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Hansjoerg Lippee8a4b72006-03-26 01:38:32 -08001/*
2 * interface to user space for the gigaset driver
3 *
4 * Copyright (c) 2004 by Hansjoerg Lipp <hjlipp@web.de>
5 *
6 * =====================================================================
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
11 * =====================================================================
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -080012 */
13
14#include "gigaset.h"
15#include <linux/gigaset_dev.h>
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -080016#include <linux/tty_flip.h>
Paul Gortmaker07a97fe2011-08-30 12:08:51 -040017#include <linux/module.h>
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -080018
19/*** our ioctls ***/
20
21static int if_lock(struct cardstate *cs, int *arg)
22{
23 int cmd = *arg;
24
Tilman Schmidt784d5852006-04-10 22:55:04 -070025 gig_dbg(DEBUG_IF, "%u: if_lock (%d)", cs->minor_index, cmd);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -080026
27 if (cmd > 1)
28 return -EINVAL;
29
30 if (cmd < 0) {
Tilman Schmidt9d4bee22008-02-06 01:38:28 -080031 *arg = cs->mstate == MS_LOCKED;
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -080032 return 0;
33 }
34
Tilman Schmidt9d4bee22008-02-06 01:38:28 -080035 if (!cmd && cs->mstate == MS_LOCKED && cs->connected) {
Joe Perches475be4d2012-02-19 19:52:38 -080036 cs->ops->set_modem_ctrl(cs, 0, TIOCM_DTR | TIOCM_RTS);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -080037 cs->ops->baud_rate(cs, B115200);
38 cs->ops->set_line_ctrl(cs, CS8);
Joe Perches475be4d2012-02-19 19:52:38 -080039 cs->control_state = TIOCM_DTR | TIOCM_RTS;
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -080040 }
41
42 cs->waiting = 1;
43 if (!gigaset_add_event(cs, &cs->at_state, EV_IF_LOCK,
Tilman Schmidt784d5852006-04-10 22:55:04 -070044 NULL, cmd, NULL)) {
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -080045 cs->waiting = 0;
46 return -ENOMEM;
47 }
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -080048 gigaset_schedule_event(cs);
49
50 wait_event(cs->waitqueue, !cs->waiting);
51
52 if (cs->cmd_result >= 0) {
53 *arg = cs->cmd_result;
54 return 0;
55 }
56
57 return cs->cmd_result;
58}
59
60static int if_version(struct cardstate *cs, unsigned arg[4])
61{
62 static const unsigned version[4] = GIG_VERSION;
63 static const unsigned compat[4] = GIG_COMPAT;
64 unsigned cmd = arg[0];
65
Tilman Schmidt784d5852006-04-10 22:55:04 -070066 gig_dbg(DEBUG_IF, "%u: if_version (%d)", cs->minor_index, cmd);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -080067
68 switch (cmd) {
69 case GIGVER_DRIVER:
70 memcpy(arg, version, sizeof version);
71 return 0;
72 case GIGVER_COMPAT:
73 memcpy(arg, compat, sizeof compat);
74 return 0;
75 case GIGVER_FWBASE:
76 cs->waiting = 1;
77 if (!gigaset_add_event(cs, &cs->at_state, EV_IF_VER,
Tilman Schmidt784d5852006-04-10 22:55:04 -070078 NULL, 0, arg)) {
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -080079 cs->waiting = 0;
80 return -ENOMEM;
81 }
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -080082 gigaset_schedule_event(cs);
83
84 wait_event(cs->waitqueue, !cs->waiting);
85
86 if (cs->cmd_result >= 0)
87 return 0;
88
89 return cs->cmd_result;
90 default:
91 return -EINVAL;
92 }
93}
94
95static int if_config(struct cardstate *cs, int *arg)
96{
Tilman Schmidt784d5852006-04-10 22:55:04 -070097 gig_dbg(DEBUG_IF, "%u: if_config (%d)", cs->minor_index, *arg);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -080098
99 if (*arg != 1)
100 return -EINVAL;
101
Tilman Schmidt9d4bee22008-02-06 01:38:28 -0800102 if (cs->mstate != MS_LOCKED)
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800103 return -EBUSY;
104
Tilman Schmidt69049cc2006-04-10 22:55:16 -0700105 if (!cs->connected) {
Tilman Schmidtc8770dc2008-12-26 01:21:29 -0800106 pr_err("%s: not connected\n", __func__);
Tilman Schmidt69049cc2006-04-10 22:55:16 -0700107 return -ENODEV;
108 }
109
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800110 *arg = 0;
111 return gigaset_enterconfigmode(cs);
112}
113
114/*** the terminal driver ***/
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800115
116static int if_open(struct tty_struct *tty, struct file *filp)
117{
118 struct cardstate *cs;
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800119
Tilman Schmidt784d5852006-04-10 22:55:04 -0700120 gig_dbg(DEBUG_IF, "%d+%d: %s()",
121 tty->driver->minor_start, tty->index, __func__);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800122
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800123 cs = gigaset_get_cs_by_tty(tty);
Tilman Schmidte468c042008-02-06 01:38:29 -0800124 if (!cs || !try_module_get(cs->driver->owner))
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800125 return -ENODEV;
126
Pavel Shved2f9381e2011-06-17 06:25:11 +0000127 if (mutex_lock_interruptible(&cs->mutex)) {
128 module_put(cs->driver->owner);
Tilman Schmidtd9ba9c92009-10-25 09:30:17 +0000129 return -ERESTARTSYS;
Pavel Shved2f9381e2011-06-17 06:25:11 +0000130 }
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800131 tty->driver_data = cs;
132
Jiri Slaby48a74662012-03-05 14:52:55 +0100133 ++cs->port.count;
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800134
Jiri Slaby48a74662012-03-05 14:52:55 +0100135 if (cs->port.count == 1) {
136 tty_port_tty_set(&cs->port, tty);
Jiri Slabyd6c53c02013-01-03 15:53:05 +0100137 cs->port.low_latency = 1;
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800138 }
139
Tilman Schmidtabfd1dc2006-04-10 22:55:12 -0700140 mutex_unlock(&cs->mutex);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800141 return 0;
142}
143
144static void if_close(struct tty_struct *tty, struct file *filp)
145{
Jiri Slabyfc258f82012-03-05 14:52:54 +0100146 struct cardstate *cs = tty->driver_data;
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800147
Jiri Slabyfc258f82012-03-05 14:52:54 +0100148 if (!cs) { /* happens if we didn't find cs in open */
Tilman Schmidtef37ea32012-03-25 19:12:37 +0200149 gig_dbg(DEBUG_IF, "%s: no cardstate", __func__);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800150 return;
151 }
152
Tilman Schmidt784d5852006-04-10 22:55:04 -0700153 gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800154
Tilman Schmidtabfd1dc2006-04-10 22:55:12 -0700155 mutex_lock(&cs->mutex);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800156
Tilman Schmidt51370e52009-04-05 06:39:33 +0000157 if (!cs->connected)
158 gig_dbg(DEBUG_IF, "not connected"); /* nothing to do */
Jiri Slaby48a74662012-03-05 14:52:55 +0100159 else if (!cs->port.count)
Tilman Schmidt50027792008-07-23 21:28:27 -0700160 dev_warn(cs->dev, "%s: device not opened\n", __func__);
Jiri Slaby48a74662012-03-05 14:52:55 +0100161 else if (!--cs->port.count)
162 tty_port_tty_set(&cs->port, NULL);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800163
Tilman Schmidtabfd1dc2006-04-10 22:55:12 -0700164 mutex_unlock(&cs->mutex);
Tilman Schmidte468c042008-02-06 01:38:29 -0800165
166 module_put(cs->driver->owner);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800167}
168
Alan Cox6caa76b2011-02-14 16:27:22 +0000169static int if_ioctl(struct tty_struct *tty,
Tilman Schmidt784d5852006-04-10 22:55:04 -0700170 unsigned int cmd, unsigned long arg)
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800171{
Jiri Slabyfc258f82012-03-05 14:52:54 +0100172 struct cardstate *cs = tty->driver_data;
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800173 int retval = -ENODEV;
174 int int_arg;
175 unsigned char buf[6];
176 unsigned version[4];
177
Tilman Schmidt784d5852006-04-10 22:55:04 -0700178 gig_dbg(DEBUG_IF, "%u: %s(0x%x)", cs->minor_index, __func__, cmd);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800179
Tilman Schmidtabfd1dc2006-04-10 22:55:12 -0700180 if (mutex_lock_interruptible(&cs->mutex))
Tilman Schmidtd9ba9c92009-10-25 09:30:17 +0000181 return -ERESTARTSYS;
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800182
Tilman Schmidt51370e52009-04-05 06:39:33 +0000183 if (!cs->connected) {
184 gig_dbg(DEBUG_IF, "not connected");
185 retval = -ENODEV;
Jiri Slabyfc258f82012-03-05 14:52:54 +0100186 } else {
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800187 retval = 0;
188 switch (cmd) {
189 case GIGASET_REDIR:
190 retval = get_user(int_arg, (int __user *) arg);
191 if (retval >= 0)
192 retval = if_lock(cs, &int_arg);
193 if (retval >= 0)
194 retval = put_user(int_arg, (int __user *) arg);
195 break;
196 case GIGASET_CONFIG:
197 retval = get_user(int_arg, (int __user *) arg);
198 if (retval >= 0)
199 retval = if_config(cs, &int_arg);
200 if (retval >= 0)
201 retval = put_user(int_arg, (int __user *) arg);
202 break;
203 case GIGASET_BRKCHARS:
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800204 retval = copy_from_user(&buf,
Joe Perches475be4d2012-02-19 19:52:38 -0800205 (const unsigned char __user *) arg, 6)
Tilman Schmidt784d5852006-04-10 22:55:04 -0700206 ? -EFAULT : 0;
Tilman Schmidt01371502006-04-10 22:55:11 -0700207 if (retval >= 0) {
208 gigaset_dbg_buffer(DEBUG_IF, "GIGASET_BRKCHARS",
Joe Perches475be4d2012-02-19 19:52:38 -0800209 6, (const unsigned char *) arg);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800210 retval = cs->ops->brkchars(cs, buf);
Tilman Schmidt01371502006-04-10 22:55:11 -0700211 }
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800212 break;
213 case GIGASET_VERSION:
Tilman Schmidt917f5082006-04-10 22:55:00 -0700214 retval = copy_from_user(version,
Joe Perches475be4d2012-02-19 19:52:38 -0800215 (unsigned __user *) arg, sizeof version)
Tilman Schmidt784d5852006-04-10 22:55:04 -0700216 ? -EFAULT : 0;
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800217 if (retval >= 0)
218 retval = if_version(cs, version);
219 if (retval >= 0)
Tilman Schmidt917f5082006-04-10 22:55:00 -0700220 retval = copy_to_user((unsigned __user *) arg,
Tilman Schmidt784d5852006-04-10 22:55:04 -0700221 version, sizeof version)
222 ? -EFAULT : 0;
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800223 break;
Tilman Schmidt784d5852006-04-10 22:55:04 -0700224 default:
Tilman Schmidt1528b182010-02-22 13:09:52 +0000225 gig_dbg(DEBUG_IF, "%s: arg not supported - 0x%04x",
Tilman Schmidt784d5852006-04-10 22:55:04 -0700226 __func__, cmd);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800227 retval = -ENOIOCTLCMD;
228 }
229 }
230
Tilman Schmidtabfd1dc2006-04-10 22:55:12 -0700231 mutex_unlock(&cs->mutex);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800232
233 return retval;
234}
235
Alan Cox60b33c12011-02-14 16:26:14 +0000236static int if_tiocmget(struct tty_struct *tty)
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800237{
Jiri Slabyfc258f82012-03-05 14:52:54 +0100238 struct cardstate *cs = tty->driver_data;
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800239 int retval;
240
Tilman Schmidt784d5852006-04-10 22:55:04 -0700241 gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800242
Tilman Schmidtabfd1dc2006-04-10 22:55:12 -0700243 if (mutex_lock_interruptible(&cs->mutex))
Tilman Schmidtd9ba9c92009-10-25 09:30:17 +0000244 return -ERESTARTSYS;
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800245
Joe Perches475be4d2012-02-19 19:52:38 -0800246 retval = cs->control_state & (TIOCM_RTS | TIOCM_DTR);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800247
Tilman Schmidtabfd1dc2006-04-10 22:55:12 -0700248 mutex_unlock(&cs->mutex);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800249
250 return retval;
251}
252
Alan Cox20b9d172011-02-14 16:26:50 +0000253static int if_tiocmset(struct tty_struct *tty,
Tilman Schmidt784d5852006-04-10 22:55:04 -0700254 unsigned int set, unsigned int clear)
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800255{
Jiri Slabyfc258f82012-03-05 14:52:54 +0100256 struct cardstate *cs = tty->driver_data;
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800257 int retval;
258 unsigned mc;
259
Tilman Schmidt784d5852006-04-10 22:55:04 -0700260 gig_dbg(DEBUG_IF, "%u: %s(0x%x, 0x%x)",
261 cs->minor_index, __func__, set, clear);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800262
Tilman Schmidtabfd1dc2006-04-10 22:55:12 -0700263 if (mutex_lock_interruptible(&cs->mutex))
Tilman Schmidtd9ba9c92009-10-25 09:30:17 +0000264 return -ERESTARTSYS;
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800265
Tilman Schmidt69049cc2006-04-10 22:55:16 -0700266 if (!cs->connected) {
Tilman Schmidt51370e52009-04-05 06:39:33 +0000267 gig_dbg(DEBUG_IF, "not connected");
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800268 retval = -ENODEV;
269 } else {
Joe Perches475be4d2012-02-19 19:52:38 -0800270 mc = (cs->control_state | set) & ~clear & (TIOCM_RTS | TIOCM_DTR);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800271 retval = cs->ops->set_modem_ctrl(cs, cs->control_state, mc);
272 cs->control_state = mc;
273 }
274
Tilman Schmidtabfd1dc2006-04-10 22:55:12 -0700275 mutex_unlock(&cs->mutex);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800276
277 return retval;
278}
279
280static int if_write(struct tty_struct *tty, const unsigned char *buf, int count)
281{
Jiri Slabyfc258f82012-03-05 14:52:54 +0100282 struct cardstate *cs = tty->driver_data;
Tilman Schmidte3628dd2010-07-05 14:18:43 +0000283 struct cmdbuf_t *cb;
284 int retval;
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800285
Tilman Schmidt784d5852006-04-10 22:55:04 -0700286 gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800287
Tilman Schmidtabfd1dc2006-04-10 22:55:12 -0700288 if (mutex_lock_interruptible(&cs->mutex))
Tilman Schmidtd9ba9c92009-10-25 09:30:17 +0000289 return -ERESTARTSYS;
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800290
Tilman Schmidt51370e52009-04-05 06:39:33 +0000291 if (!cs->connected) {
292 gig_dbg(DEBUG_IF, "not connected");
293 retval = -ENODEV;
Tilman Schmidte3628dd2010-07-05 14:18:43 +0000294 goto done;
295 }
Tilman Schmidte3628dd2010-07-05 14:18:43 +0000296 if (cs->mstate != MS_LOCKED) {
Tilman Schmidt50027792008-07-23 21:28:27 -0700297 dev_warn(cs->dev, "can't write to unlocked device\n");
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800298 retval = -EBUSY;
Tilman Schmidte3628dd2010-07-05 14:18:43 +0000299 goto done;
300 }
301 if (count <= 0) {
302 /* nothing to do */
303 retval = 0;
304 goto done;
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800305 }
306
Tilman Schmidte3628dd2010-07-05 14:18:43 +0000307 cb = kmalloc(sizeof(struct cmdbuf_t) + count, GFP_KERNEL);
308 if (!cb) {
309 dev_err(cs->dev, "%s: out of memory\n", __func__);
310 retval = -ENOMEM;
311 goto done;
312 }
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800313
Tilman Schmidte3628dd2010-07-05 14:18:43 +0000314 memcpy(cb->buf, buf, count);
315 cb->len = count;
316 cb->offset = 0;
317 cb->next = NULL;
318 cb->wake_tasklet = &cs->if_wake_tasklet;
319 retval = cs->ops->write_cmd(cs, cb);
320done:
321 mutex_unlock(&cs->mutex);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800322 return retval;
323}
324
325static int if_write_room(struct tty_struct *tty)
326{
Jiri Slabyfc258f82012-03-05 14:52:54 +0100327 struct cardstate *cs = tty->driver_data;
Tilman Schmidtcdc48272013-01-21 11:57:20 +0000328 int retval;
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800329
Tilman Schmidt784d5852006-04-10 22:55:04 -0700330 gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800331
Tilman Schmidtabfd1dc2006-04-10 22:55:12 -0700332 if (mutex_lock_interruptible(&cs->mutex))
Tilman Schmidtd9ba9c92009-10-25 09:30:17 +0000333 return -ERESTARTSYS;
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800334
Tilman Schmidt51370e52009-04-05 06:39:33 +0000335 if (!cs->connected) {
336 gig_dbg(DEBUG_IF, "not connected");
337 retval = -ENODEV;
Jiri Slabyfc258f82012-03-05 14:52:54 +0100338 } else if (cs->mstate != MS_LOCKED) {
Tilman Schmidt50027792008-07-23 21:28:27 -0700339 dev_warn(cs->dev, "can't write to unlocked device\n");
Tilman Schmidt9d4bee22008-02-06 01:38:28 -0800340 retval = -EBUSY;
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800341 } else
342 retval = cs->ops->write_room(cs);
343
Tilman Schmidtabfd1dc2006-04-10 22:55:12 -0700344 mutex_unlock(&cs->mutex);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800345
346 return retval;
347}
348
349static int if_chars_in_buffer(struct tty_struct *tty)
350{
Jiri Slabyfc258f82012-03-05 14:52:54 +0100351 struct cardstate *cs = tty->driver_data;
Tilman Schmidta4304f22009-08-06 20:33:33 -0700352 int retval = 0;
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800353
Tilman Schmidt784d5852006-04-10 22:55:04 -0700354 gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800355
Tilman Schmidta4304f22009-08-06 20:33:33 -0700356 mutex_lock(&cs->mutex);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800357
Tilman Schmidta4304f22009-08-06 20:33:33 -0700358 if (!cs->connected)
Tilman Schmidt51370e52009-04-05 06:39:33 +0000359 gig_dbg(DEBUG_IF, "not connected");
Tilman Schmidta4304f22009-08-06 20:33:33 -0700360 else if (cs->mstate != MS_LOCKED)
Tilman Schmidt50027792008-07-23 21:28:27 -0700361 dev_warn(cs->dev, "can't write to unlocked device\n");
Tilman Schmidta4304f22009-08-06 20:33:33 -0700362 else
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800363 retval = cs->ops->chars_in_buffer(cs);
364
Tilman Schmidtabfd1dc2006-04-10 22:55:12 -0700365 mutex_unlock(&cs->mutex);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800366
367 return retval;
368}
369
370static void if_throttle(struct tty_struct *tty)
371{
Jiri Slabyfc258f82012-03-05 14:52:54 +0100372 struct cardstate *cs = tty->driver_data;
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800373
Tilman Schmidt784d5852006-04-10 22:55:04 -0700374 gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800375
Tilman Schmidtabfd1dc2006-04-10 22:55:12 -0700376 mutex_lock(&cs->mutex);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800377
Tilman Schmidt51370e52009-04-05 06:39:33 +0000378 if (!cs->connected)
379 gig_dbg(DEBUG_IF, "not connected"); /* nothing to do */
Tilman Schmidtd9ba9c92009-10-25 09:30:17 +0000380 else
Tilman Schmidt1528b182010-02-22 13:09:52 +0000381 gig_dbg(DEBUG_IF, "%s: not implemented\n", __func__);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800382
Tilman Schmidtabfd1dc2006-04-10 22:55:12 -0700383 mutex_unlock(&cs->mutex);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800384}
385
386static void if_unthrottle(struct tty_struct *tty)
387{
Jiri Slabyfc258f82012-03-05 14:52:54 +0100388 struct cardstate *cs = tty->driver_data;
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800389
Tilman Schmidt784d5852006-04-10 22:55:04 -0700390 gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800391
Tilman Schmidtabfd1dc2006-04-10 22:55:12 -0700392 mutex_lock(&cs->mutex);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800393
Tilman Schmidt51370e52009-04-05 06:39:33 +0000394 if (!cs->connected)
395 gig_dbg(DEBUG_IF, "not connected"); /* nothing to do */
Tilman Schmidtd9ba9c92009-10-25 09:30:17 +0000396 else
Tilman Schmidt1528b182010-02-22 13:09:52 +0000397 gig_dbg(DEBUG_IF, "%s: not implemented\n", __func__);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800398
Tilman Schmidtabfd1dc2006-04-10 22:55:12 -0700399 mutex_unlock(&cs->mutex);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800400}
401
Alan Cox606d0992006-12-08 02:38:45 -0800402static void if_set_termios(struct tty_struct *tty, struct ktermios *old)
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800403{
Jiri Slabyfc258f82012-03-05 14:52:54 +0100404 struct cardstate *cs = tty->driver_data;
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800405 unsigned int iflag;
406 unsigned int cflag;
407 unsigned int old_cflag;
408 unsigned int control_state, new_state;
409
Tilman Schmidt784d5852006-04-10 22:55:04 -0700410 gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800411
Tilman Schmidtabfd1dc2006-04-10 22:55:12 -0700412 mutex_lock(&cs->mutex);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800413
Tilman Schmidt51370e52009-04-05 06:39:33 +0000414 if (!cs->connected) {
415 gig_dbg(DEBUG_IF, "not connected");
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800416 goto out;
417 }
418
Alan Coxadc8d742012-07-14 15:31:47 +0100419 iflag = tty->termios.c_iflag;
420 cflag = tty->termios.c_cflag;
Tilman Schmidtd9ba9c92009-10-25 09:30:17 +0000421 old_cflag = old ? old->c_cflag : cflag;
Tilman Schmidt784d5852006-04-10 22:55:04 -0700422 gig_dbg(DEBUG_IF, "%u: iflag %x cflag %x old %x",
423 cs->minor_index, iflag, cflag, old_cflag);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800424
425 /* get a local copy of the current port settings */
426 control_state = cs->control_state;
427
428 /*
429 * Update baud rate.
430 * Do not attempt to cache old rates and skip settings,
431 * disconnects screw such tricks up completely.
432 * Premature optimization is the root of all evil.
433 */
434
Tilman Schmidt784d5852006-04-10 22:55:04 -0700435 /* reassert DTR and (maybe) RTS on transition from B0 */
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800436 if ((old_cflag & CBAUD) == B0) {
437 new_state = control_state | TIOCM_DTR;
438 /* don't set RTS if using hardware flow control */
439 if (!(old_cflag & CRTSCTS))
440 new_state |= TIOCM_RTS;
Tilman Schmidt784d5852006-04-10 22:55:04 -0700441 gig_dbg(DEBUG_IF, "%u: from B0 - set DTR%s",
442 cs->minor_index,
443 (new_state & TIOCM_RTS) ? " only" : "/RTS");
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800444 cs->ops->set_modem_ctrl(cs, control_state, new_state);
445 control_state = new_state;
446 }
447
448 cs->ops->baud_rate(cs, cflag & CBAUD);
449
450 if ((cflag & CBAUD) == B0) {
451 /* Drop RTS and DTR */
Tilman Schmidt784d5852006-04-10 22:55:04 -0700452 gig_dbg(DEBUG_IF, "%u: to B0 - drop DTR/RTS", cs->minor_index);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800453 new_state = control_state & ~(TIOCM_DTR | TIOCM_RTS);
454 cs->ops->set_modem_ctrl(cs, control_state, new_state);
455 control_state = new_state;
456 }
457
458 /*
459 * Update line control register (LCR)
460 */
461
462 cs->ops->set_line_ctrl(cs, cflag);
463
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800464 /* save off the modified port settings */
465 cs->control_state = control_state;
466
467out:
Tilman Schmidtabfd1dc2006-04-10 22:55:12 -0700468 mutex_unlock(&cs->mutex);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800469}
470
Tilman Schmidtcdc48272013-01-21 11:57:20 +0000471static const struct tty_operations if_ops = {
472 .open = if_open,
473 .close = if_close,
474 .ioctl = if_ioctl,
475 .write = if_write,
476 .write_room = if_write_room,
477 .chars_in_buffer = if_chars_in_buffer,
478 .set_termios = if_set_termios,
479 .throttle = if_throttle,
480 .unthrottle = if_unthrottle,
481 .tiocmget = if_tiocmget,
482 .tiocmset = if_tiocmset,
483};
484
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800485
486/* wakeup tasklet for the write operation */
487static void if_wake(unsigned long data)
488{
Jiri Slaby48a74662012-03-05 14:52:55 +0100489 struct cardstate *cs = (struct cardstate *)data;
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800490
Jiri Slaby6aad04f2013-03-07 13:12:29 +0100491 tty_port_tty_wakeup(&cs->port);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800492}
493
494/*** interface to common ***/
495
496void gigaset_if_init(struct cardstate *cs)
497{
498 struct gigaset_driver *drv;
499
500 drv = cs->driver;
501 if (!drv->have_tty)
502 return;
503
Joe Perches5452fee2009-11-19 09:55:53 +0000504 tasklet_init(&cs->if_wake_tasklet, if_wake, (unsigned long) cs);
Tilman Schmidt7435f502007-02-12 00:52:24 -0800505
506 mutex_lock(&cs->mutex);
Jiri Slaby734cc172012-08-07 21:47:47 +0200507 cs->tty_dev = tty_port_register_device(&cs->port, drv->tty,
508 cs->minor_index, NULL);
Hansjoerg Lipp3dda4e32006-04-22 18:43:00 +0200509
Greg Kroah-Hartman01107d32006-08-07 22:19:37 -0700510 if (!IS_ERR(cs->tty_dev))
511 dev_set_drvdata(cs->tty_dev, cs);
Hansjoerg Lipp3dda4e32006-04-22 18:43:00 +0200512 else {
Tilman Schmidt42e3d612009-05-13 12:44:17 +0000513 pr_warning("could not register device to the tty subsystem\n");
Greg Kroah-Hartman01107d32006-08-07 22:19:37 -0700514 cs->tty_dev = NULL;
Hansjoerg Lipp3dda4e32006-04-22 18:43:00 +0200515 }
Tilman Schmidt7435f502007-02-12 00:52:24 -0800516 mutex_unlock(&cs->mutex);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800517}
518
519void gigaset_if_free(struct cardstate *cs)
520{
521 struct gigaset_driver *drv;
522
523 drv = cs->driver;
524 if (!drv->have_tty)
525 return;
526
527 tasklet_disable(&cs->if_wake_tasklet);
528 tasklet_kill(&cs->if_wake_tasklet);
Greg Kroah-Hartman01107d32006-08-07 22:19:37 -0700529 cs->tty_dev = NULL;
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800530 tty_unregister_device(drv->tty, cs->minor_index);
531}
532
Tilman Schmidt1cec9722009-10-06 12:19:01 +0000533/**
534 * gigaset_if_receive() - pass a received block of data to the tty device
535 * @cs: device descriptor structure.
536 * @buffer: received data.
537 * @len: number of bytes received.
538 *
539 * Called by asyncdata/isocdata if a block of data received from the
540 * device must be sent to userspace through the ttyG* device.
541 */
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800542void gigaset_if_receive(struct cardstate *cs,
Tilman Schmidt784d5852006-04-10 22:55:04 -0700543 unsigned char *buffer, size_t len)
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800544{
Jiri Slaby05c7cd32013-01-03 15:53:04 +0100545 tty_insert_flip_string(&cs->port, buffer, len);
Jiri Slaby2e124b42013-01-03 15:53:06 +0100546 tty_flip_buffer_push(&cs->port);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800547}
548EXPORT_SYMBOL_GPL(gigaset_if_receive);
549
550/* gigaset_if_initdriver
551 * Initialize tty interface.
552 * parameters:
Tilman Schmidt784d5852006-04-10 22:55:04 -0700553 * drv Driver
554 * procname Name of the driver (e.g. for /proc/tty/drivers)
555 * devname Name of the device files (prefix without minor number)
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800556 */
557void gigaset_if_initdriver(struct gigaset_driver *drv, const char *procname,
Greg Kroah-Hartmanf4eaa372005-06-20 21:15:16 -0700558 const char *devname)
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800559{
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800560 int ret;
561 struct tty_driver *tty;
562
563 drv->have_tty = 0;
564
Jiri Slaby2f166692012-03-05 14:51:52 +0100565 drv->tty = tty = alloc_tty_driver(drv->minors);
Tilman Schmidtd9ba9c92009-10-25 09:30:17 +0000566 if (tty == NULL)
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800567 goto enomem;
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800568
Joe Perches5bd49732012-02-27 14:12:07 -0500569 tty->type = TTY_DRIVER_TYPE_SERIAL;
570 tty->subtype = SERIAL_TYPE_NORMAL;
Greg Kroah-Hartman331b8312005-06-20 21:15:16 -0700571 tty->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800572
573 tty->driver_name = procname;
574 tty->name = devname;
575 tty->minor_start = drv->minor;
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800576
Tilman Schmidtd9ba9c92009-10-25 09:30:17 +0000577 tty->init_termios = tty_std_termios;
578 tty->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800579 tty_set_operations(tty, &if_ops);
580
581 ret = tty_register_driver(tty);
582 if (ret < 0) {
Tilman Schmidtc8770dc2008-12-26 01:21:29 -0800583 pr_err("error %d registering tty driver\n", ret);
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800584 goto error;
585 }
Tilman Schmidt784d5852006-04-10 22:55:04 -0700586 gig_dbg(DEBUG_IF, "tty driver initialized");
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800587 drv->have_tty = 1;
588 return;
589
590enomem:
Tilman Schmidtc8770dc2008-12-26 01:21:29 -0800591 pr_err("out of memory\n");
Hansjoerg Lippee8a4b72006-03-26 01:38:32 -0800592error:
593 if (drv->tty)
594 put_tty_driver(drv->tty);
595}
596
597void gigaset_if_freedriver(struct gigaset_driver *drv)
598{
599 if (!drv->have_tty)
600 return;
601
602 drv->have_tty = 0;
603 tty_unregister_driver(drv->tty);
604 put_tty_driver(drv->tty);
605}