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",
90 .type = TTY_DRIVER_TYPE_CONSOLE,
91 .subtype = SYSTEM_TYPE_CONSOLE,
92 .read_irq = CONSOLE_IRQ,
93 .read_irq_name = "console",
94 .write_irq = CONSOLE_WRITE_IRQ,
95 .write_irq_name = "console-write",
96 .symlink_from = "ttys",
100 .config = con_config,
101 .get_config = con_get_config,
102 .remove = con_remove,
106 static struct lines console_lines = LINES_INIT(MAX_TTYS);
108 /* The array is initialized by line_init, which is an initcall. The
109 * individual elements are protected by individual semaphores.
111 struct line vts[MAX_TTYS] = { LINE_INIT(CONFIG_CON_ZERO_CHAN, &driver),
112 [ 1 ... MAX_TTYS - 1 ] =
113 LINE_INIT(CONFIG_CON_CHAN, &driver) };
115 static int con_config(char *str)
117 return(line_config(vts, sizeof(vts)/sizeof(vts[0]), str));
120 static int con_get_config(char *dev, char *str, int size, char **error_out)
122 return(line_get_config(dev, vts, sizeof(vts)/sizeof(vts[0]), str,
126 static int con_remove(char *str)
128 return(line_remove(vts, sizeof(vts)/sizeof(vts[0]), str));
131 static int open_console(struct tty_struct *tty)
133 return(line_open(vts, tty, &opts));
136 static int con_open(struct tty_struct *tty, struct file *filp)
138 return(open_console(tty));
141 static void con_close(struct tty_struct *tty, struct file *filp)
143 line_close(vts, tty);
146 static int con_write(struct tty_struct *tty, int from_user,
147 const unsigned char *buf, int count)
149 return(line_write(vts, tty, from_user, buf, count));
152 static void set_termios(struct tty_struct *tty, struct termios * old)
156 static int chars_in_buffer(struct tty_struct *tty)
161 static int con_init_done = 0;
163 static struct tty_operations console_ops = {
167 .chars_in_buffer = chars_in_buffer,
168 .set_termios = set_termios,
169 .write_room = line_write_room,
176 printk(KERN_INFO "Initializing stdio console driver\n");
178 console_driver = line_register_devfs(&console_lines, &driver,
180 sizeof(vts)/sizeof(vts[0]));
182 lines_init(vts, sizeof(vts)/sizeof(vts[0]));
184 new_title = add_xterm_umid(opts.xterm_title);
185 if(new_title != NULL) opts.xterm_title = new_title;
192 late_initcall(stdio_init);
194 static void uml_console_write(struct console *console, const char *string,
197 struct line *line = &vts[console->index];
201 console_write_chan(&line->chan_list, string, len);
206 static struct tty_driver *uml_console_device(struct console *c, int *index)
209 return console_driver;
212 static int uml_console_setup(struct console *co, char *options)
217 static struct console stdiocons = {
219 write: uml_console_write,
220 device: uml_console_device,
221 setup: uml_console_setup,
222 flags: CON_PRINTBUFFER,
226 static int __init stdio_console_init(void)
228 INIT_LIST_HEAD(&vts[0].chan_list);
229 list_add(&init_console_chan.list, &vts[0].chan_list);
230 register_console(&stdiocons);
234 console_initcall(stdio_console_init);
236 static int console_chan_setup(char *str)
238 return(line_setup(vts, sizeof(vts)/sizeof(vts[0]), str, 1));
241 __setup("con", console_chan_setup);
242 __channel_help(console_chan_setup, "con");
244 static void console_exit(void)
246 if(!con_init_done) return;
247 close_lines(vts, sizeof(vts)/sizeof(vts[0]));
250 __uml_exitcall(console_exit);
253 * Overrides for Emacs so that we follow Linus's tabbing style.
254 * Emacs will notice this stuff at the end of the file and automatically
255 * adjust the settings for this buffer only. This must remain at the end
257 * ---------------------------------------------------------------------------
259 * c-file-style: "linux"