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 --- arch/arm/include/asm/arch-omap3/ehci_omap3.h | 58 ++++++++++++++ board/ti/beagle/beagle.c | 106 ++++++++++++++++++++++++++ include/configs/omap3_beagle.h | 6 ++ 3 files changed, 170 insertions(+), 0 deletions(-) create mode 100644 arch/arm/include/asm/arch-omap3/ehci_omap3.h
diff --git a/arch/arm/include/asm/arch-omap3/ehci_omap3.h b/arch/arm/include/asm/arch-omap3/ehci_omap3.h new file mode 100644 index 0000000..cd01f50 --- /dev/null +++ b/arch/arm/include/asm/arch-omap3/ehci_omap3.h @@ -0,0 +1,58 @@ +/* + * (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_ */ diff --git a/board/ti/beagle/beagle.c b/board/ti/beagle/beagle.c index c066d6e..03242c1 100644 --- a/board/ti/beagle/beagle.c +++ b/board/ti/beagle/beagle.c @@ -37,8 +37,19 @@ #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 @@ -273,3 +284,98 @@ 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 */ diff --git a/include/configs/omap3_beagle.h b/include/configs/omap3_beagle.h index 5cfa4cb..ba34e8a 100644 --- a/include/configs/omap3_beagle.h +++ b/include/configs/omap3_beagle.h @@ -121,6 +121,11 @@ #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>
@@ -137,6 +142,7 @@
#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 */
#undef CONFIG_CMD_FLASH /* flinfo, erase, protect */