2010-12-20 13:37:34

by Srinath R

Subject: [Patch v5] AM35xx: Craneboard: Add USB EHCI support

From: Srinath <[email protected]>

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 <[email protected]>
---
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 8ba4047..e56900f 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 = {
@@ -51,10 +58,51 @@ 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")
--
1.7.1.226.g770c5

2010-12-21 06:58:19

by Felipe Balbi

Subject: Re: [Patch v5] AM35xx: Craneboard: Add USB EHCI support

On Mon, Dec 20, 2010 at 06:38:43PM +0530, [email protected] wrote:
>From: Srinath <[email protected]>
>
>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 <[email protected]>

Tony, do you want to make a pull request for you ? I guess this would
only go on next merge window.

If you want to take yourself, here's my acked-by:

Acked-by: Felipe Balbi <[email protected]>

--
balbi