https://github.com/torvalds/linux
Tip revision: 3d7cb6b04c3f3115719235cc6866b10326de34cd authored by Linus Torvalds on 31 July 2022, 21:03:01 UTC
Linux 5.19
Linux 5.19
Tip revision: 3d7cb6b
video-i2c.c
// SPDX-License-Identifier: GPL-2.0
/*
* video-i2c.c - Support for I2C transport video devices
*
* Copyright (C) 2018 Matt Ranostay <matt.ranostay@konsulko.com>
*
* Supported:
* - Panasonic AMG88xx Grid-Eye Sensors
* - Melexis MLX90640 Thermal Cameras
*/
#include <linux/bits.h>
#include <linux/delay.h>
#include <linux/freezer.h>
#include <linux/hwmon.h>
#include <linux/kthread.h>
#include <linux/i2c.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of_device.h>
#include <linux/pm_runtime.h>
#include <linux/nvmem-provider.h>
#include <linux/regmap.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
#include <media/v4l2-device.h>
#include <media/v4l2-event.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-ioctl.h>
#include <media/videobuf2-v4l2.h>
#include <media/videobuf2-vmalloc.h>
#define VIDEO_I2C_DRIVER "video-i2c"
/* Power control register */
#define AMG88XX_REG_PCTL 0x00
#define AMG88XX_PCTL_NORMAL 0x00
#define AMG88XX_PCTL_SLEEP 0x10
/* Reset register */
#define AMG88XX_REG_RST 0x01
#define AMG88XX_RST_FLAG 0x30
#define AMG88XX_RST_INIT 0x3f
/* Frame rate register */
#define AMG88XX_REG_FPSC 0x02
#define AMG88XX_FPSC_1FPS BIT(0)
/* Thermistor register */
#define AMG88XX_REG_TTHL 0x0e
/* Temperature register */
#define AMG88XX_REG_T01L 0x80
/* RAM */
#define MLX90640_RAM_START_ADDR 0x0400
/* EEPROM */
#define MLX90640_EEPROM_START_ADDR 0x2400
/* Control register */
#define MLX90640_REG_CTL1 0x800d
#define MLX90640_REG_CTL1_MASK GENMASK(9, 7)
#define MLX90640_REG_CTL1_MASK_SHIFT 7
struct video_i2c_chip;
struct video_i2c_buffer {
struct vb2_v4l2_buffer vb;
struct list_head list;
};
struct video_i2c_data {
struct regmap *regmap;
const struct video_i2c_chip *chip;
struct mutex lock;
spinlock_t slock;
unsigned int sequence;
struct mutex queue_lock;
struct v4l2_device v4l2_dev;
struct video_device vdev;
struct vb2_queue vb_vidq;
struct task_struct *kthread_vid_cap;
struct list_head vid_cap_active;
struct v4l2_fract frame_interval;
};
static const struct v4l2_fmtdesc amg88xx_format = {
.pixelformat = V4L2_PIX_FMT_Y12,
};
static const struct v4l2_frmsize_discrete amg88xx_size = {
.width = 8,
.height = 8,
};
static const struct v4l2_fmtdesc mlx90640_format = {
.pixelformat = V4L2_PIX_FMT_Y16_BE,
};
static const struct v4l2_frmsize_discrete mlx90640_size = {
.width = 32,
.height = 26, /* 24 lines of pixel data + 2 lines of processing data */
};
static const struct regmap_config amg88xx_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = 0xff
};
static const struct regmap_config mlx90640_regmap_config = {
.reg_bits = 16,
.val_bits = 16,
};
struct video_i2c_chip {
/* video dimensions */
const struct v4l2_fmtdesc *format;
const struct v4l2_frmsize_discrete *size;
/* available frame intervals */
const struct v4l2_fract *frame_intervals;
unsigned int num_frame_intervals;
/* pixel buffer size */
unsigned int buffer_size;
/* pixel size in bits */
unsigned int bpp;
const struct regmap_config *regmap_config;
struct nvmem_config *nvmem_config;
/* setup function */
int (*setup)(struct video_i2c_data *data);
/* xfer function */
int (*xfer)(struct video_i2c_data *data, char *buf);
/* power control function */
int (*set_power)(struct video_i2c_data *data, bool on);
/* hwmon init function */
int (*hwmon_init)(struct video_i2c_data *data);
};
static int mlx90640_nvram_read(void *priv, unsigned int offset, void *val,
size_t bytes)
{
struct video_i2c_data *data = priv;
return regmap_bulk_read(data->regmap, MLX90640_EEPROM_START_ADDR + offset, val, bytes);
}
static struct nvmem_config mlx90640_nvram_config = {
.name = "mlx90640_nvram",
.word_size = 2,
.stride = 1,
.size = 1664,
.reg_read = mlx90640_nvram_read,
};
static int amg88xx_xfer(struct video_i2c_data *data, char *buf)
{
return regmap_bulk_read(data->regmap, AMG88XX_REG_T01L, buf,
data->chip->buffer_size);
}
static int mlx90640_xfer(struct video_i2c_data *data, char *buf)
{
return regmap_bulk_read(data->regmap, MLX90640_RAM_START_ADDR, buf,
data->chip->buffer_size);
}
static int amg88xx_setup(struct video_i2c_data *data)
{
unsigned int mask = AMG88XX_FPSC_1FPS;
unsigned int val;
if (data->frame_interval.numerator == data->frame_interval.denominator)
val = mask;
else
val = 0;
return regmap_update_bits(data->regmap, AMG88XX_REG_FPSC, mask, val);
}
static int mlx90640_setup(struct video_i2c_data *data)
{
unsigned int n, idx;
for (n = 0; n < data->chip->num_frame_intervals - 1; n++) {
if (V4L2_FRACT_COMPARE(data->frame_interval, ==,
data->chip->frame_intervals[n]))
break;
}
idx = data->chip->num_frame_intervals - n - 1;
return regmap_update_bits(data->regmap, MLX90640_REG_CTL1,
MLX90640_REG_CTL1_MASK,
idx << MLX90640_REG_CTL1_MASK_SHIFT);
}
static int amg88xx_set_power_on(struct video_i2c_data *data)
{
int ret;
ret = regmap_write(data->regmap, AMG88XX_REG_PCTL, AMG88XX_PCTL_NORMAL);
if (ret)
return ret;
msleep(50);
ret = regmap_write(data->regmap, AMG88XX_REG_RST, AMG88XX_RST_INIT);
if (ret)
return ret;
usleep_range(2000, 3000);
ret = regmap_write(data->regmap, AMG88XX_REG_RST, AMG88XX_RST_FLAG);
if (ret)
return ret;
/*
* Wait two frames before reading thermistor and temperature registers
*/
msleep(200);
return 0;
}
static int amg88xx_set_power_off(struct video_i2c_data *data)
{
int ret;
ret = regmap_write(data->regmap, AMG88XX_REG_PCTL, AMG88XX_PCTL_SLEEP);
if (ret)
return ret;
/*
* Wait for a while to avoid resuming normal mode immediately after
* entering sleep mode, otherwise the device occasionally goes wrong
* (thermistor and temperature registers are not updated at all)
*/
msleep(100);
return 0;
}
static int amg88xx_set_power(struct video_i2c_data *data, bool on)
{
if (on)
return amg88xx_set_power_on(data);
return amg88xx_set_power_off(data);
}
#if IS_REACHABLE(CONFIG_HWMON)
static const u32 amg88xx_temp_config[] = {
HWMON_T_INPUT,
0
};
static const struct hwmon_channel_info amg88xx_temp = {
.type = hwmon_temp,
.config = amg88xx_temp_config,
};
static const struct hwmon_channel_info *amg88xx_info[] = {
&amg88xx_temp,
NULL
};
static umode_t amg88xx_is_visible(const void *drvdata,
enum hwmon_sensor_types type,
u32 attr, int channel)
{
return 0444;
}
static int amg88xx_read(struct device *dev, enum hwmon_sensor_types type,
u32 attr, int channel, long *val)
{
struct video_i2c_data *data = dev_get_drvdata(dev);
__le16 buf;
int tmp;
tmp = pm_runtime_resume_and_get(regmap_get_device(data->regmap));
if (tmp < 0)
return tmp;
tmp = regmap_bulk_read(data->regmap, AMG88XX_REG_TTHL, &buf, 2);
pm_runtime_mark_last_busy(regmap_get_device(data->regmap));
pm_runtime_put_autosuspend(regmap_get_device(data->regmap));
if (tmp)
return tmp;
tmp = le16_to_cpu(buf);
/*
* Check for sign bit, this isn't a two's complement value but an
* absolute temperature that needs to be inverted in the case of being
* negative.
*/
if (tmp & BIT(11))
tmp = -(tmp & 0x7ff);
*val = (tmp * 625) / 10;
return 0;
}
static const struct hwmon_ops amg88xx_hwmon_ops = {
.is_visible = amg88xx_is_visible,
.read = amg88xx_read,
};
static const struct hwmon_chip_info amg88xx_chip_info = {
.ops = &amg88xx_hwmon_ops,
.info = amg88xx_info,
};
static int amg88xx_hwmon_init(struct video_i2c_data *data)
{
struct device *dev = regmap_get_device(data->regmap);
void *hwmon = devm_hwmon_device_register_with_info(dev, "amg88xx", data,
&amg88xx_chip_info, NULL);
return PTR_ERR_OR_ZERO(hwmon);
}
#else
#define amg88xx_hwmon_init NULL
#endif
enum {
AMG88XX,
MLX90640,
};
static const struct v4l2_fract amg88xx_frame_intervals[] = {
{ 1, 10 },
{ 1, 1 },
};
static const struct v4l2_fract mlx90640_frame_intervals[] = {
{ 1, 64 },
{ 1, 32 },
{ 1, 16 },
{ 1, 8 },
{ 1, 4 },
{ 1, 2 },
{ 1, 1 },
{ 2, 1 },
};
static const struct video_i2c_chip video_i2c_chip[] = {
[AMG88XX] = {
.size = &amg88xx_size,
.format = &amg88xx_format,
.frame_intervals = amg88xx_frame_intervals,
.num_frame_intervals = ARRAY_SIZE(amg88xx_frame_intervals),
.buffer_size = 128,
.bpp = 16,
.regmap_config = &amg88xx_regmap_config,
.setup = &amg88xx_setup,
.xfer = &amg88xx_xfer,
.set_power = amg88xx_set_power,
.hwmon_init = amg88xx_hwmon_init,
},
[MLX90640] = {
.size = &mlx90640_size,
.format = &mlx90640_format,
.frame_intervals = mlx90640_frame_intervals,
.num_frame_intervals = ARRAY_SIZE(mlx90640_frame_intervals),
.buffer_size = 1664,
.bpp = 16,
.regmap_config = &mlx90640_regmap_config,
.nvmem_config = &mlx90640_nvram_config,
.setup = mlx90640_setup,
.xfer = mlx90640_xfer,
},
};
static const struct v4l2_file_operations video_i2c_fops = {
.owner = THIS_MODULE,
.open = v4l2_fh_open,
.release = vb2_fop_release,
.poll = vb2_fop_poll,
.read = vb2_fop_read,
.mmap = vb2_fop_mmap,
.unlocked_ioctl = video_ioctl2,
};
static int queue_setup(struct vb2_queue *vq,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], struct device *alloc_devs[])
{
struct video_i2c_data *data = vb2_get_drv_priv(vq);
unsigned int size = data->chip->buffer_size;
if (vq->num_buffers + *nbuffers < 2)
*nbuffers = 2;
if (*nplanes)
return sizes[0] < size ? -EINVAL : 0;
*nplanes = 1;
sizes[0] = size;
return 0;
}
static int buffer_prepare(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct video_i2c_data *data = vb2_get_drv_priv(vb->vb2_queue);
unsigned int size = data->chip->buffer_size;
if (vb2_plane_size(vb, 0) < size)
return -EINVAL;
vbuf->field = V4L2_FIELD_NONE;
vb2_set_plane_payload(vb, 0, size);
return 0;
}
static void buffer_queue(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct video_i2c_data *data = vb2_get_drv_priv(vb->vb2_queue);
struct video_i2c_buffer *buf =
container_of(vbuf, struct video_i2c_buffer, vb);
spin_lock(&data->slock);
list_add_tail(&buf->list, &data->vid_cap_active);
spin_unlock(&data->slock);
}
static int video_i2c_thread_vid_cap(void *priv)
{
struct video_i2c_data *data = priv;
u32 delay = mult_frac(1000000UL, data->frame_interval.numerator,
data->frame_interval.denominator);
s64 end_us = ktime_to_us(ktime_get());
set_freezable();
do {
struct video_i2c_buffer *vid_cap_buf = NULL;
s64 current_us;
int schedule_delay;
try_to_freeze();
spin_lock(&data->slock);
if (!list_empty(&data->vid_cap_active)) {
vid_cap_buf = list_last_entry(&data->vid_cap_active,
struct video_i2c_buffer, list);
list_del(&vid_cap_buf->list);
}
spin_unlock(&data->slock);
if (vid_cap_buf) {
struct vb2_buffer *vb2_buf = &vid_cap_buf->vb.vb2_buf;
void *vbuf = vb2_plane_vaddr(vb2_buf, 0);
int ret;
ret = data->chip->xfer(data, vbuf);
vb2_buf->timestamp = ktime_get_ns();
vid_cap_buf->vb.sequence = data->sequence++;
vb2_buffer_done(vb2_buf, ret ?
VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
}
end_us += delay;
current_us = ktime_to_us(ktime_get());
if (current_us < end_us) {
schedule_delay = end_us - current_us;
usleep_range(schedule_delay * 3 / 4, schedule_delay);
} else {
end_us = current_us;
}
} while (!kthread_should_stop());
return 0;
}
static void video_i2c_del_list(struct vb2_queue *vq, enum vb2_buffer_state state)
{
struct video_i2c_data *data = vb2_get_drv_priv(vq);
struct video_i2c_buffer *buf, *tmp;
spin_lock(&data->slock);
list_for_each_entry_safe(buf, tmp, &data->vid_cap_active, list) {
list_del(&buf->list);
vb2_buffer_done(&buf->vb.vb2_buf, state);
}
spin_unlock(&data->slock);
}
static int start_streaming(struct vb2_queue *vq, unsigned int count)
{
struct video_i2c_data *data = vb2_get_drv_priv(vq);
struct device *dev = regmap_get_device(data->regmap);
int ret;
if (data->kthread_vid_cap)
return 0;
ret = pm_runtime_resume_and_get(dev);
if (ret < 0)
goto error_del_list;
ret = data->chip->setup(data);
if (ret)
goto error_rpm_put;
data->sequence = 0;
data->kthread_vid_cap = kthread_run(video_i2c_thread_vid_cap, data,
"%s-vid-cap", data->v4l2_dev.name);
ret = PTR_ERR_OR_ZERO(data->kthread_vid_cap);
if (!ret)
return 0;
error_rpm_put:
pm_runtime_mark_last_busy(dev);
pm_runtime_put_autosuspend(dev);
error_del_list:
video_i2c_del_list(vq, VB2_BUF_STATE_QUEUED);
return ret;
}
static void stop_streaming(struct vb2_queue *vq)
{
struct video_i2c_data *data = vb2_get_drv_priv(vq);
if (data->kthread_vid_cap == NULL)
return;
kthread_stop(data->kthread_vid_cap);
data->kthread_vid_cap = NULL;
pm_runtime_mark_last_busy(regmap_get_device(data->regmap));
pm_runtime_put_autosuspend(regmap_get_device(data->regmap));
video_i2c_del_list(vq, VB2_BUF_STATE_ERROR);
}
static const struct vb2_ops video_i2c_video_qops = {
.queue_setup = queue_setup,
.buf_prepare = buffer_prepare,
.buf_queue = buffer_queue,
.start_streaming = start_streaming,
.stop_streaming = stop_streaming,
.wait_prepare = vb2_ops_wait_prepare,
.wait_finish = vb2_ops_wait_finish,
};
static int video_i2c_querycap(struct file *file, void *priv,
struct v4l2_capability *vcap)
{
struct video_i2c_data *data = video_drvdata(file);
struct device *dev = regmap_get_device(data->regmap);
struct i2c_client *client = to_i2c_client(dev);
strscpy(vcap->driver, data->v4l2_dev.name, sizeof(vcap->driver));
strscpy(vcap->card, data->vdev.name, sizeof(vcap->card));
sprintf(vcap->bus_info, "I2C:%d-%d", client->adapter->nr, client->addr);
return 0;
}
static int video_i2c_g_input(struct file *file, void *fh, unsigned int *inp)
{
*inp = 0;
return 0;
}
static int video_i2c_s_input(struct file *file, void *fh, unsigned int inp)
{
return (inp > 0) ? -EINVAL : 0;
}
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");
}
}
if (data->chip->nvmem_config) {
struct nvmem_config *config = data->chip->nvmem_config;
struct nvmem_device *device;
config->priv = data;
config->dev = &client->dev;
device = devm_nvmem_register(&client->dev, config);
if (IS_ERR(device)) {
dev_warn(&client->dev,
"failed to register nvmem device\n");
}
}
ret = video_register_device(&data->vdev, VFL_TYPE_VIDEO, -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 },
{ "mlx90640", MLX90640 },
{}
};
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] },
{ .compatible = "melexis,mlx90640", .data = &video_i2c_chip[MLX90640] },
{}
};
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");