[linux-block.git] / drivers / usb / dwc3 / dwc3-exynos.c

/**
 * dwc3-exynos.c - Samsung EXYNOS DWC3 Specific Glue layer
 *
 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
 *		http://www.samsung.com
 *
 * Author: Anton Tikhomirov <av.tikhomirov@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/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/platform_data/dwc3-exynos.h>
#include <linux/dma-mapping.h>
#include <linux/clk.h>
#include <linux/usb/otg.h>
#include <linux/usb/nop-usb-xceiv.h>
#include <linux/of.h>

struct dwc3_exynos {
	struct platform_device	*dwc3;
	struct platform_device	*usb2_phy;
	struct platform_device	*usb3_phy;
	struct device		*dev;

	struct clk		*clk;
};

static int dwc3_exynos_register_phys(struct dwc3_exynos *exynos)
{
	struct nop_usb_xceiv_platform_data pdata;
	struct platform_device	*pdev;
	int			ret;

	memset(&pdata, 0x00, sizeof(pdata));

	pdev = platform_device_alloc("nop_usb_xceiv", PLATFORM_DEVID_AUTO);
	if (!pdev)
		return -ENOMEM;

	exynos->usb2_phy = pdev;
	pdata.type = USB_PHY_TYPE_USB2;

	ret = platform_device_add_data(exynos->usb2_phy, &pdata, sizeof(pdata));
	if (ret)
		goto err1;

	pdev = platform_device_alloc("nop_usb_xceiv", PLATFORM_DEVID_AUTO);
	if (!pdev) {
		ret = -ENOMEM;
		goto err1;
	}

	exynos->usb3_phy = pdev;
	pdata.type = USB_PHY_TYPE_USB3;

	ret = platform_device_add_data(exynos->usb3_phy, &pdata, sizeof(pdata));
	if (ret)
		goto err2;

	ret = platform_device_add(exynos->usb2_phy);
	if (ret)
		goto err2;

	ret = platform_device_add(exynos->usb3_phy);
	if (ret)
		goto err3;

	return 0;

err3:
	platform_device_del(exynos->usb2_phy);

err2:
	platform_device_put(exynos->usb3_phy);

err1:
	platform_device_put(exynos->usb2_phy);

	return ret;
}

static u64 dwc3_exynos_dma_mask = DMA_BIT_MASK(32);

static int dwc3_exynos_probe(struct platform_device *pdev)
{
	struct platform_device	*dwc3;
	struct dwc3_exynos	*exynos;
	struct clk		*clk;
	struct device		*dev = &pdev->dev;

	int			ret = -ENOMEM;

	exynos = devm_kzalloc(dev, sizeof(*exynos), GFP_KERNEL);
	if (!exynos) {
		dev_err(dev, "not enough memory\n");
		return -ENOMEM;
	}

	/*
	 * 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 = &dwc3_exynos_dma_mask;

	platform_set_drvdata(pdev, exynos);

	ret = dwc3_exynos_register_phys(exynos);
	if (ret) {
		dev_err(dev, "couldn't register PHYs\n");
		return ret;
	}

	dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
	if (!dwc3) {
		dev_err(dev, "couldn't allocate dwc3 device\n");
		return -ENOMEM;
	}

	clk = devm_clk_get(dev, "usbdrd30");
	if (IS_ERR(clk)) {
		dev_err(dev, "couldn't get clock\n");
		ret = -EINVAL;
		goto err1;
	}

	dma_set_coherent_mask(&dwc3->dev, dev->coherent_dma_mask);

	dwc3->dev.parent = dev;
	dwc3->dev.dma_mask = dev->dma_mask;
	dwc3->dev.dma_parms = dev->dma_parms;
	exynos->dwc3	= dwc3;
	exynos->dev	= dev;
	exynos->clk	= clk;

	clk_enable(exynos->clk);

	ret = platform_device_add_resources(dwc3, pdev->resource,
			pdev->num_resources);
	if (ret) {
		dev_err(dev, "couldn't add resources to dwc3 device\n");
		goto err2;
	}

	ret = platform_device_add(dwc3);
	if (ret) {
		dev_err(dev, "failed to register dwc3 device\n");
		goto err2;
	}

	return 0;

err2:
	clk_disable(clk);
err1:
	platform_device_put(dwc3);

	return ret;
}

static int dwc3_exynos_remove(struct platform_device *pdev)
{
	struct dwc3_exynos	*exynos = platform_get_drvdata(pdev);

	platform_device_unregister(exynos->dwc3);
	platform_device_unregister(exynos->usb2_phy);
	platform_device_unregister(exynos->usb3_phy);

	clk_disable(exynos->clk);

	return 0;
}

#ifdef CONFIG_OF
static const struct of_device_id exynos_dwc3_match[] = {
	{ .compatible = "samsung,exynos5250-dwusb3" },
	{},
};
MODULE_DEVICE_TABLE(of, exynos_dwc3_match);
#endif

static struct platform_driver dwc3_exynos_driver = {
	.probe		= dwc3_exynos_probe,
	.remove		= dwc3_exynos_remove,
	.driver		= {
		.name	= "exynos-dwc3",
		.of_match_table = of_match_ptr(exynos_dwc3_match),
	},
};

module_platform_driver(dwc3_exynos_driver);

MODULE_ALIAS("platform:exynos-dwc3");
MODULE_AUTHOR("Anton Tikhomirov <av.tikhomirov@samsung.com>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("DesignWare USB3 EXYNOS Glue Layer");
Commit	Line	Data
d28a9689 AT	1	/**
	2	* dwc3-exynos.c - Samsung EXYNOS DWC3 Specific Glue layer
	3	*
	4	* Copyright (c) 2012 Samsung Electronics Co., Ltd.
	5	* http://www.samsung.com
	6	*
	7	* Author: Anton Tikhomirov <av.tikhomirov@samsung.com>
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; either version 2 of the License, or
	12	* (at your option) any later version.
	13	*/
	14
	15	#include <linux/module.h>
	16	#include <linux/kernel.h>
	17	#include <linux/slab.h>
	18	#include <linux/platform_device.h>
	19	#include <linux/platform_data/dwc3-exynos.h>
	20	#include <linux/dma-mapping.h>
d28a9689	21	#include <linux/clk.h>
d720f057 FB	22	#include <linux/usb/otg.h>
d720f057 FB	23	#include <linux/usb/nop-usb-xceiv.h>
accefdd4	24	#include <linux/of.h>
d28a9689	25
d28a9689 AT	26	struct dwc3_exynos {
d28a9689 AT	27	struct platform_device *dwc3;
d720f057 FB	28	struct platform_device *usb2_phy;
d720f057 FB	29	struct platform_device *usb3_phy;
d28a9689 AT	30	struct device *dev;
	31
	32	struct clk *clk;
	33	};
	34
41ac7b3a	35	static int dwc3_exynos_register_phys(struct dwc3_exynos *exynos)
d720f057 FB	36	{
	37	struct nop_usb_xceiv_platform_data pdata;
	38	struct platform_device *pdev;
	39	int ret;
	40
	41	memset(&pdata, 0x00, sizeof(pdata));
	42
b0e45ddb	43	pdev = platform_device_alloc("nop_usb_xceiv", PLATFORM_DEVID_AUTO);
d720f057 FB	44	if (!pdev)
	45	return -ENOMEM;
	46
	47	exynos->usb2_phy = pdev;
	48	pdata.type = USB_PHY_TYPE_USB2;
	49
	50	ret = platform_device_add_data(exynos->usb2_phy, &pdata, sizeof(pdata));
	51	if (ret)
	52	goto err1;
	53
b0e45ddb	54	pdev = platform_device_alloc("nop_usb_xceiv", PLATFORM_DEVID_AUTO);
d720f057 FB	55	if (!pdev) {
	56	ret = -ENOMEM;
	57	goto err1;
	58	}
	59
	60	exynos->usb3_phy = pdev;
	61	pdata.type = USB_PHY_TYPE_USB3;
	62
	63	ret = platform_device_add_data(exynos->usb3_phy, &pdata, sizeof(pdata));
	64	if (ret)
	65	goto err2;
	66
	67	ret = platform_device_add(exynos->usb2_phy);
	68	if (ret)
	69	goto err2;
	70
	71	ret = platform_device_add(exynos->usb3_phy);
	72	if (ret)
	73	goto err3;
	74
	75	return 0;
	76
	77	err3:
	78	platform_device_del(exynos->usb2_phy);
	79
	80	err2:
	81	platform_device_put(exynos->usb3_phy);
	82
	83	err1:
	84	platform_device_put(exynos->usb2_phy);
	85
	86	return ret;
	87	}
	88
accefdd4 VG	89	static u64 dwc3_exynos_dma_mask = DMA_BIT_MASK(32);
accefdd4 VG	90
41ac7b3a	91	static int dwc3_exynos_probe(struct platform_device *pdev)
d28a9689	92	{
d28a9689 AT	93	struct platform_device *dwc3;
	94	struct dwc3_exynos *exynos;
	95	struct clk *clk;
20b97dc1	96	struct device *dev = &pdev->dev;
d28a9689	97
d28a9689 AT	98	int ret = -ENOMEM;
d28a9689 AT	99
20b97dc1	100	exynos = devm_kzalloc(dev, sizeof(*exynos), GFP_KERNEL);
d28a9689	101	if (!exynos) {
20b97dc1 JH	102	dev_err(dev, "not enough memory\n");
20b97dc1 JH	103	return -ENOMEM;
d28a9689 AT	104	}
d28a9689 AT	105
accefdd4 VG	106	/*
	107	* Right now device-tree probed devices don't get dma_mask set.
	108	* Since shared usb code relies on it, set it here for now.
	109	* Once we move to full device tree support this will vanish off.
	110	*/
	111	if (!pdev->dev.dma_mask)
	112	pdev->dev.dma_mask = &dwc3_exynos_dma_mask;
	113
d28a9689 AT	114	platform_set_drvdata(pdev, exynos);
d28a9689 AT	115
d720f057 FB	116	ret = dwc3_exynos_register_phys(exynos);
d720f057 FB	117	if (ret) {
20b97dc1 JH	118	dev_err(dev, "couldn't register PHYs\n");
20b97dc1 JH	119	return ret;
d720f057 FB	120	}
d720f057 FB	121
124dafde	122	dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
d28a9689	123	if (!dwc3) {
20b97dc1 JH	124	dev_err(dev, "couldn't allocate dwc3 device\n");
20b97dc1 JH	125	return -ENOMEM;
d28a9689 AT	126	}
d28a9689 AT	127
20b97dc1	128	clk = devm_clk_get(dev, "usbdrd30");
d28a9689	129	if (IS_ERR(clk)) {
20b97dc1	130	dev_err(dev, "couldn't get clock\n");
d28a9689	131	ret = -EINVAL;
20b97dc1	132	goto err1;
d28a9689 AT	133	}
d28a9689 AT	134
20b97dc1	135	dma_set_coherent_mask(&dwc3->dev, dev->coherent_dma_mask);
d28a9689	136
20b97dc1 JH	137	dwc3->dev.parent = dev;
	138	dwc3->dev.dma_mask = dev->dma_mask;
	139	dwc3->dev.dma_parms = dev->dma_parms;
d28a9689	140	exynos->dwc3 = dwc3;
20b97dc1	141	exynos->dev = dev;
d28a9689 AT	142	exynos->clk = clk;
	143
	144	clk_enable(exynos->clk);
	145
d28a9689 AT	146	ret = platform_device_add_resources(dwc3, pdev->resource,
	147	pdev->num_resources);
	148	if (ret) {
20b97dc1 JH	149	dev_err(dev, "couldn't add resources to dwc3 device\n");
20b97dc1 JH	150	goto err2;
d28a9689 AT	151	}
	152
	153	ret = platform_device_add(dwc3);
	154	if (ret) {
20b97dc1 JH	155	dev_err(dev, "failed to register dwc3 device\n");
20b97dc1 JH	156	goto err2;
d28a9689 AT	157	}
	158
	159	return 0;
	160
20b97dc1	161	err2:
d28a9689	162	clk_disable(clk);
d28a9689	163	err1:
20b97dc1 JH	164	platform_device_put(dwc3);
20b97dc1 JH	165
d28a9689 AT	166	return ret;
	167	}
	168
fb4e98ab	169	static int dwc3_exynos_remove(struct platform_device *pdev)
d28a9689 AT	170	{
d28a9689 AT	171	struct dwc3_exynos *exynos = platform_get_drvdata(pdev);
d28a9689 AT	172
d28a9689 AT	173	platform_device_unregister(exynos->dwc3);
d720f057 FB	174	platform_device_unregister(exynos->usb2_phy);
d720f057 FB	175	platform_device_unregister(exynos->usb3_phy);
d28a9689	176
d28a9689	177	clk_disable(exynos->clk);
d28a9689 AT	178
	179	return 0;
	180	}
	181
accefdd4 VG	182	#ifdef CONFIG_OF
accefdd4 VG	183	static const struct of_device_id exynos_dwc3_match[] = {
fe29db8f	184	{ .compatible = "samsung,exynos5250-dwusb3" },
accefdd4 VG	185	{},
	186	};
	187	MODULE_DEVICE_TABLE(of, exynos_dwc3_match);
	188	#endif
	189
d28a9689 AT	190	static struct platform_driver dwc3_exynos_driver = {
d28a9689 AT	191	.probe = dwc3_exynos_probe,
7690417d	192	.remove = dwc3_exynos_remove,
d28a9689 AT	193	.driver = {
d28a9689 AT	194	.name = "exynos-dwc3",
accefdd4	195	.of_match_table = of_match_ptr(exynos_dwc3_match),
d28a9689 AT	196	},
	197	};
	198
	199	module_platform_driver(dwc3_exynos_driver);
	200
	201	MODULE_ALIAS("platform:exynos-dwc3");
	202	MODULE_AUTHOR("Anton Tikhomirov <av.tikhomirov@samsung.com>");
	203	MODULE_LICENSE("GPL");
	204	MODULE_DESCRIPTION("DesignWare USB3 EXYNOS Glue Layer");