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
18static 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
24static 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
68static 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
78#ifdef CONFIG_PM_SLEEP
79
80static 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_disable(chip);
86};
87
88static 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_enable(chip);
94};
95
96#endif /* CONFIG_PM_SLEEP */
97
98static const struct dev_pm_ops dw_pci_dev_pm_ops = {
99	SET_LATE_SYSTEM_SLEEP_PM_OPS(dw_pci_suspend_late, dw_pci_resume_early)
100};
101
102static const struct pci_device_id dw_pci_id_table[] = {
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 },
110
111	/* Braswell */
112	{ PCI_VDEVICE(INTEL, 0x2286), (kernel_ulong_t)&dw_pci_pdata },
113	{ PCI_VDEVICE(INTEL, 0x22c0), (kernel_ulong_t)&dw_pci_pdata },
114
115	/* Haswell */
116	{ PCI_VDEVICE(INTEL, 0x9c60), (kernel_ulong_t)&dw_pci_pdata },
117	{ }
118};
119MODULE_DEVICE_TABLE(pci, dw_pci_id_table);
120
121static struct pci_driver dw_pci_driver = {
122	.name		= "dw_dmac_pci",
123	.id_table	= dw_pci_id_table,
124	.probe		= dw_pci_probe,
125	.remove		= dw_pci_remove,
126	.driver	= {
127		.pm	= &dw_pci_dev_pm_ops,
128	},
129};
130
131module_pci_driver(dw_pci_driver);
132
133MODULE_LICENSE("GPL v2");
134MODULE_DESCRIPTION("Synopsys DesignWare DMA Controller PCI driver");
135MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
136