1 files changed, 231 insertions, 0 deletions
diff --git a/drivers/isdn/sc/packet.c b/drivers/isdn/sc/packet.c
new file mode 100644
index 0000000..8e3fac3
--- /dev/null
+++ b/drivers/isdn/sc/packet.c
@@ -0,0 +1,231 @@
+/* $Id: packet.c,v 1.5.8.1 2001/09/23 22:24:59 kai Exp $
+ *
+ * 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;
+
+extern int get_card_from_id(int);
+extern int indicate_status(int, int,ulong, char*);
+extern void memcpy_toshmem(int, void *, const void *, size_t);
+extern void memcpy_fromshmem(int, void *, const void *, size_t);
+extern int sendmessage(int, unsigned int, unsigned int, unsigned int,
+                unsigned int, unsigned int, unsigned int, unsigned int *);
+
+int sndpkt(int devId, int channel, struct sk_buff *data)
+{
+	LLData	ReqLnkWrite;
+	int status;
+	int card;
+	unsigned long len;
+
+	card = get_card_from_id(devId);
+
+	if(!IS_VALID_CARD(card)) {
+		pr_debug("invalid param: %d is not a valid card id\n", card);
+		return -ENODEV;
+	}
+
+	pr_debug("%s: sndpkt: frst = 0x%x nxt = %d  f = %d n = %d\n",
+		sc_adapter[card]->devicename,
+		sc_adapter[card]->channel[channel].first_sendbuf,
+		sc_adapter[card]->channel[channel].next_sendbuf,
+		sc_adapter[card]->channel[channel].free_sendbufs,
+		sc_adapter[card]->channel[channel].num_sendbufs);
+
+	if(!sc_adapter[card]->channel[channel].free_sendbufs) {
+		pr_debug("%s: out of TX buffers\n",
+				sc_adapter[card]->devicename);
+		return -EINVAL;
+	}
+
+	if(data->len > BUFFER_SIZE) {
+		pr_debug("%s: data overflows buffer size (data > buffer)\n",
+			sc_adapter[card]->devicename);
+		return -EINVAL;
+	}
+
+	ReqLnkWrite.buff_offset = sc_adapter[card]->channel[channel].next_sendbuf *
+		BUFFER_SIZE + sc_adapter[card]->channel[channel].first_sendbuf;
+	ReqLnkWrite.msg_len = data->len; /* sk_buff size */
+	pr_debug("%s: writing %d bytes to buffer offset 0x%x\n",
+			sc_adapter[card]->devicename,
+			ReqLnkWrite.msg_len, ReqLnkWrite.buff_offset);
+	memcpy_toshmem(card, (char *)ReqLnkWrite.buff_offset, data->data, ReqLnkWrite.msg_len);
+
+	/*
+	 * sendmessage
+	 */
+	pr_debug("%s: sndpkt size=%d, buf_offset=0x%x buf_indx=%d\n",
+		sc_adapter[card]->devicename,
+		ReqLnkWrite.msg_len, ReqLnkWrite.buff_offset,
+		sc_adapter[card]->channel[channel].next_sendbuf);
+
+	status = sendmessage(card, CEPID, ceReqTypeLnk, ceReqClass1, ceReqLnkWrite,
+				channel+1, sizeof(LLData), (unsigned int*)&ReqLnkWrite);
+	len = data->len;
+	if(status) {
+		pr_debug("%s: failed to send packet, status = %d\n",
+				sc_adapter[card]->devicename, status);
+		return -1;
+	}
+	else {
+		sc_adapter[card]->channel[channel].free_sendbufs--;
+		sc_adapter[card]->channel[channel].next_sendbuf =
+			++sc_adapter[card]->channel[channel].next_sendbuf ==
+			sc_adapter[card]->channel[channel].num_sendbufs ? 0 :
+			sc_adapter[card]->channel[channel].next_sendbuf;
+			pr_debug("%s: packet sent successfully\n", sc_adapter[card]->devicename);
+		dev_kfree_skb(data);
+		indicate_status(card,ISDN_STAT_BSENT,channel, (char *)&len);
+	}
+	return len;
+}
+
+void rcvpkt(int card, RspMessage *rcvmsg)
+{
+	LLData newll;
+	struct sk_buff *skb;
+
+	if(!IS_VALID_CARD(card)) {
+		pr_debug("invalid param: %d is not a valid card id\n", card);
+		return;
+	}
+
+	switch(rcvmsg->rsp_status){
+	case 0x01:
+	case 0x02:
+	case 0x70:
+		pr_debug("%s: error status code: 0x%x\n",
+			sc_adapter[card]->devicename, rcvmsg->rsp_status);
+		return;
+	case 0x00: 
+	    if (!(skb = dev_alloc_skb(rcvmsg->msg_data.response.msg_len))) {
+			printk(KERN_WARNING "%s: rcvpkt out of memory, dropping packet\n",
+				sc_adapter[card]->devicename);
+			return;
+		}
+		skb_put(skb, rcvmsg->msg_data.response.msg_len);
+		pr_debug("%s: getting data from offset: 0x%x\n",
+			sc_adapter[card]->devicename,
+			rcvmsg->msg_data.response.buff_offset);
+		memcpy_fromshmem(card,
+			skb_put(skb, rcvmsg->msg_data.response.msg_len),
+		 	(char *)rcvmsg->msg_data.response.buff_offset,
+			rcvmsg->msg_data.response.msg_len);
+		sc_adapter[card]->card->rcvcallb_skb(sc_adapter[card]->driverId,
+			rcvmsg->phy_link_no-1, skb);
+
+	case 0x03:
+		/*
+	 	 * Recycle the buffer
+	 	 */
+		pr_debug("%s: buffer size : %d\n",
+				sc_adapter[card]->devicename, BUFFER_SIZE);
+/*		memset_shmem(card, rcvmsg->msg_data.response.buff_offset, 0, BUFFER_SIZE); */
+		newll.buff_offset = rcvmsg->msg_data.response.buff_offset;
+		newll.msg_len = BUFFER_SIZE;
+		pr_debug("%s: recycled buffer at offset 0x%x size %d\n",
+			sc_adapter[card]->devicename,
+			newll.buff_offset, newll.msg_len);
+		sendmessage(card, CEPID, ceReqTypeLnk, ceReqClass1, ceReqLnkRead,
+			rcvmsg->phy_link_no, sizeof(LLData), (unsigned int *)&newll);
+	}
+
+}
+
+int setup_buffers(int card, int c)
+{
+	unsigned int nBuffers, i, cBase;
+	unsigned int buffer_size;
+	LLData	RcvBuffOffset;
+
+	if(!IS_VALID_CARD(card)) {
+		pr_debug("invalid param: %d is not a valid card id\n", card);
+		return -ENODEV;
+	}
+
+	/*
+	 * Calculate the buffer offsets (send/recv/send/recv)
+	 */
+	pr_debug("%s: setting up channel buffer space in shared RAM\n",
+			sc_adapter[card]->devicename);
+	buffer_size = BUFFER_SIZE;
+	nBuffers = ((sc_adapter[card]->ramsize - BUFFER_BASE) / buffer_size) / 2;
+	nBuffers = nBuffers > BUFFERS_MAX ? BUFFERS_MAX : nBuffers;
+	pr_debug("%s: calculating buffer space: %d buffers, %d big\n",
+		sc_adapter[card]->devicename,
+		nBuffers, buffer_size);
+	if(nBuffers < 2) {
+		pr_debug("%s: not enough buffer space\n",
+			sc_adapter[card]->devicename);
+		return -1;
+	}
+	cBase = (nBuffers * buffer_size) * (c - 1);
+	pr_debug("%s: channel buffer offset from shared RAM: 0x%x\n",
+			sc_adapter[card]->devicename, cBase);
+	sc_adapter[card]->channel[c-1].first_sendbuf = BUFFER_BASE + cBase;
+	sc_adapter[card]->channel[c-1].num_sendbufs = nBuffers / 2;
+	sc_adapter[card]->channel[c-1].free_sendbufs = nBuffers / 2;
+	sc_adapter[card]->channel[c-1].next_sendbuf = 0;
+	pr_debug("%s: send buffer setup complete: first=0x%x n=%d f=%d, nxt=%d\n",
+				sc_adapter[card]->devicename,
+				sc_adapter[card]->channel[c-1].first_sendbuf,
+				sc_adapter[card]->channel[c-1].num_sendbufs,
+				sc_adapter[card]->channel[c-1].free_sendbufs,
+				sc_adapter[card]->channel[c-1].next_sendbuf);
+
+	/*
+	 * Prep the receive buffers
+	 */
+	pr_debug("%s: adding %d RecvBuffers:\n",
+			sc_adapter[card]->devicename, nBuffers /2);
+	for (i = 0 ; i < nBuffers / 2; i++) {
+		RcvBuffOffset.buff_offset = 
+			((sc_adapter[card]->channel[c-1].first_sendbuf +
+			(nBuffers / 2) * buffer_size) + (buffer_size * i));
+		RcvBuffOffset.msg_len = buffer_size;
+		pr_debug("%s: adding RcvBuffer #%d offset=0x%x sz=%d bufsz:%d\n",
+				sc_adapter[card]->devicename,
+				i + 1, RcvBuffOffset.buff_offset, 
+				RcvBuffOffset.msg_len,buffer_size);
+		sendmessage(card, CEPID, ceReqTypeLnk, ceReqClass1, ceReqLnkRead,
+				c, sizeof(LLData), (unsigned int *)&RcvBuffOffset);
+	} 
+	return 0;
+}
+
+int print_skb(int card,char *skb_p, int len){
+	int i,data;
+	pr_debug("%s: data at 0x%x len: 0x%x\n", sc_adapter[card]->devicename,
+			skb_p,len);
+	for(i=1;i<=len;i++,skb_p++){
+		data = (int) (0xff & (*skb_p));
+		pr_debug("%s: data =  0x%x", sc_adapter[card]->devicename,data);
+		if(!(i%4))
+			pr_debug(" ");
+		if(!(i%32))
+			pr_debug("\n");
+	}
+	pr_debug("\n");
+	return 0;
+}		
+