]>
Commit | Line | Data |
---|---|---|
b482cd20 SB |
1 | /* |
2 | * Copyright (C) ST-Ericsson AB 2010 | |
26ee65e6 | 3 | * Author: Sjur Brendeland |
b482cd20 SB |
4 | * License terms: GNU General Public License (GPL) version 2 |
5 | */ | |
6 | ||
b31fa5ba JP |
7 | #define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__ |
8 | ||
b482cd20 SB |
9 | #include <linux/stddef.h> |
10 | #include <linux/slab.h> | |
11 | #include <net/caif/caif_layer.h> | |
12 | #include <net/caif/cfsrvl.h> | |
13 | #include <net/caif/cfpkt.h> | |
14 | ||
15 | #define VEI_PAYLOAD 0x00 | |
16 | #define VEI_CMD_BIT 0x80 | |
17 | #define VEI_FLOW_OFF 0x81 | |
18 | #define VEI_FLOW_ON 0x80 | |
19 | #define VEI_SET_PIN 0x82 | |
441c793a | 20 | |
b482cd20 SB |
21 | #define container_obj(layr) container_of(layr, struct cfsrvl, layer) |
22 | ||
23 | static int cfvei_receive(struct cflayer *layr, struct cfpkt *pkt); | |
24 | static int cfvei_transmit(struct cflayer *layr, struct cfpkt *pkt); | |
25 | ||
26 | struct cflayer *cfvei_create(u8 channel_id, struct dev_info *dev_info) | |
27 | { | |
7ac2ed0c JP |
28 | struct cfsrvl *vei = kzalloc(sizeof(struct cfsrvl), GFP_ATOMIC); |
29 | if (!vei) | |
b482cd20 | 30 | return NULL; |
b482cd20 | 31 | caif_assert(offsetof(struct cfsrvl, layer) == 0); |
b1c74247 | 32 | cfsrvl_init(vei, channel_id, dev_info, true); |
b482cd20 SB |
33 | vei->layer.receive = cfvei_receive; |
34 | vei->layer.transmit = cfvei_transmit; | |
34dcf6a1 | 35 | snprintf(vei->layer.name, CAIF_LAYER_NAME_SZ, "vei%d", channel_id); |
b482cd20 SB |
36 | return &vei->layer; |
37 | } | |
38 | ||
39 | static int cfvei_receive(struct cflayer *layr, struct cfpkt *pkt) | |
40 | { | |
41 | u8 cmd; | |
42 | int ret; | |
43 | caif_assert(layr->up != NULL); | |
44 | caif_assert(layr->receive != NULL); | |
45 | caif_assert(layr->ctrlcmd != NULL); | |
46 | ||
47 | ||
48 | if (cfpkt_extr_head(pkt, &cmd, 1) < 0) { | |
b31fa5ba | 49 | pr_err("Packet is erroneous!\n"); |
b482cd20 SB |
50 | cfpkt_destroy(pkt); |
51 | return -EPROTO; | |
52 | } | |
53 | switch (cmd) { | |
54 | case VEI_PAYLOAD: | |
55 | ret = layr->up->receive(layr->up, pkt); | |
56 | return ret; | |
57 | case VEI_FLOW_OFF: | |
58 | layr->ctrlcmd(layr, CAIF_CTRLCMD_FLOW_OFF_IND, 0); | |
59 | cfpkt_destroy(pkt); | |
60 | return 0; | |
61 | case VEI_FLOW_ON: | |
62 | layr->ctrlcmd(layr, CAIF_CTRLCMD_FLOW_ON_IND, 0); | |
63 | cfpkt_destroy(pkt); | |
64 | return 0; | |
65 | case VEI_SET_PIN: /* SET RS232 PIN */ | |
66 | cfpkt_destroy(pkt); | |
67 | return 0; | |
68 | default: /* SET RS232 PIN */ | |
b31fa5ba | 69 | pr_warn("Unknown VEI control packet %d (0x%x)!\n", cmd, cmd); |
b482cd20 SB |
70 | cfpkt_destroy(pkt); |
71 | return -EPROTO; | |
72 | } | |
73 | } | |
74 | ||
75 | static int cfvei_transmit(struct cflayer *layr, struct cfpkt *pkt) | |
76 | { | |
77 | u8 tmp = 0; | |
78 | struct caif_payload_info *info; | |
79 | int ret; | |
80 | struct cfsrvl *service = container_obj(layr); | |
81 | if (!cfsrvl_ready(service, &ret)) | |
c85c2951 | 82 | goto err; |
b482cd20 SB |
83 | caif_assert(layr->dn != NULL); |
84 | caif_assert(layr->dn->transmit != NULL); | |
b482cd20 SB |
85 | |
86 | if (cfpkt_add_head(pkt, &tmp, 1) < 0) { | |
b31fa5ba | 87 | pr_err("Packet is erroneous!\n"); |
c85c2951 | 88 | ret = -EPROTO; |
89 | goto err; | |
b482cd20 SB |
90 | } |
91 | ||
92 | /* Add info-> for MUX-layer to route the packet out. */ | |
93 | info = cfpkt_info(pkt); | |
94 | info->channel_id = service->layer.id; | |
95 | info->hdr_len = 1; | |
96 | info->dev_info = &service->dev_info; | |
4dd820c0 | 97 | return layr->dn->transmit(layr->dn, pkt); |
c85c2951 | 98 | err: |
99 | cfpkt_destroy(pkt); | |
100 | return ret; | |
b482cd20 | 101 | } |