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/spare/repo/libata-dev branch 'chs-support'

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This commit is contained in:
Jeff Garzik
2005-09-28 12:11:15 -04:00
parent 14be71f4c5 98ed72deeb
commit 64f09c98d7
4 changed files with 320 additions and 143 deletions
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14
include/linux/ata.h
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@@ -132,6 +132,7 @@ enum {
ATA_CMD_PACKET = 0xA0,
ATA_CMD_VERIFY = 0x40,
ATA_CMD_VERIFY_EXT = 0x42,
ATA_CMD_INIT_DEV_PARAMS = 0x91,
/* SETFEATURES stuff */
SETFEATURES_XFER = 0x03,
@@ -181,6 +182,7 @@ enum {
ATA_TFLAG_ISADDR = (1 << 1), /* enable r/w to nsect/lba regs */
ATA_TFLAG_DEVICE = (1 << 2), /* enable r/w to device reg */
ATA_TFLAG_WRITE = (1 << 3), /* data dir: host->dev==1 (write) */
ATA_TFLAG_LBA = (1 << 4), /* enable LBA */
};
enum ata_tf_protocols {
@@ -250,6 +252,18 @@ struct ata_taskfile {
((u64) (id)[(n) + 1] << 16) | \
((u64) (id)[(n) + 0]) )
static inline int ata_id_current_chs_valid(u16 *id)
{
/* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command
has not been issued to the device then the values of
id[54] to id[56] are vendor specific. */
return (id[53] & 0x01) && /* Current translation valid */
id[54] && /* cylinders in current translation */
id[55] && /* heads in current translation */
id[55] <= 16 &&
id[56]; /* sectors in current translation */
}
static inline int atapi_cdb_len(u16 *dev_id)
{
u16 tmp = dev_id[0] & 0x3;

6
include/linux/libata.h
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@@ -97,6 +97,7 @@ enum {
ATA_DFLAG_LBA48 = (1 << 0), /* device supports LBA48 */
ATA_DFLAG_PIO = (1 << 1), /* device currently in PIO mode */
ATA_DFLAG_LOCK_SECTORS = (1 << 2), /* don't adjust max_sectors */
ATA_DFLAG_LBA = (1 << 3), /* device supports LBA */
ATA_DEV_UNKNOWN = 0, /* unknown device */
ATA_DEV_ATA = 1, /* ATA device */
@@ -282,6 +283,11 @@ struct ata_device {
u8 xfer_protocol; /* taskfile xfer protocol */
u8 read_cmd; /* opcode to use on read */
u8 write_cmd; /* opcode to use on write */
/* for CHS addressing */
u16 cylinders; /* Number of cylinders */
u16 heads; /* Number of heads */
u16 sectors; /* Number of sectors per track */
};
struct ata_port {