[media] v4l: Add mt9v032 sensor driver
Detlev Casanova [Tue, 5 Apr 2011 12:06:21 +0000 (09:06 -0300)]
The MT9V032 is a parallel wide VGA sensor from Aptina (formerly Micron)
controlled through I2C.

The driver creates a V4L2 subdevice. It currently supports binning and
cropping, and the gain, auto gain, exposure, auto exposure and test
pattern controls.

Signed-off-by: Detlev Casanova <detlev.casanova@gmail.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/Kconfig
drivers/media/video/Makefile
drivers/media/video/mt9v032.c [new file with mode: 0644]
include/media/mt9v032.h [new file with mode: 0644]

index 00f51dd..3d25920 100644 (file)
@@ -337,6 +337,13 @@ config VIDEO_MT9V011
          mt0v011 1.3 Mpixel camera.  It currently only works with the
          em28xx driver.
 
+config VIDEO_MT9V032
+       tristate "Micron MT9V032 sensor support"
+       depends on I2C && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
+       ---help---
+         This is a Video4Linux2 sensor-level driver for the Micron
+         MT9V032 752x480 CMOS sensor.
+
 config VIDEO_TCM825X
        tristate "TCM825x camera sensor support"
        depends on I2C && VIDEO_V4L2
index ace5d8b..a10e4c3 100644 (file)
@@ -66,6 +66,7 @@ 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-$(CONFIG_VIDEO_MT9V032) += mt9v032.o
 obj-$(CONFIG_VIDEO_SR030PC30)  += sr030pc30.o
 obj-$(CONFIG_VIDEO_NOON010PC30)        += noon010pc30.o
 
diff --git a/drivers/media/video/mt9v032.c b/drivers/media/video/mt9v032.c
new file mode 100644 (file)
index 0000000..1319c2c
--- /dev/null
@@ -0,0 +1,773 @@
+/*
+ * Driver for MT9V032 CMOS Image Sensor from Micron
+ *
+ * Copyright (C) 2010, Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * Based on the MT9M001 driver,
+ *
+ * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/log2.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <linux/videodev2.h>
+#include <linux/v4l2-mediabus.h>
+
+#include <media/mt9v032.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-subdev.h>
+
+#define MT9V032_PIXEL_ARRAY_HEIGHT                     492
+#define MT9V032_PIXEL_ARRAY_WIDTH                      782
+
+#define MT9V032_CHIP_VERSION                           0x00
+#define                MT9V032_CHIP_ID_REV1                    0x1311
+#define                MT9V032_CHIP_ID_REV3                    0x1313
+#define MT9V032_ROW_START                              0x01
+#define                MT9V032_ROW_START_MIN                   4
+#define                MT9V032_ROW_START_DEF                   10
+#define                MT9V032_ROW_START_MAX                   482
+#define MT9V032_COLUMN_START                           0x02
+#define                MT9V032_COLUMN_START_MIN                1
+#define                MT9V032_COLUMN_START_DEF                2
+#define                MT9V032_COLUMN_START_MAX                752
+#define MT9V032_WINDOW_HEIGHT                          0x03
+#define                MT9V032_WINDOW_HEIGHT_MIN               1
+#define                MT9V032_WINDOW_HEIGHT_DEF               480
+#define                MT9V032_WINDOW_HEIGHT_MAX               480
+#define MT9V032_WINDOW_WIDTH                           0x04
+#define                MT9V032_WINDOW_WIDTH_MIN                1
+#define                MT9V032_WINDOW_WIDTH_DEF                752
+#define                MT9V032_WINDOW_WIDTH_MAX                752
+#define MT9V032_HORIZONTAL_BLANKING                    0x05
+#define                MT9V032_HORIZONTAL_BLANKING_MIN         43
+#define                MT9V032_HORIZONTAL_BLANKING_MAX         1023
+#define MT9V032_VERTICAL_BLANKING                      0x06
+#define                MT9V032_VERTICAL_BLANKING_MIN           4
+#define                MT9V032_VERTICAL_BLANKING_MAX           3000
+#define MT9V032_CHIP_CONTROL                           0x07
+#define                MT9V032_CHIP_CONTROL_MASTER_MODE        (1 << 3)
+#define                MT9V032_CHIP_CONTROL_DOUT_ENABLE        (1 << 7)
+#define                MT9V032_CHIP_CONTROL_SEQUENTIAL         (1 << 8)
+#define MT9V032_SHUTTER_WIDTH1                         0x08
+#define MT9V032_SHUTTER_WIDTH2                         0x09
+#define MT9V032_SHUTTER_WIDTH_CONTROL                  0x0a
+#define MT9V032_TOTAL_SHUTTER_WIDTH                    0x0b
+#define                MT9V032_TOTAL_SHUTTER_WIDTH_MIN         1
+#define                MT9V032_TOTAL_SHUTTER_WIDTH_DEF         480
+#define                MT9V032_TOTAL_SHUTTER_WIDTH_MAX         32767
+#define MT9V032_RESET                                  0x0c
+#define MT9V032_READ_MODE                              0x0d
+#define                MT9V032_READ_MODE_ROW_BIN_MASK          (3 << 0)
+#define                MT9V032_READ_MODE_ROW_BIN_SHIFT         0
+#define                MT9V032_READ_MODE_COLUMN_BIN_MASK       (3 << 2)
+#define                MT9V032_READ_MODE_COLUMN_BIN_SHIFT      2
+#define                MT9V032_READ_MODE_ROW_FLIP              (1 << 4)
+#define                MT9V032_READ_MODE_COLUMN_FLIP           (1 << 5)
+#define                MT9V032_READ_MODE_DARK_COLUMNS          (1 << 6)
+#define                MT9V032_READ_MODE_DARK_ROWS             (1 << 7)
+#define MT9V032_PIXEL_OPERATION_MODE                   0x0f
+#define                MT9V032_PIXEL_OPERATION_MODE_COLOR      (1 << 2)
+#define                MT9V032_PIXEL_OPERATION_MODE_HDR        (1 << 6)
+#define MT9V032_ANALOG_GAIN                            0x35
+#define                MT9V032_ANALOG_GAIN_MIN                 16
+#define                MT9V032_ANALOG_GAIN_DEF                 16
+#define                MT9V032_ANALOG_GAIN_MAX                 64
+#define MT9V032_MAX_ANALOG_GAIN                                0x36
+#define                MT9V032_MAX_ANALOG_GAIN_MAX             127
+#define MT9V032_FRAME_DARK_AVERAGE                     0x42
+#define MT9V032_DARK_AVG_THRESH                                0x46
+#define                MT9V032_DARK_AVG_LOW_THRESH_MASK        (255 << 0)
+#define                MT9V032_DARK_AVG_LOW_THRESH_SHIFT       0
+#define                MT9V032_DARK_AVG_HIGH_THRESH_MASK       (255 << 8)
+#define                MT9V032_DARK_AVG_HIGH_THRESH_SHIFT      8
+#define MT9V032_ROW_NOISE_CORR_CONTROL                 0x70
+#define                MT9V032_ROW_NOISE_CORR_ENABLE           (1 << 5)
+#define                MT9V032_ROW_NOISE_CORR_USE_BLK_AVG      (1 << 7)
+#define MT9V032_PIXEL_CLOCK                            0x74
+#define                MT9V032_PIXEL_CLOCK_INV_LINE            (1 << 0)
+#define                MT9V032_PIXEL_CLOCK_INV_FRAME           (1 << 1)
+#define                MT9V032_PIXEL_CLOCK_XOR_LINE            (1 << 2)
+#define                MT9V032_PIXEL_CLOCK_CONT_LINE           (1 << 3)
+#define                MT9V032_PIXEL_CLOCK_INV_PXL_CLK         (1 << 4)
+#define MT9V032_TEST_PATTERN                           0x7f
+#define                MT9V032_TEST_PATTERN_DATA_MASK          (1023 << 0)
+#define                MT9V032_TEST_PATTERN_DATA_SHIFT         0
+#define                MT9V032_TEST_PATTERN_USE_DATA           (1 << 10)
+#define                MT9V032_TEST_PATTERN_GRAY_MASK          (3 << 11)
+#define                MT9V032_TEST_PATTERN_GRAY_NONE          (0 << 11)
+#define                MT9V032_TEST_PATTERN_GRAY_VERTICAL      (1 << 11)
+#define                MT9V032_TEST_PATTERN_GRAY_HORIZONTAL    (2 << 11)
+#define                MT9V032_TEST_PATTERN_GRAY_DIAGONAL      (3 << 11)
+#define                MT9V032_TEST_PATTERN_ENABLE             (1 << 13)
+#define                MT9V032_TEST_PATTERN_FLIP               (1 << 14)
+#define MT9V032_AEC_AGC_ENABLE                         0xaf
+#define                MT9V032_AEC_ENABLE                      (1 << 0)
+#define                MT9V032_AGC_ENABLE                      (1 << 1)
+#define MT9V032_THERMAL_INFO                           0xc1
+
+struct mt9v032 {
+       struct v4l2_subdev subdev;
+       struct media_pad pad;
+
+       struct v4l2_mbus_framefmt format;
+       struct v4l2_rect crop;
+
+       struct v4l2_ctrl_handler ctrls;
+
+       struct mutex power_lock;
+       int power_count;
+
+       struct mt9v032_platform_data *pdata;
+       u16 chip_control;
+       u16 aec_agc;
+};
+
+static struct mt9v032 *to_mt9v032(struct v4l2_subdev *sd)
+{
+       return container_of(sd, struct mt9v032, subdev);
+}
+
+static int mt9v032_read(struct i2c_client *client, const u8 reg)
+{
+       s32 data = i2c_smbus_read_word_data(client, reg);
+       dev_dbg(&client->dev, "%s: read 0x%04x from 0x%02x\n", __func__,
+               swab16(data), reg);
+       return data < 0 ? data : swab16(data);
+}
+
+static int mt9v032_write(struct i2c_client *client, const u8 reg,
+                        const u16 data)
+{
+       dev_dbg(&client->dev, "%s: writing 0x%04x to 0x%02x\n", __func__,
+               data, reg);
+       return i2c_smbus_write_word_data(client, reg, swab16(data));
+}
+
+static int mt9v032_set_chip_control(struct mt9v032 *mt9v032, u16 clear, u16 set)
+{
+       struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev);
+       u16 value = (mt9v032->chip_control & ~clear) | set;
+       int ret;
+
+       ret = mt9v032_write(client, MT9V032_CHIP_CONTROL, value);
+       if (ret < 0)
+               return ret;
+
+       mt9v032->chip_control = value;
+       return 0;
+}
+
+static int
+mt9v032_update_aec_agc(struct mt9v032 *mt9v032, u16 which, int enable)
+{
+       struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev);
+       u16 value = mt9v032->aec_agc;
+       int ret;
+
+       if (enable)
+               value |= which;
+       else
+               value &= ~which;
+
+       ret = mt9v032_write(client, MT9V032_AEC_AGC_ENABLE, value);
+       if (ret < 0)
+               return ret;
+
+       mt9v032->aec_agc = value;
+       return 0;
+}
+
+static int mt9v032_power_on(struct mt9v032 *mt9v032)
+{
+       struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev);
+       int ret;
+
+       if (mt9v032->pdata->set_clock) {
+               mt9v032->pdata->set_clock(&mt9v032->subdev, 25000000);
+               udelay(1);
+       }
+
+       /* Reset the chip and stop data read out */
+       ret = mt9v032_write(client, MT9V032_RESET, 1);
+       if (ret < 0)
+               return ret;
+
+       ret = mt9v032_write(client, MT9V032_RESET, 0);
+       if (ret < 0)
+               return ret;
+
+       return mt9v032_write(client, MT9V032_CHIP_CONTROL, 0);
+}
+
+static void mt9v032_power_off(struct mt9v032 *mt9v032)
+{
+       if (mt9v032->pdata->set_clock)
+               mt9v032->pdata->set_clock(&mt9v032->subdev, 0);
+}
+
+static int __mt9v032_set_power(struct mt9v032 *mt9v032, bool on)
+{
+       struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev);
+       int ret;
+
+       if (!on) {
+               mt9v032_power_off(mt9v032);
+               return 0;
+       }
+
+       ret = mt9v032_power_on(mt9v032);
+       if (ret < 0)
+               return ret;
+
+       /* Configure the pixel clock polarity */
+       if (mt9v032->pdata && mt9v032->pdata->clk_pol) {
+               ret = mt9v032_write(client, MT9V032_PIXEL_CLOCK,
+                               MT9V032_PIXEL_CLOCK_INV_PXL_CLK);
+               if (ret < 0)
+                       return ret;
+       }
+
+       /* Disable the noise correction algorithm and restore the controls. */
+       ret = mt9v032_write(client, MT9V032_ROW_NOISE_CORR_CONTROL, 0);
+       if (ret < 0)
+               return ret;
+
+       return v4l2_ctrl_handler_setup(&mt9v032->ctrls);
+}
+
+/* -----------------------------------------------------------------------------
+ * V4L2 subdev video operations
+ */
+
+static struct v4l2_mbus_framefmt *
+__mt9v032_get_pad_format(struct mt9v032 *mt9v032, struct v4l2_subdev_fh *fh,
+                        unsigned int pad, enum v4l2_subdev_format_whence which)
+{
+       switch (which) {
+       case V4L2_SUBDEV_FORMAT_TRY:
+               return v4l2_subdev_get_try_format(fh, pad);
+       case V4L2_SUBDEV_FORMAT_ACTIVE:
+               return &mt9v032->format;
+       default:
+               return NULL;
+       }
+}
+
+static struct v4l2_rect *
+__mt9v032_get_pad_crop(struct mt9v032 *mt9v032, struct v4l2_subdev_fh *fh,
+                      unsigned int pad, enum v4l2_subdev_format_whence which)
+{
+       switch (which) {
+       case V4L2_SUBDEV_FORMAT_TRY:
+               return v4l2_subdev_get_try_crop(fh, pad);
+       case V4L2_SUBDEV_FORMAT_ACTIVE:
+               return &mt9v032->crop;
+       default:
+               return NULL;
+       }
+}
+
+static int mt9v032_s_stream(struct v4l2_subdev *subdev, int enable)
+{
+       const u16 mode = MT9V032_CHIP_CONTROL_MASTER_MODE
+                      | MT9V032_CHIP_CONTROL_DOUT_ENABLE
+                      | MT9V032_CHIP_CONTROL_SEQUENTIAL;
+       struct i2c_client *client = v4l2_get_subdevdata(subdev);
+       struct mt9v032 *mt9v032 = to_mt9v032(subdev);
+       struct v4l2_mbus_framefmt *format = &mt9v032->format;
+       struct v4l2_rect *crop = &mt9v032->crop;
+       unsigned int hratio;
+       unsigned int vratio;
+       int ret;
+
+       if (!enable)
+               return mt9v032_set_chip_control(mt9v032, mode, 0);
+
+       /* Configure the window size and row/column bin */
+       hratio = DIV_ROUND_CLOSEST(crop->width, format->width);
+       vratio = DIV_ROUND_CLOSEST(crop->height, format->height);
+
+       ret = mt9v032_write(client, MT9V032_READ_MODE,
+                   (hratio - 1) << MT9V032_READ_MODE_ROW_BIN_SHIFT |
+                   (vratio - 1) << MT9V032_READ_MODE_COLUMN_BIN_SHIFT);
+       if (ret < 0)
+               return ret;
+
+       ret = mt9v032_write(client, MT9V032_COLUMN_START, crop->left);
+       if (ret < 0)
+               return ret;
+
+       ret = mt9v032_write(client, MT9V032_ROW_START, crop->top);
+       if (ret < 0)
+               return ret;
+
+       ret = mt9v032_write(client, MT9V032_WINDOW_WIDTH, crop->width);
+       if (ret < 0)
+               return ret;
+
+       ret = mt9v032_write(client, MT9V032_WINDOW_HEIGHT, crop->height);
+       if (ret < 0)
+               return ret;
+
+       ret = mt9v032_write(client, MT9V032_HORIZONTAL_BLANKING,
+                           max(43, 660 - crop->width));
+       if (ret < 0)
+               return ret;
+
+       /* Switch to master "normal" mode */
+       return mt9v032_set_chip_control(mt9v032, 0, mode);
+}
+
+static int mt9v032_enum_mbus_code(struct v4l2_subdev *subdev,
+                                 struct v4l2_subdev_fh *fh,
+                                 struct v4l2_subdev_mbus_code_enum *code)
+{
+       if (code->index > 0)
+               return -EINVAL;
+
+       code->code = V4L2_MBUS_FMT_SGRBG10_1X10;
+       return 0;
+}
+
+static int mt9v032_enum_frame_size(struct v4l2_subdev *subdev,
+                                  struct v4l2_subdev_fh *fh,
+                                  struct v4l2_subdev_frame_size_enum *fse)
+{
+       if (fse->index >= 8 || fse->code != V4L2_MBUS_FMT_SGRBG10_1X10)
+               return -EINVAL;
+
+       fse->min_width = MT9V032_WINDOW_WIDTH_DEF / fse->index;
+       fse->max_width = fse->min_width;
+       fse->min_height = MT9V032_WINDOW_HEIGHT_DEF / fse->index;
+       fse->max_height = fse->min_height;
+
+       return 0;
+}
+
+static int mt9v032_get_format(struct v4l2_subdev *subdev,
+                             struct v4l2_subdev_fh *fh,
+                             struct v4l2_subdev_format *format)
+{
+       struct mt9v032 *mt9v032 = to_mt9v032(subdev);
+
+       format->format = *__mt9v032_get_pad_format(mt9v032, fh, format->pad,
+                                                  format->which);
+       return 0;
+}
+
+static int mt9v032_set_format(struct v4l2_subdev *subdev,
+                             struct v4l2_subdev_fh *fh,
+                             struct v4l2_subdev_format *format)
+{
+       struct mt9v032 *mt9v032 = to_mt9v032(subdev);
+       struct v4l2_mbus_framefmt *__format;
+       struct v4l2_rect *__crop;
+       unsigned int width;
+       unsigned int height;
+       unsigned int hratio;
+       unsigned int vratio;
+
+       __crop = __mt9v032_get_pad_crop(mt9v032, fh, format->pad,
+                                       format->which);
+
+       /* Clamp the width and height to avoid dividing by zero. */
+       width = clamp_t(unsigned int, ALIGN(format->format.width, 2),
+                       max(__crop->width / 8, MT9V032_WINDOW_WIDTH_MIN),
+                       __crop->width);
+       height = clamp_t(unsigned int, ALIGN(format->format.height, 2),
+                        max(__crop->height / 8, MT9V032_WINDOW_HEIGHT_MIN),
+                        __crop->height);
+
+       hratio = DIV_ROUND_CLOSEST(__crop->width, width);
+       vratio = DIV_ROUND_CLOSEST(__crop->height, height);
+
+       __format = __mt9v032_get_pad_format(mt9v032, fh, format->pad,
+                                           format->which);
+       __format->width = __crop->width / hratio;
+       __format->height = __crop->height / vratio;
+
+       format->format = *__format;
+
+       return 0;
+}
+
+static int mt9v032_get_crop(struct v4l2_subdev *subdev,
+                           struct v4l2_subdev_fh *fh,
+                           struct v4l2_subdev_crop *crop)
+{
+       struct mt9v032 *mt9v032 = to_mt9v032(subdev);
+
+       crop->rect = *__mt9v032_get_pad_crop(mt9v032, fh, crop->pad,
+                                            crop->which);
+       return 0;
+}
+
+static int mt9v032_set_crop(struct v4l2_subdev *subdev,
+                           struct v4l2_subdev_fh *fh,
+                           struct v4l2_subdev_crop *crop)
+{
+       struct mt9v032 *mt9v032 = to_mt9v032(subdev);
+       struct v4l2_mbus_framefmt *__format;
+       struct v4l2_rect *__crop;
+       struct v4l2_rect rect;
+
+       /* Clamp the crop rectangle boundaries and align them to a multiple of 2
+        * pixels.
+        */
+       rect.left = clamp(ALIGN(crop->rect.left, 2),
+                         MT9V032_COLUMN_START_MIN,
+                         MT9V032_COLUMN_START_MAX);
+       rect.top = clamp(ALIGN(crop->rect.top, 2),
+                        MT9V032_ROW_START_MIN,
+                        MT9V032_ROW_START_MAX);
+       rect.width = clamp(ALIGN(crop->rect.width, 2),
+                          MT9V032_WINDOW_WIDTH_MIN,
+                          MT9V032_WINDOW_WIDTH_MAX);
+       rect.height = clamp(ALIGN(crop->rect.height, 2),
+                           MT9V032_WINDOW_HEIGHT_MIN,
+                           MT9V032_WINDOW_HEIGHT_MAX);
+
+       rect.width = min(rect.width, MT9V032_PIXEL_ARRAY_WIDTH - rect.left);
+       rect.height = min(rect.height, MT9V032_PIXEL_ARRAY_HEIGHT - rect.top);
+
+       __crop = __mt9v032_get_pad_crop(mt9v032, fh, crop->pad, crop->which);
+
+       if (rect.width != __crop->width || rect.height != __crop->height) {
+               /* Reset the output image size if the crop rectangle size has
+                * been modified.
+                */
+               __format = __mt9v032_get_pad_format(mt9v032, fh, crop->pad,
+                                                   crop->which);
+               __format->width = rect.width;
+               __format->height = rect.height;
+       }
+
+       *__crop = rect;
+       crop->rect = rect;
+
+       return 0;
+}
+
+/* -----------------------------------------------------------------------------
+ * V4L2 subdev control operations
+ */
+
+#define V4L2_CID_TEST_PATTERN          (V4L2_CID_USER_BASE | 0x1001)
+
+static int mt9v032_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+       struct mt9v032 *mt9v032 =
+                       container_of(ctrl->handler, struct mt9v032, ctrls);
+       struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev);
+       u16 data;
+
+       switch (ctrl->id) {
+       case V4L2_CID_AUTOGAIN:
+               return mt9v032_update_aec_agc(mt9v032, MT9V032_AGC_ENABLE,
+                                             ctrl->val);
+
+       case V4L2_CID_GAIN:
+               return mt9v032_write(client, MT9V032_ANALOG_GAIN, ctrl->val);
+
+       case V4L2_CID_EXPOSURE_AUTO:
+               return mt9v032_update_aec_agc(mt9v032, MT9V032_AEC_ENABLE,
+                                             ctrl->val);
+
+       case V4L2_CID_EXPOSURE:
+               return mt9v032_write(client, MT9V032_TOTAL_SHUTTER_WIDTH,
+                                    ctrl->val);
+
+       case V4L2_CID_TEST_PATTERN:
+               switch (ctrl->val) {
+               case 0:
+                       data = 0;
+                       break;
+               case 1:
+                       data = MT9V032_TEST_PATTERN_GRAY_VERTICAL
+                            | MT9V032_TEST_PATTERN_ENABLE;
+                       break;
+               case 2:
+                       data = MT9V032_TEST_PATTERN_GRAY_HORIZONTAL
+                            | MT9V032_TEST_PATTERN_ENABLE;
+                       break;
+               case 3:
+                       data = MT9V032_TEST_PATTERN_GRAY_DIAGONAL
+                            | MT9V032_TEST_PATTERN_ENABLE;
+                       break;
+               default:
+                       data = (ctrl->val << MT9V032_TEST_PATTERN_DATA_SHIFT)
+                            | MT9V032_TEST_PATTERN_USE_DATA
+                            | MT9V032_TEST_PATTERN_ENABLE
+                            | MT9V032_TEST_PATTERN_FLIP;
+                       break;
+               }
+
+               return mt9v032_write(client, MT9V032_TEST_PATTERN, data);
+       }
+
+       return 0;
+}
+
+static struct v4l2_ctrl_ops mt9v032_ctrl_ops = {
+       .s_ctrl = mt9v032_s_ctrl,
+};
+
+static const struct v4l2_ctrl_config mt9v032_ctrls[] = {
+       {
+               .ops            = &mt9v032_ctrl_ops,
+               .id             = V4L2_CID_TEST_PATTERN,
+               .type           = V4L2_CTRL_TYPE_INTEGER,
+               .name           = "Test pattern",
+               .min            = 0,
+               .max            = 1023,
+               .step           = 1,
+               .def            = 0,
+               .flags          = 0,
+       }
+};
+
+/* -----------------------------------------------------------------------------
+ * V4L2 subdev core operations
+ */
+
+static int mt9v032_set_power(struct v4l2_subdev *subdev, int on)
+{
+       struct mt9v032 *mt9v032 = to_mt9v032(subdev);
+       int ret = 0;
+
+       mutex_lock(&mt9v032->power_lock);
+
+       /* If the power count is modified from 0 to != 0 or from != 0 to 0,
+        * update the power state.
+        */
+       if (mt9v032->power_count == !on) {
+               ret = __mt9v032_set_power(mt9v032, !!on);
+               if (ret < 0)
+                       goto done;
+       }
+
+       /* Update the power count. */
+       mt9v032->power_count += on ? 1 : -1;
+       WARN_ON(mt9v032->power_count < 0);
+
+done:
+       mutex_unlock(&mt9v032->power_lock);
+       return ret;
+}
+
+/* -----------------------------------------------------------------------------
+ * V4L2 subdev internal operations
+ */
+
+static int mt9v032_registered(struct v4l2_subdev *subdev)
+{
+       struct i2c_client *client = v4l2_get_subdevdata(subdev);
+       struct mt9v032 *mt9v032 = to_mt9v032(subdev);
+       s32 data;
+       int ret;
+
+       dev_info(&client->dev, "Probing MT9V032 at address 0x%02x\n",
+                       client->addr);
+
+       ret = mt9v032_power_on(mt9v032);
+       if (ret < 0) {
+               dev_err(&client->dev, "MT9V032 power up failed\n");
+               return ret;
+       }
+
+       /* Read and check the sensor version */
+       data = mt9v032_read(client, MT9V032_CHIP_VERSION);
+       if (data != MT9V032_CHIP_ID_REV1 && data != MT9V032_CHIP_ID_REV3) {
+               dev_err(&client->dev, "MT9V032 not detected, wrong version "
+                               "0x%04x\n", data);
+               return -ENODEV;
+       }
+
+       mt9v032_power_off(mt9v032);
+
+       dev_info(&client->dev, "MT9V032 detected at address 0x%02x\n",
+                       client->addr);
+
+       return ret;
+}
+
+static int mt9v032_open(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh)
+{
+       struct v4l2_mbus_framefmt *format;
+       struct v4l2_rect *crop;
+
+       crop = v4l2_subdev_get_try_crop(fh, 0);
+       crop->left = MT9V032_COLUMN_START_DEF;
+       crop->top = MT9V032_ROW_START_DEF;
+       crop->width = MT9V032_WINDOW_WIDTH_DEF;
+       crop->height = MT9V032_WINDOW_HEIGHT_DEF;
+
+       format = v4l2_subdev_get_try_format(fh, 0);
+       format->code = V4L2_MBUS_FMT_SGRBG10_1X10;
+       format->width = MT9V032_WINDOW_WIDTH_DEF;
+       format->height = MT9V032_WINDOW_HEIGHT_DEF;
+       format->field = V4L2_FIELD_NONE;
+       format->colorspace = V4L2_COLORSPACE_SRGB;
+
+       return mt9v032_set_power(subdev, 1);
+}
+
+static int mt9v032_close(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh)
+{
+       return mt9v032_set_power(subdev, 0);
+}
+
+static struct v4l2_subdev_core_ops mt9v032_subdev_core_ops = {
+       .s_power        = mt9v032_set_power,
+};
+
+static struct v4l2_subdev_video_ops mt9v032_subdev_video_ops = {
+       .s_stream       = mt9v032_s_stream,
+};
+
+static struct v4l2_subdev_pad_ops mt9v032_subdev_pad_ops = {
+       .enum_mbus_code = mt9v032_enum_mbus_code,
+       .enum_frame_size = mt9v032_enum_frame_size,
+       .get_fmt = mt9v032_get_format,
+       .set_fmt = mt9v032_set_format,
+       .get_crop = mt9v032_get_crop,
+       .set_crop = mt9v032_set_crop,
+};
+
+static struct v4l2_subdev_ops mt9v032_subdev_ops = {
+       .core   = &mt9v032_subdev_core_ops,
+       .video  = &mt9v032_subdev_video_ops,
+       .pad    = &mt9v032_subdev_pad_ops,
+};
+
+static const struct v4l2_subdev_internal_ops mt9v032_subdev_internal_ops = {
+       .registered = mt9v032_registered,
+       .open = mt9v032_open,
+       .close = mt9v032_close,
+};
+
+/* -----------------------------------------------------------------------------
+ * Driver initialization and probing
+ */
+
+static int mt9v032_probe(struct i2c_client *client,
+               const struct i2c_device_id *did)
+{
+       struct mt9v032 *mt9v032;
+       unsigned int i;
+       int ret;
+
+       if (!i2c_check_functionality(client->adapter,
+                                    I2C_FUNC_SMBUS_WORD_DATA)) {
+               dev_warn(&client->adapter->dev,
+                        "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
+               return -EIO;
+       }
+
+       mt9v032 = kzalloc(sizeof(*mt9v032), GFP_KERNEL);
+       if (!mt9v032)
+               return -ENOMEM;
+
+       mutex_init(&mt9v032->power_lock);
+       mt9v032->pdata = client->dev.platform_data;
+
+       v4l2_ctrl_handler_init(&mt9v032->ctrls, ARRAY_SIZE(mt9v032_ctrls) + 4);
+
+       v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops,
+                         V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
+       v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops,
+                         V4L2_CID_GAIN, MT9V032_ANALOG_GAIN_MIN,
+                         MT9V032_ANALOG_GAIN_MAX, 1, MT9V032_ANALOG_GAIN_DEF);
+       v4l2_ctrl_new_std_menu(&mt9v032->ctrls, &mt9v032_ctrl_ops,
+                              V4L2_CID_EXPOSURE_AUTO, V4L2_EXPOSURE_MANUAL, 0,
+                              V4L2_EXPOSURE_AUTO);
+       v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops,
+                         V4L2_CID_EXPOSURE, MT9V032_TOTAL_SHUTTER_WIDTH_MIN,
+                         MT9V032_TOTAL_SHUTTER_WIDTH_MAX, 1,
+                         MT9V032_TOTAL_SHUTTER_WIDTH_DEF);
+
+       for (i = 0; i < ARRAY_SIZE(mt9v032_ctrls); ++i)
+               v4l2_ctrl_new_custom(&mt9v032->ctrls, &mt9v032_ctrls[i], NULL);
+
+       mt9v032->subdev.ctrl_handler = &mt9v032->ctrls;
+
+       if (mt9v032->ctrls.error)
+               printk(KERN_INFO "%s: control initialization error %d\n",
+                      __func__, mt9v032->ctrls.error);
+
+       mt9v032->crop.left = MT9V032_COLUMN_START_DEF;
+       mt9v032->crop.top = MT9V032_ROW_START_DEF;
+       mt9v032->crop.width = MT9V032_WINDOW_WIDTH_DEF;
+       mt9v032->crop.height = MT9V032_WINDOW_HEIGHT_DEF;
+
+       mt9v032->format.code = V4L2_MBUS_FMT_SGRBG10_1X10;
+       mt9v032->format.width = MT9V032_WINDOW_WIDTH_DEF;
+       mt9v032->format.height = MT9V032_WINDOW_HEIGHT_DEF;
+       mt9v032->format.field = V4L2_FIELD_NONE;
+       mt9v032->format.colorspace = V4L2_COLORSPACE_SRGB;
+
+       mt9v032->aec_agc = MT9V032_AEC_ENABLE | MT9V032_AGC_ENABLE;
+
+       v4l2_i2c_subdev_init(&mt9v032->subdev, client, &mt9v032_subdev_ops);
+       mt9v032->subdev.internal_ops = &mt9v032_subdev_internal_ops;
+       mt9v032->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+
+       mt9v032->pad.flags = MEDIA_PAD_FL_SOURCE;
+       ret = media_entity_init(&mt9v032->subdev.entity, 1, &mt9v032->pad, 0);
+       if (ret < 0)
+               kfree(mt9v032);
+
+       return ret;
+}
+
+static int mt9v032_remove(struct i2c_client *client)
+{
+       struct v4l2_subdev *subdev = i2c_get_clientdata(client);
+       struct mt9v032 *mt9v032 = to_mt9v032(subdev);
+
+       v4l2_device_unregister_subdev(subdev);
+       media_entity_cleanup(&subdev->entity);
+       kfree(mt9v032);
+       return 0;
+}
+
+static const struct i2c_device_id mt9v032_id[] = {
+       { "mt9v032", 0 },
+       { }
+};
+MODULE_DEVICE_TABLE(i2c, mt9v032_id);
+
+static struct i2c_driver mt9v032_driver = {
+       .driver = {
+               .name = "mt9v032",
+       },
+       .probe          = mt9v032_probe,
+       .remove         = mt9v032_remove,
+       .id_table       = mt9v032_id,
+};
+
+static int __init mt9v032_init(void)
+{
+       return i2c_add_driver(&mt9v032_driver);
+}
+
+static void __exit mt9v032_exit(void)
+{
+       i2c_del_driver(&mt9v032_driver);
+}
+
+module_init(mt9v032_init);
+module_exit(mt9v032_exit);
+
+MODULE_DESCRIPTION("Aptina MT9V032 Camera driver");
+MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
+MODULE_LICENSE("GPL");
diff --git a/include/media/mt9v032.h b/include/media/mt9v032.h
new file mode 100644 (file)
index 0000000..5e27f9b
--- /dev/null
@@ -0,0 +1,12 @@
+#ifndef _MEDIA_MT9V032_H
+#define _MEDIA_MT9V032_H
+
+struct v4l2_subdev;
+
+struct mt9v032_platform_data {
+       unsigned int clk_pol:1;
+
+       void (*set_clock)(struct v4l2_subdev *subdev, unsigned int rate);
+};
+
+#endif