3 * keyboard input driver for i2c IR remote controls
5 * Copyright (c) 2000-2003 Gerd Knorr <kraxel@bytesex.org>
6 * modified for PixelView (BT878P+W/FM) by
7 * Michal Kochanowicz <mkochano@pld.org.pl>
8 * Christoph Bartelmus <lirc@bartelmus.de>
9 * modified for KNC ONE TV Station/Anubis Typhoon TView Tuner by
10 * Ulrich Mueller <ulrich.mueller42@web.de>
11 * modified for em2820 based USB TV tuners by
12 * Markus Rechberger <mrechberger@gmail.com>
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
30 #include <linux/module.h>
31 #include <linux/moduleparam.h>
32 #include <linux/init.h>
33 #include <linux/kernel.h>
34 #include <linux/sched.h>
35 #include <linux/string.h>
36 #include <linux/timer.h>
37 #include <linux/delay.h>
38 #include <linux/errno.h>
39 #include <linux/slab.h>
40 #include <linux/i2c.h>
41 #include <linux/workqueue.h>
42 #include <asm/semaphore.h>
43 #include <media/ir-common.h>
44 #include <media/ir-kbd-i2c.h>
46 /* Mark Phalan <phalanm@o2.ie> */
47 static IR_KEYTAB_TYPE ir_codes_pv951[IR_KEYTAB_SIZE] = {
61 [ 31 ] = KEY_VOLUMEDOWN,
62 [ 27 ] = KEY_VOLUMEUP,
63 [ 26 ] = KEY_CHANNELUP,
64 [ 30 ] = KEY_CHANNELDOWN,
66 [ 29 ] = KEY_PAGEDOWN,
69 [ 24 ] = KEY_KPPLUSMINUS, /* CH +/- */
70 [ 22 ] = KEY_SUBTITLE, /* CC */
71 [ 13 ] = KEY_TEXT, /* TTX */
72 [ 11 ] = KEY_TV, /* AIR/CBL */
73 [ 17 ] = KEY_PC, /* PC/TV */
74 [ 23 ] = KEY_OK, /* CH RTN */
75 [ 25 ] = KEY_MODE, /* FUNC */
76 [ 12 ] = KEY_SEARCH, /* AUTOSCAN */
78 /* Not sure what to do with these ones! */
79 [ 15 ] = KEY_SELECT, /* SOURCE */
80 [ 10 ] = KEY_KPPLUS, /* +100 */
81 [ 20 ] = KEY_KPEQUAL, /* SYNC */
82 [ 28 ] = KEY_MEDIA, /* PC/TV */
85 /* ----------------------------------------------------------------------- */
86 /* insmod parameters */
89 module_param(debug, int, 0644); /* debug level (0,1,2) */
91 #define DEVNAME "ir-kbd-i2c"
92 #define dprintk(level, fmt, arg...) if (debug >= level) \
93 printk(KERN_DEBUG DEVNAME ": " fmt , ## arg)
95 /* ----------------------------------------------------------------------- */
97 static int get_key_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
100 int start, toggle, dev, code;
103 if (3 != i2c_master_recv(&ir->c,buf,3))
106 /* split rc5 data block ... */
107 start = (buf[0] >> 6) & 3;
108 toggle = (buf[0] >> 5) & 1;
110 code = (buf[1] >> 2) & 0x3f;
115 dprintk(1,"ir hauppauge (rc5): s%d t%d dev=%d code=%d\n",
116 start, toggle, dev, code);
120 *ir_raw = (start << 12) | (toggle << 11) | (dev << 6) | code;
124 static int get_key_pixelview(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
129 if (1 != i2c_master_recv(&ir->c,&b,1)) {
130 dprintk(1,"read error\n");
138 static int get_key_pv951(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
143 if (1 != i2c_master_recv(&ir->c,&b,1)) {
144 dprintk(1,"read error\n");
151 dprintk(2,"key %02x\n", b);
158 static int get_key_knc1(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
163 if (1 != i2c_master_recv(&ir->c,&b,1)) {
164 dprintk(1,"read error\n");
168 /* it seems that 0xFE indicates that a button is still hold
169 down, while 0xff indicates that no button is hold
170 down. 0xfe sequences are sometimes interrupted by 0xFF */
172 dprintk(2,"key %02x\n", b);
186 /* ----------------------------------------------------------------------- */
188 static void ir_key_poll(struct IR_i2c *ir)
190 static u32 ir_key, ir_raw;
193 dprintk(2,"ir_poll_key\n");
194 rc = ir->get_key(ir, &ir_key, &ir_raw);
196 dprintk(2,"error\n");
201 ir_input_nokey(ir->input, &ir->ir);
203 ir_input_keydown(ir->input, &ir->ir, ir_key, ir_raw);
207 static void ir_timer(unsigned long data)
209 struct IR_i2c *ir = (struct IR_i2c*)data;
210 schedule_work(&ir->work);
213 static void ir_work(void *data)
215 struct IR_i2c *ir = data;
217 mod_timer(&ir->timer, jiffies+HZ/10);
220 /* ----------------------------------------------------------------------- */
222 static int ir_attach(struct i2c_adapter *adap, int addr,
223 unsigned short flags, int kind);
224 static int ir_detach(struct i2c_client *client);
225 static int ir_probe(struct i2c_adapter *adap);
227 static struct i2c_driver driver = {
228 .name = "ir remote kbd driver",
229 .id = I2C_DRIVERID_EXP3, /* FIXME */
230 .flags = I2C_DF_NOTIFY,
231 .attach_adapter = ir_probe,
232 .detach_client = ir_detach,
235 static struct i2c_client client_template =
241 static int ir_attach(struct i2c_adapter *adap, int addr,
242 unsigned short flags, int kind)
244 IR_KEYTAB_TYPE *ir_codes = NULL;
248 struct input_dev *input_dev;
250 ir = kzalloc(sizeof(struct IR_i2c), GFP_KERNEL);
251 input_dev = input_allocate_device();
252 if (!ir || !input_dev) {
254 input_free_device(input_dev);
258 ir->c = client_template;
259 ir->input = input_dev;
261 i2c_set_clientdata(&ir->c, ir);
262 ir->c.adapter = adap;
268 ir->get_key = get_key_pixelview;
269 ir_type = IR_TYPE_OTHER;
270 ir_codes = ir_codes_empty;
274 ir->get_key = get_key_pv951;
275 ir_type = IR_TYPE_OTHER;
276 ir_codes = ir_codes_pv951;
281 ir->get_key = get_key_haup;
282 ir_type = IR_TYPE_RC5;
283 ir_codes = ir_codes_rc5_tv;
287 ir->get_key = get_key_knc1;
288 ir_type = IR_TYPE_OTHER;
289 ir_codes = ir_codes_empty;
293 /* Handled by saa7134-input */
294 name = "SAA713x remote";
295 ir_type = IR_TYPE_OTHER;
298 /* shouldn't happen */
299 printk(DEVNAME ": Huh? unknown i2c address (0x%02x)?\n",addr);
305 snprintf(ir->c.name, sizeof(ir->c.name), "i2c IR (%s)", name);
306 ir->ir_codes=ir_codes;
308 /* register i2c device
309 * At device register, IR codes may be changed to be
312 i2c_attach_client(&ir->c);
314 /* If IR not supported or disabled, unregisters driver */
315 if (ir->get_key == NULL) {
316 i2c_detach_client(&ir->c);
321 /* Phys addr can only be set after attaching (for ir->c.dev.bus_id) */
322 snprintf(ir->phys, sizeof(ir->phys), "%s/%s/ir0",
323 ir->c.adapter->dev.bus_id,
326 /* init + register input device */
327 ir_input_init(input_dev, &ir->ir, ir_type, ir_codes);
328 input_dev->id.bustype = BUS_I2C;
329 input_dev->name = ir->c.name;
330 input_dev->phys = ir->phys;
332 /* register event device */
333 input_register_device(ir->input);
335 /* start polling via eventd */
336 INIT_WORK(&ir->work, ir_work, ir);
337 init_timer(&ir->timer);
338 ir->timer.function = ir_timer;
339 ir->timer.data = (unsigned long)ir;
340 schedule_work(&ir->work);
345 static int ir_detach(struct i2c_client *client)
347 struct IR_i2c *ir = i2c_get_clientdata(client);
349 /* kill outstanding polls */
350 del_timer(&ir->timer);
351 flush_scheduled_work();
353 /* unregister devices */
354 input_unregister_device(ir->input);
355 i2c_detach_client(&ir->c);
362 static int ir_probe(struct i2c_adapter *adap)
365 /* The external IR receiver is at i2c address 0x34 (0x35 for
366 reads). Future Hauppauge cards will have an internal
367 receiver at 0x30 (0x31 for reads). In theory, both can be
368 fitted, and Hauppauge suggest an external overrides an
371 That's why we probe 0x1a (~0x34) first. CB
374 static const int probe_bttv[] = { 0x1a, 0x18, 0x4b, 0x64, 0x30, -1};
375 static const int probe_saa7134[] = { 0x7a, 0x47, -1 };
376 static const int probe_em28XX[] = { 0x30, 0x47, -1 };
377 const int *probe = NULL;
387 probe = probe_saa7134;
389 case I2C_HW_B_EM28XX:
390 probe = probe_em28XX;
396 memset(&c,0,sizeof(c));
398 for (i = 0; -1 != probe[i]; i++) {
400 rc = i2c_master_recv(&c,&buf,0);
401 dprintk(1,"probe 0x%02x @ %s: %s\n",
402 probe[i], adap->name,
403 (0 == rc) ? "yes" : "no");
405 ir_attach(adap,probe[i],0,0);
412 /* ----------------------------------------------------------------------- */
414 MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, Ulrich Mueller");
415 MODULE_DESCRIPTION("input driver for i2c IR remote controls");
416 MODULE_LICENSE("GPL");
418 static int __init ir_init(void)
420 return i2c_add_driver(&driver);
423 static void __exit ir_fini(void)
425 i2c_del_driver(&driver);
428 module_init(ir_init);
429 module_exit(ir_fini);
432 * Overrides for Emacs so that we follow Linus's tabbing style.
433 * ---------------------------------------------------------------------------