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"
17 #include "chan_kern.h"
20 #include "mconsole_kern.h"
22 static const int ssl_version = 1;
24 /* Referenced only by tty_driver below - presumably it's locked correctly
28 static struct tty_driver *ssl_driver;
32 static void ssl_announce(char *dev_name, int dev)
34 printk(KERN_INFO "Serial line %d assigned device '%s'\n", dev,
38 /* Almost const, except that xterm_title may be changed in an initcall */
39 static struct chan_opts opts = {
40 .announce = ssl_announce,
41 .xterm_title = "Serial Line #%d",
45 static int ssl_config(char *str, char **error_out);
46 static int ssl_get_config(char *dev, char *str, int size, char **error_out);
47 static int ssl_remove(int n, char **error_out);
50 /* Const, except for .mc.list */
51 static struct line_driver driver = {
52 .name = "UML serial line",
53 .device_name = "ttyS",
56 .type = TTY_DRIVER_TYPE_SERIAL,
59 .read_irq_name = "ssl",
60 .write_irq = SSL_WRITE_IRQ,
61 .write_irq_name = "ssl-write",
63 .list = LIST_HEAD_INIT(driver.mc.list),
66 .get_config = ssl_get_config,
72 /* The array is initialized by line_init, at initcall time. The
73 * elements are locked individually as needed.
75 static struct line serial_lines[NR_PORTS] =
76 { [0 ... NR_PORTS - 1] = LINE_INIT(CONFIG_SSL_CHAN, &driver) };
78 static int ssl_config(char *str, char **error_out)
80 return line_config(serial_lines, ARRAY_SIZE(serial_lines), str, &opts,
84 static int ssl_get_config(char *dev, char *str, int size, char **error_out)
86 return line_get_config(dev, serial_lines, ARRAY_SIZE(serial_lines), str,
90 static int ssl_remove(int n, char **error_out)
92 return line_remove(serial_lines, ARRAY_SIZE(serial_lines), n,
96 static int ssl_open(struct tty_struct *tty, struct file *filp)
98 int err = line_open(serial_lines, tty);
101 printk(KERN_ERR "Failed to open serial line %d, err = %d\n",
108 static void ssl_flush_buffer(struct tty_struct *tty)
113 static void ssl_stop(struct tty_struct *tty)
115 printk(KERN_ERR "Someone should implement ssl_stop\n");
118 static void ssl_start(struct tty_struct *tty)
120 printk(KERN_ERR "Someone should implement ssl_start\n");
123 void ssl_hangup(struct tty_struct *tty)
128 static const struct tty_operations ssl_ops = {
132 .put_char = line_put_char,
133 .write_room = line_write_room,
134 .chars_in_buffer = line_chars_in_buffer,
135 .flush_buffer = line_flush_buffer,
136 .flush_chars = line_flush_chars,
137 .set_termios = line_set_termios,
139 .throttle = line_throttle,
140 .unthrottle = line_unthrottle,
144 .hangup = ssl_hangup,
148 /* Changed by ssl_init and referenced by ssl_exit, which are both serialized
149 * by being an initcall and exitcall, respectively.
151 static int ssl_init_done = 0;
153 static void ssl_console_write(struct console *c, const char *string,
156 struct line *line = &serial_lines[c->index];
159 spin_lock_irqsave(&line->lock, flags);
160 console_write_chan(&line->chan_list, string, len);
161 spin_unlock_irqrestore(&line->lock, flags);
164 static struct tty_driver *ssl_console_device(struct console *c, int *index)
170 static int ssl_console_setup(struct console *co, char *options)
172 struct line *line = &serial_lines[co->index];
174 return console_open_chan(line, co);
177 /* No locking for register_console call - relies on single-threaded initcalls */
178 static struct console ssl_cons = {
180 .write = ssl_console_write,
181 .device = ssl_console_device,
182 .setup = ssl_console_setup,
183 .flags = CON_PRINTBUFFER|CON_ANYTIME,
187 static int ssl_init(void)
191 printk(KERN_INFO "Initializing software serial port version %d\n",
193 ssl_driver = register_lines(&driver, &ssl_ops, serial_lines,
194 ARRAY_SIZE(serial_lines));
196 new_title = add_xterm_umid(opts.xterm_title);
197 if (new_title != NULL)
198 opts.xterm_title = new_title;
200 lines_init(serial_lines, ARRAY_SIZE(serial_lines), &opts);
203 register_console(&ssl_cons);
206 late_initcall(ssl_init);
208 static void ssl_exit(void)
212 close_lines(serial_lines, ARRAY_SIZE(serial_lines));
214 __uml_exitcall(ssl_exit);
216 static int ssl_chan_setup(char *str)
221 ret = line_setup(serial_lines, ARRAY_SIZE(serial_lines), str, &error);
223 printk(KERN_ERR "Failed to set up serial line with "
224 "configuration string \"%s\" : %s\n", str, error);
229 __setup("ssl", ssl_chan_setup);
230 __channel_help(ssl_chan_setup, "ssl");