/* $Id: message.c,v 1.5.8.2 2001/09/23 22:24:59 kai Exp $
*
* functions for sending and receiving control messages
*
* Copyright (C) 1996 SpellCaster Telecommunications Inc.
*
* This software may be used and distributed according to the terms
* of the GNU General Public License, incorporated herein by reference.
*
* For more information, please contact gpl-info@spellcast.com or write:
*
* SpellCaster Telecommunications Inc.
* 5621 Finch Avenue East, Unit #3
* Scarborough, Ontario Canada
* M1B 2T9
* +1 (416) 297-8565
* +1 (416) 297-6433 Facsimile
*/
#include "includes.h"
#include "hardware.h"
#include "message.h"
#include "card.h"
extern board *sc_adapter[];
extern unsigned int cinst;
/*
* Obligatory function prototypes
*/
extern int indicate_status(int,ulong,char*);
extern int scm_command(isdn_ctrl *);
/*
* receive a message from the board
*/
int receivemessage(int card, RspMessage *rspmsg)
{
DualPortMemory *dpm;
unsigned long flags;
if (!IS_VALID_CARD(card)) {
pr_debug("Invalid param: %d is not a valid card id\n", card);
return -EINVAL;
}
pr_debug("%s: Entered receivemessage\n",
sc_adapter[card]->devicename);
/*
* See if there are messages waiting
*/
if (inb(sc_adapter[card]->ioport[FIFO_STATUS]) & RF_HAS_DATA) {
/*
* Map in the DPM to the base page and copy the message
*/
spin_lock_irqsave(&sc_adapter[card]->lock, flags);
outb((sc_adapter[card]->shmem_magic >> 14) | 0x80,
sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
dpm = (DualPortMemory *) sc_adapter[card]->rambase;
memcpy_fromio(rspmsg, &(dpm->rsp_queue[dpm->rsp_tail]),
MSG_LEN);
dpm->rsp_tail = (dpm->rsp_tail+1) % MAX_MESSAGES;
inb(sc_adapter[card]->ioport[FIFO_READ]);
spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
/*
* Tell the board that the message is received
*/
pr_debug("%s: Received Message seq:%d pid:%d time:%d cmd:%d "
"cnt:%d (type,class,code):(%d,%d,%d) "
"link:%d stat:0x%x\n",
sc_adapter[card]->devicename,
rspmsg->sequence_no,
rspmsg->process_id,
rspmsg->time_stamp,
rspmsg->cmd_sequence_no,
rspmsg->msg_byte_cnt,
rspmsg->type,
rspmsg->class,
rspmsg->code,
rspmsg->phy_link_no,
rspmsg->rsp_status);
return 0;
}
return -ENOMSG;
}
/*
* send a message to the board
*/
int sendmessage(int card,
unsigned int procid,
unsigned int type,
unsigned int class,
unsigned int code,
unsigned int link,
unsigned int data_len,
unsigned int *data)
{
DualPortMemory *dpm;
ReqMessage sndmsg;
unsigned long flags;
if (!IS_VALID_CARD(card)) {
pr_debug("Invalid param: %d is not a valid card id\n", card);
return -EINVAL;
}
/*
* Make sure we only send CEPID messages when the engine is up
* and CMPID messages when it is down
*/
if(sc_adapter[card]->EngineUp && procid == CMPID) {
pr_debug("%s: Attempt to send CM message with engine up\n",
sc_adapter[card]->devicename);
return -ESRCH;
}
if(!sc_adapter[card]->EngineUp && procid == CEPID) {
pr_debug("%s: Attempt to send CE message with engine down\n",
sc_adapter[card]->devicename);
return -ESRCH;
}
memset(&sndmsg, 0, MSG_LEN);
sndmsg.msg_byte_cnt = 4;
sndmsg.type = type;
sndmsg.class = class;
sndmsg.code = code;
sndmsg.phy_link_no = link;
if (data_len > 0) {
if (data_len > MSG_DATA_LEN)
data_len = MSG_DATA_LEN;
memcpy(&(sndmsg.msg_data), data, data_len);
sndmsg.msg_byte_cnt = data_len + 8;
}
sndmsg.process_id = procid;
sndmsg.sequence_no = sc_adapter[card]->seq_no++ % 256;
/*
* wait for an empty slot in the queue
*/
while (!(inb(sc_adapter[card]->ioport[FIFO_STATUS]) & WF_NOT_FULL))
udelay(1);
/*
* Disable interrupts and map in shared memory
*/
spin_lock_irqsave(&sc_adapter[card]->lock, flags);
outb((sc_adapter[card]->shmem_magic >> 14) | 0x80,
sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
dpm = (DualPortMemory *) sc_adapter[card]->rambase; /* Fix me */
memcpy_toio(&(dpm->req_queue[dpm->req_head]),&sndmsg,MSG_LEN);
dpm->req_head = (dpm->req_head+1) % MAX_MESSAGES;
outb(sndmsg.sequence_no, sc_adapter[card]->ioport[FIFO_WRITE]);
spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
pr_debug("%s: Sent Message seq:%d pid:%d time:%d "
"cnt:%d (type,class,code):(%d,%d,%d) "
"link:%d\n ",
sc_adapter[card]->devicename,
sndmsg.sequence_no,
sndmsg.process_id,
sndmsg.time_stamp,
sndmsg.msg_byte_cnt,
sndmsg.type,
sndmsg.class,
sndmsg.code,
sndmsg.phy_link_no);
return 0;
}
int send_and_receive(int card,
unsigned int procid,
unsigned char type,
unsigned char class,
unsigned char code,
unsigned char link,
unsigned char data_len,
unsigned char *data,
RspMessage *mesgdata,
int timeout)
{
int retval;
int tries;
if (!IS_VALID_CARD(card)) {
pr_debug("Invalid param: %d is not a valid card id\n", card);
return -EINVAL;
}
sc_adapter[card]->want_async_messages = 1;
retval = sendmessage(card, procid, type, class, code, link,
data_len, (unsigned int *) data);
if (retval) {
pr_debug("%s: SendMessage failed in SAR\n",
sc_adapter[card]->devicename);
sc_adapter[card]->want_async_messages = 0;
return -EIO;
}
tries = 0;
/* wait for the response */
while (tries < timeout) {
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(1);
pr_debug("SAR waiting..\n");
/*
* See if we got our message back
*/
if ((sc_adapter[card]->async_msg.type == type) &&
(sc_adapter[card]->async_msg.class == class) &&
(sc_adapter[card]->async_msg.code == code) &&
(sc_adapter[card]->async_msg.phy_link_no == link)) {
/*
* Got it!
*/
pr_debug("%s: Got ASYNC message\n",
sc_adapter[card]->devicename);
memcpy(mesgdata, &(sc_adapter[card]->async_msg),
sizeof(RspMessage));
sc_adapter[card]->want_async_messages = 0;
return 0;
}
tries++;
}
pr_debug("%s: SAR message timeout\n", sc_adapter[card]->devicename);
sc_adapter[card]->want_async_messages = 0;
return -ETIME;
}
