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[PATCH] libata CHS: calculate read/write commands and protocol on the fly (revise #6)

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- merge ata_prot_to_cmd() and ata_dev_set_protocol() as
       ata_rwcmd_protocol()
     - pave road for read/write multiple support
     - remove usage of pre-cached command and protocol values and call
       ata_rwcmd_protocol() instead

Signed-off-by: Albert Lee <albertcc@tw.ibm.com>

==============
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This commit is contained in:
Albert Lee 2005-10-12 15:06:27 +08:00 • committed by Jeff Garzik
commit 8cbd6df1f0
5 changed files with 50 additions and 79 deletions
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6
include/linux/libata.h
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@ -283,10 +283,8 @@ struct ata_device {
u8 xfer_mode;
unsigned int xfer_shift; /* ATA_SHIFT_xxx */
/* cache info about current transfer mode */
u8 xfer_protocol; /* taskfile xfer protocol */
u8 read_cmd; /* opcode to use on read */
u8 write_cmd; /* opcode to use on write */
unsigned int multi_count; /* sectors count for
READ/WRITE MULTIPLE */
/* for CHS addressing */
u16 cylinders; /* Number of cylinders */