Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2000, 2002 Jeff Dike (jdike@karaya.com) |
| 3 | * Licensed under the GPL |
| 4 | */ |
| 5 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 "line.h" |
| 16 | #include "ssl.h" |
| 17 | #include "chan_kern.h" |
| 18 | #include "user_util.h" |
| 19 | #include "kern_util.h" |
| 20 | #include "kern.h" |
| 21 | #include "init.h" |
| 22 | #include "irq_user.h" |
| 23 | #include "mconsole_kern.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | |
Jeff Dike | 5e7672e | 2006-09-27 01:50:33 -0700 | [diff] [blame] | 25 | static const int ssl_version = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | |
| 27 | /* Referenced only by tty_driver below - presumably it's locked correctly |
| 28 | * by the tty driver. |
| 29 | */ |
| 30 | |
| 31 | static struct tty_driver *ssl_driver; |
| 32 | |
| 33 | #define NR_PORTS 64 |
| 34 | |
Paolo 'Blaisorblade' Giarrusso | 42947cb | 2006-02-01 03:06:29 -0800 | [diff] [blame] | 35 | static void ssl_announce(char *dev_name, int dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | { |
| 37 | printk(KERN_INFO "Serial line %d assigned device '%s'\n", dev, |
| 38 | dev_name); |
| 39 | } |
| 40 | |
Jeff Dike | a52f362 | 2007-02-10 01:44:06 -0800 | [diff] [blame] | 41 | /* Almost const, except that xterm_title may be changed in an initcall */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | static struct chan_opts opts = { |
| 43 | .announce = ssl_announce, |
| 44 | .xterm_title = "Serial Line #%d", |
| 45 | .raw = 1, |
| 46 | .tramp_stack = 0, |
| 47 | .in_kernel = 1, |
| 48 | }; |
| 49 | |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 50 | static int ssl_config(char *str, char **error_out); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | static int ssl_get_config(char *dev, char *str, int size, char **error_out); |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 52 | static int ssl_remove(int n, char **error_out); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
Jeff Dike | d5c9ffc | 2007-02-10 01:44:08 -0800 | [diff] [blame^] | 54 | |
| 55 | /* Const, except for .mc.list */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | static struct line_driver driver = { |
| 57 | .name = "UML serial line", |
| 58 | .device_name = "ttyS", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | .major = TTY_MAJOR, |
| 60 | .minor_start = 64, |
| 61 | .type = TTY_DRIVER_TYPE_SERIAL, |
| 62 | .subtype = 0, |
| 63 | .read_irq = SSL_IRQ, |
| 64 | .read_irq_name = "ssl", |
| 65 | .write_irq = SSL_WRITE_IRQ, |
| 66 | .write_irq_name = "ssl-write", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | .mc = { |
Jeff Dike | 84f48d4 | 2007-02-10 01:44:01 -0800 | [diff] [blame] | 68 | .list = LIST_HEAD_INIT(driver.mc.list), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | .name = "ssl", |
| 70 | .config = ssl_config, |
| 71 | .get_config = ssl_get_config, |
Jeff Dike | d50084a | 2006-01-06 00:18:50 -0800 | [diff] [blame] | 72 | .id = line_id, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | .remove = ssl_remove, |
| 74 | }, |
| 75 | }; |
| 76 | |
Jeff Dike | d5c9ffc | 2007-02-10 01:44:08 -0800 | [diff] [blame^] | 77 | /* The array is initialized by line_init, at initcall time. The |
| 78 | * elements are locked individually as needed. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | */ |
| 80 | static struct line serial_lines[NR_PORTS] = |
| 81 | { [0 ... NR_PORTS - 1] = LINE_INIT(CONFIG_SSL_CHAN, &driver) }; |
| 82 | |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 83 | static int ssl_config(char *str, char **error_out) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | { |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 85 | return line_config(serial_lines, ARRAY_SIZE(serial_lines), str, &opts, |
| 86 | error_out); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | } |
| 88 | |
| 89 | static int ssl_get_config(char *dev, char *str, int size, char **error_out) |
| 90 | { |
Jeff Dike | 0834cc7 | 2006-01-06 00:18:51 -0800 | [diff] [blame] | 91 | return line_get_config(dev, serial_lines, ARRAY_SIZE(serial_lines), str, |
| 92 | size, error_out); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | } |
| 94 | |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 95 | static int ssl_remove(int n, char **error_out) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | { |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 97 | return line_remove(serial_lines, ARRAY_SIZE(serial_lines), n, |
| 98 | error_out); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | } |
| 100 | |
Paolo 'Blaisorblade' Giarrusso | 42947cb | 2006-02-01 03:06:29 -0800 | [diff] [blame] | 101 | static int ssl_open(struct tty_struct *tty, struct file *filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | { |
Jeff Dike | 1f80171 | 2006-01-06 00:18:55 -0800 | [diff] [blame] | 103 | return line_open(serial_lines, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | } |
| 105 | |
| 106 | #if 0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | static void ssl_flush_buffer(struct tty_struct *tty) |
| 108 | { |
| 109 | return; |
| 110 | } |
| 111 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | static void ssl_stop(struct tty_struct *tty) |
| 113 | { |
| 114 | printk(KERN_ERR "Someone should implement ssl_stop\n"); |
| 115 | } |
| 116 | |
| 117 | static void ssl_start(struct tty_struct *tty) |
| 118 | { |
| 119 | printk(KERN_ERR "Someone should implement ssl_start\n"); |
| 120 | } |
| 121 | |
| 122 | void ssl_hangup(struct tty_struct *tty) |
| 123 | { |
| 124 | } |
| 125 | #endif |
| 126 | |
Jeff Dike | 5e7672e | 2006-09-27 01:50:33 -0700 | [diff] [blame] | 127 | static const struct tty_operations ssl_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | .open = ssl_open, |
| 129 | .close = line_close, |
| 130 | .write = line_write, |
| 131 | .put_char = line_put_char, |
| 132 | .write_room = line_write_room, |
| 133 | .chars_in_buffer = line_chars_in_buffer, |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 134 | .flush_buffer = line_flush_buffer, |
| 135 | .flush_chars = line_flush_chars, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | .set_termios = line_set_termios, |
| 137 | .ioctl = line_ioctl, |
Jeff Dike | e4dcee8 | 2006-01-06 00:18:58 -0800 | [diff] [blame] | 138 | .throttle = line_throttle, |
| 139 | .unthrottle = line_unthrottle, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | #if 0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | .stop = ssl_stop, |
| 142 | .start = ssl_start, |
| 143 | .hangup = ssl_hangup, |
| 144 | #endif |
| 145 | }; |
| 146 | |
| 147 | /* Changed by ssl_init and referenced by ssl_exit, which are both serialized |
| 148 | * by being an initcall and exitcall, respectively. |
| 149 | */ |
| 150 | static int ssl_init_done = 0; |
| 151 | |
| 152 | static void ssl_console_write(struct console *c, const char *string, |
| 153 | unsigned len) |
| 154 | { |
| 155 | struct line *line = &serial_lines[c->index]; |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 156 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 158 | spin_lock_irqsave(&line->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | console_write_chan(&line->chan_list, string, len); |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 160 | spin_unlock_irqrestore(&line->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | } |
| 162 | |
| 163 | static struct tty_driver *ssl_console_device(struct console *c, int *index) |
| 164 | { |
| 165 | *index = c->index; |
| 166 | return ssl_driver; |
| 167 | } |
| 168 | |
| 169 | static int ssl_console_setup(struct console *co, char *options) |
| 170 | { |
| 171 | struct line *line = &serial_lines[co->index]; |
| 172 | |
Jeff Dike | a52f362 | 2007-02-10 01:44:06 -0800 | [diff] [blame] | 173 | return console_open_chan(line, co); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | } |
| 175 | |
Jeff Dike | d5c9ffc | 2007-02-10 01:44:08 -0800 | [diff] [blame^] | 176 | /* No locking for register_console call - relies on single-threaded initcalls */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | static struct console ssl_cons = { |
| 178 | .name = "ttyS", |
| 179 | .write = ssl_console_write, |
| 180 | .device = ssl_console_device, |
| 181 | .setup = ssl_console_setup, |
| 182 | .flags = CON_PRINTBUFFER, |
| 183 | .index = -1, |
| 184 | }; |
| 185 | |
Paolo 'Blaisorblade' Giarrusso | 42947cb | 2006-02-01 03:06:29 -0800 | [diff] [blame] | 186 | static int ssl_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | { |
| 188 | char *new_title; |
| 189 | |
Jeff Dike | d50084a | 2006-01-06 00:18:50 -0800 | [diff] [blame] | 190 | printk(KERN_INFO "Initializing software serial port version %d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | ssl_version); |
Jeff Dike | d5c9ffc | 2007-02-10 01:44:08 -0800 | [diff] [blame^] | 192 | ssl_driver = register_lines(&driver, &ssl_ops, serial_lines, |
| 193 | ARRAY_SIZE(serial_lines)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | |
Jeff Dike | 1f80171 | 2006-01-06 00:18:55 -0800 | [diff] [blame] | 195 | lines_init(serial_lines, ARRAY_SIZE(serial_lines), &opts); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | |
| 197 | new_title = add_xterm_umid(opts.xterm_title); |
| 198 | if (new_title != NULL) |
| 199 | opts.xterm_title = new_title; |
| 200 | |
| 201 | ssl_init_done = 1; |
| 202 | register_console(&ssl_cons); |
Jeff Dike | d50084a | 2006-01-06 00:18:50 -0800 | [diff] [blame] | 203 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | } |
| 205 | late_initcall(ssl_init); |
| 206 | |
| 207 | static void ssl_exit(void) |
| 208 | { |
| 209 | if (!ssl_init_done) |
| 210 | return; |
Jeff Dike | 0834cc7 | 2006-01-06 00:18:51 -0800 | [diff] [blame] | 211 | close_lines(serial_lines, ARRAY_SIZE(serial_lines)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | } |
| 213 | __uml_exitcall(ssl_exit); |
| 214 | |
| 215 | static int ssl_chan_setup(char *str) |
| 216 | { |
Jeff Dike | f28169d | 2007-02-10 01:43:53 -0800 | [diff] [blame] | 217 | char *error; |
| 218 | int ret; |
| 219 | |
| 220 | ret = line_setup(serial_lines, ARRAY_SIZE(serial_lines), str, &error); |
| 221 | if(ret < 0) |
| 222 | printk(KERN_ERR "Failed to set up serial line with " |
| 223 | "configuration string \"%s\" : %s\n", str, error); |
| 224 | |
| 225 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | } |
| 227 | |
| 228 | __setup("ssl", ssl_chan_setup); |
| 229 | __channel_help(ssl_chan_setup, "ssl"); |