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| author | Akira Iguchi <akira2.iguchi@toshiba.co.jp> | 2007-07-17 05:10:17 +0200 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2007-07-20 13:16:24 +0200 |
| commit | dcd0344775c1c0bf8ff3b9541863beea5088a7c9 (patch) | |
| tree | d9d00cc6106aa9818c1349c1bb4ccd5660414a61 /drivers/ata | |
| parent | ahci.c: fix CONFIG_PM=n compilation (diff) | |
| download | linux-dcd0344775c1c0bf8ff3b9541863beea5088a7c9.tar.xz linux-dcd0344775c1c0bf8ff3b9541863beea5088a7c9.zip | |
pata_scc.c: small fixes (Workaround for errata A308)
This patch fixes some issues of the previous patch:
- Use mode_filter() hook to limit ATAPI UDMA mode
- "data loss" warning message
- handling of udma_mask
Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp>
Signed-off-by: Akira Iguchi <akira2.iguchi@toshiba.co.jp>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/ata')
| -rw-r--r-- | drivers/ata/pata_scc.c | 27 |
1 files changed, 16 insertions, 11 deletions
diff --git a/drivers/ata/pata_scc.c b/drivers/ata/pata_scc.c index c55667e0eb65..c0ffbed3e75d 100644 --- a/drivers/ata/pata_scc.c +++ b/drivers/ata/pata_scc.c @@ -238,12 +238,6 @@ static void scc_set_dmamode (struct ata_port *ap, struct ata_device *adev) else offset = 0; /* 100MHz */ - /* errata A308 workaround: limit ATAPI UDMA mode to UDMA4 */ - if (adev->class == ATA_DEV_ATAPI && speed > XFER_UDMA_4) { - printk(KERN_INFO "%s: limit ATAPI UDMA to UDMA4\n", DRV_NAME); - speed = XFER_UDMA_4; - } - if (speed >= XFER_UDMA_0) idx = speed - XFER_UDMA_0; else @@ -264,6 +258,17 @@ static void scc_set_dmamode (struct ata_port *ap, struct ata_device *adev) JCTSStbl[offset][idx] << 16 | JCENVTtbl[offset][idx]); } +unsigned long scc_mode_filter(struct ata_device *adev, unsigned long mask) +{ + /* errata A308 workaround: limit ATAPI UDMA mode to UDMA4 */ + if (adev->class == ATA_DEV_ATAPI && + (mask & (0xE0 << ATA_SHIFT_UDMA))) { + printk(KERN_INFO "%s: limit ATAPI UDMA to UDMA4\n", DRV_NAME); + mask &= ~(0xE0 << ATA_SHIFT_UDMA); + } + return ata_pci_default_filter(adev, mask); +} + /** * scc_tf_load - send taskfile registers to host controller * @ap: Port to which output is sent @@ -741,7 +746,7 @@ static u8 scc_bmdma_status (struct ata_port *ap) return host_stat; /* errata A252,A308 workaround: Step4 */ - if (ata_altstatus(ap) & ATA_ERR && int_status & INTSTS_INTRQ) + if ((ata_altstatus(ap) & ATA_ERR) && (int_status & INTSTS_INTRQ)) return (host_stat | ATA_DMA_INTR); /* errata A308 workaround Step5 */ @@ -752,11 +757,11 @@ static u8 scc_bmdma_status (struct ata_port *ap) if ((qc->tf.protocol == ATA_PROT_DMA && qc->dev->xfer_mode > XFER_UDMA_4)) { if (!(int_status & INTSTS_ACTEINT)) { - printk(KERN_WARNING "ata%u: data lost occurred. (ACTEINT==0, retry:%d)\n", - ap->print_id, retry); + printk(KERN_WARNING "ata%u: operation failed (transfer data loss)\n", + ap->print_id); host_stat |= ATA_DMA_ERR; if (retry++) - ap->udma_mask >>= 1; + ap->udma_mask &= ~(1 << qc->dev->xfer_mode); } else retry = 0; } @@ -1016,7 +1021,7 @@ static const struct ata_port_operations scc_pata_ops = { .port_disable = ata_port_disable, .set_piomode = scc_set_piomode, .set_dmamode = scc_set_dmamode, - .mode_filter = ata_pci_default_filter, + .mode_filter = scc_mode_filter, .tf_load = scc_tf_load, .tf_read = scc_tf_read, |