diff options
author | Jonathan Herman <hermanjl@cs.unc.edu> | 2013-01-22 10:38:37 -0500 |
---|---|---|
committer | Jonathan Herman <hermanjl@cs.unc.edu> | 2013-01-22 10:38:37 -0500 |
commit | fcc9d2e5a6c89d22b8b773a64fb4ad21ac318446 (patch) | |
tree | a57612d1888735a2ec7972891b68c1ac5ec8faea /drivers/media/video/mt9m001.c | |
parent | 8dea78da5cee153b8af9c07a2745f6c55057fe12 (diff) |
Diffstat (limited to 'drivers/media/video/mt9m001.c')
-rw-r--r-- | drivers/media/video/mt9m001.c | 832 |
1 files changed, 832 insertions, 0 deletions
diff --git a/drivers/media/video/mt9m001.c b/drivers/media/video/mt9m001.c new file mode 100644 index 00000000000..4da9cca939c --- /dev/null +++ b/drivers/media/video/mt9m001.c | |||
@@ -0,0 +1,832 @@ | |||
1 | /* | ||
2 | * Driver for MT9M001 CMOS Image Sensor from Micron | ||
3 | * | ||
4 | * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.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-subdev.h> | ||
17 | #include <media/v4l2-chip-ident.h> | ||
18 | #include <media/soc_camera.h> | ||
19 | |||
20 | /* | ||
21 | * mt9m001 i2c address 0x5d | ||
22 | * The platform has to define ctruct i2c_board_info objects and link to them | ||
23 | * from struct soc_camera_link | ||
24 | */ | ||
25 | |||
26 | /* mt9m001 selected register addresses */ | ||
27 | #define MT9M001_CHIP_VERSION 0x00 | ||
28 | #define MT9M001_ROW_START 0x01 | ||
29 | #define MT9M001_COLUMN_START 0x02 | ||
30 | #define MT9M001_WINDOW_HEIGHT 0x03 | ||
31 | #define MT9M001_WINDOW_WIDTH 0x04 | ||
32 | #define MT9M001_HORIZONTAL_BLANKING 0x05 | ||
33 | #define MT9M001_VERTICAL_BLANKING 0x06 | ||
34 | #define MT9M001_OUTPUT_CONTROL 0x07 | ||
35 | #define MT9M001_SHUTTER_WIDTH 0x09 | ||
36 | #define MT9M001_FRAME_RESTART 0x0b | ||
37 | #define MT9M001_SHUTTER_DELAY 0x0c | ||
38 | #define MT9M001_RESET 0x0d | ||
39 | #define MT9M001_READ_OPTIONS1 0x1e | ||
40 | #define MT9M001_READ_OPTIONS2 0x20 | ||
41 | #define MT9M001_GLOBAL_GAIN 0x35 | ||
42 | #define MT9M001_CHIP_ENABLE 0xF1 | ||
43 | |||
44 | #define MT9M001_MAX_WIDTH 1280 | ||
45 | #define MT9M001_MAX_HEIGHT 1024 | ||
46 | #define MT9M001_MIN_WIDTH 48 | ||
47 | #define MT9M001_MIN_HEIGHT 32 | ||
48 | #define MT9M001_COLUMN_SKIP 20 | ||
49 | #define MT9M001_ROW_SKIP 12 | ||
50 | |||
51 | /* MT9M001 has only one fixed colorspace per pixelcode */ | ||
52 | struct mt9m001_datafmt { | ||
53 | enum v4l2_mbus_pixelcode code; | ||
54 | enum v4l2_colorspace colorspace; | ||
55 | }; | ||
56 | |||
57 | /* Find a data format by a pixel code in an array */ | ||
58 | static const struct mt9m001_datafmt *mt9m001_find_datafmt( | ||
59 | enum v4l2_mbus_pixelcode code, const struct mt9m001_datafmt *fmt, | ||
60 | int n) | ||
61 | { | ||
62 | int i; | ||
63 | for (i = 0; i < n; i++) | ||
64 | if (fmt[i].code == code) | ||
65 | return fmt + i; | ||
66 | |||
67 | return NULL; | ||
68 | } | ||
69 | |||
70 | static const struct mt9m001_datafmt mt9m001_colour_fmts[] = { | ||
71 | /* | ||
72 | * Order important: first natively supported, | ||
73 | * second supported with a GPIO extender | ||
74 | */ | ||
75 | {V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_COLORSPACE_SRGB}, | ||
76 | {V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB}, | ||
77 | }; | ||
78 | |||
79 | static const struct mt9m001_datafmt mt9m001_monochrome_fmts[] = { | ||
80 | /* Order important - see above */ | ||
81 | {V4L2_MBUS_FMT_Y10_1X10, V4L2_COLORSPACE_JPEG}, | ||
82 | {V4L2_MBUS_FMT_Y8_1X8, V4L2_COLORSPACE_JPEG}, | ||
83 | }; | ||
84 | |||
85 | struct mt9m001 { | ||
86 | struct v4l2_subdev subdev; | ||
87 | struct v4l2_rect rect; /* Sensor window */ | ||
88 | const struct mt9m001_datafmt *fmt; | ||
89 | const struct mt9m001_datafmt *fmts; | ||
90 | int num_fmts; | ||
91 | int model; /* V4L2_IDENT_MT9M001* codes from v4l2-chip-ident.h */ | ||
92 | unsigned int gain; | ||
93 | unsigned int exposure; | ||
94 | unsigned short y_skip_top; /* Lines to skip at the top */ | ||
95 | unsigned char autoexposure; | ||
96 | }; | ||
97 | |||
98 | static struct mt9m001 *to_mt9m001(const struct i2c_client *client) | ||
99 | { | ||
100 | return container_of(i2c_get_clientdata(client), struct mt9m001, subdev); | ||
101 | } | ||
102 | |||
103 | static int reg_read(struct i2c_client *client, const u8 reg) | ||
104 | { | ||
105 | s32 data = i2c_smbus_read_word_data(client, reg); | ||
106 | return data < 0 ? data : swab16(data); | ||
107 | } | ||
108 | |||
109 | static int reg_write(struct i2c_client *client, const u8 reg, | ||
110 | const u16 data) | ||
111 | { | ||
112 | return i2c_smbus_write_word_data(client, reg, swab16(data)); | ||
113 | } | ||
114 | |||
115 | static int reg_set(struct i2c_client *client, const u8 reg, | ||
116 | const u16 data) | ||
117 | { | ||
118 | int ret; | ||
119 | |||
120 | ret = reg_read(client, reg); | ||
121 | if (ret < 0) | ||
122 | return ret; | ||
123 | return reg_write(client, reg, ret | data); | ||
124 | } | ||
125 | |||
126 | static int reg_clear(struct i2c_client *client, const u8 reg, | ||
127 | const u16 data) | ||
128 | { | ||
129 | int ret; | ||
130 | |||
131 | ret = reg_read(client, reg); | ||
132 | if (ret < 0) | ||
133 | return ret; | ||
134 | return reg_write(client, reg, ret & ~data); | ||
135 | } | ||
136 | |||
137 | static int mt9m001_init(struct i2c_client *client) | ||
138 | { | ||
139 | int ret; | ||
140 | |||
141 | dev_dbg(&client->dev, "%s\n", __func__); | ||
142 | |||
143 | /* | ||
144 | * We don't know, whether platform provides reset, issue a soft reset | ||
145 | * too. This returns all registers to their default values. | ||
146 | */ | ||
147 | ret = reg_write(client, MT9M001_RESET, 1); | ||
148 | if (!ret) | ||
149 | ret = reg_write(client, MT9M001_RESET, 0); | ||
150 | |||
151 | /* Disable chip, synchronous option update */ | ||
152 | if (!ret) | ||
153 | ret = reg_write(client, MT9M001_OUTPUT_CONTROL, 0); | ||
154 | |||
155 | return ret; | ||
156 | } | ||
157 | |||
158 | static int mt9m001_s_stream(struct v4l2_subdev *sd, int enable) | ||
159 | { | ||
160 | struct i2c_client *client = v4l2_get_subdevdata(sd); | ||
161 | |||
162 | /* Switch to master "normal" mode or stop sensor readout */ | ||
163 | if (reg_write(client, MT9M001_OUTPUT_CONTROL, enable ? 2 : 0) < 0) | ||
164 | return -EIO; | ||
165 | return 0; | ||
166 | } | ||
167 | |||
168 | static int mt9m001_set_bus_param(struct soc_camera_device *icd, | ||
169 | unsigned long flags) | ||
170 | { | ||
171 | struct soc_camera_link *icl = to_soc_camera_link(icd); | ||
172 | unsigned long width_flag = flags & SOCAM_DATAWIDTH_MASK; | ||
173 | |||
174 | /* Only one width bit may be set */ | ||
175 | if (!is_power_of_2(width_flag)) | ||
176 | return -EINVAL; | ||
177 | |||
178 | if (icl->set_bus_param) | ||
179 | return icl->set_bus_param(icl, width_flag); | ||
180 | |||
181 | /* | ||
182 | * Without board specific bus width settings we only support the | ||
183 | * sensors native bus width | ||
184 | */ | ||
185 | if (width_flag == SOCAM_DATAWIDTH_10) | ||
186 | return 0; | ||
187 | |||
188 | return -EINVAL; | ||
189 | } | ||
190 | |||
191 | static unsigned long mt9m001_query_bus_param(struct soc_camera_device *icd) | ||
192 | { | ||
193 | struct soc_camera_link *icl = to_soc_camera_link(icd); | ||
194 | /* MT9M001 has all capture_format parameters fixed */ | ||
195 | unsigned long flags = SOCAM_PCLK_SAMPLE_FALLING | | ||
196 | SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_HIGH | | ||
197 | SOCAM_DATA_ACTIVE_HIGH | SOCAM_MASTER; | ||
198 | |||
199 | if (icl->query_bus_param) | ||
200 | flags |= icl->query_bus_param(icl) & SOCAM_DATAWIDTH_MASK; | ||
201 | else | ||
202 | flags |= SOCAM_DATAWIDTH_10; | ||
203 | |||
204 | return soc_camera_apply_sensor_flags(icl, flags); | ||
205 | } | ||
206 | |||
207 | static int mt9m001_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) | ||
208 | { | ||
209 | struct i2c_client *client = v4l2_get_subdevdata(sd); | ||
210 | struct mt9m001 *mt9m001 = to_mt9m001(client); | ||
211 | struct v4l2_rect rect = a->c; | ||
212 | struct soc_camera_device *icd = client->dev.platform_data; | ||
213 | int ret; | ||
214 | const u16 hblank = 9, vblank = 25; | ||
215 | unsigned int total_h; | ||
216 | |||
217 | if (mt9m001->fmts == mt9m001_colour_fmts) | ||
218 | /* | ||
219 | * Bayer format - even number of rows for simplicity, | ||
220 | * but let the user play with the top row. | ||
221 | */ | ||
222 | rect.height = ALIGN(rect.height, 2); | ||
223 | |||
224 | /* Datasheet requirement: see register description */ | ||
225 | rect.width = ALIGN(rect.width, 2); | ||
226 | rect.left = ALIGN(rect.left, 2); | ||
227 | |||
228 | soc_camera_limit_side(&rect.left, &rect.width, | ||
229 | MT9M001_COLUMN_SKIP, MT9M001_MIN_WIDTH, MT9M001_MAX_WIDTH); | ||
230 | |||
231 | soc_camera_limit_side(&rect.top, &rect.height, | ||
232 | MT9M001_ROW_SKIP, MT9M001_MIN_HEIGHT, MT9M001_MAX_HEIGHT); | ||
233 | |||
234 | total_h = rect.height + mt9m001->y_skip_top + vblank; | ||
235 | |||
236 | /* Blanking and start values - default... */ | ||
237 | ret = reg_write(client, MT9M001_HORIZONTAL_BLANKING, hblank); | ||
238 | if (!ret) | ||
239 | ret = reg_write(client, MT9M001_VERTICAL_BLANKING, vblank); | ||
240 | |||
241 | /* | ||
242 | * The caller provides a supported format, as verified per | ||
243 | * call to icd->try_fmt() | ||
244 | */ | ||
245 | if (!ret) | ||
246 | ret = reg_write(client, MT9M001_COLUMN_START, rect.left); | ||
247 | if (!ret) | ||
248 | ret = reg_write(client, MT9M001_ROW_START, rect.top); | ||
249 | if (!ret) | ||
250 | ret = reg_write(client, MT9M001_WINDOW_WIDTH, rect.width - 1); | ||
251 | if (!ret) | ||
252 | ret = reg_write(client, MT9M001_WINDOW_HEIGHT, | ||
253 | rect.height + mt9m001->y_skip_top - 1); | ||
254 | if (!ret && mt9m001->autoexposure) { | ||
255 | ret = reg_write(client, MT9M001_SHUTTER_WIDTH, total_h); | ||
256 | if (!ret) { | ||
257 | const struct v4l2_queryctrl *qctrl = | ||
258 | soc_camera_find_qctrl(icd->ops, | ||
259 | V4L2_CID_EXPOSURE); | ||
260 | mt9m001->exposure = (524 + (total_h - 1) * | ||
261 | (qctrl->maximum - qctrl->minimum)) / | ||
262 | 1048 + qctrl->minimum; | ||
263 | } | ||
264 | } | ||
265 | |||
266 | if (!ret) | ||
267 | mt9m001->rect = rect; | ||
268 | |||
269 | return ret; | ||
270 | } | ||
271 | |||
272 | static int mt9m001_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) | ||
273 | { | ||
274 | struct i2c_client *client = v4l2_get_subdevdata(sd); | ||
275 | struct mt9m001 *mt9m001 = to_mt9m001(client); | ||
276 | |||
277 | a->c = mt9m001->rect; | ||
278 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | ||
279 | |||
280 | return 0; | ||
281 | } | ||
282 | |||
283 | static int mt9m001_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a) | ||
284 | { | ||
285 | a->bounds.left = MT9M001_COLUMN_SKIP; | ||
286 | a->bounds.top = MT9M001_ROW_SKIP; | ||
287 | a->bounds.width = MT9M001_MAX_WIDTH; | ||
288 | a->bounds.height = MT9M001_MAX_HEIGHT; | ||
289 | a->defrect = a->bounds; | ||
290 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | ||
291 | a->pixelaspect.numerator = 1; | ||
292 | a->pixelaspect.denominator = 1; | ||
293 | |||
294 | return 0; | ||
295 | } | ||
296 | |||
297 | static int mt9m001_g_fmt(struct v4l2_subdev *sd, | ||
298 | struct v4l2_mbus_framefmt *mf) | ||
299 | { | ||
300 | struct i2c_client *client = v4l2_get_subdevdata(sd); | ||
301 | struct mt9m001 *mt9m001 = to_mt9m001(client); | ||
302 | |||
303 | mf->width = mt9m001->rect.width; | ||
304 | mf->height = mt9m001->rect.height; | ||
305 | mf->code = mt9m001->fmt->code; | ||
306 | mf->colorspace = mt9m001->fmt->colorspace; | ||
307 | mf->field = V4L2_FIELD_NONE; | ||
308 | |||
309 | return 0; | ||
310 | } | ||
311 | |||
312 | static int mt9m001_s_fmt(struct v4l2_subdev *sd, | ||
313 | struct v4l2_mbus_framefmt *mf) | ||
314 | { | ||
315 | struct i2c_client *client = v4l2_get_subdevdata(sd); | ||
316 | struct mt9m001 *mt9m001 = to_mt9m001(client); | ||
317 | struct v4l2_crop a = { | ||
318 | .c = { | ||
319 | .left = mt9m001->rect.left, | ||
320 | .top = mt9m001->rect.top, | ||
321 | .width = mf->width, | ||
322 | .height = mf->height, | ||
323 | }, | ||
324 | }; | ||
325 | int ret; | ||
326 | |||
327 | /* No support for scaling so far, just crop. TODO: use skipping */ | ||
328 | ret = mt9m001_s_crop(sd, &a); | ||
329 | if (!ret) { | ||
330 | mf->width = mt9m001->rect.width; | ||
331 | mf->height = mt9m001->rect.height; | ||
332 | mt9m001->fmt = mt9m001_find_datafmt(mf->code, | ||
333 | mt9m001->fmts, mt9m001->num_fmts); | ||
334 | mf->colorspace = mt9m001->fmt->colorspace; | ||
335 | } | ||
336 | |||
337 | return ret; | ||
338 | } | ||
339 | |||
340 | static int mt9m001_try_fmt(struct v4l2_subdev *sd, | ||
341 | struct v4l2_mbus_framefmt *mf) | ||
342 | { | ||
343 | struct i2c_client *client = v4l2_get_subdevdata(sd); | ||
344 | struct mt9m001 *mt9m001 = to_mt9m001(client); | ||
345 | const struct mt9m001_datafmt *fmt; | ||
346 | |||
347 | v4l_bound_align_image(&mf->width, MT9M001_MIN_WIDTH, | ||
348 | MT9M001_MAX_WIDTH, 1, | ||
349 | &mf->height, MT9M001_MIN_HEIGHT + mt9m001->y_skip_top, | ||
350 | MT9M001_MAX_HEIGHT + mt9m001->y_skip_top, 0, 0); | ||
351 | |||
352 | if (mt9m001->fmts == mt9m001_colour_fmts) | ||
353 | mf->height = ALIGN(mf->height - 1, 2); | ||
354 | |||
355 | fmt = mt9m001_find_datafmt(mf->code, mt9m001->fmts, | ||
356 | mt9m001->num_fmts); | ||
357 | if (!fmt) { | ||
358 | fmt = mt9m001->fmt; | ||
359 | mf->code = fmt->code; | ||
360 | } | ||
361 | |||
362 | mf->colorspace = fmt->colorspace; | ||
363 | |||
364 | return 0; | ||
365 | } | ||
366 | |||
367 | static int mt9m001_g_chip_ident(struct v4l2_subdev *sd, | ||
368 | struct v4l2_dbg_chip_ident *id) | ||
369 | { | ||
370 | struct i2c_client *client = v4l2_get_subdevdata(sd); | ||
371 | struct mt9m001 *mt9m001 = to_mt9m001(client); | ||
372 | |||
373 | if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR) | ||
374 | return -EINVAL; | ||
375 | |||
376 | if (id->match.addr != client->addr) | ||
377 | return -ENODEV; | ||
378 | |||
379 | id->ident = mt9m001->model; | ||
380 | id->revision = 0; | ||
381 | |||
382 | return 0; | ||
383 | } | ||
384 | |||
385 | #ifdef CONFIG_VIDEO_ADV_DEBUG | ||
386 | static int mt9m001_g_register(struct v4l2_subdev *sd, | ||
387 | struct v4l2_dbg_register *reg) | ||
388 | { | ||
389 | struct i2c_client *client = v4l2_get_subdevdata(sd); | ||
390 | |||
391 | if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) | ||
392 | return -EINVAL; | ||
393 | |||
394 | if (reg->match.addr != client->addr) | ||
395 | return -ENODEV; | ||
396 | |||
397 | reg->size = 2; | ||
398 | reg->val = reg_read(client, reg->reg); | ||
399 | |||
400 | if (reg->val > 0xffff) | ||
401 | return -EIO; | ||
402 | |||
403 | return 0; | ||
404 | } | ||
405 | |||
406 | static int mt9m001_s_register(struct v4l2_subdev *sd, | ||
407 | struct v4l2_dbg_register *reg) | ||
408 | { | ||
409 | struct i2c_client *client = v4l2_get_subdevdata(sd); | ||
410 | |||
411 | if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) | ||
412 | return -EINVAL; | ||
413 | |||
414 | if (reg->match.addr != client->addr) | ||
415 | return -ENODEV; | ||
416 | |||
417 | if (reg_write(client, reg->reg, reg->val) < 0) | ||
418 | return -EIO; | ||
419 | |||
420 | return 0; | ||
421 | } | ||
422 | #endif | ||
423 | |||
424 | static const struct v4l2_queryctrl mt9m001_controls[] = { | ||
425 | { | ||
426 | .id = V4L2_CID_VFLIP, | ||
427 | .type = V4L2_CTRL_TYPE_BOOLEAN, | ||
428 | .name = "Flip Vertically", | ||
429 | .minimum = 0, | ||
430 | .maximum = 1, | ||
431 | .step = 1, | ||
432 | .default_value = 0, | ||
433 | }, { | ||
434 | .id = V4L2_CID_GAIN, | ||
435 | .type = V4L2_CTRL_TYPE_INTEGER, | ||
436 | .name = "Gain", | ||
437 | .minimum = 0, | ||
438 | .maximum = 127, | ||
439 | .step = 1, | ||
440 | .default_value = 64, | ||
441 | .flags = V4L2_CTRL_FLAG_SLIDER, | ||
442 | }, { | ||
443 | .id = V4L2_CID_EXPOSURE, | ||
444 | .type = V4L2_CTRL_TYPE_INTEGER, | ||
445 | .name = "Exposure", | ||
446 | .minimum = 1, | ||
447 | .maximum = 255, | ||
448 | .step = 1, | ||
449 | .default_value = 255, | ||
450 | .flags = V4L2_CTRL_FLAG_SLIDER, | ||
451 | }, { | ||
452 | .id = V4L2_CID_EXPOSURE_AUTO, | ||
453 | .type = V4L2_CTRL_TYPE_BOOLEAN, | ||
454 | .name = "Automatic Exposure", | ||
455 | .minimum = 0, | ||
456 | .maximum = 1, | ||
457 | .step = 1, | ||
458 | .default_value = 1, | ||
459 | } | ||
460 | }; | ||
461 | |||
462 | static struct soc_camera_ops mt9m001_ops = { | ||
463 | .set_bus_param = mt9m001_set_bus_param, | ||
464 | .query_bus_param = mt9m001_query_bus_param, | ||
465 | .controls = mt9m001_controls, | ||
466 | .num_controls = ARRAY_SIZE(mt9m001_controls), | ||
467 | }; | ||
468 | |||
469 | static int mt9m001_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) | ||
470 | { | ||
471 | struct i2c_client *client = v4l2_get_subdevdata(sd); | ||
472 | struct mt9m001 *mt9m001 = to_mt9m001(client); | ||
473 | int data; | ||
474 | |||
475 | switch (ctrl->id) { | ||
476 | case V4L2_CID_VFLIP: | ||
477 | data = reg_read(client, MT9M001_READ_OPTIONS2); | ||
478 | if (data < 0) | ||
479 | return -EIO; | ||
480 | ctrl->value = !!(data & 0x8000); | ||
481 | break; | ||
482 | case V4L2_CID_EXPOSURE_AUTO: | ||
483 | ctrl->value = mt9m001->autoexposure; | ||
484 | break; | ||
485 | case V4L2_CID_GAIN: | ||
486 | ctrl->value = mt9m001->gain; | ||
487 | break; | ||
488 | case V4L2_CID_EXPOSURE: | ||
489 | ctrl->value = mt9m001->exposure; | ||
490 | break; | ||
491 | } | ||
492 | return 0; | ||
493 | } | ||
494 | |||
495 | static int mt9m001_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) | ||
496 | { | ||
497 | struct i2c_client *client = v4l2_get_subdevdata(sd); | ||
498 | struct mt9m001 *mt9m001 = to_mt9m001(client); | ||
499 | struct soc_camera_device *icd = client->dev.platform_data; | ||
500 | const struct v4l2_queryctrl *qctrl; | ||
501 | int data; | ||
502 | |||
503 | qctrl = soc_camera_find_qctrl(&mt9m001_ops, ctrl->id); | ||
504 | |||
505 | if (!qctrl) | ||
506 | return -EINVAL; | ||
507 | |||
508 | switch (ctrl->id) { | ||
509 | case V4L2_CID_VFLIP: | ||
510 | if (ctrl->value) | ||
511 | data = reg_set(client, MT9M001_READ_OPTIONS2, 0x8000); | ||
512 | else | ||
513 | data = reg_clear(client, MT9M001_READ_OPTIONS2, 0x8000); | ||
514 | if (data < 0) | ||
515 | return -EIO; | ||
516 | break; | ||
517 | case V4L2_CID_GAIN: | ||
518 | if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum) | ||
519 | return -EINVAL; | ||
520 | /* See Datasheet Table 7, Gain settings. */ | ||
521 | if (ctrl->value <= qctrl->default_value) { | ||
522 | /* Pack it into 0..1 step 0.125, register values 0..8 */ | ||
523 | unsigned long range = qctrl->default_value - qctrl->minimum; | ||
524 | data = ((ctrl->value - qctrl->minimum) * 8 + range / 2) / range; | ||
525 | |||
526 | dev_dbg(&client->dev, "Setting gain %d\n", data); | ||
527 | data = reg_write(client, MT9M001_GLOBAL_GAIN, data); | ||
528 | if (data < 0) | ||
529 | return -EIO; | ||
530 | } else { | ||
531 | /* Pack it into 1.125..15 variable step, register values 9..67 */ | ||
532 | /* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */ | ||
533 | unsigned long range = qctrl->maximum - qctrl->default_value - 1; | ||
534 | unsigned long gain = ((ctrl->value - qctrl->default_value - 1) * | ||
535 | 111 + range / 2) / range + 9; | ||
536 | |||
537 | if (gain <= 32) | ||
538 | data = gain; | ||
539 | else if (gain <= 64) | ||
540 | data = ((gain - 32) * 16 + 16) / 32 + 80; | ||
541 | else | ||
542 | data = ((gain - 64) * 7 + 28) / 56 + 96; | ||
543 | |||
544 | dev_dbg(&client->dev, "Setting gain from %d to %d\n", | ||
545 | reg_read(client, MT9M001_GLOBAL_GAIN), data); | ||
546 | data = reg_write(client, MT9M001_GLOBAL_GAIN, data); | ||
547 | if (data < 0) | ||
548 | return -EIO; | ||
549 | } | ||
550 | |||
551 | /* Success */ | ||
552 | mt9m001->gain = ctrl->value; | ||
553 | break; | ||
554 | case V4L2_CID_EXPOSURE: | ||
555 | /* mt9m001 has maximum == default */ | ||
556 | if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum) | ||
557 | return -EINVAL; | ||
558 | else { | ||
559 | unsigned long range = qctrl->maximum - qctrl->minimum; | ||
560 | unsigned long shutter = ((ctrl->value - qctrl->minimum) * 1048 + | ||
561 | range / 2) / range + 1; | ||
562 | |||
563 | dev_dbg(&client->dev, | ||
564 | "Setting shutter width from %d to %lu\n", | ||
565 | reg_read(client, MT9M001_SHUTTER_WIDTH), | ||
566 | shutter); | ||
567 | if (reg_write(client, MT9M001_SHUTTER_WIDTH, shutter) < 0) | ||
568 | return -EIO; | ||
569 | mt9m001->exposure = ctrl->value; | ||
570 | mt9m001->autoexposure = 0; | ||
571 | } | ||
572 | break; | ||
573 | case V4L2_CID_EXPOSURE_AUTO: | ||
574 | if (ctrl->value) { | ||
575 | const u16 vblank = 25; | ||
576 | unsigned int total_h = mt9m001->rect.height + | ||
577 | mt9m001->y_skip_top + vblank; | ||
578 | if (reg_write(client, MT9M001_SHUTTER_WIDTH, | ||
579 | total_h) < 0) | ||
580 | return -EIO; | ||
581 | qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE); | ||
582 | mt9m001->exposure = (524 + (total_h - 1) * | ||
583 | (qctrl->maximum - qctrl->minimum)) / | ||
584 | 1048 + qctrl->minimum; | ||
585 | mt9m001->autoexposure = 1; | ||
586 | } else | ||
587 | mt9m001->autoexposure = 0; | ||
588 | break; | ||
589 | } | ||
590 | return 0; | ||
591 | } | ||
592 | |||
593 | /* | ||
594 | * Interface active, can use i2c. If it fails, it can indeed mean, that | ||
595 | * this wasn't our capture interface, so, we wait for the right one | ||
596 | */ | ||
597 | static int mt9m001_video_probe(struct soc_camera_device *icd, | ||
598 | struct i2c_client *client) | ||
599 | { | ||
600 | struct mt9m001 *mt9m001 = to_mt9m001(client); | ||
601 | struct soc_camera_link *icl = to_soc_camera_link(icd); | ||
602 | s32 data; | ||
603 | unsigned long flags; | ||
604 | int ret; | ||
605 | |||
606 | /* We must have a parent by now. And it cannot be a wrong one. */ | ||
607 | BUG_ON(!icd->parent || | ||
608 | to_soc_camera_host(icd->parent)->nr != icd->iface); | ||
609 | |||
610 | /* Enable the chip */ | ||
611 | data = reg_write(client, MT9M001_CHIP_ENABLE, 1); | ||
612 | dev_dbg(&client->dev, "write: %d\n", data); | ||
613 | |||
614 | /* Read out the chip version register */ | ||
615 | data = reg_read(client, MT9M001_CHIP_VERSION); | ||
616 | |||
617 | /* must be 0x8411 or 0x8421 for colour sensor and 8431 for bw */ | ||
618 | switch (data) { | ||
619 | case 0x8411: | ||
620 | case 0x8421: | ||
621 | mt9m001->model = V4L2_IDENT_MT9M001C12ST; | ||
622 | mt9m001->fmts = mt9m001_colour_fmts; | ||
623 | break; | ||
624 | case 0x8431: | ||
625 | mt9m001->model = V4L2_IDENT_MT9M001C12STM; | ||
626 | mt9m001->fmts = mt9m001_monochrome_fmts; | ||
627 | break; | ||
628 | default: | ||
629 | dev_err(&client->dev, | ||
630 | "No MT9M001 chip detected, register read %x\n", data); | ||
631 | return -ENODEV; | ||
632 | } | ||
633 | |||
634 | mt9m001->num_fmts = 0; | ||
635 | |||
636 | /* | ||
637 | * This is a 10bit sensor, so by default we only allow 10bit. | ||
638 | * The platform may support different bus widths due to | ||
639 | * different routing of the data lines. | ||
640 | */ | ||
641 | if (icl->query_bus_param) | ||
642 | flags = icl->query_bus_param(icl); | ||
643 | else | ||
644 | flags = SOCAM_DATAWIDTH_10; | ||
645 | |||
646 | if (flags & SOCAM_DATAWIDTH_10) | ||
647 | mt9m001->num_fmts++; | ||
648 | else | ||
649 | mt9m001->fmts++; | ||
650 | |||
651 | if (flags & SOCAM_DATAWIDTH_8) | ||
652 | mt9m001->num_fmts++; | ||
653 | |||
654 | mt9m001->fmt = &mt9m001->fmts[0]; | ||
655 | |||
656 | dev_info(&client->dev, "Detected a MT9M001 chip ID %x (%s)\n", data, | ||
657 | data == 0x8431 ? "C12STM" : "C12ST"); | ||
658 | |||
659 | ret = mt9m001_init(client); | ||
660 | if (ret < 0) | ||
661 | dev_err(&client->dev, "Failed to initialise the camera\n"); | ||
662 | |||
663 | /* mt9m001_init() has reset the chip, returning registers to defaults */ | ||
664 | mt9m001->gain = 64; | ||
665 | mt9m001->exposure = 255; | ||
666 | |||
667 | return ret; | ||
668 | } | ||
669 | |||
670 | static void mt9m001_video_remove(struct soc_camera_device *icd) | ||
671 | { | ||
672 | struct soc_camera_link *icl = to_soc_camera_link(icd); | ||
673 | |||
674 | dev_dbg(icd->pdev, "Video removed: %p, %p\n", | ||
675 | icd->parent, icd->vdev); | ||
676 | if (icl->free_bus) | ||
677 | icl->free_bus(icl); | ||
678 | } | ||
679 | |||
680 | static int mt9m001_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines) | ||
681 | { | ||
682 | struct i2c_client *client = v4l2_get_subdevdata(sd); | ||
683 | struct mt9m001 *mt9m001 = to_mt9m001(client); | ||
684 | |||
685 | *lines = mt9m001->y_skip_top; | ||
686 | |||
687 | return 0; | ||
688 | } | ||
689 | |||
690 | static struct v4l2_subdev_core_ops mt9m001_subdev_core_ops = { | ||
691 | .g_ctrl = mt9m001_g_ctrl, | ||
692 | .s_ctrl = mt9m001_s_ctrl, | ||
693 | .g_chip_ident = mt9m001_g_chip_ident, | ||
694 | #ifdef CONFIG_VIDEO_ADV_DEBUG | ||
695 | .g_register = mt9m001_g_register, | ||
696 | .s_register = mt9m001_s_register, | ||
697 | #endif | ||
698 | }; | ||
699 | |||
700 | static int mt9m001_enum_fmt(struct v4l2_subdev *sd, unsigned int index, | ||
701 | enum v4l2_mbus_pixelcode *code) | ||
702 | { | ||
703 | struct i2c_client *client = v4l2_get_subdevdata(sd); | ||
704 | struct mt9m001 *mt9m001 = to_mt9m001(client); | ||
705 | |||
706 | if (index >= mt9m001->num_fmts) | ||
707 | return -EINVAL; | ||
708 | |||
709 | *code = mt9m001->fmts[index].code; | ||
710 | return 0; | ||
711 | } | ||
712 | |||
713 | static struct v4l2_subdev_video_ops mt9m001_subdev_video_ops = { | ||
714 | .s_stream = mt9m001_s_stream, | ||
715 | .s_mbus_fmt = mt9m001_s_fmt, | ||
716 | .g_mbus_fmt = mt9m001_g_fmt, | ||
717 | .try_mbus_fmt = mt9m001_try_fmt, | ||
718 | .s_crop = mt9m001_s_crop, | ||
719 | .g_crop = mt9m001_g_crop, | ||
720 | .cropcap = mt9m001_cropcap, | ||
721 | .enum_mbus_fmt = mt9m001_enum_fmt, | ||
722 | }; | ||
723 | |||
724 | static struct v4l2_subdev_sensor_ops mt9m001_subdev_sensor_ops = { | ||
725 | .g_skip_top_lines = mt9m001_g_skip_top_lines, | ||
726 | }; | ||
727 | |||
728 | static struct v4l2_subdev_ops mt9m001_subdev_ops = { | ||
729 | .core = &mt9m001_subdev_core_ops, | ||
730 | .video = &mt9m001_subdev_video_ops, | ||
731 | .sensor = &mt9m001_subdev_sensor_ops, | ||
732 | }; | ||
733 | |||
734 | static int mt9m001_probe(struct i2c_client *client, | ||
735 | const struct i2c_device_id *did) | ||
736 | { | ||
737 | struct mt9m001 *mt9m001; | ||
738 | struct soc_camera_device *icd = client->dev.platform_data; | ||
739 | struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); | ||
740 | struct soc_camera_link *icl; | ||
741 | int ret; | ||
742 | |||
743 | if (!icd) { | ||
744 | dev_err(&client->dev, "MT9M001: missing soc-camera data!\n"); | ||
745 | return -EINVAL; | ||
746 | } | ||
747 | |||
748 | icl = to_soc_camera_link(icd); | ||
749 | if (!icl) { | ||
750 | dev_err(&client->dev, "MT9M001 driver needs platform data\n"); | ||
751 | return -EINVAL; | ||
752 | } | ||
753 | |||
754 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) { | ||
755 | dev_warn(&adapter->dev, | ||
756 | "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n"); | ||
757 | return -EIO; | ||
758 | } | ||
759 | |||
760 | mt9m001 = kzalloc(sizeof(struct mt9m001), GFP_KERNEL); | ||
761 | if (!mt9m001) | ||
762 | return -ENOMEM; | ||
763 | |||
764 | v4l2_i2c_subdev_init(&mt9m001->subdev, client, &mt9m001_subdev_ops); | ||
765 | |||
766 | /* Second stage probe - when a capture adapter is there */ | ||
767 | icd->ops = &mt9m001_ops; | ||
768 | |||
769 | mt9m001->y_skip_top = 0; | ||
770 | mt9m001->rect.left = MT9M001_COLUMN_SKIP; | ||
771 | mt9m001->rect.top = MT9M001_ROW_SKIP; | ||
772 | mt9m001->rect.width = MT9M001_MAX_WIDTH; | ||
773 | mt9m001->rect.height = MT9M001_MAX_HEIGHT; | ||
774 | |||
775 | /* | ||
776 | * Simulated autoexposure. If enabled, we calculate shutter width | ||
777 | * ourselves in the driver based on vertical blanking and frame width | ||
778 | */ | ||
779 | mt9m001->autoexposure = 1; | ||
780 | |||
781 | ret = mt9m001_video_probe(icd, client); | ||
782 | if (ret) { | ||
783 | icd->ops = NULL; | ||
784 | kfree(mt9m001); | ||
785 | } | ||
786 | |||
787 | return ret; | ||
788 | } | ||
789 | |||
790 | static int mt9m001_remove(struct i2c_client *client) | ||
791 | { | ||
792 | struct mt9m001 *mt9m001 = to_mt9m001(client); | ||
793 | struct soc_camera_device *icd = client->dev.platform_data; | ||
794 | |||
795 | icd->ops = NULL; | ||
796 | mt9m001_video_remove(icd); | ||
797 | kfree(mt9m001); | ||
798 | |||
799 | return 0; | ||
800 | } | ||
801 | |||
802 | static const struct i2c_device_id mt9m001_id[] = { | ||
803 | { "mt9m001", 0 }, | ||
804 | { } | ||
805 | }; | ||
806 | MODULE_DEVICE_TABLE(i2c, mt9m001_id); | ||
807 | |||
808 | static struct i2c_driver mt9m001_i2c_driver = { | ||
809 | .driver = { | ||
810 | .name = "mt9m001", | ||
811 | }, | ||
812 | .probe = mt9m001_probe, | ||
813 | .remove = mt9m001_remove, | ||
814 | .id_table = mt9m001_id, | ||
815 | }; | ||
816 | |||
817 | static int __init mt9m001_mod_init(void) | ||
818 | { | ||
819 | return i2c_add_driver(&mt9m001_i2c_driver); | ||
820 | } | ||
821 | |||
822 | static void __exit mt9m001_mod_exit(void) | ||
823 | { | ||
824 | i2c_del_driver(&mt9m001_i2c_driver); | ||
825 | } | ||
826 | |||
827 | module_init(mt9m001_mod_init); | ||
828 | module_exit(mt9m001_mod_exit); | ||
829 | |||
830 | MODULE_DESCRIPTION("Micron MT9M001 Camera driver"); | ||
831 | MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>"); | ||
832 | MODULE_LICENSE("GPL"); | ||