include/linux/ata.h

   1
   2 /*
   3  *  Copyright 2003-2004 Red Hat, Inc.  All rights reserved.
   4  *  Copyright 2003-2004 Jeff Garzik
   5  *
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 2, or (at your option)
  10  *  any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; see the file COPYING.  If not, write to
  19  *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  *
  22  *  libata documentation is available via 'make {ps|pdf}docs',
  23  *  as Documentation/DocBook/libata.*
  24  *
  25  *  Hardware documentation available from http://www.t13.org/
  26  *
  27  */
  28
  29 #ifndef __LINUX_ATA_H__
  30 #define __LINUX_ATA_H__
  31
  32 #include <linux/types.h>
  33
  34 /* defines only for the constants which don't work well as enums */
  35 #define ATA_DMA_BOUNDARY        0xffffUL
  36 #define ATA_DMA_MASK            0xffffffffULL
  37
  38 enum {
  39         /* various global constants */
  40         ATA_MAX_DEVICES         = 2,    /* per bus/port */
  41         ATA_MAX_PRD             = 256,  /* we could make these 256/256 */
  42         ATA_SECT_SIZE           = 512,
  43         ATA_MAX_SECTORS_128     = 128,
  44         ATA_MAX_SECTORS         = 256,
  45         ATA_MAX_SECTORS_LBA48   = 65535,/* TODO: 65536? */
  46
  47         ATA_ID_WORDS            = 256,
  48         ATA_ID_SERNO            = 10,
  49         ATA_ID_FW_REV           = 23,
  50         ATA_ID_PROD             = 27,
  51         ATA_ID_OLD_PIO_MODES    = 51,
  52         ATA_ID_FIELD_VALID      = 53,
  53         ATA_ID_MWDMA_MODES      = 63,
  54         ATA_ID_PIO_MODES        = 64,
  55         ATA_ID_EIDE_DMA_MIN     = 65,
  56         ATA_ID_EIDE_PIO         = 67,
  57         ATA_ID_EIDE_PIO_IORDY   = 68,
  58         ATA_ID_UDMA_MODES       = 88,
  59         ATA_ID_MAJOR_VER        = 80,
  60         ATA_ID_PIO4             = (1 << 1),
  61
  62         ATA_ID_SERNO_LEN        = 20,
  63         ATA_ID_FW_REV_LEN       = 8,
  64         ATA_ID_PROD_LEN         = 40,
  65
  66         ATA_PCI_CTL_OFS         = 2,
  67
  68         ATA_PIO0                = (1 << 0),
  69         ATA_PIO1                = ATA_PIO0 | (1 << 1),
  70         ATA_PIO2                = ATA_PIO1 | (1 << 2),
  71         ATA_PIO3                = ATA_PIO2 | (1 << 3),
  72         ATA_PIO4                = ATA_PIO3 | (1 << 4),
  73         ATA_PIO5                = ATA_PIO4 | (1 << 5),
  74         ATA_PIO6                = ATA_PIO5 | (1 << 6),
  75
  76         ATA_SWDMA0              = (1 << 0),
  77         ATA_SWDMA1              = ATA_SWDMA0 | (1 << 1),
  78         ATA_SWDMA2              = ATA_SWDMA1 | (1 << 2),
  79
  80         ATA_SWDMA2_ONLY         = (1 << 2),
  81
  82         ATA_MWDMA0              = (1 << 0),
  83         ATA_MWDMA1              = ATA_MWDMA0 | (1 << 1),
  84         ATA_MWDMA2              = ATA_MWDMA1 | (1 << 2),
  85
  86         ATA_MWDMA12_ONLY        = (1 << 1) | (1 << 2),
  87         ATA_MWDMA2_ONLY         = (1 << 2),
  88
  89         ATA_UDMA0               = (1 << 0),
  90         ATA_UDMA1               = ATA_UDMA0 | (1 << 1),
  91         ATA_UDMA2               = ATA_UDMA1 | (1 << 2),
  92         ATA_UDMA3               = ATA_UDMA2 | (1 << 3),
  93         ATA_UDMA4               = ATA_UDMA3 | (1 << 4),
  94         ATA_UDMA5               = ATA_UDMA4 | (1 << 5),
  95         ATA_UDMA6               = ATA_UDMA5 | (1 << 6),
  96         ATA_UDMA7               = ATA_UDMA6 | (1 << 7),
  97         /* ATA_UDMA7 is just for completeness... doesn't exist (yet?).  */
  98
  99         ATA_UDMA_MASK_40C       = ATA_UDMA2,    /* udma0-2 */
 100
 101         /* DMA-related */
 102         ATA_PRD_SZ              = 8,
 103         ATA_PRD_TBL_SZ          = (ATA_MAX_PRD * ATA_PRD_SZ),
 104         ATA_PRD_EOT             = (1 << 31),    /* end-of-table flag */
 105
 106         ATA_DMA_TABLE_OFS       = 4,
 107         ATA_DMA_STATUS          = 2,
 108         ATA_DMA_CMD             = 0,
 109         ATA_DMA_WR              = (1 << 3),
 110         ATA_DMA_START           = (1 << 0),
 111         ATA_DMA_INTR            = (1 << 2),
 112         ATA_DMA_ERR             = (1 << 1),
 113         ATA_DMA_ACTIVE          = (1 << 0),
 114
 115         /* bits in ATA command block registers */
 116         ATA_HOB                 = (1 << 7),     /* LBA48 selector */
 117         ATA_NIEN                = (1 << 1),     /* disable-irq flag */
 118         ATA_LBA                 = (1 << 6),     /* LBA28 selector */
 119         ATA_DEV1                = (1 << 4),     /* Select Device 1 (slave) */
 120         ATA_DEVICE_OBS          = (1 << 7) | (1 << 5), /* obs bits in dev reg */
 121         ATA_DEVCTL_OBS          = (1 << 3),     /* obsolete bit in devctl reg */
 122         ATA_BUSY                = (1 << 7),     /* BSY status bit */
 123         ATA_DRDY                = (1 << 6),     /* device ready */
 124         ATA_DF                  = (1 << 5),     /* device fault */
 125         ATA_DRQ                 = (1 << 3),     /* data request i/o */
 126         ATA_ERR                 = (1 << 0),     /* have an error */
 127         ATA_SRST                = (1 << 2),     /* software reset */
 128         ATA_ICRC                = (1 << 7),     /* interface CRC error */
 129         ATA_UNC                 = (1 << 6),     /* uncorrectable media error */
 130         ATA_IDNF                = (1 << 4),     /* ID not found */
 131         ATA_ABORTED             = (1 << 2),     /* command aborted */
 132
 133         /* ATA command block registers */
 134         ATA_REG_DATA            = 0x00,
 135         ATA_REG_ERR             = 0x01,
 136         ATA_REG_NSECT           = 0x02,
 137         ATA_REG_LBAL            = 0x03,
 138         ATA_REG_LBAM            = 0x04,
 139         ATA_REG_LBAH            = 0x05,
 140         ATA_REG_DEVICE          = 0x06,
 141         ATA_REG_STATUS          = 0x07,
 142
 143         ATA_REG_FEATURE         = ATA_REG_ERR, /* and their aliases */
 144         ATA_REG_CMD             = ATA_REG_STATUS,
 145         ATA_REG_BYTEL           = ATA_REG_LBAM,
 146         ATA_REG_BYTEH           = ATA_REG_LBAH,
 147         ATA_REG_DEVSEL          = ATA_REG_DEVICE,
 148         ATA_REG_IRQ             = ATA_REG_NSECT,
 149
 150         /* ATA device commands */
 151         ATA_CMD_DEV_RESET       = 0x08, /* ATAPI device reset */
 152         ATA_CMD_CHK_POWER       = 0xE5, /* check power mode */
 153         ATA_CMD_STANDBY         = 0xE2, /* place in standby power mode */
 154         ATA_CMD_IDLE            = 0xE3, /* place in idle power mode */
 155         ATA_CMD_EDD             = 0x90, /* execute device diagnostic */
 156         ATA_CMD_FLUSH           = 0xE7,
 157         ATA_CMD_FLUSH_EXT       = 0xEA,
 158         ATA_CMD_ID_ATA          = 0xEC,
 159         ATA_CMD_ID_ATAPI        = 0xA1,
 160         ATA_CMD_READ            = 0xC8,
 161         ATA_CMD_READ_EXT        = 0x25,
 162         ATA_CMD_WRITE           = 0xCA,
 163         ATA_CMD_WRITE_EXT       = 0x35,
 164         ATA_CMD_WRITE_FUA_EXT   = 0x3D,
 165         ATA_CMD_FPDMA_READ      = 0x60,
 166         ATA_CMD_FPDMA_WRITE     = 0x61,
 167         ATA_CMD_PIO_READ        = 0x20,
 168         ATA_CMD_PIO_READ_EXT    = 0x24,
 169         ATA_CMD_PIO_WRITE       = 0x30,
 170         ATA_CMD_PIO_WRITE_EXT   = 0x34,
 171         ATA_CMD_READ_MULTI      = 0xC4,
 172         ATA_CMD_READ_MULTI_EXT  = 0x29,
 173         ATA_CMD_WRITE_MULTI     = 0xC5,
 174         ATA_CMD_WRITE_MULTI_EXT = 0x39,
 175         ATA_CMD_WRITE_MULTI_FUA_EXT = 0xCE,
 176         ATA_CMD_SET_FEATURES    = 0xEF,
 177         ATA_CMD_SET_MULTI       = 0xC6,
 178         ATA_CMD_PACKET          = 0xA0,
 179         ATA_CMD_VERIFY          = 0x40,
 180         ATA_CMD_VERIFY_EXT      = 0x42,
 181         ATA_CMD_STANDBYNOW1     = 0xE0,
 182         ATA_CMD_IDLEIMMEDIATE   = 0xE1,
 183         ATA_CMD_SLEEP           = 0xE6,
 184         ATA_CMD_INIT_DEV_PARAMS = 0x91,
 185         ATA_CMD_READ_NATIVE_MAX = 0xF8,
 186         ATA_CMD_READ_NATIVE_MAX_EXT = 0x27,
 187         ATA_CMD_SET_MAX         = 0xF9,
 188         ATA_CMD_SET_MAX_EXT     = 0x37,
 189         ATA_CMD_READ_LOG_EXT    = 0x2f,
 190         ATA_CMD_PMP_READ        = 0xE4,
 191         ATA_CMD_PMP_WRITE       = 0xE8,
 192
 193         /* READ_LOG_EXT pages */
 194         ATA_LOG_SATA_NCQ        = 0x10,
 195
 196         /* READ/WRITE LONG (obsolete) */
 197         ATA_CMD_READ_LONG       = 0x22,
 198         ATA_CMD_READ_LONG_ONCE  = 0x23,
 199         ATA_CMD_WRITE_LONG      = 0x32,
 200         ATA_CMD_WRITE_LONG_ONCE = 0x33,
 201
 202         /* SETFEATURES stuff */
 203         SETFEATURES_XFER        = 0x03,
 204         XFER_UDMA_7             = 0x47,
 205         XFER_UDMA_6             = 0x46,
 206         XFER_UDMA_5             = 0x45,
 207         XFER_UDMA_4             = 0x44,
 208         XFER_UDMA_3             = 0x43,
 209         XFER_UDMA_2             = 0x42,
 210         XFER_UDMA_1             = 0x41,
 211         XFER_UDMA_0             = 0x40,
 212         XFER_MW_DMA_4           = 0x24, /* CFA only */
 213         XFER_MW_DMA_3           = 0x23, /* CFA only */
 214         XFER_MW_DMA_2           = 0x22,
 215         XFER_MW_DMA_1           = 0x21,
 216         XFER_MW_DMA_0           = 0x20,
 217         XFER_SW_DMA_2           = 0x12,
 218         XFER_SW_DMA_1           = 0x11,
 219         XFER_SW_DMA_0           = 0x10,
 220         XFER_PIO_6              = 0x0E, /* CFA only */
 221         XFER_PIO_5              = 0x0D, /* CFA only */
 222         XFER_PIO_4              = 0x0C,
 223         XFER_PIO_3              = 0x0B,
 224         XFER_PIO_2              = 0x0A,
 225         XFER_PIO_1              = 0x09,
 226         XFER_PIO_0              = 0x08,
 227         XFER_PIO_SLOW           = 0x00,
 228
 229         SETFEATURES_WC_ON       = 0x02, /* Enable write cache */
 230         SETFEATURES_WC_OFF      = 0x82, /* Disable write cache */
 231
 232         SETFEATURES_SPINUP      = 0x07, /* Spin-up drive */
 233
 234         SETFEATURES_SATA_ENABLE = 0x10, /* Enable use of SATA feature */
 235         SETFEATURES_SATA_DISABLE = 0x90, /* Disable use of SATA feature */
 236
 237         /* SETFEATURE Sector counts for SATA features */
 238         SATA_AN                 = 0x05,  /* Asynchronous Notification */
 239         SATA_DIPM               = 0x03,  /* Device Initiated Power Management */
 240
 241         /* ATAPI stuff */
 242         ATAPI_PKT_DMA           = (1 << 0),
 243         ATAPI_DMADIR            = (1 << 2),     /* ATAPI data dir:
 244                                                    0=to device, 1=to host */
 245         ATAPI_CDB_LEN           = 16,
 246
 247         /* PMP stuff */
 248         SATA_PMP_MAX_PORTS      = 15,
 249         SATA_PMP_CTRL_PORT      = 15,
 250
 251         SATA_PMP_GSCR_DWORDS    = 128,
 252         SATA_PMP_GSCR_PROD_ID   = 0,
 253         SATA_PMP_GSCR_REV       = 1,
 254         SATA_PMP_GSCR_PORT_INFO = 2,
 255         SATA_PMP_GSCR_ERROR     = 32,
 256         SATA_PMP_GSCR_ERROR_EN  = 33,
 257         SATA_PMP_GSCR_FEAT      = 64,
 258         SATA_PMP_GSCR_FEAT_EN   = 96,
 259
 260         SATA_PMP_PSCR_STATUS    = 0,
 261         SATA_PMP_PSCR_ERROR     = 1,
 262         SATA_PMP_PSCR_CONTROL   = 2,
 263
 264         SATA_PMP_FEAT_BIST      = (1 << 0),
 265         SATA_PMP_FEAT_PMREQ     = (1 << 1),
 266         SATA_PMP_FEAT_DYNSSC    = (1 << 2),
 267         SATA_PMP_FEAT_NOTIFY    = (1 << 3),
 268
 269         /* cable types */
 270         ATA_CBL_NONE            = 0,
 271         ATA_CBL_PATA40          = 1,
 272         ATA_CBL_PATA80          = 2,
 273         ATA_CBL_PATA40_SHORT    = 3,            /* 40 wire cable to high UDMA spec */
 274         ATA_CBL_PATA_UNK        = 4,
 275         ATA_CBL_SATA            = 5,
 276
 277         /* SATA Status and Control Registers */
 278         SCR_STATUS              = 0,
 279         SCR_ERROR               = 1,
 280         SCR_CONTROL             = 2,
 281         SCR_ACTIVE              = 3,
 282         SCR_NOTIFICATION        = 4,
 283
 284         /* SError bits */
 285         SERR_DATA_RECOVERED     = (1 << 0), /* recovered data error */
 286         SERR_COMM_RECOVERED     = (1 << 1), /* recovered comm failure */
 287         SERR_DATA               = (1 << 8), /* unrecovered data error */
 288         SERR_PERSISTENT         = (1 << 9), /* persistent data/comm error */
 289         SERR_PROTOCOL           = (1 << 10), /* protocol violation */
 290         SERR_INTERNAL           = (1 << 11), /* host internal error */
 291         SERR_PHYRDY_CHG         = (1 << 16), /* PHY RDY changed */
 292         SERR_PHY_INT_ERR        = (1 << 17), /* PHY internal error */
 293         SERR_COMM_WAKE          = (1 << 18), /* Comm wake */
 294         SERR_10B_8B_ERR         = (1 << 19), /* 10b to 8b decode error */
 295         SERR_DISPARITY          = (1 << 20), /* Disparity */
 296         SERR_CRC                = (1 << 21), /* CRC error */
 297         SERR_HANDSHAKE          = (1 << 22), /* Handshake error */
 298         SERR_LINK_SEQ_ERR       = (1 << 23), /* Link sequence error */
 299         SERR_TRANS_ST_ERROR     = (1 << 24), /* Transport state trans. error */
 300         SERR_UNRECOG_FIS        = (1 << 25), /* Unrecognized FIS */
 301         SERR_DEV_XCHG           = (1 << 26), /* device exchanged */
 302
 303         /* struct ata_taskfile flags */
 304         ATA_TFLAG_LBA48         = (1 << 0), /* enable 48-bit LBA and "HOB" */
 305         ATA_TFLAG_ISADDR        = (1 << 1), /* enable r/w to nsect/lba regs */
 306         ATA_TFLAG_DEVICE        = (1 << 2), /* enable r/w to device reg */
 307         ATA_TFLAG_WRITE         = (1 << 3), /* data dir: host->dev==1 (write) */
 308         ATA_TFLAG_LBA           = (1 << 4), /* enable LBA */
 309         ATA_TFLAG_FUA           = (1 << 5), /* enable FUA */
 310         ATA_TFLAG_POLLING       = (1 << 6), /* set nIEN to 1 and use polling */
 311 };
 312
 313 enum ata_tf_protocols {
 314         /* ATA taskfile protocols */
 315         ATA_PROT_UNKNOWN,       /* unknown/invalid */
 316         ATA_PROT_NODATA,        /* no data */
 317         ATA_PROT_PIO,           /* PIO data xfer */
 318         ATA_PROT_DMA,           /* DMA */
 319         ATA_PROT_NCQ,           /* NCQ */
 320         ATA_PROT_ATAPI,         /* packet command, PIO data xfer*/
 321         ATA_PROT_ATAPI_NODATA,  /* packet command, no data */
 322         ATA_PROT_ATAPI_DMA,     /* packet command with special DMA sauce */
 323 };
 324
 325 enum ata_ioctls {
 326         ATA_IOC_GET_IO32        = 0x309,
 327         ATA_IOC_SET_IO32        = 0x324,
 328 };
 329
 330 /* core structures */
 331
 332 struct ata_prd {
 333         u32                     addr;
 334         u32                     flags_len;
 335 };
 336
 337 struct ata_taskfile {
 338         unsigned long           flags;          /* ATA_TFLAG_xxx */
 339         u8                      protocol;       /* ATA_PROT_xxx */
 340
 341         u8                      ctl;            /* control reg */
 342
 343         u8                      hob_feature;    /* additional data */
 344         u8                      hob_nsect;      /* to support LBA48 */
 345         u8                      hob_lbal;
 346         u8                      hob_lbam;
 347         u8                      hob_lbah;
 348
 349         u8                      feature;
 350         u8                      nsect;
 351         u8                      lbal;
 352         u8                      lbam;
 353         u8                      lbah;
 354
 355         u8                      device;
 356
 357         u8                      command;        /* IO operation */
 358 };
 359
 360 #define ata_id_is_ata(id)       (((id)[0] & (1 << 15)) == 0)
 361 #define ata_id_has_lba(id)      ((id)[49] & (1 << 9))
 362 #define ata_id_has_dma(id)      ((id)[49] & (1 << 8))
 363 #define ata_id_has_ncq(id)      ((id)[76] & (1 << 8))
 364 #define ata_id_queue_depth(id)  (((id)[75] & 0x1f) + 1)
 365 #define ata_id_removeable(id)   ((id)[0] & (1 << 7))
 366 #define ata_id_has_dword_io(id) ((id)[48] & (1 << 0))
 367 #define ata_id_has_atapi_AN(id) \
 368         ( (((id)[76] != 0x0000) && ((id)[76] != 0xffff)) && \
 369           ((id)[78] & (1 << 5)) )
 370 #define ata_id_iordy_disable(id) ((id)[49] & (1 << 10))
 371 #define ata_id_has_iordy(id) ((id)[49] & (1 << 11))
 372 #define ata_id_u32(id,n)        \
 373         (((u32) (id)[(n) + 1] << 16) | ((u32) (id)[(n)]))
 374 #define ata_id_u64(id,n)        \
 375         ( ((u64) (id)[(n) + 3] << 48) | \
 376           ((u64) (id)[(n) + 2] << 32) | \
 377           ((u64) (id)[(n) + 1] << 16) | \
 378           ((u64) (id)[(n) + 0]) )
 379
 380 #define ata_id_cdb_intr(id)     (((id)[0] & 0x60) == 0x20)
 381
 382 static inline bool ata_id_has_hipm(const u16 *id)
 383 {
 384         u16 val = id[76];
 385
 386         if (val == 0 || val == 0xffff)
 387                 return false;
 388
 389         return val & (1 << 9);
 390 }
 391
 392 static inline bool ata_id_has_dipm(const u16 *id)
 393 {
 394         u16 val = id[78];
 395
 396         if (val == 0 || val == 0xffff)
 397                 return false;
 398
 399         return val & (1 << 3);
 400 }
 401
 402 static inline int ata_id_has_fua(const u16 *id)
 403 {
 404         if ((id[84] & 0xC000) != 0x4000)
 405                 return 0;
 406         return id[84] & (1 << 6);
 407 }
 408
 409 static inline int ata_id_has_flush(const u16 *id)
 410 {
 411         if ((id[83] & 0xC000) != 0x4000)
 412                 return 0;
 413         return id[83] & (1 << 12);
 414 }
 415
 416 static inline int ata_id_has_flush_ext(const u16 *id)
 417 {
 418         if ((id[83] & 0xC000) != 0x4000)
 419                 return 0;
 420         return id[83] & (1 << 13);
 421 }
 422
 423 static inline int ata_id_has_lba48(const u16 *id)
 424 {
 425         if ((id[83] & 0xC000) != 0x4000)
 426                 return 0;
 427         return id[83] & (1 << 10);
 428 }
 429
 430 static inline int ata_id_hpa_enabled(const u16 *id)
 431 {
 432         /* Yes children, word 83 valid bits cover word 82 data */
 433         if ((id[83] & 0xC000) != 0x4000)
 434                 return 0;
 435         /* And 87 covers 85-87 */
 436         if ((id[87] & 0xC000) != 0x4000)
 437                 return 0;
 438         /* Check command sets enabled as well as supported */
 439         if ((id[85] & ( 1 << 10)) == 0)
 440                 return 0;
 441         return id[82] & (1 << 10);
 442 }
 443
 444 static inline int ata_id_has_wcache(const u16 *id)
 445 {
 446         /* Yes children, word 83 valid bits cover word 82 data */
 447         if ((id[83] & 0xC000) != 0x4000)
 448                 return 0;
 449         return id[82] & (1 << 5);
 450 }
 451
 452 static inline int ata_id_has_pm(const u16 *id)
 453 {
 454         if ((id[83] & 0xC000) != 0x4000)
 455                 return 0;
 456         return id[82] & (1 << 3);
 457 }
 458
 459 static inline int ata_id_rahead_enabled(const u16 *id)
 460 {
 461         if ((id[87] & 0xC000) != 0x4000)
 462                 return 0;
 463         return id[85] & (1 << 6);
 464 }
 465
 466 static inline int ata_id_wcache_enabled(const u16 *id)
 467 {
 468         if ((id[87] & 0xC000) != 0x4000)
 469                 return 0;
 470         return id[85] & (1 << 5);
 471 }
 472
 473 /**
 474  *      ata_id_major_version    -       get ATA level of drive
 475  *      @id: Identify data
 476  *
 477  *      Caveats:
 478  *              ATA-1 considers identify optional
 479  *              ATA-2 introduces mandatory identify
 480  *              ATA-3 introduces word 80 and accurate reporting
 481  *
 482  *      The practical impact of this is that ata_id_major_version cannot
 483  *      reliably report on drives below ATA3.
 484  */
 485
 486 static inline unsigned int ata_id_major_version(const u16 *id)
 487 {
 488         unsigned int mver;
 489
 490         if (id[ATA_ID_MAJOR_VER] == 0xFFFF)
 491                 return 0;
 492
 493         for (mver = 14; mver >= 1; mver--)
 494                 if (id[ATA_ID_MAJOR_VER] & (1 << mver))
 495                         break;
 496         return mver;
 497 }
 498
 499 static inline int ata_id_is_sata(const u16 *id)
 500 {
 501         return ata_id_major_version(id) >= 5 && id[93] == 0;
 502 }
 503
 504 static inline int ata_id_current_chs_valid(const u16 *id)
 505 {
 506         /* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command
 507            has not been issued to the device then the values of
 508            id[54] to id[56] are vendor specific. */
 509         return (id[53] & 0x01) && /* Current translation valid */
 510                 id[54] &&  /* cylinders in current translation */
 511                 id[55] &&  /* heads in current translation */
 512                 id[55] <= 16 &&
 513                 id[56];    /* sectors in current translation */
 514 }
 515
 516 static inline int ata_id_is_cfa(const u16 *id)
 517 {
 518         u16 v = id[0];
 519         if (v == 0x848A)        /* Standard CF */
 520                 return 1;
 521         /* Could be CF hiding as standard ATA */
 522         if (ata_id_major_version(id) >= 3 &&  id[82] != 0xFFFF &&
 523                         (id[82] & ( 1 << 2)))
 524                 return 1;
 525         return 0;
 526 }
 527
 528 static inline int ata_drive_40wire(const u16 *dev_id)
 529 {
 530         if (ata_id_is_sata(dev_id))
 531                 return 0;       /* SATA */
 532         if ((dev_id[93] & 0xE000) == 0x6000)
 533                 return 0;       /* 80 wire */
 534         return 1;
 535 }
 536
 537 static inline int atapi_cdb_len(const u16 *dev_id)
 538 {
 539         u16 tmp = dev_id[0] & 0x3;
 540         switch (tmp) {
 541         case 0:         return 12;
 542         case 1:         return 16;
 543         default:        return -1;
 544         }
 545 }
 546
 547 static inline int is_atapi_taskfile(const struct ata_taskfile *tf)
 548 {
 549         return (tf->protocol == ATA_PROT_ATAPI) ||
 550                (tf->protocol == ATA_PROT_ATAPI_NODATA) ||
 551                (tf->protocol == ATA_PROT_ATAPI_DMA);
 552 }
 553
 554 static inline int is_multi_taskfile(struct ata_taskfile *tf)
 555 {
 556         return (tf->command == ATA_CMD_READ_MULTI) ||
 557                (tf->command == ATA_CMD_WRITE_MULTI) ||
 558                (tf->command == ATA_CMD_READ_MULTI_EXT) ||
 559                (tf->command == ATA_CMD_WRITE_MULTI_EXT) ||
 560                (tf->command == ATA_CMD_WRITE_MULTI_FUA_EXT);
 561 }
 562
 563 static inline int ata_ok(u8 status)
 564 {
 565         return ((status & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | ATA_ERR))
 566                         == ATA_DRDY);
 567 }
 568
 569 static inline int lba_28_ok(u64 block, u32 n_block)
 570 {
 571         /* check the ending block number */
 572         return ((block + n_block - 1) < ((u64)1 << 28)) && (n_block <= 256);
 573 }
 574
 575 static inline int lba_48_ok(u64 block, u32 n_block)
 576 {
 577         /* check the ending block number */
 578         return ((block + n_block - 1) < ((u64)1 << 48)) && (n_block <= 65536);
 579 }
 580
 581 #define sata_pmp_gscr_vendor(gscr)      ((gscr)[SATA_PMP_GSCR_PROD_ID] & 0xffff)
 582 #define sata_pmp_gscr_devid(gscr)       ((gscr)[SATA_PMP_GSCR_PROD_ID] >> 16)
 583 #define sata_pmp_gscr_rev(gscr)         (((gscr)[SATA_PMP_GSCR_REV] >> 8) & 0xff)
 584 #define sata_pmp_gscr_ports(gscr)       ((gscr)[SATA_PMP_GSCR_PORT_INFO] & 0xf)
 585
 586 #endif /* __LINUX_ATA_H__ */