Some comments below:
On 07/31/2015 04:10 AM, Antti Palosaari wrote:
> HackRF SDR device has both receiver and transmitter. There is limitation
> that receiver and transmitter cannot be used at the same time
> (half-duplex operation). That patch implements transmitter support to
> existing receiver only driver.
>
> Cc: Hans Verkuil <hverk...@xs4all.nl>
> Signed-off-by: Antti Palosaari <cr...@iki.fi>
> ---
> drivers/media/usb/hackrf/hackrf.c | 894
> ++++++++++++++++++++++++++------------
> 1 file changed, 627 insertions(+), 267 deletions(-)
>
> diff --git a/drivers/media/usb/hackrf/hackrf.c
> b/drivers/media/usb/hackrf/hackrf.c
> index 5bd291b..f4b5606 100644
> --- a/drivers/media/usb/hackrf/hackrf.c
> +++ b/drivers/media/usb/hackrf/hackrf.c
<snip>
> @@ -748,15 +925,11 @@ static int hackrf_s_fmt_sdr_cap(struct file *file, void
> *priv,
> struct v4l2_format *f)
> {
> struct hackrf_dev *dev = video_drvdata(file);
> - struct vb2_queue *q = &dev->vb_queue;
> int i;
>
> dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n",
> (char *)&f->fmt.sdr.pixelformat);
>
> - if (vb2_is_busy(q))
> - return -EBUSY;
> -
Why is this removed?
> memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
> for (i = 0; i < NUM_FORMATS; i++) {
> if (f->fmt.sdr.pixelformat == formats[i].pixelformat) {
> @@ -856,17 +1029,64 @@ static int hackrf_g_tuner(struct file *file, void
> *priv, struct v4l2_tuner *v)
>
> if (v->index == 0) {
> strlcpy(v->name, "HackRF ADC", sizeof(v->name));
> - v->type = V4L2_TUNER_ADC;
> + v->type = V4L2_TUNER_SDR;
> v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
> - v->rangelow = bands_adc[0].rangelow;
> - v->rangehigh = bands_adc[0].rangehigh;
> + v->rangelow = bands_adc_dac[0].rangelow;
> + v->rangehigh = bands_adc_dac[0].rangehigh;
> ret = 0;
> } else if (v->index == 1) {
> - strlcpy(v->name, "HackRF RF", sizeof(v->name));
> + strlcpy(v->name, "HackRF RF RX", sizeof(v->name));
This seems unnecessary. You're calling g_tuner, so it is obvious that it is RX.
I'd keep the name as "HackRF RF".
> v->type = V4L2_TUNER_RF;
> v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
> - v->rangelow = bands_rf[0].rangelow;
> - v->rangehigh = bands_rf[0].rangehigh;
> + v->rangelow = bands_rx_tx[0].rangelow;
> + v->rangehigh = bands_rx_tx[0].rangehigh;
> + ret = 0;
> + } else {
> + ret = -EINVAL;
> + }
> +
> + return ret;
> +}
> +
> +static int hackrf_s_modulator(struct file *file, void *fh,
> + const struct v4l2_modulator *a)
> +{
> + struct hackrf_dev *dev = video_drvdata(file);
> + int ret;
> +
> + dev_dbg(dev->dev, "index=%d\n", a->index);
> +
> + if (a->index == 0)
> + ret = 0;
> + else if (a->index == 1)
> + ret = 0;
> + else
> + ret = -EINVAL;
> +
> + return ret;
I'd just write:
return a->index > 1 ? -EINVAL : 0;
More to the point, why implement this at all? At the moment s_modulator is
meaningless
since there is nothing to set.
> +}
> +
> +static int hackrf_g_modulator(struct file *file, void *fh,
> + struct v4l2_modulator *a)
> +{
> + struct hackrf_dev *dev = video_drvdata(file);
> + int ret;
> +
> + dev_dbg(dev->dev, "index=%d\n", a->index);
> +
> + if (a->index == 0) {
> + strlcpy(a->name, "HackRF DAC", sizeof(a->name));
> + a->type = V4L2_TUNER_SDR;
> + a->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
> + a->rangelow = bands_adc_dac[0].rangelow;
> + a->rangehigh = bands_adc_dac[0].rangehigh;
> + ret = 0;
> + } else if (a->index == 1) {
> + strlcpy(a->name, "HackRF RF TX", sizeof(a->name));
Same as with g_tuner: I'd drop the "TX" part in the name.
> + a->type = V4L2_TUNER_RF;
> + a->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
> + a->rangelow = bands_rx_tx[0].rangelow;
> + a->rangehigh = bands_rx_tx[0].rangehigh;
> ret = 0;
> } else {
> ret = -EINVAL;
<snip>
> @@ -969,6 +1213,11 @@ static const struct v4l2_ioctl_ops hackrf_ioctl_ops = {
> .vidioc_enum_fmt_sdr_cap = hackrf_enum_fmt_sdr_cap,
> .vidioc_try_fmt_sdr_cap = hackrf_try_fmt_sdr_cap,
>
> + .vidioc_s_fmt_sdr_out = hackrf_s_fmt_sdr_cap,
> + .vidioc_g_fmt_sdr_out = hackrf_g_fmt_sdr_cap,
> + .vidioc_enum_fmt_sdr_out = hackrf_enum_fmt_sdr_cap,
> + .vidioc_try_fmt_sdr_out = hackrf_try_fmt_sdr_cap,
> +
Since hackrf_*_fmt_sdr_cap is used for both capture and output I suggest that
those functions are renamed to hackrf_*_fmt_sdr(), dropping the "_cap" part.
> .vidioc_reqbufs = vb2_ioctl_reqbufs,
> .vidioc_create_bufs = vb2_ioctl_create_bufs,
> .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
> @@ -982,6 +1231,9 @@ static const struct v4l2_ioctl_ops hackrf_ioctl_ops = {
> .vidioc_s_tuner = hackrf_s_tuner,
> .vidioc_g_tuner = hackrf_g_tuner,
>
> + .vidioc_s_modulator = hackrf_s_modulator,
> + .vidioc_g_modulator = hackrf_g_modulator,
> +
> .vidioc_s_frequency = hackrf_s_frequency,
> .vidioc_g_frequency = hackrf_g_frequency,
> .vidioc_enum_freq_bands = hackrf_enum_freq_bands,
> @@ -996,6 +1248,7 @@ static const struct v4l2_file_operations hackrf_fops = {
> .open = v4l2_fh_open,
> .release = vb2_fop_release,
> .read = vb2_fop_read,
> + .write = vb2_fop_write,
> .poll = vb2_fop_poll,
> .mmap = vb2_fop_mmap,
> .unlocked_ioctl = video_ioctl2,
<snip>
> @@ -1089,85 +1393,141 @@ static int hackrf_probe(struct usb_interface *intf,
> buf, BUF_SIZE);
> if (ret) {
> dev_err(dev->dev, "Could not detect board\n");
> - goto err_free_mem;
> + goto err_kfree;
> }
>
> buf[BUF_SIZE - 1] = '\0';
> -
> dev_info(dev->dev, "Board ID: %02x\n", u8tmp);
> dev_info(dev->dev, "Firmware version: %s\n", buf);
>
> - /* Init videobuf2 queue structure */
> - dev->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE;
> - dev->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
> - dev->vb_queue.drv_priv = dev;
> - dev->vb_queue.buf_struct_size = sizeof(struct hackrf_frame_buf);
> - dev->vb_queue.ops = &hackrf_vb2_ops;
> - dev->vb_queue.mem_ops = &vb2_vmalloc_memops;
> - dev->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
> - ret = vb2_queue_init(&dev->vb_queue);
> + /* Init vb2 queue structure for receiver */
> + dev->rx_vb2_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE;
> + dev->rx_vb2_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
I suggest that you add VB2_DMABUF here and for tx_vb2_queue.io_modes.
I see no reason to leave that out.
Also add .vidioc_expbuf = vb2_ioctl_expbuf to the ioctl ops.
> + dev->rx_vb2_queue.ops = &hackrf_vb2_ops;
> + dev->rx_vb2_queue.mem_ops = &vb2_vmalloc_memops;
> + dev->rx_vb2_queue.drv_priv = dev;
> + dev->rx_vb2_queue.buf_struct_size = sizeof(struct hackrf_buffer);
> + dev->rx_vb2_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
> + ret = vb2_queue_init(&dev->rx_vb2_queue);
> + if (ret) {
> + dev_err(dev->dev, "Could not initialize rx vb2 queue\n");
> + goto err_kfree;
> + }
> +
> + /* Init vb2 queue structure for transmitter */
> + dev->tx_vb2_queue.type = V4L2_BUF_TYPE_SDR_OUTPUT;
> + dev->tx_vb2_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_WRITE;
> + dev->tx_vb2_queue.ops = &hackrf_vb2_ops;
> + dev->tx_vb2_queue.mem_ops = &vb2_vmalloc_memops;
> + dev->tx_vb2_queue.drv_priv = dev;
> + dev->tx_vb2_queue.buf_struct_size = sizeof(struct hackrf_buffer);
> + dev->tx_vb2_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
> + ret = vb2_queue_init(&dev->tx_vb2_queue);
> if (ret) {
> - dev_err(dev->dev, "Could not initialize vb2 queue\n");
> - goto err_free_mem;
> + dev_err(dev->dev, "Could not initialize tx vb2 queue\n");
> + goto err_kfree;
> }
>
> - /* Init video_device structure */
> - dev->vdev = hackrf_template;
> - dev->vdev.queue = &dev->vb_queue;
> - dev->vdev.queue->lock = &dev->vb_queue_lock;
> - video_set_drvdata(&dev->vdev, dev);
> + /* Register controls for receiver */
> + v4l2_ctrl_handler_init(&dev->rx_ctrl_handler, 5);
> + dev->rx_bandwidth_auto = v4l2_ctrl_new_std(&dev->rx_ctrl_handler,
> + &hackrf_ctrl_ops_rx, V4L2_CID_RF_TUNER_BANDWIDTH_AUTO,
> + 0, 1, 0, 1);
> + dev->rx_bandwidth = v4l2_ctrl_new_std(&dev->rx_ctrl_handler,
> + &hackrf_ctrl_ops_rx, V4L2_CID_RF_TUNER_BANDWIDTH,
> + 1750000, 28000000, 50000, 1750000);
> + v4l2_ctrl_auto_cluster(2, &dev->rx_bandwidth_auto, 0, false);
> + dev->rx_rf_gain = v4l2_ctrl_new_std(&dev->rx_ctrl_handler,
> + &hackrf_ctrl_ops_rx, V4L2_CID_RF_TUNER_RF_GAIN, 0, 12, 12, 0);
> + dev->rx_lna_gain = v4l2_ctrl_new_std(&dev->rx_ctrl_handler,
> + &hackrf_ctrl_ops_rx, V4L2_CID_RF_TUNER_LNA_GAIN, 0, 40, 8, 0);
> + dev->rx_if_gain = v4l2_ctrl_new_std(&dev->rx_ctrl_handler,
> + &hackrf_ctrl_ops_rx, V4L2_CID_RF_TUNER_IF_GAIN, 0, 62, 2, 0);
> + if (dev->rx_ctrl_handler.error) {
> + ret = dev->rx_ctrl_handler.error;
> + dev_err(dev->dev, "Could not initialize controls\n");
> + goto err_v4l2_ctrl_handler_free_rx;
> + }
> + v4l2_ctrl_handler_setup(&dev->rx_ctrl_handler);
> +
> + /* Register controls for transmitter */
> + v4l2_ctrl_handler_init(&dev->tx_ctrl_handler, 4);
> + dev->tx_bandwidth_auto = v4l2_ctrl_new_std(&dev->tx_ctrl_handler,
> + &hackrf_ctrl_ops_tx, V4L2_CID_RF_TUNER_BANDWIDTH_AUTO,
> + 0, 1, 0, 1);
> + dev->tx_bandwidth = v4l2_ctrl_new_std(&dev->tx_ctrl_handler,
> + &hackrf_ctrl_ops_tx, V4L2_CID_RF_TUNER_BANDWIDTH,
> + 1750000, 28000000, 50000, 1750000);
> + v4l2_ctrl_auto_cluster(2, &dev->tx_bandwidth_auto, 0, false);
> + dev->tx_lna_gain = v4l2_ctrl_new_std(&dev->tx_ctrl_handler,
> + &hackrf_ctrl_ops_tx, V4L2_CID_RF_TUNER_LNA_GAIN, 0, 47, 1, 0);
> + dev->tx_rf_gain = v4l2_ctrl_new_std(&dev->tx_ctrl_handler,
> + &hackrf_ctrl_ops_tx, V4L2_CID_RF_TUNER_RF_GAIN, 0, 15, 15, 0);
> + if (dev->tx_ctrl_handler.error) {
> + ret = dev->tx_ctrl_handler.error;
> + dev_err(dev->dev, "Could not initialize controls\n");
> + goto err_v4l2_ctrl_handler_free_tx;
> + }
> + v4l2_ctrl_handler_setup(&dev->tx_ctrl_handler);
>
> /* Register the v4l2_device structure */
> dev->v4l2_dev.release = hackrf_video_release;
> ret = v4l2_device_register(&intf->dev, &dev->v4l2_dev);
> if (ret) {
> dev_err(dev->dev, "Failed to register v4l2-device (%d)\n", ret);
> - goto err_free_mem;
> + goto err_v4l2_ctrl_handler_free_tx;
> }
>
> - /* Register controls */
> - v4l2_ctrl_handler_init(&dev->hdl, 5);
> - dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, &hackrf_ctrl_ops,
> - V4L2_CID_RF_TUNER_BANDWIDTH_AUTO, 0, 1, 1, 1);
> - dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, &hackrf_ctrl_ops,
> - V4L2_CID_RF_TUNER_BANDWIDTH,
> - 1750000, 28000000, 50000, 1750000);
> - v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false);
> - dev->rf_gain = v4l2_ctrl_new_std(&dev->hdl, &hackrf_ctrl_ops,
> - V4L2_CID_RF_TUNER_RF_GAIN, 0, 12, 12, 0);
> - dev->lna_gain = v4l2_ctrl_new_std(&dev->hdl, &hackrf_ctrl_ops,
> - V4L2_CID_RF_TUNER_LNA_GAIN, 0, 40, 8, 0);
> - dev->if_gain = v4l2_ctrl_new_std(&dev->hdl, &hackrf_ctrl_ops,
> - V4L2_CID_RF_TUNER_IF_GAIN, 0, 62, 2, 0);
> - if (dev->hdl.error) {
> - ret = dev->hdl.error;
> - dev_err(dev->dev, "Could not initialize controls\n");
> - goto err_free_controls;
> + /* Init video_device structure for receiver */
> + dev->rx_vdev = hackrf_template;
> + dev->rx_vdev.queue = &dev->rx_vb2_queue;
> + dev->rx_vdev.queue->lock = &dev->vb_queue_lock;
> + dev->rx_vdev.v4l2_dev = &dev->v4l2_dev;
> + dev->rx_vdev.ctrl_handler = &dev->rx_ctrl_handler;
> + dev->rx_vdev.lock = &dev->v4l2_lock;
> + dev->rx_vdev.vfl_dir = VFL_DIR_RX;
> + video_set_drvdata(&dev->rx_vdev, dev);
> + ret = video_register_device(&dev->rx_vdev, VFL_TYPE_SDR, -1);
> + if (ret) {
> + dev_err(dev->dev,
> + "Failed to register as video device (%d)\n", ret);
> + goto err_v4l2_device_unregister;
> }
> -
> - v4l2_ctrl_handler_setup(&dev->hdl);
> -
> - dev->v4l2_dev.ctrl_handler = &dev->hdl;
> - dev->vdev.v4l2_dev = &dev->v4l2_dev;
> - dev->vdev.lock = &dev->v4l2_lock;
> -
> - ret = video_register_device(&dev->vdev, VFL_TYPE_SDR, -1);
> + dev_info(dev->dev, "Registered as %s\n",
> + video_device_node_name(&dev->rx_vdev));
> +
> + /* Init video_device structure for transmitter */
> + dev->tx_vdev = hackrf_template;
> + dev->tx_vdev.queue = &dev->tx_vb2_queue;
> + dev->tx_vdev.queue->lock = &dev->vb_queue_lock;
> + dev->tx_vdev.v4l2_dev = &dev->v4l2_dev;
> + dev->tx_vdev.ctrl_handler = &dev->tx_ctrl_handler;
> + dev->tx_vdev.lock = &dev->v4l2_lock;
> + dev->tx_vdev.vfl_dir = VFL_DIR_TX;
> + video_set_drvdata(&dev->tx_vdev, dev);
> + ret = video_register_device(&dev->tx_vdev, VFL_TYPE_SDR, -1);
> if (ret) {
> - dev_err(dev->dev, "Failed to register as video device (%d)\n",
> - ret);
> - goto err_unregister_v4l2_dev;
> + dev_err(dev->dev,
> + "Failed to register as video device (%d)\n", ret);
> + goto err_video_unregister_device_rx;
> }
> dev_info(dev->dev, "Registered as %s\n",
> - video_device_node_name(&dev->vdev));
> + video_device_node_name(&dev->tx_vdev));
> +
> dev_notice(dev->dev, "SDR API is still slightly experimental and
> functionality changes may follow\n");
> return 0;
> -
> -err_free_controls:
> - v4l2_ctrl_handler_free(&dev->hdl);
> -err_unregister_v4l2_dev:
> +err_video_unregister_device_rx:
> + video_unregister_device(&dev->rx_vdev);
> +err_v4l2_device_unregister:
> v4l2_device_unregister(&dev->v4l2_dev);
> -err_free_mem:
> +err_v4l2_ctrl_handler_free_tx:
> + v4l2_ctrl_handler_free(&dev->tx_ctrl_handler);
> +err_v4l2_ctrl_handler_free_rx:
> + v4l2_ctrl_handler_free(&dev->rx_ctrl_handler);
> +err_kfree:
> kfree(dev);
> +err:
> + dev_dbg(dev->dev, "failed=%d\n", ret);
> return ret;
> }
>
>
Regards,
Hans
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