[U-Boot] [PATCH 1/3 V2] EHCI: Exynos: Add fdt support

[Rajeshwari Shinde]

Adding fdt support to ehci-exynos in order to parse
register base addresses from the device node.

Signed-off-by: Vivek Gautam <gautam.vivek at samsung.com>
Signed-off-by: Rajeshwari Shinde <rajeshwari.s at samsung.com>
---
Chnages in V2:
	- Removed checkpatch errors.
 drivers/usb/host/ehci-exynos.c |   59 ++++++++++++++++++++++++++++++++++++---
 1 files changed, 54 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/host/ehci-exynos.c b/drivers/usb/host/ehci-exynos.c
index 9f0ed06..f9189a5 100644
--- a/drivers/usb/host/ehci-exynos.c
+++ b/drivers/usb/host/ehci-exynos.c
@@ -21,6 +21,8 @@
  */
 
 #include <common.h>
+#include <fdtdec.h>
+#include <libfdt.h>
 #include <usb.h>
 #include <asm/arch/cpu.h>
 #include <asm/arch/ehci.h>
@@ -28,6 +30,9 @@
 #include <asm/arch/power.h>
 #include "ehci.h"
 
+/* Declare global data pointer */
+DECLARE_GLOBAL_DATA_PTR;
+
 /* Setup the EHCI host controller. */
 static void setup_usb_phy(struct exynos_usb_phy *usb)
 {
@@ -86,12 +91,39 @@ static void reset_usb_phy(struct exynos_usb_phy *usb)
  */
 int ehci_hcd_init(int index, struct ehci_hccr **hccr, struct ehci_hcor **hcor)
 {
-	struct exynos_usb_phy *usb;
+	struct exynos_usb_phy *usb = NULL;
+	unsigned int *hcd = NULL;
+	unsigned int node;
+
+	node = fdtdec_next_compatible(gd->fdt_blob, 0,
+					COMPAT_SAMSUNG_EXYNOS_EHCI);
+	if (node <= 0) {
+		debug("EHCI: Can't get device tree node for ehci\n");
+		return -1;
+	}
+
+	/*
+	 * Get the base address for usbphy from the device node
+	 */
+	usb = (struct exynos_usb_phy *)fdtdec_get_addr(gd->fdt_blob, node,
+								"phyreg");
+	if (usb == NULL) {
+		debug("Can't get the usbphy register address\n");
+		return -1;
+	}
 
-	usb = (struct exynos_usb_phy *)samsung_get_base_usb_phy();
 	setup_usb_phy(usb);
 
-	*hccr = (struct ehci_hccr *)samsung_get_base_usb_ehci();
+	/*
+	 * Get the base address for XHCI controller from the device node
+	 */
+	hcd = (unsigned int *)fdtdec_get_addr(gd->fdt_blob, node, "reg");
+	if (hcd == NULL) {
+		debug("Can't get the XHCI registere address\n");
+		return -1;
+	}
+
+	*hccr = (struct ehci_hccr *)hcd;
 	*hcor = (struct ehci_hcor *)((uint32_t) *hccr
 				+ HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
 
@@ -108,9 +140,26 @@ int ehci_hcd_init(int index, struct ehci_hccr **hccr, struct ehci_hcor **hcor)
  */
 int ehci_hcd_stop(int index)
 {
-	struct exynos_usb_phy *usb;
+	struct exynos_usb_phy *usb = NULL;
+	unsigned int node;
+
+	node = fdtdec_next_compatible(gd->fdt_blob, 0,
+					COMPAT_SAMSUNG_EXYNOS_EHCI);
+	if (node <= 0) {
+		debug("EHCI: Can't get device tree node for ehci\n");
+		return -1;
+	}
+
+	/*
+	 * Get the base address for usbphy from the device node
+	 */
+	usb = (struct exynos_usb_phy *)fdtdec_get_addr(gd->fdt_blob, node,
+								"phyreg");
+	if (usb == NULL) {
+		debug("Can't get the usbphy register address\n");
+		return -1;
+	}
 
-	usb = (struct exynos_usb_phy *)samsung_get_base_usb_phy();
 	reset_usb_phy(usb);
 
 	return 0;
-- 
1.7.4.4