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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 "ssl.h"
16#include "chan.h"
17#include <init.h>
18#include <irq_user.h>
19#include "mconsole_kern.h"
20
21static const int ssl_version = 1;
22
23#define NR_PORTS 64
24
25static void ssl_announce(char *dev_name, int dev)
26{
27 printk(KERN_INFO "Serial line %d assigned device '%s'\n", dev,
28 dev_name);
29}
30
31
32static struct chan_opts opts = {
33 .announce = ssl_announce,
34 .xterm_title = "Serial Line #%d",
35 .raw = 1,
36};
37
38static int ssl_config(char *str, char **error_out);
39static int ssl_get_config(char *dev, char *str, int size, char **error_out);
40static int ssl_remove(int n, char **error_out);
41
42
43
44static struct line_driver driver = {
45 .name = "UML serial line",
46 .device_name = "ttyS",
47 .major = TTY_MAJOR,
48 .minor_start = 64,
49 .type = TTY_DRIVER_TYPE_SERIAL,
50 .subtype = 0,
51 .read_irq = SSL_IRQ,
52 .read_irq_name = "ssl",
53 .write_irq = SSL_WRITE_IRQ,
54 .write_irq_name = "ssl-write",
55 .mc = {
56 .list = LIST_HEAD_INIT(driver.mc.list),
57 .name = "ssl",
58 .config = ssl_config,
59 .get_config = ssl_get_config,
60 .id = line_id,
61 .remove = ssl_remove,
62 },
63};
64
65
66
67
68static char *conf[NR_PORTS];
69static char *def_conf = CONFIG_SSL_CHAN;
70static struct line serial_lines[NR_PORTS];
71
72static int ssl_config(char *str, char **error_out)
73{
74 return line_config(serial_lines, ARRAY_SIZE(serial_lines), str, &opts,
75 error_out);
76}
77
78static int ssl_get_config(char *dev, char *str, int size, char **error_out)
79{
80 return line_get_config(dev, serial_lines, ARRAY_SIZE(serial_lines), str,
81 size, error_out);
82}
83
84static int ssl_remove(int n, char **error_out)
85{
86 return line_remove(serial_lines, ARRAY_SIZE(serial_lines), n,
87 error_out);
88}
89
90static int ssl_install(struct tty_driver *driver, struct tty_struct *tty)
91{
92 return line_install(driver, tty, &serial_lines[tty->index]);
93}
94
95static const struct tty_operations ssl_ops = {
96 .open = line_open,
97 .close = line_close,
98 .write = line_write,
99 .put_char = line_put_char,
100 .write_room = line_write_room,
101 .chars_in_buffer = line_chars_in_buffer,
102 .flush_buffer = line_flush_buffer,
103 .flush_chars = line_flush_chars,
104 .set_termios = line_set_termios,
105 .throttle = line_throttle,
106 .unthrottle = line_unthrottle,
107 .install = ssl_install,
108 .cleanup = line_cleanup,
109 .hangup = line_hangup,
110};
111
112
113
114
115static int ssl_init_done = 0;
116
117static void ssl_console_write(struct console *c, const char *string,
118 unsigned len)
119{
120 struct line *line = &serial_lines[c->index];
121 unsigned long flags;
122
123 spin_lock_irqsave(&line->lock, flags);
124 console_write_chan(line->chan_out, string, len);
125 spin_unlock_irqrestore(&line->lock, flags);
126}
127
128static struct tty_driver *ssl_console_device(struct console *c, int *index)
129{
130 *index = c->index;
131 return driver.driver;
132}
133
134static int ssl_console_setup(struct console *co, char *options)
135{
136 struct line *line = &serial_lines[co->index];
137
138 return console_open_chan(line, co);
139}
140
141
142static struct console ssl_cons = {
143 .name = "ttyS",
144 .write = ssl_console_write,
145 .device = ssl_console_device,
146 .setup = ssl_console_setup,
147 .flags = CON_PRINTBUFFER|CON_ANYTIME,
148 .index = -1,
149};
150
151static int ssl_init(void)
152{
153 char *new_title;
154 int err;
155 int i;
156
157 printk(KERN_INFO "Initializing software serial port version %d\n",
158 ssl_version);
159
160 err = register_lines(&driver, &ssl_ops, serial_lines,
161 ARRAY_SIZE(serial_lines));
162 if (err)
163 return err;
164
165 new_title = add_xterm_umid(opts.xterm_title);
166 if (new_title != NULL)
167 opts.xterm_title = new_title;
168
169 for (i = 0; i < NR_PORTS; i++) {
170 char *error;
171 char *s = conf[i];
172 if (!s)
173 s = def_conf;
174 if (setup_one_line(serial_lines, i, s, &opts, &error))
175 printk(KERN_ERR "setup_one_line failed for "
176 "device %d : %s\n", i, error);
177 }
178
179 ssl_init_done = 1;
180 register_console(&ssl_cons);
181 return 0;
182}
183late_initcall(ssl_init);
184
185static void ssl_exit(void)
186{
187 if (!ssl_init_done)
188 return;
189 close_lines(serial_lines, ARRAY_SIZE(serial_lines));
190}
191__uml_exitcall(ssl_exit);
192
193static int ssl_chan_setup(char *str)
194{
195 line_setup(conf, NR_PORTS, &def_conf, str, "serial line");
196 return 1;
197}
198
199__setup("ssl", ssl_chan_setup);
200__channel_help(ssl_chan_setup, "ssl");
201
