Loading...
1/*
2 * Copyright (C) 2000, 2002 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
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 "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/* Almost const, except that xterm_title may be changed in an initcall */
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/* Const, except for .mc.list */
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/* The array is initialized by line_init, at initcall time. The
66 * elements are locked individually as needed.
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 .hangup = line_hangup,
109};
110
111/* Changed by ssl_init and referenced by ssl_exit, which are both serialized
112 * by being an initcall and exitcall, respectively.
113 */
114static int ssl_init_done = 0;
115
116static void ssl_console_write(struct console *c, const char *string,
117 unsigned len)
118{
119 struct line *line = &serial_lines[c->index];
120 unsigned long flags;
121
122 spin_lock_irqsave(&line->lock, flags);
123 console_write_chan(line->chan_out, string, len);
124 spin_unlock_irqrestore(&line->lock, flags);
125}
126
127static struct tty_driver *ssl_console_device(struct console *c, int *index)
128{
129 *index = c->index;
130 return driver.driver;
131}
132
133static int ssl_console_setup(struct console *co, char *options)
134{
135 struct line *line = &serial_lines[co->index];
136
137 return console_open_chan(line, co);
138}
139
140/* No locking for register_console call - relies on single-threaded initcalls */
141static struct console ssl_cons = {
142 .name = "ttyS",
143 .write = ssl_console_write,
144 .device = ssl_console_device,
145 .setup = ssl_console_setup,
146 .flags = CON_PRINTBUFFER|CON_ANYTIME,
147 .index = -1,
148};
149
150static int ssl_init(void)
151{
152 char *new_title;
153 int err;
154 int i;
155
156 printk(KERN_INFO "Initializing software serial port version %d\n",
157 ssl_version);
158
159 err = register_lines(&driver, &ssl_ops, serial_lines,
160 ARRAY_SIZE(serial_lines));
161 if (err)
162 return err;
163
164 new_title = add_xterm_umid(opts.xterm_title);
165 if (new_title != NULL)
166 opts.xterm_title = new_title;
167
168 for (i = 0; i < NR_PORTS; i++) {
169 char *error;
170 char *s = conf[i];
171 if (!s)
172 s = def_conf;
173 if (setup_one_line(serial_lines, i, s, &opts, &error))
174 printk(KERN_ERR "setup_one_line failed for "
175 "device %d : %s\n", i, error);
176 }
177
178 ssl_init_done = 1;
179 register_console(&ssl_cons);
180 return 0;
181}
182late_initcall(ssl_init);
183
184static void ssl_exit(void)
185{
186 if (!ssl_init_done)
187 return;
188 close_lines(serial_lines, ARRAY_SIZE(serial_lines));
189}
190__uml_exitcall(ssl_exit);
191
192static int ssl_chan_setup(char *str)
193{
194 line_setup(conf, NR_PORTS, &def_conf, str, "serial line");
195 return 1;
196}
197
198__setup("ssl", ssl_chan_setup);
199__channel_help(ssl_chan_setup, "ssl");
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2000, 2002 Jeff Dike (jdike@karaya.com)
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/* Almost const, except that xterm_title may be changed in an initcall */
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/* Const, except for .mc.list */
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/* The array is initialized by line_init, at initcall time. The
65 * elements are locked individually as needed.
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 .write_room = line_write_room,
99 .chars_in_buffer = line_chars_in_buffer,
100 .flush_buffer = line_flush_buffer,
101 .flush_chars = line_flush_chars,
102 .set_termios = line_set_termios,
103 .throttle = line_throttle,
104 .unthrottle = line_unthrottle,
105 .install = ssl_install,
106 .hangup = line_hangup,
107};
108
109/* Changed by ssl_init and referenced by ssl_exit, which are both serialized
110 * by being an initcall and exitcall, respectively.
111 */
112static int ssl_init_done = 0;
113
114static void ssl_console_write(struct console *c, const char *string,
115 unsigned len)
116{
117 struct line *line = &serial_lines[c->index];
118 unsigned long flags;
119
120 spin_lock_irqsave(&line->lock, flags);
121 console_write_chan(line->chan_out, string, len);
122 spin_unlock_irqrestore(&line->lock, flags);
123}
124
125static struct tty_driver *ssl_console_device(struct console *c, int *index)
126{
127 *index = c->index;
128 return driver.driver;
129}
130
131static int ssl_console_setup(struct console *co, char *options)
132{
133 struct line *line = &serial_lines[co->index];
134
135 return console_open_chan(line, co);
136}
137
138/* No locking for register_console call - relies on single-threaded initcalls */
139static struct console ssl_cons = {
140 .name = "ttyS",
141 .write = ssl_console_write,
142 .device = ssl_console_device,
143 .setup = ssl_console_setup,
144 .flags = CON_PRINTBUFFER|CON_ANYTIME,
145 .index = -1,
146};
147
148static int ssl_init(void)
149{
150 char *new_title;
151 int err;
152 int i;
153
154 printk(KERN_INFO "Initializing software serial port version %d\n",
155 ssl_version);
156
157 err = register_lines(&driver, &ssl_ops, serial_lines,
158 ARRAY_SIZE(serial_lines));
159 if (err)
160 return err;
161
162 new_title = add_xterm_umid(opts.xterm_title);
163 if (new_title != NULL)
164 opts.xterm_title = new_title;
165
166 for (i = 0; i < NR_PORTS; i++) {
167 char *error;
168 char *s = conf[i];
169 if (!s)
170 s = def_conf;
171 if (setup_one_line(serial_lines, i, s, &opts, &error))
172 printk(KERN_ERR "setup_one_line failed for "
173 "device %d : %s\n", i, error);
174 }
175
176 ssl_init_done = 1;
177 register_console(&ssl_cons);
178 return 0;
179}
180late_initcall(ssl_init);
181
182static void ssl_exit(void)
183{
184 if (!ssl_init_done)
185 return;
186 close_lines(serial_lines, ARRAY_SIZE(serial_lines));
187}
188__uml_exitcall(ssl_exit);
189
190static int ssl_chan_setup(char *str)
191{
192 line_setup(conf, NR_PORTS, &def_conf, str, "serial line");
193 return 1;
194}
195
196__setup("ssl", ssl_chan_setup);
197__channel_help(ssl_chan_setup, "ssl");
198
199static int ssl_non_raw_setup(char *str)
200{
201 opts.raw = 0;
202 return 1;
203}
204__setup("ssl-non-raw", ssl_non_raw_setup);
205__channel_help(ssl_non_raw_setup, "set serial lines to non-raw mode");