197 lines
6.9 KiB
C
197 lines
6.9 KiB
C
/* $Id: hysdn_sched.c,v 1.5.6.4 2001/11/06 21:58:19 kai Exp $
|
|
*
|
|
* Linux driver for HYSDN cards
|
|
* scheduler routines for handling exchange card <-> pc.
|
|
*
|
|
* Author Werner Cornelius (werner@titro.de) for Hypercope GmbH
|
|
* Copyright 1999 by Werner Cornelius (werner@titro.de)
|
|
*
|
|
* This software may be used and distributed according to the terms
|
|
* of the GNU General Public License, incorporated herein by reference.
|
|
*
|
|
*/
|
|
|
|
#include <linux/signal.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/delay.h>
|
|
#include <asm/io.h>
|
|
|
|
#include "hysdn_defs.h"
|
|
|
|
/*****************************************************************************/
|
|
/* hysdn_sched_rx is called from the cards handler to announce new data is */
|
|
/* available from the card. The routine has to handle the data and return */
|
|
/* with a nonzero code if the data could be worked (or even thrown away), if */
|
|
/* no room to buffer the data is available a zero return tells the card */
|
|
/* to keep the data until later. */
|
|
/*****************************************************************************/
|
|
int
|
|
hysdn_sched_rx(hysdn_card *card, unsigned char *buf, unsigned short len,
|
|
unsigned short chan)
|
|
{
|
|
|
|
switch (chan) {
|
|
case CHAN_NDIS_DATA:
|
|
if (hynet_enable & (1 << card->myid)) {
|
|
/* give packet to network handler */
|
|
hysdn_rx_netpkt(card, buf, len);
|
|
}
|
|
break;
|
|
|
|
case CHAN_ERRLOG:
|
|
hysdn_card_errlog(card, (tErrLogEntry *) buf, len);
|
|
if (card->err_log_state == ERRLOG_STATE_ON)
|
|
card->err_log_state = ERRLOG_STATE_START; /* start new fetch */
|
|
break;
|
|
#ifdef CONFIG_HYSDN_CAPI
|
|
case CHAN_CAPI:
|
|
/* give packet to CAPI handler */
|
|
if (hycapi_enable & (1 << card->myid)) {
|
|
hycapi_rx_capipkt(card, buf, len);
|
|
}
|
|
break;
|
|
#endif /* CONFIG_HYSDN_CAPI */
|
|
default:
|
|
printk(KERN_INFO "irq message channel %d len %d unhandled \n", chan, len);
|
|
break;
|
|
|
|
} /* switch rx channel */
|
|
|
|
return (1); /* always handled */
|
|
} /* hysdn_sched_rx */
|
|
|
|
/*****************************************************************************/
|
|
/* hysdn_sched_tx is called from the cards handler to announce that there is */
|
|
/* room in the tx-buffer to the card and data may be sent if needed. */
|
|
/* If the routine wants to send data it must fill buf, len and chan with the */
|
|
/* appropriate data and return a nonzero value. With a zero return no new */
|
|
/* data to send is assumed. maxlen specifies the buffer size available for */
|
|
/* sending. */
|
|
/*****************************************************************************/
|
|
int
|
|
hysdn_sched_tx(hysdn_card *card, unsigned char *buf,
|
|
unsigned short volatile *len, unsigned short volatile *chan,
|
|
unsigned short maxlen)
|
|
{
|
|
struct sk_buff *skb;
|
|
|
|
if (card->net_tx_busy) {
|
|
card->net_tx_busy = 0; /* reset flag */
|
|
hysdn_tx_netack(card); /* acknowledge packet send */
|
|
} /* a network packet has completely been transferred */
|
|
/* first of all async requests are handled */
|
|
if (card->async_busy) {
|
|
if (card->async_len <= maxlen) {
|
|
memcpy(buf, card->async_data, card->async_len);
|
|
*len = card->async_len;
|
|
*chan = card->async_channel;
|
|
card->async_busy = 0; /* reset request */
|
|
return (1);
|
|
}
|
|
card->async_busy = 0; /* in case of length error */
|
|
} /* async request */
|
|
if ((card->err_log_state == ERRLOG_STATE_START) &&
|
|
(maxlen >= ERRLOG_CMD_REQ_SIZE)) {
|
|
strcpy(buf, ERRLOG_CMD_REQ); /* copy the command */
|
|
*len = ERRLOG_CMD_REQ_SIZE; /* buffer length */
|
|
*chan = CHAN_ERRLOG; /* and channel */
|
|
card->err_log_state = ERRLOG_STATE_ON; /* new state is on */
|
|
return (1); /* tell that data should be send */
|
|
} /* error log start and able to send */
|
|
if ((card->err_log_state == ERRLOG_STATE_STOP) &&
|
|
(maxlen >= ERRLOG_CMD_STOP_SIZE)) {
|
|
strcpy(buf, ERRLOG_CMD_STOP); /* copy the command */
|
|
*len = ERRLOG_CMD_STOP_SIZE; /* buffer length */
|
|
*chan = CHAN_ERRLOG; /* and channel */
|
|
card->err_log_state = ERRLOG_STATE_OFF; /* new state is off */
|
|
return (1); /* tell that data should be send */
|
|
} /* error log start and able to send */
|
|
/* now handle network interface packets */
|
|
if ((hynet_enable & (1 << card->myid)) &&
|
|
(skb = hysdn_tx_netget(card)) != NULL)
|
|
{
|
|
if (skb->len <= maxlen) {
|
|
memcpy(buf, skb->data, skb->len); /* copy the packet to the buffer */
|
|
*len = skb->len;
|
|
*chan = CHAN_NDIS_DATA;
|
|
card->net_tx_busy = 1; /* we are busy sending network data */
|
|
return (1); /* go and send the data */
|
|
} else
|
|
hysdn_tx_netack(card); /* aknowledge packet -> throw away */
|
|
} /* send a network packet if available */
|
|
#ifdef CONFIG_HYSDN_CAPI
|
|
if( ((hycapi_enable & (1 << card->myid))) &&
|
|
((skb = hycapi_tx_capiget(card)) != NULL) )
|
|
{
|
|
if (skb->len <= maxlen) {
|
|
memcpy(buf, skb->data, skb->len);
|
|
*len = skb->len;
|
|
*chan = CHAN_CAPI;
|
|
hycapi_tx_capiack(card);
|
|
return (1); /* go and send the data */
|
|
}
|
|
}
|
|
#endif /* CONFIG_HYSDN_CAPI */
|
|
return (0); /* nothing to send */
|
|
} /* hysdn_sched_tx */
|
|
|
|
|
|
/*****************************************************************************/
|
|
/* send one config line to the card and return 0 if successful, otherwise a */
|
|
/* negative error code. */
|
|
/* The function works with timeouts perhaps not giving the greatest speed */
|
|
/* sending the line, but this should be meaningless beacuse only some lines */
|
|
/* are to be sent and this happens very seldom. */
|
|
/*****************************************************************************/
|
|
int
|
|
hysdn_tx_cfgline(hysdn_card *card, unsigned char *line, unsigned short chan)
|
|
{
|
|
int cnt = 50; /* timeout intervalls */
|
|
unsigned long flags;
|
|
|
|
if (card->debug_flags & LOG_SCHED_ASYN)
|
|
hysdn_addlog(card, "async tx-cfg chan=%d len=%d", chan, strlen(line) + 1);
|
|
|
|
while (card->async_busy) {
|
|
|
|
if (card->debug_flags & LOG_SCHED_ASYN)
|
|
hysdn_addlog(card, "async tx-cfg delayed");
|
|
|
|
msleep_interruptible(20); /* Timeout 20ms */
|
|
if (!--cnt)
|
|
return (-ERR_ASYNC_TIME); /* timed out */
|
|
} /* wait for buffer to become free */
|
|
|
|
spin_lock_irqsave(&card->hysdn_lock, flags);
|
|
strcpy(card->async_data, line);
|
|
card->async_len = strlen(line) + 1;
|
|
card->async_channel = chan;
|
|
card->async_busy = 1; /* request transfer */
|
|
|
|
/* now queue the task */
|
|
schedule_work(&card->irq_queue);
|
|
spin_unlock_irqrestore(&card->hysdn_lock, flags);
|
|
|
|
if (card->debug_flags & LOG_SCHED_ASYN)
|
|
hysdn_addlog(card, "async tx-cfg data queued");
|
|
|
|
cnt++; /* short delay */
|
|
|
|
while (card->async_busy) {
|
|
|
|
if (card->debug_flags & LOG_SCHED_ASYN)
|
|
hysdn_addlog(card, "async tx-cfg waiting for tx-ready");
|
|
|
|
msleep_interruptible(20); /* Timeout 20ms */
|
|
if (!--cnt)
|
|
return (-ERR_ASYNC_TIME); /* timed out */
|
|
} /* wait for buffer to become free again */
|
|
|
|
if (card->debug_flags & LOG_SCHED_ASYN)
|
|
hysdn_addlog(card, "async tx-cfg data send");
|
|
|
|
return (0); /* line send correctly */
|
|
} /* hysdn_tx_cfgline */
|