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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 | ||
16 | #include <media/v4l2-common.h> | |
17 | #include <media/v4l2-chip-ident.h> | |
18 | #include <media/soc_camera.h> | |
19 | ||
f523dd0d GL |
20 | /* mt9m001 i2c address 0x5d |
21 | * The platform has to define i2c_board_info | |
22 | * and call i2c_register_board_info() */ | |
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 | ||
42 | static const struct soc_camera_data_format mt9m001_colour_formats[] = { | |
bb55de3b GL |
43 | /* Order important: first natively supported, |
44 | * second supported with a GPIO extender */ | |
f523dd0d | 45 | { |
bb55de3b GL |
46 | .name = "Bayer (sRGB) 10 bit", |
47 | .depth = 10, | |
48 | .fourcc = V4L2_PIX_FMT_SBGGR16, | |
49 | .colorspace = V4L2_COLORSPACE_SRGB, | |
50 | }, { | |
51 | .name = "Bayer (sRGB) 8 bit", | |
52 | .depth = 8, | |
f523dd0d GL |
53 | .fourcc = V4L2_PIX_FMT_SBGGR8, |
54 | .colorspace = V4L2_COLORSPACE_SRGB, | |
55 | } | |
56 | }; | |
57 | ||
58 | static const struct soc_camera_data_format mt9m001_monochrome_formats[] = { | |
bb55de3b | 59 | /* Order important - see above */ |
f523dd0d GL |
60 | { |
61 | .name = "Monochrome 10 bit", | |
62 | .depth = 10, | |
63 | .fourcc = V4L2_PIX_FMT_Y16, | |
64 | }, { | |
65 | .name = "Monochrome 8 bit", | |
66 | .depth = 8, | |
67 | .fourcc = V4L2_PIX_FMT_GREY, | |
68 | }, | |
69 | }; | |
70 | ||
71 | struct mt9m001 { | |
72 | struct i2c_client *client; | |
73 | struct soc_camera_device icd; | |
74 | int model; /* V4L2_IDENT_MT9M001* codes from v4l2-chip-ident.h */ | |
f523dd0d | 75 | unsigned char autoexposure; |
f523dd0d GL |
76 | }; |
77 | ||
9538e1c2 | 78 | static int reg_read(struct i2c_client *client, const u8 reg) |
f523dd0d | 79 | { |
f523dd0d GL |
80 | s32 data = i2c_smbus_read_word_data(client, reg); |
81 | return data < 0 ? data : swab16(data); | |
82 | } | |
83 | ||
9538e1c2 | 84 | static int reg_write(struct i2c_client *client, const u8 reg, |
f523dd0d GL |
85 | const u16 data) |
86 | { | |
9538e1c2 | 87 | return i2c_smbus_write_word_data(client, reg, swab16(data)); |
f523dd0d GL |
88 | } |
89 | ||
9538e1c2 | 90 | static int reg_set(struct i2c_client *client, const u8 reg, |
f523dd0d GL |
91 | const u16 data) |
92 | { | |
93 | int ret; | |
94 | ||
9538e1c2 | 95 | ret = reg_read(client, reg); |
f523dd0d GL |
96 | if (ret < 0) |
97 | return ret; | |
9538e1c2 | 98 | return reg_write(client, reg, ret | data); |
f523dd0d GL |
99 | } |
100 | ||
9538e1c2 | 101 | static int reg_clear(struct i2c_client *client, const u8 reg, |
f523dd0d GL |
102 | const u16 data) |
103 | { | |
104 | int ret; | |
105 | ||
9538e1c2 | 106 | ret = reg_read(client, reg); |
f523dd0d GL |
107 | if (ret < 0) |
108 | return ret; | |
9538e1c2 | 109 | return reg_write(client, reg, ret & ~data); |
f523dd0d GL |
110 | } |
111 | ||
112 | static int mt9m001_init(struct soc_camera_device *icd) | |
113 | { | |
9538e1c2 GL |
114 | struct i2c_client *client = to_i2c_client(icd->control); |
115 | struct soc_camera_link *icl = client->dev.platform_data; | |
f523dd0d GL |
116 | int ret; |
117 | ||
5e85e732 | 118 | dev_dbg(icd->vdev->parent, "%s\n", __func__); |
f523dd0d | 119 | |
81034663 | 120 | if (icl->power) { |
9538e1c2 | 121 | ret = icl->power(&client->dev, 1); |
81034663 SH |
122 | if (ret < 0) { |
123 | dev_err(icd->vdev->parent, | |
124 | "Platform failed to power-on the camera.\n"); | |
125 | return ret; | |
126 | } | |
127 | } | |
128 | ||
129 | /* The camera could have been already on, we reset it additionally */ | |
130 | if (icl->reset) | |
9538e1c2 | 131 | ret = icl->reset(&client->dev); |
81034663 SH |
132 | else |
133 | ret = -ENODEV; | |
134 | ||
135 | if (ret < 0) { | |
136 | /* Either no platform reset, or platform reset failed */ | |
9538e1c2 | 137 | ret = reg_write(client, MT9M001_RESET, 1); |
81034663 | 138 | if (!ret) |
9538e1c2 | 139 | ret = reg_write(client, MT9M001_RESET, 0); |
81034663 | 140 | } |
11211641 GL |
141 | /* Disable chip, synchronous option update */ |
142 | if (!ret) | |
9538e1c2 | 143 | ret = reg_write(client, MT9M001_OUTPUT_CONTROL, 0); |
f523dd0d | 144 | |
11211641 | 145 | return ret; |
f523dd0d GL |
146 | } |
147 | ||
148 | static int mt9m001_release(struct soc_camera_device *icd) | |
149 | { | |
9538e1c2 GL |
150 | struct i2c_client *client = to_i2c_client(icd->control); |
151 | struct soc_camera_link *icl = client->dev.platform_data; | |
81034663 | 152 | |
f523dd0d | 153 | /* Disable the chip */ |
9538e1c2 | 154 | reg_write(client, MT9M001_OUTPUT_CONTROL, 0); |
81034663 SH |
155 | |
156 | if (icl->power) | |
9538e1c2 | 157 | icl->power(&client->dev, 0); |
81034663 | 158 | |
f523dd0d GL |
159 | return 0; |
160 | } | |
161 | ||
162 | static int mt9m001_start_capture(struct soc_camera_device *icd) | |
163 | { | |
9538e1c2 GL |
164 | struct i2c_client *client = to_i2c_client(icd->control); |
165 | ||
f523dd0d | 166 | /* Switch to master "normal" mode */ |
9538e1c2 | 167 | if (reg_write(client, MT9M001_OUTPUT_CONTROL, 2) < 0) |
f523dd0d GL |
168 | return -EIO; |
169 | return 0; | |
170 | } | |
171 | ||
172 | static int mt9m001_stop_capture(struct soc_camera_device *icd) | |
173 | { | |
9538e1c2 GL |
174 | struct i2c_client *client = to_i2c_client(icd->control); |
175 | ||
f523dd0d | 176 | /* Stop sensor readout */ |
9538e1c2 | 177 | if (reg_write(client, MT9M001_OUTPUT_CONTROL, 0) < 0) |
f523dd0d GL |
178 | return -EIO; |
179 | return 0; | |
180 | } | |
181 | ||
ad5f2e85 GL |
182 | static int mt9m001_set_bus_param(struct soc_camera_device *icd, |
183 | unsigned long flags) | |
f523dd0d GL |
184 | { |
185 | struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd); | |
36034dc3 SH |
186 | struct soc_camera_link *icl = mt9m001->client->dev.platform_data; |
187 | unsigned long width_flag = flags & SOCAM_DATAWIDTH_MASK; | |
f523dd0d | 188 | |
36034dc3 SH |
189 | /* Only one width bit may be set */ |
190 | if (!is_power_of_2(width_flag)) | |
191 | return -EINVAL; | |
f523dd0d | 192 | |
36034dc3 SH |
193 | if (icl->set_bus_param) |
194 | return icl->set_bus_param(icl, width_flag); | |
f523dd0d | 195 | |
36034dc3 SH |
196 | /* |
197 | * Without board specific bus width settings we only support the | |
198 | * sensors native bus width | |
199 | */ | |
200 | if (width_flag == SOCAM_DATAWIDTH_10) | |
201 | return 0; | |
f523dd0d | 202 | |
36034dc3 | 203 | return -EINVAL; |
ad5f2e85 GL |
204 | } |
205 | ||
206 | static unsigned long mt9m001_query_bus_param(struct soc_camera_device *icd) | |
207 | { | |
208 | struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd); | |
bd73b36f GL |
209 | struct soc_camera_link *icl = mt9m001->client->dev.platform_data; |
210 | /* MT9M001 has all capture_format parameters fixed */ | |
e951cbf2 | 211 | unsigned long flags = SOCAM_PCLK_SAMPLE_FALLING | |
bd73b36f | 212 | SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_HIGH | |
2d9329f3 | 213 | SOCAM_DATA_ACTIVE_HIGH | SOCAM_MASTER; |
ad5f2e85 | 214 | |
36034dc3 SH |
215 | if (icl->query_bus_param) |
216 | flags |= icl->query_bus_param(icl) & SOCAM_DATAWIDTH_MASK; | |
217 | else | |
218 | flags |= SOCAM_DATAWIDTH_10; | |
ad5f2e85 | 219 | |
bd73b36f | 220 | return soc_camera_apply_sensor_flags(icl, flags); |
ad5f2e85 GL |
221 | } |
222 | ||
09e231b3 GL |
223 | static int mt9m001_set_crop(struct soc_camera_device *icd, |
224 | struct v4l2_rect *rect) | |
ad5f2e85 | 225 | { |
9538e1c2 | 226 | struct i2c_client *client = to_i2c_client(icd->control); |
ad5f2e85 GL |
227 | struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd); |
228 | int ret; | |
229 | const u16 hblank = 9, vblank = 25; | |
230 | ||
f523dd0d | 231 | /* Blanking and start values - default... */ |
9538e1c2 | 232 | ret = reg_write(client, MT9M001_HORIZONTAL_BLANKING, hblank); |
11211641 | 233 | if (!ret) |
9538e1c2 | 234 | ret = reg_write(client, MT9M001_VERTICAL_BLANKING, vblank); |
f523dd0d GL |
235 | |
236 | /* The caller provides a supported format, as verified per | |
d8fac217 | 237 | * call to icd->try_fmt() */ |
11211641 | 238 | if (!ret) |
9538e1c2 | 239 | ret = reg_write(client, MT9M001_COLUMN_START, rect->left); |
11211641 | 240 | if (!ret) |
9538e1c2 | 241 | ret = reg_write(client, MT9M001_ROW_START, rect->top); |
11211641 | 242 | if (!ret) |
9538e1c2 | 243 | ret = reg_write(client, MT9M001_WINDOW_WIDTH, rect->width - 1); |
11211641 | 244 | if (!ret) |
9538e1c2 | 245 | ret = reg_write(client, MT9M001_WINDOW_HEIGHT, |
f523dd0d | 246 | rect->height + icd->y_skip_top - 1); |
11211641 | 247 | if (!ret && mt9m001->autoexposure) { |
9538e1c2 | 248 | ret = reg_write(client, MT9M001_SHUTTER_WIDTH, |
f523dd0d | 249 | rect->height + icd->y_skip_top + vblank); |
11211641 | 250 | if (!ret) { |
f523dd0d GL |
251 | const struct v4l2_queryctrl *qctrl = |
252 | soc_camera_find_qctrl(icd->ops, | |
253 | V4L2_CID_EXPOSURE); | |
254 | icd->exposure = (524 + (rect->height + icd->y_skip_top + | |
255 | vblank - 1) * | |
256 | (qctrl->maximum - qctrl->minimum)) / | |
257 | 1048 + qctrl->minimum; | |
258 | } | |
259 | } | |
260 | ||
11211641 | 261 | return ret; |
f523dd0d GL |
262 | } |
263 | ||
09e231b3 GL |
264 | static int mt9m001_set_fmt(struct soc_camera_device *icd, |
265 | struct v4l2_format *f) | |
266 | { | |
267 | struct v4l2_rect rect = { | |
268 | .left = icd->x_current, | |
269 | .top = icd->y_current, | |
270 | .width = f->fmt.pix.width, | |
271 | .height = f->fmt.pix.height, | |
272 | }; | |
273 | ||
274 | /* No support for scaling so far, just crop. TODO: use skipping */ | |
275 | return mt9m001_set_crop(icd, &rect); | |
276 | } | |
277 | ||
d8fac217 GL |
278 | static int mt9m001_try_fmt(struct soc_camera_device *icd, |
279 | struct v4l2_format *f) | |
f523dd0d | 280 | { |
64f5905e GL |
281 | struct v4l2_pix_format *pix = &f->fmt.pix; |
282 | ||
653dc59b TP |
283 | v4l_bound_align_image(&pix->width, 48, 1280, 1, |
284 | &pix->height, 32 + icd->y_skip_top, | |
285 | 1024 + icd->y_skip_top, 0, 0); | |
f523dd0d GL |
286 | |
287 | return 0; | |
288 | } | |
289 | ||
290 | static int mt9m001_get_chip_id(struct soc_camera_device *icd, | |
aecde8b5 | 291 | struct v4l2_dbg_chip_ident *id) |
f523dd0d GL |
292 | { |
293 | struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd); | |
294 | ||
aecde8b5 | 295 | if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR) |
f523dd0d GL |
296 | return -EINVAL; |
297 | ||
aecde8b5 | 298 | if (id->match.addr != mt9m001->client->addr) |
f523dd0d GL |
299 | return -ENODEV; |
300 | ||
301 | id->ident = mt9m001->model; | |
302 | id->revision = 0; | |
303 | ||
304 | return 0; | |
305 | } | |
306 | ||
307 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
308 | static int mt9m001_get_register(struct soc_camera_device *icd, | |
aecde8b5 | 309 | struct v4l2_dbg_register *reg) |
f523dd0d | 310 | { |
9538e1c2 | 311 | struct i2c_client *client = to_i2c_client(icd->control); |
f523dd0d | 312 | |
aecde8b5 | 313 | if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) |
f523dd0d GL |
314 | return -EINVAL; |
315 | ||
9538e1c2 | 316 | if (reg->match.addr != client->addr) |
f523dd0d GL |
317 | return -ENODEV; |
318 | ||
aecde8b5 | 319 | reg->size = 2; |
9538e1c2 | 320 | reg->val = reg_read(client, reg->reg); |
f523dd0d GL |
321 | |
322 | if (reg->val > 0xffff) | |
323 | return -EIO; | |
324 | ||
325 | return 0; | |
326 | } | |
327 | ||
328 | static int mt9m001_set_register(struct soc_camera_device *icd, | |
aecde8b5 | 329 | struct v4l2_dbg_register *reg) |
f523dd0d | 330 | { |
9538e1c2 | 331 | struct i2c_client *client = to_i2c_client(icd->control); |
f523dd0d | 332 | |
aecde8b5 | 333 | if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) |
f523dd0d GL |
334 | return -EINVAL; |
335 | ||
9538e1c2 | 336 | if (reg->match.addr != client->addr) |
f523dd0d GL |
337 | return -ENODEV; |
338 | ||
9538e1c2 | 339 | if (reg_write(client, reg->reg, reg->val) < 0) |
f523dd0d GL |
340 | return -EIO; |
341 | ||
342 | return 0; | |
343 | } | |
344 | #endif | |
345 | ||
4407a463 | 346 | static const struct v4l2_queryctrl mt9m001_controls[] = { |
f523dd0d GL |
347 | { |
348 | .id = V4L2_CID_VFLIP, | |
349 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
350 | .name = "Flip Vertically", | |
351 | .minimum = 0, | |
352 | .maximum = 1, | |
353 | .step = 1, | |
354 | .default_value = 0, | |
355 | }, { | |
356 | .id = V4L2_CID_GAIN, | |
357 | .type = V4L2_CTRL_TYPE_INTEGER, | |
358 | .name = "Gain", | |
359 | .minimum = 0, | |
360 | .maximum = 127, | |
361 | .step = 1, | |
362 | .default_value = 64, | |
363 | .flags = V4L2_CTRL_FLAG_SLIDER, | |
364 | }, { | |
365 | .id = V4L2_CID_EXPOSURE, | |
366 | .type = V4L2_CTRL_TYPE_INTEGER, | |
367 | .name = "Exposure", | |
368 | .minimum = 1, | |
369 | .maximum = 255, | |
370 | .step = 1, | |
371 | .default_value = 255, | |
372 | .flags = V4L2_CTRL_FLAG_SLIDER, | |
373 | }, { | |
374 | .id = V4L2_CID_EXPOSURE_AUTO, | |
375 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
376 | .name = "Automatic Exposure", | |
377 | .minimum = 0, | |
378 | .maximum = 1, | |
379 | .step = 1, | |
380 | .default_value = 1, | |
381 | } | |
382 | }; | |
383 | ||
26f1b942 GL |
384 | static int mt9m001_video_probe(struct soc_camera_device *); |
385 | static void mt9m001_video_remove(struct soc_camera_device *); | |
386 | static int mt9m001_get_control(struct soc_camera_device *, struct v4l2_control *); | |
387 | static int mt9m001_set_control(struct soc_camera_device *, struct v4l2_control *); | |
f523dd0d GL |
388 | |
389 | static struct soc_camera_ops mt9m001_ops = { | |
390 | .owner = THIS_MODULE, | |
26f1b942 GL |
391 | .probe = mt9m001_video_probe, |
392 | .remove = mt9m001_video_remove, | |
f523dd0d GL |
393 | .init = mt9m001_init, |
394 | .release = mt9m001_release, | |
395 | .start_capture = mt9m001_start_capture, | |
396 | .stop_capture = mt9m001_stop_capture, | |
09e231b3 | 397 | .set_crop = mt9m001_set_crop, |
d8fac217 GL |
398 | .set_fmt = mt9m001_set_fmt, |
399 | .try_fmt = mt9m001_try_fmt, | |
ad5f2e85 GL |
400 | .set_bus_param = mt9m001_set_bus_param, |
401 | .query_bus_param = mt9m001_query_bus_param, | |
f523dd0d GL |
402 | .controls = mt9m001_controls, |
403 | .num_controls = ARRAY_SIZE(mt9m001_controls), | |
404 | .get_control = mt9m001_get_control, | |
405 | .set_control = mt9m001_set_control, | |
406 | .get_chip_id = mt9m001_get_chip_id, | |
407 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
408 | .get_register = mt9m001_get_register, | |
409 | .set_register = mt9m001_set_register, | |
410 | #endif | |
411 | }; | |
412 | ||
413 | static int mt9m001_get_control(struct soc_camera_device *icd, struct v4l2_control *ctrl) | |
414 | { | |
9538e1c2 | 415 | struct i2c_client *client = to_i2c_client(icd->control); |
f523dd0d GL |
416 | struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd); |
417 | int data; | |
418 | ||
419 | switch (ctrl->id) { | |
420 | case V4L2_CID_VFLIP: | |
9538e1c2 | 421 | data = reg_read(client, MT9M001_READ_OPTIONS2); |
f523dd0d GL |
422 | if (data < 0) |
423 | return -EIO; | |
424 | ctrl->value = !!(data & 0x8000); | |
425 | break; | |
426 | case V4L2_CID_EXPOSURE_AUTO: | |
427 | ctrl->value = mt9m001->autoexposure; | |
428 | break; | |
429 | } | |
430 | return 0; | |
431 | } | |
432 | ||
433 | static int mt9m001_set_control(struct soc_camera_device *icd, struct v4l2_control *ctrl) | |
434 | { | |
9538e1c2 | 435 | struct i2c_client *client = to_i2c_client(icd->control); |
f523dd0d GL |
436 | struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd); |
437 | const struct v4l2_queryctrl *qctrl; | |
438 | int data; | |
439 | ||
440 | qctrl = soc_camera_find_qctrl(&mt9m001_ops, ctrl->id); | |
441 | ||
442 | if (!qctrl) | |
443 | return -EINVAL; | |
444 | ||
445 | switch (ctrl->id) { | |
446 | case V4L2_CID_VFLIP: | |
447 | if (ctrl->value) | |
9538e1c2 | 448 | data = reg_set(client, MT9M001_READ_OPTIONS2, 0x8000); |
f523dd0d | 449 | else |
9538e1c2 | 450 | data = reg_clear(client, MT9M001_READ_OPTIONS2, 0x8000); |
f523dd0d GL |
451 | if (data < 0) |
452 | return -EIO; | |
453 | break; | |
454 | case V4L2_CID_GAIN: | |
455 | if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum) | |
456 | return -EINVAL; | |
457 | /* See Datasheet Table 7, Gain settings. */ | |
458 | if (ctrl->value <= qctrl->default_value) { | |
459 | /* Pack it into 0..1 step 0.125, register values 0..8 */ | |
460 | unsigned long range = qctrl->default_value - qctrl->minimum; | |
461 | data = ((ctrl->value - qctrl->minimum) * 8 + range / 2) / range; | |
462 | ||
463 | dev_dbg(&icd->dev, "Setting gain %d\n", data); | |
9538e1c2 | 464 | data = reg_write(client, MT9M001_GLOBAL_GAIN, data); |
f523dd0d GL |
465 | if (data < 0) |
466 | return -EIO; | |
467 | } else { | |
468 | /* Pack it into 1.125..15 variable step, register values 9..67 */ | |
469 | /* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */ | |
470 | unsigned long range = qctrl->maximum - qctrl->default_value - 1; | |
471 | unsigned long gain = ((ctrl->value - qctrl->default_value - 1) * | |
472 | 111 + range / 2) / range + 9; | |
473 | ||
474 | if (gain <= 32) | |
475 | data = gain; | |
476 | else if (gain <= 64) | |
477 | data = ((gain - 32) * 16 + 16) / 32 + 80; | |
478 | else | |
479 | data = ((gain - 64) * 7 + 28) / 56 + 96; | |
480 | ||
481 | dev_dbg(&icd->dev, "Setting gain from %d to %d\n", | |
9538e1c2 GL |
482 | reg_read(client, MT9M001_GLOBAL_GAIN), data); |
483 | data = reg_write(client, MT9M001_GLOBAL_GAIN, data); | |
f523dd0d GL |
484 | if (data < 0) |
485 | return -EIO; | |
486 | } | |
487 | ||
488 | /* Success */ | |
489 | icd->gain = ctrl->value; | |
490 | break; | |
491 | case V4L2_CID_EXPOSURE: | |
492 | /* mt9m001 has maximum == default */ | |
493 | if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum) | |
494 | return -EINVAL; | |
495 | else { | |
496 | unsigned long range = qctrl->maximum - qctrl->minimum; | |
497 | unsigned long shutter = ((ctrl->value - qctrl->minimum) * 1048 + | |
498 | range / 2) / range + 1; | |
499 | ||
500 | dev_dbg(&icd->dev, "Setting shutter width from %d to %lu\n", | |
9538e1c2 GL |
501 | reg_read(client, MT9M001_SHUTTER_WIDTH), shutter); |
502 | if (reg_write(client, MT9M001_SHUTTER_WIDTH, shutter) < 0) | |
f523dd0d GL |
503 | return -EIO; |
504 | icd->exposure = ctrl->value; | |
505 | mt9m001->autoexposure = 0; | |
506 | } | |
507 | break; | |
508 | case V4L2_CID_EXPOSURE_AUTO: | |
509 | if (ctrl->value) { | |
510 | const u16 vblank = 25; | |
9538e1c2 | 511 | if (reg_write(client, MT9M001_SHUTTER_WIDTH, icd->height + |
f523dd0d GL |
512 | icd->y_skip_top + vblank) < 0) |
513 | return -EIO; | |
514 | qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE); | |
515 | icd->exposure = (524 + (icd->height + icd->y_skip_top + vblank - 1) * | |
516 | (qctrl->maximum - qctrl->minimum)) / | |
517 | 1048 + qctrl->minimum; | |
518 | mt9m001->autoexposure = 1; | |
519 | } else | |
520 | mt9m001->autoexposure = 0; | |
521 | break; | |
522 | } | |
523 | return 0; | |
524 | } | |
525 | ||
526 | /* Interface active, can use i2c. If it fails, it can indeed mean, that | |
527 | * this wasn't our capture interface, so, we wait for the right one */ | |
528 | static int mt9m001_video_probe(struct soc_camera_device *icd) | |
529 | { | |
9538e1c2 | 530 | struct i2c_client *client = to_i2c_client(icd->control); |
f523dd0d | 531 | struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd); |
9538e1c2 | 532 | struct soc_camera_link *icl = client->dev.platform_data; |
f523dd0d GL |
533 | s32 data; |
534 | int ret; | |
36034dc3 | 535 | unsigned long flags; |
f523dd0d GL |
536 | |
537 | /* We must have a parent by now. And it cannot be a wrong one. | |
538 | * So this entire test is completely redundant. */ | |
539 | if (!icd->dev.parent || | |
540 | to_soc_camera_host(icd->dev.parent)->nr != icd->iface) | |
541 | return -ENODEV; | |
542 | ||
543 | /* Enable the chip */ | |
9538e1c2 | 544 | data = reg_write(client, MT9M001_CHIP_ENABLE, 1); |
f523dd0d GL |
545 | dev_dbg(&icd->dev, "write: %d\n", data); |
546 | ||
547 | /* Read out the chip version register */ | |
9538e1c2 | 548 | data = reg_read(client, MT9M001_CHIP_VERSION); |
f523dd0d GL |
549 | |
550 | /* must be 0x8411 or 0x8421 for colour sensor and 8431 for bw */ | |
551 | switch (data) { | |
552 | case 0x8411: | |
553 | case 0x8421: | |
554 | mt9m001->model = V4L2_IDENT_MT9M001C12ST; | |
26f1b942 | 555 | icd->formats = mt9m001_colour_formats; |
f523dd0d GL |
556 | break; |
557 | case 0x8431: | |
558 | mt9m001->model = V4L2_IDENT_MT9M001C12STM; | |
26f1b942 | 559 | icd->formats = mt9m001_monochrome_formats; |
f523dd0d GL |
560 | break; |
561 | default: | |
562 | ret = -ENODEV; | |
563 | dev_err(&icd->dev, | |
564 | "No MT9M001 chip detected, register read %x\n", data); | |
565 | goto ei2c; | |
566 | } | |
567 | ||
36034dc3 SH |
568 | icd->num_formats = 0; |
569 | ||
570 | /* | |
571 | * This is a 10bit sensor, so by default we only allow 10bit. | |
572 | * The platform may support different bus widths due to | |
573 | * different routing of the data lines. | |
574 | */ | |
575 | if (icl->query_bus_param) | |
576 | flags = icl->query_bus_param(icl); | |
577 | else | |
578 | flags = SOCAM_DATAWIDTH_10; | |
579 | ||
580 | if (flags & SOCAM_DATAWIDTH_10) | |
581 | icd->num_formats++; | |
582 | else | |
583 | icd->formats++; | |
584 | ||
585 | if (flags & SOCAM_DATAWIDTH_8) | |
586 | icd->num_formats++; | |
587 | ||
f523dd0d GL |
588 | dev_info(&icd->dev, "Detected a MT9M001 chip ID %x (%s)\n", data, |
589 | data == 0x8431 ? "C12STM" : "C12ST"); | |
590 | ||
591 | /* Now that we know the model, we can start video */ | |
592 | ret = soc_camera_video_start(icd); | |
593 | if (ret) | |
594 | goto eisis; | |
595 | ||
596 | return 0; | |
597 | ||
598 | eisis: | |
599 | ei2c: | |
600 | return ret; | |
601 | } | |
602 | ||
603 | static void mt9m001_video_remove(struct soc_camera_device *icd) | |
604 | { | |
605 | struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd); | |
594bb46d | 606 | struct soc_camera_link *icl = mt9m001->client->dev.platform_data; |
f523dd0d GL |
607 | |
608 | dev_dbg(&icd->dev, "Video %x removed: %p, %p\n", mt9m001->client->addr, | |
a85bdace GL |
609 | icd->dev.parent, icd->vdev); |
610 | soc_camera_video_stop(icd); | |
594bb46d GL |
611 | if (icl->free_bus) |
612 | icl->free_bus(icl); | |
f523dd0d GL |
613 | } |
614 | ||
d2653e92 JD |
615 | static int mt9m001_probe(struct i2c_client *client, |
616 | const struct i2c_device_id *did) | |
f523dd0d GL |
617 | { |
618 | struct mt9m001 *mt9m001; | |
619 | struct soc_camera_device *icd; | |
620 | struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); | |
621 | struct soc_camera_link *icl = client->dev.platform_data; | |
622 | int ret; | |
623 | ||
624 | if (!icl) { | |
625 | dev_err(&client->dev, "MT9M001 driver needs platform data\n"); | |
626 | return -EINVAL; | |
627 | } | |
628 | ||
629 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) { | |
630 | dev_warn(&adapter->dev, | |
631 | "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n"); | |
632 | return -EIO; | |
633 | } | |
634 | ||
635 | mt9m001 = kzalloc(sizeof(struct mt9m001), GFP_KERNEL); | |
636 | if (!mt9m001) | |
637 | return -ENOMEM; | |
638 | ||
639 | mt9m001->client = client; | |
640 | i2c_set_clientdata(client, mt9m001); | |
641 | ||
642 | /* Second stage probe - when a capture adapter is there */ | |
643 | icd = &mt9m001->icd; | |
f523dd0d GL |
644 | icd->ops = &mt9m001_ops; |
645 | icd->control = &client->dev; | |
646 | icd->x_min = 20; | |
647 | icd->y_min = 12; | |
648 | icd->x_current = 20; | |
649 | icd->y_current = 12; | |
650 | icd->width_min = 48; | |
651 | icd->width_max = 1280; | |
652 | icd->height_min = 32; | |
653 | icd->height_max = 1024; | |
654 | icd->y_skip_top = 1; | |
655 | icd->iface = icl->bus_id; | |
f523dd0d GL |
656 | /* Simulated autoexposure. If enabled, we calculate shutter width |
657 | * ourselves in the driver based on vertical blanking and frame width */ | |
658 | mt9m001->autoexposure = 1; | |
659 | ||
f523dd0d GL |
660 | ret = soc_camera_device_register(icd); |
661 | if (ret) | |
662 | goto eisdr; | |
663 | ||
664 | return 0; | |
665 | ||
666 | eisdr: | |
f523dd0d GL |
667 | kfree(mt9m001); |
668 | return ret; | |
669 | } | |
670 | ||
671 | static int mt9m001_remove(struct i2c_client *client) | |
672 | { | |
673 | struct mt9m001 *mt9m001 = i2c_get_clientdata(client); | |
674 | ||
675 | soc_camera_device_unregister(&mt9m001->icd); | |
f523dd0d GL |
676 | kfree(mt9m001); |
677 | ||
678 | return 0; | |
679 | } | |
680 | ||
3760f736 JD |
681 | static const struct i2c_device_id mt9m001_id[] = { |
682 | { "mt9m001", 0 }, | |
683 | { } | |
684 | }; | |
685 | MODULE_DEVICE_TABLE(i2c, mt9m001_id); | |
686 | ||
f523dd0d GL |
687 | static struct i2c_driver mt9m001_i2c_driver = { |
688 | .driver = { | |
689 | .name = "mt9m001", | |
690 | }, | |
691 | .probe = mt9m001_probe, | |
692 | .remove = mt9m001_remove, | |
3760f736 | 693 | .id_table = mt9m001_id, |
f523dd0d GL |
694 | }; |
695 | ||
696 | static int __init mt9m001_mod_init(void) | |
697 | { | |
698 | return i2c_add_driver(&mt9m001_i2c_driver); | |
699 | } | |
700 | ||
701 | static void __exit mt9m001_mod_exit(void) | |
702 | { | |
703 | i2c_del_driver(&mt9m001_i2c_driver); | |
704 | } | |
705 | ||
706 | module_init(mt9m001_mod_init); | |
707 | module_exit(mt9m001_mod_exit); | |
708 | ||
709 | MODULE_DESCRIPTION("Micron MT9M001 Camera driver"); | |
710 | MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>"); | |
711 | MODULE_LICENSE("GPL"); |