be9cd7b6f8
This patch adds platform data with a function for power control to the SDHI driver. The idea is that board specific code can provide their own functions so power can be enabled and disabled for the sd-cards. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
156 lines
3.6 KiB
C
156 lines
3.6 KiB
C
/*
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* SuperH Mobile SDHI
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*
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* Copyright (C) 2009 Magnus Damm
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Based on "Compaq ASIC3 support":
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*
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* Copyright 2001 Compaq Computer Corporation.
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* Copyright 2004-2005 Phil Blundell
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* Copyright 2007-2008 OpenedHand Ltd.
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*
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* Authors: Phil Blundell <pb@handhelds.org>,
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* Samuel Ortiz <sameo@openedhand.com>
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*
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*/
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#include <linux/kernel.h>
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#include <linux/clk.h>
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#include <linux/platform_device.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/tmio.h>
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#include <linux/mfd/sh_mobile_sdhi.h>
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struct sh_mobile_sdhi {
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struct clk *clk;
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struct tmio_mmc_data mmc_data;
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struct mfd_cell cell_mmc;
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};
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static struct resource sh_mobile_sdhi_resources[] = {
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{
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.start = 0x000,
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.end = 0x1ff,
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.flags = IORESOURCE_MEM,
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},
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{
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.start = 0,
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.end = 0,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct mfd_cell sh_mobile_sdhi_cell = {
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.name = "tmio-mmc",
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.num_resources = ARRAY_SIZE(sh_mobile_sdhi_resources),
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.resources = sh_mobile_sdhi_resources,
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};
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static void sh_mobile_sdhi_set_pwr(struct platform_device *tmio, int state)
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{
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struct platform_device *pdev = to_platform_device(tmio->dev.parent);
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struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
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if (p && p->set_pwr)
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p->set_pwr(pdev, state);
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}
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static int __init sh_mobile_sdhi_probe(struct platform_device *pdev)
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{
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struct sh_mobile_sdhi *priv;
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struct resource *mem;
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char clk_name[8];
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int ret, irq;
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mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!mem)
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dev_err(&pdev->dev, "missing MEM resource\n");
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irq = platform_get_irq(pdev, 0);
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if (irq < 0)
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dev_err(&pdev->dev, "missing IRQ resource\n");
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if (!mem || (irq < 0))
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return -EINVAL;
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priv = kzalloc(sizeof(struct sh_mobile_sdhi), GFP_KERNEL);
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if (priv == NULL) {
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dev_err(&pdev->dev, "kzalloc failed\n");
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return -ENOMEM;
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}
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snprintf(clk_name, sizeof(clk_name), "sdhi%d", pdev->id);
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priv->clk = clk_get(&pdev->dev, clk_name);
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if (IS_ERR(priv->clk)) {
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dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
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ret = PTR_ERR(priv->clk);
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kfree(priv);
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return ret;
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}
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clk_enable(priv->clk);
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/* FIXME: silly const unsigned int hclk */
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*(unsigned int *)&priv->mmc_data.hclk = clk_get_rate(priv->clk);
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priv->mmc_data.set_pwr = sh_mobile_sdhi_set_pwr;
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memcpy(&priv->cell_mmc, &sh_mobile_sdhi_cell, sizeof(priv->cell_mmc));
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priv->cell_mmc.driver_data = &priv->mmc_data;
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priv->cell_mmc.platform_data = &priv->cell_mmc;
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priv->cell_mmc.data_size = sizeof(priv->cell_mmc);
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platform_set_drvdata(pdev, priv);
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ret = mfd_add_devices(&pdev->dev, pdev->id,
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&priv->cell_mmc, 1, mem, irq);
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if (ret) {
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clk_disable(priv->clk);
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clk_put(priv->clk);
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kfree(priv);
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}
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return ret;
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}
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static int sh_mobile_sdhi_remove(struct platform_device *pdev)
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{
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struct sh_mobile_sdhi *priv = platform_get_drvdata(pdev);
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mfd_remove_devices(&pdev->dev);
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clk_disable(priv->clk);
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clk_put(priv->clk);
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kfree(priv);
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return 0;
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}
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static struct platform_driver sh_mobile_sdhi_driver = {
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.driver = {
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.name = "sh_mobile_sdhi",
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.owner = THIS_MODULE,
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},
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.probe = sh_mobile_sdhi_probe,
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.remove = __devexit_p(sh_mobile_sdhi_remove),
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};
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static int __init sh_mobile_sdhi_init(void)
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{
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return platform_driver_register(&sh_mobile_sdhi_driver);
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}
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static void __exit sh_mobile_sdhi_exit(void)
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{
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platform_driver_unregister(&sh_mobile_sdhi_driver);
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}
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module_init(sh_mobile_sdhi_init);
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module_exit(sh_mobile_sdhi_exit);
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MODULE_DESCRIPTION("SuperH Mobile SDHI driver");
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MODULE_AUTHOR("Magnus Damm");
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MODULE_LICENSE("GPL v2");
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