[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 struct dw_dma_platform_data mrfld_pdata = {
	.nr_channels = 8,
	.is_private = true,
	.is_memcpy = true,
	.is_idma32 = true,
	.chan_allocation_order = CHAN_ALLOCATION_ASCENDING,
	.chan_priority = CHAN_PRIORITY_ASCENDING,
	.block_size = 131071,
	.nr_masters = 1,
	.data_width = {4},
};

static int dw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid)
{
	const struct dw_dma_platform_data *pdata = (void *)pid->driver_data;
	struct dw_dma_chip *chip;
	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->id = pdev->devfn;
	chip->regs = pcim_iomap_table(pdev)[0];
	chip->irq = pdev->irq;
	chip->pdata = pdata;

	ret = dw_dma_probe(chip);
	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 (GPDMA) */
	{ PCI_VDEVICE(INTEL, 0x0827) },

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

	/* Merrifield iDMA 32-bit (GPDMA) */
	{ PCI_VDEVICE(INTEL, 0x11a2), (kernel_ulong_t)&mrfld_pdata },

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

	/* Haswell */
	{ PCI_VDEVICE(INTEL, 0x9c60) },

	/* Broadwell */
	{ PCI_VDEVICE(INTEL, 0x9ce0) },

	{ }
};
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
f7c799e9 AS	18	static struct dw_dma_platform_data mrfld_pdata = {
	19	.nr_channels = 8,
	20	.is_private = true,
	21	.is_memcpy = true,
	22	.is_idma32 = true,
	23	.chan_allocation_order = CHAN_ALLOCATION_ASCENDING,
	24	.chan_priority = CHAN_PRIORITY_ASCENDING,
	25	.block_size = 131071,
	26	.nr_masters = 1,
	27	.data_width = {4},
	28	};
	29
fed42c19 AS	30	static int dw_pci_probe(struct pci_dev pdev, const struct pci_device_id pid)
fed42c19 AS	31	{
3a14c66d	32	const struct dw_dma_platform_data pdata = (void )pid->driver_data;
fed42c19	33	struct dw_dma_chip *chip;
fed42c19 AS	34	int ret;
	35
	36	ret = pcim_enable_device(pdev);
	37	if (ret)
	38	return ret;
	39
	40	ret = pcim_iomap_regions(pdev, 1 << 0, pci_name(pdev));
	41	if (ret) {
	42	dev_err(&pdev->dev, "I/O memory remapping failed\n");
	43	return ret;
	44	}
	45
	46	pci_set_master(pdev);
	47	pci_try_set_mwi(pdev);
	48
	49	ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
	50	if (ret)
	51	return ret;
	52
	53	ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
	54	if (ret)
	55	return ret;
	56
	57	chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);
	58	if (!chip)
	59	return -ENOMEM;
	60
	61	chip->dev = &pdev->dev;
08d62f58	62	chip->id = pdev->devfn;
fed42c19 AS	63	chip->regs = pcim_iomap_table(pdev)[0];
fed42c19 AS	64	chip->irq = pdev->irq;
3a14c66d	65	chip->pdata = pdata;
fed42c19	66
3a14c66d	67	ret = dw_dma_probe(chip);
fed42c19 AS	68	if (ret)
	69	return ret;
	70
	71	pci_set_drvdata(pdev, chip);
	72
	73	return 0;
	74	}
	75
	76	static void dw_pci_remove(struct pci_dev *pdev)
	77	{
	78	struct dw_dma_chip *chip = pci_get_drvdata(pdev);
	79	int ret;
	80
	81	ret = dw_dma_remove(chip);
	82	if (ret)
	83	dev_warn(&pdev->dev, "can't remove device properly: %d\n", ret);
	84	}
	85
4501fe61 CCE	86	#ifdef CONFIG_PM_SLEEP
	87
	88	static int dw_pci_suspend_late(struct device *dev)
	89	{
	90	struct pci_dev *pci = to_pci_dev(dev);
	91	struct dw_dma_chip *chip = pci_get_drvdata(pci);
	92
2540f74b	93	return dw_dma_disable(chip);
4501fe61 CCE	94	};
	95
	96	static int dw_pci_resume_early(struct device *dev)
	97	{
	98	struct pci_dev *pci = to_pci_dev(dev);
	99	struct dw_dma_chip *chip = pci_get_drvdata(pci);
	100
2540f74b	101	return dw_dma_enable(chip);
4501fe61 CCE	102	};
4501fe61 CCE	103
c31b6ae1	104	#endif /* CONFIG_PM_SLEEP */
4501fe61 CCE	105
4501fe61 CCE	106	static const struct dev_pm_ops dw_pci_dev_pm_ops = {
c31b6ae1	107	SET_LATE_SYSTEM_SLEEP_PM_OPS(dw_pci_suspend_late, dw_pci_resume_early)
4501fe61 CCE	108	};
4501fe61 CCE	109
7587821d	110	static const struct pci_device_id dw_pci_id_table[] = {
ebb7fe21	111	/* Medfield (GPDMA) */
6dbd80a9	112	{ PCI_VDEVICE(INTEL, 0x0827) },
fed42c19 AS	113
fed42c19 AS	114	/* BayTrail */
6dbd80a9 AS	115	{ PCI_VDEVICE(INTEL, 0x0f06) },
6dbd80a9 AS	116	{ PCI_VDEVICE(INTEL, 0x0f40) },
24066813	117
f7c799e9 AS	118	/* Merrifield iDMA 32-bit (GPDMA) */
	119	{ PCI_VDEVICE(INTEL, 0x11a2), (kernel_ulong_t)&mrfld_pdata },
	120
b279c492	121	/* Braswell */
6dbd80a9 AS	122	{ PCI_VDEVICE(INTEL, 0x2286) },
6dbd80a9 AS	123	{ PCI_VDEVICE(INTEL, 0x22c0) },
b279c492	124
24066813	125	/* Haswell */
6dbd80a9	126	{ PCI_VDEVICE(INTEL, 0x9c60) },
3efaf2a9 AS	127
	128	/* Broadwell */
	129	{ PCI_VDEVICE(INTEL, 0x9ce0) },
	130
fed42c19 AS	131	{ }
	132	};
	133	MODULE_DEVICE_TABLE(pci, dw_pci_id_table);
	134
	135	static struct pci_driver dw_pci_driver = {
	136	.name = "dw_dmac_pci",
	137	.id_table = dw_pci_id_table,
	138	.probe = dw_pci_probe,
	139	.remove = dw_pci_remove,
4501fe61 CCE	140	.driver = {
	141	.pm = &dw_pci_dev_pm_ops,
	142	},
fed42c19 AS	143	};
	144
	145	module_pci_driver(dw_pci_driver);
	146
	147	MODULE_LICENSE("GPL v2");
	148	MODULE_DESCRIPTION("Synopsys DesignWare DMA Controller PCI driver");
	149	MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");