V4L/DVB (12135): Add a driver for mt9v011 sensor
Mauro Carvalho Chehab [Mon, 29 Jun 2009 08:41:26 +0000 (05:41 -0300)]
Adds driver for mt9v011 based on its datasheet, available at:
http://download.micron.com/pdf/datasheets/imaging/MT9V011.pdf

The driver was tested with a webcam that will be added on a next patch.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/Kconfig
drivers/media/video/Makefile
drivers/media/video/mt9v011.c [new file with mode: 0644]
drivers/media/video/mt9v011.h [new file with mode: 0644]
include/media/v4l2-chip-ident.h

index 061e147..84b6fc1 100644 (file)
@@ -312,6 +312,14 @@ config VIDEO_OV7670
          OV7670 VGA camera.  It currently only works with the M88ALP01
          controller.
 
+config VIDEO_MT9V011
+       tristate "Micron mt9v011 sensor support"
+       depends on I2C && VIDEO_V4L2
+       ---help---
+         This is a Video4Linux2 sensor-level driver for the Micron
+         mt0v011 1.3 Mpixel camera.  It currently only works with the
+         em28xx driver.
+
 config VIDEO_TCM825X
        tristate "TCM825x camera sensor support"
        depends on I2C && VIDEO_V4L2
index 7fb3add..9f2e321 100644 (file)
@@ -69,6 +69,7 @@ obj-$(CONFIG_VIDEO_UPD64083) += upd64083.o
 obj-$(CONFIG_VIDEO_OV7670)     += ov7670.o
 obj-$(CONFIG_VIDEO_TCM825X) += tcm825x.o
 obj-$(CONFIG_VIDEO_TVEEPROM) += tveeprom.o
+obj-$(CONFIG_VIDEO_MT9V011) += mt9v011.o
 
 obj-$(CONFIG_SOC_CAMERA_MT9M001)       += mt9m001.o
 obj-$(CONFIG_SOC_CAMERA_MT9M111)       += mt9m111.o
diff --git a/drivers/media/video/mt9v011.c b/drivers/media/video/mt9v011.c
new file mode 100644 (file)
index 0000000..4389197
--- /dev/null
@@ -0,0 +1,355 @@
+/*
+ * mt9v011 -Micron 1/4-Inch VGA Digital Image Sensor
+ *
+ * Copyright (c) 2009 Mauro Carvalho Chehab (mchehab@redhat.com)
+ * This code is placed under the terms of the GNU General Public License v2
+ */
+
+#include <linux/i2c.h>
+#include <linux/videodev2.h>
+#include <linux/delay.h>
+#include <media/v4l2-device.h>
+#include "mt9v011.h"
+#include <media/v4l2-i2c-drv.h>
+#include <media/v4l2-chip-ident.h>
+
+MODULE_DESCRIPTION("Micron mt9v011 sensor driver");
+MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
+MODULE_LICENSE("GPL");
+
+
+static int debug;
+module_param(debug, int, 0);
+MODULE_PARM_DESC(debug, "Debug level (0-2)");
+
+/* supported controls */
+static struct v4l2_queryctrl mt9v011_qctrl[] = {
+       {
+               .id = V4L2_CID_GAIN,
+               .type = V4L2_CTRL_TYPE_INTEGER,
+               .name = "Gain",
+               .minimum = 0,
+               .maximum = (1 << 10) - 1,
+               .step = 1,
+               .default_value = 0x0020,
+               .flags = 0,
+       }, {
+               .id = V4L2_CID_RED_BALANCE,
+               .type = V4L2_CTRL_TYPE_INTEGER,
+               .name = "Red Balance",
+               .minimum = -1 << 9,
+               .maximum = (1 << 9) - 1,
+               .step = 1,
+               .default_value = 0,
+               .flags = 0,
+       }, {
+               .id = V4L2_CID_BLUE_BALANCE,
+               .type = V4L2_CTRL_TYPE_INTEGER,
+               .name = "Blue Balance",
+               .minimum = -1 << 9,
+               .maximum = (1 << 9) - 1,
+               .step = 1,
+               .default_value = 0,
+               .flags = 0,
+       },
+};
+
+struct mt9v011 {
+       struct v4l2_subdev sd;
+
+       u16 global_gain, red_bal, blue_bal;
+};
+
+static inline struct mt9v011 *to_mt9v011(struct v4l2_subdev *sd)
+{
+       return container_of(sd, struct mt9v011, sd);
+}
+
+static int mt9v011_read(struct v4l2_subdev *sd, unsigned char addr)
+{
+       struct i2c_client *c = v4l2_get_subdevdata(sd);
+       __be16 buffer;
+       int rc, val;
+
+       if (1 != (rc = i2c_master_send(c, &addr, 1)))
+               v4l2_dbg(0, debug, sd,
+                        "i2c i/o error: rc == %d (should be 1)\n", rc);
+
+       msleep(10);
+
+       if (2 != (rc = i2c_master_recv(c, (char *)&buffer, 2)))
+               v4l2_dbg(0, debug, sd,
+                        "i2c i/o error: rc == %d (should be 1)\n", rc);
+
+       val = be16_to_cpu(buffer);
+
+       v4l2_dbg(2, debug, sd, "mt9v011: read 0x%02x = 0x%04x\n", addr, val);
+
+       return val;
+}
+
+static void mt9v011_write(struct v4l2_subdev *sd, unsigned char addr,
+                                u16 value)
+{
+       struct i2c_client *c = v4l2_get_subdevdata(sd);
+       unsigned char buffer[3];
+       int rc;
+
+       buffer[0] = addr;
+       buffer[1] = value >> 8;
+       buffer[2] = value & 0xff;
+
+       v4l2_dbg(2, debug, sd,
+                "mt9v011: writing 0x%02x 0x%04x\n", buffer[0], value);
+       if (3 != (rc = i2c_master_send(c, buffer, 3)))
+               v4l2_dbg(0, debug, sd,
+                        "i2c i/o error: rc == %d (should be 3)\n", rc);
+}
+
+
+struct i2c_reg_value {
+       unsigned char reg;
+       u16           value;
+};
+
+/*
+ * Values used at the original driver
+ * Some values are marked as Reserved at the datasheet
+ */
+static const struct i2c_reg_value mt9v011_init_default[] = {
+                                       /* guessed meaning - as mt9m111 */
+               { R0D_MT9V011_RESET, 0x0001 },
+               { R0D_MT9V011_RESET, 0x0000 },
+               { R01_MT9V011_ROWSTART, 0x0008 },
+               { R02_MT9V011_COLSTART, 0x0014 },
+               { R03_MT9V011_HEIGHT, 0x01e0 },
+               { R04_MT9V011_WIDTH, 0x0280 },
+               { R05_MT9V011_HBLANK, 0x0001 },
+               { R05_MT9V011_HBLANK, 0x0001 },
+               { R0A_MT9V011_CLK_SPEED, 0x0000 },
+               { R05_MT9V011_HBLANK, 0x000a },
+               { 0x30, 0x0005 },
+               { 0x34, 0x0100 },
+               { 0x3d, 0x068f },
+               { 0x40, 0x01e0 },
+               { 0x52, 0x0100 },
+               { 0x58, 0x0038 },       /* Datasheet default 0x0078 */
+               { 0x59, 0x0723 },       /* Datasheet default 0x0703 */
+               { 0x62, 0x041a },       /* Datasheet default 0x0418 */
+               { R09_MT9V011_SHUTTER_WIDTH, 0x0418 },
+               { R20_MT9V011_READ_MODE, 0x1100 },
+};
+
+static void set_balance(struct v4l2_subdev *sd)
+{
+       struct mt9v011 *core = to_mt9v011(sd);
+       u16 green1_gain, green2_gain, blue_gain, red_gain;
+
+       green1_gain = core->global_gain;
+       green2_gain = core->global_gain;
+
+       blue_gain = core->global_gain +
+                   core->global_gain * core->blue_bal / (1 << 9);
+
+       red_gain = core->global_gain +
+                  core->global_gain * core->blue_bal / (1 << 9);
+
+       mt9v011_write(sd, R2B_MT9V011_GREEN_1_GAIN, green1_gain);
+       mt9v011_write(sd, R2E_MT9V011_GREEN_2_GAIN,  green1_gain);
+       mt9v011_write(sd, R2C_MT9V011_BLUE_GAIN, blue_gain);
+       mt9v011_write(sd, R2D_MT9V011_RED_GAIN, red_gain);
+}
+
+static int mt9v011_reset(struct v4l2_subdev *sd, u32 val)
+{
+       u16 version;
+       int i;
+
+       version = mt9v011_read(sd, R00_MT9V011_CHIP_VERSION);
+
+       if (version != MT9V011_VERSION) {
+               v4l2_info(sd, "*** unknown micron chip detected (0x%04x.\n",
+                         version);
+               return -EINVAL;
+
+       }
+
+       for (i = 0; i < ARRAY_SIZE(mt9v011_init_default); i++)
+               mt9v011_write(sd, mt9v011_init_default[i].reg,
+                              mt9v011_init_default[i].value);
+
+       set_balance(sd);
+
+       return 0;
+};
+
+static int mt9v011_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
+{
+       struct mt9v011 *core = to_mt9v011(sd);
+
+       v4l2_dbg(1, debug, sd, "g_ctrl called\n");
+
+       switch (ctrl->id) {
+       case V4L2_CID_GAIN:
+               ctrl->value = core->global_gain;
+               return 0;
+       case V4L2_CID_RED_BALANCE:
+               ctrl->value = core->red_bal;
+               return 0;
+       case V4L2_CID_BLUE_BALANCE:
+               ctrl->value = core->blue_bal;
+               return 0;
+       }
+       return -EINVAL;
+}
+
+static int mt9v011_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
+{
+       struct mt9v011 *core = to_mt9v011(sd);
+       u8 i, n;
+       n = ARRAY_SIZE(mt9v011_qctrl);
+
+       for (i = 0; i < n; i++) {
+               if (ctrl->id != mt9v011_qctrl[i].id)
+                       continue;
+               if (ctrl->value < mt9v011_qctrl[i].minimum ||
+                   ctrl->value > mt9v011_qctrl[i].maximum)
+                       return -ERANGE;
+               v4l2_dbg(1, debug, sd, "s_ctrl: id=%d, value=%d\n",
+                                       ctrl->id, ctrl->value);
+               break;
+       }
+
+       switch (ctrl->id) {
+       case V4L2_CID_GAIN:
+               core->global_gain = ctrl->value;
+               break;
+       case V4L2_CID_RED_BALANCE:
+               core->red_bal = ctrl->value;
+               break;
+       case V4L2_CID_BLUE_BALANCE:
+               core->blue_bal = ctrl->value;
+               break;
+       default:
+               return -EINVAL;
+       }
+
+       set_balance(sd);
+
+       return 0;
+}
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static int mt9v011_g_register(struct v4l2_subdev *sd,
+                             struct v4l2_dbg_register *reg)
+{
+       struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+       if (!v4l2_chip_match_i2c_client(client, &reg->match))
+               return -EINVAL;
+       if (!capable(CAP_SYS_ADMIN))
+               return -EPERM;
+
+       reg->val = mt9v011_read(sd, reg->reg & 0xff);
+       reg->size = 2;
+
+       return 0;
+}
+
+static int mt9v011_s_register(struct v4l2_subdev *sd,
+                             struct v4l2_dbg_register *reg)
+{
+       struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+       if (!v4l2_chip_match_i2c_client(client, &reg->match))
+               return -EINVAL;
+       if (!capable(CAP_SYS_ADMIN))
+               return -EPERM;
+
+       mt9v011_write(sd, reg->reg & 0xff, reg->val & 0xffff);
+
+       return 0;
+}
+#endif
+
+static int mt9v011_g_chip_ident(struct v4l2_subdev *sd,
+                               struct v4l2_dbg_chip_ident *chip)
+{
+       struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+       return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_MT9V011,
+                                         MT9V011_VERSION);
+}
+
+static const struct v4l2_subdev_core_ops mt9v011_core_ops = {
+       .g_ctrl = mt9v011_g_ctrl,
+       .s_ctrl = mt9v011_s_ctrl,
+       .reset = mt9v011_reset,
+       .g_chip_ident = mt9v011_g_chip_ident,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+       .g_register = mt9v011_g_register,
+       .s_register = mt9v011_s_register,
+#endif
+};
+
+static const struct v4l2_subdev_ops mt9v011_ops = {
+       .core = &mt9v011_core_ops,
+};
+
+
+/****************************************************************************
+                       I2C Client & Driver
+ ****************************************************************************/
+
+static int mt9v011_probe(struct i2c_client *c,
+                        const struct i2c_device_id *id)
+{
+       struct mt9v011 *core;
+       struct v4l2_subdev *sd;
+
+       /* Check if the adapter supports the needed features */
+       if (!i2c_check_functionality(c->adapter,
+            I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
+               return -EIO;
+
+       core = kzalloc(sizeof(struct mt9v011), GFP_KERNEL);
+       if (!core)
+               return -ENOMEM;
+
+       core->global_gain = 0x0024;
+
+       sd = &core->sd;
+       v4l2_i2c_subdev_init(sd, c, &mt9v011_ops);
+       v4l_info(c, "chip found @ 0x%02x (%s)\n",
+                c->addr << 1, c->adapter->name);
+
+       return 0;
+}
+
+static int mt9v011_remove(struct i2c_client *c)
+{
+       struct v4l2_subdev *sd = i2c_get_clientdata(c);
+
+       v4l2_dbg(1, debug, sd,
+               "mt9v011.c: removing mt9v011 adapter on address 0x%x\n",
+               c->addr << 1);
+
+       v4l2_device_unregister_subdev(sd);
+       kfree(to_mt9v011(sd));
+       return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static const struct i2c_device_id mt9v011_id[] = {
+       { "mt9v011", 0 },
+       { }
+};
+MODULE_DEVICE_TABLE(i2c, mt9v011_id);
+
+static struct v4l2_i2c_driver_data v4l2_i2c_data = {
+       .name = "mt9v011",
+       .probe = mt9v011_probe,
+       .remove = mt9v011_remove,
+       .id_table = mt9v011_id,
+};
diff --git a/drivers/media/video/mt9v011.h b/drivers/media/video/mt9v011.h
new file mode 100644 (file)
index 0000000..9e443ee
--- /dev/null
@@ -0,0 +1,35 @@
+/*
+ * mt9v011 -Micron 1/4-Inch VGA Digital Image Sensor
+ *
+ * Copyright (c) 2009 Mauro Carvalho Chehab (mchehab@redhat.com)
+ * This code is placed under the terms of the GNU General Public License v2
+ */
+
+#ifndef MT9V011_H_
+#define MT9V011_H_
+
+#define R00_MT9V011_CHIP_VERSION       0x00
+#define R01_MT9V011_ROWSTART           0x01
+#define R02_MT9V011_COLSTART           0x02
+#define R03_MT9V011_HEIGHT             0x03
+#define R04_MT9V011_WIDTH              0x04
+#define R05_MT9V011_HBLANK             0x05
+#define R06_MT9V011_VBLANK             0x06
+#define R07_MT9V011_OUT_CTRL           0x07
+#define R09_MT9V011_SHUTTER_WIDTH      0x09
+#define R0A_MT9V011_CLK_SPEED          0x0a
+#define R0B_MT9V011_RESTART            0x0b
+#define R0C_MT9V011_SHUTTER_DELAY      0x0c
+#define R0D_MT9V011_RESET              0x0d
+#define R1E_MT9V011_DIGITAL_ZOOM       0x1e
+#define R20_MT9V011_READ_MODE          0x20
+#define R2B_MT9V011_GREEN_1_GAIN       0x2b
+#define R2C_MT9V011_BLUE_GAIN          0x2c
+#define R2D_MT9V011_RED_GAIN           0x2d
+#define R2E_MT9V011_GREEN_2_GAIN       0x2e
+#define R35_MT9V011_GLOBAL_GAIN                0x35
+#define RF1_MT9V011_CHIP_ENABLE                0xf1
+
+#define MT9V011_VERSION                        0x8243
+
+#endif
index 4d7e227..11a4a2d 100644 (file)
@@ -155,6 +155,9 @@ enum {
        /* module cafe_ccic, just ident 8801 */
        V4L2_IDENT_CAFE = 8801,
 
+       /* module mt9v011, just ident 8243 */
+       V4L2_IDENT_MT9V011 = 8243,
+
        /* module tw9910: just ident 9910 */
        V4L2_IDENT_TW9910 = 9910,