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
29static void dw_mci_pltfm_prepare_command(struct dw_mci *host, u32 *cmdr)
30{
31	*cmdr |= SDMMC_CMD_USE_HOLD_REG;
32}
33
34static const struct dw_mci_drv_data socfpga_drv_data = {
35	.prepare_command	= dw_mci_pltfm_prepare_command,
36};
37
38static const struct dw_mci_drv_data pistachio_drv_data = {
39	.prepare_command	= dw_mci_pltfm_prepare_command,
40};
41
42int 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}
69EXPORT_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 */
75static 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
82static 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
90SIMPLE_DEV_PM_OPS(dw_mci_pltfm_pmops, dw_mci_pltfm_suspend, dw_mci_pltfm_resume);
91EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops);
92
93static 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};
101MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match);
102
103static 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
116int 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}
123EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove);
124
125static 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
135module_platform_driver(dw_mci_pltfm_driver);
136
137MODULE_DESCRIPTION("DW Multimedia Card Interface driver");
138MODULE_AUTHOR("NXP Semiconductor VietNam");
139MODULE_AUTHOR("Imagination Technologies Ltd");
140MODULE_LICENSE("GPL v2");
141