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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2011-10-13 16:54:48 +0400
committerJeff Garzik <jgarzik@redhat.com>2011-10-14 21:22:54 +0400
commitd9d579842e9e10a49e1ba6a16be5ce2757d38cc0 (patch)
tree8303b9d27f3ea8afc484c16f61bf5ee2353260ae /drivers/ata/pata_via.c
parentbff00256f1b2d762dea3d6c2c9dc85d453fa3e8f (diff)
downloadlinux-d9d579842e9e10a49e1ba6a16be5ce2757d38cc0.tar.xz
pata_via: add via_fixup()
* Fix via_init_one() to enable clock on 66 MHz devices (bug introduced in commit 460f531 "pata_via: store UDMA masks in via_isa_bridges table"). * Factor out common code from via_[re]init_one() to via_fixup(). Acked-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/ata/pata_via.c')
-rw-r--r--drivers/ata/pata_via.c49
1 files changed, 23 insertions, 26 deletions
diff --git a/drivers/ata/pata_via.c b/drivers/ata/pata_via.c
index 8e9f5048a10a..255f336cd7ea 100644
--- a/drivers/ata/pata_via.c
+++ b/drivers/ata/pata_via.c
@@ -509,6 +509,27 @@ static void via_config_fifo(struct pci_dev *pdev, unsigned int flags)
}
}
+static void via_fixup(struct pci_dev *pdev, const struct via_isa_bridge *config)
+{
+ u32 timing;
+
+ /* Initialise the FIFO for the enabled channels. */
+ via_config_fifo(pdev, config->flags);
+
+ if (config->udma_mask == ATA_UDMA4) {
+ /* The 66 MHz devices require we enable the clock */
+ pci_read_config_dword(pdev, 0x50, &timing);
+ timing |= 0x80008;
+ pci_write_config_dword(pdev, 0x50, timing);
+ }
+ if (config->flags & VIA_BAD_CLK66) {
+ /* Disable the 66MHz clock on problem devices */
+ pci_read_config_dword(pdev, 0x50, &timing);
+ timing &= ~0x80008;
+ pci_write_config_dword(pdev, 0x50, timing);
+ }
+}
+
/**
* via_init_one - discovery callback
* @pdev: PCI device
@@ -570,7 +591,6 @@ static int via_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
struct pci_dev *isa;
const struct via_isa_bridge *config;
u8 enable;
- u32 timing;
unsigned long flags = id->driver_data;
int rc;
@@ -609,9 +629,6 @@ static int via_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
return -ENODEV;
}
- /* Initialise the FIFO for the enabled channels. */
- via_config_fifo(pdev, config->flags);
-
/* Clock set up */
switch (config->udma_mask) {
case 0x00:
@@ -637,12 +654,7 @@ static int via_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
return -ENODEV;
}
- if (config->flags & VIA_BAD_CLK66) {
- /* Disable the 66MHz clock on problem devices */
- pci_read_config_dword(pdev, 0x50, &timing);
- timing &= ~0x80008;
- pci_write_config_dword(pdev, 0x50, timing);
- }
+ via_fixup(pdev, config);
/* We have established the device type, now fire it up */
return ata_pci_bmdma_init_one(pdev, ppi, &via_sht, (void *)config, 0);
@@ -661,29 +673,14 @@ static int via_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
static int via_reinit_one(struct pci_dev *pdev)
{
- u32 timing;
struct ata_host *host = dev_get_drvdata(&pdev->dev);
- const struct via_isa_bridge *config = host->private_data;
int rc;
rc = ata_pci_device_do_resume(pdev);
if (rc)
return rc;
- via_config_fifo(pdev, config->flags);
-
- if (config->udma_mask == ATA_UDMA4) {
- /* The 66 MHz devices require we enable the clock */
- pci_read_config_dword(pdev, 0x50, &timing);
- timing |= 0x80008;
- pci_write_config_dword(pdev, 0x50, timing);
- }
- if (config->flags & VIA_BAD_CLK66) {
- /* Disable the 66MHz clock on problem devices */
- pci_read_config_dword(pdev, 0x50, &timing);
- timing &= ~0x80008;
- pci_write_config_dword(pdev, 0x50, timing);
- }
+ via_fixup(pdev, host->private_data);
ata_host_resume(host);
return 0;