats above are probed for type DD */ 180 #define MAX_TYPE_DD 3 181 { "h1200",15,2400, 3, 0}, /* 4: 1.2MB diskette */ 182 { "H1440",18,2880, 3, 0}, /* 5: 1.4 MB diskette (HD) */ 183 { "H1640",20,3280, 3, 0}, /* 6: 1.64MB diskette (fat HD) 82 tr 20 sec */ 184 /* formats above are probed for types DD and HD */ 185 #define MAX_TYPE_HD 6 186 { "E2880",36,5760, 3, 0}, /* 7: 2.8 MB diskette (ED) */ 187 { "E3280",40,6560, 3, 0}, /* 8: 3.2 MB diskette (fat ED) 82 tr 40 sec */ 188 /* formats above are probed for types DD, HD and ED */ 189 #define MAX_TYPE_ED 8 190 /* types below are never autoprobed */ 191 { "H1680",21,3360, 3, 0}, /* 9: 1.68MB diskette (fat HD) 80 tr 21 sec */ 192 { "h410",10,820, 0, 1}, /* 10: 410k diskette 41 tr 10 sec, stretch */ 193 { "h1476",18,2952, 3, 0}, /* 11: 1.48MB diskette 82 tr 18 sec */ 194 { "H1722",21,3444, 3, 0}, /* 12: 1.72MB diskette 82 tr 21 sec */ 195 { "h420",10,840, 0, 1}, /* 13: 420k diskette 42 tr 10 sec, stretch */ 196 { "H830",10,1660, 0, 0}, /* 14: 820k diskette 83 tr 10 sec */ 197 { "h1494",18,2952, 3, 0}, /* 15: 1.49MB diskette 83 tr 18 sec */ 198 { "H1743",21,3486, 3, 0}, /* 16: 1.74MB diskette 83 tr 21 sec */ 199 { "h880",11,1760, 0, 0}, /* 17: 880k diskette 80 tr 11 sec */ 200 { "D1040",13,2080, 0, 0}, /* 18: 1.04MB diskette 80 tr 13 sec */ 201 { "D1120",14,2240, 0, 0}, /* 19: 1.12MB diskette 80 tr 14 sec */ 202 { "h1600",20,3200, 3, 0}, /* 20: 1.60MB diskette 80 tr 20 sec */ 203 { "H1760",22,3520, 3, 0}, /* 21: 1.76MB diskette 80 tr 22 sec */ 204 { "H1920",24,3840, 3, 0}, /* 22: 1.92MB diskette 80 tr 24 sec */ 205 { "E3200",40,6400, 3, 0}, /* 23: 3.2MB diskette 80 tr 40 sec */ 206 { "E3520",44,7040, 3, 0}, /* 24: 3.52MB diskette 80 tr 44 sec */ 207 { "E3840",48,7680, 3, 0}, /* 25: 3.84MB diskette 80 tr 48 sec */ 208 { "H1840",23,3680, 3, 0}, /* 26: 1.84MB diskette 80 tr 23 sec */ 209 { "D800",10,1600, 0, 0}, /* 27: 800k diskette 80 tr 10 sec */ 210 }; 211 212 static int StartDiskType[] = { 213 MAX_TYPE_DD, 214 MAX_TYPE_HD, 215 MAX_TYPE_ED 216 }; 217 218 #define TYPE_DD 0 219 #define TYPE_HD 1 220 #define TYPE_ED 2 221 222 static int DriveType = TYPE_HD; 223 224 static DEFINE_SPINLOCK(ataflop_lock); 225 226 /* Array for translating minors into disk formats */ 227 static struct { 228 int index; 229 unsigned drive_types; 230 } minor2disktype[] = { 231 { 0, TYPE_DD }, /* 1: d360 */ 232 { 4, TYPE_HD }, /* 2: h1200 */ 233 { 1, TYPE_DD }, /* 3: D360 */ 234 { 2, TYPE_DD }, /* 4: D720 */ 235 { 1, TYPE_DD }, /* 5: h360 = D360 */ 236 { 2, TYPE_DD }, /* 6: h720 = D720 */ 237 { 5, TYPE_HD }, /* 7: H1440 */ 238 { 7, TYPE_ED }, /* 8: E2880 */ 239 /* some PC formats :-) */ 240 { 8, TYPE_ED }, /* 9: E3280 <- was "CompaQ" == E2880 for PC */ 241 { 5, TYPE_HD }, /* 10: h1440 = H1440 */ 242 { 9, TYPE_HD }, /* 11: H1680 */ 243 { 10, TYPE_DD }, /* 12: h410 */ 244 { 3, TYPE_DD }, /* 13: H820 <- == D820, 82x10 */ 245 { 11, TYPE_HD }, /* 14: h1476 */ 246 { 12, TYPE_HD }, /* 15: H1722 */ 247 { 13, TYPE_DD }, /* 16: h420 */ 248 { 14, TYPE_DD }, /* 17: H830 */ 249 { 15, TYPE_HD }, /* 18: h1494 */ 250 { 16, TYPE_HD }, /* 19: H1743 */ 251 { 17, TYPE_DD }, /* 20: h880 */ 252 { 18, TYPE_DD }, /* 21: D1040 */ 253 { 19, TYPE_DD }, /* 22: D1120 */ 254 { 20, TYPE_HD }, /* 23: h1600 */ 255 { 21, TYPE_HD }, /* 24: H1760 */ 256 { 22, TYPE_HD }, /* 25: H1920 */ 257 { 23, TYPE_ED }, /* 26: E3200 */ 258 { 24, TYPE_ED }, /* 27: E3520 */ 259 { 25, TYPE_ED }, /* 28: E3840 */ 260 { 26, TYPE_HD }, /* 29: H1840 */ 261 { 27, TYPE_DD }, /* 30: D800 */ 262 { 6, TYPE_HD }, /* 31: H1640 <- was H1600 == h1600 for PC */ 263 }; 264 265 #define NUM_DISK_MINORS ARRAY_SIZE(minor2disktype) 266 267 /* 268 * Maximum disk size (in kilobytes). This default is used whenever the 269 * current disk size is unknown. 270 */ 271 #define MAX_DISK_SIZE 3280 272 273 /* 274 * MSch: User-provided type information. 'drive' points to 275 * the respective entry of this array. Set by FDSETPRM ioctls. 276 */ 277 static struct atari_disk_type user_params[FD_MAX_UNITS]; 278 279 /* 280 * User-provided permanent type information. 'drive' points to 281 * the respective entry of this array. Set by FDDEFPRM ioctls, 282 * restored upon disk change by floppy_revalidate() if valid (as seen by 283 * default_params[].blocks > 0 - a bit in unit[].flags might be used for this?) 284 */ 285 static struct atari_disk_type default_params[FD_MAX_UNITS]; 286 287 /* current info on each unit */ 288 static struct atari_floppy_struct { 289 int connected; /* !=0 : drive is connected */ 290 int autoprobe; /* !=0 : do autoprobe */ 291 292 struct atari_disk_type *disktype; /* current type of disk */ 293 294 int track; /* current head position or -1 if 295 unknown */ 296 unsigned int steprate; /* steprate setting */ 297 unsigned int wpstat; /* current state of WP signal (for 298 disk change detection) */ 299 int flags; /* flags */ 300 struct gendisk *disk; 301 int ref; 302 int type; 303 struct blk_mq_tag_set tag_set; 304 } unit[FD_MAX_UNITS]; 305 306 #define UD unit[drive] 307 #define UDT unit[drive].disktype 308 #define SUD unit[SelectedDrive] 309 #define SUDT unit[SelectedDrive].disktype 310 311 312 #define FDC_READ(reg) ({ \ 313 /* unsigned long __flags; */ \ 314 unsigned short __val; \ 315 /* local_irq_save(__flags); */ \ 316 dma_wd.dma_mode_status = 0x80 | (reg); \ 317 udelay(25); \ 318 __val = dma_wd.fdc_acces_seccount; \ 319 MFPDELAY(); \ 320 /* local_irq_restore(__flags); */ \ 321 __val & 0xff; \ 322 }) 323 324 #define FDC_WRITE(reg,val) \ 325 do { \ 326 /* unsigned long __flags; */ \ 327 /* local_irq_save(__flags); */ \ 328 dma_wd.dma_mode_status = 0x80 | (reg); \ 329 udelay(25); \ 330 dma_wd.fdc_acces_seccount = (val); \ 331 MFPDELAY(); \ 332 /* local_irq_restore(__flags); */ \ 333 } while(0) 334 335 336 /* Buffering variables: 337 * First, there is a DMA buffer in ST-RAM that is used for floppy DMA 338 * operations. Second, a track buffer is used to cache a whole track 339 * of the disk to save read operations. These are two separate buffers 340 * because that allows write operations without clearing the track buffer. 341 */ 342 343 static int MaxSectors[] = { 344 11, 22, 44 345 }; 346 static int BufferSize[] = { 347 15*512, 30*512, 60*512 348 }; 349 350 #define BUFFER_SIZE (BufferSize[DriveType]) 351 352 unsigned char *DMABuffer; /* buffer for writes */ 353 static unsigned long PhysDMABuffer; /* physical address */ 354 355 static int UseTrackbuffer = -1; /* Do track buffering? */ 356 module_param(UseTrackbuffer, int, 0); 357 358 unsigned char *TrackBuffer; /* buffer for reads */ 359 static unsigned long PhysTrackBuffer; /* physical address */ 360 static int BufferDrive, BufferSide, BufferTrack; 361 static int read_track; /* non-zero if we are reading whole tracks */ 362 363 #define SECTOR_BUFFER(sec) (TrackBuffer + ((sec)-1)*512) 364 #define IS_BUFFERED(drive,side,track) \ 365 (BufferDrive == (drive) && BufferSide == (side) && BufferTrack == (track)) 366 367 /* 368 * These are global variables, as that's the easiest way to give 369 * information to interrupts. They are the data used for the current 370 * request. 371 */ 372 static int SelectedDrive = 0; 373 static int ReqCmd, ReqBlock; 374 static int ReqSide, ReqTrack, ReqSector, ReqCnt; 375 static int HeadSettleFlag = 0; 376 static unsigned char *ReqData, *ReqBuffer; 377 static int MotorOn = 0, MotorOffTrys; 378 static int IsFormatting = 0, FormatError; 379 380 static int UserSteprate[FD_MAX_UNITS] = { -1, -1 }; 381 module_param_array(UserSteprate, int, NULL, 0); 382 383 static DECLARE_COMPLETION(format_wait); 384 385 static unsigned long changed_floppies = 0xff, fake_change = 0; 386 #define CHECK_CHANGE_DELAY HZ/2 387 388 #define FD_MOTOR_OFF_DELAY (3*HZ) 389 #define FD_MOTOR_OFF_MAXTRY (10*20) 390 391 #define FLOPPY_TIMEOUT (6*HZ) 392 #define RECALIBRATE_ERRORS 4 /* After this many errors the drive 393 * will be recalibrated. */ 394 #define MAX_ERRORS 8 /* After this many errors the driver 395 * will give up. */ 396 397 398 /* 399 * The driver is trying to determine the correct media format 400 * while Probing is set. fd_rwsec_done() clears it after a 401 * successful access. 402 */ 403 static int Probing = 0; 404 405 /* This flag is set when a dummy seek is necessary to make the WP 406 * status bit accessible. 407 */ 408 static int NeedSeek = 0; 409 410 411 #ifdef DEBUG 412 #define DPRINT(a) printk a 413 #else 414 #define DPRINT(a) 415 #endif 416 417 /***************************** Prototypes *****************************/ 418 419 static void fd_select_side( int side ); 420 static void fd_select_drive( int drive ); 421 static void fd_deselect( void ); 422 static void fd_motor_off_timer(struct timer_list *unused); 423 static void check_change(struct timer_list *unused); 424 static irqreturn_t floppy_irq (int irq, void *dummy); 425 static void fd_error( void ); 426 static int do_format(int drive, int type, struct atari_format_descr *desc); 427 static void do_fd_action( int drive ); 428 static void fd_calibrate( void ); 429 static void fd_calibrate_done( int status ); 430 static void fd_seek( void ); 431 static void fd_seek_done( int status ); 432 static void fd_rwsec( void ); 433 static void fd_readtrack_check(struct timer_list *unused); 434 static void fd_rwsec_done( int status ); 435 static void fd_rwsec_done1(int status); 436 static void fd_writetrack( void ); 437 static void fd_writetrack_done( int status ); 438 static void fd_times_out(struct timer_list *unused); 439 static void finish_fdc( void ); 440 static void finish_fdc_done( int dummy ); 441 static void setup_req_params( int drive ); 442 static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int 443 cmd, unsigned long param); 444 static void fd_probe( int drive ); 445 static int fd_test_drive_present( int drive ); 446 static void config_types( void ); 447 static int floppy_open(struct block_device *bdev, fmode_t mode); 448 static void floppy_release(struct gendisk *disk, fmode_t mode); 449 450 /************************* End of Prototypes **************************/ 451 452 static DEFINE_TIMER(motor_off_timer, fd_motor_off_timer); 453 static DEFINE_TIMER(readtrack_timer, fd_readtrack_check); 454 static DEFINE_TIMER(timeout_timer, fd_times_out); 455 static DEFINE_TIMER(fd_timer, check_change); 456 457 static void fd_end_request_cur(blk_status_t err) 458 { 459 if (!blk_update_request(fd_request, err, 460 blk_rq_cur_bytes(fd_request))) { 461 __blk_mq_end_request(fd_request, err); 462 fd_request = NULL; 463 } 464 } 465 466 static inline void start_motor_off_timer(void) 467 { 468 mod_timer(&motor_off_timer, jiffies + FD_MOTOR_OFF_DELAY); 469 MotorOffTrys = 0; 470 } 471 472 static inline void start_check_change_timer( void ) 473 { 474 mod_timer(&fd_timer, jiffies + CHECK_CHANGE_DELAY); 475 } 476 477 static inline void start_timeout(void) 478 { 479 mod_timer(&timeout_timer, jiffies + FLOPPY_TIMEOUT); 480 } 481 482 static inline void stop_timeout(void) 483 { 484 del_timer(&timeout_timer); 485 } 486 487 /* Select the side to use. */ 488 489 static void fd_select_side( int side ) 490 { 491 unsigned long flags; 492 493 /* protect against various other ints mucking around with the PSG */ 494 local_irq_save(flags); 495 496 sound_ym.rd_data_reg_sel = 14; /* Select PSG Port A */ 497 sound_ym.wd_data = (side == 0) ? sound_ym.rd_data_reg_sel | 0x01 : 498 sound_ym.rd_data_reg_sel & 0xfe; 499 500 local_irq_restore(flags); 501 } 502 503 504 /* Select a drive, update the FDC's track register and set the correct 505 * clock speed for this disk's type. 506 */ 507 508 static void fd_select_drive( int drive ) 509 { 510 unsigned long flags; 511 unsigned char tmp; 512 513 if (drive == SelectedDrive) 514 return; 515 516 /* protect against various other ints mucking around with the PSG */ 517 local_irq_save(flags); 518 sound_ym.rd_data_reg_sel = 14; /* Select PSG Port A */ 519 tmp = sound_ym.rd_data_reg_sel; 520 sound_ym.wd_data = (tmp | DSKDRVNONE) & ~(drive == 0 ? DSKDRV0 : DSKDRV1); 521 atari_dont_touch_floppy_select = 1; 522 local_irq_restore(flags); 523 524 /* restore track register to saved value */ 525 FDC_WRITE( FDCREG_TRACK, UD.track ); 526 udelay(25); 527 528 /* select 8/16 MHz */ 529 if (UDT) 530 if (ATARIHW_PRESENT(FDCSPEED)) 531 dma_wd.fdc_speed = UDT->fdc_speed; 532 533 SelectedDrive = drive; 534 } 535 536 537 /* Deselect both drives. */ 538 539 static void fd_deselect( void ) 540 { 541 unsigned long flags; 542 543 /* protect against various other ints mucking around with the PSG */ 544 local_irq_save(flags); 545 atari_dont_touch_floppy_select = 0; 546 sound_ym.rd_data_reg_sel=14; /* Select PSG Port A */ 547 sound_ym.wd_data = (sound_ym.rd_data_reg_sel | 548 (MACH_IS_FALCON ? 3 : 7)); /* no drives selected */ 549 /* On Falcon, the drive B select line is used on the printer port, so 550 * leave it alone... */ 551 SelectedDrive = -1; 552 local_irq_restore(flags); 553 } 554 555 556 /* This timer function deselects the drives when the FDC switched the 557 * motor off. The deselection cannot happen earlier because the FDC 558 * counts the index signals, which arrive only if one drive is selected. 559 */ 560 561 static void fd_motor_off_timer(struct timer_list *unused) 562 { 563 unsigned char status; 564 565 if (SelectedDrive < 0) 566 /* no drive selected, needn't deselect anyone */ 567 return; 568 569 if (stdma_islocked()) 570 goto retry; 571 572 status = FDC_READ( FDCREG_STATUS ); 573 574 if (!(status & 0x80)) { 575 /* motor already turned off by FDC -> deselect drives */ 576 MotorOn = 0; 577 fd_deselect(); 578 return; 579 } 580 /* not yet off, try again */ 581 582 retry: 583 /* Test again later; if tested too often, it seems there is no disk 584 * in the drive and the FDC will leave the motor on forever (or, 585 * at least until a disk is inserted). So we'll test only twice 586 * per second from then on... 587 */ 588 mod_timer(&motor_off_timer, 589 jiffies + (MotorOffTrys++ < FD_MOTOR_OFF_MAXTRY ? HZ/20 : HZ/2)); 590 } 591 592 593 /* This function is repeatedly called to detect disk changes (as good 594 * as possible) and keep track of the current state of the write protection. 595 */ 596 597 static void check_change(struct timer_list *unused) 598 { 599 static int drive = 0; 600 601 unsigned long flags; 602 unsigned char old_porta; 603 int stat; 604 605 if (++drive > 1 || !UD.connected) 606 drive = 0; 607 608 /* protect against various other ints mucking around with the PSG */ 609 local_irq_save(flags); 610 611 if (!stdma_islocked()) { 612 sound_ym.rd_data_reg_sel = 14; 613 old_porta = sound_ym.rd_data_reg_sel; 614 sound_ym.wd_data = (old_porta | DSKDRVNONE) & 615 ~(drive == 0 ? DSKDRV0 : DSKDRV1); 616 stat = !!(FDC_READ( FDCREG_STATUS ) & FDCSTAT_WPROT); 617 sound_ym.wd_data = old_porta; 618 619 if (stat != UD.wpstat) { 620 DPRINT(( "wpstat[%d] = %d\n", drive, stat )); 621 UD.wpstat = stat; 622 set_bit (drive, &changed_floppies); 623 } 624 } 625 local_irq_restore(flags); 626 627 start_check_change_timer(); 628 } 629 630 631 /* Handling of the Head Settling Flag: This flag should be set after each 632 * seek operation, because we don't use seeks with verify. 633 */ 634 635 static inline void set_head_settle_flag(void) 636 { 637 HeadSettleFlag = FDCCMDADD_E; 638 } 639 640 static inline int get_head_settle_flag(void) 641 { 642 int tmp = HeadSettleFlag; 643 HeadSettleFlag = 0; 644 return( tmp ); 645 } 646 647 static inline void copy_buffer(void *from, void *to) 648 { 649 ulong *p1 = (ulong *)from, *p2 = (ulong *)to; 650 int cnt; 651 652 for (cnt = 512/4; cnt; cnt--) 653 *p2++ = *p1++; 654 } 655 656 657 658 659 /* General Interrupt Handling */ 660 661 static void (*FloppyIRQHandler)( int status ) = NULL; 662 663 static irqreturn_t floppy_irq (int irq, void *dummy) 664 { 665 unsigned char status; 666 void (*handler)( int ); 667 668 handler = xchg(&FloppyIRQHandler, NULL); 669 670 if (handler) { 671 nop(); 672 status = FDC_READ( FDCREG_STATUS ); 673 DPRINT(("FDC irq, status = %02x handler = %08lx\n",status,(unsigned long)handler)); 674 handler( status ); 675 } 676 else { 677 DPRINT(("FDC irq, no handler\n")); 678 } 679 return IRQ_HANDLED; 680 } 681 682 683 /* Error handling: If some error happened, retry some times, then 684 * recalibrate, then try again, and fail after MAX_ERRORS. 685 */ 686 687 static void fd_error( void ) 688 { 689 if (IsFormatting) { 690 IsFormatting = 0; 691 FormatError = 1; 692 complete(&format_wait); 693 return; 694 } 695 696 if (!fd_request) 697 return; 698 699 fd_request->error_count++; 700 if (fd_request->error_count >= MAX_ERRORS) { 701 printk(KERN_ERR "fd%d: too many errors.\n", SelectedDrive ); 702 fd_end_request_cur(BLK_STS_IOERR); 703 } 704 else if (fd_request->error_count == RECALIBRATE_ERRORS) { 705 printk(KERN_WARNING "fd%d: recalibrating\n", SelectedDrive ); 706 if (SelectedDrive != -1) 707 SUD.track = -1; 708 } 709 } 710 711 712 713 #define SET_IRQ_HANDLER(proc) do { FloppyIRQHandler = (proc); } while(0) 714 715 716 /* ---------- Formatting ---------- */ 717 718 #define FILL(n,val) \ 719 do { \ 720 memset( p, val, n ); \ 721 p += n; \ 722 } while(0) 723 724 static int do_format(int drive, int type, struct atari_format_descr *desc) 725 { 726 struct request_queue *q = unit[drive].disk->queue; 727 unsigned char *p; 728 int sect, nsect; 729 unsigned long flags; 730 int ret; 731 732 blk_mq_freeze_queue(q); 733 blk_mq_quiesce_queue(q); 734 735 local_irq_save(flags); 736 stdma_lock(floppy_irq, NULL); 737 atari_turnon_irq( IRQ_MFP_FDC ); /* should be already, just to be sure */ 738 local_irq_restore(flags); 739 740 if (type) { 741 if (--type >= NUM_DISK_MINORS || 742 minor2disktype[type].drive_types > DriveType) { 743 ret = -EINVAL; 744 goto out; 745 } 746 type = minor2disktype[type].index; 747 UDT = &atari_disk_type[type]; 748 } 749 750 if (!UDT || desc->track >= UDT->blocks/UDT->spt/2 || desc->head >= 2) { 751 ret = -EINVAL; 752 goto out; 753 } 754 755 nsect = UDT->spt; 756 p = TrackBuffer; 757 /* The track buffer is used for the raw track data, so its 758 contents become invalid! */ 759 BufferDrive = -1; 760 /* stop deselect timer */ 761 del_timer( &motor_off_timer ); 762 763 FILL( 60 * (nsect / 9), 0x4e ); 764 for( sect = 0; sect < nsect; ++sect ) { 765 FILL( 12, 0 ); 766 FILL( 3, 0xf5 ); 767 *p++ = 0xfe; 768 *p++ = desc->track; 769 *p++ = desc->head; 770 *p++ = (nsect + sect - desc->sect_offset) % nsect + 1; 771 *p++ = 2; 772 *p++ = 0xf7; 773 FILL( 22, 0x4e ); 774 FILL( 12, 0 ); 775 FILL( 3, 0xf5 ); 776 *p++ = 0xfb; 777 FILL( 512, 0xe5 ); 778 *p++ = 0xf7; 779 FILL( 40, 0x4e ); 780 } 781 FILL( TrackBuffer+BUFFER_SIZE-p, 0x4e ); 782 783 IsFormatting = 1; 784 FormatError = 0; 785 ReqTrack = desc->track; 786 ReqSide = desc->head; 787 do_fd_action( drive ); 788 789 wait_for_completion(&format_wait); 790 791 ret = FormatError ? -EIO : 0; 792 out: 793 blk_mq_unquiesce_queue(q); 794 blk_mq_unfreeze_queue(q); 795 return ret; 796 } 797 798 799 /* do_fd_action() is the general procedure for a fd request: All 800 * required parameter settings (drive select, side select, track 801 * position) are checked and set if needed. For each of these 802 * parameters and the actual reading or writing exist two functions: 803 * one that starts the setting (or skips it if possible) and one 804 * callback for the "done" interrupt. Each done func calls the next 805 * set function to propagate the request down to fd_rwsec_done(). 806 */ 807 808 static void do_fd_action( int drive ) 809 { 810 DPRINT(("do_fd_action\n")); 811 812 if (UseTrackbuffer && !IsFormatting) { 813 repeat: 814 if (IS_BUFFERED( drive, ReqSide, ReqTrack )) { 815 if (ReqCmd == READ) { 816 copy_buffer( SECTOR_BUFFER(ReqSector), ReqData ); 817 if (++ReqCnt < blk_rq_cur_sectors(fd_request)) { 818 /* read next sector */ 819 setup_req_params( drive ); 820 goto repeat; 821 } 822 else { 823 /* all sectors finished */ 824 fd_end_request_cur(BLK_STS_OK); 825 return; 826 } 827 } 828 else { 829 /* cmd == WRITE, pay attention to track buffer 830 * consistency! */ 831 copy_buffer( ReqData, SECTOR_BUFFER(ReqSector) ); 832 } 833 } 834 } 835 836 if (SelectedDrive != drive) 837 fd_select_drive( drive ); 838 839 if (UD.track == -1) 840 fd_calibrate(); 841 else if (UD.track != ReqTrack << UDT->stretch) 842 fd_seek(); 843 else if (IsFormatting) 844 fd_writetrack(); 845 else 846 fd_rwsec(); 847 } 848 849 850 /* Seek to track 0 if the current track is unknown */ 851 852 static void fd_calibrate( void ) 853 { 854 if (SUD.track >= 0) { 855 fd_calibrate_done( 0 ); 856 return; 857 } 858 859 if (ATARIHW_PRESENT(FDCSPEED)) 860 dma_wd.fdc_speed = 0; /* always seek with 8 Mhz */ 861 DPRINT(("fd_calibrate\n")); 862 SET_IRQ_HANDLER( fd_calibrate_done ); 863 /* we can't verify, since the speed may be incorrect */ 864 FDC_WRITE( FDCREG_CMD, FDCCMD_RESTORE | SUD.steprate ); 865 866 NeedSeek = 1; 867 MotorOn = 1; 868 start_timeout(); 869 /* wait for IRQ */ 870 } 871 872 873 static void fd_calibrate_done( int status ) 874 { 875 DPRINT(("fd_calibrate_done()\n")); 876 stop_timeout(); 877 878 /* set the correct speed now */ 879 if (ATARIHW_PRESENT(FDCSPEED)) 880 dma_wd.fdc_speed = SUDT->fdc_speed; 881 if (status & FDCSTAT_RECNF) { 882 printk(KERN_ERR "fd%d: restore failed\n", SelectedDrive ); 883 fd_error(); 884 } 885 else { 886 SUD.track = 0; 887 fd_seek(); 888 } 889 } 890 891 892 /* Seek the drive to the requested track. The drive must have been 893 * calibrated at some point before this. 894 */ 895 896 static void fd_seek( void ) 897 { 898 if (SUD.track == ReqTrack << SUDT->stretch) { 899 fd_seek_done( 0 ); 900 return; 901 } 902 903 if (ATARIHW_PRESENT(FDCSPEED)) { 904 dma_wd.fdc_speed = 0; /* always seek witch 8 Mhz */ 905 MFPDELAY(); 906 } 907 908 DPRINT(("fd_seek() to track %d\n",ReqTrack)); 909 FDC_WRITE( FDCREG_DATA, ReqTrack << SUDT->stretch); 910 udelay(25); 911 SET_IRQ_HANDLER( fd_seek_done ); 912 FDC_WRITE( FDCREG_CMD, FDCCMD_SEEK | SUD.steprate ); 913 914 MotorOn = 1; 915 set_head_settle_flag(); 916 start_timeout(); 917 /* wait for IRQ */ 918 } 919 920 921 static void fd_seek_done( int status ) 922 { 923 DPRINT(("fd_seek_done()\n")); 924 stop_timeout(); 925 926 /* set the correct speed */ 927 if (ATARIHW_PRESENT(FDCSPEED)) 928 dma_wd.fdc_speed = SUDT->fdc_speed; 929 if (status & FDCSTAT_RECNF) { 930 printk(KERN_ERR "fd%d: seek error (to track %d)\n", 931 SelectedDrive, ReqTrack ); 932 /* we don't know exactly which track we are on now! */ 933 SUD.track = -1; 934 fd_error(); 935 } 936 else { 937 SUD.track = ReqTrack << SUDT->stretch; 938 NeedSeek = 0; 939 if (IsFormatting) 940 fd_writetrack(); 941 else 942 fd_rwsec(); 943 } 944 } 945 946 947 /* This does the actual reading/writing after positioning the head 948 * over the correct track. 949 */ 950 951 static int MultReadInProgress = 0; 952 953 954 static void fd_rwsec( void ) 955 { 956 unsigned long paddr, flags; 957 unsigned int rwflag, old_motoron; 958 unsigned int track; 959 960 DPRINT(("fd_rwsec(), Sec=%d, Access=%c\n",ReqSector, ReqCmd == WRITE ? 'w' : 'r' )); 961 if (ReqCmd == WRITE) { 962 if (ATARIHW_PRESENT(EXTD_DMA)) { 963 paddr = virt_to_phys(ReqData); 964 } 965 else { 966 copy_buffer( ReqData, DMABuffer ); 967 paddr = PhysDMABuffer; 968 } 969 dma_cache_maintenance( paddr, 512, 1 ); 970 rwflag = 0x100; 971 } 972 else { 973 if (read_track) 974 paddr = PhysTrackBuffer; 975 else 976 paddr = ATARIHW_PRESENT(EXTD_DMA) ? 977 virt_to_phys(ReqData) : PhysDMABuffer; 978 rwflag = 0; 979 } 980 981 fd_select_side( ReqSide ); 982 983 /* Start sector of this operation */ 984 FDC_WRITE( FDCREG_SECTOR, read_track ? 1 : ReqSector ); 985 MFPDELAY(); 986 /* Cheat for track if stretch != 0 */ 987 if (SUDT->stretch) { 988 track = FDC_READ( FDCREG_TRACK); 989 MFPDELAY(); 990 FDC_WRITE( FDCREG_TRACK, track >> SUDT->stretch); 991 } 992 udelay(25); 993 994 /* Setup DMA */ 995 local_irq_save(flags); 996 dma_wd.dma_lo = (unsigned char)paddr; 997 MFPDELAY(); 998 paddr >>= 8; 999 dma_wd.dma_md = (unsigned char)paddr; 1000 MFPDELAY(); 1001 paddr >>= 8; 1002 if (ATARIHW_PRESENT(EXTD_DMA)) 1003 st_dma_ext_dmahi = (unsigned short)paddr; 1004 else 1005 dma_wd.dma_hi = (unsigned char)paddr; 1006 MFPDELAY(); 1007 local_irq_restore(flags); 1008 1009 /* Clear FIFO and switch DMA to correct mode */ 1010 dma_wd.dma_mode_status = 0x90 | rwflag; 1011 MFPDELAY(); 1012 dma_wd.dma_mode_status = 0x90 | (rwflag ^ 0x100); 1013 MFPDELAY(); 1014 dma_wd.dma_mode_status = 0x90 | rwflag; 1015 MFPDELAY(); 1016 1017 /* How many sectors for DMA */ 1018 dma_wd.fdc_acces_seccount = read_track ? SUDT->spt : 1; 1019 1020 udelay(25); 1021 1022 /* Start operation */ 1023 dma_wd.dma_mode_status = FDCSELREG_STP | rwflag; 1024 udelay(25); 1025 SET_IRQ_HANDLER( fd_rwsec_done ); 1026 dma_wd.fdc_acces_seccount = 1027 (get_head_settle_flag() | 1028 (rwflag ? FDCCMD_WRSEC : (FDCCMD_RDSEC | (read_track ? FDCCMDADD_M : 0)))); 1029 1030 old_motoron = MotorOn; 1031 MotorOn = 1; 1032 NeedSeek = 1; 1033 /* wait for interrupt */ 1034 1035 if (read_track) { 1036 /* If reading a whole track, wait about one disk rotation and 1037 * then check if all sectors are read. The FDC will even 1038 * search for the first non-existent sector and need 1 sec to 1039 * recognise that it isn't present :-( 1040 */ 1041 MultReadInProgress = 1; 1042 mod_timer(&readtrack_timer, 1043 /* 1 rot. + 5 rot.s if motor was off */ 1044 jiffies + HZ/5 + (old_motoron ? 0 : HZ)); 1045 } 1046 start_timeout(); 1047 } 1048 1049 1050 static void fd_readtrack_check(struct timer_list *unused) 1051 { 1052 unsigned long flags, addr, addr2; 1053 1054 local_irq_save(flags); 1055 1056 if (!MultReadInProgress) { 1057 /* This prevents a race condition that could arise if the 1058 * interrupt is triggered while the calling of this timer 1059 * callback function takes place. The IRQ function then has 1060 * already cleared 'MultReadInProgress' when flow of control 1061 * gets here. 1062 */ 1063 local_irq_restore(flags); 1064 return; 1065 } 1066 1067 /* get the current DMA address */ 1068 /* ++ f.a. read twice to avoid being fooled by switcher */ 1069 addr = 0; 1070 do { 1071 addr2 = addr; 1072 addr = dma_wd.dma_lo & 0xff; 1073 MFPDELAY(); 1074 addr |= (dma_wd.dma_md & 0xff) << 8; 1075 MFPDELAY(); 1076 if (ATARIHW_PRESENT( EXTD_DMA )) 1077 addr |= (st_dma_ext_dmahi & 0xffff) << 16; 1078 else 1079 addr |= (dma_wd.dma_hi & 0xff) << 16; 1080 MFPDELAY(); 1081 } while(addr != addr2); 1082 1083 if (addr >= PhysTrackBuffer + SUDT->spt*512) { 1084 /* already read enough data, force an FDC interrupt to stop 1085 * the read operation 1086 */ 1087 SET_IRQ_HANDLER( NULL ); 1088 MultReadInProgress = 0; 1089 local_irq_restore(flags); 1090 DPRINT(("fd_readtrack_check(): done\n")); 1091 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); 1092 udelay(25); 1093 1094 /* No error until now -- the FDC would have interrupted 1095 * otherwise! 1096 */ 1097 fd_rwsec_done1(0); 1098 } 1099 else { 1100 /* not yet finished, wait another tenth rotation */ 1101 local_irq_restore(flags); 1102 DPRINT(("fd_readtrack_check(): not yet finished\n")); 1103 mod_timer(&readtrack_timer, jiffies + HZ/5/10); 1104 } 1105 } 1106 1107 1108 static void fd_rwsec_done( int status ) 1109 { 1110 DPRINT(("fd_rwsec_done()\n")); 1111 1112 if (read_track) { 1113 del_timer(&readtrack_timer); 1114 if (!MultReadInProgress) 1115 return; 1116 MultReadInProgress = 0; 1117 } 1118 fd_rwsec_done1(status); 1119 } 1120 1121 static void fd_rwsec_done1(int status) 1122 { 1123 unsigned int track; 1124 1125 stop_timeout(); 1126 1127 /* Correct the track if stretch != 0 */ 1128 if (SUDT->stretch) { 1129 track = FDC_READ( FDCREG_TRACK); 1130 MFPDELAY(); 1131 FDC_WRITE( FDCREG_TRACK, track << SUDT->stretch); 1132 } 1133 1134 if (!UseTrackbuffer) { 1135 dma_wd.dma_mode_status = 0x90; 1136 MFPDELAY(); 1137 if (!(dma_wd.dma_mode_status & 0x01)) { 1138 printk(KERN_ERR "fd%d: DMA error\n", SelectedDrive ); 1139 goto err_end; 1140 } 1141 } 1142 MFPDELAY(); 1143 1144 if (ReqCmd == WRITE && (status & FDCSTAT_WPROT)) { 1145 printk(KERN_NOTICE "fd%d: is write protected\n", SelectedDrive ); 1146 goto err_end; 1147 } 1148 if ((status & FDCSTAT_RECNF) && 1149 /* RECNF is no error after a multiple read when the FDC 1150 searched for a non-existent sector! */ 1151 !(read_track && FDC_READ(FDCREG_SECTOR) > SUDT->spt)) { 1152 if (Probing) { 1153 if (SUDT > atari_disk_type) { 1154 if (SUDT[-1].blocks > ReqBlock) { 1155 /* try another disk type */ 1156 SUDT--; 1157 set_capacity(unit[SelectedDrive].disk, 1158 SUDT->blocks); 1159 } else 1160 Probing = 0; 1161 } 1162 else { 1163 if (SUD.flags & FTD_MSG) 1164 printk(KERN_INFO "fd%d: Auto-detected floppy type %s\n", 1165 SelectedDrive, SUDT->name ); 1166 Probing=0; 1167 } 1168 } else { 1169 /* record not found, but not probing. Maybe stretch wrong ? Restart probing */ 1170 if (SUD.autoprobe) { 1171 SUDT = atari_disk_type + StartDiskType[DriveType]; 1172 set_capacity(unit[SelectedDrive].disk, 1173 SUDT->blocks); 1174 Probing = 1; 1175 } 1176 } 1177 if (Probing) { 1178 if (ATARIHW_PRESENT(FDCSPEED)) { 1179 dma_wd.fdc_speed = SUDT->fdc_speed; 1180 MFPDELAY(); 1181 } 1182 setup_req_params( SelectedDrive ); 1183 BufferDrive = -1; 1184 do_fd_action( SelectedDrive ); 1185 return; 1186 } 1187 1188 printk(KERN_ERR "fd%d: sector %d not found (side %d, track %d)\n", 1189 SelectedDrive, FDC_READ (FDCREG_SECTOR), ReqSide, ReqTrack ); 1190 goto err_end; 1191 } 1192 if (status & FDCSTAT_CRC) { 1193 printk(KERN_ERR "fd%d: CRC error (side %d, track %d, sector %d)\n", 1194 SelectedDrive, ReqSide, ReqTrack, FDC_READ (FDCREG_SECTOR) ); 1195 goto err_end; 1196 } 1197 if (status & FDCSTAT_LOST) { 1198 printk(KERN_ERR "fd%d: lost data (side %d, track %d, sector %d)\n", 1199 SelectedDrive, ReqSide, ReqTrack, FDC_READ (FDCREG_SECTOR) ); 1200 goto err_end; 1201 } 1202 1203 Probing = 0; 1204 1205 if (ReqCmd == READ) { 1206 if (!read_track) { 1207 void *addr; 1208 addr = ATARIHW_PRESENT( EXTD_DMA ) ? ReqData : DMABuffer; 1209 dma_cache_maintenance( virt_to_phys(addr), 512, 0 ); 1210 if (!ATARIHW_PRESENT( EXTD_DMA )) 1211 copy_buffer (addr, ReqData); 1212 } else { 1213 dma_cache_maintenance( PhysTrackBuffer, MaxSectors[DriveType] * 512, 0 ); 1214 BufferDrive = SelectedDrive; 1215 BufferSide = ReqSide; 1216 BufferTrack = ReqTrack; 1217 copy_buffer (SECTOR_BUFFER (ReqSector), ReqData); 1218 } 1219 } 1220 1221 if (++ReqCnt < blk_rq_cur_sectors(fd_request)) { 1222 /* read next sector */ 1223 setup_req_params( SelectedDrive ); 1224 do_fd_action( SelectedDrive ); 1225 } 1226 else { 1227 /* all sectors finished */ 1228 fd_end_request_cur(BLK_STS_OK); 1229 } 1230 return; 1231 1232 err_end: 1233 BufferDrive = -1; 1234 fd_error(); 1235 } 1236 1237 1238 static void fd_writetrack( void ) 1239 { 1240 unsigned long paddr, flags; 1241 unsigned int track; 1242 1243 DPRINT(("fd_writetrack() Tr=%d Si=%d\n", ReqTrack, ReqSide )); 1244 1245 paddr = PhysTrackBuffer; 1246 dma_cache_maintenance( paddr, BUFFER_SIZE, 1 ); 1247 1248 fd_select_side( ReqSide ); 1249 1250 /* Cheat for track if stretch != 0 */ 1251 if (SUDT->stretch) { 1252 track = FDC_READ( FDCREG_TRACK); 1253 MFPDELAY(); 1254 FDC_WRITE(FDCREG_TRACK,track >> SUDT->stretch); 1255 } 1256 udelay(40); 1257 1258 /* Setup DMA */ 1259 local_irq_save(flags); 1260 dma_wd.dma_lo = (unsigned char)paddr; 1261 MFPDELAY(); 1262 paddr >>= 8; 1263 dma_wd.dma_md = (unsigned char)paddr; 1264 MFPDELAY(); 1265 paddr >>= 8; 1266 if (ATARIHW_PRESENT( EXTD_DMA )) 1267 st_dma_ext_dmahi = (unsigned short)paddr; 1268 else 1269 dma_wd.dma_hi = (unsigned char)paddr; 1270 MFPDELAY(); 1271 local_irq_restore(flags); 1272 1273 /* Clear FIFO and switch DMA to correct mode */ 1274 dma_wd.dma_mode_status = 0x190; 1275 MFPDELAY(); 1276 dma_wd.dma_mode_status = 0x90; 1277 MFPDELAY(); 1278 dma_wd.dma_mode_status = 0x190; 1279 MFPDELAY(); 1280 1281 /* How many sectors for DMA */ 1282 dma_wd.fdc_acces_seccount = BUFFER_SIZE/512; 1283 udelay(40); 1284 1285 /* Start operation */ 1286 dma_wd.dma_mode_status = FDCSELREG_STP | 0x100; 1287 udelay(40); 1288 SET_IRQ_HANDLER( fd_writetrack_done ); 1289 dma_wd.fdc_acces_seccount = FDCCMD_WRTRA | get_head_settle_flag(); 1290 1291 MotorOn = 1; 1292 start_timeout(); 1293 /* wait for interrupt */ 1294 } 1295 1296 1297 static void fd_writetrack_done( int status ) 1298 { 1299 DPRINT(("fd_writetrack_done()\n")); 1300 1301 stop_timeout(); 1302 1303 if (status & FDCSTAT_WPROT) { 1304 printk(KERN_NOTICE "fd%d: is write protected\n", SelectedDrive ); 1305 goto err_end; 1306 } 1307 if (status & FDCSTAT_LOST) { 1308 printk(KERN_ERR "fd%d: lost data (side %d, track %d)\n", 1309 SelectedDrive, ReqSide, ReqTrack ); 1310 goto err_end; 1311 } 1312 1313 complete(&format_wait); 1314 return; 1315 1316 err_end: 1317 fd_error(); 1318 } 1319 1320 static void fd_times_out(struct timer_list *unused) 1321 { 1322 atari_disable_irq( IRQ_MFP_FDC ); 1323 if (!FloppyIRQHandler) goto end; /* int occurred after timer was fired, but 1324 * before we came here... */ 1325 1326 SET_IRQ_HANDLER( NULL ); 1327 /* If the timeout occurred while the readtrack_check timer was 1328 * active, we need to cancel it, else bad things will happen */ 1329 if (UseTrackbuffer) 1330 del_timer( &readtrack_timer ); 1331 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); 1332 udelay( 25 ); 1333 1334 printk(KERN_ERR "floppy timeout\n" ); 1335 fd_error(); 1336 end: 1337 atari_enable_irq( IRQ_MFP_FDC ); 1338 } 1339 1340 1341 /* The (noop) seek operation here is needed to make the WP bit in the 1342 * FDC status register accessible for check_change. If the last disk 1343 * operation would have been a RDSEC, this bit would always read as 0 1344 * no matter what :-( To save time, the seek goes to the track we're 1345 * already on. 1346 */ 1347 1348 static void finish_fdc( void ) 1349 { 1350 if (!NeedSeek) { 1351 finish_fdc_done( 0 ); 1352 } 1353 else { 1354 DPRINT(("finish_fdc: dummy seek started\n")); 1355 FDC_WRITE (FDCREG_DATA, SUD.track); 1356 SET_IRQ_HANDLER( finish_fdc_done ); 1357 FDC_WRITE (FDCREG_CMD, FDCCMD_SEEK); 1358 MotorOn = 1; 1359 start_timeout(); 1360 /* we must wait for the IRQ here, because the ST-DMA 1361 is released immediately afterwards and the interrupt 1362 may be delivered to the wrong driver. */ 1363 } 1364 } 1365 1366 1367 static void finish_fdc_done( int dummy ) 1368 { 1369 unsigned long flags; 1370 1371 DPRINT(("finish_fdc_done entered\n")); 1372 stop_timeout(); 1373 NeedSeek = 0; 1374 1375 if (timer_pending(&fd_timer) && time_before(fd_timer.expires, jiffies + 5)) 1376 /* If the check for a disk change is done too early after this 1377 * last seek command, the WP bit still reads wrong :-(( 1378 */ 1379 mod_timer(&fd_timer, jiffies + 5); 1380 else 1381 start_check_change_timer(); 1382 start_motor_off_timer(); 1383 1384 local_irq_save(flags); 1385 stdma_release(); 1386 local_irq_restore(flags); 1387 1388 DPRINT(("finish_fdc() finished\n")); 1389 } 1390 1391 /* The detection of disk changes is a dark chapter in Atari history :-( 1392 * Because the "Drive ready" signal isn't present in the Atari 1393 * hardware, one has to rely on the "Write Protect". This works fine, 1394 * as long as no write protected disks are used. TOS solves this 1395 * problem by introducing tri-state logic ("maybe changed") and 1396 * looking at the serial number in block 0. This isn't possible for 1397 * Linux, since the floppy driver can't make assumptions about the 1398 * filesystem used on the disk and thus the contents of block 0. I've 1399 * chosen the method to always say "The disk was changed" if it is 1400 * unsure whether it was. This implies that every open or mount 1401 * invalidates the disk buffers if you work with write protected 1402 * disks. But at least this is better than working with incorrect data 1403 * due to unrecognised disk changes. 1404 */ 1405 1406 static unsigned int floppy_check_events(struct gendisk *disk, 1407 unsigned int clearing) 1408 { 1409 struct atari_floppy_struct *p = disk->private_data; 1410 unsigned int drive = p - unit; 1411 if (test_bit (drive, &fake_change)) { 1412 /* simulated change (e.g. after formatting) */ 1413 return DISK_EVENT_MEDIA_CHANGE; 1414 } 1415 if (test_bit (drive, &changed_floppies)) { 1416 /* surely changed (the WP signal changed at least once) */ 1417 return DISK_EVENT_MEDIA_CHANGE; 1418 } 1419 if (UD.wpstat) { 1420 /* WP is on -> could be changed: to be sure, buffers should be 1421 * invalidated... 1422 */ 1423 return DISK_EVENT_MEDIA_CHANGE; 1424 } 1425 1426 return 0; 1427 } 1428 1429 static int floppy_revalidate(struct gendisk *disk) 1430 { 1431 struct atari_floppy_struct *p = disk->private_data; 1432 unsigned int drive = p - unit; 1433 1434 if (test_bit(drive, &changed_floppies) || 1435 test_bit(drive, &fake_change) || 1436 p->disktype == 0) { 1437 if (UD.flags & FTD_MSG) 1438 printk(KERN_ERR "floppy: clear format %p!\n", UDT); 1439 BufferDrive = -1; 1440 clear_bit(drive, &fake_change); 1441 clear_bit(drive, &changed_floppies); 1442 /* MSch: clearing geometry makes sense only for autoprobe 1443 formats, for 'permanent user-defined' parameter: 1444 restore default_params[] here if flagged valid! */ 1445 if (default_params[drive].blocks == 0) 1446 UDT = NULL; 1447 else 1448 UDT = &default_params[drive]; 1449 } 1450 return 0; 1451 } 1452 1453 1454 /* This sets up the global variables describing the current request. */ 1455 1456 static void setup_req_params( int drive ) 1457 { 1458 int block = ReqBlock + ReqCnt; 1459 1460 ReqTrack = block / UDT->spt; 1461 ReqSector = block - ReqTrack * UDT->spt + 1; 1462 ReqSide = ReqTrack & 1; 1463 ReqTrack >>= 1; 1464 ReqData = ReqBuffer + 512 * ReqCnt; 1465 1466 if (UseTrackbuffer) 1467 read_track = (ReqCmd == READ && fd_request->error_count == 0); 1468 else 1469 read_track = 0; 1470 1471 DPRINT(("Request params: Si=%d Tr=%d Se=%d Data=%08lx\n",ReqSide, 1472 ReqTrack, ReqSector, (unsigned long)ReqData )); 1473 } 1474 1475 static void ataflop_commit_rqs(struct blk_mq_hw_ctx *hctx) 1476 { 1477 spin_lock_irq(&ataflop_lock); 1478 atari_disable_irq(IRQ_MFP_FDC); 1479 finish_fdc(); 1480 atari_enable_irq(IRQ_MFP_FDC); 1481 spin_unlock_irq(&ataflop_lock); 1482 } 1483 1484 static blk_status_t ataflop_queue_rq(struct blk_mq_hw_ctx *hctx, 1485 const struct blk_mq_queue_data *bd) 1486 { 1487 struct atari_floppy_struct *floppy = bd->rq->rq_disk->private_data; 1488 int drive = floppy - unit; 1489 int type = floppy->type; 1490 1491 spin_lock_irq(&ataflop_lock); 1492 if (fd_request) { 1493 spin_unlock_irq(&ataflop_lock); 1494 return BLK_STS_DEV_RESOURCE; 1495 } 1496 if (!stdma_try_lock(floppy_irq, NULL)) { 1497 spin_unlock_irq(&ataflop_lock); 1498 return BLK_STS_RESOURCE; 1499 } 1500 fd_request = bd->rq; 1501 blk_mq_start_request(fd_request); 1502 1503 atari_disable_irq( IRQ_MFP_FDC ); 1504 1505 IsFormatting = 0; 1506 1507 if (!UD.connected) { 1508 /* drive not connected */ 1509 printk(KERN_ERR "Unknown Device: fd%d\n", drive ); 1510 fd_end_request_cur(BLK_STS_IOERR); 1511 goto out; 1512 } 1513 1514 if (type == 0) { 1515 if (!UDT) { 1516 Probing = 1; 1517 UDT = atari_disk_type + StartDiskType[DriveType]; 1518 set_capacity(floppy->disk, UDT->blocks); 1519 UD.autoprobe = 1; 1520 } 1521 } 1522 else { 1523 /* user supplied disk type */ 1524 if (--type >= NUM_DISK_MINORS) { 1525 printk(KERN_WARNING "fd%d: invalid disk format", drive ); 1526 fd_end_request_cur(BLK_STS_IOERR); 1527 goto out; 1528 } 1529 if (minor2disktype[type].drive_types > DriveType) { 1530 printk(KERN_WARNING "fd%d: unsupported disk format", drive ); 1531 fd_end_request_cur(BLK_STS_IOERR); 1532 goto out; 1533 } 1534 type = minor2disktype[type].index; 1535 UDT = &atari_disk_type[type]; 1536 set_capacity(floppy->disk, UDT->blocks); 1537 UD.autoprobe = 0; 1538 } 1539 1540 /* stop deselect timer */ 1541 del_timer( &motor_off_timer ); 1542 1543 ReqCnt = 0; 1544 ReqCmd = rq_data_dir(fd_request); 1545 ReqBlock = blk_rq_pos(fd_request); 1546 ReqBuffer = bio_data(fd_request->bio); 1547 setup_req_params( drive ); 1548 do_fd_action( drive ); 1549 1550 if (bd->last) 1551 finish_fdc(); 1552 atari_enable_irq( IRQ_MFP_FDC ); 1553 1554 out: 1555 spin_unlock_irq(&ataflop_lock); 1556 return BLK_STS_OK; 1557 } 1558 1559 static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, 1560 unsigned int cmd, unsigned long param) 1561 { 1562 struct gendisk *disk = bdev->bd_disk; 1563 struct atari_floppy_struct *floppy = disk->private_data; 1564 int drive = floppy - unit; 1565 int type = floppy->type; 1566 struct atari_format_descr fmt_desc; 1567 struct atari_disk_type *dtp; 1568 struct floppy_struct getprm; 1569 int settype; 1570 struct floppy_struct setprm; 1571 void __user *argp = (void __user *)param; 1572 1573 switch (cmd) { 1574 case FDGETPRM: 1575 if (type) { 1576 if (--type >= NUM_DISK_MINORS) 1577 return -ENODEV; 1578 if (minor2disktype[type].drive_types > DriveType) 1579 return -ENODEV; 1580 type = minor2disktype[type].index; 1581 dtp = &atari_disk_type[type]; 1582 if (UD.flags & FTD_MSG) 1583 printk (KERN_ERR "floppy%d: found dtp %p name %s!\n", 1584 drive, dtp, dtp->name); 1585 } 1586 else { 1587 if (!UDT) 1588 return -ENXIO; 1589 else 1590 dtp = UDT; 1591 } 1592 memset((void *)&getprm, 0, sizeof(getprm)); 1593 getprm.size = dtp->blocks; 1594 getprm.sect = dtp->spt; 1595 getprm.head = 2; 1596 getprm.track = dtp->blocks/dtp->spt/2; 1597 getprm.stretch = dtp->stretch; 1598 if (copy_to_user(argp, &getprm, sizeof(getprm))) 1599 return -EFAULT; 1600 return 0; 1601 } 1602 switch (cmd) { 1603 case FDSETPRM: 1604 case FDDEFPRM: 1605 /* 1606 * MSch 7/96: simple 'set geometry' case: just set the 1607 * 'default' device params (minor == 0). 1608 * Currently, the drive geometry is cleared after each 1609 * disk change and subsequent revalidate()! simple 1610 * implementation of FDDEFPRM: save geometry from a 1611 * FDDEFPRM call and restore it in floppy_revalidate() ! 1612 */ 1613 1614 /* get the parameters from user space */ 1615 if (floppy->ref != 1 && floppy->ref != -1) 1616 return -EBUSY; 1617 if (copy_from_user(&setprm, argp, sizeof(setprm))) 1618 return -EFAULT; 1619 /* 1620 * first of all: check for floppy change and revalidate, 1621 * or the next access will revalidate - and clear UDT :-( 1622 */ 1623 1624 if (floppy_check_events(disk, 0)) 1625 floppy_revalidate(disk); 1626 1627 if (UD.flags & FTD_MSG) 1628 printk (KERN_INFO "floppy%d: setting size %d spt %d str %d!\n", 1629 drive, setprm.size, setprm.sect, setprm.stretch); 1630 1631 /* what if type > 0 here? Overwrite specified entry ? */ 1632 if (type) { 1633 /* refuse to re-set a predefined type for now */ 1634 return -EINVAL; 1635 } 1636 1637 /* 1638 * type == 0: first look for a matching entry in the type list, 1639 * and set the UD.disktype field to use the perdefined entry. 1640 * TODO: add user-defined format to head of autoprobe list ? 1641 * Useful to include the user-type for future autodetection! 1642 */ 1643 1644 for (settype = 0; settype < NUM_DISK_MINORS; settype++) { 1645 int setidx = 0; 1646 if (minor2disktype[settype].drive_types > DriveType) { 1647 /* skip this one, invalid for drive ... */ 1648 continue; 1649 } 1650 setidx = minor2disktype[settype].index; 1651 dtp = &atari_disk_type[setidx]; 1652 1653 /* found matching entry ?? */ 1654 if ( dtp->blocks == setprm.size 1655 && dtp->spt == setprm.sect 1656 && dtp->stretch == setprm.stretch ) { 1657 if (UD.flags & FTD_MSG) 1658 printk (KERN_INFO "floppy%d: setting %s %p!\n", 1659 drive, dtp->name, dtp); 1660 UDT = dtp; 1661 set_capacity(floppy->disk, UDT->blocks); 1662 1663 if (cmd == FDDEFPRM) { 1664 /* save settings as permanent default type */ 1665 default_params[drive].name = dtp->name; 1666 default_params[drive].spt = dtp->spt; 1667 default_params[drive].blocks = dtp->blocks; 1668 default_params[drive].fdc_speed = dtp->fdc_speed; 1669 default_params[drive].stretch = dtp->stretch; 1670 } 1671 1672 return 0; 1673 } 1674 1675 } 1676 1677 /* no matching disk type found above - setting user_params */ 1678 1679 if (cmd == FDDEFPRM) { 1680 /* set permanent type */ 1681 dtp = &default_params[drive]; 1682 } else 1683 /* set user type (reset by disk change!) */ 1684 dtp = &user_params[drive]; 1685 1686 dtp->name = "user format"; 1687 dtp->blocks = setprm.size; 1688 dtp->spt = setprm.sect; 1689 if (setprm.sect > 14) 1690 dtp->fdc_speed = 3; 1691 else 1692 dtp->fdc_speed = 0; 1693 dtp->stretch = setprm.stretch; 1694 1695 if (UD.flags & FTD_MSG) 1696 printk (KERN_INFO "floppy%d: blk %d spt %d str %d!\n", 1697 drive, dtp->blocks, dtp->spt, dtp->stretch); 1698 1699 /* sanity check */ 1700 if (setprm.track != dtp->blocks/dtp->spt/2 || 1701 setprm.head != 2) 1702 return -EINVAL; 1703 1704 UDT = dtp; 1705 set_capacity(floppy->disk, UDT->blocks); 1706 1707 return 0; 1708 case FDMSGON: 1709 UD.flags |= FTD_MSG; 1710 return 0; 1711 case FDMSGOFF: 1712 UD.flags &= ~FTD_MSG; 1713 return 0; 1714 case FDSETEMSGTRESH: 1715 return -EINVAL; 1716 case FDFMTBEG: 1717 return 0; 1718 case FDFMTTRK: 1719 if (floppy->ref != 1 && floppy->ref != -1) 1720 return -EBUSY; 1721 if (copy_from_user(&fmt_desc, argp, sizeof(fmt_desc))) 1722 return -EFAULT; 1723 return do_format(drive, type, &fmt_desc); 1724 case FDCLRPRM: 1725 UDT = NULL; 1726 /* MSch: invalidate default_params */ 1727 default_params[drive].blocks = 0; 1728 set_capacity(floppy->disk, MAX_DISK_SIZE * 2); 1729 /* Fall through */ 1730 case FDFMTEND: 1731 case FDFLUSH: 1732 /* invalidate the buffer track to force a reread */ 1733 BufferDrive = -1; 1734 set_bit(drive, &fake_change); 1735 check_disk_change(bdev); 1736 return 0; 1737 default: 1738 return -EINVAL; 1739 } 1740 } 1741 1742 static int fd_ioctl(struct block_device *bdev, fmode_t mode, 1743 unsigned int cmd, unsigned long arg) 1744 { 1745 int ret; 1746 1747 mutex_lock(&ataflop_mutex); 1748 ret = fd_locked_ioctl(bdev, mode, cmd, arg); 1749 mutex_unlock(&ataflop_mutex); 1750 1751 return ret; 1752 } 1753 1754 /* Initialize the 'unit' variable for drive 'drive' */ 1755 1756 static void __init fd_probe( int drive ) 1757 { 1758 UD.connected = 0; 1759 UDT = NULL; 1760 1761 if (!fd_test_drive_present( drive )) 1762 return; 1763 1764 UD.connected = 1; 1765 UD.track = 0; 1766 switch( UserSteprate[drive] ) { 1767 case 2: 1768 UD.steprate = FDCSTEP_2; 1769 break; 1770 case 3: 1771 UD.steprate = FDCSTEP_3; 1772 break; 1773 case 6: 1774 UD.steprate = FDCSTEP_6; 1775 break; 1776 case 12: 1777 UD.steprate = FDCSTEP_12; 1778 break; 1779 default: /* should be -1 for "not set by user" */ 1780 if (ATARIHW_PRESENT( FDCSPEED ) || MACH_IS_MEDUSA) 1781 UD.steprate = FDCSTEP_3; 1782 else 1783 UD.steprate = FDCSTEP_6; 1784 break; 1785 } 1786 MotorOn = 1; /* from probe restore operation! */ 1787 } 1788 1789 1790 /* This function tests the physical presence of a floppy drive (not 1791 * whether a disk is inserted). This is done by issuing a restore 1792 * command, waiting max. 2 seconds (that should be enough to move the 1793 * head across the whole disk) and looking at the state of the "TR00" 1794 * signal. This should now be raised if there is a drive connected 1795 * (and there is no hardware failure :-) Otherwise, the drive is 1796 * declared absent. 1797 */ 1798 1799 static int __init fd_test_drive_present( int drive ) 1800 { 1801 unsigned long timeout; 1802 unsigned char status; 1803 int ok; 1804 1805 if (drive >= (MACH_IS_FALCON ? 1 : 2)) return( 0 ); 1806 fd_select_drive( drive ); 1807 1808 /* disable interrupt temporarily */ 1809 atari_turnoff_irq( IRQ_MFP_FDC ); 1810 FDC_WRITE (FDCREG_TRACK, 0xff00); 1811 FDC_WRITE( FDCREG_CMD, FDCCMD_RESTORE | FDCCMDADD_H | FDCSTEP_6 ); 1812 1813 timeout = jiffies + 2*HZ+HZ/2; 1814 while (time_before(jiffies, timeout)) 1815 if (!(st_mfp.par_dt_reg & 0x20)) 1816 break; 1817 1818 status = FDC_READ( FDCREG_STATUS ); 1819 ok = (status & FDCSTAT_TR00) != 0; 1820 1821 /* force interrupt to abort restore operation (FDC would try 1822 * about 50 seconds!) */ 1823 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); 1824 udelay(500); 1825 status = FDC_READ( FDCREG_STATUS ); 1826 udelay(20); 1827 1828 if (ok) { 1829 /* dummy seek command to make WP bit accessible */ 1830 FDC_WRITE( FDCREG_DATA, 0 ); 1831 FDC_WRITE( FDCREG_CMD, FDCCMD_SEEK ); 1832 while( st_mfp.par_dt_reg & 0x20 ) 1833 ; 1834 status = FDC_READ( FDCREG_STATUS ); 1835 } 1836 1837 atari_turnon_irq( IRQ_MFP_FDC ); 1838 return( ok ); 1839 } 1840 1841 1842 /* Look how many and which kind of drives are connected. If there are 1843 * floppies, additionally start the disk-change and motor-off timers. 1844 */ 1845 1846 static void __init config_types( void ) 1847 { 1848 int drive, cnt = 0; 1849 1850 /* for probing drives, set the FDC speed to 8 MHz */ 1851 if (ATARIHW_PRESENT(FDCSPEED)) 1852 dma_wd.fdc_speed = 0; 1853 1854 printk(KERN_INFO "Probing floppy drive(s):\n"); 1855 for( drive = 0; drive < FD_MAX_UNITS; drive++ ) { 1856 fd_probe( drive ); 1857 if (UD.connected) { 1858 printk(KERN_INFO "fd%d\n", drive); 1859 ++cnt; 1860 } 1861 } 1862 1863 if (FDC_READ( FDCREG_STATUS ) & FDCSTAT_BUSY) { 1864 /* If FDC is still busy from probing, give it another FORCI 1865 * command to abort the operation. If this isn't done, the FDC 1866 * will interrupt later and its IRQ line stays low, because 1867 * the status register isn't read. And this will block any 1868 * interrupts on this IRQ line :-( 1869 */ 1870 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); 1871 udelay(500); 1872 FDC_READ( FDCREG_STATUS ); 1873 udelay(20); 1874 } 1875 1876 if (cnt > 0) { 1877 start_motor_off_timer(); 1878 if (cnt == 1) fd_select_drive( 0 ); 1879 start_check_change_timer(); 1880 } 1881 } 1882 1883 /* 1884 * floppy_open check for aliasing (/dev/fd0 can be the same as 1885 * /dev/PS0 etc), and disallows simultaneous access to the same 1886 * drive with different device numbers. 1887 */ 1888 1889 static int floppy_open(struct block_device *bdev, fmode_t mode) 1890 { 1891 struct atari_floppy_struct *p = bdev->bd_disk->private_data; 1892 int type = MINOR(bdev->bd_dev) >> 2; 1893 1894 DPRINT(("fd_open: type=%d\n",type)); 1895 if (p->ref && p->type != type) 1896 return -EBUSY; 1897 1898 if (p->ref == -1 || (p->ref && mode & FMODE_EXCL)) 1899 return -EBUSY; 1900 1901 if (mode & FMODE_EXCL) 1902 p->ref = -1; 1903 else 1904 p->ref++; 1905 1906 p->type = type; 1907 1908 if (mode & FMODE_NDELAY) 1909 return 0; 1910 1911 if (mode & (FMODE_READ|FMODE_WRITE)) { 1912 check_disk_change(bdev); 1913 if (mode & FMODE_WRITE) { 1914 if (p->wpstat) { 1915 if (p->ref < 0) 1916 p->ref = 0; 1917 else 1918 p->ref--; 1919 return -EROFS; 1920 } 1921 } 1922 } 1923 return 0; 1924 } 1925 1926 static int floppy_unlocked_open(struct block_device *bdev, fmode_t mode) 1927 { 1928 int ret; 1929 1930 mutex_lock(&ataflop_mutex); 1931 ret = floppy_open(bdev, mode); 1932 mutex_unlock(&ataflop_mutex); 1933 1934 return ret; 1935 } 1936 1937 static void floppy_release(struct gendisk *disk, fmode_t mode) 1938 { 1939 struct atari_floppy_struct *p = disk->private_data; 1940 mutex_lock(&ataflop_mutex); 1941 if (p->ref < 0) 1942 p->ref = 0; 1943 else if (!p->ref--) { 1944 printk(KERN_ERR "floppy_release with fd_ref == 0"); 1945 p->ref = 0; 1946 } 1947 mutex_unlock(&ataflop_mutex); 1948 } 1949 1950 static const struct block_device_operations floppy_fops = { 1951 .owner = THIS_MODULE, 1952 .open = floppy_unlocked_open, 1953 .release = floppy_release, 1954 .ioctl = fd_ioctl, 1955 .check_events = floppy_check_events, 1956 .revalidate_disk= floppy_revalidate, 1957 }; 1958 1959 static const struct blk_mq_ops ataflop_mq_ops = { 1960 .queue_rq = ataflop_queue_rq, 1961 .commit_rqs = ataflop_commit_rqs, 1962 }; 1963 1964 static struct kobject *floppy_find(dev_t dev, int *part, void *data) 1965 { 1966 int drive = *part & 3; 1967 int type = *part >> 2; 1968 if (drive >= FD_MAX_UNITS || type > NUM_DISK_MINORS) 1969 return NULL; 1970 *part = 0; 1971 return get_disk_and_module(unit[drive].disk); 1972 } 1973 1974 static int __init atari_floppy_init (void) 1975 { 1976 int i; 1977 int ret; 1978 1979 if (!MACH_IS_ATARI) 1980 /* Amiga, Mac, ... don't have Atari-compatible floppy :-) */ 1981 return -ENODEV; 1982 1983 if (register_blkdev(FLOPPY_MAJOR,"fd")) 1984 return -EBUSY; 1985 1986 for (i = 0; i < FD_MAX_UNITS; i++) { 1987 unit[i].disk = alloc_disk(1); 1988 if (!unit[i].disk) { 1989 ret = -ENOMEM; 1990 goto err; 1991 } 1992 1993 unit[i].disk->queue = blk_mq_init_sq_queue(&unit[i].tag_set, 1994 &ataflop_mq_ops, 2, 1995 BLK_MQ_F_SHOULD_MERGE); 1996 if (IS_ERR(unit[i].disk->queue)) { 1997 put_disk(unit[i].disk); 1998 ret = PTR_ERR(unit[i].disk->queue); 1999 unit[i].disk->queue = NULL; 2000 goto err; 2001 } 2002 } 2003 2004 if (UseTrackbuffer < 0) 2005 /* not set by user -> use default: for now, we turn 2006 track buffering off for all Medusas, though it 2007 could be used with ones that have a counter 2008 card. But the test is too hard :-( */ 2009 UseTrackbuffer = !MACH_IS_MEDUSA; 2010 2011 /* initialize variables */ 2012 SelectedDrive = -1; 2013 BufferDrive = -1; 2014 2015 DMABuffer = atari_stram_alloc(BUFFER_SIZE+512, "ataflop"); 2016 if (!DMABuffer) { 2017 printk(KERN_ERR "atari_floppy_init: cannot get dma buffer\n"); 2018 ret = -ENOMEM; 2019 goto err; 2020 } 2021 TrackBuffer = DMABuffer + 512; 2022 PhysDMABuffer = atari_stram_to_phys(DMABuffer); 2023 PhysTrackBuffer = virt_to_phys(TrackBuffer); 2024 BufferDrive = BufferSide = BufferTrack = -1; 2025 2026 for (i = 0; i < FD_MAX_UNITS; i++) { 2027 unit[i].track = -1; 2028 unit[i].flags = 0; 2029 unit[i].disk->major = FLOPPY_MAJOR; 2030 unit[i].disk->first_minor = i; 2031 sprintf(unit[i].disk->disk_name, "fd%d", i); 2032 unit[i].disk->fops = &floppy_fops; 2033 unit[i].disk->events = DISK_EVENT_MEDIA_CHANGE; 2034 unit[i].disk->private_data = &unit[i]; 2035 set_capacity(unit[i].disk, MAX_DISK_SIZE * 2); 2036 add_disk(unit[i].disk); 2037 } 2038 2039 blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE, 2040 floppy_find, NULL, NULL); 2041 2042 printk(KERN_INFO "Atari floppy driver: max. %cD, %strack buffering\n", 2043 DriveType == 0 ? 'D' : DriveType == 1 ? 'H' : 'E', 2044 UseTrackbuffer ? "" : "no "); 2045 config_types(); 2046 2047 return 0; 2048 2049 err: 2050 while (--i >= 0) { 2051 struct gendisk *disk = unit[i].disk; 2052 2053 blk_cleanup_queue(disk->queue); 2054 blk_mq_free_tag_set(&unit[i].tag_set); 2055 put_disk(unit[i].disk); 2056 } 2057 2058 unregister_blkdev(FLOPPY_MAJOR, "fd"); 2059 return ret; 2060 } 2061 2062 #ifndef MODULE 2063 static int __init atari_floppy_setup(char *str) 2064 { 2065 int ints[3 + FD_MAX_UNITS]; 2066 int i; 2067 2068 if (!MACH_IS_ATARI) 2069 return 0; 2070 2071 str = get_options(str, 3 + FD_MAX_UNITS, ints); 2072 2073 if (ints[0] < 1) { 2074 printk(KERN_ERR "ataflop_setup: no arguments!\n" ); 2075 return 0; 2076 } 2077 else if (ints[0] > 2+FD_MAX_UNITS) { 2078 printk(KERN_ERR "ataflop_setup: too many arguments\n" ); 2079 } 2080 2081 if (ints[1] < 0 || ints[1] > 2) 2082 printk(KERN_ERR "ataflop_setup: bad drive type\n" ); 2083 else 2084 DriveType = ints[1]; 2085 2086 if (ints[0] >= 2) 2087 UseTrackbuffer = (ints[2] > 0); 2088 2089 for( i = 3; i <= ints[0] && i-3 < FD_MAX_UNITS; ++i ) { 2090 if (ints[i] != 2 && ints[i] != 3 && ints[i] != 6 && ints[i] != 12) 2091 printk(KERN_ERR "ataflop_setup: bad steprate\n" ); 2092 else 2093 UserSteprate[i-3] = ints[i]; 2094 } 2095 return 1; 2096 } 2097 2098 __setup("floppy=", atari_floppy_setup); 2099 #endif 2100 2101 static void __exit atari_floppy_exit(void) 2102 { 2103 int i; 2104 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); 2105 for (i = 0; i < FD_MAX_UNITS; i++) { 2106 del_gendisk(unit[i].disk); 2107 blk_cleanup_queue(unit[i].disk->queue); 2108 blk_mq_free_tag_set(&unit[i].tag_set); 2109 put_disk(unit[i].disk); 2110 } 2111 unregister_blkdev(FLOPPY_MAJOR, "fd"); 2112 2113 del_timer_sync(&fd_timer); 2114 atari_stram_free( DMABuffer ); 2115 } 2116 2117 module_init(atari_floppy_init) 2118 module_exit(atari_floppy_exit) 2119 2120 MODULE_LICENSE("GPL"); 2121