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authorDan McGee <dpmcgee@gmail.com>2011-09-07 11:23:20 -0500
committerJeff Garzik <jgarzik@redhat.com>2011-10-08 00:07:16 -0400
commit14004f044bef275ac911375a8157e6773da4260a (patch)
tree0232dd54b5f57a0be7e4f10298bb63f5fc4867bb /drivers/ata
parentf30f9a5e7bc130c727712342dd064ae8d188b170 (diff)
downloadlinux-14004f044bef275ac911375a8157e6773da4260a.tar.bz2
pata_sis: enable MWDMA for UDMA 133 chipset
This ports the timing values over from the old IDE driver into the new PATA-based one. The comment was lying when it stated the old driver was not MWDMA capable. Boot tested on actual hardware using 'libata.force=mwdma2'. Signed-off-by: Dan McGee <dpmcgee@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/ata')
-rw-r--r--drivers/ata/pata_sis.c25
1 files changed, 17 insertions, 8 deletions
diff --git a/drivers/ata/pata_sis.c b/drivers/ata/pata_sis.c
index fb4e90f6d749..a42668bd48f8 100644
--- a/drivers/ata/pata_sis.c
+++ b/drivers/ata/pata_sis.c
@@ -485,21 +485,30 @@ static void sis_133_set_dmamode (struct ata_port *ap, struct ata_device *adev)
int port;
u32 t1;
- /* bits 4- cycle time 8 - cvs time */
- static const u32 timing_u100[] = { 0x6B0, 0x470, 0x350, 0x140, 0x120, 0x110, 0x000 };
- static const u32 timing_u133[] = { 0x9F0, 0x6A0, 0x470, 0x250, 0x230, 0x220, 0x210 };
-
port = sis_port_base(adev);
pci_read_config_dword(pdev, port, &t1);
if (adev->dma_mode < XFER_UDMA_0) {
+ /* Recovery << 24 | Act << 16 | Ini << 12, like PIO modes */
+ static const u32 timing_u100[] = { 0x19154000, 0x06072000, 0x04062000 };
+ static const u32 timing_u133[] = { 0x221C6000, 0x0C0A3000, 0x05093000 };
+ int speed = adev->dma_mode - XFER_MW_DMA_0;
+
+ t1 &= 0xC0C00FFF;
+ /* disable UDMA */
t1 &= ~0x00000004;
- /* FIXME: need data sheet to add MWDMA here. Also lacking on
- ide/pci driver */
+ if (t1 & 0x08)
+ t1 |= timing_u133[speed];
+ else
+ t1 |= timing_u100[speed];
} else {
+ /* bits 4- cycle time 8 - cvs time */
+ static const u32 timing_u100[] = { 0x6B0, 0x470, 0x350, 0x140, 0x120, 0x110, 0x000 };
+ static const u32 timing_u133[] = { 0x9F0, 0x6A0, 0x470, 0x250, 0x230, 0x220, 0x210 };
int speed = adev->dma_mode - XFER_UDMA_0;
- /* if & 8 no UDMA133 - need info for ... */
+
t1 &= ~0x00000FF0;
+ /* enable UDMA */
t1 |= 0x00000004;
if (t1 & 0x08)
t1 |= timing_u133[speed];
@@ -620,7 +629,7 @@ static const struct ata_port_info sis_info100_early = {
static const struct ata_port_info sis_info133 = {
.flags = ATA_FLAG_SLAVE_POSS,
.pio_mask = ATA_PIO4,
- /* No MWDMA */
+ .mwdma_mask = ATA_MWDMA2,
.udma_mask = ATA_UDMA6,
.port_ops = &sis_133_ops,
};