From b482cd2053e3b90a7b33a78c63cdb6badf2ec383 Mon Sep 17 00:00:00 2001 From: Sjur Braendeland Date: Tue, 30 Mar 2010 13:56:23 +0000 Subject: net-caif: add CAIF core protocol stack CAIF generic protocol implementation. This layer is somewhat generic in order to be able to use and test it outside the Linux Kernel. cfctrl.c - CAIF control protocol layer cfdbgl.c - CAIF debug protocol layer cfdgml.c - CAIF datagram protocol layer cffrml.c - CAIF framing protocol layer cfmuxl.c - CAIF mux protocol layer cfrfml.c - CAIF remote file manager protocol layer cfserl.c - CAIF serial (fragmentation) protocol layer cfsrvl.c - CAIF generic service layer functions cfutill.c - CAIF utility protocol layer cfveil.c - CAIF AT protocol layer cfvidl.c - CAIF video protocol layer Signed-off-by: Sjur Braendeland Signed-off-by: David S. Miller --- net/caif/cfvidl.c | 65 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 net/caif/cfvidl.c (limited to 'net/caif/cfvidl.c') diff --git a/net/caif/cfvidl.c b/net/caif/cfvidl.c new file mode 100644 index 0000000..89ad4ea --- /dev/null +++ b/net/caif/cfvidl.c @@ -0,0 +1,65 @@ +/* + * Copyright (C) ST-Ericsson AB 2010 + * Author: Sjur Brendeland/sjur.brandeland@stericsson.com + * License terms: GNU General Public License (GPL) version 2 + */ + +#include +#include +#include +#include +#include +#include +#include + +#define container_obj(layr) ((struct cfsrvl *) layr) + +static int cfvidl_receive(struct cflayer *layr, struct cfpkt *pkt); +static int cfvidl_transmit(struct cflayer *layr, struct cfpkt *pkt); + +struct cflayer *cfvidl_create(u8 channel_id, struct dev_info *dev_info) +{ + struct cfsrvl *vid = kmalloc(sizeof(struct cfsrvl), GFP_ATOMIC); + if (!vid) { + pr_warning("CAIF: %s(): Out of memory\n", __func__); + return NULL; + } + caif_assert(offsetof(struct cfsrvl, layer) == 0); + + memset(vid, 0, sizeof(struct cfsrvl)); + cfsrvl_init(vid, channel_id, dev_info); + vid->layer.receive = cfvidl_receive; + vid->layer.transmit = cfvidl_transmit; + snprintf(vid->layer.name, CAIF_LAYER_NAME_SZ - 1, "vid1"); + return &vid->layer; +} + +static int cfvidl_receive(struct cflayer *layr, struct cfpkt *pkt) +{ + u32 videoheader; + if (cfpkt_extr_head(pkt, &videoheader, 4) < 0) { + pr_err("CAIF: %s(): Packet is erroneous!\n", __func__); + cfpkt_destroy(pkt); + return -EPROTO; + } + return layr->up->receive(layr->up, pkt); +} + +static int cfvidl_transmit(struct cflayer *layr, struct cfpkt *pkt) +{ + struct cfsrvl *service = container_obj(layr); + struct caif_payload_info *info; + u32 videoheader = 0; + int ret; + if (!cfsrvl_ready(service, &ret)) + return ret; + cfpkt_add_head(pkt, &videoheader, 4); + /* Add info for MUX-layer to route the packet out */ + info = cfpkt_info(pkt); + info->channel_id = service->layer.id; + info->dev_info = &service->dev_info; + ret = layr->dn->transmit(layr->dn, pkt); + if (ret < 0) + cfpkt_extr_head(pkt, &videoheader, 4); + return ret; +} -- cgit v1.1