diff options
Diffstat (limited to 'drivers/media/usb/uvc/uvc_isight.c')
| -rw-r--r-- | drivers/media/usb/uvc/uvc_isight.c | 59 |
1 files changed, 31 insertions, 28 deletions
diff --git a/drivers/media/usb/uvc/uvc_isight.c b/drivers/media/usb/uvc/uvc_isight.c index 8510e7259e76..43cda5e760a3 100644 --- a/drivers/media/usb/uvc/uvc_isight.c +++ b/drivers/media/usb/uvc/uvc_isight.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * uvc_isight.c -- USB Video Class driver - iSight support * @@ -5,12 +6,6 @@ * Ivan N. Zlatev <contact@i-nz.net> * Copyright (C) 2008-2009 * Laurent Pinchart <laurent.pinchart@ideasonboard.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * */ #include <linux/usb.h> @@ -19,7 +14,8 @@ #include "uvcvideo.h" -/* Built-in iSight webcams implements most of UVC 1.0 except a +/* + * Built-in iSight webcams implements most of UVC 1.0 except a * different packet format. Instead of sending a header at the * beginning of each isochronous transfer payload, the webcam sends a * single header per image (on its own in a packet), followed by @@ -27,26 +23,27 @@ * * Offset Size (bytes) Description * ------------------------------------------------------------------ - * 0x00 1 Header length - * 0x01 1 Flags (UVC-compliant) - * 0x02 4 Always equal to '11223344' - * 0x06 8 Always equal to 'deadbeefdeadface' - * 0x0e 16 Unknown + * 0x00 1 Header length + * 0x01 1 Flags (UVC-compliant) + * 0x02 4 Always equal to '11223344' + * 0x06 8 Always equal to 'deadbeefdeadface' + * 0x0e 16 Unknown * * The header can be prefixed by an optional, unknown-purpose byte. */ static int isight_decode(struct uvc_video_queue *queue, struct uvc_buffer *buf, - const __u8 *data, unsigned int len) + const u8 *data, unsigned int len) { - static const __u8 hdr[] = { + static const u8 hdr[] = { 0x11, 0x22, 0x33, 0x44, 0xde, 0xad, 0xbe, 0xef, 0xde, 0xad, 0xfa, 0xce }; + struct uvc_streaming *stream = uvc_queue_to_stream(queue); unsigned int maxlen, nbytes; - __u8 *mem; + u8 *mem; int is_header = 0; if (buf == NULL) @@ -54,22 +51,23 @@ static int isight_decode(struct uvc_video_queue *queue, struct uvc_buffer *buf, if ((len >= 14 && memcmp(&data[2], hdr, 12) == 0) || (len >= 15 && memcmp(&data[3], hdr, 12) == 0)) { - uvc_trace(UVC_TRACE_FRAME, "iSight header found\n"); + uvc_dbg(stream->dev, FRAME, "iSight header found\n"); is_header = 1; } /* Synchronize to the input stream by waiting for a header packet. */ if (buf->state != UVC_BUF_STATE_ACTIVE) { if (!is_header) { - uvc_trace(UVC_TRACE_FRAME, "Dropping packet (out of " - "sync).\n"); + uvc_dbg(stream->dev, FRAME, + "Dropping packet (out of sync)\n"); return 0; } buf->state = UVC_BUF_STATE_ACTIVE; } - /* Mark the buffer as done if we're at the beginning of a new frame. + /* + * Mark the buffer as done if we're at the beginning of a new frame. * * Empty buffers (bytesused == 0) don't trigger end of frame detection * as it doesn't make sense to return an empty buffer. @@ -79,7 +77,8 @@ static int isight_decode(struct uvc_video_queue *queue, struct uvc_buffer *buf, return -EAGAIN; } - /* Copy the video data to the buffer. Skip header packets, as they + /* + * Copy the video data to the buffer. Skip header packets, as they * contain no data. */ if (!is_header) { @@ -90,8 +89,8 @@ static int isight_decode(struct uvc_video_queue *queue, struct uvc_buffer *buf, buf->bytesused += nbytes; if (len > maxlen || buf->bytesused == buf->length) { - uvc_trace(UVC_TRACE_FRAME, "Frame complete " - "(overflow).\n"); + uvc_dbg(stream->dev, FRAME, + "Frame complete (overflow)\n"); buf->state = UVC_BUF_STATE_DONE; } } @@ -99,19 +98,23 @@ static int isight_decode(struct uvc_video_queue *queue, struct uvc_buffer *buf, return 0; } -void uvc_video_decode_isight(struct urb *urb, struct uvc_streaming *stream, - struct uvc_buffer *buf) +void uvc_video_decode_isight(struct uvc_urb *uvc_urb, struct uvc_buffer *buf, + struct uvc_buffer *meta_buf) { + struct urb *urb = uvc_urb->urb; + struct uvc_streaming *stream = uvc_urb->stream; int ret, i; for (i = 0; i < urb->number_of_packets; ++i) { if (urb->iso_frame_desc[i].status < 0) { - uvc_trace(UVC_TRACE_FRAME, "USB isochronous frame " - "lost (%d).\n", - urb->iso_frame_desc[i].status); + uvc_dbg(stream->dev, FRAME, + "USB isochronous frame lost (%d)\n", + urb->iso_frame_desc[i].status); } - /* Decode the payload packet. + /* + * Decode the payload packet. + * * uvc_video_decode is entered twice when a frame transition * has been detected because the end of frame can only be * reliably detected when the first packet of the new frame |