drivers/ide.h

   1 #ifndef IDE_H
   2 #define IDE_H
   3
   4 #include "hdreg.h"
   5
   6 /*
   7  * legacy ide ports
   8  */
   9 #define IDEREG_DATA     0x00
  10 #define IDEREG_ERROR    0x01
  11 #define IDEREG_FEATURE  IDEREG_ERROR
  12 #define IDEREG_NSECTOR  0x02
  13 #define IDEREG_SECTOR   0x03
  14 #define IDEREG_LCYL     0x04
  15 #define IDEREG_HCYL     0x05
  16 #define IDEREG_CURRENT  0x06
  17 #define IDEREG_STATUS   0x07
  18 #define IDEREG_COMMAND  IDEREG_STATUS
  19 #define IDEREG_CONTROL  0x08
  20 #define IDEREG_ASTATUS  IDEREG_CONTROL
  21
  22 /*
  23  * device control bits
  24  */
  25 #define IDECON_NIEN     0x02
  26 #define IDECON_SRST     0x04
  27
  28 /*
  29  * device head bits
  30  */
  31 #define IDEHEAD_LBA     0x40
  32 #define IDEHEAD_DEV0    0x00
  33 #define IDEHEAD_DEV1    0x10
  34
  35 /*
  36  * status bytes
  37  */
  38 #define ERR_STAT        0x01
  39 #define DRQ_STAT        0x08
  40 #define SEEK_STAT       0x10
  41 #define WRERR_STAT      0x20
  42 #define READY_STAT      0x40
  43 #define BUSY_STAT       0x80
  44
  45 #define IREASON_CD      0x01
  46 #define IREASON_IO      0x02
  47
  48 /*
  49  * ATA opcodes
  50  */
  51 #define WIN_READ                0x20
  52 #define WIN_READ_EXT            0x24
  53 #define WIN_IDENTIFY            0xEC
  54 #define WIN_PACKET              0xA0
  55 #define WIN_IDENTIFY_PACKET     0xA1
  56
  57 /*
  58  * ATAPI opcodes
  59  */
  60 #define ATAPI_TUR               0x00
  61 #define ATAPI_READ_10           0x28
  62 #define ATAPI_REQ_SENSE         0x03
  63 #define ATAPI_START_STOP_UNIT   0x1b
  64 #define ATAPI_READ_CAPACITY     0x25
  65
  66 /*
  67  * atapi sense keys
  68  */
  69 #define ATAPI_SENSE_NOT_READY   0x02
  70
  71 /*
  72  * supported device types
  73  */
  74 enum {
  75         ide_type_unknown,
  76         ide_type_ata,
  77         ide_type_atapi,
  78 };
  79
  80 enum {
  81         ide_media_floppy = 0x00,
  82         ide_media_cdrom = 0x05,
  83         ide_media_optical = 0x07,
  84         ide_media_disk = 0x20,
  85 };
  86
  87 /*
  88  * drive addressing
  89  */
  90 enum {
  91         ide_chs = 1,
  92         ide_lba28,
  93         ide_lba48,
  94 };
  95
  96 /*
  97  * simple ata command that works for everything (except 48-bit lba commands)
  98  */
  99 struct ata_command {
 100         unsigned char *buffer;
 101         unsigned int buflen;
 102
 103         /*
 104          * data register
 105          */
 106         unsigned char data;
 107         unsigned char feature;
 108         unsigned char nsector;
 109         unsigned char sector;
 110         unsigned char lcyl;
 111         unsigned char hcyl;
 112         unsigned char device_head;
 113         unsigned char command;
 114         unsigned char control;
 115
 116         /*
 117          * or tasklet, just for lba48 for now (above could be scrapped)
 118          */
 119         unsigned char task[10];
 120
 121         /*
 122          * output
 123          */
 124         unsigned char stat;
 125         unsigned int bytes;
 126 };
 127
 128 struct atapi_command {
 129         unsigned char cdb[12];
 130         unsigned char *buffer;
 131         unsigned int buflen;
 132         unsigned char data_direction;
 133
 134         unsigned char stat;
 135         unsigned char sense_valid;
 136         struct request_sense sense;
 137         unsigned char old_cdb;
 138 };
 139
 140 struct ide_channel;
 141
 142 struct ide_drive {
 143         char            unit;           /* 0: master, 1: slave */
 144         char            present;        /* there or not */
 145         char            type;           /* ata or atapi */
 146         char            media;          /* disk, cdrom, etc */
 147         char            addressing;     /* chs/lba28/lba48 */
 148
 149         char            model[41];      /* name */
 150         int             nr;
 151
 152         unsigned long   sectors;
 153
 154         unsigned int    max_sectors;
 155
 156         /*
 157          * for legacy chs crap
 158          */
 159         unsigned int    cyl;
 160         unsigned int    head;
 161         unsigned int    sect;
 162
 163         unsigned int bs;                /* block size */
 164
 165         struct ide_channel *channel;
 166 };
 167
 168 struct ide_channel {
 169
 170         char name[32];
 171         struct ide_channel *next;
 172
 173         /*
 174          * either mmio or io_regs is set to indicate mmio or not
 175          */
 176         unsigned long mmio;
 177         int io_regs[10];
 178
 179         /*
 180          * can be set to a mmio hook, default it legacy outb/inb
 181          */
 182         void (*obide_outb)(struct ide_channel *chan,
 183                            unsigned char addr, unsigned int port);
 184         unsigned char (*obide_inb)(struct ide_channel *chan,
 185                                    unsigned int port);
 186         void (*obide_insw)(struct ide_channel *chan,
 187                            unsigned int port, unsigned char *addr,
 188                            unsigned int count);
 189         void (*obide_outsw)(struct ide_channel *chan,
 190                             unsigned int port, unsigned char *addr,
 191                             unsigned int count);
 192
 193         struct ide_drive drives[2];
 194         char selected;
 195         char present;
 196
 197         /*
 198          * only one can be busy per channel
 199          */
 200         struct ata_command ata_cmd;
 201         struct atapi_command atapi_cmd;
 202
 203 };
 204
 205 enum {
 206         atapi_ddir_none,
 207         atapi_ddir_read,
 208         atapi_ddir_write,
 209 };
 210
 211 static int ob_ide_atapi_request_sense(struct ide_drive *drive);
 212
 213 #endif