include/linux/ata.h

   1
   2 /*
   3    Copyright 2003-2004 Red Hat, Inc.  All rights reserved.
   4    Copyright 2003-2004 Jeff Garzik
   5
   6    The contents of this file are subject to the Open
   7    Software License version 1.1 that can be found at
   8    http://www.opensource.org/licenses/osl-1.1.txt and is included herein
   9    by reference.
  10
  11    Alternatively, the contents of this file may be used under the terms
  12    of the GNU General Public License version 2 (the "GPL") as distributed
  13    in the kernel source COPYING file, in which case the provisions of
  14    the GPL are applicable instead of the above.  If you wish to allow
  15    the use of your version of this file only under the terms of the
  16    GPL and not to allow others to use your version of this file under
  17    the OSL, indicate your decision by deleting the provisions above and
  18    replace them with the notice and other provisions required by the GPL.
  19    If you do not delete the provisions above, a recipient may use your
  20    version of this file under either the OSL or the GPL.
  21
  22  */
  23
  24 #ifndef __LINUX_ATA_H__
  25 #define __LINUX_ATA_H__
  26
  27 #include <linux/types.h>
  28
  29 /* defines only for the constants which don't work well as enums */
  30 #define ATA_DMA_BOUNDARY        0xffffUL
  31 #define ATA_DMA_MASK            0xffffffffULL
  32
  33 enum {
  34         /* various global constants */
  35         ATA_MAX_DEVICES         = 2,    /* per bus/port */
  36         ATA_MAX_PRD             = 256,  /* we could make these 256/256 */
  37         ATA_SECT_SIZE           = 512,
  38
  39         ATA_ID_WORDS            = 256,
  40         ATA_ID_PROD_OFS         = 27,
  41         ATA_ID_FW_REV_OFS       = 23,
  42         ATA_ID_SERNO_OFS        = 10,
  43         ATA_ID_MAJOR_VER        = 80,
  44         ATA_ID_PIO_MODES        = 64,
  45         ATA_ID_MWDMA_MODES      = 63,
  46         ATA_ID_UDMA_MODES       = 88,
  47         ATA_ID_PIO4             = (1 << 1),
  48
  49         ATA_PCI_CTL_OFS         = 2,
  50         ATA_SERNO_LEN           = 20,
  51         ATA_UDMA0               = (1 << 0),
  52         ATA_UDMA1               = ATA_UDMA0 | (1 << 1),
  53         ATA_UDMA2               = ATA_UDMA1 | (1 << 2),
  54         ATA_UDMA3               = ATA_UDMA2 | (1 << 3),
  55         ATA_UDMA4               = ATA_UDMA3 | (1 << 4),
  56         ATA_UDMA5               = ATA_UDMA4 | (1 << 5),
  57         ATA_UDMA6               = ATA_UDMA5 | (1 << 6),
  58         ATA_UDMA7               = ATA_UDMA6 | (1 << 7),
  59         /* ATA_UDMA7 is just for completeness... doesn't exist (yet?).  */
  60
  61         ATA_UDMA_MASK_40C       = ATA_UDMA2,    /* udma0-2 */
  62
  63         /* DMA-related */
  64         ATA_PRD_SZ              = 8,
  65         ATA_PRD_TBL_SZ          = (ATA_MAX_PRD * ATA_PRD_SZ),
  66         ATA_PRD_EOT             = (1 << 31),    /* end-of-table flag */
  67
  68         ATA_DMA_TABLE_OFS       = 4,
  69         ATA_DMA_STATUS          = 2,
  70         ATA_DMA_CMD             = 0,
  71         ATA_DMA_WR              = (1 << 3),
  72         ATA_DMA_START           = (1 << 0),
  73         ATA_DMA_INTR            = (1 << 2),
  74         ATA_DMA_ERR             = (1 << 1),
  75         ATA_DMA_ACTIVE          = (1 << 0),
  76
  77         /* bits in ATA command block registers */
  78         ATA_HOB                 = (1 << 7),     /* LBA48 selector */
  79         ATA_NIEN                = (1 << 1),     /* disable-irq flag */
  80         ATA_LBA                 = (1 << 6),     /* LBA28 selector */
  81         ATA_DEV1                = (1 << 4),     /* Select Device 1 (slave) */
  82         ATA_DEVICE_OBS          = (1 << 7) | (1 << 5), /* obs bits in dev reg */
  83         ATA_DEVCTL_OBS          = (1 << 3),     /* obsolete bit in devctl reg */
  84         ATA_BUSY                = (1 << 7),     /* BSY status bit */
  85         ATA_DRDY                = (1 << 6),     /* device ready */
  86         ATA_DF                  = (1 << 5),     /* device fault */
  87         ATA_DRQ                 = (1 << 3),     /* data request i/o */
  88         ATA_ERR                 = (1 << 0),     /* have an error */
  89         ATA_SRST                = (1 << 2),     /* software reset */
  90         ATA_ABORTED             = (1 << 2),     /* command aborted */
  91
  92         /* ATA command block registers */
  93         ATA_REG_DATA            = 0x00,
  94         ATA_REG_ERR             = 0x01,
  95         ATA_REG_NSECT           = 0x02,
  96         ATA_REG_LBAL            = 0x03,
  97         ATA_REG_LBAM            = 0x04,
  98         ATA_REG_LBAH            = 0x05,
  99         ATA_REG_DEVICE          = 0x06,
 100         ATA_REG_STATUS          = 0x07,
 101
 102         ATA_REG_FEATURE         = ATA_REG_ERR, /* and their aliases */
 103         ATA_REG_CMD             = ATA_REG_STATUS,
 104         ATA_REG_BYTEL           = ATA_REG_LBAM,
 105         ATA_REG_BYTEH           = ATA_REG_LBAH,
 106         ATA_REG_DEVSEL          = ATA_REG_DEVICE,
 107         ATA_REG_IRQ             = ATA_REG_NSECT,
 108
 109         /* ATA device commands */
 110         ATA_CMD_CHK_POWER       = 0xE5, /* check power mode */
 111         ATA_CMD_EDD             = 0x90, /* execute device diagnostic */
 112         ATA_CMD_FLUSH           = 0xE7,
 113         ATA_CMD_FLUSH_EXT       = 0xEA,
 114         ATA_CMD_ID_ATA          = 0xEC,
 115         ATA_CMD_ID_ATAPI        = 0xA1,
 116         ATA_CMD_READ            = 0xC8,
 117         ATA_CMD_READ_EXT        = 0x25,
 118         ATA_CMD_WRITE           = 0xCA,
 119         ATA_CMD_WRITE_EXT       = 0x35,
 120         ATA_CMD_PIO_READ        = 0x20,
 121         ATA_CMD_PIO_READ_EXT    = 0x24,
 122         ATA_CMD_PIO_WRITE       = 0x30,
 123         ATA_CMD_PIO_WRITE_EXT   = 0x34,
 124         ATA_CMD_SET_FEATURES    = 0xEF,
 125         ATA_CMD_PACKET          = 0xA0,
 126         ATA_CMD_VERIFY          = 0x40,
 127         ATA_CMD_VERIFY_EXT      = 0x42,
 128
 129         /* SETFEATURES stuff */
 130         SETFEATURES_XFER        = 0x03,
 131         XFER_UDMA_7             = 0x47,
 132         XFER_UDMA_6             = 0x46,
 133         XFER_UDMA_5             = 0x45,
 134         XFER_UDMA_4             = 0x44,
 135         XFER_UDMA_3             = 0x43,
 136         XFER_UDMA_2             = 0x42,
 137         XFER_UDMA_1             = 0x41,
 138         XFER_UDMA_0             = 0x40,
 139         XFER_MW_DMA_2           = 0x22,
 140         XFER_MW_DMA_1           = 0x21,
 141         XFER_MW_DMA_0           = 0x20,
 142         XFER_PIO_4              = 0x0C,
 143         XFER_PIO_3              = 0x0B,
 144         XFER_PIO_2              = 0x0A,
 145         XFER_PIO_1              = 0x09,
 146         XFER_PIO_0              = 0x08,
 147         XFER_SW_DMA_2           = 0x12,
 148         XFER_SW_DMA_1           = 0x11,
 149         XFER_SW_DMA_0           = 0x10,
 150         XFER_PIO_SLOW           = 0x00,
 151
 152         /* ATAPI stuff */
 153         ATAPI_PKT_DMA           = (1 << 0),
 154         ATAPI_DMADIR            = (1 << 2),     /* ATAPI data dir:
 155                                                    0=to device, 1=to host */
 156         ATAPI_CDB_LEN           = 16,
 157
 158         /* cable types */
 159         ATA_CBL_NONE            = 0,
 160         ATA_CBL_PATA40          = 1,
 161         ATA_CBL_PATA80          = 2,
 162         ATA_CBL_PATA_UNK        = 3,
 163         ATA_CBL_SATA            = 4,
 164
 165         /* SATA Status and Control Registers */
 166         SCR_STATUS              = 0,
 167         SCR_ERROR               = 1,
 168         SCR_CONTROL             = 2,
 169         SCR_ACTIVE              = 3,
 170         SCR_NOTIFICATION        = 4,
 171
 172         /* struct ata_taskfile flags */
 173         ATA_TFLAG_LBA48         = (1 << 0), /* enable 48-bit LBA and "HOB" */
 174         ATA_TFLAG_ISADDR        = (1 << 1), /* enable r/w to nsect/lba regs */
 175         ATA_TFLAG_DEVICE        = (1 << 2), /* enable r/w to device reg */
 176         ATA_TFLAG_WRITE         = (1 << 3), /* data dir: host->dev==1 (write) */
 177 };
 178
 179 enum ata_tf_protocols {
 180         /* ATA taskfile protocols */
 181         ATA_PROT_UNKNOWN,       /* unknown/invalid */
 182         ATA_PROT_NODATA,        /* no data */
 183         ATA_PROT_PIO,           /* PIO single sector */
 184         ATA_PROT_PIO_MULT,      /* PIO multiple sector */
 185         ATA_PROT_DMA,           /* DMA */
 186         ATA_PROT_ATAPI,         /* packet command, PIO data xfer*/
 187         ATA_PROT_ATAPI_NODATA,  /* packet command, no data */
 188         ATA_PROT_ATAPI_DMA,     /* packet command with special DMA sauce */
 189 };
 190
 191 enum ata_ioctls {
 192         ATA_IOC_GET_IO32        = 0x309,
 193         ATA_IOC_SET_IO32        = 0x324,
 194 };
 195
 196 /* core structures */
 197
 198 struct ata_prd {
 199         u32                     addr;
 200         u32                     flags_len;
 201 };
 202
 203 struct ata_taskfile {
 204         unsigned long           flags;          /* ATA_TFLAG_xxx */
 205         u8                      protocol;       /* ATA_PROT_xxx */
 206
 207         u8                      ctl;            /* control reg */
 208
 209         u8                      hob_feature;    /* additional data */
 210         u8                      hob_nsect;      /* to support LBA48 */
 211         u8                      hob_lbal;
 212         u8                      hob_lbam;
 213         u8                      hob_lbah;
 214
 215         u8                      feature;
 216         u8                      nsect;
 217         u8                      lbal;
 218         u8                      lbam;
 219         u8                      lbah;
 220
 221         u8                      device;
 222
 223         u8                      command;        /* IO operation */
 224 };
 225
 226 #define ata_id_is_ata(id)       (((id)[0] & (1 << 15)) == 0)
 227 #define ata_id_is_sata(id)      ((id)[93] == 0)
 228 #define ata_id_rahead_enabled(id) ((id)[85] & (1 << 6))
 229 #define ata_id_wcache_enabled(id) ((id)[85] & (1 << 5))
 230 #define ata_id_has_flush(id) ((id)[83] & (1 << 12))
 231 #define ata_id_has_flush_ext(id) ((id)[83] & (1 << 13))
 232 #define ata_id_has_lba48(id)    ((id)[83] & (1 << 10))
 233 #define ata_id_has_wcache(id)   ((id)[82] & (1 << 5))
 234 #define ata_id_has_pm(id)       ((id)[82] & (1 << 3))
 235 #define ata_id_has_lba(id)      ((id)[49] & (1 << 9))
 236 #define ata_id_has_dma(id)      ((id)[49] & (1 << 8))
 237 #define ata_id_removeable(id)   ((id)[0] & (1 << 7))
 238 #define ata_id_u32(id,n)        \
 239         (((u32) (id)[(n) + 1] << 16) | ((u32) (id)[(n)]))
 240 #define ata_id_u64(id,n)        \
 241         ( ((u64) (id)[(n) + 3] << 48) | \
 242           ((u64) (id)[(n) + 2] << 32) | \
 243           ((u64) (id)[(n) + 1] << 16) | \
 244           ((u64) (id)[(n) + 0]) )
 245
 246 static inline int atapi_cdb_len(u16 *dev_id)
 247 {
 248         u16 tmp = dev_id[0] & 0x3;
 249         switch (tmp) {
 250         case 0:         return 12;
 251         case 1:         return 16;
 252         default:        return -1;
 253         }
 254 }
 255
 256 static inline int is_atapi_taskfile(struct ata_taskfile *tf)
 257 {
 258         return (tf->protocol == ATA_PROT_ATAPI) ||
 259                (tf->protocol == ATA_PROT_ATAPI_NODATA) ||
 260                (tf->protocol == ATA_PROT_ATAPI_DMA);
 261 }
 262
 263 static inline int ata_ok(u8 status)
 264 {
 265         return ((status & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | ATA_ERR))
 266                         == ATA_DRDY);
 267 }
 268
 269 #endif /* __LINUX_ATA_H__ */