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
dw_mci_pltfm_prepare_command(struct dw_mci * host,u32 * cmdr)29 static void dw_mci_pltfm_prepare_command(struct dw_mci *host, u32 *cmdr)
30 {
31 *cmdr |= SDMMC_CMD_USE_HOLD_REG;
32 }
33
34 static const struct dw_mci_drv_data socfpga_drv_data = {
35 .prepare_command = dw_mci_pltfm_prepare_command,
36 };
37
38 static const struct dw_mci_drv_data pistachio_drv_data = {
39 .prepare_command = dw_mci_pltfm_prepare_command,
40 };
41
dw_mci_pltfm_register(struct platform_device * pdev,const struct dw_mci_drv_data * drv_data)42 int dw_mci_pltfm_register(struct platform_device *pdev,
43 const struct dw_mci_drv_data *drv_data)
44 {
45 struct dw_mci *host;
46 struct resource *regs;
47
48 host = devm_kzalloc(&pdev->dev, sizeof(struct dw_mci), GFP_KERNEL);
49 if (!host)
50 return -ENOMEM;
51
52 host->irq = platform_get_irq(pdev, 0);
53 if (host->irq < 0)
54 return host->irq;
55
56 host->drv_data = drv_data;
57 host->dev = &pdev->dev;
58 host->irq_flags = 0;
59 host->pdata = pdev->dev.platform_data;
60
61 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
62 host->regs = devm_ioremap_resource(&pdev->dev, regs);
63 if (IS_ERR(host->regs))
64 return PTR_ERR(host->regs);
65
66 platform_set_drvdata(pdev, host);
67 return dw_mci_probe(host);
68 }
69 EXPORT_SYMBOL_GPL(dw_mci_pltfm_register);
70
71 #ifdef CONFIG_PM_SLEEP
72 /*
73 * TODO: we should probably disable the clock to the card in the suspend path.
74 */
dw_mci_pltfm_suspend(struct device * dev)75 static int dw_mci_pltfm_suspend(struct device *dev)
76 {
77 struct dw_mci *host = dev_get_drvdata(dev);
78
79 return dw_mci_suspend(host);
80 }
81
dw_mci_pltfm_resume(struct device * dev)82 static int dw_mci_pltfm_resume(struct device *dev)
83 {
84 struct dw_mci *host = dev_get_drvdata(dev);
85
86 return dw_mci_resume(host);
87 }
88 #endif /* CONFIG_PM_SLEEP */
89
90 SIMPLE_DEV_PM_OPS(dw_mci_pltfm_pmops, dw_mci_pltfm_suspend, dw_mci_pltfm_resume);
91 EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops);
92
93 static const struct of_device_id dw_mci_pltfm_match[] = {
94 { .compatible = "snps,dw-mshc", },
95 { .compatible = "altr,socfpga-dw-mshc",
96 .data = &socfpga_drv_data },
97 { .compatible = "img,pistachio-dw-mshc",
98 .data = &pistachio_drv_data },
99 {},
100 };
101 MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match);
102
dw_mci_pltfm_probe(struct platform_device * pdev)103 static int dw_mci_pltfm_probe(struct platform_device *pdev)
104 {
105 const struct dw_mci_drv_data *drv_data = NULL;
106 const struct of_device_id *match;
107
108 if (pdev->dev.of_node) {
109 match = of_match_node(dw_mci_pltfm_match, pdev->dev.of_node);
110 drv_data = match->data;
111 }
112
113 return dw_mci_pltfm_register(pdev, drv_data);
114 }
115
dw_mci_pltfm_remove(struct platform_device * pdev)116 int dw_mci_pltfm_remove(struct platform_device *pdev)
117 {
118 struct dw_mci *host = platform_get_drvdata(pdev);
119
120 dw_mci_remove(host);
121 return 0;
122 }
123 EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove);
124
125 static struct platform_driver dw_mci_pltfm_driver = {
126 .probe = dw_mci_pltfm_probe,
127 .remove = dw_mci_pltfm_remove,
128 .driver = {
129 .name = "dw_mmc",
130 .of_match_table = dw_mci_pltfm_match,
131 .pm = &dw_mci_pltfm_pmops,
132 },
133 };
134
135 module_platform_driver(dw_mci_pltfm_driver);
136
137 MODULE_DESCRIPTION("DW Multimedia Card Interface driver");
138 MODULE_AUTHOR("NXP Semiconductor VietNam");
139 MODULE_AUTHOR("Imagination Technologies Ltd");
140 MODULE_LICENSE("GPL v2");
141