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authorRajeshwari Shinde <rajeshwari.s@samsung.com>2013-01-07 23:35:03 +0000
committerMinkyu Kang <mk7.kang@samsung.com>2013-01-08 21:14:34 +0900
commite18bf1f9f2d2afa688e30e3f73d52de6a5edf4c1 (patch)
treebf8c6fe5bc60b90fbaa999d15f39a66fe7364f41
parent4d3acb9df35787e50cc6ea4be10d45352c99657c (diff)
downloadu-boot-linaro-stable-e18bf1f9f2d2afa688e30e3f73d52de6a5edf4c1.tar.gz
EHCI: Exynos: Add fdt support
Adding fdt support to ehci-exynos in order to parse register base addresses from the device node. Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com> Signed-off-by: Rajeshwari Shinde <rajeshwari.s@samsung.com> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
-rw-r--r--drivers/usb/host/ehci-exynos.c92
1 files changed, 85 insertions, 7 deletions
diff --git a/drivers/usb/host/ehci-exynos.c b/drivers/usb/host/ehci-exynos.c
index 9f0ed06a8..3ca4c5c33 100644
--- a/drivers/usb/host/ehci-exynos.c
+++ b/drivers/usb/host/ehci-exynos.c
@@ -21,13 +21,71 @@
*/
#include <common.h>
+#include <fdtdec.h>
+#include <libfdt.h>
+#include <malloc.h>
#include <usb.h>
#include <asm/arch/cpu.h>
#include <asm/arch/ehci.h>
#include <asm/arch/system.h>
#include <asm/arch/power.h>
+#include <asm-generic/errno.h>
+#include <linux/compat.h>
#include "ehci.h"
+/* Declare global data pointer */
+DECLARE_GLOBAL_DATA_PTR;
+
+/**
+ * Contains pointers to register base addresses
+ * for the usb controller.
+ */
+struct exynos_ehci {
+ struct exynos_usb_phy *usb;
+ unsigned int *hcd;
+};
+
+static int exynos_usb_parse_dt(const void *blob, struct exynos_ehci *exynos)
+{
+ unsigned int node;
+ int depth;
+
+ node = fdtdec_next_compatible(blob, 0, COMPAT_SAMSUNG_EXYNOS_EHCI);
+ if (node <= 0) {
+ debug("EHCI: Can't get device node for ehci\n");
+ return -ENODEV;
+ }
+
+ /*
+ * Get the base address for EHCI controller from the device node
+ */
+ exynos->hcd = (unsigned int *)fdtdec_get_addr(blob, node, "reg");
+ if (exynos->hcd == NULL) {
+ debug("Can't get the EHCI register address\n");
+ return -ENXIO;
+ }
+
+ depth = 0;
+ node = fdtdec_next_compatible_subnode(blob, node,
+ COMPAT_SAMSUNG_EXYNOS_USB_PHY, &depth);
+ if (node <= 0) {
+ debug("EHCI: Can't get device node for usb-phy controller\n");
+ return -ENODEV;
+ }
+
+ /*
+ * Get the base address for usbphy from the device node
+ */
+ exynos->usb = (struct exynos_usb_phy *)fdtdec_get_addr(blob, node,
+ "reg");
+ if (exynos->usb == NULL) {
+ debug("Can't get the usbphy register address\n");
+ return -ENXIO;
+ }
+
+ return 0;
+}
+
/* Setup the EHCI host controller. */
static void setup_usb_phy(struct exynos_usb_phy *usb)
{
@@ -86,12 +144,20 @@ 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_ehci *exynos = NULL;
+
+ exynos = (struct exynos_ehci *)
+ kzalloc(sizeof(struct exynos_ehci), GFP_KERNEL);
+ if (!exynos) {
+ debug("failed to allocate exynos ehci context\n");
+ return -ENOMEM;
+ }
- usb = (struct exynos_usb_phy *)samsung_get_base_usb_phy();
- setup_usb_phy(usb);
+ exynos_usb_parse_dt(gd->fdt_blob, exynos);
- *hccr = (struct ehci_hccr *)samsung_get_base_usb_ehci();
+ setup_usb_phy(exynos->usb);
+
+ *hccr = (struct ehci_hccr *)(exynos->hcd);
*hcor = (struct ehci_hcor *)((uint32_t) *hccr
+ HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
@@ -99,6 +165,8 @@ 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)));
+ kfree(exynos);
+
return 0;
}
@@ -108,10 +176,20 @@ 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_ehci *exynos = NULL;
+
+ exynos = (struct exynos_ehci *)
+ kzalloc(sizeof(struct exynos_ehci), GFP_KERNEL);
+ if (!exynos) {
+ debug("failed to allocate exynos ehci context\n");
+ return -ENOMEM;
+ }
+
+ exynos_usb_parse_dt(gd->fdt_blob, exynos);
+
+ reset_usb_phy(exynos->usb);
- usb = (struct exynos_usb_phy *)samsung_get_base_usb_phy();
- reset_usb_phy(usb);
+ kfree(exynos);
return 0;
}