git://bbs.cooldavid.org / net-next-2.6.git / blame
| 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); | |
| aea34e7a | 87 | if (cfpkt_getlen(pkt) > CAIF_MAX_PAYLOAD_SIZE) { |
| b482cd20 SB |
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 | } |