Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2024-09-21 23:21:58 +00:00
Code Issues Projects Releases Packages Wiki Activity

usb: ehci: generic PCI support

Browse source 
Instead of hardcoding the PCI IDs on the USB controller, use the PCI
class to detect them.

Ensure the busmaster bit is properly set in the PCI configuration.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Vincent Palatin 2012-12-13 22:58:27 -08:00 committed by Marek Vasut
parent b5bec88434
commit 7c38e90aff
1 changed files with 40 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

41
drivers/usb/host/ehci-pci.c
View file

@ -19,6 +19,7 @@
*/
#include <common.h>
#include <errno.h>
#include <pci.h>
#include <usb.h>
@ -32,6 +33,35 @@ static struct pci_device_id ehci_pci_ids[] = {
{0x12D8, 0x400F}, /* Pericom */
{0, 0}
};
#else
static pci_dev_t ehci_find_class(void)
{
int bus;
int devnum;
pci_dev_t bdf;
uint32_t class;
for (bus = 0; bus <= pci_last_busno(); bus++) {
for (devnum = 0; devnum < PCI_MAX_PCI_DEVICES-1; devnum++) {
pci_read_config_dword(PCI_BDF(bus, devnum, 0),
PCI_CLASS_REVISION, &class);
if (class >> 16 == 0xffff)
continue;
for (bdf = PCI_BDF(bus, devnum, 0);
bdf <= PCI_BDF(bus, devnum,
PCI_MAX_PCI_FUNCTIONS - 1);
bdf += PCI_BDF(0, 0, 1)) {
pci_read_config_dword(bdf, PCI_CLASS_REVISION,
&class);
if (class >> 8 == PCI_CLASS_SERIAL_USB_EHCI)
return bdf;
}
}
}
return -ENODEV;
}
#endif
/*
@ -41,9 +71,14 @@ static struct pci_device_id ehci_pci_ids[] = {
int ehci_hcd_init(int index, struct ehci_hccr **hccr, struct ehci_hcor **hcor)
{
pci_dev_t pdev;
uint32_t cmd;
#ifdef CONFIG_PCI_EHCI_DEVICE
pdev = pci_find_devices(ehci_pci_ids, CONFIG_PCI_EHCI_DEVICE);
if (pdev == -1) {
#else
pdev = ehci_find_class();
#endif
if (pdev < 0) {
printf("EHCI host controller not found\n");
return -1;
}
@ -57,6 +92,10 @@ int ehci_hcd_init(int index, struct ehci_hccr **hccr, struct ehci_hcor **hcor)
(uint32_t)*hccr, (uint32_t)*hcor,
(uint32_t)HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
/* enable busmaster */
pci_read_config_dword(pdev, PCI_COMMAND, &cmd);
cmd |= PCI_COMMAND_MASTER;
pci_write_config_dword(pdev, PCI_COMMAND, cmd);
return 0;
}