diff options
author | Jonathan Herman <hermanjl@cs.unc.edu> | 2013-01-22 10:38:37 -0500 |
---|---|---|
committer | Jonathan Herman <hermanjl@cs.unc.edu> | 2013-01-22 10:38:37 -0500 |
commit | fcc9d2e5a6c89d22b8b773a64fb4ad21ac318446 (patch) | |
tree | a57612d1888735a2ec7972891b68c1ac5ec8faea /drivers/media/video/adv7180.c | |
parent | 8dea78da5cee153b8af9c07a2745f6c55057fe12 (diff) |
Diffstat (limited to 'drivers/media/video/adv7180.c')
-rw-r--r-- | drivers/media/video/adv7180.c | 463 |
1 files changed, 463 insertions, 0 deletions
diff --git a/drivers/media/video/adv7180.c b/drivers/media/video/adv7180.c new file mode 100644 index 00000000000..d2138d06bca --- /dev/null +++ b/drivers/media/video/adv7180.c | |||
@@ -0,0 +1,463 @@ | |||
1 | /* | ||
2 | * adv7180.c Analog Devices ADV7180 video decoder driver | ||
3 | * Copyright (c) 2009 Intel Corporation | ||
4 | * | ||
5 | * This program is free software; you can redistribute it and/or modify | ||
6 | * it under the terms of the GNU General Public License version 2 as | ||
7 | * published by the Free Software Foundation. | ||
8 | * | ||
9 | * This program is distributed in the hope that it will be useful, | ||
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
12 | * GNU General Public License for more details. | ||
13 | * | ||
14 | * You should have received a copy of the GNU General Public License | ||
15 | * along with this program; if not, write to the Free Software | ||
16 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | ||
17 | */ | ||
18 | |||
19 | #include <linux/module.h> | ||
20 | #include <linux/init.h> | ||
21 | #include <linux/errno.h> | ||
22 | #include <linux/kernel.h> | ||
23 | #include <linux/interrupt.h> | ||
24 | #include <linux/i2c.h> | ||
25 | #include <linux/slab.h> | ||
26 | #include <media/v4l2-ioctl.h> | ||
27 | #include <linux/videodev2.h> | ||
28 | #include <media/v4l2-device.h> | ||
29 | #include <media/v4l2-chip-ident.h> | ||
30 | #include <linux/mutex.h> | ||
31 | |||
32 | #define DRIVER_NAME "adv7180" | ||
33 | |||
34 | #define ADV7180_INPUT_CONTROL_REG 0x00 | ||
35 | #define ADV7180_INPUT_CONTROL_AD_PAL_BG_NTSC_J_SECAM 0x00 | ||
36 | #define ADV7180_INPUT_CONTROL_AD_PAL_BG_NTSC_J_SECAM_PED 0x10 | ||
37 | #define ADV7180_INPUT_CONTROL_AD_PAL_N_NTSC_J_SECAM 0x20 | ||
38 | #define ADV7180_INPUT_CONTROL_AD_PAL_N_NTSC_M_SECAM 0x30 | ||
39 | #define ADV7180_INPUT_CONTROL_NTSC_J 0x40 | ||
40 | #define ADV7180_INPUT_CONTROL_NTSC_M 0x50 | ||
41 | #define ADV7180_INPUT_CONTROL_PAL60 0x60 | ||
42 | #define ADV7180_INPUT_CONTROL_NTSC_443 0x70 | ||
43 | #define ADV7180_INPUT_CONTROL_PAL_BG 0x80 | ||
44 | #define ADV7180_INPUT_CONTROL_PAL_N 0x90 | ||
45 | #define ADV7180_INPUT_CONTROL_PAL_M 0xa0 | ||
46 | #define ADV7180_INPUT_CONTROL_PAL_M_PED 0xb0 | ||
47 | #define ADV7180_INPUT_CONTROL_PAL_COMB_N 0xc0 | ||
48 | #define ADV7180_INPUT_CONTROL_PAL_COMB_N_PED 0xd0 | ||
49 | #define ADV7180_INPUT_CONTROL_PAL_SECAM 0xe0 | ||
50 | #define ADV7180_INPUT_CONTROL_PAL_SECAM_PED 0xf0 | ||
51 | |||
52 | #define ADV7180_EXTENDED_OUTPUT_CONTROL_REG 0x04 | ||
53 | #define ADV7180_EXTENDED_OUTPUT_CONTROL_NTSCDIS 0xC5 | ||
54 | |||
55 | #define ADV7180_AUTODETECT_ENABLE_REG 0x07 | ||
56 | #define ADV7180_AUTODETECT_DEFAULT 0x7f | ||
57 | |||
58 | #define ADV7180_ADI_CTRL_REG 0x0e | ||
59 | #define ADV7180_ADI_CTRL_IRQ_SPACE 0x20 | ||
60 | |||
61 | #define ADV7180_STATUS1_REG 0x10 | ||
62 | #define ADV7180_STATUS1_IN_LOCK 0x01 | ||
63 | #define ADV7180_STATUS1_AUTOD_MASK 0x70 | ||
64 | #define ADV7180_STATUS1_AUTOD_NTSM_M_J 0x00 | ||
65 | #define ADV7180_STATUS1_AUTOD_NTSC_4_43 0x10 | ||
66 | #define ADV7180_STATUS1_AUTOD_PAL_M 0x20 | ||
67 | #define ADV7180_STATUS1_AUTOD_PAL_60 0x30 | ||
68 | #define ADV7180_STATUS1_AUTOD_PAL_B_G 0x40 | ||
69 | #define ADV7180_STATUS1_AUTOD_SECAM 0x50 | ||
70 | #define ADV7180_STATUS1_AUTOD_PAL_COMB 0x60 | ||
71 | #define ADV7180_STATUS1_AUTOD_SECAM_525 0x70 | ||
72 | |||
73 | #define ADV7180_IDENT_REG 0x11 | ||
74 | #define ADV7180_ID_7180 0x18 | ||
75 | |||
76 | #define ADV7180_ICONF1_ADI 0x40 | ||
77 | #define ADV7180_ICONF1_ACTIVE_LOW 0x01 | ||
78 | #define ADV7180_ICONF1_PSYNC_ONLY 0x10 | ||
79 | #define ADV7180_ICONF1_ACTIVE_TO_CLR 0xC0 | ||
80 | |||
81 | #define ADV7180_IRQ1_LOCK 0x01 | ||
82 | #define ADV7180_IRQ1_UNLOCK 0x02 | ||
83 | #define ADV7180_ISR1_ADI 0x42 | ||
84 | #define ADV7180_ICR1_ADI 0x43 | ||
85 | #define ADV7180_IMR1_ADI 0x44 | ||
86 | #define ADV7180_IMR2_ADI 0x48 | ||
87 | #define ADV7180_IRQ3_AD_CHANGE 0x08 | ||
88 | #define ADV7180_ISR3_ADI 0x4A | ||
89 | #define ADV7180_ICR3_ADI 0x4B | ||
90 | #define ADV7180_IMR3_ADI 0x4C | ||
91 | #define ADV7180_IMR4_ADI 0x50 | ||
92 | |||
93 | struct adv7180_state { | ||
94 | struct v4l2_subdev sd; | ||
95 | struct work_struct work; | ||
96 | struct mutex mutex; /* mutual excl. when accessing chip */ | ||
97 | int irq; | ||
98 | v4l2_std_id curr_norm; | ||
99 | bool autodetect; | ||
100 | }; | ||
101 | |||
102 | static v4l2_std_id adv7180_std_to_v4l2(u8 status1) | ||
103 | { | ||
104 | switch (status1 & ADV7180_STATUS1_AUTOD_MASK) { | ||
105 | case ADV7180_STATUS1_AUTOD_NTSM_M_J: | ||
106 | return V4L2_STD_NTSC; | ||
107 | case ADV7180_STATUS1_AUTOD_NTSC_4_43: | ||
108 | return V4L2_STD_NTSC_443; | ||
109 | case ADV7180_STATUS1_AUTOD_PAL_M: | ||
110 | return V4L2_STD_PAL_M; | ||
111 | case ADV7180_STATUS1_AUTOD_PAL_60: | ||
112 | return V4L2_STD_PAL_60; | ||
113 | case ADV7180_STATUS1_AUTOD_PAL_B_G: | ||
114 | return V4L2_STD_PAL; | ||
115 | case ADV7180_STATUS1_AUTOD_SECAM: | ||
116 | return V4L2_STD_SECAM; | ||
117 | case ADV7180_STATUS1_AUTOD_PAL_COMB: | ||
118 | return V4L2_STD_PAL_Nc | V4L2_STD_PAL_N; | ||
119 | case ADV7180_STATUS1_AUTOD_SECAM_525: | ||
120 | return V4L2_STD_SECAM; | ||
121 | default: | ||
122 | return V4L2_STD_UNKNOWN; | ||
123 | } | ||
124 | } | ||
125 | |||
126 | static int v4l2_std_to_adv7180(v4l2_std_id std) | ||
127 | { | ||
128 | if (std == V4L2_STD_PAL_60) | ||
129 | return ADV7180_INPUT_CONTROL_PAL60; | ||
130 | if (std == V4L2_STD_NTSC_443) | ||
131 | return ADV7180_INPUT_CONTROL_NTSC_443; | ||
132 | if (std == V4L2_STD_PAL_N) | ||
133 | return ADV7180_INPUT_CONTROL_PAL_N; | ||
134 | if (std == V4L2_STD_PAL_M) | ||
135 | return ADV7180_INPUT_CONTROL_PAL_M; | ||
136 | if (std == V4L2_STD_PAL_Nc) | ||
137 | return ADV7180_INPUT_CONTROL_PAL_COMB_N; | ||
138 | |||
139 | if (std & V4L2_STD_PAL) | ||
140 | return ADV7180_INPUT_CONTROL_PAL_BG; | ||
141 | if (std & V4L2_STD_NTSC) | ||
142 | return ADV7180_INPUT_CONTROL_NTSC_M; | ||
143 | if (std & V4L2_STD_SECAM) | ||
144 | return ADV7180_INPUT_CONTROL_PAL_SECAM; | ||
145 | |||
146 | return -EINVAL; | ||
147 | } | ||
148 | |||
149 | static u32 adv7180_status_to_v4l2(u8 status1) | ||
150 | { | ||
151 | if (!(status1 & ADV7180_STATUS1_IN_LOCK)) | ||
152 | return V4L2_IN_ST_NO_SIGNAL; | ||
153 | |||
154 | return 0; | ||
155 | } | ||
156 | |||
157 | static int __adv7180_status(struct i2c_client *client, u32 *status, | ||
158 | v4l2_std_id *std) | ||
159 | { | ||
160 | int status1 = i2c_smbus_read_byte_data(client, ADV7180_STATUS1_REG); | ||
161 | |||
162 | if (status1 < 0) | ||
163 | return status1; | ||
164 | |||
165 | if (status) | ||
166 | *status = adv7180_status_to_v4l2(status1); | ||
167 | if (std) | ||
168 | *std = adv7180_std_to_v4l2(status1); | ||
169 | |||
170 | return 0; | ||
171 | } | ||
172 | |||
173 | static inline struct adv7180_state *to_state(struct v4l2_subdev *sd) | ||
174 | { | ||
175 | return container_of(sd, struct adv7180_state, sd); | ||
176 | } | ||
177 | |||
178 | static int adv7180_querystd(struct v4l2_subdev *sd, v4l2_std_id *std) | ||
179 | { | ||
180 | struct adv7180_state *state = to_state(sd); | ||
181 | int err = mutex_lock_interruptible(&state->mutex); | ||
182 | if (err) | ||
183 | return err; | ||
184 | |||
185 | /* when we are interrupt driven we know the state */ | ||
186 | if (!state->autodetect || state->irq > 0) | ||
187 | *std = state->curr_norm; | ||
188 | else | ||
189 | err = __adv7180_status(v4l2_get_subdevdata(sd), NULL, std); | ||
190 | |||
191 | mutex_unlock(&state->mutex); | ||
192 | return err; | ||
193 | } | ||
194 | |||
195 | static int adv7180_g_input_status(struct v4l2_subdev *sd, u32 *status) | ||
196 | { | ||
197 | struct adv7180_state *state = to_state(sd); | ||
198 | int ret = mutex_lock_interruptible(&state->mutex); | ||
199 | if (ret) | ||
200 | return ret; | ||
201 | |||
202 | ret = __adv7180_status(v4l2_get_subdevdata(sd), status, NULL); | ||
203 | mutex_unlock(&state->mutex); | ||
204 | return ret; | ||
205 | } | ||
206 | |||
207 | static int adv7180_g_chip_ident(struct v4l2_subdev *sd, | ||
208 | struct v4l2_dbg_chip_ident *chip) | ||
209 | { | ||
210 | struct i2c_client *client = v4l2_get_subdevdata(sd); | ||
211 | |||
212 | return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_ADV7180, 0); | ||
213 | } | ||
214 | |||
215 | static int adv7180_s_std(struct v4l2_subdev *sd, v4l2_std_id std) | ||
216 | { | ||
217 | struct adv7180_state *state = to_state(sd); | ||
218 | struct i2c_client *client = v4l2_get_subdevdata(sd); | ||
219 | int ret = mutex_lock_interruptible(&state->mutex); | ||
220 | if (ret) | ||
221 | return ret; | ||
222 | |||
223 | /* all standards -> autodetect */ | ||
224 | if (std == V4L2_STD_ALL) { | ||
225 | ret = i2c_smbus_write_byte_data(client, | ||
226 | ADV7180_INPUT_CONTROL_REG, | ||
227 | ADV7180_INPUT_CONTROL_AD_PAL_BG_NTSC_J_SECAM); | ||
228 | if (ret < 0) | ||
229 | goto out; | ||
230 | |||
231 | __adv7180_status(client, NULL, &state->curr_norm); | ||
232 | state->autodetect = true; | ||
233 | } else { | ||
234 | ret = v4l2_std_to_adv7180(std); | ||
235 | if (ret < 0) | ||
236 | goto out; | ||
237 | |||
238 | ret = i2c_smbus_write_byte_data(client, | ||
239 | ADV7180_INPUT_CONTROL_REG, ret); | ||
240 | if (ret < 0) | ||
241 | goto out; | ||
242 | |||
243 | state->curr_norm = std; | ||
244 | state->autodetect = false; | ||
245 | } | ||
246 | ret = 0; | ||
247 | out: | ||
248 | mutex_unlock(&state->mutex); | ||
249 | return ret; | ||
250 | } | ||
251 | |||
252 | static const struct v4l2_subdev_video_ops adv7180_video_ops = { | ||
253 | .querystd = adv7180_querystd, | ||
254 | .g_input_status = adv7180_g_input_status, | ||
255 | }; | ||
256 | |||
257 | static const struct v4l2_subdev_core_ops adv7180_core_ops = { | ||
258 | .g_chip_ident = adv7180_g_chip_ident, | ||
259 | .s_std = adv7180_s_std, | ||
260 | }; | ||
261 | |||
262 | static const struct v4l2_subdev_ops adv7180_ops = { | ||
263 | .core = &adv7180_core_ops, | ||
264 | .video = &adv7180_video_ops, | ||
265 | }; | ||
266 | |||
267 | static void adv7180_work(struct work_struct *work) | ||
268 | { | ||
269 | struct adv7180_state *state = container_of(work, struct adv7180_state, | ||
270 | work); | ||
271 | struct i2c_client *client = v4l2_get_subdevdata(&state->sd); | ||
272 | u8 isr3; | ||
273 | |||
274 | mutex_lock(&state->mutex); | ||
275 | i2c_smbus_write_byte_data(client, ADV7180_ADI_CTRL_REG, | ||
276 | ADV7180_ADI_CTRL_IRQ_SPACE); | ||
277 | isr3 = i2c_smbus_read_byte_data(client, ADV7180_ISR3_ADI); | ||
278 | /* clear */ | ||
279 | i2c_smbus_write_byte_data(client, ADV7180_ICR3_ADI, isr3); | ||
280 | i2c_smbus_write_byte_data(client, ADV7180_ADI_CTRL_REG, 0); | ||
281 | |||
282 | if (isr3 & ADV7180_IRQ3_AD_CHANGE && state->autodetect) | ||
283 | __adv7180_status(client, NULL, &state->curr_norm); | ||
284 | mutex_unlock(&state->mutex); | ||
285 | |||
286 | enable_irq(state->irq); | ||
287 | } | ||
288 | |||
289 | static irqreturn_t adv7180_irq(int irq, void *devid) | ||
290 | { | ||
291 | struct adv7180_state *state = devid; | ||
292 | |||
293 | schedule_work(&state->work); | ||
294 | |||
295 | disable_irq_nosync(state->irq); | ||
296 | |||
297 | return IRQ_HANDLED; | ||
298 | } | ||
299 | |||
300 | /* | ||
301 | * Generic i2c probe | ||
302 | * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1' | ||
303 | */ | ||
304 | |||
305 | static __devinit int adv7180_probe(struct i2c_client *client, | ||
306 | const struct i2c_device_id *id) | ||
307 | { | ||
308 | struct adv7180_state *state; | ||
309 | struct v4l2_subdev *sd; | ||
310 | int ret; | ||
311 | |||
312 | /* Check if the adapter supports the needed features */ | ||
313 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | ||
314 | return -EIO; | ||
315 | |||
316 | v4l_info(client, "chip found @ 0x%02x (%s)\n", | ||
317 | client->addr << 1, client->adapter->name); | ||
318 | |||
319 | state = kzalloc(sizeof(struct adv7180_state), GFP_KERNEL); | ||
320 | if (state == NULL) { | ||
321 | ret = -ENOMEM; | ||
322 | goto err; | ||
323 | } | ||
324 | |||
325 | state->irq = client->irq; | ||
326 | INIT_WORK(&state->work, adv7180_work); | ||
327 | mutex_init(&state->mutex); | ||
328 | state->autodetect = true; | ||
329 | sd = &state->sd; | ||
330 | v4l2_i2c_subdev_init(sd, client, &adv7180_ops); | ||
331 | |||
332 | /* Initialize adv7180 */ | ||
333 | /* Enable autodetection */ | ||
334 | ret = i2c_smbus_write_byte_data(client, ADV7180_INPUT_CONTROL_REG, | ||
335 | ADV7180_INPUT_CONTROL_AD_PAL_BG_NTSC_J_SECAM); | ||
336 | if (ret < 0) | ||
337 | goto err_unreg_subdev; | ||
338 | |||
339 | ret = i2c_smbus_write_byte_data(client, ADV7180_AUTODETECT_ENABLE_REG, | ||
340 | ADV7180_AUTODETECT_DEFAULT); | ||
341 | if (ret < 0) | ||
342 | goto err_unreg_subdev; | ||
343 | |||
344 | /* ITU-R BT.656-4 compatible */ | ||
345 | ret = i2c_smbus_write_byte_data(client, | ||
346 | ADV7180_EXTENDED_OUTPUT_CONTROL_REG, | ||
347 | ADV7180_EXTENDED_OUTPUT_CONTROL_NTSCDIS); | ||
348 | if (ret < 0) | ||
349 | goto err_unreg_subdev; | ||
350 | |||
351 | /* read current norm */ | ||
352 | __adv7180_status(client, NULL, &state->curr_norm); | ||
353 | |||
354 | /* register for interrupts */ | ||
355 | if (state->irq > 0) { | ||
356 | ret = request_irq(state->irq, adv7180_irq, 0, DRIVER_NAME, | ||
357 | state); | ||
358 | if (ret) | ||
359 | goto err_unreg_subdev; | ||
360 | |||
361 | ret = i2c_smbus_write_byte_data(client, ADV7180_ADI_CTRL_REG, | ||
362 | ADV7180_ADI_CTRL_IRQ_SPACE); | ||
363 | if (ret < 0) | ||
364 | goto err_unreg_subdev; | ||
365 | |||
366 | /* config the Interrupt pin to be active low */ | ||
367 | ret = i2c_smbus_write_byte_data(client, ADV7180_ICONF1_ADI, | ||
368 | ADV7180_ICONF1_ACTIVE_LOW | ADV7180_ICONF1_PSYNC_ONLY); | ||
369 | if (ret < 0) | ||
370 | goto err_unreg_subdev; | ||
371 | |||
372 | ret = i2c_smbus_write_byte_data(client, ADV7180_IMR1_ADI, 0); | ||
373 | if (ret < 0) | ||
374 | goto err_unreg_subdev; | ||
375 | |||
376 | ret = i2c_smbus_write_byte_data(client, ADV7180_IMR2_ADI, 0); | ||
377 | if (ret < 0) | ||
378 | goto err_unreg_subdev; | ||
379 | |||
380 | /* enable AD change interrupts interrupts */ | ||
381 | ret = i2c_smbus_write_byte_data(client, ADV7180_IMR3_ADI, | ||
382 | ADV7180_IRQ3_AD_CHANGE); | ||
383 | if (ret < 0) | ||
384 | goto err_unreg_subdev; | ||
385 | |||
386 | ret = i2c_smbus_write_byte_data(client, ADV7180_IMR4_ADI, 0); | ||
387 | if (ret < 0) | ||
388 | goto err_unreg_subdev; | ||
389 | |||
390 | ret = i2c_smbus_write_byte_data(client, ADV7180_ADI_CTRL_REG, | ||
391 | 0); | ||
392 | if (ret < 0) | ||
393 | goto err_unreg_subdev; | ||
394 | } | ||
395 | |||
396 | return 0; | ||
397 | |||
398 | err_unreg_subdev: | ||
399 | mutex_destroy(&state->mutex); | ||
400 | v4l2_device_unregister_subdev(sd); | ||
401 | kfree(state); | ||
402 | err: | ||
403 | printk(KERN_ERR DRIVER_NAME ": Failed to probe: %d\n", ret); | ||
404 | return ret; | ||
405 | } | ||
406 | |||
407 | static __devexit int adv7180_remove(struct i2c_client *client) | ||
408 | { | ||
409 | struct v4l2_subdev *sd = i2c_get_clientdata(client); | ||
410 | struct adv7180_state *state = to_state(sd); | ||
411 | |||
412 | if (state->irq > 0) { | ||
413 | free_irq(client->irq, state); | ||
414 | if (cancel_work_sync(&state->work)) { | ||
415 | /* | ||
416 | * Work was pending, therefore we need to enable | ||
417 | * IRQ here to balance the disable_irq() done in the | ||
418 | * interrupt handler. | ||
419 | */ | ||
420 | enable_irq(state->irq); | ||
421 | } | ||
422 | } | ||
423 | |||
424 | mutex_destroy(&state->mutex); | ||
425 | v4l2_device_unregister_subdev(sd); | ||
426 | kfree(to_state(sd)); | ||
427 | return 0; | ||
428 | } | ||
429 | |||
430 | static const struct i2c_device_id adv7180_id[] = { | ||
431 | {DRIVER_NAME, 0}, | ||
432 | {}, | ||
433 | }; | ||
434 | |||
435 | MODULE_DEVICE_TABLE(i2c, adv7180_id); | ||
436 | |||
437 | static struct i2c_driver adv7180_driver = { | ||
438 | .driver = { | ||
439 | .owner = THIS_MODULE, | ||
440 | .name = DRIVER_NAME, | ||
441 | }, | ||
442 | .probe = adv7180_probe, | ||
443 | .remove = __devexit_p(adv7180_remove), | ||
444 | .id_table = adv7180_id, | ||
445 | }; | ||
446 | |||
447 | static __init int adv7180_init(void) | ||
448 | { | ||
449 | return i2c_add_driver(&adv7180_driver); | ||
450 | } | ||
451 | |||
452 | static __exit void adv7180_exit(void) | ||
453 | { | ||
454 | i2c_del_driver(&adv7180_driver); | ||
455 | } | ||
456 | |||
457 | module_init(adv7180_init); | ||
458 | module_exit(adv7180_exit); | ||
459 | |||
460 | MODULE_DESCRIPTION("Analog Devices ADV7180 video decoder driver"); | ||
461 | MODULE_AUTHOR("Mocean Laboratories"); | ||
462 | MODULE_LICENSE("GPL v2"); | ||
463 | |||