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 | ||
11 | #include <linux/videodev2.h> | |
12 | #include <linux/slab.h> | |
13 | #include <linux/i2c.h> | |
14 | #include <linux/log2.h> | |
15 | ||
979ea1dd | 16 | #include <media/v4l2-subdev.h> |
4e96fd08 GL |
17 | #include <media/v4l2-chip-ident.h> |
18 | #include <media/soc_camera.h> | |
19 | ||
5d28d525 GL |
20 | /* |
21 | * mt9t031 i2c address 0x5d | |
979ea1dd | 22 | * The platform has to define i2c_board_info and link to it from |
5d28d525 GL |
23 | * struct soc_camera_link |
24 | */ | |
4e96fd08 GL |
25 | |
26 | /* mt9t031 selected register addresses */ | |
27 | #define MT9T031_CHIP_VERSION 0x00 | |
28 | #define MT9T031_ROW_START 0x01 | |
29 | #define MT9T031_COLUMN_START 0x02 | |
30 | #define MT9T031_WINDOW_HEIGHT 0x03 | |
31 | #define MT9T031_WINDOW_WIDTH 0x04 | |
32 | #define MT9T031_HORIZONTAL_BLANKING 0x05 | |
33 | #define MT9T031_VERTICAL_BLANKING 0x06 | |
34 | #define MT9T031_OUTPUT_CONTROL 0x07 | |
35 | #define MT9T031_SHUTTER_WIDTH_UPPER 0x08 | |
36 | #define MT9T031_SHUTTER_WIDTH 0x09 | |
37 | #define MT9T031_PIXEL_CLOCK_CONTROL 0x0a | |
38 | #define MT9T031_FRAME_RESTART 0x0b | |
39 | #define MT9T031_SHUTTER_DELAY 0x0c | |
40 | #define MT9T031_RESET 0x0d | |
41 | #define MT9T031_READ_MODE_1 0x1e | |
42 | #define MT9T031_READ_MODE_2 0x20 | |
43 | #define MT9T031_READ_MODE_3 0x21 | |
44 | #define MT9T031_ROW_ADDRESS_MODE 0x22 | |
45 | #define MT9T031_COLUMN_ADDRESS_MODE 0x23 | |
46 | #define MT9T031_GLOBAL_GAIN 0x35 | |
47 | #define MT9T031_CHIP_ENABLE 0xF8 | |
48 | ||
49 | #define MT9T031_MAX_HEIGHT 1536 | |
50 | #define MT9T031_MAX_WIDTH 2048 | |
51 | #define MT9T031_MIN_HEIGHT 2 | |
6a6c8786 | 52 | #define MT9T031_MIN_WIDTH 18 |
4e96fd08 GL |
53 | #define MT9T031_HORIZONTAL_BLANK 142 |
54 | #define MT9T031_VERTICAL_BLANK 25 | |
55 | #define MT9T031_COLUMN_SKIP 32 | |
56 | #define MT9T031_ROW_SKIP 20 | |
57 | ||
58 | #define MT9T031_BUS_PARAM (SOCAM_PCLK_SAMPLE_RISING | \ | |
59 | SOCAM_PCLK_SAMPLE_FALLING | SOCAM_HSYNC_ACTIVE_HIGH | \ | |
60 | SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_DATA_ACTIVE_HIGH | \ | |
61 | SOCAM_MASTER | SOCAM_DATAWIDTH_10) | |
62 | ||
4e96fd08 | 63 | struct mt9t031 { |
979ea1dd | 64 | struct v4l2_subdev subdev; |
6a6c8786 | 65 | struct v4l2_rect rect; /* Sensor window */ |
4e96fd08 | 66 | int model; /* V4L2_IDENT_MT9T031* codes from v4l2-chip-ident.h */ |
4e96fd08 GL |
67 | u16 xskip; |
68 | u16 yskip; | |
96c75399 | 69 | unsigned int gain; |
32536108 | 70 | unsigned short y_skip_top; /* Lines to skip at the top */ |
96c75399 | 71 | unsigned int exposure; |
6a6c8786 | 72 | unsigned char autoexposure; |
4e96fd08 GL |
73 | }; |
74 | ||
979ea1dd GL |
75 | static struct mt9t031 *to_mt9t031(const struct i2c_client *client) |
76 | { | |
77 | return container_of(i2c_get_clientdata(client), struct mt9t031, subdev); | |
78 | } | |
79 | ||
9538e1c2 | 80 | static int reg_read(struct i2c_client *client, const u8 reg) |
4e96fd08 | 81 | { |
4e96fd08 GL |
82 | s32 data = i2c_smbus_read_word_data(client, reg); |
83 | return data < 0 ? data : swab16(data); | |
84 | } | |
85 | ||
9538e1c2 | 86 | static int reg_write(struct i2c_client *client, const u8 reg, |
4e96fd08 GL |
87 | const u16 data) |
88 | { | |
9538e1c2 | 89 | return i2c_smbus_write_word_data(client, reg, swab16(data)); |
4e96fd08 GL |
90 | } |
91 | ||
9538e1c2 | 92 | static int reg_set(struct i2c_client *client, const u8 reg, |
4e96fd08 GL |
93 | const u16 data) |
94 | { | |
95 | int ret; | |
96 | ||
9538e1c2 | 97 | ret = reg_read(client, reg); |
4e96fd08 GL |
98 | if (ret < 0) |
99 | return ret; | |
9538e1c2 | 100 | return reg_write(client, reg, ret | data); |
4e96fd08 GL |
101 | } |
102 | ||
9538e1c2 | 103 | static int reg_clear(struct i2c_client *client, const u8 reg, |
4e96fd08 GL |
104 | const u16 data) |
105 | { | |
106 | int ret; | |
107 | ||
9538e1c2 | 108 | ret = reg_read(client, reg); |
4e96fd08 GL |
109 | if (ret < 0) |
110 | return ret; | |
9538e1c2 | 111 | return reg_write(client, reg, ret & ~data); |
4e96fd08 GL |
112 | } |
113 | ||
9538e1c2 | 114 | static int set_shutter(struct i2c_client *client, const u32 data) |
4e96fd08 GL |
115 | { |
116 | int ret; | |
117 | ||
9538e1c2 | 118 | ret = reg_write(client, MT9T031_SHUTTER_WIDTH_UPPER, data >> 16); |
4e96fd08 GL |
119 | |
120 | if (ret >= 0) | |
9538e1c2 | 121 | ret = reg_write(client, MT9T031_SHUTTER_WIDTH, data & 0xffff); |
4e96fd08 GL |
122 | |
123 | return ret; | |
124 | } | |
125 | ||
9538e1c2 | 126 | static int get_shutter(struct i2c_client *client, u32 *data) |
4e96fd08 GL |
127 | { |
128 | int ret; | |
129 | ||
9538e1c2 | 130 | ret = reg_read(client, MT9T031_SHUTTER_WIDTH_UPPER); |
4e96fd08 GL |
131 | *data = ret << 16; |
132 | ||
133 | if (ret >= 0) | |
9538e1c2 | 134 | ret = reg_read(client, MT9T031_SHUTTER_WIDTH); |
4e96fd08 GL |
135 | *data |= ret & 0xffff; |
136 | ||
137 | return ret < 0 ? ret : 0; | |
138 | } | |
139 | ||
979ea1dd | 140 | static int mt9t031_idle(struct i2c_client *client) |
4e96fd08 GL |
141 | { |
142 | int ret; | |
143 | ||
144 | /* Disable chip output, synchronous option update */ | |
9538e1c2 | 145 | ret = reg_write(client, MT9T031_RESET, 1); |
4e96fd08 | 146 | if (ret >= 0) |
9538e1c2 | 147 | ret = reg_write(client, MT9T031_RESET, 0); |
4e96fd08 | 148 | if (ret >= 0) |
9538e1c2 | 149 | ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 2); |
4e96fd08 GL |
150 | |
151 | return ret >= 0 ? 0 : -EIO; | |
152 | } | |
153 | ||
979ea1dd | 154 | static int mt9t031_disable(struct i2c_client *client) |
4e96fd08 GL |
155 | { |
156 | /* Disable the chip */ | |
9538e1c2 | 157 | reg_clear(client, MT9T031_OUTPUT_CONTROL, 2); |
f9826514 | 158 | |
4e96fd08 GL |
159 | return 0; |
160 | } | |
161 | ||
979ea1dd GL |
162 | static int mt9t031_s_stream(struct v4l2_subdev *sd, int enable) |
163 | { | |
164 | struct i2c_client *client = sd->priv; | |
165 | int ret; | |
166 | ||
167 | if (enable) | |
168 | /* Switch to master "normal" mode */ | |
169 | ret = reg_set(client, MT9T031_OUTPUT_CONTROL, 2); | |
170 | else | |
171 | /* Stop sensor readout */ | |
172 | ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 2); | |
173 | ||
174 | if (ret < 0) | |
4e96fd08 | 175 | return -EIO; |
979ea1dd | 176 | |
4e96fd08 GL |
177 | return 0; |
178 | } | |
179 | ||
180 | static int mt9t031_set_bus_param(struct soc_camera_device *icd, | |
181 | unsigned long flags) | |
182 | { | |
40e2e092 | 183 | struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd)); |
9538e1c2 | 184 | |
4e96fd08 GL |
185 | /* The caller should have queried our parameters, check anyway */ |
186 | if (flags & ~MT9T031_BUS_PARAM) | |
187 | return -EINVAL; | |
188 | ||
189 | if (flags & SOCAM_PCLK_SAMPLE_FALLING) | |
9538e1c2 | 190 | reg_clear(client, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000); |
c98afbfc | 191 | else |
9538e1c2 | 192 | reg_set(client, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000); |
4e96fd08 GL |
193 | |
194 | return 0; | |
195 | } | |
196 | ||
197 | static unsigned long mt9t031_query_bus_param(struct soc_camera_device *icd) | |
198 | { | |
40e2e092 | 199 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
4e96fd08 GL |
200 | |
201 | return soc_camera_apply_sensor_flags(icl, MT9T031_BUS_PARAM); | |
202 | } | |
203 | ||
a3a4ac14 GL |
204 | enum { |
205 | MT9T031_CTRL_VFLIP, | |
206 | MT9T031_CTRL_HFLIP, | |
207 | MT9T031_CTRL_GAIN, | |
208 | MT9T031_CTRL_EXPOSURE, | |
209 | MT9T031_CTRL_EXPOSURE_AUTO, | |
210 | }; | |
211 | ||
212 | static const struct v4l2_queryctrl mt9t031_controls[] = { | |
213 | [MT9T031_CTRL_VFLIP] = { | |
214 | .id = V4L2_CID_VFLIP, | |
215 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
216 | .name = "Flip Vertically", | |
217 | .minimum = 0, | |
218 | .maximum = 1, | |
219 | .step = 1, | |
220 | .default_value = 0, | |
221 | }, | |
222 | [MT9T031_CTRL_HFLIP] = { | |
223 | .id = V4L2_CID_HFLIP, | |
224 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
225 | .name = "Flip Horizontally", | |
226 | .minimum = 0, | |
227 | .maximum = 1, | |
228 | .step = 1, | |
229 | .default_value = 0, | |
230 | }, | |
231 | [MT9T031_CTRL_GAIN] = { | |
232 | .id = V4L2_CID_GAIN, | |
233 | .type = V4L2_CTRL_TYPE_INTEGER, | |
234 | .name = "Gain", | |
235 | .minimum = 0, | |
236 | .maximum = 127, | |
237 | .step = 1, | |
238 | .default_value = 64, | |
239 | .flags = V4L2_CTRL_FLAG_SLIDER, | |
240 | }, | |
241 | [MT9T031_CTRL_EXPOSURE] = { | |
242 | .id = V4L2_CID_EXPOSURE, | |
243 | .type = V4L2_CTRL_TYPE_INTEGER, | |
244 | .name = "Exposure", | |
245 | .minimum = 1, | |
246 | .maximum = 255, | |
247 | .step = 1, | |
248 | .default_value = 255, | |
249 | .flags = V4L2_CTRL_FLAG_SLIDER, | |
250 | }, | |
251 | [MT9T031_CTRL_EXPOSURE_AUTO] = { | |
252 | .id = V4L2_CID_EXPOSURE_AUTO, | |
253 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
254 | .name = "Automatic Exposure", | |
255 | .minimum = 0, | |
256 | .maximum = 1, | |
257 | .step = 1, | |
258 | .default_value = 1, | |
259 | } | |
260 | }; | |
261 | ||
262 | static struct soc_camera_ops mt9t031_ops = { | |
263 | .set_bus_param = mt9t031_set_bus_param, | |
264 | .query_bus_param = mt9t031_query_bus_param, | |
265 | .controls = mt9t031_controls, | |
266 | .num_controls = ARRAY_SIZE(mt9t031_controls), | |
267 | }; | |
268 | ||
6a6c8786 GL |
269 | /* target must be _even_ */ |
270 | static u16 mt9t031_skip(s32 *source, s32 target, s32 max) | |
70e1d353 | 271 | { |
6a6c8786 GL |
272 | unsigned int skip; |
273 | ||
274 | if (*source < target + target / 2) { | |
275 | *source = target; | |
276 | return 1; | |
277 | } | |
278 | ||
279 | skip = min(max, *source + target / 2) / target; | |
280 | if (skip > 8) | |
281 | skip = 8; | |
282 | *source = target * skip; | |
283 | ||
284 | return skip; | |
70e1d353 GL |
285 | } |
286 | ||
6a6c8786 | 287 | /* rect is the sensor rectangle, the caller guarantees parameter validity */ |
a3a4ac14 | 288 | static int mt9t031_set_params(struct i2c_client *client, |
09e231b3 | 289 | struct v4l2_rect *rect, u16 xskip, u16 yskip) |
4e96fd08 | 290 | { |
979ea1dd | 291 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
4e96fd08 | 292 | int ret; |
6a6c8786 | 293 | u16 xbin, ybin; |
4e96fd08 GL |
294 | const u16 hblank = MT9T031_HORIZONTAL_BLANK, |
295 | vblank = MT9T031_VERTICAL_BLANK; | |
4e96fd08 GL |
296 | |
297 | xbin = min(xskip, (u16)3); | |
298 | ybin = min(yskip, (u16)3); | |
299 | ||
6a6c8786 GL |
300 | /* |
301 | * Could just do roundup(rect->left, [xy]bin * 2); but this is cheaper. | |
302 | * There is always a valid suitably aligned value. The worst case is | |
303 | * xbin = 3, width = 2048. Then we will start at 36, the last read out | |
304 | * pixel will be 2083, which is < 2085 - first black pixel. | |
305 | * | |
306 | * MT9T031 datasheet imposes window left border alignment, depending on | |
307 | * the selected xskip. Failing to conform to this requirement produces | |
308 | * dark horizontal stripes in the image. However, even obeying to this | |
309 | * requirement doesn't eliminate the stripes in all configurations. They | |
310 | * appear "locally reproducibly," but can differ between tests under | |
311 | * different lighting conditions. | |
312 | */ | |
4e96fd08 | 313 | switch (xbin) { |
6a6c8786 GL |
314 | case 1: |
315 | rect->left &= ~1; | |
4e96fd08 | 316 | break; |
4e96fd08 | 317 | case 2: |
6a6c8786 | 318 | rect->left &= ~3; |
4e96fd08 GL |
319 | break; |
320 | case 3: | |
6a6c8786 GL |
321 | rect->left = rect->left > roundup(MT9T031_COLUMN_SKIP, 6) ? |
322 | (rect->left / 6) * 6 : roundup(MT9T031_COLUMN_SKIP, 6); | |
4e96fd08 GL |
323 | } |
324 | ||
6a6c8786 GL |
325 | rect->top &= ~1; |
326 | ||
327 | dev_dbg(&client->dev, "skip %u:%u, rect %ux%u@%u:%u\n", | |
328 | xskip, yskip, rect->width, rect->height, rect->left, rect->top); | |
329 | ||
70e1d353 | 330 | /* Disable register update, reconfigure atomically */ |
9538e1c2 | 331 | ret = reg_set(client, MT9T031_OUTPUT_CONTROL, 1); |
70e1d353 GL |
332 | if (ret < 0) |
333 | return ret; | |
334 | ||
4e96fd08 | 335 | /* Blanking and start values - default... */ |
9538e1c2 | 336 | ret = reg_write(client, MT9T031_HORIZONTAL_BLANKING, hblank); |
4e96fd08 | 337 | if (ret >= 0) |
9538e1c2 | 338 | ret = reg_write(client, MT9T031_VERTICAL_BLANKING, vblank); |
4e96fd08 | 339 | |
09e231b3 | 340 | if (yskip != mt9t031->yskip || xskip != mt9t031->xskip) { |
4e96fd08 GL |
341 | /* Binning, skipping */ |
342 | if (ret >= 0) | |
9538e1c2 | 343 | ret = reg_write(client, MT9T031_COLUMN_ADDRESS_MODE, |
4e96fd08 GL |
344 | ((xbin - 1) << 4) | (xskip - 1)); |
345 | if (ret >= 0) | |
9538e1c2 | 346 | ret = reg_write(client, MT9T031_ROW_ADDRESS_MODE, |
4e96fd08 GL |
347 | ((ybin - 1) << 4) | (yskip - 1)); |
348 | } | |
6a6c8786 GL |
349 | dev_dbg(&client->dev, "new physical left %u, top %u\n", |
350 | rect->left, rect->top); | |
4e96fd08 | 351 | |
5d28d525 GL |
352 | /* |
353 | * The caller provides a supported format, as guaranteed by | |
354 | * icd->try_fmt_cap(), soc_camera_s_crop() and soc_camera_cropcap() | |
355 | */ | |
4e96fd08 | 356 | if (ret >= 0) |
6a6c8786 | 357 | ret = reg_write(client, MT9T031_COLUMN_START, rect->left); |
4e96fd08 | 358 | if (ret >= 0) |
6a6c8786 | 359 | ret = reg_write(client, MT9T031_ROW_START, rect->top); |
4e96fd08 | 360 | if (ret >= 0) |
6a6c8786 | 361 | ret = reg_write(client, MT9T031_WINDOW_WIDTH, rect->width - 1); |
4e96fd08 | 362 | if (ret >= 0) |
9538e1c2 | 363 | ret = reg_write(client, MT9T031_WINDOW_HEIGHT, |
32536108 | 364 | rect->height + mt9t031->y_skip_top - 1); |
4e96fd08 | 365 | if (ret >= 0 && mt9t031->autoexposure) { |
32536108 | 366 | unsigned int total_h = rect->height + mt9t031->y_skip_top + vblank; |
96c75399 | 367 | ret = set_shutter(client, total_h); |
4e96fd08 GL |
368 | if (ret >= 0) { |
369 | const u32 shutter_max = MT9T031_MAX_HEIGHT + vblank; | |
370 | const struct v4l2_queryctrl *qctrl = | |
a3a4ac14 | 371 | &mt9t031_controls[MT9T031_CTRL_EXPOSURE]; |
96c75399 GL |
372 | mt9t031->exposure = (shutter_max / 2 + (total_h - 1) * |
373 | (qctrl->maximum - qctrl->minimum)) / | |
4e96fd08 GL |
374 | shutter_max + qctrl->minimum; |
375 | } | |
376 | } | |
377 | ||
09e231b3 GL |
378 | /* Re-enable register update, commit all changes */ |
379 | if (ret >= 0) | |
9538e1c2 | 380 | ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 1); |
09e231b3 | 381 | |
6a6c8786 GL |
382 | if (ret >= 0) { |
383 | mt9t031->rect = *rect; | |
384 | mt9t031->xskip = xskip; | |
385 | mt9t031->yskip = yskip; | |
386 | } | |
387 | ||
09e231b3 GL |
388 | return ret < 0 ? ret : 0; |
389 | } | |
390 | ||
08590b96 | 391 | static int mt9t031_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) |
09e231b3 | 392 | { |
6a6c8786 | 393 | struct v4l2_rect rect = a->c; |
08590b96 | 394 | struct i2c_client *client = sd->priv; |
979ea1dd | 395 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
09e231b3 | 396 | |
6a6c8786 GL |
397 | rect.width = ALIGN(rect.width, 2); |
398 | rect.height = ALIGN(rect.height, 2); | |
399 | ||
400 | soc_camera_limit_side(&rect.left, &rect.width, | |
401 | MT9T031_COLUMN_SKIP, MT9T031_MIN_WIDTH, MT9T031_MAX_WIDTH); | |
402 | ||
403 | soc_camera_limit_side(&rect.top, &rect.height, | |
404 | MT9T031_ROW_SKIP, MT9T031_MIN_HEIGHT, MT9T031_MAX_HEIGHT); | |
405 | ||
a3a4ac14 | 406 | return mt9t031_set_params(client, &rect, mt9t031->xskip, mt9t031->yskip); |
6a6c8786 GL |
407 | } |
408 | ||
409 | static int mt9t031_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) | |
410 | { | |
411 | struct i2c_client *client = sd->priv; | |
412 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
413 | ||
414 | a->c = mt9t031->rect; | |
415 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
e330919a | 416 | |
6a6c8786 GL |
417 | return 0; |
418 | } | |
419 | ||
420 | static int mt9t031_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a) | |
421 | { | |
422 | a->bounds.left = MT9T031_COLUMN_SKIP; | |
423 | a->bounds.top = MT9T031_ROW_SKIP; | |
424 | a->bounds.width = MT9T031_MAX_WIDTH; | |
425 | a->bounds.height = MT9T031_MAX_HEIGHT; | |
426 | a->defrect = a->bounds; | |
427 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
428 | a->pixelaspect.numerator = 1; | |
429 | a->pixelaspect.denominator = 1; | |
e330919a | 430 | |
6a6c8786 GL |
431 | return 0; |
432 | } | |
433 | ||
760697be GL |
434 | static int mt9t031_g_fmt(struct v4l2_subdev *sd, |
435 | struct v4l2_mbus_framefmt *mf) | |
6a6c8786 GL |
436 | { |
437 | struct i2c_client *client = sd->priv; | |
438 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
6a6c8786 | 439 | |
760697be GL |
440 | mf->width = mt9t031->rect.width / mt9t031->xskip; |
441 | mf->height = mt9t031->rect.height / mt9t031->yskip; | |
442 | mf->code = V4L2_MBUS_FMT_SBGGR10_1X10; | |
443 | mf->colorspace = V4L2_COLORSPACE_SRGB; | |
444 | mf->field = V4L2_FIELD_NONE; | |
6a6c8786 GL |
445 | |
446 | return 0; | |
09e231b3 GL |
447 | } |
448 | ||
760697be GL |
449 | static int mt9t031_s_fmt(struct v4l2_subdev *sd, |
450 | struct v4l2_mbus_framefmt *mf) | |
09e231b3 | 451 | { |
979ea1dd GL |
452 | struct i2c_client *client = sd->priv; |
453 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
09e231b3 | 454 | u16 xskip, yskip; |
6a6c8786 | 455 | struct v4l2_rect rect = mt9t031->rect; |
09e231b3 GL |
456 | |
457 | /* | |
6a6c8786 GL |
458 | * try_fmt has put width and height within limits. |
459 | * S_FMT: use binning and skipping for scaling | |
09e231b3 | 460 | */ |
760697be GL |
461 | xskip = mt9t031_skip(&rect.width, mf->width, MT9T031_MAX_WIDTH); |
462 | yskip = mt9t031_skip(&rect.height, mf->height, MT9T031_MAX_HEIGHT); | |
463 | ||
464 | mf->code = V4L2_MBUS_FMT_SBGGR10_1X10; | |
465 | mf->colorspace = V4L2_COLORSPACE_SRGB; | |
4e96fd08 | 466 | |
6a6c8786 | 467 | /* mt9t031_set_params() doesn't change width and height */ |
a3a4ac14 | 468 | return mt9t031_set_params(client, &rect, xskip, yskip); |
4e96fd08 GL |
469 | } |
470 | ||
6a6c8786 GL |
471 | /* |
472 | * If a user window larger than sensor window is requested, we'll increase the | |
473 | * sensor window. | |
474 | */ | |
760697be GL |
475 | static int mt9t031_try_fmt(struct v4l2_subdev *sd, |
476 | struct v4l2_mbus_framefmt *mf) | |
4e96fd08 | 477 | { |
653dc59b | 478 | v4l_bound_align_image( |
760697be GL |
479 | &mf->width, MT9T031_MIN_WIDTH, MT9T031_MAX_WIDTH, 1, |
480 | &mf->height, MT9T031_MIN_HEIGHT, MT9T031_MAX_HEIGHT, 1, 0); | |
481 | ||
482 | mf->code = V4L2_MBUS_FMT_SBGGR10_1X10; | |
483 | mf->colorspace = V4L2_COLORSPACE_SRGB; | |
4e96fd08 GL |
484 | |
485 | return 0; | |
486 | } | |
487 | ||
979ea1dd GL |
488 | static int mt9t031_g_chip_ident(struct v4l2_subdev *sd, |
489 | struct v4l2_dbg_chip_ident *id) | |
4e96fd08 | 490 | { |
979ea1dd GL |
491 | struct i2c_client *client = sd->priv; |
492 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
4e96fd08 | 493 | |
aecde8b5 | 494 | if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR) |
4e96fd08 GL |
495 | return -EINVAL; |
496 | ||
40e2e092 | 497 | if (id->match.addr != client->addr) |
4e96fd08 GL |
498 | return -ENODEV; |
499 | ||
500 | id->ident = mt9t031->model; | |
501 | id->revision = 0; | |
502 | ||
503 | return 0; | |
504 | } | |
505 | ||
506 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
979ea1dd GL |
507 | static int mt9t031_g_register(struct v4l2_subdev *sd, |
508 | struct v4l2_dbg_register *reg) | |
4e96fd08 | 509 | { |
979ea1dd | 510 | struct i2c_client *client = sd->priv; |
4e96fd08 | 511 | |
aecde8b5 | 512 | if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) |
4e96fd08 GL |
513 | return -EINVAL; |
514 | ||
9538e1c2 | 515 | if (reg->match.addr != client->addr) |
4e96fd08 GL |
516 | return -ENODEV; |
517 | ||
9538e1c2 | 518 | reg->val = reg_read(client, reg->reg); |
4e96fd08 GL |
519 | |
520 | if (reg->val > 0xffff) | |
521 | return -EIO; | |
522 | ||
523 | return 0; | |
524 | } | |
525 | ||
979ea1dd GL |
526 | static int mt9t031_s_register(struct v4l2_subdev *sd, |
527 | struct v4l2_dbg_register *reg) | |
4e96fd08 | 528 | { |
979ea1dd | 529 | struct i2c_client *client = sd->priv; |
4e96fd08 | 530 | |
aecde8b5 | 531 | if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) |
4e96fd08 GL |
532 | return -EINVAL; |
533 | ||
9538e1c2 | 534 | if (reg->match.addr != client->addr) |
4e96fd08 GL |
535 | return -ENODEV; |
536 | ||
9538e1c2 | 537 | if (reg_write(client, reg->reg, reg->val) < 0) |
4e96fd08 GL |
538 | return -EIO; |
539 | ||
540 | return 0; | |
541 | } | |
542 | #endif | |
543 | ||
979ea1dd | 544 | static int mt9t031_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
4e96fd08 | 545 | { |
979ea1dd GL |
546 | struct i2c_client *client = sd->priv; |
547 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
4e96fd08 GL |
548 | int data; |
549 | ||
550 | switch (ctrl->id) { | |
551 | case V4L2_CID_VFLIP: | |
9538e1c2 | 552 | data = reg_read(client, MT9T031_READ_MODE_2); |
4e96fd08 GL |
553 | if (data < 0) |
554 | return -EIO; | |
555 | ctrl->value = !!(data & 0x8000); | |
556 | break; | |
557 | case V4L2_CID_HFLIP: | |
9538e1c2 | 558 | data = reg_read(client, MT9T031_READ_MODE_2); |
4e96fd08 GL |
559 | if (data < 0) |
560 | return -EIO; | |
561 | ctrl->value = !!(data & 0x4000); | |
562 | break; | |
563 | case V4L2_CID_EXPOSURE_AUTO: | |
564 | ctrl->value = mt9t031->autoexposure; | |
565 | break; | |
96c75399 GL |
566 | case V4L2_CID_GAIN: |
567 | ctrl->value = mt9t031->gain; | |
568 | break; | |
569 | case V4L2_CID_EXPOSURE: | |
570 | ctrl->value = mt9t031->exposure; | |
571 | break; | |
4e96fd08 GL |
572 | } |
573 | return 0; | |
574 | } | |
575 | ||
979ea1dd | 576 | static int mt9t031_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
4e96fd08 | 577 | { |
979ea1dd GL |
578 | struct i2c_client *client = sd->priv; |
579 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
4e96fd08 GL |
580 | const struct v4l2_queryctrl *qctrl; |
581 | int data; | |
582 | ||
4e96fd08 GL |
583 | switch (ctrl->id) { |
584 | case V4L2_CID_VFLIP: | |
585 | if (ctrl->value) | |
9538e1c2 | 586 | data = reg_set(client, MT9T031_READ_MODE_2, 0x8000); |
4e96fd08 | 587 | else |
9538e1c2 | 588 | data = reg_clear(client, MT9T031_READ_MODE_2, 0x8000); |
4e96fd08 GL |
589 | if (data < 0) |
590 | return -EIO; | |
591 | break; | |
592 | case V4L2_CID_HFLIP: | |
593 | if (ctrl->value) | |
9538e1c2 | 594 | data = reg_set(client, MT9T031_READ_MODE_2, 0x4000); |
4e96fd08 | 595 | else |
9538e1c2 | 596 | data = reg_clear(client, MT9T031_READ_MODE_2, 0x4000); |
4e96fd08 GL |
597 | if (data < 0) |
598 | return -EIO; | |
599 | break; | |
600 | case V4L2_CID_GAIN: | |
a3a4ac14 | 601 | qctrl = &mt9t031_controls[MT9T031_CTRL_GAIN]; |
4e96fd08 GL |
602 | if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum) |
603 | return -EINVAL; | |
604 | /* See Datasheet Table 7, Gain settings. */ | |
605 | if (ctrl->value <= qctrl->default_value) { | |
606 | /* Pack it into 0..1 step 0.125, register values 0..8 */ | |
607 | unsigned long range = qctrl->default_value - qctrl->minimum; | |
608 | data = ((ctrl->value - qctrl->minimum) * 8 + range / 2) / range; | |
609 | ||
85f8be68 | 610 | dev_dbg(&client->dev, "Setting gain %d\n", data); |
9538e1c2 | 611 | data = reg_write(client, MT9T031_GLOBAL_GAIN, data); |
4e96fd08 GL |
612 | if (data < 0) |
613 | return -EIO; | |
614 | } else { | |
70e1d353 | 615 | /* Pack it into 1.125..128 variable step, register values 9..0x7860 */ |
4e96fd08 GL |
616 | /* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */ |
617 | unsigned long range = qctrl->maximum - qctrl->default_value - 1; | |
70e1d353 | 618 | /* calculated gain: map 65..127 to 9..1024 step 0.125 */ |
4e96fd08 | 619 | unsigned long gain = ((ctrl->value - qctrl->default_value - 1) * |
70e1d353 | 620 | 1015 + range / 2) / range + 9; |
4e96fd08 | 621 | |
70e1d353 | 622 | if (gain <= 32) /* calculated gain 9..32 -> 9..32 */ |
4e96fd08 | 623 | data = gain; |
70e1d353 | 624 | else if (gain <= 64) /* calculated gain 33..64 -> 0x51..0x60 */ |
4e96fd08 GL |
625 | data = ((gain - 32) * 16 + 16) / 32 + 80; |
626 | else | |
70e1d353 GL |
627 | /* calculated gain 65..1024 -> (1..120) << 8 + 0x60 */ |
628 | data = (((gain - 64 + 7) * 32) & 0xff00) | 0x60; | |
4e96fd08 | 629 | |
85f8be68 | 630 | dev_dbg(&client->dev, "Set gain from 0x%x to 0x%x\n", |
9538e1c2 GL |
631 | reg_read(client, MT9T031_GLOBAL_GAIN), data); |
632 | data = reg_write(client, MT9T031_GLOBAL_GAIN, data); | |
4e96fd08 GL |
633 | if (data < 0) |
634 | return -EIO; | |
635 | } | |
636 | ||
637 | /* Success */ | |
96c75399 | 638 | mt9t031->gain = ctrl->value; |
4e96fd08 GL |
639 | break; |
640 | case V4L2_CID_EXPOSURE: | |
a3a4ac14 | 641 | qctrl = &mt9t031_controls[MT9T031_CTRL_EXPOSURE]; |
4e96fd08 GL |
642 | /* mt9t031 has maximum == default */ |
643 | if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum) | |
644 | return -EINVAL; | |
645 | else { | |
646 | const unsigned long range = qctrl->maximum - qctrl->minimum; | |
647 | const u32 shutter = ((ctrl->value - qctrl->minimum) * 1048 + | |
648 | range / 2) / range + 1; | |
649 | u32 old; | |
650 | ||
9538e1c2 | 651 | get_shutter(client, &old); |
85f8be68 | 652 | dev_dbg(&client->dev, "Set shutter from %u to %u\n", |
4e96fd08 | 653 | old, shutter); |
9538e1c2 | 654 | if (set_shutter(client, shutter) < 0) |
4e96fd08 | 655 | return -EIO; |
96c75399 | 656 | mt9t031->exposure = ctrl->value; |
4e96fd08 GL |
657 | mt9t031->autoexposure = 0; |
658 | } | |
659 | break; | |
660 | case V4L2_CID_EXPOSURE_AUTO: | |
661 | if (ctrl->value) { | |
662 | const u16 vblank = MT9T031_VERTICAL_BLANK; | |
663 | const u32 shutter_max = MT9T031_MAX_HEIGHT + vblank; | |
96c75399 | 664 | unsigned int total_h = mt9t031->rect.height + |
32536108 | 665 | mt9t031->y_skip_top + vblank; |
96c75399 GL |
666 | |
667 | if (set_shutter(client, total_h) < 0) | |
4e96fd08 | 668 | return -EIO; |
a3a4ac14 | 669 | qctrl = &mt9t031_controls[MT9T031_CTRL_EXPOSURE]; |
96c75399 GL |
670 | mt9t031->exposure = (shutter_max / 2 + (total_h - 1) * |
671 | (qctrl->maximum - qctrl->minimum)) / | |
4e96fd08 GL |
672 | shutter_max + qctrl->minimum; |
673 | mt9t031->autoexposure = 1; | |
674 | } else | |
675 | mt9t031->autoexposure = 0; | |
676 | break; | |
a3a4ac14 GL |
677 | default: |
678 | return -EINVAL; | |
4e96fd08 GL |
679 | } |
680 | return 0; | |
681 | } | |
682 | ||
5d28d525 GL |
683 | /* |
684 | * Interface active, can use i2c. If it fails, it can indeed mean, that | |
685 | * this wasn't our capture interface, so, we wait for the right one | |
686 | */ | |
979ea1dd | 687 | static int mt9t031_video_probe(struct i2c_client *client) |
4e96fd08 | 688 | { |
979ea1dd | 689 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
4e96fd08 | 690 | s32 data; |
a4c56fd8 | 691 | int ret; |
4e96fd08 | 692 | |
4e96fd08 | 693 | /* Enable the chip */ |
9538e1c2 | 694 | data = reg_write(client, MT9T031_CHIP_ENABLE, 1); |
85f8be68 | 695 | dev_dbg(&client->dev, "write: %d\n", data); |
4e96fd08 GL |
696 | |
697 | /* Read out the chip version register */ | |
9538e1c2 | 698 | data = reg_read(client, MT9T031_CHIP_VERSION); |
4e96fd08 GL |
699 | |
700 | switch (data) { | |
701 | case 0x1621: | |
702 | mt9t031->model = V4L2_IDENT_MT9T031; | |
4e96fd08 GL |
703 | break; |
704 | default: | |
85f8be68 | 705 | dev_err(&client->dev, |
4e96fd08 | 706 | "No MT9T031 chip detected, register read %x\n", data); |
40e2e092 | 707 | return -ENODEV; |
4e96fd08 GL |
708 | } |
709 | ||
85f8be68 | 710 | dev_info(&client->dev, "Detected a MT9T031 chip ID %x\n", data); |
4e96fd08 | 711 | |
a4c56fd8 GL |
712 | ret = mt9t031_idle(client); |
713 | if (ret < 0) | |
714 | dev_err(&client->dev, "Failed to initialise the camera\n"); | |
715 | ||
96c75399 GL |
716 | /* mt9t031_idle() has reset the chip to default. */ |
717 | mt9t031->exposure = 255; | |
718 | mt9t031->gain = 64; | |
719 | ||
a4c56fd8 | 720 | return ret; |
4e96fd08 GL |
721 | } |
722 | ||
32536108 GL |
723 | static int mt9t031_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines) |
724 | { | |
725 | struct i2c_client *client = sd->priv; | |
726 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
727 | ||
728 | *lines = mt9t031->y_skip_top; | |
729 | ||
730 | return 0; | |
731 | } | |
732 | ||
979ea1dd GL |
733 | static struct v4l2_subdev_core_ops mt9t031_subdev_core_ops = { |
734 | .g_ctrl = mt9t031_g_ctrl, | |
735 | .s_ctrl = mt9t031_s_ctrl, | |
736 | .g_chip_ident = mt9t031_g_chip_ident, | |
737 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
738 | .g_register = mt9t031_g_register, | |
739 | .s_register = mt9t031_s_register, | |
740 | #endif | |
741 | }; | |
742 | ||
760697be GL |
743 | static int mt9t031_enum_fmt(struct v4l2_subdev *sd, int index, |
744 | enum v4l2_mbus_pixelcode *code) | |
745 | { | |
746 | if (index) | |
747 | return -EINVAL; | |
748 | ||
749 | *code = V4L2_MBUS_FMT_SBGGR10_1X10; | |
750 | return 0; | |
751 | } | |
752 | ||
979ea1dd GL |
753 | static struct v4l2_subdev_video_ops mt9t031_subdev_video_ops = { |
754 | .s_stream = mt9t031_s_stream, | |
760697be GL |
755 | .s_mbus_fmt = mt9t031_s_fmt, |
756 | .g_mbus_fmt = mt9t031_g_fmt, | |
757 | .try_mbus_fmt = mt9t031_try_fmt, | |
08590b96 | 758 | .s_crop = mt9t031_s_crop, |
6a6c8786 GL |
759 | .g_crop = mt9t031_g_crop, |
760 | .cropcap = mt9t031_cropcap, | |
760697be | 761 | .enum_mbus_fmt = mt9t031_enum_fmt, |
979ea1dd GL |
762 | }; |
763 | ||
32536108 GL |
764 | static struct v4l2_subdev_sensor_ops mt9t031_subdev_sensor_ops = { |
765 | .g_skip_top_lines = mt9t031_g_skip_top_lines, | |
766 | }; | |
767 | ||
979ea1dd GL |
768 | static struct v4l2_subdev_ops mt9t031_subdev_ops = { |
769 | .core = &mt9t031_subdev_core_ops, | |
770 | .video = &mt9t031_subdev_video_ops, | |
32536108 | 771 | .sensor = &mt9t031_subdev_sensor_ops, |
979ea1dd GL |
772 | }; |
773 | ||
4e96fd08 GL |
774 | static int mt9t031_probe(struct i2c_client *client, |
775 | const struct i2c_device_id *did) | |
776 | { | |
777 | struct mt9t031 *mt9t031; | |
40e2e092 | 778 | struct soc_camera_device *icd = client->dev.platform_data; |
4e96fd08 | 779 | struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); |
4e96fd08 GL |
780 | int ret; |
781 | ||
a3a4ac14 GL |
782 | if (icd) { |
783 | struct soc_camera_link *icl = to_soc_camera_link(icd); | |
784 | if (!icl) { | |
785 | dev_err(&client->dev, "MT9T031 driver needs platform data\n"); | |
786 | return -EINVAL; | |
787 | } | |
40e2e092 | 788 | |
a3a4ac14 | 789 | icd->ops = &mt9t031_ops; |
4e96fd08 GL |
790 | } |
791 | ||
792 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) { | |
793 | dev_warn(&adapter->dev, | |
794 | "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n"); | |
795 | return -EIO; | |
796 | } | |
797 | ||
798 | mt9t031 = kzalloc(sizeof(struct mt9t031), GFP_KERNEL); | |
799 | if (!mt9t031) | |
800 | return -ENOMEM; | |
801 | ||
979ea1dd | 802 | v4l2_i2c_subdev_init(&mt9t031->subdev, client, &mt9t031_subdev_ops); |
4e96fd08 | 803 | |
32536108 | 804 | mt9t031->y_skip_top = 0; |
6a6c8786 GL |
805 | mt9t031->rect.left = MT9T031_COLUMN_SKIP; |
806 | mt9t031->rect.top = MT9T031_ROW_SKIP; | |
807 | mt9t031->rect.width = MT9T031_MAX_WIDTH; | |
808 | mt9t031->rect.height = MT9T031_MAX_HEIGHT; | |
809 | ||
5d28d525 GL |
810 | /* |
811 | * Simulated autoexposure. If enabled, we calculate shutter width | |
812 | * ourselves in the driver based on vertical blanking and frame width | |
813 | */ | |
4e96fd08 GL |
814 | mt9t031->autoexposure = 1; |
815 | ||
816 | mt9t031->xskip = 1; | |
817 | mt9t031->yskip = 1; | |
818 | ||
979ea1dd GL |
819 | mt9t031_idle(client); |
820 | ||
821 | ret = mt9t031_video_probe(client); | |
822 | ||
823 | mt9t031_disable(client); | |
824 | ||
40e2e092 | 825 | if (ret) { |
a3a4ac14 GL |
826 | if (icd) |
827 | icd->ops = NULL; | |
40e2e092 GL |
828 | i2c_set_clientdata(client, NULL); |
829 | kfree(mt9t031); | |
830 | } | |
4e96fd08 | 831 | |
4e96fd08 GL |
832 | return ret; |
833 | } | |
834 | ||
835 | static int mt9t031_remove(struct i2c_client *client) | |
836 | { | |
979ea1dd | 837 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
40e2e092 | 838 | struct soc_camera_device *icd = client->dev.platform_data; |
4e96fd08 | 839 | |
a3a4ac14 GL |
840 | if (icd) |
841 | icd->ops = NULL; | |
4e96fd08 | 842 | i2c_set_clientdata(client, NULL); |
40e2e092 | 843 | client->driver = NULL; |
4e96fd08 GL |
844 | kfree(mt9t031); |
845 | ||
846 | return 0; | |
847 | } | |
848 | ||
849 | static const struct i2c_device_id mt9t031_id[] = { | |
850 | { "mt9t031", 0 }, | |
851 | { } | |
852 | }; | |
853 | MODULE_DEVICE_TABLE(i2c, mt9t031_id); | |
854 | ||
855 | static struct i2c_driver mt9t031_i2c_driver = { | |
856 | .driver = { | |
857 | .name = "mt9t031", | |
858 | }, | |
859 | .probe = mt9t031_probe, | |
860 | .remove = mt9t031_remove, | |
861 | .id_table = mt9t031_id, | |
862 | }; | |
863 | ||
864 | static int __init mt9t031_mod_init(void) | |
865 | { | |
866 | return i2c_add_driver(&mt9t031_i2c_driver); | |
867 | } | |
868 | ||
869 | static void __exit mt9t031_mod_exit(void) | |
870 | { | |
871 | i2c_del_driver(&mt9t031_i2c_driver); | |
872 | } | |
873 | ||
874 | module_init(mt9t031_mod_init); | |
875 | module_exit(mt9t031_mod_exit); | |
876 | ||
877 | MODULE_DESCRIPTION("Micron MT9T031 Camera driver"); | |
878 | MODULE_AUTHOR("Guennadi Liakhovetski <lg@denx.de>"); | |
879 | MODULE_LICENSE("GPL v2"); |