[U-Boot] [PATCH 03/11] usb: ehci: generic PCI support

[Simon Glass]

From: Vincent Palatin <vpalatin at chromium.org>

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 at chromium.org>
---
 drivers/usb/host/ehci-pci.c |   37 +++++++++++++++++++++++++++++++++++++
 1 files changed, 37 insertions(+), 0 deletions(-)

diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c
index 29af02d..0dc0e6e 100644
--- a/drivers/usb/host/ehci-pci.c
+++ b/drivers/usb/host/ehci-pci.c
@@ -32,6 +32,34 @@ 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 == 0x0c0320)
+					return bdf;
+			}
+		}
+	}
+	return -1;
+}
 #endif
 
 /*
@@ -41,8 +69,13 @@ 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);
+#else
+	pdev = ehci_find_class();
+#endif
 	if (pdev == -1) {
 		printf("EHCI host controller not found\n");
 		return -1;
@@ -57,6 +90,10 @@ 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;
 }
 
-- 
1.7.7.3