[mirror_ubuntu-artful-kernel.git] / drivers / dma / dw / pci.c

/*
 * PCI driver for the Synopsys DesignWare DMA Controller
 *
 * Copyright (C) 2013 Intel Corporation
 * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.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 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/pci.h>
#include <linux/device.h>

#include "internal.h"

static int dw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid)
{
	struct dw_dma_chip *chip;
	struct dw_dma_platform_data *pdata = (void *)pid->driver_data;
	int ret;

	ret = pcim_enable_device(pdev);
	if (ret)
		return ret;

	ret = pcim_iomap_regions(pdev, 1 << 0, pci_name(pdev));
	if (ret) {
		dev_err(&pdev->dev, "I/O memory remapping failed\n");
		return ret;
	}

	pci_set_master(pdev);
	pci_try_set_mwi(pdev);

	ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
	if (ret)
		return ret;

	ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
	if (ret)
		return ret;

	chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);
	if (!chip)
		return -ENOMEM;

	chip->dev = &pdev->dev;
	chip->regs = pcim_iomap_table(pdev)[0];
	chip->irq = pdev->irq;

	ret = dw_dma_probe(chip, pdata);
	if (ret)
		return ret;

	pci_set_drvdata(pdev, chip);

	return 0;
}

static void dw_pci_remove(struct pci_dev *pdev)
{
	struct dw_dma_chip *chip = pci_get_drvdata(pdev);
	int ret;

	ret = dw_dma_remove(chip);
	if (ret)
		dev_warn(&pdev->dev, "can't remove device properly: %d\n", ret);
}

#ifdef CONFIG_PM_SLEEP

static int dw_pci_suspend_late(struct device *dev)
{
	struct pci_dev *pci = to_pci_dev(dev);
	struct dw_dma_chip *chip = pci_get_drvdata(pci);

	return dw_dma_disable(chip);
};

static int dw_pci_resume_early(struct device *dev)
{
	struct pci_dev *pci = to_pci_dev(dev);
	struct dw_dma_chip *chip = pci_get_drvdata(pci);

	return dw_dma_enable(chip);
};

#endif /* CONFIG_PM_SLEEP */

static const struct dev_pm_ops dw_pci_dev_pm_ops = {
	SET_LATE_SYSTEM_SLEEP_PM_OPS(dw_pci_suspend_late, dw_pci_resume_early)
};

static const struct pci_device_id dw_pci_id_table[] = {
	/* Medfield */
	{ PCI_VDEVICE(INTEL, 0x0827) },
	{ PCI_VDEVICE(INTEL, 0x0830) },

	/* BayTrail */
	{ PCI_VDEVICE(INTEL, 0x0f06) },
	{ PCI_VDEVICE(INTEL, 0x0f40) },

	/* Braswell */
	{ PCI_VDEVICE(INTEL, 0x2286) },
	{ PCI_VDEVICE(INTEL, 0x22c0) },

	/* Haswell */
	{ PCI_VDEVICE(INTEL, 0x9c60) },
	{ }
};
MODULE_DEVICE_TABLE(pci, dw_pci_id_table);

static struct pci_driver dw_pci_driver = {
	.name		= "dw_dmac_pci",
	.id_table	= dw_pci_id_table,
	.probe		= dw_pci_probe,
	.remove		= dw_pci_remove,
	.driver	= {
		.pm	= &dw_pci_dev_pm_ops,
	},
};

module_pci_driver(dw_pci_driver);

MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Synopsys DesignWare DMA Controller PCI driver");
MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
Commit	Line	Data
fed42c19 AS	1	/*
	2	* PCI driver for the Synopsys DesignWare DMA Controller
	3	*
	4	* Copyright (C) 2013 Intel Corporation
	5	* Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*/
	11
	12	#include <linux/module.h>
	13	#include <linux/pci.h>
	14	#include <linux/device.h>
	15
	16	#include "internal.h"
	17
fed42c19 AS	18	static int dw_pci_probe(struct pci_dev pdev, const struct pci_device_id pid)
	19	{
	20	struct dw_dma_chip *chip;
	21	struct dw_dma_platform_data pdata = (void )pid->driver_data;
	22	int ret;
	23
	24	ret = pcim_enable_device(pdev);
	25	if (ret)
	26	return ret;
	27
	28	ret = pcim_iomap_regions(pdev, 1 << 0, pci_name(pdev));
	29	if (ret) {
	30	dev_err(&pdev->dev, "I/O memory remapping failed\n");
	31	return ret;
	32	}
	33
	34	pci_set_master(pdev);
	35	pci_try_set_mwi(pdev);
	36
	37	ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
	38	if (ret)
	39	return ret;
	40
	41	ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
	42	if (ret)
	43	return ret;
	44
	45	chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);
	46	if (!chip)
	47	return -ENOMEM;
	48
	49	chip->dev = &pdev->dev;
	50	chip->regs = pcim_iomap_table(pdev)[0];
	51	chip->irq = pdev->irq;
	52
	53	ret = dw_dma_probe(chip, pdata);
	54	if (ret)
	55	return ret;
	56
	57	pci_set_drvdata(pdev, chip);
	58
	59	return 0;
	60	}
	61
	62	static void dw_pci_remove(struct pci_dev *pdev)
	63	{
	64	struct dw_dma_chip *chip = pci_get_drvdata(pdev);
	65	int ret;
	66
	67	ret = dw_dma_remove(chip);
	68	if (ret)
	69	dev_warn(&pdev->dev, "can't remove device properly: %d\n", ret);
	70	}
	71
4501fe61 CCE	72	#ifdef CONFIG_PM_SLEEP
	73
	74	static int dw_pci_suspend_late(struct device *dev)
	75	{
	76	struct pci_dev *pci = to_pci_dev(dev);
	77	struct dw_dma_chip *chip = pci_get_drvdata(pci);
	78
2540f74b	79	return dw_dma_disable(chip);
4501fe61 CCE	80	};
	81
	82	static int dw_pci_resume_early(struct device *dev)
	83	{
	84	struct pci_dev *pci = to_pci_dev(dev);
	85	struct dw_dma_chip *chip = pci_get_drvdata(pci);
	86
2540f74b	87	return dw_dma_enable(chip);
4501fe61 CCE	88	};
4501fe61 CCE	89
c31b6ae1	90	#endif /* CONFIG_PM_SLEEP */
4501fe61 CCE	91
4501fe61 CCE	92	static const struct dev_pm_ops dw_pci_dev_pm_ops = {
c31b6ae1	93	SET_LATE_SYSTEM_SLEEP_PM_OPS(dw_pci_suspend_late, dw_pci_resume_early)
4501fe61 CCE	94	};
4501fe61 CCE	95
7587821d	96	static const struct pci_device_id dw_pci_id_table[] = {
fed42c19	97	/* Medfield */
6dbd80a9 AS	98	{ PCI_VDEVICE(INTEL, 0x0827) },
6dbd80a9 AS	99	{ PCI_VDEVICE(INTEL, 0x0830) },
fed42c19 AS	100
fed42c19 AS	101	/* BayTrail */
6dbd80a9 AS	102	{ PCI_VDEVICE(INTEL, 0x0f06) },
6dbd80a9 AS	103	{ PCI_VDEVICE(INTEL, 0x0f40) },
24066813	104
b279c492	105	/* Braswell */
6dbd80a9 AS	106	{ PCI_VDEVICE(INTEL, 0x2286) },
6dbd80a9 AS	107	{ PCI_VDEVICE(INTEL, 0x22c0) },
b279c492	108
24066813	109	/* Haswell */
6dbd80a9	110	{ PCI_VDEVICE(INTEL, 0x9c60) },
fed42c19 AS	111	{ }
	112	};
	113	MODULE_DEVICE_TABLE(pci, dw_pci_id_table);
	114
	115	static struct pci_driver dw_pci_driver = {
	116	.name = "dw_dmac_pci",
	117	.id_table = dw_pci_id_table,
	118	.probe = dw_pci_probe,
	119	.remove = dw_pci_remove,
4501fe61 CCE	120	.driver = {
	121	.pm = &dw_pci_dev_pm_ops,
	122	},
fed42c19 AS	123	};
	124
	125	module_pci_driver(dw_pci_driver);
	126
	127	MODULE_LICENSE("GPL v2");
	128	MODULE_DESCRIPTION("Synopsys DesignWare DMA Controller PCI driver");
	129	MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");