@@ -329,6 +329,13 @@ config VIDEO_OV7670
OV7670 VGA camera. It currently only works with the M88ALP01
controller.
+config VIDEO_MT9P031
+ tristate "Aptina MT9P031 support"
+ depends on I2C && VIDEO_V4L2
+ ---help---
+ This is a Video4Linux2 sensor-level driver for the Aptina
+ (Micron) mt9p031 5 Mpixel camera.
+
config VIDEO_MT9V011
tristate "Micron mt9v011 sensor support"
depends on I2C && VIDEO_V4L2
@@ -65,6 +65,7 @@ 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-$(CONFIG_VIDEO_MT9P031) += mt9p031.o
obj-$(CONFIG_VIDEO_MT9V011) += mt9v011.o
obj-$(CONFIG_VIDEO_SR030PC30) += sr030pc30.o
obj-$(CONFIG_VIDEO_NOON010PC30) += noon010pc30.o
new file mode 100644
@@ -0,0 +1,841 @@
+/*
+ * Driver for MT9P031 CMOS Image Sensor from Aptina
+ *
+ * Copyright (C) 2011, Javier Martin <javier.martin@vista-silicon.com>
+ *
+ * Copyright (C) 2011, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
+ *
+ * Based on the MT9V032 driver and Bastian Hecht's code.
+ *
+ * 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/device.h>
+#include <linux/i2c.h>
+#include <linux/log2.h>
+#include <linux/pm.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <media/v4l2-subdev.h>
+#include <linux/videodev2.h>
+
+#include <media/mt9p031.h>
+#include <media/v4l2-chip-ident.h>
+#include <media/v4l2-subdev.h>
+#include <media/v4l2-device.h>
+
+#define MT9P031_PIXCLK_FREQ 54000000
+
+/* mt9p031 selected register addresses */
+#define MT9P031_CHIP_VERSION 0x00
+#define MT9P031_CHIP_VERSION_VALUE 0x1801
+#define MT9P031_ROW_START 0x01
+#define MT9P031_ROW_START_DEF 54
+#define MT9P031_COLUMN_START 0x02
+#define MT9P031_COLUMN_START_DEF 16
+#define MT9P031_WINDOW_HEIGHT 0x03
+#define MT9P031_WINDOW_WIDTH 0x04
+#define MT9P031_H_BLANKING 0x05
+#define MT9P031_H_BLANKING_VALUE 0
+#define MT9P031_V_BLANKING 0x06
+#define MT9P031_V_BLANKING_VALUE 25
+#define MT9P031_OUTPUT_CONTROL 0x07
+#define MT9P031_OUTPUT_CONTROL_CEN 2
+#define MT9P031_OUTPUT_CONTROL_SYN 1
+#define MT9P031_SHUTTER_WIDTH_UPPER 0x08
+#define MT9P031_SHUTTER_WIDTH 0x09
+#define MT9P031_PIXEL_CLOCK_CONTROL 0x0a
+#define MT9P031_FRAME_RESTART 0x0b
+#define MT9P031_SHUTTER_DELAY 0x0c
+#define MT9P031_RST 0x0d
+#define MT9P031_RST_ENABLE 1
+#define MT9P031_RST_DISABLE 0
+#define MT9P031_READ_MODE_1 0x1e
+#define MT9P031_READ_MODE_2 0x20
+#define MT9P031_READ_MODE_2_ROW_MIR 0x8000
+#define MT9P031_READ_MODE_2_COL_MIR 0x4000
+#define MT9P031_ROW_ADDRESS_MODE 0x22
+#define MT9P031_COLUMN_ADDRESS_MODE 0x23
+#define MT9P031_GLOBAL_GAIN 0x35
+
+#define MT9P031_WINDOW_HEIGHT_MAX 1944
+#define MT9P031_WINDOW_WIDTH_MAX 2592
+#define MT9P031_WINDOW_HEIGHT_MIN 2
+#define MT9P031_WINDOW_WIDTH_MIN 18
+
+struct mt9p031 {
+ struct v4l2_subdev subdev;
+ struct media_pad pad;
+ struct v4l2_rect rect; /* Sensor window */
+ struct v4l2_mbus_framefmt format;
+ struct mt9p031_platform_data *pdata;
+ struct mutex power_lock; /* lock to protect power_count */
+ int power_count;
+ u16 xskip;
+ u16 yskip;
+ /* cache register values */
+ u16 output_control;
+ u16 h_blanking;
+ u16 v_blanking;
+ u16 column_address_mode;
+ u16 row_address_mode;
+ u16 column_start;
+ u16 row_start;
+ u16 window_width;
+ u16 window_height;
+ struct regulator *reg_1v8;
+ struct regulator *reg_2v8;
+};
+
+static struct mt9p031 *to_mt9p031(const struct i2c_client *client)
+{
+ return container_of(i2c_get_clientdata(client), struct mt9p031, subdev);
+}
+
+static int reg_read(struct i2c_client *client, const u8 reg)
+{
+ s32 data = i2c_smbus_read_word_data(client, reg);
+ return data < 0 ? data : swab16(data);
+}
+
+static int reg_write(struct i2c_client *client, const u8 reg,
+ const u16 data)
+{
+ return i2c_smbus_write_word_data(client, reg, swab16(data));
+}
+
+static int reg_write_cached(struct i2c_client *client, const u8 reg,
+ const u16 data, u16 *cache)
+{
+ int ret;
+
+ ret = reg_write(client, reg, data);
+ if (ret < 0)
+ return ret;
+ *cache = data;
+ return 0;
+}
+
+static int mt9p031_set_output_control(struct mt9p031 *mt9p031, u16 clear,
+ u16 set)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
+ u16 value = (mt9p031->output_control & ~clear) | set;
+
+ return reg_write_cached(client, MT9P031_OUTPUT_CONTROL, value,
+ &mt9p031->output_control);
+}
+
+static int restore_registers(struct i2c_client *client)
+{
+ int ret;
+ struct mt9p031 *mt9p031 = to_mt9p031(client);
+
+ /* Disable register update, reconfigure atomically */
+ ret = mt9p031_set_output_control(mt9p031, 0,
+ MT9P031_OUTPUT_CONTROL_SYN);
+ if (ret < 0)
+ return ret;
+
+ /* Blanking and start values - default... */
+ ret = reg_write(client, MT9P031_H_BLANKING, mt9p031->h_blanking);
+ if (ret < 0)
+ return ret;
+
+ ret = reg_write(client, MT9P031_V_BLANKING, mt9p031->v_blanking);
+ if (ret < 0)
+ return ret;
+
+ ret = reg_write(client, MT9P031_COLUMN_ADDRESS_MODE,
+ mt9p031->column_address_mode);
+ if (ret < 0)
+ return ret;
+
+ ret = reg_write(client, MT9P031_ROW_ADDRESS_MODE,
+ mt9p031->row_address_mode);
+ if (ret < 0)
+ return ret;
+
+ ret = reg_write(client, MT9P031_COLUMN_START,
+ mt9p031->column_start);
+ if (ret < 0)
+ return ret;
+
+ ret = reg_write(client, MT9P031_ROW_START,
+ mt9p031->row_start);
+ if (ret < 0)
+ return ret;
+
+ ret = reg_write(client, MT9P031_WINDOW_WIDTH,
+ mt9p031->window_width);
+ if (ret < 0)
+ return ret;
+
+ ret = reg_write(client, MT9P031_WINDOW_HEIGHT,
+ mt9p031->window_height);
+ if (ret < 0)
+ return ret;
+
+ /* Re-enable register update, commit all changes */
+ ret = mt9p031_set_output_control(mt9p031,
+ MT9P031_OUTPUT_CONTROL_SYN, 0);
+ if (ret < 0)
+ return ret;
+ return 0;
+}
+
+static int mt9p031_reset(struct i2c_client *client)
+{
+ struct mt9p031 *mt9p031 = to_mt9p031(client);
+ int ret;
+
+ /* Disable chip output, synchronous option update */
+ ret = reg_write(client, MT9P031_RST, MT9P031_RST_ENABLE);
+ if (ret < 0)
+ return ret;
+ ret = reg_write(client, MT9P031_RST, MT9P031_RST_DISABLE);
+ if (ret < 0)
+ return ret;
+ return mt9p031_set_output_control(mt9p031,
+ MT9P031_OUTPUT_CONTROL_CEN, 0);
+}
+
+static int mt9p031_power_on(struct mt9p031 *mt9p031)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
+ int ret;
+
+ /* Ensure RESET_BAR is low */
+ if (mt9p031->pdata->reset)
+ mt9p031->pdata->reset(&mt9p031->subdev, 1);
+ /* turn on digital supply first */
+ ret = regulator_enable(mt9p031->reg_1v8);
+ if (ret) {
+ dev_err(&client->dev,
+ "Failed to enable 1.8v regulator: %d\n", ret);
+ goto err_1v8;
+ }
+ /* now turn on analog supply */
+ ret = regulator_enable(mt9p031->reg_2v8);
+ if (ret) {
+ dev_err(&client->dev,
+ "Failed to enable 2.8v regulator: %d\n", ret);
+ goto err_rst;
+ }
+ /* Now RESET_BAR must be high */
+ if (mt9p031->pdata->reset)
+ mt9p031->pdata->reset(&mt9p031->subdev, 0);
+
+ if (mt9p031->pdata->set_xclk)
+ mt9p031->pdata->set_xclk(&mt9p031->subdev, MT9P031_PIXCLK_FREQ);
+
+ /* soft reset */
+ ret = mt9p031_reset(client);
+ if (ret < 0) {
+ dev_err(&client->dev, "Failed to reset the camera\n");
+ goto err_rst;
+ }
+
+ ret = restore_registers(client);
+ if (ret < 0) {
+ dev_err(&client->dev, "Failed to restore registers\n");
+ goto err_rst;
+ }
+
+ return 0;
+err_rst:
+ regulator_disable(mt9p031->reg_1v8);
+err_1v8:
+ return ret;
+
+}
+
+static void mt9p031_power_off(struct mt9p031 *mt9p031)
+{
+ if (mt9p031->pdata->set_xclk)
+ mt9p031->pdata->set_xclk(&mt9p031->subdev, 0);
+ if (mt9p031->pdata->reset)
+ mt9p031->pdata->reset(&mt9p031->subdev, 1);
+ regulator_disable(mt9p031->reg_1v8);
+ regulator_disable(mt9p031->reg_2v8);
+}
+
+static int mt9p031_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ struct mt9p031 *mt9p031 = container_of(sd, struct mt9p031, subdev);
+
+ if (code->pad || code->index)
+ return -EINVAL;
+
+ code->code = mt9p031->format.code;
+
+ return 0;
+}
+
+static struct v4l2_mbus_framefmt *mt9p031_get_pad_format(
+ struct mt9p031 *mt9p031,
+ struct v4l2_subdev_fh *fh,
+ unsigned int pad, u32 which)
+{
+ switch (which) {
+ case V4L2_SUBDEV_FORMAT_TRY:
+ return v4l2_subdev_get_try_format(fh, pad);
+ case V4L2_SUBDEV_FORMAT_ACTIVE:
+ return &mt9p031->format;
+ default:
+ return NULL;
+ }
+}
+
+static struct v4l2_rect *mt9p031_get_pad_crop(struct mt9p031 *mt9p031,
+ struct v4l2_subdev_fh *fh, unsigned int pad, u32 which)
+{
+ switch (which) {
+ case V4L2_SUBDEV_FORMAT_TRY:
+ return v4l2_subdev_get_try_crop(fh, pad);
+ case V4L2_SUBDEV_FORMAT_ACTIVE:
+ return &mt9p031->rect;
+ default:
+ return NULL;
+ }
+}
+
+static int mt9p031_get_crop(struct v4l2_subdev *sd,
+ struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_crop *crop)
+{
+ struct mt9p031 *mt9p031 = container_of(sd, struct mt9p031, subdev);
+ struct v4l2_rect *rect = mt9p031_get_pad_crop(mt9p031, fh, crop->pad,
+ crop->which);
+ if (!rect)
+ return -EINVAL;
+
+ crop->rect = *rect;
+
+ return 0;
+}
+
+static u16 mt9p031_skip_for_crop(s32 source, s32 *target, s32 max_skip)
+{
+ unsigned int skip;
+
+ if (source - source / 4 < *target) {
+ *target = source;
+ return 1;
+ }
+
+ skip = DIV_ROUND_CLOSEST(source, *target);
+ if (skip > max_skip)
+ skip = max_skip;
+ *target = 2 * DIV_ROUND_UP(source, 2 * skip);
+
+ return skip;
+}
+
+static int mt9p031_set_params(struct i2c_client *client,
+ struct v4l2_rect *rect, u16 xskip, u16 yskip)
+{
+ struct mt9p031 *mt9p031 = to_mt9p031(client);
+ int ret;
+ u16 xbin, ybin;
+ const u16 hblank = MT9P031_H_BLANKING_VALUE,
+ vblank = MT9P031_V_BLANKING_VALUE;
+ __s32 left, top, width, height;
+
+ /*
+ * TODO: Attention! When implementing horizontal flipping, adjust
+ * alignment according to R2 "Column Start" description in the datasheet
+ */
+ if (xskip & 1) {
+ xbin = 1;
+ left = rect->left & (~3);
+ } else if (xskip & 2) {
+ xbin = 2;
+ left = rect->left & (~7);
+ } else {
+ xbin = 4;
+ left = rect->left & (~15);
+ }
+ top = rect->top & (~1);
+ width = rect->width;
+ height = rect->height;
+
+ ybin = min(yskip, (u16)4);
+
+ /* Disable register update, reconfigure atomically */
+ ret = mt9p031_set_output_control(mt9p031, 0,
+ MT9P031_OUTPUT_CONTROL_SYN);
+ if (ret < 0)
+ return ret;
+
+ dev_dbg(&client->dev, "skip %u:%u, rect %ux%u@%u:%u\n",
+ xskip, yskip, rect->width, rect->height, rect->left, rect->top);
+
+ /* Blanking and start values - default... */
+ ret = reg_write_cached(client, MT9P031_H_BLANKING, hblank,
+ &mt9p031->h_blanking);
+ if (ret < 0)
+ return ret;
+ ret = reg_write_cached(client, MT9P031_V_BLANKING, vblank,
+ &mt9p031->v_blanking);
+ if (ret < 0)
+ return ret;
+
+ ret = reg_write_cached(client, MT9P031_COLUMN_ADDRESS_MODE,
+ ((xbin - 1) << 4) | (xskip - 1),
+ &mt9p031->column_address_mode);
+ if (ret < 0)
+ return ret;
+ ret = reg_write_cached(client, MT9P031_ROW_ADDRESS_MODE,
+ ((ybin - 1) << 4) | (yskip - 1),
+ &mt9p031->row_address_mode);
+ if (ret < 0)
+ return ret;
+
+ dev_dbg(&client->dev, "new physical left %u, top %u\n",
+ rect->left, rect->top);
+
+ ret = reg_write_cached(client, MT9P031_COLUMN_START,
+ rect->left + MT9P031_COLUMN_START_DEF,
+ &mt9p031->column_start);
+ if (ret < 0)
+ return ret;
+ ret = reg_write_cached(client, MT9P031_ROW_START,
+ rect->top + MT9P031_ROW_START_DEF,
+ &mt9p031->row_start);
+ if (ret < 0)
+ return ret;
+ ret = reg_write_cached(client, MT9P031_WINDOW_WIDTH,
+ rect->width - 1,
+ &mt9p031->window_width);
+ if (ret < 0)
+ return ret;
+ ret = reg_write_cached(client, MT9P031_WINDOW_HEIGHT,
+ rect->height - 1,
+ &mt9p031->window_height);
+ if (ret < 0)
+ return ret;
+
+ /* Re-enable register update, commit all changes */
+ ret = mt9p031_set_output_control(mt9p031,
+ MT9P031_OUTPUT_CONTROL_SYN, 0);
+ if (ret < 0)
+ return ret;
+
+ mt9p031->xskip = xskip;
+ mt9p031->yskip = yskip;
+ return ret;
+}
+
+static int mt9p031_set_crop(struct v4l2_subdev *sd,
+ struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_crop *crop)
+{
+ struct mt9p031 *mt9p031 = container_of(sd, struct mt9p031, subdev);
+ struct v4l2_mbus_framefmt *f;
+ struct v4l2_rect *c;
+ struct v4l2_rect rect;
+ u16 xskip, yskip;
+ s32 width, height;
+
+ dev_dbg(mt9p031->subdev.v4l2_dev->dev, "%s(%ux%u@%u:%u : %u)\n",
+ __func__, crop->rect.width, crop->rect.height,
+ crop->rect.left, crop->rect.top, crop->which);
+
+ /*
+ * Clamp the crop rectangle boundaries and align them to a multiple of 2
+ * pixels.
+ */
+ rect.width = ALIGN(clamp(crop->rect.width,
+ MT9P031_WINDOW_WIDTH_MIN, MT9P031_WINDOW_WIDTH_MAX), 2);
+ rect.height = ALIGN(clamp(crop->rect.height,
+ MT9P031_WINDOW_HEIGHT_MIN, MT9P031_WINDOW_HEIGHT_MAX), 2);
+ rect.left = ALIGN(clamp(crop->rect.left,
+ 0, MT9P031_WINDOW_WIDTH_MAX - rect.width), 2);
+ rect.top = ALIGN(clamp(crop->rect.top,
+ 0, MT9P031_WINDOW_HEIGHT_MAX - rect.height), 2);
+
+ c = mt9p031_get_pad_crop(mt9p031, fh, crop->pad, crop->which);
+
+ if (rect.width != c->width || rect.height != c->height) {
+ /*
+ * Reset the output image size if the crop rectangle size has
+ * been modified.
+ */
+ f = mt9p031_get_pad_format(mt9p031, fh, crop->pad,
+ crop->which);
+ width = f->width;
+ height = f->height;
+
+ xskip = mt9p031_skip_for_crop(rect.width, &width, 7);
+ yskip = mt9p031_skip_for_crop(rect.height, &height, 8);
+ } else {
+ xskip = mt9p031->xskip;
+ yskip = mt9p031->yskip;
+ f = NULL;
+ }
+ if (f) {
+ f->width = width;
+ f->height = height;
+ }
+
+ *c = rect;
+ crop->rect = rect;
+
+ mt9p031->xskip = xskip;
+ mt9p031->yskip = yskip;
+ mt9p031->rect = *c;
+ return 0;
+}
+
+static int mt9p031_get_format(struct v4l2_subdev *sd,
+ struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_format *fmt)
+{
+ struct mt9p031 *mt9p031 = container_of(sd, struct mt9p031, subdev);
+
+ fmt->format =
+ *mt9p031_get_pad_format(mt9p031, fh, fmt->pad, fmt->which);
+ return 0;
+}
+
+static u16 mt9p031_skip_for_scale(s32 *source, s32 target,
+ s32 max_skip, s32 max)
+{
+ unsigned int skip;
+
+ if (*source - *source / 4 < target) {
+ *source = target;
+ return 1;
+ }
+
+ skip = min(max, *source + target / 2) / target;
+ if (skip > max_skip)
+ skip = max_skip;
+ *source = target * skip;
+
+ return skip;
+}
+
+static int mt9p031_fmt_validate(struct v4l2_subdev *sd,
+ struct v4l2_subdev_format *fmt)
+{
+ struct v4l2_mbus_framefmt *format = &fmt->format;
+
+ /* Hardcode code and colorspace as sensor only supports one */
+ format->code = V4L2_MBUS_FMT_SGRBG12_1X12;
+ format->colorspace = V4L2_COLORSPACE_SRGB;
+
+ format->width = clamp_t(int, ALIGN(format->width, 2), 2,
+ MT9P031_WINDOW_WIDTH_MAX);
+ format->height = clamp_t(int, ALIGN(format->height, 2), 2,
+ MT9P031_WINDOW_HEIGHT_MAX);
+ format->field = V4L2_FIELD_NONE;
+
+ return 0;
+}
+
+static int mt9p031_set_format(struct v4l2_subdev *sd,
+ struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_format *format)
+{
+ struct v4l2_subdev_format sdf = *format;
+ struct v4l2_mbus_framefmt *__format, *format_bak = &sdf.format;
+ struct v4l2_rect *__crop, rect;
+ struct mt9p031 *mt9p031 = container_of(sd, struct mt9p031, subdev);
+ u16 xskip, yskip;
+ int ret;
+
+ __crop = mt9p031_get_pad_crop(mt9p031, fh, format->pad, format->which);
+
+ ret = mt9p031_fmt_validate(sd, &sdf);
+ if (ret < 0)
+ return ret;
+ rect.width = __crop->width;
+ rect.height = __crop->height;
+
+ xskip = mt9p031_skip_for_scale(&rect.width, format_bak->width, 7,
+ MT9P031_WINDOW_WIDTH_MAX);
+ if (rect.width + __crop->left > MT9P031_WINDOW_WIDTH_MAX)
+ rect.left = (MT9P031_WINDOW_WIDTH_MAX - rect.width) / 2;
+ else
+ rect.left = __crop->left;
+ yskip = mt9p031_skip_for_scale(&rect.height, format_bak->height, 8,
+ MT9P031_WINDOW_HEIGHT_MAX);
+ if (rect.height + __crop->top > MT9P031_WINDOW_HEIGHT_MAX)
+ rect.top = (MT9P031_WINDOW_HEIGHT_MAX - rect.height) / 2;
+ else
+ rect.top = __crop->top;
+
+ dev_dbg(mt9p031->subdev.v4l2_dev->dev, "%s(%ux%u : %u)\n", __func__,
+ format_bak->width, format_bak->height, format->which);
+ if (__crop)
+ *__crop = rect;
+
+ __format = mt9p031_get_pad_format(mt9p031, fh, format->pad, format->which);
+ *__format = *format_bak;
+ format->format = *format_bak;
+
+ mt9p031->xskip = xskip;
+ mt9p031->yskip = yskip;
+ mt9p031->rect = *__crop;
+ return 0;
+}
+
+static int mt9p031_s_stream(struct v4l2_subdev *sd, int enable)
+{
+ struct mt9p031 *mt9p031 = container_of(sd, struct mt9p031, subdev);
+ struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
+ struct v4l2_rect rect = mt9p031->rect;
+ u16 xskip = mt9p031->xskip;
+ u16 yskip = mt9p031->yskip;
+ int ret;
+
+ if (enable) {
+ ret = mt9p031_set_params(client, &rect, xskip, yskip);
+ if (ret < 0)
+ return ret;
+ /* Switch to master "normal" mode */
+ ret = mt9p031_set_output_control(mt9p031, 0,
+ MT9P031_OUTPUT_CONTROL_CEN);
+ } else {
+ /* Stop sensor readout */
+ ret = mt9p031_set_output_control(mt9p031,
+ MT9P031_OUTPUT_CONTROL_CEN, 0);
+ }
+ return ret;
+}
+
+static int mt9p031_video_probe(struct i2c_client *client)
+{
+ s32 data;
+
+ /* Read out the chip version register */
+ data = reg_read(client, MT9P031_CHIP_VERSION);
+ if (data != MT9P031_CHIP_VERSION_VALUE) {
+ dev_err(&client->dev,
+ "No MT9P031 chip detected, register read %x\n", data);
+ return -ENODEV;
+ }
+
+ dev_info(&client->dev, "Detected a MT9P031 chip ID %x\n", data);
+
+ return 0;
+}
+
+static int mt9p031_set_power(struct v4l2_subdev *sd, int on)
+{
+ struct mt9p031 *mt9p031 = container_of(sd, struct mt9p031, subdev);
+ int ret = 0;
+
+ mutex_lock(&mt9p031->power_lock);
+
+ /*
+ * If the power count is modified from 0 to != 0 or from != 0 to 0,
+ * update the power state.
+ */
+ if (mt9p031->power_count == !on) {
+ if (on) {
+ ret = mt9p031_power_on(mt9p031);
+ if (ret) {
+ dev_err(mt9p031->subdev.v4l2_dev->dev,
+ "Failed to enable 2.8v regulator: %d\n", ret);
+ goto out;
+ }
+ } else {
+ mt9p031_power_off(mt9p031);
+ }
+ }
+
+ /* Update the power count. */
+ mt9p031->power_count += on ? 1 : -1;
+ WARN_ON(mt9p031->power_count < 0);
+
+out:
+ mutex_unlock(&mt9p031->power_lock);
+ return ret;
+}
+
+static int mt9p031_registered(struct v4l2_subdev *sd)
+{
+ struct mt9p031 *mt9p031 = container_of(sd, struct mt9p031, subdev);
+ struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
+ int ret;
+
+ ret = mt9p031_set_power(&mt9p031->subdev, 1);
+ if (ret) {
+ dev_err(&client->dev,
+ "Failed to power on device: %d\n", ret);
+ goto err_pwron;
+ }
+
+ ret = mt9p031_video_probe(client);
+ if (ret)
+ goto err_evprobe;
+
+ mt9p031->pad.flags = MEDIA_PAD_FL_SOURCE;
+ ret = media_entity_init(&mt9p031->subdev.entity, 1, &mt9p031->pad, 0);
+ if (ret)
+ goto err_evprobe;
+
+ mt9p031->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+ mt9p031_set_power(&mt9p031->subdev, 0);
+
+ return 0;
+err_evprobe:
+ mt9p031_set_power(&mt9p031->subdev, 0);
+err_pwron:
+ return ret;
+}
+
+static int mt9p031_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+ struct mt9p031 *mt9p031;
+ mt9p031 = container_of(sd, struct mt9p031, subdev);
+
+ mt9p031->rect.width = MT9P031_WINDOW_WIDTH_MAX;
+ mt9p031->rect.height = MT9P031_WINDOW_HEIGHT_MAX;
+ mt9p031->rect.left = MT9P031_COLUMN_START_DEF;
+ mt9p031->rect.top = MT9P031_ROW_START_DEF;
+
+ mt9p031->format.code = V4L2_MBUS_FMT_SGRBG12_1X12;
+ mt9p031->format.width = MT9P031_WINDOW_WIDTH_MAX;
+ mt9p031->format.height = MT9P031_WINDOW_HEIGHT_MAX;
+ mt9p031->format.field = V4L2_FIELD_NONE;
+ mt9p031->format.colorspace = V4L2_COLORSPACE_SRGB;
+
+ mt9p031->xskip = 1;
+ mt9p031->yskip = 1;
+ return mt9p031_set_power(sd, 1);
+}
+
+static int mt9p031_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+ return mt9p031_set_power(sd, 0);
+}
+
+static struct v4l2_subdev_core_ops mt9p031_subdev_core_ops = {
+ .s_power = mt9p031_set_power,
+};
+
+static struct v4l2_subdev_video_ops mt9p031_subdev_video_ops = {
+ .s_stream = mt9p031_s_stream,
+};
+
+static struct v4l2_subdev_pad_ops mt9p031_subdev_pad_ops = {
+ .enum_mbus_code = mt9p031_enum_mbus_code,
+ .get_fmt = mt9p031_get_format,
+ .set_fmt = mt9p031_set_format,
+ .get_crop = mt9p031_get_crop,
+ .set_crop = mt9p031_set_crop,
+};
+
+static struct v4l2_subdev_ops mt9p031_subdev_ops = {
+ .core = &mt9p031_subdev_core_ops,
+ .video = &mt9p031_subdev_video_ops,
+ .pad = &mt9p031_subdev_pad_ops,
+};
+
+static const struct v4l2_subdev_internal_ops mt9p031_subdev_internal_ops = {
+ .registered = mt9p031_registered,
+ .open = mt9p031_open,
+ .close = mt9p031_close,
+};
+
+static int mt9p031_probe(struct i2c_client *client,
+ const struct i2c_device_id *did)
+{
+ struct mt9p031 *mt9p031;
+ struct mt9p031_platform_data *pdata = client->dev.platform_data;
+ struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
+ int ret;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
+ dev_warn(&adapter->dev,
+ "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
+ return -EIO;
+ }
+
+ mt9p031 = kzalloc(sizeof(struct mt9p031), GFP_KERNEL);
+ if (!mt9p031)
+ return -ENOMEM;
+
+ mutex_init(&mt9p031->power_lock);
+ v4l2_i2c_subdev_init(&mt9p031->subdev, client, &mt9p031_subdev_ops);
+ mt9p031->subdev.internal_ops = &mt9p031_subdev_internal_ops;
+
+ mt9p031->pdata = pdata;
+
+ mt9p031->reg_1v8 = regulator_get(NULL, "cam_1v8");
+ if (IS_ERR(mt9p031->reg_1v8)) {
+ ret = PTR_ERR(mt9p031->reg_1v8);
+ dev_err(mt9p031->subdev.v4l2_dev->dev,
+ "Failed 1.8v regulator: %d\n", ret);
+ goto err_e1v8;
+ }
+
+ mt9p031->reg_2v8 = regulator_get(NULL, "cam_2v8");
+ if (IS_ERR(mt9p031->reg_2v8)) {
+ ret = PTR_ERR(mt9p031->reg_2v8);
+ dev_err(mt9p031->subdev.v4l2_dev->dev,
+ "Failed 2.8v regulator: %d\n", ret);
+ goto err_e2v8;
+ }
+ return 0;
+err_e2v8:
+ regulator_put(mt9p031->reg_1v8);
+err_e1v8:
+ kfree(mt9p031);
+ return ret;
+}
+
+static int mt9p031_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct mt9p031 *mt9p031 = container_of(sd, struct mt9p031, subdev);
+
+ v4l2_device_unregister_subdev(sd);
+ media_entity_cleanup(&sd->entity);
+ regulator_put(mt9p031->reg_2v8);
+ regulator_put(mt9p031->reg_1v8);
+ kfree(mt9p031);
+
+ return 0;
+}
+
+static const struct i2c_device_id mt9p031_id[] = {
+ { "mt9p031", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, mt9p031_id);
+
+static struct i2c_driver mt9p031_i2c_driver = {
+ .driver = {
+ .name = "mt9p031",
+ },
+ .probe = mt9p031_probe,
+ .remove = mt9p031_remove,
+ .id_table = mt9p031_id,
+};
+
+static int __init mt9p031_mod_init(void)
+{
+ return i2c_add_driver(&mt9p031_i2c_driver);
+}
+
+static void __exit mt9p031_mod_exit(void)
+{
+ i2c_del_driver(&mt9p031_i2c_driver);
+}
+
+module_init(mt9p031_mod_init);
+module_exit(mt9p031_mod_exit);
+
+MODULE_DESCRIPTION("Aptina MT9P031 Camera driver");
+MODULE_AUTHOR("Bastian Hecht <hechtb@gmail.com>");
+MODULE_LICENSE("GPL v2");
new file mode 100644
@@ -0,0 +1,11 @@
+#ifndef MT9P031_H
+#define MT9P031_H
+
+struct v4l2_subdev;
+
+struct mt9p031_platform_data {
+ int (*set_xclk)(struct v4l2_subdev *subdev, int hz);
+ int (*reset)(struct v4l2_subdev *subdev, int active);
+};
+
+#endif
This RFC includes a power management implementation that causes the sensor to show images with horizontal artifacts (usually monochrome lines that appear on the image randomly). Signed-off-by: Javier Martin <javier.martin@vista-silicon.com> --- drivers/media/video/Kconfig | 7 + drivers/media/video/Makefile | 1 + drivers/media/video/mt9p031.c | 841 +++++++++++++++++++++++++++++++++++++++++ include/media/mt9p031.h | 11 + 4 files changed, 860 insertions(+), 0 deletions(-) create mode 100644 drivers/media/video/mt9p031.c create mode 100644 include/media/mt9p031.h