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> |
535653b1 VL |
19 | #include <media/v4l2-chip-ident.h> |
20 | #include <media/v4l2-subdev.h> | |
4e96fd08 | 21 | |
5d28d525 GL |
22 | /* |
23 | * mt9t031 i2c address 0x5d | |
979ea1dd | 24 | * The platform has to define i2c_board_info and link to it from |
5d28d525 GL |
25 | * struct soc_camera_link |
26 | */ | |
4e96fd08 GL |
27 | |
28 | /* mt9t031 selected register addresses */ | |
29 | #define MT9T031_CHIP_VERSION 0x00 | |
30 | #define MT9T031_ROW_START 0x01 | |
31 | #define MT9T031_COLUMN_START 0x02 | |
32 | #define MT9T031_WINDOW_HEIGHT 0x03 | |
33 | #define MT9T031_WINDOW_WIDTH 0x04 | |
34 | #define MT9T031_HORIZONTAL_BLANKING 0x05 | |
35 | #define MT9T031_VERTICAL_BLANKING 0x06 | |
36 | #define MT9T031_OUTPUT_CONTROL 0x07 | |
37 | #define MT9T031_SHUTTER_WIDTH_UPPER 0x08 | |
38 | #define MT9T031_SHUTTER_WIDTH 0x09 | |
39 | #define MT9T031_PIXEL_CLOCK_CONTROL 0x0a | |
40 | #define MT9T031_FRAME_RESTART 0x0b | |
41 | #define MT9T031_SHUTTER_DELAY 0x0c | |
42 | #define MT9T031_RESET 0x0d | |
43 | #define MT9T031_READ_MODE_1 0x1e | |
44 | #define MT9T031_READ_MODE_2 0x20 | |
45 | #define MT9T031_READ_MODE_3 0x21 | |
46 | #define MT9T031_ROW_ADDRESS_MODE 0x22 | |
47 | #define MT9T031_COLUMN_ADDRESS_MODE 0x23 | |
48 | #define MT9T031_GLOBAL_GAIN 0x35 | |
49 | #define MT9T031_CHIP_ENABLE 0xF8 | |
50 | ||
51 | #define MT9T031_MAX_HEIGHT 1536 | |
52 | #define MT9T031_MAX_WIDTH 2048 | |
53 | #define MT9T031_MIN_HEIGHT 2 | |
6a6c8786 | 54 | #define MT9T031_MIN_WIDTH 18 |
4e96fd08 GL |
55 | #define MT9T031_HORIZONTAL_BLANK 142 |
56 | #define MT9T031_VERTICAL_BLANK 25 | |
57 | #define MT9T031_COLUMN_SKIP 32 | |
58 | #define MT9T031_ROW_SKIP 20 | |
59 | ||
60 | #define MT9T031_BUS_PARAM (SOCAM_PCLK_SAMPLE_RISING | \ | |
61 | SOCAM_PCLK_SAMPLE_FALLING | SOCAM_HSYNC_ACTIVE_HIGH | \ | |
62 | SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_DATA_ACTIVE_HIGH | \ | |
63 | SOCAM_MASTER | SOCAM_DATAWIDTH_10) | |
64 | ||
4e96fd08 | 65 | struct mt9t031 { |
979ea1dd | 66 | struct v4l2_subdev subdev; |
6a6c8786 | 67 | struct v4l2_rect rect; /* Sensor window */ |
4e96fd08 | 68 | int model; /* V4L2_IDENT_MT9T031* codes from v4l2-chip-ident.h */ |
4e96fd08 GL |
69 | u16 xskip; |
70 | u16 yskip; | |
96c75399 | 71 | unsigned int gain; |
32536108 | 72 | unsigned short y_skip_top; /* Lines to skip at the top */ |
96c75399 | 73 | unsigned int exposure; |
6a6c8786 | 74 | unsigned char autoexposure; |
4e96fd08 GL |
75 | }; |
76 | ||
979ea1dd GL |
77 | static struct mt9t031 *to_mt9t031(const struct i2c_client *client) |
78 | { | |
79 | return container_of(i2c_get_clientdata(client), struct mt9t031, subdev); | |
80 | } | |
81 | ||
9538e1c2 | 82 | static int reg_read(struct i2c_client *client, const u8 reg) |
4e96fd08 | 83 | { |
4e96fd08 GL |
84 | s32 data = i2c_smbus_read_word_data(client, reg); |
85 | return data < 0 ? data : swab16(data); | |
86 | } | |
87 | ||
9538e1c2 | 88 | static int reg_write(struct i2c_client *client, const u8 reg, |
4e96fd08 GL |
89 | const u16 data) |
90 | { | |
9538e1c2 | 91 | return i2c_smbus_write_word_data(client, reg, swab16(data)); |
4e96fd08 GL |
92 | } |
93 | ||
9538e1c2 | 94 | static int reg_set(struct i2c_client *client, const u8 reg, |
4e96fd08 GL |
95 | const u16 data) |
96 | { | |
97 | int ret; | |
98 | ||
9538e1c2 | 99 | ret = reg_read(client, reg); |
4e96fd08 GL |
100 | if (ret < 0) |
101 | return ret; | |
9538e1c2 | 102 | return reg_write(client, reg, ret | data); |
4e96fd08 GL |
103 | } |
104 | ||
9538e1c2 | 105 | static int reg_clear(struct i2c_client *client, const u8 reg, |
4e96fd08 GL |
106 | const u16 data) |
107 | { | |
108 | int ret; | |
109 | ||
9538e1c2 | 110 | ret = reg_read(client, reg); |
4e96fd08 GL |
111 | if (ret < 0) |
112 | return ret; | |
9538e1c2 | 113 | return reg_write(client, reg, ret & ~data); |
4e96fd08 GL |
114 | } |
115 | ||
9538e1c2 | 116 | static int set_shutter(struct i2c_client *client, const u32 data) |
4e96fd08 GL |
117 | { |
118 | int ret; | |
119 | ||
9538e1c2 | 120 | ret = reg_write(client, MT9T031_SHUTTER_WIDTH_UPPER, data >> 16); |
4e96fd08 GL |
121 | |
122 | if (ret >= 0) | |
9538e1c2 | 123 | ret = reg_write(client, MT9T031_SHUTTER_WIDTH, data & 0xffff); |
4e96fd08 GL |
124 | |
125 | return ret; | |
126 | } | |
127 | ||
9538e1c2 | 128 | static int get_shutter(struct i2c_client *client, u32 *data) |
4e96fd08 GL |
129 | { |
130 | int ret; | |
131 | ||
9538e1c2 | 132 | ret = reg_read(client, MT9T031_SHUTTER_WIDTH_UPPER); |
4e96fd08 GL |
133 | *data = ret << 16; |
134 | ||
135 | if (ret >= 0) | |
9538e1c2 | 136 | ret = reg_read(client, MT9T031_SHUTTER_WIDTH); |
4e96fd08 GL |
137 | *data |= ret & 0xffff; |
138 | ||
139 | return ret < 0 ? ret : 0; | |
140 | } | |
141 | ||
979ea1dd | 142 | static int mt9t031_idle(struct i2c_client *client) |
4e96fd08 GL |
143 | { |
144 | int ret; | |
145 | ||
146 | /* Disable chip output, synchronous option update */ | |
9538e1c2 | 147 | ret = reg_write(client, MT9T031_RESET, 1); |
4e96fd08 | 148 | if (ret >= 0) |
9538e1c2 | 149 | ret = reg_write(client, MT9T031_RESET, 0); |
4e96fd08 | 150 | if (ret >= 0) |
9538e1c2 | 151 | ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 2); |
4e96fd08 GL |
152 | |
153 | return ret >= 0 ? 0 : -EIO; | |
154 | } | |
155 | ||
979ea1dd | 156 | static int mt9t031_disable(struct i2c_client *client) |
4e96fd08 GL |
157 | { |
158 | /* Disable the chip */ | |
9538e1c2 | 159 | reg_clear(client, MT9T031_OUTPUT_CONTROL, 2); |
f9826514 | 160 | |
4e96fd08 GL |
161 | return 0; |
162 | } | |
163 | ||
979ea1dd GL |
164 | static int mt9t031_s_stream(struct v4l2_subdev *sd, int enable) |
165 | { | |
c4ce6d14 | 166 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
979ea1dd GL |
167 | int ret; |
168 | ||
169 | if (enable) | |
170 | /* Switch to master "normal" mode */ | |
171 | ret = reg_set(client, MT9T031_OUTPUT_CONTROL, 2); | |
172 | else | |
173 | /* Stop sensor readout */ | |
174 | ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 2); | |
175 | ||
176 | if (ret < 0) | |
4e96fd08 | 177 | return -EIO; |
979ea1dd | 178 | |
4e96fd08 GL |
179 | return 0; |
180 | } | |
181 | ||
182 | static int mt9t031_set_bus_param(struct soc_camera_device *icd, | |
183 | unsigned long flags) | |
184 | { | |
40e2e092 | 185 | struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd)); |
9538e1c2 | 186 | |
4e96fd08 GL |
187 | /* The caller should have queried our parameters, check anyway */ |
188 | if (flags & ~MT9T031_BUS_PARAM) | |
189 | return -EINVAL; | |
190 | ||
191 | if (flags & SOCAM_PCLK_SAMPLE_FALLING) | |
9538e1c2 | 192 | reg_clear(client, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000); |
c98afbfc | 193 | else |
9538e1c2 | 194 | reg_set(client, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000); |
4e96fd08 GL |
195 | |
196 | return 0; | |
197 | } | |
198 | ||
199 | static unsigned long mt9t031_query_bus_param(struct soc_camera_device *icd) | |
200 | { | |
40e2e092 | 201 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
4e96fd08 GL |
202 | |
203 | return soc_camera_apply_sensor_flags(icl, MT9T031_BUS_PARAM); | |
204 | } | |
205 | ||
a3a4ac14 GL |
206 | enum { |
207 | MT9T031_CTRL_VFLIP, | |
208 | MT9T031_CTRL_HFLIP, | |
209 | MT9T031_CTRL_GAIN, | |
210 | MT9T031_CTRL_EXPOSURE, | |
211 | MT9T031_CTRL_EXPOSURE_AUTO, | |
212 | }; | |
213 | ||
214 | static const struct v4l2_queryctrl mt9t031_controls[] = { | |
215 | [MT9T031_CTRL_VFLIP] = { | |
216 | .id = V4L2_CID_VFLIP, | |
217 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
218 | .name = "Flip Vertically", | |
219 | .minimum = 0, | |
220 | .maximum = 1, | |
221 | .step = 1, | |
222 | .default_value = 0, | |
223 | }, | |
224 | [MT9T031_CTRL_HFLIP] = { | |
225 | .id = V4L2_CID_HFLIP, | |
226 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
227 | .name = "Flip Horizontally", | |
228 | .minimum = 0, | |
229 | .maximum = 1, | |
230 | .step = 1, | |
231 | .default_value = 0, | |
232 | }, | |
233 | [MT9T031_CTRL_GAIN] = { | |
234 | .id = V4L2_CID_GAIN, | |
235 | .type = V4L2_CTRL_TYPE_INTEGER, | |
236 | .name = "Gain", | |
237 | .minimum = 0, | |
238 | .maximum = 127, | |
239 | .step = 1, | |
240 | .default_value = 64, | |
241 | .flags = V4L2_CTRL_FLAG_SLIDER, | |
242 | }, | |
243 | [MT9T031_CTRL_EXPOSURE] = { | |
244 | .id = V4L2_CID_EXPOSURE, | |
245 | .type = V4L2_CTRL_TYPE_INTEGER, | |
246 | .name = "Exposure", | |
247 | .minimum = 1, | |
248 | .maximum = 255, | |
249 | .step = 1, | |
250 | .default_value = 255, | |
251 | .flags = V4L2_CTRL_FLAG_SLIDER, | |
252 | }, | |
253 | [MT9T031_CTRL_EXPOSURE_AUTO] = { | |
254 | .id = V4L2_CID_EXPOSURE_AUTO, | |
255 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
256 | .name = "Automatic Exposure", | |
257 | .minimum = 0, | |
258 | .maximum = 1, | |
259 | .step = 1, | |
260 | .default_value = 1, | |
261 | } | |
262 | }; | |
263 | ||
264 | static struct soc_camera_ops mt9t031_ops = { | |
265 | .set_bus_param = mt9t031_set_bus_param, | |
266 | .query_bus_param = mt9t031_query_bus_param, | |
267 | .controls = mt9t031_controls, | |
268 | .num_controls = ARRAY_SIZE(mt9t031_controls), | |
269 | }; | |
270 | ||
6a6c8786 GL |
271 | /* target must be _even_ */ |
272 | static u16 mt9t031_skip(s32 *source, s32 target, s32 max) | |
70e1d353 | 273 | { |
6a6c8786 GL |
274 | unsigned int skip; |
275 | ||
276 | if (*source < target + target / 2) { | |
277 | *source = target; | |
278 | return 1; | |
279 | } | |
280 | ||
281 | skip = min(max, *source + target / 2) / target; | |
282 | if (skip > 8) | |
283 | skip = 8; | |
284 | *source = target * skip; | |
285 | ||
286 | return skip; | |
70e1d353 GL |
287 | } |
288 | ||
6a6c8786 | 289 | /* rect is the sensor rectangle, the caller guarantees parameter validity */ |
a3a4ac14 | 290 | static int mt9t031_set_params(struct i2c_client *client, |
09e231b3 | 291 | struct v4l2_rect *rect, u16 xskip, u16 yskip) |
4e96fd08 | 292 | { |
979ea1dd | 293 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
4e96fd08 | 294 | int ret; |
6a6c8786 | 295 | u16 xbin, ybin; |
4e96fd08 GL |
296 | const u16 hblank = MT9T031_HORIZONTAL_BLANK, |
297 | vblank = MT9T031_VERTICAL_BLANK; | |
4e96fd08 GL |
298 | |
299 | xbin = min(xskip, (u16)3); | |
300 | ybin = min(yskip, (u16)3); | |
301 | ||
6a6c8786 GL |
302 | /* |
303 | * Could just do roundup(rect->left, [xy]bin * 2); but this is cheaper. | |
304 | * There is always a valid suitably aligned value. The worst case is | |
305 | * xbin = 3, width = 2048. Then we will start at 36, the last read out | |
306 | * pixel will be 2083, which is < 2085 - first black pixel. | |
307 | * | |
308 | * MT9T031 datasheet imposes window left border alignment, depending on | |
309 | * the selected xskip. Failing to conform to this requirement produces | |
310 | * dark horizontal stripes in the image. However, even obeying to this | |
311 | * requirement doesn't eliminate the stripes in all configurations. They | |
312 | * appear "locally reproducibly," but can differ between tests under | |
313 | * different lighting conditions. | |
314 | */ | |
4e96fd08 | 315 | switch (xbin) { |
6a6c8786 GL |
316 | case 1: |
317 | rect->left &= ~1; | |
4e96fd08 | 318 | break; |
4e96fd08 | 319 | case 2: |
6a6c8786 | 320 | rect->left &= ~3; |
4e96fd08 GL |
321 | break; |
322 | case 3: | |
6a6c8786 GL |
323 | rect->left = rect->left > roundup(MT9T031_COLUMN_SKIP, 6) ? |
324 | (rect->left / 6) * 6 : roundup(MT9T031_COLUMN_SKIP, 6); | |
4e96fd08 GL |
325 | } |
326 | ||
6a6c8786 GL |
327 | rect->top &= ~1; |
328 | ||
329 | dev_dbg(&client->dev, "skip %u:%u, rect %ux%u@%u:%u\n", | |
330 | xskip, yskip, rect->width, rect->height, rect->left, rect->top); | |
331 | ||
70e1d353 | 332 | /* Disable register update, reconfigure atomically */ |
9538e1c2 | 333 | ret = reg_set(client, MT9T031_OUTPUT_CONTROL, 1); |
70e1d353 GL |
334 | if (ret < 0) |
335 | return ret; | |
336 | ||
4e96fd08 | 337 | /* Blanking and start values - default... */ |
9538e1c2 | 338 | ret = reg_write(client, MT9T031_HORIZONTAL_BLANKING, hblank); |
4e96fd08 | 339 | if (ret >= 0) |
9538e1c2 | 340 | ret = reg_write(client, MT9T031_VERTICAL_BLANKING, vblank); |
4e96fd08 | 341 | |
09e231b3 | 342 | if (yskip != mt9t031->yskip || xskip != mt9t031->xskip) { |
4e96fd08 GL |
343 | /* Binning, skipping */ |
344 | if (ret >= 0) | |
9538e1c2 | 345 | ret = reg_write(client, MT9T031_COLUMN_ADDRESS_MODE, |
4e96fd08 GL |
346 | ((xbin - 1) << 4) | (xskip - 1)); |
347 | if (ret >= 0) | |
9538e1c2 | 348 | ret = reg_write(client, MT9T031_ROW_ADDRESS_MODE, |
4e96fd08 GL |
349 | ((ybin - 1) << 4) | (yskip - 1)); |
350 | } | |
6a6c8786 GL |
351 | dev_dbg(&client->dev, "new physical left %u, top %u\n", |
352 | rect->left, rect->top); | |
4e96fd08 | 353 | |
5d28d525 GL |
354 | /* |
355 | * The caller provides a supported format, as guaranteed by | |
356 | * icd->try_fmt_cap(), soc_camera_s_crop() and soc_camera_cropcap() | |
357 | */ | |
4e96fd08 | 358 | if (ret >= 0) |
6a6c8786 | 359 | ret = reg_write(client, MT9T031_COLUMN_START, rect->left); |
4e96fd08 | 360 | if (ret >= 0) |
6a6c8786 | 361 | ret = reg_write(client, MT9T031_ROW_START, rect->top); |
4e96fd08 | 362 | if (ret >= 0) |
6a6c8786 | 363 | ret = reg_write(client, MT9T031_WINDOW_WIDTH, rect->width - 1); |
4e96fd08 | 364 | if (ret >= 0) |
9538e1c2 | 365 | ret = reg_write(client, MT9T031_WINDOW_HEIGHT, |
32536108 | 366 | rect->height + mt9t031->y_skip_top - 1); |
4e96fd08 | 367 | if (ret >= 0 && mt9t031->autoexposure) { |
32536108 | 368 | unsigned int total_h = rect->height + mt9t031->y_skip_top + vblank; |
96c75399 | 369 | ret = set_shutter(client, total_h); |
4e96fd08 GL |
370 | if (ret >= 0) { |
371 | const u32 shutter_max = MT9T031_MAX_HEIGHT + vblank; | |
372 | const struct v4l2_queryctrl *qctrl = | |
a3a4ac14 | 373 | &mt9t031_controls[MT9T031_CTRL_EXPOSURE]; |
96c75399 GL |
374 | mt9t031->exposure = (shutter_max / 2 + (total_h - 1) * |
375 | (qctrl->maximum - qctrl->minimum)) / | |
4e96fd08 GL |
376 | shutter_max + qctrl->minimum; |
377 | } | |
378 | } | |
379 | ||
09e231b3 GL |
380 | /* Re-enable register update, commit all changes */ |
381 | if (ret >= 0) | |
9538e1c2 | 382 | ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 1); |
09e231b3 | 383 | |
6a6c8786 GL |
384 | if (ret >= 0) { |
385 | mt9t031->rect = *rect; | |
386 | mt9t031->xskip = xskip; | |
387 | mt9t031->yskip = yskip; | |
388 | } | |
389 | ||
09e231b3 GL |
390 | return ret < 0 ? ret : 0; |
391 | } | |
392 | ||
08590b96 | 393 | static int mt9t031_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) |
09e231b3 | 394 | { |
6a6c8786 | 395 | struct v4l2_rect rect = a->c; |
c4ce6d14 | 396 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
979ea1dd | 397 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
09e231b3 | 398 | |
6a6c8786 GL |
399 | rect.width = ALIGN(rect.width, 2); |
400 | rect.height = ALIGN(rect.height, 2); | |
401 | ||
402 | soc_camera_limit_side(&rect.left, &rect.width, | |
403 | MT9T031_COLUMN_SKIP, MT9T031_MIN_WIDTH, MT9T031_MAX_WIDTH); | |
404 | ||
405 | soc_camera_limit_side(&rect.top, &rect.height, | |
406 | MT9T031_ROW_SKIP, MT9T031_MIN_HEIGHT, MT9T031_MAX_HEIGHT); | |
407 | ||
a3a4ac14 | 408 | return mt9t031_set_params(client, &rect, mt9t031->xskip, mt9t031->yskip); |
6a6c8786 GL |
409 | } |
410 | ||
411 | static int mt9t031_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) | |
412 | { | |
c4ce6d14 | 413 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
6a6c8786 GL |
414 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
415 | ||
416 | a->c = mt9t031->rect; | |
417 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
e330919a | 418 | |
6a6c8786 GL |
419 | return 0; |
420 | } | |
421 | ||
422 | static int mt9t031_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a) | |
423 | { | |
424 | a->bounds.left = MT9T031_COLUMN_SKIP; | |
425 | a->bounds.top = MT9T031_ROW_SKIP; | |
426 | a->bounds.width = MT9T031_MAX_WIDTH; | |
427 | a->bounds.height = MT9T031_MAX_HEIGHT; | |
428 | a->defrect = a->bounds; | |
429 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
430 | a->pixelaspect.numerator = 1; | |
431 | a->pixelaspect.denominator = 1; | |
e330919a | 432 | |
6a6c8786 GL |
433 | return 0; |
434 | } | |
435 | ||
760697be GL |
436 | static int mt9t031_g_fmt(struct v4l2_subdev *sd, |
437 | struct v4l2_mbus_framefmt *mf) | |
6a6c8786 | 438 | { |
c4ce6d14 | 439 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
6a6c8786 | 440 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
6a6c8786 | 441 | |
760697be GL |
442 | mf->width = mt9t031->rect.width / mt9t031->xskip; |
443 | mf->height = mt9t031->rect.height / mt9t031->yskip; | |
444 | mf->code = V4L2_MBUS_FMT_SBGGR10_1X10; | |
445 | mf->colorspace = V4L2_COLORSPACE_SRGB; | |
446 | mf->field = V4L2_FIELD_NONE; | |
6a6c8786 GL |
447 | |
448 | return 0; | |
09e231b3 GL |
449 | } |
450 | ||
760697be GL |
451 | static int mt9t031_s_fmt(struct v4l2_subdev *sd, |
452 | struct v4l2_mbus_framefmt *mf) | |
09e231b3 | 453 | { |
c4ce6d14 | 454 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
979ea1dd | 455 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
09e231b3 | 456 | u16 xskip, yskip; |
6a6c8786 | 457 | struct v4l2_rect rect = mt9t031->rect; |
09e231b3 GL |
458 | |
459 | /* | |
6a6c8786 GL |
460 | * try_fmt has put width and height within limits. |
461 | * S_FMT: use binning and skipping for scaling | |
09e231b3 | 462 | */ |
760697be GL |
463 | xskip = mt9t031_skip(&rect.width, mf->width, MT9T031_MAX_WIDTH); |
464 | yskip = mt9t031_skip(&rect.height, mf->height, MT9T031_MAX_HEIGHT); | |
465 | ||
466 | mf->code = V4L2_MBUS_FMT_SBGGR10_1X10; | |
467 | mf->colorspace = V4L2_COLORSPACE_SRGB; | |
4e96fd08 | 468 | |
6a6c8786 | 469 | /* mt9t031_set_params() doesn't change width and height */ |
a3a4ac14 | 470 | return mt9t031_set_params(client, &rect, xskip, yskip); |
4e96fd08 GL |
471 | } |
472 | ||
6a6c8786 GL |
473 | /* |
474 | * If a user window larger than sensor window is requested, we'll increase the | |
475 | * sensor window. | |
476 | */ | |
760697be GL |
477 | static int mt9t031_try_fmt(struct v4l2_subdev *sd, |
478 | struct v4l2_mbus_framefmt *mf) | |
4e96fd08 | 479 | { |
653dc59b | 480 | v4l_bound_align_image( |
760697be GL |
481 | &mf->width, MT9T031_MIN_WIDTH, MT9T031_MAX_WIDTH, 1, |
482 | &mf->height, MT9T031_MIN_HEIGHT, MT9T031_MAX_HEIGHT, 1, 0); | |
483 | ||
484 | mf->code = V4L2_MBUS_FMT_SBGGR10_1X10; | |
485 | mf->colorspace = V4L2_COLORSPACE_SRGB; | |
4e96fd08 GL |
486 | |
487 | return 0; | |
488 | } | |
489 | ||
979ea1dd GL |
490 | static int mt9t031_g_chip_ident(struct v4l2_subdev *sd, |
491 | struct v4l2_dbg_chip_ident *id) | |
4e96fd08 | 492 | { |
c4ce6d14 | 493 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
979ea1dd | 494 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
4e96fd08 | 495 | |
aecde8b5 | 496 | if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR) |
4e96fd08 GL |
497 | return -EINVAL; |
498 | ||
40e2e092 | 499 | if (id->match.addr != client->addr) |
4e96fd08 GL |
500 | return -ENODEV; |
501 | ||
502 | id->ident = mt9t031->model; | |
503 | id->revision = 0; | |
504 | ||
505 | return 0; | |
506 | } | |
507 | ||
508 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
979ea1dd GL |
509 | static int mt9t031_g_register(struct v4l2_subdev *sd, |
510 | struct v4l2_dbg_register *reg) | |
4e96fd08 | 511 | { |
c4ce6d14 | 512 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
4e96fd08 | 513 | |
aecde8b5 | 514 | if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) |
4e96fd08 GL |
515 | return -EINVAL; |
516 | ||
9538e1c2 | 517 | if (reg->match.addr != client->addr) |
4e96fd08 GL |
518 | return -ENODEV; |
519 | ||
9538e1c2 | 520 | reg->val = reg_read(client, reg->reg); |
4e96fd08 GL |
521 | |
522 | if (reg->val > 0xffff) | |
523 | return -EIO; | |
524 | ||
525 | return 0; | |
526 | } | |
527 | ||
979ea1dd GL |
528 | static int mt9t031_s_register(struct v4l2_subdev *sd, |
529 | struct v4l2_dbg_register *reg) | |
4e96fd08 | 530 | { |
c4ce6d14 | 531 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
4e96fd08 | 532 | |
aecde8b5 | 533 | if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) |
4e96fd08 GL |
534 | return -EINVAL; |
535 | ||
9538e1c2 | 536 | if (reg->match.addr != client->addr) |
4e96fd08 GL |
537 | return -ENODEV; |
538 | ||
9538e1c2 | 539 | if (reg_write(client, reg->reg, reg->val) < 0) |
4e96fd08 GL |
540 | return -EIO; |
541 | ||
542 | return 0; | |
543 | } | |
544 | #endif | |
545 | ||
979ea1dd | 546 | static int mt9t031_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
4e96fd08 | 547 | { |
c4ce6d14 | 548 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
979ea1dd | 549 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
4e96fd08 GL |
550 | int data; |
551 | ||
552 | switch (ctrl->id) { | |
553 | case V4L2_CID_VFLIP: | |
9538e1c2 | 554 | data = reg_read(client, MT9T031_READ_MODE_2); |
4e96fd08 GL |
555 | if (data < 0) |
556 | return -EIO; | |
557 | ctrl->value = !!(data & 0x8000); | |
558 | break; | |
559 | case V4L2_CID_HFLIP: | |
9538e1c2 | 560 | data = reg_read(client, MT9T031_READ_MODE_2); |
4e96fd08 GL |
561 | if (data < 0) |
562 | return -EIO; | |
563 | ctrl->value = !!(data & 0x4000); | |
564 | break; | |
565 | case V4L2_CID_EXPOSURE_AUTO: | |
566 | ctrl->value = mt9t031->autoexposure; | |
567 | break; | |
96c75399 GL |
568 | case V4L2_CID_GAIN: |
569 | ctrl->value = mt9t031->gain; | |
570 | break; | |
571 | case V4L2_CID_EXPOSURE: | |
572 | ctrl->value = mt9t031->exposure; | |
573 | break; | |
4e96fd08 GL |
574 | } |
575 | return 0; | |
576 | } | |
577 | ||
979ea1dd | 578 | static int mt9t031_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
4e96fd08 | 579 | { |
c4ce6d14 | 580 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
979ea1dd | 581 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
4e96fd08 GL |
582 | const struct v4l2_queryctrl *qctrl; |
583 | int data; | |
584 | ||
4e96fd08 GL |
585 | switch (ctrl->id) { |
586 | case V4L2_CID_VFLIP: | |
587 | if (ctrl->value) | |
9538e1c2 | 588 | data = reg_set(client, MT9T031_READ_MODE_2, 0x8000); |
4e96fd08 | 589 | else |
9538e1c2 | 590 | data = reg_clear(client, MT9T031_READ_MODE_2, 0x8000); |
4e96fd08 GL |
591 | if (data < 0) |
592 | return -EIO; | |
593 | break; | |
594 | case V4L2_CID_HFLIP: | |
595 | if (ctrl->value) | |
9538e1c2 | 596 | data = reg_set(client, MT9T031_READ_MODE_2, 0x4000); |
4e96fd08 | 597 | else |
9538e1c2 | 598 | data = reg_clear(client, MT9T031_READ_MODE_2, 0x4000); |
4e96fd08 GL |
599 | if (data < 0) |
600 | return -EIO; | |
601 | break; | |
602 | case V4L2_CID_GAIN: | |
a3a4ac14 | 603 | qctrl = &mt9t031_controls[MT9T031_CTRL_GAIN]; |
4e96fd08 GL |
604 | if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum) |
605 | return -EINVAL; | |
606 | /* See Datasheet Table 7, Gain settings. */ | |
607 | if (ctrl->value <= qctrl->default_value) { | |
608 | /* Pack it into 0..1 step 0.125, register values 0..8 */ | |
609 | unsigned long range = qctrl->default_value - qctrl->minimum; | |
610 | data = ((ctrl->value - qctrl->minimum) * 8 + range / 2) / range; | |
611 | ||
85f8be68 | 612 | dev_dbg(&client->dev, "Setting gain %d\n", data); |
9538e1c2 | 613 | data = reg_write(client, MT9T031_GLOBAL_GAIN, data); |
4e96fd08 GL |
614 | if (data < 0) |
615 | return -EIO; | |
616 | } else { | |
70e1d353 | 617 | /* Pack it into 1.125..128 variable step, register values 9..0x7860 */ |
4e96fd08 GL |
618 | /* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */ |
619 | unsigned long range = qctrl->maximum - qctrl->default_value - 1; | |
70e1d353 | 620 | /* calculated gain: map 65..127 to 9..1024 step 0.125 */ |
4e96fd08 | 621 | unsigned long gain = ((ctrl->value - qctrl->default_value - 1) * |
70e1d353 | 622 | 1015 + range / 2) / range + 9; |
4e96fd08 | 623 | |
70e1d353 | 624 | if (gain <= 32) /* calculated gain 9..32 -> 9..32 */ |
4e96fd08 | 625 | data = gain; |
70e1d353 | 626 | else if (gain <= 64) /* calculated gain 33..64 -> 0x51..0x60 */ |
4e96fd08 GL |
627 | data = ((gain - 32) * 16 + 16) / 32 + 80; |
628 | else | |
70e1d353 GL |
629 | /* calculated gain 65..1024 -> (1..120) << 8 + 0x60 */ |
630 | data = (((gain - 64 + 7) * 32) & 0xff00) | 0x60; | |
4e96fd08 | 631 | |
85f8be68 | 632 | dev_dbg(&client->dev, "Set gain from 0x%x to 0x%x\n", |
9538e1c2 GL |
633 | reg_read(client, MT9T031_GLOBAL_GAIN), data); |
634 | data = reg_write(client, MT9T031_GLOBAL_GAIN, data); | |
4e96fd08 GL |
635 | if (data < 0) |
636 | return -EIO; | |
637 | } | |
638 | ||
639 | /* Success */ | |
96c75399 | 640 | mt9t031->gain = ctrl->value; |
4e96fd08 GL |
641 | break; |
642 | case V4L2_CID_EXPOSURE: | |
a3a4ac14 | 643 | qctrl = &mt9t031_controls[MT9T031_CTRL_EXPOSURE]; |
4e96fd08 GL |
644 | /* mt9t031 has maximum == default */ |
645 | if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum) | |
646 | return -EINVAL; | |
647 | else { | |
648 | const unsigned long range = qctrl->maximum - qctrl->minimum; | |
649 | const u32 shutter = ((ctrl->value - qctrl->minimum) * 1048 + | |
650 | range / 2) / range + 1; | |
651 | u32 old; | |
652 | ||
9538e1c2 | 653 | get_shutter(client, &old); |
85f8be68 | 654 | dev_dbg(&client->dev, "Set shutter from %u to %u\n", |
4e96fd08 | 655 | old, shutter); |
9538e1c2 | 656 | if (set_shutter(client, shutter) < 0) |
4e96fd08 | 657 | return -EIO; |
96c75399 | 658 | mt9t031->exposure = ctrl->value; |
4e96fd08 GL |
659 | mt9t031->autoexposure = 0; |
660 | } | |
661 | break; | |
662 | case V4L2_CID_EXPOSURE_AUTO: | |
663 | if (ctrl->value) { | |
664 | const u16 vblank = MT9T031_VERTICAL_BLANK; | |
665 | const u32 shutter_max = MT9T031_MAX_HEIGHT + vblank; | |
96c75399 | 666 | unsigned int total_h = mt9t031->rect.height + |
32536108 | 667 | mt9t031->y_skip_top + vblank; |
96c75399 GL |
668 | |
669 | if (set_shutter(client, total_h) < 0) | |
4e96fd08 | 670 | return -EIO; |
a3a4ac14 | 671 | qctrl = &mt9t031_controls[MT9T031_CTRL_EXPOSURE]; |
96c75399 GL |
672 | mt9t031->exposure = (shutter_max / 2 + (total_h - 1) * |
673 | (qctrl->maximum - qctrl->minimum)) / | |
4e96fd08 GL |
674 | shutter_max + qctrl->minimum; |
675 | mt9t031->autoexposure = 1; | |
676 | } else | |
677 | mt9t031->autoexposure = 0; | |
678 | break; | |
a3a4ac14 GL |
679 | default: |
680 | return -EINVAL; | |
4e96fd08 GL |
681 | } |
682 | return 0; | |
683 | } | |
684 | ||
535653b1 VL |
685 | /* |
686 | * Power Management: | |
687 | * This function does nothing for now but must be present for pm to work | |
688 | */ | |
689 | static int mt9t031_runtime_suspend(struct device *dev) | |
690 | { | |
691 | return 0; | |
692 | } | |
693 | ||
694 | /* | |
695 | * Power Management: | |
696 | * COLUMN_ADDRESS_MODE and ROW_ADDRESS_MODE are not rewritten if unchanged | |
697 | * they are however changed at reset if the platform hook is present | |
698 | * thus we rewrite them with the values stored by the driver | |
699 | */ | |
700 | static int mt9t031_runtime_resume(struct device *dev) | |
701 | { | |
702 | struct video_device *vdev = to_video_device(dev); | |
703 | struct soc_camera_device *icd = container_of(vdev->parent, | |
704 | struct soc_camera_device, dev); | |
705 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
c4ce6d14 | 706 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
535653b1 VL |
707 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
708 | ||
709 | int ret; | |
710 | u16 xbin, ybin; | |
711 | ||
712 | xbin = min(mt9t031->xskip, (u16)3); | |
713 | ybin = min(mt9t031->yskip, (u16)3); | |
714 | ||
715 | ret = reg_write(client, MT9T031_COLUMN_ADDRESS_MODE, | |
716 | ((xbin - 1) << 4) | (mt9t031->xskip - 1)); | |
717 | if (ret < 0) | |
718 | return ret; | |
719 | ||
720 | ret = reg_write(client, MT9T031_ROW_ADDRESS_MODE, | |
721 | ((ybin - 1) << 4) | (mt9t031->yskip - 1)); | |
722 | if (ret < 0) | |
723 | return ret; | |
724 | ||
725 | return 0; | |
726 | } | |
727 | ||
728 | static struct dev_pm_ops mt9t031_dev_pm_ops = { | |
729 | .runtime_suspend = mt9t031_runtime_suspend, | |
730 | .runtime_resume = mt9t031_runtime_resume, | |
731 | }; | |
732 | ||
733 | static struct device_type mt9t031_dev_type = { | |
734 | .name = "MT9T031", | |
735 | .pm = &mt9t031_dev_pm_ops, | |
736 | }; | |
737 | ||
5d28d525 GL |
738 | /* |
739 | * Interface active, can use i2c. If it fails, it can indeed mean, that | |
740 | * this wasn't our capture interface, so, we wait for the right one | |
741 | */ | |
979ea1dd | 742 | static int mt9t031_video_probe(struct i2c_client *client) |
4e96fd08 | 743 | { |
979ea1dd | 744 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
535653b1 | 745 | struct video_device *vdev = soc_camera_i2c_to_vdev(client); |
4e96fd08 | 746 | s32 data; |
a4c56fd8 | 747 | int ret; |
4e96fd08 | 748 | |
4e96fd08 | 749 | /* Enable the chip */ |
9538e1c2 | 750 | data = reg_write(client, MT9T031_CHIP_ENABLE, 1); |
85f8be68 | 751 | dev_dbg(&client->dev, "write: %d\n", data); |
4e96fd08 GL |
752 | |
753 | /* Read out the chip version register */ | |
9538e1c2 | 754 | data = reg_read(client, MT9T031_CHIP_VERSION); |
4e96fd08 GL |
755 | |
756 | switch (data) { | |
757 | case 0x1621: | |
758 | mt9t031->model = V4L2_IDENT_MT9T031; | |
4e96fd08 GL |
759 | break; |
760 | default: | |
85f8be68 | 761 | dev_err(&client->dev, |
4e96fd08 | 762 | "No MT9T031 chip detected, register read %x\n", data); |
40e2e092 | 763 | return -ENODEV; |
4e96fd08 GL |
764 | } |
765 | ||
85f8be68 | 766 | dev_info(&client->dev, "Detected a MT9T031 chip ID %x\n", data); |
4e96fd08 | 767 | |
a4c56fd8 GL |
768 | ret = mt9t031_idle(client); |
769 | if (ret < 0) | |
770 | dev_err(&client->dev, "Failed to initialise the camera\n"); | |
535653b1 VL |
771 | else |
772 | vdev->dev.type = &mt9t031_dev_type; | |
a4c56fd8 | 773 | |
96c75399 GL |
774 | /* mt9t031_idle() has reset the chip to default. */ |
775 | mt9t031->exposure = 255; | |
776 | mt9t031->gain = 64; | |
777 | ||
a4c56fd8 | 778 | return ret; |
4e96fd08 GL |
779 | } |
780 | ||
32536108 GL |
781 | static int mt9t031_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines) |
782 | { | |
c4ce6d14 | 783 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
32536108 GL |
784 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
785 | ||
786 | *lines = mt9t031->y_skip_top; | |
787 | ||
788 | return 0; | |
789 | } | |
790 | ||
979ea1dd GL |
791 | static struct v4l2_subdev_core_ops mt9t031_subdev_core_ops = { |
792 | .g_ctrl = mt9t031_g_ctrl, | |
793 | .s_ctrl = mt9t031_s_ctrl, | |
794 | .g_chip_ident = mt9t031_g_chip_ident, | |
795 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
796 | .g_register = mt9t031_g_register, | |
797 | .s_register = mt9t031_s_register, | |
798 | #endif | |
799 | }; | |
800 | ||
3805f201 | 801 | static int mt9t031_enum_fmt(struct v4l2_subdev *sd, unsigned int index, |
760697be GL |
802 | enum v4l2_mbus_pixelcode *code) |
803 | { | |
804 | if (index) | |
805 | return -EINVAL; | |
806 | ||
807 | *code = V4L2_MBUS_FMT_SBGGR10_1X10; | |
808 | return 0; | |
809 | } | |
810 | ||
979ea1dd GL |
811 | static struct v4l2_subdev_video_ops mt9t031_subdev_video_ops = { |
812 | .s_stream = mt9t031_s_stream, | |
760697be GL |
813 | .s_mbus_fmt = mt9t031_s_fmt, |
814 | .g_mbus_fmt = mt9t031_g_fmt, | |
815 | .try_mbus_fmt = mt9t031_try_fmt, | |
08590b96 | 816 | .s_crop = mt9t031_s_crop, |
6a6c8786 GL |
817 | .g_crop = mt9t031_g_crop, |
818 | .cropcap = mt9t031_cropcap, | |
760697be | 819 | .enum_mbus_fmt = mt9t031_enum_fmt, |
979ea1dd GL |
820 | }; |
821 | ||
32536108 GL |
822 | static struct v4l2_subdev_sensor_ops mt9t031_subdev_sensor_ops = { |
823 | .g_skip_top_lines = mt9t031_g_skip_top_lines, | |
824 | }; | |
825 | ||
979ea1dd GL |
826 | static struct v4l2_subdev_ops mt9t031_subdev_ops = { |
827 | .core = &mt9t031_subdev_core_ops, | |
828 | .video = &mt9t031_subdev_video_ops, | |
32536108 | 829 | .sensor = &mt9t031_subdev_sensor_ops, |
979ea1dd GL |
830 | }; |
831 | ||
4e96fd08 GL |
832 | static int mt9t031_probe(struct i2c_client *client, |
833 | const struct i2c_device_id *did) | |
834 | { | |
835 | struct mt9t031 *mt9t031; | |
40e2e092 | 836 | struct soc_camera_device *icd = client->dev.platform_data; |
4e96fd08 | 837 | struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); |
4e96fd08 GL |
838 | int ret; |
839 | ||
a3a4ac14 GL |
840 | if (icd) { |
841 | struct soc_camera_link *icl = to_soc_camera_link(icd); | |
842 | if (!icl) { | |
843 | dev_err(&client->dev, "MT9T031 driver needs platform data\n"); | |
844 | return -EINVAL; | |
845 | } | |
40e2e092 | 846 | |
a3a4ac14 | 847 | icd->ops = &mt9t031_ops; |
4e96fd08 GL |
848 | } |
849 | ||
850 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) { | |
851 | dev_warn(&adapter->dev, | |
852 | "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n"); | |
853 | return -EIO; | |
854 | } | |
855 | ||
856 | mt9t031 = kzalloc(sizeof(struct mt9t031), GFP_KERNEL); | |
857 | if (!mt9t031) | |
858 | return -ENOMEM; | |
859 | ||
979ea1dd | 860 | v4l2_i2c_subdev_init(&mt9t031->subdev, client, &mt9t031_subdev_ops); |
4e96fd08 | 861 | |
32536108 | 862 | mt9t031->y_skip_top = 0; |
6a6c8786 GL |
863 | mt9t031->rect.left = MT9T031_COLUMN_SKIP; |
864 | mt9t031->rect.top = MT9T031_ROW_SKIP; | |
865 | mt9t031->rect.width = MT9T031_MAX_WIDTH; | |
866 | mt9t031->rect.height = MT9T031_MAX_HEIGHT; | |
867 | ||
5d28d525 GL |
868 | /* |
869 | * Simulated autoexposure. If enabled, we calculate shutter width | |
870 | * ourselves in the driver based on vertical blanking and frame width | |
871 | */ | |
4e96fd08 GL |
872 | mt9t031->autoexposure = 1; |
873 | ||
874 | mt9t031->xskip = 1; | |
875 | mt9t031->yskip = 1; | |
876 | ||
979ea1dd GL |
877 | mt9t031_idle(client); |
878 | ||
879 | ret = mt9t031_video_probe(client); | |
880 | ||
881 | mt9t031_disable(client); | |
882 | ||
40e2e092 | 883 | if (ret) { |
a3a4ac14 GL |
884 | if (icd) |
885 | icd->ops = NULL; | |
40e2e092 GL |
886 | kfree(mt9t031); |
887 | } | |
4e96fd08 | 888 | |
4e96fd08 GL |
889 | return ret; |
890 | } | |
891 | ||
892 | static int mt9t031_remove(struct i2c_client *client) | |
893 | { | |
979ea1dd | 894 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
40e2e092 | 895 | struct soc_camera_device *icd = client->dev.platform_data; |
4e96fd08 | 896 | |
a3a4ac14 GL |
897 | if (icd) |
898 | icd->ops = NULL; | |
4e96fd08 GL |
899 | kfree(mt9t031); |
900 | ||
901 | return 0; | |
902 | } | |
903 | ||
904 | static const struct i2c_device_id mt9t031_id[] = { | |
905 | { "mt9t031", 0 }, | |
906 | { } | |
907 | }; | |
908 | MODULE_DEVICE_TABLE(i2c, mt9t031_id); | |
909 | ||
910 | static struct i2c_driver mt9t031_i2c_driver = { | |
911 | .driver = { | |
912 | .name = "mt9t031", | |
913 | }, | |
914 | .probe = mt9t031_probe, | |
915 | .remove = mt9t031_remove, | |
916 | .id_table = mt9t031_id, | |
917 | }; | |
918 | ||
919 | static int __init mt9t031_mod_init(void) | |
920 | { | |
921 | return i2c_add_driver(&mt9t031_i2c_driver); | |
922 | } | |
923 | ||
924 | static void __exit mt9t031_mod_exit(void) | |
925 | { | |
926 | i2c_del_driver(&mt9t031_i2c_driver); | |
927 | } | |
928 | ||
929 | module_init(mt9t031_mod_init); | |
930 | module_exit(mt9t031_mod_exit); | |
931 | ||
932 | MODULE_DESCRIPTION("Micron MT9T031 Camera driver"); | |
933 | MODULE_AUTHOR("Guennadi Liakhovetski <lg@denx.de>"); | |
934 | MODULE_LICENSE("GPL v2"); |