include/libata.h

   1 /*
   2  * Copyright 2003-2004 Red Hat, Inc.  All rights reserved.
   3  * Copyright 2003-2004 Jeff Garzik
   4  * Copyright (C) 2008 Freescale Semiconductor, Inc.
   5  *              Dave Liu <daveliu@freescale.com>
   6  *              port from libata of linux kernel
   7  *
   8  * SPDX-License-Identifier:     GPL-2.0+
   9  */
  10
  11 #ifndef __LIBATA_H__
  12 #define __LIBATA_H__
  13
  14 #include <common.h>
  15
  16 enum {
  17         /* various global constants */
  18         ATA_MAX_DEVICES         = 2,    /* per bus/port */
  19         ATA_MAX_PRD             = 256,  /* we could make these 256/256 */
  20         ATA_SECT_SIZE           = 512,
  21         ATA_MAX_SECTORS_128     = 128,
  22         ATA_MAX_SECTORS         = 256,
  23         ATA_MAX_SECTORS_LBA48   = 65535,
  24         ATA_MAX_SECTORS_TAPE    = 65535,
  25
  26         ATA_ID_WORDS            = 256,
  27         ATA_ID_SERNO            = 10,
  28         ATA_ID_FW_REV           = 23,
  29         ATA_ID_PROD             = 27,
  30         ATA_ID_OLD_PIO_MODES    = 51,
  31         ATA_ID_FIELD_VALID      = 53,
  32         ATA_ID_LBA_SECTORS      = 60,
  33         ATA_ID_MWDMA_MODES      = 63,
  34         ATA_ID_PIO_MODES        = 64,
  35         ATA_ID_EIDE_DMA_MIN     = 65,
  36         ATA_ID_EIDE_PIO         = 67,
  37         ATA_ID_EIDE_PIO_IORDY   = 68,
  38         ATA_ID_PIO4             = (1 << 1),
  39         ATA_ID_QUEUE_DEPTH      = 75,
  40         ATA_ID_SATA_CAP         = 76,
  41         ATA_ID_SATA_FEATURES    = 78,
  42         ATA_ID_SATA_FEATURES_EN = 79,
  43         ATA_ID_MAJOR_VER        = 80,
  44         ATA_ID_MINOR_VER        = 81,
  45         ATA_ID_UDMA_MODES       = 88,
  46         ATA_ID_LBA48_SECTORS    = 100,
  47
  48         ATA_ID_SERNO_LEN        = 20,
  49         ATA_ID_FW_REV_LEN       = 8,
  50         ATA_ID_PROD_LEN         = 40,
  51
  52         ATA_PCI_CTL_OFS         = 2,
  53
  54         ATA_PIO0                = (1 << 0),
  55         ATA_PIO1                = ATA_PIO0 | (1 << 1),
  56         ATA_PIO2                = ATA_PIO1 | (1 << 2),
  57         ATA_PIO3                = ATA_PIO2 | (1 << 3),
  58         ATA_PIO4                = ATA_PIO3 | (1 << 4),
  59         ATA_PIO5                = ATA_PIO4 | (1 << 5),
  60         ATA_PIO6                = ATA_PIO5 | (1 << 6),
  61
  62         ATA_SWDMA0              = (1 << 0),
  63         ATA_SWDMA1              = ATA_SWDMA0 | (1 << 1),
  64         ATA_SWDMA2              = ATA_SWDMA1 | (1 << 2),
  65
  66         ATA_SWDMA2_ONLY         = (1 << 2),
  67
  68         ATA_MWDMA0              = (1 << 0),
  69         ATA_MWDMA1              = ATA_MWDMA0 | (1 << 1),
  70         ATA_MWDMA2              = ATA_MWDMA1 | (1 << 2),
  71
  72         ATA_MWDMA12_ONLY        = (1 << 1) | (1 << 2),
  73         ATA_MWDMA2_ONLY         = (1 << 2),
  74
  75         ATA_UDMA0               = (1 << 0),
  76         ATA_UDMA1               = ATA_UDMA0 | (1 << 1),
  77         ATA_UDMA2               = ATA_UDMA1 | (1 << 2),
  78         ATA_UDMA3               = ATA_UDMA2 | (1 << 3),
  79         ATA_UDMA4               = ATA_UDMA3 | (1 << 4),
  80         ATA_UDMA5               = ATA_UDMA4 | (1 << 5),
  81         ATA_UDMA6               = ATA_UDMA5 | (1 << 6),
  82         ATA_UDMA7               = ATA_UDMA6 | (1 << 7),
  83         /* ATA_UDMA7 is just for completeness... doesn't exist (yet?).  */
  84
  85         ATA_UDMA_MASK_40C       = ATA_UDMA2,    /* udma0-2 */
  86
  87         /* DMA-related */
  88         ATA_PRD_SZ              = 8,
  89         ATA_PRD_TBL_SZ          = (ATA_MAX_PRD * ATA_PRD_SZ),
  90         ATA_PRD_EOT             = (1 << 31),    /* end-of-table flag */
  91
  92         ATA_DMA_TABLE_OFS       = 4,
  93         ATA_DMA_STATUS          = 2,
  94         ATA_DMA_CMD             = 0,
  95         ATA_DMA_WR              = (1 << 3),
  96         ATA_DMA_START           = (1 << 0),
  97         ATA_DMA_INTR            = (1 << 2),
  98         ATA_DMA_ERR             = (1 << 1),
  99         ATA_DMA_ACTIVE          = (1 << 0),
 100
 101         /* bits in ATA command block registers */
 102         ATA_HOB                 = (1 << 7),     /* LBA48 selector */
 103         ATA_NIEN                = (1 << 1),     /* disable-irq flag */
 104         ATA_LBA                 = (1 << 6),     /* LBA28 selector */
 105         ATA_DEV1                = (1 << 4),     /* Select Device 1 (slave) */
 106         ATA_DEVICE_OBS          = (1 << 7) | (1 << 5), /* obs bits in dev reg */
 107         ATA_DEVCTL_OBS          = (1 << 3),     /* obsolete bit in devctl reg */
 108         ATA_BUSY                = (1 << 7),     /* BSY status bit */
 109         ATA_DRDY                = (1 << 6),     /* device ready */
 110         ATA_DF                  = (1 << 5),     /* device fault */
 111         ATA_DRQ                 = (1 << 3),     /* data request i/o */
 112         ATA_ERR                 = (1 << 0),     /* have an error */
 113         ATA_SRST                = (1 << 2),     /* software reset */
 114         ATA_ICRC                = (1 << 7),     /* interface CRC error */
 115         ATA_UNC                 = (1 << 6),     /* uncorrectable media error */
 116         ATA_IDNF                = (1 << 4),     /* ID not found */
 117         ATA_ABORTED             = (1 << 2),     /* command aborted */
 118
 119         /* ATA command block registers */
 120         ATA_REG_DATA            = 0x00,
 121         ATA_REG_ERR             = 0x01,
 122         ATA_REG_NSECT           = 0x02,
 123         ATA_REG_LBAL            = 0x03,
 124         ATA_REG_LBAM            = 0x04,
 125         ATA_REG_LBAH            = 0x05,
 126         ATA_REG_DEVICE          = 0x06,
 127         ATA_REG_STATUS          = 0x07,
 128
 129         ATA_REG_FEATURE         = ATA_REG_ERR, /* and their aliases */
 130         ATA_REG_CMD             = ATA_REG_STATUS,
 131         ATA_REG_BYTEL           = ATA_REG_LBAM,
 132         ATA_REG_BYTEH           = ATA_REG_LBAH,
 133         ATA_REG_DEVSEL          = ATA_REG_DEVICE,
 134         ATA_REG_IRQ             = ATA_REG_NSECT,
 135
 136         /* ATA device commands */
 137         ATA_CMD_DEV_RESET       = 0x08, /* ATAPI device reset */
 138         ATA_CMD_CHK_POWER       = 0xE5, /* check power mode */
 139         ATA_CMD_STANDBY         = 0xE2, /* place in standby power mode */
 140         ATA_CMD_IDLE            = 0xE3, /* place in idle power mode */
 141         ATA_CMD_EDD             = 0x90, /* execute device diagnostic */
 142         ATA_CMD_FLUSH           = 0xE7,
 143         ATA_CMD_FLUSH_EXT       = 0xEA,
 144         ATA_CMD_ID_ATA          = 0xEC,
 145         ATA_CMD_ID_ATAPI        = 0xA1,
 146         ATA_CMD_READ            = 0xC8,
 147         ATA_CMD_READ_EXT        = 0x25,
 148         ATA_CMD_WRITE           = 0xCA,
 149         ATA_CMD_WRITE_EXT       = 0x35,
 150         ATA_CMD_WRITE_FUA_EXT   = 0x3D,
 151         ATA_CMD_FPDMA_READ      = 0x60,
 152         ATA_CMD_FPDMA_WRITE     = 0x61,
 153         ATA_CMD_PIO_READ        = 0x20,
 154         ATA_CMD_PIO_READ_EXT    = 0x24,
 155         ATA_CMD_PIO_WRITE       = 0x30,
 156         ATA_CMD_PIO_WRITE_EXT   = 0x34,
 157         ATA_CMD_READ_MULTI      = 0xC4,
 158         ATA_CMD_READ_MULTI_EXT  = 0x29,
 159         ATA_CMD_WRITE_MULTI     = 0xC5,
 160         ATA_CMD_WRITE_MULTI_EXT = 0x39,
 161         ATA_CMD_WRITE_MULTI_FUA_EXT = 0xCE,
 162         ATA_CMD_SET_FEATURES    = 0xEF,
 163         ATA_CMD_SET_MULTI       = 0xC6,
 164         ATA_CMD_PACKET          = 0xA0,
 165         ATA_CMD_VERIFY          = 0x40,
 166         ATA_CMD_VERIFY_EXT      = 0x42,
 167         ATA_CMD_STANDBYNOW1     = 0xE0,
 168         ATA_CMD_IDLEIMMEDIATE   = 0xE1,
 169         ATA_CMD_SLEEP           = 0xE6,
 170         ATA_CMD_INIT_DEV_PARAMS = 0x91,
 171         ATA_CMD_READ_NATIVE_MAX = 0xF8,
 172         ATA_CMD_READ_NATIVE_MAX_EXT = 0x27,
 173         ATA_CMD_SET_MAX         = 0xF9,
 174         ATA_CMD_SET_MAX_EXT     = 0x37,
 175         ATA_CMD_READ_LOG_EXT    = 0x2f,
 176         ATA_CMD_PMP_READ        = 0xE4,
 177         ATA_CMD_PMP_WRITE       = 0xE8,
 178         ATA_CMD_CONF_OVERLAY    = 0xB1,
 179         ATA_CMD_SEC_FREEZE_LOCK = 0xF5,
 180
 181         /* READ_LOG_EXT pages */
 182         ATA_LOG_SATA_NCQ        = 0x10,
 183
 184         /* READ/WRITE LONG (obsolete) */
 185         ATA_CMD_READ_LONG       = 0x22,
 186         ATA_CMD_READ_LONG_ONCE  = 0x23,
 187         ATA_CMD_WRITE_LONG      = 0x32,
 188         ATA_CMD_WRITE_LONG_ONCE = 0x33,
 189
 190         /* SETFEATURES stuff */
 191         SETFEATURES_XFER        = 0x03,
 192         XFER_UDMA_7             = 0x47,
 193         XFER_UDMA_6             = 0x46,
 194         XFER_UDMA_5             = 0x45,
 195         XFER_UDMA_4             = 0x44,
 196         XFER_UDMA_3             = 0x43,
 197         XFER_UDMA_2             = 0x42,
 198         XFER_UDMA_1             = 0x41,
 199         XFER_UDMA_0             = 0x40,
 200         XFER_MW_DMA_4           = 0x24, /* CFA only */
 201         XFER_MW_DMA_3           = 0x23, /* CFA only */
 202         XFER_MW_DMA_2           = 0x22,
 203         XFER_MW_DMA_1           = 0x21,
 204         XFER_MW_DMA_0           = 0x20,
 205         XFER_SW_DMA_2           = 0x12,
 206         XFER_SW_DMA_1           = 0x11,
 207         XFER_SW_DMA_0           = 0x10,
 208         XFER_PIO_6              = 0x0E, /* CFA only */
 209         XFER_PIO_5              = 0x0D, /* CFA only */
 210         XFER_PIO_4              = 0x0C,
 211         XFER_PIO_3              = 0x0B,
 212         XFER_PIO_2              = 0x0A,
 213         XFER_PIO_1              = 0x09,
 214         XFER_PIO_0              = 0x08,
 215         XFER_PIO_SLOW           = 0x00,
 216
 217         SETFEATURES_WC_ON       = 0x02, /* Enable write cache */
 218         SETFEATURES_WC_OFF      = 0x82, /* Disable write cache */
 219
 220         SETFEATURES_SPINUP      = 0x07, /* Spin-up drive */
 221
 222         SETFEATURES_SATA_ENABLE = 0x10, /* Enable use of SATA feature */
 223         SETFEATURES_SATA_DISABLE = 0x90, /* Disable use of SATA feature */
 224
 225         /* SETFEATURE Sector counts for SATA features */
 226         SATA_AN                 = 0x05,  /* Asynchronous Notification */
 227         SATA_DIPM               = 0x03,  /* Device Initiated Power Management */
 228
 229         /* feature values for SET_MAX */
 230         ATA_SET_MAX_ADDR        = 0x00,
 231         ATA_SET_MAX_PASSWD      = 0x01,
 232         ATA_SET_MAX_LOCK        = 0x02,
 233         ATA_SET_MAX_UNLOCK      = 0x03,
 234         ATA_SET_MAX_FREEZE_LOCK = 0x04,
 235
 236         /* feature values for DEVICE CONFIGURATION OVERLAY */
 237         ATA_DCO_RESTORE         = 0xC0,
 238         ATA_DCO_FREEZE_LOCK     = 0xC1,
 239         ATA_DCO_IDENTIFY        = 0xC2,
 240         ATA_DCO_SET             = 0xC3,
 241
 242         /* ATAPI stuff */
 243         ATAPI_PKT_DMA           = (1 << 0),
 244         ATAPI_DMADIR            = (1 << 2),     /* ATAPI data dir:
 245                                                    0=to device, 1=to host */
 246         ATAPI_CDB_LEN           = 16,
 247
 248         /* PMP stuff */
 249         SATA_PMP_MAX_PORTS      = 15,
 250         SATA_PMP_CTRL_PORT      = 15,
 251
 252         SATA_PMP_GSCR_DWORDS    = 128,
 253         SATA_PMP_GSCR_PROD_ID   = 0,
 254         SATA_PMP_GSCR_REV       = 1,
 255         SATA_PMP_GSCR_PORT_INFO = 2,
 256         SATA_PMP_GSCR_ERROR     = 32,
 257         SATA_PMP_GSCR_ERROR_EN  = 33,
 258         SATA_PMP_GSCR_FEAT      = 64,
 259         SATA_PMP_GSCR_FEAT_EN   = 96,
 260
 261         SATA_PMP_PSCR_STATUS    = 0,
 262         SATA_PMP_PSCR_ERROR     = 1,
 263         SATA_PMP_PSCR_CONTROL   = 2,
 264
 265         SATA_PMP_FEAT_BIST      = (1 << 0),
 266         SATA_PMP_FEAT_PMREQ     = (1 << 1),
 267         SATA_PMP_FEAT_DYNSSC    = (1 << 2),
 268         SATA_PMP_FEAT_NOTIFY    = (1 << 3),
 269
 270         /* cable types */
 271         ATA_CBL_NONE            = 0,
 272         ATA_CBL_PATA40          = 1,
 273         ATA_CBL_PATA80          = 2,
 274         ATA_CBL_PATA40_SHORT    = 3,    /* 40 wire cable to high UDMA spec */
 275         ATA_CBL_PATA_UNK        = 4,    /* don't know, maybe 80c? */
 276         ATA_CBL_PATA_IGN        = 5,    /* don't know, ignore cable handling */
 277         ATA_CBL_SATA            = 6,
 278
 279         /* SATA Status and Control Registers */
 280         SCR_STATUS              = 0,
 281         SCR_ERROR               = 1,
 282         SCR_CONTROL             = 2,
 283         SCR_ACTIVE              = 3,
 284         SCR_NOTIFICATION        = 4,
 285
 286         /* SError bits */
 287         SERR_DATA_RECOVERED     = (1 << 0), /* recovered data error */
 288         SERR_COMM_RECOVERED     = (1 << 1), /* recovered comm failure */
 289         SERR_DATA               = (1 << 8), /* unrecovered data error */
 290         SERR_PERSISTENT         = (1 << 9), /* persistent data/comm error */
 291         SERR_PROTOCOL           = (1 << 10), /* protocol violation */
 292         SERR_INTERNAL           = (1 << 11), /* host internal error */
 293         SERR_PHYRDY_CHG         = (1 << 16), /* PHY RDY changed */
 294         SERR_PHY_INT_ERR        = (1 << 17), /* PHY internal error */
 295         SERR_COMM_WAKE          = (1 << 18), /* Comm wake */
 296         SERR_10B_8B_ERR         = (1 << 19), /* 10b to 8b decode error */
 297         SERR_DISPARITY          = (1 << 20), /* Disparity */
 298         SERR_CRC                = (1 << 21), /* CRC error */
 299         SERR_HANDSHAKE          = (1 << 22), /* Handshake error */
 300         SERR_LINK_SEQ_ERR       = (1 << 23), /* Link sequence error */
 301         SERR_TRANS_ST_ERROR     = (1 << 24), /* Transport state trans. error */
 302         SERR_UNRECOG_FIS        = (1 << 25), /* Unrecognized FIS */
 303         SERR_DEV_XCHG           = (1 << 26), /* device exchanged */
 304
 305         /* struct ata_taskfile flags */
 306         ATA_TFLAG_LBA48         = (1 << 0), /* enable 48-bit LBA and "HOB" */
 307         ATA_TFLAG_ISADDR        = (1 << 1), /* enable r/w to nsect/lba regs */
 308         ATA_TFLAG_DEVICE        = (1 << 2), /* enable r/w to device reg */
 309         ATA_TFLAG_WRITE         = (1 << 3), /* data dir: host->dev==1 (write) */
 310         ATA_TFLAG_LBA           = (1 << 4), /* enable LBA */
 311         ATA_TFLAG_FUA           = (1 << 5), /* enable FUA */
 312         ATA_TFLAG_POLLING       = (1 << 6), /* set nIEN to 1 and use polling */
 313
 314         /* protocol flags */
 315         ATA_PROT_FLAG_PIO       = (1 << 0), /* is PIO */
 316         ATA_PROT_FLAG_DMA       = (1 << 1), /* is DMA */
 317         ATA_PROT_FLAG_DATA      = ATA_PROT_FLAG_PIO | ATA_PROT_FLAG_DMA,
 318         ATA_PROT_FLAG_NCQ       = (1 << 2), /* is NCQ */
 319         ATA_PROT_FLAG_ATAPI     = (1 << 3), /* is ATAPI */
 320 };
 321
 322 enum ata_tf_protocols {
 323         /* ATA taskfile protocols */
 324         ATA_PROT_UNKNOWN,       /* unknown/invalid */
 325         ATA_PROT_NODATA,        /* no data */
 326         ATA_PROT_PIO,           /* PIO data xfer */
 327         ATA_PROT_DMA,           /* DMA */
 328         ATA_PROT_NCQ,           /* NCQ */
 329         ATAPI_PROT_NODATA,      /* packet command, no data */
 330         ATAPI_PROT_PIO,         /* packet command, PIO data xfer*/
 331         ATAPI_PROT_DMA,         /* packet command with special DMA sauce */
 332 };
 333
 334 enum ata_ioctls {
 335         ATA_IOC_GET_IO32        = 0x309,
 336         ATA_IOC_SET_IO32        = 0x324,
 337 };
 338
 339 enum ata_dev_typed {
 340         ATA_DEV_ATA,            /* ATA device */
 341         ATA_DEV_ATAPI,          /* ATAPI device */
 342         ATA_DEV_PMP,            /* Port Multiplier Port */
 343         ATA_DEV_UNKNOWN,        /* unknown */
 344 };
 345
 346 struct ata_taskfile {
 347         unsigned long           flags;          /* ATA_TFLAG_xxx */
 348         u8                      protocol;       /* ATA_PROT_xxx */
 349
 350         u8                      ctl;            /* control reg */
 351
 352         u8                      hob_feature;    /* additional data */
 353         u8                      hob_nsect;      /* to support LBA48 */
 354         u8                      hob_lbal;
 355         u8                      hob_lbam;
 356         u8                      hob_lbah;
 357
 358         u8                      feature;
 359         u8                      nsect;
 360         u8                      lbal;
 361         u8                      lbam;
 362         u8                      lbah;
 363
 364         u8                      device;
 365
 366         u8                      command;        /* IO operation */
 367 };
 368
 369 /*
 370  * protocol tests
 371  */
 372 static inline unsigned int ata_prot_flags(u8 prot)
 373 {
 374         switch (prot) {
 375         case ATA_PROT_NODATA:
 376                 return 0;
 377         case ATA_PROT_PIO:
 378                 return ATA_PROT_FLAG_PIO;
 379         case ATA_PROT_DMA:
 380                 return ATA_PROT_FLAG_DMA;
 381         case ATA_PROT_NCQ:
 382                 return ATA_PROT_FLAG_DMA | ATA_PROT_FLAG_NCQ;
 383         case ATAPI_PROT_NODATA:
 384                 return ATA_PROT_FLAG_ATAPI;
 385         case ATAPI_PROT_PIO:
 386                 return ATA_PROT_FLAG_ATAPI | ATA_PROT_FLAG_PIO;
 387         case ATAPI_PROT_DMA:
 388                 return ATA_PROT_FLAG_ATAPI | ATA_PROT_FLAG_DMA;
 389         }
 390         return 0;
 391 }
 392
 393 static inline int ata_is_atapi(u8 prot)
 394 {
 395         return ata_prot_flags(prot) & ATA_PROT_FLAG_ATAPI;
 396 }
 397
 398 static inline int ata_is_nodata(u8 prot)
 399 {
 400         return !(ata_prot_flags(prot) & ATA_PROT_FLAG_DATA);
 401 }
 402
 403 static inline int ata_is_pio(u8 prot)
 404 {
 405         return ata_prot_flags(prot) & ATA_PROT_FLAG_PIO;
 406 }
 407
 408 static inline int ata_is_dma(u8 prot)
 409 {
 410         return ata_prot_flags(prot) & ATA_PROT_FLAG_DMA;
 411 }
 412
 413 static inline int ata_is_ncq(u8 prot)
 414 {
 415         return ata_prot_flags(prot) & ATA_PROT_FLAG_NCQ;
 416 }
 417
 418 static inline int ata_is_data(u8 prot)
 419 {
 420         return ata_prot_flags(prot) & ATA_PROT_FLAG_DATA;
 421 }
 422
 423 /*
 424  * id tests
 425  */
 426 #define ata_id_is_ata(id)               (((id)[0] & (1 << 15)) == 0)
 427 #define ata_id_has_lba(id)              ((id)[49] & (1 << 9))
 428 #define ata_id_has_dma(id)              ((id)[49] & (1 << 8))
 429 #define ata_id_has_ncq(id)              ((id)[76] & (1 << 8))
 430 #define ata_id_queue_depth(id)          (((id)[75] & 0x1f) + 1)
 431 #define ata_id_removeable(id)           ((id)[0] & (1 << 7))
 432 #define ata_id_iordy_disable(id)        ((id)[49] & (1 << 10))
 433 #define ata_id_has_iordy(id)            ((id)[49] & (1 << 11))
 434
 435 #define ata_id_u32(id,n)        \
 436         (((u32) (id)[(n) + 1] << 16) | ((u32) (id)[(n)]))
 437 #define ata_id_u64(id,n)        \
 438         ( ((u64) (id)[(n) + 3] << 48) | \
 439           ((u64) (id)[(n) + 2] << 32) | \
 440           ((u64) (id)[(n) + 1] << 16) | \
 441           ((u64) (id)[(n) + 0]) )
 442
 443 #define ata_id_cdb_intr(id)             (((id)[0] & 0x60) == 0x20)
 444
 445 static inline int ata_id_has_fua(const u16 *id)
 446 {
 447         if ((id[84] & 0xC000) != 0x4000)
 448                 return 0;
 449         return id[84] & (1 << 6);
 450 }
 451
 452 static inline int ata_id_has_flush(const u16 *id)
 453 {
 454         if ((id[83] & 0xC000) != 0x4000)
 455                 return 0;
 456         return id[83] & (1 << 12);
 457 }
 458
 459 static inline int ata_id_has_flush_ext(const u16 *id)
 460 {
 461         if ((id[83] & 0xC000) != 0x4000)
 462                 return 0;
 463         return id[83] & (1 << 13);
 464 }
 465
 466 static inline int ata_id_has_lba48(const u16 *id)
 467 {
 468         if ((id[83] & 0xC000) != 0x4000)
 469                 return 0;
 470         if (!ata_id_u64(id, 100))
 471                 return 0;
 472         return id[83] & (1 << 10);
 473 }
 474
 475 static inline int ata_id_hpa_enabled(const u16 *id)
 476 {
 477         /* Yes children, word 83 valid bits cover word 82 data */
 478         if ((id[83] & 0xC000) != 0x4000)
 479                 return 0;
 480         /* And 87 covers 85-87 */
 481         if ((id[87] & 0xC000) != 0x4000)
 482                 return 0;
 483         /* Check command sets enabled as well as supported */
 484         if ((id[85] & ( 1 << 10)) == 0)
 485                 return 0;
 486         return id[82] & (1 << 10);
 487 }
 488
 489 static inline int ata_id_has_wcache(const u16 *id)
 490 {
 491         /* Yes children, word 83 valid bits cover word 82 data */
 492         if ((id[83] & 0xC000) != 0x4000)
 493                 return 0;
 494         return id[82] & (1 << 5);
 495 }
 496
 497 static inline int ata_id_has_pm(const u16 *id)
 498 {
 499         if ((id[83] & 0xC000) != 0x4000)
 500                 return 0;
 501         return id[82] & (1 << 3);
 502 }
 503
 504 static inline int ata_id_rahead_enabled(const u16 *id)
 505 {
 506         if ((id[87] & 0xC000) != 0x4000)
 507                 return 0;
 508         return id[85] & (1 << 6);
 509 }
 510
 511 static inline int ata_id_wcache_enabled(const u16 *id)
 512 {
 513         if ((id[87] & 0xC000) != 0x4000)
 514                 return 0;
 515         return id[85] & (1 << 5);
 516 }
 517
 518 static inline unsigned int ata_id_major_version(const u16 *id)
 519 {
 520         unsigned int mver;
 521
 522         if (id[ATA_ID_MAJOR_VER] == 0xFFFF)
 523                 return 0;
 524
 525         for (mver = 14; mver >= 1; mver--)
 526                 if (id[ATA_ID_MAJOR_VER] & (1 << mver))
 527                         break;
 528         return mver;
 529 }
 530
 531 static inline int ata_id_is_sata(const u16 *id)
 532 {
 533         return ata_id_major_version(id) >= 5 && id[93] == 0;
 534 }
 535
 536 static inline int ata_id_has_tpm(const u16 *id)
 537 {
 538         /* The TPM bits are only valid on ATA8 */
 539         if (ata_id_major_version(id) < 8)
 540                 return 0;
 541         if ((id[48] & 0xC000) != 0x4000)
 542                 return 0;
 543         return id[48] & (1 << 0);
 544 }
 545
 546 static inline int ata_id_has_dword_io(const u16 *id)
 547 {
 548         /* ATA 8 reuses this flag for "trusted" computing */
 549         if (ata_id_major_version(id) > 7)
 550                 return 0;
 551         if (id[48] & (1 << 0))
 552                 return 1;
 553         return 0;
 554 }
 555
 556 static inline int ata_id_current_chs_valid(const u16 *id)
 557 {
 558         /* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command
 559            has not been issued to the device then the values of
 560            id[54] to id[56] are vendor specific. */
 561         return (id[53] & 0x01) && /* Current translation valid */
 562                 id[54] &&  /* cylinders in current translation */
 563                 id[55] &&  /* heads in current translation */
 564                 id[55] <= 16 &&
 565                 id[56];    /* sectors in current translation */
 566 }
 567
 568 static inline int ata_id_is_cfa(const u16 *id)
 569 {
 570         u16 v = id[0];
 571         if (v == 0x848A)        /* Standard CF */
 572                 return 1;
 573         /* Could be CF hiding as standard ATA */
 574         if (ata_id_major_version(id) >= 3 &&  id[82] != 0xFFFF &&
 575                         (id[82] & ( 1 << 2)))
 576                 return 1;
 577         return 0;
 578 }
 579
 580 static inline int ata_drive_40wire(const u16 *dev_id)
 581 {
 582         if (ata_id_is_sata(dev_id))
 583                 return 0;       /* SATA */
 584         if ((dev_id[93] & 0xE000) == 0x6000)
 585                 return 0;       /* 80 wire */
 586         return 1;
 587 }
 588
 589 static inline int ata_drive_40wire_relaxed(const u16 *dev_id)
 590 {
 591         if ((dev_id[93] & 0x2000) == 0x2000)
 592                 return 0;       /* 80 wire */
 593         return 1;
 594 }
 595
 596 static inline int atapi_cdb_len(const u16 *dev_id)
 597 {
 598         u16 tmp = dev_id[0] & 0x3;
 599         switch (tmp) {
 600         case 0:         return 12;
 601         case 1:         return 16;
 602         default:        return -1;
 603         }
 604 }
 605
 606 static inline int atapi_command_packet_set(const u16 *dev_id)
 607 {
 608         return (dev_id[0] >> 8) & 0x1f;
 609 }
 610
 611 static inline int atapi_id_dmadir(const u16 *dev_id)
 612 {
 613         return ata_id_major_version(dev_id) >= 7 && (dev_id[62] & 0x8000);
 614 }
 615
 616 static inline int is_multi_taskfile(struct ata_taskfile *tf)
 617 {
 618         return (tf->command == ATA_CMD_READ_MULTI) ||
 619                (tf->command == ATA_CMD_WRITE_MULTI) ||
 620                (tf->command == ATA_CMD_READ_MULTI_EXT) ||
 621                (tf->command == ATA_CMD_WRITE_MULTI_EXT) ||
 622                (tf->command == ATA_CMD_WRITE_MULTI_FUA_EXT);
 623 }
 624
 625 static inline int ata_ok(u8 status)
 626 {
 627         return ((status & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | ATA_ERR))
 628                         == ATA_DRDY);
 629 }
 630
 631 static inline int lba_28_ok(u64 block, u32 n_block)
 632 {
 633         /* check the ending block number */
 634         return ((block + n_block - 1) < ((u64)1 << 28)) && (n_block <= 256);
 635 }
 636
 637 static inline int lba_48_ok(u64 block, u32 n_block)
 638 {
 639         /* check the ending block number */
 640         return ((block + n_block - 1) < ((u64)1 << 48)) && (n_block <= 65536);
 641 }
 642
 643 #define sata_pmp_gscr_vendor(gscr)      ((gscr)[SATA_PMP_GSCR_PROD_ID] & 0xffff)
 644 #define sata_pmp_gscr_devid(gscr)       ((gscr)[SATA_PMP_GSCR_PROD_ID] >> 16)
 645 #define sata_pmp_gscr_rev(gscr)         (((gscr)[SATA_PMP_GSCR_REV] >> 8) & 0xff)
 646 #define sata_pmp_gscr_ports(gscr)       ((gscr)[SATA_PMP_GSCR_PORT_INFO] & 0xf)
 647
 648 u64 ata_id_n_sectors(u16 *id);
 649 u32 ata_dev_classify(u32 sig);
 650 void ata_id_c_string(const u16 *id, unsigned char *s,
 651                          unsigned int ofs, unsigned int len);
 652 void ata_dump_id(u16 *id);
 653 void ata_swap_buf_le16(u16 *buf, unsigned int buf_words);
 654
 655 #endif /* __LIBATA_H__ */