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- // SPDX-License-Identifier: GPL-2.0
- #include <linux/platform_device.h>
- #include <linux/interrupt.h>
- #include <linux/memblock.h>
- #include <asm/virt.h>
- #include <asm/irq.h>
- #define VIRTIO_BUS_NB 128
- static struct platform_device * __init virt_virtio_init(unsigned int id)
- {
- const struct resource res[] = {
- DEFINE_RES_MEM(virt_bi_data.virtio.mmio + id * 0x200, 0x200),
- DEFINE_RES_IRQ(virt_bi_data.virtio.irq + id),
- };
- return platform_device_register_simple("virtio-mmio", id,
- res, ARRAY_SIZE(res));
- }
- static int __init virt_platform_init(void)
- {
- const struct resource goldfish_tty_res[] = {
- DEFINE_RES_MEM(virt_bi_data.tty.mmio, 1),
- DEFINE_RES_IRQ(virt_bi_data.tty.irq),
- };
- /* this is the second gf-rtc, the first one is used by the scheduler */
- const struct resource goldfish_rtc_res[] = {
- DEFINE_RES_MEM(virt_bi_data.rtc.mmio + 0x1000, 0x1000),
- DEFINE_RES_IRQ(virt_bi_data.rtc.irq + 1),
- };
- struct platform_device *pdev1, *pdev2;
- struct platform_device *pdevs[VIRTIO_BUS_NB];
- unsigned int i;
- int ret = 0;
- if (!MACH_IS_VIRT)
- return -ENODEV;
- /* We need this to have DMA'able memory provided to goldfish-tty */
- min_low_pfn = 0;
- pdev1 = platform_device_register_simple("goldfish_tty",
- PLATFORM_DEVID_NONE,
- goldfish_tty_res,
- ARRAY_SIZE(goldfish_tty_res));
- if (IS_ERR(pdev1))
- return PTR_ERR(pdev1);
- pdev2 = platform_device_register_simple("goldfish_rtc",
- PLATFORM_DEVID_NONE,
- goldfish_rtc_res,
- ARRAY_SIZE(goldfish_rtc_res));
- if (IS_ERR(pdev2)) {
- ret = PTR_ERR(pdev2);
- goto err_unregister_tty;
- }
- for (i = 0; i < VIRTIO_BUS_NB; i++) {
- pdevs[i] = virt_virtio_init(i);
- if (IS_ERR(pdevs[i])) {
- ret = PTR_ERR(pdevs[i]);
- goto err_unregister_rtc_virtio;
- }
- }
- return 0;
- err_unregister_rtc_virtio:
- while (i > 0)
- platform_device_unregister(pdevs[--i]);
- platform_device_unregister(pdev2);
- err_unregister_tty:
- platform_device_unregister(pdev1);
- return ret;
- }
- arch_initcall(virt_platform_init);
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