Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Stuff used by all variants of the driver |
| 3 | * |
Tilman Schmidt | 70440cf | 2006-04-10 22:55:14 -0700 | [diff] [blame] | 4 | * Copyright (c) 2001 by Stefan Eilers, |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 5 | * Hansjoerg Lipp <hjlipp@web.de>, |
| 6 | * Tilman Schmidt <tilman@imap.cc>. |
| 7 | * |
| 8 | * ===================================================================== |
| 9 | * This program is free software; you can redistribute it and/or |
| 10 | * modify it under the terms of the GNU General Public License as |
| 11 | * published by the Free Software Foundation; either version 2 of |
| 12 | * the License, or (at your option) any later version. |
| 13 | * ===================================================================== |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 14 | */ |
| 15 | |
| 16 | #include "gigaset.h" |
| 17 | #include <linux/ctype.h> |
| 18 | #include <linux/module.h> |
| 19 | #include <linux/moduleparam.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame^] | 20 | #include <linux/slab.h> |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 21 | |
| 22 | /* Version Information */ |
Tilman Schmidt | 70440cf | 2006-04-10 22:55:14 -0700 | [diff] [blame] | 23 | #define DRIVER_AUTHOR "Hansjoerg Lipp <hjlipp@web.de>, Tilman Schmidt <tilman@imap.cc>, Stefan Eilers" |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 24 | #define DRIVER_DESC "Driver for Gigaset 307x" |
| 25 | |
Tilman Schmidt | 2038724 | 2009-10-06 12:18:41 +0000 | [diff] [blame] | 26 | #ifdef CONFIG_GIGASET_DEBUG |
| 27 | #define DRIVER_DESC_DEBUG " (debug build)" |
| 28 | #else |
| 29 | #define DRIVER_DESC_DEBUG "" |
| 30 | #endif |
| 31 | |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 32 | /* Module parameters */ |
Tilman Schmidt | 073886f | 2009-12-05 08:04:16 +0000 | [diff] [blame] | 33 | int gigaset_debuglevel; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 34 | EXPORT_SYMBOL_GPL(gigaset_debuglevel); |
| 35 | module_param_named(debug, gigaset_debuglevel, int, S_IRUGO|S_IWUSR); |
| 36 | MODULE_PARM_DESC(debug, "debug level"); |
| 37 | |
Tilman Schmidt | 70440cf | 2006-04-10 22:55:14 -0700 | [diff] [blame] | 38 | /* driver state flags */ |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 39 | #define VALID_MINOR 0x01 |
| 40 | #define VALID_ID 0x02 |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 41 | |
Tilman Schmidt | 1cec972 | 2009-10-06 12:19:01 +0000 | [diff] [blame] | 42 | /** |
| 43 | * gigaset_dbg_buffer() - dump data in ASCII and hex for debugging |
| 44 | * @level: debugging level. |
| 45 | * @msg: message prefix. |
| 46 | * @len: number of bytes to dump. |
| 47 | * @buf: data to dump. |
| 48 | * |
| 49 | * If the current debugging level includes one of the bits set in @level, |
| 50 | * @len bytes starting at @buf are logged to dmesg at KERN_DEBUG prio, |
| 51 | * prefixed by the text @msg. |
| 52 | */ |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 53 | void gigaset_dbg_buffer(enum debuglevel level, const unsigned char *msg, |
Tilman Schmidt | 0137150 | 2006-04-10 22:55:11 -0700 | [diff] [blame] | 54 | size_t len, const unsigned char *buf) |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 55 | { |
| 56 | unsigned char outbuf[80]; |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 57 | unsigned char c; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 58 | size_t space = sizeof outbuf - 1; |
| 59 | unsigned char *out = outbuf; |
Tilman Schmidt | 0137150 | 2006-04-10 22:55:11 -0700 | [diff] [blame] | 60 | size_t numin = len; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 61 | |
Tilman Schmidt | 0137150 | 2006-04-10 22:55:11 -0700 | [diff] [blame] | 62 | while (numin--) { |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 63 | c = *buf++; |
| 64 | if (c == '~' || c == '^' || c == '\\') { |
Tilman Schmidt | 0137150 | 2006-04-10 22:55:11 -0700 | [diff] [blame] | 65 | if (!space--) |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 66 | break; |
| 67 | *out++ = '\\'; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 68 | } |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 69 | if (c & 0x80) { |
Tilman Schmidt | 0137150 | 2006-04-10 22:55:11 -0700 | [diff] [blame] | 70 | if (!space--) |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 71 | break; |
| 72 | *out++ = '~'; |
| 73 | c ^= 0x80; |
| 74 | } |
| 75 | if (c < 0x20 || c == 0x7f) { |
Tilman Schmidt | 0137150 | 2006-04-10 22:55:11 -0700 | [diff] [blame] | 76 | if (!space--) |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 77 | break; |
| 78 | *out++ = '^'; |
| 79 | c ^= 0x40; |
| 80 | } |
Tilman Schmidt | 0137150 | 2006-04-10 22:55:11 -0700 | [diff] [blame] | 81 | if (!space--) |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 82 | break; |
| 83 | *out++ = c; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 84 | } |
| 85 | *out = 0; |
| 86 | |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 87 | gig_dbg(level, "%s (%u bytes): %s", msg, (unsigned) len, outbuf); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 88 | } |
| 89 | EXPORT_SYMBOL_GPL(gigaset_dbg_buffer); |
| 90 | |
| 91 | static int setflags(struct cardstate *cs, unsigned flags, unsigned delay) |
| 92 | { |
| 93 | int r; |
| 94 | |
| 95 | r = cs->ops->set_modem_ctrl(cs, cs->control_state, flags); |
| 96 | cs->control_state = flags; |
| 97 | if (r < 0) |
| 98 | return r; |
| 99 | |
| 100 | if (delay) { |
| 101 | set_current_state(TASK_INTERRUPTIBLE); |
| 102 | schedule_timeout(delay * HZ / 1000); |
| 103 | } |
| 104 | |
| 105 | return 0; |
| 106 | } |
| 107 | |
| 108 | int gigaset_enterconfigmode(struct cardstate *cs) |
| 109 | { |
| 110 | int i, r; |
| 111 | |
Tilman Schmidt | d9ba9c9 | 2009-10-25 09:30:17 +0000 | [diff] [blame] | 112 | cs->control_state = TIOCM_RTS; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 113 | |
| 114 | r = setflags(cs, TIOCM_DTR, 200); |
| 115 | if (r < 0) |
| 116 | goto error; |
| 117 | r = setflags(cs, 0, 200); |
| 118 | if (r < 0) |
| 119 | goto error; |
| 120 | for (i = 0; i < 5; ++i) { |
| 121 | r = setflags(cs, TIOCM_RTS, 100); |
| 122 | if (r < 0) |
| 123 | goto error; |
| 124 | r = setflags(cs, 0, 100); |
| 125 | if (r < 0) |
| 126 | goto error; |
| 127 | } |
| 128 | r = setflags(cs, TIOCM_RTS|TIOCM_DTR, 800); |
| 129 | if (r < 0) |
| 130 | goto error; |
| 131 | |
| 132 | return 0; |
| 133 | |
| 134 | error: |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 135 | dev_err(cs->dev, "error %d on setuartbits\n", -r); |
Tilman Schmidt | d9ba9c9 | 2009-10-25 09:30:17 +0000 | [diff] [blame] | 136 | cs->control_state = TIOCM_RTS|TIOCM_DTR; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 137 | cs->ops->set_modem_ctrl(cs, 0, TIOCM_RTS|TIOCM_DTR); |
| 138 | |
Tilman Schmidt | d9ba9c9 | 2009-10-25 09:30:17 +0000 | [diff] [blame] | 139 | return -1; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 140 | } |
| 141 | |
| 142 | static int test_timeout(struct at_state_t *at_state) |
| 143 | { |
| 144 | if (!at_state->timer_expires) |
| 145 | return 0; |
| 146 | |
| 147 | if (--at_state->timer_expires) { |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 148 | gig_dbg(DEBUG_MCMD, "decreased timer of %p to %lu", |
| 149 | at_state, at_state->timer_expires); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 150 | return 0; |
| 151 | } |
| 152 | |
Tilman Schmidt | 1528b18 | 2010-02-22 13:09:52 +0000 | [diff] [blame] | 153 | gigaset_add_event(at_state->cs, at_state, EV_TIMEOUT, NULL, |
| 154 | at_state->timer_index, NULL); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 155 | return 1; |
| 156 | } |
| 157 | |
| 158 | static void timer_tick(unsigned long data) |
| 159 | { |
| 160 | struct cardstate *cs = (struct cardstate *) data; |
| 161 | unsigned long flags; |
| 162 | unsigned channel; |
| 163 | struct at_state_t *at_state; |
| 164 | int timeout = 0; |
| 165 | |
| 166 | spin_lock_irqsave(&cs->lock, flags); |
| 167 | |
| 168 | for (channel = 0; channel < cs->channels; ++channel) |
| 169 | if (test_timeout(&cs->bcs[channel].at_state)) |
| 170 | timeout = 1; |
| 171 | |
| 172 | if (test_timeout(&cs->at_state)) |
| 173 | timeout = 1; |
| 174 | |
| 175 | list_for_each_entry(at_state, &cs->temp_at_states, list) |
| 176 | if (test_timeout(at_state)) |
| 177 | timeout = 1; |
| 178 | |
Tilman Schmidt | 69049cc | 2006-04-10 22:55:16 -0700 | [diff] [blame] | 179 | if (cs->running) { |
Tilman Schmidt | ec81b5e6 | 2006-04-10 22:55:03 -0700 | [diff] [blame] | 180 | mod_timer(&cs->timer, jiffies + msecs_to_jiffies(GIG_TICK)); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 181 | if (timeout) { |
Tilman Schmidt | 1528b18 | 2010-02-22 13:09:52 +0000 | [diff] [blame] | 182 | gig_dbg(DEBUG_EVENT, "scheduling timeout"); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 183 | tasklet_schedule(&cs->event_tasklet); |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | spin_unlock_irqrestore(&cs->lock, flags); |
| 188 | } |
| 189 | |
| 190 | int gigaset_get_channel(struct bc_state *bcs) |
| 191 | { |
| 192 | unsigned long flags; |
| 193 | |
| 194 | spin_lock_irqsave(&bcs->cs->lock, flags); |
Tilman Schmidt | e468c04 | 2008-02-06 01:38:29 -0800 | [diff] [blame] | 195 | if (bcs->use_count || !try_module_get(bcs->cs->driver->owner)) { |
Tilman Schmidt | 1528b18 | 2010-02-22 13:09:52 +0000 | [diff] [blame] | 196 | gig_dbg(DEBUG_CHANNEL, "could not allocate channel %d", |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 197 | bcs->channel); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 198 | spin_unlock_irqrestore(&bcs->cs->lock, flags); |
| 199 | return 0; |
| 200 | } |
| 201 | ++bcs->use_count; |
| 202 | bcs->busy = 1; |
Tilman Schmidt | 1528b18 | 2010-02-22 13:09:52 +0000 | [diff] [blame] | 203 | gig_dbg(DEBUG_CHANNEL, "allocated channel %d", bcs->channel); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 204 | spin_unlock_irqrestore(&bcs->cs->lock, flags); |
| 205 | return 1; |
| 206 | } |
| 207 | |
Tilman Schmidt | 7bb5fdc | 2009-10-06 12:19:17 +0000 | [diff] [blame] | 208 | struct bc_state *gigaset_get_free_channel(struct cardstate *cs) |
| 209 | { |
| 210 | unsigned long flags; |
| 211 | int i; |
| 212 | |
| 213 | spin_lock_irqsave(&cs->lock, flags); |
| 214 | if (!try_module_get(cs->driver->owner)) { |
Tilman Schmidt | 1528b18 | 2010-02-22 13:09:52 +0000 | [diff] [blame] | 215 | gig_dbg(DEBUG_CHANNEL, |
Tilman Schmidt | 7bb5fdc | 2009-10-06 12:19:17 +0000 | [diff] [blame] | 216 | "could not get module for allocating channel"); |
| 217 | spin_unlock_irqrestore(&cs->lock, flags); |
| 218 | return NULL; |
| 219 | } |
| 220 | for (i = 0; i < cs->channels; ++i) |
| 221 | if (!cs->bcs[i].use_count) { |
| 222 | ++cs->bcs[i].use_count; |
| 223 | cs->bcs[i].busy = 1; |
| 224 | spin_unlock_irqrestore(&cs->lock, flags); |
Tilman Schmidt | 1528b18 | 2010-02-22 13:09:52 +0000 | [diff] [blame] | 225 | gig_dbg(DEBUG_CHANNEL, "allocated channel %d", i); |
Tilman Schmidt | 7bb5fdc | 2009-10-06 12:19:17 +0000 | [diff] [blame] | 226 | return cs->bcs + i; |
| 227 | } |
| 228 | module_put(cs->driver->owner); |
| 229 | spin_unlock_irqrestore(&cs->lock, flags); |
Tilman Schmidt | 1528b18 | 2010-02-22 13:09:52 +0000 | [diff] [blame] | 230 | gig_dbg(DEBUG_CHANNEL, "no free channel"); |
Tilman Schmidt | 7bb5fdc | 2009-10-06 12:19:17 +0000 | [diff] [blame] | 231 | return NULL; |
| 232 | } |
| 233 | |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 234 | void gigaset_free_channel(struct bc_state *bcs) |
| 235 | { |
| 236 | unsigned long flags; |
| 237 | |
| 238 | spin_lock_irqsave(&bcs->cs->lock, flags); |
| 239 | if (!bcs->busy) { |
Tilman Schmidt | 1528b18 | 2010-02-22 13:09:52 +0000 | [diff] [blame] | 240 | gig_dbg(DEBUG_CHANNEL, "could not free channel %d", |
| 241 | bcs->channel); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 242 | spin_unlock_irqrestore(&bcs->cs->lock, flags); |
| 243 | return; |
| 244 | } |
| 245 | --bcs->use_count; |
| 246 | bcs->busy = 0; |
Tilman Schmidt | e468c04 | 2008-02-06 01:38:29 -0800 | [diff] [blame] | 247 | module_put(bcs->cs->driver->owner); |
Tilman Schmidt | 1528b18 | 2010-02-22 13:09:52 +0000 | [diff] [blame] | 248 | gig_dbg(DEBUG_CHANNEL, "freed channel %d", bcs->channel); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 249 | spin_unlock_irqrestore(&bcs->cs->lock, flags); |
| 250 | } |
| 251 | |
| 252 | int gigaset_get_channels(struct cardstate *cs) |
| 253 | { |
| 254 | unsigned long flags; |
| 255 | int i; |
| 256 | |
| 257 | spin_lock_irqsave(&cs->lock, flags); |
| 258 | for (i = 0; i < cs->channels; ++i) |
| 259 | if (cs->bcs[i].use_count) { |
| 260 | spin_unlock_irqrestore(&cs->lock, flags); |
Tilman Schmidt | 1528b18 | 2010-02-22 13:09:52 +0000 | [diff] [blame] | 261 | gig_dbg(DEBUG_CHANNEL, |
| 262 | "could not allocate all channels"); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 263 | return 0; |
| 264 | } |
| 265 | for (i = 0; i < cs->channels; ++i) |
| 266 | ++cs->bcs[i].use_count; |
| 267 | spin_unlock_irqrestore(&cs->lock, flags); |
| 268 | |
Tilman Schmidt | 1528b18 | 2010-02-22 13:09:52 +0000 | [diff] [blame] | 269 | gig_dbg(DEBUG_CHANNEL, "allocated all channels"); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 270 | |
| 271 | return 1; |
| 272 | } |
| 273 | |
| 274 | void gigaset_free_channels(struct cardstate *cs) |
| 275 | { |
| 276 | unsigned long flags; |
| 277 | int i; |
| 278 | |
Tilman Schmidt | 1528b18 | 2010-02-22 13:09:52 +0000 | [diff] [blame] | 279 | gig_dbg(DEBUG_CHANNEL, "unblocking all channels"); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 280 | spin_lock_irqsave(&cs->lock, flags); |
| 281 | for (i = 0; i < cs->channels; ++i) |
| 282 | --cs->bcs[i].use_count; |
| 283 | spin_unlock_irqrestore(&cs->lock, flags); |
| 284 | } |
| 285 | |
| 286 | void gigaset_block_channels(struct cardstate *cs) |
| 287 | { |
| 288 | unsigned long flags; |
| 289 | int i; |
| 290 | |
Tilman Schmidt | 1528b18 | 2010-02-22 13:09:52 +0000 | [diff] [blame] | 291 | gig_dbg(DEBUG_CHANNEL, "blocking all channels"); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 292 | spin_lock_irqsave(&cs->lock, flags); |
| 293 | for (i = 0; i < cs->channels; ++i) |
| 294 | ++cs->bcs[i].use_count; |
| 295 | spin_unlock_irqrestore(&cs->lock, flags); |
| 296 | } |
| 297 | |
| 298 | static void clear_events(struct cardstate *cs) |
| 299 | { |
| 300 | struct event_t *ev; |
| 301 | unsigned head, tail; |
Tilman Schmidt | 69049cc | 2006-04-10 22:55:16 -0700 | [diff] [blame] | 302 | unsigned long flags; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 303 | |
Tilman Schmidt | 69049cc | 2006-04-10 22:55:16 -0700 | [diff] [blame] | 304 | spin_lock_irqsave(&cs->ev_lock, flags); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 305 | |
Tilman Schmidt | 69049cc | 2006-04-10 22:55:16 -0700 | [diff] [blame] | 306 | head = cs->ev_head; |
| 307 | tail = cs->ev_tail; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 308 | |
| 309 | while (tail != head) { |
| 310 | ev = cs->events + head; |
| 311 | kfree(ev->ptr); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 312 | head = (head + 1) % MAX_EVENTS; |
| 313 | } |
| 314 | |
Tilman Schmidt | 69049cc | 2006-04-10 22:55:16 -0700 | [diff] [blame] | 315 | cs->ev_head = tail; |
| 316 | |
| 317 | spin_unlock_irqrestore(&cs->ev_lock, flags); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 318 | } |
| 319 | |
Tilman Schmidt | 1cec972 | 2009-10-06 12:19:01 +0000 | [diff] [blame] | 320 | /** |
| 321 | * gigaset_add_event() - add event to device event queue |
| 322 | * @cs: device descriptor structure. |
| 323 | * @at_state: connection state structure. |
| 324 | * @type: event type. |
| 325 | * @ptr: pointer parameter for event. |
| 326 | * @parameter: integer parameter for event. |
| 327 | * @arg: pointer parameter for event. |
| 328 | * |
| 329 | * Allocate an event queue entry from the device's event queue, and set it up |
| 330 | * with the parameters given. |
| 331 | * |
| 332 | * Return value: added event |
| 333 | */ |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 334 | struct event_t *gigaset_add_event(struct cardstate *cs, |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 335 | struct at_state_t *at_state, int type, |
| 336 | void *ptr, int parameter, void *arg) |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 337 | { |
| 338 | unsigned long flags; |
| 339 | unsigned next, tail; |
| 340 | struct event_t *event = NULL; |
| 341 | |
Tilman Schmidt | 1528b18 | 2010-02-22 13:09:52 +0000 | [diff] [blame] | 342 | gig_dbg(DEBUG_EVENT, "queueing event %d", type); |
| 343 | |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 344 | spin_lock_irqsave(&cs->ev_lock, flags); |
| 345 | |
Tilman Schmidt | 69049cc | 2006-04-10 22:55:16 -0700 | [diff] [blame] | 346 | tail = cs->ev_tail; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 347 | next = (tail + 1) % MAX_EVENTS; |
Tilman Schmidt | 69049cc | 2006-04-10 22:55:16 -0700 | [diff] [blame] | 348 | if (unlikely(next == cs->ev_head)) |
Tilman Schmidt | 5002779 | 2008-07-23 21:28:27 -0700 | [diff] [blame] | 349 | dev_err(cs->dev, "event queue full\n"); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 350 | else { |
| 351 | event = cs->events + tail; |
| 352 | event->type = type; |
| 353 | event->at_state = at_state; |
| 354 | event->cid = -1; |
| 355 | event->ptr = ptr; |
| 356 | event->arg = arg; |
| 357 | event->parameter = parameter; |
Tilman Schmidt | 69049cc | 2006-04-10 22:55:16 -0700 | [diff] [blame] | 358 | cs->ev_tail = next; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 359 | } |
| 360 | |
| 361 | spin_unlock_irqrestore(&cs->ev_lock, flags); |
| 362 | |
| 363 | return event; |
| 364 | } |
| 365 | EXPORT_SYMBOL_GPL(gigaset_add_event); |
| 366 | |
| 367 | static void free_strings(struct at_state_t *at_state) |
| 368 | { |
| 369 | int i; |
| 370 | |
| 371 | for (i = 0; i < STR_NUM; ++i) { |
| 372 | kfree(at_state->str_var[i]); |
| 373 | at_state->str_var[i] = NULL; |
| 374 | } |
| 375 | } |
| 376 | |
| 377 | static void clear_at_state(struct at_state_t *at_state) |
| 378 | { |
| 379 | free_strings(at_state); |
| 380 | } |
| 381 | |
| 382 | static void dealloc_at_states(struct cardstate *cs) |
| 383 | { |
| 384 | struct at_state_t *cur, *next; |
| 385 | |
| 386 | list_for_each_entry_safe(cur, next, &cs->temp_at_states, list) { |
| 387 | list_del(&cur->list); |
| 388 | free_strings(cur); |
| 389 | kfree(cur); |
| 390 | } |
| 391 | } |
| 392 | |
| 393 | static void gigaset_freebcs(struct bc_state *bcs) |
| 394 | { |
| 395 | int i; |
| 396 | |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 397 | gig_dbg(DEBUG_INIT, "freeing bcs[%d]->hw", bcs->channel); |
Tilman Schmidt | d9ba9c9 | 2009-10-25 09:30:17 +0000 | [diff] [blame] | 398 | if (!bcs->cs->ops->freebcshw(bcs)) |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 399 | gig_dbg(DEBUG_INIT, "failed"); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 400 | |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 401 | gig_dbg(DEBUG_INIT, "clearing bcs[%d]->at_state", bcs->channel); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 402 | clear_at_state(&bcs->at_state); |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 403 | gig_dbg(DEBUG_INIT, "freeing bcs[%d]->skb", bcs->channel); |
Tilman Schmidt | 2032e2c | 2009-10-25 09:30:07 +0000 | [diff] [blame] | 404 | dev_kfree_skb(bcs->skb); |
| 405 | bcs->skb = NULL; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 406 | |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 407 | for (i = 0; i < AT_NUM; ++i) { |
| 408 | kfree(bcs->commands[i]); |
| 409 | bcs->commands[i] = NULL; |
| 410 | } |
| 411 | } |
| 412 | |
Tilman Schmidt | 70440cf | 2006-04-10 22:55:14 -0700 | [diff] [blame] | 413 | static struct cardstate *alloc_cs(struct gigaset_driver *drv) |
| 414 | { |
| 415 | unsigned long flags; |
| 416 | unsigned i; |
Tilman Schmidt | e468c04 | 2008-02-06 01:38:29 -0800 | [diff] [blame] | 417 | struct cardstate *cs; |
Tilman Schmidt | e702ff0 | 2007-01-26 00:56:56 -0800 | [diff] [blame] | 418 | struct cardstate *ret = NULL; |
Tilman Schmidt | 70440cf | 2006-04-10 22:55:14 -0700 | [diff] [blame] | 419 | |
| 420 | spin_lock_irqsave(&drv->lock, flags); |
Tilman Schmidt | e468c04 | 2008-02-06 01:38:29 -0800 | [diff] [blame] | 421 | if (drv->blocked) |
| 422 | goto exit; |
Tilman Schmidt | 70440cf | 2006-04-10 22:55:14 -0700 | [diff] [blame] | 423 | for (i = 0; i < drv->minors; ++i) { |
Tilman Schmidt | e468c04 | 2008-02-06 01:38:29 -0800 | [diff] [blame] | 424 | cs = drv->cs + i; |
| 425 | if (!(cs->flags & VALID_MINOR)) { |
| 426 | cs->flags = VALID_MINOR; |
| 427 | ret = cs; |
Tilman Schmidt | 70440cf | 2006-04-10 22:55:14 -0700 | [diff] [blame] | 428 | break; |
Tilman Schmidt | e702ff0 | 2007-01-26 00:56:56 -0800 | [diff] [blame] | 429 | } |
Tilman Schmidt | 70440cf | 2006-04-10 22:55:14 -0700 | [diff] [blame] | 430 | } |
Tilman Schmidt | e468c04 | 2008-02-06 01:38:29 -0800 | [diff] [blame] | 431 | exit: |
Tilman Schmidt | 70440cf | 2006-04-10 22:55:14 -0700 | [diff] [blame] | 432 | spin_unlock_irqrestore(&drv->lock, flags); |
| 433 | return ret; |
| 434 | } |
| 435 | |
| 436 | static void free_cs(struct cardstate *cs) |
| 437 | { |
Tilman Schmidt | e468c04 | 2008-02-06 01:38:29 -0800 | [diff] [blame] | 438 | cs->flags = 0; |
Tilman Schmidt | 70440cf | 2006-04-10 22:55:14 -0700 | [diff] [blame] | 439 | } |
| 440 | |
| 441 | static void make_valid(struct cardstate *cs, unsigned mask) |
| 442 | { |
| 443 | unsigned long flags; |
| 444 | struct gigaset_driver *drv = cs->driver; |
| 445 | spin_lock_irqsave(&drv->lock, flags); |
Tilman Schmidt | e468c04 | 2008-02-06 01:38:29 -0800 | [diff] [blame] | 446 | cs->flags |= mask; |
Tilman Schmidt | 70440cf | 2006-04-10 22:55:14 -0700 | [diff] [blame] | 447 | spin_unlock_irqrestore(&drv->lock, flags); |
| 448 | } |
| 449 | |
| 450 | static void make_invalid(struct cardstate *cs, unsigned mask) |
| 451 | { |
| 452 | unsigned long flags; |
| 453 | struct gigaset_driver *drv = cs->driver; |
| 454 | spin_lock_irqsave(&drv->lock, flags); |
Tilman Schmidt | e468c04 | 2008-02-06 01:38:29 -0800 | [diff] [blame] | 455 | cs->flags &= ~mask; |
Tilman Schmidt | 70440cf | 2006-04-10 22:55:14 -0700 | [diff] [blame] | 456 | spin_unlock_irqrestore(&drv->lock, flags); |
| 457 | } |
| 458 | |
Tilman Schmidt | 1cec972 | 2009-10-06 12:19:01 +0000 | [diff] [blame] | 459 | /** |
| 460 | * gigaset_freecs() - free all associated ressources of a device |
| 461 | * @cs: device descriptor structure. |
| 462 | * |
| 463 | * Stops all tasklets and timers, unregisters the device from all |
| 464 | * subsystems it was registered to, deallocates the device structure |
| 465 | * @cs and all structures referenced from it. |
| 466 | * Operations on the device should be stopped before calling this. |
| 467 | */ |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 468 | void gigaset_freecs(struct cardstate *cs) |
| 469 | { |
| 470 | int i; |
| 471 | unsigned long flags; |
| 472 | |
| 473 | if (!cs) |
| 474 | return; |
| 475 | |
Tilman Schmidt | abfd1dc | 2006-04-10 22:55:12 -0700 | [diff] [blame] | 476 | mutex_lock(&cs->mutex); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 477 | |
| 478 | if (!cs->bcs) |
| 479 | goto f_cs; |
| 480 | if (!cs->inbuf) |
| 481 | goto f_bcs; |
| 482 | |
| 483 | spin_lock_irqsave(&cs->lock, flags); |
Tilman Schmidt | 69049cc | 2006-04-10 22:55:16 -0700 | [diff] [blame] | 484 | cs->running = 0; |
Tilman Schmidt | 917f508 | 2006-04-10 22:55:00 -0700 | [diff] [blame] | 485 | spin_unlock_irqrestore(&cs->lock, flags); /* event handler and timer are |
| 486 | not rescheduled below */ |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 487 | |
| 488 | tasklet_kill(&cs->event_tasklet); |
| 489 | del_timer_sync(&cs->timer); |
| 490 | |
| 491 | switch (cs->cs_init) { |
| 492 | default: |
Tilman Schmidt | 088ec0c | 2009-10-06 12:19:07 +0000 | [diff] [blame] | 493 | /* clear B channel structures */ |
| 494 | for (i = 0; i < cs->channels; ++i) { |
| 495 | gig_dbg(DEBUG_INIT, "clearing bcs[%d]", i); |
| 496 | gigaset_freebcs(cs->bcs + i); |
| 497 | } |
| 498 | |
Hansjoerg Lipp | 3dda4e3 | 2006-04-22 18:43:00 +0200 | [diff] [blame] | 499 | /* clear device sysfs */ |
| 500 | gigaset_free_dev_sysfs(cs); |
| 501 | |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 502 | gigaset_if_free(cs); |
| 503 | |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 504 | gig_dbg(DEBUG_INIT, "clearing hw"); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 505 | cs->ops->freecshw(cs); |
| 506 | |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 507 | /* fall through */ |
| 508 | case 2: /* error in initcshw */ |
| 509 | /* Deregister from LL */ |
| 510 | make_invalid(cs, VALID_ID); |
Tilman Schmidt | bc35b4e | 2010-03-14 12:58:05 +0000 | [diff] [blame] | 511 | gigaset_isdn_unregdev(cs); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 512 | |
| 513 | /* fall through */ |
Tilman Schmidt | 088ec0c | 2009-10-06 12:19:07 +0000 | [diff] [blame] | 514 | case 1: /* error when registering to LL */ |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 515 | gig_dbg(DEBUG_INIT, "clearing at_state"); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 516 | clear_at_state(&cs->at_state); |
| 517 | dealloc_at_states(cs); |
| 518 | |
| 519 | /* fall through */ |
Tilman Schmidt | 088ec0c | 2009-10-06 12:19:07 +0000 | [diff] [blame] | 520 | case 0: /* error in basic setup */ |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 521 | clear_events(cs); |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 522 | gig_dbg(DEBUG_INIT, "freeing inbuf"); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 523 | kfree(cs->inbuf); |
| 524 | } |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 525 | f_bcs: gig_dbg(DEBUG_INIT, "freeing bcs[]"); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 526 | kfree(cs->bcs); |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 527 | f_cs: gig_dbg(DEBUG_INIT, "freeing cs"); |
Tilman Schmidt | abfd1dc | 2006-04-10 22:55:12 -0700 | [diff] [blame] | 528 | mutex_unlock(&cs->mutex); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 529 | free_cs(cs); |
| 530 | } |
| 531 | EXPORT_SYMBOL_GPL(gigaset_freecs); |
| 532 | |
| 533 | void gigaset_at_init(struct at_state_t *at_state, struct bc_state *bcs, |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 534 | struct cardstate *cs, int cid) |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 535 | { |
| 536 | int i; |
| 537 | |
| 538 | INIT_LIST_HEAD(&at_state->list); |
| 539 | at_state->waiting = 0; |
| 540 | at_state->getstring = 0; |
| 541 | at_state->pending_commands = 0; |
| 542 | at_state->timer_expires = 0; |
| 543 | at_state->timer_active = 0; |
Tilman Schmidt | 69049cc | 2006-04-10 22:55:16 -0700 | [diff] [blame] | 544 | at_state->timer_index = 0; |
| 545 | at_state->seq_index = 0; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 546 | at_state->ConState = 0; |
| 547 | for (i = 0; i < STR_NUM; ++i) |
| 548 | at_state->str_var[i] = NULL; |
| 549 | at_state->int_var[VAR_ZDLE] = 0; |
| 550 | at_state->int_var[VAR_ZCTP] = -1; |
| 551 | at_state->int_var[VAR_ZSAU] = ZSAU_NULL; |
| 552 | at_state->cs = cs; |
| 553 | at_state->bcs = bcs; |
| 554 | at_state->cid = cid; |
| 555 | if (!cid) |
| 556 | at_state->replystruct = cs->tabnocid; |
| 557 | else |
| 558 | at_state->replystruct = cs->tabcid; |
| 559 | } |
| 560 | |
| 561 | |
Tilman Schmidt | 2032e2c | 2009-10-25 09:30:07 +0000 | [diff] [blame] | 562 | static void gigaset_inbuf_init(struct inbuf_t *inbuf, struct cardstate *cs) |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 563 | /* inbuf->read must be allocated before! */ |
| 564 | { |
Tilman Schmidt | 9d4bee2 | 2008-02-06 01:38:28 -0800 | [diff] [blame] | 565 | inbuf->head = 0; |
| 566 | inbuf->tail = 0; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 567 | inbuf->cs = cs; |
Tilman Schmidt | 2032e2c | 2009-10-25 09:30:07 +0000 | [diff] [blame] | 568 | inbuf->inputstate = INS_command; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 569 | } |
| 570 | |
Tilman Schmidt | 1cec972 | 2009-10-06 12:19:01 +0000 | [diff] [blame] | 571 | /** |
| 572 | * gigaset_fill_inbuf() - append received data to input buffer |
| 573 | * @inbuf: buffer structure. |
| 574 | * @src: received data. |
| 575 | * @numbytes: number of bytes received. |
| 576 | */ |
Tilman Schmidt | 714e823 | 2006-04-10 22:55:09 -0700 | [diff] [blame] | 577 | int gigaset_fill_inbuf(struct inbuf_t *inbuf, const unsigned char *src, |
| 578 | unsigned numbytes) |
| 579 | { |
| 580 | unsigned n, head, tail, bytesleft; |
| 581 | |
| 582 | gig_dbg(DEBUG_INTR, "received %u bytes", numbytes); |
| 583 | |
| 584 | if (!numbytes) |
| 585 | return 0; |
| 586 | |
| 587 | bytesleft = numbytes; |
Tilman Schmidt | 9d4bee2 | 2008-02-06 01:38:28 -0800 | [diff] [blame] | 588 | tail = inbuf->tail; |
| 589 | head = inbuf->head; |
Tilman Schmidt | 714e823 | 2006-04-10 22:55:09 -0700 | [diff] [blame] | 590 | gig_dbg(DEBUG_INTR, "buffer state: %u -> %u", head, tail); |
| 591 | |
| 592 | while (bytesleft) { |
| 593 | if (head > tail) |
| 594 | n = head - 1 - tail; |
| 595 | else if (head == 0) |
| 596 | n = (RBUFSIZE-1) - tail; |
| 597 | else |
| 598 | n = RBUFSIZE - tail; |
| 599 | if (!n) { |
| 600 | dev_err(inbuf->cs->dev, |
Joe Perches | 898eb71 | 2007-10-18 03:06:30 -0700 | [diff] [blame] | 601 | "buffer overflow (%u bytes lost)\n", |
| 602 | bytesleft); |
Tilman Schmidt | 714e823 | 2006-04-10 22:55:09 -0700 | [diff] [blame] | 603 | break; |
| 604 | } |
| 605 | if (n > bytesleft) |
| 606 | n = bytesleft; |
| 607 | memcpy(inbuf->data + tail, src, n); |
| 608 | bytesleft -= n; |
| 609 | tail = (tail + n) % RBUFSIZE; |
| 610 | src += n; |
| 611 | } |
| 612 | gig_dbg(DEBUG_INTR, "setting tail to %u", tail); |
Tilman Schmidt | 9d4bee2 | 2008-02-06 01:38:28 -0800 | [diff] [blame] | 613 | inbuf->tail = tail; |
Tilman Schmidt | 714e823 | 2006-04-10 22:55:09 -0700 | [diff] [blame] | 614 | return numbytes != bytesleft; |
| 615 | } |
| 616 | EXPORT_SYMBOL_GPL(gigaset_fill_inbuf); |
| 617 | |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 618 | /* Initialize the b-channel structure */ |
| 619 | static struct bc_state *gigaset_initbcs(struct bc_state *bcs, |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 620 | struct cardstate *cs, int channel) |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 621 | { |
| 622 | int i; |
| 623 | |
Tilman Schmidt | d9ba9c9 | 2009-10-25 09:30:17 +0000 | [diff] [blame] | 624 | bcs->tx_skb = NULL; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 625 | |
| 626 | skb_queue_head_init(&bcs->squeue); |
| 627 | |
| 628 | bcs->corrupted = 0; |
| 629 | bcs->trans_down = 0; |
| 630 | bcs->trans_up = 0; |
| 631 | |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 632 | gig_dbg(DEBUG_INIT, "setting up bcs[%d]->at_state", channel); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 633 | gigaset_at_init(&bcs->at_state, bcs, cs, -1); |
| 634 | |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 635 | #ifdef CONFIG_GIGASET_DEBUG |
| 636 | bcs->emptycount = 0; |
| 637 | #endif |
| 638 | |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 639 | gig_dbg(DEBUG_INIT, "allocating bcs[%d]->skb", channel); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 640 | bcs->fcs = PPP_INITFCS; |
| 641 | bcs->inputstate = 0; |
| 642 | if (cs->ignoreframes) { |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 643 | bcs->skb = NULL; |
Tilman Schmidt | 088ec0c | 2009-10-06 12:19:07 +0000 | [diff] [blame] | 644 | } else { |
| 645 | bcs->skb = dev_alloc_skb(SBUFSIZE + cs->hw_hdr_len); |
| 646 | if (bcs->skb != NULL) |
| 647 | skb_reserve(bcs->skb, cs->hw_hdr_len); |
Tilman Schmidt | 2032e2c | 2009-10-25 09:30:07 +0000 | [diff] [blame] | 648 | else |
Tilman Schmidt | 088ec0c | 2009-10-06 12:19:07 +0000 | [diff] [blame] | 649 | pr_err("out of memory\n"); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 650 | } |
| 651 | |
| 652 | bcs->channel = channel; |
| 653 | bcs->cs = cs; |
| 654 | |
| 655 | bcs->chstate = 0; |
| 656 | bcs->use_count = 1; |
| 657 | bcs->busy = 0; |
| 658 | bcs->ignore = cs->ignoreframes; |
| 659 | |
| 660 | for (i = 0; i < AT_NUM; ++i) |
| 661 | bcs->commands[i] = NULL; |
| 662 | |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 663 | gig_dbg(DEBUG_INIT, " setting up bcs[%d]->hw", channel); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 664 | if (cs->ops->initbcshw(bcs)) |
| 665 | return bcs; |
| 666 | |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 667 | gig_dbg(DEBUG_INIT, " failed"); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 668 | |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 669 | gig_dbg(DEBUG_INIT, " freeing bcs[%d]->skb", channel); |
Tilman Schmidt | 2032e2c | 2009-10-25 09:30:07 +0000 | [diff] [blame] | 670 | dev_kfree_skb(bcs->skb); |
| 671 | bcs->skb = NULL; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 672 | |
| 673 | return NULL; |
| 674 | } |
| 675 | |
Tilman Schmidt | 1cec972 | 2009-10-06 12:19:01 +0000 | [diff] [blame] | 676 | /** |
| 677 | * gigaset_initcs() - initialize device structure |
| 678 | * @drv: hardware driver the device belongs to |
| 679 | * @channels: number of B channels supported by device |
| 680 | * @onechannel: !=0 if B channel data and AT commands share one |
| 681 | * communication channel (M10x), |
| 682 | * ==0 if B channels have separate communication channels (base) |
| 683 | * @ignoreframes: number of frames to ignore after setting up B channel |
| 684 | * @cidmode: !=0: start in CallID mode |
| 685 | * @modulename: name of driver module for LL registration |
| 686 | * |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 687 | * Allocate and initialize cardstate structure for Gigaset driver |
| 688 | * Calls hardware dependent gigaset_initcshw() function |
| 689 | * Calls B channel initialization function gigaset_initbcs() for each B channel |
Tilman Schmidt | 1cec972 | 2009-10-06 12:19:01 +0000 | [diff] [blame] | 690 | * |
| 691 | * Return value: |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 692 | * pointer to cardstate structure |
| 693 | */ |
| 694 | struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels, |
| 695 | int onechannel, int ignoreframes, |
| 696 | int cidmode, const char *modulename) |
| 697 | { |
Tilman Schmidt | d9ba9c9 | 2009-10-25 09:30:17 +0000 | [diff] [blame] | 698 | struct cardstate *cs; |
Tilman Schmidt | 69049cc | 2006-04-10 22:55:16 -0700 | [diff] [blame] | 699 | unsigned long flags; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 700 | int i; |
| 701 | |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 702 | gig_dbg(DEBUG_INIT, "allocating cs"); |
Tilman Schmidt | d9ba9c9 | 2009-10-25 09:30:17 +0000 | [diff] [blame] | 703 | cs = alloc_cs(drv); |
| 704 | if (!cs) { |
Tilman Schmidt | c8770dc | 2008-12-26 01:21:29 -0800 | [diff] [blame] | 705 | pr_err("maximum number of devices exceeded\n"); |
Tilman Schmidt | e702ff0 | 2007-01-26 00:56:56 -0800 | [diff] [blame] | 706 | return NULL; |
| 707 | } |
Tilman Schmidt | e702ff0 | 2007-01-26 00:56:56 -0800 | [diff] [blame] | 708 | |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 709 | gig_dbg(DEBUG_INIT, "allocating bcs[0..%d]", channels - 1); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 710 | cs->bcs = kmalloc(channels * sizeof(struct bc_state), GFP_KERNEL); |
Tilman Schmidt | e702ff0 | 2007-01-26 00:56:56 -0800 | [diff] [blame] | 711 | if (!cs->bcs) { |
Tilman Schmidt | c8770dc | 2008-12-26 01:21:29 -0800 | [diff] [blame] | 712 | pr_err("out of memory\n"); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 713 | goto error; |
Tilman Schmidt | e702ff0 | 2007-01-26 00:56:56 -0800 | [diff] [blame] | 714 | } |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 715 | gig_dbg(DEBUG_INIT, "allocating inbuf"); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 716 | cs->inbuf = kmalloc(sizeof(struct inbuf_t), GFP_KERNEL); |
Tilman Schmidt | e702ff0 | 2007-01-26 00:56:56 -0800 | [diff] [blame] | 717 | if (!cs->inbuf) { |
Tilman Schmidt | c8770dc | 2008-12-26 01:21:29 -0800 | [diff] [blame] | 718 | pr_err("out of memory\n"); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 719 | goto error; |
Tilman Schmidt | e702ff0 | 2007-01-26 00:56:56 -0800 | [diff] [blame] | 720 | } |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 721 | |
| 722 | cs->cs_init = 0; |
| 723 | cs->channels = channels; |
| 724 | cs->onechannel = onechannel; |
| 725 | cs->ignoreframes = ignoreframes; |
| 726 | INIT_LIST_HEAD(&cs->temp_at_states); |
Tilman Schmidt | 69049cc | 2006-04-10 22:55:16 -0700 | [diff] [blame] | 727 | cs->running = 0; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 728 | init_timer(&cs->timer); /* clear next & prev */ |
| 729 | spin_lock_init(&cs->ev_lock); |
Tilman Schmidt | 69049cc | 2006-04-10 22:55:16 -0700 | [diff] [blame] | 730 | cs->ev_tail = 0; |
| 731 | cs->ev_head = 0; |
Tilman Schmidt | abfd1dc | 2006-04-10 22:55:12 -0700 | [diff] [blame] | 732 | |
Joe Perches | 5452fee | 2009-11-19 09:55:53 +0000 | [diff] [blame] | 733 | tasklet_init(&cs->event_tasklet, gigaset_handle_event, |
Tilman Schmidt | 917f508 | 2006-04-10 22:55:00 -0700 | [diff] [blame] | 734 | (unsigned long) cs); |
Tilman Schmidt | 9d4bee2 | 2008-02-06 01:38:28 -0800 | [diff] [blame] | 735 | cs->commands_pending = 0; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 736 | cs->cur_at_seq = 0; |
| 737 | cs->gotfwver = -1; |
| 738 | cs->open_count = 0; |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 739 | cs->dev = NULL; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 740 | cs->tty = NULL; |
Greg Kroah-Hartman | 01107d3 | 2006-08-07 22:19:37 -0700 | [diff] [blame] | 741 | cs->tty_dev = NULL; |
Tilman Schmidt | 69049cc | 2006-04-10 22:55:16 -0700 | [diff] [blame] | 742 | cs->cidmode = cidmode != 0; |
Tilman Schmidt | 528efc6 | 2009-05-13 12:44:17 +0000 | [diff] [blame] | 743 | cs->tabnocid = gigaset_tab_nocid; |
| 744 | cs->tabcid = gigaset_tab_cid; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 745 | |
| 746 | init_waitqueue_head(&cs->waitqueue); |
| 747 | cs->waiting = 0; |
| 748 | |
Tilman Schmidt | 9d4bee2 | 2008-02-06 01:38:28 -0800 | [diff] [blame] | 749 | cs->mode = M_UNKNOWN; |
| 750 | cs->mstate = MS_UNINITIALIZED; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 751 | |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 752 | ++cs->cs_init; |
| 753 | |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 754 | gig_dbg(DEBUG_INIT, "setting up at_state"); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 755 | spin_lock_init(&cs->lock); |
| 756 | gigaset_at_init(&cs->at_state, NULL, cs, 0); |
| 757 | cs->dle = 0; |
| 758 | cs->cbytes = 0; |
| 759 | |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 760 | gig_dbg(DEBUG_INIT, "setting up inbuf"); |
Tilman Schmidt | 2032e2c | 2009-10-25 09:30:07 +0000 | [diff] [blame] | 761 | gigaset_inbuf_init(cs->inbuf, cs); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 762 | |
Tilman Schmidt | 69049cc | 2006-04-10 22:55:16 -0700 | [diff] [blame] | 763 | cs->connected = 0; |
| 764 | cs->isdn_up = 0; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 765 | |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 766 | gig_dbg(DEBUG_INIT, "setting up cmdbuf"); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 767 | cs->cmdbuf = cs->lastcmdbuf = NULL; |
| 768 | spin_lock_init(&cs->cmdlock); |
| 769 | cs->curlen = 0; |
| 770 | cs->cmdbytes = 0; |
| 771 | |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 772 | gig_dbg(DEBUG_INIT, "setting up iif"); |
Tilman Schmidt | bc35b4e | 2010-03-14 12:58:05 +0000 | [diff] [blame] | 773 | if (!gigaset_isdn_regdev(cs, modulename)) { |
Tilman Schmidt | c8770dc | 2008-12-26 01:21:29 -0800 | [diff] [blame] | 774 | pr_err("error registering ISDN device\n"); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 775 | goto error; |
| 776 | } |
| 777 | |
| 778 | make_valid(cs, VALID_ID); |
| 779 | ++cs->cs_init; |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 780 | gig_dbg(DEBUG_INIT, "setting up hw"); |
Tilman Schmidt | c8770dc | 2008-12-26 01:21:29 -0800 | [diff] [blame] | 781 | if (!cs->ops->initcshw(cs)) |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 782 | goto error; |
| 783 | |
| 784 | ++cs->cs_init; |
| 785 | |
Tilman Schmidt | 7435f50 | 2007-02-12 00:52:24 -0800 | [diff] [blame] | 786 | /* set up character device */ |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 787 | gigaset_if_init(cs); |
| 788 | |
Hansjoerg Lipp | 3dda4e3 | 2006-04-22 18:43:00 +0200 | [diff] [blame] | 789 | /* set up device sysfs */ |
| 790 | gigaset_init_dev_sysfs(cs); |
| 791 | |
Tilman Schmidt | 088ec0c | 2009-10-06 12:19:07 +0000 | [diff] [blame] | 792 | /* set up channel data structures */ |
| 793 | for (i = 0; i < channels; ++i) { |
| 794 | gig_dbg(DEBUG_INIT, "setting up bcs[%d]", i); |
| 795 | if (!gigaset_initbcs(cs->bcs + i, cs, i)) { |
| 796 | pr_err("could not allocate channel %d data\n", i); |
| 797 | goto error; |
| 798 | } |
| 799 | } |
| 800 | |
Tilman Schmidt | 69049cc | 2006-04-10 22:55:16 -0700 | [diff] [blame] | 801 | spin_lock_irqsave(&cs->lock, flags); |
| 802 | cs->running = 1; |
| 803 | spin_unlock_irqrestore(&cs->lock, flags); |
Tilman Schmidt | ec81b5e6 | 2006-04-10 22:55:03 -0700 | [diff] [blame] | 804 | setup_timer(&cs->timer, timer_tick, (unsigned long) cs); |
| 805 | cs->timer.expires = jiffies + msecs_to_jiffies(GIG_TICK); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 806 | /* FIXME: can jiffies increase too much until the timer is added? |
| 807 | * Same problem(?) with mod_timer() in timer_tick(). */ |
| 808 | add_timer(&cs->timer); |
| 809 | |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 810 | gig_dbg(DEBUG_INIT, "cs initialized"); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 811 | return cs; |
| 812 | |
Tilman Schmidt | e702ff0 | 2007-01-26 00:56:56 -0800 | [diff] [blame] | 813 | error: |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 814 | gig_dbg(DEBUG_INIT, "failed"); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 815 | gigaset_freecs(cs); |
| 816 | return NULL; |
| 817 | } |
| 818 | EXPORT_SYMBOL_GPL(gigaset_initcs); |
| 819 | |
Tilman Schmidt | 73a8881 | 2006-04-22 02:35:30 -0700 | [diff] [blame] | 820 | /* ReInitialize the b-channel structure on hangup */ |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 821 | void gigaset_bcs_reinit(struct bc_state *bcs) |
| 822 | { |
| 823 | struct sk_buff *skb; |
| 824 | struct cardstate *cs = bcs->cs; |
| 825 | unsigned long flags; |
| 826 | |
| 827 | while ((skb = skb_dequeue(&bcs->squeue)) != NULL) |
| 828 | dev_kfree_skb(skb); |
| 829 | |
Tilman Schmidt | 917f508 | 2006-04-10 22:55:00 -0700 | [diff] [blame] | 830 | spin_lock_irqsave(&cs->lock, flags); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 831 | clear_at_state(&bcs->at_state); |
| 832 | bcs->at_state.ConState = 0; |
| 833 | bcs->at_state.timer_active = 0; |
| 834 | bcs->at_state.timer_expires = 0; |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 835 | bcs->at_state.cid = -1; /* No CID defined */ |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 836 | spin_unlock_irqrestore(&cs->lock, flags); |
| 837 | |
| 838 | bcs->inputstate = 0; |
| 839 | |
| 840 | #ifdef CONFIG_GIGASET_DEBUG |
| 841 | bcs->emptycount = 0; |
| 842 | #endif |
| 843 | |
| 844 | bcs->fcs = PPP_INITFCS; |
| 845 | bcs->chstate = 0; |
| 846 | |
| 847 | bcs->ignore = cs->ignoreframes; |
Tilman Schmidt | 2032e2c | 2009-10-25 09:30:07 +0000 | [diff] [blame] | 848 | if (bcs->ignore) { |
| 849 | dev_kfree_skb(bcs->skb); |
| 850 | bcs->skb = NULL; |
| 851 | } |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 852 | |
| 853 | cs->ops->reinitbcshw(bcs); |
| 854 | } |
| 855 | |
| 856 | static void cleanup_cs(struct cardstate *cs) |
| 857 | { |
| 858 | struct cmdbuf_t *cb, *tcb; |
| 859 | int i; |
| 860 | unsigned long flags; |
| 861 | |
| 862 | spin_lock_irqsave(&cs->lock, flags); |
| 863 | |
Tilman Schmidt | 9d4bee2 | 2008-02-06 01:38:28 -0800 | [diff] [blame] | 864 | cs->mode = M_UNKNOWN; |
| 865 | cs->mstate = MS_UNINITIALIZED; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 866 | |
| 867 | clear_at_state(&cs->at_state); |
| 868 | dealloc_at_states(cs); |
| 869 | free_strings(&cs->at_state); |
| 870 | gigaset_at_init(&cs->at_state, NULL, cs, 0); |
| 871 | |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 872 | cs->inbuf->inputstate = INS_command; |
Tilman Schmidt | 9d4bee2 | 2008-02-06 01:38:28 -0800 | [diff] [blame] | 873 | cs->inbuf->head = 0; |
| 874 | cs->inbuf->tail = 0; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 875 | |
| 876 | cb = cs->cmdbuf; |
| 877 | while (cb) { |
| 878 | tcb = cb; |
| 879 | cb = cb->next; |
| 880 | kfree(tcb); |
| 881 | } |
| 882 | cs->cmdbuf = cs->lastcmdbuf = NULL; |
| 883 | cs->curlen = 0; |
| 884 | cs->cmdbytes = 0; |
| 885 | cs->gotfwver = -1; |
| 886 | cs->dle = 0; |
| 887 | cs->cur_at_seq = 0; |
Tilman Schmidt | 9d4bee2 | 2008-02-06 01:38:28 -0800 | [diff] [blame] | 888 | cs->commands_pending = 0; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 889 | cs->cbytes = 0; |
| 890 | |
| 891 | spin_unlock_irqrestore(&cs->lock, flags); |
| 892 | |
| 893 | for (i = 0; i < cs->channels; ++i) { |
| 894 | gigaset_freebcs(cs->bcs + i); |
| 895 | if (!gigaset_initbcs(cs->bcs + i, cs, i)) |
Tilman Schmidt | c8770dc | 2008-12-26 01:21:29 -0800 | [diff] [blame] | 896 | pr_err("could not allocate channel %d data\n", i); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 897 | } |
| 898 | |
| 899 | if (cs->waiting) { |
| 900 | cs->cmd_result = -ENODEV; |
| 901 | cs->waiting = 0; |
| 902 | wake_up_interruptible(&cs->waitqueue); |
| 903 | } |
| 904 | } |
| 905 | |
| 906 | |
Tilman Schmidt | 1cec972 | 2009-10-06 12:19:01 +0000 | [diff] [blame] | 907 | /** |
| 908 | * gigaset_start() - start device operations |
| 909 | * @cs: device descriptor structure. |
| 910 | * |
| 911 | * Prepares the device for use by setting up communication parameters, |
| 912 | * scheduling an EV_START event to initiate device initialization, and |
| 913 | * waiting for completion of the initialization. |
| 914 | * |
| 915 | * Return value: |
| 916 | * 1 - success, 0 - error |
| 917 | */ |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 918 | int gigaset_start(struct cardstate *cs) |
| 919 | { |
Tilman Schmidt | 69049cc | 2006-04-10 22:55:16 -0700 | [diff] [blame] | 920 | unsigned long flags; |
| 921 | |
Tilman Schmidt | abfd1dc | 2006-04-10 22:55:12 -0700 | [diff] [blame] | 922 | if (mutex_lock_interruptible(&cs->mutex)) |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 923 | return 0; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 924 | |
Tilman Schmidt | 69049cc | 2006-04-10 22:55:16 -0700 | [diff] [blame] | 925 | spin_lock_irqsave(&cs->lock, flags); |
| 926 | cs->connected = 1; |
| 927 | spin_unlock_irqrestore(&cs->lock, flags); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 928 | |
Tilman Schmidt | 9d4bee2 | 2008-02-06 01:38:28 -0800 | [diff] [blame] | 929 | if (cs->mstate != MS_LOCKED) { |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 930 | cs->ops->set_modem_ctrl(cs, 0, TIOCM_DTR|TIOCM_RTS); |
| 931 | cs->ops->baud_rate(cs, B115200); |
| 932 | cs->ops->set_line_ctrl(cs, CS8); |
| 933 | cs->control_state = TIOCM_DTR|TIOCM_RTS; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 934 | } |
| 935 | |
| 936 | cs->waiting = 1; |
| 937 | |
| 938 | if (!gigaset_add_event(cs, &cs->at_state, EV_START, NULL, 0, NULL)) { |
| 939 | cs->waiting = 0; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 940 | goto error; |
| 941 | } |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 942 | gigaset_schedule_event(cs); |
| 943 | |
| 944 | wait_event(cs->waitqueue, !cs->waiting); |
| 945 | |
Tilman Schmidt | abfd1dc | 2006-04-10 22:55:12 -0700 | [diff] [blame] | 946 | mutex_unlock(&cs->mutex); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 947 | return 1; |
| 948 | |
| 949 | error: |
Tilman Schmidt | abfd1dc | 2006-04-10 22:55:12 -0700 | [diff] [blame] | 950 | mutex_unlock(&cs->mutex); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 951 | return 0; |
| 952 | } |
| 953 | EXPORT_SYMBOL_GPL(gigaset_start); |
| 954 | |
Tilman Schmidt | 1cec972 | 2009-10-06 12:19:01 +0000 | [diff] [blame] | 955 | /** |
| 956 | * gigaset_shutdown() - shut down device operations |
| 957 | * @cs: device descriptor structure. |
| 958 | * |
| 959 | * Deactivates the device by scheduling an EV_SHUTDOWN event and |
| 960 | * waiting for completion of the shutdown. |
| 961 | * |
| 962 | * Return value: |
| 963 | * 0 - success, -1 - error (no device associated) |
Tilman Schmidt | e468c04 | 2008-02-06 01:38:29 -0800 | [diff] [blame] | 964 | */ |
| 965 | int gigaset_shutdown(struct cardstate *cs) |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 966 | { |
Tilman Schmidt | abfd1dc | 2006-04-10 22:55:12 -0700 | [diff] [blame] | 967 | mutex_lock(&cs->mutex); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 968 | |
Tilman Schmidt | 5d49c101 | 2008-03-07 19:47:08 +0100 | [diff] [blame] | 969 | if (!(cs->flags & VALID_MINOR)) { |
| 970 | mutex_unlock(&cs->mutex); |
Tilman Schmidt | e468c04 | 2008-02-06 01:38:29 -0800 | [diff] [blame] | 971 | return -1; |
Tilman Schmidt | 5d49c101 | 2008-03-07 19:47:08 +0100 | [diff] [blame] | 972 | } |
Tilman Schmidt | e468c04 | 2008-02-06 01:38:29 -0800 | [diff] [blame] | 973 | |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 974 | cs->waiting = 1; |
| 975 | |
Tilman Schmidt | 1528b18 | 2010-02-22 13:09:52 +0000 | [diff] [blame] | 976 | if (!gigaset_add_event(cs, &cs->at_state, EV_SHUTDOWN, NULL, 0, NULL)) |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 977 | goto exit; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 978 | gigaset_schedule_event(cs); |
| 979 | |
Tilman Schmidt | 2869b23 | 2007-02-12 00:52:34 -0800 | [diff] [blame] | 980 | wait_event(cs->waitqueue, !cs->waiting); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 981 | |
| 982 | cleanup_cs(cs); |
| 983 | |
| 984 | exit: |
Tilman Schmidt | abfd1dc | 2006-04-10 22:55:12 -0700 | [diff] [blame] | 985 | mutex_unlock(&cs->mutex); |
Tilman Schmidt | e468c04 | 2008-02-06 01:38:29 -0800 | [diff] [blame] | 986 | return 0; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 987 | } |
| 988 | EXPORT_SYMBOL_GPL(gigaset_shutdown); |
| 989 | |
Tilman Schmidt | 1cec972 | 2009-10-06 12:19:01 +0000 | [diff] [blame] | 990 | /** |
| 991 | * gigaset_stop() - stop device operations |
| 992 | * @cs: device descriptor structure. |
| 993 | * |
| 994 | * Stops operations on the device by scheduling an EV_STOP event and |
| 995 | * waiting for completion of the shutdown. |
| 996 | */ |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 997 | void gigaset_stop(struct cardstate *cs) |
| 998 | { |
Tilman Schmidt | abfd1dc | 2006-04-10 22:55:12 -0700 | [diff] [blame] | 999 | mutex_lock(&cs->mutex); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1000 | |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1001 | cs->waiting = 1; |
| 1002 | |
Tilman Schmidt | 1528b18 | 2010-02-22 13:09:52 +0000 | [diff] [blame] | 1003 | if (!gigaset_add_event(cs, &cs->at_state, EV_STOP, NULL, 0, NULL)) |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1004 | goto exit; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1005 | gigaset_schedule_event(cs); |
| 1006 | |
Tilman Schmidt | 2869b23 | 2007-02-12 00:52:34 -0800 | [diff] [blame] | 1007 | wait_event(cs->waitqueue, !cs->waiting); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1008 | |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1009 | cleanup_cs(cs); |
| 1010 | |
| 1011 | exit: |
Tilman Schmidt | abfd1dc | 2006-04-10 22:55:12 -0700 | [diff] [blame] | 1012 | mutex_unlock(&cs->mutex); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1013 | } |
| 1014 | EXPORT_SYMBOL_GPL(gigaset_stop); |
| 1015 | |
| 1016 | static LIST_HEAD(drivers); |
Ingo Molnar | 34af946 | 2006-06-27 02:53:55 -0700 | [diff] [blame] | 1017 | static DEFINE_SPINLOCK(driver_lock); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1018 | |
| 1019 | struct cardstate *gigaset_get_cs_by_id(int id) |
| 1020 | { |
| 1021 | unsigned long flags; |
Tilman Schmidt | 35dc845 | 2007-03-29 01:20:34 -0700 | [diff] [blame] | 1022 | struct cardstate *ret = NULL; |
| 1023 | struct cardstate *cs; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1024 | struct gigaset_driver *drv; |
| 1025 | unsigned i; |
| 1026 | |
| 1027 | spin_lock_irqsave(&driver_lock, flags); |
| 1028 | list_for_each_entry(drv, &drivers, list) { |
| 1029 | spin_lock(&drv->lock); |
| 1030 | for (i = 0; i < drv->minors; ++i) { |
Tilman Schmidt | e468c04 | 2008-02-06 01:38:29 -0800 | [diff] [blame] | 1031 | cs = drv->cs + i; |
| 1032 | if ((cs->flags & VALID_ID) && cs->myid == id) { |
| 1033 | ret = cs; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1034 | break; |
Tilman Schmidt | e468c04 | 2008-02-06 01:38:29 -0800 | [diff] [blame] | 1035 | } |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1036 | } |
| 1037 | spin_unlock(&drv->lock); |
| 1038 | if (ret) |
| 1039 | break; |
| 1040 | } |
| 1041 | spin_unlock_irqrestore(&driver_lock, flags); |
| 1042 | return ret; |
| 1043 | } |
| 1044 | |
| 1045 | void gigaset_debugdrivers(void) |
| 1046 | { |
| 1047 | unsigned long flags; |
| 1048 | static struct cardstate *cs; |
| 1049 | struct gigaset_driver *drv; |
| 1050 | unsigned i; |
| 1051 | |
| 1052 | spin_lock_irqsave(&driver_lock, flags); |
| 1053 | list_for_each_entry(drv, &drivers, list) { |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 1054 | gig_dbg(DEBUG_DRIVER, "driver %p", drv); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1055 | spin_lock(&drv->lock); |
| 1056 | for (i = 0; i < drv->minors; ++i) { |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 1057 | gig_dbg(DEBUG_DRIVER, " index %u", i); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1058 | cs = drv->cs + i; |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 1059 | gig_dbg(DEBUG_DRIVER, " cardstate %p", cs); |
Tilman Schmidt | e468c04 | 2008-02-06 01:38:29 -0800 | [diff] [blame] | 1060 | gig_dbg(DEBUG_DRIVER, " flags 0x%02x", cs->flags); |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 1061 | gig_dbg(DEBUG_DRIVER, " minor_index %u", |
| 1062 | cs->minor_index); |
| 1063 | gig_dbg(DEBUG_DRIVER, " driver %p", cs->driver); |
| 1064 | gig_dbg(DEBUG_DRIVER, " i4l id %d", cs->myid); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1065 | } |
| 1066 | spin_unlock(&drv->lock); |
| 1067 | } |
| 1068 | spin_unlock_irqrestore(&driver_lock, flags); |
| 1069 | } |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1070 | |
Adrian Bunk | 8ca445d | 2006-04-10 22:55:18 -0700 | [diff] [blame] | 1071 | static struct cardstate *gigaset_get_cs_by_minor(unsigned minor) |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1072 | { |
| 1073 | unsigned long flags; |
Tilman Schmidt | 35dc845 | 2007-03-29 01:20:34 -0700 | [diff] [blame] | 1074 | struct cardstate *ret = NULL; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1075 | struct gigaset_driver *drv; |
| 1076 | unsigned index; |
| 1077 | |
| 1078 | spin_lock_irqsave(&driver_lock, flags); |
| 1079 | list_for_each_entry(drv, &drivers, list) { |
| 1080 | if (minor < drv->minor || minor >= drv->minor + drv->minors) |
| 1081 | continue; |
| 1082 | index = minor - drv->minor; |
| 1083 | spin_lock(&drv->lock); |
Tilman Schmidt | e468c04 | 2008-02-06 01:38:29 -0800 | [diff] [blame] | 1084 | if (drv->cs[index].flags & VALID_MINOR) |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1085 | ret = drv->cs + index; |
| 1086 | spin_unlock(&drv->lock); |
| 1087 | if (ret) |
| 1088 | break; |
| 1089 | } |
| 1090 | spin_unlock_irqrestore(&driver_lock, flags); |
| 1091 | return ret; |
| 1092 | } |
| 1093 | |
Adrian Bunk | 8ca445d | 2006-04-10 22:55:18 -0700 | [diff] [blame] | 1094 | struct cardstate *gigaset_get_cs_by_tty(struct tty_struct *tty) |
| 1095 | { |
| 1096 | if (tty->index < 0 || tty->index >= tty->driver->num) |
| 1097 | return NULL; |
| 1098 | return gigaset_get_cs_by_minor(tty->index + tty->driver->minor_start); |
| 1099 | } |
| 1100 | |
Tilman Schmidt | 1cec972 | 2009-10-06 12:19:01 +0000 | [diff] [blame] | 1101 | /** |
| 1102 | * gigaset_freedriver() - free all associated ressources of a driver |
| 1103 | * @drv: driver descriptor structure. |
| 1104 | * |
| 1105 | * Unregisters the driver from the system and deallocates the driver |
| 1106 | * structure @drv and all structures referenced from it. |
| 1107 | * All devices should be shut down before calling this. |
| 1108 | */ |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1109 | void gigaset_freedriver(struct gigaset_driver *drv) |
| 1110 | { |
| 1111 | unsigned long flags; |
| 1112 | |
| 1113 | spin_lock_irqsave(&driver_lock, flags); |
| 1114 | list_del(&drv->list); |
| 1115 | spin_unlock_irqrestore(&driver_lock, flags); |
| 1116 | |
| 1117 | gigaset_if_freedriver(drv); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1118 | |
| 1119 | kfree(drv->cs); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1120 | kfree(drv); |
| 1121 | } |
| 1122 | EXPORT_SYMBOL_GPL(gigaset_freedriver); |
| 1123 | |
Tilman Schmidt | 1cec972 | 2009-10-06 12:19:01 +0000 | [diff] [blame] | 1124 | /** |
| 1125 | * gigaset_initdriver() - initialize driver structure |
| 1126 | * @minor: First minor number |
| 1127 | * @minors: Number of minors this driver can handle |
| 1128 | * @procname: Name of the driver |
| 1129 | * @devname: Name of the device files (prefix without minor number) |
| 1130 | * |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1131 | * Allocate and initialize gigaset_driver structure. Initialize interface. |
Tilman Schmidt | 1cec972 | 2009-10-06 12:19:01 +0000 | [diff] [blame] | 1132 | * |
| 1133 | * Return value: |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 1134 | * Pointer to the gigaset_driver structure on success, NULL on failure. |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1135 | */ |
| 1136 | struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors, |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 1137 | const char *procname, |
| 1138 | const char *devname, |
Tilman Schmidt | 784d585 | 2006-04-10 22:55:04 -0700 | [diff] [blame] | 1139 | const struct gigaset_ops *ops, |
| 1140 | struct module *owner) |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1141 | { |
| 1142 | struct gigaset_driver *drv; |
| 1143 | unsigned long flags; |
| 1144 | unsigned i; |
| 1145 | |
| 1146 | drv = kmalloc(sizeof *drv, GFP_KERNEL); |
| 1147 | if (!drv) |
| 1148 | return NULL; |
Adrian Bunk | f4675c7 | 2006-04-10 22:55:19 -0700 | [diff] [blame] | 1149 | |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1150 | drv->have_tty = 0; |
| 1151 | drv->minor = minor; |
| 1152 | drv->minors = minors; |
| 1153 | spin_lock_init(&drv->lock); |
| 1154 | drv->blocked = 0; |
| 1155 | drv->ops = ops; |
| 1156 | drv->owner = owner; |
| 1157 | INIT_LIST_HEAD(&drv->list); |
| 1158 | |
| 1159 | drv->cs = kmalloc(minors * sizeof *drv->cs, GFP_KERNEL); |
| 1160 | if (!drv->cs) |
Tilman Schmidt | e702ff0 | 2007-01-26 00:56:56 -0800 | [diff] [blame] | 1161 | goto error; |
Adrian Bunk | f4675c7 | 2006-04-10 22:55:19 -0700 | [diff] [blame] | 1162 | |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1163 | for (i = 0; i < minors; ++i) { |
Tilman Schmidt | e468c04 | 2008-02-06 01:38:29 -0800 | [diff] [blame] | 1164 | drv->cs[i].flags = 0; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1165 | drv->cs[i].driver = drv; |
| 1166 | drv->cs[i].ops = drv->ops; |
| 1167 | drv->cs[i].minor_index = i; |
Tilman Schmidt | 5d49c101 | 2008-03-07 19:47:08 +0100 | [diff] [blame] | 1168 | mutex_init(&drv->cs[i].mutex); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1169 | } |
| 1170 | |
Greg Kroah-Hartman | f4eaa37 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1171 | gigaset_if_initdriver(drv, procname, devname); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1172 | |
| 1173 | spin_lock_irqsave(&driver_lock, flags); |
| 1174 | list_add(&drv->list, &drivers); |
| 1175 | spin_unlock_irqrestore(&driver_lock, flags); |
| 1176 | |
| 1177 | return drv; |
| 1178 | |
Tilman Schmidt | e702ff0 | 2007-01-26 00:56:56 -0800 | [diff] [blame] | 1179 | error: |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1180 | kfree(drv->cs); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1181 | kfree(drv); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1182 | return NULL; |
| 1183 | } |
| 1184 | EXPORT_SYMBOL_GPL(gigaset_initdriver); |
| 1185 | |
Tilman Schmidt | 1cec972 | 2009-10-06 12:19:01 +0000 | [diff] [blame] | 1186 | /** |
| 1187 | * gigaset_blockdriver() - block driver |
| 1188 | * @drv: driver descriptor structure. |
| 1189 | * |
| 1190 | * Prevents the driver from attaching new devices, in preparation for |
| 1191 | * deregistration. |
| 1192 | */ |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1193 | void gigaset_blockdriver(struct gigaset_driver *drv) |
| 1194 | { |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1195 | drv->blocked = 1; |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1196 | } |
| 1197 | EXPORT_SYMBOL_GPL(gigaset_blockdriver); |
| 1198 | |
| 1199 | static int __init gigaset_init_module(void) |
| 1200 | { |
| 1201 | /* in accordance with the principle of least astonishment, |
| 1202 | * setting the 'debug' parameter to 1 activates a sensible |
| 1203 | * set of default debug levels |
| 1204 | */ |
| 1205 | if (gigaset_debuglevel == 1) |
| 1206 | gigaset_debuglevel = DEBUG_DEFAULT; |
| 1207 | |
Tilman Schmidt | 2038724 | 2009-10-06 12:18:41 +0000 | [diff] [blame] | 1208 | pr_info(DRIVER_DESC DRIVER_DESC_DEBUG "\n"); |
Tilman Schmidt | bc35b4e | 2010-03-14 12:58:05 +0000 | [diff] [blame] | 1209 | gigaset_isdn_regdrv(); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1210 | return 0; |
| 1211 | } |
| 1212 | |
| 1213 | static void __exit gigaset_exit_module(void) |
| 1214 | { |
Tilman Schmidt | bc35b4e | 2010-03-14 12:58:05 +0000 | [diff] [blame] | 1215 | gigaset_isdn_unregdrv(); |
Hansjoerg Lipp | 6fd5ea6 | 2006-03-26 01:38:29 -0800 | [diff] [blame] | 1216 | } |
| 1217 | |
| 1218 | module_init(gigaset_init_module); |
| 1219 | module_exit(gigaset_exit_module); |
| 1220 | |
| 1221 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 1222 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 1223 | |
| 1224 | MODULE_LICENSE("GPL"); |