4 * Copyright (C) 2009 Magnus Damm
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 * Based on "Compaq ASIC3 support":
12 * Copyright 2001 Compaq Computer Corporation.
13 * Copyright 2004-2005 Phil Blundell
14 * Copyright 2007-2008 OpenedHand Ltd.
16 * Authors: Phil Blundell <pb@handhelds.org>,
17 * Samuel Ortiz <sameo@openedhand.com>
21 #include <linux/kernel.h>
22 #include <linux/clk.h>
23 #include <linux/platform_device.h>
25 #include <linux/mfd/core.h>
26 #include <linux/mfd/tmio.h>
27 #include <linux/mfd/sh_mobile_sdhi.h>
29 struct sh_mobile_sdhi {
31 struct tmio_mmc_data mmc_data;
32 struct mfd_cell cell_mmc;
35 static struct resource sh_mobile_sdhi_resources[] = {
39 .flags = IORESOURCE_MEM,
44 .flags = IORESOURCE_IRQ,
48 static struct mfd_cell sh_mobile_sdhi_cell = {
50 .num_resources = ARRAY_SIZE(sh_mobile_sdhi_resources),
51 .resources = sh_mobile_sdhi_resources,
54 static void sh_mobile_sdhi_set_pwr(struct platform_device *tmio, int state)
56 struct platform_device *pdev = to_platform_device(tmio->dev.parent);
57 struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
60 p->set_pwr(pdev, state);
63 static int __init sh_mobile_sdhi_probe(struct platform_device *pdev)
65 struct sh_mobile_sdhi *priv;
70 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
72 dev_err(&pdev->dev, "missing MEM resource\n");
74 irq = platform_get_irq(pdev, 0);
76 dev_err(&pdev->dev, "missing IRQ resource\n");
78 if (!mem || (irq < 0))
81 priv = kzalloc(sizeof(struct sh_mobile_sdhi), GFP_KERNEL);
83 dev_err(&pdev->dev, "kzalloc failed\n");
87 snprintf(clk_name, sizeof(clk_name), "sdhi%d", pdev->id);
88 priv->clk = clk_get(&pdev->dev, clk_name);
89 if (IS_ERR(priv->clk)) {
90 dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
91 ret = PTR_ERR(priv->clk);
96 clk_enable(priv->clk);
98 /* FIXME: silly const unsigned int hclk */
99 *(unsigned int *)&priv->mmc_data.hclk = clk_get_rate(priv->clk);
100 priv->mmc_data.set_pwr = sh_mobile_sdhi_set_pwr;
102 memcpy(&priv->cell_mmc, &sh_mobile_sdhi_cell, sizeof(priv->cell_mmc));
103 priv->cell_mmc.driver_data = &priv->mmc_data;
104 priv->cell_mmc.platform_data = &priv->cell_mmc;
105 priv->cell_mmc.data_size = sizeof(priv->cell_mmc);
107 platform_set_drvdata(pdev, priv);
109 ret = mfd_add_devices(&pdev->dev, pdev->id,
110 &priv->cell_mmc, 1, mem, irq);
112 clk_disable(priv->clk);
120 static int sh_mobile_sdhi_remove(struct platform_device *pdev)
122 struct sh_mobile_sdhi *priv = platform_get_drvdata(pdev);
124 mfd_remove_devices(&pdev->dev);
125 clk_disable(priv->clk);
132 static struct platform_driver sh_mobile_sdhi_driver = {
134 .name = "sh_mobile_sdhi",
135 .owner = THIS_MODULE,
137 .probe = sh_mobile_sdhi_probe,
138 .remove = __devexit_p(sh_mobile_sdhi_remove),
141 static int __init sh_mobile_sdhi_init(void)
143 return platform_driver_register(&sh_mobile_sdhi_driver);
146 static void __exit sh_mobile_sdhi_exit(void)
148 platform_driver_unregister(&sh_mobile_sdhi_driver);
151 module_init(sh_mobile_sdhi_init);
152 module_exit(sh_mobile_sdhi_exit);
154 MODULE_DESCRIPTION("SuperH Mobile SDHI driver");
155 MODULE_AUTHOR("Magnus Damm");
156 MODULE_LICENSE("GPL v2");