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
11 static 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
22 static 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
70 err_unregister_rtc_virtio:
71 while (i > 0)
72 platform_device_unregister(pdevs[--i]);
73 platform_device_unregister(pdev2);
74 err_unregister_tty:
75 platform_device_unregister(pdev1);
76
77 return ret;
78 }
79
80 arch_initcall(virt_platform_init);
81
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