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62ca8034d9
Support of PCI mode for the dw_mmc driver. This Patch adds the support for the scenario where the Synopsys Designware IP is present on the PCI bus. The patch adds the minimal modifications necessary for the driver to work on PCI platform. Also added separate files for PCI and PLATFORM modes of operation. Signed-off-by: Shashidhar Hiremath <shashidharh@vayavyalabs.com> Acked-by: James Hogan <james.hogan@imgtec.com> Signed-off-by: Chris Ball <cjb@laptop.org>
135 lines
2.9 KiB
C
135 lines
2.9 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 "dw_mmc.h"
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static int dw_mci_pltfm_probe(struct platform_device *pdev)
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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 = kzalloc(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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ret = -ENXIO;
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goto err_free;
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}
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host->irq = platform_get_irq(pdev, 0);
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if (host->irq < 0) {
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ret = host->irq;
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goto err_free;
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}
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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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ret = -ENOMEM;
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host->regs = ioremap(regs->start, resource_size(regs));
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if (!host->regs)
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goto err_free;
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platform_set_drvdata(pdev, host);
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ret = dw_mci_probe(host);
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if (ret)
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goto err_out;
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return ret;
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err_out:
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iounmap(host->regs);
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err_free:
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kfree(host);
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return ret;
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}
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static int __exit 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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iounmap(host->regs);
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kfree(host);
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return 0;
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}
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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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static SIMPLE_DEV_PM_OPS(dw_mci_pltfm_pmops, dw_mci_pltfm_suspend, dw_mci_pltfm_resume);
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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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.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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