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1.1 ! root 1: /* ! 2: * linux/kernel/floppy.c ! 3: * ! 4: * Copyright (C) 1991, 1992 Linus Torvalds ! 5: * Copyright (C) 1993, 1994 Alain Knaff ! 6: */ ! 7: /* ! 8: * 02.12.91 - Changed to static variables to indicate need for reset ! 9: * and recalibrate. This makes some things easier (output_byte reset ! 10: * checking etc), and means less interrupt jumping in case of errors, ! 11: * so the code is hopefully easier to understand. ! 12: */ ! 13: ! 14: /* ! 15: * This file is certainly a mess. I've tried my best to get it working, ! 16: * but I don't like programming floppies, and I have only one anyway. ! 17: * Urgel. I should check for more errors, and do more graceful error ! 18: * recovery. Seems there are problems with several drives. I've tried to ! 19: * correct them. No promises. ! 20: */ ! 21: ! 22: /* ! 23: * As with hd.c, all routines within this file can (and will) be called ! 24: * by interrupts, so extreme caution is needed. A hardware interrupt ! 25: * handler may not sleep, or a kernel panic will happen. Thus I cannot ! 26: * call "floppy-on" directly, but have to set a special timer interrupt ! 27: * etc. ! 28: */ ! 29: ! 30: /* ! 31: * 28.02.92 - made track-buffering routines, based on the routines written ! 32: * by [email protected] (Lawrence Foard). Linus. ! 33: */ ! 34: ! 35: /* ! 36: * Automatic floppy-detection and formatting written by Werner Almesberger ! 37: * ([email protected]), who also corrected some problems with ! 38: * the floppy-change signal detection. ! 39: */ ! 40: ! 41: /* ! 42: * 1992/7/22 -- Hennus Bergman: Added better error reporting, fixed ! 43: * FDC data overrun bug, added some preliminary stuff for vertical ! 44: * recording support. ! 45: * ! 46: * 1992/9/17: Added DMA allocation & DMA functions. -- hhb. ! 47: * ! 48: * TODO: Errors are still not counted properly. ! 49: */ ! 50: ! 51: /* 1992/9/20 ! 52: * Modifications for ``Sector Shifting'' by Rob Hooft ([email protected]) ! 53: * modelled after the freeware MS/DOS program fdformat/88 V1.8 by ! 54: * Christoph H. Hochst\"atter. ! 55: * I have fixed the shift values to the ones I always use. Maybe a new ! 56: * ioctl() should be created to be able to modify them. ! 57: * There is a bug in the driver that makes it impossible to format a ! 58: * floppy as the first thing after bootup. ! 59: */ ! 60: ! 61: /* ! 62: * 1993/4/29 -- Linus -- cleaned up the timer handling in the kernel, and ! 63: * this helped the floppy driver as well. Much cleaner, and still seems to ! 64: * work. ! 65: */ ! 66: ! 67: /* 1994/6/24 --bbroad-- added the floppy table entries and made ! 68: * minor modifications to allow 2.88 floppies to be run. ! 69: */ ! 70: ! 71: /* 1994/7/13 -- Paul Vojta -- modified the probing code to allow three or more ! 72: * disk types. ! 73: */ ! 74: ! 75: /* ! 76: * 1994/8/8 -- Alain Knaff -- Switched to fdpatch driver: Support for bigger ! 77: * format bug fixes, but unfortunately some new bugs too... ! 78: */ ! 79: ! 80: /* 1994/9/17 -- Koen Holtman -- added logging of physical floppy write ! 81: * errors to allow safe writing by specialized programs. ! 82: */ ! 83: ! 84: /* 1995/4/24 -- Dan Fandrich -- added support for Commodore 1581 3.5" disks ! 85: * by defining bit 1 of the "stretch" parameter to mean put sectors on the ! 86: * opposite side of the disk, leaving the sector IDs alone (i.e. Commodore's ! 87: * drives are "upside-down"). ! 88: */ ! 89: ! 90: /* ! 91: * 1995/8/26 -- Andreas Busse -- added Mips support. ! 92: */ ! 93: ! 94: /* ! 95: * 1995/10/18 -- Ralf Baechle -- Portability cleanup; move machine dependend ! 96: * features to asm/floppy.h. ! 97: */ ! 98: ! 99: ! 100: #define FLOPPY_SANITY_CHECK ! 101: #undef FLOPPY_SILENT_DCL_CLEAR ! 102: ! 103: #define REALLY_SLOW_IO ! 104: ! 105: #define DEBUGT 2 ! 106: #define DCL_DEBUG /* debug disk change line */ ! 107: ! 108: /* do print messages for unexpected interrupts */ ! 109: static int print_unex=1; ! 110: #include <linux/utsname.h> ! 111: #include <linux/module.h> ! 112: ! 113: /* the following is the mask of allowed drives. By default units 2 and ! 114: * 3 of both floppy controllers are disabled, because switching on the ! 115: * motor of these drives causes system hangs on some PCI computers. drive ! 116: * 0 is the low bit (0x1), and drive 7 is the high bit (0x80). Bits are on if ! 117: * a drive is allowed. */ ! 118: static int FLOPPY_IRQ=6; ! 119: static int FLOPPY_DMA=2; ! 120: static int allowed_drive_mask = 0x33; ! 121: ! 122: ! 123: #include <linux/sched.h> ! 124: #include <linux/fs.h> ! 125: #include <linux/kernel.h> ! 126: #include <linux/timer.h> ! 127: #include <linux/tqueue.h> ! 128: #define FDPATCHES ! 129: #include <linux/fdreg.h> ! 130: ! 131: ! 132: #include <linux/fd.h> ! 133: ! 134: ! 135: #define OLDFDRAWCMD 0x020d /* send a raw command to the fdc */ ! 136: ! 137: struct old_floppy_raw_cmd { ! 138: void *data; ! 139: long length; ! 140: ! 141: unsigned char rate; ! 142: unsigned char flags; ! 143: unsigned char cmd_count; ! 144: unsigned char cmd[9]; ! 145: unsigned char reply_count; ! 146: unsigned char reply[7]; ! 147: int track; ! 148: }; ! 149: ! 150: #include <linux/errno.h> ! 151: #include <linux/malloc.h> ! 152: #include <linux/mm.h> ! 153: #include <linux/string.h> ! 154: #include <linux/fcntl.h> ! 155: #include <linux/delay.h> ! 156: #include <linux/mc146818rtc.h> /* CMOS defines */ ! 157: #include <linux/ioport.h> ! 158: ! 159: #include <asm/dma.h> ! 160: #include <asm/floppy.h> ! 161: #include <asm/irq.h> ! 162: #include <asm/system.h> ! 163: #include <asm/io.h> ! 164: #include <asm/segment.h> ! 165: ! 166: #define MAJOR_NR FLOPPY_MAJOR ! 167: ! 168: #include <linux/blk.h> ! 169: ! 170: ! 171: /* Dma Memory related stuff */ ! 172: ! 173: /* Pure 2^n version of get_order */ ! 174: static inline int __get_order (int size) ! 175: { ! 176: int order; ! 177: ! 178: #ifdef _ASM_IO_H2 ! 179: __asm__ __volatile__("bsr %1,%0" ! 180: : "=r" (order) ! 181: : "r" (size / PAGE_SIZE)); ! 182: #else ! 183: for (order = 0; order < NR_MEM_LISTS; ++order) ! 184: if (size <= (PAGE_SIZE << order)) ! 185: return order; ! 186: #endif ! 187: return NR_MEM_LISTS; ! 188: } ! 189: ! 190: static unsigned long dma_mem_alloc(int size) ! 191: { ! 192: int order = __get_order(size); ! 193: ! 194: if (order >= NR_MEM_LISTS) ! 195: return(0); ! 196: return __get_dma_pages(GFP_KERNEL,order); ! 197: } ! 198: ! 199: /* End dma memory related stuff */ ! 200: ! 201: static unsigned int fake_change = 0; ! 202: static int initialising=1; ! 203: ! 204: static inline int TYPE(kdev_t x) { ! 205: return (MINOR(x)>>2) & 0x1f; ! 206: } ! 207: static inline int DRIVE(kdev_t x) { ! 208: return (MINOR(x)&0x03) | ((MINOR(x)&0x80) >> 5); ! 209: } ! 210: #define ITYPE(x) (((x)>>2) & 0x1f) ! 211: #define TOMINOR(x) ((x & 3) | ((x & 4) << 5)) ! 212: #define UNIT(x) ((x) & 0x03) /* drive on fdc */ ! 213: #define FDC(x) (((x) & 0x04) >> 2) /* fdc of drive */ ! 214: #define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2)) ! 215: /* reverse mapping from unit and fdc to drive */ ! 216: #define DP (&drive_params[current_drive]) ! 217: #define DRS (&drive_state[current_drive]) ! 218: #define DRWE (&write_errors[current_drive]) ! 219: #define FDCS (&fdc_state[fdc]) ! 220: #define CLEARF(x) (clear_bit(x##_BIT, &DRS->flags)) ! 221: #define SETF(x) (set_bit(x##_BIT, &DRS->flags)) ! 222: #define TESTF(x) (test_bit(x##_BIT, &DRS->flags)) ! 223: ! 224: #define UDP (&drive_params[drive]) ! 225: #define UDRS (&drive_state[drive]) ! 226: #define UDRWE (&write_errors[drive]) ! 227: #define UFDCS (&fdc_state[FDC(drive)]) ! 228: #define UCLEARF(x) (clear_bit(x##_BIT, &UDRS->flags)) ! 229: #define USETF(x) (set_bit(x##_BIT, &UDRS->flags)) ! 230: #define UTESTF(x) (test_bit(x##_BIT, &UDRS->flags)) ! 231: ! 232: #define DPRINT(x) printk(DEVICE_NAME "%d: " x,current_drive) ! 233: ! 234: #define DPRINT1(x,x1) printk(DEVICE_NAME "%d: " x,current_drive,(x1)) ! 235: ! 236: #define DPRINT2(x,x1,x2) printk(DEVICE_NAME "%d: " x,current_drive,(x1),(x2)) ! 237: ! 238: #define DPRINT3(x,x1,x2,x3) printk(DEVICE_NAME "%d: " x,current_drive,(x1),(x2),(x3)) ! 239: ! 240: #define PH_HEAD(floppy,head) (((((floppy)->stretch & 2) >>1) ^ head) << 2) ! 241: #define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH) ! 242: ! 243: #define CLEARSTRUCT(x) memset((x), 0, sizeof(*(x))) ! 244: ! 245: /* read/write */ ! 246: #define COMMAND raw_cmd->cmd[0] ! 247: #define DR_SELECT raw_cmd->cmd[1] ! 248: #define TRACK raw_cmd->cmd[2] ! 249: #define HEAD raw_cmd->cmd[3] ! 250: #define SECTOR raw_cmd->cmd[4] ! 251: #define SIZECODE raw_cmd->cmd[5] ! 252: #define SECT_PER_TRACK raw_cmd->cmd[6] ! 253: #define GAP raw_cmd->cmd[7] ! 254: #define SIZECODE2 raw_cmd->cmd[8] ! 255: #define NR_RW 9 ! 256: ! 257: /* format */ ! 258: #define F_SIZECODE raw_cmd->cmd[2] ! 259: #define F_SECT_PER_TRACK raw_cmd->cmd[3] ! 260: #define F_GAP raw_cmd->cmd[4] ! 261: #define F_FILL raw_cmd->cmd[5] ! 262: #define NR_F 6 ! 263: ! 264: /* ! 265: * Maximum disk size (in kilobytes). This default is used whenever the ! 266: * current disk size is unknown. ! 267: * [Now it is rather a minimum] ! 268: */ ! 269: #define MAX_DISK_SIZE 2 /* 3984*/ ! 270: ! 271: #define K_64 0x10000 /* 64KB */ ! 272: ! 273: /* ! 274: * globals used by 'result()' ! 275: */ ! 276: #define MAX_REPLIES 17 ! 277: static unsigned char reply_buffer[MAX_REPLIES]; ! 278: static int inr; /* size of reply buffer, when called from interrupt */ ! 279: #define ST0 (reply_buffer[0]) ! 280: #define ST1 (reply_buffer[1]) ! 281: #define ST2 (reply_buffer[2]) ! 282: #define ST3 (reply_buffer[0]) /* result of GETSTATUS */ ! 283: #define R_TRACK (reply_buffer[3]) ! 284: #define R_HEAD (reply_buffer[4]) ! 285: #define R_SECTOR (reply_buffer[5]) ! 286: #define R_SIZECODE (reply_buffer[6]) ! 287: ! 288: #define SEL_DLY (2*HZ/100) ! 289: ! 290: #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) ! 291: /* ! 292: * this struct defines the different floppy drive types. ! 293: */ ! 294: static struct { ! 295: struct floppy_drive_params params; ! 296: const char *name; /* name printed while booting */ ! 297: } default_drive_params[]= { ! 298: /* NOTE: the time values in jiffies should be in msec! ! 299: CMOS drive type ! 300: | Maximum data rate supported by drive type ! 301: | | Head load time, msec ! 302: | | | Head unload time, msec (not used) ! 303: | | | | Step rate interval, usec ! 304: | | | | | Time needed for spinup time (jiffies) ! 305: | | | | | | Timeout for spinning down (jiffies) ! 306: | | | | | | | Spindown offset (where disk stops) ! 307: | | | | | | | | Select delay ! 308: | | | | | | | | | RPS ! 309: | | | | | | | | | | Max number of tracks ! 310: | | | | | | | | | | | Interrupt timeout ! 311: | | | | | | | | | | | | Max nonintlv. sectors ! 312: | | | | | | | | | | | | | -Max Errors- flags */ ! 313: {{0, 500, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 80, 3*HZ, 20, {3,1,2,0,2}, 0, ! 314: 0, { 7, 4, 8, 2, 1, 5, 3,10}, 3*HZ/2, 0 }, "unknown" }, ! 315: ! 316: {{1, 300, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 40, 3*HZ, 17, {3,1,2,0,2}, 0, ! 317: 0, { 1, 0, 0, 0, 0, 0, 0, 0}, 3*HZ/2, 1 }, "360K PC" }, /*5 1/4 360 KB PC*/ ! 318: ! 319: {{2, 500, 16, 16, 6000, 4*HZ/10, 3*HZ, 14, SEL_DLY, 6, 83, 3*HZ, 17, {3,1,2,0,2}, 0, ! 320: 0, { 2, 5, 6,23,10,20,11, 0}, 3*HZ/2, 2 }, "1.2M" }, /*5 1/4 HD AT*/ ! 321: ! 322: {{3, 250, 16, 16, 3000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0, ! 323: 0, { 4,22,21,30, 3, 0, 0, 0}, 3*HZ/2, 4 }, "720k" }, /*3 1/2 DD*/ ! 324: ! 325: {{4, 500, 16, 16, 4000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0, ! 326: 0, { 7, 4,25,22,31,21,29,11}, 3*HZ/2, 7 }, "1.44M" }, /*3 1/2 HD*/ ! 327: ! 328: {{5, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0, ! 329: 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M AMI BIOS" }, /*3 1/2 ED*/ ! 330: ! 331: {{6, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0, ! 332: 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M" } /*3 1/2 ED*/ ! 333: /* | --autodetected formats--- | | | ! 334: * read_track | | Name printed when booting ! 335: * | Native format ! 336: * Frequency of disk change checks */ ! 337: }; ! 338: ! 339: static struct floppy_drive_params drive_params[N_DRIVE]; ! 340: static struct floppy_drive_struct drive_state[N_DRIVE]; ! 341: static struct floppy_write_errors write_errors[N_DRIVE]; ! 342: static struct floppy_raw_cmd *raw_cmd, default_raw_cmd; ! 343: ! 344: /* ! 345: * This struct defines the different floppy types. ! 346: * ! 347: * Bit 0 of 'stretch' tells if the tracks need to be doubled for some ! 348: * types (e.g. 360kB diskette in 1.2MB drive, etc.). Bit 1 of 'stretch' ! 349: * tells if the disk is in Commodore 1581 format, which means side 0 sectors ! 350: * are located on side 1 of the disk but with a side 0 ID, and vice-versa. ! 351: * This is the same as the Sharp MZ-80 5.25" CP/M disk format, except that the ! 352: * 1581's logical side 0 is on physical side 1, whereas the Sharp's logical ! 353: * side 0 is on physical side 0 (but with the misnamed sector IDs). ! 354: * 'stretch' should probably be renamed to something more general, like ! 355: * 'options'. Other parameters should be self-explanatory (see also ! 356: * setfdprm(8)). ! 357: */ ! 358: static struct floppy_struct floppy_type[32] = { ! 359: { 0, 0,0, 0,0,0x00,0x00,0x00,0x00,NULL }, /* 0 no testing */ ! 360: { 720, 9,2,40,0,0x2A,0x02,0xDF,0x50,"d360" }, /* 1 360KB PC */ ! 361: { 2400,15,2,80,0,0x1B,0x00,0xDF,0x54,"h1200" }, /* 2 1.2MB AT */ ! 362: { 720, 9,1,80,0,0x2A,0x02,0xDF,0x50,"D360" }, /* 3 360KB SS 3.5" */ ! 363: { 1440, 9,2,80,0,0x2A,0x02,0xDF,0x50,"D720" }, /* 4 720KB 3.5" */ ! 364: { 720, 9,2,40,1,0x23,0x01,0xDF,0x50,"h360" }, /* 5 360KB AT */ ! 365: { 1440, 9,2,80,0,0x23,0x01,0xDF,0x50,"h720" }, /* 6 720KB AT */ ! 366: { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,"H1440" }, /* 7 1.44MB 3.5" */ ! 367: { 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"E2880" }, /* 8 2.88MB 3.5" */ ! 368: { 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"CompaQ"}, /* 9 2.88MB 3.5" */ ! 369: ! 370: { 2880,18,2,80,0,0x25,0x00,0xDF,0x02,"h1440" }, /* 10 1.44MB 5.25" */ ! 371: { 3360,21,2,80,0,0x1C,0x00,0xCF,0x0C,"H1680" }, /* 11 1.68MB 3.5" */ ! 372: { 820,10,2,41,1,0x25,0x01,0xDF,0x2E,"h410" }, /* 12 410KB 5.25" */ ! 373: { 1640,10,2,82,0,0x25,0x02,0xDF,0x2E,"H820" }, /* 13 820KB 3.5" */ ! 374: { 2952,18,2,82,0,0x25,0x00,0xDF,0x02,"h1476" }, /* 14 1.48MB 5.25" */ ! 375: { 3444,21,2,82,0,0x25,0x00,0xDF,0x0C,"H1722" }, /* 15 1.72MB 3.5" */ ! 376: { 840,10,2,42,1,0x25,0x01,0xDF,0x2E,"h420" }, /* 16 420KB 5.25" */ ! 377: { 1660,10,2,83,0,0x25,0x02,0xDF,0x2E,"H830" }, /* 17 830KB 3.5" */ ! 378: { 2988,18,2,83,0,0x25,0x00,0xDF,0x02,"h1494" }, /* 18 1.49MB 5.25" */ ! 379: { 3486,21,2,83,0,0x25,0x00,0xDF,0x0C,"H1743" }, /* 19 1.74 MB 3.5" */ ! 380: ! 381: { 1760,11,2,80,0,0x1C,0x09,0xCF,0x00,"h880" }, /* 20 880KB 5.25" */ ! 382: { 2080,13,2,80,0,0x1C,0x01,0xCF,0x00,"D1040" }, /* 21 1.04MB 3.5" */ ! 383: { 2240,14,2,80,0,0x1C,0x19,0xCF,0x00,"D1120" }, /* 22 1.12MB 3.5" */ ! 384: { 3200,20,2,80,0,0x1C,0x20,0xCF,0x2C,"h1600" }, /* 23 1.6MB 5.25" */ ! 385: { 3520,22,2,80,0,0x1C,0x08,0xCF,0x2e,"H1760" }, /* 24 1.76MB 3.5" */ ! 386: { 3840,24,2,80,0,0x1C,0x20,0xCF,0x00,"H1920" }, /* 25 1.92MB 3.5" */ ! 387: { 6400,40,2,80,0,0x25,0x5B,0xCF,0x00,"E3200" }, /* 26 3.20MB 3.5" */ ! 388: { 7040,44,2,80,0,0x25,0x5B,0xCF,0x00,"E3520" }, /* 27 3.52MB 3.5" */ ! 389: { 7680,48,2,80,0,0x25,0x63,0xCF,0x00,"E3840" }, /* 28 3.84MB 3.5" */ ! 390: ! 391: { 3680,23,2,80,0,0x1C,0x10,0xCF,0x00,"H1840" }, /* 29 1.84MB 3.5" */ ! 392: { 1600,10,2,80,0,0x25,0x02,0xDF,0x2E,"D800" }, /* 30 800KB 3.5" */ ! 393: { 3200,20,2,80,0,0x1C,0x00,0xCF,0x2C,"H1600" }, /* 31 1.6MB 3.5" */ ! 394: }; ! 395: ! 396: #define NUMBER(x) (sizeof(x) / sizeof(*(x))) ! 397: #define SECTSIZE (_FD_SECTSIZE(*floppy)) ! 398: ! 399: /* Auto-detection: Disk type used until the next media change occurs. */ ! 400: static struct floppy_struct *current_type[N_DRIVE] = { ! 401: NULL, NULL, NULL, NULL, ! 402: NULL, NULL, NULL, NULL ! 403: }; ! 404: ! 405: /* ! 406: * User-provided type information. current_type points to ! 407: * the respective entry of this array. ! 408: */ ! 409: static struct floppy_struct user_params[N_DRIVE]; ! 410: ! 411: static int floppy_sizes[256]; ! 412: static int floppy_blocksizes[256] = { 0, }; ! 413: ! 414: /* ! 415: * The driver is trying to determine the correct media format ! 416: * while probing is set. rw_interrupt() clears it after a ! 417: * successful access. ! 418: */ ! 419: static int probing = 0; ! 420: ! 421: /* Synchronization of FDC access. */ ! 422: #define FD_COMMAND_NONE -1 ! 423: #define FD_COMMAND_ERROR 2 ! 424: #define FD_COMMAND_OKAY 3 ! 425: ! 426: static volatile int command_status = FD_COMMAND_NONE, fdc_busy = 0; ! 427: static struct wait_queue *fdc_wait = NULL, *command_done = NULL; ! 428: #ifdef MACH ! 429: extern int issig (void); ! 430: #define NO_SIGNAL (! issig () || ! interruptible) ! 431: #else ! 432: #define NO_SIGNAL (!(current->signal & ~current->blocked) || !interruptible) ! 433: #endif ! 434: #define CALL(x) if ((x) == -EINTR) return -EINTR ! 435: #define ECALL(x) if ((ret = (x))) return ret; ! 436: #define _WAIT(x,i) CALL(ret=wait_til_done((x),i)) ! 437: #define WAIT(x) _WAIT((x),interruptible) ! 438: #define IWAIT(x) _WAIT((x),1) ! 439: ! 440: /* Errors during formatting are counted here. */ ! 441: static int format_errors; ! 442: ! 443: /* Format request descriptor. */ ! 444: static struct format_descr format_req; ! 445: ! 446: /* ! 447: * Rate is 0 for 500kb/s, 1 for 300kbps, 2 for 250kbps ! 448: * Spec1 is 0xSH, where S is stepping rate (F=1ms, E=2ms, D=3ms etc), ! 449: * H is head unload time (1=16ms, 2=32ms, etc) ! 450: */ ! 451: ! 452: /* ! 453: * Track buffer ! 454: * Because these are written to by the DMA controller, they must ! 455: * not contain a 64k byte boundary crossing, or data will be ! 456: * corrupted/lost. Alignment of these is enforced in boot/head.S. ! 457: * Note that you must not change the sizes below without updating head.S. ! 458: */ ! 459: static char *floppy_track_buffer=0; ! 460: static int max_buffer_sectors=0; ! 461: ! 462: static int *errors; ! 463: typedef void (*done_f)(int); ! 464: static struct cont_t { ! 465: void (*interrupt)(void); /* this is called after the interrupt of the ! 466: * main command */ ! 467: void (*redo)(void); /* this is called to retry the operation */ ! 468: void (*error)(void); /* this is called to tally an error */ ! 469: done_f done; /* this is called to say if the operation has ! 470: * succeeded/failed */ ! 471: } *cont=NULL; ! 472: ! 473: static void floppy_ready(void); ! 474: static void floppy_start(void); ! 475: static void process_fd_request(void); ! 476: static void recalibrate_floppy(void); ! 477: static void floppy_shutdown(void); ! 478: ! 479: static int floppy_grab_irq_and_dma(void); ! 480: static void floppy_release_irq_and_dma(void); ! 481: ! 482: /* ! 483: * The "reset" variable should be tested whenever an interrupt is scheduled, ! 484: * after the commands have been sent. This is to ensure that the driver doesn't ! 485: * get wedged when the interrupt doesn't come because of a failed command. ! 486: * reset doesn't need to be tested before sending commands, because ! 487: * output_byte is automatically disabled when reset is set. ! 488: */ ! 489: #define CHECK_RESET { if (FDCS->reset){ reset_fdc(); return; } } ! 490: static void reset_fdc(void); ! 491: ! 492: /* ! 493: * These are global variables, as that's the easiest way to give ! 494: * information to interrupts. They are the data used for the current ! 495: * request. ! 496: */ ! 497: #define NO_TRACK -1 ! 498: #define NEED_1_RECAL -2 ! 499: #define NEED_2_RECAL -3 ! 500: ! 501: /* */ ! 502: static int usage_count = 0; ! 503: ! 504: ! 505: /* buffer related variables */ ! 506: static int buffer_track = -1; ! 507: static int buffer_drive = -1; ! 508: static int buffer_min = -1; ! 509: static int buffer_max = -1; ! 510: ! 511: /* fdc related variables, should end up in a struct */ ! 512: static struct floppy_fdc_state fdc_state[N_FDC]; ! 513: static int fdc; /* current fdc */ ! 514: ! 515: static struct floppy_struct * floppy = floppy_type; ! 516: static unsigned char current_drive = 0; ! 517: static long current_count_sectors = 0; ! 518: static unsigned char sector_t; /* sector in track */ ! 519: ! 520: #ifdef DEBUGT ! 521: static long unsigned debugtimer; ! 522: #endif ! 523: ! 524: /* ! 525: * Debugging ! 526: * ========= ! 527: */ ! 528: static inline void set_debugt(void) ! 529: { ! 530: #ifdef DEBUGT ! 531: debugtimer = jiffies; ! 532: #endif ! 533: } ! 534: ! 535: static inline void debugt(const char *message) ! 536: { ! 537: #ifdef DEBUGT ! 538: if (DP->flags & DEBUGT) ! 539: printk("%s dtime=%lu\n", message, jiffies-debugtimer); ! 540: #endif ! 541: } ! 542: ! 543: typedef void (*timeout_fn)(unsigned long); ! 544: static struct timer_list fd_timeout ={ NULL, NULL, 0, 0, ! 545: (timeout_fn) floppy_shutdown }; ! 546: ! 547: static const char *timeout_message; ! 548: ! 549: #ifdef FLOPPY_SANITY_CHECK ! 550: static void is_alive(const char *message) ! 551: { ! 552: /* this routine checks whether the floppy driver is "alive" */ ! 553: if (fdc_busy && command_status < 2 && !fd_timeout.prev){ ! 554: DPRINT1("timeout handler died: %s\n",message); ! 555: } ! 556: } ! 557: #endif ! 558: ! 559: #ifdef FLOPPY_SANITY_CHECK ! 560: ! 561: #define OLOGSIZE 20 ! 562: ! 563: static void (*lasthandler)(void) = NULL; ! 564: static int interruptjiffies=0; ! 565: static int resultjiffies=0; ! 566: static int resultsize=0; ! 567: static int lastredo=0; ! 568: ! 569: static struct output_log { ! 570: unsigned char data; ! 571: unsigned char status; ! 572: unsigned long jiffies; ! 573: } output_log[OLOGSIZE]; ! 574: ! 575: static int output_log_pos=0; ! 576: #endif ! 577: ! 578: #define CURRENTD -1 ! 579: #define MAXTIMEOUT -2 ! 580: ! 581: static void reschedule_timeout(int drive, const char *message, int marg) ! 582: { ! 583: if (drive == CURRENTD) ! 584: drive = current_drive; ! 585: del_timer(&fd_timeout); ! 586: if (drive < 0 || drive > N_DRIVE) { ! 587: fd_timeout.expires = jiffies + 20*HZ; ! 588: drive=0; ! 589: } else ! 590: fd_timeout.expires = jiffies + UDP->timeout; ! 591: add_timer(&fd_timeout); ! 592: if (UDP->flags & FD_DEBUG){ ! 593: DPRINT("reschedule timeout "); ! 594: printk(message, marg); ! 595: printk("\n"); ! 596: } ! 597: timeout_message = message; ! 598: } ! 599: ! 600: static int maximum(int a, int b) ! 601: { ! 602: if(a > b) ! 603: return a; ! 604: else ! 605: return b; ! 606: } ! 607: #define INFBOUND(a,b) (a)=maximum((a),(b)); ! 608: ! 609: static int minimum(int a, int b) ! 610: { ! 611: if(a < b) ! 612: return a; ! 613: else ! 614: return b; ! 615: } ! 616: #define SUPBOUND(a,b) (a)=minimum((a),(b)); ! 617: ! 618: ! 619: /* ! 620: * Bottom half floppy driver. ! 621: * ========================== ! 622: * ! 623: * This part of the file contains the code talking directly to the hardware, ! 624: * and also the main service loop (seek-configure-spinup-command) ! 625: */ ! 626: ! 627: /* ! 628: * disk change. ! 629: * This routine is responsible for maintaining the FD_DISK_CHANGE flag, ! 630: * and the last_checked date. ! 631: * ! 632: * last_checked is the date of the last check which showed 'no disk change' ! 633: * FD_DISK_CHANGE is set under two conditions: ! 634: * 1. The floppy has been changed after some i/o to that floppy already ! 635: * took place. ! 636: * 2. No floppy disk is in the drive. This is done in order to ensure that ! 637: * requests are quickly flushed in case there is no disk in the drive. It ! 638: * follows that FD_DISK_CHANGE can only be cleared if there is a disk in ! 639: * the drive. ! 640: * ! 641: * For 1., maxblock is observed. Maxblock is 0 if no i/o has taken place yet. ! 642: * For 2., FD_DISK_NEWCHANGE is watched. FD_DISK_NEWCHANGE is cleared on ! 643: * each seek. If a disk is present, the disk change line should also be ! 644: * cleared on each seek. Thus, if FD_DISK_NEWCHANGE is clear, but the disk ! 645: * change line is set, this means either that no disk is in the drive, or ! 646: * that it has been removed since the last seek. ! 647: * ! 648: * This means that we really have a third possibility too: ! 649: * The floppy has been changed after the last seek. ! 650: */ ! 651: ! 652: static int disk_change(int drive) ! 653: { ! 654: int fdc=FDC(drive); ! 655: #ifdef FLOPPY_SANITY_CHECK ! 656: if (jiffies < UDP->select_delay + UDRS->select_date) ! 657: DPRINT("WARNING disk change called early\n"); ! 658: if (!(FDCS->dor & (0x10 << UNIT(drive))) || ! 659: (FDCS->dor & 3) != UNIT(drive) || ! 660: fdc != FDC(drive)){ ! 661: DPRINT("probing disk change on unselected drive\n"); ! 662: DPRINT3("drive=%d fdc=%d dor=%x\n",drive, FDC(drive), ! 663: FDCS->dor); ! 664: } ! 665: #endif ! 666: ! 667: #ifdef DCL_DEBUG ! 668: if (UDP->flags & FD_DEBUG){ ! 669: DPRINT1("checking disk change line for drive %d\n",drive); ! 670: DPRINT1("jiffies=%ld\n", jiffies); ! 671: DPRINT1("disk change line=%x\n",fd_inb(FD_DIR)&0x80); ! 672: DPRINT1("flags=%x\n",UDRS->flags); ! 673: } ! 674: #endif ! 675: if (UDP->flags & FD_BROKEN_DCL) ! 676: return UTESTF(FD_DISK_CHANGED); ! 677: if ((fd_inb(FD_DIR) ^ UDP->flags) & 0x80){ ! 678: USETF(FD_VERIFY); /* verify write protection */ ! 679: if (UDRS->maxblock){ ! 680: /* mark it changed */ ! 681: USETF(FD_DISK_CHANGED); ! 682: ! 683: /* invalidate its geometry */ ! 684: if (UDRS->keep_data >= 0) { ! 685: if ((UDP->flags & FTD_MSG) && ! 686: current_type[drive] != NULL) ! 687: DPRINT("Disk type is undefined after " ! 688: "disk change\n"); ! 689: current_type[drive] = NULL; ! 690: floppy_sizes[TOMINOR(current_drive)] = MAX_DISK_SIZE; ! 691: } ! 692: } ! 693: /*USETF(FD_DISK_NEWCHANGE);*/ ! 694: return 1; ! 695: } else { ! 696: UDRS->last_checked=jiffies; ! 697: UCLEARF(FD_DISK_NEWCHANGE); ! 698: } ! 699: return 0; ! 700: } ! 701: ! 702: static inline int is_selected(int dor, int unit) ! 703: { ! 704: return ((dor & (0x10 << unit)) && (dor &3) == unit); ! 705: } ! 706: ! 707: static int set_dor(int fdc, char mask, char data) ! 708: { ! 709: register unsigned char drive, unit, newdor,olddor; ! 710: ! 711: if (FDCS->address == -1) ! 712: return -1; ! 713: ! 714: olddor = FDCS->dor; ! 715: newdor = (olddor & mask) | data; ! 716: if (newdor != olddor){ ! 717: unit = olddor & 0x3; ! 718: if (is_selected(olddor, unit) && !is_selected(newdor,unit)){ ! 719: drive = REVDRIVE(fdc,unit); ! 720: #ifdef DCL_DEBUG ! 721: if (UDP->flags & FD_DEBUG){ ! 722: DPRINT("calling disk change from set_dor\n"); ! 723: } ! 724: #endif ! 725: disk_change(drive); ! 726: } ! 727: FDCS->dor = newdor; ! 728: fd_outb(newdor, FD_DOR); ! 729: ! 730: unit = newdor & 0x3; ! 731: if (!is_selected(olddor, unit) && is_selected(newdor,unit)){ ! 732: drive = REVDRIVE(fdc,unit); ! 733: UDRS->select_date = jiffies; ! 734: } ! 735: } ! 736: if (newdor & 0xf0) ! 737: floppy_grab_irq_and_dma(); ! 738: if (olddor & 0xf0) ! 739: floppy_release_irq_and_dma(); ! 740: return olddor; ! 741: } ! 742: ! 743: static void twaddle(void) ! 744: { ! 745: if (DP->select_delay) ! 746: return; ! 747: fd_outb(FDCS->dor & ~(0x10<<UNIT(current_drive)),FD_DOR); ! 748: fd_outb(FDCS->dor, FD_DOR); ! 749: DRS->select_date = jiffies; ! 750: } ! 751: ! 752: /* reset all driver information about the current fdc. This is needed after ! 753: * a reset, and after a raw command. */ ! 754: static void reset_fdc_info(int mode) ! 755: { ! 756: int drive; ! 757: ! 758: FDCS->spec1 = FDCS->spec2 = -1; ! 759: FDCS->need_configure = 1; ! 760: FDCS->perp_mode = 1; ! 761: FDCS->rawcmd = 0; ! 762: for (drive = 0; drive < N_DRIVE; drive++) ! 763: if (FDC(drive) == fdc && ! 764: (mode || UDRS->track != NEED_1_RECAL)) ! 765: UDRS->track = NEED_2_RECAL; ! 766: } ! 767: ! 768: /* selects the fdc and drive, and enables the fdc's input/dma. */ ! 769: static void set_fdc(int drive) ! 770: { ! 771: if (drive >= 0 && drive < N_DRIVE){ ! 772: fdc = FDC(drive); ! 773: current_drive = drive; ! 774: } ! 775: if (fdc != 1 && fdc != 0) { ! 776: printk("bad fdc value\n"); ! 777: return; ! 778: } ! 779: set_dor(fdc,~0,8); ! 780: set_dor(1-fdc, ~8, 0); ! 781: if (FDCS->rawcmd == 2) ! 782: reset_fdc_info(1); ! 783: if (fd_inb(FD_STATUS) != STATUS_READY) ! 784: FDCS->reset = 1; ! 785: } ! 786: ! 787: /* locks the driver */ ! 788: static int lock_fdc(int drive, int interruptible) ! 789: { ! 790: if (!usage_count){ ! 791: printk("trying to lock fdc while usage count=0\n"); ! 792: return -1; ! 793: } ! 794: floppy_grab_irq_and_dma(); ! 795: cli(); ! 796: while (fdc_busy && NO_SIGNAL) ! 797: interruptible_sleep_on(&fdc_wait); ! 798: if (fdc_busy){ ! 799: sti(); ! 800: return -EINTR; ! 801: } ! 802: fdc_busy = 1; ! 803: sti(); ! 804: command_status = FD_COMMAND_NONE; ! 805: reschedule_timeout(drive, "lock fdc", 0); ! 806: set_fdc(drive); ! 807: return 0; ! 808: } ! 809: ! 810: #define LOCK_FDC(drive,interruptible) \ ! 811: if (lock_fdc(drive,interruptible)) return -EINTR; ! 812: ! 813: ! 814: /* unlocks the driver */ ! 815: static inline void unlock_fdc(void) ! 816: { ! 817: raw_cmd = 0; ! 818: if (!fdc_busy) ! 819: DPRINT("FDC access conflict!\n"); ! 820: ! 821: if (DEVICE_INTR) ! 822: DPRINT1("device interrupt still active at FDC release: %p!\n", ! 823: DEVICE_INTR); ! 824: command_status = FD_COMMAND_NONE; ! 825: del_timer(&fd_timeout); ! 826: cont = NULL; ! 827: fdc_busy = 0; ! 828: floppy_release_irq_and_dma(); ! 829: wake_up(&fdc_wait); ! 830: } ! 831: ! 832: /* switches the motor off after a given timeout */ ! 833: static void motor_off_callback(unsigned long nr) ! 834: { ! 835: unsigned char mask = ~(0x10 << UNIT(nr)); ! 836: ! 837: set_dor(FDC(nr), mask, 0); ! 838: } ! 839: ! 840: static struct timer_list motor_off_timer[N_DRIVE] = { ! 841: { NULL, NULL, 0, 0, motor_off_callback }, ! 842: { NULL, NULL, 0, 1, motor_off_callback }, ! 843: { NULL, NULL, 0, 2, motor_off_callback }, ! 844: { NULL, NULL, 0, 3, motor_off_callback }, ! 845: { NULL, NULL, 0, 4, motor_off_callback }, ! 846: { NULL, NULL, 0, 5, motor_off_callback }, ! 847: { NULL, NULL, 0, 6, motor_off_callback }, ! 848: { NULL, NULL, 0, 7, motor_off_callback } ! 849: }; ! 850: ! 851: /* schedules motor off */ ! 852: static void floppy_off(unsigned int drive) ! 853: { ! 854: unsigned long volatile delta; ! 855: register int fdc=FDC(drive); ! 856: ! 857: if (!(FDCS->dor & (0x10 << UNIT(drive)))) ! 858: return; ! 859: ! 860: del_timer(motor_off_timer+drive); ! 861: ! 862: /* make spindle stop in a position which minimizes spinup time ! 863: * next time */ ! 864: if (UDP->rps){ ! 865: delta = jiffies - UDRS->first_read_date + HZ - ! 866: UDP->spindown_offset; ! 867: delta = ((delta * UDP->rps) % HZ) / UDP->rps; ! 868: motor_off_timer[drive].expires = jiffies + UDP->spindown - delta; ! 869: } ! 870: add_timer(motor_off_timer+drive); ! 871: } ! 872: ! 873: /* ! 874: * cycle through all N_DRIVE floppy drives, for disk change testing. ! 875: * stopping at current drive. This is done before any long operation, to ! 876: * be sure to have up to date disk change information. ! 877: */ ! 878: static void scandrives(void) ! 879: { ! 880: int i, drive, saved_drive; ! 881: ! 882: if (DP->select_delay) ! 883: return; ! 884: ! 885: saved_drive = current_drive; ! 886: for (i=0; i < N_DRIVE; i++){ ! 887: drive = (saved_drive + i + 1) % N_DRIVE; ! 888: if (UDRS->fd_ref == 0 || UDP->select_delay != 0) ! 889: continue; /* skip closed drives */ ! 890: set_fdc(drive); ! 891: if (!(set_dor(fdc, ~3, UNIT(drive) | (0x10 << UNIT(drive))) & ! 892: (0x10 << UNIT(drive)))) ! 893: /* switch the motor off again, if it was off to ! 894: * begin with */ ! 895: set_dor(fdc, ~(0x10 << UNIT(drive)), 0); ! 896: } ! 897: set_fdc(saved_drive); ! 898: } ! 899: ! 900: static struct timer_list fd_timer ={ NULL, NULL, 0, 0, 0 }; ! 901: ! 902: /* this function makes sure that the disk stays in the drive during the ! 903: * transfer */ ! 904: static void fd_watchdog(void) ! 905: { ! 906: #ifdef DCL_DEBUG ! 907: if (DP->flags & FD_DEBUG){ ! 908: DPRINT("calling disk change from watchdog\n"); ! 909: } ! 910: #endif ! 911: ! 912: if (disk_change(current_drive)){ ! 913: DPRINT("disk removed during i/o\n"); ! 914: floppy_shutdown(); ! 915: } else { ! 916: del_timer(&fd_timer); ! 917: fd_timer.function = (timeout_fn) fd_watchdog; ! 918: fd_timer.expires = jiffies + HZ / 10; ! 919: add_timer(&fd_timer); ! 920: } ! 921: } ! 922: ! 923: static void main_command_interrupt(void) ! 924: { ! 925: del_timer(&fd_timer); ! 926: cont->interrupt(); ! 927: } ! 928: ! 929: /* waits for a delay (spinup or select) to pass */ ! 930: static int wait_for_completion(int delay, timeout_fn function) ! 931: { ! 932: if (FDCS->reset){ ! 933: reset_fdc(); /* do the reset during sleep to win time ! 934: * if we don't need to sleep, it's a good ! 935: * occasion anyways */ ! 936: return 1; ! 937: } ! 938: ! 939: if (jiffies < delay){ ! 940: del_timer(&fd_timer); ! 941: fd_timer.function = function; ! 942: fd_timer.expires = delay; ! 943: add_timer(&fd_timer); ! 944: return 1; ! 945: } ! 946: return 0; ! 947: } ! 948: ! 949: static int hlt_disabled=0; ! 950: static void floppy_disable_hlt(void) ! 951: { ! 952: unsigned long flags; ! 953: save_flags(flags); ! 954: cli(); ! 955: if (!hlt_disabled){ ! 956: hlt_disabled=1; ! 957: #ifdef HAVE_DISABLE_HLT ! 958: disable_hlt(); ! 959: #endif ! 960: } ! 961: restore_flags(flags); ! 962: } ! 963: ! 964: static void floppy_enable_hlt(void) ! 965: { ! 966: unsigned long flags; ! 967: save_flags(flags); ! 968: cli(); ! 969: if (hlt_disabled){ ! 970: hlt_disabled=0; ! 971: #ifdef HAVE_DISABLE_HLT ! 972: enable_hlt(); ! 973: #endif ! 974: } ! 975: restore_flags(flags); ! 976: } ! 977: ! 978: ! 979: static void setup_DMA(void) ! 980: { ! 981: #ifdef FLOPPY_SANITY_CHECK ! 982: if (raw_cmd->length == 0){ ! 983: int i; ! 984: ! 985: printk("zero dma transfer size:"); ! 986: for (i=0; i < raw_cmd->cmd_count; i++) ! 987: printk("%x,", raw_cmd->cmd[i]); ! 988: printk("\n"); ! 989: cont->done(0); ! 990: FDCS->reset = 1; ! 991: return; ! 992: } ! 993: if ((long) raw_cmd->kernel_data % 512){ ! 994: printk("non aligned address: %p\n", raw_cmd->kernel_data); ! 995: cont->done(0); ! 996: FDCS->reset=1; ! 997: return; ! 998: } ! 999: if (CROSS_64KB(raw_cmd->kernel_data, raw_cmd->length)) { ! 1000: printk("DMA crossing 64-K boundary %p-%p\n", ! 1001: raw_cmd->kernel_data, ! 1002: raw_cmd->kernel_data + raw_cmd->length); ! 1003: cont->done(0); ! 1004: FDCS->reset=1; ! 1005: return; ! 1006: } ! 1007: #endif ! 1008: cli(); ! 1009: fd_disable_dma(); ! 1010: fd_clear_dma_ff(); ! 1011: fd_set_dma_mode((raw_cmd->flags & FD_RAW_READ)? ! 1012: DMA_MODE_READ : DMA_MODE_WRITE); ! 1013: fd_set_dma_addr(virt_to_bus(raw_cmd->kernel_data)); ! 1014: fd_set_dma_count(raw_cmd->length); ! 1015: fd_enable_dma(); ! 1016: sti(); ! 1017: floppy_disable_hlt(); ! 1018: } ! 1019: ! 1020: /* sends a command byte to the fdc */ ! 1021: static int output_byte(char byte) ! 1022: { ! 1023: int counter; ! 1024: unsigned char status = 0; ! 1025: unsigned char rstatus; ! 1026: ! 1027: if (FDCS->reset) ! 1028: return -1; ! 1029: for (counter = 0; counter < 10000 && !FDCS->reset; counter++) { ! 1030: rstatus = fd_inb(FD_STATUS); ! 1031: status = rstatus &(STATUS_READY|STATUS_DIR|STATUS_DMA); ! 1032: if (!(status & STATUS_READY)) ! 1033: continue; ! 1034: if (status == STATUS_READY){ ! 1035: fd_outb(byte,FD_DATA); ! 1036: ! 1037: #ifdef FLOPPY_SANITY_CHECK ! 1038: output_log[output_log_pos].data = byte; ! 1039: output_log[output_log_pos].status = rstatus; ! 1040: output_log[output_log_pos].jiffies = jiffies; ! 1041: output_log_pos = (output_log_pos + 1) % OLOGSIZE; ! 1042: #endif ! 1043: return 0; ! 1044: } else ! 1045: break; ! 1046: } ! 1047: FDCS->reset = 1; ! 1048: if (!initialising) ! 1049: DPRINT2("Unable to send byte %x to FDC. Status=%x\n", ! 1050: byte, status); ! 1051: return -1; ! 1052: } ! 1053: #define LAST_OUT(x) if (output_byte(x)){ reset_fdc();return;} ! 1054: ! 1055: /* gets the response from the fdc */ ! 1056: static int result(void) ! 1057: { ! 1058: int i = 0, counter, status = 0; ! 1059: ! 1060: if (FDCS->reset) ! 1061: return -1; ! 1062: for (counter = 0; counter < 10000 && !FDCS->reset; counter++) { ! 1063: status = fd_inb(FD_STATUS)& ! 1064: (STATUS_DIR|STATUS_READY|STATUS_BUSY|STATUS_DMA); ! 1065: if (!(status & STATUS_READY)) ! 1066: continue; ! 1067: if (status == STATUS_READY){ ! 1068: #ifdef FLOPPY_SANITY_CHECK ! 1069: resultjiffies = jiffies; ! 1070: resultsize = i; ! 1071: #endif ! 1072: return i; ! 1073: } ! 1074: if (status & STATUS_DMA) ! 1075: break; ! 1076: if (status == (STATUS_DIR|STATUS_READY|STATUS_BUSY)) { ! 1077: if (i >= MAX_REPLIES) { ! 1078: DPRINT("floppy_stat reply overrun\n"); ! 1079: break; ! 1080: } ! 1081: reply_buffer[i++] = fd_inb(FD_DATA); ! 1082: } ! 1083: } ! 1084: FDCS->reset = 1; ! 1085: if (!initialising) ! 1086: DPRINT3("Getstatus times out (%x) on fdc %d [%d]\n", ! 1087: status, fdc, i); ! 1088: return -1; ! 1089: } ! 1090: ! 1091: /* Set perpendicular mode as required, based on data rate, if supported. ! 1092: * 82077 Now tested. 1Mbps data rate only possible with 82077-1. ! 1093: */ ! 1094: static inline void perpendicular_mode(void) ! 1095: { ! 1096: unsigned char perp_mode; ! 1097: ! 1098: if (raw_cmd->rate & 0x40){ ! 1099: switch(raw_cmd->rate & 3){ ! 1100: case 0: ! 1101: perp_mode=2; ! 1102: break; ! 1103: case 3: ! 1104: perp_mode=3; ! 1105: break; ! 1106: default: ! 1107: DPRINT("Invalid data rate for perpendicular mode!\n"); ! 1108: cont->done(0); ! 1109: FDCS->reset = 1; /* convenient way to return to ! 1110: * redo without to much hassle (deep ! 1111: * stack et al. */ ! 1112: return; ! 1113: } ! 1114: } else ! 1115: perp_mode = 0; ! 1116: ! 1117: if (FDCS->perp_mode == perp_mode) ! 1118: return; ! 1119: if (FDCS->version >= FDC_82077_ORIG && FDCS->has_fifo) { ! 1120: output_byte(FD_PERPENDICULAR); ! 1121: output_byte(perp_mode); ! 1122: FDCS->perp_mode = perp_mode; ! 1123: } else if (perp_mode) { ! 1124: DPRINT("perpendicular mode not supported by this FDC.\n"); ! 1125: } ! 1126: } /* perpendicular_mode */ ! 1127: ! 1128: #define NOMINAL_DTR 500 ! 1129: ! 1130: /* Issue a "SPECIFY" command to set the step rate time, head unload time, ! 1131: * head load time, and DMA disable flag to values needed by floppy. ! 1132: * ! 1133: * The value "dtr" is the data transfer rate in Kbps. It is needed ! 1134: * to account for the data rate-based scaling done by the 82072 and 82077 ! 1135: * FDC types. This parameter is ignored for other types of FDCs (i.e. ! 1136: * 8272a). ! 1137: * ! 1138: * Note that changing the data transfer rate has a (probably deleterious) ! 1139: * effect on the parameters subject to scaling for 82072/82077 FDCs, so ! 1140: * fdc_specify is called again after each data transfer rate ! 1141: * change. ! 1142: * ! 1143: * srt: 1000 to 16000 in microseconds ! 1144: * hut: 16 to 240 milliseconds ! 1145: * hlt: 2 to 254 milliseconds ! 1146: * ! 1147: * These values are rounded up to the next highest available delay time. ! 1148: */ ! 1149: static void fdc_specify(void) ! 1150: { ! 1151: unsigned char spec1, spec2; ! 1152: int srt, hlt, hut; ! 1153: unsigned long dtr = NOMINAL_DTR; ! 1154: unsigned long scale_dtr = NOMINAL_DTR; ! 1155: int hlt_max_code = 0x7f; ! 1156: int hut_max_code = 0xf; ! 1157: ! 1158: if (FDCS->need_configure && FDCS->has_fifo) { ! 1159: if (FDCS->reset) ! 1160: return; ! 1161: /* Turn on FIFO for 82077-class FDC (improves performance) */ ! 1162: /* TODO: lock this in via LOCK during initialization */ ! 1163: output_byte(FD_CONFIGURE); ! 1164: output_byte(0); ! 1165: output_byte(0x2A); /* FIFO on, polling off, 10 byte threshold */ ! 1166: output_byte(0); /* precompensation from track 0 upwards */ ! 1167: if (FDCS->reset){ ! 1168: FDCS->has_fifo=0; ! 1169: return; ! 1170: } ! 1171: FDCS->need_configure = 0; ! 1172: /*DPRINT("FIFO enabled\n");*/ ! 1173: } ! 1174: ! 1175: switch (raw_cmd->rate & 0x03) { ! 1176: case 3: ! 1177: dtr = 1000; ! 1178: break; ! 1179: case 1: ! 1180: dtr = 300; ! 1181: break; ! 1182: case 2: ! 1183: dtr = 250; ! 1184: break; ! 1185: } ! 1186: ! 1187: if (FDCS->version >= FDC_82072) { ! 1188: scale_dtr = dtr; ! 1189: hlt_max_code = 0x00; /* 0==256msec*dtr0/dtr (not linear!) */ ! 1190: hut_max_code = 0x0; /* 0==256msec*dtr0/dtr (not linear!) */ ! 1191: } ! 1192: ! 1193: /* Convert step rate from microseconds to milliseconds and 4 bits */ ! 1194: srt = 16 - (DP->srt*scale_dtr/1000 + NOMINAL_DTR - 1)/NOMINAL_DTR; ! 1195: SUPBOUND(srt, 0xf); ! 1196: INFBOUND(srt, 0); ! 1197: ! 1198: hlt = (DP->hlt*scale_dtr/2 + NOMINAL_DTR - 1)/NOMINAL_DTR; ! 1199: if (hlt < 0x01) ! 1200: hlt = 0x01; ! 1201: else if (hlt > 0x7f) ! 1202: hlt = hlt_max_code; ! 1203: ! 1204: hut = (DP->hut*scale_dtr/16 + NOMINAL_DTR - 1)/NOMINAL_DTR; ! 1205: if (hut < 0x1) ! 1206: hut = 0x1; ! 1207: else if (hut > 0xf) ! 1208: hut = hut_max_code; ! 1209: ! 1210: spec1 = (srt << 4) | hut; ! 1211: spec2 = (hlt << 1); ! 1212: ! 1213: /* If these parameters did not change, just return with success */ ! 1214: if (FDCS->spec1 != spec1 || FDCS->spec2 != spec2) { ! 1215: /* Go ahead and set spec1 and spec2 */ ! 1216: output_byte(FD_SPECIFY); ! 1217: output_byte(FDCS->spec1 = spec1); ! 1218: output_byte(FDCS->spec2 = spec2); ! 1219: } ! 1220: } /* fdc_specify */ ! 1221: ! 1222: /* Set the FDC's data transfer rate on behalf of the specified drive. ! 1223: * NOTE: with 82072/82077 FDCs, changing the data rate requires a reissue ! 1224: * of the specify command (i.e. using the fdc_specify function). ! 1225: */ ! 1226: static int fdc_dtr(void) ! 1227: { ! 1228: /* If data rate not already set to desired value, set it. */ ! 1229: if ((raw_cmd->rate & 3) == FDCS->dtr) ! 1230: return 0; ! 1231: ! 1232: /* Set dtr */ ! 1233: fd_outb(raw_cmd->rate & 3, FD_DCR); ! 1234: ! 1235: /* TODO: some FDC/drive combinations (C&T 82C711 with TEAC 1.2MB) ! 1236: * need a stabilization period of several milliseconds to be ! 1237: * enforced after data rate changes before R/W operations. ! 1238: * Pause 5 msec to avoid trouble. (Needs to be 2 jiffies) ! 1239: */ ! 1240: FDCS->dtr = raw_cmd->rate & 3; ! 1241: return(wait_for_completion(jiffies+2*HZ/100, ! 1242: (timeout_fn) floppy_ready)); ! 1243: } /* fdc_dtr */ ! 1244: ! 1245: static void tell_sector(void) ! 1246: { ! 1247: printk(": track %d, head %d, sector %d, size %d", ! 1248: R_TRACK, R_HEAD, R_SECTOR, R_SIZECODE); ! 1249: } /* tell_sector */ ! 1250: ! 1251: ! 1252: /* ! 1253: * Ok, this error interpreting routine is called after a ! 1254: * DMA read/write has succeeded ! 1255: * or failed, so we check the results, and copy any buffers. ! 1256: * hhb: Added better error reporting. ! 1257: * ak: Made this into a separate routine. ! 1258: */ ! 1259: static int interpret_errors(void) ! 1260: { ! 1261: char bad; ! 1262: ! 1263: if (inr!=7) { ! 1264: DPRINT("-- FDC reply error"); ! 1265: FDCS->reset = 1; ! 1266: return 1; ! 1267: } ! 1268: ! 1269: /* check IC to find cause of interrupt */ ! 1270: switch (ST0 & ST0_INTR) { ! 1271: case 0x40: /* error occurred during command execution */ ! 1272: bad = 1; ! 1273: if (ST1 & ST1_WP) { ! 1274: DPRINT("Drive is write protected\n"); ! 1275: CLEARF(FD_DISK_WRITABLE); ! 1276: cont->done(0); ! 1277: bad = 2; ! 1278: } else if (ST1 & ST1_ND) { ! 1279: SETF(FD_NEED_TWADDLE); ! 1280: } else if (ST1 & ST1_OR) { ! 1281: if (DP->flags & FTD_MSG) ! 1282: DPRINT("Over/Underrun - retrying\n"); ! 1283: bad = 0; ! 1284: }else if (*errors >= DP->max_errors.reporting){ ! 1285: DPRINT(""); ! 1286: if (ST0 & ST0_ECE) { ! 1287: printk("Recalibrate failed!"); ! 1288: } else if (ST2 & ST2_CRC) { ! 1289: printk("data CRC error"); ! 1290: tell_sector(); ! 1291: } else if (ST1 & ST1_CRC) { ! 1292: printk("CRC error"); ! 1293: tell_sector(); ! 1294: } else if ((ST1 & (ST1_MAM|ST1_ND)) || (ST2 & ST2_MAM)) { ! 1295: if (!probing) { ! 1296: printk("sector not found"); ! 1297: tell_sector(); ! 1298: } else ! 1299: printk("probe failed..."); ! 1300: } else if (ST2 & ST2_WC) { /* seek error */ ! 1301: printk("wrong cylinder"); ! 1302: } else if (ST2 & ST2_BC) { /* cylinder marked as bad */ ! 1303: printk("bad cylinder"); ! 1304: } else { ! 1305: printk("unknown error. ST[0..2] are: 0x%x 0x%x 0x%x", ST0, ST1, ST2); ! 1306: tell_sector(); ! 1307: } ! 1308: printk("\n"); ! 1309: ! 1310: } ! 1311: if (ST2 & ST2_WC || ST2 & ST2_BC) ! 1312: /* wrong cylinder => recal */ ! 1313: DRS->track = NEED_2_RECAL; ! 1314: return bad; ! 1315: case 0x80: /* invalid command given */ ! 1316: DPRINT("Invalid FDC command given!\n"); ! 1317: cont->done(0); ! 1318: return 2; ! 1319: case 0xc0: ! 1320: DPRINT("Abnormal termination caused by polling\n"); ! 1321: cont->error(); ! 1322: return 2; ! 1323: default: /* (0) Normal command termination */ ! 1324: return 0; ! 1325: } ! 1326: } ! 1327: ! 1328: /* ! 1329: * This routine is called when everything should be correctly set up ! 1330: * for the transfer (ie floppy motor is on, the correct floppy is ! 1331: * selected, and the head is sitting on the right track). ! 1332: */ ! 1333: static void setup_rw_floppy(void) ! 1334: { ! 1335: int i,ready_date,r, flags,dflags; ! 1336: timeout_fn function; ! 1337: ! 1338: flags = raw_cmd->flags; ! 1339: if (flags & (FD_RAW_READ | FD_RAW_WRITE)) ! 1340: flags |= FD_RAW_INTR; ! 1341: ! 1342: if ((flags & FD_RAW_SPIN) && !(flags & FD_RAW_NO_MOTOR)){ ! 1343: ready_date = DRS->spinup_date + DP->spinup; ! 1344: /* If spinup will take a long time, rerun scandrives ! 1345: * again just before spinup completion. Beware that ! 1346: * after scandrives, we must again wait for selection. ! 1347: */ ! 1348: if (ready_date > jiffies + DP->select_delay){ ! 1349: ready_date -= DP->select_delay; ! 1350: function = (timeout_fn) floppy_start; ! 1351: } else ! 1352: function = (timeout_fn) setup_rw_floppy; ! 1353: ! 1354: /* wait until the floppy is spinning fast enough */ ! 1355: if (wait_for_completion(ready_date,function)) ! 1356: return; ! 1357: } ! 1358: dflags = DRS->flags; ! 1359: ! 1360: if ((flags & FD_RAW_READ) || (flags & FD_RAW_WRITE)) ! 1361: setup_DMA(); ! 1362: ! 1363: if (flags & FD_RAW_INTR) ! 1364: SET_INTR(main_command_interrupt); ! 1365: ! 1366: r=0; ! 1367: for (i=0; i< raw_cmd->cmd_count; i++) ! 1368: r|=output_byte(raw_cmd->cmd[i]); ! 1369: ! 1370: #ifdef DEBUGT ! 1371: debugt("rw_command: "); ! 1372: #endif ! 1373: if (r){ ! 1374: reset_fdc(); ! 1375: return; ! 1376: } ! 1377: ! 1378: if (!(flags & FD_RAW_INTR)){ ! 1379: inr = result(); ! 1380: cont->interrupt(); ! 1381: } else if (flags & FD_RAW_NEED_DISK) ! 1382: fd_watchdog(); ! 1383: } ! 1384: ! 1385: static int blind_seek; ! 1386: ! 1387: /* ! 1388: * This is the routine called after every seek (or recalibrate) interrupt ! 1389: * from the floppy controller. ! 1390: */ ! 1391: static void seek_interrupt(void) ! 1392: { ! 1393: #ifdef DEBUGT ! 1394: debugt("seek interrupt:"); ! 1395: #endif ! 1396: if (inr != 2 || (ST0 & 0xF8) != 0x20) { ! 1397: DPRINT("seek failed\n"); ! 1398: DRS->track = NEED_2_RECAL; ! 1399: cont->error(); ! 1400: cont->redo(); ! 1401: return; ! 1402: } ! 1403: if (DRS->track >= 0 && DRS->track != ST1 && !blind_seek){ ! 1404: #ifdef DCL_DEBUG ! 1405: if (DP->flags & FD_DEBUG){ ! 1406: DPRINT("clearing NEWCHANGE flag because of effective seek\n"); ! 1407: DPRINT1("jiffies=%ld\n", jiffies); ! 1408: } ! 1409: #endif ! 1410: CLEARF(FD_DISK_NEWCHANGE); /* effective seek */ ! 1411: DRS->select_date = jiffies; ! 1412: } ! 1413: DRS->track = ST1; ! 1414: floppy_ready(); ! 1415: } ! 1416: ! 1417: static void check_wp(void) ! 1418: { ! 1419: if (TESTF(FD_VERIFY)) { ! 1420: /* check write protection */ ! 1421: output_byte(FD_GETSTATUS); ! 1422: output_byte(UNIT(current_drive)); ! 1423: if (result() != 1){ ! 1424: FDCS->reset = 1; ! 1425: return; ! 1426: } ! 1427: CLEARF(FD_VERIFY); ! 1428: CLEARF(FD_NEED_TWADDLE); ! 1429: #ifdef DCL_DEBUG ! 1430: if (DP->flags & FD_DEBUG){ ! 1431: DPRINT("checking whether disk is write protected\n"); ! 1432: DPRINT1("wp=%x\n",ST3 & 0x40); ! 1433: } ! 1434: #endif ! 1435: if (!(ST3 & 0x40)) ! 1436: SETF(FD_DISK_WRITABLE); ! 1437: else ! 1438: CLEARF(FD_DISK_WRITABLE); ! 1439: } ! 1440: } ! 1441: ! 1442: static void seek_floppy(void) ! 1443: { ! 1444: int track; ! 1445: ! 1446: blind_seek=0; ! 1447: ! 1448: #ifdef DCL_DEBUG ! 1449: if (DP->flags & FD_DEBUG){ ! 1450: DPRINT("calling disk change from seek\n"); ! 1451: } ! 1452: #endif ! 1453: ! 1454: if (!TESTF(FD_DISK_NEWCHANGE) && ! 1455: disk_change(current_drive) && ! 1456: (raw_cmd->flags & FD_RAW_NEED_DISK)){ ! 1457: /* the media changed flag should be cleared after the seek. ! 1458: * If it isn't, this means that there is really no disk in ! 1459: * the drive. ! 1460: */ ! 1461: SETF(FD_DISK_CHANGED); ! 1462: cont->done(0); ! 1463: cont->redo(); ! 1464: return; ! 1465: } ! 1466: if (DRS->track <= NEED_1_RECAL){ ! 1467: recalibrate_floppy(); ! 1468: return; ! 1469: } else if (TESTF(FD_DISK_NEWCHANGE) && ! 1470: (raw_cmd->flags & FD_RAW_NEED_DISK) && ! 1471: (DRS->track <= NO_TRACK || DRS->track == raw_cmd->track)) { ! 1472: /* we seek to clear the media-changed condition. Does anybody ! 1473: * know a more elegant way, which works on all drives? */ ! 1474: if (raw_cmd->track) ! 1475: track = raw_cmd->track - 1; ! 1476: else { ! 1477: if (DP->flags & FD_SILENT_DCL_CLEAR){ ! 1478: set_dor(fdc, ~(0x10 << UNIT(current_drive)), 0); ! 1479: blind_seek = 1; ! 1480: raw_cmd->flags |= FD_RAW_NEED_SEEK; ! 1481: } ! 1482: track = 1; ! 1483: } ! 1484: } else { ! 1485: check_wp(); ! 1486: if (raw_cmd->track != DRS->track && ! 1487: (raw_cmd->flags & FD_RAW_NEED_SEEK)) ! 1488: track = raw_cmd->track; ! 1489: else { ! 1490: setup_rw_floppy(); ! 1491: return; ! 1492: } ! 1493: } ! 1494: ! 1495: SET_INTR(seek_interrupt); ! 1496: output_byte(FD_SEEK); ! 1497: output_byte(UNIT(current_drive)); ! 1498: LAST_OUT(track); ! 1499: #ifdef DEBUGT ! 1500: debugt("seek command:"); ! 1501: #endif ! 1502: } ! 1503: ! 1504: static void recal_interrupt(void) ! 1505: { ! 1506: #ifdef DEBUGT ! 1507: debugt("recal interrupt:"); ! 1508: #endif ! 1509: if (inr !=2) ! 1510: FDCS->reset = 1; ! 1511: else if (ST0 & ST0_ECE) { ! 1512: switch(DRS->track){ ! 1513: case NEED_1_RECAL: ! 1514: #ifdef DEBUGT ! 1515: debugt("recal interrupt need 1 recal:"); ! 1516: #endif ! 1517: /* after a second recalibrate, we still haven't ! 1518: * reached track 0. Probably no drive. Raise an ! 1519: * error, as failing immediately might upset ! 1520: * computers possessed by the Devil :-) */ ! 1521: cont->error(); ! 1522: cont->redo(); ! 1523: return; ! 1524: case NEED_2_RECAL: ! 1525: #ifdef DEBUGT ! 1526: debugt("recal interrupt need 2 recal:"); ! 1527: #endif ! 1528: /* If we already did a recalibrate, ! 1529: * and we are not at track 0, this ! 1530: * means we have moved. (The only way ! 1531: * not to move at recalibration is to ! 1532: * be already at track 0.) Clear the ! 1533: * new change flag */ ! 1534: #ifdef DCL_DEBUG ! 1535: if (DP->flags & FD_DEBUG){ ! 1536: DPRINT("clearing NEWCHANGE flag because of second recalibrate\n"); ! 1537: } ! 1538: #endif ! 1539: ! 1540: CLEARF(FD_DISK_NEWCHANGE); ! 1541: DRS->select_date = jiffies; ! 1542: /* fall through */ ! 1543: default: ! 1544: #ifdef DEBUGT ! 1545: debugt("recal interrupt default:"); ! 1546: #endif ! 1547: /* Recalibrate moves the head by at ! 1548: * most 80 steps. If after one ! 1549: * recalibrate we don't have reached ! 1550: * track 0, this might mean that we ! 1551: * started beyond track 80. Try ! 1552: * again. */ ! 1553: DRS->track = NEED_1_RECAL; ! 1554: break; ! 1555: } ! 1556: } else ! 1557: DRS->track = ST1; ! 1558: floppy_ready(); ! 1559: } ! 1560: ! 1561: /* ! 1562: * Unexpected interrupt - Print as much debugging info as we can... ! 1563: * All bets are off... ! 1564: */ ! 1565: static void unexpected_floppy_interrupt(void) ! 1566: { ! 1567: int i; ! 1568: if (initialising) ! 1569: return; ! 1570: if (print_unex){ ! 1571: DPRINT("unexpected interrupt\n"); ! 1572: if (inr >= 0) ! 1573: for (i=0; i<inr; i++) ! 1574: printk("%d %x\n", i, reply_buffer[i]); ! 1575: } ! 1576: while(1){ ! 1577: output_byte(FD_SENSEI); ! 1578: inr=result(); ! 1579: if (inr != 2) ! 1580: break; ! 1581: if (print_unex){ ! 1582: printk("sensei\n"); ! 1583: for (i=0; i<inr; i++) ! 1584: printk("%d %x\n", i, reply_buffer[i]); ! 1585: } ! 1586: } ! 1587: FDCS->reset = 1; ! 1588: } ! 1589: ! 1590: static struct tq_struct floppy_tq = ! 1591: { 0, 0, (void *) (void *) unexpected_floppy_interrupt, 0 }; ! 1592: ! 1593: /* interrupt handler */ ! 1594: static void floppy_interrupt(int irq, struct pt_regs * regs) ! 1595: { ! 1596: void (*handler)(void) = DEVICE_INTR; ! 1597: ! 1598: lasthandler = handler; ! 1599: interruptjiffies = jiffies; ! 1600: ! 1601: floppy_enable_hlt(); ! 1602: CLEAR_INTR; ! 1603: if (fdc >= N_FDC || FDCS->address == -1){ ! 1604: /* we don't even know which FDC is the culprit */ ! 1605: printk("DOR0=%x\n", fdc_state[0].dor); ! 1606: printk("floppy interrupt on bizarre fdc %d\n",fdc); ! 1607: printk("handler=%p\n", handler); ! 1608: is_alive("bizarre fdc"); ! 1609: return; ! 1610: } ! 1611: inr = result(); ! 1612: if (!handler){ ! 1613: unexpected_floppy_interrupt(); ! 1614: is_alive("unexpected"); ! 1615: return; ! 1616: } ! 1617: if (inr == 0){ ! 1618: do { ! 1619: output_byte(FD_SENSEI); ! 1620: inr = result(); ! 1621: } while ((ST0 & 0x83) != UNIT(current_drive) && inr == 2); ! 1622: } ! 1623: floppy_tq.routine = (void *)(void *) handler; ! 1624: queue_task_irq(&floppy_tq, &tq_timer); ! 1625: is_alive("normal interrupt end"); ! 1626: } ! 1627: ! 1628: static void recalibrate_floppy(void) ! 1629: { ! 1630: #ifdef DEBUGT ! 1631: debugt("recalibrate floppy:"); ! 1632: #endif ! 1633: SET_INTR(recal_interrupt); ! 1634: output_byte(FD_RECALIBRATE); ! 1635: LAST_OUT(UNIT(current_drive)); ! 1636: } ! 1637: ! 1638: /* ! 1639: * Must do 4 FD_SENSEIs after reset because of ``drive polling''. ! 1640: */ ! 1641: static void reset_interrupt(void) ! 1642: { ! 1643: #ifdef DEBUGT ! 1644: debugt("reset interrupt:"); ! 1645: #endif ! 1646: /* fdc_specify(); reprogram fdc */ ! 1647: result(); /* get the status ready for set_fdc */ ! 1648: if (FDCS->reset) { ! 1649: printk("reset set in interrupt, calling %p\n", cont->error); ! 1650: cont->error(); /* a reset just after a reset. BAD! */ ! 1651: } ! 1652: cont->redo(); ! 1653: } ! 1654: ! 1655: /* ! 1656: * reset is done by pulling bit 2 of DOR low for a while (old FDC's), ! 1657: * or by setting the self clearing bit 7 of STATUS (newer FDC's) ! 1658: */ ! 1659: static void reset_fdc(void) ! 1660: { ! 1661: SET_INTR(reset_interrupt); ! 1662: FDCS->reset = 0; ! 1663: reset_fdc_info(0); ! 1664: if (FDCS->version >= FDC_82077) ! 1665: fd_outb(0x80 | (FDCS->dtr &3), FD_STATUS); ! 1666: else { ! 1667: fd_outb(FDCS->dor & ~0x04, FD_DOR); ! 1668: udelay(FD_RESET_DELAY); ! 1669: outb(FDCS->dor, FD_DOR); ! 1670: } ! 1671: } ! 1672: ! 1673: static void empty(void) ! 1674: { ! 1675: } ! 1676: ! 1677: void show_floppy(void) ! 1678: { ! 1679: int i; ! 1680: ! 1681: printk("\n"); ! 1682: printk("floppy driver state\n"); ! 1683: printk("-------------------\n"); ! 1684: printk("now=%ld last interrupt=%d last called handler=%p\n", ! 1685: jiffies, interruptjiffies, lasthandler); ! 1686: ! 1687: ! 1688: #ifdef FLOPPY_SANITY_CHECK ! 1689: printk("timeout_message=%s\n", timeout_message); ! 1690: printk("last output bytes:\n"); ! 1691: for (i=0; i < OLOGSIZE; i++) ! 1692: printk("%2x %2x %ld\n", ! 1693: output_log[(i+output_log_pos) % OLOGSIZE].data, ! 1694: output_log[(i+output_log_pos) % OLOGSIZE].status, ! 1695: output_log[(i+output_log_pos) % OLOGSIZE].jiffies); ! 1696: printk("last result at %d\n", resultjiffies); ! 1697: printk("last redo_fd_request at %d\n", lastredo); ! 1698: for (i=0; i<resultsize; i++){ ! 1699: printk("%2x ", reply_buffer[i]); ! 1700: } ! 1701: printk("\n"); ! 1702: #endif ! 1703: ! 1704: printk("status=%x\n", fd_inb(FD_STATUS)); ! 1705: printk("fdc_busy=%d\n", fdc_busy); ! 1706: if (DEVICE_INTR) ! 1707: printk("DEVICE_INTR=%p\n", DEVICE_INTR); ! 1708: if (floppy_tq.sync) ! 1709: printk("floppy_tq.routine=%p\n", floppy_tq.routine); ! 1710: if (fd_timer.prev) ! 1711: printk("fd_timer.function=%p\n", fd_timer.function); ! 1712: if (fd_timeout.prev){ ! 1713: printk("timer_table=%p\n",fd_timeout.function); ! 1714: printk("expires=%ld\n",fd_timeout.expires-jiffies); ! 1715: printk("now=%ld\n",jiffies); ! 1716: } ! 1717: printk("cont=%p\n", cont); ! 1718: printk("CURRENT=%p\n", CURRENT); ! 1719: printk("command_status=%d\n", command_status); ! 1720: printk("\n"); ! 1721: } ! 1722: ! 1723: static void floppy_shutdown(void) ! 1724: { ! 1725: if (!initialising) ! 1726: show_floppy(); ! 1727: CLEAR_INTR; ! 1728: floppy_tq.routine = (void *)(void *) empty; ! 1729: del_timer(&fd_timer); ! 1730: sti(); ! 1731: ! 1732: floppy_enable_hlt(); ! 1733: fd_disable_dma(); ! 1734: /* avoid dma going to a random drive after shutdown */ ! 1735: ! 1736: if (!initialising) ! 1737: DPRINT("floppy timeout\n"); ! 1738: FDCS->reset = 1; ! 1739: if (cont){ ! 1740: cont->done(0); ! 1741: cont->redo(); /* this will recall reset when needed */ ! 1742: } else { ! 1743: printk("no cont in shutdown!\n"); ! 1744: process_fd_request(); ! 1745: } ! 1746: is_alive("floppy shutdown"); ! 1747: } ! 1748: /*typedef void (*timeout_fn)(unsigned long);*/ ! 1749: ! 1750: /* start motor, check media-changed condition and write protection */ ! 1751: static int start_motor(void (*function)(void) ) ! 1752: { ! 1753: int mask, data; ! 1754: ! 1755: mask = 0xfc; ! 1756: data = UNIT(current_drive); ! 1757: if (!(raw_cmd->flags & FD_RAW_NO_MOTOR)){ ! 1758: if (!(FDCS->dor & (0x10 << UNIT(current_drive)))){ ! 1759: set_debugt(); ! 1760: /* no read since this drive is running */ ! 1761: DRS->first_read_date = 0; ! 1762: /* note motor start time if motor is not yet running */ ! 1763: DRS->spinup_date = jiffies; ! 1764: data |= (0x10 << UNIT(current_drive)); ! 1765: } ! 1766: } else ! 1767: if (FDCS->dor & (0x10 << UNIT(current_drive))) ! 1768: mask &= ~(0x10 << UNIT(current_drive)); ! 1769: ! 1770: /* starts motor and selects floppy */ ! 1771: del_timer(motor_off_timer + current_drive); ! 1772: set_dor(fdc, mask, data); ! 1773: ! 1774: /* wait_for_completion also schedules reset if needed. */ ! 1775: return(wait_for_completion(DRS->select_date+DP->select_delay, ! 1776: (timeout_fn) function)); ! 1777: } ! 1778: ! 1779: static void floppy_ready(void) ! 1780: { ! 1781: CHECK_RESET; ! 1782: if (start_motor(floppy_ready)) return; ! 1783: if (fdc_dtr()) return; ! 1784: ! 1785: #ifdef DCL_DEBUG ! 1786: if (DP->flags & FD_DEBUG){ ! 1787: DPRINT("calling disk change from floppy_ready\n"); ! 1788: } ! 1789: #endif ! 1790: ! 1791: if (!(raw_cmd->flags & FD_RAW_NO_MOTOR) && ! 1792: disk_change(current_drive) && ! 1793: !DP->select_delay) ! 1794: twaddle(); /* this clears the dcl on certain drive/controller ! 1795: * combinations */ ! 1796: ! 1797: if (raw_cmd->flags & (FD_RAW_NEED_SEEK | FD_RAW_NEED_DISK)){ ! 1798: perpendicular_mode(); ! 1799: fdc_specify(); /* must be done here because of hut, hlt ... */ ! 1800: seek_floppy(); ! 1801: } else ! 1802: setup_rw_floppy(); ! 1803: } ! 1804: ! 1805: static void floppy_start(void) ! 1806: { ! 1807: reschedule_timeout(CURRENTD, "floppy start", 0); ! 1808: ! 1809: scandrives(); ! 1810: #ifdef DCL_DEBUG ! 1811: if (DP->flags & FD_DEBUG){ ! 1812: DPRINT("setting NEWCHANGE in floppy_start\n"); ! 1813: } ! 1814: #endif ! 1815: SETF(FD_DISK_NEWCHANGE); ! 1816: floppy_ready(); ! 1817: } ! 1818: ! 1819: /* ! 1820: * ======================================================================== ! 1821: * here ends the bottom half. Exported routines are: ! 1822: * floppy_start, floppy_off, floppy_ready, lock_fdc, unlock_fdc, set_fdc, ! 1823: * start_motor, reset_fdc, reset_fdc_info, interpret_errors. ! 1824: * Initialisation also uses output_byte, result, set_dor, floppy_interrupt ! 1825: * and set_dor. ! 1826: * ======================================================================== ! 1827: */ ! 1828: /* ! 1829: * General purpose continuations. ! 1830: * ============================== ! 1831: */ ! 1832: ! 1833: static void do_wakeup(void) ! 1834: { ! 1835: reschedule_timeout(MAXTIMEOUT, "do wakeup", 0); ! 1836: cont = 0; ! 1837: command_status += 2; ! 1838: wake_up(&command_done); ! 1839: } ! 1840: ! 1841: static struct cont_t wakeup_cont={ ! 1842: empty, ! 1843: do_wakeup, ! 1844: empty, ! 1845: (done_f)empty ! 1846: }; ! 1847: ! 1848: static int wait_til_done(void (*handler)(void), int interruptible) ! 1849: { ! 1850: int ret; ! 1851: ! 1852: floppy_tq.routine = (void *)(void *) handler; ! 1853: queue_task(&floppy_tq, &tq_timer); ! 1854: ! 1855: cli(); ! 1856: while(command_status < 2 && NO_SIGNAL){ ! 1857: is_alive("wait_til_done"); ! 1858: if (interruptible) ! 1859: interruptible_sleep_on(&command_done); ! 1860: else ! 1861: sleep_on(&command_done); ! 1862: } ! 1863: if (command_status < 2){ ! 1864: floppy_shutdown(); ! 1865: sti(); ! 1866: process_fd_request(); ! 1867: return -EINTR; ! 1868: } ! 1869: sti(); ! 1870: ! 1871: if (FDCS->reset) ! 1872: command_status = FD_COMMAND_ERROR; ! 1873: if (command_status == FD_COMMAND_OKAY) ! 1874: ret=0; ! 1875: else ! 1876: ret=-EIO; ! 1877: command_status = FD_COMMAND_NONE; ! 1878: return ret; ! 1879: } ! 1880: ! 1881: static void generic_done(int result) ! 1882: { ! 1883: command_status = result; ! 1884: cont = &wakeup_cont; ! 1885: } ! 1886: ! 1887: static void generic_success(void) ! 1888: { ! 1889: cont->done(1); ! 1890: } ! 1891: ! 1892: static void generic_failure(void) ! 1893: { ! 1894: cont->done(0); ! 1895: } ! 1896: ! 1897: static void success_and_wakeup(void) ! 1898: { ! 1899: generic_success(); ! 1900: cont->redo(); ! 1901: } ! 1902: ! 1903: ! 1904: /* ! 1905: * formatting and rw support. ! 1906: * ========================== ! 1907: */ ! 1908: ! 1909: static int next_valid_format(void) ! 1910: { ! 1911: int probed_format; ! 1912: ! 1913: probed_format = DRS->probed_format; ! 1914: while(1){ ! 1915: if (probed_format >= 8 || ! 1916: !DP->autodetect[probed_format]){ ! 1917: DRS->probed_format = 0; ! 1918: return 1; ! 1919: } ! 1920: if (floppy_type[DP->autodetect[probed_format]].sect){ ! 1921: DRS->probed_format = probed_format; ! 1922: return 0; ! 1923: } ! 1924: probed_format++; ! 1925: } ! 1926: } ! 1927: ! 1928: static void bad_flp_intr(void) ! 1929: { ! 1930: if (probing){ ! 1931: DRS->probed_format++; ! 1932: if (!next_valid_format()) ! 1933: return; ! 1934: } ! 1935: (*errors)++; ! 1936: INFBOUND(DRWE->badness, *errors); ! 1937: if (*errors > DP->max_errors.abort) ! 1938: cont->done(0); ! 1939: if (*errors > DP->max_errors.reset) ! 1940: FDCS->reset = 1; ! 1941: else if (*errors > DP->max_errors.recal) ! 1942: DRS->track = NEED_2_RECAL; ! 1943: } ! 1944: ! 1945: static void set_floppy(kdev_t device) ! 1946: { ! 1947: if (TYPE(device)) ! 1948: floppy = TYPE(device) + floppy_type; ! 1949: else ! 1950: floppy = current_type[ DRIVE(device) ]; ! 1951: } ! 1952: ! 1953: /* ! 1954: * formatting and support. ! 1955: * ======================= ! 1956: */ ! 1957: static void format_interrupt(void) ! 1958: { ! 1959: switch (interpret_errors()){ ! 1960: case 1: ! 1961: cont->error(); ! 1962: case 2: ! 1963: break; ! 1964: case 0: ! 1965: cont->done(1); ! 1966: } ! 1967: cont->redo(); ! 1968: } ! 1969: ! 1970: #define CODE2SIZE (ssize = ((1 << SIZECODE) + 3) >> 2) ! 1971: #define FM_MODE(x,y) ((y) & ~(((x)->rate & 0x80) >>1)) ! 1972: #define CT(x) ((x) | 0x40) ! 1973: static void setup_format_params(int track) ! 1974: { ! 1975: struct fparm { ! 1976: unsigned char track,head,sect,size; ! 1977: } *here = (struct fparm *)floppy_track_buffer; ! 1978: int il,n; ! 1979: int count,head_shift,track_shift; ! 1980: ! 1981: raw_cmd = &default_raw_cmd; ! 1982: raw_cmd->track = track; ! 1983: ! 1984: raw_cmd->flags = FD_RAW_WRITE | FD_RAW_INTR | FD_RAW_SPIN | ! 1985: /*FD_RAW_NEED_DISK |*/ FD_RAW_NEED_SEEK; ! 1986: raw_cmd->rate = floppy->rate & 0x43; ! 1987: raw_cmd->cmd_count = NR_F; ! 1988: COMMAND = FM_MODE(floppy,FD_FORMAT); ! 1989: DR_SELECT = UNIT(current_drive) + PH_HEAD(floppy,format_req.head); ! 1990: F_SIZECODE = FD_SIZECODE(floppy); ! 1991: F_SECT_PER_TRACK = floppy->sect << 2 >> F_SIZECODE; ! 1992: F_GAP = floppy->fmt_gap; ! 1993: F_FILL = FD_FILL_BYTE; ! 1994: ! 1995: raw_cmd->kernel_data = floppy_track_buffer; ! 1996: raw_cmd->length = 4 * F_SECT_PER_TRACK; ! 1997: ! 1998: /* allow for about 30ms for data transport per track */ ! 1999: head_shift = (F_SECT_PER_TRACK + 5) / 6; ! 2000: ! 2001: /* a ``cylinder'' is two tracks plus a little stepping time */ ! 2002: track_shift = 2 * head_shift + 3; ! 2003: ! 2004: /* position of logical sector 1 on this track */ ! 2005: n = (track_shift * format_req.track + head_shift * format_req.head) ! 2006: % F_SECT_PER_TRACK; ! 2007: ! 2008: /* determine interleave */ ! 2009: il = 1; ! 2010: if (floppy->sect > DP->interleave_sect && F_SIZECODE == 2) ! 2011: il++; ! 2012: ! 2013: /* initialize field */ ! 2014: for (count = 0; count < F_SECT_PER_TRACK; ++count) { ! 2015: here[count].track = format_req.track; ! 2016: here[count].head = format_req.head; ! 2017: here[count].sect = 0; ! 2018: here[count].size = F_SIZECODE; ! 2019: } ! 2020: /* place logical sectors */ ! 2021: for (count = 1; count <= F_SECT_PER_TRACK; ++count) { ! 2022: here[n].sect = count; ! 2023: n = (n+il) % F_SECT_PER_TRACK; ! 2024: if (here[n].sect) { /* sector busy, find next free sector */ ! 2025: ++n; ! 2026: if (n>= F_SECT_PER_TRACK) { ! 2027: n-=F_SECT_PER_TRACK; ! 2028: while (here[n].sect) ++n; ! 2029: } ! 2030: } ! 2031: } ! 2032: } ! 2033: ! 2034: static void redo_format(void) ! 2035: { ! 2036: buffer_track = -1; ! 2037: setup_format_params(format_req.track << STRETCH(floppy)); ! 2038: floppy_start(); ! 2039: #ifdef DEBUGT ! 2040: debugt("queue format request"); ! 2041: #endif ! 2042: } ! 2043: ! 2044: static struct cont_t format_cont={ ! 2045: format_interrupt, ! 2046: redo_format, ! 2047: bad_flp_intr, ! 2048: generic_done }; ! 2049: ! 2050: static int do_format(kdev_t device, struct format_descr *tmp_format_req) ! 2051: { ! 2052: int ret; ! 2053: int drive=DRIVE(device); ! 2054: ! 2055: LOCK_FDC(drive,1); ! 2056: set_floppy(device); ! 2057: if (!floppy || ! 2058: floppy->track > DP->tracks || ! 2059: tmp_format_req->track >= floppy->track || ! 2060: tmp_format_req->head >= floppy->head || ! 2061: (floppy->sect << 2) % (1 << FD_SIZECODE(floppy)) || ! 2062: !floppy->fmt_gap) { ! 2063: process_fd_request(); ! 2064: return -EINVAL; ! 2065: } ! 2066: format_req = *tmp_format_req; ! 2067: format_errors = 0; ! 2068: cont = &format_cont; ! 2069: errors = &format_errors; ! 2070: IWAIT(redo_format); ! 2071: process_fd_request(); ! 2072: return ret; ! 2073: } ! 2074: ! 2075: /* ! 2076: * Buffer read/write and support ! 2077: * ============================= ! 2078: */ ! 2079: ! 2080: /* new request_done. Can handle physical sectors which are smaller than a ! 2081: * logical buffer */ ! 2082: static void request_done(int uptodate) ! 2083: { ! 2084: int block; ! 2085: ! 2086: probing = 0; ! 2087: reschedule_timeout(MAXTIMEOUT, "request done %d", uptodate); ! 2088: ! 2089: if (!CURRENT){ ! 2090: DPRINT("request list destroyed in floppy request done\n"); ! 2091: return; ! 2092: } ! 2093: if (uptodate){ ! 2094: /* maintain values for invalidation on geometry ! 2095: * change */ ! 2096: block = current_count_sectors + CURRENT->sector; ! 2097: INFBOUND(DRS->maxblock, block); ! 2098: if (block > floppy->sect) ! 2099: DRS->maxtrack = 1; ! 2100: ! 2101: /* unlock chained buffers */ ! 2102: while (current_count_sectors && CURRENT && ! 2103: current_count_sectors >= CURRENT->current_nr_sectors){ ! 2104: current_count_sectors -= CURRENT->current_nr_sectors; ! 2105: CURRENT->nr_sectors -= CURRENT->current_nr_sectors; ! 2106: CURRENT->sector += CURRENT->current_nr_sectors; ! 2107: end_request(1); ! 2108: } ! 2109: if (current_count_sectors && CURRENT){ ! 2110: /* "unlock" last subsector */ ! 2111: CURRENT->buffer += current_count_sectors <<9; ! 2112: CURRENT->current_nr_sectors -= current_count_sectors; ! 2113: CURRENT->nr_sectors -= current_count_sectors; ! 2114: CURRENT->sector += current_count_sectors; ! 2115: return; ! 2116: } ! 2117: ! 2118: if (current_count_sectors && !CURRENT) ! 2119: DPRINT("request list destroyed in floppy request done\n"); ! 2120: ! 2121: } else { ! 2122: if (CURRENT->cmd == WRITE) { ! 2123: /* record write error information */ ! 2124: DRWE->write_errors++; ! 2125: if (DRWE->write_errors == 1) { ! 2126: DRWE->first_error_sector = CURRENT->sector; ! 2127: DRWE->first_error_generation = DRS->generation; ! 2128: } ! 2129: DRWE->last_error_sector = CURRENT->sector; ! 2130: DRWE->last_error_generation = DRS->generation; ! 2131: } ! 2132: end_request(0); ! 2133: } ! 2134: } ! 2135: ! 2136: /* Interrupt handler evaluating the result of the r/w operation */ ! 2137: static void rw_interrupt(void) ! 2138: { ! 2139: int nr_sectors, ssize; ! 2140: ! 2141: if (!DRS->first_read_date) ! 2142: DRS->first_read_date = jiffies; ! 2143: ! 2144: nr_sectors = 0; ! 2145: CODE2SIZE; ! 2146: nr_sectors = ((R_TRACK-TRACK)*floppy->head+R_HEAD-HEAD) * ! 2147: floppy->sect + ((R_SECTOR-SECTOR) << SIZECODE >> 2) - ! 2148: (sector_t % floppy->sect) % ssize; ! 2149: ! 2150: #ifdef FLOPPY_SANITY_CHECK ! 2151: if (nr_sectors > current_count_sectors + ssize - ! 2152: (current_count_sectors + sector_t) % ssize + ! 2153: sector_t % ssize){ ! 2154: DPRINT2("long rw: %x instead of %lx\n", ! 2155: nr_sectors, current_count_sectors); ! 2156: printk("rs=%d s=%d\n", R_SECTOR, SECTOR); ! 2157: printk("rh=%d h=%d\n", R_HEAD, HEAD); ! 2158: printk("rt=%d t=%d\n", R_TRACK, TRACK); ! 2159: printk("spt=%d st=%d ss=%d\n", SECT_PER_TRACK, ! 2160: sector_t, ssize); ! 2161: } ! 2162: #endif ! 2163: INFBOUND(nr_sectors,0); ! 2164: SUPBOUND(current_count_sectors, nr_sectors); ! 2165: ! 2166: switch (interpret_errors()){ ! 2167: case 2: ! 2168: cont->redo(); ! 2169: return; ! 2170: case 1: ! 2171: if (!current_count_sectors){ ! 2172: cont->error(); ! 2173: cont->redo(); ! 2174: return; ! 2175: } ! 2176: break; ! 2177: case 0: ! 2178: if (!current_count_sectors){ ! 2179: cont->redo(); ! 2180: return; ! 2181: } ! 2182: current_type[current_drive] = floppy; ! 2183: floppy_sizes[TOMINOR(current_drive) ]= floppy->size>>1; ! 2184: break; ! 2185: } ! 2186: ! 2187: if (probing) { ! 2188: if (DP->flags & FTD_MSG) ! 2189: DPRINT2("Auto-detected floppy type %s in fd%d\n", ! 2190: floppy->name,current_drive); ! 2191: current_type[current_drive] = floppy; ! 2192: floppy_sizes[TOMINOR(current_drive)] = floppy->size >> 1; ! 2193: probing = 0; ! 2194: } ! 2195: ! 2196: if (CT(COMMAND) != FD_READ || ! 2197: raw_cmd->kernel_data == CURRENT->buffer){ ! 2198: /* transfer directly from buffer */ ! 2199: cont->done(1); ! 2200: } else if (CT(COMMAND) == FD_READ){ ! 2201: buffer_track = raw_cmd->track; ! 2202: buffer_drive = current_drive; ! 2203: INFBOUND(buffer_max, nr_sectors + sector_t); ! 2204: } ! 2205: cont->redo(); ! 2206: } ! 2207: ! 2208: /* Compute maximal contiguous buffer size. */ ! 2209: static int buffer_chain_size(void) ! 2210: { ! 2211: struct buffer_head *bh; ! 2212: int size; ! 2213: char *base; ! 2214: ! 2215: base = CURRENT->buffer; ! 2216: size = CURRENT->current_nr_sectors << 9; ! 2217: bh = CURRENT->bh; ! 2218: ! 2219: if (bh){ ! 2220: bh = bh->b_reqnext; ! 2221: while (bh && bh->b_data == base + size){ ! 2222: size += bh->b_size; ! 2223: bh = bh->b_reqnext; ! 2224: } ! 2225: } ! 2226: return size >> 9; ! 2227: } ! 2228: ! 2229: /* Compute the maximal transfer size */ ! 2230: static int transfer_size(int ssize, int max_sector, int max_size) ! 2231: { ! 2232: SUPBOUND(max_sector, sector_t + max_size); ! 2233: ! 2234: /* alignment */ ! 2235: max_sector -= (max_sector % floppy->sect) % ssize; ! 2236: ! 2237: /* transfer size, beginning not aligned */ ! 2238: current_count_sectors = max_sector - sector_t ; ! 2239: ! 2240: return max_sector; ! 2241: } ! 2242: ! 2243: /* ! 2244: * Move data from/to the track buffer to/from the buffer cache. ! 2245: */ ! 2246: static void copy_buffer(int ssize, int max_sector, int max_sector_2) ! 2247: { ! 2248: int remaining; /* number of transferred 512-byte sectors */ ! 2249: struct buffer_head *bh; ! 2250: char *buffer, *dma_buffer; ! 2251: int size; ! 2252: ! 2253: max_sector = transfer_size(ssize, ! 2254: minimum(max_sector, max_sector_2), ! 2255: CURRENT->nr_sectors); ! 2256: ! 2257: if (current_count_sectors <= 0 && CT(COMMAND) == FD_WRITE && ! 2258: buffer_max > sector_t + CURRENT->nr_sectors) ! 2259: current_count_sectors = minimum(buffer_max - sector_t, ! 2260: CURRENT->nr_sectors); ! 2261: ! 2262: remaining = current_count_sectors << 9; ! 2263: #ifdef FLOPPY_SANITY_CHECK ! 2264: if ((remaining >> 9) > CURRENT->nr_sectors && ! 2265: CT(COMMAND) == FD_WRITE){ ! 2266: DPRINT("in copy buffer\n"); ! 2267: printk("current_count_sectors=%ld\n", current_count_sectors); ! 2268: printk("remaining=%d\n", remaining >> 9); ! 2269: printk("CURRENT->nr_sectors=%ld\n",CURRENT->nr_sectors); ! 2270: printk("CURRENT->current_nr_sectors=%ld\n", ! 2271: CURRENT->current_nr_sectors); ! 2272: printk("max_sector=%d\n", max_sector); ! 2273: printk("ssize=%d\n", ssize); ! 2274: } ! 2275: #endif ! 2276: ! 2277: buffer_max = maximum(max_sector, buffer_max); ! 2278: ! 2279: dma_buffer = floppy_track_buffer + ((sector_t - buffer_min) << 9); ! 2280: ! 2281: bh = CURRENT->bh; ! 2282: size = CURRENT->current_nr_sectors << 9; ! 2283: buffer = CURRENT->buffer; ! 2284: ! 2285: while (remaining > 0){ ! 2286: SUPBOUND(size, remaining); ! 2287: #ifdef FLOPPY_SANITY_CHECK ! 2288: if (dma_buffer + size > ! 2289: floppy_track_buffer + (max_buffer_sectors << 10) || ! 2290: dma_buffer < floppy_track_buffer){ ! 2291: DPRINT1("buffer overrun in copy buffer %d\n", ! 2292: (int) ((floppy_track_buffer - dma_buffer) >>9)); ! 2293: printk("sector_t=%d buffer_min=%d\n", ! 2294: sector_t, buffer_min); ! 2295: printk("current_count_sectors=%ld\n", ! 2296: current_count_sectors); ! 2297: if (CT(COMMAND) == FD_READ) ! 2298: printk("read\n"); ! 2299: if (CT(COMMAND) == FD_READ) ! 2300: printk("write\n"); ! 2301: break; ! 2302: } ! 2303: if (((unsigned long)buffer) % 512) ! 2304: DPRINT1("%p buffer not aligned\n", buffer); ! 2305: #endif ! 2306: if (CT(COMMAND) == FD_READ) { ! 2307: fd_cacheflush(dma_buffer, size); ! 2308: memcpy(buffer, dma_buffer, size); ! 2309: } else { ! 2310: memcpy(dma_buffer, buffer, size); ! 2311: fd_cacheflush(dma_buffer, size); ! 2312: } ! 2313: remaining -= size; ! 2314: if (!remaining) ! 2315: break; ! 2316: ! 2317: dma_buffer += size; ! 2318: bh = bh->b_reqnext; ! 2319: #ifdef FLOPPY_SANITY_CHECK ! 2320: if (!bh){ ! 2321: DPRINT("bh=null in copy buffer after copy\n"); ! 2322: break; ! 2323: } ! 2324: #endif ! 2325: size = bh->b_size; ! 2326: buffer = bh->b_data; ! 2327: } ! 2328: #ifdef FLOPPY_SANITY_CHECK ! 2329: if (remaining){ ! 2330: if (remaining > 0) ! 2331: max_sector -= remaining >> 9; ! 2332: DPRINT1("weirdness: remaining %d\n", remaining>>9); ! 2333: } ! 2334: #endif ! 2335: } ! 2336: ! 2337: /* ! 2338: * Formulate a read/write request. ! 2339: * this routine decides where to load the data (directly to buffer, or to ! 2340: * tmp floppy area), how much data to load (the size of the buffer, the whole ! 2341: * track, or a single sector) ! 2342: * All floppy_track_buffer handling goes in here. If we ever add track buffer ! 2343: * allocation on the fly, it should be done here. No other part should need ! 2344: * modification. ! 2345: */ ! 2346: ! 2347: static int make_raw_rw_request(void) ! 2348: { ! 2349: int aligned_sector_t; ! 2350: int max_sector, max_size, tracksize, ssize; ! 2351: ! 2352: set_fdc(DRIVE(CURRENT->rq_dev)); ! 2353: ! 2354: raw_cmd = &default_raw_cmd; ! 2355: raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_DISK | FD_RAW_NEED_DISK | ! 2356: FD_RAW_NEED_SEEK; ! 2357: raw_cmd->cmd_count = NR_RW; ! 2358: if (CURRENT->cmd == READ){ ! 2359: raw_cmd->flags |= FD_RAW_READ; ! 2360: COMMAND = FM_MODE(floppy,FD_READ); ! 2361: } else if (CURRENT->cmd == WRITE){ ! 2362: raw_cmd->flags |= FD_RAW_WRITE; ! 2363: COMMAND = FM_MODE(floppy,FD_WRITE); ! 2364: } else { ! 2365: DPRINT("make_raw_rw_request: unknown command\n"); ! 2366: return 0; ! 2367: } ! 2368: ! 2369: max_sector = floppy->sect * floppy->head; ! 2370: ! 2371: TRACK = CURRENT->sector / max_sector; ! 2372: sector_t = CURRENT->sector % max_sector; ! 2373: if (floppy->track && TRACK >= floppy->track) ! 2374: return 0; ! 2375: HEAD = sector_t / floppy->sect; ! 2376: ! 2377: if (((floppy->stretch & FD_SWAPSIDES) || TESTF(FD_NEED_TWADDLE)) && ! 2378: sector_t < floppy->sect) ! 2379: max_sector = floppy->sect; ! 2380: ! 2381: /* 2M disks have phantom sectors on the first track */ ! 2382: if ((floppy->rate & FD_2M) && (!TRACK) && (!HEAD)){ ! 2383: max_sector = 2 * floppy->sect / 3; ! 2384: if (sector_t >= max_sector){ ! 2385: current_count_sectors = minimum(floppy->sect - sector_t, ! 2386: CURRENT->nr_sectors); ! 2387: return 1; ! 2388: } ! 2389: SIZECODE = 2; ! 2390: } else ! 2391: SIZECODE = FD_SIZECODE(floppy); ! 2392: raw_cmd->rate = floppy->rate & 0x43; ! 2393: if ((floppy->rate & FD_2M) && ! 2394: (TRACK || HEAD) && ! 2395: raw_cmd->rate == 2) ! 2396: raw_cmd->rate = 1; ! 2397: ! 2398: if (SIZECODE) ! 2399: SIZECODE2 = 0xff; ! 2400: else ! 2401: SIZECODE2 = 0x80; ! 2402: raw_cmd->track = TRACK << STRETCH(floppy); ! 2403: DR_SELECT = UNIT(current_drive) + PH_HEAD(floppy,HEAD); ! 2404: GAP = floppy->gap; ! 2405: CODE2SIZE; ! 2406: SECT_PER_TRACK = floppy->sect << 2 >> SIZECODE; ! 2407: SECTOR = ((sector_t % floppy->sect) << 2 >> SIZECODE) + 1; ! 2408: tracksize = floppy->sect - floppy->sect % ssize; ! 2409: if (tracksize < floppy->sect){ ! 2410: SECT_PER_TRACK ++; ! 2411: if (tracksize <= sector_t % floppy->sect) ! 2412: SECTOR--; ! 2413: while (tracksize <= sector_t % floppy->sect){ ! 2414: while(tracksize + ssize > floppy->sect){ ! 2415: SIZECODE--; ! 2416: ssize >>= 1; ! 2417: } ! 2418: SECTOR++; SECT_PER_TRACK ++; ! 2419: tracksize += ssize; ! 2420: } ! 2421: max_sector = HEAD * floppy->sect + tracksize; ! 2422: } else if (!TRACK && !HEAD && !(floppy->rate & FD_2M) && probing) ! 2423: max_sector = floppy->sect; ! 2424: ! 2425: aligned_sector_t = sector_t - (sector_t % floppy->sect) % ssize; ! 2426: max_size = CURRENT->nr_sectors; ! 2427: if ((raw_cmd->track == buffer_track) && ! 2428: (current_drive == buffer_drive) && ! 2429: (sector_t >= buffer_min) && (sector_t < buffer_max)) { ! 2430: /* data already in track buffer */ ! 2431: if (CT(COMMAND) == FD_READ) { ! 2432: copy_buffer(1, max_sector, buffer_max); ! 2433: return 1; ! 2434: } ! 2435: } else if (aligned_sector_t != sector_t || CURRENT->nr_sectors < ssize){ ! 2436: if (CT(COMMAND) == FD_WRITE){ ! 2437: if (sector_t + CURRENT->nr_sectors > ssize && ! 2438: sector_t + CURRENT->nr_sectors < ssize + ssize) ! 2439: max_size = ssize + ssize; ! 2440: else ! 2441: max_size = ssize; ! 2442: } ! 2443: raw_cmd->flags &= ~FD_RAW_WRITE; ! 2444: raw_cmd->flags |= FD_RAW_READ; ! 2445: COMMAND = FM_MODE(floppy,FD_READ); ! 2446: } else if ((unsigned long)CURRENT->buffer < MAX_DMA_ADDRESS) { ! 2447: unsigned long dma_limit; ! 2448: int direct, indirect; ! 2449: ! 2450: indirect= transfer_size(ssize,max_sector,max_buffer_sectors*2) - ! 2451: sector_t; ! 2452: ! 2453: /* ! 2454: * Do NOT use minimum() here---MAX_DMA_ADDRESS is 64 bits wide ! 2455: * on a 64 bit machine! ! 2456: */ ! 2457: max_size = buffer_chain_size(); ! 2458: dma_limit = (MAX_DMA_ADDRESS - ((unsigned long) CURRENT->buffer)) >> 9; ! 2459: if ((unsigned long) max_size > dma_limit) { ! 2460: max_size = dma_limit; ! 2461: } ! 2462: /* 64 kb boundaries */ ! 2463: if (CROSS_64KB(CURRENT->buffer, max_size << 9)) ! 2464: max_size = (K_64 - ((long) CURRENT->buffer) % K_64)>>9; ! 2465: direct = transfer_size(ssize,max_sector,max_size) - sector_t; ! 2466: /* ! 2467: * We try to read tracks, but if we get too many errors, we ! 2468: * go back to reading just one sector at a time. ! 2469: * ! 2470: * This means we should be able to read a sector even if there ! 2471: * are other bad sectors on this track. ! 2472: */ ! 2473: if (!direct || ! 2474: (indirect * 2 > direct * 3 && ! 2475: *errors < DP->max_errors.read_track && ! 2476: /*!TESTF(FD_NEED_TWADDLE) &&*/ ! 2477: ((!probing || (DP->read_track&(1<<DRS->probed_format)))))){ ! 2478: max_size = CURRENT->nr_sectors; ! 2479: } else { ! 2480: raw_cmd->kernel_data = CURRENT->buffer; ! 2481: raw_cmd->length = current_count_sectors << 9; ! 2482: if (raw_cmd->length == 0){ ! 2483: DPRINT("zero dma transfer attempted from make_raw_request\n"); ! 2484: DPRINT3("indirect=%d direct=%d sector_t=%d", ! 2485: indirect, direct, sector_t); ! 2486: return 0; ! 2487: } ! 2488: return 2; ! 2489: } ! 2490: } ! 2491: ! 2492: if (CT(COMMAND) == FD_READ) ! 2493: max_size = max_sector; /* unbounded */ ! 2494: ! 2495: /* claim buffer track if needed */ ! 2496: if (buffer_track != raw_cmd->track || /* bad track */ ! 2497: buffer_drive !=current_drive || /* bad drive */ ! 2498: sector_t > buffer_max || ! 2499: sector_t < buffer_min || ! 2500: ((CT(COMMAND) == FD_READ || ! 2501: (aligned_sector_t == sector_t && CURRENT->nr_sectors >= ssize))&& ! 2502: max_sector > 2 * max_buffer_sectors + buffer_min && ! 2503: max_size + sector_t > 2 * max_buffer_sectors + buffer_min) ! 2504: /* not enough space */){ ! 2505: buffer_track = -1; ! 2506: buffer_drive = current_drive; ! 2507: buffer_max = buffer_min = aligned_sector_t; ! 2508: } ! 2509: raw_cmd->kernel_data = floppy_track_buffer + ! 2510: ((aligned_sector_t-buffer_min)<<9); ! 2511: ! 2512: if (CT(COMMAND) == FD_WRITE){ ! 2513: /* copy write buffer to track buffer. ! 2514: * if we get here, we know that the write ! 2515: * is either aligned or the data already in the buffer ! 2516: * (buffer will be overwritten) */ ! 2517: #ifdef FLOPPY_SANITY_CHECK ! 2518: if (sector_t != aligned_sector_t && buffer_track == -1) ! 2519: DPRINT("internal error offset !=0 on write\n"); ! 2520: #endif ! 2521: buffer_track = raw_cmd->track; ! 2522: buffer_drive = current_drive; ! 2523: copy_buffer(ssize, max_sector, 2*max_buffer_sectors+buffer_min); ! 2524: } else ! 2525: transfer_size(ssize, max_sector, ! 2526: 2*max_buffer_sectors+buffer_min-aligned_sector_t); ! 2527: ! 2528: /* round up current_count_sectors to get dma xfer size */ ! 2529: raw_cmd->length = sector_t+current_count_sectors-aligned_sector_t; ! 2530: raw_cmd->length = ((raw_cmd->length -1)|(ssize-1))+1; ! 2531: raw_cmd->length <<= 9; ! 2532: #ifdef FLOPPY_SANITY_CHECK ! 2533: if ((raw_cmd->length < current_count_sectors << 9) || ! 2534: (raw_cmd->kernel_data != CURRENT->buffer && ! 2535: CT(COMMAND) == FD_WRITE && ! 2536: (aligned_sector_t + (raw_cmd->length >> 9) > buffer_max || ! 2537: aligned_sector_t < buffer_min)) || ! 2538: raw_cmd->length % (128 << SIZECODE) || ! 2539: raw_cmd->length <= 0 || current_count_sectors <= 0){ ! 2540: DPRINT2("fractionary current count b=%lx s=%lx\n", ! 2541: raw_cmd->length, current_count_sectors); ! 2542: if (raw_cmd->kernel_data != CURRENT->buffer) ! 2543: printk("addr=%d, length=%ld\n", ! 2544: (int) ((raw_cmd->kernel_data - ! 2545: floppy_track_buffer) >> 9), ! 2546: current_count_sectors); ! 2547: printk("st=%d ast=%d mse=%d msi=%d\n", ! 2548: sector_t, aligned_sector_t, max_sector, max_size); ! 2549: printk("ssize=%x SIZECODE=%d\n", ssize, SIZECODE); ! 2550: printk("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n", ! 2551: COMMAND, SECTOR, HEAD, TRACK); ! 2552: printk("buffer drive=%d\n", buffer_drive); ! 2553: printk("buffer track=%d\n", buffer_track); ! 2554: printk("buffer_min=%d\n", buffer_min); ! 2555: printk("buffer_max=%d\n", buffer_max); ! 2556: return 0; ! 2557: } ! 2558: ! 2559: if (raw_cmd->kernel_data != CURRENT->buffer){ ! 2560: if (raw_cmd->kernel_data < floppy_track_buffer || ! 2561: current_count_sectors < 0 || ! 2562: raw_cmd->length < 0 || ! 2563: raw_cmd->kernel_data + raw_cmd->length > ! 2564: floppy_track_buffer + (max_buffer_sectors << 10)){ ! 2565: DPRINT("buffer overrun in schedule dma\n"); ! 2566: printk("sector_t=%d buffer_min=%d current_count=%ld\n", ! 2567: sector_t, buffer_min, ! 2568: raw_cmd->length >> 9); ! 2569: printk("current_count_sectors=%ld\n", ! 2570: current_count_sectors); ! 2571: if (CT(COMMAND) == FD_READ) ! 2572: printk("read\n"); ! 2573: if (CT(COMMAND) == FD_READ) ! 2574: printk("write\n"); ! 2575: return 0; ! 2576: } ! 2577: } else if (raw_cmd->length > CURRENT->nr_sectors << 9 || ! 2578: current_count_sectors > CURRENT->nr_sectors){ ! 2579: DPRINT("buffer overrun in direct transfer\n"); ! 2580: return 0; ! 2581: } else if (raw_cmd->length < current_count_sectors << 9){ ! 2582: DPRINT("more sectors than bytes\n"); ! 2583: printk("bytes=%ld\n", raw_cmd->length >> 9); ! 2584: printk("sectors=%ld\n", current_count_sectors); ! 2585: } ! 2586: if (raw_cmd->length == 0){ ! 2587: DPRINT("zero dma transfer attempted from make_raw_request\n"); ! 2588: return 0; ! 2589: } ! 2590: #endif ! 2591: return 2; ! 2592: } ! 2593: ! 2594: static void redo_fd_request(void) ! 2595: { ! 2596: #define REPEAT {request_done(0); continue; } ! 2597: kdev_t device; ! 2598: int tmp; ! 2599: ! 2600: lastredo = jiffies; ! 2601: if (current_drive < N_DRIVE) ! 2602: floppy_off(current_drive); ! 2603: ! 2604: if (CURRENT && CURRENT->rq_status == RQ_INACTIVE){ ! 2605: DPRINT("current not active!\n"); ! 2606: return; ! 2607: } ! 2608: ! 2609: while(1){ ! 2610: if (!CURRENT) { ! 2611: CLEAR_INTR; ! 2612: unlock_fdc(); ! 2613: return; ! 2614: } ! 2615: if (MAJOR(CURRENT->rq_dev) != MAJOR_NR) ! 2616: panic(DEVICE_NAME ": request list destroyed"); ! 2617: if (CURRENT->bh && !buffer_locked(CURRENT->bh)) ! 2618: panic(DEVICE_NAME ": block not locked"); ! 2619: ! 2620: device = CURRENT->rq_dev; ! 2621: set_fdc(DRIVE(device)); ! 2622: reschedule_timeout(CURRENTD, "redo fd request", 0); ! 2623: ! 2624: set_floppy(device); ! 2625: raw_cmd = & default_raw_cmd; ! 2626: raw_cmd->flags = 0; ! 2627: if (start_motor(redo_fd_request)) return; ! 2628: if (test_bit(current_drive, &fake_change) || ! 2629: TESTF(FD_DISK_CHANGED)){ ! 2630: DPRINT("disk absent or changed during operation\n"); ! 2631: REPEAT; ! 2632: } ! 2633: if (!floppy) { /* Autodetection */ ! 2634: if (!probing){ ! 2635: DRS->probed_format = 0; ! 2636: if (next_valid_format()){ ! 2637: DPRINT("no autodetectable formats\n"); ! 2638: floppy = NULL; ! 2639: REPEAT; ! 2640: } ! 2641: } ! 2642: probing = 1; ! 2643: floppy = floppy_type+DP->autodetect[DRS->probed_format]; ! 2644: } else ! 2645: probing = 0; ! 2646: errors = & (CURRENT->errors); ! 2647: tmp = make_raw_rw_request(); ! 2648: if (tmp < 2){ ! 2649: request_done(tmp); ! 2650: continue; ! 2651: } ! 2652: ! 2653: if (TESTF(FD_NEED_TWADDLE)) ! 2654: twaddle(); ! 2655: floppy_tq.routine = (void *)(void *) floppy_start; ! 2656: queue_task(&floppy_tq, &tq_timer); ! 2657: #ifdef DEBUGT ! 2658: debugt("queue fd request"); ! 2659: #endif ! 2660: return; ! 2661: } ! 2662: #undef REPEAT ! 2663: } ! 2664: ! 2665: static struct cont_t rw_cont={ ! 2666: rw_interrupt, ! 2667: redo_fd_request, ! 2668: bad_flp_intr, ! 2669: request_done }; ! 2670: ! 2671: static struct tq_struct request_tq = ! 2672: { 0, 0, (void *) (void *) redo_fd_request, 0 }; ! 2673: ! 2674: static void process_fd_request(void) ! 2675: { ! 2676: cont = &rw_cont; ! 2677: queue_task(&request_tq, &tq_timer); ! 2678: } ! 2679: ! 2680: static void do_fd_request(void) ! 2681: { ! 2682: if (fdc_busy){ ! 2683: /* fdc busy, this new request will be treated when the ! 2684: current one is done */ ! 2685: is_alive("do fd request, old request running"); ! 2686: return; ! 2687: } ! 2688: lock_fdc(MAXTIMEOUT,0); ! 2689: process_fd_request(); ! 2690: is_alive("do fd request"); ! 2691: } ! 2692: ! 2693: static struct cont_t poll_cont={ ! 2694: success_and_wakeup, ! 2695: floppy_ready, ! 2696: generic_failure, ! 2697: generic_done }; ! 2698: ! 2699: static int poll_drive(int interruptible, int flag) ! 2700: { ! 2701: int ret; ! 2702: /* no auto-sense, just clear dcl */ ! 2703: raw_cmd = &default_raw_cmd; ! 2704: raw_cmd->flags= flag; ! 2705: raw_cmd->track=0; ! 2706: raw_cmd->cmd_count=0; ! 2707: cont = &poll_cont; ! 2708: #ifdef DCL_DEBUG ! 2709: if (DP->flags & FD_DEBUG){ ! 2710: DPRINT("setting NEWCHANGE in poll_drive\n"); ! 2711: } ! 2712: #endif ! 2713: SETF(FD_DISK_NEWCHANGE); ! 2714: WAIT(floppy_ready); ! 2715: return ret; ! 2716: } ! 2717: ! 2718: /* ! 2719: * User triggered reset ! 2720: * ==================== ! 2721: */ ! 2722: ! 2723: static void reset_intr(void) ! 2724: { ! 2725: printk("weird, reset interrupt called\n"); ! 2726: } ! 2727: ! 2728: static struct cont_t reset_cont={ ! 2729: reset_intr, ! 2730: success_and_wakeup, ! 2731: generic_failure, ! 2732: generic_done }; ! 2733: ! 2734: static int user_reset_fdc(int drive, int arg, int interruptible) ! 2735: { ! 2736: int ret; ! 2737: ! 2738: ret=0; ! 2739: LOCK_FDC(drive,interruptible); ! 2740: if (arg == FD_RESET_ALWAYS) ! 2741: FDCS->reset=1; ! 2742: if (FDCS->reset){ ! 2743: cont = &reset_cont; ! 2744: WAIT(reset_fdc); ! 2745: } ! 2746: process_fd_request(); ! 2747: return ret; ! 2748: } ! 2749: ! 2750: /* ! 2751: * Misc Ioctl's and support ! 2752: * ======================== ! 2753: */ ! 2754: static int fd_copyout(void *param, const void *address, int size) ! 2755: { ! 2756: int ret; ! 2757: ! 2758: ECALL(verify_area(VERIFY_WRITE,param,size)); ! 2759: fd_cacheflush(address, size); /* is this necessary ??? */ ! 2760: /* Ralf: Yes; only the l2 cache is completly chipset ! 2761: controlled */ ! 2762: memcpy_tofs(param,(void *) address, size); ! 2763: return 0; ! 2764: } ! 2765: ! 2766: static int fd_copyin(void *param, void *address, int size) ! 2767: { ! 2768: int ret; ! 2769: ! 2770: ECALL(verify_area(VERIFY_READ,param,size)); ! 2771: memcpy_fromfs((void *) address, param, size); ! 2772: return 0; ! 2773: } ! 2774: ! 2775: #define COPYOUT(x) ECALL(fd_copyout((void *)param, &(x), sizeof(x))) ! 2776: #define COPYIN(x) ECALL(fd_copyin((void *)param, &(x), sizeof(x))) ! 2777: ! 2778: static inline const char *drive_name(int type, int drive) ! 2779: { ! 2780: struct floppy_struct *floppy; ! 2781: ! 2782: if (type) ! 2783: floppy = floppy_type + type; ! 2784: else { ! 2785: if (UDP->native_format) ! 2786: floppy = floppy_type + UDP->native_format; ! 2787: else ! 2788: return "(null)"; ! 2789: } ! 2790: if (floppy->name) ! 2791: return floppy->name; ! 2792: else ! 2793: return "(null)"; ! 2794: } ! 2795: ! 2796: ! 2797: /* raw commands */ ! 2798: static void raw_cmd_done(int flag) ! 2799: { ! 2800: int i; ! 2801: ! 2802: if (!flag) { ! 2803: raw_cmd->flags = FD_RAW_FAILURE; ! 2804: raw_cmd->flags |= FD_RAW_HARDFAILURE; ! 2805: } else { ! 2806: raw_cmd->reply_count = inr; ! 2807: for (i=0; i< raw_cmd->reply_count; i++) ! 2808: raw_cmd->reply[i] = reply_buffer[i]; ! 2809: ! 2810: if (raw_cmd->flags & (FD_RAW_READ | FD_RAW_WRITE)) ! 2811: raw_cmd->length = get_dma_residue(FLOPPY_DMA); ! 2812: ! 2813: if ((raw_cmd->flags & FD_RAW_SOFTFAILURE) && ! 2814: (!raw_cmd->reply_count || (raw_cmd->reply[0] & 0xc0))) ! 2815: raw_cmd->flags |= FD_RAW_FAILURE; ! 2816: ! 2817: if (disk_change(current_drive)) ! 2818: raw_cmd->flags |= FD_RAW_DISK_CHANGE; ! 2819: else ! 2820: raw_cmd->flags &= ~FD_RAW_DISK_CHANGE; ! 2821: if (raw_cmd->flags & FD_RAW_NO_MOTOR_AFTER) ! 2822: motor_off_callback(current_drive); ! 2823: ! 2824: if (raw_cmd->next && ! 2825: (!(raw_cmd->flags & FD_RAW_FAILURE) || ! 2826: !(raw_cmd->flags & FD_RAW_STOP_IF_FAILURE)) && ! 2827: ((raw_cmd->flags & FD_RAW_FAILURE) || ! 2828: !(raw_cmd->flags &FD_RAW_STOP_IF_SUCCESS))) { ! 2829: raw_cmd = raw_cmd->next; ! 2830: return; ! 2831: } ! 2832: } ! 2833: generic_done(flag); ! 2834: } ! 2835: ! 2836: ! 2837: static struct cont_t raw_cmd_cont={ ! 2838: success_and_wakeup, ! 2839: floppy_start, ! 2840: generic_failure, ! 2841: raw_cmd_done ! 2842: }; ! 2843: ! 2844: static inline int raw_cmd_copyout(int cmd, char *param, ! 2845: struct floppy_raw_cmd *ptr) ! 2846: { ! 2847: struct old_floppy_raw_cmd old_raw_cmd; ! 2848: int ret; ! 2849: ! 2850: while(ptr) { ! 2851: if (cmd == OLDFDRAWCMD) { ! 2852: old_raw_cmd.flags = ptr->flags; ! 2853: old_raw_cmd.data = ptr->data; ! 2854: old_raw_cmd.length = ptr->length; ! 2855: old_raw_cmd.rate = ptr->rate; ! 2856: old_raw_cmd.reply_count = ptr->reply_count; ! 2857: memcpy(old_raw_cmd.reply, ptr->reply, 7); ! 2858: COPYOUT(old_raw_cmd); ! 2859: param += sizeof(old_raw_cmd); ! 2860: } else { ! 2861: COPYOUT(*ptr); ! 2862: param += sizeof(struct floppy_raw_cmd); ! 2863: } ! 2864: ! 2865: if ((ptr->flags & FD_RAW_READ) && ptr->buffer_length){ ! 2866: if (ptr->length>=0 && ptr->length<=ptr->buffer_length) ! 2867: ECALL(fd_copyout(ptr->data, ! 2868: ptr->kernel_data, ! 2869: ptr->buffer_length - ! 2870: ptr->length)); ! 2871: } ! 2872: ptr = ptr->next; ! 2873: } ! 2874: return 0; ! 2875: } ! 2876: ! 2877: ! 2878: static void raw_cmd_free(struct floppy_raw_cmd **ptr) ! 2879: { ! 2880: struct floppy_raw_cmd *next,*this; ! 2881: ! 2882: this = *ptr; ! 2883: *ptr = 0; ! 2884: while(this) { ! 2885: if (this->buffer_length) { ! 2886: free_pages((unsigned long)this->kernel_data, ! 2887: __get_order(this->buffer_length)); ! 2888: this->buffer_length = 0; ! 2889: } ! 2890: next = this->next; ! 2891: kfree(this); ! 2892: this = next; ! 2893: } ! 2894: } ! 2895: ! 2896: ! 2897: static inline int raw_cmd_copyin(int cmd, char *param, ! 2898: struct floppy_raw_cmd **rcmd) ! 2899: { ! 2900: struct floppy_raw_cmd *ptr; ! 2901: struct old_floppy_raw_cmd old_raw_cmd; ! 2902: int ret; ! 2903: int i; ! 2904: ! 2905: *rcmd = 0; ! 2906: while(1) { ! 2907: ptr = (struct floppy_raw_cmd *) ! 2908: kmalloc(sizeof(struct floppy_raw_cmd), GFP_USER); ! 2909: if (!ptr) ! 2910: return -ENOMEM; ! 2911: *rcmd = ptr; ! 2912: if (cmd == OLDFDRAWCMD){ ! 2913: COPYIN(old_raw_cmd); ! 2914: ptr->flags = old_raw_cmd.flags; ! 2915: ptr->data = old_raw_cmd.data; ! 2916: ptr->length = old_raw_cmd.length; ! 2917: ptr->rate = old_raw_cmd.rate; ! 2918: ptr->cmd_count = old_raw_cmd.cmd_count; ! 2919: ptr->track = old_raw_cmd.track; ! 2920: ptr->phys_length = 0; ! 2921: ptr->next = 0; ! 2922: ptr->buffer_length = 0; ! 2923: memcpy(ptr->cmd, old_raw_cmd.cmd, 9); ! 2924: param += sizeof(struct old_floppy_raw_cmd); ! 2925: if (ptr->cmd_count > 9) ! 2926: return -EINVAL; ! 2927: } else { ! 2928: COPYIN(*ptr); ! 2929: ptr->next = 0; ! 2930: ptr->buffer_length = 0; ! 2931: param += sizeof(struct floppy_raw_cmd); ! 2932: if (ptr->cmd_count > 16) ! 2933: return -EINVAL; ! 2934: } ! 2935: ! 2936: for (i=0; i< 16; i++) ! 2937: ptr->reply[i] = 0; ! 2938: ptr->resultcode = 0; ! 2939: ptr->kernel_data = 0; ! 2940: ! 2941: if (ptr->flags & (FD_RAW_READ | FD_RAW_WRITE)) { ! 2942: if (ptr->length <= 0) ! 2943: return -EINVAL; ! 2944: ptr->kernel_data =(char*)dma_mem_alloc(ptr->length); ! 2945: if (!ptr->kernel_data) ! 2946: return -ENOMEM; ! 2947: ptr->buffer_length = ptr->length; ! 2948: } ! 2949: if ( ptr->flags & FD_RAW_READ ) ! 2950: ECALL( verify_area( VERIFY_WRITE, ptr->data, ! 2951: ptr->length )); ! 2952: if (ptr->flags & FD_RAW_WRITE) ! 2953: ECALL(fd_copyin(ptr->data, ptr->kernel_data, ! 2954: ptr->length)); ! 2955: rcmd = & (ptr->next); ! 2956: if (!(ptr->flags & FD_RAW_MORE)) ! 2957: return 0; ! 2958: ptr->rate &= 0x43; ! 2959: } ! 2960: } ! 2961: ! 2962: ! 2963: static int raw_cmd_ioctl(int cmd, void *param) ! 2964: { ! 2965: int drive, ret, ret2; ! 2966: struct floppy_raw_cmd *my_raw_cmd; ! 2967: ! 2968: if (FDCS->rawcmd <= 1) ! 2969: FDCS->rawcmd = 1; ! 2970: for (drive= 0; drive < N_DRIVE; drive++){ ! 2971: if (FDC(drive) != fdc) ! 2972: continue; ! 2973: if (drive == current_drive){ ! 2974: if (UDRS->fd_ref > 1){ ! 2975: FDCS->rawcmd = 2; ! 2976: break; ! 2977: } ! 2978: } else if (UDRS->fd_ref){ ! 2979: FDCS->rawcmd = 2; ! 2980: break; ! 2981: } ! 2982: } ! 2983: ! 2984: if (FDCS->reset) ! 2985: return -EIO; ! 2986: ! 2987: ret = raw_cmd_copyin(cmd, param, &my_raw_cmd); ! 2988: if (ret) { ! 2989: raw_cmd_free(&my_raw_cmd); ! 2990: return ret; ! 2991: } ! 2992: ! 2993: raw_cmd = my_raw_cmd; ! 2994: cont = &raw_cmd_cont; ! 2995: ret=wait_til_done(floppy_start,1); ! 2996: #ifdef DCL_DEBUG ! 2997: if (DP->flags & FD_DEBUG){ ! 2998: DPRINT("calling disk change from raw_cmd ioctl\n"); ! 2999: } ! 3000: #endif ! 3001: ! 3002: if (ret != -EINTR && FDCS->reset) ! 3003: ret = -EIO; ! 3004: ! 3005: DRS->track = NO_TRACK; ! 3006: ! 3007: ret2 = raw_cmd_copyout(cmd, param, my_raw_cmd); ! 3008: if (!ret) ! 3009: ret = ret2; ! 3010: raw_cmd_free(&my_raw_cmd); ! 3011: return ret; ! 3012: } ! 3013: ! 3014: static int invalidate_drive(kdev_t rdev) ! 3015: { ! 3016: /* invalidate the buffer track to force a reread */ ! 3017: set_bit(DRIVE(rdev), &fake_change); ! 3018: process_fd_request(); ! 3019: check_disk_change(rdev); ! 3020: return 0; ! 3021: } ! 3022: ! 3023: ! 3024: static inline void clear_write_error(int drive) ! 3025: { ! 3026: CLEARSTRUCT(UDRWE); ! 3027: } ! 3028: ! 3029: static inline int set_geometry(unsigned int cmd, struct floppy_struct *g, ! 3030: int drive, int type, kdev_t device) ! 3031: { ! 3032: int cnt; ! 3033: ! 3034: /* sanity checking for parameters.*/ ! 3035: if (g->sect <= 0 || ! 3036: g->head <= 0 || ! 3037: g->track <= 0 || ! 3038: g->track > UDP->tracks>>STRETCH(g) || ! 3039: /* check if reserved bits are set */ ! 3040: (g->stretch&~(FD_STRETCH|FD_SWAPSIDES)) != 0) ! 3041: return -EINVAL; ! 3042: if (type){ ! 3043: if (!suser()) ! 3044: return -EPERM; ! 3045: LOCK_FDC(drive,1); ! 3046: for (cnt = 0; cnt < N_DRIVE; cnt++){ ! 3047: if (ITYPE(drive_state[cnt].fd_device) == type && ! 3048: drive_state[cnt].fd_ref) ! 3049: set_bit(drive, &fake_change); ! 3050: } ! 3051: floppy_type[type] = *g; ! 3052: floppy_type[type].name="user format"; ! 3053: for (cnt = type << 2; cnt < (type << 2) + 4; cnt++) ! 3054: floppy_sizes[cnt]= floppy_sizes[cnt+0x80]= ! 3055: floppy_type[type].size>>1; ! 3056: process_fd_request(); ! 3057: for (cnt = 0; cnt < N_DRIVE; cnt++){ ! 3058: if (ITYPE(drive_state[cnt].fd_device) == type && ! 3059: drive_state[cnt].fd_ref) ! 3060: check_disk_change( ! 3061: MKDEV(FLOPPY_MAJOR, ! 3062: drive_state[cnt].fd_device)); ! 3063: } ! 3064: } else { ! 3065: LOCK_FDC(drive,1); ! 3066: if (cmd != FDDEFPRM) ! 3067: /* notice a disk change immediately, else ! 3068: * we loose our settings immediately*/ ! 3069: CALL(poll_drive(1,0)); ! 3070: user_params[drive] = *g; ! 3071: if (buffer_drive == drive) ! 3072: SUPBOUND(buffer_max, user_params[drive].sect); ! 3073: current_type[drive] = &user_params[drive]; ! 3074: floppy_sizes[drive] = user_params[drive].size >> 1; ! 3075: if (cmd == FDDEFPRM) ! 3076: DRS->keep_data = -1; ! 3077: else ! 3078: DRS->keep_data = 1; ! 3079: /* invalidation. Invalidate only when needed, i.e. ! 3080: * when there are already sectors in the buffer cache ! 3081: * whose number will change. This is useful, because ! 3082: * mtools often changes the geometry of the disk after ! 3083: * looking at the boot block */ ! 3084: if (DRS->maxblock > user_params[drive].sect || DRS->maxtrack) ! 3085: invalidate_drive(device); ! 3086: else ! 3087: process_fd_request(); ! 3088: } ! 3089: return 0; ! 3090: } ! 3091: ! 3092: /* handle obsolete ioctl's */ ! 3093: static struct translation_entry { ! 3094: int newcmd; ! 3095: int oldcmd; ! 3096: int oldsize; /* size of 0x00xx-style ioctl. Reflects old structures, thus ! 3097: * use numeric values. NO SIZEOFS */ ! 3098: } translation_table[]= { ! 3099: {FDCLRPRM, 0, 0}, ! 3100: {FDSETPRM, 1, 28}, ! 3101: {FDDEFPRM, 2, 28}, ! 3102: {FDGETPRM, 3, 28}, ! 3103: {FDMSGON, 4, 0}, ! 3104: {FDMSGOFF, 5, 0}, ! 3105: {FDFMTBEG, 6, 0}, ! 3106: {FDFMTTRK, 7, 12}, ! 3107: {FDFMTEND, 8, 0}, ! 3108: {FDSETEMSGTRESH, 10, 0}, ! 3109: {FDFLUSH, 11, 0}, ! 3110: {FDSETMAXERRS, 12, 20}, ! 3111: {OLDFDRAWCMD, 30, 0}, ! 3112: {FDGETMAXERRS, 14, 20}, ! 3113: {FDGETDRVTYP, 16, 16}, ! 3114: {FDSETDRVPRM, 20, 88}, ! 3115: {FDGETDRVPRM, 21, 88}, ! 3116: {FDGETDRVSTAT, 22, 52}, ! 3117: {FDPOLLDRVSTAT, 23, 52}, ! 3118: {FDRESET, 24, 0}, ! 3119: {FDGETFDCSTAT, 25, 40}, ! 3120: {FDWERRORCLR, 27, 0}, ! 3121: {FDWERRORGET, 28, 24}, ! 3122: {FDRAWCMD, 0, 0}, ! 3123: {FDTWADDLE, 40, 0} }; ! 3124: ! 3125: static inline int normalize_0x02xx_ioctl(int *cmd, int *size) ! 3126: { ! 3127: int i; ! 3128: ! 3129: for (i=0; i < ARRAY_SIZE(translation_table); i++) { ! 3130: if ((*cmd & 0xffff) == (translation_table[i].newcmd & 0xffff)){ ! 3131: *size = _IOC_SIZE(*cmd); ! 3132: *cmd = translation_table[i].newcmd; ! 3133: if (*size > _IOC_SIZE(*cmd)) { ! 3134: printk("ioctl not yet supported\n"); ! 3135: return -EFAULT; ! 3136: } ! 3137: return 0; ! 3138: } ! 3139: } ! 3140: return -EINVAL; ! 3141: } ! 3142: ! 3143: static inline int xlate_0x00xx_ioctl(int *cmd, int *size) ! 3144: { ! 3145: int i; ! 3146: /* old ioctls' for kernels <= 1.3.33 */ ! 3147: /* When the next even release will come around, we'll start ! 3148: * warning against these. ! 3149: * When the next odd release will come around, we'll fail with ! 3150: * -EINVAL */ ! 3151: if(strcmp(system_utsname.version, "1.4.0") >= 0) ! 3152: printk("obsolete floppy ioctl %x\n", *cmd); ! 3153: if((system_utsname.version[0] == '1' && ! 3154: strcmp(system_utsname.version, "1.5.0") >= 0) || ! 3155: (system_utsname.version[0] >= '2' && ! 3156: strcmp(system_utsname.version, "2.1.0") >= 0)) ! 3157: return -EINVAL; ! 3158: for (i=0; i < ARRAY_SIZE(translation_table); i++) { ! 3159: if (*cmd == translation_table[i].oldcmd) { ! 3160: *size = translation_table[i].oldsize; ! 3161: *cmd = translation_table[i].newcmd; ! 3162: return 0; ! 3163: } ! 3164: } ! 3165: return -EINVAL; ! 3166: } ! 3167: ! 3168: static int fd_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, ! 3169: unsigned long param) ! 3170: { ! 3171: #define IOCTL_MODE_BIT 8 ! 3172: #define OPEN_WRITE_BIT 16 ! 3173: #define IOCTL_ALLOWED (filp && (filp->f_mode & IOCTL_MODE_BIT)) ! 3174: #define OUT(c,x) case c: outparam = (const char *) (x); break ! 3175: #define IN(c,x,tag) case c: *(x) = inparam. tag ; return 0 ! 3176: ! 3177: int i,drive,type; ! 3178: kdev_t device; ! 3179: int ret; ! 3180: int size; ! 3181: union inparam { ! 3182: struct floppy_struct g; /* geometry */ ! 3183: struct format_descr f; ! 3184: struct floppy_max_errors max_errors; ! 3185: struct floppy_drive_params dp; ! 3186: } inparam; /* parameters coming from user space */ ! 3187: const char *outparam; /* parameters passed back to user space */ ! 3188: ! 3189: device = inode->i_rdev; ! 3190: switch (cmd) { ! 3191: RO_IOCTLS(device,param); ! 3192: } ! 3193: type = TYPE(device); ! 3194: drive = DRIVE(device); ! 3195: ! 3196: /* convert the old style command into a new style command */ ! 3197: if ((cmd & 0xff00) == 0x0200) { ! 3198: ECALL(normalize_0x02xx_ioctl(&cmd, &size)); ! 3199: } else if ((cmd & 0xff00) == 0x0000) { ! 3200: ECALL(xlate_0x00xx_ioctl(&cmd, &size)); ! 3201: } else ! 3202: return -EINVAL; ! 3203: ! 3204: /* permission checks */ ! 3205: if (((cmd & 0x80) && !suser()) || ! 3206: ((cmd & 0x40) && !IOCTL_ALLOWED)) ! 3207: return -EPERM; ! 3208: ! 3209: /* verify writability of result, and fail early */ ! 3210: if (_IOC_DIR(cmd) & _IOC_READ) ! 3211: ECALL(verify_area(VERIFY_WRITE,(void *) param, size)); ! 3212: ! 3213: /* copyin */ ! 3214: CLEARSTRUCT(&inparam); ! 3215: if (_IOC_DIR(cmd) & _IOC_WRITE) ! 3216: ECALL(fd_copyin((void *)param, &inparam, size)) ! 3217: ! 3218: switch (cmd) { ! 3219: case FDCLRPRM: ! 3220: LOCK_FDC(drive,1); ! 3221: current_type[drive] = NULL; ! 3222: floppy_sizes[drive] = MAX_DISK_SIZE; ! 3223: UDRS->keep_data = 0; ! 3224: return invalidate_drive(device); ! 3225: case FDSETPRM: ! 3226: case FDDEFPRM: ! 3227: return set_geometry(cmd, & inparam.g, ! 3228: drive, type, device); ! 3229: case FDGETPRM: ! 3230: if (type) ! 3231: outparam = (char *) &floppy_type[type]; ! 3232: else ! 3233: outparam = (char *) current_type[drive]; ! 3234: if(!outparam) ! 3235: return -ENODEV; ! 3236: break; ! 3237: ! 3238: case FDMSGON: ! 3239: UDP->flags |= FTD_MSG; ! 3240: return 0; ! 3241: case FDMSGOFF: ! 3242: UDP->flags &= ~FTD_MSG; ! 3243: return 0; ! 3244: ! 3245: case FDFMTBEG: ! 3246: LOCK_FDC(drive,1); ! 3247: CALL(poll_drive(1, FD_RAW_NEED_DISK)); ! 3248: ret = UDRS->flags; ! 3249: process_fd_request(); ! 3250: if(ret & FD_VERIFY) ! 3251: return -ENODEV; ! 3252: if(!(ret & FD_DISK_WRITABLE)) ! 3253: return -EROFS; ! 3254: return 0; ! 3255: case FDFMTTRK: ! 3256: if (UDRS->fd_ref != 1) ! 3257: return -EBUSY; ! 3258: return do_format(device, &inparam.f); ! 3259: case FDFMTEND: ! 3260: case FDFLUSH: ! 3261: LOCK_FDC(drive,1); ! 3262: return invalidate_drive(device); ! 3263: ! 3264: case FDSETEMSGTRESH: ! 3265: UDP->max_errors.reporting = ! 3266: (unsigned short) (param & 0x0f); ! 3267: return 0; ! 3268: OUT(FDGETMAXERRS, &UDP->max_errors); ! 3269: IN(FDSETMAXERRS, &UDP->max_errors, max_errors); ! 3270: ! 3271: case FDGETDRVTYP: ! 3272: outparam = drive_name(type,drive); ! 3273: SUPBOUND(size,strlen(outparam)+1); ! 3274: break; ! 3275: ! 3276: IN(FDSETDRVPRM, UDP, dp); ! 3277: OUT(FDGETDRVPRM, UDP); ! 3278: ! 3279: case FDPOLLDRVSTAT: ! 3280: LOCK_FDC(drive,1); ! 3281: CALL(poll_drive(1, FD_RAW_NEED_DISK)); ! 3282: process_fd_request(); ! 3283: /* fall through */ ! 3284: OUT(FDGETDRVSTAT, UDRS); ! 3285: ! 3286: case FDRESET: ! 3287: return user_reset_fdc(drive, (int)param, 1); ! 3288: ! 3289: OUT(FDGETFDCSTAT,UFDCS); ! 3290: ! 3291: case FDWERRORCLR: ! 3292: CLEARSTRUCT(UDRWE); ! 3293: return 0; ! 3294: OUT(FDWERRORGET,UDRWE); ! 3295: ! 3296: case OLDFDRAWCMD: ! 3297: case FDRAWCMD: ! 3298: if (type) ! 3299: return -EINVAL; ! 3300: LOCK_FDC(drive,1); ! 3301: set_floppy(device); ! 3302: CALL(i = raw_cmd_ioctl(cmd,(void *) param)); ! 3303: process_fd_request(); ! 3304: return i; ! 3305: ! 3306: case FDTWADDLE: ! 3307: LOCK_FDC(drive,1); ! 3308: twaddle(); ! 3309: process_fd_request(); ! 3310: return 0; ! 3311: ! 3312: default: ! 3313: return -EINVAL; ! 3314: } ! 3315: ! 3316: if (_IOC_DIR(cmd) & _IOC_READ) ! 3317: return fd_copyout((void *)param, outparam, size); ! 3318: else ! 3319: return 0; ! 3320: #undef IOCTL_ALLOWED ! 3321: #undef OUT ! 3322: #undef IN ! 3323: } ! 3324: ! 3325: static void config_types(void) ! 3326: { ! 3327: int first=1; ! 3328: int drive; ! 3329: ! 3330: /* read drive info out of physical cmos */ ! 3331: drive=0; ! 3332: if (!UDP->cmos) ! 3333: UDP->cmos= FLOPPY0_TYPE; ! 3334: drive=1; ! 3335: if (!UDP->cmos && FLOPPY1_TYPE) ! 3336: UDP->cmos = FLOPPY1_TYPE; ! 3337: ! 3338: /* XXX */ ! 3339: /* additional physical CMOS drive detection should go here */ ! 3340: ! 3341: for (drive=0; drive < N_DRIVE; drive++){ ! 3342: if (UDP->cmos >= 0 && UDP->cmos <= NUMBER(default_drive_params)) ! 3343: memcpy((char *) UDP, ! 3344: (char *) (&default_drive_params[(int)UDP->cmos].params), ! 3345: sizeof(struct floppy_drive_params)); ! 3346: if (UDP->cmos){ ! 3347: if (first) ! 3348: printk("Floppy drive(s): "); ! 3349: else ! 3350: printk(", "); ! 3351: first=0; ! 3352: if (UDP->cmos > 0){ ! 3353: allowed_drive_mask |= 1 << drive; ! 3354: printk("fd%d is %s", drive, ! 3355: default_drive_params[(int)UDP->cmos].name); ! 3356: } else ! 3357: printk("fd%d is unknown type %d",drive, ! 3358: UDP->cmos); ! 3359: } ! 3360: } ! 3361: if (!first) ! 3362: printk("\n"); ! 3363: } ! 3364: ! 3365: static int floppy_read(struct inode * inode, struct file * filp, ! 3366: char * buf, int count) ! 3367: { ! 3368: int drive = DRIVE(inode->i_rdev); ! 3369: ! 3370: check_disk_change(inode->i_rdev); ! 3371: if (UTESTF(FD_DISK_CHANGED)) ! 3372: return -ENXIO; ! 3373: return block_read(inode, filp, buf, count); ! 3374: } ! 3375: ! 3376: static int floppy_write(struct inode * inode, struct file * filp, ! 3377: const char * buf, int count) ! 3378: { ! 3379: int block; ! 3380: int ret; ! 3381: int drive = DRIVE(inode->i_rdev); ! 3382: ! 3383: if (!UDRS->maxblock) ! 3384: UDRS->maxblock=1;/* make change detectable */ ! 3385: check_disk_change(inode->i_rdev); ! 3386: if (UTESTF(FD_DISK_CHANGED)) ! 3387: return -ENXIO; ! 3388: if (!UTESTF(FD_DISK_WRITABLE)) ! 3389: return -EROFS; ! 3390: block = (filp->f_pos + count) >> 9; ! 3391: INFBOUND(UDRS->maxblock, block); ! 3392: ret= block_write(inode, filp, buf, count); ! 3393: return ret; ! 3394: } ! 3395: ! 3396: static void floppy_release(struct inode * inode, struct file * filp) ! 3397: { ! 3398: int drive; ! 3399: ! 3400: drive = DRIVE(inode->i_rdev); ! 3401: ! 3402: if (!filp || (filp->f_mode & (2 | OPEN_WRITE_BIT))) ! 3403: /* if the file is mounted OR (writable now AND writable at ! 3404: * open time) Linus: Does this cover all cases? */ ! 3405: block_fsync(inode,filp); ! 3406: ! 3407: if (UDRS->fd_ref < 0) ! 3408: UDRS->fd_ref=0; ! 3409: else if (!UDRS->fd_ref--) { ! 3410: DPRINT("floppy_release with fd_ref == 0"); ! 3411: UDRS->fd_ref = 0; ! 3412: } ! 3413: floppy_release_irq_and_dma(); ! 3414: } ! 3415: ! 3416: /* ! 3417: * floppy_open check for aliasing (/dev/fd0 can be the same as ! 3418: * /dev/PS0 etc), and disallows simultaneous access to the same ! 3419: * drive with different device numbers. ! 3420: */ ! 3421: #define RETERR(x) do{floppy_release(inode,filp); return -(x);}while(0) ! 3422: ! 3423: static int floppy_open(struct inode * inode, struct file * filp) ! 3424: { ! 3425: int drive; ! 3426: int old_dev; ! 3427: int try; ! 3428: char *tmp; ! 3429: ! 3430: if (!filp) { ! 3431: DPRINT("Weird, open called with filp=0\n"); ! 3432: return -EIO; ! 3433: } ! 3434: ! 3435: drive = DRIVE(inode->i_rdev); ! 3436: if (drive >= N_DRIVE || ! 3437: !(allowed_drive_mask & (1 << drive)) || ! 3438: fdc_state[FDC(drive)].version == FDC_NONE) ! 3439: return -ENXIO; ! 3440: ! 3441: if (TYPE(inode->i_rdev) >= NUMBER(floppy_type)) ! 3442: return -ENXIO; ! 3443: old_dev = UDRS->fd_device; ! 3444: if (UDRS->fd_ref && old_dev != MINOR(inode->i_rdev)) ! 3445: return -EBUSY; ! 3446: ! 3447: if (!UDRS->fd_ref && (UDP->flags & FD_BROKEN_DCL)){ ! 3448: USETF(FD_DISK_CHANGED); ! 3449: USETF(FD_VERIFY); ! 3450: } ! 3451: ! 3452: if (UDRS->fd_ref == -1 || ! 3453: (UDRS->fd_ref && (filp->f_flags & O_EXCL))) ! 3454: return -EBUSY; ! 3455: ! 3456: if (floppy_grab_irq_and_dma()) ! 3457: return -EBUSY; ! 3458: ! 3459: if (filp->f_flags & O_EXCL) ! 3460: UDRS->fd_ref = -1; ! 3461: else ! 3462: UDRS->fd_ref++; ! 3463: ! 3464: if (!floppy_track_buffer){ ! 3465: /* if opening an ED drive, reserve a big buffer, ! 3466: * else reserve a small one */ ! 3467: if ((UDP->cmos == 6) || (UDP->cmos == 5)) ! 3468: try = 64; /* Only 48 actually useful */ ! 3469: else ! 3470: try = 32; /* Only 24 actually useful */ ! 3471: ! 3472: tmp=(char *)dma_mem_alloc(1024 * try); ! 3473: if (!tmp) { ! 3474: try >>= 1; /* buffer only one side */ ! 3475: INFBOUND(try, 16); ! 3476: tmp= (char *)dma_mem_alloc(1024*try); ! 3477: } ! 3478: if (!tmp) { ! 3479: DPRINT("Unable to allocate DMA memory\n"); ! 3480: RETERR(ENXIO); ! 3481: } ! 3482: if (floppy_track_buffer){ ! 3483: free_pages((unsigned long)tmp,__get_order(try*1024)); ! 3484: }else { ! 3485: buffer_min = buffer_max = -1; ! 3486: floppy_track_buffer = tmp; ! 3487: max_buffer_sectors = try; ! 3488: } ! 3489: } ! 3490: ! 3491: UDRS->fd_device = MINOR(inode->i_rdev); ! 3492: if (old_dev != -1 && old_dev != MINOR(inode->i_rdev)) { ! 3493: if (buffer_drive == drive) ! 3494: buffer_track = -1; ! 3495: invalidate_buffers(MKDEV(FLOPPY_MAJOR,old_dev)); ! 3496: } ! 3497: ! 3498: /* Allow ioctls if we have write-permissions even if read-only open */ ! 3499: if ((filp->f_mode & 2) || (permission(inode,2) == 0)) ! 3500: filp->f_mode |= IOCTL_MODE_BIT; ! 3501: if (filp->f_mode & 2) ! 3502: filp->f_mode |= OPEN_WRITE_BIT; ! 3503: ! 3504: if (UFDCS->rawcmd == 1) ! 3505: UFDCS->rawcmd = 2; ! 3506: ! 3507: if (filp->f_flags & O_NDELAY) ! 3508: return 0; ! 3509: if (filp->f_mode & 3) { ! 3510: UDRS->last_checked = 0; ! 3511: check_disk_change(inode->i_rdev); ! 3512: if (UTESTF(FD_DISK_CHANGED)) ! 3513: RETERR(ENXIO); ! 3514: } ! 3515: if ((filp->f_mode & 2) && !(UTESTF(FD_DISK_WRITABLE))) ! 3516: RETERR(EROFS); ! 3517: return 0; ! 3518: #undef RETERR ! 3519: } ! 3520: ! 3521: /* ! 3522: * Check if the disk has been changed or if a change has been faked. ! 3523: */ ! 3524: static int check_floppy_change(kdev_t dev) ! 3525: { ! 3526: int drive = DRIVE(dev); ! 3527: ! 3528: if (MAJOR(dev) != MAJOR_NR) { ! 3529: DPRINT("floppy_changed: not a floppy\n"); ! 3530: return 0; ! 3531: } ! 3532: ! 3533: if (UTESTF(FD_DISK_CHANGED) || UTESTF(FD_VERIFY)) ! 3534: return 1; ! 3535: ! 3536: if (UDRS->last_checked + UDP->checkfreq < jiffies){ ! 3537: lock_fdc(drive,0); ! 3538: poll_drive(0,0); ! 3539: process_fd_request(); ! 3540: } ! 3541: ! 3542: if (UTESTF(FD_DISK_CHANGED) || ! 3543: UTESTF(FD_VERIFY) || ! 3544: test_bit(drive, &fake_change) || ! 3545: (!TYPE(dev) && !current_type[drive])) ! 3546: return 1; ! 3547: return 0; ! 3548: } ! 3549: ! 3550: /* revalidate the floppy disk, i.e. trigger format autodetection by reading ! 3551: * the bootblock (block 0). "Autodetection" is also needed to check whether ! 3552: * there is a disk in the drive at all... Thus we also do it for fixed ! 3553: * geometry formats */ ! 3554: static int floppy_revalidate(kdev_t dev) ! 3555: { ! 3556: #define NO_GEOM (!current_type[drive] && !TYPE(dev)) ! 3557: struct buffer_head * bh; ! 3558: int drive=DRIVE(dev); ! 3559: int cf; ! 3560: ! 3561: if (UTESTF(FD_DISK_CHANGED) || ! 3562: UTESTF(FD_VERIFY) || ! 3563: test_bit(drive, &fake_change) || ! 3564: NO_GEOM){ ! 3565: lock_fdc(drive,0); ! 3566: cf = UTESTF(FD_DISK_CHANGED) || UTESTF(FD_VERIFY); ! 3567: if (!(cf || test_bit(drive, &fake_change) || NO_GEOM)){ ! 3568: process_fd_request(); /*already done by another thread*/ ! 3569: return 0; ! 3570: } ! 3571: UDRS->maxblock = 0; ! 3572: UDRS->maxtrack = 0; ! 3573: if (buffer_drive == drive) ! 3574: buffer_track = -1; ! 3575: clear_bit(drive, &fake_change); ! 3576: UCLEARF(FD_DISK_CHANGED); ! 3577: if (cf) ! 3578: UDRS->generation++; ! 3579: if (NO_GEOM){ ! 3580: /* auto-sensing */ ! 3581: int size = floppy_blocksizes[MINOR(dev)]; ! 3582: if (!size) ! 3583: size = 1024; ! 3584: if (!(bh = getblk(dev,0,size))){ ! 3585: process_fd_request(); ! 3586: return 1; ! 3587: } ! 3588: if (bh && !buffer_uptodate(bh)) ! 3589: ll_rw_block(READ, 1, &bh); ! 3590: process_fd_request(); ! 3591: wait_on_buffer(bh); ! 3592: brelse(bh); ! 3593: return 0; ! 3594: } ! 3595: if (cf) ! 3596: poll_drive(0, FD_RAW_NEED_DISK); ! 3597: process_fd_request(); ! 3598: } ! 3599: return 0; ! 3600: } ! 3601: ! 3602: static struct file_operations floppy_fops = { ! 3603: NULL, /* lseek - default */ ! 3604: floppy_read, /* read - general block-dev read */ ! 3605: floppy_write, /* write - general block-dev write */ ! 3606: NULL, /* readdir - bad */ ! 3607: NULL, /* select */ ! 3608: fd_ioctl, /* ioctl */ ! 3609: NULL, /* mmap */ ! 3610: floppy_open, /* open */ ! 3611: floppy_release, /* release */ ! 3612: block_fsync, /* fsync */ ! 3613: NULL, /* fasync */ ! 3614: check_floppy_change, /* media_change */ ! 3615: floppy_revalidate, /* revalidate */ ! 3616: }; ! 3617: ! 3618: /* ! 3619: * Floppy Driver initialisation ! 3620: * ============================= ! 3621: */ ! 3622: ! 3623: /* Determine the floppy disk controller type */ ! 3624: /* This routine was written by David C. Niemi */ ! 3625: static char get_fdc_version(void) ! 3626: { ! 3627: int r; ! 3628: ! 3629: output_byte(FD_DUMPREGS); /* 82072 and better know DUMPREGS */ ! 3630: if (FDCS->reset) ! 3631: return FDC_NONE; ! 3632: if ((r = result()) <= 0x00) ! 3633: return FDC_NONE; /* No FDC present ??? */ ! 3634: if ((r==1) && (reply_buffer[0] == 0x80)){ ! 3635: printk("FDC %d is a 8272A\n",fdc); ! 3636: return FDC_8272A; /* 8272a/765 don't know DUMPREGS */ ! 3637: } ! 3638: if (r != 10) { ! 3639: printk("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n", ! 3640: fdc, r); ! 3641: return FDC_UNKNOWN; ! 3642: } ! 3643: output_byte(FD_VERSION); ! 3644: r = result(); ! 3645: if ((r == 1) && (reply_buffer[0] == 0x80)){ ! 3646: printk("FDC %d is a 82072\n",fdc); ! 3647: return FDC_82072; /* 82072 doesn't know VERSION */ ! 3648: } ! 3649: if ((r != 1) || (reply_buffer[0] != 0x90)) { ! 3650: printk("FDC %d init: VERSION: unexpected return of %d bytes.\n", ! 3651: fdc, r); ! 3652: return FDC_UNKNOWN; ! 3653: } ! 3654: output_byte(FD_UNLOCK); ! 3655: r = result(); ! 3656: if ((r == 1) && (reply_buffer[0] == 0x80)){ ! 3657: printk("FDC %d is a pre-1991 82077\n", fdc); ! 3658: return FDC_82077_ORIG; /* Pre-1991 82077 doesn't know LOCK/UNLOCK */ ! 3659: } ! 3660: if ((r != 1) || (reply_buffer[0] != 0x00)) { ! 3661: printk("FDC %d init: UNLOCK: unexpected return of %d bytes.\n", ! 3662: fdc, r); ! 3663: return FDC_UNKNOWN; ! 3664: } ! 3665: output_byte(FD_PARTID); ! 3666: r = result(); ! 3667: if (r != 1) { ! 3668: printk("FDC %d init: PARTID: unexpected return of %d bytes.\n", ! 3669: fdc, r); ! 3670: return FDC_UNKNOWN; ! 3671: } ! 3672: if (reply_buffer[0] == 0x80) { ! 3673: printk("FDC %d is a post-1991 82077\n",fdc); ! 3674: return FDC_82077; /* Revised 82077AA passes all the tests */ ! 3675: } ! 3676: switch (reply_buffer[0] >> 5) { ! 3677: case 0x0: ! 3678: output_byte(FD_SAVE); ! 3679: r = result(); ! 3680: if (r != 16) { ! 3681: printk("FDC %d init: SAVE: unexpected return of %d bytes.\n", fdc, r); ! 3682: return FDC_UNKNOWN; ! 3683: } ! 3684: if (!(reply_buffer[0] & 0x40)) { ! 3685: printk("FDC %d is a 3Volt 82078SL.\n",fdc); ! 3686: return FDC_82078; ! 3687: } ! 3688: /* Either a 82078-1 or a 82078SL running at 5Volt */ ! 3689: printk("FDC %d is a 82078-1.\n",fdc); ! 3690: return FDC_82078_1; ! 3691: case 0x1: ! 3692: printk("FDC %d is a 44pin 82078\n",fdc); ! 3693: return FDC_82078; ! 3694: case 0x2: ! 3695: printk("FDC %d is a S82078B\n", fdc); ! 3696: return FDC_S82078B; ! 3697: case 0x3: ! 3698: printk("FDC %d is a National Semiconductor PC87306\n", fdc); ! 3699: return FDC_87306; ! 3700: default: ! 3701: printk("FDC %d init: 82077 variant with PARTID=%d.\n", ! 3702: fdc, reply_buffer[0] >> 5); ! 3703: return FDC_82077_UNKN; ! 3704: } ! 3705: } /* get_fdc_version */ ! 3706: ! 3707: /* lilo configuration */ ! 3708: ! 3709: /* we make the invert_dcl function global. One day, somebody might ! 3710: * want to centralize all thinkpad related options into one lilo option, ! 3711: * there are just so many thinkpad related quirks! */ ! 3712: void floppy_invert_dcl(int *ints,int param) ! 3713: { ! 3714: int i; ! 3715: ! 3716: for (i=0; i < ARRAY_SIZE(default_drive_params); i++){ ! 3717: if (param) ! 3718: default_drive_params[i].params.flags |= 0x80; ! 3719: else ! 3720: default_drive_params[i].params.flags &= ~0x80; ! 3721: } ! 3722: DPRINT("Configuring drives for inverted dcl\n"); ! 3723: } ! 3724: ! 3725: static void daring(int *ints,int param) ! 3726: { ! 3727: int i; ! 3728: ! 3729: for (i=0; i < ARRAY_SIZE(default_drive_params); i++){ ! 3730: if (param){ ! 3731: default_drive_params[i].params.select_delay = 0; ! 3732: default_drive_params[i].params.flags |= FD_SILENT_DCL_CLEAR; ! 3733: } else { ! 3734: default_drive_params[i].params.select_delay = 2*HZ/100; ! 3735: default_drive_params[i].params.flags &= ~FD_SILENT_DCL_CLEAR; ! 3736: } ! 3737: } ! 3738: DPRINT1("Assuming %s floppy hardware\n", param ? "standard" : "broken"); ! 3739: } ! 3740: ! 3741: static void allow_drives(int *ints, int param) ! 3742: { ! 3743: allowed_drive_mask=param; ! 3744: DPRINT1("setting allowed_drive_mask to 0x%x\n", param); ! 3745: } ! 3746: ! 3747: static void fdc2_adr(int *ints, int param) ! 3748: { ! 3749: FDC2 = param; ! 3750: if (param) ! 3751: DPRINT1("enabling second fdc at address 0x%3x\n", FDC2); ! 3752: else ! 3753: DPRINT("disabling second fdc\n"); ! 3754: } ! 3755: ! 3756: static void unex(int *ints,int param) ! 3757: { ! 3758: print_unex = param; ! 3759: DPRINT1("%sprinting messages for unexpected interrupts\n", ! 3760: param ? "" : "not "); ! 3761: } ! 3762: ! 3763: static void set_cmos(int *ints, int dummy) ! 3764: { ! 3765: int current_drive=0; ! 3766: ! 3767: if (ints[0] != 2){ ! 3768: DPRINT("wrong number of parameter for cmos\n"); ! 3769: return; ! 3770: } ! 3771: current_drive = ints[1]; ! 3772: if (current_drive < 0 || current_drive >= 8){ ! 3773: DPRINT("bad drive for set_cmos\n"); ! 3774: return; ! 3775: } ! 3776: if (current_drive >= 4 && !FDC2) ! 3777: fdc2_adr(0, 0x370); ! 3778: if (ints[2] <= 0 || ints[2] >= NUMBER(default_drive_params)){ ! 3779: DPRINT1("bad cmos code %d\n", ints[2]); ! 3780: return; ! 3781: } ! 3782: DP->cmos = ints[2]; ! 3783: DPRINT1("setting cmos code to %d\n", ints[2]); ! 3784: } ! 3785: ! 3786: static struct param_table { ! 3787: const char *name; ! 3788: void (*fn)(int *ints, int param); ! 3789: int def_param; ! 3790: } config_params[]={ ! 3791: { "allowed_drive_mask", allow_drives, 0xff }, ! 3792: { "all_drives", allow_drives, 0xff }, ! 3793: { "asus_pci", allow_drives, 0x33 }, ! 3794: ! 3795: { "daring", daring, 1}, ! 3796: ! 3797: { "two_fdc", fdc2_adr, 0x370 }, ! 3798: { "one_fdc", fdc2_adr, 0 }, ! 3799: ! 3800: { "thinkpad", floppy_invert_dcl, 1 }, ! 3801: ! 3802: { "cmos", set_cmos, 0 }, ! 3803: ! 3804: { "unexpected_interrupts", unex, 1 }, ! 3805: { "no_unexpected_interrupts", unex, 0 }, ! 3806: { "L40SX", unex, 0 } }; ! 3807: ! 3808: #define FLOPPY_SETUP ! 3809: void floppy_setup(char *str, int *ints) ! 3810: { ! 3811: int i; ! 3812: int param; ! 3813: if (str) ! 3814: for (i=0; i< ARRAY_SIZE(config_params); i++){ ! 3815: if (strcmp(str,config_params[i].name) == 0){ ! 3816: if (ints[0]) ! 3817: param = ints[1]; ! 3818: else ! 3819: param = config_params[i].def_param; ! 3820: config_params[i].fn(ints,param); ! 3821: return; ! 3822: } ! 3823: } ! 3824: if (str) { ! 3825: DPRINT1("unknown floppy option [%s]\n", str); ! 3826: ! 3827: DPRINT("allowed options are:"); ! 3828: for (i=0; i< ARRAY_SIZE(config_params); i++) ! 3829: printk(" %s",config_params[i].name); ! 3830: printk("\n"); ! 3831: } else ! 3832: DPRINT("botched floppy option\n"); ! 3833: DPRINT("Read linux/drivers/block/README.fd\n"); ! 3834: } ! 3835: ! 3836: int floppy_init(void) ! 3837: { ! 3838: int i,unit,drive; ! 3839: int have_no_fdc= -EIO; ! 3840: ! 3841: raw_cmd = 0; ! 3842: ! 3843: sti(); ! 3844: ! 3845: if (register_blkdev(MAJOR_NR,"fd",&floppy_fops)) { ! 3846: printk("Unable to get major %d for floppy\n",MAJOR_NR); ! 3847: return -EBUSY; ! 3848: } ! 3849: ! 3850: for (i=0; i<256; i++) ! 3851: if (ITYPE(i)) ! 3852: floppy_sizes[i] = floppy_type[ITYPE(i)].size >> 1; ! 3853: else ! 3854: floppy_sizes[i] = MAX_DISK_SIZE; ! 3855: ! 3856: blk_size[MAJOR_NR] = floppy_sizes; ! 3857: blksize_size[MAJOR_NR] = floppy_blocksizes; ! 3858: blk_dev[MAJOR_NR].request_fn = DEVICE_REQUEST; ! 3859: reschedule_timeout(MAXTIMEOUT, "floppy init", MAXTIMEOUT); ! 3860: config_types(); ! 3861: ! 3862: for (i = 0; i < N_FDC; i++) { ! 3863: fdc = i; ! 3864: CLEARSTRUCT(FDCS); ! 3865: FDCS->dtr = -1; ! 3866: FDCS->dor = 0x4; ! 3867: } ! 3868: ! 3869: fdc_state[0].address = FDC1; ! 3870: #if N_FDC > 1 ! 3871: fdc_state[1].address = FDC2; ! 3872: #endif ! 3873: ! 3874: if (floppy_grab_irq_and_dma()){ ! 3875: unregister_blkdev(MAJOR_NR,"fd"); ! 3876: return -EBUSY; ! 3877: } ! 3878: ! 3879: /* initialise drive state */ ! 3880: for (drive = 0; drive < N_DRIVE; drive++) { ! 3881: CLEARSTRUCT(UDRS); ! 3882: CLEARSTRUCT(UDRWE); ! 3883: UDRS->flags = FD_VERIFY | FD_DISK_NEWCHANGE | FD_DISK_CHANGED; ! 3884: UDRS->fd_device = -1; ! 3885: floppy_track_buffer = NULL; ! 3886: max_buffer_sectors = 0; ! 3887: } ! 3888: ! 3889: for (i = 0; i < N_FDC; i++) { ! 3890: fdc = i; ! 3891: FDCS->driver_version = FD_DRIVER_VERSION; ! 3892: for (unit=0; unit<4; unit++) ! 3893: FDCS->track[unit] = 0; ! 3894: if (FDCS->address == -1) ! 3895: continue; ! 3896: FDCS->rawcmd = 2; ! 3897: if (user_reset_fdc(-1,FD_RESET_ALWAYS,0)){ ! 3898: FDCS->address = -1; ! 3899: continue; ! 3900: } ! 3901: /* Try to determine the floppy controller type */ ! 3902: FDCS->version = get_fdc_version(); ! 3903: if (FDCS->version == FDC_NONE){ ! 3904: FDCS->address = -1; ! 3905: continue; ! 3906: } ! 3907: ! 3908: request_region(FDCS->address, 6, "floppy"); ! 3909: request_region(FDCS->address+7, 1, "floppy DIR"); ! 3910: /* address + 6 is reserved, and may be taken by IDE. ! 3911: * Unfortunately, Adaptec doesn't know this :-(, */ ! 3912: ! 3913: have_no_fdc = 0; ! 3914: /* Not all FDCs seem to be able to handle the version command ! 3915: * properly, so force a reset for the standard FDC clones, ! 3916: * to avoid interrupt garbage. ! 3917: */ ! 3918: FDCS->has_fifo = FDCS->version >= FDC_82077_ORIG; ! 3919: user_reset_fdc(-1,FD_RESET_ALWAYS,0); ! 3920: } ! 3921: fdc=0; ! 3922: del_timer(&fd_timeout); ! 3923: current_drive = 0; ! 3924: floppy_release_irq_and_dma(); ! 3925: initialising=0; ! 3926: if (have_no_fdc) { ! 3927: DPRINT("no floppy controllers found\n"); ! 3928: unregister_blkdev(MAJOR_NR,"fd"); ! 3929: } else ! 3930: virtual_dma_init(); ! 3931: return have_no_fdc; ! 3932: } ! 3933: ! 3934: static int floppy_grab_irq_and_dma(void) ! 3935: { ! 3936: int i; ! 3937: cli(); ! 3938: if (usage_count++){ ! 3939: sti(); ! 3940: return 0; ! 3941: } ! 3942: sti(); ! 3943: MOD_INC_USE_COUNT; ! 3944: for (i=0; i< N_FDC; i++){ ! 3945: if (FDCS->address != -1){ ! 3946: fdc = i; ! 3947: reset_fdc_info(1); ! 3948: fd_outb(FDCS->dor, FD_DOR); ! 3949: } ! 3950: } ! 3951: set_dor(0, ~0, 8); /* avoid immediate interrupt */ ! 3952: ! 3953: if (fd_request_irq()) { ! 3954: DPRINT1("Unable to grab IRQ%d for the floppy driver\n", ! 3955: FLOPPY_IRQ); ! 3956: return -1; ! 3957: } ! 3958: if (fd_request_dma()) { ! 3959: DPRINT1("Unable to grab DMA%d for the floppy driver\n", ! 3960: FLOPPY_DMA); ! 3961: fd_free_irq(); ! 3962: return -1; ! 3963: } ! 3964: for (fdc = 0; fdc < N_FDC; fdc++) ! 3965: if (FDCS->address != -1) ! 3966: fd_outb(FDCS->dor, FD_DOR); ! 3967: fdc = 0; ! 3968: fd_enable_irq(); ! 3969: return 0; ! 3970: } ! 3971: ! 3972: static void floppy_release_irq_and_dma(void) ! 3973: { ! 3974: #ifdef FLOPPY_SANITY_CHECK ! 3975: int drive; ! 3976: #endif ! 3977: long tmpsize; ! 3978: void *tmpaddr; ! 3979: ! 3980: cli(); ! 3981: if (--usage_count){ ! 3982: sti(); ! 3983: return; ! 3984: } ! 3985: sti(); ! 3986: MOD_DEC_USE_COUNT; ! 3987: fd_disable_dma(); ! 3988: fd_free_dma(); ! 3989: fd_disable_irq(); ! 3990: fd_free_irq(); ! 3991: ! 3992: set_dor(0, ~0, 8); ! 3993: #if N_FDC > 1 ! 3994: set_dor(1, ~8, 0); ! 3995: #endif ! 3996: floppy_enable_hlt(); ! 3997: ! 3998: if (floppy_track_buffer && max_buffer_sectors) { ! 3999: tmpsize = max_buffer_sectors*1024; ! 4000: tmpaddr = (void *)floppy_track_buffer; ! 4001: floppy_track_buffer = 0; ! 4002: max_buffer_sectors = 0; ! 4003: buffer_min = buffer_max = -1; ! 4004: free_pages((unsigned long)tmpaddr, __get_order(tmpsize)); ! 4005: } ! 4006: ! 4007: #ifdef FLOPPY_SANITY_CHECK ! 4008: for (drive=0; drive < N_FDC * 4; drive++) ! 4009: if (motor_off_timer[drive].next) ! 4010: printk("motor off timer %d still active\n", drive); ! 4011: ! 4012: if (fd_timeout.next) ! 4013: printk("floppy timer still active:%s\n", timeout_message); ! 4014: if (fd_timer.next) ! 4015: printk("auxiliary floppy timer still active\n"); ! 4016: if (floppy_tq.sync) ! 4017: printk("task queue still active\n"); ! 4018: #endif ! 4019: } ! 4020: ! 4021: ! 4022: #ifdef MODULE ! 4023: ! 4024: extern char *get_options(char *str, int *ints); ! 4025: ! 4026: static void mod_setup(char *pattern, void (*setup)(char *, int *)) ! 4027: { ! 4028: int i; ! 4029: char c; ! 4030: int j; ! 4031: int match; ! 4032: char buffer[100]; ! 4033: int ints[11]; ! 4034: int length = strlen(pattern)+1; ! 4035: ! 4036: match=0; ! 4037: j=1; ! 4038: ! 4039: for (i=current->mm->env_start; i< current->mm->env_end; i ++){ ! 4040: c= get_fs_byte(i); ! 4041: if (match){ ! 4042: if (j==99) ! 4043: c='\0'; ! 4044: buffer[j] = c; ! 4045: if (!c || c == ' ' || c == '\t'){ ! 4046: if (j){ ! 4047: buffer[j] = '\0'; ! 4048: setup(get_options(buffer,ints),ints); ! 4049: } ! 4050: j=0; ! 4051: } else ! 4052: j++; ! 4053: if (!c) ! 4054: break; ! 4055: continue; ! 4056: } ! 4057: if ((!j && !c) || (j && c == pattern[j-1])) ! 4058: j++; ! 4059: else ! 4060: j=0; ! 4061: if (j==length){ ! 4062: match=1; ! 4063: j=0; ! 4064: } ! 4065: } ! 4066: } ! 4067: ! 4068: ! 4069: #ifdef __cplusplus ! 4070: extern "C" { ! 4071: #endif ! 4072: int init_module(void) ! 4073: { ! 4074: printk("inserting floppy driver for %s\n", kernel_version); ! 4075: ! 4076: mod_setup("floppy=", floppy_setup); ! 4077: ! 4078: return floppy_init(); ! 4079: } ! 4080: ! 4081: void cleanup_module(void) ! 4082: { ! 4083: int fdc; ! 4084: ! 4085: for (fdc=0; fdc<2; fdc++) ! 4086: if (FDCS->address != -1){ ! 4087: release_region(FDCS->address, 6); ! 4088: release_region(FDCS->address+7, 1); ! 4089: } ! 4090: ! 4091: unregister_blkdev(MAJOR_NR, "fd"); ! 4092: ! 4093: blk_dev[MAJOR_NR].request_fn = 0; ! 4094: } ! 4095: ! 4096: #ifdef __cplusplus ! 4097: } ! 4098: #endif ! 4099: ! 4100: #endif
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