linux-imx

/*

 * PCI interface driver for DW SPI Core

 *

 * Copyright (c) 2009, 2014 Intel Corporation.

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms and conditions of the GNU General Public License,

 * version 2, as published by the Free Software Foundation.

 *

 * This program is distributed in the hope it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for

 * more details.

 */

​

#include <linux/interrupt.h>

#include <linux/pci.h>

#include <linux/slab.h>

#include <linux/spi/spi.h>

#include <linux/module.h>

​

#include "spi-dw.h"

​

#define DRIVER_NAME "dw_spi_pci"

​

struct spi_pci_desc {

    int (*setup)(struct dw_spi *);

    u16 num_cs;

    u16 bus_num;

};

​

static struct spi_pci_desc spi_pci_mid_desc_1 = {

    .setup = dw_spi_mid_init,

    .num_cs = 5,

    .bus_num = 0,

};

​

static struct spi_pci_desc spi_pci_mid_desc_2 = {

    .setup = dw_spi_mid_init,

    .num_cs = 2,

    .bus_num = 1,

};

​

static int spi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)

{

    struct dw_spi *dws;

    struct spi_pci_desc *desc = (struct spi_pci_desc *)ent->driver_data;

    int pci_bar = 0;

    int ret;

​

    ret = pcim_enable_device(pdev);

    if (ret)

        return ret;

​

    dws = devm_kzalloc(&pdev->dev, sizeof(*dws), GFP_KERNEL);

    if (!dws)

        return -ENOMEM;

​

    /* Get basic io resource and map it */

    dws->paddr = pci_resource_start(pdev, pci_bar);

​

    ret = pcim_iomap_regions(pdev, 1 << pci_bar, pci_name(pdev));

    if (ret)