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_SERNO_OFS        = 10,
  46         ATA_ID_FW_REV_OFS       = 23,
  47         ATA_ID_PROD_OFS         = 27,
  48         ATA_ID_OLD_PIO_MODES    = 51,
  49         ATA_ID_FIELD_VALID      = 53,
  50         ATA_ID_MWDMA_MODES      = 63,
  51         ATA_ID_PIO_MODES        = 64,
  52         ATA_ID_EIDE_DMA_MIN     = 65,
  53         ATA_ID_EIDE_PIO         = 67,
  54         ATA_ID_EIDE_PIO_IORDY   = 68,
  55         ATA_ID_UDMA_MODES       = 88,
  56         ATA_ID_MAJOR_VER        = 80,
  57         ATA_ID_PIO4             = (1 << 1),
  58
  59         ATA_PCI_CTL_OFS         = 2,
  60         ATA_SERNO_LEN           = 20,
  61         ATA_UDMA0               = (1 << 0),
  62         ATA_UDMA1               = ATA_UDMA0 | (1 << 1),
  63         ATA_UDMA2               = ATA_UDMA1 | (1 << 2),
  64         ATA_UDMA3               = ATA_UDMA2 | (1 << 3),
  65         ATA_UDMA4               = ATA_UDMA3 | (1 << 4),
  66         ATA_UDMA5               = ATA_UDMA4 | (1 << 5),
  67         ATA_UDMA6               = ATA_UDMA5 | (1 << 6),
  68         ATA_UDMA7               = ATA_UDMA6 | (1 << 7),
  69         /* ATA_UDMA7 is just for completeness... doesn't exist (yet?).  */
  70
  71         ATA_UDMA_MASK_40C       = ATA_UDMA2,    /* udma0-2 */
  72
  73         /* DMA-related */
  74         ATA_PRD_SZ              = 8,
  75         ATA_PRD_TBL_SZ          = (ATA_MAX_PRD * ATA_PRD_SZ),
  76         ATA_PRD_EOT             = (1 << 31),    /* end-of-table flag */
  77
  78         ATA_DMA_TABLE_OFS       = 4,
  79         ATA_DMA_STATUS          = 2,
  80         ATA_DMA_CMD             = 0,
  81         ATA_DMA_WR              = (1 << 3),
  82         ATA_DMA_START           = (1 << 0),
  83         ATA_DMA_INTR            = (1 << 2),
  84         ATA_DMA_ERR             = (1 << 1),
  85         ATA_DMA_ACTIVE          = (1 << 0),
  86
  87         /* bits in ATA command block registers */
  88         ATA_HOB                 = (1 << 7),     /* LBA48 selector */
  89         ATA_NIEN                = (1 << 1),     /* disable-irq flag */
  90         ATA_LBA                 = (1 << 6),     /* LBA28 selector */
  91         ATA_DEV1                = (1 << 4),     /* Select Device 1 (slave) */
  92         ATA_DEVICE_OBS          = (1 << 7) | (1 << 5), /* obs bits in dev reg */
  93         ATA_DEVCTL_OBS          = (1 << 3),     /* obsolete bit in devctl reg */
  94         ATA_BUSY                = (1 << 7),     /* BSY status bit */
  95         ATA_DRDY                = (1 << 6),     /* device ready */
  96         ATA_DF                  = (1 << 5),     /* device fault */
  97         ATA_DRQ                 = (1 << 3),     /* data request i/o */
  98         ATA_ERR                 = (1 << 0),     /* have an error */
  99         ATA_SRST                = (1 << 2),     /* software reset */
 100         ATA_ABORTED             = (1 << 2),     /* command aborted */
 101
 102         /* ATA command block registers */
 103         ATA_REG_DATA            = 0x00,
 104         ATA_REG_ERR             = 0x01,
 105         ATA_REG_NSECT           = 0x02,
 106         ATA_REG_LBAL            = 0x03,
 107         ATA_REG_LBAM            = 0x04,
 108         ATA_REG_LBAH            = 0x05,
 109         ATA_REG_DEVICE          = 0x06,
 110         ATA_REG_STATUS          = 0x07,
 111
 112         ATA_REG_FEATURE         = ATA_REG_ERR, /* and their aliases */
 113         ATA_REG_CMD             = ATA_REG_STATUS,
 114         ATA_REG_BYTEL           = ATA_REG_LBAM,
 115         ATA_REG_BYTEH           = ATA_REG_LBAH,
 116         ATA_REG_DEVSEL          = ATA_REG_DEVICE,
 117         ATA_REG_IRQ             = ATA_REG_NSECT,
 118
 119         /* ATA device commands */
 120         ATA_CMD_CHK_POWER       = 0xE5, /* check power mode */
 121         ATA_CMD_STANDBY         = 0xE2, /* place in standby power mode */
 122         ATA_CMD_IDLE            = 0xE3, /* place in idle power mode */
 123         ATA_CMD_EDD             = 0x90, /* execute device diagnostic */
 124         ATA_CMD_FLUSH           = 0xE7,
 125         ATA_CMD_FLUSH_EXT       = 0xEA,
 126         ATA_CMD_ID_ATA          = 0xEC,
 127         ATA_CMD_ID_ATAPI        = 0xA1,
 128         ATA_CMD_READ            = 0xC8,
 129         ATA_CMD_READ_EXT        = 0x25,
 130         ATA_CMD_WRITE           = 0xCA,
 131         ATA_CMD_WRITE_EXT       = 0x35,
 132         ATA_CMD_WRITE_FUA_EXT   = 0x3D,
 133         ATA_CMD_PIO_READ        = 0x20,
 134         ATA_CMD_PIO_READ_EXT    = 0x24,
 135         ATA_CMD_PIO_WRITE       = 0x30,
 136         ATA_CMD_PIO_WRITE_EXT   = 0x34,
 137         ATA_CMD_READ_MULTI      = 0xC4,
 138         ATA_CMD_READ_MULTI_EXT  = 0x29,
 139         ATA_CMD_WRITE_MULTI     = 0xC5,
 140         ATA_CMD_WRITE_MULTI_EXT = 0x39,
 141         ATA_CMD_WRITE_MULTI_FUA_EXT = 0xCE,
 142         ATA_CMD_SET_FEATURES    = 0xEF,
 143         ATA_CMD_PACKET          = 0xA0,
 144         ATA_CMD_VERIFY          = 0x40,
 145         ATA_CMD_VERIFY_EXT      = 0x42,
 146         ATA_CMD_STANDBYNOW1     = 0xE0,
 147         ATA_CMD_IDLEIMMEDIATE   = 0xE1,
 148         ATA_CMD_INIT_DEV_PARAMS = 0x91,
 149
 150         /* SETFEATURES stuff */
 151         SETFEATURES_XFER        = 0x03,
 152         XFER_UDMA_7             = 0x47,
 153         XFER_UDMA_6             = 0x46,
 154         XFER_UDMA_5             = 0x45,
 155         XFER_UDMA_4             = 0x44,
 156         XFER_UDMA_3             = 0x43,
 157         XFER_UDMA_2             = 0x42,
 158         XFER_UDMA_1             = 0x41,
 159         XFER_UDMA_0             = 0x40,
 160         XFER_MW_DMA_2           = 0x22,
 161         XFER_MW_DMA_1           = 0x21,
 162         XFER_MW_DMA_0           = 0x20,
 163         XFER_SW_DMA_2           = 0x12,
 164         XFER_SW_DMA_1           = 0x11,
 165         XFER_SW_DMA_0           = 0x10,
 166         XFER_PIO_4              = 0x0C,
 167         XFER_PIO_3              = 0x0B,
 168         XFER_PIO_2              = 0x0A,
 169         XFER_PIO_1              = 0x09,
 170         XFER_PIO_0              = 0x08,
 171         XFER_PIO_SLOW           = 0x00,
 172
 173         /* ATAPI stuff */
 174         ATAPI_PKT_DMA           = (1 << 0),
 175         ATAPI_DMADIR            = (1 << 2),     /* ATAPI data dir:
 176                                                    0=to device, 1=to host */
 177         ATAPI_CDB_LEN           = 16,
 178
 179         /* cable types */
 180         ATA_CBL_NONE            = 0,
 181         ATA_CBL_PATA40          = 1,
 182         ATA_CBL_PATA80          = 2,
 183         ATA_CBL_PATA_UNK        = 3,
 184         ATA_CBL_SATA            = 4,
 185
 186         /* SATA Status and Control Registers */
 187         SCR_STATUS              = 0,
 188         SCR_ERROR               = 1,
 189         SCR_CONTROL             = 2,
 190         SCR_ACTIVE              = 3,
 191         SCR_NOTIFICATION        = 4,
 192
 193         /* struct ata_taskfile flags */
 194         ATA_TFLAG_LBA48         = (1 << 0), /* enable 48-bit LBA and "HOB" */
 195         ATA_TFLAG_ISADDR        = (1 << 1), /* enable r/w to nsect/lba regs */
 196         ATA_TFLAG_DEVICE        = (1 << 2), /* enable r/w to device reg */
 197         ATA_TFLAG_WRITE         = (1 << 3), /* data dir: host->dev==1 (write) */
 198         ATA_TFLAG_LBA           = (1 << 4), /* enable LBA */
 199         ATA_TFLAG_FUA           = (1 << 5), /* enable FUA */
 200 };
 201
 202 enum ata_tf_protocols {
 203         /* ATA taskfile protocols */
 204         ATA_PROT_UNKNOWN,       /* unknown/invalid */
 205         ATA_PROT_NODATA,        /* no data */
 206         ATA_PROT_PIO,           /* PIO single sector */
 207         ATA_PROT_PIO_MULT,      /* PIO multiple sector */
 208         ATA_PROT_DMA,           /* DMA */
 209         ATA_PROT_ATAPI,         /* packet command, PIO data xfer*/
 210         ATA_PROT_ATAPI_NODATA,  /* packet command, no data */
 211         ATA_PROT_ATAPI_DMA,     /* packet command with special DMA sauce */
 212 };
 213
 214 enum ata_ioctls {
 215         ATA_IOC_GET_IO32        = 0x309,
 216         ATA_IOC_SET_IO32        = 0x324,
 217 };
 218
 219 /* core structures */
 220
 221 struct ata_prd {
 222         u32                     addr;
 223         u32                     flags_len;
 224 };
 225
 226 struct ata_taskfile {
 227         unsigned long           flags;          /* ATA_TFLAG_xxx */
 228         u8                      protocol;       /* ATA_PROT_xxx */
 229
 230         u8                      ctl;            /* control reg */
 231
 232         u8                      hob_feature;    /* additional data */
 233         u8                      hob_nsect;      /* to support LBA48 */
 234         u8                      hob_lbal;
 235         u8                      hob_lbam;
 236         u8                      hob_lbah;
 237
 238         u8                      feature;
 239         u8                      nsect;
 240         u8                      lbal;
 241         u8                      lbam;
 242         u8                      lbah;
 243
 244         u8                      device;
 245
 246         u8                      command;        /* IO operation */
 247 };
 248
 249 #define ata_id_is_ata(id)       (((id)[0] & (1 << 15)) == 0)
 250 #define ata_id_is_sata(id)      ((id)[93] == 0)
 251 #define ata_id_rahead_enabled(id) ((id)[85] & (1 << 6))
 252 #define ata_id_wcache_enabled(id) ((id)[85] & (1 << 5))
 253 #define ata_id_has_fua(id)      ((id)[84] & (1 << 6))
 254 #define ata_id_has_flush(id)    ((id)[83] & (1 << 12))
 255 #define ata_id_has_flush_ext(id) ((id)[83] & (1 << 13))
 256 #define ata_id_has_lba48(id)    ((id)[83] & (1 << 10))
 257 #define ata_id_has_wcache(id)   ((id)[82] & (1 << 5))
 258 #define ata_id_has_pm(id)       ((id)[82] & (1 << 3))
 259 #define ata_id_has_lba(id)      ((id)[49] & (1 << 9))
 260 #define ata_id_has_dma(id)      ((id)[49] & (1 << 8))
 261 #define ata_id_removeable(id)   ((id)[0] & (1 << 7))
 262 #define ata_id_u32(id,n)        \
 263         (((u32) (id)[(n) + 1] << 16) | ((u32) (id)[(n)]))
 264 #define ata_id_u64(id,n)        \
 265         ( ((u64) (id)[(n) + 3] << 48) | \
 266           ((u64) (id)[(n) + 2] << 32) | \
 267           ((u64) (id)[(n) + 1] << 16) | \
 268           ((u64) (id)[(n) + 0]) )
 269
 270 static inline unsigned int ata_id_major_version(const u16 *id)
 271 {
 272         unsigned int mver;
 273
 274         for (mver = 14; mver >= 1; mver--)
 275                 if (id[ATA_ID_MAJOR_VER] & (1 << mver))
 276                         break;
 277         return mver;
 278 }
 279
 280 static inline int ata_id_current_chs_valid(const u16 *id)
 281 {
 282         /* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command
 283            has not been issued to the device then the values of
 284            id[54] to id[56] are vendor specific. */
 285         return (id[53] & 0x01) && /* Current translation valid */
 286                 id[54] &&  /* cylinders in current translation */
 287                 id[55] &&  /* heads in current translation */
 288                 id[55] <= 16 &&
 289                 id[56];    /* sectors in current translation */
 290 }
 291
 292 static inline int atapi_cdb_len(const u16 *dev_id)
 293 {
 294         u16 tmp = dev_id[0] & 0x3;
 295         switch (tmp) {
 296         case 0:         return 12;
 297         case 1:         return 16;
 298         default:        return -1;
 299         }
 300 }
 301
 302 static inline int is_atapi_taskfile(const struct ata_taskfile *tf)
 303 {
 304         return (tf->protocol == ATA_PROT_ATAPI) ||
 305                (tf->protocol == ATA_PROT_ATAPI_NODATA) ||
 306                (tf->protocol == ATA_PROT_ATAPI_DMA);
 307 }
 308
 309 static inline int ata_ok(u8 status)
 310 {
 311         return ((status & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | ATA_ERR))
 312                         == ATA_DRDY);
 313 }
 314
 315 static inline int lba_28_ok(u64 block, u32 n_block)
 316 {
 317         /* check the ending block number */
 318         return ((block + n_block - 1) < ((u64)1 << 28)) && (n_block <= 256);
 319 }
 320
 321 static inline int lba_48_ok(u64 block, u32 n_block)
 322 {
 323         /* check the ending block number */
 324         return ((block + n_block - 1) < ((u64)1 << 48)) && (n_block <= 65536);
 325 }
 326
 327 #endif /* __LINUX_ATA_H__ */