1 /*
2 *
3 * Copyright (c) 2003 Gerd Knorr
4 * Copyright (c) 2003 Pavel Machek
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21 #include <linux/module.h>
22 #include <linux/moduleparam.h>
23 #include <linux/init.h>
24 #include <linux/delay.h>
25 #include <linux/interrupt.h>
26 #include <linux/input.h>
27
28 #include "bttv.h"
29 #include "bttvp.h"
30
31
32 static int debug;
33 module_param(debug, int, 0644); /* debug level (0,1,2) */
34 static int repeat_delay = 500;
35 module_param(repeat_delay, int, 0644);
36 static int repeat_period = 33;
37 module_param(repeat_period, int, 0644);
38
39 #define DEVNAME "bttv-input"
40
41 /* ---------------------------------------------------------------------- */
42
43 static void ir_handle_key(struct bttv *btv)
44 {
45 struct bttv_ir *ir = btv->remote;
46 u32 gpio,data;
47
48 /* read gpio value */
49 gpio = bttv_gpio_read(&btv->c);
50 if (ir->polling) {
51 if (ir->last_gpio == gpio)
52 return;
53 ir->last_gpio = gpio;
54 }
55
56 /* extract data */
57 data = ir_extract_bits(gpio, ir->mask_keycode);
58 dprintk(KERN_INFO DEVNAME ": irq gpio=0x%x code=%d | %s%s%s\n",
59 gpio, data,
60 ir->polling ? "poll" : "irq",
61 (gpio & ir->mask_keydown) ? " down" : "",
62 (gpio & ir->mask_keyup) ? " up" : "");
63
64 if ((ir->mask_keydown && (0 != (gpio & ir->mask_keydown))) ||
65 (ir->mask_keyup && (0 == (gpio & ir->mask_keyup)))) {
66 ir_input_keydown(ir->dev,&ir->ir,data,data);
67 } else {
68 ir_input_nokey(ir->dev,&ir->ir);
69 }
70
71 }
72
73 void bttv_input_irq(struct bttv *btv)
74 {
75 struct bttv_ir *ir = btv->remote;
76
77 if (!ir->polling)
78 ir_handle_key(btv);
79 }
80
81 static void bttv_input_timer(unsigned long data)
82 {
83 struct bttv *btv = (struct bttv*)data;
84 struct bttv_ir *ir = btv->remote;
85 unsigned long timeout;
86
87 ir_handle_key(btv);
88 timeout = jiffies + (ir->polling * HZ / 1000);
89 mod_timer(&ir->timer, timeout);
90 }
91
92 /* ---------------------------------------------------------------*/
93
94 static int rc5_remote_gap = 885;
95 module_param(rc5_remote_gap, int, 0644);
96 static int rc5_key_timeout = 200;
97 module_param(rc5_key_timeout, int, 0644);
98
99 #define RC5_START(x) (((x)>>12)&3)
100 #define RC5_TOGGLE(x) (((x)>>11)&1)
101 #define RC5_ADDR(x) (((x)>>6)&31)
102 #define RC5_INSTR(x) ((x)&63)
103
104 /* decode raw bit pattern to RC5 code */
105 static u32 rc5_decode(unsigned int code)
106 {
107 unsigned int org_code = code;
108 unsigned int pair;
109 unsigned int rc5 = 0;
110 int i;
111
112 code = (code << 1) | 1;
113 for (i = 0; i < 14; ++i) {
114 pair = code & 0x3;
115 code >>= 2;
116
117 rc5 <<= 1;
118 switch (pair) {
119 case 0:
120 case 2:
121 break;
122 case 1:
123 rc5 |= 1;
124 break;
125 case 3:
126 dprintk(KERN_WARNING "bad code: %x\n", org_code);
127 return 0;
128 }
129 }
130 dprintk(KERN_WARNING "code=%x, rc5=%x, start=%x, toggle=%x, address=%x, "
131 "instr=%x\n", rc5, org_code, RC5_START(rc5),
132 RC5_TOGGLE(rc5), RC5_ADDR(rc5), RC5_INSTR(rc5));
133 return rc5;
134 }
135
136 static int bttv_rc5_irq(struct bttv *btv)
137 {
138 struct bttv_ir *ir = btv->remote;
139 struct timeval tv;
140 u32 gpio;
141 u32 gap;
142 unsigned long current_jiffies, timeout;
143
144 /* read gpio port */
145 gpio = bttv_gpio_read(&btv->c);
146
147 /* remote IRQ? */
148 if (!(gpio & 0x20))
149 return 0;
150
151 /* get time of bit */
152 current_jiffies = jiffies;
153 do_gettimeofday(&tv);
154
155 /* avoid overflow with gap >1s */
156 if (tv.tv_sec - ir->base_time.tv_sec > 1) {
157 gap = 200000;
158 } else {
159 gap = 1000000 * (tv.tv_sec - ir->base_time.tv_sec) +
160 tv.tv_usec - ir->base_time.tv_usec;
161 }
162
163 /* active code => add bit */
164 if (ir->active) {
165 /* only if in the code (otherwise spurious IRQ or timer
166 late) */
167 if (ir->last_bit < 28) {
168 ir->last_bit = (gap - rc5_remote_gap / 2) /
169 rc5_remote_gap;
170 ir->code |= 1 << ir->last_bit;
171 }
172 /* starting new code */
173 } else {
174 ir->active = 1;
175 ir->code = 0;
176 ir->base_time = tv;
177 ir->last_bit = 0;
178
179 timeout = current_jiffies + (500 + 30 * HZ) / 1000;
180 mod_timer(&ir->timer_end, timeout);
181 }
182
183 /* toggle GPIO pin 4 to reset the irq */
184 bttv_gpio_write(&btv->c, gpio & ~(1 << 4));
185 bttv_gpio_write(&btv->c, gpio | (1 << 4));
186 return 1;
187 }
188
189
190 static void bttv_rc5_timer_end(unsigned long data)
191 {
192 struct bttv_ir *ir = (struct bttv_ir *)data;
193 struct timeval tv;
194 unsigned long current_jiffies, timeout;
195 u32 gap;
196
197 /* get time */
198 current_jiffies = jiffies;
199 do_gettimeofday(&tv);
200
201 /* avoid overflow with gap >1s */
202 if (tv.tv_sec - ir->base_time.tv_sec > 1) {
203 gap = 200000;
204 } else {
205 gap = 1000000 * (tv.tv_sec - ir->base_time.tv_sec) +
206 tv.tv_usec - ir->base_time.tv_usec;
207 }
208
209 /* Allow some timmer jitter (RC5 is ~24ms anyway so this is ok) */
210 if (gap < 28000) {
211 dprintk(KERN_WARNING "spurious timer_end\n");
212 return;
213 }
214
215 ir->active = 0;
216 if (ir->last_bit < 20) {
217 /* ignore spurious codes (caused by light/other remotes) */
218 dprintk(KERN_WARNING "short code: %x\n", ir->code);
219 } else {
220 u32 rc5 = rc5_decode(ir->code);
221
222 /* two start bits? */
223 if (RC5_START(rc5) != 3) {
224 dprintk(KERN_WARNING "rc5 start bits invalid: %u\n", RC5_START(rc5));
225
226 /* right address? */
227 } else if (RC5_ADDR(rc5) == 0x0) {
228 u32 toggle = RC5_TOGGLE(rc5);
229 u32 instr = RC5_INSTR(rc5);
230
231 /* Good code, decide if repeat/repress */
232 if (toggle != RC5_TOGGLE(ir->last_rc5) ||
233 instr != RC5_INSTR(ir->last_rc5)) {
234 dprintk(KERN_WARNING "instruction %x, toggle %x\n", instr,
235 toggle);
236 ir_input_nokey(ir->dev, &ir->ir);
237 ir_input_keydown(ir->dev, &ir->ir, instr,
238 instr);
239 }
240
241 /* Set/reset key-up timer */
242 timeout = current_jiffies + (500 + rc5_key_timeout
243 * HZ) / 1000;
244 mod_timer(&ir->timer_keyup, timeout);
245
246 /* Save code for repeat test */
247 ir->last_rc5 = rc5;
248 }
249 }
250 }
251
252 static void bttv_rc5_timer_keyup(unsigned long data)
253 {
254 struct bttv_ir *ir = (struct bttv_ir *)data;
255
256 dprintk(KERN_DEBUG "key released\n");
257 ir_input_nokey(ir->dev, &ir->ir);
258 }
259
260 /* ---------------------------------------------------------------------- */
261
262 int bttv_input_init(struct bttv *btv)
263 {
264 struct bttv_ir *ir;
265 IR_KEYTAB_TYPE *ir_codes = NULL;
266 struct input_dev *input_dev;
267 int ir_type = IR_TYPE_OTHER;
268
269 if (!btv->has_remote)
270 return -ENODEV;
271
272 ir = kzalloc(sizeof(*ir),GFP_KERNEL);
273 input_dev = input_allocate_device();
274 if (!ir || !input_dev) {
275 kfree(ir);
276 input_free_device(input_dev);
277 return -ENOMEM;
278 }
279 memset(ir,0,sizeof(*ir));
280
281 /* detect & configure */
282 switch (btv->c.type) {
283 case BTTV_BOARD_AVERMEDIA:
284 case BTTV_BOARD_AVPHONE98:
285 case BTTV_BOARD_AVERMEDIA98:
286 ir_codes = ir_codes_avermedia;
287 ir->mask_keycode = 0xf88000;
288 ir->mask_keydown = 0x010000;
289 ir->polling = 50; // ms
290 break;
291
292 case BTTV_BOARD_AVDVBT_761:
293 case BTTV_BOARD_AVDVBT_771:
294 ir_codes = ir_codes_avermedia_dvbt;
295 ir->mask_keycode = 0x0f00c0;
296 ir->mask_keydown = 0x000020;
297 ir->polling = 50; // ms
298 break;
299
300 case BTTV_BOARD_PXELVWPLTVPAK:
301 ir_codes = ir_codes_pixelview;
302 ir->mask_keycode = 0x003e00;
303 ir->mask_keyup = 0x010000;
304 ir->polling = 50; // ms
305 break;
306 case BTTV_BOARD_PV_BT878P_9B:
307 case BTTV_BOARD_PV_BT878P_PLUS:
308 ir_codes = ir_codes_pixelview;
309 ir->mask_keycode = 0x001f00;
310 ir->mask_keyup = 0x008000;
311 ir->polling = 50; // ms
312 break;
313
314 case BTTV_BOARD_WINFAST2000:
315 ir_codes = ir_codes_winfast;
316 ir->mask_keycode = 0x1f8;
317 break;
318 case BTTV_BOARD_MAGICTVIEW061:
319 case BTTV_BOARD_MAGICTVIEW063:
320 ir_codes = ir_codes_winfast;
321 ir->mask_keycode = 0x0008e000;
322 ir->mask_keydown = 0x00200000;
323 break;
324 case BTTV_BOARD_APAC_VIEWCOMP:
325 ir_codes = ir_codes_apac_viewcomp;
326 ir->mask_keycode = 0x001f00;
327 ir->mask_keyup = 0x008000;
328 ir->polling = 50; // ms
329 break;
330 case BTTV_BOARD_CONCEPTRONIC_CTVFMI2:
331 case BTTV_BOARD_CONTVFMI:
332 ir_codes = ir_codes_pixelview;
333 ir->mask_keycode = 0x001F00;
334 ir->mask_keyup = 0x006000;
335 ir->polling = 50; // ms
336 break;
337 case BTTV_BOARD_NEBULA_DIGITV:
338 ir_codes = ir_codes_nebula;
339 btv->custom_irq = bttv_rc5_irq;
340 ir->rc5_gpio = 1;
341 break;
342 case BTTV_BOARD_MACHTV_MAGICTV:
343 ir_codes = ir_codes_apac_viewcomp;
344 ir->mask_keycode = 0x001F00;
345 ir->mask_keyup = 0x004000;
346 ir->polling = 50; /* ms */
347 break;
348 }
349 if (NULL == ir_codes) {
350 dprintk(KERN_INFO "Ooops: IR config error [card=%d]\n",btv->c.type);
351 kfree(ir);
352 input_free_device(input_dev);
353 return -ENODEV;
354 }
355
356 if (ir->rc5_gpio) {
357 u32 gpio;
358 /* enable remote irq */
359 bttv_gpio_inout(&btv->c, (1 << 4), 1 << 4);
360 gpio = bttv_gpio_read(&btv->c);
361 bttv_gpio_write(&btv->c, gpio & ~(1 << 4));
362 bttv_gpio_write(&btv->c, gpio | (1 << 4));
363 } else {
364 /* init hardware-specific stuff */
365 bttv_gpio_inout(&btv->c, ir->mask_keycode | ir->mask_keydown, 0);
366 }
367
368 /* init input device */
369 ir->dev = input_dev;
370
371 snprintf(ir->name, sizeof(ir->name), "bttv IR (card=%d)",
372 btv->c.type);
373 snprintf(ir->phys, sizeof(ir->phys), "pci-%s/ir0",
374 pci_name(btv->c.pci));
375
376 ir_input_init(input_dev, &ir->ir, ir_type, ir_codes);
377 input_dev->name = ir->name;
378 input_dev->phys = ir->phys;
379 input_dev->id.bustype = BUS_PCI;
380 input_dev->id.version = 1;
381 if (btv->c.pci->subsystem_vendor) {
382 input_dev->id.vendor = btv->c.pci->subsystem_vendor;
383 input_dev->id.product = btv->c.pci->subsystem_device;
384 } else {
385 input_dev->id.vendor = btv->c.pci->vendor;
386 input_dev->id.product = btv->c.pci->device;
387 }
388 input_dev->cdev.dev = &btv->c.pci->dev;
389
390 btv->remote = ir;
391 if (ir->polling) {
392 init_timer(&ir->timer);
393 ir->timer.function = bttv_input_timer;
394 ir->timer.data = (unsigned long)btv;
395 ir->timer.expires = jiffies + HZ;
396 add_timer(&ir->timer);
397 } else if (ir->rc5_gpio) {
398 /* set timer_end for code completion */
399 init_timer(&ir->timer_end);
400 ir->timer_end.function = bttv_rc5_timer_end;
401 ir->timer_end.data = (unsigned long)ir;
402
403 init_timer(&ir->timer_keyup);
404 ir->timer_keyup.function = bttv_rc5_timer_keyup;
405 ir->timer_keyup.data = (unsigned long)ir;
406 }
407
408 /* all done */
409 input_register_device(btv->remote->dev);
410 printk(DEVNAME ": %s detected at %s\n",ir->name,ir->phys);
411
412 /* the remote isn't as bouncy as a keyboard */
413 ir->dev->rep[REP_DELAY] = repeat_delay;
414 ir->dev->rep[REP_PERIOD] = repeat_period;
415
416 return 0;
417 }
418
419 void bttv_input_fini(struct bttv *btv)
420 {
421 if (btv->remote == NULL)
422 return;
423
424 if (btv->remote->polling) {
425 del_timer_sync(&btv->remote->timer);
426 flush_scheduled_work();
427 }
428
429
430 if (btv->remote->rc5_gpio) {
431 u32 gpio;
432
433 del_timer_sync(&btv->remote->timer_end);
434 flush_scheduled_work();
435
436 gpio = bttv_gpio_read(&btv->c);
437 bttv_gpio_write(&btv->c, gpio & ~(1 << 4));
438 }
439
440 input_unregister_device(btv->remote->dev);
441 kfree(btv->remote);
442 btv->remote = NULL;
443 }
444
445
446 /*
447 * Local variables:
448 * c-basic-offset: 8
449 * End:
450 */
451
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