2 * Copyright (C) 2000, 2001 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
6 #include "linux/config.h"
7 #include "linux/posix_types.h"
9 #include "linux/tty_flip.h"
10 #include "linux/types.h"
11 #include "linux/major.h"
12 #include "linux/kdev_t.h"
13 #include "linux/console.h"
14 #include "linux/string.h"
15 #include "linux/sched.h"
16 #include "linux/list.h"
17 #include "linux/init.h"
18 #include "linux/interrupt.h"
19 #include "linux/slab.h"
20 #include "asm/current.h"
21 #include "asm/hardirq.h"
23 #include "stdio_console.h"
25 #include "chan_kern.h"
26 #include "user_util.h"
27 #include "kern_util.h"
29 #include "mconsole_kern.h"
31 #include "2_5compat.h"
35 /* Referenced only by tty_driver below - presumably it's locked correctly
39 static struct tty_driver *console_driver;
41 static struct chan_ops init_console_ops = {
42 .type = "you shouldn't see this",
48 .console_write = generic_write,
54 static struct chan init_console_chan = {
62 .ops = &init_console_ops,
66 void stdio_announce(char *dev_name, int dev)
68 printk(KERN_INFO "Virtual console %d assigned device '%s'\n", dev,
72 static struct chan_opts opts = {
73 .announce = stdio_announce,
74 .xterm_title = "Virtual Console #%d",
80 static int con_config(char *str);
81 static int con_get_config(char *dev, char *str, int size, char **error_out);
82 static int con_remove(char *str);
84 static struct line_driver driver = {
85 .name = "UML console",
86 .devfs_name = "vc/%d",
89 .type = TTY_DRIVER_TYPE_CONSOLE,
90 .subtype = SYSTEM_TYPE_CONSOLE,
91 .read_irq = CONSOLE_IRQ,
92 .read_irq_name = "console",
93 .write_irq = CONSOLE_WRITE_IRQ,
94 .write_irq_name = "console-write",
95 .symlink_from = "ttys",
100 .get_config = con_get_config,
101 .remove = con_remove,
105 static struct lines console_lines = LINES_INIT(MAX_TTYS);
107 /* The array is initialized by line_init, which is an initcall. The
108 * individual elements are protected by individual semaphores.
110 struct line vts[MAX_TTYS] = { LINE_INIT(CONFIG_CON_ZERO_CHAN, &driver),
111 [ 1 ... MAX_TTYS - 1 ] =
112 LINE_INIT(CONFIG_CON_CHAN, &driver) };
114 static int con_config(char *str)
116 return(line_config(vts, sizeof(vts)/sizeof(vts[0]), str));
119 static int con_get_config(char *dev, char *str, int size, char **error_out)
121 return(line_get_config(dev, vts, sizeof(vts)/sizeof(vts[0]), str,
125 static int con_remove(char *str)
127 return(line_remove(vts, sizeof(vts)/sizeof(vts[0]), str));
130 static int open_console(struct tty_struct *tty)
132 return(line_open(vts, tty, &opts));
135 static int con_open(struct tty_struct *tty, struct file *filp)
137 return(open_console(tty));
140 static void con_close(struct tty_struct *tty, struct file *filp)
142 line_close(vts, tty);
145 static int con_write(struct tty_struct *tty, int from_user,
146 const unsigned char *buf, int count)
148 return(line_write(vts, tty, from_user, buf, count));
151 static void set_termios(struct tty_struct *tty, struct termios * old)
155 static int chars_in_buffer(struct tty_struct *tty)
160 static int con_init_done = 0;
166 printk(KERN_INFO "Initializing stdio console driver\n");
168 console_driver = line_register_devfs(&console_lines, &driver,
169 &console_ops, vts, sizeof(vts)/sizeof(vts[0]));
171 lines_init(vts, sizeof(vts)/sizeof(vts[0]));
173 new_title = add_xterm_umid(opts.xterm_title);
174 if(new_title != NULL) opts.xterm_title = new_title;
181 __initcall(stdio_init);
183 static void console_write(struct console *console, const char *string,
186 if(con_init_done) down(&vts[console->index].sem);
187 console_write_chan(&vts[console->index].chan_list, string, len);
188 if(con_init_done) up(&vts[console->index].sem);
191 static struct tty_operations console_ops = {
195 .chars_in_buffer = chars_in_buffer,
196 .set_termios = set_termios,
197 .write_room = line_write_room,
200 static struct tty_driver *console_device(struct console *c, int *index)
203 return console_driver;
206 static int console_setup(struct console *co, char *options)
211 static struct console stdiocons = INIT_CONSOLE("tty", console_write,
212 console_device, console_setup,
215 static void __init stdio_console_init(void)
217 INIT_LIST_HEAD(&vts[0].chan_list);
218 list_add(&init_console_chan.list, &vts[0].chan_list);
219 register_console(&stdiocons);
221 console_initcall(stdio_console_init);
223 static int console_chan_setup(char *str)
225 line_setup(vts, sizeof(vts)/sizeof(vts[0]), str, 1);
229 __setup("con", console_chan_setup);
230 __channel_help(console_chan_setup, "con");
232 static void console_exit(void)
234 if(!con_init_done) return;
235 close_lines(vts, sizeof(vts)/sizeof(vts[0]));
238 __uml_exitcall(console_exit);
241 * Overrides for Emacs so that we follow Linus's tabbing style.
242 * Emacs will notice this stuff at the end of the file and automatically
243 * adjust the settings for this buffer only. This must remain at the end
245 * ---------------------------------------------------------------------------
247 * c-file-style: "linux"