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[NUM_DISK_MINORS]; 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; 727 unsigned char *p; 728 int sect, nsect; 729 unsigned long flags; 730 int ret; 731 732 if (type) 733 type--; 734 735 q = unit[drive].disk[type]->queue; 736 blk_mq_freeze_queue(q); 737 blk_mq_quiesce_queue(q); 738 739 local_irq_save(flags); 740 stdma_lock(floppy_irq, NULL); 741 atari_turnon_irq( IRQ_MFP_FDC ); /* should be already, just to be sure */ 742 local_irq_restore(flags); 743 744 if (type) { 745 if (type >= NUM_DISK_MINORS || 746 minor2disktype[type].drive_types > DriveType) { 747 ret = -EINVAL; 748 goto out; 749 } 750 type = minor2disktype[type].index; 751 UDT = &atari_disk_type[type]; 752 } 753 754 if (!UDT || desc->track >= UDT->blocks/UDT->spt/2 || desc->head >= 2) { 755 ret = -EINVAL; 756 goto out; 757 } 758 759 nsect = UDT->spt; 760 p = TrackBuffer; 761 /* The track buffer is used for the raw track data, so its 762 contents become invalid! */ 763 BufferDrive = -1; 764 /* stop deselect timer */ 765 del_timer( &motor_off_timer ); 766 767 FILL( 60 * (nsect / 9), 0x4e ); 768 for( sect = 0; sect < nsect; ++sect ) { 769 FILL( 12, 0 ); 770 FILL( 3, 0xf5 ); 771 *p++ = 0xfe; 772 *p++ = desc->track; 773 *p++ = desc->head; 774 *p++ = (nsect + sect - desc->sect_offset) % nsect + 1; 775 *p++ = 2; 776 *p++ = 0xf7; 777 FILL( 22, 0x4e ); 778 FILL( 12, 0 ); 779 FILL( 3, 0xf5 ); 780 *p++ = 0xfb; 781 FILL( 512, 0xe5 ); 782 *p++ = 0xf7; 783 FILL( 40, 0x4e ); 784 } 785 FILL( TrackBuffer+BUFFER_SIZE-p, 0x4e ); 786 787 IsFormatting = 1; 788 FormatError = 0; 789 ReqTrack = desc->track; 790 ReqSide = desc->head; 791 do_fd_action( drive ); 792 793 wait_for_completion(&format_wait); 794 795 ret = FormatError ? -EIO : 0; 796 out: 797 blk_mq_unquiesce_queue(q); 798 blk_mq_unfreeze_queue(q); 799 return ret; 800 } 801 802 803 /* do_fd_action() is the general procedure for a fd request: All 804 * required parameter settings (drive select, side select, track 805 * position) are checked and set if needed. For each of these 806 * parameters and the actual reading or writing exist two functions: 807 * one that starts the setting (or skips it if possible) and one 808 * callback for the "done" interrupt. Each done func calls the next 809 * set function to propagate the request down to fd_rwsec_done(). 810 */ 811 812 static void do_fd_action( int drive ) 813 { 814 DPRINT(("do_fd_action\n")); 815 816 if (UseTrackbuffer && !IsFormatting) { 817 repeat: 818 if (IS_BUFFERED( drive, ReqSide, ReqTrack )) { 819 if (ReqCmd == READ) { 820 copy_buffer( SECTOR_BUFFER(ReqSector), ReqData ); 821 if (++ReqCnt < blk_rq_cur_sectors(fd_request)) { 822 /* read next sector */ 823 setup_req_params( drive ); 824 goto repeat; 825 } 826 else { 827 /* all sectors finished */ 828 fd_end_request_cur(BLK_STS_OK); 829 return; 830 } 831 } 832 else { 833 /* cmd == WRITE, pay attention to track buffer 834 * consistency! */ 835 copy_buffer( ReqData, SECTOR_BUFFER(ReqSector) ); 836 } 837 } 838 } 839 840 if (SelectedDrive != drive) 841 fd_select_drive( drive ); 842 843 if (UD.track == -1) 844 fd_calibrate(); 845 else if (UD.track != ReqTrack << UDT->stretch) 846 fd_seek(); 847 else if (IsFormatting) 848 fd_writetrack(); 849 else 850 fd_rwsec(); 851 } 852 853 854 /* Seek to track 0 if the current track is unknown */ 855 856 static void fd_calibrate( void ) 857 { 858 if (SUD.track >= 0) { 859 fd_calibrate_done( 0 ); 860 return; 861 } 862 863 if (ATARIHW_PRESENT(FDCSPEED)) 864 dma_wd.fdc_speed = 0; /* always seek with 8 Mhz */ 865 DPRINT(("fd_calibrate\n")); 866 SET_IRQ_HANDLER( fd_calibrate_done ); 867 /* we can't verify, since the speed may be incorrect */ 868 FDC_WRITE( FDCREG_CMD, FDCCMD_RESTORE | SUD.steprate ); 869 870 NeedSeek = 1; 871 MotorOn = 1; 872 start_timeout(); 873 /* wait for IRQ */ 874 } 875 876 877 static void fd_calibrate_done( int status ) 878 { 879 DPRINT(("fd_calibrate_done()\n")); 880 stop_timeout(); 881 882 /* set the correct speed now */ 883 if (ATARIHW_PRESENT(FDCSPEED)) 884 dma_wd.fdc_speed = SUDT->fdc_speed; 885 if (status & FDCSTAT_RECNF) { 886 printk(KERN_ERR "fd%d: restore failed\n", SelectedDrive ); 887 fd_error(); 888 } 889 else { 890 SUD.track = 0; 891 fd_seek(); 892 } 893 } 894 895 896 /* Seek the drive to the requested track. The drive must have been 897 * calibrated at some point before this. 898 */ 899 900 static void fd_seek( void ) 901 { 902 if (SUD.track == ReqTrack << SUDT->stretch) { 903 fd_seek_done( 0 ); 904 return; 905 } 906 907 if (ATARIHW_PRESENT(FDCSPEED)) { 908 dma_wd.fdc_speed = 0; /* always seek witch 8 Mhz */ 909 MFPDELAY(); 910 } 911 912 DPRINT(("fd_seek() to track %d\n",ReqTrack)); 913 FDC_WRITE( FDCREG_DATA, ReqTrack << SUDT->stretch); 914 udelay(25); 915 SET_IRQ_HANDLER( fd_seek_done ); 916 FDC_WRITE( FDCREG_CMD, FDCCMD_SEEK | SUD.steprate ); 917 918 MotorOn = 1; 919 set_head_settle_flag(); 920 start_timeout(); 921 /* wait for IRQ */ 922 } 923 924 925 static void fd_seek_done( int status ) 926 { 927 DPRINT(("fd_seek_done()\n")); 928 stop_timeout(); 929 930 /* set the correct speed */ 931 if (ATARIHW_PRESENT(FDCSPEED)) 932 dma_wd.fdc_speed = SUDT->fdc_speed; 933 if (status & FDCSTAT_RECNF) { 934 printk(KERN_ERR "fd%d: seek error (to track %d)\n", 935 SelectedDrive, ReqTrack ); 936 /* we don't know exactly which track we are on now! */ 937 SUD.track = -1; 938 fd_error(); 939 } 940 else { 941 SUD.track = ReqTrack << SUDT->stretch; 942 NeedSeek = 0; 943 if (IsFormatting) 944 fd_writetrack(); 945 else 946 fd_rwsec(); 947 } 948 } 949 950 951 /* This does the actual reading/writing after positioning the head 952 * over the correct track. 953 */ 954 955 static int MultReadInProgress = 0; 956 957 958 static void fd_rwsec( void ) 959 { 960 unsigned long paddr, flags; 961 unsigned int rwflag, old_motoron; 962 unsigned int track; 963 964 DPRINT(("fd_rwsec(), Sec=%d, Access=%c\n",ReqSector, ReqCmd == WRITE ? 'w' : 'r' )); 965 if (ReqCmd == WRITE) { 966 if (ATARIHW_PRESENT(EXTD_DMA)) { 967 paddr = virt_to_phys(ReqData); 968 } 969 else { 970 copy_buffer( ReqData, DMABuffer ); 971 paddr = PhysDMABuffer; 972 } 973 dma_cache_maintenance( paddr, 512, 1 ); 974 rwflag = 0x100; 975 } 976 else { 977 if (read_track) 978 paddr = PhysTrackBuffer; 979 else 980 paddr = ATARIHW_PRESENT(EXTD_DMA) ? 981 virt_to_phys(ReqData) : PhysDMABuffer; 982 rwflag = 0; 983 } 984 985 fd_select_side( ReqSide ); 986 987 /* Start sector of this operation */ 988 FDC_WRITE( FDCREG_SECTOR, read_track ? 1 : ReqSector ); 989 MFPDELAY(); 990 /* Cheat for track if stretch != 0 */ 991 if (SUDT->stretch) { 992 track = FDC_READ( FDCREG_TRACK); 993 MFPDELAY(); 994 FDC_WRITE( FDCREG_TRACK, track >> SUDT->stretch); 995 } 996 udelay(25); 997 998 /* Setup DMA */ 999 local_irq_save(flags); 1000 dma_wd.dma_lo = (unsigned char)paddr; 1001 MFPDELAY(); 1002 paddr >>= 8; 1003 dma_wd.dma_md = (unsigned char)paddr; 1004 MFPDELAY(); 1005 paddr >>= 8; 1006 if (ATARIHW_PRESENT(EXTD_DMA)) 1007 st_dma_ext_dmahi = (unsigned short)paddr; 1008 else 1009 dma_wd.dma_hi = (unsigned char)paddr; 1010 MFPDELAY(); 1011 local_irq_restore(flags); 1012 1013 /* Clear FIFO and switch DMA to correct mode */ 1014 dma_wd.dma_mode_status = 0x90 | rwflag; 1015 MFPDELAY(); 1016 dma_wd.dma_mode_status = 0x90 | (rwflag ^ 0x100); 1017 MFPDELAY(); 1018 dma_wd.dma_mode_status = 0x90 | rwflag; 1019 MFPDELAY(); 1020 1021 /* How many sectors for DMA */ 1022 dma_wd.fdc_acces_seccount = read_track ? SUDT->spt : 1; 1023 1024 udelay(25); 1025 1026 /* Start operation */ 1027 dma_wd.dma_mode_status = FDCSELREG_STP | rwflag; 1028 udelay(25); 1029 SET_IRQ_HANDLER( fd_rwsec_done ); 1030 dma_wd.fdc_acces_seccount = 1031 (get_head_settle_flag() | 1032 (rwflag ? FDCCMD_WRSEC : (FDCCMD_RDSEC | (read_track ? FDCCMDADD_M : 0)))); 1033 1034 old_motoron = MotorOn; 1035 MotorOn = 1; 1036 NeedSeek = 1; 1037 /* wait for interrupt */ 1038 1039 if (read_track) { 1040 /* If reading a whole track, wait about one disk rotation and 1041 * then check if all sectors are read. The FDC will even 1042 * search for the first non-existent sector and need 1 sec to 1043 * recognise that it isn't present :-( 1044 */ 1045 MultReadInProgress = 1; 1046 mod_timer(&readtrack_timer, 1047 /* 1 rot. + 5 rot.s if motor was off */ 1048 jiffies + HZ/5 + (old_motoron ? 0 : HZ)); 1049 } 1050 start_timeout(); 1051 } 1052 1053 1054 static void fd_readtrack_check(struct timer_list *unused) 1055 { 1056 unsigned long flags, addr, addr2; 1057 1058 local_irq_save(flags); 1059 1060 if (!MultReadInProgress) { 1061 /* This prevents a race condition that could arise if the 1062 * interrupt is triggered while the calling of this timer 1063 * callback function takes place. The IRQ function then has 1064 * already cleared 'MultReadInProgress' when flow of control 1065 * gets here. 1066 */ 1067 local_irq_restore(flags); 1068 return; 1069 } 1070 1071 /* get the current DMA address */ 1072 /* ++ f.a. read twice to avoid being fooled by switcher */ 1073 addr = 0; 1074 do { 1075 addr2 = addr; 1076 addr = dma_wd.dma_lo & 0xff; 1077 MFPDELAY(); 1078 addr |= (dma_wd.dma_md & 0xff) << 8; 1079 MFPDELAY(); 1080 if (ATARIHW_PRESENT( EXTD_DMA )) 1081 addr |= (st_dma_ext_dmahi & 0xffff) << 16; 1082 else 1083 addr |= (dma_wd.dma_hi & 0xff) << 16; 1084 MFPDELAY(); 1085 } while(addr != addr2); 1086 1087 if (addr >= PhysTrackBuffer + SUDT->spt*512) { 1088 /* already read enough data, force an FDC interrupt to stop 1089 * the read operation 1090 */ 1091 SET_IRQ_HANDLER( NULL ); 1092 MultReadInProgress = 0; 1093 local_irq_restore(flags); 1094 DPRINT(("fd_readtrack_check(): done\n")); 1095 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); 1096 udelay(25); 1097 1098 /* No error until now -- the FDC would have interrupted 1099 * otherwise! 1100 */ 1101 fd_rwsec_done1(0); 1102 } 1103 else { 1104 /* not yet finished, wait another tenth rotation */ 1105 local_irq_restore(flags); 1106 DPRINT(("fd_readtrack_check(): not yet finished\n")); 1107 mod_timer(&readtrack_timer, jiffies + HZ/5/10); 1108 } 1109 } 1110 1111 1112 static void fd_rwsec_done( int status ) 1113 { 1114 DPRINT(("fd_rwsec_done()\n")); 1115 1116 if (read_track) { 1117 del_timer(&readtrack_timer); 1118 if (!MultReadInProgress) 1119 return; 1120 MultReadInProgress = 0; 1121 } 1122 fd_rwsec_done1(status); 1123 } 1124 1125 static void fd_rwsec_done1(int status) 1126 { 1127 unsigned int track; 1128 1129 stop_timeout(); 1130 1131 /* Correct the track if stretch != 0 */ 1132 if (SUDT->stretch) { 1133 track = FDC_READ( FDCREG_TRACK); 1134 MFPDELAY(); 1135 FDC_WRITE( FDCREG_TRACK, track << SUDT->stretch); 1136 } 1137 1138 if (!UseTrackbuffer) { 1139 dma_wd.dma_mode_status = 0x90; 1140 MFPDELAY(); 1141 if (!(dma_wd.dma_mode_status & 0x01)) { 1142 printk(KERN_ERR "fd%d: DMA error\n", SelectedDrive ); 1143 goto err_end; 1144 } 1145 } 1146 MFPDELAY(); 1147 1148 if (ReqCmd == WRITE && (status & FDCSTAT_WPROT)) { 1149 printk(KERN_NOTICE "fd%d: is write protected\n", SelectedDrive ); 1150 goto err_end; 1151 } 1152 if ((status & FDCSTAT_RECNF) && 1153 /* RECNF is no error after a multiple read when the FDC 1154 searched for a non-existent sector! */ 1155 !(read_track && FDC_READ(FDCREG_SECTOR) > SUDT->spt)) { 1156 if (Probing) { 1157 if (SUDT > atari_disk_type) { 1158 if (SUDT[-1].blocks > ReqBlock) { 1159 /* try another disk type */ 1160 SUDT--; 1161 set_capacity(unit[SelectedDrive].disk[0], 1162 SUDT->blocks); 1163 } else 1164 Probing = 0; 1165 } 1166 else { 1167 if (SUD.flags & FTD_MSG) 1168 printk(KERN_INFO "fd%d: Auto-detected floppy type %s\n", 1169 SelectedDrive, SUDT->name ); 1170 Probing=0; 1171 } 1172 } else { 1173 /* record not found, but not probing. Maybe stretch wrong ? Restart probing */ 1174 if (SUD.autoprobe) { 1175 SUDT = atari_disk_type + StartDiskType[DriveType]; 1176 set_capacity(unit[SelectedDrive].disk[0], 1177 SUDT->blocks); 1178 Probing = 1; 1179 } 1180 } 1181 if (Probing) { 1182 if (ATARIHW_PRESENT(FDCSPEED)) { 1183 dma_wd.fdc_speed = SUDT->fdc_speed; 1184 MFPDELAY(); 1185 } 1186 setup_req_params( SelectedDrive ); 1187 BufferDrive = -1; 1188 do_fd_action( SelectedDrive ); 1189 return; 1190 } 1191 1192 printk(KERN_ERR "fd%d: sector %d not found (side %d, track %d)\n", 1193 SelectedDrive, FDC_READ (FDCREG_SECTOR), ReqSide, ReqTrack ); 1194 goto err_end; 1195 } 1196 if (status & FDCSTAT_CRC) { 1197 printk(KERN_ERR "fd%d: CRC error (side %d, track %d, sector %d)\n", 1198 SelectedDrive, ReqSide, ReqTrack, FDC_READ (FDCREG_SECTOR) ); 1199 goto err_end; 1200 } 1201 if (status & FDCSTAT_LOST) { 1202 printk(KERN_ERR "fd%d: lost data (side %d, track %d, sector %d)\n", 1203 SelectedDrive, ReqSide, ReqTrack, FDC_READ (FDCREG_SECTOR) ); 1204 goto err_end; 1205 } 1206 1207 Probing = 0; 1208 1209 if (ReqCmd == READ) { 1210 if (!read_track) { 1211 void *addr; 1212 addr = ATARIHW_PRESENT( EXTD_DMA ) ? ReqData : DMABuffer; 1213 dma_cache_maintenance( virt_to_phys(addr), 512, 0 ); 1214 if (!ATARIHW_PRESENT( EXTD_DMA )) 1215 copy_buffer (addr, ReqData); 1216 } else { 1217 dma_cache_maintenance( PhysTrackBuffer, MaxSectors[DriveType] * 512, 0 ); 1218 BufferDrive = SelectedDrive; 1219 BufferSide = ReqSide; 1220 BufferTrack = ReqTrack; 1221 copy_buffer (SECTOR_BUFFER (ReqSector), ReqData); 1222 } 1223 } 1224 1225 if (++ReqCnt < blk_rq_cur_sectors(fd_request)) { 1226 /* read next sector */ 1227 setup_req_params( SelectedDrive ); 1228 do_fd_action( SelectedDrive ); 1229 } 1230 else { 1231 /* all sectors finished */ 1232 fd_end_request_cur(BLK_STS_OK); 1233 } 1234 return; 1235 1236 err_end: 1237 BufferDrive = -1; 1238 fd_error(); 1239 } 1240 1241 1242 static void fd_writetrack( void ) 1243 { 1244 unsigned long paddr, flags; 1245 unsigned int track; 1246 1247 DPRINT(("fd_writetrack() Tr=%d Si=%d\n", ReqTrack, ReqSide )); 1248 1249 paddr = PhysTrackBuffer; 1250 dma_cache_maintenance( paddr, BUFFER_SIZE, 1 ); 1251 1252 fd_select_side( ReqSide ); 1253 1254 /* Cheat for track if stretch != 0 */ 1255 if (SUDT->stretch) { 1256 track = FDC_READ( FDCREG_TRACK); 1257 MFPDELAY(); 1258 FDC_WRITE(FDCREG_TRACK,track >> SUDT->stretch); 1259 } 1260 udelay(40); 1261 1262 /* Setup DMA */ 1263 local_irq_save(flags); 1264 dma_wd.dma_lo = (unsigned char)paddr; 1265 MFPDELAY(); 1266 paddr >>= 8; 1267 dma_wd.dma_md = (unsigned char)paddr; 1268 MFPDELAY(); 1269 paddr >>= 8; 1270 if (ATARIHW_PRESENT( EXTD_DMA )) 1271 st_dma_ext_dmahi = (unsigned short)paddr; 1272 else 1273 dma_wd.dma_hi = (unsigned char)paddr; 1274 MFPDELAY(); 1275 local_irq_restore(flags); 1276 1277 /* Clear FIFO and switch DMA to correct mode */ 1278 dma_wd.dma_mode_status = 0x190; 1279 MFPDELAY(); 1280 dma_wd.dma_mode_status = 0x90; 1281 MFPDELAY(); 1282 dma_wd.dma_mode_status = 0x190; 1283 MFPDELAY(); 1284 1285 /* How many sectors for DMA */ 1286 dma_wd.fdc_acces_seccount = BUFFER_SIZE/512; 1287 udelay(40); 1288 1289 /* Start operation */ 1290 dma_wd.dma_mode_status = FDCSELREG_STP | 0x100; 1291 udelay(40); 1292 SET_IRQ_HANDLER( fd_writetrack_done ); 1293 dma_wd.fdc_acces_seccount = FDCCMD_WRTRA | get_head_settle_flag(); 1294 1295 MotorOn = 1; 1296 start_timeout(); 1297 /* wait for interrupt */ 1298 } 1299 1300 1301 static void fd_writetrack_done( int status ) 1302 { 1303 DPRINT(("fd_writetrack_done()\n")); 1304 1305 stop_timeout(); 1306 1307 if (status & FDCSTAT_WPROT) { 1308 printk(KERN_NOTICE "fd%d: is write protected\n", SelectedDrive ); 1309 goto err_end; 1310 } 1311 if (status & FDCSTAT_LOST) { 1312 printk(KERN_ERR "fd%d: lost data (side %d, track %d)\n", 1313 SelectedDrive, ReqSide, ReqTrack ); 1314 goto err_end; 1315 } 1316 1317 complete(&format_wait); 1318 return; 1319 1320 err_end: 1321 fd_error(); 1322 } 1323 1324 static void fd_times_out(struct timer_list *unused) 1325 { 1326 atari_disable_irq( IRQ_MFP_FDC ); 1327 if (!FloppyIRQHandler) goto end; /* int occurred after timer was fired, but 1328 * before we came here... */ 1329 1330 SET_IRQ_HANDLER( NULL ); 1331 /* If the timeout occurred while the readtrack_check timer was 1332 * active, we need to cancel it, else bad things will happen */ 1333 if (UseTrackbuffer) 1334 del_timer( &readtrack_timer ); 1335 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); 1336 udelay( 25 ); 1337 1338 printk(KERN_ERR "floppy timeout\n" ); 1339 fd_error(); 1340 end: 1341 atari_enable_irq( IRQ_MFP_FDC ); 1342 } 1343 1344 1345 /* The (noop) seek operation here is needed to make the WP bit in the 1346 * FDC status register accessible for check_change. If the last disk 1347 * operation would have been a RDSEC, this bit would always read as 0 1348 * no matter what :-( To save time, the seek goes to the track we're 1349 * already on. 1350 */ 1351 1352 static void finish_fdc( void ) 1353 { 1354 if (!NeedSeek) { 1355 finish_fdc_done( 0 ); 1356 } 1357 else { 1358 DPRINT(("finish_fdc: dummy seek started\n")); 1359 FDC_WRITE (FDCREG_DATA, SUD.track); 1360 SET_IRQ_HANDLER( finish_fdc_done ); 1361 FDC_WRITE (FDCREG_CMD, FDCCMD_SEEK); 1362 MotorOn = 1; 1363 start_timeout(); 1364 /* we must wait for the IRQ here, because the ST-DMA 1365 is released immediately afterwards and the interrupt 1366 may be delivered to the wrong driver. */ 1367 } 1368 } 1369 1370 1371 static void finish_fdc_done( int dummy ) 1372 { 1373 unsigned long flags; 1374 1375 DPRINT(("finish_fdc_done entered\n")); 1376 stop_timeout(); 1377 NeedSeek = 0; 1378 1379 if (timer_pending(&fd_timer) && time_before(fd_timer.expires, jiffies + 5)) 1380 /* If the check for a disk change is done too early after this 1381 * last seek command, the WP bit still reads wrong :-(( 1382 */ 1383 mod_timer(&fd_timer, jiffies + 5); 1384 else 1385 start_check_change_timer(); 1386 start_motor_off_timer(); 1387 1388 local_irq_save(flags); 1389 stdma_release(); 1390 local_irq_restore(flags); 1391 1392 DPRINT(("finish_fdc() finished\n")); 1393 } 1394 1395 /* The detection of disk changes is a dark chapter in Atari history :-( 1396 * Because the "Drive ready" signal isn't present in the Atari 1397 * hardware, one has to rely on the "Write Protect". This works fine, 1398 * as long as no write protected disks are used. TOS solves this 1399 * problem by introducing tri-state logic ("maybe changed") and 1400 * looking at the serial number in block 0. This isn't possible for 1401 * Linux, since the floppy driver can't make assumptions about the 1402 * filesystem used on the disk and thus the contents of block 0. I've 1403 * chosen the method to always say "The disk was changed" if it is 1404 * unsure whether it was. This implies that every open or mount 1405 * invalidates the disk buffers if you work with write protected 1406 * disks. But at least this is better than working with incorrect data 1407 * due to unrecognised disk changes. 1408 */ 1409 1410 static unsigned int floppy_check_events(struct gendisk *disk, 1411 unsigned int clearing) 1412 { 1413 struct atari_floppy_struct *p = disk->private_data; 1414 unsigned int drive = p - unit; 1415 if (test_bit (drive, &fake_change)) { 1416 /* simulated change (e.g. after formatting) */ 1417 return DISK_EVENT_MEDIA_CHANGE; 1418 } 1419 if (test_bit (drive, &changed_floppies)) { 1420 /* surely changed (the WP signal changed at least once) */ 1421 return DISK_EVENT_MEDIA_CHANGE; 1422 } 1423 if (UD.wpstat) { 1424 /* WP is on -> could be changed: to be sure, buffers should be 1425 * invalidated... 1426 */ 1427 return DISK_EVENT_MEDIA_CHANGE; 1428 } 1429 1430 return 0; 1431 } 1432 1433 static int floppy_revalidate(struct gendisk *disk) 1434 { 1435 struct atari_floppy_struct *p = disk->private_data; 1436 unsigned int drive = p - unit; 1437 1438 if (test_bit(drive, &changed_floppies) || 1439 test_bit(drive, &fake_change) || 1440 p->disktype == 0) { 1441 if (UD.flags & FTD_MSG) 1442 printk(KERN_ERR "floppy: clear format %p!\n", UDT); 1443 BufferDrive = -1; 1444 clear_bit(drive, &fake_change); 1445 clear_bit(drive, &changed_floppies); 1446 /* MSch: clearing geometry makes sense only for autoprobe 1447 formats, for 'permanent user-defined' parameter: 1448 restore default_params[] here if flagged valid! */ 1449 if (default_params[drive].blocks == 0) 1450 UDT = NULL; 1451 else 1452 UDT = &default_params[drive]; 1453 } 1454 return 0; 1455 } 1456 1457 1458 /* This sets up the global variables describing the current request. */ 1459 1460 static void setup_req_params( int drive ) 1461 { 1462 int block = ReqBlock + ReqCnt; 1463 1464 ReqTrack = block / UDT->spt; 1465 ReqSector = block - ReqTrack * UDT->spt + 1; 1466 ReqSide = ReqTrack & 1; 1467 ReqTrack >>= 1; 1468 ReqData = ReqBuffer + 512 * ReqCnt; 1469 1470 if (UseTrackbuffer) 1471 read_track = (ReqCmd == READ && fd_request->error_count == 0); 1472 else 1473 read_track = 0; 1474 1475 DPRINT(("Request params: Si=%d Tr=%d Se=%d Data=%08lx\n",ReqSide, 1476 ReqTrack, ReqSector, (unsigned long)ReqData )); 1477 } 1478 1479 static void ataflop_commit_rqs(struct blk_mq_hw_ctx *hctx) 1480 { 1481 spin_lock_irq(&ataflop_lock); 1482 atari_disable_irq(IRQ_MFP_FDC); 1483 finish_fdc(); 1484 atari_enable_irq(IRQ_MFP_FDC); 1485 spin_unlock_irq(&ataflop_lock); 1486 } 1487 1488 static blk_status_t ataflop_queue_rq(struct blk_mq_hw_ctx *hctx, 1489 const struct blk_mq_queue_data *bd) 1490 { 1491 struct atari_floppy_struct *floppy = bd->rq->rq_disk->private_data; 1492 int drive = floppy - unit; 1493 int type = floppy->type; 1494 1495 spin_lock_irq(&ataflop_lock); 1496 if (fd_request) { 1497 spin_unlock_irq(&ataflop_lock); 1498 return BLK_STS_DEV_RESOURCE; 1499 } 1500 if (!stdma_try_lock(floppy_irq, NULL)) { 1501 spin_unlock_irq(&ataflop_lock); 1502 return BLK_STS_RESOURCE; 1503 } 1504 fd_request = bd->rq; 1505 blk_mq_start_request(fd_request); 1506 1507 atari_disable_irq( IRQ_MFP_FDC ); 1508 1509 IsFormatting = 0; 1510 1511 if (!UD.connected) { 1512 /* drive not connected */ 1513 printk(KERN_ERR "Unknown Device: fd%d\n", drive ); 1514 fd_end_request_cur(BLK_STS_IOERR); 1515 goto out; 1516 } 1517 1518 if (type == 0) { 1519 if (!UDT) { 1520 Probing = 1; 1521 UDT = atari_disk_type + StartDiskType[DriveType]; 1522 set_capacity(bd->rq->rq_disk, UDT->blocks); 1523 UD.autoprobe = 1; 1524 } 1525 } 1526 else { 1527 /* user supplied disk type */ 1528 if (--type >= NUM_DISK_MINORS) { 1529 printk(KERN_WARNING "fd%d: invalid disk format", drive ); 1530 fd_end_request_cur(BLK_STS_IOERR); 1531 goto out; 1532 } 1533 if (minor2disktype[type].drive_types > DriveType) { 1534 printk(KERN_WARNING "fd%d: unsupported disk format", drive ); 1535 fd_end_request_cur(BLK_STS_IOERR); 1536 goto out; 1537 } 1538 type = minor2disktype[type].index; 1539 UDT = &atari_disk_type[type]; 1540 set_capacity(bd->rq->rq_disk, UDT->blocks); 1541 UD.autoprobe = 0; 1542 } 1543 1544 /* stop deselect timer */ 1545 del_timer( &motor_off_timer ); 1546 1547 ReqCnt = 0; 1548 ReqCmd = rq_data_dir(fd_request); 1549 ReqBlock = blk_rq_pos(fd_request); 1550 ReqBuffer = bio_data(fd_request->bio); 1551 setup_req_params( drive ); 1552 do_fd_action( drive ); 1553 1554 if (bd->last) 1555 finish_fdc(); 1556 atari_enable_irq( IRQ_MFP_FDC ); 1557 1558 out: 1559 spin_unlock_irq(&ataflop_lock); 1560 return BLK_STS_OK; 1561 } 1562 1563 static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, 1564 unsigned int cmd, unsigned long param) 1565 { 1566 struct gendisk *disk = bdev->bd_disk; 1567 struct atari_floppy_struct *floppy = disk->private_data; 1568 int drive = floppy - unit; 1569 int type = floppy->type; 1570 struct atari_format_descr fmt_desc; 1571 struct atari_disk_type *dtp; 1572 struct floppy_struct getprm; 1573 int settype; 1574 struct floppy_struct setprm; 1575 void __user *argp = (void __user *)param; 1576 1577 switch (cmd) { 1578 case FDGETPRM: 1579 if (type) { 1580 if (--type >= NUM_DISK_MINORS) 1581 return -ENODEV; 1582 if (minor2disktype[type].drive_types > DriveType) 1583 return -ENODEV; 1584 type = minor2disktype[type].index; 1585 dtp = &atari_disk_type[type]; 1586 if (UD.flags & FTD_MSG) 1587 printk (KERN_ERR "floppy%d: found dtp %p name %s!\n", 1588 drive, dtp, dtp->name); 1589 } 1590 else { 1591 if (!UDT) 1592 return -ENXIO; 1593 else 1594 dtp = UDT; 1595 } 1596 memset((void *)&getprm, 0, sizeof(getprm)); 1597 getprm.size = dtp->blocks; 1598 getprm.sect = dtp->spt; 1599 getprm.head = 2; 1600 getprm.track = dtp->blocks/dtp->spt/2; 1601 getprm.stretch = dtp->stretch; 1602 if (copy_to_user(argp, &getprm, sizeof(getprm))) 1603 return -EFAULT; 1604 return 0; 1605 } 1606 switch (cmd) { 1607 case FDSETPRM: 1608 case FDDEFPRM: 1609 /* 1610 * MSch 7/96: simple 'set geometry' case: just set the 1611 * 'default' device params (minor == 0). 1612 * Currently, the drive geometry is cleared after each 1613 * disk change and subsequent revalidate()! simple 1614 * implementation of FDDEFPRM: save geometry from a 1615 * FDDEFPRM call and restore it in floppy_revalidate() ! 1616 */ 1617 1618 /* get the parameters from user space */ 1619 if (floppy->ref != 1 && floppy->ref != -1) 1620 return -EBUSY; 1621 if (copy_from_user(&setprm, argp, sizeof(setprm))) 1622 return -EFAULT; 1623 /* 1624 * first of all: check for floppy change and revalidate, 1625 * or the next access will revalidate - and clear UDT :-( 1626 */ 1627 1628 if (floppy_check_events(disk, 0)) 1629 floppy_revalidate(disk); 1630 1631 if (UD.flags & FTD_MSG) 1632 printk (KERN_INFO "floppy%d: setting size %d spt %d str %d!\n", 1633 drive, setprm.size, setprm.sect, setprm.stretch); 1634 1635 /* what if type > 0 here? Overwrite specified entry ? */ 1636 if (type) { 1637 /* refuse to re-set a predefined type for now */ 1638 return -EINVAL; 1639 } 1640 1641 /* 1642 * type == 0: first look for a matching entry in the type list, 1643 * and set the UD.disktype field to use the perdefined entry. 1644 * TODO: add user-defined format to head of autoprobe list ? 1645 * Useful to include the user-type for future autodetection! 1646 */ 1647 1648 for (settype = 0; settype < NUM_DISK_MINORS; settype++) { 1649 int setidx = 0; 1650 if (minor2disktype[settype].drive_types > DriveType) { 1651 /* skip this one, invalid for drive ... */ 1652 continue; 1653 } 1654 setidx = minor2disktype[settype].index; 1655 dtp = &atari_disk_type[setidx]; 1656 1657 /* found matching entry ?? */ 1658 if ( dtp->blocks == setprm.size 1659 && dtp->spt == setprm.sect 1660 && dtp->stretch == setprm.stretch ) { 1661 if (UD.flags & FTD_MSG) 1662 printk (KERN_INFO "floppy%d: setting %s %p!\n", 1663 drive, dtp->name, dtp); 1664 UDT = dtp; 1665 set_capacity(disk, UDT->blocks); 1666 1667 if (cmd == FDDEFPRM) { 1668 /* save settings as permanent default type */ 1669 default_params[drive].name = dtp->name; 1670 default_params[drive].spt = dtp->spt; 1671 default_params[drive].blocks = dtp->blocks; 1672 default_params[drive].fdc_speed = dtp->fdc_speed; 1673 default_params[drive].stretch = dtp->stretch; 1674 } 1675 1676 return 0; 1677 } 1678 1679 } 1680 1681 /* no matching disk type found above - setting user_params */ 1682 1683 if (cmd == FDDEFPRM) { 1684 /* set permanent type */ 1685 dtp = &default_params[drive]; 1686 } else 1687 /* set user type (reset by disk change!) */ 1688 dtp = &user_params[drive]; 1689 1690 dtp->name = "user format"; 1691 dtp->blocks = setprm.size; 1692 dtp->spt = setprm.sect; 1693 if (setprm.sect > 14) 1694 dtp->fdc_speed = 3; 1695 else 1696 dtp->fdc_speed = 0; 1697 dtp->stretch = setprm.stretch; 1698 1699 if (UD.flags & FTD_MSG) 1700 printk (KERN_INFO "floppy%d: blk %d spt %d str %d!\n", 1701 drive, dtp->blocks, dtp->spt, dtp->stretch); 1702 1703 /* sanity check */ 1704 if (setprm.track != dtp->blocks/dtp->spt/2 || 1705 setprm.head != 2) 1706 return -EINVAL; 1707 1708 UDT = dtp; 1709 set_capacity(disk, UDT->blocks); 1710 1711 return 0; 1712 case FDMSGON: 1713 UD.flags |= FTD_MSG; 1714 return 0; 1715 case FDMSGOFF: 1716 UD.flags &= ~FTD_MSG; 1717 return 0; 1718 case FDSETEMSGTRESH: 1719 return -EINVAL; 1720 case FDFMTBEG: 1721 return 0; 1722 case FDFMTTRK: 1723 if (floppy->ref != 1 && floppy->ref != -1) 1724 return -EBUSY; 1725 if (copy_from_user(&fmt_desc, argp, sizeof(fmt_desc))) 1726 return -EFAULT; 1727 return do_format(drive, type, &fmt_desc); 1728 case FDCLRPRM: 1729 UDT = NULL; 1730 /* MSch: invalidate default_params */ 1731 default_params[drive].blocks = 0; 1732 set_capacity(disk, MAX_DISK_SIZE * 2); 1733 fallthrough; 1734 case FDFMTEND: 1735 case FDFLUSH: 1736 /* invalidate the buffer track to force a reread */ 1737 BufferDrive = -1; 1738 set_bit(drive, &fake_change); 1739 if (bdev_check_media_change(bdev)) 1740 floppy_revalidate(bdev->bd_disk); 1741 return 0; 1742 default: 1743 return -EINVAL; 1744 } 1745 } 1746 1747 static int fd_ioctl(struct block_device *bdev, fmode_t mode, 1748 unsigned int cmd, unsigned long arg) 1749 { 1750 int ret; 1751 1752 mutex_lock(&ataflop_mutex); 1753 ret = fd_locked_ioctl(bdev, mode, cmd, arg); 1754 mutex_unlock(&ataflop_mutex); 1755 1756 return ret; 1757 } 1758 1759 /* Initialize the 'unit' variable for drive 'drive' */ 1760 1761 static void __init fd_probe( int drive ) 1762 { 1763 UD.connected = 0; 1764 UDT = NULL; 1765 1766 if (!fd_test_drive_present( drive )) 1767 return; 1768 1769 UD.connected = 1; 1770 UD.track = 0; 1771 switch( UserSteprate[drive] ) { 1772 case 2: 1773 UD.steprate = FDCSTEP_2; 1774 break; 1775 case 3: 1776 UD.steprate = FDCSTEP_3; 1777 break; 1778 case 6: 1779 UD.steprate = FDCSTEP_6; 1780 break; 1781 case 12: 1782 UD.steprate = FDCSTEP_12; 1783 break; 1784 default: /* should be -1 for "not set by user" */ 1785 if (ATARIHW_PRESENT( FDCSPEED ) || MACH_IS_MEDUSA) 1786 UD.steprate = FDCSTEP_3; 1787 else 1788 UD.steprate = FDCSTEP_6; 1789 break; 1790 } 1791 MotorOn = 1; /* from probe restore operation! */ 1792 } 1793 1794 1795 /* This function tests the physical presence of a floppy drive (not 1796 * whether a disk is inserted). This is done by issuing a restore 1797 * command, waiting max. 2 seconds (that should be enough to move the 1798 * head across the whole disk) and looking at the state of the "TR00" 1799 * signal. This should now be raised if there is a drive connected 1800 * (and there is no hardware failure :-) Otherwise, the drive is 1801 * declared absent. 1802 */ 1803 1804 static int __init fd_test_drive_present( int drive ) 1805 { 1806 unsigned long timeout; 1807 unsigned char status; 1808 int ok; 1809 1810 if (drive >= (MACH_IS_FALCON ? 1 : 2)) return( 0 ); 1811 fd_select_drive( drive ); 1812 1813 /* disable interrupt temporarily */ 1814 atari_turnoff_irq( IRQ_MFP_FDC ); 1815 FDC_WRITE (FDCREG_TRACK, 0xff00); 1816 FDC_WRITE( FDCREG_CMD, FDCCMD_RESTORE | FDCCMDADD_H | FDCSTEP_6 ); 1817 1818 timeout = jiffies + 2*HZ+HZ/2; 1819 while (time_before(jiffies, timeout)) 1820 if (!(st_mfp.par_dt_reg & 0x20)) 1821 break; 1822 1823 status = FDC_READ( FDCREG_STATUS ); 1824 ok = (status & FDCSTAT_TR00) != 0; 1825 1826 /* force interrupt to abort restore operation (FDC would try 1827 * about 50 seconds!) */ 1828 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); 1829 udelay(500); 1830 status = FDC_READ( FDCREG_STATUS ); 1831 udelay(20); 1832 1833 if (ok) { 1834 /* dummy seek command to make WP bit accessible */ 1835 FDC_WRITE( FDCREG_DATA, 0 ); 1836 FDC_WRITE( FDCREG_CMD, FDCCMD_SEEK ); 1837 while( st_mfp.par_dt_reg & 0x20 ) 1838 ; 1839 status = FDC_READ( FDCREG_STATUS ); 1840 } 1841 1842 atari_turnon_irq( IRQ_MFP_FDC ); 1843 return( ok ); 1844 } 1845 1846 1847 /* Look how many and which kind of drives are connected. If there are 1848 * floppies, additionally start the disk-change and motor-off timers. 1849 */ 1850 1851 static void __init config_types( void ) 1852 { 1853 int drive, cnt = 0; 1854 1855 /* for probing drives, set the FDC speed to 8 MHz */ 1856 if (ATARIHW_PRESENT(FDCSPEED)) 1857 dma_wd.fdc_speed = 0; 1858 1859 printk(KERN_INFO "Probing floppy drive(s):\n"); 1860 for( drive = 0; drive < FD_MAX_UNITS; drive++ ) { 1861 fd_probe( drive ); 1862 if (UD.connected) { 1863 printk(KERN_INFO "fd%d\n", drive); 1864 ++cnt; 1865 } 1866 } 1867 1868 if (FDC_READ( FDCREG_STATUS ) & FDCSTAT_BUSY) { 1869 /* If FDC is still busy from probing, give it another FORCI 1870 * command to abort the operation. If this isn't done, the FDC 1871 * will interrupt later and its IRQ line stays low, because 1872 * the status register isn't read. And this will block any 1873 * interrupts on this IRQ line :-( 1874 */ 1875 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); 1876 udelay(500); 1877 FDC_READ( FDCREG_STATUS ); 1878 udelay(20); 1879 } 1880 1881 if (cnt > 0) { 1882 start_motor_off_timer(); 1883 if (cnt == 1) fd_select_drive( 0 ); 1884 start_check_change_timer(); 1885 } 1886 } 1887 1888 /* 1889 * floppy_open check for aliasing (/dev/fd0 can be the same as 1890 * /dev/PS0 etc), and disallows simultaneous access to the same 1891 * drive with different device numbers. 1892 */ 1893 1894 static int floppy_open(struct block_device *bdev, fmode_t mode) 1895 { 1896 struct atari_floppy_struct *p = bdev->bd_disk->private_data; 1897 int type = MINOR(bdev->bd_dev) >> 2; 1898 1899 DPRINT(("fd_open: type=%d\n",type)); 1900 if (p->ref && p->type != type) 1901 return -EBUSY; 1902 1903 if (p->ref == -1 || (p->ref && mode & FMODE_EXCL)) 1904 return -EBUSY; 1905 1906 if (mode & FMODE_EXCL) 1907 p->ref = -1; 1908 else 1909 p->ref++; 1910 1911 p->type = type; 1912 1913 if (mode & FMODE_NDELAY) 1914 return 0; 1915 1916 if (mode & (FMODE_READ|FMODE_WRITE)) { 1917 if (bdev_check_media_change(bdev)) 1918 floppy_revalidate(bdev->bd_disk); 1919 if (mode & FMODE_WRITE) { 1920 if (p->wpstat) { 1921 if (p->ref < 0) 1922 p->ref = 0; 1923 else 1924 p->ref--; 1925 return -EROFS; 1926 } 1927 } 1928 } 1929 return 0; 1930 } 1931 1932 static int floppy_unlocked_open(struct block_device *bdev, fmode_t mode) 1933 { 1934 int ret; 1935 1936 mutex_lock(&ataflop_mutex); 1937 ret = floppy_open(bdev, mode); 1938 mutex_unlock(&ataflop_mutex); 1939 1940 return ret; 1941 } 1942 1943 static void floppy_release(struct gendisk *disk, fmode_t mode) 1944 { 1945 struct atari_floppy_struct *p = disk->private_data; 1946 mutex_lock(&ataflop_mutex); 1947 if (p->ref < 0) 1948 p->ref = 0; 1949 else if (!p->ref--) { 1950 printk(KERN_ERR "floppy_release with fd_ref == 0"); 1951 p->ref = 0; 1952 } 1953 mutex_unlock(&ataflop_mutex); 1954 } 1955 1956 static const struct block_device_operations floppy_fops = { 1957 .owner = THIS_MODULE, 1958 .open = floppy_unlocked_open, 1959 .release = floppy_release, 1960 .ioctl = fd_ioctl, 1961 .check_events = floppy_check_events, 1962 }; 1963 1964 static const struct blk_mq_ops ataflop_mq_ops = { 1965 .queue_rq = ataflop_queue_rq, 1966 .commit_rqs = ataflop_commit_rqs, 1967 }; 1968 1969 static int ataflop_alloc_disk(unsigned int drive, unsigned int type) 1970 { 1971 struct gendisk *disk; 1972 int ret; 1973 1974 disk = alloc_disk(1); 1975 if (!disk) 1976 return -ENOMEM; 1977 1978 disk->queue = blk_mq_init_queue(&unit[drive].tag_set); 1979 if (IS_ERR(disk->queue)) { 1980 ret = PTR_ERR(disk->queue); 1981 disk->queue = NULL; 1982 put_disk(disk); 1983 return ret; 1984 } 1985 1986 disk->major = FLOPPY_MAJOR; 1987 disk->first_minor = drive + (type << 2); 1988 sprintf(disk->disk_name, "fd%d", drive); 1989 disk->fops = &floppy_fops; 1990 disk->events = DISK_EVENT_MEDIA_CHANGE; 1991 disk->private_data = &unit[drive]; 1992 set_capacity(disk, MAX_DISK_SIZE * 2); 1993 1994 unit[drive].disk[type] = disk; 1995 return 0; 1996 } 1997 1998 static DEFINE_MUTEX(ataflop_probe_lock); 1999 2000 static void ataflop_probe(dev_t dev) 2001 { 2002 int drive = MINOR(dev) & 3; 2003 int type = MINOR(dev) >> 2; 2004 2005 if (drive >= FD_MAX_UNITS || type > NUM_DISK_MINORS) 2006 return; 2007 mutex_lock(&ataflop_probe_lock); 2008 if (!unit[drive].disk[type]) { 2009 if (ataflop_alloc_disk(drive, type) == 0) 2010 add_disk(unit[drive].disk[type]); 2011 } 2012 mutex_unlock(&ataflop_probe_lock); 2013 } 2014 2015 static int __init atari_floppy_init (void) 2016 { 2017 int i; 2018 int ret; 2019 2020 if (!MACH_IS_ATARI) 2021 /* Amiga, Mac, ... don't have Atari-compatible floppy :-) */ 2022 return -ENODEV; 2023 2024 mutex_lock(&ataflop_probe_lock); 2025 ret = __register_blkdev(FLOPPY_MAJOR, "fd", ataflop_probe); 2026 if (ret) 2027 goto out_unlock; 2028 2029 for (i = 0; i < FD_MAX_UNITS; i++) { 2030 memset(&unit[i].tag_set, 0, sizeof(unit[i].tag_set)); 2031 unit[i].tag_set.ops = &ataflop_mq_ops; 2032 unit[i].tag_set.nr_hw_queues = 1; 2033 unit[i].tag_set.nr_maps = 1; 2034 unit[i].tag_set.queue_depth = 2; 2035 unit[i].tag_set.numa_node = NUMA_NO_NODE; 2036 unit[i].tag_set.flags = BLK_MQ_F_SHOULD_MERGE; 2037 ret = blk_mq_alloc_tag_set(&unit[i].tag_set); 2038 if (ret) 2039 goto err; 2040 2041 ret = ataflop_alloc_disk(i, 0); 2042 if (ret) { 2043 blk_mq_free_tag_set(&unit[i].tag_set); 2044 goto err; 2045 } 2046 } 2047 2048 if (UseTrackbuffer < 0) 2049 /* not set by user -> use default: for now, we turn 2050 track buffering off for all Medusas, though it 2051 could be used with ones that have a counter 2052 card. But the test is too hard :-( */ 2053 UseTrackbuffer = !MACH_IS_MEDUSA; 2054 2055 /* initialize variables */ 2056 SelectedDrive = -1; 2057 BufferDrive = -1; 2058 2059 DMABuffer = atari_stram_alloc(BUFFER_SIZE+512, "ataflop"); 2060 if (!DMABuffer) { 2061 printk(KERN_ERR "atari_floppy_init: cannot get dma buffer\n"); 2062 ret = -ENOMEM; 2063 goto err; 2064 } 2065 TrackBuffer = DMABuffer + 512; 2066 PhysDMABuffer = atari_stram_to_phys(DMABuffer); 2067 PhysTrackBuffer = virt_to_phys(TrackBuffer); 2068 BufferDrive = BufferSide = BufferTrack = -1; 2069 2070 for (i = 0; i < FD_MAX_UNITS; i++) { 2071 unit[i].track = -1; 2072 unit[i].flags = 0; 2073 add_disk(unit[i].disk[0]); 2074 } 2075 2076 printk(KERN_INFO "Atari floppy driver: max. %cD, %strack buffering\n", 2077 DriveType == 0 ? 'D' : DriveType == 1 ? 'H' : 'E', 2078 UseTrackbuffer ? "" : "no "); 2079 config_types(); 2080 2081 return 0; 2082 2083 err: 2084 while (--i >= 0) { 2085 blk_cleanup_queue(unit[i].disk[0]->queue); 2086 put_disk(unit[i].disk[0]); 2087 blk_mq_free_tag_set(&unit[i].tag_set); 2088 } 2089 2090 unregister_blkdev(FLOPPY_MAJOR, "fd"); 2091 out_unlock: 2092 mutex_unlock(&ataflop_probe_lock); 2093 return ret; 2094 } 2095 2096 #ifndef MODULE 2097 static int __init atari_floppy_setup(char *str) 2098 { 2099 int ints[3 + FD_MAX_UNITS]; 2100 int i; 2101 2102 if (!MACH_IS_ATARI) 2103 return 0; 2104 2105 str = get_options(str, 3 + FD_MAX_UNITS, ints); 2106 2107 if (ints[0] < 1) { 2108 printk(KERN_ERR "ataflop_setup: no arguments!\n" ); 2109 return 0; 2110 } 2111 else if (ints[0] > 2+FD_MAX_UNITS) { 2112 printk(KERN_ERR "ataflop_setup: too many arguments\n" ); 2113 } 2114 2115 if (ints[1] < 0 || ints[1] > 2) 2116 printk(KERN_ERR "ataflop_setup: bad drive type\n" ); 2117 else 2118 DriveType = ints[1]; 2119 2120 if (ints[0] >= 2) 2121 UseTrackbuffer = (ints[2] > 0); 2122 2123 for( i = 3; i <= ints[0] && i-3 < FD_MAX_UNITS; ++i ) { 2124 if (ints[i] != 2 && ints[i] != 3 && ints[i] != 6 && ints[i] != 12) 2125 printk(KERN_ERR "ataflop_setup: bad steprate\n" ); 2126 else 2127 UserSteprate[i-3] = ints[i]; 2128 } 2129 return 1; 2130 } 2131 2132 __setup("floppy=", atari_floppy_setup); 2133 #endif 2134 2135 static void __exit atari_floppy_exit(void) 2136 { 2137 int i, type; 2138 2139 for (i = 0; i < FD_MAX_UNITS; i++) { 2140 for (type = 0; type < NUM_DISK_MINORS; type++) { 2141 if (!unit[i].disk[type]) 2142 continue; 2143 del_gendisk(unit[i].disk[type]); 2144 blk_cleanup_queue(unit[i].disk[type]->queue); 2145 put_disk(unit[i].disk[type]); 2146 } 2147 blk_mq_free_tag_set(&unit[i].tag_set); 2148 } 2149 unregister_blkdev(FLOPPY_MAJOR, "fd"); 2150 2151 del_timer_sync(&fd_timer); 2152 atari_stram_free( DMABuffer ); 2153 } 2154 2155 module_init(atari_floppy_init) 2156 module_exit(atari_floppy_exit) 2157 2158 MODULE_LICENSE("GPL"); 2159