Detlev Casanova | 0f2ce16 | 2011-04-05 09:06:21 -0300 | [diff] [blame^] | 1 | /* |
| 2 | * Driver for MT9V032 CMOS Image Sensor from Micron |
| 3 | * |
| 4 | * Copyright (C) 2010, Laurent Pinchart <laurent.pinchart@ideasonboard.com> |
| 5 | * |
| 6 | * Based on the MT9M001 driver, |
| 7 | * |
| 8 | * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de> |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License version 2 as |
| 12 | * published by the Free Software Foundation. |
| 13 | */ |
| 14 | |
| 15 | #include <linux/delay.h> |
| 16 | #include <linux/i2c.h> |
| 17 | #include <linux/log2.h> |
| 18 | #include <linux/mutex.h> |
| 19 | #include <linux/slab.h> |
| 20 | #include <linux/videodev2.h> |
| 21 | #include <linux/v4l2-mediabus.h> |
| 22 | |
| 23 | #include <media/mt9v032.h> |
| 24 | #include <media/v4l2-ctrls.h> |
| 25 | #include <media/v4l2-device.h> |
| 26 | #include <media/v4l2-subdev.h> |
| 27 | |
| 28 | #define MT9V032_PIXEL_ARRAY_HEIGHT 492 |
| 29 | #define MT9V032_PIXEL_ARRAY_WIDTH 782 |
| 30 | |
| 31 | #define MT9V032_CHIP_VERSION 0x00 |
| 32 | #define MT9V032_CHIP_ID_REV1 0x1311 |
| 33 | #define MT9V032_CHIP_ID_REV3 0x1313 |
| 34 | #define MT9V032_ROW_START 0x01 |
| 35 | #define MT9V032_ROW_START_MIN 4 |
| 36 | #define MT9V032_ROW_START_DEF 10 |
| 37 | #define MT9V032_ROW_START_MAX 482 |
| 38 | #define MT9V032_COLUMN_START 0x02 |
| 39 | #define MT9V032_COLUMN_START_MIN 1 |
| 40 | #define MT9V032_COLUMN_START_DEF 2 |
| 41 | #define MT9V032_COLUMN_START_MAX 752 |
| 42 | #define MT9V032_WINDOW_HEIGHT 0x03 |
| 43 | #define MT9V032_WINDOW_HEIGHT_MIN 1 |
| 44 | #define MT9V032_WINDOW_HEIGHT_DEF 480 |
| 45 | #define MT9V032_WINDOW_HEIGHT_MAX 480 |
| 46 | #define MT9V032_WINDOW_WIDTH 0x04 |
| 47 | #define MT9V032_WINDOW_WIDTH_MIN 1 |
| 48 | #define MT9V032_WINDOW_WIDTH_DEF 752 |
| 49 | #define MT9V032_WINDOW_WIDTH_MAX 752 |
| 50 | #define MT9V032_HORIZONTAL_BLANKING 0x05 |
| 51 | #define MT9V032_HORIZONTAL_BLANKING_MIN 43 |
| 52 | #define MT9V032_HORIZONTAL_BLANKING_MAX 1023 |
| 53 | #define MT9V032_VERTICAL_BLANKING 0x06 |
| 54 | #define MT9V032_VERTICAL_BLANKING_MIN 4 |
| 55 | #define MT9V032_VERTICAL_BLANKING_MAX 3000 |
| 56 | #define MT9V032_CHIP_CONTROL 0x07 |
| 57 | #define MT9V032_CHIP_CONTROL_MASTER_MODE (1 << 3) |
| 58 | #define MT9V032_CHIP_CONTROL_DOUT_ENABLE (1 << 7) |
| 59 | #define MT9V032_CHIP_CONTROL_SEQUENTIAL (1 << 8) |
| 60 | #define MT9V032_SHUTTER_WIDTH1 0x08 |
| 61 | #define MT9V032_SHUTTER_WIDTH2 0x09 |
| 62 | #define MT9V032_SHUTTER_WIDTH_CONTROL 0x0a |
| 63 | #define MT9V032_TOTAL_SHUTTER_WIDTH 0x0b |
| 64 | #define MT9V032_TOTAL_SHUTTER_WIDTH_MIN 1 |
| 65 | #define MT9V032_TOTAL_SHUTTER_WIDTH_DEF 480 |
| 66 | #define MT9V032_TOTAL_SHUTTER_WIDTH_MAX 32767 |
| 67 | #define MT9V032_RESET 0x0c |
| 68 | #define MT9V032_READ_MODE 0x0d |
| 69 | #define MT9V032_READ_MODE_ROW_BIN_MASK (3 << 0) |
| 70 | #define MT9V032_READ_MODE_ROW_BIN_SHIFT 0 |
| 71 | #define MT9V032_READ_MODE_COLUMN_BIN_MASK (3 << 2) |
| 72 | #define MT9V032_READ_MODE_COLUMN_BIN_SHIFT 2 |
| 73 | #define MT9V032_READ_MODE_ROW_FLIP (1 << 4) |
| 74 | #define MT9V032_READ_MODE_COLUMN_FLIP (1 << 5) |
| 75 | #define MT9V032_READ_MODE_DARK_COLUMNS (1 << 6) |
| 76 | #define MT9V032_READ_MODE_DARK_ROWS (1 << 7) |
| 77 | #define MT9V032_PIXEL_OPERATION_MODE 0x0f |
| 78 | #define MT9V032_PIXEL_OPERATION_MODE_COLOR (1 << 2) |
| 79 | #define MT9V032_PIXEL_OPERATION_MODE_HDR (1 << 6) |
| 80 | #define MT9V032_ANALOG_GAIN 0x35 |
| 81 | #define MT9V032_ANALOG_GAIN_MIN 16 |
| 82 | #define MT9V032_ANALOG_GAIN_DEF 16 |
| 83 | #define MT9V032_ANALOG_GAIN_MAX 64 |
| 84 | #define MT9V032_MAX_ANALOG_GAIN 0x36 |
| 85 | #define MT9V032_MAX_ANALOG_GAIN_MAX 127 |
| 86 | #define MT9V032_FRAME_DARK_AVERAGE 0x42 |
| 87 | #define MT9V032_DARK_AVG_THRESH 0x46 |
| 88 | #define MT9V032_DARK_AVG_LOW_THRESH_MASK (255 << 0) |
| 89 | #define MT9V032_DARK_AVG_LOW_THRESH_SHIFT 0 |
| 90 | #define MT9V032_DARK_AVG_HIGH_THRESH_MASK (255 << 8) |
| 91 | #define MT9V032_DARK_AVG_HIGH_THRESH_SHIFT 8 |
| 92 | #define MT9V032_ROW_NOISE_CORR_CONTROL 0x70 |
| 93 | #define MT9V032_ROW_NOISE_CORR_ENABLE (1 << 5) |
| 94 | #define MT9V032_ROW_NOISE_CORR_USE_BLK_AVG (1 << 7) |
| 95 | #define MT9V032_PIXEL_CLOCK 0x74 |
| 96 | #define MT9V032_PIXEL_CLOCK_INV_LINE (1 << 0) |
| 97 | #define MT9V032_PIXEL_CLOCK_INV_FRAME (1 << 1) |
| 98 | #define MT9V032_PIXEL_CLOCK_XOR_LINE (1 << 2) |
| 99 | #define MT9V032_PIXEL_CLOCK_CONT_LINE (1 << 3) |
| 100 | #define MT9V032_PIXEL_CLOCK_INV_PXL_CLK (1 << 4) |
| 101 | #define MT9V032_TEST_PATTERN 0x7f |
| 102 | #define MT9V032_TEST_PATTERN_DATA_MASK (1023 << 0) |
| 103 | #define MT9V032_TEST_PATTERN_DATA_SHIFT 0 |
| 104 | #define MT9V032_TEST_PATTERN_USE_DATA (1 << 10) |
| 105 | #define MT9V032_TEST_PATTERN_GRAY_MASK (3 << 11) |
| 106 | #define MT9V032_TEST_PATTERN_GRAY_NONE (0 << 11) |
| 107 | #define MT9V032_TEST_PATTERN_GRAY_VERTICAL (1 << 11) |
| 108 | #define MT9V032_TEST_PATTERN_GRAY_HORIZONTAL (2 << 11) |
| 109 | #define MT9V032_TEST_PATTERN_GRAY_DIAGONAL (3 << 11) |
| 110 | #define MT9V032_TEST_PATTERN_ENABLE (1 << 13) |
| 111 | #define MT9V032_TEST_PATTERN_FLIP (1 << 14) |
| 112 | #define MT9V032_AEC_AGC_ENABLE 0xaf |
| 113 | #define MT9V032_AEC_ENABLE (1 << 0) |
| 114 | #define MT9V032_AGC_ENABLE (1 << 1) |
| 115 | #define MT9V032_THERMAL_INFO 0xc1 |
| 116 | |
| 117 | struct mt9v032 { |
| 118 | struct v4l2_subdev subdev; |
| 119 | struct media_pad pad; |
| 120 | |
| 121 | struct v4l2_mbus_framefmt format; |
| 122 | struct v4l2_rect crop; |
| 123 | |
| 124 | struct v4l2_ctrl_handler ctrls; |
| 125 | |
| 126 | struct mutex power_lock; |
| 127 | int power_count; |
| 128 | |
| 129 | struct mt9v032_platform_data *pdata; |
| 130 | u16 chip_control; |
| 131 | u16 aec_agc; |
| 132 | }; |
| 133 | |
| 134 | static struct mt9v032 *to_mt9v032(struct v4l2_subdev *sd) |
| 135 | { |
| 136 | return container_of(sd, struct mt9v032, subdev); |
| 137 | } |
| 138 | |
| 139 | static int mt9v032_read(struct i2c_client *client, const u8 reg) |
| 140 | { |
| 141 | s32 data = i2c_smbus_read_word_data(client, reg); |
| 142 | dev_dbg(&client->dev, "%s: read 0x%04x from 0x%02x\n", __func__, |
| 143 | swab16(data), reg); |
| 144 | return data < 0 ? data : swab16(data); |
| 145 | } |
| 146 | |
| 147 | static int mt9v032_write(struct i2c_client *client, const u8 reg, |
| 148 | const u16 data) |
| 149 | { |
| 150 | dev_dbg(&client->dev, "%s: writing 0x%04x to 0x%02x\n", __func__, |
| 151 | data, reg); |
| 152 | return i2c_smbus_write_word_data(client, reg, swab16(data)); |
| 153 | } |
| 154 | |
| 155 | static int mt9v032_set_chip_control(struct mt9v032 *mt9v032, u16 clear, u16 set) |
| 156 | { |
| 157 | struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev); |
| 158 | u16 value = (mt9v032->chip_control & ~clear) | set; |
| 159 | int ret; |
| 160 | |
| 161 | ret = mt9v032_write(client, MT9V032_CHIP_CONTROL, value); |
| 162 | if (ret < 0) |
| 163 | return ret; |
| 164 | |
| 165 | mt9v032->chip_control = value; |
| 166 | return 0; |
| 167 | } |
| 168 | |
| 169 | static int |
| 170 | mt9v032_update_aec_agc(struct mt9v032 *mt9v032, u16 which, int enable) |
| 171 | { |
| 172 | struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev); |
| 173 | u16 value = mt9v032->aec_agc; |
| 174 | int ret; |
| 175 | |
| 176 | if (enable) |
| 177 | value |= which; |
| 178 | else |
| 179 | value &= ~which; |
| 180 | |
| 181 | ret = mt9v032_write(client, MT9V032_AEC_AGC_ENABLE, value); |
| 182 | if (ret < 0) |
| 183 | return ret; |
| 184 | |
| 185 | mt9v032->aec_agc = value; |
| 186 | return 0; |
| 187 | } |
| 188 | |
| 189 | static int mt9v032_power_on(struct mt9v032 *mt9v032) |
| 190 | { |
| 191 | struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev); |
| 192 | int ret; |
| 193 | |
| 194 | if (mt9v032->pdata->set_clock) { |
| 195 | mt9v032->pdata->set_clock(&mt9v032->subdev, 25000000); |
| 196 | udelay(1); |
| 197 | } |
| 198 | |
| 199 | /* Reset the chip and stop data read out */ |
| 200 | ret = mt9v032_write(client, MT9V032_RESET, 1); |
| 201 | if (ret < 0) |
| 202 | return ret; |
| 203 | |
| 204 | ret = mt9v032_write(client, MT9V032_RESET, 0); |
| 205 | if (ret < 0) |
| 206 | return ret; |
| 207 | |
| 208 | return mt9v032_write(client, MT9V032_CHIP_CONTROL, 0); |
| 209 | } |
| 210 | |
| 211 | static void mt9v032_power_off(struct mt9v032 *mt9v032) |
| 212 | { |
| 213 | if (mt9v032->pdata->set_clock) |
| 214 | mt9v032->pdata->set_clock(&mt9v032->subdev, 0); |
| 215 | } |
| 216 | |
| 217 | static int __mt9v032_set_power(struct mt9v032 *mt9v032, bool on) |
| 218 | { |
| 219 | struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev); |
| 220 | int ret; |
| 221 | |
| 222 | if (!on) { |
| 223 | mt9v032_power_off(mt9v032); |
| 224 | return 0; |
| 225 | } |
| 226 | |
| 227 | ret = mt9v032_power_on(mt9v032); |
| 228 | if (ret < 0) |
| 229 | return ret; |
| 230 | |
| 231 | /* Configure the pixel clock polarity */ |
| 232 | if (mt9v032->pdata && mt9v032->pdata->clk_pol) { |
| 233 | ret = mt9v032_write(client, MT9V032_PIXEL_CLOCK, |
| 234 | MT9V032_PIXEL_CLOCK_INV_PXL_CLK); |
| 235 | if (ret < 0) |
| 236 | return ret; |
| 237 | } |
| 238 | |
| 239 | /* Disable the noise correction algorithm and restore the controls. */ |
| 240 | ret = mt9v032_write(client, MT9V032_ROW_NOISE_CORR_CONTROL, 0); |
| 241 | if (ret < 0) |
| 242 | return ret; |
| 243 | |
| 244 | return v4l2_ctrl_handler_setup(&mt9v032->ctrls); |
| 245 | } |
| 246 | |
| 247 | /* ----------------------------------------------------------------------------- |
| 248 | * V4L2 subdev video operations |
| 249 | */ |
| 250 | |
| 251 | static struct v4l2_mbus_framefmt * |
| 252 | __mt9v032_get_pad_format(struct mt9v032 *mt9v032, struct v4l2_subdev_fh *fh, |
| 253 | unsigned int pad, enum v4l2_subdev_format_whence which) |
| 254 | { |
| 255 | switch (which) { |
| 256 | case V4L2_SUBDEV_FORMAT_TRY: |
| 257 | return v4l2_subdev_get_try_format(fh, pad); |
| 258 | case V4L2_SUBDEV_FORMAT_ACTIVE: |
| 259 | return &mt9v032->format; |
| 260 | default: |
| 261 | return NULL; |
| 262 | } |
| 263 | } |
| 264 | |
| 265 | static struct v4l2_rect * |
| 266 | __mt9v032_get_pad_crop(struct mt9v032 *mt9v032, struct v4l2_subdev_fh *fh, |
| 267 | unsigned int pad, enum v4l2_subdev_format_whence which) |
| 268 | { |
| 269 | switch (which) { |
| 270 | case V4L2_SUBDEV_FORMAT_TRY: |
| 271 | return v4l2_subdev_get_try_crop(fh, pad); |
| 272 | case V4L2_SUBDEV_FORMAT_ACTIVE: |
| 273 | return &mt9v032->crop; |
| 274 | default: |
| 275 | return NULL; |
| 276 | } |
| 277 | } |
| 278 | |
| 279 | static int mt9v032_s_stream(struct v4l2_subdev *subdev, int enable) |
| 280 | { |
| 281 | const u16 mode = MT9V032_CHIP_CONTROL_MASTER_MODE |
| 282 | | MT9V032_CHIP_CONTROL_DOUT_ENABLE |
| 283 | | MT9V032_CHIP_CONTROL_SEQUENTIAL; |
| 284 | struct i2c_client *client = v4l2_get_subdevdata(subdev); |
| 285 | struct mt9v032 *mt9v032 = to_mt9v032(subdev); |
| 286 | struct v4l2_mbus_framefmt *format = &mt9v032->format; |
| 287 | struct v4l2_rect *crop = &mt9v032->crop; |
| 288 | unsigned int hratio; |
| 289 | unsigned int vratio; |
| 290 | int ret; |
| 291 | |
| 292 | if (!enable) |
| 293 | return mt9v032_set_chip_control(mt9v032, mode, 0); |
| 294 | |
| 295 | /* Configure the window size and row/column bin */ |
| 296 | hratio = DIV_ROUND_CLOSEST(crop->width, format->width); |
| 297 | vratio = DIV_ROUND_CLOSEST(crop->height, format->height); |
| 298 | |
| 299 | ret = mt9v032_write(client, MT9V032_READ_MODE, |
| 300 | (hratio - 1) << MT9V032_READ_MODE_ROW_BIN_SHIFT | |
| 301 | (vratio - 1) << MT9V032_READ_MODE_COLUMN_BIN_SHIFT); |
| 302 | if (ret < 0) |
| 303 | return ret; |
| 304 | |
| 305 | ret = mt9v032_write(client, MT9V032_COLUMN_START, crop->left); |
| 306 | if (ret < 0) |
| 307 | return ret; |
| 308 | |
| 309 | ret = mt9v032_write(client, MT9V032_ROW_START, crop->top); |
| 310 | if (ret < 0) |
| 311 | return ret; |
| 312 | |
| 313 | ret = mt9v032_write(client, MT9V032_WINDOW_WIDTH, crop->width); |
| 314 | if (ret < 0) |
| 315 | return ret; |
| 316 | |
| 317 | ret = mt9v032_write(client, MT9V032_WINDOW_HEIGHT, crop->height); |
| 318 | if (ret < 0) |
| 319 | return ret; |
| 320 | |
| 321 | ret = mt9v032_write(client, MT9V032_HORIZONTAL_BLANKING, |
| 322 | max(43, 660 - crop->width)); |
| 323 | if (ret < 0) |
| 324 | return ret; |
| 325 | |
| 326 | /* Switch to master "normal" mode */ |
| 327 | return mt9v032_set_chip_control(mt9v032, 0, mode); |
| 328 | } |
| 329 | |
| 330 | static int mt9v032_enum_mbus_code(struct v4l2_subdev *subdev, |
| 331 | struct v4l2_subdev_fh *fh, |
| 332 | struct v4l2_subdev_mbus_code_enum *code) |
| 333 | { |
| 334 | if (code->index > 0) |
| 335 | return -EINVAL; |
| 336 | |
| 337 | code->code = V4L2_MBUS_FMT_SGRBG10_1X10; |
| 338 | return 0; |
| 339 | } |
| 340 | |
| 341 | static int mt9v032_enum_frame_size(struct v4l2_subdev *subdev, |
| 342 | struct v4l2_subdev_fh *fh, |
| 343 | struct v4l2_subdev_frame_size_enum *fse) |
| 344 | { |
| 345 | if (fse->index >= 8 || fse->code != V4L2_MBUS_FMT_SGRBG10_1X10) |
| 346 | return -EINVAL; |
| 347 | |
| 348 | fse->min_width = MT9V032_WINDOW_WIDTH_DEF / fse->index; |
| 349 | fse->max_width = fse->min_width; |
| 350 | fse->min_height = MT9V032_WINDOW_HEIGHT_DEF / fse->index; |
| 351 | fse->max_height = fse->min_height; |
| 352 | |
| 353 | return 0; |
| 354 | } |
| 355 | |
| 356 | static int mt9v032_get_format(struct v4l2_subdev *subdev, |
| 357 | struct v4l2_subdev_fh *fh, |
| 358 | struct v4l2_subdev_format *format) |
| 359 | { |
| 360 | struct mt9v032 *mt9v032 = to_mt9v032(subdev); |
| 361 | |
| 362 | format->format = *__mt9v032_get_pad_format(mt9v032, fh, format->pad, |
| 363 | format->which); |
| 364 | return 0; |
| 365 | } |
| 366 | |
| 367 | static int mt9v032_set_format(struct v4l2_subdev *subdev, |
| 368 | struct v4l2_subdev_fh *fh, |
| 369 | struct v4l2_subdev_format *format) |
| 370 | { |
| 371 | struct mt9v032 *mt9v032 = to_mt9v032(subdev); |
| 372 | struct v4l2_mbus_framefmt *__format; |
| 373 | struct v4l2_rect *__crop; |
| 374 | unsigned int width; |
| 375 | unsigned int height; |
| 376 | unsigned int hratio; |
| 377 | unsigned int vratio; |
| 378 | |
| 379 | __crop = __mt9v032_get_pad_crop(mt9v032, fh, format->pad, |
| 380 | format->which); |
| 381 | |
| 382 | /* Clamp the width and height to avoid dividing by zero. */ |
| 383 | width = clamp_t(unsigned int, ALIGN(format->format.width, 2), |
| 384 | max(__crop->width / 8, MT9V032_WINDOW_WIDTH_MIN), |
| 385 | __crop->width); |
| 386 | height = clamp_t(unsigned int, ALIGN(format->format.height, 2), |
| 387 | max(__crop->height / 8, MT9V032_WINDOW_HEIGHT_MIN), |
| 388 | __crop->height); |
| 389 | |
| 390 | hratio = DIV_ROUND_CLOSEST(__crop->width, width); |
| 391 | vratio = DIV_ROUND_CLOSEST(__crop->height, height); |
| 392 | |
| 393 | __format = __mt9v032_get_pad_format(mt9v032, fh, format->pad, |
| 394 | format->which); |
| 395 | __format->width = __crop->width / hratio; |
| 396 | __format->height = __crop->height / vratio; |
| 397 | |
| 398 | format->format = *__format; |
| 399 | |
| 400 | return 0; |
| 401 | } |
| 402 | |
| 403 | static int mt9v032_get_crop(struct v4l2_subdev *subdev, |
| 404 | struct v4l2_subdev_fh *fh, |
| 405 | struct v4l2_subdev_crop *crop) |
| 406 | { |
| 407 | struct mt9v032 *mt9v032 = to_mt9v032(subdev); |
| 408 | |
| 409 | crop->rect = *__mt9v032_get_pad_crop(mt9v032, fh, crop->pad, |
| 410 | crop->which); |
| 411 | return 0; |
| 412 | } |
| 413 | |
| 414 | static int mt9v032_set_crop(struct v4l2_subdev *subdev, |
| 415 | struct v4l2_subdev_fh *fh, |
| 416 | struct v4l2_subdev_crop *crop) |
| 417 | { |
| 418 | struct mt9v032 *mt9v032 = to_mt9v032(subdev); |
| 419 | struct v4l2_mbus_framefmt *__format; |
| 420 | struct v4l2_rect *__crop; |
| 421 | struct v4l2_rect rect; |
| 422 | |
| 423 | /* Clamp the crop rectangle boundaries and align them to a multiple of 2 |
| 424 | * pixels. |
| 425 | */ |
| 426 | rect.left = clamp(ALIGN(crop->rect.left, 2), |
| 427 | MT9V032_COLUMN_START_MIN, |
| 428 | MT9V032_COLUMN_START_MAX); |
| 429 | rect.top = clamp(ALIGN(crop->rect.top, 2), |
| 430 | MT9V032_ROW_START_MIN, |
| 431 | MT9V032_ROW_START_MAX); |
| 432 | rect.width = clamp(ALIGN(crop->rect.width, 2), |
| 433 | MT9V032_WINDOW_WIDTH_MIN, |
| 434 | MT9V032_WINDOW_WIDTH_MAX); |
| 435 | rect.height = clamp(ALIGN(crop->rect.height, 2), |
| 436 | MT9V032_WINDOW_HEIGHT_MIN, |
| 437 | MT9V032_WINDOW_HEIGHT_MAX); |
| 438 | |
| 439 | rect.width = min(rect.width, MT9V032_PIXEL_ARRAY_WIDTH - rect.left); |
| 440 | rect.height = min(rect.height, MT9V032_PIXEL_ARRAY_HEIGHT - rect.top); |
| 441 | |
| 442 | __crop = __mt9v032_get_pad_crop(mt9v032, fh, crop->pad, crop->which); |
| 443 | |
| 444 | if (rect.width != __crop->width || rect.height != __crop->height) { |
| 445 | /* Reset the output image size if the crop rectangle size has |
| 446 | * been modified. |
| 447 | */ |
| 448 | __format = __mt9v032_get_pad_format(mt9v032, fh, crop->pad, |
| 449 | crop->which); |
| 450 | __format->width = rect.width; |
| 451 | __format->height = rect.height; |
| 452 | } |
| 453 | |
| 454 | *__crop = rect; |
| 455 | crop->rect = rect; |
| 456 | |
| 457 | return 0; |
| 458 | } |
| 459 | |
| 460 | /* ----------------------------------------------------------------------------- |
| 461 | * V4L2 subdev control operations |
| 462 | */ |
| 463 | |
| 464 | #define V4L2_CID_TEST_PATTERN (V4L2_CID_USER_BASE | 0x1001) |
| 465 | |
| 466 | static int mt9v032_s_ctrl(struct v4l2_ctrl *ctrl) |
| 467 | { |
| 468 | struct mt9v032 *mt9v032 = |
| 469 | container_of(ctrl->handler, struct mt9v032, ctrls); |
| 470 | struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev); |
| 471 | u16 data; |
| 472 | |
| 473 | switch (ctrl->id) { |
| 474 | case V4L2_CID_AUTOGAIN: |
| 475 | return mt9v032_update_aec_agc(mt9v032, MT9V032_AGC_ENABLE, |
| 476 | ctrl->val); |
| 477 | |
| 478 | case V4L2_CID_GAIN: |
| 479 | return mt9v032_write(client, MT9V032_ANALOG_GAIN, ctrl->val); |
| 480 | |
| 481 | case V4L2_CID_EXPOSURE_AUTO: |
| 482 | return mt9v032_update_aec_agc(mt9v032, MT9V032_AEC_ENABLE, |
| 483 | ctrl->val); |
| 484 | |
| 485 | case V4L2_CID_EXPOSURE: |
| 486 | return mt9v032_write(client, MT9V032_TOTAL_SHUTTER_WIDTH, |
| 487 | ctrl->val); |
| 488 | |
| 489 | case V4L2_CID_TEST_PATTERN: |
| 490 | switch (ctrl->val) { |
| 491 | case 0: |
| 492 | data = 0; |
| 493 | break; |
| 494 | case 1: |
| 495 | data = MT9V032_TEST_PATTERN_GRAY_VERTICAL |
| 496 | | MT9V032_TEST_PATTERN_ENABLE; |
| 497 | break; |
| 498 | case 2: |
| 499 | data = MT9V032_TEST_PATTERN_GRAY_HORIZONTAL |
| 500 | | MT9V032_TEST_PATTERN_ENABLE; |
| 501 | break; |
| 502 | case 3: |
| 503 | data = MT9V032_TEST_PATTERN_GRAY_DIAGONAL |
| 504 | | MT9V032_TEST_PATTERN_ENABLE; |
| 505 | break; |
| 506 | default: |
| 507 | data = (ctrl->val << MT9V032_TEST_PATTERN_DATA_SHIFT) |
| 508 | | MT9V032_TEST_PATTERN_USE_DATA |
| 509 | | MT9V032_TEST_PATTERN_ENABLE |
| 510 | | MT9V032_TEST_PATTERN_FLIP; |
| 511 | break; |
| 512 | } |
| 513 | |
| 514 | return mt9v032_write(client, MT9V032_TEST_PATTERN, data); |
| 515 | } |
| 516 | |
| 517 | return 0; |
| 518 | } |
| 519 | |
| 520 | static struct v4l2_ctrl_ops mt9v032_ctrl_ops = { |
| 521 | .s_ctrl = mt9v032_s_ctrl, |
| 522 | }; |
| 523 | |
| 524 | static const struct v4l2_ctrl_config mt9v032_ctrls[] = { |
| 525 | { |
| 526 | .ops = &mt9v032_ctrl_ops, |
| 527 | .id = V4L2_CID_TEST_PATTERN, |
| 528 | .type = V4L2_CTRL_TYPE_INTEGER, |
| 529 | .name = "Test pattern", |
| 530 | .min = 0, |
| 531 | .max = 1023, |
| 532 | .step = 1, |
| 533 | .def = 0, |
| 534 | .flags = 0, |
| 535 | } |
| 536 | }; |
| 537 | |
| 538 | /* ----------------------------------------------------------------------------- |
| 539 | * V4L2 subdev core operations |
| 540 | */ |
| 541 | |
| 542 | static int mt9v032_set_power(struct v4l2_subdev *subdev, int on) |
| 543 | { |
| 544 | struct mt9v032 *mt9v032 = to_mt9v032(subdev); |
| 545 | int ret = 0; |
| 546 | |
| 547 | mutex_lock(&mt9v032->power_lock); |
| 548 | |
| 549 | /* If the power count is modified from 0 to != 0 or from != 0 to 0, |
| 550 | * update the power state. |
| 551 | */ |
| 552 | if (mt9v032->power_count == !on) { |
| 553 | ret = __mt9v032_set_power(mt9v032, !!on); |
| 554 | if (ret < 0) |
| 555 | goto done; |
| 556 | } |
| 557 | |
| 558 | /* Update the power count. */ |
| 559 | mt9v032->power_count += on ? 1 : -1; |
| 560 | WARN_ON(mt9v032->power_count < 0); |
| 561 | |
| 562 | done: |
| 563 | mutex_unlock(&mt9v032->power_lock); |
| 564 | return ret; |
| 565 | } |
| 566 | |
| 567 | /* ----------------------------------------------------------------------------- |
| 568 | * V4L2 subdev internal operations |
| 569 | */ |
| 570 | |
| 571 | static int mt9v032_registered(struct v4l2_subdev *subdev) |
| 572 | { |
| 573 | struct i2c_client *client = v4l2_get_subdevdata(subdev); |
| 574 | struct mt9v032 *mt9v032 = to_mt9v032(subdev); |
| 575 | s32 data; |
| 576 | int ret; |
| 577 | |
| 578 | dev_info(&client->dev, "Probing MT9V032 at address 0x%02x\n", |
| 579 | client->addr); |
| 580 | |
| 581 | ret = mt9v032_power_on(mt9v032); |
| 582 | if (ret < 0) { |
| 583 | dev_err(&client->dev, "MT9V032 power up failed\n"); |
| 584 | return ret; |
| 585 | } |
| 586 | |
| 587 | /* Read and check the sensor version */ |
| 588 | data = mt9v032_read(client, MT9V032_CHIP_VERSION); |
| 589 | if (data != MT9V032_CHIP_ID_REV1 && data != MT9V032_CHIP_ID_REV3) { |
| 590 | dev_err(&client->dev, "MT9V032 not detected, wrong version " |
| 591 | "0x%04x\n", data); |
| 592 | return -ENODEV; |
| 593 | } |
| 594 | |
| 595 | mt9v032_power_off(mt9v032); |
| 596 | |
| 597 | dev_info(&client->dev, "MT9V032 detected at address 0x%02x\n", |
| 598 | client->addr); |
| 599 | |
| 600 | return ret; |
| 601 | } |
| 602 | |
| 603 | static int mt9v032_open(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh) |
| 604 | { |
| 605 | struct v4l2_mbus_framefmt *format; |
| 606 | struct v4l2_rect *crop; |
| 607 | |
| 608 | crop = v4l2_subdev_get_try_crop(fh, 0); |
| 609 | crop->left = MT9V032_COLUMN_START_DEF; |
| 610 | crop->top = MT9V032_ROW_START_DEF; |
| 611 | crop->width = MT9V032_WINDOW_WIDTH_DEF; |
| 612 | crop->height = MT9V032_WINDOW_HEIGHT_DEF; |
| 613 | |
| 614 | format = v4l2_subdev_get_try_format(fh, 0); |
| 615 | format->code = V4L2_MBUS_FMT_SGRBG10_1X10; |
| 616 | format->width = MT9V032_WINDOW_WIDTH_DEF; |
| 617 | format->height = MT9V032_WINDOW_HEIGHT_DEF; |
| 618 | format->field = V4L2_FIELD_NONE; |
| 619 | format->colorspace = V4L2_COLORSPACE_SRGB; |
| 620 | |
| 621 | return mt9v032_set_power(subdev, 1); |
| 622 | } |
| 623 | |
| 624 | static int mt9v032_close(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh) |
| 625 | { |
| 626 | return mt9v032_set_power(subdev, 0); |
| 627 | } |
| 628 | |
| 629 | static struct v4l2_subdev_core_ops mt9v032_subdev_core_ops = { |
| 630 | .s_power = mt9v032_set_power, |
| 631 | }; |
| 632 | |
| 633 | static struct v4l2_subdev_video_ops mt9v032_subdev_video_ops = { |
| 634 | .s_stream = mt9v032_s_stream, |
| 635 | }; |
| 636 | |
| 637 | static struct v4l2_subdev_pad_ops mt9v032_subdev_pad_ops = { |
| 638 | .enum_mbus_code = mt9v032_enum_mbus_code, |
| 639 | .enum_frame_size = mt9v032_enum_frame_size, |
| 640 | .get_fmt = mt9v032_get_format, |
| 641 | .set_fmt = mt9v032_set_format, |
| 642 | .get_crop = mt9v032_get_crop, |
| 643 | .set_crop = mt9v032_set_crop, |
| 644 | }; |
| 645 | |
| 646 | static struct v4l2_subdev_ops mt9v032_subdev_ops = { |
| 647 | .core = &mt9v032_subdev_core_ops, |
| 648 | .video = &mt9v032_subdev_video_ops, |
| 649 | .pad = &mt9v032_subdev_pad_ops, |
| 650 | }; |
| 651 | |
| 652 | static const struct v4l2_subdev_internal_ops mt9v032_subdev_internal_ops = { |
| 653 | .registered = mt9v032_registered, |
| 654 | .open = mt9v032_open, |
| 655 | .close = mt9v032_close, |
| 656 | }; |
| 657 | |
| 658 | /* ----------------------------------------------------------------------------- |
| 659 | * Driver initialization and probing |
| 660 | */ |
| 661 | |
| 662 | static int mt9v032_probe(struct i2c_client *client, |
| 663 | const struct i2c_device_id *did) |
| 664 | { |
| 665 | struct mt9v032 *mt9v032; |
| 666 | unsigned int i; |
| 667 | int ret; |
| 668 | |
| 669 | if (!i2c_check_functionality(client->adapter, |
| 670 | I2C_FUNC_SMBUS_WORD_DATA)) { |
| 671 | dev_warn(&client->adapter->dev, |
| 672 | "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n"); |
| 673 | return -EIO; |
| 674 | } |
| 675 | |
| 676 | mt9v032 = kzalloc(sizeof(*mt9v032), GFP_KERNEL); |
| 677 | if (!mt9v032) |
| 678 | return -ENOMEM; |
| 679 | |
| 680 | mutex_init(&mt9v032->power_lock); |
| 681 | mt9v032->pdata = client->dev.platform_data; |
| 682 | |
| 683 | v4l2_ctrl_handler_init(&mt9v032->ctrls, ARRAY_SIZE(mt9v032_ctrls) + 4); |
| 684 | |
| 685 | v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops, |
| 686 | V4L2_CID_AUTOGAIN, 0, 1, 1, 1); |
| 687 | v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops, |
| 688 | V4L2_CID_GAIN, MT9V032_ANALOG_GAIN_MIN, |
| 689 | MT9V032_ANALOG_GAIN_MAX, 1, MT9V032_ANALOG_GAIN_DEF); |
| 690 | v4l2_ctrl_new_std_menu(&mt9v032->ctrls, &mt9v032_ctrl_ops, |
| 691 | V4L2_CID_EXPOSURE_AUTO, V4L2_EXPOSURE_MANUAL, 0, |
| 692 | V4L2_EXPOSURE_AUTO); |
| 693 | v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops, |
| 694 | V4L2_CID_EXPOSURE, MT9V032_TOTAL_SHUTTER_WIDTH_MIN, |
| 695 | MT9V032_TOTAL_SHUTTER_WIDTH_MAX, 1, |
| 696 | MT9V032_TOTAL_SHUTTER_WIDTH_DEF); |
| 697 | |
| 698 | for (i = 0; i < ARRAY_SIZE(mt9v032_ctrls); ++i) |
| 699 | v4l2_ctrl_new_custom(&mt9v032->ctrls, &mt9v032_ctrls[i], NULL); |
| 700 | |
| 701 | mt9v032->subdev.ctrl_handler = &mt9v032->ctrls; |
| 702 | |
| 703 | if (mt9v032->ctrls.error) |
| 704 | printk(KERN_INFO "%s: control initialization error %d\n", |
| 705 | __func__, mt9v032->ctrls.error); |
| 706 | |
| 707 | mt9v032->crop.left = MT9V032_COLUMN_START_DEF; |
| 708 | mt9v032->crop.top = MT9V032_ROW_START_DEF; |
| 709 | mt9v032->crop.width = MT9V032_WINDOW_WIDTH_DEF; |
| 710 | mt9v032->crop.height = MT9V032_WINDOW_HEIGHT_DEF; |
| 711 | |
| 712 | mt9v032->format.code = V4L2_MBUS_FMT_SGRBG10_1X10; |
| 713 | mt9v032->format.width = MT9V032_WINDOW_WIDTH_DEF; |
| 714 | mt9v032->format.height = MT9V032_WINDOW_HEIGHT_DEF; |
| 715 | mt9v032->format.field = V4L2_FIELD_NONE; |
| 716 | mt9v032->format.colorspace = V4L2_COLORSPACE_SRGB; |
| 717 | |
| 718 | mt9v032->aec_agc = MT9V032_AEC_ENABLE | MT9V032_AGC_ENABLE; |
| 719 | |
| 720 | v4l2_i2c_subdev_init(&mt9v032->subdev, client, &mt9v032_subdev_ops); |
| 721 | mt9v032->subdev.internal_ops = &mt9v032_subdev_internal_ops; |
| 722 | mt9v032->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; |
| 723 | |
| 724 | mt9v032->pad.flags = MEDIA_PAD_FL_SOURCE; |
| 725 | ret = media_entity_init(&mt9v032->subdev.entity, 1, &mt9v032->pad, 0); |
| 726 | if (ret < 0) |
| 727 | kfree(mt9v032); |
| 728 | |
| 729 | return ret; |
| 730 | } |
| 731 | |
| 732 | static int mt9v032_remove(struct i2c_client *client) |
| 733 | { |
| 734 | struct v4l2_subdev *subdev = i2c_get_clientdata(client); |
| 735 | struct mt9v032 *mt9v032 = to_mt9v032(subdev); |
| 736 | |
| 737 | v4l2_device_unregister_subdev(subdev); |
| 738 | media_entity_cleanup(&subdev->entity); |
| 739 | kfree(mt9v032); |
| 740 | return 0; |
| 741 | } |
| 742 | |
| 743 | static const struct i2c_device_id mt9v032_id[] = { |
| 744 | { "mt9v032", 0 }, |
| 745 | { } |
| 746 | }; |
| 747 | MODULE_DEVICE_TABLE(i2c, mt9v032_id); |
| 748 | |
| 749 | static struct i2c_driver mt9v032_driver = { |
| 750 | .driver = { |
| 751 | .name = "mt9v032", |
| 752 | }, |
| 753 | .probe = mt9v032_probe, |
| 754 | .remove = mt9v032_remove, |
| 755 | .id_table = mt9v032_id, |
| 756 | }; |
| 757 | |
| 758 | static int __init mt9v032_init(void) |
| 759 | { |
| 760 | return i2c_add_driver(&mt9v032_driver); |
| 761 | } |
| 762 | |
| 763 | static void __exit mt9v032_exit(void) |
| 764 | { |
| 765 | i2c_del_driver(&mt9v032_driver); |
| 766 | } |
| 767 | |
| 768 | module_init(mt9v032_init); |
| 769 | module_exit(mt9v032_exit); |
| 770 | |
| 771 | MODULE_DESCRIPTION("Aptina MT9V032 Camera driver"); |
| 772 | MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>"); |
| 773 | MODULE_LICENSE("GPL"); |