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