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251cb88e MH |
1 | /* |
2 | * Driver for MT9M032 CMOS Image Sensor from Micron | |
3 | * | |
4 | * Copyright (C) 2010-2011 Lund Engineering | |
5 | * Contact: Gil Lund <gwlund@lundeng.com> | |
6 | * Author: Martin Hostettler <martin@neutronstar.dyndns.org> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * version 2 as published by the Free Software Foundation. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
20 | * 02110-1301 USA | |
21 | */ | |
22 | ||
23 | #include <linux/delay.h> | |
24 | #include <linux/i2c.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/kernel.h> | |
27 | #include <linux/math64.h> | |
28 | #include <linux/module.h> | |
29 | #include <linux/mutex.h> | |
30 | #include <linux/slab.h> | |
31 | #include <linux/v4l2-mediabus.h> | |
32 | ||
33 | #include <media/media-entity.h> | |
b5dcee22 | 34 | #include <media/i2c/mt9m032.h> |
251cb88e MH |
35 | #include <media/v4l2-ctrls.h> |
36 | #include <media/v4l2-device.h> | |
37 | #include <media/v4l2-subdev.h> | |
38 | ||
39 | #include "aptina-pll.h" | |
40 | ||
41 | /* | |
42 | * width and height include active boundary and black parts | |
43 | * | |
44 | * column 0- 15 active boundary | |
45 | * column 16-1455 image | |
46 | * column 1456-1471 active boundary | |
47 | * column 1472-1599 black | |
48 | * | |
49 | * row 0- 51 black | |
50 | * row 53- 59 active boundary | |
51 | * row 60-1139 image | |
52 | * row 1140-1147 active boundary | |
53 | * row 1148-1151 black | |
54 | */ | |
55 | ||
56 | #define MT9M032_PIXEL_ARRAY_WIDTH 1600 | |
57 | #define MT9M032_PIXEL_ARRAY_HEIGHT 1152 | |
58 | ||
59 | #define MT9M032_CHIP_VERSION 0x00 | |
60 | #define MT9M032_CHIP_VERSION_VALUE 0x1402 | |
61 | #define MT9M032_ROW_START 0x01 | |
62 | #define MT9M032_ROW_START_MIN 0 | |
63 | #define MT9M032_ROW_START_MAX 1152 | |
64 | #define MT9M032_ROW_START_DEF 60 | |
65 | #define MT9M032_COLUMN_START 0x02 | |
66 | #define MT9M032_COLUMN_START_MIN 0 | |
67 | #define MT9M032_COLUMN_START_MAX 1600 | |
68 | #define MT9M032_COLUMN_START_DEF 16 | |
69 | #define MT9M032_ROW_SIZE 0x03 | |
70 | #define MT9M032_ROW_SIZE_MIN 32 | |
71 | #define MT9M032_ROW_SIZE_MAX 1152 | |
72 | #define MT9M032_ROW_SIZE_DEF 1080 | |
73 | #define MT9M032_COLUMN_SIZE 0x04 | |
74 | #define MT9M032_COLUMN_SIZE_MIN 32 | |
75 | #define MT9M032_COLUMN_SIZE_MAX 1600 | |
76 | #define MT9M032_COLUMN_SIZE_DEF 1440 | |
77 | #define MT9M032_HBLANK 0x05 | |
78 | #define MT9M032_VBLANK 0x06 | |
79 | #define MT9M032_VBLANK_MAX 0x7ff | |
80 | #define MT9M032_SHUTTER_WIDTH_HIGH 0x08 | |
81 | #define MT9M032_SHUTTER_WIDTH_LOW 0x09 | |
82 | #define MT9M032_SHUTTER_WIDTH_MIN 1 | |
83 | #define MT9M032_SHUTTER_WIDTH_MAX 1048575 | |
84 | #define MT9M032_SHUTTER_WIDTH_DEF 1943 | |
85 | #define MT9M032_PIX_CLK_CTRL 0x0a | |
86 | #define MT9M032_PIX_CLK_CTRL_INV_PIXCLK 0x8000 | |
87 | #define MT9M032_RESTART 0x0b | |
88 | #define MT9M032_RESET 0x0d | |
89 | #define MT9M032_PLL_CONFIG1 0x11 | |
a54b80b1 | 90 | #define MT9M032_PLL_CONFIG1_PREDIV_MASK 0x3f |
251cb88e MH |
91 | #define MT9M032_PLL_CONFIG1_MUL_SHIFT 8 |
92 | #define MT9M032_READ_MODE1 0x1e | |
73254c30 LP |
93 | #define MT9M032_READ_MODE1_OUTPUT_BAD_FRAMES (1 << 13) |
94 | #define MT9M032_READ_MODE1_MAINTAIN_FRAME_RATE (1 << 12) | |
95 | #define MT9M032_READ_MODE1_XOR_LINE_VALID (1 << 11) | |
96 | #define MT9M032_READ_MODE1_CONT_LINE_VALID (1 << 10) | |
97 | #define MT9M032_READ_MODE1_INVERT_TRIGGER (1 << 9) | |
98 | #define MT9M032_READ_MODE1_SNAPSHOT (1 << 8) | |
99 | #define MT9M032_READ_MODE1_GLOBAL_RESET (1 << 7) | |
100 | #define MT9M032_READ_MODE1_BULB_EXPOSURE (1 << 6) | |
101 | #define MT9M032_READ_MODE1_INVERT_STROBE (1 << 5) | |
102 | #define MT9M032_READ_MODE1_STROBE_ENABLE (1 << 4) | |
103 | #define MT9M032_READ_MODE1_STROBE_START_TRIG1 (0 << 2) | |
104 | #define MT9M032_READ_MODE1_STROBE_START_EXP (1 << 2) | |
105 | #define MT9M032_READ_MODE1_STROBE_START_SHUTTER (2 << 2) | |
106 | #define MT9M032_READ_MODE1_STROBE_START_TRIG2 (3 << 2) | |
107 | #define MT9M032_READ_MODE1_STROBE_END_TRIG1 (0 << 0) | |
108 | #define MT9M032_READ_MODE1_STROBE_END_EXP (1 << 0) | |
109 | #define MT9M032_READ_MODE1_STROBE_END_SHUTTER (2 << 0) | |
110 | #define MT9M032_READ_MODE1_STROBE_END_TRIG2 (3 << 0) | |
251cb88e MH |
111 | #define MT9M032_READ_MODE2 0x20 |
112 | #define MT9M032_READ_MODE2_VFLIP_SHIFT 15 | |
113 | #define MT9M032_READ_MODE2_HFLIP_SHIFT 14 | |
114 | #define MT9M032_READ_MODE2_ROW_BLC 0x40 | |
115 | #define MT9M032_GAIN_GREEN1 0x2b | |
116 | #define MT9M032_GAIN_BLUE 0x2c | |
117 | #define MT9M032_GAIN_RED 0x2d | |
118 | #define MT9M032_GAIN_GREEN2 0x2e | |
119 | ||
120 | /* write only */ | |
121 | #define MT9M032_GAIN_ALL 0x35 | |
122 | #define MT9M032_GAIN_DIGITAL_MASK 0x7f | |
123 | #define MT9M032_GAIN_DIGITAL_SHIFT 8 | |
124 | #define MT9M032_GAIN_AMUL_SHIFT 6 | |
125 | #define MT9M032_GAIN_ANALOG_MASK 0x3f | |
126 | #define MT9M032_FORMATTER1 0x9e | |
a54b80b1 LP |
127 | #define MT9M032_FORMATTER1_PLL_P1_6 (1 << 8) |
128 | #define MT9M032_FORMATTER1_PARALLEL (1 << 12) | |
251cb88e MH |
129 | #define MT9M032_FORMATTER2 0x9f |
130 | #define MT9M032_FORMATTER2_DOUT_EN 0x1000 | |
131 | #define MT9M032_FORMATTER2_PIXCLK_EN 0x2000 | |
132 | ||
133 | /* | |
134 | * The available MT9M032 datasheet is missing documentation for register 0x10 | |
135 | * MT9P031 seems to be close enough, so use constants from that datasheet for | |
136 | * now. | |
137 | * But keep the name MT9P031 to remind us, that this isn't really confirmed | |
138 | * for this sensor. | |
139 | */ | |
140 | #define MT9P031_PLL_CONTROL 0x10 | |
141 | #define MT9P031_PLL_CONTROL_PWROFF 0x0050 | |
142 | #define MT9P031_PLL_CONTROL_PWRON 0x0051 | |
143 | #define MT9P031_PLL_CONTROL_USEPLL 0x0052 | |
251cb88e MH |
144 | |
145 | struct mt9m032 { | |
146 | struct v4l2_subdev subdev; | |
147 | struct media_pad pad; | |
148 | struct mt9m032_platform_data *pdata; | |
149 | ||
150 | unsigned int pix_clock; | |
151 | ||
152 | struct v4l2_ctrl_handler ctrls; | |
153 | struct { | |
154 | struct v4l2_ctrl *hflip; | |
155 | struct v4l2_ctrl *vflip; | |
156 | }; | |
157 | ||
158 | struct mutex lock; /* Protects streaming, format, interval and crop */ | |
159 | ||
160 | bool streaming; | |
161 | ||
162 | struct v4l2_mbus_framefmt format; | |
163 | struct v4l2_rect crop; | |
164 | struct v4l2_fract frame_interval; | |
165 | }; | |
166 | ||
167 | #define to_mt9m032(sd) container_of(sd, struct mt9m032, subdev) | |
168 | #define to_dev(sensor) \ | |
169 | (&((struct i2c_client *)v4l2_get_subdevdata(&(sensor)->subdev))->dev) | |
170 | ||
171 | static int mt9m032_read(struct i2c_client *client, u8 reg) | |
172 | { | |
173 | return i2c_smbus_read_word_swapped(client, reg); | |
174 | } | |
175 | ||
176 | static int mt9m032_write(struct i2c_client *client, u8 reg, const u16 data) | |
177 | { | |
178 | return i2c_smbus_write_word_swapped(client, reg, data); | |
179 | } | |
180 | ||
181 | static u32 mt9m032_row_time(struct mt9m032 *sensor, unsigned int width) | |
182 | { | |
183 | unsigned int effective_width; | |
184 | u32 ns; | |
185 | ||
186 | effective_width = width + 716; /* empirical value */ | |
187 | ns = div_u64(1000000000ULL * effective_width, sensor->pix_clock); | |
188 | dev_dbg(to_dev(sensor), "MT9M032 line time: %u ns\n", ns); | |
189 | return ns; | |
190 | } | |
191 | ||
192 | static int mt9m032_update_timing(struct mt9m032 *sensor, | |
193 | struct v4l2_fract *interval) | |
194 | { | |
195 | struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); | |
196 | struct v4l2_rect *crop = &sensor->crop; | |
197 | unsigned int min_vblank; | |
198 | unsigned int vblank; | |
199 | u32 row_time; | |
200 | ||
201 | if (!interval) | |
202 | interval = &sensor->frame_interval; | |
203 | ||
204 | row_time = mt9m032_row_time(sensor, crop->width); | |
205 | ||
206 | vblank = div_u64(1000000000ULL * interval->numerator, | |
207 | (u64)row_time * interval->denominator) | |
208 | - crop->height; | |
209 | ||
210 | if (vblank > MT9M032_VBLANK_MAX) { | |
211 | /* hardware limits to 11 bit values */ | |
212 | interval->denominator = 1000; | |
213 | interval->numerator = | |
214 | div_u64((crop->height + MT9M032_VBLANK_MAX) * | |
215 | (u64)row_time * interval->denominator, | |
216 | 1000000000ULL); | |
217 | vblank = div_u64(1000000000ULL * interval->numerator, | |
218 | (u64)row_time * interval->denominator) | |
219 | - crop->height; | |
220 | } | |
221 | /* enforce minimal 1.6ms blanking time. */ | |
222 | min_vblank = 1600000 / row_time; | |
223 | vblank = clamp_t(unsigned int, vblank, min_vblank, MT9M032_VBLANK_MAX); | |
224 | ||
225 | return mt9m032_write(client, MT9M032_VBLANK, vblank); | |
226 | } | |
227 | ||
228 | static int mt9m032_update_geom_timing(struct mt9m032 *sensor) | |
229 | { | |
230 | struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); | |
231 | int ret; | |
232 | ||
233 | ret = mt9m032_write(client, MT9M032_COLUMN_SIZE, | |
234 | sensor->crop.width - 1); | |
235 | if (!ret) | |
236 | ret = mt9m032_write(client, MT9M032_ROW_SIZE, | |
237 | sensor->crop.height - 1); | |
238 | if (!ret) | |
239 | ret = mt9m032_write(client, MT9M032_COLUMN_START, | |
240 | sensor->crop.left); | |
241 | if (!ret) | |
242 | ret = mt9m032_write(client, MT9M032_ROW_START, | |
243 | sensor->crop.top); | |
244 | if (!ret) | |
245 | ret = mt9m032_update_timing(sensor, NULL); | |
246 | return ret; | |
247 | } | |
248 | ||
249 | static int update_formatter2(struct mt9m032 *sensor, bool streaming) | |
250 | { | |
251 | struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); | |
252 | u16 reg_val = MT9M032_FORMATTER2_DOUT_EN | |
253 | | 0x0070; /* parts reserved! */ | |
254 | /* possibly for changing to 14-bit mode */ | |
255 | ||
256 | if (streaming) | |
257 | reg_val |= MT9M032_FORMATTER2_PIXCLK_EN; /* pixclock enable */ | |
258 | ||
259 | return mt9m032_write(client, MT9M032_FORMATTER2, reg_val); | |
260 | } | |
261 | ||
262 | static int mt9m032_setup_pll(struct mt9m032 *sensor) | |
263 | { | |
264 | static const struct aptina_pll_limits limits = { | |
265 | .ext_clock_min = 8000000, | |
266 | .ext_clock_max = 16500000, | |
267 | .int_clock_min = 2000000, | |
268 | .int_clock_max = 24000000, | |
269 | .out_clock_min = 322000000, | |
270 | .out_clock_max = 693000000, | |
271 | .pix_clock_max = 99000000, | |
272 | .n_min = 1, | |
273 | .n_max = 64, | |
274 | .m_min = 16, | |
275 | .m_max = 255, | |
a54b80b1 LP |
276 | .p1_min = 6, |
277 | .p1_max = 7, | |
251cb88e MH |
278 | }; |
279 | ||
280 | struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); | |
281 | struct mt9m032_platform_data *pdata = sensor->pdata; | |
282 | struct aptina_pll pll; | |
a54b80b1 | 283 | u16 reg_val; |
251cb88e MH |
284 | int ret; |
285 | ||
286 | pll.ext_clock = pdata->ext_clock; | |
287 | pll.pix_clock = pdata->pix_clock; | |
288 | ||
289 | ret = aptina_pll_calculate(&client->dev, &limits, &pll); | |
290 | if (ret < 0) | |
291 | return ret; | |
292 | ||
293 | sensor->pix_clock = pdata->pix_clock; | |
294 | ||
295 | ret = mt9m032_write(client, MT9M032_PLL_CONFIG1, | |
a54b80b1 LP |
296 | (pll.m << MT9M032_PLL_CONFIG1_MUL_SHIFT) | |
297 | ((pll.n - 1) & MT9M032_PLL_CONFIG1_PREDIV_MASK)); | |
251cb88e MH |
298 | if (!ret) |
299 | ret = mt9m032_write(client, MT9P031_PLL_CONTROL, | |
300 | MT9P031_PLL_CONTROL_PWRON | | |
301 | MT9P031_PLL_CONTROL_USEPLL); | |
302 | if (!ret) /* more reserved, Continuous, Master Mode */ | |
73254c30 LP |
303 | ret = mt9m032_write(client, MT9M032_READ_MODE1, 0x8000 | |
304 | MT9M032_READ_MODE1_STROBE_START_EXP | | |
305 | MT9M032_READ_MODE1_STROBE_END_SHUTTER); | |
a54b80b1 LP |
306 | if (!ret) { |
307 | reg_val = (pll.p1 == 6 ? MT9M032_FORMATTER1_PLL_P1_6 : 0) | |
308 | | MT9M032_FORMATTER1_PARALLEL | 0x001e; /* 14-bit */ | |
309 | ret = mt9m032_write(client, MT9M032_FORMATTER1, reg_val); | |
310 | } | |
251cb88e MH |
311 | |
312 | return ret; | |
313 | } | |
314 | ||
315 | /* ----------------------------------------------------------------------------- | |
316 | * Subdev pad operations | |
317 | */ | |
318 | ||
319 | static int mt9m032_enum_mbus_code(struct v4l2_subdev *subdev, | |
f7234138 | 320 | struct v4l2_subdev_pad_config *cfg, |
251cb88e MH |
321 | struct v4l2_subdev_mbus_code_enum *code) |
322 | { | |
323 | if (code->index != 0) | |
324 | return -EINVAL; | |
325 | ||
f5fe58fd | 326 | code->code = MEDIA_BUS_FMT_Y8_1X8; |
251cb88e MH |
327 | return 0; |
328 | } | |
329 | ||
330 | static int mt9m032_enum_frame_size(struct v4l2_subdev *subdev, | |
f7234138 | 331 | struct v4l2_subdev_pad_config *cfg, |
251cb88e MH |
332 | struct v4l2_subdev_frame_size_enum *fse) |
333 | { | |
f5fe58fd | 334 | if (fse->index != 0 || fse->code != MEDIA_BUS_FMT_Y8_1X8) |
251cb88e MH |
335 | return -EINVAL; |
336 | ||
337 | fse->min_width = MT9M032_COLUMN_SIZE_DEF; | |
338 | fse->max_width = MT9M032_COLUMN_SIZE_DEF; | |
339 | fse->min_height = MT9M032_ROW_SIZE_DEF; | |
340 | fse->max_height = MT9M032_ROW_SIZE_DEF; | |
341 | ||
342 | return 0; | |
343 | } | |
344 | ||
345 | /** | |
346 | * __mt9m032_get_pad_crop() - get crop rect | |
347 | * @sensor: pointer to the sensor struct | |
f7234138 | 348 | * @cfg: v4l2_subdev_pad_config for getting the try crop rect from |
251cb88e MH |
349 | * @which: select try or active crop rect |
350 | * | |
351 | * Returns a pointer the current active or fh relative try crop rect | |
352 | */ | |
353 | static struct v4l2_rect * | |
f7234138 | 354 | __mt9m032_get_pad_crop(struct mt9m032 *sensor, struct v4l2_subdev_pad_config *cfg, |
251cb88e MH |
355 | enum v4l2_subdev_format_whence which) |
356 | { | |
357 | switch (which) { | |
358 | case V4L2_SUBDEV_FORMAT_TRY: | |
f7234138 | 359 | return v4l2_subdev_get_try_crop(&sensor->subdev, cfg, 0); |
251cb88e MH |
360 | case V4L2_SUBDEV_FORMAT_ACTIVE: |
361 | return &sensor->crop; | |
362 | default: | |
363 | return NULL; | |
364 | } | |
365 | } | |
366 | ||
367 | /** | |
368 | * __mt9m032_get_pad_format() - get format | |
369 | * @sensor: pointer to the sensor struct | |
f7234138 | 370 | * @cfg: v4l2_subdev_pad_config for getting the try format from |
251cb88e MH |
371 | * @which: select try or active format |
372 | * | |
373 | * Returns a pointer the current active or fh relative try format | |
374 | */ | |
375 | static struct v4l2_mbus_framefmt * | |
f7234138 | 376 | __mt9m032_get_pad_format(struct mt9m032 *sensor, struct v4l2_subdev_pad_config *cfg, |
251cb88e MH |
377 | enum v4l2_subdev_format_whence which) |
378 | { | |
379 | switch (which) { | |
380 | case V4L2_SUBDEV_FORMAT_TRY: | |
f7234138 | 381 | return v4l2_subdev_get_try_format(&sensor->subdev, cfg, 0); |
251cb88e MH |
382 | case V4L2_SUBDEV_FORMAT_ACTIVE: |
383 | return &sensor->format; | |
384 | default: | |
385 | return NULL; | |
386 | } | |
387 | } | |
388 | ||
389 | static int mt9m032_get_pad_format(struct v4l2_subdev *subdev, | |
f7234138 | 390 | struct v4l2_subdev_pad_config *cfg, |
251cb88e MH |
391 | struct v4l2_subdev_format *fmt) |
392 | { | |
393 | struct mt9m032 *sensor = to_mt9m032(subdev); | |
394 | ||
395 | mutex_lock(&sensor->lock); | |
f7234138 | 396 | fmt->format = *__mt9m032_get_pad_format(sensor, cfg, fmt->which); |
251cb88e MH |
397 | mutex_unlock(&sensor->lock); |
398 | ||
399 | return 0; | |
400 | } | |
401 | ||
402 | static int mt9m032_set_pad_format(struct v4l2_subdev *subdev, | |
f7234138 | 403 | struct v4l2_subdev_pad_config *cfg, |
251cb88e MH |
404 | struct v4l2_subdev_format *fmt) |
405 | { | |
406 | struct mt9m032 *sensor = to_mt9m032(subdev); | |
407 | int ret; | |
408 | ||
409 | mutex_lock(&sensor->lock); | |
410 | ||
411 | if (sensor->streaming && fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) { | |
412 | ret = -EBUSY; | |
413 | goto done; | |
414 | } | |
415 | ||
416 | /* Scaling is not supported, the format is thus fixed. */ | |
f7234138 | 417 | fmt->format = *__mt9m032_get_pad_format(sensor, cfg, fmt->which); |
b1e1179c | 418 | ret = 0; |
251cb88e MH |
419 | |
420 | done: | |
b1e1179c | 421 | mutex_unlock(&sensor->lock); |
251cb88e MH |
422 | return ret; |
423 | } | |
424 | ||
1a023feb | 425 | static int mt9m032_get_pad_selection(struct v4l2_subdev *subdev, |
f7234138 | 426 | struct v4l2_subdev_pad_config *cfg, |
1a023feb | 427 | struct v4l2_subdev_selection *sel) |
251cb88e MH |
428 | { |
429 | struct mt9m032 *sensor = to_mt9m032(subdev); | |
430 | ||
1a023feb HV |
431 | if (sel->target != V4L2_SEL_TGT_CROP) |
432 | return -EINVAL; | |
433 | ||
251cb88e | 434 | mutex_lock(&sensor->lock); |
f7234138 | 435 | sel->r = *__mt9m032_get_pad_crop(sensor, cfg, sel->which); |
251cb88e MH |
436 | mutex_unlock(&sensor->lock); |
437 | ||
438 | return 0; | |
439 | } | |
440 | ||
1a023feb | 441 | static int mt9m032_set_pad_selection(struct v4l2_subdev *subdev, |
f7234138 | 442 | struct v4l2_subdev_pad_config *cfg, |
1a023feb | 443 | struct v4l2_subdev_selection *sel) |
251cb88e MH |
444 | { |
445 | struct mt9m032 *sensor = to_mt9m032(subdev); | |
446 | struct v4l2_mbus_framefmt *format; | |
447 | struct v4l2_rect *__crop; | |
448 | struct v4l2_rect rect; | |
449 | int ret = 0; | |
450 | ||
1a023feb HV |
451 | if (sel->target != V4L2_SEL_TGT_CROP) |
452 | return -EINVAL; | |
453 | ||
251cb88e MH |
454 | mutex_lock(&sensor->lock); |
455 | ||
1a023feb | 456 | if (sensor->streaming && sel->which == V4L2_SUBDEV_FORMAT_ACTIVE) { |
251cb88e MH |
457 | ret = -EBUSY; |
458 | goto done; | |
459 | } | |
460 | ||
461 | /* Clamp the crop rectangle boundaries and align them to a multiple of 2 | |
462 | * pixels to ensure a GRBG Bayer pattern. | |
463 | */ | |
1a023feb | 464 | rect.left = clamp(ALIGN(sel->r.left, 2), MT9M032_COLUMN_START_MIN, |
251cb88e | 465 | MT9M032_COLUMN_START_MAX); |
1a023feb | 466 | rect.top = clamp(ALIGN(sel->r.top, 2), MT9M032_ROW_START_MIN, |
251cb88e | 467 | MT9M032_ROW_START_MAX); |
1a023feb | 468 | rect.width = clamp_t(unsigned int, ALIGN(sel->r.width, 2), |
f90580ca | 469 | MT9M032_COLUMN_SIZE_MIN, MT9M032_COLUMN_SIZE_MAX); |
1a023feb | 470 | rect.height = clamp_t(unsigned int, ALIGN(sel->r.height, 2), |
f90580ca RRD |
471 | MT9M032_ROW_SIZE_MIN, MT9M032_ROW_SIZE_MAX); |
472 | ||
473 | rect.width = min_t(unsigned int, rect.width, | |
474 | MT9M032_PIXEL_ARRAY_WIDTH - rect.left); | |
475 | rect.height = min_t(unsigned int, rect.height, | |
476 | MT9M032_PIXEL_ARRAY_HEIGHT - rect.top); | |
251cb88e | 477 | |
f7234138 | 478 | __crop = __mt9m032_get_pad_crop(sensor, cfg, sel->which); |
251cb88e MH |
479 | |
480 | if (rect.width != __crop->width || rect.height != __crop->height) { | |
481 | /* Reset the output image size if the crop rectangle size has | |
482 | * been modified. | |
483 | */ | |
f7234138 | 484 | format = __mt9m032_get_pad_format(sensor, cfg, sel->which); |
251cb88e MH |
485 | format->width = rect.width; |
486 | format->height = rect.height; | |
487 | } | |
488 | ||
489 | *__crop = rect; | |
1a023feb | 490 | sel->r = rect; |
251cb88e | 491 | |
1a023feb | 492 | if (sel->which == V4L2_SUBDEV_FORMAT_ACTIVE) |
251cb88e MH |
493 | ret = mt9m032_update_geom_timing(sensor); |
494 | ||
495 | done: | |
496 | mutex_unlock(&sensor->lock); | |
497 | return ret; | |
498 | } | |
499 | ||
500 | static int mt9m032_get_frame_interval(struct v4l2_subdev *subdev, | |
501 | struct v4l2_subdev_frame_interval *fi) | |
502 | { | |
503 | struct mt9m032 *sensor = to_mt9m032(subdev); | |
504 | ||
505 | mutex_lock(&sensor->lock); | |
506 | memset(fi, 0, sizeof(*fi)); | |
507 | fi->interval = sensor->frame_interval; | |
508 | mutex_unlock(&sensor->lock); | |
509 | ||
510 | return 0; | |
511 | } | |
512 | ||
513 | static int mt9m032_set_frame_interval(struct v4l2_subdev *subdev, | |
514 | struct v4l2_subdev_frame_interval *fi) | |
515 | { | |
516 | struct mt9m032 *sensor = to_mt9m032(subdev); | |
517 | int ret; | |
518 | ||
519 | mutex_lock(&sensor->lock); | |
520 | ||
521 | if (sensor->streaming) { | |
522 | ret = -EBUSY; | |
523 | goto done; | |
524 | } | |
525 | ||
526 | /* Avoid divisions by 0. */ | |
527 | if (fi->interval.denominator == 0) | |
528 | fi->interval.denominator = 1; | |
529 | ||
530 | ret = mt9m032_update_timing(sensor, &fi->interval); | |
531 | if (!ret) | |
532 | sensor->frame_interval = fi->interval; | |
533 | ||
534 | done: | |
535 | mutex_unlock(&sensor->lock); | |
536 | return ret; | |
537 | } | |
538 | ||
539 | static int mt9m032_s_stream(struct v4l2_subdev *subdev, int streaming) | |
540 | { | |
541 | struct mt9m032 *sensor = to_mt9m032(subdev); | |
542 | int ret; | |
543 | ||
544 | mutex_lock(&sensor->lock); | |
545 | ret = update_formatter2(sensor, streaming); | |
546 | if (!ret) | |
547 | sensor->streaming = streaming; | |
548 | mutex_unlock(&sensor->lock); | |
549 | ||
550 | return ret; | |
551 | } | |
552 | ||
553 | /* ----------------------------------------------------------------------------- | |
554 | * V4L2 subdev core operations | |
555 | */ | |
556 | ||
557 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
558 | static int mt9m032_g_register(struct v4l2_subdev *sd, | |
559 | struct v4l2_dbg_register *reg) | |
560 | { | |
561 | struct mt9m032 *sensor = to_mt9m032(sd); | |
562 | struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); | |
563 | int val; | |
564 | ||
e1277110 | 565 | if (reg->reg > 0xff) |
251cb88e | 566 | return -EINVAL; |
251cb88e MH |
567 | |
568 | val = mt9m032_read(client, reg->reg); | |
569 | if (val < 0) | |
570 | return -EIO; | |
571 | ||
572 | reg->size = 2; | |
573 | reg->val = val; | |
574 | ||
575 | return 0; | |
576 | } | |
577 | ||
578 | static int mt9m032_s_register(struct v4l2_subdev *sd, | |
977ba3b1 | 579 | const struct v4l2_dbg_register *reg) |
251cb88e MH |
580 | { |
581 | struct mt9m032 *sensor = to_mt9m032(sd); | |
582 | struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); | |
583 | ||
e1277110 | 584 | if (reg->reg > 0xff) |
251cb88e MH |
585 | return -EINVAL; |
586 | ||
251cb88e MH |
587 | return mt9m032_write(client, reg->reg, reg->val); |
588 | } | |
589 | #endif | |
590 | ||
591 | /* ----------------------------------------------------------------------------- | |
592 | * V4L2 subdev control operations | |
593 | */ | |
594 | ||
595 | static int update_read_mode2(struct mt9m032 *sensor, bool vflip, bool hflip) | |
596 | { | |
597 | struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); | |
598 | int reg_val = (vflip << MT9M032_READ_MODE2_VFLIP_SHIFT) | |
599 | | (hflip << MT9M032_READ_MODE2_HFLIP_SHIFT) | |
600 | | MT9M032_READ_MODE2_ROW_BLC | |
601 | | 0x0007; | |
602 | ||
603 | return mt9m032_write(client, MT9M032_READ_MODE2, reg_val); | |
604 | } | |
605 | ||
606 | static int mt9m032_set_gain(struct mt9m032 *sensor, s32 val) | |
607 | { | |
608 | struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); | |
609 | int digital_gain_val; /* in 1/8th (0..127) */ | |
610 | int analog_mul; /* 0 or 1 */ | |
611 | int analog_gain_val; /* in 1/16th. (0..63) */ | |
612 | u16 reg_val; | |
613 | ||
614 | digital_gain_val = 51; /* from setup example */ | |
615 | ||
616 | if (val < 63) { | |
617 | analog_mul = 0; | |
618 | analog_gain_val = val; | |
619 | } else { | |
620 | analog_mul = 1; | |
621 | analog_gain_val = val / 2; | |
622 | } | |
623 | ||
624 | /* a_gain = (1 + analog_mul) + (analog_gain_val + 1) / 16 */ | |
625 | /* overall_gain = a_gain * (1 + digital_gain_val / 8) */ | |
626 | ||
627 | reg_val = ((digital_gain_val & MT9M032_GAIN_DIGITAL_MASK) | |
628 | << MT9M032_GAIN_DIGITAL_SHIFT) | |
629 | | ((analog_mul & 1) << MT9M032_GAIN_AMUL_SHIFT) | |
630 | | (analog_gain_val & MT9M032_GAIN_ANALOG_MASK); | |
631 | ||
632 | return mt9m032_write(client, MT9M032_GAIN_ALL, reg_val); | |
633 | } | |
634 | ||
635 | static int mt9m032_try_ctrl(struct v4l2_ctrl *ctrl) | |
636 | { | |
637 | if (ctrl->id == V4L2_CID_GAIN && ctrl->val >= 63) { | |
638 | /* round because of multiplier used for values >= 63 */ | |
639 | ctrl->val &= ~1; | |
640 | } | |
641 | ||
642 | return 0; | |
643 | } | |
644 | ||
645 | static int mt9m032_set_ctrl(struct v4l2_ctrl *ctrl) | |
646 | { | |
647 | struct mt9m032 *sensor = | |
648 | container_of(ctrl->handler, struct mt9m032, ctrls); | |
649 | struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); | |
650 | int ret; | |
651 | ||
652 | switch (ctrl->id) { | |
653 | case V4L2_CID_GAIN: | |
654 | return mt9m032_set_gain(sensor, ctrl->val); | |
655 | ||
656 | case V4L2_CID_HFLIP: | |
657 | /* case V4L2_CID_VFLIP: -- In the same cluster */ | |
658 | return update_read_mode2(sensor, sensor->vflip->val, | |
659 | sensor->hflip->val); | |
660 | ||
661 | case V4L2_CID_EXPOSURE: | |
662 | ret = mt9m032_write(client, MT9M032_SHUTTER_WIDTH_HIGH, | |
663 | (ctrl->val >> 16) & 0xffff); | |
664 | if (ret < 0) | |
665 | return ret; | |
666 | ||
667 | return mt9m032_write(client, MT9M032_SHUTTER_WIDTH_LOW, | |
668 | ctrl->val & 0xffff); | |
669 | } | |
670 | ||
671 | return 0; | |
672 | } | |
673 | ||
217bdb07 | 674 | static const struct v4l2_ctrl_ops mt9m032_ctrl_ops = { |
251cb88e MH |
675 | .s_ctrl = mt9m032_set_ctrl, |
676 | .try_ctrl = mt9m032_try_ctrl, | |
677 | }; | |
678 | ||
679 | /* -------------------------------------------------------------------------- */ | |
680 | ||
681 | static const struct v4l2_subdev_core_ops mt9m032_core_ops = { | |
682 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
683 | .g_register = mt9m032_g_register, | |
684 | .s_register = mt9m032_s_register, | |
685 | #endif | |
686 | }; | |
687 | ||
688 | static const struct v4l2_subdev_video_ops mt9m032_video_ops = { | |
689 | .s_stream = mt9m032_s_stream, | |
690 | .g_frame_interval = mt9m032_get_frame_interval, | |
691 | .s_frame_interval = mt9m032_set_frame_interval, | |
692 | }; | |
693 | ||
694 | static const struct v4l2_subdev_pad_ops mt9m032_pad_ops = { | |
695 | .enum_mbus_code = mt9m032_enum_mbus_code, | |
696 | .enum_frame_size = mt9m032_enum_frame_size, | |
697 | .get_fmt = mt9m032_get_pad_format, | |
698 | .set_fmt = mt9m032_set_pad_format, | |
1a023feb HV |
699 | .set_selection = mt9m032_set_pad_selection, |
700 | .get_selection = mt9m032_get_pad_selection, | |
251cb88e MH |
701 | }; |
702 | ||
703 | static const struct v4l2_subdev_ops mt9m032_ops = { | |
704 | .core = &mt9m032_core_ops, | |
705 | .video = &mt9m032_video_ops, | |
706 | .pad = &mt9m032_pad_ops, | |
707 | }; | |
708 | ||
709 | /* ----------------------------------------------------------------------------- | |
710 | * Driver initialization and probing | |
711 | */ | |
712 | ||
713 | static int mt9m032_probe(struct i2c_client *client, | |
714 | const struct i2c_device_id *devid) | |
715 | { | |
5472d3f1 | 716 | struct mt9m032_platform_data *pdata = client->dev.platform_data; |
251cb88e MH |
717 | struct i2c_adapter *adapter = client->adapter; |
718 | struct mt9m032 *sensor; | |
719 | int chip_version; | |
720 | int ret; | |
721 | ||
5472d3f1 LP |
722 | if (pdata == NULL) { |
723 | dev_err(&client->dev, "No platform data\n"); | |
724 | return -EINVAL; | |
725 | } | |
726 | ||
251cb88e MH |
727 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) { |
728 | dev_warn(&client->dev, | |
729 | "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n"); | |
730 | return -EIO; | |
731 | } | |
732 | ||
733 | if (!client->dev.platform_data) | |
734 | return -ENODEV; | |
735 | ||
c02b211d | 736 | sensor = devm_kzalloc(&client->dev, sizeof(*sensor), GFP_KERNEL); |
251cb88e MH |
737 | if (sensor == NULL) |
738 | return -ENOMEM; | |
739 | ||
740 | mutex_init(&sensor->lock); | |
741 | ||
5472d3f1 | 742 | sensor->pdata = pdata; |
251cb88e MH |
743 | |
744 | v4l2_i2c_subdev_init(&sensor->subdev, client, &mt9m032_ops); | |
745 | sensor->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; | |
746 | ||
747 | chip_version = mt9m032_read(client, MT9M032_CHIP_VERSION); | |
748 | if (chip_version != MT9M032_CHIP_VERSION_VALUE) { | |
749 | dev_err(&client->dev, "MT9M032 not detected, wrong version " | |
750 | "0x%04x\n", chip_version); | |
751 | ret = -ENODEV; | |
752 | goto error_sensor; | |
753 | } | |
754 | ||
755 | dev_info(&client->dev, "MT9M032 detected at address 0x%02x\n", | |
756 | client->addr); | |
757 | ||
758 | sensor->frame_interval.numerator = 1; | |
759 | sensor->frame_interval.denominator = 30; | |
760 | ||
761 | sensor->crop.left = MT9M032_COLUMN_START_DEF; | |
762 | sensor->crop.top = MT9M032_ROW_START_DEF; | |
763 | sensor->crop.width = MT9M032_COLUMN_SIZE_DEF; | |
764 | sensor->crop.height = MT9M032_ROW_SIZE_DEF; | |
765 | ||
766 | sensor->format.width = sensor->crop.width; | |
767 | sensor->format.height = sensor->crop.height; | |
f5fe58fd | 768 | sensor->format.code = MEDIA_BUS_FMT_Y8_1X8; |
251cb88e MH |
769 | sensor->format.field = V4L2_FIELD_NONE; |
770 | sensor->format.colorspace = V4L2_COLORSPACE_SRGB; | |
771 | ||
5472d3f1 | 772 | v4l2_ctrl_handler_init(&sensor->ctrls, 5); |
251cb88e MH |
773 | |
774 | v4l2_ctrl_new_std(&sensor->ctrls, &mt9m032_ctrl_ops, | |
775 | V4L2_CID_GAIN, 0, 127, 1, 64); | |
776 | ||
777 | sensor->hflip = v4l2_ctrl_new_std(&sensor->ctrls, | |
778 | &mt9m032_ctrl_ops, | |
779 | V4L2_CID_HFLIP, 0, 1, 1, 0); | |
780 | sensor->vflip = v4l2_ctrl_new_std(&sensor->ctrls, | |
781 | &mt9m032_ctrl_ops, | |
782 | V4L2_CID_VFLIP, 0, 1, 1, 0); | |
783 | ||
784 | v4l2_ctrl_new_std(&sensor->ctrls, &mt9m032_ctrl_ops, | |
785 | V4L2_CID_EXPOSURE, MT9M032_SHUTTER_WIDTH_MIN, | |
786 | MT9M032_SHUTTER_WIDTH_MAX, 1, | |
787 | MT9M032_SHUTTER_WIDTH_DEF); | |
5472d3f1 LP |
788 | v4l2_ctrl_new_std(&sensor->ctrls, &mt9m032_ctrl_ops, |
789 | V4L2_CID_PIXEL_RATE, pdata->pix_clock, | |
790 | pdata->pix_clock, 1, pdata->pix_clock); | |
251cb88e MH |
791 | |
792 | if (sensor->ctrls.error) { | |
793 | ret = sensor->ctrls.error; | |
794 | dev_err(&client->dev, "control initialization error %d\n", ret); | |
795 | goto error_ctrl; | |
796 | } | |
797 | ||
798 | v4l2_ctrl_cluster(2, &sensor->hflip); | |
799 | ||
800 | sensor->subdev.ctrl_handler = &sensor->ctrls; | |
801 | sensor->pad.flags = MEDIA_PAD_FL_SOURCE; | |
ab22e77c | 802 | ret = media_entity_pads_init(&sensor->subdev.entity, 1, &sensor->pad); |
251cb88e MH |
803 | if (ret < 0) |
804 | goto error_ctrl; | |
805 | ||
806 | ret = mt9m032_write(client, MT9M032_RESET, 1); /* reset on */ | |
807 | if (ret < 0) | |
808 | goto error_entity; | |
612cd9e8 | 809 | ret = mt9m032_write(client, MT9M032_RESET, 0); /* reset off */ |
251cb88e MH |
810 | if (ret < 0) |
811 | goto error_entity; | |
812 | ||
813 | ret = mt9m032_setup_pll(sensor); | |
814 | if (ret < 0) | |
815 | goto error_entity; | |
816 | usleep_range(10000, 11000); | |
817 | ||
818 | ret = v4l2_ctrl_handler_setup(&sensor->ctrls); | |
819 | if (ret < 0) | |
820 | goto error_entity; | |
821 | ||
822 | /* SIZE */ | |
823 | ret = mt9m032_update_geom_timing(sensor); | |
824 | if (ret < 0) | |
825 | goto error_entity; | |
826 | ||
827 | ret = mt9m032_write(client, 0x41, 0x0000); /* reserved !!! */ | |
828 | if (ret < 0) | |
829 | goto error_entity; | |
830 | ret = mt9m032_write(client, 0x42, 0x0003); /* reserved !!! */ | |
831 | if (ret < 0) | |
832 | goto error_entity; | |
833 | ret = mt9m032_write(client, 0x43, 0x0003); /* reserved !!! */ | |
834 | if (ret < 0) | |
835 | goto error_entity; | |
836 | ret = mt9m032_write(client, 0x7f, 0x0000); /* reserved !!! */ | |
837 | if (ret < 0) | |
838 | goto error_entity; | |
839 | if (sensor->pdata->invert_pixclock) { | |
840 | ret = mt9m032_write(client, MT9M032_PIX_CLK_CTRL, | |
841 | MT9M032_PIX_CLK_CTRL_INV_PIXCLK); | |
842 | if (ret < 0) | |
843 | goto error_entity; | |
844 | } | |
845 | ||
846 | ret = mt9m032_write(client, MT9M032_RESTART, 1); /* Restart on */ | |
847 | if (ret < 0) | |
848 | goto error_entity; | |
849 | msleep(100); | |
850 | ret = mt9m032_write(client, MT9M032_RESTART, 0); /* Restart off */ | |
851 | if (ret < 0) | |
852 | goto error_entity; | |
853 | msleep(100); | |
854 | ret = update_formatter2(sensor, false); | |
855 | if (ret < 0) | |
856 | goto error_entity; | |
857 | ||
858 | return ret; | |
859 | ||
860 | error_entity: | |
861 | media_entity_cleanup(&sensor->subdev.entity); | |
862 | error_ctrl: | |
863 | v4l2_ctrl_handler_free(&sensor->ctrls); | |
864 | error_sensor: | |
865 | mutex_destroy(&sensor->lock); | |
251cb88e MH |
866 | return ret; |
867 | } | |
868 | ||
869 | static int mt9m032_remove(struct i2c_client *client) | |
870 | { | |
871 | struct v4l2_subdev *subdev = i2c_get_clientdata(client); | |
872 | struct mt9m032 *sensor = to_mt9m032(subdev); | |
873 | ||
b22b9f32 | 874 | v4l2_device_unregister_subdev(subdev); |
251cb88e | 875 | v4l2_ctrl_handler_free(&sensor->ctrls); |
b22b9f32 | 876 | media_entity_cleanup(&subdev->entity); |
251cb88e | 877 | mutex_destroy(&sensor->lock); |
251cb88e MH |
878 | return 0; |
879 | } | |
880 | ||
881 | static const struct i2c_device_id mt9m032_id_table[] = { | |
882 | { MT9M032_NAME, 0 }, | |
883 | { } | |
884 | }; | |
885 | ||
886 | MODULE_DEVICE_TABLE(i2c, mt9m032_id_table); | |
887 | ||
888 | static struct i2c_driver mt9m032_i2c_driver = { | |
889 | .driver = { | |
890 | .name = MT9M032_NAME, | |
891 | }, | |
892 | .probe = mt9m032_probe, | |
893 | .remove = mt9m032_remove, | |
894 | .id_table = mt9m032_id_table, | |
895 | }; | |
896 | ||
897 | module_i2c_driver(mt9m032_i2c_driver); | |
898 | ||
899 | MODULE_AUTHOR("Martin Hostettler <martin@neutronstar.dyndns.org>"); | |
900 | MODULE_DESCRIPTION("MT9M032 camera sensor driver"); | |
901 | MODULE_LICENSE("GPL v2"); |