+enum {
+ /* various global constants */
+ ATA_MAX_DEVICES = 2, /* per bus/port */
+ ATA_MAX_PRD = 256, /* we could make these 256/256 */
+ ATA_SECT_SIZE = 512,
+ ATA_MAX_SECTORS_128 = 128,
+ ATA_MAX_SECTORS = 256,
+ ATA_MAX_SECTORS_LBA48 = 65535,
+ ATA_MAX_SECTORS_TAPE = 65535,
+
+ ATA_ID_WORDS = 256,
+ ATA_ID_SERNO = 10,
+ ATA_ID_FW_REV = 23,
+ ATA_ID_PROD = 27,
+ ATA_ID_OLD_PIO_MODES = 51,
+ ATA_ID_FIELD_VALID = 53,
+ ATA_ID_LBA_SECTORS = 60,
+ ATA_ID_MWDMA_MODES = 63,
+ ATA_ID_PIO_MODES = 64,
+ ATA_ID_EIDE_DMA_MIN = 65,
+ ATA_ID_EIDE_PIO = 67,
+ ATA_ID_EIDE_PIO_IORDY = 68,
+ ATA_ID_PIO4 = (1 << 1),
+ ATA_ID_QUEUE_DEPTH = 75,
+ ATA_ID_SATA_CAP = 76,
+ ATA_ID_SATA_FEATURES = 78,
+ ATA_ID_SATA_FEATURES_EN = 79,
+ ATA_ID_MAJOR_VER = 80,
+ ATA_ID_MINOR_VER = 81,
+ ATA_ID_UDMA_MODES = 88,
+ ATA_ID_LBA48_SECTORS = 100,
+
+ ATA_ID_SERNO_LEN = 20,
+ ATA_ID_FW_REV_LEN = 8,
+ ATA_ID_PROD_LEN = 40,
+
+ ATA_PCI_CTL_OFS = 2,
+
+ ATA_PIO0 = (1 << 0),
+ ATA_PIO1 = ATA_PIO0 | (1 << 1),
+ ATA_PIO2 = ATA_PIO1 | (1 << 2),
+ ATA_PIO3 = ATA_PIO2 | (1 << 3),
+ ATA_PIO4 = ATA_PIO3 | (1 << 4),
+ ATA_PIO5 = ATA_PIO4 | (1 << 5),
+ ATA_PIO6 = ATA_PIO5 | (1 << 6),
+
+ ATA_SWDMA0 = (1 << 0),
+ ATA_SWDMA1 = ATA_SWDMA0 | (1 << 1),
+ ATA_SWDMA2 = ATA_SWDMA1 | (1 << 2),
+
+ ATA_SWDMA2_ONLY = (1 << 2),
+
+ ATA_MWDMA0 = (1 << 0),
+ ATA_MWDMA1 = ATA_MWDMA0 | (1 << 1),
+ ATA_MWDMA2 = ATA_MWDMA1 | (1 << 2),
+
+ ATA_MWDMA12_ONLY = (1 << 1) | (1 << 2),
+ ATA_MWDMA2_ONLY = (1 << 2),
+
+ ATA_UDMA0 = (1 << 0),
+ ATA_UDMA1 = ATA_UDMA0 | (1 << 1),
+ ATA_UDMA2 = ATA_UDMA1 | (1 << 2),
+ ATA_UDMA3 = ATA_UDMA2 | (1 << 3),
+ ATA_UDMA4 = ATA_UDMA3 | (1 << 4),
+ ATA_UDMA5 = ATA_UDMA4 | (1 << 5),
+ ATA_UDMA6 = ATA_UDMA5 | (1 << 6),
+ ATA_UDMA7 = ATA_UDMA6 | (1 << 7),
+ /* ATA_UDMA7 is just for completeness... doesn't exist (yet?). */
+
+ ATA_UDMA_MASK_40C = ATA_UDMA2, /* udma0-2 */
+
+ /* DMA-related */
+ ATA_PRD_SZ = 8,
+ ATA_PRD_TBL_SZ = (ATA_MAX_PRD * ATA_PRD_SZ),
+ ATA_PRD_EOT = (1 << 31), /* end-of-table flag */
+
+ ATA_DMA_TABLE_OFS = 4,
+ ATA_DMA_STATUS = 2,
+ ATA_DMA_CMD = 0,
+ ATA_DMA_WR = (1 << 3),
+ ATA_DMA_START = (1 << 0),
+ ATA_DMA_INTR = (1 << 2),
+ ATA_DMA_ERR = (1 << 1),
+ ATA_DMA_ACTIVE = (1 << 0),
+
+ /* bits in ATA command block registers */
+ ATA_HOB = (1 << 7), /* LBA48 selector */
+ ATA_NIEN = (1 << 1), /* disable-irq flag */
+ ATA_LBA = (1 << 6), /* LBA28 selector */
+ ATA_DEV1 = (1 << 4), /* Select Device 1 (slave) */
+ ATA_DEVICE_OBS = (1 << 7) | (1 << 5), /* obs bits in dev reg */
+ ATA_DEVCTL_OBS = (1 << 3), /* obsolete bit in devctl reg */
+ ATA_BUSY = (1 << 7), /* BSY status bit */
+ ATA_DRDY = (1 << 6), /* device ready */
+ ATA_DF = (1 << 5), /* device fault */
+ ATA_DRQ = (1 << 3), /* data request i/o */
+ ATA_ERR = (1 << 0), /* have an error */
+ ATA_SRST = (1 << 2), /* software reset */
+ ATA_ICRC = (1 << 7), /* interface CRC error */
+ ATA_UNC = (1 << 6), /* uncorrectable media error */
+ ATA_IDNF = (1 << 4), /* ID not found */
+ ATA_ABORTED = (1 << 2), /* command aborted */
+
+ /* ATA command block registers */
+ ATA_REG_DATA = 0x00,
+ ATA_REG_ERR = 0x01,
+ ATA_REG_NSECT = 0x02,
+ ATA_REG_LBAL = 0x03,
+ ATA_REG_LBAM = 0x04,
+ ATA_REG_LBAH = 0x05,
+ ATA_REG_DEVICE = 0x06,
+ ATA_REG_STATUS = 0x07,
+
+ ATA_REG_FEATURE = ATA_REG_ERR, /* and their aliases */
+ ATA_REG_CMD = ATA_REG_STATUS,
+ ATA_REG_BYTEL = ATA_REG_LBAM,
+ ATA_REG_BYTEH = ATA_REG_LBAH,
+ ATA_REG_DEVSEL = ATA_REG_DEVICE,
+ ATA_REG_IRQ = ATA_REG_NSECT,
+
+ /* ATA device commands */
+ ATA_CMD_DEV_RESET = 0x08, /* ATAPI device reset */
+ ATA_CMD_CHK_POWER = 0xE5, /* check power mode */
+ ATA_CMD_STANDBY = 0xE2, /* place in standby power mode */
+ ATA_CMD_IDLE = 0xE3, /* place in idle power mode */
+ ATA_CMD_EDD = 0x90, /* execute device diagnostic */
+ ATA_CMD_FLUSH = 0xE7,
+ ATA_CMD_FLUSH_EXT = 0xEA,
+ ATA_CMD_ID_ATA = 0xEC,
+ ATA_CMD_ID_ATAPI = 0xA1,
+ ATA_CMD_READ = 0xC8,
+ ATA_CMD_READ_EXT = 0x25,
+ ATA_CMD_WRITE = 0xCA,
+ ATA_CMD_WRITE_EXT = 0x35,
+ ATA_CMD_WRITE_FUA_EXT = 0x3D,
+ ATA_CMD_FPDMA_READ = 0x60,
+ ATA_CMD_FPDMA_WRITE = 0x61,
+ ATA_CMD_PIO_READ = 0x20,
+ ATA_CMD_PIO_READ_EXT = 0x24,
+ ATA_CMD_PIO_WRITE = 0x30,
+ ATA_CMD_PIO_WRITE_EXT = 0x34,
+ ATA_CMD_READ_MULTI = 0xC4,
+ ATA_CMD_READ_MULTI_EXT = 0x29,
+ ATA_CMD_WRITE_MULTI = 0xC5,
+ ATA_CMD_WRITE_MULTI_EXT = 0x39,
+ ATA_CMD_WRITE_MULTI_FUA_EXT = 0xCE,
+ ATA_CMD_SET_FEATURES = 0xEF,
+ ATA_CMD_SET_MULTI = 0xC6,
+ ATA_CMD_PACKET = 0xA0,
+ ATA_CMD_VERIFY = 0x40,
+ ATA_CMD_VERIFY_EXT = 0x42,
+ ATA_CMD_STANDBYNOW1 = 0xE0,
+ ATA_CMD_IDLEIMMEDIATE = 0xE1,
+ ATA_CMD_SLEEP = 0xE6,
+ ATA_CMD_INIT_DEV_PARAMS = 0x91,
+ ATA_CMD_READ_NATIVE_MAX = 0xF8,
+ ATA_CMD_READ_NATIVE_MAX_EXT = 0x27,
+ ATA_CMD_SET_MAX = 0xF9,
+ ATA_CMD_SET_MAX_EXT = 0x37,
+ ATA_CMD_READ_LOG_EXT = 0x2f,
+ ATA_CMD_PMP_READ = 0xE4,
+ ATA_CMD_PMP_WRITE = 0xE8,
+ ATA_CMD_CONF_OVERLAY = 0xB1,
+ ATA_CMD_SEC_FREEZE_LOCK = 0xF5,
+
+ /* READ_LOG_EXT pages */
+ ATA_LOG_SATA_NCQ = 0x10,
+
+ /* READ/WRITE LONG (obsolete) */
+ ATA_CMD_READ_LONG = 0x22,
+ ATA_CMD_READ_LONG_ONCE = 0x23,
+ ATA_CMD_WRITE_LONG = 0x32,
+ ATA_CMD_WRITE_LONG_ONCE = 0x33,