diff options
| author | Dan McGee <dpmcgee@gmail.com> | 2011-09-07 11:23:20 -0500 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2011-10-08 00:07:16 -0400 |
| commit | 14004f044bef275ac911375a8157e6773da4260a (patch) | |
| tree | 0232dd54b5f57a0be7e4f10298bb63f5fc4867bb /drivers | |
| parent | f30f9a5e7bc130c727712342dd064ae8d188b170 (diff) | |
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')
| -rw-r--r-- | drivers/ata/pata_sis.c | 25 |
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, }; |