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 | |
| 6 | #include "linux/config.h" |
| 7 | #include "linux/fs.h" |
| 8 | #include "linux/tty.h" |
| 9 | #include "linux/tty_driver.h" |
| 10 | #include "linux/major.h" |
| 11 | #include "linux/mm.h" |
| 12 | #include "linux/init.h" |
| 13 | #include "linux/console.h" |
| 14 | #include "asm/termbits.h" |
| 15 | #include "asm/irq.h" |
| 16 | #include "line.h" |
| 17 | #include "ssl.h" |
| 18 | #include "chan_kern.h" |
| 19 | #include "user_util.h" |
| 20 | #include "kern_util.h" |
| 21 | #include "kern.h" |
| 22 | #include "init.h" |
| 23 | #include "irq_user.h" |
| 24 | #include "mconsole_kern.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | |
| 26 | static int ssl_version = 1; |
| 27 | |
| 28 | /* Referenced only by tty_driver below - presumably it's locked correctly |
| 29 | * by the tty driver. |
| 30 | */ |
| 31 | |
| 32 | static struct tty_driver *ssl_driver; |
| 33 | |
| 34 | #define NR_PORTS 64 |
| 35 | |
| 36 | void ssl_announce(char *dev_name, int dev) |
| 37 | { |
| 38 | printk(KERN_INFO "Serial line %d assigned device '%s'\n", dev, |
| 39 | dev_name); |
| 40 | } |
| 41 | |
| 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 | |
| 50 | static int ssl_config(char *str); |
| 51 | static int ssl_get_config(char *dev, char *str, int size, char **error_out); |
Jeff Dike | 29d56cf | 2005-06-25 14:55:25 -0700 | [diff] [blame] | 52 | static int ssl_remove(int n); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
| 54 | static struct line_driver driver = { |
| 55 | .name = "UML serial line", |
| 56 | .device_name = "ttyS", |
| 57 | .devfs_name = "tts/", |
| 58 | .major = TTY_MAJOR, |
| 59 | .minor_start = 64, |
| 60 | .type = TTY_DRIVER_TYPE_SERIAL, |
| 61 | .subtype = 0, |
| 62 | .read_irq = SSL_IRQ, |
| 63 | .read_irq_name = "ssl", |
| 64 | .write_irq = SSL_WRITE_IRQ, |
| 65 | .write_irq_name = "ssl-write", |
| 66 | .symlink_from = "serial", |
| 67 | .symlink_to = "tts", |
| 68 | .mc = { |
| 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 | |
| 77 | /* The array is initialized by line_init, which is an initcall. The |
| 78 | * individual elements are protected by individual semaphores. |
| 79 | */ |
| 80 | static struct line serial_lines[NR_PORTS] = |
| 81 | { [0 ... NR_PORTS - 1] = LINE_INIT(CONFIG_SSL_CHAN, &driver) }; |
| 82 | |
| 83 | static struct lines lines = LINES_INIT(NR_PORTS); |
| 84 | |
| 85 | static int ssl_config(char *str) |
| 86 | { |
Jeff Dike | 0834cc7 | 2006-01-06 00:18:51 -0800 | [diff] [blame] | 87 | return line_config(serial_lines, ARRAY_SIZE(serial_lines), str); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | } |
| 89 | |
| 90 | static int ssl_get_config(char *dev, char *str, int size, char **error_out) |
| 91 | { |
Jeff Dike | 0834cc7 | 2006-01-06 00:18:51 -0800 | [diff] [blame] | 92 | return line_get_config(dev, serial_lines, ARRAY_SIZE(serial_lines), str, |
| 93 | size, error_out); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | } |
| 95 | |
Jeff Dike | 29d56cf | 2005-06-25 14:55:25 -0700 | [diff] [blame] | 96 | static int ssl_remove(int n) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | { |
Jeff Dike | 0834cc7 | 2006-01-06 00:18:51 -0800 | [diff] [blame] | 98 | return line_remove(serial_lines, ARRAY_SIZE(serial_lines), n); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | } |
| 100 | |
| 101 | int ssl_open(struct tty_struct *tty, struct file *filp) |
| 102 | { |
| 103 | return line_open(serial_lines, tty, &opts); |
| 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 | |
| 112 | static void ssl_throttle(struct tty_struct * tty) |
| 113 | { |
| 114 | printk(KERN_ERR "Someone should implement ssl_throttle\n"); |
| 115 | } |
| 116 | |
| 117 | static void ssl_unthrottle(struct tty_struct * tty) |
| 118 | { |
| 119 | printk(KERN_ERR "Someone should implement ssl_unthrottle\n"); |
| 120 | } |
| 121 | |
| 122 | static void ssl_stop(struct tty_struct *tty) |
| 123 | { |
| 124 | printk(KERN_ERR "Someone should implement ssl_stop\n"); |
| 125 | } |
| 126 | |
| 127 | static void ssl_start(struct tty_struct *tty) |
| 128 | { |
| 129 | printk(KERN_ERR "Someone should implement ssl_start\n"); |
| 130 | } |
| 131 | |
| 132 | void ssl_hangup(struct tty_struct *tty) |
| 133 | { |
| 134 | } |
| 135 | #endif |
| 136 | |
| 137 | static struct tty_operations ssl_ops = { |
| 138 | .open = ssl_open, |
| 139 | .close = line_close, |
| 140 | .write = line_write, |
| 141 | .put_char = line_put_char, |
| 142 | .write_room = line_write_room, |
| 143 | .chars_in_buffer = line_chars_in_buffer, |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 144 | .flush_buffer = line_flush_buffer, |
| 145 | .flush_chars = line_flush_chars, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | .set_termios = line_set_termios, |
| 147 | .ioctl = line_ioctl, |
| 148 | #if 0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | .throttle = ssl_throttle, |
| 150 | .unthrottle = ssl_unthrottle, |
| 151 | .stop = ssl_stop, |
| 152 | .start = ssl_start, |
| 153 | .hangup = ssl_hangup, |
| 154 | #endif |
| 155 | }; |
| 156 | |
| 157 | /* Changed by ssl_init and referenced by ssl_exit, which are both serialized |
| 158 | * by being an initcall and exitcall, respectively. |
| 159 | */ |
| 160 | static int ssl_init_done = 0; |
| 161 | |
| 162 | static void ssl_console_write(struct console *c, const char *string, |
| 163 | unsigned len) |
| 164 | { |
| 165 | struct line *line = &serial_lines[c->index]; |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 166 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 168 | spin_lock_irqsave(&line->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | console_write_chan(&line->chan_list, string, len); |
Paolo 'Blaisorblade' Giarrusso | b97b77c | 2005-05-01 08:58:56 -0700 | [diff] [blame] | 170 | spin_unlock_irqrestore(&line->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | } |
| 172 | |
| 173 | static struct tty_driver *ssl_console_device(struct console *c, int *index) |
| 174 | { |
| 175 | *index = c->index; |
| 176 | return ssl_driver; |
| 177 | } |
| 178 | |
| 179 | static int ssl_console_setup(struct console *co, char *options) |
| 180 | { |
| 181 | struct line *line = &serial_lines[co->index]; |
| 182 | |
Jeff Dike | d50084a | 2006-01-06 00:18:50 -0800 | [diff] [blame] | 183 | return console_open_chan(line, co, &opts); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | } |
| 185 | |
| 186 | static struct console ssl_cons = { |
| 187 | .name = "ttyS", |
| 188 | .write = ssl_console_write, |
| 189 | .device = ssl_console_device, |
| 190 | .setup = ssl_console_setup, |
| 191 | .flags = CON_PRINTBUFFER, |
| 192 | .index = -1, |
| 193 | }; |
| 194 | |
| 195 | int ssl_init(void) |
| 196 | { |
| 197 | char *new_title; |
| 198 | |
Jeff Dike | d50084a | 2006-01-06 00:18:50 -0800 | [diff] [blame] | 199 | printk(KERN_INFO "Initializing software serial port version %d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | ssl_version); |
| 201 | ssl_driver = line_register_devfs(&lines, &driver, &ssl_ops, |
Jeff Dike | d50084a | 2006-01-06 00:18:50 -0800 | [diff] [blame] | 202 | serial_lines, |
| 203 | ARRAY_SIZE(serial_lines)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | |
Jeff Dike | 0834cc7 | 2006-01-06 00:18:51 -0800 | [diff] [blame] | 205 | lines_init(serial_lines, ARRAY_SIZE(serial_lines)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | |
| 207 | new_title = add_xterm_umid(opts.xterm_title); |
| 208 | if (new_title != NULL) |
| 209 | opts.xterm_title = new_title; |
| 210 | |
| 211 | ssl_init_done = 1; |
| 212 | register_console(&ssl_cons); |
Jeff Dike | d50084a | 2006-01-06 00:18:50 -0800 | [diff] [blame] | 213 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | } |
| 215 | late_initcall(ssl_init); |
| 216 | |
| 217 | static void ssl_exit(void) |
| 218 | { |
| 219 | if (!ssl_init_done) |
| 220 | return; |
Jeff Dike | 0834cc7 | 2006-01-06 00:18:51 -0800 | [diff] [blame] | 221 | close_lines(serial_lines, ARRAY_SIZE(serial_lines)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | } |
| 223 | __uml_exitcall(ssl_exit); |
| 224 | |
| 225 | static int ssl_chan_setup(char *str) |
| 226 | { |
Jeff Dike | 0834cc7 | 2006-01-06 00:18:51 -0800 | [diff] [blame] | 227 | return line_setup(serial_lines, ARRAY_SIZE(serial_lines), str, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | } |
| 229 | |
| 230 | __setup("ssl", ssl_chan_setup); |
| 231 | __channel_help(ssl_chan_setup, "ssl"); |