drivers/usb/host/ehci-s5p.c - manifest_repos/salami - Git at Google

 /*
  * SAMSUNG S5P USB HOST EHCI Controller
  *
  * Copyright (C) 2011 Samsung Electronics Co.Ltd
  * Author: Jingoo Han <jg1.han@samsung.com>
  * Author: Joonyoung Shim <jy0922.shim@samsung.com>
  *
  * 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/clk.h>
 #include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/of_gpio.h>
 #include <linux/platform_data/usb-ehci-s5p.h>
 #include <plat/usb-phy.h>

 #define EHCI_INSNREG00(base)			(base + 0x90)
 #define EHCI_INSNREG00_ENA_INCR16		(0x1 << 25)
 #define EHCI_INSNREG00_ENA_INCR8		(0x1 << 24)
 #define EHCI_INSNREG00_ENA_INCR4		(0x1 << 23)
 #define EHCI_INSNREG00_ENA_INCRX_ALIGN		(0x1 << 22)
 #define EHCI_INSNREG00_ENABLE_DMA_BURST	\
 	(EHCI_INSNREG00_ENA_INCR16 | EHCI_INSNREG00_ENA_INCR8 |	\
 	 EHCI_INSNREG00_ENA_INCR4 | EHCI_INSNREG00_ENA_INCRX_ALIGN)

 struct s5p_ehci_hcd {
 	struct device *dev;
 	struct usb_hcd *hcd;
 	struct clk *clk;
 };

 static const struct hc_driver s5p_ehci_hc_driver = {
 	.description		= hcd_name,
 	.product_desc		= "S5P EHCI Host Controller",
 	.hcd_priv_size		= sizeof(struct ehci_hcd),

 	.irq			= ehci_irq,
 	.flags			= HCD_MEMORY | HCD_USB2,

 	.reset			= ehci_setup,
 	.start			= ehci_run,
 	.stop			= ehci_stop,
 	.shutdown		= ehci_shutdown,

 	.get_frame_number	= ehci_get_frame,

 	.urb_enqueue		= ehci_urb_enqueue,
 	.urb_dequeue		= ehci_urb_dequeue,
 	.endpoint_disable	= ehci_endpoint_disable,
 	.endpoint_reset		= ehci_endpoint_reset,

 	.hub_status_data	= ehci_hub_status_data,
 	.hub_control		= ehci_hub_control,
 	.bus_suspend		= ehci_bus_suspend,
 	.bus_resume		= ehci_bus_resume,

 	.relinquish_port	= ehci_relinquish_port,
 	.port_handed_over	= ehci_port_handed_over,

 	.clear_tt_buffer_complete	= ehci_clear_tt_buffer_complete,
 };

 static void s5p_setup_vbus_gpio(struct platform_device *pdev)
 {
 	int err;
 	int gpio;

 	if (!pdev->dev.of_node)
 		return;

 	gpio = of_get_named_gpio(pdev->dev.of_node,
 			"samsung,vbus-gpio", 0);
 	if (!gpio_is_valid(gpio))
 		return;

 	err = gpio_request_one(gpio, GPIOF_OUT_INIT_HIGH, "ehci_vbus_gpio");
 	if (err)
 		dev_err(&pdev->dev, "can't request ehci vbus gpio %d", gpio);
 }

 static u64 ehci_s5p_dma_mask = DMA_BIT_MASK(32);

 static int s5p_ehci_probe(struct platform_device *pdev)
 {
 	struct s5p_ehci_platdata *pdata;
 	struct s5p_ehci_hcd *s5p_ehci;
 	struct usb_hcd *hcd;
 	struct ehci_hcd *ehci;
 	struct resource *res;
 	int irq;
 	int err;

 	pdata = pdev->dev.platform_data;
 	if (!pdata) {
 		dev_err(&pdev->dev, "No platform data defined\n");
 		return -EINVAL;
 	}

 	/*
 	 * Right now device-tree probed devices don't get dma_mask set.
 	 * Since shared usb code relies on it, set it here for now.
 	 * Once we move to full device tree support this will vanish off.
 	 */
 	if (!pdev->dev.dma_mask)
 		pdev->dev.dma_mask = &ehci_s5p_dma_mask;
 	if (!pdev->dev.coherent_dma_mask)
 		pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);

 	s5p_setup_vbus_gpio(pdev);

 	s5p_ehci = devm_kzalloc(&pdev->dev, sizeof(struct s5p_ehci_hcd),
 				GFP_KERNEL);
 	if (!s5p_ehci)
 		return -ENOMEM;

 	s5p_ehci->dev = &pdev->dev;

 	hcd = usb_create_hcd(&s5p_ehci_hc_driver, &pdev->dev,
 					dev_name(&pdev->dev));
 	if (!hcd) {
 		dev_err(&pdev->dev, "Unable to create HCD\n");
 		return -ENOMEM;
 	}

 	s5p_ehci->hcd = hcd;
 	s5p_ehci->clk = devm_clk_get(&pdev->dev, "usbhost");

 	if (IS_ERR(s5p_ehci->clk)) {
 		dev_err(&pdev->dev, "Failed to get usbhost clock\n");
 		err = PTR_ERR(s5p_ehci->clk);
 		goto fail_clk;
 	}

 	err = clk_prepare_enable(s5p_ehci->clk);
 	if (err)
 		goto fail_clk;

 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res) {
 		dev_err(&pdev->dev, "Failed to get I/O memory\n");
 		err = -ENXIO;
 		goto fail_io;
 	}

 	hcd->rsrc_start = res->start;
 	hcd->rsrc_len = resource_size(res);
 	hcd->regs = devm_ioremap(&pdev->dev, res->start, hcd->rsrc_len);
 	if (!hcd->regs) {
 		dev_err(&pdev->dev, "Failed to remap I/O memory\n");
 		err = -ENOMEM;
 		goto fail_io;
 	}

 	irq = platform_get_irq(pdev, 0);
 	if (!irq) {
 		dev_err(&pdev->dev, "Failed to get IRQ\n");
 		err = -ENODEV;
 		goto fail_io;
 	}

 	if (pdata->phy_init)
 		pdata->phy_init(pdev, S5P_USB_PHY_HOST);

 	ehci = hcd_to_ehci(hcd);
 	ehci->caps = hcd->regs;

 	/* DMA burst Enable */
 	writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs));

 	err = usb_add_hcd(hcd, irq, IRQF_SHARED);
 	if (err) {
 		dev_err(&pdev->dev, "Failed to add USB HCD\n");
 		goto fail_io;
 	}

 	platform_set_drvdata(pdev, s5p_ehci);

 	return 0;

 fail_io:
 	clk_disable_unprepare(s5p_ehci->clk);
 fail_clk:
 	usb_put_hcd(hcd);
 	return err;
 }

 static int s5p_ehci_remove(struct platform_device *pdev)
 {
 	struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;
 	struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev);
 	struct usb_hcd *hcd = s5p_ehci->hcd;

 	usb_remove_hcd(hcd);

 	if (pdata && pdata->phy_exit)
 		pdata->phy_exit(pdev, S5P_USB_PHY_HOST);

 	clk_disable_unprepare(s5p_ehci->clk);

 	usb_put_hcd(hcd);

 	return 0;
 }

 static void s5p_ehci_shutdown(struct platform_device *pdev)
 {
 	struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev);
 	struct usb_hcd *hcd = s5p_ehci->hcd;

 	if (hcd->driver->shutdown)
 		hcd->driver->shutdown(hcd);
 }

 #ifdef CONFIG_PM
 static int s5p_ehci_suspend(struct device *dev)
 {
 	struct s5p_ehci_hcd *s5p_ehci = dev_get_drvdata(dev);
 	struct usb_hcd *hcd = s5p_ehci->hcd;
 	bool do_wakeup = device_may_wakeup(dev);
 	struct platform_device *pdev = to_platform_device(dev);
 	struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;
 	int rc;

 	rc = ehci_suspend(hcd, do_wakeup);

 	if (pdata && pdata->phy_exit)
 		pdata->phy_exit(pdev, S5P_USB_PHY_HOST);

 	clk_disable_unprepare(s5p_ehci->clk);

 	return rc;
 }

 static int s5p_ehci_resume(struct device *dev)
 {
 	struct s5p_ehci_hcd *s5p_ehci = dev_get_drvdata(dev);
 	struct usb_hcd *hcd = s5p_ehci->hcd;
 	struct platform_device *pdev = to_platform_device(dev);
 	struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;

 	clk_prepare_enable(s5p_ehci->clk);

 	if (pdata && pdata->phy_init)
 		pdata->phy_init(pdev, S5P_USB_PHY_HOST);

 	/* DMA burst Enable */
 	writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs));

 	ehci_resume(hcd, false);
 	return 0;
 }
 #else
 #define s5p_ehci_suspend	NULL
 #define s5p_ehci_resume		NULL
 #endif

 static const struct dev_pm_ops s5p_ehci_pm_ops = {
 	.suspend	= s5p_ehci_suspend,
 	.resume		= s5p_ehci_resume,
 };

 #ifdef CONFIG_OF
 static const struct of_device_id exynos_ehci_match[] = {
 	{ .compatible = "samsung,exynos-ehci" },
 	{},
 };
 MODULE_DEVICE_TABLE(of, exynos_ehci_match);
 #endif

 static struct platform_driver s5p_ehci_driver = {
 	.probe		= s5p_ehci_probe,
 	.remove		= s5p_ehci_remove,
 	.shutdown	= s5p_ehci_shutdown,
 	.driver = {
 		.name	= "s5p-ehci",
 		.owner	= THIS_MODULE,
 		.pm	= &s5p_ehci_pm_ops,
 		.of_match_table = of_match_ptr(exynos_ehci_match),
 	}
 };

 MODULE_ALIAS("platform:s5p-ehci");
	/*
	* SAMSUNG S5P USB HOST EHCI Controller
	*
	* Copyright (C) 2011 Samsung Electronics Co.Ltd
	* Author: Jingoo Han <jg1.han@samsung.com>
	* Author: Joonyoung Shim <jy0922.shim@samsung.com>
	*
	* 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/clk.h>
	#include <linux/of.h>
	#include <linux/platform_device.h>
	#include <linux/of_gpio.h>
	#include <linux/platform_data/usb-ehci-s5p.h>
	#include <plat/usb-phy.h>

	#define EHCI_INSNREG00(base) (base + 0x90)
	#define EHCI_INSNREG00_ENA_INCR16 (0x1 << 25)
	#define EHCI_INSNREG00_ENA_INCR8 (0x1 << 24)
	#define EHCI_INSNREG00_ENA_INCR4 (0x1 << 23)
	#define EHCI_INSNREG00_ENA_INCRX_ALIGN (0x1 << 22)
	#define EHCI_INSNREG00_ENABLE_DMA_BURST \
	(EHCI_INSNREG00_ENA_INCR16 \| EHCI_INSNREG00_ENA_INCR8 \| \
	EHCI_INSNREG00_ENA_INCR4 \| EHCI_INSNREG00_ENA_INCRX_ALIGN)

	struct s5p_ehci_hcd {
	struct device *dev;
	struct usb_hcd *hcd;
	struct clk *clk;
	};

	static const struct hc_driver s5p_ehci_hc_driver = {
	.description = hcd_name,
	.product_desc = "S5P EHCI Host Controller",
	.hcd_priv_size = sizeof(struct ehci_hcd),

	.irq = ehci_irq,
	.flags = HCD_MEMORY \| HCD_USB2,

	.reset = ehci_setup,
	.start = ehci_run,
	.stop = ehci_stop,
	.shutdown = ehci_shutdown,

	.get_frame_number = ehci_get_frame,

	.urb_enqueue = ehci_urb_enqueue,
	.urb_dequeue = ehci_urb_dequeue,
	.endpoint_disable = ehci_endpoint_disable,
	.endpoint_reset = ehci_endpoint_reset,

	.hub_status_data = ehci_hub_status_data,
	.hub_control = ehci_hub_control,
	.bus_suspend = ehci_bus_suspend,
	.bus_resume = ehci_bus_resume,

	.relinquish_port = ehci_relinquish_port,
	.port_handed_over = ehci_port_handed_over,

	.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
	};

	static void s5p_setup_vbus_gpio(struct platform_device *pdev)
	{
	int err;
	int gpio;

	if (!pdev->dev.of_node)
	return;

	gpio = of_get_named_gpio(pdev->dev.of_node,
	"samsung,vbus-gpio", 0);
	if (!gpio_is_valid(gpio))
	return;

	err = gpio_request_one(gpio, GPIOF_OUT_INIT_HIGH, "ehci_vbus_gpio");
	if (err)
	dev_err(&pdev->dev, "can't request ehci vbus gpio %d", gpio);
	}

	static u64 ehci_s5p_dma_mask = DMA_BIT_MASK(32);

	static int s5p_ehci_probe(struct platform_device *pdev)
	{
	struct s5p_ehci_platdata *pdata;
	struct s5p_ehci_hcd *s5p_ehci;
	struct usb_hcd *hcd;
	struct ehci_hcd *ehci;
	struct resource *res;
	int irq;
	int err;

	pdata = pdev->dev.platform_data;
	if (!pdata) {
	dev_err(&pdev->dev, "No platform data defined\n");
	return -EINVAL;
	}

	/*
	* Right now device-tree probed devices don't get dma_mask set.
	* Since shared usb code relies on it, set it here for now.
	* Once we move to full device tree support this will vanish off.
	*/
	if (!pdev->dev.dma_mask)
	pdev->dev.dma_mask = &ehci_s5p_dma_mask;
	if (!pdev->dev.coherent_dma_mask)
	pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);

	s5p_setup_vbus_gpio(pdev);

	s5p_ehci = devm_kzalloc(&pdev->dev, sizeof(struct s5p_ehci_hcd),
	GFP_KERNEL);
	if (!s5p_ehci)
	return -ENOMEM;

	s5p_ehci->dev = &pdev->dev;

	hcd = usb_create_hcd(&s5p_ehci_hc_driver, &pdev->dev,
	dev_name(&pdev->dev));
	if (!hcd) {
	dev_err(&pdev->dev, "Unable to create HCD\n");
	return -ENOMEM;
	}

	s5p_ehci->hcd = hcd;
	s5p_ehci->clk = devm_clk_get(&pdev->dev, "usbhost");

	if (IS_ERR(s5p_ehci->clk)) {
	dev_err(&pdev->dev, "Failed to get usbhost clock\n");
	err = PTR_ERR(s5p_ehci->clk);
	goto fail_clk;
	}

	err = clk_prepare_enable(s5p_ehci->clk);
	if (err)
	goto fail_clk;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
	dev_err(&pdev->dev, "Failed to get I/O memory\n");
	err = -ENXIO;
	goto fail_io;
	}

	hcd->rsrc_start = res->start;
	hcd->rsrc_len = resource_size(res);
	hcd->regs = devm_ioremap(&pdev->dev, res->start, hcd->rsrc_len);
	if (!hcd->regs) {
	dev_err(&pdev->dev, "Failed to remap I/O memory\n");
	err = -ENOMEM;
	goto fail_io;
	}

	irq = platform_get_irq(pdev, 0);
	if (!irq) {
	dev_err(&pdev->dev, "Failed to get IRQ\n");
	err = -ENODEV;
	goto fail_io;
	}

	if (pdata->phy_init)
	pdata->phy_init(pdev, S5P_USB_PHY_HOST);

	ehci = hcd_to_ehci(hcd);
	ehci->caps = hcd->regs;

	/* DMA burst Enable */
	writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs));

	err = usb_add_hcd(hcd, irq, IRQF_SHARED);
	if (err) {
	dev_err(&pdev->dev, "Failed to add USB HCD\n");
	goto fail_io;
	}

	platform_set_drvdata(pdev, s5p_ehci);

	return 0;

	fail_io:
	clk_disable_unprepare(s5p_ehci->clk);
	fail_clk:
	usb_put_hcd(hcd);
	return err;
	}

	static int s5p_ehci_remove(struct platform_device *pdev)
	{
	struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;
	struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev);
	struct usb_hcd *hcd = s5p_ehci->hcd;

	usb_remove_hcd(hcd);

	if (pdata && pdata->phy_exit)
	pdata->phy_exit(pdev, S5P_USB_PHY_HOST);

	clk_disable_unprepare(s5p_ehci->clk);

	usb_put_hcd(hcd);

	return 0;
	}

	static void s5p_ehci_shutdown(struct platform_device *pdev)
	{
	struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev);
	struct usb_hcd *hcd = s5p_ehci->hcd;

	if (hcd->driver->shutdown)
	hcd->driver->shutdown(hcd);
	}

	#ifdef CONFIG_PM
	static int s5p_ehci_suspend(struct device *dev)
	{
	struct s5p_ehci_hcd *s5p_ehci = dev_get_drvdata(dev);
	struct usb_hcd *hcd = s5p_ehci->hcd;
	bool do_wakeup = device_may_wakeup(dev);
	struct platform_device *pdev = to_platform_device(dev);
	struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;
	int rc;

	rc = ehci_suspend(hcd, do_wakeup);

	if (pdata && pdata->phy_exit)
	pdata->phy_exit(pdev, S5P_USB_PHY_HOST);

	clk_disable_unprepare(s5p_ehci->clk);

	return rc;
	}

	static int s5p_ehci_resume(struct device *dev)
	{
	struct s5p_ehci_hcd *s5p_ehci = dev_get_drvdata(dev);
	struct usb_hcd *hcd = s5p_ehci->hcd;
	struct platform_device *pdev = to_platform_device(dev);
	struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;

	clk_prepare_enable(s5p_ehci->clk);

	if (pdata && pdata->phy_init)
	pdata->phy_init(pdev, S5P_USB_PHY_HOST);

	/* DMA burst Enable */
	writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs));

	ehci_resume(hcd, false);
	return 0;
	}
	#else
	#define s5p_ehci_suspend NULL
	#define s5p_ehci_resume NULL
	#endif

	static const struct dev_pm_ops s5p_ehci_pm_ops = {
	.suspend = s5p_ehci_suspend,
	.resume = s5p_ehci_resume,
	};

	#ifdef CONFIG_OF
	static const struct of_device_id exynos_ehci_match[] = {
	{ .compatible = "samsung,exynos-ehci" },
	{},
	};
	MODULE_DEVICE_TABLE(of, exynos_ehci_match);
	#endif

	static struct platform_driver s5p_ehci_driver = {
	.probe = s5p_ehci_probe,
	.remove = s5p_ehci_remove,
	.shutdown = s5p_ehci_shutdown,
	.driver = {
	.name = "s5p-ehci",
	.owner = THIS_MODULE,
	.pm = &s5p_ehci_pm_ops,
	.of_match_table = of_match_ptr(exynos_ehci_match),
	}
	};

	MODULE_ALIAS("platform:s5p-ehci");