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V4L/DVB (12509): sh: prepare board-ap325rxa.c for v4l2-subdev conversion
[deliverable/linux.git] / drivers / media / video / mt9m001.c
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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
42static 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
58static 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
71struct mt9m001 {
f523dd0d 72 int model; /* V4L2_IDENT_MT9M001* codes from v4l2-chip-ident.h */
f523dd0d 73 unsigned char autoexposure;
f523dd0d
GL		 74};
75
9538e1c2 76static int reg_read(struct i2c_client *client, const u8 reg)
f523dd0d 77{
f523dd0d
GL		 78 s32 data = i2c_smbus_read_word_data(client, reg);
79 return data < 0 ? data : swab16(data);
80}
81
9538e1c2 82static int reg_write(struct i2c_client *client, const u8 reg,
f523dd0d
GL		 83 const u16 data)
84{
9538e1c2 85 return i2c_smbus_write_word_data(client, reg, swab16(data));
f523dd0d
GL		 86}
87
9538e1c2 88static int reg_set(struct i2c_client *client, const u8 reg,
f523dd0d
GL		 89 const u16 data)
90{
91 int ret;
92
9538e1c2 93 ret = reg_read(client, reg);
f523dd0d
GL		 94 if (ret < 0)
95 return ret;
9538e1c2 96 return reg_write(client, reg, ret | data);
f523dd0d
GL		 97}
98
9538e1c2 99static int reg_clear(struct i2c_client *client, const u8 reg,
f523dd0d
GL		 100 const u16 data)
101{
102 int ret;
103
9538e1c2 104 ret = reg_read(client, reg);
f523dd0d
GL		 105 if (ret < 0)
106 return ret;
9538e1c2 107 return reg_write(client, reg, ret & ~data);
f523dd0d
GL		 108}
109
110static int mt9m001_init(struct soc_camera_device *icd)
111{
40e2e092
GL		 112 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
113 struct soc_camera_link *icl = to_soc_camera_link(icd);
f523dd0d
GL		 114 int ret;
115
40e2e092 116 dev_dbg(&icd->dev, "%s\n", __func__);
f523dd0d 117
81034663 118 if (icl->power) {
9538e1c2 119 ret = icl->power(&client->dev, 1);
81034663
SH		 120 if (ret < 0) {
121 dev_err(icd->vdev->parent,
122 "Platform failed to power-on the camera.\n");
123 return ret;
124 }
125 }
126
127 /* The camera could have been already on, we reset it additionally */
128 if (icl->reset)
9538e1c2 129 ret = icl->reset(&client->dev);
81034663
SH		 130 else
131 ret = -ENODEV;
132
133 if (ret < 0) {
134 /* Either no platform reset, or platform reset failed */
9538e1c2 135 ret = reg_write(client, MT9M001_RESET, 1);
81034663 136 if (!ret)
9538e1c2 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
146static int mt9m001_release(struct soc_camera_device *icd)
147{
40e2e092
GL		 148 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
149 struct soc_camera_link *icl = to_soc_camera_link(icd);
81034663 150
f523dd0d 151 /* Disable the chip */
9538e1c2 152 reg_write(client, MT9M001_OUTPUT_CONTROL, 0);
81034663
SH		 153
154 if (icl->power)
9538e1c2 155 icl->power(&client->dev, 0);
81034663 156
f523dd0d
GL		 157 return 0;
158}
159
160static int mt9m001_start_capture(struct soc_camera_device *icd)
161{
40e2e092 162 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
9538e1c2 163
f523dd0d 164 /* Switch to master "normal" mode */
9538e1c2 165 if (reg_write(client, MT9M001_OUTPUT_CONTROL, 2) < 0)
f523dd0d
GL		 166 return -EIO;
167 return 0;
168}
169
170static int mt9m001_stop_capture(struct soc_camera_device *icd)
171{
40e2e092 172 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
9538e1c2 173
f523dd0d 174 /* Stop sensor readout */
9538e1c2 175 if (reg_write(client, MT9M001_OUTPUT_CONTROL, 0) < 0)
f523dd0d
GL		 176 return -EIO;
177 return 0;
178}
179
ad5f2e85
GL		 180static int mt9m001_set_bus_param(struct soc_camera_device *icd,
181 unsigned long flags)
f523dd0d 182{
40e2e092 183 struct soc_camera_link *icl = to_soc_camera_link(icd);
36034dc3 184 unsigned long width_flag = flags & SOCAM_DATAWIDTH_MASK;
f523dd0d 185
36034dc3
SH		 186 /* Only one width bit may be set */
187 if (!is_power_of_2(width_flag))
188 return -EINVAL;
f523dd0d 189
36034dc3
SH		 190 if (icl->set_bus_param)
191 return icl->set_bus_param(icl, width_flag);
f523dd0d 192
36034dc3
SH		 193 /*
194 * Without board specific bus width settings we only support the
195 * sensors native bus width
196 */
197 if (width_flag == SOCAM_DATAWIDTH_10)
198 return 0;
f523dd0d 199
36034dc3 200 return -EINVAL;
ad5f2e85
GL		 201}
202
203static unsigned long mt9m001_query_bus_param(struct soc_camera_device *icd)
204{
40e2e092 205 struct soc_camera_link *icl = to_soc_camera_link(icd);
bd73b36f 206 /* MT9M001 has all capture_format parameters fixed */
e951cbf2 207 unsigned long flags = SOCAM_PCLK_SAMPLE_FALLING |
bd73b36f 208 SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_HIGH |
2d9329f3 209 SOCAM_DATA_ACTIVE_HIGH | SOCAM_MASTER;
ad5f2e85 210
36034dc3
SH		 211 if (icl->query_bus_param)
212 flags |= icl->query_bus_param(icl) & SOCAM_DATAWIDTH_MASK;
213 else
214 flags |= SOCAM_DATAWIDTH_10;
ad5f2e85 215
bd73b36f 216 return soc_camera_apply_sensor_flags(icl, flags);
ad5f2e85
GL		 217}
218
09e231b3
GL		 219static int mt9m001_set_crop(struct soc_camera_device *icd,
220 struct v4l2_rect *rect)
ad5f2e85 221{
40e2e092
GL		 222 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
223 struct mt9m001 *mt9m001 = i2c_get_clientdata(client);
ad5f2e85
GL		 224 int ret;
225 const u16 hblank = 9, vblank = 25;
226
f523dd0d 227 /* Blanking and start values - default... */
9538e1c2 228 ret = reg_write(client, MT9M001_HORIZONTAL_BLANKING, hblank);
11211641 229 if (!ret)
9538e1c2 230 ret = reg_write(client, MT9M001_VERTICAL_BLANKING, vblank);
f523dd0d
GL		 231
232 /* The caller provides a supported format, as verified per
d8fac217 233 * call to icd->try_fmt() */
11211641 234 if (!ret)
9538e1c2 235 ret = reg_write(client, MT9M001_COLUMN_START, rect->left);
11211641 236 if (!ret)
9538e1c2 237 ret = reg_write(client, MT9M001_ROW_START, rect->top);
11211641 238 if (!ret)
9538e1c2 239 ret = reg_write(client, MT9M001_WINDOW_WIDTH, rect->width - 1);
11211641 240 if (!ret)
9538e1c2 241 ret = reg_write(client, MT9M001_WINDOW_HEIGHT,
f523dd0d 242 rect->height + icd->y_skip_top - 1);
11211641 243 if (!ret && mt9m001->autoexposure) {
9538e1c2 244 ret = reg_write(client, MT9M001_SHUTTER_WIDTH,
f523dd0d 245 rect->height + icd->y_skip_top + vblank);
11211641 246 if (!ret) {
f523dd0d
GL		 247 const struct v4l2_queryctrl *qctrl =
248 soc_camera_find_qctrl(icd->ops,
249 V4L2_CID_EXPOSURE);
250 icd->exposure = (524 + (rect->height + icd->y_skip_top +
251 vblank - 1) *
252 (qctrl->maximum - qctrl->minimum)) /
253 1048 + qctrl->minimum;
254 }
255 }
256
11211641 257 return ret;
f523dd0d
GL		 258}
259
09e231b3
GL		 260static int mt9m001_set_fmt(struct soc_camera_device *icd,
261 struct v4l2_format *f)
262{
263 struct v4l2_rect rect = {
264 .left = icd->x_current,
265 .top = icd->y_current,
266 .width = f->fmt.pix.width,
267 .height = f->fmt.pix.height,
268 };
269
270 /* No support for scaling so far, just crop. TODO: use skipping */
271 return mt9m001_set_crop(icd, &rect);
272}
273
d8fac217
GL		 274static int mt9m001_try_fmt(struct soc_camera_device *icd,
275 struct v4l2_format *f)
f523dd0d 276{
64f5905e
GL		 277 struct v4l2_pix_format *pix = &f->fmt.pix;
278
653dc59b
TP		 279 v4l_bound_align_image(&pix->width, 48, 1280, 1,
280 &pix->height, 32 + icd->y_skip_top,
281 1024 + icd->y_skip_top, 0, 0);
f523dd0d
GL		 282
283 return 0;
284}
285
286static int mt9m001_get_chip_id(struct soc_camera_device *icd,
aecde8b5 287 struct v4l2_dbg_chip_ident *id)
f523dd0d 288{
40e2e092
GL		 289 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
290 struct mt9m001 *mt9m001 = i2c_get_clientdata(client);
f523dd0d 291
aecde8b5 292 if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
f523dd0d
GL		 293 return -EINVAL;
294
40e2e092 295 if (id->match.addr != client->addr)
f523dd0d
GL		 296 return -ENODEV;
297
298 id->ident = mt9m001->model;
299 id->revision = 0;
300
301 return 0;
302}
303
304#ifdef CONFIG_VIDEO_ADV_DEBUG
305static int mt9m001_get_register(struct soc_camera_device *icd,
aecde8b5 306 struct v4l2_dbg_register *reg)
f523dd0d 307{
40e2e092 308 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
f523dd0d 309
aecde8b5 310 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
f523dd0d
GL		 311 return -EINVAL;
312
9538e1c2 313 if (reg->match.addr != client->addr)
f523dd0d
GL		 314 return -ENODEV;
315
aecde8b5 316 reg->size = 2;
9538e1c2 317 reg->val = reg_read(client, reg->reg);
f523dd0d
GL		 318
319 if (reg->val > 0xffff)
320 return -EIO;
321
322 return 0;
323}
324
325static int mt9m001_set_register(struct soc_camera_device *icd,
aecde8b5 326 struct v4l2_dbg_register *reg)
f523dd0d 327{
40e2e092 328 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
f523dd0d 329
aecde8b5 330 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
f523dd0d
GL		 331 return -EINVAL;
332
9538e1c2 333 if (reg->match.addr != client->addr)
f523dd0d
GL		 334 return -ENODEV;
335
9538e1c2 336 if (reg_write(client, reg->reg, reg->val) < 0)
f523dd0d
GL		 337 return -EIO;
338
339 return 0;
340}
341#endif
342
4407a463 343static const struct v4l2_queryctrl mt9m001_controls[] = {
f523dd0d
GL		 344 {
345 .id = V4L2_CID_VFLIP,
346 .type = V4L2_CTRL_TYPE_BOOLEAN,
347 .name = "Flip Vertically",
348 .minimum = 0,
349 .maximum = 1,
350 .step = 1,
351 .default_value = 0,
352 }, {
353 .id = V4L2_CID_GAIN,
354 .type = V4L2_CTRL_TYPE_INTEGER,
355 .name = "Gain",
356 .minimum = 0,
357 .maximum = 127,
358 .step = 1,
359 .default_value = 64,
360 .flags = V4L2_CTRL_FLAG_SLIDER,
361 }, {
362 .id = V4L2_CID_EXPOSURE,
363 .type = V4L2_CTRL_TYPE_INTEGER,
364 .name = "Exposure",
365 .minimum = 1,
366 .maximum = 255,
367 .step = 1,
368 .default_value = 255,
369 .flags = V4L2_CTRL_FLAG_SLIDER,
370 }, {
371 .id = V4L2_CID_EXPOSURE_AUTO,
372 .type = V4L2_CTRL_TYPE_BOOLEAN,
373 .name = "Automatic Exposure",
374 .minimum = 0,
375 .maximum = 1,
376 .step = 1,
377 .default_value = 1,
378 }
379};
380
26f1b942
GL		 381static int mt9m001_get_control(struct soc_camera_device *, struct v4l2_control *);
382static int mt9m001_set_control(struct soc_camera_device *, struct v4l2_control *);
f523dd0d
GL		 383
384static struct soc_camera_ops mt9m001_ops = {
385 .owner = THIS_MODULE,
386 .init = mt9m001_init,
387 .release = mt9m001_release,
388 .start_capture = mt9m001_start_capture,
389 .stop_capture = mt9m001_stop_capture,
09e231b3 390 .set_crop = mt9m001_set_crop,
d8fac217
GL		 391 .set_fmt = mt9m001_set_fmt,
392 .try_fmt = mt9m001_try_fmt,
ad5f2e85
GL		 393 .set_bus_param = mt9m001_set_bus_param,
394 .query_bus_param = mt9m001_query_bus_param,
f523dd0d
GL		 395 .controls = mt9m001_controls,
396 .num_controls = ARRAY_SIZE(mt9m001_controls),
397 .get_control = mt9m001_get_control,
398 .set_control = mt9m001_set_control,
399 .get_chip_id = mt9m001_get_chip_id,
400#ifdef CONFIG_VIDEO_ADV_DEBUG
401 .get_register = mt9m001_get_register,
402 .set_register = mt9m001_set_register,
403#endif
404};
405
406static int mt9m001_get_control(struct soc_camera_device *icd, struct v4l2_control *ctrl)
407{
40e2e092
GL		 408 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
409 struct mt9m001 *mt9m001 = i2c_get_clientdata(client);
f523dd0d
GL		 410 int data;
411
412 switch (ctrl->id) {
413 case V4L2_CID_VFLIP:
9538e1c2 414 data = reg_read(client, MT9M001_READ_OPTIONS2);
f523dd0d
GL		 415 if (data < 0)
416 return -EIO;
417 ctrl->value = !!(data & 0x8000);
418 break;
419 case V4L2_CID_EXPOSURE_AUTO:
420 ctrl->value = mt9m001->autoexposure;
421 break;
422 }
423 return 0;
424}
425
426static int mt9m001_set_control(struct soc_camera_device *icd, struct v4l2_control *ctrl)
427{
40e2e092
GL		 428 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
429 struct mt9m001 *mt9m001 = i2c_get_clientdata(client);
f523dd0d
GL		 430 const struct v4l2_queryctrl *qctrl;
431 int data;
432
433 qctrl = soc_camera_find_qctrl(&mt9m001_ops, ctrl->id);
434
435 if (!qctrl)
436 return -EINVAL;
437
438 switch (ctrl->id) {
439 case V4L2_CID_VFLIP:
440 if (ctrl->value)
9538e1c2 441 data = reg_set(client, MT9M001_READ_OPTIONS2, 0x8000);
f523dd0d 442 else
9538e1c2 443 data = reg_clear(client, MT9M001_READ_OPTIONS2, 0x8000);
f523dd0d
GL		 444 if (data < 0)
445 return -EIO;
446 break;
447 case V4L2_CID_GAIN:
448 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
449 return -EINVAL;
450 /* See Datasheet Table 7, Gain settings. */
451 if (ctrl->value <= qctrl->default_value) {
452 /* Pack it into 0..1 step 0.125, register values 0..8 */
453 unsigned long range = qctrl->default_value - qctrl->minimum;
454 data = ((ctrl->value - qctrl->minimum) * 8 + range / 2) / range;
455
456 dev_dbg(&icd->dev, "Setting gain %d\n", data);
9538e1c2 457 data = reg_write(client, MT9M001_GLOBAL_GAIN, data);
f523dd0d
GL		 458 if (data < 0)
459 return -EIO;
460 } else {
461 /* Pack it into 1.125..15 variable step, register values 9..67 */
462 /* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */
463 unsigned long range = qctrl->maximum - qctrl->default_value - 1;
464 unsigned long gain = ((ctrl->value - qctrl->default_value - 1) *
465 111 + range / 2) / range + 9;
466
467 if (gain <= 32)
468 data = gain;
469 else if (gain <= 64)
470 data = ((gain - 32) * 16 + 16) / 32 + 80;
471 else
472 data = ((gain - 64) * 7 + 28) / 56 + 96;
473
474 dev_dbg(&icd->dev, "Setting gain from %d to %d\n",
9538e1c2
GL		 475 reg_read(client, MT9M001_GLOBAL_GAIN), data);
476 data = reg_write(client, MT9M001_GLOBAL_GAIN, data);
f523dd0d
GL		 477 if (data < 0)
478 return -EIO;
479 }
480
481 /* Success */
482 icd->gain = ctrl->value;
483 break;
484 case V4L2_CID_EXPOSURE:
485 /* mt9m001 has maximum == default */
486 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
487 return -EINVAL;
488 else {
489 unsigned long range = qctrl->maximum - qctrl->minimum;
490 unsigned long shutter = ((ctrl->value - qctrl->minimum) * 1048 +
491 range / 2) / range + 1;
492
493 dev_dbg(&icd->dev, "Setting shutter width from %d to %lu\n",
9538e1c2
GL		 494 reg_read(client, MT9M001_SHUTTER_WIDTH), shutter);
495 if (reg_write(client, MT9M001_SHUTTER_WIDTH, shutter) < 0)
f523dd0d
GL		 496 return -EIO;
497 icd->exposure = ctrl->value;
498 mt9m001->autoexposure = 0;
499 }
500 break;
501 case V4L2_CID_EXPOSURE_AUTO:
502 if (ctrl->value) {
503 const u16 vblank = 25;
9538e1c2 504 if (reg_write(client, MT9M001_SHUTTER_WIDTH, icd->height +
f523dd0d
GL		 505 icd->y_skip_top + vblank) < 0)
506 return -EIO;
507 qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE);
508 icd->exposure = (524 + (icd->height + icd->y_skip_top + vblank - 1) *
509 (qctrl->maximum - qctrl->minimum)) /
510 1048 + qctrl->minimum;
511 mt9m001->autoexposure = 1;
512 } else
513 mt9m001->autoexposure = 0;
514 break;
515 }
516 return 0;
517}
518
519/* Interface active, can use i2c. If it fails, it can indeed mean, that
520 * this wasn't our capture interface, so, we wait for the right one */
40e2e092
GL		 521static int mt9m001_video_probe(struct soc_camera_device *icd,
522 struct i2c_client *client)
f523dd0d 523{
40e2e092
GL		 524 struct mt9m001 *mt9m001 = i2c_get_clientdata(client);
525 struct soc_camera_link *icl = to_soc_camera_link(icd);
f523dd0d
GL		 526 s32 data;
527 int ret;
36034dc3 528 unsigned long flags;
f523dd0d
GL		 529
530 /* We must have a parent by now. And it cannot be a wrong one.
531 * So this entire test is completely redundant. */
532 if (!icd->dev.parent ||
533 to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
534 return -ENODEV;
535
40e2e092
GL		 536 /* Switch master clock on */
537 ret = soc_camera_video_start(icd, &client->dev);
538 if (ret)
539 return ret;
540
f523dd0d 541 /* Enable the chip */
9538e1c2 542 data = reg_write(client, MT9M001_CHIP_ENABLE, 1);
f523dd0d
GL		 543 dev_dbg(&icd->dev, "write: %d\n", data);
544
545 /* Read out the chip version register */
9538e1c2 546 data = reg_read(client, MT9M001_CHIP_VERSION);
f523dd0d 547
40e2e092
GL		 548 soc_camera_video_stop(icd);
549
f523dd0d
GL		 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:
f523dd0d
GL		 562 dev_err(&icd->dev,
563 "No MT9M001 chip detected, register read %x\n", data);
40e2e092 564 return -ENODEV;
f523dd0d
GL		 565 }
566
36034dc3
SH		 567 icd->num_formats = 0;
568
569 /*
570 * This is a 10bit sensor, so by default we only allow 10bit.
571 * The platform may support different bus widths due to
572 * different routing of the data lines.
573 */
574 if (icl->query_bus_param)
575 flags = icl->query_bus_param(icl);
576 else
577 flags = SOCAM_DATAWIDTH_10;
578
579 if (flags & SOCAM_DATAWIDTH_10)
580 icd->num_formats++;
581 else
582 icd->formats++;
583
584 if (flags & SOCAM_DATAWIDTH_8)
585 icd->num_formats++;
586
f523dd0d
GL		 587 dev_info(&icd->dev, "Detected a MT9M001 chip ID %x (%s)\n", data,
588 data == 0x8431 ? "C12STM" : "C12ST");
589
f523dd0d 590 return 0;
f523dd0d
GL		 591}
592
593static void mt9m001_video_remove(struct soc_camera_device *icd)
594{
40e2e092
GL		 595 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
596 struct soc_camera_link *icl = to_soc_camera_link(icd);
f523dd0d 597
40e2e092 598 dev_dbg(&icd->dev, "Video %x removed: %p, %p\n", client->addr,
a85bdace 599 icd->dev.parent, icd->vdev);
594bb46d
GL		 600 if (icl->free_bus)
601 icl->free_bus(icl);
f523dd0d
GL		 602}
603
d2653e92
JD		 604static int mt9m001_probe(struct i2c_client *client,
605 const struct i2c_device_id *did)
f523dd0d
GL		 606{
607 struct mt9m001 *mt9m001;
40e2e092 608 struct soc_camera_device *icd = client->dev.platform_data;
f523dd0d 609 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
40e2e092 610 struct soc_camera_link *icl;
f523dd0d
GL		 611 int ret;
612
40e2e092
GL		 613 if (!icd) {
614 dev_err(&client->dev, "MT9M001: missing soc-camera data!\n");
615 return -EINVAL;
616 }
617
618 icl = to_soc_camera_link(icd);
f523dd0d
GL		 619 if (!icl) {
620 dev_err(&client->dev, "MT9M001 driver needs platform data\n");
621 return -EINVAL;
622 }
623
624 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
625 dev_warn(&adapter->dev,
626 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
627 return -EIO;
628 }
629
630 mt9m001 = kzalloc(sizeof(struct mt9m001), GFP_KERNEL);
631 if (!mt9m001)
632 return -ENOMEM;
633
f523dd0d
GL		 634 i2c_set_clientdata(client, mt9m001);
635
636 /* Second stage probe - when a capture adapter is there */
f523dd0d 637 icd->ops = &mt9m001_ops;
f523dd0d
GL		 638 icd->x_min = 20;
639 icd->y_min = 12;
640 icd->x_current = 20;
641 icd->y_current = 12;
642 icd->width_min = 48;
643 icd->width_max = 1280;
644 icd->height_min = 32;
645 icd->height_max = 1024;
646 icd->y_skip_top = 1;
f523dd0d
GL		 647 /* Simulated autoexposure. If enabled, we calculate shutter width
648 * ourselves in the driver based on vertical blanking and frame width */
649 mt9m001->autoexposure = 1;
650
40e2e092
GL		 651 ret = mt9m001_video_probe(icd, client);
652 if (ret) {
653 icd->ops = NULL;
654 i2c_set_clientdata(client, NULL);
655 kfree(mt9m001);
656 }
f523dd0d 657
f523dd0d
GL		 658 return ret;
659}
660
661static int mt9m001_remove(struct i2c_client *client)
662{
663 struct mt9m001 *mt9m001 = i2c_get_clientdata(client);
40e2e092 664 struct soc_camera_device *icd = client->dev.platform_data;
f523dd0d 665
40e2e092
GL		 666 icd->ops = NULL;
667 mt9m001_video_remove(icd);
668 i2c_set_clientdata(client, NULL);
669 client->driver = NULL;
f523dd0d
GL		 670 kfree(mt9m001);
671
672 return 0;
673}
674
3760f736
JD		 675static const struct i2c_device_id mt9m001_id[] = {
676 { "mt9m001", 0 },
677 { }
678};
679MODULE_DEVICE_TABLE(i2c, mt9m001_id);
680
f523dd0d
GL		 681static struct i2c_driver mt9m001_i2c_driver = {
682 .driver = {
683 .name = "mt9m001",
684 },
685 .probe = mt9m001_probe,
686 .remove = mt9m001_remove,
3760f736 687 .id_table = mt9m001_id,
f523dd0d
GL		 688};
689
690static int __init mt9m001_mod_init(void)
691{
692 return i2c_add_driver(&mt9m001_i2c_driver);
693}
694
695static void __exit mt9m001_mod_exit(void)
696{
697 i2c_del_driver(&mt9m001_i2c_driver);
698}
699
700module_init(mt9m001_mod_init);
701module_exit(mt9m001_mod_exit);
702
703MODULE_DESCRIPTION("Micron MT9M001 Camera driver");
704MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
705MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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