omap3_beagle: enable EHCI and USB storage.

The reset sequence/configuration for ehci is highly board specific,
so this will be done in the source for the board, instead of
introducing several CONFIG_* which would be needed to make those
few lines in beagle.c usable across different OMAP boards.

Signed-off-by: Alexander Holler <holler@ahsoftware.de>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

arch/arm/include/asm/arch-omap3/ehci_omap3.h

+/*
+ * (C) Copyright 2011
+ * Alexander Holler <holler@ahsoftware.de>
+ *
+ * Based on "drivers/usb/host/ehci-omap.c" from Linux 2.6.37
+ *
+ * See there for additional Copyrights.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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
+ */
+#ifndef _EHCI_OMAP3_H_
+#define _EHCI_OMAP3_H_
+
+/* USB/EHCI registers */
+#define OMAP3_USBTLL_BASE				0x48062000UL
+#define OMAP3_UHH_BASE					0x48064000UL
+#define OMAP3_EHCI_BASE					0x48064800UL
+
+/* TLL Register Set */
+#define	OMAP_USBTLL_SYSCONFIG				(0x10)
+#define	OMAP_USBTLL_SYSCONFIG_SOFTRESET			(1 << 1)
+#define	OMAP_USBTLL_SYSCONFIG_ENAWAKEUP			(1 << 2)
+#define	OMAP_USBTLL_SYSCONFIG_SIDLEMODE			(1 << 3)
+#define	OMAP_USBTLL_SYSCONFIG_CACTIVITY			(1 << 8)
+
+#define	OMAP_USBTLL_SYSSTATUS				(0x14)
+#define	OMAP_USBTLL_SYSSTATUS_RESETDONE			(1 << 0)
+
+/* UHH Register Set */
+#define	OMAP_UHH_SYSCONFIG				(0x10)
+#define	OMAP_UHH_SYSCONFIG_SOFTRESET			(1 << 1)
+#define	OMAP_UHH_SYSCONFIG_CACTIVITY			(1 << 8)
+#define	OMAP_UHH_SYSCONFIG_SIDLEMODE			(1 << 3)
+#define	OMAP_UHH_SYSCONFIG_ENAWAKEUP			(1 << 2)
+#define	OMAP_UHH_SYSCONFIG_MIDLEMODE			(1 << 12)
+
+#define	OMAP_UHH_HOSTCONFIG				(0x40)
+#define OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN		(1 << 2)
+#define OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN		(1 << 3)
+#define OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN		(1 << 4)
+
+#endif /* _EHCI_OMAP3_H_ */

board/ti/beagle/beagle.c

@@ -40,8 +40,19 @@
 #include <asm/arch/sys_proto.h>
 #include <asm/arch/gpio.h>
 #include <asm/mach-types.h>
+#ifdef CONFIG_USB_EHCI
+#include <usb.h>
+#include <asm/arch/clocks.h>
+#include <asm/arch/clocks_omap3.h>
+#include <asm/arch/ehci_omap3.h>
+/* from drivers/usb/host/ehci-core.h */
+extern struct ehci_hccr *hccr;
+extern volatile struct ehci_hcor *hcor;
+#endif
 #include "beagle.h"
 
+#define pr_debug(fmt, args...) debug(fmt, ##args)
+
 #define TWL4030_I2C_BUS			0
 #define EXPANSION_EEPROM_I2C_BUS	1
 #define EXPANSION_EEPROM_I2C_ADDRESS	0x50
@@ -324,3 +335,98 @@ int board_mmc_init(bd_t *bis)
 	return 0;
 }
 #endif
+
+#ifdef CONFIG_USB_EHCI
+
+#define GPIO_PHY_RESET 147
+
+/* Reset is needed otherwise the kernel-driver will throw an error. */
+int ehci_hcd_stop(void)
+{
+	pr_debug("Resetting OMAP3 EHCI\n");
+	omap_set_gpio_dataout(GPIO_PHY_RESET, 0);
+	writel(OMAP_UHH_SYSCONFIG_SOFTRESET, OMAP3_UHH_BASE + OMAP_UHH_SYSCONFIG);
+	return 0;
+}
+
+/* Call usb_stop() before starting the kernel */
+void show_boot_progress(int val)
+{
+	if(val == 15)
+		usb_stop();
+}
+
+/*
+ * Initialize the OMAP3 EHCI controller and PHY on the BeagleBoard.
+ * Based on "drivers/usb/host/ehci-omap.c" from Linux 2.6.37.
+ * See there for additional Copyrights.
+ */
+int ehci_hcd_init(void)
+{
+	pr_debug("Initializing OMAP3 ECHI\n");
+
+	/* Put the PHY in RESET */
+	omap_request_gpio(GPIO_PHY_RESET);
+	omap_set_gpio_direction(GPIO_PHY_RESET, 0);
+	omap_set_gpio_dataout(GPIO_PHY_RESET, 0);
+
+	/* Hold the PHY in RESET for enough time till DIR is high */
+	/* Refer: ISSUE1 */
+	udelay(10);
+
+	struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
+	/* Enable USBHOST_L3_ICLK (USBHOST_MICLK) */
+	sr32(&prcm_base->iclken_usbhost, 0, 1, 1);
+	/*
+	 * Enable USBHOST_48M_FCLK (USBHOST_FCLK1)
+	 * and USBHOST_120M_FCLK (USBHOST_FCLK2)
+	 */
+	sr32(&prcm_base->fclken_usbhost, 0, 2, 3);
+	/* Enable USBTTL_ICLK */
+	sr32(&prcm_base->iclken3_core, 2, 1, 1);
+	/* Enable USBTTL_FCLK */
+	sr32(&prcm_base->fclken3_core, 2, 1, 1);
+	pr_debug("USB clocks enabled\n");
+
+	/* perform TLL soft reset, and wait until reset is complete */
+	writel(OMAP_USBTLL_SYSCONFIG_SOFTRESET,
+		OMAP3_USBTLL_BASE + OMAP_USBTLL_SYSCONFIG);
+	/* Wait for TLL reset to complete */
+	while (!(readl(OMAP3_USBTLL_BASE + OMAP_USBTLL_SYSSTATUS)
+			& OMAP_USBTLL_SYSSTATUS_RESETDONE));
+	pr_debug("TLL reset done\n");
+
+	writel(OMAP_USBTLL_SYSCONFIG_ENAWAKEUP |
+		OMAP_USBTLL_SYSCONFIG_SIDLEMODE |
+		OMAP_USBTLL_SYSCONFIG_CACTIVITY,
+		OMAP3_USBTLL_BASE + OMAP_USBTLL_SYSCONFIG);
+
+	/* Put UHH in NoIdle/NoStandby mode */
+	writel(OMAP_UHH_SYSCONFIG_ENAWAKEUP
+		| OMAP_UHH_SYSCONFIG_SIDLEMODE
+		| OMAP_UHH_SYSCONFIG_CACTIVITY
+		| OMAP_UHH_SYSCONFIG_MIDLEMODE,
+		OMAP3_UHH_BASE + OMAP_UHH_SYSCONFIG);
+
+	/* setup burst configurations */
+	writel(OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN
+		| OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN
+		| OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN,
+		OMAP3_UHH_BASE + OMAP_UHH_HOSTCONFIG);
+
+	/*
+	 * Refer ISSUE1:
+	 * Hold the PHY in RESET for enough time till
+	 * PHY is settled and ready
+	 */
+	udelay(10);
+	omap_set_gpio_dataout(GPIO_PHY_RESET, 1);
+
+	hccr = (struct ehci_hccr *)(OMAP3_EHCI_BASE);
+	hcor = (struct ehci_hcor *)(OMAP3_EHCI_BASE + 0x10);
+
+	pr_debug("OMAP3 EHCI init done\n");
+	return 0;
+}
+
+#endif /* CONFIG_USB_EHCI */

include/configs/omap3_beagle.h

@@ -133,6 +133,11 @@
 #define CONFIG_USB_TTY			1
 #define CONFIG_SYS_CONSOLE_IS_IN_ENV	1
 
+/* USB EHCI */
+#define CONFIG_CMD_USB
+#define CONFIG_USB_EHCI
+#define CONFIG_SYS_USB_EHCI_MAX_ROOT_PORTS 3
+
 /* commands to include */
 #include <config_cmd_default.h>
 
@@ -149,6 +154,7 @@
 
 #define CONFIG_CMD_I2C		/* I2C serial bus support	*/
 #define CONFIG_CMD_MMC		/* MMC support			*/
+#define CONFIG_USB_STORAGE	/* USB storage support		*/
 #define CONFIG_CMD_NAND		/* NAND support			*/
 #define CONFIG_CMD_LED		/* LED support			*/