Hello.
Bartlomiej Zolnierkiewicz wrote:
[PATCH] ide: fix UDMA/MWDMA/SWDMA masks
* use 0x00 instead of 0x80 to disable ->{ultra,mwdma,swdma}_mask
* add udma_mask field to ide_pci_device_t and use it to initialize
->ultra_mask in aec62xx, pdc202xx_new and pdc202xx_old drivers
* fix UDMA masks to match with chipset specific *_ratemask()
(alim15x3, hpt366, serverworks and siimage drivers need UDMA mask
filtering method - done in the next patch)
More issues with aec62xx.c driver, found after looking at the next patch...
Index: b/drivers/ide/pci/aec62xx.c
===================================================================
--- a/drivers/ide/pci/aec62xx.c
+++ b/drivers/ide/pci/aec62xx.c
@@ -270,11 +270,13 @@ static unsigned int __devinit init_chips
static void __devinit init_hwif_aec62xx(ide_hwif_t *hwif)
{
+ struct pci_dev *dev = hwif->pci_dev;
+
hwif->autodma = 0;
hwif->tuneproc = &aec62xx_tune_drive;
hwif->speedproc = &aec62xx_tune_chipset;
- if (hwif->pci_dev->device == PCI_DEVICE_ID_ARTOP_ATP850UF)
+ if (dev->device == PCI_DEVICE_ID_ARTOP_ATP850UF)
hwif->serialized = hwif->channel;
if (hwif->mate)
@@ -286,7 +288,16 @@ static void __devinit init_hwif_aec62xx(
return;
}
- hwif->ultra_mask = 0x7f;
+ hwif->ultra_mask = hwif->cds->udma_mask;
+
+ /* atp865 and atp865r */
+ if (hwif->ultra_mask == 0x3f) {
+ unsigned long io = pci_resource_start(dev, 4);
+
+ if (inb(io) & 0x10)
+ hwif->ultra_mask = 0x7f; /* udma0-6 */
+ }
+
Looks like another intruduced buglet: you're reading DMA command, but
aec62xx_ratemask() was reading DMA status originally for this bit.
hwif->mwdma_mask = 0x07;
hwif->swdma_mask = 0x07;
Hm, caught another nit: this driver doesn't actually support single-word
DMA modes... :-)
Index: b/drivers/ide/pci/alim15x3.c
===================================================================
--- a/drivers/ide/pci/alim15x3.c
+++ b/drivers/ide/pci/alim15x3.c
@@ -765,8 +765,17 @@ static void __devinit init_hwif_common_a
hwif->atapi_dma = 1;
- if (m5229_revision > 0x20)
- hwif->ultra_mask = 0x7f;
+ if (m5229_revision <= 0x20)
+ hwif->ultra_mask = 0x00; /* no udma */
+ else if (m5229_revision < 0xC2)
+ hwif->ultra_mask = 0x07; /* udma0-2 */
+ else if (m5229_revision == 0xC2 || m5229_revision == 0xC3)
+ hwif->ultra_mask = 0x1f; /* udma0-4 */
+ else if (m5229_revision == 0xC4)
+ hwif->ultra_mask = 0x3f; /* udma0-5 */
+ else
+ hwif->ultra_mask = 0x7f; /* udma0-6 */
+
hwif->mwdma_mask = 0x07;
hwif->swdma_mask = 0x07;
Ugh, I'm not seeing any *actual* support for MW/SW DMA in this driver...
And PIO setting via speedproc() method is broken -- it passes to tuneproc()
method mode number not biased by -XFER_PIO_0 beforehand. Will cook up some
patch, maybe... :-/
MBR, Sergei
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