![Andrew Bresticker](/assets/img/avatar_default.png)
Add support for the DW MMC host found on the Imagination Pistachio SoC. Like the DW MMC hosts found on SOCFPGA and Rockchip SoCs, the DW MMC host on Pistachio requires the use of SDMMC_CMD_USE_HOLD_REG. Signed-off-by: Andrew Bresticker <abrestic@chromium.org> Reviewed-by: Doug Anderson <dianders@chromium.org> Acked-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
141 lines
3.5 KiB
C
141 lines
3.5 KiB
C
/*
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* Synopsys DesignWare Multimedia Card Interface driver
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*
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* Copyright (C) 2009 NXP Semiconductors
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* Copyright (C) 2009, 2010 Imagination Technologies Ltd.
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/err.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/io.h>
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#include <linux/irq.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/mmc/host.h>
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#include <linux/mmc/mmc.h>
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#include <linux/mmc/dw_mmc.h>
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#include <linux/of.h>
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#include <linux/clk.h>
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#include "dw_mmc.h"
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#include "dw_mmc-pltfm.h"
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static void dw_mci_pltfm_prepare_command(struct dw_mci *host, u32 *cmdr)
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{
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*cmdr |= SDMMC_CMD_USE_HOLD_REG;
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}
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static const struct dw_mci_drv_data socfpga_drv_data = {
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.prepare_command = dw_mci_pltfm_prepare_command,
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};
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static const struct dw_mci_drv_data pistachio_drv_data = {
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.prepare_command = dw_mci_pltfm_prepare_command,
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};
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int dw_mci_pltfm_register(struct platform_device *pdev,
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const struct dw_mci_drv_data *drv_data)
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{
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struct dw_mci *host;
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struct resource *regs;
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host = devm_kzalloc(&pdev->dev, sizeof(struct dw_mci), GFP_KERNEL);
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if (!host)
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return -ENOMEM;
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host->irq = platform_get_irq(pdev, 0);
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if (host->irq < 0)
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return host->irq;
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host->drv_data = drv_data;
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host->dev = &pdev->dev;
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host->irq_flags = 0;
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host->pdata = pdev->dev.platform_data;
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regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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host->regs = devm_ioremap_resource(&pdev->dev, regs);
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if (IS_ERR(host->regs))
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return PTR_ERR(host->regs);
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platform_set_drvdata(pdev, host);
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return dw_mci_probe(host);
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}
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EXPORT_SYMBOL_GPL(dw_mci_pltfm_register);
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#ifdef CONFIG_PM_SLEEP
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/*
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* TODO: we should probably disable the clock to the card in the suspend path.
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*/
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static int dw_mci_pltfm_suspend(struct device *dev)
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{
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struct dw_mci *host = dev_get_drvdata(dev);
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return dw_mci_suspend(host);
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}
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static int dw_mci_pltfm_resume(struct device *dev)
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{
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struct dw_mci *host = dev_get_drvdata(dev);
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return dw_mci_resume(host);
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}
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#endif /* CONFIG_PM_SLEEP */
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SIMPLE_DEV_PM_OPS(dw_mci_pltfm_pmops, dw_mci_pltfm_suspend, dw_mci_pltfm_resume);
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EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops);
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static const struct of_device_id dw_mci_pltfm_match[] = {
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{ .compatible = "snps,dw-mshc", },
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{ .compatible = "altr,socfpga-dw-mshc",
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.data = &socfpga_drv_data },
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{ .compatible = "img,pistachio-dw-mshc",
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.data = &pistachio_drv_data },
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{},
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};
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MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match);
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static int dw_mci_pltfm_probe(struct platform_device *pdev)
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{
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const struct dw_mci_drv_data *drv_data = NULL;
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const struct of_device_id *match;
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if (pdev->dev.of_node) {
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match = of_match_node(dw_mci_pltfm_match, pdev->dev.of_node);
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drv_data = match->data;
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}
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return dw_mci_pltfm_register(pdev, drv_data);
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}
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int dw_mci_pltfm_remove(struct platform_device *pdev)
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{
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struct dw_mci *host = platform_get_drvdata(pdev);
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dw_mci_remove(host);
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return 0;
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}
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EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove);
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static struct platform_driver dw_mci_pltfm_driver = {
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.probe = dw_mci_pltfm_probe,
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.remove = dw_mci_pltfm_remove,
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.driver = {
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.name = "dw_mmc",
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.of_match_table = dw_mci_pltfm_match,
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.pm = &dw_mci_pltfm_pmops,
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},
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};
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module_platform_driver(dw_mci_pltfm_driver);
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MODULE_DESCRIPTION("DW Multimedia Card Interface driver");
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MODULE_AUTHOR("NXP Semiconductor VietNam");
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MODULE_AUTHOR("Imagination Technologies Ltd");
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MODULE_LICENSE("GPL v2");
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