Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 207 insertions, 0 deletions

diff --git a/drivers/isdn/hysdn/hysdn_sched.c b/drivers/isdn/hysdn/hysdn_sched.c
new file mode 100644
index 000000000000..4fa3b01707cd
--- /dev/null
+++ b/drivers/isdn/hysdn/hysdn_sched.c
@@ -0,0 +1,207 @@
+/* $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/config.h>
+#include <linux/sched.h>
+#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, uchar * buf, word len, word 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, uchar * buf, word volatile *len, word volatile *chan, word 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, uchar * line, word chan)
+{
+	int cnt = 50;		/* timeout intervalls */
+	ulong flags;
+
+	if (card->debug_flags & LOG_SCHED_ASYN)
+		hysdn_addlog(card, "async tx-cfg chan=%d len=%d", chan, strlen(line) + 1);
+
+	save_flags(flags);
+	cli();
+	while (card->async_busy) {
+		sti();
+
+		if (card->debug_flags & LOG_SCHED_ASYN)
+			hysdn_addlog(card, "async tx-cfg delayed");
+
+		msleep_interruptible(20);		/* Timeout 20ms */
+		if (!--cnt) {
+			restore_flags(flags);
+			return (-ERR_ASYNC_TIME);	/* timed out */
+		}
+		cli();
+	}			/* wait for buffer to become free */
+
+	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);
+	sti();
+
+	if (card->debug_flags & LOG_SCHED_ASYN)
+		hysdn_addlog(card, "async tx-cfg data queued");
+
+	cnt++;			/* short delay */
+	cli();
+
+	while (card->async_busy) {
+		sti();
+
+		if (card->debug_flags & LOG_SCHED_ASYN)
+			hysdn_addlog(card, "async tx-cfg waiting for tx-ready");
+
+		msleep_interruptible(20);		/* Timeout 20ms */
+		if (!--cnt) {
+			restore_flags(flags);
+			return (-ERR_ASYNC_TIME);	/* timed out */
+		}
+		cli();
+	}			/* wait for buffer to become free again */
+
+	restore_flags(flags);
+
+	if (card->debug_flags & LOG_SCHED_ASYN)
+		hysdn_addlog(card, "async tx-cfg data send");
+
+	return (0);		/* line send correctly */
+}				/* hysdn_tx_cfgline */