aboutsummaryrefslogtreecommitdiff
path: root/drivers/mmc/host/dw_mmc-pci.c
blob: dc0d25a013e043f40536a125a63420cfe923595d (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
152
153
154
155
156
157
158
/*
 * Synopsys DesignWare Multimedia Card PCI Interface driver
 *
 * Copyright (C) 2012 Vayavya Labs Pvt. Ltd.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/mmc/host.h>
#include <linux/mmc/mmc.h>
#include <linux/mmc/dw_mmc.h>
#include "dw_mmc.h"

#define PCI_BAR_NO 2
#define COMPLETE_BAR 0
#define SYNOPSYS_DW_MCI_VENDOR_ID 0x700
#define SYNOPSYS_DW_MCI_DEVICE_ID 0x1107
/* Defining the Capabilities */
#define DW_MCI_CAPABILITIES (MMC_CAP_4_BIT_DATA | MMC_CAP_MMC_HIGHSPEED |\
				MMC_CAP_SD_HIGHSPEED | MMC_CAP_8_BIT_DATA |\
				MMC_CAP_SDIO_IRQ)

static struct dw_mci_board pci_board_data = {
	.num_slots			= 1,
	.caps				= DW_MCI_CAPABILITIES,
	.bus_hz				= 33 * 1000 * 1000,
	.detect_delay_ms		= 200,
	.fifo_depth			= 32,
};

static int __devinit dw_mci_pci_probe(struct pci_dev *pdev,
				  const struct pci_device_id *entries)
{
	struct dw_mci *host;
	int ret;

	ret = pci_enable_device(pdev);
	if (ret)
		return ret;
	if (pci_request_regions(pdev, "dw_mmc_pci")) {
		ret = -ENODEV;
		goto err_disable_dev;
	}

	host = kzalloc(sizeof(struct dw_mci), GFP_KERNEL);
	if (!host) {
		ret = -ENOMEM;
		goto err_release;
	}

	host->irq = pdev->irq;
	host->irq_flags = IRQF_SHARED;
	host->dev = pdev->dev;
	host->pdata = &pci_board_data;

	host->regs = pci_iomap(pdev, PCI_BAR_NO, COMPLETE_BAR);
	if (!host->regs) {
		ret = -EIO;
		goto err_unmap;
	}

	pci_set_drvdata(pdev, host);
	ret = dw_mci_probe(host);
	if (ret)
		goto err_probe_failed;
	return ret;

err_probe_failed:
	pci_iounmap(pdev, host->regs);
err_unmap:
	kfree(host);
err_release:
	pci_release_regions(pdev);
err_disable_dev:
	pci_disable_device(pdev);
	return ret;
}

static void __devexit dw_mci_pci_remove(struct pci_dev *pdev)
{
	struct dw_mci *host = pci_get_drvdata(pdev);

	dw_mci_remove(host);
	pci_set_drvdata(pdev, NULL);
	pci_release_regions(pdev);
	pci_iounmap(pdev, host->regs);
	kfree(host);
	pci_disable_device(pdev);
}

#ifdef CONFIG_PM_SLEEP
static int dw_mci_pci_suspend(struct device *dev)
{
	int ret;
	struct pci_dev *pdev = to_pci_dev(dev);
	struct dw_mci *host = pci_get_drvdata(pdev);

	ret = dw_mci_suspend(host);
	return ret;
}

static int dw_mci_pci_resume(struct device *dev)
{
	int ret;
	struct pci_dev *pdev = to_pci_dev(dev);
	struct dw_mci *host = pci_get_drvdata(pdev);

	ret = dw_mci_resume(host);
	return ret;
}
#else
#define dw_mci_pci_suspend	NULL
#define dw_mci_pci_resume	NULL
#endif /* CONFIG_PM_SLEEP */

static SIMPLE_DEV_PM_OPS(dw_mci_pci_pmops, dw_mci_pci_suspend, dw_mci_pci_resume);

static DEFINE_PCI_DEVICE_TABLE(dw_mci_pci_id) = {
	{ PCI_DEVICE(SYNOPSYS_DW_MCI_VENDOR_ID, SYNOPSYS_DW_MCI_DEVICE_ID) },
	{}
};
MODULE_DEVICE_TABLE(pci, dw_mci_pci_id);

static struct pci_driver dw_mci_pci_driver = {
	.name		= "dw_mmc_pci",
	.id_table	= dw_mci_pci_id,
	.probe		= dw_mci_pci_probe,
	.remove		= dw_mci_pci_remove,
	.driver		=	{
		.pm =   &dw_mci_pci_pmops
	},
};

static int __init dw_mci_init(void)
{
	return pci_register_driver(&dw_mci_pci_driver);
}

static void __exit dw_mci_exit(void)
{
	pci_unregister_driver(&dw_mci_pci_driver);
}

module_init(dw_mci_init);
module_exit(dw_mci_exit);

MODULE_DESCRIPTION("DW Multimedia Card PCI Interface driver");
MODULE_AUTHOR("Shashidhar Hiremath <shashidharh@vayavyalabs.com>");
MODULE_LICENSE("GPL v2");