forked from mirrors/linux
media: video-i2c: add video-i2c driver
There are several thermal sensors that only have a low-speed bus interface but output valid video data. This patchset enables support for the AMG88xx "Grid-Eye" sensor family. Signed-off-by: Matt Ranostay <matt.ranostay@konsulko.com> Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com> [hans.verkuil@cisco.com: split up int ret = ...->xfer(); line] Signed-off-by: Hans Verkuil <hansverk@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Matt Ranostay
Mauro Carvalho Chehab
parent
d203d1e10a
commit
5cebaac609
4 changed files with 584 additions and 0 deletions
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@ -14922,6 +14922,12 @@ L: linux-media@vger.kernel.org
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S: Maintained
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F: drivers/media/platform/video-mux.c
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VIDEO I2C POLLING DRIVER
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M: Matt Ranostay <matt.ranostay@konsulko.com>
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L: linux-media@vger.kernel.org
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S: Maintained
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F: drivers/media/i2c/video-i2c.c
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VIDEOBUF2 FRAMEWORK
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M: Pawel Osciak <pawel@osciak.com>
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M: Marek Szyprowski <m.szyprowski@samsung.com>
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@ -974,6 +974,19 @@ config VIDEO_M52790
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To compile this driver as a module, choose M here: the
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module will be called m52790.
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config VIDEO_I2C
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tristate "I2C transport video support"
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depends on VIDEO_V4L2 && I2C
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select VIDEOBUF2_VMALLOC
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---help---
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Enable the I2C transport video support which supports the
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following:
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* Panasonic AMG88xx Grid-Eye Sensors
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To compile this driver as a module, choose M here: the
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module will be called video-i2c
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endmenu
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menu "Sensors used on soc_camera driver"
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@ -96,6 +96,7 @@ obj-$(CONFIG_VIDEO_LM3646) += lm3646.o
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obj-$(CONFIG_VIDEO_SMIAPP_PLL) += smiapp-pll.o
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obj-$(CONFIG_VIDEO_AK881X) += ak881x.o
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obj-$(CONFIG_VIDEO_IR_I2C) += ir-kbd-i2c.o
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obj-$(CONFIG_VIDEO_I2C) += video-i2c.o
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obj-$(CONFIG_VIDEO_ML86V7667) += ml86v7667.o
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obj-$(CONFIG_VIDEO_OV2659) += ov2659.o
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obj-$(CONFIG_VIDEO_TC358743) += tc358743.o
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564
drivers/media/i2c/video-i2c.c
Normal file
564
drivers/media/i2c/video-i2c.c
Normal file
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@ -0,0 +1,564 @@
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// 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/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/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 i2c_client *client;
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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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};
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const static struct v4l2_fmtdesc amg88xx_format = {
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.pixelformat = V4L2_PIX_FMT_Y12,
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};
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const static 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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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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/* max frames per second */
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unsigned int max_fps;
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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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/* xfer function */
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int (*xfer)(struct video_i2c_data *data, char *buf);
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};
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static int amg88xx_xfer(struct video_i2c_data *data, char *buf)
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{
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struct i2c_client *client = data->client;
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struct i2c_msg msg[2];
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u8 reg = 0x80;
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int ret;
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msg[0].addr = client->addr;
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msg[0].flags = 0;
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msg[0].len = 1;
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msg[0].buf = (char *)®
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msg[1].addr = client->addr;
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msg[1].flags = I2C_M_RD;
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msg[1].len = data->chip->buffer_size;
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msg[1].buf = (char *)buf;
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ret = i2c_transfer(client->adapter, msg, 2);
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return (ret == 2) ? 0 : -EIO;
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}
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#define AMG88XX 0
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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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.max_fps = 10,
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.buffer_size = 128,
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.bpp = 16,
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.xfer = &amg88xx_xfer,
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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 = msecs_to_jiffies(1000 / data->chip->max_fps);
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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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if (data->kthread_vid_cap)
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return 0;
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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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if (!IS_ERR(data->kthread_vid_cap))
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return 0;
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video_i2c_del_list(vq, VB2_BUF_STATE_QUEUED);
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return PTR_ERR(data->kthread_vid_cap);
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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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video_i2c_del_list(vq, VB2_BUF_STATE_ERROR);
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}
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static 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 i2c_client *client = data->client;
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strlcpy(vcap->driver, data->v4l2_dev.name, sizeof(vcap->driver));
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strlcpy(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,
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struct v4l2_input *vin)
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{
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if (vin->index > 0)
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return -EINVAL;
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strlcpy(vin->name, "Camera", sizeof(vin->name));
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vin->type = V4L2_INPUT_TYPE_CAMERA;
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return 0;
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}
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static int video_i2c_enum_fmt_vid_cap(struct file *file, void *fh,
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struct v4l2_fmtdesc *fmt)
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{
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struct video_i2c_data *data = video_drvdata(file);
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enum v4l2_buf_type type = fmt->type;
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if (fmt->index > 0)
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return -EINVAL;
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*fmt = *data->chip->format;
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fmt->type = type;
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return 0;
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}
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static int video_i2c_enum_framesizes(struct file *file, void *fh,
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struct v4l2_frmsizeenum *fsize)
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{
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const struct video_i2c_data *data = video_drvdata(file);
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const struct v4l2_frmsize_discrete *size = data->chip->size;
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/* currently only one frame size is allowed */
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if (fsize->index > 0)
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return -EINVAL;
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if (fsize->pixel_format != data->chip->format->pixelformat)
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return -EINVAL;
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fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
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fsize->discrete.width = size->width;
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fsize->discrete.height = size->height;
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return 0;
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}
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static int video_i2c_enum_frameintervals(struct file *file, void *priv,
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struct v4l2_frmivalenum *fe)
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{
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const struct video_i2c_data *data = video_drvdata(file);
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const struct v4l2_frmsize_discrete *size = data->chip->size;
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if (fe->index > 0)
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return -EINVAL;
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if (fe->width != size->width || fe->height != size->height)
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return -EINVAL;
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fe->type = V4L2_FRMIVAL_TYPE_DISCRETE;
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fe->discrete.numerator = 1;
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fe->discrete.denominator = data->chip->max_fps;
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return 0;
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}
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static int video_i2c_try_fmt_vid_cap(struct file *file, void *fh,
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struct v4l2_format *fmt)
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{
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const struct video_i2c_data *data = video_drvdata(file);
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const struct v4l2_frmsize_discrete *size = data->chip->size;
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struct v4l2_pix_format *pix = &fmt->fmt.pix;
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unsigned int bpp = data->chip->bpp / 8;
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pix->width = size->width;
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pix->height = size->height;
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pix->pixelformat = data->chip->format->pixelformat;
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pix->field = V4L2_FIELD_NONE;
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pix->bytesperline = pix->width * bpp;
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pix->sizeimage = pix->bytesperline * pix->height;
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pix->colorspace = V4L2_COLORSPACE_RAW;
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return 0;
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}
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static int video_i2c_s_fmt_vid_cap(struct file *file, void *fh,
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struct v4l2_format *fmt)
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{
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struct video_i2c_data *data = video_drvdata(file);
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if (vb2_is_busy(&data->vb_vidq))
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return -EBUSY;
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return video_i2c_try_fmt_vid_cap(file, fh, fmt);
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}
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static int video_i2c_g_parm(struct file *filp, void *priv,
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struct v4l2_streamparm *parm)
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{
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struct video_i2c_data *data = video_drvdata(filp);
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if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
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return -EINVAL;
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parm->parm.capture.readbuffers = 1;
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parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
|
||||
parm->parm.capture.timeperframe.numerator = 1;
|
||||
parm->parm.capture.timeperframe.denominator = data->chip->max_fps;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
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_g_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)
|
||||
{
|
||||
kfree(video_get_drvdata(vdev));
|
||||
}
|
||||
|
||||
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->client = client;
|
||||
v4l2_dev = &data->v4l2_dev;
|
||||
strlcpy(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;
|
||||
|
||||
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);
|
||||
|
||||
video_set_drvdata(&data->vdev, data);
|
||||
i2c_set_clientdata(client, data);
|
||||
|
||||
ret = video_register_device(&data->vdev, VFL_TYPE_GRABBER, -1);
|
||||
if (ret < 0)
|
||||
goto error_unregister_device;
|
||||
|
||||
return 0;
|
||||
|
||||
error_unregister_device:
|
||||
v4l2_device_unregister(v4l2_dev);
|
||||
mutex_destroy(&data->lock);
|
||||
mutex_destroy(&data->queue_lock);
|
||||
|
||||
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);
|
||||
|
||||
video_unregister_device(&data->vdev);
|
||||
v4l2_device_unregister(&data->v4l2_dev);
|
||||
|
||||
mutex_destroy(&data->lock);
|
||||
mutex_destroy(&data->queue_lock);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
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,
|
||||
},
|
||||
.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");
|
||||
Loading…
Reference in a new issue