Commit | Line | Data |
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4e96fd08 GL |
1 | /* |
2 | * Driver for MT9T031 CMOS Image Sensor from Micron | |
3 | * | |
4 | * Copyright (C) 2008, Guennadi Liakhovetski, DENX Software Engineering <lg@denx.de> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | ||
535653b1 | 11 | #include <linux/device.h> |
4e96fd08 GL |
12 | #include <linux/i2c.h> |
13 | #include <linux/log2.h> | |
535653b1 VL |
14 | #include <linux/pm.h> |
15 | #include <linux/slab.h> | |
95d20109 | 16 | #include <linux/v4l2-mediabus.h> |
535653b1 | 17 | #include <linux/videodev2.h> |
7a707b89 | 18 | #include <linux/module.h> |
4e96fd08 | 19 | |
4e96fd08 | 20 | #include <media/soc_camera.h> |
9aea470b | 21 | #include <media/v4l2-clk.h> |
535653b1 | 22 | #include <media/v4l2-subdev.h> |
41efcd7a | 23 | #include <media/v4l2-ctrls.h> |
4e96fd08 | 24 | |
2f0babb7 GL |
25 | /* |
26 | * ATTENTION: this driver still cannot be used outside of the soc-camera | |
27 | * framework because of its PM implementation, using the video_device node. | |
28 | * If hardware becomes available for testing, alternative PM approaches shall | |
29 | * be considered and tested. | |
30 | */ | |
31 | ||
5d28d525 GL |
32 | /* |
33 | * mt9t031 i2c address 0x5d | |
25a34811 GL |
34 | * The platform has to define struct i2c_board_info objects and link to them |
35 | * from struct soc_camera_host_desc | |
5d28d525 | 36 | */ |
4e96fd08 GL |
37 | |
38 | /* mt9t031 selected register addresses */ | |
39 | #define MT9T031_CHIP_VERSION 0x00 | |
40 | #define MT9T031_ROW_START 0x01 | |
41 | #define MT9T031_COLUMN_START 0x02 | |
42 | #define MT9T031_WINDOW_HEIGHT 0x03 | |
43 | #define MT9T031_WINDOW_WIDTH 0x04 | |
44 | #define MT9T031_HORIZONTAL_BLANKING 0x05 | |
45 | #define MT9T031_VERTICAL_BLANKING 0x06 | |
46 | #define MT9T031_OUTPUT_CONTROL 0x07 | |
47 | #define MT9T031_SHUTTER_WIDTH_UPPER 0x08 | |
48 | #define MT9T031_SHUTTER_WIDTH 0x09 | |
49 | #define MT9T031_PIXEL_CLOCK_CONTROL 0x0a | |
50 | #define MT9T031_FRAME_RESTART 0x0b | |
51 | #define MT9T031_SHUTTER_DELAY 0x0c | |
52 | #define MT9T031_RESET 0x0d | |
53 | #define MT9T031_READ_MODE_1 0x1e | |
54 | #define MT9T031_READ_MODE_2 0x20 | |
55 | #define MT9T031_READ_MODE_3 0x21 | |
56 | #define MT9T031_ROW_ADDRESS_MODE 0x22 | |
57 | #define MT9T031_COLUMN_ADDRESS_MODE 0x23 | |
58 | #define MT9T031_GLOBAL_GAIN 0x35 | |
59 | #define MT9T031_CHIP_ENABLE 0xF8 | |
60 | ||
61 | #define MT9T031_MAX_HEIGHT 1536 | |
62 | #define MT9T031_MAX_WIDTH 2048 | |
63 | #define MT9T031_MIN_HEIGHT 2 | |
6a6c8786 | 64 | #define MT9T031_MIN_WIDTH 18 |
4e96fd08 GL |
65 | #define MT9T031_HORIZONTAL_BLANK 142 |
66 | #define MT9T031_VERTICAL_BLANK 25 | |
67 | #define MT9T031_COLUMN_SKIP 32 | |
68 | #define MT9T031_ROW_SKIP 20 | |
69 | ||
4e96fd08 | 70 | struct mt9t031 { |
979ea1dd | 71 | struct v4l2_subdev subdev; |
41efcd7a HV |
72 | struct v4l2_ctrl_handler hdl; |
73 | struct { | |
74 | /* exposure/auto-exposure cluster */ | |
75 | struct v4l2_ctrl *autoexposure; | |
76 | struct v4l2_ctrl *exposure; | |
77 | }; | |
6a6c8786 | 78 | struct v4l2_rect rect; /* Sensor window */ |
9aea470b | 79 | struct v4l2_clk *clk; |
4e96fd08 GL |
80 | u16 xskip; |
81 | u16 yskip; | |
41efcd7a | 82 | unsigned int total_h; |
32536108 | 83 | unsigned short y_skip_top; /* Lines to skip at the top */ |
4e96fd08 GL |
84 | }; |
85 | ||
979ea1dd GL |
86 | static struct mt9t031 *to_mt9t031(const struct i2c_client *client) |
87 | { | |
88 | return container_of(i2c_get_clientdata(client), struct mt9t031, subdev); | |
89 | } | |
90 | ||
9538e1c2 | 91 | static int reg_read(struct i2c_client *client, const u8 reg) |
4e96fd08 | 92 | { |
3f877045 | 93 | return i2c_smbus_read_word_swapped(client, reg); |
4e96fd08 GL |
94 | } |
95 | ||
9538e1c2 | 96 | static int reg_write(struct i2c_client *client, const u8 reg, |
4e96fd08 GL |
97 | const u16 data) |
98 | { | |
3f877045 | 99 | return i2c_smbus_write_word_swapped(client, reg, data); |
4e96fd08 GL |
100 | } |
101 | ||
9538e1c2 | 102 | static int reg_set(struct i2c_client *client, const u8 reg, |
4e96fd08 GL |
103 | const u16 data) |
104 | { | |
105 | int ret; | |
106 | ||
9538e1c2 | 107 | ret = reg_read(client, reg); |
4e96fd08 GL |
108 | if (ret < 0) |
109 | return ret; | |
9538e1c2 | 110 | return reg_write(client, reg, ret | data); |
4e96fd08 GL |
111 | } |
112 | ||
9538e1c2 | 113 | static int reg_clear(struct i2c_client *client, const u8 reg, |
4e96fd08 GL |
114 | const u16 data) |
115 | { | |
116 | int ret; | |
117 | ||
9538e1c2 | 118 | ret = reg_read(client, reg); |
4e96fd08 GL |
119 | if (ret < 0) |
120 | return ret; | |
9538e1c2 | 121 | return reg_write(client, reg, ret & ~data); |
4e96fd08 GL |
122 | } |
123 | ||
9538e1c2 | 124 | static int set_shutter(struct i2c_client *client, const u32 data) |
4e96fd08 GL |
125 | { |
126 | int ret; | |
127 | ||
9538e1c2 | 128 | ret = reg_write(client, MT9T031_SHUTTER_WIDTH_UPPER, data >> 16); |
4e96fd08 GL |
129 | |
130 | if (ret >= 0) | |
9538e1c2 | 131 | ret = reg_write(client, MT9T031_SHUTTER_WIDTH, data & 0xffff); |
4e96fd08 GL |
132 | |
133 | return ret; | |
134 | } | |
135 | ||
9538e1c2 | 136 | static int get_shutter(struct i2c_client *client, u32 *data) |
4e96fd08 GL |
137 | { |
138 | int ret; | |
139 | ||
9538e1c2 | 140 | ret = reg_read(client, MT9T031_SHUTTER_WIDTH_UPPER); |
4e96fd08 GL |
141 | *data = ret << 16; |
142 | ||
143 | if (ret >= 0) | |
9538e1c2 | 144 | ret = reg_read(client, MT9T031_SHUTTER_WIDTH); |
4e96fd08 GL |
145 | *data |= ret & 0xffff; |
146 | ||
147 | return ret < 0 ? ret : 0; | |
148 | } | |
149 | ||
979ea1dd | 150 | static int mt9t031_idle(struct i2c_client *client) |
4e96fd08 GL |
151 | { |
152 | int ret; | |
153 | ||
154 | /* Disable chip output, synchronous option update */ | |
9538e1c2 | 155 | ret = reg_write(client, MT9T031_RESET, 1); |
4e96fd08 | 156 | if (ret >= 0) |
9538e1c2 | 157 | ret = reg_write(client, MT9T031_RESET, 0); |
4e96fd08 | 158 | if (ret >= 0) |
9538e1c2 | 159 | ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 2); |
4e96fd08 GL |
160 | |
161 | return ret >= 0 ? 0 : -EIO; | |
162 | } | |
163 | ||
979ea1dd GL |
164 | static int mt9t031_s_stream(struct v4l2_subdev *sd, int enable) |
165 | { | |
c4ce6d14 | 166 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
979ea1dd GL |
167 | int ret; |
168 | ||
169 | if (enable) | |
170 | /* Switch to master "normal" mode */ | |
171 | ret = reg_set(client, MT9T031_OUTPUT_CONTROL, 2); | |
172 | else | |
173 | /* Stop sensor readout */ | |
174 | ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 2); | |
175 | ||
176 | if (ret < 0) | |
4e96fd08 | 177 | return -EIO; |
979ea1dd | 178 | |
4e96fd08 GL |
179 | return 0; |
180 | } | |
181 | ||
6a6c8786 GL |
182 | /* target must be _even_ */ |
183 | static u16 mt9t031_skip(s32 *source, s32 target, s32 max) | |
70e1d353 | 184 | { |
6a6c8786 GL |
185 | unsigned int skip; |
186 | ||
187 | if (*source < target + target / 2) { | |
188 | *source = target; | |
189 | return 1; | |
190 | } | |
191 | ||
192 | skip = min(max, *source + target / 2) / target; | |
193 | if (skip > 8) | |
194 | skip = 8; | |
195 | *source = target * skip; | |
196 | ||
197 | return skip; | |
70e1d353 GL |
198 | } |
199 | ||
6a6c8786 | 200 | /* rect is the sensor rectangle, the caller guarantees parameter validity */ |
a3a4ac14 | 201 | static int mt9t031_set_params(struct i2c_client *client, |
09e231b3 | 202 | struct v4l2_rect *rect, u16 xskip, u16 yskip) |
4e96fd08 | 203 | { |
979ea1dd | 204 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
4e96fd08 | 205 | int ret; |
6a6c8786 | 206 | u16 xbin, ybin; |
4e96fd08 GL |
207 | const u16 hblank = MT9T031_HORIZONTAL_BLANK, |
208 | vblank = MT9T031_VERTICAL_BLANK; | |
4e96fd08 GL |
209 | |
210 | xbin = min(xskip, (u16)3); | |
211 | ybin = min(yskip, (u16)3); | |
212 | ||
6a6c8786 GL |
213 | /* |
214 | * Could just do roundup(rect->left, [xy]bin * 2); but this is cheaper. | |
215 | * There is always a valid suitably aligned value. The worst case is | |
216 | * xbin = 3, width = 2048. Then we will start at 36, the last read out | |
217 | * pixel will be 2083, which is < 2085 - first black pixel. | |
218 | * | |
219 | * MT9T031 datasheet imposes window left border alignment, depending on | |
220 | * the selected xskip. Failing to conform to this requirement produces | |
221 | * dark horizontal stripes in the image. However, even obeying to this | |
222 | * requirement doesn't eliminate the stripes in all configurations. They | |
223 | * appear "locally reproducibly," but can differ between tests under | |
224 | * different lighting conditions. | |
225 | */ | |
4e96fd08 | 226 | switch (xbin) { |
6a6c8786 GL |
227 | case 1: |
228 | rect->left &= ~1; | |
4e96fd08 | 229 | break; |
4e96fd08 | 230 | case 2: |
6a6c8786 | 231 | rect->left &= ~3; |
4e96fd08 GL |
232 | break; |
233 | case 3: | |
6a6c8786 GL |
234 | rect->left = rect->left > roundup(MT9T031_COLUMN_SKIP, 6) ? |
235 | (rect->left / 6) * 6 : roundup(MT9T031_COLUMN_SKIP, 6); | |
4e96fd08 GL |
236 | } |
237 | ||
6a6c8786 GL |
238 | rect->top &= ~1; |
239 | ||
240 | dev_dbg(&client->dev, "skip %u:%u, rect %ux%u@%u:%u\n", | |
241 | xskip, yskip, rect->width, rect->height, rect->left, rect->top); | |
242 | ||
70e1d353 | 243 | /* Disable register update, reconfigure atomically */ |
9538e1c2 | 244 | ret = reg_set(client, MT9T031_OUTPUT_CONTROL, 1); |
70e1d353 GL |
245 | if (ret < 0) |
246 | return ret; | |
247 | ||
4e96fd08 | 248 | /* Blanking and start values - default... */ |
9538e1c2 | 249 | ret = reg_write(client, MT9T031_HORIZONTAL_BLANKING, hblank); |
4e96fd08 | 250 | if (ret >= 0) |
9538e1c2 | 251 | ret = reg_write(client, MT9T031_VERTICAL_BLANKING, vblank); |
4e96fd08 | 252 | |
09e231b3 | 253 | if (yskip != mt9t031->yskip || xskip != mt9t031->xskip) { |
4e96fd08 GL |
254 | /* Binning, skipping */ |
255 | if (ret >= 0) | |
9538e1c2 | 256 | ret = reg_write(client, MT9T031_COLUMN_ADDRESS_MODE, |
4e96fd08 GL |
257 | ((xbin - 1) << 4) | (xskip - 1)); |
258 | if (ret >= 0) | |
9538e1c2 | 259 | ret = reg_write(client, MT9T031_ROW_ADDRESS_MODE, |
4e96fd08 GL |
260 | ((ybin - 1) << 4) | (yskip - 1)); |
261 | } | |
6a6c8786 GL |
262 | dev_dbg(&client->dev, "new physical left %u, top %u\n", |
263 | rect->left, rect->top); | |
4e96fd08 | 264 | |
5d28d525 GL |
265 | /* |
266 | * The caller provides a supported format, as guaranteed by | |
14178aa5 | 267 | * .try_mbus_fmt(), soc_camera_s_crop() and soc_camera_cropcap() |
5d28d525 | 268 | */ |
4e96fd08 | 269 | if (ret >= 0) |
6a6c8786 | 270 | ret = reg_write(client, MT9T031_COLUMN_START, rect->left); |
4e96fd08 | 271 | if (ret >= 0) |
6a6c8786 | 272 | ret = reg_write(client, MT9T031_ROW_START, rect->top); |
4e96fd08 | 273 | if (ret >= 0) |
6a6c8786 | 274 | ret = reg_write(client, MT9T031_WINDOW_WIDTH, rect->width - 1); |
4e96fd08 | 275 | if (ret >= 0) |
9538e1c2 | 276 | ret = reg_write(client, MT9T031_WINDOW_HEIGHT, |
32536108 | 277 | rect->height + mt9t031->y_skip_top - 1); |
41efcd7a HV |
278 | if (ret >= 0 && v4l2_ctrl_g_ctrl(mt9t031->autoexposure) == V4L2_EXPOSURE_AUTO) { |
279 | mt9t031->total_h = rect->height + mt9t031->y_skip_top + vblank; | |
280 | ||
281 | ret = set_shutter(client, mt9t031->total_h); | |
4e96fd08 GL |
282 | } |
283 | ||
09e231b3 GL |
284 | /* Re-enable register update, commit all changes */ |
285 | if (ret >= 0) | |
9538e1c2 | 286 | ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 1); |
09e231b3 | 287 | |
6a6c8786 GL |
288 | if (ret >= 0) { |
289 | mt9t031->rect = *rect; | |
290 | mt9t031->xskip = xskip; | |
291 | mt9t031->yskip = yskip; | |
292 | } | |
293 | ||
09e231b3 GL |
294 | return ret < 0 ? ret : 0; |
295 | } | |
296 | ||
4f996594 | 297 | static int mt9t031_s_crop(struct v4l2_subdev *sd, const struct v4l2_crop *a) |
09e231b3 | 298 | { |
6a6c8786 | 299 | struct v4l2_rect rect = a->c; |
c4ce6d14 | 300 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
979ea1dd | 301 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
09e231b3 | 302 | |
6a6c8786 GL |
303 | rect.width = ALIGN(rect.width, 2); |
304 | rect.height = ALIGN(rect.height, 2); | |
305 | ||
306 | soc_camera_limit_side(&rect.left, &rect.width, | |
307 | MT9T031_COLUMN_SKIP, MT9T031_MIN_WIDTH, MT9T031_MAX_WIDTH); | |
308 | ||
309 | soc_camera_limit_side(&rect.top, &rect.height, | |
310 | MT9T031_ROW_SKIP, MT9T031_MIN_HEIGHT, MT9T031_MAX_HEIGHT); | |
311 | ||
a3a4ac14 | 312 | return mt9t031_set_params(client, &rect, mt9t031->xskip, mt9t031->yskip); |
6a6c8786 GL |
313 | } |
314 | ||
315 | static int mt9t031_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) | |
316 | { | |
c4ce6d14 | 317 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
6a6c8786 GL |
318 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
319 | ||
320 | a->c = mt9t031->rect; | |
321 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
e330919a | 322 | |
6a6c8786 GL |
323 | return 0; |
324 | } | |
325 | ||
326 | static int mt9t031_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a) | |
327 | { | |
328 | a->bounds.left = MT9T031_COLUMN_SKIP; | |
329 | a->bounds.top = MT9T031_ROW_SKIP; | |
330 | a->bounds.width = MT9T031_MAX_WIDTH; | |
331 | a->bounds.height = MT9T031_MAX_HEIGHT; | |
332 | a->defrect = a->bounds; | |
333 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
334 | a->pixelaspect.numerator = 1; | |
335 | a->pixelaspect.denominator = 1; | |
e330919a | 336 | |
6a6c8786 GL |
337 | return 0; |
338 | } | |
339 | ||
760697be GL |
340 | static int mt9t031_g_fmt(struct v4l2_subdev *sd, |
341 | struct v4l2_mbus_framefmt *mf) | |
6a6c8786 | 342 | { |
c4ce6d14 | 343 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
6a6c8786 | 344 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
6a6c8786 | 345 | |
760697be GL |
346 | mf->width = mt9t031->rect.width / mt9t031->xskip; |
347 | mf->height = mt9t031->rect.height / mt9t031->yskip; | |
f5fe58fd | 348 | mf->code = MEDIA_BUS_FMT_SBGGR10_1X10; |
760697be GL |
349 | mf->colorspace = V4L2_COLORSPACE_SRGB; |
350 | mf->field = V4L2_FIELD_NONE; | |
6a6c8786 GL |
351 | |
352 | return 0; | |
09e231b3 GL |
353 | } |
354 | ||
760697be GL |
355 | static int mt9t031_s_fmt(struct v4l2_subdev *sd, |
356 | struct v4l2_mbus_framefmt *mf) | |
09e231b3 | 357 | { |
c4ce6d14 | 358 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
979ea1dd | 359 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
09e231b3 | 360 | u16 xskip, yskip; |
6a6c8786 | 361 | struct v4l2_rect rect = mt9t031->rect; |
09e231b3 GL |
362 | |
363 | /* | |
6a6c8786 GL |
364 | * try_fmt has put width and height within limits. |
365 | * S_FMT: use binning and skipping for scaling | |
09e231b3 | 366 | */ |
760697be GL |
367 | xskip = mt9t031_skip(&rect.width, mf->width, MT9T031_MAX_WIDTH); |
368 | yskip = mt9t031_skip(&rect.height, mf->height, MT9T031_MAX_HEIGHT); | |
369 | ||
f5fe58fd | 370 | mf->code = MEDIA_BUS_FMT_SBGGR10_1X10; |
760697be | 371 | mf->colorspace = V4L2_COLORSPACE_SRGB; |
4e96fd08 | 372 | |
6a6c8786 | 373 | /* mt9t031_set_params() doesn't change width and height */ |
a3a4ac14 | 374 | return mt9t031_set_params(client, &rect, xskip, yskip); |
4e96fd08 GL |
375 | } |
376 | ||
6a6c8786 GL |
377 | /* |
378 | * If a user window larger than sensor window is requested, we'll increase the | |
379 | * sensor window. | |
380 | */ | |
760697be GL |
381 | static int mt9t031_try_fmt(struct v4l2_subdev *sd, |
382 | struct v4l2_mbus_framefmt *mf) | |
4e96fd08 | 383 | { |
653dc59b | 384 | v4l_bound_align_image( |
760697be GL |
385 | &mf->width, MT9T031_MIN_WIDTH, MT9T031_MAX_WIDTH, 1, |
386 | &mf->height, MT9T031_MIN_HEIGHT, MT9T031_MAX_HEIGHT, 1, 0); | |
387 | ||
f5fe58fd | 388 | mf->code = MEDIA_BUS_FMT_SBGGR10_1X10; |
760697be | 389 | mf->colorspace = V4L2_COLORSPACE_SRGB; |
4e96fd08 GL |
390 | |
391 | return 0; | |
392 | } | |
393 | ||
4e96fd08 | 394 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
979ea1dd GL |
395 | static int mt9t031_g_register(struct v4l2_subdev *sd, |
396 | struct v4l2_dbg_register *reg) | |
4e96fd08 | 397 | { |
c4ce6d14 | 398 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
4e96fd08 | 399 | |
6be89daa | 400 | if (reg->reg > 0xff) |
4e96fd08 GL |
401 | return -EINVAL; |
402 | ||
15c4fee3 | 403 | reg->size = 1; |
9538e1c2 | 404 | reg->val = reg_read(client, reg->reg); |
4e96fd08 GL |
405 | |
406 | if (reg->val > 0xffff) | |
407 | return -EIO; | |
408 | ||
409 | return 0; | |
410 | } | |
411 | ||
979ea1dd | 412 | static int mt9t031_s_register(struct v4l2_subdev *sd, |
977ba3b1 | 413 | const struct v4l2_dbg_register *reg) |
4e96fd08 | 414 | { |
c4ce6d14 | 415 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
4e96fd08 | 416 | |
6be89daa | 417 | if (reg->reg > 0xff) |
4e96fd08 GL |
418 | return -EINVAL; |
419 | ||
9538e1c2 | 420 | if (reg_write(client, reg->reg, reg->val) < 0) |
4e96fd08 GL |
421 | return -EIO; |
422 | ||
423 | return 0; | |
424 | } | |
425 | #endif | |
426 | ||
41efcd7a | 427 | static int mt9t031_g_volatile_ctrl(struct v4l2_ctrl *ctrl) |
4e96fd08 | 428 | { |
41efcd7a HV |
429 | struct mt9t031 *mt9t031 = container_of(ctrl->handler, |
430 | struct mt9t031, hdl); | |
431 | const u32 shutter_max = MT9T031_MAX_HEIGHT + MT9T031_VERTICAL_BLANK; | |
432 | s32 min, max; | |
4e96fd08 GL |
433 | |
434 | switch (ctrl->id) { | |
4e96fd08 | 435 | case V4L2_CID_EXPOSURE_AUTO: |
41efcd7a HV |
436 | min = mt9t031->exposure->minimum; |
437 | max = mt9t031->exposure->maximum; | |
438 | mt9t031->exposure->val = | |
439 | (shutter_max / 2 + (mt9t031->total_h - 1) * (max - min)) | |
440 | / shutter_max + min; | |
96c75399 | 441 | break; |
4e96fd08 GL |
442 | } |
443 | return 0; | |
444 | } | |
445 | ||
41efcd7a | 446 | static int mt9t031_s_ctrl(struct v4l2_ctrl *ctrl) |
4e96fd08 | 447 | { |
41efcd7a HV |
448 | struct mt9t031 *mt9t031 = container_of(ctrl->handler, |
449 | struct mt9t031, hdl); | |
450 | struct v4l2_subdev *sd = &mt9t031->subdev; | |
c4ce6d14 | 451 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
41efcd7a | 452 | struct v4l2_ctrl *exp = mt9t031->exposure; |
4e96fd08 GL |
453 | int data; |
454 | ||
4e96fd08 GL |
455 | switch (ctrl->id) { |
456 | case V4L2_CID_VFLIP: | |
41efcd7a | 457 | if (ctrl->val) |
9538e1c2 | 458 | data = reg_set(client, MT9T031_READ_MODE_2, 0x8000); |
4e96fd08 | 459 | else |
9538e1c2 | 460 | data = reg_clear(client, MT9T031_READ_MODE_2, 0x8000); |
4e96fd08 GL |
461 | if (data < 0) |
462 | return -EIO; | |
41efcd7a | 463 | return 0; |
4e96fd08 | 464 | case V4L2_CID_HFLIP: |
41efcd7a | 465 | if (ctrl->val) |
9538e1c2 | 466 | data = reg_set(client, MT9T031_READ_MODE_2, 0x4000); |
4e96fd08 | 467 | else |
9538e1c2 | 468 | data = reg_clear(client, MT9T031_READ_MODE_2, 0x4000); |
4e96fd08 GL |
469 | if (data < 0) |
470 | return -EIO; | |
41efcd7a | 471 | return 0; |
4e96fd08 | 472 | case V4L2_CID_GAIN: |
4e96fd08 | 473 | /* See Datasheet Table 7, Gain settings. */ |
41efcd7a | 474 | if (ctrl->val <= ctrl->default_value) { |
4e96fd08 | 475 | /* Pack it into 0..1 step 0.125, register values 0..8 */ |
41efcd7a | 476 | unsigned long range = ctrl->default_value - ctrl->minimum; |
0d5e8c43 | 477 | data = ((ctrl->val - (s32)ctrl->minimum) * 8 + range / 2) / range; |
4e96fd08 | 478 | |
85f8be68 | 479 | dev_dbg(&client->dev, "Setting gain %d\n", data); |
9538e1c2 | 480 | data = reg_write(client, MT9T031_GLOBAL_GAIN, data); |
4e96fd08 GL |
481 | if (data < 0) |
482 | return -EIO; | |
483 | } else { | |
70e1d353 | 484 | /* Pack it into 1.125..128 variable step, register values 9..0x7860 */ |
4e96fd08 | 485 | /* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */ |
41efcd7a | 486 | unsigned long range = ctrl->maximum - ctrl->default_value - 1; |
70e1d353 | 487 | /* calculated gain: map 65..127 to 9..1024 step 0.125 */ |
0d5e8c43 | 488 | unsigned long gain = ((ctrl->val - (s32)ctrl->default_value - 1) * |
70e1d353 | 489 | 1015 + range / 2) / range + 9; |
4e96fd08 | 490 | |
70e1d353 | 491 | if (gain <= 32) /* calculated gain 9..32 -> 9..32 */ |
4e96fd08 | 492 | data = gain; |
70e1d353 | 493 | else if (gain <= 64) /* calculated gain 33..64 -> 0x51..0x60 */ |
4e96fd08 GL |
494 | data = ((gain - 32) * 16 + 16) / 32 + 80; |
495 | else | |
70e1d353 GL |
496 | /* calculated gain 65..1024 -> (1..120) << 8 + 0x60 */ |
497 | data = (((gain - 64 + 7) * 32) & 0xff00) | 0x60; | |
4e96fd08 | 498 | |
85f8be68 | 499 | dev_dbg(&client->dev, "Set gain from 0x%x to 0x%x\n", |
9538e1c2 GL |
500 | reg_read(client, MT9T031_GLOBAL_GAIN), data); |
501 | data = reg_write(client, MT9T031_GLOBAL_GAIN, data); | |
4e96fd08 GL |
502 | if (data < 0) |
503 | return -EIO; | |
504 | } | |
41efcd7a | 505 | return 0; |
4e96fd08 | 506 | |
41efcd7a HV |
507 | case V4L2_CID_EXPOSURE_AUTO: |
508 | if (ctrl->val == V4L2_EXPOSURE_MANUAL) { | |
509 | unsigned int range = exp->maximum - exp->minimum; | |
0d5e8c43 | 510 | unsigned int shutter = ((exp->val - (s32)exp->minimum) * 1048 + |
41efcd7a | 511 | range / 2) / range + 1; |
4e96fd08 GL |
512 | u32 old; |
513 | ||
9538e1c2 | 514 | get_shutter(client, &old); |
85f8be68 | 515 | dev_dbg(&client->dev, "Set shutter from %u to %u\n", |
4e96fd08 | 516 | old, shutter); |
9538e1c2 | 517 | if (set_shutter(client, shutter) < 0) |
4e96fd08 | 518 | return -EIO; |
41efcd7a | 519 | } else { |
4e96fd08 | 520 | const u16 vblank = MT9T031_VERTICAL_BLANK; |
41efcd7a | 521 | mt9t031->total_h = mt9t031->rect.height + |
32536108 | 522 | mt9t031->y_skip_top + vblank; |
96c75399 | 523 | |
41efcd7a | 524 | if (set_shutter(client, mt9t031->total_h) < 0) |
4e96fd08 | 525 | return -EIO; |
41efcd7a HV |
526 | } |
527 | return 0; | |
a3a4ac14 GL |
528 | default: |
529 | return -EINVAL; | |
4e96fd08 GL |
530 | } |
531 | return 0; | |
532 | } | |
533 | ||
535653b1 VL |
534 | /* |
535 | * Power Management: | |
536 | * This function does nothing for now but must be present for pm to work | |
537 | */ | |
538 | static int mt9t031_runtime_suspend(struct device *dev) | |
539 | { | |
540 | return 0; | |
541 | } | |
542 | ||
543 | /* | |
544 | * Power Management: | |
545 | * COLUMN_ADDRESS_MODE and ROW_ADDRESS_MODE are not rewritten if unchanged | |
546 | * they are however changed at reset if the platform hook is present | |
547 | * thus we rewrite them with the values stored by the driver | |
548 | */ | |
549 | static int mt9t031_runtime_resume(struct device *dev) | |
550 | { | |
551 | struct video_device *vdev = to_video_device(dev); | |
14178aa5 | 552 | struct v4l2_subdev *sd = soc_camera_vdev_to_subdev(vdev); |
c4ce6d14 | 553 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
535653b1 VL |
554 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
555 | ||
556 | int ret; | |
557 | u16 xbin, ybin; | |
558 | ||
559 | xbin = min(mt9t031->xskip, (u16)3); | |
560 | ybin = min(mt9t031->yskip, (u16)3); | |
561 | ||
562 | ret = reg_write(client, MT9T031_COLUMN_ADDRESS_MODE, | |
563 | ((xbin - 1) << 4) | (mt9t031->xskip - 1)); | |
564 | if (ret < 0) | |
565 | return ret; | |
566 | ||
567 | ret = reg_write(client, MT9T031_ROW_ADDRESS_MODE, | |
568 | ((ybin - 1) << 4) | (mt9t031->yskip - 1)); | |
569 | if (ret < 0) | |
570 | return ret; | |
571 | ||
572 | return 0; | |
573 | } | |
574 | ||
cbdb1f9d | 575 | static const struct dev_pm_ops mt9t031_dev_pm_ops = { |
535653b1 VL |
576 | .runtime_suspend = mt9t031_runtime_suspend, |
577 | .runtime_resume = mt9t031_runtime_resume, | |
578 | }; | |
579 | ||
580 | static struct device_type mt9t031_dev_type = { | |
581 | .name = "MT9T031", | |
582 | .pm = &mt9t031_dev_pm_ops, | |
583 | }; | |
584 | ||
2f0babb7 GL |
585 | static int mt9t031_s_power(struct v4l2_subdev *sd, int on) |
586 | { | |
587 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
25a34811 | 588 | struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client); |
2f0babb7 | 589 | struct video_device *vdev = soc_camera_i2c_to_vdev(client); |
9aea470b | 590 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
4ec10bac | 591 | int ret; |
2f0babb7 | 592 | |
4ec10bac | 593 | if (on) { |
9aea470b | 594 | ret = soc_camera_power_on(&client->dev, ssdd, mt9t031->clk); |
4ec10bac LP |
595 | if (ret < 0) |
596 | return ret; | |
3d238885 GL |
597 | if (vdev) |
598 | /* Not needed during probing, when vdev isn't available yet */ | |
599 | vdev->dev.type = &mt9t031_dev_type; | |
4ec10bac | 600 | } else { |
3d238885 GL |
601 | if (vdev) |
602 | vdev->dev.type = NULL; | |
9aea470b | 603 | soc_camera_power_off(&client->dev, ssdd, mt9t031->clk); |
4ec10bac | 604 | } |
2f0babb7 GL |
605 | |
606 | return 0; | |
607 | } | |
608 | ||
5d28d525 GL |
609 | /* |
610 | * Interface active, can use i2c. If it fails, it can indeed mean, that | |
611 | * this wasn't our capture interface, so, we wait for the right one | |
612 | */ | |
979ea1dd | 613 | static int mt9t031_video_probe(struct i2c_client *client) |
4e96fd08 | 614 | { |
979ea1dd | 615 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
4e96fd08 | 616 | s32 data; |
a4c56fd8 | 617 | int ret; |
4e96fd08 | 618 | |
4bbc6d52 LP |
619 | ret = mt9t031_s_power(&mt9t031->subdev, 1); |
620 | if (ret < 0) | |
621 | return ret; | |
622 | ||
623 | ret = mt9t031_idle(client); | |
624 | if (ret < 0) { | |
625 | dev_err(&client->dev, "Failed to initialise the camera\n"); | |
626 | goto done; | |
627 | } | |
4e96fd08 GL |
628 | |
629 | /* Read out the chip version register */ | |
9538e1c2 | 630 | data = reg_read(client, MT9T031_CHIP_VERSION); |
4e96fd08 GL |
631 | |
632 | switch (data) { | |
633 | case 0x1621: | |
4e96fd08 GL |
634 | break; |
635 | default: | |
85f8be68 | 636 | dev_err(&client->dev, |
4e96fd08 | 637 | "No MT9T031 chip detected, register read %x\n", data); |
4bbc6d52 LP |
638 | ret = -ENODEV; |
639 | goto done; | |
4e96fd08 GL |
640 | } |
641 | ||
85f8be68 | 642 | dev_info(&client->dev, "Detected a MT9T031 chip ID %x\n", data); |
4e96fd08 | 643 | |
4bbc6d52 LP |
644 | ret = v4l2_ctrl_handler_setup(&mt9t031->hdl); |
645 | ||
646 | done: | |
647 | mt9t031_s_power(&mt9t031->subdev, 0); | |
2f0babb7 | 648 | |
a4c56fd8 | 649 | return ret; |
4e96fd08 GL |
650 | } |
651 | ||
32536108 GL |
652 | static int mt9t031_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines) |
653 | { | |
c4ce6d14 | 654 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
32536108 GL |
655 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
656 | ||
657 | *lines = mt9t031->y_skip_top; | |
658 | ||
659 | return 0; | |
660 | } | |
661 | ||
41efcd7a HV |
662 | static const struct v4l2_ctrl_ops mt9t031_ctrl_ops = { |
663 | .g_volatile_ctrl = mt9t031_g_volatile_ctrl, | |
664 | .s_ctrl = mt9t031_s_ctrl, | |
665 | }; | |
666 | ||
979ea1dd | 667 | static struct v4l2_subdev_core_ops mt9t031_subdev_core_ops = { |
2f0babb7 | 668 | .s_power = mt9t031_s_power, |
979ea1dd GL |
669 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
670 | .g_register = mt9t031_g_register, | |
671 | .s_register = mt9t031_s_register, | |
672 | #endif | |
673 | }; | |
674 | ||
3805f201 | 675 | static int mt9t031_enum_fmt(struct v4l2_subdev *sd, unsigned int index, |
f5fe58fd | 676 | u32 *code) |
760697be GL |
677 | { |
678 | if (index) | |
679 | return -EINVAL; | |
680 | ||
f5fe58fd | 681 | *code = MEDIA_BUS_FMT_SBGGR10_1X10; |
760697be GL |
682 | return 0; |
683 | } | |
684 | ||
a3505755 GL |
685 | static int mt9t031_g_mbus_config(struct v4l2_subdev *sd, |
686 | struct v4l2_mbus_config *cfg) | |
687 | { | |
688 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
25a34811 | 689 | struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client); |
a3505755 GL |
690 | |
691 | cfg->flags = V4L2_MBUS_MASTER | V4L2_MBUS_PCLK_SAMPLE_RISING | | |
692 | V4L2_MBUS_PCLK_SAMPLE_FALLING | V4L2_MBUS_HSYNC_ACTIVE_HIGH | | |
693 | V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_DATA_ACTIVE_HIGH; | |
694 | cfg->type = V4L2_MBUS_PARALLEL; | |
25a34811 | 695 | cfg->flags = soc_camera_apply_board_flags(ssdd, cfg); |
a3505755 GL |
696 | |
697 | return 0; | |
698 | } | |
699 | ||
700 | static int mt9t031_s_mbus_config(struct v4l2_subdev *sd, | |
701 | const struct v4l2_mbus_config *cfg) | |
702 | { | |
703 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
25a34811 | 704 | struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client); |
a3505755 | 705 | |
25a34811 | 706 | if (soc_camera_apply_board_flags(ssdd, cfg) & |
a3505755 GL |
707 | V4L2_MBUS_PCLK_SAMPLE_FALLING) |
708 | return reg_clear(client, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000); | |
709 | else | |
710 | return reg_set(client, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000); | |
711 | } | |
712 | ||
979ea1dd GL |
713 | static struct v4l2_subdev_video_ops mt9t031_subdev_video_ops = { |
714 | .s_stream = mt9t031_s_stream, | |
760697be GL |
715 | .s_mbus_fmt = mt9t031_s_fmt, |
716 | .g_mbus_fmt = mt9t031_g_fmt, | |
717 | .try_mbus_fmt = mt9t031_try_fmt, | |
08590b96 | 718 | .s_crop = mt9t031_s_crop, |
6a6c8786 GL |
719 | .g_crop = mt9t031_g_crop, |
720 | .cropcap = mt9t031_cropcap, | |
760697be | 721 | .enum_mbus_fmt = mt9t031_enum_fmt, |
a3505755 GL |
722 | .g_mbus_config = mt9t031_g_mbus_config, |
723 | .s_mbus_config = mt9t031_s_mbus_config, | |
979ea1dd GL |
724 | }; |
725 | ||
32536108 GL |
726 | static struct v4l2_subdev_sensor_ops mt9t031_subdev_sensor_ops = { |
727 | .g_skip_top_lines = mt9t031_g_skip_top_lines, | |
728 | }; | |
729 | ||
979ea1dd GL |
730 | static struct v4l2_subdev_ops mt9t031_subdev_ops = { |
731 | .core = &mt9t031_subdev_core_ops, | |
732 | .video = &mt9t031_subdev_video_ops, | |
32536108 | 733 | .sensor = &mt9t031_subdev_sensor_ops, |
979ea1dd GL |
734 | }; |
735 | ||
4e96fd08 GL |
736 | static int mt9t031_probe(struct i2c_client *client, |
737 | const struct i2c_device_id *did) | |
738 | { | |
739 | struct mt9t031 *mt9t031; | |
25a34811 | 740 | struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client); |
4e96fd08 | 741 | struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); |
4e96fd08 GL |
742 | int ret; |
743 | ||
25a34811 | 744 | if (!ssdd) { |
14178aa5 GL |
745 | dev_err(&client->dev, "MT9T031 driver needs platform data\n"); |
746 | return -EINVAL; | |
4e96fd08 GL |
747 | } |
748 | ||
749 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) { | |
750 | dev_warn(&adapter->dev, | |
751 | "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n"); | |
752 | return -EIO; | |
753 | } | |
754 | ||
70e176a5 | 755 | mt9t031 = devm_kzalloc(&client->dev, sizeof(struct mt9t031), GFP_KERNEL); |
4e96fd08 GL |
756 | if (!mt9t031) |
757 | return -ENOMEM; | |
758 | ||
979ea1dd | 759 | v4l2_i2c_subdev_init(&mt9t031->subdev, client, &mt9t031_subdev_ops); |
41efcd7a HV |
760 | v4l2_ctrl_handler_init(&mt9t031->hdl, 5); |
761 | v4l2_ctrl_new_std(&mt9t031->hdl, &mt9t031_ctrl_ops, | |
762 | V4L2_CID_VFLIP, 0, 1, 1, 0); | |
763 | v4l2_ctrl_new_std(&mt9t031->hdl, &mt9t031_ctrl_ops, | |
764 | V4L2_CID_HFLIP, 0, 1, 1, 0); | |
765 | v4l2_ctrl_new_std(&mt9t031->hdl, &mt9t031_ctrl_ops, | |
766 | V4L2_CID_GAIN, 0, 127, 1, 64); | |
767 | ||
768 | /* | |
769 | * Simulated autoexposure. If enabled, we calculate shutter width | |
770 | * ourselves in the driver based on vertical blanking and frame width | |
771 | */ | |
772 | mt9t031->autoexposure = v4l2_ctrl_new_std_menu(&mt9t031->hdl, | |
773 | &mt9t031_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1, 0, | |
774 | V4L2_EXPOSURE_AUTO); | |
775 | mt9t031->exposure = v4l2_ctrl_new_std(&mt9t031->hdl, &mt9t031_ctrl_ops, | |
776 | V4L2_CID_EXPOSURE, 1, 255, 1, 255); | |
777 | ||
778 | mt9t031->subdev.ctrl_handler = &mt9t031->hdl; | |
70e176a5 GL |
779 | if (mt9t031->hdl.error) |
780 | return mt9t031->hdl.error; | |
41efcd7a | 781 | |
41efcd7a HV |
782 | v4l2_ctrl_auto_cluster(2, &mt9t031->autoexposure, |
783 | V4L2_EXPOSURE_MANUAL, true); | |
4e96fd08 | 784 | |
32536108 | 785 | mt9t031->y_skip_top = 0; |
6a6c8786 GL |
786 | mt9t031->rect.left = MT9T031_COLUMN_SKIP; |
787 | mt9t031->rect.top = MT9T031_ROW_SKIP; | |
788 | mt9t031->rect.width = MT9T031_MAX_WIDTH; | |
789 | mt9t031->rect.height = MT9T031_MAX_HEIGHT; | |
790 | ||
4e96fd08 GL |
791 | mt9t031->xskip = 1; |
792 | mt9t031->yskip = 1; | |
793 | ||
9aea470b GL |
794 | mt9t031->clk = v4l2_clk_get(&client->dev, "mclk"); |
795 | if (IS_ERR(mt9t031->clk)) { | |
796 | ret = PTR_ERR(mt9t031->clk); | |
797 | goto eclkget; | |
798 | } | |
799 | ||
979ea1dd | 800 | ret = mt9t031_video_probe(client); |
9aea470b GL |
801 | if (ret) { |
802 | v4l2_clk_put(mt9t031->clk); | |
803 | eclkget: | |
41efcd7a | 804 | v4l2_ctrl_handler_free(&mt9t031->hdl); |
9aea470b | 805 | } |
4e96fd08 | 806 | |
4e96fd08 GL |
807 | return ret; |
808 | } | |
809 | ||
810 | static int mt9t031_remove(struct i2c_client *client) | |
811 | { | |
979ea1dd | 812 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
4e96fd08 | 813 | |
9aea470b | 814 | v4l2_clk_put(mt9t031->clk); |
41efcd7a HV |
815 | v4l2_device_unregister_subdev(&mt9t031->subdev); |
816 | v4l2_ctrl_handler_free(&mt9t031->hdl); | |
4e96fd08 GL |
817 | |
818 | return 0; | |
819 | } | |
820 | ||
821 | static const struct i2c_device_id mt9t031_id[] = { | |
822 | { "mt9t031", 0 }, | |
823 | { } | |
824 | }; | |
825 | MODULE_DEVICE_TABLE(i2c, mt9t031_id); | |
826 | ||
827 | static struct i2c_driver mt9t031_i2c_driver = { | |
828 | .driver = { | |
829 | .name = "mt9t031", | |
830 | }, | |
831 | .probe = mt9t031_probe, | |
832 | .remove = mt9t031_remove, | |
833 | .id_table = mt9t031_id, | |
834 | }; | |
835 | ||
c6e8d86f | 836 | module_i2c_driver(mt9t031_i2c_driver); |
4e96fd08 GL |
837 | |
838 | MODULE_DESCRIPTION("Micron MT9T031 Camera driver"); | |
839 | MODULE_AUTHOR("Guennadi Liakhovetski <lg@denx.de>"); | |
840 | MODULE_LICENSE("GPL v2"); |