patch-2.0.36 linux/drivers/isdn/hisax/hscx.c

• Lines: 320
• Date: Sun Nov 15 10:32:58 1998
• Orig file: v2.0.35/linux/drivers/isdn/hisax/hscx.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.0.35/linux/drivers/isdn/hisax/hscx.c linux/drivers/isdn/hisax/hscx.c
@@ -0,0 +1,319 @@
+/* $Id: hscx.c,v 1.3.2.11 1998/11/05 21:14:01 keil Exp $
+
+ * hscx.c   HSCX specific routines
+ *
+ * Author       Karsten Keil (keil@isdn4linux.de)
+ *
+ *
+ * $Log: hscx.c,v $
+ * Revision 1.3.2.11  1998/11/05 21:14:01  keil
+ * minor fixes
+ *
+ * Revision 1.3.2.10  1998/11/03 00:06:37  keil
+ * certification related changes
+ * fixed logging for smaller stack use
+ *
+ * Revision 1.3.2.9  1998/09/27 13:06:14  keil
+ * Apply most changes from 2.1.X (HiSax 3.1)
+ *
+ * Revision 1.3.2.8  1998/09/15 15:25:04  keil
+ * Repair HSCX init
+ *
+ * Revision 1.3.2.7  1998/06/26 22:02:55  keil
+ * send flags between hdlc frames
+ *
+ * Revision 1.3.2.6  1998/06/09 18:26:32  keil
+ * PH_DEACTIVATE B-channel every time signaled to higher layer
+ *
+ * Revision 1.3.2.5  1998/05/27 18:05:34  keil
+ * HiSax 3.0
+ *
+ * Revision 1.3.2.4  1998/04/08 21:57:04  keil
+ * Fix "lltrans ..." message
+ * New init code to fix problems during init if S0 is allready activ
+ *
+ * Revision 1.3.2.3  1997/11/27 12:30:55  keil
+ * cosmetic changes
+ *
+ * Revision 1.3.2.2  1997/11/15 18:54:25  keil
+ * cosmetics
+ *
+ * Revision 1.3.2.1  1997/10/17 22:10:44  keil
+ * new files on 2.0
+ *
+ * Revision 1.3  1997/07/27 21:38:34  keil
+ * new B-channel interface
+ *
+ * Revision 1.2  1997/06/26 11:16:17  keil
+ * first version
+ *
+ *
+ */
+
+#define __NO_VERSION__
+#include "hisax.h"
+#include "hscx.h"
+#include "isac.h"
+#include "isdnl1.h"
+#include <linux/interrupt.h>
+
+static char *HSCXVer[] HISAX_INITDATA =
+{"A1", "?1", "A2", "?3", "A3", "V2.1", "?6", "?7",
+ "?8", "?9", "?10", "?11", "?12", "?13", "?14", "???"};
+
+HISAX_INITFUNC(int
+HscxVersion(struct IsdnCardState *cs, char *s))
+{
+	int verA, verB;
+
+	verA = cs->BC_Read_Reg(cs, 0, HSCX_VSTR) & 0xf;
+	verB = cs->BC_Read_Reg(cs, 1, HSCX_VSTR) & 0xf;
+	printk(KERN_INFO "%s HSCX version A: %s  B: %s\n", s,
+	       HSCXVer[verA], HSCXVer[verB]);
+	if ((verA == 0) | (verA == 0xf) | (verB == 0) | (verB == 0xf))
+		return (1);
+	else
+		return (0);
+}
+
+void
+modehscx(struct BCState *bcs, int mode, int bc)
+{
+	struct IsdnCardState *cs = bcs->cs;
+	int hscx = bcs->hw.hscx.hscx;
+
+	if (cs->debug & L1_DEB_HSCX)
+		debugl1(cs, "hscx %c mode %d ichan %d",
+			'A' + hscx, mode, bc);
+	bcs->mode = mode;
+	bcs->channel = bc;
+	cs->BC_Write_Reg(cs, hscx, HSCX_XAD1, 0xFF);
+	cs->BC_Write_Reg(cs, hscx, HSCX_XAD2, 0xFF);
+	cs->BC_Write_Reg(cs, hscx, HSCX_RAH2, 0xFF);
+	cs->BC_Write_Reg(cs, hscx, HSCX_XBCH, 0x0);
+	cs->BC_Write_Reg(cs, hscx, HSCX_RLCR, 0x0);
+	cs->BC_Write_Reg(cs, hscx, HSCX_CCR1,
+		test_bit(HW_IPAC, &cs->HW_Flags) ? 0x82 : 0x85);
+	cs->BC_Write_Reg(cs, hscx, HSCX_CCR2, 0x30);
+	cs->BC_Write_Reg(cs, hscx, HSCX_XCCR, 7);
+	cs->BC_Write_Reg(cs, hscx, HSCX_RCCR, 7);
+
+	/* Switch IOM 1 SSI */
+	if (test_bit(HW_IOM1, &cs->HW_Flags) && (hscx == 0))
+		bc = 1 - bc;
+
+	if (bc == 0) {
+		cs->BC_Write_Reg(cs, hscx, HSCX_TSAX,
+			      test_bit(HW_IOM1, &cs->HW_Flags) ? 0x7 : 0x2f);
+		cs->BC_Write_Reg(cs, hscx, HSCX_TSAR,
+			      test_bit(HW_IOM1, &cs->HW_Flags) ? 0x7 : 0x2f);
+	} else {
+		cs->BC_Write_Reg(cs, hscx, HSCX_TSAX, 0x3);
+		cs->BC_Write_Reg(cs, hscx, HSCX_TSAR, 0x3);
+	}
+	switch (mode) {
+		case (L1_MODE_NULL):
+			cs->BC_Write_Reg(cs, hscx, HSCX_TSAX, 0x1f);
+			cs->BC_Write_Reg(cs, hscx, HSCX_TSAR, 0x1f);
+			cs->BC_Write_Reg(cs, hscx, HSCX_MODE, 0x84);
+			break;
+		case (L1_MODE_TRANS):
+			cs->BC_Write_Reg(cs, hscx, HSCX_MODE, 0xe4);
+			break;
+		case (L1_MODE_HDLC):
+			cs->BC_Write_Reg(cs, hscx, HSCX_CCR1,
+				test_bit(HW_IPAC, &cs->HW_Flags) ? 0x8a : 0x8d);
+			cs->BC_Write_Reg(cs, hscx, HSCX_MODE, 0x8c);
+			break;
+	}
+	if (mode)
+		cs->BC_Write_Reg(cs, hscx, HSCX_CMDR, 0x41);
+	cs->BC_Write_Reg(cs, hscx, HSCX_ISTA, 0x00);
+}
+
+void
+hscx_sched_event(struct BCState *bcs, int event)
+{
+	bcs->event |= 1 << event;
+	queue_task(&bcs->tqueue, &tq_immediate);
+	mark_bh(IMMEDIATE_BH);
+}
+
+void
+hscx_l2l1(struct PStack *st, int pr, void *arg)
+{
+	struct sk_buff *skb = arg;
+	long flags;
+
+	switch (pr) {
+		case (PH_DATA | REQUEST):
+			save_flags(flags);
+			cli();
+			if (st->l1.bcs->tx_skb) {
+				skb_queue_tail(&st->l1.bcs->squeue, skb);
+				restore_flags(flags);
+			} else {
+				st->l1.bcs->tx_skb = skb;
+				test_and_set_bit(BC_FLG_BUSY, &st->l1.bcs->Flag);
+				st->l1.bcs->hw.hscx.count = 0;
+				restore_flags(flags);
+				st->l1.bcs->cs->BC_Send_Data(st->l1.bcs);
+			}
+			break;
+		case (PH_PULL | INDICATION):
+			if (st->l1.bcs->tx_skb) {
+				printk(KERN_WARNING "hscx_l2l1: this shouldn't happen\n");
+				break;
+			}
+			test_and_set_bit(BC_FLG_BUSY, &st->l1.bcs->Flag);
+			st->l1.bcs->tx_skb = skb;
+			st->l1.bcs->hw.hscx.count = 0;
+			st->l1.bcs->cs->BC_Send_Data(st->l1.bcs);
+			break;
+		case (PH_PULL | REQUEST):
+			if (!st->l1.bcs->tx_skb) {
+				test_and_clear_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
+				st->l1.l1l2(st, PH_PULL | CONFIRM, NULL);
+			} else
+				test_and_set_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
+			break;
+		case (PH_ACTIVATE | REQUEST):
+			test_and_set_bit(BC_FLG_ACTIV, &st->l1.bcs->Flag);
+			modehscx(st->l1.bcs, st->l1.mode, st->l1.bc);
+			l1_msg_b(st, pr, arg);
+			break;
+		case (PH_DEACTIVATE | REQUEST):
+			l1_msg_b(st, pr, arg);
+			break;
+		case (PH_DEACTIVATE | CONFIRM):
+			test_and_clear_bit(BC_FLG_ACTIV, &st->l1.bcs->Flag);
+			test_and_clear_bit(BC_FLG_BUSY, &st->l1.bcs->Flag);
+			modehscx(st->l1.bcs, 0, st->l1.bc);
+			st->l1.l1l2(st, PH_DEACTIVATE | CONFIRM, NULL);
+			break;
+	}
+}
+
+void
+close_hscxstate(struct BCState *bcs)
+{
+	modehscx(bcs, 0, bcs->channel);
+	if (test_and_clear_bit(BC_FLG_INIT, &bcs->Flag)) {
+		if (bcs->hw.hscx.rcvbuf) {
+			kfree(bcs->hw.hscx.rcvbuf);
+			bcs->hw.hscx.rcvbuf = NULL;
+		}
+		if (bcs->blog) {
+			kfree(bcs->blog);
+			bcs->blog = NULL;
+		}
+		discard_queue(&bcs->rqueue);
+		discard_queue(&bcs->squeue);
+		if (bcs->tx_skb) {
+			dev_kfree_skb(bcs->tx_skb, FREE_WRITE);
+			bcs->tx_skb = NULL;
+			test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
+		}
+	}
+}
+
+int
+open_hscxstate(struct IsdnCardState *cs, struct BCState *bcs)
+{
+	if (!test_and_set_bit(BC_FLG_INIT, &bcs->Flag)) {
+		if (!(bcs->hw.hscx.rcvbuf = kmalloc(HSCX_BUFMAX, GFP_ATOMIC))) {
+			printk(KERN_WARNING
+				"HiSax: No memory for hscx.rcvbuf\n");
+			test_and_clear_bit(BC_FLG_INIT, &bcs->Flag);
+			return (1);
+		}
+		if (!(bcs->blog = kmalloc(MAX_BLOG_SPACE, GFP_ATOMIC))) {
+			printk(KERN_WARNING
+				"HiSax: No memory for bcs->blog\n");
+			test_and_clear_bit(BC_FLG_INIT, &bcs->Flag);
+			kfree(bcs->hw.hscx.rcvbuf);
+			bcs->hw.hscx.rcvbuf = NULL;
+			return (2);
+		}
+		skb_queue_head_init(&bcs->rqueue);
+		skb_queue_head_init(&bcs->squeue);
+	}
+	bcs->tx_skb = NULL;
+	test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
+	bcs->event = 0;
+	bcs->hw.hscx.rcvidx = 0;
+	bcs->tx_cnt = 0;
+	return (0);
+}
+
+int
+setstack_hscx(struct PStack *st, struct BCState *bcs)
+{
+	bcs->channel = st->l1.bc;
+	if (open_hscxstate(st->l1.hardware, bcs))
+		return (-1);
+	st->l1.bcs = bcs;
+	st->l2.l2l1 = hscx_l2l1;
+	setstack_manager(st);
+	bcs->st = st;
+	setstack_l1_B(st);
+	return (0);
+}
+
+HISAX_INITFUNC(void
+clear_pending_hscx_ints(struct IsdnCardState *cs))
+{
+	int val, eval;
+
+	val = cs->BC_Read_Reg(cs, 1, HSCX_ISTA);
+	debugl1(cs, "HSCX B ISTA %x", val);
+	if (val & 0x01) {
+		eval = cs->BC_Read_Reg(cs, 1, HSCX_EXIR);
+		debugl1(cs, "HSCX B EXIR %x", eval);
+	}
+	if (val & 0x02) {
+		eval = cs->BC_Read_Reg(cs, 0, HSCX_EXIR);
+		debugl1(cs, "HSCX A EXIR %x", eval);
+	}
+	val = cs->BC_Read_Reg(cs, 0, HSCX_ISTA);
+	debugl1(cs, "HSCX A ISTA %x", val);
+	val = cs->BC_Read_Reg(cs, 1, HSCX_STAR);
+	debugl1(cs, "HSCX B STAR %x", val);
+	val = cs->BC_Read_Reg(cs, 0, HSCX_STAR);
+	debugl1(cs, "HSCX A STAR %x", val);
+	/* disable all IRQ */
+	cs->BC_Write_Reg(cs, 0, HSCX_MASK, 0xFF);
+	cs->BC_Write_Reg(cs, 1, HSCX_MASK, 0xFF);
+}
+
+HISAX_INITFUNC(void
+inithscx(struct IsdnCardState *cs))
+{
+	cs->bcs[0].BC_SetStack = setstack_hscx;
+	cs->bcs[1].BC_SetStack = setstack_hscx;
+	cs->bcs[0].BC_Close = close_hscxstate;
+	cs->bcs[1].BC_Close = close_hscxstate;
+	cs->bcs[0].hw.hscx.hscx = 0;
+	cs->bcs[1].hw.hscx.hscx = 1;
+	modehscx(cs->bcs, 0, 0);
+	modehscx(cs->bcs + 1, 0, 0);
+}
+
+HISAX_INITFUNC(void
+inithscxisac(struct IsdnCardState *cs, int part))
+{
+	if (part & 1) {
+		clear_pending_isac_ints(cs);
+		clear_pending_hscx_ints(cs);
+		initisac(cs);
+		inithscx(cs);
+	}
+	if (part & 2) {
+		/* Reenable all IRQ */
+		cs->writeisac(cs, ISAC_MASK, 0);
+		cs->BC_Write_Reg(cs, 0, HSCX_MASK, 0);
+		cs->BC_Write_Reg(cs, 1, HSCX_MASK, 0);
+		/* RESET Receiver and Transmitter */
+		cs->writeisac(cs, ISAC_CMDR, 0x41);
+	}
+}