1// SPDX-License-Identifier: GPL-2.0
2
3#include <linux/platform_device.h>
4#include <linux/interrupt.h>
5#include <linux/memblock.h>
6#include <asm/virt.h>
7#include <asm/irq.h>
8
9#define VIRTIO_BUS_NB	128
10
11static struct platform_device * __init virt_virtio_init(unsigned int id)
12{
13	const struct resource res[] = {
14		DEFINE_RES_MEM(virt_bi_data.virtio.mmio + id * 0x200, 0x200),
15		DEFINE_RES_IRQ(virt_bi_data.virtio.irq + id),
16	};
17
18	return platform_device_register_simple("virtio-mmio", id,
19					       res, ARRAY_SIZE(res));
20}
21
22static int __init virt_platform_init(void)
23{
24	const struct resource goldfish_tty_res[] = {
25		DEFINE_RES_MEM(virt_bi_data.tty.mmio, 1),
26		DEFINE_RES_IRQ(virt_bi_data.tty.irq),
27	};
28	/* this is the second gf-rtc, the first one is used by the scheduler */
29	const struct resource goldfish_rtc_res[] = {
30		DEFINE_RES_MEM(virt_bi_data.rtc.mmio + 0x1000, 0x1000),
31		DEFINE_RES_IRQ(virt_bi_data.rtc.irq + 1),
32	};
33	struct platform_device *pdev1, *pdev2;
34	struct platform_device *pdevs[VIRTIO_BUS_NB];
35	unsigned int i;
36	int ret = 0;
37
38	if (!MACH_IS_VIRT)
39		return -ENODEV;
40
41	/* We need this to have DMA'able memory provided to goldfish-tty */
42	min_low_pfn = 0;
43
44	pdev1 = platform_device_register_simple("goldfish_tty",
45						PLATFORM_DEVID_NONE,
46						goldfish_tty_res,
47						ARRAY_SIZE(goldfish_tty_res));
48	if (IS_ERR(pdev1))
49		return PTR_ERR(pdev1);
50
51	pdev2 = platform_device_register_simple("goldfish_rtc",
52						PLATFORM_DEVID_NONE,
53						goldfish_rtc_res,
54						ARRAY_SIZE(goldfish_rtc_res));
55	if (IS_ERR(pdev2)) {
56		ret = PTR_ERR(pdev2);
57		goto err_unregister_tty;
58	}
59
60	for (i = 0; i < VIRTIO_BUS_NB; i++) {
61		pdevs[i] = virt_virtio_init(i);
62		if (IS_ERR(pdevs[i])) {
63			ret = PTR_ERR(pdevs[i]);
64			goto err_unregister_rtc_virtio;
65		}
66	}
67
68	return 0;
69
70err_unregister_rtc_virtio:
71	while (i > 0)
72		platform_device_unregister(pdevs[--i]);
73	platform_device_unregister(pdev2);
74err_unregister_tty:
75	platform_device_unregister(pdev1);
76
77	return ret;
78}
79
80arch_initcall(virt_platform_init);
81