Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758672Ab0DPTRX (ORCPT ); Fri, 16 Apr 2010 15:17:23 -0400 Received: from az33egw02.freescale.net ([192.88.158.103]:35901 "EHLO az33egw02.freescale.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758610Ab0DPTQz (ORCPT ); Fri, 16 Apr 2010 15:16:55 -0400 From: Dinh.Nguyen@freescale.com To: linux-kernel@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, linux@arm.linux.org.uk, s.hauer@pengutronix.de, valentin.longchamp@epfl.ch, daniel@caiaq.de, grant.likely@secretlab.ca, bryan.wu@canonical.com, amit.kucheria@canonical.com, r.herring@freescale.com, Jun.Li@freescale.com, xiao-lizhang@freescale.com, Dinh Nguyen Subject: [PATCHv4 2.6.34-rc4 4/7] mx5: Enable board specific functions for enabling USB host on Babbage Date: Fri, 16 Apr 2010 14:16:08 -0500 Message-Id: <1271445371-18501-4-git-send-email-Dinh.Nguyen@freescale.com> X-Mailer: git-send-email 1.6.0.4 In-Reply-To: <1271445371-18501-3-git-send-email-Dinh.Nguyen@freescale.com> References: <1271445371-18501-1-git-send-email-Dinh.Nguyen@freescale.com> <1271445371-18501-2-git-send-email-Dinh.Nguyen@freescale.com> <1271445371-18501-3-git-send-email-Dinh.Nguyen@freescale.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4094 Lines: 148 From: Dinh Nguyen This patch enables USB host functionality for Host1 and OTG port on Freescale MX51 Babbage HW. This patch contains the board specific HW initialization of the USB HW. This patch applies to 2.6.34-rc4. Signed-off-by: Dinh Nguyen --- arch/arm/mach-mx5/board-mx51_babbage.c | 81 ++++++++++++++++++++++++++++++++ 1 files changed, 81 insertions(+), 0 deletions(-) diff --git a/arch/arm/mach-mx5/board-mx51_babbage.c b/arch/arm/mach-mx5/board-mx51_babbage.c index ee67a71..617f4e2 100644 --- a/arch/arm/mach-mx5/board-mx51_babbage.c +++ b/arch/arm/mach-mx5/board-mx51_babbage.c @@ -12,11 +12,14 @@ #include #include +#include +#include #include #include #include #include +#include #include #include @@ -26,6 +29,9 @@ #include "devices.h" +#define BABBAGE_USB_HUB_RESET (0*32 + 7) /* GPIO_1_7 */ +#define BABBAGE_USBH1_STP (0*32 + 27) /* GPIO_1_27 */ + static struct platform_device *devices[] __initdata = { &mxc_fec_device, }; @@ -46,6 +52,22 @@ static struct pad_desc mx51babbage_pads[] = { MX51_PAD_EIM_D26__UART3_TXD, MX51_PAD_EIM_D27__UART3_RTS, MX51_PAD_EIM_D24__UART3_CTS, + + /* USB HOST1 */ + MX51_PAD_USBH1_CLK__USBH1_CLK, + MX51_PAD_USBH1_DIR__USBH1_DIR, + MX51_PAD_USBH1_NXT__USBH1_NXT, + MX51_PAD_USBH1_DATA0__USBH1_DATA0, + MX51_PAD_USBH1_DATA1__USBH1_DATA1, + MX51_PAD_USBH1_DATA2__USBH1_DATA2, + MX51_PAD_USBH1_DATA3__USBH1_DATA3, + MX51_PAD_USBH1_DATA4__USBH1_DATA4, + MX51_PAD_USBH1_DATA5__USBH1_DATA5, + MX51_PAD_USBH1_DATA6__USBH1_DATA6, + MX51_PAD_USBH1_DATA7__USBH1_DATA7, + + /* USB HUB reset line*/ + MX51_PAD_GPIO_1_7__GPIO1_7, }; /* Serial ports */ @@ -66,15 +88,74 @@ static inline void mxc_init_imx_uart(void) } #endif /* SERIAL_IMX */ +static int gpio_usbh1_active(void) +{ + struct pad_desc usbh1stp_gpio = MX51_PAD_USBH1_STP__GPIO_1_27; + int ret; + + /* Set USBH1_STP to GPIO and toggle it */ + mxc_iomux_v3_setup_pad(&usbh1stp_gpio); + ret = gpio_request(BABBAGE_USBH1_STP, "usbh1_stp"); + + if (ret) { + pr_debug("failed to get MX51_PAD_USBH1_STP__GPIO_1_27: %d\n", ret); + return ret; + } + gpio_direction_output(BABBAGE_USBH1_STP, 0); + gpio_set_value(BABBAGE_USBH1_STP, 1); + msleep(100); + gpio_free(BABBAGE_USBH1_STP); + return 0; +} + +static inline void babbage_usbhub_reset(void) +{ + int ret; + + /* Bring USB hub out of reset */ + ret = gpio_request(BABBAGE_USB_HUB_RESET, "GPIO1_7"); + if (ret) { + printk(KERN_ERR"failed to get GPIO_USB_HUB_RESET: %d\n", ret); + return; + } + gpio_direction_output(BABBAGE_USB_HUB_RESET, 0); + + /* USB HUB RESET - De-assert USB HUB RESET_N */ + msleep(1); + gpio_set_value(BABBAGE_USB_HUB_RESET, 0); + msleep(1); + gpio_set_value(BABBAGE_USB_HUB_RESET, 1); +} + +static struct mxc_usbh_platform_data dr_utmi_config = { + .portsc = MXC_EHCI_UTMI_16BIT, + .flags = MXC_EHCI_INTERNAL_PHY, +}; + +static struct mxc_usbh_platform_data usbh1_config = { + .portsc = MXC_EHCI_MODE_ULPI, + .flags = MXC_EHCI_POWER_PINS_ENABLED, +}; + /* * Board specific initialization. */ static void __init mxc_board_init(void) { + struct pad_desc usbh1stp = MX51_PAD_USBH1_STP__USBH1_STP; + mxc_iomux_v3_setup_multiple_pads(mx51babbage_pads, ARRAY_SIZE(mx51babbage_pads)); mxc_init_imx_uart(); platform_add_devices(devices, ARRAY_SIZE(devices)); + + mxc_register_device(&mxc_usbdr_host_device, &dr_utmi_config); + + gpio_usbh1_active(); + mxc_register_device(&mxc_usbh1_device, &usbh1_config); + /* setback USBH1_STP to be function */ + mxc_iomux_v3_setup_pad(&usbh1stp); + babbage_usbhub_reset(); } static void __init mx51_babbage_timer_init(void) -- 1.6.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/