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
|
/*
* 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 },
/* Braswell */
{ PCI_VDEVICE(INTEL, 0x2286), (kernel_ulong_t)&dw_pci_pdata },
{ PCI_VDEVICE(INTEL, 0x22c0), (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>");
|
