1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Platform dependent support for HP simulator.
4 *
5 * Copyright (C) 1998, 1999, 2002 Hewlett-Packard Co
6 * David Mosberger-Tang <davidm@hpl.hp.com>
7 * Copyright (C) 1999 Vijay Chander <vijay@engr.sgi.com>
8 */
9
10 #include <linux/init.h>
11 #include <linux/kernel.h>
12 #include <linux/param.h>
13 #include <linux/string.h>
14 #include <linux/types.h>
15 #include <linux/tty.h>
16 #include <linux/kdev_t.h>
17 #include <linux/console.h>
18
19 #include <asm/delay.h>
20 #include <asm/irq.h>
21 #include <asm/pal.h>
22 #include <asm/machvec.h>
23 #include <asm/pgtable.h>
24 #include <asm/sal.h>
25 #include <asm/hpsim.h>
26
27 #include "hpsim_ssc.h"
28
29 static int simcons_init (struct console *, char *);
30 static void simcons_write (struct console *, const char *, unsigned);
31 static struct tty_driver *simcons_console_device (struct console *, int *);
32
33 static struct console hpsim_cons = {
34 .name = "simcons",
35 .write = simcons_write,
36 .device = simcons_console_device,
37 .setup = simcons_init,
38 .flags = CON_PRINTBUFFER,
39 .index = -1,
40 };
41
42 static int
simcons_init(struct console * cons,char * options)43 simcons_init (struct console *cons, char *options)
44 {
45 return 0;
46 }
47
48 static void
simcons_write(struct console * cons,const char * buf,unsigned count)49 simcons_write (struct console *cons, const char *buf, unsigned count)
50 {
51 unsigned long ch;
52
53 while (count-- > 0) {
54 ch = *buf++;
55 ia64_ssc(ch, 0, 0, 0, SSC_PUTCHAR);
56 if (ch == '\n')
57 ia64_ssc('\r', 0, 0, 0, SSC_PUTCHAR);
58 }
59 }
60
simcons_console_device(struct console * c,int * index)61 static struct tty_driver *simcons_console_device (struct console *c, int *index)
62 {
63 *index = c->index;
64 return hp_simserial_driver;
65 }
66
simcons_register(void)67 int simcons_register(void)
68 {
69 if (!ia64_platform_is("hpsim"))
70 return 1;
71
72 if (hpsim_cons.flags & CON_ENABLED)
73 return 1;
74
75 register_console(&hpsim_cons);
76 return 0;
77 }
78
