[people/ms/u-boot.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 version 2  of
 * the License as published by the Free Software Foundation.
 *
 * 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.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/clk.h>
#include <linux/usb/otg.h>
#include <linux/usb/usb_phy_generic.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/regulator/consumer.h>

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

	struct clk		*clk;
	struct clk		*susp_clk;
	struct clk		*axius_clk;

	struct regulator	*vdd33;
	struct regulator	*vdd10;
};

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

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

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

	exynos->usb2_phy = pdev;
	pdata.type = USB_PHY_TYPE_USB2;
	pdata.gpio_reset = -1;

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

	pdev = platform_device_alloc("usb_phy_generic", 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 int dwc3_exynos_remove_child(struct device *dev, void *unused)
{
	struct platform_device *pdev = to_platform_device(dev);

	platform_device_unregister(pdev);

	return 0;
}

static int dwc3_exynos_probe(struct platform_device *pdev)
{
	struct dwc3_exynos	*exynos;
	struct device		*dev = &pdev->dev;
	struct device_node	*node = dev->of_node;

	int			ret;

	exynos = devm_kzalloc(dev, sizeof(*exynos), GFP_KERNEL);
	if (!exynos)
		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.
	 */
	ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32));
	if (ret)
		return ret;

	platform_set_drvdata(pdev, exynos);

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

	exynos->dev	= dev;

	exynos->clk = devm_clk_get(dev, "usbdrd30");
	if (IS_ERR(exynos->clk)) {
		dev_err(dev, "couldn't get clock\n");
		return -EINVAL;
	}
	clk_prepare_enable(exynos->clk);

	exynos->susp_clk = devm_clk_get(dev, "usbdrd30_susp_clk");
	if (IS_ERR(exynos->susp_clk)) {
		dev_dbg(dev, "no suspend clk specified\n");
		exynos->susp_clk = NULL;
	}
	clk_prepare_enable(exynos->susp_clk);

	if (of_device_is_compatible(node, "samsung,exynos7-dwusb3")) {
		exynos->axius_clk = devm_clk_get(dev, "usbdrd30_axius_clk");
		if (IS_ERR(exynos->axius_clk)) {
			dev_err(dev, "no AXI UpScaler clk specified\n");
			return -ENODEV;
		}
		clk_prepare_enable(exynos->axius_clk);
	} else {
		exynos->axius_clk = NULL;
	}

	exynos->vdd33 = devm_regulator_get(dev, "vdd33");
	if (IS_ERR(exynos->vdd33)) {
		ret = PTR_ERR(exynos->vdd33);
		goto err2;
	}
	ret = regulator_enable(exynos->vdd33);
	if (ret) {
		dev_err(dev, "Failed to enable VDD33 supply\n");
		goto err2;
	}

	exynos->vdd10 = devm_regulator_get(dev, "vdd10");
	if (IS_ERR(exynos->vdd10)) {
		ret = PTR_ERR(exynos->vdd10);
		goto err3;
	}
	ret = regulator_enable(exynos->vdd10);
	if (ret) {
		dev_err(dev, "Failed to enable VDD10 supply\n");
		goto err3;
	}

	if (node) {
		ret = of_platform_populate(node, NULL, NULL, dev);
		if (ret) {
			dev_err(dev, "failed to add dwc3 core\n");
			goto err4;
		}
	} else {
		dev_err(dev, "no device node, failed to add dwc3 core\n");
		ret = -ENODEV;
		goto err4;
	}

	return 0;

err4:
	regulator_disable(exynos->vdd10);
err3:
	regulator_disable(exynos->vdd33);
err2:
	clk_disable_unprepare(exynos->axius_clk);
	clk_disable_unprepare(exynos->susp_clk);
	clk_disable_unprepare(exynos->clk);
	return ret;
}

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

	device_for_each_child(&pdev->dev, NULL, dwc3_exynos_remove_child);
	platform_device_unregister(exynos->usb2_phy);
	platform_device_unregister(exynos->usb3_phy);

	clk_disable_unprepare(exynos->axius_clk);
	clk_disable_unprepare(exynos->susp_clk);
	clk_disable_unprepare(exynos->clk);

	regulator_disable(exynos->vdd33);
	regulator_disable(exynos->vdd10);

	return 0;
}

static const struct of_device_id exynos_dwc3_match[] = {
	{ .compatible = "samsung,exynos5250-dwusb3" },
	{ .compatible = "samsung,exynos7-dwusb3" },
	{},
};
MODULE_DEVICE_TABLE(of, exynos_dwc3_match);

#ifdef CONFIG_PM_SLEEP
static int dwc3_exynos_suspend(struct device *dev)
{
	struct dwc3_exynos *exynos = dev_get_drvdata(dev);

	clk_disable(exynos->axius_clk);
	clk_disable(exynos->clk);

	regulator_disable(exynos->vdd33);
	regulator_disable(exynos->vdd10);

	return 0;
}

static int dwc3_exynos_resume(struct device *dev)
{
	struct dwc3_exynos *exynos = dev_get_drvdata(dev);
	int ret;

	ret = regulator_enable(exynos->vdd33);
	if (ret) {
		dev_err(dev, "Failed to enable VDD33 supply\n");
		return ret;
	}
	ret = regulator_enable(exynos->vdd10);
	if (ret) {
		dev_err(dev, "Failed to enable VDD10 supply\n");
		return ret;
	}

	clk_enable(exynos->clk);
	clk_enable(exynos->axius_clk);

	/* runtime set active to reflect active state. */
	pm_runtime_disable(dev);
	pm_runtime_set_active(dev);
	pm_runtime_enable(dev);

	return 0;
}

static const struct dev_pm_ops dwc3_exynos_dev_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(dwc3_exynos_suspend, dwc3_exynos_resume)
};

#define DEV_PM_OPS	(&dwc3_exynos_dev_pm_ops)
#else
#define DEV_PM_OPS	NULL
#endif /* CONFIG_PM_SLEEP */

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

module_platform_driver(dwc3_exynos_driver);

MODULE_ALIAS("platform:exynos-dwc3");
MODULE_AUTHOR("Anton Tikhomirov <av.tikhomirov@samsung.com>");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("DesignWare USB3 EXYNOS Glue Layer");
Commit	Line	Data
85d5e707 KVA	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 version 2 of
	11	* the License as published by the Free Software Foundation.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*/
	18
	19	#include <linux/module.h>
	20	#include <linux/kernel.h>
	21	#include <linux/slab.h>
	22	#include <linux/platform_device.h>
	23	#include <linux/dma-mapping.h>
	24	#include <linux/clk.h>
	25	#include <linux/usb/otg.h>
	26	#include <linux/usb/usb_phy_generic.h>
	27	#include <linux/of.h>
	28	#include <linux/of_platform.h>
	29	#include <linux/regulator/consumer.h>
	30
	31	struct dwc3_exynos {
	32	struct platform_device *usb2_phy;
	33	struct platform_device *usb3_phy;
	34	struct device *dev;
	35
	36	struct clk *clk;
	37	struct clk *susp_clk;
	38	struct clk *axius_clk;
	39
	40	struct regulator *vdd33;
	41	struct regulator *vdd10;
	42	};
	43
	44	static int dwc3_exynos_register_phys(struct dwc3_exynos *exynos)
	45	{
	46	struct usb_phy_generic_platform_data pdata;
	47	struct platform_device *pdev;
	48	int ret;
	49
	50	memset(&pdata, 0x00, sizeof(pdata));
	51
	52	pdev = platform_device_alloc("usb_phy_generic", PLATFORM_DEVID_AUTO);
	53	if (!pdev)
	54	return -ENOMEM;
	55
	56	exynos->usb2_phy = pdev;
	57	pdata.type = USB_PHY_TYPE_USB2;
	58	pdata.gpio_reset = -1;
	59
	60	ret = platform_device_add_data(exynos->usb2_phy, &pdata, sizeof(pdata));
	61	if (ret)
	62	goto err1;
	63
	64	pdev = platform_device_alloc("usb_phy_generic", PLATFORM_DEVID_AUTO);
65	if (!pdev) {
66	ret = -ENOMEM;
67	goto err1;
68	}
69
70	exynos->usb3_phy = pdev;
71	pdata.type = USB_PHY_TYPE_USB3;
72
73	ret = platform_device_add_data(exynos->usb3_phy, &pdata, sizeof(pdata));
74	if (ret)
75	goto err2;
76
77	ret = platform_device_add(exynos->usb2_phy);
78	if (ret)
79	goto err2;
80
81	ret = platform_device_add(exynos->usb3_phy);
82	if (ret)
83	goto err3;
84
85	return 0;
86
87	err3:
88	platform_device_del(exynos->usb2_phy);
89
90	err2:
91	platform_device_put(exynos->usb3_phy);
92
93	err1:
94	platform_device_put(exynos->usb2_phy);
95
96	return ret;
97	}
98
99	static int dwc3_exynos_remove_child(struct device dev, void unused)
100	{
101	struct platform_device *pdev = to_platform_device(dev);
102
103	platform_device_unregister(pdev);
104
105	return 0;
106	}
107
108	static int dwc3_exynos_probe(struct platform_device *pdev)
109	{
110	struct dwc3_exynos *exynos;
111	struct device *dev = &pdev->dev;
112	struct device_node *node = dev->of_node;
113
114	int ret;
115
116	exynos = devm_kzalloc(dev, sizeof(*exynos), GFP_KERNEL);
117	if (!exynos)
118	return -ENOMEM;
119
120	/*
121	* Right now device-tree probed devices don't get dma_mask set.
122	* Since shared usb code relies on it, set it here for now.
123	* Once we move to full device tree support this will vanish off.
124	*/
125	ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32));
126	if (ret)
127	return ret;
128
129	platform_set_drvdata(pdev, exynos);
130
131	ret = dwc3_exynos_register_phys(exynos);
132	if (ret) {
133	dev_err(dev, "couldn't register PHYs\n");
134	return ret;
135	}
136
137	exynos->dev = dev;
138
139	exynos->clk = devm_clk_get(dev, "usbdrd30");
140	if (IS_ERR(exynos->clk)) {
141	dev_err(dev, "couldn't get clock\n");
142	return -EINVAL;
143	}
144	clk_prepare_enable(exynos->clk);
145
146	exynos->susp_clk = devm_clk_get(dev, "usbdrd30_susp_clk");
147	if (IS_ERR(exynos->susp_clk)) {
148	dev_dbg(dev, "no suspend clk specified\n");
149	exynos->susp_clk = NULL;
150	}
151	clk_prepare_enable(exynos->susp_clk);
152
153	if (of_device_is_compatible(node, "samsung,exynos7-dwusb3")) {
154	exynos->axius_clk = devm_clk_get(dev, "usbdrd30_axius_clk");
155	if (IS_ERR(exynos->axius_clk)) {
156	dev_err(dev, "no AXI UpScaler clk specified\n");
157	return -ENODEV;
158	}
159	clk_prepare_enable(exynos->axius_clk);
160	} else {
161	exynos->axius_clk = NULL;
162	}
163
164	exynos->vdd33 = devm_regulator_get(dev, "vdd33");
165	if (IS_ERR(exynos->vdd33)) {
166	ret = PTR_ERR(exynos->vdd33);
167	goto err2;
168	}
169	ret = regulator_enable(exynos->vdd33);
170	if (ret) {
171	dev_err(dev, "Failed to enable VDD33 supply\n");
172	goto err2;
173	}
174
175	exynos->vdd10 = devm_regulator_get(dev, "vdd10");
176	if (IS_ERR(exynos->vdd10)) {
177	ret = PTR_ERR(exynos->vdd10);
178	goto err3;
179	}
180	ret = regulator_enable(exynos->vdd10);
181	if (ret) {
182	dev_err(dev, "Failed to enable VDD10 supply\n");
183	goto err3;
184	}
185
186	if (node) {
187	ret = of_platform_populate(node, NULL, NULL, dev);
188	if (ret) {
189	dev_err(dev, "failed to add dwc3 core\n");
190	goto err4;
191	}
192	} else {
193	dev_err(dev, "no device node, failed to add dwc3 core\n");
194	ret = -ENODEV;
195	goto err4;
196	}
197
198	return 0;
199
200	err4:
201	regulator_disable(exynos->vdd10);
202	err3:
203	regulator_disable(exynos->vdd33);
204	err2:
205	clk_disable_unprepare(exynos->axius_clk);
206	clk_disable_unprepare(exynos->susp_clk);
207	clk_disable_unprepare(exynos->clk);
208	return ret;
209	}
210
211	static int dwc3_exynos_remove(struct platform_device *pdev)
212	{
213	struct dwc3_exynos *exynos = platform_get_drvdata(pdev);
214
215	device_for_each_child(&pdev->dev, NULL, dwc3_exynos_remove_child);
216	platform_device_unregister(exynos->usb2_phy);
217	platform_device_unregister(exynos->usb3_phy);
218
219	clk_disable_unprepare(exynos->axius_clk);
220	clk_disable_unprepare(exynos->susp_clk);
221	clk_disable_unprepare(exynos->clk);
222
223	regulator_disable(exynos->vdd33);
224	regulator_disable(exynos->vdd10);
225
226	return 0;
227	}
228
229	static const struct of_device_id exynos_dwc3_match[] = {
230	{ .compatible = "samsung,exynos5250-dwusb3" },
231	{ .compatible = "samsung,exynos7-dwusb3" },
232	{},
233	};
234	MODULE_DEVICE_TABLE(of, exynos_dwc3_match);
235
236	#ifdef CONFIG_PM_SLEEP
237	static int dwc3_exynos_suspend(struct device *dev)
238	{
239	struct dwc3_exynos *exynos = dev_get_drvdata(dev);
240
241	clk_disable(exynos->axius_clk);
242	clk_disable(exynos->clk);
243
244	regulator_disable(exynos->vdd33);
245	regulator_disable(exynos->vdd10);
246
247	return 0;
248	}
249
250	static int dwc3_exynos_resume(struct device *dev)
251	{
252	struct dwc3_exynos *exynos = dev_get_drvdata(dev);
253	int ret;
254
255	ret = regulator_enable(exynos->vdd33);
256	if (ret) {
257	dev_err(dev, "Failed to enable VDD33 supply\n");
258	return ret;
259	}
260	ret = regulator_enable(exynos->vdd10);
261	if (ret) {
262	dev_err(dev, "Failed to enable VDD10 supply\n");
263	return ret;
264	}
265
266	clk_enable(exynos->clk);
267	clk_enable(exynos->axius_clk);
268
269	/* runtime set active to reflect active state. */
270	pm_runtime_disable(dev);
271	pm_runtime_set_active(dev);
272	pm_runtime_enable(dev);
273
274	return 0;
275	}
276
277	static const struct dev_pm_ops dwc3_exynos_dev_pm_ops = {
278	SET_SYSTEM_SLEEP_PM_OPS(dwc3_exynos_suspend, dwc3_exynos_resume)
279	};
280
281	#define DEV_PM_OPS (&dwc3_exynos_dev_pm_ops)
282	#else
283	#define DEV_PM_OPS NULL
284	#endif /* CONFIG_PM_SLEEP */
285
286	static struct platform_driver dwc3_exynos_driver = {
287	.probe = dwc3_exynos_probe,
288	.remove = dwc3_exynos_remove,
289	.driver = {
290	.name = "exynos-dwc3",
291	.of_match_table = exynos_dwc3_match,
292	.pm = DEV_PM_OPS,
293	},
294	};
295
296	module_platform_driver(dwc3_exynos_driver);
297
298	MODULE_ALIAS("platform:exynos-dwc3");
299	MODULE_AUTHOR("Anton Tikhomirov <av.tikhomirov@samsung.com>");
300	MODULE_LICENSE("GPL v2");
301	MODULE_DESCRIPTION("DesignWare USB3 EXYNOS Glue Layer");