/*- * cyclades cyclom-y serial driver * Andrew Herbert , 17 August 1993 * * Copyright (c) 1993 Andrew Herbert. * 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. * 3. The name Andrew Herbert may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY ``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 I 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. */ #include __FBSDID("$FreeBSD$"); #include "opt_compat.h" /* * TODO: * Atomic COR change. * Consoles. */ /* * Temporary compile-time configuration options. */ #define RxFifoThreshold (CD1400_RX_FIFO_SIZE / 2) /* Number of chars in the receiver FIFO before an * an interrupt is generated. Should depend on * line speed. Needs to be about 6 on a 486DX33 * for 4 active ports at 115200 bps. Why doesn't * 10 work? */ #define PollMode /* Use polling-based irq service routine, not the * hardware svcack lines. Must be defined for * Cyclom-16Y boards. Less efficient for Cyclom-8Ys, * and stops 4 * 115200 bps from working. */ #undef Smarts /* Enable slightly more CD1400 intelligence. Mainly * the output CR/LF processing, plus we can avoid a * few checks usually done in ttyinput(). * * XXX not fully implemented, and not particularly * worthwhile. */ #undef CyDebug /* Include debugging code (not very expensive). */ /* These will go away. */ #undef SOFT_CTS_OFLOW #define SOFT_HOTCHAR #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define NCY 10 /* KLUDGE */ #define NPORTS (NCY * CY_MAX_PORTS) #define CY_MAX_PORTS (CD1400_NO_OF_CHANNELS * CY_MAX_CD1400s) /* We encode the cyclom unit number (cyu) in spare bits in the IVR's. */ #define CD1400_xIVR_CHAN_SHIFT 3 #define CD1400_xIVR_CHAN 0x1F /* * ETC states. com->etc may also contain a hardware ETC command value, * meaning that execution of that command is pending. */ #define ETC_NONE 0 /* we depend on bzero() setting this */ #define ETC_BREAK_STARTING 1 #define ETC_BREAK_STARTED 2 #define ETC_BREAK_ENDING 3 #define ETC_BREAK_ENDED 4 #define LOTS_OF_EVENTS 64 /* helps separate urgent events from input */ /* * com state bits. * (CS_BUSY | CS_TTGO) and (CS_BUSY | CS_TTGO | CS_ODEVREADY) must be higher * than the other bits so that they can be tested as a group without masking * off the low bits. * * The following com and tty flags correspond closely: * CS_BUSY = TS_BUSY (maintained by cystart(), cypoll() and * comstop()) * CS_TTGO = ~TS_TTSTOP (maintained by cyparam() and cystart()) * CS_CTS_OFLOW = CCTS_OFLOW (maintained by cyparam()) * CS_RTS_IFLOW = CRTS_IFLOW (maintained by cyparam()) * TS_FLUSH is not used. * XXX I think TIOCSETA doesn't clear TS_TTSTOP when it clears IXON. * XXX CS_*FLOW should be CF_*FLOW in com->flags (control flags not state). */ #define CS_BUSY 0x80 /* output in progress */ #define CS_TTGO 0x40 /* output not stopped by XOFF */ #define CS_ODEVREADY 0x20 /* external device h/w ready (CTS) */ #define CS_CHECKMSR 1 /* check of MSR scheduled */ #define CS_CTS_OFLOW 2 /* use CTS output flow control */ #define CS_ODONE 4 /* output completed */ #define CS_RTS_IFLOW 8 /* use RTS input flow control */ #define CSE_ODONE 1 /* output transmitted */ static char const * const error_desc[] = { #define CE_OVERRUN 0 "silo overflow", #define CE_INTERRUPT_BUF_OVERFLOW 1 "interrupt-level buffer overflow", #define CE_TTY_BUF_OVERFLOW 2 "tty-level buffer overflow", }; #define CE_NTYPES 3 #define CE_RECORD(com, errnum) (++(com)->delta_error_counts[errnum]) #ifdef SMP #define COM_LOCK() mtx_lock_spin(&cy_lock) #define COM_UNLOCK() mtx_unlock_spin(&cy_lock) #else #define COM_LOCK() #define COM_UNLOCK() #endif /* types. XXX - should be elsewhere */ typedef u_char bool_t; /* boolean */ /* queue of linear buffers */ struct lbq { u_char *l_head; /* next char to process */ u_char *l_tail; /* one past the last char to process */ struct lbq *l_next; /* next in queue */ bool_t l_queued; /* nonzero if queued */ }; /* com device structure */ struct com_s { u_char state; /* miscellaneous flag bits */ u_char etc; /* pending Embedded Transmit Command */ u_char extra_state; /* more flag bits, separate for order trick */ u_char gfrcr_image; /* copy of value read from GFRCR */ u_char mcr_dtr; /* MCR bit that is wired to DTR */ u_char mcr_image; /* copy of value written to MCR */ u_char mcr_rts; /* MCR bit that is wired to RTS */ int unit; /* unit number */ /* * The high level of the driver never reads status registers directly * because there would be too many side effects to handle conveniently. * Instead, it reads copies of the registers stored here by the * interrupt handler. */ u_char last_modem_status; /* last MSR read by intr handler */ u_char prev_modem_status; /* last MSR handled by high level */ u_char *ibuf; /* start of input buffer */ u_char *ibufend; /* end of input buffer */ u_char *ibufold; /* old input buffer, to be freed */ u_char *ihighwater; /* threshold in input buffer */ u_char *iptr; /* next free spot in input buffer */ int ibufsize; /* size of ibuf (not include error bytes) */ int ierroff; /* offset of error bytes in ibuf */ struct lbq obufq; /* head of queue of output buffers */ struct lbq obufs[2]; /* output buffers */ int cy_align; /* index for register alignment */ cy_addr cy_iobase; /* base address of this port's cyclom */ cy_addr iobase; /* base address of this port's cd1400 */ int mcr_rts_reg; /* cd1400 reg number of reg holding mcr_rts */ struct tty *tp; /* cross reference */ u_long bytes_in; /* statistics */ u_long bytes_out; u_int delta_error_counts[CE_NTYPES]; u_long error_counts[CE_NTYPES]; u_int recv_exception; /* exception chars received */ u_int mdm; /* modem signal changes */ #ifdef CyDebug u_int start_count; /* no. of calls to cystart() */ u_int start_real; /* no. of calls that did something */ #endif u_char car; /* CD1400 CAR shadow (if first unit in cd) */ u_char channel_control;/* CD1400 CCR control command shadow */ u_char cor[3]; /* CD1400 COR1-3 shadows */ u_char intr_enable; /* CD1400 SRER shadow */ /* * Data area for output buffers. Someday we should build the output * buffer queue without copying data. */ u_char obuf1[256]; u_char obuf2[256]; }; devclass_t cy_devclass; char cy_driver_name[] = "cy"; static void cd1400_channel_cmd(struct com_s *com, int cmd); static void cd1400_channel_cmd_wait(struct com_s *com); static void cd_etc(struct com_s *com, int etc); static int cd_getreg(struct com_s *com, int reg); static void cd_setreg(struct com_s *com, int reg, int val); static void cyinput(struct com_s *com); static int cyparam(struct tty *tp, struct termios *t); static void cypoll(void *arg); static void cysettimeout(void); static int cysetwater(struct com_s *com, speed_t speed); static int cyspeed(speed_t speed, u_long cy_clock, int *prescaler_io); static void cystart(struct tty *tp); static void comstop(struct tty *tp, int rw); static timeout_t cywakeup; static void disc_optim(struct tty *tp, struct termios *t, struct com_s *com); static t_break_t cybreak; static t_modem_t cymodem; static t_open_t cyopen; static t_close_t cyclose; #ifdef CyDebug void cystatus(int unit); #endif static struct mtx cy_lock; static int cy_inited; /* table and macro for fast conversion from a unit number to its com struct */ static struct com_s *p_cy_addr[NPORTS]; #define cy_addr(unit) (p_cy_addr[unit]) static u_int cy_events; /* input chars + weighted output completions */ static void *cy_fast_ih; static void *cy_slow_ih; static int cy_timeout; static int cy_timeouts_until_log; static struct callout_handle cy_timeout_handle = CALLOUT_HANDLE_INITIALIZER(&cy_timeout_handle); #ifdef CyDebug static u_int cd_inbs; static u_int cy_inbs; static u_int cd_outbs; static u_int cy_outbs; static u_int cy_svrr_probes; static u_int cy_timeouts; #endif static int cy_chip_offset[] = { 0x0000, 0x0400, 0x0800, 0x0c00, 0x0200, 0x0600, 0x0a00, 0x0e00, }; static int cy_nr_cd1400s[NCY]; static int cy_total_devices; #undef RxFifoThreshold static int volatile RxFifoThreshold = (CD1400_RX_FIFO_SIZE / 2); int cy_units(cy_addr cy_iobase, int cy_align) { int cyu; u_char firmware_version; int i; cy_addr iobase; for (cyu = 0; cyu < CY_MAX_CD1400s; ++cyu) { iobase = cy_iobase + (cy_chip_offset[cyu] << cy_align); /* wait for chip to become ready for new command */ for (i = 0; i < 10; i++) { DELAY(50); if (!cd_inb(iobase, CD1400_CCR, cy_align)) break; } /* clear the GFRCR register */ cd_outb(iobase, CD1400_GFRCR, cy_align, 0); /* issue a reset command */ cd_outb(iobase, CD1400_CCR, cy_align, CD1400_CCR_CMDRESET | CD1400_CCR_FULLRESET); /* XXX bogus initialization to avoid a gcc bug/warning. */ firmware_version = 0; /* wait for the CD1400 to initialize itself */ for (i = 0; i < 200; i++) { DELAY(50); /* retrieve firmware version */ firmware_version = cd_inb(iobase, CD1400_GFRCR, cy_align); if ((firmware_version & 0xf0) == 0x40) break; } /* * Anything in the 0x40-0x4F range is fine. * If one CD1400 is bad then we don't support higher * numbered good ones on this board. */ if ((firmware_version & 0xf0) != 0x40) break; } return (cyu); } void * cyattach_common(cy_addr cy_iobase, int cy_align) { int adapter; int cyu; u_char firmware_version; cy_addr iobase; int ncyu; int unit; struct tty *tp; while (cy_inited != 2) if (atomic_cmpset_int(&cy_inited, 0, 1)) { mtx_init(&cy_lock, cy_driver_name, NULL, MTX_SPIN); atomic_store_rel_int(&cy_inited, 2); } adapter = cy_total_devices; if ((u_int)adapter >= NCY) { printf( "cy%d: can't attach adapter: insufficient cy devices configured\n", adapter); return (NULL); } ncyu = cy_units(cy_iobase, cy_align); if (ncyu == 0) return (NULL); cy_nr_cd1400s[adapter] = ncyu; cy_total_devices++; unit = adapter * CY_MAX_PORTS; for (cyu = 0; cyu < ncyu; ++cyu) { int cdu; iobase = (cy_addr) (cy_iobase + (cy_chip_offset[cyu] << cy_align)); firmware_version = cd_inb(iobase, CD1400_GFRCR, cy_align); /* Set up a receive timeout period of than 1+ ms. */ cd_outb(iobase, CD1400_PPR, cy_align, howmany(CY_CLOCK(firmware_version) / CD1400_PPR_PRESCALER, 1000)); for (cdu = 0; cdu < CD1400_NO_OF_CHANNELS; ++cdu, ++unit) { struct com_s *com; int s; com = malloc(sizeof *com, M_DEVBUF, M_NOWAIT | M_ZERO); if (com == NULL) break; com->unit = unit; com->gfrcr_image = firmware_version; if (CY_RTS_DTR_SWAPPED(firmware_version)) { com->mcr_dtr = CD1400_MSVR1_RTS; com->mcr_rts = CD1400_MSVR2_DTR; com->mcr_rts_reg = CD1400_MSVR2; } else { com->mcr_dtr = CD1400_MSVR2_DTR; com->mcr_rts = CD1400_MSVR1_RTS; com->mcr_rts_reg = CD1400_MSVR1; } com->obufs[0].l_head = com->obuf1; com->obufs[1].l_head = com->obuf2; com->cy_align = cy_align; com->cy_iobase = cy_iobase; com->iobase = iobase; com->car = ~CD1400_CAR_CHAN; tp = com->tp = ttyalloc(); tp->t_open = cyopen; tp->t_close = cyclose; tp->t_oproc = cystart; tp->t_stop = comstop; tp->t_param = cyparam; tp->t_break = cybreak; tp->t_modem = cymodem; tp->t_sc = com; if (cysetwater(com, tp->t_init_in.c_ispeed) != 0) { free(com, M_DEVBUF); return (NULL); } s = spltty(); cy_addr(unit) = com; splx(s); if (cy_fast_ih == NULL) { swi_add(&tty_intr_event, "cy", cypoll, NULL, SWI_TTY, 0, &cy_fast_ih); swi_add(&clk_intr_event, "cy", cypoll, NULL, SWI_CLOCK, 0, &cy_slow_ih); } ttycreate(tp, TS_CALLOUT, "c%r%r", adapter, unit % CY_MAX_PORTS); } } /* ensure an edge for the next interrupt */ cy_outb(cy_iobase, CY_CLEAR_INTR, cy_align, 0); return (cy_addr(adapter * CY_MAX_PORTS)); } static int cyopen(struct tty *tp, struct cdev *dev) { struct com_s *com; int s; com = tp->t_sc; s = spltty(); /* * We jump to this label after all non-interrupted sleeps to pick * up any changes of the device state. */ /* Encode per-board unit in LIVR for access in intr routines. */ cd_setreg(com, CD1400_LIVR, (com->unit & CD1400_xIVR_CHAN) << CD1400_xIVR_CHAN_SHIFT); /* * Flush fifos. This requires a full channel reset which * also disables the transmitter and receiver. Recover * from this. */ cd1400_channel_cmd(com, CD1400_CCR_CMDRESET | CD1400_CCR_CHANRESET); cd1400_channel_cmd(com, com->channel_control); critical_enter(); COM_LOCK(); com->prev_modem_status = com->last_modem_status = cd_getreg(com, CD1400_MSVR2); cd_setreg(com, CD1400_SRER, com->intr_enable = CD1400_SRER_MDMCH | CD1400_SRER_RXDATA); COM_UNLOCK(); critical_exit(); cysettimeout(); return (0); } static void cyclose(struct tty *tp) { cy_addr iobase; struct com_s *com; int s; int unit; com = tp->t_sc; unit = com->unit; iobase = com->iobase; s = spltty(); /* XXX */ critical_enter(); COM_LOCK(); com->etc = ETC_NONE; cd_setreg(com, CD1400_COR2, com->cor[1] &= ~CD1400_COR2_ETC); COM_UNLOCK(); critical_exit(); cd_etc(com, CD1400_ETC_STOPBREAK); cd1400_channel_cmd(com, CD1400_CCR_CMDRESET | CD1400_CCR_FTF); { critical_enter(); COM_LOCK(); cd_setreg(com, CD1400_SRER, com->intr_enable = 0); COM_UNLOCK(); critical_exit(); tp = com->tp; if ((tp->t_cflag & HUPCL) /* * XXX we will miss any carrier drop between here and the * next open. Perhaps we should watch DCD even when the * port is closed; it is not sufficient to check it at * the next open because it might go up and down while * we're not watching. */ || (!tp->t_actout && !(com->prev_modem_status & CD1400_MSVR2_CD) && !(tp->t_init_in.c_cflag & CLOCAL)) || !(tp->t_state & TS_ISOPEN)) { (void)cymodem(tp, 0, SER_DTR); /* Disable receiver (leave transmitter enabled). */ com->channel_control = CD1400_CCR_CMDCHANCTL | CD1400_CCR_XMTEN | CD1400_CCR_RCVDIS; cd1400_channel_cmd(com, com->channel_control); ttydtrwaitstart(tp); } } tp->t_actout = FALSE; wakeup(&tp->t_actout); wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */ splx(s); } /* * This function: * a) needs to be called with COM_LOCK() held, and * b) needs to return with COM_LOCK() held. */ static void cyinput(struct com_s *com) { u_char *buf; int incc; u_char line_status; int recv_data; struct tty *tp; buf = com->ibuf; tp = com->tp; if (!(tp->t_state & TS_ISOPEN)) { cy_events -= (com->iptr - com->ibuf); com->iptr = com->ibuf; return; } if (tp->t_state & TS_CAN_BYPASS_L_RINT) { /* * Avoid the grotesquely inefficient lineswitch routine * (ttyinput) in "raw" mode. It usually takes about 450 * instructions (that's without canonical processing or echo!). * slinput is reasonably fast (usually 40 instructions plus * call overhead). */ do { /* * This may look odd, but it is using save-and-enable * semantics instead of the save-and-disable semantics * that are used everywhere else. */ COM_UNLOCK(); critical_exit(); incc = com->iptr - buf; if (tp->t_rawq.c_cc + incc > tp->t_ihiwat && (com->state & CS_RTS_IFLOW || tp->t_iflag & IXOFF) && !(tp->t_state & TS_TBLOCK)) ttyblock(tp); com->delta_error_counts[CE_TTY_BUF_OVERFLOW] += b_to_q((char *)buf, incc, &tp->t_rawq); buf += incc; tk_nin += incc; tk_rawcc += incc; tp->t_rawcc += incc; ttwakeup(tp); if (tp->t_state & TS_TTSTOP && (tp->t_iflag & IXANY || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) { tp->t_state &= ~TS_TTSTOP; tp->t_lflag &= ~FLUSHO; cystart(tp); } critical_enter(); COM_LOCK(); } while (buf < com->iptr); } else { do { /* * This may look odd, but it is using save-and-enable * semantics instead of the save-and-disable semantics * that are used everywhere else. */ COM_UNLOCK(); critical_exit(); line_status = buf[com->ierroff]; recv_data = *buf++; if (line_status & (CD1400_RDSR_BREAK | CD1400_RDSR_FE | CD1400_RDSR_OE | CD1400_RDSR_PE)) { if (line_status & CD1400_RDSR_BREAK) recv_data |= TTY_BI; if (line_status & CD1400_RDSR_FE) recv_data |= TTY_FE; if (line_status & CD1400_RDSR_OE) recv_data |= TTY_OE; if (line_status & CD1400_RDSR_PE) recv_data |= TTY_PE; } ttyld_rint(tp, recv_data); critical_enter(); COM_LOCK(); } while (buf < com->iptr); } cy_events -= (com->iptr - com->ibuf); com->iptr = com->ibuf; /* * There is now room for another low-level buffer full of input, * so enable RTS if it is now disabled and there is room in the * high-level buffer. */ if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & com->mcr_rts) && !(tp->t_state & TS_TBLOCK)) cd_setreg(com, com->mcr_rts_reg, com->mcr_image |= com->mcr_rts); } int cyintr(void *vcom) { struct com_s *basecom; int baseu; int cy_align; cy_addr cy_iobase; int cyu; cy_addr iobase; u_char status; int unit; COM_LOCK(); /* XXX could this be placed down lower in the loop? */ basecom = (struct com_s *)vcom; baseu = basecom->unit; cy_align = basecom->cy_align; cy_iobase = basecom->cy_iobase; unit = baseu / CY_MAX_PORTS; /* check each CD1400 in turn */ for (cyu = 0; cyu < cy_nr_cd1400s[unit]; ++cyu) { iobase = (cy_addr) (cy_iobase + (cy_chip_offset[cyu] << cy_align)); /* poll to see if it has any work */ status = cd_inb(iobase, CD1400_SVRR, cy_align); if (status == 0) continue; // XXX - FILTER_STRAY? #ifdef CyDebug ++cy_svrr_probes; #endif /* service requests as appropriate, giving priority to RX */ if (status & CD1400_SVRR_RXRDY) { struct com_s *com; u_int count; u_char *ioptr; u_char line_status; u_char recv_data; u_char serv_type; #ifdef PollMode u_char save_rir; #endif #ifdef PollMode save_rir = cd_inb(iobase, CD1400_RIR, cy_align); /* enter rx service */ cd_outb(iobase, CD1400_CAR, cy_align, save_rir); cy_addr(baseu + cyu * CD1400_NO_OF_CHANNELS)->car = save_rir & CD1400_CAR_CHAN; serv_type = cd_inb(iobase, CD1400_RIVR, cy_align); com = cy_addr(baseu + ((serv_type >> CD1400_xIVR_CHAN_SHIFT) & CD1400_xIVR_CHAN)); #else /* ack receive service */ serv_type = cy_inb(iobase, CY8_SVCACKR, cy_align); com = cy_addr(baseu + + ((serv_type >> CD1400_xIVR_CHAN_SHIFT) & CD1400_xIVR_CHAN)); #endif if (serv_type & CD1400_RIVR_EXCEPTION) { ++com->recv_exception; line_status = cd_inb(iobase, CD1400_RDSR, cy_align); /* break/unnattached error bits or real input? */ recv_data = cd_inb(iobase, CD1400_RDSR, cy_align); #ifndef SOFT_HOTCHAR if (line_status & CD1400_RDSR_SPECIAL && com->tp->t_hotchar != 0) swi_sched(cy_fast_ih, 0); #endif #if 1 /* XXX "intelligent" PFO error handling would break O error handling */ if (line_status & (CD1400_RDSR_PE|CD1400_RDSR_FE|CD1400_RDSR_BREAK)) { /* Don't store PE if IGNPAR and BI if IGNBRK, this hack allows "raw" tty optimization works even if IGN* is set. */ if ( com->tp == NULL || !(com->tp->t_state & TS_ISOPEN) || ((line_status & (CD1400_RDSR_PE|CD1400_RDSR_FE)) && (com->tp->t_iflag & IGNPAR)) || ((line_status & CD1400_RDSR_BREAK) && (com->tp->t_iflag & IGNBRK))) goto cont; if ( (line_status & (CD1400_RDSR_PE|CD1400_RDSR_FE)) && (com->tp->t_state & TS_CAN_BYPASS_L_RINT) && ((line_status & CD1400_RDSR_FE) || ((line_status & CD1400_RDSR_PE) && (com->tp->t_iflag & INPCK)))) recv_data = 0; } #endif /* 1 */ ++com->bytes_in; #ifdef SOFT_HOTCHAR if (com->tp->t_hotchar != 0 && recv_data == com->tp->t_hotchar) swi_sched(cy_fast_ih, 0); #endif ioptr = com->iptr; if (ioptr >= com->ibufend) CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW); else { if (com->tp != NULL && com->tp->t_do_timestamp) microtime(&com->tp->t_timestamp); ++cy_events; ioptr[0] = recv_data; ioptr[com->ierroff] = line_status; com->iptr = ++ioptr; if (ioptr == com->ihighwater && com->state & CS_RTS_IFLOW) cd_outb(iobase, com->mcr_rts_reg, cy_align, com->mcr_image &= ~com->mcr_rts); if (line_status & CD1400_RDSR_OE) CE_RECORD(com, CE_OVERRUN); } goto cont; } else { int ifree; count = cd_inb(iobase, CD1400_RDCR, cy_align); if (!count) goto cont; com->bytes_in += count; ioptr = com->iptr; ifree = com->ibufend - ioptr; if (count > ifree) { count -= ifree; cy_events += ifree; if (ifree != 0) { if (com->tp != NULL && com->tp->t_do_timestamp) microtime(&com->tp->t_timestamp); do { recv_data = cd_inb(iobase, CD1400_RDSR, cy_align); #ifdef SOFT_HOTCHAR if (com->tp->t_hotchar != 0 && recv_data == com->tp->t_hotchar) swi_sched(cy_fast_ih, 0); #endif ioptr[0] = recv_data; ioptr[com->ierroff] = 0; ++ioptr; } while (--ifree != 0); } com->delta_error_counts [CE_INTERRUPT_BUF_OVERFLOW] += count; do { recv_data = cd_inb(iobase, CD1400_RDSR, cy_align); #ifdef SOFT_HOTCHAR if (com->tp->t_hotchar != 0 && recv_data == com->tp->t_hotchar) swi_sched(cy_fast_ih, 0); #endif } while (--count != 0); } else { if (com->tp != NULL && com->tp->t_do_timestamp) microtime(&com->tp->t_timestamp); if (ioptr <= com->ihighwater && ioptr + count > com->ihighwater && com->state & CS_RTS_IFLOW) cd_outb(iobase, com->mcr_rts_reg, cy_align, com->mcr_image &= ~com->mcr_rts); cy_events += count; do { recv_data = cd_inb(iobase, CD1400_RDSR, cy_align); #ifdef SOFT_HOTCHAR if (com->tp->t_hotchar != 0 && recv_data == com->tp->t_hotchar) swi_sched(cy_fast_ih, 0); #endif ioptr[0] = recv_data; ioptr[com->ierroff] = 0; ++ioptr; } while (--count != 0); } com->iptr = ioptr; } cont: /* terminate service context */ #ifdef PollMode cd_outb(iobase, CD1400_RIR, cy_align, save_rir & ~(CD1400_RIR_RDIREQ | CD1400_RIR_RBUSY)); #else cd_outb(iobase, CD1400_EOSRR, cy_align, 0); #endif } if (status & CD1400_SVRR_MDMCH) { struct com_s *com; u_char modem_status; #ifdef PollMode u_char save_mir; #else u_char vector; #endif #ifdef PollMode save_mir = cd_inb(iobase, CD1400_MIR, cy_align); /* enter modem service */ cd_outb(iobase, CD1400_CAR, cy_align, save_mir); cy_addr(baseu + cyu * CD1400_NO_OF_CHANNELS)->car = save_mir & CD1400_CAR_CHAN; com = cy_addr(baseu + cyu * CD1400_NO_OF_CHANNELS + (save_mir & CD1400_MIR_CHAN)); #else /* ack modem service */ vector = cy_inb(iobase, CY8_SVCACKM, cy_align); com = cy_addr(baseu + ((vector >> CD1400_xIVR_CHAN_SHIFT) & CD1400_xIVR_CHAN)); #endif ++com->mdm; modem_status = cd_inb(iobase, CD1400_MSVR2, cy_align); if (modem_status != com->last_modem_status) { /* * Schedule high level to handle DCD changes. Note * that we don't use the delta bits anywhere. Some * UARTs mess them up, and it's easy to remember the * previous bits and calculate the delta. */ com->last_modem_status = modem_status; if (!(com->state & CS_CHECKMSR)) { cy_events += LOTS_OF_EVENTS; com->state |= CS_CHECKMSR; swi_sched(cy_fast_ih, 0); } #ifdef SOFT_CTS_OFLOW /* handle CTS change immediately for crisp flow ctl */ if (com->state & CS_CTS_OFLOW) { if (modem_status & CD1400_MSVR2_CTS) { com->state |= CS_ODEVREADY; if (com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY) && !(com->intr_enable & CD1400_SRER_TXRDY)) cd_outb(iobase, CD1400_SRER, cy_align, com->intr_enable = com->intr_enable & ~CD1400_SRER_TXMPTY | CD1400_SRER_TXRDY); } else { com->state &= ~CS_ODEVREADY; if (com->intr_enable & CD1400_SRER_TXRDY) cd_outb(iobase, CD1400_SRER, cy_align, com->intr_enable = com->intr_enable & ~CD1400_SRER_TXRDY | CD1400_SRER_TXMPTY); } } #endif } /* terminate service context */ #ifdef PollMode cd_outb(iobase, CD1400_MIR, cy_align, save_mir & ~(CD1400_MIR_RDIREQ | CD1400_MIR_RBUSY)); #else cd_outb(iobase, CD1400_EOSRR, cy_align, 0); #endif } if (status & CD1400_SVRR_TXRDY) { struct com_s *com; #ifdef PollMode u_char save_tir; #else u_char vector; #endif #ifdef PollMode save_tir = cd_inb(iobase, CD1400_TIR, cy_align); /* enter tx service */ cd_outb(iobase, CD1400_CAR, cy_align, save_tir); cy_addr(baseu + cyu * CD1400_NO_OF_CHANNELS)->car = save_tir & CD1400_CAR_CHAN; com = cy_addr(baseu + cyu * CD1400_NO_OF_CHANNELS + (save_tir & CD1400_TIR_CHAN)); #else /* ack transmit service */ vector = cy_inb(iobase, CY8_SVCACKT, cy_align); com = cy_addr(baseu + ((vector >> CD1400_xIVR_CHAN_SHIFT) & CD1400_xIVR_CHAN)); #endif if (com->etc != ETC_NONE) { if (com->intr_enable & CD1400_SRER_TXRDY) { /* * Here due to sloppy SRER_TXRDY * enabling. Ignore. Come back when * tx is empty. */ cd_outb(iobase, CD1400_SRER, cy_align, com->intr_enable = (com->intr_enable & ~CD1400_SRER_TXRDY) | CD1400_SRER_TXMPTY); goto terminate_tx_service; } switch (com->etc) { case CD1400_ETC_SENDBREAK: case CD1400_ETC_STOPBREAK: /* * Start the command. Come back on * next tx empty interrupt, hopefully * after command has been executed. */ cd_outb(iobase, CD1400_COR2, cy_align, com->cor[1] |= CD1400_COR2_ETC); cd_outb(iobase, CD1400_TDR, cy_align, CD1400_ETC_CMD); cd_outb(iobase, CD1400_TDR, cy_align, com->etc); if (com->etc == CD1400_ETC_SENDBREAK) com->etc = ETC_BREAK_STARTING; else com->etc = ETC_BREAK_ENDING; goto terminate_tx_service; case ETC_BREAK_STARTING: /* * BREAK is now on. Continue with * SRER_TXMPTY processing, hopefully * don't come back. */ com->etc = ETC_BREAK_STARTED; break; case ETC_BREAK_STARTED: /* * Came back due to sloppy SRER_TXMPTY * enabling. Hope again. */ break; case ETC_BREAK_ENDING: /* * BREAK is now off. Continue with * SRER_TXMPTY processing and don't * come back. The SWI handler will * restart tx interrupts if necessary. */ cd_outb(iobase, CD1400_COR2, cy_align, com->cor[1] &= ~CD1400_COR2_ETC); com->etc = ETC_BREAK_ENDED; if (!(com->state & CS_ODONE)) { cy_events += LOTS_OF_EVENTS; com->state |= CS_ODONE; swi_sched(cy_fast_ih, 0); } break; case ETC_BREAK_ENDED: /* * Shouldn't get here. Hope again. */ break; } } if (com->intr_enable & CD1400_SRER_TXMPTY) { if (!(com->extra_state & CSE_ODONE)) { cy_events += LOTS_OF_EVENTS; com->extra_state |= CSE_ODONE; swi_sched(cy_fast_ih, 0); } cd_outb(iobase, CD1400_SRER, cy_align, com->intr_enable &= ~CD1400_SRER_TXMPTY); goto terminate_tx_service; } if (com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { u_char *ioptr; u_int ocount; ioptr = com->obufq.l_head; ocount = com->obufq.l_tail - ioptr; if (ocount > CD1400_TX_FIFO_SIZE) ocount = CD1400_TX_FIFO_SIZE; com->bytes_out += ocount; do cd_outb(iobase, CD1400_TDR, cy_align, *ioptr++); while (--ocount != 0); com->obufq.l_head = ioptr; if (ioptr >= com->obufq.l_tail) { struct lbq *qp; qp = com->obufq.l_next; qp->l_queued = FALSE; qp = qp->l_next; if (qp != NULL) { com->obufq.l_head = qp->l_head; com->obufq.l_tail = qp->l_tail; com->obufq.l_next = qp; } else { /* output just completed */ com->state &= ~CS_BUSY; /* * The setting of CSE_ODONE may be * stale here. We currently only * use it when CS_BUSY is set, and * fixing it when we clear CS_BUSY * is easiest. */ if (com->extra_state & CSE_ODONE) { cy_events -= LOTS_OF_EVENTS; com->extra_state &= ~CSE_ODONE; } cd_outb(iobase, CD1400_SRER, cy_align, com->intr_enable = (com->intr_enable & ~CD1400_SRER_TXRDY) | CD1400_SRER_TXMPTY); } if (!(com->state & CS_ODONE)) { cy_events += LOTS_OF_EVENTS; com->state |= CS_ODONE; /* handle at high level ASAP */ swi_sched(cy_fast_ih, 0); } } } /* terminate service context */ terminate_tx_service: #ifdef PollMode cd_outb(iobase, CD1400_TIR, cy_align, save_tir & ~(CD1400_TIR_RDIREQ | CD1400_TIR_RBUSY)); #else cd_outb(iobase, CD1400_EOSRR, cy_align, 0); #endif } } /* ensure an edge for the next interrupt */ cy_outb(cy_iobase, CY_CLEAR_INTR, cy_align, 0); swi_sched(cy_slow_ih, SWI_DELAY); COM_UNLOCK(); return (FILTER_HANDLED); } static void cybreak(struct tty *tp, int sig) { struct com_s *com; com = tp->t_sc; if (sig) cd_etc(com, CD1400_ETC_SENDBREAK); else cd_etc(com, CD1400_ETC_STOPBREAK); } static void cypoll(void *arg) { int unit; #ifdef CyDebug ++cy_timeouts; #endif if (cy_events == 0) return; repeat: for (unit = 0; unit < NPORTS; ++unit) { struct com_s *com; int incc; struct tty *tp; com = cy_addr(unit); if (com == NULL) continue; tp = com->tp; if (tp == NULL) { /* * XXX forget any events related to closed devices * (actually never opened devices) so that we don't * loop. */ critical_enter(); COM_LOCK(); incc = com->iptr - com->ibuf; com->iptr = com->ibuf; if (com->state & CS_CHECKMSR) { incc += LOTS_OF_EVENTS; com->state &= ~CS_CHECKMSR; } cy_events -= incc; COM_UNLOCK(); critical_exit(); if (incc != 0) log(LOG_DEBUG, "cy%d: %d events for device with no tp\n", unit, incc); continue; } if (com->iptr != com->ibuf) { critical_enter(); COM_LOCK(); cyinput(com); COM_UNLOCK(); critical_exit(); } if (com->state & CS_CHECKMSR) { u_char delta_modem_status; critical_enter(); COM_LOCK(); cyinput(com); delta_modem_status = com->last_modem_status ^ com->prev_modem_status; com->prev_modem_status = com->last_modem_status; cy_events -= LOTS_OF_EVENTS; com->state &= ~CS_CHECKMSR; COM_UNLOCK(); critical_exit(); if (delta_modem_status & CD1400_MSVR2_CD) ttyld_modem(tp, com->prev_modem_status & CD1400_MSVR2_CD); } if (com->extra_state & CSE_ODONE) { critical_enter(); COM_LOCK(); cy_events -= LOTS_OF_EVENTS; com->extra_state &= ~CSE_ODONE; COM_UNLOCK(); critical_exit(); if (!(com->state & CS_BUSY)) { tp->t_state &= ~TS_BUSY; ttwwakeup(com->tp); } if (com->etc != ETC_NONE) { if (com->etc == ETC_BREAK_ENDED) com->etc = ETC_NONE; wakeup(&com->etc); } } if (com->state & CS_ODONE) { critical_enter(); COM_LOCK(); cy_events -= LOTS_OF_EVENTS; com->state &= ~CS_ODONE; COM_UNLOCK(); critical_exit(); ttyld_start(tp); } if (cy_events == 0) break; } if (cy_events >= LOTS_OF_EVENTS) goto repeat; } static int cyparam(struct tty *tp, struct termios *t) { int bits; int cflag; struct com_s *com; u_char cor_change; u_long cy_clock; int idivisor; int iflag; int iprescaler; int itimeout; int odivisor; int oprescaler; u_char opt; int s; com = tp->t_sc; /* check requested parameters */ cy_clock = CY_CLOCK(com->gfrcr_image); idivisor = cyspeed(t->c_ispeed, cy_clock, &iprescaler); if (idivisor <= 0) return (EINVAL); odivisor = cyspeed(t->c_ospeed != 0 ? t->c_ospeed : tp->t_ospeed, cy_clock, &oprescaler); if (odivisor <= 0) return (EINVAL); /* parameters are OK, convert them to the com struct and the device */ s = spltty(); if (t->c_ospeed == 0) (void)cymodem(tp, 0, SER_DTR); else (void)cymodem(tp, SER_DTR, 0); (void) cysetwater(com, t->c_ispeed); /* XXX we don't actually change the speed atomically. */ cd_setreg(com, CD1400_RBPR, idivisor); cd_setreg(com, CD1400_RCOR, iprescaler); cd_setreg(com, CD1400_TBPR, odivisor); cd_setreg(com, CD1400_TCOR, oprescaler); /* * channel control * receiver enable * transmitter enable (always set) */ cflag = t->c_cflag; opt = CD1400_CCR_CMDCHANCTL | CD1400_CCR_XMTEN | (cflag & CREAD ? CD1400_CCR_RCVEN : CD1400_CCR_RCVDIS); if (opt != com->channel_control) { com->channel_control = opt; cd1400_channel_cmd(com, opt); } #ifdef Smarts /* set special chars */ /* XXX if one is _POSIX_VDISABLE, can't use some others */ if (t->c_cc[VSTOP] != _POSIX_VDISABLE) cd_setreg(com, CD1400_SCHR1, t->c_cc[VSTOP]); if (t->c_cc[VSTART] != _POSIX_VDISABLE) cd_setreg(com, CD1400_SCHR2, t->c_cc[VSTART]); if (t->c_cc[VINTR] != _POSIX_VDISABLE) cd_setreg(com, CD1400_SCHR3, t->c_cc[VINTR]); if (t->c_cc[VSUSP] != _POSIX_VDISABLE) cd_setreg(com, CD1400_SCHR4, t->c_cc[VSUSP]); #endif /* * set channel option register 1 - * parity mode * stop bits * char length */ opt = 0; /* parity */ if (cflag & PARENB) { if (cflag & PARODD) opt |= CD1400_COR1_PARODD; opt |= CD1400_COR1_PARNORMAL; } iflag = t->c_iflag; if (!(iflag & INPCK)) opt |= CD1400_COR1_NOINPCK; bits = 1 + 1; /* stop bits */ if (cflag & CSTOPB) { ++bits; opt |= CD1400_COR1_STOP2; } /* char length */ switch (cflag & CSIZE) { case CS5: bits += 5; opt |= CD1400_COR1_CS5; break; case CS6: bits += 6; opt |= CD1400_COR1_CS6; break; case CS7: bits += 7; opt |= CD1400_COR1_CS7; break; default: bits += 8; opt |= CD1400_COR1_CS8; break; } cor_change = 0; if (opt != com->cor[0]) { cor_change |= CD1400_CCR_COR1; cd_setreg(com, CD1400_COR1, com->cor[0] = opt); } /* * Set receive time-out period, normally to max(one char time, 5 ms). */ itimeout = (1000 * bits + t->c_ispeed - 1) / t->c_ispeed; #ifdef SOFT_HOTCHAR #define MIN_RTP 1 #else #define MIN_RTP 5 #endif if (itimeout < MIN_RTP) itimeout = MIN_RTP; if (!(t->c_lflag & ICANON) && t->c_cc[VMIN] != 0 && t->c_cc[VTIME] != 0 && t->c_cc[VTIME] * 10 > itimeout) itimeout = t->c_cc[VTIME] * 10; if (itimeout > 255) itimeout = 255; cd_setreg(com, CD1400_RTPR, itimeout); /* * set channel option register 2 - * flow control */ opt = 0; #ifdef Smarts if (iflag & IXANY) opt |= CD1400_COR2_IXANY; if (iflag & IXOFF) opt |= CD1400_COR2_IXOFF; #endif #ifndef SOFT_CTS_OFLOW if (cflag & CCTS_OFLOW) opt |= CD1400_COR2_CCTS_OFLOW; #endif critical_enter(); COM_LOCK(); if (opt != com->cor[1]) { cor_change |= CD1400_CCR_COR2; cd_setreg(com, CD1400_COR2, com->cor[1] = opt); } COM_UNLOCK(); critical_exit(); /* * set channel option register 3 - * receiver FIFO interrupt threshold * flow control */ opt = RxFifoThreshold; #ifdef Smarts if (t->c_lflag & ICANON) opt |= CD1400_COR3_SCD34; /* detect INTR & SUSP chars */ if (iflag & IXOFF) /* detect and transparently handle START and STOP chars */ opt |= CD1400_COR3_FCT | CD1400_COR3_SCD12; #endif if (opt != com->cor[2]) { cor_change |= CD1400_CCR_COR3; cd_setreg(com, CD1400_COR3, com->cor[2] = opt); } /* notify the CD1400 if COR1-3 have changed */ if (cor_change) cd1400_channel_cmd(com, CD1400_CCR_CMDCORCHG | cor_change); /* * set channel option register 4 - * CR/NL processing * break processing * received exception processing */ opt = 0; if (iflag & IGNCR) opt |= CD1400_COR4_IGNCR; #ifdef Smarts /* * we need a new ttyinput() for this, as we don't want to * have ICRNL && INLCR being done in both layers, or to have * synchronisation problems */ if (iflag & ICRNL) opt |= CD1400_COR4_ICRNL; if (iflag & INLCR) opt |= CD1400_COR4_INLCR; #endif if (iflag & IGNBRK) opt |= CD1400_COR4_IGNBRK | CD1400_COR4_NOBRKINT; /* * The `-ignbrk -brkint parmrk' case is not handled by the hardware, * so only tell the hardware about -brkint if -parmrk. */ if (!(iflag & (BRKINT | PARMRK))) opt |= CD1400_COR4_NOBRKINT; #if 0 /* XXX using this "intelligence" breaks reporting of overruns. */ if (iflag & IGNPAR) opt |= CD1400_COR4_PFO_DISCARD; else { if (iflag & PARMRK) opt |= CD1400_COR4_PFO_ESC; else opt |= CD1400_COR4_PFO_NUL; } #else opt |= CD1400_COR4_PFO_EXCEPTION; #endif cd_setreg(com, CD1400_COR4, opt); /* * set channel option register 5 - */ opt = 0; if (iflag & ISTRIP) opt |= CD1400_COR5_ISTRIP; if (t->c_iflag & IEXTEN) /* enable LNEXT (e.g. ctrl-v quoting) handling */ opt |= CD1400_COR5_LNEXT; #ifdef Smarts if (t->c_oflag & ONLCR) opt |= CD1400_COR5_ONLCR; if (t->c_oflag & OCRNL) opt |= CD1400_COR5_OCRNL; #endif cd_setreg(com, CD1400_COR5, opt); /* * We always generate modem status change interrupts for CD changes. * Among other things, this is necessary to track TS_CARR_ON for * pstat to print even when the driver doesn't care. CD changes * should be rare so interrupts for them are not worth extra code to * avoid. We avoid interrupts for other modem status changes (except * for CTS changes when SOFT_CTS_OFLOW is configured) since this is * simplest and best. */ /* * set modem change option register 1 * generate modem interrupts on which 1 -> 0 input transitions * also controls auto-DTR output flow-control, which we don't use */ opt = CD1400_MCOR1_CDzd; #ifdef SOFT_CTS_OFLOW if (cflag & CCTS_OFLOW) opt |= CD1400_MCOR1_CTSzd; #endif cd_setreg(com, CD1400_MCOR1, opt); /* * set modem change option register 2 * generate modem interrupts on specific 0 -> 1 input transitions */ opt = CD1400_MCOR2_CDod; #ifdef SOFT_CTS_OFLOW if (cflag & CCTS_OFLOW) opt |= CD1400_MCOR2_CTSod; #endif cd_setreg(com, CD1400_MCOR2, opt); /* * XXX should have done this long ago, but there is too much state * to change all atomically. */ critical_enter(); COM_LOCK(); com->state &= ~CS_TTGO; if (!(tp->t_state & TS_TTSTOP)) com->state |= CS_TTGO; if (cflag & CRTS_IFLOW) { com->state |= CS_RTS_IFLOW; /* * If CS_RTS_IFLOW just changed from off to on, the change * needs to be propagated to CD1400_MSVR1_RTS. This isn't urgent, * so do it later by calling cystart() instead of repeating * a lot of code from cystart() here. */ } else if (com->state & CS_RTS_IFLOW) { com->state &= ~CS_RTS_IFLOW; /* * CS_RTS_IFLOW just changed from on to off. Force CD1400_MSVR1_RTS * on here, since cystart() won't do it later. */ cd_setreg(com, com->mcr_rts_reg, com->mcr_image |= com->mcr_rts); } /* * Set up state to handle output flow control. * XXX - worth handling MDMBUF (DCD) flow control at the lowest level? * Now has 10+ msec latency, while CTS flow has 50- usec latency. */ com->state |= CS_ODEVREADY; #ifdef SOFT_CTS_OFLOW com->state &= ~CS_CTS_OFLOW; if (cflag & CCTS_OFLOW) { com->state |= CS_CTS_OFLOW; if (!(com->last_modem_status & CD1400_MSVR2_CTS)) com->state &= ~CS_ODEVREADY; } #endif /* XXX shouldn't call functions while intrs are disabled. */ disc_optim(tp, t, com); #if 0 /* * Recover from fiddling with CS_TTGO. We used to call cyintr1() * unconditionally, but that defeated the careful discarding of * stale input in cyopen(). */ if (com->state >= (CS_BUSY | CS_TTGO)) cyintr1(com); #endif if (com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { if (!(com->intr_enable & CD1400_SRER_TXRDY)) cd_setreg(com, CD1400_SRER, com->intr_enable = (com->intr_enable & ~CD1400_SRER_TXMPTY) | CD1400_SRER_TXRDY); } else { if (com->intr_enable & CD1400_SRER_TXRDY) cd_setreg(com, CD1400_SRER, com->intr_enable = (com->intr_enable & ~CD1400_SRER_TXRDY) | CD1400_SRER_TXMPTY); } COM_UNLOCK(); critical_exit(); splx(s); cystart(tp); if (com->ibufold != NULL) { free(com->ibufold, M_DEVBUF); com->ibufold = NULL; } return (0); } static int cysetwater(struct com_s *com, speed_t speed) { int cp4ticks; u_char *ibuf; int ibufsize; struct tty *tp; /* * Make the buffer size large enough to handle a softtty interrupt * latency of about 2 ticks without loss of throughput or data * (about 3 ticks if input flow control is not used or not honoured, * but a bit less for CS5-CS7 modes). */ cp4ticks = speed / 10 / hz * 4; for (ibufsize = 128; ibufsize < cp4ticks;) ibufsize <<= 1; if (ibufsize == com->ibufsize) { return (0); } /* * Allocate input buffer. The extra factor of 2 in the size is * to allow for an error byte for each input byte. */ ibuf = malloc(2 * ibufsize, M_DEVBUF, M_NOWAIT); if (ibuf == NULL) { return (ENOMEM); } /* Initialize non-critical variables. */ com->ibufold = com->ibuf; com->ibufsize = ibufsize; tp = com->tp; if (tp != NULL) { tp->t_ififosize = 2 * ibufsize; tp->t_ispeedwat = (speed_t)-1; tp->t_ospeedwat = (speed_t)-1; } /* * Read current input buffer, if any. Continue with interrupts * disabled. */ critical_enter(); COM_LOCK(); if (com->iptr != com->ibuf) cyinput(com); /*- * Initialize critical variables, including input buffer watermarks. * The external device is asked to stop sending when the buffer * exactly reaches high water, or when the high level requests it. * The high level is notified immediately (rather than at a later * clock tick) when this watermark is reached. * The buffer size is chosen so the watermark should almost never * be reached. * The low watermark is invisibly 0 since the buffer is always * emptied all at once. */ com->iptr = com->ibuf = ibuf; com->ibufend = ibuf + ibufsize; com->ierroff = ibufsize; com->ihighwater = ibuf + 3 * ibufsize / 4; COM_UNLOCK(); critical_exit(); return (0); } static void cystart(struct tty *tp) { struct com_s *com; int s; #ifdef CyDebug bool_t started; #endif com = tp->t_sc; s = spltty(); #ifdef CyDebug ++com->start_count; started = FALSE; #endif critical_enter(); COM_LOCK(); if (tp->t_state & TS_TTSTOP) { com->state &= ~CS_TTGO; if (com->intr_enable & CD1400_SRER_TXRDY) cd_setreg(com, CD1400_SRER, com->intr_enable = (com->intr_enable & ~CD1400_SRER_TXRDY) | CD1400_SRER_TXMPTY); } else { com->state |= CS_TTGO; if (com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY) && !(com->intr_enable & CD1400_SRER_TXRDY)) cd_setreg(com, CD1400_SRER, com->intr_enable = (com->intr_enable & ~CD1400_SRER_TXMPTY) | CD1400_SRER_TXRDY); } if (tp->t_state & TS_TBLOCK) { if (com->mcr_image & com->mcr_rts && com->state & CS_RTS_IFLOW) #if 0 outb(com->modem_ctl_port, com->mcr_image &= ~CD1400_MSVR1_RTS); #else cd_setreg(com, com->mcr_rts_reg, com->mcr_image &= ~com->mcr_rts); #endif } else { if (!(com->mcr_image & com->mcr_rts) && com->iptr < com->ihighwater && com->state & CS_RTS_IFLOW) #if 0 outb(com->modem_ctl_port, com->mcr_image |= CD1400_MSVR1_RTS); #else cd_setreg(com, com->mcr_rts_reg, com->mcr_image |= com->mcr_rts); #endif } COM_UNLOCK(); critical_exit(); if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { ttwwakeup(tp); splx(s); return; } if (tp->t_outq.c_cc != 0) { struct lbq *qp; struct lbq *next; if (!com->obufs[0].l_queued) { #ifdef CyDebug started = TRUE; #endif com->obufs[0].l_tail = com->obuf1 + q_to_b(&tp->t_outq, com->obuf1, sizeof com->obuf1); com->obufs[0].l_next = NULL; com->obufs[0].l_queued = TRUE; critical_enter(); COM_LOCK(); if (com->state & CS_BUSY) { qp = com->obufq.l_next; while ((next = qp->l_next) != NULL) qp = next; qp->l_next = &com->obufs[0]; } else { com->obufq.l_head = com->obufs[0].l_head; com->obufq.l_tail = com->obufs[0].l_tail; com->obufq.l_next = &com->obufs[0]; com->state |= CS_BUSY; if (com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) cd_setreg(com, CD1400_SRER, com->intr_enable = (com->intr_enable & ~CD1400_SRER_TXMPTY) | CD1400_SRER_TXRDY); } COM_UNLOCK(); critical_exit(); } if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) { #ifdef CyDebug started = TRUE; #endif com->obufs[1].l_tail = com->obuf2 + q_to_b(&tp->t_outq, com->obuf2, sizeof com->obuf2); com->obufs[1].l_next = NULL; com->obufs[1].l_queued = TRUE; critical_enter(); COM_LOCK(); if (com->state & CS_BUSY) { qp = com->obufq.l_next; while ((next = qp->l_next) != NULL) qp = next; qp->l_next = &com->obufs[1]; } else { com->obufq.l_head = com->obufs[1].l_head; com->obufq.l_tail = com->obufs[1].l_tail; com->obufq.l_next = &com->obufs[1]; com->state |= CS_BUSY; if (com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) cd_setreg(com, CD1400_SRER, com->intr_enable = (com->intr_enable & ~CD1400_SRER_TXMPTY) | CD1400_SRER_TXRDY); } COM_UNLOCK(); critical_exit(); } tp->t_state |= TS_BUSY; } #ifdef CyDebug if (started) ++com->start_real; #endif #if 0 critical_enter(); COM_LOCK(); if (com->state >= (CS_BUSY | CS_TTGO)) cyintr1(com); /* fake interrupt to start output */ COM_UNLOCK(); critical_exit(); #endif ttwwakeup(tp); splx(s); } static void comstop(struct tty *tp, int rw) { struct com_s *com; bool_t wakeup_etc; com = tp->t_sc; wakeup_etc = FALSE; critical_enter(); COM_LOCK(); if (rw & FWRITE) { com->obufs[0].l_queued = FALSE; com->obufs[1].l_queued = FALSE; if (com->extra_state & CSE_ODONE) { cy_events -= LOTS_OF_EVENTS; com->extra_state &= ~CSE_ODONE; if (com->etc != ETC_NONE) { if (com->etc == ETC_BREAK_ENDED) com->etc = ETC_NONE; wakeup_etc = TRUE; } } com->tp->t_state &= ~TS_BUSY; if (com->state & CS_ODONE) cy_events -= LOTS_OF_EVENTS; com->state &= ~(CS_ODONE | CS_BUSY); } if (rw & FREAD) { /* XXX no way to reset only input fifo. */ cy_events -= (com->iptr - com->ibuf); com->iptr = com->ibuf; } COM_UNLOCK(); critical_exit(); if (wakeup_etc) wakeup(&com->etc); if (rw & FWRITE && com->etc == ETC_NONE) cd1400_channel_cmd(com, CD1400_CCR_CMDRESET | CD1400_CCR_FTF); cystart(tp); } static int cymodem(struct tty *tp, int sigon, int sigoff) { struct com_s *com; int mcr; int msr; com = tp->t_sc; if (sigon == 0 && sigoff == 0) { sigon = 0; mcr = com->mcr_image; if (mcr & com->mcr_dtr) sigon |= SER_DTR; if (mcr & com->mcr_rts) /* XXX wired on for Cyclom-8Ys */ sigon |= SER_RTS; /* * We must read the modem status from the hardware because * we don't generate modem status change interrupts for all * changes, so com->prev_modem_status is not guaranteed to * be up to date. This is safe, unlike for sio, because * reading the status register doesn't clear pending modem * status change interrupts. */ msr = cd_getreg(com, CD1400_MSVR2); if (msr & CD1400_MSVR2_CTS) sigon |= SER_CTS; if (msr & CD1400_MSVR2_CD) sigon |= SER_DCD; if (msr & CD1400_MSVR2_DSR) sigon |= SER_DSR; if (msr & CD1400_MSVR2_RI) /* XXX not connected except for Cyclom-16Y? */ sigon |= SER_RI; return (sigon); } mcr = com->mcr_image; if (sigon & SER_DTR) mcr |= com->mcr_dtr; if (sigoff & SER_DTR) mcr &= ~com->mcr_dtr; if (sigon & SER_RTS) mcr |= com->mcr_rts; if (sigoff & SER_RTS) mcr &= ~com->mcr_rts; critical_enter(); COM_LOCK(); com->mcr_image = mcr; cd_setreg(com, CD1400_MSVR1, mcr); cd_setreg(com, CD1400_MSVR2, mcr); COM_UNLOCK(); critical_exit(); return (0); } static void cysettimeout() { struct com_s *com; bool_t someopen; int unit; /* * Set our timeout period to 1 second if no polled devices are open. * Otherwise set it to max(1/200, 1/hz). * Enable timeouts iff some device is open. */ untimeout(cywakeup, (void *)NULL, cy_timeout_handle); cy_timeout = hz; someopen = FALSE; for (unit = 0; unit < NPORTS; ++unit) { com = cy_addr(unit); if (com != NULL && com->tp != NULL && com->tp->t_state & TS_ISOPEN) { someopen = TRUE; } } if (someopen) { cy_timeouts_until_log = hz / cy_timeout; cy_timeout_handle = timeout(cywakeup, (void *)NULL, cy_timeout); } else { /* Flush error messages, if any. */ cy_timeouts_until_log = 1; cywakeup((void *)NULL); untimeout(cywakeup, (void *)NULL, cy_timeout_handle); } } static void cywakeup(void *chan) { struct com_s *com; int unit; cy_timeout_handle = timeout(cywakeup, (void *)NULL, cy_timeout); /* * Check for and log errors, but not too often. */ if (--cy_timeouts_until_log > 0) return; cy_timeouts_until_log = hz / cy_timeout; for (unit = 0; unit < NPORTS; ++unit) { int errnum; com = cy_addr(unit); if (com == NULL) continue; for (errnum = 0; errnum < CE_NTYPES; ++errnum) { u_int delta; u_long total; critical_enter(); COM_LOCK(); delta = com->delta_error_counts[errnum]; com->delta_error_counts[errnum] = 0; COM_UNLOCK(); critical_exit(); if (delta == 0) continue; total = com->error_counts[errnum] += delta; log(LOG_ERR, "cy%d: %u more %s%s (total %lu)\n", unit, delta, error_desc[errnum], delta == 1 ? "" : "s", total); } } } static void disc_optim(struct tty *tp, struct termios *t, struct com_s *com) { #ifndef SOFT_HOTCHAR u_char opt; #endif ttyldoptim(tp); #ifndef SOFT_HOTCHAR opt = com->cor[2] & ~CD1400_COR3_SCD34; if (com->tp->t_hotchar != 0) { cd_setreg(com, CD1400_SCHR3, com->tp->t_hotchar); cd_setreg(com, CD1400_SCHR4, com->tp->t_hotchar); opt |= CD1400_COR3_SCD34; } if (opt != com->cor[2]) { cd_setreg(com, CD1400_COR3, com->cor[2] = opt); cd1400_channel_cmd(com, CD1400_CCR_CMDCORCHG | CD1400_CCR_COR3); } #endif } #ifdef Smarts /* standard line discipline input routine */ int cyinput(int c, struct tty *tp) { /* XXX duplicate ttyinput(), but without the IXOFF/IXON/ISTRIP/IPARMRK * bits, as they are done by the CD1400. Hardly worth the effort, * given that high-throughput session are raw anyhow. */ } #endif /* Smarts */ static int cyspeed(speed_t speed, u_long cy_clock, int *prescaler_io) { int actual; int error; int divider; int prescaler; int prescaler_unit; if (speed == 0) return (0); if (speed < 0 || speed > 150000) return (-1); /* determine which prescaler to use */ for (prescaler_unit = 4, prescaler = 2048; prescaler_unit; prescaler_unit--, prescaler >>= 2) { if (cy_clock / prescaler / speed > 63) break; } divider = (cy_clock / prescaler * 2 / speed + 1) / 2; /* round off */ if (divider > 255) divider = 255; actual = cy_clock/prescaler/divider; /* 10 times error in percent: */ error = ((actual - (long)speed) * 2000 / (long)speed + 1) / 2; /* 3.0% max error tolerance */ if (error < -30 || error > 30) return (-1); *prescaler_io = prescaler_unit; return (divider); } static void cd1400_channel_cmd(struct com_s *com, int cmd) { cd1400_channel_cmd_wait(com); cd_setreg(com, CD1400_CCR, cmd); cd1400_channel_cmd_wait(com); } static void cd1400_channel_cmd_wait(struct com_s *com) { struct timeval start; struct timeval tv; long usec; if (cd_getreg(com, CD1400_CCR) == 0) return; microtime(&start); for (;;) { if (cd_getreg(com, CD1400_CCR) == 0) return; microtime(&tv); usec = 1000000 * (tv.tv_sec - start.tv_sec) + tv.tv_usec - start.tv_usec; if (usec >= 5000) { log(LOG_ERR, "cy%d: channel command timeout (%ld usec)\n", com->unit, usec); return; } } } static void cd_etc(struct com_s *com, int etc) { /* * We can't change the hardware's ETC state while there are any * characters in the tx fifo, since those characters would be * interpreted as commands! Unputting characters from the fifo * is difficult, so we wait up to 12 character times for the fifo * to drain. The command will be delayed for up to 2 character * times for the tx to become empty. Unputting characters from * the tx holding and shift registers is impossible, so we wait * for the tx to become empty so that the command is sure to be * executed soon after we issue it. */ critical_enter(); COM_LOCK(); if (com->etc == etc) goto wait; if ((etc == CD1400_ETC_SENDBREAK && (com->etc == ETC_BREAK_STARTING || com->etc == ETC_BREAK_STARTED)) || (etc == CD1400_ETC_STOPBREAK && (com->etc == ETC_BREAK_ENDING || com->etc == ETC_BREAK_ENDED || com->etc == ETC_NONE))) { COM_UNLOCK(); critical_exit(); return; } com->etc = etc; cd_setreg(com, CD1400_SRER, com->intr_enable = (com->intr_enable & ~CD1400_SRER_TXRDY) | CD1400_SRER_TXMPTY); wait: COM_UNLOCK(); critical_exit(); while (com->etc == etc && tsleep(&com->etc, TTIPRI | PCATCH, "cyetc", 0) == 0) continue; } static int cd_getreg(struct com_s *com, int reg) { struct com_s *basecom; u_char car; int cy_align; cy_addr iobase; #ifdef SMP int need_unlock; #endif int val; basecom = cy_addr(com->unit & ~(CD1400_NO_OF_CHANNELS - 1)); car = com->unit & CD1400_CAR_CHAN; cy_align = com->cy_align; iobase = com->iobase; critical_enter(); #ifdef SMP need_unlock = 0; if (!mtx_owned(&cy_lock)) { COM_LOCK(); need_unlock = 1; } #endif if (basecom->car != car) cd_outb(iobase, CD1400_CAR, cy_align, basecom->car = car); val = cd_inb(iobase, reg, cy_align); #ifdef SMP if (need_unlock) COM_UNLOCK(); #endif critical_exit(); return (val); } static void cd_setreg(struct com_s *com, int reg, int val) { struct com_s *basecom; u_char car; int cy_align; cy_addr iobase; #ifdef SMP int need_unlock; #endif basecom = cy_addr(com->unit & ~(CD1400_NO_OF_CHANNELS - 1)); car = com->unit & CD1400_CAR_CHAN; cy_align = com->cy_align; iobase = com->iobase; critical_enter(); #ifdef SMP need_unlock = 0; if (!mtx_owned(&cy_lock)) { COM_LOCK(); need_unlock = 1; } #endif if (basecom->car != car) cd_outb(iobase, CD1400_CAR, cy_align, basecom->car = car); cd_outb(iobase, reg, cy_align, val); #ifdef SMP if (need_unlock) COM_UNLOCK(); #endif critical_exit(); } #ifdef CyDebug /* useful in ddb */ void cystatus(int unit) { struct com_s *com; cy_addr iobase; u_int ocount; struct tty *tp; com = cy_addr(unit); printf("info for channel %d\n", unit); printf("------------------\n"); printf("total cyclom service probes:\t%d\n", cy_svrr_probes); printf("calls to upper layer:\t\t%d\n", cy_timeouts); if (com == NULL) return; iobase = com->iobase; printf("\n"); printf("cd1400 base address:\\tt%p\n", iobase); printf("saved channel_control:\t\t0x%02x\n", com->channel_control); printf("saved cor1-3:\t\t\t0x%02x 0x%02x 0x%02x\n", com->cor[0], com->cor[1], com->cor[2]); printf("service request enable reg:\t0x%02x (0x%02x cached)\n", cd_getreg(com, CD1400_SRER), com->intr_enable); printf("service request register:\t0x%02x\n", cd_inb(iobase, CD1400_SVRR, com->cy_align)); printf("modem status:\t\t\t0x%02x (0x%02x cached)\n", cd_getreg(com, CD1400_MSVR2), com->prev_modem_status); printf("rx/tx/mdm interrupt registers:\t0x%02x 0x%02x 0x%02x\n", cd_inb(iobase, CD1400_RIR, com->cy_align), cd_inb(iobase, CD1400_TIR, com->cy_align), cd_inb(iobase, CD1400_MIR, com->cy_align)); printf("\n"); printf("com state:\t\t\t0x%02x\n", com->state); printf("calls to cystart():\t\t%d (%d useful)\n", com->start_count, com->start_real); printf("rx buffer chars free:\t\t%d\n", com->iptr - com->ibuf); ocount = 0; if (com->obufs[0].l_queued) ocount += com->obufs[0].l_tail - com->obufs[0].l_head; if (com->obufs[1].l_queued) ocount += com->obufs[1].l_tail - com->obufs[1].l_head; printf("tx buffer chars:\t\t%u\n", ocount); printf("received chars:\t\t\t%d\n", com->bytes_in); printf("received exceptions:\t\t%d\n", com->recv_exception); printf("modem signal deltas:\t\t%d\n", com->mdm); printf("transmitted chars:\t\t%d\n", com->bytes_out); printf("\n"); tp = com->tp; if (tp != NULL) { printf("tty state:\t\t\t0x%08x\n", tp->t_state); printf( "upper layer queue lengths:\t%d raw, %d canon, %d output\n", tp->t_rawq.c_cc, tp->t_canq.c_cc, tp->t_outq.c_cc); } else printf("tty state:\t\t\tclosed\n"); } #endif /* CyDebug */