* Copyright (C) 2012 Samsung Electronics Co.Ltd
* Vivek Gautam <gautam.vivek@samsung.com>
*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
- * MA 02110-1301 USA
+ * SPDX-License-Identifier: GPL-2.0+
*/
#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;
+ struct ehci_hccr *hcd;
+};
+
+static struct exynos_ehci exynos;
+
+#ifdef CONFIG_OF_CONTROL
+static int exynos_usb_parse_dt(const void *blob, struct exynos_ehci *exynos)
+{
+ fdt_addr_t addr;
+ 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
+ */
+ addr = fdtdec_get_addr(blob, node, "reg");
+ if (addr == FDT_ADDR_T_NONE) {
+ debug("Can't get the EHCI register address\n");
+ return -ENXIO;
+ }
+
+ exynos->hcd = (struct ehci_hccr *)addr;
+
+ 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;
+}
+#endif
+
/* Setup the EHCI host controller. */
static void setup_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 *ctx = &exynos;
+
+#ifdef CONFIG_OF_CONTROL
+ if (exynos_usb_parse_dt(gd->fdt_blob, ctx)) {
+ debug("Unable to parse device tree for ehci-exynos\n");
+ return -ENODEV;
+ }
+#else
+ ctx->usb = (struct exynos_usb_phy *)samsung_get_base_usb_phy();
+ ctx->hcd = (struct ehci_hccr *)samsung_get_base_usb_ehci();
+#endif
- usb = (struct exynos_usb_phy *)samsung_get_base_usb_phy();
- setup_usb_phy(usb);
+ setup_usb_phy(ctx->usb);
- *hccr = (struct ehci_hccr *)samsung_get_base_usb_ehci();
+ *hccr = ctx->hcd;
*hcor = (struct ehci_hcor *)((uint32_t) *hccr
+ HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
*/
int ehci_hcd_stop(int index)
{
- struct exynos_usb_phy *usb;
+ struct exynos_ehci *ctx = &exynos;
- usb = (struct exynos_usb_phy *)samsung_get_base_usb_phy();
- reset_usb_phy(usb);
+ reset_usb_phy(ctx->usb);
return 0;
}