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/mmc/sh_mobile_sdhi.h>
27 #include <linux/mfd/tmio.h>
28 #include <linux/sh_dma.h>
32 struct sh_mobile_sdhi {
34 struct tmio_mmc_data mmc_data;
35 struct sh_dmae_slave param_tx;
36 struct sh_dmae_slave param_rx;
37 struct tmio_mmc_dma dma_priv;
40 static void sh_mobile_sdhi_set_pwr(struct platform_device *pdev, int state)
42 struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
45 p->set_pwr(pdev, state);
48 static int sh_mobile_sdhi_get_cd(struct platform_device *pdev)
50 struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
53 return p->get_cd(pdev);
58 static int __devinit sh_mobile_sdhi_probe(struct platform_device *pdev)
60 struct sh_mobile_sdhi *priv;
61 struct tmio_mmc_data *mmc_data;
62 struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
63 struct tmio_mmc_host *host;
67 priv = kzalloc(sizeof(struct sh_mobile_sdhi), GFP_KERNEL);
69 dev_err(&pdev->dev, "kzalloc failed\n");
73 mmc_data = &priv->mmc_data;
75 snprintf(clk_name, sizeof(clk_name), "sdhi%d", pdev->id);
76 priv->clk = clk_get(&pdev->dev, clk_name);
77 if (IS_ERR(priv->clk)) {
78 dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
79 ret = PTR_ERR(priv->clk);
83 clk_enable(priv->clk);
85 mmc_data->hclk = clk_get_rate(priv->clk);
86 mmc_data->set_pwr = sh_mobile_sdhi_set_pwr;
87 mmc_data->get_cd = sh_mobile_sdhi_get_cd;
88 mmc_data->capabilities = MMC_CAP_MMC_HIGHSPEED;
90 mmc_data->flags = p->tmio_flags;
91 mmc_data->ocr_mask = p->tmio_ocr_mask;
92 mmc_data->capabilities |= p->tmio_caps;
94 if (p->dma_slave_tx >= 0 && p->dma_slave_rx >= 0) {
95 priv->param_tx.slave_id = p->dma_slave_tx;
96 priv->param_rx.slave_id = p->dma_slave_rx;
97 priv->dma_priv.chan_priv_tx = &priv->param_tx;
98 priv->dma_priv.chan_priv_rx = &priv->param_rx;
99 priv->dma_priv.alignment_shift = 1; /* 2-byte alignment */
100 mmc_data->dma = &priv->dma_priv;
105 * All SDHI blocks support 2-byte and larger block sizes in 4-bit
108 mmc_data->flags |= TMIO_MMC_BLKSZ_2BYTES;
111 * All SDHI blocks support SDIO IRQ signalling.
113 mmc_data->flags |= TMIO_MMC_SDIO_IRQ;
115 ret = tmio_mmc_host_probe(&host, pdev, mmc_data);
119 for (i = 0; i < 3; i++) {
120 irq = platform_get_irq(pdev, i);
129 ret = request_irq(irq, tmio_mmc_irq, 0,
130 dev_name(&pdev->dev), host);
133 irq = platform_get_irq(pdev, i);
140 dev_info(&pdev->dev, "%s base at 0x%08lx clock rate %u MHz\n",
141 mmc_hostname(host->mmc), (unsigned long)
142 (platform_get_resource(pdev,IORESOURCE_MEM, 0)->start),
143 mmc_data->hclk / 1000000);
148 tmio_mmc_host_remove(host);
150 clk_disable(priv->clk);
157 static int sh_mobile_sdhi_remove(struct platform_device *pdev)
159 struct mmc_host *mmc = platform_get_drvdata(pdev);
160 struct tmio_mmc_host *host = mmc_priv(mmc);
161 struct sh_mobile_sdhi *priv = container_of(host->pdata, struct sh_mobile_sdhi, mmc_data);
164 for (i = 0; i < 3; i++) {
165 irq = platform_get_irq(pdev, i);
170 tmio_mmc_host_remove(host);
171 clk_disable(priv->clk);
178 static const struct dev_pm_ops tmio_mmc_dev_pm_ops = {
179 .suspend = tmio_mmc_host_suspend,
180 .resume = tmio_mmc_host_resume,
183 static struct platform_driver sh_mobile_sdhi_driver = {
185 .name = "sh_mobile_sdhi",
186 .owner = THIS_MODULE,
187 .pm = &tmio_mmc_dev_pm_ops,
189 .probe = sh_mobile_sdhi_probe,
190 .remove = __devexit_p(sh_mobile_sdhi_remove),
193 static int __init sh_mobile_sdhi_init(void)
195 return platform_driver_register(&sh_mobile_sdhi_driver);
198 static void __exit sh_mobile_sdhi_exit(void)
200 platform_driver_unregister(&sh_mobile_sdhi_driver);
203 module_init(sh_mobile_sdhi_init);
204 module_exit(sh_mobile_sdhi_exit);
206 MODULE_DESCRIPTION("SuperH Mobile SDHI driver");
207 MODULE_AUTHOR("Magnus Damm");
208 MODULE_LICENSE("GPL v2");
209 MODULE_ALIAS("platform:sh_mobile_sdhi");