[deliverable/linux.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);
		*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;
		}
	}

	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
	if (ret)
		goto clk_err;

	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) {
	54	ci_pdata = devm_kmalloc(dev, sizeof(*ci_pdata), GFP_KERNEL);
	55	ci_pdata = ci_default_pdata; / struct copy */
	56	}
10a062ce	57
84bc70f9 NS	58	match = of_match_device(ci_hdrc_usb2_of_match, &pdev->dev);
	59	if (match && match->data) {
	60	/* struct copy */
	61	ci_pdata = (struct ci_hdrc_platform_data *)match->data;
	62	}
	63
10a062ce AT	64	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	65	if (!priv)
	66	return -ENOMEM;
	67
	68	priv->clk = devm_clk_get(dev, NULL);
	69	if (!IS_ERR(priv->clk)) {
	70	ret = clk_prepare_enable(priv->clk);
	71	if (ret) {
	72	dev_err(dev, "failed to enable the clock: %d\n", ret);
	73	return ret;
	74	}
	75	}
	76
	77	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
	78	if (ret)
	79	goto clk_err;
	80
	81	ci_pdata->name = dev_name(dev);
	82
	83	priv->ci_pdev = ci_hdrc_add_device(dev, pdev->resource,
	84	pdev->num_resources, ci_pdata);
	85	if (IS_ERR(priv->ci_pdev)) {
	86	ret = PTR_ERR(priv->ci_pdev);
	87	if (ret != -EPROBE_DEFER)
	88	dev_err(dev,
	89	"failed to register ci_hdrc platform device: %d\n",
	90	ret);
	91	goto clk_err;
	92	}
	93
	94	platform_set_drvdata(pdev, priv);
	95
	96	pm_runtime_no_callbacks(dev);
	97	pm_runtime_enable(dev);
	98
	99	return 0;
	100
	101	clk_err:
	102	if (!IS_ERR(priv->clk))
	103	clk_disable_unprepare(priv->clk);
	104	return ret;
	105	}
	106
	107	static int ci_hdrc_usb2_remove(struct platform_device *pdev)
	108	{
	109	struct ci_hdrc_usb2_priv *priv = platform_get_drvdata(pdev);
	110
	111	pm_runtime_disable(&pdev->dev);
	112	ci_hdrc_remove_device(priv->ci_pdev);
	113	clk_disable_unprepare(priv->clk);
	114
	115	return 0;
	116	}
	117
10a062ce AT	118	static struct platform_driver ci_hdrc_usb2_driver = {
	119	.probe = ci_hdrc_usb2_probe,
	120	.remove = ci_hdrc_usb2_remove,
	121	.driver = {
	122	.name = "chipidea-usb2",
10a062ce AT	123	.of_match_table = of_match_ptr(ci_hdrc_usb2_of_match),
	124	},
	125	};
	126	module_platform_driver(ci_hdrc_usb2_driver);
	127
	128	MODULE_DESCRIPTION("ChipIdea HDRC USB2 binding for ci13xxx");
	129	MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>");
	130	MODULE_LICENSE("GPL");