Merge tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[sfrench/cifs-2.6.git] / drivers / media / i2c / ir-kbd-i2c.c
1 /*
2  *
3  * keyboard input driver for i2c IR remote controls
4  *
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>
21  *
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.
26  *
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.
31  *
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
35  *
36  */
37
38 #include <asm/unaligned.h>
39 #include <linux/module.h>
40 #include <linux/init.h>
41 #include <linux/kernel.h>
42 #include <linux/string.h>
43 #include <linux/timer.h>
44 #include <linux/delay.h>
45 #include <linux/errno.h>
46 #include <linux/slab.h>
47 #include <linux/i2c.h>
48 #include <linux/workqueue.h>
49
50 #include <media/rc-core.h>
51 #include <media/i2c/ir-kbd-i2c.h>
52
53 /* ----------------------------------------------------------------------- */
54 /* insmod parameters                                                       */
55
56 static int debug;
57 module_param(debug, int, 0644);    /* debug level (0,1,2) */
58
59
60 #define MODULE_NAME "ir-kbd-i2c"
61 #define dprintk(level, fmt, arg...)     if (debug >= level) \
62         printk(KERN_DEBUG MODULE_NAME ": " fmt , ## arg)
63
64 /* ----------------------------------------------------------------------- */
65
66 static int get_key_haup_common(struct IR_i2c *ir, enum rc_type *protocol,
67                                         u32 *scancode, u8 *ptoggle, int size)
68 {
69         unsigned char buf[6];
70         int start, range, toggle, dev, code, ircode, vendor;
71
72         /* poll IR chip */
73         if (size != i2c_master_recv(ir->c, buf, size))
74                 return -EIO;
75
76         if (buf[0] & 0x80) {
77                 int offset = (size == 6) ? 3 : 0;
78
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;
85
86                 /* rc5 has two start bits
87                  * the first bit must be one
88                  * the second bit defines the command range:
89                  * 1 = 0-63, 0 = 64 - 127
90                  */
91                 if (!start)
92                         /* no key pressed */
93                         return 0;
94
95                 /* filter out invalid key presses */
96                 ircode = (start << 12) | (toggle << 11) | (dev << 6) | code;
97                 if ((ircode & 0x1fff) == 0x1fff)
98                         return 0;
99
100                 if (!range)
101                         code += 64;
102
103                 dprintk(1, "ir hauppauge (rc5): s%d r%d t%d dev=%d code=%d\n",
104                         start, range, toggle, dev, code);
105
106                 *protocol = RC_TYPE_RC5;
107                 *scancode = RC_SCANCODE_RC5(dev, code);
108                 *ptoggle = toggle;
109
110                 return 1;
111         } else if (size == 6 && (buf[0] & 0x40)) {
112                 code = buf[4];
113                 dev = buf[3];
114                 vendor = get_unaligned_be16(buf + 1);
115
116                 if (vendor == 0x800f) {
117                         *ptoggle = (dev & 0x80) != 0;
118                         *protocol = RC_TYPE_RC6_MCE;
119                         dev &= 0x7f;
120                         dprintk(1, "ir hauppauge (rc6-mce): t%d vendor=%d dev=%d code=%d\n",
121                                                 *ptoggle, vendor, dev, code);
122                 } else {
123                         *ptoggle = 0;
124                         *protocol = RC_TYPE_RC6_6A_32;
125                         dprintk(1, "ir hauppauge (rc6-6a-32): vendor=%d dev=%d code=%d\n",
126                                                         vendor, dev, code);
127                 }
128
129                 *scancode = RC_SCANCODE_RC6_6A(vendor, dev, code);
130
131                 return 1;
132         }
133
134         return 0;
135 }
136
137 static int get_key_haup(struct IR_i2c *ir, enum rc_type *protocol,
138                         u32 *scancode, u8 *toggle)
139 {
140         return get_key_haup_common(ir, protocol, scancode, toggle, 3);
141 }
142
143 static int get_key_haup_xvr(struct IR_i2c *ir, enum rc_type *protocol,
144                             u32 *scancode, u8 *toggle)
145 {
146         int ret;
147         unsigned char buf[1] = { 0 };
148
149         /*
150          * This is the same apparent "are you ready?" poll command observed
151          * watching Windows driver traffic and implemented in lirc_zilog. With
152          * this added, we get far saner remote behavior with z8 chips on usb
153          * connected devices, even with the default polling interval of 100ms.
154          */
155         ret = i2c_master_send(ir->c, buf, 1);
156         if (ret != 1)
157                 return (ret < 0) ? ret : -EINVAL;
158
159         return get_key_haup_common(ir, protocol, scancode, toggle, 6);
160 }
161
162 static int get_key_pixelview(struct IR_i2c *ir, enum rc_type *protocol,
163                              u32 *scancode, u8 *toggle)
164 {
165         unsigned char b;
166
167         /* poll IR chip */
168         if (1 != i2c_master_recv(ir->c, &b, 1)) {
169                 dprintk(1,"read error\n");
170                 return -EIO;
171         }
172
173         *protocol = RC_TYPE_OTHER;
174         *scancode = b;
175         *toggle = 0;
176         return 1;
177 }
178
179 static int get_key_fusionhdtv(struct IR_i2c *ir, enum rc_type *protocol,
180                               u32 *scancode, u8 *toggle)
181 {
182         unsigned char buf[4];
183
184         /* poll IR chip */
185         if (4 != i2c_master_recv(ir->c, buf, 4)) {
186                 dprintk(1,"read error\n");
187                 return -EIO;
188         }
189
190         if(buf[0] !=0 || buf[1] !=0 || buf[2] !=0 || buf[3] != 0)
191                 dprintk(2, "%s: 0x%2x 0x%2x 0x%2x 0x%2x\n", __func__,
192                         buf[0], buf[1], buf[2], buf[3]);
193
194         /* no key pressed or signal from other ir remote */
195         if(buf[0] != 0x1 ||  buf[1] != 0xfe)
196                 return 0;
197
198         *protocol = RC_TYPE_UNKNOWN;
199         *scancode = buf[2];
200         *toggle = 0;
201         return 1;
202 }
203
204 static int get_key_knc1(struct IR_i2c *ir, enum rc_type *protocol,
205                         u32 *scancode, u8 *toggle)
206 {
207         unsigned char b;
208
209         /* poll IR chip */
210         if (1 != i2c_master_recv(ir->c, &b, 1)) {
211                 dprintk(1,"read error\n");
212                 return -EIO;
213         }
214
215         /* it seems that 0xFE indicates that a button is still hold
216            down, while 0xff indicates that no button is hold
217            down. 0xfe sequences are sometimes interrupted by 0xFF */
218
219         dprintk(2,"key %02x\n", b);
220
221         if (b == 0xff)
222                 return 0;
223
224         if (b == 0xfe)
225                 /* keep old data */
226                 return 1;
227
228         *protocol = RC_TYPE_UNKNOWN;
229         *scancode = b;
230         *toggle = 0;
231         return 1;
232 }
233
234 static int get_key_avermedia_cardbus(struct IR_i2c *ir, enum rc_type *protocol,
235                                      u32 *scancode, u8 *toggle)
236 {
237         unsigned char subaddr, key, keygroup;
238         struct i2c_msg msg[] = { { .addr = ir->c->addr, .flags = 0,
239                                    .buf = &subaddr, .len = 1},
240                                  { .addr = ir->c->addr, .flags = I2C_M_RD,
241                                   .buf = &key, .len = 1} };
242         subaddr = 0x0d;
243         if (2 != i2c_transfer(ir->c->adapter, msg, 2)) {
244                 dprintk(1, "read error\n");
245                 return -EIO;
246         }
247
248         if (key == 0xff)
249                 return 0;
250
251         subaddr = 0x0b;
252         msg[1].buf = &keygroup;
253         if (2 != i2c_transfer(ir->c->adapter, msg, 2)) {
254                 dprintk(1, "read error\n");
255                 return -EIO;
256         }
257
258         if (keygroup == 0xff)
259                 return 0;
260
261         dprintk(1, "read key 0x%02x/0x%02x\n", key, keygroup);
262         if (keygroup < 2 || keygroup > 4) {
263                 /* Only a warning */
264                 dprintk(1, "warning: invalid key group 0x%02x for key 0x%02x\n",
265                                                                 keygroup, key);
266         }
267         key |= (keygroup & 1) << 6;
268
269         *protocol = RC_TYPE_UNKNOWN;
270         *scancode = key;
271         if (ir->c->addr == 0x41) /* AVerMedia EM78P153 */
272                 *scancode |= keygroup << 8;
273         *toggle = 0;
274         return 1;
275 }
276
277 /* ----------------------------------------------------------------------- */
278
279 static int ir_key_poll(struct IR_i2c *ir)
280 {
281         enum rc_type protocol;
282         u32 scancode;
283         u8 toggle;
284         int rc;
285
286         dprintk(3, "%s\n", __func__);
287         rc = ir->get_key(ir, &protocol, &scancode, &toggle);
288         if (rc < 0) {
289                 dprintk(2,"error\n");
290                 return rc;
291         }
292
293         if (rc) {
294                 dprintk(1, "%s: proto = 0x%04x, scancode = 0x%08x\n",
295                         __func__, protocol, scancode);
296                 rc_keydown(ir->rc, protocol, scancode, toggle);
297         }
298         return 0;
299 }
300
301 static void ir_work(struct work_struct *work)
302 {
303         int rc;
304         struct IR_i2c *ir = container_of(work, struct IR_i2c, work.work);
305
306         rc = ir_key_poll(ir);
307         if (rc == -ENODEV) {
308                 rc_unregister_device(ir->rc);
309                 ir->rc = NULL;
310                 return;
311         }
312
313         schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling_interval));
314 }
315
316 /* ----------------------------------------------------------------------- */
317
318 static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id)
319 {
320         char *ir_codes = NULL;
321         const char *name = NULL;
322         u64 rc_type = RC_BIT_UNKNOWN;
323         struct IR_i2c *ir;
324         struct rc_dev *rc = NULL;
325         struct i2c_adapter *adap = client->adapter;
326         unsigned short addr = client->addr;
327         int err;
328
329         ir = devm_kzalloc(&client->dev, sizeof(*ir), GFP_KERNEL);
330         if (!ir)
331                 return -ENOMEM;
332
333         ir->c = client;
334         ir->polling_interval = DEFAULT_POLLING_INTERVAL;
335         i2c_set_clientdata(client, ir);
336
337         switch(addr) {
338         case 0x64:
339                 name        = "Pixelview";
340                 ir->get_key = get_key_pixelview;
341                 rc_type     = RC_BIT_OTHER;
342                 ir_codes    = RC_MAP_EMPTY;
343                 break;
344         case 0x18:
345         case 0x1f:
346         case 0x1a:
347                 name        = "Hauppauge";
348                 ir->get_key = get_key_haup;
349                 rc_type     = RC_BIT_RC5;
350                 ir_codes    = RC_MAP_HAUPPAUGE;
351                 break;
352         case 0x30:
353                 name        = "KNC One";
354                 ir->get_key = get_key_knc1;
355                 rc_type     = RC_BIT_OTHER;
356                 ir_codes    = RC_MAP_EMPTY;
357                 break;
358         case 0x6b:
359                 name        = "FusionHDTV";
360                 ir->get_key = get_key_fusionhdtv;
361                 rc_type     = RC_BIT_UNKNOWN;
362                 ir_codes    = RC_MAP_FUSIONHDTV_MCE;
363                 break;
364         case 0x40:
365                 name        = "AVerMedia Cardbus remote";
366                 ir->get_key = get_key_avermedia_cardbus;
367                 rc_type     = RC_BIT_OTHER;
368                 ir_codes    = RC_MAP_AVERMEDIA_CARDBUS;
369                 break;
370         case 0x41:
371                 name        = "AVerMedia EM78P153";
372                 ir->get_key = get_key_avermedia_cardbus;
373                 rc_type     = RC_BIT_OTHER;
374                 /* RM-KV remote, seems to be same as RM-K6 */
375                 ir_codes    = RC_MAP_AVERMEDIA_M733A_RM_K6;
376                 break;
377         case 0x71:
378                 name        = "Hauppauge/Zilog Z8";
379                 ir->get_key = get_key_haup_xvr;
380                 rc_type     = RC_BIT_RC5 | RC_BIT_RC6_MCE | RC_BIT_RC6_6A_32;
381                 ir_codes    = RC_MAP_HAUPPAUGE;
382                 break;
383         }
384
385         /* Let the caller override settings */
386         if (client->dev.platform_data) {
387                 const struct IR_i2c_init_data *init_data =
388                                                 client->dev.platform_data;
389
390                 ir_codes = init_data->ir_codes;
391                 rc = init_data->rc_dev;
392
393                 name = init_data->name;
394                 if (init_data->type)
395                         rc_type = init_data->type;
396
397                 if (init_data->polling_interval)
398                         ir->polling_interval = init_data->polling_interval;
399
400                 switch (init_data->internal_get_key_func) {
401                 case IR_KBD_GET_KEY_CUSTOM:
402                         /* The bridge driver provided us its own function */
403                         ir->get_key = init_data->get_key;
404                         break;
405                 case IR_KBD_GET_KEY_PIXELVIEW:
406                         ir->get_key = get_key_pixelview;
407                         break;
408                 case IR_KBD_GET_KEY_HAUP:
409                         ir->get_key = get_key_haup;
410                         break;
411                 case IR_KBD_GET_KEY_KNC1:
412                         ir->get_key = get_key_knc1;
413                         break;
414                 case IR_KBD_GET_KEY_FUSIONHDTV:
415                         ir->get_key = get_key_fusionhdtv;
416                         break;
417                 case IR_KBD_GET_KEY_HAUP_XVR:
418                         ir->get_key = get_key_haup_xvr;
419                         break;
420                 case IR_KBD_GET_KEY_AVERMEDIA_CARDBUS:
421                         ir->get_key = get_key_avermedia_cardbus;
422                         break;
423                 }
424         }
425
426         if (!rc) {
427                 /*
428                  * If platform_data doesn't specify rc_dev, initialize it
429                  * internally
430                  */
431                 rc = rc_allocate_device();
432                 if (!rc)
433                         return -ENOMEM;
434         }
435         ir->rc = rc;
436
437         /* Make sure we are all setup before going on */
438         if (!name || !ir->get_key || !rc_type || !ir_codes) {
439                 dprintk(1, ": Unsupported device at address 0x%02x\n",
440                         addr);
441                 err = -ENODEV;
442                 goto err_out_free;
443         }
444
445         /* Sets name */
446         snprintf(ir->name, sizeof(ir->name), "i2c IR (%s)", name);
447         ir->ir_codes = ir_codes;
448
449         snprintf(ir->phys, sizeof(ir->phys), "%s/%s/ir0",
450                  dev_name(&adap->dev),
451                  dev_name(&client->dev));
452
453         /*
454          * Initialize input_dev fields
455          * It doesn't make sense to allow overriding them via platform_data
456          */
457         rc->input_id.bustype = BUS_I2C;
458         rc->input_phys       = ir->phys;
459         rc->input_name       = ir->name;
460
461         /*
462          * Initialize the other fields of rc_dev
463          */
464         rc->map_name       = ir->ir_codes;
465         rc->allowed_protocols = rc_type;
466         rc->enabled_protocols = rc_type;
467         if (!rc->driver_name)
468                 rc->driver_name = MODULE_NAME;
469
470         err = rc_register_device(rc);
471         if (err)
472                 goto err_out_free;
473
474         printk(MODULE_NAME ": %s detected at %s [%s]\n",
475                ir->name, ir->phys, adap->name);
476
477         /* start polling via eventd */
478         INIT_DELAYED_WORK(&ir->work, ir_work);
479         schedule_delayed_work(&ir->work, 0);
480
481         return 0;
482
483  err_out_free:
484         /* Only frees rc if it were allocated internally */
485         rc_free_device(rc);
486         return err;
487 }
488
489 static int ir_remove(struct i2c_client *client)
490 {
491         struct IR_i2c *ir = i2c_get_clientdata(client);
492
493         /* kill outstanding polls */
494         cancel_delayed_work_sync(&ir->work);
495
496         /* unregister device */
497         rc_unregister_device(ir->rc);
498
499         /* free memory */
500         return 0;
501 }
502
503 static const struct i2c_device_id ir_kbd_id[] = {
504         /* Generic entry for any IR receiver */
505         { "ir_video", 0 },
506         /* IR device specific entries should be added here */
507         { "ir_rx_z8f0811_haup", 0 },
508         { "ir_rx_z8f0811_hdpvr", 0 },
509         { }
510 };
511
512 static struct i2c_driver ir_kbd_driver = {
513         .driver = {
514                 .name   = "ir-kbd-i2c",
515         },
516         .probe          = ir_probe,
517         .remove         = ir_remove,
518         .id_table       = ir_kbd_id,
519 };
520
521 module_i2c_driver(ir_kbd_driver);
522
523 /* ----------------------------------------------------------------------- */
524
525 MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, Ulrich Mueller");
526 MODULE_DESCRIPTION("input driver for i2c IR remote controls");
527 MODULE_LICENSE("GPL");