3 * keyboard input driver for i2c IR remote controls
6 * modified for PixelView (BT878P+W/FM) by
9 * modified for KNC ONE TV Station/Anubis Typhoon TView Tuner by
11 * modified for em2820 based USB TV tuners by
13 * modified for DViCO Fusion HDTV 5 RT GOLD by
15 * modified for MSI TV@nywhere Plus by
19 * modified for AVerMedia Cardbus by
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 #define MODULE_NAME "ir-kbd-i2c"
60 #define dprintk(level, fmt, arg...) if (debug >= level) \
61 printk(KERN_DEBUG MODULE_NAME ": " fmt , ## arg)
63 /* ----------------------------------------------------------------------- */
65 static int get_key_haup_common(struct IR_i2c *ir, enum rc_type *protocol,
66 u32 *scancode, u8 *ptoggle, int size, int offset)
69 int start, range, toggle, dev, code, ircode;
72 if (size != i2c_master_recv(ir->c, buf, size))
75 /* split rc5 data block ... */
76 start = (buf[offset] >> 7) & 1;
77 range = (buf[offset] >> 6) & 1;
78 toggle = (buf[offset] >> 5) & 1;
79 dev = buf[offset] & 0x1f;
80 code = (buf[offset+1] >> 2) & 0x3f;
82 /* rc5 has two start bits
83 * the first bit must be one
84 * the second bit defines the command range (1 = 0-63, 0 = 64 - 127)
90 /* filter out invalid key presses */
91 ircode = (start << 12) | (toggle << 11) | (dev << 6) | code;
92 if ((ircode & 0x1fff) == 0x1fff)
98 dprintk(1,"ir hauppauge (rc5): s%d r%d t%d dev=%d code=%d\n",
99 start, range, toggle, dev, code);
101 *protocol = RC_TYPE_RC5;
102 *scancode = RC_SCANCODE_RC5(dev, code);
107 static int get_key_haup(struct IR_i2c *ir, enum rc_type *protocol,
108 u32 *scancode, u8 *toggle)
110 return get_key_haup_common (ir, protocol, scancode, toggle, 3, 0);
113 static int get_key_haup_xvr(struct IR_i2c *ir, enum rc_type *protocol,
114 u32 *scancode, u8 *toggle)
117 unsigned char buf[1] = { 0 };
120 * This is the same apparent "are you ready?" poll command observed
121 * watching Windows driver traffic and implemented in lirc_zilog. With
122 * this added, we get far saner remote behavior with z8 chips on usb
123 * connected devices, even with the default polling interval of 100ms.
125 ret = i2c_master_send(ir->c, buf, 1);
127 return (ret < 0) ? ret : -EINVAL;
129 return get_key_haup_common(ir, protocol, scancode, toggle, 6, 3);
132 static int get_key_pixelview(struct IR_i2c *ir, enum rc_type *protocol,
133 u32 *scancode, u8 *toggle)
138 if (1 != i2c_master_recv(ir->c, &b, 1)) {
139 dprintk(1,"read error\n");
143 *protocol = RC_TYPE_OTHER;
149 static int get_key_fusionhdtv(struct IR_i2c *ir, enum rc_type *protocol,
150 u32 *scancode, u8 *toggle)
152 unsigned char buf[4];
155 if (4 != i2c_master_recv(ir->c, buf, 4)) {
156 dprintk(1,"read error\n");
160 if(buf[0] !=0 || buf[1] !=0 || buf[2] !=0 || buf[3] != 0)
161 dprintk(2, "%s: 0x%2x 0x%2x 0x%2x 0x%2x\n", __func__,
162 buf[0], buf[1], buf[2], buf[3]);
164 /* no key pressed or signal from other ir remote */
165 if(buf[0] != 0x1 || buf[1] != 0xfe)
168 *protocol = RC_TYPE_UNKNOWN;
174 static int get_key_knc1(struct IR_i2c *ir, enum rc_type *protocol,
175 u32 *scancode, u8 *toggle)
180 if (1 != i2c_master_recv(ir->c, &b, 1)) {
181 dprintk(1,"read error\n");
185 /* it seems that 0xFE indicates that a button is still hold
186 down, while 0xff indicates that no button is hold
187 down. 0xfe sequences are sometimes interrupted by 0xFF */
189 dprintk(2,"key %02x\n", b);
198 *protocol = RC_TYPE_UNKNOWN;
204 static int get_key_avermedia_cardbus(struct IR_i2c *ir, enum rc_type *protocol,
205 u32 *scancode, u8 *toggle)
207 unsigned char subaddr, key, keygroup;
208 struct i2c_msg msg[] = { { .addr = ir->c->addr, .flags = 0,
209 .buf = &subaddr, .len = 1},
210 { .addr = ir->c->addr, .flags = I2C_M_RD,
211 .buf = &key, .len = 1} };
213 if (2 != i2c_transfer(ir->c->adapter, msg, 2)) {
214 dprintk(1, "read error\n");
222 msg[1].buf = &keygroup;
223 if (2 != i2c_transfer(ir->c->adapter, msg, 2)) {
224 dprintk(1, "read error\n");
228 if (keygroup == 0xff)
231 dprintk(1, "read key 0x%02x/0x%02x\n", key, keygroup);
232 if (keygroup < 2 || keygroup > 4) {
234 dprintk(1, "warning: invalid key group 0x%02x for key 0x%02x\n",
237 key |= (keygroup & 1) << 6;
239 *protocol = RC_TYPE_UNKNOWN;
241 if (ir->c->addr == 0x41) /* AVerMedia EM78P153 */
242 *scancode |= keygroup << 8;
247 /* ----------------------------------------------------------------------- */
249 static int ir_key_poll(struct IR_i2c *ir)
251 enum rc_type protocol;
256 dprintk(3, "%s\n", __func__);
257 rc = ir->get_key(ir, &protocol, &scancode, &toggle);
259 dprintk(2,"error\n");
264 dprintk(1, "%s: proto = 0x%04x, scancode = 0x%08x\n",
265 __func__, protocol, scancode);
266 rc_keydown(ir->rc, protocol, scancode, toggle);
271 static void ir_work(struct work_struct *work)
274 struct IR_i2c *ir = container_of(work, struct IR_i2c, work.work);
276 rc = ir_key_poll(ir);
278 rc_unregister_device(ir->rc);
283 schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling_interval));
286 /* ----------------------------------------------------------------------- */
288 static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id)
290 char *ir_codes = NULL;
291 const char *name = NULL;
292 u64 rc_type = RC_BIT_UNKNOWN;
294 struct rc_dev *rc = NULL;
295 struct i2c_adapter *adap = client->adapter;
296 unsigned short addr = client->addr;
299 ir = devm_kzalloc(&client->dev, sizeof(*ir), GFP_KERNEL);
304 ir->polling_interval = DEFAULT_POLLING_INTERVAL;
305 i2c_set_clientdata(client, ir);
310 ir->get_key = get_key_pixelview;
311 rc_type = RC_BIT_OTHER;
312 ir_codes = RC_MAP_EMPTY;
318 ir->get_key = get_key_haup;
319 rc_type = RC_BIT_RC5;
320 ir_codes = RC_MAP_HAUPPAUGE;
324 ir->get_key = get_key_knc1;
325 rc_type = RC_BIT_OTHER;
326 ir_codes = RC_MAP_EMPTY;
330 ir->get_key = get_key_fusionhdtv;
331 rc_type = RC_BIT_UNKNOWN;
332 ir_codes = RC_MAP_FUSIONHDTV_MCE;
335 name = "AVerMedia Cardbus remote";
336 ir->get_key = get_key_avermedia_cardbus;
337 rc_type = RC_BIT_OTHER;
338 ir_codes = RC_MAP_AVERMEDIA_CARDBUS;
341 name = "AVerMedia EM78P153";
342 ir->get_key = get_key_avermedia_cardbus;
343 rc_type = RC_BIT_OTHER;
344 /* RM-KV remote, seems to be same as RM-K6 */
345 ir_codes = RC_MAP_AVERMEDIA_M733A_RM_K6;
348 name = "Hauppauge/Zilog Z8";
349 ir->get_key = get_key_haup_xvr;
350 rc_type = RC_BIT_RC5;
351 ir_codes = RC_MAP_HAUPPAUGE;
355 /* Let the caller override settings */
356 if (client->dev.platform_data) {
357 const struct IR_i2c_init_data *init_data =
358 client->dev.platform_data;
360 ir_codes = init_data->ir_codes;
361 rc = init_data->rc_dev;
363 name = init_data->name;
365 rc_type = init_data->type;
367 if (init_data->polling_interval)
368 ir->polling_interval = init_data->polling_interval;
370 switch (init_data->internal_get_key_func) {
371 case IR_KBD_GET_KEY_CUSTOM:
372 /* The bridge driver provided us its own function */
373 ir->get_key = init_data->get_key;
375 case IR_KBD_GET_KEY_PIXELVIEW:
376 ir->get_key = get_key_pixelview;
378 case IR_KBD_GET_KEY_HAUP:
379 ir->get_key = get_key_haup;
381 case IR_KBD_GET_KEY_KNC1:
382 ir->get_key = get_key_knc1;
384 case IR_KBD_GET_KEY_FUSIONHDTV:
385 ir->get_key = get_key_fusionhdtv;
387 case IR_KBD_GET_KEY_HAUP_XVR:
388 ir->get_key = get_key_haup_xvr;
390 case IR_KBD_GET_KEY_AVERMEDIA_CARDBUS:
391 ir->get_key = get_key_avermedia_cardbus;
398 * If platform_data doesn't specify rc_dev, initialize it
401 rc = rc_allocate_device();
407 /* Make sure we are all setup before going on */
408 if (!name || !ir->get_key || !rc_type || !ir_codes) {
409 dprintk(1, ": Unsupported device at address 0x%02x\n",
416 snprintf(ir->name, sizeof(ir->name), "i2c IR (%s)", name);
417 ir->ir_codes = ir_codes;
419 snprintf(ir->phys, sizeof(ir->phys), "%s/%s/ir0",
420 dev_name(&adap->dev),
421 dev_name(&client->dev));
424 * Initialize input_dev fields
425 * It doesn't make sense to allow overriding them via platform_data
427 rc->input_id.bustype = BUS_I2C;
428 rc->input_phys = ir->phys;
429 rc->input_name = ir->name;
432 * Initialize the other fields of rc_dev
434 rc->map_name = ir->ir_codes;
435 rc->allowed_protocols = rc_type;
436 rc->enabled_protocols = rc_type;
437 if (!rc->driver_name)
438 rc->driver_name = MODULE_NAME;
440 err = rc_register_device(rc);
444 printk(MODULE_NAME ": %s detected at %s [%s]\n",
445 ir->name, ir->phys, adap->name);
447 /* start polling via eventd */
448 INIT_DELAYED_WORK(&ir->work, ir_work);
449 schedule_delayed_work(&ir->work, 0);
454 /* Only frees rc if it were allocated internally */
459 static int ir_remove(struct i2c_client *client)
461 struct IR_i2c *ir = i2c_get_clientdata(client);
463 /* kill outstanding polls */
464 cancel_delayed_work_sync(&ir->work);
466 /* unregister device */
467 rc_unregister_device(ir->rc);
473 static const struct i2c_device_id ir_kbd_id[] = {
474 /* Generic entry for any IR receiver */
476 /* IR device specific entries should be added here */
477 { "ir_rx_z8f0811_haup", 0 },
478 { "ir_rx_z8f0811_hdpvr", 0 },
482 static struct i2c_driver ir_kbd_driver = {
484 .name = "ir-kbd-i2c",
488 .id_table = ir_kbd_id,
491 module_i2c_driver(ir_kbd_driver);
493 /* ----------------------------------------------------------------------- */
495 MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, Ulrich Mueller");
496 MODULE_DESCRIPTION("input driver for i2c IR remote controls");
497 MODULE_LICENSE("GPL");