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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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3fc7eaef44
DesignWare MMC Controller can supports two types of DMA mode: external dma and internal dma. We get a RK312x platform integrated dw_mmc and ARM pl330 dma controller. This patch add edmac ops to support these platforms. I've tested it on RK31xx platform with edmac mode and RK3288 platform with idmac mode. Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com> Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
142 lines
3.6 KiB
C
142 lines
3.6 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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/* Get registers' physical base address */
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host->phy_regs = (void *)(regs->start);
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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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