LXR uboot/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
  16enum {
  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
 322enum 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
 334enum ata_ioctls {
 335        ATA_IOC_GET_IO32        = 0x309,
 336        ATA_IOC_SET_IO32        = 0x324,
 337};
 338
 339enum 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
 346struct 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 */
 372static 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
 393static inline int ata_is_atapi(u8 prot)
 394{
 395        return ata_prot_flags(prot) & ATA_PROT_FLAG_ATAPI;
 396}
 397
 398static inline int ata_is_nodata(u8 prot)
 399{
 400        return !(ata_prot_flags(prot) & ATA_PROT_FLAG_DATA);
 401}
 402
 403static inline int ata_is_pio(u8 prot)
 404{
 405        return ata_prot_flags(prot) & ATA_PROT_FLAG_PIO;
 406}
 407
 408static inline int ata_is_dma(u8 prot)
 409{
 410        return ata_prot_flags(prot) & ATA_PROT_FLAG_DMA;
 411}
 412
 413static inline int ata_is_ncq(u8 prot)
 414{
 415        return ata_prot_flags(prot) & ATA_PROT_FLAG_NCQ;
 416}
 417
 418static 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
 445static 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
 452static 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
 459static 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
 466static 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
 475static 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
 489static 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
 497static 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
 504static 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
 511static 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
 518static 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
 531static inline int ata_id_is_sata(const u16 *id)
 532{
 533        return ata_id_major_version(id) >= 5 && id[93] == 0;
 534}
 535
 536static 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
 546static 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
 556static 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
 568static 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
 580static 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
 589static 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
 596static 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
 606static inline int atapi_command_packet_set(const u16 *dev_id)
 607{
 608        return (dev_id[0] >> 8) & 0x1f;
 609}
 610
 611static 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
 616static 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
 625static 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
 631static 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
 637static 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
 648u64 ata_id_n_sectors(u16 *id);
 649u32 ata_dev_classify(u32 sig);
 650void ata_id_c_string(const u16 *id, unsigned char *s,
 651                         unsigned int ofs, unsigned int len);
 652void ata_dump_id(u16 *id);
 653void ata_swap_buf_le16(u16 *buf, unsigned int buf_words);
 654
 655#endif /* __LIBATA_H__ */
 656