linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * PCI driver for the Synopsys DesignWare DMA Controller

 *

 * Copyright (C) 2013 Intel Corporation

 * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

 */

​

#include <linux/module.h>

#include <linux/pci.h>

#include <linux/device.h>

​

#include "internal.h"

​

struct dw_dma_pci_data {

    const struct dw_dma_platform_data *pdata;

    int (*probe)(struct dw_dma_chip *chip);

};

​

static const struct dw_dma_pci_data dw_pci_data = {

    .probe = dw_dma_probe,

};

​

static const struct dw_dma_platform_data idma32_pdata = {

    .nr_channels = 8,

    .chan_allocation_order = CHAN_ALLOCATION_ASCENDING,

    .chan_priority = CHAN_PRIORITY_ASCENDING,

    .block_size = 131071,

    .nr_masters = 1,

    .data_width = {4},

    .multi_block = {1, 1, 1, 1, 1, 1, 1, 1},

};

​

static const struct dw_dma_pci_data idma32_pci_data = {

    .pdata = &idma32_pdata,

    .probe = idma32_dma_probe,

};

​

static int dw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid)

{

    const struct dw_dma_pci_data *data = (void *)pid->driver_data;

    struct dw_dma_chip *chip;

    int ret;

​

    ret = pcim_enable_device(pdev);

    if (ret)

        return ret;

​

    ret = pcim_iomap_regions(pdev, 1 << 0, pci_name(pdev));

    if (ret) {

        dev_err(&pdev->dev, "I/O memory remapping failed\n");

        return ret;

    }

​

    pci_set_master(pdev);

    pci_try_set_mwi(pdev);

​

    ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));

    if (ret)

        return ret;

​

    ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));

    if (ret)