include/libata.h

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