[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>

#include "core.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 __devinit 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", 0);
	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", 1);
	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 __devinit dwc3_exynos_probe(struct platform_device *pdev)
{
	struct platform_device	*dwc3;
	struct dwc3_exynos	*exynos;
	struct clk		*clk;

	int			ret = -ENOMEM;

	exynos = kzalloc(sizeof(*exynos), GFP_KERNEL);
	if (!exynos) {
		dev_err(&pdev->dev, "not enough memory\n");
		goto err0;
	}

	/*
	 * 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(&pdev->dev, "couldn't register PHYs\n");
		goto err1;
	}

	dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
	if (!dwc3) {
		dev_err(&pdev->dev, "couldn't allocate dwc3 device\n");
		goto err1;
	}

	clk = clk_get(&pdev->dev, "usbdrd30");
	if (IS_ERR(clk)) {
		dev_err(&pdev->dev, "couldn't get clock\n");
		ret = -EINVAL;
		goto err3;
	}

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

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

	clk_enable(exynos->clk);

	ret = platform_device_add_resources(dwc3, pdev->resource,
			pdev->num_resources);
	if (ret) {
		dev_err(&pdev->dev, "couldn't add resources to dwc3 device\n");
		goto err4;
	}

	ret = platform_device_add(dwc3);
	if (ret) {
		dev_err(&pdev->dev, "failed to register dwc3 device\n");
		goto err4;
	}

	return 0;

err4:
	clk_disable(clk);
	clk_put(clk);
err3:
	platform_device_put(dwc3);
err1:
	kfree(exynos);
err0:
	return ret;
}

static int __devexit 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);
	clk_put(exynos->clk);

	kfree(exynos);

	return 0;
}

#ifdef CONFIG_OF
static const struct of_device_id exynos_dwc3_match[] = {
	{ .compatible = "samsung,exynos-dwc3" },
	{},
};
MODULE_DEVICE_TABLE(of, exynos_dwc3_match);
#endif

static struct platform_driver dwc3_exynos_driver = {
	.probe		= dwc3_exynos_probe,
	.remove		= __devexit_p(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 AT	25
	26	#include "core.h"
	27
	28	struct dwc3_exynos {
	29	struct platform_device *dwc3;
d720f057 FB	30	struct platform_device *usb2_phy;
d720f057 FB	31	struct platform_device *usb3_phy;
d28a9689 AT	32	struct device *dev;
	33
	34	struct clk *clk;
	35	};
	36
d720f057 FB	37	static int __devinit dwc3_exynos_register_phys(struct dwc3_exynos *exynos)
	38	{
	39	struct nop_usb_xceiv_platform_data pdata;
	40	struct platform_device *pdev;
	41	int ret;
	42
	43	memset(&pdata, 0x00, sizeof(pdata));
	44
	45	pdev = platform_device_alloc("nop_usb_xceiv", 0);
	46	if (!pdev)
	47	return -ENOMEM;
	48
	49	exynos->usb2_phy = pdev;
	50	pdata.type = USB_PHY_TYPE_USB2;
	51
	52	ret = platform_device_add_data(exynos->usb2_phy, &pdata, sizeof(pdata));
	53	if (ret)
	54	goto err1;
	55
	56	pdev = platform_device_alloc("nop_usb_xceiv", 1);
	57	if (!pdev) {
	58	ret = -ENOMEM;
	59	goto err1;
	60	}
	61
	62	exynos->usb3_phy = pdev;
	63	pdata.type = USB_PHY_TYPE_USB3;
	64
	65	ret = platform_device_add_data(exynos->usb3_phy, &pdata, sizeof(pdata));
	66	if (ret)
	67	goto err2;
	68
	69	ret = platform_device_add(exynos->usb2_phy);
	70	if (ret)
	71	goto err2;
	72
	73	ret = platform_device_add(exynos->usb3_phy);
	74	if (ret)
	75	goto err3;
	76
	77	return 0;
	78
	79	err3:
	80	platform_device_del(exynos->usb2_phy);
	81
	82	err2:
	83	platform_device_put(exynos->usb3_phy);
	84
	85	err1:
	86	platform_device_put(exynos->usb2_phy);
	87
	88	return ret;
	89	}
	90
accefdd4 VG	91	static u64 dwc3_exynos_dma_mask = DMA_BIT_MASK(32);
accefdd4 VG	92
d28a9689 AT	93	static int __devinit dwc3_exynos_probe(struct platform_device *pdev)
d28a9689 AT	94	{
d28a9689 AT	95	struct platform_device *dwc3;
	96	struct dwc3_exynos *exynos;
	97	struct clk *clk;
	98
d28a9689 AT	99	int ret = -ENOMEM;
	100
	101	exynos = kzalloc(sizeof(*exynos), GFP_KERNEL);
	102	if (!exynos) {
	103	dev_err(&pdev->dev, "not enough memory\n");
	104	goto err0;
	105	}
	106
accefdd4 VG	107	/*
	108	* Right now device-tree probed devices don't get dma_mask set.
	109	* Since shared usb code relies on it, set it here for now.
	110	* Once we move to full device tree support this will vanish off.
	111	*/
	112	if (!pdev->dev.dma_mask)
	113	pdev->dev.dma_mask = &dwc3_exynos_dma_mask;
	114
d28a9689 AT	115	platform_set_drvdata(pdev, exynos);
d28a9689 AT	116
d720f057 FB	117	ret = dwc3_exynos_register_phys(exynos);
	118	if (ret) {
	119	dev_err(&pdev->dev, "couldn't register PHYs\n");
	120	goto err1;
	121	}
	122
124dafde	123	dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
d28a9689 AT	124	if (!dwc3) {
d28a9689 AT	125	dev_err(&pdev->dev, "couldn't allocate dwc3 device\n");
124dafde	126	goto err1;
d28a9689 AT	127	}
	128
	129	clk = clk_get(&pdev->dev, "usbdrd30");
	130	if (IS_ERR(clk)) {
	131	dev_err(&pdev->dev, "couldn't get clock\n");
	132	ret = -EINVAL;
	133	goto err3;
	134	}
	135
	136	dma_set_coherent_mask(&dwc3->dev, pdev->dev.coherent_dma_mask);
	137
	138	dwc3->dev.parent = &pdev->dev;
	139	dwc3->dev.dma_mask = pdev->dev.dma_mask;
	140	dwc3->dev.dma_parms = pdev->dev.dma_parms;
	141	exynos->dwc3 = dwc3;
	142	exynos->dev = &pdev->dev;
	143	exynos->clk = clk;
	144
	145	clk_enable(exynos->clk);
	146
d28a9689 AT	147	ret = platform_device_add_resources(dwc3, pdev->resource,
	148	pdev->num_resources);
	149	if (ret) {
	150	dev_err(&pdev->dev, "couldn't add resources to dwc3 device\n");
	151	goto err4;
	152	}
	153
	154	ret = platform_device_add(dwc3);
	155	if (ret) {
	156	dev_err(&pdev->dev, "failed to register dwc3 device\n");
	157	goto err4;
	158	}
	159
	160	return 0;
	161
	162	err4:
d28a9689 AT	163	clk_disable(clk);
	164	clk_put(clk);
	165	err3:
	166	platform_device_put(dwc3);
d28a9689 AT	167	err1:
	168	kfree(exynos);
	169	err0:
	170	return ret;
	171	}
	172
	173	static int __devexit dwc3_exynos_remove(struct platform_device *pdev)
	174	{
	175	struct dwc3_exynos *exynos = platform_get_drvdata(pdev);
d28a9689 AT	176
d28a9689 AT	177	platform_device_unregister(exynos->dwc3);
d720f057 FB	178	platform_device_unregister(exynos->usb2_phy);
d720f057 FB	179	platform_device_unregister(exynos->usb3_phy);
d28a9689	180
d28a9689 AT	181	clk_disable(exynos->clk);
	182	clk_put(exynos->clk);
	183
	184	kfree(exynos);
	185
	186	return 0;
	187	}
	188
accefdd4 VG	189	#ifdef CONFIG_OF
	190	static const struct of_device_id exynos_dwc3_match[] = {
	191	{ .compatible = "samsung,exynos-dwc3" },
	192	{},
	193	};
	194	MODULE_DEVICE_TABLE(of, exynos_dwc3_match);
	195	#endif
	196
d28a9689 AT	197	static struct platform_driver dwc3_exynos_driver = {
	198	.probe = dwc3_exynos_probe,
	199	.remove = __devexit_p(dwc3_exynos_remove),
	200	.driver = {
	201	.name = "exynos-dwc3",
accefdd4	202	.of_match_table = of_match_ptr(exynos_dwc3_match),
d28a9689 AT	203	},
	204	};
	205
	206	module_platform_driver(dwc3_exynos_driver);
	207
	208	MODULE_ALIAS("platform:exynos-dwc3");
	209	MODULE_AUTHOR("Anton Tikhomirov <av.tikhomirov@samsung.com>");
	210	MODULE_LICENSE("GPL");
	211	MODULE_DESCRIPTION("DesignWare USB3 EXYNOS Glue Layer");