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V4L/DVB (11032): mt9m001: allow setting of bus width from board code
[GitHub/moto-9609/android_kernel_motorola_exynos9610.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>
91e64c88 16#include <linux/gpio.h>
7397bfbe
GL		 17
18#include <media/v4l2-common.h>
19#include <media/v4l2-chip-ident.h>
20#include <media/soc_camera.h>
21
7397bfbe
GL		 22/* mt9v022 i2c address 0x48, 0x4c, 0x58, 0x5c
23 * The platform has to define i2c_board_info
24 * and call i2c_register_board_info() */
25
26static char *sensor_type;
27module_param(sensor_type, charp, S_IRUGO);
61a2d07d 28MODULE_PARM_DESC(sensor_type, "Sensor type: \"colour\" or \"monochrome\"");
7397bfbe
GL		 29
30/* mt9v022 selected register addresses */
31#define MT9V022_CHIP_VERSION 0x00
32#define MT9V022_COLUMN_START 0x01
33#define MT9V022_ROW_START 0x02
34#define MT9V022_WINDOW_HEIGHT 0x03
35#define MT9V022_WINDOW_WIDTH 0x04
36#define MT9V022_HORIZONTAL_BLANKING 0x05
37#define MT9V022_VERTICAL_BLANKING 0x06
38#define MT9V022_CHIP_CONTROL 0x07
39#define MT9V022_SHUTTER_WIDTH1 0x08
40#define MT9V022_SHUTTER_WIDTH2 0x09
41#define MT9V022_SHUTTER_WIDTH_CTRL 0x0a
42#define MT9V022_TOTAL_SHUTTER_WIDTH 0x0b
43#define MT9V022_RESET 0x0c
44#define MT9V022_READ_MODE 0x0d
45#define MT9V022_MONITOR_MODE 0x0e
46#define MT9V022_PIXEL_OPERATION_MODE 0x0f
47#define MT9V022_LED_OUT_CONTROL 0x1b
48#define MT9V022_ADC_MODE_CONTROL 0x1c
49#define MT9V022_ANALOG_GAIN 0x34
50#define MT9V022_BLACK_LEVEL_CALIB_CTRL 0x47
51#define MT9V022_PIXCLK_FV_LV 0x74
52#define MT9V022_DIGITAL_TEST_PATTERN 0x7f
53#define MT9V022_AEC_AGC_ENABLE 0xAF
54#define MT9V022_MAX_TOTAL_SHUTTER_WIDTH 0xBD
55
56/* Progressive scan, master, defaults */
57#define MT9V022_CHIP_CONTROL_DEFAULT 0x188
58
bb55de3b
GL		 59static const struct soc_camera_data_format mt9v022_colour_formats[] = {
60 /* Order important: first natively supported,
61 * second supported with a GPIO extender */
7397bfbe 62 {
bb55de3b 63 .name = "Bayer (sRGB) 10 bit",
7397bfbe
GL		 64 .depth = 10,
65 .fourcc = V4L2_PIX_FMT_SBGGR16,
66 .colorspace = V4L2_COLORSPACE_SRGB,
67 }, {
bb55de3b
GL		 68 .name = "Bayer (sRGB) 8 bit",
69 .depth = 8,
70 .fourcc = V4L2_PIX_FMT_SBGGR8,
71 .colorspace = V4L2_COLORSPACE_SRGB,
72 }
73};
74
75static const struct soc_camera_data_format mt9v022_monochrome_formats[] = {
76 /* Order important - see above */
77 {
7397bfbe
GL		 78 .name = "Monochrome 10 bit",
79 .depth = 10,
80 .fourcc = V4L2_PIX_FMT_Y16,
81 }, {
82 .name = "Monochrome 8 bit",
83 .depth = 8,
84 .fourcc = V4L2_PIX_FMT_GREY,
85 },
86};
87
88struct mt9v022 {
89 struct i2c_client *client;
90 struct soc_camera_device icd;
7fb0fd05 91 int model; /* V4L2_IDENT_MT9V022* codes from v4l2-chip-ident.h */
7397bfbe
GL		 92 int switch_gpio;
93 u16 chip_control;
94 unsigned char datawidth;
95};
96
97static int reg_read(struct soc_camera_device *icd, const u8 reg)
98{
99 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
100 struct i2c_client *client = mt9v022->client;
101 s32 data = i2c_smbus_read_word_data(client, reg);
102 return data < 0 ? data : swab16(data);
103}
104
105static int reg_write(struct soc_camera_device *icd, const u8 reg,
106 const u16 data)
107{
108 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
109 return i2c_smbus_write_word_data(mt9v022->client, reg, swab16(data));
110}
111
112static int reg_set(struct soc_camera_device *icd, const u8 reg,
113 const u16 data)
114{
115 int ret;
116
117 ret = reg_read(icd, reg);
118 if (ret < 0)
119 return ret;
120 return reg_write(icd, reg, ret | data);
121}
122
123static int reg_clear(struct soc_camera_device *icd, const u8 reg,
124 const u16 data)
125{
126 int ret;
127
128 ret = reg_read(icd, reg);
129 if (ret < 0)
130 return ret;
131 return reg_write(icd, reg, ret & ~data);
132}
133
134static int mt9v022_init(struct soc_camera_device *icd)
135{
136 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
81034663 137 struct soc_camera_link *icl = mt9v022->client->dev.platform_data;
7397bfbe
GL		 138 int ret;
139
81034663
SH		 140 if (icl->power) {
141 ret = icl->power(&mt9v022->client->dev, 1);
142 if (ret < 0) {
143 dev_err(icd->vdev->parent,
144 "Platform failed to power-on the camera.\n");
145 return ret;
146 }
147 }
148
149 /*
150 * The camera could have been already on, we hard-reset it additionally,
151 * if available. Soft reset is done in video_probe().
152 */
153 if (icl->reset)
154 icl->reset(&mt9v022->client->dev);
155
7397bfbe
GL		 156 /* Almost the default mode: master, parallel, simultaneous, and an
157 * undocumented bit 0x200, which is present in table 7, but not in 8,
158 * plus snapshot mode to disable scan for now */
159 mt9v022->chip_control |= 0x10;
160 ret = reg_write(icd, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
11211641
GL		 161 if (!ret)
162 ret = reg_write(icd, MT9V022_READ_MODE, 0x300);
7397bfbe
GL		 163
164 /* All defaults */
11211641 165 if (!ret)
7397bfbe
GL		 166 /* AEC, AGC on */
167 ret = reg_set(icd, MT9V022_AEC_AGC_ENABLE, 0x3);
11211641 168 if (!ret)
7397bfbe 169 ret = reg_write(icd, MT9V022_MAX_TOTAL_SHUTTER_WIDTH, 480);
11211641 170 if (!ret)
7397bfbe
GL		 171 /* default - auto */
172 ret = reg_clear(icd, MT9V022_BLACK_LEVEL_CALIB_CTRL, 1);
11211641 173 if (!ret)
7397bfbe
GL		 174 ret = reg_write(icd, MT9V022_DIGITAL_TEST_PATTERN, 0);
175
11211641 176 return ret;
7397bfbe
GL		 177}
178
179static int mt9v022_release(struct soc_camera_device *icd)
180{
81034663
SH		 181 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
182 struct soc_camera_link *icl = mt9v022->client->dev.platform_data;
183
184 if (icl->power)
185 icl->power(&mt9v022->client->dev, 0);
186
7397bfbe
GL		 187 return 0;
188}
189
190static int mt9v022_start_capture(struct soc_camera_device *icd)
191{
192 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
193 /* Switch to master "normal" mode */
194 mt9v022->chip_control &= ~0x10;
195 if (reg_write(icd, MT9V022_CHIP_CONTROL,
196 mt9v022->chip_control) < 0)
197 return -EIO;
198 return 0;
199}
200
201static int mt9v022_stop_capture(struct soc_camera_device *icd)
202{
203 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
204 /* Switch to snapshot mode */
205 mt9v022->chip_control |= 0x10;
206 if (reg_write(icd, MT9V022_CHIP_CONTROL,
207 mt9v022->chip_control) < 0)
208 return -EIO;
209 return 0;
210}
211
212static int bus_switch_request(struct mt9v022 *mt9v022, struct soc_camera_link *icl)
213{
214#ifdef CONFIG_MT9V022_PCA9536_SWITCH
215 int ret;
216 unsigned int gpio = icl->gpio;
217
b4333a3b 218 if (gpio_is_valid(gpio)) {
7397bfbe
GL		 219 /* We have a data bus switch. */
220 ret = gpio_request(gpio, "mt9v022");
221 if (ret < 0) {
222 dev_err(&mt9v022->client->dev, "Cannot get GPIO %u\n", gpio);
223 return ret;
224 }
225
226 ret = gpio_direction_output(gpio, 0);
227 if (ret < 0) {
228 dev_err(&mt9v022->client->dev,
229 "Cannot set GPIO %u to output\n", gpio);
230 gpio_free(gpio);
231 return ret;
232 }
233 }
234
235 mt9v022->switch_gpio = gpio;
236#else
b4333a3b 237 mt9v022->switch_gpio = -EINVAL;
7397bfbe
GL		 238#endif
239 return 0;
240}
241
242static void bus_switch_release(struct mt9v022 *mt9v022)
243{
244#ifdef CONFIG_MT9V022_PCA9536_SWITCH
b4333a3b 245 if (gpio_is_valid(mt9v022->switch_gpio))
7397bfbe
GL		 246 gpio_free(mt9v022->switch_gpio);
247#endif
248}
249
250static int bus_switch_act(struct mt9v022 *mt9v022, int go8bit)
251{
252#ifdef CONFIG_MT9V022_PCA9536_SWITCH
b4333a3b 253 if (!gpio_is_valid(mt9v022->switch_gpio))
7397bfbe
GL		 254 return -ENODEV;
255
256 gpio_set_value_cansleep(mt9v022->switch_gpio, go8bit);
257 return 0;
258#else
259 return -ENODEV;
260#endif
261}
262
ad5f2e85
GL		 263static int bus_switch_possible(struct mt9v022 *mt9v022)
264{
265#ifdef CONFIG_MT9V022_PCA9536_SWITCH
266 return gpio_is_valid(mt9v022->switch_gpio);
267#else
268 return 0;
269#endif
270}
271
272static int mt9v022_set_bus_param(struct soc_camera_device *icd,
273 unsigned long flags)
7397bfbe
GL		 274{
275 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
bd73b36f 276 struct soc_camera_link *icl = mt9v022->client->dev.platform_data;
ad5f2e85 277 unsigned int width_flag = flags & SOCAM_DATAWIDTH_MASK;
7397bfbe 278 int ret;
ad5f2e85 279 u16 pixclk = 0;
7397bfbe
GL		 280
281 /* Only one width bit may be set */
282 if (!is_power_of_2(width_flag))
283 return -EINVAL;
284
ad5f2e85
GL		 285 if ((mt9v022->datawidth != 10 && (width_flag == SOCAM_DATAWIDTH_10)) ||
286 (mt9v022->datawidth != 9 && (width_flag == SOCAM_DATAWIDTH_9)) ||
287 (mt9v022->datawidth != 8 && (width_flag == SOCAM_DATAWIDTH_8))) {
288 /* Well, we actually only can do 10 or 8 bits... */
289 if (width_flag == SOCAM_DATAWIDTH_9)
290 return -EINVAL;
291
292 ret = bus_switch_act(mt9v022,
293 width_flag == SOCAM_DATAWIDTH_8);
294 if (ret < 0)
295 return ret;
296
297 mt9v022->datawidth = width_flag == SOCAM_DATAWIDTH_8 ? 8 : 10;
298 }
299
bd73b36f
GL		 300 flags = soc_camera_apply_sensor_flags(icl, flags);
301
ad5f2e85
GL		 302 if (flags & SOCAM_PCLK_SAMPLE_RISING)
303 pixclk |= 0x10;
304
305 if (!(flags & SOCAM_HSYNC_ACTIVE_HIGH))
306 pixclk |= 0x1;
307
308 if (!(flags & SOCAM_VSYNC_ACTIVE_HIGH))
309 pixclk |= 0x2;
310
311 ret = reg_write(icd, MT9V022_PIXCLK_FV_LV, pixclk);
312 if (ret < 0)
313 return ret;
314
315 if (!(flags & SOCAM_MASTER))
316 mt9v022->chip_control &= ~0x8;
317
318 ret = reg_write(icd, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
319 if (ret < 0)
320 return ret;
321
322 dev_dbg(&icd->dev, "Calculated pixclk 0x%x, chip control 0x%x\n",
323 pixclk, mt9v022->chip_control);
324
325 return 0;
326}
327
328static unsigned long mt9v022_query_bus_param(struct soc_camera_device *icd)
329{
330 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
331 unsigned int width_flag = SOCAM_DATAWIDTH_10;
332
333 if (bus_switch_possible(mt9v022))
334 width_flag |= SOCAM_DATAWIDTH_8;
335
336 return SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING |
337 SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW |
338 SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW |
2d9329f3 339 SOCAM_DATA_ACTIVE_HIGH | SOCAM_MASTER | SOCAM_SLAVE |
ad5f2e85
GL		 340 width_flag;
341}
342
09e231b3
GL		 343static int mt9v022_set_crop(struct soc_camera_device *icd,
344 struct v4l2_rect *rect)
ad5f2e85 345{
ad5f2e85
GL		 346 int ret;
347
7397bfbe
GL		 348 /* Like in example app. Contradicts the datasheet though */
349 ret = reg_read(icd, MT9V022_AEC_AGC_ENABLE);
350 if (ret >= 0) {
351 if (ret & 1) /* Autoexposure */
352 ret = reg_write(icd, MT9V022_MAX_TOTAL_SHUTTER_WIDTH,
353 rect->height + icd->y_skip_top + 43);
354 else
355 ret = reg_write(icd, MT9V022_TOTAL_SHUTTER_WIDTH,
356 rect->height + icd->y_skip_top + 43);
357 }
358 /* Setup frame format: defaults apart from width and height */
11211641 359 if (!ret)
7397bfbe 360 ret = reg_write(icd, MT9V022_COLUMN_START, rect->left);
11211641 361 if (!ret)
7397bfbe 362 ret = reg_write(icd, MT9V022_ROW_START, rect->top);
11211641 363 if (!ret)
7397bfbe
GL		 364 /* Default 94, Phytec driver says:
365 * "width + horizontal blank >= 660" */
366 ret = reg_write(icd, MT9V022_HORIZONTAL_BLANKING,
367 rect->width > 660 - 43 ? 43 :
368 660 - rect->width);
11211641 369 if (!ret)
7397bfbe 370 ret = reg_write(icd, MT9V022_VERTICAL_BLANKING, 45);
11211641 371 if (!ret)
7397bfbe 372 ret = reg_write(icd, MT9V022_WINDOW_WIDTH, rect->width);
11211641 373 if (!ret)
7397bfbe
GL		 374 ret = reg_write(icd, MT9V022_WINDOW_HEIGHT,
375 rect->height + icd->y_skip_top);
376
377 if (ret < 0)
378 return ret;
379
380 dev_dbg(&icd->dev, "Frame %ux%u pixel\n", rect->width, rect->height);
381
7397bfbe
GL		 382 return 0;
383}
384
09e231b3
GL		 385static int mt9v022_set_fmt(struct soc_camera_device *icd,
386 struct v4l2_format *f)
387{
388 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
389 struct v4l2_pix_format *pix = &f->fmt.pix;
390 struct v4l2_rect rect = {
391 .left = icd->x_current,
392 .top = icd->y_current,
393 .width = pix->width,
394 .height = pix->height,
395 };
396
397 /* The caller provides a supported format, as verified per call to
398 * icd->try_fmt(), datawidth is from our supported format list */
399 switch (pix->pixelformat) {
400 case V4L2_PIX_FMT_GREY:
401 case V4L2_PIX_FMT_Y16:
402 if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATM)
403 return -EINVAL;
404 break;
405 case V4L2_PIX_FMT_SBGGR8:
406 case V4L2_PIX_FMT_SBGGR16:
407 if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATC)
408 return -EINVAL;
409 break;
410 case 0:
411 /* No format change, only geometry */
412 break;
413 default:
414 return -EINVAL;
415 }
416
417 /* No support for scaling on this camera, just crop. */
418 return mt9v022_set_crop(icd, &rect);
419}
420
d8fac217
GL		 421static int mt9v022_try_fmt(struct soc_camera_device *icd,
422 struct v4l2_format *f)
7397bfbe 423{
64f5905e
GL		 424 struct v4l2_pix_format *pix = &f->fmt.pix;
425
426 if (pix->height < 32 + icd->y_skip_top)
427 pix->height = 32 + icd->y_skip_top;
428 if (pix->height > 480 + icd->y_skip_top)
429 pix->height = 480 + icd->y_skip_top;
430 if (pix->width < 48)
431 pix->width = 48;
432 if (pix->width > 752)
433 pix->width = 752;
434 pix->width &= ~0x03; /* ? */
7397bfbe
GL		 435
436 return 0;
437}
438
439static int mt9v022_get_chip_id(struct soc_camera_device *icd,
aecde8b5 440 struct v4l2_dbg_chip_ident *id)
7397bfbe
GL		 441{
442 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
443
aecde8b5 444 if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
7397bfbe
GL		 445 return -EINVAL;
446
aecde8b5 447 if (id->match.addr != mt9v022->client->addr)
7397bfbe
GL		 448 return -ENODEV;
449
450 id->ident = mt9v022->model;
451 id->revision = 0;
452
453 return 0;
454}
455
456#ifdef CONFIG_VIDEO_ADV_DEBUG
457static int mt9v022_get_register(struct soc_camera_device *icd,
aecde8b5 458 struct v4l2_dbg_register *reg)
7397bfbe
GL		 459{
460 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
461
aecde8b5 462 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
7397bfbe
GL		 463 return -EINVAL;
464
aecde8b5 465 if (reg->match.addr != mt9v022->client->addr)
7397bfbe
GL		 466 return -ENODEV;
467
aecde8b5 468 reg->size = 2;
7397bfbe
GL		 469 reg->val = reg_read(icd, reg->reg);
470
471 if (reg->val > 0xffff)
472 return -EIO;
473
474 return 0;
475}
476
477static int mt9v022_set_register(struct soc_camera_device *icd,
aecde8b5 478 struct v4l2_dbg_register *reg)
7397bfbe
GL		 479{
480 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
481
aecde8b5 482 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
7397bfbe
GL		 483 return -EINVAL;
484
aecde8b5 485 if (reg->match.addr != mt9v022->client->addr)
7397bfbe
GL		 486 return -ENODEV;
487
488 if (reg_write(icd, reg->reg, reg->val) < 0)
489 return -EIO;
490
491 return 0;
492}
493#endif
494
4407a463 495static const struct v4l2_queryctrl mt9v022_controls[] = {
7397bfbe
GL		 496 {
497 .id = V4L2_CID_VFLIP,
498 .type = V4L2_CTRL_TYPE_BOOLEAN,
499 .name = "Flip Vertically",
500 .minimum = 0,
501 .maximum = 1,
502 .step = 1,
503 .default_value = 0,
504 }, {
505 .id = V4L2_CID_HFLIP,
506 .type = V4L2_CTRL_TYPE_BOOLEAN,
507 .name = "Flip Horizontally",
508 .minimum = 0,
509 .maximum = 1,
510 .step = 1,
511 .default_value = 0,
512 }, {
513 .id = V4L2_CID_GAIN,
514 .type = V4L2_CTRL_TYPE_INTEGER,
515 .name = "Analog Gain",
516 .minimum = 64,
517 .maximum = 127,
518 .step = 1,
519 .default_value = 64,
520 .flags = V4L2_CTRL_FLAG_SLIDER,
521 }, {
522 .id = V4L2_CID_EXPOSURE,
523 .type = V4L2_CTRL_TYPE_INTEGER,
524 .name = "Exposure",
525 .minimum = 1,
526 .maximum = 255,
527 .step = 1,
528 .default_value = 255,
529 .flags = V4L2_CTRL_FLAG_SLIDER,
530 }, {
531 .id = V4L2_CID_AUTOGAIN,
532 .type = V4L2_CTRL_TYPE_BOOLEAN,
533 .name = "Automatic Gain",
534 .minimum = 0,
535 .maximum = 1,
536 .step = 1,
537 .default_value = 1,
538 }, {
539 .id = V4L2_CID_EXPOSURE_AUTO,
540 .type = V4L2_CTRL_TYPE_BOOLEAN,
541 .name = "Automatic Exposure",
542 .minimum = 0,
543 .maximum = 1,
544 .step = 1,
545 .default_value = 1,
546 }
547};
548
26f1b942
GL		 549static int mt9v022_video_probe(struct soc_camera_device *);
550static void mt9v022_video_remove(struct soc_camera_device *);
551static int mt9v022_get_control(struct soc_camera_device *, struct v4l2_control *);
552static int mt9v022_set_control(struct soc_camera_device *, struct v4l2_control *);
7397bfbe
GL		 553
554static struct soc_camera_ops mt9v022_ops = {
555 .owner = THIS_MODULE,
26f1b942
GL		 556 .probe = mt9v022_video_probe,
557 .remove = mt9v022_video_remove,
7397bfbe
GL		 558 .init = mt9v022_init,
559 .release = mt9v022_release,
560 .start_capture = mt9v022_start_capture,
561 .stop_capture = mt9v022_stop_capture,
09e231b3 562 .set_crop = mt9v022_set_crop,
d8fac217
GL		 563 .set_fmt = mt9v022_set_fmt,
564 .try_fmt = mt9v022_try_fmt,
ad5f2e85
GL		 565 .set_bus_param = mt9v022_set_bus_param,
566 .query_bus_param = mt9v022_query_bus_param,
7397bfbe
GL		 567 .controls = mt9v022_controls,
568 .num_controls = ARRAY_SIZE(mt9v022_controls),
569 .get_control = mt9v022_get_control,
570 .set_control = mt9v022_set_control,
571 .get_chip_id = mt9v022_get_chip_id,
572#ifdef CONFIG_VIDEO_ADV_DEBUG
573 .get_register = mt9v022_get_register,
574 .set_register = mt9v022_set_register,
575#endif
576};
577
578static int mt9v022_get_control(struct soc_camera_device *icd,
579 struct v4l2_control *ctrl)
580{
581 int data;
582
583 switch (ctrl->id) {
584 case V4L2_CID_VFLIP:
585 data = reg_read(icd, MT9V022_READ_MODE);
586 if (data < 0)
587 return -EIO;
588 ctrl->value = !!(data & 0x10);
589 break;
590 case V4L2_CID_HFLIP:
591 data = reg_read(icd, MT9V022_READ_MODE);
592 if (data < 0)
593 return -EIO;
594 ctrl->value = !!(data & 0x20);
595 break;
596 case V4L2_CID_EXPOSURE_AUTO:
597 data = reg_read(icd, MT9V022_AEC_AGC_ENABLE);
598 if (data < 0)
599 return -EIO;
600 ctrl->value = !!(data & 0x1);
601 break;
602 case V4L2_CID_AUTOGAIN:
603 data = reg_read(icd, MT9V022_AEC_AGC_ENABLE);
604 if (data < 0)
605 return -EIO;
606 ctrl->value = !!(data & 0x2);
607 break;
608 }
609 return 0;
610}
611
612static int mt9v022_set_control(struct soc_camera_device *icd,
613 struct v4l2_control *ctrl)
614{
615 int data;
616 const struct v4l2_queryctrl *qctrl;
617
618 qctrl = soc_camera_find_qctrl(&mt9v022_ops, ctrl->id);
619
620 if (!qctrl)
621 return -EINVAL;
622
623 switch (ctrl->id) {
624 case V4L2_CID_VFLIP:
625 if (ctrl->value)
626 data = reg_set(icd, MT9V022_READ_MODE, 0x10);
627 else
628 data = reg_clear(icd, MT9V022_READ_MODE, 0x10);
629 if (data < 0)
630 return -EIO;
631 break;
632 case V4L2_CID_HFLIP:
633 if (ctrl->value)
634 data = reg_set(icd, MT9V022_READ_MODE, 0x20);
635 else
636 data = reg_clear(icd, MT9V022_READ_MODE, 0x20);
637 if (data < 0)
638 return -EIO;
639 break;
640 case V4L2_CID_GAIN:
641 /* mt9v022 has minimum == default */
642 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
643 return -EINVAL;
644 else {
645 unsigned long range = qctrl->maximum - qctrl->minimum;
646 /* Datasheet says 16 to 64. autogain only works properly
647 * after setting gain to maximum 14. Larger values
648 * produce "white fly" noise effect. On the whole,
649 * manually setting analog gain does no good. */
650 unsigned long gain = ((ctrl->value - qctrl->minimum) *
651 10 + range / 2) / range + 4;
652 if (gain >= 32)
653 gain &= ~1;
654 /* The user wants to set gain manually, hope, she
655 * knows, what she's doing... Switch AGC off. */
656
657 if (reg_clear(icd, MT9V022_AEC_AGC_ENABLE, 0x2) < 0)
658 return -EIO;
659
660 dev_info(&icd->dev, "Setting gain from %d to %lu\n",
661 reg_read(icd, MT9V022_ANALOG_GAIN), gain);
662 if (reg_write(icd, MT9V022_ANALOG_GAIN, gain) < 0)
663 return -EIO;
664 icd->gain = ctrl->value;
665 }
666 break;
667 case V4L2_CID_EXPOSURE:
668 /* mt9v022 has maximum == default */
669 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
670 return -EINVAL;
671 else {
672 unsigned long range = qctrl->maximum - qctrl->minimum;
673 unsigned long shutter = ((ctrl->value - qctrl->minimum) *
674 479 + range / 2) / range + 1;
675 /* The user wants to set shutter width manually, hope,
676 * she knows, what she's doing... Switch AEC off. */
677
678 if (reg_clear(icd, MT9V022_AEC_AGC_ENABLE, 0x1) < 0)
679 return -EIO;
680
681 dev_dbg(&icd->dev, "Shutter width from %d to %lu\n",
682 reg_read(icd, MT9V022_TOTAL_SHUTTER_WIDTH),
683 shutter);
684 if (reg_write(icd, MT9V022_TOTAL_SHUTTER_WIDTH,
685 shutter) < 0)
686 return -EIO;
687 icd->exposure = ctrl->value;
688 }
689 break;
690 case V4L2_CID_AUTOGAIN:
691 if (ctrl->value)
692 data = reg_set(icd, MT9V022_AEC_AGC_ENABLE, 0x2);
693 else
694 data = reg_clear(icd, MT9V022_AEC_AGC_ENABLE, 0x2);
695 if (data < 0)
696 return -EIO;
697 break;
698 case V4L2_CID_EXPOSURE_AUTO:
699 if (ctrl->value)
700 data = reg_set(icd, MT9V022_AEC_AGC_ENABLE, 0x1);
701 else
702 data = reg_clear(icd, MT9V022_AEC_AGC_ENABLE, 0x1);
703 if (data < 0)
704 return -EIO;
705 break;
706 }
707 return 0;
708}
709
710/* Interface active, can use i2c. If it fails, it can indeed mean, that
711 * this wasn't our capture interface, so, we wait for the right one */
712static int mt9v022_video_probe(struct soc_camera_device *icd)
713{
714 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
297a7ef7 715 struct soc_camera_link *icl = mt9v022->client->dev.platform_data;
7397bfbe
GL		 716 s32 data;
717 int ret;
718
719 if (!icd->dev.parent ||
720 to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
721 return -ENODEV;
722
723 /* Read out the chip version register */
724 data = reg_read(icd, MT9V022_CHIP_VERSION);
725
726 /* must be 0x1311 or 0x1313 */
727 if (data != 0x1311 && data != 0x1313) {
728 ret = -ENODEV;
729 dev_info(&icd->dev, "No MT9V022 detected, ID register 0x%x\n",
730 data);
731 goto ei2c;
732 }
733
734 /* Soft reset */
735 ret = reg_write(icd, MT9V022_RESET, 1);
736 if (ret < 0)
737 goto ei2c;
738 /* 15 clock cycles */
739 udelay(200);
740 if (reg_read(icd, MT9V022_RESET)) {
741 dev_err(&icd->dev, "Resetting MT9V022 failed!\n");
742 goto ei2c;
743 }
744
745 /* Set monochrome or colour sensor type */
746 if (sensor_type && (!strcmp("colour", sensor_type) ||
747 !strcmp("color", sensor_type))) {
748 ret = reg_write(icd, MT9V022_PIXEL_OPERATION_MODE, 4 | 0x11);
749 mt9v022->model = V4L2_IDENT_MT9V022IX7ATC;
26f1b942 750 icd->formats = mt9v022_colour_formats;
297a7ef7 751 if (gpio_is_valid(icl->gpio))
26f1b942 752 icd->num_formats = ARRAY_SIZE(mt9v022_colour_formats);
bb55de3b 753 else
26f1b942 754 icd->num_formats = 1;
7397bfbe
GL		 755 } else {
756 ret = reg_write(icd, MT9V022_PIXEL_OPERATION_MODE, 0x11);
757 mt9v022->model = V4L2_IDENT_MT9V022IX7ATM;
26f1b942 758 icd->formats = mt9v022_monochrome_formats;
297a7ef7 759 if (gpio_is_valid(icl->gpio))
26f1b942 760 icd->num_formats = ARRAY_SIZE(mt9v022_monochrome_formats);
bb55de3b 761 else
26f1b942 762 icd->num_formats = 1;
7397bfbe
GL		 763 }
764
11211641 765 if (!ret)
7397bfbe
GL		 766 ret = soc_camera_video_start(icd);
767 if (ret < 0)
768 goto eisis;
769
770 dev_info(&icd->dev, "Detected a MT9V022 chip ID %x, %s sensor\n",
771 data, mt9v022->model == V4L2_IDENT_MT9V022IX7ATM ?
772 "monochrome" : "colour");
773
774 return 0;
775
776eisis:
777ei2c:
778 return ret;
779}
780
781static void mt9v022_video_remove(struct soc_camera_device *icd)
782{
783 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
784
785 dev_dbg(&icd->dev, "Video %x removed: %p, %p\n", mt9v022->client->addr,
a85bdace
GL		 786 icd->dev.parent, icd->vdev);
787 soc_camera_video_stop(icd);
7397bfbe
GL		 788}
789
d2653e92
JD		 790static int mt9v022_probe(struct i2c_client *client,
791 const struct i2c_device_id *did)
7397bfbe
GL		 792{
793 struct mt9v022 *mt9v022;
794 struct soc_camera_device *icd;
795 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
796 struct soc_camera_link *icl = client->dev.platform_data;
797 int ret;
798
799 if (!icl) {
800 dev_err(&client->dev, "MT9V022 driver needs platform data\n");
801 return -EINVAL;
802 }
803
804 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
805 dev_warn(&adapter->dev,
806 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
807 return -EIO;
808 }
809
810 mt9v022 = kzalloc(sizeof(struct mt9v022), GFP_KERNEL);
811 if (!mt9v022)
812 return -ENOMEM;
813
814 mt9v022->chip_control = MT9V022_CHIP_CONTROL_DEFAULT;
815 mt9v022->client = client;
816 i2c_set_clientdata(client, mt9v022);
817
818 icd = &mt9v022->icd;
7397bfbe
GL		 819 icd->ops = &mt9v022_ops;
820 icd->control = &client->dev;
821 icd->x_min = 1;
822 icd->y_min = 4;
823 icd->x_current = 1;
824 icd->y_current = 4;
825 icd->width_min = 48;
826 icd->width_max = 752;
827 icd->height_min = 32;
828 icd->height_max = 480;
829 icd->y_skip_top = 1;
830 icd->iface = icl->bus_id;
831 /* Default datawidth - this is the only width this camera (normally)
832 * supports. It is only with extra logic that it can support
833 * other widths. Therefore it seems to be a sensible default. */
834 mt9v022->datawidth = 10;
835
836 ret = bus_switch_request(mt9v022, icl);
837 if (ret)
838 goto eswinit;
839
840 ret = soc_camera_device_register(icd);
841 if (ret)
842 goto eisdr;
843
844 return 0;
845
846eisdr:
847 bus_switch_release(mt9v022);
848eswinit:
849 kfree(mt9v022);
850 return ret;
851}
852
853static int mt9v022_remove(struct i2c_client *client)
854{
855 struct mt9v022 *mt9v022 = i2c_get_clientdata(client);
856
857 soc_camera_device_unregister(&mt9v022->icd);
858 bus_switch_release(mt9v022);
859 kfree(mt9v022);
860
861 return 0;
862}
3760f736
JD		 863static const struct i2c_device_id mt9v022_id[] = {
864 { "mt9v022", 0 },
865 { }
866};
867MODULE_DEVICE_TABLE(i2c, mt9v022_id);
868
7397bfbe
GL		 869static struct i2c_driver mt9v022_i2c_driver = {
870 .driver = {
871 .name = "mt9v022",
872 },
873 .probe = mt9v022_probe,
874 .remove = mt9v022_remove,
3760f736 875 .id_table = mt9v022_id,
7397bfbe
GL		 876};
877
878static int __init mt9v022_mod_init(void)
879{
880 return i2c_add_driver(&mt9v022_i2c_driver);
881}
882
883static void __exit mt9v022_mod_exit(void)
884{
885 i2c_del_driver(&mt9v022_i2c_driver);
886}
887
888module_init(mt9v022_mod_init);
889module_exit(mt9v022_mod_exit);
890
891MODULE_DESCRIPTION("Micron MT9V022 Camera driver");
892MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
893MODULE_LICENSE("GPL");