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 | |
50 | #define MT9T031_MIN_WIDTH 2 | |
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; |
4e96fd08 GL |
72 | int model; /* V4L2_IDENT_MT9T031* codes from v4l2-chip-ident.h */ |
73 | unsigned char autoexposure; | |
74 | u16 xskip; | |
75 | u16 yskip; | |
76 | }; | |
77 | ||
979ea1dd GL |
78 | static struct mt9t031 *to_mt9t031(const struct i2c_client *client) |
79 | { | |
80 | return container_of(i2c_get_clientdata(client), struct mt9t031, subdev); | |
81 | } | |
82 | ||
9538e1c2 | 83 | static int reg_read(struct i2c_client *client, const u8 reg) |
4e96fd08 | 84 | { |
4e96fd08 GL |
85 | s32 data = i2c_smbus_read_word_data(client, reg); |
86 | return data < 0 ? data : swab16(data); | |
87 | } | |
88 | ||
9538e1c2 | 89 | static int reg_write(struct i2c_client *client, const u8 reg, |
4e96fd08 GL |
90 | const u16 data) |
91 | { | |
9538e1c2 | 92 | return i2c_smbus_write_word_data(client, reg, swab16(data)); |
4e96fd08 GL |
93 | } |
94 | ||
9538e1c2 | 95 | static int reg_set(struct i2c_client *client, const u8 reg, |
4e96fd08 GL |
96 | const u16 data) |
97 | { | |
98 | int ret; | |
99 | ||
9538e1c2 | 100 | ret = reg_read(client, reg); |
4e96fd08 GL |
101 | if (ret < 0) |
102 | return ret; | |
9538e1c2 | 103 | return reg_write(client, reg, ret | data); |
4e96fd08 GL |
104 | } |
105 | ||
9538e1c2 | 106 | static int reg_clear(struct i2c_client *client, const u8 reg, |
4e96fd08 GL |
107 | const u16 data) |
108 | { | |
109 | int ret; | |
110 | ||
9538e1c2 | 111 | ret = reg_read(client, reg); |
4e96fd08 GL |
112 | if (ret < 0) |
113 | return ret; | |
9538e1c2 | 114 | return reg_write(client, reg, ret & ~data); |
4e96fd08 GL |
115 | } |
116 | ||
9538e1c2 | 117 | static int set_shutter(struct i2c_client *client, const u32 data) |
4e96fd08 GL |
118 | { |
119 | int ret; | |
120 | ||
9538e1c2 | 121 | ret = reg_write(client, MT9T031_SHUTTER_WIDTH_UPPER, data >> 16); |
4e96fd08 GL |
122 | |
123 | if (ret >= 0) | |
9538e1c2 | 124 | ret = reg_write(client, MT9T031_SHUTTER_WIDTH, data & 0xffff); |
4e96fd08 GL |
125 | |
126 | return ret; | |
127 | } | |
128 | ||
9538e1c2 | 129 | static int get_shutter(struct i2c_client *client, u32 *data) |
4e96fd08 GL |
130 | { |
131 | int ret; | |
132 | ||
9538e1c2 | 133 | ret = reg_read(client, MT9T031_SHUTTER_WIDTH_UPPER); |
4e96fd08 GL |
134 | *data = ret << 16; |
135 | ||
136 | if (ret >= 0) | |
9538e1c2 | 137 | ret = reg_read(client, MT9T031_SHUTTER_WIDTH); |
4e96fd08 GL |
138 | *data |= ret & 0xffff; |
139 | ||
140 | return ret < 0 ? ret : 0; | |
141 | } | |
142 | ||
979ea1dd | 143 | static int mt9t031_idle(struct i2c_client *client) |
4e96fd08 GL |
144 | { |
145 | int ret; | |
146 | ||
147 | /* Disable chip output, synchronous option update */ | |
9538e1c2 | 148 | ret = reg_write(client, MT9T031_RESET, 1); |
4e96fd08 | 149 | if (ret >= 0) |
9538e1c2 | 150 | ret = reg_write(client, MT9T031_RESET, 0); |
4e96fd08 | 151 | if (ret >= 0) |
9538e1c2 | 152 | ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 2); |
4e96fd08 GL |
153 | |
154 | return ret >= 0 ? 0 : -EIO; | |
155 | } | |
156 | ||
979ea1dd | 157 | static int mt9t031_disable(struct i2c_client *client) |
4e96fd08 GL |
158 | { |
159 | /* Disable the chip */ | |
9538e1c2 | 160 | reg_clear(client, MT9T031_OUTPUT_CONTROL, 2); |
f9826514 | 161 | |
4e96fd08 GL |
162 | return 0; |
163 | } | |
164 | ||
979ea1dd | 165 | static int mt9t031_init(struct soc_camera_device *icd) |
4e96fd08 | 166 | { |
40e2e092 | 167 | struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd)); |
9538e1c2 | 168 | |
979ea1dd | 169 | return mt9t031_idle(client); |
4e96fd08 GL |
170 | } |
171 | ||
979ea1dd | 172 | static int mt9t031_release(struct soc_camera_device *icd) |
4e96fd08 | 173 | { |
40e2e092 | 174 | struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd)); |
9538e1c2 | 175 | |
979ea1dd GL |
176 | return mt9t031_disable(client); |
177 | } | |
178 | ||
179 | static int mt9t031_s_stream(struct v4l2_subdev *sd, int enable) | |
180 | { | |
181 | struct i2c_client *client = sd->priv; | |
182 | int ret; | |
183 | ||
184 | if (enable) | |
185 | /* Switch to master "normal" mode */ | |
186 | ret = reg_set(client, MT9T031_OUTPUT_CONTROL, 2); | |
187 | else | |
188 | /* Stop sensor readout */ | |
189 | ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 2); | |
190 | ||
191 | if (ret < 0) | |
4e96fd08 | 192 | return -EIO; |
979ea1dd | 193 | |
4e96fd08 GL |
194 | return 0; |
195 | } | |
196 | ||
197 | static int mt9t031_set_bus_param(struct soc_camera_device *icd, | |
198 | unsigned long flags) | |
199 | { | |
40e2e092 | 200 | struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd)); |
9538e1c2 | 201 | |
4e96fd08 GL |
202 | /* The caller should have queried our parameters, check anyway */ |
203 | if (flags & ~MT9T031_BUS_PARAM) | |
204 | return -EINVAL; | |
205 | ||
206 | if (flags & SOCAM_PCLK_SAMPLE_FALLING) | |
9538e1c2 | 207 | reg_clear(client, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000); |
c98afbfc | 208 | else |
9538e1c2 | 209 | reg_set(client, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000); |
4e96fd08 GL |
210 | |
211 | return 0; | |
212 | } | |
213 | ||
214 | static unsigned long mt9t031_query_bus_param(struct soc_camera_device *icd) | |
215 | { | |
40e2e092 | 216 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
4e96fd08 GL |
217 | |
218 | return soc_camera_apply_sensor_flags(icl, MT9T031_BUS_PARAM); | |
219 | } | |
220 | ||
70e1d353 GL |
221 | /* Round up minima and round down maxima */ |
222 | static void recalculate_limits(struct soc_camera_device *icd, | |
223 | u16 xskip, u16 yskip) | |
224 | { | |
a0705b07 GL |
225 | icd->rect_max.left = (MT9T031_COLUMN_SKIP + xskip - 1) / xskip; |
226 | icd->rect_max.top = (MT9T031_ROW_SKIP + yskip - 1) / yskip; | |
70e1d353 GL |
227 | icd->width_min = (MT9T031_MIN_WIDTH + xskip - 1) / xskip; |
228 | icd->height_min = (MT9T031_MIN_HEIGHT + yskip - 1) / yskip; | |
a0705b07 GL |
229 | icd->rect_max.width = MT9T031_MAX_WIDTH / xskip; |
230 | icd->rect_max.height = MT9T031_MAX_HEIGHT / yskip; | |
70e1d353 GL |
231 | } |
232 | ||
09e231b3 GL |
233 | static int mt9t031_set_params(struct soc_camera_device *icd, |
234 | struct v4l2_rect *rect, u16 xskip, u16 yskip) | |
4e96fd08 | 235 | { |
40e2e092 | 236 | struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd)); |
979ea1dd | 237 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
4e96fd08 | 238 | int ret; |
09e231b3 | 239 | u16 xbin, ybin, width, height, left, top; |
4e96fd08 GL |
240 | const u16 hblank = MT9T031_HORIZONTAL_BLANK, |
241 | vblank = MT9T031_VERTICAL_BLANK; | |
4e96fd08 | 242 | |
70e1d353 GL |
243 | width = rect->width * xskip; |
244 | height = rect->height * yskip; | |
245 | left = rect->left * xskip; | |
246 | top = rect->top * yskip; | |
247 | ||
4e96fd08 GL |
248 | xbin = min(xskip, (u16)3); |
249 | ybin = min(yskip, (u16)3); | |
250 | ||
70e1d353 GL |
251 | dev_dbg(&icd->dev, "xskip %u, width %u/%u, yskip %u, height %u/%u\n", |
252 | xskip, width, rect->width, yskip, height, rect->height); | |
4e96fd08 | 253 | |
70e1d353 | 254 | /* Could just do roundup(rect->left, [xy]bin * 2); but this is cheaper */ |
4e96fd08 GL |
255 | switch (xbin) { |
256 | case 2: | |
70e1d353 | 257 | left = (left + 3) & ~3; |
4e96fd08 GL |
258 | break; |
259 | case 3: | |
70e1d353 | 260 | left = roundup(left, 6); |
4e96fd08 GL |
261 | } |
262 | ||
263 | switch (ybin) { | |
264 | case 2: | |
70e1d353 | 265 | top = (top + 3) & ~3; |
4e96fd08 GL |
266 | break; |
267 | case 3: | |
70e1d353 | 268 | top = roundup(top, 6); |
4e96fd08 GL |
269 | } |
270 | ||
70e1d353 | 271 | /* Disable register update, reconfigure atomically */ |
9538e1c2 | 272 | ret = reg_set(client, MT9T031_OUTPUT_CONTROL, 1); |
70e1d353 GL |
273 | if (ret < 0) |
274 | return ret; | |
275 | ||
4e96fd08 | 276 | /* Blanking and start values - default... */ |
9538e1c2 | 277 | ret = reg_write(client, MT9T031_HORIZONTAL_BLANKING, hblank); |
4e96fd08 | 278 | if (ret >= 0) |
9538e1c2 | 279 | ret = reg_write(client, MT9T031_VERTICAL_BLANKING, vblank); |
4e96fd08 | 280 | |
09e231b3 | 281 | if (yskip != mt9t031->yskip || xskip != mt9t031->xskip) { |
4e96fd08 GL |
282 | /* Binning, skipping */ |
283 | if (ret >= 0) | |
9538e1c2 | 284 | ret = reg_write(client, MT9T031_COLUMN_ADDRESS_MODE, |
4e96fd08 GL |
285 | ((xbin - 1) << 4) | (xskip - 1)); |
286 | if (ret >= 0) | |
9538e1c2 | 287 | ret = reg_write(client, MT9T031_ROW_ADDRESS_MODE, |
4e96fd08 GL |
288 | ((ybin - 1) << 4) | (yskip - 1)); |
289 | } | |
70e1d353 | 290 | dev_dbg(&icd->dev, "new physical left %u, top %u\n", left, top); |
4e96fd08 GL |
291 | |
292 | /* The caller provides a supported format, as guaranteed by | |
293 | * icd->try_fmt_cap(), soc_camera_s_crop() and soc_camera_cropcap() */ | |
294 | if (ret >= 0) | |
9538e1c2 | 295 | ret = reg_write(client, MT9T031_COLUMN_START, left); |
4e96fd08 | 296 | if (ret >= 0) |
9538e1c2 | 297 | ret = reg_write(client, MT9T031_ROW_START, top); |
4e96fd08 | 298 | if (ret >= 0) |
9538e1c2 | 299 | ret = reg_write(client, MT9T031_WINDOW_WIDTH, width - 1); |
4e96fd08 | 300 | if (ret >= 0) |
9538e1c2 | 301 | ret = reg_write(client, MT9T031_WINDOW_HEIGHT, |
4e96fd08 GL |
302 | height + icd->y_skip_top - 1); |
303 | if (ret >= 0 && mt9t031->autoexposure) { | |
9538e1c2 | 304 | ret = set_shutter(client, height + icd->y_skip_top + vblank); |
4e96fd08 GL |
305 | if (ret >= 0) { |
306 | const u32 shutter_max = MT9T031_MAX_HEIGHT + vblank; | |
307 | const struct v4l2_queryctrl *qctrl = | |
308 | soc_camera_find_qctrl(icd->ops, | |
309 | V4L2_CID_EXPOSURE); | |
310 | icd->exposure = (shutter_max / 2 + (height + | |
311 | icd->y_skip_top + vblank - 1) * | |
312 | (qctrl->maximum - qctrl->minimum)) / | |
313 | shutter_max + qctrl->minimum; | |
314 | } | |
315 | } | |
316 | ||
09e231b3 GL |
317 | /* Re-enable register update, commit all changes */ |
318 | if (ret >= 0) | |
9538e1c2 | 319 | ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 1); |
09e231b3 GL |
320 | |
321 | return ret < 0 ? ret : 0; | |
322 | } | |
323 | ||
08590b96 | 324 | static int mt9t031_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) |
09e231b3 | 325 | { |
08590b96 GL |
326 | struct v4l2_rect *rect = &a->c; |
327 | struct i2c_client *client = sd->priv; | |
979ea1dd | 328 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
08590b96 | 329 | struct soc_camera_device *icd = client->dev.platform_data; |
09e231b3 | 330 | |
e330919a GL |
331 | /* Make sure we don't exceed sensor limits */ |
332 | if (rect->left + rect->width > icd->rect_max.left + icd->rect_max.width) | |
333 | rect->left = icd->rect_max.width + icd->rect_max.left - | |
334 | rect->width; | |
335 | ||
336 | if (rect->top + rect->height > icd->rect_max.height + icd->rect_max.top) | |
337 | rect->top = icd->rect_max.height + icd->rect_max.top - | |
338 | rect->height; | |
339 | ||
09e231b3 GL |
340 | /* CROP - no change in scaling, or in limits */ |
341 | return mt9t031_set_params(icd, rect, mt9t031->xskip, mt9t031->yskip); | |
342 | } | |
343 | ||
979ea1dd | 344 | static int mt9t031_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *f) |
09e231b3 | 345 | { |
979ea1dd GL |
346 | struct i2c_client *client = sd->priv; |
347 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
348 | struct soc_camera_device *icd = client->dev.platform_data; | |
09e231b3 GL |
349 | int ret; |
350 | u16 xskip, yskip; | |
351 | struct v4l2_rect rect = { | |
a0705b07 GL |
352 | .left = icd->rect_current.left, |
353 | .top = icd->rect_current.top, | |
09e231b3 GL |
354 | .width = f->fmt.pix.width, |
355 | .height = f->fmt.pix.height, | |
356 | }; | |
357 | ||
358 | /* | |
359 | * try_fmt has put rectangle within limits. | |
360 | * S_FMT - use binning and skipping for scaling, recalculate | |
361 | * limits, used for cropping | |
362 | */ | |
363 | /* Is this more optimal than just a division? */ | |
364 | for (xskip = 8; xskip > 1; xskip--) | |
365 | if (rect.width * xskip <= MT9T031_MAX_WIDTH) | |
366 | break; | |
367 | ||
368 | for (yskip = 8; yskip > 1; yskip--) | |
369 | if (rect.height * yskip <= MT9T031_MAX_HEIGHT) | |
370 | break; | |
371 | ||
372 | recalculate_limits(icd, xskip, yskip); | |
373 | ||
374 | ret = mt9t031_set_params(icd, &rect, xskip, yskip); | |
375 | if (!ret) { | |
4e96fd08 GL |
376 | mt9t031->xskip = xskip; |
377 | mt9t031->yskip = yskip; | |
378 | } | |
379 | ||
09e231b3 | 380 | return ret; |
4e96fd08 GL |
381 | } |
382 | ||
979ea1dd | 383 | static int mt9t031_try_fmt(struct v4l2_subdev *sd, struct v4l2_format *f) |
4e96fd08 GL |
384 | { |
385 | struct v4l2_pix_format *pix = &f->fmt.pix; | |
386 | ||
653dc59b TP |
387 | v4l_bound_align_image( |
388 | &pix->width, MT9T031_MIN_WIDTH, MT9T031_MAX_WIDTH, 1, | |
389 | &pix->height, MT9T031_MIN_HEIGHT, MT9T031_MAX_HEIGHT, 1, 0); | |
4e96fd08 GL |
390 | |
391 | return 0; | |
392 | } | |
393 | ||
979ea1dd GL |
394 | static int mt9t031_g_chip_ident(struct v4l2_subdev *sd, |
395 | struct v4l2_dbg_chip_ident *id) | |
4e96fd08 | 396 | { |
979ea1dd GL |
397 | struct i2c_client *client = sd->priv; |
398 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
4e96fd08 | 399 | |
aecde8b5 | 400 | if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR) |
4e96fd08 GL |
401 | return -EINVAL; |
402 | ||
40e2e092 | 403 | if (id->match.addr != client->addr) |
4e96fd08 GL |
404 | return -ENODEV; |
405 | ||
406 | id->ident = mt9t031->model; | |
407 | id->revision = 0; | |
408 | ||
409 | return 0; | |
410 | } | |
411 | ||
412 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
979ea1dd GL |
413 | static int mt9t031_g_register(struct v4l2_subdev *sd, |
414 | struct v4l2_dbg_register *reg) | |
4e96fd08 | 415 | { |
979ea1dd | 416 | struct i2c_client *client = sd->priv; |
4e96fd08 | 417 | |
aecde8b5 | 418 | if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) |
4e96fd08 GL |
419 | return -EINVAL; |
420 | ||
9538e1c2 | 421 | if (reg->match.addr != client->addr) |
4e96fd08 GL |
422 | return -ENODEV; |
423 | ||
9538e1c2 | 424 | reg->val = reg_read(client, reg->reg); |
4e96fd08 GL |
425 | |
426 | if (reg->val > 0xffff) | |
427 | return -EIO; | |
428 | ||
429 | return 0; | |
430 | } | |
431 | ||
979ea1dd GL |
432 | static int mt9t031_s_register(struct v4l2_subdev *sd, |
433 | struct v4l2_dbg_register *reg) | |
4e96fd08 | 434 | { |
979ea1dd | 435 | struct i2c_client *client = sd->priv; |
4e96fd08 | 436 | |
aecde8b5 | 437 | if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) |
4e96fd08 GL |
438 | return -EINVAL; |
439 | ||
9538e1c2 | 440 | if (reg->match.addr != client->addr) |
4e96fd08 GL |
441 | return -ENODEV; |
442 | ||
9538e1c2 | 443 | if (reg_write(client, reg->reg, reg->val) < 0) |
4e96fd08 GL |
444 | return -EIO; |
445 | ||
446 | return 0; | |
447 | } | |
448 | #endif | |
449 | ||
450 | static const struct v4l2_queryctrl mt9t031_controls[] = { | |
451 | { | |
452 | .id = V4L2_CID_VFLIP, | |
453 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
454 | .name = "Flip Vertically", | |
455 | .minimum = 0, | |
456 | .maximum = 1, | |
457 | .step = 1, | |
458 | .default_value = 0, | |
70e1d353 GL |
459 | }, { |
460 | .id = V4L2_CID_HFLIP, | |
461 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
462 | .name = "Flip Horizontally", | |
463 | .minimum = 0, | |
464 | .maximum = 1, | |
465 | .step = 1, | |
466 | .default_value = 0, | |
4e96fd08 GL |
467 | }, { |
468 | .id = V4L2_CID_GAIN, | |
469 | .type = V4L2_CTRL_TYPE_INTEGER, | |
470 | .name = "Gain", | |
471 | .minimum = 0, | |
472 | .maximum = 127, | |
473 | .step = 1, | |
474 | .default_value = 64, | |
475 | .flags = V4L2_CTRL_FLAG_SLIDER, | |
476 | }, { | |
477 | .id = V4L2_CID_EXPOSURE, | |
478 | .type = V4L2_CTRL_TYPE_INTEGER, | |
479 | .name = "Exposure", | |
480 | .minimum = 1, | |
481 | .maximum = 255, | |
482 | .step = 1, | |
483 | .default_value = 255, | |
484 | .flags = V4L2_CTRL_FLAG_SLIDER, | |
485 | }, { | |
486 | .id = V4L2_CID_EXPOSURE_AUTO, | |
487 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
488 | .name = "Automatic Exposure", | |
489 | .minimum = 0, | |
490 | .maximum = 1, | |
491 | .step = 1, | |
492 | .default_value = 1, | |
493 | } | |
494 | }; | |
495 | ||
4e96fd08 | 496 | static struct soc_camera_ops mt9t031_ops = { |
4e96fd08 GL |
497 | .init = mt9t031_init, |
498 | .release = mt9t031_release, | |
4e96fd08 GL |
499 | .set_bus_param = mt9t031_set_bus_param, |
500 | .query_bus_param = mt9t031_query_bus_param, | |
501 | .controls = mt9t031_controls, | |
502 | .num_controls = ARRAY_SIZE(mt9t031_controls), | |
4e96fd08 GL |
503 | }; |
504 | ||
979ea1dd | 505 | static int mt9t031_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
4e96fd08 | 506 | { |
979ea1dd GL |
507 | struct i2c_client *client = sd->priv; |
508 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
4e96fd08 GL |
509 | int data; |
510 | ||
511 | switch (ctrl->id) { | |
512 | case V4L2_CID_VFLIP: | |
9538e1c2 | 513 | data = reg_read(client, MT9T031_READ_MODE_2); |
4e96fd08 GL |
514 | if (data < 0) |
515 | return -EIO; | |
516 | ctrl->value = !!(data & 0x8000); | |
517 | break; | |
518 | case V4L2_CID_HFLIP: | |
9538e1c2 | 519 | data = reg_read(client, MT9T031_READ_MODE_2); |
4e96fd08 GL |
520 | if (data < 0) |
521 | return -EIO; | |
522 | ctrl->value = !!(data & 0x4000); | |
523 | break; | |
524 | case V4L2_CID_EXPOSURE_AUTO: | |
525 | ctrl->value = mt9t031->autoexposure; | |
526 | break; | |
527 | } | |
528 | return 0; | |
529 | } | |
530 | ||
979ea1dd | 531 | static int mt9t031_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
4e96fd08 | 532 | { |
979ea1dd GL |
533 | struct i2c_client *client = sd->priv; |
534 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
535 | struct soc_camera_device *icd = client->dev.platform_data; | |
4e96fd08 GL |
536 | const struct v4l2_queryctrl *qctrl; |
537 | int data; | |
538 | ||
539 | qctrl = soc_camera_find_qctrl(&mt9t031_ops, ctrl->id); | |
540 | ||
541 | if (!qctrl) | |
542 | return -EINVAL; | |
543 | ||
544 | switch (ctrl->id) { | |
545 | case V4L2_CID_VFLIP: | |
546 | if (ctrl->value) | |
9538e1c2 | 547 | data = reg_set(client, MT9T031_READ_MODE_2, 0x8000); |
4e96fd08 | 548 | else |
9538e1c2 | 549 | data = reg_clear(client, MT9T031_READ_MODE_2, 0x8000); |
4e96fd08 GL |
550 | if (data < 0) |
551 | return -EIO; | |
552 | break; | |
553 | case V4L2_CID_HFLIP: | |
554 | if (ctrl->value) | |
9538e1c2 | 555 | data = reg_set(client, MT9T031_READ_MODE_2, 0x4000); |
4e96fd08 | 556 | else |
9538e1c2 | 557 | data = reg_clear(client, MT9T031_READ_MODE_2, 0x4000); |
4e96fd08 GL |
558 | if (data < 0) |
559 | return -EIO; | |
560 | break; | |
561 | case V4L2_CID_GAIN: | |
562 | if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum) | |
563 | return -EINVAL; | |
564 | /* See Datasheet Table 7, Gain settings. */ | |
565 | if (ctrl->value <= qctrl->default_value) { | |
566 | /* Pack it into 0..1 step 0.125, register values 0..8 */ | |
567 | unsigned long range = qctrl->default_value - qctrl->minimum; | |
568 | data = ((ctrl->value - qctrl->minimum) * 8 + range / 2) / range; | |
569 | ||
570 | dev_dbg(&icd->dev, "Setting gain %d\n", data); | |
9538e1c2 | 571 | data = reg_write(client, MT9T031_GLOBAL_GAIN, data); |
4e96fd08 GL |
572 | if (data < 0) |
573 | return -EIO; | |
574 | } else { | |
70e1d353 | 575 | /* Pack it into 1.125..128 variable step, register values 9..0x7860 */ |
4e96fd08 GL |
576 | /* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */ |
577 | unsigned long range = qctrl->maximum - qctrl->default_value - 1; | |
70e1d353 | 578 | /* calculated gain: map 65..127 to 9..1024 step 0.125 */ |
4e96fd08 | 579 | unsigned long gain = ((ctrl->value - qctrl->default_value - 1) * |
70e1d353 | 580 | 1015 + range / 2) / range + 9; |
4e96fd08 | 581 | |
70e1d353 | 582 | if (gain <= 32) /* calculated gain 9..32 -> 9..32 */ |
4e96fd08 | 583 | data = gain; |
70e1d353 | 584 | else if (gain <= 64) /* calculated gain 33..64 -> 0x51..0x60 */ |
4e96fd08 GL |
585 | data = ((gain - 32) * 16 + 16) / 32 + 80; |
586 | else | |
70e1d353 GL |
587 | /* calculated gain 65..1024 -> (1..120) << 8 + 0x60 */ |
588 | data = (((gain - 64 + 7) * 32) & 0xff00) | 0x60; | |
4e96fd08 | 589 | |
70e1d353 | 590 | dev_dbg(&icd->dev, "Setting gain from 0x%x to 0x%x\n", |
9538e1c2 GL |
591 | reg_read(client, MT9T031_GLOBAL_GAIN), data); |
592 | data = reg_write(client, MT9T031_GLOBAL_GAIN, data); | |
4e96fd08 GL |
593 | if (data < 0) |
594 | return -EIO; | |
595 | } | |
596 | ||
597 | /* Success */ | |
598 | icd->gain = ctrl->value; | |
599 | break; | |
600 | case V4L2_CID_EXPOSURE: | |
601 | /* mt9t031 has maximum == default */ | |
602 | if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum) | |
603 | return -EINVAL; | |
604 | else { | |
605 | const unsigned long range = qctrl->maximum - qctrl->minimum; | |
606 | const u32 shutter = ((ctrl->value - qctrl->minimum) * 1048 + | |
607 | range / 2) / range + 1; | |
608 | u32 old; | |
609 | ||
9538e1c2 | 610 | get_shutter(client, &old); |
4e96fd08 GL |
611 | dev_dbg(&icd->dev, "Setting shutter width from %u to %u\n", |
612 | old, shutter); | |
9538e1c2 | 613 | if (set_shutter(client, shutter) < 0) |
4e96fd08 GL |
614 | return -EIO; |
615 | icd->exposure = ctrl->value; | |
616 | mt9t031->autoexposure = 0; | |
617 | } | |
618 | break; | |
619 | case V4L2_CID_EXPOSURE_AUTO: | |
620 | if (ctrl->value) { | |
621 | const u16 vblank = MT9T031_VERTICAL_BLANK; | |
622 | const u32 shutter_max = MT9T031_MAX_HEIGHT + vblank; | |
a0705b07 | 623 | if (set_shutter(client, icd->rect_current.height + |
4e96fd08 GL |
624 | icd->y_skip_top + vblank) < 0) |
625 | return -EIO; | |
626 | qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE); | |
a0705b07 GL |
627 | icd->exposure = (shutter_max / 2 + |
628 | (icd->rect_current.height + | |
629 | icd->y_skip_top + vblank - 1) * | |
4e96fd08 GL |
630 | (qctrl->maximum - qctrl->minimum)) / |
631 | shutter_max + qctrl->minimum; | |
632 | mt9t031->autoexposure = 1; | |
633 | } else | |
634 | mt9t031->autoexposure = 0; | |
635 | break; | |
636 | } | |
637 | return 0; | |
638 | } | |
639 | ||
640 | /* Interface active, can use i2c. If it fails, it can indeed mean, that | |
641 | * this wasn't our capture interface, so, we wait for the right one */ | |
979ea1dd | 642 | static int mt9t031_video_probe(struct i2c_client *client) |
4e96fd08 | 643 | { |
979ea1dd GL |
644 | struct soc_camera_device *icd = client->dev.platform_data; |
645 | struct mt9t031 *mt9t031 = to_mt9t031(client); | |
4e96fd08 | 646 | s32 data; |
4e96fd08 GL |
647 | |
648 | /* We must have a parent by now. And it cannot be a wrong one. | |
649 | * So this entire test is completely redundant. */ | |
650 | if (!icd->dev.parent || | |
651 | to_soc_camera_host(icd->dev.parent)->nr != icd->iface) | |
652 | return -ENODEV; | |
653 | ||
654 | /* Enable the chip */ | |
9538e1c2 | 655 | data = reg_write(client, MT9T031_CHIP_ENABLE, 1); |
4e96fd08 GL |
656 | dev_dbg(&icd->dev, "write: %d\n", data); |
657 | ||
658 | /* Read out the chip version register */ | |
9538e1c2 | 659 | data = reg_read(client, MT9T031_CHIP_VERSION); |
4e96fd08 GL |
660 | |
661 | switch (data) { | |
662 | case 0x1621: | |
663 | mt9t031->model = V4L2_IDENT_MT9T031; | |
664 | icd->formats = mt9t031_colour_formats; | |
665 | icd->num_formats = ARRAY_SIZE(mt9t031_colour_formats); | |
666 | break; | |
667 | default: | |
4e96fd08 GL |
668 | dev_err(&icd->dev, |
669 | "No MT9T031 chip detected, register read %x\n", data); | |
40e2e092 | 670 | return -ENODEV; |
4e96fd08 GL |
671 | } |
672 | ||
673 | dev_info(&icd->dev, "Detected a MT9T031 chip ID %x\n", data); | |
674 | ||
4e96fd08 | 675 | return 0; |
4e96fd08 GL |
676 | } |
677 | ||
979ea1dd GL |
678 | static struct v4l2_subdev_core_ops mt9t031_subdev_core_ops = { |
679 | .g_ctrl = mt9t031_g_ctrl, | |
680 | .s_ctrl = mt9t031_s_ctrl, | |
681 | .g_chip_ident = mt9t031_g_chip_ident, | |
682 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
683 | .g_register = mt9t031_g_register, | |
684 | .s_register = mt9t031_s_register, | |
685 | #endif | |
686 | }; | |
687 | ||
688 | static struct v4l2_subdev_video_ops mt9t031_subdev_video_ops = { | |
689 | .s_stream = mt9t031_s_stream, | |
690 | .s_fmt = mt9t031_s_fmt, | |
691 | .try_fmt = mt9t031_try_fmt, | |
08590b96 | 692 | .s_crop = mt9t031_s_crop, |
979ea1dd GL |
693 | }; |
694 | ||
695 | static struct v4l2_subdev_ops mt9t031_subdev_ops = { | |
696 | .core = &mt9t031_subdev_core_ops, | |
697 | .video = &mt9t031_subdev_video_ops, | |
698 | }; | |
699 | ||
4e96fd08 GL |
700 | static int mt9t031_probe(struct i2c_client *client, |
701 | const struct i2c_device_id *did) | |
702 | { | |
703 | struct mt9t031 *mt9t031; | |
40e2e092 | 704 | struct soc_camera_device *icd = client->dev.platform_data; |
4e96fd08 | 705 | struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); |
40e2e092 | 706 | struct soc_camera_link *icl; |
4e96fd08 GL |
707 | int ret; |
708 | ||
40e2e092 GL |
709 | if (!icd) { |
710 | dev_err(&client->dev, "MT9T031: missing soc-camera data!\n"); | |
711 | return -EINVAL; | |
712 | } | |
713 | ||
714 | icl = to_soc_camera_link(icd); | |
4e96fd08 GL |
715 | if (!icl) { |
716 | dev_err(&client->dev, "MT9T031 driver needs platform data\n"); | |
717 | return -EINVAL; | |
718 | } | |
719 | ||
720 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) { | |
721 | dev_warn(&adapter->dev, | |
722 | "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n"); | |
723 | return -EIO; | |
724 | } | |
725 | ||
726 | mt9t031 = kzalloc(sizeof(struct mt9t031), GFP_KERNEL); | |
727 | if (!mt9t031) | |
728 | return -ENOMEM; | |
729 | ||
979ea1dd | 730 | v4l2_i2c_subdev_init(&mt9t031->subdev, client, &mt9t031_subdev_ops); |
4e96fd08 GL |
731 | |
732 | /* Second stage probe - when a capture adapter is there */ | |
a0705b07 GL |
733 | icd->ops = &mt9t031_ops; |
734 | icd->rect_max.left = MT9T031_COLUMN_SKIP; | |
735 | icd->rect_max.top = MT9T031_ROW_SKIP; | |
736 | icd->rect_current.left = icd->rect_max.left; | |
737 | icd->rect_current.top = icd->rect_max.top; | |
738 | icd->width_min = MT9T031_MIN_WIDTH; | |
739 | icd->rect_max.width = MT9T031_MAX_WIDTH; | |
740 | icd->height_min = MT9T031_MIN_HEIGHT; | |
741 | icd->rect_max.height = MT9T031_MAX_HEIGHT; | |
742 | icd->y_skip_top = 0; | |
4e96fd08 GL |
743 | /* Simulated autoexposure. If enabled, we calculate shutter width |
744 | * ourselves in the driver based on vertical blanking and frame width */ | |
745 | mt9t031->autoexposure = 1; | |
746 | ||
747 | mt9t031->xskip = 1; | |
748 | mt9t031->yskip = 1; | |
749 | ||
979ea1dd GL |
750 | mt9t031_idle(client); |
751 | ||
752 | ret = mt9t031_video_probe(client); | |
753 | ||
754 | mt9t031_disable(client); | |
755 | ||
40e2e092 GL |
756 | if (ret) { |
757 | icd->ops = NULL; | |
758 | i2c_set_clientdata(client, NULL); | |
759 | kfree(mt9t031); | |
760 | } | |
4e96fd08 | 761 | |
4e96fd08 GL |
762 | return ret; |
763 | } | |
764 | ||
765 | static int mt9t031_remove(struct i2c_client *client) | |
766 | { | |
979ea1dd | 767 | struct mt9t031 *mt9t031 = to_mt9t031(client); |
40e2e092 | 768 | struct soc_camera_device *icd = client->dev.platform_data; |
4e96fd08 | 769 | |
40e2e092 | 770 | icd->ops = NULL; |
4e96fd08 | 771 | i2c_set_clientdata(client, NULL); |
40e2e092 | 772 | client->driver = NULL; |
4e96fd08 GL |
773 | kfree(mt9t031); |
774 | ||
775 | return 0; | |
776 | } | |
777 | ||
778 | static const struct i2c_device_id mt9t031_id[] = { | |
779 | { "mt9t031", 0 }, | |
780 | { } | |
781 | }; | |
782 | MODULE_DEVICE_TABLE(i2c, mt9t031_id); | |
783 | ||
784 | static struct i2c_driver mt9t031_i2c_driver = { | |
785 | .driver = { | |
786 | .name = "mt9t031", | |
787 | }, | |
788 | .probe = mt9t031_probe, | |
789 | .remove = mt9t031_remove, | |
790 | .id_table = mt9t031_id, | |
791 | }; | |
792 | ||
793 | static int __init mt9t031_mod_init(void) | |
794 | { | |
795 | return i2c_add_driver(&mt9t031_i2c_driver); | |
796 | } | |
797 | ||
798 | static void __exit mt9t031_mod_exit(void) | |
799 | { | |
800 | i2c_del_driver(&mt9t031_i2c_driver); | |
801 | } | |
802 | ||
803 | module_init(mt9t031_mod_init); | |
804 | module_exit(mt9t031_mod_exit); | |
805 | ||
806 | MODULE_DESCRIPTION("Micron MT9T031 Camera driver"); | |
807 | MODULE_AUTHOR("Guennadi Liakhovetski <lg@denx.de>"); | |
808 | MODULE_LICENSE("GPL v2"); |