![Arnd Hannemann](/assets/img/avatar_default.png)
The SDHI Controller on SH-Mobile SoCs supports SDIO IRQ signalling. This patch advertises this fact to the tmio_mmc driver. Signed-off-by: Arnd Hannemann <arnd@arndnet.de> Acked-by: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by: Chris Ball <cjb@laptop.org>
203 lines
4.9 KiB
C
203 lines
4.9 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/slab.h>
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#include <linux/platform_device.h>
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#include <linux/mmc/host.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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#include <linux/sh_dma.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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struct sh_dmae_slave param_tx;
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struct sh_dmae_slave param_rx;
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struct tmio_mmc_dma dma_priv;
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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 sh_mobile_sdhi_get_cd(struct platform_device *tmio)
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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->get_cd)
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return p->get_cd(pdev);
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else
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return -ENOSYS;
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}
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static int __devinit 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 tmio_mmc_data *mmc_data;
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struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
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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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mmc_data = &priv->mmc_data;
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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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mmc_data->hclk = clk_get_rate(priv->clk);
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mmc_data->set_pwr = sh_mobile_sdhi_set_pwr;
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mmc_data->get_cd = sh_mobile_sdhi_get_cd;
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mmc_data->capabilities = MMC_CAP_MMC_HIGHSPEED;
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if (p) {
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mmc_data->flags = p->tmio_flags;
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mmc_data->ocr_mask = p->tmio_ocr_mask;
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mmc_data->capabilities |= p->tmio_caps;
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}
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/*
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* All SDHI blocks support 2-byte and larger block sizes in 4-bit
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* bus width mode.
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*/
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mmc_data->flags |= TMIO_MMC_BLKSZ_2BYTES;
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/*
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* All SDHI blocks support SDIO IRQ signalling.
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*/
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mmc_data->flags |= TMIO_MMC_SDIO_IRQ;
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if (p && p->dma_slave_tx >= 0 && p->dma_slave_rx >= 0) {
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priv->param_tx.slave_id = p->dma_slave_tx;
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priv->param_rx.slave_id = p->dma_slave_rx;
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priv->dma_priv.chan_priv_tx = &priv->param_tx;
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priv->dma_priv.chan_priv_rx = &priv->param_rx;
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priv->dma_priv.alignment_shift = 1; /* 2-byte alignment */
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mmc_data->dma = &priv->dma_priv;
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}
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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 = 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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