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at_wini: enable busmastering in pci if necessary

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This commit is contained in:
Ben Gras 2013-05-18 13:24:23 +00:00
parent e8681e9929
commit 23e19c89eb
1 changed files with 8 additions and 0 deletions
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8
drivers/at_wini/at_wini.c
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@ -428,6 +428,7 @@ static void init_params_pci(int skip)
for(r = pci_first_dev(&devind, &vid, &did); r != 0; for(r = pci_first_dev(&devind, &vid, &did); r != 0;
r = pci_next_dev(&devind, &vid, &did)) { r = pci_next_dev(&devind, &vid, &did)) {
int quirk = 0; int quirk = 0;
u16_t cr;
/* Except class 01h (mass storage), subclass be 01h (ATA). /* Except class 01h (mass storage), subclass be 01h (ATA).
* Also check listed RAID controllers. * Also check listed RAID controllers.
@ -448,6 +449,13 @@ static void init_params_pci(int skip)
*/ */
irq = pci_attr_r8(devind, PCI_ILR); irq = pci_attr_r8(devind, PCI_ILR);
/* Enable busmastering if necessary. */
cr = pci_attr_r16(devind, PCI_CR);
if (!(cr & PCI_CR_MAST_EN)) {
printf("at_wini%ld: enable busmaster\n", w_instance);
pci_attr_w16(devind, PCI_CR, cr | PCI_CR_MAST_EN);
} else printf("at_wini%ld: busmaster is on\n", w_instance);
/* Any non-compat drives? */ /* Any non-compat drives? */
if (quirk || (interface & (ATA_IF_NOTCOMPAT1 | ATA_IF_NOTCOMPAT2))) { if (quirk || (interface & (ATA_IF_NOTCOMPAT1 | ATA_IF_NOTCOMPAT2))) {
if (w_next_drive >= MAX_DRIVES) if (w_next_drive >= MAX_DRIVES)