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/*
* Description:
* Helper functions to support the tegra USB controller
*
* 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.
*/
#include <linux/fsl_devices.h>
#include <linux/platform_device.h>
#include <linux/err.h>
#include <linux/io.h>
#include <mach/usb_phy.h>
static struct tegra_usb_phy *phy;
static struct clk *udc_clk;
static struct clk *emc_clk;
static void *udc_base;
int fsl_udc_clk_init(struct platform_device *pdev)
{
struct resource *res;
int err;
int instance;
struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
udc_clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(udc_clk)) {
dev_err(&pdev->dev, "Can't get udc clock\n");
return PTR_ERR(udc_clk);
}
clk_enable(udc_clk);
emc_clk = clk_get(&pdev->dev, "emc");
if (IS_ERR(emc_clk)) {
dev_err(&pdev->dev, "Can't get emc clock\n");
err = PTR_ERR(emc_clk);
goto err_emc;
}
clk_enable(emc_clk);
clk_set_rate(emc_clk, 400000000);
/* we have to remap the registers ourselves as fsl_udc does not
* export them for us.
*/
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
err = -ENXIO;
goto err0;
}
udc_base = ioremap(res->start, resource_size(res));
if (!udc_base) {
err = -ENOMEM;
goto err0;
}
instance = pdev->id;
if (instance == -1)
instance = 0;
phy = tegra_usb_phy_open(instance, udc_base, pdata->phy_config,
TEGRA_USB_PHY_MODE_DEVICE);
if (IS_ERR(phy)) {
dev_err(&pdev->dev, "Can't open phy\n");
err = PTR_ERR(phy);
goto err1;
}
tegra_usb_phy_power_on(phy);
return 0;
err1:
iounmap(udc_base);
err0:
clk_disable(emc_clk);
clk_put(emc_clk);
err_emc:
clk_disable(udc_clk);
clk_put(udc_clk);
return err;
}
void fsl_udc_clk_finalize(struct platform_device *pdev)
{
}
void fsl_udc_clk_release(void)
{
tegra_usb_phy_close(phy);
iounmap(udc_base);
clk_disable(udc_clk);
clk_put(udc_clk);
clk_disable(emc_clk);
clk_put(emc_clk);
}
void fsl_udc_clk_suspend(void)
{
tegra_usb_phy_power_off(phy);
clk_disable(udc_clk);
clk_disable(emc_clk);
}
void fsl_udc_clk_resume(void)
{
clk_enable(emc_clk);
clk_enable(udc_clk);
tegra_usb_phy_power_on(phy);
}
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