Commit | Line | Data |
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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 | ||
125 | static int mt9m001_init(struct soc_camera_device *icd) | |
126 | { | |
40e2e092 | 127 | struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd)); |
f523dd0d GL |
128 | int ret; |
129 | ||
85f8be68 | 130 | dev_dbg(&client->dev, "%s\n", __func__); |
f523dd0d | 131 | |
979ea1dd GL |
132 | /* |
133 | * We don't know, whether platform provides reset, | |
134 | * issue a soft reset too | |
135 | */ | |
136 | ret = reg_write(client, MT9M001_RESET, 1); | |
137 | if (!ret) | |
138 | ret = reg_write(client, MT9M001_RESET, 0); | |
81034663 | 139 | |
11211641 GL |
140 | /* Disable chip, synchronous option update */ |
141 | if (!ret) | |
9538e1c2 | 142 | ret = reg_write(client, MT9M001_OUTPUT_CONTROL, 0); |
f523dd0d | 143 | |
11211641 | 144 | return ret; |
f523dd0d GL |
145 | } |
146 | ||
147 | static int mt9m001_release(struct soc_camera_device *icd) | |
148 | { | |
40e2e092 | 149 | struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd)); |
81034663 | 150 | |
f523dd0d | 151 | /* Disable the chip */ |
9538e1c2 | 152 | reg_write(client, MT9M001_OUTPUT_CONTROL, 0); |
81034663 | 153 | |
f523dd0d GL |
154 | return 0; |
155 | } | |
156 | ||
979ea1dd | 157 | static int mt9m001_s_stream(struct v4l2_subdev *sd, int enable) |
f523dd0d | 158 | { |
979ea1dd | 159 | struct i2c_client *client = sd->priv; |
9538e1c2 | 160 | |
979ea1dd GL |
161 | /* Switch to master "normal" mode or stop sensor readout */ |
162 | if (reg_write(client, MT9M001_OUTPUT_CONTROL, enable ? 2 : 0) < 0) | |
f523dd0d GL |
163 | return -EIO; |
164 | return 0; | |
165 | } | |
166 | ||
ad5f2e85 GL |
167 | static int mt9m001_set_bus_param(struct soc_camera_device *icd, |
168 | unsigned long flags) | |
f523dd0d | 169 | { |
40e2e092 | 170 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
36034dc3 | 171 | unsigned long width_flag = flags & SOCAM_DATAWIDTH_MASK; |
f523dd0d | 172 | |
36034dc3 SH |
173 | /* Only one width bit may be set */ |
174 | if (!is_power_of_2(width_flag)) | |
175 | return -EINVAL; | |
f523dd0d | 176 | |
36034dc3 SH |
177 | if (icl->set_bus_param) |
178 | return icl->set_bus_param(icl, width_flag); | |
f523dd0d | 179 | |
36034dc3 SH |
180 | /* |
181 | * Without board specific bus width settings we only support the | |
182 | * sensors native bus width | |
183 | */ | |
184 | if (width_flag == SOCAM_DATAWIDTH_10) | |
185 | return 0; | |
f523dd0d | 186 | |
36034dc3 | 187 | return -EINVAL; |
ad5f2e85 GL |
188 | } |
189 | ||
190 | static unsigned long mt9m001_query_bus_param(struct soc_camera_device *icd) | |
191 | { | |
40e2e092 | 192 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
bd73b36f | 193 | /* MT9M001 has all capture_format parameters fixed */ |
e951cbf2 | 194 | unsigned long flags = SOCAM_PCLK_SAMPLE_FALLING | |
bd73b36f | 195 | SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_HIGH | |
2d9329f3 | 196 | SOCAM_DATA_ACTIVE_HIGH | SOCAM_MASTER; |
ad5f2e85 | 197 | |
36034dc3 SH |
198 | if (icl->query_bus_param) |
199 | flags |= icl->query_bus_param(icl) & SOCAM_DATAWIDTH_MASK; | |
200 | else | |
201 | flags |= SOCAM_DATAWIDTH_10; | |
ad5f2e85 | 202 | |
bd73b36f | 203 | return soc_camera_apply_sensor_flags(icl, flags); |
ad5f2e85 GL |
204 | } |
205 | ||
08590b96 | 206 | static int mt9m001_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) |
ad5f2e85 | 207 | { |
08590b96 | 208 | struct i2c_client *client = sd->priv; |
979ea1dd | 209 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
6a6c8786 | 210 | struct v4l2_rect rect = a->c; |
08590b96 | 211 | struct soc_camera_device *icd = client->dev.platform_data; |
ad5f2e85 GL |
212 | int ret; |
213 | const u16 hblank = 9, vblank = 25; | |
214 | ||
6a6c8786 GL |
215 | if (mt9m001->fourcc == V4L2_PIX_FMT_SBGGR8 || |
216 | mt9m001->fourcc == V4L2_PIX_FMT_SBGGR16) | |
217 | /* | |
218 | * Bayer format - even number of rows for simplicity, | |
219 | * but let the user play with the top row. | |
220 | */ | |
221 | rect.height = ALIGN(rect.height, 2); | |
222 | ||
223 | /* Datasheet requirement: see register description */ | |
224 | rect.width = ALIGN(rect.width, 2); | |
225 | rect.left = ALIGN(rect.left, 2); | |
226 | ||
227 | soc_camera_limit_side(&rect.left, &rect.width, | |
228 | MT9M001_COLUMN_SKIP, MT9M001_MIN_WIDTH, MT9M001_MAX_WIDTH); | |
229 | ||
230 | soc_camera_limit_side(&rect.top, &rect.height, | |
231 | MT9M001_ROW_SKIP, MT9M001_MIN_HEIGHT, MT9M001_MAX_HEIGHT); | |
232 | ||
f523dd0d | 233 | /* Blanking and start values - default... */ |
9538e1c2 | 234 | ret = reg_write(client, MT9M001_HORIZONTAL_BLANKING, hblank); |
11211641 | 235 | if (!ret) |
9538e1c2 | 236 | ret = reg_write(client, MT9M001_VERTICAL_BLANKING, vblank); |
f523dd0d GL |
237 | |
238 | /* The caller provides a supported format, as verified per | |
d8fac217 | 239 | * call to icd->try_fmt() */ |
11211641 | 240 | if (!ret) |
6a6c8786 | 241 | ret = reg_write(client, MT9M001_COLUMN_START, rect.left); |
11211641 | 242 | if (!ret) |
6a6c8786 | 243 | ret = reg_write(client, MT9M001_ROW_START, rect.top); |
11211641 | 244 | if (!ret) |
6a6c8786 | 245 | ret = reg_write(client, MT9M001_WINDOW_WIDTH, rect.width - 1); |
11211641 | 246 | if (!ret) |
9538e1c2 | 247 | ret = reg_write(client, MT9M001_WINDOW_HEIGHT, |
6a6c8786 | 248 | rect.height + icd->y_skip_top - 1); |
11211641 | 249 | if (!ret && mt9m001->autoexposure) { |
9538e1c2 | 250 | ret = reg_write(client, MT9M001_SHUTTER_WIDTH, |
6a6c8786 | 251 | rect.height + icd->y_skip_top + vblank); |
11211641 | 252 | if (!ret) { |
f523dd0d GL |
253 | const struct v4l2_queryctrl *qctrl = |
254 | soc_camera_find_qctrl(icd->ops, | |
255 | V4L2_CID_EXPOSURE); | |
6a6c8786 | 256 | icd->exposure = (524 + (rect.height + icd->y_skip_top + |
f523dd0d GL |
257 | vblank - 1) * |
258 | (qctrl->maximum - qctrl->minimum)) / | |
259 | 1048 + qctrl->minimum; | |
260 | } | |
261 | } | |
262 | ||
6a6c8786 GL |
263 | if (!ret) |
264 | mt9m001->rect = rect; | |
265 | ||
11211641 | 266 | return ret; |
f523dd0d GL |
267 | } |
268 | ||
6a6c8786 GL |
269 | static int mt9m001_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) |
270 | { | |
271 | struct i2c_client *client = sd->priv; | |
272 | struct mt9m001 *mt9m001 = to_mt9m001(client); | |
273 | ||
274 | a->c = mt9m001->rect; | |
275 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
276 | ||
277 | return 0; | |
278 | } | |
279 | ||
280 | static int mt9m001_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a) | |
281 | { | |
282 | a->bounds.left = MT9M001_COLUMN_SKIP; | |
283 | a->bounds.top = MT9M001_ROW_SKIP; | |
284 | a->bounds.width = MT9M001_MAX_WIDTH; | |
285 | a->bounds.height = MT9M001_MAX_HEIGHT; | |
286 | a->defrect = a->bounds; | |
287 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
288 | a->pixelaspect.numerator = 1; | |
289 | a->pixelaspect.denominator = 1; | |
290 | ||
291 | return 0; | |
292 | } | |
293 | ||
294 | static int mt9m001_g_fmt(struct v4l2_subdev *sd, struct v4l2_format *f) | |
295 | { | |
296 | struct i2c_client *client = sd->priv; | |
297 | struct mt9m001 *mt9m001 = to_mt9m001(client); | |
298 | struct v4l2_pix_format *pix = &f->fmt.pix; | |
299 | ||
300 | pix->width = mt9m001->rect.width; | |
301 | pix->height = mt9m001->rect.height; | |
302 | pix->pixelformat = mt9m001->fourcc; | |
303 | pix->field = V4L2_FIELD_NONE; | |
304 | pix->colorspace = V4L2_COLORSPACE_SRGB; | |
305 | ||
306 | return 0; | |
307 | } | |
308 | ||
979ea1dd | 309 | static int mt9m001_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *f) |
09e231b3 | 310 | { |
979ea1dd | 311 | struct i2c_client *client = sd->priv; |
6a6c8786 GL |
312 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
313 | struct v4l2_pix_format *pix = &f->fmt.pix; | |
08590b96 GL |
314 | struct v4l2_crop a = { |
315 | .c = { | |
6a6c8786 GL |
316 | .left = mt9m001->rect.left, |
317 | .top = mt9m001->rect.top, | |
318 | .width = pix->width, | |
319 | .height = pix->height, | |
08590b96 | 320 | }, |
09e231b3 | 321 | }; |
6a6c8786 | 322 | int ret; |
09e231b3 GL |
323 | |
324 | /* No support for scaling so far, just crop. TODO: use skipping */ | |
6a6c8786 GL |
325 | ret = mt9m001_s_crop(sd, &a); |
326 | if (!ret) { | |
327 | pix->width = mt9m001->rect.width; | |
328 | pix->height = mt9m001->rect.height; | |
329 | mt9m001->fourcc = pix->pixelformat; | |
330 | } | |
331 | ||
332 | return ret; | |
09e231b3 GL |
333 | } |
334 | ||
979ea1dd | 335 | static int mt9m001_try_fmt(struct v4l2_subdev *sd, struct v4l2_format *f) |
f523dd0d | 336 | { |
979ea1dd GL |
337 | struct i2c_client *client = sd->priv; |
338 | struct soc_camera_device *icd = client->dev.platform_data; | |
64f5905e GL |
339 | struct v4l2_pix_format *pix = &f->fmt.pix; |
340 | ||
6a6c8786 GL |
341 | v4l_bound_align_image(&pix->width, MT9M001_MIN_WIDTH, |
342 | MT9M001_MAX_WIDTH, 1, | |
343 | &pix->height, MT9M001_MIN_HEIGHT + icd->y_skip_top, | |
344 | MT9M001_MAX_HEIGHT + icd->y_skip_top, 0, 0); | |
345 | ||
346 | if (pix->pixelformat == V4L2_PIX_FMT_SBGGR8 || | |
347 | pix->pixelformat == V4L2_PIX_FMT_SBGGR16) | |
348 | pix->height = ALIGN(pix->height - 1, 2); | |
f523dd0d GL |
349 | |
350 | return 0; | |
351 | } | |
352 | ||
979ea1dd GL |
353 | static int mt9m001_g_chip_ident(struct v4l2_subdev *sd, |
354 | struct v4l2_dbg_chip_ident *id) | |
f523dd0d | 355 | { |
979ea1dd GL |
356 | struct i2c_client *client = sd->priv; |
357 | struct mt9m001 *mt9m001 = to_mt9m001(client); | |
f523dd0d | 358 | |
aecde8b5 | 359 | if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR) |
f523dd0d GL |
360 | return -EINVAL; |
361 | ||
40e2e092 | 362 | if (id->match.addr != client->addr) |
f523dd0d GL |
363 | return -ENODEV; |
364 | ||
365 | id->ident = mt9m001->model; | |
366 | id->revision = 0; | |
367 | ||
368 | return 0; | |
369 | } | |
370 | ||
371 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
979ea1dd GL |
372 | static int mt9m001_g_register(struct v4l2_subdev *sd, |
373 | struct v4l2_dbg_register *reg) | |
f523dd0d | 374 | { |
979ea1dd | 375 | struct i2c_client *client = sd->priv; |
f523dd0d | 376 | |
aecde8b5 | 377 | if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) |
f523dd0d GL |
378 | return -EINVAL; |
379 | ||
9538e1c2 | 380 | if (reg->match.addr != client->addr) |
f523dd0d GL |
381 | return -ENODEV; |
382 | ||
aecde8b5 | 383 | reg->size = 2; |
9538e1c2 | 384 | reg->val = reg_read(client, reg->reg); |
f523dd0d GL |
385 | |
386 | if (reg->val > 0xffff) | |
387 | return -EIO; | |
388 | ||
389 | return 0; | |
390 | } | |
391 | ||
979ea1dd GL |
392 | static int mt9m001_s_register(struct v4l2_subdev *sd, |
393 | struct v4l2_dbg_register *reg) | |
f523dd0d | 394 | { |
979ea1dd | 395 | struct i2c_client *client = sd->priv; |
f523dd0d | 396 | |
aecde8b5 | 397 | if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) |
f523dd0d GL |
398 | return -EINVAL; |
399 | ||
9538e1c2 | 400 | if (reg->match.addr != client->addr) |
f523dd0d GL |
401 | return -ENODEV; |
402 | ||
9538e1c2 | 403 | if (reg_write(client, reg->reg, reg->val) < 0) |
f523dd0d GL |
404 | return -EIO; |
405 | ||
406 | return 0; | |
407 | } | |
408 | #endif | |
409 | ||
4407a463 | 410 | static const struct v4l2_queryctrl mt9m001_controls[] = { |
f523dd0d GL |
411 | { |
412 | .id = V4L2_CID_VFLIP, | |
413 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
414 | .name = "Flip Vertically", | |
415 | .minimum = 0, | |
416 | .maximum = 1, | |
417 | .step = 1, | |
418 | .default_value = 0, | |
419 | }, { | |
420 | .id = V4L2_CID_GAIN, | |
421 | .type = V4L2_CTRL_TYPE_INTEGER, | |
422 | .name = "Gain", | |
423 | .minimum = 0, | |
424 | .maximum = 127, | |
425 | .step = 1, | |
426 | .default_value = 64, | |
427 | .flags = V4L2_CTRL_FLAG_SLIDER, | |
428 | }, { | |
429 | .id = V4L2_CID_EXPOSURE, | |
430 | .type = V4L2_CTRL_TYPE_INTEGER, | |
431 | .name = "Exposure", | |
432 | .minimum = 1, | |
433 | .maximum = 255, | |
434 | .step = 1, | |
435 | .default_value = 255, | |
436 | .flags = V4L2_CTRL_FLAG_SLIDER, | |
437 | }, { | |
438 | .id = V4L2_CID_EXPOSURE_AUTO, | |
439 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
440 | .name = "Automatic Exposure", | |
441 | .minimum = 0, | |
442 | .maximum = 1, | |
443 | .step = 1, | |
444 | .default_value = 1, | |
445 | } | |
446 | }; | |
447 | ||
f523dd0d | 448 | static struct soc_camera_ops mt9m001_ops = { |
f523dd0d GL |
449 | .init = mt9m001_init, |
450 | .release = mt9m001_release, | |
ad5f2e85 GL |
451 | .set_bus_param = mt9m001_set_bus_param, |
452 | .query_bus_param = mt9m001_query_bus_param, | |
f523dd0d GL |
453 | .controls = mt9m001_controls, |
454 | .num_controls = ARRAY_SIZE(mt9m001_controls), | |
f523dd0d GL |
455 | }; |
456 | ||
979ea1dd | 457 | static int mt9m001_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
f523dd0d | 458 | { |
979ea1dd GL |
459 | struct i2c_client *client = sd->priv; |
460 | struct mt9m001 *mt9m001 = to_mt9m001(client); | |
f523dd0d GL |
461 | int data; |
462 | ||
463 | switch (ctrl->id) { | |
464 | case V4L2_CID_VFLIP: | |
9538e1c2 | 465 | data = reg_read(client, MT9M001_READ_OPTIONS2); |
f523dd0d GL |
466 | if (data < 0) |
467 | return -EIO; | |
468 | ctrl->value = !!(data & 0x8000); | |
469 | break; | |
470 | case V4L2_CID_EXPOSURE_AUTO: | |
471 | ctrl->value = mt9m001->autoexposure; | |
472 | break; | |
473 | } | |
474 | return 0; | |
475 | } | |
476 | ||
979ea1dd | 477 | static int mt9m001_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
f523dd0d | 478 | { |
979ea1dd GL |
479 | struct i2c_client *client = sd->priv; |
480 | struct mt9m001 *mt9m001 = to_mt9m001(client); | |
481 | struct soc_camera_device *icd = client->dev.platform_data; | |
f523dd0d GL |
482 | const struct v4l2_queryctrl *qctrl; |
483 | int data; | |
484 | ||
485 | qctrl = soc_camera_find_qctrl(&mt9m001_ops, ctrl->id); | |
486 | ||
487 | if (!qctrl) | |
488 | return -EINVAL; | |
489 | ||
490 | switch (ctrl->id) { | |
491 | case V4L2_CID_VFLIP: | |
492 | if (ctrl->value) | |
9538e1c2 | 493 | data = reg_set(client, MT9M001_READ_OPTIONS2, 0x8000); |
f523dd0d | 494 | else |
9538e1c2 | 495 | data = reg_clear(client, MT9M001_READ_OPTIONS2, 0x8000); |
f523dd0d GL |
496 | if (data < 0) |
497 | return -EIO; | |
498 | break; | |
499 | case V4L2_CID_GAIN: | |
500 | if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum) | |
501 | return -EINVAL; | |
502 | /* See Datasheet Table 7, Gain settings. */ | |
503 | if (ctrl->value <= qctrl->default_value) { | |
504 | /* Pack it into 0..1 step 0.125, register values 0..8 */ | |
505 | unsigned long range = qctrl->default_value - qctrl->minimum; | |
506 | data = ((ctrl->value - qctrl->minimum) * 8 + range / 2) / range; | |
507 | ||
85f8be68 | 508 | dev_dbg(&client->dev, "Setting gain %d\n", data); |
9538e1c2 | 509 | data = reg_write(client, MT9M001_GLOBAL_GAIN, data); |
f523dd0d GL |
510 | if (data < 0) |
511 | return -EIO; | |
512 | } else { | |
513 | /* Pack it into 1.125..15 variable step, register values 9..67 */ | |
514 | /* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */ | |
515 | unsigned long range = qctrl->maximum - qctrl->default_value - 1; | |
516 | unsigned long gain = ((ctrl->value - qctrl->default_value - 1) * | |
517 | 111 + range / 2) / range + 9; | |
518 | ||
519 | if (gain <= 32) | |
520 | data = gain; | |
521 | else if (gain <= 64) | |
522 | data = ((gain - 32) * 16 + 16) / 32 + 80; | |
523 | else | |
524 | data = ((gain - 64) * 7 + 28) / 56 + 96; | |
525 | ||
85f8be68 | 526 | dev_dbg(&client->dev, "Setting gain from %d to %d\n", |
9538e1c2 GL |
527 | reg_read(client, MT9M001_GLOBAL_GAIN), data); |
528 | data = reg_write(client, MT9M001_GLOBAL_GAIN, data); | |
f523dd0d GL |
529 | if (data < 0) |
530 | return -EIO; | |
531 | } | |
532 | ||
533 | /* Success */ | |
534 | icd->gain = ctrl->value; | |
535 | break; | |
536 | case V4L2_CID_EXPOSURE: | |
537 | /* mt9m001 has maximum == default */ | |
538 | if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum) | |
539 | return -EINVAL; | |
540 | else { | |
541 | unsigned long range = qctrl->maximum - qctrl->minimum; | |
542 | unsigned long shutter = ((ctrl->value - qctrl->minimum) * 1048 + | |
543 | range / 2) / range + 1; | |
544 | ||
85f8be68 GL |
545 | dev_dbg(&client->dev, |
546 | "Setting shutter width from %d to %lu\n", | |
547 | reg_read(client, MT9M001_SHUTTER_WIDTH), | |
548 | shutter); | |
9538e1c2 | 549 | if (reg_write(client, MT9M001_SHUTTER_WIDTH, shutter) < 0) |
f523dd0d GL |
550 | return -EIO; |
551 | icd->exposure = ctrl->value; | |
552 | mt9m001->autoexposure = 0; | |
553 | } | |
554 | break; | |
555 | case V4L2_CID_EXPOSURE_AUTO: | |
556 | if (ctrl->value) { | |
557 | const u16 vblank = 25; | |
a0705b07 | 558 | if (reg_write(client, MT9M001_SHUTTER_WIDTH, |
6a6c8786 | 559 | mt9m001->rect.height + |
f523dd0d GL |
560 | icd->y_skip_top + vblank) < 0) |
561 | return -EIO; | |
562 | qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE); | |
6a6c8786 | 563 | icd->exposure = (524 + (mt9m001->rect.height + |
a0705b07 | 564 | icd->y_skip_top + vblank - 1) * |
f523dd0d GL |
565 | (qctrl->maximum - qctrl->minimum)) / |
566 | 1048 + qctrl->minimum; | |
567 | mt9m001->autoexposure = 1; | |
568 | } else | |
569 | mt9m001->autoexposure = 0; | |
570 | break; | |
571 | } | |
572 | return 0; | |
573 | } | |
574 | ||
575 | /* Interface active, can use i2c. If it fails, it can indeed mean, that | |
576 | * this wasn't our capture interface, so, we wait for the right one */ | |
40e2e092 GL |
577 | static int mt9m001_video_probe(struct soc_camera_device *icd, |
578 | struct i2c_client *client) | |
f523dd0d | 579 | { |
979ea1dd | 580 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
40e2e092 | 581 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
f523dd0d | 582 | s32 data; |
36034dc3 | 583 | unsigned long flags; |
f523dd0d GL |
584 | |
585 | /* We must have a parent by now. And it cannot be a wrong one. | |
586 | * So this entire test is completely redundant. */ | |
587 | if (!icd->dev.parent || | |
588 | to_soc_camera_host(icd->dev.parent)->nr != icd->iface) | |
589 | return -ENODEV; | |
590 | ||
591 | /* Enable the chip */ | |
9538e1c2 | 592 | data = reg_write(client, MT9M001_CHIP_ENABLE, 1); |
85f8be68 | 593 | dev_dbg(&client->dev, "write: %d\n", data); |
f523dd0d GL |
594 | |
595 | /* Read out the chip version register */ | |
9538e1c2 | 596 | data = reg_read(client, MT9M001_CHIP_VERSION); |
f523dd0d GL |
597 | |
598 | /* must be 0x8411 or 0x8421 for colour sensor and 8431 for bw */ | |
599 | switch (data) { | |
600 | case 0x8411: | |
601 | case 0x8421: | |
602 | mt9m001->model = V4L2_IDENT_MT9M001C12ST; | |
26f1b942 | 603 | icd->formats = mt9m001_colour_formats; |
f523dd0d GL |
604 | break; |
605 | case 0x8431: | |
606 | mt9m001->model = V4L2_IDENT_MT9M001C12STM; | |
26f1b942 | 607 | icd->formats = mt9m001_monochrome_formats; |
f523dd0d GL |
608 | break; |
609 | default: | |
85f8be68 | 610 | dev_err(&client->dev, |
f523dd0d | 611 | "No MT9M001 chip detected, register read %x\n", data); |
40e2e092 | 612 | return -ENODEV; |
f523dd0d GL |
613 | } |
614 | ||
36034dc3 SH |
615 | icd->num_formats = 0; |
616 | ||
617 | /* | |
618 | * This is a 10bit sensor, so by default we only allow 10bit. | |
619 | * The platform may support different bus widths due to | |
620 | * different routing of the data lines. | |
621 | */ | |
622 | if (icl->query_bus_param) | |
623 | flags = icl->query_bus_param(icl); | |
624 | else | |
625 | flags = SOCAM_DATAWIDTH_10; | |
626 | ||
627 | if (flags & SOCAM_DATAWIDTH_10) | |
628 | icd->num_formats++; | |
629 | else | |
630 | icd->formats++; | |
631 | ||
632 | if (flags & SOCAM_DATAWIDTH_8) | |
633 | icd->num_formats++; | |
634 | ||
6a6c8786 GL |
635 | mt9m001->fourcc = icd->formats->fourcc; |
636 | ||
85f8be68 | 637 | dev_info(&client->dev, "Detected a MT9M001 chip ID %x (%s)\n", data, |
f523dd0d GL |
638 | data == 0x8431 ? "C12STM" : "C12ST"); |
639 | ||
f523dd0d | 640 | return 0; |
f523dd0d GL |
641 | } |
642 | ||
643 | static void mt9m001_video_remove(struct soc_camera_device *icd) | |
644 | { | |
40e2e092 | 645 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
f523dd0d | 646 | |
6a6c8786 | 647 | dev_dbg(&icd->dev, "Video removed: %p, %p\n", |
a85bdace | 648 | icd->dev.parent, icd->vdev); |
594bb46d GL |
649 | if (icl->free_bus) |
650 | icl->free_bus(icl); | |
f523dd0d GL |
651 | } |
652 | ||
979ea1dd GL |
653 | static struct v4l2_subdev_core_ops mt9m001_subdev_core_ops = { |
654 | .g_ctrl = mt9m001_g_ctrl, | |
655 | .s_ctrl = mt9m001_s_ctrl, | |
656 | .g_chip_ident = mt9m001_g_chip_ident, | |
657 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
658 | .g_register = mt9m001_g_register, | |
659 | .s_register = mt9m001_s_register, | |
660 | #endif | |
661 | }; | |
662 | ||
663 | static struct v4l2_subdev_video_ops mt9m001_subdev_video_ops = { | |
664 | .s_stream = mt9m001_s_stream, | |
665 | .s_fmt = mt9m001_s_fmt, | |
6a6c8786 | 666 | .g_fmt = mt9m001_g_fmt, |
979ea1dd | 667 | .try_fmt = mt9m001_try_fmt, |
08590b96 | 668 | .s_crop = mt9m001_s_crop, |
6a6c8786 GL |
669 | .g_crop = mt9m001_g_crop, |
670 | .cropcap = mt9m001_cropcap, | |
979ea1dd GL |
671 | }; |
672 | ||
673 | static struct v4l2_subdev_ops mt9m001_subdev_ops = { | |
674 | .core = &mt9m001_subdev_core_ops, | |
675 | .video = &mt9m001_subdev_video_ops, | |
676 | }; | |
677 | ||
d2653e92 JD |
678 | static int mt9m001_probe(struct i2c_client *client, |
679 | const struct i2c_device_id *did) | |
f523dd0d GL |
680 | { |
681 | struct mt9m001 *mt9m001; | |
40e2e092 | 682 | struct soc_camera_device *icd = client->dev.platform_data; |
f523dd0d | 683 | struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); |
40e2e092 | 684 | struct soc_camera_link *icl; |
f523dd0d GL |
685 | int ret; |
686 | ||
40e2e092 GL |
687 | if (!icd) { |
688 | dev_err(&client->dev, "MT9M001: missing soc-camera data!\n"); | |
689 | return -EINVAL; | |
690 | } | |
691 | ||
692 | icl = to_soc_camera_link(icd); | |
f523dd0d GL |
693 | if (!icl) { |
694 | dev_err(&client->dev, "MT9M001 driver needs platform data\n"); | |
695 | return -EINVAL; | |
696 | } | |
697 | ||
698 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) { | |
699 | dev_warn(&adapter->dev, | |
700 | "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n"); | |
701 | return -EIO; | |
702 | } | |
703 | ||
704 | mt9m001 = kzalloc(sizeof(struct mt9m001), GFP_KERNEL); | |
705 | if (!mt9m001) | |
706 | return -ENOMEM; | |
707 | ||
979ea1dd | 708 | v4l2_i2c_subdev_init(&mt9m001->subdev, client, &mt9m001_subdev_ops); |
f523dd0d GL |
709 | |
710 | /* Second stage probe - when a capture adapter is there */ | |
a0705b07 | 711 | icd->ops = &mt9m001_ops; |
a0705b07 | 712 | icd->y_skip_top = 1; |
6a6c8786 GL |
713 | |
714 | mt9m001->rect.left = MT9M001_COLUMN_SKIP; | |
715 | mt9m001->rect.top = MT9M001_ROW_SKIP; | |
716 | mt9m001->rect.width = MT9M001_MAX_WIDTH; | |
717 | mt9m001->rect.height = MT9M001_MAX_HEIGHT; | |
718 | ||
f523dd0d GL |
719 | /* Simulated autoexposure. If enabled, we calculate shutter width |
720 | * ourselves in the driver based on vertical blanking and frame width */ | |
721 | mt9m001->autoexposure = 1; | |
722 | ||
40e2e092 GL |
723 | ret = mt9m001_video_probe(icd, client); |
724 | if (ret) { | |
725 | icd->ops = NULL; | |
726 | i2c_set_clientdata(client, NULL); | |
727 | kfree(mt9m001); | |
728 | } | |
f523dd0d | 729 | |
f523dd0d GL |
730 | return ret; |
731 | } | |
732 | ||
733 | static int mt9m001_remove(struct i2c_client *client) | |
734 | { | |
979ea1dd | 735 | struct mt9m001 *mt9m001 = to_mt9m001(client); |
40e2e092 | 736 | struct soc_camera_device *icd = client->dev.platform_data; |
f523dd0d | 737 | |
40e2e092 GL |
738 | icd->ops = NULL; |
739 | mt9m001_video_remove(icd); | |
740 | i2c_set_clientdata(client, NULL); | |
741 | client->driver = NULL; | |
f523dd0d GL |
742 | kfree(mt9m001); |
743 | ||
744 | return 0; | |
745 | } | |
746 | ||
3760f736 JD |
747 | static const struct i2c_device_id mt9m001_id[] = { |
748 | { "mt9m001", 0 }, | |
749 | { } | |
750 | }; | |
751 | MODULE_DEVICE_TABLE(i2c, mt9m001_id); | |
752 | ||
f523dd0d GL |
753 | static struct i2c_driver mt9m001_i2c_driver = { |
754 | .driver = { | |
755 | .name = "mt9m001", | |
756 | }, | |
757 | .probe = mt9m001_probe, | |
758 | .remove = mt9m001_remove, | |
3760f736 | 759 | .id_table = mt9m001_id, |
f523dd0d GL |
760 | }; |
761 | ||
762 | static int __init mt9m001_mod_init(void) | |
763 | { | |
764 | return i2c_add_driver(&mt9m001_i2c_driver); | |
765 | } | |
766 | ||
767 | static void __exit mt9m001_mod_exit(void) | |
768 | { | |
769 | i2c_del_driver(&mt9m001_i2c_driver); | |
770 | } | |
771 | ||
772 | module_init(mt9m001_mod_init); | |
773 | module_exit(mt9m001_mod_exit); | |
774 | ||
775 | MODULE_DESCRIPTION("Micron MT9M001 Camera driver"); | |
776 | MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>"); | |
777 | MODULE_LICENSE("GPL"); |