Commit | Line | Data |
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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. | |
31 | * | |
32 | * You should have received a copy of the GNU General Public License | |
33 | * along with this program; if not, write to the Free Software | |
34 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
35 | * 02110-1301, USA. | |
36 | */ | |
37 | ||
38 | #include <linux/input.h> | |
5a0e3ad6 | 39 | #include <linux/slab.h> |
43c24078 | 40 | #include <media/ir-core.h> |
dbda8f70 AW |
41 | #include <media/v4l2-subdev.h> |
42 | ||
43 | #include "cx23885.h" | |
44 | ||
727e625c MCC |
45 | #define MODULE_NAME "cx23885" |
46 | ||
43c24078 | 47 | static void convert_measurement(u32 x, struct ir_raw_event *y) |
dbda8f70 | 48 | { |
43c24078 AW |
49 | if (x == V4L2_SUBDEV_IR_PULSE_RX_SEQ_END) { |
50 | y->pulse = false; | |
51 | y->duration = V4L2_SUBDEV_IR_PULSE_MAX_WIDTH_NS; | |
dbda8f70 AW |
52 | return; |
53 | } | |
54 | ||
43c24078 AW |
55 | y->pulse = (x & V4L2_SUBDEV_IR_PULSE_LEVEL_MASK) ? true : false; |
56 | y->duration = x & V4L2_SUBDEV_IR_PULSE_MAX_WIDTH_NS; | |
dbda8f70 AW |
57 | } |
58 | ||
43c24078 AW |
59 | static void cx23885_input_process_measurements(struct cx23885_dev *dev, |
60 | bool overrun) | |
dbda8f70 | 61 | { |
43c24078 AW |
62 | struct cx23885_kernel_ir *kernel_ir = dev->kernel_ir; |
63 | struct ir_raw_event kernel_ir_event; | |
dbda8f70 | 64 | |
43c24078 AW |
65 | u32 sd_ir_data[64]; |
66 | ssize_t num; | |
dbda8f70 | 67 | int count, i; |
43c24078 | 68 | bool handle = false; |
dbda8f70 AW |
69 | |
70 | do { | |
43c24078 AW |
71 | num = 0; |
72 | v4l2_subdev_call(dev->sd_ir, ir, rx_read, (u8 *) sd_ir_data, | |
73 | sizeof(sd_ir_data), &num); | |
dbda8f70 AW |
74 | |
75 | count = num / sizeof(u32); | |
76 | ||
43c24078 AW |
77 | for (i = 0; i < count; i++) { |
78 | convert_measurement(sd_ir_data[i], &kernel_ir_event); | |
79 | ir_raw_event_store(kernel_ir->inp_dev, | |
80 | &kernel_ir_event); | |
81 | handle = true; | |
dbda8f70 | 82 | } |
dbda8f70 | 83 | } while (num != 0); |
43c24078 AW |
84 | |
85 | if (overrun) | |
86 | ir_raw_event_reset(kernel_ir->inp_dev); | |
87 | else if (handle) | |
88 | ir_raw_event_handle(kernel_ir->inp_dev); | |
dbda8f70 AW |
89 | } |
90 | ||
91 | void cx23885_input_rx_work_handler(struct cx23885_dev *dev, u32 events) | |
92 | { | |
93 | struct v4l2_subdev_ir_parameters params; | |
94 | int overrun, data_available; | |
95 | ||
96 | if (dev->sd_ir == NULL || events == 0) | |
97 | return; | |
98 | ||
99 | switch (dev->board) { | |
100 | case CX23885_BOARD_HAUPPAUGE_HVR1850: | |
7fec6fee | 101 | case CX23885_BOARD_HAUPPAUGE_HVR1290: |
dbda8f70 AW |
102 | /* |
103 | * The only board we handle right now. However other boards | |
104 | * using the CX2388x integrated IR controller should be similar | |
105 | */ | |
106 | break; | |
107 | default: | |
108 | return; | |
109 | } | |
110 | ||
111 | overrun = events & (V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN | | |
112 | V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN); | |
113 | ||
114 | data_available = events & (V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED | | |
115 | V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ); | |
116 | ||
117 | if (overrun) { | |
118 | /* If there was a FIFO overrun, stop the device */ | |
119 | v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, ¶ms); | |
120 | params.enable = false; | |
121 | /* Mitigate race with cx23885_input_ir_stop() */ | |
122 | params.shutdown = atomic_read(&dev->ir_input_stopping); | |
123 | v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, ¶ms); | |
124 | } | |
125 | ||
126 | if (data_available) | |
43c24078 | 127 | cx23885_input_process_measurements(dev, overrun); |
dbda8f70 AW |
128 | |
129 | if (overrun) { | |
130 | /* If there was a FIFO overrun, clear & restart the device */ | |
131 | params.enable = true; | |
132 | /* Mitigate race with cx23885_input_ir_stop() */ | |
133 | params.shutdown = atomic_read(&dev->ir_input_stopping); | |
134 | v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, ¶ms); | |
135 | } | |
136 | } | |
137 | ||
43c24078 | 138 | static int cx23885_input_ir_start(struct cx23885_dev *dev) |
dbda8f70 | 139 | { |
dbda8f70 AW |
140 | struct v4l2_subdev_ir_parameters params; |
141 | ||
142 | if (dev->sd_ir == NULL) | |
43c24078 | 143 | return -ENODEV; |
dbda8f70 AW |
144 | |
145 | atomic_set(&dev->ir_input_stopping, 0); | |
146 | ||
dbda8f70 AW |
147 | v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, ¶ms); |
148 | switch (dev->board) { | |
149 | case CX23885_BOARD_HAUPPAUGE_HVR1850: | |
7fec6fee | 150 | case CX23885_BOARD_HAUPPAUGE_HVR1290: |
dbda8f70 AW |
151 | /* |
152 | * The IR controller on this board only returns pulse widths. | |
153 | * Any other mode setting will fail to set up the device. | |
154 | */ | |
155 | params.mode = V4L2_SUBDEV_IR_MODE_PULSE_WIDTH; | |
156 | params.enable = true; | |
157 | params.interrupt_enable = true; | |
158 | params.shutdown = false; | |
159 | ||
160 | /* Setup for baseband compatible with both RC-5 and RC-6A */ | |
161 | params.modulation = false; | |
162 | /* RC-5: 2,222,222 ns = 1/36 kHz * 32 cycles * 2 marks * 1.25*/ | |
163 | /* RC-6A: 3,333,333 ns = 1/36 kHz * 16 cycles * 6 marks * 1.25*/ | |
164 | params.max_pulse_width = 3333333; /* ns */ | |
165 | /* RC-5: 666,667 ns = 1/36 kHz * 32 cycles * 1 mark * 0.75 */ | |
166 | /* RC-6A: 333,333 ns = 1/36 kHz * 16 cycles * 1 mark * 0.75 */ | |
167 | params.noise_filter_min_width = 333333; /* ns */ | |
168 | /* | |
169 | * This board has inverted receive sense: | |
170 | * mark is received as low logic level; | |
171 | * falling edges are detected as rising edges; etc. | |
172 | */ | |
5a28d9a3 | 173 | params.invert_level = true; |
dbda8f70 AW |
174 | break; |
175 | } | |
176 | v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, ¶ms); | |
43c24078 AW |
177 | return 0; |
178 | } | |
179 | ||
180 | static int cx23885_input_ir_open(void *priv) | |
181 | { | |
182 | struct cx23885_kernel_ir *kernel_ir = priv; | |
183 | ||
184 | if (kernel_ir->cx == NULL) | |
185 | return -ENODEV; | |
186 | ||
187 | return cx23885_input_ir_start(kernel_ir->cx); | |
dbda8f70 AW |
188 | } |
189 | ||
190 | static void cx23885_input_ir_stop(struct cx23885_dev *dev) | |
191 | { | |
dbda8f70 AW |
192 | struct v4l2_subdev_ir_parameters params; |
193 | ||
194 | if (dev->sd_ir == NULL) | |
195 | return; | |
196 | ||
197 | /* | |
198 | * Stop the sd_ir subdevice from generating notifications and | |
199 | * scheduling work. | |
200 | * It is shutdown this way in order to mitigate a race with | |
201 | * cx23885_input_rx_work_handler() in the overrun case, which could | |
202 | * re-enable the subdevice. | |
203 | */ | |
204 | atomic_set(&dev->ir_input_stopping, 1); | |
205 | v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, ¶ms); | |
206 | while (params.shutdown == false) { | |
207 | params.enable = false; | |
208 | params.interrupt_enable = false; | |
209 | params.shutdown = true; | |
210 | v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, ¶ms); | |
211 | v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, ¶ms); | |
212 | } | |
213 | ||
214 | flush_scheduled_work(); | |
43c24078 | 215 | } |
dbda8f70 | 216 | |
43c24078 AW |
217 | static void cx23885_input_ir_close(void *priv) |
218 | { | |
219 | struct cx23885_kernel_ir *kernel_ir = priv; | |
220 | ||
221 | if (kernel_ir->cx != NULL) | |
222 | cx23885_input_ir_stop(kernel_ir->cx); | |
dbda8f70 AW |
223 | } |
224 | ||
225 | int cx23885_input_init(struct cx23885_dev *dev) | |
226 | { | |
43c24078 AW |
227 | struct cx23885_kernel_ir *kernel_ir; |
228 | struct input_dev *inp_dev; | |
229 | struct ir_dev_props *props; | |
230 | ||
231 | char *rc_map; | |
232 | enum rc_driver_type driver_type; | |
233 | unsigned long allowed_protos; | |
234 | ||
dbda8f70 AW |
235 | int ret; |
236 | ||
237 | /* | |
238 | * If the IR device (hardware registers, chip, GPIO lines, etc.) isn't | |
239 | * encapsulated in a v4l2_subdev, then I'm not going to deal with it. | |
240 | */ | |
241 | if (dev->sd_ir == NULL) | |
242 | return -ENODEV; | |
243 | ||
244 | switch (dev->board) { | |
245 | case CX23885_BOARD_HAUPPAUGE_HVR1850: | |
7fec6fee | 246 | case CX23885_BOARD_HAUPPAUGE_HVR1290: |
43c24078 AW |
247 | /* Integrated CX23888 IR controller */ |
248 | driver_type = RC_DRIVER_IR_RAW; | |
249 | allowed_protos = IR_TYPE_ALL; | |
250 | /* The grey Hauppauge RC-5 remote */ | |
251 | rc_map = RC_MAP_RC5_HAUPPAUGE_NEW; | |
dbda8f70 | 252 | break; |
43c24078 | 253 | default: |
dbda8f70 | 254 | return -ENODEV; |
dbda8f70 AW |
255 | } |
256 | ||
43c24078 AW |
257 | /* cx23885 board instance kernel IR state */ |
258 | kernel_ir = kzalloc(sizeof(struct cx23885_kernel_ir), GFP_KERNEL); | |
259 | if (kernel_ir == NULL) | |
260 | return -ENOMEM; | |
dbda8f70 | 261 | |
43c24078 AW |
262 | kernel_ir->cx = dev; |
263 | kernel_ir->name = kasprintf(GFP_KERNEL, "cx23885 IR (%s)", | |
264 | cx23885_boards[dev->board].name); | |
265 | kernel_ir->phys = kasprintf(GFP_KERNEL, "pci-%s/ir0", | |
266 | pci_name(dev->pci)); | |
dbda8f70 | 267 | |
43c24078 AW |
268 | /* input device */ |
269 | inp_dev = input_allocate_device(); | |
270 | if (inp_dev == NULL) { | |
271 | ret = -ENOMEM; | |
055cd556 | 272 | goto err_out_free; |
43c24078 | 273 | } |
055cd556 | 274 | |
43c24078 AW |
275 | kernel_ir->inp_dev = inp_dev; |
276 | inp_dev->name = kernel_ir->name; | |
277 | inp_dev->phys = kernel_ir->phys; | |
278 | inp_dev->id.bustype = BUS_PCI; | |
279 | inp_dev->id.version = 1; | |
dbda8f70 | 280 | if (dev->pci->subsystem_vendor) { |
43c24078 AW |
281 | inp_dev->id.vendor = dev->pci->subsystem_vendor; |
282 | inp_dev->id.product = dev->pci->subsystem_device; | |
dbda8f70 | 283 | } else { |
43c24078 AW |
284 | inp_dev->id.vendor = dev->pci->vendor; |
285 | inp_dev->id.product = dev->pci->device; | |
dbda8f70 | 286 | } |
43c24078 AW |
287 | inp_dev->dev.parent = &dev->pci->dev; |
288 | ||
289 | /* kernel ir device properties */ | |
290 | props = &kernel_ir->props; | |
291 | props->driver_type = driver_type; | |
292 | props->allowed_protos = allowed_protos; | |
293 | props->priv = kernel_ir; | |
294 | props->open = cx23885_input_ir_open; | |
295 | props->close = cx23885_input_ir_close; | |
296 | ||
297 | /* Go */ | |
298 | dev->kernel_ir = kernel_ir; | |
299 | ret = ir_input_register(inp_dev, rc_map, props, MODULE_NAME); | |
dbda8f70 AW |
300 | if (ret) |
301 | goto err_out_stop; | |
302 | ||
303 | return 0; | |
304 | ||
305 | err_out_stop: | |
306 | cx23885_input_ir_stop(dev); | |
43c24078 AW |
307 | dev->kernel_ir = NULL; |
308 | /* TODO: double check clean-up of kernel_ir->inp_dev */ | |
dbda8f70 | 309 | err_out_free: |
43c24078 AW |
310 | kfree(kernel_ir->phys); |
311 | kfree(kernel_ir->name); | |
312 | kfree(kernel_ir); | |
dbda8f70 AW |
313 | return ret; |
314 | } | |
315 | ||
316 | void cx23885_input_fini(struct cx23885_dev *dev) | |
317 | { | |
318 | /* Always stop the IR hardware from generating interrupts */ | |
319 | cx23885_input_ir_stop(dev); | |
320 | ||
43c24078 | 321 | if (dev->kernel_ir == NULL) |
dbda8f70 | 322 | return; |
43c24078 AW |
323 | ir_input_unregister(dev->kernel_ir->inp_dev); |
324 | kfree(dev->kernel_ir->phys); | |
325 | kfree(dev->kernel_ir->name); | |
326 | kfree(dev->kernel_ir); | |
327 | dev->kernel_ir = NULL; | |
dbda8f70 | 328 | } |