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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Copyright (C) 2000, 2001 Jeff Dike (jdike@karaya.com) | |
3 | * Licensed under the GPL | |
4 | */ | |
5 | ||
1da177e4 LT |
6 | #include "linux/posix_types.h" |
7 | #include "linux/tty.h" | |
8 | #include "linux/tty_flip.h" | |
9 | #include "linux/types.h" | |
10 | #include "linux/major.h" | |
11 | #include "linux/kdev_t.h" | |
12 | #include "linux/console.h" | |
13 | #include "linux/string.h" | |
14 | #include "linux/sched.h" | |
15 | #include "linux/list.h" | |
16 | #include "linux/init.h" | |
17 | #include "linux/interrupt.h" | |
18 | #include "linux/slab.h" | |
19 | #include "linux/hardirq.h" | |
20 | #include "asm/current.h" | |
21 | #include "asm/irq.h" | |
22 | #include "stdio_console.h" | |
510c72a3 | 23 | #include "chan.h" |
1da177e4 LT |
24 | #include "irq_user.h" |
25 | #include "mconsole_kern.h" | |
26 | #include "init.h" | |
1da177e4 LT |
27 | |
28 | #define MAX_TTYS (16) | |
29 | ||
074a0db8 | 30 | static void stdio_announce(char *dev_name, int dev) |
1da177e4 LT |
31 | { |
32 | printk(KERN_INFO "Virtual console %d assigned device '%s'\n", dev, | |
33 | dev_name); | |
34 | } | |
35 | ||
a52f362f | 36 | /* Almost const, except that xterm_title may be changed in an initcall */ |
1da177e4 LT |
37 | static struct chan_opts opts = { |
38 | .announce = stdio_announce, | |
39 | .xterm_title = "Virtual Console #%d", | |
40 | .raw = 1, | |
1da177e4 LT |
41 | }; |
42 | ||
f28169d2 | 43 | static int con_config(char *str, char **error_out); |
1da177e4 | 44 | static int con_get_config(char *dev, char *str, int size, char **error_out); |
f28169d2 | 45 | static int con_remove(int n, char **con_remove); |
1da177e4 | 46 | |
d5c9ffc6 JD |
47 | |
48 | /* Const, except for .mc.list */ | |
1da177e4 LT |
49 | static struct line_driver driver = { |
50 | .name = "UML console", | |
51 | .device_name = "tty", | |
1da177e4 LT |
52 | .major = TTY_MAJOR, |
53 | .minor_start = 0, | |
54 | .type = TTY_DRIVER_TYPE_CONSOLE, | |
55 | .subtype = SYSTEM_TYPE_CONSOLE, | |
56 | .read_irq = CONSOLE_IRQ, | |
57 | .read_irq_name = "console", | |
58 | .write_irq = CONSOLE_WRITE_IRQ, | |
59 | .write_irq_name = "console-write", | |
1da177e4 | 60 | .mc = { |
c0961c18 | 61 | .list = LIST_HEAD_INIT(driver.mc.list), |
1da177e4 LT |
62 | .name = "con", |
63 | .config = con_config, | |
64 | .get_config = con_get_config, | |
d50084a2 | 65 | .id = line_id, |
1da177e4 LT |
66 | .remove = con_remove, |
67 | }, | |
68 | }; | |
69 | ||
d5c9ffc6 JD |
70 | /* The array is initialized by line_init, at initcall time. The |
71 | * elements are locked individually as needed. | |
1da177e4 | 72 | */ |
43574c1a AV |
73 | static char *vt_conf[MAX_TTYS]; |
74 | static char *def_conf; | |
75 | static struct line vts[MAX_TTYS]; | |
1da177e4 | 76 | |
f28169d2 | 77 | static int con_config(char *str, char **error_out) |
1da177e4 | 78 | { |
f28169d2 | 79 | return line_config(vts, ARRAY_SIZE(vts), str, &opts, error_out); |
1da177e4 LT |
80 | } |
81 | ||
82 | static int con_get_config(char *dev, char *str, int size, char **error_out) | |
83 | { | |
0834cc77 | 84 | return line_get_config(dev, vts, ARRAY_SIZE(vts), str, size, error_out); |
1da177e4 LT |
85 | } |
86 | ||
f28169d2 | 87 | static int con_remove(int n, char **error_out) |
1da177e4 | 88 | { |
f28169d2 | 89 | return line_remove(vts, ARRAY_SIZE(vts), n, error_out); |
1da177e4 LT |
90 | } |
91 | ||
92 | static int con_open(struct tty_struct *tty, struct file *filp) | |
93 | { | |
d14ad81f JD |
94 | int err = line_open(vts, tty); |
95 | if (err) | |
96 | printk(KERN_ERR "Failed to open console %d, err = %d\n", | |
97 | tty->index, err); | |
98 | ||
99 | return err; | |
1da177e4 LT |
100 | } |
101 | ||
730760e9 | 102 | /* Set in an initcall, checked in an exitcall */ |
1da177e4 LT |
103 | static int con_init_done = 0; |
104 | ||
5e7672ec | 105 | static const struct tty_operations console_ops = { |
1da177e4 LT |
106 | .open = con_open, |
107 | .close = line_close, | |
108 | .write = line_write, | |
b97b77cc | 109 | .put_char = line_put_char, |
d50084a2 | 110 | .write_room = line_write_room, |
1da177e4 | 111 | .chars_in_buffer = line_chars_in_buffer, |
b97b77cc PBG |
112 | .flush_buffer = line_flush_buffer, |
113 | .flush_chars = line_flush_chars, | |
1da177e4 LT |
114 | .set_termios = line_set_termios, |
115 | .ioctl = line_ioctl, | |
e4dcee80 JD |
116 | .throttle = line_throttle, |
117 | .unthrottle = line_unthrottle, | |
1da177e4 LT |
118 | }; |
119 | ||
120 | static void uml_console_write(struct console *console, const char *string, | |
d50084a2 | 121 | unsigned len) |
1da177e4 LT |
122 | { |
123 | struct line *line = &vts[console->index]; | |
b97b77cc | 124 | unsigned long flags; |
1da177e4 | 125 | |
b97b77cc | 126 | spin_lock_irqsave(&line->lock, flags); |
1da177e4 | 127 | console_write_chan(&line->chan_list, string, len); |
b97b77cc | 128 | spin_unlock_irqrestore(&line->lock, flags); |
1da177e4 LT |
129 | } |
130 | ||
131 | static struct tty_driver *uml_console_device(struct console *c, int *index) | |
132 | { | |
133 | *index = c->index; | |
cfe6b7c7 | 134 | return driver.driver; |
1da177e4 LT |
135 | } |
136 | ||
137 | static int uml_console_setup(struct console *co, char *options) | |
138 | { | |
139 | struct line *line = &vts[co->index]; | |
140 | ||
a52f362f | 141 | return console_open_chan(line, co); |
1da177e4 LT |
142 | } |
143 | ||
d5c9ffc6 | 144 | /* No locking for register_console call - relies on single-threaded initcalls */ |
1da177e4 LT |
145 | static struct console stdiocons = { |
146 | .name = "tty", | |
147 | .write = uml_console_write, | |
148 | .device = uml_console_device, | |
149 | .setup = uml_console_setup, | |
b5337885 | 150 | .flags = CON_PRINTBUFFER|CON_ANYTIME, |
1da177e4 | 151 | .index = -1, |
1da177e4 LT |
152 | }; |
153 | ||
074a0db8 | 154 | static int stdio_init(void) |
1da177e4 LT |
155 | { |
156 | char *new_title; | |
cfe6b7c7 | 157 | int err; |
43574c1a AV |
158 | int i; |
159 | ||
160 | for (i = 0; i < MAX_TTYS; i++) { | |
161 | char *s = vt_conf[i]; | |
162 | if (!s) | |
163 | s = def_conf; | |
164 | if (!s) | |
165 | s = i ? CONFIG_CON_CHAN : CONFIG_CON_ZERO_CHAN; | |
cfe6b7c7 | 166 | if (s && strcmp(s, "none") != 0) |
43574c1a | 167 | vts[i].init_str = s; |
43574c1a | 168 | spin_lock_init(&vts[i].lock); |
d8c215ad | 169 | mutex_init(&vts[i].count_lock); |
43574c1a AV |
170 | vts[i].driver = &driver; |
171 | } | |
cfe6b7c7 | 172 | err = register_lines(&driver, &console_ops, vts, |
d5c9ffc6 | 173 | ARRAY_SIZE(vts)); |
cfe6b7c7 AV |
174 | if (err) |
175 | return err; | |
1da177e4 LT |
176 | printk(KERN_INFO "Initialized stdio console driver\n"); |
177 | ||
1da177e4 LT |
178 | new_title = add_xterm_umid(opts.xterm_title); |
179 | if(new_title != NULL) | |
180 | opts.xterm_title = new_title; | |
181 | ||
57ac895a DB |
182 | lines_init(vts, ARRAY_SIZE(vts), &opts); |
183 | ||
1da177e4 LT |
184 | con_init_done = 1; |
185 | register_console(&stdiocons); | |
d50084a2 | 186 | return 0; |
1da177e4 LT |
187 | } |
188 | late_initcall(stdio_init); | |
189 | ||
190 | static void console_exit(void) | |
191 | { | |
192 | if (!con_init_done) | |
193 | return; | |
0834cc77 | 194 | close_lines(vts, ARRAY_SIZE(vts)); |
1da177e4 LT |
195 | } |
196 | __uml_exitcall(console_exit); | |
197 | ||
198 | static int console_chan_setup(char *str) | |
199 | { | |
43574c1a | 200 | line_setup(vt_conf, MAX_TTYS, &def_conf, str, "console"); |
f28169d2 | 201 | return 1; |
1da177e4 LT |
202 | } |
203 | __setup("con", console_chan_setup); | |
204 | __channel_help(console_chan_setup, "con"); |