1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 *
4 *  Copyright (C) 2012 John Crispin <john@phrozen.org>
5 */
6
7#include <linux/export.h>
8#include <linux/of_platform.h>
9#include <linux/of_gpio.h>
10#include <linux/dma-mapping.h>
11
12#include <lantiq_soc.h>
13
14static unsigned int *cp1_base;
15
16unsigned int *ltq_get_cp1_base(void)
17{
18	if (!cp1_base)
19		panic("no cp1 base was set\n");
20
21	return cp1_base;
22}
23EXPORT_SYMBOL(ltq_get_cp1_base);
24
25static int vmmc_probe(struct platform_device *pdev)
26{
27#define CP1_SIZE       (1 << 20)
28	int gpio_count;
29	dma_addr_t dma;
30
31	cp1_base =
32		(void *) CPHYSADDR(dma_alloc_coherent(&pdev->dev, CP1_SIZE,
33						    &dma, GFP_KERNEL));
34
35	gpio_count = of_gpio_count(pdev->dev.of_node);
36	while (gpio_count > 0) {
37		enum of_gpio_flags flags;
38		int gpio = of_get_gpio_flags(pdev->dev.of_node,
39					     --gpio_count, &flags);
40		if (gpio_request(gpio, "vmmc-relay"))
41			continue;
42		dev_info(&pdev->dev, "requested GPIO %d\n", gpio);
43		gpio_direction_output(gpio,
44				      (flags & OF_GPIO_ACTIVE_LOW) ? (0) : (1));
45	}
46
47	dev_info(&pdev->dev, "reserved %dMB at 0x%p", CP1_SIZE >> 20, cp1_base);
48
49	return 0;
50}
51
52static const struct of_device_id vmmc_match[] = {
53	{ .compatible = "lantiq,vmmc-xway" },
54	{},
55};
56
57static struct platform_driver vmmc_driver = {
58	.probe = vmmc_probe,
59	.driver = {
60		.name = "lantiq,vmmc",
61		.of_match_table = vmmc_match,
62	},
63};
64builtin_platform_driver(vmmc_driver);
65