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 "linux/hardirq.h"
21 #include "asm/current.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"
34 /* ----------------------------------------------------------------------------- */
36 /* Referenced only by tty_driver below - presumably it's locked correctly
40 static struct tty_driver
*console_driver
;
42 void stdio_announce(char *dev_name
, int dev
)
44 printk(KERN_INFO
"Virtual console %d assigned device '%s'\n", dev
,
48 static struct chan_opts opts
= {
49 .announce
= stdio_announce
,
50 .xterm_title
= "Virtual Console #%d",
56 static int con_config(char *str
);
57 static int con_get_config(char *dev
, char *str
, int size
, char **error_out
);
58 static int con_remove(int n
);
60 static struct line_driver driver
= {
61 .name
= "UML console",
66 .type
= TTY_DRIVER_TYPE_CONSOLE
,
67 .subtype
= SYSTEM_TYPE_CONSOLE
,
68 .read_irq
= CONSOLE_IRQ
,
69 .read_irq_name
= "console",
70 .write_irq
= CONSOLE_WRITE_IRQ
,
71 .write_irq_name
= "console-write",
72 .symlink_from
= "ttys",
77 .get_config
= con_get_config
,
83 static struct lines console_lines
= LINES_INIT(MAX_TTYS
);
85 /* The array is initialized by line_init, which is an initcall. The
86 * individual elements are protected by individual semaphores.
88 struct line vts
[MAX_TTYS
] = { LINE_INIT(CONFIG_CON_ZERO_CHAN
, &driver
),
89 [ 1 ... MAX_TTYS
- 1 ] =
90 LINE_INIT(CONFIG_CON_CHAN
, &driver
) };
92 static int con_config(char *str
)
94 return line_config(vts
, ARRAY_SIZE(vts
), str
, &opts
);
97 static int con_get_config(char *dev
, char *str
, int size
, char **error_out
)
99 return line_get_config(dev
, vts
, ARRAY_SIZE(vts
), str
, size
, error_out
);
102 static int con_remove(int n
)
104 return line_remove(vts
, ARRAY_SIZE(vts
), n
);
107 static int con_open(struct tty_struct
*tty
, struct file
*filp
)
109 return line_open(vts
, tty
);
112 static int con_init_done
= 0;
114 static struct tty_operations console_ops
= {
118 .put_char
= line_put_char
,
119 .write_room
= line_write_room
,
120 .chars_in_buffer
= line_chars_in_buffer
,
121 .flush_buffer
= line_flush_buffer
,
122 .flush_chars
= line_flush_chars
,
123 .set_termios
= line_set_termios
,
125 .throttle
= line_throttle
,
126 .unthrottle
= line_unthrottle
,
129 static void uml_console_write(struct console
*console
, const char *string
,
132 struct line
*line
= &vts
[console
->index
];
135 spin_lock_irqsave(&line
->lock
, flags
);
136 console_write_chan(&line
->chan_list
, string
, len
);
137 spin_unlock_irqrestore(&line
->lock
, flags
);
140 static struct tty_driver
*uml_console_device(struct console
*c
, int *index
)
143 return console_driver
;
146 static int uml_console_setup(struct console
*co
, char *options
)
148 struct line
*line
= &vts
[co
->index
];
150 return console_open_chan(line
, co
, &opts
);
153 static struct console stdiocons
= {
155 .write
= uml_console_write
,
156 .device
= uml_console_device
,
157 .setup
= uml_console_setup
,
158 .flags
= CON_PRINTBUFFER
,
167 console_driver
= line_register_devfs(&console_lines
, &driver
,
170 if (console_driver
== NULL
)
172 printk(KERN_INFO
"Initialized stdio console driver\n");
174 lines_init(vts
, ARRAY_SIZE(vts
), &opts
);
176 new_title
= add_xterm_umid(opts
.xterm_title
);
177 if(new_title
!= NULL
)
178 opts
.xterm_title
= new_title
;
181 register_console(&stdiocons
);
184 late_initcall(stdio_init
);
186 static void console_exit(void)
190 close_lines(vts
, ARRAY_SIZE(vts
));
192 __uml_exitcall(console_exit
);
194 static int console_chan_setup(char *str
)
196 return line_setup(vts
, ARRAY_SIZE(vts
), str
);
198 __setup("con", console_chan_setup
);
199 __channel_help(console_chan_setup
, "con");