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 | ||
20 | /* mt9t031 i2c address 0x5d | |
979ea1dd GL |
21 | * The platform has to define i2c_board_info and link to it from |
22 | * struct soc_camera_link */ | |
4e96fd08 GL |
23 | |
24 | /* mt9t031 selected register addresses */ | |
25 | #define MT9T031_CHIP_VERSION 0x00 | |
26 | #define MT9T031_ROW_START 0x01 | |
27 | #define MT9T031_COLUMN_START 0x02 | |
28 | #define MT9T031_WINDOW_HEIGHT 0x03 | |
29 | #define MT9T031_WINDOW_WIDTH 0x04 | |
30 | #define MT9T031_HORIZONTAL_BLANKING 0x05 | |
31 | #define MT9T031_VERTICAL_BLANKING 0x06 | |
32 | #define MT9T031_OUTPUT_CONTROL 0x07 | |
33 | #define MT9T031_SHUTTER_WIDTH_UPPER 0x08 | |
34 | #define MT9T031_SHUTTER_WIDTH 0x09 | |
35 | #define MT9T031_PIXEL_CLOCK_CONTROL 0x0a | |
36 | #define MT9T031_FRAME_RESTART 0x0b | |
37 | #define MT9T031_SHUTTER_DELAY 0x0c | |
38 | #define MT9T031_RESET 0x0d | |
39 | #define MT9T031_READ_MODE_1 0x1e | |
40 | #define MT9T031_READ_MODE_2 0x20 | |
41 | #define MT9T031_READ_MODE_3 0x21 | |
42 | #define MT9T031_ROW_ADDRESS_MODE 0x22 | |
43 | #define MT9T031_COLUMN_ADDRESS_MODE 0x23 | |
44 | #define MT9T031_GLOBAL_GAIN 0x35 | |
45 | #define MT9T031_CHIP_ENABLE 0xF8 | |
46 | ||
47 | #define MT9T031_MAX_HEIGHT 1536 | |
48 | #define MT9T031_MAX_WIDTH 2048 | |
49 | #define MT9T031_MIN_HEIGHT 2 | |
6a6c8786 | 50 | #define MT9T031_MIN_WIDTH 18 |
4e96fd08 GL |
51 | #define MT9T031_HORIZONTAL_BLANK 142 |
52 | #define MT9T031_VERTICAL_BLANK 25 | |
53 | #define MT9T031_COLUMN_SKIP 32 | |
54 | #define MT9T031_ROW_SKIP 20 | |
55 | ||
56 | #define MT9T031_BUS_PARAM (SOCAM_PCLK_SAMPLE_RISING | \ | |
57 | SOCAM_PCLK_SAMPLE_FALLING | SOCAM_HSYNC_ACTIVE_HIGH | \ | |
58 | SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_DATA_ACTIVE_HIGH | \ | |
59 | SOCAM_MASTER | SOCAM_DATAWIDTH_10) | |
60 | ||
61 | static const struct soc_camera_data_format mt9t031_colour_formats[] = { | |
62 | { | |
63 | .name = "Bayer (sRGB) 10 bit", | |
64 | .depth = 10, | |
65 | .fourcc = V4L2_PIX_FMT_SGRBG10, | |
66 | .colorspace = V4L2_COLORSPACE_SRGB, | |
67 | } | |
68 | }; | |
69 | ||
70 | struct mt9t031 { | |
979ea1dd | 71 | struct v4l2_subdev subdev; |
6a6c8786 | 72 | struct v4l2_rect rect; /* Sensor window */ |
4e96fd08 | 73 | int model; /* V4L2_IDENT_MT9T031* codes from v4l2-chip-ident.h */ |
4e96fd08 GL |
74 | u16 xskip; |
75 | u16 yskip; | |
96c75399 GL |
76 | unsigned int gain; |
77 | unsigned int exposure; | |
6a6c8786 | 78 | unsigned char autoexposure; |
4e96fd08 GL |
79 | }; |
80 | ||
979ea1dd GL |
81 | static struct mt9t031 *to_mt9t031(const struct i2c_client *client) |
82 | { | |
83 | return container_of(i2c_get_clientdata(client), struct mt9t031, subdev); | |
84 | } | |
85 | ||
9538e1c2 | 86 | static int reg_read(struct i2c_client *client, const u8 reg) |
4e96fd08 | 87 | { |
4e96fd08 GL |
88 | s32 data = i2c_smbus_read_word_data(client, reg); |
89 | return data < 0 ? data : swab16(data); | |
90 | } | |
91 | ||
9538e1c2 | 92 | static int reg_write(struct i2c_client *client, const u8 reg, |
4e96fd08 GL |
93 | const u16 data) |
94 | { | |
9538e1c2 | 95 | return i2c_smbus_write_word_data(client, reg, swab16(data)); |
4e96fd08 GL |
96 | } |
97 | ||
9538e1c2 | 98 | static int reg_set(struct i2c_client *client, const u8 reg, |
4e96fd08 GL |
99 | const u16 data) |
100 | { | |
101 | int ret; | |
102 | ||
9538e1c2 | 103 | ret = reg_read(client, reg); |
4e96fd08 GL |
104 | if (ret < 0) |
105 | return ret; | |
9538e1c2 | 106 | return reg_write(client, reg, ret | data); |
4e96fd08 GL |
107 | } |
108 | ||
9538e1c2 | 109 | static int reg_clear(struct i2c_client *client, const u8 reg, |
4e96fd08 GL |
110 | const u16 data) |
111 | { | |
112 | int ret; | |
113 | ||
9538e1c2 | 114 | ret = reg_read(client, reg); |
4e96fd08 GL |
115 | if (ret < 0) |
116 | return ret; | |
9538e1c2 | 117 | return reg_write(client, reg, ret & ~data); |
4e96fd08 GL |
118 | } |
119 | ||
9538e1c2 | 120 | static int set_shutter(struct i2c_client *client, const u32 data) |
4e96fd08 GL |
121 | { |
122 | int ret; | |
123 | ||
9538e1c2 | 124 | ret = reg_write(client, MT9T031_SHUTTER_WIDTH_UPPER, data >> 16); |
4e96fd08 GL |
125 | |
126 | if (ret >= 0) | |
9538e1c2 | 127 | ret = reg_write(client, MT9T031_SHUTTER_WIDTH, data & 0xffff); |
4e96fd08 GL |
128 | |
129 | return ret; | |
130 | } | |
131 | ||
9538e1c2 | 132 | static int get_shutter(struct i2c_client *client, u32 *data) |
4e96fd08 GL |
133 | { |
134 | int ret; | |
135 | ||
9538e1c2 | 136 | ret = reg_read(client, MT9T031_SHUTTER_WIDTH_UPPER); |
4e96fd08 GL |
137 | *data = ret << 16; |
138 | ||
139 | if (ret >= 0) | |
9538e1c2 | 140 | ret = reg_read(client, MT9T031_SHUTTER_WIDTH); |
4e96fd08 GL |
141 | *data |= ret & 0xffff; |
142 | ||
143 | return ret < 0 ? ret : 0; | |
144 | } | |
145 | ||
979ea1dd | 146 | static int mt9t031_idle(struct i2c_client *client) |
4e96fd08 GL |
147 | { |
148 | int ret; | |
149 | ||
150 | /* Disable chip output, synchronous option update */ | |
9538e1c2 | 151 | ret = reg_write(client, MT9T031_RESET, 1); |
4e96fd08 | 152 | if (ret >= 0) |
9538e1c2 | 153 | ret = reg_write(client, MT9T031_RESET, 0); |
4e96fd08 | 154 | if (ret >= 0) |
9538e1c2 | 155 | ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 2); |
4e96fd08 GL |
156 | |
157 | return ret >= 0 ? 0 : -EIO; | |
158 | } | |
159 | ||
979ea1dd | 160 | static int mt9t031_disable(struct i2c_client *client) |
4e96fd08 GL |
161 | { |
162 | /* Disable the chip */ | |
9538e1c2 | 163 | reg_clear(client, MT9T031_OUTPUT_CONTROL, 2); |
f9826514 | 164 | |
4e96fd08 GL |
165 | return 0; |
166 | } | |
167 | ||
979ea1dd GL |
168 | static int mt9t031_s_stream(struct v4l2_subdev *sd, int enable) |
169 | { | |
170 | struct i2c_client *client = sd->priv; | |
171 | int ret; | |
172 | ||
173 | if (enable) | |
174 | /* Switch to master "normal" mode */ | |
175 | ret = reg_set(client, MT9T031_OUTPUT_CONTROL, 2); | |
176 | else | |
177 | /* Stop sensor readout */ | |
178 | ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 2); | |
179 | ||
180 | if (ret < 0) | |
4e96fd08 | 181 | return -EIO; |
979ea1dd | 182 | |
4e96fd08 GL |
183 | return 0; |
184 | } | |
185 | ||
186 | static int mt9t031_set_bus_param(struct soc_camera_device *icd, | |
187 | unsigned long flags) | |
188 | { | |
40e2e092 | 189 | struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd)); |
9538e1c2 | 190 | |
4e96fd08 GL |
191 | /* The caller should have queried our parameters, check anyway */ |
192 | if (flags & ~MT9T031_BUS_PARAM) | |
193 | return -EINVAL; | |
194 | ||
195 | if (flags & SOCAM_PCLK_SAMPLE_FALLING) | |
9538e1c2 | 196 | reg_clear(client, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000); |
c98afbfc | 197 | else |
9538e1c2 | 198 | reg_set(client, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000); |
4e96fd08 GL |
199 | |
200 | return 0; | |
201 | } | |
202 | ||
203 | static unsigned long mt9t031_query_bus_param(struct soc_camera_device *icd) | |
204 | { | |
40e2e092 | 205 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
4e96fd08 GL |
206 | |
207 | return soc_camera_apply_sensor_flags(icl, MT9T031_BUS_PARAM); | |
208 | } | |
209 | ||
6a6c8786 GL |
210 | /* target must be _even_ */ |
211 | static u16 mt9t031_skip(s32 *source, s32 target, s32 max) | |
70e1d353 | 212 | { |
6a6c8786 GL |
213 | unsigned int skip; |
214 | ||
215 | if (*source < target + target / 2) { | |
216 | *source = target; | |
217 | return 1; | |
218 | } | |
219 | ||
220 | skip = min(max, *source + target / 2) / target; | |
221 | if (skip > 8) | |
222 | skip = 8; | |
223 | *source = target * skip; | |
224 | ||
225 | return skip; | |
70e1d353 GL |
226 | } |
227 | ||
6a6c8786 | 228 | /* rect is the sensor rectangle, the caller guarantees parameter validity */ |
09e231b3 GL |
229 | static int mt9t031_set_params(struct soc_camera_device *icd, |
230 | struct v4l2_rect *rect, u16 xskip, u16 yskip) | |
4e96fd08 | 231 | { |
40e2e092 | 232 | struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd)); |
979ea1dd | 233 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
4e96fd08 | 234 | int ret; |
6a6c8786 | 235 | u16 xbin, ybin; |
4e96fd08 GL |
236 | const u16 hblank = MT9T031_HORIZONTAL_BLANK, |
237 | vblank = MT9T031_VERTICAL_BLANK; | |
4e96fd08 GL |
238 | |
239 | xbin = min(xskip, (u16)3); | |
240 | ybin = min(yskip, (u16)3); | |
241 | ||
6a6c8786 GL |
242 | /* |
243 | * Could just do roundup(rect->left, [xy]bin * 2); but this is cheaper. | |
244 | * There is always a valid suitably aligned value. The worst case is | |
245 | * xbin = 3, width = 2048. Then we will start at 36, the last read out | |
246 | * pixel will be 2083, which is < 2085 - first black pixel. | |
247 | * | |
248 | * MT9T031 datasheet imposes window left border alignment, depending on | |
249 | * the selected xskip. Failing to conform to this requirement produces | |
250 | * dark horizontal stripes in the image. However, even obeying to this | |
251 | * requirement doesn't eliminate the stripes in all configurations. They | |
252 | * appear "locally reproducibly," but can differ between tests under | |
253 | * different lighting conditions. | |
254 | */ | |
4e96fd08 | 255 | switch (xbin) { |
6a6c8786 GL |
256 | case 1: |
257 | rect->left &= ~1; | |
4e96fd08 | 258 | break; |
4e96fd08 | 259 | case 2: |
6a6c8786 | 260 | rect->left &= ~3; |
4e96fd08 GL |
261 | break; |
262 | case 3: | |
6a6c8786 GL |
263 | rect->left = rect->left > roundup(MT9T031_COLUMN_SKIP, 6) ? |
264 | (rect->left / 6) * 6 : roundup(MT9T031_COLUMN_SKIP, 6); | |
4e96fd08 GL |
265 | } |
266 | ||
6a6c8786 GL |
267 | rect->top &= ~1; |
268 | ||
269 | dev_dbg(&client->dev, "skip %u:%u, rect %ux%u@%u:%u\n", | |
270 | xskip, yskip, rect->width, rect->height, rect->left, rect->top); | |
271 | ||
70e1d353 | 272 | /* Disable register update, reconfigure atomically */ |
9538e1c2 | 273 | ret = reg_set(client, MT9T031_OUTPUT_CONTROL, 1); |
70e1d353 GL |
274 | if (ret < 0) |
275 | return ret; | |
276 | ||
4e96fd08 | 277 | /* Blanking and start values - default... */ |
9538e1c2 | 278 | ret = reg_write(client, MT9T031_HORIZONTAL_BLANKING, hblank); |
4e96fd08 | 279 | if (ret >= 0) |
9538e1c2 | 280 | ret = reg_write(client, MT9T031_VERTICAL_BLANKING, vblank); |
4e96fd08 | 281 | |
09e231b3 | 282 | if (yskip != mt9t031->yskip || xskip != mt9t031->xskip) { |
4e96fd08 GL |
283 | /* Binning, skipping */ |
284 | if (ret >= 0) | |
9538e1c2 | 285 | ret = reg_write(client, MT9T031_COLUMN_ADDRESS_MODE, |
4e96fd08 GL |
286 | ((xbin - 1) << 4) | (xskip - 1)); |
287 | if (ret >= 0) | |
9538e1c2 | 288 | ret = reg_write(client, MT9T031_ROW_ADDRESS_MODE, |
4e96fd08 GL |
289 | ((ybin - 1) << 4) | (yskip - 1)); |
290 | } | |
6a6c8786 GL |
291 | dev_dbg(&client->dev, "new physical left %u, top %u\n", |
292 | rect->left, rect->top); | |
4e96fd08 GL |
293 | |
294 | /* The caller provides a supported format, as guaranteed by | |
295 | * icd->try_fmt_cap(), soc_camera_s_crop() and soc_camera_cropcap() */ | |
296 | if (ret >= 0) | |
6a6c8786 | 297 | ret = reg_write(client, MT9T031_COLUMN_START, rect->left); |
4e96fd08 | 298 | if (ret >= 0) |
6a6c8786 | 299 | ret = reg_write(client, MT9T031_ROW_START, rect->top); |
4e96fd08 | 300 | if (ret >= 0) |
6a6c8786 | 301 | ret = reg_write(client, MT9T031_WINDOW_WIDTH, rect->width - 1); |
4e96fd08 | 302 | if (ret >= 0) |
9538e1c2 | 303 | ret = reg_write(client, MT9T031_WINDOW_HEIGHT, |
6a6c8786 | 304 | rect->height + icd->y_skip_top - 1); |
4e96fd08 | 305 | if (ret >= 0 && mt9t031->autoexposure) { |
96c75399 GL |
306 | unsigned int total_h = rect->height + icd->y_skip_top + vblank; |
307 | ret = set_shutter(client, total_h); | |
4e96fd08 GL |
308 | if (ret >= 0) { |
309 | const u32 shutter_max = MT9T031_MAX_HEIGHT + vblank; | |
310 | const struct v4l2_queryctrl *qctrl = | |
311 | soc_camera_find_qctrl(icd->ops, | |
312 | V4L2_CID_EXPOSURE); | |
96c75399 GL |
313 | mt9t031->exposure = (shutter_max / 2 + (total_h - 1) * |
314 | (qctrl->maximum - qctrl->minimum)) / | |
4e96fd08 GL |
315 | shutter_max + qctrl->minimum; |
316 | } | |
317 | } | |
318 | ||
09e231b3 GL |
319 | /* Re-enable register update, commit all changes */ |
320 | if (ret >= 0) | |
9538e1c2 | 321 | ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 1); |
09e231b3 | 322 | |
6a6c8786 GL |
323 | if (ret >= 0) { |
324 | mt9t031->rect = *rect; | |
325 | mt9t031->xskip = xskip; | |
326 | mt9t031->yskip = yskip; | |
327 | } | |
328 | ||
09e231b3 GL |
329 | return ret < 0 ? ret : 0; |
330 | } | |
331 | ||
08590b96 | 332 | static int mt9t031_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) |
09e231b3 | 333 | { |
6a6c8786 | 334 | struct v4l2_rect rect = a->c; |
08590b96 | 335 | struct i2c_client *client = sd->priv; |
979ea1dd | 336 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
08590b96 | 337 | struct soc_camera_device *icd = client->dev.platform_data; |
09e231b3 | 338 | |
6a6c8786 GL |
339 | rect.width = ALIGN(rect.width, 2); |
340 | rect.height = ALIGN(rect.height, 2); | |
341 | ||
342 | soc_camera_limit_side(&rect.left, &rect.width, | |
343 | MT9T031_COLUMN_SKIP, MT9T031_MIN_WIDTH, MT9T031_MAX_WIDTH); | |
344 | ||
345 | soc_camera_limit_side(&rect.top, &rect.height, | |
346 | MT9T031_ROW_SKIP, MT9T031_MIN_HEIGHT, MT9T031_MAX_HEIGHT); | |
347 | ||
348 | return mt9t031_set_params(icd, &rect, mt9t031->xskip, mt9t031->yskip); | |
349 | } | |
350 | ||
351 | static int mt9t031_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) | |
352 | { | |
353 | struct i2c_client *client = sd->priv; | |
354 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
355 | ||
356 | a->c = mt9t031->rect; | |
357 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
e330919a | 358 | |
6a6c8786 GL |
359 | return 0; |
360 | } | |
361 | ||
362 | static int mt9t031_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a) | |
363 | { | |
364 | a->bounds.left = MT9T031_COLUMN_SKIP; | |
365 | a->bounds.top = MT9T031_ROW_SKIP; | |
366 | a->bounds.width = MT9T031_MAX_WIDTH; | |
367 | a->bounds.height = MT9T031_MAX_HEIGHT; | |
368 | a->defrect = a->bounds; | |
369 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
370 | a->pixelaspect.numerator = 1; | |
371 | a->pixelaspect.denominator = 1; | |
e330919a | 372 | |
6a6c8786 GL |
373 | return 0; |
374 | } | |
375 | ||
376 | static int mt9t031_g_fmt(struct v4l2_subdev *sd, struct v4l2_format *f) | |
377 | { | |
378 | struct i2c_client *client = sd->priv; | |
379 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
380 | struct v4l2_pix_format *pix = &f->fmt.pix; | |
381 | ||
382 | pix->width = mt9t031->rect.width / mt9t031->xskip; | |
383 | pix->height = mt9t031->rect.height / mt9t031->yskip; | |
384 | pix->pixelformat = V4L2_PIX_FMT_SGRBG10; | |
385 | pix->field = V4L2_FIELD_NONE; | |
386 | pix->colorspace = V4L2_COLORSPACE_SRGB; | |
387 | ||
388 | return 0; | |
09e231b3 GL |
389 | } |
390 | ||
979ea1dd | 391 | static int mt9t031_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *f) |
09e231b3 | 392 | { |
979ea1dd GL |
393 | struct i2c_client *client = sd->priv; |
394 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
395 | struct soc_camera_device *icd = client->dev.platform_data; | |
6a6c8786 | 396 | struct v4l2_pix_format *pix = &f->fmt.pix; |
09e231b3 | 397 | u16 xskip, yskip; |
6a6c8786 | 398 | struct v4l2_rect rect = mt9t031->rect; |
09e231b3 GL |
399 | |
400 | /* | |
6a6c8786 GL |
401 | * try_fmt has put width and height within limits. |
402 | * S_FMT: use binning and skipping for scaling | |
09e231b3 | 403 | */ |
6a6c8786 GL |
404 | xskip = mt9t031_skip(&rect.width, pix->width, MT9T031_MAX_WIDTH); |
405 | yskip = mt9t031_skip(&rect.height, pix->height, MT9T031_MAX_HEIGHT); | |
4e96fd08 | 406 | |
6a6c8786 GL |
407 | /* mt9t031_set_params() doesn't change width and height */ |
408 | return mt9t031_set_params(icd, &rect, xskip, yskip); | |
4e96fd08 GL |
409 | } |
410 | ||
6a6c8786 GL |
411 | /* |
412 | * If a user window larger than sensor window is requested, we'll increase the | |
413 | * sensor window. | |
414 | */ | |
979ea1dd | 415 | static int mt9t031_try_fmt(struct v4l2_subdev *sd, struct v4l2_format *f) |
4e96fd08 GL |
416 | { |
417 | struct v4l2_pix_format *pix = &f->fmt.pix; | |
418 | ||
653dc59b TP |
419 | v4l_bound_align_image( |
420 | &pix->width, MT9T031_MIN_WIDTH, MT9T031_MAX_WIDTH, 1, | |
421 | &pix->height, MT9T031_MIN_HEIGHT, MT9T031_MAX_HEIGHT, 1, 0); | |
4e96fd08 GL |
422 | |
423 | return 0; | |
424 | } | |
425 | ||
979ea1dd GL |
426 | static int mt9t031_g_chip_ident(struct v4l2_subdev *sd, |
427 | struct v4l2_dbg_chip_ident *id) | |
4e96fd08 | 428 | { |
979ea1dd GL |
429 | struct i2c_client *client = sd->priv; |
430 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
4e96fd08 | 431 | |
aecde8b5 | 432 | if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR) |
4e96fd08 GL |
433 | return -EINVAL; |
434 | ||
40e2e092 | 435 | if (id->match.addr != client->addr) |
4e96fd08 GL |
436 | return -ENODEV; |
437 | ||
438 | id->ident = mt9t031->model; | |
439 | id->revision = 0; | |
440 | ||
441 | return 0; | |
442 | } | |
443 | ||
444 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
979ea1dd GL |
445 | static int mt9t031_g_register(struct v4l2_subdev *sd, |
446 | struct v4l2_dbg_register *reg) | |
4e96fd08 | 447 | { |
979ea1dd | 448 | struct i2c_client *client = sd->priv; |
4e96fd08 | 449 | |
aecde8b5 | 450 | if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) |
4e96fd08 GL |
451 | return -EINVAL; |
452 | ||
9538e1c2 | 453 | if (reg->match.addr != client->addr) |
4e96fd08 GL |
454 | return -ENODEV; |
455 | ||
9538e1c2 | 456 | reg->val = reg_read(client, reg->reg); |
4e96fd08 GL |
457 | |
458 | if (reg->val > 0xffff) | |
459 | return -EIO; | |
460 | ||
461 | return 0; | |
462 | } | |
463 | ||
979ea1dd GL |
464 | static int mt9t031_s_register(struct v4l2_subdev *sd, |
465 | struct v4l2_dbg_register *reg) | |
4e96fd08 | 466 | { |
979ea1dd | 467 | struct i2c_client *client = sd->priv; |
4e96fd08 | 468 | |
aecde8b5 | 469 | if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) |
4e96fd08 GL |
470 | return -EINVAL; |
471 | ||
9538e1c2 | 472 | if (reg->match.addr != client->addr) |
4e96fd08 GL |
473 | return -ENODEV; |
474 | ||
9538e1c2 | 475 | if (reg_write(client, reg->reg, reg->val) < 0) |
4e96fd08 GL |
476 | return -EIO; |
477 | ||
478 | return 0; | |
479 | } | |
480 | #endif | |
481 | ||
482 | static const struct v4l2_queryctrl mt9t031_controls[] = { | |
483 | { | |
484 | .id = V4L2_CID_VFLIP, | |
485 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
486 | .name = "Flip Vertically", | |
487 | .minimum = 0, | |
488 | .maximum = 1, | |
489 | .step = 1, | |
490 | .default_value = 0, | |
70e1d353 GL |
491 | }, { |
492 | .id = V4L2_CID_HFLIP, | |
493 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
494 | .name = "Flip Horizontally", | |
495 | .minimum = 0, | |
496 | .maximum = 1, | |
497 | .step = 1, | |
498 | .default_value = 0, | |
4e96fd08 GL |
499 | }, { |
500 | .id = V4L2_CID_GAIN, | |
501 | .type = V4L2_CTRL_TYPE_INTEGER, | |
502 | .name = "Gain", | |
503 | .minimum = 0, | |
504 | .maximum = 127, | |
505 | .step = 1, | |
506 | .default_value = 64, | |
507 | .flags = V4L2_CTRL_FLAG_SLIDER, | |
508 | }, { | |
509 | .id = V4L2_CID_EXPOSURE, | |
510 | .type = V4L2_CTRL_TYPE_INTEGER, | |
511 | .name = "Exposure", | |
512 | .minimum = 1, | |
513 | .maximum = 255, | |
514 | .step = 1, | |
515 | .default_value = 255, | |
516 | .flags = V4L2_CTRL_FLAG_SLIDER, | |
517 | }, { | |
518 | .id = V4L2_CID_EXPOSURE_AUTO, | |
519 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
520 | .name = "Automatic Exposure", | |
521 | .minimum = 0, | |
522 | .maximum = 1, | |
523 | .step = 1, | |
524 | .default_value = 1, | |
525 | } | |
526 | }; | |
527 | ||
4e96fd08 | 528 | static struct soc_camera_ops mt9t031_ops = { |
4e96fd08 GL |
529 | .set_bus_param = mt9t031_set_bus_param, |
530 | .query_bus_param = mt9t031_query_bus_param, | |
531 | .controls = mt9t031_controls, | |
532 | .num_controls = ARRAY_SIZE(mt9t031_controls), | |
4e96fd08 GL |
533 | }; |
534 | ||
979ea1dd | 535 | static int mt9t031_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
4e96fd08 | 536 | { |
979ea1dd GL |
537 | struct i2c_client *client = sd->priv; |
538 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
4e96fd08 GL |
539 | int data; |
540 | ||
541 | switch (ctrl->id) { | |
542 | case V4L2_CID_VFLIP: | |
9538e1c2 | 543 | data = reg_read(client, MT9T031_READ_MODE_2); |
4e96fd08 GL |
544 | if (data < 0) |
545 | return -EIO; | |
546 | ctrl->value = !!(data & 0x8000); | |
547 | break; | |
548 | case V4L2_CID_HFLIP: | |
9538e1c2 | 549 | data = reg_read(client, MT9T031_READ_MODE_2); |
4e96fd08 GL |
550 | if (data < 0) |
551 | return -EIO; | |
552 | ctrl->value = !!(data & 0x4000); | |
553 | break; | |
554 | case V4L2_CID_EXPOSURE_AUTO: | |
555 | ctrl->value = mt9t031->autoexposure; | |
556 | break; | |
96c75399 GL |
557 | case V4L2_CID_GAIN: |
558 | ctrl->value = mt9t031->gain; | |
559 | break; | |
560 | case V4L2_CID_EXPOSURE: | |
561 | ctrl->value = mt9t031->exposure; | |
562 | break; | |
4e96fd08 GL |
563 | } |
564 | return 0; | |
565 | } | |
566 | ||
979ea1dd | 567 | static int mt9t031_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
4e96fd08 | 568 | { |
979ea1dd GL |
569 | struct i2c_client *client = sd->priv; |
570 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
571 | struct soc_camera_device *icd = client->dev.platform_data; | |
4e96fd08 GL |
572 | const struct v4l2_queryctrl *qctrl; |
573 | int data; | |
574 | ||
575 | qctrl = soc_camera_find_qctrl(&mt9t031_ops, ctrl->id); | |
576 | ||
577 | if (!qctrl) | |
578 | return -EINVAL; | |
579 | ||
580 | switch (ctrl->id) { | |
581 | case V4L2_CID_VFLIP: | |
582 | if (ctrl->value) | |
9538e1c2 | 583 | data = reg_set(client, MT9T031_READ_MODE_2, 0x8000); |
4e96fd08 | 584 | else |
9538e1c2 | 585 | data = reg_clear(client, MT9T031_READ_MODE_2, 0x8000); |
4e96fd08 GL |
586 | if (data < 0) |
587 | return -EIO; | |
588 | break; | |
589 | case V4L2_CID_HFLIP: | |
590 | if (ctrl->value) | |
9538e1c2 | 591 | data = reg_set(client, MT9T031_READ_MODE_2, 0x4000); |
4e96fd08 | 592 | else |
9538e1c2 | 593 | data = reg_clear(client, MT9T031_READ_MODE_2, 0x4000); |
4e96fd08 GL |
594 | if (data < 0) |
595 | return -EIO; | |
596 | break; | |
597 | case V4L2_CID_GAIN: | |
598 | if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum) | |
599 | return -EINVAL; | |
600 | /* See Datasheet Table 7, Gain settings. */ | |
601 | if (ctrl->value <= qctrl->default_value) { | |
602 | /* Pack it into 0..1 step 0.125, register values 0..8 */ | |
603 | unsigned long range = qctrl->default_value - qctrl->minimum; | |
604 | data = ((ctrl->value - qctrl->minimum) * 8 + range / 2) / range; | |
605 | ||
85f8be68 | 606 | dev_dbg(&client->dev, "Setting gain %d\n", data); |
9538e1c2 | 607 | data = reg_write(client, MT9T031_GLOBAL_GAIN, data); |
4e96fd08 GL |
608 | if (data < 0) |
609 | return -EIO; | |
610 | } else { | |
70e1d353 | 611 | /* Pack it into 1.125..128 variable step, register values 9..0x7860 */ |
4e96fd08 GL |
612 | /* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */ |
613 | unsigned long range = qctrl->maximum - qctrl->default_value - 1; | |
70e1d353 | 614 | /* calculated gain: map 65..127 to 9..1024 step 0.125 */ |
4e96fd08 | 615 | unsigned long gain = ((ctrl->value - qctrl->default_value - 1) * |
70e1d353 | 616 | 1015 + range / 2) / range + 9; |
4e96fd08 | 617 | |
70e1d353 | 618 | if (gain <= 32) /* calculated gain 9..32 -> 9..32 */ |
4e96fd08 | 619 | data = gain; |
70e1d353 | 620 | else if (gain <= 64) /* calculated gain 33..64 -> 0x51..0x60 */ |
4e96fd08 GL |
621 | data = ((gain - 32) * 16 + 16) / 32 + 80; |
622 | else | |
70e1d353 GL |
623 | /* calculated gain 65..1024 -> (1..120) << 8 + 0x60 */ |
624 | data = (((gain - 64 + 7) * 32) & 0xff00) | 0x60; | |
4e96fd08 | 625 | |
85f8be68 | 626 | dev_dbg(&client->dev, "Set gain from 0x%x to 0x%x\n", |
9538e1c2 GL |
627 | reg_read(client, MT9T031_GLOBAL_GAIN), data); |
628 | data = reg_write(client, MT9T031_GLOBAL_GAIN, data); | |
4e96fd08 GL |
629 | if (data < 0) |
630 | return -EIO; | |
631 | } | |
632 | ||
633 | /* Success */ | |
96c75399 | 634 | mt9t031->gain = ctrl->value; |
4e96fd08 GL |
635 | break; |
636 | case V4L2_CID_EXPOSURE: | |
637 | /* mt9t031 has maximum == default */ | |
638 | if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum) | |
639 | return -EINVAL; | |
640 | else { | |
641 | const unsigned long range = qctrl->maximum - qctrl->minimum; | |
642 | const u32 shutter = ((ctrl->value - qctrl->minimum) * 1048 + | |
643 | range / 2) / range + 1; | |
644 | u32 old; | |
645 | ||
9538e1c2 | 646 | get_shutter(client, &old); |
85f8be68 | 647 | dev_dbg(&client->dev, "Set shutter from %u to %u\n", |
4e96fd08 | 648 | old, shutter); |
9538e1c2 | 649 | if (set_shutter(client, shutter) < 0) |
4e96fd08 | 650 | return -EIO; |
96c75399 | 651 | mt9t031->exposure = ctrl->value; |
4e96fd08 GL |
652 | mt9t031->autoexposure = 0; |
653 | } | |
654 | break; | |
655 | case V4L2_CID_EXPOSURE_AUTO: | |
656 | if (ctrl->value) { | |
657 | const u16 vblank = MT9T031_VERTICAL_BLANK; | |
658 | const u32 shutter_max = MT9T031_MAX_HEIGHT + vblank; | |
96c75399 GL |
659 | unsigned int total_h = mt9t031->rect.height + |
660 | icd->y_skip_top + vblank; | |
661 | ||
662 | if (set_shutter(client, total_h) < 0) | |
4e96fd08 GL |
663 | return -EIO; |
664 | qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE); | |
96c75399 GL |
665 | mt9t031->exposure = (shutter_max / 2 + (total_h - 1) * |
666 | (qctrl->maximum - qctrl->minimum)) / | |
4e96fd08 GL |
667 | shutter_max + qctrl->minimum; |
668 | mt9t031->autoexposure = 1; | |
669 | } else | |
670 | mt9t031->autoexposure = 0; | |
671 | break; | |
672 | } | |
673 | return 0; | |
674 | } | |
675 | ||
676 | /* Interface active, can use i2c. If it fails, it can indeed mean, that | |
677 | * this wasn't our capture interface, so, we wait for the right one */ | |
979ea1dd | 678 | static int mt9t031_video_probe(struct i2c_client *client) |
4e96fd08 | 679 | { |
979ea1dd GL |
680 | struct soc_camera_device *icd = client->dev.platform_data; |
681 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
4e96fd08 | 682 | s32 data; |
a4c56fd8 | 683 | int ret; |
4e96fd08 | 684 | |
4e96fd08 | 685 | /* Enable the chip */ |
9538e1c2 | 686 | data = reg_write(client, MT9T031_CHIP_ENABLE, 1); |
85f8be68 | 687 | dev_dbg(&client->dev, "write: %d\n", data); |
4e96fd08 GL |
688 | |
689 | /* Read out the chip version register */ | |
9538e1c2 | 690 | data = reg_read(client, MT9T031_CHIP_VERSION); |
4e96fd08 GL |
691 | |
692 | switch (data) { | |
693 | case 0x1621: | |
694 | mt9t031->model = V4L2_IDENT_MT9T031; | |
695 | icd->formats = mt9t031_colour_formats; | |
696 | icd->num_formats = ARRAY_SIZE(mt9t031_colour_formats); | |
697 | break; | |
698 | default: | |
85f8be68 | 699 | dev_err(&client->dev, |
4e96fd08 | 700 | "No MT9T031 chip detected, register read %x\n", data); |
40e2e092 | 701 | return -ENODEV; |
4e96fd08 GL |
702 | } |
703 | ||
85f8be68 | 704 | dev_info(&client->dev, "Detected a MT9T031 chip ID %x\n", data); |
4e96fd08 | 705 | |
a4c56fd8 GL |
706 | ret = mt9t031_idle(client); |
707 | if (ret < 0) | |
708 | dev_err(&client->dev, "Failed to initialise the camera\n"); | |
709 | ||
96c75399 GL |
710 | /* mt9t031_idle() has reset the chip to default. */ |
711 | mt9t031->exposure = 255; | |
712 | mt9t031->gain = 64; | |
713 | ||
a4c56fd8 | 714 | return ret; |
4e96fd08 GL |
715 | } |
716 | ||
979ea1dd GL |
717 | static struct v4l2_subdev_core_ops mt9t031_subdev_core_ops = { |
718 | .g_ctrl = mt9t031_g_ctrl, | |
719 | .s_ctrl = mt9t031_s_ctrl, | |
720 | .g_chip_ident = mt9t031_g_chip_ident, | |
721 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
722 | .g_register = mt9t031_g_register, | |
723 | .s_register = mt9t031_s_register, | |
724 | #endif | |
725 | }; | |
726 | ||
727 | static struct v4l2_subdev_video_ops mt9t031_subdev_video_ops = { | |
728 | .s_stream = mt9t031_s_stream, | |
729 | .s_fmt = mt9t031_s_fmt, | |
6a6c8786 | 730 | .g_fmt = mt9t031_g_fmt, |
979ea1dd | 731 | .try_fmt = mt9t031_try_fmt, |
08590b96 | 732 | .s_crop = mt9t031_s_crop, |
6a6c8786 GL |
733 | .g_crop = mt9t031_g_crop, |
734 | .cropcap = mt9t031_cropcap, | |
979ea1dd GL |
735 | }; |
736 | ||
737 | static struct v4l2_subdev_ops mt9t031_subdev_ops = { | |
738 | .core = &mt9t031_subdev_core_ops, | |
739 | .video = &mt9t031_subdev_video_ops, | |
740 | }; | |
741 | ||
4e96fd08 GL |
742 | static int mt9t031_probe(struct i2c_client *client, |
743 | const struct i2c_device_id *did) | |
744 | { | |
745 | struct mt9t031 *mt9t031; | |
40e2e092 | 746 | struct soc_camera_device *icd = client->dev.platform_data; |
4e96fd08 | 747 | struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); |
40e2e092 | 748 | struct soc_camera_link *icl; |
4e96fd08 GL |
749 | int ret; |
750 | ||
40e2e092 GL |
751 | if (!icd) { |
752 | dev_err(&client->dev, "MT9T031: missing soc-camera data!\n"); | |
753 | return -EINVAL; | |
754 | } | |
755 | ||
756 | icl = to_soc_camera_link(icd); | |
4e96fd08 GL |
757 | if (!icl) { |
758 | dev_err(&client->dev, "MT9T031 driver needs platform data\n"); | |
759 | return -EINVAL; | |
760 | } | |
761 | ||
762 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) { | |
763 | dev_warn(&adapter->dev, | |
764 | "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n"); | |
765 | return -EIO; | |
766 | } | |
767 | ||
768 | mt9t031 = kzalloc(sizeof(struct mt9t031), GFP_KERNEL); | |
769 | if (!mt9t031) | |
770 | return -ENOMEM; | |
771 | ||
979ea1dd | 772 | v4l2_i2c_subdev_init(&mt9t031->subdev, client, &mt9t031_subdev_ops); |
4e96fd08 GL |
773 | |
774 | /* Second stage probe - when a capture adapter is there */ | |
a0705b07 | 775 | icd->ops = &mt9t031_ops; |
a0705b07 | 776 | icd->y_skip_top = 0; |
6a6c8786 GL |
777 | |
778 | mt9t031->rect.left = MT9T031_COLUMN_SKIP; | |
779 | mt9t031->rect.top = MT9T031_ROW_SKIP; | |
780 | mt9t031->rect.width = MT9T031_MAX_WIDTH; | |
781 | mt9t031->rect.height = MT9T031_MAX_HEIGHT; | |
782 | ||
4e96fd08 GL |
783 | /* Simulated autoexposure. If enabled, we calculate shutter width |
784 | * ourselves in the driver based on vertical blanking and frame width */ | |
785 | mt9t031->autoexposure = 1; | |
786 | ||
787 | mt9t031->xskip = 1; | |
788 | mt9t031->yskip = 1; | |
789 | ||
979ea1dd GL |
790 | mt9t031_idle(client); |
791 | ||
792 | ret = mt9t031_video_probe(client); | |
793 | ||
794 | mt9t031_disable(client); | |
795 | ||
40e2e092 GL |
796 | if (ret) { |
797 | icd->ops = NULL; | |
798 | i2c_set_clientdata(client, NULL); | |
799 | kfree(mt9t031); | |
800 | } | |
4e96fd08 | 801 | |
4e96fd08 GL |
802 | return ret; |
803 | } | |
804 | ||
805 | static int mt9t031_remove(struct i2c_client *client) | |
806 | { | |
979ea1dd | 807 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
40e2e092 | 808 | struct soc_camera_device *icd = client->dev.platform_data; |
4e96fd08 | 809 | |
40e2e092 | 810 | icd->ops = NULL; |
4e96fd08 | 811 | i2c_set_clientdata(client, NULL); |
40e2e092 | 812 | client->driver = NULL; |
4e96fd08 GL |
813 | kfree(mt9t031); |
814 | ||
815 | return 0; | |
816 | } | |
817 | ||
818 | static const struct i2c_device_id mt9t031_id[] = { | |
819 | { "mt9t031", 0 }, | |
820 | { } | |
821 | }; | |
822 | MODULE_DEVICE_TABLE(i2c, mt9t031_id); | |
823 | ||
824 | static struct i2c_driver mt9t031_i2c_driver = { | |
825 | .driver = { | |
826 | .name = "mt9t031", | |
827 | }, | |
828 | .probe = mt9t031_probe, | |
829 | .remove = mt9t031_remove, | |
830 | .id_table = mt9t031_id, | |
831 | }; | |
832 | ||
833 | static int __init mt9t031_mod_init(void) | |
834 | { | |
835 | return i2c_add_driver(&mt9t031_i2c_driver); | |
836 | } | |
837 | ||
838 | static void __exit mt9t031_mod_exit(void) | |
839 | { | |
840 | i2c_del_driver(&mt9t031_i2c_driver); | |
841 | } | |
842 | ||
843 | module_init(mt9t031_mod_init); | |
844 | module_exit(mt9t031_mod_exit); | |
845 | ||
846 | MODULE_DESCRIPTION("Micron MT9T031 Camera driver"); | |
847 | MODULE_AUTHOR("Guennadi Liakhovetski <lg@denx.de>"); | |
848 | MODULE_LICENSE("GPL v2"); |