Merge tag 'lsk-android-14.02' into develop-3.10
[firefly-linux-kernel-4.4.55.git] / drivers / mmc / host / dw_mmc-pltfm.c
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/rk_mmc.h>
23 #include <linux/of.h>
24
25 #include "rk_sdmmc.h"
26
27
28 int dw_mci_pltfm_register(struct platform_device *pdev,
29                                 const struct dw_mci_drv_data *drv_data)
30 {
31         struct dw_mci *host;
32         struct resource *regs;
33         int ret;
34
35         host = devm_kzalloc(&pdev->dev, sizeof(struct dw_mci), GFP_KERNEL);
36         if (!host)
37                 return -ENOMEM;
38
39         regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
40         if (!regs)
41                 return -ENXIO;
42
43         host->irq = platform_get_irq(pdev, 0);
44         if (host->irq < 0)
45                 return host->irq;
46
47         host->drv_data = drv_data;
48         host->dev = &pdev->dev;
49         host->irq_flags = 0;
50         host->pdata = pdev->dev.platform_data;
51         host->regs = devm_ioremap_resource(&pdev->dev, regs);
52         if (IS_ERR(host->regs))
53                 return PTR_ERR(host->regs);
54
55         if (drv_data && drv_data->init) {
56                 ret = drv_data->init(host);
57                 if (ret)
58                         return ret;
59         }
60
61         platform_set_drvdata(pdev, host);
62         ret = dw_mci_probe(host);
63         return ret;
64 }
65 EXPORT_SYMBOL_GPL(dw_mci_pltfm_register);
66
67 static int dw_mci_pltfm_probe(struct platform_device *pdev)
68 {
69         return dw_mci_pltfm_register(pdev, NULL);
70 }
71
72 static int dw_mci_pltfm_remove(struct platform_device *pdev)
73 {
74         struct dw_mci *host = platform_get_drvdata(pdev);
75
76         platform_set_drvdata(pdev, NULL);
77         dw_mci_remove(host);
78         return 0;
79 }
80 EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove);
81
82 #ifdef CONFIG_PM_SLEEP
83 /*
84  * TODO: we should probably disable the clock to the card in the suspend path.
85  */
86 static int dw_mci_pltfm_suspend(struct device *dev)
87 {
88         int ret;
89         struct dw_mci *host = dev_get_drvdata(dev);
90
91         ret = dw_mci_suspend(host);
92         if (ret)
93                 return ret;
94
95         return 0;
96 }
97
98 static int dw_mci_pltfm_resume(struct device *dev)
99 {
100         int ret;
101         struct dw_mci *host = dev_get_drvdata(dev);
102
103         ret = dw_mci_resume(host);
104         if (ret)
105                 return ret;
106
107         return 0;
108 }
109 #else
110 #define dw_mci_pltfm_suspend    NULL
111 #define dw_mci_pltfm_resume     NULL
112 #endif /* CONFIG_PM_SLEEP */
113
114 SIMPLE_DEV_PM_OPS(dw_mci_pltfm_pmops, dw_mci_pltfm_suspend, dw_mci_pltfm_resume);
115 EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops);
116
117 static const struct of_device_id dw_mci_pltfm_match[] = {
118         { .compatible = "snps,dw-mshc", },
119         {},
120 };
121 MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match);
122
123 static struct platform_driver dw_mci_pltfm_driver = {
124         .probe          = dw_mci_pltfm_probe,
125         .remove         = dw_mci_pltfm_remove,
126         .driver         = {
127                 .name           = "dw_mmc",
128                 .of_match_table = of_match_ptr(dw_mci_pltfm_match),
129                 .pm             = &dw_mci_pltfm_pmops,
130         },
131 };
132
133 module_platform_driver(dw_mci_pltfm_driver);
134
135 MODULE_DESCRIPTION("DW Multimedia Card Interface driver");
136 MODULE_AUTHOR("NXP Semiconductor VietNam");
137 MODULE_AUTHOR("Imagination Technologies Ltd");
138 MODULE_LICENSE("GPL v2");