1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/init.h>
3 #include <linux/errno.h>
4 #include <linux/console.h>
5
6 #include <asm/sibyte/board.h>
7
8 #include <asm/fw/cfe/cfe_api.h>
9 #include <asm/fw/cfe/cfe_error.h>
10
11 extern int cfe_cons_handle;
12
13 static void cfe_console_write(struct console *cons, const char *str,
14 unsigned int count)
15 {
16 int i, last, written;
17
18 for (i=0, last=0; i<count; i++) {
19 if (!str[i])
20 /* XXXKW can/should this ever happen? */
21 return;
22 if (str[i] == '\n') {
23 do {
24 written = cfe_write(cfe_cons_handle, &str[last], i-last);
25 if (written < 0)
26 ;
27 last += written;
28 } while (last < i);
29 while (cfe_write(cfe_cons_handle, "\r", 1) <= 0)
30 ;
31 }
32 }
33 if (last != count) {
34 do {
35 written = cfe_write(cfe_cons_handle, &str[last], count-last);
36 if (written < 0)
37 ;
38 last += written;
39 } while (last < count);
40 }
41
42 }
43
44 static int cfe_console_setup(struct console *cons, char *str)
45 {
46 char consdev[32];
47 /* XXXKW think about interaction with 'console=' cmdline arg */
48 /* If none of the console options are configured, the build will break. */
49 if (cfe_getenv("BOOT_CONSOLE", consdev, 32) >= 0) {
50 #ifdef CONFIG_SERIAL_SB1250_DUART
51 if (!strcmp(consdev, "uart0")) {
52 setleds("u0cn");
53 } else if (!strcmp(consdev, "uart1")) {
54 setleds("u1cn");
55 } else
56 #endif
57 #ifdef CONFIG_VGA_CONSOLE
58 if (!strcmp(consdev, "pcconsole0")) {
59 setleds("pccn");
60 } else
61 #endif
62 return -ENODEV;
63 }
64 return 0;
65 }
66
67 static struct console sb1250_cfe_cons = {
68 .name = "cfe",
69 .write = cfe_console_write,
70 .setup = cfe_console_setup,
71 .flags = CON_PRINTBUFFER,
72 .index = -1,
73 };
74
75 static int __init sb1250_cfe_console_init(void)
76 {
77 register_console(&sb1250_cfe_cons);
78 return 0;
79 }
80
81 console_initcall(sb1250_cfe_console_init);
82
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