lkml.org 
[lkml]   [2018]   [Mar]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v3 2/2] media: ov2680: Add Omnivision OV2680 sensor driver
Date
This patch adds V4L2 sub-device driver for OV2680 image sensor.
The OV2680 is a 1/5" CMOS color sensor from Omnivision.
Supports output format: 10-bit Raw RGB.
The OV2680 has a single lane MIPI interface.

The driver exposes following V4L2 controls:
- auto/manual exposure,
- exposure,
- auto/manual gain,
- gain,
- horizontal/vertical flip,
- test pattern menu.
Supported resolution are only: QUXGA, 720P, UXGA.

Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
---
drivers/media/i2c/Kconfig | 12 +
drivers/media/i2c/Makefile | 1 +
drivers/media/i2c/ov2680.c | 1130 ++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 1143 insertions(+)
create mode 100644 drivers/media/i2c/ov2680.c

diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index 9f18cd296841..39dc9f236ffa 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -586,6 +586,18 @@ config VIDEO_OV2659
To compile this driver as a module, choose M here: the
module will be called ov2659.

+config VIDEO_OV2680
+ tristate "OmniVision OV2680 sensor support"
+ depends on GPIOLIB && VIDEO_V4L2 && I2C && VIDEO_V4L2_SUBDEV_API
+ depends on MEDIA_CAMERA_SUPPORT
+ select V4L2_FWNODE
+ ---help---
+ This is a Video4Linux2 sensor-level driver for the OmniVision
+ OV2680 camera sensor with a MIPI CSI-2 interface.
+
+ To compile this driver as a module, choose M here: the
+ module will be called ov2680.
+
config VIDEO_OV5640
tristate "OmniVision OV5640 sensor support"
depends on OF
diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
index c0f94cd8d56d..d0aba4d37b8d 100644
--- a/drivers/media/i2c/Makefile
+++ b/drivers/media/i2c/Makefile
@@ -61,6 +61,7 @@ obj-$(CONFIG_VIDEO_SONY_BTF_MPX) += sony-btf-mpx.o
obj-$(CONFIG_VIDEO_UPD64031A) += upd64031a.o
obj-$(CONFIG_VIDEO_UPD64083) += upd64083.o
obj-$(CONFIG_VIDEO_OV2640) += ov2640.o
+obj-$(CONFIG_VIDEO_OV2680) += ov2680.o
obj-$(CONFIG_VIDEO_OV5640) += ov5640.o
obj-$(CONFIG_VIDEO_OV5645) += ov5645.o
obj-$(CONFIG_VIDEO_OV5647) += ov5647.o
diff --git a/drivers/media/i2c/ov2680.c b/drivers/media/i2c/ov2680.c
new file mode 100644
index 000000000000..a17971ce71bc
--- /dev/null
+++ b/drivers/media/i2c/ov2680.c
@@ -0,0 +1,1130 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Omnivision OV2680 CMOS Image Sensor driver
+ *
+ * Copyright (C) 2018 Linaro Ltd
+ *
+ * Based on OV5640 Sensor Driver
+ * Copyright (C) 2011-2013 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright (C) 2014-2017 Mentor Graphics Inc.
+ *
+ */
+
+#include <asm/unaligned.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/gpio/consumer.h>
+
+#include <media/v4l2-common.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-subdev.h>
+
+#define OV2680_XVCLK_MIN 6000000
+#define OV2680_XVCLK_MAX 24000000
+
+#define OV2680_CHIP_ID 0x2680
+
+#define OV2680_REG_STREAM_CTRL 0x0100
+#define OV2680_REG_SOFT_RESET 0x0103
+
+#define OV2680_REG_CHIP_ID_HIGH 0x300a
+#define OV2680_REG_CHIP_ID_LOW 0x300b
+
+#define OV2680_REG_R_MANUAL 0x3503
+#define OV2680_REG_GAIN_PK 0x350a
+#define OV2680_REG_EXPOSURE_PK_HIGH 0x3500
+#define OV2680_REG_TIMING_HTS 0x380c
+#define OV2680_REG_TIMING_VTS 0x380e
+#define OV2680_REG_FORMAT1 0x3820
+#define OV2680_REG_FORMAT2 0x3821
+
+#define OV2680_REG_ISP_CTRL00 0x5080
+
+#define OV2680_FRAME_RATE 30
+
+#define OV2680_REG_VALUE_8BIT 1
+#define OV2680_REG_VALUE_16BIT 2
+#define OV2680_REG_VALUE_24BIT 3
+
+enum ov2680_mode_id {
+ OV2680_MODE_QUXGA_800_600,
+ OV2680_MODE_720P_1280_720,
+ OV2680_MODE_UXGA_1600_1200,
+ OV2680_MODE_MAX,
+};
+
+struct reg_value {
+ u16 reg_addr;
+ u8 val;
+};
+
+struct ov2680_mode_info {
+ const char *name;
+ enum ov2680_mode_id id;
+ u32 width;
+ u32 height;
+ const struct reg_value *reg_data;
+ u32 reg_data_size;
+};
+
+struct ov2680_ctrls {
+ struct v4l2_ctrl_handler handler;
+ struct {
+ struct v4l2_ctrl *auto_exp;
+ struct v4l2_ctrl *exposure;
+ };
+ struct {
+ struct v4l2_ctrl *auto_gain;
+ struct v4l2_ctrl *gain;
+ };
+
+ struct v4l2_ctrl *hflip;
+ struct v4l2_ctrl *vflip;
+ struct v4l2_ctrl *test_pattern;
+};
+
+struct ov2680_dev {
+ struct i2c_client *i2c_client;
+ struct v4l2_subdev sd;
+
+ struct media_pad pad;
+ struct clk *xvclk;
+ u32 xvclk_freq;
+
+ struct gpio_desc *pwdn_gpio;
+ struct mutex lock; /* protect members */
+
+ bool mode_pending_changes;
+ bool is_enabled;
+ bool is_streaming;
+
+ struct ov2680_ctrls ctrls;
+ struct v4l2_mbus_framefmt fmt;
+ struct v4l2_fract frame_interval;
+
+ const struct ov2680_mode_info *current_mode;
+};
+
+static const char * const test_pattern_menu[] = {
+ "Disabled",
+ "Color Bars",
+ "Random Data",
+ "Square",
+ "Black Image",
+};
+
+static const int ov2680_hv_flip_bayer_order[] = {
+ MEDIA_BUS_FMT_SBGGR10_1X10,
+ MEDIA_BUS_FMT_SGRBG10_1X10,
+ MEDIA_BUS_FMT_SGBRG10_1X10,
+ MEDIA_BUS_FMT_SRGGB10_1X10,
+};
+
+static const struct reg_value ov2680_setting_30fps_QUXGA_800_600[] = {
+ {0x3086, 0x01}, {0x370a, 0x23}, {0x3808, 0x03}, {0x3809, 0x20},
+ {0x380a, 0x02}, {0x380b, 0x58}, {0x380c, 0x06}, {0x380d, 0xac},
+ {0x380e, 0x02}, {0x380f, 0x84}, {0x3811, 0x04}, {0x3813, 0x04},
+ {0x3814, 0x31}, {0x3815, 0x31}, {0x3820, 0xc0}, {0x4008, 0x00},
+ {0x4009, 0x03}, {0x4837, 0x1e}, {0x3501, 0x4e}, {0x3502, 0xe0},
+};
+
+static const struct reg_value ov2680_setting_30fps_720P_1280_720[] = {
+ {0x3086, 0x00}, {0x3808, 0x05}, {0x3809, 0x00}, {0x380a, 0x02},
+ {0x380b, 0xd0}, {0x380c, 0x06}, {0x380d, 0xa8}, {0x380e, 0x05},
+ {0x380f, 0x0e}, {0x3811, 0x08}, {0x3813, 0x06}, {0x3814, 0x11},
+ {0x3815, 0x11}, {0x3820, 0xc0}, {0x4008, 0x00},
+};
+
+static const struct reg_value ov2680_setting_30fps_UXGA_1600_1200[] = {
+ {0x3086, 0x00}, {0x3501, 0x4e}, {0x3502, 0xe0}, {0x3808, 0x06},
+ {0x3809, 0x40}, {0x380a, 0x04}, {0x380b, 0xb0}, {0x380c, 0x06},
+ {0x380d, 0xa8}, {0x380e, 0x05}, {0x380f, 0x0e}, {0x3811, 0x00},
+ {0x3813, 0x00}, {0x3814, 0x11}, {0x3815, 0x11}, {0x3820, 0xc0},
+ {0x4008, 0x00}, {0x4837, 0x18}
+};
+
+static const struct ov2680_mode_info ov2680_mode_init_data = {
+ "mode_quxga_800_600", OV2680_MODE_QUXGA_800_600, 800, 600,
+ ov2680_setting_30fps_QUXGA_800_600,
+ ARRAY_SIZE(ov2680_setting_30fps_QUXGA_800_600),
+};
+
+static const struct ov2680_mode_info ov2680_mode_data[OV2680_MODE_MAX] = {
+ {"mode_quxga_800_600", OV2680_MODE_QUXGA_800_600,
+ 800, 600, ov2680_setting_30fps_QUXGA_800_600,
+ ARRAY_SIZE(ov2680_setting_30fps_QUXGA_800_600)},
+ {"mode_720p_1280_720", OV2680_MODE_720P_1280_720,
+ 1280, 720, ov2680_setting_30fps_720P_1280_720,
+ ARRAY_SIZE(ov2680_setting_30fps_720P_1280_720)},
+ {"mode_uxga_1600_1200", OV2680_MODE_UXGA_1600_1200,
+ 1600, 1200, ov2680_setting_30fps_UXGA_1600_1200,
+ ARRAY_SIZE(ov2680_setting_30fps_UXGA_1600_1200)},
+};
+
+static struct ov2680_dev *to_ov2680_dev(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct ov2680_dev, sd);
+}
+
+static struct device *ov2680_to_dev(struct ov2680_dev *sensor)
+{
+ return &sensor->i2c_client->dev;
+}
+
+static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl)
+{
+ return &container_of(ctrl->handler, struct ov2680_dev,
+ ctrls.handler)->sd;
+}
+
+static int __ov2680_write_reg(struct ov2680_dev *sensor, u16 reg,
+ unsigned int len, u32 val)
+{
+ struct i2c_client *client = sensor->i2c_client;
+ u8 buf[6];
+ int ret;
+
+ if (len > 4)
+ return -EINVAL;
+
+ put_unaligned_be16(reg, buf);
+ put_unaligned_be32(val << (8 * (4 - len)), buf + 2);
+ ret = i2c_master_send(client, buf, len + 2);
+ if (ret != len + 2) {
+ dev_err(&client->dev, "write error: reg=0x%4x: %d\n", reg, ret);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+#define ov2680_write_reg(s, r, v) \
+ __ov2680_write_reg(s, r, OV2680_REG_VALUE_8BIT, v)
+
+#define ov2680_write_reg16(s, r, v) \
+ __ov2680_write_reg(s, r, OV2680_REG_VALUE_16BIT, v)
+
+#define ov2680_write_reg24(s, r, v) \
+ __ov2680_write_reg(s, r, OV2680_REG_VALUE_24BIT, v)
+
+static int __ov2680_read_reg(struct ov2680_dev *sensor, u16 reg,
+ unsigned int len, u32 *val)
+{
+ struct i2c_client *client = sensor->i2c_client;
+ struct i2c_msg msgs[2];
+ u8 addr_buf[2] = { reg >> 8, reg & 0xff };
+ u8 data_buf[4] = { 0, };
+ int ret;
+
+ if (len > 4)
+ return -EINVAL;
+
+ msgs[0].addr = client->addr;
+ msgs[0].flags = 0;
+ msgs[0].len = ARRAY_SIZE(addr_buf);
+ msgs[0].buf = addr_buf;
+
+ msgs[1].addr = client->addr;
+ msgs[1].flags = I2C_M_RD;
+ msgs[1].len = len;
+ msgs[1].buf = &data_buf[4 - len];
+
+ ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
+ if (ret != ARRAY_SIZE(msgs)) {
+ dev_err(&client->dev, "read error: reg=0x%4x: %d\n", reg, ret);
+ return -EIO;
+ }
+
+ *val = get_unaligned_be32(data_buf);
+
+ return 0;
+}
+
+#define ov2680_read_reg(s, r, v) \
+ __ov2680_read_reg(s, r, OV2680_REG_VALUE_8BIT, v)
+
+#define ov2680_read_reg16(s, r, v) \
+ __ov2680_read_reg(s, r, OV2680_REG_VALUE_16BIT, v)
+
+#define ov2680_read_reg24(s, r, v) \
+ __ov2680_read_reg(s, r, OV2680_REG_VALUE_24BIT, v)
+
+static int ov2680_mod_reg(struct ov2680_dev *sensor, u16 reg, u8 mask, u8 val)
+{
+ u32 readval;
+ int ret;
+
+ ret = ov2680_read_reg(sensor, reg, &readval);
+ if (ret < 0)
+ return ret;
+
+ readval &= ~mask;
+ val &= mask;
+ val |= readval;
+
+ return ov2680_write_reg(sensor, reg, val);
+}
+
+static int ov2680_load_regs(struct ov2680_dev *sensor,
+ const struct ov2680_mode_info *mode)
+{
+ const struct reg_value *regs = mode->reg_data;
+ unsigned int i;
+ int ret = 0;
+ u16 reg_addr;
+ u8 val;
+
+ for (i = 0; i < mode->reg_data_size; ++i, ++regs) {
+ reg_addr = regs->reg_addr;
+ val = regs->val;
+
+ ret = ov2680_write_reg(sensor, reg_addr, val);
+ if (ret)
+ break;
+ }
+
+ return ret;
+}
+
+static void ov2680_power_up(struct ov2680_dev *sensor)
+{
+ if (!sensor->pwdn_gpio)
+ return;
+
+ gpiod_set_value(sensor->pwdn_gpio, 1);
+ usleep_range(5000, 10000);
+}
+
+static void ov2680_power_down(struct ov2680_dev *sensor)
+{
+ if (!sensor->pwdn_gpio)
+ return;
+
+ gpiod_set_value(sensor->pwdn_gpio, 0);
+ usleep_range(5000, 10000);
+}
+
+static int ov2680_bayer_order(struct ov2680_dev *sensor)
+{
+ u32 format1;
+ u32 format2;
+ u32 hv_flip;
+ int ret;
+
+ ret = ov2680_read_reg(sensor, OV2680_REG_FORMAT1, &format1);
+ if (ret < 0)
+ return ret;
+
+ ret = ov2680_read_reg(sensor, OV2680_REG_FORMAT2, &format2);
+ if (ret < 0)
+ return ret;
+
+ hv_flip = (format2 & BIT(2) << 1) | (format1 & BIT(2));
+
+ sensor->fmt.code = ov2680_hv_flip_bayer_order[hv_flip];
+
+ return 0;
+}
+
+static int ov2680_vflip_enable(struct ov2680_dev *sensor)
+{
+ int ret;
+
+ ret = ov2680_mod_reg(sensor, OV2680_REG_FORMAT1, BIT(2), BIT(2));
+ if (ret < 0)
+ return ret;
+
+ return ov2680_bayer_order(sensor);
+}
+
+static int ov2680_vflip_disable(struct ov2680_dev *sensor)
+{
+ int ret;
+
+ ret = ov2680_mod_reg(sensor, OV2680_REG_FORMAT1, BIT(2), BIT(0));
+ if (ret < 0)
+ return ret;
+
+ return ov2680_bayer_order(sensor);
+}
+
+static int ov2680_hflip_enable(struct ov2680_dev *sensor)
+{
+ int ret;
+
+ ret = ov2680_mod_reg(sensor, OV2680_REG_FORMAT2, BIT(2), BIT(2));
+ if (ret < 0)
+ return ret;
+
+ return ov2680_bayer_order(sensor);
+}
+
+static int ov2680_hflip_disable(struct ov2680_dev *sensor)
+{
+ int ret;
+
+ ret = ov2680_mod_reg(sensor, OV2680_REG_FORMAT2, BIT(2), BIT(0));
+ if (ret < 0)
+ return ret;
+
+ return ov2680_bayer_order(sensor);
+}
+
+static int ov2680_test_pattern_set(struct ov2680_dev *sensor, int value)
+{
+ int ret;
+
+ if (!value)
+ return ov2680_mod_reg(sensor, OV2680_REG_ISP_CTRL00, BIT(7), 0);
+
+ ret = ov2680_mod_reg(sensor, OV2680_REG_ISP_CTRL00, 0x03, value - 1);
+ if (ret < 0)
+ return ret;
+
+ ret = ov2680_mod_reg(sensor, OV2680_REG_ISP_CTRL00, BIT(7), BIT(7));
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int ov2680_gain_set(struct ov2680_dev *sensor, bool auto_gain)
+{
+ struct ov2680_ctrls *ctrls = &sensor->ctrls;
+ u32 gain;
+ int ret;
+
+ ret = ov2680_mod_reg(sensor, OV2680_REG_R_MANUAL, BIT(1),
+ auto_gain ? 0 : BIT(1));
+ if (ret < 0)
+ return ret;
+
+ if (auto_gain || !ctrls->gain->is_new)
+ return 0;
+
+ gain = ctrls->gain->val;
+
+ ret = ov2680_write_reg16(sensor, OV2680_REG_GAIN_PK, gain);
+
+ return 0;
+}
+
+static int ov2680_gain_get(struct ov2680_dev *sensor)
+{
+ u32 gain;
+ int ret;
+
+ ret = ov2680_read_reg16(sensor, OV2680_REG_GAIN_PK, &gain);
+ if (ret)
+ return ret;
+
+ return gain;
+}
+
+static int ov2680_auto_gain_enable(struct ov2680_dev *sensor)
+{
+ return ov2680_gain_set(sensor, true);
+}
+
+static int ov2680_auto_gain_disable(struct ov2680_dev *sensor)
+{
+ return ov2680_gain_set(sensor, false);
+}
+
+static int ov2680_exposure_set(struct ov2680_dev *sensor, bool auto_exp)
+{
+ struct ov2680_ctrls *ctrls = &sensor->ctrls;
+ u32 exp;
+ int ret;
+
+ ret = ov2680_mod_reg(sensor, OV2680_REG_R_MANUAL, BIT(0),
+ auto_exp ? 0 : BIT(0));
+ if (ret < 0)
+ return ret;
+
+ if (auto_exp || !ctrls->exposure->is_new)
+ return 0;
+
+ exp = (u32)ctrls->exposure->val;
+ exp <<= 4;
+
+ return ov2680_write_reg24(sensor, OV2680_REG_EXPOSURE_PK_HIGH, exp);
+}
+
+static int ov2680_exposure_get(struct ov2680_dev *sensor)
+{
+ int ret;
+ u32 exp;
+
+ ret = ov2680_read_reg24(sensor, OV2680_REG_EXPOSURE_PK_HIGH, &exp);
+ if (ret)
+ return ret;
+
+ return exp >> 4;
+}
+
+static int ov2680_auto_exposure_enable(struct ov2680_dev *sensor)
+{
+ return ov2680_exposure_set(sensor, true);
+}
+
+static int ov2680_auto_exposure_disable(struct ov2680_dev *sensor)
+{
+ return ov2680_exposure_set(sensor, false);
+}
+
+static int ov2680_stream_enable(struct ov2680_dev *sensor)
+{
+ return ov2680_write_reg(sensor, OV2680_REG_STREAM_CTRL, 1);
+}
+
+static int ov2680_stream_disable(struct ov2680_dev *sensor)
+{
+ return ov2680_write_reg(sensor, OV2680_REG_STREAM_CTRL, 0);
+}
+
+static int ov2680_mode_set(struct ov2680_dev *sensor)
+{
+ struct ov2680_ctrls *ctrls = &sensor->ctrls;
+ int ret;
+
+ ret = ov2680_auto_gain_disable(sensor);
+ if (ret < 0)
+ return ret;
+
+ ret = ov2680_auto_exposure_disable(sensor);
+ if (ret < 0)
+ return ret;
+
+ ret = ov2680_load_regs(sensor, sensor->current_mode);
+ if (ret < 0)
+ return ret;
+
+ if (ctrls->auto_gain->val) {
+ ret = ov2680_auto_gain_enable(sensor);
+ if (ret < 0)
+ return ret;
+ }
+
+ if (ctrls->auto_exp->val == V4L2_EXPOSURE_AUTO) {
+ ret = ov2680_auto_exposure_enable(sensor);
+ if (ret < 0)
+ return ret;
+ }
+
+ sensor->mode_pending_changes = false;
+
+ return 0;
+}
+
+static int ov2680_mode_restore(struct ov2680_dev *sensor)
+{
+ int ret;
+
+ ret = ov2680_load_regs(sensor, &ov2680_mode_init_data);
+ if (ret < 0)
+ return ret;
+
+ return ov2680_mode_set(sensor);
+}
+
+static int ov2680_power_off(struct ov2680_dev *sensor)
+{
+ if (!sensor->is_enabled)
+ return 0;
+
+ clk_disable_unprepare(sensor->xvclk);
+ ov2680_power_down(sensor);
+ sensor->is_enabled = false;
+
+ return 0;
+}
+
+static int ov2680_power_on(struct ov2680_dev *sensor)
+{
+ struct device *dev = ov2680_to_dev(sensor);
+ int ret;
+
+ if (sensor->is_enabled)
+ return 0;
+
+ if (!sensor->pwdn_gpio) {
+ ret = ov2680_write_reg(sensor, OV2680_REG_SOFT_RESET, 0x01);
+ if (ret != 0) {
+ dev_err(dev, "sensor soft reset failed\n");
+ return ret;
+ }
+ usleep_range(1000, 2000);
+ } else {
+ ov2680_power_down(sensor);
+ ov2680_power_up(sensor);
+ }
+
+ ret = clk_prepare_enable(sensor->xvclk);
+ if (ret < 0)
+ return ret;
+
+ ret = ov2680_mode_restore(sensor);
+ if (ret < 0)
+ goto disable;
+
+ sensor->is_enabled = true;
+
+ /* Set clock lane into LP-11 state */
+ ov2680_stream_enable(sensor);
+ usleep_range(1000, 2000);
+ ov2680_stream_disable(sensor);
+
+ return 0;
+
+disable:
+ dev_err(dev, "failed to enable sensor: %d\n", ret);
+ ov2680_power_off(sensor);
+
+ return ret;
+}
+
+static int ov2680_s_power(struct v4l2_subdev *sd, int on)
+{
+ struct ov2680_dev *sensor = to_ov2680_dev(sd);
+ int ret = 0;
+
+ mutex_lock(&sensor->lock);
+
+ if (on)
+ ret = ov2680_power_on(sensor);
+ else
+ ret = ov2680_power_off(sensor);
+
+ mutex_unlock(&sensor->lock);
+
+ if (on && ret == 0) {
+ ret = v4l2_ctrl_handler_setup(&sensor->ctrls.handler);
+ if (ret < 0)
+ return ret;
+ }
+
+ return ret;
+}
+
+static int ov2680_s_g_frame_interval(struct v4l2_subdev *sd,
+ struct v4l2_subdev_frame_interval *fi)
+{
+ struct ov2680_dev *sensor = to_ov2680_dev(sd);
+
+ mutex_lock(&sensor->lock);
+ fi->interval = sensor->frame_interval;
+ mutex_unlock(&sensor->lock);
+
+ return 0;
+}
+
+static int ov2680_s_stream(struct v4l2_subdev *sd, int enable)
+{
+ struct ov2680_dev *sensor = to_ov2680_dev(sd);
+ int ret = 0;
+
+ mutex_lock(&sensor->lock);
+
+ if (sensor->is_streaming == !!enable)
+ goto unlock;
+
+ if (enable && sensor->mode_pending_changes) {
+ ret = ov2680_mode_set(sensor);
+ if (ret < 0)
+ goto unlock;
+ }
+
+ if (enable)
+ ret = ov2680_stream_enable(sensor);
+ else
+ ret = ov2680_stream_disable(sensor);
+
+ sensor->is_streaming = !!enable;
+
+unlock:
+ mutex_unlock(&sensor->lock);
+
+ return ret;
+}
+
+static int ov2680_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ struct ov2680_dev *sensor = to_ov2680_dev(sd);
+
+ if (code->pad != 0 || code->index != 0)
+ return -EINVAL;
+
+ code->code = sensor->fmt.code;
+
+ return 0;
+}
+
+static int ov2680_get_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *format)
+{
+ struct ov2680_dev *sensor = to_ov2680_dev(sd);
+ struct v4l2_mbus_framefmt *fmt;
+
+ if (format->pad != 0)
+ return -EINVAL;
+
+ mutex_lock(&sensor->lock);
+
+ if (format->which == V4L2_SUBDEV_FORMAT_TRY)
+ fmt = v4l2_subdev_get_try_format(&sensor->sd, cfg, format->pad);
+ else
+ fmt = &sensor->fmt;
+
+ format->format = *fmt;
+
+ mutex_unlock(&sensor->lock);
+
+ return 0;
+}
+
+static int ov2680_set_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *format)
+{
+ struct ov2680_dev *sensor = to_ov2680_dev(sd);
+ struct v4l2_mbus_framefmt *fmt = &format->format;
+ const struct ov2680_mode_info *mode;
+ int ret = 0;
+
+ if (format->pad != 0)
+ return -EINVAL;
+
+ mutex_lock(&sensor->lock);
+
+ if (sensor->is_streaming) {
+ ret = -EBUSY;
+ goto unlock;
+ }
+
+ mode = v4l2_find_nearest_size(ov2680_mode_data,
+ ARRAY_SIZE(ov2680_mode_data), width,
+ height, fmt->width, fmt->height);
+ if (!mode) {
+ ret = -EINVAL;
+ goto unlock;
+ }
+
+ if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
+ fmt = v4l2_subdev_get_try_format(sd, cfg, 0);
+
+ *fmt = format->format;
+ goto unlock;
+ }
+
+ fmt->width = mode->width;
+ fmt->height = mode->height;
+ fmt->code = sensor->fmt.code;
+ fmt->colorspace = sensor->fmt.colorspace;
+
+ sensor->current_mode = mode;
+ sensor->fmt = format->format;
+ sensor->mode_pending_changes = true;
+
+unlock:
+ mutex_unlock(&sensor->lock);
+
+ return ret;
+}
+
+static int ov2680_enum_frame_size(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_frame_size_enum *fse)
+{
+ int index = fse->index;
+
+ if (index >= OV2680_MODE_MAX)
+ return -EINVAL;
+
+ fse->min_width = ov2680_mode_data[index].width;
+ fse->min_height = ov2680_mode_data[index].height;
+ fse->max_width = ov2680_mode_data[index].width;
+ fse->max_height = ov2680_mode_data[index].height;
+
+ return 0;
+}
+
+static int ov2680_enum_frame_interval(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_frame_interval_enum *fie)
+{
+ struct v4l2_fract tpf;
+
+ tpf.denominator = OV2680_FRAME_RATE;
+ tpf.numerator = 1;
+
+ fie->interval = tpf;
+
+ return 0;
+}
+
+static int ov2680_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct v4l2_subdev *sd = ctrl_to_sd(ctrl);
+ struct ov2680_dev *sensor = to_ov2680_dev(sd);
+ int val;
+
+ if (!sensor->is_enabled)
+ return 0;
+
+ switch (ctrl->id) {
+ case V4L2_CID_AUTOGAIN:
+ if (!ctrl->val)
+ return 0;
+ val = ov2680_gain_get(sensor);
+ if (val < 0)
+ return val;
+ sensor->ctrls.gain->val = val;
+ break;
+ case V4L2_CID_EXPOSURE_AUTO:
+ if (ctrl->val == V4L2_EXPOSURE_MANUAL)
+ return 0;
+ val = ov2680_exposure_get(sensor);
+ if (val < 0)
+ return val;
+ sensor->ctrls.exposure->val = val;
+ break;
+ }
+
+ return 0;
+}
+
+static int ov2680_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct v4l2_subdev *sd = ctrl_to_sd(ctrl);
+ struct ov2680_dev *sensor = to_ov2680_dev(sd);
+
+ if (!sensor->is_enabled)
+ return 0;
+
+ switch (ctrl->id) {
+ case V4L2_CID_AUTOGAIN:
+ return ov2680_gain_set(sensor, !!ctrl->val);
+ case V4L2_CID_EXPOSURE_AUTO:
+ return ov2680_exposure_set(sensor, !!ctrl->val);
+ case V4L2_CID_VFLIP:
+ if (sensor->is_streaming)
+ return -EBUSY;
+ if (ctrl->val)
+ return ov2680_vflip_enable(sensor);
+ else
+ return ov2680_vflip_disable(sensor);
+ case V4L2_CID_HFLIP:
+ if (ctrl->val)
+ return ov2680_hflip_enable(sensor);
+ else
+ return ov2680_hflip_disable(sensor);
+ case V4L2_CID_TEST_PATTERN:
+ return ov2680_test_pattern_set(sensor, ctrl->val);
+ default:
+ break;
+ }
+
+ return -EINVAL;
+}
+
+static const struct v4l2_ctrl_ops ov2680_ctrl_ops = {
+ .g_volatile_ctrl = ov2680_g_volatile_ctrl,
+ .s_ctrl = ov2680_s_ctrl,
+};
+
+static const struct v4l2_subdev_core_ops ov2680_core_ops = {
+ .s_power = ov2680_s_power,
+};
+
+static const struct v4l2_subdev_video_ops ov2680_video_ops = {
+ .g_frame_interval = ov2680_s_g_frame_interval,
+ .s_frame_interval = ov2680_s_g_frame_interval,
+ .s_stream = ov2680_s_stream,
+};
+
+static const struct v4l2_subdev_pad_ops ov2680_pad_ops = {
+ .enum_mbus_code = ov2680_enum_mbus_code,
+ .get_fmt = ov2680_get_fmt,
+ .set_fmt = ov2680_set_fmt,
+ .enum_frame_size = ov2680_enum_frame_size,
+ .enum_frame_interval = ov2680_enum_frame_interval,
+};
+
+static const struct v4l2_subdev_ops ov2680_subdev_ops = {
+ .core = &ov2680_core_ops,
+ .video = &ov2680_video_ops,
+ .pad = &ov2680_pad_ops,
+};
+
+static int ov2680_mode_init(struct ov2680_dev *sensor)
+{
+ const struct ov2680_mode_info *init_mode;
+
+ /* set initial mode */
+ sensor->fmt.code = MEDIA_BUS_FMT_SBGGR10_1X10;
+ sensor->fmt.width = 800;
+ sensor->fmt.height = 600;
+ sensor->fmt.field = V4L2_FIELD_NONE;
+ sensor->fmt.colorspace = V4L2_COLORSPACE_SRGB;
+
+ sensor->frame_interval.denominator = OV2680_FRAME_RATE;
+ sensor->frame_interval.numerator = 1;
+
+ init_mode = &ov2680_mode_init_data;
+
+ sensor->current_mode = init_mode;
+
+ sensor->mode_pending_changes = true;
+
+ return 0;
+}
+
+static int ov2680_v4l2_init(struct ov2680_dev *sensor)
+{
+ const struct v4l2_ctrl_ops *ops = &ov2680_ctrl_ops;
+ struct ov2680_ctrls *ctrls = &sensor->ctrls;
+ struct v4l2_ctrl_handler *hdl = &ctrls->handler;
+ int ret = 0;
+
+ v4l2_i2c_subdev_init(&sensor->sd, sensor->i2c_client,
+ &ov2680_subdev_ops);
+
+ sensor->sd.flags = V4L2_SUBDEV_FL_HAS_DEVNODE;
+ sensor->pad.flags = MEDIA_PAD_FL_SOURCE;
+ sensor->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
+
+ ret = media_entity_pads_init(&sensor->sd.entity, 1, &sensor->pad);
+ if (ret < 0)
+ return ret;
+
+ v4l2_ctrl_handler_init(hdl, 32);
+
+ hdl->lock = &sensor->lock;
+
+ ctrls->vflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VFLIP, 0, 1, 1, 0);
+ ctrls->hflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
+
+ ctrls->test_pattern = v4l2_ctrl_new_std_menu_items(hdl,
+ &ov2680_ctrl_ops,
+ V4L2_CID_TEST_PATTERN,
+ ARRAY_SIZE(test_pattern_menu) - 1,
+ 0, 0, test_pattern_menu);
+
+ ctrls->auto_exp = v4l2_ctrl_new_std_menu(hdl, ops,
+ V4L2_CID_EXPOSURE_AUTO,
+ V4L2_EXPOSURE_MANUAL, 0,
+ V4L2_EXPOSURE_AUTO);
+
+ ctrls->exposure = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_EXPOSURE,
+ 0, 32767, 1, 0);
+
+ ctrls->auto_gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_AUTOGAIN,
+ 0, 1, 1, 1);
+ ctrls->gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAIN, 0, 2047, 1, 0);
+
+ if (hdl->error) {
+ ret = hdl->error;
+ goto cleanup_entity;
+ }
+
+ ctrls->gain->flags |= V4L2_CTRL_FLAG_VOLATILE;
+ ctrls->exposure->flags |= V4L2_CTRL_FLAG_VOLATILE;
+
+ v4l2_ctrl_auto_cluster(2, &ctrls->auto_gain, 0, true);
+ v4l2_ctrl_auto_cluster(2, &ctrls->auto_exp, 1, true);
+
+ sensor->sd.ctrl_handler = hdl;
+
+ ret = v4l2_async_register_subdev(&sensor->sd);
+ if (ret < 0)
+ goto cleanup_entity;
+
+ return 0;
+
+cleanup_entity:
+ media_entity_cleanup(&sensor->sd.entity);
+ v4l2_ctrl_handler_free(hdl);
+
+ return ret;
+}
+
+static int ov2680_check_id(struct ov2680_dev *sensor)
+{
+ struct device *dev = ov2680_to_dev(sensor);
+ u32 chip_id;
+ int ret;
+
+ ov2680_power_on(sensor);
+
+ ret = ov2680_read_reg16(sensor, OV2680_REG_CHIP_ID_HIGH, &chip_id);
+ if (ret < 0) {
+ dev_err(dev, "failed to read chip id high\n");
+ return -ENODEV;
+ }
+
+ if (chip_id != OV2680_CHIP_ID) {
+ dev_err(dev, "chip id: 0x%04x does not match expected 0x%04x\n",
+ chip_id, OV2680_CHIP_ID);
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static int ov2860_parse_dt(struct ov2680_dev *sensor)
+{
+ struct device *dev = ov2680_to_dev(sensor);
+ int ret;
+
+ sensor->pwdn_gpio = devm_gpiod_get_optional(dev, "powerdown",
+ GPIOD_OUT_HIGH);
+ ret = PTR_ERR_OR_ZERO(sensor->pwdn_gpio);
+ if (ret < 0) {
+ dev_dbg(dev, "error while getting powerdown gpio: %d\n", ret);
+ return ret;
+ }
+
+ sensor->xvclk = devm_clk_get(dev, "xvclk");
+ if (IS_ERR(sensor->xvclk)) {
+ dev_err(dev, "xvclk clock missing or invalid\n");
+ return PTR_ERR(sensor->xvclk);
+ }
+
+ sensor->xvclk_freq = clk_get_rate(sensor->xvclk);
+ if (sensor->xvclk_freq < OV2680_XVCLK_MIN ||
+ sensor->xvclk_freq > OV2680_XVCLK_MAX) {
+ dev_err(dev, "xvclk frequency out of range: %d Hz\n",
+ sensor->xvclk_freq);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int ov2680_probe(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ struct ov2680_dev *sensor;
+ int ret;
+
+ sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL);
+ if (!sensor)
+ return -ENOMEM;
+
+ sensor->i2c_client = client;
+
+ ret = ov2860_parse_dt(sensor);
+ if (ret < 0)
+ return -EINVAL;
+
+ ret = ov2680_mode_init(sensor);
+ if (ret < 0)
+ return ret;
+
+ mutex_init(&sensor->lock);
+
+ ret = ov2680_v4l2_init(sensor);
+ if (ret < 0)
+ goto lock_destroy;
+
+ ret = ov2680_check_id(sensor);
+ if (ret < 0)
+ goto error_cleanup;
+
+ dev_info(dev, "ov2680 init correctly\n");
+
+ return 0;
+
+error_cleanup:
+ dev_err(dev, "ov2680 init fail: %d\n", ret);
+
+ media_entity_cleanup(&sensor->sd.entity);
+ v4l2_async_unregister_subdev(&sensor->sd);
+ v4l2_ctrl_handler_free(&sensor->ctrls.handler);
+
+lock_destroy:
+ mutex_destroy(&sensor->lock);
+
+ return ret;
+}
+
+static int ov2680_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct ov2680_dev *sensor = to_ov2680_dev(sd);
+
+ v4l2_async_unregister_subdev(&sensor->sd);
+ mutex_destroy(&sensor->lock);
+ media_entity_cleanup(&sensor->sd.entity);
+ v4l2_ctrl_handler_free(&sensor->ctrls.handler);
+
+ return 0;
+}
+
+static int __maybe_unused ov2680_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct ov2680_dev *sensor = to_ov2680_dev(sd);
+
+ if (sensor->is_streaming)
+ ov2680_stream_disable(sensor);
+
+ return 0;
+}
+
+static int __maybe_unused ov2680_resume(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct ov2680_dev *sensor = to_ov2680_dev(sd);
+ int ret;
+
+ if (sensor->is_streaming) {
+ ret = ov2680_stream_enable(sensor);
+ if (ret < 0)
+ goto stream_disable;
+ }
+
+ return 0;
+
+stream_disable:
+ ov2680_stream_disable(sensor);
+ sensor->is_streaming = false;
+
+ return ret;
+}
+
+static const struct dev_pm_ops ov2680_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(ov2680_suspend, ov2680_resume)
+};
+
+static const struct of_device_id ov2680_dt_ids[] = {
+ { .compatible = "ovti,ov2680" },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, ov2680_dt_ids);
+
+static struct i2c_driver ov2680_i2c_driver = {
+ .driver = {
+ .name = "ov2680",
+ .pm = &ov2680_pm_ops,
+ .of_match_table = of_match_ptr(ov2680_dt_ids),
+ },
+ .probe_new = ov2680_probe,
+ .remove = ov2680_remove,
+};
+module_i2c_driver(ov2680_i2c_driver);
+
+MODULE_AUTHOR("Rui Miguel Silva <rui.silva@linaro.org>");
+MODULE_DESCRIPTION("OV2680 CMOS Image Sensor driver");
+MODULE_LICENSE("GPL v2");
--
2.16.2
\
 
 \ /
  Last update: 2018-03-13 12:35    [W:0.100 / U:1.636 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site