netjet.c

linux 内核源代码

				}
			} else if (state ==  HDLC_FRAME_FOUND) {
				if (val & 1) {
					r_one++;
					if (r_one>6) {
						state=HDLC_ZERO_SEARCH;
						bitcnt=0;
					} else {
						r_val >>= 1;
						r_val |= 0x80;
						bitcnt++;
					}
				} else {
					if (r_one==6) {
						r_val=0; 
						r_one=0;
						bitcnt++;
						if (bitcnt & 7) {
							debugl1(bcs->cs, "tiger: frame not byte aligned");
							state=HDLC_FLAG_SEARCH;
							bcs->hw.tiger.r_err++;
#ifdef ERROR_STATISTIC
							bcs->err_inv++;
#endif
						} else {
							if (bcs->cs->debug & L1_DEB_HSCX)
								debugl1(bcs->cs,"tiger frame end(%d,%d): fcs(%x) i %x",
									i,j,bcs->hw.tiger.r_fcs, bcs->cs->hw.njet.irqstat0);
							if (bcs->hw.tiger.r_fcs == PPP_GOODFCS) {
								got_frame(bcs, (bitcnt>>3)-3);
							} else {
								if (bcs->cs->debug) {
									debugl1(bcs->cs, "tiger FCS error");
									printframe(bcs->cs, bcs->hw.tiger.rcvbuf,
										(bitcnt>>3)-1, "rec");
									bcs->hw.tiger.r_err++;
								}
#ifdef ERROR_STATISTIC
							bcs->err_crc++;
#endif
							}
							state=HDLC_FLAG_FOUND;
						}
						bitcnt=0;
					} else if (r_one==5) {
						val >>= 1;
						r_one=0;
						continue;
					} else {
						r_val >>= 1;
						r_val &= 0x7f;
						bitcnt++;
					}
					r_one=0;	
				}
				if ((state == HDLC_FRAME_FOUND) &&
					!(bitcnt & 7)) {
					if ((bitcnt>>3)>=HSCX_BUFMAX) {
						debugl1(bcs->cs, "tiger: frame too big");
						r_val=0; 
						state=HDLC_FLAG_SEARCH;
						bcs->hw.tiger.r_err++;
#ifdef ERROR_STATISTIC
						bcs->err_inv++;
#endif
					} else {
						bcs->hw.tiger.rcvbuf[(bitcnt>>3)-1] = r_val;
						bcs->hw.tiger.r_fcs = 
							PPP_FCS (bcs->hw.tiger.r_fcs, r_val);
					}
				}
			}
			val >>= 1;
		}
		bcs->hw.tiger.r_tot++;
	}
	bcs->hw.tiger.r_state = state;
	bcs->hw.tiger.r_one = r_one;
	bcs->hw.tiger.r_val = r_val;
	bcs->hw.tiger.r_bitcnt = bitcnt;
}

void read_tiger(struct IsdnCardState *cs) {
	u_int *p;
	int cnt = NETJET_DMA_RXSIZE/2;
	
	if ((cs->hw.njet.irqstat0 & cs->hw.njet.last_is0) & NETJET_IRQM0_READ) {
		debugl1(cs,"tiger warn read double dma %x/%x",
			cs->hw.njet.irqstat0, cs->hw.njet.last_is0);
#ifdef ERROR_STATISTIC
		if (cs->bcs[0].mode)
			cs->bcs[0].err_rdo++;
		if (cs->bcs[1].mode)
			cs->bcs[1].err_rdo++;
#endif
		return;
	} else {
		cs->hw.njet.last_is0 &= ~NETJET_IRQM0_READ;
		cs->hw.njet.last_is0 |= (cs->hw.njet.irqstat0 & NETJET_IRQM0_READ);
	}	
	if (cs->hw.njet.irqstat0 & NETJET_IRQM0_READ_1)
		p = cs->bcs[0].hw.tiger.rec + NETJET_DMA_RXSIZE - 1;
	else
		p = cs->bcs[0].hw.tiger.rec + cnt - 1;
	if ((cs->bcs[0].mode == L1_MODE_HDLC) || (cs->bcs[0].mode == L1_MODE_HDLC_56K))
		read_raw(cs->bcs, p, cnt);

	if ((cs->bcs[1].mode == L1_MODE_HDLC) || (cs->bcs[1].mode == L1_MODE_HDLC_56K))
		read_raw(cs->bcs + 1, p, cnt);
	cs->hw.njet.irqstat0 &= ~NETJET_IRQM0_READ;
}

static void write_raw(struct BCState *bcs, u_int *buf, int cnt);

void netjet_fill_dma(struct BCState *bcs)
{
	register u_int *p, *sp;
	register int cnt;

	if (!bcs->tx_skb)
		return;
	if (bcs->cs->debug & L1_DEB_HSCX)
		debugl1(bcs->cs,"tiger fill_dma1: c%d %4x", bcs->channel,
			bcs->Flag);
	if (test_and_set_bit(BC_FLG_BUSY, &bcs->Flag))
		return;
	if (bcs->mode == L1_MODE_HDLC) { // it's 64k
		if (make_raw_data(bcs))
			return;		
	}
	else { // it's 56k
		if (make_raw_data_56k(bcs))
			return;		
	};
	if (bcs->cs->debug & L1_DEB_HSCX)
		debugl1(bcs->cs,"tiger fill_dma2: c%d %4x", bcs->channel,
			bcs->Flag);
	if (test_and_clear_bit(BC_FLG_NOFRAME, &bcs->Flag)) {
		write_raw(bcs, bcs->hw.tiger.sendp, bcs->hw.tiger.free);
	} else if (test_and_clear_bit(BC_FLG_HALF, &bcs->Flag)) {
		p = bus_to_virt(inl(bcs->cs->hw.njet.base + NETJET_DMA_READ_ADR));
		sp = bcs->hw.tiger.sendp;
		if (p == bcs->hw.tiger.s_end)
			p = bcs->hw.tiger.send -1;
		if (sp == bcs->hw.tiger.s_end)
			sp = bcs->hw.tiger.send -1;
		cnt = p - sp;
		if (cnt <0) {
			write_raw(bcs, bcs->hw.tiger.sendp, bcs->hw.tiger.free);
		} else {
			p++;
			cnt++;
			if (p > bcs->hw.tiger.s_end)
				p = bcs->hw.tiger.send;
			p++;
			cnt++;
			if (p > bcs->hw.tiger.s_end)
				p = bcs->hw.tiger.send;
			write_raw(bcs, p, bcs->hw.tiger.free - cnt);
		}
	} else if (test_and_clear_bit(BC_FLG_EMPTY, &bcs->Flag)) {
		p = bus_to_virt(inl(bcs->cs->hw.njet.base + NETJET_DMA_READ_ADR));
		cnt = bcs->hw.tiger.s_end - p;
		if (cnt < 2) {
			p = bcs->hw.tiger.send + 1;
			cnt = NETJET_DMA_TXSIZE/2 - 2;
		} else {
			p++;
			p++;
			if (cnt <= (NETJET_DMA_TXSIZE/2))
				cnt += NETJET_DMA_TXSIZE/2;
			cnt--;
			cnt--;
		}
		write_raw(bcs, p, cnt);
	}
	if (bcs->cs->debug & L1_DEB_HSCX)
		debugl1(bcs->cs,"tiger fill_dma3: c%d %4x", bcs->channel,
			bcs->Flag);
}

static void write_raw(struct BCState *bcs, u_int *buf, int cnt) {
	u_int mask, val, *p=buf;
	u_int i, s_cnt;
        
        if (cnt <= 0)
        	return;
	if (test_bit(BC_FLG_BUSY, &bcs->Flag)) {
		if (bcs->hw.tiger.sendcnt> cnt) {
			s_cnt = cnt;
			bcs->hw.tiger.sendcnt -= cnt;
		} else {
			s_cnt = bcs->hw.tiger.sendcnt;
			bcs->hw.tiger.sendcnt = 0;
		}
		if (bcs->channel)
			mask = 0xffff00ff;
		else
			mask = 0xffffff00;
		for (i=0; i<s_cnt; i++) {
			val = bcs->channel ? ((bcs->hw.tiger.sp[i] <<8) & 0xff00) :
				(bcs->hw.tiger.sp[i]);
			*p   &= mask;
			*p++ |= val;
			if (p>bcs->hw.tiger.s_end)
				p = bcs->hw.tiger.send;
		}
		bcs->hw.tiger.s_tot += s_cnt;
		if (bcs->cs->debug & L1_DEB_HSCX)
			debugl1(bcs->cs,"tiger write_raw: c%d %p-%p %d/%d %d %x", bcs->channel,
				buf, p, s_cnt, cnt,
				bcs->hw.tiger.sendcnt, bcs->cs->hw.njet.irqstat0);
		if (bcs->cs->debug & L1_DEB_HSCX_FIFO)
			printframe(bcs->cs, bcs->hw.tiger.sp, s_cnt, "snd");
		bcs->hw.tiger.sp += s_cnt;
		bcs->hw.tiger.sendp = p;
		if (!bcs->hw.tiger.sendcnt) {
			if (!bcs->tx_skb) {
				debugl1(bcs->cs,"tiger write_raw: NULL skb s_cnt %d", s_cnt);
			} else {
				if (test_bit(FLG_LLI_L1WAKEUP,&bcs->st->lli.flag) &&
					(PACKET_NOACK != bcs->tx_skb->pkt_type)) {
					u_long	flags;
					spin_lock_irqsave(&bcs->aclock, flags);
					bcs->ackcnt += bcs->tx_skb->len;
					spin_unlock_irqrestore(&bcs->aclock, flags);
					schedule_event(bcs, B_ACKPENDING);
				}
				dev_kfree_skb_any(bcs->tx_skb);
				bcs->tx_skb = NULL;
			}
			test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
			bcs->hw.tiger.free = cnt - s_cnt;
			if (bcs->hw.tiger.free > (NETJET_DMA_TXSIZE/2))
				test_and_set_bit(BC_FLG_HALF, &bcs->Flag);
			else {
				test_and_clear_bit(BC_FLG_HALF, &bcs->Flag);
				test_and_set_bit(BC_FLG_NOFRAME, &bcs->Flag);
			}
			if ((bcs->tx_skb = skb_dequeue(&bcs->squeue))) {
				netjet_fill_dma(bcs);
			} else {
				mask ^= 0xffffffff;
				if (s_cnt < cnt) {
					for (i=s_cnt; i<cnt;i++) {
						*p++ |= mask;
						if (p>bcs->hw.tiger.s_end)
							p = bcs->hw.tiger.send;
					}
					if (bcs->cs->debug & L1_DEB_HSCX)
						debugl1(bcs->cs, "tiger write_raw: fill rest %d",
							cnt - s_cnt);
				}
				test_and_set_bit(B_XMTBUFREADY, &bcs->event);
				schedule_work(&bcs->tqueue);
			}
		}
	} else if (test_and_clear_bit(BC_FLG_NOFRAME, &bcs->Flag)) {
		test_and_set_bit(BC_FLG_HALF, &bcs->Flag);
		fill_mem(bcs, buf, cnt, bcs->channel, 0xff);
		bcs->hw.tiger.free += cnt;
		if (bcs->cs->debug & L1_DEB_HSCX)
			debugl1(bcs->cs,"tiger write_raw: fill half");
	} else if (test_and_clear_bit(BC_FLG_HALF, &bcs->Flag)) {
		test_and_set_bit(BC_FLG_EMPTY, &bcs->Flag);
		fill_mem(bcs, buf, cnt, bcs->channel, 0xff);
		if (bcs->cs->debug & L1_DEB_HSCX)
			debugl1(bcs->cs,"tiger write_raw: fill full");
	}
}

void write_tiger(struct IsdnCardState *cs) {
	u_int *p, cnt = NETJET_DMA_TXSIZE/2;
	
	if ((cs->hw.njet.irqstat0 & cs->hw.njet.last_is0) & NETJET_IRQM0_WRITE) {
		debugl1(cs,"tiger warn write double dma %x/%x",
			cs->hw.njet.irqstat0, cs->hw.njet.last_is0);
#ifdef ERROR_STATISTIC
		if (cs->bcs[0].mode)
			cs->bcs[0].err_tx++;
		if (cs->bcs[1].mode)
			cs->bcs[1].err_tx++;
#endif
		return;
	} else {
		cs->hw.njet.last_is0 &= ~NETJET_IRQM0_WRITE;
		cs->hw.njet.last_is0 |= (cs->hw.njet.irqstat0 & NETJET_IRQM0_WRITE);
	}	
	if (cs->hw.njet.irqstat0  & NETJET_IRQM0_WRITE_1)
		p = cs->bcs[0].hw.tiger.send + NETJET_DMA_TXSIZE - 1;
	else
		p = cs->bcs[0].hw.tiger.send + cnt - 1;
	if ((cs->bcs[0].mode == L1_MODE_HDLC) || (cs->bcs[0].mode == L1_MODE_HDLC_56K))
		write_raw(cs->bcs, p, cnt);
	if ((cs->bcs[1].mode == L1_MODE_HDLC) || (cs->bcs[1].mode == L1_MODE_HDLC_56K))
		write_raw(cs->bcs + 1, p, cnt);
	cs->hw.njet.irqstat0 &= ~NETJET_IRQM0_WRITE;
}

static void
tiger_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;
				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 "tiger_l2l1: this shouldn't happen\n");
			} else {
				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_tiger(bcs, st->l1.mode, st->l1.bc);
			/* 2001/10/04 Christoph Ersfeld, Formula-n Europe AG */
			spin_unlock_irqrestore(&bcs->cs->lock, flags);
			bcs->cs->cardmsg(bcs->cs, MDL_BC_ASSIGN, (void *)(&st->l1.bc));
			l1_msg_b(st, pr, arg);
			break;
		case (PH_DEACTIVATE | REQUEST):
			/* 2001/10/04 Christoph Ersfeld, Formula-n Europe AG */
			bcs->cs->cardmsg(bcs->cs, MDL_BC_RELEASE, (void *)(&st->l1.bc));
			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_tiger(bcs, 0, st->l1.bc);
			spin_unlock_irqrestore(&bcs->cs->lock, flags);
			st->l1.l1l2(st, PH_DEACTIVATE | CONFIRM, NULL);
			break;
	}
}


static void
close_tigerstate(struct BCState *bcs)
{
	mode_tiger(bcs, 0, bcs->channel);
	if (test_and_clear_bit(BC_FLG_INIT, &bcs->Flag)) {
		kfree(bcs->hw.tiger.rcvbuf);
		bcs->hw.tiger.rcvbuf = NULL;
		kfree(bcs->hw.tiger.sendbuf);
		bcs->hw.tiger.sendbuf = NULL;
		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_tigerstate(struct IsdnCardState *cs, struct BCState *bcs)
{
	if (!test_and_set_bit(BC_FLG_INIT, &bcs->Flag)) {
		if (!(bcs->hw.tiger.rcvbuf = kmalloc(HSCX_BUFMAX, GFP_ATOMIC))) {
			printk(KERN_WARNING
			       "HiSax: No memory for tiger.rcvbuf\n");
			return (1);
		}
		if (!(bcs->hw.tiger.sendbuf = kmalloc(RAW_BUFMAX, GFP_ATOMIC))) {
			printk(KERN_WARNING
			       "HiSax: No memory for tiger.sendbuf\n");
			return (1);
		}
		skb_queue_head_init(&bcs->rqueue);
		skb_queue_head_init(&bcs->squeue);
	}
	bcs->tx_skb = NULL;
	bcs->hw.tiger.sendcnt = 0;
	test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
	bcs->event = 0;
	bcs->tx_cnt = 0;
	return (0);
}

static int
setstack_tiger(struct PStack *st, struct BCState *bcs)
{
	bcs->channel = st->l1.bc;
	if (open_tigerstate(st->l1.hardware, bcs))
		return (-1);
	st->l1.bcs = bcs;
	st->l2.l2l1 = tiger_l2l1;
	setstack_manager(st);
	bcs->st = st;
	setstack_l1_B(st);
	return (0);
}

 
void
inittiger(struct IsdnCardState *cs)
{
	if (!(cs->bcs[0].hw.tiger.send = kmalloc(NETJET_DMA_TXSIZE * sizeof(unsigned int),
		GFP_KERNEL | GFP_DMA))) {
		printk(KERN_WARNING
		       "HiSax: No memory for tiger.send\n");
		return;
	}
	cs->bcs[0].hw.tiger.s_irq = cs->bcs[0].hw.tiger.send + NETJET_DMA_TXSIZE/2 - 1;
	cs->bcs[0].hw.tiger.s_end = cs->bcs[0].hw.tiger.send + NETJET_DMA_TXSIZE - 1;
	cs->bcs[1].hw.tiger.send = cs->bcs[0].hw.tiger.send;
	cs->bcs[1].hw.tiger.s_irq = cs->bcs[0].hw.tiger.s_irq;
	cs->bcs[1].hw.tiger.s_end = cs->bcs[0].hw.tiger.s_end;
	
	memset(cs->bcs[0].hw.tiger.send, 0xff, NETJET_DMA_TXSIZE * sizeof(unsigned int));
	debugl1(cs, "tiger: send buf %p - %p", cs->bcs[0].hw.tiger.send,
		cs->bcs[0].hw.tiger.send + NETJET_DMA_TXSIZE - 1);
	outl(virt_to_bus(cs->bcs[0].hw.tiger.send),
		cs->hw.njet.base + NETJET_DMA_READ_START);
	outl(virt_to_bus(cs->bcs[0].hw.tiger.s_irq),
		cs->hw.njet.base + NETJET_DMA_READ_IRQ);
	outl(virt_to_bus(cs->bcs[0].hw.tiger.s_end),
		cs->hw.njet.base + NETJET_DMA_READ_END);
	if (!(cs->bcs[0].hw.tiger.rec = kmalloc(NETJET_DMA_RXSIZE * sizeof(unsigned int),
		GFP_KERNEL | GFP_DMA))) {
		printk(KERN_WARNING
		       "HiSax: No memory for tiger.rec\n");
		return;
	}
	debugl1(cs, "tiger: rec buf %p - %p", cs->bcs[0].hw.tiger.rec,
		cs->bcs[0].hw.tiger.rec + NETJET_DMA_RXSIZE - 1);
	cs->bcs[1].hw.tiger.rec = cs->bcs[0].hw.tiger.rec;
	memset(cs->bcs[0].hw.tiger.rec, 0xff, NETJET_DMA_RXSIZE * sizeof(unsigned int));
	outl(virt_to_bus(cs->bcs[0].hw.tiger.rec),
		cs->hw.njet.base + NETJET_DMA_WRITE_START);
	outl(virt_to_bus(cs->bcs[0].hw.tiger.rec + NETJET_DMA_RXSIZE/2 - 1),
		cs->hw.njet.base + NETJET_DMA_WRITE_IRQ);
	outl(virt_to_bus(cs->bcs[0].hw.tiger.rec + NETJET_DMA_RXSIZE - 1),
		cs->hw.njet.base + NETJET_DMA_WRITE_END);
	debugl1(cs, "tiger: dmacfg  %x/%x  pulse=%d",
		inl(cs->hw.njet.base + NETJET_DMA_WRITE_ADR),
		inl(cs->hw.njet.base + NETJET_DMA_READ_ADR),
		bytein(cs->hw.njet.base + NETJET_PULSE_CNT));
	cs->hw.njet.last_is0 = 0;
	cs->bcs[0].BC_SetStack = setstack_tiger;
	cs->bcs[1].BC_SetStack = setstack_tiger;
	cs->bcs[0].BC_Close = close_tigerstate;
	cs->bcs[1].BC_Close = close_tigerstate;
}

static void
releasetiger(struct IsdnCardState *cs)
{
	kfree(cs->bcs[0].hw.tiger.send);
	cs->bcs[0].hw.tiger.send = NULL;
	cs->bcs[1].hw.tiger.send = NULL;
	kfree(cs->bcs[0].hw.tiger.rec);
	cs->bcs[0].hw.tiger.rec = NULL;
	cs->bcs[1].hw.tiger.rec = NULL;
}

void
release_io_netjet(struct IsdnCardState *cs)
{
	byteout(cs->hw.njet.base + NETJET_IRQMASK0, 0);
	byteout(cs->hw.njet.base + NETJET_IRQMASK1, 0);
	releasetiger(cs);
	release_region(cs->hw.njet.base, 256);
}