[deliverable/linux.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 struct dw_dma_platform_data dw_pci_pdata = {
	.is_private = 1,
	.chan_allocation_order = CHAN_ALLOCATION_ASCENDING,
	.chan_priority = CHAN_PRIORITY_ASCENDING,
};

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_suspend(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_resume(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), (kernel_ulong_t)&dw_pci_pdata },
	{ PCI_VDEVICE(INTEL, 0x0830), (kernel_ulong_t)&dw_pci_pdata },

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

	/* Haswell */
	{ PCI_VDEVICE(INTEL, 0x9c60), (kernel_ulong_t)&dw_pci_pdata },
	{ }
};
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
	18	static struct dw_dma_platform_data dw_pci_pdata = {
	19	.is_private = 1,
	20	.chan_allocation_order = CHAN_ALLOCATION_ASCENDING,
	21	.chan_priority = CHAN_PRIORITY_ASCENDING,
	22	};
	23
	24	static int dw_pci_probe(struct pci_dev pdev, const struct pci_device_id pid)
	25	{
	26	struct dw_dma_chip *chip;
	27	struct dw_dma_platform_data pdata = (void )pid->driver_data;
	28	int ret;
	29
	30	ret = pcim_enable_device(pdev);
	31	if (ret)
	32	return ret;
	33
	34	ret = pcim_iomap_regions(pdev, 1 << 0, pci_name(pdev));
	35	if (ret) {
	36	dev_err(&pdev->dev, "I/O memory remapping failed\n");
	37	return ret;
	38	}
	39
	40	pci_set_master(pdev);
	41	pci_try_set_mwi(pdev);
	42
	43	ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
	44	if (ret)
	45	return ret;
	46
	47	ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
	48	if (ret)
	49	return ret;
	50
	51	chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);
	52	if (!chip)
	53	return -ENOMEM;
	54
	55	chip->dev = &pdev->dev;
	56	chip->regs = pcim_iomap_table(pdev)[0];
	57	chip->irq = pdev->irq;
	58
	59	ret = dw_dma_probe(chip, pdata);
	60	if (ret)
	61	return ret;
	62
	63	pci_set_drvdata(pdev, chip);
	64
65	return 0;
66	}
67
68	static void dw_pci_remove(struct pci_dev *pdev)
69	{
70	struct dw_dma_chip *chip = pci_get_drvdata(pdev);
71	int ret;
72
73	ret = dw_dma_remove(chip);
74	if (ret)
75	dev_warn(&pdev->dev, "can't remove device properly: %d\n", ret);
76	}
77
4501fe61 CCE	78	#ifdef CONFIG_PM_SLEEP
	79
	80	static int dw_pci_suspend_late(struct device *dev)
	81	{
	82	struct pci_dev *pci = to_pci_dev(dev);
	83	struct dw_dma_chip *chip = pci_get_drvdata(pci);
	84
	85	return dw_dma_suspend(chip);
	86	};
	87
	88	static int dw_pci_resume_early(struct device *dev)
	89	{
	90	struct pci_dev *pci = to_pci_dev(dev);
	91	struct dw_dma_chip *chip = pci_get_drvdata(pci);
	92
	93	return dw_dma_resume(chip);
	94	};
	95
c31b6ae1	96	#endif /* CONFIG_PM_SLEEP */
4501fe61 CCE	97
4501fe61 CCE	98	static const struct dev_pm_ops dw_pci_dev_pm_ops = {
c31b6ae1	99	SET_LATE_SYSTEM_SLEEP_PM_OPS(dw_pci_suspend_late, dw_pci_resume_early)
4501fe61 CCE	100	};
4501fe61 CCE	101
7587821d	102	static const struct pci_device_id dw_pci_id_table[] = {
fed42c19 AS	103	/* Medfield */
	104	{ PCI_VDEVICE(INTEL, 0x0827), (kernel_ulong_t)&dw_pci_pdata },
	105	{ PCI_VDEVICE(INTEL, 0x0830), (kernel_ulong_t)&dw_pci_pdata },
	106
	107	/* BayTrail */
	108	{ PCI_VDEVICE(INTEL, 0x0f06), (kernel_ulong_t)&dw_pci_pdata },
	109	{ PCI_VDEVICE(INTEL, 0x0f40), (kernel_ulong_t)&dw_pci_pdata },
24066813 AS	110
	111	/* Haswell */
	112	{ PCI_VDEVICE(INTEL, 0x9c60), (kernel_ulong_t)&dw_pci_pdata },
fed42c19 AS	113	{ }
	114	};
	115	MODULE_DEVICE_TABLE(pci, dw_pci_id_table);
	116
	117	static struct pci_driver dw_pci_driver = {
	118	.name = "dw_dmac_pci",
	119	.id_table = dw_pci_id_table,
	120	.probe = dw_pci_probe,
	121	.remove = dw_pci_remove,
4501fe61 CCE	122	.driver = {
	123	.pm = &dw_pci_dev_pm_ops,
	124	},
fed42c19 AS	125	};
	126
	127	module_pci_driver(dw_pci_driver);
	128
	129	MODULE_LICENSE("GPL v2");
	130	MODULE_DESCRIPTION("Synopsys DesignWare DMA Controller PCI driver");
	131	MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");