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mx5: enable usb gadget for freescale mx51 babbage board

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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: Dinh Nguyen <Dinh.Nguyen@freescale.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Dinh Nguyen 2010-05-10 13:45:59 -05:00 committed by Sascha Hauer
parent c79504e73a
commit 2ba5a2c0d8
4 changed files with 42 additions and 1 deletions
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28
arch/arm/mach-mx5/board-mx51_babbage.c
View file

@ -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));
mxc_register_device(&mxc_usbdr_host_device, &dr_utmi_config);
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);

2
arch/arm/mach-mx5/clock-mx51.c
View file

@ -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)

12
arch/arm/mach-mx5/devices.c
View file

@ -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,

1
arch/arm/mach-mx5/devices.h
View file

@ -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;