/* * Copyright (c) 1997, 2000 Hellmuth Michaelis. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * *--------------------------------------------------------------------------- * * i4b_isac.c - i4b siemens isdn chipset driver ISAC handler * --------------------------------------------------------- * * $Id: isac.c,v 1.8 2002/04/01 12:12:26 martin Exp $ * * last edit-date: [Fri Jan 5 11:36:10 2001] * *---------------------------------------------------------------------------*/ #include __KERNEL_RCSID(0, "$NetBSD: isac.c,v 1.8 2002/04/01 12:12:26 martin Exp $"); #ifdef __FreeBSD__ #include "opt_i4b.h" #endif #include #if defined(__FreeBSD__) && __FreeBSD__ >= 3 #include #else #include #endif #include #include #include #include #ifdef __FreeBSD__ #include #include #else #ifndef __bsdi__ #include #endif #include #endif #include #include #if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000 #include #endif #ifdef __FreeBSD__ #include #include #include #else #include #include #include #endif #include #include #include #include #include #include #include static u_char isic_isac_exir_hdlr(register struct isic_softc *sc, u_char exir); static void isic_isac_ind_hdlr(register struct isic_softc *sc, int ind); /*---------------------------------------------------------------------------* * ISAC interrupt service routine *---------------------------------------------------------------------------*/ int isic_isac_irq(struct isic_softc *sc, int ista) { register u_char c = 0; NDBGL1(L1_F_MSG, "%s: ista = 0x%02x", sc->sc_dev.dv_xname, ista); if(ista & ISAC_ISTA_EXI) /* extended interrupt */ { u_int8_t exirstat = ISAC_READ(I_EXIR); if ((ista & ~ISAC_IMASK) && exirstat == 0xff) { /* bogus - might be a detaching pcmcia card */ return (1); } c |= isic_isac_exir_hdlr(sc, exirstat); } if(ista & ISAC_ISTA_RME) /* receive message end */ { register int rest; u_char rsta; /* get rx status register */ rsta = ISAC_READ(I_RSTA); if((rsta & ISAC_RSTA_MASK) != 0x20) { int error = 0; if(!(rsta & ISAC_RSTA_CRC)) /* CRC error */ { error++; NDBGL1(L1_I_ERR, "%s: CRC error", sc->sc_dev.dv_xname); } if(rsta & ISAC_RSTA_RDO) /* ReceiveDataOverflow */ { error++; NDBGL1(L1_I_ERR, "%s: Data Overrun error", sc->sc_dev.dv_xname); } if(rsta & ISAC_RSTA_RAB) /* ReceiveABorted */ { error++; NDBGL1(L1_I_ERR, "%s: Receive Aborted error", sc->sc_dev.dv_xname); } if(error == 0) { NDBGL1(L1_I_ERR, "%s: RME unknown error, RSTA = 0x%02x!", sc->sc_dev.dv_xname, rsta); } i4b_Dfreembuf(sc->sc_ibuf); c |= ISAC_CMDR_RMC|ISAC_CMDR_RRES; sc->sc_ibuf = NULL; sc->sc_ib = NULL; sc->sc_ilen = 0; ISAC_WRITE(I_CMDR, ISAC_CMDR_RMC|ISAC_CMDR_RRES); ISACCMDRWRDELAY(); return (0); } rest = (ISAC_READ(I_RBCL) & (ISAC_FIFO_LEN-1)); if(rest == 0) rest = ISAC_FIFO_LEN; if(sc->sc_ibuf == NULL) { if((sc->sc_ibuf = i4b_Dgetmbuf(rest)) != NULL) sc->sc_ib = sc->sc_ibuf->m_data; else panic("isic_isac_irq: RME, i4b_Dgetmbuf returns NULL!\n"); sc->sc_ilen = 0; } if(sc->sc_ilen <= (MAX_DFRAME_LEN - rest)) { ISAC_RDFIFO(sc->sc_ib, rest); sc->sc_ilen += rest; sc->sc_ibuf->m_pkthdr.len = sc->sc_ibuf->m_len = sc->sc_ilen; if(sc->sc_trace & TRACE_D_RX) { i4b_trace_hdr hdr; memset(&hdr, 0, sizeof hdr); hdr.type = TRC_CH_D; hdr.dir = FROM_NT; hdr.count = ++sc->sc_trace_dcount; isdn_layer2_trace_ind(&sc->sc_l2, &hdr, sc->sc_ibuf->m_len, sc->sc_ibuf->m_data); } c |= ISAC_CMDR_RMC; if(sc->sc_enabled && (((struct isdn_l3_driver*)sc->sc_l3token)->protocol != PROTOCOL_D64S)) { isdn_layer2_data_ind(&sc->sc_l2, sc->sc_ibuf); } else { i4b_Dfreembuf(sc->sc_ibuf); } } else { NDBGL1(L1_I_ERR, "RME, input buffer overflow!"); i4b_Dfreembuf(sc->sc_ibuf); c |= ISAC_CMDR_RMC|ISAC_CMDR_RRES; } sc->sc_ibuf = NULL; sc->sc_ib = NULL; sc->sc_ilen = 0; } if(ista & ISAC_ISTA_RPF) /* receive fifo full */ { if(sc->sc_ibuf == NULL) { if((sc->sc_ibuf = i4b_Dgetmbuf(MAX_DFRAME_LEN)) != NULL) sc->sc_ib= sc->sc_ibuf->m_data; else panic("isic_isac_irq: RPF, i4b_Dgetmbuf returns NULL!\n"); sc->sc_ilen = 0; } if(sc->sc_ilen <= (MAX_DFRAME_LEN - ISAC_FIFO_LEN)) { ISAC_RDFIFO(sc->sc_ib, ISAC_FIFO_LEN); sc->sc_ilen += ISAC_FIFO_LEN; sc->sc_ib += ISAC_FIFO_LEN; c |= ISAC_CMDR_RMC; } else { NDBGL1(L1_I_ERR, "RPF, input buffer overflow!"); i4b_Dfreembuf(sc->sc_ibuf); sc->sc_ibuf = NULL; sc->sc_ib = NULL; sc->sc_ilen = 0; c |= ISAC_CMDR_RMC|ISAC_CMDR_RRES; } } if(ista & ISAC_ISTA_XPR) /* transmit fifo empty (XPR bit set) */ { if((sc->sc_obuf2 != NULL) && (sc->sc_obuf == NULL)) { sc->sc_freeflag = sc->sc_freeflag2; sc->sc_obuf = sc->sc_obuf2; sc->sc_op = sc->sc_obuf->m_data; sc->sc_ol = sc->sc_obuf->m_len; sc->sc_obuf2 = NULL; #ifdef NOTDEF printf("ob2=%x, op=%x, ol=%d, f=%d #", sc->sc_obuf, sc->sc_op, sc->sc_ol, sc->sc_state); #endif } else { #ifdef NOTDEF printf("ob=%x, op=%x, ol=%d, f=%d #", sc->sc_obuf, sc->sc_op, sc->sc_ol, sc->sc_state); #endif } if(sc->sc_obuf) { ISAC_WRFIFO(sc->sc_op, min(sc->sc_ol, ISAC_FIFO_LEN)); if(sc->sc_ol > ISAC_FIFO_LEN) /* length > 32 ? */ { sc->sc_op += ISAC_FIFO_LEN; /* bufferptr+32 */ sc->sc_ol -= ISAC_FIFO_LEN; /* length - 32 */ c |= ISAC_CMDR_XTF; /* set XTF bit */ } else { if(sc->sc_freeflag) { i4b_Dfreembuf(sc->sc_obuf); sc->sc_freeflag = 0; } sc->sc_obuf = NULL; sc->sc_op = NULL; sc->sc_ol = 0; c |= ISAC_CMDR_XTF | ISAC_CMDR_XME; } } else { sc->sc_state &= ~ISAC_TX_ACTIVE; } } if(ista & ISAC_ISTA_CISQ) /* channel status change CISQ */ { register u_char ci; /* get command/indication rx register*/ ci = ISAC_READ(I_CIRR); /* if S/Q IRQ, read SQC reg to clr SQC IRQ */ if(ci & ISAC_CIRR_SQC) (void) ISAC_READ(I_SQRR); /* C/I code change IRQ (flag already cleared by CIRR read) */ if(ci & ISAC_CIRR_CIC0) isic_isac_ind_hdlr(sc, (ci >> 2) & 0xf); } if(c) { ISAC_WRITE(I_CMDR, c); ISACCMDRWRDELAY(); } return (0); } /*---------------------------------------------------------------------------* * ISAC L1 Extended IRQ handler *---------------------------------------------------------------------------*/ static u_char isic_isac_exir_hdlr(register struct isic_softc *sc, u_char exir) { u_char c = 0; if(exir & ISAC_EXIR_XMR) { NDBGL1(L1_I_ERR, "EXIRQ Tx Message Repeat"); c |= ISAC_CMDR_XRES; } if(exir & ISAC_EXIR_XDU) { NDBGL1(L1_I_ERR, "EXIRQ Tx Data Underrun"); c |= ISAC_CMDR_XRES; } if(exir & ISAC_EXIR_PCE) { NDBGL1(L1_I_ERR, "EXIRQ Protocol Error"); } if(exir & ISAC_EXIR_RFO) { NDBGL1(L1_I_ERR, "EXIRQ Rx Frame Overflow"); c |= ISAC_CMDR_RMC|ISAC_CMDR_RRES; } if(exir & ISAC_EXIR_SOV) { NDBGL1(L1_I_ERR, "EXIRQ Sync Xfer Overflow"); } if(exir & ISAC_EXIR_MOS) { NDBGL1(L1_I_ERR, "EXIRQ Monitor Status"); } if(exir & ISAC_EXIR_SAW) { /* cannot happen, STCR:TSF is set to 0 */ NDBGL1(L1_I_ERR, "EXIRQ Subscriber Awake"); } if(exir & ISAC_EXIR_WOV) { /* cannot happen, STCR:TSF is set to 0 */ NDBGL1(L1_I_ERR, "EXIRQ Watchdog Timer Overflow"); } return(c); } /*---------------------------------------------------------------------------* * ISAC L1 Indication handler *---------------------------------------------------------------------------*/ static void isic_isac_ind_hdlr(register struct isic_softc *sc, int ind) { register int event; switch(ind) { case ISAC_CIRR_IAI8: NDBGL1(L1_I_CICO, "rx AI8 in state %s", isic_printstate(sc)); if(sc->sc_bustyp == BUS_TYPE_IOM2) isic_isac_l1_cmd(sc, CMD_AR8); event = EV_INFO48; isdn_layer2_status_ind(&sc->sc_l2, STI_L1STAT, LAYER_ACTIVE); break; case ISAC_CIRR_IAI10: NDBGL1(L1_I_CICO, "rx AI10 in state %s", isic_printstate(sc)); if(sc->sc_bustyp == BUS_TYPE_IOM2) isic_isac_l1_cmd(sc, CMD_AR10); event = EV_INFO410; isdn_layer2_status_ind(&sc->sc_l2, STI_L1STAT, LAYER_ACTIVE); break; case ISAC_CIRR_IRSY: NDBGL1(L1_I_CICO, "rx RSY in state %s", isic_printstate(sc)); event = EV_RSY; break; case ISAC_CIRR_IPU: NDBGL1(L1_I_CICO, "rx PU in state %s", isic_printstate(sc)); event = EV_PU; break; case ISAC_CIRR_IDR: NDBGL1(L1_I_CICO, "rx DR in state %s", isic_printstate(sc)); isic_isac_l1_cmd(sc, CMD_DIU); event = EV_DR; break; case ISAC_CIRR_IDID: NDBGL1(L1_I_CICO, "rx DID in state %s", isic_printstate(sc)); event = EV_INFO0; isdn_layer2_status_ind(&sc->sc_l2, STI_L1STAT, LAYER_IDLE); break; case ISAC_CIRR_IDIS: NDBGL1(L1_I_CICO, "rx DIS in state %s", isic_printstate(sc)); event = EV_DIS; break; case ISAC_CIRR_IEI: NDBGL1(L1_I_CICO, "rx EI in state %s", isic_printstate(sc)); isic_isac_l1_cmd(sc, CMD_DIU); event = EV_EI; break; case ISAC_CIRR_IARD: NDBGL1(L1_I_CICO, "rx ARD in state %s", isic_printstate(sc)); event = EV_INFO2; break; case ISAC_CIRR_ITI: NDBGL1(L1_I_CICO, "rx TI in state %s", isic_printstate(sc)); event = EV_INFO0; break; case ISAC_CIRR_IATI: NDBGL1(L1_I_CICO, "rx ATI in state %s", isic_printstate(sc)); event = EV_INFO0; break; case ISAC_CIRR_ISD: NDBGL1(L1_I_CICO, "rx SD in state %s", isic_printstate(sc)); event = EV_INFO0; break; default: NDBGL1(L1_I_ERR, "UNKNOWN Indication 0x%x in state %s", ind, isic_printstate(sc)); event = EV_INFO0; break; } isic_next_state(sc, event); } /*---------------------------------------------------------------------------* * execute a layer 1 command *---------------------------------------------------------------------------*/ void isic_isac_l1_cmd(struct isic_softc *sc, int command) { u_char cmd; #ifdef I4B_SMP_WORKAROUND /* XXXXXXXXXXXXXXXXXXX */ /* * patch from Wolfgang Helbig: * * Here is a patch that makes i4b work on an SMP: * The card (TELES 16.3) didn't interrupt on an SMP machine. * This is a gross workaround, but anyway it works *and* provides * some information as how to finally fix this problem. */ HSCX_WRITE(0, H_MASK, 0xff); HSCX_WRITE(1, H_MASK, 0xff); ISAC_WRITE(I_MASK, 0xff); DELAY(100); HSCX_WRITE(0, H_MASK, HSCX_A_IMASK); HSCX_WRITE(1, H_MASK, HSCX_B_IMASK); ISAC_WRITE(I_MASK, ISAC_IMASK); /* XXXXXXXXXXXXXXXXXXX */ #endif /* I4B_SMP_WORKAROUND */ if(command < 0 || command > CMD_ILL) { NDBGL1(L1_I_ERR, "illegal cmd 0x%x in state %s", command, isic_printstate(sc)); return; } if(sc->sc_bustyp == BUS_TYPE_IOM2) cmd = ISAC_CIX0_LOW; else cmd = 0; switch(command) { case CMD_TIM: NDBGL1(L1_I_CICO, "tx TIM in state %s", isic_printstate(sc)); cmd |= (ISAC_CIXR_CTIM << 2); break; case CMD_RS: NDBGL1(L1_I_CICO, "tx RS in state %s", isic_printstate(sc)); cmd |= (ISAC_CIXR_CRS << 2); break; case CMD_AR8: NDBGL1(L1_I_CICO, "tx AR8 in state %s", isic_printstate(sc)); cmd |= (ISAC_CIXR_CAR8 << 2); break; case CMD_AR10: NDBGL1(L1_I_CICO, "tx AR10 in state %s", isic_printstate(sc)); cmd |= (ISAC_CIXR_CAR10 << 2); break; case CMD_DIU: NDBGL1(L1_I_CICO, "tx DIU in state %s", isic_printstate(sc)); cmd |= (ISAC_CIXR_CDIU << 2); break; } ISAC_WRITE(I_CIXR, cmd); } /*---------------------------------------------------------------------------* * L1 ISAC initialization *---------------------------------------------------------------------------*/ int isic_isac_init(struct isic_softc *sc) { sc->sc_dying = 0; ISAC_IMASK = 0xff; /* disable all irqs */ ISAC_WRITE(I_MASK, ISAC_IMASK); if(sc->sc_bustyp != BUS_TYPE_IOM2) { NDBGL1(L1_I_SETUP, "configuring for IOM-1 mode"); /* ADF2: Select mode IOM-1 */ ISAC_WRITE(I_ADF2, 0x00); /* SPCR: serial port control register: * SPU - software power up = 0 * SAC - SIP port high Z * SPM - timing mode 0 * TLP - test loop = 0 * C1C, C2C - B1 and B2 switched to/from SPa */ ISAC_WRITE(I_SPCR, ISAC_SPCR_C1C1|ISAC_SPCR_C2C1); /* SQXR: S/Q channel xmit register: * SQIE - S/Q IRQ enable = 0 * SQX1-4 - Fa bits = 1 */ ISAC_WRITE(I_SQXR, ISAC_SQXR_SQX1|ISAC_SQXR_SQX2|ISAC_SQXR_SQX3|ISAC_SQXR_SQX4); /* ADF1: additional feature reg 1: * WTC - watchdog = 0 * TEM - test mode = 0 * PFS - pre-filter = 0 * CFS - IOM clock/frame always active * FSC1/2 - polarity of 8kHz strobe * ITF - interframe fill = idle */ ISAC_WRITE(I_ADF1, ISAC_ADF1_FC2); /* ADF1 */ /* STCR: sync transfer control reg: * TSF - terminal secific functions = 0 * TBA - TIC bus address = 7 * STx/SCx = 0 */ ISAC_WRITE(I_STCR, ISAC_STCR_TBA2|ISAC_STCR_TBA1|ISAC_STCR_TBA0); /* MODE: Mode Register: * MDSx - transparent mode 2 * TMD - timer mode = external * RAC - Receiver enabled * DIMx - digital i/f mode */ ISAC_WRITE(I_MODE, ISAC_MODE_MDS2|ISAC_MODE_MDS1|ISAC_MODE_RAC|ISAC_MODE_DIM0); } else { NDBGL1(L1_I_SETUP, "configuring for IOM-2 mode"); /* ADF2: Select mode IOM-2 */ ISAC_WRITE(I_ADF2, ISAC_ADF2_IMS); /* SPCR: serial port control register: * SPU - software power up = 0 * SPM - timing mode 0 * TLP - test loop = 0 * C1C, C2C - B1 + C1 and B2 + IC2 monitoring */ ISAC_WRITE(I_SPCR, 0x00); /* SQXR: S/Q channel xmit register: * IDC - IOM direction = 0 (master) * CFS - Config Select = 0 (clock always active) * CI1E - C/I channel 1 IRQ enable = 0 * SQIE - S/Q IRQ enable = 0 * SQX1-4 - Fa bits = 1 */ ISAC_WRITE(I_SQXR, ISAC_SQXR_SQX1|ISAC_SQXR_SQX2|ISAC_SQXR_SQX3|ISAC_SQXR_SQX4); /* ADF1: additional feature reg 1: * WTC - watchdog = 0 * TEM - test mode = 0 * PFS - pre-filter = 0 * IOF - IOM i/f off = 0 * ITF - interframe fill = idle */ ISAC_WRITE(I_ADF1, 0x00); /* STCR: sync transfer control reg: * TSF - terminal secific functions = 0 * TBA - TIC bus address = 7 * STx/SCx = 0 */ ISAC_WRITE(I_STCR, ISAC_STCR_TBA2|ISAC_STCR_TBA1|ISAC_STCR_TBA0); /* MODE: Mode Register: * MDSx - transparent mode 2 * TMD - timer mode = external * RAC - Receiver enabled * DIMx - digital i/f mode */ ISAC_WRITE(I_MODE, ISAC_MODE_MDS2|ISAC_MODE_MDS1|ISAC_MODE_RAC|ISAC_MODE_DIM0); } #ifdef NOTDEF /* * XXX a transmitter reset causes an ISAC tx IRQ which will not * be serviced at attach time under some circumstances leaving * the associated IRQ line on the ISA bus active. This prevents * any further interrupts to be serviced because no low -> high * transition can take place anymore. (-hm) */ /* command register: * RRES - HDLC receiver reset * XRES - transmitter reset */ ISAC_WRITE(I_CMDR, ISAC_CMDR_RRES|ISAC_CMDR_XRES); ISACCMDRWRDELAY(); #endif /* enabled interrupts: * =================== * RME - receive message end * RPF - receive pool full * XPR - transmit pool ready * CISQ - CI or S/Q channel change * EXI - extended interrupt */ ISAC_IMASK = ISAC_MASK_RSC | /* auto mode only */ ISAC_MASK_TIN | /* timer irq */ ISAC_MASK_SIN; /* sync xfer irq */ /* * We don't want interrupts enabled attach time, so setup the * mask, but don't write it to the chip yet */ /* ISAC_WRITE(I_MASK, ISAC_IMASK); */ return(0); } /*---------------------------------------------------------------------------* * isic_recovery - try to recover from irq lockup *---------------------------------------------------------------------------*/ void isic_recover(struct isic_softc *sc) { u_char byte; /* get hscx irq status from hscx b ista */ byte = HSCX_READ(HSCX_CH_B, H_ISTA); NDBGL1(L1_ERROR, "HSCX B: ISTA = 0x%x", byte); if(byte & HSCX_ISTA_ICA) NDBGL1(L1_ERROR, "HSCX A: ISTA = 0x%x", (u_char)HSCX_READ(HSCX_CH_A, H_ISTA)); if(byte & HSCX_ISTA_EXB) NDBGL1(L1_ERROR, "HSCX B: EXIR = 0x%x", (u_char)HSCX_READ(HSCX_CH_B, H_EXIR)); if(byte & HSCX_ISTA_EXA) NDBGL1(L1_ERROR, "HSCX A: EXIR = 0x%x", (u_char)HSCX_READ(HSCX_CH_A, H_EXIR)); /* get isac irq status */ byte = ISAC_READ(I_ISTA); NDBGL1(L1_ERROR, " ISAC: ISTA = 0x%x", byte); if(byte & ISAC_ISTA_EXI) NDBGL1(L1_ERROR, " ISAC: EXIR = 0x%x", (u_char)ISAC_READ(I_EXIR)); if(byte & ISAC_ISTA_CISQ) { byte = ISAC_READ(I_CIRR); NDBGL1(L1_ERROR, " ISAC: CISQ = 0x%x", byte); if(byte & ISAC_CIRR_SQC) NDBGL1(L1_ERROR, " ISAC: SQRR = 0x%x", (u_char)ISAC_READ(I_SQRR)); } NDBGL1(L1_ERROR, "HSCX B: IMASK = 0x%x", HSCX_B_IMASK); NDBGL1(L1_ERROR, "HSCX A: IMASK = 0x%x", HSCX_A_IMASK); HSCX_WRITE(0, H_MASK, 0xff); HSCX_WRITE(1, H_MASK, 0xff); DELAY(100); HSCX_WRITE(0, H_MASK, HSCX_A_IMASK); HSCX_WRITE(1, H_MASK, HSCX_B_IMASK); DELAY(100); NDBGL1(L1_ERROR, " ISAC: IMASK = 0x%x", ISAC_IMASK); ISAC_WRITE(I_MASK, 0xff); DELAY(100); ISAC_WRITE(I_MASK, ISAC_IMASK); }