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/*
* Copyright (C) 2005-2010 Freescale Semiconductor, Inc. All Rights Reserved.
*/
/*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/delay.h>
#include <linux/clk.h>
#include <linux/platform_device.h>
#include <linux/fsl_devices.h>
#include <asm/delay.h>
#include <mach/arc_otg.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include "usb.h"
#include "iomux.h"
#include "mx51_pins.h"
//#undef pr_debug
//#define pr_debug printk
/*
* USB Host1 HS port
*/
static int gpio_usbh1_active(void)
{
/* Set USBH1_STP to GPIO and toggle it */
mxc_request_iomux(MX51_PIN_USBH1_STP, IOMUX_CONFIG_GPIO |
IOMUX_CONFIG_SION);
gpio_request(IOMUX_TO_GPIO(MX51_PIN_USBH1_STP), "usbh1_stp");
gpio_direction_output(IOMUX_TO_GPIO(MX51_PIN_USBH1_STP), 0);
gpio_set_value(IOMUX_TO_GPIO(MX51_PIN_USBH1_STP), 1);
/* Signal only used on MX51-3DS for reset to PHY.*/
if (machine_is_mx51_3ds()) {
mxc_request_iomux(MX51_PIN_EIM_D17, IOMUX_CONFIG_ALT1);
mxc_iomux_set_pad(MX51_PIN_EIM_D17, PAD_CTL_DRV_HIGH |
PAD_CTL_HYS_NONE | PAD_CTL_PUE_KEEPER |
PAD_CTL_100K_PU | PAD_CTL_ODE_OPENDRAIN_NONE |
PAD_CTL_PKE_ENABLE | PAD_CTL_SRE_FAST);
gpio_request(IOMUX_TO_GPIO(MX51_PIN_EIM_D17), "eim_d17");
gpio_direction_output(IOMUX_TO_GPIO(MX51_PIN_EIM_D17), 0);
gpio_set_value(IOMUX_TO_GPIO(MX51_PIN_EIM_D17), 1);
}
msleep(100);
return 0;
}
static void gpio_usbh1_inactive(void)
{
/* Signal only used on MX51-3DS for reset to PHY.*/
if (machine_is_mx51_3ds()) {
gpio_free(IOMUX_TO_GPIO(MX51_PIN_EIM_D17));
mxc_free_iomux(MX51_PIN_EIM_D17, IOMUX_CONFIG_GPIO);
}
mxc_free_iomux(MX51_PIN_USBH1_STP, IOMUX_CONFIG_GPIO);
gpio_free(IOMUX_TO_GPIO(MX51_PIN_USBH1_STP));
}
static void _wake_up_enable(struct fsl_usb2_platform_data *pdata, bool enable)
{
if (enable)
USBCTRL |= UCTRL_H1WIE;
else {
USBCTRL &= ~UCTRL_H1WIE;
/* The interrupt must be disabled for at least 3
* cycles of the standby clock(32k Hz) , that is 0.094 ms*/
udelay(100);
}
}
static void _phy_lowpower_suspend(bool enable)
{
if (enable) {
UH1_PORTSC1 |= PORTSC_PHCD;
}else {
UH1_PORTSC1 &= ~PORTSC_PHCD;
}
}
static void usbotg_clock_gate(bool on)
{
struct clk *usb_clk;
if (cpu_is_mx50()) {
if (on) {
usb_clk = clk_get(NULL, "usb_ahb_clk");
clk_enable(usb_clk);
clk_put(usb_clk);
} else {
usb_clk = clk_get(NULL, "usb_ahb_clk");
clk_disable(usb_clk);
clk_put(usb_clk);
}
return;
}
if (cpu_is_mx53()) {
usb_clk = clk_get(NULL, "usb_phy2_clk");
if (on) {
clk_enable(usb_clk);
} else {
clk_disable(usb_clk);
}
clk_put(usb_clk);
}
if (on) {
usb_clk = clk_get(NULL, "usb_ahb_clk");
clk_enable(usb_clk);
clk_put(usb_clk);
usb_clk = clk_get(NULL, "usboh3_clk");
clk_enable(usb_clk);
clk_put(usb_clk);
} else {
usb_clk = clk_get(NULL, "usboh3_clk");
clk_disable(usb_clk);
clk_put(usb_clk);
usb_clk = clk_get(NULL, "usb_ahb_clk");
clk_disable(usb_clk);
clk_put(usb_clk);
}
}
static int fsl_usb_host_init_ext(struct platform_device *pdev)
{
int ret;
struct clk *usb_clk;
if (cpu_is_mx53()) {
usb_clk = clk_get(NULL, "usboh3_clk");
clk_enable(usb_clk);
clk_put(usb_clk);
usb_clk = clk_get(&pdev->dev, "usb_phy2_clk");
clk_enable(usb_clk);
clk_put(usb_clk);
/*derive clock from oscillator */
usb_clk = clk_get(NULL, "usb_utmi_clk");
clk_disable(usb_clk);
clk_put(usb_clk);
} else if (cpu_is_mx50()) {
usb_clk = clk_get(NULL, "usb_phy2_clk");
clk_enable(usb_clk);
clk_put(usb_clk);
}
ret = fsl_usb_host_init(pdev);
if (ret)
return ret;
if (cpu_is_mx51()) {
/* setback USBH1_STP to be function */
mxc_request_iomux(MX51_PIN_USBH1_STP, IOMUX_CONFIG_ALT0);
mxc_iomux_set_pad(MX51_PIN_USBH1_STP, PAD_CTL_SRE_FAST |
PAD_CTL_DRV_HIGH | PAD_CTL_ODE_OPENDRAIN_NONE |
PAD_CTL_PUE_KEEPER | PAD_CTL_PKE_ENABLE |
PAD_CTL_HYS_ENABLE | PAD_CTL_DDR_INPUT_CMOS |
PAD_CTL_DRV_VOT_LOW);
gpio_free(IOMUX_TO_GPIO(MX51_PIN_USBH1_STP));
}
/* disable remote wakeup irq */
USBCTRL &= ~UCTRL_H1WIE;
return 0;
}
static void fsl_usb_host_uninit_ext(struct fsl_usb2_platform_data *pdata)
{
struct clk *usb_clk;
if (cpu_is_mx53()) {
usb_clk = clk_get(NULL, "usboh3_clk");
clk_disable(usb_clk);
clk_put(usb_clk);
usb_clk = clk_get(&pdata->pdev->dev, "usb_phy2_clk");
clk_disable(usb_clk);
clk_put(usb_clk);
} else if (cpu_is_mx50()) {
usb_clk = clk_get(NULL, "usb_phy2_clk");
clk_disable(usb_clk);
clk_put(usb_clk);
}
fsl_usb_host_uninit(pdata);
}
static struct fsl_usb2_platform_data usbh1_config = {
.name = "Host 1",
.platform_init = fsl_usb_host_init_ext,
.platform_uninit = fsl_usb_host_uninit_ext,
.operating_mode = FSL_USB2_MPH_HOST,
.phy_mode = FSL_USB2_PHY_UTMI_WIDE,
.power_budget = 500, /* 500 mA max power */
.wake_up_enable = _wake_up_enable,
.usb_clock_for_pm = usbotg_clock_gate,
.phy_lowpower_suspend = _phy_lowpower_suspend,
.transceiver = "utmi",
};
void mx5_set_host1_vbus_func(driver_vbus_func driver_vbus)
{
usbh1_config.platform_driver_vbus = driver_vbus;
}
void __init mx5_usbh1_init(void)
{
if (cpu_is_mx51()) {
usbh1_config.phy_mode = FSL_USB2_PHY_ULPI;
usbh1_config.transceiver = "isp1504";
usbh1_config.gpio_usb_active = gpio_usbh1_active;
usbh1_config.gpio_usb_inactive = gpio_usbh1_inactive;
}
mxc_register_device(&mxc_usbh1_device, &usbh1_config);
}
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