[PATCH 1/2] arm: omap: craneboard: Add USB EHCI support
From: Felipe Balbi <hidden>
Date: 2010-12-23 08:50:30
Also in:
linux-arm-kernel
Subsystem:
arm port, omap2+ support, the rest · Maintainers:
Russell King, Aaro Koskinen, Andreas Kemnade, Kevin Hilman, Roger Quadros, Tony Lindgren, Linus Torvalds
From: Srinath <redacted> AM3517/05 Craneboard has one EHCI interface on board using port1. GPIO35 is used as power enable. GPIO38 is used as port1 PHY reset. History: http://marc.info/?l=linux-omap&w=2&r=1&s=Craneboard%253A%2BAdd%2BUSB%2BEHCI%2Bsupport&q=b Signed-off-by: Srinath <redacted> Signed-off-by: Felipe Balbi <redacted> --- arch/arm/mach-omap2/board-am3517crane.c | 48 +++++++++++++++++++++++++++++++ 1 files changed, 48 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/board-am3517crane.c b/arch/arm/mach-omap2/board-am3517crane.c
index 781ed25..71acb5a 100644
--- a/arch/arm/mach-omap2/board-am3517crane.c
+++ b/arch/arm/mach-omap2/board-am3517crane.c@@ -19,6 +19,7 @@ #include <linux/kernel.h> #include <linux/init.h> +#include <linux/gpio.h> #include <mach/hardware.h> #include <asm/mach-types.h>
@@ -27,8 +28,14 @@ #include <plat/board.h> #include <plat/common.h> +#include <plat/usb.h> #include "mux.h" +#include "control.h" + +#define GPIO_USB_POWER 35 +#define GPIO_USB_NRESET 38 + /* Board initialization */ static struct omap_board_config_kernel am3517_crane_config[] __initdata = {
@@ -52,10 +59,51 @@ static void __init am3517_crane_init_irq(void) omap_init_irq(); } +static struct ehci_hcd_omap_platform_data ehci_pdata __initdata = { + .port_mode[0] = EHCI_HCD_OMAP_MODE_PHY, + .port_mode[1] = EHCI_HCD_OMAP_MODE_UNKNOWN, + .port_mode[2] = EHCI_HCD_OMAP_MODE_UNKNOWN, + + .phy_reset = true, + .reset_gpio_port[0] = GPIO_USB_NRESET, + .reset_gpio_port[1] = -EINVAL, + .reset_gpio_port[2] = -EINVAL +}; + static void __init am3517_crane_init(void) { + int ret; + omap3_mux_init(board_mux, OMAP_PACKAGE_CBB); omap_serial_init(); + + /* Configure GPIO for EHCI port */ + if (omap_mux_init_gpio(GPIO_USB_NRESET, OMAP_PIN_OUTPUT)) { + pr_err("Can not configure mux for GPIO_USB_NRESET %d\n", + GPIO_USB_NRESET); + return; + } + + if (omap_mux_init_gpio(GPIO_USB_POWER, OMAP_PIN_OUTPUT)) { + pr_err("Can not configure mux for GPIO_USB_POWER %d\n", + GPIO_USB_POWER); + return; + } + + ret = gpio_request(GPIO_USB_POWER, "usb_ehci_enable"); + if (ret < 0) { + pr_err("Can not request GPIO %d\n", GPIO_USB_POWER); + return; + } + + ret = gpio_direction_output(GPIO_USB_POWER, 1); + if (ret < 0) { + gpio_free(GPIO_USB_POWER); + pr_err("Unable to initialize EHCI power\n"); + return; + } + + usb_ehci_init(&ehci_pdata); } MACHINE_START(CRANEBOARD, "AM3517/05 CRANEBOARD")
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1.7.3.4.598.g85356