// SPDX-License-Identifier: GPL-2.0-only
/*
 *
 *  Copyright (C) 2012 John Crispin <john@phrozen.org>
 */

#include <linux/err.h>
#include <linux/export.h>
#include <linux/gpio/consumer.h>
#include <linux/mod_devicetable.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>

#include <lantiq_soc.h>

static unsigned int *cp1_base;

unsigned int *ltq_get_cp1_base(void)
{
        if (!cp1_base)
                panic("no cp1 base was set\n");

        return cp1_base;
}
EXPORT_SYMBOL(ltq_get_cp1_base);

static int vmmc_probe(struct platform_device *pdev)
{
#define CP1_SIZE       (1 << 20)
        struct gpio_desc *gpio;
        int gpio_count;
        dma_addr_t dma;
        int error;

        cp1_base =
                (void *) CPHYSADDR(dma_alloc_coherent(&pdev->dev, CP1_SIZE,
                                                    &dma, GFP_KERNEL));

        gpio_count = gpiod_count(&pdev->dev, NULL);
        while (gpio_count > 0) {
                gpio = devm_gpiod_get_index(&pdev->dev,
                                            NULL, --gpio_count, GPIOD_OUT_HIGH);
                error = PTR_ERR_OR_ZERO(gpio);
                if (error) {
                        dev_err(&pdev->dev,
                                "failed to request GPIO idx %d: %d\n",
                                gpio_count, error);
                        continue;
                }

                gpiod_set_consumer_name(gpio, "vmmc-relay");
        }

        dev_info(&pdev->dev, "reserved %dMB at 0x%p", CP1_SIZE >> 20, cp1_base);

        return 0;
}

static const struct of_device_id vmmc_match[] = {
        { .compatible = "lantiq,vmmc-xway" },
        {},
};

static struct platform_driver vmmc_driver = {
        .probe = vmmc_probe,
        .driver = {
                .name = "lantiq,vmmc",
                .of_match_table = vmmc_match,
        },
};
builtin_platform_driver(vmmc_driver);