Commit | Line | Data |
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4e96fd08 GL |
1 | /* |
2 | * Driver for MT9T031 CMOS Image Sensor from Micron | |
3 | * | |
4 | * Copyright (C) 2008, Guennadi Liakhovetski, DENX Software Engineering <lg@denx.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 | ||
535653b1 | 11 | #include <linux/device.h> |
4e96fd08 GL |
12 | #include <linux/i2c.h> |
13 | #include <linux/log2.h> | |
535653b1 VL |
14 | #include <linux/pm.h> |
15 | #include <linux/slab.h> | |
16 | #include <linux/videodev2.h> | |
4e96fd08 | 17 | |
4e96fd08 | 18 | #include <media/soc_camera.h> |
a3505755 | 19 | #include <media/soc_mediabus.h> |
535653b1 VL |
20 | #include <media/v4l2-chip-ident.h> |
21 | #include <media/v4l2-subdev.h> | |
4e96fd08 | 22 | |
5d28d525 GL |
23 | /* |
24 | * mt9t031 i2c address 0x5d | |
979ea1dd | 25 | * The platform has to define i2c_board_info and link to it from |
5d28d525 GL |
26 | * struct soc_camera_link |
27 | */ | |
4e96fd08 GL |
28 | |
29 | /* mt9t031 selected register addresses */ | |
30 | #define MT9T031_CHIP_VERSION 0x00 | |
31 | #define MT9T031_ROW_START 0x01 | |
32 | #define MT9T031_COLUMN_START 0x02 | |
33 | #define MT9T031_WINDOW_HEIGHT 0x03 | |
34 | #define MT9T031_WINDOW_WIDTH 0x04 | |
35 | #define MT9T031_HORIZONTAL_BLANKING 0x05 | |
36 | #define MT9T031_VERTICAL_BLANKING 0x06 | |
37 | #define MT9T031_OUTPUT_CONTROL 0x07 | |
38 | #define MT9T031_SHUTTER_WIDTH_UPPER 0x08 | |
39 | #define MT9T031_SHUTTER_WIDTH 0x09 | |
40 | #define MT9T031_PIXEL_CLOCK_CONTROL 0x0a | |
41 | #define MT9T031_FRAME_RESTART 0x0b | |
42 | #define MT9T031_SHUTTER_DELAY 0x0c | |
43 | #define MT9T031_RESET 0x0d | |
44 | #define MT9T031_READ_MODE_1 0x1e | |
45 | #define MT9T031_READ_MODE_2 0x20 | |
46 | #define MT9T031_READ_MODE_3 0x21 | |
47 | #define MT9T031_ROW_ADDRESS_MODE 0x22 | |
48 | #define MT9T031_COLUMN_ADDRESS_MODE 0x23 | |
49 | #define MT9T031_GLOBAL_GAIN 0x35 | |
50 | #define MT9T031_CHIP_ENABLE 0xF8 | |
51 | ||
52 | #define MT9T031_MAX_HEIGHT 1536 | |
53 | #define MT9T031_MAX_WIDTH 2048 | |
54 | #define MT9T031_MIN_HEIGHT 2 | |
6a6c8786 | 55 | #define MT9T031_MIN_WIDTH 18 |
4e96fd08 GL |
56 | #define MT9T031_HORIZONTAL_BLANK 142 |
57 | #define MT9T031_VERTICAL_BLANK 25 | |
58 | #define MT9T031_COLUMN_SKIP 32 | |
59 | #define MT9T031_ROW_SKIP 20 | |
60 | ||
4e96fd08 | 61 | struct mt9t031 { |
979ea1dd | 62 | struct v4l2_subdev subdev; |
6a6c8786 | 63 | struct v4l2_rect rect; /* Sensor window */ |
4e96fd08 | 64 | int model; /* V4L2_IDENT_MT9T031* codes from v4l2-chip-ident.h */ |
4e96fd08 GL |
65 | u16 xskip; |
66 | u16 yskip; | |
96c75399 | 67 | unsigned int gain; |
32536108 | 68 | unsigned short y_skip_top; /* Lines to skip at the top */ |
96c75399 | 69 | unsigned int exposure; |
6a6c8786 | 70 | unsigned char autoexposure; |
4e96fd08 GL |
71 | }; |
72 | ||
979ea1dd GL |
73 | static struct mt9t031 *to_mt9t031(const struct i2c_client *client) |
74 | { | |
75 | return container_of(i2c_get_clientdata(client), struct mt9t031, subdev); | |
76 | } | |
77 | ||
9538e1c2 | 78 | static int reg_read(struct i2c_client *client, const u8 reg) |
4e96fd08 | 79 | { |
4e96fd08 GL |
80 | s32 data = i2c_smbus_read_word_data(client, reg); |
81 | return data < 0 ? data : swab16(data); | |
82 | } | |
83 | ||
9538e1c2 | 84 | static int reg_write(struct i2c_client *client, const u8 reg, |
4e96fd08 GL |
85 | const u16 data) |
86 | { | |
9538e1c2 | 87 | return i2c_smbus_write_word_data(client, reg, swab16(data)); |
4e96fd08 GL |
88 | } |
89 | ||
9538e1c2 | 90 | static int reg_set(struct i2c_client *client, const u8 reg, |
4e96fd08 GL |
91 | const u16 data) |
92 | { | |
93 | int ret; | |
94 | ||
9538e1c2 | 95 | ret = reg_read(client, reg); |
4e96fd08 GL |
96 | if (ret < 0) |
97 | return ret; | |
9538e1c2 | 98 | return reg_write(client, reg, ret | data); |
4e96fd08 GL |
99 | } |
100 | ||
9538e1c2 | 101 | static int reg_clear(struct i2c_client *client, const u8 reg, |
4e96fd08 GL |
102 | const u16 data) |
103 | { | |
104 | int ret; | |
105 | ||
9538e1c2 | 106 | ret = reg_read(client, reg); |
4e96fd08 GL |
107 | if (ret < 0) |
108 | return ret; | |
9538e1c2 | 109 | return reg_write(client, reg, ret & ~data); |
4e96fd08 GL |
110 | } |
111 | ||
9538e1c2 | 112 | static int set_shutter(struct i2c_client *client, const u32 data) |
4e96fd08 GL |
113 | { |
114 | int ret; | |
115 | ||
9538e1c2 | 116 | ret = reg_write(client, MT9T031_SHUTTER_WIDTH_UPPER, data >> 16); |
4e96fd08 GL |
117 | |
118 | if (ret >= 0) | |
9538e1c2 | 119 | ret = reg_write(client, MT9T031_SHUTTER_WIDTH, data & 0xffff); |
4e96fd08 GL |
120 | |
121 | return ret; | |
122 | } | |
123 | ||
9538e1c2 | 124 | static int get_shutter(struct i2c_client *client, u32 *data) |
4e96fd08 GL |
125 | { |
126 | int ret; | |
127 | ||
9538e1c2 | 128 | ret = reg_read(client, MT9T031_SHUTTER_WIDTH_UPPER); |
4e96fd08 GL |
129 | *data = ret << 16; |
130 | ||
131 | if (ret >= 0) | |
9538e1c2 | 132 | ret = reg_read(client, MT9T031_SHUTTER_WIDTH); |
4e96fd08 GL |
133 | *data |= ret & 0xffff; |
134 | ||
135 | return ret < 0 ? ret : 0; | |
136 | } | |
137 | ||
979ea1dd | 138 | static int mt9t031_idle(struct i2c_client *client) |
4e96fd08 GL |
139 | { |
140 | int ret; | |
141 | ||
142 | /* Disable chip output, synchronous option update */ | |
9538e1c2 | 143 | ret = reg_write(client, MT9T031_RESET, 1); |
4e96fd08 | 144 | if (ret >= 0) |
9538e1c2 | 145 | ret = reg_write(client, MT9T031_RESET, 0); |
4e96fd08 | 146 | if (ret >= 0) |
9538e1c2 | 147 | ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 2); |
4e96fd08 GL |
148 | |
149 | return ret >= 0 ? 0 : -EIO; | |
150 | } | |
151 | ||
979ea1dd | 152 | static int mt9t031_disable(struct i2c_client *client) |
4e96fd08 GL |
153 | { |
154 | /* Disable the chip */ | |
9538e1c2 | 155 | reg_clear(client, MT9T031_OUTPUT_CONTROL, 2); |
f9826514 | 156 | |
4e96fd08 GL |
157 | return 0; |
158 | } | |
159 | ||
979ea1dd GL |
160 | static int mt9t031_s_stream(struct v4l2_subdev *sd, int enable) |
161 | { | |
c4ce6d14 | 162 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
979ea1dd GL |
163 | int ret; |
164 | ||
165 | if (enable) | |
166 | /* Switch to master "normal" mode */ | |
167 | ret = reg_set(client, MT9T031_OUTPUT_CONTROL, 2); | |
168 | else | |
169 | /* Stop sensor readout */ | |
170 | ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 2); | |
171 | ||
172 | if (ret < 0) | |
4e96fd08 | 173 | return -EIO; |
979ea1dd | 174 | |
4e96fd08 GL |
175 | return 0; |
176 | } | |
177 | ||
a3a4ac14 GL |
178 | enum { |
179 | MT9T031_CTRL_VFLIP, | |
180 | MT9T031_CTRL_HFLIP, | |
181 | MT9T031_CTRL_GAIN, | |
182 | MT9T031_CTRL_EXPOSURE, | |
183 | MT9T031_CTRL_EXPOSURE_AUTO, | |
184 | }; | |
185 | ||
186 | static const struct v4l2_queryctrl mt9t031_controls[] = { | |
187 | [MT9T031_CTRL_VFLIP] = { | |
188 | .id = V4L2_CID_VFLIP, | |
189 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
190 | .name = "Flip Vertically", | |
191 | .minimum = 0, | |
192 | .maximum = 1, | |
193 | .step = 1, | |
194 | .default_value = 0, | |
195 | }, | |
196 | [MT9T031_CTRL_HFLIP] = { | |
197 | .id = V4L2_CID_HFLIP, | |
198 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
199 | .name = "Flip Horizontally", | |
200 | .minimum = 0, | |
201 | .maximum = 1, | |
202 | .step = 1, | |
203 | .default_value = 0, | |
204 | }, | |
205 | [MT9T031_CTRL_GAIN] = { | |
206 | .id = V4L2_CID_GAIN, | |
207 | .type = V4L2_CTRL_TYPE_INTEGER, | |
208 | .name = "Gain", | |
209 | .minimum = 0, | |
210 | .maximum = 127, | |
211 | .step = 1, | |
212 | .default_value = 64, | |
213 | .flags = V4L2_CTRL_FLAG_SLIDER, | |
214 | }, | |
215 | [MT9T031_CTRL_EXPOSURE] = { | |
216 | .id = V4L2_CID_EXPOSURE, | |
217 | .type = V4L2_CTRL_TYPE_INTEGER, | |
218 | .name = "Exposure", | |
219 | .minimum = 1, | |
220 | .maximum = 255, | |
221 | .step = 1, | |
222 | .default_value = 255, | |
223 | .flags = V4L2_CTRL_FLAG_SLIDER, | |
224 | }, | |
225 | [MT9T031_CTRL_EXPOSURE_AUTO] = { | |
226 | .id = V4L2_CID_EXPOSURE_AUTO, | |
227 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
228 | .name = "Automatic Exposure", | |
229 | .minimum = 0, | |
230 | .maximum = 1, | |
231 | .step = 1, | |
232 | .default_value = 1, | |
233 | } | |
234 | }; | |
235 | ||
236 | static struct soc_camera_ops mt9t031_ops = { | |
a3a4ac14 GL |
237 | .controls = mt9t031_controls, |
238 | .num_controls = ARRAY_SIZE(mt9t031_controls), | |
239 | }; | |
240 | ||
6a6c8786 GL |
241 | /* target must be _even_ */ |
242 | static u16 mt9t031_skip(s32 *source, s32 target, s32 max) | |
70e1d353 | 243 | { |
6a6c8786 GL |
244 | unsigned int skip; |
245 | ||
246 | if (*source < target + target / 2) { | |
247 | *source = target; | |
248 | return 1; | |
249 | } | |
250 | ||
251 | skip = min(max, *source + target / 2) / target; | |
252 | if (skip > 8) | |
253 | skip = 8; | |
254 | *source = target * skip; | |
255 | ||
256 | return skip; | |
70e1d353 GL |
257 | } |
258 | ||
6a6c8786 | 259 | /* rect is the sensor rectangle, the caller guarantees parameter validity */ |
a3a4ac14 | 260 | static int mt9t031_set_params(struct i2c_client *client, |
09e231b3 | 261 | struct v4l2_rect *rect, u16 xskip, u16 yskip) |
4e96fd08 | 262 | { |
979ea1dd | 263 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
4e96fd08 | 264 | int ret; |
6a6c8786 | 265 | u16 xbin, ybin; |
4e96fd08 GL |
266 | const u16 hblank = MT9T031_HORIZONTAL_BLANK, |
267 | vblank = MT9T031_VERTICAL_BLANK; | |
4e96fd08 GL |
268 | |
269 | xbin = min(xskip, (u16)3); | |
270 | ybin = min(yskip, (u16)3); | |
271 | ||
6a6c8786 GL |
272 | /* |
273 | * Could just do roundup(rect->left, [xy]bin * 2); but this is cheaper. | |
274 | * There is always a valid suitably aligned value. The worst case is | |
275 | * xbin = 3, width = 2048. Then we will start at 36, the last read out | |
276 | * pixel will be 2083, which is < 2085 - first black pixel. | |
277 | * | |
278 | * MT9T031 datasheet imposes window left border alignment, depending on | |
279 | * the selected xskip. Failing to conform to this requirement produces | |
280 | * dark horizontal stripes in the image. However, even obeying to this | |
281 | * requirement doesn't eliminate the stripes in all configurations. They | |
282 | * appear "locally reproducibly," but can differ between tests under | |
283 | * different lighting conditions. | |
284 | */ | |
4e96fd08 | 285 | switch (xbin) { |
6a6c8786 GL |
286 | case 1: |
287 | rect->left &= ~1; | |
4e96fd08 | 288 | break; |
4e96fd08 | 289 | case 2: |
6a6c8786 | 290 | rect->left &= ~3; |
4e96fd08 GL |
291 | break; |
292 | case 3: | |
6a6c8786 GL |
293 | rect->left = rect->left > roundup(MT9T031_COLUMN_SKIP, 6) ? |
294 | (rect->left / 6) * 6 : roundup(MT9T031_COLUMN_SKIP, 6); | |
4e96fd08 GL |
295 | } |
296 | ||
6a6c8786 GL |
297 | rect->top &= ~1; |
298 | ||
299 | dev_dbg(&client->dev, "skip %u:%u, rect %ux%u@%u:%u\n", | |
300 | xskip, yskip, rect->width, rect->height, rect->left, rect->top); | |
301 | ||
70e1d353 | 302 | /* Disable register update, reconfigure atomically */ |
9538e1c2 | 303 | ret = reg_set(client, MT9T031_OUTPUT_CONTROL, 1); |
70e1d353 GL |
304 | if (ret < 0) |
305 | return ret; | |
306 | ||
4e96fd08 | 307 | /* Blanking and start values - default... */ |
9538e1c2 | 308 | ret = reg_write(client, MT9T031_HORIZONTAL_BLANKING, hblank); |
4e96fd08 | 309 | if (ret >= 0) |
9538e1c2 | 310 | ret = reg_write(client, MT9T031_VERTICAL_BLANKING, vblank); |
4e96fd08 | 311 | |
09e231b3 | 312 | if (yskip != mt9t031->yskip || xskip != mt9t031->xskip) { |
4e96fd08 GL |
313 | /* Binning, skipping */ |
314 | if (ret >= 0) | |
9538e1c2 | 315 | ret = reg_write(client, MT9T031_COLUMN_ADDRESS_MODE, |
4e96fd08 GL |
316 | ((xbin - 1) << 4) | (xskip - 1)); |
317 | if (ret >= 0) | |
9538e1c2 | 318 | ret = reg_write(client, MT9T031_ROW_ADDRESS_MODE, |
4e96fd08 GL |
319 | ((ybin - 1) << 4) | (yskip - 1)); |
320 | } | |
6a6c8786 GL |
321 | dev_dbg(&client->dev, "new physical left %u, top %u\n", |
322 | rect->left, rect->top); | |
4e96fd08 | 323 | |
5d28d525 GL |
324 | /* |
325 | * The caller provides a supported format, as guaranteed by | |
326 | * icd->try_fmt_cap(), soc_camera_s_crop() and soc_camera_cropcap() | |
327 | */ | |
4e96fd08 | 328 | if (ret >= 0) |
6a6c8786 | 329 | ret = reg_write(client, MT9T031_COLUMN_START, rect->left); |
4e96fd08 | 330 | if (ret >= 0) |
6a6c8786 | 331 | ret = reg_write(client, MT9T031_ROW_START, rect->top); |
4e96fd08 | 332 | if (ret >= 0) |
6a6c8786 | 333 | ret = reg_write(client, MT9T031_WINDOW_WIDTH, rect->width - 1); |
4e96fd08 | 334 | if (ret >= 0) |
9538e1c2 | 335 | ret = reg_write(client, MT9T031_WINDOW_HEIGHT, |
32536108 | 336 | rect->height + mt9t031->y_skip_top - 1); |
4e96fd08 | 337 | if (ret >= 0 && mt9t031->autoexposure) { |
32536108 | 338 | unsigned int total_h = rect->height + mt9t031->y_skip_top + vblank; |
96c75399 | 339 | ret = set_shutter(client, total_h); |
4e96fd08 GL |
340 | if (ret >= 0) { |
341 | const u32 shutter_max = MT9T031_MAX_HEIGHT + vblank; | |
342 | const struct v4l2_queryctrl *qctrl = | |
a3a4ac14 | 343 | &mt9t031_controls[MT9T031_CTRL_EXPOSURE]; |
96c75399 GL |
344 | mt9t031->exposure = (shutter_max / 2 + (total_h - 1) * |
345 | (qctrl->maximum - qctrl->minimum)) / | |
4e96fd08 GL |
346 | shutter_max + qctrl->minimum; |
347 | } | |
348 | } | |
349 | ||
09e231b3 GL |
350 | /* Re-enable register update, commit all changes */ |
351 | if (ret >= 0) | |
9538e1c2 | 352 | ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 1); |
09e231b3 | 353 | |
6a6c8786 GL |
354 | if (ret >= 0) { |
355 | mt9t031->rect = *rect; | |
356 | mt9t031->xskip = xskip; | |
357 | mt9t031->yskip = yskip; | |
358 | } | |
359 | ||
09e231b3 GL |
360 | return ret < 0 ? ret : 0; |
361 | } | |
362 | ||
08590b96 | 363 | static int mt9t031_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) |
09e231b3 | 364 | { |
6a6c8786 | 365 | struct v4l2_rect rect = a->c; |
c4ce6d14 | 366 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
979ea1dd | 367 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
09e231b3 | 368 | |
6a6c8786 GL |
369 | rect.width = ALIGN(rect.width, 2); |
370 | rect.height = ALIGN(rect.height, 2); | |
371 | ||
372 | soc_camera_limit_side(&rect.left, &rect.width, | |
373 | MT9T031_COLUMN_SKIP, MT9T031_MIN_WIDTH, MT9T031_MAX_WIDTH); | |
374 | ||
375 | soc_camera_limit_side(&rect.top, &rect.height, | |
376 | MT9T031_ROW_SKIP, MT9T031_MIN_HEIGHT, MT9T031_MAX_HEIGHT); | |
377 | ||
a3a4ac14 | 378 | return mt9t031_set_params(client, &rect, mt9t031->xskip, mt9t031->yskip); |
6a6c8786 GL |
379 | } |
380 | ||
381 | static int mt9t031_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) | |
382 | { | |
c4ce6d14 | 383 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
6a6c8786 GL |
384 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
385 | ||
386 | a->c = mt9t031->rect; | |
387 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
e330919a | 388 | |
6a6c8786 GL |
389 | return 0; |
390 | } | |
391 | ||
392 | static int mt9t031_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a) | |
393 | { | |
394 | a->bounds.left = MT9T031_COLUMN_SKIP; | |
395 | a->bounds.top = MT9T031_ROW_SKIP; | |
396 | a->bounds.width = MT9T031_MAX_WIDTH; | |
397 | a->bounds.height = MT9T031_MAX_HEIGHT; | |
398 | a->defrect = a->bounds; | |
399 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
400 | a->pixelaspect.numerator = 1; | |
401 | a->pixelaspect.denominator = 1; | |
e330919a | 402 | |
6a6c8786 GL |
403 | return 0; |
404 | } | |
405 | ||
760697be GL |
406 | static int mt9t031_g_fmt(struct v4l2_subdev *sd, |
407 | struct v4l2_mbus_framefmt *mf) | |
6a6c8786 | 408 | { |
c4ce6d14 | 409 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
6a6c8786 | 410 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
6a6c8786 | 411 | |
760697be GL |
412 | mf->width = mt9t031->rect.width / mt9t031->xskip; |
413 | mf->height = mt9t031->rect.height / mt9t031->yskip; | |
414 | mf->code = V4L2_MBUS_FMT_SBGGR10_1X10; | |
415 | mf->colorspace = V4L2_COLORSPACE_SRGB; | |
416 | mf->field = V4L2_FIELD_NONE; | |
6a6c8786 GL |
417 | |
418 | return 0; | |
09e231b3 GL |
419 | } |
420 | ||
760697be GL |
421 | static int mt9t031_s_fmt(struct v4l2_subdev *sd, |
422 | struct v4l2_mbus_framefmt *mf) | |
09e231b3 | 423 | { |
c4ce6d14 | 424 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
979ea1dd | 425 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
09e231b3 | 426 | u16 xskip, yskip; |
6a6c8786 | 427 | struct v4l2_rect rect = mt9t031->rect; |
09e231b3 GL |
428 | |
429 | /* | |
6a6c8786 GL |
430 | * try_fmt has put width and height within limits. |
431 | * S_FMT: use binning and skipping for scaling | |
09e231b3 | 432 | */ |
760697be GL |
433 | xskip = mt9t031_skip(&rect.width, mf->width, MT9T031_MAX_WIDTH); |
434 | yskip = mt9t031_skip(&rect.height, mf->height, MT9T031_MAX_HEIGHT); | |
435 | ||
436 | mf->code = V4L2_MBUS_FMT_SBGGR10_1X10; | |
437 | mf->colorspace = V4L2_COLORSPACE_SRGB; | |
4e96fd08 | 438 | |
6a6c8786 | 439 | /* mt9t031_set_params() doesn't change width and height */ |
a3a4ac14 | 440 | return mt9t031_set_params(client, &rect, xskip, yskip); |
4e96fd08 GL |
441 | } |
442 | ||
6a6c8786 GL |
443 | /* |
444 | * If a user window larger than sensor window is requested, we'll increase the | |
445 | * sensor window. | |
446 | */ | |
760697be GL |
447 | static int mt9t031_try_fmt(struct v4l2_subdev *sd, |
448 | struct v4l2_mbus_framefmt *mf) | |
4e96fd08 | 449 | { |
653dc59b | 450 | v4l_bound_align_image( |
760697be GL |
451 | &mf->width, MT9T031_MIN_WIDTH, MT9T031_MAX_WIDTH, 1, |
452 | &mf->height, MT9T031_MIN_HEIGHT, MT9T031_MAX_HEIGHT, 1, 0); | |
453 | ||
454 | mf->code = V4L2_MBUS_FMT_SBGGR10_1X10; | |
455 | mf->colorspace = V4L2_COLORSPACE_SRGB; | |
4e96fd08 GL |
456 | |
457 | return 0; | |
458 | } | |
459 | ||
979ea1dd GL |
460 | static int mt9t031_g_chip_ident(struct v4l2_subdev *sd, |
461 | struct v4l2_dbg_chip_ident *id) | |
4e96fd08 | 462 | { |
c4ce6d14 | 463 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
979ea1dd | 464 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
4e96fd08 | 465 | |
aecde8b5 | 466 | if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR) |
4e96fd08 GL |
467 | return -EINVAL; |
468 | ||
40e2e092 | 469 | if (id->match.addr != client->addr) |
4e96fd08 GL |
470 | return -ENODEV; |
471 | ||
472 | id->ident = mt9t031->model; | |
473 | id->revision = 0; | |
474 | ||
475 | return 0; | |
476 | } | |
477 | ||
478 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
979ea1dd GL |
479 | static int mt9t031_g_register(struct v4l2_subdev *sd, |
480 | struct v4l2_dbg_register *reg) | |
4e96fd08 | 481 | { |
c4ce6d14 | 482 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
4e96fd08 | 483 | |
aecde8b5 | 484 | if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) |
4e96fd08 GL |
485 | return -EINVAL; |
486 | ||
9538e1c2 | 487 | if (reg->match.addr != client->addr) |
4e96fd08 GL |
488 | return -ENODEV; |
489 | ||
9538e1c2 | 490 | reg->val = reg_read(client, reg->reg); |
4e96fd08 GL |
491 | |
492 | if (reg->val > 0xffff) | |
493 | return -EIO; | |
494 | ||
495 | return 0; | |
496 | } | |
497 | ||
979ea1dd GL |
498 | static int mt9t031_s_register(struct v4l2_subdev *sd, |
499 | struct v4l2_dbg_register *reg) | |
4e96fd08 | 500 | { |
c4ce6d14 | 501 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
4e96fd08 | 502 | |
aecde8b5 | 503 | if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) |
4e96fd08 GL |
504 | return -EINVAL; |
505 | ||
9538e1c2 | 506 | if (reg->match.addr != client->addr) |
4e96fd08 GL |
507 | return -ENODEV; |
508 | ||
9538e1c2 | 509 | if (reg_write(client, reg->reg, reg->val) < 0) |
4e96fd08 GL |
510 | return -EIO; |
511 | ||
512 | return 0; | |
513 | } | |
514 | #endif | |
515 | ||
979ea1dd | 516 | static int mt9t031_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
4e96fd08 | 517 | { |
c4ce6d14 | 518 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
979ea1dd | 519 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
4e96fd08 GL |
520 | int data; |
521 | ||
522 | switch (ctrl->id) { | |
523 | case V4L2_CID_VFLIP: | |
9538e1c2 | 524 | data = reg_read(client, MT9T031_READ_MODE_2); |
4e96fd08 GL |
525 | if (data < 0) |
526 | return -EIO; | |
527 | ctrl->value = !!(data & 0x8000); | |
528 | break; | |
529 | case V4L2_CID_HFLIP: | |
9538e1c2 | 530 | data = reg_read(client, MT9T031_READ_MODE_2); |
4e96fd08 GL |
531 | if (data < 0) |
532 | return -EIO; | |
533 | ctrl->value = !!(data & 0x4000); | |
534 | break; | |
535 | case V4L2_CID_EXPOSURE_AUTO: | |
536 | ctrl->value = mt9t031->autoexposure; | |
537 | break; | |
96c75399 GL |
538 | case V4L2_CID_GAIN: |
539 | ctrl->value = mt9t031->gain; | |
540 | break; | |
541 | case V4L2_CID_EXPOSURE: | |
542 | ctrl->value = mt9t031->exposure; | |
543 | break; | |
4e96fd08 GL |
544 | } |
545 | return 0; | |
546 | } | |
547 | ||
979ea1dd | 548 | static int mt9t031_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
4e96fd08 | 549 | { |
c4ce6d14 | 550 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
979ea1dd | 551 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
4e96fd08 GL |
552 | const struct v4l2_queryctrl *qctrl; |
553 | int data; | |
554 | ||
4e96fd08 GL |
555 | switch (ctrl->id) { |
556 | case V4L2_CID_VFLIP: | |
557 | if (ctrl->value) | |
9538e1c2 | 558 | data = reg_set(client, MT9T031_READ_MODE_2, 0x8000); |
4e96fd08 | 559 | else |
9538e1c2 | 560 | data = reg_clear(client, MT9T031_READ_MODE_2, 0x8000); |
4e96fd08 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, MT9T031_READ_MODE_2, 0x4000); |
4e96fd08 | 567 | else |
9538e1c2 | 568 | data = reg_clear(client, MT9T031_READ_MODE_2, 0x4000); |
4e96fd08 GL |
569 | if (data < 0) |
570 | return -EIO; | |
571 | break; | |
572 | case V4L2_CID_GAIN: | |
a3a4ac14 | 573 | qctrl = &mt9t031_controls[MT9T031_CTRL_GAIN]; |
4e96fd08 GL |
574 | if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum) |
575 | return -EINVAL; | |
576 | /* See Datasheet Table 7, Gain settings. */ | |
577 | if (ctrl->value <= qctrl->default_value) { | |
578 | /* Pack it into 0..1 step 0.125, register values 0..8 */ | |
579 | unsigned long range = qctrl->default_value - qctrl->minimum; | |
580 | data = ((ctrl->value - qctrl->minimum) * 8 + range / 2) / range; | |
581 | ||
85f8be68 | 582 | dev_dbg(&client->dev, "Setting gain %d\n", data); |
9538e1c2 | 583 | data = reg_write(client, MT9T031_GLOBAL_GAIN, data); |
4e96fd08 GL |
584 | if (data < 0) |
585 | return -EIO; | |
586 | } else { | |
70e1d353 | 587 | /* Pack it into 1.125..128 variable step, register values 9..0x7860 */ |
4e96fd08 GL |
588 | /* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */ |
589 | unsigned long range = qctrl->maximum - qctrl->default_value - 1; | |
70e1d353 | 590 | /* calculated gain: map 65..127 to 9..1024 step 0.125 */ |
4e96fd08 | 591 | unsigned long gain = ((ctrl->value - qctrl->default_value - 1) * |
70e1d353 | 592 | 1015 + range / 2) / range + 9; |
4e96fd08 | 593 | |
70e1d353 | 594 | if (gain <= 32) /* calculated gain 9..32 -> 9..32 */ |
4e96fd08 | 595 | data = gain; |
70e1d353 | 596 | else if (gain <= 64) /* calculated gain 33..64 -> 0x51..0x60 */ |
4e96fd08 GL |
597 | data = ((gain - 32) * 16 + 16) / 32 + 80; |
598 | else | |
70e1d353 GL |
599 | /* calculated gain 65..1024 -> (1..120) << 8 + 0x60 */ |
600 | data = (((gain - 64 + 7) * 32) & 0xff00) | 0x60; | |
4e96fd08 | 601 | |
85f8be68 | 602 | dev_dbg(&client->dev, "Set gain from 0x%x to 0x%x\n", |
9538e1c2 GL |
603 | reg_read(client, MT9T031_GLOBAL_GAIN), data); |
604 | data = reg_write(client, MT9T031_GLOBAL_GAIN, data); | |
4e96fd08 GL |
605 | if (data < 0) |
606 | return -EIO; | |
607 | } | |
608 | ||
609 | /* Success */ | |
96c75399 | 610 | mt9t031->gain = ctrl->value; |
4e96fd08 GL |
611 | break; |
612 | case V4L2_CID_EXPOSURE: | |
a3a4ac14 | 613 | qctrl = &mt9t031_controls[MT9T031_CTRL_EXPOSURE]; |
4e96fd08 GL |
614 | /* mt9t031 has maximum == default */ |
615 | if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum) | |
616 | return -EINVAL; | |
617 | else { | |
618 | const unsigned long range = qctrl->maximum - qctrl->minimum; | |
619 | const u32 shutter = ((ctrl->value - qctrl->minimum) * 1048 + | |
620 | range / 2) / range + 1; | |
621 | u32 old; | |
622 | ||
9538e1c2 | 623 | get_shutter(client, &old); |
85f8be68 | 624 | dev_dbg(&client->dev, "Set shutter from %u to %u\n", |
4e96fd08 | 625 | old, shutter); |
9538e1c2 | 626 | if (set_shutter(client, shutter) < 0) |
4e96fd08 | 627 | return -EIO; |
96c75399 | 628 | mt9t031->exposure = ctrl->value; |
4e96fd08 GL |
629 | mt9t031->autoexposure = 0; |
630 | } | |
631 | break; | |
632 | case V4L2_CID_EXPOSURE_AUTO: | |
633 | if (ctrl->value) { | |
634 | const u16 vblank = MT9T031_VERTICAL_BLANK; | |
635 | const u32 shutter_max = MT9T031_MAX_HEIGHT + vblank; | |
96c75399 | 636 | unsigned int total_h = mt9t031->rect.height + |
32536108 | 637 | mt9t031->y_skip_top + vblank; |
96c75399 GL |
638 | |
639 | if (set_shutter(client, total_h) < 0) | |
4e96fd08 | 640 | return -EIO; |
a3a4ac14 | 641 | qctrl = &mt9t031_controls[MT9T031_CTRL_EXPOSURE]; |
96c75399 GL |
642 | mt9t031->exposure = (shutter_max / 2 + (total_h - 1) * |
643 | (qctrl->maximum - qctrl->minimum)) / | |
4e96fd08 GL |
644 | shutter_max + qctrl->minimum; |
645 | mt9t031->autoexposure = 1; | |
646 | } else | |
647 | mt9t031->autoexposure = 0; | |
648 | break; | |
a3a4ac14 GL |
649 | default: |
650 | return -EINVAL; | |
4e96fd08 GL |
651 | } |
652 | return 0; | |
653 | } | |
654 | ||
535653b1 VL |
655 | /* |
656 | * Power Management: | |
657 | * This function does nothing for now but must be present for pm to work | |
658 | */ | |
659 | static int mt9t031_runtime_suspend(struct device *dev) | |
660 | { | |
661 | return 0; | |
662 | } | |
663 | ||
664 | /* | |
665 | * Power Management: | |
666 | * COLUMN_ADDRESS_MODE and ROW_ADDRESS_MODE are not rewritten if unchanged | |
667 | * they are however changed at reset if the platform hook is present | |
668 | * thus we rewrite them with the values stored by the driver | |
669 | */ | |
670 | static int mt9t031_runtime_resume(struct device *dev) | |
671 | { | |
672 | struct video_device *vdev = to_video_device(dev); | |
7dfff953 | 673 | struct soc_camera_device *icd = dev_get_drvdata(vdev->parent); |
535653b1 | 674 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
c4ce6d14 | 675 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
535653b1 VL |
676 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
677 | ||
678 | int ret; | |
679 | u16 xbin, ybin; | |
680 | ||
681 | xbin = min(mt9t031->xskip, (u16)3); | |
682 | ybin = min(mt9t031->yskip, (u16)3); | |
683 | ||
684 | ret = reg_write(client, MT9T031_COLUMN_ADDRESS_MODE, | |
685 | ((xbin - 1) << 4) | (mt9t031->xskip - 1)); | |
686 | if (ret < 0) | |
687 | return ret; | |
688 | ||
689 | ret = reg_write(client, MT9T031_ROW_ADDRESS_MODE, | |
690 | ((ybin - 1) << 4) | (mt9t031->yskip - 1)); | |
691 | if (ret < 0) | |
692 | return ret; | |
693 | ||
694 | return 0; | |
695 | } | |
696 | ||
697 | static struct dev_pm_ops mt9t031_dev_pm_ops = { | |
698 | .runtime_suspend = mt9t031_runtime_suspend, | |
699 | .runtime_resume = mt9t031_runtime_resume, | |
700 | }; | |
701 | ||
702 | static struct device_type mt9t031_dev_type = { | |
703 | .name = "MT9T031", | |
704 | .pm = &mt9t031_dev_pm_ops, | |
705 | }; | |
706 | ||
5d28d525 GL |
707 | /* |
708 | * Interface active, can use i2c. If it fails, it can indeed mean, that | |
709 | * this wasn't our capture interface, so, we wait for the right one | |
710 | */ | |
979ea1dd | 711 | static int mt9t031_video_probe(struct i2c_client *client) |
4e96fd08 | 712 | { |
979ea1dd | 713 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
535653b1 | 714 | struct video_device *vdev = soc_camera_i2c_to_vdev(client); |
4e96fd08 | 715 | s32 data; |
a4c56fd8 | 716 | int ret; |
4e96fd08 | 717 | |
4e96fd08 | 718 | /* Enable the chip */ |
9538e1c2 | 719 | data = reg_write(client, MT9T031_CHIP_ENABLE, 1); |
85f8be68 | 720 | dev_dbg(&client->dev, "write: %d\n", data); |
4e96fd08 GL |
721 | |
722 | /* Read out the chip version register */ | |
9538e1c2 | 723 | data = reg_read(client, MT9T031_CHIP_VERSION); |
4e96fd08 GL |
724 | |
725 | switch (data) { | |
726 | case 0x1621: | |
727 | mt9t031->model = V4L2_IDENT_MT9T031; | |
4e96fd08 GL |
728 | break; |
729 | default: | |
85f8be68 | 730 | dev_err(&client->dev, |
4e96fd08 | 731 | "No MT9T031 chip detected, register read %x\n", data); |
40e2e092 | 732 | return -ENODEV; |
4e96fd08 GL |
733 | } |
734 | ||
85f8be68 | 735 | dev_info(&client->dev, "Detected a MT9T031 chip ID %x\n", data); |
4e96fd08 | 736 | |
a4c56fd8 GL |
737 | ret = mt9t031_idle(client); |
738 | if (ret < 0) | |
739 | dev_err(&client->dev, "Failed to initialise the camera\n"); | |
535653b1 VL |
740 | else |
741 | vdev->dev.type = &mt9t031_dev_type; | |
a4c56fd8 | 742 | |
96c75399 GL |
743 | /* mt9t031_idle() has reset the chip to default. */ |
744 | mt9t031->exposure = 255; | |
745 | mt9t031->gain = 64; | |
746 | ||
a4c56fd8 | 747 | return ret; |
4e96fd08 GL |
748 | } |
749 | ||
32536108 GL |
750 | static int mt9t031_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines) |
751 | { | |
c4ce6d14 | 752 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
32536108 GL |
753 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
754 | ||
755 | *lines = mt9t031->y_skip_top; | |
756 | ||
757 | return 0; | |
758 | } | |
759 | ||
979ea1dd GL |
760 | static struct v4l2_subdev_core_ops mt9t031_subdev_core_ops = { |
761 | .g_ctrl = mt9t031_g_ctrl, | |
762 | .s_ctrl = mt9t031_s_ctrl, | |
763 | .g_chip_ident = mt9t031_g_chip_ident, | |
764 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
765 | .g_register = mt9t031_g_register, | |
766 | .s_register = mt9t031_s_register, | |
767 | #endif | |
768 | }; | |
769 | ||
3805f201 | 770 | static int mt9t031_enum_fmt(struct v4l2_subdev *sd, unsigned int index, |
760697be GL |
771 | enum v4l2_mbus_pixelcode *code) |
772 | { | |
773 | if (index) | |
774 | return -EINVAL; | |
775 | ||
776 | *code = V4L2_MBUS_FMT_SBGGR10_1X10; | |
777 | return 0; | |
778 | } | |
779 | ||
a3505755 GL |
780 | static int mt9t031_g_mbus_config(struct v4l2_subdev *sd, |
781 | struct v4l2_mbus_config *cfg) | |
782 | { | |
783 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
784 | struct soc_camera_device *icd = client->dev.platform_data; | |
785 | struct soc_camera_link *icl = to_soc_camera_link(icd); | |
786 | ||
787 | cfg->flags = V4L2_MBUS_MASTER | V4L2_MBUS_PCLK_SAMPLE_RISING | | |
788 | V4L2_MBUS_PCLK_SAMPLE_FALLING | V4L2_MBUS_HSYNC_ACTIVE_HIGH | | |
789 | V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_DATA_ACTIVE_HIGH; | |
790 | cfg->type = V4L2_MBUS_PARALLEL; | |
791 | cfg->flags = soc_camera_apply_board_flags(icl, cfg); | |
792 | ||
793 | return 0; | |
794 | } | |
795 | ||
796 | static int mt9t031_s_mbus_config(struct v4l2_subdev *sd, | |
797 | const struct v4l2_mbus_config *cfg) | |
798 | { | |
799 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
800 | struct soc_camera_device *icd = client->dev.platform_data; | |
801 | struct soc_camera_link *icl = to_soc_camera_link(icd); | |
802 | ||
803 | if (soc_camera_apply_board_flags(icl, cfg) & | |
804 | V4L2_MBUS_PCLK_SAMPLE_FALLING) | |
805 | return reg_clear(client, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000); | |
806 | else | |
807 | return reg_set(client, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000); | |
808 | } | |
809 | ||
979ea1dd GL |
810 | static struct v4l2_subdev_video_ops mt9t031_subdev_video_ops = { |
811 | .s_stream = mt9t031_s_stream, | |
760697be GL |
812 | .s_mbus_fmt = mt9t031_s_fmt, |
813 | .g_mbus_fmt = mt9t031_g_fmt, | |
814 | .try_mbus_fmt = mt9t031_try_fmt, | |
08590b96 | 815 | .s_crop = mt9t031_s_crop, |
6a6c8786 GL |
816 | .g_crop = mt9t031_g_crop, |
817 | .cropcap = mt9t031_cropcap, | |
760697be | 818 | .enum_mbus_fmt = mt9t031_enum_fmt, |
a3505755 GL |
819 | .g_mbus_config = mt9t031_g_mbus_config, |
820 | .s_mbus_config = mt9t031_s_mbus_config, | |
979ea1dd GL |
821 | }; |
822 | ||
32536108 GL |
823 | static struct v4l2_subdev_sensor_ops mt9t031_subdev_sensor_ops = { |
824 | .g_skip_top_lines = mt9t031_g_skip_top_lines, | |
825 | }; | |
826 | ||
979ea1dd GL |
827 | static struct v4l2_subdev_ops mt9t031_subdev_ops = { |
828 | .core = &mt9t031_subdev_core_ops, | |
829 | .video = &mt9t031_subdev_video_ops, | |
32536108 | 830 | .sensor = &mt9t031_subdev_sensor_ops, |
979ea1dd GL |
831 | }; |
832 | ||
4e96fd08 GL |
833 | static int mt9t031_probe(struct i2c_client *client, |
834 | const struct i2c_device_id *did) | |
835 | { | |
836 | struct mt9t031 *mt9t031; | |
40e2e092 | 837 | struct soc_camera_device *icd = client->dev.platform_data; |
4e96fd08 | 838 | struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); |
4e96fd08 GL |
839 | int ret; |
840 | ||
a3a4ac14 GL |
841 | if (icd) { |
842 | struct soc_camera_link *icl = to_soc_camera_link(icd); | |
843 | if (!icl) { | |
844 | dev_err(&client->dev, "MT9T031 driver needs platform data\n"); | |
845 | return -EINVAL; | |
846 | } | |
40e2e092 | 847 | |
a3a4ac14 | 848 | icd->ops = &mt9t031_ops; |
4e96fd08 GL |
849 | } |
850 | ||
851 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) { | |
852 | dev_warn(&adapter->dev, | |
853 | "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n"); | |
854 | return -EIO; | |
855 | } | |
856 | ||
857 | mt9t031 = kzalloc(sizeof(struct mt9t031), GFP_KERNEL); | |
858 | if (!mt9t031) | |
859 | return -ENOMEM; | |
860 | ||
979ea1dd | 861 | v4l2_i2c_subdev_init(&mt9t031->subdev, client, &mt9t031_subdev_ops); |
4e96fd08 | 862 | |
32536108 | 863 | mt9t031->y_skip_top = 0; |
6a6c8786 GL |
864 | mt9t031->rect.left = MT9T031_COLUMN_SKIP; |
865 | mt9t031->rect.top = MT9T031_ROW_SKIP; | |
866 | mt9t031->rect.width = MT9T031_MAX_WIDTH; | |
867 | mt9t031->rect.height = MT9T031_MAX_HEIGHT; | |
868 | ||
5d28d525 GL |
869 | /* |
870 | * Simulated autoexposure. If enabled, we calculate shutter width | |
871 | * ourselves in the driver based on vertical blanking and frame width | |
872 | */ | |
4e96fd08 GL |
873 | mt9t031->autoexposure = 1; |
874 | ||
875 | mt9t031->xskip = 1; | |
876 | mt9t031->yskip = 1; | |
877 | ||
979ea1dd GL |
878 | mt9t031_idle(client); |
879 | ||
880 | ret = mt9t031_video_probe(client); | |
881 | ||
882 | mt9t031_disable(client); | |
883 | ||
40e2e092 | 884 | if (ret) { |
a3a4ac14 GL |
885 | if (icd) |
886 | icd->ops = NULL; | |
40e2e092 GL |
887 | kfree(mt9t031); |
888 | } | |
4e96fd08 | 889 | |
4e96fd08 GL |
890 | return ret; |
891 | } | |
892 | ||
893 | static int mt9t031_remove(struct i2c_client *client) | |
894 | { | |
979ea1dd | 895 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
40e2e092 | 896 | struct soc_camera_device *icd = client->dev.platform_data; |
4e96fd08 | 897 | |
a3a4ac14 GL |
898 | if (icd) |
899 | icd->ops = NULL; | |
4e96fd08 GL |
900 | kfree(mt9t031); |
901 | ||
902 | return 0; | |
903 | } | |
904 | ||
905 | static const struct i2c_device_id mt9t031_id[] = { | |
906 | { "mt9t031", 0 }, | |
907 | { } | |
908 | }; | |
909 | MODULE_DEVICE_TABLE(i2c, mt9t031_id); | |
910 | ||
911 | static struct i2c_driver mt9t031_i2c_driver = { | |
912 | .driver = { | |
913 | .name = "mt9t031", | |
914 | }, | |
915 | .probe = mt9t031_probe, | |
916 | .remove = mt9t031_remove, | |
917 | .id_table = mt9t031_id, | |
918 | }; | |
919 | ||
920 | static int __init mt9t031_mod_init(void) | |
921 | { | |
922 | return i2c_add_driver(&mt9t031_i2c_driver); | |
923 | } | |
924 | ||
925 | static void __exit mt9t031_mod_exit(void) | |
926 | { | |
927 | i2c_del_driver(&mt9t031_i2c_driver); | |
928 | } | |
929 | ||
930 | module_init(mt9t031_mod_init); | |
931 | module_exit(mt9t031_mod_exit); | |
932 | ||
933 | MODULE_DESCRIPTION("Micron MT9T031 Camera driver"); | |
934 | MODULE_AUTHOR("Guennadi Liakhovetski <lg@denx.de>"); | |
935 | MODULE_LICENSE("GPL v2"); |