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/interrupt.h>
14 #include <linux/module.h>
15 #include <linux/io.h>
16 #include <linux/irq.h>
17 #include <linux/platform_device.h>
18 #include <linux/slab.h>
19 #include <linux/mmc/host.h>
20 #include <linux/mmc/mmc.h>
21 #include <linux/mmc/dw_mmc.h>
22 #include "dw_mmc.h"
23
dw_mci_pltfm_probe(struct platform_device * pdev)24 static int dw_mci_pltfm_probe(struct platform_device *pdev)
25 {
26 struct dw_mci *host;
27 struct resource *regs;
28 int ret;
29
30 host = kzalloc(sizeof(struct dw_mci), GFP_KERNEL);
31 if (!host)
32 return -ENOMEM;
33
34 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
35 if (!regs) {
36 ret = -ENXIO;
37 goto err_free;
38 }
39
40 host->irq = platform_get_irq(pdev, 0);
41 if (host->irq < 0) {
42 ret = host->irq;
43 goto err_free;
44 }
45
46 host->dev = pdev->dev;
47 host->irq_flags = 0;
48 host->pdata = pdev->dev.platform_data;
49 ret = -ENOMEM;
50 host->regs = ioremap(regs->start, resource_size(regs));
51 if (!host->regs)
52 goto err_free;
53 platform_set_drvdata(pdev, host);
54 ret = dw_mci_probe(host);
55 if (ret)
56 goto err_out;
57 return ret;
58 err_out:
59 iounmap(host->regs);
60 err_free:
61 kfree(host);
62 return ret;
63 }
64
dw_mci_pltfm_remove(struct platform_device * pdev)65 static int __exit dw_mci_pltfm_remove(struct platform_device *pdev)
66 {
67 struct dw_mci *host = platform_get_drvdata(pdev);
68
69 platform_set_drvdata(pdev, NULL);
70 dw_mci_remove(host);
71 iounmap(host->regs);
72 kfree(host);
73 return 0;
74 }
75
76 #ifdef CONFIG_PM_SLEEP
77 /*
78 * TODO: we should probably disable the clock to the card in the suspend path.
79 */
dw_mci_pltfm_suspend(struct device * dev)80 static int dw_mci_pltfm_suspend(struct device *dev)
81 {
82 int ret;
83 struct dw_mci *host = dev_get_drvdata(dev);
84
85 ret = dw_mci_suspend(host);
86 if (ret)
87 return ret;
88
89 return 0;
90 }
91
dw_mci_pltfm_resume(struct device * dev)92 static int dw_mci_pltfm_resume(struct device *dev)
93 {
94 int ret;
95 struct dw_mci *host = dev_get_drvdata(dev);
96
97 ret = dw_mci_resume(host);
98 if (ret)
99 return ret;
100
101 return 0;
102 }
103 #else
104 #define dw_mci_pltfm_suspend NULL
105 #define dw_mci_pltfm_resume NULL
106 #endif /* CONFIG_PM_SLEEP */
107
108 static SIMPLE_DEV_PM_OPS(dw_mci_pltfm_pmops, dw_mci_pltfm_suspend, dw_mci_pltfm_resume);
109
110 static struct platform_driver dw_mci_pltfm_driver = {
111 .remove = __exit_p(dw_mci_pltfm_remove),
112 .driver = {
113 .name = "dw_mmc",
114 .pm = &dw_mci_pltfm_pmops,
115 },
116 };
117
dw_mci_init(void)118 static int __init dw_mci_init(void)
119 {
120 return platform_driver_probe(&dw_mci_pltfm_driver, dw_mci_pltfm_probe);
121 }
122
dw_mci_exit(void)123 static void __exit dw_mci_exit(void)
124 {
125 platform_driver_unregister(&dw_mci_pltfm_driver);
126 }
127
128 module_init(dw_mci_init);
129 module_exit(dw_mci_exit);
130
131 MODULE_DESCRIPTION("DW Multimedia Card Interface driver");
132 MODULE_AUTHOR("NXP Semiconductor VietNam");
133 MODULE_AUTHOR("Imagination Technologies Ltd");
134 MODULE_LICENSE("GPL v2");
135