The driver's ide_dma_test_irq() method was reading the MRDMODE register even on
PCI0643/6 where it was write-only -- fix this by always reading the "backward-
compatible" interrupt bits, renaming dma_alt_stat to irq_stat as the interrupt
status bits are not coupled to DMA.
In addition, wrong interrupt bit was tested/cleared for the primary channel --
it's bit 2 in all the chip specs and the driver used bit 1... :-/
Signed-off-by: Sergei Shtylyov <sshtylyov@xxxxxxxxxxxxx>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
---
This is an update due to patch order changes. Has also been tested on PCI-649.
drivers/ide/pci/cmd64x.c | 24 ++++++++++++------------
1 files changed, 12 insertions(+), 12 deletions(-)
Index: linux-2.6/drivers/ide/pci/cmd64x.c
===================================================================
--- linux-2.6.orig/drivers/ide/pci/cmd64x.c
+++ linux-2.6/drivers/ide/pci/cmd64x.c
@@ -1,5 +1,5 @@
/*
- * linux/drivers/ide/pci/cmd64x.c Version 1.43 Mar 10, 2007
+ * linux/drivers/ide/pci/cmd64x.c Version 1.44 Mar 12, 2007
*
* cmd64x.c: Enable interrupts at initialization time on Ultra/PCI machines.
* Due to massive hardware bugs, UltraDMA is only supported
@@ -36,7 +36,7 @@
* CMD64x specific registers definition.
*/
#define CFR 0x50
-#define CFR_INTR_CH0 0x02
+#define CFR_INTR_CH0 0x04
#define CNTRL 0x51
#define CNTRL_DIS_RA0 0x40
#define CNTRL_DIS_RA1 0x80
@@ -488,19 +488,19 @@ static int cmd64x_ide_dma_end (ide_drive
static int cmd64x_ide_dma_test_irq (ide_drive_t *drive)
{
- ide_hwif_t *hwif = HWIF(drive);
- struct pci_dev *dev = hwif->pci_dev;
- u8 dma_alt_stat = 0, mask = (hwif->channel) ? MRDMODE_INTR_CH1 :
- MRDMODE_INTR_CH0;
- u8 dma_stat = inb(hwif->dma_status);
+ ide_hwif_t *hwif = HWIF(drive);
+ struct pci_dev *dev = hwif->pci_dev;
+ u8 irq_reg = hwif->channel ? ARTTIM23 : CFR;
+ u8 irq_stat = 0, mask = hwif->channel ? ARTTIM23_INTR_CH1 : CFR_INTR_CH0;
+ u8 dma_stat = inb(hwif->dma_status);
+
+ (void) pci_read_config_byte(dev, irq_reg, &irq_stat);
- (void) pci_read_config_byte(dev, MRDMODE, &dma_alt_stat);
#ifdef DEBUG
- printk("%s: dma_stat: 0x%02x dma_alt_stat: "
- "0x%02x mask: 0x%02x\n", drive->name,
- dma_stat, dma_alt_stat, mask);
+ printk("%s: dma_stat: 0x%02x irq_stat: 0x%02x mask: 0x%02x\n",
+ drive->name, dma_stat, irq_stat, mask);
#endif
- if (!(dma_alt_stat & mask))
+ if (!(irq_stat & mask))
return 0;
/* return 1 if INTR asserted */
-
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