| // 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/mod_devicetable.h> |
| #include <linux/module.h> |
| #include <linux/mutex.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 * const 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 = i2c_client_get_device_id(client); |
| 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 void 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); |
| } |
| |
| #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"); |