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/*
* Copyright (C) 2005-2011 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 <linux/gpio.h>
#include <asm/delay.h>
#include <mach/arc_otg.h>
#include <mach/iomux-mx51.h>
#include <mach/iomux-mx53.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include "usb.h"
static struct clk *usb_phy2_clk;
static struct clk *usb_oh3_clk;
static struct clk *usb_ahb_clk;
extern int clk_get_usecount(struct clk *clk);
#define MX5X_USBH1_STP IMX_GPIO_NR(1, 27)
#define MX51_3DS_PHY_RESET IMX_GPIO_NR(2, 5)
#ifdef CONFIG_USB_EHCI_ARC
extern void fsl_usb_recover_hcd(struct platform_device *pdev);
#else
static void fsl_usb_recover_hcd(struct platform_device *pdev)
{; }
#endif
/*
* USB Host1 HS port
*/
static int gpio_usbh1_active(void)
{
iomux_v3_cfg_t usbh1stp_gpio = MX51_PAD_USBH1_STP__GPIO1_27;
iomux_v3_cfg_t phyreset_gpio = MX51_PAD_EIM_D17__GPIO2_1;
int ret;
/* Set USBH1_STP to GPIO and toggle it */
mxc_iomux_v3_setup_pad(usbh1stp_gpio);
ret = gpio_request(MX5X_USBH1_STP, "usbh1_stp");
if (ret) {
pr_debug("failed to get MX51_PAD_USBH1_STP__GPIO_1_27: %d\n", ret);
return ret;
}
gpio_direction_output(MX5X_USBH1_STP, 0);
gpio_set_value(MX5X_USBH1_STP, 1);
/* Signal only used on MX51-3DS for reset to PHY.*/
if (machine_is_mx51_3ds()) {
mxc_iomux_v3_setup_pad(phyreset_gpio);
ret = gpio_request(MX51_3DS_PHY_RESET, "eim_d17");
if (ret) {
pr_debug("failed to get MX51_PAD_EIM_D17__GPIO2_1: %d\n", ret);
return ret;
}
gpio_direction_output(MX51_3DS_PHY_RESET, 0);
gpio_set_value(MX51_3DS_PHY_RESET, 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(MX51_3DS_PHY_RESET);
}
gpio_free(MX5X_USBH1_STP);
}
static void _wake_up_enable(struct fsl_usb2_platform_data *pdata, bool enable)
{
pr_debug("host1, %s, enable is %d\n", __func__, 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(struct fsl_usb2_platform_data *pdata, bool enable)
{
pr_debug("host1, %s, enable is %d\n", __func__, enable);
if (enable) {
UH1_PORTSC1 |= PORTSC_PHCD;
} else {
UH1_PORTSC1 &= ~PORTSC_PHCD;
}
}
static void usbh1_clock_gate(bool on)
{
pr_debug("%s: on is %d\n", __func__, on);
if (on) {
clk_enable(usb_ahb_clk);
clk_enable(usb_oh3_clk);
clk_enable(usb_phy2_clk);
} else {
clk_disable(usb_phy2_clk);
clk_disable(usb_oh3_clk);
clk_disable(usb_ahb_clk);
}
}
static enum usb_wakeup_event _is_usbh1_wakeup(struct fsl_usb2_platform_data *pdata)
{
int wakeup_req = USBCTRL & UCTRL_H1WIR;
if (wakeup_req)
return !WAKEUP_EVENT_INVALID;
return WAKEUP_EVENT_INVALID;
}
static void h1_wakeup_handler(struct fsl_usb2_platform_data *pdata)
{
_wake_up_enable(pdata, false);
_phy_lowpower_suspend(pdata, false);
fsl_usb_recover_hcd(&mxc_usbh1_device);
}
static void usbh1_wakeup_event_clear(void)
{
int wakeup_req = USBCTRL & UCTRL_H1WIR;
if (wakeup_req != 0) {
printk(KERN_INFO "Unknown wakeup.(OTGSC 0x%x)\n", UOG_OTGSC);
/* Disable H1WIE to clear H1WIR, wait 3 clock
* cycles of standly clock(32KHz)
*/
USBCTRL &= ~UCTRL_H1WIE;
udelay(100);
USBCTRL |= UCTRL_H1WIE;
}
}
static int fsl_usb_host_init_ext(struct platform_device *pdev)
{
iomux_v3_cfg_t usbh1stp_func = MX51_PAD_USBH1_STP__USBH1_STP;
int ret;
struct clk *usb_clk;
/* the usb_ahb_clk will be enabled in usb_otg_init */
usb_ahb_clk = clk_get(NULL, "usb_ahb_clk");
if (cpu_is_mx53()) {
usb_clk = clk_get(NULL, "usboh3_clk");
clk_enable(usb_clk);
usb_oh3_clk = usb_clk;
usb_clk = clk_get(NULL, "usb_phy2_clk");
clk_enable(usb_clk);
usb_phy2_clk = usb_clk;
} else if (cpu_is_mx50()) {
usb_clk = clk_get(NULL, "usb_phy2_clk");
clk_enable(usb_clk);
usb_phy2_clk = usb_clk;
} else if (cpu_is_mx51()) {
usb_clk = clk_get(NULL, "usboh3_clk");
clk_enable(usb_clk);
usb_oh3_clk = usb_clk;
}
ret = fsl_usb_host_init(pdev);
if (ret)
return ret;
if (cpu_is_mx51()) {
/* setback USBH1_STP to be function */
#if 0 /* Jasper: Need to do... */
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));
#endif
mxc_iomux_v3_setup_pad(usbh1stp_func);
gpio_free(MX5X_USBH1_STP);
}
/* disable remote wakeup irq */
USBCTRL &= ~UCTRL_H1WIE;
return 0;
}
static void fsl_usb_host_uninit_ext(struct platform_device *pdev)
{
struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
if (cpu_is_mx53()) {
clk_disable(usb_oh3_clk);
clk_put(usb_oh3_clk);
clk_disable(usb_phy2_clk);
clk_put(usb_phy2_clk);
} else if (cpu_is_mx50()) {
clk_disable(usb_phy2_clk);
clk_put(usb_phy2_clk);
} else if (cpu_is_mx51()) {
clk_disable(usb_oh3_clk);
clk_put(usb_oh3_clk);
}
fsl_usb_host_uninit(pdata);
/* usb_ahb_clk will be disabled at usb_common.c */
clk_put(usb_ahb_clk);
}
static struct fsl_usb2_platform_data usbh1_config = {
.name = "Host 1",
.init = fsl_usb_host_init_ext,
.exit = 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 = usbh1_clock_gate,
.phy_lowpower_suspend = _phy_lowpower_suspend,
.is_wakeup_event = _is_usbh1_wakeup,
.wakeup_handler = h1_wakeup_handler,
.transceiver = "utmi",
};
static struct fsl_usb2_wakeup_platform_data usbh1_wakeup_config = {
.name = "USBH1 wakeup",
.usb_clock_for_pm = usbh1_clock_gate,
.usb_pdata = {&usbh1_config, NULL, NULL},
.usb_wakeup_exhandle = usbh1_wakeup_event_clear,
};
void mx5_set_host1_vbus_func(driver_vbus_func driver_vbus)
{
usbh1_config.platform_driver_vbus = driver_vbus;
}
#define MX53_OFFSET 0x20000000
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;
}
if (cpu_is_mx53() || cpu_is_mx50()) {
mxc_usbh1_device.resource[0].start -= MX53_OFFSET;
mxc_usbh1_device.resource[0].end -= MX53_OFFSET;
}
mxc_register_device(&mxc_usbh1_device, &usbh1_config);
usbh1_config.wakeup_pdata = &usbh1_wakeup_config;
mxc_register_device(&mxc_usbh1_wakeup_device, &usbh1_wakeup_config);
}
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