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b482cd20 SB |
1 | /* |
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 | ||
17 | static int cfvidl_receive(struct cflayer *layr, struct cfpkt *pkt); | |
18 | static int cfvidl_transmit(struct cflayer *layr, struct cfpkt *pkt); | |
19 | ||
20 | struct 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 | ||
37 | static 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 | ||
48 | static 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 | } |