include/linux/ata.h

   1
   2 /*
   3  *  Copyright 2003-2004 Red Hat, Inc.  All rights reserved.
   4  *  Copyright 2003-2004 Jeff Garzik
   5  *
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 2, or (at your option)
  10  *  any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; see the file COPYING.  If not, write to
  19  *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  *
  22  *  libata documentation is available via 'make {ps|pdf}docs',
  23  *  as Documentation/DocBook/libata.*
  24  *
  25  *  Hardware documentation available from http://www.t13.org/
  26  *
  27  */
  28
  29 #ifndef __LINUX_ATA_H__
  30 #define __LINUX_ATA_H__
  31
  32 #include <linux/types.h>
  33
  34 /* defines only for the constants which don't work well as enums */
  35 #define ATA_DMA_BOUNDARY        0xffffUL
  36 #define ATA_DMA_MASK            0xffffffffULL
  37
  38 enum {
  39         /* various global constants */
  40         ATA_MAX_DEVICES         = 2,    /* per bus/port */
  41         ATA_MAX_PRD             = 256,  /* we could make these 256/256 */
  42         ATA_SECT_SIZE           = 512,
  43
  44         ATA_ID_WORDS            = 256,
  45         ATA_ID_PROD_OFS         = 27,
  46         ATA_ID_FW_REV_OFS       = 23,
  47         ATA_ID_SERNO_OFS        = 10,
  48         ATA_ID_MAJOR_VER        = 80,
  49         ATA_ID_PIO_MODES        = 64,
  50         ATA_ID_MWDMA_MODES      = 63,
  51         ATA_ID_UDMA_MODES       = 88,
  52         ATA_ID_PIO4             = (1 << 1),
  53
  54         ATA_PCI_CTL_OFS         = 2,
  55         ATA_SERNO_LEN           = 20,
  56         ATA_UDMA0               = (1 << 0),
  57         ATA_UDMA1               = ATA_UDMA0 | (1 << 1),
  58         ATA_UDMA2               = ATA_UDMA1 | (1 << 2),
  59         ATA_UDMA3               = ATA_UDMA2 | (1 << 3),
  60         ATA_UDMA4               = ATA_UDMA3 | (1 << 4),
  61         ATA_UDMA5               = ATA_UDMA4 | (1 << 5),
  62         ATA_UDMA6               = ATA_UDMA5 | (1 << 6),
  63         ATA_UDMA7               = ATA_UDMA6 | (1 << 7),
  64         /* ATA_UDMA7 is just for completeness... doesn't exist (yet?).  */
  65
  66         ATA_UDMA_MASK_40C       = ATA_UDMA2,    /* udma0-2 */
  67
  68         /* DMA-related */
  69         ATA_PRD_SZ              = 8,
  70         ATA_PRD_TBL_SZ          = (ATA_MAX_PRD * ATA_PRD_SZ),
  71         ATA_PRD_EOT             = (1 << 31),    /* end-of-table flag */
  72
  73         ATA_DMA_TABLE_OFS       = 4,
  74         ATA_DMA_STATUS          = 2,
  75         ATA_DMA_CMD             = 0,
  76         ATA_DMA_WR              = (1 << 3),
  77         ATA_DMA_START           = (1 << 0),
  78         ATA_DMA_INTR            = (1 << 2),
  79         ATA_DMA_ERR             = (1 << 1),
  80         ATA_DMA_ACTIVE          = (1 << 0),
  81
  82         /* bits in ATA command block registers */
  83         ATA_HOB                 = (1 << 7),     /* LBA48 selector */
  84         ATA_NIEN                = (1 << 1),     /* disable-irq flag */
  85         ATA_LBA                 = (1 << 6),     /* LBA28 selector */
  86         ATA_DEV1                = (1 << 4),     /* Select Device 1 (slave) */
  87         ATA_DEVICE_OBS          = (1 << 7) | (1 << 5), /* obs bits in dev reg */
  88         ATA_DEVCTL_OBS          = (1 << 3),     /* obsolete bit in devctl reg */
  89         ATA_BUSY                = (1 << 7),     /* BSY status bit */
  90         ATA_DRDY                = (1 << 6),     /* device ready */
  91         ATA_DF                  = (1 << 5),     /* device fault */
  92         ATA_DRQ                 = (1 << 3),     /* data request i/o */
  93         ATA_ERR                 = (1 << 0),     /* have an error */
  94         ATA_SRST                = (1 << 2),     /* software reset */
  95         ATA_ABORTED             = (1 << 2),     /* command aborted */
  96
  97         /* ATA command block registers */
  98         ATA_REG_DATA            = 0x00,
  99         ATA_REG_ERR             = 0x01,
 100         ATA_REG_NSECT           = 0x02,
 101         ATA_REG_LBAL            = 0x03,
 102         ATA_REG_LBAM            = 0x04,
 103         ATA_REG_LBAH            = 0x05,
 104         ATA_REG_DEVICE          = 0x06,
 105         ATA_REG_STATUS          = 0x07,
 106
 107         ATA_REG_FEATURE         = ATA_REG_ERR, /* and their aliases */
 108         ATA_REG_CMD             = ATA_REG_STATUS,
 109         ATA_REG_BYTEL           = ATA_REG_LBAM,
 110         ATA_REG_BYTEH           = ATA_REG_LBAH,
 111         ATA_REG_DEVSEL          = ATA_REG_DEVICE,
 112         ATA_REG_IRQ             = ATA_REG_NSECT,
 113
 114         /* ATA device commands */
 115         ATA_CMD_CHK_POWER       = 0xE5, /* check power mode */
 116         ATA_CMD_STANDBY         = 0xE2, /* place in standby power mode */
 117         ATA_CMD_IDLE            = 0xE3, /* place in idle power mode */
 118         ATA_CMD_EDD             = 0x90, /* execute device diagnostic */
 119         ATA_CMD_FLUSH           = 0xE7,
 120         ATA_CMD_FLUSH_EXT       = 0xEA,
 121         ATA_CMD_ID_ATA          = 0xEC,
 122         ATA_CMD_ID_ATAPI        = 0xA1,
 123         ATA_CMD_READ            = 0xC8,
 124         ATA_CMD_READ_EXT        = 0x25,
 125         ATA_CMD_WRITE           = 0xCA,
 126         ATA_CMD_WRITE_EXT       = 0x35,
 127         ATA_CMD_PIO_READ        = 0x20,
 128         ATA_CMD_PIO_READ_EXT    = 0x24,
 129         ATA_CMD_PIO_WRITE       = 0x30,
 130         ATA_CMD_PIO_WRITE_EXT   = 0x34,
 131         ATA_CMD_SET_FEATURES    = 0xEF,
 132         ATA_CMD_PACKET          = 0xA0,
 133         ATA_CMD_VERIFY          = 0x40,
 134         ATA_CMD_VERIFY_EXT      = 0x42,
 135
 136         /* SETFEATURES stuff */
 137         SETFEATURES_XFER        = 0x03,
 138         XFER_UDMA_7             = 0x47,
 139         XFER_UDMA_6             = 0x46,
 140         XFER_UDMA_5             = 0x45,
 141         XFER_UDMA_4             = 0x44,
 142         XFER_UDMA_3             = 0x43,
 143         XFER_UDMA_2             = 0x42,
 144         XFER_UDMA_1             = 0x41,
 145         XFER_UDMA_0             = 0x40,
 146         XFER_MW_DMA_2           = 0x22,
 147         XFER_MW_DMA_1           = 0x21,
 148         XFER_MW_DMA_0           = 0x20,
 149         XFER_PIO_4              = 0x0C,
 150         XFER_PIO_3              = 0x0B,
 151         XFER_PIO_2              = 0x0A,
 152         XFER_PIO_1              = 0x09,
 153         XFER_PIO_0              = 0x08,
 154         XFER_SW_DMA_2           = 0x12,
 155         XFER_SW_DMA_1           = 0x11,
 156         XFER_SW_DMA_0           = 0x10,
 157         XFER_PIO_SLOW           = 0x00,
 158
 159         /* ATAPI stuff */
 160         ATAPI_PKT_DMA           = (1 << 0),
 161         ATAPI_DMADIR            = (1 << 2),     /* ATAPI data dir:
 162                                                    0=to device, 1=to host */
 163         ATAPI_CDB_LEN           = 16,
 164
 165         /* cable types */
 166         ATA_CBL_NONE            = 0,
 167         ATA_CBL_PATA40          = 1,
 168         ATA_CBL_PATA80          = 2,
 169         ATA_CBL_PATA_UNK        = 3,
 170         ATA_CBL_SATA            = 4,
 171
 172         /* SATA Status and Control Registers */
 173         SCR_STATUS              = 0,
 174         SCR_ERROR               = 1,
 175         SCR_CONTROL             = 2,
 176         SCR_ACTIVE              = 3,
 177         SCR_NOTIFICATION        = 4,
 178
 179         /* struct ata_taskfile flags */
 180         ATA_TFLAG_LBA48         = (1 << 0), /* enable 48-bit LBA and "HOB" */
 181         ATA_TFLAG_ISADDR        = (1 << 1), /* enable r/w to nsect/lba regs */
 182         ATA_TFLAG_DEVICE        = (1 << 2), /* enable r/w to device reg */
 183         ATA_TFLAG_WRITE         = (1 << 3), /* data dir: host->dev==1 (write) */
 184 };
 185
 186 enum ata_tf_protocols {
 187         /* ATA taskfile protocols */
 188         ATA_PROT_UNKNOWN,       /* unknown/invalid */
 189         ATA_PROT_NODATA,        /* no data */
 190         ATA_PROT_PIO,           /* PIO single sector */
 191         ATA_PROT_PIO_MULT,      /* PIO multiple sector */
 192         ATA_PROT_DMA,           /* DMA */
 193         ATA_PROT_ATAPI,         /* packet command, PIO data xfer*/
 194         ATA_PROT_ATAPI_NODATA,  /* packet command, no data */
 195         ATA_PROT_ATAPI_DMA,     /* packet command with special DMA sauce */
 196 };
 197
 198 enum ata_ioctls {
 199         ATA_IOC_GET_IO32        = 0x309,
 200         ATA_IOC_SET_IO32        = 0x324,
 201 };
 202
 203 /* core structures */
 204
 205 struct ata_prd {
 206         u32                     addr;
 207         u32                     flags_len;
 208 };
 209
 210 struct ata_taskfile {
 211         unsigned long           flags;          /* ATA_TFLAG_xxx */
 212         u8                      protocol;       /* ATA_PROT_xxx */
 213
 214         u8                      ctl;            /* control reg */
 215
 216         u8                      hob_feature;    /* additional data */
 217         u8                      hob_nsect;      /* to support LBA48 */
 218         u8                      hob_lbal;
 219         u8                      hob_lbam;
 220         u8                      hob_lbah;
 221
 222         u8                      feature;
 223         u8                      nsect;
 224         u8                      lbal;
 225         u8                      lbam;
 226         u8                      lbah;
 227
 228         u8                      device;
 229
 230         u8                      command;        /* IO operation */
 231 };
 232
 233 #define ata_id_is_ata(id)       (((id)[0] & (1 << 15)) == 0)
 234 #define ata_id_is_sata(id)      ((id)[93] == 0)
 235 #define ata_id_rahead_enabled(id) ((id)[85] & (1 << 6))
 236 #define ata_id_wcache_enabled(id) ((id)[85] & (1 << 5))
 237 #define ata_id_has_flush(id) ((id)[83] & (1 << 12))
 238 #define ata_id_has_flush_ext(id) ((id)[83] & (1 << 13))
 239 #define ata_id_has_lba48(id)    ((id)[83] & (1 << 10))
 240 #define ata_id_has_wcache(id)   ((id)[82] & (1 << 5))
 241 #define ata_id_has_pm(id)       ((id)[82] & (1 << 3))
 242 #define ata_id_has_lba(id)      ((id)[49] & (1 << 9))
 243 #define ata_id_has_dma(id)      ((id)[49] & (1 << 8))
 244 #define ata_id_removeable(id)   ((id)[0] & (1 << 7))
 245 #define ata_id_u32(id,n)        \
 246         (((u32) (id)[(n) + 1] << 16) | ((u32) (id)[(n)]))
 247 #define ata_id_u64(id,n)        \
 248         ( ((u64) (id)[(n) + 3] << 48) | \
 249           ((u64) (id)[(n) + 2] << 32) | \
 250           ((u64) (id)[(n) + 1] << 16) | \
 251           ((u64) (id)[(n) + 0]) )
 252
 253 static inline int atapi_cdb_len(u16 *dev_id)
 254 {
 255         u16 tmp = dev_id[0] & 0x3;
 256         switch (tmp) {
 257         case 0:         return 12;
 258         case 1:         return 16;
 259         default:        return -1;
 260         }
 261 }
 262
 263 static inline int is_atapi_taskfile(struct ata_taskfile *tf)
 264 {
 265         return (tf->protocol == ATA_PROT_ATAPI) ||
 266                (tf->protocol == ATA_PROT_ATAPI_NODATA) ||
 267                (tf->protocol == ATA_PROT_ATAPI_DMA);
 268 }
 269
 270 static inline int ata_ok(u8 status)
 271 {
 272         return ((status & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | ATA_ERR))
 273                         == ATA_DRDY);
 274 }
 275
 276 #endif /* __LINUX_ATA_H__ */