Linux-2.6.12-rc2
[linux-2.6/kvm.git] / arch / um / drivers / ssl.c
blobc5839c3141f82a16e95f592e3d62fc1a359ce144
1 /*
2 * Copyright (C) 2000, 2002 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
4 */
6 #include "linux/config.h"
7 #include "linux/fs.h"
8 #include "linux/tty.h"
9 #include "linux/tty_driver.h"
10 #include "linux/major.h"
11 #include "linux/mm.h"
12 #include "linux/init.h"
13 #include "linux/console.h"
14 #include "asm/termbits.h"
15 #include "asm/irq.h"
16 #include "line.h"
17 #include "ssl.h"
18 #include "chan_kern.h"
19 #include "user_util.h"
20 #include "kern_util.h"
21 #include "kern.h"
22 #include "init.h"
23 #include "irq_user.h"
24 #include "mconsole_kern.h"
25 #include "2_5compat.h"
27 static int ssl_version = 1;
29 /* Referenced only by tty_driver below - presumably it's locked correctly
30 * by the tty driver.
33 static struct tty_driver *ssl_driver;
35 #define NR_PORTS 64
37 void ssl_announce(char *dev_name, int dev)
39 printk(KERN_INFO "Serial line %d assigned device '%s'\n", dev,
40 dev_name);
43 static struct chan_opts opts = {
44 .announce = ssl_announce,
45 .xterm_title = "Serial Line #%d",
46 .raw = 1,
47 .tramp_stack = 0,
48 .in_kernel = 1,
51 static int ssl_config(char *str);
52 static int ssl_get_config(char *dev, char *str, int size, char **error_out);
53 static int ssl_remove(char *str);
55 static struct line_driver driver = {
56 .name = "UML serial line",
57 .device_name = "ttyS",
58 .devfs_name = "tts/",
59 .major = TTY_MAJOR,
60 .minor_start = 64,
61 .type = TTY_DRIVER_TYPE_SERIAL,
62 .subtype = 0,
63 .read_irq = SSL_IRQ,
64 .read_irq_name = "ssl",
65 .write_irq = SSL_WRITE_IRQ,
66 .write_irq_name = "ssl-write",
67 .symlink_from = "serial",
68 .symlink_to = "tts",
69 .mc = {
70 .name = "ssl",
71 .config = ssl_config,
72 .get_config = ssl_get_config,
73 .remove = ssl_remove,
77 /* The array is initialized by line_init, which is an initcall. The
78 * individual elements are protected by individual semaphores.
80 static struct line serial_lines[NR_PORTS] =
81 { [0 ... NR_PORTS - 1] = LINE_INIT(CONFIG_SSL_CHAN, &driver) };
83 static struct lines lines = LINES_INIT(NR_PORTS);
85 static int ssl_config(char *str)
87 return(line_config(serial_lines,
88 sizeof(serial_lines)/sizeof(serial_lines[0]), str));
91 static int ssl_get_config(char *dev, char *str, int size, char **error_out)
93 return(line_get_config(dev, serial_lines,
94 sizeof(serial_lines)/sizeof(serial_lines[0]),
95 str, size, error_out));
98 static int ssl_remove(char *str)
100 return(line_remove(serial_lines,
101 sizeof(serial_lines)/sizeof(serial_lines[0]), str));
104 int ssl_open(struct tty_struct *tty, struct file *filp)
106 return line_open(serial_lines, tty, &opts);
109 #if 0
110 static int ssl_chars_in_buffer(struct tty_struct *tty)
112 return(0);
115 static void ssl_flush_buffer(struct tty_struct *tty)
117 return;
120 static void ssl_throttle(struct tty_struct * tty)
122 printk(KERN_ERR "Someone should implement ssl_throttle\n");
125 static void ssl_unthrottle(struct tty_struct * tty)
127 printk(KERN_ERR "Someone should implement ssl_unthrottle\n");
130 static void ssl_stop(struct tty_struct *tty)
132 printk(KERN_ERR "Someone should implement ssl_stop\n");
135 static void ssl_start(struct tty_struct *tty)
137 printk(KERN_ERR "Someone should implement ssl_start\n");
140 void ssl_hangup(struct tty_struct *tty)
143 #endif
145 static struct tty_operations ssl_ops = {
146 .open = ssl_open,
147 .close = line_close,
148 .write = line_write,
149 .put_char = line_put_char,
150 .write_room = line_write_room,
151 .chars_in_buffer = line_chars_in_buffer,
152 .set_termios = line_set_termios,
153 .ioctl = line_ioctl,
154 #if 0
155 .flush_chars = ssl_flush_chars,
156 .flush_buffer = ssl_flush_buffer,
157 .throttle = ssl_throttle,
158 .unthrottle = ssl_unthrottle,
159 .stop = ssl_stop,
160 .start = ssl_start,
161 .hangup = ssl_hangup,
162 #endif
165 /* Changed by ssl_init and referenced by ssl_exit, which are both serialized
166 * by being an initcall and exitcall, respectively.
168 static int ssl_init_done = 0;
170 static void ssl_console_write(struct console *c, const char *string,
171 unsigned len)
173 struct line *line = &serial_lines[c->index];
175 down(&line->sem);
176 console_write_chan(&line->chan_list, string, len);
177 up(&line->sem);
180 static struct tty_driver *ssl_console_device(struct console *c, int *index)
182 *index = c->index;
183 return ssl_driver;
186 static int ssl_console_setup(struct console *co, char *options)
188 struct line *line = &serial_lines[co->index];
190 return console_open_chan(line,co,&opts);
193 static struct console ssl_cons = {
194 .name = "ttyS",
195 .write = ssl_console_write,
196 .device = ssl_console_device,
197 .setup = ssl_console_setup,
198 .flags = CON_PRINTBUFFER,
199 .index = -1,
202 int ssl_init(void)
204 char *new_title;
206 printk(KERN_INFO "Initializing software serial port version %d\n",
207 ssl_version);
208 ssl_driver = line_register_devfs(&lines, &driver, &ssl_ops,
209 serial_lines, ARRAY_SIZE(serial_lines));
211 lines_init(serial_lines, sizeof(serial_lines)/sizeof(serial_lines[0]));
213 new_title = add_xterm_umid(opts.xterm_title);
214 if (new_title != NULL)
215 opts.xterm_title = new_title;
217 ssl_init_done = 1;
218 register_console(&ssl_cons);
219 return(0);
221 late_initcall(ssl_init);
223 static void ssl_exit(void)
225 if (!ssl_init_done)
226 return;
227 close_lines(serial_lines,
228 sizeof(serial_lines)/sizeof(serial_lines[0]));
230 __uml_exitcall(ssl_exit);
232 static int ssl_chan_setup(char *str)
234 return(line_setup(serial_lines,
235 sizeof(serial_lines)/sizeof(serial_lines[0]),
236 str, 1));
239 __setup("ssl", ssl_chan_setup);
240 __channel_help(ssl_chan_setup, "ssl");
243 * Overrides for Emacs so that we follow Linus's tabbing style.
244 * Emacs will notice this stuff at the end of the file and automatically
245 * adjust the settings for this buffer only. This must remain at the end
246 * of the file.
247 * ---------------------------------------------------------------------------
248 * Local variables:
249 * c-file-style: "linux"
250 * End: