1080 lines
27 KiB
C
1080 lines
27 KiB
C
/* $Id: hfc_2bds0.c,v 1.18.2.6 2004/02/11 13:21:33 keil Exp $
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*
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* specific routines for CCD's HFC 2BDS0
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*
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* Author Karsten Keil
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* Copyright by Karsten Keil <keil@isdn4linux.de>
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*
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* This software may be used and distributed according to the terms
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* of the GNU General Public License, incorporated herein by reference.
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*
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*/
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#include <linux/init.h>
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#include <linux/sched.h>
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#include "hisax.h"
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#include "hfc_2bds0.h"
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#include "isdnl1.h"
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#include <linux/interrupt.h>
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/*
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#define KDEBUG_DEF
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#include "kdebug.h"
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*/
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#define byteout(addr,val) outb(val,addr)
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#define bytein(addr) inb(addr)
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static void
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dummyf(struct IsdnCardState *cs, u_char * data, int size)
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{
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printk(KERN_WARNING "HiSax: hfcd dummy fifo called\n");
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}
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static inline u_char
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ReadReg(struct IsdnCardState *cs, int data, u_char reg)
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{
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register u_char ret;
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if (data) {
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if (cs->hw.hfcD.cip != reg) {
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cs->hw.hfcD.cip = reg;
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byteout(cs->hw.hfcD.addr | 1, reg);
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}
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ret = bytein(cs->hw.hfcD.addr);
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#ifdef HFC_REG_DEBUG
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if (cs->debug & L1_DEB_HSCX_FIFO && (data != 2))
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debugl1(cs, "t3c RD %02x %02x", reg, ret);
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#endif
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} else
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ret = bytein(cs->hw.hfcD.addr | 1);
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return (ret);
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}
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static inline void
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WriteReg(struct IsdnCardState *cs, int data, u_char reg, u_char value)
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{
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if (cs->hw.hfcD.cip != reg) {
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cs->hw.hfcD.cip = reg;
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byteout(cs->hw.hfcD.addr | 1, reg);
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}
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if (data)
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byteout(cs->hw.hfcD.addr, value);
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#ifdef HFC_REG_DEBUG
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if (cs->debug & L1_DEB_HSCX_FIFO && (data != HFCD_DATA_NODEB))
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debugl1(cs, "t3c W%c %02x %02x", data ? 'D' : 'C', reg, value);
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#endif
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}
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/* Interface functions */
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static u_char
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readreghfcd(struct IsdnCardState *cs, u_char offset)
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{
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return(ReadReg(cs, HFCD_DATA, offset));
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}
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static void
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writereghfcd(struct IsdnCardState *cs, u_char offset, u_char value)
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{
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WriteReg(cs, HFCD_DATA, offset, value);
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}
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static inline int
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WaitForBusy(struct IsdnCardState *cs)
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{
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int to = 130;
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while (!(ReadReg(cs, HFCD_DATA, HFCD_STAT) & HFCD_BUSY) && to) {
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udelay(1);
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to--;
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}
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if (!to)
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printk(KERN_WARNING "HiSax: WaitForBusy timeout\n");
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return (to);
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}
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static inline int
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WaitNoBusy(struct IsdnCardState *cs)
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{
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int to = 130;
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while ((ReadReg(cs, HFCD_STATUS, HFCD_STATUS) & HFCD_BUSY) && to) {
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udelay(1);
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to--;
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}
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if (!to)
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printk(KERN_WARNING "HiSax: WaitNoBusy timeout\n");
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return (to);
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}
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static int
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SelFiFo(struct IsdnCardState *cs, u_char FiFo)
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{
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u_char cip;
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if (cs->hw.hfcD.fifo == FiFo)
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return(1);
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switch(FiFo) {
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case 0: cip = HFCB_FIFO | HFCB_Z1 | HFCB_SEND | HFCB_B1;
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break;
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case 1: cip = HFCB_FIFO | HFCB_Z1 | HFCB_REC | HFCB_B1;
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break;
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case 2: cip = HFCB_FIFO | HFCB_Z1 | HFCB_SEND | HFCB_B2;
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break;
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case 3: cip = HFCB_FIFO | HFCB_Z1 | HFCB_REC | HFCB_B2;
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break;
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case 4: cip = HFCD_FIFO | HFCD_Z1 | HFCD_SEND;
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break;
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case 5: cip = HFCD_FIFO | HFCD_Z1 | HFCD_REC;
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break;
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default:
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debugl1(cs, "SelFiFo Error");
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return(0);
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}
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cs->hw.hfcD.fifo = FiFo;
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WaitNoBusy(cs);
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cs->BC_Write_Reg(cs, HFCD_DATA, cip, 0);
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WaitForBusy(cs);
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return(2);
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}
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static int
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GetFreeFifoBytes_B(struct BCState *bcs)
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{
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int s;
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if (bcs->hw.hfc.f1 == bcs->hw.hfc.f2)
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return (bcs->cs->hw.hfcD.bfifosize);
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s = bcs->hw.hfc.send[bcs->hw.hfc.f1] - bcs->hw.hfc.send[bcs->hw.hfc.f2];
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if (s <= 0)
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s += bcs->cs->hw.hfcD.bfifosize;
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s = bcs->cs->hw.hfcD.bfifosize - s;
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return (s);
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}
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static int
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GetFreeFifoBytes_D(struct IsdnCardState *cs)
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{
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int s;
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if (cs->hw.hfcD.f1 == cs->hw.hfcD.f2)
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return (cs->hw.hfcD.dfifosize);
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s = cs->hw.hfcD.send[cs->hw.hfcD.f1] - cs->hw.hfcD.send[cs->hw.hfcD.f2];
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if (s <= 0)
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s += cs->hw.hfcD.dfifosize;
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s = cs->hw.hfcD.dfifosize - s;
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return (s);
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}
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static int
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ReadZReg(struct IsdnCardState *cs, u_char reg)
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{
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int val;
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WaitNoBusy(cs);
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val = 256 * ReadReg(cs, HFCD_DATA, reg | HFCB_Z_HIGH);
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WaitNoBusy(cs);
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val += ReadReg(cs, HFCD_DATA, reg | HFCB_Z_LOW);
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return (val);
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}
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static struct sk_buff
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*hfc_empty_fifo(struct BCState *bcs, int count)
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{
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u_char *ptr;
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struct sk_buff *skb;
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struct IsdnCardState *cs = bcs->cs;
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int idx;
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int chksum;
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u_char stat, cip;
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if ((cs->debug & L1_DEB_HSCX) && !(cs->debug & L1_DEB_HSCX_FIFO))
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debugl1(cs, "hfc_empty_fifo");
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idx = 0;
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if (count > HSCX_BUFMAX + 3) {
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if (cs->debug & L1_DEB_WARN)
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debugl1(cs, "hfc_empty_fifo: incoming packet too large");
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cip = HFCB_FIFO | HFCB_FIFO_OUT | HFCB_REC | HFCB_CHANNEL(bcs->channel);
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while (idx++ < count) {
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WaitNoBusy(cs);
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ReadReg(cs, HFCD_DATA_NODEB, cip);
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}
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skb = NULL;
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} else if (count < 4) {
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if (cs->debug & L1_DEB_WARN)
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debugl1(cs, "hfc_empty_fifo: incoming packet too small");
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cip = HFCB_FIFO | HFCB_FIFO_OUT | HFCB_REC | HFCB_CHANNEL(bcs->channel);
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#ifdef ERROR_STATISTIC
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bcs->err_inv++;
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#endif
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while ((idx++ < count) && WaitNoBusy(cs))
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ReadReg(cs, HFCD_DATA_NODEB, cip);
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skb = NULL;
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} else if (!(skb = dev_alloc_skb(count - 3)))
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printk(KERN_WARNING "HFC: receive out of memory\n");
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else {
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ptr = skb_put(skb, count - 3);
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idx = 0;
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cip = HFCB_FIFO | HFCB_FIFO_OUT | HFCB_REC | HFCB_CHANNEL(bcs->channel);
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while (idx < (count - 3)) {
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if (!WaitNoBusy(cs))
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break;
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*ptr = ReadReg(cs, HFCD_DATA_NODEB, cip);
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ptr++;
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idx++;
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}
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if (idx != count - 3) {
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debugl1(cs, "RFIFO BUSY error");
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printk(KERN_WARNING "HFC FIFO channel %d BUSY Error\n", bcs->channel);
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dev_kfree_skb_irq(skb);
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skb = NULL;
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} else {
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WaitNoBusy(cs);
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chksum = (ReadReg(cs, HFCD_DATA, cip) << 8);
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WaitNoBusy(cs);
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chksum += ReadReg(cs, HFCD_DATA, cip);
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WaitNoBusy(cs);
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stat = ReadReg(cs, HFCD_DATA, cip);
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if (cs->debug & L1_DEB_HSCX)
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debugl1(cs, "hfc_empty_fifo %d chksum %x stat %x",
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bcs->channel, chksum, stat);
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if (stat) {
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debugl1(cs, "FIFO CRC error");
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dev_kfree_skb_irq(skb);
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skb = NULL;
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#ifdef ERROR_STATISTIC
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bcs->err_crc++;
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#endif
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}
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}
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}
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WaitForBusy(cs);
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WaitNoBusy(cs);
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stat = ReadReg(cs, HFCD_DATA, HFCB_FIFO | HFCB_F2_INC |
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HFCB_REC | HFCB_CHANNEL(bcs->channel));
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WaitForBusy(cs);
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return (skb);
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}
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static void
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hfc_fill_fifo(struct BCState *bcs)
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{
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struct IsdnCardState *cs = bcs->cs;
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int idx, fcnt;
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int count;
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u_char cip;
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if (!bcs->tx_skb)
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return;
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if (bcs->tx_skb->len <= 0)
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return;
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SelFiFo(cs, HFCB_SEND | HFCB_CHANNEL(bcs->channel));
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cip = HFCB_FIFO | HFCB_F1 | HFCB_SEND | HFCB_CHANNEL(bcs->channel);
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WaitNoBusy(cs);
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bcs->hw.hfc.f1 = ReadReg(cs, HFCD_DATA, cip);
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WaitNoBusy(cs);
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cip = HFCB_FIFO | HFCB_F2 | HFCB_SEND | HFCB_CHANNEL(bcs->channel);
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WaitNoBusy(cs);
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bcs->hw.hfc.f2 = ReadReg(cs, HFCD_DATA, cip);
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bcs->hw.hfc.send[bcs->hw.hfc.f1] = ReadZReg(cs, HFCB_FIFO | HFCB_Z1 | HFCB_SEND | HFCB_CHANNEL(bcs->channel));
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if (cs->debug & L1_DEB_HSCX)
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debugl1(cs, "hfc_fill_fifo %d f1(%d) f2(%d) z1(%x)",
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bcs->channel, bcs->hw.hfc.f1, bcs->hw.hfc.f2,
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bcs->hw.hfc.send[bcs->hw.hfc.f1]);
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fcnt = bcs->hw.hfc.f1 - bcs->hw.hfc.f2;
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if (fcnt < 0)
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fcnt += 32;
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if (fcnt > 30) {
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if (cs->debug & L1_DEB_HSCX)
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debugl1(cs, "hfc_fill_fifo more as 30 frames");
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return;
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}
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count = GetFreeFifoBytes_B(bcs);
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if (cs->debug & L1_DEB_HSCX)
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debugl1(cs, "hfc_fill_fifo %d count(%ld/%d),%lx",
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bcs->channel, bcs->tx_skb->len,
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count, current->state);
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if (count < bcs->tx_skb->len) {
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if (cs->debug & L1_DEB_HSCX)
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debugl1(cs, "hfc_fill_fifo no fifo mem");
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return;
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}
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cip = HFCB_FIFO | HFCB_FIFO_IN | HFCB_SEND | HFCB_CHANNEL(bcs->channel);
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idx = 0;
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WaitForBusy(cs);
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WaitNoBusy(cs);
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WriteReg(cs, HFCD_DATA_NODEB, cip, bcs->tx_skb->data[idx++]);
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while (idx < bcs->tx_skb->len) {
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if (!WaitNoBusy(cs))
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break;
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WriteReg(cs, HFCD_DATA_NODEB, cip, bcs->tx_skb->data[idx]);
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idx++;
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}
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if (idx != bcs->tx_skb->len) {
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debugl1(cs, "FIFO Send BUSY error");
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printk(KERN_WARNING "HFC S FIFO channel %d BUSY Error\n", bcs->channel);
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} else {
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bcs->tx_cnt -= bcs->tx_skb->len;
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if (test_bit(FLG_LLI_L1WAKEUP,&bcs->st->lli.flag) &&
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(PACKET_NOACK != bcs->tx_skb->pkt_type)) {
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u_long flags;
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spin_lock_irqsave(&bcs->aclock, flags);
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bcs->ackcnt += bcs->tx_skb->len;
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spin_unlock_irqrestore(&bcs->aclock, flags);
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schedule_event(bcs, B_ACKPENDING);
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}
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dev_kfree_skb_any(bcs->tx_skb);
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bcs->tx_skb = NULL;
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}
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WaitForBusy(cs);
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WaitNoBusy(cs);
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ReadReg(cs, HFCD_DATA, HFCB_FIFO | HFCB_F1_INC | HFCB_SEND | HFCB_CHANNEL(bcs->channel));
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WaitForBusy(cs);
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test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
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return;
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}
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static void
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hfc_send_data(struct BCState *bcs)
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{
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struct IsdnCardState *cs = bcs->cs;
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if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
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hfc_fill_fifo(bcs);
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test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
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} else
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debugl1(cs,"send_data %d blocked", bcs->channel);
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}
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static void
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main_rec_2bds0(struct BCState *bcs)
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{
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struct IsdnCardState *cs = bcs->cs;
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int z1, z2, rcnt;
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u_char f1, f2, cip;
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int receive, count = 5;
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struct sk_buff *skb;
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Begin:
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count--;
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if (test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
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debugl1(cs,"rec_data %d blocked", bcs->channel);
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return;
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}
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SelFiFo(cs, HFCB_REC | HFCB_CHANNEL(bcs->channel));
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cip = HFCB_FIFO | HFCB_F1 | HFCB_REC | HFCB_CHANNEL(bcs->channel);
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WaitNoBusy(cs);
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f1 = ReadReg(cs, HFCD_DATA, cip);
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cip = HFCB_FIFO | HFCB_F2 | HFCB_REC | HFCB_CHANNEL(bcs->channel);
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WaitNoBusy(cs);
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f2 = ReadReg(cs, HFCD_DATA, cip);
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if (f1 != f2) {
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if (cs->debug & L1_DEB_HSCX)
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debugl1(cs, "hfc rec %d f1(%d) f2(%d)",
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bcs->channel, f1, f2);
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z1 = ReadZReg(cs, HFCB_FIFO | HFCB_Z1 | HFCB_REC | HFCB_CHANNEL(bcs->channel));
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z2 = ReadZReg(cs, HFCB_FIFO | HFCB_Z2 | HFCB_REC | HFCB_CHANNEL(bcs->channel));
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rcnt = z1 - z2;
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if (rcnt < 0)
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rcnt += cs->hw.hfcD.bfifosize;
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rcnt++;
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if (cs->debug & L1_DEB_HSCX)
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debugl1(cs, "hfc rec %d z1(%x) z2(%x) cnt(%d)",
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bcs->channel, z1, z2, rcnt);
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if ((skb = hfc_empty_fifo(bcs, rcnt))) {
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skb_queue_tail(&bcs->rqueue, skb);
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schedule_event(bcs, B_RCVBUFREADY);
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}
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rcnt = f1 -f2;
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if (rcnt<0)
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rcnt += 32;
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if (rcnt>1)
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receive = 1;
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else
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receive = 0;
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} else
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receive = 0;
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test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
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if (count && receive)
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goto Begin;
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return;
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}
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static void
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mode_2bs0(struct BCState *bcs, int mode, int bc)
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{
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struct IsdnCardState *cs = bcs->cs;
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if (cs->debug & L1_DEB_HSCX)
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debugl1(cs, "HFCD bchannel mode %d bchan %d/%d",
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mode, bc, bcs->channel);
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bcs->mode = mode;
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bcs->channel = bc;
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switch (mode) {
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case (L1_MODE_NULL):
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if (bc) {
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cs->hw.hfcD.conn |= 0x18;
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cs->hw.hfcD.sctrl &= ~SCTRL_B2_ENA;
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} else {
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cs->hw.hfcD.conn |= 0x3;
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cs->hw.hfcD.sctrl &= ~SCTRL_B1_ENA;
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}
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break;
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case (L1_MODE_TRANS):
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if (bc) {
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cs->hw.hfcD.ctmt |= 2;
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cs->hw.hfcD.conn &= ~0x18;
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cs->hw.hfcD.sctrl |= SCTRL_B2_ENA;
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} else {
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cs->hw.hfcD.ctmt |= 1;
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cs->hw.hfcD.conn &= ~0x3;
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cs->hw.hfcD.sctrl |= SCTRL_B1_ENA;
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}
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break;
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case (L1_MODE_HDLC):
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if (bc) {
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cs->hw.hfcD.ctmt &= ~2;
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cs->hw.hfcD.conn &= ~0x18;
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cs->hw.hfcD.sctrl |= SCTRL_B2_ENA;
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} else {
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cs->hw.hfcD.ctmt &= ~1;
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cs->hw.hfcD.conn &= ~0x3;
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cs->hw.hfcD.sctrl |= SCTRL_B1_ENA;
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}
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break;
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}
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WriteReg(cs, HFCD_DATA, HFCD_SCTRL, cs->hw.hfcD.sctrl);
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WriteReg(cs, HFCD_DATA, HFCD_CTMT, cs->hw.hfcD.ctmt);
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WriteReg(cs, HFCD_DATA, HFCD_CONN, cs->hw.hfcD.conn);
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}
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|
|
static void
|
|
hfc_l2l1(struct PStack *st, int pr, void *arg)
|
|
{
|
|
struct BCState *bcs = st->l1.bcs;
|
|
struct sk_buff *skb = arg;
|
|
u_long flags;
|
|
|
|
switch (pr) {
|
|
case (PH_DATA | REQUEST):
|
|
spin_lock_irqsave(&bcs->cs->lock, flags);
|
|
if (bcs->tx_skb) {
|
|
skb_queue_tail(&bcs->squeue, skb);
|
|
} else {
|
|
bcs->tx_skb = skb;
|
|
// test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
|
|
bcs->cs->BC_Send_Data(bcs);
|
|
}
|
|
spin_unlock_irqrestore(&bcs->cs->lock, flags);
|
|
break;
|
|
case (PH_PULL | INDICATION):
|
|
spin_lock_irqsave(&bcs->cs->lock, flags);
|
|
if (bcs->tx_skb) {
|
|
printk(KERN_WARNING "hfc_l2l1: this shouldn't happen\n");
|
|
} else {
|
|
// test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
|
|
bcs->tx_skb = skb;
|
|
bcs->cs->BC_Send_Data(bcs);
|
|
}
|
|
spin_unlock_irqrestore(&bcs->cs->lock, flags);
|
|
break;
|
|
case (PH_PULL | REQUEST):
|
|
if (!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):
|
|
spin_lock_irqsave(&bcs->cs->lock, flags);
|
|
test_and_set_bit(BC_FLG_ACTIV, &bcs->Flag);
|
|
mode_2bs0(bcs, st->l1.mode, st->l1.bc);
|
|
spin_unlock_irqrestore(&bcs->cs->lock, flags);
|
|
l1_msg_b(st, pr, arg);
|
|
break;
|
|
case (PH_DEACTIVATE | REQUEST):
|
|
l1_msg_b(st, pr, arg);
|
|
break;
|
|
case (PH_DEACTIVATE | CONFIRM):
|
|
spin_lock_irqsave(&bcs->cs->lock, flags);
|
|
test_and_clear_bit(BC_FLG_ACTIV, &bcs->Flag);
|
|
test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
|
|
mode_2bs0(bcs, 0, st->l1.bc);
|
|
spin_unlock_irqrestore(&bcs->cs->lock, flags);
|
|
st->l1.l1l2(st, PH_DEACTIVATE | CONFIRM, NULL);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
close_2bs0(struct BCState *bcs)
|
|
{
|
|
mode_2bs0(bcs, 0, bcs->channel);
|
|
if (test_and_clear_bit(BC_FLG_INIT, &bcs->Flag)) {
|
|
skb_queue_purge(&bcs->rqueue);
|
|
skb_queue_purge(&bcs->squeue);
|
|
if (bcs->tx_skb) {
|
|
dev_kfree_skb_any(bcs->tx_skb);
|
|
bcs->tx_skb = NULL;
|
|
test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int
|
|
open_hfcstate(struct IsdnCardState *cs, struct BCState *bcs)
|
|
{
|
|
if (!test_and_set_bit(BC_FLG_INIT, &bcs->Flag)) {
|
|
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->tx_cnt = 0;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
setstack_2b(struct PStack *st, struct BCState *bcs)
|
|
{
|
|
bcs->channel = st->l1.bc;
|
|
if (open_hfcstate(st->l1.hardware, bcs))
|
|
return (-1);
|
|
st->l1.bcs = bcs;
|
|
st->l2.l2l1 = hfc_l2l1;
|
|
setstack_manager(st);
|
|
bcs->st = st;
|
|
setstack_l1_B(st);
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
hfcd_bh(struct work_struct *work)
|
|
{
|
|
struct IsdnCardState *cs =
|
|
container_of(work, struct IsdnCardState, tqueue);
|
|
|
|
if (test_and_clear_bit(D_L1STATECHANGE, &cs->event)) {
|
|
switch (cs->dc.hfcd.ph_state) {
|
|
case (0):
|
|
l1_msg(cs, HW_RESET | INDICATION, NULL);
|
|
break;
|
|
case (3):
|
|
l1_msg(cs, HW_DEACTIVATE | INDICATION, NULL);
|
|
break;
|
|
case (8):
|
|
l1_msg(cs, HW_RSYNC | INDICATION, NULL);
|
|
break;
|
|
case (6):
|
|
l1_msg(cs, HW_INFO2 | INDICATION, NULL);
|
|
break;
|
|
case (7):
|
|
l1_msg(cs, HW_INFO4_P8 | INDICATION, NULL);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
if (test_and_clear_bit(D_RCVBUFREADY, &cs->event))
|
|
DChannel_proc_rcv(cs);
|
|
if (test_and_clear_bit(D_XMTBUFREADY, &cs->event))
|
|
DChannel_proc_xmt(cs);
|
|
}
|
|
|
|
static
|
|
int receive_dmsg(struct IsdnCardState *cs)
|
|
{
|
|
struct sk_buff *skb;
|
|
int idx;
|
|
int rcnt, z1, z2;
|
|
u_char stat, cip, f1, f2;
|
|
int chksum;
|
|
int count=5;
|
|
u_char *ptr;
|
|
|
|
if (test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
|
|
debugl1(cs, "rec_dmsg blocked");
|
|
return(1);
|
|
}
|
|
SelFiFo(cs, 4 | HFCD_REC);
|
|
cip = HFCD_FIFO | HFCD_F1 | HFCD_REC;
|
|
WaitNoBusy(cs);
|
|
f1 = cs->readisac(cs, cip) & 0xf;
|
|
cip = HFCD_FIFO | HFCD_F2 | HFCD_REC;
|
|
WaitNoBusy(cs);
|
|
f2 = cs->readisac(cs, cip) & 0xf;
|
|
while ((f1 != f2) && count--) {
|
|
z1 = ReadZReg(cs, HFCD_FIFO | HFCD_Z1 | HFCD_REC);
|
|
z2 = ReadZReg(cs, HFCD_FIFO | HFCD_Z2 | HFCD_REC);
|
|
rcnt = z1 - z2;
|
|
if (rcnt < 0)
|
|
rcnt += cs->hw.hfcD.dfifosize;
|
|
rcnt++;
|
|
if (cs->debug & L1_DEB_ISAC)
|
|
debugl1(cs, "hfcd recd f1(%d) f2(%d) z1(%x) z2(%x) cnt(%d)",
|
|
f1, f2, z1, z2, rcnt);
|
|
idx = 0;
|
|
cip = HFCD_FIFO | HFCD_FIFO_OUT | HFCD_REC;
|
|
if (rcnt > MAX_DFRAME_LEN + 3) {
|
|
if (cs->debug & L1_DEB_WARN)
|
|
debugl1(cs, "empty_fifo d: incoming packet too large");
|
|
while (idx < rcnt) {
|
|
if (!(WaitNoBusy(cs)))
|
|
break;
|
|
ReadReg(cs, HFCD_DATA_NODEB, cip);
|
|
idx++;
|
|
}
|
|
} else if (rcnt < 4) {
|
|
if (cs->debug & L1_DEB_WARN)
|
|
debugl1(cs, "empty_fifo d: incoming packet too small");
|
|
while ((idx++ < rcnt) && WaitNoBusy(cs))
|
|
ReadReg(cs, HFCD_DATA_NODEB, cip);
|
|
} else if ((skb = dev_alloc_skb(rcnt - 3))) {
|
|
ptr = skb_put(skb, rcnt - 3);
|
|
while (idx < (rcnt - 3)) {
|
|
if (!(WaitNoBusy(cs)))
|
|
break;
|
|
*ptr = ReadReg(cs, HFCD_DATA_NODEB, cip);
|
|
idx++;
|
|
ptr++;
|
|
}
|
|
if (idx != (rcnt - 3)) {
|
|
debugl1(cs, "RFIFO D BUSY error");
|
|
printk(KERN_WARNING "HFC DFIFO channel BUSY Error\n");
|
|
dev_kfree_skb_irq(skb);
|
|
skb = NULL;
|
|
#ifdef ERROR_STATISTIC
|
|
cs->err_rx++;
|
|
#endif
|
|
} else {
|
|
WaitNoBusy(cs);
|
|
chksum = (ReadReg(cs, HFCD_DATA, cip) << 8);
|
|
WaitNoBusy(cs);
|
|
chksum += ReadReg(cs, HFCD_DATA, cip);
|
|
WaitNoBusy(cs);
|
|
stat = ReadReg(cs, HFCD_DATA, cip);
|
|
if (cs->debug & L1_DEB_ISAC)
|
|
debugl1(cs, "empty_dfifo chksum %x stat %x",
|
|
chksum, stat);
|
|
if (stat) {
|
|
debugl1(cs, "FIFO CRC error");
|
|
dev_kfree_skb_irq(skb);
|
|
skb = NULL;
|
|
#ifdef ERROR_STATISTIC
|
|
cs->err_crc++;
|
|
#endif
|
|
} else {
|
|
skb_queue_tail(&cs->rq, skb);
|
|
schedule_event(cs, D_RCVBUFREADY);
|
|
}
|
|
}
|
|
} else
|
|
printk(KERN_WARNING "HFC: D receive out of memory\n");
|
|
WaitForBusy(cs);
|
|
cip = HFCD_FIFO | HFCD_F2_INC | HFCD_REC;
|
|
WaitNoBusy(cs);
|
|
stat = ReadReg(cs, HFCD_DATA, cip);
|
|
WaitForBusy(cs);
|
|
cip = HFCD_FIFO | HFCD_F2 | HFCD_REC;
|
|
WaitNoBusy(cs);
|
|
f2 = cs->readisac(cs, cip) & 0xf;
|
|
}
|
|
test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
|
|
return(1);
|
|
}
|
|
|
|
static void
|
|
hfc_fill_dfifo(struct IsdnCardState *cs)
|
|
{
|
|
int idx, fcnt;
|
|
int count;
|
|
u_char cip;
|
|
|
|
if (!cs->tx_skb)
|
|
return;
|
|
if (cs->tx_skb->len <= 0)
|
|
return;
|
|
|
|
SelFiFo(cs, 4 | HFCD_SEND);
|
|
cip = HFCD_FIFO | HFCD_F1 | HFCD_SEND;
|
|
WaitNoBusy(cs);
|
|
cs->hw.hfcD.f1 = ReadReg(cs, HFCD_DATA, cip) & 0xf;
|
|
WaitNoBusy(cs);
|
|
cip = HFCD_FIFO | HFCD_F2 | HFCD_SEND;
|
|
cs->hw.hfcD.f2 = ReadReg(cs, HFCD_DATA, cip) & 0xf;
|
|
cs->hw.hfcD.send[cs->hw.hfcD.f1] = ReadZReg(cs, HFCD_FIFO | HFCD_Z1 | HFCD_SEND);
|
|
if (cs->debug & L1_DEB_ISAC)
|
|
debugl1(cs, "hfc_fill_Dfifo f1(%d) f2(%d) z1(%x)",
|
|
cs->hw.hfcD.f1, cs->hw.hfcD.f2,
|
|
cs->hw.hfcD.send[cs->hw.hfcD.f1]);
|
|
fcnt = cs->hw.hfcD.f1 - cs->hw.hfcD.f2;
|
|
if (fcnt < 0)
|
|
fcnt += 16;
|
|
if (fcnt > 14) {
|
|
if (cs->debug & L1_DEB_HSCX)
|
|
debugl1(cs, "hfc_fill_Dfifo more as 14 frames");
|
|
return;
|
|
}
|
|
count = GetFreeFifoBytes_D(cs);
|
|
if (cs->debug & L1_DEB_ISAC)
|
|
debugl1(cs, "hfc_fill_Dfifo count(%ld/%d)",
|
|
cs->tx_skb->len, count);
|
|
if (count < cs->tx_skb->len) {
|
|
if (cs->debug & L1_DEB_ISAC)
|
|
debugl1(cs, "hfc_fill_Dfifo no fifo mem");
|
|
return;
|
|
}
|
|
cip = HFCD_FIFO | HFCD_FIFO_IN | HFCD_SEND;
|
|
idx = 0;
|
|
WaitForBusy(cs);
|
|
WaitNoBusy(cs);
|
|
WriteReg(cs, HFCD_DATA_NODEB, cip, cs->tx_skb->data[idx++]);
|
|
while (idx < cs->tx_skb->len) {
|
|
if (!(WaitNoBusy(cs)))
|
|
break;
|
|
WriteReg(cs, HFCD_DATA_NODEB, cip, cs->tx_skb->data[idx]);
|
|
idx++;
|
|
}
|
|
if (idx != cs->tx_skb->len) {
|
|
debugl1(cs, "DFIFO Send BUSY error");
|
|
printk(KERN_WARNING "HFC S DFIFO channel BUSY Error\n");
|
|
}
|
|
WaitForBusy(cs);
|
|
WaitNoBusy(cs);
|
|
ReadReg(cs, HFCD_DATA, HFCD_FIFO | HFCD_F1_INC | HFCD_SEND);
|
|
dev_kfree_skb_any(cs->tx_skb);
|
|
cs->tx_skb = NULL;
|
|
WaitForBusy(cs);
|
|
return;
|
|
}
|
|
|
|
static
|
|
struct BCState *Sel_BCS(struct IsdnCardState *cs, int channel)
|
|
{
|
|
if (cs->bcs[0].mode && (cs->bcs[0].channel == channel))
|
|
return(&cs->bcs[0]);
|
|
else if (cs->bcs[1].mode && (cs->bcs[1].channel == channel))
|
|
return(&cs->bcs[1]);
|
|
else
|
|
return(NULL);
|
|
}
|
|
|
|
void
|
|
hfc2bds0_interrupt(struct IsdnCardState *cs, u_char val)
|
|
{
|
|
u_char exval;
|
|
struct BCState *bcs;
|
|
int count=15;
|
|
|
|
if (cs->debug & L1_DEB_ISAC)
|
|
debugl1(cs, "HFCD irq %x %s", val,
|
|
test_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags) ?
|
|
"locked" : "unlocked");
|
|
val &= cs->hw.hfcD.int_m1;
|
|
if (val & 0x40) { /* TE state machine irq */
|
|
exval = cs->readisac(cs, HFCD_STATES) & 0xf;
|
|
if (cs->debug & L1_DEB_ISAC)
|
|
debugl1(cs, "ph_state chg %d->%d", cs->dc.hfcd.ph_state,
|
|
exval);
|
|
cs->dc.hfcd.ph_state = exval;
|
|
schedule_event(cs, D_L1STATECHANGE);
|
|
val &= ~0x40;
|
|
}
|
|
while (val) {
|
|
if (test_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
|
|
cs->hw.hfcD.int_s1 |= val;
|
|
return;
|
|
}
|
|
if (cs->hw.hfcD.int_s1 & 0x18) {
|
|
exval = val;
|
|
val = cs->hw.hfcD.int_s1;
|
|
cs->hw.hfcD.int_s1 = exval;
|
|
}
|
|
if (val & 0x08) {
|
|
if (!(bcs=Sel_BCS(cs, 0))) {
|
|
if (cs->debug)
|
|
debugl1(cs, "hfcd spurious 0x08 IRQ");
|
|
} else
|
|
main_rec_2bds0(bcs);
|
|
}
|
|
if (val & 0x10) {
|
|
if (!(bcs=Sel_BCS(cs, 1))) {
|
|
if (cs->debug)
|
|
debugl1(cs, "hfcd spurious 0x10 IRQ");
|
|
} else
|
|
main_rec_2bds0(bcs);
|
|
}
|
|
if (val & 0x01) {
|
|
if (!(bcs=Sel_BCS(cs, 0))) {
|
|
if (cs->debug)
|
|
debugl1(cs, "hfcd spurious 0x01 IRQ");
|
|
} else {
|
|
if (bcs->tx_skb) {
|
|
if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
|
|
hfc_fill_fifo(bcs);
|
|
test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
|
|
} else
|
|
debugl1(cs,"fill_data %d blocked", bcs->channel);
|
|
} else {
|
|
if ((bcs->tx_skb = skb_dequeue(&bcs->squeue))) {
|
|
if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
|
|
hfc_fill_fifo(bcs);
|
|
test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
|
|
} else
|
|
debugl1(cs,"fill_data %d blocked", bcs->channel);
|
|
} else {
|
|
schedule_event(bcs, B_XMTBUFREADY);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (val & 0x02) {
|
|
if (!(bcs=Sel_BCS(cs, 1))) {
|
|
if (cs->debug)
|
|
debugl1(cs, "hfcd spurious 0x02 IRQ");
|
|
} else {
|
|
if (bcs->tx_skb) {
|
|
if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
|
|
hfc_fill_fifo(bcs);
|
|
test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
|
|
} else
|
|
debugl1(cs,"fill_data %d blocked", bcs->channel);
|
|
} else {
|
|
if ((bcs->tx_skb = skb_dequeue(&bcs->squeue))) {
|
|
if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
|
|
hfc_fill_fifo(bcs);
|
|
test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
|
|
} else
|
|
debugl1(cs,"fill_data %d blocked", bcs->channel);
|
|
} else {
|
|
schedule_event(bcs, B_XMTBUFREADY);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (val & 0x20) { /* receive dframe */
|
|
receive_dmsg(cs);
|
|
}
|
|
if (val & 0x04) { /* dframe transmitted */
|
|
if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
|
|
del_timer(&cs->dbusytimer);
|
|
if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
|
|
schedule_event(cs, D_CLEARBUSY);
|
|
if (cs->tx_skb) {
|
|
if (cs->tx_skb->len) {
|
|
if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
|
|
hfc_fill_dfifo(cs);
|
|
test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
|
|
} else {
|
|
debugl1(cs, "hfc_fill_dfifo irq blocked");
|
|
}
|
|
goto afterXPR;
|
|
} else {
|
|
dev_kfree_skb_irq(cs->tx_skb);
|
|
cs->tx_cnt = 0;
|
|
cs->tx_skb = NULL;
|
|
}
|
|
}
|
|
if ((cs->tx_skb = skb_dequeue(&cs->sq))) {
|
|
cs->tx_cnt = 0;
|
|
if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
|
|
hfc_fill_dfifo(cs);
|
|
test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
|
|
} else {
|
|
debugl1(cs, "hfc_fill_dfifo irq blocked");
|
|
}
|
|
} else
|
|
schedule_event(cs, D_XMTBUFREADY);
|
|
}
|
|
afterXPR:
|
|
if (cs->hw.hfcD.int_s1 && count--) {
|
|
val = cs->hw.hfcD.int_s1;
|
|
cs->hw.hfcD.int_s1 = 0;
|
|
if (cs->debug & L1_DEB_ISAC)
|
|
debugl1(cs, "HFCD irq %x loop %d", val, 15-count);
|
|
} else
|
|
val = 0;
|
|
}
|
|
}
|
|
|
|
static void
|
|
HFCD_l1hw(struct PStack *st, int pr, void *arg)
|
|
{
|
|
struct IsdnCardState *cs = (struct IsdnCardState *) st->l1.hardware;
|
|
struct sk_buff *skb = arg;
|
|
u_long flags;
|
|
|
|
switch (pr) {
|
|
case (PH_DATA | REQUEST):
|
|
if (cs->debug & DEB_DLOG_HEX)
|
|
LogFrame(cs, skb->data, skb->len);
|
|
if (cs->debug & DEB_DLOG_VERBOSE)
|
|
dlogframe(cs, skb, 0);
|
|
spin_lock_irqsave(&cs->lock, flags);
|
|
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 {
|
|
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
|
|
if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
|
|
hfc_fill_dfifo(cs);
|
|
test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
|
|
} else
|
|
debugl1(cs, "hfc_fill_dfifo blocked");
|
|
|
|
}
|
|
spin_unlock_irqrestore(&cs->lock, flags);
|
|
break;
|
|
case (PH_PULL | INDICATION):
|
|
spin_lock_irqsave(&cs->lock, flags);
|
|
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);
|
|
spin_unlock_irqrestore(&cs->lock, flags);
|
|
break;
|
|
}
|
|
if (cs->debug & DEB_DLOG_HEX)
|
|
LogFrame(cs, skb->data, skb->len);
|
|
if (cs->debug & DEB_DLOG_VERBOSE)
|
|
dlogframe(cs, skb, 0);
|
|
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
|
|
if (!test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
|
|
hfc_fill_dfifo(cs);
|
|
test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
|
|
} else
|
|
debugl1(cs, "hfc_fill_dfifo blocked");
|
|
spin_unlock_irqrestore(&cs->lock, flags);
|
|
break;
|
|
case (PH_PULL | REQUEST):
|
|
#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 | CONFIRM, NULL);
|
|
} else
|
|
test_and_set_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
|
|
break;
|
|
case (HW_RESET | REQUEST):
|
|
spin_lock_irqsave(&cs->lock, flags);
|
|
cs->writeisac(cs, HFCD_STATES, HFCD_LOAD_STATE | 3); /* HFC ST 3 */
|
|
udelay(6);
|
|
cs->writeisac(cs, HFCD_STATES, 3); /* HFC ST 2 */
|
|
cs->hw.hfcD.mst_m |= HFCD_MASTER;
|
|
cs->writeisac(cs, HFCD_MST_MODE, cs->hw.hfcD.mst_m);
|
|
cs->writeisac(cs, HFCD_STATES, HFCD_ACTIVATE | HFCD_DO_ACTION);
|
|
spin_unlock_irqrestore(&cs->lock, flags);
|
|
l1_msg(cs, HW_POWERUP | CONFIRM, NULL);
|
|
break;
|
|
case (HW_ENABLE | REQUEST):
|
|
spin_lock_irqsave(&cs->lock, flags);
|
|
cs->writeisac(cs, HFCD_STATES, HFCD_ACTIVATE | HFCD_DO_ACTION);
|
|
spin_unlock_irqrestore(&cs->lock, flags);
|
|
break;
|
|
case (HW_DEACTIVATE | REQUEST):
|
|
spin_lock_irqsave(&cs->lock, flags);
|
|
cs->hw.hfcD.mst_m &= ~HFCD_MASTER;
|
|
cs->writeisac(cs, HFCD_MST_MODE, cs->hw.hfcD.mst_m);
|
|
spin_unlock_irqrestore(&cs->lock, flags);
|
|
break;
|
|
case (HW_INFO3 | REQUEST):
|
|
spin_lock_irqsave(&cs->lock, flags);
|
|
cs->hw.hfcD.mst_m |= HFCD_MASTER;
|
|
cs->writeisac(cs, HFCD_MST_MODE, cs->hw.hfcD.mst_m);
|
|
spin_unlock_irqrestore(&cs->lock, flags);
|
|
break;
|
|
default:
|
|
if (cs->debug & L1_DEB_WARN)
|
|
debugl1(cs, "hfcd_l1hw unknown pr %4x", pr);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
setstack_hfcd(struct PStack *st, struct IsdnCardState *cs)
|
|
{
|
|
st->l1.l1hw = HFCD_l1hw;
|
|
}
|
|
|
|
static void
|
|
hfc_dbusy_timer(struct IsdnCardState *cs)
|
|
{
|
|
}
|
|
|
|
static unsigned int
|
|
*init_send_hfcd(int cnt)
|
|
{
|
|
int i;
|
|
unsigned *send;
|
|
|
|
if (!(send = kmalloc(cnt * sizeof(unsigned int), GFP_ATOMIC))) {
|
|
printk(KERN_WARNING
|
|
"HiSax: No memory for hfcd.send\n");
|
|
return(NULL);
|
|
}
|
|
for (i = 0; i < cnt; i++)
|
|
send[i] = 0x1fff;
|
|
return(send);
|
|
}
|
|
|
|
void
|
|
init2bds0(struct IsdnCardState *cs)
|
|
{
|
|
cs->setstack_d = setstack_hfcd;
|
|
if (!cs->hw.hfcD.send)
|
|
cs->hw.hfcD.send = init_send_hfcd(16);
|
|
if (!cs->bcs[0].hw.hfc.send)
|
|
cs->bcs[0].hw.hfc.send = init_send_hfcd(32);
|
|
if (!cs->bcs[1].hw.hfc.send)
|
|
cs->bcs[1].hw.hfc.send = init_send_hfcd(32);
|
|
cs->BC_Send_Data = &hfc_send_data;
|
|
cs->bcs[0].BC_SetStack = setstack_2b;
|
|
cs->bcs[1].BC_SetStack = setstack_2b;
|
|
cs->bcs[0].BC_Close = close_2bs0;
|
|
cs->bcs[1].BC_Close = close_2bs0;
|
|
mode_2bs0(cs->bcs, 0, 0);
|
|
mode_2bs0(cs->bcs + 1, 0, 1);
|
|
}
|
|
|
|
void
|
|
release2bds0(struct IsdnCardState *cs)
|
|
{
|
|
kfree(cs->bcs[0].hw.hfc.send);
|
|
cs->bcs[0].hw.hfc.send = NULL;
|
|
kfree(cs->bcs[1].hw.hfc.send);
|
|
cs->bcs[1].hw.hfc.send = NULL;
|
|
kfree(cs->hw.hfcD.send);
|
|
cs->hw.hfcD.send = NULL;
|
|
}
|
|
|
|
void
|
|
set_cs_func(struct IsdnCardState *cs)
|
|
{
|
|
cs->readisac = &readreghfcd;
|
|
cs->writeisac = &writereghfcd;
|
|
cs->readisacfifo = &dummyf;
|
|
cs->writeisacfifo = &dummyf;
|
|
cs->BC_Read_Reg = &ReadReg;
|
|
cs->BC_Write_Reg = &WriteReg;
|
|
cs->dbusytimer.function = (void *) hfc_dbusy_timer;
|
|
cs->dbusytimer.data = (long) cs;
|
|
init_timer(&cs->dbusytimer);
|
|
INIT_WORK(&cs->tqueue, hfcd_bh);
|
|
}
|