2 * mt9v011 -Micron 1/4-Inch VGA Digital Image Sensor
4 * Copyright (c) 2009 Mauro Carvalho Chehab (mchehab@redhat.com)
5 * This code is placed under the terms of the GNU General Public License v2
9 #include <linux/videodev2.h>
10 #include <linux/delay.h>
11 #include <asm/div64.h>
12 #include <media/v4l2-device.h>
14 #include <media/v4l2-i2c-drv.h>
15 #include <media/v4l2-chip-ident.h>
17 MODULE_DESCRIPTION("Micron mt9v011 sensor driver");
18 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
19 MODULE_LICENSE("GPL");
23 module_param(debug, int, 0);
24 MODULE_PARM_DESC(debug, "Debug level (0-2)");
26 /* supported controls */
27 static struct v4l2_queryctrl mt9v011_qctrl[] = {
30 .type = V4L2_CTRL_TYPE_INTEGER,
33 .maximum = (1 << 10) - 1,
35 .default_value = 0x0020,
38 .id = V4L2_CID_RED_BALANCE,
39 .type = V4L2_CTRL_TYPE_INTEGER,
40 .name = "Red Balance",
42 .maximum = (1 << 9) - 1,
47 .id = V4L2_CID_BLUE_BALANCE,
48 .type = V4L2_CTRL_TYPE_INTEGER,
49 .name = "Blue Balance",
51 .maximum = (1 << 9) - 1,
57 .type = V4L2_CTRL_TYPE_BOOLEAN,
66 .type = V4L2_CTRL_TYPE_BOOLEAN,
78 struct v4l2_subdev sd;
79 unsigned width, height;
84 u16 global_gain, red_bal, blue_bal;
87 static inline struct mt9v011 *to_mt9v011(struct v4l2_subdev *sd)
89 return container_of(sd, struct mt9v011, sd);
92 static int mt9v011_read(struct v4l2_subdev *sd, unsigned char addr)
94 struct i2c_client *c = v4l2_get_subdevdata(sd);
98 rc = i2c_master_send(c, &addr, 1);
100 v4l2_dbg(0, debug, sd,
101 "i2c i/o error: rc == %d (should be 1)\n", rc);
105 rc = i2c_master_recv(c, (char *)&buffer, 2);
107 v4l2_dbg(0, debug, sd,
108 "i2c i/o error: rc == %d (should be 2)\n", rc);
110 val = be16_to_cpu(buffer);
112 v4l2_dbg(2, debug, sd, "mt9v011: read 0x%02x = 0x%04x\n", addr, val);
117 static void mt9v011_write(struct v4l2_subdev *sd, unsigned char addr,
120 struct i2c_client *c = v4l2_get_subdevdata(sd);
121 unsigned char buffer[3];
125 buffer[1] = value >> 8;
126 buffer[2] = value & 0xff;
128 v4l2_dbg(2, debug, sd,
129 "mt9v011: writing 0x%02x 0x%04x\n", buffer[0], value);
130 rc = i2c_master_send(c, buffer, 3);
132 v4l2_dbg(0, debug, sd,
133 "i2c i/o error: rc == %d (should be 3)\n", rc);
137 struct i2c_reg_value {
143 * Values used at the original driver
144 * Some values are marked as Reserved at the datasheet
146 static const struct i2c_reg_value mt9v011_init_default[] = {
147 { R0D_MT9V011_RESET, 0x0001 },
148 { R0D_MT9V011_RESET, 0x0000 },
150 { R0C_MT9V011_SHUTTER_DELAY, 0x0000 },
151 { R09_MT9V011_SHUTTER_WIDTH, 0x1fc },
153 { R0A_MT9V011_CLK_SPEED, 0x0000 },
154 { R1E_MT9V011_DIGITAL_ZOOM, 0x0000 },
156 { R07_MT9V011_OUT_CTRL, 0x0002 }, /* chip enable */
159 static void set_balance(struct v4l2_subdev *sd)
161 struct mt9v011 *core = to_mt9v011(sd);
162 u16 green1_gain, green2_gain, blue_gain, red_gain;
164 green1_gain = core->global_gain;
165 green2_gain = core->global_gain;
167 blue_gain = core->global_gain +
168 core->global_gain * core->blue_bal / (1 << 9);
170 red_gain = core->global_gain +
171 core->global_gain * core->blue_bal / (1 << 9);
173 mt9v011_write(sd, R2B_MT9V011_GREEN_1_GAIN, green1_gain);
174 mt9v011_write(sd, R2E_MT9V011_GREEN_2_GAIN, green1_gain);
175 mt9v011_write(sd, R2C_MT9V011_BLUE_GAIN, blue_gain);
176 mt9v011_write(sd, R2D_MT9V011_RED_GAIN, red_gain);
179 static void calc_fps(struct v4l2_subdev *sd, u32 *numerator, u32 *denominator)
181 struct mt9v011 *core = to_mt9v011(sd);
182 unsigned height, width, hblank, vblank, speed;
183 unsigned row_time, t_time;
187 height = mt9v011_read(sd, R03_MT9V011_HEIGHT);
188 width = mt9v011_read(sd, R04_MT9V011_WIDTH);
189 hblank = mt9v011_read(sd, R05_MT9V011_HBLANK);
190 vblank = mt9v011_read(sd, R06_MT9V011_VBLANK);
191 speed = mt9v011_read(sd, R0A_MT9V011_CLK_SPEED);
193 row_time = (width + 113 + hblank) * (speed + 2);
194 t_time = row_time * (height + vblank + 1);
196 frames_per_ms = core->xtal * 1000l;
197 do_div(frames_per_ms, t_time);
200 v4l2_dbg(1, debug, sd, "Programmed to %u.%03u fps (%d pixel clcks)\n",
201 tmp / 1000, tmp % 1000, t_time);
203 if (numerator && denominator) {
205 *denominator = (u32)frames_per_ms;
209 static u16 calc_speed(struct v4l2_subdev *sd, u32 numerator, u32 denominator)
211 struct mt9v011 *core = to_mt9v011(sd);
212 unsigned height, width, hblank, vblank;
213 unsigned row_time, line_time;
216 /* Avoid bogus calculus */
217 if (!numerator || !denominator)
220 height = mt9v011_read(sd, R03_MT9V011_HEIGHT);
221 width = mt9v011_read(sd, R04_MT9V011_WIDTH);
222 hblank = mt9v011_read(sd, R05_MT9V011_HBLANK);
223 vblank = mt9v011_read(sd, R06_MT9V011_VBLANK);
225 row_time = width + 113 + hblank;
226 line_time = height + vblank + 1;
228 t_time = core->xtal * ((u64)numerator);
229 /* round to the closest value */
230 t_time += denominator / 2;
231 do_div(t_time, denominator);
234 do_div(speed, row_time * line_time);
236 /* Avoid having a negative value for speed */
242 /* Avoid speed overflow */
249 static void set_res(struct v4l2_subdev *sd)
251 struct mt9v011 *core = to_mt9v011(sd);
252 unsigned vstart, hstart;
255 * The mt9v011 doesn't have scaling. So, in order to select the desired
256 * resolution, we're cropping at the middle of the sensor.
257 * hblank and vblank should be adjusted, in order to warrant that
258 * we'll preserve the line timings for 30 fps, no matter what resolution
260 * NOTE: datasheet says that width (and height) should be filled with
261 * width-1. However, this doesn't work, since one pixel per line will
265 hstart = 14 + (640 - core->width) / 2;
266 mt9v011_write(sd, R02_MT9V011_COLSTART, hstart);
267 mt9v011_write(sd, R04_MT9V011_WIDTH, core->width);
268 mt9v011_write(sd, R05_MT9V011_HBLANK, 771 - core->width);
270 vstart = 8 + (480 - core->height) / 2;
271 mt9v011_write(sd, R01_MT9V011_ROWSTART, vstart);
272 mt9v011_write(sd, R03_MT9V011_HEIGHT, core->height);
273 mt9v011_write(sd, R06_MT9V011_VBLANK, 508 - core->height);
275 calc_fps(sd, NULL, NULL);
278 static void set_read_mode(struct v4l2_subdev *sd)
280 struct mt9v011 *core = to_mt9v011(sd);
281 unsigned mode = 0x1000;
289 mt9v011_write(sd, R20_MT9V011_READ_MODE, mode);
292 static int mt9v011_reset(struct v4l2_subdev *sd, u32 val)
296 for (i = 0; i < ARRAY_SIZE(mt9v011_init_default); i++)
297 mt9v011_write(sd, mt9v011_init_default[i].reg,
298 mt9v011_init_default[i].value);
307 static int mt9v011_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
309 struct mt9v011 *core = to_mt9v011(sd);
311 v4l2_dbg(1, debug, sd, "g_ctrl called\n");
315 ctrl->value = core->global_gain;
317 case V4L2_CID_RED_BALANCE:
318 ctrl->value = core->red_bal;
320 case V4L2_CID_BLUE_BALANCE:
321 ctrl->value = core->blue_bal;
324 ctrl->value = core->hflip ? 1 : 0;
327 ctrl->value = core->vflip ? 1 : 0;
333 static int mt9v011_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
337 v4l2_dbg(1, debug, sd, "queryctrl called\n");
339 for (i = 0; i < ARRAY_SIZE(mt9v011_qctrl); i++)
340 if (qc->id && qc->id == mt9v011_qctrl[i].id) {
341 memcpy(qc, &(mt9v011_qctrl[i]),
350 static int mt9v011_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
352 struct mt9v011 *core = to_mt9v011(sd);
354 n = ARRAY_SIZE(mt9v011_qctrl);
356 for (i = 0; i < n; i++) {
357 if (ctrl->id != mt9v011_qctrl[i].id)
359 if (ctrl->value < mt9v011_qctrl[i].minimum ||
360 ctrl->value > mt9v011_qctrl[i].maximum)
362 v4l2_dbg(1, debug, sd, "s_ctrl: id=%d, value=%d\n",
363 ctrl->id, ctrl->value);
369 core->global_gain = ctrl->value;
371 case V4L2_CID_RED_BALANCE:
372 core->red_bal = ctrl->value;
374 case V4L2_CID_BLUE_BALANCE:
375 core->blue_bal = ctrl->value;
378 core->hflip = ctrl->value;
382 core->vflip = ctrl->value;
394 static int mt9v011_enum_fmt(struct v4l2_subdev *sd, struct v4l2_fmtdesc *fmt)
400 strcpy(fmt->description, "8 bpp Bayer GRGR..BGBG");
401 fmt->pixelformat = V4L2_PIX_FMT_SGRBG8;
406 static int mt9v011_try_fmt(struct v4l2_subdev *sd, struct v4l2_format *fmt)
408 struct v4l2_pix_format *pix = &fmt->fmt.pix;
410 if (pix->pixelformat != V4L2_PIX_FMT_SGRBG8)
413 v4l_bound_align_image(&pix->width, 48, 639, 1,
414 &pix->height, 32, 480, 1, 0);
419 static int mt9v011_g_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms)
421 struct v4l2_captureparm *cp = &parms->parm.capture;
423 if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
426 memset(cp, 0, sizeof(struct v4l2_captureparm));
427 cp->capability = V4L2_CAP_TIMEPERFRAME;
429 &cp->timeperframe.numerator,
430 &cp->timeperframe.denominator);
435 static int mt9v011_s_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms)
437 struct v4l2_captureparm *cp = &parms->parm.capture;
438 struct v4l2_fract *tpf = &cp->timeperframe;
441 if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
443 if (cp->extendedmode != 0)
446 speed = calc_speed(sd, tpf->numerator, tpf->denominator);
448 mt9v011_write(sd, R0A_MT9V011_CLK_SPEED, speed);
449 v4l2_dbg(1, debug, sd, "Setting speed to %d\n", speed);
451 /* Recalculate and update fps info */
452 calc_fps(sd, &tpf->numerator, &tpf->denominator);
457 static int mt9v011_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *fmt)
459 struct v4l2_pix_format *pix = &fmt->fmt.pix;
460 struct mt9v011 *core = to_mt9v011(sd);
463 rc = mt9v011_try_fmt(sd, fmt);
467 core->width = pix->width;
468 core->height = pix->height;
475 static int mt9v011_s_config(struct v4l2_subdev *sd, int dumb, void *data)
477 struct mt9v011 *core = to_mt9v011(sd);
478 unsigned *xtal = data;
480 v4l2_dbg(1, debug, sd, "s_config called\n");
484 v4l2_dbg(1, debug, sd, "xtal set to %d.%03d MHz\n",
485 *xtal / 1000000, (*xtal / 1000) % 1000);
492 #ifdef CONFIG_VIDEO_ADV_DEBUG
493 static int mt9v011_g_register(struct v4l2_subdev *sd,
494 struct v4l2_dbg_register *reg)
496 struct i2c_client *client = v4l2_get_subdevdata(sd);
498 if (!v4l2_chip_match_i2c_client(client, ®->match))
500 if (!capable(CAP_SYS_ADMIN))
503 reg->val = mt9v011_read(sd, reg->reg & 0xff);
509 static int mt9v011_s_register(struct v4l2_subdev *sd,
510 struct v4l2_dbg_register *reg)
512 struct i2c_client *client = v4l2_get_subdevdata(sd);
514 if (!v4l2_chip_match_i2c_client(client, ®->match))
516 if (!capable(CAP_SYS_ADMIN))
519 mt9v011_write(sd, reg->reg & 0xff, reg->val & 0xffff);
525 static int mt9v011_g_chip_ident(struct v4l2_subdev *sd,
526 struct v4l2_dbg_chip_ident *chip)
529 struct i2c_client *client = v4l2_get_subdevdata(sd);
531 version = mt9v011_read(sd, R00_MT9V011_CHIP_VERSION);
533 return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_MT9V011,
537 static const struct v4l2_subdev_core_ops mt9v011_core_ops = {
538 .queryctrl = mt9v011_queryctrl,
539 .g_ctrl = mt9v011_g_ctrl,
540 .s_ctrl = mt9v011_s_ctrl,
541 .reset = mt9v011_reset,
542 .s_config = mt9v011_s_config,
543 .g_chip_ident = mt9v011_g_chip_ident,
544 #ifdef CONFIG_VIDEO_ADV_DEBUG
545 .g_register = mt9v011_g_register,
546 .s_register = mt9v011_s_register,
550 static const struct v4l2_subdev_video_ops mt9v011_video_ops = {
551 .enum_fmt = mt9v011_enum_fmt,
552 .try_fmt = mt9v011_try_fmt,
553 .s_fmt = mt9v011_s_fmt,
554 .g_parm = mt9v011_g_parm,
555 .s_parm = mt9v011_s_parm,
558 static const struct v4l2_subdev_ops mt9v011_ops = {
559 .core = &mt9v011_core_ops,
560 .video = &mt9v011_video_ops,
564 /****************************************************************************
566 ****************************************************************************/
568 static int mt9v011_probe(struct i2c_client *c,
569 const struct i2c_device_id *id)
572 struct mt9v011 *core;
573 struct v4l2_subdev *sd;
575 /* Check if the adapter supports the needed features */
576 if (!i2c_check_functionality(c->adapter,
577 I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
580 core = kzalloc(sizeof(struct mt9v011), GFP_KERNEL);
585 v4l2_i2c_subdev_init(sd, c, &mt9v011_ops);
587 /* Check if the sensor is really a MT9V011 */
588 version = mt9v011_read(sd, R00_MT9V011_CHIP_VERSION);
589 if ((version != MT9V011_VERSION) &&
590 (version != MT9V011_REV_B_VERSION)) {
591 v4l2_info(sd, "*** unknown micron chip detected (0x%04x).\n",
597 core->global_gain = 0x0024;
600 core->xtal = 27000000; /* Hz */
602 v4l_info(c, "chip found @ 0x%02x (%s - chip version 0x%04x)\n",
603 c->addr << 1, c->adapter->name, version);
608 static int mt9v011_remove(struct i2c_client *c)
610 struct v4l2_subdev *sd = i2c_get_clientdata(c);
612 v4l2_dbg(1, debug, sd,
613 "mt9v011.c: removing mt9v011 adapter on address 0x%x\n",
616 v4l2_device_unregister_subdev(sd);
617 kfree(to_mt9v011(sd));
621 /* ----------------------------------------------------------------------- */
623 static const struct i2c_device_id mt9v011_id[] = {
627 MODULE_DEVICE_TABLE(i2c, mt9v011_id);
629 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
631 .probe = mt9v011_probe,
632 .remove = mt9v011_remove,
633 .id_table = mt9v011_id,