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,
59 struct v4l2_subdev sd;
60 unsigned width, height;
63 u16 global_gain, red_bal, blue_bal;
66 static inline struct mt9v011 *to_mt9v011(struct v4l2_subdev *sd)
68 return container_of(sd, struct mt9v011, sd);
71 static int mt9v011_read(struct v4l2_subdev *sd, unsigned char addr)
73 struct i2c_client *c = v4l2_get_subdevdata(sd);
77 rc = i2c_master_send(c, &addr, 1);
79 v4l2_dbg(0, debug, sd,
80 "i2c i/o error: rc == %d (should be 1)\n", rc);
84 rc = i2c_master_recv(c, (char *)&buffer, 2);
86 v4l2_dbg(0, debug, sd,
87 "i2c i/o error: rc == %d (should be 2)\n", rc);
89 val = be16_to_cpu(buffer);
91 v4l2_dbg(2, debug, sd, "mt9v011: read 0x%02x = 0x%04x\n", addr, val);
96 static void mt9v011_write(struct v4l2_subdev *sd, unsigned char addr,
99 struct i2c_client *c = v4l2_get_subdevdata(sd);
100 unsigned char buffer[3];
104 buffer[1] = value >> 8;
105 buffer[2] = value & 0xff;
107 v4l2_dbg(2, debug, sd,
108 "mt9v011: writing 0x%02x 0x%04x\n", buffer[0], value);
109 rc = i2c_master_send(c, buffer, 3);
111 v4l2_dbg(0, debug, sd,
112 "i2c i/o error: rc == %d (should be 3)\n", rc);
116 struct i2c_reg_value {
122 * Values used at the original driver
123 * Some values are marked as Reserved at the datasheet
125 static const struct i2c_reg_value mt9v011_init_default[] = {
126 { R0D_MT9V011_RESET, 0x0001 },
127 { R0D_MT9V011_RESET, 0x0000 },
129 { R0C_MT9V011_SHUTTER_DELAY, 0x0000 },
130 { R09_MT9V011_SHUTTER_WIDTH, 0x1fc },
132 { R0A_MT9V011_CLK_SPEED, 0x0000 },
133 { R1E_MT9V011_DIGITAL_ZOOM, 0x0000 },
134 { R20_MT9V011_READ_MODE, 0x1000 },
136 { R07_MT9V011_OUT_CTRL, 0x0002 }, /* chip enable */
139 static void set_balance(struct v4l2_subdev *sd)
141 struct mt9v011 *core = to_mt9v011(sd);
142 u16 green1_gain, green2_gain, blue_gain, red_gain;
144 green1_gain = core->global_gain;
145 green2_gain = core->global_gain;
147 blue_gain = core->global_gain +
148 core->global_gain * core->blue_bal / (1 << 9);
150 red_gain = core->global_gain +
151 core->global_gain * core->blue_bal / (1 << 9);
153 mt9v011_write(sd, R2B_MT9V011_GREEN_1_GAIN, green1_gain);
154 mt9v011_write(sd, R2E_MT9V011_GREEN_2_GAIN, green1_gain);
155 mt9v011_write(sd, R2C_MT9V011_BLUE_GAIN, blue_gain);
156 mt9v011_write(sd, R2D_MT9V011_RED_GAIN, red_gain);
159 static void calc_fps(struct v4l2_subdev *sd)
161 struct mt9v011 *core = to_mt9v011(sd);
162 unsigned height, width, hblank, vblank, speed;
163 unsigned row_time, t_time;
167 height = mt9v011_read(sd, R03_MT9V011_HEIGHT);
168 width = mt9v011_read(sd, R04_MT9V011_WIDTH);
169 hblank = mt9v011_read(sd, R05_MT9V011_HBLANK);
170 vblank = mt9v011_read(sd, R06_MT9V011_VBLANK);
171 speed = mt9v011_read(sd, R0A_MT9V011_CLK_SPEED);
173 row_time = (width + 113 + hblank) * (speed + 2);
174 t_time = row_time * (height + vblank + 1);
176 frames_per_ms = core->xtal * 1000l;
177 do_div(frames_per_ms, t_time);
180 v4l2_dbg(1, debug, sd, "Programmed to %u.%03u fps (%d pixel clcks)\n",
181 tmp / 1000, tmp % 1000, t_time);
184 static void set_res(struct v4l2_subdev *sd)
186 struct mt9v011 *core = to_mt9v011(sd);
187 unsigned vstart, hstart;
190 * The mt9v011 doesn't have scaling. So, in order to select the desired
191 * resolution, we're cropping at the middle of the sensor.
192 * hblank and vblank should be adjusted, in order to warrant that
193 * we'll preserve the line timings for 30 fps, no matter what resolution
195 * NOTE: datasheet says that width (and height) should be filled with
196 * width-1. However, this doesn't work, since one pixel per line will
200 hstart = 14 + (640 - core->width) / 2;
201 mt9v011_write(sd, R02_MT9V011_COLSTART, hstart);
202 mt9v011_write(sd, R04_MT9V011_WIDTH, core->width);
203 mt9v011_write(sd, R05_MT9V011_HBLANK, 771 - core->width);
205 vstart = 8 + (480 - core->height) / 2;
206 mt9v011_write(sd, R01_MT9V011_ROWSTART, vstart);
207 mt9v011_write(sd, R03_MT9V011_HEIGHT, core->height);
208 mt9v011_write(sd, R06_MT9V011_VBLANK, 508 - core->height);
213 static int mt9v011_reset(struct v4l2_subdev *sd, u32 val)
217 for (i = 0; i < ARRAY_SIZE(mt9v011_init_default); i++)
218 mt9v011_write(sd, mt9v011_init_default[i].reg,
219 mt9v011_init_default[i].value);
227 static int mt9v011_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
229 struct mt9v011 *core = to_mt9v011(sd);
231 v4l2_dbg(1, debug, sd, "g_ctrl called\n");
235 ctrl->value = core->global_gain;
237 case V4L2_CID_RED_BALANCE:
238 ctrl->value = core->red_bal;
240 case V4L2_CID_BLUE_BALANCE:
241 ctrl->value = core->blue_bal;
247 static int mt9v011_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
251 v4l2_dbg(1, debug, sd, "queryctrl called\n");
253 for (i = 0; i < ARRAY_SIZE(mt9v011_qctrl); i++)
254 if (qc->id && qc->id == mt9v011_qctrl[i].id) {
255 memcpy(qc, &(mt9v011_qctrl[i]),
264 static int mt9v011_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
266 struct mt9v011 *core = to_mt9v011(sd);
268 n = ARRAY_SIZE(mt9v011_qctrl);
270 for (i = 0; i < n; i++) {
271 if (ctrl->id != mt9v011_qctrl[i].id)
273 if (ctrl->value < mt9v011_qctrl[i].minimum ||
274 ctrl->value > mt9v011_qctrl[i].maximum)
276 v4l2_dbg(1, debug, sd, "s_ctrl: id=%d, value=%d\n",
277 ctrl->id, ctrl->value);
283 core->global_gain = ctrl->value;
285 case V4L2_CID_RED_BALANCE:
286 core->red_bal = ctrl->value;
288 case V4L2_CID_BLUE_BALANCE:
289 core->blue_bal = ctrl->value;
300 static int mt9v011_enum_fmt(struct v4l2_subdev *sd, struct v4l2_fmtdesc *fmt)
306 strcpy(fmt->description, "8 bpp Bayer GRGR..BGBG");
307 fmt->pixelformat = V4L2_PIX_FMT_SGRBG8;
312 static int mt9v011_try_fmt(struct v4l2_subdev *sd, struct v4l2_format *fmt)
314 struct v4l2_pix_format *pix = &fmt->fmt.pix;
316 if (pix->pixelformat != V4L2_PIX_FMT_SGRBG8)
319 v4l_bound_align_image(&pix->width, 48, 639, 1,
320 &pix->height, 32, 480, 1, 0);
325 static int mt9v011_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *fmt)
327 struct v4l2_pix_format *pix = &fmt->fmt.pix;
328 struct mt9v011 *core = to_mt9v011(sd);
331 rc = mt9v011_try_fmt(sd, fmt);
335 core->width = pix->width;
336 core->height = pix->height;
343 static int mt9v011_s_config(struct v4l2_subdev *sd, int dumb, void *data)
345 struct mt9v011 *core = to_mt9v011(sd);
346 unsigned *xtal = data;
348 v4l2_dbg(1, debug, sd, "s_config called\n");
352 v4l2_dbg(1, debug, sd, "xtal set to %d.%03d MHz\n",
353 *xtal / 1000000, (*xtal / 1000) % 1000);
360 #ifdef CONFIG_VIDEO_ADV_DEBUG
361 static int mt9v011_g_register(struct v4l2_subdev *sd,
362 struct v4l2_dbg_register *reg)
364 struct i2c_client *client = v4l2_get_subdevdata(sd);
366 if (!v4l2_chip_match_i2c_client(client, ®->match))
368 if (!capable(CAP_SYS_ADMIN))
371 reg->val = mt9v011_read(sd, reg->reg & 0xff);
377 static int mt9v011_s_register(struct v4l2_subdev *sd,
378 struct v4l2_dbg_register *reg)
380 struct i2c_client *client = v4l2_get_subdevdata(sd);
382 if (!v4l2_chip_match_i2c_client(client, ®->match))
384 if (!capable(CAP_SYS_ADMIN))
387 mt9v011_write(sd, reg->reg & 0xff, reg->val & 0xffff);
393 static int mt9v011_g_chip_ident(struct v4l2_subdev *sd,
394 struct v4l2_dbg_chip_ident *chip)
397 struct i2c_client *client = v4l2_get_subdevdata(sd);
399 version = mt9v011_read(sd, R00_MT9V011_CHIP_VERSION);
401 return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_MT9V011,
405 static const struct v4l2_subdev_core_ops mt9v011_core_ops = {
406 .queryctrl = mt9v011_queryctrl,
407 .g_ctrl = mt9v011_g_ctrl,
408 .s_ctrl = mt9v011_s_ctrl,
409 .reset = mt9v011_reset,
410 .s_config = mt9v011_s_config,
411 .g_chip_ident = mt9v011_g_chip_ident,
412 #ifdef CONFIG_VIDEO_ADV_DEBUG
413 .g_register = mt9v011_g_register,
414 .s_register = mt9v011_s_register,
418 static const struct v4l2_subdev_video_ops mt9v011_video_ops = {
419 .enum_fmt = mt9v011_enum_fmt,
420 .try_fmt = mt9v011_try_fmt,
421 .s_fmt = mt9v011_s_fmt,
424 static const struct v4l2_subdev_ops mt9v011_ops = {
425 .core = &mt9v011_core_ops,
426 .video = &mt9v011_video_ops,
430 /****************************************************************************
432 ****************************************************************************/
434 static int mt9v011_probe(struct i2c_client *c,
435 const struct i2c_device_id *id)
438 struct mt9v011 *core;
439 struct v4l2_subdev *sd;
441 /* Check if the adapter supports the needed features */
442 if (!i2c_check_functionality(c->adapter,
443 I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
446 core = kzalloc(sizeof(struct mt9v011), GFP_KERNEL);
451 v4l2_i2c_subdev_init(sd, c, &mt9v011_ops);
453 /* Check if the sensor is really a MT9V011 */
454 version = mt9v011_read(sd, R00_MT9V011_CHIP_VERSION);
455 if ((version != MT9V011_VERSION) &&
456 (version != MT9V011_REV_B_VERSION)) {
457 v4l2_info(sd, "*** unknown micron chip detected (0x%04x).\n",
463 core->global_gain = 0x0024;
466 core->xtal = 27000000; /* Hz */
468 v4l_info(c, "chip found @ 0x%02x (%s - chip version 0x%04x)\n",
469 c->addr << 1, c->adapter->name, version);
474 static int mt9v011_remove(struct i2c_client *c)
476 struct v4l2_subdev *sd = i2c_get_clientdata(c);
478 v4l2_dbg(1, debug, sd,
479 "mt9v011.c: removing mt9v011 adapter on address 0x%x\n",
482 v4l2_device_unregister_subdev(sd);
483 kfree(to_mt9v011(sd));
487 /* ----------------------------------------------------------------------- */
489 static const struct i2c_device_id mt9v011_id[] = {
493 MODULE_DEVICE_TABLE(i2c, mt9v011_id);
495 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
497 .probe = mt9v011_probe,
498 .remove = mt9v011_remove,
499 .id_table = mt9v011_id,