diff options
| author | Vincent Palatin <vpalatin@chromium.org> | 2012-12-13 22:58:27 -0800 |
|---|---|---|
| committer | Marek Vasut <marex@denx.de> | 2013-03-16 21:12:01 +0100 |
| commit | 7c38e90aff5f5b8b7f7ebc27d8d07c51aececde3 (patch) | |
| tree | d3b8b832d8cd46bd1f729056655c2349f62f4703 /drivers/usb | |
| parent | b5bec88434adb52413f1bc33fa63d7642cb8fd35 (diff) | |
usb: ehci: generic PCI support
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>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/host/ehci-pci.c | 41 |
1 files changed, 40 insertions, 1 deletions
diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c index 29af02dc5b4..001d141e0d4 100644 --- a/drivers/usb/host/ehci-pci.c +++ b/drivers/usb/host/ehci-pci.c @@ -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; } |