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f523dd0d GL |
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 | ||
979ea1dd | 16 | #include <media/v4l2-subdev.h> |
f523dd0d GL |
17 | #include <media/v4l2-chip-ident.h> |
18 | #include <media/soc_camera.h> | |
19 | ||
5d28d525 GL |
20 | /* |
21 | * mt9m001 i2c address 0x5d | |
979ea1dd | 22 | * The platform has to define ctruct i2c_board_info objects and link to them |
5d28d525 GL |
23 | * from struct soc_camera_link |
24 | */ | |
f523dd0d GL |
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 | ||
6a6c8786 GL |
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 | ||
f523dd0d | 51 | static const struct soc_camera_data_format mt9m001_colour_formats[] = { |
5d28d525 GL |
52 | /* |
53 | * Order important: first natively supported, | |
54 | * second supported with a GPIO extender | |
55 | */ | |
f523dd0d | 56 | { |
bb55de3b GL |
57 | .name = "Bayer (sRGB) 10 bit", |
58 | .depth = 10, | |
59 | .fourcc = V4L2_PIX_FMT_SBGGR16, | |
60 | .colorspace = V4L2_COLORSPACE_SRGB, | |
61 | }, { | |
62 | .name = "Bayer (sRGB) 8 bit", | |
63 | .depth = 8, | |
f523dd0d GL |
64 | .fourcc = V4L2_PIX_FMT_SBGGR8, |
65 | .colorspace = V4L2_COLORSPACE_SRGB, | |
66 | } | |
67 | }; | |
68 | ||
69 | static const struct soc_camera_data_format mt9m001_monochrome_formats[] = { | |
bb55de3b | 70 | /* Order important - see above */ |
f523dd0d GL |
71 | { |
72 | .name = "Monochrome 10 bit", | |
73 | .depth = 10, | |
74 | .fourcc = V4L2_PIX_FMT_Y16, | |
75 | }, { | |
76 | .name = "Monochrome 8 bit", | |
77 | .depth = 8, | |
78 | .fourcc = V4L2_PIX_FMT_GREY, | |
79 | }, | |
80 | }; | |
81 | ||
82 | struct mt9m001 { | |
979ea1dd | 83 | struct v4l2_subdev subdev; |
6a6c8786 GL |
84 | struct v4l2_rect rect; /* Sensor window */ |
85 | __u32 fourcc; | |
f523dd0d | 86 | int model; /* V4L2_IDENT_MT9M001* codes from v4l2-chip-ident.h */ |
96c75399 GL |
87 | unsigned int gain; |
88 | unsigned int exposure; | |
32536108 | 89 | unsigned short y_skip_top; /* Lines to skip at the top */ |
f523dd0d | 90 | unsigned char autoexposure; |
f523dd0d GL |
91 | }; |
92 | ||
979ea1dd GL |
93 | static struct mt9m001 *to_mt9m001(const struct i2c_client *client) |
94 | { | |
95 | return container_of(i2c_get_clientdata(client), struct mt9m001, subdev); | |
96 | } | |
97 | ||
9538e1c2 | 98 | static int reg_read(struct i2c_client *client, const u8 reg) |
f523dd0d | 99 | { |
f523dd0d GL |
100 | s32 data = i2c_smbus_read_word_data(client, reg); |
101 | return data < 0 ? data : swab16(data); | |
102 | } | |
103 | ||
9538e1c2 | 104 | static int reg_write(struct i2c_client *client, const u8 reg, |
f523dd0d GL |
105 | const u16 data) |
106 | { | |
9538e1c2 | 107 | return i2c_smbus_write_word_data(client, reg, swab16(data)); |
f523dd0d GL |
108 | } |
109 | ||
9538e1c2 | 110 | static int reg_set(struct i2c_client *client, const u8 reg, |
f523dd0d GL |
111 | const u16 data) |
112 | { | |
113 | int ret; | |
114 | ||
9538e1c2 | 115 | ret = reg_read(client, reg); |
f523dd0d GL |
116 | if (ret < 0) |
117 | return ret; | |
9538e1c2 | 118 | return reg_write(client, reg, ret | data); |
f523dd0d GL |
119 | } |
120 | ||
9538e1c2 | 121 | static int reg_clear(struct i2c_client *client, const u8 reg, |
f523dd0d GL |
122 | const u16 data) |
123 | { | |
124 | int ret; | |
125 | ||
9538e1c2 | 126 | ret = reg_read(client, reg); |
f523dd0d GL |
127 | if (ret < 0) |
128 | return ret; | |
9538e1c2 | 129 | return reg_write(client, reg, ret & ~data); |
f523dd0d GL |
130 | } |
131 | ||
a4c56fd8 | 132 | static int mt9m001_init(struct i2c_client *client) |
f523dd0d GL |
133 | { |
134 | int ret; | |
135 | ||
85f8be68 | 136 | dev_dbg(&client->dev, "%s\n", __func__); |
f523dd0d | 137 | |
979ea1dd | 138 | /* |
96c75399 GL |
139 | * We don't know, whether platform provides reset, issue a soft reset |
140 | * too. This returns all registers to their default values. | |
979ea1dd GL |
141 | */ |
142 | ret = reg_write(client, MT9M001_RESET, 1); | |
143 | if (!ret) | |
144 | ret = reg_write(client, MT9M001_RESET, 0); | |
81034663 | 145 | |
11211641 GL |
146 | /* Disable chip, synchronous option update */ |
147 | if (!ret) | |
9538e1c2 | 148 | ret = reg_write(client, MT9M001_OUTPUT_CONTROL, 0); |
f523dd0d | 149 | |
11211641 | 150 | return ret; |
f523dd0d GL |
151 | } |
152 | ||
979ea1dd | 153 | static int mt9m001_s_stream(struct v4l2_subdev *sd, int enable) |
f523dd0d | 154 | { |
979ea1dd | 155 | struct i2c_client *client = sd->priv; |
9538e1c2 | 156 | |
979ea1dd GL |
157 | /* Switch to master "normal" mode or stop sensor readout */ |
158 | if (reg_write(client, MT9M001_OUTPUT_CONTROL, enable ? 2 : 0) < 0) | |
f523dd0d GL |
159 | return -EIO; |
160 | return 0; | |
161 | } | |
162 | ||
ad5f2e85 GL |
163 | static int mt9m001_set_bus_param(struct soc_camera_device *icd, |
164 | unsigned long flags) | |
f523dd0d | 165 | { |
40e2e092 | 166 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
36034dc3 | 167 | unsigned long width_flag = flags & SOCAM_DATAWIDTH_MASK; |
f523dd0d | 168 | |
36034dc3 SH |
169 | /* Only one width bit may be set */ |
170 | if (!is_power_of_2(width_flag)) | |
171 | return -EINVAL; | |
f523dd0d | 172 | |
36034dc3 SH |
173 | if (icl->set_bus_param) |
174 | return icl->set_bus_param(icl, width_flag); | |
f523dd0d | 175 | |
36034dc3 SH |
176 | /* |
177 | * Without board specific bus width settings we only support the | |
178 | * sensors native bus width | |
179 | */ | |
180 | if (width_flag == SOCAM_DATAWIDTH_10) | |
181 | return 0; | |
f523dd0d | 182 | |
36034dc3 | 183 | return -EINVAL; |
ad5f2e85 GL |
184 | } |
185 | ||
186 | static unsigned long mt9m001_query_bus_param(struct soc_camera_device *icd) | |
187 | { | |
40e2e092 | 188 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
bd73b36f | 189 | /* MT9M001 has all capture_format parameters fixed */ |
e951cbf2 | 190 | unsigned long flags = SOCAM_PCLK_SAMPLE_FALLING | |
bd73b36f | 191 | SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_HIGH | |
2d9329f3 | 192 | SOCAM_DATA_ACTIVE_HIGH | SOCAM_MASTER; |
ad5f2e85 | 193 | |
36034dc3 SH |
194 | if (icl->query_bus_param) |
195 | flags |= icl->query_bus_param(icl) & SOCAM_DATAWIDTH_MASK; | |
196 | else | |
197 | flags |= SOCAM_DATAWIDTH_10; | |
ad5f2e85 | 198 | |
bd73b36f | 199 | return soc_camera_apply_sensor_flags(icl, flags); |
ad5f2e85 GL |
200 | } |
201 | ||
08590b96 | 202 | static int mt9m001_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) |
ad5f2e85 | 203 | { |
08590b96 | 204 | struct i2c_client *client = sd->priv; |
979ea1dd | 205 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
6a6c8786 | 206 | struct v4l2_rect rect = a->c; |
08590b96 | 207 | struct soc_camera_device *icd = client->dev.platform_data; |
ad5f2e85 GL |
208 | int ret; |
209 | const u16 hblank = 9, vblank = 25; | |
96c75399 | 210 | unsigned int total_h; |
ad5f2e85 | 211 | |
6a6c8786 GL |
212 | if (mt9m001->fourcc == V4L2_PIX_FMT_SBGGR8 || |
213 | mt9m001->fourcc == V4L2_PIX_FMT_SBGGR16) | |
214 | /* | |
215 | * Bayer format - even number of rows for simplicity, | |
216 | * but let the user play with the top row. | |
217 | */ | |
218 | rect.height = ALIGN(rect.height, 2); | |
219 | ||
220 | /* Datasheet requirement: see register description */ | |
221 | rect.width = ALIGN(rect.width, 2); | |
222 | rect.left = ALIGN(rect.left, 2); | |
223 | ||
224 | soc_camera_limit_side(&rect.left, &rect.width, | |
225 | MT9M001_COLUMN_SKIP, MT9M001_MIN_WIDTH, MT9M001_MAX_WIDTH); | |
226 | ||
227 | soc_camera_limit_side(&rect.top, &rect.height, | |
228 | MT9M001_ROW_SKIP, MT9M001_MIN_HEIGHT, MT9M001_MAX_HEIGHT); | |
229 | ||
32536108 | 230 | total_h = rect.height + mt9m001->y_skip_top + vblank; |
96c75399 | 231 | |
f523dd0d | 232 | /* Blanking and start values - default... */ |
9538e1c2 | 233 | ret = reg_write(client, MT9M001_HORIZONTAL_BLANKING, hblank); |
11211641 | 234 | if (!ret) |
9538e1c2 | 235 | ret = reg_write(client, MT9M001_VERTICAL_BLANKING, vblank); |
f523dd0d | 236 | |
5d28d525 GL |
237 | /* |
238 | * The caller provides a supported format, as verified per | |
239 | * call to icd->try_fmt() | |
240 | */ | |
11211641 | 241 | if (!ret) |
6a6c8786 | 242 | ret = reg_write(client, MT9M001_COLUMN_START, rect.left); |
11211641 | 243 | if (!ret) |
6a6c8786 | 244 | ret = reg_write(client, MT9M001_ROW_START, rect.top); |
11211641 | 245 | if (!ret) |
6a6c8786 | 246 | ret = reg_write(client, MT9M001_WINDOW_WIDTH, rect.width - 1); |
11211641 | 247 | if (!ret) |
9538e1c2 | 248 | ret = reg_write(client, MT9M001_WINDOW_HEIGHT, |
32536108 | 249 | rect.height + mt9m001->y_skip_top - 1); |
11211641 | 250 | if (!ret && mt9m001->autoexposure) { |
96c75399 | 251 | ret = reg_write(client, MT9M001_SHUTTER_WIDTH, total_h); |
11211641 | 252 | if (!ret) { |
f523dd0d GL |
253 | const struct v4l2_queryctrl *qctrl = |
254 | soc_camera_find_qctrl(icd->ops, | |
255 | V4L2_CID_EXPOSURE); | |
96c75399 GL |
256 | mt9m001->exposure = (524 + (total_h - 1) * |
257 | (qctrl->maximum - qctrl->minimum)) / | |
f523dd0d GL |
258 | 1048 + qctrl->minimum; |
259 | } | |
260 | } | |
261 | ||
6a6c8786 GL |
262 | if (!ret) |
263 | mt9m001->rect = rect; | |
264 | ||
11211641 | 265 | return ret; |
f523dd0d GL |
266 | } |
267 | ||
6a6c8786 GL |
268 | static int mt9m001_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) |
269 | { | |
270 | struct i2c_client *client = sd->priv; | |
271 | struct mt9m001 *mt9m001 = to_mt9m001(client); | |
272 | ||
273 | a->c = mt9m001->rect; | |
274 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
275 | ||
276 | return 0; | |
277 | } | |
278 | ||
279 | static int mt9m001_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a) | |
280 | { | |
281 | a->bounds.left = MT9M001_COLUMN_SKIP; | |
282 | a->bounds.top = MT9M001_ROW_SKIP; | |
283 | a->bounds.width = MT9M001_MAX_WIDTH; | |
284 | a->bounds.height = MT9M001_MAX_HEIGHT; | |
285 | a->defrect = a->bounds; | |
286 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
287 | a->pixelaspect.numerator = 1; | |
288 | a->pixelaspect.denominator = 1; | |
289 | ||
290 | return 0; | |
291 | } | |
292 | ||
293 | static int mt9m001_g_fmt(struct v4l2_subdev *sd, struct v4l2_format *f) | |
294 | { | |
295 | struct i2c_client *client = sd->priv; | |
296 | struct mt9m001 *mt9m001 = to_mt9m001(client); | |
297 | struct v4l2_pix_format *pix = &f->fmt.pix; | |
298 | ||
299 | pix->width = mt9m001->rect.width; | |
300 | pix->height = mt9m001->rect.height; | |
301 | pix->pixelformat = mt9m001->fourcc; | |
302 | pix->field = V4L2_FIELD_NONE; | |
303 | pix->colorspace = V4L2_COLORSPACE_SRGB; | |
304 | ||
305 | return 0; | |
306 | } | |
307 | ||
979ea1dd | 308 | static int mt9m001_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *f) |
09e231b3 | 309 | { |
979ea1dd | 310 | struct i2c_client *client = sd->priv; |
6a6c8786 GL |
311 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
312 | struct v4l2_pix_format *pix = &f->fmt.pix; | |
08590b96 GL |
313 | struct v4l2_crop a = { |
314 | .c = { | |
6a6c8786 GL |
315 | .left = mt9m001->rect.left, |
316 | .top = mt9m001->rect.top, | |
317 | .width = pix->width, | |
318 | .height = pix->height, | |
08590b96 | 319 | }, |
09e231b3 | 320 | }; |
6a6c8786 | 321 | int ret; |
09e231b3 GL |
322 | |
323 | /* No support for scaling so far, just crop. TODO: use skipping */ | |
6a6c8786 GL |
324 | ret = mt9m001_s_crop(sd, &a); |
325 | if (!ret) { | |
326 | pix->width = mt9m001->rect.width; | |
327 | pix->height = mt9m001->rect.height; | |
328 | mt9m001->fourcc = pix->pixelformat; | |
329 | } | |
330 | ||
331 | return ret; | |
09e231b3 GL |
332 | } |
333 | ||
979ea1dd | 334 | static int mt9m001_try_fmt(struct v4l2_subdev *sd, struct v4l2_format *f) |
f523dd0d | 335 | { |
979ea1dd | 336 | struct i2c_client *client = sd->priv; |
32536108 | 337 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
64f5905e GL |
338 | struct v4l2_pix_format *pix = &f->fmt.pix; |
339 | ||
6a6c8786 GL |
340 | v4l_bound_align_image(&pix->width, MT9M001_MIN_WIDTH, |
341 | MT9M001_MAX_WIDTH, 1, | |
32536108 GL |
342 | &pix->height, MT9M001_MIN_HEIGHT + mt9m001->y_skip_top, |
343 | MT9M001_MAX_HEIGHT + mt9m001->y_skip_top, 0, 0); | |
6a6c8786 GL |
344 | |
345 | if (pix->pixelformat == V4L2_PIX_FMT_SBGGR8 || | |
346 | pix->pixelformat == V4L2_PIX_FMT_SBGGR16) | |
347 | pix->height = ALIGN(pix->height - 1, 2); | |
f523dd0d GL |
348 | |
349 | return 0; | |
350 | } | |
351 | ||
979ea1dd GL |
352 | static int mt9m001_g_chip_ident(struct v4l2_subdev *sd, |
353 | struct v4l2_dbg_chip_ident *id) | |
f523dd0d | 354 | { |
979ea1dd GL |
355 | struct i2c_client *client = sd->priv; |
356 | struct mt9m001 *mt9m001 = to_mt9m001(client); | |
f523dd0d | 357 | |
aecde8b5 | 358 | if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR) |
f523dd0d GL |
359 | return -EINVAL; |
360 | ||
40e2e092 | 361 | if (id->match.addr != client->addr) |
f523dd0d GL |
362 | return -ENODEV; |
363 | ||
364 | id->ident = mt9m001->model; | |
365 | id->revision = 0; | |
366 | ||
367 | return 0; | |
368 | } | |
369 | ||
370 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
979ea1dd GL |
371 | static int mt9m001_g_register(struct v4l2_subdev *sd, |
372 | struct v4l2_dbg_register *reg) | |
f523dd0d | 373 | { |
979ea1dd | 374 | struct i2c_client *client = sd->priv; |
f523dd0d | 375 | |
aecde8b5 | 376 | if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) |
f523dd0d GL |
377 | return -EINVAL; |
378 | ||
9538e1c2 | 379 | if (reg->match.addr != client->addr) |
f523dd0d GL |
380 | return -ENODEV; |
381 | ||
aecde8b5 | 382 | reg->size = 2; |
9538e1c2 | 383 | reg->val = reg_read(client, reg->reg); |
f523dd0d GL |
384 | |
385 | if (reg->val > 0xffff) | |
386 | return -EIO; | |
387 | ||
388 | return 0; | |
389 | } | |
390 | ||
979ea1dd GL |
391 | static int mt9m001_s_register(struct v4l2_subdev *sd, |
392 | struct v4l2_dbg_register *reg) | |
f523dd0d | 393 | { |
979ea1dd | 394 | struct i2c_client *client = sd->priv; |
f523dd0d | 395 | |
aecde8b5 | 396 | if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) |
f523dd0d GL |
397 | return -EINVAL; |
398 | ||
9538e1c2 | 399 | if (reg->match.addr != client->addr) |
f523dd0d GL |
400 | return -ENODEV; |
401 | ||
9538e1c2 | 402 | if (reg_write(client, reg->reg, reg->val) < 0) |
f523dd0d GL |
403 | return -EIO; |
404 | ||
405 | return 0; | |
406 | } | |
407 | #endif | |
408 | ||
4407a463 | 409 | static const struct v4l2_queryctrl mt9m001_controls[] = { |
f523dd0d GL |
410 | { |
411 | .id = V4L2_CID_VFLIP, | |
412 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
413 | .name = "Flip Vertically", | |
414 | .minimum = 0, | |
415 | .maximum = 1, | |
416 | .step = 1, | |
417 | .default_value = 0, | |
418 | }, { | |
419 | .id = V4L2_CID_GAIN, | |
420 | .type = V4L2_CTRL_TYPE_INTEGER, | |
421 | .name = "Gain", | |
422 | .minimum = 0, | |
423 | .maximum = 127, | |
424 | .step = 1, | |
425 | .default_value = 64, | |
426 | .flags = V4L2_CTRL_FLAG_SLIDER, | |
427 | }, { | |
428 | .id = V4L2_CID_EXPOSURE, | |
429 | .type = V4L2_CTRL_TYPE_INTEGER, | |
430 | .name = "Exposure", | |
431 | .minimum = 1, | |
432 | .maximum = 255, | |
433 | .step = 1, | |
434 | .default_value = 255, | |
435 | .flags = V4L2_CTRL_FLAG_SLIDER, | |
436 | }, { | |
437 | .id = V4L2_CID_EXPOSURE_AUTO, | |
438 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
439 | .name = "Automatic Exposure", | |
440 | .minimum = 0, | |
441 | .maximum = 1, | |
442 | .step = 1, | |
443 | .default_value = 1, | |
444 | } | |
445 | }; | |
446 | ||
f523dd0d | 447 | static struct soc_camera_ops mt9m001_ops = { |
ad5f2e85 GL |
448 | .set_bus_param = mt9m001_set_bus_param, |
449 | .query_bus_param = mt9m001_query_bus_param, | |
f523dd0d GL |
450 | .controls = mt9m001_controls, |
451 | .num_controls = ARRAY_SIZE(mt9m001_controls), | |
f523dd0d GL |
452 | }; |
453 | ||
979ea1dd | 454 | static int mt9m001_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
f523dd0d | 455 | { |
979ea1dd GL |
456 | struct i2c_client *client = sd->priv; |
457 | struct mt9m001 *mt9m001 = to_mt9m001(client); | |
f523dd0d GL |
458 | int data; |
459 | ||
460 | switch (ctrl->id) { | |
461 | case V4L2_CID_VFLIP: | |
9538e1c2 | 462 | data = reg_read(client, MT9M001_READ_OPTIONS2); |
f523dd0d GL |
463 | if (data < 0) |
464 | return -EIO; | |
465 | ctrl->value = !!(data & 0x8000); | |
466 | break; | |
467 | case V4L2_CID_EXPOSURE_AUTO: | |
468 | ctrl->value = mt9m001->autoexposure; | |
469 | break; | |
96c75399 GL |
470 | case V4L2_CID_GAIN: |
471 | ctrl->value = mt9m001->gain; | |
472 | break; | |
473 | case V4L2_CID_EXPOSURE: | |
474 | ctrl->value = mt9m001->exposure; | |
475 | break; | |
f523dd0d GL |
476 | } |
477 | return 0; | |
478 | } | |
479 | ||
979ea1dd | 480 | static int mt9m001_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
f523dd0d | 481 | { |
979ea1dd GL |
482 | struct i2c_client *client = sd->priv; |
483 | struct mt9m001 *mt9m001 = to_mt9m001(client); | |
484 | struct soc_camera_device *icd = client->dev.platform_data; | |
f523dd0d GL |
485 | const struct v4l2_queryctrl *qctrl; |
486 | int data; | |
487 | ||
488 | qctrl = soc_camera_find_qctrl(&mt9m001_ops, ctrl->id); | |
489 | ||
490 | if (!qctrl) | |
491 | return -EINVAL; | |
492 | ||
493 | switch (ctrl->id) { | |
494 | case V4L2_CID_VFLIP: | |
495 | if (ctrl->value) | |
9538e1c2 | 496 | data = reg_set(client, MT9M001_READ_OPTIONS2, 0x8000); |
f523dd0d | 497 | else |
9538e1c2 | 498 | data = reg_clear(client, MT9M001_READ_OPTIONS2, 0x8000); |
f523dd0d GL |
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 | ||
85f8be68 | 511 | dev_dbg(&client->dev, "Setting gain %d\n", data); |
9538e1c2 | 512 | data = reg_write(client, MT9M001_GLOBAL_GAIN, data); |
f523dd0d GL |
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 | ||
85f8be68 | 529 | dev_dbg(&client->dev, "Setting gain from %d to %d\n", |
9538e1c2 GL |
530 | reg_read(client, MT9M001_GLOBAL_GAIN), data); |
531 | data = reg_write(client, MT9M001_GLOBAL_GAIN, data); | |
f523dd0d GL |
532 | if (data < 0) |
533 | return -EIO; | |
534 | } | |
535 | ||
536 | /* Success */ | |
96c75399 | 537 | mt9m001->gain = ctrl->value; |
f523dd0d GL |
538 | break; |
539 | case V4L2_CID_EXPOSURE: | |
540 | /* mt9m001 has maximum == default */ | |
541 | if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum) | |
542 | return -EINVAL; | |
543 | else { | |
544 | unsigned long range = qctrl->maximum - qctrl->minimum; | |
545 | unsigned long shutter = ((ctrl->value - qctrl->minimum) * 1048 + | |
546 | range / 2) / range + 1; | |
547 | ||
85f8be68 GL |
548 | dev_dbg(&client->dev, |
549 | "Setting shutter width from %d to %lu\n", | |
550 | reg_read(client, MT9M001_SHUTTER_WIDTH), | |
551 | shutter); | |
9538e1c2 | 552 | if (reg_write(client, MT9M001_SHUTTER_WIDTH, shutter) < 0) |
f523dd0d | 553 | return -EIO; |
96c75399 | 554 | mt9m001->exposure = ctrl->value; |
f523dd0d GL |
555 | mt9m001->autoexposure = 0; |
556 | } | |
557 | break; | |
558 | case V4L2_CID_EXPOSURE_AUTO: | |
559 | if (ctrl->value) { | |
560 | const u16 vblank = 25; | |
96c75399 | 561 | unsigned int total_h = mt9m001->rect.height + |
32536108 | 562 | mt9m001->y_skip_top + vblank; |
a0705b07 | 563 | if (reg_write(client, MT9M001_SHUTTER_WIDTH, |
96c75399 | 564 | total_h) < 0) |
f523dd0d GL |
565 | return -EIO; |
566 | qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE); | |
96c75399 GL |
567 | mt9m001->exposure = (524 + (total_h - 1) * |
568 | (qctrl->maximum - qctrl->minimum)) / | |
f523dd0d GL |
569 | 1048 + qctrl->minimum; |
570 | mt9m001->autoexposure = 1; | |
571 | } else | |
572 | mt9m001->autoexposure = 0; | |
573 | break; | |
574 | } | |
575 | return 0; | |
576 | } | |
577 | ||
5d28d525 GL |
578 | /* |
579 | * Interface active, can use i2c. If it fails, it can indeed mean, that | |
580 | * this wasn't our capture interface, so, we wait for the right one | |
581 | */ | |
40e2e092 GL |
582 | static int mt9m001_video_probe(struct soc_camera_device *icd, |
583 | struct i2c_client *client) | |
f523dd0d | 584 | { |
979ea1dd | 585 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
40e2e092 | 586 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
f523dd0d | 587 | s32 data; |
36034dc3 | 588 | unsigned long flags; |
a4c56fd8 | 589 | int ret; |
f523dd0d | 590 | |
5d28d525 GL |
591 | /* |
592 | * We must have a parent by now. And it cannot be a wrong one. | |
593 | * So this entire test is completely redundant. | |
594 | */ | |
f523dd0d GL |
595 | if (!icd->dev.parent || |
596 | to_soc_camera_host(icd->dev.parent)->nr != icd->iface) | |
597 | return -ENODEV; | |
598 | ||
599 | /* Enable the chip */ | |
9538e1c2 | 600 | data = reg_write(client, MT9M001_CHIP_ENABLE, 1); |
85f8be68 | 601 | dev_dbg(&client->dev, "write: %d\n", data); |
f523dd0d GL |
602 | |
603 | /* Read out the chip version register */ | |
9538e1c2 | 604 | data = reg_read(client, MT9M001_CHIP_VERSION); |
f523dd0d GL |
605 | |
606 | /* must be 0x8411 or 0x8421 for colour sensor and 8431 for bw */ | |
607 | switch (data) { | |
608 | case 0x8411: | |
609 | case 0x8421: | |
610 | mt9m001->model = V4L2_IDENT_MT9M001C12ST; | |
26f1b942 | 611 | icd->formats = mt9m001_colour_formats; |
f523dd0d GL |
612 | break; |
613 | case 0x8431: | |
614 | mt9m001->model = V4L2_IDENT_MT9M001C12STM; | |
26f1b942 | 615 | icd->formats = mt9m001_monochrome_formats; |
f523dd0d GL |
616 | break; |
617 | default: | |
85f8be68 | 618 | dev_err(&client->dev, |
f523dd0d | 619 | "No MT9M001 chip detected, register read %x\n", data); |
40e2e092 | 620 | return -ENODEV; |
f523dd0d GL |
621 | } |
622 | ||
36034dc3 SH |
623 | icd->num_formats = 0; |
624 | ||
625 | /* | |
626 | * This is a 10bit sensor, so by default we only allow 10bit. | |
627 | * The platform may support different bus widths due to | |
628 | * different routing of the data lines. | |
629 | */ | |
630 | if (icl->query_bus_param) | |
631 | flags = icl->query_bus_param(icl); | |
632 | else | |
633 | flags = SOCAM_DATAWIDTH_10; | |
634 | ||
635 | if (flags & SOCAM_DATAWIDTH_10) | |
636 | icd->num_formats++; | |
637 | else | |
638 | icd->formats++; | |
639 | ||
640 | if (flags & SOCAM_DATAWIDTH_8) | |
641 | icd->num_formats++; | |
642 | ||
6a6c8786 GL |
643 | mt9m001->fourcc = icd->formats->fourcc; |
644 | ||
85f8be68 | 645 | dev_info(&client->dev, "Detected a MT9M001 chip ID %x (%s)\n", data, |
f523dd0d GL |
646 | data == 0x8431 ? "C12STM" : "C12ST"); |
647 | ||
a4c56fd8 GL |
648 | ret = mt9m001_init(client); |
649 | if (ret < 0) | |
650 | dev_err(&client->dev, "Failed to initialise the camera\n"); | |
651 | ||
96c75399 GL |
652 | /* mt9m001_init() has reset the chip, returning registers to defaults */ |
653 | mt9m001->gain = 64; | |
654 | mt9m001->exposure = 255; | |
655 | ||
a4c56fd8 | 656 | return ret; |
f523dd0d GL |
657 | } |
658 | ||
659 | static void mt9m001_video_remove(struct soc_camera_device *icd) | |
660 | { | |
40e2e092 | 661 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
f523dd0d | 662 | |
6a6c8786 | 663 | dev_dbg(&icd->dev, "Video removed: %p, %p\n", |
a85bdace | 664 | icd->dev.parent, icd->vdev); |
594bb46d GL |
665 | if (icl->free_bus) |
666 | icl->free_bus(icl); | |
f523dd0d GL |
667 | } |
668 | ||
32536108 GL |
669 | static int mt9m001_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines) |
670 | { | |
671 | struct i2c_client *client = sd->priv; | |
672 | struct mt9m001 *mt9m001 = to_mt9m001(client); | |
673 | ||
674 | *lines = mt9m001->y_skip_top; | |
675 | ||
676 | return 0; | |
677 | } | |
678 | ||
979ea1dd GL |
679 | static struct v4l2_subdev_core_ops mt9m001_subdev_core_ops = { |
680 | .g_ctrl = mt9m001_g_ctrl, | |
681 | .s_ctrl = mt9m001_s_ctrl, | |
682 | .g_chip_ident = mt9m001_g_chip_ident, | |
683 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
684 | .g_register = mt9m001_g_register, | |
685 | .s_register = mt9m001_s_register, | |
686 | #endif | |
687 | }; | |
688 | ||
689 | static struct v4l2_subdev_video_ops mt9m001_subdev_video_ops = { | |
690 | .s_stream = mt9m001_s_stream, | |
691 | .s_fmt = mt9m001_s_fmt, | |
6a6c8786 | 692 | .g_fmt = mt9m001_g_fmt, |
979ea1dd | 693 | .try_fmt = mt9m001_try_fmt, |
08590b96 | 694 | .s_crop = mt9m001_s_crop, |
6a6c8786 GL |
695 | .g_crop = mt9m001_g_crop, |
696 | .cropcap = mt9m001_cropcap, | |
979ea1dd GL |
697 | }; |
698 | ||
32536108 GL |
699 | static struct v4l2_subdev_sensor_ops mt9m001_subdev_sensor_ops = { |
700 | .g_skip_top_lines = mt9m001_g_skip_top_lines, | |
701 | }; | |
702 | ||
979ea1dd GL |
703 | static struct v4l2_subdev_ops mt9m001_subdev_ops = { |
704 | .core = &mt9m001_subdev_core_ops, | |
705 | .video = &mt9m001_subdev_video_ops, | |
32536108 | 706 | .sensor = &mt9m001_subdev_sensor_ops, |
979ea1dd GL |
707 | }; |
708 | ||
d2653e92 JD |
709 | static int mt9m001_probe(struct i2c_client *client, |
710 | const struct i2c_device_id *did) | |
f523dd0d GL |
711 | { |
712 | struct mt9m001 *mt9m001; | |
40e2e092 | 713 | struct soc_camera_device *icd = client->dev.platform_data; |
f523dd0d | 714 | struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); |
40e2e092 | 715 | struct soc_camera_link *icl; |
f523dd0d GL |
716 | int ret; |
717 | ||
40e2e092 GL |
718 | if (!icd) { |
719 | dev_err(&client->dev, "MT9M001: missing soc-camera data!\n"); | |
720 | return -EINVAL; | |
721 | } | |
722 | ||
723 | icl = to_soc_camera_link(icd); | |
f523dd0d GL |
724 | if (!icl) { |
725 | dev_err(&client->dev, "MT9M001 driver needs platform data\n"); | |
726 | return -EINVAL; | |
727 | } | |
728 | ||
729 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) { | |
730 | dev_warn(&adapter->dev, | |
731 | "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n"); | |
732 | return -EIO; | |
733 | } | |
734 | ||
735 | mt9m001 = kzalloc(sizeof(struct mt9m001), GFP_KERNEL); | |
736 | if (!mt9m001) | |
737 | return -ENOMEM; | |
738 | ||
979ea1dd | 739 | v4l2_i2c_subdev_init(&mt9m001->subdev, client, &mt9m001_subdev_ops); |
f523dd0d GL |
740 | |
741 | /* Second stage probe - when a capture adapter is there */ | |
a0705b07 | 742 | icd->ops = &mt9m001_ops; |
6a6c8786 | 743 | |
32536108 | 744 | mt9m001->y_skip_top = 0; |
6a6c8786 GL |
745 | mt9m001->rect.left = MT9M001_COLUMN_SKIP; |
746 | mt9m001->rect.top = MT9M001_ROW_SKIP; | |
747 | mt9m001->rect.width = MT9M001_MAX_WIDTH; | |
748 | mt9m001->rect.height = MT9M001_MAX_HEIGHT; | |
749 | ||
5d28d525 GL |
750 | /* |
751 | * Simulated autoexposure. If enabled, we calculate shutter width | |
752 | * ourselves in the driver based on vertical blanking and frame width | |
753 | */ | |
f523dd0d GL |
754 | mt9m001->autoexposure = 1; |
755 | ||
40e2e092 GL |
756 | ret = mt9m001_video_probe(icd, client); |
757 | if (ret) { | |
758 | icd->ops = NULL; | |
759 | i2c_set_clientdata(client, NULL); | |
760 | kfree(mt9m001); | |
761 | } | |
f523dd0d | 762 | |
f523dd0d GL |
763 | return ret; |
764 | } | |
765 | ||
766 | static int mt9m001_remove(struct i2c_client *client) | |
767 | { | |
979ea1dd | 768 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
40e2e092 | 769 | struct soc_camera_device *icd = client->dev.platform_data; |
f523dd0d | 770 | |
40e2e092 GL |
771 | icd->ops = NULL; |
772 | mt9m001_video_remove(icd); | |
773 | i2c_set_clientdata(client, NULL); | |
774 | client->driver = NULL; | |
f523dd0d GL |
775 | kfree(mt9m001); |
776 | ||
777 | return 0; | |
778 | } | |
779 | ||
3760f736 JD |
780 | static const struct i2c_device_id mt9m001_id[] = { |
781 | { "mt9m001", 0 }, | |
782 | { } | |
783 | }; | |
784 | MODULE_DEVICE_TABLE(i2c, mt9m001_id); | |
785 | ||
f523dd0d GL |
786 | static struct i2c_driver mt9m001_i2c_driver = { |
787 | .driver = { | |
788 | .name = "mt9m001", | |
789 | }, | |
790 | .probe = mt9m001_probe, | |
791 | .remove = mt9m001_remove, | |
3760f736 | 792 | .id_table = mt9m001_id, |
f523dd0d GL |
793 | }; |
794 | ||
795 | static int __init mt9m001_mod_init(void) | |
796 | { | |
797 | return i2c_add_driver(&mt9m001_i2c_driver); | |
798 | } | |
799 | ||
800 | static void __exit mt9m001_mod_exit(void) | |
801 | { | |
802 | i2c_del_driver(&mt9m001_i2c_driver); | |
803 | } | |
804 | ||
805 | module_init(mt9m001_mod_init); | |
806 | module_exit(mt9m001_mod_exit); | |
807 | ||
808 | MODULE_DESCRIPTION("Micron MT9M001 Camera driver"); | |
809 | MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>"); | |
810 | MODULE_LICENSE("GPL"); |