blob: 89ad4ea239f1f7105394787fca4af8d19d410b84 [file] [log] [blame]
Sjur Braendelandb482cd22010-03-30 13:56:23 +00001/*
2 * Copyright (C) ST-Ericsson AB 2010
3 * Author: Sjur Brendeland/sjur.brandeland@stericsson.com
4 * License terms: GNU General Public License (GPL) version 2
5 */
6
7#include <linux/kernel.h>
8#include <linux/types.h>
9#include <linux/slab.h>
10#include <linux/errno.h>
11#include <net/caif/caif_layer.h>
12#include <net/caif/cfsrvl.h>
13#include <net/caif/cfpkt.h>
14
15#define container_obj(layr) ((struct cfsrvl *) layr)
16
17static int cfvidl_receive(struct cflayer *layr, struct cfpkt *pkt);
18static int cfvidl_transmit(struct cflayer *layr, struct cfpkt *pkt);
19
20struct cflayer *cfvidl_create(u8 channel_id, struct dev_info *dev_info)
21{
22 struct cfsrvl *vid = kmalloc(sizeof(struct cfsrvl), GFP_ATOMIC);
23 if (!vid) {
24 pr_warning("CAIF: %s(): Out of memory\n", __func__);
25 return NULL;
26 }
27 caif_assert(offsetof(struct cfsrvl, layer) == 0);
28
29 memset(vid, 0, sizeof(struct cfsrvl));
30 cfsrvl_init(vid, channel_id, dev_info);
31 vid->layer.receive = cfvidl_receive;
32 vid->layer.transmit = cfvidl_transmit;
33 snprintf(vid->layer.name, CAIF_LAYER_NAME_SZ - 1, "vid1");
34 return &vid->layer;
35}
36
37static int cfvidl_receive(struct cflayer *layr, struct cfpkt *pkt)
38{
39 u32 videoheader;
40 if (cfpkt_extr_head(pkt, &videoheader, 4) < 0) {
41 pr_err("CAIF: %s(): Packet is erroneous!\n", __func__);
42 cfpkt_destroy(pkt);
43 return -EPROTO;
44 }
45 return layr->up->receive(layr->up, pkt);
46}
47
48static int cfvidl_transmit(struct cflayer *layr, struct cfpkt *pkt)
49{
50 struct cfsrvl *service = container_obj(layr);
51 struct caif_payload_info *info;
52 u32 videoheader = 0;
53 int ret;
54 if (!cfsrvl_ready(service, &ret))
55 return ret;
56 cfpkt_add_head(pkt, &videoheader, 4);
57 /* Add info for MUX-layer to route the packet out */
58 info = cfpkt_info(pkt);
59 info->channel_id = service->layer.id;
60 info->dev_info = &service->dev_info;
61 ret = layr->dn->transmit(layr->dn, pkt);
62 if (ret < 0)
63 cfpkt_extr_head(pkt, &videoheader, 4);
64 return ret;
65}