Commit | Line | Data |
---|---|---|
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/stddef.h> | |
8 | #include <linux/slab.h> | |
9 | #include <net/caif/caif_layer.h> | |
10 | #include <net/caif/cfsrvl.h> | |
11 | #include <net/caif/cfpkt.h> | |
12 | ||
13 | #define VEI_PAYLOAD 0x00 | |
14 | #define VEI_CMD_BIT 0x80 | |
15 | #define VEI_FLOW_OFF 0x81 | |
16 | #define VEI_FLOW_ON 0x80 | |
17 | #define VEI_SET_PIN 0x82 | |
18 | #define VEI_CTRL_PKT_SIZE 1 | |
19 | #define container_obj(layr) container_of(layr, struct cfsrvl, layer) | |
20 | ||
21 | static int cfvei_receive(struct cflayer *layr, struct cfpkt *pkt); | |
22 | static int cfvei_transmit(struct cflayer *layr, struct cfpkt *pkt); | |
23 | ||
24 | struct cflayer *cfvei_create(u8 channel_id, struct dev_info *dev_info) | |
25 | { | |
26 | struct cfsrvl *vei = kmalloc(sizeof(struct cfsrvl), GFP_ATOMIC); | |
27 | if (!vei) { | |
28 | pr_warning("CAIF: %s(): Out of memory\n", __func__); | |
29 | return NULL; | |
30 | } | |
31 | caif_assert(offsetof(struct cfsrvl, layer) == 0); | |
32 | memset(vei, 0, sizeof(struct cfsrvl)); | |
33 | cfsrvl_init(vei, channel_id, dev_info); | |
34 | vei->layer.receive = cfvei_receive; | |
35 | vei->layer.transmit = cfvei_transmit; | |
36 | snprintf(vei->layer.name, CAIF_LAYER_NAME_SZ - 1, "vei%d", channel_id); | |
37 | return &vei->layer; | |
38 | } | |
39 | ||
40 | static int cfvei_receive(struct cflayer *layr, struct cfpkt *pkt) | |
41 | { | |
42 | u8 cmd; | |
43 | int ret; | |
44 | caif_assert(layr->up != NULL); | |
45 | caif_assert(layr->receive != NULL); | |
46 | caif_assert(layr->ctrlcmd != NULL); | |
47 | ||
48 | ||
49 | if (cfpkt_extr_head(pkt, &cmd, 1) < 0) { | |
50 | pr_err("CAIF: %s(): Packet is erroneous!\n", __func__); | |
51 | cfpkt_destroy(pkt); | |
52 | return -EPROTO; | |
53 | } | |
54 | switch (cmd) { | |
55 | case VEI_PAYLOAD: | |
56 | ret = layr->up->receive(layr->up, pkt); | |
57 | return ret; | |
58 | case VEI_FLOW_OFF: | |
59 | layr->ctrlcmd(layr, CAIF_CTRLCMD_FLOW_OFF_IND, 0); | |
60 | cfpkt_destroy(pkt); | |
61 | return 0; | |
62 | case VEI_FLOW_ON: | |
63 | layr->ctrlcmd(layr, CAIF_CTRLCMD_FLOW_ON_IND, 0); | |
64 | cfpkt_destroy(pkt); | |
65 | return 0; | |
66 | case VEI_SET_PIN: /* SET RS232 PIN */ | |
67 | cfpkt_destroy(pkt); | |
68 | return 0; | |
69 | default: /* SET RS232 PIN */ | |
70 | pr_warning("CAIF: %s():Unknown VEI control packet %d (0x%x)!\n", | |
71 | __func__, cmd, cmd); | |
72 | cfpkt_destroy(pkt); | |
73 | return -EPROTO; | |
74 | } | |
75 | } | |
76 | ||
77 | static int cfvei_transmit(struct cflayer *layr, struct cfpkt *pkt) | |
78 | { | |
79 | u8 tmp = 0; | |
80 | struct caif_payload_info *info; | |
81 | int ret; | |
82 | struct cfsrvl *service = container_obj(layr); | |
83 | if (!cfsrvl_ready(service, &ret)) | |
84 | return ret; | |
85 | caif_assert(layr->dn != NULL); | |
86 | caif_assert(layr->dn->transmit != NULL); | |
87 | if (!cfpkt_getlen(pkt) > CAIF_MAX_PAYLOAD_SIZE) { | |
88 | pr_warning("CAIF: %s(): Packet too large - size=%d\n", | |
89 | __func__, cfpkt_getlen(pkt)); | |
90 | return -EOVERFLOW; | |
91 | } | |
92 | ||
93 | if (cfpkt_add_head(pkt, &tmp, 1) < 0) { | |
94 | pr_err("CAIF: %s(): Packet is erroneous!\n", __func__); | |
95 | return -EPROTO; | |
96 | } | |
97 | ||
98 | /* Add info-> for MUX-layer to route the packet out. */ | |
99 | info = cfpkt_info(pkt); | |
100 | info->channel_id = service->layer.id; | |
101 | info->hdr_len = 1; | |
102 | info->dev_info = &service->dev_info; | |
103 | ret = layr->dn->transmit(layr->dn, pkt); | |
104 | if (ret < 0) | |
105 | cfpkt_extr_head(pkt, &tmp, 1); | |
106 | return ret; | |
107 | } |