patch-2.1.27 linux/drivers/isdn/sc/message.c

• Lines: 301
• Date: Tue Feb 25 17:12:50 1997
• Orig file: v2.1.26/linux/drivers/isdn/sc/message.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.26/linux/drivers/isdn/sc/message.c linux/drivers/isdn/sc/message.c
@@ -0,0 +1,300 @@
+/*
+ *  $Id: message.c,v 1.2 1996/11/20 17:49:54 fritz Exp $
+ *  Copyright (C) 1996  SpellCaster Telecommunications Inc.
+ *
+ *  message.c - functions for sending and receiving control messages
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *  For more information, please contact [email protected] 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
+ */
+
+#define __NO_VERSION__
+#include "includes.h"
+#include "hardware.h"
+#include "message.h"
+#include "card.h"
+
+extern board *adapter[];
+extern unsigned int cinst;
+
+/*
+ * Obligitory function prototypes
+ */
+extern int indicate_status(int,ulong,char*);
+extern int scm_command(isdn_ctrl *);
+extern void *memcpy_fromshmem(int, void *, const void *, size_t);
+
+/*
+ * Dump message queue in shared memory to screen
+ */
+void dump_messages(int card) 
+{
+	DualPortMemory dpm;
+	unsigned long flags;
+
+	int i =0;
+	
+	if (!IS_VALID_CARD(card)) {
+		pr_debug("Invalid param: %d is not a valid card id\n", card);
+	}
+
+	save_flags(flags);
+	cli();
+	outb(adapter[card]->ioport[adapter[card]->shmem_pgport], 
+		(adapter[card]->shmem_magic >> 14) | 0x80);
+	memcpy_fromshmem(card, &dpm, 0, sizeof(dpm));
+	restore_flags(flags);
+
+	pr_debug("%s: Dumping Request Queue\n", adapter[card]->devicename);
+	for (i = 0; i < dpm.req_head; i++) {
+		pr_debug("%s: Message #%d: (%d,%d,%d), link: %d\n",
+				adapter[card]->devicename, i,
+				dpm.req_queue[i].type,
+				dpm.req_queue[i].class,
+				dpm.req_queue[i].code,
+				dpm.req_queue[i].phy_link_no);
+	}
+
+	pr_debug("%s: Dumping Response Queue\n", adapter[card]->devicename);
+	for (i = 0; i < dpm.rsp_head; i++) {
+		pr_debug("%s: Message #%d: (%d,%d,%d), link: %d, status: %d\n",
+				adapter[card]->devicename, i,
+				dpm.rsp_queue[i].type,
+				dpm.rsp_queue[i].class,
+				dpm.rsp_queue[i].code,
+				dpm.rsp_queue[i].phy_link_no,
+				dpm.rsp_queue[i].rsp_status);
+	}
+
+}	
+
+/*
+ * 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",adapter[card]->devicename);
+
+	/*
+	 * See if there are messages waiting
+	 */
+	if (inb(adapter[card]->ioport[FIFO_STATUS]) & RF_HAS_DATA) {
+		/*
+		 * Map in the DPM to the base page and copy the message
+		 */
+		save_flags(flags);
+		cli();
+		outb((adapter[card]->shmem_magic >> 14) | 0x80,
+			adapter[card]->ioport[adapter[card]->shmem_pgport]); 
+		dpm = (DualPortMemory *) adapter[card]->rambase;
+		memcpy_fromio(rspmsg, &(dpm->rsp_queue[dpm->rsp_tail]), 
+			MSG_LEN);
+		dpm->rsp_tail = (dpm->rsp_tail+1) % MAX_MESSAGES;
+		inb(adapter[card]->ioport[FIFO_READ]);
+		restore_flags(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",
+					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(adapter[card]->EngineUp && procid == CMPID) {
+		pr_debug("%s: Attempt to send CM message with engine up\n",
+			adapter[card]->devicename);
+		return -ESRCH;
+	}
+
+	if(!adapter[card]->EngineUp && procid == CEPID) {
+		pr_debug("%s: Attempt to send CE message with engine down\n",
+			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 = adapter[card]->seq_no++ % 256;
+
+	/*
+	 * wait for an empty slot in the queue
+	 */
+	while (!(inb(adapter[card]->ioport[FIFO_STATUS]) & WF_NOT_FULL))
+		SLOW_DOWN_IO;
+
+	/*
+	 * Disable interrupts and map in shared memory
+	 */
+	save_flags(flags);
+	cli();
+	outb((adapter[card]->shmem_magic >> 14) | 0x80,
+		adapter[card]->ioport[adapter[card]->shmem_pgport]); 
+	dpm = (DualPortMemory *) 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, adapter[card]->ioport[FIFO_WRITE]);
+	restore_flags(flags);
+		
+	pr_debug("%s: Sent Message seq:%d pid:%d time:%d "
+			"cnt:%d (type,class,code):(%d,%d,%d) "
+			"link:%d\n ",
+				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;
+	}
+
+	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",
+			adapter[card]->devicename);
+		adapter[card]->want_async_messages = 0;
+		return -EIO;
+	}
+
+	tries = 0;
+	/* wait for the response */
+	while (tries < timeout) {
+		current->state = TASK_INTERRUPTIBLE;
+		current->timeout = jiffies + 1; 
+		schedule();
+		
+		pr_debug("SAR waiting..\n");
+
+		/*
+		 * See if we got our message back
+		 */
+		if ((adapter[card]->async_msg.type == type) &&
+		    (adapter[card]->async_msg.class == class) &&
+		    (adapter[card]->async_msg.code == code) &&
+		    (adapter[card]->async_msg.phy_link_no == link)) {
+
+			/*
+			 * Got it!
+			 */
+			pr_debug("%s: Got ASYNC message\n",
+				adapter[card]->devicename);
+			memcpy(mesgdata, &(adapter[card]->async_msg), 
+				sizeof(RspMessage));
+			adapter[card]->want_async_messages = 0;
+			return 0;
+		}
+
+   		tries++;
+	}
+
+	pr_debug("%s: SAR message timeout\n", adapter[card]->devicename);
+	adapter[card]->want_async_messages = 0;
+	return -ETIME;
+}