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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
Joe Perchesb31fa5b2010-09-05 21:31:11 +00007#define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__
8
Sjur Braendelandb482cd22010-03-30 13:56:23 +00009#include <linux/kernel.h>
10#include <linux/types.h>
11#include <linux/slab.h>
12#include <linux/errno.h>
13#include <net/caif/caif_layer.h>
14#include <net/caif/cfsrvl.h>
15#include <net/caif/cfpkt.h>
16
17#define container_obj(layr) ((struct cfsrvl *) layr)
18
19static int cfvidl_receive(struct cflayer *layr, struct cfpkt *pkt);
20static int cfvidl_transmit(struct cflayer *layr, struct cfpkt *pkt);
21
22struct cflayer *cfvidl_create(u8 channel_id, struct dev_info *dev_info)
23{
Joe Perches7ac2ed02011-08-25 13:22:24 +000024 struct cfsrvl *vid = kzalloc(sizeof(struct cfsrvl), GFP_ATOMIC);
25 if (!vid)
Sjur Braendelandb482cd22010-03-30 13:56:23 +000026 return NULL;
Sjur Braendelandb482cd22010-03-30 13:56:23 +000027 caif_assert(offsetof(struct cfsrvl, layer) == 0);
28
Sjur Braendelandb1c74242010-06-17 06:55:38 +000029 cfsrvl_init(vid, channel_id, dev_info, false);
Sjur Braendelandb482cd22010-03-30 13:56:23 +000030 vid->layer.receive = cfvidl_receive;
31 vid->layer.transmit = cfvidl_transmit;
32 snprintf(vid->layer.name, CAIF_LAYER_NAME_SZ - 1, "vid1");
33 return &vid->layer;
34}
35
36static int cfvidl_receive(struct cflayer *layr, struct cfpkt *pkt)
37{
38 u32 videoheader;
39 if (cfpkt_extr_head(pkt, &videoheader, 4) < 0) {
Joe Perchesb31fa5b2010-09-05 21:31:11 +000040 pr_err("Packet is erroneous!\n");
Sjur Braendelandb482cd22010-03-30 13:56:23 +000041 cfpkt_destroy(pkt);
42 return -EPROTO;
43 }
44 return layr->up->receive(layr->up, pkt);
45}
46
47static int cfvidl_transmit(struct cflayer *layr, struct cfpkt *pkt)
48{
49 struct cfsrvl *service = container_obj(layr);
50 struct caif_payload_info *info;
51 u32 videoheader = 0;
52 int ret;
53 if (!cfsrvl_ready(service, &ret))
54 return ret;
55 cfpkt_add_head(pkt, &videoheader, 4);
56 /* Add info for MUX-layer to route the packet out */
57 info = cfpkt_info(pkt);
58 info->channel_id = service->layer.id;
59 info->dev_info = &service->dev_info;
Sjur Brændeland4dd820c2011-04-11 10:43:51 +000060 return layr->dn->transmit(layr->dn, pkt);
Sjur Braendelandb482cd22010-03-30 13:56:23 +000061}