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 | ||
63 | static const struct soc_camera_data_format mt9t031_colour_formats[] = { | |
64 | { | |
65 | .name = "Bayer (sRGB) 10 bit", | |
66 | .depth = 10, | |
67 | .fourcc = V4L2_PIX_FMT_SGRBG10, | |
68 | .colorspace = V4L2_COLORSPACE_SRGB, | |
69 | } | |
70 | }; | |
71 | ||
72 | struct mt9t031 { | |
979ea1dd | 73 | struct v4l2_subdev subdev; |
6a6c8786 | 74 | struct v4l2_rect rect; /* Sensor window */ |
4e96fd08 | 75 | int model; /* V4L2_IDENT_MT9T031* codes from v4l2-chip-ident.h */ |
4e96fd08 GL |
76 | u16 xskip; |
77 | u16 yskip; | |
96c75399 | 78 | unsigned int gain; |
32536108 | 79 | unsigned short y_skip_top; /* Lines to skip at the top */ |
96c75399 | 80 | unsigned int exposure; |
6a6c8786 | 81 | unsigned char autoexposure; |
4e96fd08 GL |
82 | }; |
83 | ||
979ea1dd GL |
84 | static struct mt9t031 *to_mt9t031(const struct i2c_client *client) |
85 | { | |
86 | return container_of(i2c_get_clientdata(client), struct mt9t031, subdev); | |
87 | } | |
88 | ||
9538e1c2 | 89 | static int reg_read(struct i2c_client *client, const u8 reg) |
4e96fd08 | 90 | { |
4e96fd08 GL |
91 | s32 data = i2c_smbus_read_word_data(client, reg); |
92 | return data < 0 ? data : swab16(data); | |
93 | } | |
94 | ||
9538e1c2 | 95 | static int reg_write(struct i2c_client *client, const u8 reg, |
4e96fd08 GL |
96 | const u16 data) |
97 | { | |
9538e1c2 | 98 | return i2c_smbus_write_word_data(client, reg, swab16(data)); |
4e96fd08 GL |
99 | } |
100 | ||
9538e1c2 | 101 | static int reg_set(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 reg_clear(struct i2c_client *client, const u8 reg, |
4e96fd08 GL |
113 | const u16 data) |
114 | { | |
115 | int ret; | |
116 | ||
9538e1c2 | 117 | ret = reg_read(client, reg); |
4e96fd08 GL |
118 | if (ret < 0) |
119 | return ret; | |
9538e1c2 | 120 | return reg_write(client, reg, ret & ~data); |
4e96fd08 GL |
121 | } |
122 | ||
9538e1c2 | 123 | static int set_shutter(struct i2c_client *client, const u32 data) |
4e96fd08 GL |
124 | { |
125 | int ret; | |
126 | ||
9538e1c2 | 127 | ret = reg_write(client, MT9T031_SHUTTER_WIDTH_UPPER, data >> 16); |
4e96fd08 GL |
128 | |
129 | if (ret >= 0) | |
9538e1c2 | 130 | ret = reg_write(client, MT9T031_SHUTTER_WIDTH, data & 0xffff); |
4e96fd08 GL |
131 | |
132 | return ret; | |
133 | } | |
134 | ||
9538e1c2 | 135 | static int get_shutter(struct i2c_client *client, u32 *data) |
4e96fd08 GL |
136 | { |
137 | int ret; | |
138 | ||
9538e1c2 | 139 | ret = reg_read(client, MT9T031_SHUTTER_WIDTH_UPPER); |
4e96fd08 GL |
140 | *data = ret << 16; |
141 | ||
142 | if (ret >= 0) | |
9538e1c2 | 143 | ret = reg_read(client, MT9T031_SHUTTER_WIDTH); |
4e96fd08 GL |
144 | *data |= ret & 0xffff; |
145 | ||
146 | return ret < 0 ? ret : 0; | |
147 | } | |
148 | ||
979ea1dd | 149 | static int mt9t031_idle(struct i2c_client *client) |
4e96fd08 GL |
150 | { |
151 | int ret; | |
152 | ||
153 | /* Disable chip output, synchronous option update */ | |
9538e1c2 | 154 | ret = reg_write(client, MT9T031_RESET, 1); |
4e96fd08 | 155 | if (ret >= 0) |
9538e1c2 | 156 | ret = reg_write(client, MT9T031_RESET, 0); |
4e96fd08 | 157 | if (ret >= 0) |
9538e1c2 | 158 | ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 2); |
4e96fd08 GL |
159 | |
160 | return ret >= 0 ? 0 : -EIO; | |
161 | } | |
162 | ||
979ea1dd | 163 | static int mt9t031_disable(struct i2c_client *client) |
4e96fd08 GL |
164 | { |
165 | /* Disable the chip */ | |
9538e1c2 | 166 | reg_clear(client, MT9T031_OUTPUT_CONTROL, 2); |
f9826514 | 167 | |
4e96fd08 GL |
168 | return 0; |
169 | } | |
170 | ||
979ea1dd GL |
171 | static int mt9t031_s_stream(struct v4l2_subdev *sd, int enable) |
172 | { | |
173 | struct i2c_client *client = sd->priv; | |
174 | int ret; | |
175 | ||
176 | if (enable) | |
177 | /* Switch to master "normal" mode */ | |
178 | ret = reg_set(client, MT9T031_OUTPUT_CONTROL, 2); | |
179 | else | |
180 | /* Stop sensor readout */ | |
181 | ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 2); | |
182 | ||
183 | if (ret < 0) | |
4e96fd08 | 184 | return -EIO; |
979ea1dd | 185 | |
4e96fd08 GL |
186 | return 0; |
187 | } | |
188 | ||
189 | static int mt9t031_set_bus_param(struct soc_camera_device *icd, | |
190 | unsigned long flags) | |
191 | { | |
40e2e092 | 192 | struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd)); |
9538e1c2 | 193 | |
4e96fd08 GL |
194 | /* The caller should have queried our parameters, check anyway */ |
195 | if (flags & ~MT9T031_BUS_PARAM) | |
196 | return -EINVAL; | |
197 | ||
198 | if (flags & SOCAM_PCLK_SAMPLE_FALLING) | |
9538e1c2 | 199 | reg_clear(client, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000); |
c98afbfc | 200 | else |
9538e1c2 | 201 | reg_set(client, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000); |
4e96fd08 GL |
202 | |
203 | return 0; | |
204 | } | |
205 | ||
206 | static unsigned long mt9t031_query_bus_param(struct soc_camera_device *icd) | |
207 | { | |
40e2e092 | 208 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
4e96fd08 GL |
209 | |
210 | return soc_camera_apply_sensor_flags(icl, MT9T031_BUS_PARAM); | |
211 | } | |
212 | ||
6a6c8786 GL |
213 | /* target must be _even_ */ |
214 | static u16 mt9t031_skip(s32 *source, s32 target, s32 max) | |
70e1d353 | 215 | { |
6a6c8786 GL |
216 | unsigned int skip; |
217 | ||
218 | if (*source < target + target / 2) { | |
219 | *source = target; | |
220 | return 1; | |
221 | } | |
222 | ||
223 | skip = min(max, *source + target / 2) / target; | |
224 | if (skip > 8) | |
225 | skip = 8; | |
226 | *source = target * skip; | |
227 | ||
228 | return skip; | |
70e1d353 GL |
229 | } |
230 | ||
6a6c8786 | 231 | /* rect is the sensor rectangle, the caller guarantees parameter validity */ |
09e231b3 GL |
232 | static int mt9t031_set_params(struct soc_camera_device *icd, |
233 | struct v4l2_rect *rect, u16 xskip, u16 yskip) | |
4e96fd08 | 234 | { |
40e2e092 | 235 | struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd)); |
979ea1dd | 236 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
4e96fd08 | 237 | int ret; |
6a6c8786 | 238 | u16 xbin, ybin; |
4e96fd08 GL |
239 | const u16 hblank = MT9T031_HORIZONTAL_BLANK, |
240 | vblank = MT9T031_VERTICAL_BLANK; | |
4e96fd08 GL |
241 | |
242 | xbin = min(xskip, (u16)3); | |
243 | ybin = min(yskip, (u16)3); | |
244 | ||
6a6c8786 GL |
245 | /* |
246 | * Could just do roundup(rect->left, [xy]bin * 2); but this is cheaper. | |
247 | * There is always a valid suitably aligned value. The worst case is | |
248 | * xbin = 3, width = 2048. Then we will start at 36, the last read out | |
249 | * pixel will be 2083, which is < 2085 - first black pixel. | |
250 | * | |
251 | * MT9T031 datasheet imposes window left border alignment, depending on | |
252 | * the selected xskip. Failing to conform to this requirement produces | |
253 | * dark horizontal stripes in the image. However, even obeying to this | |
254 | * requirement doesn't eliminate the stripes in all configurations. They | |
255 | * appear "locally reproducibly," but can differ between tests under | |
256 | * different lighting conditions. | |
257 | */ | |
4e96fd08 | 258 | switch (xbin) { |
6a6c8786 GL |
259 | case 1: |
260 | rect->left &= ~1; | |
4e96fd08 | 261 | break; |
4e96fd08 | 262 | case 2: |
6a6c8786 | 263 | rect->left &= ~3; |
4e96fd08 GL |
264 | break; |
265 | case 3: | |
6a6c8786 GL |
266 | rect->left = rect->left > roundup(MT9T031_COLUMN_SKIP, 6) ? |
267 | (rect->left / 6) * 6 : roundup(MT9T031_COLUMN_SKIP, 6); | |
4e96fd08 GL |
268 | } |
269 | ||
6a6c8786 GL |
270 | rect->top &= ~1; |
271 | ||
272 | dev_dbg(&client->dev, "skip %u:%u, rect %ux%u@%u:%u\n", | |
273 | xskip, yskip, rect->width, rect->height, rect->left, rect->top); | |
274 | ||
70e1d353 | 275 | /* Disable register update, reconfigure atomically */ |
9538e1c2 | 276 | ret = reg_set(client, MT9T031_OUTPUT_CONTROL, 1); |
70e1d353 GL |
277 | if (ret < 0) |
278 | return ret; | |
279 | ||
4e96fd08 | 280 | /* Blanking and start values - default... */ |
9538e1c2 | 281 | ret = reg_write(client, MT9T031_HORIZONTAL_BLANKING, hblank); |
4e96fd08 | 282 | if (ret >= 0) |
9538e1c2 | 283 | ret = reg_write(client, MT9T031_VERTICAL_BLANKING, vblank); |
4e96fd08 | 284 | |
09e231b3 | 285 | if (yskip != mt9t031->yskip || xskip != mt9t031->xskip) { |
4e96fd08 GL |
286 | /* Binning, skipping */ |
287 | if (ret >= 0) | |
9538e1c2 | 288 | ret = reg_write(client, MT9T031_COLUMN_ADDRESS_MODE, |
4e96fd08 GL |
289 | ((xbin - 1) << 4) | (xskip - 1)); |
290 | if (ret >= 0) | |
9538e1c2 | 291 | ret = reg_write(client, MT9T031_ROW_ADDRESS_MODE, |
4e96fd08 GL |
292 | ((ybin - 1) << 4) | (yskip - 1)); |
293 | } | |
6a6c8786 GL |
294 | dev_dbg(&client->dev, "new physical left %u, top %u\n", |
295 | rect->left, rect->top); | |
4e96fd08 | 296 | |
5d28d525 GL |
297 | /* |
298 | * The caller provides a supported format, as guaranteed by | |
299 | * icd->try_fmt_cap(), soc_camera_s_crop() and soc_camera_cropcap() | |
300 | */ | |
4e96fd08 | 301 | if (ret >= 0) |
6a6c8786 | 302 | ret = reg_write(client, MT9T031_COLUMN_START, rect->left); |
4e96fd08 | 303 | if (ret >= 0) |
6a6c8786 | 304 | ret = reg_write(client, MT9T031_ROW_START, rect->top); |
4e96fd08 | 305 | if (ret >= 0) |
6a6c8786 | 306 | ret = reg_write(client, MT9T031_WINDOW_WIDTH, rect->width - 1); |
4e96fd08 | 307 | if (ret >= 0) |
9538e1c2 | 308 | ret = reg_write(client, MT9T031_WINDOW_HEIGHT, |
32536108 | 309 | rect->height + mt9t031->y_skip_top - 1); |
4e96fd08 | 310 | if (ret >= 0 && mt9t031->autoexposure) { |
32536108 | 311 | unsigned int total_h = rect->height + mt9t031->y_skip_top + vblank; |
96c75399 | 312 | ret = set_shutter(client, total_h); |
4e96fd08 GL |
313 | if (ret >= 0) { |
314 | const u32 shutter_max = MT9T031_MAX_HEIGHT + vblank; | |
315 | const struct v4l2_queryctrl *qctrl = | |
316 | soc_camera_find_qctrl(icd->ops, | |
317 | V4L2_CID_EXPOSURE); | |
96c75399 GL |
318 | mt9t031->exposure = (shutter_max / 2 + (total_h - 1) * |
319 | (qctrl->maximum - qctrl->minimum)) / | |
4e96fd08 GL |
320 | shutter_max + qctrl->minimum; |
321 | } | |
322 | } | |
323 | ||
09e231b3 GL |
324 | /* Re-enable register update, commit all changes */ |
325 | if (ret >= 0) | |
9538e1c2 | 326 | ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 1); |
09e231b3 | 327 | |
6a6c8786 GL |
328 | if (ret >= 0) { |
329 | mt9t031->rect = *rect; | |
330 | mt9t031->xskip = xskip; | |
331 | mt9t031->yskip = yskip; | |
332 | } | |
333 | ||
09e231b3 GL |
334 | return ret < 0 ? ret : 0; |
335 | } | |
336 | ||
08590b96 | 337 | static int mt9t031_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) |
09e231b3 | 338 | { |
6a6c8786 | 339 | struct v4l2_rect rect = a->c; |
08590b96 | 340 | struct i2c_client *client = sd->priv; |
979ea1dd | 341 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
08590b96 | 342 | struct soc_camera_device *icd = client->dev.platform_data; |
09e231b3 | 343 | |
6a6c8786 GL |
344 | rect.width = ALIGN(rect.width, 2); |
345 | rect.height = ALIGN(rect.height, 2); | |
346 | ||
347 | soc_camera_limit_side(&rect.left, &rect.width, | |
348 | MT9T031_COLUMN_SKIP, MT9T031_MIN_WIDTH, MT9T031_MAX_WIDTH); | |
349 | ||
350 | soc_camera_limit_side(&rect.top, &rect.height, | |
351 | MT9T031_ROW_SKIP, MT9T031_MIN_HEIGHT, MT9T031_MAX_HEIGHT); | |
352 | ||
353 | return mt9t031_set_params(icd, &rect, mt9t031->xskip, mt9t031->yskip); | |
354 | } | |
355 | ||
356 | static int mt9t031_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) | |
357 | { | |
358 | struct i2c_client *client = sd->priv; | |
359 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
360 | ||
361 | a->c = mt9t031->rect; | |
362 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
e330919a | 363 | |
6a6c8786 GL |
364 | return 0; |
365 | } | |
366 | ||
367 | static int mt9t031_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a) | |
368 | { | |
369 | a->bounds.left = MT9T031_COLUMN_SKIP; | |
370 | a->bounds.top = MT9T031_ROW_SKIP; | |
371 | a->bounds.width = MT9T031_MAX_WIDTH; | |
372 | a->bounds.height = MT9T031_MAX_HEIGHT; | |
373 | a->defrect = a->bounds; | |
374 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
375 | a->pixelaspect.numerator = 1; | |
376 | a->pixelaspect.denominator = 1; | |
e330919a | 377 | |
6a6c8786 GL |
378 | return 0; |
379 | } | |
380 | ||
381 | static int mt9t031_g_fmt(struct v4l2_subdev *sd, struct v4l2_format *f) | |
382 | { | |
383 | struct i2c_client *client = sd->priv; | |
384 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
385 | struct v4l2_pix_format *pix = &f->fmt.pix; | |
386 | ||
387 | pix->width = mt9t031->rect.width / mt9t031->xskip; | |
388 | pix->height = mt9t031->rect.height / mt9t031->yskip; | |
389 | pix->pixelformat = V4L2_PIX_FMT_SGRBG10; | |
390 | pix->field = V4L2_FIELD_NONE; | |
391 | pix->colorspace = V4L2_COLORSPACE_SRGB; | |
392 | ||
393 | return 0; | |
09e231b3 GL |
394 | } |
395 | ||
979ea1dd | 396 | static int mt9t031_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *f) |
09e231b3 | 397 | { |
979ea1dd GL |
398 | struct i2c_client *client = sd->priv; |
399 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
400 | struct soc_camera_device *icd = client->dev.platform_data; | |
6a6c8786 | 401 | struct v4l2_pix_format *pix = &f->fmt.pix; |
09e231b3 | 402 | u16 xskip, yskip; |
6a6c8786 | 403 | struct v4l2_rect rect = mt9t031->rect; |
09e231b3 GL |
404 | |
405 | /* | |
6a6c8786 GL |
406 | * try_fmt has put width and height within limits. |
407 | * S_FMT: use binning and skipping for scaling | |
09e231b3 | 408 | */ |
6a6c8786 GL |
409 | xskip = mt9t031_skip(&rect.width, pix->width, MT9T031_MAX_WIDTH); |
410 | yskip = mt9t031_skip(&rect.height, pix->height, MT9T031_MAX_HEIGHT); | |
4e96fd08 | 411 | |
6a6c8786 GL |
412 | /* mt9t031_set_params() doesn't change width and height */ |
413 | return mt9t031_set_params(icd, &rect, xskip, yskip); | |
4e96fd08 GL |
414 | } |
415 | ||
6a6c8786 GL |
416 | /* |
417 | * If a user window larger than sensor window is requested, we'll increase the | |
418 | * sensor window. | |
419 | */ | |
979ea1dd | 420 | static int mt9t031_try_fmt(struct v4l2_subdev *sd, struct v4l2_format *f) |
4e96fd08 GL |
421 | { |
422 | struct v4l2_pix_format *pix = &f->fmt.pix; | |
423 | ||
653dc59b TP |
424 | v4l_bound_align_image( |
425 | &pix->width, MT9T031_MIN_WIDTH, MT9T031_MAX_WIDTH, 1, | |
426 | &pix->height, MT9T031_MIN_HEIGHT, MT9T031_MAX_HEIGHT, 1, 0); | |
4e96fd08 GL |
427 | |
428 | return 0; | |
429 | } | |
430 | ||
979ea1dd GL |
431 | static int mt9t031_g_chip_ident(struct v4l2_subdev *sd, |
432 | struct v4l2_dbg_chip_ident *id) | |
4e96fd08 | 433 | { |
979ea1dd GL |
434 | struct i2c_client *client = sd->priv; |
435 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
4e96fd08 | 436 | |
aecde8b5 | 437 | if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR) |
4e96fd08 GL |
438 | return -EINVAL; |
439 | ||
40e2e092 | 440 | if (id->match.addr != client->addr) |
4e96fd08 GL |
441 | return -ENODEV; |
442 | ||
443 | id->ident = mt9t031->model; | |
444 | id->revision = 0; | |
445 | ||
446 | return 0; | |
447 | } | |
448 | ||
449 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
979ea1dd GL |
450 | static int mt9t031_g_register(struct v4l2_subdev *sd, |
451 | struct v4l2_dbg_register *reg) | |
4e96fd08 | 452 | { |
979ea1dd | 453 | struct i2c_client *client = sd->priv; |
4e96fd08 | 454 | |
aecde8b5 | 455 | if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) |
4e96fd08 GL |
456 | return -EINVAL; |
457 | ||
9538e1c2 | 458 | if (reg->match.addr != client->addr) |
4e96fd08 GL |
459 | return -ENODEV; |
460 | ||
9538e1c2 | 461 | reg->val = reg_read(client, reg->reg); |
4e96fd08 GL |
462 | |
463 | if (reg->val > 0xffff) | |
464 | return -EIO; | |
465 | ||
466 | return 0; | |
467 | } | |
468 | ||
979ea1dd GL |
469 | static int mt9t031_s_register(struct v4l2_subdev *sd, |
470 | struct v4l2_dbg_register *reg) | |
4e96fd08 | 471 | { |
979ea1dd | 472 | struct i2c_client *client = sd->priv; |
4e96fd08 | 473 | |
aecde8b5 | 474 | if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) |
4e96fd08 GL |
475 | return -EINVAL; |
476 | ||
9538e1c2 | 477 | if (reg->match.addr != client->addr) |
4e96fd08 GL |
478 | return -ENODEV; |
479 | ||
9538e1c2 | 480 | if (reg_write(client, reg->reg, reg->val) < 0) |
4e96fd08 GL |
481 | return -EIO; |
482 | ||
483 | return 0; | |
484 | } | |
485 | #endif | |
486 | ||
487 | static const struct v4l2_queryctrl mt9t031_controls[] = { | |
488 | { | |
489 | .id = V4L2_CID_VFLIP, | |
490 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
491 | .name = "Flip Vertically", | |
492 | .minimum = 0, | |
493 | .maximum = 1, | |
494 | .step = 1, | |
495 | .default_value = 0, | |
70e1d353 GL |
496 | }, { |
497 | .id = V4L2_CID_HFLIP, | |
498 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
499 | .name = "Flip Horizontally", | |
500 | .minimum = 0, | |
501 | .maximum = 1, | |
502 | .step = 1, | |
503 | .default_value = 0, | |
4e96fd08 GL |
504 | }, { |
505 | .id = V4L2_CID_GAIN, | |
506 | .type = V4L2_CTRL_TYPE_INTEGER, | |
507 | .name = "Gain", | |
508 | .minimum = 0, | |
509 | .maximum = 127, | |
510 | .step = 1, | |
511 | .default_value = 64, | |
512 | .flags = V4L2_CTRL_FLAG_SLIDER, | |
513 | }, { | |
514 | .id = V4L2_CID_EXPOSURE, | |
515 | .type = V4L2_CTRL_TYPE_INTEGER, | |
516 | .name = "Exposure", | |
517 | .minimum = 1, | |
518 | .maximum = 255, | |
519 | .step = 1, | |
520 | .default_value = 255, | |
521 | .flags = V4L2_CTRL_FLAG_SLIDER, | |
522 | }, { | |
523 | .id = V4L2_CID_EXPOSURE_AUTO, | |
524 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
525 | .name = "Automatic Exposure", | |
526 | .minimum = 0, | |
527 | .maximum = 1, | |
528 | .step = 1, | |
529 | .default_value = 1, | |
530 | } | |
531 | }; | |
532 | ||
4e96fd08 | 533 | static struct soc_camera_ops mt9t031_ops = { |
4e96fd08 GL |
534 | .set_bus_param = mt9t031_set_bus_param, |
535 | .query_bus_param = mt9t031_query_bus_param, | |
536 | .controls = mt9t031_controls, | |
537 | .num_controls = ARRAY_SIZE(mt9t031_controls), | |
4e96fd08 GL |
538 | }; |
539 | ||
979ea1dd | 540 | static int mt9t031_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
4e96fd08 | 541 | { |
979ea1dd GL |
542 | struct i2c_client *client = sd->priv; |
543 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
4e96fd08 GL |
544 | int data; |
545 | ||
546 | switch (ctrl->id) { | |
547 | case V4L2_CID_VFLIP: | |
9538e1c2 | 548 | data = reg_read(client, MT9T031_READ_MODE_2); |
4e96fd08 GL |
549 | if (data < 0) |
550 | return -EIO; | |
551 | ctrl->value = !!(data & 0x8000); | |
552 | break; | |
553 | case V4L2_CID_HFLIP: | |
9538e1c2 | 554 | data = reg_read(client, MT9T031_READ_MODE_2); |
4e96fd08 GL |
555 | if (data < 0) |
556 | return -EIO; | |
557 | ctrl->value = !!(data & 0x4000); | |
558 | break; | |
559 | case V4L2_CID_EXPOSURE_AUTO: | |
560 | ctrl->value = mt9t031->autoexposure; | |
561 | break; | |
96c75399 GL |
562 | case V4L2_CID_GAIN: |
563 | ctrl->value = mt9t031->gain; | |
564 | break; | |
565 | case V4L2_CID_EXPOSURE: | |
566 | ctrl->value = mt9t031->exposure; | |
567 | break; | |
4e96fd08 GL |
568 | } |
569 | return 0; | |
570 | } | |
571 | ||
979ea1dd | 572 | static int mt9t031_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
4e96fd08 | 573 | { |
979ea1dd GL |
574 | struct i2c_client *client = sd->priv; |
575 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
576 | struct soc_camera_device *icd = client->dev.platform_data; | |
4e96fd08 GL |
577 | const struct v4l2_queryctrl *qctrl; |
578 | int data; | |
579 | ||
580 | qctrl = soc_camera_find_qctrl(&mt9t031_ops, ctrl->id); | |
581 | ||
582 | if (!qctrl) | |
583 | return -EINVAL; | |
584 | ||
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: | |
603 | if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum) | |
604 | return -EINVAL; | |
605 | /* See Datasheet Table 7, Gain settings. */ | |
606 | if (ctrl->value <= qctrl->default_value) { | |
607 | /* Pack it into 0..1 step 0.125, register values 0..8 */ | |
608 | unsigned long range = qctrl->default_value - qctrl->minimum; | |
609 | data = ((ctrl->value - qctrl->minimum) * 8 + range / 2) / range; | |
610 | ||
85f8be68 | 611 | dev_dbg(&client->dev, "Setting gain %d\n", data); |
9538e1c2 | 612 | data = reg_write(client, MT9T031_GLOBAL_GAIN, data); |
4e96fd08 GL |
613 | if (data < 0) |
614 | return -EIO; | |
615 | } else { | |
70e1d353 | 616 | /* Pack it into 1.125..128 variable step, register values 9..0x7860 */ |
4e96fd08 GL |
617 | /* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */ |
618 | unsigned long range = qctrl->maximum - qctrl->default_value - 1; | |
70e1d353 | 619 | /* calculated gain: map 65..127 to 9..1024 step 0.125 */ |
4e96fd08 | 620 | unsigned long gain = ((ctrl->value - qctrl->default_value - 1) * |
70e1d353 | 621 | 1015 + range / 2) / range + 9; |
4e96fd08 | 622 | |
70e1d353 | 623 | if (gain <= 32) /* calculated gain 9..32 -> 9..32 */ |
4e96fd08 | 624 | data = gain; |
70e1d353 | 625 | else if (gain <= 64) /* calculated gain 33..64 -> 0x51..0x60 */ |
4e96fd08 GL |
626 | data = ((gain - 32) * 16 + 16) / 32 + 80; |
627 | else | |
70e1d353 GL |
628 | /* calculated gain 65..1024 -> (1..120) << 8 + 0x60 */ |
629 | data = (((gain - 64 + 7) * 32) & 0xff00) | 0x60; | |
4e96fd08 | 630 | |
85f8be68 | 631 | dev_dbg(&client->dev, "Set gain from 0x%x to 0x%x\n", |
9538e1c2 GL |
632 | reg_read(client, MT9T031_GLOBAL_GAIN), data); |
633 | data = reg_write(client, MT9T031_GLOBAL_GAIN, data); | |
4e96fd08 GL |
634 | if (data < 0) |
635 | return -EIO; | |
636 | } | |
637 | ||
638 | /* Success */ | |
96c75399 | 639 | mt9t031->gain = ctrl->value; |
4e96fd08 GL |
640 | break; |
641 | case V4L2_CID_EXPOSURE: | |
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 GL |
668 | return -EIO; |
669 | qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_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; | |
677 | } | |
678 | return 0; | |
679 | } | |
680 | ||
5d28d525 GL |
681 | /* |
682 | * Interface active, can use i2c. If it fails, it can indeed mean, that | |
683 | * this wasn't our capture interface, so, we wait for the right one | |
684 | */ | |
979ea1dd | 685 | static int mt9t031_video_probe(struct i2c_client *client) |
4e96fd08 | 686 | { |
979ea1dd GL |
687 | struct soc_camera_device *icd = client->dev.platform_data; |
688 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
4e96fd08 | 689 | s32 data; |
a4c56fd8 | 690 | int ret; |
4e96fd08 | 691 | |
4e96fd08 | 692 | /* Enable the chip */ |
9538e1c2 | 693 | data = reg_write(client, MT9T031_CHIP_ENABLE, 1); |
85f8be68 | 694 | dev_dbg(&client->dev, "write: %d\n", data); |
4e96fd08 GL |
695 | |
696 | /* Read out the chip version register */ | |
9538e1c2 | 697 | data = reg_read(client, MT9T031_CHIP_VERSION); |
4e96fd08 GL |
698 | |
699 | switch (data) { | |
700 | case 0x1621: | |
701 | mt9t031->model = V4L2_IDENT_MT9T031; | |
702 | icd->formats = mt9t031_colour_formats; | |
703 | icd->num_formats = ARRAY_SIZE(mt9t031_colour_formats); | |
704 | break; | |
705 | default: | |
85f8be68 | 706 | dev_err(&client->dev, |
4e96fd08 | 707 | "No MT9T031 chip detected, register read %x\n", data); |
40e2e092 | 708 | return -ENODEV; |
4e96fd08 GL |
709 | } |
710 | ||
85f8be68 | 711 | dev_info(&client->dev, "Detected a MT9T031 chip ID %x\n", data); |
4e96fd08 | 712 | |
a4c56fd8 GL |
713 | ret = mt9t031_idle(client); |
714 | if (ret < 0) | |
715 | dev_err(&client->dev, "Failed to initialise the camera\n"); | |
716 | ||
96c75399 GL |
717 | /* mt9t031_idle() has reset the chip to default. */ |
718 | mt9t031->exposure = 255; | |
719 | mt9t031->gain = 64; | |
720 | ||
a4c56fd8 | 721 | return ret; |
4e96fd08 GL |
722 | } |
723 | ||
32536108 GL |
724 | static int mt9t031_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines) |
725 | { | |
726 | struct i2c_client *client = sd->priv; | |
727 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
728 | ||
729 | *lines = mt9t031->y_skip_top; | |
730 | ||
731 | return 0; | |
732 | } | |
733 | ||
979ea1dd GL |
734 | static struct v4l2_subdev_core_ops mt9t031_subdev_core_ops = { |
735 | .g_ctrl = mt9t031_g_ctrl, | |
736 | .s_ctrl = mt9t031_s_ctrl, | |
737 | .g_chip_ident = mt9t031_g_chip_ident, | |
738 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
739 | .g_register = mt9t031_g_register, | |
740 | .s_register = mt9t031_s_register, | |
741 | #endif | |
742 | }; | |
743 | ||
744 | static struct v4l2_subdev_video_ops mt9t031_subdev_video_ops = { | |
745 | .s_stream = mt9t031_s_stream, | |
746 | .s_fmt = mt9t031_s_fmt, | |
6a6c8786 | 747 | .g_fmt = mt9t031_g_fmt, |
979ea1dd | 748 | .try_fmt = mt9t031_try_fmt, |
08590b96 | 749 | .s_crop = mt9t031_s_crop, |
6a6c8786 GL |
750 | .g_crop = mt9t031_g_crop, |
751 | .cropcap = mt9t031_cropcap, | |
979ea1dd GL |
752 | }; |
753 | ||
32536108 GL |
754 | static struct v4l2_subdev_sensor_ops mt9t031_subdev_sensor_ops = { |
755 | .g_skip_top_lines = mt9t031_g_skip_top_lines, | |
756 | }; | |
757 | ||
979ea1dd GL |
758 | static struct v4l2_subdev_ops mt9t031_subdev_ops = { |
759 | .core = &mt9t031_subdev_core_ops, | |
760 | .video = &mt9t031_subdev_video_ops, | |
32536108 | 761 | .sensor = &mt9t031_subdev_sensor_ops, |
979ea1dd GL |
762 | }; |
763 | ||
4e96fd08 GL |
764 | static int mt9t031_probe(struct i2c_client *client, |
765 | const struct i2c_device_id *did) | |
766 | { | |
767 | struct mt9t031 *mt9t031; | |
40e2e092 | 768 | struct soc_camera_device *icd = client->dev.platform_data; |
4e96fd08 | 769 | struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); |
40e2e092 | 770 | struct soc_camera_link *icl; |
4e96fd08 GL |
771 | int ret; |
772 | ||
40e2e092 GL |
773 | if (!icd) { |
774 | dev_err(&client->dev, "MT9T031: missing soc-camera data!\n"); | |
775 | return -EINVAL; | |
776 | } | |
777 | ||
778 | icl = to_soc_camera_link(icd); | |
4e96fd08 GL |
779 | if (!icl) { |
780 | dev_err(&client->dev, "MT9T031 driver needs platform data\n"); | |
781 | return -EINVAL; | |
782 | } | |
783 | ||
784 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) { | |
785 | dev_warn(&adapter->dev, | |
786 | "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n"); | |
787 | return -EIO; | |
788 | } | |
789 | ||
790 | mt9t031 = kzalloc(sizeof(struct mt9t031), GFP_KERNEL); | |
791 | if (!mt9t031) | |
792 | return -ENOMEM; | |
793 | ||
979ea1dd | 794 | v4l2_i2c_subdev_init(&mt9t031->subdev, client, &mt9t031_subdev_ops); |
4e96fd08 GL |
795 | |
796 | /* Second stage probe - when a capture adapter is there */ | |
a0705b07 | 797 | icd->ops = &mt9t031_ops; |
6a6c8786 | 798 | |
32536108 | 799 | mt9t031->y_skip_top = 0; |
6a6c8786 GL |
800 | mt9t031->rect.left = MT9T031_COLUMN_SKIP; |
801 | mt9t031->rect.top = MT9T031_ROW_SKIP; | |
802 | mt9t031->rect.width = MT9T031_MAX_WIDTH; | |
803 | mt9t031->rect.height = MT9T031_MAX_HEIGHT; | |
804 | ||
5d28d525 GL |
805 | /* |
806 | * Simulated autoexposure. If enabled, we calculate shutter width | |
807 | * ourselves in the driver based on vertical blanking and frame width | |
808 | */ | |
4e96fd08 GL |
809 | mt9t031->autoexposure = 1; |
810 | ||
811 | mt9t031->xskip = 1; | |
812 | mt9t031->yskip = 1; | |
813 | ||
979ea1dd GL |
814 | mt9t031_idle(client); |
815 | ||
816 | ret = mt9t031_video_probe(client); | |
817 | ||
818 | mt9t031_disable(client); | |
819 | ||
40e2e092 GL |
820 | if (ret) { |
821 | icd->ops = NULL; | |
822 | i2c_set_clientdata(client, NULL); | |
823 | kfree(mt9t031); | |
824 | } | |
4e96fd08 | 825 | |
4e96fd08 GL |
826 | return ret; |
827 | } | |
828 | ||
829 | static int mt9t031_remove(struct i2c_client *client) | |
830 | { | |
979ea1dd | 831 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
40e2e092 | 832 | struct soc_camera_device *icd = client->dev.platform_data; |
4e96fd08 | 833 | |
40e2e092 | 834 | icd->ops = NULL; |
4e96fd08 | 835 | i2c_set_clientdata(client, NULL); |
40e2e092 | 836 | client->driver = NULL; |
4e96fd08 GL |
837 | kfree(mt9t031); |
838 | ||
839 | return 0; | |
840 | } | |
841 | ||
842 | static const struct i2c_device_id mt9t031_id[] = { | |
843 | { "mt9t031", 0 }, | |
844 | { } | |
845 | }; | |
846 | MODULE_DEVICE_TABLE(i2c, mt9t031_id); | |
847 | ||
848 | static struct i2c_driver mt9t031_i2c_driver = { | |
849 | .driver = { | |
850 | .name = "mt9t031", | |
851 | }, | |
852 | .probe = mt9t031_probe, | |
853 | .remove = mt9t031_remove, | |
854 | .id_table = mt9t031_id, | |
855 | }; | |
856 | ||
857 | static int __init mt9t031_mod_init(void) | |
858 | { | |
859 | return i2c_add_driver(&mt9t031_i2c_driver); | |
860 | } | |
861 | ||
862 | static void __exit mt9t031_mod_exit(void) | |
863 | { | |
864 | i2c_del_driver(&mt9t031_i2c_driver); | |
865 | } | |
866 | ||
867 | module_init(mt9t031_mod_init); | |
868 | module_exit(mt9t031_mod_exit); | |
869 | ||
870 | MODULE_DESCRIPTION("Micron MT9T031 Camera driver"); | |
871 | MODULE_AUTHOR("Guennadi Liakhovetski <lg@denx.de>"); | |
872 | MODULE_LICENSE("GPL v2"); |