| 1 | /* |
| 2 | * Driver for MT9M001 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/log2.h> |
| 15 | #include <linux/module.h> |
| 16 | |
| 17 | #include <media/soc_camera.h> |
| 18 | #include <media/soc_mediabus.h> |
| 19 | #include <media/v4l2-clk.h> |
| 20 | #include <media/v4l2-subdev.h> |
| 21 | #include <media/v4l2-ctrls.h> |
| 22 | |
| 23 | /* |
| 24 | * mt9m001 i2c address 0x5d |
| 25 | * The platform has to define struct i2c_board_info objects and link to them |
| 26 | * from struct soc_camera_host_desc |
| 27 | */ |
| 28 | |
| 29 | /* mt9m001 selected register addresses */ |
| 30 | #define MT9M001_CHIP_VERSION 0x00 |
| 31 | #define MT9M001_ROW_START 0x01 |
| 32 | #define MT9M001_COLUMN_START 0x02 |
| 33 | #define MT9M001_WINDOW_HEIGHT 0x03 |
| 34 | #define MT9M001_WINDOW_WIDTH 0x04 |
| 35 | #define MT9M001_HORIZONTAL_BLANKING 0x05 |
| 36 | #define MT9M001_VERTICAL_BLANKING 0x06 |
| 37 | #define MT9M001_OUTPUT_CONTROL 0x07 |
| 38 | #define MT9M001_SHUTTER_WIDTH 0x09 |
| 39 | #define MT9M001_FRAME_RESTART 0x0b |
| 40 | #define MT9M001_SHUTTER_DELAY 0x0c |
| 41 | #define MT9M001_RESET 0x0d |
| 42 | #define MT9M001_READ_OPTIONS1 0x1e |
| 43 | #define MT9M001_READ_OPTIONS2 0x20 |
| 44 | #define MT9M001_GLOBAL_GAIN 0x35 |
| 45 | #define MT9M001_CHIP_ENABLE 0xF1 |
| 46 | |
| 47 | #define MT9M001_MAX_WIDTH 1280 |
| 48 | #define MT9M001_MAX_HEIGHT 1024 |
| 49 | #define MT9M001_MIN_WIDTH 48 |
| 50 | #define MT9M001_MIN_HEIGHT 32 |
| 51 | #define MT9M001_COLUMN_SKIP 20 |
| 52 | #define MT9M001_ROW_SKIP 12 |
| 53 | |
| 54 | /* MT9M001 has only one fixed colorspace per pixelcode */ |
| 55 | struct mt9m001_datafmt { |
| 56 | u32 code; |
| 57 | enum v4l2_colorspace colorspace; |
| 58 | }; |
| 59 | |
| 60 | /* Find a data format by a pixel code in an array */ |
| 61 | static const struct mt9m001_datafmt *mt9m001_find_datafmt( |
| 62 | u32 code, const struct mt9m001_datafmt *fmt, |
| 63 | int n) |
| 64 | { |
| 65 | int i; |
| 66 | for (i = 0; i < n; i++) |
| 67 | if (fmt[i].code == code) |
| 68 | return fmt + i; |
| 69 | |
| 70 | return NULL; |
| 71 | } |
| 72 | |
| 73 | static const struct mt9m001_datafmt mt9m001_colour_fmts[] = { |
| 74 | /* |
| 75 | * Order important: first natively supported, |
| 76 | * second supported with a GPIO extender |
| 77 | */ |
| 78 | {MEDIA_BUS_FMT_SBGGR10_1X10, V4L2_COLORSPACE_SRGB}, |
| 79 | {MEDIA_BUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB}, |
| 80 | }; |
| 81 | |
| 82 | static const struct mt9m001_datafmt mt9m001_monochrome_fmts[] = { |
| 83 | /* Order important - see above */ |
| 84 | {MEDIA_BUS_FMT_Y10_1X10, V4L2_COLORSPACE_JPEG}, |
| 85 | {MEDIA_BUS_FMT_Y8_1X8, V4L2_COLORSPACE_JPEG}, |
| 86 | }; |
| 87 | |
| 88 | struct mt9m001 { |
| 89 | struct v4l2_subdev subdev; |
| 90 | struct v4l2_ctrl_handler hdl; |
| 91 | struct { |
| 92 | /* exposure/auto-exposure cluster */ |
| 93 | struct v4l2_ctrl *autoexposure; |
| 94 | struct v4l2_ctrl *exposure; |
| 95 | }; |
| 96 | struct v4l2_rect rect; /* Sensor window */ |
| 97 | struct v4l2_clk *clk; |
| 98 | const struct mt9m001_datafmt *fmt; |
| 99 | const struct mt9m001_datafmt *fmts; |
| 100 | int num_fmts; |
| 101 | unsigned int total_h; |
| 102 | unsigned short y_skip_top; /* Lines to skip at the top */ |
| 103 | }; |
| 104 | |
| 105 | static struct mt9m001 *to_mt9m001(const struct i2c_client *client) |
| 106 | { |
| 107 | return container_of(i2c_get_clientdata(client), struct mt9m001, subdev); |
| 108 | } |
| 109 | |
| 110 | static int reg_read(struct i2c_client *client, const u8 reg) |
| 111 | { |
| 112 | return i2c_smbus_read_word_swapped(client, reg); |
| 113 | } |
| 114 | |
| 115 | static int reg_write(struct i2c_client *client, const u8 reg, |
| 116 | const u16 data) |
| 117 | { |
| 118 | return i2c_smbus_write_word_swapped(client, reg, data); |
| 119 | } |
| 120 | |
| 121 | static int reg_set(struct i2c_client *client, const u8 reg, |
| 122 | const u16 data) |
| 123 | { |
| 124 | int ret; |
| 125 | |
| 126 | ret = reg_read(client, reg); |
| 127 | if (ret < 0) |
| 128 | return ret; |
| 129 | return reg_write(client, reg, ret | data); |
| 130 | } |
| 131 | |
| 132 | static int reg_clear(struct i2c_client *client, const u8 reg, |
| 133 | const u16 data) |
| 134 | { |
| 135 | int ret; |
| 136 | |
| 137 | ret = reg_read(client, reg); |
| 138 | if (ret < 0) |
| 139 | return ret; |
| 140 | return reg_write(client, reg, ret & ~data); |
| 141 | } |
| 142 | |
| 143 | static int mt9m001_init(struct i2c_client *client) |
| 144 | { |
| 145 | int ret; |
| 146 | |
| 147 | dev_dbg(&client->dev, "%s\n", __func__); |
| 148 | |
| 149 | /* |
| 150 | * We don't know, whether platform provides reset, issue a soft reset |
| 151 | * too. This returns all registers to their default values. |
| 152 | */ |
| 153 | ret = reg_write(client, MT9M001_RESET, 1); |
| 154 | if (!ret) |
| 155 | ret = reg_write(client, MT9M001_RESET, 0); |
| 156 | |
| 157 | /* Disable chip, synchronous option update */ |
| 158 | if (!ret) |
| 159 | ret = reg_write(client, MT9M001_OUTPUT_CONTROL, 0); |
| 160 | |
| 161 | return ret; |
| 162 | } |
| 163 | |
| 164 | static int mt9m001_s_stream(struct v4l2_subdev *sd, int enable) |
| 165 | { |
| 166 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
| 167 | |
| 168 | /* Switch to master "normal" mode or stop sensor readout */ |
| 169 | if (reg_write(client, MT9M001_OUTPUT_CONTROL, enable ? 2 : 0) < 0) |
| 170 | return -EIO; |
| 171 | return 0; |
| 172 | } |
| 173 | |
| 174 | static int mt9m001_s_crop(struct v4l2_subdev *sd, const struct v4l2_crop *a) |
| 175 | { |
| 176 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
| 177 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
| 178 | struct v4l2_rect rect = a->c; |
| 179 | int ret; |
| 180 | const u16 hblank = 9, vblank = 25; |
| 181 | |
| 182 | if (mt9m001->fmts == mt9m001_colour_fmts) |
| 183 | /* |
| 184 | * Bayer format - even number of rows for simplicity, |
| 185 | * but let the user play with the top row. |
| 186 | */ |
| 187 | rect.height = ALIGN(rect.height, 2); |
| 188 | |
| 189 | /* Datasheet requirement: see register description */ |
| 190 | rect.width = ALIGN(rect.width, 2); |
| 191 | rect.left = ALIGN(rect.left, 2); |
| 192 | |
| 193 | soc_camera_limit_side(&rect.left, &rect.width, |
| 194 | MT9M001_COLUMN_SKIP, MT9M001_MIN_WIDTH, MT9M001_MAX_WIDTH); |
| 195 | |
| 196 | soc_camera_limit_side(&rect.top, &rect.height, |
| 197 | MT9M001_ROW_SKIP, MT9M001_MIN_HEIGHT, MT9M001_MAX_HEIGHT); |
| 198 | |
| 199 | mt9m001->total_h = rect.height + mt9m001->y_skip_top + vblank; |
| 200 | |
| 201 | /* Blanking and start values - default... */ |
| 202 | ret = reg_write(client, MT9M001_HORIZONTAL_BLANKING, hblank); |
| 203 | if (!ret) |
| 204 | ret = reg_write(client, MT9M001_VERTICAL_BLANKING, vblank); |
| 205 | |
| 206 | /* |
| 207 | * The caller provides a supported format, as verified per |
| 208 | * call to .set_fmt(FORMAT_TRY). |
| 209 | */ |
| 210 | if (!ret) |
| 211 | ret = reg_write(client, MT9M001_COLUMN_START, rect.left); |
| 212 | if (!ret) |
| 213 | ret = reg_write(client, MT9M001_ROW_START, rect.top); |
| 214 | if (!ret) |
| 215 | ret = reg_write(client, MT9M001_WINDOW_WIDTH, rect.width - 1); |
| 216 | if (!ret) |
| 217 | ret = reg_write(client, MT9M001_WINDOW_HEIGHT, |
| 218 | rect.height + mt9m001->y_skip_top - 1); |
| 219 | if (!ret && v4l2_ctrl_g_ctrl(mt9m001->autoexposure) == V4L2_EXPOSURE_AUTO) |
| 220 | ret = reg_write(client, MT9M001_SHUTTER_WIDTH, mt9m001->total_h); |
| 221 | |
| 222 | if (!ret) |
| 223 | mt9m001->rect = rect; |
| 224 | |
| 225 | return ret; |
| 226 | } |
| 227 | |
| 228 | static int mt9m001_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) |
| 229 | { |
| 230 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
| 231 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
| 232 | |
| 233 | a->c = mt9m001->rect; |
| 234 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| 235 | |
| 236 | return 0; |
| 237 | } |
| 238 | |
| 239 | static int mt9m001_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a) |
| 240 | { |
| 241 | a->bounds.left = MT9M001_COLUMN_SKIP; |
| 242 | a->bounds.top = MT9M001_ROW_SKIP; |
| 243 | a->bounds.width = MT9M001_MAX_WIDTH; |
| 244 | a->bounds.height = MT9M001_MAX_HEIGHT; |
| 245 | a->defrect = a->bounds; |
| 246 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| 247 | a->pixelaspect.numerator = 1; |
| 248 | a->pixelaspect.denominator = 1; |
| 249 | |
| 250 | return 0; |
| 251 | } |
| 252 | |
| 253 | static int mt9m001_get_fmt(struct v4l2_subdev *sd, |
| 254 | struct v4l2_subdev_pad_config *cfg, |
| 255 | struct v4l2_subdev_format *format) |
| 256 | { |
| 257 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
| 258 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
| 259 | struct v4l2_mbus_framefmt *mf = &format->format; |
| 260 | |
| 261 | if (format->pad) |
| 262 | return -EINVAL; |
| 263 | |
| 264 | mf->width = mt9m001->rect.width; |
| 265 | mf->height = mt9m001->rect.height; |
| 266 | mf->code = mt9m001->fmt->code; |
| 267 | mf->colorspace = mt9m001->fmt->colorspace; |
| 268 | mf->field = V4L2_FIELD_NONE; |
| 269 | |
| 270 | return 0; |
| 271 | } |
| 272 | |
| 273 | static int mt9m001_s_fmt(struct v4l2_subdev *sd, |
| 274 | struct v4l2_mbus_framefmt *mf) |
| 275 | { |
| 276 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
| 277 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
| 278 | struct v4l2_crop a = { |
| 279 | .c = { |
| 280 | .left = mt9m001->rect.left, |
| 281 | .top = mt9m001->rect.top, |
| 282 | .width = mf->width, |
| 283 | .height = mf->height, |
| 284 | }, |
| 285 | }; |
| 286 | int ret; |
| 287 | |
| 288 | /* No support for scaling so far, just crop. TODO: use skipping */ |
| 289 | ret = mt9m001_s_crop(sd, &a); |
| 290 | if (!ret) { |
| 291 | mf->width = mt9m001->rect.width; |
| 292 | mf->height = mt9m001->rect.height; |
| 293 | mt9m001->fmt = mt9m001_find_datafmt(mf->code, |
| 294 | mt9m001->fmts, mt9m001->num_fmts); |
| 295 | mf->colorspace = mt9m001->fmt->colorspace; |
| 296 | } |
| 297 | |
| 298 | return ret; |
| 299 | } |
| 300 | |
| 301 | static int mt9m001_set_fmt(struct v4l2_subdev *sd, |
| 302 | struct v4l2_subdev_pad_config *cfg, |
| 303 | struct v4l2_subdev_format *format) |
| 304 | { |
| 305 | struct v4l2_mbus_framefmt *mf = &format->format; |
| 306 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
| 307 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
| 308 | const struct mt9m001_datafmt *fmt; |
| 309 | |
| 310 | if (format->pad) |
| 311 | return -EINVAL; |
| 312 | |
| 313 | v4l_bound_align_image(&mf->width, MT9M001_MIN_WIDTH, |
| 314 | MT9M001_MAX_WIDTH, 1, |
| 315 | &mf->height, MT9M001_MIN_HEIGHT + mt9m001->y_skip_top, |
| 316 | MT9M001_MAX_HEIGHT + mt9m001->y_skip_top, 0, 0); |
| 317 | |
| 318 | if (mt9m001->fmts == mt9m001_colour_fmts) |
| 319 | mf->height = ALIGN(mf->height - 1, 2); |
| 320 | |
| 321 | fmt = mt9m001_find_datafmt(mf->code, mt9m001->fmts, |
| 322 | mt9m001->num_fmts); |
| 323 | if (!fmt) { |
| 324 | fmt = mt9m001->fmt; |
| 325 | mf->code = fmt->code; |
| 326 | } |
| 327 | |
| 328 | mf->colorspace = fmt->colorspace; |
| 329 | |
| 330 | if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) |
| 331 | return mt9m001_s_fmt(sd, mf); |
| 332 | cfg->try_fmt = *mf; |
| 333 | return 0; |
| 334 | } |
| 335 | |
| 336 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
| 337 | static int mt9m001_g_register(struct v4l2_subdev *sd, |
| 338 | struct v4l2_dbg_register *reg) |
| 339 | { |
| 340 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
| 341 | |
| 342 | if (reg->reg > 0xff) |
| 343 | return -EINVAL; |
| 344 | |
| 345 | reg->size = 2; |
| 346 | reg->val = reg_read(client, reg->reg); |
| 347 | |
| 348 | if (reg->val > 0xffff) |
| 349 | return -EIO; |
| 350 | |
| 351 | return 0; |
| 352 | } |
| 353 | |
| 354 | static int mt9m001_s_register(struct v4l2_subdev *sd, |
| 355 | const struct v4l2_dbg_register *reg) |
| 356 | { |
| 357 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
| 358 | |
| 359 | if (reg->reg > 0xff) |
| 360 | return -EINVAL; |
| 361 | |
| 362 | if (reg_write(client, reg->reg, reg->val) < 0) |
| 363 | return -EIO; |
| 364 | |
| 365 | return 0; |
| 366 | } |
| 367 | #endif |
| 368 | |
| 369 | static int mt9m001_s_power(struct v4l2_subdev *sd, int on) |
| 370 | { |
| 371 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
| 372 | struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client); |
| 373 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
| 374 | |
| 375 | return soc_camera_set_power(&client->dev, ssdd, mt9m001->clk, on); |
| 376 | } |
| 377 | |
| 378 | static int mt9m001_g_volatile_ctrl(struct v4l2_ctrl *ctrl) |
| 379 | { |
| 380 | struct mt9m001 *mt9m001 = container_of(ctrl->handler, |
| 381 | struct mt9m001, hdl); |
| 382 | s32 min, max; |
| 383 | |
| 384 | switch (ctrl->id) { |
| 385 | case V4L2_CID_EXPOSURE_AUTO: |
| 386 | min = mt9m001->exposure->minimum; |
| 387 | max = mt9m001->exposure->maximum; |
| 388 | mt9m001->exposure->val = |
| 389 | (524 + (mt9m001->total_h - 1) * (max - min)) / 1048 + min; |
| 390 | break; |
| 391 | } |
| 392 | return 0; |
| 393 | } |
| 394 | |
| 395 | static int mt9m001_s_ctrl(struct v4l2_ctrl *ctrl) |
| 396 | { |
| 397 | struct mt9m001 *mt9m001 = container_of(ctrl->handler, |
| 398 | struct mt9m001, hdl); |
| 399 | struct v4l2_subdev *sd = &mt9m001->subdev; |
| 400 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
| 401 | struct v4l2_ctrl *exp = mt9m001->exposure; |
| 402 | int data; |
| 403 | |
| 404 | switch (ctrl->id) { |
| 405 | case V4L2_CID_VFLIP: |
| 406 | if (ctrl->val) |
| 407 | data = reg_set(client, MT9M001_READ_OPTIONS2, 0x8000); |
| 408 | else |
| 409 | data = reg_clear(client, MT9M001_READ_OPTIONS2, 0x8000); |
| 410 | if (data < 0) |
| 411 | return -EIO; |
| 412 | return 0; |
| 413 | |
| 414 | case V4L2_CID_GAIN: |
| 415 | /* See Datasheet Table 7, Gain settings. */ |
| 416 | if (ctrl->val <= ctrl->default_value) { |
| 417 | /* Pack it into 0..1 step 0.125, register values 0..8 */ |
| 418 | unsigned long range = ctrl->default_value - ctrl->minimum; |
| 419 | data = ((ctrl->val - (s32)ctrl->minimum) * 8 + range / 2) / range; |
| 420 | |
| 421 | dev_dbg(&client->dev, "Setting gain %d\n", data); |
| 422 | data = reg_write(client, MT9M001_GLOBAL_GAIN, data); |
| 423 | if (data < 0) |
| 424 | return -EIO; |
| 425 | } else { |
| 426 | /* Pack it into 1.125..15 variable step, register values 9..67 */ |
| 427 | /* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */ |
| 428 | unsigned long range = ctrl->maximum - ctrl->default_value - 1; |
| 429 | unsigned long gain = ((ctrl->val - (s32)ctrl->default_value - 1) * |
| 430 | 111 + range / 2) / range + 9; |
| 431 | |
| 432 | if (gain <= 32) |
| 433 | data = gain; |
| 434 | else if (gain <= 64) |
| 435 | data = ((gain - 32) * 16 + 16) / 32 + 80; |
| 436 | else |
| 437 | data = ((gain - 64) * 7 + 28) / 56 + 96; |
| 438 | |
| 439 | dev_dbg(&client->dev, "Setting gain from %d to %d\n", |
| 440 | reg_read(client, MT9M001_GLOBAL_GAIN), data); |
| 441 | data = reg_write(client, MT9M001_GLOBAL_GAIN, data); |
| 442 | if (data < 0) |
| 443 | return -EIO; |
| 444 | } |
| 445 | return 0; |
| 446 | |
| 447 | case V4L2_CID_EXPOSURE_AUTO: |
| 448 | if (ctrl->val == V4L2_EXPOSURE_MANUAL) { |
| 449 | unsigned long range = exp->maximum - exp->minimum; |
| 450 | unsigned long shutter = ((exp->val - (s32)exp->minimum) * 1048 + |
| 451 | range / 2) / range + 1; |
| 452 | |
| 453 | dev_dbg(&client->dev, |
| 454 | "Setting shutter width from %d to %lu\n", |
| 455 | reg_read(client, MT9M001_SHUTTER_WIDTH), shutter); |
| 456 | if (reg_write(client, MT9M001_SHUTTER_WIDTH, shutter) < 0) |
| 457 | return -EIO; |
| 458 | } else { |
| 459 | const u16 vblank = 25; |
| 460 | |
| 461 | mt9m001->total_h = mt9m001->rect.height + |
| 462 | mt9m001->y_skip_top + vblank; |
| 463 | if (reg_write(client, MT9M001_SHUTTER_WIDTH, mt9m001->total_h) < 0) |
| 464 | return -EIO; |
| 465 | } |
| 466 | return 0; |
| 467 | } |
| 468 | return -EINVAL; |
| 469 | } |
| 470 | |
| 471 | /* |
| 472 | * Interface active, can use i2c. If it fails, it can indeed mean, that |
| 473 | * this wasn't our capture interface, so, we wait for the right one |
| 474 | */ |
| 475 | static int mt9m001_video_probe(struct soc_camera_subdev_desc *ssdd, |
| 476 | struct i2c_client *client) |
| 477 | { |
| 478 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
| 479 | s32 data; |
| 480 | unsigned long flags; |
| 481 | int ret; |
| 482 | |
| 483 | ret = mt9m001_s_power(&mt9m001->subdev, 1); |
| 484 | if (ret < 0) |
| 485 | return ret; |
| 486 | |
| 487 | /* Enable the chip */ |
| 488 | data = reg_write(client, MT9M001_CHIP_ENABLE, 1); |
| 489 | dev_dbg(&client->dev, "write: %d\n", data); |
| 490 | |
| 491 | /* Read out the chip version register */ |
| 492 | data = reg_read(client, MT9M001_CHIP_VERSION); |
| 493 | |
| 494 | /* must be 0x8411 or 0x8421 for colour sensor and 8431 for bw */ |
| 495 | switch (data) { |
| 496 | case 0x8411: |
| 497 | case 0x8421: |
| 498 | mt9m001->fmts = mt9m001_colour_fmts; |
| 499 | break; |
| 500 | case 0x8431: |
| 501 | mt9m001->fmts = mt9m001_monochrome_fmts; |
| 502 | break; |
| 503 | default: |
| 504 | dev_err(&client->dev, |
| 505 | "No MT9M001 chip detected, register read %x\n", data); |
| 506 | ret = -ENODEV; |
| 507 | goto done; |
| 508 | } |
| 509 | |
| 510 | mt9m001->num_fmts = 0; |
| 511 | |
| 512 | /* |
| 513 | * This is a 10bit sensor, so by default we only allow 10bit. |
| 514 | * The platform may support different bus widths due to |
| 515 | * different routing of the data lines. |
| 516 | */ |
| 517 | if (ssdd->query_bus_param) |
| 518 | flags = ssdd->query_bus_param(ssdd); |
| 519 | else |
| 520 | flags = SOCAM_DATAWIDTH_10; |
| 521 | |
| 522 | if (flags & SOCAM_DATAWIDTH_10) |
| 523 | mt9m001->num_fmts++; |
| 524 | else |
| 525 | mt9m001->fmts++; |
| 526 | |
| 527 | if (flags & SOCAM_DATAWIDTH_8) |
| 528 | mt9m001->num_fmts++; |
| 529 | |
| 530 | mt9m001->fmt = &mt9m001->fmts[0]; |
| 531 | |
| 532 | dev_info(&client->dev, "Detected a MT9M001 chip ID %x (%s)\n", data, |
| 533 | data == 0x8431 ? "C12STM" : "C12ST"); |
| 534 | |
| 535 | ret = mt9m001_init(client); |
| 536 | if (ret < 0) { |
| 537 | dev_err(&client->dev, "Failed to initialise the camera\n"); |
| 538 | goto done; |
| 539 | } |
| 540 | |
| 541 | /* mt9m001_init() has reset the chip, returning registers to defaults */ |
| 542 | ret = v4l2_ctrl_handler_setup(&mt9m001->hdl); |
| 543 | |
| 544 | done: |
| 545 | mt9m001_s_power(&mt9m001->subdev, 0); |
| 546 | return ret; |
| 547 | } |
| 548 | |
| 549 | static void mt9m001_video_remove(struct soc_camera_subdev_desc *ssdd) |
| 550 | { |
| 551 | if (ssdd->free_bus) |
| 552 | ssdd->free_bus(ssdd); |
| 553 | } |
| 554 | |
| 555 | static int mt9m001_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines) |
| 556 | { |
| 557 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
| 558 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
| 559 | |
| 560 | *lines = mt9m001->y_skip_top; |
| 561 | |
| 562 | return 0; |
| 563 | } |
| 564 | |
| 565 | static const struct v4l2_ctrl_ops mt9m001_ctrl_ops = { |
| 566 | .g_volatile_ctrl = mt9m001_g_volatile_ctrl, |
| 567 | .s_ctrl = mt9m001_s_ctrl, |
| 568 | }; |
| 569 | |
| 570 | static struct v4l2_subdev_core_ops mt9m001_subdev_core_ops = { |
| 571 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
| 572 | .g_register = mt9m001_g_register, |
| 573 | .s_register = mt9m001_s_register, |
| 574 | #endif |
| 575 | .s_power = mt9m001_s_power, |
| 576 | }; |
| 577 | |
| 578 | static int mt9m001_enum_mbus_code(struct v4l2_subdev *sd, |
| 579 | struct v4l2_subdev_pad_config *cfg, |
| 580 | struct v4l2_subdev_mbus_code_enum *code) |
| 581 | { |
| 582 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
| 583 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
| 584 | |
| 585 | if (code->pad || code->index >= mt9m001->num_fmts) |
| 586 | return -EINVAL; |
| 587 | |
| 588 | code->code = mt9m001->fmts[code->index].code; |
| 589 | return 0; |
| 590 | } |
| 591 | |
| 592 | static int mt9m001_g_mbus_config(struct v4l2_subdev *sd, |
| 593 | struct v4l2_mbus_config *cfg) |
| 594 | { |
| 595 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
| 596 | struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client); |
| 597 | |
| 598 | /* MT9M001 has all capture_format parameters fixed */ |
| 599 | cfg->flags = V4L2_MBUS_PCLK_SAMPLE_FALLING | |
| 600 | V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_HIGH | |
| 601 | V4L2_MBUS_DATA_ACTIVE_HIGH | V4L2_MBUS_MASTER; |
| 602 | cfg->type = V4L2_MBUS_PARALLEL; |
| 603 | cfg->flags = soc_camera_apply_board_flags(ssdd, cfg); |
| 604 | |
| 605 | return 0; |
| 606 | } |
| 607 | |
| 608 | static int mt9m001_s_mbus_config(struct v4l2_subdev *sd, |
| 609 | const struct v4l2_mbus_config *cfg) |
| 610 | { |
| 611 | const struct i2c_client *client = v4l2_get_subdevdata(sd); |
| 612 | struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client); |
| 613 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
| 614 | unsigned int bps = soc_mbus_get_fmtdesc(mt9m001->fmt->code)->bits_per_sample; |
| 615 | |
| 616 | if (ssdd->set_bus_param) |
| 617 | return ssdd->set_bus_param(ssdd, 1 << (bps - 1)); |
| 618 | |
| 619 | /* |
| 620 | * Without board specific bus width settings we only support the |
| 621 | * sensors native bus width |
| 622 | */ |
| 623 | return bps == 10 ? 0 : -EINVAL; |
| 624 | } |
| 625 | |
| 626 | static struct v4l2_subdev_video_ops mt9m001_subdev_video_ops = { |
| 627 | .s_stream = mt9m001_s_stream, |
| 628 | .s_crop = mt9m001_s_crop, |
| 629 | .g_crop = mt9m001_g_crop, |
| 630 | .cropcap = mt9m001_cropcap, |
| 631 | .g_mbus_config = mt9m001_g_mbus_config, |
| 632 | .s_mbus_config = mt9m001_s_mbus_config, |
| 633 | }; |
| 634 | |
| 635 | static struct v4l2_subdev_sensor_ops mt9m001_subdev_sensor_ops = { |
| 636 | .g_skip_top_lines = mt9m001_g_skip_top_lines, |
| 637 | }; |
| 638 | |
| 639 | static const struct v4l2_subdev_pad_ops mt9m001_subdev_pad_ops = { |
| 640 | .enum_mbus_code = mt9m001_enum_mbus_code, |
| 641 | .get_fmt = mt9m001_get_fmt, |
| 642 | .set_fmt = mt9m001_set_fmt, |
| 643 | }; |
| 644 | |
| 645 | static struct v4l2_subdev_ops mt9m001_subdev_ops = { |
| 646 | .core = &mt9m001_subdev_core_ops, |
| 647 | .video = &mt9m001_subdev_video_ops, |
| 648 | .sensor = &mt9m001_subdev_sensor_ops, |
| 649 | .pad = &mt9m001_subdev_pad_ops, |
| 650 | }; |
| 651 | |
| 652 | static int mt9m001_probe(struct i2c_client *client, |
| 653 | const struct i2c_device_id *did) |
| 654 | { |
| 655 | struct mt9m001 *mt9m001; |
| 656 | struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); |
| 657 | struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client); |
| 658 | int ret; |
| 659 | |
| 660 | if (!ssdd) { |
| 661 | dev_err(&client->dev, "MT9M001 driver needs platform data\n"); |
| 662 | return -EINVAL; |
| 663 | } |
| 664 | |
| 665 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) { |
| 666 | dev_warn(&adapter->dev, |
| 667 | "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n"); |
| 668 | return -EIO; |
| 669 | } |
| 670 | |
| 671 | mt9m001 = devm_kzalloc(&client->dev, sizeof(struct mt9m001), GFP_KERNEL); |
| 672 | if (!mt9m001) |
| 673 | return -ENOMEM; |
| 674 | |
| 675 | v4l2_i2c_subdev_init(&mt9m001->subdev, client, &mt9m001_subdev_ops); |
| 676 | v4l2_ctrl_handler_init(&mt9m001->hdl, 4); |
| 677 | v4l2_ctrl_new_std(&mt9m001->hdl, &mt9m001_ctrl_ops, |
| 678 | V4L2_CID_VFLIP, 0, 1, 1, 0); |
| 679 | v4l2_ctrl_new_std(&mt9m001->hdl, &mt9m001_ctrl_ops, |
| 680 | V4L2_CID_GAIN, 0, 127, 1, 64); |
| 681 | mt9m001->exposure = v4l2_ctrl_new_std(&mt9m001->hdl, &mt9m001_ctrl_ops, |
| 682 | V4L2_CID_EXPOSURE, 1, 255, 1, 255); |
| 683 | /* |
| 684 | * Simulated autoexposure. If enabled, we calculate shutter width |
| 685 | * ourselves in the driver based on vertical blanking and frame width |
| 686 | */ |
| 687 | mt9m001->autoexposure = v4l2_ctrl_new_std_menu(&mt9m001->hdl, |
| 688 | &mt9m001_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1, 0, |
| 689 | V4L2_EXPOSURE_AUTO); |
| 690 | mt9m001->subdev.ctrl_handler = &mt9m001->hdl; |
| 691 | if (mt9m001->hdl.error) |
| 692 | return mt9m001->hdl.error; |
| 693 | |
| 694 | v4l2_ctrl_auto_cluster(2, &mt9m001->autoexposure, |
| 695 | V4L2_EXPOSURE_MANUAL, true); |
| 696 | |
| 697 | /* Second stage probe - when a capture adapter is there */ |
| 698 | mt9m001->y_skip_top = 0; |
| 699 | mt9m001->rect.left = MT9M001_COLUMN_SKIP; |
| 700 | mt9m001->rect.top = MT9M001_ROW_SKIP; |
| 701 | mt9m001->rect.width = MT9M001_MAX_WIDTH; |
| 702 | mt9m001->rect.height = MT9M001_MAX_HEIGHT; |
| 703 | |
| 704 | mt9m001->clk = v4l2_clk_get(&client->dev, "mclk"); |
| 705 | if (IS_ERR(mt9m001->clk)) { |
| 706 | ret = PTR_ERR(mt9m001->clk); |
| 707 | goto eclkget; |
| 708 | } |
| 709 | |
| 710 | ret = mt9m001_video_probe(ssdd, client); |
| 711 | if (ret) { |
| 712 | v4l2_clk_put(mt9m001->clk); |
| 713 | eclkget: |
| 714 | v4l2_ctrl_handler_free(&mt9m001->hdl); |
| 715 | } |
| 716 | |
| 717 | return ret; |
| 718 | } |
| 719 | |
| 720 | static int mt9m001_remove(struct i2c_client *client) |
| 721 | { |
| 722 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
| 723 | struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client); |
| 724 | |
| 725 | v4l2_clk_put(mt9m001->clk); |
| 726 | v4l2_device_unregister_subdev(&mt9m001->subdev); |
| 727 | v4l2_ctrl_handler_free(&mt9m001->hdl); |
| 728 | mt9m001_video_remove(ssdd); |
| 729 | |
| 730 | return 0; |
| 731 | } |
| 732 | |
| 733 | static const struct i2c_device_id mt9m001_id[] = { |
| 734 | { "mt9m001", 0 }, |
| 735 | { } |
| 736 | }; |
| 737 | MODULE_DEVICE_TABLE(i2c, mt9m001_id); |
| 738 | |
| 739 | static struct i2c_driver mt9m001_i2c_driver = { |
| 740 | .driver = { |
| 741 | .name = "mt9m001", |
| 742 | }, |
| 743 | .probe = mt9m001_probe, |
| 744 | .remove = mt9m001_remove, |
| 745 | .id_table = mt9m001_id, |
| 746 | }; |
| 747 | |
| 748 | module_i2c_driver(mt9m001_i2c_driver); |
| 749 | |
| 750 | MODULE_DESCRIPTION("Micron MT9M001 Camera driver"); |
| 751 | MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>"); |
| 752 | MODULE_LICENSE("GPL"); |