diff options
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/media/video/Kconfig | 6 | ||||
-rw-r--r-- | drivers/media/video/Makefile | 1 | ||||
-rw-r--r-- | drivers/media/video/mt9t031.c | 736 |
3 files changed, 743 insertions, 0 deletions
diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig index 9785eeb1ed44..19cf3b8f67c4 100644 --- a/drivers/media/video/Kconfig +++ b/drivers/media/video/Kconfig | |||
@@ -741,6 +741,12 @@ config SOC_CAMERA_MT9M111 | |||
741 | help | 741 | help |
742 | This driver supports MT9M111 and MT9M112 cameras from Micron | 742 | This driver supports MT9M111 and MT9M112 cameras from Micron |
743 | 743 | ||
744 | config SOC_CAMERA_MT9T031 | ||
745 | tristate "mt9t031 support" | ||
746 | depends on SOC_CAMERA && I2C | ||
747 | help | ||
748 | This driver supports MT9T031 cameras from Micron. | ||
749 | |||
744 | config SOC_CAMERA_MT9V022 | 750 | config SOC_CAMERA_MT9V022 |
745 | tristate "mt9v022 support" | 751 | tristate "mt9v022 support" |
746 | depends on SOC_CAMERA && I2C | 752 | depends on SOC_CAMERA && I2C |
diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile index 40c69afcde7a..1611c33b1aee 100644 --- a/drivers/media/video/Makefile +++ b/drivers/media/video/Makefile | |||
@@ -137,6 +137,7 @@ obj-$(CONFIG_VIDEO_OMAP2) += omap2cam.o | |||
137 | obj-$(CONFIG_SOC_CAMERA) += soc_camera.o | 137 | obj-$(CONFIG_SOC_CAMERA) += soc_camera.o |
138 | obj-$(CONFIG_SOC_CAMERA_MT9M001) += mt9m001.o | 138 | obj-$(CONFIG_SOC_CAMERA_MT9M001) += mt9m001.o |
139 | obj-$(CONFIG_SOC_CAMERA_MT9M111) += mt9m111.o | 139 | obj-$(CONFIG_SOC_CAMERA_MT9M111) += mt9m111.o |
140 | obj-$(CONFIG_SOC_CAMERA_MT9T031) += mt9t031.o | ||
140 | obj-$(CONFIG_SOC_CAMERA_MT9V022) += mt9v022.o | 141 | obj-$(CONFIG_SOC_CAMERA_MT9V022) += mt9v022.o |
141 | obj-$(CONFIG_SOC_CAMERA_OV772X) += ov772x.o | 142 | obj-$(CONFIG_SOC_CAMERA_OV772X) += ov772x.o |
142 | obj-$(CONFIG_SOC_CAMERA_PLATFORM) += soc_camera_platform.o | 143 | obj-$(CONFIG_SOC_CAMERA_PLATFORM) += soc_camera_platform.o |
diff --git a/drivers/media/video/mt9t031.c b/drivers/media/video/mt9t031.c new file mode 100644 index 000000000000..1a9d53966d06 --- /dev/null +++ b/drivers/media/video/mt9t031.c | |||
@@ -0,0 +1,736 @@ | |||
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 | |||
16 | #include <media/v4l2-common.h> | ||
17 | #include <media/v4l2-chip-ident.h> | ||
18 | #include <media/soc_camera.h> | ||
19 | |||
20 | /* mt9t031 i2c address 0x5d | ||
21 | * The platform has to define i2c_board_info | ||
22 | * and call i2c_register_board_info() */ | ||
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 { | ||
71 | struct i2c_client *client; | ||
72 | struct soc_camera_device icd; | ||
73 | int model; /* V4L2_IDENT_MT9T031* codes from v4l2-chip-ident.h */ | ||
74 | unsigned char autoexposure; | ||
75 | u16 xskip; | ||
76 | u16 yskip; | ||
77 | }; | ||
78 | |||
79 | static int reg_read(struct soc_camera_device *icd, const u8 reg) | ||
80 | { | ||
81 | struct mt9t031 *mt9t031 = container_of(icd, struct mt9t031, icd); | ||
82 | struct i2c_client *client = mt9t031->client; | ||
83 | s32 data = i2c_smbus_read_word_data(client, reg); | ||
84 | return data < 0 ? data : swab16(data); | ||
85 | } | ||
86 | |||
87 | static int reg_write(struct soc_camera_device *icd, const u8 reg, | ||
88 | const u16 data) | ||
89 | { | ||
90 | struct mt9t031 *mt9t031 = container_of(icd, struct mt9t031, icd); | ||
91 | return i2c_smbus_write_word_data(mt9t031->client, reg, swab16(data)); | ||
92 | } | ||
93 | |||
94 | static int reg_set(struct soc_camera_device *icd, const u8 reg, | ||
95 | const u16 data) | ||
96 | { | ||
97 | int ret; | ||
98 | |||
99 | ret = reg_read(icd, reg); | ||
100 | if (ret < 0) | ||
101 | return ret; | ||
102 | return reg_write(icd, reg, ret | data); | ||
103 | } | ||
104 | |||
105 | static int reg_clear(struct soc_camera_device *icd, const u8 reg, | ||
106 | const u16 data) | ||
107 | { | ||
108 | int ret; | ||
109 | |||
110 | ret = reg_read(icd, reg); | ||
111 | if (ret < 0) | ||
112 | return ret; | ||
113 | return reg_write(icd, reg, ret & ~data); | ||
114 | } | ||
115 | |||
116 | static int set_shutter(struct soc_camera_device *icd, const u32 data) | ||
117 | { | ||
118 | int ret; | ||
119 | |||
120 | ret = reg_write(icd, MT9T031_SHUTTER_WIDTH_UPPER, data >> 16); | ||
121 | |||
122 | if (ret >= 0) | ||
123 | ret = reg_write(icd, MT9T031_SHUTTER_WIDTH, data & 0xffff); | ||
124 | |||
125 | return ret; | ||
126 | } | ||
127 | |||
128 | static int get_shutter(struct soc_camera_device *icd, u32 *data) | ||
129 | { | ||
130 | int ret; | ||
131 | |||
132 | ret = reg_read(icd, MT9T031_SHUTTER_WIDTH_UPPER); | ||
133 | *data = ret << 16; | ||
134 | |||
135 | if (ret >= 0) | ||
136 | ret = reg_read(icd, MT9T031_SHUTTER_WIDTH); | ||
137 | *data |= ret & 0xffff; | ||
138 | |||
139 | return ret < 0 ? ret : 0; | ||
140 | } | ||
141 | |||
142 | static int mt9t031_init(struct soc_camera_device *icd) | ||
143 | { | ||
144 | int ret; | ||
145 | |||
146 | /* Disable chip output, synchronous option update */ | ||
147 | dev_dbg(icd->vdev->parent, "%s\n", __func__); | ||
148 | |||
149 | ret = reg_write(icd, MT9T031_RESET, 1); | ||
150 | if (ret >= 0) | ||
151 | ret = reg_write(icd, MT9T031_RESET, 0); | ||
152 | if (ret >= 0) | ||
153 | ret = reg_clear(icd, MT9T031_OUTPUT_CONTROL, 3); | ||
154 | |||
155 | return ret >= 0 ? 0 : -EIO; | ||
156 | } | ||
157 | |||
158 | static int mt9t031_release(struct soc_camera_device *icd) | ||
159 | { | ||
160 | /* Disable the chip */ | ||
161 | reg_clear(icd, MT9T031_OUTPUT_CONTROL, 3); | ||
162 | return 0; | ||
163 | } | ||
164 | |||
165 | static int mt9t031_start_capture(struct soc_camera_device *icd) | ||
166 | { | ||
167 | /* Switch to master "normal" mode */ | ||
168 | if (reg_set(icd, MT9T031_OUTPUT_CONTROL, 3) < 0) | ||
169 | return -EIO; | ||
170 | return 0; | ||
171 | } | ||
172 | |||
173 | static int mt9t031_stop_capture(struct soc_camera_device *icd) | ||
174 | { | ||
175 | /* Stop sensor readout */ | ||
176 | if (reg_clear(icd, MT9T031_OUTPUT_CONTROL, 3) < 0) | ||
177 | return -EIO; | ||
178 | return 0; | ||
179 | } | ||
180 | |||
181 | static int mt9t031_set_bus_param(struct soc_camera_device *icd, | ||
182 | unsigned long flags) | ||
183 | { | ||
184 | /* The caller should have queried our parameters, check anyway */ | ||
185 | if (flags & ~MT9T031_BUS_PARAM) | ||
186 | return -EINVAL; | ||
187 | |||
188 | if (flags & SOCAM_PCLK_SAMPLE_FALLING) | ||
189 | reg_set(icd, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000); | ||
190 | else | ||
191 | reg_clear(icd, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000); | ||
192 | |||
193 | return 0; | ||
194 | } | ||
195 | |||
196 | static unsigned long mt9t031_query_bus_param(struct soc_camera_device *icd) | ||
197 | { | ||
198 | struct mt9t031 *mt9t031 = container_of(icd, struct mt9t031, icd); | ||
199 | struct soc_camera_link *icl = mt9t031->client->dev.platform_data; | ||
200 | |||
201 | return soc_camera_apply_sensor_flags(icl, MT9T031_BUS_PARAM); | ||
202 | } | ||
203 | |||
204 | static int mt9t031_set_fmt(struct soc_camera_device *icd, | ||
205 | __u32 pixfmt, struct v4l2_rect *rect) | ||
206 | { | ||
207 | struct mt9t031 *mt9t031 = container_of(icd, struct mt9t031, icd); | ||
208 | int ret; | ||
209 | const u16 hblank = MT9T031_HORIZONTAL_BLANK, | ||
210 | vblank = MT9T031_VERTICAL_BLANK; | ||
211 | u16 xbin, xskip = mt9t031->xskip, ybin, yskip = mt9t031->yskip, | ||
212 | width = rect->width * xskip, height = rect->height * yskip; | ||
213 | |||
214 | if (pixfmt) { | ||
215 | /* S_FMT - use binning and skipping for scaling, recalculate */ | ||
216 | /* Is this more optimal than just a division? */ | ||
217 | for (xskip = 8; xskip > 1; xskip--) | ||
218 | if (rect->width * xskip <= icd->width_max) | ||
219 | break; | ||
220 | |||
221 | for (yskip = 8; yskip > 1; yskip--) | ||
222 | if (rect->height * yskip <= icd->height_max) | ||
223 | break; | ||
224 | |||
225 | width = rect->width * xskip; | ||
226 | height = rect->height * yskip; | ||
227 | |||
228 | dev_dbg(&icd->dev, "xskip %u, width %u, yskip %u, height %u\n", | ||
229 | xskip, width, yskip, height); | ||
230 | } | ||
231 | |||
232 | xbin = min(xskip, (u16)3); | ||
233 | ybin = min(yskip, (u16)3); | ||
234 | |||
235 | /* Make sure we don't exceed frame limits */ | ||
236 | if (rect->left + width > icd->width_max) | ||
237 | rect->left = (icd->width_max - width) / 2; | ||
238 | |||
239 | if (rect->top + height > icd->height_max) | ||
240 | rect->top = (icd->height_max - height) / 2; | ||
241 | |||
242 | /* Could just do roundup(rect->left, [xy]bin); but this is cheaper */ | ||
243 | switch (xbin) { | ||
244 | case 2: | ||
245 | rect->left = (rect->left + 1) & ~1; | ||
246 | break; | ||
247 | case 3: | ||
248 | rect->left = roundup(rect->left, 3); | ||
249 | } | ||
250 | |||
251 | switch (ybin) { | ||
252 | case 2: | ||
253 | rect->top = (rect->top + 1) & ~1; | ||
254 | break; | ||
255 | case 3: | ||
256 | rect->top = roundup(rect->top, 3); | ||
257 | } | ||
258 | |||
259 | /* Blanking and start values - default... */ | ||
260 | ret = reg_write(icd, MT9T031_HORIZONTAL_BLANKING, hblank); | ||
261 | if (ret >= 0) | ||
262 | ret = reg_write(icd, MT9T031_VERTICAL_BLANKING, vblank); | ||
263 | |||
264 | if (pixfmt) { | ||
265 | /* Binning, skipping */ | ||
266 | if (ret >= 0) | ||
267 | ret = reg_write(icd, MT9T031_COLUMN_ADDRESS_MODE, | ||
268 | ((xbin - 1) << 4) | (xskip - 1)); | ||
269 | if (ret >= 0) | ||
270 | ret = reg_write(icd, MT9T031_ROW_ADDRESS_MODE, | ||
271 | ((ybin - 1) << 4) | (yskip - 1)); | ||
272 | } | ||
273 | dev_dbg(&icd->dev, "new left %u, top %u\n", rect->left, rect->top); | ||
274 | |||
275 | /* The caller provides a supported format, as guaranteed by | ||
276 | * icd->try_fmt_cap(), soc_camera_s_crop() and soc_camera_cropcap() */ | ||
277 | if (ret >= 0) | ||
278 | ret = reg_write(icd, MT9T031_COLUMN_START, rect->left); | ||
279 | if (ret >= 0) | ||
280 | ret = reg_write(icd, MT9T031_ROW_START, rect->top); | ||
281 | if (ret >= 0) | ||
282 | ret = reg_write(icd, MT9T031_WINDOW_WIDTH, width - 1); | ||
283 | if (ret >= 0) | ||
284 | ret = reg_write(icd, MT9T031_WINDOW_HEIGHT, | ||
285 | height + icd->y_skip_top - 1); | ||
286 | if (ret >= 0 && mt9t031->autoexposure) { | ||
287 | ret = set_shutter(icd, height + icd->y_skip_top + vblank); | ||
288 | if (ret >= 0) { | ||
289 | const u32 shutter_max = MT9T031_MAX_HEIGHT + vblank; | ||
290 | const struct v4l2_queryctrl *qctrl = | ||
291 | soc_camera_find_qctrl(icd->ops, | ||
292 | V4L2_CID_EXPOSURE); | ||
293 | icd->exposure = (shutter_max / 2 + (height + | ||
294 | icd->y_skip_top + vblank - 1) * | ||
295 | (qctrl->maximum - qctrl->minimum)) / | ||
296 | shutter_max + qctrl->minimum; | ||
297 | } | ||
298 | } | ||
299 | |||
300 | if (!ret && pixfmt) { | ||
301 | mt9t031->xskip = xskip; | ||
302 | mt9t031->yskip = yskip; | ||
303 | } | ||
304 | |||
305 | return ret < 0 ? ret : 0; | ||
306 | } | ||
307 | |||
308 | static int mt9t031_try_fmt(struct soc_camera_device *icd, | ||
309 | struct v4l2_format *f) | ||
310 | { | ||
311 | struct v4l2_pix_format *pix = &f->fmt.pix; | ||
312 | |||
313 | if (pix->height < icd->height_min) | ||
314 | pix->height = icd->height_min; | ||
315 | if (pix->height > icd->height_max) | ||
316 | pix->height = icd->height_max; | ||
317 | if (pix->width < icd->width_min) | ||
318 | pix->width = icd->width_min; | ||
319 | if (pix->width > icd->width_max) | ||
320 | pix->width = icd->width_max; | ||
321 | |||
322 | pix->width &= ~0x01; /* has to be even */ | ||
323 | pix->height &= ~0x01; /* has to be even */ | ||
324 | |||
325 | return 0; | ||
326 | } | ||
327 | |||
328 | static int mt9t031_get_chip_id(struct soc_camera_device *icd, | ||
329 | struct v4l2_chip_ident *id) | ||
330 | { | ||
331 | struct mt9t031 *mt9t031 = container_of(icd, struct mt9t031, icd); | ||
332 | |||
333 | if (id->match_type != V4L2_CHIP_MATCH_I2C_ADDR) | ||
334 | return -EINVAL; | ||
335 | |||
336 | if (id->match_chip != mt9t031->client->addr) | ||
337 | return -ENODEV; | ||
338 | |||
339 | id->ident = mt9t031->model; | ||
340 | id->revision = 0; | ||
341 | |||
342 | return 0; | ||
343 | } | ||
344 | |||
345 | #ifdef CONFIG_VIDEO_ADV_DEBUG | ||
346 | static int mt9t031_get_register(struct soc_camera_device *icd, | ||
347 | struct v4l2_register *reg) | ||
348 | { | ||
349 | struct mt9t031 *mt9t031 = container_of(icd, struct mt9t031, icd); | ||
350 | |||
351 | if (reg->match_type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) | ||
352 | return -EINVAL; | ||
353 | |||
354 | if (reg->match_chip != mt9t031->client->addr) | ||
355 | return -ENODEV; | ||
356 | |||
357 | reg->val = reg_read(icd, reg->reg); | ||
358 | |||
359 | if (reg->val > 0xffff) | ||
360 | return -EIO; | ||
361 | |||
362 | return 0; | ||
363 | } | ||
364 | |||
365 | static int mt9t031_set_register(struct soc_camera_device *icd, | ||
366 | struct v4l2_register *reg) | ||
367 | { | ||
368 | struct mt9t031 *mt9t031 = container_of(icd, struct mt9t031, icd); | ||
369 | |||
370 | if (reg->match_type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) | ||
371 | return -EINVAL; | ||
372 | |||
373 | if (reg->match_chip != mt9t031->client->addr) | ||
374 | return -ENODEV; | ||
375 | |||
376 | if (reg_write(icd, reg->reg, reg->val) < 0) | ||
377 | return -EIO; | ||
378 | |||
379 | return 0; | ||
380 | } | ||
381 | #endif | ||
382 | |||
383 | static const struct v4l2_queryctrl mt9t031_controls[] = { | ||
384 | { | ||
385 | .id = V4L2_CID_VFLIP, | ||
386 | .type = V4L2_CTRL_TYPE_BOOLEAN, | ||
387 | .name = "Flip Vertically", | ||
388 | .minimum = 0, | ||
389 | .maximum = 1, | ||
390 | .step = 1, | ||
391 | .default_value = 0, | ||
392 | }, { | ||
393 | .id = V4L2_CID_GAIN, | ||
394 | .type = V4L2_CTRL_TYPE_INTEGER, | ||
395 | .name = "Gain", | ||
396 | .minimum = 0, | ||
397 | .maximum = 127, | ||
398 | .step = 1, | ||
399 | .default_value = 64, | ||
400 | .flags = V4L2_CTRL_FLAG_SLIDER, | ||
401 | }, { | ||
402 | .id = V4L2_CID_EXPOSURE, | ||
403 | .type = V4L2_CTRL_TYPE_INTEGER, | ||
404 | .name = "Exposure", | ||
405 | .minimum = 1, | ||
406 | .maximum = 255, | ||
407 | .step = 1, | ||
408 | .default_value = 255, | ||
409 | .flags = V4L2_CTRL_FLAG_SLIDER, | ||
410 | }, { | ||
411 | .id = V4L2_CID_EXPOSURE_AUTO, | ||
412 | .type = V4L2_CTRL_TYPE_BOOLEAN, | ||
413 | .name = "Automatic Exposure", | ||
414 | .minimum = 0, | ||
415 | .maximum = 1, | ||
416 | .step = 1, | ||
417 | .default_value = 1, | ||
418 | } | ||
419 | }; | ||
420 | |||
421 | static int mt9t031_video_probe(struct soc_camera_device *); | ||
422 | static void mt9t031_video_remove(struct soc_camera_device *); | ||
423 | static int mt9t031_get_control(struct soc_camera_device *, struct v4l2_control *); | ||
424 | static int mt9t031_set_control(struct soc_camera_device *, struct v4l2_control *); | ||
425 | |||
426 | static struct soc_camera_ops mt9t031_ops = { | ||
427 | .owner = THIS_MODULE, | ||
428 | .probe = mt9t031_video_probe, | ||
429 | .remove = mt9t031_video_remove, | ||
430 | .init = mt9t031_init, | ||
431 | .release = mt9t031_release, | ||
432 | .start_capture = mt9t031_start_capture, | ||
433 | .stop_capture = mt9t031_stop_capture, | ||
434 | .set_fmt = mt9t031_set_fmt, | ||
435 | .try_fmt = mt9t031_try_fmt, | ||
436 | .set_bus_param = mt9t031_set_bus_param, | ||
437 | .query_bus_param = mt9t031_query_bus_param, | ||
438 | .controls = mt9t031_controls, | ||
439 | .num_controls = ARRAY_SIZE(mt9t031_controls), | ||
440 | .get_control = mt9t031_get_control, | ||
441 | .set_control = mt9t031_set_control, | ||
442 | .get_chip_id = mt9t031_get_chip_id, | ||
443 | #ifdef CONFIG_VIDEO_ADV_DEBUG | ||
444 | .get_register = mt9t031_get_register, | ||
445 | .set_register = mt9t031_set_register, | ||
446 | #endif | ||
447 | }; | ||
448 | |||
449 | static int mt9t031_get_control(struct soc_camera_device *icd, struct v4l2_control *ctrl) | ||
450 | { | ||
451 | struct mt9t031 *mt9t031 = container_of(icd, struct mt9t031, icd); | ||
452 | int data; | ||
453 | |||
454 | switch (ctrl->id) { | ||
455 | case V4L2_CID_VFLIP: | ||
456 | data = reg_read(icd, MT9T031_READ_MODE_2); | ||
457 | if (data < 0) | ||
458 | return -EIO; | ||
459 | ctrl->value = !!(data & 0x8000); | ||
460 | break; | ||
461 | case V4L2_CID_HFLIP: | ||
462 | data = reg_read(icd, MT9T031_READ_MODE_2); | ||
463 | if (data < 0) | ||
464 | return -EIO; | ||
465 | ctrl->value = !!(data & 0x4000); | ||
466 | break; | ||
467 | case V4L2_CID_EXPOSURE_AUTO: | ||
468 | ctrl->value = mt9t031->autoexposure; | ||
469 | break; | ||
470 | } | ||
471 | return 0; | ||
472 | } | ||
473 | |||
474 | static int mt9t031_set_control(struct soc_camera_device *icd, struct v4l2_control *ctrl) | ||
475 | { | ||
476 | struct mt9t031 *mt9t031 = container_of(icd, struct mt9t031, icd); | ||
477 | const struct v4l2_queryctrl *qctrl; | ||
478 | int data; | ||
479 | |||
480 | qctrl = soc_camera_find_qctrl(&mt9t031_ops, ctrl->id); | ||
481 | |||
482 | if (!qctrl) | ||
483 | return -EINVAL; | ||
484 | |||
485 | switch (ctrl->id) { | ||
486 | case V4L2_CID_VFLIP: | ||
487 | if (ctrl->value) | ||
488 | data = reg_set(icd, MT9T031_READ_MODE_2, 0x8000); | ||
489 | else | ||
490 | data = reg_clear(icd, MT9T031_READ_MODE_2, 0x8000); | ||
491 | if (data < 0) | ||
492 | return -EIO; | ||
493 | break; | ||
494 | case V4L2_CID_HFLIP: | ||
495 | if (ctrl->value) | ||
496 | data = reg_set(icd, MT9T031_READ_MODE_2, 0x4000); | ||
497 | else | ||
498 | data = reg_clear(icd, MT9T031_READ_MODE_2, 0x4000); | ||
499 | if (data < 0) | ||
500 | return -EIO; | ||
501 | break; | ||
502 | case V4L2_CID_GAIN: | ||
503 | if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum) | ||
504 | return -EINVAL; | ||
505 | /* See Datasheet Table 7, Gain settings. */ | ||
506 | if (ctrl->value <= qctrl->default_value) { | ||
507 | /* Pack it into 0..1 step 0.125, register values 0..8 */ | ||
508 | unsigned long range = qctrl->default_value - qctrl->minimum; | ||
509 | data = ((ctrl->value - qctrl->minimum) * 8 + range / 2) / range; | ||
510 | |||
511 | dev_dbg(&icd->dev, "Setting gain %d\n", data); | ||
512 | data = reg_write(icd, MT9T031_GLOBAL_GAIN, data); | ||
513 | if (data < 0) | ||
514 | return -EIO; | ||
515 | } else { | ||
516 | /* Pack it into 1.125..15 variable step, register values 9..67 */ | ||
517 | /* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */ | ||
518 | unsigned long range = qctrl->maximum - qctrl->default_value - 1; | ||
519 | unsigned long gain = ((ctrl->value - qctrl->default_value - 1) * | ||
520 | 111 + range / 2) / range + 9; | ||
521 | |||
522 | if (gain <= 32) | ||
523 | data = gain; | ||
524 | else if (gain <= 64) | ||
525 | data = ((gain - 32) * 16 + 16) / 32 + 80; | ||
526 | else | ||
527 | data = ((gain - 64) * 7 + 28) / 56 + 96; | ||
528 | |||
529 | dev_dbg(&icd->dev, "Setting gain from %d to %d\n", | ||
530 | reg_read(icd, MT9T031_GLOBAL_GAIN), data); | ||
531 | data = reg_write(icd, MT9T031_GLOBAL_GAIN, data); | ||
532 | if (data < 0) | ||
533 | return -EIO; | ||
534 | } | ||
535 | |||
536 | /* Success */ | ||
537 | icd->gain = ctrl->value; | ||
538 | break; | ||
539 | case V4L2_CID_EXPOSURE: | ||
540 | /* mt9t031 has maximum == default */ | ||
541 | if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum) | ||
542 | return -EINVAL; | ||
543 | else { | ||
544 | const unsigned long range = qctrl->maximum - qctrl->minimum; | ||
545 | const u32 shutter = ((ctrl->value - qctrl->minimum) * 1048 + | ||
546 | range / 2) / range + 1; | ||
547 | u32 old; | ||
548 | |||
549 | get_shutter(icd, &old); | ||
550 | dev_dbg(&icd->dev, "Setting shutter width from %u to %u\n", | ||
551 | old, shutter); | ||
552 | if (set_shutter(icd, shutter) < 0) | ||
553 | return -EIO; | ||
554 | icd->exposure = ctrl->value; | ||
555 | mt9t031->autoexposure = 0; | ||
556 | } | ||
557 | break; | ||
558 | case V4L2_CID_EXPOSURE_AUTO: | ||
559 | if (ctrl->value) { | ||
560 | const u16 vblank = MT9T031_VERTICAL_BLANK; | ||
561 | const u32 shutter_max = MT9T031_MAX_HEIGHT + vblank; | ||
562 | if (set_shutter(icd, icd->height + | ||
563 | icd->y_skip_top + vblank) < 0) | ||
564 | return -EIO; | ||
565 | qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE); | ||
566 | icd->exposure = (shutter_max / 2 + (icd->height + | ||
567 | icd->y_skip_top + vblank - 1) * | ||
568 | (qctrl->maximum - qctrl->minimum)) / | ||
569 | shutter_max + qctrl->minimum; | ||
570 | mt9t031->autoexposure = 1; | ||
571 | } else | ||
572 | mt9t031->autoexposure = 0; | ||
573 | break; | ||
574 | } | ||
575 | return 0; | ||
576 | } | ||
577 | |||
578 | /* Interface active, can use i2c. If it fails, it can indeed mean, that | ||
579 | * this wasn't our capture interface, so, we wait for the right one */ | ||
580 | static int mt9t031_video_probe(struct soc_camera_device *icd) | ||
581 | { | ||
582 | struct mt9t031 *mt9t031 = container_of(icd, struct mt9t031, icd); | ||
583 | s32 data; | ||
584 | int ret; | ||
585 | |||
586 | /* We must have a parent by now. And it cannot be a wrong one. | ||
587 | * So this entire test is completely redundant. */ | ||
588 | if (!icd->dev.parent || | ||
589 | to_soc_camera_host(icd->dev.parent)->nr != icd->iface) | ||
590 | return -ENODEV; | ||
591 | |||
592 | /* Enable the chip */ | ||
593 | data = reg_write(icd, MT9T031_CHIP_ENABLE, 1); | ||
594 | dev_dbg(&icd->dev, "write: %d\n", data); | ||
595 | |||
596 | /* Read out the chip version register */ | ||
597 | data = reg_read(icd, MT9T031_CHIP_VERSION); | ||
598 | |||
599 | switch (data) { | ||
600 | case 0x1621: | ||
601 | mt9t031->model = V4L2_IDENT_MT9T031; | ||
602 | icd->formats = mt9t031_colour_formats; | ||
603 | icd->num_formats = ARRAY_SIZE(mt9t031_colour_formats); | ||
604 | break; | ||
605 | default: | ||
606 | ret = -ENODEV; | ||
607 | dev_err(&icd->dev, | ||
608 | "No MT9T031 chip detected, register read %x\n", data); | ||
609 | goto ei2c; | ||
610 | } | ||
611 | |||
612 | dev_info(&icd->dev, "Detected a MT9T031 chip ID %x\n", data); | ||
613 | |||
614 | /* Now that we know the model, we can start video */ | ||
615 | ret = soc_camera_video_start(icd); | ||
616 | if (ret) | ||
617 | goto evstart; | ||
618 | |||
619 | return 0; | ||
620 | |||
621 | evstart: | ||
622 | ei2c: | ||
623 | return ret; | ||
624 | } | ||
625 | |||
626 | static void mt9t031_video_remove(struct soc_camera_device *icd) | ||
627 | { | ||
628 | struct mt9t031 *mt9t031 = container_of(icd, struct mt9t031, icd); | ||
629 | |||
630 | dev_dbg(&icd->dev, "Video %x removed: %p, %p\n", mt9t031->client->addr, | ||
631 | icd->dev.parent, icd->vdev); | ||
632 | soc_camera_video_stop(icd); | ||
633 | } | ||
634 | |||
635 | static int mt9t031_probe(struct i2c_client *client, | ||
636 | const struct i2c_device_id *did) | ||
637 | { | ||
638 | struct mt9t031 *mt9t031; | ||
639 | struct soc_camera_device *icd; | ||
640 | struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); | ||
641 | struct soc_camera_link *icl = client->dev.platform_data; | ||
642 | int ret; | ||
643 | |||
644 | if (!icl) { | ||
645 | dev_err(&client->dev, "MT9T031 driver needs platform data\n"); | ||
646 | return -EINVAL; | ||
647 | } | ||
648 | |||
649 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) { | ||
650 | dev_warn(&adapter->dev, | ||
651 | "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n"); | ||
652 | return -EIO; | ||
653 | } | ||
654 | |||
655 | mt9t031 = kzalloc(sizeof(struct mt9t031), GFP_KERNEL); | ||
656 | if (!mt9t031) | ||
657 | return -ENOMEM; | ||
658 | |||
659 | mt9t031->client = client; | ||
660 | i2c_set_clientdata(client, mt9t031); | ||
661 | |||
662 | /* Second stage probe - when a capture adapter is there */ | ||
663 | icd = &mt9t031->icd; | ||
664 | icd->ops = &mt9t031_ops; | ||
665 | icd->control = &client->dev; | ||
666 | icd->x_min = MT9T031_COLUMN_SKIP; | ||
667 | icd->y_min = MT9T031_ROW_SKIP; | ||
668 | icd->x_current = icd->x_min; | ||
669 | icd->y_current = icd->y_min; | ||
670 | icd->width_min = MT9T031_MIN_WIDTH; | ||
671 | icd->width_max = MT9T031_MAX_WIDTH; | ||
672 | icd->height_min = MT9T031_MIN_HEIGHT; | ||
673 | icd->height_max = MT9T031_MAX_HEIGHT; | ||
674 | icd->y_skip_top = 0; | ||
675 | icd->iface = icl->bus_id; | ||
676 | /* Simulated autoexposure. If enabled, we calculate shutter width | ||
677 | * ourselves in the driver based on vertical blanking and frame width */ | ||
678 | mt9t031->autoexposure = 1; | ||
679 | |||
680 | mt9t031->xskip = 1; | ||
681 | mt9t031->yskip = 1; | ||
682 | |||
683 | ret = soc_camera_device_register(icd); | ||
684 | if (ret) | ||
685 | goto eisdr; | ||
686 | |||
687 | return 0; | ||
688 | |||
689 | eisdr: | ||
690 | i2c_set_clientdata(client, NULL); | ||
691 | kfree(mt9t031); | ||
692 | return ret; | ||
693 | } | ||
694 | |||
695 | static int mt9t031_remove(struct i2c_client *client) | ||
696 | { | ||
697 | struct mt9t031 *mt9t031 = i2c_get_clientdata(client); | ||
698 | |||
699 | soc_camera_device_unregister(&mt9t031->icd); | ||
700 | i2c_set_clientdata(client, NULL); | ||
701 | kfree(mt9t031); | ||
702 | |||
703 | return 0; | ||
704 | } | ||
705 | |||
706 | static const struct i2c_device_id mt9t031_id[] = { | ||
707 | { "mt9t031", 0 }, | ||
708 | { } | ||
709 | }; | ||
710 | MODULE_DEVICE_TABLE(i2c, mt9t031_id); | ||
711 | |||
712 | static struct i2c_driver mt9t031_i2c_driver = { | ||
713 | .driver = { | ||
714 | .name = "mt9t031", | ||
715 | }, | ||
716 | .probe = mt9t031_probe, | ||
717 | .remove = mt9t031_remove, | ||
718 | .id_table = mt9t031_id, | ||
719 | }; | ||
720 | |||
721 | static int __init mt9t031_mod_init(void) | ||
722 | { | ||
723 | return i2c_add_driver(&mt9t031_i2c_driver); | ||
724 | } | ||
725 | |||
726 | static void __exit mt9t031_mod_exit(void) | ||
727 | { | ||
728 | i2c_del_driver(&mt9t031_i2c_driver); | ||
729 | } | ||
730 | |||
731 | module_init(mt9t031_mod_init); | ||
732 | module_exit(mt9t031_mod_exit); | ||
733 | |||
734 | MODULE_DESCRIPTION("Micron MT9T031 Camera driver"); | ||
735 | MODULE_AUTHOR("Guennadi Liakhovetski <lg@denx.de>"); | ||
736 | MODULE_LICENSE("GPL v2"); | ||