patch-2.4.21 linux-2.4.21/drivers/isdn/hisax/amd7930.c

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diff -urN linux-2.4.20/drivers/isdn/hisax/amd7930.c linux-2.4.21/drivers/isdn/hisax/amd7930.c
@@ -1,755 +0,0 @@
-/* $Id: amd7930.c,v 1.1.4.1 2001/11/20 14:19:35 kai Exp $
- *
- * HiSax ISDN driver - chip specific routines for AMD 7930
- *
- * Author       Brent Baccala
- * Copyright    by Brent Baccala <baccala@FreeSoft.org>
- *
- * This software may be used and distributed according to the terms
- * of the GNU General Public License, incorporated herein by reference.
- *
- *    - Existing ISDN HiSax driver provides all the smarts
- *    - it compiles, runs, talks to an isolated phone switch, connects
- *      to a Cisco, pings go through
- *    - AMD 7930 support only (no DBRI yet)
- *    - no US NI-1 support (may not work on US phone system - untested)
- *    - periodic packet loss, apparently due to lost interrupts
- *    - ISDN sometimes freezes, requiring reboot before it will work again
- *
- * The code is unreliable enough to be consider alpha
- *
- * This file is (c) under GNU General Public License
- *
- * Advanced Micro Devices' Am79C30A is an ISDN/audio chip used in the
- * SparcStation 1+.  The chip provides microphone and speaker interfaces
- * which provide mono-channel audio at 8K samples per second via either
- * 8-bit A-law or 8-bit mu-law encoding.  Also, the chip features an
- * ISDN BRI Line Interface Unit (LIU), I.430 S/T physical interface,
- * which performs basic D channel LAPD processing and provides raw
- * B channel data.  The digital audio channel, the two ISDN B channels,
- * and two 64 Kbps channels to the microprocessor are all interconnected
- * via a multiplexer.
- *
- * This driver interfaces to the Linux HiSax ISDN driver, which performs
- * all high-level Q.921 and Q.931 ISDN functions.  The file is not
- * itself a hardware driver; rather it uses functions exported by
- * the AMD7930 driver in the sparcaudio subsystem (drivers/sbus/audio),
- * allowing the chip to be simultaneously used for both audio and ISDN data.
- * The hardware driver does _no_ buffering, but provides several callbacks
- * which are called during interrupt service and should therefore run quickly.
- *
- * D channel transmission is performed by passing the hardware driver the
- * address and size of an skb's data area, then waiting for a callback
- * to signal successful transmission of the packet.  A task is then
- * queued to notify the HiSax driver that another packet may be transmitted.
- *
- * D channel reception is quite simple, mainly because of:
- *   1) the slow speed of the D channel - 16 kbps, and
- *   2) the presence of an 8- or 32-byte (depending on chip version) FIFO
- *      to buffer the D channel data on the chip
- * Worst case scenario of back-to-back packets with the 8 byte buffer
- * at 16 kbps yields an service time of 4 ms - long enough to preclude
- * the need for fancy buffering.  We queue a background task that copies
- * data out of the receive buffer into an skb, and the hardware driver
- * simply does nothing until we're done with the receive buffer and
- * reset it for a new packet.
- *
- * B channel processing is more complex, because of:
- *   1) the faster speed - 64 kbps,
- *   2) the lack of any on-chip buffering (it interrupts for every byte), and
- *   3) the lack of any chip support for HDLC encapsulation
- *
- * The HiSax driver can put each B channel into one of three modes -
- * L1_MODE_NULL (channel disabled), L1_MODE_TRANS (transparent data relay),
- * and L1_MODE_HDLC (HDLC encapsulation by low-level driver).
- * L1_MODE_HDLC is the most common, used for almost all "pure" digital
- * data sessions.  L1_MODE_TRANS is used for ISDN audio.
- *
- * HDLC B channel transmission is performed via a large buffer into
- * which the skb is copied while performing HDLC bit-stuffing.  A CRC
- * is computed and attached to the end of the buffer, which is then
- * passed to the low-level routines for raw transmission.  Once
- * transmission is complete, the hardware driver is set to enter HDLC
- * idle by successive transmission of mark (all 1) bytes, waiting for
- * the ISDN driver to prepare another packet for transmission and
- * deliver it.
- *
- * HDLC B channel reception is performed via an X-byte ring buffer
- * divided into N sections of X/N bytes each.  Defaults: X=256 bytes, N=4.
- * As the hardware driver notifies us that each section is full, we
- * hand it the next section and schedule a background task to peruse
- * the received section, bit-by-bit, with an HDLC decoder.  As
- * packets are detected, they are copied into a large buffer while
- * decoding HDLC bit-stuffing.  The ending CRC is verified, and if
- * it is correct, we alloc a new skb of the correct length (which we
- * now know), copy the packet into it, and hand it to the upper layers.
- * Optimization: for large packets, we hand the buffer (which also
- * happens to be an skb) directly to the upper layer after an skb_trim,
- * and alloc a new large buffer for future packets, thus avoiding a copy.
- * Then we return to HDLC processing; state is saved between calls.
- * 
- */
-
-#define __NO_VERSION__
-#include "hisax.h"
-#include "../../sbus/audio/amd7930.h"
-#include "isac.h"
-#include "isdnl1.h"
-#include "rawhdlc.h"
-#include <linux/interrupt.h>
-
-static const char *amd7930_revision = "$Revision: 1.1.4.1 $";
-
-#define RCV_BUFSIZE	1024	/* Size of raw receive buffer in bytes */
-#define RCV_BUFBLKS	4	/* Number of blocks to divide buffer into
-				 * (must divide RCV_BUFSIZE) */
-
-static void Bchan_fill_fifo(struct BCState *, struct sk_buff *);
-
-static void
-Bchan_xmt_bh(struct BCState *bcs)
-{
-	struct sk_buff *skb;
-
-	if (bcs->hw.amd7930.tx_skb != NULL) {
-		dev_kfree_skb(bcs->hw.amd7930.tx_skb);
-		bcs->hw.amd7930.tx_skb = NULL;
-	}
-
-	if ((skb = skb_dequeue(&bcs->squeue))) {
-		Bchan_fill_fifo(bcs, skb);
-	} else {
-		clear_bit(BC_FLG_BUSY, &bcs->Flag);
-		bcs->event |= 1 << B_XMTBUFREADY;
-		queue_task(&bcs->tqueue, &tq_immediate);
-		mark_bh(IMMEDIATE_BH);
-	}
-}
-
-static void
-Bchan_xmit_callback(struct BCState *bcs)
-{
-	queue_task(&bcs->hw.amd7930.tq_xmt, &tq_immediate);
-	mark_bh(IMMEDIATE_BH);
-}
-
-/* B channel transmission: two modes (three, if you count L1_MODE_NULL)
- *
- * L1_MODE_HDLC - We need to do HDLC encapsulation before transmiting
- * the packet (i.e. make_raw_hdlc_data).  Since this can be a
- * time-consuming operation, our completion callback just schedules
- * a bottom half to do encapsulation for the next packet.  In between,
- * the link will just idle
- *
- * L1_MODE_TRANS - Data goes through, well, transparent.  No HDLC encap,
- * and we can't just let the link idle, so the "bottom half" actually
- * gets called during the top half (it's our callback routine in this case),
- * but it's a lot faster now since we don't call make_raw_hdlc_data
- */
-
-static void
-Bchan_fill_fifo(struct BCState *bcs, struct sk_buff *skb)
-{
-	struct IsdnCardState *cs = bcs->cs;
-	int len;
-
-	if ((cs->debug & L1_DEB_HSCX) || (cs->debug & L1_DEB_HSCX_FIFO)) {
-		char tmp[1024];
-		char *t = tmp;
-
-		t += sprintf(t, "amd7930_fill_fifo %c cnt %d",
-			     bcs->channel ? 'B' : 'A', skb->len);
-		if (cs->debug & L1_DEB_HSCX_FIFO)
-			QuickHex(t, skb->data, skb->len);
-		debugl1(cs, tmp);
-	}
-
-	if (bcs->mode == L1_MODE_HDLC) {
-		len = make_raw_hdlc_data(skb->data, skb->len,
-					 bcs->hw.amd7930.tx_buff, RAW_BUFMAX);
-		if (len > 0)
-			amd7930_bxmit(0, bcs->channel,
-				      bcs->hw.amd7930.tx_buff, len,
-				      (void *) &Bchan_xmit_callback,
-				      (void *) bcs);
-		dev_kfree_skb(skb);
-	} else if (bcs->mode == L1_MODE_TRANS) {
-		amd7930_bxmit(0, bcs->channel,
-			      bcs->hw.amd7930.tx_buff, skb->len,
-			      (void *) &Bchan_xmt_bh,
-			      (void *) bcs);
-		bcs->hw.amd7930.tx_skb = skb;
-	} else {
-		dev_kfree_skb(skb);
-	}
-}
-
-static void
-Bchan_mode(struct BCState *bcs, int mode, int bc)
-{
-	struct IsdnCardState *cs = bcs->cs;
-
-	if (cs->debug & L1_DEB_HSCX) {
-		char tmp[40];
-		sprintf(tmp, "AMD 7930 mode %d bchan %d/%d",
-			mode, bc, bcs->channel);
-		debugl1(cs, tmp);
-	}
-	bcs->mode = mode;
-}
-
-/* Bchan_l2l1 is the entry point for upper layer routines that want to
- * transmit on the B channel.  PH_DATA_REQ is a normal packet that
- * we either start transmitting (if idle) or queue (if busy).
- * PH_PULL_REQ can be called to request a callback message (PH_PULL_CNF)
- * once the link is idle.  After a "pull" callback, the upper layer
- * routines can use PH_PULL_IND to send data.
- */
-
-static void
-Bchan_l2l1(struct PStack *st, int pr, void *arg)
-{
-	struct sk_buff *skb = arg;
-
-	switch (pr) {
-		case (PH_DATA_REQ):
-			if (test_bit(BC_FLG_BUSY, &st->l1.bcs->Flag)) {
-				skb_queue_tail(&st->l1.bcs->squeue, skb);
-			} else {
-				test_and_set_bit(BC_FLG_BUSY, &st->l1.bcs->Flag);
-				Bchan_fill_fifo(st->l1.bcs, skb);
-			}
-			break;
-		case (PH_PULL_IND):
-			if (test_bit(BC_FLG_BUSY, &st->l1.bcs->Flag)) {
-				printk(KERN_WARNING "amd7930: this shouldn't happen\n");
-				break;
-			}
-			test_and_set_bit(BC_FLG_BUSY, &st->l1.bcs->Flag);
-			Bchan_fill_fifo(st->l1.bcs, skb);
-			break;
-		case (PH_PULL_REQ):
-			if (!test_bit(BC_FLG_BUSY, &st->l1.bcs->Flag)) {
-				clear_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
-				st->l1.l1l2(st, PH_PULL_CNF, NULL);
-			} else
-				set_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
-			break;
-	}
-}
-
-/* Receiver callback and bottom half - decodes HDLC at leisure (if
- * L1_MODE_HDLC) and passes newly received skb on via bcs->rqueue.  If
- * a large packet is received, stick rv_skb (the buffer that the
- * packet has been decoded into) on the receive queue and alloc a new
- * (large) skb to act as buffer for future receives.  If a small
- * packet is received, leave rv_skb alone, alloc a new skb of the
- * correct size, and copy the packet into it
- */
-
-static void
-Bchan_recv_callback(struct BCState *bcs)
-{
-	struct amd7930_hw *hw = &bcs->hw.amd7930;
-
-	hw->rv_buff_in += RCV_BUFSIZE/RCV_BUFBLKS;
-	hw->rv_buff_in %= RCV_BUFSIZE;
-
-	if (hw->rv_buff_in != hw->rv_buff_out) {
-		amd7930_brecv(0, bcs->channel,
-			      hw->rv_buff + hw->rv_buff_in,
-			      RCV_BUFSIZE/RCV_BUFBLKS,
-			      (void *) &Bchan_recv_callback, (void *) bcs);
-	}
-
-	queue_task(&hw->tq_rcv, &tq_immediate);
-	mark_bh(IMMEDIATE_BH);
-}
-
-static void
-Bchan_rcv_bh(struct BCState *bcs)
-{
-	struct IsdnCardState *cs = bcs->cs;
-	struct amd7930_hw *hw = &bcs->hw.amd7930;
-	struct sk_buff *skb;
-	int len;
-
-	if (cs->debug & L1_DEB_HSCX) {
-		char tmp[1024];
-
-		sprintf(tmp, "amd7930_Bchan_rcv (%d/%d)",
-			hw->rv_buff_in, hw->rv_buff_out);
-		debugl1(cs, tmp);
-		QuickHex(tmp, hw->rv_buff + hw->rv_buff_out,
-			 RCV_BUFSIZE/RCV_BUFBLKS);
-		debugl1(cs, tmp);
-	}
-
-	do {
-		if (bcs->mode == L1_MODE_HDLC) {
-			while ((len = read_raw_hdlc_data(hw->hdlc_state,
-							 hw->rv_buff + hw->rv_buff_out, RCV_BUFSIZE/RCV_BUFBLKS,
-							 hw->rv_skb->tail, HSCX_BUFMAX))) {
-				if (len > 0 && (cs->debug & L1_DEB_HSCX_FIFO)) {
-					char tmp[1024];
-					char *t = tmp;
-
-					t += sprintf(t, "amd7930_Bchan_rcv %c cnt %d", bcs->channel ? 'B' : 'A', len);
-					QuickHex(t, hw->rv_skb->tail, len);
-					debugl1(cs, tmp);
-				}
-
-				if (len > HSCX_BUFMAX/2) {
-					/* Large packet received */
-
-					if (!(skb = dev_alloc_skb(HSCX_BUFMAX))) {
-						printk(KERN_WARNING "amd7930: receive out of memory");
-					} else {
-						skb_put(hw->rv_skb, len);
-						skb_queue_tail(&bcs->rqueue, hw->rv_skb);
-						hw->rv_skb = skb;
-						bcs->event |= 1 << B_RCVBUFREADY;
-						queue_task(&bcs->tqueue, &tq_immediate);
-					}
-				} else if (len > 0) {
-					/* Small packet received */
-
-					if (!(skb = dev_alloc_skb(len))) {
-						printk(KERN_WARNING "amd7930: receive out of memory\n");
-					} else {
-						memcpy(skb_put(skb, len), hw->rv_skb->tail, len);
-						skb_queue_tail(&bcs->rqueue, skb);
-						bcs->event |= 1 << B_RCVBUFREADY;
-						queue_task(&bcs->tqueue, &tq_immediate);
-						mark_bh(IMMEDIATE_BH);
-					}
-				} else {
-					/* Reception Error */
-					/* printk("amd7930: B channel receive error\n"); */
-				}
-			}
-		} else if (bcs->mode == L1_MODE_TRANS) {
-			if (!(skb = dev_alloc_skb(RCV_BUFSIZE/RCV_BUFBLKS))) {
-				printk(KERN_WARNING "amd7930: receive out of memory\n");
-			} else {
-				memcpy(skb_put(skb, RCV_BUFSIZE/RCV_BUFBLKS),
-				       hw->rv_buff + hw->rv_buff_out,
-				       RCV_BUFSIZE/RCV_BUFBLKS);
-				skb_queue_tail(&bcs->rqueue, skb);
-				bcs->event |= 1 << B_RCVBUFREADY;
-				queue_task(&bcs->tqueue, &tq_immediate);
-				mark_bh(IMMEDIATE_BH);
-			}
-		}
-
-		if (hw->rv_buff_in == hw->rv_buff_out) {
-			/* Buffer was filled up - need to restart receiver */
-			amd7930_brecv(0, bcs->channel,
-				      hw->rv_buff + hw->rv_buff_in,
-				      RCV_BUFSIZE/RCV_BUFBLKS,
-				      (void *) &Bchan_recv_callback,
-				      (void *) bcs);
-		}
-
-		hw->rv_buff_out += RCV_BUFSIZE/RCV_BUFBLKS;
-		hw->rv_buff_out %= RCV_BUFSIZE;
-
-	} while (hw->rv_buff_in != hw->rv_buff_out);
-}
-
-static void
-Bchan_close(struct BCState *bcs)
-{
-	struct sk_buff *skb;
-
-	Bchan_mode(bcs, 0, 0);
-	amd7930_bclose(0, bcs->channel);
-
-	if (test_bit(BC_FLG_INIT, &bcs->Flag)) {
-		skb_queue_purge(&bcs->rqueue);
-		skb_queue_purge(&bcs->squeue);
-	}
-	test_and_clear_bit(BC_FLG_INIT, &bcs->Flag);
-}
-
-static int
-Bchan_open(struct BCState *bcs)
-{
-	struct amd7930_hw *hw = &bcs->hw.amd7930;
-
-	if (!test_and_set_bit(BC_FLG_INIT, &bcs->Flag)) {
-		skb_queue_head_init(&bcs->rqueue);
-		skb_queue_head_init(&bcs->squeue);
-	}
-	test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
-
-	amd7930_bopen(0, bcs->channel, 0xff);
-	hw->rv_buff_in = 0;
-	hw->rv_buff_out = 0;
-	hw->tx_skb = NULL;
-	init_hdlc_state(hw->hdlc_state, 0);
-	amd7930_brecv(0, bcs->channel,
-		      hw->rv_buff + hw->rv_buff_in, RCV_BUFSIZE/RCV_BUFBLKS,
-		      (void *) &Bchan_recv_callback, (void *) bcs);
-
-	bcs->event = 0;
-	bcs->tx_cnt = 0;
-	return (0);
-}
-
-static void
-Bchan_init(struct BCState *bcs)
-{
-	if (!(bcs->hw.amd7930.tx_buff = kmalloc(RAW_BUFMAX, GFP_ATOMIC))) {
-		printk(KERN_WARNING
-		       "HiSax: No memory for amd7930.tx_buff\n");
-		return;
-	}
-	if (!(bcs->hw.amd7930.rv_buff = kmalloc(RCV_BUFSIZE, GFP_ATOMIC))) {
-		printk(KERN_WARNING
-		       "HiSax: No memory for amd7930.rv_buff\n");
-		return;
-	}
-	if (!(bcs->hw.amd7930.rv_skb = dev_alloc_skb(HSCX_BUFMAX))) {
-		printk(KERN_WARNING
-		       "HiSax: No memory for amd7930.rv_skb\n");
-		return;
-	}
-	if (!(bcs->hw.amd7930.hdlc_state = kmalloc(sizeof(struct hdlc_state),
-						   GFP_ATOMIC))) {
-		printk(KERN_WARNING
-		       "HiSax: No memory for amd7930.hdlc_state\n");
-		return;
-	}
-
-	bcs->hw.amd7930.tq_rcv.sync = 0;
-	bcs->hw.amd7930.tq_rcv.routine = (void (*)(void *)) &Bchan_rcv_bh;
-	bcs->hw.amd7930.tq_rcv.data = (void *) bcs;
-
-	bcs->hw.amd7930.tq_xmt.sync = 0;
-	bcs->hw.amd7930.tq_xmt.routine = (void (*)(void *)) &Bchan_xmt_bh;
-	bcs->hw.amd7930.tq_xmt.data = (void *) bcs;
-}
-
-static void
-Bchan_manl1(struct PStack *st, int pr,
-	  void *arg)
-{
-	switch (pr) {
-		case (PH_ACTIVATE_REQ):
-			test_and_set_bit(BC_FLG_ACTIV, &st->l1.bcs->Flag);
-			Bchan_mode(st->l1.bcs, st->l1.mode, st->l1.bc);
-			st->l1.l1man(st, PH_ACTIVATE_CNF, NULL);
-			break;
-		case (PH_DEACTIVATE_REQ):
-			if (!test_bit(BC_FLG_BUSY, &st->l1.bcs->Flag))
-				Bchan_mode(st->l1.bcs, 0, 0);
-			test_and_clear_bit(BC_FLG_ACTIV, &st->l1.bcs->Flag);
-			break;
-	}
-}
-
-int
-setstack_amd7930(struct PStack *st, struct BCState *bcs)
-{
-	if (Bchan_open(bcs))
-		return (-1);
-	st->l1.bcs = bcs;
-	st->l2.l2l1 = Bchan_l2l1;
-	st->ma.manl1 = Bchan_manl1;
-	setstack_manager(st);
-	bcs->st = st;
-	return (0);
-}
-
-
-static void
-amd7930_drecv_callback(void *arg, int error, unsigned int count)
-{
-	struct IsdnCardState *cs = (struct IsdnCardState *) arg;
-	static struct tq_struct task;
-	struct sk_buff *skb;
-
-        /* NOTE: This function is called directly from an interrupt handler */
-
-	if (1) {
-		if (!(skb = alloc_skb(count, GFP_ATOMIC)))
-			printk(KERN_WARNING "HiSax: D receive out of memory\n");
-		else {
-			memcpy(skb_put(skb, count), cs->rcvbuf, count);
-			skb_queue_tail(&cs->rq, skb);
-		}
-
-		task.routine = (void *) DChannel_proc_rcv;
-		task.data = (void *) cs;
-		queue_task(&task, &tq_immediate);
-		mark_bh(IMMEDIATE_BH);
-	}
-
-	if (cs->debug & L1_DEB_ISAC_FIFO) {
-		char tmp[128];
-		char *t = tmp;
-
-		t += sprintf(t, "amd7930 Drecv cnt %d", count);
-		if (error) t += sprintf(t, " ERR %x", error);
-		QuickHex(t, cs->rcvbuf, count);
-		debugl1(cs, tmp);
-	}
-
-	amd7930_drecv(0, cs->rcvbuf, MAX_DFRAME_LEN,
-		      &amd7930_drecv_callback, cs);
-}
-
-static void
-amd7930_dxmit_callback(void *arg, int error)
-{
-	struct IsdnCardState *cs = (struct IsdnCardState *) arg;
-	static struct tq_struct task;
-
-        /* NOTE: This function is called directly from an interrupt handler */
-
-	/* may wish to do retransmission here, if error indicates collision */
-
-	if (cs->debug & L1_DEB_ISAC_FIFO) {
-		char tmp[128];
-		char *t = tmp;
-
-		t += sprintf(t, "amd7930 Dxmit cnt %d", cs->tx_skb->len);
-		if (error) t += sprintf(t, " ERR %x", error);
-		QuickHex(t, cs->tx_skb->data, cs->tx_skb->len);
-		debugl1(cs, tmp);
-	}
-
-	cs->tx_skb = NULL;
-
-	task.routine = (void *) DChannel_proc_xmt;
-	task.data = (void *) cs;
-	queue_task(&task, &tq_immediate);
-	mark_bh(IMMEDIATE_BH);
-}
-
-static void
-amd7930_Dchan_l2l1(struct PStack *st, int pr, void *arg)
-{
-	struct IsdnCardState *cs = (struct IsdnCardState *) st->l1.hardware;
-	struct sk_buff *skb = arg;
-	char str[64];
-
-	switch (pr) {
-		case (PH_DATA_REQ):
-			if (cs->tx_skb) {
-				skb_queue_tail(&cs->sq, skb);
-#ifdef L2FRAME_DEBUG		/* psa */
-				if (cs->debug & L1_DEB_LAPD)
-					Logl2Frame(cs, skb, "PH_DATA Queued", 0);
-#endif
-			} else {
-				if ((cs->dlogflag) && (!(skb->data[2] & 1))) {
-					/* I-FRAME */
-					LogFrame(cs, skb->data, skb->len);
-					sprintf(str, "Q.931 frame user->network tei %d", st->l2.tei);
-					dlogframe(cs, skb->data+4, skb->len-4,
-						  str);
-				}
-				cs->tx_skb = skb;
-				cs->tx_cnt = 0;
-#ifdef L2FRAME_DEBUG		/* psa */
-				if (cs->debug & L1_DEB_LAPD)
-					Logl2Frame(cs, skb, "PH_DATA", 0);
-#endif
-				amd7930_dxmit(0, skb->data, skb->len,
-					      &amd7930_dxmit_callback, cs);
-			}
-			break;
-		case (PH_PULL_IND):
-			if (cs->tx_skb) {
-				if (cs->debug & L1_DEB_WARN)
-					debugl1(cs, " l2l1 tx_skb exist this shouldn't happen");
-				skb_queue_tail(&cs->sq, skb);
-				break;
-			}
-			if ((cs->dlogflag) && (!(skb->data[2] & 1))) {	/* I-FRAME */
-				LogFrame(cs, skb->data, skb->len);
-				sprintf(str, "Q.931 frame user->network tei %d", st->l2.tei);
-				dlogframe(cs, skb->data + 4, skb->len - 4,
-					  str);
-			}
-			cs->tx_skb = skb;
-			cs->tx_cnt = 0;
-#ifdef L2FRAME_DEBUG		/* psa */
-			if (cs->debug & L1_DEB_LAPD)
-				Logl2Frame(cs, skb, "PH_DATA_PULLED", 0);
-#endif
-			amd7930_dxmit(0, cs->tx_skb->data, cs->tx_skb->len,
-				      &amd7930_dxmit_callback, cs);
-			break;
-		case (PH_PULL_REQ):
-#ifdef L2FRAME_DEBUG		/* psa */
-			if (cs->debug & L1_DEB_LAPD)
-				debugl1(cs, "-> PH_REQUEST_PULL");
-#endif
-			if (!cs->tx_skb) {
-				test_and_clear_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
-				st->l1.l1l2(st, PH_PULL_CNF, NULL);
-			} else
-				test_and_set_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
-			break;
-	}
-}
-
-int
-setDstack_amd7930(struct PStack *st, struct IsdnCardState *cs)
-{
-	st->l2.l2l1 = amd7930_Dchan_l2l1;
-	if (! cs->rcvbuf) {
-		printk("setDstack_amd7930: No cs->rcvbuf!\n");
-	} else {
-		amd7930_drecv(0, cs->rcvbuf, MAX_DFRAME_LEN,
-			      &amd7930_drecv_callback, cs);
-	}
-	return (0);
-}
-
-static void
-manl1_msg(struct IsdnCardState *cs, int msg, void *arg) {
-	struct PStack *st;
-
-	st = cs->stlist;
-	while (st) {
-		st->ma.manl1(st, msg, arg);
-		st = st->next;
-	}
-}
-
-static void
-amd7930_new_ph(struct IsdnCardState *cs)
-{
-	switch (amd7930_get_liu_state(0)) {
-	        case 3:
-			manl1_msg(cs, PH_POWERUP_CNF, NULL);
-                        break;
-
-	        case 7:
-			manl1_msg(cs, PH_I4_P8_IND, NULL);
-			break;
-
-	        case 8:
-			manl1_msg(cs, PH_RSYNC_IND, NULL);
-			break;
-	}
-}
-
-/* amd7930 LIU state change callback */
-
-static void
-amd7930_liu_callback(struct IsdnCardState *cs)
-{
-	static struct tq_struct task;
-
-	if (!cs)
-		return;
-
-	if (cs->debug & L1_DEB_ISAC) {
-		char tmp[32];
-		sprintf(tmp, "amd7930_liu state %d", amd7930_get_liu_state(0));
-		debugl1(cs, tmp);
-	}
-
-	task.sync = 0;
-	task.routine = (void *) &amd7930_new_ph;
-	task.data = (void *) cs;
-	queue_task(&task, &tq_immediate);
-	mark_bh(IMMEDIATE_BH);
-}
-
-void
-amd7930_l1cmd(struct IsdnCardState *cs, int msg, void *arg)
-{
-	u_char val;
-	char tmp[32];
-	
-	if (cs->debug & L1_DEB_ISAC) {
-		char tmp[32];
-		sprintf(tmp, "amd7930_l1cmd msg %x", msg);
-		debugl1(cs, tmp);
-	}
-
-	switch(msg) {
-		case PH_RESET_REQ:
-			if (amd7930_get_liu_state(0) <= 3)
-				amd7930_liu_activate(0,0);
-			else
-				amd7930_liu_deactivate(0);
-			break;
-		case PH_ENABLE_REQ:
-			break;
-		case PH_INFO3_REQ:
-			amd7930_liu_activate(0,0);
-			break;
-		case PH_TESTLOOP_REQ:
-			break;
-		default:
-			if (cs->debug & L1_DEB_WARN) {
-				sprintf(tmp, "amd7930_l1cmd unknown %4x", msg);
-				debugl1(cs, tmp);
-			}
-			break;
-	}
-}
-
-static void init_amd7930(struct IsdnCardState *cs)
-{
-	Bchan_init(&cs->bcs[0]);
-	Bchan_init(&cs->bcs[1]);
-	cs->bcs[0].BC_SetStack = setstack_amd7930;
-	cs->bcs[1].BC_SetStack = setstack_amd7930;
-	cs->bcs[0].BC_Close = Bchan_close;
-	cs->bcs[1].BC_Close = Bchan_close;
-	Bchan_mode(cs->bcs, 0, 0);
-	Bchan_mode(cs->bcs + 1, 0, 0);
-}
-
-void
-release_amd7930(struct IsdnCardState *cs)
-{
-}
-
-static int
-amd7930_card_msg(struct IsdnCardState *cs, int mt, void *arg)
-{
-	switch (mt) {
-		case CARD_RESET:
-			return(0);
-		case CARD_RELEASE:
-			release_amd7930(cs);
-			return(0);
-		case CARD_INIT:
-			cs->l1cmd = amd7930_l1cmd;
-			amd7930_liu_init(0, &amd7930_liu_callback, (void *)cs);
-			init_amd7930(cs);
-			return(0);
-		case CARD_TEST:
-			return(0);
-	}
-	return(0);
-}
-
-int __init
-setup_amd7930(struct IsdnCard *card)
-{
-	struct IsdnCardState *cs = card->cs;
-	char tmp[64];
-
-	strcpy(tmp, amd7930_revision);
-	printk(KERN_INFO "HiSax: AMD7930 driver Rev. %s\n", HiSax_getrev(tmp));
-	if (cs->typ != ISDN_CTYPE_AMD7930)
-		return (0);
-
-        cs->irq = amd7930_get_irqnum(0);
-        if (cs->irq == 0)
-		return (0);
-
-	cs->cardmsg = &amd7930_card_msg;
-
-	return (1);
-}
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TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)