dw_mmc-pci.c

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/*
 * Synopsys DesignWare Multimedia Card PCI Interface driver
 *
 * Copyright (C) 2012 Vayavya Labs Pvt. Ltd.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/mmc/host.h>
#include <linux/mmc/mmc.h>
#include <linux/mmc/dw_mmc.h>
#include "dw_mmc.h"

#define PCI_BAR_NO 2
#define COMPLETE_BAR 0
#define SYNOPSYS_DW_MCI_VENDOR_ID 0x700
#define SYNOPSYS_DW_MCI_DEVICE_ID 0x1107
/* Defining the Capabilities */
#define DW_MCI_CAPABILITIES (MMC_CAP_4_BIT_DATA | MMC_CAP_MMC_HIGHSPEED |\
                MMC_CAP_SD_HIGHSPEED | MMC_CAP_8_BIT_DATA |\
                MMC_CAP_SDIO_IRQ)

static struct dw_mci_board pci_board_data = {
    .num_slots          = 1,
    .caps               = DW_MCI_CAPABILITIES,
    .bus_hz             = 33 * 1000 * 1000,
    .detect_delay_ms        = 200,
    .fifo_depth         = 32,
};

static int __devinit dw_mci_pci_probe(struct pci_dev *pdev,
                  const struct pci_device_id *entries)
{
    struct dw_mci *host;
    int ret;

    ret = pci_enable_device(pdev);
    if (ret)
        return ret;
    if (pci_request_regions(pdev, "dw_mmc_pci")) {
        ret = -ENODEV;
        goto err_disable_dev;
    }

    host = kzalloc(sizeof(struct dw_mci), GFP_KERNEL);
    if (!host) {
        ret = -ENOMEM;
        goto err_release;
    }

    host->irq = pdev->irq;
    host->irq_flags = IRQF_SHARED;
    host->dev = &pdev->dev;
    host->pdata = &pci_board_data;

    host->regs = pci_iomap(pdev, PCI_BAR_NO, COMPLETE_BAR);
    if (!host->regs) {
        ret = -EIO;
        goto err_unmap;
    }

    pci_set_drvdata(pdev, host);
    ret = dw_mci_probe(host);
    if (ret)
        goto err_probe_failed;
    return ret;

err_probe_failed:
    pci_iounmap(pdev, host->regs);
err_unmap:
    kfree(host);
err_release:
    pci_release_regions(pdev);
err_disable_dev:
    pci_disable_device(pdev);
    return ret;
}

static void __devexit dw_mci_pci_remove(struct pci_dev *pdev)
{
    struct dw_mci *host = pci_get_drvdata(pdev);

    dw_mci_remove(host);
    pci_set_drvdata(pdev, NULL);
    pci_release_regions(pdev);
    pci_iounmap(pdev, host->regs);
    kfree(host);
    pci_disable_device(pdev);
}

#ifdef CONFIG_PM_SLEEP
static int dw_mci_pci_suspend(struct device *dev)
{
    int ret;
    struct pci_dev *pdev = to_pci_dev(dev);
    struct dw_mci *host = pci_get_drvdata(pdev);

    ret = dw_mci_suspend(host);
    return ret;
}

static int dw_mci_pci_resume(struct device *dev)
{
    int ret;
    struct pci_dev *pdev = to_pci_dev(dev);
    struct dw_mci *host = pci_get_drvdata(pdev);

    ret = dw_mci_resume(host);
    return ret;
}
#else
#define dw_mci_pci_suspend  NULL
#define dw_mci_pci_resume   NULL
#endif /* CONFIG_PM_SLEEP */

static SIMPLE_DEV_PM_OPS(dw_mci_pci_pmops, dw_mci_pci_suspend, dw_mci_pci_resume);

static DEFINE_PCI_DEVICE_TABLE(dw_mci_pci_id) = {
    { PCI_DEVICE(SYNOPSYS_DW_MCI_VENDOR_ID, SYNOPSYS_DW_MCI_DEVICE_ID) },
    {}
};
MODULE_DEVICE_TABLE(pci, dw_mci_pci_id);

static struct pci_driver dw_mci_pci_driver = {
    .name       = "dw_mmc_pci",
    .id_table   = dw_mci_pci_id,
    .probe      = dw_mci_pci_probe,
    .remove     = dw_mci_pci_remove,
    .driver     =   {
        .pm =   &dw_mci_pci_pmops
    },
};

module_pci_driver(dw_mci_pci_driver);

MODULE_DESCRIPTION("DW Multimedia Card PCI Interface driver");
MODULE_AUTHOR("Shashidhar Hiremath <[email protected]>");
MODULE_LICENSE("GPL v2");