1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * Copyright (C) 2012 John Crispin <john@phrozen.org>
5*4882a593Smuzhiyun */
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun #include <linux/export.h>
8*4882a593Smuzhiyun #include <linux/of_platform.h>
9*4882a593Smuzhiyun #include <linux/of_gpio.h>
10*4882a593Smuzhiyun #include <linux/dma-mapping.h>
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #include <lantiq_soc.h>
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun static unsigned int *cp1_base;
15*4882a593Smuzhiyun
ltq_get_cp1_base(void)16*4882a593Smuzhiyun unsigned int *ltq_get_cp1_base(void)
17*4882a593Smuzhiyun {
18*4882a593Smuzhiyun if (!cp1_base)
19*4882a593Smuzhiyun panic("no cp1 base was set\n");
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun return cp1_base;
22*4882a593Smuzhiyun }
23*4882a593Smuzhiyun EXPORT_SYMBOL(ltq_get_cp1_base);
24*4882a593Smuzhiyun
vmmc_probe(struct platform_device * pdev)25*4882a593Smuzhiyun static int vmmc_probe(struct platform_device *pdev)
26*4882a593Smuzhiyun {
27*4882a593Smuzhiyun #define CP1_SIZE (1 << 20)
28*4882a593Smuzhiyun int gpio_count;
29*4882a593Smuzhiyun dma_addr_t dma;
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun cp1_base =
32*4882a593Smuzhiyun (void *) CPHYSADDR(dma_alloc_coherent(&pdev->dev, CP1_SIZE,
33*4882a593Smuzhiyun &dma, GFP_KERNEL));
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun gpio_count = of_gpio_count(pdev->dev.of_node);
36*4882a593Smuzhiyun while (gpio_count > 0) {
37*4882a593Smuzhiyun enum of_gpio_flags flags;
38*4882a593Smuzhiyun int gpio = of_get_gpio_flags(pdev->dev.of_node,
39*4882a593Smuzhiyun --gpio_count, &flags);
40*4882a593Smuzhiyun if (gpio_request(gpio, "vmmc-relay"))
41*4882a593Smuzhiyun continue;
42*4882a593Smuzhiyun dev_info(&pdev->dev, "requested GPIO %d\n", gpio);
43*4882a593Smuzhiyun gpio_direction_output(gpio,
44*4882a593Smuzhiyun (flags & OF_GPIO_ACTIVE_LOW) ? (0) : (1));
45*4882a593Smuzhiyun }
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun dev_info(&pdev->dev, "reserved %dMB at 0x%p", CP1_SIZE >> 20, cp1_base);
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun return 0;
50*4882a593Smuzhiyun }
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun static const struct of_device_id vmmc_match[] = {
53*4882a593Smuzhiyun { .compatible = "lantiq,vmmc-xway" },
54*4882a593Smuzhiyun {},
55*4882a593Smuzhiyun };
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun static struct platform_driver vmmc_driver = {
58*4882a593Smuzhiyun .probe = vmmc_probe,
59*4882a593Smuzhiyun .driver = {
60*4882a593Smuzhiyun .name = "lantiq,vmmc",
61*4882a593Smuzhiyun .of_match_table = vmmc_match,
62*4882a593Smuzhiyun },
63*4882a593Smuzhiyun };
64*4882a593Smuzhiyun builtin_platform_driver(vmmc_driver);
65