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/slab.h>
24 #include <linux/platform_device.h>
25 #include <linux/mmc/host.h>
26 #include <linux/mfd/core.h>
27 #include <linux/mfd/tmio.h>
28 #include <linux/mfd/sh_mobile_sdhi.h>
29 #include <linux/sh_dma.h>
31 struct sh_mobile_sdhi {
33 struct tmio_mmc_data mmc_data;
34 struct mfd_cell cell_mmc;
35 struct sh_dmae_slave param_tx;
36 struct sh_dmae_slave param_rx;
37 struct tmio_mmc_dma dma_priv;
40 static struct resource sh_mobile_sdhi_resources[] = {
44 .flags = IORESOURCE_MEM,
49 .flags = IORESOURCE_IRQ,
53 static struct mfd_cell sh_mobile_sdhi_cell = {
55 .num_resources = ARRAY_SIZE(sh_mobile_sdhi_resources),
56 .resources = sh_mobile_sdhi_resources,
59 static void sh_mobile_sdhi_set_pwr(struct platform_device *tmio, int state)
61 struct platform_device *pdev = to_platform_device(tmio->dev.parent);
62 struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
65 p->set_pwr(pdev, state);
68 static int __init sh_mobile_sdhi_probe(struct platform_device *pdev)
70 struct sh_mobile_sdhi *priv;
71 struct tmio_mmc_data *mmc_data;
72 struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
77 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
79 dev_err(&pdev->dev, "missing MEM resource\n");
81 irq = platform_get_irq(pdev, 0);
83 dev_err(&pdev->dev, "missing IRQ resource\n");
85 if (!mem || (irq < 0))
88 priv = kzalloc(sizeof(struct sh_mobile_sdhi), GFP_KERNEL);
90 dev_err(&pdev->dev, "kzalloc failed\n");
94 mmc_data = &priv->mmc_data;
96 snprintf(clk_name, sizeof(clk_name), "sdhi%d", pdev->id);
97 priv->clk = clk_get(&pdev->dev, clk_name);
98 if (IS_ERR(priv->clk)) {
99 dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
100 ret = PTR_ERR(priv->clk);
105 clk_enable(priv->clk);
107 mmc_data->hclk = clk_get_rate(priv->clk);
108 mmc_data->set_pwr = sh_mobile_sdhi_set_pwr;
109 mmc_data->capabilities = MMC_CAP_MMC_HIGHSPEED;
111 mmc_data->flags = p->tmio_flags;
112 mmc_data->ocr_mask = p->tmio_ocr_mask;
115 if (p && p->dma_slave_tx >= 0 && p->dma_slave_rx >= 0) {
116 priv->param_tx.slave_id = p->dma_slave_tx;
117 priv->param_rx.slave_id = p->dma_slave_rx;
118 priv->dma_priv.chan_priv_tx = &priv->param_tx;
119 priv->dma_priv.chan_priv_rx = &priv->param_rx;
120 mmc_data->dma = &priv->dma_priv;
123 memcpy(&priv->cell_mmc, &sh_mobile_sdhi_cell, sizeof(priv->cell_mmc));
124 priv->cell_mmc.driver_data = mmc_data;
125 priv->cell_mmc.platform_data = &priv->cell_mmc;
126 priv->cell_mmc.data_size = sizeof(priv->cell_mmc);
128 platform_set_drvdata(pdev, priv);
130 ret = mfd_add_devices(&pdev->dev, pdev->id,
131 &priv->cell_mmc, 1, mem, irq);
133 clk_disable(priv->clk);
141 static int sh_mobile_sdhi_remove(struct platform_device *pdev)
143 struct sh_mobile_sdhi *priv = platform_get_drvdata(pdev);
145 mfd_remove_devices(&pdev->dev);
146 clk_disable(priv->clk);
153 static struct platform_driver sh_mobile_sdhi_driver = {
155 .name = "sh_mobile_sdhi",
156 .owner = THIS_MODULE,
158 .probe = sh_mobile_sdhi_probe,
159 .remove = __devexit_p(sh_mobile_sdhi_remove),
162 static int __init sh_mobile_sdhi_init(void)
164 return platform_driver_register(&sh_mobile_sdhi_driver);
167 static void __exit sh_mobile_sdhi_exit(void)
169 platform_driver_unregister(&sh_mobile_sdhi_driver);
172 module_init(sh_mobile_sdhi_init);
173 module_exit(sh_mobile_sdhi_exit);
175 MODULE_DESCRIPTION("SuperH Mobile SDHI driver");
176 MODULE_AUTHOR("Magnus Damm");
177 MODULE_LICENSE("GPL v2");