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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: * modeled 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 dependent ! 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: static int irqdma_allocated = 0; ! 123: ! 124: #include <linux/sched.h> ! 125: #include <linux/fs.h> ! 126: #include <linux/kernel.h> ! 127: #include <linux/timer.h> ! 128: #include <linux/tqueue.h> ! 129: #define FDPATCHES ! 130: #include <linux/fdreg.h> ! 131: ! 132: ! 133: #include <linux/fd.h> ! 134: ! 135: ! 136: #define OLDFDRAWCMD 0x020d /* send a raw command to the FDC */ ! 137: ! 138: struct old_floppy_raw_cmd { ! 139: void *data; ! 140: long length; ! 141: ! 142: unsigned char rate; ! 143: unsigned char flags; ! 144: unsigned char cmd_count; ! 145: unsigned char cmd[9]; ! 146: unsigned char reply_count; ! 147: unsigned char reply[7]; ! 148: int track; ! 149: }; ! 150: ! 151: #include <linux/errno.h> ! 152: #include <linux/malloc.h> ! 153: #include <linux/mm.h> ! 154: #include <linux/string.h> ! 155: #include <linux/fcntl.h> ! 156: #include <linux/delay.h> ! 157: #include <linux/mc146818rtc.h> /* CMOS defines */ ! 158: #include <linux/ioport.h> ! 159: #include <linux/interrupt.h> ! 160: ! 161: #include <asm/dma.h> ! 162: #include <asm/irq.h> ! 163: #include <asm/system.h> ! 164: #include <asm/io.h> ! 165: #include <asm/segment.h> ! 166: ! 167: static int use_virtual_dma=0; /* virtual DMA for Intel */ ! 168: static unsigned short virtual_dma_port=0x3f0; ! 169: void floppy_interrupt(int irq, void *dev_id, struct pt_regs * regs); ! 170: static int set_dor(int fdc, char mask, char data); ! 171: static inline int __get_order(unsigned long size); ! 172: #include <asm/floppy.h> ! 173: ! 174: ! 175: #define MAJOR_NR FLOPPY_MAJOR ! 176: ! 177: #include <linux/blk.h> ! 178: #include <linux/cdrom.h> /* for the compatibility eject ioctl */ ! 179: ! 180: ! 181: #ifndef FLOPPY_MOTOR_MASK ! 182: #define FLOPPY_MOTOR_MASK 0xf0 ! 183: #endif ! 184: ! 185: #ifndef fd_get_dma_residue ! 186: #define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA) ! 187: #endif ! 188: ! 189: /* Dma Memory related stuff */ ! 190: ! 191: /* Pure 2^n version of get_order */ ! 192: static inline int __get_order(unsigned long size) ! 193: { ! 194: int order; ! 195: ! 196: size = (size-1) >> (PAGE_SHIFT-1); ! 197: order = -1; ! 198: do { ! 199: size >>= 1; ! 200: order++; ! 201: } while (size); ! 202: return order; ! 203: } ! 204: ! 205: #ifndef fd_dma_mem_free ! 206: #define fd_dma_mem_free(addr, size) free_pages(addr, __get_order(size)) ! 207: #endif ! 208: ! 209: #ifndef fd_dma_mem_alloc ! 210: #define fd_dma_mem_alloc(size) __get_dma_pages(GFP_KERNEL,__get_order(size)) ! 211: #endif ! 212: ! 213: /* End dma memory related stuff */ ! 214: ! 215: static unsigned int fake_change = 0; ! 216: static int initialising=1; ! 217: ! 218: static inline int TYPE(kdev_t x) { ! 219: return (MINOR(x)>>2) & 0x1f; ! 220: } ! 221: static inline int DRIVE(kdev_t x) { ! 222: return (MINOR(x)&0x03) | ((MINOR(x)&0x80) >> 5); ! 223: } ! 224: #define ITYPE(x) (((x)>>2) & 0x1f) ! 225: #define TOMINOR(x) ((x & 3) | ((x & 4) << 5)) ! 226: #define UNIT(x) ((x) & 0x03) /* drive on fdc */ ! 227: #define FDC(x) (((x) & 0x04) >> 2) /* fdc of drive */ ! 228: #define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2)) ! 229: /* reverse mapping from unit and fdc to drive */ ! 230: #define DP (&drive_params[current_drive]) ! 231: #define DRS (&drive_state[current_drive]) ! 232: #define DRWE (&write_errors[current_drive]) ! 233: #define FDCS (&fdc_state[fdc]) ! 234: #define CLEARF(x) (clear_bit(x##_BIT, &DRS->flags)) ! 235: #define SETF(x) (set_bit(x##_BIT, &DRS->flags)) ! 236: #define TESTF(x) (test_bit(x##_BIT, &DRS->flags)) ! 237: ! 238: #define UDP (&drive_params[drive]) ! 239: #define UDRS (&drive_state[drive]) ! 240: #define UDRWE (&write_errors[drive]) ! 241: #define UFDCS (&fdc_state[FDC(drive)]) ! 242: #define UCLEARF(x) (clear_bit(x##_BIT, &UDRS->flags)) ! 243: #define USETF(x) (set_bit(x##_BIT, &UDRS->flags)) ! 244: #define UTESTF(x) (test_bit(x##_BIT, &UDRS->flags)) ! 245: ! 246: #define DPRINT(format, args...) printk(DEVICE_NAME "%d: " format, current_drive , ## args) ! 247: ! 248: #define PH_HEAD(floppy,head) (((((floppy)->stretch & 2) >>1) ^ head) << 2) ! 249: #define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH) ! 250: ! 251: #define CLEARSTRUCT(x) memset((x), 0, sizeof(*(x))) ! 252: ! 253: #define INT_OFF save_flags(flags); cli() ! 254: #define INT_ON restore_flags(flags) ! 255: ! 256: /* read/write */ ! 257: #define COMMAND raw_cmd->cmd[0] ! 258: #define DR_SELECT raw_cmd->cmd[1] ! 259: #define TRACK raw_cmd->cmd[2] ! 260: #define HEAD raw_cmd->cmd[3] ! 261: #define SECTOR raw_cmd->cmd[4] ! 262: #define SIZECODE raw_cmd->cmd[5] ! 263: #define SECT_PER_TRACK raw_cmd->cmd[6] ! 264: #define GAP raw_cmd->cmd[7] ! 265: #define SIZECODE2 raw_cmd->cmd[8] ! 266: #define NR_RW 9 ! 267: ! 268: /* format */ ! 269: #define F_SIZECODE raw_cmd->cmd[2] ! 270: #define F_SECT_PER_TRACK raw_cmd->cmd[3] ! 271: #define F_GAP raw_cmd->cmd[4] ! 272: #define F_FILL raw_cmd->cmd[5] ! 273: #define NR_F 6 ! 274: ! 275: /* ! 276: * Maximum disk size (in kilobytes). This default is used whenever the ! 277: * current disk size is unknown. ! 278: * [Now it is rather a minimum] ! 279: */ ! 280: #define MAX_DISK_SIZE 4 /* 3984*/ ! 281: ! 282: #define K_64 0x10000 /* 64KB */ ! 283: ! 284: /* ! 285: * globals used by 'result()' ! 286: */ ! 287: #define MAX_REPLIES 16 ! 288: static unsigned char reply_buffer[MAX_REPLIES]; ! 289: static int inr; /* size of reply buffer, when called from interrupt */ ! 290: #define ST0 (reply_buffer[0]) ! 291: #define ST1 (reply_buffer[1]) ! 292: #define ST2 (reply_buffer[2]) ! 293: #define ST3 (reply_buffer[0]) /* result of GETSTATUS */ ! 294: #define R_TRACK (reply_buffer[3]) ! 295: #define R_HEAD (reply_buffer[4]) ! 296: #define R_SECTOR (reply_buffer[5]) ! 297: #define R_SIZECODE (reply_buffer[6]) ! 298: ! 299: #define SEL_DLY (2*HZ/100) ! 300: ! 301: #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) ! 302: /* ! 303: * this struct defines the different floppy drive types. ! 304: */ ! 305: static struct { ! 306: struct floppy_drive_params params; ! 307: const char *name; /* name printed while booting */ ! 308: } default_drive_params[]= { ! 309: /* NOTE: the time values in jiffies should be in msec! ! 310: CMOS drive type ! 311: | Maximum data rate supported by drive type ! 312: | | Head load time, msec ! 313: | | | Head unload time, msec (not used) ! 314: | | | | Step rate interval, usec ! 315: | | | | | Time needed for spinup time (jiffies) ! 316: | | | | | | Timeout for spinning down (jiffies) ! 317: | | | | | | | Spindown offset (where disk stops) ! 318: | | | | | | | | Select delay ! 319: | | | | | | | | | RPS ! 320: | | | | | | | | | | Max number of tracks ! 321: | | | | | | | | | | | Interrupt timeout ! 322: | | | | | | | | | | | | Max nonintlv. sectors ! 323: | | | | | | | | | | | | | -Max Errors- flags */ ! 324: {{0, 500, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 80, 3*HZ, 20, {3,1,2,0,2}, 0, ! 325: 0, { 7, 4, 8, 2, 1, 5, 3,10}, 3*HZ/2, 0 }, "unknown" }, ! 326: ! 327: {{1, 300, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 40, 3*HZ, 17, {3,1,2,0,2}, 0, ! 328: 0, { 1, 0, 0, 0, 0, 0, 0, 0}, 3*HZ/2, 1 }, "360K PC" }, /*5 1/4 360 KB PC*/ ! 329: ! 330: {{2, 500, 16, 16, 6000, 4*HZ/10, 3*HZ, 14, SEL_DLY, 6, 83, 3*HZ, 17, {3,1,2,0,2}, 0, ! 331: 0, { 2, 5, 6,23,10,20,12, 0}, 3*HZ/2, 2 }, "1.2M" }, /*5 1/4 HD AT*/ ! 332: ! 333: {{3, 250, 16, 16, 3000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0, ! 334: 0, { 4,22,21,30, 3, 0, 0, 0}, 3*HZ/2, 4 }, "720k" }, /*3 1/2 DD*/ ! 335: ! 336: {{4, 500, 16, 16, 4000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0, ! 337: 0, { 7, 4,25,22,31,21,29,11}, 3*HZ/2, 7 }, "1.44M" }, /*3 1/2 HD*/ ! 338: ! 339: {{5, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0, ! 340: 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M AMI BIOS" }, /*3 1/2 ED*/ ! 341: ! 342: {{6, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0, ! 343: 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M" } /*3 1/2 ED*/ ! 344: /* | --autodetected formats--- | | | ! 345: * read_track | | Name printed when booting ! 346: * | Native format ! 347: * Frequency of disk change checks */ ! 348: }; ! 349: ! 350: static struct floppy_drive_params drive_params[N_DRIVE]; ! 351: static struct floppy_drive_struct drive_state[N_DRIVE]; ! 352: static struct floppy_write_errors write_errors[N_DRIVE]; ! 353: static struct floppy_raw_cmd *raw_cmd, default_raw_cmd; ! 354: ! 355: /* ! 356: * This struct defines the different floppy types. ! 357: * ! 358: * Bit 0 of 'stretch' tells if the tracks need to be doubled for some ! 359: * types (e.g. 360kB diskette in 1.2MB drive, etc.). Bit 1 of 'stretch' ! 360: * tells if the disk is in Commodore 1581 format, which means side 0 sectors ! 361: * are located on side 1 of the disk but with a side 0 ID, and vice-versa. ! 362: * This is the same as the Sharp MZ-80 5.25" CP/M disk format, except that the ! 363: * 1581's logical side 0 is on physical side 1, whereas the Sharp's logical ! 364: * side 0 is on physical side 0 (but with the misnamed sector IDs). ! 365: * 'stretch' should probably be renamed to something more general, like ! 366: * 'options'. Other parameters should be self-explanatory (see also ! 367: * setfdprm(8)). ! 368: */ ! 369: static struct floppy_struct floppy_type[32] = { ! 370: { 0, 0,0, 0,0,0x00,0x00,0x00,0x00,NULL }, /* 0 no testing */ ! 371: { 720, 9,2,40,0,0x2A,0x02,0xDF,0x50,"d360" }, /* 1 360KB PC */ ! 372: { 2400,15,2,80,0,0x1B,0x00,0xDF,0x54,"h1200" }, /* 2 1.2MB AT */ ! 373: { 720, 9,1,80,0,0x2A,0x02,0xDF,0x50,"D360" }, /* 3 360KB SS 3.5" */ ! 374: { 1440, 9,2,80,0,0x2A,0x02,0xDF,0x50,"D720" }, /* 4 720KB 3.5" */ ! 375: { 720, 9,2,40,1,0x23,0x01,0xDF,0x50,"h360" }, /* 5 360KB AT */ ! 376: { 1440, 9,2,80,0,0x23,0x01,0xDF,0x50,"h720" }, /* 6 720KB AT */ ! 377: { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,"H1440" }, /* 7 1.44MB 3.5" */ ! 378: { 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"E2880" }, /* 8 2.88MB 3.5" */ ! 379: { 6240,39,2,80,0,0x1B,0x43,0xAF,0x28,"E3120"}, /* 9 3.12MB 3.5" */ ! 380: ! 381: { 2880,18,2,80,0,0x25,0x00,0xDF,0x02,"h1440" }, /* 10 1.44MB 5.25" */ ! 382: { 3360,21,2,80,0,0x1C,0x00,0xCF,0x0C,"H1680" }, /* 11 1.68MB 3.5" */ ! 383: { 820,10,2,41,1,0x25,0x01,0xDF,0x2E,"h410" }, /* 12 410KB 5.25" */ ! 384: { 1640,10,2,82,0,0x25,0x02,0xDF,0x2E,"H820" }, /* 13 820KB 3.5" */ ! 385: { 2952,18,2,82,0,0x25,0x00,0xDF,0x02,"h1476" }, /* 14 1.48MB 5.25" */ ! 386: { 3444,21,2,82,0,0x25,0x00,0xDF,0x0C,"H1722" }, /* 15 1.72MB 3.5" */ ! 387: { 840,10,2,42,1,0x25,0x01,0xDF,0x2E,"h420" }, /* 16 420KB 5.25" */ ! 388: { 1660,10,2,83,0,0x25,0x02,0xDF,0x2E,"H830" }, /* 17 830KB 3.5" */ ! 389: { 2988,18,2,83,0,0x25,0x00,0xDF,0x02,"h1494" }, /* 18 1.49MB 5.25" */ ! 390: { 3486,21,2,83,0,0x25,0x00,0xDF,0x0C,"H1743" }, /* 19 1.74 MB 3.5" */ ! 391: ! 392: { 1760,11,2,80,0,0x1C,0x09,0xCF,0x00,"h880" }, /* 20 880KB 5.25" */ ! 393: { 2080,13,2,80,0,0x1C,0x01,0xCF,0x00,"D1040" }, /* 21 1.04MB 3.5" */ ! 394: { 2240,14,2,80,0,0x1C,0x19,0xCF,0x00,"D1120" }, /* 22 1.12MB 3.5" */ ! 395: { 3200,20,2,80,0,0x1C,0x20,0xCF,0x2C,"h1600" }, /* 23 1.6MB 5.25" */ ! 396: { 3520,22,2,80,0,0x1C,0x08,0xCF,0x2e,"H1760" }, /* 24 1.76MB 3.5" */ ! 397: { 3840,24,2,80,0,0x1C,0x20,0xCF,0x00,"H1920" }, /* 25 1.92MB 3.5" */ ! 398: { 6400,40,2,80,0,0x25,0x5B,0xCF,0x00,"E3200" }, /* 26 3.20MB 3.5" */ ! 399: { 7040,44,2,80,0,0x25,0x5B,0xCF,0x00,"E3520" }, /* 27 3.52MB 3.5" */ ! 400: { 7680,48,2,80,0,0x25,0x63,0xCF,0x00,"E3840" }, /* 28 3.84MB 3.5" */ ! 401: ! 402: { 3680,23,2,80,0,0x1C,0x10,0xCF,0x00,"H1840" }, /* 29 1.84MB 3.5" */ ! 403: { 1600,10,2,80,0,0x25,0x02,0xDF,0x2E,"D800" }, /* 30 800KB 3.5" */ ! 404: { 3200,20,2,80,0,0x1C,0x00,0xCF,0x2C,"H1600" }, /* 31 1.6MB 3.5" */ ! 405: }; ! 406: ! 407: #define NUMBER(x) (sizeof(x) / sizeof(*(x))) ! 408: #define SECTSIZE (_FD_SECTSIZE(*floppy)) ! 409: ! 410: /* Auto-detection: Disk type used until the next media change occurs. */ ! 411: static struct floppy_struct *current_type[N_DRIVE] = { ! 412: NULL, NULL, NULL, NULL, ! 413: NULL, NULL, NULL, NULL ! 414: }; ! 415: ! 416: /* ! 417: * User-provided type information. current_type points to ! 418: * the respective entry of this array. ! 419: */ ! 420: static struct floppy_struct user_params[N_DRIVE]; ! 421: ! 422: static int floppy_sizes[256]; ! 423: static int floppy_blocksizes[256] = { 0, }; ! 424: ! 425: /* ! 426: * The driver is trying to determine the correct media format ! 427: * while probing is set. rw_interrupt() clears it after a ! 428: * successful access. ! 429: */ ! 430: static int probing = 0; ! 431: ! 432: /* Synchronization of FDC access. */ ! 433: #define FD_COMMAND_NONE -1 ! 434: #define FD_COMMAND_ERROR 2 ! 435: #define FD_COMMAND_OKAY 3 ! 436: ! 437: static volatile int command_status = FD_COMMAND_NONE, fdc_busy = 0; ! 438: static struct wait_queue *fdc_wait = NULL, *command_done = NULL; ! 439: #define NO_SIGNAL (!(current->signal & ~current->blocked) || !interruptible) ! 440: #define CALL(x) if ((x) == -EINTR) return -EINTR ! 441: #define ECALL(x) if ((ret = (x))) return ret; ! 442: #define _WAIT(x,i) CALL(ret=wait_til_done((x),i)) ! 443: #define WAIT(x) _WAIT((x),interruptible) ! 444: #define IWAIT(x) _WAIT((x),1) ! 445: ! 446: /* Errors during formatting are counted here. */ ! 447: static int format_errors; ! 448: ! 449: /* Format request descriptor. */ ! 450: static struct format_descr format_req; ! 451: ! 452: /* ! 453: * Rate is 0 for 500kb/s, 1 for 300kbps, 2 for 250kbps ! 454: * Spec1 is 0xSH, where S is stepping rate (F=1ms, E=2ms, D=3ms etc), ! 455: * H is head unload time (1=16ms, 2=32ms, etc) ! 456: */ ! 457: ! 458: /* ! 459: * Track buffer ! 460: * Because these are written to by the DMA controller, they must ! 461: * not contain a 64k byte boundary crossing, or data will be ! 462: * corrupted/lost. ! 463: */ ! 464: static char *floppy_track_buffer=0; ! 465: static int max_buffer_sectors=0; ! 466: ! 467: static int *errors; ! 468: typedef void (*done_f)(int); ! 469: static struct cont_t { ! 470: void (*interrupt)(void); /* this is called after the interrupt of the ! 471: * main command */ ! 472: void (*redo)(void); /* this is called to retry the operation */ ! 473: void (*error)(void); /* this is called to tally an error */ ! 474: done_f done; /* this is called to say if the operation has ! 475: * succeeded/failed */ ! 476: } *cont=NULL; ! 477: ! 478: static void floppy_ready(void); ! 479: static void floppy_start(void); ! 480: static void process_fd_request(void); ! 481: static void recalibrate_floppy(void); ! 482: static void floppy_shutdown(void); ! 483: ! 484: static int floppy_grab_irq_and_dma(void); ! 485: static void floppy_release_irq_and_dma(void); ! 486: ! 487: /* ! 488: * The "reset" variable should be tested whenever an interrupt is scheduled, ! 489: * after the commands have been sent. This is to ensure that the driver doesn't ! 490: * get wedged when the interrupt doesn't come because of a failed command. ! 491: * reset doesn't need to be tested before sending commands, because ! 492: * output_byte is automatically disabled when reset is set. ! 493: */ ! 494: #define CHECK_RESET { if (FDCS->reset){ reset_fdc(); return; } } ! 495: static void reset_fdc(void); ! 496: ! 497: /* ! 498: * These are global variables, as that's the easiest way to give ! 499: * information to interrupts. They are the data used for the current ! 500: * request. ! 501: */ ! 502: #define NO_TRACK -1 ! 503: #define NEED_1_RECAL -2 ! 504: #define NEED_2_RECAL -3 ! 505: ! 506: /* */ ! 507: static int usage_count = 0; ! 508: ! 509: ! 510: /* buffer related variables */ ! 511: static int buffer_track = -1; ! 512: static int buffer_drive = -1; ! 513: static int buffer_min = -1; ! 514: static int buffer_max = -1; ! 515: ! 516: /* fdc related variables, should end up in a struct */ ! 517: static struct floppy_fdc_state fdc_state[N_FDC]; ! 518: static int fdc; /* current fdc */ ! 519: ! 520: static struct floppy_struct *_floppy = floppy_type; ! 521: static unsigned char current_drive = 0; ! 522: static long current_count_sectors = 0; ! 523: static unsigned char sector_t; /* sector in track */ ! 524: ! 525: #ifndef fd_eject ! 526: #define fd_eject(x) -EINVAL ! 527: #endif ! 528: ! 529: ! 530: #ifdef DEBUGT ! 531: static long unsigned debugtimer; ! 532: #endif ! 533: ! 534: /* ! 535: * Debugging ! 536: * ========= ! 537: */ ! 538: static inline void set_debugt(void) ! 539: { ! 540: #ifdef DEBUGT ! 541: debugtimer = jiffies; ! 542: #endif ! 543: } ! 544: ! 545: static inline void debugt(const char *message) ! 546: { ! 547: #ifdef DEBUGT ! 548: if (DP->flags & DEBUGT) ! 549: printk("%s dtime=%lu\n", message, jiffies-debugtimer); ! 550: #endif ! 551: } ! 552: ! 553: typedef void (*timeout_fn)(unsigned long); ! 554: static struct timer_list fd_timeout ={ NULL, NULL, 0, 0, ! 555: (timeout_fn) floppy_shutdown }; ! 556: ! 557: static const char *timeout_message; ! 558: ! 559: #ifdef FLOPPY_SANITY_CHECK ! 560: static void is_alive(const char *message) ! 561: { ! 562: /* this routine checks whether the floppy driver is "alive" */ ! 563: if (fdc_busy && command_status < 2 && !fd_timeout.prev){ ! 564: DPRINT("timeout handler died: %s\n",message); ! 565: } ! 566: } ! 567: #endif ! 568: ! 569: #ifdef FLOPPY_SANITY_CHECK ! 570: ! 571: #define OLOGSIZE 20 ! 572: ! 573: static void (*lasthandler)(void) = NULL; ! 574: static int interruptjiffies=0; ! 575: static int resultjiffies=0; ! 576: static int resultsize=0; ! 577: static int lastredo=0; ! 578: ! 579: static struct output_log { ! 580: unsigned char data; ! 581: unsigned char status; ! 582: unsigned long jiffies; ! 583: } output_log[OLOGSIZE]; ! 584: ! 585: static int output_log_pos=0; ! 586: #endif ! 587: ! 588: #define CURRENTD -1 ! 589: #define MAXTIMEOUT -2 ! 590: ! 591: static void reschedule_timeout(int drive, const char *message, int marg) ! 592: { ! 593: if (drive == CURRENTD) ! 594: drive = current_drive; ! 595: del_timer(&fd_timeout); ! 596: if (drive < 0 || drive > N_DRIVE) { ! 597: fd_timeout.expires = jiffies + 20*HZ; ! 598: drive=0; ! 599: } else ! 600: fd_timeout.expires = jiffies + UDP->timeout; ! 601: add_timer(&fd_timeout); ! 602: if (UDP->flags & FD_DEBUG){ ! 603: DPRINT("reschedule timeout "); ! 604: printk(message, marg); ! 605: printk("\n"); ! 606: } ! 607: timeout_message = message; ! 608: } ! 609: ! 610: static int maximum(int a, int b) ! 611: { ! 612: if(a > b) ! 613: return a; ! 614: else ! 615: return b; ! 616: } ! 617: #define INFBOUND(a,b) (a)=maximum((a),(b)); ! 618: ! 619: static int minimum(int a, int b) ! 620: { ! 621: if(a < b) ! 622: return a; ! 623: else ! 624: return b; ! 625: } ! 626: #define SUPBOUND(a,b) (a)=minimum((a),(b)); ! 627: ! 628: ! 629: /* ! 630: * Bottom half floppy driver. ! 631: * ========================== ! 632: * ! 633: * This part of the file contains the code talking directly to the hardware, ! 634: * and also the main service loop (seek-configure-spinup-command) ! 635: */ ! 636: ! 637: /* ! 638: * disk change. ! 639: * This routine is responsible for maintaining the FD_DISK_CHANGE flag, ! 640: * and the last_checked date. ! 641: * ! 642: * last_checked is the date of the last check which showed 'no disk change' ! 643: * FD_DISK_CHANGE is set under two conditions: ! 644: * 1. The floppy has been changed after some i/o to that floppy already ! 645: * took place. ! 646: * 2. No floppy disk is in the drive. This is done in order to ensure that ! 647: * requests are quickly flushed in case there is no disk in the drive. It ! 648: * follows that FD_DISK_CHANGE can only be cleared if there is a disk in ! 649: * the drive. ! 650: * ! 651: * For 1., maxblock is observed. Maxblock is 0 if no i/o has taken place yet. ! 652: * For 2., FD_DISK_NEWCHANGE is watched. FD_DISK_NEWCHANGE is cleared on ! 653: * each seek. If a disk is present, the disk change line should also be ! 654: * cleared on each seek. Thus, if FD_DISK_NEWCHANGE is clear, but the disk ! 655: * change line is set, this means either that no disk is in the drive, or ! 656: * that it has been removed since the last seek. ! 657: * ! 658: * This means that we really have a third possibility too: ! 659: * The floppy has been changed after the last seek. ! 660: */ ! 661: ! 662: static int disk_change(int drive) ! 663: { ! 664: int fdc=FDC(drive); ! 665: #ifdef FLOPPY_SANITY_CHECK ! 666: if (jiffies - UDRS->select_date < UDP->select_delay) ! 667: DPRINT("WARNING disk change called early\n"); ! 668: if (!(FDCS->dor & (0x10 << UNIT(drive))) || ! 669: (FDCS->dor & 3) != UNIT(drive) || ! 670: fdc != FDC(drive)){ ! 671: DPRINT("probing disk change on unselected drive\n"); ! 672: DPRINT("drive=%d fdc=%d dor=%x\n",drive, FDC(drive), ! 673: FDCS->dor); ! 674: } ! 675: #endif ! 676: ! 677: #ifdef DCL_DEBUG ! 678: if (UDP->flags & FD_DEBUG){ ! 679: DPRINT("checking disk change line for drive %d\n",drive); ! 680: DPRINT("jiffies=%ld\n", jiffies); ! 681: DPRINT("disk change line=%x\n",fd_inb(FD_DIR)&0x80); ! 682: DPRINT("flags=%x\n",UDRS->flags); ! 683: } ! 684: #endif ! 685: if (UDP->flags & FD_BROKEN_DCL) ! 686: return UTESTF(FD_DISK_CHANGED); ! 687: if ((fd_inb(FD_DIR) ^ UDP->flags) & 0x80){ ! 688: USETF(FD_VERIFY); /* verify write protection */ ! 689: if (UDRS->maxblock){ ! 690: /* mark it changed */ ! 691: USETF(FD_DISK_CHANGED); ! 692: } ! 693: ! 694: /* invalidate its geometry */ ! 695: if (UDRS->keep_data >= 0) { ! 696: if ((UDP->flags & FTD_MSG) && ! 697: current_type[drive] != NULL) ! 698: DPRINT("Disk type is undefined after " ! 699: "disk change\n"); ! 700: current_type[drive] = NULL; ! 701: floppy_sizes[TOMINOR(drive)] = MAX_DISK_SIZE; ! 702: } ! 703: ! 704: /*USETF(FD_DISK_NEWCHANGE);*/ ! 705: return 1; ! 706: } else { ! 707: UDRS->last_checked=jiffies; ! 708: UCLEARF(FD_DISK_NEWCHANGE); ! 709: } ! 710: return 0; ! 711: } ! 712: ! 713: static inline int is_selected(int dor, int unit) ! 714: { ! 715: return ((dor & (0x10 << unit)) && (dor &3) == unit); ! 716: } ! 717: ! 718: static int set_dor(int fdc, char mask, char data) ! 719: { ! 720: register unsigned char drive, unit, newdor,olddor; ! 721: ! 722: if (FDCS->address == -1) ! 723: return -1; ! 724: ! 725: olddor = FDCS->dor; ! 726: newdor = (olddor & mask) | data; ! 727: if (newdor != olddor){ ! 728: unit = olddor & 0x3; ! 729: if (is_selected(olddor, unit) && !is_selected(newdor,unit)){ ! 730: drive = REVDRIVE(fdc,unit); ! 731: #ifdef DCL_DEBUG ! 732: if (UDP->flags & FD_DEBUG){ ! 733: DPRINT("calling disk change from set_dor\n"); ! 734: } ! 735: #endif ! 736: disk_change(drive); ! 737: } ! 738: FDCS->dor = newdor; ! 739: fd_outb(newdor, FD_DOR); ! 740: ! 741: unit = newdor & 0x3; ! 742: if (!is_selected(olddor, unit) && is_selected(newdor,unit)){ ! 743: drive = REVDRIVE(fdc,unit); ! 744: UDRS->select_date = jiffies; ! 745: } ! 746: } ! 747: ! 748: /* FIXME: we should be more graceful here */ ! 749: ! 750: if (newdor & FLOPPY_MOTOR_MASK) ! 751: floppy_grab_irq_and_dma(); ! 752: if (olddor & FLOPPY_MOTOR_MASK) ! 753: floppy_release_irq_and_dma(); ! 754: return olddor; ! 755: } ! 756: ! 757: static void twaddle(void) ! 758: { ! 759: if (DP->select_delay) ! 760: return; ! 761: fd_outb(FDCS->dor & ~(0x10<<UNIT(current_drive)),FD_DOR); ! 762: fd_outb(FDCS->dor, FD_DOR); ! 763: DRS->select_date = jiffies; ! 764: } ! 765: ! 766: /* reset all driver information about the current fdc. This is needed after ! 767: * a reset, and after a raw command. */ ! 768: static void reset_fdc_info(int mode) ! 769: { ! 770: int drive; ! 771: ! 772: FDCS->spec1 = FDCS->spec2 = -1; ! 773: FDCS->need_configure = 1; ! 774: FDCS->perp_mode = 1; ! 775: FDCS->rawcmd = 0; ! 776: for (drive = 0; drive < N_DRIVE; drive++) ! 777: if (FDC(drive) == fdc && ! 778: (mode || UDRS->track != NEED_1_RECAL)) ! 779: UDRS->track = NEED_2_RECAL; ! 780: } ! 781: ! 782: /* selects the fdc and drive, and enables the fdc's input/dma. */ ! 783: static void set_fdc(int drive) ! 784: { ! 785: if (drive >= 0 && drive < N_DRIVE){ ! 786: fdc = FDC(drive); ! 787: current_drive = drive; ! 788: } ! 789: if (fdc != 1 && fdc != 0) { ! 790: printk("bad fdc value\n"); ! 791: return; ! 792: } ! 793: set_dor(fdc,~0,8); ! 794: #if N_FDC > 1 ! 795: set_dor(1-fdc, ~8, 0); ! 796: #endif ! 797: if (FDCS->rawcmd == 2) ! 798: reset_fdc_info(1); ! 799: if (fd_inb(FD_STATUS) != STATUS_READY) ! 800: FDCS->reset = 1; ! 801: } ! 802: ! 803: /* locks the driver */ ! 804: static int lock_fdc(int drive, int interruptible) ! 805: { ! 806: unsigned long flags; ! 807: ! 808: if (!usage_count){ ! 809: printk(KERN_ERR "trying to lock fdc while usage count=0\n"); ! 810: return -1; ! 811: } ! 812: if(floppy_grab_irq_and_dma()==-1) ! 813: return -EBUSY; ! 814: INT_OFF; ! 815: while (fdc_busy && NO_SIGNAL) ! 816: interruptible_sleep_on(&fdc_wait); ! 817: if (fdc_busy){ ! 818: INT_ON; ! 819: return -EINTR; ! 820: } ! 821: fdc_busy = 1; ! 822: INT_ON; ! 823: command_status = FD_COMMAND_NONE; ! 824: reschedule_timeout(drive, "lock fdc", 0); ! 825: set_fdc(drive); ! 826: return 0; ! 827: } ! 828: ! 829: #define LOCK_FDC(drive,interruptible) \ ! 830: if (lock_fdc(drive,interruptible)) return -EINTR; ! 831: ! 832: ! 833: /* unlocks the driver */ ! 834: static inline void unlock_fdc(void) ! 835: { ! 836: raw_cmd = 0; ! 837: if (!fdc_busy) ! 838: DPRINT("FDC access conflict!\n"); ! 839: ! 840: if (DEVICE_INTR) ! 841: DPRINT("device interrupt still active at FDC release: %p!\n", ! 842: DEVICE_INTR); ! 843: command_status = FD_COMMAND_NONE; ! 844: del_timer(&fd_timeout); ! 845: cont = NULL; ! 846: fdc_busy = 0; ! 847: floppy_release_irq_and_dma(); ! 848: wake_up(&fdc_wait); ! 849: } ! 850: ! 851: /* switches the motor off after a given timeout */ ! 852: static void motor_off_callback(unsigned long nr) ! 853: { ! 854: unsigned char mask = ~(0x10 << UNIT(nr)); ! 855: ! 856: set_dor(FDC(nr), mask, 0); ! 857: } ! 858: ! 859: static struct timer_list motor_off_timer[N_DRIVE] = { ! 860: { NULL, NULL, 0, 0, motor_off_callback }, ! 861: { NULL, NULL, 0, 1, motor_off_callback }, ! 862: { NULL, NULL, 0, 2, motor_off_callback }, ! 863: { NULL, NULL, 0, 3, motor_off_callback }, ! 864: { NULL, NULL, 0, 4, motor_off_callback }, ! 865: { NULL, NULL, 0, 5, motor_off_callback }, ! 866: { NULL, NULL, 0, 6, motor_off_callback }, ! 867: { NULL, NULL, 0, 7, motor_off_callback } ! 868: }; ! 869: ! 870: /* schedules motor off */ ! 871: static void floppy_off(unsigned int drive) ! 872: { ! 873: unsigned long volatile delta; ! 874: register int fdc=FDC(drive); ! 875: ! 876: if (!(FDCS->dor & (0x10 << UNIT(drive)))) ! 877: return; ! 878: ! 879: del_timer(motor_off_timer+drive); ! 880: ! 881: /* make spindle stop in a position which minimizes spinup time ! 882: * next time */ ! 883: if (UDP->rps){ ! 884: delta = jiffies - UDRS->first_read_date + HZ - ! 885: UDP->spindown_offset; ! 886: delta = ((delta * UDP->rps) % HZ) / UDP->rps; ! 887: motor_off_timer[drive].expires = jiffies + UDP->spindown - delta; ! 888: } ! 889: add_timer(motor_off_timer+drive); ! 890: } ! 891: ! 892: /* ! 893: * cycle through all N_DRIVE floppy drives, for disk change testing. ! 894: * stopping at current drive. This is done before any long operation, to ! 895: * be sure to have up to date disk change information. ! 896: */ ! 897: static void scandrives(void) ! 898: { ! 899: int i, drive, saved_drive; ! 900: ! 901: if (DP->select_delay) ! 902: return; ! 903: ! 904: saved_drive = current_drive; ! 905: for (i=0; i < N_DRIVE; i++){ ! 906: drive = (saved_drive + i + 1) % N_DRIVE; ! 907: if (UDRS->fd_ref == 0 || UDP->select_delay != 0) ! 908: continue; /* skip closed drives */ ! 909: set_fdc(drive); ! 910: if (!(set_dor(fdc, ~3, UNIT(drive) | (0x10 << UNIT(drive))) & ! 911: (0x10 << UNIT(drive)))) ! 912: /* switch the motor off again, if it was off to ! 913: * begin with */ ! 914: set_dor(fdc, ~(0x10 << UNIT(drive)), 0); ! 915: } ! 916: set_fdc(saved_drive); ! 917: } ! 918: ! 919: static void empty(void) ! 920: { ! 921: } ! 922: ! 923: static struct tq_struct floppy_tq = ! 924: { 0, 0, 0, 0 }; ! 925: ! 926: static struct timer_list fd_timer ={ NULL, NULL, 0, 0, 0 }; ! 927: ! 928: static void cancel_activity(void) ! 929: { ! 930: CLEAR_INTR; ! 931: floppy_tq.routine = (void *)(void *) empty; ! 932: del_timer(&fd_timer); ! 933: } ! 934: ! 935: /* this function makes sure that the disk stays in the drive during the ! 936: * transfer */ ! 937: static void fd_watchdog(void) ! 938: { ! 939: #ifdef DCL_DEBUG ! 940: if (DP->flags & FD_DEBUG){ ! 941: DPRINT("calling disk change from watchdog\n"); ! 942: } ! 943: #endif ! 944: ! 945: if (disk_change(current_drive)){ ! 946: DPRINT("disk removed during i/o\n"); ! 947: cancel_activity(); ! 948: cont->done(0); ! 949: reset_fdc(); ! 950: } else { ! 951: del_timer(&fd_timer); ! 952: fd_timer.function = (timeout_fn) fd_watchdog; ! 953: fd_timer.expires = jiffies + HZ / 10; ! 954: add_timer(&fd_timer); ! 955: } ! 956: } ! 957: ! 958: static void main_command_interrupt(void) ! 959: { ! 960: del_timer(&fd_timer); ! 961: cont->interrupt(); ! 962: } ! 963: ! 964: /* waits for a delay (spinup or select) to pass */ ! 965: static int wait_for_completion(int delay, timeout_fn function) ! 966: { ! 967: if (FDCS->reset){ ! 968: reset_fdc(); /* do the reset during sleep to win time ! 969: * if we don't need to sleep, it's a good ! 970: * occasion anyways */ ! 971: return 1; ! 972: } ! 973: ! 974: if ((signed) (jiffies - delay) < 0){ ! 975: del_timer(&fd_timer); ! 976: fd_timer.function = function; ! 977: fd_timer.expires = delay; ! 978: add_timer(&fd_timer); ! 979: return 1; ! 980: } ! 981: return 0; ! 982: } ! 983: ! 984: static int hlt_disabled=0; ! 985: static void floppy_disable_hlt(void) ! 986: { ! 987: unsigned long flags; ! 988: ! 989: INT_OFF; ! 990: if (!hlt_disabled){ ! 991: hlt_disabled=1; ! 992: #ifdef HAVE_DISABLE_HLT ! 993: disable_hlt(); ! 994: #endif ! 995: } ! 996: INT_ON; ! 997: } ! 998: ! 999: static void floppy_enable_hlt(void) ! 1000: { ! 1001: unsigned long flags; ! 1002: ! 1003: INT_OFF; ! 1004: if (hlt_disabled){ ! 1005: hlt_disabled=0; ! 1006: #ifdef HAVE_DISABLE_HLT ! 1007: enable_hlt(); ! 1008: #endif ! 1009: } ! 1010: INT_ON; ! 1011: } ! 1012: ! 1013: ! 1014: static void setup_DMA(void) ! 1015: { ! 1016: unsigned long flags; ! 1017: ! 1018: #ifdef FLOPPY_SANITY_CHECK ! 1019: if (raw_cmd->length == 0){ ! 1020: int i; ! 1021: ! 1022: printk("zero dma transfer size:"); ! 1023: for (i=0; i < raw_cmd->cmd_count; i++) ! 1024: printk("%x,", raw_cmd->cmd[i]); ! 1025: printk("\n"); ! 1026: cont->done(0); ! 1027: FDCS->reset = 1; ! 1028: return; ! 1029: } ! 1030: if ((long) raw_cmd->kernel_data % 512){ ! 1031: printk("non aligned address: %p\n", raw_cmd->kernel_data); ! 1032: cont->done(0); ! 1033: FDCS->reset=1; ! 1034: return; ! 1035: } ! 1036: if (CROSS_64KB(raw_cmd->kernel_data, raw_cmd->length)) { ! 1037: printk("DMA crossing 64-K boundary %p-%p\n", ! 1038: raw_cmd->kernel_data, ! 1039: raw_cmd->kernel_data + raw_cmd->length); ! 1040: cont->done(0); ! 1041: FDCS->reset=1; ! 1042: return; ! 1043: } ! 1044: #endif ! 1045: INT_OFF; ! 1046: fd_disable_dma(); ! 1047: fd_clear_dma_ff(); ! 1048: fd_cacheflush(raw_cmd->kernel_data, raw_cmd->length); ! 1049: fd_set_dma_mode((raw_cmd->flags & FD_RAW_READ)? ! 1050: DMA_MODE_READ : DMA_MODE_WRITE); ! 1051: fd_set_dma_addr(virt_to_bus(raw_cmd->kernel_data)); ! 1052: fd_set_dma_count(raw_cmd->length); ! 1053: virtual_dma_port = FDCS->address; ! 1054: fd_enable_dma(); ! 1055: INT_ON; ! 1056: floppy_disable_hlt(); ! 1057: } ! 1058: ! 1059: void show_floppy(void); ! 1060: ! 1061: /* waits until the fdc becomes ready */ ! 1062: static int wait_til_ready(void) ! 1063: { ! 1064: int counter, status; ! 1065: if(FDCS->reset) ! 1066: return -1; ! 1067: for (counter = 0; counter < 10000; counter++) { ! 1068: status = fd_inb(FD_STATUS); ! 1069: if (status & STATUS_READY) ! 1070: return status; ! 1071: } ! 1072: if (!initialising) { ! 1073: DPRINT("Getstatus times out (%x) on fdc %d\n", ! 1074: status, fdc); ! 1075: show_floppy(); ! 1076: } ! 1077: FDCS->reset = 1; ! 1078: return -1; ! 1079: } ! 1080: ! 1081: /* sends a command byte to the fdc */ ! 1082: static int output_byte(char byte) ! 1083: { ! 1084: int status; ! 1085: ! 1086: if ((status = wait_til_ready()) < 0) ! 1087: return -1; ! 1088: if ((status & (STATUS_READY|STATUS_DIR|STATUS_DMA)) == STATUS_READY){ ! 1089: fd_outb(byte,FD_DATA); ! 1090: #ifdef FLOPPY_SANITY_CHECK ! 1091: output_log[output_log_pos].data = byte; ! 1092: output_log[output_log_pos].status = status; ! 1093: output_log[output_log_pos].jiffies = jiffies; ! 1094: output_log_pos = (output_log_pos + 1) % OLOGSIZE; ! 1095: #endif ! 1096: return 0; ! 1097: } ! 1098: FDCS->reset = 1; ! 1099: if (!initialising) { ! 1100: DPRINT("Unable to send byte %x to FDC. Fdc=%x Status=%x\n", ! 1101: byte, fdc, status); ! 1102: show_floppy(); ! 1103: } ! 1104: return -1; ! 1105: } ! 1106: #define LAST_OUT(x) if (output_byte(x)<0){ reset_fdc();return;} ! 1107: ! 1108: /* gets the response from the fdc */ ! 1109: static int result(void) ! 1110: { ! 1111: int i, status; ! 1112: ! 1113: for(i=0; i < MAX_REPLIES; i++) { ! 1114: if ((status = wait_til_ready()) < 0) ! 1115: break; ! 1116: status &= STATUS_DIR|STATUS_READY|STATUS_BUSY|STATUS_DMA; ! 1117: if ((status & ~STATUS_BUSY) == STATUS_READY){ ! 1118: #ifdef FLOPPY_SANITY_CHECK ! 1119: resultjiffies = jiffies; ! 1120: resultsize = i; ! 1121: #endif ! 1122: return i; ! 1123: } ! 1124: if (status == (STATUS_DIR|STATUS_READY|STATUS_BUSY)) ! 1125: reply_buffer[i] = fd_inb(FD_DATA); ! 1126: else ! 1127: break; ! 1128: } ! 1129: if(!initialising) { ! 1130: DPRINT("get result error. Fdc=%d Last status=%x Read bytes=%d\n", ! 1131: fdc, status, i); ! 1132: show_floppy(); ! 1133: } ! 1134: FDCS->reset = 1; ! 1135: return -1; ! 1136: } ! 1137: ! 1138: #define MORE_OUTPUT -2 ! 1139: /* does the fdc need more output? */ ! 1140: static int need_more_output(void) ! 1141: { ! 1142: int status; ! 1143: if( (status = wait_til_ready()) < 0) ! 1144: return -1; ! 1145: if ((status & (STATUS_READY|STATUS_DIR|STATUS_DMA)) == STATUS_READY) ! 1146: return MORE_OUTPUT; ! 1147: return result(); ! 1148: } ! 1149: ! 1150: /* Set perpendicular mode as required, based on data rate, if supported. ! 1151: * 82077 Now tested. 1Mbps data rate only possible with 82077-1. ! 1152: */ ! 1153: static inline void perpendicular_mode(void) ! 1154: { ! 1155: unsigned char perp_mode; ! 1156: ! 1157: if (raw_cmd->rate & 0x40){ ! 1158: switch(raw_cmd->rate & 3){ ! 1159: case 0: ! 1160: perp_mode=2; ! 1161: break; ! 1162: case 3: ! 1163: perp_mode=3; ! 1164: break; ! 1165: default: ! 1166: DPRINT("Invalid data rate for perpendicular mode!\n"); ! 1167: cont->done(0); ! 1168: FDCS->reset = 1; /* convenient way to return to ! 1169: * redo without to much hassle (deep ! 1170: * stack et al. */ ! 1171: return; ! 1172: } ! 1173: } else ! 1174: perp_mode = 0; ! 1175: ! 1176: if (FDCS->perp_mode == perp_mode) ! 1177: return; ! 1178: if (FDCS->version >= FDC_82077_ORIG) { ! 1179: output_byte(FD_PERPENDICULAR); ! 1180: output_byte(perp_mode); ! 1181: FDCS->perp_mode = perp_mode; ! 1182: } else if (perp_mode) { ! 1183: DPRINT("perpendicular mode not supported by this FDC.\n"); ! 1184: } ! 1185: } /* perpendicular_mode */ ! 1186: ! 1187: static int fifo_depth = 0xa; ! 1188: static int no_fifo = 0; ! 1189: ! 1190: static int fdc_configure(void) ! 1191: { ! 1192: /* Turn on FIFO */ ! 1193: output_byte(FD_CONFIGURE); ! 1194: if(need_more_output() != MORE_OUTPUT) ! 1195: return 0; ! 1196: output_byte(0); ! 1197: output_byte(0x10 | (no_fifo & 0x20) | (fifo_depth & 0xf)); ! 1198: output_byte(0); /* pre-compensation from track ! 1199: 0 upwards */ ! 1200: return 1; ! 1201: } ! 1202: ! 1203: #define NOMINAL_DTR 500 ! 1204: ! 1205: /* Issue a "SPECIFY" command to set the step rate time, head unload time, ! 1206: * head load time, and DMA disable flag to values needed by floppy. ! 1207: * ! 1208: * The value "dtr" is the data transfer rate in Kbps. It is needed ! 1209: * to account for the data rate-based scaling done by the 82072 and 82077 ! 1210: * FDC types. This parameter is ignored for other types of FDCs (i.e. ! 1211: * 8272a). ! 1212: * ! 1213: * Note that changing the data transfer rate has a (probably deleterious) ! 1214: * effect on the parameters subject to scaling for 82072/82077 FDCs, so ! 1215: * fdc_specify is called again after each data transfer rate ! 1216: * change. ! 1217: * ! 1218: * srt: 1000 to 16000 in microseconds ! 1219: * hut: 16 to 240 milliseconds ! 1220: * hlt: 2 to 254 milliseconds ! 1221: * ! 1222: * These values are rounded up to the next highest available delay time. ! 1223: */ ! 1224: static void fdc_specify(void) ! 1225: { ! 1226: unsigned char spec1, spec2; ! 1227: int srt, hlt, hut; ! 1228: unsigned long dtr = NOMINAL_DTR; ! 1229: unsigned long scale_dtr = NOMINAL_DTR; ! 1230: int hlt_max_code = 0x7f; ! 1231: int hut_max_code = 0xf; ! 1232: ! 1233: if (FDCS->need_configure && FDCS->version >= FDC_82072A) { ! 1234: fdc_configure(); ! 1235: FDCS->need_configure = 0; ! 1236: /*DPRINT("FIFO enabled\n");*/ ! 1237: } ! 1238: ! 1239: switch (raw_cmd->rate & 0x03) { ! 1240: case 3: ! 1241: dtr = 1000; ! 1242: break; ! 1243: case 1: ! 1244: dtr = 300; ! 1245: if (FDCS->version >= FDC_82078) { ! 1246: /* chose the default rate table, not the one ! 1247: * where 1 = 2 Mbps */ ! 1248: output_byte(FD_DRIVESPEC); ! 1249: if(need_more_output() == MORE_OUTPUT) { ! 1250: output_byte(UNIT(current_drive)); ! 1251: output_byte(0xc0); ! 1252: } ! 1253: } ! 1254: break; ! 1255: case 2: ! 1256: dtr = 250; ! 1257: break; ! 1258: } ! 1259: ! 1260: if (FDCS->version >= FDC_82072) { ! 1261: scale_dtr = dtr; ! 1262: hlt_max_code = 0x00; /* 0==256msec*dtr0/dtr (not linear!) */ ! 1263: hut_max_code = 0x0; /* 0==256msec*dtr0/dtr (not linear!) */ ! 1264: } ! 1265: ! 1266: /* Convert step rate from microseconds to milliseconds and 4 bits */ ! 1267: srt = 16 - (DP->srt*scale_dtr/1000 + NOMINAL_DTR - 1)/NOMINAL_DTR; ! 1268: SUPBOUND(srt, 0xf); ! 1269: INFBOUND(srt, 0); ! 1270: ! 1271: hlt = (DP->hlt*scale_dtr/2 + NOMINAL_DTR - 1)/NOMINAL_DTR; ! 1272: if (hlt < 0x01) ! 1273: hlt = 0x01; ! 1274: else if (hlt > 0x7f) ! 1275: hlt = hlt_max_code; ! 1276: ! 1277: hut = (DP->hut*scale_dtr/16 + NOMINAL_DTR - 1)/NOMINAL_DTR; ! 1278: if (hut < 0x1) ! 1279: hut = 0x1; ! 1280: else if (hut > 0xf) ! 1281: hut = hut_max_code; ! 1282: ! 1283: spec1 = (srt << 4) | hut; ! 1284: spec2 = (hlt << 1) | (use_virtual_dma & 1); ! 1285: ! 1286: /* If these parameters did not change, just return with success */ ! 1287: if (FDCS->spec1 != spec1 || FDCS->spec2 != spec2) { ! 1288: /* Go ahead and set spec1 and spec2 */ ! 1289: output_byte(FD_SPECIFY); ! 1290: output_byte(FDCS->spec1 = spec1); ! 1291: output_byte(FDCS->spec2 = spec2); ! 1292: } ! 1293: } /* fdc_specify */ ! 1294: ! 1295: /* Set the FDC's data transfer rate on behalf of the specified drive. ! 1296: * NOTE: with 82072/82077 FDCs, changing the data rate requires a reissue ! 1297: * of the specify command (i.e. using the fdc_specify function). ! 1298: */ ! 1299: static int fdc_dtr(void) ! 1300: { ! 1301: /* If data rate not already set to desired value, set it. */ ! 1302: if ((raw_cmd->rate & 3) == FDCS->dtr) ! 1303: return 0; ! 1304: ! 1305: /* Set dtr */ ! 1306: fd_outb(raw_cmd->rate & 3, FD_DCR); ! 1307: ! 1308: /* TODO: some FDC/drive combinations (C&T 82C711 with TEAC 1.2MB) ! 1309: * need a stabilization period of several milliseconds to be ! 1310: * enforced after data rate changes before R/W operations. ! 1311: * Pause 5 msec to avoid trouble. (Needs to be 2 jiffies) ! 1312: */ ! 1313: FDCS->dtr = raw_cmd->rate & 3; ! 1314: return(wait_for_completion(jiffies+2*HZ/100, ! 1315: (timeout_fn) floppy_ready)); ! 1316: } /* fdc_dtr */ ! 1317: ! 1318: static void tell_sector(void) ! 1319: { ! 1320: printk(": track %d, head %d, sector %d, size %d", ! 1321: R_TRACK, R_HEAD, R_SECTOR, R_SIZECODE); ! 1322: } /* tell_sector */ ! 1323: ! 1324: ! 1325: /* ! 1326: * OK, this error interpreting routine is called after a ! 1327: * DMA read/write has succeeded ! 1328: * or failed, so we check the results, and copy any buffers. ! 1329: * hhb: Added better error reporting. ! 1330: * ak: Made this into a separate routine. ! 1331: */ ! 1332: static int interpret_errors(void) ! 1333: { ! 1334: char bad; ! 1335: ! 1336: if (inr!=7) { ! 1337: DPRINT("-- FDC reply error"); ! 1338: FDCS->reset = 1; ! 1339: return 1; ! 1340: } ! 1341: ! 1342: /* check IC to find cause of interrupt */ ! 1343: switch (ST0 & ST0_INTR) { ! 1344: case 0x40: /* error occurred during command execution */ ! 1345: if (ST1 & ST1_EOC) ! 1346: return 0; /* occurs with pseudo-DMA */ ! 1347: bad = 1; ! 1348: if (ST1 & ST1_WP) { ! 1349: DPRINT("Drive is write protected\n"); ! 1350: CLEARF(FD_DISK_WRITABLE); ! 1351: cont->done(0); ! 1352: bad = 2; ! 1353: } else if (ST1 & ST1_ND) { ! 1354: SETF(FD_NEED_TWADDLE); ! 1355: } else if (ST1 & ST1_OR) { ! 1356: if (DP->flags & FTD_MSG) ! 1357: DPRINT("Over/Underrun - retrying\n"); ! 1358: bad = 0; ! 1359: }else if (*errors >= DP->max_errors.reporting){ ! 1360: DPRINT(""); ! 1361: if (ST0 & ST0_ECE) { ! 1362: printk("Recalibrate failed!"); ! 1363: } else if (ST2 & ST2_CRC) { ! 1364: printk("data CRC error"); ! 1365: tell_sector(); ! 1366: } else if (ST1 & ST1_CRC) { ! 1367: printk("CRC error"); ! 1368: tell_sector(); ! 1369: } else if ((ST1 & (ST1_MAM|ST1_ND)) || (ST2 & ST2_MAM)) { ! 1370: if (!probing) { ! 1371: printk("sector not found"); ! 1372: tell_sector(); ! 1373: } else ! 1374: printk("probe failed..."); ! 1375: } else if (ST2 & ST2_WC) { /* seek error */ ! 1376: printk("wrong cylinder"); ! 1377: } else if (ST2 & ST2_BC) { /* cylinder marked as bad */ ! 1378: printk("bad cylinder"); ! 1379: } else { ! 1380: printk("unknown error. ST[0..2] are: 0x%x 0x%x 0x%x", ST0, ST1, ST2); ! 1381: tell_sector(); ! 1382: } ! 1383: printk("\n"); ! 1384: ! 1385: } ! 1386: if (ST2 & ST2_WC || ST2 & ST2_BC) ! 1387: /* wrong cylinder => recal */ ! 1388: DRS->track = NEED_2_RECAL; ! 1389: return bad; ! 1390: case 0x80: /* invalid command given */ ! 1391: DPRINT("Invalid FDC command given!\n"); ! 1392: cont->done(0); ! 1393: return 2; ! 1394: case 0xc0: ! 1395: DPRINT("Abnormal termination caused by polling\n"); ! 1396: cont->error(); ! 1397: return 2; ! 1398: default: /* (0) Normal command termination */ ! 1399: return 0; ! 1400: } ! 1401: } ! 1402: ! 1403: /* ! 1404: * This routine is called when everything should be correctly set up ! 1405: * for the transfer (i.e. floppy motor is on, the correct floppy is ! 1406: * selected, and the head is sitting on the right track). ! 1407: */ ! 1408: static void setup_rw_floppy(void) ! 1409: { ! 1410: int i,ready_date,r, flags,dflags; ! 1411: timeout_fn function; ! 1412: ! 1413: flags = raw_cmd->flags; ! 1414: if (flags & (FD_RAW_READ | FD_RAW_WRITE)) ! 1415: flags |= FD_RAW_INTR; ! 1416: ! 1417: if ((flags & FD_RAW_SPIN) && !(flags & FD_RAW_NO_MOTOR)){ ! 1418: ready_date = DRS->spinup_date + DP->spinup; ! 1419: /* If spinup will take a long time, rerun scandrives ! 1420: * again just before spinup completion. Beware that ! 1421: * after scandrives, we must again wait for selection. ! 1422: */ ! 1423: if ((signed) (ready_date - jiffies) > DP->select_delay){ ! 1424: ready_date -= DP->select_delay; ! 1425: function = (timeout_fn) floppy_start; ! 1426: } else ! 1427: function = (timeout_fn) setup_rw_floppy; ! 1428: ! 1429: /* wait until the floppy is spinning fast enough */ ! 1430: if (wait_for_completion(ready_date,function)) ! 1431: return; ! 1432: } ! 1433: dflags = DRS->flags; ! 1434: ! 1435: if ((flags & FD_RAW_READ) || (flags & FD_RAW_WRITE)) ! 1436: setup_DMA(); ! 1437: ! 1438: if (flags & FD_RAW_INTR) ! 1439: SET_INTR(main_command_interrupt); ! 1440: ! 1441: r=0; ! 1442: for (i=0; i< raw_cmd->cmd_count; i++) ! 1443: r|=output_byte(raw_cmd->cmd[i]); ! 1444: ! 1445: #ifdef DEBUGT ! 1446: debugt("rw_command: "); ! 1447: #endif ! 1448: if (r){ ! 1449: cont->error(); ! 1450: reset_fdc(); ! 1451: return; ! 1452: } ! 1453: ! 1454: if (!(flags & FD_RAW_INTR)){ ! 1455: inr = result(); ! 1456: cont->interrupt(); ! 1457: } else if (flags & FD_RAW_NEED_DISK) ! 1458: fd_watchdog(); ! 1459: } ! 1460: ! 1461: static int blind_seek; ! 1462: ! 1463: /* ! 1464: * This is the routine called after every seek (or recalibrate) interrupt ! 1465: * from the floppy controller. ! 1466: */ ! 1467: static void seek_interrupt(void) ! 1468: { ! 1469: #ifdef DEBUGT ! 1470: debugt("seek interrupt:"); ! 1471: #endif ! 1472: if (inr != 2 || (ST0 & 0xF8) != 0x20) { ! 1473: DPRINT("seek failed\n"); ! 1474: DRS->track = NEED_2_RECAL; ! 1475: cont->error(); ! 1476: cont->redo(); ! 1477: return; ! 1478: } ! 1479: if (DRS->track >= 0 && DRS->track != ST1 && !blind_seek){ ! 1480: #ifdef DCL_DEBUG ! 1481: if (DP->flags & FD_DEBUG){ ! 1482: DPRINT("clearing NEWCHANGE flag because of effective seek\n"); ! 1483: DPRINT("jiffies=%ld\n", jiffies); ! 1484: } ! 1485: #endif ! 1486: CLEARF(FD_DISK_NEWCHANGE); /* effective seek */ ! 1487: DRS->select_date = jiffies; ! 1488: } ! 1489: DRS->track = ST1; ! 1490: floppy_ready(); ! 1491: } ! 1492: ! 1493: static void check_wp(void) ! 1494: { ! 1495: if (TESTF(FD_VERIFY)) { ! 1496: /* check write protection */ ! 1497: output_byte(FD_GETSTATUS); ! 1498: output_byte(UNIT(current_drive)); ! 1499: if (result() != 1){ ! 1500: FDCS->reset = 1; ! 1501: return; ! 1502: } ! 1503: CLEARF(FD_VERIFY); ! 1504: CLEARF(FD_NEED_TWADDLE); ! 1505: #ifdef DCL_DEBUG ! 1506: if (DP->flags & FD_DEBUG){ ! 1507: DPRINT("checking whether disk is write protected\n"); ! 1508: DPRINT("wp=%x\n",ST3 & 0x40); ! 1509: } ! 1510: #endif ! 1511: if (!(ST3 & 0x40)) ! 1512: SETF(FD_DISK_WRITABLE); ! 1513: else ! 1514: CLEARF(FD_DISK_WRITABLE); ! 1515: } ! 1516: } ! 1517: ! 1518: static void seek_floppy(void) ! 1519: { ! 1520: int track; ! 1521: ! 1522: blind_seek=0; ! 1523: ! 1524: #ifdef DCL_DEBUG ! 1525: if (DP->flags & FD_DEBUG){ ! 1526: DPRINT("calling disk change from seek\n"); ! 1527: } ! 1528: #endif ! 1529: ! 1530: if (!TESTF(FD_DISK_NEWCHANGE) && ! 1531: disk_change(current_drive) && ! 1532: (raw_cmd->flags & FD_RAW_NEED_DISK)){ ! 1533: /* the media changed flag should be cleared after the seek. ! 1534: * If it isn't, this means that there is really no disk in ! 1535: * the drive. ! 1536: */ ! 1537: SETF(FD_DISK_CHANGED); ! 1538: cont->done(0); ! 1539: cont->redo(); ! 1540: return; ! 1541: } ! 1542: if (DRS->track <= NEED_1_RECAL){ ! 1543: recalibrate_floppy(); ! 1544: return; ! 1545: } else if (TESTF(FD_DISK_NEWCHANGE) && ! 1546: (raw_cmd->flags & FD_RAW_NEED_DISK) && ! 1547: (DRS->track <= NO_TRACK || DRS->track == raw_cmd->track)) { ! 1548: /* we seek to clear the media-changed condition. Does anybody ! 1549: * know a more elegant way, which works on all drives? */ ! 1550: if (raw_cmd->track) ! 1551: track = raw_cmd->track - 1; ! 1552: else { ! 1553: if (DP->flags & FD_SILENT_DCL_CLEAR){ ! 1554: set_dor(fdc, ~(0x10 << UNIT(current_drive)), 0); ! 1555: blind_seek = 1; ! 1556: raw_cmd->flags |= FD_RAW_NEED_SEEK; ! 1557: } ! 1558: track = 1; ! 1559: } ! 1560: } else { ! 1561: check_wp(); ! 1562: if (raw_cmd->track != DRS->track && ! 1563: (raw_cmd->flags & FD_RAW_NEED_SEEK)) ! 1564: track = raw_cmd->track; ! 1565: else { ! 1566: setup_rw_floppy(); ! 1567: return; ! 1568: } ! 1569: } ! 1570: ! 1571: SET_INTR(seek_interrupt); ! 1572: output_byte(FD_SEEK); ! 1573: output_byte(UNIT(current_drive)); ! 1574: LAST_OUT(track); ! 1575: #ifdef DEBUGT ! 1576: debugt("seek command:"); ! 1577: #endif ! 1578: } ! 1579: ! 1580: static void recal_interrupt(void) ! 1581: { ! 1582: #ifdef DEBUGT ! 1583: debugt("recal interrupt:"); ! 1584: #endif ! 1585: if (inr !=2) ! 1586: FDCS->reset = 1; ! 1587: else if (ST0 & ST0_ECE) { ! 1588: switch(DRS->track){ ! 1589: case NEED_1_RECAL: ! 1590: #ifdef DEBUGT ! 1591: debugt("recal interrupt need 1 recal:"); ! 1592: #endif ! 1593: /* after a second recalibrate, we still haven't ! 1594: * reached track 0. Probably no drive. Raise an ! 1595: * error, as failing immediately might upset ! 1596: * computers possessed by the Devil :-) */ ! 1597: cont->error(); ! 1598: cont->redo(); ! 1599: return; ! 1600: case NEED_2_RECAL: ! 1601: #ifdef DEBUGT ! 1602: debugt("recal interrupt need 2 recal:"); ! 1603: #endif ! 1604: /* If we already did a recalibrate, ! 1605: * and we are not at track 0, this ! 1606: * means we have moved. (The only way ! 1607: * not to move at recalibration is to ! 1608: * be already at track 0.) Clear the ! 1609: * new change flag */ ! 1610: #ifdef DCL_DEBUG ! 1611: if (DP->flags & FD_DEBUG){ ! 1612: DPRINT("clearing NEWCHANGE flag because of second recalibrate\n"); ! 1613: } ! 1614: #endif ! 1615: ! 1616: CLEARF(FD_DISK_NEWCHANGE); ! 1617: DRS->select_date = jiffies; ! 1618: /* fall through */ ! 1619: default: ! 1620: #ifdef DEBUGT ! 1621: debugt("recal interrupt default:"); ! 1622: #endif ! 1623: /* Recalibrate moves the head by at ! 1624: * most 80 steps. If after one ! 1625: * recalibrate we don't have reached ! 1626: * track 0, this might mean that we ! 1627: * started beyond track 80. Try ! 1628: * again. */ ! 1629: DRS->track = NEED_1_RECAL; ! 1630: break; ! 1631: } ! 1632: } else ! 1633: DRS->track = ST1; ! 1634: floppy_ready(); ! 1635: } ! 1636: ! 1637: static void print_result(char *message, int inr) ! 1638: { ! 1639: int i; ! 1640: ! 1641: DPRINT("%s ", message); ! 1642: if (inr >= 0) ! 1643: for (i=0; i<inr; i++) ! 1644: printk("repl[%d]=%x ", i, reply_buffer[i]); ! 1645: printk("\n"); ! 1646: } ! 1647: ! 1648: /* interrupt handler */ ! 1649: void floppy_interrupt(int irq, void *dev_id, struct pt_regs * regs) ! 1650: { ! 1651: void (*handler)(void) = DEVICE_INTR; ! 1652: int do_print; ! 1653: ! 1654: lasthandler = handler; ! 1655: interruptjiffies = jiffies; ! 1656: ! 1657: fd_disable_dma(); ! 1658: floppy_enable_hlt(); ! 1659: CLEAR_INTR; ! 1660: if (fdc >= N_FDC || FDCS->address == -1){ ! 1661: /* we don't even know which FDC is the culprit */ ! 1662: printk("DOR0=%x\n", fdc_state[0].dor); ! 1663: printk("floppy interrupt on bizarre fdc %d\n",fdc); ! 1664: printk("handler=%p\n", handler); ! 1665: is_alive("bizarre fdc"); ! 1666: return; ! 1667: } ! 1668: ! 1669: FDCS->reset = 0; ! 1670: /* We have to clear the reset flag here, because apparently on boxes ! 1671: * with level triggered interrupts (PS/2, Sparc, ...), it is needed to ! 1672: * emit SENSEI's to clear the interrupt line. And FDCS->reset blocks the ! 1673: * emission of the SENSEI's. ! 1674: * It is OK to emit floppy commands because we are in an interrupt ! 1675: * handler here, and thus we have to fear no interference of other ! 1676: * activity. ! 1677: */ ! 1678: ! 1679: do_print = !handler && print_unex && !initialising; ! 1680: ! 1681: inr = result(); ! 1682: if(do_print) ! 1683: print_result("unexpected interrupt", inr); ! 1684: if (inr == 0){ ! 1685: int max_sensei = 4; ! 1686: do { ! 1687: output_byte(FD_SENSEI); ! 1688: inr = result(); ! 1689: if(do_print) ! 1690: print_result("sensei", inr); ! 1691: max_sensei--; ! 1692: } while ((ST0 & 0x83) != UNIT(current_drive) && inr == 2 && max_sensei); ! 1693: } ! 1694: if (handler) { ! 1695: if(intr_count >= 2) { ! 1696: /* expected interrupt */ ! 1697: floppy_tq.routine = (void *)(void *) handler; ! 1698: queue_task_irq(&floppy_tq, &tq_immediate); ! 1699: mark_bh(IMMEDIATE_BH); ! 1700: } else ! 1701: handler(); ! 1702: } else ! 1703: FDCS->reset = 1; ! 1704: is_alive("normal interrupt end"); ! 1705: } ! 1706: ! 1707: static void recalibrate_floppy(void) ! 1708: { ! 1709: #ifdef DEBUGT ! 1710: debugt("recalibrate floppy:"); ! 1711: #endif ! 1712: SET_INTR(recal_interrupt); ! 1713: output_byte(FD_RECALIBRATE); ! 1714: LAST_OUT(UNIT(current_drive)); ! 1715: } ! 1716: ! 1717: /* ! 1718: * Must do 4 FD_SENSEIs after reset because of ``drive polling''. ! 1719: */ ! 1720: static void reset_interrupt(void) ! 1721: { ! 1722: #ifdef DEBUGT ! 1723: debugt("reset interrupt:"); ! 1724: #endif ! 1725: result(); /* get the status ready for set_fdc */ ! 1726: if (FDCS->reset) { ! 1727: printk("reset set in interrupt, calling %p\n", cont->error); ! 1728: cont->error(); /* a reset just after a reset. BAD! */ ! 1729: } ! 1730: cont->redo(); ! 1731: } ! 1732: ! 1733: /* ! 1734: * reset is done by pulling bit 2 of DOR low for a while (old FDCs), ! 1735: * or by setting the self clearing bit 7 of STATUS (newer FDCs) ! 1736: */ ! 1737: static void reset_fdc(void) ! 1738: { ! 1739: SET_INTR(reset_interrupt); ! 1740: FDCS->reset = 0; ! 1741: reset_fdc_info(0); ! 1742: ! 1743: /* Pseudo-DMA may intercept 'reset finished' interrupt. */ ! 1744: /* Irrelevant for systems with true DMA (i386). */ ! 1745: fd_disable_dma(); ! 1746: ! 1747: if (FDCS->version >= FDC_82072A) ! 1748: fd_outb(0x80 | (FDCS->dtr &3), FD_STATUS); ! 1749: else { ! 1750: fd_outb(FDCS->dor & ~0x04, FD_DOR); ! 1751: udelay(FD_RESET_DELAY); ! 1752: fd_outb(FDCS->dor, FD_DOR); ! 1753: } ! 1754: } ! 1755: ! 1756: void show_floppy(void) ! 1757: { ! 1758: int i; ! 1759: ! 1760: printk("\n"); ! 1761: printk("floppy driver state\n"); ! 1762: printk("-------------------\n"); ! 1763: printk("now=%ld last interrupt=%d last called handler=%p\n", ! 1764: jiffies, interruptjiffies, lasthandler); ! 1765: ! 1766: ! 1767: #ifdef FLOPPY_SANITY_CHECK ! 1768: printk("timeout_message=%s\n", timeout_message); ! 1769: printk("last output bytes:\n"); ! 1770: for (i=0; i < OLOGSIZE; i++) ! 1771: printk("%2x %2x %ld\n", ! 1772: output_log[(i+output_log_pos) % OLOGSIZE].data, ! 1773: output_log[(i+output_log_pos) % OLOGSIZE].status, ! 1774: output_log[(i+output_log_pos) % OLOGSIZE].jiffies); ! 1775: printk("last result at %d\n", resultjiffies); ! 1776: printk("last redo_fd_request at %d\n", lastredo); ! 1777: for (i=0; i<resultsize; i++){ ! 1778: printk("%2x ", reply_buffer[i]); ! 1779: } ! 1780: printk("\n"); ! 1781: #endif ! 1782: ! 1783: printk("status=%x\n", fd_inb(FD_STATUS)); ! 1784: printk("fdc_busy=%d\n", fdc_busy); ! 1785: if (DEVICE_INTR) ! 1786: printk("DEVICE_INTR=%p\n", DEVICE_INTR); ! 1787: if (floppy_tq.sync) ! 1788: printk("floppy_tq.routine=%p\n", floppy_tq.routine); ! 1789: if (fd_timer.prev) ! 1790: printk("fd_timer.function=%p\n", fd_timer.function); ! 1791: if (fd_timeout.prev){ ! 1792: printk("timer_table=%p\n",fd_timeout.function); ! 1793: printk("expires=%ld\n",fd_timeout.expires-jiffies); ! 1794: printk("now=%ld\n",jiffies); ! 1795: } ! 1796: printk("cont=%p\n", cont); ! 1797: printk("CURRENT=%p\n", CURRENT); ! 1798: printk("command_status=%d\n", command_status); ! 1799: printk("\n"); ! 1800: } ! 1801: ! 1802: static void floppy_shutdown(void) ! 1803: { ! 1804: if (!initialising) ! 1805: show_floppy(); ! 1806: cancel_activity(); ! 1807: sti(); ! 1808: ! 1809: floppy_enable_hlt(); ! 1810: fd_disable_dma(); ! 1811: /* avoid dma going to a random drive after shutdown */ ! 1812: ! 1813: if (!initialising) ! 1814: DPRINT("floppy timeout called\n"); ! 1815: FDCS->reset = 1; ! 1816: if (cont){ ! 1817: cont->done(0); ! 1818: cont->redo(); /* this will recall reset when needed */ ! 1819: } else { ! 1820: printk("no cont in shutdown!\n"); ! 1821: process_fd_request(); ! 1822: } ! 1823: is_alive("floppy shutdown"); ! 1824: } ! 1825: /*typedef void (*timeout_fn)(unsigned long);*/ ! 1826: ! 1827: /* start motor, check media-changed condition and write protection */ ! 1828: static int start_motor(void (*function)(void) ) ! 1829: { ! 1830: int mask, data; ! 1831: ! 1832: mask = 0xfc; ! 1833: data = UNIT(current_drive); ! 1834: if (!(raw_cmd->flags & FD_RAW_NO_MOTOR)){ ! 1835: if (!(FDCS->dor & (0x10 << UNIT(current_drive)))){ ! 1836: set_debugt(); ! 1837: /* no read since this drive is running */ ! 1838: DRS->first_read_date = 0; ! 1839: /* note motor start time if motor is not yet running */ ! 1840: DRS->spinup_date = jiffies; ! 1841: data |= (0x10 << UNIT(current_drive)); ! 1842: } ! 1843: } else ! 1844: if (FDCS->dor & (0x10 << UNIT(current_drive))) ! 1845: mask &= ~(0x10 << UNIT(current_drive)); ! 1846: ! 1847: /* starts motor and selects floppy */ ! 1848: del_timer(motor_off_timer + current_drive); ! 1849: set_dor(fdc, mask, data); ! 1850: ! 1851: /* wait_for_completion also schedules reset if needed. */ ! 1852: return(wait_for_completion(DRS->select_date+DP->select_delay, ! 1853: (timeout_fn) function)); ! 1854: } ! 1855: ! 1856: static void floppy_ready(void) ! 1857: { ! 1858: CHECK_RESET; ! 1859: if (start_motor(floppy_ready)) return; ! 1860: if (fdc_dtr()) return; ! 1861: ! 1862: #ifdef DCL_DEBUG ! 1863: if (DP->flags & FD_DEBUG){ ! 1864: DPRINT("calling disk change from floppy_ready\n"); ! 1865: } ! 1866: #endif ! 1867: ! 1868: if (!(raw_cmd->flags & FD_RAW_NO_MOTOR) && ! 1869: disk_change(current_drive) && ! 1870: !DP->select_delay) ! 1871: twaddle(); /* this clears the dcl on certain drive/controller ! 1872: * combinations */ ! 1873: ! 1874: if (raw_cmd->flags & (FD_RAW_NEED_SEEK | FD_RAW_NEED_DISK)){ ! 1875: perpendicular_mode(); ! 1876: fdc_specify(); /* must be done here because of hut, hlt ... */ ! 1877: seek_floppy(); ! 1878: } else ! 1879: setup_rw_floppy(); ! 1880: } ! 1881: ! 1882: static void floppy_start(void) ! 1883: { ! 1884: reschedule_timeout(CURRENTD, "floppy start", 0); ! 1885: ! 1886: scandrives(); ! 1887: #ifdef DCL_DEBUG ! 1888: if (DP->flags & FD_DEBUG){ ! 1889: DPRINT("setting NEWCHANGE in floppy_start\n"); ! 1890: } ! 1891: #endif ! 1892: SETF(FD_DISK_NEWCHANGE); ! 1893: floppy_ready(); ! 1894: } ! 1895: ! 1896: /* ! 1897: * ======================================================================== ! 1898: * here ends the bottom half. Exported routines are: ! 1899: * floppy_start, floppy_off, floppy_ready, lock_fdc, unlock_fdc, set_fdc, ! 1900: * start_motor, reset_fdc, reset_fdc_info, interpret_errors. ! 1901: * Initialization also uses output_byte, result, set_dor, floppy_interrupt ! 1902: * and set_dor. ! 1903: * ======================================================================== ! 1904: */ ! 1905: /* ! 1906: * General purpose continuations. ! 1907: * ============================== ! 1908: */ ! 1909: ! 1910: static void do_wakeup(void) ! 1911: { ! 1912: reschedule_timeout(MAXTIMEOUT, "do wakeup", 0); ! 1913: cont = 0; ! 1914: command_status += 2; ! 1915: wake_up(&command_done); ! 1916: } ! 1917: ! 1918: static struct cont_t wakeup_cont={ ! 1919: empty, ! 1920: do_wakeup, ! 1921: empty, ! 1922: (done_f)empty ! 1923: }; ! 1924: ! 1925: ! 1926: static struct cont_t intr_cont={ ! 1927: empty, ! 1928: process_fd_request, ! 1929: empty, ! 1930: (done_f) empty ! 1931: }; ! 1932: ! 1933: static int wait_til_done(void (*handler)(void), int interruptible) ! 1934: { ! 1935: int ret; ! 1936: unsigned long flags; ! 1937: ! 1938: floppy_tq.routine = (void *)(void *) handler; ! 1939: queue_task(&floppy_tq, &tq_immediate); ! 1940: mark_bh(IMMEDIATE_BH); ! 1941: INT_OFF; ! 1942: while(command_status < 2 && NO_SIGNAL){ ! 1943: is_alive("wait_til_done"); ! 1944: if (interruptible) ! 1945: interruptible_sleep_on(&command_done); ! 1946: else ! 1947: sleep_on(&command_done); ! 1948: } ! 1949: if (command_status < 2){ ! 1950: cancel_activity(); ! 1951: cont = &intr_cont; ! 1952: reset_fdc(); ! 1953: INT_ON; ! 1954: return -EINTR; ! 1955: } ! 1956: INT_ON; ! 1957: ! 1958: if (FDCS->reset) ! 1959: command_status = FD_COMMAND_ERROR; ! 1960: if (command_status == FD_COMMAND_OKAY) ! 1961: ret=0; ! 1962: else ! 1963: ret=-EIO; ! 1964: command_status = FD_COMMAND_NONE; ! 1965: return ret; ! 1966: } ! 1967: ! 1968: static void generic_done(int result) ! 1969: { ! 1970: command_status = result; ! 1971: cont = &wakeup_cont; ! 1972: } ! 1973: ! 1974: static void generic_success(void) ! 1975: { ! 1976: cont->done(1); ! 1977: } ! 1978: ! 1979: static void generic_failure(void) ! 1980: { ! 1981: cont->done(0); ! 1982: } ! 1983: ! 1984: static void success_and_wakeup(void) ! 1985: { ! 1986: generic_success(); ! 1987: cont->redo(); ! 1988: } ! 1989: ! 1990: ! 1991: /* ! 1992: * formatting and rw support. ! 1993: * ========================== ! 1994: */ ! 1995: ! 1996: static int next_valid_format(void) ! 1997: { ! 1998: int probed_format; ! 1999: ! 2000: probed_format = DRS->probed_format; ! 2001: while(1){ ! 2002: if (probed_format >= 8 || ! 2003: !DP->autodetect[probed_format]){ ! 2004: DRS->probed_format = 0; ! 2005: return 1; ! 2006: } ! 2007: if (floppy_type[DP->autodetect[probed_format]].sect){ ! 2008: DRS->probed_format = probed_format; ! 2009: return 0; ! 2010: } ! 2011: probed_format++; ! 2012: } ! 2013: } ! 2014: ! 2015: static void bad_flp_intr(void) ! 2016: { ! 2017: if (probing){ ! 2018: DRS->probed_format++; ! 2019: if (!next_valid_format()) ! 2020: return; ! 2021: } ! 2022: (*errors)++; ! 2023: INFBOUND(DRWE->badness, *errors); ! 2024: if (*errors > DP->max_errors.abort) ! 2025: cont->done(0); ! 2026: if (*errors > DP->max_errors.reset) ! 2027: FDCS->reset = 1; ! 2028: else if (*errors > DP->max_errors.recal) ! 2029: DRS->track = NEED_2_RECAL; ! 2030: } ! 2031: ! 2032: static void set_floppy(kdev_t device) ! 2033: { ! 2034: if (TYPE(device)) ! 2035: _floppy = TYPE(device) + floppy_type; ! 2036: else ! 2037: _floppy = current_type[ DRIVE(device) ]; ! 2038: } ! 2039: ! 2040: /* ! 2041: * formatting support. ! 2042: * =================== ! 2043: */ ! 2044: static void format_interrupt(void) ! 2045: { ! 2046: switch (interpret_errors()){ ! 2047: case 1: ! 2048: cont->error(); ! 2049: case 2: ! 2050: break; ! 2051: case 0: ! 2052: cont->done(1); ! 2053: } ! 2054: cont->redo(); ! 2055: } ! 2056: ! 2057: #define CODE2SIZE (ssize = ((1 << SIZECODE) + 3) >> 2) ! 2058: #define FM_MODE(x,y) ((y) & ~(((x)->rate & 0x80) >>1)) ! 2059: #define CT(x) ((x) | 0x40) ! 2060: static void setup_format_params(int track) ! 2061: { ! 2062: struct fparm { ! 2063: unsigned char track,head,sect,size; ! 2064: } *here = (struct fparm *)floppy_track_buffer; ! 2065: int il,n; ! 2066: int count,head_shift,track_shift; ! 2067: ! 2068: raw_cmd = &default_raw_cmd; ! 2069: raw_cmd->track = track; ! 2070: ! 2071: raw_cmd->flags = FD_RAW_WRITE | FD_RAW_INTR | FD_RAW_SPIN | ! 2072: FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK; ! 2073: raw_cmd->rate = _floppy->rate & 0x43; ! 2074: raw_cmd->cmd_count = NR_F; ! 2075: COMMAND = FM_MODE(_floppy,FD_FORMAT); ! 2076: DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy,format_req.head); ! 2077: F_SIZECODE = FD_SIZECODE(_floppy); ! 2078: F_SECT_PER_TRACK = _floppy->sect << 2 >> F_SIZECODE; ! 2079: F_GAP = _floppy->fmt_gap; ! 2080: F_FILL = FD_FILL_BYTE; ! 2081: ! 2082: raw_cmd->kernel_data = floppy_track_buffer; ! 2083: raw_cmd->length = 4 * F_SECT_PER_TRACK; ! 2084: ! 2085: /* allow for about 30ms for data transport per track */ ! 2086: head_shift = (F_SECT_PER_TRACK + 5) / 6; ! 2087: ! 2088: /* a ``cylinder'' is two tracks plus a little stepping time */ ! 2089: track_shift = 2 * head_shift + 3; ! 2090: ! 2091: /* position of logical sector 1 on this track */ ! 2092: n = (track_shift * format_req.track + head_shift * format_req.head) ! 2093: % F_SECT_PER_TRACK; ! 2094: ! 2095: /* determine interleave */ ! 2096: il = 1; ! 2097: if (_floppy->fmt_gap < 0x22) ! 2098: il++; ! 2099: ! 2100: /* initialize field */ ! 2101: for (count = 0; count < F_SECT_PER_TRACK; ++count) { ! 2102: here[count].track = format_req.track; ! 2103: here[count].head = format_req.head; ! 2104: here[count].sect = 0; ! 2105: here[count].size = F_SIZECODE; ! 2106: } ! 2107: /* place logical sectors */ ! 2108: for (count = 1; count <= F_SECT_PER_TRACK; ++count) { ! 2109: here[n].sect = count; ! 2110: n = (n+il) % F_SECT_PER_TRACK; ! 2111: if (here[n].sect) { /* sector busy, find next free sector */ ! 2112: ++n; ! 2113: if (n>= F_SECT_PER_TRACK) { ! 2114: n-=F_SECT_PER_TRACK; ! 2115: while (here[n].sect) ++n; ! 2116: } ! 2117: } ! 2118: } ! 2119: } ! 2120: ! 2121: static void redo_format(void) ! 2122: { ! 2123: buffer_track = -1; ! 2124: setup_format_params(format_req.track << STRETCH(_floppy)); ! 2125: floppy_start(); ! 2126: #ifdef DEBUGT ! 2127: debugt("queue format request"); ! 2128: #endif ! 2129: } ! 2130: ! 2131: static struct cont_t format_cont={ ! 2132: format_interrupt, ! 2133: redo_format, ! 2134: bad_flp_intr, ! 2135: generic_done }; ! 2136: ! 2137: static int do_format(kdev_t device, struct format_descr *tmp_format_req) ! 2138: { ! 2139: int ret; ! 2140: int drive=DRIVE(device); ! 2141: ! 2142: LOCK_FDC(drive,1); ! 2143: set_floppy(device); ! 2144: if (!_floppy || ! 2145: _floppy->track > DP->tracks || ! 2146: tmp_format_req->track >= _floppy->track || ! 2147: tmp_format_req->head >= _floppy->head || ! 2148: (_floppy->sect << 2) % (1 << FD_SIZECODE(_floppy)) || ! 2149: !_floppy->fmt_gap) { ! 2150: process_fd_request(); ! 2151: return -EINVAL; ! 2152: } ! 2153: format_req = *tmp_format_req; ! 2154: format_errors = 0; ! 2155: cont = &format_cont; ! 2156: errors = &format_errors; ! 2157: IWAIT(redo_format); ! 2158: process_fd_request(); ! 2159: return ret; ! 2160: } ! 2161: ! 2162: /* ! 2163: * Buffer read/write and support ! 2164: * ============================= ! 2165: */ ! 2166: ! 2167: /* new request_done. Can handle physical sectors which are smaller than a ! 2168: * logical buffer */ ! 2169: static void request_done(int uptodate) ! 2170: { ! 2171: int block; ! 2172: ! 2173: probing = 0; ! 2174: reschedule_timeout(MAXTIMEOUT, "request done %d", uptodate); ! 2175: ! 2176: if (!CURRENT){ ! 2177: DPRINT("request list destroyed in floppy request done\n"); ! 2178: return; ! 2179: } ! 2180: ! 2181: if (uptodate){ ! 2182: /* maintain values for invalidation on geometry ! 2183: * change */ ! 2184: block = current_count_sectors + CURRENT->sector; ! 2185: INFBOUND(DRS->maxblock, block); ! 2186: if (block > _floppy->sect) ! 2187: DRS->maxtrack = 1; ! 2188: ! 2189: /* unlock chained buffers */ ! 2190: while (current_count_sectors && CURRENT && ! 2191: current_count_sectors >= CURRENT->current_nr_sectors){ ! 2192: current_count_sectors -= CURRENT->current_nr_sectors; ! 2193: CURRENT->nr_sectors -= CURRENT->current_nr_sectors; ! 2194: CURRENT->sector += CURRENT->current_nr_sectors; ! 2195: end_request(1); ! 2196: } ! 2197: if (current_count_sectors && CURRENT){ ! 2198: /* "unlock" last subsector */ ! 2199: CURRENT->buffer += current_count_sectors <<9; ! 2200: CURRENT->current_nr_sectors -= current_count_sectors; ! 2201: CURRENT->nr_sectors -= current_count_sectors; ! 2202: CURRENT->sector += current_count_sectors; ! 2203: return; ! 2204: } ! 2205: ! 2206: if (current_count_sectors && !CURRENT) ! 2207: DPRINT("request list destroyed in floppy request done\n"); ! 2208: ! 2209: } else { ! 2210: if (CURRENT->cmd == WRITE) { ! 2211: /* record write error information */ ! 2212: DRWE->write_errors++; ! 2213: if (DRWE->write_errors == 1) { ! 2214: DRWE->first_error_sector = CURRENT->sector; ! 2215: DRWE->first_error_generation = DRS->generation; ! 2216: } ! 2217: DRWE->last_error_sector = CURRENT->sector; ! 2218: DRWE->last_error_generation = DRS->generation; ! 2219: } ! 2220: end_request(0); ! 2221: } ! 2222: } ! 2223: ! 2224: /* Interrupt handler evaluating the result of the r/w operation */ ! 2225: static void rw_interrupt(void) ! 2226: { ! 2227: int nr_sectors, ssize, eoc; ! 2228: ! 2229: if (!DRS->first_read_date) ! 2230: DRS->first_read_date = jiffies; ! 2231: ! 2232: nr_sectors = 0; ! 2233: CODE2SIZE; ! 2234: ! 2235: if(ST1 & ST1_EOC) ! 2236: eoc = 1; ! 2237: else ! 2238: eoc = 0; ! 2239: nr_sectors = ((R_TRACK-TRACK)*_floppy->head+R_HEAD-HEAD) * ! 2240: _floppy->sect + ((R_SECTOR-SECTOR+eoc) << SIZECODE >> 2) - ! 2241: (sector_t % _floppy->sect) % ssize; ! 2242: ! 2243: #ifdef FLOPPY_SANITY_CHECK ! 2244: if (nr_sectors > current_count_sectors + ssize - ! 2245: (current_count_sectors + sector_t) % ssize + ! 2246: sector_t % ssize){ ! 2247: DPRINT("long rw: %x instead of %lx\n", ! 2248: nr_sectors, current_count_sectors); ! 2249: printk("rs=%d s=%d\n", R_SECTOR, SECTOR); ! 2250: printk("rh=%d h=%d\n", R_HEAD, HEAD); ! 2251: printk("rt=%d t=%d\n", R_TRACK, TRACK); ! 2252: printk("spt=%d st=%d ss=%d\n", SECT_PER_TRACK, ! 2253: sector_t, ssize); ! 2254: } ! 2255: #endif ! 2256: INFBOUND(nr_sectors,0); ! 2257: SUPBOUND(current_count_sectors, nr_sectors); ! 2258: ! 2259: switch (interpret_errors()){ ! 2260: case 2: ! 2261: cont->redo(); ! 2262: return; ! 2263: case 1: ! 2264: if (!current_count_sectors){ ! 2265: cont->error(); ! 2266: cont->redo(); ! 2267: return; ! 2268: } ! 2269: break; ! 2270: case 0: ! 2271: if (!current_count_sectors){ ! 2272: cont->redo(); ! 2273: return; ! 2274: } ! 2275: current_type[current_drive] = _floppy; ! 2276: floppy_sizes[TOMINOR(current_drive) ]= _floppy->size>>1; ! 2277: break; ! 2278: } ! 2279: ! 2280: if (probing) { ! 2281: if (DP->flags & FTD_MSG) ! 2282: DPRINT("Auto-detected floppy type %s in fd%d\n", ! 2283: _floppy->name,current_drive); ! 2284: current_type[current_drive] = _floppy; ! 2285: floppy_sizes[TOMINOR(current_drive)] = _floppy->size >> 1; ! 2286: probing = 0; ! 2287: } ! 2288: ! 2289: if (CT(COMMAND) != FD_READ || ! 2290: raw_cmd->kernel_data == CURRENT->buffer){ ! 2291: /* transfer directly from buffer */ ! 2292: cont->done(1); ! 2293: } else if (CT(COMMAND) == FD_READ){ ! 2294: buffer_track = raw_cmd->track; ! 2295: buffer_drive = current_drive; ! 2296: INFBOUND(buffer_max, nr_sectors + sector_t); ! 2297: } ! 2298: cont->redo(); ! 2299: } ! 2300: ! 2301: /* Compute maximal contiguous buffer size. */ ! 2302: static int buffer_chain_size(void) ! 2303: { ! 2304: struct buffer_head *bh; ! 2305: int size; ! 2306: char *base; ! 2307: ! 2308: base = CURRENT->buffer; ! 2309: size = CURRENT->current_nr_sectors << 9; ! 2310: bh = CURRENT->bh; ! 2311: ! 2312: if (bh){ ! 2313: bh = bh->b_reqnext; ! 2314: while (bh && bh->b_data == base + size){ ! 2315: size += bh->b_size; ! 2316: bh = bh->b_reqnext; ! 2317: } ! 2318: } ! 2319: return size >> 9; ! 2320: } ! 2321: ! 2322: /* Compute the maximal transfer size */ ! 2323: static int transfer_size(int ssize, int max_sector, int max_size) ! 2324: { ! 2325: SUPBOUND(max_sector, sector_t + max_size); ! 2326: ! 2327: /* alignment */ ! 2328: max_sector -= (max_sector % _floppy->sect) % ssize; ! 2329: ! 2330: /* transfer size, beginning not aligned */ ! 2331: current_count_sectors = max_sector - sector_t ; ! 2332: ! 2333: return max_sector; ! 2334: } ! 2335: ! 2336: /* ! 2337: * Move data from/to the track buffer to/from the buffer cache. ! 2338: */ ! 2339: static void copy_buffer(int ssize, int max_sector, int max_sector_2) ! 2340: { ! 2341: int remaining; /* number of transferred 512-byte sectors */ ! 2342: struct buffer_head *bh; ! 2343: char *buffer, *dma_buffer; ! 2344: int size; ! 2345: ! 2346: max_sector = transfer_size(ssize, ! 2347: minimum(max_sector, max_sector_2), ! 2348: CURRENT->nr_sectors); ! 2349: ! 2350: if (current_count_sectors <= 0 && CT(COMMAND) == FD_WRITE && ! 2351: buffer_max > sector_t + CURRENT->nr_sectors) ! 2352: current_count_sectors = minimum(buffer_max - sector_t, ! 2353: CURRENT->nr_sectors); ! 2354: ! 2355: remaining = current_count_sectors << 9; ! 2356: #ifdef FLOPPY_SANITY_CHECK ! 2357: if ((remaining >> 9) > CURRENT->nr_sectors && ! 2358: CT(COMMAND) == FD_WRITE){ ! 2359: DPRINT("in copy buffer\n"); ! 2360: printk("current_count_sectors=%ld\n", current_count_sectors); ! 2361: printk("remaining=%d\n", remaining >> 9); ! 2362: printk("CURRENT->nr_sectors=%ld\n",CURRENT->nr_sectors); ! 2363: printk("CURRENT->current_nr_sectors=%ld\n", ! 2364: CURRENT->current_nr_sectors); ! 2365: printk("max_sector=%d\n", max_sector); ! 2366: printk("ssize=%d\n", ssize); ! 2367: } ! 2368: #endif ! 2369: ! 2370: buffer_max = maximum(max_sector, buffer_max); ! 2371: ! 2372: dma_buffer = floppy_track_buffer + ((sector_t - buffer_min) << 9); ! 2373: ! 2374: bh = CURRENT->bh; ! 2375: size = CURRENT->current_nr_sectors << 9; ! 2376: buffer = CURRENT->buffer; ! 2377: ! 2378: while (remaining > 0){ ! 2379: SUPBOUND(size, remaining); ! 2380: #ifdef FLOPPY_SANITY_CHECK ! 2381: if (dma_buffer + size > ! 2382: floppy_track_buffer + (max_buffer_sectors << 10) || ! 2383: dma_buffer < floppy_track_buffer){ ! 2384: DPRINT("buffer overrun in copy buffer %d\n", ! 2385: (int) ((floppy_track_buffer - dma_buffer) >>9)); ! 2386: printk("sector_t=%d buffer_min=%d\n", ! 2387: sector_t, buffer_min); ! 2388: printk("current_count_sectors=%ld\n", ! 2389: current_count_sectors); ! 2390: if (CT(COMMAND) == FD_READ) ! 2391: printk("read\n"); ! 2392: if (CT(COMMAND) == FD_READ) ! 2393: printk("write\n"); ! 2394: break; ! 2395: } ! 2396: if (((unsigned long)buffer) % 512) ! 2397: DPRINT("%p buffer not aligned\n", buffer); ! 2398: #endif ! 2399: if (CT(COMMAND) == FD_READ) ! 2400: memcpy(buffer, dma_buffer, size); ! 2401: else ! 2402: memcpy(dma_buffer, buffer, size); ! 2403: remaining -= size; ! 2404: if (!remaining) ! 2405: break; ! 2406: ! 2407: dma_buffer += size; ! 2408: bh = bh->b_reqnext; ! 2409: #ifdef FLOPPY_SANITY_CHECK ! 2410: if (!bh){ ! 2411: DPRINT("bh=null in copy buffer after copy\n"); ! 2412: break; ! 2413: } ! 2414: #endif ! 2415: size = bh->b_size; ! 2416: buffer = bh->b_data; ! 2417: } ! 2418: #ifdef FLOPPY_SANITY_CHECK ! 2419: if (remaining){ ! 2420: if (remaining > 0) ! 2421: max_sector -= remaining >> 9; ! 2422: DPRINT("weirdness: remaining %d\n", remaining>>9); ! 2423: } ! 2424: #endif ! 2425: } ! 2426: ! 2427: /* ! 2428: * Formulate a read/write request. ! 2429: * this routine decides where to load the data (directly to buffer, or to ! 2430: * tmp floppy area), how much data to load (the size of the buffer, the whole ! 2431: * track, or a single sector) ! 2432: * All floppy_track_buffer handling goes in here. If we ever add track buffer ! 2433: * allocation on the fly, it should be done here. No other part should need ! 2434: * modification. ! 2435: */ ! 2436: ! 2437: static int make_raw_rw_request(void) ! 2438: { ! 2439: int aligned_sector_t; ! 2440: int max_sector, max_size, tracksize, ssize; ! 2441: ! 2442: set_fdc(DRIVE(CURRENT->rq_dev)); ! 2443: ! 2444: raw_cmd = &default_raw_cmd; ! 2445: raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_DISK | FD_RAW_NEED_DISK | ! 2446: FD_RAW_NEED_SEEK; ! 2447: raw_cmd->cmd_count = NR_RW; ! 2448: if (CURRENT->cmd == READ){ ! 2449: raw_cmd->flags |= FD_RAW_READ; ! 2450: COMMAND = FM_MODE(_floppy,FD_READ); ! 2451: } else if (CURRENT->cmd == WRITE){ ! 2452: raw_cmd->flags |= FD_RAW_WRITE; ! 2453: COMMAND = FM_MODE(_floppy,FD_WRITE); ! 2454: } else { ! 2455: DPRINT("make_raw_rw_request: unknown command\n"); ! 2456: return 0; ! 2457: } ! 2458: ! 2459: max_sector = _floppy->sect * _floppy->head; ! 2460: ! 2461: TRACK = CURRENT->sector / max_sector; ! 2462: sector_t = CURRENT->sector % max_sector; ! 2463: if (_floppy->track && TRACK >= _floppy->track) ! 2464: return 0; ! 2465: HEAD = sector_t / _floppy->sect; ! 2466: ! 2467: if (((_floppy->stretch & FD_SWAPSIDES) || TESTF(FD_NEED_TWADDLE)) && ! 2468: sector_t < _floppy->sect) ! 2469: max_sector = _floppy->sect; ! 2470: ! 2471: /* 2M disks have phantom sectors on the first track */ ! 2472: if ((_floppy->rate & FD_2M) && (!TRACK) && (!HEAD)){ ! 2473: max_sector = 2 * _floppy->sect / 3; ! 2474: if (sector_t >= max_sector){ ! 2475: current_count_sectors = minimum(_floppy->sect - sector_t, ! 2476: CURRENT->nr_sectors); ! 2477: return 1; ! 2478: } ! 2479: SIZECODE = 2; ! 2480: } else ! 2481: SIZECODE = FD_SIZECODE(_floppy); ! 2482: raw_cmd->rate = _floppy->rate & 0x43; ! 2483: if ((_floppy->rate & FD_2M) && ! 2484: (TRACK || HEAD) && ! 2485: raw_cmd->rate == 2) ! 2486: raw_cmd->rate = 1; ! 2487: ! 2488: if (SIZECODE) ! 2489: SIZECODE2 = 0xff; ! 2490: else ! 2491: SIZECODE2 = 0x80; ! 2492: raw_cmd->track = TRACK << STRETCH(_floppy); ! 2493: DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy,HEAD); ! 2494: GAP = _floppy->gap; ! 2495: CODE2SIZE; ! 2496: SECT_PER_TRACK = _floppy->sect << 2 >> SIZECODE; ! 2497: SECTOR = ((sector_t % _floppy->sect) << 2 >> SIZECODE) + 1; ! 2498: tracksize = _floppy->sect - _floppy->sect % ssize; ! 2499: if (tracksize < _floppy->sect){ ! 2500: SECT_PER_TRACK ++; ! 2501: if (tracksize <= sector_t % _floppy->sect) ! 2502: SECTOR--; ! 2503: while (tracksize <= sector_t % _floppy->sect){ ! 2504: while(tracksize + ssize > _floppy->sect){ ! 2505: SIZECODE--; ! 2506: ssize >>= 1; ! 2507: } ! 2508: SECTOR++; SECT_PER_TRACK ++; ! 2509: tracksize += ssize; ! 2510: } ! 2511: max_sector = HEAD * _floppy->sect + tracksize; ! 2512: } else if (!TRACK && !HEAD && !(_floppy->rate & FD_2M) && probing) ! 2513: max_sector = _floppy->sect; ! 2514: ! 2515: aligned_sector_t = sector_t - (sector_t % _floppy->sect) % ssize; ! 2516: max_size = CURRENT->nr_sectors; ! 2517: if ((raw_cmd->track == buffer_track) && ! 2518: (current_drive == buffer_drive) && ! 2519: (sector_t >= buffer_min) && (sector_t < buffer_max)) { ! 2520: /* data already in track buffer */ ! 2521: if (CT(COMMAND) == FD_READ) { ! 2522: copy_buffer(1, max_sector, buffer_max); ! 2523: return 1; ! 2524: } ! 2525: } else if (aligned_sector_t != sector_t || CURRENT->nr_sectors < ssize){ ! 2526: if (CT(COMMAND) == FD_WRITE){ ! 2527: if (sector_t + CURRENT->nr_sectors > ssize && ! 2528: sector_t + CURRENT->nr_sectors < ssize + ssize) ! 2529: max_size = ssize + ssize; ! 2530: else ! 2531: max_size = ssize; ! 2532: } ! 2533: raw_cmd->flags &= ~FD_RAW_WRITE; ! 2534: raw_cmd->flags |= FD_RAW_READ; ! 2535: COMMAND = FM_MODE(_floppy,FD_READ); ! 2536: } else if ((unsigned long)CURRENT->buffer < MAX_DMA_ADDRESS) { ! 2537: unsigned long dma_limit; ! 2538: int direct, indirect; ! 2539: ! 2540: indirect= transfer_size(ssize,max_sector,max_buffer_sectors*2) - ! 2541: sector_t; ! 2542: ! 2543: /* ! 2544: * Do NOT use minimum() here---MAX_DMA_ADDRESS is 64 bits wide ! 2545: * on a 64 bit machine! ! 2546: */ ! 2547: max_size = buffer_chain_size(); ! 2548: dma_limit = (MAX_DMA_ADDRESS - ((unsigned long) CURRENT->buffer)) >> 9; ! 2549: if ((unsigned long) max_size > dma_limit) { ! 2550: max_size = dma_limit; ! 2551: } ! 2552: /* 64 kb boundaries */ ! 2553: if (CROSS_64KB(CURRENT->buffer, max_size << 9)) ! 2554: max_size = (K_64 - ((long) CURRENT->buffer) % K_64)>>9; ! 2555: direct = transfer_size(ssize,max_sector,max_size) - sector_t; ! 2556: /* ! 2557: * We try to read tracks, but if we get too many errors, we ! 2558: * go back to reading just one sector at a time. ! 2559: * ! 2560: * This means we should be able to read a sector even if there ! 2561: * are other bad sectors on this track. ! 2562: */ ! 2563: if (!direct || ! 2564: (indirect * 2 > direct * 3 && ! 2565: *errors < DP->max_errors.read_track && ! 2566: /*!TESTF(FD_NEED_TWADDLE) &&*/ ! 2567: ((!probing || (DP->read_track&(1<<DRS->probed_format)))))){ ! 2568: max_size = CURRENT->nr_sectors; ! 2569: } else { ! 2570: raw_cmd->kernel_data = CURRENT->buffer; ! 2571: raw_cmd->length = current_count_sectors << 9; ! 2572: if (raw_cmd->length == 0){ ! 2573: DPRINT("zero dma transfer attempted from make_raw_request\n"); ! 2574: DPRINT("indirect=%d direct=%d sector_t=%d", ! 2575: indirect, direct, sector_t); ! 2576: return 0; ! 2577: } ! 2578: return 2; ! 2579: } ! 2580: } ! 2581: ! 2582: if (CT(COMMAND) == FD_READ) ! 2583: max_size = max_sector; /* unbounded */ ! 2584: ! 2585: /* claim buffer track if needed */ ! 2586: if (buffer_track != raw_cmd->track || /* bad track */ ! 2587: buffer_drive !=current_drive || /* bad drive */ ! 2588: sector_t > buffer_max || ! 2589: sector_t < buffer_min || ! 2590: ((CT(COMMAND) == FD_READ || ! 2591: (aligned_sector_t == sector_t && CURRENT->nr_sectors >= ssize))&& ! 2592: max_sector > 2 * max_buffer_sectors + buffer_min && ! 2593: max_size + sector_t > 2 * max_buffer_sectors + buffer_min) ! 2594: /* not enough space */){ ! 2595: buffer_track = -1; ! 2596: buffer_drive = current_drive; ! 2597: buffer_max = buffer_min = aligned_sector_t; ! 2598: } ! 2599: raw_cmd->kernel_data = floppy_track_buffer + ! 2600: ((aligned_sector_t-buffer_min)<<9); ! 2601: ! 2602: if (CT(COMMAND) == FD_WRITE){ ! 2603: /* copy write buffer to track buffer. ! 2604: * if we get here, we know that the write ! 2605: * is either aligned or the data already in the buffer ! 2606: * (buffer will be overwritten) */ ! 2607: #ifdef FLOPPY_SANITY_CHECK ! 2608: if (sector_t != aligned_sector_t && buffer_track == -1) ! 2609: DPRINT("internal error offset !=0 on write\n"); ! 2610: #endif ! 2611: buffer_track = raw_cmd->track; ! 2612: buffer_drive = current_drive; ! 2613: copy_buffer(ssize, max_sector, 2*max_buffer_sectors+buffer_min); ! 2614: } else ! 2615: transfer_size(ssize, max_sector, ! 2616: 2*max_buffer_sectors+buffer_min-aligned_sector_t); ! 2617: ! 2618: /* round up current_count_sectors to get dma xfer size */ ! 2619: raw_cmd->length = sector_t+current_count_sectors-aligned_sector_t; ! 2620: raw_cmd->length = ((raw_cmd->length -1)|(ssize-1))+1; ! 2621: raw_cmd->length <<= 9; ! 2622: #ifdef FLOPPY_SANITY_CHECK ! 2623: if ((raw_cmd->length < current_count_sectors << 9) || ! 2624: (raw_cmd->kernel_data != CURRENT->buffer && ! 2625: CT(COMMAND) == FD_WRITE && ! 2626: (aligned_sector_t + (raw_cmd->length >> 9) > buffer_max || ! 2627: aligned_sector_t < buffer_min)) || ! 2628: raw_cmd->length % (128 << SIZECODE) || ! 2629: raw_cmd->length <= 0 || current_count_sectors <= 0){ ! 2630: DPRINT("fractionary current count b=%lx s=%lx\n", ! 2631: raw_cmd->length, current_count_sectors); ! 2632: if (raw_cmd->kernel_data != CURRENT->buffer) ! 2633: printk("addr=%d, length=%ld\n", ! 2634: (int) ((raw_cmd->kernel_data - ! 2635: floppy_track_buffer) >> 9), ! 2636: current_count_sectors); ! 2637: printk("st=%d ast=%d mse=%d msi=%d\n", ! 2638: sector_t, aligned_sector_t, max_sector, max_size); ! 2639: printk("ssize=%x SIZECODE=%d\n", ssize, SIZECODE); ! 2640: printk("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n", ! 2641: COMMAND, SECTOR, HEAD, TRACK); ! 2642: printk("buffer drive=%d\n", buffer_drive); ! 2643: printk("buffer track=%d\n", buffer_track); ! 2644: printk("buffer_min=%d\n", buffer_min); ! 2645: printk("buffer_max=%d\n", buffer_max); ! 2646: return 0; ! 2647: } ! 2648: ! 2649: if (raw_cmd->kernel_data != CURRENT->buffer){ ! 2650: if (raw_cmd->kernel_data < floppy_track_buffer || ! 2651: current_count_sectors < 0 || ! 2652: raw_cmd->length < 0 || ! 2653: raw_cmd->kernel_data + raw_cmd->length > ! 2654: floppy_track_buffer + (max_buffer_sectors << 10)){ ! 2655: DPRINT("buffer overrun in schedule dma\n"); ! 2656: printk("sector_t=%d buffer_min=%d current_count=%ld\n", ! 2657: sector_t, buffer_min, ! 2658: raw_cmd->length >> 9); ! 2659: printk("current_count_sectors=%ld\n", ! 2660: current_count_sectors); ! 2661: if (CT(COMMAND) == FD_READ) ! 2662: printk("read\n"); ! 2663: if (CT(COMMAND) == FD_READ) ! 2664: printk("write\n"); ! 2665: return 0; ! 2666: } ! 2667: } else if (raw_cmd->length > CURRENT->nr_sectors << 9 || ! 2668: current_count_sectors > CURRENT->nr_sectors){ ! 2669: DPRINT("buffer overrun in direct transfer\n"); ! 2670: return 0; ! 2671: } else if (raw_cmd->length < current_count_sectors << 9){ ! 2672: DPRINT("more sectors than bytes\n"); ! 2673: printk("bytes=%ld\n", raw_cmd->length >> 9); ! 2674: printk("sectors=%ld\n", current_count_sectors); ! 2675: } ! 2676: if (raw_cmd->length == 0){ ! 2677: DPRINT("zero dma transfer attempted from make_raw_request\n"); ! 2678: return 0; ! 2679: } ! 2680: #endif ! 2681: return 2; ! 2682: } ! 2683: ! 2684: static void redo_fd_request(void) ! 2685: { ! 2686: #define REPEAT {request_done(0); continue; } ! 2687: kdev_t device; ! 2688: int tmp; ! 2689: ! 2690: lastredo = jiffies; ! 2691: if (current_drive < N_DRIVE) ! 2692: floppy_off(current_drive); ! 2693: ! 2694: if (CURRENT && CURRENT->rq_status == RQ_INACTIVE){ ! 2695: CLEAR_INTR; ! 2696: unlock_fdc(); ! 2697: return; ! 2698: } ! 2699: ! 2700: while(1){ ! 2701: if (!CURRENT) { ! 2702: CLEAR_INTR; ! 2703: unlock_fdc(); ! 2704: return; ! 2705: } ! 2706: if (MAJOR(CURRENT->rq_dev) != MAJOR_NR) ! 2707: panic(DEVICE_NAME ": request list destroyed"); ! 2708: if (CURRENT->bh && !buffer_locked(CURRENT->bh)) ! 2709: panic(DEVICE_NAME ": block not locked"); ! 2710: ! 2711: device = CURRENT->rq_dev; ! 2712: set_fdc(DRIVE(device)); ! 2713: reschedule_timeout(CURRENTD, "redo fd request", 0); ! 2714: ! 2715: set_floppy(device); ! 2716: raw_cmd = & default_raw_cmd; ! 2717: raw_cmd->flags = 0; ! 2718: if (start_motor(redo_fd_request)) return; ! 2719: disk_change(current_drive); ! 2720: if (test_bit(current_drive, &fake_change) || ! 2721: TESTF(FD_DISK_CHANGED)){ ! 2722: DPRINT("disk absent or changed during operation\n"); ! 2723: REPEAT; ! 2724: } ! 2725: if (!_floppy) { /* Autodetection */ ! 2726: if (!probing){ ! 2727: DRS->probed_format = 0; ! 2728: if (next_valid_format()){ ! 2729: DPRINT("no autodetectable formats\n"); ! 2730: _floppy = NULL; ! 2731: REPEAT; ! 2732: } ! 2733: } ! 2734: probing = 1; ! 2735: _floppy = floppy_type+DP->autodetect[DRS->probed_format]; ! 2736: } else ! 2737: probing = 0; ! 2738: errors = & (CURRENT->errors); ! 2739: tmp = make_raw_rw_request(); ! 2740: if (tmp < 2){ ! 2741: request_done(tmp); ! 2742: continue; ! 2743: } ! 2744: ! 2745: if (TESTF(FD_NEED_TWADDLE)) ! 2746: twaddle(); ! 2747: floppy_tq.routine = (void *)(void *) floppy_start; ! 2748: queue_task(&floppy_tq, &tq_immediate); ! 2749: mark_bh(IMMEDIATE_BH); ! 2750: #ifdef DEBUGT ! 2751: debugt("queue fd request"); ! 2752: #endif ! 2753: return; ! 2754: } ! 2755: #undef REPEAT ! 2756: } ! 2757: ! 2758: static struct cont_t rw_cont={ ! 2759: rw_interrupt, ! 2760: redo_fd_request, ! 2761: bad_flp_intr, ! 2762: request_done }; ! 2763: ! 2764: static struct tq_struct request_tq = ! 2765: { 0, 0, (void *) (void *) redo_fd_request, 0 }; ! 2766: ! 2767: static void process_fd_request(void) ! 2768: { ! 2769: cont = &rw_cont; ! 2770: queue_task(&request_tq, &tq_immediate); ! 2771: mark_bh(IMMEDIATE_BH); ! 2772: } ! 2773: ! 2774: static void do_fd_request(void) ! 2775: { ! 2776: sti(); ! 2777: if (fdc_busy){ ! 2778: /* fdc busy, this new request will be treated when the ! 2779: current one is done */ ! 2780: is_alive("do fd request, old request running"); ! 2781: return; ! 2782: } ! 2783: lock_fdc(MAXTIMEOUT,0); ! 2784: process_fd_request(); ! 2785: is_alive("do fd request"); ! 2786: } ! 2787: ! 2788: static struct cont_t poll_cont={ ! 2789: success_and_wakeup, ! 2790: floppy_ready, ! 2791: generic_failure, ! 2792: generic_done }; ! 2793: ! 2794: static int poll_drive(int interruptible, int flag) ! 2795: { ! 2796: int ret; ! 2797: /* no auto-sense, just clear dcl */ ! 2798: raw_cmd = &default_raw_cmd; ! 2799: raw_cmd->flags= flag; ! 2800: raw_cmd->track=0; ! 2801: raw_cmd->cmd_count=0; ! 2802: cont = &poll_cont; ! 2803: #ifdef DCL_DEBUG ! 2804: if (DP->flags & FD_DEBUG){ ! 2805: DPRINT("setting NEWCHANGE in poll_drive\n"); ! 2806: } ! 2807: #endif ! 2808: SETF(FD_DISK_NEWCHANGE); ! 2809: WAIT(floppy_ready); ! 2810: return ret; ! 2811: } ! 2812: ! 2813: /* ! 2814: * User triggered reset ! 2815: * ==================== ! 2816: */ ! 2817: ! 2818: static void reset_intr(void) ! 2819: { ! 2820: printk("weird, reset interrupt called\n"); ! 2821: } ! 2822: ! 2823: static struct cont_t reset_cont={ ! 2824: reset_intr, ! 2825: success_and_wakeup, ! 2826: generic_failure, ! 2827: generic_done }; ! 2828: ! 2829: static int user_reset_fdc(int drive, int arg, int interruptible) ! 2830: { ! 2831: int ret; ! 2832: ! 2833: ret=0; ! 2834: LOCK_FDC(drive,interruptible); ! 2835: if (arg == FD_RESET_ALWAYS) ! 2836: FDCS->reset=1; ! 2837: if (FDCS->reset){ ! 2838: cont = &reset_cont; ! 2839: WAIT(reset_fdc); ! 2840: } ! 2841: process_fd_request(); ! 2842: return ret; ! 2843: } ! 2844: ! 2845: /* ! 2846: * Misc Ioctl's and support ! 2847: * ======================== ! 2848: */ ! 2849: static int fd_copyout(void *param, const void *address, int size) ! 2850: { ! 2851: int ret; ! 2852: ! 2853: ECALL(verify_area(VERIFY_WRITE,param,size)); ! 2854: memcpy_tofs(param,(void *) address, size); ! 2855: return 0; ! 2856: } ! 2857: ! 2858: static int fd_copyin(void *param, void *address, int size) ! 2859: { ! 2860: int ret; ! 2861: ! 2862: ECALL(verify_area(VERIFY_READ,param,size)); ! 2863: memcpy_fromfs((void *) address, param, size); ! 2864: return 0; ! 2865: } ! 2866: ! 2867: #define COPYOUT(x) ECALL(fd_copyout((void *)param, &(x), sizeof(x))) ! 2868: #define COPYIN(x) ECALL(fd_copyin((void *)param, &(x), sizeof(x))) ! 2869: ! 2870: static inline const char *drive_name(int type, int drive) ! 2871: { ! 2872: struct floppy_struct *floppy; ! 2873: ! 2874: if (type) ! 2875: floppy = floppy_type + type; ! 2876: else { ! 2877: if (UDP->native_format) ! 2878: floppy = floppy_type + UDP->native_format; ! 2879: else ! 2880: return "(null)"; ! 2881: } ! 2882: if (floppy->name) ! 2883: return floppy->name; ! 2884: else ! 2885: return "(null)"; ! 2886: } ! 2887: ! 2888: ! 2889: /* raw commands */ ! 2890: static void raw_cmd_done(int flag) ! 2891: { ! 2892: int i; ! 2893: ! 2894: if (!flag) { ! 2895: raw_cmd->flags |= FD_RAW_FAILURE; ! 2896: raw_cmd->flags |= FD_RAW_HARDFAILURE; ! 2897: } else { ! 2898: raw_cmd->reply_count = inr; ! 2899: for (i=0; i< raw_cmd->reply_count; i++) ! 2900: raw_cmd->reply[i] = reply_buffer[i]; ! 2901: ! 2902: if (raw_cmd->flags & (FD_RAW_READ | FD_RAW_WRITE)) ! 2903: raw_cmd->length = fd_get_dma_residue(); ! 2904: ! 2905: if ((raw_cmd->flags & FD_RAW_SOFTFAILURE) && ! 2906: (!raw_cmd->reply_count || (raw_cmd->reply[0] & 0xc0))) ! 2907: raw_cmd->flags |= FD_RAW_FAILURE; ! 2908: ! 2909: if (disk_change(current_drive)) ! 2910: raw_cmd->flags |= FD_RAW_DISK_CHANGE; ! 2911: else ! 2912: raw_cmd->flags &= ~FD_RAW_DISK_CHANGE; ! 2913: if (raw_cmd->flags & FD_RAW_NO_MOTOR_AFTER) ! 2914: motor_off_callback(current_drive); ! 2915: ! 2916: if (raw_cmd->next && ! 2917: (!(raw_cmd->flags & FD_RAW_FAILURE) || ! 2918: !(raw_cmd->flags & FD_RAW_STOP_IF_FAILURE)) && ! 2919: ((raw_cmd->flags & FD_RAW_FAILURE) || ! 2920: !(raw_cmd->flags &FD_RAW_STOP_IF_SUCCESS))) { ! 2921: raw_cmd = raw_cmd->next; ! 2922: return; ! 2923: } ! 2924: } ! 2925: generic_done(flag); ! 2926: } ! 2927: ! 2928: ! 2929: static struct cont_t raw_cmd_cont={ ! 2930: success_and_wakeup, ! 2931: floppy_start, ! 2932: generic_failure, ! 2933: raw_cmd_done ! 2934: }; ! 2935: ! 2936: static inline int raw_cmd_copyout(int cmd, char *param, ! 2937: struct floppy_raw_cmd *ptr) ! 2938: { ! 2939: struct old_floppy_raw_cmd old_raw_cmd; ! 2940: int ret; ! 2941: ! 2942: while(ptr) { ! 2943: if (cmd == OLDFDRAWCMD) { ! 2944: old_raw_cmd.flags = ptr->flags; ! 2945: old_raw_cmd.data = ptr->data; ! 2946: old_raw_cmd.length = ptr->length; ! 2947: old_raw_cmd.rate = ptr->rate; ! 2948: old_raw_cmd.reply_count = ptr->reply_count; ! 2949: memcpy(old_raw_cmd.reply, ptr->reply, 7); ! 2950: COPYOUT(old_raw_cmd); ! 2951: param += sizeof(old_raw_cmd); ! 2952: } else { ! 2953: COPYOUT(*ptr); ! 2954: param += sizeof(struct floppy_raw_cmd); ! 2955: } ! 2956: ! 2957: if ((ptr->flags & FD_RAW_READ) && ptr->buffer_length){ ! 2958: if (ptr->length>=0 && ptr->length<=ptr->buffer_length) ! 2959: ECALL(fd_copyout(ptr->data, ! 2960: ptr->kernel_data, ! 2961: ptr->buffer_length - ! 2962: ptr->length)); ! 2963: } ! 2964: ptr = ptr->next; ! 2965: } ! 2966: return 0; ! 2967: } ! 2968: ! 2969: ! 2970: static void raw_cmd_free(struct floppy_raw_cmd **ptr) ! 2971: { ! 2972: struct floppy_raw_cmd *next,*this; ! 2973: ! 2974: this = *ptr; ! 2975: *ptr = 0; ! 2976: while(this) { ! 2977: if (this->buffer_length) { ! 2978: fd_dma_mem_free((unsigned long)this->kernel_data, ! 2979: this->buffer_length); ! 2980: this->buffer_length = 0; ! 2981: } ! 2982: next = this->next; ! 2983: kfree(this); ! 2984: this = next; ! 2985: } ! 2986: } ! 2987: ! 2988: ! 2989: static inline int raw_cmd_copyin(int cmd, char *param, ! 2990: struct floppy_raw_cmd **rcmd) ! 2991: { ! 2992: struct floppy_raw_cmd *ptr; ! 2993: struct old_floppy_raw_cmd old_raw_cmd; ! 2994: int ret; ! 2995: int i; ! 2996: ! 2997: *rcmd = 0; ! 2998: while(1) { ! 2999: ptr = (struct floppy_raw_cmd *) ! 3000: kmalloc(sizeof(struct floppy_raw_cmd), GFP_USER); ! 3001: if (!ptr) ! 3002: return -ENOMEM; ! 3003: *rcmd = ptr; ! 3004: if (cmd == OLDFDRAWCMD){ ! 3005: COPYIN(old_raw_cmd); ! 3006: ptr->flags = old_raw_cmd.flags; ! 3007: ptr->data = old_raw_cmd.data; ! 3008: ptr->length = old_raw_cmd.length; ! 3009: ptr->rate = old_raw_cmd.rate; ! 3010: ptr->cmd_count = old_raw_cmd.cmd_count; ! 3011: ptr->track = old_raw_cmd.track; ! 3012: ptr->phys_length = 0; ! 3013: ptr->next = 0; ! 3014: ptr->buffer_length = 0; ! 3015: memcpy(ptr->cmd, old_raw_cmd.cmd, 9); ! 3016: param += sizeof(struct old_floppy_raw_cmd); ! 3017: if (ptr->cmd_count > 9) ! 3018: return -EINVAL; ! 3019: } else { ! 3020: COPYIN(*ptr); ! 3021: ptr->next = 0; ! 3022: ptr->buffer_length = 0; ! 3023: param += sizeof(struct floppy_raw_cmd); ! 3024: if (ptr->cmd_count > 33) ! 3025: /* the command may now also take up the space ! 3026: * initially intended for the reply & the ! 3027: * reply count. Needed for long 82078 commands ! 3028: * such as RESTORE, which takes ... 17 command ! 3029: * bytes. Murphy's law #137: When you reserve ! 3030: * 16 bytes for a structure, you'll one day ! 3031: * discover that you really need 17... ! 3032: */ ! 3033: return -EINVAL; ! 3034: } ! 3035: ! 3036: for (i=0; i< 16; i++) ! 3037: ptr->reply[i] = 0; ! 3038: ptr->resultcode = 0; ! 3039: ptr->kernel_data = 0; ! 3040: ! 3041: if (ptr->flags & (FD_RAW_READ | FD_RAW_WRITE)) { ! 3042: if (ptr->length <= 0) ! 3043: return -EINVAL; ! 3044: ptr->kernel_data =(char*)fd_dma_mem_alloc(ptr->length); ! 3045: if (!ptr->kernel_data) ! 3046: return -ENOMEM; ! 3047: ptr->buffer_length = ptr->length; ! 3048: } ! 3049: if ( ptr->flags & FD_RAW_READ ) ! 3050: ECALL( verify_area( VERIFY_WRITE, ptr->data, ! 3051: ptr->length )); ! 3052: if (ptr->flags & FD_RAW_WRITE) ! 3053: ECALL(fd_copyin(ptr->data, ptr->kernel_data, ! 3054: ptr->length)); ! 3055: rcmd = & (ptr->next); ! 3056: if (!(ptr->flags & FD_RAW_MORE)) ! 3057: return 0; ! 3058: ptr->rate &= 0x43; ! 3059: } ! 3060: } ! 3061: ! 3062: ! 3063: static int raw_cmd_ioctl(int cmd, void *param) ! 3064: { ! 3065: int drive, ret, ret2; ! 3066: struct floppy_raw_cmd *my_raw_cmd; ! 3067: ! 3068: if (FDCS->rawcmd <= 1) ! 3069: FDCS->rawcmd = 1; ! 3070: for (drive= 0; drive < N_DRIVE; drive++){ ! 3071: if (FDC(drive) != fdc) ! 3072: continue; ! 3073: if (drive == current_drive){ ! 3074: if (UDRS->fd_ref > 1){ ! 3075: FDCS->rawcmd = 2; ! 3076: break; ! 3077: } ! 3078: } else if (UDRS->fd_ref){ ! 3079: FDCS->rawcmd = 2; ! 3080: break; ! 3081: } ! 3082: } ! 3083: ! 3084: if (FDCS->reset) ! 3085: return -EIO; ! 3086: ! 3087: ret = raw_cmd_copyin(cmd, param, &my_raw_cmd); ! 3088: if (ret) { ! 3089: raw_cmd_free(&my_raw_cmd); ! 3090: return ret; ! 3091: } ! 3092: ! 3093: raw_cmd = my_raw_cmd; ! 3094: cont = &raw_cmd_cont; ! 3095: ret=wait_til_done(floppy_start,1); ! 3096: #ifdef DCL_DEBUG ! 3097: if (DP->flags & FD_DEBUG){ ! 3098: DPRINT("calling disk change from raw_cmd ioctl\n"); ! 3099: } ! 3100: #endif ! 3101: ! 3102: if (ret != -EINTR && FDCS->reset) ! 3103: ret = -EIO; ! 3104: ! 3105: DRS->track = NO_TRACK; ! 3106: ! 3107: ret2 = raw_cmd_copyout(cmd, param, my_raw_cmd); ! 3108: if (!ret) ! 3109: ret = ret2; ! 3110: raw_cmd_free(&my_raw_cmd); ! 3111: return ret; ! 3112: } ! 3113: ! 3114: static int invalidate_drive(kdev_t rdev) ! 3115: { ! 3116: /* invalidate the buffer track to force a reread */ ! 3117: set_bit(DRIVE(rdev), &fake_change); ! 3118: process_fd_request(); ! 3119: check_disk_change(rdev); ! 3120: return 0; ! 3121: } ! 3122: ! 3123: ! 3124: static inline void clear_write_error(int drive) ! 3125: { ! 3126: CLEARSTRUCT(UDRWE); ! 3127: } ! 3128: ! 3129: static inline int set_geometry(unsigned int cmd, struct floppy_struct *g, ! 3130: int drive, int type, kdev_t device) ! 3131: { ! 3132: int cnt; ! 3133: ! 3134: /* sanity checking for parameters.*/ ! 3135: if (g->sect <= 0 || ! 3136: g->head <= 0 || ! 3137: g->track <= 0 || ! 3138: g->track > UDP->tracks>>STRETCH(g) || ! 3139: /* check if reserved bits are set */ ! 3140: (g->stretch&~(FD_STRETCH|FD_SWAPSIDES)) != 0) ! 3141: return -EINVAL; ! 3142: if (type){ ! 3143: if (!suser()) ! 3144: return -EPERM; ! 3145: LOCK_FDC(drive,1); ! 3146: for (cnt = 0; cnt < N_DRIVE; cnt++){ ! 3147: if (ITYPE(drive_state[cnt].fd_device) == type && ! 3148: drive_state[cnt].fd_ref) ! 3149: set_bit(drive, &fake_change); ! 3150: } ! 3151: floppy_type[type] = *g; ! 3152: floppy_type[type].name="user format"; ! 3153: for (cnt = type << 2; cnt < (type << 2) + 4; cnt++) ! 3154: floppy_sizes[cnt]= floppy_sizes[cnt+0x80]= ! 3155: floppy_type[type].size>>1; ! 3156: process_fd_request(); ! 3157: for (cnt = 0; cnt < N_DRIVE; cnt++){ ! 3158: if (ITYPE(drive_state[cnt].fd_device) == type && ! 3159: drive_state[cnt].fd_ref) ! 3160: check_disk_change( ! 3161: MKDEV(FLOPPY_MAJOR, ! 3162: drive_state[cnt].fd_device)); ! 3163: } ! 3164: } else { ! 3165: LOCK_FDC(drive,1); ! 3166: if (cmd != FDDEFPRM) ! 3167: /* notice a disk change immediately, else ! 3168: * we loose our settings immediately*/ ! 3169: CALL(poll_drive(1, FD_RAW_NEED_DISK)); ! 3170: user_params[drive] = *g; ! 3171: if (buffer_drive == drive) ! 3172: SUPBOUND(buffer_max, user_params[drive].sect); ! 3173: current_type[drive] = &user_params[drive]; ! 3174: floppy_sizes[drive] = user_params[drive].size >> 1; ! 3175: if (cmd == FDDEFPRM) ! 3176: DRS->keep_data = -1; ! 3177: else ! 3178: DRS->keep_data = 1; ! 3179: /* invalidation. Invalidate only when needed, i.e. ! 3180: * when there are already sectors in the buffer cache ! 3181: * whose number will change. This is useful, because ! 3182: * mtools often changes the geometry of the disk after ! 3183: * looking at the boot block */ ! 3184: if (DRS->maxblock > user_params[drive].sect || DRS->maxtrack) ! 3185: invalidate_drive(device); ! 3186: else ! 3187: process_fd_request(); ! 3188: } ! 3189: return 0; ! 3190: } ! 3191: ! 3192: /* handle obsolete ioctl's */ ! 3193: static struct translation_entry { ! 3194: int newcmd; ! 3195: int oldcmd; ! 3196: int oldsize; /* size of 0x00xx-style ioctl. Reflects old structures, thus ! 3197: * use numeric values. NO SIZEOFS */ ! 3198: } translation_table[]= { ! 3199: {FDCLRPRM, 0, 0}, ! 3200: {FDSETPRM, 1, 28}, ! 3201: {FDDEFPRM, 2, 28}, ! 3202: {FDGETPRM, 3, 28}, ! 3203: {FDMSGON, 4, 0}, ! 3204: {FDMSGOFF, 5, 0}, ! 3205: {FDFMTBEG, 6, 0}, ! 3206: {FDFMTTRK, 7, 12}, ! 3207: {FDFMTEND, 8, 0}, ! 3208: {FDSETEMSGTRESH, 10, 0}, ! 3209: {FDFLUSH, 11, 0}, ! 3210: {FDSETMAXERRS, 12, 20}, ! 3211: {OLDFDRAWCMD, 30, 0}, ! 3212: {FDGETMAXERRS, 14, 20}, ! 3213: {FDGETDRVTYP, 16, 16}, ! 3214: {FDSETDRVPRM, 20, 88}, ! 3215: {FDGETDRVPRM, 21, 88}, ! 3216: {FDGETDRVSTAT, 22, 52}, ! 3217: {FDPOLLDRVSTAT, 23, 52}, ! 3218: {FDRESET, 24, 0}, ! 3219: {FDGETFDCSTAT, 25, 40}, ! 3220: {FDWERRORCLR, 27, 0}, ! 3221: {FDWERRORGET, 28, 24}, ! 3222: {FDRAWCMD, 0, 0}, ! 3223: {FDEJECT, 0, 0}, ! 3224: {FDTWADDLE, 40, 0} }; ! 3225: ! 3226: static inline int normalize_0x02xx_ioctl(int *cmd, int *size) ! 3227: { ! 3228: int i; ! 3229: ! 3230: for (i=0; i < ARRAY_SIZE(translation_table); i++) { ! 3231: if ((*cmd & 0xffff) == (translation_table[i].newcmd & 0xffff)){ ! 3232: *size = _IOC_SIZE(*cmd); ! 3233: *cmd = translation_table[i].newcmd; ! 3234: if (*size > _IOC_SIZE(*cmd)) { ! 3235: printk("ioctl not yet supported\n"); ! 3236: return -EFAULT; ! 3237: } ! 3238: return 0; ! 3239: } ! 3240: } ! 3241: return -EINVAL; ! 3242: } ! 3243: ! 3244: static inline int xlate_0x00xx_ioctl(int *cmd, int *size) ! 3245: { ! 3246: int i; ! 3247: /* old ioctls' for kernels <= 1.3.33 */ ! 3248: /* When the next even release will come around, we'll start ! 3249: * warning against these. ! 3250: * When the next odd release will come around, we'll fail with ! 3251: * -EINVAL */ ! 3252: if(strcmp(system_utsname.version, "1.4.0") >= 0) ! 3253: printk("obsolete floppy ioctl %x\n", *cmd); ! 3254: if((system_utsname.version[0] == '1' && ! 3255: strcmp(system_utsname.version, "1.5.0") >= 0) || ! 3256: (system_utsname.version[0] >= '2' && ! 3257: strcmp(system_utsname.version, "2.1.0") >= 0)) ! 3258: return -EINVAL; ! 3259: for (i=0; i < ARRAY_SIZE(translation_table); i++) { ! 3260: if (*cmd == translation_table[i].oldcmd) { ! 3261: *size = translation_table[i].oldsize; ! 3262: *cmd = translation_table[i].newcmd; ! 3263: return 0; ! 3264: } ! 3265: } ! 3266: return -EINVAL; ! 3267: } ! 3268: ! 3269: static int fd_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, ! 3270: unsigned long param) ! 3271: { ! 3272: #define IOCTL_MODE_BIT 8 ! 3273: #define OPEN_WRITE_BIT 16 ! 3274: #define IOCTL_ALLOWED (filp && (filp->f_mode & IOCTL_MODE_BIT)) ! 3275: #define OUT(c,x) case c: outparam = (const char *) (x); break ! 3276: #define IN(c,x,tag) case c: *(x) = inparam. tag ; return 0 ! 3277: ! 3278: int i,drive,type; ! 3279: kdev_t device; ! 3280: int ret; ! 3281: int size; ! 3282: union inparam { ! 3283: struct floppy_struct g; /* geometry */ ! 3284: struct format_descr f; ! 3285: struct floppy_max_errors max_errors; ! 3286: struct floppy_drive_params dp; ! 3287: } inparam; /* parameters coming from user space */ ! 3288: const char *outparam; /* parameters passed back to user space */ ! 3289: ! 3290: device = inode->i_rdev; ! 3291: switch (cmd) { ! 3292: RO_IOCTLS(device,param); ! 3293: } ! 3294: type = TYPE(device); ! 3295: drive = DRIVE(device); ! 3296: ! 3297: /* convert compatibility eject ioctls into floppy eject ioctl. ! 3298: * We do this in order to provide a means to eject floppy disks before ! 3299: * installing the new fdutils package */ ! 3300: if(cmd == CDROMEJECT || /* CD-ROM eject */ ! 3301: cmd == 0x6470 /* SunOS floppy eject */) { ! 3302: DPRINT("obsolete eject ioctl\n"); ! 3303: DPRINT("please use floppycontrol --eject\n"); ! 3304: cmd = FDEJECT; ! 3305: } ! 3306: ! 3307: /* convert the old style command into a new style command */ ! 3308: if ((cmd & 0xff00) == 0x0200) { ! 3309: ECALL(normalize_0x02xx_ioctl(&cmd, &size)); ! 3310: } else if ((cmd & 0xff00) == 0x0000) { ! 3311: ECALL(xlate_0x00xx_ioctl(&cmd, &size)); ! 3312: } else ! 3313: return -EINVAL; ! 3314: ! 3315: /* permission checks */ ! 3316: if (((cmd & 0x80) && !suser()) || ! 3317: ((cmd & 0x40) && !IOCTL_ALLOWED)) ! 3318: return -EPERM; ! 3319: ! 3320: /* verify writability of result, and fail early */ ! 3321: if (_IOC_DIR(cmd) & _IOC_READ) ! 3322: ECALL(verify_area(VERIFY_WRITE,(void *) param, size)); ! 3323: ! 3324: /* copyin */ ! 3325: CLEARSTRUCT(&inparam); ! 3326: if (_IOC_DIR(cmd) & _IOC_WRITE) ! 3327: ECALL(fd_copyin((void *)param, &inparam, size)) ! 3328: ! 3329: switch (cmd) { ! 3330: case FDEJECT: ! 3331: if(UDRS->fd_ref != 1) ! 3332: /* somebody else has this drive open */ ! 3333: return -EBUSY; ! 3334: LOCK_FDC(drive,1); ! 3335: ! 3336: /* do the actual eject. Fails on ! 3337: * non-Sparc architectures */ ! 3338: ret=fd_eject(UNIT(drive)); ! 3339: ! 3340: USETF(FD_DISK_CHANGED); ! 3341: USETF(FD_VERIFY); ! 3342: process_fd_request(); ! 3343: return ret; ! 3344: case FDCLRPRM: ! 3345: LOCK_FDC(drive,1); ! 3346: current_type[drive] = NULL; ! 3347: floppy_sizes[drive] = MAX_DISK_SIZE; ! 3348: UDRS->keep_data = 0; ! 3349: return invalidate_drive(device); ! 3350: case FDSETPRM: ! 3351: case FDDEFPRM: ! 3352: return set_geometry(cmd, & inparam.g, ! 3353: drive, type, device); ! 3354: case FDGETPRM: ! 3355: LOCK_FDC(drive,1); ! 3356: CALL(poll_drive(1,0)); ! 3357: process_fd_request(); ! 3358: if (type) ! 3359: outparam = (char *) &floppy_type[type]; ! 3360: else ! 3361: outparam = (char *) current_type[drive]; ! 3362: if(!outparam) ! 3363: return -ENODEV; ! 3364: break; ! 3365: ! 3366: case FDMSGON: ! 3367: UDP->flags |= FTD_MSG; ! 3368: return 0; ! 3369: case FDMSGOFF: ! 3370: UDP->flags &= ~FTD_MSG; ! 3371: return 0; ! 3372: ! 3373: case FDFMTBEG: ! 3374: LOCK_FDC(drive,1); ! 3375: CALL(poll_drive(1, FD_RAW_NEED_DISK)); ! 3376: ret = UDRS->flags; ! 3377: process_fd_request(); ! 3378: if(ret & FD_VERIFY) ! 3379: return -ENODEV; ! 3380: if(!(ret & FD_DISK_WRITABLE)) ! 3381: return -EROFS; ! 3382: return 0; ! 3383: case FDFMTTRK: ! 3384: if (UDRS->fd_ref != 1) ! 3385: return -EBUSY; ! 3386: return do_format(device, &inparam.f); ! 3387: case FDFMTEND: ! 3388: case FDFLUSH: ! 3389: LOCK_FDC(drive,1); ! 3390: return invalidate_drive(device); ! 3391: ! 3392: case FDSETEMSGTRESH: ! 3393: UDP->max_errors.reporting = ! 3394: (unsigned short) (param & 0x0f); ! 3395: return 0; ! 3396: OUT(FDGETMAXERRS, &UDP->max_errors); ! 3397: IN(FDSETMAXERRS, &UDP->max_errors, max_errors); ! 3398: ! 3399: case FDGETDRVTYP: ! 3400: outparam = drive_name(type,drive); ! 3401: SUPBOUND(size,strlen(outparam)+1); ! 3402: break; ! 3403: ! 3404: IN(FDSETDRVPRM, UDP, dp); ! 3405: OUT(FDGETDRVPRM, UDP); ! 3406: ! 3407: case FDPOLLDRVSTAT: ! 3408: LOCK_FDC(drive,1); ! 3409: CALL(poll_drive(1, FD_RAW_NEED_DISK)); ! 3410: process_fd_request(); ! 3411: /* fall through */ ! 3412: OUT(FDGETDRVSTAT, UDRS); ! 3413: ! 3414: case FDRESET: ! 3415: return user_reset_fdc(drive, (int)param, 1); ! 3416: ! 3417: OUT(FDGETFDCSTAT,UFDCS); ! 3418: ! 3419: case FDWERRORCLR: ! 3420: CLEARSTRUCT(UDRWE); ! 3421: return 0; ! 3422: OUT(FDWERRORGET,UDRWE); ! 3423: ! 3424: case OLDFDRAWCMD: ! 3425: case FDRAWCMD: ! 3426: if (type) ! 3427: return -EINVAL; ! 3428: LOCK_FDC(drive,1); ! 3429: set_floppy(device); ! 3430: CALL(i = raw_cmd_ioctl(cmd,(void *) param)); ! 3431: process_fd_request(); ! 3432: return i; ! 3433: ! 3434: case FDTWADDLE: ! 3435: LOCK_FDC(drive,1); ! 3436: twaddle(); ! 3437: process_fd_request(); ! 3438: return 0; ! 3439: ! 3440: default: ! 3441: return -EINVAL; ! 3442: } ! 3443: ! 3444: if (_IOC_DIR(cmd) & _IOC_READ) ! 3445: return fd_copyout((void *)param, outparam, size); ! 3446: else ! 3447: return 0; ! 3448: #undef IOCTL_ALLOWED ! 3449: #undef OUT ! 3450: #undef IN ! 3451: } ! 3452: ! 3453: static void config_types(void) ! 3454: { ! 3455: int first=1; ! 3456: int drive; ! 3457: ! 3458: /* read drive info out of physical CMOS */ ! 3459: drive=0; ! 3460: if (!UDP->cmos) ! 3461: UDP->cmos= FLOPPY0_TYPE; ! 3462: drive=1; ! 3463: if (!UDP->cmos && FLOPPY1_TYPE) ! 3464: UDP->cmos = FLOPPY1_TYPE; ! 3465: ! 3466: /* XXX */ ! 3467: /* additional physical CMOS drive detection should go here */ ! 3468: ! 3469: for (drive=0; drive < N_DRIVE; drive++){ ! 3470: if (UDP->cmos >= 16) ! 3471: UDP->cmos = 0; ! 3472: if (UDP->cmos >= 0 && UDP->cmos <= NUMBER(default_drive_params)) ! 3473: memcpy((char *) UDP, ! 3474: (char *) (&default_drive_params[(int)UDP->cmos].params), ! 3475: sizeof(struct floppy_drive_params)); ! 3476: if (UDP->cmos){ ! 3477: if (first) ! 3478: printk(KERN_INFO "Floppy drive(s): "); ! 3479: else ! 3480: printk(", "); ! 3481: first=0; ! 3482: if (UDP->cmos > 0){ ! 3483: allowed_drive_mask |= 1 << drive; ! 3484: printk("fd%d is %s", drive, ! 3485: default_drive_params[(int)UDP->cmos].name); ! 3486: } else ! 3487: printk("fd%d is unknown type %d",drive, ! 3488: UDP->cmos); ! 3489: } ! 3490: } ! 3491: if (!first) ! 3492: printk("\n"); ! 3493: } ! 3494: ! 3495: static int floppy_read(struct inode * inode, struct file * filp, ! 3496: char * buf, int count) ! 3497: { ! 3498: int drive = DRIVE(inode->i_rdev); ! 3499: ! 3500: check_disk_change(inode->i_rdev); ! 3501: if (UTESTF(FD_DISK_CHANGED)) ! 3502: return -ENXIO; ! 3503: return block_read(inode, filp, buf, count); ! 3504: } ! 3505: ! 3506: static int floppy_write(struct inode * inode, struct file * filp, ! 3507: const char * buf, int count) ! 3508: { ! 3509: int block; ! 3510: int ret; ! 3511: int drive = DRIVE(inode->i_rdev); ! 3512: ! 3513: if (!UDRS->maxblock) ! 3514: UDRS->maxblock=1;/* make change detectable */ ! 3515: check_disk_change(inode->i_rdev); ! 3516: if (UTESTF(FD_DISK_CHANGED)) ! 3517: return -ENXIO; ! 3518: if (!UTESTF(FD_DISK_WRITABLE)) ! 3519: return -EROFS; ! 3520: block = (filp->f_pos + count) >> 9; ! 3521: INFBOUND(UDRS->maxblock, block); ! 3522: ret= block_write(inode, filp, buf, count); ! 3523: return ret; ! 3524: } ! 3525: ! 3526: static void floppy_release(struct inode * inode, struct file * filp) ! 3527: { ! 3528: int drive; ! 3529: ! 3530: drive = DRIVE(inode->i_rdev); ! 3531: ! 3532: if (!filp || (filp->f_mode & (2 | OPEN_WRITE_BIT))) ! 3533: /* if the file is mounted OR (writable now AND writable at ! 3534: * open time) Linus: Does this cover all cases? */ ! 3535: block_fsync(inode,filp); ! 3536: ! 3537: if (UDRS->fd_ref < 0) ! 3538: UDRS->fd_ref=0; ! 3539: else if (!UDRS->fd_ref--) { ! 3540: DPRINT("floppy_release with fd_ref == 0"); ! 3541: UDRS->fd_ref = 0; ! 3542: } ! 3543: floppy_release_irq_and_dma(); ! 3544: } ! 3545: ! 3546: /* ! 3547: * floppy_open check for aliasing (/dev/fd0 can be the same as ! 3548: * /dev/PS0 etc), and disallows simultaneous access to the same ! 3549: * drive with different device numbers. ! 3550: */ ! 3551: #define RETERR(x) do{floppy_release(inode,filp); return -(x);}while(0) ! 3552: ! 3553: static int floppy_open(struct inode * inode, struct file * filp) ! 3554: { ! 3555: int drive; ! 3556: int old_dev; ! 3557: int try; ! 3558: char *tmp; ! 3559: ! 3560: if (!filp) { ! 3561: DPRINT("Weird, open called with filp=0\n"); ! 3562: return -EIO; ! 3563: } ! 3564: ! 3565: drive = DRIVE(inode->i_rdev); ! 3566: if (drive >= N_DRIVE || ! 3567: !(allowed_drive_mask & (1 << drive)) || ! 3568: fdc_state[FDC(drive)].version == FDC_NONE) ! 3569: return -ENXIO; ! 3570: ! 3571: if (TYPE(inode->i_rdev) >= NUMBER(floppy_type)) ! 3572: return -ENXIO; ! 3573: old_dev = UDRS->fd_device; ! 3574: if (UDRS->fd_ref && old_dev != MINOR(inode->i_rdev)) ! 3575: return -EBUSY; ! 3576: ! 3577: if (!UDRS->fd_ref && (UDP->flags & FD_BROKEN_DCL)){ ! 3578: USETF(FD_DISK_CHANGED); ! 3579: USETF(FD_VERIFY); ! 3580: } ! 3581: ! 3582: if (UDRS->fd_ref == -1 || ! 3583: (UDRS->fd_ref && (filp->f_flags & O_EXCL))) ! 3584: return -EBUSY; ! 3585: ! 3586: if (floppy_grab_irq_and_dma()) ! 3587: return -EBUSY; ! 3588: ! 3589: if (filp->f_flags & O_EXCL) ! 3590: UDRS->fd_ref = -1; ! 3591: else ! 3592: UDRS->fd_ref++; ! 3593: ! 3594: if (!floppy_track_buffer){ ! 3595: /* if opening an ED drive, reserve a big buffer, ! 3596: * else reserve a small one */ ! 3597: if ((UDP->cmos == 6) || (UDP->cmos == 5)) ! 3598: try = 64; /* Only 48 actually useful */ ! 3599: else ! 3600: try = 32; /* Only 24 actually useful */ ! 3601: ! 3602: tmp=(char *)fd_dma_mem_alloc(1024 * try); ! 3603: if (!tmp) { ! 3604: try >>= 1; /* buffer only one side */ ! 3605: INFBOUND(try, 16); ! 3606: tmp= (char *)fd_dma_mem_alloc(1024*try); ! 3607: } ! 3608: if (!tmp) { ! 3609: DPRINT("Unable to allocate DMA memory\n"); ! 3610: RETERR(ENXIO); ! 3611: } ! 3612: if (floppy_track_buffer) ! 3613: fd_dma_mem_free((unsigned long)tmp,try*1024); ! 3614: else { ! 3615: buffer_min = buffer_max = -1; ! 3616: floppy_track_buffer = tmp; ! 3617: max_buffer_sectors = try; ! 3618: } ! 3619: } ! 3620: ! 3621: UDRS->fd_device = MINOR(inode->i_rdev); ! 3622: if (old_dev != -1 && old_dev != MINOR(inode->i_rdev)) { ! 3623: if (buffer_drive == drive) ! 3624: buffer_track = -1; ! 3625: invalidate_buffers(MKDEV(FLOPPY_MAJOR,old_dev)); ! 3626: } ! 3627: ! 3628: /* Allow ioctls if we have write-permissions even if read-only open */ ! 3629: if ((filp->f_mode & 2) || (permission(inode,2) == 0)) ! 3630: filp->f_mode |= IOCTL_MODE_BIT; ! 3631: if (filp->f_mode & 2) ! 3632: filp->f_mode |= OPEN_WRITE_BIT; ! 3633: ! 3634: if (UFDCS->rawcmd == 1) ! 3635: UFDCS->rawcmd = 2; ! 3636: ! 3637: if (filp->f_flags & O_NDELAY) ! 3638: return 0; ! 3639: if (filp->f_mode & 3) { ! 3640: UDRS->last_checked = 0; ! 3641: check_disk_change(inode->i_rdev); ! 3642: if (UTESTF(FD_DISK_CHANGED)) ! 3643: RETERR(ENXIO); ! 3644: } ! 3645: if ((filp->f_mode & 2) && !(UTESTF(FD_DISK_WRITABLE))) ! 3646: RETERR(EROFS); ! 3647: return 0; ! 3648: #undef RETERR ! 3649: } ! 3650: ! 3651: /* ! 3652: * Check if the disk has been changed or if a change has been faked. ! 3653: */ ! 3654: static int check_floppy_change(kdev_t dev) ! 3655: { ! 3656: int drive = DRIVE(dev); ! 3657: ! 3658: if (MAJOR(dev) != MAJOR_NR) { ! 3659: DPRINT("check_floppy_change: not a floppy\n"); ! 3660: return 0; ! 3661: } ! 3662: ! 3663: if (UTESTF(FD_DISK_CHANGED) || UTESTF(FD_VERIFY)) ! 3664: return 1; ! 3665: ! 3666: if (UDP->checkfreq < jiffies - UDRS->last_checked){ ! 3667: lock_fdc(drive,0); ! 3668: poll_drive(0,0); ! 3669: process_fd_request(); ! 3670: } ! 3671: ! 3672: if (UTESTF(FD_DISK_CHANGED) || ! 3673: UTESTF(FD_VERIFY) || ! 3674: test_bit(drive, &fake_change) || ! 3675: (!TYPE(dev) && !current_type[drive])) ! 3676: return 1; ! 3677: return 0; ! 3678: } ! 3679: ! 3680: /* revalidate the floppy disk, i.e. trigger format autodetection by reading ! 3681: * the bootblock (block 0). "Autodetection" is also needed to check whether ! 3682: * there is a disk in the drive at all... Thus we also do it for fixed ! 3683: * geometry formats */ ! 3684: static int floppy_revalidate(kdev_t dev) ! 3685: { ! 3686: #define NO_GEOM (!current_type[drive] && !TYPE(dev)) ! 3687: struct buffer_head * bh; ! 3688: int drive=DRIVE(dev); ! 3689: int cf; ! 3690: ! 3691: if (UTESTF(FD_DISK_CHANGED) || ! 3692: UTESTF(FD_VERIFY) || ! 3693: test_bit(drive, &fake_change) || ! 3694: NO_GEOM){ ! 3695: lock_fdc(drive,0); ! 3696: cf = UTESTF(FD_DISK_CHANGED) || UTESTF(FD_VERIFY); ! 3697: if (!(cf || test_bit(drive, &fake_change) || NO_GEOM)){ ! 3698: process_fd_request(); /*already done by another thread*/ ! 3699: return 0; ! 3700: } ! 3701: UDRS->maxblock = 0; ! 3702: UDRS->maxtrack = 0; ! 3703: if (buffer_drive == drive) ! 3704: buffer_track = -1; ! 3705: clear_bit(drive, &fake_change); ! 3706: UCLEARF(FD_DISK_CHANGED); ! 3707: if (cf) ! 3708: UDRS->generation++; ! 3709: if (NO_GEOM){ ! 3710: /* auto-sensing */ ! 3711: int size = floppy_blocksizes[MINOR(dev)]; ! 3712: if (!size) ! 3713: size = 1024; ! 3714: if (!(bh = getblk(dev,0,size))){ ! 3715: process_fd_request(); ! 3716: return 1; ! 3717: } ! 3718: if (bh && !buffer_uptodate(bh)) ! 3719: ll_rw_block(READ, 1, &bh); ! 3720: process_fd_request(); ! 3721: wait_on_buffer(bh); ! 3722: brelse(bh); ! 3723: return 0; ! 3724: } ! 3725: if (cf) ! 3726: poll_drive(0, FD_RAW_NEED_DISK); ! 3727: process_fd_request(); ! 3728: } ! 3729: return 0; ! 3730: } ! 3731: ! 3732: static struct file_operations floppy_fops = { ! 3733: NULL, /* lseek - default */ ! 3734: floppy_read, /* read - general block-dev read */ ! 3735: floppy_write, /* write - general block-dev write */ ! 3736: NULL, /* readdir - bad */ ! 3737: NULL, /* select */ ! 3738: fd_ioctl, /* ioctl */ ! 3739: NULL, /* mmap */ ! 3740: floppy_open, /* open */ ! 3741: floppy_release, /* release */ ! 3742: block_fsync, /* fsync */ ! 3743: NULL, /* fasync */ ! 3744: check_floppy_change, /* media_change */ ! 3745: floppy_revalidate, /* revalidate */ ! 3746: }; ! 3747: ! 3748: /* ! 3749: * Floppy Driver initialization ! 3750: * ============================= ! 3751: */ ! 3752: ! 3753: /* Determine the floppy disk controller type */ ! 3754: /* This routine was written by David C. Niemi */ ! 3755: static char get_fdc_version(void) ! 3756: { ! 3757: int r; ! 3758: ! 3759: output_byte(FD_DUMPREGS); /* 82072 and better know DUMPREGS */ ! 3760: if (FDCS->reset) ! 3761: return FDC_NONE; ! 3762: if ((r = result()) <= 0x00) ! 3763: return FDC_NONE; /* No FDC present ??? */ ! 3764: if ((r==1) && (reply_buffer[0] == 0x80)){ ! 3765: printk(KERN_INFO "FDC %d is an 8272A\n",fdc); ! 3766: return FDC_8272A; /* 8272a/765 don't know DUMPREGS */ ! 3767: } ! 3768: if (r != 10) { ! 3769: printk("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n", ! 3770: fdc, r); ! 3771: return FDC_UNKNOWN; ! 3772: } ! 3773: ! 3774: if(!fdc_configure()) { ! 3775: printk(KERN_INFO "FDC %d is an 82072\n",fdc); ! 3776: return FDC_82072; /* 82072 doesn't know CONFIGURE */ ! 3777: } ! 3778: ! 3779: output_byte(FD_PERPENDICULAR); ! 3780: if(need_more_output() == MORE_OUTPUT) { ! 3781: output_byte(0); ! 3782: } else { ! 3783: printk(KERN_INFO "FDC %d is an 82072A\n", fdc); ! 3784: return FDC_82072A; /* 82072A as found on Sparcs. */ ! 3785: } ! 3786: ! 3787: output_byte(FD_UNLOCK); ! 3788: r = result(); ! 3789: if ((r == 1) && (reply_buffer[0] == 0x80)){ ! 3790: printk(KERN_INFO "FDC %d is a pre-1991 82077\n", fdc); ! 3791: return FDC_82077_ORIG; /* Pre-1991 82077, doesn't know ! 3792: * LOCK/UNLOCK */ ! 3793: } ! 3794: if ((r != 1) || (reply_buffer[0] != 0x00)) { ! 3795: printk("FDC %d init: UNLOCK: unexpected return of %d bytes.\n", ! 3796: fdc, r); ! 3797: return FDC_UNKNOWN; ! 3798: } ! 3799: output_byte(FD_PARTID); ! 3800: r = result(); ! 3801: if (r != 1) { ! 3802: printk("FDC %d init: PARTID: unexpected return of %d bytes.\n", ! 3803: fdc, r); ! 3804: return FDC_UNKNOWN; ! 3805: } ! 3806: if (reply_buffer[0] == 0x80) { ! 3807: printk(KERN_INFO "FDC %d is a post-1991 82077\n",fdc); ! 3808: return FDC_82077; /* Revised 82077AA passes all the tests */ ! 3809: } ! 3810: switch (reply_buffer[0] >> 5) { ! 3811: case 0x0: ! 3812: /* Either a 82078-1 or a 82078SL running at 5Volt */ ! 3813: printk(KERN_INFO "FDC %d is an 82078.\n",fdc); ! 3814: return FDC_82078; ! 3815: case 0x1: ! 3816: printk(KERN_INFO "FDC %d is a 44pin 82078\n",fdc); ! 3817: return FDC_82078; ! 3818: case 0x2: ! 3819: printk(KERN_INFO "FDC %d is a S82078B\n", fdc); ! 3820: return FDC_S82078B; ! 3821: case 0x3: ! 3822: printk(KERN_INFO "FDC %d is a National Semiconductor PC87306\n", fdc); ! 3823: return FDC_87306; ! 3824: default: ! 3825: printk(KERN_INFO "FDC %d init: 82078 variant with unknown PARTID=%d.\n", ! 3826: fdc, reply_buffer[0] >> 5); ! 3827: return FDC_82078_UNKN; ! 3828: } ! 3829: } /* get_fdc_version */ ! 3830: ! 3831: /* lilo configuration */ ! 3832: ! 3833: /* we make the invert_dcl function global. One day, somebody might ! 3834: * want to centralize all thinkpad related options into one lilo option, ! 3835: * there are just so many thinkpad related quirks! */ ! 3836: void floppy_invert_dcl(int *ints,int param) ! 3837: { ! 3838: int i; ! 3839: ! 3840: for (i=0; i < ARRAY_SIZE(default_drive_params); i++){ ! 3841: if (param) ! 3842: default_drive_params[i].params.flags |= 0x80; ! 3843: else ! 3844: default_drive_params[i].params.flags &= ~0x80; ! 3845: } ! 3846: DPRINT("Configuring drives for inverted dcl\n"); ! 3847: } ! 3848: ! 3849: static void daring(int *ints,int param) ! 3850: { ! 3851: int i; ! 3852: ! 3853: for (i=0; i < ARRAY_SIZE(default_drive_params); i++){ ! 3854: if (param){ ! 3855: default_drive_params[i].params.select_delay = 0; ! 3856: default_drive_params[i].params.flags |= FD_SILENT_DCL_CLEAR; ! 3857: } else { ! 3858: default_drive_params[i].params.select_delay = 2*HZ/100; ! 3859: default_drive_params[i].params.flags &= ~FD_SILENT_DCL_CLEAR; ! 3860: } ! 3861: } ! 3862: DPRINT("Assuming %s floppy hardware\n", param ? "standard" : "broken"); ! 3863: } ! 3864: ! 3865: static void set_cmos(int *ints, int dummy) ! 3866: { ! 3867: int current_drive=0; ! 3868: ! 3869: if (ints[0] != 2){ ! 3870: DPRINT("wrong number of parameter for cmos\n"); ! 3871: return; ! 3872: } ! 3873: current_drive = ints[1]; ! 3874: if (current_drive < 0 || current_drive >= 8){ ! 3875: DPRINT("bad drive for set_cmos\n"); ! 3876: return; ! 3877: } ! 3878: if (current_drive >= 4 && !FDC2) ! 3879: FDC2 = 0x370; ! 3880: if (ints[2] <= 0 || ! 3881: (ints[2] >= NUMBER(default_drive_params) && ints[2] != 16)){ ! 3882: DPRINT("bad cmos code %d\n", ints[2]); ! 3883: return; ! 3884: } ! 3885: DP->cmos = ints[2]; ! 3886: DPRINT("setting cmos code to %d\n", ints[2]); ! 3887: } ! 3888: ! 3889: static struct param_table { ! 3890: const char *name; ! 3891: void (*fn)(int *ints, int param); ! 3892: int *var; ! 3893: int def_param; ! 3894: } config_params[]={ ! 3895: { "allowed_drive_mask", 0, &allowed_drive_mask, 0xff }, ! 3896: { "all_drives", 0, &allowed_drive_mask, 0xff }, ! 3897: { "asus_pci", 0, &allowed_drive_mask, 0x33 }, ! 3898: ! 3899: { "daring", daring, 0, 1}, ! 3900: ! 3901: { "two_fdc", 0, &FDC2, 0x370 }, ! 3902: { "one_fdc", 0, &FDC2, 0 }, ! 3903: ! 3904: { "thinkpad", floppy_invert_dcl, 0, 1 }, ! 3905: ! 3906: { "nodma", 0, &use_virtual_dma, 1 }, ! 3907: { "omnibook", 0, &use_virtual_dma, 1 }, ! 3908: { "dma", 0, &use_virtual_dma, 0 }, ! 3909: ! 3910: { "fifo_depth", 0, &fifo_depth, 0xa }, ! 3911: { "nofifo", 0, &no_fifo, 0x20 }, ! 3912: { "usefifo", 0, &no_fifo, 0 }, ! 3913: ! 3914: { "cmos", set_cmos, 0, 0 }, ! 3915: ! 3916: { "unexpected_interrupts", 0, &print_unex, 1 }, ! 3917: { "no_unexpected_interrupts", 0, &print_unex, 0 }, ! 3918: { "L40SX", 0, &print_unex, 0 } }; ! 3919: ! 3920: #define FLOPPY_SETUP ! 3921: void floppy_setup(char *str, int *ints) ! 3922: { ! 3923: int i; ! 3924: int param; ! 3925: if (str) ! 3926: for (i=0; i< ARRAY_SIZE(config_params); i++){ ! 3927: if (strcmp(str,config_params[i].name) == 0){ ! 3928: if (ints[0]) ! 3929: param = ints[1]; ! 3930: else ! 3931: param = config_params[i].def_param; ! 3932: if(config_params[i].fn) ! 3933: config_params[i].fn(ints,param); ! 3934: if(config_params[i].var) { ! 3935: DPRINT("%s=%d\n", str, param); ! 3936: *config_params[i].var = param; ! 3937: } ! 3938: return; ! 3939: } ! 3940: } ! 3941: if (str) { ! 3942: DPRINT("unknown floppy option [%s]\n", str); ! 3943: ! 3944: DPRINT("allowed options are:"); ! 3945: for (i=0; i< ARRAY_SIZE(config_params); i++) ! 3946: printk(" %s",config_params[i].name); ! 3947: printk("\n"); ! 3948: } else ! 3949: DPRINT("botched floppy option\n"); ! 3950: DPRINT("Read linux/drivers/block/README.fd\n"); ! 3951: } ! 3952: ! 3953: int floppy_init(void) ! 3954: { ! 3955: int i,unit,drive; ! 3956: int have_no_fdc= -EIO; ! 3957: ! 3958: raw_cmd = 0; ! 3959: ! 3960: if (register_blkdev(MAJOR_NR,"fd",&floppy_fops)) { ! 3961: printk("Unable to get major %d for floppy\n",MAJOR_NR); ! 3962: return -EBUSY; ! 3963: } ! 3964: ! 3965: for (i=0; i<256; i++) ! 3966: if (ITYPE(i)) ! 3967: floppy_sizes[i] = floppy_type[ITYPE(i)].size >> 1; ! 3968: else ! 3969: floppy_sizes[i] = MAX_DISK_SIZE; ! 3970: ! 3971: blk_size[MAJOR_NR] = floppy_sizes; ! 3972: blksize_size[MAJOR_NR] = floppy_blocksizes; ! 3973: blk_dev[MAJOR_NR].request_fn = DEVICE_REQUEST; ! 3974: reschedule_timeout(MAXTIMEOUT, "floppy init", MAXTIMEOUT); ! 3975: config_types(); ! 3976: ! 3977: for (i = 0; i < N_FDC; i++) { ! 3978: fdc = i; ! 3979: CLEARSTRUCT(FDCS); ! 3980: FDCS->dtr = -1; ! 3981: FDCS->dor = 0x4; ! 3982: #ifdef __sparc__ ! 3983: /*sparcs don't have a DOR reset which we can fall back on to*/ ! 3984: FDCS->version = FDC_82072A; ! 3985: #endif ! 3986: } ! 3987: ! 3988: fdc_state[0].address = FDC1; ! 3989: #if N_FDC > 1 ! 3990: fdc_state[1].address = FDC2; ! 3991: #endif ! 3992: ! 3993: if (floppy_grab_irq_and_dma()){ ! 3994: del_timer(&fd_timeout); ! 3995: blk_dev[MAJOR_NR].request_fn = NULL; ! 3996: unregister_blkdev(MAJOR_NR,"fd"); ! 3997: return -EBUSY; ! 3998: } ! 3999: ! 4000: /* initialise drive state */ ! 4001: for (drive = 0; drive < N_DRIVE; drive++) { ! 4002: CLEARSTRUCT(UDRS); ! 4003: CLEARSTRUCT(UDRWE); ! 4004: UDRS->flags = FD_VERIFY | FD_DISK_NEWCHANGE | FD_DISK_CHANGED; ! 4005: UDRS->fd_device = -1; ! 4006: floppy_track_buffer = NULL; ! 4007: max_buffer_sectors = 0; ! 4008: } ! 4009: ! 4010: for (i = 0; i < N_FDC; i++) { ! 4011: fdc = i; ! 4012: FDCS->driver_version = FD_DRIVER_VERSION; ! 4013: for (unit=0; unit<4; unit++) ! 4014: FDCS->track[unit] = 0; ! 4015: if (FDCS->address == -1) ! 4016: continue; ! 4017: FDCS->rawcmd = 2; ! 4018: if (user_reset_fdc(-1,FD_RESET_ALWAYS,0)){ ! 4019: FDCS->address = -1; ! 4020: FDCS->version = FDC_NONE; ! 4021: continue; ! 4022: } ! 4023: /* Try to determine the floppy controller type */ ! 4024: FDCS->version = get_fdc_version(); ! 4025: if (FDCS->version == FDC_NONE){ ! 4026: FDCS->address = -1; ! 4027: continue; ! 4028: } ! 4029: ! 4030: request_region(FDCS->address, 6, "floppy"); ! 4031: request_region(FDCS->address+7, 1, "floppy DIR"); ! 4032: /* address + 6 is reserved, and may be taken by IDE. ! 4033: * Unfortunately, Adaptec doesn't know this :-(, */ ! 4034: ! 4035: have_no_fdc = 0; ! 4036: /* Not all FDCs seem to be able to handle the version command ! 4037: * properly, so force a reset for the standard FDC clones, ! 4038: * to avoid interrupt garbage. ! 4039: */ ! 4040: user_reset_fdc(-1,FD_RESET_ALWAYS,0); ! 4041: } ! 4042: fdc=0; ! 4043: del_timer(&fd_timeout); ! 4044: current_drive = 0; ! 4045: floppy_release_irq_and_dma(); ! 4046: initialising=0; ! 4047: if (have_no_fdc) { ! 4048: DPRINT("no floppy controllers found\n"); ! 4049: request_tq.routine = (void *)(void *) empty; ! 4050: /* ! 4051: * When we return we may be unloaded. This little ! 4052: * trick forces the immediate_bh handler to have run ! 4053: * before we unload it, lest we cause bad things. ! 4054: */ ! 4055: mark_bh(IMMEDIATE_BH); ! 4056: schedule(); ! 4057: if (usage_count) ! 4058: floppy_release_irq_and_dma(); ! 4059: blk_dev[MAJOR_NR].request_fn = NULL; ! 4060: unregister_blkdev(MAJOR_NR,"fd"); ! 4061: } ! 4062: return have_no_fdc; ! 4063: } ! 4064: ! 4065: static int floppy_grab_irq_and_dma(void) ! 4066: { ! 4067: int i; ! 4068: unsigned long flags; ! 4069: ! 4070: INT_OFF; ! 4071: if (usage_count++){ ! 4072: INT_ON; ! 4073: return 0; ! 4074: } ! 4075: INT_ON; ! 4076: MOD_INC_USE_COUNT; ! 4077: for (i=0; i< N_FDC; i++){ ! 4078: if (fdc_state[i].address != -1){ ! 4079: fdc = i; ! 4080: reset_fdc_info(1); ! 4081: fd_outb(FDCS->dor, FD_DOR); ! 4082: } ! 4083: } ! 4084: fdc = 0; ! 4085: set_dor(0, ~0, 8); /* avoid immediate interrupt */ ! 4086: ! 4087: if (fd_request_irq()) { ! 4088: DPRINT("Unable to grab IRQ%d for the floppy driver\n", ! 4089: FLOPPY_IRQ); ! 4090: MOD_DEC_USE_COUNT; ! 4091: usage_count--; ! 4092: return -1; ! 4093: } ! 4094: if (fd_request_dma()) { ! 4095: DPRINT("Unable to grab DMA%d for the floppy driver\n", ! 4096: FLOPPY_DMA); ! 4097: fd_free_irq(); ! 4098: MOD_DEC_USE_COUNT; ! 4099: usage_count--; ! 4100: return -1; ! 4101: } ! 4102: for (fdc = 0; fdc < N_FDC; fdc++) ! 4103: if (FDCS->address != -1) ! 4104: fd_outb(FDCS->dor, FD_DOR); ! 4105: fdc = 0; ! 4106: fd_enable_irq(); ! 4107: irqdma_allocated=1; ! 4108: return 0; ! 4109: } ! 4110: ! 4111: static void floppy_release_irq_and_dma(void) ! 4112: { ! 4113: #ifdef FLOPPY_SANITY_CHECK ! 4114: int drive; ! 4115: #endif ! 4116: long tmpsize; ! 4117: unsigned long tmpaddr; ! 4118: unsigned long flags; ! 4119: ! 4120: INT_OFF; ! 4121: if (--usage_count){ ! 4122: INT_ON; ! 4123: return; ! 4124: } ! 4125: INT_ON; ! 4126: if(irqdma_allocated) ! 4127: { ! 4128: fd_disable_dma(); ! 4129: fd_free_dma(); ! 4130: fd_disable_irq(); ! 4131: fd_free_irq(); ! 4132: irqdma_allocated=0; ! 4133: } ! 4134: ! 4135: set_dor(0, ~0, 8); ! 4136: #if N_FDC > 1 ! 4137: set_dor(1, ~8, 0); ! 4138: #endif ! 4139: floppy_enable_hlt(); ! 4140: ! 4141: if (floppy_track_buffer && max_buffer_sectors) { ! 4142: tmpsize = max_buffer_sectors*1024; ! 4143: tmpaddr = (unsigned long)floppy_track_buffer; ! 4144: floppy_track_buffer = 0; ! 4145: max_buffer_sectors = 0; ! 4146: buffer_min = buffer_max = -1; ! 4147: fd_dma_mem_free(tmpaddr, tmpsize); ! 4148: } ! 4149: ! 4150: #ifdef FLOPPY_SANITY_CHECK ! 4151: #ifndef __sparc__ ! 4152: for (drive=0; drive < N_FDC * 4; drive++) ! 4153: if (motor_off_timer[drive].next) ! 4154: printk("motor off timer %d still active\n", drive); ! 4155: #endif ! 4156: ! 4157: if (fd_timeout.next) ! 4158: printk("floppy timer still active:%s\n", timeout_message); ! 4159: if (fd_timer.next) ! 4160: printk("auxiliary floppy timer still active\n"); ! 4161: if (floppy_tq.sync) ! 4162: printk("task queue still active\n"); ! 4163: #endif ! 4164: MOD_DEC_USE_COUNT; ! 4165: } ! 4166: ! 4167: ! 4168: #ifdef MODULE ! 4169: ! 4170: extern char *get_options(char *str, int *ints); ! 4171: ! 4172: char *floppy=NULL; ! 4173: ! 4174: static void parse_floppy_cfg_string(char *cfg) ! 4175: { ! 4176: char *ptr; ! 4177: int ints[11]; ! 4178: ! 4179: while(*cfg) { ! 4180: for(ptr = cfg;*cfg && *cfg != ' ' && *cfg != '\t'; cfg++); ! 4181: if(*cfg) { ! 4182: *cfg = '\0'; ! 4183: cfg++; ! 4184: } ! 4185: if(*ptr) ! 4186: floppy_setup(get_options(ptr,ints),ints); ! 4187: } ! 4188: } ! 4189: ! 4190: static void mod_setup(char *pattern, void (*setup)(char *, int *)) ! 4191: { ! 4192: unsigned long i; ! 4193: char c; ! 4194: int j; ! 4195: int match; ! 4196: char buffer[100]; ! 4197: int ints[11]; ! 4198: int length = strlen(pattern)+1; ! 4199: ! 4200: match=0; ! 4201: j=1; ! 4202: ! 4203: for (i=current->mm->env_start; i< current->mm->env_end; i ++){ ! 4204: c= get_fs_byte(i); ! 4205: if (match){ ! 4206: if (j==99) ! 4207: c='\0'; ! 4208: buffer[j] = c; ! 4209: if (!c || c == ' ' || c == '\t'){ ! 4210: if (j){ ! 4211: buffer[j] = '\0'; ! 4212: setup(get_options(buffer,ints),ints); ! 4213: } ! 4214: j=0; ! 4215: } else ! 4216: j++; ! 4217: if (!c) ! 4218: break; ! 4219: continue; ! 4220: } ! 4221: if ((!j && !c) || (j && c == pattern[j-1])) ! 4222: j++; ! 4223: else ! 4224: j=0; ! 4225: if (j==length){ ! 4226: match=1; ! 4227: j=0; ! 4228: } ! 4229: } ! 4230: } ! 4231: ! 4232: ! 4233: #ifdef __cplusplus ! 4234: extern "C" { ! 4235: #endif ! 4236: int init_module(void) ! 4237: { ! 4238: printk(KERN_INFO "inserting floppy driver for %s\n", kernel_version); ! 4239: ! 4240: if(floppy) ! 4241: parse_floppy_cfg_string(floppy); ! 4242: else ! 4243: mod_setup("floppy=", floppy_setup); ! 4244: ! 4245: return floppy_init(); ! 4246: } ! 4247: ! 4248: void cleanup_module(void) ! 4249: { ! 4250: int fdc, dummy; ! 4251: ! 4252: for (fdc=0; fdc<2; fdc++) ! 4253: if (FDCS->address != -1){ ! 4254: release_region(FDCS->address, 6); ! 4255: release_region(FDCS->address+7, 1); ! 4256: } ! 4257: ! 4258: unregister_blkdev(MAJOR_NR, "fd"); ! 4259: ! 4260: blk_dev[MAJOR_NR].request_fn = 0; ! 4261: /* eject disk, if any */ ! 4262: dummy = fd_eject(0); ! 4263: } ! 4264: ! 4265: #ifdef __cplusplus ! 4266: } ! 4267: #endif ! 4268: ! 4269: #else ! 4270: /* eject the boot floppy (if we need the drive for a different root floppy) */ ! 4271: /* This should only be called at boot time when we're sure that there's no ! 4272: * resource contention. */ ! 4273: void floppy_eject(void) ! 4274: { ! 4275: int dummy; ! 4276: if(floppy_grab_irq_and_dma()==0) ! 4277: { ! 4278: lock_fdc(MAXTIMEOUT,0); ! 4279: dummy=fd_eject(0); ! 4280: process_fd_request(); ! 4281: floppy_release_irq_and_dma(); ! 4282: } ! 4283: } ! 4284: #endif
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