2 * Copyright (C) 2000, 2002 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
8 #include "linux/tty_driver.h"
9 #include "linux/major.h"
11 #include "linux/init.h"
12 #include "linux/console.h"
13 #include "asm/termbits.h"
19 #include "mconsole_kern.h"
21 static const int ssl_version = 1;
25 static void ssl_announce(char *dev_name, int dev)
27 printk(KERN_INFO "Serial line %d assigned device '%s'\n", dev,
31 /* Almost const, except that xterm_title may be changed in an initcall */
32 static struct chan_opts opts = {
33 .announce = ssl_announce,
34 .xterm_title = "Serial Line #%d",
38 static int ssl_config(char *str, char **error_out);
39 static int ssl_get_config(char *dev, char *str, int size, char **error_out);
40 static int ssl_remove(int n, char **error_out);
43 /* Const, except for .mc.list */
44 static struct line_driver driver = {
45 .name = "UML serial line",
46 .device_name = "ttyS",
49 .type = TTY_DRIVER_TYPE_SERIAL,
52 .read_irq_name = "ssl",
53 .write_irq = SSL_WRITE_IRQ,
54 .write_irq_name = "ssl-write",
56 .list = LIST_HEAD_INIT(driver.mc.list),
59 .get_config = ssl_get_config,
65 /* The array is initialized by line_init, at initcall time. The
66 * elements are locked individually as needed.
68 static char *conf[NR_PORTS];
69 static char *def_conf = CONFIG_SSL_CHAN;
70 static struct line serial_lines[NR_PORTS];
72 static int ssl_config(char *str, char **error_out)
74 return line_config(serial_lines, ARRAY_SIZE(serial_lines), str, &opts,
78 static int ssl_get_config(char *dev, char *str, int size, char **error_out)
80 return line_get_config(dev, serial_lines, ARRAY_SIZE(serial_lines), str,
84 static int ssl_remove(int n, char **error_out)
86 return line_remove(serial_lines, ARRAY_SIZE(serial_lines), n,
90 static int ssl_open(struct tty_struct *tty, struct file *filp)
92 int err = line_open(serial_lines, tty);
95 printk(KERN_ERR "Failed to open serial line %d, err = %d\n",
101 static const struct tty_operations ssl_ops = {
105 .put_char = line_put_char,
106 .write_room = line_write_room,
107 .chars_in_buffer = line_chars_in_buffer,
108 .flush_buffer = line_flush_buffer,
109 .flush_chars = line_flush_chars,
110 .set_termios = line_set_termios,
111 .throttle = line_throttle,
112 .unthrottle = line_unthrottle,
115 /* Changed by ssl_init and referenced by ssl_exit, which are both serialized
116 * by being an initcall and exitcall, respectively.
118 static int ssl_init_done = 0;
120 static void ssl_console_write(struct console *c, const char *string,
123 struct line *line = &serial_lines[c->index];
126 spin_lock_irqsave(&line->lock, flags);
127 console_write_chan(line->chan_out, string, len);
128 spin_unlock_irqrestore(&line->lock, flags);
131 static struct tty_driver *ssl_console_device(struct console *c, int *index)
134 return driver.driver;
137 static int ssl_console_setup(struct console *co, char *options)
139 struct line *line = &serial_lines[co->index];
141 return console_open_chan(line, co);
144 /* No locking for register_console call - relies on single-threaded initcalls */
145 static struct console ssl_cons = {
147 .write = ssl_console_write,
148 .device = ssl_console_device,
149 .setup = ssl_console_setup,
150 .flags = CON_PRINTBUFFER|CON_ANYTIME,
154 static int ssl_init(void)
160 printk(KERN_INFO "Initializing software serial port version %d\n",
163 err = register_lines(&driver, &ssl_ops, serial_lines,
164 ARRAY_SIZE(serial_lines));
168 new_title = add_xterm_umid(opts.xterm_title);
169 if (new_title != NULL)
170 opts.xterm_title = new_title;
172 for (i = 0; i < NR_PORTS; i++) {
177 if (setup_one_line(serial_lines, i, s, &opts, &error))
178 printk(KERN_ERR "setup_one_line failed for "
179 "device %d : %s\n", i, error);
183 register_console(&ssl_cons);
186 late_initcall(ssl_init);
188 static void ssl_exit(void)
192 close_lines(serial_lines, ARRAY_SIZE(serial_lines));
194 __uml_exitcall(ssl_exit);
196 static int ssl_chan_setup(char *str)
198 line_setup(conf, NR_PORTS, &def_conf, str, "serial line");
202 __setup("ssl", ssl_chan_setup);
203 __channel_help(ssl_chan_setup, "ssl");