Am Montag, 16. Januar 2012, 13:29:19 schrieb Hans Verkuil:
> From: Hans Verkuil <hans.verk...@cisco.com>
> +MODULE_DEVICE_TABLE(usb, usb_keene_device_table);
> +
> +struct keene_device {
> + struct usb_device *usbdev;
> + struct usb_interface *intf;
> + struct video_device vdev;
> + struct v4l2_device v4l2_dev;
> + struct v4l2_ctrl_handler hdl;
> + struct mutex lock;
> +
> + u8 buffer[BUFFER_LENGTH];
This is a violation of the DMA API. You need to alocate the buffer with
a separate kmalloc.
> + unsigned curfreq;
> + u8 tx;
> + u8 pa;
> + bool stereo;
> + bool muted;
> + bool preemph_75_us;
> +};
> +
> +static inline struct keene_device *to_keene_dev(struct v4l2_device *v4l2_dev)
> +{
> + return container_of(v4l2_dev, struct keene_device, v4l2_dev);
> +}
> +
> +/* Set frequency (if non-0), PA, mute and turn on/off the FM transmitter. */
> +static int keene_cmd_main(struct keene_device *radio, unsigned freq, bool
> play)
> +{
> + unsigned short freq_send = freq ? (freq - 76 * 16000) / 800 : 0;
> + int ret;
> +
> + radio->buffer[0] = 0x00;
> + radio->buffer[1] = 0x50;
> + radio->buffer[2] = (freq_send >> 8) & 0xff;
> + radio->buffer[3] = freq_send & 0xff;
Please use the endianness macro appropriate here
Regards
Oliver
--
To unsubscribe from this list: send the line "unsubscribe linux-media" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
