From: Ilya Yanok yanok@emcraft.com
Taken from Beagle code. Tested on mcx board (AM3517-based).
Signed-off-by: Ilya Yanok yanok@emcraft.com --- board/ti/beagle/beagle.c | 101 -------------------------- drivers/usb/host/Makefile | 1 + drivers/usb/host/ehci-omap.c | 156 ++++++++++++++++++++++++++++++++++++++++ include/configs/omap3_beagle.h | 3 + 4 files changed, 160 insertions(+), 101 deletions(-) create mode 100644 drivers/usb/host/ehci-omap.c
diff --git a/board/ti/beagle/beagle.c b/board/ti/beagle/beagle.c index 5c04b34..98548ab 100644 --- a/board/ti/beagle/beagle.c +++ b/board/ti/beagle/beagle.c @@ -42,15 +42,6 @@ #include <asm/arch/sys_proto.h> #include <asm/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" #include <command.h>
@@ -445,104 +436,12 @@ int board_mmc_init(bd_t *bis) #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"); - gpio_set_value(GPIO_PHY_RESET, 0); - writel(OMAP_UHH_SYSCONFIG_SOFTRESET, OMAP3_UHH_BASE + OMAP_UHH_SYSCONFIG); - /* disable USB clocks */ - struct prcm *prcm_base = (struct prcm *)PRCM_BASE; - sr32(&prcm_base->iclken_usbhost, 0, 1, 0); - sr32(&prcm_base->fclken_usbhost, 0, 2, 0); - sr32(&prcm_base->iclken3_core, 2, 1, 0); - sr32(&prcm_base->fclken3_core, 2, 1, 0); - 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 */ - gpio_request(GPIO_PHY_RESET, ""); - gpio_direction_output(GPIO_PHY_RESET, 0); - gpio_set_value(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); - gpio_set_value(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 */
#ifndef CONFIG_SPL_BUILD diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile index 77e217f..975c3e5 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -43,6 +43,7 @@ endif COBJS-$(CONFIG_USB_EHCI_MXC) += ehci-mxc.o COBJS-$(CONFIG_USB_EHCI_MXS) += ehci-mxs.o COBJS-$(CONFIG_USB_EHCI_MX5) += ehci-mx5.o +COBJS-$(CONFIG_USB_EHCI_OMAP) += ehci-omap.o COBJS-$(CONFIG_USB_EHCI_PPC4XX) += ehci-ppc4xx.o COBJS-$(CONFIG_USB_EHCI_IXP4XX) += ehci-ixp.o COBJS-$(CONFIG_USB_EHCI_KIRKWOOD) += ehci-kirkwood.o diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c new file mode 100644 index 0000000..93d3bb7 --- /dev/null +++ b/drivers/usb/host/ehci-omap.c @@ -0,0 +1,156 @@ +/* + * (C) Copyright 2011 Ilya Yanok, Emcraft Systems + * (C) Copyright 2004-2008 + * Texas Instruments, <www.ti.com> + * + * Derived from Beagle Board code by + * Sunil Kumar sunilsaini05@gmail.com + * Shashi Ranjan shashiranjanmca05@gmail.com + * + * + * 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. + */ +#include <common.h> +#include <usb.h> +#include <asm/io.h> +#include <asm/gpio.h> +#include <asm/arch/clocks.h> +#include <asm/arch/clocks_omap3.h> +#include <asm/arch/ehci_omap3.h> +#include <asm/arch/sys_proto.h> +#include "ehci-core.h" + +inline int __board_usb_init(void) +{ + return 0; +} +int board_usb_init(void) __attribute__((weak, alias("__board_usb_init"))); + +#if defined(CONFIG_OMAP_EHCI_PHY1_RESET_GPIO) || \ + defined(CONFIG_OMAP_EHCI_PHY2_RESET_GPIO) +/* controls PHY(s) reset signal(s) */ +static inline void omap_ehci_phy_reset(int on, int delay) +{ + /* + * Refer ISSUE1: + * Hold the PHY in RESET for enough time till + * PHY is settled and ready + */ + if (delay && !on) + udelay(delay); +#ifdef CONFIG_OMAP_EHCI_PHY1_RESET_GPIO + gpio_request(CONFIG_OMAP_EHCI_PHY1_RESET_GPIO, "USB PHY1 reset"); + gpio_direction_output(CONFIG_OMAP_EHCI_PHY1_RESET_GPIO, !on); +#endif +#ifdef CONFIG_OMAP_EHCI_PHY2_RESET_GPIO + gpio_request(CONFIG_OMAP_EHCI_PHY2_RESET_GPIO, "USB PHY2 reset"); + gpio_direction_output(CONFIG_OMAP_EHCI_PHY2_RESET_GPIO, !on); +#endif + + /* Hold the PHY in RESET for enough time till DIR is high */ + /* Refer: ISSUE1 */ + if (delay && on) + udelay(delay); +} +#else +#define omap_ehci_phy_reset(on, delay) do {} while (0) +#endif + +/* Reset is needed otherwise the kernel-driver will throw an error. */ +int ehci_hcd_stop(void) +{ + debug("Resetting OMAP3 EHCI\n"); + omap_ehci_phy_reset(1, 0); + writel(OMAP_UHH_SYSCONFIG_SOFTRESET, + OMAP3_UHH_BASE + OMAP_UHH_SYSCONFIG); + /* disable USB clocks */ + struct prcm *prcm_base = (struct prcm *)PRCM_BASE; + sr32(&prcm_base->iclken_usbhost, 0, 1, 0); + sr32(&prcm_base->fclken_usbhost, 0, 2, 0); + sr32(&prcm_base->iclken3_core, 2, 1, 0); + sr32(&prcm_base->fclken3_core, 2, 1, 0); + return 0; +} + +/* + * Initialize the OMAP3 EHCI controller and PHY. + * Based on "drivers/usb/host/ehci-omap.c" from Linux 2.6.37. + * See there for additional Copyrights. + */ +int ehci_hcd_init(void) +{ + int ret; + + debug("Initializing OMAP3 EHCI\n"); + + ret = board_usb_init(); + if (ret < 0) + return ret; + + /* Put the PHY in RESET */ + omap_ehci_phy_reset(1, 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); + 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)) + ; + 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); + + omap_ehci_phy_reset(0, 10); + + hccr = (struct ehci_hccr *)(OMAP3_EHCI_BASE); + hcor = (struct ehci_hcor *)(OMAP3_EHCI_BASE + 0x10); + + debug("OMAP3 EHCI init done\n"); + return 0; +} diff --git a/include/configs/omap3_beagle.h b/include/configs/omap3_beagle.h index 91af8a0..b4d6443 100644 --- a/include/configs/omap3_beagle.h +++ b/include/configs/omap3_beagle.h @@ -129,6 +129,9 @@ /* USB EHCI */ #define CONFIG_CMD_USB #define CONFIG_USB_EHCI +#define CONFIG_USB_EHCI_OMAP +/*#define CONFIG_EHCI_DCACHE*/ /* leave it disabled for now */ +#define CONFIG_OMAP_EHCI_PHY1_RESET_GPIO 147 #define CONFIG_SYS_USB_EHCI_MAX_ROOT_PORTS 3 #define CONFIG_USB_HOST_ETHER #define CONFIG_USB_ETHER_SMSC95XX