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; | |
6a6c8786 | 76 | unsigned char autoexposure; |
4e96fd08 GL |
77 | }; |
78 | ||
979ea1dd GL |
79 | static struct mt9t031 *to_mt9t031(const struct i2c_client *client) |
80 | { | |
81 | return container_of(i2c_get_clientdata(client), struct mt9t031, subdev); | |
82 | } | |
83 | ||
9538e1c2 | 84 | static int reg_read(struct i2c_client *client, const u8 reg) |
4e96fd08 | 85 | { |
4e96fd08 GL |
86 | s32 data = i2c_smbus_read_word_data(client, reg); |
87 | return data < 0 ? data : swab16(data); | |
88 | } | |
89 | ||
9538e1c2 | 90 | static int reg_write(struct i2c_client *client, const u8 reg, |
4e96fd08 GL |
91 | const u16 data) |
92 | { | |
9538e1c2 | 93 | return i2c_smbus_write_word_data(client, reg, swab16(data)); |
4e96fd08 GL |
94 | } |
95 | ||
9538e1c2 | 96 | static int reg_set(struct i2c_client *client, const u8 reg, |
4e96fd08 GL |
97 | const u16 data) |
98 | { | |
99 | int ret; | |
100 | ||
9538e1c2 | 101 | ret = reg_read(client, reg); |
4e96fd08 GL |
102 | if (ret < 0) |
103 | return ret; | |
9538e1c2 | 104 | return reg_write(client, reg, ret | data); |
4e96fd08 GL |
105 | } |
106 | ||
9538e1c2 | 107 | static int reg_clear(struct i2c_client *client, const u8 reg, |
4e96fd08 GL |
108 | const u16 data) |
109 | { | |
110 | int ret; | |
111 | ||
9538e1c2 | 112 | ret = reg_read(client, reg); |
4e96fd08 GL |
113 | if (ret < 0) |
114 | return ret; | |
9538e1c2 | 115 | return reg_write(client, reg, ret & ~data); |
4e96fd08 GL |
116 | } |
117 | ||
9538e1c2 | 118 | static int set_shutter(struct i2c_client *client, const u32 data) |
4e96fd08 GL |
119 | { |
120 | int ret; | |
121 | ||
9538e1c2 | 122 | ret = reg_write(client, MT9T031_SHUTTER_WIDTH_UPPER, data >> 16); |
4e96fd08 GL |
123 | |
124 | if (ret >= 0) | |
9538e1c2 | 125 | ret = reg_write(client, MT9T031_SHUTTER_WIDTH, data & 0xffff); |
4e96fd08 GL |
126 | |
127 | return ret; | |
128 | } | |
129 | ||
9538e1c2 | 130 | static int get_shutter(struct i2c_client *client, u32 *data) |
4e96fd08 GL |
131 | { |
132 | int ret; | |
133 | ||
9538e1c2 | 134 | ret = reg_read(client, MT9T031_SHUTTER_WIDTH_UPPER); |
4e96fd08 GL |
135 | *data = ret << 16; |
136 | ||
137 | if (ret >= 0) | |
9538e1c2 | 138 | ret = reg_read(client, MT9T031_SHUTTER_WIDTH); |
4e96fd08 GL |
139 | *data |= ret & 0xffff; |
140 | ||
141 | return ret < 0 ? ret : 0; | |
142 | } | |
143 | ||
979ea1dd | 144 | static int mt9t031_idle(struct i2c_client *client) |
4e96fd08 GL |
145 | { |
146 | int ret; | |
147 | ||
148 | /* Disable chip output, synchronous option update */ | |
9538e1c2 | 149 | ret = reg_write(client, MT9T031_RESET, 1); |
4e96fd08 | 150 | if (ret >= 0) |
9538e1c2 | 151 | ret = reg_write(client, MT9T031_RESET, 0); |
4e96fd08 | 152 | if (ret >= 0) |
9538e1c2 | 153 | ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 2); |
4e96fd08 GL |
154 | |
155 | return ret >= 0 ? 0 : -EIO; | |
156 | } | |
157 | ||
979ea1dd | 158 | static int mt9t031_disable(struct i2c_client *client) |
4e96fd08 GL |
159 | { |
160 | /* Disable the chip */ | |
9538e1c2 | 161 | reg_clear(client, MT9T031_OUTPUT_CONTROL, 2); |
f9826514 | 162 | |
4e96fd08 GL |
163 | return 0; |
164 | } | |
165 | ||
979ea1dd | 166 | static int mt9t031_init(struct soc_camera_device *icd) |
4e96fd08 | 167 | { |
40e2e092 | 168 | struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd)); |
9538e1c2 | 169 | |
979ea1dd | 170 | return mt9t031_idle(client); |
4e96fd08 GL |
171 | } |
172 | ||
979ea1dd | 173 | static int mt9t031_release(struct soc_camera_device *icd) |
4e96fd08 | 174 | { |
40e2e092 | 175 | struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd)); |
9538e1c2 | 176 | |
979ea1dd GL |
177 | return mt9t031_disable(client); |
178 | } | |
179 | ||
180 | static int mt9t031_s_stream(struct v4l2_subdev *sd, int enable) | |
181 | { | |
182 | struct i2c_client *client = sd->priv; | |
183 | int ret; | |
184 | ||
185 | if (enable) | |
186 | /* Switch to master "normal" mode */ | |
187 | ret = reg_set(client, MT9T031_OUTPUT_CONTROL, 2); | |
188 | else | |
189 | /* Stop sensor readout */ | |
190 | ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 2); | |
191 | ||
192 | if (ret < 0) | |
4e96fd08 | 193 | return -EIO; |
979ea1dd | 194 | |
4e96fd08 GL |
195 | return 0; |
196 | } | |
197 | ||
198 | static int mt9t031_set_bus_param(struct soc_camera_device *icd, | |
199 | unsigned long flags) | |
200 | { | |
40e2e092 | 201 | struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd)); |
9538e1c2 | 202 | |
4e96fd08 GL |
203 | /* The caller should have queried our parameters, check anyway */ |
204 | if (flags & ~MT9T031_BUS_PARAM) | |
205 | return -EINVAL; | |
206 | ||
207 | if (flags & SOCAM_PCLK_SAMPLE_FALLING) | |
9538e1c2 | 208 | reg_clear(client, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000); |
c98afbfc | 209 | else |
9538e1c2 | 210 | reg_set(client, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000); |
4e96fd08 GL |
211 | |
212 | return 0; | |
213 | } | |
214 | ||
215 | static unsigned long mt9t031_query_bus_param(struct soc_camera_device *icd) | |
216 | { | |
40e2e092 | 217 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
4e96fd08 GL |
218 | |
219 | return soc_camera_apply_sensor_flags(icl, MT9T031_BUS_PARAM); | |
220 | } | |
221 | ||
6a6c8786 GL |
222 | /* target must be _even_ */ |
223 | static u16 mt9t031_skip(s32 *source, s32 target, s32 max) | |
70e1d353 | 224 | { |
6a6c8786 GL |
225 | unsigned int skip; |
226 | ||
227 | if (*source < target + target / 2) { | |
228 | *source = target; | |
229 | return 1; | |
230 | } | |
231 | ||
232 | skip = min(max, *source + target / 2) / target; | |
233 | if (skip > 8) | |
234 | skip = 8; | |
235 | *source = target * skip; | |
236 | ||
237 | return skip; | |
70e1d353 GL |
238 | } |
239 | ||
6a6c8786 | 240 | /* rect is the sensor rectangle, the caller guarantees parameter validity */ |
09e231b3 GL |
241 | static int mt9t031_set_params(struct soc_camera_device *icd, |
242 | struct v4l2_rect *rect, u16 xskip, u16 yskip) | |
4e96fd08 | 243 | { |
40e2e092 | 244 | struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd)); |
979ea1dd | 245 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
4e96fd08 | 246 | int ret; |
6a6c8786 | 247 | u16 xbin, ybin; |
4e96fd08 GL |
248 | const u16 hblank = MT9T031_HORIZONTAL_BLANK, |
249 | vblank = MT9T031_VERTICAL_BLANK; | |
4e96fd08 GL |
250 | |
251 | xbin = min(xskip, (u16)3); | |
252 | ybin = min(yskip, (u16)3); | |
253 | ||
6a6c8786 GL |
254 | /* |
255 | * Could just do roundup(rect->left, [xy]bin * 2); but this is cheaper. | |
256 | * There is always a valid suitably aligned value. The worst case is | |
257 | * xbin = 3, width = 2048. Then we will start at 36, the last read out | |
258 | * pixel will be 2083, which is < 2085 - first black pixel. | |
259 | * | |
260 | * MT9T031 datasheet imposes window left border alignment, depending on | |
261 | * the selected xskip. Failing to conform to this requirement produces | |
262 | * dark horizontal stripes in the image. However, even obeying to this | |
263 | * requirement doesn't eliminate the stripes in all configurations. They | |
264 | * appear "locally reproducibly," but can differ between tests under | |
265 | * different lighting conditions. | |
266 | */ | |
4e96fd08 | 267 | switch (xbin) { |
6a6c8786 GL |
268 | case 1: |
269 | rect->left &= ~1; | |
4e96fd08 | 270 | break; |
4e96fd08 | 271 | case 2: |
6a6c8786 | 272 | rect->left &= ~3; |
4e96fd08 GL |
273 | break; |
274 | case 3: | |
6a6c8786 GL |
275 | rect->left = rect->left > roundup(MT9T031_COLUMN_SKIP, 6) ? |
276 | (rect->left / 6) * 6 : roundup(MT9T031_COLUMN_SKIP, 6); | |
4e96fd08 GL |
277 | } |
278 | ||
6a6c8786 GL |
279 | rect->top &= ~1; |
280 | ||
281 | dev_dbg(&client->dev, "skip %u:%u, rect %ux%u@%u:%u\n", | |
282 | xskip, yskip, rect->width, rect->height, rect->left, rect->top); | |
283 | ||
70e1d353 | 284 | /* Disable register update, reconfigure atomically */ |
9538e1c2 | 285 | ret = reg_set(client, MT9T031_OUTPUT_CONTROL, 1); |
70e1d353 GL |
286 | if (ret < 0) |
287 | return ret; | |
288 | ||
4e96fd08 | 289 | /* Blanking and start values - default... */ |
9538e1c2 | 290 | ret = reg_write(client, MT9T031_HORIZONTAL_BLANKING, hblank); |
4e96fd08 | 291 | if (ret >= 0) |
9538e1c2 | 292 | ret = reg_write(client, MT9T031_VERTICAL_BLANKING, vblank); |
4e96fd08 | 293 | |
09e231b3 | 294 | if (yskip != mt9t031->yskip || xskip != mt9t031->xskip) { |
4e96fd08 GL |
295 | /* Binning, skipping */ |
296 | if (ret >= 0) | |
9538e1c2 | 297 | ret = reg_write(client, MT9T031_COLUMN_ADDRESS_MODE, |
4e96fd08 GL |
298 | ((xbin - 1) << 4) | (xskip - 1)); |
299 | if (ret >= 0) | |
9538e1c2 | 300 | ret = reg_write(client, MT9T031_ROW_ADDRESS_MODE, |
4e96fd08 GL |
301 | ((ybin - 1) << 4) | (yskip - 1)); |
302 | } | |
6a6c8786 GL |
303 | dev_dbg(&client->dev, "new physical left %u, top %u\n", |
304 | rect->left, rect->top); | |
4e96fd08 GL |
305 | |
306 | /* The caller provides a supported format, as guaranteed by | |
307 | * icd->try_fmt_cap(), soc_camera_s_crop() and soc_camera_cropcap() */ | |
308 | if (ret >= 0) | |
6a6c8786 | 309 | ret = reg_write(client, MT9T031_COLUMN_START, rect->left); |
4e96fd08 | 310 | if (ret >= 0) |
6a6c8786 | 311 | ret = reg_write(client, MT9T031_ROW_START, rect->top); |
4e96fd08 | 312 | if (ret >= 0) |
6a6c8786 | 313 | ret = reg_write(client, MT9T031_WINDOW_WIDTH, rect->width - 1); |
4e96fd08 | 314 | if (ret >= 0) |
9538e1c2 | 315 | ret = reg_write(client, MT9T031_WINDOW_HEIGHT, |
6a6c8786 | 316 | rect->height + icd->y_skip_top - 1); |
4e96fd08 | 317 | if (ret >= 0 && mt9t031->autoexposure) { |
6a6c8786 GL |
318 | ret = set_shutter(client, |
319 | rect->height + icd->y_skip_top + vblank); | |
4e96fd08 GL |
320 | if (ret >= 0) { |
321 | const u32 shutter_max = MT9T031_MAX_HEIGHT + vblank; | |
322 | const struct v4l2_queryctrl *qctrl = | |
323 | soc_camera_find_qctrl(icd->ops, | |
324 | V4L2_CID_EXPOSURE); | |
6a6c8786 | 325 | icd->exposure = (shutter_max / 2 + (rect->height + |
4e96fd08 GL |
326 | icd->y_skip_top + vblank - 1) * |
327 | (qctrl->maximum - qctrl->minimum)) / | |
328 | shutter_max + qctrl->minimum; | |
329 | } | |
330 | } | |
331 | ||
09e231b3 GL |
332 | /* Re-enable register update, commit all changes */ |
333 | if (ret >= 0) | |
9538e1c2 | 334 | ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 1); |
09e231b3 | 335 | |
6a6c8786 GL |
336 | if (ret >= 0) { |
337 | mt9t031->rect = *rect; | |
338 | mt9t031->xskip = xskip; | |
339 | mt9t031->yskip = yskip; | |
340 | } | |
341 | ||
09e231b3 GL |
342 | return ret < 0 ? ret : 0; |
343 | } | |
344 | ||
08590b96 | 345 | static int mt9t031_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) |
09e231b3 | 346 | { |
6a6c8786 | 347 | struct v4l2_rect rect = a->c; |
08590b96 | 348 | struct i2c_client *client = sd->priv; |
979ea1dd | 349 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
08590b96 | 350 | struct soc_camera_device *icd = client->dev.platform_data; |
09e231b3 | 351 | |
6a6c8786 GL |
352 | rect.width = ALIGN(rect.width, 2); |
353 | rect.height = ALIGN(rect.height, 2); | |
354 | ||
355 | soc_camera_limit_side(&rect.left, &rect.width, | |
356 | MT9T031_COLUMN_SKIP, MT9T031_MIN_WIDTH, MT9T031_MAX_WIDTH); | |
357 | ||
358 | soc_camera_limit_side(&rect.top, &rect.height, | |
359 | MT9T031_ROW_SKIP, MT9T031_MIN_HEIGHT, MT9T031_MAX_HEIGHT); | |
360 | ||
361 | return mt9t031_set_params(icd, &rect, mt9t031->xskip, mt9t031->yskip); | |
362 | } | |
363 | ||
364 | static int mt9t031_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) | |
365 | { | |
366 | struct i2c_client *client = sd->priv; | |
367 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
368 | ||
369 | a->c = mt9t031->rect; | |
370 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
e330919a | 371 | |
6a6c8786 GL |
372 | return 0; |
373 | } | |
374 | ||
375 | static int mt9t031_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a) | |
376 | { | |
377 | a->bounds.left = MT9T031_COLUMN_SKIP; | |
378 | a->bounds.top = MT9T031_ROW_SKIP; | |
379 | a->bounds.width = MT9T031_MAX_WIDTH; | |
380 | a->bounds.height = MT9T031_MAX_HEIGHT; | |
381 | a->defrect = a->bounds; | |
382 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
383 | a->pixelaspect.numerator = 1; | |
384 | a->pixelaspect.denominator = 1; | |
e330919a | 385 | |
6a6c8786 GL |
386 | return 0; |
387 | } | |
388 | ||
389 | static int mt9t031_g_fmt(struct v4l2_subdev *sd, struct v4l2_format *f) | |
390 | { | |
391 | struct i2c_client *client = sd->priv; | |
392 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
393 | struct v4l2_pix_format *pix = &f->fmt.pix; | |
394 | ||
395 | pix->width = mt9t031->rect.width / mt9t031->xskip; | |
396 | pix->height = mt9t031->rect.height / mt9t031->yskip; | |
397 | pix->pixelformat = V4L2_PIX_FMT_SGRBG10; | |
398 | pix->field = V4L2_FIELD_NONE; | |
399 | pix->colorspace = V4L2_COLORSPACE_SRGB; | |
400 | ||
401 | return 0; | |
09e231b3 GL |
402 | } |
403 | ||
979ea1dd | 404 | static int mt9t031_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *f) |
09e231b3 | 405 | { |
979ea1dd GL |
406 | struct i2c_client *client = sd->priv; |
407 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
408 | struct soc_camera_device *icd = client->dev.platform_data; | |
6a6c8786 | 409 | struct v4l2_pix_format *pix = &f->fmt.pix; |
09e231b3 | 410 | u16 xskip, yskip; |
6a6c8786 | 411 | struct v4l2_rect rect = mt9t031->rect; |
09e231b3 GL |
412 | |
413 | /* | |
6a6c8786 GL |
414 | * try_fmt has put width and height within limits. |
415 | * S_FMT: use binning and skipping for scaling | |
09e231b3 | 416 | */ |
6a6c8786 GL |
417 | xskip = mt9t031_skip(&rect.width, pix->width, MT9T031_MAX_WIDTH); |
418 | yskip = mt9t031_skip(&rect.height, pix->height, MT9T031_MAX_HEIGHT); | |
4e96fd08 | 419 | |
6a6c8786 GL |
420 | /* mt9t031_set_params() doesn't change width and height */ |
421 | return mt9t031_set_params(icd, &rect, xskip, yskip); | |
4e96fd08 GL |
422 | } |
423 | ||
6a6c8786 GL |
424 | /* |
425 | * If a user window larger than sensor window is requested, we'll increase the | |
426 | * sensor window. | |
427 | */ | |
979ea1dd | 428 | static int mt9t031_try_fmt(struct v4l2_subdev *sd, struct v4l2_format *f) |
4e96fd08 GL |
429 | { |
430 | struct v4l2_pix_format *pix = &f->fmt.pix; | |
431 | ||
653dc59b TP |
432 | v4l_bound_align_image( |
433 | &pix->width, MT9T031_MIN_WIDTH, MT9T031_MAX_WIDTH, 1, | |
434 | &pix->height, MT9T031_MIN_HEIGHT, MT9T031_MAX_HEIGHT, 1, 0); | |
4e96fd08 GL |
435 | |
436 | return 0; | |
437 | } | |
438 | ||
979ea1dd GL |
439 | static int mt9t031_g_chip_ident(struct v4l2_subdev *sd, |
440 | struct v4l2_dbg_chip_ident *id) | |
4e96fd08 | 441 | { |
979ea1dd GL |
442 | struct i2c_client *client = sd->priv; |
443 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
4e96fd08 | 444 | |
aecde8b5 | 445 | if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR) |
4e96fd08 GL |
446 | return -EINVAL; |
447 | ||
40e2e092 | 448 | if (id->match.addr != client->addr) |
4e96fd08 GL |
449 | return -ENODEV; |
450 | ||
451 | id->ident = mt9t031->model; | |
452 | id->revision = 0; | |
453 | ||
454 | return 0; | |
455 | } | |
456 | ||
457 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
979ea1dd GL |
458 | static int mt9t031_g_register(struct v4l2_subdev *sd, |
459 | struct v4l2_dbg_register *reg) | |
4e96fd08 | 460 | { |
979ea1dd | 461 | struct i2c_client *client = sd->priv; |
4e96fd08 | 462 | |
aecde8b5 | 463 | if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) |
4e96fd08 GL |
464 | return -EINVAL; |
465 | ||
9538e1c2 | 466 | if (reg->match.addr != client->addr) |
4e96fd08 GL |
467 | return -ENODEV; |
468 | ||
9538e1c2 | 469 | reg->val = reg_read(client, reg->reg); |
4e96fd08 GL |
470 | |
471 | if (reg->val > 0xffff) | |
472 | return -EIO; | |
473 | ||
474 | return 0; | |
475 | } | |
476 | ||
979ea1dd GL |
477 | static int mt9t031_s_register(struct v4l2_subdev *sd, |
478 | struct v4l2_dbg_register *reg) | |
4e96fd08 | 479 | { |
979ea1dd | 480 | struct i2c_client *client = sd->priv; |
4e96fd08 | 481 | |
aecde8b5 | 482 | if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) |
4e96fd08 GL |
483 | return -EINVAL; |
484 | ||
9538e1c2 | 485 | if (reg->match.addr != client->addr) |
4e96fd08 GL |
486 | return -ENODEV; |
487 | ||
9538e1c2 | 488 | if (reg_write(client, reg->reg, reg->val) < 0) |
4e96fd08 GL |
489 | return -EIO; |
490 | ||
491 | return 0; | |
492 | } | |
493 | #endif | |
494 | ||
495 | static const struct v4l2_queryctrl mt9t031_controls[] = { | |
496 | { | |
497 | .id = V4L2_CID_VFLIP, | |
498 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
499 | .name = "Flip Vertically", | |
500 | .minimum = 0, | |
501 | .maximum = 1, | |
502 | .step = 1, | |
503 | .default_value = 0, | |
70e1d353 GL |
504 | }, { |
505 | .id = V4L2_CID_HFLIP, | |
506 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
507 | .name = "Flip Horizontally", | |
508 | .minimum = 0, | |
509 | .maximum = 1, | |
510 | .step = 1, | |
511 | .default_value = 0, | |
4e96fd08 GL |
512 | }, { |
513 | .id = V4L2_CID_GAIN, | |
514 | .type = V4L2_CTRL_TYPE_INTEGER, | |
515 | .name = "Gain", | |
516 | .minimum = 0, | |
517 | .maximum = 127, | |
518 | .step = 1, | |
519 | .default_value = 64, | |
520 | .flags = V4L2_CTRL_FLAG_SLIDER, | |
521 | }, { | |
522 | .id = V4L2_CID_EXPOSURE, | |
523 | .type = V4L2_CTRL_TYPE_INTEGER, | |
524 | .name = "Exposure", | |
525 | .minimum = 1, | |
526 | .maximum = 255, | |
527 | .step = 1, | |
528 | .default_value = 255, | |
529 | .flags = V4L2_CTRL_FLAG_SLIDER, | |
530 | }, { | |
531 | .id = V4L2_CID_EXPOSURE_AUTO, | |
532 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
533 | .name = "Automatic Exposure", | |
534 | .minimum = 0, | |
535 | .maximum = 1, | |
536 | .step = 1, | |
537 | .default_value = 1, | |
538 | } | |
539 | }; | |
540 | ||
4e96fd08 | 541 | static struct soc_camera_ops mt9t031_ops = { |
4e96fd08 GL |
542 | .init = mt9t031_init, |
543 | .release = mt9t031_release, | |
4e96fd08 GL |
544 | .set_bus_param = mt9t031_set_bus_param, |
545 | .query_bus_param = mt9t031_query_bus_param, | |
546 | .controls = mt9t031_controls, | |
547 | .num_controls = ARRAY_SIZE(mt9t031_controls), | |
4e96fd08 GL |
548 | }; |
549 | ||
979ea1dd | 550 | static int mt9t031_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
4e96fd08 | 551 | { |
979ea1dd GL |
552 | struct i2c_client *client = sd->priv; |
553 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
4e96fd08 GL |
554 | int data; |
555 | ||
556 | switch (ctrl->id) { | |
557 | case V4L2_CID_VFLIP: | |
9538e1c2 | 558 | data = reg_read(client, MT9T031_READ_MODE_2); |
4e96fd08 GL |
559 | if (data < 0) |
560 | return -EIO; | |
561 | ctrl->value = !!(data & 0x8000); | |
562 | break; | |
563 | case V4L2_CID_HFLIP: | |
9538e1c2 | 564 | data = reg_read(client, MT9T031_READ_MODE_2); |
4e96fd08 GL |
565 | if (data < 0) |
566 | return -EIO; | |
567 | ctrl->value = !!(data & 0x4000); | |
568 | break; | |
569 | case V4L2_CID_EXPOSURE_AUTO: | |
570 | ctrl->value = mt9t031->autoexposure; | |
571 | break; | |
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); | |
580 | struct soc_camera_device *icd = client->dev.platform_data; | |
4e96fd08 GL |
581 | const struct v4l2_queryctrl *qctrl; |
582 | int data; | |
583 | ||
584 | qctrl = soc_camera_find_qctrl(&mt9t031_ops, ctrl->id); | |
585 | ||
586 | if (!qctrl) | |
587 | return -EINVAL; | |
588 | ||
589 | switch (ctrl->id) { | |
590 | case V4L2_CID_VFLIP: | |
591 | if (ctrl->value) | |
9538e1c2 | 592 | data = reg_set(client, MT9T031_READ_MODE_2, 0x8000); |
4e96fd08 | 593 | else |
9538e1c2 | 594 | data = reg_clear(client, MT9T031_READ_MODE_2, 0x8000); |
4e96fd08 GL |
595 | if (data < 0) |
596 | return -EIO; | |
597 | break; | |
598 | case V4L2_CID_HFLIP: | |
599 | if (ctrl->value) | |
9538e1c2 | 600 | data = reg_set(client, MT9T031_READ_MODE_2, 0x4000); |
4e96fd08 | 601 | else |
9538e1c2 | 602 | data = reg_clear(client, MT9T031_READ_MODE_2, 0x4000); |
4e96fd08 GL |
603 | if (data < 0) |
604 | return -EIO; | |
605 | break; | |
606 | case V4L2_CID_GAIN: | |
607 | if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum) | |
608 | return -EINVAL; | |
609 | /* See Datasheet Table 7, Gain settings. */ | |
610 | if (ctrl->value <= qctrl->default_value) { | |
611 | /* Pack it into 0..1 step 0.125, register values 0..8 */ | |
612 | unsigned long range = qctrl->default_value - qctrl->minimum; | |
613 | data = ((ctrl->value - qctrl->minimum) * 8 + range / 2) / range; | |
614 | ||
85f8be68 | 615 | dev_dbg(&client->dev, "Setting gain %d\n", data); |
9538e1c2 | 616 | data = reg_write(client, MT9T031_GLOBAL_GAIN, data); |
4e96fd08 GL |
617 | if (data < 0) |
618 | return -EIO; | |
619 | } else { | |
70e1d353 | 620 | /* Pack it into 1.125..128 variable step, register values 9..0x7860 */ |
4e96fd08 GL |
621 | /* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */ |
622 | unsigned long range = qctrl->maximum - qctrl->default_value - 1; | |
70e1d353 | 623 | /* calculated gain: map 65..127 to 9..1024 step 0.125 */ |
4e96fd08 | 624 | unsigned long gain = ((ctrl->value - qctrl->default_value - 1) * |
70e1d353 | 625 | 1015 + range / 2) / range + 9; |
4e96fd08 | 626 | |
70e1d353 | 627 | if (gain <= 32) /* calculated gain 9..32 -> 9..32 */ |
4e96fd08 | 628 | data = gain; |
70e1d353 | 629 | else if (gain <= 64) /* calculated gain 33..64 -> 0x51..0x60 */ |
4e96fd08 GL |
630 | data = ((gain - 32) * 16 + 16) / 32 + 80; |
631 | else | |
70e1d353 GL |
632 | /* calculated gain 65..1024 -> (1..120) << 8 + 0x60 */ |
633 | data = (((gain - 64 + 7) * 32) & 0xff00) | 0x60; | |
4e96fd08 | 634 | |
85f8be68 | 635 | dev_dbg(&client->dev, "Set gain from 0x%x to 0x%x\n", |
9538e1c2 GL |
636 | reg_read(client, MT9T031_GLOBAL_GAIN), data); |
637 | data = reg_write(client, MT9T031_GLOBAL_GAIN, data); | |
4e96fd08 GL |
638 | if (data < 0) |
639 | return -EIO; | |
640 | } | |
641 | ||
642 | /* Success */ | |
643 | icd->gain = ctrl->value; | |
644 | break; | |
645 | case V4L2_CID_EXPOSURE: | |
646 | /* mt9t031 has maximum == default */ | |
647 | if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum) | |
648 | return -EINVAL; | |
649 | else { | |
650 | const unsigned long range = qctrl->maximum - qctrl->minimum; | |
651 | const u32 shutter = ((ctrl->value - qctrl->minimum) * 1048 + | |
652 | range / 2) / range + 1; | |
653 | u32 old; | |
654 | ||
9538e1c2 | 655 | get_shutter(client, &old); |
85f8be68 | 656 | dev_dbg(&client->dev, "Set shutter from %u to %u\n", |
4e96fd08 | 657 | old, shutter); |
9538e1c2 | 658 | if (set_shutter(client, shutter) < 0) |
4e96fd08 GL |
659 | return -EIO; |
660 | icd->exposure = ctrl->value; | |
661 | mt9t031->autoexposure = 0; | |
662 | } | |
663 | break; | |
664 | case V4L2_CID_EXPOSURE_AUTO: | |
665 | if (ctrl->value) { | |
666 | const u16 vblank = MT9T031_VERTICAL_BLANK; | |
667 | const u32 shutter_max = MT9T031_MAX_HEIGHT + vblank; | |
6a6c8786 | 668 | if (set_shutter(client, mt9t031->rect.height + |
4e96fd08 GL |
669 | icd->y_skip_top + vblank) < 0) |
670 | return -EIO; | |
671 | qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE); | |
a0705b07 | 672 | icd->exposure = (shutter_max / 2 + |
6a6c8786 | 673 | (mt9t031->rect.height + |
a0705b07 | 674 | icd->y_skip_top + vblank - 1) * |
4e96fd08 GL |
675 | (qctrl->maximum - qctrl->minimum)) / |
676 | shutter_max + qctrl->minimum; | |
677 | mt9t031->autoexposure = 1; | |
678 | } else | |
679 | mt9t031->autoexposure = 0; | |
680 | break; | |
681 | } | |
682 | return 0; | |
683 | } | |
684 | ||
685 | /* Interface active, can use i2c. If it fails, it can indeed mean, that | |
686 | * this wasn't our capture interface, so, we wait for the right one */ | |
979ea1dd | 687 | static int mt9t031_video_probe(struct i2c_client *client) |
4e96fd08 | 688 | { |
979ea1dd GL |
689 | struct soc_camera_device *icd = client->dev.platform_data; |
690 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
4e96fd08 | 691 | s32 data; |
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; | |
703 | icd->formats = mt9t031_colour_formats; | |
704 | icd->num_formats = ARRAY_SIZE(mt9t031_colour_formats); | |
705 | break; | |
706 | default: | |
85f8be68 | 707 | dev_err(&client->dev, |
4e96fd08 | 708 | "No MT9T031 chip detected, register read %x\n", data); |
40e2e092 | 709 | return -ENODEV; |
4e96fd08 GL |
710 | } |
711 | ||
85f8be68 | 712 | dev_info(&client->dev, "Detected a MT9T031 chip ID %x\n", data); |
4e96fd08 | 713 | |
4e96fd08 | 714 | return 0; |
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"); |