projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
V4L/DVB (10065): mt9m111: add all yuv format combinations.
[deliverable/linux.git] / drivers / media / video / mt9m001.c
CommitLineData
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>
91e64c88 15#include <linux/gpio.h>
f523dd0d
GL		 16
17#include <media/v4l2-common.h>
18#include <media/v4l2-chip-ident.h>
19#include <media/soc_camera.h>
20
f523dd0d
GL		 21/* mt9m001 i2c address 0x5d
22 * The platform has to define i2c_board_info
23 * and call i2c_register_board_info() */
24
25/* mt9m001 selected register addresses */
26#define MT9M001_CHIP_VERSION 0x00
27#define MT9M001_ROW_START 0x01
28#define MT9M001_COLUMN_START 0x02
29#define MT9M001_WINDOW_HEIGHT 0x03
30#define MT9M001_WINDOW_WIDTH 0x04
31#define MT9M001_HORIZONTAL_BLANKING 0x05
32#define MT9M001_VERTICAL_BLANKING 0x06
33#define MT9M001_OUTPUT_CONTROL 0x07
34#define MT9M001_SHUTTER_WIDTH 0x09
35#define MT9M001_FRAME_RESTART 0x0b
36#define MT9M001_SHUTTER_DELAY 0x0c
37#define MT9M001_RESET 0x0d
38#define MT9M001_READ_OPTIONS1 0x1e
39#define MT9M001_READ_OPTIONS2 0x20
40#define MT9M001_GLOBAL_GAIN 0x35
41#define MT9M001_CHIP_ENABLE 0xF1
42
43static const struct soc_camera_data_format mt9m001_colour_formats[] = {
bb55de3b
GL		 44 /* Order important: first natively supported,
45 * second supported with a GPIO extender */
f523dd0d 46 {
bb55de3b
GL		 47 .name = "Bayer (sRGB) 10 bit",
48 .depth = 10,
49 .fourcc = V4L2_PIX_FMT_SBGGR16,
50 .colorspace = V4L2_COLORSPACE_SRGB,
51 }, {
52 .name = "Bayer (sRGB) 8 bit",
53 .depth = 8,
f523dd0d
GL		 54 .fourcc = V4L2_PIX_FMT_SBGGR8,
55 .colorspace = V4L2_COLORSPACE_SRGB,
56 }
57};
58
59static const struct soc_camera_data_format mt9m001_monochrome_formats[] = {
bb55de3b 60 /* Order important - see above */
f523dd0d
GL		 61 {
62 .name = "Monochrome 10 bit",
63 .depth = 10,
64 .fourcc = V4L2_PIX_FMT_Y16,
65 }, {
66 .name = "Monochrome 8 bit",
67 .depth = 8,
68 .fourcc = V4L2_PIX_FMT_GREY,
69 },
70};
71
72struct mt9m001 {
73 struct i2c_client *client;
74 struct soc_camera_device icd;
75 int model; /* V4L2_IDENT_MT9M001* codes from v4l2-chip-ident.h */
76 int switch_gpio;
77 unsigned char autoexposure;
78 unsigned char datawidth;
79};
80
81static int reg_read(struct soc_camera_device *icd, const u8 reg)
82{
83 struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
84 struct i2c_client *client = mt9m001->client;
85 s32 data = i2c_smbus_read_word_data(client, reg);
86 return data < 0 ? data : swab16(data);
87}
88
89static int reg_write(struct soc_camera_device *icd, const u8 reg,
90 const u16 data)
91{
92 struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
93 return i2c_smbus_write_word_data(mt9m001->client, reg, swab16(data));
94}
95
96static int reg_set(struct soc_camera_device *icd, const u8 reg,
97 const u16 data)
98{
99 int ret;
100
101 ret = reg_read(icd, reg);
102 if (ret < 0)
103 return ret;
104 return reg_write(icd, reg, ret | data);
105}
106
107static int reg_clear(struct soc_camera_device *icd, const u8 reg,
108 const u16 data)
109{
110 int ret;
111
112 ret = reg_read(icd, reg);
113 if (ret < 0)
114 return ret;
115 return reg_write(icd, reg, ret & ~data);
116}
117
118static int mt9m001_init(struct soc_camera_device *icd)
119{
81034663
SH		 120 struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
121 struct soc_camera_link *icl = mt9m001->client->dev.platform_data;
f523dd0d
GL		 122 int ret;
123
5e85e732 124 dev_dbg(icd->vdev->parent, "%s\n", __func__);
f523dd0d 125
81034663
SH		 126 if (icl->power) {
127 ret = icl->power(&mt9m001->client->dev, 1);
128 if (ret < 0) {
129 dev_err(icd->vdev->parent,
130 "Platform failed to power-on the camera.\n");
131 return ret;
132 }
133 }
134
135 /* The camera could have been already on, we reset it additionally */
136 if (icl->reset)
137 ret = icl->reset(&mt9m001->client->dev);
138 else
139 ret = -ENODEV;
140
141 if (ret < 0) {
142 /* Either no platform reset, or platform reset failed */
143 ret = reg_write(icd, MT9M001_RESET, 1);
144 if (!ret)
145 ret = reg_write(icd, MT9M001_RESET, 0);
146 }
11211641
GL		 147 /* Disable chip, synchronous option update */
148 if (!ret)
f523dd0d
GL		 149 ret = reg_write(icd, MT9M001_OUTPUT_CONTROL, 0);
150
11211641 151 return ret;
f523dd0d
GL		 152}
153
154static int mt9m001_release(struct soc_camera_device *icd)
155{
81034663
SH		 156 struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
157 struct soc_camera_link *icl = mt9m001->client->dev.platform_data;
158
f523dd0d
GL		 159 /* Disable the chip */
160 reg_write(icd, MT9M001_OUTPUT_CONTROL, 0);
81034663
SH		 161
162 if (icl->power)
163 icl->power(&mt9m001->client->dev, 0);
164
f523dd0d
GL		 165 return 0;
166}
167
168static int mt9m001_start_capture(struct soc_camera_device *icd)
169{
170 /* Switch to master "normal" mode */
171 if (reg_write(icd, MT9M001_OUTPUT_CONTROL, 2) < 0)
172 return -EIO;
173 return 0;
174}
175
176static int mt9m001_stop_capture(struct soc_camera_device *icd)
177{
178 /* Stop sensor readout */
179 if (reg_write(icd, MT9M001_OUTPUT_CONTROL, 0) < 0)
180 return -EIO;
181 return 0;
182}
183
184static int bus_switch_request(struct mt9m001 *mt9m001,
185 struct soc_camera_link *icl)
186{
187#ifdef CONFIG_MT9M001_PCA9536_SWITCH
188 int ret;
189 unsigned int gpio = icl->gpio;
190
b4333a3b 191 if (gpio_is_valid(gpio)) {
f523dd0d
GL		 192 /* We have a data bus switch. */
193 ret = gpio_request(gpio, "mt9m001");
194 if (ret < 0) {
195 dev_err(&mt9m001->client->dev, "Cannot get GPIO %u\n",
196 gpio);
197 return ret;
198 }
199
200 ret = gpio_direction_output(gpio, 0);
201 if (ret < 0) {
202 dev_err(&mt9m001->client->dev,
203 "Cannot set GPIO %u to output\n", gpio);
204 gpio_free(gpio);
205 return ret;
206 }
207 }
208
209 mt9m001->switch_gpio = gpio;
210#else
b4333a3b 211 mt9m001->switch_gpio = -EINVAL;
f523dd0d
GL		 212#endif
213 return 0;
214}
215
216static void bus_switch_release(struct mt9m001 *mt9m001)
217{
218#ifdef CONFIG_MT9M001_PCA9536_SWITCH
b4333a3b 219 if (gpio_is_valid(mt9m001->switch_gpio))
f523dd0d
GL		 220 gpio_free(mt9m001->switch_gpio);
221#endif
222}
223
224static int bus_switch_act(struct mt9m001 *mt9m001, int go8bit)
225{
226#ifdef CONFIG_MT9M001_PCA9536_SWITCH
b4333a3b 227 if (!gpio_is_valid(mt9m001->switch_gpio))
f523dd0d
GL		 228 return -ENODEV;
229
230 gpio_set_value_cansleep(mt9m001->switch_gpio, go8bit);
231 return 0;
232#else
233 return -ENODEV;
234#endif
235}
236
ad5f2e85
GL		 237static int bus_switch_possible(struct mt9m001 *mt9m001)
238{
239#ifdef CONFIG_MT9M001_PCA9536_SWITCH
240 return gpio_is_valid(mt9m001->switch_gpio);
241#else
242 return 0;
243#endif
244}
245
246static int mt9m001_set_bus_param(struct soc_camera_device *icd,
247 unsigned long flags)
f523dd0d
GL		 248{
249 struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
ad5f2e85 250 unsigned int width_flag = flags & SOCAM_DATAWIDTH_MASK;
f523dd0d 251 int ret;
f523dd0d 252
ad5f2e85 253 /* Flags validity verified in test_bus_param */
f523dd0d 254
ad5f2e85
GL		 255 if ((mt9m001->datawidth != 10 && (width_flag == SOCAM_DATAWIDTH_10)) ||
256 (mt9m001->datawidth != 9 && (width_flag == SOCAM_DATAWIDTH_9)) ||
257 (mt9m001->datawidth != 8 && (width_flag == SOCAM_DATAWIDTH_8))) {
f523dd0d 258 /* Well, we actually only can do 10 or 8 bits... */
ad5f2e85 259 if (width_flag == SOCAM_DATAWIDTH_9)
f523dd0d
GL		 260 return -EINVAL;
261 ret = bus_switch_act(mt9m001,
ad5f2e85 262 width_flag == SOCAM_DATAWIDTH_8);
f523dd0d
GL		 263 if (ret < 0)
264 return ret;
265
ad5f2e85 266 mt9m001->datawidth = width_flag == SOCAM_DATAWIDTH_8 ? 8 : 10;
f523dd0d
GL		 267 }
268
ad5f2e85
GL		 269 return 0;
270}
271
272static unsigned long mt9m001_query_bus_param(struct soc_camera_device *icd)
273{
274 struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
275 unsigned int width_flag = SOCAM_DATAWIDTH_10;
276
277 if (bus_switch_possible(mt9m001))
278 width_flag |= SOCAM_DATAWIDTH_8;
279
280 /* MT9M001 has all capture_format parameters fixed */
281 return SOCAM_PCLK_SAMPLE_RISING |
282 SOCAM_HSYNC_ACTIVE_HIGH |
283 SOCAM_VSYNC_ACTIVE_HIGH |
284 SOCAM_MASTER |
285 width_flag;
286}
287
d8fac217
GL		 288static int mt9m001_set_fmt(struct soc_camera_device *icd,
289 __u32 pixfmt, struct v4l2_rect *rect)
ad5f2e85
GL		 290{
291 struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
292 int ret;
293 const u16 hblank = 9, vblank = 25;
294
f523dd0d
GL		 295 /* Blanking and start values - default... */
296 ret = reg_write(icd, MT9M001_HORIZONTAL_BLANKING, hblank);
11211641 297 if (!ret)
f523dd0d
GL		 298 ret = reg_write(icd, MT9M001_VERTICAL_BLANKING, vblank);
299
300 /* The caller provides a supported format, as verified per
d8fac217 301 * call to icd->try_fmt() */
11211641 302 if (!ret)
f523dd0d 303 ret = reg_write(icd, MT9M001_COLUMN_START, rect->left);
11211641 304 if (!ret)
f523dd0d 305 ret = reg_write(icd, MT9M001_ROW_START, rect->top);
11211641 306 if (!ret)
f523dd0d 307 ret = reg_write(icd, MT9M001_WINDOW_WIDTH, rect->width - 1);
11211641 308 if (!ret)
f523dd0d
GL		 309 ret = reg_write(icd, MT9M001_WINDOW_HEIGHT,
310 rect->height + icd->y_skip_top - 1);
11211641 311 if (!ret && mt9m001->autoexposure) {
f523dd0d
GL		 312 ret = reg_write(icd, MT9M001_SHUTTER_WIDTH,
313 rect->height + icd->y_skip_top + vblank);
11211641 314 if (!ret) {
f523dd0d
GL		 315 const struct v4l2_queryctrl *qctrl =
316 soc_camera_find_qctrl(icd->ops,
317 V4L2_CID_EXPOSURE);
318 icd->exposure = (524 + (rect->height + icd->y_skip_top +
319 vblank - 1) *
320 (qctrl->maximum - qctrl->minimum)) /
321 1048 + qctrl->minimum;
322 }
323 }
324
11211641 325 return ret;
f523dd0d
GL		 326}
327
d8fac217
GL		 328static int mt9m001_try_fmt(struct soc_camera_device *icd,
329 struct v4l2_format *f)
f523dd0d
GL		 330{
331 if (f->fmt.pix.height < 32 + icd->y_skip_top)
332 f->fmt.pix.height = 32 + icd->y_skip_top;
333 if (f->fmt.pix.height > 1024 + icd->y_skip_top)
334 f->fmt.pix.height = 1024 + icd->y_skip_top;
335 if (f->fmt.pix.width < 48)
336 f->fmt.pix.width = 48;
337 if (f->fmt.pix.width > 1280)
338 f->fmt.pix.width = 1280;
339 f->fmt.pix.width &= ~0x01; /* has to be even, unsure why was ~3 */
340
341 return 0;
342}
343
344static int mt9m001_get_chip_id(struct soc_camera_device *icd,
345 struct v4l2_chip_ident *id)
346{
347 struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
348
349 if (id->match_type != V4L2_CHIP_MATCH_I2C_ADDR)
350 return -EINVAL;
351
352 if (id->match_chip != mt9m001->client->addr)
353 return -ENODEV;
354
355 id->ident = mt9m001->model;
356 id->revision = 0;
357
358 return 0;
359}
360
361#ifdef CONFIG_VIDEO_ADV_DEBUG
362static int mt9m001_get_register(struct soc_camera_device *icd,
363 struct v4l2_register *reg)
364{
365 struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
366
367 if (reg->match_type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
368 return -EINVAL;
369
370 if (reg->match_chip != mt9m001->client->addr)
371 return -ENODEV;
372
373 reg->val = reg_read(icd, reg->reg);
374
375 if (reg->val > 0xffff)
376 return -EIO;
377
378 return 0;
379}
380
381static int mt9m001_set_register(struct soc_camera_device *icd,
382 struct v4l2_register *reg)
383{
384 struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
385
386 if (reg->match_type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
387 return -EINVAL;
388
389 if (reg->match_chip != mt9m001->client->addr)
390 return -ENODEV;
391
392 if (reg_write(icd, reg->reg, reg->val) < 0)
393 return -EIO;
394
395 return 0;
396}
397#endif
398
4407a463 399static 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
26f1b942
GL		 437static int mt9m001_video_probe(struct soc_camera_device *);
438static void mt9m001_video_remove(struct soc_camera_device *);
439static int mt9m001_get_control(struct soc_camera_device *, struct v4l2_control *);
440static int mt9m001_set_control(struct soc_camera_device *, struct v4l2_control *);
f523dd0d
GL		 441
442static struct soc_camera_ops mt9m001_ops = {
443 .owner = THIS_MODULE,
26f1b942
GL		 444 .probe = mt9m001_video_probe,
445 .remove = mt9m001_video_remove,
f523dd0d
GL		 446 .init = mt9m001_init,
447 .release = mt9m001_release,
448 .start_capture = mt9m001_start_capture,
449 .stop_capture = mt9m001_stop_capture,
d8fac217
GL		 450 .set_fmt = mt9m001_set_fmt,
451 .try_fmt = mt9m001_try_fmt,
ad5f2e85
GL		 452 .set_bus_param = mt9m001_set_bus_param,
453 .query_bus_param = mt9m001_query_bus_param,
f523dd0d
GL		 454 .controls = mt9m001_controls,
455 .num_controls = ARRAY_SIZE(mt9m001_controls),
456 .get_control = mt9m001_get_control,
457 .set_control = mt9m001_set_control,
458 .get_chip_id = mt9m001_get_chip_id,
459#ifdef CONFIG_VIDEO_ADV_DEBUG
460 .get_register = mt9m001_get_register,
461 .set_register = mt9m001_set_register,
462#endif
463};
464
465static int mt9m001_get_control(struct soc_camera_device *icd, struct v4l2_control *ctrl)
466{
467 struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
468 int data;
469
470 switch (ctrl->id) {
471 case V4L2_CID_VFLIP:
472 data = reg_read(icd, MT9M001_READ_OPTIONS2);
473 if (data < 0)
474 return -EIO;
475 ctrl->value = !!(data & 0x8000);
476 break;
477 case V4L2_CID_EXPOSURE_AUTO:
478 ctrl->value = mt9m001->autoexposure;
479 break;
480 }
481 return 0;
482}
483
484static int mt9m001_set_control(struct soc_camera_device *icd, struct v4l2_control *ctrl)
485{
486 struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
487 const struct v4l2_queryctrl *qctrl;
488 int data;
489
490 qctrl = soc_camera_find_qctrl(&mt9m001_ops, ctrl->id);
491
492 if (!qctrl)
493 return -EINVAL;
494
495 switch (ctrl->id) {
496 case V4L2_CID_VFLIP:
497 if (ctrl->value)
498 data = reg_set(icd, MT9M001_READ_OPTIONS2, 0x8000);
499 else
500 data = reg_clear(icd, MT9M001_READ_OPTIONS2, 0x8000);
501 if (data < 0)
502 return -EIO;
503 break;
504 case V4L2_CID_GAIN:
505 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
506 return -EINVAL;
507 /* See Datasheet Table 7, Gain settings. */
508 if (ctrl->value <= qctrl->default_value) {
509 /* Pack it into 0..1 step 0.125, register values 0..8 */
510 unsigned long range = qctrl->default_value - qctrl->minimum;
511 data = ((ctrl->value - qctrl->minimum) * 8 + range / 2) / range;
512
513 dev_dbg(&icd->dev, "Setting gain %d\n", data);
514 data = reg_write(icd, MT9M001_GLOBAL_GAIN, data);
515 if (data < 0)
516 return -EIO;
517 } else {
518 /* Pack it into 1.125..15 variable step, register values 9..67 */
519 /* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */
520 unsigned long range = qctrl->maximum - qctrl->default_value - 1;
521 unsigned long gain = ((ctrl->value - qctrl->default_value - 1) *
522 111 + range / 2) / range + 9;
523
524 if (gain <= 32)
525 data = gain;
526 else if (gain <= 64)
527 data = ((gain - 32) * 16 + 16) / 32 + 80;
528 else
529 data = ((gain - 64) * 7 + 28) / 56 + 96;
530
531 dev_dbg(&icd->dev, "Setting gain from %d to %d\n",
532 reg_read(icd, MT9M001_GLOBAL_GAIN), data);
533 data = reg_write(icd, MT9M001_GLOBAL_GAIN, data);
534 if (data < 0)
535 return -EIO;
536 }
537
538 /* Success */
539 icd->gain = ctrl->value;
540 break;
541 case V4L2_CID_EXPOSURE:
542 /* mt9m001 has maximum == default */
543 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
544 return -EINVAL;
545 else {
546 unsigned long range = qctrl->maximum - qctrl->minimum;
547 unsigned long shutter = ((ctrl->value - qctrl->minimum) * 1048 +
548 range / 2) / range + 1;
549
550 dev_dbg(&icd->dev, "Setting shutter width from %d to %lu\n",
551 reg_read(icd, MT9M001_SHUTTER_WIDTH), shutter);
552 if (reg_write(icd, MT9M001_SHUTTER_WIDTH, shutter) < 0)
553 return -EIO;
554 icd->exposure = ctrl->value;
555 mt9m001->autoexposure = 0;
556 }
557 break;
558 case V4L2_CID_EXPOSURE_AUTO:
559 if (ctrl->value) {
560 const u16 vblank = 25;
561 if (reg_write(icd, MT9M001_SHUTTER_WIDTH, icd->height +
562 icd->y_skip_top + vblank) < 0)
563 return -EIO;
564 qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE);
565 icd->exposure = (524 + (icd->height + icd->y_skip_top + vblank - 1) *
566 (qctrl->maximum - qctrl->minimum)) /
567 1048 + qctrl->minimum;
568 mt9m001->autoexposure = 1;
569 } else
570 mt9m001->autoexposure = 0;
571 break;
572 }
573 return 0;
574}
575
576/* Interface active, can use i2c. If it fails, it can indeed mean, that
577 * this wasn't our capture interface, so, we wait for the right one */
578static int mt9m001_video_probe(struct soc_camera_device *icd)
579{
580 struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
581 s32 data;
582 int ret;
583
584 /* We must have a parent by now. And it cannot be a wrong one.
585 * So this entire test is completely redundant. */
586 if (!icd->dev.parent ||
587 to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
588 return -ENODEV;
589
590 /* Enable the chip */
591 data = reg_write(&mt9m001->icd, MT9M001_CHIP_ENABLE, 1);
592 dev_dbg(&icd->dev, "write: %d\n", data);
593
594 /* Read out the chip version register */
595 data = reg_read(icd, MT9M001_CHIP_VERSION);
596
597 /* must be 0x8411 or 0x8421 for colour sensor and 8431 for bw */
598 switch (data) {
599 case 0x8411:
600 case 0x8421:
601 mt9m001->model = V4L2_IDENT_MT9M001C12ST;
26f1b942 602 icd->formats = mt9m001_colour_formats;
bb55de3b 603 if (mt9m001->client->dev.platform_data)
26f1b942 604 icd->num_formats = ARRAY_SIZE(mt9m001_colour_formats);
bb55de3b 605 else
26f1b942 606 icd->num_formats = 1;
f523dd0d
GL		 607 break;
608 case 0x8431:
609 mt9m001->model = V4L2_IDENT_MT9M001C12STM;
26f1b942 610 icd->formats = mt9m001_monochrome_formats;
f523dd0d 611 if (mt9m001->client->dev.platform_data)
26f1b942 612 icd->num_formats = ARRAY_SIZE(mt9m001_monochrome_formats);
f523dd0d 613 else
26f1b942 614 icd->num_formats = 1;
f523dd0d
GL		 615 break;
616 default:
617 ret = -ENODEV;
618 dev_err(&icd->dev,
619 "No MT9M001 chip detected, register read %x\n", data);
620 goto ei2c;
621 }
622
623 dev_info(&icd->dev, "Detected a MT9M001 chip ID %x (%s)\n", data,
624 data == 0x8431 ? "C12STM" : "C12ST");
625
626 /* Now that we know the model, we can start video */
627 ret = soc_camera_video_start(icd);
628 if (ret)
629 goto eisis;
630
631 return 0;
632
633eisis:
634ei2c:
635 return ret;
636}
637
638static void mt9m001_video_remove(struct soc_camera_device *icd)
639{
640 struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
641
642 dev_dbg(&icd->dev, "Video %x removed: %p, %p\n", mt9m001->client->addr,
643 mt9m001->icd.dev.parent, mt9m001->icd.vdev);
644 soc_camera_video_stop(&mt9m001->icd);
645}
646
d2653e92
JD		 647static int mt9m001_probe(struct i2c_client *client,
648 const struct i2c_device_id *did)
f523dd0d
GL		 649{
650 struct mt9m001 *mt9m001;
651 struct soc_camera_device *icd;
652 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
653 struct soc_camera_link *icl = client->dev.platform_data;
654 int ret;
655
656 if (!icl) {
657 dev_err(&client->dev, "MT9M001 driver needs platform data\n");
658 return -EINVAL;
659 }
660
661 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
662 dev_warn(&adapter->dev,
663 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
664 return -EIO;
665 }
666
667 mt9m001 = kzalloc(sizeof(struct mt9m001), GFP_KERNEL);
668 if (!mt9m001)
669 return -ENOMEM;
670
671 mt9m001->client = client;
672 i2c_set_clientdata(client, mt9m001);
673
674 /* Second stage probe - when a capture adapter is there */
675 icd = &mt9m001->icd;
f523dd0d
GL		 676 icd->ops = &mt9m001_ops;
677 icd->control = &client->dev;
678 icd->x_min = 20;
679 icd->y_min = 12;
680 icd->x_current = 20;
681 icd->y_current = 12;
682 icd->width_min = 48;
683 icd->width_max = 1280;
684 icd->height_min = 32;
685 icd->height_max = 1024;
686 icd->y_skip_top = 1;
687 icd->iface = icl->bus_id;
688 /* Default datawidth - this is the only width this camera (normally)
689 * supports. It is only with extra logic that it can support
690 * other widths. Therefore it seems to be a sensible default. */
691 mt9m001->datawidth = 10;
692 /* Simulated autoexposure. If enabled, we calculate shutter width
693 * ourselves in the driver based on vertical blanking and frame width */
694 mt9m001->autoexposure = 1;
695
696 ret = bus_switch_request(mt9m001, icl);
697 if (ret)
698 goto eswinit;
699
700 ret = soc_camera_device_register(icd);
701 if (ret)
702 goto eisdr;
703
704 return 0;
705
706eisdr:
707 bus_switch_release(mt9m001);
708eswinit:
709 kfree(mt9m001);
710 return ret;
711}
712
713static int mt9m001_remove(struct i2c_client *client)
714{
715 struct mt9m001 *mt9m001 = i2c_get_clientdata(client);
716
717 soc_camera_device_unregister(&mt9m001->icd);
718 bus_switch_release(mt9m001);
719 kfree(mt9m001);
720
721 return 0;
722}
723
3760f736
JD		 724static const struct i2c_device_id mt9m001_id[] = {
725 { "mt9m001", 0 },
726 { }
727};
728MODULE_DEVICE_TABLE(i2c, mt9m001_id);
729
f523dd0d
GL		 730static struct i2c_driver mt9m001_i2c_driver = {
731 .driver = {
732 .name = "mt9m001",
733 },
734 .probe = mt9m001_probe,
735 .remove = mt9m001_remove,
3760f736 736 .id_table = mt9m001_id,
f523dd0d
GL		 737};
738
739static int __init mt9m001_mod_init(void)
740{
741 return i2c_add_driver(&mt9m001_i2c_driver);
742}
743
744static void __exit mt9m001_mod_exit(void)
745{
746 i2c_del_driver(&mt9m001_i2c_driver);
747}
748
749module_init(mt9m001_mod_init);
750module_exit(mt9m001_mod_exit);
751
752MODULE_DESCRIPTION("Micron MT9M001 Camera driver");
753MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
754MODULE_LICENSE("GPL");
Linux kernel - Deliverables
This page took 0.144042 seconds and 5 git commands to generate.