[mirror_ubuntu-bionic-kernel.git] / drivers / usb / chipidea / ci_hdrc_usb2.c

/*
 * Copyright (C) 2014 Marvell Technology Group Ltd.
 *
 * Antoine Tenart <antoine.tenart@free-electrons.com>
 *
 * This file is licensed under the terms of the GNU General Public
 * License version 2. This program is licensed "as is" without any
 * warranty of any kind, whether express or implied.
 */

#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/usb/chipidea.h>
#include <linux/usb/hcd.h>
#include <linux/usb/ulpi.h>

#include "ci.h"

struct ci_hdrc_usb2_priv {
	struct platform_device	*ci_pdev;
	struct clk		*clk;
};

static const struct ci_hdrc_platform_data ci_default_pdata = {
	.capoffset	= DEF_CAPOFFSET,
	.flags		= CI_HDRC_DISABLE_STREAMING,
};

static struct ci_hdrc_platform_data ci_zynq_pdata = {
	.capoffset	= DEF_CAPOFFSET,
};

static const struct of_device_id ci_hdrc_usb2_of_match[] = {
	{ .compatible = "chipidea,usb2"},
	{ .compatible = "xlnx,zynq-usb-2.20a", .data = &ci_zynq_pdata},
	{ }
};
MODULE_DEVICE_TABLE(of, ci_hdrc_usb2_of_match);

static int ci_hdrc_usb2_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct ci_hdrc_usb2_priv *priv;
	struct ci_hdrc_platform_data *ci_pdata = dev_get_platdata(dev);
	int ret;
	const struct of_device_id *match;

	if (!ci_pdata) {
		ci_pdata = devm_kmalloc(dev, sizeof(*ci_pdata), GFP_KERNEL);
		if (!ci_pdata)
			return -ENOMEM;
		*ci_pdata = ci_default_pdata;	/* struct copy */
	}

	match = of_match_device(ci_hdrc_usb2_of_match, &pdev->dev);
	if (match && match->data) {
		/* struct copy */
		*ci_pdata = *(struct ci_hdrc_platform_data *)match->data;
	}

	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	priv->clk = devm_clk_get(dev, NULL);
	if (!IS_ERR(priv->clk)) {
		ret = clk_prepare_enable(priv->clk);
		if (ret) {
			dev_err(dev, "failed to enable the clock: %d\n", ret);
			return ret;
		}
	}

	ci_pdata->name = dev_name(dev);

	priv->ci_pdev = ci_hdrc_add_device(dev, pdev->resource,
					   pdev->num_resources, ci_pdata);
	if (IS_ERR(priv->ci_pdev)) {
		ret = PTR_ERR(priv->ci_pdev);
		if (ret != -EPROBE_DEFER)
			dev_err(dev,
				"failed to register ci_hdrc platform device: %d\n",
				ret);
		goto clk_err;
	}

	platform_set_drvdata(pdev, priv);

	pm_runtime_no_callbacks(dev);
	pm_runtime_enable(dev);

	return 0;

clk_err:
	if (!IS_ERR(priv->clk))
		clk_disable_unprepare(priv->clk);
	return ret;
}

static int ci_hdrc_usb2_remove(struct platform_device *pdev)
{
	struct ci_hdrc_usb2_priv *priv = platform_get_drvdata(pdev);

	pm_runtime_disable(&pdev->dev);
	ci_hdrc_remove_device(priv->ci_pdev);
	clk_disable_unprepare(priv->clk);

	return 0;
}

static struct platform_driver ci_hdrc_usb2_driver = {
	.probe	= ci_hdrc_usb2_probe,
	.remove	= ci_hdrc_usb2_remove,
	.driver	= {
		.name		= "chipidea-usb2",
		.of_match_table	= of_match_ptr(ci_hdrc_usb2_of_match),
	},
};
module_platform_driver(ci_hdrc_usb2_driver);

MODULE_DESCRIPTION("ChipIdea HDRC USB2 binding for ci13xxx");
MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
10a062ce AT	1	/*
	2	* Copyright (C) 2014 Marvell Technology Group Ltd.
	3	*
	4	* Antoine Tenart <antoine.tenart@free-electrons.com>
	5	*
	6	* This file is licensed under the terms of the GNU General Public
	7	* License version 2. This program is licensed "as is" without any
	8	* warranty of any kind, whether express or implied.
	9	*/
	10
	11	#include <linux/clk.h>
	12	#include <linux/dma-mapping.h>
	13	#include <linux/module.h>
	14	#include <linux/of.h>
84bc70f9	15	#include <linux/of_platform.h>
10a062ce AT	16	#include <linux/phy/phy.h>
	17	#include <linux/platform_device.h>
	18	#include <linux/usb/chipidea.h>
	19	#include <linux/usb/hcd.h>
	20	#include <linux/usb/ulpi.h>
	21
	22	#include "ci.h"
	23
	24	struct ci_hdrc_usb2_priv {
	25	struct platform_device *ci_pdev;
	26	struct clk *clk;
	27	};
	28
d95699be	29	static const struct ci_hdrc_platform_data ci_default_pdata = {
10a062ce AT	30	.capoffset = DEF_CAPOFFSET,
	31	.flags = CI_HDRC_DISABLE_STREAMING,
	32	};
	33
84bc70f9 NS	34	static struct ci_hdrc_platform_data ci_zynq_pdata = {
	35	.capoffset = DEF_CAPOFFSET,
	36	};
	37
	38	static const struct of_device_id ci_hdrc_usb2_of_match[] = {
	39	{ .compatible = "chipidea,usb2"},
	40	{ .compatible = "xlnx,zynq-usb-2.20a", .data = &ci_zynq_pdata},
	41	{ }
	42	};
	43	MODULE_DEVICE_TABLE(of, ci_hdrc_usb2_of_match);
	44
10a062ce AT	45	static int ci_hdrc_usb2_probe(struct platform_device *pdev)
	46	{
	47	struct device *dev = &pdev->dev;
	48	struct ci_hdrc_usb2_priv *priv;
	49	struct ci_hdrc_platform_data *ci_pdata = dev_get_platdata(dev);
	50	int ret;
84bc70f9	51	const struct of_device_id *match;
10a062ce	52
d95699be RH	53	if (!ci_pdata) {
d95699be RH	54	ci_pdata = devm_kmalloc(dev, sizeof(*ci_pdata), GFP_KERNEL);
49ca2eff CJ	55	if (!ci_pdata)
49ca2eff CJ	56	return -ENOMEM;
d95699be RH	57	ci_pdata = ci_default_pdata; / struct copy */
d95699be RH	58	}
10a062ce	59
84bc70f9 NS	60	match = of_match_device(ci_hdrc_usb2_of_match, &pdev->dev);
	61	if (match && match->data) {
	62	/* struct copy */
	63	ci_pdata = (struct ci_hdrc_platform_data *)match->data;
	64	}
	65
10a062ce AT	66	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	67	if (!priv)
	68	return -ENOMEM;
	69
	70	priv->clk = devm_clk_get(dev, NULL);
	71	if (!IS_ERR(priv->clk)) {
	72	ret = clk_prepare_enable(priv->clk);
	73	if (ret) {
	74	dev_err(dev, "failed to enable the clock: %d\n", ret);
	75	return ret;
	76	}
	77	}
	78
10a062ce AT	79	ci_pdata->name = dev_name(dev);
	80
	81	priv->ci_pdev = ci_hdrc_add_device(dev, pdev->resource,
	82	pdev->num_resources, ci_pdata);
	83	if (IS_ERR(priv->ci_pdev)) {
	84	ret = PTR_ERR(priv->ci_pdev);
	85	if (ret != -EPROBE_DEFER)
	86	dev_err(dev,
	87	"failed to register ci_hdrc platform device: %d\n",
	88	ret);
	89	goto clk_err;
	90	}
	91
	92	platform_set_drvdata(pdev, priv);
	93
	94	pm_runtime_no_callbacks(dev);
	95	pm_runtime_enable(dev);
	96
	97	return 0;
	98
	99	clk_err:
	100	if (!IS_ERR(priv->clk))
	101	clk_disable_unprepare(priv->clk);
	102	return ret;
	103	}
	104
	105	static int ci_hdrc_usb2_remove(struct platform_device *pdev)
	106	{
	107	struct ci_hdrc_usb2_priv *priv = platform_get_drvdata(pdev);
	108
	109	pm_runtime_disable(&pdev->dev);
	110	ci_hdrc_remove_device(priv->ci_pdev);
	111	clk_disable_unprepare(priv->clk);
	112
	113	return 0;
	114	}
	115
10a062ce AT	116	static struct platform_driver ci_hdrc_usb2_driver = {
	117	.probe = ci_hdrc_usb2_probe,
	118	.remove = ci_hdrc_usb2_remove,
	119	.driver = {
	120	.name = "chipidea-usb2",
10a062ce AT	121	.of_match_table = of_match_ptr(ci_hdrc_usb2_of_match),
	122	},
	123	};
	124	module_platform_driver(ci_hdrc_usb2_driver);
	125
	126	MODULE_DESCRIPTION("ChipIdea HDRC USB2 binding for ci13xxx");
	127	MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>");
	128	MODULE_LICENSE("GPL");