Commit | Line | Data |
---|---|---|
dbda8f70 AW |
1 | /* |
2 | * Driver for the Conexant CX23885/7/8 PCIe bridge | |
3 | * | |
4 | * Infrared remote control input device | |
5 | * | |
6 | * Most of this file is | |
7 | * | |
6afdeaf8 | 8 | * Copyright (C) 2009 Andy Walls <awalls@md.metrocast.net> |
dbda8f70 AW |
9 | * |
10 | * However, the cx23885_input_{init,fini} functions contained herein are | |
11 | * derived from Linux kernel files linux/media/video/.../...-input.c marked as: | |
12 | * | |
13 | * Copyright (C) 2008 <srinivasa.deevi at conexant dot com> | |
14 | * Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it> | |
15 | * Markus Rechberger <mrechberger@gmail.com> | |
16 | * Mauro Carvalho Chehab <mchehab@infradead.org> | |
17 | * Sascha Sommer <saschasommer@freenet.de> | |
18 | * Copyright (C) 2004, 2005 Chris Pascoe | |
19 | * Copyright (C) 2003, 2004 Gerd Knorr | |
20 | * Copyright (C) 2003 Pavel Machek | |
21 | * | |
22 | * This program is free software; you can redistribute it and/or | |
23 | * modify it under the terms of the GNU General Public License | |
24 | * as published by the Free Software Foundation; either version 2 | |
25 | * of the License, or (at your option) any later version. | |
26 | * | |
27 | * This program is distributed in the hope that it will be useful, | |
28 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
29 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
30 | * GNU General Public License for more details. | |
dbda8f70 AW |
31 | */ |
32 | ||
5a0e3ad6 | 33 | #include <linux/slab.h> |
6bda9644 | 34 | #include <media/rc-core.h> |
dbda8f70 AW |
35 | #include <media/v4l2-subdev.h> |
36 | ||
37 | #include "cx23885.h" | |
ada73eee | 38 | #include "cx23885-input.h" |
dbda8f70 | 39 | |
727e625c MCC |
40 | #define MODULE_NAME "cx23885" |
41 | ||
43c24078 AW |
42 | static void cx23885_input_process_measurements(struct cx23885_dev *dev, |
43 | bool overrun) | |
dbda8f70 | 44 | { |
43c24078 | 45 | struct cx23885_kernel_ir *kernel_ir = dev->kernel_ir; |
dbda8f70 | 46 | |
43c24078 | 47 | ssize_t num; |
dbda8f70 | 48 | int count, i; |
43c24078 | 49 | bool handle = false; |
c02e0d12 | 50 | struct ir_raw_event ir_core_event[64]; |
dbda8f70 AW |
51 | |
52 | do { | |
43c24078 | 53 | num = 0; |
c02e0d12 AW |
54 | v4l2_subdev_call(dev->sd_ir, ir, rx_read, (u8 *) ir_core_event, |
55 | sizeof(ir_core_event), &num); | |
dbda8f70 | 56 | |
c02e0d12 | 57 | count = num / sizeof(struct ir_raw_event); |
dbda8f70 | 58 | |
43c24078 | 59 | for (i = 0; i < count; i++) { |
d8b4b582 | 60 | ir_raw_event_store(kernel_ir->rc, |
c02e0d12 | 61 | &ir_core_event[i]); |
43c24078 | 62 | handle = true; |
dbda8f70 | 63 | } |
dbda8f70 | 64 | } while (num != 0); |
43c24078 AW |
65 | |
66 | if (overrun) | |
d8b4b582 | 67 | ir_raw_event_reset(kernel_ir->rc); |
43c24078 | 68 | else if (handle) |
d8b4b582 | 69 | ir_raw_event_handle(kernel_ir->rc); |
dbda8f70 AW |
70 | } |
71 | ||
72 | void cx23885_input_rx_work_handler(struct cx23885_dev *dev, u32 events) | |
73 | { | |
74 | struct v4l2_subdev_ir_parameters params; | |
75 | int overrun, data_available; | |
76 | ||
77 | if (dev->sd_ir == NULL || events == 0) | |
78 | return; | |
79 | ||
80 | switch (dev->board) { | |
9b3d8ecc | 81 | case CX23885_BOARD_HAUPPAUGE_HVR1270: |
dbda8f70 | 82 | case CX23885_BOARD_HAUPPAUGE_HVR1850: |
7fec6fee | 83 | case CX23885_BOARD_HAUPPAUGE_HVR1290: |
076f0e35 | 84 | case CX23885_BOARD_TERRATEC_CINERGY_T_PCIE_DUAL: |
98d109f9 AW |
85 | case CX23885_BOARD_TEVII_S470: |
86 | case CX23885_BOARD_HAUPPAUGE_HVR1250: | |
e5f670b7 | 87 | case CX23885_BOARD_MYGICA_X8507: |
e6001482 LA |
88 | case CX23885_BOARD_TBS_6980: |
89 | case CX23885_BOARD_TBS_6981: | |
d11a3835 | 90 | case CX23885_BOARD_DVBSKY_T9580: |
070e6661 | 91 | case CX23885_BOARD_DVBSKY_T980C: |
92 | case CX23885_BOARD_DVBSKY_S950C: | |
61b103e8 | 93 | case CX23885_BOARD_TT_CT2_4500_CI: |
cba5480c | 94 | case CX23885_BOARD_DVBSKY_S950: |
c29d6a83 | 95 | case CX23885_BOARD_DVBSKY_S952: |
c02ef64a | 96 | case CX23885_BOARD_DVBSKY_T982: |
dbda8f70 | 97 | /* |
98d109f9 | 98 | * The only boards we handle right now. However other boards |
dbda8f70 AW |
99 | * using the CX2388x integrated IR controller should be similar |
100 | */ | |
101 | break; | |
102 | default: | |
103 | return; | |
104 | } | |
105 | ||
106 | overrun = events & (V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN | | |
107 | V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN); | |
108 | ||
109 | data_available = events & (V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED | | |
110 | V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ); | |
111 | ||
112 | if (overrun) { | |
113 | /* If there was a FIFO overrun, stop the device */ | |
114 | v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, ¶ms); | |
115 | params.enable = false; | |
116 | /* Mitigate race with cx23885_input_ir_stop() */ | |
117 | params.shutdown = atomic_read(&dev->ir_input_stopping); | |
118 | v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, ¶ms); | |
119 | } | |
120 | ||
121 | if (data_available) | |
43c24078 | 122 | cx23885_input_process_measurements(dev, overrun); |
dbda8f70 AW |
123 | |
124 | if (overrun) { | |
125 | /* If there was a FIFO overrun, clear & restart the device */ | |
126 | params.enable = true; | |
127 | /* Mitigate race with cx23885_input_ir_stop() */ | |
128 | params.shutdown = atomic_read(&dev->ir_input_stopping); | |
129 | v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, ¶ms); | |
130 | } | |
131 | } | |
132 | ||
43c24078 | 133 | static int cx23885_input_ir_start(struct cx23885_dev *dev) |
dbda8f70 | 134 | { |
dbda8f70 AW |
135 | struct v4l2_subdev_ir_parameters params; |
136 | ||
137 | if (dev->sd_ir == NULL) | |
43c24078 | 138 | return -ENODEV; |
dbda8f70 AW |
139 | |
140 | atomic_set(&dev->ir_input_stopping, 0); | |
141 | ||
dbda8f70 AW |
142 | v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, ¶ms); |
143 | switch (dev->board) { | |
9b3d8ecc | 144 | case CX23885_BOARD_HAUPPAUGE_HVR1270: |
dbda8f70 | 145 | case CX23885_BOARD_HAUPPAUGE_HVR1850: |
7fec6fee | 146 | case CX23885_BOARD_HAUPPAUGE_HVR1290: |
98d109f9 | 147 | case CX23885_BOARD_HAUPPAUGE_HVR1250: |
e5f670b7 | 148 | case CX23885_BOARD_MYGICA_X8507: |
d11a3835 | 149 | case CX23885_BOARD_DVBSKY_T9580: |
070e6661 | 150 | case CX23885_BOARD_DVBSKY_T980C: |
151 | case CX23885_BOARD_DVBSKY_S950C: | |
61b103e8 | 152 | case CX23885_BOARD_TT_CT2_4500_CI: |
cba5480c | 153 | case CX23885_BOARD_DVBSKY_S950: |
c29d6a83 | 154 | case CX23885_BOARD_DVBSKY_S952: |
c02ef64a | 155 | case CX23885_BOARD_DVBSKY_T982: |
dbda8f70 AW |
156 | /* |
157 | * The IR controller on this board only returns pulse widths. | |
158 | * Any other mode setting will fail to set up the device. | |
159 | */ | |
160 | params.mode = V4L2_SUBDEV_IR_MODE_PULSE_WIDTH; | |
161 | params.enable = true; | |
162 | params.interrupt_enable = true; | |
163 | params.shutdown = false; | |
164 | ||
165 | /* Setup for baseband compatible with both RC-5 and RC-6A */ | |
166 | params.modulation = false; | |
167 | /* RC-5: 2,222,222 ns = 1/36 kHz * 32 cycles * 2 marks * 1.25*/ | |
168 | /* RC-6A: 3,333,333 ns = 1/36 kHz * 16 cycles * 6 marks * 1.25*/ | |
169 | params.max_pulse_width = 3333333; /* ns */ | |
170 | /* RC-5: 666,667 ns = 1/36 kHz * 32 cycles * 1 mark * 0.75 */ | |
171 | /* RC-6A: 333,333 ns = 1/36 kHz * 16 cycles * 1 mark * 0.75 */ | |
172 | params.noise_filter_min_width = 333333; /* ns */ | |
173 | /* | |
174 | * This board has inverted receive sense: | |
175 | * mark is received as low logic level; | |
176 | * falling edges are detected as rising edges; etc. | |
177 | */ | |
5a28d9a3 | 178 | params.invert_level = true; |
dbda8f70 | 179 | break; |
076f0e35 | 180 | case CX23885_BOARD_TERRATEC_CINERGY_T_PCIE_DUAL: |
98d109f9 | 181 | case CX23885_BOARD_TEVII_S470: |
e6001482 LA |
182 | case CX23885_BOARD_TBS_6980: |
183 | case CX23885_BOARD_TBS_6981: | |
98d109f9 AW |
184 | /* |
185 | * The IR controller on this board only returns pulse widths. | |
186 | * Any other mode setting will fail to set up the device. | |
187 | */ | |
188 | params.mode = V4L2_SUBDEV_IR_MODE_PULSE_WIDTH; | |
189 | params.enable = true; | |
190 | params.interrupt_enable = true; | |
191 | params.shutdown = false; | |
192 | ||
193 | /* Setup for a standard NEC protocol */ | |
194 | params.carrier_freq = 37917; /* Hz, 455 kHz/12 for NEC */ | |
195 | params.carrier_range_lower = 33000; /* Hz */ | |
196 | params.carrier_range_upper = 43000; /* Hz */ | |
197 | params.duty_cycle = 33; /* percent, 33 percent for NEC */ | |
198 | ||
199 | /* | |
200 | * NEC max pulse width: (64/3)/(455 kHz/12) * 16 nec_units | |
201 | * (64/3)/(455 kHz/12) * 16 nec_units * 1.375 = 12378022 ns | |
202 | */ | |
203 | params.max_pulse_width = 12378022; /* ns */ | |
204 | ||
205 | /* | |
206 | * NEC noise filter min width: (64/3)/(455 kHz/12) * 1 nec_unit | |
207 | * (64/3)/(455 kHz/12) * 1 nec_units * 0.625 = 351648 ns | |
208 | */ | |
209 | params.noise_filter_min_width = 351648; /* ns */ | |
210 | ||
211 | params.modulation = false; | |
212 | params.invert_level = true; | |
213 | break; | |
dbda8f70 AW |
214 | } |
215 | v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, ¶ms); | |
43c24078 AW |
216 | return 0; |
217 | } | |
218 | ||
d8b4b582 | 219 | static int cx23885_input_ir_open(struct rc_dev *rc) |
43c24078 | 220 | { |
d8b4b582 | 221 | struct cx23885_kernel_ir *kernel_ir = rc->priv; |
43c24078 AW |
222 | |
223 | if (kernel_ir->cx == NULL) | |
224 | return -ENODEV; | |
225 | ||
226 | return cx23885_input_ir_start(kernel_ir->cx); | |
dbda8f70 AW |
227 | } |
228 | ||
229 | static void cx23885_input_ir_stop(struct cx23885_dev *dev) | |
230 | { | |
dbda8f70 AW |
231 | struct v4l2_subdev_ir_parameters params; |
232 | ||
233 | if (dev->sd_ir == NULL) | |
234 | return; | |
235 | ||
236 | /* | |
237 | * Stop the sd_ir subdevice from generating notifications and | |
238 | * scheduling work. | |
239 | * It is shutdown this way in order to mitigate a race with | |
240 | * cx23885_input_rx_work_handler() in the overrun case, which could | |
241 | * re-enable the subdevice. | |
242 | */ | |
243 | atomic_set(&dev->ir_input_stopping, 1); | |
244 | v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, ¶ms); | |
245 | while (params.shutdown == false) { | |
246 | params.enable = false; | |
247 | params.interrupt_enable = false; | |
248 | params.shutdown = true; | |
249 | v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, ¶ms); | |
250 | v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, ¶ms); | |
251 | } | |
43829731 TH |
252 | flush_work(&dev->cx25840_work); |
253 | flush_work(&dev->ir_rx_work); | |
254 | flush_work(&dev->ir_tx_work); | |
43c24078 | 255 | } |
dbda8f70 | 256 | |
d8b4b582 | 257 | static void cx23885_input_ir_close(struct rc_dev *rc) |
43c24078 | 258 | { |
d8b4b582 | 259 | struct cx23885_kernel_ir *kernel_ir = rc->priv; |
43c24078 AW |
260 | |
261 | if (kernel_ir->cx != NULL) | |
262 | cx23885_input_ir_stop(kernel_ir->cx); | |
dbda8f70 AW |
263 | } |
264 | ||
265 | int cx23885_input_init(struct cx23885_dev *dev) | |
266 | { | |
43c24078 | 267 | struct cx23885_kernel_ir *kernel_ir; |
d8b4b582 | 268 | struct rc_dev *rc; |
43c24078 AW |
269 | char *rc_map; |
270 | enum rc_driver_type driver_type; | |
271 | unsigned long allowed_protos; | |
272 | ||
dbda8f70 AW |
273 | int ret; |
274 | ||
275 | /* | |
276 | * If the IR device (hardware registers, chip, GPIO lines, etc.) isn't | |
277 | * encapsulated in a v4l2_subdev, then I'm not going to deal with it. | |
278 | */ | |
279 | if (dev->sd_ir == NULL) | |
280 | return -ENODEV; | |
281 | ||
282 | switch (dev->board) { | |
9b3d8ecc | 283 | case CX23885_BOARD_HAUPPAUGE_HVR1270: |
dbda8f70 | 284 | case CX23885_BOARD_HAUPPAUGE_HVR1850: |
7fec6fee | 285 | case CX23885_BOARD_HAUPPAUGE_HVR1290: |
98d109f9 AW |
286 | case CX23885_BOARD_HAUPPAUGE_HVR1250: |
287 | /* Integrated CX2388[58] IR controller */ | |
43c24078 | 288 | driver_type = RC_DRIVER_IR_RAW; |
c003ab1b | 289 | allowed_protos = RC_BIT_ALL; |
43c24078 | 290 | /* The grey Hauppauge RC-5 remote */ |
15195d3a | 291 | rc_map = RC_MAP_HAUPPAUGE; |
dbda8f70 | 292 | break; |
076f0e35 DB |
293 | case CX23885_BOARD_TERRATEC_CINERGY_T_PCIE_DUAL: |
294 | /* Integrated CX23885 IR controller */ | |
295 | driver_type = RC_DRIVER_IR_RAW; | |
c003ab1b | 296 | allowed_protos = RC_BIT_NEC; |
076f0e35 DB |
297 | /* The grey Terratec remote with orange buttons */ |
298 | rc_map = RC_MAP_NEC_TERRATEC_CINERGY_XS; | |
299 | break; | |
98d109f9 AW |
300 | case CX23885_BOARD_TEVII_S470: |
301 | /* Integrated CX23885 IR controller */ | |
302 | driver_type = RC_DRIVER_IR_RAW; | |
c003ab1b | 303 | allowed_protos = RC_BIT_ALL; |
98d109f9 AW |
304 | /* A guess at the remote */ |
305 | rc_map = RC_MAP_TEVII_NEC; | |
306 | break; | |
e5f670b7 AJD |
307 | case CX23885_BOARD_MYGICA_X8507: |
308 | /* Integrated CX23885 IR controller */ | |
309 | driver_type = RC_DRIVER_IR_RAW; | |
310 | allowed_protos = RC_BIT_ALL; | |
311 | /* A guess at the remote */ | |
312 | rc_map = RC_MAP_TOTAL_MEDIA_IN_HAND_02; | |
313 | break; | |
e6001482 LA |
314 | case CX23885_BOARD_TBS_6980: |
315 | case CX23885_BOARD_TBS_6981: | |
316 | /* Integrated CX23885 IR controller */ | |
317 | driver_type = RC_DRIVER_IR_RAW; | |
318 | allowed_protos = RC_BIT_ALL; | |
319 | /* A guess at the remote */ | |
320 | rc_map = RC_MAP_TBS_NEC; | |
321 | break; | |
d11a3835 | 322 | case CX23885_BOARD_DVBSKY_T9580: |
070e6661 | 323 | case CX23885_BOARD_DVBSKY_T980C: |
324 | case CX23885_BOARD_DVBSKY_S950C: | |
cba5480c | 325 | case CX23885_BOARD_DVBSKY_S950: |
c29d6a83 | 326 | case CX23885_BOARD_DVBSKY_S952: |
c02ef64a | 327 | case CX23885_BOARD_DVBSKY_T982: |
d11a3835 | 328 | /* Integrated CX23885 IR controller */ |
329 | driver_type = RC_DRIVER_IR_RAW; | |
330 | allowed_protos = RC_BIT_ALL; | |
331 | rc_map = RC_MAP_DVBSKY; | |
332 | break; | |
61b103e8 OS |
333 | case CX23885_BOARD_TT_CT2_4500_CI: |
334 | /* Integrated CX23885 IR controller */ | |
335 | driver_type = RC_DRIVER_IR_RAW; | |
336 | allowed_protos = RC_BIT_ALL; | |
337 | rc_map = RC_MAP_TT_1500; | |
338 | break; | |
43c24078 | 339 | default: |
dbda8f70 | 340 | return -ENODEV; |
dbda8f70 AW |
341 | } |
342 | ||
43c24078 AW |
343 | /* cx23885 board instance kernel IR state */ |
344 | kernel_ir = kzalloc(sizeof(struct cx23885_kernel_ir), GFP_KERNEL); | |
345 | if (kernel_ir == NULL) | |
346 | return -ENOMEM; | |
dbda8f70 | 347 | |
43c24078 AW |
348 | kernel_ir->cx = dev; |
349 | kernel_ir->name = kasprintf(GFP_KERNEL, "cx23885 IR (%s)", | |
350 | cx23885_boards[dev->board].name); | |
351 | kernel_ir->phys = kasprintf(GFP_KERNEL, "pci-%s/ir0", | |
352 | pci_name(dev->pci)); | |
dbda8f70 | 353 | |
43c24078 | 354 | /* input device */ |
d8b4b582 DH |
355 | rc = rc_allocate_device(); |
356 | if (!rc) { | |
43c24078 | 357 | ret = -ENOMEM; |
055cd556 | 358 | goto err_out_free; |
43c24078 | 359 | } |
055cd556 | 360 | |
d8b4b582 DH |
361 | kernel_ir->rc = rc; |
362 | rc->input_name = kernel_ir->name; | |
363 | rc->input_phys = kernel_ir->phys; | |
364 | rc->input_id.bustype = BUS_PCI; | |
365 | rc->input_id.version = 1; | |
dbda8f70 | 366 | if (dev->pci->subsystem_vendor) { |
d8b4b582 DH |
367 | rc->input_id.vendor = dev->pci->subsystem_vendor; |
368 | rc->input_id.product = dev->pci->subsystem_device; | |
dbda8f70 | 369 | } else { |
d8b4b582 DH |
370 | rc->input_id.vendor = dev->pci->vendor; |
371 | rc->input_id.product = dev->pci->device; | |
dbda8f70 | 372 | } |
d8b4b582 DH |
373 | rc->dev.parent = &dev->pci->dev; |
374 | rc->driver_type = driver_type; | |
c5540fbb | 375 | rc->allowed_protocols = allowed_protos; |
d8b4b582 DH |
376 | rc->priv = kernel_ir; |
377 | rc->open = cx23885_input_ir_open; | |
378 | rc->close = cx23885_input_ir_close; | |
379 | rc->map_name = rc_map; | |
380 | rc->driver_name = MODULE_NAME; | |
43c24078 AW |
381 | |
382 | /* Go */ | |
383 | dev->kernel_ir = kernel_ir; | |
d8b4b582 | 384 | ret = rc_register_device(rc); |
dbda8f70 AW |
385 | if (ret) |
386 | goto err_out_stop; | |
387 | ||
388 | return 0; | |
389 | ||
390 | err_out_stop: | |
391 | cx23885_input_ir_stop(dev); | |
43c24078 | 392 | dev->kernel_ir = NULL; |
d8b4b582 | 393 | rc_free_device(rc); |
dbda8f70 | 394 | err_out_free: |
43c24078 AW |
395 | kfree(kernel_ir->phys); |
396 | kfree(kernel_ir->name); | |
397 | kfree(kernel_ir); | |
dbda8f70 AW |
398 | return ret; |
399 | } | |
400 | ||
401 | void cx23885_input_fini(struct cx23885_dev *dev) | |
402 | { | |
403 | /* Always stop the IR hardware from generating interrupts */ | |
404 | cx23885_input_ir_stop(dev); | |
405 | ||
43c24078 | 406 | if (dev->kernel_ir == NULL) |
dbda8f70 | 407 | return; |
d8b4b582 | 408 | rc_unregister_device(dev->kernel_ir->rc); |
43c24078 AW |
409 | kfree(dev->kernel_ir->phys); |
410 | kfree(dev->kernel_ir->name); | |
411 | kfree(dev->kernel_ir); | |
412 | dev->kernel_ir = NULL; | |
dbda8f70 | 413 | } |