diff options
Diffstat (limited to 'drivers/ata/pata_via.c')
| -rw-r--r-- | drivers/ata/pata_via.c | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/drivers/ata/pata_via.c b/drivers/ata/pata_via.c index 708ed144ede..8fdb2ce7321 100644 --- a/drivers/ata/pata_via.c +++ b/drivers/ata/pata_via.c @@ -98,7 +98,8 @@ static const struct via_isa_bridge { u8 rev_max; u16 flags; } via_isa_bridges[] = { - { "vx800", PCI_DEVICE_ID_VIA_VX800, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST }, + { "vx800", PCI_DEVICE_ID_VIA_VX800, 0x00, 0x2f, VIA_UDMA_133 | + VIA_BAD_AST | VIA_SATA_PATA }, { "vt8237s", PCI_DEVICE_ID_VIA_8237S, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST }, { "vt8251", PCI_DEVICE_ID_VIA_8251, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST }, { "cx700", PCI_DEVICE_ID_VIA_CX700, 0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST | VIA_SATA_PATA }, @@ -322,6 +323,29 @@ static void via_set_dmamode(struct ata_port *ap, struct ata_device *adev) via_do_set_mode(ap, adev, adev->dma_mode, tclock[mode], set_ast, udma[mode]); } +/** + * 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 + */ +static void via_tf_load(struct ata_port *ap, const struct ata_taskfile *tf) +{ + struct ata_taskfile tmp_tf; + + if (ap->ctl != ap->last_ctl && !(tf->flags & ATA_TFLAG_DEVICE)) { + tmp_tf = *tf; + tmp_tf.flags |= ATA_TFLAG_DEVICE; + tf = &tmp_tf; + } + ata_sff_tf_load(ap, tf); +} + static struct scsi_host_template via_sht = { ATA_BMDMA_SHT(DRV_NAME), }; @@ -332,6 +356,7 @@ 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_tf_load, }; static struct ata_port_operations via_port_ops_noirq = { |