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>
15 * modified for MSI TV@nywhere Plus by
16 * Henry Wong <henry@stuffedcow.net>
17 * Mark Schultz <n9xmj@yahoo.com>
18 * Brian Rogers <brian_rogers@comcast.net>
19 * modified for AVerMedia Cardbus by
20 * Oldrich Jedlicka <oldium.pro@seznam.cz>
22 * This program is free software; you can redistribute it and/or modify
23 * it under the terms of the GNU General Public License as published by
24 * the Free Software Foundation; either version 2 of the License, or
25 * (at your option) any later version.
27 * This program is distributed in the hope that it will be useful,
28 * but WITHOUT ANY WARRANTY; without even the implied warranty of
29 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
30 * GNU General Public License for more details.
32 * You should have received a copy of the GNU General Public License
33 * along with this program; if not, write to the Free Software
34 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
38 #include <linux/module.h>
39 #include <linux/init.h>
40 #include <linux/kernel.h>
41 #include <linux/string.h>
42 #include <linux/timer.h>
43 #include <linux/delay.h>
44 #include <linux/errno.h>
45 #include <linux/slab.h>
46 #include <linux/i2c.h>
47 #include <linux/i2c-id.h>
48 #include <linux/workqueue.h>
50 #include <media/ir-common.h>
51 #include <media/ir-kbd-i2c.h>
53 /* ----------------------------------------------------------------------- */
54 /* insmod parameters */
57 module_param(debug, int, 0644); /* debug level (0,1,2) */
60 module_param(hauppauge, int, 0644); /* Choose Hauppauge remote */
61 MODULE_PARM_DESC(hauppauge, "Specify Hauppauge remote: 0=black, 1=grey (defaults to 0)");
64 #define DEVNAME "ir-kbd-i2c"
65 #define dprintk(level, fmt, arg...) if (debug >= level) \
66 printk(KERN_DEBUG DEVNAME ": " fmt , ## arg)
68 /* ----------------------------------------------------------------------- */
70 static int get_key_haup_common(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw,
74 int start, range, toggle, dev, code, ircode;
77 if (size != i2c_master_recv(ir->c, buf, size))
80 /* split rc5 data block ... */
81 start = (buf[offset] >> 7) & 1;
82 range = (buf[offset] >> 6) & 1;
83 toggle = (buf[offset] >> 5) & 1;
84 dev = buf[offset] & 0x1f;
85 code = (buf[offset+1] >> 2) & 0x3f;
87 /* rc5 has two start bits
88 * the first bit must be one
89 * the second bit defines the command range (1 = 0-63, 0 = 64 - 127)
95 * Hauppauge remotes (black/silver) always use
96 * specific device ids. If we do not filter the
97 * device ids then messages destined for devices
98 * such as TVs (id=0) will get through causing
101 * We also filter out invalid key presses which
102 * produce annoying debug log entries.
104 ircode= (start << 12) | (toggle << 11) | (dev << 6) | code;
105 if ((ircode & 0x1fff)==0x1fff)
106 /* invalid key press */
109 if (dev!=0x1e && dev!=0x1f)
110 /* not a hauppauge remote */
116 dprintk(1,"ir hauppauge (rc5): s%d r%d t%d dev=%d code=%d\n",
117 start, range, toggle, dev, code);
125 static inline int get_key_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
127 return get_key_haup_common (ir, ir_key, ir_raw, 3, 0);
130 static inline int get_key_haup_xvr(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
132 return get_key_haup_common (ir, ir_key, ir_raw, 6, 3);
135 static int get_key_pixelview(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
140 if (1 != i2c_master_recv(ir->c, &b, 1)) {
141 dprintk(1,"read error\n");
149 static int get_key_pv951(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
154 if (1 != i2c_master_recv(ir->c, &b, 1)) {
155 dprintk(1,"read error\n");
162 dprintk(2,"key %02x\n", b);
169 static int get_key_fusionhdtv(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
171 unsigned char buf[4];
174 if (4 != i2c_master_recv(ir->c, buf, 4)) {
175 dprintk(1,"read error\n");
179 if(buf[0] !=0 || buf[1] !=0 || buf[2] !=0 || buf[3] != 0)
180 dprintk(2, "%s: 0x%2x 0x%2x 0x%2x 0x%2x\n", __func__,
181 buf[0], buf[1], buf[2], buf[3]);
183 /* no key pressed or signal from other ir remote */
184 if(buf[0] != 0x1 || buf[1] != 0xfe)
188 *ir_raw = (buf[2] << 8) | buf[3];
193 static int get_key_knc1(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
198 if (1 != i2c_master_recv(ir->c, &b, 1)) {
199 dprintk(1,"read error\n");
203 /* it seems that 0xFE indicates that a button is still hold
204 down, while 0xff indicates that no button is hold
205 down. 0xfe sequences are sometimes interrupted by 0xFF */
207 dprintk(2,"key %02x\n", b);
221 static int get_key_avermedia_cardbus(struct IR_i2c *ir,
222 u32 *ir_key, u32 *ir_raw)
224 unsigned char subaddr, key, keygroup;
225 struct i2c_msg msg[] = { { .addr = ir->c->addr, .flags = 0,
226 .buf = &subaddr, .len = 1},
227 { .addr = ir->c->addr, .flags = I2C_M_RD,
228 .buf = &key, .len = 1} };
230 if (2 != i2c_transfer(ir->c->adapter, msg, 2)) {
231 dprintk(1, "read error\n");
239 msg[1].buf = &keygroup;
240 if (2 != i2c_transfer(ir->c->adapter, msg, 2)) {
241 dprintk(1, "read error\n");
245 if (keygroup == 0xff)
248 dprintk(1, "read key 0x%02x/0x%02x\n", key, keygroup);
249 if (keygroup < 2 || keygroup > 3) {
251 dprintk(1, "warning: invalid key group 0x%02x for key 0x%02x\n",
254 key |= (keygroup & 1) << 6;
261 /* ----------------------------------------------------------------------- */
263 static void ir_key_poll(struct IR_i2c *ir)
265 static u32 ir_key, ir_raw;
268 dprintk(2,"ir_poll_key\n");
269 rc = ir->get_key(ir, &ir_key, &ir_raw);
271 dprintk(2,"error\n");
276 ir_input_nokey(ir->input, &ir->ir);
278 ir_input_keydown(ir->input, &ir->ir, ir_key, ir_raw);
282 static void ir_work(struct work_struct *work)
284 struct IR_i2c *ir = container_of(work, struct IR_i2c, work.work);
285 int polling_interval = 100;
287 /* MSI TV@nywhere Plus requires more frequent polling
288 otherwise it will miss some keypresses */
289 if (ir->c->adapter->id == I2C_HW_SAA7134 && ir->c->addr == 0x30)
290 polling_interval = 50;
293 schedule_delayed_work(&ir->work, msecs_to_jiffies(polling_interval));
296 /* ----------------------------------------------------------------------- */
298 static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id)
300 IR_KEYTAB_TYPE *ir_codes = NULL;
301 const char *name = NULL;
304 struct input_dev *input_dev;
305 struct i2c_adapter *adap = client->adapter;
306 unsigned short addr = client->addr;
309 ir = kzalloc(sizeof(struct IR_i2c),GFP_KERNEL);
310 input_dev = input_allocate_device();
311 if (!ir || !input_dev) {
317 ir->input = input_dev;
318 i2c_set_clientdata(client, ir);
323 ir->get_key = get_key_pixelview;
324 ir_type = IR_TYPE_OTHER;
325 ir_codes = ir_codes_empty;
329 ir->get_key = get_key_pv951;
330 ir_type = IR_TYPE_OTHER;
331 ir_codes = ir_codes_pv951;
336 ir->get_key = get_key_haup;
337 ir_type = IR_TYPE_RC5;
338 if (hauppauge == 1) {
339 ir_codes = ir_codes_hauppauge_new;
341 ir_codes = ir_codes_rc5_tv;
346 ir->get_key = get_key_knc1;
347 ir_type = IR_TYPE_OTHER;
348 ir_codes = ir_codes_empty;
352 ir->get_key = get_key_fusionhdtv;
353 ir_type = IR_TYPE_RC5;
354 ir_codes = ir_codes_fusionhdtv_mce;
360 if (adap->id == I2C_HW_B_CX2388x) {
361 /* Handled by cx88-input */
362 name = "CX2388x remote";
363 ir_type = IR_TYPE_RC5;
364 ir->get_key = get_key_haup_xvr;
365 if (hauppauge == 1) {
366 ir_codes = ir_codes_hauppauge_new;
368 ir_codes = ir_codes_rc5_tv;
371 /* Handled by saa7134-input */
372 name = "SAA713x remote";
373 ir_type = IR_TYPE_OTHER;
377 name = "AVerMedia Cardbus remote";
378 ir->get_key = get_key_avermedia_cardbus;
379 ir_type = IR_TYPE_OTHER;
380 ir_codes = ir_codes_avermedia_cardbus;
383 dprintk(1, DEVNAME ": Unsupported i2c address 0x%02x\n", addr);
388 /* Let the caller override settings */
389 if (client->dev.platform_data) {
390 const struct IR_i2c_init_data *init_data =
391 client->dev.platform_data;
393 ir_codes = init_data->ir_codes;
394 name = init_data->name;
395 ir->get_key = init_data->get_key;
398 /* Make sure we are all setup before going on */
399 if (!name || !ir->get_key || !ir_codes) {
400 dprintk(1, DEVNAME ": Unsupported device at address 0x%02x\n",
407 snprintf(ir->name, sizeof(ir->name), "i2c IR (%s)", name);
408 ir->ir_codes = ir_codes;
410 snprintf(ir->phys, sizeof(ir->phys), "%s/%s/ir0",
411 dev_name(&adap->dev),
412 dev_name(&client->dev));
414 /* init + register input device */
415 ir_input_init(input_dev, &ir->ir, ir_type, ir->ir_codes);
416 input_dev->id.bustype = BUS_I2C;
417 input_dev->name = ir->name;
418 input_dev->phys = ir->phys;
420 err = input_register_device(ir->input);
424 printk(DEVNAME ": %s detected at %s [%s]\n",
425 ir->input->name, ir->input->phys, adap->name);
427 /* start polling via eventd */
428 INIT_DELAYED_WORK(&ir->work, ir_work);
429 schedule_delayed_work(&ir->work, 0);
434 input_free_device(input_dev);
439 static int ir_remove(struct i2c_client *client)
441 struct IR_i2c *ir = i2c_get_clientdata(client);
443 /* kill outstanding polls */
444 cancel_delayed_work_sync(&ir->work);
446 /* unregister device */
447 input_unregister_device(ir->input);
454 static const struct i2c_device_id ir_kbd_id[] = {
455 /* Generic entry for any IR receiver */
457 /* IR device specific entries could be added here */
461 static struct i2c_driver driver = {
463 .name = "ir-kbd-i2c",
467 .id_table = ir_kbd_id,
470 /* ----------------------------------------------------------------------- */
472 MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, Ulrich Mueller");
473 MODULE_DESCRIPTION("input driver for i2c IR remote controls");
474 MODULE_LICENSE("GPL");
476 static int __init ir_init(void)
478 return i2c_add_driver(&driver);
481 static void __exit ir_fini(void)
483 i2c_del_driver(&driver);
486 module_init(ir_init);
487 module_exit(ir_fini);
490 * Overrides for Emacs so that we follow Linus's tabbing style.
491 * ---------------------------------------------------------------------------