From b482cd2053e3b90a7b33a78c63cdb6badf2ec383 Mon Sep 17 00:00:00 2001 From: Sjur Braendeland Date: Tue, 30 Mar 2010 13:56:23 +0000 Subject: net-caif: add CAIF core protocol stack CAIF generic protocol implementation. This layer is somewhat generic in order to be able to use and test it outside the Linux Kernel. cfctrl.c - CAIF control protocol layer cfdbgl.c - CAIF debug protocol layer cfdgml.c - CAIF datagram protocol layer cffrml.c - CAIF framing protocol layer cfmuxl.c - CAIF mux protocol layer cfrfml.c - CAIF remote file manager protocol layer cfserl.c - CAIF serial (fragmentation) protocol layer cfsrvl.c - CAIF generic service layer functions cfutill.c - CAIF utility protocol layer cfveil.c - CAIF AT protocol layer cfvidl.c - CAIF video protocol layer Signed-off-by: Sjur Braendeland Signed-off-by: David S. Miller --- net/caif/cfsrvl.c | 185 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 185 insertions(+) create mode 100644 net/caif/cfsrvl.c (limited to 'net/caif/cfsrvl.c') diff --git a/net/caif/cfsrvl.c b/net/caif/cfsrvl.c new file mode 100644 index 00000000000..d470c51c643 --- /dev/null +++ b/net/caif/cfsrvl.c @@ -0,0 +1,185 @@ +/* + * Copyright (C) ST-Ericsson AB 2010 + * Author: Sjur Brendeland/sjur.brandeland@stericsson.com + * License terms: GNU General Public License (GPL) version 2 + */ + +#include +#include +#include +#include +#include +#include +#include + +#define SRVL_CTRL_PKT_SIZE 1 +#define SRVL_FLOW_OFF 0x81 +#define SRVL_FLOW_ON 0x80 +#define SRVL_SET_PIN 0x82 +#define SRVL_CTRL_PKT_SIZE 1 + +#define container_obj(layr) container_of(layr, struct cfsrvl, layer) + +static void cfservl_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl, + int phyid) +{ + struct cfsrvl *service = container_obj(layr); + caif_assert(layr->up != NULL); + caif_assert(layr->up->ctrlcmd != NULL); + switch (ctrl) { + case CAIF_CTRLCMD_INIT_RSP: + service->open = true; + layr->up->ctrlcmd(layr->up, ctrl, phyid); + break; + case CAIF_CTRLCMD_DEINIT_RSP: + case CAIF_CTRLCMD_INIT_FAIL_RSP: + service->open = false; + layr->up->ctrlcmd(layr->up, ctrl, phyid); + break; + case _CAIF_CTRLCMD_PHYIF_FLOW_OFF_IND: + if (phyid != service->dev_info.id) + break; + if (service->modem_flow_on) + layr->up->ctrlcmd(layr->up, + CAIF_CTRLCMD_FLOW_OFF_IND, phyid); + service->phy_flow_on = false; + break; + case _CAIF_CTRLCMD_PHYIF_FLOW_ON_IND: + if (phyid != service->dev_info.id) + return; + if (service->modem_flow_on) { + layr->up->ctrlcmd(layr->up, + CAIF_CTRLCMD_FLOW_ON_IND, + phyid); + } + service->phy_flow_on = true; + break; + case CAIF_CTRLCMD_FLOW_OFF_IND: + if (service->phy_flow_on) { + layr->up->ctrlcmd(layr->up, + CAIF_CTRLCMD_FLOW_OFF_IND, phyid); + } + service->modem_flow_on = false; + break; + case CAIF_CTRLCMD_FLOW_ON_IND: + if (service->phy_flow_on) { + layr->up->ctrlcmd(layr->up, + CAIF_CTRLCMD_FLOW_ON_IND, phyid); + } + service->modem_flow_on = true; + break; + case _CAIF_CTRLCMD_PHYIF_DOWN_IND: + /* In case interface is down, let's fake a remove shutdown */ + layr->up->ctrlcmd(layr->up, + CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND, phyid); + break; + case CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND: + layr->up->ctrlcmd(layr->up, ctrl, phyid); + break; + default: + pr_warning("CAIF: %s(): " + "Unexpected ctrl in cfsrvl (%d)\n", __func__, ctrl); + /* We have both modem and phy flow on, send flow on */ + layr->up->ctrlcmd(layr->up, ctrl, phyid); + service->phy_flow_on = true; + break; + } +} + +static int cfservl_modemcmd(struct cflayer *layr, enum caif_modemcmd ctrl) +{ + struct cfsrvl *service = container_obj(layr); + caif_assert(layr != NULL); + caif_assert(layr->dn != NULL); + caif_assert(layr->dn->transmit != NULL); + switch (ctrl) { + case CAIF_MODEMCMD_FLOW_ON_REQ: + { + struct cfpkt *pkt; + struct caif_payload_info *info; + u8 flow_on = SRVL_FLOW_ON; + pkt = cfpkt_create(SRVL_CTRL_PKT_SIZE); + if (!pkt) { + pr_warning("CAIF: %s(): Out of memory\n", + __func__); + return -ENOMEM; + } + + if (cfpkt_add_head(pkt, &flow_on, 1) < 0) { + pr_err("CAIF: %s(): Packet is erroneous!\n", + __func__); + cfpkt_destroy(pkt); + return -EPROTO; + } + info = cfpkt_info(pkt); + info->channel_id = service->layer.id; + info->hdr_len = 1; + info->dev_info = &service->dev_info; + return layr->dn->transmit(layr->dn, pkt); + } + case CAIF_MODEMCMD_FLOW_OFF_REQ: + { + struct cfpkt *pkt; + struct caif_payload_info *info; + u8 flow_off = SRVL_FLOW_OFF; + pkt = cfpkt_create(SRVL_CTRL_PKT_SIZE); + if (cfpkt_add_head(pkt, &flow_off, 1) < 0) { + pr_err("CAIF: %s(): Packet is erroneous!\n", + __func__); + cfpkt_destroy(pkt); + return -EPROTO; + } + info = cfpkt_info(pkt); + info->channel_id = service->layer.id; + info->hdr_len = 1; + info->dev_info = &service->dev_info; + return layr->dn->transmit(layr->dn, pkt); + } + default: + break; + } + return -EINVAL; +} + +void cfservl_destroy(struct cflayer *layer) +{ + kfree(layer); +} + +void cfsrvl_init(struct cfsrvl *service, + u8 channel_id, + struct dev_info *dev_info) +{ + caif_assert(offsetof(struct cfsrvl, layer) == 0); + service->open = false; + service->modem_flow_on = true; + service->phy_flow_on = true; + service->layer.id = channel_id; + service->layer.ctrlcmd = cfservl_ctrlcmd; + service->layer.modemcmd = cfservl_modemcmd; + service->dev_info = *dev_info; +} + +bool cfsrvl_ready(struct cfsrvl *service, int *err) +{ + if (service->open && service->modem_flow_on && service->phy_flow_on) + return true; + if (!service->open) { + *err = -ENOTCONN; + return false; + } + caif_assert(!(service->modem_flow_on && service->phy_flow_on)); + *err = -EAGAIN; + return false; +} +u8 cfsrvl_getphyid(struct cflayer *layer) +{ + struct cfsrvl *servl = container_obj(layer); + return servl->dev_info.id; +} + +bool cfsrvl_phyid_match(struct cflayer *layer, int phyid) +{ + struct cfsrvl *servl = container_obj(layer); + return servl->dev_info.id == phyid; +} -- cgit v1.2.3-18-g5258 From 5b2086567503f9b55136642031ec0067319f58e0 Mon Sep 17 00:00:00 2001 From: Sjur Braendeland Date: Wed, 28 Apr 2010 08:54:36 +0000 Subject: caif: Add reference counting to service layer Changes: o Added functions cfsrvl_get and cfsrvl_put. o Added support release_client to use by socket and net device. o Increase reference counting for in-flight packets from cfmuxl Signed-off-by: Sjur Braendeland Signed-off-by: David S. Miller --- net/caif/cfsrvl.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'net/caif/cfsrvl.c') diff --git a/net/caif/cfsrvl.c b/net/caif/cfsrvl.c index d470c51c643..aff31f34528 100644 --- a/net/caif/cfsrvl.c +++ b/net/caif/cfsrvl.c @@ -158,6 +158,13 @@ void cfsrvl_init(struct cfsrvl *service, service->layer.ctrlcmd = cfservl_ctrlcmd; service->layer.modemcmd = cfservl_modemcmd; service->dev_info = *dev_info; + kref_init(&service->ref); +} + +void cfsrvl_release(struct kref *kref) +{ + struct cfsrvl *service = container_of(kref, struct cfsrvl, ref); + kfree(service); } bool cfsrvl_ready(struct cfsrvl *service, int *err) -- cgit v1.2.3-18-g5258