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/*
* Copyright (C) 2009-2011 Freescale Semiconductor, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/fsl_devices.h>
#include <mach/arc_otg.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <mach/irqs.h>
#include "usb.h"
extern int clk_get_usecount(struct clk *clk);
extern void fsl_usb_recover_hcd(struct platform_device *pdev);
static struct clk *usb_clk;
static struct clk *usb_phy_clk;
static struct platform_device *h1_pdev;
static void usb_host_phy_resume(struct fsl_usb2_platform_data *plat)
{
fsl_platform_set_usb_phy_dis(plat, 0);
}
static int internal_phy_clk_already_on;
static void usbh1_internal_phy_clock_gate(bool on)
{
u32 tmp;
void __iomem *phy_reg = IO_ADDRESS(USBPHY1_PHYS_ADDR);
if (on) {
internal_phy_clk_already_on += 1;
if (internal_phy_clk_already_on == 1) {
pr_debug ("%s, Clock on UTMI \n", __func__);
tmp = BM_USBPHY_CTRL_SFTRST | BM_USBPHY_CTRL_CLKGATE;
__raw_writel(tmp, phy_reg + HW_USBPHY_CTRL_CLR);
}
} else {
internal_phy_clk_already_on -= 1;
if (internal_phy_clk_already_on == 0) {
pr_debug ("%s, Clock off UTMI \n", __func__);
tmp = BM_USBPHY_CTRL_CLKGATE;
__raw_writel(tmp, phy_reg + HW_USBPHY_CTRL_SET);
}
}
if (internal_phy_clk_already_on < 0)
printk(KERN_ERR "please check internal phy clock ON/OFF sequence \n");
}
static int fsl_usb_host_init_ext(struct platform_device *pdev)
{
usb_clk = clk_get(NULL, "usb_clk1");
clk_enable(usb_clk);
clk_put(usb_clk);
usb_phy_clk = clk_get(NULL, "usb_phy_clk1");
clk_enable(usb_phy_clk);
clk_put(usb_phy_clk);
usbh1_internal_phy_clock_gate(true);
return fsl_usb_host_init(pdev);
}
static void fsl_usb_host_uninit_ext(struct fsl_usb2_platform_data *pdata)
{
fsl_usb_host_uninit(pdata);
usbh1_internal_phy_clock_gate(false);
clk_disable(usb_phy_clk);
clk_disable(usb_clk);
}
static void usbh1_clock_gate(bool on)
{
pr_debug("%s: on is %d\n", __func__, on);
if (on) {
clk_enable(usb_clk);
clk_enable(usb_phy_clk);
} else {
clk_disable(usb_phy_clk);
clk_disable(usb_clk);
}
pr_debug("usb_clk1_ref_count:%d, usb_phy_clk1_ref_count:%d\n", clk_get_usecount(usb_clk), clk_get_usecount(usb_phy_clk));
}
static void _wake_up_enable(struct fsl_usb2_platform_data *pdata, bool enable)
{
u32 tmp;
void __iomem *phy_reg = IO_ADDRESS(pdata->phy_regs);
pr_debug("host1, %s, enable is %d\n", __func__, enable);
if (enable) {
tmp = BM_USBPHY_CTRL_RESUME_IRQ | BM_USBPHY_CTRL_WAKEUP_IRQ;
__raw_writel(tmp, phy_reg + HW_USBPHY_CTRL_CLR);
tmp = (BM_USBPHY_CTRL_ENIRQWAKEUP
| BM_USBPHY_CTRL_ENIDCHG_WKUP
| BM_USBPHY_CTRL_ENDPDMCHG_WKUP);
__raw_writel(tmp, phy_reg + HW_USBPHY_CTRL_SET);
} else {
tmp = BM_USBPHY_CTRL_RESUME_IRQ | BM_USBPHY_CTRL_WAKEUP_IRQ;
__raw_writel(tmp, phy_reg + HW_USBPHY_CTRL_CLR);
tmp = (BM_USBPHY_CTRL_ENIRQWAKEUP
| BM_USBPHY_CTRL_ENIDCHG_WKUP
| BM_USBPHY_CTRL_ENDPDMCHG_WKUP);
__raw_writel(tmp, phy_reg + HW_USBPHY_CTRL_CLR);
/* 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)
{
u32 tmp;
void __iomem *phy_reg = IO_ADDRESS(pdata->phy_regs);
void __iomem *usb_reg = pdata->regs;
pr_debug("host1, %s, enable is %d\n", __func__, enable);
if (enable) {
tmp = __raw_readl(usb_reg + UOG_PORTSC1);
tmp |= PORTSC_PHCD;
__raw_writel(tmp, usb_reg + UOG_PORTSC1);
pr_debug("%s, Poweroff UTMI \n", __func__);
tmp = (BM_USBPHY_PWD_TXPWDFS
| BM_USBPHY_PWD_TXPWDIBIAS
| BM_USBPHY_PWD_TXPWDV2I
| BM_USBPHY_PWD_RXPWDENV
| BM_USBPHY_PWD_RXPWD1PT1
| BM_USBPHY_PWD_RXPWDDIFF
| BM_USBPHY_PWD_RXPWDRX);
__raw_writel(tmp, phy_reg + HW_USBPHY_PWD_SET);
pr_debug ("%s, Polling UTMI enter suspend \n", __func__);
while (tmp & BM_USBPHY_CTRL_UTMI_SUSPENDM)
tmp = __raw_readl(phy_reg + HW_USBPHY_CTRL);
} else {
tmp = (BM_USBPHY_PWD_TXPWDFS
| BM_USBPHY_PWD_TXPWDIBIAS
| BM_USBPHY_PWD_TXPWDV2I
| BM_USBPHY_PWD_RXPWDENV
| BM_USBPHY_PWD_RXPWD1PT1
| BM_USBPHY_PWD_RXPWDDIFF
| BM_USBPHY_PWD_RXPWDRX);
__raw_writel(tmp, phy_reg + HW_USBPHY_PWD_CLR);
tmp = __raw_readl(usb_reg + UOG_PORTSC1);
tmp &= ~PORTSC_PHCD;
__raw_writel(tmp, usb_reg + UOG_PORTSC1);
}
}
static enum usb_wakeup_event _is_usbh1_wakeup(struct fsl_usb2_platform_data *pdata)
{
void __iomem *phy_reg = IO_ADDRESS(pdata->phy_regs);
u32 tmp;
pr_debug("host1, %s\n", __func__);
tmp = BM_USBPHY_CTRL_RESUME_IRQ | BM_USBPHY_CTRL_WAKEUP_IRQ;
if (__raw_readl(phy_reg + HW_USBPHY_CTRL) && tmp) {
__raw_writel(tmp, phy_reg + HW_USBPHY_CTRL_CLR);
return !WAKEUP_EVENT_INVALID;
} else
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(h1_pdev);
}
static void usbh1_wakeup_event_clear(void)
{
void __iomem *phy_reg = IO_ADDRESS(USBPHY1_PHYS_ADDR);
u32 wakeup_irq_bits;
wakeup_irq_bits = BM_USBPHY_CTRL_RESUME_IRQ | BM_USBPHY_CTRL_WAKEUP_IRQ;
if (__raw_readl(phy_reg + HW_USBPHY_CTRL) && wakeup_irq_bits) {
/* clear the wakeup interrupt status */
__raw_writel(wakeup_irq_bits, phy_reg + HW_USBPHY_CTRL_CLR);
}
}
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 */
.platform_resume = usb_host_phy_resume,
.transceiver = "utmi",
.usb_clock_for_pm = usbh1_clock_gate,
.wake_up_enable = _wake_up_enable,
.phy_lowpower_suspend = _phy_lowpower_suspend,
.is_wakeup_event = _is_usbh1_wakeup,
.wakeup_handler = h1_wakeup_handler,
.phy_regs = USBPHY1_PHYS_ADDR,
};
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,
};
/* The resources for kinds of usb devices */
static struct resource usbh1_resources[] = {
[0] = {
.start = (u32) (USBCTRL1_PHYS_ADDR),
.end = (u32) (USBCTRL1_PHYS_ADDR + 0x1ff),
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_USB1,
.flags = IORESOURCE_IRQ,
},
};
static struct resource usbh1_wakeup_resources[] = {
{
.start = IRQ_USB1_WAKEUP, /*wakeup irq*/
.flags = IORESOURCE_IRQ,
},
{
.start = IRQ_USB1,
.flags = IORESOURCE_IRQ,/* usb core irq */
},
};
struct platform_device mxs_usbh1_wakeup_device = {
.name = "usb_wakeup",
.id = 2,
.num_resources = ARRAY_SIZE(usbh1_wakeup_resources),
.resource = usbh1_wakeup_resources,
};
static int __init usbh1_init(void)
{
struct platform_device *pdev;
usbh1_config.wakeup_pdata = &usbh1_wakeup_config;
pdev = host_pdev_register(usbh1_resources,
ARRAY_SIZE(usbh1_resources), &usbh1_config);
h1_pdev = pdev;
pr_debug("%s: \n", __func__);
/* the platform device(usb h1)'s pdata address has changed */
usbh1_wakeup_config.usb_pdata[0] = pdev->dev.platform_data;
mxs_usbh1_wakeup_device.dev.platform_data = &usbh1_wakeup_config;
if (platform_device_register(&mxs_usbh1_wakeup_device))
printk(KERN_ERR "usb h1 wakeup device\n");
else
printk(KERN_INFO "usb h1 wakeup device is registered\n");
return 0;
}
module_init(usbh1_init);
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