Commit | Line | Data |
---|---|---|
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 | 27 | #include <linux/interrupt.h> |
d5e52653 | 28 | #include <linux/usb.h> |
5a0e3ad6 | 29 | #include <linux/slab.h> |
d5e52653 | 30 | |
f7abcd38 | 31 | #include "em28xx.h" |
d5e52653 | 32 | |
a9fc52bc DH |
33 | #define EM28XX_SNAPSHOT_KEY KEY_CAMERA |
34 | #define EM28XX_SBUTTON_QUERY_INTERVAL 500 | |
35 | #define EM28XX_R0C_USBSUSP_SNAPSHOT 0x20 | |
36 | ||
c8793b03 | 37 | static unsigned int ir_debug; |
d5e52653 | 38 | module_param(ir_debug, int, 0644); |
6ea54d93 | 39 | MODULE_PARM_DESC(ir_debug, "enable debug messages [IR]"); |
d5e52653 | 40 | |
727e625c MCC |
41 | #define MODULE_NAME "em28xx" |
42 | ||
a924a499 | 43 | #define i2cdprintk(fmt, arg...) \ |
6ea54d93 | 44 | if (ir_debug) { \ |
1df8e986 | 45 | printk(KERN_DEBUG "%s/ir: " fmt, ir->name , ## arg); \ |
6ea54d93 | 46 | } |
d5e52653 | 47 | |
a924a499 MCC |
48 | #define dprintk(fmt, arg...) \ |
49 | if (ir_debug) { \ | |
50 | printk(KERN_DEBUG "%s/ir: " fmt, ir->name , ## arg); \ | |
51 | } | |
52 | ||
53 | /********************************************************** | |
54 | Polling structure used by em28xx IR's | |
55 | **********************************************************/ | |
56 | ||
4b92253a DH |
57 | struct em28xx_ir_poll_result { |
58 | unsigned int toggle_bit:1; | |
59 | unsigned int read_count:7; | |
60 | u8 rc_address; | |
61 | u8 rc_data[4]; /* 1 byte on em2860/2880, 4 on em2874 */ | |
62 | }; | |
63 | ||
a924a499 MCC |
64 | struct em28xx_IR { |
65 | struct em28xx *dev; | |
d8b4b582 | 66 | struct rc_dev *rc; |
a924a499 MCC |
67 | char name[32]; |
68 | char phys[32]; | |
69 | ||
70 | /* poll external decoder */ | |
71 | int polling; | |
f263bac9 | 72 | struct delayed_work work; |
0278155c | 73 | unsigned int full_code:1; |
4b92253a | 74 | unsigned int last_readcount; |
a924a499 | 75 | |
4b92253a | 76 | int (*get_key)(struct em28xx_IR *, struct em28xx_ir_poll_result *); |
a924a499 MCC |
77 | }; |
78 | ||
79 | /********************************************************** | |
80 | I2C IR based get keycodes - should be used with ir-kbd-i2c | |
81 | **********************************************************/ | |
d5e52653 | 82 | |
c8793b03 | 83 | int em28xx_get_key_terratec(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw) |
e43f14af MR |
84 | { |
85 | unsigned char b; | |
86 | ||
87 | /* poll IR chip */ | |
c668f32d | 88 | if (1 != i2c_master_recv(ir->c, &b, 1)) { |
a924a499 | 89 | i2cdprintk("read error\n"); |
e43f14af MR |
90 | return -EIO; |
91 | } | |
92 | ||
93 | /* it seems that 0xFE indicates that a button is still hold | |
4f9c05aa MCC |
94 | down, while 0xff indicates that no button is hold |
95 | down. 0xfe sequences are sometimes interrupted by 0xFF */ | |
e43f14af | 96 | |
a924a499 | 97 | i2cdprintk("key %02x\n", b); |
e43f14af | 98 | |
4f9c05aa | 99 | if (b == 0xff) |
e43f14af MR |
100 | return 0; |
101 | ||
4f9c05aa | 102 | if (b == 0xfe) |
e43f14af MR |
103 | /* keep old data */ |
104 | return 1; | |
105 | ||
106 | *ir_key = b; | |
107 | *ir_raw = b; | |
108 | return 1; | |
109 | } | |
110 | ||
c8793b03 | 111 | int em28xx_get_key_em_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw) |
d5e52653 MCC |
112 | { |
113 | unsigned char buf[2]; | |
b779974b MCC |
114 | u16 code; |
115 | int size; | |
d5e52653 MCC |
116 | |
117 | /* poll IR chip */ | |
b779974b MCC |
118 | size = i2c_master_recv(ir->c, buf, sizeof(buf)); |
119 | ||
120 | if (size != 2) | |
d5e52653 MCC |
121 | return -EIO; |
122 | ||
123 | /* Does eliminate repeated parity code */ | |
6ea54d93 | 124 | if (buf[1] == 0xff) |
d5e52653 MCC |
125 | return 0; |
126 | ||
6ea54d93 | 127 | ir->old = buf[1]; |
d5e52653 | 128 | |
b779974b MCC |
129 | /* |
130 | * Rearranges bits to the right order. | |
131 | * The bit order were determined experimentally by using | |
132 | * The original Hauppauge Grey IR and another RC5 that uses addr=0x08 | |
133 | * The RC5 code has 14 bits, but we've experimentally determined | |
134 | * the meaning for only 11 bits. | |
135 | * So, the code translation is not complete. Yet, it is enough to | |
136 | * work with the provided RC5 IR. | |
137 | */ | |
138 | code = | |
139 | ((buf[0] & 0x01) ? 0x0020 : 0) | /* 0010 0000 */ | |
140 | ((buf[0] & 0x02) ? 0x0010 : 0) | /* 0001 0000 */ | |
141 | ((buf[0] & 0x04) ? 0x0008 : 0) | /* 0000 1000 */ | |
142 | ((buf[0] & 0x08) ? 0x0004 : 0) | /* 0000 0100 */ | |
143 | ((buf[0] & 0x10) ? 0x0002 : 0) | /* 0000 0010 */ | |
144 | ((buf[0] & 0x20) ? 0x0001 : 0) | /* 0000 0001 */ | |
145 | ((buf[1] & 0x08) ? 0x1000 : 0) | /* 0001 0000 */ | |
146 | ((buf[1] & 0x10) ? 0x0800 : 0) | /* 0000 1000 */ | |
147 | ((buf[1] & 0x20) ? 0x0400 : 0) | /* 0000 0100 */ | |
148 | ((buf[1] & 0x40) ? 0x0200 : 0) | /* 0000 0010 */ | |
149 | ((buf[1] & 0x80) ? 0x0100 : 0); /* 0000 0001 */ | |
150 | ||
151 | i2cdprintk("ir hauppauge (em2840): code=0x%02x (rcv=0x%02x%02x)\n", | |
152 | code, buf[1], buf[0]); | |
d5e52653 MCC |
153 | |
154 | /* return key */ | |
155 | *ir_key = code; | |
156 | *ir_raw = code; | |
157 | return 1; | |
158 | } | |
159 | ||
c8793b03 MCC |
160 | int em28xx_get_key_pinnacle_usb_grey(struct IR_i2c *ir, u32 *ir_key, |
161 | u32 *ir_raw) | |
366cc64b MR |
162 | { |
163 | unsigned char buf[3]; | |
164 | ||
165 | /* poll IR chip */ | |
166 | ||
c668f32d | 167 | if (3 != i2c_master_recv(ir->c, buf, 3)) { |
a924a499 | 168 | i2cdprintk("read error\n"); |
366cc64b MR |
169 | return -EIO; |
170 | } | |
171 | ||
a924a499 | 172 | i2cdprintk("key %02x\n", buf[2]&0x3f); |
6ea54d93 | 173 | if (buf[0] != 0x00) |
366cc64b | 174 | return 0; |
366cc64b MR |
175 | |
176 | *ir_key = buf[2]&0x3f; | |
177 | *ir_raw = buf[2]&0x3f; | |
178 | ||
179 | return 1; | |
180 | } | |
181 | ||
ca39d84d MA |
182 | int em28xx_get_key_winfast_usbii_deluxe(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw) |
183 | { | |
184 | unsigned char subaddr, keydetect, key; | |
185 | ||
186 | struct i2c_msg msg[] = { { .addr = ir->c->addr, .flags = 0, .buf = &subaddr, .len = 1}, | |
187 | ||
188 | { .addr = ir->c->addr, .flags = I2C_M_RD, .buf = &keydetect, .len = 1} }; | |
189 | ||
190 | subaddr = 0x10; | |
191 | if (2 != i2c_transfer(ir->c->adapter, msg, 2)) { | |
192 | i2cdprintk("read error\n"); | |
193 | return -EIO; | |
194 | } | |
195 | if (keydetect == 0x00) | |
196 | return 0; | |
197 | ||
198 | subaddr = 0x00; | |
199 | msg[1].buf = &key; | |
200 | if (2 != i2c_transfer(ir->c->adapter, msg, 2)) { | |
201 | i2cdprintk("read error\n"); | |
202 | return -EIO; | |
203 | } | |
204 | if (key == 0x00) | |
205 | return 0; | |
206 | ||
207 | *ir_key = key; | |
208 | *ir_raw = key; | |
209 | return 1; | |
210 | } | |
211 | ||
a924a499 MCC |
212 | /********************************************************** |
213 | Poll based get keycode functions | |
214 | **********************************************************/ | |
215 | ||
4b92253a DH |
216 | /* This is for the em2860/em2880 */ |
217 | static int default_polling_getkey(struct em28xx_IR *ir, | |
218 | struct em28xx_ir_poll_result *poll_result) | |
a924a499 MCC |
219 | { |
220 | struct em28xx *dev = ir->dev; | |
221 | int rc; | |
4b92253a | 222 | u8 msg[3] = { 0, 0, 0 }; |
a924a499 | 223 | |
0a6b8a85 MCC |
224 | /* Read key toggle, brand, and key code |
225 | on registers 0x45, 0x46 and 0x47 | |
226 | */ | |
a924a499 | 227 | rc = dev->em28xx_read_reg_req_len(dev, 0, EM28XX_R45_IR, |
0a6b8a85 | 228 | msg, sizeof(msg)); |
a924a499 MCC |
229 | if (rc < 0) |
230 | return rc; | |
231 | ||
4b92253a DH |
232 | /* Infrared toggle (Reg 0x45[7]) */ |
233 | poll_result->toggle_bit = (msg[0] >> 7); | |
234 | ||
235 | /* Infrared read count (Reg 0x45[6:0] */ | |
236 | poll_result->read_count = (msg[0] & 0x7f); | |
237 | ||
238 | /* Remote Control Address (Reg 0x46) */ | |
239 | poll_result->rc_address = msg[1]; | |
240 | ||
241 | /* Remote Control Data (Reg 0x47) */ | |
242 | poll_result->rc_data[0] = msg[2]; | |
243 | ||
244 | return 0; | |
245 | } | |
246 | ||
247 | static int em2874_polling_getkey(struct em28xx_IR *ir, | |
248 | struct em28xx_ir_poll_result *poll_result) | |
249 | { | |
250 | struct em28xx *dev = ir->dev; | |
251 | int rc; | |
252 | u8 msg[5] = { 0, 0, 0, 0, 0 }; | |
253 | ||
254 | /* Read key toggle, brand, and key code | |
255 | on registers 0x51-55 | |
256 | */ | |
257 | rc = dev->em28xx_read_reg_req_len(dev, 0, EM2874_R51_IR, | |
258 | msg, sizeof(msg)); | |
259 | if (rc < 0) | |
260 | return rc; | |
261 | ||
262 | /* Infrared toggle (Reg 0x51[7]) */ | |
263 | poll_result->toggle_bit = (msg[0] >> 7); | |
264 | ||
265 | /* Infrared read count (Reg 0x51[6:0] */ | |
266 | poll_result->read_count = (msg[0] & 0x7f); | |
267 | ||
268 | /* Remote Control Address (Reg 0x52) */ | |
269 | poll_result->rc_address = msg[1]; | |
270 | ||
271 | /* Remote Control Data (Reg 0x53-55) */ | |
272 | poll_result->rc_data[0] = msg[2]; | |
273 | poll_result->rc_data[1] = msg[3]; | |
274 | poll_result->rc_data[2] = msg[4]; | |
275 | ||
276 | return 0; | |
a924a499 MCC |
277 | } |
278 | ||
279 | /********************************************************** | |
280 | Polling code for em28xx | |
281 | **********************************************************/ | |
282 | ||
283 | static void em28xx_ir_handle_key(struct em28xx_IR *ir) | |
284 | { | |
4b92253a | 285 | int result; |
4b92253a DH |
286 | struct em28xx_ir_poll_result poll_result; |
287 | ||
288 | /* read the registers containing the IR status */ | |
289 | result = ir->get_key(ir, &poll_result); | |
603044d8 | 290 | if (unlikely(result < 0)) { |
4b92253a | 291 | dprintk("ir->get_key() failed %d\n", result); |
a924a499 | 292 | return; |
4b92253a | 293 | } |
a924a499 | 294 | |
603044d8 MCC |
295 | if (unlikely(poll_result.read_count != ir->last_readcount)) { |
296 | dprintk("%s: toggle: %d, count: %d, key 0x%02x%02x\n", __func__, | |
297 | poll_result.toggle_bit, poll_result.read_count, | |
298 | poll_result.rc_address, poll_result.rc_data[0]); | |
a469585b | 299 | if (ir->full_code) |
d8b4b582 | 300 | ir_keydown(ir->rc, |
a469585b DH |
301 | poll_result.rc_address << 8 | |
302 | poll_result.rc_data[0], | |
303 | poll_result.toggle_bit); | |
304 | else | |
d8b4b582 | 305 | ir_keydown(ir->rc, |
a469585b DH |
306 | poll_result.rc_data[0], |
307 | poll_result.toggle_bit); | |
a469585b | 308 | |
603044d8 MCC |
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 | else | |
317 | ir->last_readcount = poll_result.read_count; | |
318 | } | |
a924a499 MCC |
319 | } |
320 | ||
a924a499 MCC |
321 | static void em28xx_ir_work(struct work_struct *work) |
322 | { | |
f263bac9 | 323 | struct em28xx_IR *ir = container_of(work, struct em28xx_IR, work.work); |
a924a499 MCC |
324 | |
325 | em28xx_ir_handle_key(ir); | |
f263bac9 | 326 | schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling)); |
a924a499 MCC |
327 | } |
328 | ||
d8b4b582 | 329 | static int em28xx_ir_start(struct rc_dev *rc) |
a924a499 | 330 | { |
d8b4b582 | 331 | struct em28xx_IR *ir = rc->priv; |
c373cabf | 332 | |
f263bac9 JD |
333 | INIT_DELAYED_WORK(&ir->work, em28xx_ir_work); |
334 | schedule_delayed_work(&ir->work, 0); | |
c373cabf MCC |
335 | |
336 | return 0; | |
a924a499 MCC |
337 | } |
338 | ||
d8b4b582 | 339 | static void em28xx_ir_stop(struct rc_dev *rc) |
a924a499 | 340 | { |
d8b4b582 | 341 | struct em28xx_IR *ir = rc->priv; |
c373cabf | 342 | |
f263bac9 | 343 | cancel_delayed_work_sync(&ir->work); |
a924a499 MCC |
344 | } |
345 | ||
d8b4b582 | 346 | int em28xx_ir_change_protocol(struct rc_dev *rc_dev, u64 ir_type) |
a924a499 | 347 | { |
950b0f5a | 348 | int rc = 0; |
d8b4b582 | 349 | struct em28xx_IR *ir = rc_dev->priv; |
950b0f5a MCC |
350 | struct em28xx *dev = ir->dev; |
351 | u8 ir_config = EM2874_IR_RC5; | |
1bad429e MCC |
352 | |
353 | /* Adjust xclk based o IR table for RC5/NEC tables */ | |
950b0f5a MCC |
354 | |
355 | if (ir_type == IR_TYPE_RC5) { | |
1bad429e MCC |
356 | dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE; |
357 | ir->full_code = 1; | |
950b0f5a | 358 | } else if (ir_type == IR_TYPE_NEC) { |
1bad429e MCC |
359 | dev->board.xclk &= ~EM28XX_XCLK_IR_RC5_MODE; |
360 | ir_config = EM2874_IR_NEC; | |
361 | ir->full_code = 1; | |
c373cabf | 362 | } else if (ir_type != IR_TYPE_UNKNOWN) |
950b0f5a MCC |
363 | rc = -EINVAL; |
364 | ||
1bad429e MCC |
365 | em28xx_write_reg_bits(dev, EM28XX_R0F_XCLK, dev->board.xclk, |
366 | EM28XX_XCLK_IR_RC5_MODE); | |
a924a499 | 367 | |
4b92253a DH |
368 | /* Setup the proper handler based on the chip */ |
369 | switch (dev->chip_id) { | |
370 | case CHIP_ID_EM2860: | |
371 | case CHIP_ID_EM2883: | |
372 | ir->get_key = default_polling_getkey; | |
91812fa7 | 373 | break; |
4b92253a DH |
374 | case CHIP_ID_EM2874: |
375 | ir->get_key = em2874_polling_getkey; | |
4b92253a DH |
376 | em28xx_write_regs(dev, EM2874_R50_IR_CONFIG, &ir_config, 1); |
377 | break; | |
378 | default: | |
379 | printk("Unrecognized em28xx chip id: IR not supported\n"); | |
950b0f5a MCC |
380 | rc = -EINVAL; |
381 | } | |
382 | ||
383 | return rc; | |
384 | } | |
385 | ||
386 | int em28xx_ir_init(struct em28xx *dev) | |
387 | { | |
388 | struct em28xx_IR *ir; | |
d8b4b582 | 389 | struct rc_dev *rc; |
950b0f5a MCC |
390 | int err = -ENOMEM; |
391 | ||
392 | if (dev->board.ir_codes == NULL) { | |
393 | /* No remote control support */ | |
394 | return 0; | |
a924a499 MCC |
395 | } |
396 | ||
950b0f5a | 397 | ir = kzalloc(sizeof(*ir), GFP_KERNEL); |
d8b4b582 DH |
398 | rc = rc_allocate_device(); |
399 | if (!ir || !rc) | |
950b0f5a MCC |
400 | goto err_out_free; |
401 | ||
402 | /* record handles to ourself */ | |
403 | ir->dev = dev; | |
404 | dev->ir = ir; | |
d8b4b582 | 405 | ir->rc = rc; |
950b0f5a MCC |
406 | |
407 | /* | |
408 | * em2874 supports more protocols. For now, let's just announce | |
409 | * the two protocols that were already tested | |
410 | */ | |
d8b4b582 DH |
411 | rc->allowed_protos = IR_TYPE_RC5 | IR_TYPE_NEC; |
412 | rc->priv = ir; | |
413 | rc->change_protocol = em28xx_ir_change_protocol; | |
414 | rc->open = em28xx_ir_start; | |
415 | rc->close = em28xx_ir_stop; | |
c373cabf MCC |
416 | |
417 | /* By default, keep protocol field untouched */ | |
d8b4b582 | 418 | err = em28xx_ir_change_protocol(rc, IR_TYPE_UNKNOWN); |
c373cabf MCC |
419 | if (err) |
420 | goto err_out_free; | |
950b0f5a | 421 | |
4b92253a DH |
422 | /* This is how often we ask the chip for IR information */ |
423 | ir->polling = 100; /* ms */ | |
424 | ||
a924a499 MCC |
425 | /* init input device */ |
426 | snprintf(ir->name, sizeof(ir->name), "em28xx IR (%s)", | |
427 | dev->name); | |
428 | ||
429 | usb_make_path(dev->udev, ir->phys, sizeof(ir->phys)); | |
430 | strlcat(ir->phys, "/input0", sizeof(ir->phys)); | |
431 | ||
d8b4b582 DH |
432 | rc->input_name = ir->name; |
433 | rc->input_phys = ir->phys; | |
434 | rc->input_id.bustype = BUS_USB; | |
435 | rc->input_id.version = 1; | |
436 | rc->input_id.vendor = le16_to_cpu(dev->udev->descriptor.idVendor); | |
437 | rc->input_id.product = le16_to_cpu(dev->udev->descriptor.idProduct); | |
438 | rc->dev.parent = &dev->udev->dev; | |
439 | rc->map_name = dev->board.ir_codes; | |
440 | rc->driver_name = MODULE_NAME; | |
a924a499 MCC |
441 | |
442 | /* all done */ | |
d8b4b582 | 443 | err = rc_register_device(rc); |
a924a499 MCC |
444 | if (err) |
445 | goto err_out_stop; | |
446 | ||
447 | return 0; | |
d8b4b582 | 448 | |
a924a499 | 449 | err_out_stop: |
a924a499 MCC |
450 | dev->ir = NULL; |
451 | err_out_free: | |
d8b4b582 | 452 | rc_free_device(rc); |
a924a499 MCC |
453 | kfree(ir); |
454 | return err; | |
455 | } | |
456 | ||
457 | int em28xx_ir_fini(struct em28xx *dev) | |
458 | { | |
459 | struct em28xx_IR *ir = dev->ir; | |
460 | ||
461 | /* skip detach on non attached boards */ | |
462 | if (!ir) | |
463 | return 0; | |
464 | ||
d8b4b582 DH |
465 | em28xx_ir_stop(ir->rc); |
466 | rc_unregister_device(ir->rc); | |
a924a499 MCC |
467 | kfree(ir); |
468 | ||
469 | /* done */ | |
470 | dev->ir = NULL; | |
471 | return 0; | |
472 | } | |
473 | ||
474 | /********************************************************** | |
475 | Handle Webcam snapshot button | |
476 | **********************************************************/ | |
477 | ||
a9fc52bc DH |
478 | static void em28xx_query_sbutton(struct work_struct *work) |
479 | { | |
480 | /* Poll the register and see if the button is depressed */ | |
481 | struct em28xx *dev = | |
482 | container_of(work, struct em28xx, sbutton_query_work.work); | |
483 | int ret; | |
484 | ||
485 | ret = em28xx_read_reg(dev, EM28XX_R0C_USBSUSP); | |
486 | ||
487 | if (ret & EM28XX_R0C_USBSUSP_SNAPSHOT) { | |
488 | u8 cleared; | |
489 | /* Button is depressed, clear the register */ | |
490 | cleared = ((u8) ret) & ~EM28XX_R0C_USBSUSP_SNAPSHOT; | |
491 | em28xx_write_regs(dev, EM28XX_R0C_USBSUSP, &cleared, 1); | |
492 | ||
493 | /* Not emulate the keypress */ | |
494 | input_report_key(dev->sbutton_input_dev, EM28XX_SNAPSHOT_KEY, | |
495 | 1); | |
496 | /* Now unpress the key */ | |
497 | input_report_key(dev->sbutton_input_dev, EM28XX_SNAPSHOT_KEY, | |
498 | 0); | |
499 | } | |
500 | ||
501 | /* Schedule next poll */ | |
502 | schedule_delayed_work(&dev->sbutton_query_work, | |
503 | msecs_to_jiffies(EM28XX_SBUTTON_QUERY_INTERVAL)); | |
504 | } | |
505 | ||
506 | void em28xx_register_snapshot_button(struct em28xx *dev) | |
507 | { | |
508 | struct input_dev *input_dev; | |
509 | int err; | |
510 | ||
511 | em28xx_info("Registering snapshot button...\n"); | |
512 | input_dev = input_allocate_device(); | |
513 | if (!input_dev) { | |
514 | em28xx_errdev("input_allocate_device failed\n"); | |
515 | return; | |
516 | } | |
517 | ||
518 | usb_make_path(dev->udev, dev->snapshot_button_path, | |
519 | sizeof(dev->snapshot_button_path)); | |
520 | strlcat(dev->snapshot_button_path, "/sbutton", | |
521 | sizeof(dev->snapshot_button_path)); | |
522 | INIT_DELAYED_WORK(&dev->sbutton_query_work, em28xx_query_sbutton); | |
523 | ||
524 | input_dev->name = "em28xx snapshot button"; | |
525 | input_dev->phys = dev->snapshot_button_path; | |
526 | input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP); | |
527 | set_bit(EM28XX_SNAPSHOT_KEY, input_dev->keybit); | |
528 | input_dev->keycodesize = 0; | |
529 | input_dev->keycodemax = 0; | |
530 | input_dev->id.bustype = BUS_USB; | |
531 | input_dev->id.vendor = le16_to_cpu(dev->udev->descriptor.idVendor); | |
532 | input_dev->id.product = le16_to_cpu(dev->udev->descriptor.idProduct); | |
533 | input_dev->id.version = 1; | |
534 | input_dev->dev.parent = &dev->udev->dev; | |
535 | ||
536 | err = input_register_device(input_dev); | |
537 | if (err) { | |
538 | em28xx_errdev("input_register_device failed\n"); | |
539 | input_free_device(input_dev); | |
540 | return; | |
541 | } | |
542 | ||
543 | dev->sbutton_input_dev = input_dev; | |
544 | schedule_delayed_work(&dev->sbutton_query_work, | |
545 | msecs_to_jiffies(EM28XX_SBUTTON_QUERY_INTERVAL)); | |
546 | return; | |
547 | ||
548 | } | |
549 | ||
550 | void em28xx_deregister_snapshot_button(struct em28xx *dev) | |
551 | { | |
552 | if (dev->sbutton_input_dev != NULL) { | |
553 | em28xx_info("Deregistering snapshot button\n"); | |
554 | cancel_rearming_delayed_work(&dev->sbutton_query_work); | |
555 | input_unregister_device(dev->sbutton_input_dev); | |
556 | dev->sbutton_input_dev = NULL; | |
557 | } | |
558 | return; | |
559 | } |