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/workqueue.h>
49 #include <media/rc-core.h>
50 #include <media/ir-kbd-i2c.h>
52 /* ----------------------------------------------------------------------- */
53 /* insmod parameters */
56 module_param(debug, int, 0644); /* debug level (0,1,2) */
59 module_param(hauppauge, int, 0644); /* Choose Hauppauge remote */
60 MODULE_PARM_DESC(hauppauge, "Specify Hauppauge remote: 0=black, 1=grey (defaults to 0)");
63 #define MODULE_NAME "ir-kbd-i2c"
64 #define dprintk(level, fmt, arg...) if (debug >= level) \
65 printk(KERN_DEBUG MODULE_NAME ": " fmt , ## arg)
67 /* ----------------------------------------------------------------------- */
69 static int get_key_haup_common(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw,
73 int start, range, toggle, dev, code, ircode;
76 if (size != i2c_master_recv(ir->c, buf, size))
79 /* split rc5 data block ... */
80 start = (buf[offset] >> 7) & 1;
81 range = (buf[offset] >> 6) & 1;
82 toggle = (buf[offset] >> 5) & 1;
83 dev = buf[offset] & 0x1f;
84 code = (buf[offset+1] >> 2) & 0x3f;
86 /* rc5 has two start bits
87 * the first bit must be one
88 * the second bit defines the command range (1 = 0-63, 0 = 64 - 127)
94 * Hauppauge remotes (black/silver) always use
95 * specific device ids. If we do not filter the
96 * device ids then messages destined for devices
97 * such as TVs (id=0) will get through causing
100 * We also filter out invalid key presses which
101 * produce annoying debug log entries.
103 ircode= (start << 12) | (toggle << 11) | (dev << 6) | code;
104 if ((ircode & 0x1fff)==0x1fff)
105 /* invalid key press */
108 if (dev!=0x1e && dev!=0x1f)
109 /* not a hauppauge remote */
115 dprintk(1,"ir hauppauge (rc5): s%d r%d t%d dev=%d code=%d\n",
116 start, range, toggle, dev, code);
124 static int get_key_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
126 return get_key_haup_common (ir, ir_key, ir_raw, 3, 0);
129 static int get_key_haup_xvr(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
131 return get_key_haup_common (ir, ir_key, ir_raw, 6, 3);
134 static int get_key_pixelview(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
139 if (1 != i2c_master_recv(ir->c, &b, 1)) {
140 dprintk(1,"read error\n");
148 static int get_key_fusionhdtv(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
150 unsigned char buf[4];
153 if (4 != i2c_master_recv(ir->c, buf, 4)) {
154 dprintk(1,"read error\n");
158 if(buf[0] !=0 || buf[1] !=0 || buf[2] !=0 || buf[3] != 0)
159 dprintk(2, "%s: 0x%2x 0x%2x 0x%2x 0x%2x\n", __func__,
160 buf[0], buf[1], buf[2], buf[3]);
162 /* no key pressed or signal from other ir remote */
163 if(buf[0] != 0x1 || buf[1] != 0xfe)
167 *ir_raw = (buf[2] << 8) | buf[3];
172 static int get_key_knc1(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
177 if (1 != i2c_master_recv(ir->c, &b, 1)) {
178 dprintk(1,"read error\n");
182 /* it seems that 0xFE indicates that a button is still hold
183 down, while 0xff indicates that no button is hold
184 down. 0xfe sequences are sometimes interrupted by 0xFF */
186 dprintk(2,"key %02x\n", b);
200 static int get_key_avermedia_cardbus(struct IR_i2c *ir,
201 u32 *ir_key, u32 *ir_raw)
203 unsigned char subaddr, key, keygroup;
204 struct i2c_msg msg[] = { { .addr = ir->c->addr, .flags = 0,
205 .buf = &subaddr, .len = 1},
206 { .addr = ir->c->addr, .flags = I2C_M_RD,
207 .buf = &key, .len = 1} };
209 if (2 != i2c_transfer(ir->c->adapter, msg, 2)) {
210 dprintk(1, "read error\n");
218 msg[1].buf = &keygroup;
219 if (2 != i2c_transfer(ir->c->adapter, msg, 2)) {
220 dprintk(1, "read error\n");
224 if (keygroup == 0xff)
227 dprintk(1, "read key 0x%02x/0x%02x\n", key, keygroup);
228 if (keygroup < 2 || keygroup > 3) {
230 dprintk(1, "warning: invalid key group 0x%02x for key 0x%02x\n",
233 key |= (keygroup & 1) << 6;
240 /* ----------------------------------------------------------------------- */
242 static void ir_key_poll(struct IR_i2c *ir)
244 static u32 ir_key, ir_raw;
247 dprintk(2,"ir_poll_key\n");
248 rc = ir->get_key(ir, &ir_key, &ir_raw);
250 dprintk(2,"error\n");
255 rc_keydown(ir->rc, ir_key, 0);
258 static void ir_work(struct work_struct *work)
260 struct IR_i2c *ir = container_of(work, struct IR_i2c, work.work);
263 schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling_interval));
266 /* ----------------------------------------------------------------------- */
268 static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id)
270 char *ir_codes = NULL;
271 const char *name = NULL;
272 u64 rc_type = RC_TYPE_UNKNOWN;
274 struct rc_dev *rc = NULL;
275 struct i2c_adapter *adap = client->adapter;
276 unsigned short addr = client->addr;
279 ir = kzalloc(sizeof(struct IR_i2c), GFP_KERNEL);
284 ir->polling_interval = DEFAULT_POLLING_INTERVAL;
285 i2c_set_clientdata(client, ir);
290 ir->get_key = get_key_pixelview;
291 rc_type = RC_TYPE_OTHER;
292 ir_codes = RC_MAP_EMPTY;
298 ir->get_key = get_key_haup;
299 rc_type = RC_TYPE_RC5;
300 if (hauppauge == 1) {
301 ir_codes = RC_MAP_HAUPPAUGE_NEW;
303 ir_codes = RC_MAP_RC5_TV;
308 ir->get_key = get_key_knc1;
309 rc_type = RC_TYPE_OTHER;
310 ir_codes = RC_MAP_EMPTY;
314 ir->get_key = get_key_fusionhdtv;
315 rc_type = RC_TYPE_RC5;
316 ir_codes = RC_MAP_FUSIONHDTV_MCE;
319 name = "AVerMedia Cardbus remote";
320 ir->get_key = get_key_avermedia_cardbus;
321 rc_type = RC_TYPE_OTHER;
322 ir_codes = RC_MAP_AVERMEDIA_CARDBUS;
326 /* Let the caller override settings */
327 if (client->dev.platform_data) {
328 const struct IR_i2c_init_data *init_data =
329 client->dev.platform_data;
331 ir_codes = init_data->ir_codes;
332 rc = init_data->rc_dev;
334 name = init_data->name;
336 rc_type = init_data->type;
338 if (init_data->polling_interval)
339 ir->polling_interval = init_data->polling_interval;
341 switch (init_data->internal_get_key_func) {
342 case IR_KBD_GET_KEY_CUSTOM:
343 /* The bridge driver provided us its own function */
344 ir->get_key = init_data->get_key;
346 case IR_KBD_GET_KEY_PIXELVIEW:
347 ir->get_key = get_key_pixelview;
349 case IR_KBD_GET_KEY_HAUP:
350 ir->get_key = get_key_haup;
352 case IR_KBD_GET_KEY_KNC1:
353 ir->get_key = get_key_knc1;
355 case IR_KBD_GET_KEY_FUSIONHDTV:
356 ir->get_key = get_key_fusionhdtv;
358 case IR_KBD_GET_KEY_HAUP_XVR:
359 ir->get_key = get_key_haup_xvr;
361 case IR_KBD_GET_KEY_AVERMEDIA_CARDBUS:
362 ir->get_key = get_key_avermedia_cardbus;
369 * If platform_data doesn't specify rc_dev, initilize it
372 rc = rc_allocate_device();
380 /* Make sure we are all setup before going on */
381 if (!name || !ir->get_key || !rc_type || !ir_codes) {
382 dprintk(1, ": Unsupported device at address 0x%02x\n",
389 snprintf(ir->name, sizeof(ir->name), "i2c IR (%s)", name);
390 ir->ir_codes = ir_codes;
392 snprintf(ir->phys, sizeof(ir->phys), "%s/%s/ir0",
393 dev_name(&adap->dev),
394 dev_name(&client->dev));
397 * Initialize input_dev fields
398 * It doesn't make sense to allow overriding them via platform_data
400 rc->input_id.bustype = BUS_I2C;
401 rc->input_phys = ir->phys;
402 rc->input_name = ir->name;
405 * Initialize the other fields of rc_dev
407 rc->map_name = ir->ir_codes;
408 rc->allowed_protos = rc_type;
409 if (!rc->driver_name)
410 rc->driver_name = MODULE_NAME;
412 err = rc_register_device(rc);
416 printk(MODULE_NAME ": %s detected at %s [%s]\n",
417 ir->name, ir->phys, adap->name);
419 /* start polling via eventd */
420 INIT_DELAYED_WORK(&ir->work, ir_work);
421 schedule_delayed_work(&ir->work, 0);
426 /* Only frees rc if it were allocated internally */
432 static int ir_remove(struct i2c_client *client)
434 struct IR_i2c *ir = i2c_get_clientdata(client);
436 /* kill outstanding polls */
437 cancel_delayed_work_sync(&ir->work);
439 /* unregister device */
440 rc_unregister_device(ir->rc);
447 static const struct i2c_device_id ir_kbd_id[] = {
448 /* Generic entry for any IR receiver */
450 /* IR device specific entries should be added here */
451 { "ir_rx_z8f0811_haup", 0 },
452 { "ir_rx_z8f0811_hdpvr", 0 },
456 static struct i2c_driver driver = {
458 .name = "ir-kbd-i2c",
462 .id_table = ir_kbd_id,
465 /* ----------------------------------------------------------------------- */
467 MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, Ulrich Mueller");
468 MODULE_DESCRIPTION("input driver for i2c IR remote controls");
469 MODULE_LICENSE("GPL");
471 static int __init ir_init(void)
473 return i2c_add_driver(&driver);
476 static void __exit ir_fini(void)
478 i2c_del_driver(&driver);
481 module_init(ir_init);
482 module_exit(ir_fini);
485 * Overrides for Emacs so that we follow Linus's tabbing style.
486 * ---------------------------------------------------------------------------