tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Synopsys DesignWare Multimedia Card Interface driver
3 *
4 * Copyright (C) 2009 NXP Semiconductors
5 * Copyright (C) 2009, 2010 Imagination Technologies Ltd.
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 as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 */
12
13#include <linux/err.h>
14#include <linux/interrupt.h>
15#include <linux/module.h>
16#include <linux/io.h>
17#include <linux/irq.h>
18#include <linux/platform_device.h>
19#include <linux/slab.h>
20#include <linux/mmc/host.h>
21#include <linux/mmc/mmc.h>
22#include <linux/mmc/dw_mmc.h>
23#include <linux/of.h>
24
25#include "dw_mmc.h"
26
27int dw_mci_pltfm_register(struct platform_device *pdev,
28 const struct dw_mci_drv_data *drv_data)
29{
30 struct dw_mci *host;
31 struct resource *regs;
32 int ret;
33
34 host = devm_kzalloc(&pdev->dev, sizeof(struct dw_mci), GFP_KERNEL);
35 if (!host)
36 return -ENOMEM;
37
38 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
39 if (!regs)
40 return -ENXIO;
41
42 host->irq = platform_get_irq(pdev, 0);
43 if (host->irq < 0)
44 return host->irq;
45
46 host->drv_data = drv_data;
47 host->dev = &pdev->dev;
48 host->irq_flags = 0;
49 host->pdata = pdev->dev.platform_data;
50 host->regs = devm_ioremap_resource(&pdev->dev, regs);
51 if (IS_ERR(host->regs))
52 return PTR_ERR(host->regs);
53
54 if (drv_data && drv_data->init) {
55 ret = drv_data->init(host);
56 if (ret)
57 return ret;
58 }
59
60 platform_set_drvdata(pdev, host);
61 ret = dw_mci_probe(host);
62 return ret;
63}
64EXPORT_SYMBOL_GPL(dw_mci_pltfm_register);
65
66static int dw_mci_pltfm_probe(struct platform_device *pdev)
67{
68 return dw_mci_pltfm_register(pdev, NULL);
69}
70
71static int dw_mci_pltfm_remove(struct platform_device *pdev)
72{
73 struct dw_mci *host = platform_get_drvdata(pdev);
74
75 platform_set_drvdata(pdev, NULL);
76 dw_mci_remove(host);
77 return 0;
78}
79EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove);
80
81#ifdef CONFIG_PM_SLEEP
82/*
83 * TODO: we should probably disable the clock to the card in the suspend path.
84 */
85static int dw_mci_pltfm_suspend(struct device *dev)
86{
87 int ret;
88 struct dw_mci *host = dev_get_drvdata(dev);
89
90 ret = dw_mci_suspend(host);
91 if (ret)
92 return ret;
93
94 return 0;
95}
96
97static int dw_mci_pltfm_resume(struct device *dev)
98{
99 int ret;
100 struct dw_mci *host = dev_get_drvdata(dev);
101
102 ret = dw_mci_resume(host);
103 if (ret)
104 return ret;
105
106 return 0;
107}
108#else
109#define dw_mci_pltfm_suspend NULL
110#define dw_mci_pltfm_resume NULL
111#endif /* CONFIG_PM_SLEEP */
112
113SIMPLE_DEV_PM_OPS(dw_mci_pltfm_pmops, dw_mci_pltfm_suspend, dw_mci_pltfm_resume);
114EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops);
115
116static const struct of_device_id dw_mci_pltfm_match[] = {
117 { .compatible = "snps,dw-mshc", },
118 {},
119};
120MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match);
121
122static struct platform_driver dw_mci_pltfm_driver = {
123 .probe = dw_mci_pltfm_probe,
124 .remove = dw_mci_pltfm_remove,
125 .driver = {
126 .name = "dw_mmc",
127 .of_match_table = of_match_ptr(dw_mci_pltfm_match),
128 .pm = &dw_mci_pltfm_pmops,
129 },
130};
131
132module_platform_driver(dw_mci_pltfm_driver);
133
134MODULE_DESCRIPTION("DW Multimedia Card Interface driver");
135MODULE_AUTHOR("NXP Semiconductor VietNam");
136MODULE_AUTHOR("Imagination Technologies Ltd");
137MODULE_LICENSE("GPL v2");