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>
13 * modified for DViCO Fusion HDTV 5 RT GOLD by
14 * Chaogui Zhang <czhang1974@gmail.com>
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
32 #include <linux/module.h>
33 #include <linux/init.h>
34 #include <linux/kernel.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/i2c-id.h>
42 #include <linux/workqueue.h>
44 #include <media/ir-common.h>
45 #include <media/ir-kbd-i2c.h>
47 /* ----------------------------------------------------------------------- */
48 /* insmod parameters */
51 module_param(debug, int, 0644); /* debug level (0,1,2) */
54 module_param(hauppauge, int, 0644); /* Choose Hauppauge remote */
55 MODULE_PARM_DESC(hauppauge, "Specify Hauppauge remote: 0=black, 1=grey (defaults to 0)");
58 #define DEVNAME "ir-kbd-i2c"
59 #define dprintk(level, fmt, arg...) if (debug >= level) \
60 printk(KERN_DEBUG DEVNAME ": " fmt , ## arg)
62 /* ----------------------------------------------------------------------- */
64 static int get_key_haup_common(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw,
68 int start, range, toggle, dev, code;
71 if (size != i2c_master_recv(&ir->c,buf,size))
74 /* split rc5 data block ... */
75 start = (buf[offset] >> 7) & 1;
76 range = (buf[offset] >> 6) & 1;
77 toggle = (buf[offset] >> 5) & 1;
78 dev = buf[offset] & 0x1f;
79 code = (buf[offset+1] >> 2) & 0x3f;
81 /* rc5 has two start bits
82 * the first bit must be one
83 * the second bit defines the command range (1 = 0-63, 0 = 64 - 127)
92 dprintk(1,"ir hauppauge (rc5): s%d r%d t%d dev=%d code=%d\n",
93 start, range, toggle, dev, code);
97 *ir_raw = (start << 12) | (toggle << 11) | (dev << 6) | code;
101 static inline int get_key_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
103 return get_key_haup_common (ir, ir_key, ir_raw, 3, 0);
106 static inline int get_key_haup_xvr(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
108 return get_key_haup_common (ir, ir_key, ir_raw, 6, 3);
111 static int get_key_pixelview(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
116 if (1 != i2c_master_recv(&ir->c,&b,1)) {
117 dprintk(1,"read error\n");
125 static int get_key_pv951(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
130 if (1 != i2c_master_recv(&ir->c,&b,1)) {
131 dprintk(1,"read error\n");
138 dprintk(2,"key %02x\n", b);
145 static int get_key_fusionhdtv(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
147 unsigned char buf[4];
150 if (4 != i2c_master_recv(&ir->c,buf,4)) {
151 dprintk(1,"read error\n");
155 if(buf[0] !=0 || buf[1] !=0 || buf[2] !=0 || buf[3] != 0)
156 dprintk(2, "%s: 0x%2x 0x%2x 0x%2x 0x%2x\n", __func__,
157 buf[0], buf[1], buf[2], buf[3]);
159 /* no key pressed or signal from other ir remote */
160 if(buf[0] != 0x1 || buf[1] != 0xfe)
164 *ir_raw = (buf[2] << 8) | buf[3];
169 static int get_key_knc1(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
174 if (1 != i2c_master_recv(&ir->c,&b,1)) {
175 dprintk(1,"read error\n");
179 /* it seems that 0xFE indicates that a button is still hold
180 down, while 0xff indicates that no button is hold
181 down. 0xfe sequences are sometimes interrupted by 0xFF */
183 dprintk(2,"key %02x\n", b);
197 /* ----------------------------------------------------------------------- */
199 static void ir_key_poll(struct IR_i2c *ir)
201 static u32 ir_key, ir_raw;
204 dprintk(2,"ir_poll_key\n");
205 rc = ir->get_key(ir, &ir_key, &ir_raw);
207 dprintk(2,"error\n");
212 ir_input_nokey(ir->input, &ir->ir);
214 ir_input_keydown(ir->input, &ir->ir, ir_key, ir_raw);
218 static void ir_timer(unsigned long data)
220 struct IR_i2c *ir = (struct IR_i2c*)data;
221 schedule_work(&ir->work);
224 static void ir_work(struct work_struct *work)
226 struct IR_i2c *ir = container_of(work, struct IR_i2c, work);
229 mod_timer(&ir->timer, jiffies + msecs_to_jiffies(100));
232 /* ----------------------------------------------------------------------- */
234 static int ir_attach(struct i2c_adapter *adap, int addr,
235 unsigned short flags, int kind);
236 static int ir_detach(struct i2c_client *client);
237 static int ir_probe(struct i2c_adapter *adap);
239 static struct i2c_driver driver = {
241 .name = "ir-kbd-i2c",
243 .id = I2C_DRIVERID_INFRARED,
244 .attach_adapter = ir_probe,
245 .detach_client = ir_detach,
248 static struct i2c_client client_template =
254 static int ir_attach(struct i2c_adapter *adap, int addr,
255 unsigned short flags, int kind)
257 IR_KEYTAB_TYPE *ir_codes = NULL;
261 struct input_dev *input_dev;
264 ir = kzalloc(sizeof(struct IR_i2c),GFP_KERNEL);
265 input_dev = input_allocate_device();
266 if (!ir || !input_dev) {
271 ir->c = client_template;
272 ir->input = input_dev;
274 ir->c.adapter = adap;
277 i2c_set_clientdata(&ir->c, ir);
282 ir->get_key = get_key_pixelview;
283 ir_type = IR_TYPE_OTHER;
284 ir_codes = ir_codes_empty;
288 ir->get_key = get_key_pv951;
289 ir_type = IR_TYPE_OTHER;
290 ir_codes = ir_codes_pv951;
295 ir->get_key = get_key_haup;
296 ir_type = IR_TYPE_RC5;
297 if (hauppauge == 1) {
298 ir_codes = ir_codes_hauppauge_new;
300 ir_codes = ir_codes_rc5_tv;
305 ir->get_key = get_key_knc1;
306 ir_type = IR_TYPE_OTHER;
307 ir_codes = ir_codes_empty;
311 ir->get_key = get_key_fusionhdtv;
312 ir_type = IR_TYPE_RC5;
313 ir_codes = ir_codes_fusionhdtv_mce;
319 if (adap->id == I2C_HW_B_CX2388x) {
320 /* Handled by cx88-input */
321 name = "CX2388x remote";
322 ir_type = IR_TYPE_RC5;
323 ir->get_key = get_key_haup_xvr;
324 if (hauppauge == 1) {
325 ir_codes = ir_codes_hauppauge_new;
327 ir_codes = ir_codes_rc5_tv;
330 /* Handled by saa7134-input */
331 name = "SAA713x remote";
332 ir_type = IR_TYPE_OTHER;
336 /* shouldn't happen */
337 printk(DEVNAME ": Huh? unknown i2c address (0x%02x)?\n", addr);
343 snprintf(ir->c.name, sizeof(ir->c.name), "i2c IR (%s)", name);
344 ir->ir_codes = ir_codes;
346 /* register i2c device
347 * At device register, IR codes may be changed to be
350 err = i2c_attach_client(&ir->c);
354 /* If IR not supported or disabled, unregisters driver */
355 if (ir->get_key == NULL) {
360 /* Phys addr can only be set after attaching (for ir->c.dev.bus_id) */
361 snprintf(ir->phys, sizeof(ir->phys), "%s/%s/ir0",
362 ir->c.adapter->dev.bus_id,
365 /* init + register input device */
366 ir_input_init(input_dev, &ir->ir, ir_type, ir->ir_codes);
367 input_dev->id.bustype = BUS_I2C;
368 input_dev->name = ir->c.name;
369 input_dev->phys = ir->phys;
371 err = input_register_device(ir->input);
375 printk(DEVNAME ": %s detected at %s [%s]\n",
376 ir->input->name, ir->input->phys, adap->name);
378 /* start polling via eventd */
379 INIT_WORK(&ir->work, ir_work);
380 init_timer(&ir->timer);
381 ir->timer.function = ir_timer;
382 ir->timer.data = (unsigned long)ir;
383 schedule_work(&ir->work);
388 i2c_detach_client(&ir->c);
390 input_free_device(input_dev);
395 static int ir_detach(struct i2c_client *client)
397 struct IR_i2c *ir = i2c_get_clientdata(client);
399 /* kill outstanding polls */
400 del_timer_sync(&ir->timer);
401 flush_scheduled_work();
403 /* unregister devices */
404 input_unregister_device(ir->input);
405 i2c_detach_client(&ir->c);
412 static int ir_probe(struct i2c_adapter *adap)
415 /* The external IR receiver is at i2c address 0x34 (0x35 for
416 reads). Future Hauppauge cards will have an internal
417 receiver at 0x30 (0x31 for reads). In theory, both can be
418 fitted, and Hauppauge suggest an external overrides an
421 That's why we probe 0x1a (~0x34) first. CB
424 static const int probe_bttv[] = { 0x1a, 0x18, 0x4b, 0x64, 0x30, -1};
425 static const int probe_saa7134[] = { 0x7a, 0x47, 0x71, 0x2d, -1 };
426 static const int probe_em28XX[] = { 0x30, 0x47, -1 };
427 static const int probe_cx88[] = { 0x18, 0x6b, 0x71, -1 };
428 static const int probe_cx23885[] = { 0x6b, -1 };
430 struct i2c_msg msg = {
441 case I2C_HW_B_CX2341X:
445 probe = probe_saa7134;
447 case I2C_HW_B_EM28XX:
448 probe = probe_em28XX;
450 case I2C_HW_B_CX2388x:
453 case I2C_HW_B_CX23885:
454 probe = probe_cx23885;
460 for (i = 0; -1 != probe[i]; i++) {
462 rc = i2c_transfer(adap, &msg, 1);
463 dprintk(1,"probe 0x%02x @ %s: %s\n",
464 probe[i], adap->name,
465 (1 == rc) ? "yes" : "no");
467 ir_attach(adap, probe[i], 0, 0);
474 /* ----------------------------------------------------------------------- */
476 MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, Ulrich Mueller");
477 MODULE_DESCRIPTION("input driver for i2c IR remote controls");
478 MODULE_LICENSE("GPL");
480 static int __init ir_init(void)
482 return i2c_add_driver(&driver);
485 static void __exit ir_fini(void)
487 i2c_del_driver(&driver);
490 module_init(ir_init);
491 module_exit(ir_fini);
494 * Overrides for Emacs so that we follow Linus's tabbing style.
495 * ---------------------------------------------------------------------------