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