southbrige/intel/bd82x6x: add XHCI overcurrent map config

Change-Id: I9a40e5a1028c7674e6dd54742e6646ba48ce7696
Signed-off-by: Nicolas Reinecke <nr@das-labor.org>
Reviewed-on: http://review.coreboot.org/9449
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <edward.ocallaghan@koparo.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/southbridge/intel/bd82x6x/chip.h

@@ -94,6 +94,8 @@ struct southbridge_intel_bd82x6x_config {
 	uint32_t xhci_switchable_ports;
 	/* Ports which support SuperSpeed (USB 3.0 additional lanes).  */
 	uint32_t superspeed_capable_ports;
+	/* Overcurrent Mapping for USB 3.0 Ports */
+	uint32_t xhci_overcurrent_mapping;
 };
 
 #endif				/* SOUTHBRIDGE_INTEL_BD82X6X_CHIP_H */

src/southbridge/intel/bd82x6x/pch.h

@@ -449,6 +449,7 @@ early_usb_init (const struct southbridge_usb_port *portmap);
 #define USBOCM2		0x35a4	/* 32bit */
 
 /* XHCI USB 3.0 */
+#define XOCM		0xc0	/* 32bit */
 #define XUSB2PRM	0xd4	/* 32bit */
 #define USB3PRM		0xdc	/* 32bit */
 

src/southbridge/intel/bd82x6x/usb_xhci.c

@@ -33,6 +33,9 @@ static void usb_xhci_init(struct device *dev)
 
 	printk(BIOS_DEBUG, "XHCI: Setting up controller.. ");
 
+	if (config->xhci_overcurrent_mapping)
+		pci_write_config32(dev, XOCM, config->xhci_overcurrent_mapping);
+
 	/* lock overcurrent map */
 	reg32 = pci_read_config32(dev, 0x44);
 	reg32 |= 1;