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, ircode;
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)
89 * Hauppauge remotes (black/silver) always use
90 * specific device ids. If we do not filter the
91 * device ids then messages destined for devices
92 * such as TVs (id=0) will get through causing
95 * We also filter out invalid key presses which
96 * produce annoying debug log entries.
98 ircode= (start << 12) | (toggle << 11) | (dev << 6) | code;
99 if ((ircode & 0x1fff)==0x1fff)
100 /* invalid key press */
103 if (dev!=0x1e && dev!=0x1f)
104 /* not a hauppauge remote */
110 dprintk(1,"ir hauppauge (rc5): s%d r%d t%d dev=%d code=%d\n",
111 start, range, toggle, dev, code);
119 static inline int get_key_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
121 return get_key_haup_common (ir, ir_key, ir_raw, 3, 0);
124 static inline int get_key_haup_xvr(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
126 return get_key_haup_common (ir, ir_key, ir_raw, 6, 3);
129 static int get_key_pixelview(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
134 if (1 != i2c_master_recv(&ir->c,&b,1)) {
135 dprintk(1,"read error\n");
143 static int get_key_pv951(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
148 if (1 != i2c_master_recv(&ir->c,&b,1)) {
149 dprintk(1,"read error\n");
156 dprintk(2,"key %02x\n", b);
163 static int get_key_fusionhdtv(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
165 unsigned char buf[4];
168 if (4 != i2c_master_recv(&ir->c,buf,4)) {
169 dprintk(1,"read error\n");
173 if(buf[0] !=0 || buf[1] !=0 || buf[2] !=0 || buf[3] != 0)
174 dprintk(2, "%s: 0x%2x 0x%2x 0x%2x 0x%2x\n", __func__,
175 buf[0], buf[1], buf[2], buf[3]);
177 /* no key pressed or signal from other ir remote */
178 if(buf[0] != 0x1 || buf[1] != 0xfe)
182 *ir_raw = (buf[2] << 8) | buf[3];
187 static int get_key_knc1(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
192 if (1 != i2c_master_recv(&ir->c,&b,1)) {
193 dprintk(1,"read error\n");
197 /* it seems that 0xFE indicates that a button is still hold
198 down, while 0xff indicates that no button is hold
199 down. 0xfe sequences are sometimes interrupted by 0xFF */
201 dprintk(2,"key %02x\n", b);
215 /* ----------------------------------------------------------------------- */
217 static void ir_key_poll(struct IR_i2c *ir)
219 static u32 ir_key, ir_raw;
222 dprintk(2,"ir_poll_key\n");
223 rc = ir->get_key(ir, &ir_key, &ir_raw);
225 dprintk(2,"error\n");
230 ir_input_nokey(ir->input, &ir->ir);
232 ir_input_keydown(ir->input, &ir->ir, ir_key, ir_raw);
236 static void ir_timer(unsigned long data)
238 struct IR_i2c *ir = (struct IR_i2c*)data;
239 schedule_work(&ir->work);
242 static void ir_work(struct work_struct *work)
244 struct IR_i2c *ir = container_of(work, struct IR_i2c, work);
247 mod_timer(&ir->timer, jiffies + msecs_to_jiffies(100));
250 /* ----------------------------------------------------------------------- */
252 static int ir_attach(struct i2c_adapter *adap, int addr,
253 unsigned short flags, int kind);
254 static int ir_detach(struct i2c_client *client);
255 static int ir_probe(struct i2c_adapter *adap);
257 static struct i2c_driver driver = {
259 .name = "ir-kbd-i2c",
261 .id = I2C_DRIVERID_INFRARED,
262 .attach_adapter = ir_probe,
263 .detach_client = ir_detach,
266 static struct i2c_client client_template =
272 static int ir_attach(struct i2c_adapter *adap, int addr,
273 unsigned short flags, int kind)
275 IR_KEYTAB_TYPE *ir_codes = NULL;
279 struct input_dev *input_dev;
282 ir = kzalloc(sizeof(struct IR_i2c),GFP_KERNEL);
283 input_dev = input_allocate_device();
284 if (!ir || !input_dev) {
289 ir->c = client_template;
290 ir->input = input_dev;
292 ir->c.adapter = adap;
295 i2c_set_clientdata(&ir->c, ir);
300 ir->get_key = get_key_pixelview;
301 ir_type = IR_TYPE_OTHER;
302 ir_codes = ir_codes_empty;
306 ir->get_key = get_key_pv951;
307 ir_type = IR_TYPE_OTHER;
308 ir_codes = ir_codes_pv951;
313 ir->get_key = get_key_haup;
314 ir_type = IR_TYPE_RC5;
315 if (hauppauge == 1) {
316 ir_codes = ir_codes_hauppauge_new;
318 ir_codes = ir_codes_rc5_tv;
323 ir->get_key = get_key_knc1;
324 ir_type = IR_TYPE_OTHER;
325 ir_codes = ir_codes_empty;
329 ir->get_key = get_key_fusionhdtv;
330 ir_type = IR_TYPE_RC5;
331 ir_codes = ir_codes_fusionhdtv_mce;
337 if (adap->id == I2C_HW_B_CX2388x) {
338 /* Handled by cx88-input */
339 name = "CX2388x remote";
340 ir_type = IR_TYPE_RC5;
341 ir->get_key = get_key_haup_xvr;
342 if (hauppauge == 1) {
343 ir_codes = ir_codes_hauppauge_new;
345 ir_codes = ir_codes_rc5_tv;
348 /* Handled by saa7134-input */
349 name = "SAA713x remote";
350 ir_type = IR_TYPE_OTHER;
354 /* shouldn't happen */
355 printk(DEVNAME ": Huh? unknown i2c address (0x%02x)?\n", addr);
361 snprintf(ir->c.name, sizeof(ir->c.name), "i2c IR (%s)", name);
362 ir->ir_codes = ir_codes;
364 /* register i2c device
365 * At device register, IR codes may be changed to be
368 err = i2c_attach_client(&ir->c);
372 /* If IR not supported or disabled, unregisters driver */
373 if (ir->get_key == NULL) {
378 /* Phys addr can only be set after attaching (for ir->c.dev.bus_id) */
379 snprintf(ir->phys, sizeof(ir->phys), "%s/%s/ir0",
380 ir->c.adapter->dev.bus_id,
383 /* init + register input device */
384 ir_input_init(input_dev, &ir->ir, ir_type, ir->ir_codes);
385 input_dev->id.bustype = BUS_I2C;
386 input_dev->name = ir->c.name;
387 input_dev->phys = ir->phys;
389 err = input_register_device(ir->input);
393 printk(DEVNAME ": %s detected at %s [%s]\n",
394 ir->input->name, ir->input->phys, adap->name);
396 /* start polling via eventd */
397 INIT_WORK(&ir->work, ir_work);
398 init_timer(&ir->timer);
399 ir->timer.function = ir_timer;
400 ir->timer.data = (unsigned long)ir;
401 schedule_work(&ir->work);
406 i2c_detach_client(&ir->c);
408 input_free_device(input_dev);
413 static int ir_detach(struct i2c_client *client)
415 struct IR_i2c *ir = i2c_get_clientdata(client);
417 /* kill outstanding polls */
418 del_timer_sync(&ir->timer);
419 flush_scheduled_work();
421 /* unregister devices */
422 input_unregister_device(ir->input);
423 i2c_detach_client(&ir->c);
430 static int ir_probe(struct i2c_adapter *adap)
433 /* The external IR receiver is at i2c address 0x34 (0x35 for
434 reads). Future Hauppauge cards will have an internal
435 receiver at 0x30 (0x31 for reads). In theory, both can be
436 fitted, and Hauppauge suggest an external overrides an
439 That's why we probe 0x1a (~0x34) first. CB
442 static const int probe_bttv[] = { 0x1a, 0x18, 0x4b, 0x64, 0x30, -1};
443 static const int probe_saa7134[] = { 0x7a, 0x47, 0x71, 0x2d, -1 };
444 static const int probe_em28XX[] = { 0x30, 0x47, -1 };
445 static const int probe_cx88[] = { 0x18, 0x6b, 0x71, -1 };
446 static const int probe_cx23885[] = { 0x6b, -1 };
448 struct i2c_msg msg = {
459 case I2C_HW_B_CX2341X:
463 probe = probe_saa7134;
465 case I2C_HW_B_EM28XX:
466 probe = probe_em28XX;
468 case I2C_HW_B_CX2388x:
471 case I2C_HW_B_CX23885:
472 probe = probe_cx23885;
478 for (i = 0; -1 != probe[i]; i++) {
480 rc = i2c_transfer(adap, &msg, 1);
481 dprintk(1,"probe 0x%02x @ %s: %s\n",
482 probe[i], adap->name,
483 (1 == rc) ? "yes" : "no");
485 ir_attach(adap, probe[i], 0, 0);
492 /* ----------------------------------------------------------------------- */
494 MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, Ulrich Mueller");
495 MODULE_DESCRIPTION("input driver for i2c IR remote controls");
496 MODULE_LICENSE("GPL");
498 static int __init ir_init(void)
500 return i2c_add_driver(&driver);
503 static void __exit ir_fini(void)
505 i2c_del_driver(&driver);
508 module_init(ir_init);
509 module_exit(ir_fini);
512 * Overrides for Emacs so that we follow Linus's tabbing style.
513 * ---------------------------------------------------------------------------