// 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"

static int dw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid)
{
        const struct dw_dma_chip_pdata *drv_data = (void *)pid->driver_data;
        struct dw_dma_chip_pdata *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 = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
        if (ret)
                return ret;

        data = devm_kmemdup(&pdev->dev, drv_data, sizeof(*drv_data), GFP_KERNEL);
        if (!data)
                return -ENOMEM;

        chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);
        if (!chip)
                return -ENOMEM;

        chip->dev = &pdev->dev;
        chip->id = pdev->devfn;
        chip->regs = pcim_iomap_table(pdev)[0];
        chip->irq = pdev->irq;
        chip->pdata = data->pdata;

        data->chip = chip;

        ret = data->probe(chip);
        if (ret)
                return ret;

        pci_set_drvdata(pdev, data);

        dw_dma_acpi_controller_register(chip->dw);

        return 0;
}

static void dw_pci_remove(struct pci_dev *pdev)
{
        struct dw_dma_chip_pdata *data = pci_get_drvdata(pdev);
        struct dw_dma_chip *chip = data->chip;
        int ret;

        dw_dma_acpi_controller_free(chip->dw);

        ret = data->remove(chip);
        if (ret)
                dev_warn(&pdev->dev, "can't remove device properly: %d\n", ret);
}

static int dw_pci_suspend_late(struct device *dev)
{
        struct dw_dma_chip_pdata *data = dev_get_drvdata(dev);
        struct dw_dma_chip *chip = data->chip;

        return do_dw_dma_disable(chip);
};

static int dw_pci_resume_early(struct device *dev)
{
        struct dw_dma_chip_pdata *data = dev_get_drvdata(dev);
        struct dw_dma_chip *chip = data->chip;

        return do_dw_dma_enable(chip);
};

static const struct dev_pm_ops dw_pci_dev_pm_ops = {
        LATE_SYSTEM_SLEEP_PM_OPS(dw_pci_suspend_late, dw_pci_resume_early)
};

static const struct pci_device_id dw_pci_id_table[] = {
        /* Medfield (GPDMA) */
        { PCI_VDEVICE(INTEL, 0x0827), (kernel_ulong_t)&dw_dma_chip_pdata },

        /* BayTrail */
        { PCI_VDEVICE(INTEL, 0x0f06), (kernel_ulong_t)&dw_dma_chip_pdata },
        { PCI_VDEVICE(INTEL, 0x0f40), (kernel_ulong_t)&dw_dma_chip_pdata },

        /* Merrifield */
        { PCI_VDEVICE(INTEL, 0x11a2), (kernel_ulong_t)&idma32_chip_pdata },

        /* Braswell */
        { PCI_VDEVICE(INTEL, 0x2286), (kernel_ulong_t)&dw_dma_chip_pdata },
        { PCI_VDEVICE(INTEL, 0x22c0), (kernel_ulong_t)&dw_dma_chip_pdata },

        /* Elkhart Lake iDMA 32-bit (PSE DMA) */
        { PCI_VDEVICE(INTEL, 0x4bb4), (kernel_ulong_t)&xbar_chip_pdata },
        { PCI_VDEVICE(INTEL, 0x4bb5), (kernel_ulong_t)&xbar_chip_pdata },
        { PCI_VDEVICE(INTEL, 0x4bb6), (kernel_ulong_t)&xbar_chip_pdata },

        /* Haswell */
        { PCI_VDEVICE(INTEL, 0x9c60), (kernel_ulong_t)&dw_dma_chip_pdata },

        /* Broadwell */
        { PCI_VDEVICE(INTEL, 0x9ce0), (kernel_ulong_t)&dw_dma_chip_pdata },

        { }
};
MODULE_DEVICE_TABLE(pci, dw_pci_id_table);

static struct pci_driver dw_pci_driver = {
        .name           = "dw_dmac_pci",
        .id_table       = dw_pci_id_table,
        .probe          = dw_pci_probe,
        .remove         = dw_pci_remove,
        .driver = {
                .pm     = pm_sleep_ptr(&dw_pci_dev_pm_ops),
        },
};

module_pci_driver(dw_pci_driver);

MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Synopsys DesignWare DMA Controller PCI driver");
MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");