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V4L/DVB (12506): soc-camera: convert to platform device
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / media / video / mt9v022.c
CommitLineData
7397bfbe
GL		 1/*
2 * Driver for MT9V022 CMOS Image Sensor from Micron
3 *
4 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#include <linux/videodev2.h>
12#include <linux/slab.h>
13#include <linux/i2c.h>
14#include <linux/delay.h>
15#include <linux/log2.h>
16
17#include <media/v4l2-common.h>
18#include <media/v4l2-chip-ident.h>
19#include <media/soc_camera.h>
20
7397bfbe
GL		 21/* mt9v022 i2c address 0x48, 0x4c, 0x58, 0x5c
22 * The platform has to define i2c_board_info
23 * and call i2c_register_board_info() */
24
25static char *sensor_type;
26module_param(sensor_type, charp, S_IRUGO);
61a2d07d 27MODULE_PARM_DESC(sensor_type, "Sensor type: \"colour\" or \"monochrome\"");
7397bfbe
GL		 28
29/* mt9v022 selected register addresses */
30#define MT9V022_CHIP_VERSION 0x00
31#define MT9V022_COLUMN_START 0x01
32#define MT9V022_ROW_START 0x02
33#define MT9V022_WINDOW_HEIGHT 0x03
34#define MT9V022_WINDOW_WIDTH 0x04
35#define MT9V022_HORIZONTAL_BLANKING 0x05
36#define MT9V022_VERTICAL_BLANKING 0x06
37#define MT9V022_CHIP_CONTROL 0x07
38#define MT9V022_SHUTTER_WIDTH1 0x08
39#define MT9V022_SHUTTER_WIDTH2 0x09
40#define MT9V022_SHUTTER_WIDTH_CTRL 0x0a
41#define MT9V022_TOTAL_SHUTTER_WIDTH 0x0b
42#define MT9V022_RESET 0x0c
43#define MT9V022_READ_MODE 0x0d
44#define MT9V022_MONITOR_MODE 0x0e
45#define MT9V022_PIXEL_OPERATION_MODE 0x0f
46#define MT9V022_LED_OUT_CONTROL 0x1b
47#define MT9V022_ADC_MODE_CONTROL 0x1c
48#define MT9V022_ANALOG_GAIN 0x34
49#define MT9V022_BLACK_LEVEL_CALIB_CTRL 0x47
50#define MT9V022_PIXCLK_FV_LV 0x74
51#define MT9V022_DIGITAL_TEST_PATTERN 0x7f
52#define MT9V022_AEC_AGC_ENABLE 0xAF
53#define MT9V022_MAX_TOTAL_SHUTTER_WIDTH 0xBD
54
55/* Progressive scan, master, defaults */
56#define MT9V022_CHIP_CONTROL_DEFAULT 0x188
57
bb55de3b
GL		 58static const struct soc_camera_data_format mt9v022_colour_formats[] = {
59 /* Order important: first natively supported,
60 * second supported with a GPIO extender */
7397bfbe 61 {
bb55de3b 62 .name = "Bayer (sRGB) 10 bit",
7397bfbe
GL		 63 .depth = 10,
64 .fourcc = V4L2_PIX_FMT_SBGGR16,
65 .colorspace = V4L2_COLORSPACE_SRGB,
66 }, {
bb55de3b
GL		 67 .name = "Bayer (sRGB) 8 bit",
68 .depth = 8,
69 .fourcc = V4L2_PIX_FMT_SBGGR8,
70 .colorspace = V4L2_COLORSPACE_SRGB,
71 }
72};
73
74static const struct soc_camera_data_format mt9v022_monochrome_formats[] = {
75 /* Order important - see above */
76 {
7397bfbe
GL		 77 .name = "Monochrome 10 bit",
78 .depth = 10,
79 .fourcc = V4L2_PIX_FMT_Y16,
80 }, {
81 .name = "Monochrome 8 bit",
82 .depth = 8,
83 .fourcc = V4L2_PIX_FMT_GREY,
84 },
85};
86
87struct mt9v022 {
7fb0fd05 88 int model; /* V4L2_IDENT_MT9V022* codes from v4l2-chip-ident.h */
7397bfbe 89 u16 chip_control;
7397bfbe
GL		 90};
91
9538e1c2 92static int reg_read(struct i2c_client *client, const u8 reg)
7397bfbe 93{
7397bfbe
GL		 94 s32 data = i2c_smbus_read_word_data(client, reg);
95 return data < 0 ? data : swab16(data);
96}
97
9538e1c2 98static int reg_write(struct i2c_client *client, const u8 reg,
7397bfbe
GL		 99 const u16 data)
100{
9538e1c2 101 return i2c_smbus_write_word_data(client, reg, swab16(data));
7397bfbe
GL		 102}
103
9538e1c2 104static int reg_set(struct i2c_client *client, const u8 reg,
7397bfbe
GL		 105 const u16 data)
106{
107 int ret;
108
9538e1c2 109 ret = reg_read(client, reg);
7397bfbe
GL		 110 if (ret < 0)
111 return ret;
9538e1c2 112 return reg_write(client, reg, ret | data);
7397bfbe
GL		 113}
114
9538e1c2 115static int reg_clear(struct i2c_client *client, const u8 reg,
7397bfbe
GL		 116 const u16 data)
117{
118 int ret;
119
9538e1c2 120 ret = reg_read(client, reg);
7397bfbe
GL		 121 if (ret < 0)
122 return ret;
9538e1c2 123 return reg_write(client, reg, ret & ~data);
7397bfbe
GL		 124}
125
126static int mt9v022_init(struct soc_camera_device *icd)
127{
40e2e092
GL		 128 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
129 struct soc_camera_link *icl = to_soc_camera_link(icd);
130 struct mt9v022 *mt9v022 = i2c_get_clientdata(client);
7397bfbe
GL		 131 int ret;
132
81034663 133 if (icl->power) {
9538e1c2 134 ret = icl->power(&client->dev, 1);
81034663
SH		 135 if (ret < 0) {
136 dev_err(icd->vdev->parent,
137 "Platform failed to power-on the camera.\n");
138 return ret;
139 }
140 }
141
142 /*
143 * The camera could have been already on, we hard-reset it additionally,
144 * if available. Soft reset is done in video_probe().
145 */
146 if (icl->reset)
9538e1c2 147 icl->reset(&client->dev);
81034663 148
7397bfbe
GL		 149 /* Almost the default mode: master, parallel, simultaneous, and an
150 * undocumented bit 0x200, which is present in table 7, but not in 8,
151 * plus snapshot mode to disable scan for now */
152 mt9v022->chip_control |= 0x10;
9538e1c2 153 ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
11211641 154 if (!ret)
9538e1c2 155 ret = reg_write(client, MT9V022_READ_MODE, 0x300);
7397bfbe
GL		 156
157 /* All defaults */
11211641 158 if (!ret)
7397bfbe 159 /* AEC, AGC on */
9538e1c2 160 ret = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x3);
11211641 161 if (!ret)
9538e1c2 162 ret = reg_write(client, MT9V022_MAX_TOTAL_SHUTTER_WIDTH, 480);
11211641 163 if (!ret)
7397bfbe 164 /* default - auto */
9538e1c2 165 ret = reg_clear(client, MT9V022_BLACK_LEVEL_CALIB_CTRL, 1);
11211641 166 if (!ret)
9538e1c2 167 ret = reg_write(client, MT9V022_DIGITAL_TEST_PATTERN, 0);
7397bfbe 168
11211641 169 return ret;
7397bfbe
GL		 170}
171
172static int mt9v022_release(struct soc_camera_device *icd)
173{
40e2e092
GL		 174 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
175 struct soc_camera_link *icl = to_soc_camera_link(icd);
81034663
SH		 176
177 if (icl->power)
40e2e092 178 icl->power(&client->dev, 0);
81034663 179
7397bfbe
GL		 180 return 0;
181}
182
183static int mt9v022_start_capture(struct soc_camera_device *icd)
184{
40e2e092
GL		 185 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
186 struct mt9v022 *mt9v022 = i2c_get_clientdata(client);
7397bfbe
GL		 187 /* Switch to master "normal" mode */
188 mt9v022->chip_control &= ~0x10;
9538e1c2 189 if (reg_write(client, MT9V022_CHIP_CONTROL,
7397bfbe
GL		 190 mt9v022->chip_control) < 0)
191 return -EIO;
192 return 0;
193}
194
195static int mt9v022_stop_capture(struct soc_camera_device *icd)
196{
40e2e092
GL		 197 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
198 struct mt9v022 *mt9v022 = i2c_get_clientdata(client);
7397bfbe
GL		 199 /* Switch to snapshot mode */
200 mt9v022->chip_control |= 0x10;
9538e1c2 201 if (reg_write(client, MT9V022_CHIP_CONTROL,
7397bfbe
GL		 202 mt9v022->chip_control) < 0)
203 return -EIO;
204 return 0;
205}
206
ad5f2e85
GL		 207static int mt9v022_set_bus_param(struct soc_camera_device *icd,
208 unsigned long flags)
7397bfbe 209{
40e2e092
GL		 210 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
211 struct mt9v022 *mt9v022 = i2c_get_clientdata(client);
212 struct soc_camera_link *icl = to_soc_camera_link(icd);
ad5f2e85 213 unsigned int width_flag = flags & SOCAM_DATAWIDTH_MASK;
7397bfbe 214 int ret;
ad5f2e85 215 u16 pixclk = 0;
7397bfbe
GL		 216
217 /* Only one width bit may be set */
218 if (!is_power_of_2(width_flag))
219 return -EINVAL;
220
e958e27a
SH		 221 if (icl->set_bus_param) {
222 ret = icl->set_bus_param(icl, width_flag);
223 if (ret)
ad5f2e85 224 return ret;
e958e27a
SH		 225 } else {
226 /*
227 * Without board specific bus width settings we only support the
228 * sensors native bus width
229 */
230 if (width_flag != SOCAM_DATAWIDTH_10)
231 return -EINVAL;
ad5f2e85
GL		 232 }
233
bd73b36f
GL		 234 flags = soc_camera_apply_sensor_flags(icl, flags);
235
ad5f2e85
GL		 236 if (flags & SOCAM_PCLK_SAMPLE_RISING)
237 pixclk |= 0x10;
238
239 if (!(flags & SOCAM_HSYNC_ACTIVE_HIGH))
240 pixclk |= 0x1;
241
242 if (!(flags & SOCAM_VSYNC_ACTIVE_HIGH))
243 pixclk |= 0x2;
244
9538e1c2 245 ret = reg_write(client, MT9V022_PIXCLK_FV_LV, pixclk);
ad5f2e85
GL		 246 if (ret < 0)
247 return ret;
248
249 if (!(flags & SOCAM_MASTER))
250 mt9v022->chip_control &= ~0x8;
251
9538e1c2 252 ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
ad5f2e85
GL		 253 if (ret < 0)
254 return ret;
255
256 dev_dbg(&icd->dev, "Calculated pixclk 0x%x, chip control 0x%x\n",
257 pixclk, mt9v022->chip_control);
258
259 return 0;
260}
261
262static unsigned long mt9v022_query_bus_param(struct soc_camera_device *icd)
263{
40e2e092 264 struct soc_camera_link *icl = to_soc_camera_link(icd);
e958e27a 265 unsigned int width_flag;
ad5f2e85 266
e958e27a
SH		 267 if (icl->query_bus_param)
268 width_flag = icl->query_bus_param(icl) &
269 SOCAM_DATAWIDTH_MASK;
270 else
271 width_flag = SOCAM_DATAWIDTH_10;
ad5f2e85
GL		 272
273 return SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING |
274 SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW |
275 SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW |
2d9329f3 276 SOCAM_DATA_ACTIVE_HIGH | SOCAM_MASTER | SOCAM_SLAVE |
ad5f2e85
GL		 277 width_flag;
278}
279
09e231b3
GL		 280static int mt9v022_set_crop(struct soc_camera_device *icd,
281 struct v4l2_rect *rect)
ad5f2e85 282{
40e2e092 283 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
ad5f2e85
GL		 284 int ret;
285
7397bfbe 286 /* Like in example app. Contradicts the datasheet though */
9538e1c2 287 ret = reg_read(client, MT9V022_AEC_AGC_ENABLE);
7397bfbe
GL		 288 if (ret >= 0) {
289 if (ret & 1) /* Autoexposure */
9538e1c2 290 ret = reg_write(client, MT9V022_MAX_TOTAL_SHUTTER_WIDTH,
7397bfbe
GL		 291 rect->height + icd->y_skip_top + 43);
292 else
9538e1c2 293 ret = reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH,
7397bfbe
GL		 294 rect->height + icd->y_skip_top + 43);
295 }
296 /* Setup frame format: defaults apart from width and height */
11211641 297 if (!ret)
9538e1c2 298 ret = reg_write(client, MT9V022_COLUMN_START, rect->left);
11211641 299 if (!ret)
9538e1c2 300 ret = reg_write(client, MT9V022_ROW_START, rect->top);
11211641 301 if (!ret)
7397bfbe
GL		 302 /* Default 94, Phytec driver says:
303 * "width + horizontal blank >= 660" */
9538e1c2 304 ret = reg_write(client, MT9V022_HORIZONTAL_BLANKING,
7397bfbe
GL		 305 rect->width > 660 - 43 ? 43 :
306 660 - rect->width);
11211641 307 if (!ret)
9538e1c2 308 ret = reg_write(client, MT9V022_VERTICAL_BLANKING, 45);
11211641 309 if (!ret)
9538e1c2 310 ret = reg_write(client, MT9V022_WINDOW_WIDTH, rect->width);
11211641 311 if (!ret)
9538e1c2 312 ret = reg_write(client, MT9V022_WINDOW_HEIGHT,
7397bfbe
GL		 313 rect->height + icd->y_skip_top);
314
315 if (ret < 0)
316 return ret;
317
318 dev_dbg(&icd->dev, "Frame %ux%u pixel\n", rect->width, rect->height);
319
7397bfbe
GL		 320 return 0;
321}
322
09e231b3
GL		 323static int mt9v022_set_fmt(struct soc_camera_device *icd,
324 struct v4l2_format *f)
325{
40e2e092
GL		 326 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
327 struct mt9v022 *mt9v022 = i2c_get_clientdata(client);
09e231b3
GL		 328 struct v4l2_pix_format *pix = &f->fmt.pix;
329 struct v4l2_rect rect = {
330 .left = icd->x_current,
331 .top = icd->y_current,
332 .width = pix->width,
333 .height = pix->height,
334 };
335
336 /* The caller provides a supported format, as verified per call to
337 * icd->try_fmt(), datawidth is from our supported format list */
338 switch (pix->pixelformat) {
339 case V4L2_PIX_FMT_GREY:
340 case V4L2_PIX_FMT_Y16:
341 if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATM)
342 return -EINVAL;
343 break;
344 case V4L2_PIX_FMT_SBGGR8:
345 case V4L2_PIX_FMT_SBGGR16:
346 if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATC)
347 return -EINVAL;
348 break;
349 case 0:
350 /* No format change, only geometry */
351 break;
352 default:
353 return -EINVAL;
354 }
355
356 /* No support for scaling on this camera, just crop. */
357 return mt9v022_set_crop(icd, &rect);
358}
359
d8fac217
GL		 360static int mt9v022_try_fmt(struct soc_camera_device *icd,
361 struct v4l2_format *f)
7397bfbe 362{
64f5905e
GL		 363 struct v4l2_pix_format *pix = &f->fmt.pix;
364
653dc59b
TP		 365 v4l_bound_align_image(&pix->width, 48, 752, 2 /* ? */,
366 &pix->height, 32 + icd->y_skip_top,
367 480 + icd->y_skip_top, 0, 0);
7397bfbe
GL		 368
369 return 0;
370}
371
372static int mt9v022_get_chip_id(struct soc_camera_device *icd,
aecde8b5 373 struct v4l2_dbg_chip_ident *id)
7397bfbe 374{
40e2e092
GL		 375 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
376 struct mt9v022 *mt9v022 = i2c_get_clientdata(client);
7397bfbe 377
aecde8b5 378 if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
7397bfbe
GL		 379 return -EINVAL;
380
40e2e092 381 if (id->match.addr != client->addr)
7397bfbe
GL		 382 return -ENODEV;
383
384 id->ident = mt9v022->model;
385 id->revision = 0;
386
387 return 0;
388}
389
390#ifdef CONFIG_VIDEO_ADV_DEBUG
391static int mt9v022_get_register(struct soc_camera_device *icd,
aecde8b5 392 struct v4l2_dbg_register *reg)
7397bfbe 393{
40e2e092 394 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
7397bfbe 395
aecde8b5 396 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
7397bfbe
GL		 397 return -EINVAL;
398
9538e1c2 399 if (reg->match.addr != client->addr)
7397bfbe
GL		 400 return -ENODEV;
401
aecde8b5 402 reg->size = 2;
9538e1c2 403 reg->val = reg_read(client, reg->reg);
7397bfbe
GL		 404
405 if (reg->val > 0xffff)
406 return -EIO;
407
408 return 0;
409}
410
411static int mt9v022_set_register(struct soc_camera_device *icd,
aecde8b5 412 struct v4l2_dbg_register *reg)
7397bfbe 413{
40e2e092 414 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
7397bfbe 415
aecde8b5 416 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
7397bfbe
GL		 417 return -EINVAL;
418
9538e1c2 419 if (reg->match.addr != client->addr)
7397bfbe
GL		 420 return -ENODEV;
421
9538e1c2 422 if (reg_write(client, reg->reg, reg->val) < 0)
7397bfbe
GL		 423 return -EIO;
424
425 return 0;
426}
427#endif
428
4407a463 429static const struct v4l2_queryctrl mt9v022_controls[] = {
7397bfbe
GL		 430 {
431 .id = V4L2_CID_VFLIP,
432 .type = V4L2_CTRL_TYPE_BOOLEAN,
433 .name = "Flip Vertically",
434 .minimum = 0,
435 .maximum = 1,
436 .step = 1,
437 .default_value = 0,
438 }, {
439 .id = V4L2_CID_HFLIP,
440 .type = V4L2_CTRL_TYPE_BOOLEAN,
441 .name = "Flip Horizontally",
442 .minimum = 0,
443 .maximum = 1,
444 .step = 1,
445 .default_value = 0,
446 }, {
447 .id = V4L2_CID_GAIN,
448 .type = V4L2_CTRL_TYPE_INTEGER,
449 .name = "Analog Gain",
450 .minimum = 64,
451 .maximum = 127,
452 .step = 1,
453 .default_value = 64,
454 .flags = V4L2_CTRL_FLAG_SLIDER,
455 }, {
456 .id = V4L2_CID_EXPOSURE,
457 .type = V4L2_CTRL_TYPE_INTEGER,
458 .name = "Exposure",
459 .minimum = 1,
460 .maximum = 255,
461 .step = 1,
462 .default_value = 255,
463 .flags = V4L2_CTRL_FLAG_SLIDER,
464 }, {
465 .id = V4L2_CID_AUTOGAIN,
466 .type = V4L2_CTRL_TYPE_BOOLEAN,
467 .name = "Automatic Gain",
468 .minimum = 0,
469 .maximum = 1,
470 .step = 1,
471 .default_value = 1,
472 }, {
473 .id = V4L2_CID_EXPOSURE_AUTO,
474 .type = V4L2_CTRL_TYPE_BOOLEAN,
475 .name = "Automatic Exposure",
476 .minimum = 0,
477 .maximum = 1,
478 .step = 1,
479 .default_value = 1,
480 }
481};
482
26f1b942
GL		 483static int mt9v022_get_control(struct soc_camera_device *, struct v4l2_control *);
484static int mt9v022_set_control(struct soc_camera_device *, struct v4l2_control *);
7397bfbe
GL		 485
486static struct soc_camera_ops mt9v022_ops = {
487 .owner = THIS_MODULE,
488 .init = mt9v022_init,
489 .release = mt9v022_release,
490 .start_capture = mt9v022_start_capture,
491 .stop_capture = mt9v022_stop_capture,
09e231b3 492 .set_crop = mt9v022_set_crop,
d8fac217
GL		 493 .set_fmt = mt9v022_set_fmt,
494 .try_fmt = mt9v022_try_fmt,
ad5f2e85
GL		 495 .set_bus_param = mt9v022_set_bus_param,
496 .query_bus_param = mt9v022_query_bus_param,
7397bfbe
GL		 497 .controls = mt9v022_controls,
498 .num_controls = ARRAY_SIZE(mt9v022_controls),
499 .get_control = mt9v022_get_control,
500 .set_control = mt9v022_set_control,
501 .get_chip_id = mt9v022_get_chip_id,
502#ifdef CONFIG_VIDEO_ADV_DEBUG
503 .get_register = mt9v022_get_register,
504 .set_register = mt9v022_set_register,
505#endif
506};
507
508static int mt9v022_get_control(struct soc_camera_device *icd,
509 struct v4l2_control *ctrl)
510{
40e2e092 511 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
7397bfbe
GL		 512 int data;
513
514 switch (ctrl->id) {
515 case V4L2_CID_VFLIP:
9538e1c2 516 data = reg_read(client, MT9V022_READ_MODE);
7397bfbe
GL		 517 if (data < 0)
518 return -EIO;
519 ctrl->value = !!(data & 0x10);
520 break;
521 case V4L2_CID_HFLIP:
9538e1c2 522 data = reg_read(client, MT9V022_READ_MODE);
7397bfbe
GL		 523 if (data < 0)
524 return -EIO;
525 ctrl->value = !!(data & 0x20);
526 break;
527 case V4L2_CID_EXPOSURE_AUTO:
9538e1c2 528 data = reg_read(client, MT9V022_AEC_AGC_ENABLE);
7397bfbe
GL		 529 if (data < 0)
530 return -EIO;
531 ctrl->value = !!(data & 0x1);
532 break;
533 case V4L2_CID_AUTOGAIN:
9538e1c2 534 data = reg_read(client, MT9V022_AEC_AGC_ENABLE);
7397bfbe
GL		 535 if (data < 0)
536 return -EIO;
537 ctrl->value = !!(data & 0x2);
538 break;
539 }
540 return 0;
541}
542
543static int mt9v022_set_control(struct soc_camera_device *icd,
544 struct v4l2_control *ctrl)
545{
546 int data;
40e2e092 547 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
7397bfbe
GL		 548 const struct v4l2_queryctrl *qctrl;
549
550 qctrl = soc_camera_find_qctrl(&mt9v022_ops, ctrl->id);
551
552 if (!qctrl)
553 return -EINVAL;
554
555 switch (ctrl->id) {
556 case V4L2_CID_VFLIP:
557 if (ctrl->value)
9538e1c2 558 data = reg_set(client, MT9V022_READ_MODE, 0x10);
7397bfbe 559 else
9538e1c2 560 data = reg_clear(client, MT9V022_READ_MODE, 0x10);
7397bfbe
GL		 561 if (data < 0)
562 return -EIO;
563 break;
564 case V4L2_CID_HFLIP:
565 if (ctrl->value)
9538e1c2 566 data = reg_set(client, MT9V022_READ_MODE, 0x20);
7397bfbe 567 else
9538e1c2 568 data = reg_clear(client, MT9V022_READ_MODE, 0x20);
7397bfbe
GL		 569 if (data < 0)
570 return -EIO;
571 break;
572 case V4L2_CID_GAIN:
573 /* mt9v022 has minimum == default */
574 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
575 return -EINVAL;
576 else {
577 unsigned long range = qctrl->maximum - qctrl->minimum;
578 /* Datasheet says 16 to 64. autogain only works properly
579 * after setting gain to maximum 14. Larger values
580 * produce "white fly" noise effect. On the whole,
581 * manually setting analog gain does no good. */
582 unsigned long gain = ((ctrl->value - qctrl->minimum) *
583 10 + range / 2) / range + 4;
584 if (gain >= 32)
585 gain &= ~1;
586 /* The user wants to set gain manually, hope, she
587 * knows, what she's doing... Switch AGC off. */
588
9538e1c2 589 if (reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x2) < 0)
7397bfbe
GL		 590 return -EIO;
591
592 dev_info(&icd->dev, "Setting gain from %d to %lu\n",
9538e1c2
GL		 593 reg_read(client, MT9V022_ANALOG_GAIN), gain);
594 if (reg_write(client, MT9V022_ANALOG_GAIN, gain) < 0)
7397bfbe
GL		 595 return -EIO;
596 icd->gain = ctrl->value;
597 }
598 break;
599 case V4L2_CID_EXPOSURE:
600 /* mt9v022 has maximum == default */
601 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
602 return -EINVAL;
603 else {
604 unsigned long range = qctrl->maximum - qctrl->minimum;
605 unsigned long shutter = ((ctrl->value - qctrl->minimum) *
606 479 + range / 2) / range + 1;
607 /* The user wants to set shutter width manually, hope,
608 * she knows, what she's doing... Switch AEC off. */
609
9538e1c2 610 if (reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x1) < 0)
7397bfbe
GL		 611 return -EIO;
612
613 dev_dbg(&icd->dev, "Shutter width from %d to %lu\n",
9538e1c2 614 reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH),
7397bfbe 615 shutter);
9538e1c2 616 if (reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH,
7397bfbe
GL		 617 shutter) < 0)
618 return -EIO;
619 icd->exposure = ctrl->value;
620 }
621 break;
622 case V4L2_CID_AUTOGAIN:
623 if (ctrl->value)
9538e1c2 624 data = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x2);
7397bfbe 625 else
9538e1c2 626 data = reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x2);
7397bfbe
GL		 627 if (data < 0)
628 return -EIO;
629 break;
630 case V4L2_CID_EXPOSURE_AUTO:
631 if (ctrl->value)
9538e1c2 632 data = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x1);
7397bfbe 633 else
9538e1c2 634 data = reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x1);
7397bfbe
GL		 635 if (data < 0)
636 return -EIO;
637 break;
638 }
639 return 0;
640}
641
642/* Interface active, can use i2c. If it fails, it can indeed mean, that
643 * this wasn't our capture interface, so, we wait for the right one */
40e2e092
GL		 644static int mt9v022_video_probe(struct soc_camera_device *icd,
645 struct i2c_client *client)
7397bfbe 646{
40e2e092
GL		 647 struct mt9v022 *mt9v022 = i2c_get_clientdata(client);
648 struct soc_camera_link *icl = to_soc_camera_link(icd);
7397bfbe
GL		 649 s32 data;
650 int ret;
e958e27a 651 unsigned long flags;
7397bfbe
GL		 652
653 if (!icd->dev.parent ||
654 to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
655 return -ENODEV;
656
40e2e092
GL		 657 /* Switch master clock on */
658 ret = soc_camera_video_start(icd, &client->dev);
659 if (ret)
660 return ret;
661
7397bfbe 662 /* Read out the chip version register */
9538e1c2 663 data = reg_read(client, MT9V022_CHIP_VERSION);
7397bfbe
GL		 664
665 /* must be 0x1311 or 0x1313 */
666 if (data != 0x1311 && data != 0x1313) {
667 ret = -ENODEV;
668 dev_info(&icd->dev, "No MT9V022 detected, ID register 0x%x\n",
669 data);
670 goto ei2c;
671 }
672
673 /* Soft reset */
9538e1c2 674 ret = reg_write(client, MT9V022_RESET, 1);
7397bfbe
GL		 675 if (ret < 0)
676 goto ei2c;
677 /* 15 clock cycles */
678 udelay(200);
9538e1c2 679 if (reg_read(client, MT9V022_RESET)) {
7397bfbe 680 dev_err(&icd->dev, "Resetting MT9V022 failed!\n");
40e2e092
GL		 681 if (ret > 0)
682 ret = -EIO;
7397bfbe
GL		 683 goto ei2c;
684 }
685
686 /* Set monochrome or colour sensor type */
687 if (sensor_type && (!strcmp("colour", sensor_type) ||
688 !strcmp("color", sensor_type))) {
9538e1c2 689 ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 4 | 0x11);
7397bfbe 690 mt9v022->model = V4L2_IDENT_MT9V022IX7ATC;
26f1b942 691 icd->formats = mt9v022_colour_formats;
7397bfbe 692 } else {
9538e1c2 693 ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 0x11);
7397bfbe 694 mt9v022->model = V4L2_IDENT_MT9V022IX7ATM;
26f1b942 695 icd->formats = mt9v022_monochrome_formats;
7397bfbe
GL		 696 }
697
e958e27a 698 if (ret < 0)
40e2e092 699 goto ei2c;
e958e27a
SH		 700
701 icd->num_formats = 0;
702
703 /*
704 * This is a 10bit sensor, so by default we only allow 10bit.
705 * The platform may support different bus widths due to
706 * different routing of the data lines.
707 */
708 if (icl->query_bus_param)
709 flags = icl->query_bus_param(icl);
710 else
711 flags = SOCAM_DATAWIDTH_10;
712
713 if (flags & SOCAM_DATAWIDTH_10)
714 icd->num_formats++;
715 else
716 icd->formats++;
717
718 if (flags & SOCAM_DATAWIDTH_8)
719 icd->num_formats++;
720
7397bfbe
GL		 721 dev_info(&icd->dev, "Detected a MT9V022 chip ID %x, %s sensor\n",
722 data, mt9v022->model == V4L2_IDENT_MT9V022IX7ATM ?
723 "monochrome" : "colour");
724
7397bfbe 725ei2c:
40e2e092
GL		 726 soc_camera_video_stop(icd);
727
7397bfbe
GL		 728 return ret;
729}
730
731static void mt9v022_video_remove(struct soc_camera_device *icd)
732{
40e2e092
GL		 733 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
734 struct soc_camera_link *icl = to_soc_camera_link(icd);
7397bfbe 735
40e2e092 736 dev_dbg(&icd->dev, "Video %x removed: %p, %p\n", client->addr,
a85bdace 737 icd->dev.parent, icd->vdev);
594bb46d
GL		 738 if (icl->free_bus)
739 icl->free_bus(icl);
7397bfbe
GL		 740}
741
d2653e92
JD		 742static int mt9v022_probe(struct i2c_client *client,
743 const struct i2c_device_id *did)
7397bfbe
GL		 744{
745 struct mt9v022 *mt9v022;
40e2e092 746 struct soc_camera_device *icd = client->dev.platform_data;
7397bfbe 747 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
40e2e092 748 struct soc_camera_link *icl;
7397bfbe
GL		 749 int ret;
750
40e2e092
GL		 751 if (!icd) {
752 dev_err(&client->dev, "MT9V022: missing soc-camera data!\n");
753 return -EINVAL;
754 }
755
756 icl = to_soc_camera_link(icd);
7397bfbe
GL		 757 if (!icl) {
758 dev_err(&client->dev, "MT9V022 driver needs platform data\n");
759 return -EINVAL;
760 }
761
762 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
763 dev_warn(&adapter->dev,
764 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
765 return -EIO;
766 }
767
768 mt9v022 = kzalloc(sizeof(struct mt9v022), GFP_KERNEL);
769 if (!mt9v022)
770 return -ENOMEM;
771
772 mt9v022->chip_control = MT9V022_CHIP_CONTROL_DEFAULT;
7397bfbe
GL		 773 i2c_set_clientdata(client, mt9v022);
774
7397bfbe 775 icd->ops = &mt9v022_ops;
7397bfbe
GL		 776 icd->x_min = 1;
777 icd->y_min = 4;
778 icd->x_current = 1;
779 icd->y_current = 4;
780 icd->width_min = 48;
781 icd->width_max = 752;
782 icd->height_min = 32;
783 icd->height_max = 480;
784 icd->y_skip_top = 1;
7397bfbe 785
40e2e092
GL		 786 ret = mt9v022_video_probe(icd, client);
787 if (ret) {
788 icd->ops = NULL;
789 i2c_set_clientdata(client, NULL);
790 kfree(mt9v022);
791 }
7397bfbe 792
7397bfbe
GL		 793 return ret;
794}
795
796static int mt9v022_remove(struct i2c_client *client)
797{
798 struct mt9v022 *mt9v022 = i2c_get_clientdata(client);
40e2e092 799 struct soc_camera_device *icd = client->dev.platform_data;
7397bfbe 800
40e2e092
GL		 801 icd->ops = NULL;
802 mt9v022_video_remove(icd);
803 i2c_set_clientdata(client, NULL);
804 client->driver = NULL;
7397bfbe
GL		 805 kfree(mt9v022);
806
807 return 0;
808}
3760f736
JD		 809static const struct i2c_device_id mt9v022_id[] = {
810 { "mt9v022", 0 },
811 { }
812};
813MODULE_DEVICE_TABLE(i2c, mt9v022_id);
814
7397bfbe
GL		 815static struct i2c_driver mt9v022_i2c_driver = {
816 .driver = {
817 .name = "mt9v022",
818 },
819 .probe = mt9v022_probe,
820 .remove = mt9v022_remove,
3760f736 821 .id_table = mt9v022_id,
7397bfbe
GL		 822};
823
824static int __init mt9v022_mod_init(void)
825{
826 return i2c_add_driver(&mt9v022_i2c_driver);
827}
828
829static void __exit mt9v022_mod_exit(void)
830{
831 i2c_del_driver(&mt9v022_i2c_driver);
832}
833
834module_init(mt9v022_mod_init);
835module_exit(mt9v022_mod_exit);
836
837MODULE_DESCRIPTION("Micron MT9V022 Camera driver");
838MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
839MODULE_LICENSE("GPL");
kernel source for telekom puls (alcatel/mediatek)