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 <media/v4l2-device.h>
13 #include <media/v4l2-i2c-drv.h>
14 #include <media/v4l2-chip-ident.h>
16 MODULE_DESCRIPTION("Micron mt9v011 sensor driver");
17 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
18 MODULE_LICENSE("GPL");
22 module_param(debug, int, 0);
23 MODULE_PARM_DESC(debug, "Debug level (0-2)");
25 /* supported controls */
26 static struct v4l2_queryctrl mt9v011_qctrl[] = {
29 .type = V4L2_CTRL_TYPE_INTEGER,
32 .maximum = (1 << 10) - 1,
34 .default_value = 0x0020,
37 .id = V4L2_CID_RED_BALANCE,
38 .type = V4L2_CTRL_TYPE_INTEGER,
39 .name = "Red Balance",
41 .maximum = (1 << 9) - 1,
46 .id = V4L2_CID_BLUE_BALANCE,
47 .type = V4L2_CTRL_TYPE_INTEGER,
48 .name = "Blue Balance",
50 .maximum = (1 << 9) - 1,
58 struct v4l2_subdev sd;
59 unsigned width, height;
61 u16 global_gain, red_bal, blue_bal;
64 static inline struct mt9v011 *to_mt9v011(struct v4l2_subdev *sd)
66 return container_of(sd, struct mt9v011, sd);
69 static int mt9v011_read(struct v4l2_subdev *sd, unsigned char addr)
71 struct i2c_client *c = v4l2_get_subdevdata(sd);
75 rc = i2c_master_send(c, &addr, 1);
77 v4l2_dbg(0, debug, sd,
78 "i2c i/o error: rc == %d (should be 1)\n", rc);
82 rc = i2c_master_recv(c, (char *)&buffer, 2);
84 v4l2_dbg(0, debug, sd,
85 "i2c i/o error: rc == %d (should be 2)\n", rc);
87 val = be16_to_cpu(buffer);
89 v4l2_dbg(2, debug, sd, "mt9v011: read 0x%02x = 0x%04x\n", addr, val);
94 static void mt9v011_write(struct v4l2_subdev *sd, unsigned char addr,
97 struct i2c_client *c = v4l2_get_subdevdata(sd);
98 unsigned char buffer[3];
102 buffer[1] = value >> 8;
103 buffer[2] = value & 0xff;
105 v4l2_dbg(2, debug, sd,
106 "mt9v011: writing 0x%02x 0x%04x\n", buffer[0], value);
107 rc = i2c_master_send(c, buffer, 3);
109 v4l2_dbg(0, debug, sd,
110 "i2c i/o error: rc == %d (should be 3)\n", rc);
114 struct i2c_reg_value {
120 * Values used at the original driver
121 * Some values are marked as Reserved at the datasheet
123 static const struct i2c_reg_value mt9v011_init_default[] = {
124 { R0D_MT9V011_RESET, 0x0001 },
125 { R0D_MT9V011_RESET, 0x0000 },
127 { R09_MT9V011_SHUTTER_WIDTH, 0x0418 },
128 { R0A_MT9V011_CLK_SPEED, 0x0000 },
129 { R0C_MT9V011_SHUTTER_DELAY, 0x0000 },
130 { R1E_MT9V011_DIGITAL_ZOOM, 0x0000 },
131 { R20_MT9V011_READ_MODE, 0x1100 },
134 * Those registers are not docummented at the datasheet.
135 * However, the original driver initializes them
142 { 0x58, 0x0038 }, /* Datasheet default 0x0078 */
143 { 0x59, 0x0723 }, /* Datasheet default 0x0703 */
144 { 0x62, 0x041a }, /* Datasheet default 0x0418 */
146 { R07_MT9V011_OUT_CTRL, 0x000a }, /* chip enable */
149 static void set_balance(struct v4l2_subdev *sd)
151 struct mt9v011 *core = to_mt9v011(sd);
152 u16 green1_gain, green2_gain, blue_gain, red_gain;
154 green1_gain = core->global_gain;
155 green2_gain = core->global_gain;
157 blue_gain = core->global_gain +
158 core->global_gain * core->blue_bal / (1 << 9);
160 red_gain = core->global_gain +
161 core->global_gain * core->blue_bal / (1 << 9);
163 mt9v011_write(sd, R2B_MT9V011_GREEN_1_GAIN, green1_gain);
164 mt9v011_write(sd, R2E_MT9V011_GREEN_2_GAIN, green1_gain);
165 mt9v011_write(sd, R2C_MT9V011_BLUE_GAIN, blue_gain);
166 mt9v011_write(sd, R2D_MT9V011_RED_GAIN, red_gain);
169 static void set_res(struct v4l2_subdev *sd)
171 struct mt9v011 *core = to_mt9v011(sd);
172 unsigned vstart, hstart;
175 * The mt9v011 doesn't have scaling. So, in order to select the desired
176 * resolution, we're cropping at the middle of the sensor.
177 * hblank and vblank should be adjusted, in order to warrant that
178 * we'll preserve the line timings for 30 fps, no matter what resolution
182 hstart = 14 + (640 - core->width) / 2;
183 mt9v011_write(sd, R02_MT9V011_COLSTART, hstart);
184 mt9v011_write(sd, R04_MT9V011_WIDTH, core->width);
185 mt9v011_write(sd, R05_MT9V011_HBLANK, 771 - core->width);
187 vstart = 8 + (640 - core->height) / 2;
188 mt9v011_write(sd, R01_MT9V011_ROWSTART, vstart);
189 mt9v011_write(sd, R03_MT9V011_HEIGHT, core->height);
190 mt9v011_write(sd, R06_MT9V011_VBLANK, 508 - core->height);
193 static int mt9v011_reset(struct v4l2_subdev *sd, u32 val)
197 for (i = 0; i < ARRAY_SIZE(mt9v011_init_default); i++)
198 mt9v011_write(sd, mt9v011_init_default[i].reg,
199 mt9v011_init_default[i].value);
207 static int mt9v011_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
209 struct mt9v011 *core = to_mt9v011(sd);
211 v4l2_dbg(1, debug, sd, "g_ctrl called\n");
215 ctrl->value = core->global_gain;
217 case V4L2_CID_RED_BALANCE:
218 ctrl->value = core->red_bal;
220 case V4L2_CID_BLUE_BALANCE:
221 ctrl->value = core->blue_bal;
227 static int mt9v011_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
229 struct mt9v011 *core = to_mt9v011(sd);
231 n = ARRAY_SIZE(mt9v011_qctrl);
233 for (i = 0; i < n; i++) {
234 if (ctrl->id != mt9v011_qctrl[i].id)
236 if (ctrl->value < mt9v011_qctrl[i].minimum ||
237 ctrl->value > mt9v011_qctrl[i].maximum)
239 v4l2_dbg(1, debug, sd, "s_ctrl: id=%d, value=%d\n",
240 ctrl->id, ctrl->value);
246 core->global_gain = ctrl->value;
248 case V4L2_CID_RED_BALANCE:
249 core->red_bal = ctrl->value;
251 case V4L2_CID_BLUE_BALANCE:
252 core->blue_bal = ctrl->value;
263 static int mt9v011_enum_fmt(struct v4l2_subdev *sd, struct v4l2_fmtdesc *fmt)
269 strcpy(fmt->description, "8 bpp Bayer GRGR..BGBG");
270 fmt->pixelformat = V4L2_PIX_FMT_SGRBG8;
275 static int mt9v011_try_fmt(struct v4l2_subdev *sd, struct v4l2_format *fmt)
277 struct v4l2_pix_format *pix = &fmt->fmt.pix;
279 if (pix->pixelformat != V4L2_PIX_FMT_SGRBG8)
282 v4l_bound_align_image(&pix->width, 48, 639, 1,
283 &pix->height, 32, 480, 1, 0);
288 static int mt9v011_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *fmt)
290 struct v4l2_pix_format *pix = &fmt->fmt.pix;
291 struct mt9v011 *core = to_mt9v011(sd);
294 rc = mt9v011_try_fmt(sd, fmt);
298 core->width = pix->width;
299 core->height = pix->height;
307 #ifdef CONFIG_VIDEO_ADV_DEBUG
308 static int mt9v011_g_register(struct v4l2_subdev *sd,
309 struct v4l2_dbg_register *reg)
311 struct i2c_client *client = v4l2_get_subdevdata(sd);
313 if (!v4l2_chip_match_i2c_client(client, ®->match))
315 if (!capable(CAP_SYS_ADMIN))
318 reg->val = mt9v011_read(sd, reg->reg & 0xff);
324 static int mt9v011_s_register(struct v4l2_subdev *sd,
325 struct v4l2_dbg_register *reg)
327 struct i2c_client *client = v4l2_get_subdevdata(sd);
329 if (!v4l2_chip_match_i2c_client(client, ®->match))
331 if (!capable(CAP_SYS_ADMIN))
334 mt9v011_write(sd, reg->reg & 0xff, reg->val & 0xffff);
340 static int mt9v011_g_chip_ident(struct v4l2_subdev *sd,
341 struct v4l2_dbg_chip_ident *chip)
343 struct i2c_client *client = v4l2_get_subdevdata(sd);
345 return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_MT9V011,
349 static const struct v4l2_subdev_core_ops mt9v011_core_ops = {
350 .g_ctrl = mt9v011_g_ctrl,
351 .s_ctrl = mt9v011_s_ctrl,
352 .reset = mt9v011_reset,
353 .g_chip_ident = mt9v011_g_chip_ident,
354 #ifdef CONFIG_VIDEO_ADV_DEBUG
355 .g_register = mt9v011_g_register,
356 .s_register = mt9v011_s_register,
360 static const struct v4l2_subdev_video_ops mt9v011_video_ops = {
361 .enum_fmt = mt9v011_enum_fmt,
362 .try_fmt = mt9v011_try_fmt,
363 .s_fmt = mt9v011_s_fmt,
366 static const struct v4l2_subdev_ops mt9v011_ops = {
367 .core = &mt9v011_core_ops,
368 .video = &mt9v011_video_ops,
372 /****************************************************************************
374 ****************************************************************************/
376 static int mt9v011_probe(struct i2c_client *c,
377 const struct i2c_device_id *id)
380 struct mt9v011 *core;
381 struct v4l2_subdev *sd;
383 /* Check if the adapter supports the needed features */
384 if (!i2c_check_functionality(c->adapter,
385 I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
388 core = kzalloc(sizeof(struct mt9v011), GFP_KERNEL);
393 v4l2_i2c_subdev_init(sd, c, &mt9v011_ops);
395 /* Check if the sensor is really a MT9V011 */
396 version = mt9v011_read(sd, R00_MT9V011_CHIP_VERSION);
397 if (version != MT9V011_VERSION) {
398 v4l2_info(sd, "*** unknown micron chip detected (0x%04x.\n",
404 core->global_gain = 0x0024;
408 v4l_info(c, "chip found @ 0x%02x (%s)\n",
409 c->addr << 1, c->adapter->name);
414 static int mt9v011_remove(struct i2c_client *c)
416 struct v4l2_subdev *sd = i2c_get_clientdata(c);
418 v4l2_dbg(1, debug, sd,
419 "mt9v011.c: removing mt9v011 adapter on address 0x%x\n",
422 v4l2_device_unregister_subdev(sd);
423 kfree(to_mt9v011(sd));
427 /* ----------------------------------------------------------------------- */
429 static const struct i2c_device_id mt9v011_id[] = {
433 MODULE_DEVICE_TABLE(i2c, mt9v011_id);
435 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
437 .probe = mt9v011_probe,
438 .remove = mt9v011_remove,
439 .id_table = mt9v011_id,