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path: root/drivers/ata/pata_amd.c
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Diffstat (limited to 'drivers/ata/pata_amd.c')
-rw-r--r--drivers/ata/pata_amd.c128
1 files changed, 93 insertions, 35 deletions
diff --git a/drivers/ata/pata_amd.c b/drivers/ata/pata_amd.c
index 3cc27b51465..761a66608d7 100644
--- a/drivers/ata/pata_amd.c
+++ b/drivers/ata/pata_amd.c
@@ -220,6 +220,62 @@ static void amd133_set_dmamode(struct ata_port *ap, struct ata_device *adev)
timing_setup(ap, adev, 0x40, adev->dma_mode, 4);
}
+/* Both host-side and drive-side detection results are worthless on NV
+ * PATAs. Ignore them and just follow what BIOS configured. Both the
+ * current configuration in PCI config reg and ACPI GTM result are
+ * cached during driver attach and are consulted to select transfer
+ * mode.
+ */
+static unsigned long nv_mode_filter(struct ata_device *dev,
+ unsigned long xfer_mask)
+{
+ static const unsigned int udma_mask_map[] =
+ { ATA_UDMA2, ATA_UDMA1, ATA_UDMA0, 0,
+ ATA_UDMA3, ATA_UDMA4, ATA_UDMA5, ATA_UDMA6 };
+ struct ata_port *ap = dev->link->ap;
+ char acpi_str[32] = "";
+ u32 saved_udma, udma;
+ const struct ata_acpi_gtm *gtm;
+ unsigned long bios_limit = 0, acpi_limit = 0, limit;
+
+ /* find out what BIOS configured */
+ udma = saved_udma = (unsigned long)ap->host->private_data;
+
+ if (ap->port_no == 0)
+ udma >>= 16;
+ if (dev->devno == 0)
+ udma >>= 8;
+
+ if ((udma & 0xc0) == 0xc0)
+ bios_limit = ata_pack_xfermask(0, 0, udma_mask_map[udma & 0x7]);
+
+ /* consult ACPI GTM too */
+ gtm = ata_acpi_init_gtm(ap);
+ if (gtm) {
+ acpi_limit = ata_acpi_gtm_xfermask(dev, gtm);
+
+ snprintf(acpi_str, sizeof(acpi_str), " (%u:%u:0x%x)",
+ gtm->drive[0].dma, gtm->drive[1].dma, gtm->flags);
+ }
+
+ /* be optimistic, EH can take care of things if something goes wrong */
+ limit = bios_limit | acpi_limit;
+
+ /* If PIO or DMA isn't configured at all, don't limit. Let EH
+ * handle it.
+ */
+ if (!(limit & ATA_MASK_PIO))
+ limit |= ATA_MASK_PIO;
+ if (!(limit & (ATA_MASK_MWDMA | ATA_MASK_UDMA)))
+ limit |= ATA_MASK_MWDMA | ATA_MASK_UDMA;
+
+ ata_port_printk(ap, KERN_DEBUG, "nv_mode_filter: 0x%lx&0x%lx->0x%lx, "
+ "BIOS=0x%lx (0x%x) ACPI=0x%lx%s\n",
+ xfer_mask, limit, xfer_mask & limit, bios_limit,
+ saved_udma, acpi_limit, acpi_str);
+
+ return xfer_mask & limit;
+}
/**
* nv_probe_init - cable detection
@@ -252,31 +308,6 @@ static void nv_error_handler(struct ata_port *ap)
ata_std_postreset);
}
-static int nv_cable_detect(struct ata_port *ap)
-{
- static const u8 bitmask[2] = {0x03, 0x0C};
- struct pci_dev *pdev = to_pci_dev(ap->host->dev);
- u8 ata66;
- u16 udma;
- int cbl;
-
- pci_read_config_byte(pdev, 0x52, &ata66);
- if (ata66 & bitmask[ap->port_no])
- cbl = ATA_CBL_PATA80;
- else
- cbl = ATA_CBL_PATA40;
-
- /* We now have to double check because the Nvidia boxes BIOS
- doesn't always set the cable bits but does set mode bits */
- pci_read_config_word(pdev, 0x62 - 2 * ap->port_no, &udma);
- if ((udma & 0xC4) == 0xC4 || (udma & 0xC400) == 0xC400)
- cbl = ATA_CBL_PATA80;
- /* And a triple check across suspend/resume with ACPI around */
- if (ata_acpi_cbl_80wire(ap))
- cbl = ATA_CBL_PATA80;
- return cbl;
-}
-
/**
* nv100_set_piomode - set initial PIO mode data
* @ap: ATA interface
@@ -314,6 +345,14 @@ static void nv133_set_dmamode(struct ata_port *ap, struct ata_device *adev)
timing_setup(ap, adev, 0x50, adev->dma_mode, 4);
}
+static void nv_host_stop(struct ata_host *host)
+{
+ u32 udma = (unsigned long)host->private_data;
+
+ /* restore PCI config register 0x60 */
+ pci_write_config_dword(to_pci_dev(host->dev), 0x60, udma);
+}
+
static struct scsi_host_template amd_sht = {
.module = THIS_MODULE,
.name = DRV_NAME,
@@ -478,7 +517,8 @@ static struct ata_port_operations nv100_port_ops = {
.thaw = ata_bmdma_thaw,
.error_handler = nv_error_handler,
.post_internal_cmd = ata_bmdma_post_internal_cmd,
- .cable_detect = nv_cable_detect,
+ .cable_detect = ata_cable_ignore,
+ .mode_filter = nv_mode_filter,
.bmdma_setup = ata_bmdma_setup,
.bmdma_start = ata_bmdma_start,
@@ -495,6 +535,7 @@ static struct ata_port_operations nv100_port_ops = {
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,
+ .host_stop = nv_host_stop,
};
static struct ata_port_operations nv133_port_ops = {
@@ -511,7 +552,8 @@ static struct ata_port_operations nv133_port_ops = {
.thaw = ata_bmdma_thaw,
.error_handler = nv_error_handler,
.post_internal_cmd = ata_bmdma_post_internal_cmd,
- .cable_detect = nv_cable_detect,
+ .cable_detect = ata_cable_ignore,
+ .mode_filter = nv_mode_filter,
.bmdma_setup = ata_bmdma_setup,
.bmdma_start = ata_bmdma_start,
@@ -528,6 +570,7 @@ static struct ata_port_operations nv133_port_ops = {
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,
+ .host_stop = nv_host_stop,
};
static int amd_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
@@ -614,7 +657,8 @@ static int amd_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
.port_ops = &amd100_port_ops
}
};
- const struct ata_port_info *ppi[] = { NULL, NULL };
+ struct ata_port_info pi;
+ const struct ata_port_info *ppi[] = { &pi, NULL };
static int printed_version;
int type = id->driver_data;
u8 fifo;
@@ -628,6 +672,19 @@ static int amd_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
if (type == 1 && pdev->revision > 0x7)
type = 2;
+ /* Serenade ? */
+ if (type == 5 && pdev->subsystem_vendor == PCI_VENDOR_ID_AMD &&
+ pdev->subsystem_device == PCI_DEVICE_ID_AMD_SERENADE)
+ type = 6; /* UDMA 100 only */
+
+ /*
+ * Okay, type is determined now. Apply type-specific workarounds.
+ */
+ pi = info[type];
+
+ if (type < 3)
+ ata_pci_clear_simplex(pdev);
+
/* Check for AMD7411 */
if (type == 3)
/* FIFO is broken */
@@ -635,16 +692,17 @@ static int amd_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
else
pci_write_config_byte(pdev, 0x41, fifo | 0xF0);
- /* Serenade ? */
- if (type == 5 && pdev->subsystem_vendor == PCI_VENDOR_ID_AMD &&
- pdev->subsystem_device == PCI_DEVICE_ID_AMD_SERENADE)
- type = 6; /* UDMA 100 only */
+ /* Cable detection on Nvidia chips doesn't work too well,
+ * cache BIOS programmed UDMA mode.
+ */
+ if (type == 7 || type == 8) {
+ u32 udma;
- if (type < 3)
- ata_pci_clear_simplex(pdev);
+ pci_read_config_dword(pdev, 0x60, &udma);
+ pi.private_data = (void *)(unsigned long)udma;
+ }
/* And fire it up */
- ppi[0] = &info[type];
return ata_pci_init_one(pdev, ppi);
}
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-25 17:15:35 +0000