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 /* Get registers' physical base address */
67 host->phy_regs = regs->start;
68
69 platform_set_drvdata(pdev, host);
70 return dw_mci_probe(host);
71 }
72 EXPORT_SYMBOL_GPL(dw_mci_pltfm_register);
73
74 #ifdef CONFIG_PM_SLEEP
75 /*
76 * TODO: we should probably disable the clock to the card in the suspend path.
77 */
dw_mci_pltfm_suspend(struct device * dev)78 static int dw_mci_pltfm_suspend(struct device *dev)
79 {
80 struct dw_mci *host = dev_get_drvdata(dev);
81
82 return dw_mci_suspend(host);
83 }
84
dw_mci_pltfm_resume(struct device * dev)85 static int dw_mci_pltfm_resume(struct device *dev)
86 {
87 struct dw_mci *host = dev_get_drvdata(dev);
88
89 return dw_mci_resume(host);
90 }
91 #endif /* CONFIG_PM_SLEEP */
92
93 SIMPLE_DEV_PM_OPS(dw_mci_pltfm_pmops, dw_mci_pltfm_suspend, dw_mci_pltfm_resume);
94 EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops);
95
96 static const struct of_device_id dw_mci_pltfm_match[] = {
97 { .compatible = "snps,dw-mshc", },
98 { .compatible = "altr,socfpga-dw-mshc",
99 .data = &socfpga_drv_data },
100 { .compatible = "img,pistachio-dw-mshc",
101 .data = &pistachio_drv_data },
102 {},
103 };
104 MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match);
105
dw_mci_pltfm_probe(struct platform_device * pdev)106 static int dw_mci_pltfm_probe(struct platform_device *pdev)
107 {
108 const struct dw_mci_drv_data *drv_data = NULL;
109 const struct of_device_id *match;
110
111 if (pdev->dev.of_node) {
112 match = of_match_node(dw_mci_pltfm_match, pdev->dev.of_node);
113 drv_data = match->data;
114 }
115
116 return dw_mci_pltfm_register(pdev, drv_data);
117 }
118
dw_mci_pltfm_remove(struct platform_device * pdev)119 int dw_mci_pltfm_remove(struct platform_device *pdev)
120 {
121 struct dw_mci *host = platform_get_drvdata(pdev);
122
123 dw_mci_remove(host);
124 return 0;
125 }
126 EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove);
127
128 static struct platform_driver dw_mci_pltfm_driver = {
129 .probe = dw_mci_pltfm_probe,
130 .remove = dw_mci_pltfm_remove,
131 .driver = {
132 .name = "dw_mmc",
133 .of_match_table = dw_mci_pltfm_match,
134 .pm = &dw_mci_pltfm_pmops,
135 },
136 };
137
138 module_platform_driver(dw_mci_pltfm_driver);
139
140 MODULE_DESCRIPTION("DW Multimedia Card Interface driver");
141 MODULE_AUTHOR("NXP Semiconductor VietNam");
142 MODULE_AUTHOR("Imagination Technologies Ltd");
143 MODULE_LICENSE("GPL v2");
144