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| author | Albert Lee <albertcc@tw.ibm.com> | 2005-05-12 15:29:42 -0400 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@pobox.com> | 2005-05-12 15:29:42 -0400 |
| commit | 8bf62ecee58360749c5f0e68bc97d5e02a6816b1 (patch) | |
| tree | a3da6e695fc5a71ac7f3246707380a9ac22f6402 /include/linux/ata.h | |
| parent | 88d7bd8cb9eb8d64bf7997600b0d64f7834047c5 (diff) | |
| download | lwn-8bf62ecee58360749c5f0e68bc97d5e02a6816b1.tar.gz lwn-8bf62ecee58360749c5f0e68bc97d5e02a6816b1.zip | |
[libata] C/H/S support, for older devices
Diffstat (limited to 'include/linux/ata.h')
| -rw-r--r-- | include/linux/ata.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/ata.h b/include/linux/ata.h index f178894edd04..d8981402cd5b 100644 --- a/include/linux/ata.h +++ b/include/linux/ata.h @@ -125,6 +125,7 @@ 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, @@ -174,6 +175,7 @@ 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 { @@ -242,6 +244,18 @@ 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; |