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The core dw-mshc controller driver can let platform specific implementations of the dw-mshc controller to control the hardware as required by such implementations. This is acheived by invoking implementation specific (optional) callbacks. Define the list of callbacks supported the add invocation points for the same. Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org> Acked-by: Will Newton <will.newton@imgtec.com> Signed-off-by: Chris Ball <cjb@laptop.org>
146 lines
3.3 KiB
C
146 lines
3.3 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/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 "dw_mmc.h"
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int dw_mci_pltfm_register(struct platform_device *pdev,
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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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int ret;
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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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regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!regs)
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return -ENXIO;
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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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host->regs = devm_request_and_ioremap(&pdev->dev, regs);
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if (!host->regs)
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return -ENOMEM;
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if (host->drv_data->init) {
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ret = host->drv_data->init(host);
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if (ret)
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return ret;
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}
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platform_set_drvdata(pdev, host);
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ret = dw_mci_probe(host);
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return ret;
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}
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EXPORT_SYMBOL_GPL(dw_mci_pltfm_register);
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static int __devinit dw_mci_pltfm_probe(struct platform_device *pdev)
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{
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return dw_mci_pltfm_register(pdev, NULL);
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}
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static int __devexit 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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platform_set_drvdata(pdev, NULL);
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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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#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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int ret;
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struct dw_mci *host = dev_get_drvdata(dev);
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ret = dw_mci_suspend(host);
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if (ret)
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return ret;
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return 0;
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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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int ret;
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struct dw_mci *host = dev_get_drvdata(dev);
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ret = dw_mci_resume(host);
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if (ret)
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return ret;
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return 0;
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}
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#else
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#define dw_mci_pltfm_suspend NULL
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#define dw_mci_pltfm_resume NULL
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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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{},
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};
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MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match);
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static struct platform_driver dw_mci_pltfm_driver = {
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.remove = __exit_p(dw_mci_pltfm_remove),
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.driver = {
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.name = "dw_mmc",
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.of_match_table = of_match_ptr(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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static int __init dw_mci_init(void)
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{
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return platform_driver_probe(&dw_mci_pltfm_driver, dw_mci_pltfm_probe);
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}
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static void __exit dw_mci_exit(void)
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{
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platform_driver_unregister(&dw_mci_pltfm_driver);
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}
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module_init(dw_mci_init);
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module_exit(dw_mci_exit);
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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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