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Commit | Line | Data |
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d5e52653 | 1 | /* |
f7abcd38 MCC |
2 | handle em28xx IR remotes via linux kernel input layer. |
3 | ||
4 | Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it> | |
5 | Markus Rechberger <mrechberger@gmail.com> | |
2e7c6dc3 | 6 | Mauro Carvalho Chehab <mchehab@infradead.org> |
f7abcd38 MCC |
7 | Sascha Sommer <saschasommer@freenet.de> |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
d5e52653 MCC |
22 | */ |
23 | ||
24 | #include <linux/module.h> | |
d5e52653 MCC |
25 | #include <linux/init.h> |
26 | #include <linux/delay.h> | |
d5e52653 MCC |
27 | #include <linux/interrupt.h> |
28 | #include <linux/input.h> | |
29 | #include <linux/usb.h> | |
5a0e3ad6 | 30 | #include <linux/slab.h> |
d5e52653 | 31 | |
f7abcd38 | 32 | #include "em28xx.h" |
d5e52653 | 33 | |
a9fc52bc DH |
34 | #define EM28XX_SNAPSHOT_KEY KEY_CAMERA |
35 | #define EM28XX_SBUTTON_QUERY_INTERVAL 500 | |
36 | #define EM28XX_R0C_USBSUSP_SNAPSHOT 0x20 | |
37 | ||
c8793b03 | 38 | static unsigned int ir_debug; |
d5e52653 | 39 | module_param(ir_debug, int, 0644); |
6ea54d93 | 40 | MODULE_PARM_DESC(ir_debug, "enable debug messages [IR]"); |
d5e52653 | 41 | |
727e625c MCC |
42 | #define MODULE_NAME "em28xx" |
43 | ||
a924a499 | 44 | #define i2cdprintk(fmt, arg...) \ |
6ea54d93 | 45 | if (ir_debug) { \ |
1df8e986 | 46 | printk(KERN_DEBUG "%s/ir: " fmt, ir->name , ## arg); \ |
6ea54d93 | 47 | } |
d5e52653 | 48 | |
a924a499 MCC |
49 | #define dprintk(fmt, arg...) \ |
50 | if (ir_debug) { \ | |
51 | printk(KERN_DEBUG "%s/ir: " fmt, ir->name , ## arg); \ | |
52 | } | |
53 | ||
54 | /********************************************************** | |
55 | Polling structure used by em28xx IR's | |
56 | **********************************************************/ | |
57 | ||
4b92253a DH |
58 | struct em28xx_ir_poll_result { |
59 | unsigned int toggle_bit:1; | |
60 | unsigned int read_count:7; | |
61 | u8 rc_address; | |
62 | u8 rc_data[4]; /* 1 byte on em2860/2880, 4 on em2874 */ | |
63 | }; | |
64 | ||
a924a499 MCC |
65 | struct em28xx_IR { |
66 | struct em28xx *dev; | |
67 | struct input_dev *input; | |
68 | struct ir_input_state ir; | |
69 | char name[32]; | |
70 | char phys[32]; | |
71 | ||
72 | /* poll external decoder */ | |
73 | int polling; | |
f263bac9 | 74 | struct delayed_work work; |
4b92253a | 75 | unsigned int last_toggle:1; |
0278155c | 76 | unsigned int full_code:1; |
4b92253a DH |
77 | unsigned int last_readcount; |
78 | unsigned int repeat_interval; | |
a924a499 | 79 | |
4b92253a | 80 | int (*get_key)(struct em28xx_IR *, struct em28xx_ir_poll_result *); |
950b0f5a MCC |
81 | |
82 | /* IR device properties */ | |
83 | ||
84 | struct ir_dev_props props; | |
a924a499 MCC |
85 | }; |
86 | ||
87 | /********************************************************** | |
88 | I2C IR based get keycodes - should be used with ir-kbd-i2c | |
89 | **********************************************************/ | |
d5e52653 | 90 | |
c8793b03 | 91 | int em28xx_get_key_terratec(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw) |
e43f14af MR |
92 | { |
93 | unsigned char b; | |
94 | ||
95 | /* poll IR chip */ | |
c668f32d | 96 | if (1 != i2c_master_recv(ir->c, &b, 1)) { |
a924a499 | 97 | i2cdprintk("read error\n"); |
e43f14af MR |
98 | return -EIO; |
99 | } | |
100 | ||
101 | /* it seems that 0xFE indicates that a button is still hold | |
4f9c05aa MCC |
102 | down, while 0xff indicates that no button is hold |
103 | down. 0xfe sequences are sometimes interrupted by 0xFF */ | |
e43f14af | 104 | |
a924a499 | 105 | i2cdprintk("key %02x\n", b); |
e43f14af | 106 | |
4f9c05aa | 107 | if (b == 0xff) |
e43f14af MR |
108 | return 0; |
109 | ||
4f9c05aa | 110 | if (b == 0xfe) |
e43f14af MR |
111 | /* keep old data */ |
112 | return 1; | |
113 | ||
114 | *ir_key = b; | |
115 | *ir_raw = b; | |
116 | return 1; | |
117 | } | |
118 | ||
c8793b03 | 119 | int em28xx_get_key_em_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw) |
d5e52653 MCC |
120 | { |
121 | unsigned char buf[2]; | |
b779974b MCC |
122 | u16 code; |
123 | int size; | |
d5e52653 MCC |
124 | |
125 | /* poll IR chip */ | |
b779974b MCC |
126 | size = i2c_master_recv(ir->c, buf, sizeof(buf)); |
127 | ||
128 | if (size != 2) | |
d5e52653 MCC |
129 | return -EIO; |
130 | ||
131 | /* Does eliminate repeated parity code */ | |
6ea54d93 | 132 | if (buf[1] == 0xff) |
d5e52653 MCC |
133 | return 0; |
134 | ||
6ea54d93 | 135 | ir->old = buf[1]; |
d5e52653 | 136 | |
b779974b MCC |
137 | /* |
138 | * Rearranges bits to the right order. | |
139 | * The bit order were determined experimentally by using | |
140 | * The original Hauppauge Grey IR and another RC5 that uses addr=0x08 | |
141 | * The RC5 code has 14 bits, but we've experimentally determined | |
142 | * the meaning for only 11 bits. | |
143 | * So, the code translation is not complete. Yet, it is enough to | |
144 | * work with the provided RC5 IR. | |
145 | */ | |
146 | code = | |
147 | ((buf[0] & 0x01) ? 0x0020 : 0) | /* 0010 0000 */ | |
148 | ((buf[0] & 0x02) ? 0x0010 : 0) | /* 0001 0000 */ | |
149 | ((buf[0] & 0x04) ? 0x0008 : 0) | /* 0000 1000 */ | |
150 | ((buf[0] & 0x08) ? 0x0004 : 0) | /* 0000 0100 */ | |
151 | ((buf[0] & 0x10) ? 0x0002 : 0) | /* 0000 0010 */ | |
152 | ((buf[0] & 0x20) ? 0x0001 : 0) | /* 0000 0001 */ | |
153 | ((buf[1] & 0x08) ? 0x1000 : 0) | /* 0001 0000 */ | |
154 | ((buf[1] & 0x10) ? 0x0800 : 0) | /* 0000 1000 */ | |
155 | ((buf[1] & 0x20) ? 0x0400 : 0) | /* 0000 0100 */ | |
156 | ((buf[1] & 0x40) ? 0x0200 : 0) | /* 0000 0010 */ | |
157 | ((buf[1] & 0x80) ? 0x0100 : 0); /* 0000 0001 */ | |
158 | ||
159 | i2cdprintk("ir hauppauge (em2840): code=0x%02x (rcv=0x%02x%02x)\n", | |
160 | code, buf[1], buf[0]); | |
d5e52653 MCC |
161 | |
162 | /* return key */ | |
163 | *ir_key = code; | |
164 | *ir_raw = code; | |
165 | return 1; | |
166 | } | |
167 | ||
c8793b03 MCC |
168 | int em28xx_get_key_pinnacle_usb_grey(struct IR_i2c *ir, u32 *ir_key, |
169 | u32 *ir_raw) | |
366cc64b MR |
170 | { |
171 | unsigned char buf[3]; | |
172 | ||
173 | /* poll IR chip */ | |
174 | ||
c668f32d | 175 | if (3 != i2c_master_recv(ir->c, buf, 3)) { |
a924a499 | 176 | i2cdprintk("read error\n"); |
366cc64b MR |
177 | return -EIO; |
178 | } | |
179 | ||
a924a499 | 180 | i2cdprintk("key %02x\n", buf[2]&0x3f); |
6ea54d93 | 181 | if (buf[0] != 0x00) |
366cc64b | 182 | return 0; |
366cc64b MR |
183 | |
184 | *ir_key = buf[2]&0x3f; | |
185 | *ir_raw = buf[2]&0x3f; | |
186 | ||
187 | return 1; | |
188 | } | |
189 | ||
ca39d84d MA |
190 | int em28xx_get_key_winfast_usbii_deluxe(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw) |
191 | { | |
192 | unsigned char subaddr, keydetect, key; | |
193 | ||
194 | struct i2c_msg msg[] = { { .addr = ir->c->addr, .flags = 0, .buf = &subaddr, .len = 1}, | |
195 | ||
196 | { .addr = ir->c->addr, .flags = I2C_M_RD, .buf = &keydetect, .len = 1} }; | |
197 | ||
198 | subaddr = 0x10; | |
199 | if (2 != i2c_transfer(ir->c->adapter, msg, 2)) { | |
200 | i2cdprintk("read error\n"); | |
201 | return -EIO; | |
202 | } | |
203 | if (keydetect == 0x00) | |
204 | return 0; | |
205 | ||
206 | subaddr = 0x00; | |
207 | msg[1].buf = &key; | |
208 | if (2 != i2c_transfer(ir->c->adapter, msg, 2)) { | |
209 | i2cdprintk("read error\n"); | |
210 | return -EIO; | |
211 | } | |
212 | if (key == 0x00) | |
213 | return 0; | |
214 | ||
215 | *ir_key = key; | |
216 | *ir_raw = key; | |
217 | return 1; | |
218 | } | |
219 | ||
a924a499 MCC |
220 | /********************************************************** |
221 | Poll based get keycode functions | |
222 | **********************************************************/ | |
223 | ||
4b92253a DH |
224 | /* This is for the em2860/em2880 */ |
225 | static int default_polling_getkey(struct em28xx_IR *ir, | |
226 | struct em28xx_ir_poll_result *poll_result) | |
a924a499 MCC |
227 | { |
228 | struct em28xx *dev = ir->dev; | |
229 | int rc; | |
4b92253a | 230 | u8 msg[3] = { 0, 0, 0 }; |
a924a499 | 231 | |
0a6b8a85 MCC |
232 | /* Read key toggle, brand, and key code |
233 | on registers 0x45, 0x46 and 0x47 | |
234 | */ | |
a924a499 | 235 | rc = dev->em28xx_read_reg_req_len(dev, 0, EM28XX_R45_IR, |
0a6b8a85 | 236 | msg, sizeof(msg)); |
a924a499 MCC |
237 | if (rc < 0) |
238 | return rc; | |
239 | ||
4b92253a DH |
240 | /* Infrared toggle (Reg 0x45[7]) */ |
241 | poll_result->toggle_bit = (msg[0] >> 7); | |
242 | ||
243 | /* Infrared read count (Reg 0x45[6:0] */ | |
244 | poll_result->read_count = (msg[0] & 0x7f); | |
245 | ||
246 | /* Remote Control Address (Reg 0x46) */ | |
247 | poll_result->rc_address = msg[1]; | |
248 | ||
249 | /* Remote Control Data (Reg 0x47) */ | |
250 | poll_result->rc_data[0] = msg[2]; | |
251 | ||
252 | return 0; | |
253 | } | |
254 | ||
255 | static int em2874_polling_getkey(struct em28xx_IR *ir, | |
256 | struct em28xx_ir_poll_result *poll_result) | |
257 | { | |
258 | struct em28xx *dev = ir->dev; | |
259 | int rc; | |
260 | u8 msg[5] = { 0, 0, 0, 0, 0 }; | |
261 | ||
262 | /* Read key toggle, brand, and key code | |
263 | on registers 0x51-55 | |
264 | */ | |
265 | rc = dev->em28xx_read_reg_req_len(dev, 0, EM2874_R51_IR, | |
266 | msg, sizeof(msg)); | |
267 | if (rc < 0) | |
268 | return rc; | |
269 | ||
270 | /* Infrared toggle (Reg 0x51[7]) */ | |
271 | poll_result->toggle_bit = (msg[0] >> 7); | |
272 | ||
273 | /* Infrared read count (Reg 0x51[6:0] */ | |
274 | poll_result->read_count = (msg[0] & 0x7f); | |
275 | ||
276 | /* Remote Control Address (Reg 0x52) */ | |
277 | poll_result->rc_address = msg[1]; | |
278 | ||
279 | /* Remote Control Data (Reg 0x53-55) */ | |
280 | poll_result->rc_data[0] = msg[2]; | |
281 | poll_result->rc_data[1] = msg[3]; | |
282 | poll_result->rc_data[2] = msg[4]; | |
283 | ||
284 | return 0; | |
a924a499 MCC |
285 | } |
286 | ||
287 | /********************************************************** | |
288 | Polling code for em28xx | |
289 | **********************************************************/ | |
290 | ||
291 | static void em28xx_ir_handle_key(struct em28xx_IR *ir) | |
292 | { | |
4b92253a DH |
293 | int result; |
294 | int do_sendkey = 0; | |
295 | struct em28xx_ir_poll_result poll_result; | |
296 | ||
297 | /* read the registers containing the IR status */ | |
298 | result = ir->get_key(ir, &poll_result); | |
299 | if (result < 0) { | |
300 | dprintk("ir->get_key() failed %d\n", result); | |
a924a499 | 301 | return; |
4b92253a | 302 | } |
a924a499 | 303 | |
0278155c | 304 | dprintk("ir->get_key result tb=%02x rc=%02x lr=%02x data=%02x%02x\n", |
4b92253a | 305 | poll_result.toggle_bit, poll_result.read_count, |
0278155c MCC |
306 | ir->last_readcount, poll_result.rc_address, |
307 | poll_result.rc_data[0]); | |
4b92253a DH |
308 | |
309 | if (ir->dev->chip_id == CHIP_ID_EM2874) { | |
310 | /* The em2874 clears the readcount field every time the | |
311 | register is read. The em2860/2880 datasheet says that it | |
312 | is supposed to clear the readcount, but it doesn't. So with | |
313 | the em2874, we are looking for a non-zero read count as | |
314 | opposed to a readcount that is incrementing */ | |
315 | ir->last_readcount = 0; | |
316 | } | |
0a6b8a85 | 317 | |
4b92253a DH |
318 | if (poll_result.read_count == 0) { |
319 | /* The button has not been pressed since the last read */ | |
320 | } else if (ir->last_toggle != poll_result.toggle_bit) { | |
321 | /* A button has been pressed */ | |
322 | dprintk("button has been pressed\n"); | |
323 | ir->last_toggle = poll_result.toggle_bit; | |
324 | ir->repeat_interval = 0; | |
325 | do_sendkey = 1; | |
326 | } else if (poll_result.toggle_bit == ir->last_toggle && | |
327 | poll_result.read_count > 0 && | |
328 | poll_result.read_count != ir->last_readcount) { | |
329 | /* The button is still being held down */ | |
330 | dprintk("button being held down\n"); | |
331 | ||
332 | /* Debouncer for first keypress */ | |
333 | if (ir->repeat_interval++ > 9) { | |
334 | /* Start repeating after 1 second */ | |
335 | do_sendkey = 1; | |
0a6b8a85 | 336 | } |
4b92253a DH |
337 | } |
338 | ||
339 | if (do_sendkey) { | |
340 | dprintk("sending keypress\n"); | |
0278155c MCC |
341 | |
342 | if (ir->full_code) | |
343 | ir_input_keydown(ir->input, &ir->ir, | |
344 | poll_result.rc_address << 8 | | |
345 | poll_result.rc_data[0]); | |
346 | else | |
347 | ir_input_keydown(ir->input, &ir->ir, | |
348 | poll_result.rc_data[0]); | |
349 | ||
a924a499 MCC |
350 | ir_input_nokey(ir->input, &ir->ir); |
351 | } | |
4b92253a DH |
352 | |
353 | ir->last_readcount = poll_result.read_count; | |
354 | return; | |
a924a499 MCC |
355 | } |
356 | ||
a924a499 MCC |
357 | static void em28xx_ir_work(struct work_struct *work) |
358 | { | |
f263bac9 | 359 | struct em28xx_IR *ir = container_of(work, struct em28xx_IR, work.work); |
a924a499 MCC |
360 | |
361 | em28xx_ir_handle_key(ir); | |
f263bac9 | 362 | schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling)); |
a924a499 MCC |
363 | } |
364 | ||
26cdc76b | 365 | static void em28xx_ir_start(struct em28xx_IR *ir) |
a924a499 | 366 | { |
f263bac9 JD |
367 | INIT_DELAYED_WORK(&ir->work, em28xx_ir_work); |
368 | schedule_delayed_work(&ir->work, 0); | |
a924a499 MCC |
369 | } |
370 | ||
371 | static void em28xx_ir_stop(struct em28xx_IR *ir) | |
372 | { | |
f263bac9 | 373 | cancel_delayed_work_sync(&ir->work); |
a924a499 MCC |
374 | } |
375 | ||
971e8298 | 376 | int em28xx_ir_change_protocol(void *priv, u64 ir_type) |
a924a499 | 377 | { |
950b0f5a MCC |
378 | int rc = 0; |
379 | struct em28xx_IR *ir = priv; | |
380 | struct em28xx *dev = ir->dev; | |
381 | u8 ir_config = EM2874_IR_RC5; | |
1bad429e MCC |
382 | |
383 | /* Adjust xclk based o IR table for RC5/NEC tables */ | |
950b0f5a | 384 | |
3f831107 | 385 | dev->board.ir_codes->ir_type = IR_TYPE_OTHER; |
950b0f5a | 386 | if (ir_type == IR_TYPE_RC5) { |
1bad429e MCC |
387 | dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE; |
388 | ir->full_code = 1; | |
950b0f5a | 389 | } else if (ir_type == IR_TYPE_NEC) { |
1bad429e MCC |
390 | dev->board.xclk &= ~EM28XX_XCLK_IR_RC5_MODE; |
391 | ir_config = EM2874_IR_NEC; | |
392 | ir->full_code = 1; | |
950b0f5a MCC |
393 | } else |
394 | rc = -EINVAL; | |
395 | ||
3f831107 MCC |
396 | dev->board.ir_codes->ir_type = ir_type; |
397 | ||
1bad429e MCC |
398 | em28xx_write_reg_bits(dev, EM28XX_R0F_XCLK, dev->board.xclk, |
399 | EM28XX_XCLK_IR_RC5_MODE); | |
a924a499 | 400 | |
4b92253a DH |
401 | /* Setup the proper handler based on the chip */ |
402 | switch (dev->chip_id) { | |
403 | case CHIP_ID_EM2860: | |
404 | case CHIP_ID_EM2883: | |
405 | ir->get_key = default_polling_getkey; | |
91812fa7 | 406 | break; |
4b92253a DH |
407 | case CHIP_ID_EM2874: |
408 | ir->get_key = em2874_polling_getkey; | |
4b92253a DH |
409 | em28xx_write_regs(dev, EM2874_R50_IR_CONFIG, &ir_config, 1); |
410 | break; | |
411 | default: | |
412 | printk("Unrecognized em28xx chip id: IR not supported\n"); | |
950b0f5a MCC |
413 | rc = -EINVAL; |
414 | } | |
415 | ||
416 | return rc; | |
417 | } | |
418 | ||
419 | int em28xx_ir_init(struct em28xx *dev) | |
420 | { | |
421 | struct em28xx_IR *ir; | |
422 | struct input_dev *input_dev; | |
423 | int err = -ENOMEM; | |
424 | ||
425 | if (dev->board.ir_codes == NULL) { | |
426 | /* No remote control support */ | |
427 | return 0; | |
a924a499 MCC |
428 | } |
429 | ||
950b0f5a MCC |
430 | ir = kzalloc(sizeof(*ir), GFP_KERNEL); |
431 | input_dev = input_allocate_device(); | |
432 | if (!ir || !input_dev) | |
433 | goto err_out_free; | |
434 | ||
435 | /* record handles to ourself */ | |
436 | ir->dev = dev; | |
437 | dev->ir = ir; | |
438 | ||
439 | ir->input = input_dev; | |
440 | ||
441 | /* | |
442 | * em2874 supports more protocols. For now, let's just announce | |
443 | * the two protocols that were already tested | |
444 | */ | |
445 | ir->props.allowed_protos = IR_TYPE_RC5 | IR_TYPE_NEC; | |
446 | ir->props.priv = ir; | |
447 | ir->props.change_protocol = em28xx_ir_change_protocol; | |
448 | ||
4b92253a DH |
449 | /* This is how often we ask the chip for IR information */ |
450 | ir->polling = 100; /* ms */ | |
451 | ||
a924a499 MCC |
452 | /* init input device */ |
453 | snprintf(ir->name, sizeof(ir->name), "em28xx IR (%s)", | |
454 | dev->name); | |
455 | ||
456 | usb_make_path(dev->udev, ir->phys, sizeof(ir->phys)); | |
457 | strlcat(ir->phys, "/input0", sizeof(ir->phys)); | |
458 | ||
950b0f5a MCC |
459 | /* Set IR protocol */ |
460 | em28xx_ir_change_protocol(ir, dev->board.ir_codes->ir_type); | |
579e7d60 | 461 | err = ir_input_init(input_dev, &ir->ir, IR_TYPE_OTHER); |
055cd556 MCC |
462 | if (err < 0) |
463 | goto err_out_free; | |
464 | ||
a924a499 MCC |
465 | input_dev->name = ir->name; |
466 | input_dev->phys = ir->phys; | |
467 | input_dev->id.bustype = BUS_USB; | |
468 | input_dev->id.version = 1; | |
469 | input_dev->id.vendor = le16_to_cpu(dev->udev->descriptor.idVendor); | |
470 | input_dev->id.product = le16_to_cpu(dev->udev->descriptor.idProduct); | |
471 | ||
472 | input_dev->dev.parent = &dev->udev->dev; | |
950b0f5a | 473 | |
a924a499 MCC |
474 | |
475 | em28xx_ir_start(ir); | |
476 | ||
477 | /* all done */ | |
950b0f5a | 478 | err = ir_input_register(ir->input, dev->board.ir_codes, |
727e625c | 479 | &ir->props, MODULE_NAME); |
a924a499 MCC |
480 | if (err) |
481 | goto err_out_stop; | |
482 | ||
483 | return 0; | |
484 | err_out_stop: | |
485 | em28xx_ir_stop(ir); | |
486 | dev->ir = NULL; | |
487 | err_out_free: | |
a924a499 MCC |
488 | kfree(ir); |
489 | return err; | |
490 | } | |
491 | ||
492 | int em28xx_ir_fini(struct em28xx *dev) | |
493 | { | |
494 | struct em28xx_IR *ir = dev->ir; | |
495 | ||
496 | /* skip detach on non attached boards */ | |
497 | if (!ir) | |
498 | return 0; | |
499 | ||
500 | em28xx_ir_stop(ir); | |
38ef6aa8 | 501 | ir_input_unregister(ir->input); |
a924a499 MCC |
502 | kfree(ir); |
503 | ||
504 | /* done */ | |
505 | dev->ir = NULL; | |
506 | return 0; | |
507 | } | |
508 | ||
509 | /********************************************************** | |
510 | Handle Webcam snapshot button | |
511 | **********************************************************/ | |
512 | ||
a9fc52bc DH |
513 | static void em28xx_query_sbutton(struct work_struct *work) |
514 | { | |
515 | /* Poll the register and see if the button is depressed */ | |
516 | struct em28xx *dev = | |
517 | container_of(work, struct em28xx, sbutton_query_work.work); | |
518 | int ret; | |
519 | ||
520 | ret = em28xx_read_reg(dev, EM28XX_R0C_USBSUSP); | |
521 | ||
522 | if (ret & EM28XX_R0C_USBSUSP_SNAPSHOT) { | |
523 | u8 cleared; | |
524 | /* Button is depressed, clear the register */ | |
525 | cleared = ((u8) ret) & ~EM28XX_R0C_USBSUSP_SNAPSHOT; | |
526 | em28xx_write_regs(dev, EM28XX_R0C_USBSUSP, &cleared, 1); | |
527 | ||
528 | /* Not emulate the keypress */ | |
529 | input_report_key(dev->sbutton_input_dev, EM28XX_SNAPSHOT_KEY, | |
530 | 1); | |
531 | /* Now unpress the key */ | |
532 | input_report_key(dev->sbutton_input_dev, EM28XX_SNAPSHOT_KEY, | |
533 | 0); | |
534 | } | |
535 | ||
536 | /* Schedule next poll */ | |
537 | schedule_delayed_work(&dev->sbutton_query_work, | |
538 | msecs_to_jiffies(EM28XX_SBUTTON_QUERY_INTERVAL)); | |
539 | } | |
540 | ||
541 | void em28xx_register_snapshot_button(struct em28xx *dev) | |
542 | { | |
543 | struct input_dev *input_dev; | |
544 | int err; | |
545 | ||
546 | em28xx_info("Registering snapshot button...\n"); | |
547 | input_dev = input_allocate_device(); | |
548 | if (!input_dev) { | |
549 | em28xx_errdev("input_allocate_device failed\n"); | |
550 | return; | |
551 | } | |
552 | ||
553 | usb_make_path(dev->udev, dev->snapshot_button_path, | |
554 | sizeof(dev->snapshot_button_path)); | |
555 | strlcat(dev->snapshot_button_path, "/sbutton", | |
556 | sizeof(dev->snapshot_button_path)); | |
557 | INIT_DELAYED_WORK(&dev->sbutton_query_work, em28xx_query_sbutton); | |
558 | ||
559 | input_dev->name = "em28xx snapshot button"; | |
560 | input_dev->phys = dev->snapshot_button_path; | |
561 | input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP); | |
562 | set_bit(EM28XX_SNAPSHOT_KEY, input_dev->keybit); | |
563 | input_dev->keycodesize = 0; | |
564 | input_dev->keycodemax = 0; | |
565 | input_dev->id.bustype = BUS_USB; | |
566 | input_dev->id.vendor = le16_to_cpu(dev->udev->descriptor.idVendor); | |
567 | input_dev->id.product = le16_to_cpu(dev->udev->descriptor.idProduct); | |
568 | input_dev->id.version = 1; | |
569 | input_dev->dev.parent = &dev->udev->dev; | |
570 | ||
571 | err = input_register_device(input_dev); | |
572 | if (err) { | |
573 | em28xx_errdev("input_register_device failed\n"); | |
574 | input_free_device(input_dev); | |
575 | return; | |
576 | } | |
577 | ||
578 | dev->sbutton_input_dev = input_dev; | |
579 | schedule_delayed_work(&dev->sbutton_query_work, | |
580 | msecs_to_jiffies(EM28XX_SBUTTON_QUERY_INTERVAL)); | |
581 | return; | |
582 | ||
583 | } | |
584 | ||
585 | void em28xx_deregister_snapshot_button(struct em28xx *dev) | |
586 | { | |
587 | if (dev->sbutton_input_dev != NULL) { | |
588 | em28xx_info("Deregistering snapshot button\n"); | |
589 | cancel_rearming_delayed_work(&dev->sbutton_query_work); | |
590 | input_unregister_device(dev->sbutton_input_dev); | |
591 | dev->sbutton_input_dev = NULL; | |
592 | } | |
593 | return; | |
594 | } |