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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>
This commit is contained in:
Rajeshwari Shinde 2013-01-07 23:35:03 +00:00 committed by Minkyu Kang
parent 4d3acb9df3
commit e18bf1f9f2
1 changed files with 85 additions and 7 deletions
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92
drivers/usb/host/ehci-exynos.c
View File

@ -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;
usb = (struct exynos_usb_phy *)samsung_get_base_usb_phy();
setup_usb_phy(usb);
exynos = (struct exynos_ehci *)
kzalloc(sizeof(struct exynos_ehci), GFP_KERNEL);
if (!exynos) {
debug("failed to allocate exynos ehci context\n");
return -ENOMEM;
}
*hccr = (struct ehci_hccr *)samsung_get_base_usb_ehci();
exynos_usb_parse_dt(gd->fdt_blob, exynos);
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;
usb = (struct exynos_usb_phy *)samsung_get_base_usb_phy();
reset_usb_phy(usb);
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);
kfree(exynos);
return 0;
}