#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of_device.h>
+#include <linux/regmap.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/videodev2.h>
};
struct video_i2c_data {
- struct i2c_client *client;
+ struct regmap *regmap;
const struct video_i2c_chip *chip;
struct mutex lock;
spinlock_t slock;
struct task_struct *kthread_vid_cap;
struct list_head vid_cap_active;
+
+ struct v4l2_fract frame_interval;
};
static const struct v4l2_fmtdesc amg88xx_format = {
.height = 8,
};
+static const struct regmap_config amg88xx_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = 0xff
+};
+
struct video_i2c_chip {
/* video dimensions */
const struct v4l2_fmtdesc *format;
const struct v4l2_frmsize_discrete *size;
- /* max frames per second */
- unsigned int max_fps;
+ /* 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;
+
+ /* setup function */
+ int (*setup)(struct video_i2c_data *data);
+
/* xfer function */
int (*xfer)(struct video_i2c_data *data, char *buf);
int (*hwmon_init)(struct video_i2c_data *data);
};
+/* 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
+
static int amg88xx_xfer(struct video_i2c_data *data, char *buf)
{
- struct i2c_client *client = data->client;
- struct i2c_msg msg[2];
- u8 reg = 0x80;
- int ret;
-
- msg[0].addr = client->addr;
- msg[0].flags = 0;
- msg[0].len = 1;
- msg[0].buf = (char *)®
+ return regmap_bulk_read(data->regmap, AMG88XX_REG_T01L, buf,
+ data->chip->buffer_size);
+}
- msg[1].addr = client->addr;
- msg[1].flags = I2C_M_RD;
- msg[1].len = data->chip->buffer_size;
- msg[1].buf = (char *)buf;
+static int amg88xx_setup(struct video_i2c_data *data)
+{
+ unsigned int mask = AMG88XX_FPSC_1FPS;
+ unsigned int val;
- ret = i2c_transfer(client->adapter, msg, 2);
+ if (data->frame_interval.numerator == data->frame_interval.denominator)
+ val = mask;
+ else
+ val = 0;
- return (ret == 2) ? 0 : -EIO;
+ return regmap_update_bits(data->regmap, AMG88XX_REG_FPSC, mask, val);
}
#if IS_ENABLED(CONFIG_HWMON)
u32 attr, int channel, long *val)
{
struct video_i2c_data *data = dev_get_drvdata(dev);
- struct i2c_client *client = data->client;
- int tmp = i2c_smbus_read_word_data(client, 0x0e);
+ __le16 buf;
+ int tmp;
- if (tmp < 0)
+ tmp = regmap_bulk_read(data->regmap, AMG88XX_REG_TTHL, &buf, 2);
+ 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
static int amg88xx_hwmon_init(struct video_i2c_data *data)
{
- void *hwmon = devm_hwmon_device_register_with_info(&data->client->dev,
- "amg88xx", data, &amg88xx_chip_info, NULL);
+ 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);
}
#define AMG88XX 0
+static const struct v4l2_fract amg88xx_frame_intervals[] = {
+ { 1, 10 },
+ { 1, 1 },
+};
+
static const struct video_i2c_chip video_i2c_chip[] = {
[AMG88XX] = {
.size = &amg88xx_size,
.format = &amg88xx_format,
- .max_fps = 10,
+ .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,
.hwmon_init = amg88xx_hwmon_init,
},
static int video_i2c_thread_vid_cap(void *priv)
{
struct video_i2c_data *data = priv;
- unsigned int delay = msecs_to_jiffies(1000 / data->chip->max_fps);
+ unsigned int delay = mult_frac(HZ, data->frame_interval.numerator,
+ data->frame_interval.denominator);
set_freezable();
static int start_streaming(struct vb2_queue *vq, unsigned int count)
{
struct video_i2c_data *data = vb2_get_drv_priv(vq);
+ int ret;
if (data->kthread_vid_cap)
return 0;
+ ret = data->chip->setup(data);
+ if (ret)
+ goto error_del_list;
+
data->sequence = 0;
data->kthread_vid_cap = kthread_run(video_i2c_thread_vid_cap, data,
"%s-vid-cap", data->v4l2_dev.name);
- if (!IS_ERR(data->kthread_vid_cap))
+ ret = PTR_ERR_OR_ZERO(data->kthread_vid_cap);
+ if (!ret)
return 0;
+error_del_list:
video_i2c_del_list(vq, VB2_BUF_STATE_QUEUED);
- return PTR_ERR(data->kthread_vid_cap);
+ return ret;
}
static void stop_streaming(struct vb2_queue *vq)
video_i2c_del_list(vq, VB2_BUF_STATE_ERROR);
}
-static struct vb2_ops video_i2c_video_qops = {
+static const struct vb2_ops video_i2c_video_qops = {
.queue_setup = queue_setup,
.buf_prepare = buffer_prepare,
.buf_queue = buffer_queue,
struct v4l2_capability *vcap)
{
struct video_i2c_data *data = video_drvdata(file);
- struct i2c_client *client = data->client;
+ 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));
const struct video_i2c_data *data = video_drvdata(file);
const struct v4l2_frmsize_discrete *size = data->chip->size;
- if (fe->index > 0)
+ 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.numerator = 1;
- fe->discrete.denominator = data->chip->max_fps;
+ fe->discrete = data->chip->frame_intervals[fe->index];
return 0;
}
parm->parm.capture.readbuffers = 1;
parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
- parm->parm.capture.timeperframe.numerator = 1;
- parm->parm.capture.timeperframe.denominator = data->chip->max_fps;
+ 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_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_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,
static void video_i2c_release(struct video_device *vdev)
{
- kfree(video_get_drvdata(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,
else
goto error_free_device;
- data->client = client;
+ 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_free_device;
+ goto error_regmap_exit;
mutex_init(&data->lock);
mutex_init(&data->queue_lock);
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);
mutex_destroy(&data->lock);
mutex_destroy(&data->queue_lock);
+error_regmap_exit:
+ regmap_exit(data->regmap);
+
error_free_device:
kfree(data);
struct video_i2c_data *data = i2c_get_clientdata(client);
video_unregister_device(&data->vdev);
- v4l2_device_unregister(&data->v4l2_dev);
-
- mutex_destroy(&data->lock);
- mutex_destroy(&data->queue_lock);
return 0;
}
projects / linux-2.6-block.git / blobdiff