1
2
3
4
5
6#include <linux/fs.h>
7#include <linux/tty.h>
8#include <linux/tty_driver.h>
9#include <linux/major.h>
10#include <linux/mm.h>
11#include <linux/init.h>
12#include <linux/console.h>
13#include <asm/termbits.h>
14#include <asm/irq.h>
15#include "chan.h"
16#include <init.h>
17#include <irq_user.h>
18#include "mconsole_kern.h"
19
20static const int ssl_version = 1;
21
22#define NR_PORTS 64
23
24static void ssl_announce(char *dev_name, int dev)
25{
26 printk(KERN_INFO "Serial line %d assigned device '%s'\n", dev,
27 dev_name);
28}
29
30
31static struct chan_opts opts = {
32 .announce = ssl_announce,
33 .xterm_title = "Serial Line #%d",
34 .raw = 1,
35};
36
37static int ssl_config(char *str, char **error_out);
38static int ssl_get_config(char *dev, char *str, int size, char **error_out);
39static int ssl_remove(int n, char **error_out);
40
41
42
43static struct line_driver driver = {
44 .name = "UML serial line",
45 .device_name = "ttyS",
46 .major = TTY_MAJOR,
47 .minor_start = 64,
48 .type = TTY_DRIVER_TYPE_SERIAL,
49 .subtype = 0,
50 .read_irq = SSL_IRQ,
51 .read_irq_name = "ssl",
52 .write_irq = SSL_WRITE_IRQ,
53 .write_irq_name = "ssl-write",
54 .mc = {
55 .list = LIST_HEAD_INIT(driver.mc.list),
56 .name = "ssl",
57 .config = ssl_config,
58 .get_config = ssl_get_config,
59 .id = line_id,
60 .remove = ssl_remove,
61 },
62};
63
64
65
66
67static char *conf[NR_PORTS];
68static char *def_conf = CONFIG_SSL_CHAN;
69static struct line serial_lines[NR_PORTS];
70
71static int ssl_config(char *str, char **error_out)
72{
73 return line_config(serial_lines, ARRAY_SIZE(serial_lines), str, &opts,
74 error_out);
75}
76
77static int ssl_get_config(char *dev, char *str, int size, char **error_out)
78{
79 return line_get_config(dev, serial_lines, ARRAY_SIZE(serial_lines), str,
80 size, error_out);
81}
82
83static int ssl_remove(int n, char **error_out)
84{
85 return line_remove(serial_lines, ARRAY_SIZE(serial_lines), n,
86 error_out);
87}
88
89static int ssl_install(struct tty_driver *driver, struct tty_struct *tty)
90{
91 return line_install(driver, tty, &serial_lines[tty->index]);
92}
93
94static const struct tty_operations ssl_ops = {
95 .open = line_open,
96 .close = line_close,
97 .write = line_write,
98 .put_char = line_put_char,
99 .write_room = line_write_room,
100 .chars_in_buffer = line_chars_in_buffer,
101 .flush_buffer = line_flush_buffer,
102 .flush_chars = line_flush_chars,
103 .set_termios = line_set_termios,
104 .throttle = line_throttle,
105 .unthrottle = line_unthrottle,
106 .install = ssl_install,
107 .hangup = line_hangup,
108};
109
110
111
112
113static int ssl_init_done = 0;
114
115static void ssl_console_write(struct console *c, const char *string,
116 unsigned len)
117{
118 struct line *line = &serial_lines[c->index];
119 unsigned long flags;
120
121 spin_lock_irqsave(&line->lock, flags);
122 console_write_chan(line->chan_out, string, len);
123 spin_unlock_irqrestore(&line->lock, flags);
124}
125
126static struct tty_driver *ssl_console_device(struct console *c, int *index)
127{
128 *index = c->index;
129 return driver.driver;
130}
131
132static int ssl_console_setup(struct console *co, char *options)
133{
134 struct line *line = &serial_lines[co->index];
135
136 return console_open_chan(line, co);
137}
138
139
140static struct console ssl_cons = {
141 .name = "ttyS",
142 .write = ssl_console_write,
143 .device = ssl_console_device,
144 .setup = ssl_console_setup,
145 .flags = CON_PRINTBUFFER|CON_ANYTIME,
146 .index = -1,
147};
148
149static int ssl_init(void)
150{
151 char *new_title;
152 int err;
153 int i;
154
155 printk(KERN_INFO "Initializing software serial port version %d\n",
156 ssl_version);
157
158 err = register_lines(&driver, &ssl_ops, serial_lines,
159 ARRAY_SIZE(serial_lines));
160 if (err)
161 return err;
162
163 new_title = add_xterm_umid(opts.xterm_title);
164 if (new_title != NULL)
165 opts.xterm_title = new_title;
166
167 for (i = 0; i < NR_PORTS; i++) {
168 char *error;
169 char *s = conf[i];
170 if (!s)
171 s = def_conf;
172 if (setup_one_line(serial_lines, i, s, &opts, &error))
173 printk(KERN_ERR "setup_one_line failed for "
174 "device %d : %s\n", i, error);
175 }
176
177 ssl_init_done = 1;
178 register_console(&ssl_cons);
179 return 0;
180}
181late_initcall(ssl_init);
182
183static void ssl_exit(void)
184{
185 if (!ssl_init_done)
186 return;
187 close_lines(serial_lines, ARRAY_SIZE(serial_lines));
188}
189__uml_exitcall(ssl_exit);
190
191static int ssl_chan_setup(char *str)
192{
193 line_setup(conf, NR_PORTS, &def_conf, str, "serial line");
194 return 1;
195}
196
197__setup("ssl", ssl_chan_setup);
198__channel_help(ssl_chan_setup, "ssl");
199
