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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>
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@ -21,13 +21,71 @@
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*/
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*/
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#include <common.h>
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#include <common.h>
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#include <fdtdec.h>
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#include <libfdt.h>
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#include <malloc.h>
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#include <usb.h>
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#include <usb.h>
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#include <asm/arch/cpu.h>
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#include <asm/arch/cpu.h>
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#include <asm/arch/ehci.h>
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#include <asm/arch/ehci.h>
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#include <asm/arch/system.h>
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#include <asm/arch/system.h>
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#include <asm/arch/power.h>
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#include <asm/arch/power.h>
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#include <asm-generic/errno.h>
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#include <linux/compat.h>
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#include "ehci.h"
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#include "ehci.h"
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/* Declare global data pointer */
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DECLARE_GLOBAL_DATA_PTR;
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/**
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* Contains pointers to register base addresses
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* for the usb controller.
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*/
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struct exynos_ehci {
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struct exynos_usb_phy *usb;
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unsigned int *hcd;
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};
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static int exynos_usb_parse_dt(const void *blob, struct exynos_ehci *exynos)
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{
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unsigned int node;
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int depth;
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node = fdtdec_next_compatible(blob, 0, COMPAT_SAMSUNG_EXYNOS_EHCI);
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if (node <= 0) {
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debug("EHCI: Can't get device node for ehci\n");
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return -ENODEV;
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}
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/*
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* Get the base address for EHCI controller from the device node
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*/
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exynos->hcd = (unsigned int *)fdtdec_get_addr(blob, node, "reg");
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if (exynos->hcd == NULL) {
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debug("Can't get the EHCI register address\n");
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return -ENXIO;
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}
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depth = 0;
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node = fdtdec_next_compatible_subnode(blob, node,
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COMPAT_SAMSUNG_EXYNOS_USB_PHY, &depth);
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if (node <= 0) {
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debug("EHCI: Can't get device node for usb-phy controller\n");
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return -ENODEV;
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}
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/*
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* Get the base address for usbphy from the device node
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*/
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exynos->usb = (struct exynos_usb_phy *)fdtdec_get_addr(blob, node,
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"reg");
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if (exynos->usb == NULL) {
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debug("Can't get the usbphy register address\n");
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return -ENXIO;
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}
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return 0;
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}
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/* Setup the EHCI host controller. */
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/* Setup the EHCI host controller. */
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static void setup_usb_phy(struct exynos_usb_phy *usb)
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static void setup_usb_phy(struct exynos_usb_phy *usb)
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{
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{
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@ -86,12 +144,20 @@ static void reset_usb_phy(struct exynos_usb_phy *usb)
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*/
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*/
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int ehci_hcd_init(int index, struct ehci_hccr **hccr, struct ehci_hcor **hcor)
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int ehci_hcd_init(int index, struct ehci_hccr **hccr, struct ehci_hcor **hcor)
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{
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{
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struct exynos_usb_phy *usb;
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struct exynos_ehci *exynos = NULL;
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usb = (struct exynos_usb_phy *)samsung_get_base_usb_phy();
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exynos = (struct exynos_ehci *)
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setup_usb_phy(usb);
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kzalloc(sizeof(struct exynos_ehci), GFP_KERNEL);
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if (!exynos) {
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debug("failed to allocate exynos ehci context\n");
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return -ENOMEM;
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}
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*hccr = (struct ehci_hccr *)samsung_get_base_usb_ehci();
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exynos_usb_parse_dt(gd->fdt_blob, exynos);
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setup_usb_phy(exynos->usb);
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*hccr = (struct ehci_hccr *)(exynos->hcd);
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*hcor = (struct ehci_hcor *)((uint32_t) *hccr
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*hcor = (struct ehci_hcor *)((uint32_t) *hccr
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+ HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
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+ HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
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@ -99,6 +165,8 @@ int ehci_hcd_init(int index, struct ehci_hccr **hccr, struct ehci_hcor **hcor)
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(uint32_t)*hccr, (uint32_t)*hcor,
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(uint32_t)*hccr, (uint32_t)*hcor,
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(uint32_t)HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
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(uint32_t)HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
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kfree(exynos);
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return 0;
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return 0;
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}
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}
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@ -108,10 +176,20 @@ int ehci_hcd_init(int index, struct ehci_hccr **hccr, struct ehci_hcor **hcor)
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*/
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*/
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int ehci_hcd_stop(int index)
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int ehci_hcd_stop(int index)
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{
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{
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struct exynos_usb_phy *usb;
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struct exynos_ehci *exynos = NULL;
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usb = (struct exynos_usb_phy *)samsung_get_base_usb_phy();
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exynos = (struct exynos_ehci *)
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reset_usb_phy(usb);
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kzalloc(sizeof(struct exynos_ehci), GFP_KERNEL);
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if (!exynos) {
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debug("failed to allocate exynos ehci context\n");
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return -ENOMEM;
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}
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exynos_usb_parse_dt(gd->fdt_blob, exynos);
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reset_usb_phy(exynos->usb);
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kfree(exynos);
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return 0;
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return 0;
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}
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}
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