diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/mips/cobalt/promcon.c |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/mips/cobalt/promcon.c')
-rw-r--r-- | arch/mips/cobalt/promcon.c | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/arch/mips/cobalt/promcon.c b/arch/mips/cobalt/promcon.c new file mode 100644 index 000000000000..f03df761e9f1 --- /dev/null +++ b/arch/mips/cobalt/promcon.c | |||
@@ -0,0 +1,87 @@ | |||
1 | /* | ||
2 | * PROM console for Cobalt Raq2 | ||
3 | * | ||
4 | * This file is subject to the terms and conditions of the GNU General Public | ||
5 | * License. See the file "COPYING" in the main directory of this archive | ||
6 | * for more details. | ||
7 | * | ||
8 | * Copyright (C) 1995, 1996, 1997 by Ralf Baechle | ||
9 | * Copyright (C) 2001 by Liam Davies (ldavies@agile.tv) | ||
10 | * | ||
11 | */ | ||
12 | |||
13 | #include <linux/init.h> | ||
14 | #include <linux/console.h> | ||
15 | #include <linux/kdev_t.h> | ||
16 | #include <linux/serial_reg.h> | ||
17 | |||
18 | #include <asm/delay.h> | ||
19 | #include <asm/serial.h> | ||
20 | #include <asm/io.h> | ||
21 | |||
22 | static unsigned long port = 0xc800000; | ||
23 | |||
24 | static __inline__ void ns16550_cons_put_char(char ch, unsigned long ioaddr) | ||
25 | { | ||
26 | char lsr; | ||
27 | |||
28 | do { | ||
29 | lsr = inb(ioaddr + UART_LSR); | ||
30 | } while ((lsr & (UART_LSR_TEMT | UART_LSR_THRE)) != (UART_LSR_TEMT | UART_LSR_THRE)); | ||
31 | outb(ch, ioaddr + UART_TX); | ||
32 | } | ||
33 | |||
34 | static __inline__ char ns16550_cons_get_char(unsigned long ioaddr) | ||
35 | { | ||
36 | while ((inb(ioaddr + UART_LSR) & UART_LSR_DR) == 0) | ||
37 | udelay(1); | ||
38 | return inb(ioaddr + UART_RX); | ||
39 | } | ||
40 | |||
41 | void ns16550_console_write(struct console *co, const char *s, unsigned count) | ||
42 | { | ||
43 | char lsr, ier; | ||
44 | unsigned i; | ||
45 | |||
46 | ier = inb(port + UART_IER); | ||
47 | outb(0x00, port + UART_IER); | ||
48 | for (i=0; i < count; i++, s++) { | ||
49 | |||
50 | if(*s == '\n') | ||
51 | ns16550_cons_put_char('\r', port); | ||
52 | ns16550_cons_put_char(*s, port); | ||
53 | } | ||
54 | |||
55 | do { | ||
56 | lsr = inb(port + UART_LSR); | ||
57 | } while ((lsr & (UART_LSR_TEMT | UART_LSR_THRE)) != (UART_LSR_TEMT | UART_LSR_THRE)); | ||
58 | |||
59 | outb(ier, port + UART_IER); | ||
60 | } | ||
61 | |||
62 | char getDebugChar(void) | ||
63 | { | ||
64 | return ns16550_cons_get_char(port); | ||
65 | } | ||
66 | |||
67 | void putDebugChar(char kgdb_char) | ||
68 | { | ||
69 | ns16550_cons_put_char(kgdb_char, port); | ||
70 | } | ||
71 | |||
72 | static struct console ns16550_console = { | ||
73 | .name = "prom", | ||
74 | .setup = NULL, | ||
75 | .write = ns16550_console_write, | ||
76 | .flags = CON_PRINTBUFFER, | ||
77 | .index = -1, | ||
78 | }; | ||
79 | |||
80 | static int __init ns16550_setup_console(void) | ||
81 | { | ||
82 | register_console(&ns16550_console); | ||
83 | |||
84 | return 0; | ||
85 | } | ||
86 | |||
87 | console_initcall(ns16550_setup_console); | ||