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Commit 2ba5a2c0 authored by Dinh Nguyen's avatar Dinh Nguyen Committed by Sascha Hauer
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mx5: enable usb gadget for freescale mx51 babbage board 



This patch enables usb gadget for freescale mx51 babbage hw. By default,
the OTG port will be in device mode. To put the OTG port into Host mode,
pass "otg_mode=host" in the exec command.

This patch applies to 2.6.34-rc7.

Signed-off-by: default avatarDinh Nguyen <Dinh.Nguyen@freescale.com>
Signed-off-by: default avatarSascha Hauer <s.hauer@pengutronix.de>
parent c79504e7

arch/arm/mach-mx5/board-mx51_babbage.c

+27 −1
Original line number Diff line number Diff line
@@ -15,6 +15,7 @@ 
#include <linux/gpio.h>

#include <linux/delay.h>

#include <linux/io.h>

#include <linux/fsl_devices.h>



#include <mach/common.h>

#include <mach/hardware.h>
@@ -179,12 +180,32 @@ static struct mxc_usbh_platform_data dr_utmi_config = { 
	.flags	= MXC_EHCI_INTERNAL_PHY,

};



static struct fsl_usb2_platform_data usb_pdata = {

	.operating_mode	= FSL_USB2_DR_DEVICE,

	.phy_mode	= FSL_USB2_PHY_UTMI_WIDE,

};



static struct mxc_usbh_platform_data usbh1_config = {

	.init		= initialize_usbh1_port,

	.portsc	= MXC_EHCI_MODE_ULPI,

	.flags	= (MXC_EHCI_POWER_PINS_ENABLED | MXC_EHCI_ITC_NO_THRESHOLD),

};



static int otg_mode_host;



static int __init babbage_otg_mode(char *options)

{

	if (!strcmp(options, "host"))

		otg_mode_host = 1;

	else if (!strcmp(options, "device"))

		otg_mode_host = 0;

	else

		pr_info("otg_mode neither \"host\" nor \"device\". "

			"Defaulting to device\n");

	return 0;

}

__setup("otg_mode=", babbage_otg_mode);



/*

 * Board specific initialization.

 */
@@ -197,7 +218,12 @@ static void __init mxc_board_init(void) 
	mxc_init_imx_uart();

	platform_add_devices(devices, ARRAY_SIZE(devices));



	if (otg_mode_host)

		mxc_register_device(&mxc_usbdr_host_device, &dr_utmi_config);

	else {

		initialize_otg_port(NULL);

		mxc_register_device(&mxc_usbdr_udc_device, &usb_pdata);

	}



	gpio_usbh1_active();

	mxc_register_device(&mxc_usbh1_device, &usbh1_config);

arch/arm/mach-mx5/clock-mx51.c

+2 −0
Original line number Diff line number Diff line
@@ -818,6 +818,8 @@ static struct clk_lookup lookups[] = { 
	_REGISTER_CLOCK("mxc-ehci.0", "usb_ahb", ahb_clk)

	_REGISTER_CLOCK("mxc-ehci.1", "usb", usboh3_clk)

	_REGISTER_CLOCK("mxc-ehci.1", "usb_ahb", ahb_clk)

	_REGISTER_CLOCK("fsl-usb2-udc", "usb", usboh3_clk)

	_REGISTER_CLOCK("fsl-usb2-udc", "usb_ahb", ahb_clk)

};



static void clk_tree_init(void)

arch/arm/mach-mx5/devices.c

+12 −0
Original line number Diff line number Diff line
@@ -107,6 +107,18 @@ static struct resource usbotg_resources[] = { 
	},

};



/* OTG gadget device */

struct platform_device mxc_usbdr_udc_device = {

	.name		= "fsl-usb2-udc",

	.id		= -1,

	.num_resources	= ARRAY_SIZE(usbotg_resources),

	.resource	= usbotg_resources,

	.dev		= {

		.dma_mask		= &usb_dma_mask,

		.coherent_dma_mask	= DMA_BIT_MASK(32),

	},

};



struct platform_device mxc_usbdr_host_device = {

	.name = "mxc-ehci",

	.id = 0,

arch/arm/mach-mx5/devices.h

+1 −0
Original line number Diff line number Diff line
@@ -4,3 +4,4 @@ extern struct platform_device mxc_uart_device2; 
extern struct platform_device mxc_fec_device;

extern struct platform_device mxc_usbdr_host_device;

extern struct platform_device mxc_usbh1_device;

extern struct platform_device mxc_usbdr_udc_device;