diff options
Diffstat (limited to 'drivers/isdn/hisax/ipacx.c')
| -rw-r--r-- | drivers/isdn/hisax/ipacx.c | 913 |
1 files changed, 913 insertions, 0 deletions
diff --git a/drivers/isdn/hisax/ipacx.c b/drivers/isdn/hisax/ipacx.c new file mode 100644 index 000000000..c7086c153 --- /dev/null +++ b/drivers/isdn/hisax/ipacx.c @@ -0,0 +1,913 @@ +/* + * + * IPACX specific routines + * + * Author Joerg Petersohn + * Derived from hisax_isac.c, isac.c, hscx.c and others + * + * This software may be used and distributed according to the terms + * of the GNU General Public License, incorporated herein by reference. + * + */ +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/init.h> +#include "hisax_if.h" +#include "hisax.h" +#include "isdnl1.h" +#include "ipacx.h" + +#define DBUSY_TIMER_VALUE 80 +#define TIMER3_VALUE 7000 +#define MAX_DFRAME_LEN_L1 300 +#define B_FIFO_SIZE 64 +#define D_FIFO_SIZE 32 + + +// ipacx interrupt mask values +#define _MASK_IMASK 0x2E // global mask +#define _MASKB_IMASK 0x0B +#define _MASKD_IMASK 0x03 // all on + +//---------------------------------------------------------- +// local function declarations +//---------------------------------------------------------- +static void ph_command(struct IsdnCardState *cs, unsigned int command); +static inline void cic_int(struct IsdnCardState *cs); +static void dch_l2l1(struct PStack *st, int pr, void *arg); +static void dbusy_timer_handler(struct timer_list *t); +static void dch_empty_fifo(struct IsdnCardState *cs, int count); +static void dch_fill_fifo(struct IsdnCardState *cs); +static inline void dch_int(struct IsdnCardState *cs); +static void dch_setstack(struct PStack *st, struct IsdnCardState *cs); +static void dch_init(struct IsdnCardState *cs); +static void bch_l2l1(struct PStack *st, int pr, void *arg); +static void bch_empty_fifo(struct BCState *bcs, int count); +static void bch_fill_fifo(struct BCState *bcs); +static void bch_int(struct IsdnCardState *cs, u_char hscx); +static void bch_mode(struct BCState *bcs, int mode, int bc); +static void bch_close_state(struct BCState *bcs); +static int bch_open_state(struct IsdnCardState *cs, struct BCState *bcs); +static int bch_setstack(struct PStack *st, struct BCState *bcs); +static void bch_init(struct IsdnCardState *cs, int hscx); +static void clear_pending_ints(struct IsdnCardState *cs); + +//---------------------------------------------------------- +// Issue Layer 1 command to chip +//---------------------------------------------------------- +static void +ph_command(struct IsdnCardState *cs, unsigned int command) +{ + if (cs->debug & L1_DEB_ISAC) + debugl1(cs, "ph_command (%#x) in (%#x)", command, + cs->dc.isac.ph_state); +//################################### +// printk(KERN_INFO "ph_command (%#x)\n", command); +//################################### + cs->writeisac(cs, IPACX_CIX0, (command << 4) | 0x0E); +} + +//---------------------------------------------------------- +// Transceiver interrupt handler +//---------------------------------------------------------- +static inline void +cic_int(struct IsdnCardState *cs) +{ + u_char event; + + event = cs->readisac(cs, IPACX_CIR0) >> 4; + if (cs->debug & L1_DEB_ISAC) debugl1(cs, "cic_int(event=%#x)", event); +//######################################### +// printk(KERN_INFO "cic_int(%x)\n", event); +//######################################### + cs->dc.isac.ph_state = event; + schedule_event(cs, D_L1STATECHANGE); +} + +//========================================================== +// D channel functions +//========================================================== + +//---------------------------------------------------------- +// Command entry point +//---------------------------------------------------------- +static void +dch_l2l1(struct PStack *st, int pr, void *arg) +{ + struct IsdnCardState *cs = (struct IsdnCardState *) st->l1.hardware; + struct sk_buff *skb = arg; + u_char cda1_cr; + + 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); + if (cs->tx_skb) { + skb_queue_tail(&cs->sq, skb); +#ifdef L2FRAME_DEBUG + 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 + if (cs->debug & L1_DEB_LAPD) Logl2Frame(cs, skb, "PH_DATA", 0); +#endif + dch_fill_fifo(cs); + } + break; + + case (PH_PULL | INDICATION): + 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->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 + if (cs->debug & L1_DEB_LAPD) Logl2Frame(cs, skb, "PH_DATA_PULLED", 0); +#endif + dch_fill_fifo(cs); + break; + + case (PH_PULL | REQUEST): +#ifdef L2FRAME_DEBUG + if (cs->debug & L1_DEB_LAPD) debugl1(cs, "-> PH_REQUEST_PULL"); +#endif + if (!cs->tx_skb) { + clear_bit(FLG_L1_PULL_REQ, &st->l1.Flags); + st->l1.l1l2(st, PH_PULL | CONFIRM, NULL); + } else + set_bit(FLG_L1_PULL_REQ, &st->l1.Flags); + break; + + case (HW_RESET | REQUEST): + case (HW_ENABLE | REQUEST): + if ((cs->dc.isac.ph_state == IPACX_IND_RES) || + (cs->dc.isac.ph_state == IPACX_IND_DR) || + (cs->dc.isac.ph_state == IPACX_IND_DC)) + ph_command(cs, IPACX_CMD_TIM); + else + ph_command(cs, IPACX_CMD_RES); + break; + + case (HW_INFO3 | REQUEST): + ph_command(cs, IPACX_CMD_AR8); + break; + + case (HW_TESTLOOP | REQUEST): + cs->writeisac(cs, IPACX_CDA_TSDP10, 0x80); // Timeslot 0 is B1 + cs->writeisac(cs, IPACX_CDA_TSDP11, 0x81); // Timeslot 0 is B1 + cda1_cr = cs->readisac(cs, IPACX_CDA1_CR); + (void) cs->readisac(cs, IPACX_CDA2_CR); + if ((long)arg & 1) { // loop B1 + cs->writeisac(cs, IPACX_CDA1_CR, cda1_cr | 0x0a); + } + else { // B1 off + cs->writeisac(cs, IPACX_CDA1_CR, cda1_cr & ~0x0a); + } + if ((long)arg & 2) { // loop B2 + cs->writeisac(cs, IPACX_CDA1_CR, cda1_cr | 0x14); + } + else { // B2 off + cs->writeisac(cs, IPACX_CDA1_CR, cda1_cr & ~0x14); + } + break; + + case (HW_DEACTIVATE | RESPONSE): + skb_queue_purge(&cs->rq); + skb_queue_purge(&cs->sq); + if (cs->tx_skb) { + dev_kfree_skb_any(cs->tx_skb); + cs->tx_skb = NULL; + } + if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags)) + del_timer(&cs->dbusytimer); + break; + + default: + if (cs->debug & L1_DEB_WARN) debugl1(cs, "dch_l2l1 unknown %04x", pr); + break; + } +} + +//---------------------------------------------------------- +//---------------------------------------------------------- +static void +dbusy_timer_handler(struct timer_list *t) +{ + struct IsdnCardState *cs = from_timer(cs, t, dbusytimer); + struct PStack *st; + int rbchd, stard; + + if (test_bit(FLG_DBUSY_TIMER, &cs->HW_Flags)) { + rbchd = cs->readisac(cs, IPACX_RBCHD); + stard = cs->readisac(cs, IPACX_STARD); + if (cs->debug) + debugl1(cs, "D-Channel Busy RBCHD %02x STARD %02x", rbchd, stard); + if (!(stard & 0x40)) { // D-Channel Busy + set_bit(FLG_L1_DBUSY, &cs->HW_Flags); + for (st = cs->stlist; st; st = st->next) { + st->l1.l1l2(st, PH_PAUSE | INDICATION, NULL); // flow control on + } + } else { + // seems we lost an interrupt; reset transceiver */ + clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags); + if (cs->tx_skb) { + dev_kfree_skb_any(cs->tx_skb); + cs->tx_cnt = 0; + cs->tx_skb = NULL; + } else { + printk(KERN_WARNING "HiSax: ISAC D-Channel Busy no skb\n"); + debugl1(cs, "D-Channel Busy no skb"); + } + cs->writeisac(cs, IPACX_CMDRD, 0x01); // Tx reset, generates XPR + } + } +} + +//---------------------------------------------------------- +// Fill buffer from receive FIFO +//---------------------------------------------------------- +static void +dch_empty_fifo(struct IsdnCardState *cs, int count) +{ + u_char *ptr; + + if ((cs->debug & L1_DEB_ISAC) && !(cs->debug & L1_DEB_ISAC_FIFO)) + debugl1(cs, "dch_empty_fifo()"); + + // message too large, remove + if ((cs->rcvidx + count) >= MAX_DFRAME_LEN_L1) { + if (cs->debug & L1_DEB_WARN) + debugl1(cs, "dch_empty_fifo() incoming message too large"); + cs->writeisac(cs, IPACX_CMDRD, 0x80); // RMC + cs->rcvidx = 0; + return; + } + + ptr = cs->rcvbuf + cs->rcvidx; + cs->rcvidx += count; + + cs->readisacfifo(cs, ptr, count); + cs->writeisac(cs, IPACX_CMDRD, 0x80); // RMC + + if (cs->debug & L1_DEB_ISAC_FIFO) { + char *t = cs->dlog; + + t += sprintf(t, "dch_empty_fifo() cnt %d", count); + QuickHex(t, ptr, count); + debugl1(cs, "%s", cs->dlog); + } +} + +//---------------------------------------------------------- +// Fill transmit FIFO +//---------------------------------------------------------- +static void +dch_fill_fifo(struct IsdnCardState *cs) +{ + int count; + u_char cmd, *ptr; + + if ((cs->debug & L1_DEB_ISAC) && !(cs->debug & L1_DEB_ISAC_FIFO)) + debugl1(cs, "dch_fill_fifo()"); + + if (!cs->tx_skb) return; + count = cs->tx_skb->len; + if (count <= 0) return; + + if (count > D_FIFO_SIZE) { + count = D_FIFO_SIZE; + cmd = 0x08; // XTF + } else { + cmd = 0x0A; // XTF | XME + } + + ptr = cs->tx_skb->data; + skb_pull(cs->tx_skb, count); + cs->tx_cnt += count; + cs->writeisacfifo(cs, ptr, count); + cs->writeisac(cs, IPACX_CMDRD, cmd); + + // set timeout for transmission contol + if (test_and_set_bit(FLG_DBUSY_TIMER, &cs->HW_Flags)) { + debugl1(cs, "dch_fill_fifo dbusytimer running"); + del_timer(&cs->dbusytimer); + } + cs->dbusytimer.expires = jiffies + ((DBUSY_TIMER_VALUE * HZ)/1000); + add_timer(&cs->dbusytimer); + + if (cs->debug & L1_DEB_ISAC_FIFO) { + char *t = cs->dlog; + + t += sprintf(t, "dch_fill_fifo() cnt %d", count); + QuickHex(t, ptr, count); + debugl1(cs, "%s", cs->dlog); + } +} + +//---------------------------------------------------------- +// D channel interrupt handler +//---------------------------------------------------------- +static inline void +dch_int(struct IsdnCardState *cs) +{ + struct sk_buff *skb; + u_char istad, rstad; + int count; + + istad = cs->readisac(cs, IPACX_ISTAD); +//############################################## +// printk(KERN_WARNING "dch_int(istad=%02x)\n", istad); +//############################################## + + if (istad & 0x80) { // RME + rstad = cs->readisac(cs, IPACX_RSTAD); + if ((rstad & 0xf0) != 0xa0) { // !(VFR && !RDO && CRC && !RAB) + if (!(rstad & 0x80)) + if (cs->debug & L1_DEB_WARN) + debugl1(cs, "dch_int(): invalid frame"); + if ((rstad & 0x40)) + if (cs->debug & L1_DEB_WARN) + debugl1(cs, "dch_int(): RDO"); + if (!(rstad & 0x20)) + if (cs->debug & L1_DEB_WARN) + debugl1(cs, "dch_int(): CRC error"); + cs->writeisac(cs, IPACX_CMDRD, 0x80); // RMC + } else { // received frame ok + count = cs->readisac(cs, IPACX_RBCLD); + if (count) count--; // RSTAB is last byte + count &= D_FIFO_SIZE - 1; + if (count == 0) count = D_FIFO_SIZE; + dch_empty_fifo(cs, count); + if ((count = cs->rcvidx) > 0) { + cs->rcvidx = 0; + if (!(skb = dev_alloc_skb(count))) + printk(KERN_WARNING "HiSax dch_int(): receive out of memory\n"); + else { + skb_put_data(skb, cs->rcvbuf, count); + skb_queue_tail(&cs->rq, skb); + } + } + } + cs->rcvidx = 0; + schedule_event(cs, D_RCVBUFREADY); + } + + if (istad & 0x40) { // RPF + dch_empty_fifo(cs, D_FIFO_SIZE); + } + + if (istad & 0x20) { // RFO + if (cs->debug & L1_DEB_WARN) debugl1(cs, "dch_int(): RFO"); + cs->writeisac(cs, IPACX_CMDRD, 0x40); //RRES + } + + if (istad & 0x10) { // XPR + 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) { + dch_fill_fifo(cs); + goto afterXPR; + } + else { + dev_kfree_skb_irq(cs->tx_skb); + cs->tx_skb = NULL; + cs->tx_cnt = 0; + } + } + if ((cs->tx_skb = skb_dequeue(&cs->sq))) { + cs->tx_cnt = 0; + dch_fill_fifo(cs); + } + else { + schedule_event(cs, D_XMTBUFREADY); + } + } +afterXPR: + + if (istad & 0x0C) { // XDU or XMR + if (cs->debug & L1_DEB_WARN) debugl1(cs, "dch_int(): XDU"); + if (cs->tx_skb) { + skb_push(cs->tx_skb, cs->tx_cnt); // retransmit + cs->tx_cnt = 0; + dch_fill_fifo(cs); + } else { + printk(KERN_WARNING "HiSax: ISAC XDU no skb\n"); + debugl1(cs, "ISAC XDU no skb"); + } + } +} + +//---------------------------------------------------------- +//---------------------------------------------------------- +static void +dch_setstack(struct PStack *st, struct IsdnCardState *cs) +{ + st->l1.l1hw = dch_l2l1; +} + +//---------------------------------------------------------- +//---------------------------------------------------------- +static void +dch_init(struct IsdnCardState *cs) +{ + printk(KERN_INFO "HiSax: IPACX ISDN driver v0.1.0\n"); + + cs->setstack_d = dch_setstack; + + timer_setup(&cs->dbusytimer, dbusy_timer_handler, 0); + + cs->writeisac(cs, IPACX_TR_CONF0, 0x00); // clear LDD + cs->writeisac(cs, IPACX_TR_CONF2, 0x00); // enable transmitter + cs->writeisac(cs, IPACX_MODED, 0xC9); // transparent mode 0, RAC, stop/go + cs->writeisac(cs, IPACX_MON_CR, 0x00); // disable monitor channel +} + + +//========================================================== +// B channel functions +//========================================================== + +//---------------------------------------------------------- +// Entry point for commands +//---------------------------------------------------------- +static void +bch_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; + set_bit(BC_FLG_BUSY, &bcs->Flag); + bcs->hw.hscx.count = 0; + bch_fill_fifo(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 "HiSax bch_l2l1(): this shouldn't happen\n"); + } else { + set_bit(BC_FLG_BUSY, &bcs->Flag); + bcs->tx_skb = skb; + bcs->hw.hscx.count = 0; + bch_fill_fifo(bcs); + } + spin_unlock_irqrestore(&bcs->cs->lock, flags); + break; + case (PH_PULL | REQUEST): + if (!bcs->tx_skb) { + clear_bit(FLG_L1_PULL_REQ, &st->l1.Flags); + st->l1.l1l2(st, PH_PULL | CONFIRM, NULL); + } else + set_bit(FLG_L1_PULL_REQ, &st->l1.Flags); + break; + case (PH_ACTIVATE | REQUEST): + spin_lock_irqsave(&bcs->cs->lock, flags); + set_bit(BC_FLG_ACTIV, &bcs->Flag); + bch_mode(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); + clear_bit(BC_FLG_ACTIV, &bcs->Flag); + clear_bit(BC_FLG_BUSY, &bcs->Flag); + bch_mode(bcs, 0, st->l1.bc); + spin_unlock_irqrestore(&bcs->cs->lock, flags); + st->l1.l1l2(st, PH_DEACTIVATE | CONFIRM, NULL); + break; + } +} + +//---------------------------------------------------------- +// Read B channel fifo to receive buffer +//---------------------------------------------------------- +static void +bch_empty_fifo(struct BCState *bcs, int count) +{ + u_char *ptr, hscx; + struct IsdnCardState *cs; + int cnt; + + cs = bcs->cs; + hscx = bcs->hw.hscx.hscx; + if ((cs->debug & L1_DEB_HSCX) && !(cs->debug & L1_DEB_HSCX_FIFO)) + debugl1(cs, "bch_empty_fifo()"); + + // message too large, remove + if (bcs->hw.hscx.rcvidx + count > HSCX_BUFMAX) { + if (cs->debug & L1_DEB_WARN) + debugl1(cs, "bch_empty_fifo() incoming packet too large"); + cs->BC_Write_Reg(cs, hscx, IPACX_CMDRB, 0x80); // RMC + bcs->hw.hscx.rcvidx = 0; + return; + } + + ptr = bcs->hw.hscx.rcvbuf + bcs->hw.hscx.rcvidx; + cnt = count; + while (cnt--) *ptr++ = cs->BC_Read_Reg(cs, hscx, IPACX_RFIFOB); + cs->BC_Write_Reg(cs, hscx, IPACX_CMDRB, 0x80); // RMC + + ptr = bcs->hw.hscx.rcvbuf + bcs->hw.hscx.rcvidx; + bcs->hw.hscx.rcvidx += count; + + if (cs->debug & L1_DEB_HSCX_FIFO) { + char *t = bcs->blog; + + t += sprintf(t, "bch_empty_fifo() B-%d cnt %d", hscx, count); + QuickHex(t, ptr, count); + debugl1(cs, "%s", bcs->blog); + } +} + +//---------------------------------------------------------- +// Fill buffer to transmit FIFO +//---------------------------------------------------------- +static void +bch_fill_fifo(struct BCState *bcs) +{ + struct IsdnCardState *cs; + int more, count, cnt; + u_char *ptr, *p, hscx; + + cs = bcs->cs; + if ((cs->debug & L1_DEB_HSCX) && !(cs->debug & L1_DEB_HSCX_FIFO)) + debugl1(cs, "bch_fill_fifo()"); + + if (!bcs->tx_skb) return; + if (bcs->tx_skb->len <= 0) return; + + hscx = bcs->hw.hscx.hscx; + more = (bcs->mode == L1_MODE_TRANS) ? 1 : 0; + if (bcs->tx_skb->len > B_FIFO_SIZE) { + more = 1; + count = B_FIFO_SIZE; + } else { + count = bcs->tx_skb->len; + } + cnt = count; + + p = ptr = bcs->tx_skb->data; + skb_pull(bcs->tx_skb, count); + bcs->tx_cnt -= count; + bcs->hw.hscx.count += count; + while (cnt--) cs->BC_Write_Reg(cs, hscx, IPACX_XFIFOB, *p++); + cs->BC_Write_Reg(cs, hscx, IPACX_CMDRB, (more ? 0x08 : 0x0a)); + + if (cs->debug & L1_DEB_HSCX_FIFO) { + char *t = bcs->blog; + + t += sprintf(t, "%s() B-%d cnt %d", __func__, hscx, count); + QuickHex(t, ptr, count); + debugl1(cs, "%s", bcs->blog); + } +} + +//---------------------------------------------------------- +// B channel interrupt handler +//---------------------------------------------------------- +static void +bch_int(struct IsdnCardState *cs, u_char hscx) +{ + u_char istab; + struct BCState *bcs; + struct sk_buff *skb; + int count; + u_char rstab; + + bcs = cs->bcs + hscx; + istab = cs->BC_Read_Reg(cs, hscx, IPACX_ISTAB); +//############################################## +// printk(KERN_WARNING "bch_int(istab=%02x)\n", istab); +//############################################## + if (!test_bit(BC_FLG_INIT, &bcs->Flag)) return; + + if (istab & 0x80) { // RME + rstab = cs->BC_Read_Reg(cs, hscx, IPACX_RSTAB); + if ((rstab & 0xf0) != 0xa0) { // !(VFR && !RDO && CRC && !RAB) + if (!(rstab & 0x80)) + if (cs->debug & L1_DEB_WARN) + debugl1(cs, "bch_int() B-%d: invalid frame", hscx); + if ((rstab & 0x40) && (bcs->mode != L1_MODE_NULL)) + if (cs->debug & L1_DEB_WARN) + debugl1(cs, "bch_int() B-%d: RDO mode=%d", hscx, bcs->mode); + if (!(rstab & 0x20)) + if (cs->debug & L1_DEB_WARN) + debugl1(cs, "bch_int() B-%d: CRC error", hscx); + cs->BC_Write_Reg(cs, hscx, IPACX_CMDRB, 0x80); // RMC + } + else { // received frame ok + count = cs->BC_Read_Reg(cs, hscx, IPACX_RBCLB) & (B_FIFO_SIZE - 1); + if (count == 0) count = B_FIFO_SIZE; + bch_empty_fifo(bcs, count); + if ((count = bcs->hw.hscx.rcvidx - 1) > 0) { + if (cs->debug & L1_DEB_HSCX_FIFO) + debugl1(cs, "bch_int Frame %d", count); + if (!(skb = dev_alloc_skb(count))) + printk(KERN_WARNING "HiSax bch_int(): receive frame out of memory\n"); + else { + skb_put_data(skb, bcs->hw.hscx.rcvbuf, + count); + skb_queue_tail(&bcs->rqueue, skb); + } + } + } + bcs->hw.hscx.rcvidx = 0; + schedule_event(bcs, B_RCVBUFREADY); + } + + if (istab & 0x40) { // RPF + bch_empty_fifo(bcs, B_FIFO_SIZE); + + if (bcs->mode == L1_MODE_TRANS) { // queue every chunk + // receive transparent audio data + if (!(skb = dev_alloc_skb(B_FIFO_SIZE))) + printk(KERN_WARNING "HiSax bch_int(): receive transparent out of memory\n"); + else { + skb_put_data(skb, bcs->hw.hscx.rcvbuf, + B_FIFO_SIZE); + skb_queue_tail(&bcs->rqueue, skb); + } + bcs->hw.hscx.rcvidx = 0; + schedule_event(bcs, B_RCVBUFREADY); + } + } + + if (istab & 0x20) { // RFO + if (cs->debug & L1_DEB_WARN) + debugl1(cs, "bch_int() B-%d: RFO error", hscx); + cs->BC_Write_Reg(cs, hscx, IPACX_CMDRB, 0x40); // RRES + } + + if (istab & 0x10) { // XPR + if (bcs->tx_skb) { + if (bcs->tx_skb->len) { + bch_fill_fifo(bcs); + goto afterXPR; + } 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->hw.hscx.count; + spin_unlock_irqrestore(&bcs->aclock, flags); + schedule_event(bcs, B_ACKPENDING); + } + } + dev_kfree_skb_irq(bcs->tx_skb); + bcs->hw.hscx.count = 0; + bcs->tx_skb = NULL; + } + if ((bcs->tx_skb = skb_dequeue(&bcs->squeue))) { + bcs->hw.hscx.count = 0; + set_bit(BC_FLG_BUSY, &bcs->Flag); + bch_fill_fifo(bcs); + } else { + clear_bit(BC_FLG_BUSY, &bcs->Flag); + schedule_event(bcs, B_XMTBUFREADY); + } + } +afterXPR: + + if (istab & 0x04) { // XDU + if (bcs->mode == L1_MODE_TRANS) { + bch_fill_fifo(bcs); + } + else { + if (bcs->tx_skb) { // restart transmitting the whole frame + skb_push(bcs->tx_skb, bcs->hw.hscx.count); + bcs->tx_cnt += bcs->hw.hscx.count; + bcs->hw.hscx.count = 0; + } + cs->BC_Write_Reg(cs, hscx, IPACX_CMDRB, 0x01); // XRES + if (cs->debug & L1_DEB_WARN) + debugl1(cs, "bch_int() B-%d XDU error", hscx); + } + } +} + +//---------------------------------------------------------- +//---------------------------------------------------------- +static void +bch_mode(struct BCState *bcs, int mode, int bc) +{ + struct IsdnCardState *cs = bcs->cs; + int hscx = bcs->hw.hscx.hscx; + + bc = bc ? 1 : 0; // in case bc is greater than 1 + if (cs->debug & L1_DEB_HSCX) + debugl1(cs, "mode_bch() switch B-%d mode %d chan %d", hscx, mode, bc); + bcs->mode = mode; + bcs->channel = bc; + + // map controller to according timeslot + if (!hscx) + { + cs->writeisac(cs, IPACX_BCHA_TSDP_BC1, 0x80 | bc); + cs->writeisac(cs, IPACX_BCHA_CR, 0x88); + } + else + { + cs->writeisac(cs, IPACX_BCHB_TSDP_BC1, 0x80 | bc); + cs->writeisac(cs, IPACX_BCHB_CR, 0x88); + } + + switch (mode) { + case (L1_MODE_NULL): + cs->BC_Write_Reg(cs, hscx, IPACX_MODEB, 0xC0); // rec off + cs->BC_Write_Reg(cs, hscx, IPACX_EXMB, 0x30); // std adj. + cs->BC_Write_Reg(cs, hscx, IPACX_MASKB, 0xFF); // ints off + cs->BC_Write_Reg(cs, hscx, IPACX_CMDRB, 0x41); // validate adjustments + break; + case (L1_MODE_TRANS): + cs->BC_Write_Reg(cs, hscx, IPACX_MODEB, 0x88); // ext transp mode + cs->BC_Write_Reg(cs, hscx, IPACX_EXMB, 0x00); // xxx00000 + cs->BC_Write_Reg(cs, hscx, IPACX_CMDRB, 0x41); // validate adjustments + cs->BC_Write_Reg(cs, hscx, IPACX_MASKB, _MASKB_IMASK); + break; + case (L1_MODE_HDLC): + cs->BC_Write_Reg(cs, hscx, IPACX_MODEB, 0xC8); // transp mode 0 + cs->BC_Write_Reg(cs, hscx, IPACX_EXMB, 0x01); // idle=hdlc flags crc enabled + cs->BC_Write_Reg(cs, hscx, IPACX_CMDRB, 0x41); // validate adjustments + cs->BC_Write_Reg(cs, hscx, IPACX_MASKB, _MASKB_IMASK); + break; + } +} + +//---------------------------------------------------------- +//---------------------------------------------------------- +static void +bch_close_state(struct BCState *bcs) +{ + bch_mode(bcs, 0, bcs->channel); + if (test_and_clear_bit(BC_FLG_INIT, &bcs->Flag)) { + kfree(bcs->hw.hscx.rcvbuf); + bcs->hw.hscx.rcvbuf = NULL; + kfree(bcs->blog); + bcs->blog = 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; + clear_bit(BC_FLG_BUSY, &bcs->Flag); + } + } +} + +//---------------------------------------------------------- +//---------------------------------------------------------- +static int +bch_open_state(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 open_bchstate(): No memory for hscx.rcvbuf\n"); + clear_bit(BC_FLG_INIT, &bcs->Flag); + return (1); + } + if (!(bcs->blog = kmalloc(MAX_BLOG_SPACE, GFP_ATOMIC))) { + printk(KERN_WARNING + "HiSax open_bchstate: No memory for bcs->blog\n"); + 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; + clear_bit(BC_FLG_BUSY, &bcs->Flag); + bcs->event = 0; + bcs->hw.hscx.rcvidx = 0; + bcs->tx_cnt = 0; + return (0); +} + +//---------------------------------------------------------- +//---------------------------------------------------------- +static int +bch_setstack(struct PStack *st, struct BCState *bcs) +{ + bcs->channel = st->l1.bc; + if (bch_open_state(st->l1.hardware, bcs)) return (-1); + st->l1.bcs = bcs; + st->l2.l2l1 = bch_l2l1; + setstack_manager(st); + bcs->st = st; + setstack_l1_B(st); + return (0); +} + +//---------------------------------------------------------- +//---------------------------------------------------------- +static void +bch_init(struct IsdnCardState *cs, int hscx) +{ + cs->bcs[hscx].BC_SetStack = bch_setstack; + cs->bcs[hscx].BC_Close = bch_close_state; + cs->bcs[hscx].hw.hscx.hscx = hscx; + cs->bcs[hscx].cs = cs; + bch_mode(cs->bcs + hscx, 0, hscx); +} + + +//========================================================== +// Shared functions +//========================================================== + +//---------------------------------------------------------- +// Main interrupt handler +//---------------------------------------------------------- +void +interrupt_ipacx(struct IsdnCardState *cs) +{ + u_char ista; + + while ((ista = cs->readisac(cs, IPACX_ISTA))) { +//################################################# +// printk(KERN_WARNING "interrupt_ipacx(ista=%02x)\n", ista); +//################################################# + if (ista & 0x80) bch_int(cs, 0); // B channel interrupts + if (ista & 0x40) bch_int(cs, 1); + + if (ista & 0x01) dch_int(cs); // D channel + if (ista & 0x10) cic_int(cs); // Layer 1 state + } +} + +//---------------------------------------------------------- +// Clears chip interrupt status +//---------------------------------------------------------- +static void +clear_pending_ints(struct IsdnCardState *cs) +{ + int ista; + + // all interrupts off + cs->writeisac(cs, IPACX_MASK, 0xff); + cs->writeisac(cs, IPACX_MASKD, 0xff); + cs->BC_Write_Reg(cs, 0, IPACX_MASKB, 0xff); + cs->BC_Write_Reg(cs, 1, IPACX_MASKB, 0xff); + + ista = cs->readisac(cs, IPACX_ISTA); + if (ista & 0x80) cs->BC_Read_Reg(cs, 0, IPACX_ISTAB); + if (ista & 0x40) cs->BC_Read_Reg(cs, 1, IPACX_ISTAB); + if (ista & 0x10) cs->readisac(cs, IPACX_CIR0); + if (ista & 0x01) cs->readisac(cs, IPACX_ISTAD); +} + +//---------------------------------------------------------- +// Does chip configuration work +// Work to do depends on bit mask in part +//---------------------------------------------------------- +void +init_ipacx(struct IsdnCardState *cs, int part) +{ + if (part & 1) { // initialise chip +//################################################## +// printk(KERN_INFO "init_ipacx(%x)\n", part); +//################################################## + clear_pending_ints(cs); + bch_init(cs, 0); + bch_init(cs, 1); + dch_init(cs); + } + if (part & 2) { // reenable all interrupts and start chip + cs->BC_Write_Reg(cs, 0, IPACX_MASKB, _MASKB_IMASK); + cs->BC_Write_Reg(cs, 1, IPACX_MASKB, _MASKB_IMASK); + cs->writeisac(cs, IPACX_MASKD, _MASKD_IMASK); + cs->writeisac(cs, IPACX_MASK, _MASK_IMASK); // global mask register + + // reset HDLC Transmitters/receivers + cs->writeisac(cs, IPACX_CMDRD, 0x41); + cs->BC_Write_Reg(cs, 0, IPACX_CMDRB, 0x41); + cs->BC_Write_Reg(cs, 1, IPACX_CMDRB, 0x41); + ph_command(cs, IPACX_CMD_RES); + } +} + +//----------------- end of file ----------------------- |