1 // SPDX-License-Identifier: GPL-2.0+
3 * udbg interface to hvc_console.c
5 * (C) Copyright David Gibson, IBM Corporation 2008.
8 #include <linux/console.h>
9 #include <linux/delay.h>
10 #include <linux/err.h>
11 #include <linux/init.h>
12 #include <linux/moduleparam.h>
13 #include <linux/types.h>
14 #include <linux/irq.h>
18 #include "hvc_console.h"
20 static struct hvc_struct *hvc_udbg_dev;
22 static ssize_t hvc_udbg_put(uint32_t vtermno, const u8 *buf, size_t count)
26 for (i = 0; i < count && udbg_putc; i++)
32 static ssize_t hvc_udbg_get(uint32_t vtermno, u8 *buf, size_t count)
40 for (i = 0; i < count; i++) {
41 if ((c = udbg_getc_poll()) == -1)
49 static const struct hv_ops hvc_udbg_ops = {
50 .get_chars = hvc_udbg_get,
51 .put_chars = hvc_udbg_put,
54 static int __init hvc_udbg_init(void)
56 struct hvc_struct *hp;
63 hp = hvc_alloc(0, 0, &hvc_udbg_ops, 16);
71 device_initcall(hvc_udbg_init);
73 static int __init hvc_udbg_console_init(void)
78 hvc_instantiate(0, 0, &hvc_udbg_ops);
79 add_preferred_console("hvc", 0, NULL);
83 console_initcall(hvc_udbg_console_init);