linux_kernel/drivers/mmc/host/dw_mmc-pci.c

/*
 * 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/pm_runtime.h>
#include <linux/slab.h>
#include <linux/mmc/host.h>
#include <linux/mmc/mmc.h>
#include "dw_mmc.h"

#define PCI_BAR_NO 2
#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 dw_mci_pci_probe(struct pci_dev *pdev,
			    const struct pci_device_id *entries)
{
	struct dw_mci *host;
	int ret;

	ret = pcim_enable_device(pdev);
	if (ret)
		return ret;

	host = devm_kzalloc(&pdev->dev, sizeof(struct dw_mci), GFP_KERNEL);
	if (!host)
		return -ENOMEM;

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

	ret = pcim_iomap_regions(pdev, 1 << PCI_BAR_NO, pci_name(pdev));
	if (ret)
		return ret;

	host->regs = pcim_iomap_table(pdev)[PCI_BAR_NO];

	pci_set_master(pdev);

	ret = dw_mci_probe(host);
	if (ret)
		return ret;

	pci_set_drvdata(pdev, host);

	return 0;
}

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

	dw_mci_remove(host);
}

static const struct dev_pm_ops dw_mci_pci_dev_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
				pm_runtime_force_resume)
	SET_RUNTIME_PM_OPS(dw_mci_runtime_suspend,
			   dw_mci_runtime_resume,
			   NULL)
};

static const struct pci_device_id 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_dev_pm_ops,
	},
};

module_pci_driver(dw_mci_pci_driver);

MODULE_DESCRIPTION("DW Multimedia Card PCI Interface driver");
MODULE_AUTHOR("Shashidhar Hiremath <shashidharh@vayavyalabs.com>");
MODULE_LICENSE("GPL v2");