![Matt Ranostay](/assets/img/avatar_default.png)
Not all future supported video chips will always have power management support, and so it is important to check before calling set_power() is defined. Signed-off-by: Matt Ranostay <matt.ranostay@konsulko.com> Reviewed-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
864 lines
21 KiB
C
864 lines
21 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* video-i2c.c - Support for I2C transport video devices
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*
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* Copyright (C) 2018 Matt Ranostay <matt.ranostay@konsulko.com>
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*
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* Supported:
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* - Panasonic AMG88xx Grid-Eye Sensors
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*/
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#include <linux/delay.h>
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#include <linux/freezer.h>
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#include <linux/hwmon.h>
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#include <linux/kthread.h>
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#include <linux/i2c.h>
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#include <linux/list.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/of_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/regmap.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/videodev2.h>
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#include <media/v4l2-common.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-event.h>
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#include <media/v4l2-fh.h>
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#include <media/v4l2-ioctl.h>
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#include <media/videobuf2-v4l2.h>
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#include <media/videobuf2-vmalloc.h>
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#define VIDEO_I2C_DRIVER "video-i2c"
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struct video_i2c_chip;
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struct video_i2c_buffer {
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struct vb2_v4l2_buffer vb;
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struct list_head list;
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};
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struct video_i2c_data {
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struct regmap *regmap;
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const struct video_i2c_chip *chip;
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struct mutex lock;
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spinlock_t slock;
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unsigned int sequence;
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struct mutex queue_lock;
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struct v4l2_device v4l2_dev;
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struct video_device vdev;
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struct vb2_queue vb_vidq;
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struct task_struct *kthread_vid_cap;
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struct list_head vid_cap_active;
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struct v4l2_fract frame_interval;
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};
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static const struct v4l2_fmtdesc amg88xx_format = {
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.pixelformat = V4L2_PIX_FMT_Y12,
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};
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static const struct v4l2_frmsize_discrete amg88xx_size = {
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.width = 8,
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.height = 8,
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};
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static const struct regmap_config amg88xx_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = 0xff
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};
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struct video_i2c_chip {
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/* video dimensions */
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const struct v4l2_fmtdesc *format;
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const struct v4l2_frmsize_discrete *size;
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/* available frame intervals */
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const struct v4l2_fract *frame_intervals;
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unsigned int num_frame_intervals;
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/* pixel buffer size */
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unsigned int buffer_size;
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/* pixel size in bits */
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unsigned int bpp;
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const struct regmap_config *regmap_config;
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/* setup function */
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int (*setup)(struct video_i2c_data *data);
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/* xfer function */
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int (*xfer)(struct video_i2c_data *data, char *buf);
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/* power control function */
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int (*set_power)(struct video_i2c_data *data, bool on);
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/* hwmon init function */
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int (*hwmon_init)(struct video_i2c_data *data);
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};
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/* Power control register */
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#define AMG88XX_REG_PCTL 0x00
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#define AMG88XX_PCTL_NORMAL 0x00
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#define AMG88XX_PCTL_SLEEP 0x10
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/* Reset register */
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#define AMG88XX_REG_RST 0x01
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#define AMG88XX_RST_FLAG 0x30
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#define AMG88XX_RST_INIT 0x3f
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/* Frame rate register */
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#define AMG88XX_REG_FPSC 0x02
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#define AMG88XX_FPSC_1FPS BIT(0)
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/* Thermistor register */
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#define AMG88XX_REG_TTHL 0x0e
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/* Temperature register */
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#define AMG88XX_REG_T01L 0x80
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static int amg88xx_xfer(struct video_i2c_data *data, char *buf)
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{
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return regmap_bulk_read(data->regmap, AMG88XX_REG_T01L, buf,
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data->chip->buffer_size);
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}
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static int amg88xx_setup(struct video_i2c_data *data)
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{
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unsigned int mask = AMG88XX_FPSC_1FPS;
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unsigned int val;
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if (data->frame_interval.numerator == data->frame_interval.denominator)
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val = mask;
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else
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val = 0;
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return regmap_update_bits(data->regmap, AMG88XX_REG_FPSC, mask, val);
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}
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static int amg88xx_set_power_on(struct video_i2c_data *data)
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{
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int ret;
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ret = regmap_write(data->regmap, AMG88XX_REG_PCTL, AMG88XX_PCTL_NORMAL);
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if (ret)
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return ret;
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msleep(50);
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ret = regmap_write(data->regmap, AMG88XX_REG_RST, AMG88XX_RST_INIT);
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if (ret)
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return ret;
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usleep_range(2000, 3000);
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ret = regmap_write(data->regmap, AMG88XX_REG_RST, AMG88XX_RST_FLAG);
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if (ret)
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return ret;
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/*
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* Wait two frames before reading thermistor and temperature registers
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*/
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msleep(200);
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return 0;
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}
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static int amg88xx_set_power_off(struct video_i2c_data *data)
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{
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int ret;
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ret = regmap_write(data->regmap, AMG88XX_REG_PCTL, AMG88XX_PCTL_SLEEP);
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if (ret)
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return ret;
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/*
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* Wait for a while to avoid resuming normal mode immediately after
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* entering sleep mode, otherwise the device occasionally goes wrong
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* (thermistor and temperature registers are not updated at all)
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*/
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msleep(100);
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return 0;
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}
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static int amg88xx_set_power(struct video_i2c_data *data, bool on)
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{
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if (on)
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return amg88xx_set_power_on(data);
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return amg88xx_set_power_off(data);
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}
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#if IS_ENABLED(CONFIG_HWMON)
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static const u32 amg88xx_temp_config[] = {
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HWMON_T_INPUT,
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0
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};
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static const struct hwmon_channel_info amg88xx_temp = {
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.type = hwmon_temp,
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.config = amg88xx_temp_config,
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};
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static const struct hwmon_channel_info *amg88xx_info[] = {
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&amg88xx_temp,
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NULL
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};
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static umode_t amg88xx_is_visible(const void *drvdata,
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enum hwmon_sensor_types type,
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u32 attr, int channel)
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{
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return 0444;
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}
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static int amg88xx_read(struct device *dev, enum hwmon_sensor_types type,
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u32 attr, int channel, long *val)
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{
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struct video_i2c_data *data = dev_get_drvdata(dev);
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__le16 buf;
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int tmp;
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tmp = pm_runtime_get_sync(regmap_get_device(data->regmap));
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if (tmp < 0) {
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pm_runtime_put_noidle(regmap_get_device(data->regmap));
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return tmp;
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}
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tmp = regmap_bulk_read(data->regmap, AMG88XX_REG_TTHL, &buf, 2);
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pm_runtime_mark_last_busy(regmap_get_device(data->regmap));
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pm_runtime_put_autosuspend(regmap_get_device(data->regmap));
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if (tmp)
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return tmp;
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tmp = le16_to_cpu(buf);
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/*
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* Check for sign bit, this isn't a two's complement value but an
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* absolute temperature that needs to be inverted in the case of being
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* negative.
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*/
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if (tmp & BIT(11))
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tmp = -(tmp & 0x7ff);
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*val = (tmp * 625) / 10;
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return 0;
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}
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static const struct hwmon_ops amg88xx_hwmon_ops = {
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.is_visible = amg88xx_is_visible,
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.read = amg88xx_read,
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};
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static const struct hwmon_chip_info amg88xx_chip_info = {
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.ops = &amg88xx_hwmon_ops,
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.info = amg88xx_info,
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};
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static int amg88xx_hwmon_init(struct video_i2c_data *data)
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{
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struct device *dev = regmap_get_device(data->regmap);
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void *hwmon = devm_hwmon_device_register_with_info(dev, "amg88xx", data,
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&amg88xx_chip_info, NULL);
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return PTR_ERR_OR_ZERO(hwmon);
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}
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#else
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#define amg88xx_hwmon_init NULL
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#endif
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#define AMG88XX 0
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static const struct v4l2_fract amg88xx_frame_intervals[] = {
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{ 1, 10 },
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{ 1, 1 },
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};
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static const struct video_i2c_chip video_i2c_chip[] = {
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[AMG88XX] = {
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.size = &amg88xx_size,
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.format = &amg88xx_format,
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.frame_intervals = amg88xx_frame_intervals,
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.num_frame_intervals = ARRAY_SIZE(amg88xx_frame_intervals),
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.buffer_size = 128,
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.bpp = 16,
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.regmap_config = &amg88xx_regmap_config,
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.setup = &amg88xx_setup,
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.xfer = &amg88xx_xfer,
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.set_power = amg88xx_set_power,
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.hwmon_init = amg88xx_hwmon_init,
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},
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};
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static const struct v4l2_file_operations video_i2c_fops = {
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.owner = THIS_MODULE,
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.open = v4l2_fh_open,
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.release = vb2_fop_release,
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.poll = vb2_fop_poll,
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.read = vb2_fop_read,
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.mmap = vb2_fop_mmap,
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.unlocked_ioctl = video_ioctl2,
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};
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static int queue_setup(struct vb2_queue *vq,
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unsigned int *nbuffers, unsigned int *nplanes,
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unsigned int sizes[], struct device *alloc_devs[])
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{
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struct video_i2c_data *data = vb2_get_drv_priv(vq);
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unsigned int size = data->chip->buffer_size;
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if (vq->num_buffers + *nbuffers < 2)
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*nbuffers = 2;
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if (*nplanes)
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return sizes[0] < size ? -EINVAL : 0;
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*nplanes = 1;
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sizes[0] = size;
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return 0;
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}
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static int buffer_prepare(struct vb2_buffer *vb)
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{
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struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
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struct video_i2c_data *data = vb2_get_drv_priv(vb->vb2_queue);
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unsigned int size = data->chip->buffer_size;
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if (vb2_plane_size(vb, 0) < size)
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return -EINVAL;
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vbuf->field = V4L2_FIELD_NONE;
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vb2_set_plane_payload(vb, 0, size);
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return 0;
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}
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static void buffer_queue(struct vb2_buffer *vb)
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{
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struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
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struct video_i2c_data *data = vb2_get_drv_priv(vb->vb2_queue);
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struct video_i2c_buffer *buf =
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container_of(vbuf, struct video_i2c_buffer, vb);
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spin_lock(&data->slock);
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list_add_tail(&buf->list, &data->vid_cap_active);
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spin_unlock(&data->slock);
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}
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static int video_i2c_thread_vid_cap(void *priv)
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{
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struct video_i2c_data *data = priv;
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unsigned int delay = mult_frac(HZ, data->frame_interval.numerator,
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data->frame_interval.denominator);
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set_freezable();
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do {
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unsigned long start_jiffies = jiffies;
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struct video_i2c_buffer *vid_cap_buf = NULL;
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int schedule_delay;
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try_to_freeze();
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spin_lock(&data->slock);
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if (!list_empty(&data->vid_cap_active)) {
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vid_cap_buf = list_last_entry(&data->vid_cap_active,
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struct video_i2c_buffer, list);
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list_del(&vid_cap_buf->list);
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}
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spin_unlock(&data->slock);
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if (vid_cap_buf) {
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struct vb2_buffer *vb2_buf = &vid_cap_buf->vb.vb2_buf;
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void *vbuf = vb2_plane_vaddr(vb2_buf, 0);
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int ret;
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ret = data->chip->xfer(data, vbuf);
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vb2_buf->timestamp = ktime_get_ns();
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vid_cap_buf->vb.sequence = data->sequence++;
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vb2_buffer_done(vb2_buf, ret ?
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VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
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}
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schedule_delay = delay - (jiffies - start_jiffies);
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if (time_after(jiffies, start_jiffies + delay))
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schedule_delay = delay;
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schedule_timeout_interruptible(schedule_delay);
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} while (!kthread_should_stop());
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return 0;
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}
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static void video_i2c_del_list(struct vb2_queue *vq, enum vb2_buffer_state state)
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{
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struct video_i2c_data *data = vb2_get_drv_priv(vq);
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struct video_i2c_buffer *buf, *tmp;
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spin_lock(&data->slock);
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list_for_each_entry_safe(buf, tmp, &data->vid_cap_active, list) {
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list_del(&buf->list);
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vb2_buffer_done(&buf->vb.vb2_buf, state);
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}
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spin_unlock(&data->slock);
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}
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static int start_streaming(struct vb2_queue *vq, unsigned int count)
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{
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struct video_i2c_data *data = vb2_get_drv_priv(vq);
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struct device *dev = regmap_get_device(data->regmap);
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int ret;
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if (data->kthread_vid_cap)
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return 0;
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ret = pm_runtime_get_sync(dev);
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if (ret < 0) {
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pm_runtime_put_noidle(dev);
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goto error_del_list;
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}
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ret = data->chip->setup(data);
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if (ret)
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goto error_rpm_put;
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data->sequence = 0;
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data->kthread_vid_cap = kthread_run(video_i2c_thread_vid_cap, data,
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"%s-vid-cap", data->v4l2_dev.name);
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ret = PTR_ERR_OR_ZERO(data->kthread_vid_cap);
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if (!ret)
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return 0;
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error_rpm_put:
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pm_runtime_mark_last_busy(dev);
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pm_runtime_put_autosuspend(dev);
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error_del_list:
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video_i2c_del_list(vq, VB2_BUF_STATE_QUEUED);
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return ret;
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}
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static void stop_streaming(struct vb2_queue *vq)
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{
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struct video_i2c_data *data = vb2_get_drv_priv(vq);
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if (data->kthread_vid_cap == NULL)
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return;
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kthread_stop(data->kthread_vid_cap);
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data->kthread_vid_cap = NULL;
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pm_runtime_mark_last_busy(regmap_get_device(data->regmap));
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pm_runtime_put_autosuspend(regmap_get_device(data->regmap));
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video_i2c_del_list(vq, VB2_BUF_STATE_ERROR);
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}
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static const struct vb2_ops video_i2c_video_qops = {
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.queue_setup = queue_setup,
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.buf_prepare = buffer_prepare,
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.buf_queue = buffer_queue,
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.start_streaming = start_streaming,
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.stop_streaming = stop_streaming,
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.wait_prepare = vb2_ops_wait_prepare,
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.wait_finish = vb2_ops_wait_finish,
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};
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static int video_i2c_querycap(struct file *file, void *priv,
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struct v4l2_capability *vcap)
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{
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struct video_i2c_data *data = video_drvdata(file);
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struct device *dev = regmap_get_device(data->regmap);
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struct i2c_client *client = to_i2c_client(dev);
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strscpy(vcap->driver, data->v4l2_dev.name, sizeof(vcap->driver));
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strscpy(vcap->card, data->vdev.name, sizeof(vcap->card));
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sprintf(vcap->bus_info, "I2C:%d-%d", client->adapter->nr, client->addr);
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return 0;
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}
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static int video_i2c_g_input(struct file *file, void *fh, unsigned int *inp)
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{
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*inp = 0;
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return 0;
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}
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static int video_i2c_s_input(struct file *file, void *fh, unsigned int inp)
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{
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return (inp > 0) ? -EINVAL : 0;
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}
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static int video_i2c_enum_input(struct file *file, void *fh,
|
|
struct v4l2_input *vin)
|
|
{
|
|
if (vin->index > 0)
|
|
return -EINVAL;
|
|
|
|
strscpy(vin->name, "Camera", sizeof(vin->name));
|
|
|
|
vin->type = V4L2_INPUT_TYPE_CAMERA;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int video_i2c_enum_fmt_vid_cap(struct file *file, void *fh,
|
|
struct v4l2_fmtdesc *fmt)
|
|
{
|
|
struct video_i2c_data *data = video_drvdata(file);
|
|
enum v4l2_buf_type type = fmt->type;
|
|
|
|
if (fmt->index > 0)
|
|
return -EINVAL;
|
|
|
|
*fmt = *data->chip->format;
|
|
fmt->type = type;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int video_i2c_enum_framesizes(struct file *file, void *fh,
|
|
struct v4l2_frmsizeenum *fsize)
|
|
{
|
|
const struct video_i2c_data *data = video_drvdata(file);
|
|
const struct v4l2_frmsize_discrete *size = data->chip->size;
|
|
|
|
/* currently only one frame size is allowed */
|
|
if (fsize->index > 0)
|
|
return -EINVAL;
|
|
|
|
if (fsize->pixel_format != data->chip->format->pixelformat)
|
|
return -EINVAL;
|
|
|
|
fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
|
|
fsize->discrete.width = size->width;
|
|
fsize->discrete.height = size->height;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int video_i2c_enum_frameintervals(struct file *file, void *priv,
|
|
struct v4l2_frmivalenum *fe)
|
|
{
|
|
const struct video_i2c_data *data = video_drvdata(file);
|
|
const struct v4l2_frmsize_discrete *size = data->chip->size;
|
|
|
|
if (fe->index >= data->chip->num_frame_intervals)
|
|
return -EINVAL;
|
|
|
|
if (fe->width != size->width || fe->height != size->height)
|
|
return -EINVAL;
|
|
|
|
fe->type = V4L2_FRMIVAL_TYPE_DISCRETE;
|
|
fe->discrete = data->chip->frame_intervals[fe->index];
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int video_i2c_try_fmt_vid_cap(struct file *file, void *fh,
|
|
struct v4l2_format *fmt)
|
|
{
|
|
const struct video_i2c_data *data = video_drvdata(file);
|
|
const struct v4l2_frmsize_discrete *size = data->chip->size;
|
|
struct v4l2_pix_format *pix = &fmt->fmt.pix;
|
|
unsigned int bpp = data->chip->bpp / 8;
|
|
|
|
pix->width = size->width;
|
|
pix->height = size->height;
|
|
pix->pixelformat = data->chip->format->pixelformat;
|
|
pix->field = V4L2_FIELD_NONE;
|
|
pix->bytesperline = pix->width * bpp;
|
|
pix->sizeimage = pix->bytesperline * pix->height;
|
|
pix->colorspace = V4L2_COLORSPACE_RAW;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int video_i2c_s_fmt_vid_cap(struct file *file, void *fh,
|
|
struct v4l2_format *fmt)
|
|
{
|
|
struct video_i2c_data *data = video_drvdata(file);
|
|
|
|
if (vb2_is_busy(&data->vb_vidq))
|
|
return -EBUSY;
|
|
|
|
return video_i2c_try_fmt_vid_cap(file, fh, fmt);
|
|
}
|
|
|
|
static int video_i2c_g_parm(struct file *filp, void *priv,
|
|
struct v4l2_streamparm *parm)
|
|
{
|
|
struct video_i2c_data *data = video_drvdata(filp);
|
|
|
|
if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
|
|
return -EINVAL;
|
|
|
|
parm->parm.capture.readbuffers = 1;
|
|
parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
|
|
parm->parm.capture.timeperframe = data->frame_interval;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int video_i2c_s_parm(struct file *filp, void *priv,
|
|
struct v4l2_streamparm *parm)
|
|
{
|
|
struct video_i2c_data *data = video_drvdata(filp);
|
|
int i;
|
|
|
|
for (i = 0; i < data->chip->num_frame_intervals - 1; i++) {
|
|
if (V4L2_FRACT_COMPARE(parm->parm.capture.timeperframe, <=,
|
|
data->chip->frame_intervals[i]))
|
|
break;
|
|
}
|
|
data->frame_interval = data->chip->frame_intervals[i];
|
|
|
|
return video_i2c_g_parm(filp, priv, parm);
|
|
}
|
|
|
|
static const struct v4l2_ioctl_ops video_i2c_ioctl_ops = {
|
|
.vidioc_querycap = video_i2c_querycap,
|
|
.vidioc_g_input = video_i2c_g_input,
|
|
.vidioc_s_input = video_i2c_s_input,
|
|
.vidioc_enum_input = video_i2c_enum_input,
|
|
.vidioc_enum_fmt_vid_cap = video_i2c_enum_fmt_vid_cap,
|
|
.vidioc_enum_framesizes = video_i2c_enum_framesizes,
|
|
.vidioc_enum_frameintervals = video_i2c_enum_frameintervals,
|
|
.vidioc_g_fmt_vid_cap = video_i2c_try_fmt_vid_cap,
|
|
.vidioc_s_fmt_vid_cap = video_i2c_s_fmt_vid_cap,
|
|
.vidioc_g_parm = video_i2c_g_parm,
|
|
.vidioc_s_parm = video_i2c_s_parm,
|
|
.vidioc_try_fmt_vid_cap = video_i2c_try_fmt_vid_cap,
|
|
.vidioc_reqbufs = vb2_ioctl_reqbufs,
|
|
.vidioc_create_bufs = vb2_ioctl_create_bufs,
|
|
.vidioc_prepare_buf = vb2_ioctl_prepare_buf,
|
|
.vidioc_querybuf = vb2_ioctl_querybuf,
|
|
.vidioc_qbuf = vb2_ioctl_qbuf,
|
|
.vidioc_dqbuf = vb2_ioctl_dqbuf,
|
|
.vidioc_streamon = vb2_ioctl_streamon,
|
|
.vidioc_streamoff = vb2_ioctl_streamoff,
|
|
};
|
|
|
|
static void video_i2c_release(struct video_device *vdev)
|
|
{
|
|
struct video_i2c_data *data = video_get_drvdata(vdev);
|
|
|
|
v4l2_device_unregister(&data->v4l2_dev);
|
|
mutex_destroy(&data->lock);
|
|
mutex_destroy(&data->queue_lock);
|
|
regmap_exit(data->regmap);
|
|
kfree(data);
|
|
}
|
|
|
|
static int video_i2c_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct video_i2c_data *data;
|
|
struct v4l2_device *v4l2_dev;
|
|
struct vb2_queue *queue;
|
|
int ret = -ENODEV;
|
|
|
|
data = kzalloc(sizeof(*data), GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
if (dev_fwnode(&client->dev))
|
|
data->chip = device_get_match_data(&client->dev);
|
|
else if (id)
|
|
data->chip = &video_i2c_chip[id->driver_data];
|
|
else
|
|
goto error_free_device;
|
|
|
|
data->regmap = regmap_init_i2c(client, data->chip->regmap_config);
|
|
if (IS_ERR(data->regmap)) {
|
|
ret = PTR_ERR(data->regmap);
|
|
goto error_free_device;
|
|
}
|
|
|
|
v4l2_dev = &data->v4l2_dev;
|
|
strscpy(v4l2_dev->name, VIDEO_I2C_DRIVER, sizeof(v4l2_dev->name));
|
|
|
|
ret = v4l2_device_register(&client->dev, v4l2_dev);
|
|
if (ret < 0)
|
|
goto error_regmap_exit;
|
|
|
|
mutex_init(&data->lock);
|
|
mutex_init(&data->queue_lock);
|
|
|
|
queue = &data->vb_vidq;
|
|
queue->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
|
|
queue->io_modes = VB2_DMABUF | VB2_MMAP | VB2_USERPTR | VB2_READ;
|
|
queue->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
|
|
queue->drv_priv = data;
|
|
queue->buf_struct_size = sizeof(struct video_i2c_buffer);
|
|
queue->min_buffers_needed = 1;
|
|
queue->ops = &video_i2c_video_qops;
|
|
queue->mem_ops = &vb2_vmalloc_memops;
|
|
|
|
ret = vb2_queue_init(queue);
|
|
if (ret < 0)
|
|
goto error_unregister_device;
|
|
|
|
data->vdev.queue = queue;
|
|
data->vdev.queue->lock = &data->queue_lock;
|
|
|
|
snprintf(data->vdev.name, sizeof(data->vdev.name),
|
|
"I2C %d-%d Transport Video",
|
|
client->adapter->nr, client->addr);
|
|
|
|
data->vdev.v4l2_dev = v4l2_dev;
|
|
data->vdev.fops = &video_i2c_fops;
|
|
data->vdev.lock = &data->lock;
|
|
data->vdev.ioctl_ops = &video_i2c_ioctl_ops;
|
|
data->vdev.release = video_i2c_release;
|
|
data->vdev.device_caps = V4L2_CAP_VIDEO_CAPTURE |
|
|
V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
|
|
|
|
spin_lock_init(&data->slock);
|
|
INIT_LIST_HEAD(&data->vid_cap_active);
|
|
|
|
data->frame_interval = data->chip->frame_intervals[0];
|
|
|
|
video_set_drvdata(&data->vdev, data);
|
|
i2c_set_clientdata(client, data);
|
|
|
|
if (data->chip->set_power) {
|
|
ret = data->chip->set_power(data, true);
|
|
if (ret)
|
|
goto error_unregister_device;
|
|
}
|
|
|
|
pm_runtime_get_noresume(&client->dev);
|
|
pm_runtime_set_active(&client->dev);
|
|
pm_runtime_enable(&client->dev);
|
|
pm_runtime_set_autosuspend_delay(&client->dev, 2000);
|
|
pm_runtime_use_autosuspend(&client->dev);
|
|
|
|
if (data->chip->hwmon_init) {
|
|
ret = data->chip->hwmon_init(data);
|
|
if (ret < 0) {
|
|
dev_warn(&client->dev,
|
|
"failed to register hwmon device\n");
|
|
}
|
|
}
|
|
|
|
ret = video_register_device(&data->vdev, VFL_TYPE_GRABBER, -1);
|
|
if (ret < 0)
|
|
goto error_pm_disable;
|
|
|
|
pm_runtime_mark_last_busy(&client->dev);
|
|
pm_runtime_put_autosuspend(&client->dev);
|
|
|
|
return 0;
|
|
|
|
error_pm_disable:
|
|
pm_runtime_disable(&client->dev);
|
|
pm_runtime_set_suspended(&client->dev);
|
|
pm_runtime_put_noidle(&client->dev);
|
|
|
|
if (data->chip->set_power)
|
|
data->chip->set_power(data, false);
|
|
|
|
error_unregister_device:
|
|
v4l2_device_unregister(v4l2_dev);
|
|
mutex_destroy(&data->lock);
|
|
mutex_destroy(&data->queue_lock);
|
|
|
|
error_regmap_exit:
|
|
regmap_exit(data->regmap);
|
|
|
|
error_free_device:
|
|
kfree(data);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int video_i2c_remove(struct i2c_client *client)
|
|
{
|
|
struct video_i2c_data *data = i2c_get_clientdata(client);
|
|
|
|
pm_runtime_get_sync(&client->dev);
|
|
pm_runtime_disable(&client->dev);
|
|
pm_runtime_set_suspended(&client->dev);
|
|
pm_runtime_put_noidle(&client->dev);
|
|
|
|
if (data->chip->set_power)
|
|
data->chip->set_power(data, false);
|
|
|
|
video_unregister_device(&data->vdev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
|
|
static int video_i2c_pm_runtime_suspend(struct device *dev)
|
|
{
|
|
struct video_i2c_data *data = i2c_get_clientdata(to_i2c_client(dev));
|
|
|
|
if (!data->chip->set_power)
|
|
return 0;
|
|
|
|
return data->chip->set_power(data, false);
|
|
}
|
|
|
|
static int video_i2c_pm_runtime_resume(struct device *dev)
|
|
{
|
|
struct video_i2c_data *data = i2c_get_clientdata(to_i2c_client(dev));
|
|
|
|
if (!data->chip->set_power)
|
|
return 0;
|
|
|
|
return data->chip->set_power(data, true);
|
|
}
|
|
|
|
#endif
|
|
|
|
static const struct dev_pm_ops video_i2c_pm_ops = {
|
|
SET_RUNTIME_PM_OPS(video_i2c_pm_runtime_suspend,
|
|
video_i2c_pm_runtime_resume, NULL)
|
|
};
|
|
|
|
static const struct i2c_device_id video_i2c_id_table[] = {
|
|
{ "amg88xx", AMG88XX },
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, video_i2c_id_table);
|
|
|
|
static const struct of_device_id video_i2c_of_match[] = {
|
|
{ .compatible = "panasonic,amg88xx", .data = &video_i2c_chip[AMG88XX] },
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(of, video_i2c_of_match);
|
|
|
|
static struct i2c_driver video_i2c_driver = {
|
|
.driver = {
|
|
.name = VIDEO_I2C_DRIVER,
|
|
.of_match_table = video_i2c_of_match,
|
|
.pm = &video_i2c_pm_ops,
|
|
},
|
|
.probe = video_i2c_probe,
|
|
.remove = video_i2c_remove,
|
|
.id_table = video_i2c_id_table,
|
|
};
|
|
|
|
module_i2c_driver(video_i2c_driver);
|
|
|
|
MODULE_AUTHOR("Matt Ranostay <matt.ranostay@konsulko.com>");
|
|
MODULE_DESCRIPTION("I2C transport video support");
|
|
MODULE_LICENSE("GPL v2");
|