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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Copyright (C) 2000, 2002 Jeff Dike (jdike@karaya.com) | |
3 | * Licensed under the GPL | |
4 | */ | |
5 | ||
1da177e4 LT |
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" | |
1da177e4 | 15 | #include "ssl.h" |
510c72a3 | 16 | #include "chan.h" |
1da177e4 LT |
17 | #include "init.h" |
18 | #include "irq_user.h" | |
19 | #include "mconsole_kern.h" | |
1da177e4 | 20 | |
5e7672ec | 21 | static const int ssl_version = 1; |
1da177e4 | 22 | |
1da177e4 LT |
23 | #define NR_PORTS 64 |
24 | ||
42947cb9 | 25 | static void ssl_announce(char *dev_name, int dev) |
1da177e4 LT |
26 | { |
27 | printk(KERN_INFO "Serial line %d assigned device '%s'\n", dev, | |
28 | dev_name); | |
29 | } | |
30 | ||
a52f362f | 31 | /* Almost const, except that xterm_title may be changed in an initcall */ |
1da177e4 LT |
32 | static struct chan_opts opts = { |
33 | .announce = ssl_announce, | |
34 | .xterm_title = "Serial Line #%d", | |
35 | .raw = 1, | |
1da177e4 LT |
36 | }; |
37 | ||
f28169d2 | 38 | static int ssl_config(char *str, char **error_out); |
1da177e4 | 39 | static int ssl_get_config(char *dev, char *str, int size, char **error_out); |
f28169d2 | 40 | static int ssl_remove(int n, char **error_out); |
1da177e4 | 41 | |
d5c9ffc6 JD |
42 | |
43 | /* Const, except for .mc.list */ | |
1da177e4 LT |
44 | static struct line_driver driver = { |
45 | .name = "UML serial line", | |
46 | .device_name = "ttyS", | |
1da177e4 LT |
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", | |
1da177e4 | 55 | .mc = { |
84f48d4f | 56 | .list = LIST_HEAD_INIT(driver.mc.list), |
1da177e4 LT |
57 | .name = "ssl", |
58 | .config = ssl_config, | |
59 | .get_config = ssl_get_config, | |
d50084a2 | 60 | .id = line_id, |
1da177e4 LT |
61 | .remove = ssl_remove, |
62 | }, | |
63 | }; | |
64 | ||
d5c9ffc6 JD |
65 | /* The array is initialized by line_init, at initcall time. The |
66 | * elements are locked individually as needed. | |
1da177e4 | 67 | */ |
43574c1a AV |
68 | static char *conf[NR_PORTS]; |
69 | static char *def_conf = CONFIG_SSL_CHAN; | |
70 | static struct line serial_lines[NR_PORTS]; | |
1da177e4 | 71 | |
f28169d2 | 72 | static int ssl_config(char *str, char **error_out) |
1da177e4 | 73 | { |
f28169d2 JD |
74 | return line_config(serial_lines, ARRAY_SIZE(serial_lines), str, &opts, |
75 | error_out); | |
1da177e4 LT |
76 | } |
77 | ||
78 | static int ssl_get_config(char *dev, char *str, int size, char **error_out) | |
79 | { | |
0834cc77 JD |
80 | return line_get_config(dev, serial_lines, ARRAY_SIZE(serial_lines), str, |
81 | size, error_out); | |
1da177e4 LT |
82 | } |
83 | ||
f28169d2 | 84 | static int ssl_remove(int n, char **error_out) |
1da177e4 | 85 | { |
f28169d2 JD |
86 | return line_remove(serial_lines, ARRAY_SIZE(serial_lines), n, |
87 | error_out); | |
1da177e4 LT |
88 | } |
89 | ||
42947cb9 | 90 | static int ssl_open(struct tty_struct *tty, struct file *filp) |
1da177e4 | 91 | { |
d14ad81f JD |
92 | int err = line_open(serial_lines, tty); |
93 | ||
94 | if (err) | |
95 | printk(KERN_ERR "Failed to open serial line %d, err = %d\n", | |
96 | tty->index, err); | |
97 | ||
98 | return err; | |
1da177e4 LT |
99 | } |
100 | ||
101 | #if 0 | |
1da177e4 LT |
102 | static void ssl_flush_buffer(struct tty_struct *tty) |
103 | { | |
104 | return; | |
105 | } | |
106 | ||
1da177e4 LT |
107 | static void ssl_stop(struct tty_struct *tty) |
108 | { | |
109 | printk(KERN_ERR "Someone should implement ssl_stop\n"); | |
110 | } | |
111 | ||
112 | static void ssl_start(struct tty_struct *tty) | |
113 | { | |
114 | printk(KERN_ERR "Someone should implement ssl_start\n"); | |
115 | } | |
116 | ||
117 | void ssl_hangup(struct tty_struct *tty) | |
118 | { | |
119 | } | |
120 | #endif | |
121 | ||
5e7672ec | 122 | static const struct tty_operations ssl_ops = { |
1da177e4 LT |
123 | .open = ssl_open, |
124 | .close = line_close, | |
125 | .write = line_write, | |
126 | .put_char = line_put_char, | |
127 | .write_room = line_write_room, | |
128 | .chars_in_buffer = line_chars_in_buffer, | |
b97b77cc PBG |
129 | .flush_buffer = line_flush_buffer, |
130 | .flush_chars = line_flush_chars, | |
1da177e4 LT |
131 | .set_termios = line_set_termios, |
132 | .ioctl = line_ioctl, | |
e4dcee80 JD |
133 | .throttle = line_throttle, |
134 | .unthrottle = line_unthrottle, | |
1da177e4 | 135 | #if 0 |
1da177e4 LT |
136 | .stop = ssl_stop, |
137 | .start = ssl_start, | |
138 | .hangup = ssl_hangup, | |
139 | #endif | |
140 | }; | |
141 | ||
142 | /* Changed by ssl_init and referenced by ssl_exit, which are both serialized | |
143 | * by being an initcall and exitcall, respectively. | |
144 | */ | |
145 | static int ssl_init_done = 0; | |
146 | ||
147 | static void ssl_console_write(struct console *c, const char *string, | |
148 | unsigned len) | |
149 | { | |
150 | struct line *line = &serial_lines[c->index]; | |
b97b77cc | 151 | unsigned long flags; |
1da177e4 | 152 | |
b97b77cc | 153 | spin_lock_irqsave(&line->lock, flags); |
1da177e4 | 154 | console_write_chan(&line->chan_list, string, len); |
b97b77cc | 155 | spin_unlock_irqrestore(&line->lock, flags); |
1da177e4 LT |
156 | } |
157 | ||
158 | static struct tty_driver *ssl_console_device(struct console *c, int *index) | |
159 | { | |
160 | *index = c->index; | |
cfe6b7c7 | 161 | return driver.driver; |
1da177e4 LT |
162 | } |
163 | ||
164 | static int ssl_console_setup(struct console *co, char *options) | |
165 | { | |
166 | struct line *line = &serial_lines[co->index]; | |
167 | ||
a52f362f | 168 | return console_open_chan(line, co); |
1da177e4 LT |
169 | } |
170 | ||
d5c9ffc6 | 171 | /* No locking for register_console call - relies on single-threaded initcalls */ |
1da177e4 LT |
172 | static struct console ssl_cons = { |
173 | .name = "ttyS", | |
174 | .write = ssl_console_write, | |
175 | .device = ssl_console_device, | |
176 | .setup = ssl_console_setup, | |
b5337885 | 177 | .flags = CON_PRINTBUFFER|CON_ANYTIME, |
1da177e4 LT |
178 | .index = -1, |
179 | }; | |
180 | ||
42947cb9 | 181 | static int ssl_init(void) |
1da177e4 LT |
182 | { |
183 | char *new_title; | |
cfe6b7c7 | 184 | int err; |
43574c1a | 185 | int i; |
1da177e4 | 186 | |
d50084a2 | 187 | printk(KERN_INFO "Initializing software serial port version %d\n", |
1da177e4 | 188 | ssl_version); |
43574c1a AV |
189 | |
190 | for (i = 0; i < NR_PORTS; i++) { | |
191 | char *s = conf[i]; | |
192 | if (!s) | |
193 | s = def_conf; | |
cfe6b7c7 | 194 | if (s && strcmp(s, "none") != 0) |
43574c1a | 195 | serial_lines[i].init_str = s; |
43574c1a | 196 | spin_lock_init(&serial_lines[i].lock); |
d8c215ad | 197 | mutex_init(&serial_lines[i].count_lock); |
43574c1a AV |
198 | serial_lines[i].driver = &driver; |
199 | } | |
cfe6b7c7 | 200 | err = register_lines(&driver, &ssl_ops, serial_lines, |
d5c9ffc6 | 201 | ARRAY_SIZE(serial_lines)); |
cfe6b7c7 AV |
202 | if (err) |
203 | return err; | |
1da177e4 | 204 | |
1da177e4 LT |
205 | new_title = add_xterm_umid(opts.xterm_title); |
206 | if (new_title != NULL) | |
207 | opts.xterm_title = new_title; | |
208 | ||
57ac895a DB |
209 | lines_init(serial_lines, ARRAY_SIZE(serial_lines), &opts); |
210 | ||
1da177e4 LT |
211 | ssl_init_done = 1; |
212 | register_console(&ssl_cons); | |
d50084a2 | 213 | return 0; |
1da177e4 LT |
214 | } |
215 | late_initcall(ssl_init); | |
216 | ||
217 | static void ssl_exit(void) | |
218 | { | |
219 | if (!ssl_init_done) | |
220 | return; | |
0834cc77 | 221 | close_lines(serial_lines, ARRAY_SIZE(serial_lines)); |
1da177e4 LT |
222 | } |
223 | __uml_exitcall(ssl_exit); | |
224 | ||
225 | static int ssl_chan_setup(char *str) | |
226 | { | |
43574c1a | 227 | line_setup(conf, NR_PORTS, &def_conf, str, "serial line"); |
f28169d2 | 228 | return 1; |
1da177e4 LT |
229 | } |
230 | ||
231 | __setup("ssl", ssl_chan_setup); | |
232 | __channel_help(ssl_chan_setup, "ssl"); |