--- /dev/null
+/*
+ * Driver for MT9P031 CMOS Image Sensor from Aptina
+ *
+ * Copyright (C) 2011, Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ * 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/clk.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/log2.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_graph.h>
+#include <linux/pm.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/videodev2.h>
+
+#include <media/mt9p031.h>
+#include <media/v4l2-async.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-subdev.h>
+
+#include "aptina-pll.h"
+
+#define MT9P031_PIXEL_ARRAY_WIDTH 2752
+#define MT9P031_PIXEL_ARRAY_HEIGHT 2004
+
+#define MT9P031_CHIP_VERSION 0x00
+#define MT9P031_CHIP_VERSION_VALUE 0x1801
+#define MT9P031_ROW_START 0x01
+#define MT9P031_ROW_START_MIN 0
+#define MT9P031_ROW_START_MAX 2004
+#define MT9P031_ROW_START_DEF 54
+#define MT9P031_COLUMN_START 0x02
+#define MT9P031_COLUMN_START_MIN 0
+#define MT9P031_COLUMN_START_MAX 2750
+#define MT9P031_COLUMN_START_DEF 16
+#define MT9P031_WINDOW_HEIGHT 0x03
+#define MT9P031_WINDOW_HEIGHT_MIN 2
+#define MT9P031_WINDOW_HEIGHT_MAX 2006
+#define MT9P031_WINDOW_HEIGHT_DEF 1944
+#define MT9P031_WINDOW_WIDTH 0x04
+#define MT9P031_WINDOW_WIDTH_MIN 2
+#define MT9P031_WINDOW_WIDTH_MAX 2752
+#define MT9P031_WINDOW_WIDTH_DEF 2592
+#define MT9P031_HORIZONTAL_BLANK 0x05
+#define MT9P031_HORIZONTAL_BLANK_MIN 0
+#define MT9P031_HORIZONTAL_BLANK_MAX 4095
+#define MT9P031_VERTICAL_BLANK 0x06
+#define MT9P031_VERTICAL_BLANK_MIN 1
+#define MT9P031_VERTICAL_BLANK_MAX 4096
+#define MT9P031_VERTICAL_BLANK_DEF 26
+#define MT9P031_OUTPUT_CONTROL 0x07
+#define MT9P031_OUTPUT_CONTROL_CEN 2
+#define MT9P031_OUTPUT_CONTROL_SYN 1
+#define MT9P031_OUTPUT_CONTROL_DEF 0x1f82
+#define MT9P031_SHUTTER_WIDTH_UPPER 0x08
+#define MT9P031_SHUTTER_WIDTH_LOWER 0x09
+#define MT9P031_SHUTTER_WIDTH_MIN 1
+#define MT9P031_SHUTTER_WIDTH_MAX 1048575
+#define MT9P031_SHUTTER_WIDTH_DEF 1943
+#define MT9P031_PLL_CONTROL 0x10
+#define MT9P031_PLL_CONTROL_PWROFF 0x0050
+#define MT9P031_PLL_CONTROL_PWRON 0x0051
+#define MT9P031_PLL_CONTROL_USEPLL 0x0052
+#define MT9P031_PLL_CONFIG_1 0x11
+#define MT9P031_PLL_CONFIG_2 0x12
+#define MT9P031_PIXEL_CLOCK_CONTROL 0x0a
+#define MT9P031_PIXEL_CLOCK_INVERT (1 << 15)
+#define MT9P031_PIXEL_CLOCK_SHIFT(n) ((n) << 8)
+#define MT9P031_PIXEL_CLOCK_DIVIDE(n) ((n) << 0)
+#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 (1 << 15)
+#define MT9P031_READ_MODE_2_COL_MIR (1 << 14)
+#define MT9P031_READ_MODE_2_ROW_BLC (1 << 6)
+#define MT9P031_ROW_ADDRESS_MODE 0x22
+#define MT9P031_COLUMN_ADDRESS_MODE 0x23
+#define MT9P031_GLOBAL_GAIN 0x35
+#define MT9P031_GLOBAL_GAIN_MIN 8
+#define MT9P031_GLOBAL_GAIN_MAX 1024
+#define MT9P031_GLOBAL_GAIN_DEF 8
+#define MT9P031_GLOBAL_GAIN_MULT (1 << 6)
+#define MT9P031_ROW_BLACK_TARGET 0x49
+#define MT9P031_ROW_BLACK_DEF_OFFSET 0x4b
+#define MT9P031_GREEN1_OFFSET 0x60
+#define MT9P031_GREEN2_OFFSET 0x61
+#define MT9P031_BLACK_LEVEL_CALIBRATION 0x62
+#define MT9P031_BLC_MANUAL_BLC (1 << 0)
+#define MT9P031_RED_OFFSET 0x63
+#define MT9P031_BLUE_OFFSET 0x64
+#define MT9P031_TEST_PATTERN 0xa0
+#define MT9P031_TEST_PATTERN_SHIFT 3
+#define MT9P031_TEST_PATTERN_ENABLE (1 << 0)
+#define MT9P031_TEST_PATTERN_DISABLE (0 << 0)
+#define MT9P031_TEST_PATTERN_GREEN 0xa1
+#define MT9P031_TEST_PATTERN_RED 0xa2
+#define MT9P031_TEST_PATTERN_BLUE 0xa3
+
+enum mt9p031_model {
+ MT9P031_MODEL_COLOR,
+ MT9P031_MODEL_MONOCHROME,
+};
+
+struct mt9p031 {
+ struct v4l2_subdev subdev;
+ struct media_pad pad;
+ struct v4l2_rect crop; /* Sensor window */
+ struct v4l2_mbus_framefmt format;
+ struct mt9p031_platform_data *pdata;
+ struct mutex power_lock; /* lock to protect power_count */
+ int power_count;
+
+ struct clk *clk;
+ struct regulator_bulk_data regulators[3];
+
+ enum mt9p031_model model;
+ struct aptina_pll pll;
+ unsigned int clk_div;
+ bool use_pll;
+ struct gpio_desc *reset;
+
+ struct v4l2_ctrl_handler ctrls;
+ struct v4l2_ctrl *blc_auto;
+ struct v4l2_ctrl *blc_offset;
+
+ /* Registers cache */
+ u16 output_control;
+ u16 mode2;
+};
+
+static struct mt9p031 *to_mt9p031(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct mt9p031, subdev);
+}
+
+static int mt9p031_read(struct i2c_client *client, u8 reg)
+{
+ return i2c_smbus_read_word_swapped(client, reg);
+}
+
+static int mt9p031_write(struct i2c_client *client, u8 reg, u16 data)
+{
+ return i2c_smbus_write_word_swapped(client, reg, data);
+}
+
+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;
+ int ret;
+
+ ret = mt9p031_write(client, MT9P031_OUTPUT_CONTROL, value);
+ if (ret < 0)
+ return ret;
+
+ mt9p031->output_control = value;
+ return 0;
+}
+
+static int mt9p031_set_mode2(struct mt9p031 *mt9p031, u16 clear, u16 set)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
+ u16 value = (mt9p031->mode2 & ~clear) | set;
+ int ret;
+
+ ret = mt9p031_write(client, MT9P031_READ_MODE_2, value);
+ if (ret < 0)
+ return ret;
+
+ mt9p031->mode2 = value;
+ return 0;
+}
+
+static int mt9p031_reset(struct mt9p031 *mt9p031)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
+ int ret;
+
+ /* Disable chip output, synchronous option update */
+ ret = mt9p031_write(client, MT9P031_RST, MT9P031_RST_ENABLE);
+ if (ret < 0)
+ return ret;
+ ret = mt9p031_write(client, MT9P031_RST, MT9P031_RST_DISABLE);
+ if (ret < 0)
+ return ret;
+
+ ret = mt9p031_write(client, MT9P031_PIXEL_CLOCK_CONTROL,
+ MT9P031_PIXEL_CLOCK_DIVIDE(mt9p031->clk_div));
+ if (ret < 0)
+ return ret;
+
+ return mt9p031_set_output_control(mt9p031, MT9P031_OUTPUT_CONTROL_CEN,
+ 0);
+}
+
+static int mt9p031_clk_setup(struct mt9p031 *mt9p031)
+{
+ static const struct aptina_pll_limits limits = {
+ .ext_clock_min = 6000000,
+ .ext_clock_max = 27000000,
+ .int_clock_min = 2000000,
+ .int_clock_max = 13500000,
+ .out_clock_min = 180000000,
+ .out_clock_max = 360000000,
+ .pix_clock_max = 96000000,
+ .n_min = 1,
+ .n_max = 64,
+ .m_min = 16,
+ .m_max = 255,
+ .p1_min = 1,
+ .p1_max = 128,
+ };
+
+ struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
+ struct mt9p031_platform_data *pdata = mt9p031->pdata;
+ int ret;
+
+ mt9p031->clk = devm_clk_get(&client->dev, NULL);
+ if (IS_ERR(mt9p031->clk))
+ return PTR_ERR(mt9p031->clk);
+
+ ret = clk_set_rate(mt9p031->clk, pdata->ext_freq);
+ if (ret < 0)
+ return ret;
+
+ /* If the external clock frequency is out of bounds for the PLL use the
+ * pixel clock divider only and disable the PLL.
+ */
+ if (pdata->ext_freq > limits.ext_clock_max) {
+ unsigned int div;
+
+ div = DIV_ROUND_UP(pdata->ext_freq, pdata->target_freq);
+ div = roundup_pow_of_two(div) / 2;
+
+ mt9p031->clk_div = min_t(unsigned int, div, 64);
+ mt9p031->use_pll = false;
+
+ return 0;
+ }
+
+ mt9p031->pll.ext_clock = pdata->ext_freq;
+ mt9p031->pll.pix_clock = pdata->target_freq;
+ mt9p031->use_pll = true;
+
+ return aptina_pll_calculate(&client->dev, &limits, &mt9p031->pll);
+}
+
+static int mt9p031_pll_enable(struct mt9p031 *mt9p031)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
+ int ret;
+
+ if (!mt9p031->use_pll)
+ return 0;
+
+ ret = mt9p031_write(client, MT9P031_PLL_CONTROL,
+ MT9P031_PLL_CONTROL_PWRON);
+ if (ret < 0)
+ return ret;
+
+ ret = mt9p031_write(client, MT9P031_PLL_CONFIG_1,
+ (mt9p031->pll.m << 8) | (mt9p031->pll.n - 1));
+ if (ret < 0)
+ return ret;
+
+ ret = mt9p031_write(client, MT9P031_PLL_CONFIG_2, mt9p031->pll.p1 - 1);
+ if (ret < 0)
+ return ret;
+
+ usleep_range(1000, 2000);
+ ret = mt9p031_write(client, MT9P031_PLL_CONTROL,
+ MT9P031_PLL_CONTROL_PWRON |
+ MT9P031_PLL_CONTROL_USEPLL);
+ return ret;
+}
+
+static inline int mt9p031_pll_disable(struct mt9p031 *mt9p031)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
+
+ if (!mt9p031->use_pll)
+ return 0;
+
+ return mt9p031_write(client, MT9P031_PLL_CONTROL,
+ MT9P031_PLL_CONTROL_PWROFF);
+}
+
+static int mt9p031_power_on(struct mt9p031 *mt9p031)
+{
+ int ret;
+
+ /* Ensure RESET_BAR is active */
+ if (mt9p031->reset) {
+ gpiod_set_value(mt9p031->reset, 1);
+ usleep_range(1000, 2000);
+ }
+
+ /* Bring up the supplies */
+ ret = regulator_bulk_enable(ARRAY_SIZE(mt9p031->regulators),
+ mt9p031->regulators);
+ if (ret < 0)
+ return ret;
+
+ /* Enable clock */
+ if (mt9p031->clk) {
+ ret = clk_prepare_enable(mt9p031->clk);
+ if (ret) {
+ regulator_bulk_disable(ARRAY_SIZE(mt9p031->regulators),
+ mt9p031->regulators);
+ return ret;
+ }
+ }
+
+ /* Now RESET_BAR must be high */
+ if (mt9p031->reset) {
+ gpiod_set_value(mt9p031->reset, 0);
+ usleep_range(1000, 2000);
+ }
+
+ return 0;
+}
+
+static void mt9p031_power_off(struct mt9p031 *mt9p031)
+{
+ if (mt9p031->reset) {
+ gpiod_set_value(mt9p031->reset, 1);
+ usleep_range(1000, 2000);
+ }
+
+ regulator_bulk_disable(ARRAY_SIZE(mt9p031->regulators),
+ mt9p031->regulators);
+
+ if (mt9p031->clk)
+ clk_disable_unprepare(mt9p031->clk);
+}
+
+static int __mt9p031_set_power(struct mt9p031 *mt9p031, bool on)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
+ int ret;
+
+ if (!on) {
+ mt9p031_power_off(mt9p031);
+ return 0;
+ }
+
+ ret = mt9p031_power_on(mt9p031);
+ if (ret < 0)
+ return ret;
+
+ ret = mt9p031_reset(mt9p031);
+ if (ret < 0) {
+ dev_err(&client->dev, "Failed to reset the camera\n");
+ return ret;
+ }
+
+ return v4l2_ctrl_handler_setup(&mt9p031->ctrls);
+}
+
+/* -----------------------------------------------------------------------------
+ * V4L2 subdev video operations
+ */
+
+static int mt9p031_set_params(struct mt9p031 *mt9p031)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
+ struct v4l2_mbus_framefmt *format = &mt9p031->format;
+ const struct v4l2_rect *crop = &mt9p031->crop;
+ unsigned int hblank;
+ unsigned int vblank;
+ unsigned int xskip;
+ unsigned int yskip;
+ unsigned int xbin;
+ unsigned int ybin;
+ int ret;
+
+ /* Windows position and size.
+ *
+ * TODO: Make sure the start coordinates and window size match the
+ * skipping, binning and mirroring (see description of registers 2 and 4
+ * in table 13, and Binning section on page 41).
+ */
+ ret = mt9p031_write(client, MT9P031_COLUMN_START, crop->left);
+ if (ret < 0)
+ return ret;
+ ret = mt9p031_write(client, MT9P031_ROW_START, crop->top);
+ if (ret < 0)
+ return ret;
+ ret = mt9p031_write(client, MT9P031_WINDOW_WIDTH, crop->width - 1);
+ if (ret < 0)
+ return ret;
+ ret = mt9p031_write(client, MT9P031_WINDOW_HEIGHT, crop->height - 1);
+ if (ret < 0)
+ return ret;
+
+ /* Row and column binning and skipping. Use the maximum binning value
+ * compatible with the skipping settings.
+ */
+ xskip = DIV_ROUND_CLOSEST(crop->width, format->width);
+ yskip = DIV_ROUND_CLOSEST(crop->height, format->height);
+ xbin = 1 << (ffs(xskip) - 1);
+ ybin = 1 << (ffs(yskip) - 1);
+
+ ret = mt9p031_write(client, MT9P031_COLUMN_ADDRESS_MODE,
+ ((xbin - 1) << 4) | (xskip - 1));
+ if (ret < 0)
+ return ret;
+ ret = mt9p031_write(client, MT9P031_ROW_ADDRESS_MODE,
+ ((ybin - 1) << 4) | (yskip - 1));
+ if (ret < 0)
+ return ret;
+
+ /* Blanking - use minimum value for horizontal blanking and default
+ * value for vertical blanking.
+ */
+ hblank = 346 * ybin + 64 + (80 >> min_t(unsigned int, xbin, 3));
+ vblank = MT9P031_VERTICAL_BLANK_DEF;
+
+ ret = mt9p031_write(client, MT9P031_HORIZONTAL_BLANK, hblank - 1);
+ if (ret < 0)
+ return ret;
+ ret = mt9p031_write(client, MT9P031_VERTICAL_BLANK, vblank - 1);
+ if (ret < 0)
+ return ret;
+
+ return ret;
+}
+
+static int mt9p031_s_stream(struct v4l2_subdev *subdev, int enable)
+{
+ struct mt9p031 *mt9p031 = to_mt9p031(subdev);
+ int ret;
+
+ if (!enable) {
+ /* Stop sensor readout */
+ ret = mt9p031_set_output_control(mt9p031,
+ MT9P031_OUTPUT_CONTROL_CEN, 0);
+ if (ret < 0)
+ return ret;
+
+ return mt9p031_pll_disable(mt9p031);
+ }
+
+ ret = mt9p031_set_params(mt9p031);
+ if (ret < 0)
+ return ret;
+
+ /* Switch to master "normal" mode */
+ ret = mt9p031_set_output_control(mt9p031, 0,
+ MT9P031_OUTPUT_CONTROL_CEN);
+ if (ret < 0)
+ return ret;
+
+ return mt9p031_pll_enable(mt9p031);
+}
+
+static int mt9p031_enum_mbus_code(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ struct mt9p031 *mt9p031 = to_mt9p031(subdev);
+
+ if (code->pad || code->index)
+ return -EINVAL;
+
+ code->code = mt9p031->format.code;
+ return 0;
+}
+
+static int mt9p031_enum_frame_size(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_frame_size_enum *fse)
+{
+ struct mt9p031 *mt9p031 = to_mt9p031(subdev);
+
+ if (fse->index >= 8 || fse->code != mt9p031->format.code)
+ return -EINVAL;
+
+ fse->min_width = MT9P031_WINDOW_WIDTH_DEF
+ / min_t(unsigned int, 7, fse->index + 1);
+ fse->max_width = fse->min_width;
+ fse->min_height = MT9P031_WINDOW_HEIGHT_DEF / (fse->index + 1);
+ fse->max_height = fse->min_height;
+
+ return 0;
+}
+
+static struct v4l2_mbus_framefmt *
+__mt9p031_get_pad_format(struct mt9p031 *mt9p031, struct v4l2_subdev_pad_config *cfg,
+ unsigned int pad, u32 which)
+{
+ switch (which) {
+ case V4L2_SUBDEV_FORMAT_TRY:
+ return v4l2_subdev_get_try_format(&mt9p031->subdev, cfg, 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_pad_config *cfg,
+ unsigned int pad, u32 which)
+{
+ switch (which) {
+ case V4L2_SUBDEV_FORMAT_TRY:
+ return v4l2_subdev_get_try_crop(&mt9p031->subdev, cfg, pad);
+ case V4L2_SUBDEV_FORMAT_ACTIVE:
+ return &mt9p031->crop;
+ default:
+ return NULL;
+ }
+}
+
+static int mt9p031_get_format(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct mt9p031 *mt9p031 = to_mt9p031(subdev);
+
+ fmt->format = *__mt9p031_get_pad_format(mt9p031, cfg, fmt->pad,
+ fmt->which);
+ return 0;
+}
+
+static int mt9p031_set_format(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *format)
+{
+ struct mt9p031 *mt9p031 = to_mt9p031(subdev);
+ struct v4l2_mbus_framefmt *__format;
+ struct v4l2_rect *__crop;
+ unsigned int width;
+ unsigned int height;
+ unsigned int hratio;
+ unsigned int vratio;
+
+ __crop = __mt9p031_get_pad_crop(mt9p031, cfg, 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_t(unsigned int, __crop->width / 7,
+ MT9P031_WINDOW_WIDTH_MIN),
+ __crop->width);
+ height = clamp_t(unsigned int, ALIGN(format->format.height, 2),
+ max_t(unsigned int, __crop->height / 8,
+ MT9P031_WINDOW_HEIGHT_MIN),
+ __crop->height);
+
+ hratio = DIV_ROUND_CLOSEST(__crop->width, width);
+ vratio = DIV_ROUND_CLOSEST(__crop->height, height);
+
+ __format = __mt9p031_get_pad_format(mt9p031, cfg, format->pad,
+ format->which);
+ __format->width = __crop->width / hratio;
+ __format->height = __crop->height / vratio;
+
+ format->format = *__format;
+
+ return 0;
+}
+
+static int mt9p031_get_selection(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_selection *sel)
+{
+ struct mt9p031 *mt9p031 = to_mt9p031(subdev);
+
+ if (sel->target != V4L2_SEL_TGT_CROP)
+ return -EINVAL;
+
+ sel->r = *__mt9p031_get_pad_crop(mt9p031, cfg, sel->pad, sel->which);
+ return 0;
+}
+
+static int mt9p031_set_selection(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_selection *sel)
+{
+ struct mt9p031 *mt9p031 = to_mt9p031(subdev);
+ struct v4l2_mbus_framefmt *__format;
+ struct v4l2_rect *__crop;
+ struct v4l2_rect rect;
+
+ if (sel->target != V4L2_SEL_TGT_CROP)
+ return -EINVAL;
+
+ /* Clamp the crop rectangle boundaries and align them to a multiple of 2
+ * pixels to ensure a GRBG Bayer pattern.
+ */
+ rect.left = clamp(ALIGN(sel->r.left, 2), MT9P031_COLUMN_START_MIN,
+ MT9P031_COLUMN_START_MAX);
+ rect.top = clamp(ALIGN(sel->r.top, 2), MT9P031_ROW_START_MIN,
+ MT9P031_ROW_START_MAX);
+ rect.width = clamp_t(unsigned int, ALIGN(sel->r.width, 2),
+ MT9P031_WINDOW_WIDTH_MIN,
+ MT9P031_WINDOW_WIDTH_MAX);
+ rect.height = clamp_t(unsigned int, ALIGN(sel->r.height, 2),
+ MT9P031_WINDOW_HEIGHT_MIN,
+ MT9P031_WINDOW_HEIGHT_MAX);
+
+ rect.width = min_t(unsigned int, rect.width,
+ MT9P031_PIXEL_ARRAY_WIDTH - rect.left);
+ rect.height = min_t(unsigned int, rect.height,
+ MT9P031_PIXEL_ARRAY_HEIGHT - rect.top);
+
+ __crop = __mt9p031_get_pad_crop(mt9p031, cfg, sel->pad, sel->which);
+
+ if (rect.width != __crop->width || rect.height != __crop->height) {
+ /* Reset the output image size if the crop rectangle size has
+ * been modified.
+ */
+ __format = __mt9p031_get_pad_format(mt9p031, cfg, sel->pad,
+ sel->which);
+ __format->width = rect.width;
+ __format->height = rect.height;
+ }
+
+ *__crop = rect;
+ sel->r = rect;
+
+ return 0;
+}
+
+/* -----------------------------------------------------------------------------
+ * V4L2 subdev control operations
+ */
+
+#define V4L2_CID_BLC_AUTO (V4L2_CID_USER_BASE | 0x1002)
+#define V4L2_CID_BLC_TARGET_LEVEL (V4L2_CID_USER_BASE | 0x1003)
+#define V4L2_CID_BLC_ANALOG_OFFSET (V4L2_CID_USER_BASE | 0x1004)
+#define V4L2_CID_BLC_DIGITAL_OFFSET (V4L2_CID_USER_BASE | 0x1005)
+
+static int mt9p031_restore_blc(struct mt9p031 *mt9p031)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
+ int ret;
+
+ if (mt9p031->blc_auto->cur.val != 0) {
+ ret = mt9p031_set_mode2(mt9p031, 0,
+ MT9P031_READ_MODE_2_ROW_BLC);
+ if (ret < 0)
+ return ret;
+ }
+
+ if (mt9p031->blc_offset->cur.val != 0) {
+ ret = mt9p031_write(client, MT9P031_ROW_BLACK_TARGET,
+ mt9p031->blc_offset->cur.val);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int mt9p031_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct mt9p031 *mt9p031 =
+ container_of(ctrl->handler, struct mt9p031, ctrls);
+ struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
+ u16 data;
+ int ret;
+
+ if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
+ return 0;
+
+ switch (ctrl->id) {
+ case V4L2_CID_EXPOSURE:
+ ret = mt9p031_write(client, MT9P031_SHUTTER_WIDTH_UPPER,
+ (ctrl->val >> 16) & 0xffff);
+ if (ret < 0)
+ return ret;
+
+ return mt9p031_write(client, MT9P031_SHUTTER_WIDTH_LOWER,
+ ctrl->val & 0xffff);
+
+ case V4L2_CID_GAIN:
+ /* Gain is controlled by 2 analog stages and a digital stage.
+ * Valid values for the 3 stages are
+ *
+ * Stage Min Max Step
+ * ------------------------------------------
+ * First analog stage x1 x2 1
+ * Second analog stage x1 x4 0.125
+ * Digital stage x1 x16 0.125
+ *
+ * To minimize noise, the gain stages should be used in the
+ * second analog stage, first analog stage, digital stage order.
+ * Gain from a previous stage should be pushed to its maximum
+ * value before the next stage is used.
+ */
+ if (ctrl->val <= 32) {
+ data = ctrl->val;
+ } else if (ctrl->val <= 64) {
+ ctrl->val &= ~1;
+ data = (1 << 6) | (ctrl->val >> 1);
+ } else {
+ ctrl->val &= ~7;
+ data = ((ctrl->val - 64) << 5) | (1 << 6) | 32;
+ }
+
+ return mt9p031_write(client, MT9P031_GLOBAL_GAIN, data);
+
+ case V4L2_CID_HFLIP:
+ if (ctrl->val)
+ return mt9p031_set_mode2(mt9p031,
+ 0, MT9P031_READ_MODE_2_COL_MIR);
+ else
+ return mt9p031_set_mode2(mt9p031,
+ MT9P031_READ_MODE_2_COL_MIR, 0);
+
+ case V4L2_CID_VFLIP:
+ if (ctrl->val)
+ return mt9p031_set_mode2(mt9p031,
+ 0, MT9P031_READ_MODE_2_ROW_MIR);
+ else
+ return mt9p031_set_mode2(mt9p031,
+ MT9P031_READ_MODE_2_ROW_MIR, 0);
+
+ case V4L2_CID_TEST_PATTERN:
+ /* The digital side of the Black Level Calibration function must
+ * be disabled when generating a test pattern to avoid artifacts
+ * in the image. Activate (deactivate) the BLC-related controls
+ * when the test pattern is enabled (disabled).
+ */
+ v4l2_ctrl_activate(mt9p031->blc_auto, ctrl->val == 0);
+ v4l2_ctrl_activate(mt9p031->blc_offset, ctrl->val == 0);
+
+ if (!ctrl->val) {
+ /* Restore the BLC settings. */
+ ret = mt9p031_restore_blc(mt9p031);
+ if (ret < 0)
+ return ret;
+
+ return mt9p031_write(client, MT9P031_TEST_PATTERN,
+ MT9P031_TEST_PATTERN_DISABLE);
+ }
+
+ ret = mt9p031_write(client, MT9P031_TEST_PATTERN_GREEN, 0x05a0);
+ if (ret < 0)
+ return ret;
+ ret = mt9p031_write(client, MT9P031_TEST_PATTERN_RED, 0x0a50);
+ if (ret < 0)
+ return ret;
+ ret = mt9p031_write(client, MT9P031_TEST_PATTERN_BLUE, 0x0aa0);
+ if (ret < 0)
+ return ret;
+
+ /* Disable digital BLC when generating a test pattern. */
+ ret = mt9p031_set_mode2(mt9p031, MT9P031_READ_MODE_2_ROW_BLC,
+ 0);
+ if (ret < 0)
+ return ret;
+
+ ret = mt9p031_write(client, MT9P031_ROW_BLACK_DEF_OFFSET, 0);
+ if (ret < 0)
+ return ret;
+
+ return mt9p031_write(client, MT9P031_TEST_PATTERN,
+ ((ctrl->val - 1) << MT9P031_TEST_PATTERN_SHIFT)
+ | MT9P031_TEST_PATTERN_ENABLE);
+
+ case V4L2_CID_BLC_AUTO:
+ ret = mt9p031_set_mode2(mt9p031,
+ ctrl->val ? 0 : MT9P031_READ_MODE_2_ROW_BLC,
+ ctrl->val ? MT9P031_READ_MODE_2_ROW_BLC : 0);
+ if (ret < 0)
+ return ret;
+
+ return mt9p031_write(client, MT9P031_BLACK_LEVEL_CALIBRATION,
+ ctrl->val ? 0 : MT9P031_BLC_MANUAL_BLC);
+
+ case V4L2_CID_BLC_TARGET_LEVEL:
+ return mt9p031_write(client, MT9P031_ROW_BLACK_TARGET,
+ ctrl->val);
+
+ case V4L2_CID_BLC_ANALOG_OFFSET:
+ data = ctrl->val & ((1 << 9) - 1);
+
+ ret = mt9p031_write(client, MT9P031_GREEN1_OFFSET, data);
+ if (ret < 0)
+ return ret;
+ ret = mt9p031_write(client, MT9P031_GREEN2_OFFSET, data);
+ if (ret < 0)
+ return ret;
+ ret = mt9p031_write(client, MT9P031_RED_OFFSET, data);
+ if (ret < 0)
+ return ret;
+ return mt9p031_write(client, MT9P031_BLUE_OFFSET, data);
+
+ case V4L2_CID_BLC_DIGITAL_OFFSET:
+ return mt9p031_write(client, MT9P031_ROW_BLACK_DEF_OFFSET,
+ ctrl->val & ((1 << 12) - 1));
+ }
+
+ return 0;
+}
+
+static struct v4l2_ctrl_ops mt9p031_ctrl_ops = {
+ .s_ctrl = mt9p031_s_ctrl,
+};
+
+static const char * const mt9p031_test_pattern_menu[] = {
+ "Disabled",
+ "Color Field",
+ "Horizontal Gradient",
+ "Vertical Gradient",
+ "Diagonal Gradient",
+ "Classic Test Pattern",
+ "Walking 1s",
+ "Monochrome Horizontal Bars",
+ "Monochrome Vertical Bars",
+ "Vertical Color Bars",
+};
+
+static const struct v4l2_ctrl_config mt9p031_ctrls[] = {
+ {
+ .ops = &mt9p031_ctrl_ops,
+ .id = V4L2_CID_BLC_AUTO,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ .name = "BLC, Auto",
+ .min = 0,
+ .max = 1,
+ .step = 1,
+ .def = 1,
+ .flags = 0,
+ }, {
+ .ops = &mt9p031_ctrl_ops,
+ .id = V4L2_CID_BLC_TARGET_LEVEL,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "BLC Target Level",
+ .min = 0,
+ .max = 4095,
+ .step = 1,
+ .def = 168,
+ .flags = 0,
+ }, {
+ .ops = &mt9p031_ctrl_ops,
+ .id = V4L2_CID_BLC_ANALOG_OFFSET,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "BLC Analog Offset",
+ .min = -255,
+ .max = 255,
+ .step = 1,
+ .def = 32,
+ .flags = 0,
+ }, {
+ .ops = &mt9p031_ctrl_ops,
+ .id = V4L2_CID_BLC_DIGITAL_OFFSET,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "BLC Digital Offset",
+ .min = -2048,
+ .max = 2047,
+ .step = 1,
+ .def = 40,
+ .flags = 0,
+ }
+};
+
+/* -----------------------------------------------------------------------------
+ * V4L2 subdev core operations
+ */
+
+static int mt9p031_set_power(struct v4l2_subdev *subdev, int on)
+{
+ struct mt9p031 *mt9p031 = to_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) {
+ ret = __mt9p031_set_power(mt9p031, !!on);
+ if (ret < 0)
+ goto out;
+ }
+
+ /* Update the power count. */
+ mt9p031->power_count += on ? 1 : -1;
+ WARN_ON(mt9p031->power_count < 0);
+
+out:
+ mutex_unlock(&mt9p031->power_lock);
+ return ret;
+}
+
+/* -----------------------------------------------------------------------------
+ * V4L2 subdev internal operations
+ */
+
+static int mt9p031_registered(struct v4l2_subdev *subdev)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(subdev);
+ struct mt9p031 *mt9p031 = to_mt9p031(subdev);
+ s32 data;
+ int ret;
+
+ ret = mt9p031_power_on(mt9p031);
+ if (ret < 0) {
+ dev_err(&client->dev, "MT9P031 power up failed\n");
+ return ret;
+ }
+
+ /* Read out the chip version register */
+ data = mt9p031_read(client, MT9P031_CHIP_VERSION);
+ mt9p031_power_off(mt9p031);
+
+ if (data != MT9P031_CHIP_VERSION_VALUE) {
+ dev_err(&client->dev, "MT9P031 not detected, wrong version "
+ "0x%04x\n", data);
+ return -ENODEV;
+ }
+
+ dev_info(&client->dev, "MT9P031 detected at address 0x%02x\n",
+ client->addr);
+
+ return 0;
+}
+
+static int mt9p031_open(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh)
+{
+ struct mt9p031 *mt9p031 = to_mt9p031(subdev);
+ struct v4l2_mbus_framefmt *format;
+ struct v4l2_rect *crop;
+
+ crop = v4l2_subdev_get_try_crop(subdev, fh->pad, 0);
+ crop->left = MT9P031_COLUMN_START_DEF;
+ crop->top = MT9P031_ROW_START_DEF;
+ crop->width = MT9P031_WINDOW_WIDTH_DEF;
+ crop->height = MT9P031_WINDOW_HEIGHT_DEF;
+
+ format = v4l2_subdev_get_try_format(subdev, fh->pad, 0);
+
+ if (mt9p031->model == MT9P031_MODEL_MONOCHROME)
+ format->code = MEDIA_BUS_FMT_Y12_1X12;
+ else
+ format->code = MEDIA_BUS_FMT_SGRBG12_1X12;
+
+ format->width = MT9P031_WINDOW_WIDTH_DEF;
+ format->height = MT9P031_WINDOW_HEIGHT_DEF;
+ format->field = V4L2_FIELD_NONE;
+ format->colorspace = V4L2_COLORSPACE_SRGB;
+
+ return mt9p031_set_power(subdev, 1);
+}
+
+static int mt9p031_close(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh)
+{
+ return mt9p031_set_power(subdev, 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,
+ .enum_frame_size = mt9p031_enum_frame_size,
+ .get_fmt = mt9p031_get_format,
+ .set_fmt = mt9p031_set_format,
+ .get_selection = mt9p031_get_selection,
+ .set_selection = mt9p031_set_selection,
+};
+
+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,
+};
+
+/* -----------------------------------------------------------------------------
+ * Driver initialization and probing
+ */
+
+static struct mt9p031_platform_data *
+mt9p031_get_pdata(struct i2c_client *client)
+{
+ struct mt9p031_platform_data *pdata;
+ struct device_node *np;
+
+ if (!IS_ENABLED(CONFIG_OF) || !client->dev.of_node)
+ return client->dev.platform_data;
+
+ np = of_graph_get_next_endpoint(client->dev.of_node, NULL);
+ if (!np)
+ return NULL;
+
+ pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ goto done;
+
+ of_property_read_u32(np, "input-clock-frequency", &pdata->ext_freq);
+ of_property_read_u32(np, "pixel-clock-frequency", &pdata->target_freq);
+
+done:
+ of_node_put(np);
+ return pdata;
+}
+
+static int mt9p031_probe(struct i2c_client *client,
+ const struct i2c_device_id *did)
+{
+ struct mt9p031_platform_data *pdata = mt9p031_get_pdata(client);
+ struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
+ struct mt9p031 *mt9p031;
+ unsigned int i;
+ int ret;
+
+ if (pdata == NULL) {
+ dev_err(&client->dev, "No platform data\n");
+ return -EINVAL;
+ }
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
+ dev_warn(&client->dev,
+ "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
+ return -EIO;
+ }
+
+ mt9p031 = devm_kzalloc(&client->dev, sizeof(*mt9p031), GFP_KERNEL);
+ if (mt9p031 == NULL)
+ return -ENOMEM;
+
+ mt9p031->pdata = pdata;
+ mt9p031->output_control = MT9P031_OUTPUT_CONTROL_DEF;
+ mt9p031->mode2 = MT9P031_READ_MODE_2_ROW_BLC;
+ mt9p031->model = did->driver_data;
+
+ mt9p031->regulators[0].supply = "vdd";
+ mt9p031->regulators[1].supply = "vdd_io";
+ mt9p031->regulators[2].supply = "vaa";
+
+ ret = devm_regulator_bulk_get(&client->dev, 3, mt9p031->regulators);
+ if (ret < 0) {
+ dev_err(&client->dev, "Unable to get regulators\n");
+ return ret;
+ }
+
+ mutex_init(&mt9p031->power_lock);
+
+ v4l2_ctrl_handler_init(&mt9p031->ctrls, ARRAY_SIZE(mt9p031_ctrls) + 6);
+
+ v4l2_ctrl_new_std(&mt9p031->ctrls, &mt9p031_ctrl_ops,
+ V4L2_CID_EXPOSURE, MT9P031_SHUTTER_WIDTH_MIN,
+ MT9P031_SHUTTER_WIDTH_MAX, 1,
+ MT9P031_SHUTTER_WIDTH_DEF);
+ v4l2_ctrl_new_std(&mt9p031->ctrls, &mt9p031_ctrl_ops,
+ V4L2_CID_GAIN, MT9P031_GLOBAL_GAIN_MIN,
+ MT9P031_GLOBAL_GAIN_MAX, 1, MT9P031_GLOBAL_GAIN_DEF);
+ v4l2_ctrl_new_std(&mt9p031->ctrls, &mt9p031_ctrl_ops,
+ V4L2_CID_HFLIP, 0, 1, 1, 0);
+ v4l2_ctrl_new_std(&mt9p031->ctrls, &mt9p031_ctrl_ops,
+ V4L2_CID_VFLIP, 0, 1, 1, 0);
+ v4l2_ctrl_new_std(&mt9p031->ctrls, &mt9p031_ctrl_ops,
+ V4L2_CID_PIXEL_RATE, pdata->target_freq,
+ pdata->target_freq, 1, pdata->target_freq);
+ v4l2_ctrl_new_std_menu_items(&mt9p031->ctrls, &mt9p031_ctrl_ops,
+ V4L2_CID_TEST_PATTERN,
+ ARRAY_SIZE(mt9p031_test_pattern_menu) - 1, 0,
+ 0, mt9p031_test_pattern_menu);
+
+ for (i = 0; i < ARRAY_SIZE(mt9p031_ctrls); ++i)
+ v4l2_ctrl_new_custom(&mt9p031->ctrls, &mt9p031_ctrls[i], NULL);
+
+ mt9p031->subdev.ctrl_handler = &mt9p031->ctrls;
+
+ if (mt9p031->ctrls.error) {
+ printk(KERN_INFO "%s: control initialization error %d\n",
+ __func__, mt9p031->ctrls.error);
+ ret = mt9p031->ctrls.error;
+ goto done;
+ }
+
+ mt9p031->blc_auto = v4l2_ctrl_find(&mt9p031->ctrls, V4L2_CID_BLC_AUTO);
+ mt9p031->blc_offset = v4l2_ctrl_find(&mt9p031->ctrls,
+ V4L2_CID_BLC_DIGITAL_OFFSET);
+
+ v4l2_i2c_subdev_init(&mt9p031->subdev, client, &mt9p031_subdev_ops);
+ mt9p031->subdev.internal_ops = &mt9p031_subdev_internal_ops;
+
+ mt9p031->pad.flags = MEDIA_PAD_FL_SOURCE;
+ ret = media_entity_init(&mt9p031->subdev.entity, 1, &mt9p031->pad, 0);
+ if (ret < 0)
+ goto done;
+
+ mt9p031->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+
+ mt9p031->crop.width = MT9P031_WINDOW_WIDTH_DEF;
+ mt9p031->crop.height = MT9P031_WINDOW_HEIGHT_DEF;
+ mt9p031->crop.left = MT9P031_COLUMN_START_DEF;
+ mt9p031->crop.top = MT9P031_ROW_START_DEF;
+
+ if (mt9p031->model == MT9P031_MODEL_MONOCHROME)
+ mt9p031->format.code = MEDIA_BUS_FMT_Y12_1X12;
+ else
+ mt9p031->format.code = MEDIA_BUS_FMT_SGRBG12_1X12;
+
+ mt9p031->format.width = MT9P031_WINDOW_WIDTH_DEF;
+ mt9p031->format.height = MT9P031_WINDOW_HEIGHT_DEF;
+ mt9p031->format.field = V4L2_FIELD_NONE;
+ mt9p031->format.colorspace = V4L2_COLORSPACE_SRGB;
+
+ mt9p031->reset = devm_gpiod_get_optional(&client->dev, "reset",
+ GPIOD_OUT_HIGH);
+
+ ret = mt9p031_clk_setup(mt9p031);
+ if (ret)
+ goto done;
+
+ ret = v4l2_async_register_subdev(&mt9p031->subdev);
+
+done:
+ if (ret < 0) {
+ v4l2_ctrl_handler_free(&mt9p031->ctrls);
+ media_entity_cleanup(&mt9p031->subdev.entity);
+ mutex_destroy(&mt9p031->power_lock);
+ }
+
+ return ret;
+}
+
+static int mt9p031_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *subdev = i2c_get_clientdata(client);
+ struct mt9p031 *mt9p031 = to_mt9p031(subdev);
+
+ v4l2_ctrl_handler_free(&mt9p031->ctrls);
+ v4l2_async_unregister_subdev(subdev);
+ media_entity_cleanup(&subdev->entity);
+ mutex_destroy(&mt9p031->power_lock);
+
+ return 0;
+}
+
+static const struct i2c_device_id mt9p031_id[] = {
+ { "mt9p031", MT9P031_MODEL_COLOR },
+ { "mt9p031m", MT9P031_MODEL_MONOCHROME },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, mt9p031_id);
+
+#if IS_ENABLED(CONFIG_OF)
+static const struct of_device_id mt9p031_of_match[] = {
+ { .compatible = "aptina,mt9p031", },
+ { .compatible = "aptina,mt9p031m", },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, mt9p031_of_match);
+#endif
+
+static struct i2c_driver mt9p031_i2c_driver = {
+ .driver = {
+ .of_match_table = of_match_ptr(mt9p031_of_match),
+ .name = "mt9p031",
+ },
+ .probe = mt9p031_probe,
+ .remove = mt9p031_remove,
+ .id_table = mt9p031_id,
+};
+
+module_i2c_driver(mt9p031_i2c_driver);
+
+MODULE_DESCRIPTION("Aptina MT9P031 Camera driver");
+MODULE_AUTHOR("Bastian Hecht <hechtb@gmail.com>");
+MODULE_LICENSE("GPL v2");
Code Review / kvmfornfv.git / blobdiff