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 * This program is free software; you can redistribute it and/or
   9 * modify it under the terms of the GNU General Public License as
  10 * published by the Free Software Foundation; either version 2 of
  11 * the License, or (at your option) any later version.
  12 *
  13 * This program is distributed in the hope that it will be useful,
  14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16 * GNU General Public License for more details.
  17 *
  18 * You should have received a copy of the GNU General Public License
  19 * along with this program; if not, write to the Free Software
  20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21 * MA 02111-1307 USA
  22 *
  23 */
  24
  25#ifndef __LIBATA_H__
  26#define __LIBATA_H__
  27
  28#include <common.h>
  29
  30enum {
  31        /* various global constants */
  32        ATA_MAX_DEVICES         = 2,    /* per bus/port */
  33        ATA_MAX_PRD             = 256,  /* we could make these 256/256 */
  34        ATA_SECT_SIZE           = 512,
  35        ATA_MAX_SECTORS_128     = 128,
  36        ATA_MAX_SECTORS         = 256,
  37        ATA_MAX_SECTORS_LBA48   = 65535,
  38        ATA_MAX_SECTORS_TAPE    = 65535,
  39
  40        ATA_ID_WORDS            = 256,
  41        ATA_ID_SERNO            = 10,
  42        ATA_ID_FW_REV           = 23,
  43        ATA_ID_PROD             = 27,
  44        ATA_ID_OLD_PIO_MODES    = 51,
  45        ATA_ID_FIELD_VALID      = 53,
  46        ATA_ID_LBA_SECTORS      = 60,
  47        ATA_ID_MWDMA_MODES      = 63,
  48        ATA_ID_PIO_MODES        = 64,
  49        ATA_ID_EIDE_DMA_MIN     = 65,
  50        ATA_ID_EIDE_PIO         = 67,
  51        ATA_ID_EIDE_PIO_IORDY   = 68,
  52        ATA_ID_PIO4             = (1 << 1),
  53        ATA_ID_QUEUE_DEPTH      = 75,
  54        ATA_ID_SATA_CAP         = 76,
  55        ATA_ID_SATA_FEATURES    = 78,
  56        ATA_ID_SATA_FEATURES_EN = 79,
  57        ATA_ID_MAJOR_VER        = 80,
  58        ATA_ID_MINOR_VER        = 81,
  59        ATA_ID_UDMA_MODES       = 88,
  60        ATA_ID_LBA48_SECTORS    = 100,
  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        ATA_CMD_CONF_OVERLAY    = 0xB1,
 193        ATA_CMD_SEC_FREEZE_LOCK = 0xF5,
 194
 195        /* READ_LOG_EXT pages */
 196        ATA_LOG_SATA_NCQ        = 0x10,
 197
 198        /* READ/WRITE LONG (obsolete) */
 199        ATA_CMD_READ_LONG       = 0x22,
 200        ATA_CMD_READ_LONG_ONCE  = 0x23,
 201        ATA_CMD_WRITE_LONG      = 0x32,
 202        ATA_CMD_WRITE_LONG_ONCE = 0x33,
 203
 204        /* SETFEATURES stuff */
 205        SETFEATURES_XFER        = 0x03,
 206        XFER_UDMA_7             = 0x47,
 207        XFER_UDMA_6             = 0x46,
 208        XFER_UDMA_5             = 0x45,
 209        XFER_UDMA_4             = 0x44,
 210        XFER_UDMA_3             = 0x43,
 211        XFER_UDMA_2             = 0x42,
 212        XFER_UDMA_1             = 0x41,
 213        XFER_UDMA_0             = 0x40,
 214        XFER_MW_DMA_4           = 0x24, /* CFA only */
 215        XFER_MW_DMA_3           = 0x23, /* CFA only */
 216        XFER_MW_DMA_2           = 0x22,
 217        XFER_MW_DMA_1           = 0x21,
 218        XFER_MW_DMA_0           = 0x20,
 219        XFER_SW_DMA_2           = 0x12,
 220        XFER_SW_DMA_1           = 0x11,
 221        XFER_SW_DMA_0           = 0x10,
 222        XFER_PIO_6              = 0x0E, /* CFA only */
 223        XFER_PIO_5              = 0x0D, /* CFA only */
 224        XFER_PIO_4              = 0x0C,
 225        XFER_PIO_3              = 0x0B,
 226        XFER_PIO_2              = 0x0A,
 227        XFER_PIO_1              = 0x09,
 228        XFER_PIO_0              = 0x08,
 229        XFER_PIO_SLOW           = 0x00,
 230
 231        SETFEATURES_WC_ON       = 0x02, /* Enable write cache */
 232        SETFEATURES_WC_OFF      = 0x82, /* Disable write cache */
 233
 234        SETFEATURES_SPINUP      = 0x07, /* Spin-up drive */
 235
 236        SETFEATURES_SATA_ENABLE = 0x10, /* Enable use of SATA feature */
 237        SETFEATURES_SATA_DISABLE = 0x90, /* Disable use of SATA feature */
 238
 239        /* SETFEATURE Sector counts for SATA features */
 240        SATA_AN                 = 0x05,  /* Asynchronous Notification */
 241        SATA_DIPM               = 0x03,  /* Device Initiated Power Management */
 242
 243        /* feature values for SET_MAX */
 244        ATA_SET_MAX_ADDR        = 0x00,
 245        ATA_SET_MAX_PASSWD      = 0x01,
 246        ATA_SET_MAX_LOCK        = 0x02,
 247        ATA_SET_MAX_UNLOCK      = 0x03,
 248        ATA_SET_MAX_FREEZE_LOCK = 0x04,
 249
 250        /* feature values for DEVICE CONFIGURATION OVERLAY */
 251        ATA_DCO_RESTORE         = 0xC0,
 252        ATA_DCO_FREEZE_LOCK     = 0xC1,
 253        ATA_DCO_IDENTIFY        = 0xC2,
 254        ATA_DCO_SET             = 0xC3,
 255
 256        /* ATAPI stuff */
 257        ATAPI_PKT_DMA           = (1 << 0),
 258        ATAPI_DMADIR            = (1 << 2),     /* ATAPI data dir:
 259                                                   0=to device, 1=to host */
 260        ATAPI_CDB_LEN           = 16,
 261
 262        /* PMP stuff */
 263        SATA_PMP_MAX_PORTS      = 15,
 264        SATA_PMP_CTRL_PORT      = 15,
 265
 266        SATA_PMP_GSCR_DWORDS    = 128,
 267        SATA_PMP_GSCR_PROD_ID   = 0,
 268        SATA_PMP_GSCR_REV       = 1,
 269        SATA_PMP_GSCR_PORT_INFO = 2,
 270        SATA_PMP_GSCR_ERROR     = 32,
 271        SATA_PMP_GSCR_ERROR_EN  = 33,
 272        SATA_PMP_GSCR_FEAT      = 64,
 273        SATA_PMP_GSCR_FEAT_EN   = 96,
 274
 275        SATA_PMP_PSCR_STATUS    = 0,
 276        SATA_PMP_PSCR_ERROR     = 1,
 277        SATA_PMP_PSCR_CONTROL   = 2,
 278
 279        SATA_PMP_FEAT_BIST      = (1 << 0),
 280        SATA_PMP_FEAT_PMREQ     = (1 << 1),
 281        SATA_PMP_FEAT_DYNSSC    = (1 << 2),
 282        SATA_PMP_FEAT_NOTIFY    = (1 << 3),
 283
 284        /* cable types */
 285        ATA_CBL_NONE            = 0,
 286        ATA_CBL_PATA40          = 1,
 287        ATA_CBL_PATA80          = 2,
 288        ATA_CBL_PATA40_SHORT    = 3,    /* 40 wire cable to high UDMA spec */
 289        ATA_CBL_PATA_UNK        = 4,    /* don't know, maybe 80c? */
 290        ATA_CBL_PATA_IGN        = 5,    /* don't know, ignore cable handling */
 291        ATA_CBL_SATA            = 6,
 292
 293        /* SATA Status and Control Registers */
 294        SCR_STATUS              = 0,
 295        SCR_ERROR               = 1,
 296        SCR_CONTROL             = 2,
 297        SCR_ACTIVE              = 3,
 298        SCR_NOTIFICATION        = 4,
 299
 300        /* SError bits */
 301        SERR_DATA_RECOVERED     = (1 << 0), /* recovered data error */
 302        SERR_COMM_RECOVERED     = (1 << 1), /* recovered comm failure */
 303        SERR_DATA               = (1 << 8), /* unrecovered data error */
 304        SERR_PERSISTENT         = (1 << 9), /* persistent data/comm error */
 305        SERR_PROTOCOL           = (1 << 10), /* protocol violation */
 306        SERR_INTERNAL           = (1 << 11), /* host internal error */
 307        SERR_PHYRDY_CHG         = (1 << 16), /* PHY RDY changed */
 308        SERR_PHY_INT_ERR        = (1 << 17), /* PHY internal error */
 309        SERR_COMM_WAKE          = (1 << 18), /* Comm wake */
 310        SERR_10B_8B_ERR         = (1 << 19), /* 10b to 8b decode error */
 311        SERR_DISPARITY          = (1 << 20), /* Disparity */
 312        SERR_CRC                = (1 << 21), /* CRC error */
 313        SERR_HANDSHAKE          = (1 << 22), /* Handshake error */
 314        SERR_LINK_SEQ_ERR       = (1 << 23), /* Link sequence error */
 315        SERR_TRANS_ST_ERROR     = (1 << 24), /* Transport state trans. error */
 316        SERR_UNRECOG_FIS        = (1 << 25), /* Unrecognized FIS */
 317        SERR_DEV_XCHG           = (1 << 26), /* device exchanged */
 318
 319        /* struct ata_taskfile flags */
 320        ATA_TFLAG_LBA48         = (1 << 0), /* enable 48-bit LBA and "HOB" */
 321        ATA_TFLAG_ISADDR        = (1 << 1), /* enable r/w to nsect/lba regs */
 322        ATA_TFLAG_DEVICE        = (1 << 2), /* enable r/w to device reg */
 323        ATA_TFLAG_WRITE         = (1 << 3), /* data dir: host->dev==1 (write) */
 324        ATA_TFLAG_LBA           = (1 << 4), /* enable LBA */
 325        ATA_TFLAG_FUA           = (1 << 5), /* enable FUA */
 326        ATA_TFLAG_POLLING       = (1 << 6), /* set nIEN to 1 and use polling */
 327
 328        /* protocol flags */
 329        ATA_PROT_FLAG_PIO       = (1 << 0), /* is PIO */
 330        ATA_PROT_FLAG_DMA       = (1 << 1), /* is DMA */
 331        ATA_PROT_FLAG_DATA      = ATA_PROT_FLAG_PIO | ATA_PROT_FLAG_DMA,
 332        ATA_PROT_FLAG_NCQ       = (1 << 2), /* is NCQ */
 333        ATA_PROT_FLAG_ATAPI     = (1 << 3), /* is ATAPI */
 334};
 335
 336enum ata_tf_protocols {
 337        /* ATA taskfile protocols */
 338        ATA_PROT_UNKNOWN,       /* unknown/invalid */
 339        ATA_PROT_NODATA,        /* no data */
 340        ATA_PROT_PIO,           /* PIO data xfer */
 341        ATA_PROT_DMA,           /* DMA */
 342        ATA_PROT_NCQ,           /* NCQ */
 343        ATAPI_PROT_NODATA,      /* packet command, no data */
 344        ATAPI_PROT_PIO,         /* packet command, PIO data xfer*/
 345        ATAPI_PROT_DMA,         /* packet command with special DMA sauce */
 346};
 347
 348enum ata_ioctls {
 349        ATA_IOC_GET_IO32        = 0x309,
 350        ATA_IOC_SET_IO32        = 0x324,
 351};
 352
 353enum ata_dev_typed {
 354        ATA_DEV_ATA,            /* ATA device */
 355        ATA_DEV_ATAPI,          /* ATAPI device */
 356        ATA_DEV_PMP,            /* Port Multiplier Port */
 357        ATA_DEV_UNKNOWN,        /* unknown */
 358};
 359
 360struct ata_taskfile {
 361        unsigned long           flags;          /* ATA_TFLAG_xxx */
 362        u8                      protocol;       /* ATA_PROT_xxx */
 363
 364        u8                      ctl;            /* control reg */
 365
 366        u8                      hob_feature;    /* additional data */
 367        u8                      hob_nsect;      /* to support LBA48 */
 368        u8                      hob_lbal;
 369        u8                      hob_lbam;
 370        u8                      hob_lbah;
 371
 372        u8                      feature;
 373        u8                      nsect;
 374        u8                      lbal;
 375        u8                      lbam;
 376        u8                      lbah;
 377
 378        u8                      device;
 379
 380        u8                      command;        /* IO operation */
 381};
 382
 383/*
 384 * protocol tests
 385 */
 386static inline unsigned int ata_prot_flags(u8 prot)
 387{
 388        switch (prot) {
 389        case ATA_PROT_NODATA:
 390                return 0;
 391        case ATA_PROT_PIO:
 392                return ATA_PROT_FLAG_PIO;
 393        case ATA_PROT_DMA:
 394                return ATA_PROT_FLAG_DMA;
 395        case ATA_PROT_NCQ:
 396                return ATA_PROT_FLAG_DMA | ATA_PROT_FLAG_NCQ;
 397        case ATAPI_PROT_NODATA:
 398                return ATA_PROT_FLAG_ATAPI;
 399        case ATAPI_PROT_PIO:
 400                return ATA_PROT_FLAG_ATAPI | ATA_PROT_FLAG_PIO;
 401        case ATAPI_PROT_DMA:
 402                return ATA_PROT_FLAG_ATAPI | ATA_PROT_FLAG_DMA;
 403        }
 404        return 0;
 405}
 406
 407static inline int ata_is_atapi(u8 prot)
 408{
 409        return ata_prot_flags(prot) & ATA_PROT_FLAG_ATAPI;
 410}
 411
 412static inline int ata_is_nodata(u8 prot)
 413{
 414        return !(ata_prot_flags(prot) & ATA_PROT_FLAG_DATA);
 415}
 416
 417static inline int ata_is_pio(u8 prot)
 418{
 419        return ata_prot_flags(prot) & ATA_PROT_FLAG_PIO;
 420}
 421
 422static inline int ata_is_dma(u8 prot)
 423{
 424        return ata_prot_flags(prot) & ATA_PROT_FLAG_DMA;
 425}
 426
 427static inline int ata_is_ncq(u8 prot)
 428{
 429        return ata_prot_flags(prot) & ATA_PROT_FLAG_NCQ;
 430}
 431
 432static inline int ata_is_data(u8 prot)
 433{
 434        return ata_prot_flags(prot) & ATA_PROT_FLAG_DATA;
 435}
 436
 437/*
 438 * id tests
 439 */
 440#define ata_id_is_ata(id)               (((id)[0] & (1 << 15)) == 0)
 441#define ata_id_has_lba(id)              ((id)[49] & (1 << 9))
 442#define ata_id_has_dma(id)              ((id)[49] & (1 << 8))
 443#define ata_id_has_ncq(id)              ((id)[76] & (1 << 8))
 444#define ata_id_queue_depth(id)          (((id)[75] & 0x1f) + 1)
 445#define ata_id_removeable(id)           ((id)[0] & (1 << 7))
 446#define ata_id_iordy_disable(id)        ((id)[49] & (1 << 10))
 447#define ata_id_has_iordy(id)            ((id)[49] & (1 << 11))
 448
 449#define ata_id_u32(id,n)        \
 450        (((u32) (id)[(n) + 1] << 16) | ((u32) (id)[(n)]))
 451#define ata_id_u64(id,n)        \
 452        ( ((u64) (id)[(n) + 3] << 48) | \
 453          ((u64) (id)[(n) + 2] << 32) | \
 454          ((u64) (id)[(n) + 1] << 16) | \
 455          ((u64) (id)[(n) + 0]) )
 456
 457#define ata_id_cdb_intr(id)             (((id)[0] & 0x60) == 0x20)
 458
 459static inline int ata_id_has_fua(const u16 *id)
 460{
 461        if ((id[84] & 0xC000) != 0x4000)
 462                return 0;
 463        return id[84] & (1 << 6);
 464}
 465
 466static inline int ata_id_has_flush(const u16 *id)
 467{
 468        if ((id[83] & 0xC000) != 0x4000)
 469                return 0;
 470        return id[83] & (1 << 12);
 471}
 472
 473static inline int ata_id_has_flush_ext(const u16 *id)
 474{
 475        if ((id[83] & 0xC000) != 0x4000)
 476                return 0;
 477        return id[83] & (1 << 13);
 478}
 479
 480static inline int ata_id_has_lba48(const u16 *id)
 481{
 482        if ((id[83] & 0xC000) != 0x4000)
 483                return 0;
 484        if (!ata_id_u64(id, 100))
 485                return 0;
 486        return id[83] & (1 << 10);
 487}
 488
 489static inline int ata_id_hpa_enabled(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        /* And 87 covers 85-87 */
 495        if ((id[87] & 0xC000) != 0x4000)
 496                return 0;
 497        /* Check command sets enabled as well as supported */
 498        if ((id[85] & ( 1 << 10)) == 0)
 499                return 0;
 500        return id[82] & (1 << 10);
 501}
 502
 503static inline int ata_id_has_wcache(const u16 *id)
 504{
 505        /* Yes children, word 83 valid bits cover word 82 data */
 506        if ((id[83] & 0xC000) != 0x4000)
 507                return 0;
 508        return id[82] & (1 << 5);
 509}
 510
 511static inline int ata_id_has_pm(const u16 *id)
 512{
 513        if ((id[83] & 0xC000) != 0x4000)
 514                return 0;
 515        return id[82] & (1 << 3);
 516}
 517
 518static inline int ata_id_rahead_enabled(const u16 *id)
 519{
 520        if ((id[87] & 0xC000) != 0x4000)
 521                return 0;
 522        return id[85] & (1 << 6);
 523}
 524
 525static inline int ata_id_wcache_enabled(const u16 *id)
 526{
 527        if ((id[87] & 0xC000) != 0x4000)
 528                return 0;
 529        return id[85] & (1 << 5);
 530}
 531
 532static inline unsigned int ata_id_major_version(const u16 *id)
 533{
 534        unsigned int mver;
 535
 536        if (id[ATA_ID_MAJOR_VER] == 0xFFFF)
 537                return 0;
 538
 539        for (mver = 14; mver >= 1; mver--)
 540                if (id[ATA_ID_MAJOR_VER] & (1 << mver))
 541                        break;
 542        return mver;
 543}
 544
 545static inline int ata_id_is_sata(const u16 *id)
 546{
 547        return ata_id_major_version(id) >= 5 && id[93] == 0;
 548}
 549
 550static inline int ata_id_has_tpm(const u16 *id)
 551{
 552        /* The TPM bits are only valid on ATA8 */
 553        if (ata_id_major_version(id) < 8)
 554                return 0;
 555        if ((id[48] & 0xC000) != 0x4000)
 556                return 0;
 557        return id[48] & (1 << 0);
 558}
 559
 560static inline int ata_id_has_dword_io(const u16 *id)
 561{
 562        /* ATA 8 reuses this flag for "trusted" computing */
 563        if (ata_id_major_version(id) > 7)
 564                return 0;
 565        if (id[48] & (1 << 0))
 566                return 1;
 567        return 0;
 568}
 569
 570static inline int ata_id_current_chs_valid(const u16 *id)
 571{
 572        /* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command
 573           has not been issued to the device then the values of
 574           id[54] to id[56] are vendor specific. */
 575        return (id[53] & 0x01) && /* Current translation valid */
 576                id[54] &&  /* cylinders in current translation */
 577                id[55] &&  /* heads in current translation */
 578                id[55] <= 16 &&
 579                id[56];    /* sectors in current translation */
 580}
 581
 582static inline int ata_id_is_cfa(const u16 *id)
 583{
 584        u16 v = id[0];
 585        if (v == 0x848A)        /* Standard CF */
 586                return 1;
 587        /* Could be CF hiding as standard ATA */
 588        if (ata_id_major_version(id) >= 3 &&  id[82] != 0xFFFF &&
 589                        (id[82] & ( 1 << 2)))
 590                return 1;
 591        return 0;
 592}
 593
 594static inline int ata_drive_40wire(const u16 *dev_id)
 595{
 596        if (ata_id_is_sata(dev_id))
 597                return 0;       /* SATA */
 598        if ((dev_id[93] & 0xE000) == 0x6000)
 599                return 0;       /* 80 wire */
 600        return 1;
 601}
 602
 603static inline int ata_drive_40wire_relaxed(const u16 *dev_id)
 604{
 605        if ((dev_id[93] & 0x2000) == 0x2000)
 606                return 0;       /* 80 wire */
 607        return 1;
 608}
 609
 610static inline int atapi_cdb_len(const u16 *dev_id)
 611{
 612        u16 tmp = dev_id[0] & 0x3;
 613        switch (tmp) {
 614        case 0:         return 12;
 615        case 1:         return 16;
 616        default:        return -1;
 617        }
 618}
 619
 620static inline int atapi_command_packet_set(const u16 *dev_id)
 621{
 622        return (dev_id[0] >> 8) & 0x1f;
 623}
 624
 625static inline int atapi_id_dmadir(const u16 *dev_id)
 626{
 627        return ata_id_major_version(dev_id) >= 7 && (dev_id[62] & 0x8000);
 628}
 629
 630static inline int is_multi_taskfile(struct ata_taskfile *tf)
 631{
 632        return (tf->command == ATA_CMD_READ_MULTI) ||
 633               (tf->command == ATA_CMD_WRITE_MULTI) ||
 634               (tf->command == ATA_CMD_READ_MULTI_EXT) ||
 635               (tf->command == ATA_CMD_WRITE_MULTI_EXT) ||
 636               (tf->command == ATA_CMD_WRITE_MULTI_FUA_EXT);
 637}
 638
 639static inline int ata_ok(u8 status)
 640{
 641        return ((status & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | ATA_ERR))
 642                        == ATA_DRDY);
 643}
 644
 645static inline int lba_28_ok(u64 block, u32 n_block)
 646{
 647        /* check the ending block number */
 648        return ((block + n_block - 1) < ((u64)1 << 28)) && (n_block <= 256);
 649}
 650
 651static inline int lba_48_ok(u64 block, u32 n_block)
 652{
 653        /* check the ending block number */
 654        return ((block + n_block - 1) < ((u64)1 << 48)) && (n_block <= 65536);
 655}
 656
 657#define sata_pmp_gscr_vendor(gscr)      ((gscr)[SATA_PMP_GSCR_PROD_ID] & 0xffff)
 658#define sata_pmp_gscr_devid(gscr)       ((gscr)[SATA_PMP_GSCR_PROD_ID] >> 16)
 659#define sata_pmp_gscr_rev(gscr)         (((gscr)[SATA_PMP_GSCR_REV] >> 8) & 0xff)
 660#define sata_pmp_gscr_ports(gscr)       ((gscr)[SATA_PMP_GSCR_PORT_INFO] & 0xf)
 661
 662u64 ata_id_n_sectors(u16 *id);
 663u32 ata_dev_classify(u32 sig);
 664void ata_id_c_string(const u16 *id, unsigned char *s,
 665                         unsigned int ofs, unsigned int len);
 666void ata_dump_id(u16 *id);
 667void ata_swap_buf_le16(u16 *buf, unsigned int buf_words);
 668
 669#endif /* __LIBATA_H__ */
 670