summaryrefslogtreecommitdiffstats
path: root/drivers/dma/dw/pci.c
blob: 1142aa6f8c4accec89eacf7368c1e1e4e7b883fd (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
// SPDX-License-Identifier: GPL-2.0
/*
 * PCI driver for the Synopsys DesignWare DMA Controller
 *
 * Copyright (C) 2013 Intel Corporation
 * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
 */

#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)
{
	const struct dw_dma_chip_pdata *drv_data = (void *)pid->driver_data;
	struct dw_dma_chip_pdata *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;

	data = devm_kmemdup(&pdev->dev, drv_data, sizeof(*drv_data), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	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 = data->pdata;

	data->chip = chip;

	ret = data->probe(chip);
	if (ret)
		return ret;

	dw_dma_acpi_controller_register(chip->dw);

	pci_set_drvdata(pdev, data);

	return 0;
}

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

	dw_dma_acpi_controller_free(chip->dw);

	ret = data->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 dw_dma_chip_pdata *data = dev_get_drvdata(dev);
	struct dw_dma_chip *chip = data->chip;

	return do_dw_dma_disable(chip);
};

static int dw_pci_resume_early(struct device *dev)
{
	struct dw_dma_chip_pdata *data = dev_get_drvdata(dev);
	struct dw_dma_chip *chip = data->chip;

	return do_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), (kernel_ulong_t)&dw_dma_chip_pdata },

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

	/* Merrifield */
	{ PCI_VDEVICE(INTEL, 0x11a2), (kernel_ulong_t)&idma32_chip_pdata },

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

	/* Elkhart Lake iDMA 32-bit (PSE DMA) */
	{ PCI_VDEVICE(INTEL, 0x4bb4), (kernel_ulong_t)&idma32_chip_pdata },
	{ PCI_VDEVICE(INTEL, 0x4bb5), (kernel_ulong_t)&idma32_chip_pdata },
	{ PCI_VDEVICE(INTEL, 0x4bb6), (kernel_ulong_t)&idma32_chip_pdata },

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

	/* Broadwell */
	{ PCI_VDEVICE(INTEL, 0x9ce0), (kernel_ulong_t)&dw_dma_chip_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>");