include/ata.h

   1 /*
   2  * (C) Copyright 2000
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 /*
  25  * Most of the following information was derived from the document
  26  * "Information Technology - AT Attachment-3 Interface (ATA-3)"
  27  * which can be found at:
  28  * http://www.dt.wdc.com/ata/ata-3/ata3r5v.zip
  29  * ftp://poctok.iae.nsk.su/pub/asm/Documents/IDE/ATA3R5V.ZIP
  30  * ftp://ftp.fee.vutbr.cz/pub/doc/io/ata/ata-3/ata3r5v.zip
  31  */
  32
  33 #ifndef _ATA_H
  34 #define _ATA_H
  35
  36 /* Register addressing depends on the hardware design; for instance,
  37  * 8-bit (register) and 16-bit (data) accesses might use different
  38  * address spaces. This is implemented by the following definitions.
  39  */
  40 #ifndef CFG_ATA_STRIDE
  41 #define CFG_ATA_STRIDE  1
  42 #endif
  43
  44 #define ATA_IO_DATA(x)  (CFG_ATA_DATA_OFFSET+((x) * CFG_ATA_STRIDE))
  45 #define ATA_IO_REG(x)   (CFG_ATA_REG_OFFSET +((x) * CFG_ATA_STRIDE))
  46 #define ATA_IO_ALT(x)   (CFG_ATA_ALT_OFFSET +((x) * CFG_ATA_STRIDE))
  47
  48 /*
  49  * I/O Register Descriptions
  50  */
  51 #define ATA_DATA_REG    ATA_IO_DATA(0)
  52 #define ATA_ERROR_REG   ATA_IO_REG(1)
  53 #define ATA_SECT_CNT    ATA_IO_REG(2)
  54 #define ATA_SECT_NUM    ATA_IO_REG(3)
  55 #define ATA_CYL_LOW     ATA_IO_REG(4)
  56 #define ATA_CYL_HIGH    ATA_IO_REG(5)
  57 #define ATA_DEV_HD      ATA_IO_REG(6)
  58 #define ATA_COMMAND     ATA_IO_REG(7)
  59 #define ATA_DATA_EVEN   ATA_IO_REG(8)
  60 #define ATA_DATA_ODD    ATA_IO_REG(9)
  61 #define ATA_STATUS      ATA_COMMAND
  62 #define ATA_DEV_CTL     ATA_IO_ALT(6)
  63 #define ATA_LBA_LOW     ATA_SECT_NUM
  64 #define ATA_LBA_MID     ATA_CYL_LOW
  65 #define ATA_LBA_HIGH    ATA_CYL_HIGH
  66 #define ATA_LBA_SEL     ATA_DEV_CTL
  67
  68 /*
  69  * Status register bits
  70  */
  71 #define ATA_STAT_BUSY   0x80    /* Device Busy                  */
  72 #define ATA_STAT_READY  0x40    /* Device Ready                 */
  73 #define ATA_STAT_FAULT  0x20    /* Device Fault                 */
  74 #define ATA_STAT_SEEK   0x10    /* Device Seek Complete         */
  75 #define ATA_STAT_DRQ    0x08    /* Data Request (ready)         */
  76 #define ATA_STAT_CORR   0x04    /* Corrected Data Error         */
  77 #define ATA_STAT_INDEX  0x02    /* Vendor specific              */
  78 #define ATA_STAT_ERR    0x01    /* Error                        */
  79
  80 /*
  81  * Device / Head Register Bits
  82  */
  83 #define ATA_DEVICE(x)   ((x & 1)<<4)
  84 #define ATA_LBA         0xE0
  85
  86 /*
  87  * ATA Commands (only mandatory commands listed here)
  88  */
  89 #define ATA_CMD_READ    0x20    /* Read Sectors (with retries)  */
  90 #define ATA_CMD_READN   0x21    /* Read Sectors ( no  retries)  */
  91 #define ATA_CMD_WRITE   0x30    /* Write Sectores (with retries)*/
  92 #define ATA_CMD_WRITEN  0x31    /* Write Sectors  ( no  retries)*/
  93 #define ATA_CMD_VRFY    0x40    /* Read Verify  (with retries)  */
  94 #define ATA_CMD_VRFYN   0x41    /* Read verify  ( no  retries)  */
  95 #define ATA_CMD_SEEK    0x70    /* Seek                         */
  96 #define ATA_CMD_DIAG    0x90    /* Execute Device Diagnostic    */
  97 #define ATA_CMD_INIT    0x91    /* Initialize Device Parameters */
  98 #define ATA_CMD_RD_MULT 0xC4    /* Read Multiple                */
  99 #define ATA_CMD_WR_MULT 0xC5    /* Write Multiple               */
 100 #define ATA_CMD_SETMULT 0xC6    /* Set Multiple Mode            */
 101 #define ATA_CMD_RD_DMA  0xC8    /* Read DMA (with retries)      */
 102 #define ATA_CMD_RD_DMAN 0xC9    /* Read DMS ( no  retries)      */
 103 #define ATA_CMD_WR_DMA  0xCA    /* Write DMA (with retries)     */
 104 #define ATA_CMD_WR_DMAN 0xCB    /* Write DMA ( no  retires)     */
 105 #define ATA_CMD_IDENT   0xEC    /* Identify Device              */
 106 #define ATA_CMD_SETF    0xEF    /* Set Features                 */
 107 #define ATA_CMD_CHK_PWR 0xE5    /* Check Power Mode             */
 108
 109 /*
 110  * ATAPI Commands
 111  */
 112 #define ATAPI_CMD_IDENT 0xA1 /* Identify AT Atachment Packed Interface Device */
 113 #define ATAPI_CMD_PACKET 0xA0 /* Packed Command */
 114
 115
 116 #define ATAPI_CMD_INQUIRY 0x12
 117 #define ATAPI_CMD_REQ_SENSE 0x03
 118 #define ATAPI_CMD_READ_CAP 0x25
 119 #define ATAPI_CMD_START_STOP 0x1B
 120 #define ATAPI_CMD_READ_12 0xA8
 121
 122
 123 #define ATA_GET_ERR()   inb(ATA_STATUS)
 124 #define ATA_GET_STAT()  inb(ATA_STATUS)
 125 #define ATA_OK_STAT(stat,good,bad)      (((stat)&((good)|(bad)))==(good))
 126 #define ATA_BAD_R_STAT  (ATA_STAT_BUSY  | ATA_STAT_ERR)
 127 #define ATA_BAD_W_STAT  (ATA_BAD_R_STAT | ATA_STAT_FAULT)
 128 #define ATA_BAD_STAT    (ATA_BAD_R_STAT | ATA_STAT_DRQ)
 129 #define ATA_DRIVE_READY (ATA_READY_STAT | ATA_STAT_SEEK)
 130 #define ATA_DATA_READY  (ATA_STAT_DRQ)
 131
 132 #define ATA_BLOCKSIZE   512     /* bytes */
 133 #define ATA_BLOCKSHIFT  9       /* 2 ^ ATA_BLOCKSIZESHIFT = 512 */
 134 #define ATA_SECTORWORDS (512 / sizeof(unsigned long))
 135
 136 #ifndef ATA_RESET_TIME
 137 #define ATA_RESET_TIME  60      /* spec allows up to 31 seconds */
 138 #endif
 139
 140 /* ------------------------------------------------------------------------- */
 141
 142 /*
 143  * structure returned by ATA_CMD_IDENT, as per ANSI ATA2 rev.2f spec
 144  */
 145 typedef struct hd_driveid {
 146         unsigned short  config;         /* lots of obsolete bit flags */
 147         unsigned short  cyls;           /* "physical" cyls */
 148         unsigned short  reserved2;      /* reserved (word 2) */
 149         unsigned short  heads;          /* "physical" heads */
 150         unsigned short  track_bytes;    /* unformatted bytes per track */
 151         unsigned short  sector_bytes;   /* unformatted bytes per sector */
 152         unsigned short  sectors;        /* "physical" sectors per track */
 153         unsigned short  vendor0;        /* vendor unique */
 154         unsigned short  vendor1;        /* vendor unique */
 155         unsigned short  vendor2;        /* vendor unique */
 156         unsigned char   serial_no[20];  /* 0 = not_specified */
 157         unsigned short  buf_type;
 158         unsigned short  buf_size;       /* 512 byte increments; 0 = not_specified */
 159         unsigned short  ecc_bytes;      /* for r/w long cmds; 0 = not_specified */
 160         unsigned char   fw_rev[8];      /* 0 = not_specified */
 161         unsigned char   model[40];      /* 0 = not_specified */
 162         unsigned char   max_multsect;   /* 0=not_implemented */
 163         unsigned char   vendor3;        /* vendor unique */
 164         unsigned short  dword_io;       /* 0=not_implemented; 1=implemented */
 165         unsigned char   vendor4;        /* vendor unique */
 166         unsigned char   capability;     /* bits 0:DMA 1:LBA 2:IORDYsw 3:IORDYsup*/
 167         unsigned short  reserved50;     /* reserved (word 50) */
 168         unsigned char   vendor5;        /* vendor unique */
 169         unsigned char   tPIO;           /* 0=slow, 1=medium, 2=fast */
 170         unsigned char   vendor6;        /* vendor unique */
 171         unsigned char   tDMA;           /* 0=slow, 1=medium, 2=fast */
 172         unsigned short  field_valid;    /* bits 0:cur_ok 1:eide_ok */
 173         unsigned short  cur_cyls;       /* logical cylinders */
 174         unsigned short  cur_heads;      /* logical heads */
 175         unsigned short  cur_sectors;    /* logical sectors per track */
 176         unsigned short  cur_capacity0;  /* logical total sectors on drive */
 177         unsigned short  cur_capacity1;  /*  (2 words, misaligned int)     */
 178         unsigned char   multsect;       /* current multiple sector count */
 179         unsigned char   multsect_valid; /* when (bit0==1) multsect is ok */
 180         unsigned int    lba_capacity;   /* total number of sectors */
 181         unsigned short  dma_1word;      /* single-word dma info */
 182         unsigned short  dma_mword;      /* multiple-word dma info */
 183         unsigned short  eide_pio_modes; /* bits 0:mode3 1:mode4 */
 184         unsigned short  eide_dma_min;   /* min mword dma cycle time (ns) */
 185         unsigned short  eide_dma_time;  /* recommended mword dma cycle time (ns) */
 186         unsigned short  eide_pio;       /* min cycle time (ns), no IORDY  */
 187         unsigned short  eide_pio_iordy; /* min cycle time (ns), with IORDY */
 188         unsigned short  words69_70[2];  /* reserved words 69-70 */
 189         unsigned short  words71_74[4];  /* reserved words 71-74 */
 190         unsigned short  queue_depth;    /*  */
 191         unsigned short  words76_79[4];  /* reserved words 76-79 */
 192         unsigned short  major_rev_num;  /*  */
 193         unsigned short  minor_rev_num;  /*  */
 194         unsigned short  command_set_1;  /* bits 0:Smart 1:Security 2:Removable 3:PM */
 195         unsigned short  command_set_2;  /* bits 14:Smart Enabled 13:0 zero */
 196         unsigned short  cfsse;          /* command set-feature supported extensions */
 197         unsigned short  cfs_enable_1;   /* command set-feature enabled */
 198         unsigned short  cfs_enable_2;   /* command set-feature enabled */
 199         unsigned short  csf_default;    /* command set-feature default */
 200         unsigned short  dma_ultra;      /*  */
 201         unsigned short  word89;         /* reserved (word 89) */
 202         unsigned short  word90;         /* reserved (word 90) */
 203         unsigned short  CurAPMvalues;   /* current APM values */
 204         unsigned short  word92;         /* reserved (word 92) */
 205         unsigned short  hw_config;      /* hardware config */
 206         unsigned short  words94_125[32];/* reserved words 94-125 */
 207         unsigned short  last_lun;       /* reserved (word 126) */
 208         unsigned short  word127;        /* reserved (word 127) */
 209         unsigned short  dlf;            /* device lock function
 210                                          * 15:9 reserved
 211                                          * 8    security level 1:max 0:high
 212                                          * 7:6  reserved
 213                                          * 5    enhanced erase
 214                                          * 4    expire
 215                                          * 3    frozen
 216                                          * 2    locked
 217                                          * 1    en/disabled
 218                                          * 0    capability
 219                                          */
 220         unsigned short  csfo;           /* current set features options
 221                                          * 15:4 reserved
 222                                          * 3    auto reassign
 223                                          * 2    reverting
 224                                          * 1    read-look-ahead
 225                                          * 0    write cache
 226                                          */
 227         unsigned short  words130_155[26];/* reserved vendor words 130-155 */
 228         unsigned short  word156;
 229         unsigned short  words157_159[3];/* reserved vendor words 157-159 */
 230         unsigned short  words160_255[95];/* reserved words 160-255 */
 231 } hd_driveid_t;
 232
 233
 234 /*
 235  * PIO Mode Configuration
 236  *
 237  * See ATA-3 (AT Attachment-3 Interface) documentation, Figure 14 / Table 21
 238  */
 239
 240 typedef struct {
 241         unsigned int    t_setup;        /* Setup  Time in [ns] or clocks        */
 242         unsigned int    t_length;       /* Length Time in [ns] or clocks        */
 243         unsigned int    t_hold;         /* Hold   Time in [ns] or clocks        */
 244 }
 245 pio_config_t;
 246
 247 #define IDE_MAX_PIO_MODE        4       /* max suppurted PIO mode               */
 248
 249 /* ------------------------------------------------------------------------- */
 250
 251 #endif /* _ATA_H */