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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 | ir_codes = ir_codes_pixelview; | |
332 | ir->mask_keycode = 0x001F00; | |
333 | ir->mask_keyup = 0x006000; | |
334 | ir->polling = 50; // ms | |
335 | break; | |
336 | case BTTV_BOARD_NEBULA_DIGITV: | |
337 | ir_codes = ir_codes_nebula; | |
338 | btv->custom_irq = bttv_rc5_irq; | |
339 | ir->rc5_gpio = 1; | |
340 | break; | |
341 | case BTTV_BOARD_MACHTV_MAGICTV: | |
342 | ir_codes = ir_codes_apac_viewcomp; | |
343 | ir->mask_keycode = 0x001F00; | |
344 | ir->mask_keyup = 0x004000; | |
345 | ir->polling = 50; /* ms */ | |
346 | break; | |
347 | } | |
348 | if (NULL == ir_codes) { | |
349 | dprintk(KERN_INFO "Ooops: IR config error [card=%d]\n",btv->c.type); | |
350 | kfree(ir); | |
351 | input_free_device(input_dev); | |
352 | return -ENODEV; | |
353 | } | |
354 | ||
355 | if (ir->rc5_gpio) { | |
356 | u32 gpio; | |
357 | /* enable remote irq */ | |
358 | bttv_gpio_inout(&btv->c, (1 << 4), 1 << 4); | |
359 | gpio = bttv_gpio_read(&btv->c); | |
360 | bttv_gpio_write(&btv->c, gpio & ~(1 << 4)); | |
361 | bttv_gpio_write(&btv->c, gpio | (1 << 4)); | |
362 | } else { | |
363 | /* init hardware-specific stuff */ | |
364 | bttv_gpio_inout(&btv->c, ir->mask_keycode | ir->mask_keydown, 0); | |
365 | } | |
366 | ||
367 | /* init input device */ | |
368 | ir->dev = input_dev; | |
369 | ||
370 | snprintf(ir->name, sizeof(ir->name), "bttv IR (card=%d)", | |
371 | btv->c.type); | |
372 | snprintf(ir->phys, sizeof(ir->phys), "pci-%s/ir0", | |
373 | pci_name(btv->c.pci)); | |
374 | ||
375 | ir_input_init(input_dev, &ir->ir, ir_type, ir_codes); | |
376 | input_dev->name = ir->name; | |
377 | input_dev->phys = ir->phys; | |
378 | input_dev->id.bustype = BUS_PCI; | |
379 | input_dev->id.version = 1; | |
380 | if (btv->c.pci->subsystem_vendor) { | |
381 | input_dev->id.vendor = btv->c.pci->subsystem_vendor; | |
382 | input_dev->id.product = btv->c.pci->subsystem_device; | |
383 | } else { | |
384 | input_dev->id.vendor = btv->c.pci->vendor; | |
385 | input_dev->id.product = btv->c.pci->device; | |
386 | } | |
387 | input_dev->cdev.dev = &btv->c.pci->dev; | |
388 | ||
389 | btv->remote = ir; | |
390 | if (ir->polling) { | |
391 | init_timer(&ir->timer); | |
392 | ir->timer.function = bttv_input_timer; | |
393 | ir->timer.data = (unsigned long)btv; | |
394 | ir->timer.expires = jiffies + HZ; | |
395 | add_timer(&ir->timer); | |
396 | } else if (ir->rc5_gpio) { | |
397 | /* set timer_end for code completion */ | |
398 | init_timer(&ir->timer_end); | |
399 | ir->timer_end.function = bttv_rc5_timer_end; | |
400 | ir->timer_end.data = (unsigned long)ir; | |
401 | ||
402 | init_timer(&ir->timer_keyup); | |
403 | ir->timer_keyup.function = bttv_rc5_timer_keyup; | |
404 | ir->timer_keyup.data = (unsigned long)ir; | |
405 | } | |
406 | ||
407 | /* all done */ | |
408 | input_register_device(btv->remote->dev); | |
409 | printk(DEVNAME ": %s detected at %s\n",ir->name,ir->phys); | |
410 | ||
411 | /* the remote isn't as bouncy as a keyboard */ | |
412 | ir->dev->rep[REP_DELAY] = repeat_delay; | |
413 | ir->dev->rep[REP_PERIOD] = repeat_period; | |
414 | ||
415 | return 0; | |
416 | } | |
417 | ||
418 | void bttv_input_fini(struct bttv *btv) | |
419 | { | |
420 | if (btv->remote == NULL) | |
421 | return; | |
422 | ||
423 | if (btv->remote->polling) { | |
424 | del_timer_sync(&btv->remote->timer); | |
425 | flush_scheduled_work(); | |
426 | } | |
427 | ||
428 | ||
429 | if (btv->remote->rc5_gpio) { | |
430 | u32 gpio; | |
431 | ||
432 | del_timer_sync(&btv->remote->timer_end); | |
433 | flush_scheduled_work(); | |
434 | ||
435 | gpio = bttv_gpio_read(&btv->c); | |
436 | bttv_gpio_write(&btv->c, gpio & ~(1 << 4)); | |
437 | } | |
438 | ||
439 | input_unregister_device(btv->remote->dev); | |
440 | kfree(btv->remote); | |
441 | btv->remote = NULL; | |
442 | } | |
443 | ||
444 | ||
445 | /* | |
446 | * Local variables: | |
447 | * c-basic-offset: 8 | |
448 | * End: | |
449 | */ |