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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 | ||
f523dd0d | 20 | /* mt9m001 i2c address 0x5d |
979ea1dd GL |
21 | * The platform has to define ctruct i2c_board_info objects and link to them |
22 | * from struct soc_camera_link */ | |
f523dd0d GL |
23 | |
24 | /* mt9m001 selected register addresses */ | |
25 | #define MT9M001_CHIP_VERSION 0x00 | |
26 | #define MT9M001_ROW_START 0x01 | |
27 | #define MT9M001_COLUMN_START 0x02 | |
28 | #define MT9M001_WINDOW_HEIGHT 0x03 | |
29 | #define MT9M001_WINDOW_WIDTH 0x04 | |
30 | #define MT9M001_HORIZONTAL_BLANKING 0x05 | |
31 | #define MT9M001_VERTICAL_BLANKING 0x06 | |
32 | #define MT9M001_OUTPUT_CONTROL 0x07 | |
33 | #define MT9M001_SHUTTER_WIDTH 0x09 | |
34 | #define MT9M001_FRAME_RESTART 0x0b | |
35 | #define MT9M001_SHUTTER_DELAY 0x0c | |
36 | #define MT9M001_RESET 0x0d | |
37 | #define MT9M001_READ_OPTIONS1 0x1e | |
38 | #define MT9M001_READ_OPTIONS2 0x20 | |
39 | #define MT9M001_GLOBAL_GAIN 0x35 | |
40 | #define MT9M001_CHIP_ENABLE 0xF1 | |
41 | ||
6a6c8786 GL |
42 | #define MT9M001_MAX_WIDTH 1280 |
43 | #define MT9M001_MAX_HEIGHT 1024 | |
44 | #define MT9M001_MIN_WIDTH 48 | |
45 | #define MT9M001_MIN_HEIGHT 32 | |
46 | #define MT9M001_COLUMN_SKIP 20 | |
47 | #define MT9M001_ROW_SKIP 12 | |
48 | ||
f523dd0d | 49 | static const struct soc_camera_data_format mt9m001_colour_formats[] = { |
bb55de3b GL |
50 | /* Order important: first natively supported, |
51 | * second supported with a GPIO extender */ | |
f523dd0d | 52 | { |
bb55de3b GL |
53 | .name = "Bayer (sRGB) 10 bit", |
54 | .depth = 10, | |
55 | .fourcc = V4L2_PIX_FMT_SBGGR16, | |
56 | .colorspace = V4L2_COLORSPACE_SRGB, | |
57 | }, { | |
58 | .name = "Bayer (sRGB) 8 bit", | |
59 | .depth = 8, | |
f523dd0d GL |
60 | .fourcc = V4L2_PIX_FMT_SBGGR8, |
61 | .colorspace = V4L2_COLORSPACE_SRGB, | |
62 | } | |
63 | }; | |
64 | ||
65 | static const struct soc_camera_data_format mt9m001_monochrome_formats[] = { | |
bb55de3b | 66 | /* Order important - see above */ |
f523dd0d GL |
67 | { |
68 | .name = "Monochrome 10 bit", | |
69 | .depth = 10, | |
70 | .fourcc = V4L2_PIX_FMT_Y16, | |
71 | }, { | |
72 | .name = "Monochrome 8 bit", | |
73 | .depth = 8, | |
74 | .fourcc = V4L2_PIX_FMT_GREY, | |
75 | }, | |
76 | }; | |
77 | ||
78 | struct mt9m001 { | |
979ea1dd | 79 | struct v4l2_subdev subdev; |
6a6c8786 GL |
80 | struct v4l2_rect rect; /* Sensor window */ |
81 | __u32 fourcc; | |
f523dd0d | 82 | int model; /* V4L2_IDENT_MT9M001* codes from v4l2-chip-ident.h */ |
f523dd0d | 83 | unsigned char autoexposure; |
f523dd0d GL |
84 | }; |
85 | ||
979ea1dd GL |
86 | static struct mt9m001 *to_mt9m001(const struct i2c_client *client) |
87 | { | |
88 | return container_of(i2c_get_clientdata(client), struct mt9m001, subdev); | |
89 | } | |
90 | ||
9538e1c2 | 91 | static int reg_read(struct i2c_client *client, const u8 reg) |
f523dd0d | 92 | { |
f523dd0d GL |
93 | s32 data = i2c_smbus_read_word_data(client, reg); |
94 | return data < 0 ? data : swab16(data); | |
95 | } | |
96 | ||
9538e1c2 | 97 | static int reg_write(struct i2c_client *client, const u8 reg, |
f523dd0d GL |
98 | const u16 data) |
99 | { | |
9538e1c2 | 100 | return i2c_smbus_write_word_data(client, reg, swab16(data)); |
f523dd0d GL |
101 | } |
102 | ||
9538e1c2 | 103 | static int reg_set(struct i2c_client *client, const u8 reg, |
f523dd0d GL |
104 | const u16 data) |
105 | { | |
106 | int ret; | |
107 | ||
9538e1c2 | 108 | ret = reg_read(client, reg); |
f523dd0d GL |
109 | if (ret < 0) |
110 | return ret; | |
9538e1c2 | 111 | return reg_write(client, reg, ret | data); |
f523dd0d GL |
112 | } |
113 | ||
9538e1c2 | 114 | static int reg_clear(struct i2c_client *client, const u8 reg, |
f523dd0d GL |
115 | const u16 data) |
116 | { | |
117 | int ret; | |
118 | ||
9538e1c2 | 119 | ret = reg_read(client, reg); |
f523dd0d GL |
120 | if (ret < 0) |
121 | return ret; | |
9538e1c2 | 122 | return reg_write(client, reg, ret & ~data); |
f523dd0d GL |
123 | } |
124 | ||
a4c56fd8 | 125 | static int mt9m001_init(struct i2c_client *client) |
f523dd0d GL |
126 | { |
127 | int ret; | |
128 | ||
85f8be68 | 129 | dev_dbg(&client->dev, "%s\n", __func__); |
f523dd0d | 130 | |
979ea1dd GL |
131 | /* |
132 | * We don't know, whether platform provides reset, | |
133 | * issue a soft reset too | |
134 | */ | |
135 | ret = reg_write(client, MT9M001_RESET, 1); | |
136 | if (!ret) | |
137 | ret = reg_write(client, MT9M001_RESET, 0); | |
81034663 | 138 | |
11211641 GL |
139 | /* Disable chip, synchronous option update */ |
140 | if (!ret) | |
9538e1c2 | 141 | ret = reg_write(client, MT9M001_OUTPUT_CONTROL, 0); |
f523dd0d | 142 | |
11211641 | 143 | return ret; |
f523dd0d GL |
144 | } |
145 | ||
979ea1dd | 146 | static int mt9m001_s_stream(struct v4l2_subdev *sd, int enable) |
f523dd0d | 147 | { |
979ea1dd | 148 | struct i2c_client *client = sd->priv; |
9538e1c2 | 149 | |
979ea1dd GL |
150 | /* Switch to master "normal" mode or stop sensor readout */ |
151 | if (reg_write(client, MT9M001_OUTPUT_CONTROL, enable ? 2 : 0) < 0) | |
f523dd0d GL |
152 | return -EIO; |
153 | return 0; | |
154 | } | |
155 | ||
ad5f2e85 GL |
156 | static int mt9m001_set_bus_param(struct soc_camera_device *icd, |
157 | unsigned long flags) | |
f523dd0d | 158 | { |
40e2e092 | 159 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
36034dc3 | 160 | unsigned long width_flag = flags & SOCAM_DATAWIDTH_MASK; |
f523dd0d | 161 | |
36034dc3 SH |
162 | /* Only one width bit may be set */ |
163 | if (!is_power_of_2(width_flag)) | |
164 | return -EINVAL; | |
f523dd0d | 165 | |
36034dc3 SH |
166 | if (icl->set_bus_param) |
167 | return icl->set_bus_param(icl, width_flag); | |
f523dd0d | 168 | |
36034dc3 SH |
169 | /* |
170 | * Without board specific bus width settings we only support the | |
171 | * sensors native bus width | |
172 | */ | |
173 | if (width_flag == SOCAM_DATAWIDTH_10) | |
174 | return 0; | |
f523dd0d | 175 | |
36034dc3 | 176 | return -EINVAL; |
ad5f2e85 GL |
177 | } |
178 | ||
179 | static unsigned long mt9m001_query_bus_param(struct soc_camera_device *icd) | |
180 | { | |
40e2e092 | 181 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
bd73b36f | 182 | /* MT9M001 has all capture_format parameters fixed */ |
e951cbf2 | 183 | unsigned long flags = SOCAM_PCLK_SAMPLE_FALLING | |
bd73b36f | 184 | SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_HIGH | |
2d9329f3 | 185 | SOCAM_DATA_ACTIVE_HIGH | SOCAM_MASTER; |
ad5f2e85 | 186 | |
36034dc3 SH |
187 | if (icl->query_bus_param) |
188 | flags |= icl->query_bus_param(icl) & SOCAM_DATAWIDTH_MASK; | |
189 | else | |
190 | flags |= SOCAM_DATAWIDTH_10; | |
ad5f2e85 | 191 | |
bd73b36f | 192 | return soc_camera_apply_sensor_flags(icl, flags); |
ad5f2e85 GL |
193 | } |
194 | ||
08590b96 | 195 | static int mt9m001_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) |
ad5f2e85 | 196 | { |
08590b96 | 197 | struct i2c_client *client = sd->priv; |
979ea1dd | 198 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
6a6c8786 | 199 | struct v4l2_rect rect = a->c; |
08590b96 | 200 | struct soc_camera_device *icd = client->dev.platform_data; |
ad5f2e85 GL |
201 | int ret; |
202 | const u16 hblank = 9, vblank = 25; | |
203 | ||
6a6c8786 GL |
204 | if (mt9m001->fourcc == V4L2_PIX_FMT_SBGGR8 || |
205 | mt9m001->fourcc == V4L2_PIX_FMT_SBGGR16) | |
206 | /* | |
207 | * Bayer format - even number of rows for simplicity, | |
208 | * but let the user play with the top row. | |
209 | */ | |
210 | rect.height = ALIGN(rect.height, 2); | |
211 | ||
212 | /* Datasheet requirement: see register description */ | |
213 | rect.width = ALIGN(rect.width, 2); | |
214 | rect.left = ALIGN(rect.left, 2); | |
215 | ||
216 | soc_camera_limit_side(&rect.left, &rect.width, | |
217 | MT9M001_COLUMN_SKIP, MT9M001_MIN_WIDTH, MT9M001_MAX_WIDTH); | |
218 | ||
219 | soc_camera_limit_side(&rect.top, &rect.height, | |
220 | MT9M001_ROW_SKIP, MT9M001_MIN_HEIGHT, MT9M001_MAX_HEIGHT); | |
221 | ||
f523dd0d | 222 | /* Blanking and start values - default... */ |
9538e1c2 | 223 | ret = reg_write(client, MT9M001_HORIZONTAL_BLANKING, hblank); |
11211641 | 224 | if (!ret) |
9538e1c2 | 225 | ret = reg_write(client, MT9M001_VERTICAL_BLANKING, vblank); |
f523dd0d GL |
226 | |
227 | /* The caller provides a supported format, as verified per | |
d8fac217 | 228 | * call to icd->try_fmt() */ |
11211641 | 229 | if (!ret) |
6a6c8786 | 230 | ret = reg_write(client, MT9M001_COLUMN_START, rect.left); |
11211641 | 231 | if (!ret) |
6a6c8786 | 232 | ret = reg_write(client, MT9M001_ROW_START, rect.top); |
11211641 | 233 | if (!ret) |
6a6c8786 | 234 | ret = reg_write(client, MT9M001_WINDOW_WIDTH, rect.width - 1); |
11211641 | 235 | if (!ret) |
9538e1c2 | 236 | ret = reg_write(client, MT9M001_WINDOW_HEIGHT, |
6a6c8786 | 237 | rect.height + icd->y_skip_top - 1); |
11211641 | 238 | if (!ret && mt9m001->autoexposure) { |
9538e1c2 | 239 | ret = reg_write(client, MT9M001_SHUTTER_WIDTH, |
6a6c8786 | 240 | rect.height + icd->y_skip_top + vblank); |
11211641 | 241 | if (!ret) { |
f523dd0d GL |
242 | const struct v4l2_queryctrl *qctrl = |
243 | soc_camera_find_qctrl(icd->ops, | |
244 | V4L2_CID_EXPOSURE); | |
6a6c8786 | 245 | icd->exposure = (524 + (rect.height + icd->y_skip_top + |
f523dd0d GL |
246 | vblank - 1) * |
247 | (qctrl->maximum - qctrl->minimum)) / | |
248 | 1048 + qctrl->minimum; | |
249 | } | |
250 | } | |
251 | ||
6a6c8786 GL |
252 | if (!ret) |
253 | mt9m001->rect = rect; | |
254 | ||
11211641 | 255 | return ret; |
f523dd0d GL |
256 | } |
257 | ||
6a6c8786 GL |
258 | static int mt9m001_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) |
259 | { | |
260 | struct i2c_client *client = sd->priv; | |
261 | struct mt9m001 *mt9m001 = to_mt9m001(client); | |
262 | ||
263 | a->c = mt9m001->rect; | |
264 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
265 | ||
266 | return 0; | |
267 | } | |
268 | ||
269 | static int mt9m001_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a) | |
270 | { | |
271 | a->bounds.left = MT9M001_COLUMN_SKIP; | |
272 | a->bounds.top = MT9M001_ROW_SKIP; | |
273 | a->bounds.width = MT9M001_MAX_WIDTH; | |
274 | a->bounds.height = MT9M001_MAX_HEIGHT; | |
275 | a->defrect = a->bounds; | |
276 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
277 | a->pixelaspect.numerator = 1; | |
278 | a->pixelaspect.denominator = 1; | |
279 | ||
280 | return 0; | |
281 | } | |
282 | ||
283 | static int mt9m001_g_fmt(struct v4l2_subdev *sd, struct v4l2_format *f) | |
284 | { | |
285 | struct i2c_client *client = sd->priv; | |
286 | struct mt9m001 *mt9m001 = to_mt9m001(client); | |
287 | struct v4l2_pix_format *pix = &f->fmt.pix; | |
288 | ||
289 | pix->width = mt9m001->rect.width; | |
290 | pix->height = mt9m001->rect.height; | |
291 | pix->pixelformat = mt9m001->fourcc; | |
292 | pix->field = V4L2_FIELD_NONE; | |
293 | pix->colorspace = V4L2_COLORSPACE_SRGB; | |
294 | ||
295 | return 0; | |
296 | } | |
297 | ||
979ea1dd | 298 | static int mt9m001_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *f) |
09e231b3 | 299 | { |
979ea1dd | 300 | struct i2c_client *client = sd->priv; |
6a6c8786 GL |
301 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
302 | struct v4l2_pix_format *pix = &f->fmt.pix; | |
08590b96 GL |
303 | struct v4l2_crop a = { |
304 | .c = { | |
6a6c8786 GL |
305 | .left = mt9m001->rect.left, |
306 | .top = mt9m001->rect.top, | |
307 | .width = pix->width, | |
308 | .height = pix->height, | |
08590b96 | 309 | }, |
09e231b3 | 310 | }; |
6a6c8786 | 311 | int ret; |
09e231b3 GL |
312 | |
313 | /* No support for scaling so far, just crop. TODO: use skipping */ | |
6a6c8786 GL |
314 | ret = mt9m001_s_crop(sd, &a); |
315 | if (!ret) { | |
316 | pix->width = mt9m001->rect.width; | |
317 | pix->height = mt9m001->rect.height; | |
318 | mt9m001->fourcc = pix->pixelformat; | |
319 | } | |
320 | ||
321 | return ret; | |
09e231b3 GL |
322 | } |
323 | ||
979ea1dd | 324 | static int mt9m001_try_fmt(struct v4l2_subdev *sd, struct v4l2_format *f) |
f523dd0d | 325 | { |
979ea1dd GL |
326 | struct i2c_client *client = sd->priv; |
327 | struct soc_camera_device *icd = client->dev.platform_data; | |
64f5905e GL |
328 | struct v4l2_pix_format *pix = &f->fmt.pix; |
329 | ||
6a6c8786 GL |
330 | v4l_bound_align_image(&pix->width, MT9M001_MIN_WIDTH, |
331 | MT9M001_MAX_WIDTH, 1, | |
332 | &pix->height, MT9M001_MIN_HEIGHT + icd->y_skip_top, | |
333 | MT9M001_MAX_HEIGHT + icd->y_skip_top, 0, 0); | |
334 | ||
335 | if (pix->pixelformat == V4L2_PIX_FMT_SBGGR8 || | |
336 | pix->pixelformat == V4L2_PIX_FMT_SBGGR16) | |
337 | pix->height = ALIGN(pix->height - 1, 2); | |
f523dd0d GL |
338 | |
339 | return 0; | |
340 | } | |
341 | ||
979ea1dd GL |
342 | static int mt9m001_g_chip_ident(struct v4l2_subdev *sd, |
343 | struct v4l2_dbg_chip_ident *id) | |
f523dd0d | 344 | { |
979ea1dd GL |
345 | struct i2c_client *client = sd->priv; |
346 | struct mt9m001 *mt9m001 = to_mt9m001(client); | |
f523dd0d | 347 | |
aecde8b5 | 348 | if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR) |
f523dd0d GL |
349 | return -EINVAL; |
350 | ||
40e2e092 | 351 | if (id->match.addr != client->addr) |
f523dd0d GL |
352 | return -ENODEV; |
353 | ||
354 | id->ident = mt9m001->model; | |
355 | id->revision = 0; | |
356 | ||
357 | return 0; | |
358 | } | |
359 | ||
360 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
979ea1dd GL |
361 | static int mt9m001_g_register(struct v4l2_subdev *sd, |
362 | struct v4l2_dbg_register *reg) | |
f523dd0d | 363 | { |
979ea1dd | 364 | struct i2c_client *client = sd->priv; |
f523dd0d | 365 | |
aecde8b5 | 366 | if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) |
f523dd0d GL |
367 | return -EINVAL; |
368 | ||
9538e1c2 | 369 | if (reg->match.addr != client->addr) |
f523dd0d GL |
370 | return -ENODEV; |
371 | ||
aecde8b5 | 372 | reg->size = 2; |
9538e1c2 | 373 | reg->val = reg_read(client, reg->reg); |
f523dd0d GL |
374 | |
375 | if (reg->val > 0xffff) | |
376 | return -EIO; | |
377 | ||
378 | return 0; | |
379 | } | |
380 | ||
979ea1dd GL |
381 | static int mt9m001_s_register(struct v4l2_subdev *sd, |
382 | struct v4l2_dbg_register *reg) | |
f523dd0d | 383 | { |
979ea1dd | 384 | struct i2c_client *client = sd->priv; |
f523dd0d | 385 | |
aecde8b5 | 386 | if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) |
f523dd0d GL |
387 | return -EINVAL; |
388 | ||
9538e1c2 | 389 | if (reg->match.addr != client->addr) |
f523dd0d GL |
390 | return -ENODEV; |
391 | ||
9538e1c2 | 392 | if (reg_write(client, reg->reg, reg->val) < 0) |
f523dd0d GL |
393 | return -EIO; |
394 | ||
395 | return 0; | |
396 | } | |
397 | #endif | |
398 | ||
4407a463 | 399 | static const struct v4l2_queryctrl mt9m001_controls[] = { |
f523dd0d GL |
400 | { |
401 | .id = V4L2_CID_VFLIP, | |
402 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
403 | .name = "Flip Vertically", | |
404 | .minimum = 0, | |
405 | .maximum = 1, | |
406 | .step = 1, | |
407 | .default_value = 0, | |
408 | }, { | |
409 | .id = V4L2_CID_GAIN, | |
410 | .type = V4L2_CTRL_TYPE_INTEGER, | |
411 | .name = "Gain", | |
412 | .minimum = 0, | |
413 | .maximum = 127, | |
414 | .step = 1, | |
415 | .default_value = 64, | |
416 | .flags = V4L2_CTRL_FLAG_SLIDER, | |
417 | }, { | |
418 | .id = V4L2_CID_EXPOSURE, | |
419 | .type = V4L2_CTRL_TYPE_INTEGER, | |
420 | .name = "Exposure", | |
421 | .minimum = 1, | |
422 | .maximum = 255, | |
423 | .step = 1, | |
424 | .default_value = 255, | |
425 | .flags = V4L2_CTRL_FLAG_SLIDER, | |
426 | }, { | |
427 | .id = V4L2_CID_EXPOSURE_AUTO, | |
428 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
429 | .name = "Automatic Exposure", | |
430 | .minimum = 0, | |
431 | .maximum = 1, | |
432 | .step = 1, | |
433 | .default_value = 1, | |
434 | } | |
435 | }; | |
436 | ||
f523dd0d | 437 | static struct soc_camera_ops mt9m001_ops = { |
ad5f2e85 GL |
438 | .set_bus_param = mt9m001_set_bus_param, |
439 | .query_bus_param = mt9m001_query_bus_param, | |
f523dd0d GL |
440 | .controls = mt9m001_controls, |
441 | .num_controls = ARRAY_SIZE(mt9m001_controls), | |
f523dd0d GL |
442 | }; |
443 | ||
979ea1dd | 444 | static int mt9m001_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
f523dd0d | 445 | { |
979ea1dd GL |
446 | struct i2c_client *client = sd->priv; |
447 | struct mt9m001 *mt9m001 = to_mt9m001(client); | |
f523dd0d GL |
448 | int data; |
449 | ||
450 | switch (ctrl->id) { | |
451 | case V4L2_CID_VFLIP: | |
9538e1c2 | 452 | data = reg_read(client, MT9M001_READ_OPTIONS2); |
f523dd0d GL |
453 | if (data < 0) |
454 | return -EIO; | |
455 | ctrl->value = !!(data & 0x8000); | |
456 | break; | |
457 | case V4L2_CID_EXPOSURE_AUTO: | |
458 | ctrl->value = mt9m001->autoexposure; | |
459 | break; | |
460 | } | |
461 | return 0; | |
462 | } | |
463 | ||
979ea1dd | 464 | static int mt9m001_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
f523dd0d | 465 | { |
979ea1dd GL |
466 | struct i2c_client *client = sd->priv; |
467 | struct mt9m001 *mt9m001 = to_mt9m001(client); | |
468 | struct soc_camera_device *icd = client->dev.platform_data; | |
f523dd0d GL |
469 | const struct v4l2_queryctrl *qctrl; |
470 | int data; | |
471 | ||
472 | qctrl = soc_camera_find_qctrl(&mt9m001_ops, ctrl->id); | |
473 | ||
474 | if (!qctrl) | |
475 | return -EINVAL; | |
476 | ||
477 | switch (ctrl->id) { | |
478 | case V4L2_CID_VFLIP: | |
479 | if (ctrl->value) | |
9538e1c2 | 480 | data = reg_set(client, MT9M001_READ_OPTIONS2, 0x8000); |
f523dd0d | 481 | else |
9538e1c2 | 482 | data = reg_clear(client, MT9M001_READ_OPTIONS2, 0x8000); |
f523dd0d GL |
483 | if (data < 0) |
484 | return -EIO; | |
485 | break; | |
486 | case V4L2_CID_GAIN: | |
487 | if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum) | |
488 | return -EINVAL; | |
489 | /* See Datasheet Table 7, Gain settings. */ | |
490 | if (ctrl->value <= qctrl->default_value) { | |
491 | /* Pack it into 0..1 step 0.125, register values 0..8 */ | |
492 | unsigned long range = qctrl->default_value - qctrl->minimum; | |
493 | data = ((ctrl->value - qctrl->minimum) * 8 + range / 2) / range; | |
494 | ||
85f8be68 | 495 | dev_dbg(&client->dev, "Setting gain %d\n", data); |
9538e1c2 | 496 | data = reg_write(client, MT9M001_GLOBAL_GAIN, data); |
f523dd0d GL |
497 | if (data < 0) |
498 | return -EIO; | |
499 | } else { | |
500 | /* Pack it into 1.125..15 variable step, register values 9..67 */ | |
501 | /* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */ | |
502 | unsigned long range = qctrl->maximum - qctrl->default_value - 1; | |
503 | unsigned long gain = ((ctrl->value - qctrl->default_value - 1) * | |
504 | 111 + range / 2) / range + 9; | |
505 | ||
506 | if (gain <= 32) | |
507 | data = gain; | |
508 | else if (gain <= 64) | |
509 | data = ((gain - 32) * 16 + 16) / 32 + 80; | |
510 | else | |
511 | data = ((gain - 64) * 7 + 28) / 56 + 96; | |
512 | ||
85f8be68 | 513 | dev_dbg(&client->dev, "Setting gain from %d to %d\n", |
9538e1c2 GL |
514 | reg_read(client, MT9M001_GLOBAL_GAIN), data); |
515 | data = reg_write(client, MT9M001_GLOBAL_GAIN, data); | |
f523dd0d GL |
516 | if (data < 0) |
517 | return -EIO; | |
518 | } | |
519 | ||
520 | /* Success */ | |
521 | icd->gain = ctrl->value; | |
522 | break; | |
523 | case V4L2_CID_EXPOSURE: | |
524 | /* mt9m001 has maximum == default */ | |
525 | if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum) | |
526 | return -EINVAL; | |
527 | else { | |
528 | unsigned long range = qctrl->maximum - qctrl->minimum; | |
529 | unsigned long shutter = ((ctrl->value - qctrl->minimum) * 1048 + | |
530 | range / 2) / range + 1; | |
531 | ||
85f8be68 GL |
532 | dev_dbg(&client->dev, |
533 | "Setting shutter width from %d to %lu\n", | |
534 | reg_read(client, MT9M001_SHUTTER_WIDTH), | |
535 | shutter); | |
9538e1c2 | 536 | if (reg_write(client, MT9M001_SHUTTER_WIDTH, shutter) < 0) |
f523dd0d GL |
537 | return -EIO; |
538 | icd->exposure = ctrl->value; | |
539 | mt9m001->autoexposure = 0; | |
540 | } | |
541 | break; | |
542 | case V4L2_CID_EXPOSURE_AUTO: | |
543 | if (ctrl->value) { | |
544 | const u16 vblank = 25; | |
a0705b07 | 545 | if (reg_write(client, MT9M001_SHUTTER_WIDTH, |
6a6c8786 | 546 | mt9m001->rect.height + |
f523dd0d GL |
547 | icd->y_skip_top + vblank) < 0) |
548 | return -EIO; | |
549 | qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE); | |
6a6c8786 | 550 | icd->exposure = (524 + (mt9m001->rect.height + |
a0705b07 | 551 | icd->y_skip_top + vblank - 1) * |
f523dd0d GL |
552 | (qctrl->maximum - qctrl->minimum)) / |
553 | 1048 + qctrl->minimum; | |
554 | mt9m001->autoexposure = 1; | |
555 | } else | |
556 | mt9m001->autoexposure = 0; | |
557 | break; | |
558 | } | |
559 | return 0; | |
560 | } | |
561 | ||
562 | /* Interface active, can use i2c. If it fails, it can indeed mean, that | |
563 | * this wasn't our capture interface, so, we wait for the right one */ | |
40e2e092 GL |
564 | static int mt9m001_video_probe(struct soc_camera_device *icd, |
565 | struct i2c_client *client) | |
f523dd0d | 566 | { |
979ea1dd | 567 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
40e2e092 | 568 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
f523dd0d | 569 | s32 data; |
36034dc3 | 570 | unsigned long flags; |
a4c56fd8 | 571 | int ret; |
f523dd0d GL |
572 | |
573 | /* We must have a parent by now. And it cannot be a wrong one. | |
574 | * So this entire test is completely redundant. */ | |
575 | if (!icd->dev.parent || | |
576 | to_soc_camera_host(icd->dev.parent)->nr != icd->iface) | |
577 | return -ENODEV; | |
578 | ||
579 | /* Enable the chip */ | |
9538e1c2 | 580 | data = reg_write(client, MT9M001_CHIP_ENABLE, 1); |
85f8be68 | 581 | dev_dbg(&client->dev, "write: %d\n", data); |
f523dd0d GL |
582 | |
583 | /* Read out the chip version register */ | |
9538e1c2 | 584 | data = reg_read(client, MT9M001_CHIP_VERSION); |
f523dd0d GL |
585 | |
586 | /* must be 0x8411 or 0x8421 for colour sensor and 8431 for bw */ | |
587 | switch (data) { | |
588 | case 0x8411: | |
589 | case 0x8421: | |
590 | mt9m001->model = V4L2_IDENT_MT9M001C12ST; | |
26f1b942 | 591 | icd->formats = mt9m001_colour_formats; |
f523dd0d GL |
592 | break; |
593 | case 0x8431: | |
594 | mt9m001->model = V4L2_IDENT_MT9M001C12STM; | |
26f1b942 | 595 | icd->formats = mt9m001_monochrome_formats; |
f523dd0d GL |
596 | break; |
597 | default: | |
85f8be68 | 598 | dev_err(&client->dev, |
f523dd0d | 599 | "No MT9M001 chip detected, register read %x\n", data); |
40e2e092 | 600 | return -ENODEV; |
f523dd0d GL |
601 | } |
602 | ||
36034dc3 SH |
603 | icd->num_formats = 0; |
604 | ||
605 | /* | |
606 | * This is a 10bit sensor, so by default we only allow 10bit. | |
607 | * The platform may support different bus widths due to | |
608 | * different routing of the data lines. | |
609 | */ | |
610 | if (icl->query_bus_param) | |
611 | flags = icl->query_bus_param(icl); | |
612 | else | |
613 | flags = SOCAM_DATAWIDTH_10; | |
614 | ||
615 | if (flags & SOCAM_DATAWIDTH_10) | |
616 | icd->num_formats++; | |
617 | else | |
618 | icd->formats++; | |
619 | ||
620 | if (flags & SOCAM_DATAWIDTH_8) | |
621 | icd->num_formats++; | |
622 | ||
6a6c8786 GL |
623 | mt9m001->fourcc = icd->formats->fourcc; |
624 | ||
85f8be68 | 625 | dev_info(&client->dev, "Detected a MT9M001 chip ID %x (%s)\n", data, |
f523dd0d GL |
626 | data == 0x8431 ? "C12STM" : "C12ST"); |
627 | ||
a4c56fd8 GL |
628 | ret = mt9m001_init(client); |
629 | if (ret < 0) | |
630 | dev_err(&client->dev, "Failed to initialise the camera\n"); | |
631 | ||
632 | return ret; | |
f523dd0d GL |
633 | } |
634 | ||
635 | static void mt9m001_video_remove(struct soc_camera_device *icd) | |
636 | { | |
40e2e092 | 637 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
f523dd0d | 638 | |
6a6c8786 | 639 | dev_dbg(&icd->dev, "Video removed: %p, %p\n", |
a85bdace | 640 | icd->dev.parent, icd->vdev); |
594bb46d GL |
641 | if (icl->free_bus) |
642 | icl->free_bus(icl); | |
f523dd0d GL |
643 | } |
644 | ||
979ea1dd GL |
645 | static struct v4l2_subdev_core_ops mt9m001_subdev_core_ops = { |
646 | .g_ctrl = mt9m001_g_ctrl, | |
647 | .s_ctrl = mt9m001_s_ctrl, | |
648 | .g_chip_ident = mt9m001_g_chip_ident, | |
649 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
650 | .g_register = mt9m001_g_register, | |
651 | .s_register = mt9m001_s_register, | |
652 | #endif | |
653 | }; | |
654 | ||
655 | static struct v4l2_subdev_video_ops mt9m001_subdev_video_ops = { | |
656 | .s_stream = mt9m001_s_stream, | |
657 | .s_fmt = mt9m001_s_fmt, | |
6a6c8786 | 658 | .g_fmt = mt9m001_g_fmt, |
979ea1dd | 659 | .try_fmt = mt9m001_try_fmt, |
08590b96 | 660 | .s_crop = mt9m001_s_crop, |
6a6c8786 GL |
661 | .g_crop = mt9m001_g_crop, |
662 | .cropcap = mt9m001_cropcap, | |
979ea1dd GL |
663 | }; |
664 | ||
665 | static struct v4l2_subdev_ops mt9m001_subdev_ops = { | |
666 | .core = &mt9m001_subdev_core_ops, | |
667 | .video = &mt9m001_subdev_video_ops, | |
668 | }; | |
669 | ||
d2653e92 JD |
670 | static int mt9m001_probe(struct i2c_client *client, |
671 | const struct i2c_device_id *did) | |
f523dd0d GL |
672 | { |
673 | struct mt9m001 *mt9m001; | |
40e2e092 | 674 | struct soc_camera_device *icd = client->dev.platform_data; |
f523dd0d | 675 | struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); |
40e2e092 | 676 | struct soc_camera_link *icl; |
f523dd0d GL |
677 | int ret; |
678 | ||
40e2e092 GL |
679 | if (!icd) { |
680 | dev_err(&client->dev, "MT9M001: missing soc-camera data!\n"); | |
681 | return -EINVAL; | |
682 | } | |
683 | ||
684 | icl = to_soc_camera_link(icd); | |
f523dd0d GL |
685 | if (!icl) { |
686 | dev_err(&client->dev, "MT9M001 driver needs platform data\n"); | |
687 | return -EINVAL; | |
688 | } | |
689 | ||
690 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) { | |
691 | dev_warn(&adapter->dev, | |
692 | "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n"); | |
693 | return -EIO; | |
694 | } | |
695 | ||
696 | mt9m001 = kzalloc(sizeof(struct mt9m001), GFP_KERNEL); | |
697 | if (!mt9m001) | |
698 | return -ENOMEM; | |
699 | ||
979ea1dd | 700 | v4l2_i2c_subdev_init(&mt9m001->subdev, client, &mt9m001_subdev_ops); |
f523dd0d GL |
701 | |
702 | /* Second stage probe - when a capture adapter is there */ | |
a0705b07 | 703 | icd->ops = &mt9m001_ops; |
a0705b07 | 704 | icd->y_skip_top = 1; |
6a6c8786 GL |
705 | |
706 | mt9m001->rect.left = MT9M001_COLUMN_SKIP; | |
707 | mt9m001->rect.top = MT9M001_ROW_SKIP; | |
708 | mt9m001->rect.width = MT9M001_MAX_WIDTH; | |
709 | mt9m001->rect.height = MT9M001_MAX_HEIGHT; | |
710 | ||
f523dd0d GL |
711 | /* Simulated autoexposure. If enabled, we calculate shutter width |
712 | * ourselves in the driver based on vertical blanking and frame width */ | |
713 | mt9m001->autoexposure = 1; | |
714 | ||
40e2e092 GL |
715 | ret = mt9m001_video_probe(icd, client); |
716 | if (ret) { | |
717 | icd->ops = NULL; | |
718 | i2c_set_clientdata(client, NULL); | |
719 | kfree(mt9m001); | |
720 | } | |
f523dd0d | 721 | |
f523dd0d GL |
722 | return ret; |
723 | } | |
724 | ||
725 | static int mt9m001_remove(struct i2c_client *client) | |
726 | { | |
979ea1dd | 727 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
40e2e092 | 728 | struct soc_camera_device *icd = client->dev.platform_data; |
f523dd0d | 729 | |
40e2e092 GL |
730 | icd->ops = NULL; |
731 | mt9m001_video_remove(icd); | |
732 | i2c_set_clientdata(client, NULL); | |
733 | client->driver = NULL; | |
f523dd0d GL |
734 | kfree(mt9m001); |
735 | ||
736 | return 0; | |
737 | } | |
738 | ||
3760f736 JD |
739 | static const struct i2c_device_id mt9m001_id[] = { |
740 | { "mt9m001", 0 }, | |
741 | { } | |
742 | }; | |
743 | MODULE_DEVICE_TABLE(i2c, mt9m001_id); | |
744 | ||
f523dd0d GL |
745 | static struct i2c_driver mt9m001_i2c_driver = { |
746 | .driver = { | |
747 | .name = "mt9m001", | |
748 | }, | |
749 | .probe = mt9m001_probe, | |
750 | .remove = mt9m001_remove, | |
3760f736 | 751 | .id_table = mt9m001_id, |
f523dd0d GL |
752 | }; |
753 | ||
754 | static int __init mt9m001_mod_init(void) | |
755 | { | |
756 | return i2c_add_driver(&mt9m001_i2c_driver); | |
757 | } | |
758 | ||
759 | static void __exit mt9m001_mod_exit(void) | |
760 | { | |
761 | i2c_del_driver(&mt9m001_i2c_driver); | |
762 | } | |
763 | ||
764 | module_init(mt9m001_mod_init); | |
765 | module_exit(mt9m001_mod_exit); | |
766 | ||
767 | MODULE_DESCRIPTION("Micron MT9M001 Camera driver"); | |
768 | MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>"); | |
769 | MODULE_LICENSE("GPL"); |