xref: /openbmc/linux/drivers/mmc/host/dw_mmc-pltfm.c (revision ae213c44)
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/pm_runtime.h>
20 #include <linux/slab.h>
21 #include <linux/mmc/host.h>
22 #include <linux/mmc/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 
29 int 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 }
59 EXPORT_SYMBOL_GPL(dw_mci_pltfm_register);
60 
61 const struct dev_pm_ops dw_mci_pltfm_pmops = {
62 	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
63 				pm_runtime_force_resume)
64 	SET_RUNTIME_PM_OPS(dw_mci_runtime_suspend,
65 			   dw_mci_runtime_resume,
66 			   NULL)
67 };
68 EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops);
69 
70 static const struct of_device_id dw_mci_pltfm_match[] = {
71 	{ .compatible = "snps,dw-mshc", },
72 	{ .compatible = "altr,socfpga-dw-mshc", },
73 	{ .compatible = "img,pistachio-dw-mshc", },
74 	{},
75 };
76 MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match);
77 
78 static int dw_mci_pltfm_probe(struct platform_device *pdev)
79 {
80 	const struct dw_mci_drv_data *drv_data = NULL;
81 	const struct of_device_id *match;
82 
83 	if (pdev->dev.of_node) {
84 		match = of_match_node(dw_mci_pltfm_match, pdev->dev.of_node);
85 		drv_data = match->data;
86 	}
87 
88 	return dw_mci_pltfm_register(pdev, drv_data);
89 }
90 
91 int dw_mci_pltfm_remove(struct platform_device *pdev)
92 {
93 	struct dw_mci *host = platform_get_drvdata(pdev);
94 
95 	dw_mci_remove(host);
96 	return 0;
97 }
98 EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove);
99 
100 static struct platform_driver dw_mci_pltfm_driver = {
101 	.probe		= dw_mci_pltfm_probe,
102 	.remove		= dw_mci_pltfm_remove,
103 	.driver		= {
104 		.name		= "dw_mmc",
105 		.of_match_table	= dw_mci_pltfm_match,
106 		.pm		= &dw_mci_pltfm_pmops,
107 	},
108 };
109 
110 module_platform_driver(dw_mci_pltfm_driver);
111 
112 MODULE_DESCRIPTION("DW Multimedia Card Interface driver");
113 MODULE_AUTHOR("NXP Semiconductor VietNam");
114 MODULE_AUTHOR("Imagination Technologies Ltd");
115 MODULE_LICENSE("GPL v2");
116