diff options
Diffstat (limited to 'drivers/isdn/hisax/hfc_2bs0.c')
| -rw-r--r-- | drivers/isdn/hisax/hfc_2bs0.c | 591 |
1 files changed, 0 insertions, 591 deletions
diff --git a/drivers/isdn/hisax/hfc_2bs0.c b/drivers/isdn/hisax/hfc_2bs0.c deleted file mode 100644 index 34d59992839a..000000000000 --- a/drivers/isdn/hisax/hfc_2bs0.c +++ /dev/null @@ -1,591 +0,0 @@ -/* $Id: hfc_2bs0.c,v 1.20.2.6 2004/02/11 13:21:33 keil Exp $ - * - * specific routines for CCD's HFC 2BS0 - * - * Author Karsten Keil - * Copyright by Karsten Keil <keil@isdn4linux.de> - * - * This software may be used and distributed according to the terms - * of the GNU General Public License, incorporated herein by reference. - * - */ - -#include <linux/init.h> -#include "hisax.h" -#include "hfc_2bs0.h" -#include "isac.h" -#include "isdnl1.h" -#include <linux/interrupt.h> -#include <linux/slab.h> - -static inline int -WaitForBusy(struct IsdnCardState *cs) -{ - int to = 130; - u_char val; - - while (!(cs->BC_Read_Reg(cs, HFC_STATUS, 0) & HFC_BUSY) && to) { - val = cs->BC_Read_Reg(cs, HFC_DATA, HFC_CIP | HFC_F2 | - (cs->hw.hfc.cip & 3)); - udelay(1); - to--; - } - if (!to) { - printk(KERN_WARNING "HiSax: %s timeout\n", __func__); - return (0); - } else - return (to); -} - -static inline int -WaitNoBusy(struct IsdnCardState *cs) -{ - int to = 125; - - while ((cs->BC_Read_Reg(cs, HFC_STATUS, 0) & HFC_BUSY) && to) { - udelay(1); - to--; - } - if (!to) { - printk(KERN_WARNING "HiSax: waitforBusy timeout\n"); - return (0); - } else - return (to); -} - -static int -GetFreeFifoBytes(struct BCState *bcs) -{ - int s; - - if (bcs->hw.hfc.f1 == bcs->hw.hfc.f2) - return (bcs->cs->hw.hfc.fifosize); - s = bcs->hw.hfc.send[bcs->hw.hfc.f1] - bcs->hw.hfc.send[bcs->hw.hfc.f2]; - if (s <= 0) - s += bcs->cs->hw.hfc.fifosize; - s = bcs->cs->hw.hfc.fifosize - s; - return (s); -} - -static int -ReadZReg(struct BCState *bcs, u_char reg) -{ - int val; - - WaitNoBusy(bcs->cs); - val = 256 * bcs->cs->BC_Read_Reg(bcs->cs, HFC_DATA, reg | HFC_CIP | HFC_Z_HIGH); - WaitNoBusy(bcs->cs); - val += bcs->cs->BC_Read_Reg(bcs->cs, HFC_DATA, reg | HFC_CIP | HFC_Z_LOW); - return (val); -} - -static void -hfc_clear_fifo(struct BCState *bcs) -{ - struct IsdnCardState *cs = bcs->cs; - int idx, cnt; - int rcnt, z1, z2; - u_char cip, f1, f2; - - if ((cs->debug & L1_DEB_HSCX) && !(cs->debug & L1_DEB_HSCX_FIFO)) - debugl1(cs, "hfc_clear_fifo"); - cip = HFC_CIP | HFC_F1 | HFC_REC | HFC_CHANNEL(bcs->channel); - if ((cip & 0xc3) != (cs->hw.hfc.cip & 0xc3)) { - cs->BC_Write_Reg(cs, HFC_STATUS, cip, cip); - WaitForBusy(cs); - } - WaitNoBusy(cs); - f1 = cs->BC_Read_Reg(cs, HFC_DATA, cip); - cip = HFC_CIP | HFC_F2 | HFC_REC | HFC_CHANNEL(bcs->channel); - WaitNoBusy(cs); - f2 = cs->BC_Read_Reg(cs, HFC_DATA, cip); - z1 = ReadZReg(bcs, HFC_Z1 | HFC_REC | HFC_CHANNEL(bcs->channel)); - z2 = ReadZReg(bcs, HFC_Z2 | HFC_REC | HFC_CHANNEL(bcs->channel)); - cnt = 32; - while (((f1 != f2) || (z1 != z2)) && cnt--) { - if (cs->debug & L1_DEB_HSCX) - debugl1(cs, "hfc clear %d f1(%d) f2(%d)", - bcs->channel, f1, f2); - rcnt = z1 - z2; - if (rcnt < 0) - rcnt += cs->hw.hfc.fifosize; - if (rcnt) - rcnt++; - if (cs->debug & L1_DEB_HSCX) - debugl1(cs, "hfc clear %d z1(%x) z2(%x) cnt(%d)", - bcs->channel, z1, z2, rcnt); - cip = HFC_CIP | HFC_FIFO_OUT | HFC_REC | HFC_CHANNEL(bcs->channel); - idx = 0; - while ((idx < rcnt) && WaitNoBusy(cs)) { - cs->BC_Read_Reg(cs, HFC_DATA_NODEB, cip); - idx++; - } - if (f1 != f2) { - WaitNoBusy(cs); - cs->BC_Read_Reg(cs, HFC_DATA, HFC_CIP | HFC_F2_INC | HFC_REC | - HFC_CHANNEL(bcs->channel)); - WaitForBusy(cs); - } - cip = HFC_CIP | HFC_F1 | HFC_REC | HFC_CHANNEL(bcs->channel); - WaitNoBusy(cs); - f1 = cs->BC_Read_Reg(cs, HFC_DATA, cip); - cip = HFC_CIP | HFC_F2 | HFC_REC | HFC_CHANNEL(bcs->channel); - WaitNoBusy(cs); - f2 = cs->BC_Read_Reg(cs, HFC_DATA, cip); - z1 = ReadZReg(bcs, HFC_Z1 | HFC_REC | HFC_CHANNEL(bcs->channel)); - z2 = ReadZReg(bcs, HFC_Z2 | HFC_REC | HFC_CHANNEL(bcs->channel)); - } - return; -} - - -static struct sk_buff -* -hfc_empty_fifo(struct BCState *bcs, int count) -{ - u_char *ptr; - struct sk_buff *skb; - struct IsdnCardState *cs = bcs->cs; - int idx; - int chksum; - u_char stat, cip; - - if ((cs->debug & L1_DEB_HSCX) && !(cs->debug & L1_DEB_HSCX_FIFO)) - debugl1(cs, "hfc_empty_fifo"); - idx = 0; - if (count > HSCX_BUFMAX + 3) { - if (cs->debug & L1_DEB_WARN) - debugl1(cs, "hfc_empty_fifo: incoming packet too large"); - cip = HFC_CIP | HFC_FIFO_OUT | HFC_REC | HFC_CHANNEL(bcs->channel); - while ((idx++ < count) && WaitNoBusy(cs)) - cs->BC_Read_Reg(cs, HFC_DATA_NODEB, cip); - WaitNoBusy(cs); - stat = cs->BC_Read_Reg(cs, HFC_DATA, HFC_CIP | HFC_F2_INC | HFC_REC | - HFC_CHANNEL(bcs->channel)); - WaitForBusy(cs); - return (NULL); - } - if ((count < 4) && (bcs->mode != L1_MODE_TRANS)) { - if (cs->debug & L1_DEB_WARN) - debugl1(cs, "hfc_empty_fifo: incoming packet too small"); - cip = HFC_CIP | HFC_FIFO_OUT | HFC_REC | HFC_CHANNEL(bcs->channel); - while ((idx++ < count) && WaitNoBusy(cs)) - cs->BC_Read_Reg(cs, HFC_DATA_NODEB, cip); - WaitNoBusy(cs); - stat = cs->BC_Read_Reg(cs, HFC_DATA, HFC_CIP | HFC_F2_INC | HFC_REC | - HFC_CHANNEL(bcs->channel)); - WaitForBusy(cs); -#ifdef ERROR_STATISTIC - bcs->err_inv++; -#endif - return (NULL); - } - if (bcs->mode == L1_MODE_TRANS) - count -= 1; - else - count -= 3; - if (!(skb = dev_alloc_skb(count))) - printk(KERN_WARNING "HFC: receive out of memory\n"); - else { - ptr = skb_put(skb, count); - idx = 0; - cip = HFC_CIP | HFC_FIFO_OUT | HFC_REC | HFC_CHANNEL(bcs->channel); - while ((idx < count) && WaitNoBusy(cs)) { - *ptr++ = cs->BC_Read_Reg(cs, HFC_DATA_NODEB, cip); - idx++; - } - if (idx != count) { - debugl1(cs, "RFIFO BUSY error"); - printk(KERN_WARNING "HFC FIFO channel %d BUSY Error\n", bcs->channel); - dev_kfree_skb_any(skb); - if (bcs->mode != L1_MODE_TRANS) { - WaitNoBusy(cs); - stat = cs->BC_Read_Reg(cs, HFC_DATA, HFC_CIP | HFC_F2_INC | HFC_REC | - HFC_CHANNEL(bcs->channel)); - WaitForBusy(cs); - } - return (NULL); - } - if (bcs->mode != L1_MODE_TRANS) { - WaitNoBusy(cs); - chksum = (cs->BC_Read_Reg(cs, HFC_DATA, cip) << 8); - WaitNoBusy(cs); - chksum += cs->BC_Read_Reg(cs, HFC_DATA, cip); - WaitNoBusy(cs); - stat = cs->BC_Read_Reg(cs, HFC_DATA, cip); - if (cs->debug & L1_DEB_HSCX) - debugl1(cs, "hfc_empty_fifo %d chksum %x stat %x", - bcs->channel, chksum, stat); - if (stat) { - debugl1(cs, "FIFO CRC error"); - dev_kfree_skb_any(skb); - skb = NULL; -#ifdef ERROR_STATISTIC - bcs->err_crc++; -#endif - } - WaitNoBusy(cs); - stat = cs->BC_Read_Reg(cs, HFC_DATA, HFC_CIP | HFC_F2_INC | HFC_REC | - HFC_CHANNEL(bcs->channel)); - WaitForBusy(cs); - } - } - return (skb); -} - -static void -hfc_fill_fifo(struct BCState *bcs) -{ - struct IsdnCardState *cs = bcs->cs; - int idx, fcnt; - int count; - int z1, z2; - u_char cip; - - if (!bcs->tx_skb) - return; - if (bcs->tx_skb->len <= 0) - return; - - cip = HFC_CIP | HFC_F1 | HFC_SEND | HFC_CHANNEL(bcs->channel); - if ((cip & 0xc3) != (cs->hw.hfc.cip & 0xc3)) { - cs->BC_Write_Reg(cs, HFC_STATUS, cip, cip); - WaitForBusy(cs); - } - WaitNoBusy(cs); - if (bcs->mode != L1_MODE_TRANS) { - bcs->hw.hfc.f1 = cs->BC_Read_Reg(cs, HFC_DATA, cip); - cip = HFC_CIP | HFC_F2 | HFC_SEND | HFC_CHANNEL(bcs->channel); - WaitNoBusy(cs); - bcs->hw.hfc.f2 = cs->BC_Read_Reg(cs, HFC_DATA, cip); - bcs->hw.hfc.send[bcs->hw.hfc.f1] = ReadZReg(bcs, HFC_Z1 | HFC_SEND | HFC_CHANNEL(bcs->channel)); - if (cs->debug & L1_DEB_HSCX) - debugl1(cs, "hfc_fill_fifo %d f1(%d) f2(%d) z1(%x)", - bcs->channel, bcs->hw.hfc.f1, bcs->hw.hfc.f2, - bcs->hw.hfc.send[bcs->hw.hfc.f1]); - fcnt = bcs->hw.hfc.f1 - bcs->hw.hfc.f2; - if (fcnt < 0) - fcnt += 32; - if (fcnt > 30) { - if (cs->debug & L1_DEB_HSCX) - debugl1(cs, "hfc_fill_fifo more as 30 frames"); - return; - } - count = GetFreeFifoBytes(bcs); - } - else { - WaitForBusy(cs); - z1 = ReadZReg(bcs, HFC_Z1 | HFC_REC | HFC_CHANNEL(bcs->channel)); - z2 = ReadZReg(bcs, HFC_Z2 | HFC_REC | HFC_CHANNEL(bcs->channel)); - count = z1 - z2; - if (count < 0) - count += cs->hw.hfc.fifosize; - } /* L1_MODE_TRANS */ - if (cs->debug & L1_DEB_HSCX) - debugl1(cs, "hfc_fill_fifo %d count(%u/%d)", - bcs->channel, bcs->tx_skb->len, - count); - if (count < bcs->tx_skb->len) { - if (cs->debug & L1_DEB_HSCX) - debugl1(cs, "hfc_fill_fifo no fifo mem"); - return; - } - cip = HFC_CIP | HFC_FIFO_IN | HFC_SEND | HFC_CHANNEL(bcs->channel); - idx = 0; - while ((idx < bcs->tx_skb->len) && WaitNoBusy(cs)) - cs->BC_Write_Reg(cs, HFC_DATA_NODEB, cip, bcs->tx_skb->data[idx++]); - if (idx != bcs->tx_skb->len) { - debugl1(cs, "FIFO Send BUSY error"); - printk(KERN_WARNING "HFC S FIFO channel %d BUSY Error\n", bcs->channel); - } else { - count = bcs->tx_skb->len; - bcs->tx_cnt -= count; - if (PACKET_NOACK == bcs->tx_skb->pkt_type) - count = -1; - dev_kfree_skb_any(bcs->tx_skb); - bcs->tx_skb = NULL; - if (bcs->mode != L1_MODE_TRANS) { - WaitForBusy(cs); - WaitNoBusy(cs); - cs->BC_Read_Reg(cs, HFC_DATA, HFC_CIP | HFC_F1_INC | HFC_SEND | HFC_CHANNEL(bcs->channel)); - } - if (test_bit(FLG_LLI_L1WAKEUP, &bcs->st->lli.flag) && - (count >= 0)) { - u_long flags; - spin_lock_irqsave(&bcs->aclock, flags); - bcs->ackcnt += count; - spin_unlock_irqrestore(&bcs->aclock, flags); - schedule_event(bcs, B_ACKPENDING); - } - test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag); - } - return; -} - -void -main_irq_hfc(struct BCState *bcs) -{ - struct IsdnCardState *cs = bcs->cs; - int z1, z2, rcnt; - u_char f1, f2, cip; - int receive, transmit, count = 5; - struct sk_buff *skb; - -Begin: - count--; - cip = HFC_CIP | HFC_F1 | HFC_REC | HFC_CHANNEL(bcs->channel); - if ((cip & 0xc3) != (cs->hw.hfc.cip & 0xc3)) { - cs->BC_Write_Reg(cs, HFC_STATUS, cip, cip); - WaitForBusy(cs); - } - WaitNoBusy(cs); - receive = 0; - if (bcs->mode == L1_MODE_HDLC) { - f1 = cs->BC_Read_Reg(cs, HFC_DATA, cip); - cip = HFC_CIP | HFC_F2 | HFC_REC | HFC_CHANNEL(bcs->channel); - WaitNoBusy(cs); - f2 = cs->BC_Read_Reg(cs, HFC_DATA, cip); - if (f1 != f2) { - if (cs->debug & L1_DEB_HSCX) - debugl1(cs, "hfc rec %d f1(%d) f2(%d)", - bcs->channel, f1, f2); - receive = 1; - } - } - if (receive || (bcs->mode == L1_MODE_TRANS)) { - WaitForBusy(cs); - z1 = ReadZReg(bcs, HFC_Z1 | HFC_REC | HFC_CHANNEL(bcs->channel)); - z2 = ReadZReg(bcs, HFC_Z2 | HFC_REC | HFC_CHANNEL(bcs->channel)); - rcnt = z1 - z2; - if (rcnt < 0) - rcnt += cs->hw.hfc.fifosize; - if ((bcs->mode == L1_MODE_HDLC) || (rcnt)) { - rcnt++; - if (cs->debug & L1_DEB_HSCX) - debugl1(cs, "hfc rec %d z1(%x) z2(%x) cnt(%d)", - bcs->channel, z1, z2, rcnt); - /* sti(); */ - if ((skb = hfc_empty_fifo(bcs, rcnt))) { - skb_queue_tail(&bcs->rqueue, skb); - schedule_event(bcs, B_RCVBUFREADY); - } - } - receive = 1; - } - if (bcs->tx_skb) { - transmit = 1; - test_and_set_bit(BC_FLG_BUSY, &bcs->Flag); - hfc_fill_fifo(bcs); - if (test_bit(BC_FLG_BUSY, &bcs->Flag)) - transmit = 0; - } else { - if ((bcs->tx_skb = skb_dequeue(&bcs->squeue))) { - transmit = 1; - test_and_set_bit(BC_FLG_BUSY, &bcs->Flag); - hfc_fill_fifo(bcs); - if (test_bit(BC_FLG_BUSY, &bcs->Flag)) - transmit = 0; - } else { - transmit = 0; - schedule_event(bcs, B_XMTBUFREADY); - } - } - if ((receive || transmit) && count) - goto Begin; - return; -} - -static void -mode_hfc(struct BCState *bcs, int mode, int bc) -{ - struct IsdnCardState *cs = bcs->cs; - - if (cs->debug & L1_DEB_HSCX) - debugl1(cs, "HFC 2BS0 mode %d bchan %d/%d", - mode, bc, bcs->channel); - bcs->mode = mode; - bcs->channel = bc; - - switch (mode) { - case (L1_MODE_NULL): - if (bc) { - cs->hw.hfc.ctmt &= ~1; - cs->hw.hfc.isac_spcr &= ~0x03; - } - else { - cs->hw.hfc.ctmt &= ~2; - cs->hw.hfc.isac_spcr &= ~0x0c; - } - break; - case (L1_MODE_TRANS): - cs->hw.hfc.ctmt &= ~(1 << bc); /* set HDLC mode */ - cs->BC_Write_Reg(cs, HFC_STATUS, cs->hw.hfc.ctmt, cs->hw.hfc.ctmt); - hfc_clear_fifo(bcs); /* complete fifo clear */ - if (bc) { - cs->hw.hfc.ctmt |= 1; - cs->hw.hfc.isac_spcr &= ~0x03; - cs->hw.hfc.isac_spcr |= 0x02; - } else { - cs->hw.hfc.ctmt |= 2; - cs->hw.hfc.isac_spcr &= ~0x0c; - cs->hw.hfc.isac_spcr |= 0x08; - } - break; - case (L1_MODE_HDLC): - if (bc) { - cs->hw.hfc.ctmt &= ~1; - cs->hw.hfc.isac_spcr &= ~0x03; - cs->hw.hfc.isac_spcr |= 0x02; - } else { - cs->hw.hfc.ctmt &= ~2; - cs->hw.hfc.isac_spcr &= ~0x0c; - cs->hw.hfc.isac_spcr |= 0x08; - } - break; - } - cs->BC_Write_Reg(cs, HFC_STATUS, cs->hw.hfc.ctmt, cs->hw.hfc.ctmt); - cs->writeisac(cs, ISAC_SPCR, cs->hw.hfc.isac_spcr); - if (mode == L1_MODE_HDLC) - hfc_clear_fifo(bcs); -} - -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_hfc(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_hfc(bcs, 0, st->l1.bc); - spin_unlock_irqrestore(&bcs->cs->lock, flags); - st->l1.l1l2(st, PH_DEACTIVATE | CONFIRM, NULL); - break; - } -} - - -static void -close_hfcstate(struct BCState *bcs) -{ - mode_hfc(bcs, 0, bcs->channel); - if (test_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); - } - } - test_and_clear_bit(BC_FLG_INIT, &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_hfc(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 -init_send(struct BCState *bcs) -{ - int i; - - bcs->hw.hfc.send = kmalloc_array(32, sizeof(unsigned int), GFP_ATOMIC); - if (!bcs->hw.hfc.send) { - printk(KERN_WARNING - "HiSax: No memory for hfc.send\n"); - return; - } - for (i = 0; i < 32; i++) - bcs->hw.hfc.send[i] = 0x1fff; -} - -void -inithfc(struct IsdnCardState *cs) -{ - init_send(&cs->bcs[0]); - init_send(&cs->bcs[1]); - cs->BC_Send_Data = &hfc_fill_fifo; - cs->bcs[0].BC_SetStack = setstack_hfc; - cs->bcs[1].BC_SetStack = setstack_hfc; - cs->bcs[0].BC_Close = close_hfcstate; - cs->bcs[1].BC_Close = close_hfcstate; - mode_hfc(cs->bcs, 0, 0); - mode_hfc(cs->bcs + 1, 0, 0); -} - -void -releasehfc(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; -} |