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pata_via: clean up recent tf_load changes 

Commit bfce5e0179 implemented custom
tf_load for pata_via.  This patch cleans it up a bit.

* Instead of duplicating whole body, copy tf and set ATA_TFLAG_DEVICE
  when necessary.

* Rename via_ata_tf_load() to via_tf_load().

* No need to set .tf_load in via_port_ops_noirq as it inherits from
  via_port_ops.

* Clean up indentation.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Joseph Chan <JosephChan@via.com.tw>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
hifive-unleashed-5.1
Tejun Heo 2008-07-31 18:02:35 +09:00 committed by Jeff Garzik
parent d127ea7b86
commit ff04715bd5
1 changed files with 11 additions and 48 deletions
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59
drivers/ata/pata_via.c
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@ -324,62 +324,26 @@ static void via_set_dmamode(struct ata_port *ap, struct ata_device *adev)
}
/**
* via_ata_sff_tf_load - send taskfile registers to host controller
* via_tf_load - send taskfile registers to host controller
* @ap: Port to which output is sent
* @tf: ATA taskfile register set
*
* Outputs ATA taskfile to standard ATA host controller.
*
* Note: This is to fix the internal bug of via chipsets, which
* will reset the device register after changing the IEN bit on
* ctl register
* will reset the device register after changing the IEN bit on
* ctl register
*/
static void via_ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf)
static void via_tf_load(struct ata_port *ap, const struct ata_taskfile *tf)
{
struct ata_ioports *ioaddr = &ap->ioaddr;
unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
struct ata_taskfile tmp_tf;
if (tf->ctl != ap->last_ctl) {
iowrite8(tf->ctl, ioaddr->ctl_addr);
iowrite8(tf->device, ioaddr->device_addr);
ap->last_ctl = tf->ctl;
ata_wait_idle(ap);
if (ap->ctl != ap->last_ctl && !(tf->flags & ATA_TFLAG_DEVICE)) {
tmp_tf = *tf;
tmp_tf.flags |= ATA_TFLAG_DEVICE;
tf = &tmp_tf;
}
if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) {
iowrite8(tf->hob_feature, ioaddr->feature_addr);
iowrite8(tf->hob_nsect, ioaddr->nsect_addr);
iowrite8(tf->hob_lbal, ioaddr->lbal_addr);
iowrite8(tf->hob_lbam, ioaddr->lbam_addr);
iowrite8(tf->hob_lbah, ioaddr->lbah_addr);
VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n",
tf->hob_feature,
tf->hob_nsect,
tf->hob_lbal,
tf->hob_lbam,
tf->hob_lbah);
}
if (is_addr) {
iowrite8(tf->feature, ioaddr->feature_addr);
iowrite8(tf->nsect, ioaddr->nsect_addr);
iowrite8(tf->lbal, ioaddr->lbal_addr);
iowrite8(tf->lbam, ioaddr->lbam_addr);
iowrite8(tf->lbah, ioaddr->lbah_addr);
VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
tf->feature,
tf->nsect,
tf->lbal,
tf->lbam,
tf->lbah);
}
if (tf->flags & ATA_TFLAG_DEVICE) {
iowrite8(tf->device, ioaddr->device_addr);
VPRINTK("device 0x%X\n", tf->device);
}
ata_wait_idle(ap);
ata_sff_tf_load(ap, tf);
}
static struct scsi_host_template via_sht = {
@ -392,13 +356,12 @@ static struct ata_port_operations via_port_ops = {
.set_piomode = via_set_piomode,
.set_dmamode = via_set_dmamode,
.prereset = via_pre_reset,
.sff_tf_load = via_ata_tf_load,
.sff_tf_load = via_tf_load,
};
static struct ata_port_operations via_port_ops_noirq = {
.inherits = &via_port_ops,
.sff_data_xfer = ata_sff_data_xfer_noirq,
.sff_tf_load = via_ata_tf_load,
};
/**