Hello Hans,
thanks for the improvements. Looks good to me.
Acked-by: Tobias Lorenz <tobias.lor...@gmx.net>
Bye,
Toby
Am Freitag, 4. Mai 2012, 15:30:32 schrieb Hans Verkuil:
> From: Hans Verkuil <hans.verk...@cisco.com>
>
> The radio-si470x-usb driver supported both autosuspend and it stopped the
> radio the moment the last user of the radio device closed it. However, that
> was very confusing since if you play the audio from the device (e.g.
> through arecord -D ... | aplay) then no sound would play unless you had
> the radio device open at the same time, even though there is no need to do
> anything with that node.
>
> On the other hand, the actual suspend/resume functions didn't do anything,
> which would fail if you *did* have the radio node open at that time.
>
> So:
>
> - remove autosuspend (bad idea in general for USB radio devices)
> - move the start/stop out of the open/release functions into the
> resume/suspend functions.
>
> Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
> ---
> drivers/media/radio/si470x/radio-si470x-common.c | 1 -
> drivers/media/radio/si470x/radio-si470x-usb.c | 149
> ++++++++++------------ 2 files changed, 70 insertions(+), 80 deletions(-)
>
> diff --git a/drivers/media/radio/si470x/radio-si470x-common.c
> b/drivers/media/radio/si470x/radio-si470x-common.c index b9a44d4..969cf49
> 100644
> --- a/drivers/media/radio/si470x/radio-si470x-common.c
> +++ b/drivers/media/radio/si470x/radio-si470x-common.c
> @@ -570,7 +570,6 @@ static int si470x_s_ctrl(struct v4l2_ctrl *ctrl)
> else
> radio->registers[POWERCFG] |= POWERCFG_DMUTE;
> return si470x_set_register(radio, POWERCFG);
> - break;
> default:
> return -EINVAL;
> }
> diff --git a/drivers/media/radio/si470x/radio-si470x-usb.c
> b/drivers/media/radio/si470x/radio-si470x-usb.c index f133c3d..e9f6387
> 100644
> --- a/drivers/media/radio/si470x/radio-si470x-usb.c
> +++ b/drivers/media/radio/si470x/radio-si470x-usb.c
> @@ -481,91 +481,20 @@ resubmit:
> }
>
>
> -
> -/*************************************************************************
> * - * File Operations Interface
> -
> **************************************************************************
> / -
> -/*
> - * si470x_fops_open - file open
> - */
> int si470x_fops_open(struct file *file)
> {
> - struct si470x_device *radio = video_drvdata(file);
> - int retval = v4l2_fh_open(file);
> -
> - if (retval)
> - return retval;
> -
> - retval = usb_autopm_get_interface(radio->intf);
> - if (retval < 0)
> - goto done;
> -
> - if (v4l2_fh_is_singular_file(file)) {
> - /* start radio */
> - retval = si470x_start(radio);
> - if (retval < 0) {
> - usb_autopm_put_interface(radio->intf);
> - goto done;
> - }
> -
> - /* initialize interrupt urb */
> - usb_fill_int_urb(radio->int_in_urb, radio->usbdev,
> - usb_rcvintpipe(radio->usbdev,
> - radio->int_in_endpoint->bEndpointAddress),
> - radio->int_in_buffer,
> - le16_to_cpu(radio->int_in_endpoint->wMaxPacketSize),
> - si470x_int_in_callback,
> - radio,
> - radio->int_in_endpoint->bInterval);
> -
> - radio->int_in_running = 1;
> - mb();
> -
> - retval = usb_submit_urb(radio->int_in_urb, GFP_KERNEL);
> - if (retval) {
> - dev_info(&radio->intf->dev,
> - "submitting int urb failed (%d)\n", retval);
> - radio->int_in_running = 0;
> - usb_autopm_put_interface(radio->intf);
> - }
> - }
> -
> -done:
> - if (retval)
> - v4l2_fh_release(file);
> - return retval;
> + return v4l2_fh_open(file);
> }
>
> -
> -/*
> - * si470x_fops_release - file release
> - */
> int si470x_fops_release(struct file *file)
> {
> - struct si470x_device *radio = video_drvdata(file);
> -
> - if (v4l2_fh_is_singular_file(file)) {
> - /* shutdown interrupt handler */
> - if (radio->int_in_running) {
> - radio->int_in_running = 0;
> - if (radio->int_in_urb)
> - usb_kill_urb(radio->int_in_urb);
> - }
> -
> - /* cancel read processes */
> - wake_up_interruptible(&radio->read_queue);
> -
> - /* stop radio */
> - si470x_stop(radio);
> - usb_autopm_put_interface(radio->intf);
> - }
> return v4l2_fh_release(file);
> }
>
> -static void si470x_usb_release(struct video_device *vdev)
> +static void si470x_usb_release(struct v4l2_device *v4l2_dev)
> {
> - struct si470x_device *radio = video_get_drvdata(vdev);
> + struct si470x_device *radio =
> + container_of(v4l2_dev, struct si470x_device, v4l2_dev);
>
> usb_free_urb(radio->int_in_urb);
> v4l2_ctrl_handler_free(&radio->hdl);
> @@ -599,6 +528,38 @@ int si470x_vidioc_querycap(struct file *file, void
> *priv, }
>
>
> +static int si470x_start_usb(struct si470x_device *radio)
> +{
> + int retval;
> +
> + /* start radio */
> + retval = si470x_start(radio);
> + if (retval < 0)
> + return retval;
> +
> + v4l2_ctrl_handler_setup(&radio->hdl);
> +
> + /* initialize interrupt urb */
> + usb_fill_int_urb(radio->int_in_urb, radio->usbdev,
> + usb_rcvintpipe(radio->usbdev,
> + radio->int_in_endpoint->bEndpointAddress),
> + radio->int_in_buffer,
> + le16_to_cpu(radio->int_in_endpoint->wMaxPacketSize),
> + si470x_int_in_callback,
> + radio,
> + radio->int_in_endpoint->bInterval);
> +
> + radio->int_in_running = 1;
> + mb();
> +
> + retval = usb_submit_urb(radio->int_in_urb, GFP_KERNEL);
> + if (retval) {
> + dev_info(&radio->intf->dev,
> + "submitting int urb failed (%d)\n", retval);
> + radio->int_in_running = 0;
> + }
> + return retval;
> +}
>
> /*************************************************************************
> * * USB Interface
> @@ -658,6 +619,7 @@ static int si470x_usb_driver_probe(struct usb_interface
> *intf, goto err_intbuffer;
> }
>
> + radio->v4l2_dev.release = si470x_usb_release;
> retval = v4l2_device_register(&intf->dev, &radio->v4l2_dev);
> if (retval < 0) {
> dev_err(&intf->dev, "couldn't register v4l2_device\n");
> @@ -678,7 +640,7 @@ static int si470x_usb_driver_probe(struct usb_interface
> *intf, radio->videodev.ctrl_handler = &radio->hdl;
> radio->videodev.lock = &radio->lock;
> radio->videodev.v4l2_dev = &radio->v4l2_dev;
> - radio->videodev.release = si470x_usb_release;
> + radio->videodev.release = video_device_release_empty;
> set_bit(V4L2_FL_USE_FH_PRIO, &radio->videodev.flags);
> video_set_drvdata(&radio->videodev, radio);
>
> @@ -754,11 +716,16 @@ static int si470x_usb_driver_probe(struct
> usb_interface *intf, init_waitqueue_head(&radio->read_queue);
> usb_set_intfdata(intf, radio);
>
> + /* start radio */
> + retval = si470x_start_usb(radio);
> + if (retval < 0)
> + goto err_all;
> +
> /* register video device */
> retval = video_register_device(&radio->videodev, VFL_TYPE_RADIO,
> radio_nr);
> if (retval) {
> - dev_warn(&intf->dev, "Could not register video device\n");
> + dev_err(&intf->dev, "Could not register video device\n");
> goto err_all;
> }
>
> @@ -786,8 +753,22 @@ err_initial:
> static int si470x_usb_driver_suspend(struct usb_interface *intf,
> pm_message_t message)
> {
> + struct si470x_device *radio = usb_get_intfdata(intf);
> +
> dev_info(&intf->dev, "suspending now...\n");
>
> + /* shutdown interrupt handler */
> + if (radio->int_in_running) {
> + radio->int_in_running = 0;
> + if (radio->int_in_urb)
> + usb_kill_urb(radio->int_in_urb);
> + }
> +
> + /* cancel read processes */
> + wake_up_interruptible(&radio->read_queue);
> +
> + /* stop radio */
> + si470x_stop(radio);
> return 0;
> }
>
> @@ -797,9 +778,12 @@ static int si470x_usb_driver_suspend(struct
> usb_interface *intf, */
> static int si470x_usb_driver_resume(struct usb_interface *intf)
> {
> + struct si470x_device *radio = usb_get_intfdata(intf);
> +
> dev_info(&intf->dev, "resuming now...\n");
>
> - return 0;
> + /* start radio */
> + return si470x_start_usb(radio);
> }
>
>
> @@ -815,11 +799,18 @@ static void si470x_usb_driver_disconnect(struct
> usb_interface *intf) video_unregister_device(&radio->videodev);
> usb_set_intfdata(intf, NULL);
> mutex_unlock(&radio->lock);
> + v4l2_device_put(&radio->v4l2_dev);
> }
>
>
> /*
> * si470x_usb_driver - usb driver interface
> + *
> + * A note on suspend/resume: this driver had only empty suspend/resume
> + * functions, and when I tried to test suspend/resume it always
> disconnected + * instead of resuming (using my ADS InstantFM stick). So
> I've decided to + * remove these callbacks until someone else with better
> hardware can + * implement and test this.
> */
> static struct usb_driver si470x_usb_driver = {
> .name = DRIVER_NAME,
> @@ -827,8 +818,8 @@ static struct usb_driver si470x_usb_driver = {
> .disconnect = si470x_usb_driver_disconnect,
> .suspend = si470x_usb_driver_suspend,
> .resume = si470x_usb_driver_resume,
> + .reset_resume = si470x_usb_driver_resume,
> .id_table = si470x_usb_driver_id_table,
> - .supports_autosuspend = 1,
> };
>
> module_usb_driver(si470x_usb_driver);
--
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