sio.c revision 67551
151078Speter/*- 251078Speter * Copyright (c) 1991 The Regents of the University of California. 351078Speter * All rights reserved. 451078Speter * 551078Speter * Redistribution and use in source and binary forms, with or without 651078Speter * modification, are permitted provided that the following conditions 751078Speter * are met: 851078Speter * 1. Redistributions of source code must retain the above copyright 951078Speter * notice, this list of conditions and the following disclaimer. 1051078Speter * 2. Redistributions in binary form must reproduce the above copyright 1151078Speter * notice, this list of conditions and the following disclaimer in the 1251078Speter * documentation and/or other materials provided with the distribution. 1351078Speter * 3. All advertising materials mentioning features or use of this software 1451078Speter * must display the following acknowledgement: 1551078Speter * This product includes software developed by the University of 1651078Speter * California, Berkeley and its contributors. 1751078Speter * 4. Neither the name of the University nor the names of its contributors 1851078Speter * may be used to endorse or promote products derived from this software 1951078Speter * without specific prior written permission. 2051078Speter * 2151078Speter * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2251078Speter * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2351078Speter * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2451078Speter * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2551078Speter * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2651078Speter * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2751078Speter * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2851078Speter * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2951078Speter * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3051078Speter * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3151078Speter * SUCH DAMAGE. 3251078Speter * 3351078Speter * $FreeBSD: head/sys/dev/sio/sio.c 67551 2000-10-25 05:19:40Z jhb $ 3451078Speter * from: @(#)com.c 7.5 (Berkeley) 5/16/91 3551078Speter * from: i386/isa sio.c,v 1.234 3651078Speter */ 3751078Speter 3851078Speter#include "opt_comconsole.h" 3951078Speter#include "opt_compat.h" 4051078Speter#include "opt_ddb.h" 4151078Speter#include "opt_sio.h" 4254386Simp#include "card.h" 4358885Simp#include "pci.h" 4451078Speter#include "sio.h" 4551078Speter 4651078Speter/* 4751078Speter * Serial driver, based on 386BSD-0.1 com driver. 4851078Speter * Mostly rewritten to use pseudo-DMA. 4951078Speter * Works for National Semiconductor NS8250-NS16550AF UARTs. 5051078Speter * COM driver, based on HP dca driver. 5151078Speter * 5251078Speter * Changes for PC-Card integration: 5351078Speter * - Added PC-Card driver table and handlers 5451078Speter */ 5551078Speter#include <sys/param.h> 5665822Sjhb#include <sys/bus.h> 5751078Speter#include <sys/systm.h> 5851078Speter#include <sys/reboot.h> 5951078Speter#include <sys/malloc.h> 6051078Speter#include <sys/tty.h> 6151078Speter#include <sys/proc.h> 6251078Speter#include <sys/module.h> 6351078Speter#include <sys/conf.h> 6451078Speter#include <sys/dkstat.h> 6551078Speter#include <sys/fcntl.h> 6651078Speter#include <sys/interrupt.h> 6766698Sjhb#include <sys/ipl.h> 6851078Speter#include <sys/kernel.h> 6951078Speter#include <sys/syslog.h> 7051078Speter#include <sys/sysctl.h> 7151078Speter#include <sys/bus.h> 7260471Snyan#include <machine/bus_pio.h> 7351078Speter#include <machine/bus.h> 7451078Speter#include <sys/rman.h> 7558377Sphk#include <sys/timetc.h> 7651078Speter#include <sys/timepps.h> 7751078Speter 7851078Speter#include <isa/isareg.h> 7951078Speter#include <isa/isavar.h> 8058885Simp#if NPCI > 0 8158885Simp#include <pci/pcireg.h> 8258885Simp#include <pci/pcivar.h> 8358885Simp#endif 8451078Speter#include <machine/lock.h> 8551078Speter 8651078Speter#include <machine/clock.h> 8751078Speter#ifndef SMP 8851078Speter#include <machine/lock.h> 8951078Speter#endif 9051078Speter#include <machine/resource.h> 9151078Speter 9251078Speter#include <isa/sioreg.h> 9351078Speter 9451078Speter#ifdef COM_ESP 9551078Speter#include <isa/ic/esp.h> 9651078Speter#endif 9751078Speter#include <isa/ic/ns16550.h> 9851078Speter 9965557Sjasone/* XXX - this is ok because we only do sio fast interrupts on i386 */ 10051078Speter#ifndef __i386__ 10151078Speter#define disable_intr() 10251078Speter#define enable_intr() 10351078Speter#endif 10451078Speter 10551078Speter#define LOTS_OF_EVENTS 64 /* helps separate urgent events from input */ 10651078Speter 10751078Speter#define CALLOUT_MASK 0x80 10851078Speter#define CONTROL_MASK 0x60 10951078Speter#define CONTROL_INIT_STATE 0x20 11051078Speter#define CONTROL_LOCK_STATE 0x40 11151078Speter#define DEV_TO_UNIT(dev) (MINOR_TO_UNIT(minor(dev))) 11251078Speter#define MINOR_MAGIC_MASK (CALLOUT_MASK | CONTROL_MASK) 11351078Speter#define MINOR_TO_UNIT(mynor) ((mynor) & ~MINOR_MAGIC_MASK) 11451078Speter 11551078Speter#ifdef COM_MULTIPORT 11651078Speter/* checks in flags for multiport and which is multiport "master chip" 11751078Speter * for a given card 11851078Speter */ 11951078Speter#define COM_ISMULTIPORT(flags) ((flags) & 0x01) 12051078Speter#define COM_MPMASTER(flags) (((flags) >> 8) & 0x0ff) 12151078Speter#define COM_NOTAST4(flags) ((flags) & 0x04) 12251078Speter#endif /* COM_MULTIPORT */ 12351078Speter 12451078Speter#define COM_CONSOLE(flags) ((flags) & 0x10) 12551078Speter#define COM_FORCECONSOLE(flags) ((flags) & 0x20) 12651078Speter#define COM_LLCONSOLE(flags) ((flags) & 0x40) 12751078Speter#define COM_DEBUGGER(flags) ((flags) & 0x80) 12851078Speter#define COM_LOSESOUTINTS(flags) ((flags) & 0x08) 12951078Speter#define COM_NOFIFO(flags) ((flags) & 0x02) 13051078Speter#define COM_ST16650A(flags) ((flags) & 0x20000) 13151078Speter#define COM_C_NOPROBE (0x40000) 13251078Speter#define COM_NOPROBE(flags) ((flags) & COM_C_NOPROBE) 13351078Speter#define COM_C_IIR_TXRDYBUG (0x80000) 13451078Speter#define COM_IIR_TXRDYBUG(flags) ((flags) & COM_C_IIR_TXRDYBUG) 13551078Speter#define COM_FIFOSIZE(flags) (((flags) & 0xff000000) >> 24) 13651078Speter 13751078Speter#define com_scr 7 /* scratch register for 16450-16550 (R/W) */ 13851078Speter 13960471Snyan#define sio_getreg(com, off) \ 14060471Snyan (bus_space_read_1((com)->bst, (com)->bsh, (off))) 14160471Snyan#define sio_setreg(com, off, value) \ 14260471Snyan (bus_space_write_1((com)->bst, (com)->bsh, (off), (value))) 14360471Snyan 14451078Speter/* 14551078Speter * com state bits. 14651078Speter * (CS_BUSY | CS_TTGO) and (CS_BUSY | CS_TTGO | CS_ODEVREADY) must be higher 14751078Speter * than the other bits so that they can be tested as a group without masking 14851078Speter * off the low bits. 14951078Speter * 15051078Speter * The following com and tty flags correspond closely: 15151078Speter * CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and 15253344Speter * comstop()) 15351078Speter * CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart()) 15451078Speter * CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam()) 15551078Speter * CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam()) 15651078Speter * TS_FLUSH is not used. 15751078Speter * XXX I think TIOCSETA doesn't clear TS_TTSTOP when it clears IXON. 15851078Speter * XXX CS_*FLOW should be CF_*FLOW in com->flags (control flags not state). 15951078Speter */ 16051078Speter#define CS_BUSY 0x80 /* output in progress */ 16151078Speter#define CS_TTGO 0x40 /* output not stopped by XOFF */ 16251078Speter#define CS_ODEVREADY 0x20 /* external device h/w ready (CTS) */ 16351078Speter#define CS_CHECKMSR 1 /* check of MSR scheduled */ 16451078Speter#define CS_CTS_OFLOW 2 /* use CTS output flow control */ 16551078Speter#define CS_DTR_OFF 0x10 /* DTR held off */ 16651078Speter#define CS_ODONE 4 /* output completed */ 16751078Speter#define CS_RTS_IFLOW 8 /* use RTS input flow control */ 16851078Speter#define CSE_BUSYCHECK 1 /* siobusycheck() scheduled */ 16951078Speter 17051078Speterstatic char const * const error_desc[] = { 17151078Speter#define CE_OVERRUN 0 17251078Speter "silo overflow", 17351078Speter#define CE_INTERRUPT_BUF_OVERFLOW 1 17451078Speter "interrupt-level buffer overflow", 17551078Speter#define CE_TTY_BUF_OVERFLOW 2 17651078Speter "tty-level buffer overflow", 17751078Speter}; 17851078Speter 17951078Speter#define CE_NTYPES 3 18051078Speter#define CE_RECORD(com, errnum) (++(com)->delta_error_counts[errnum]) 18151078Speter 18251078Speter/* types. XXX - should be elsewhere */ 18351078Spetertypedef u_int Port_t; /* hardware port */ 18451078Spetertypedef u_char bool_t; /* boolean */ 18551078Speter 18651078Speter/* queue of linear buffers */ 18751078Speterstruct lbq { 18851078Speter u_char *l_head; /* next char to process */ 18951078Speter u_char *l_tail; /* one past the last char to process */ 19051078Speter struct lbq *l_next; /* next in queue */ 19151078Speter bool_t l_queued; /* nonzero if queued */ 19251078Speter}; 19351078Speter 19451078Speter/* com device structure */ 19551078Speterstruct com_s { 19651078Speter u_int flags; /* Copy isa device flags */ 19751078Speter u_char state; /* miscellaneous flag bits */ 19851078Speter bool_t active_out; /* nonzero if the callout device is open */ 19951078Speter u_char cfcr_image; /* copy of value written to CFCR */ 20051078Speter#ifdef COM_ESP 20151078Speter bool_t esp; /* is this unit a hayes esp board? */ 20251078Speter#endif 20351078Speter u_char extra_state; /* more flag bits, separate for order trick */ 20451078Speter u_char fifo_image; /* copy of value written to FIFO */ 20551078Speter bool_t hasfifo; /* nonzero for 16550 UARTs */ 20651078Speter bool_t st16650a; /* Is a Startech 16650A or RTS/CTS compat */ 20751078Speter bool_t loses_outints; /* nonzero if device loses output interrupts */ 20851078Speter u_char mcr_image; /* copy of value written to MCR */ 20951078Speter#ifdef COM_MULTIPORT 21051078Speter bool_t multiport; /* is this unit part of a multiport device? */ 21151078Speter#endif /* COM_MULTIPORT */ 21251078Speter bool_t no_irq; /* nonzero if irq is not attached */ 21351078Speter bool_t gone; /* hardware disappeared */ 21451078Speter bool_t poll; /* nonzero if polling is required */ 21551078Speter bool_t poll_output; /* nonzero if polling for output is required */ 21651078Speter int unit; /* unit number */ 21751078Speter int dtr_wait; /* time to hold DTR down on close (* 1/hz) */ 21851078Speter u_int tx_fifo_size; 21951078Speter u_int wopeners; /* # processes waiting for DCD in open() */ 22051078Speter 22151078Speter /* 22251078Speter * The high level of the driver never reads status registers directly 22351078Speter * because there would be too many side effects to handle conveniently. 22451078Speter * Instead, it reads copies of the registers stored here by the 22551078Speter * interrupt handler. 22651078Speter */ 22751078Speter u_char last_modem_status; /* last MSR read by intr handler */ 22851078Speter u_char prev_modem_status; /* last MSR handled by high level */ 22951078Speter 23051078Speter u_char hotchar; /* ldisc-specific char to be handled ASAP */ 23151078Speter u_char *ibuf; /* start of input buffer */ 23251078Speter u_char *ibufend; /* end of input buffer */ 23351078Speter u_char *ibufold; /* old input buffer, to be freed */ 23451078Speter u_char *ihighwater; /* threshold in input buffer */ 23551078Speter u_char *iptr; /* next free spot in input buffer */ 23651078Speter int ibufsize; /* size of ibuf (not include error bytes) */ 23751078Speter int ierroff; /* offset of error bytes in ibuf */ 23851078Speter 23951078Speter struct lbq obufq; /* head of queue of output buffers */ 24051078Speter struct lbq obufs[2]; /* output buffers */ 24151078Speter 24260471Snyan bus_space_tag_t bst; 24360471Snyan bus_space_handle_t bsh; 24460471Snyan 24551078Speter Port_t data_port; /* i/o ports */ 24651078Speter#ifdef COM_ESP 24751078Speter Port_t esp_port; 24851078Speter#endif 24951078Speter Port_t int_id_port; 25051078Speter Port_t modem_ctl_port; 25151078Speter Port_t line_status_port; 25251078Speter Port_t modem_status_port; 25351078Speter Port_t intr_ctl_port; /* Ports of IIR register */ 25451078Speter 25551078Speter struct tty *tp; /* cross reference */ 25651078Speter 25751078Speter /* Initial state. */ 25851078Speter struct termios it_in; /* should be in struct tty */ 25951078Speter struct termios it_out; 26051078Speter 26151078Speter /* Lock state. */ 26251078Speter struct termios lt_in; /* should be in struct tty */ 26351078Speter struct termios lt_out; 26451078Speter 26551078Speter bool_t do_timestamp; 26651078Speter bool_t do_dcd_timestamp; 26751078Speter struct timeval timestamp; 26851078Speter struct timeval dcd_timestamp; 26951078Speter struct pps_state pps; 27051078Speter 27151078Speter u_long bytes_in; /* statistics */ 27251078Speter u_long bytes_out; 27351078Speter u_int delta_error_counts[CE_NTYPES]; 27451078Speter u_long error_counts[CE_NTYPES]; 27551078Speter 27651078Speter struct resource *irqres; 27751078Speter struct resource *ioportres; 27854386Simp void *cookie; 27965131Sphk dev_t devs[6]; 28051078Speter 28151078Speter /* 28251078Speter * Data area for output buffers. Someday we should build the output 28351078Speter * buffer queue without copying data. 28451078Speter */ 28551078Speter u_char obuf1[256]; 28651078Speter u_char obuf2[256]; 28751078Speter}; 28851078Speter 28951078Speter#ifdef COM_ESP 29051078Speterstatic int espattach __P((struct com_s *com, Port_t esp_port)); 29151078Speter#endif 29258885Simpstatic int sioattach __P((device_t dev, int rid)); 29352471Simpstatic int sio_isa_attach __P((device_t dev)); 29451078Speter 29551078Speterstatic timeout_t siobusycheck; 29651078Speterstatic timeout_t siodtrwakeup; 29751078Speterstatic void comhardclose __P((struct com_s *com)); 29851078Speterstatic void sioinput __P((struct com_s *com)); 29951078Speterstatic void siointr1 __P((struct com_s *com)); 30051078Speterstatic void siointr __P((void *arg)); 30151078Speterstatic int commctl __P((struct com_s *com, int bits, int how)); 30251078Speterstatic int comparam __P((struct tty *tp, struct termios *t)); 30367551Sjhbstatic void siopoll __P((void *)); 30458885Simpstatic int sioprobe __P((device_t dev, int xrid)); 30552471Simpstatic int sio_isa_probe __P((device_t dev)); 30651078Speterstatic void siosettimeout __P((void)); 30765605Sjhbstatic int siosetwater __P((struct com_s *com, speed_t speed)); 30851078Speterstatic void comstart __P((struct tty *tp)); 30951654Sphkstatic void comstop __P((struct tty *tp, int rw)); 31051078Speterstatic timeout_t comwakeup; 31151078Speterstatic void disc_optim __P((struct tty *tp, struct termios *t, 31251078Speter struct com_s *com)); 31351078Speter 31452471Simp#if NCARD > 0 31552471Simpstatic int sio_pccard_attach __P((device_t dev)); 31654386Simpstatic int sio_pccard_detach __P((device_t dev)); 31752471Simpstatic int sio_pccard_probe __P((device_t dev)); 31852471Simp#endif /* NCARD > 0 */ 31951078Speter 32058885Simp#if NPCI > 0 32158885Simpstatic int sio_pci_attach __P((device_t dev)); 32258885Simpstatic void sio_pci_kludge_unit __P((device_t dev)); 32358885Simpstatic int sio_pci_probe __P((device_t dev)); 32458885Simp#endif /* NPCI > 0 */ 32558885Simp 32651078Speterstatic char driver_name[] = "sio"; 32751078Speter 32851078Speter/* table and macro for fast conversion from a unit number to its com struct */ 32951078Speterstatic devclass_t sio_devclass; 33051078Speter#define com_addr(unit) ((struct com_s *) \ 33151078Speter devclass_get_softc(sio_devclass, unit)) 33251078Speter 33352471Simpstatic device_method_t sio_isa_methods[] = { 33451078Speter /* Device interface */ 33552471Simp DEVMETHOD(device_probe, sio_isa_probe), 33652471Simp DEVMETHOD(device_attach, sio_isa_attach), 33751078Speter 33851078Speter { 0, 0 } 33951078Speter}; 34051078Speter 34152471Simpstatic driver_t sio_isa_driver = { 34251078Speter driver_name, 34352471Simp sio_isa_methods, 34451078Speter sizeof(struct com_s), 34551078Speter}; 34651078Speter 34752471Simp#if NCARD > 0 34852471Simpstatic device_method_t sio_pccard_methods[] = { 34952471Simp /* Device interface */ 35052471Simp DEVMETHOD(device_probe, sio_pccard_probe), 35152471Simp DEVMETHOD(device_attach, sio_pccard_attach), 35252471Simp DEVMETHOD(device_detach, sio_pccard_detach), 35352471Simp 35452471Simp { 0, 0 } 35552471Simp}; 35652471Simp 35752471Simpstatic driver_t sio_pccard_driver = { 35852471Simp driver_name, 35952471Simp sio_pccard_methods, 36052471Simp sizeof(struct com_s), 36152471Simp}; 36258885Simp#endif /* NCARD > 0 */ 36352471Simp 36458885Simp#if NPCI > 0 36558885Simpstatic device_method_t sio_pci_methods[] = { 36658885Simp /* Device interface */ 36758885Simp DEVMETHOD(device_probe, sio_pci_probe), 36858885Simp DEVMETHOD(device_attach, sio_pci_attach), 36958885Simp 37058885Simp { 0, 0 } 37158885Simp}; 37258885Simp 37358885Simpstatic driver_t sio_pci_driver = { 37458885Simp driver_name, 37558885Simp sio_pci_methods, 37658885Simp sizeof(struct com_s), 37758885Simp}; 37858885Simp#endif /* NPCI > 0 */ 37958885Simp 38051078Speterstatic d_open_t sioopen; 38151078Speterstatic d_close_t sioclose; 38251078Speterstatic d_read_t sioread; 38351078Speterstatic d_write_t siowrite; 38451078Speterstatic d_ioctl_t sioioctl; 38551078Speter 38651078Speter#define CDEV_MAJOR 28 38751078Speterstatic struct cdevsw sio_cdevsw = { 38851078Speter /* open */ sioopen, 38951078Speter /* close */ sioclose, 39051078Speter /* read */ sioread, 39151078Speter /* write */ siowrite, 39251078Speter /* ioctl */ sioioctl, 39351654Sphk /* poll */ ttypoll, 39451078Speter /* mmap */ nommap, 39551078Speter /* strategy */ nostrategy, 39651078Speter /* name */ driver_name, 39751078Speter /* maj */ CDEV_MAJOR, 39851078Speter /* dump */ nodump, 39951078Speter /* psize */ nopsize, 40051078Speter /* flags */ D_TTY, 40151078Speter /* bmaj */ -1 40251078Speter}; 40351078Speter 40451078Speterint comconsole = -1; 40551078Speterstatic volatile speed_t comdefaultrate = CONSPEED; 40651078Speter#ifdef __alpha__ 40751078Speterstatic volatile speed_t gdbdefaultrate = CONSPEED; 40851078Speter#endif 40951078Speterstatic u_int com_events; /* input chars + weighted output completions */ 41051078Speterstatic Port_t siocniobase; 41166230Sjhb#ifndef __alpha__ 41251078Speterstatic int siocnunit; 41366230Sjhb#endif 41451078Speterstatic Port_t siogdbiobase; 41551078Speterstatic int siogdbunit = -1; 41667551Sjhbstatic struct intrhand *sio_slow_ih; 41767551Sjhbstatic struct intrhand *sio_fast_ih; 41851078Speterstatic int sio_timeout; 41951078Speterstatic int sio_timeouts_until_log; 42051078Speterstatic struct callout_handle sio_timeout_handle 42151078Speter = CALLOUT_HANDLE_INITIALIZER(&sio_timeout_handle); 42253344Speterstatic int sio_numunits; 42351078Speter 42451078Speterstatic struct speedtab comspeedtab[] = { 42551078Speter { 0, 0 }, 42651078Speter { 50, COMBRD(50) }, 42751078Speter { 75, COMBRD(75) }, 42851078Speter { 110, COMBRD(110) }, 42951078Speter { 134, COMBRD(134) }, 43051078Speter { 150, COMBRD(150) }, 43151078Speter { 200, COMBRD(200) }, 43251078Speter { 300, COMBRD(300) }, 43351078Speter { 600, COMBRD(600) }, 43451078Speter { 1200, COMBRD(1200) }, 43551078Speter { 1800, COMBRD(1800) }, 43651078Speter { 2400, COMBRD(2400) }, 43751078Speter { 4800, COMBRD(4800) }, 43851078Speter { 9600, COMBRD(9600) }, 43951078Speter { 19200, COMBRD(19200) }, 44051078Speter { 38400, COMBRD(38400) }, 44151078Speter { 57600, COMBRD(57600) }, 44251078Speter { 115200, COMBRD(115200) }, 44351078Speter { -1, -1 } 44451078Speter}; 44551078Speter 44651078Speter#ifdef COM_ESP 44751078Speter/* XXX configure this properly. */ 44851078Speterstatic Port_t likely_com_ports[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, }; 44951078Speterstatic Port_t likely_esp_ports[] = { 0x140, 0x180, 0x280, 0 }; 45051078Speter#endif 45151078Speter 45251078Speter/* 45351078Speter * handle sysctl read/write requests for console speed 45451078Speter * 45551078Speter * In addition to setting comdefaultrate for I/O through /dev/console, 45651078Speter * also set the initial and lock values for the /dev/ttyXX device 45751078Speter * if there is one associated with the console. Finally, if the /dev/tty 45851078Speter * device has already been open, change the speed on the open running port 45951078Speter * itself. 46051078Speter */ 46151078Speter 46251078Speterstatic int 46362573Sphksysctl_machdep_comdefaultrate(SYSCTL_HANDLER_ARGS) 46451078Speter{ 46551078Speter int error, s; 46651078Speter speed_t newspeed; 46751078Speter struct com_s *com; 46851078Speter struct tty *tp; 46951078Speter 47051078Speter newspeed = comdefaultrate; 47151078Speter 47251078Speter error = sysctl_handle_opaque(oidp, &newspeed, sizeof newspeed, req); 47351078Speter if (error || !req->newptr) 47451078Speter return (error); 47551078Speter 47651078Speter comdefaultrate = newspeed; 47751078Speter 47851078Speter if (comconsole < 0) /* serial console not selected? */ 47951078Speter return (0); 48051078Speter 48151078Speter com = com_addr(comconsole); 48257915Simp if (com == NULL) 48351078Speter return (ENXIO); 48451078Speter 48551078Speter /* 48651078Speter * set the initial and lock rates for /dev/ttydXX and /dev/cuaXX 48751078Speter * (note, the lock rates really are boolean -- if non-zero, disallow 48851078Speter * speed changes) 48951078Speter */ 49051078Speter com->it_in.c_ispeed = com->it_in.c_ospeed = 49151078Speter com->lt_in.c_ispeed = com->lt_in.c_ospeed = 49251078Speter com->it_out.c_ispeed = com->it_out.c_ospeed = 49351078Speter com->lt_out.c_ispeed = com->lt_out.c_ospeed = comdefaultrate; 49451078Speter 49551078Speter /* 49651078Speter * if we're open, change the running rate too 49751078Speter */ 49851078Speter tp = com->tp; 49951078Speter if (tp && (tp->t_state & TS_ISOPEN)) { 50051078Speter tp->t_termios.c_ispeed = 50151078Speter tp->t_termios.c_ospeed = comdefaultrate; 50251078Speter s = spltty(); 50351078Speter error = comparam(tp, &tp->t_termios); 50451078Speter splx(s); 50551078Speter } 50651078Speter return error; 50751078Speter} 50851078Speter 50951078SpeterSYSCTL_PROC(_machdep, OID_AUTO, conspeed, CTLTYPE_INT | CTLFLAG_RW, 51051078Speter 0, 0, sysctl_machdep_comdefaultrate, "I", ""); 51151078Speter 51253344Speter#define SET_FLAG(dev, bit) device_set_flags(dev, device_get_flags(dev) | (bit)) 51353344Speter#define CLR_FLAG(dev, bit) device_set_flags(dev, device_get_flags(dev) & ~(bit)) 51453344Speter 51551078Speter#if NCARD > 0 51652471Simpstatic int 51752471Simpsio_pccard_probe(dev) 51852471Simp device_t dev; 51951078Speter{ 52054386Simp /* Do not probe IRQ - pccard doesn't turn on the interrupt line */ 52154386Simp /* until bus_setup_intr */ 52253344Speter SET_FLAG(dev, COM_C_NOPROBE); 52353344Speter 52458885Simp return (sioprobe(dev, 0)); 52552471Simp} 52651078Speter 52752471Simpstatic int 52852471Simpsio_pccard_attach(dev) 52952471Simp device_t dev; 53052471Simp{ 53158885Simp return (sioattach(dev, 0)); 53251078Speter} 53351078Speter 53451078Speter/* 53552471Simp * sio_detach - unload the driver and clear the table. 53651078Speter * XXX TODO: 53751078Speter * This is usually called when the card is ejected, but 53851078Speter * can be caused by a modunload of a controller driver. 53951078Speter * The idea is to reset the driver's view of the device 54051078Speter * and ensure that any driver entry points such as 54151078Speter * read and write do not hang. 54251078Speter */ 54353978Simpstatic int 54452471Simpsio_pccard_detach(dev) 54552471Simp device_t dev; 54651078Speter{ 54751078Speter struct com_s *com; 54865131Sphk int i; 54951078Speter 55052471Simp com = (struct com_s *) device_get_softc(dev); 55157915Simp if (com == NULL) { 55252471Simp device_printf(dev, "NULL com in siounload\n"); 55354386Simp return (0); 55451078Speter } 55554386Simp com->gone = 1; 55665131Sphk for (i = 0 ; i < 6; i++) 55765131Sphk destroy_dev(com->devs[i]); 55854386Simp if (com->irqres) { 55954386Simp bus_teardown_intr(dev, com->irqres, com->cookie); 56054386Simp bus_release_resource(dev, SYS_RES_IRQ, 0, com->irqres); 56154386Simp } 56254386Simp if (com->ioportres) 56354386Simp bus_release_resource(dev, SYS_RES_IOPORT, 0, com->ioportres); 56451078Speter if (com->tp && (com->tp->t_state & TS_ISOPEN)) { 56557915Simp device_printf(dev, "still open, forcing close\n"); 56651078Speter com->tp->t_gen++; 56751078Speter ttyclose(com->tp); 56851078Speter ttwakeup(com->tp); 56951078Speter ttwwakeup(com->tp); 57051078Speter } else { 57151078Speter if (com->ibuf != NULL) 57251078Speter free(com->ibuf, M_DEVBUF); 57351078Speter } 57457915Simp device_printf(dev, "unloaded\n"); 57553978Simp return (0); 57651078Speter} 57751078Speter#endif /* NCARD > 0 */ 57851078Speter 57958885Simp#if NPCI > 0 58058885Simpstruct pci_ids { 58158885Simp u_int32_t type; 58258885Simp const char *desc; 58358885Simp int rid; 58458885Simp}; 58551078Speter 58658885Simpstatic struct pci_ids pci_ids[] = { 58758885Simp { 0x100812b9, "3COM PCI FaxModem", 0x10 }, 58858885Simp { 0x048011c1, "ActionTec 56k FAX PCI Modem", 0x14 }, 58958885Simp { 0x00000000, NULL, 0 } 59058885Simp}; 59158885Simp 59258885Simpstatic int 59358885Simpsio_pci_attach(dev) 59458885Simp device_t dev; 59558885Simp{ 59658885Simp u_int32_t type; 59758885Simp struct pci_ids *id; 59858885Simp 59958885Simp type = pci_get_devid(dev); 60058885Simp id = pci_ids; 60158885Simp while (id->type && id->type != type) 60258885Simp id++; 60358885Simp if (id->desc == NULL) 60458885Simp return (ENXIO); 60558885Simp sio_pci_kludge_unit(dev); 60658885Simp return (sioattach(dev, id->rid)); 60758885Simp} 60858885Simp 60958885Simp/* 61058885Simp * Don't cut and paste this to other drivers. It is a horrible kludge 61158885Simp * which will fail to work and also be unnecessary in future versions. 61258885Simp */ 61358885Simpstatic void 61458885Simpsio_pci_kludge_unit(dev) 61558885Simp device_t dev; 61658885Simp{ 61758885Simp devclass_t dc; 61858885Simp int err; 61958885Simp int start; 62058885Simp int unit; 62158885Simp 62258885Simp unit = 0; 62358885Simp start = 0; 62458885Simp while (resource_int_value("sio", unit, "port", &start) == 0 && 62558885Simp start > 0) 62658885Simp unit++; 62758885Simp if (device_get_unit(dev) < unit) { 62858885Simp dc = device_get_devclass(dev); 62958885Simp while (devclass_get_device(dc, unit)) 63058885Simp unit++; 63158885Simp device_printf(dev, "moving to sio%d\n", unit); 63258885Simp err = device_set_unit(dev, unit); /* EVIL DO NOT COPY */ 63358885Simp if (err) 63458885Simp device_printf(dev, "error moving device %d\n", err); 63558885Simp } 63658885Simp} 63758885Simp 63858885Simpstatic int 63958885Simpsio_pci_probe(dev) 64058885Simp device_t dev; 64158885Simp{ 64258885Simp u_int32_t type; 64358885Simp struct pci_ids *id; 64458885Simp 64558885Simp type = pci_get_devid(dev); 64658885Simp id = pci_ids; 64758885Simp while (id->type && id->type != type) 64858885Simp id++; 64958885Simp if (id->desc == NULL) 65058885Simp return (ENXIO); 65158885Simp device_set_desc(dev, id->desc); 65258885Simp return (sioprobe(dev, id->rid)); 65358885Simp} 65458885Simp#endif /* NPCI > 0 */ 65558885Simp 65651078Speterstatic struct isa_pnp_id sio_ids[] = { 65751078Speter {0x0005d041, "Standard PC COM port"}, /* PNP0500 */ 65851078Speter {0x0105d041, "16550A-compatible COM port"}, /* PNP0501 */ 65951078Speter {0x0205d041, "Multiport serial device (non-intelligent 16550)"}, /* PNP0502 */ 66051078Speter {0x1005d041, "Generic IRDA-compatible device"}, /* PNP0510 */ 66151078Speter {0x1105d041, "Generic IRDA-compatible device"}, /* PNP0511 */ 66254944Speter /* Devices that do not have a compatid */ 66360696Stanimura {0x12206804, NULL}, /* ACH2012 - 5634BTS 56K Video Ready Modem */ 66454944Speter {0x7602a904, NULL}, /* AEI0276 - 56K v.90 Fax Modem (LKT) */ 66554944Speter {0x00007905, NULL}, /* AKY0000 - 56K Plug&Play Modem */ 66654944Speter {0x01405407, NULL}, /* AZT4001 - AZT3000 PnP SOUND DEVICE, MODEM */ 66754944Speter {0x56039008, NULL}, /* BDP0356 - Best Data 56x2 */ 66854944Speter {0x36339008, NULL}, /* BDP3336 - Best Data Prods. 336F */ 66954944Speter {0x0014490a, NULL}, /* BRI1400 - Boca 33.6 PnP */ 67054944Speter {0x0015490a, NULL}, /* BRI1500 - Internal Fax Data */ 67154944Speter {0x0034490a, NULL}, /* BRI3400 - Internal ACF Modem */ 67265438Ssheldonh {0x0094490a, NULL}, /* BRI9400 - Boca K56Flex PnP */ 67354944Speter {0x00b4490a, NULL}, /* BRIB400 - Boca 56k PnP */ 67454944Speter {0x0030320d, NULL}, /* CIR3000 - Cirrus Logic V43 */ 67556229Speter {0x0100440e, NULL}, /* CRD0001 - Cardinal MVP288IV ? */ 67660674Stanimura {0x36033610, NULL}, /* DAV0336 - DAVICOM 336PNP MODEM */ 67759888Stanimura {0x0000aa1a, NULL}, /* FUJ0000 - FUJITSU Modem 33600 PNP/I2 */ 67854944Speter {0x1200c31e, NULL}, /* GVC0012 - VF1128HV-R9 (win modem?) */ 67954944Speter {0x0303c31e, NULL}, /* GVC0303 - MaxTech 33.6 PnP D/F/V */ 68055124Speter {0x0505c31e, NULL}, /* GVC0505 - GVC 56k Faxmodem */ 68154944Speter {0x0050c31e, NULL}, /* GVC5000 - some GVC modem */ 68254944Speter {0x3800f91e, NULL}, /* GWY0038 - Telepath with v.90 */ 68354944Speter {0x9062f91e, NULL}, /* GWY6290 - Telepath with x2 Technology */ 68466920Stanimura {0x21002534, NULL}, /* MAE0021 - Jetstream Int V.90 56k Voice Series 2*/ 68554944Speter {0x0000f435, NULL}, /* MOT0000 - Motorola ModemSURFR 33.6 Intern */ 68654944Speter {0x5015f435, NULL}, /* MOT1550 - Motorola ModemSURFR 56K Modem */ 68754944Speter {0xf015f435, NULL}, /* MOT15F0 - Motorola VoiceSURFR 56K Modem */ 68854944Speter {0x6045f435, NULL}, /* MOT4560 - Motorola ? */ 68954944Speter {0x61e7a338, NULL}, /* NECE761 - 33.6Modem */ 69060674Stanimura {0x0f804f3f, NULL}, /* OZO800f - Zoom 2812 (56k Modem) */ 69154944Speter {0x39804f3f, NULL}, /* OZO8039 - Zoom 56k flex */ 69257769Speter {0x3024a341, NULL}, /* PMC2430 - Pace 56 Voice Internal Modem */ 69354944Speter {0x1000eb49, NULL}, /* ROK0010 - Rockwell ? */ 69454944Speter {0x5002734a, NULL}, /* RSS0250 - 5614Jx3(G) Internal Modem */ 69560708Stanimura {0x6202734a, NULL}, /* RSS0262 - 5614Jx3[G] V90+K56Flex Modem */ 69654944Speter {0xc100ad4d, NULL}, /* SMM00C1 - Leopard 56k PnP */ 69756229Speter {0x9012b04e, NULL}, /* SUP1290 - Supra ? */ 69854944Speter {0x1013b04e, NULL}, /* SUP1310 - SupraExpress 336i PnP */ 69954944Speter {0x8013b04e, NULL}, /* SUP1380 - SupraExpress 288i PnP Voice */ 70054944Speter {0x8113b04e, NULL}, /* SUP1381 - SupraExpress 336i PnP Voice */ 70154944Speter {0x5016b04e, NULL}, /* SUP1650 - Supra 336i Sp Intl */ 70260947Stanimura {0x7016b04e, NULL}, /* SUP1670 - Supra 336i V+ Intl */ 70354944Speter {0x7420b04e, NULL}, /* SUP2070 - Supra ? */ 70454944Speter {0x8020b04e, NULL}, /* SUP2080 - Supra ? */ 70554944Speter {0x8420b04e, NULL}, /* SUP2084 - SupraExpress 56i PnP */ 70656229Speter {0x7121b04e, NULL}, /* SUP2171 - SupraExpress 56i Sp? */ 70754944Speter {0x8024b04e, NULL}, /* SUP2480 - Supra ? */ 70854944Speter {0x01007256, NULL}, /* USR0001 - U.S. Robotics Inc., Sportster W */ 70954944Speter {0x02007256, NULL}, /* USR0002 - U.S. Robotics Inc. Sportster 33. */ 71054944Speter {0x04007256, NULL}, /* USR0004 - USR Sportster 14.4k */ 71154944Speter {0x06007256, NULL}, /* USR0006 - USR Sportster 33.6k */ 71256229Speter {0x11007256, NULL}, /* USR0011 - USR ? */ 71354944Speter {0x01017256, NULL}, /* USR0101 - USR ? */ 71454944Speter {0x30207256, NULL}, /* USR2030 - U.S.Robotics Inc. Sportster 560 */ 71554944Speter {0x50207256, NULL}, /* USR2050 - U.S.Robotics Inc. Sportster 33. */ 71654944Speter {0x70207256, NULL}, /* USR2070 - U.S.Robotics Inc. Sportster 560 */ 71754944Speter {0x30307256, NULL}, /* USR3030 - U.S. Robotics 56K FAX INT */ 71854944Speter {0x31307256, NULL}, /* USR3031 - U.S. Robotics 56K FAX INT */ 71958848Speter {0x50307256, NULL}, /* USR3050 - U.S. Robotics 56K FAX INT */ 72054944Speter {0x70307256, NULL}, /* USR3070 - U.S. Robotics 56K Voice INT */ 72156229Speter {0x90307256, NULL}, /* USR3090 - USR ? */ 72264688Speter {0x70917256, NULL}, /* USR9170 - U.S. Robotics 56K FAX INT */ 72354944Speter {0x90917256, NULL}, /* USR9190 - USR 56k Voice INT */ 72454944Speter {0x0300695c, NULL}, /* WCI0003 - Fax/Voice/Modem/Speakphone/Asvd */ 72565469Ssheldonh {0x01a0896a, NULL}, /* ZTIA001 - Zoom Internal V90 Faxmodem */ 72654944Speter {0x61f7896a, NULL}, /* ZTIF761 - Zoom ComStar 33.6 */ 72751078Speter {0} 72851078Speter}; 72951078Speter 73056229Speter 73156229Speter 73251078Speterstatic int 73352471Simpsio_isa_probe(dev) 73452471Simp device_t dev; 73552471Simp{ 73652471Simp /* Check isapnp ids */ 73752471Simp if (ISA_PNP_PROBE(device_get_parent(dev), dev, sio_ids) == ENXIO) 73852471Simp return (ENXIO); 73958885Simp return (sioprobe(dev, 0)); 74052471Simp} 74152471Simp 74252471Simpstatic int 74358885Simpsioprobe(dev, xrid) 74451078Speter device_t dev; 74558885Simp int xrid; 74651078Speter{ 74753344Speter#if 0 74851078Speter static bool_t already_init; 74953344Speter device_t xdev; 75053344Speter#endif 75160471Snyan struct com_s *com; 75251078Speter bool_t failures[10]; 75351078Speter int fn; 75451078Speter device_t idev; 75551078Speter Port_t iobase; 75651078Speter intrmask_t irqmap[4]; 75751078Speter intrmask_t irqs; 75851078Speter u_char mcr_image; 75951078Speter int result; 76054206Speter u_long xirq; 76151088Speter u_int flags = device_get_flags(dev); 76251078Speter int rid; 76351078Speter struct resource *port; 76465557Sjasone int intrsave; 76551078Speter 76658885Simp rid = xrid; 76751078Speter port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 76851078Speter 0, ~0, IO_COMSIZE, RF_ACTIVE); 76951078Speter if (!port) 77057915Simp return (ENXIO); 77151078Speter 77260471Snyan com = device_get_softc(dev); 77360471Snyan com->bst = rman_get_bustag(port); 77460471Snyan com->bsh = rman_get_bushandle(port); 77560471Snyan 77653344Speter#if 0 77753344Speter /* 77853344Speter * XXX this is broken - when we are first called, there are no 77953344Speter * previously configured IO ports. We could hard code 78053344Speter * 0x3f8, 0x2f8, 0x3e8, 0x2e8 etc but that's probably worse. 78153344Speter * This code has been doing nothing since the conversion since 78253344Speter * "count" is zero the first time around. 78353344Speter */ 78451078Speter if (!already_init) { 78551078Speter /* 78651078Speter * Turn off MCR_IENABLE for all likely serial ports. An unused 78751078Speter * port with its MCR_IENABLE gate open will inhibit interrupts 78851078Speter * from any used port that shares the interrupt vector. 78951078Speter * XXX the gate enable is elsewhere for some multiports. 79051078Speter */ 79151078Speter device_t *devs; 79253344Speter int count, i, xioport; 79351078Speter 79451078Speter devclass_get_devices(sio_devclass, &devs, &count); 79551078Speter for (i = 0; i < count; i++) { 79651078Speter xdev = devs[i]; 79754194Speter if (device_is_enabled(xdev) && 79854194Speter bus_get_resource(xdev, SYS_RES_IOPORT, 0, &xioport, 79954194Speter NULL) == 0) 80053344Speter outb(xioport + com_mcr, 0); 80151078Speter } 80251078Speter free(devs, M_TEMP); 80351078Speter already_init = TRUE; 80451078Speter } 80553344Speter#endif 80651078Speter 80751078Speter if (COM_LLCONSOLE(flags)) { 80851078Speter printf("sio%d: reserved for low-level i/o\n", 80951078Speter device_get_unit(dev)); 81056788Sbde bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 81151078Speter return (ENXIO); 81251078Speter } 81351078Speter 81451078Speter /* 81551078Speter * If the device is on a multiport card and has an AST/4 81651078Speter * compatible interrupt control register, initialize this 81751078Speter * register and prepare to leave MCR_IENABLE clear in the mcr. 81851078Speter * Otherwise, prepare to set MCR_IENABLE in the mcr. 81951078Speter * Point idev to the device struct giving the correct id_irq. 82051078Speter * This is the struct for the master device if there is one. 82151078Speter */ 82251078Speter idev = dev; 82351078Speter mcr_image = MCR_IENABLE; 82451078Speter#ifdef COM_MULTIPORT 82557234Sbde if (COM_ISMULTIPORT(flags)) { 82654206Speter Port_t xiobase; 82754206Speter u_long io; 82854206Speter 82951078Speter idev = devclass_get_device(sio_devclass, COM_MPMASTER(flags)); 83051078Speter if (idev == NULL) { 83151078Speter printf("sio%d: master device %d not configured\n", 83251078Speter device_get_unit(dev), COM_MPMASTER(flags)); 83351078Speter idev = dev; 83451078Speter } 83557234Sbde if (!COM_NOTAST4(flags)) { 83657234Sbde if (bus_get_resource(idev, SYS_RES_IOPORT, 0, &io, 83757234Sbde NULL) == 0) { 83857234Sbde xiobase = io; 83957234Sbde if (bus_get_resource(idev, SYS_RES_IRQ, 0, 84057234Sbde NULL, NULL) == 0) 84157234Sbde outb(xiobase + com_scr, 0x80); 84257234Sbde else 84357234Sbde outb(xiobase + com_scr, 0); 84457234Sbde } 84557234Sbde mcr_image = 0; 84651078Speter } 84751078Speter } 84851078Speter#endif /* COM_MULTIPORT */ 84954194Speter if (bus_get_resource(idev, SYS_RES_IRQ, 0, NULL, NULL) != 0) 85051078Speter mcr_image = 0; 85151078Speter 85251078Speter bzero(failures, sizeof failures); 85351078Speter iobase = rman_get_start(port); 85451078Speter 85551078Speter /* 85651078Speter * We don't want to get actual interrupts, just masked ones. 85751078Speter * Interrupts from this line should already be masked in the ICU, 85851078Speter * but mask them in the processor as well in case there are some 85951078Speter * (misconfigured) shared interrupts. 86051078Speter */ 86165557Sjasone intrsave = save_intr(); 86251078Speter disable_intr(); 86365557Sjasone COM_LOCK(); 86451078Speter/* EXTRA DELAY? */ 86551078Speter 86651078Speter /* 86751078Speter * Initialize the speed and the word size and wait long enough to 86851078Speter * drain the maximum of 16 bytes of junk in device output queues. 86951078Speter * The speed is undefined after a master reset and must be set 87051078Speter * before relying on anything related to output. There may be 87151078Speter * junk after a (very fast) soft reboot and (apparently) after 87251078Speter * master reset. 87351078Speter * XXX what about the UART bug avoided by waiting in comparam()? 87451078Speter * We don't want to to wait long enough to drain at 2 bps. 87551078Speter */ 87651078Speter if (iobase == siocniobase) 87751078Speter DELAY((16 + 1) * 1000000 / (comdefaultrate / 10)); 87851078Speter else { 87960471Snyan sio_setreg(com, com_cfcr, CFCR_DLAB | CFCR_8BITS); 88060471Snyan sio_setreg(com, com_dlbl, COMBRD(SIO_TEST_SPEED) & 0xff); 88160471Snyan sio_setreg(com, com_dlbh, (u_int) COMBRD(SIO_TEST_SPEED) >> 8); 88260471Snyan sio_setreg(com, com_cfcr, CFCR_8BITS); 88351078Speter DELAY((16 + 1) * 1000000 / (SIO_TEST_SPEED / 10)); 88451078Speter } 88551078Speter 88651078Speter /* 88751078Speter * Enable the interrupt gate and disable device interupts. This 88851078Speter * should leave the device driving the interrupt line low and 88951078Speter * guarantee an edge trigger if an interrupt can be generated. 89051078Speter */ 89151078Speter/* EXTRA DELAY? */ 89260471Snyan sio_setreg(com, com_mcr, mcr_image); 89360471Snyan sio_setreg(com, com_ier, 0); 89451078Speter DELAY(1000); /* XXX */ 89551078Speter irqmap[0] = isa_irq_pending(); 89651078Speter 89751078Speter /* 89851078Speter * Attempt to set loopback mode so that we can send a null byte 89951078Speter * without annoying any external device. 90051078Speter */ 90151078Speter/* EXTRA DELAY? */ 90260471Snyan sio_setreg(com, com_mcr, mcr_image | MCR_LOOPBACK); 90351078Speter 90451078Speter /* 90551078Speter * Attempt to generate an output interrupt. On 8250's, setting 90651078Speter * IER_ETXRDY generates an interrupt independent of the current 90751078Speter * setting and independent of whether the THR is empty. On 16450's, 90851078Speter * setting IER_ETXRDY generates an interrupt independent of the 90951078Speter * current setting. On 16550A's, setting IER_ETXRDY only 91051078Speter * generates an interrupt when IER_ETXRDY is not already set. 91151078Speter */ 91260471Snyan sio_setreg(com, com_ier, IER_ETXRDY); 91351078Speter 91451078Speter /* 91551078Speter * On some 16x50 incompatibles, setting IER_ETXRDY doesn't generate 91651078Speter * an interrupt. They'd better generate one for actually doing 91751078Speter * output. Loopback may be broken on the same incompatibles but 91851078Speter * it's unlikely to do more than allow the null byte out. 91951078Speter */ 92060471Snyan sio_setreg(com, com_data, 0); 92151078Speter DELAY((1 + 2) * 1000000 / (SIO_TEST_SPEED / 10)); 92251078Speter 92351078Speter /* 92451078Speter * Turn off loopback mode so that the interrupt gate works again 92551078Speter * (MCR_IENABLE was hidden). This should leave the device driving 92651078Speter * an interrupt line high. It doesn't matter if the interrupt 92751078Speter * line oscillates while we are not looking at it, since interrupts 92851078Speter * are disabled. 92951078Speter */ 93051078Speter/* EXTRA DELAY? */ 93160471Snyan sio_setreg(com, com_mcr, mcr_image); 93251078Speter 93351078Speter /* 93452471Simp * Some pcmcia cards have the "TXRDY bug", so we check everyone 93551078Speter * for IIR_TXRDY implementation ( Palido 321s, DC-1S... ) 93651078Speter */ 93753370Speter if (COM_NOPROBE(flags)) { 93853370Speter /* Reading IIR register twice */ 93953370Speter for (fn = 0; fn < 2; fn ++) { 94053370Speter DELAY(10000); 94160471Snyan failures[6] = sio_getreg(com, com_iir); 94253370Speter } 94353370Speter /* Check IIR_TXRDY clear ? */ 94453370Speter result = 0; 94553370Speter if (failures[6] & IIR_TXRDY) { 94653370Speter /* Nop, Double check with clearing IER */ 94760471Snyan sio_setreg(com, com_ier, 0); 94860471Snyan if (sio_getreg(com, com_iir) & IIR_NOPEND) { 94953370Speter /* Ok. we're familia this gang */ 95053370Speter SET_FLAG(dev, COM_C_IIR_TXRDYBUG); 95153370Speter } else { 95253370Speter /* Unknown, Just omit this chip.. XXX */ 95353370Speter result = ENXIO; 95453370Speter } 95551078Speter } else { 95653370Speter /* OK. this is well-known guys */ 95753370Speter CLR_FLAG(dev, COM_C_IIR_TXRDYBUG); 95851078Speter } 95960471Snyan sio_setreg(com, com_cfcr, CFCR_8BITS); 96065557Sjasone COM_UNLOCK(); 96165557Sjasone restore_intr(intrsave); 96253344Speter bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 96353344Speter return (iobase == siocniobase ? 0 : result); 96453344Speter } 96553344Speter 96651078Speter /* 96751078Speter * Check that 96851078Speter * o the CFCR, IER and MCR in UART hold the values written to them 96951078Speter * (the values happen to be all distinct - this is good for 97051078Speter * avoiding false positive tests from bus echoes). 97151078Speter * o an output interrupt is generated and its vector is correct. 97251078Speter * o the interrupt goes away when the IIR in the UART is read. 97351078Speter */ 97451078Speter/* EXTRA DELAY? */ 97560471Snyan failures[0] = sio_getreg(com, com_cfcr) - CFCR_8BITS; 97660471Snyan failures[1] = sio_getreg(com, com_ier) - IER_ETXRDY; 97760471Snyan failures[2] = sio_getreg(com, com_mcr) - mcr_image; 97851078Speter DELAY(10000); /* Some internal modems need this time */ 97951078Speter irqmap[1] = isa_irq_pending(); 98060471Snyan failures[4] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_TXRDY; 98151078Speter DELAY(1000); /* XXX */ 98251078Speter irqmap[2] = isa_irq_pending(); 98360471Snyan failures[6] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 98451078Speter 98551078Speter /* 98651078Speter * Turn off all device interrupts and check that they go off properly. 98751078Speter * Leave MCR_IENABLE alone. For ports without a master port, it gates 98851078Speter * the OUT2 output of the UART to 98951078Speter * the ICU input. Closing the gate would give a floating ICU input 99051078Speter * (unless there is another device driving it) and spurious interrupts. 99151078Speter * (On the system that this was first tested on, the input floats high 99251078Speter * and gives a (masked) interrupt as soon as the gate is closed.) 99351078Speter */ 99460471Snyan sio_setreg(com, com_ier, 0); 99560471Snyan sio_setreg(com, com_cfcr, CFCR_8BITS); /* dummy to avoid bus echo */ 99660471Snyan failures[7] = sio_getreg(com, com_ier); 99751078Speter DELAY(1000); /* XXX */ 99851078Speter irqmap[3] = isa_irq_pending(); 99960471Snyan failures[9] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 100051078Speter 100165557Sjasone COM_UNLOCK(); 100265557Sjasone restore_intr(intrsave); 100351078Speter 100451078Speter irqs = irqmap[1] & ~irqmap[0]; 100554194Speter if (bus_get_resource(idev, SYS_RES_IRQ, 0, &xirq, NULL) == 0 && 100654194Speter ((1 << xirq) & irqs) == 0) 100751078Speter printf( 100854206Speter "sio%d: configured irq %ld not in bitmap of probed irqs %#x\n", 100953344Speter device_get_unit(dev), xirq, irqs); 101051078Speter if (bootverbose) 101151078Speter printf("sio%d: irq maps: %#x %#x %#x %#x\n", 101251078Speter device_get_unit(dev), 101351078Speter irqmap[0], irqmap[1], irqmap[2], irqmap[3]); 101451078Speter 101551078Speter result = 0; 101651078Speter for (fn = 0; fn < sizeof failures; ++fn) 101751078Speter if (failures[fn]) { 101860471Snyan sio_setreg(com, com_mcr, 0); 101951078Speter result = ENXIO; 102051078Speter if (bootverbose) { 102151078Speter printf("sio%d: probe failed test(s):", 102251078Speter device_get_unit(dev)); 102351078Speter for (fn = 0; fn < sizeof failures; ++fn) 102451078Speter if (failures[fn]) 102551078Speter printf(" %d", fn); 102651078Speter printf("\n"); 102751078Speter } 102851078Speter break; 102951078Speter } 103051078Speter bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 103151078Speter return (iobase == siocniobase ? 0 : result); 103251078Speter} 103351078Speter 103451078Speter#ifdef COM_ESP 103551078Speterstatic int 103651078Speterespattach(com, esp_port) 103751078Speter struct com_s *com; 103851078Speter Port_t esp_port; 103951078Speter{ 104051078Speter u_char dips; 104151078Speter u_char val; 104251078Speter 104351078Speter /* 104451078Speter * Check the ESP-specific I/O port to see if we're an ESP 104551078Speter * card. If not, return failure immediately. 104651078Speter */ 104751078Speter if ((inb(esp_port) & 0xf3) == 0) { 104851078Speter printf(" port 0x%x is not an ESP board?\n", esp_port); 104951078Speter return (0); 105051078Speter } 105151078Speter 105251078Speter /* 105351078Speter * We've got something that claims to be a Hayes ESP card. 105451078Speter * Let's hope so. 105551078Speter */ 105651078Speter 105751078Speter /* Get the dip-switch configuration */ 105851078Speter outb(esp_port + ESP_CMD1, ESP_GETDIPS); 105951078Speter dips = inb(esp_port + ESP_STATUS1); 106051078Speter 106151078Speter /* 106251078Speter * Bits 0,1 of dips say which COM port we are. 106351078Speter */ 106460471Snyan if (rman_get_start(com->ioportres) == likely_com_ports[dips & 0x03]) 106551078Speter printf(" : ESP"); 106651078Speter else { 106751078Speter printf(" esp_port has com %d\n", dips & 0x03); 106851078Speter return (0); 106951078Speter } 107051078Speter 107151078Speter /* 107251078Speter * Check for ESP version 2.0 or later: bits 4,5,6 = 010. 107351078Speter */ 107451078Speter outb(esp_port + ESP_CMD1, ESP_GETTEST); 107551078Speter val = inb(esp_port + ESP_STATUS1); /* clear reg 1 */ 107651078Speter val = inb(esp_port + ESP_STATUS2); 107751078Speter if ((val & 0x70) < 0x20) { 107851078Speter printf("-old (%o)", val & 0x70); 107951078Speter return (0); 108051078Speter } 108151078Speter 108251078Speter /* 108351078Speter * Check for ability to emulate 16550: bit 7 == 1 108451078Speter */ 108551078Speter if ((dips & 0x80) == 0) { 108651078Speter printf(" slave"); 108751078Speter return (0); 108851078Speter } 108951078Speter 109051078Speter /* 109151078Speter * Okay, we seem to be a Hayes ESP card. Whee. 109251078Speter */ 109351078Speter com->esp = TRUE; 109451078Speter com->esp_port = esp_port; 109551078Speter return (1); 109651078Speter} 109751078Speter#endif /* COM_ESP */ 109851078Speter 109951078Speterstatic int 110052471Simpsio_isa_attach(dev) 110152471Simp device_t dev; 110252471Simp{ 110358885Simp return (sioattach(dev, 0)); 110452471Simp} 110552471Simp 110652471Simpstatic int 110758885Simpsioattach(dev, xrid) 110851078Speter device_t dev; 110958885Simp int xrid; 111051078Speter{ 111151078Speter struct com_s *com; 111251078Speter#ifdef COM_ESP 111351078Speter Port_t *espp; 111451078Speter#endif 111551078Speter Port_t iobase; 111651078Speter int unit; 111753344Speter u_int flags; 111851078Speter int rid; 111951078Speter struct resource *port; 112053344Speter int ret; 112165605Sjhb int intrstate; 112251078Speter 112358885Simp rid = xrid; 112451078Speter port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 112551078Speter 0, ~0, IO_COMSIZE, RF_ACTIVE); 112651078Speter if (!port) 112757915Simp return (ENXIO); 112851078Speter 112951078Speter iobase = rman_get_start(port); 113051078Speter unit = device_get_unit(dev); 113151078Speter com = device_get_softc(dev); 113253344Speter flags = device_get_flags(dev); 113351078Speter 113453344Speter if (unit >= sio_numunits) 113553344Speter sio_numunits = unit + 1; 113651078Speter /* 113751078Speter * sioprobe() has initialized the device registers as follows: 113851078Speter * o cfcr = CFCR_8BITS. 113951078Speter * It is most important that CFCR_DLAB is off, so that the 114051078Speter * data port is not hidden when we enable interrupts. 114151078Speter * o ier = 0. 114251078Speter * Interrupts are only enabled when the line is open. 114351078Speter * o mcr = MCR_IENABLE, or 0 if the port has AST/4 compatible 114451078Speter * interrupt control register or the config specifies no irq. 114551078Speter * Keeping MCR_DTR and MCR_RTS off might stop the external 114651078Speter * device from sending before we are ready. 114751078Speter */ 114851078Speter bzero(com, sizeof *com); 114951078Speter com->unit = unit; 115051078Speter com->ioportres = port; 115160471Snyan com->bst = rman_get_bustag(port); 115260471Snyan com->bsh = rman_get_bushandle(port); 115351078Speter com->cfcr_image = CFCR_8BITS; 115451078Speter com->dtr_wait = 3 * hz; 115551078Speter com->loses_outints = COM_LOSESOUTINTS(flags) != 0; 115657234Sbde com->no_irq = bus_get_resource(dev, SYS_RES_IRQ, 0, NULL, NULL) != 0; 115751078Speter com->tx_fifo_size = 1; 115851078Speter com->obufs[0].l_head = com->obuf1; 115951078Speter com->obufs[1].l_head = com->obuf2; 116051078Speter 116151078Speter com->data_port = iobase + com_data; 116251078Speter com->int_id_port = iobase + com_iir; 116351078Speter com->modem_ctl_port = iobase + com_mcr; 116451078Speter com->mcr_image = inb(com->modem_ctl_port); 116551078Speter com->line_status_port = iobase + com_lsr; 116651078Speter com->modem_status_port = iobase + com_msr; 116751078Speter com->intr_ctl_port = iobase + com_ier; 116851078Speter 116951078Speter /* 117051078Speter * We don't use all the flags from <sys/ttydefaults.h> since they 117151078Speter * are only relevant for logins. It's important to have echo off 117251078Speter * initially so that the line doesn't start blathering before the 117351078Speter * echo flag can be turned off. 117451078Speter */ 117551078Speter com->it_in.c_iflag = 0; 117651078Speter com->it_in.c_oflag = 0; 117751078Speter com->it_in.c_cflag = TTYDEF_CFLAG; 117851078Speter com->it_in.c_lflag = 0; 117951078Speter if (unit == comconsole) { 118051078Speter com->it_in.c_iflag = TTYDEF_IFLAG; 118151078Speter com->it_in.c_oflag = TTYDEF_OFLAG; 118251078Speter com->it_in.c_cflag = TTYDEF_CFLAG | CLOCAL; 118351078Speter com->it_in.c_lflag = TTYDEF_LFLAG; 118451078Speter com->lt_out.c_cflag = com->lt_in.c_cflag = CLOCAL; 118551078Speter com->lt_out.c_ispeed = com->lt_out.c_ospeed = 118651078Speter com->lt_in.c_ispeed = com->lt_in.c_ospeed = 118751078Speter com->it_in.c_ispeed = com->it_in.c_ospeed = comdefaultrate; 118851078Speter } else 118951078Speter com->it_in.c_ispeed = com->it_in.c_ospeed = TTYDEF_SPEED; 119065605Sjhb intrstate = save_intr(); 119165605Sjhb if (siosetwater(com, com->it_in.c_ispeed) != 0) { 119265605Sjhb COM_UNLOCK(); 119365605Sjhb restore_intr(intrstate); 119456788Sbde /* 119556788Sbde * Leave i/o resources allocated if this is a `cn'-level 119656788Sbde * console, so that other devices can't snarf them. 119756788Sbde */ 119856788Sbde if (iobase != siocniobase) 119956788Sbde bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 120056788Sbde return (ENOMEM); 120151078Speter } 120265605Sjhb COM_UNLOCK(); 120365605Sjhb restore_intr(intrstate); 120451078Speter termioschars(&com->it_in); 120551078Speter com->it_out = com->it_in; 120651078Speter 120751078Speter /* attempt to determine UART type */ 120851078Speter printf("sio%d: type", unit); 120951078Speter 121051078Speter 121151078Speter#ifdef COM_MULTIPORT 121251078Speter if (!COM_ISMULTIPORT(flags) && !COM_IIR_TXRDYBUG(flags)) 121351078Speter#else 121451078Speter if (!COM_IIR_TXRDYBUG(flags)) 121551078Speter#endif 121651078Speter { 121751078Speter u_char scr; 121851078Speter u_char scr1; 121951078Speter u_char scr2; 122051078Speter 122160471Snyan scr = sio_getreg(com, com_scr); 122260471Snyan sio_setreg(com, com_scr, 0xa5); 122360471Snyan scr1 = sio_getreg(com, com_scr); 122460471Snyan sio_setreg(com, com_scr, 0x5a); 122560471Snyan scr2 = sio_getreg(com, com_scr); 122660471Snyan sio_setreg(com, com_scr, scr); 122751078Speter if (scr1 != 0xa5 || scr2 != 0x5a) { 122851078Speter printf(" 8250"); 122951078Speter goto determined_type; 123051078Speter } 123151078Speter } 123260471Snyan sio_setreg(com, com_fifo, FIFO_ENABLE | FIFO_RX_HIGH); 123351078Speter DELAY(100); 123451078Speter com->st16650a = 0; 123551078Speter switch (inb(com->int_id_port) & IIR_FIFO_MASK) { 123651078Speter case FIFO_RX_LOW: 123751078Speter printf(" 16450"); 123851078Speter break; 123951078Speter case FIFO_RX_MEDL: 124051078Speter printf(" 16450?"); 124151078Speter break; 124251078Speter case FIFO_RX_MEDH: 124351078Speter printf(" 16550?"); 124451078Speter break; 124551078Speter case FIFO_RX_HIGH: 124651078Speter if (COM_NOFIFO(flags)) { 124751078Speter printf(" 16550A fifo disabled"); 124851078Speter } else { 124951078Speter com->hasfifo = TRUE; 125051078Speter if (COM_ST16650A(flags)) { 125151078Speter com->st16650a = 1; 125251078Speter com->tx_fifo_size = 32; 125351078Speter printf(" ST16650A"); 125451078Speter } else { 125551078Speter com->tx_fifo_size = COM_FIFOSIZE(flags); 125651078Speter printf(" 16550A"); 125751078Speter } 125851078Speter } 125951078Speter#ifdef COM_ESP 126051078Speter for (espp = likely_esp_ports; *espp != 0; espp++) 126151078Speter if (espattach(com, *espp)) { 126251078Speter com->tx_fifo_size = 1024; 126351078Speter break; 126451078Speter } 126551078Speter#endif 126651078Speter if (!com->st16650a) { 126751078Speter if (!com->tx_fifo_size) 126851078Speter com->tx_fifo_size = 16; 126951078Speter else 127051078Speter printf(" lookalike with %d bytes FIFO", 127151078Speter com->tx_fifo_size); 127251078Speter } 127351078Speter 127451078Speter break; 127551078Speter } 127651078Speter 127751078Speter#ifdef COM_ESP 127851078Speter if (com->esp) { 127951078Speter /* 128051078Speter * Set 16550 compatibility mode. 128151078Speter * We don't use the ESP_MODE_SCALE bit to increase the 128251078Speter * fifo trigger levels because we can't handle large 128351078Speter * bursts of input. 128451078Speter * XXX flow control should be set in comparam(), not here. 128551078Speter */ 128651078Speter outb(com->esp_port + ESP_CMD1, ESP_SETMODE); 128751078Speter outb(com->esp_port + ESP_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO); 128851078Speter 128951078Speter /* Set RTS/CTS flow control. */ 129051078Speter outb(com->esp_port + ESP_CMD1, ESP_SETFLOWTYPE); 129151078Speter outb(com->esp_port + ESP_CMD2, ESP_FLOW_RTS); 129251078Speter outb(com->esp_port + ESP_CMD2, ESP_FLOW_CTS); 129351078Speter 129451078Speter /* Set flow-control levels. */ 129551078Speter outb(com->esp_port + ESP_CMD1, ESP_SETRXFLOW); 129651078Speter outb(com->esp_port + ESP_CMD2, HIBYTE(768)); 129751078Speter outb(com->esp_port + ESP_CMD2, LOBYTE(768)); 129851078Speter outb(com->esp_port + ESP_CMD2, HIBYTE(512)); 129951078Speter outb(com->esp_port + ESP_CMD2, LOBYTE(512)); 130051078Speter } 130151078Speter#endif /* COM_ESP */ 130260471Snyan sio_setreg(com, com_fifo, 0); 130351078Speterdetermined_type: ; 130451078Speter 130551078Speter#ifdef COM_MULTIPORT 130651078Speter if (COM_ISMULTIPORT(flags)) { 130753344Speter device_t masterdev; 130853344Speter 130951078Speter com->multiport = TRUE; 131051078Speter printf(" (multiport"); 131151078Speter if (unit == COM_MPMASTER(flags)) 131251078Speter printf(" master"); 131351078Speter printf(")"); 131453344Speter masterdev = devclass_get_device(sio_devclass, 131553344Speter COM_MPMASTER(flags)); 131657234Sbde com->no_irq = (masterdev == NULL || bus_get_resource(masterdev, 131757234Sbde SYS_RES_IRQ, 0, NULL, NULL) != 0); 131851078Speter } 131951078Speter#endif /* COM_MULTIPORT */ 132051078Speter if (unit == comconsole) 132151078Speter printf(", console"); 132253344Speter if (COM_IIR_TXRDYBUG(flags)) 132351078Speter printf(" with a bogus IIR_TXRDY register"); 132451078Speter printf("\n"); 132551078Speter 132667551Sjhb if (sio_fast_ih == NULL) { 132767551Sjhb sio_fast_ih = sinthand_add("tty:sio", &tty_ithd, siopoll, 132867551Sjhb NULL, SWI_TTY, 0); 132967551Sjhb sio_slow_ih = sinthand_add("tty:sio", &clk_ithd, siopoll, 133067551Sjhb NULL, SWI_TTY, 0); 133151078Speter } 133265131Sphk com->devs[0] = make_dev(&sio_cdevsw, unit, 133351078Speter UID_ROOT, GID_WHEEL, 0600, "ttyd%r", unit); 133465131Sphk com->devs[1] = make_dev(&sio_cdevsw, unit | CONTROL_INIT_STATE, 133551078Speter UID_ROOT, GID_WHEEL, 0600, "ttyid%r", unit); 133665131Sphk com->devs[2] = make_dev(&sio_cdevsw, unit | CONTROL_LOCK_STATE, 133751078Speter UID_ROOT, GID_WHEEL, 0600, "ttyld%r", unit); 133865131Sphk com->devs[3] = make_dev(&sio_cdevsw, unit | CALLOUT_MASK, 133951078Speter UID_UUCP, GID_DIALER, 0660, "cuaa%r", unit); 134065131Sphk com->devs[4] = make_dev(&sio_cdevsw, 134165131Sphk unit | CALLOUT_MASK | CONTROL_INIT_STATE, 134251078Speter UID_UUCP, GID_DIALER, 0660, "cuaia%r", unit); 134365131Sphk com->devs[5] = make_dev(&sio_cdevsw, 134465131Sphk unit | CALLOUT_MASK | CONTROL_LOCK_STATE, 134551078Speter UID_UUCP, GID_DIALER, 0660, "cuala%r", unit); 134651078Speter com->flags = flags; 134751078Speter com->pps.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR; 134851078Speter pps_init(&com->pps); 134951078Speter 135051078Speter rid = 0; 135151078Speter com->irqres = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0ul, ~0ul, 1, 135253344Speter RF_ACTIVE); 135353344Speter if (com->irqres) { 135453344Speter ret = BUS_SETUP_INTR(device_get_parent(dev), dev, com->irqres, 135565557Sjasone INTR_TYPE_TTY | INTR_FAST, 135654386Simp siointr, com, &com->cookie); 135754194Speter if (ret) { 135854194Speter ret = BUS_SETUP_INTR(device_get_parent(dev), dev, 135954194Speter com->irqres, INTR_TYPE_TTY, 136054386Simp siointr, com, &com->cookie); 136154194Speter if (ret == 0) 136254194Speter device_printf(dev, "unable to activate interrupt in fast mode - using normal mode"); 136354194Speter } 136453344Speter if (ret) 136553344Speter device_printf(dev, "could not activate interrupt\n"); 136653344Speter } 136751078Speter 136851078Speter return (0); 136951078Speter} 137051078Speter 137151078Speterstatic int 137251078Spetersioopen(dev, flag, mode, p) 137351078Speter dev_t dev; 137451078Speter int flag; 137551078Speter int mode; 137651078Speter struct proc *p; 137751078Speter{ 137851078Speter struct com_s *com; 137951078Speter int error; 138051078Speter int mynor; 138151078Speter int s; 138251078Speter struct tty *tp; 138351078Speter int unit; 138451078Speter 138551078Speter mynor = minor(dev); 138651078Speter unit = MINOR_TO_UNIT(mynor); 138753344Speter com = com_addr(unit); 138853344Speter if (com == NULL) 138951078Speter return (ENXIO); 139051078Speter if (com->gone) 139151078Speter return (ENXIO); 139251078Speter if (mynor & CONTROL_MASK) 139351078Speter return (0); 139451078Speter tp = dev->si_tty = com->tp = ttymalloc(com->tp); 139551078Speter s = spltty(); 139651078Speter /* 139751078Speter * We jump to this label after all non-interrupted sleeps to pick 139851078Speter * up any changes of the device state. 139951078Speter */ 140051078Speteropen_top: 140151078Speter while (com->state & CS_DTR_OFF) { 140251078Speter error = tsleep(&com->dtr_wait, TTIPRI | PCATCH, "siodtr", 0); 140351078Speter if (com_addr(unit) == NULL) 140451078Speter return (ENXIO); 140551078Speter if (error != 0 || com->gone) 140651078Speter goto out; 140751078Speter } 140851078Speter if (tp->t_state & TS_ISOPEN) { 140951078Speter /* 141051078Speter * The device is open, so everything has been initialized. 141151078Speter * Handle conflicts. 141251078Speter */ 141351078Speter if (mynor & CALLOUT_MASK) { 141451078Speter if (!com->active_out) { 141551078Speter error = EBUSY; 141651078Speter goto out; 141751078Speter } 141851078Speter } else { 141951078Speter if (com->active_out) { 142051078Speter if (flag & O_NONBLOCK) { 142151078Speter error = EBUSY; 142251078Speter goto out; 142351078Speter } 142451078Speter error = tsleep(&com->active_out, 142551078Speter TTIPRI | PCATCH, "siobi", 0); 142651078Speter if (com_addr(unit) == NULL) 142751078Speter return (ENXIO); 142851078Speter if (error != 0 || com->gone) 142951078Speter goto out; 143051078Speter goto open_top; 143151078Speter } 143251078Speter } 143351078Speter if (tp->t_state & TS_XCLUDE && 143451078Speter suser(p)) { 143551078Speter error = EBUSY; 143651078Speter goto out; 143751078Speter } 143851078Speter } else { 143965557Sjasone int intrsave; 144065557Sjasone 144151078Speter /* 144251078Speter * The device isn't open, so there are no conflicts. 144351078Speter * Initialize it. Initialization is done twice in many 144451078Speter * cases: to preempt sleeping callin opens if we are 144551078Speter * callout, and to complete a callin open after DCD rises. 144651078Speter */ 144751078Speter tp->t_oproc = comstart; 144851078Speter tp->t_param = comparam; 144951654Sphk tp->t_stop = comstop; 145051078Speter tp->t_dev = dev; 145151078Speter tp->t_termios = mynor & CALLOUT_MASK 145251078Speter ? com->it_out : com->it_in; 145351078Speter (void)commctl(com, TIOCM_DTR | TIOCM_RTS, DMSET); 145451078Speter com->poll = com->no_irq; 145551078Speter com->poll_output = com->loses_outints; 145651078Speter ++com->wopeners; 145751078Speter error = comparam(tp, &tp->t_termios); 145851078Speter --com->wopeners; 145951078Speter if (error != 0) 146051078Speter goto out; 146151078Speter /* 146251078Speter * XXX we should goto open_top if comparam() slept. 146351078Speter */ 146451078Speter if (com->hasfifo) { 146551078Speter /* 146651078Speter * (Re)enable and drain fifos. 146751078Speter * 146851078Speter * Certain SMC chips cause problems if the fifos 146951078Speter * are enabled while input is ready. Turn off the 147051078Speter * fifo if necessary to clear the input. We test 147151078Speter * the input ready bit after enabling the fifos 147251078Speter * since we've already enabled them in comparam() 147351078Speter * and to handle races between enabling and fresh 147451078Speter * input. 147551078Speter */ 147651078Speter while (TRUE) { 147760471Snyan sio_setreg(com, com_fifo, 147860471Snyan FIFO_RCV_RST | FIFO_XMT_RST 147960471Snyan | com->fifo_image); 148051078Speter /* 148151078Speter * XXX the delays are for superstitious 148251078Speter * historical reasons. It must be less than 148351078Speter * the character time at the maximum 148451078Speter * supported speed (87 usec at 115200 bps 148551078Speter * 8N1). Otherwise we might loop endlessly 148651078Speter * if data is streaming in. We used to use 148751078Speter * delays of 100. That usually worked 148851078Speter * because DELAY(100) used to usually delay 148951078Speter * for about 85 usec instead of 100. 149051078Speter */ 149151078Speter DELAY(50); 149251078Speter if (!(inb(com->line_status_port) & LSR_RXRDY)) 149351078Speter break; 149460471Snyan sio_setreg(com, com_fifo, 0); 149551078Speter DELAY(50); 149651078Speter (void) inb(com->data_port); 149751078Speter } 149851078Speter } 149951078Speter 150065557Sjasone intrsave = save_intr(); 150151078Speter disable_intr(); 150265557Sjasone COM_LOCK(); 150351078Speter (void) inb(com->line_status_port); 150451078Speter (void) inb(com->data_port); 150551078Speter com->prev_modem_status = com->last_modem_status 150651078Speter = inb(com->modem_status_port); 150751078Speter if (COM_IIR_TXRDYBUG(com->flags)) { 150851078Speter outb(com->intr_ctl_port, IER_ERXRDY | IER_ERLS 150951078Speter | IER_EMSC); 151051078Speter } else { 151151078Speter outb(com->intr_ctl_port, IER_ERXRDY | IER_ETXRDY 151251078Speter | IER_ERLS | IER_EMSC); 151351078Speter } 151465557Sjasone COM_UNLOCK(); 151565557Sjasone restore_intr(intrsave); 151651078Speter /* 151751078Speter * Handle initial DCD. Callout devices get a fake initial 151851078Speter * DCD (trapdoor DCD). If we are callout, then any sleeping 151951078Speter * callin opens get woken up and resume sleeping on "siobi" 152051078Speter * instead of "siodcd". 152151078Speter */ 152251078Speter /* 152351078Speter * XXX `mynor & CALLOUT_MASK' should be 152451078Speter * `tp->t_cflag & (SOFT_CARRIER | TRAPDOOR_CARRIER) where 152551078Speter * TRAPDOOR_CARRIER is the default initial state for callout 152651078Speter * devices and SOFT_CARRIER is like CLOCAL except it hides 152751078Speter * the true carrier. 152851078Speter */ 152951078Speter if (com->prev_modem_status & MSR_DCD || mynor & CALLOUT_MASK) 153051078Speter (*linesw[tp->t_line].l_modem)(tp, 1); 153151078Speter } 153251078Speter /* 153351078Speter * Wait for DCD if necessary. 153451078Speter */ 153551078Speter if (!(tp->t_state & TS_CARR_ON) && !(mynor & CALLOUT_MASK) 153651078Speter && !(tp->t_cflag & CLOCAL) && !(flag & O_NONBLOCK)) { 153751078Speter ++com->wopeners; 153851078Speter error = tsleep(TSA_CARR_ON(tp), TTIPRI | PCATCH, "siodcd", 0); 153951078Speter if (com_addr(unit) == NULL) 154051078Speter return (ENXIO); 154151078Speter --com->wopeners; 154251078Speter if (error != 0 || com->gone) 154351078Speter goto out; 154451078Speter goto open_top; 154551078Speter } 154651078Speter error = (*linesw[tp->t_line].l_open)(dev, tp); 154751078Speter disc_optim(tp, &tp->t_termios, com); 154851078Speter if (tp->t_state & TS_ISOPEN && mynor & CALLOUT_MASK) 154951078Speter com->active_out = TRUE; 155051078Speter siosettimeout(); 155151078Speterout: 155251078Speter splx(s); 155351078Speter if (!(tp->t_state & TS_ISOPEN) && com->wopeners == 0) 155451078Speter comhardclose(com); 155551078Speter return (error); 155651078Speter} 155751078Speter 155851078Speterstatic int 155951078Spetersioclose(dev, flag, mode, p) 156051078Speter dev_t dev; 156151078Speter int flag; 156251078Speter int mode; 156351078Speter struct proc *p; 156451078Speter{ 156551078Speter struct com_s *com; 156651078Speter int mynor; 156751078Speter int s; 156851078Speter struct tty *tp; 156951078Speter 157051078Speter mynor = minor(dev); 157151078Speter if (mynor & CONTROL_MASK) 157251078Speter return (0); 157351078Speter com = com_addr(MINOR_TO_UNIT(mynor)); 157457915Simp if (com == NULL) 157557915Simp return (ENODEV); 157651078Speter tp = com->tp; 157751078Speter s = spltty(); 157851078Speter (*linesw[tp->t_line].l_close)(tp, flag); 157951078Speter disc_optim(tp, &tp->t_termios, com); 158051654Sphk comstop(tp, FREAD | FWRITE); 158151078Speter comhardclose(com); 158251078Speter ttyclose(tp); 158351078Speter siosettimeout(); 158451078Speter splx(s); 158551078Speter if (com->gone) { 158651078Speter printf("sio%d: gone\n", com->unit); 158751078Speter s = spltty(); 158851078Speter if (com->ibuf != NULL) 158951078Speter free(com->ibuf, M_DEVBUF); 159051078Speter bzero(tp, sizeof *tp); 159151078Speter splx(s); 159251078Speter } 159351078Speter return (0); 159451078Speter} 159551078Speter 159651078Speterstatic void 159751078Spetercomhardclose(com) 159851078Speter struct com_s *com; 159951078Speter{ 160051078Speter int s; 160151078Speter struct tty *tp; 160251078Speter int unit; 160351078Speter 160451078Speter unit = com->unit; 160551078Speter s = spltty(); 160651078Speter com->poll = FALSE; 160751078Speter com->poll_output = FALSE; 160851078Speter com->do_timestamp = FALSE; 160951078Speter com->do_dcd_timestamp = FALSE; 161051078Speter com->pps.ppsparam.mode = 0; 161160471Snyan sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 161251078Speter { 161360471Snyan sio_setreg(com, com_ier, 0); 161451078Speter tp = com->tp; 161551078Speter if (tp->t_cflag & HUPCL 161651078Speter /* 161751078Speter * XXX we will miss any carrier drop between here and the 161851078Speter * next open. Perhaps we should watch DCD even when the 161951078Speter * port is closed; it is not sufficient to check it at 162051078Speter * the next open because it might go up and down while 162151078Speter * we're not watching. 162251078Speter */ 162351078Speter || (!com->active_out 162451078Speter && !(com->prev_modem_status & MSR_DCD) 162551078Speter && !(com->it_in.c_cflag & CLOCAL)) 162651078Speter || !(tp->t_state & TS_ISOPEN)) { 162751078Speter (void)commctl(com, TIOCM_DTR, DMBIC); 162851078Speter if (com->dtr_wait != 0 && !(com->state & CS_DTR_OFF)) { 162951078Speter timeout(siodtrwakeup, com, com->dtr_wait); 163051078Speter com->state |= CS_DTR_OFF; 163151078Speter } 163251078Speter } 163351078Speter } 163451078Speter if (com->hasfifo) { 163551078Speter /* 163651078Speter * Disable fifos so that they are off after controlled 163751078Speter * reboots. Some BIOSes fail to detect 16550s when the 163851078Speter * fifos are enabled. 163951078Speter */ 164060471Snyan sio_setreg(com, com_fifo, 0); 164151078Speter } 164251078Speter com->active_out = FALSE; 164351078Speter wakeup(&com->active_out); 164451078Speter wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */ 164551078Speter splx(s); 164651078Speter} 164751078Speter 164851078Speterstatic int 164951078Spetersioread(dev, uio, flag) 165051078Speter dev_t dev; 165151078Speter struct uio *uio; 165251078Speter int flag; 165351078Speter{ 165451078Speter int mynor; 165551078Speter struct com_s *com; 165651078Speter 165751078Speter mynor = minor(dev); 165851078Speter if (mynor & CONTROL_MASK) 165951078Speter return (ENODEV); 166051078Speter com = com_addr(MINOR_TO_UNIT(mynor)); 166157915Simp if (com == NULL || com->gone) 166251078Speter return (ENODEV); 166351078Speter return ((*linesw[com->tp->t_line].l_read)(com->tp, uio, flag)); 166451078Speter} 166551078Speter 166651078Speterstatic int 166751078Spetersiowrite(dev, uio, flag) 166851078Speter dev_t dev; 166951078Speter struct uio *uio; 167051078Speter int flag; 167151078Speter{ 167251078Speter int mynor; 167351078Speter struct com_s *com; 167451078Speter int unit; 167551078Speter 167651078Speter mynor = minor(dev); 167751078Speter if (mynor & CONTROL_MASK) 167851078Speter return (ENODEV); 167951078Speter 168051078Speter unit = MINOR_TO_UNIT(mynor); 168151078Speter com = com_addr(unit); 168257915Simp if (com == NULL || com->gone) 168351078Speter return (ENODEV); 168451078Speter /* 168551078Speter * (XXX) We disallow virtual consoles if the physical console is 168651078Speter * a serial port. This is in case there is a display attached that 168751078Speter * is not the console. In that situation we don't need/want the X 168851078Speter * server taking over the console. 168951078Speter */ 169051078Speter if (constty != NULL && unit == comconsole) 169151078Speter constty = NULL; 169251078Speter return ((*linesw[com->tp->t_line].l_write)(com->tp, uio, flag)); 169351078Speter} 169451078Speter 169551078Speterstatic void 169651078Spetersiobusycheck(chan) 169751078Speter void *chan; 169851078Speter{ 169951078Speter struct com_s *com; 170051078Speter int s; 170151078Speter 170251078Speter com = (struct com_s *)chan; 170351078Speter 170451078Speter /* 170551078Speter * Clear TS_BUSY if low-level output is complete. 170651078Speter * spl locking is sufficient because siointr1() does not set CS_BUSY. 170751078Speter * If siointr1() clears CS_BUSY after we look at it, then we'll get 170851078Speter * called again. Reading the line status port outside of siointr1() 170951078Speter * is safe because CS_BUSY is clear so there are no output interrupts 171051078Speter * to lose. 171151078Speter */ 171251078Speter s = spltty(); 171351078Speter if (com->state & CS_BUSY) 171451078Speter com->extra_state &= ~CSE_BUSYCHECK; /* False alarm. */ 171551078Speter else if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) 171651078Speter == (LSR_TSRE | LSR_TXRDY)) { 171751078Speter com->tp->t_state &= ~TS_BUSY; 171851078Speter ttwwakeup(com->tp); 171951078Speter com->extra_state &= ~CSE_BUSYCHECK; 172051078Speter } else 172151078Speter timeout(siobusycheck, com, hz / 100); 172251078Speter splx(s); 172351078Speter} 172451078Speter 172551078Speterstatic void 172651078Spetersiodtrwakeup(chan) 172751078Speter void *chan; 172851078Speter{ 172951078Speter struct com_s *com; 173051078Speter 173151078Speter com = (struct com_s *)chan; 173251078Speter com->state &= ~CS_DTR_OFF; 173351078Speter wakeup(&com->dtr_wait); 173451078Speter} 173551078Speter 173665557Sjasone/* 173765557Sjasone * Call this function with COM_LOCK. It will return with the lock still held. 173865557Sjasone */ 173951078Speterstatic void 174051078Spetersioinput(com) 174151078Speter struct com_s *com; 174251078Speter{ 174351078Speter u_char *buf; 174451078Speter int incc; 174551078Speter u_char line_status; 174651078Speter int recv_data; 174751078Speter struct tty *tp; 174865557Sjasone int intrsave; 174951078Speter 175051078Speter buf = com->ibuf; 175151078Speter tp = com->tp; 175251078Speter if (!(tp->t_state & TS_ISOPEN) || !(tp->t_cflag & CREAD)) { 175351078Speter com_events -= (com->iptr - com->ibuf); 175451078Speter com->iptr = com->ibuf; 175551078Speter return; 175651078Speter } 175751078Speter if (tp->t_state & TS_CAN_BYPASS_L_RINT) { 175851078Speter /* 175951078Speter * Avoid the grotesquely inefficient lineswitch routine 176051078Speter * (ttyinput) in "raw" mode. It usually takes about 450 176151078Speter * instructions (that's without canonical processing or echo!). 176251078Speter * slinput is reasonably fast (usually 40 instructions plus 176351078Speter * call overhead). 176451078Speter */ 176551078Speter do { 176665557Sjasone /* 176765557Sjasone * This may look odd, but it is using save-and-enable 176865557Sjasone * semantics instead of the save-and-disable semantics 176965557Sjasone * that are used everywhere else. 177065557Sjasone */ 177165557Sjasone intrsave = save_intr(); 177265557Sjasone COM_UNLOCK(); 177351078Speter enable_intr(); 177451078Speter incc = com->iptr - buf; 177551078Speter if (tp->t_rawq.c_cc + incc > tp->t_ihiwat 177651078Speter && (com->state & CS_RTS_IFLOW 177751078Speter || tp->t_iflag & IXOFF) 177851078Speter && !(tp->t_state & TS_TBLOCK)) 177951078Speter ttyblock(tp); 178051078Speter com->delta_error_counts[CE_TTY_BUF_OVERFLOW] 178151078Speter += b_to_q((char *)buf, incc, &tp->t_rawq); 178251078Speter buf += incc; 178351078Speter tk_nin += incc; 178451078Speter tk_rawcc += incc; 178551078Speter tp->t_rawcc += incc; 178651078Speter ttwakeup(tp); 178751078Speter if (tp->t_state & TS_TTSTOP 178851078Speter && (tp->t_iflag & IXANY 178951078Speter || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) { 179051078Speter tp->t_state &= ~TS_TTSTOP; 179151078Speter tp->t_lflag &= ~FLUSHO; 179251078Speter comstart(tp); 179351078Speter } 179465557Sjasone restore_intr(intrsave); 179565557Sjasone COM_LOCK(); 179651078Speter } while (buf < com->iptr); 179751078Speter } else { 179851078Speter do { 179965557Sjasone /* 180065557Sjasone * This may look odd, but it is using save-and-enable 180165557Sjasone * semantics instead of the save-and-disable semantics 180265557Sjasone * that are used everywhere else. 180365557Sjasone */ 180465557Sjasone intrsave = save_intr(); 180565557Sjasone COM_UNLOCK(); 180651078Speter enable_intr(); 180751078Speter line_status = buf[com->ierroff]; 180851078Speter recv_data = *buf++; 180951078Speter if (line_status 181051078Speter & (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) { 181151078Speter if (line_status & LSR_BI) 181251078Speter recv_data |= TTY_BI; 181351078Speter if (line_status & LSR_FE) 181451078Speter recv_data |= TTY_FE; 181551078Speter if (line_status & LSR_OE) 181651078Speter recv_data |= TTY_OE; 181751078Speter if (line_status & LSR_PE) 181851078Speter recv_data |= TTY_PE; 181951078Speter } 182051078Speter (*linesw[tp->t_line].l_rint)(recv_data, tp); 182165557Sjasone restore_intr(intrsave); 182265557Sjasone COM_LOCK(); 182351078Speter } while (buf < com->iptr); 182451078Speter } 182551078Speter com_events -= (com->iptr - com->ibuf); 182651078Speter com->iptr = com->ibuf; 182751078Speter 182851078Speter /* 182951078Speter * There is now room for another low-level buffer full of input, 183051078Speter * so enable RTS if it is now disabled and there is room in the 183151078Speter * high-level buffer. 183251078Speter */ 183351078Speter if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & MCR_RTS) && 183451078Speter !(tp->t_state & TS_TBLOCK)) 183551078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 183651078Speter} 183751078Speter 183851078Spetervoid 183951078Spetersiointr(arg) 184051078Speter void *arg; 184151078Speter{ 184251078Speter#ifndef COM_MULTIPORT 184351078Speter COM_LOCK(); 184451078Speter siointr1((struct com_s *) arg); 184551078Speter COM_UNLOCK(); 184651078Speter#else /* COM_MULTIPORT */ 184751078Speter bool_t possibly_more_intrs; 184851078Speter int unit; 184951078Speter struct com_s *com; 185051078Speter 185151078Speter /* 185251078Speter * Loop until there is no activity on any port. This is necessary 185351078Speter * to get an interrupt edge more than to avoid another interrupt. 185451078Speter * If the IRQ signal is just an OR of the IRQ signals from several 185551078Speter * devices, then the edge from one may be lost because another is 185651078Speter * on. 185751078Speter */ 185851078Speter COM_LOCK(); 185951078Speter do { 186051078Speter possibly_more_intrs = FALSE; 186153344Speter for (unit = 0; unit < sio_numunits; ++unit) { 186251078Speter com = com_addr(unit); 186351078Speter /* 186451078Speter * XXX COM_LOCK(); 186551078Speter * would it work here, or be counter-productive? 186651078Speter */ 186751078Speter if (com != NULL 186851078Speter && !com->gone 186951078Speter && (inb(com->int_id_port) & IIR_IMASK) 187051078Speter != IIR_NOPEND) { 187151078Speter siointr1(com); 187251078Speter possibly_more_intrs = TRUE; 187351078Speter } 187451078Speter /* XXX COM_UNLOCK(); */ 187551078Speter } 187651078Speter } while (possibly_more_intrs); 187751078Speter COM_UNLOCK(); 187851078Speter#endif /* COM_MULTIPORT */ 187951078Speter} 188051078Speter 188151078Speterstatic void 188251078Spetersiointr1(com) 188351078Speter struct com_s *com; 188451078Speter{ 188551078Speter u_char line_status; 188651078Speter u_char modem_status; 188751078Speter u_char *ioptr; 188851078Speter u_char recv_data; 188951078Speter u_char int_ctl; 189051078Speter u_char int_ctl_new; 189151078Speter struct timecounter *tc; 189251078Speter u_int count; 189351078Speter 189451078Speter int_ctl = inb(com->intr_ctl_port); 189551078Speter int_ctl_new = int_ctl; 189651078Speter 189751078Speter while (!com->gone) { 189851078Speter if (com->pps.ppsparam.mode & PPS_CAPTUREBOTH) { 189951078Speter modem_status = inb(com->modem_status_port); 190051078Speter if ((modem_status ^ com->last_modem_status) & MSR_DCD) { 190151078Speter tc = timecounter; 190251078Speter count = tc->tc_get_timecount(tc); 190351078Speter pps_event(&com->pps, tc, count, 190451078Speter (modem_status & MSR_DCD) ? 190551078Speter PPS_CAPTUREASSERT : PPS_CAPTURECLEAR); 190651078Speter } 190751078Speter } 190851078Speter line_status = inb(com->line_status_port); 190951078Speter 191051078Speter /* input event? (check first to help avoid overruns) */ 191151078Speter while (line_status & LSR_RCV_MASK) { 191251078Speter /* break/unnattached error bits or real input? */ 191351078Speter if (!(line_status & LSR_RXRDY)) 191451078Speter recv_data = 0; 191551078Speter else 191651078Speter recv_data = inb(com->data_port); 191761649Sps#if defined(DDB) && defined(ALT_BREAK_TO_DEBUGGER) 191861649Sps /* 191961649Sps * Solaris implements a new BREAK which is initiated 192061649Sps * by a character sequence CR ~ ^b which is similar 192161649Sps * to a familiar pattern used on Sun servers by the 192261649Sps * Remote Console. 192361649Sps */ 192461649Sps#define KEY_CRTLB 2 /* ^B */ 192561649Sps#define KEY_CR 13 /* CR '\r' */ 192661649Sps#define KEY_TILDE 126 /* ~ */ 192761649Sps 192861649Sps if (com->unit == comconsole) { 192961649Sps static int brk_state1 = 0, brk_state2 = 0; 193061649Sps if (recv_data == KEY_CR) { 193161649Sps brk_state1 = recv_data; 193261649Sps brk_state2 = 0; 193365557Sjasone } else if (brk_state1 == KEY_CR 193465557Sjasone && (recv_data == KEY_TILDE 193565557Sjasone || recv_data == KEY_CRTLB)) { 193661649Sps if (recv_data == KEY_TILDE) 193761649Sps brk_state2 = recv_data; 193865557Sjasone else if (brk_state2 == KEY_TILDE 193965557Sjasone && recv_data == KEY_CRTLB) { 194061649Sps breakpoint(); 194165557Sjasone brk_state1 = 0; 194265557Sjasone brk_state2 = 0; 194361649Sps goto cont; 194461649Sps } else 194561649Sps brk_state2 = 0; 194661649Sps } else 194761649Sps brk_state1 = 0; 194861649Sps } 194961649Sps#endif 195051078Speter if (line_status & (LSR_BI | LSR_FE | LSR_PE)) { 195151078Speter /* 195251078Speter * Don't store BI if IGNBRK or FE/PE if IGNPAR. 195351078Speter * Otherwise, push the work to a higher level 195451078Speter * (to handle PARMRK) if we're bypassing. 195551078Speter * Otherwise, convert BI/FE and PE+INPCK to 0. 195651078Speter * 195751078Speter * This makes bypassing work right in the 195851078Speter * usual "raw" case (IGNBRK set, and IGNPAR 195951078Speter * and INPCK clear). 196051078Speter * 196151078Speter * Note: BI together with FE/PE means just BI. 196251078Speter */ 196351078Speter if (line_status & LSR_BI) { 196451078Speter#if defined(DDB) && defined(BREAK_TO_DEBUGGER) 196551078Speter if (com->unit == comconsole) { 196651078Speter breakpoint(); 196751078Speter goto cont; 196851078Speter } 196951078Speter#endif 197051078Speter if (com->tp == NULL 197151078Speter || com->tp->t_iflag & IGNBRK) 197251078Speter goto cont; 197351078Speter } else { 197451078Speter if (com->tp == NULL 197551078Speter || com->tp->t_iflag & IGNPAR) 197651078Speter goto cont; 197751078Speter } 197851078Speter if (com->tp->t_state & TS_CAN_BYPASS_L_RINT 197951078Speter && (line_status & (LSR_BI | LSR_FE) 198051078Speter || com->tp->t_iflag & INPCK)) 198151078Speter recv_data = 0; 198251078Speter } 198351078Speter ++com->bytes_in; 198451078Speter if (com->hotchar != 0 && recv_data == com->hotchar) 198567551Sjhb sched_swi(sio_fast_ih, SWI_NOSWITCH); 198651078Speter ioptr = com->iptr; 198751078Speter if (ioptr >= com->ibufend) 198851078Speter CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW); 198951078Speter else { 199051078Speter if (com->do_timestamp) 199151078Speter microtime(&com->timestamp); 199251078Speter ++com_events; 199367551Sjhb sched_swi(sio_slow_ih, SWI_DELAY); 199451078Speter#if 0 /* for testing input latency vs efficiency */ 199551078Speterif (com->iptr - com->ibuf == 8) 199667551Sjhb sched_swi(sio_fast_ih, SWI_NOSWITCH); 199751078Speter#endif 199851078Speter ioptr[0] = recv_data; 199951078Speter ioptr[com->ierroff] = line_status; 200051078Speter com->iptr = ++ioptr; 200151078Speter if (ioptr == com->ihighwater 200251078Speter && com->state & CS_RTS_IFLOW) 200351078Speter outb(com->modem_ctl_port, 200451078Speter com->mcr_image &= ~MCR_RTS); 200551078Speter if (line_status & LSR_OE) 200651078Speter CE_RECORD(com, CE_OVERRUN); 200751078Speter } 200851078Spetercont: 200951078Speter /* 201051078Speter * "& 0x7F" is to avoid the gcc-1.40 generating a slow 201151078Speter * jump from the top of the loop to here 201251078Speter */ 201351078Speter line_status = inb(com->line_status_port) & 0x7F; 201451078Speter } 201551078Speter 201651078Speter /* modem status change? (always check before doing output) */ 201751078Speter modem_status = inb(com->modem_status_port); 201851078Speter if (modem_status != com->last_modem_status) { 201951078Speter if (com->do_dcd_timestamp 202051078Speter && !(com->last_modem_status & MSR_DCD) 202151078Speter && modem_status & MSR_DCD) 202251078Speter microtime(&com->dcd_timestamp); 202351078Speter 202451078Speter /* 202551078Speter * Schedule high level to handle DCD changes. Note 202651078Speter * that we don't use the delta bits anywhere. Some 202751078Speter * UARTs mess them up, and it's easy to remember the 202851078Speter * previous bits and calculate the delta. 202951078Speter */ 203051078Speter com->last_modem_status = modem_status; 203151078Speter if (!(com->state & CS_CHECKMSR)) { 203251078Speter com_events += LOTS_OF_EVENTS; 203351078Speter com->state |= CS_CHECKMSR; 203467551Sjhb sched_swi(sio_fast_ih, SWI_NOSWITCH); 203551078Speter } 203651078Speter 203751078Speter /* handle CTS change immediately for crisp flow ctl */ 203851078Speter if (com->state & CS_CTS_OFLOW) { 203951078Speter if (modem_status & MSR_CTS) 204051078Speter com->state |= CS_ODEVREADY; 204151078Speter else 204251078Speter com->state &= ~CS_ODEVREADY; 204351078Speter } 204451078Speter } 204551078Speter 204651078Speter /* output queued and everything ready? */ 204751078Speter if (line_status & LSR_TXRDY 204851078Speter && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { 204951078Speter ioptr = com->obufq.l_head; 205051078Speter if (com->tx_fifo_size > 1) { 205151078Speter u_int ocount; 205251078Speter 205351078Speter ocount = com->obufq.l_tail - ioptr; 205451078Speter if (ocount > com->tx_fifo_size) 205551078Speter ocount = com->tx_fifo_size; 205651078Speter com->bytes_out += ocount; 205751078Speter do 205851078Speter outb(com->data_port, *ioptr++); 205951078Speter while (--ocount != 0); 206051078Speter } else { 206151078Speter outb(com->data_port, *ioptr++); 206251078Speter ++com->bytes_out; 206351078Speter } 206451078Speter com->obufq.l_head = ioptr; 206551078Speter if (COM_IIR_TXRDYBUG(com->flags)) { 206651078Speter int_ctl_new = int_ctl | IER_ETXRDY; 206751078Speter } 206851078Speter if (ioptr >= com->obufq.l_tail) { 206951078Speter struct lbq *qp; 207051078Speter 207151078Speter qp = com->obufq.l_next; 207251078Speter qp->l_queued = FALSE; 207351078Speter qp = qp->l_next; 207451078Speter if (qp != NULL) { 207551078Speter com->obufq.l_head = qp->l_head; 207651078Speter com->obufq.l_tail = qp->l_tail; 207751078Speter com->obufq.l_next = qp; 207851078Speter } else { 207951078Speter /* output just completed */ 208053344Speter if (COM_IIR_TXRDYBUG(com->flags)) { 208151078Speter int_ctl_new = int_ctl & ~IER_ETXRDY; 208251078Speter } 208351078Speter com->state &= ~CS_BUSY; 208451078Speter } 208551078Speter if (!(com->state & CS_ODONE)) { 208651078Speter com_events += LOTS_OF_EVENTS; 208751078Speter com->state |= CS_ODONE; 208867551Sjhb /* handle at high level ASAP */ 208967551Sjhb sched_swi(sio_fast_ih, SWI_NOSWITCH); 209051078Speter } 209151078Speter } 209253344Speter if (COM_IIR_TXRDYBUG(com->flags) && (int_ctl != int_ctl_new)) { 209351078Speter outb(com->intr_ctl_port, int_ctl_new); 209451078Speter } 209551078Speter } 209651078Speter 209751078Speter /* finished? */ 209851078Speter#ifndef COM_MULTIPORT 209951078Speter if ((inb(com->int_id_port) & IIR_IMASK) == IIR_NOPEND) 210051078Speter#endif /* COM_MULTIPORT */ 210151078Speter return; 210251078Speter } 210351078Speter} 210451078Speter 210551078Speterstatic int 210651078Spetersioioctl(dev, cmd, data, flag, p) 210751078Speter dev_t dev; 210851078Speter u_long cmd; 210951078Speter caddr_t data; 211051078Speter int flag; 211151078Speter struct proc *p; 211251078Speter{ 211351078Speter struct com_s *com; 211451078Speter int error; 211551078Speter int mynor; 211651078Speter int s; 211751078Speter struct tty *tp; 211851078Speter#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 211951078Speter u_long oldcmd; 212051078Speter struct termios term; 212151078Speter#endif 212251078Speter 212351078Speter mynor = minor(dev); 212451078Speter com = com_addr(MINOR_TO_UNIT(mynor)); 212557915Simp if (com == NULL || com->gone) 212651078Speter return (ENODEV); 212751078Speter if (mynor & CONTROL_MASK) { 212851078Speter struct termios *ct; 212951078Speter 213051078Speter switch (mynor & CONTROL_MASK) { 213151078Speter case CONTROL_INIT_STATE: 213251078Speter ct = mynor & CALLOUT_MASK ? &com->it_out : &com->it_in; 213351078Speter break; 213451078Speter case CONTROL_LOCK_STATE: 213551078Speter ct = mynor & CALLOUT_MASK ? &com->lt_out : &com->lt_in; 213651078Speter break; 213751078Speter default: 213851078Speter return (ENODEV); /* /dev/nodev */ 213951078Speter } 214051078Speter switch (cmd) { 214151078Speter case TIOCSETA: 214251078Speter error = suser(p); 214351078Speter if (error != 0) 214451078Speter return (error); 214551078Speter *ct = *(struct termios *)data; 214651078Speter return (0); 214751078Speter case TIOCGETA: 214851078Speter *(struct termios *)data = *ct; 214951078Speter return (0); 215051078Speter case TIOCGETD: 215151078Speter *(int *)data = TTYDISC; 215251078Speter return (0); 215351078Speter case TIOCGWINSZ: 215451078Speter bzero(data, sizeof(struct winsize)); 215551078Speter return (0); 215651078Speter default: 215751078Speter return (ENOTTY); 215851078Speter } 215951078Speter } 216051078Speter tp = com->tp; 216151078Speter#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 216251078Speter term = tp->t_termios; 216351078Speter oldcmd = cmd; 216451078Speter error = ttsetcompat(tp, &cmd, data, &term); 216551078Speter if (error != 0) 216651078Speter return (error); 216751078Speter if (cmd != oldcmd) 216851078Speter data = (caddr_t)&term; 216951078Speter#endif 217051078Speter if (cmd == TIOCSETA || cmd == TIOCSETAW || cmd == TIOCSETAF) { 217151078Speter int cc; 217251078Speter struct termios *dt = (struct termios *)data; 217351078Speter struct termios *lt = mynor & CALLOUT_MASK 217451078Speter ? &com->lt_out : &com->lt_in; 217551078Speter 217651078Speter dt->c_iflag = (tp->t_iflag & lt->c_iflag) 217751078Speter | (dt->c_iflag & ~lt->c_iflag); 217851078Speter dt->c_oflag = (tp->t_oflag & lt->c_oflag) 217951078Speter | (dt->c_oflag & ~lt->c_oflag); 218051078Speter dt->c_cflag = (tp->t_cflag & lt->c_cflag) 218151078Speter | (dt->c_cflag & ~lt->c_cflag); 218251078Speter dt->c_lflag = (tp->t_lflag & lt->c_lflag) 218351078Speter | (dt->c_lflag & ~lt->c_lflag); 218451078Speter for (cc = 0; cc < NCCS; ++cc) 218551078Speter if (lt->c_cc[cc] != 0) 218651078Speter dt->c_cc[cc] = tp->t_cc[cc]; 218751078Speter if (lt->c_ispeed != 0) 218851078Speter dt->c_ispeed = tp->t_ispeed; 218951078Speter if (lt->c_ospeed != 0) 219051078Speter dt->c_ospeed = tp->t_ospeed; 219151078Speter } 219251078Speter error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); 219351078Speter if (error != ENOIOCTL) 219451078Speter return (error); 219551078Speter s = spltty(); 219651078Speter error = ttioctl(tp, cmd, data, flag); 219751078Speter disc_optim(tp, &tp->t_termios, com); 219851078Speter if (error != ENOIOCTL) { 219951078Speter splx(s); 220051078Speter return (error); 220151078Speter } 220251078Speter switch (cmd) { 220351078Speter case TIOCSBRK: 220460471Snyan sio_setreg(com, com_cfcr, com->cfcr_image |= CFCR_SBREAK); 220551078Speter break; 220651078Speter case TIOCCBRK: 220760471Snyan sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 220851078Speter break; 220951078Speter case TIOCSDTR: 221051078Speter (void)commctl(com, TIOCM_DTR, DMBIS); 221151078Speter break; 221251078Speter case TIOCCDTR: 221351078Speter (void)commctl(com, TIOCM_DTR, DMBIC); 221451078Speter break; 221551078Speter /* 221651078Speter * XXX should disallow changing MCR_RTS if CS_RTS_IFLOW is set. The 221751078Speter * changes get undone on the next call to comparam(). 221851078Speter */ 221951078Speter case TIOCMSET: 222051078Speter (void)commctl(com, *(int *)data, DMSET); 222151078Speter break; 222251078Speter case TIOCMBIS: 222351078Speter (void)commctl(com, *(int *)data, DMBIS); 222451078Speter break; 222551078Speter case TIOCMBIC: 222651078Speter (void)commctl(com, *(int *)data, DMBIC); 222751078Speter break; 222851078Speter case TIOCMGET: 222951078Speter *(int *)data = commctl(com, 0, DMGET); 223051078Speter break; 223151078Speter case TIOCMSDTRWAIT: 223251078Speter /* must be root since the wait applies to following logins */ 223351078Speter error = suser(p); 223451078Speter if (error != 0) { 223551078Speter splx(s); 223651078Speter return (error); 223751078Speter } 223851078Speter com->dtr_wait = *(int *)data * hz / 100; 223951078Speter break; 224051078Speter case TIOCMGDTRWAIT: 224151078Speter *(int *)data = com->dtr_wait * 100 / hz; 224251078Speter break; 224351078Speter case TIOCTIMESTAMP: 224451078Speter com->do_timestamp = TRUE; 224551078Speter *(struct timeval *)data = com->timestamp; 224651078Speter break; 224751078Speter case TIOCDCDTIMESTAMP: 224851078Speter com->do_dcd_timestamp = TRUE; 224951078Speter *(struct timeval *)data = com->dcd_timestamp; 225051078Speter break; 225151078Speter default: 225251078Speter splx(s); 225351078Speter error = pps_ioctl(cmd, data, &com->pps); 225451078Speter if (error == ENODEV) 225551078Speter error = ENOTTY; 225651078Speter return (error); 225751078Speter } 225851078Speter splx(s); 225951078Speter return (0); 226051078Speter} 226151078Speter 226265557Sjasone/* software interrupt handler for SWI_TTY */ 226351078Speterstatic void 226467551Sjhbsiopoll(void *dummy) 226551078Speter{ 226651078Speter int unit; 226765557Sjasone int intrsave; 226851078Speter 226951078Speter if (com_events == 0) 227051078Speter return; 227151078Speterrepeat: 227253344Speter for (unit = 0; unit < sio_numunits; ++unit) { 227351078Speter struct com_s *com; 227451078Speter int incc; 227551078Speter struct tty *tp; 227651078Speter 227751078Speter com = com_addr(unit); 227851078Speter if (com == NULL) 227951078Speter continue; 228051078Speter tp = com->tp; 228151078Speter if (tp == NULL || com->gone) { 228251078Speter /* 228351078Speter * Discard any events related to never-opened or 228451078Speter * going-away devices. 228551078Speter */ 228665557Sjasone intrsave = save_intr(); 228751078Speter disable_intr(); 228865557Sjasone COM_LOCK(); 228951078Speter incc = com->iptr - com->ibuf; 229051078Speter com->iptr = com->ibuf; 229151078Speter if (com->state & CS_CHECKMSR) { 229251078Speter incc += LOTS_OF_EVENTS; 229351078Speter com->state &= ~CS_CHECKMSR; 229451078Speter } 229551078Speter com_events -= incc; 229665557Sjasone COM_UNLOCK(); 229765557Sjasone restore_intr(intrsave); 229851078Speter continue; 229951078Speter } 230051078Speter if (com->iptr != com->ibuf) { 230165557Sjasone intrsave = save_intr(); 230251078Speter disable_intr(); 230365557Sjasone COM_LOCK(); 230451078Speter sioinput(com); 230565557Sjasone COM_UNLOCK(); 230665557Sjasone restore_intr(intrsave); 230751078Speter } 230851078Speter if (com->state & CS_CHECKMSR) { 230951078Speter u_char delta_modem_status; 231051078Speter 231165557Sjasone intrsave = save_intr(); 231251078Speter disable_intr(); 231365557Sjasone COM_LOCK(); 231451078Speter delta_modem_status = com->last_modem_status 231551078Speter ^ com->prev_modem_status; 231651078Speter com->prev_modem_status = com->last_modem_status; 231751078Speter com_events -= LOTS_OF_EVENTS; 231851078Speter com->state &= ~CS_CHECKMSR; 231965557Sjasone COM_UNLOCK(); 232065557Sjasone restore_intr(intrsave); 232151078Speter if (delta_modem_status & MSR_DCD) 232251078Speter (*linesw[tp->t_line].l_modem) 232351078Speter (tp, com->prev_modem_status & MSR_DCD); 232451078Speter } 232551078Speter if (com->state & CS_ODONE) { 232665557Sjasone intrsave = save_intr(); 232751078Speter disable_intr(); 232865557Sjasone COM_LOCK(); 232951078Speter com_events -= LOTS_OF_EVENTS; 233051078Speter com->state &= ~CS_ODONE; 233165557Sjasone COM_UNLOCK(); 233265557Sjasone restore_intr(intrsave); 233351078Speter if (!(com->state & CS_BUSY) 233451078Speter && !(com->extra_state & CSE_BUSYCHECK)) { 233551078Speter timeout(siobusycheck, com, hz / 100); 233651078Speter com->extra_state |= CSE_BUSYCHECK; 233751078Speter } 233851078Speter (*linesw[tp->t_line].l_start)(tp); 233951078Speter } 234051078Speter if (com_events == 0) 234151078Speter break; 234251078Speter } 234351078Speter if (com_events >= LOTS_OF_EVENTS) 234451078Speter goto repeat; 234551078Speter} 234651078Speter 234751078Speterstatic int 234851078Spetercomparam(tp, t) 234951078Speter struct tty *tp; 235051078Speter struct termios *t; 235151078Speter{ 235251078Speter u_int cfcr; 235351078Speter int cflag; 235451078Speter struct com_s *com; 235551078Speter int divisor; 235651078Speter u_char dlbh; 235751078Speter u_char dlbl; 235851078Speter int s; 235951078Speter int unit; 236065557Sjasone int intrsave; 236151078Speter 236251078Speter /* do historical conversions */ 236351078Speter if (t->c_ispeed == 0) 236451078Speter t->c_ispeed = t->c_ospeed; 236551078Speter 236651078Speter /* check requested parameters */ 236751078Speter divisor = ttspeedtab(t->c_ospeed, comspeedtab); 236851078Speter if (divisor < 0 || (divisor > 0 && t->c_ispeed != t->c_ospeed)) 236951078Speter return (EINVAL); 237051078Speter 237151078Speter /* parameters are OK, convert them to the com struct and the device */ 237251078Speter unit = DEV_TO_UNIT(tp->t_dev); 237351078Speter com = com_addr(unit); 237457915Simp if (com == NULL) 237557915Simp return (ENODEV); 237651078Speter s = spltty(); 237751078Speter if (divisor == 0) 237851078Speter (void)commctl(com, TIOCM_DTR, DMBIC); /* hang up line */ 237951078Speter else 238051078Speter (void)commctl(com, TIOCM_DTR, DMBIS); 238151078Speter cflag = t->c_cflag; 238251078Speter switch (cflag & CSIZE) { 238351078Speter case CS5: 238451078Speter cfcr = CFCR_5BITS; 238551078Speter break; 238651078Speter case CS6: 238751078Speter cfcr = CFCR_6BITS; 238851078Speter break; 238951078Speter case CS7: 239051078Speter cfcr = CFCR_7BITS; 239151078Speter break; 239251078Speter default: 239351078Speter cfcr = CFCR_8BITS; 239451078Speter break; 239551078Speter } 239651078Speter if (cflag & PARENB) { 239751078Speter cfcr |= CFCR_PENAB; 239851078Speter if (!(cflag & PARODD)) 239951078Speter cfcr |= CFCR_PEVEN; 240051078Speter } 240151078Speter if (cflag & CSTOPB) 240251078Speter cfcr |= CFCR_STOPB; 240351078Speter 240451078Speter if (com->hasfifo && divisor != 0) { 240551078Speter /* 240651078Speter * Use a fifo trigger level low enough so that the input 240751078Speter * latency from the fifo is less than about 16 msec and 240851078Speter * the total latency is less than about 30 msec. These 240951078Speter * latencies are reasonable for humans. Serial comms 241051078Speter * protocols shouldn't expect anything better since modem 241151078Speter * latencies are larger. 241251078Speter */ 241351078Speter com->fifo_image = t->c_ospeed <= 4800 241451078Speter ? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_HIGH; 241551078Speter#ifdef COM_ESP 241651078Speter /* 241751078Speter * The Hayes ESP card needs the fifo DMA mode bit set 241851078Speter * in compatibility mode. If not, it will interrupt 241951078Speter * for each character received. 242051078Speter */ 242151078Speter if (com->esp) 242251078Speter com->fifo_image |= FIFO_DMA_MODE; 242351078Speter#endif 242460471Snyan sio_setreg(com, com_fifo, com->fifo_image); 242551078Speter } 242651078Speter 242765605Sjhb /* 242865605Sjhb * This returns with interrupts disabled so that we can complete 242965605Sjhb * the speed change atomically. Keeping interrupts disabled is 243065605Sjhb * especially important while com_data is hidden. 243165605Sjhb */ 243265557Sjasone intrsave = save_intr(); 243365605Sjhb (void) siosetwater(com, t->c_ispeed); 243465557Sjasone 243551078Speter if (divisor != 0) { 243660471Snyan sio_setreg(com, com_cfcr, cfcr | CFCR_DLAB); 243751078Speter /* 243851078Speter * Only set the divisor registers if they would change, 243951078Speter * since on some 16550 incompatibles (UMC8669F), setting 244051078Speter * them while input is arriving them loses sync until 244151078Speter * data stops arriving. 244251078Speter */ 244351078Speter dlbl = divisor & 0xFF; 244460471Snyan if (sio_getreg(com, com_dlbl) != dlbl) 244560471Snyan sio_setreg(com, com_dlbl, dlbl); 244651078Speter dlbh = (u_int) divisor >> 8; 244760471Snyan if (sio_getreg(com, com_dlbh) != dlbh) 244860471Snyan sio_setreg(com, com_dlbh, dlbh); 244951078Speter } 245051078Speter 245160471Snyan sio_setreg(com, com_cfcr, com->cfcr_image = cfcr); 245251078Speter 245351078Speter if (!(tp->t_state & TS_TTSTOP)) 245451078Speter com->state |= CS_TTGO; 245551078Speter 245651078Speter if (cflag & CRTS_IFLOW) { 245751078Speter if (com->st16650a) { 245860471Snyan sio_setreg(com, com_cfcr, 0xbf); 245960471Snyan sio_setreg(com, com_fifo, 246060471Snyan sio_getreg(com, com_fifo) | 0x40); 246151078Speter } 246251078Speter com->state |= CS_RTS_IFLOW; 246351078Speter /* 246451078Speter * If CS_RTS_IFLOW just changed from off to on, the change 246551078Speter * needs to be propagated to MCR_RTS. This isn't urgent, 246651078Speter * so do it later by calling comstart() instead of repeating 246751078Speter * a lot of code from comstart() here. 246851078Speter */ 246951078Speter } else if (com->state & CS_RTS_IFLOW) { 247051078Speter com->state &= ~CS_RTS_IFLOW; 247151078Speter /* 247251078Speter * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS 247351078Speter * on here, since comstart() won't do it later. 247451078Speter */ 247551078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 247651078Speter if (com->st16650a) { 247760471Snyan sio_setreg(com, com_cfcr, 0xbf); 247860471Snyan sio_setreg(com, com_fifo, 247960471Snyan sio_getreg(com, com_fifo) & ~0x40); 248051078Speter } 248151078Speter } 248251078Speter 248351078Speter 248451078Speter /* 248551078Speter * Set up state to handle output flow control. 248651078Speter * XXX - worth handling MDMBUF (DCD) flow control at the lowest level? 248751078Speter * Now has 10+ msec latency, while CTS flow has 50- usec latency. 248851078Speter */ 248951078Speter com->state |= CS_ODEVREADY; 249051078Speter com->state &= ~CS_CTS_OFLOW; 249151078Speter if (cflag & CCTS_OFLOW) { 249251078Speter com->state |= CS_CTS_OFLOW; 249351078Speter if (!(com->last_modem_status & MSR_CTS)) 249451078Speter com->state &= ~CS_ODEVREADY; 249551078Speter if (com->st16650a) { 249660471Snyan sio_setreg(com, com_cfcr, 0xbf); 249760471Snyan sio_setreg(com, com_fifo, 249860471Snyan sio_getreg(com, com_fifo) | 0x80); 249951078Speter } 250051078Speter } else { 250151078Speter if (com->st16650a) { 250260471Snyan sio_setreg(com, com_cfcr, 0xbf); 250360471Snyan sio_setreg(com, com_fifo, 250460471Snyan sio_getreg(com, com_fifo) & ~0x80); 250551078Speter } 250651078Speter } 250751078Speter 250860471Snyan sio_setreg(com, com_cfcr, com->cfcr_image); 250951078Speter 251051078Speter /* XXX shouldn't call functions while intrs are disabled. */ 251151078Speter disc_optim(tp, t, com); 251251078Speter /* 251351078Speter * Recover from fiddling with CS_TTGO. We used to call siointr1() 251451078Speter * unconditionally, but that defeated the careful discarding of 251551078Speter * stale input in sioopen(). 251651078Speter */ 251751078Speter if (com->state >= (CS_BUSY | CS_TTGO)) 251851078Speter siointr1(com); 251951078Speter 252065557Sjasone COM_UNLOCK(); 252165557Sjasone restore_intr(intrsave); 252251078Speter splx(s); 252351078Speter comstart(tp); 252451078Speter if (com->ibufold != NULL) { 252551078Speter free(com->ibufold, M_DEVBUF); 252651078Speter com->ibufold = NULL; 252751078Speter } 252851078Speter return (0); 252951078Speter} 253051078Speter 253165605Sjhb/* 253265605Sjhb * This function must be called with interrupts enabled and the com_lock 253365605Sjhb * unlocked. It will return with interrupts disabled and the com_lock locked. 253465605Sjhb */ 253551078Speterstatic int 253665605Sjhbsiosetwater(com, speed) 253751078Speter struct com_s *com; 253851078Speter speed_t speed; 253951078Speter{ 254051078Speter int cp4ticks; 254151078Speter u_char *ibuf; 254251078Speter int ibufsize; 254351078Speter struct tty *tp; 254451078Speter 254551078Speter /* 254651078Speter * Make the buffer size large enough to handle a softtty interrupt 254751078Speter * latency of about 2 ticks without loss of throughput or data 254851078Speter * (about 3 ticks if input flow control is not used or not honoured, 254951078Speter * but a bit less for CS5-CS7 modes). 255051078Speter */ 255151078Speter cp4ticks = speed / 10 / hz * 4; 255251078Speter for (ibufsize = 128; ibufsize < cp4ticks;) 255351078Speter ibufsize <<= 1; 255465605Sjhb if (ibufsize == com->ibufsize) { 255565605Sjhb disable_intr(); 255665605Sjhb COM_LOCK(); 255751078Speter return (0); 255865605Sjhb } 255951078Speter 256051078Speter /* 256151078Speter * Allocate input buffer. The extra factor of 2 in the size is 256251078Speter * to allow for an error byte for each input byte. 256351078Speter */ 256451078Speter ibuf = malloc(2 * ibufsize, M_DEVBUF, M_NOWAIT); 256565605Sjhb if (ibuf == NULL) { 256665605Sjhb disable_intr(); 256765605Sjhb COM_LOCK(); 256851078Speter return (ENOMEM); 256965605Sjhb } 257051078Speter 257151078Speter /* Initialize non-critical variables. */ 257251078Speter com->ibufold = com->ibuf; 257351078Speter com->ibufsize = ibufsize; 257451078Speter tp = com->tp; 257551078Speter if (tp != NULL) { 257651078Speter tp->t_ififosize = 2 * ibufsize; 257751078Speter tp->t_ispeedwat = (speed_t)-1; 257851078Speter tp->t_ospeedwat = (speed_t)-1; 257951078Speter } 258051078Speter 258151078Speter /* 258251078Speter * Read current input buffer, if any. Continue with interrupts 258351078Speter * disabled. 258451078Speter */ 258551078Speter disable_intr(); 258665605Sjhb COM_LOCK(); 258751078Speter if (com->iptr != com->ibuf) 258851078Speter sioinput(com); 258951078Speter 259051078Speter /*- 259151078Speter * Initialize critical variables, including input buffer watermarks. 259251078Speter * The external device is asked to stop sending when the buffer 259351078Speter * exactly reaches high water, or when the high level requests it. 259451078Speter * The high level is notified immediately (rather than at a later 259551078Speter * clock tick) when this watermark is reached. 259651078Speter * The buffer size is chosen so the watermark should almost never 259751078Speter * be reached. 259851078Speter * The low watermark is invisibly 0 since the buffer is always 259951078Speter * emptied all at once. 260051078Speter */ 260151078Speter com->iptr = com->ibuf = ibuf; 260251078Speter com->ibufend = ibuf + ibufsize; 260351078Speter com->ierroff = ibufsize; 260451078Speter com->ihighwater = ibuf + 3 * ibufsize / 4; 260551078Speter return (0); 260651078Speter} 260751078Speter 260851078Speterstatic void 260951078Spetercomstart(tp) 261051078Speter struct tty *tp; 261151078Speter{ 261251078Speter struct com_s *com; 261351078Speter int s; 261451078Speter int unit; 261565557Sjasone int intrsave; 261651078Speter 261751078Speter unit = DEV_TO_UNIT(tp->t_dev); 261851078Speter com = com_addr(unit); 261957915Simp if (com == NULL) 262057915Simp return; 262151078Speter s = spltty(); 262265557Sjasone intrsave = save_intr(); 262351078Speter disable_intr(); 262465557Sjasone COM_LOCK(); 262551078Speter if (tp->t_state & TS_TTSTOP) 262651078Speter com->state &= ~CS_TTGO; 262751078Speter else 262851078Speter com->state |= CS_TTGO; 262951078Speter if (tp->t_state & TS_TBLOCK) { 263051078Speter if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW) 263151078Speter outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); 263251078Speter } else { 263351078Speter if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater 263451078Speter && com->state & CS_RTS_IFLOW) 263551078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 263651078Speter } 263765557Sjasone COM_UNLOCK(); 263865557Sjasone restore_intr(intrsave); 263951078Speter if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { 264051078Speter ttwwakeup(tp); 264151078Speter splx(s); 264251078Speter return; 264351078Speter } 264451078Speter if (tp->t_outq.c_cc != 0) { 264551078Speter struct lbq *qp; 264651078Speter struct lbq *next; 264751078Speter 264851078Speter if (!com->obufs[0].l_queued) { 264951078Speter com->obufs[0].l_tail 265051078Speter = com->obuf1 + q_to_b(&tp->t_outq, com->obuf1, 265151078Speter sizeof com->obuf1); 265251078Speter com->obufs[0].l_next = NULL; 265351078Speter com->obufs[0].l_queued = TRUE; 265465557Sjasone intrsave = save_intr(); 265551078Speter disable_intr(); 265665557Sjasone COM_LOCK(); 265751078Speter if (com->state & CS_BUSY) { 265851078Speter qp = com->obufq.l_next; 265951078Speter while ((next = qp->l_next) != NULL) 266051078Speter qp = next; 266151078Speter qp->l_next = &com->obufs[0]; 266251078Speter } else { 266351078Speter com->obufq.l_head = com->obufs[0].l_head; 266451078Speter com->obufq.l_tail = com->obufs[0].l_tail; 266551078Speter com->obufq.l_next = &com->obufs[0]; 266651078Speter com->state |= CS_BUSY; 266751078Speter } 266865557Sjasone COM_UNLOCK(); 266965557Sjasone restore_intr(intrsave); 267051078Speter } 267151078Speter if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) { 267251078Speter com->obufs[1].l_tail 267351078Speter = com->obuf2 + q_to_b(&tp->t_outq, com->obuf2, 267451078Speter sizeof com->obuf2); 267551078Speter com->obufs[1].l_next = NULL; 267651078Speter com->obufs[1].l_queued = TRUE; 267765557Sjasone intrsave = save_intr(); 267851078Speter disable_intr(); 267965557Sjasone COM_LOCK(); 268051078Speter if (com->state & CS_BUSY) { 268151078Speter qp = com->obufq.l_next; 268251078Speter while ((next = qp->l_next) != NULL) 268351078Speter qp = next; 268451078Speter qp->l_next = &com->obufs[1]; 268551078Speter } else { 268651078Speter com->obufq.l_head = com->obufs[1].l_head; 268751078Speter com->obufq.l_tail = com->obufs[1].l_tail; 268851078Speter com->obufq.l_next = &com->obufs[1]; 268951078Speter com->state |= CS_BUSY; 269051078Speter } 269165557Sjasone COM_UNLOCK(); 269265557Sjasone restore_intr(intrsave); 269351078Speter } 269451078Speter tp->t_state |= TS_BUSY; 269551078Speter } 269665557Sjasone intrsave = save_intr(); 269751078Speter disable_intr(); 269865557Sjasone COM_LOCK(); 269951078Speter if (com->state >= (CS_BUSY | CS_TTGO)) 270051078Speter siointr1(com); /* fake interrupt to start output */ 270165557Sjasone COM_UNLOCK(); 270265557Sjasone restore_intr(intrsave); 270351078Speter ttwwakeup(tp); 270451078Speter splx(s); 270551078Speter} 270651078Speter 270751078Speterstatic void 270851654Sphkcomstop(tp, rw) 270951078Speter struct tty *tp; 271051078Speter int rw; 271151078Speter{ 271251078Speter struct com_s *com; 271365557Sjasone int intrsave; 271451078Speter 271551078Speter com = com_addr(DEV_TO_UNIT(tp->t_dev)); 271657915Simp if (com == NULL || com->gone) 271751078Speter return; 271865557Sjasone intrsave = save_intr(); 271951078Speter disable_intr(); 272065557Sjasone COM_LOCK(); 272151078Speter if (rw & FWRITE) { 272251078Speter if (com->hasfifo) 272351078Speter#ifdef COM_ESP 272451078Speter /* XXX avoid h/w bug. */ 272551078Speter if (!com->esp) 272651078Speter#endif 272760471Snyan sio_setreg(com, com_fifo, 272860471Snyan FIFO_XMT_RST | com->fifo_image); 272951078Speter com->obufs[0].l_queued = FALSE; 273051078Speter com->obufs[1].l_queued = FALSE; 273151078Speter if (com->state & CS_ODONE) 273251078Speter com_events -= LOTS_OF_EVENTS; 273351078Speter com->state &= ~(CS_ODONE | CS_BUSY); 273451078Speter com->tp->t_state &= ~TS_BUSY; 273551078Speter } 273651078Speter if (rw & FREAD) { 273751078Speter if (com->hasfifo) 273851078Speter#ifdef COM_ESP 273951078Speter /* XXX avoid h/w bug. */ 274051078Speter if (!com->esp) 274151078Speter#endif 274260471Snyan sio_setreg(com, com_fifo, 274360471Snyan FIFO_RCV_RST | com->fifo_image); 274451078Speter com_events -= (com->iptr - com->ibuf); 274551078Speter com->iptr = com->ibuf; 274651078Speter } 274765557Sjasone COM_UNLOCK(); 274865557Sjasone restore_intr(intrsave); 274951078Speter comstart(tp); 275051078Speter} 275151078Speter 275251078Speterstatic int 275351078Spetercommctl(com, bits, how) 275451078Speter struct com_s *com; 275551078Speter int bits; 275651078Speter int how; 275751078Speter{ 275851078Speter int mcr; 275951078Speter int msr; 276065557Sjasone int intrsave; 276151078Speter 276251078Speter if (how == DMGET) { 276351078Speter bits = TIOCM_LE; /* XXX - always enabled while open */ 276451078Speter mcr = com->mcr_image; 276551078Speter if (mcr & MCR_DTR) 276651078Speter bits |= TIOCM_DTR; 276751078Speter if (mcr & MCR_RTS) 276851078Speter bits |= TIOCM_RTS; 276951078Speter msr = com->prev_modem_status; 277051078Speter if (msr & MSR_CTS) 277151078Speter bits |= TIOCM_CTS; 277251078Speter if (msr & MSR_DCD) 277351078Speter bits |= TIOCM_CD; 277451078Speter if (msr & MSR_DSR) 277551078Speter bits |= TIOCM_DSR; 277651078Speter /* 277751078Speter * XXX - MSR_RI is naturally volatile, and we make MSR_TERI 277851078Speter * more volatile by reading the modem status a lot. Perhaps 277951078Speter * we should latch both bits until the status is read here. 278051078Speter */ 278151078Speter if (msr & (MSR_RI | MSR_TERI)) 278251078Speter bits |= TIOCM_RI; 278351078Speter return (bits); 278451078Speter } 278551078Speter mcr = 0; 278651078Speter if (bits & TIOCM_DTR) 278751078Speter mcr |= MCR_DTR; 278851078Speter if (bits & TIOCM_RTS) 278951078Speter mcr |= MCR_RTS; 279051078Speter if (com->gone) 279151078Speter return(0); 279265557Sjasone intrsave = save_intr(); 279351078Speter disable_intr(); 279465557Sjasone COM_LOCK(); 279551078Speter switch (how) { 279651078Speter case DMSET: 279751078Speter outb(com->modem_ctl_port, 279851078Speter com->mcr_image = mcr | (com->mcr_image & MCR_IENABLE)); 279951078Speter break; 280051078Speter case DMBIS: 280151078Speter outb(com->modem_ctl_port, com->mcr_image |= mcr); 280251078Speter break; 280351078Speter case DMBIC: 280451078Speter outb(com->modem_ctl_port, com->mcr_image &= ~mcr); 280551078Speter break; 280651078Speter } 280765557Sjasone COM_UNLOCK(); 280865557Sjasone restore_intr(intrsave); 280951078Speter return (0); 281051078Speter} 281151078Speter 281251078Speterstatic void 281351078Spetersiosettimeout() 281451078Speter{ 281551078Speter struct com_s *com; 281651078Speter bool_t someopen; 281751078Speter int unit; 281851078Speter 281951078Speter /* 282051078Speter * Set our timeout period to 1 second if no polled devices are open. 282151078Speter * Otherwise set it to max(1/200, 1/hz). 282251078Speter * Enable timeouts iff some device is open. 282351078Speter */ 282451078Speter untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 282551078Speter sio_timeout = hz; 282651078Speter someopen = FALSE; 282753344Speter for (unit = 0; unit < sio_numunits; ++unit) { 282851078Speter com = com_addr(unit); 282951078Speter if (com != NULL && com->tp != NULL 283051078Speter && com->tp->t_state & TS_ISOPEN && !com->gone) { 283151078Speter someopen = TRUE; 283251078Speter if (com->poll || com->poll_output) { 283351078Speter sio_timeout = hz > 200 ? hz / 200 : 1; 283451078Speter break; 283551078Speter } 283651078Speter } 283751078Speter } 283851078Speter if (someopen) { 283951078Speter sio_timeouts_until_log = hz / sio_timeout; 284051078Speter sio_timeout_handle = timeout(comwakeup, (void *)NULL, 284151078Speter sio_timeout); 284251078Speter } else { 284351078Speter /* Flush error messages, if any. */ 284451078Speter sio_timeouts_until_log = 1; 284551078Speter comwakeup((void *)NULL); 284651078Speter untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 284751078Speter } 284851078Speter} 284951078Speter 285051078Speterstatic void 285151078Spetercomwakeup(chan) 285251078Speter void *chan; 285351078Speter{ 285451078Speter struct com_s *com; 285551078Speter int unit; 285665557Sjasone int intrsave; 285751078Speter 285851078Speter sio_timeout_handle = timeout(comwakeup, (void *)NULL, sio_timeout); 285951078Speter 286051078Speter /* 286151078Speter * Recover from lost output interrupts. 286251078Speter * Poll any lines that don't use interrupts. 286351078Speter */ 286453344Speter for (unit = 0; unit < sio_numunits; ++unit) { 286551078Speter com = com_addr(unit); 286651078Speter if (com != NULL && !com->gone 286751078Speter && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) { 286865557Sjasone intrsave = save_intr(); 286951078Speter disable_intr(); 287065557Sjasone COM_LOCK(); 287151078Speter siointr1(com); 287265557Sjasone COM_UNLOCK(); 287365557Sjasone restore_intr(intrsave); 287451078Speter } 287551078Speter } 287651078Speter 287751078Speter /* 287851078Speter * Check for and log errors, but not too often. 287951078Speter */ 288051078Speter if (--sio_timeouts_until_log > 0) 288151078Speter return; 288251078Speter sio_timeouts_until_log = hz / sio_timeout; 288353344Speter for (unit = 0; unit < sio_numunits; ++unit) { 288451078Speter int errnum; 288551078Speter 288651078Speter com = com_addr(unit); 288751078Speter if (com == NULL) 288851078Speter continue; 288951078Speter if (com->gone) 289051078Speter continue; 289151078Speter for (errnum = 0; errnum < CE_NTYPES; ++errnum) { 289251078Speter u_int delta; 289351078Speter u_long total; 289451078Speter 289565557Sjasone intrsave = save_intr(); 289651078Speter disable_intr(); 289765557Sjasone COM_LOCK(); 289851078Speter delta = com->delta_error_counts[errnum]; 289951078Speter com->delta_error_counts[errnum] = 0; 290065557Sjasone COM_UNLOCK(); 290165557Sjasone restore_intr(intrsave); 290251078Speter if (delta == 0) 290351078Speter continue; 290451078Speter total = com->error_counts[errnum] += delta; 290551078Speter log(LOG_ERR, "sio%d: %u more %s%s (total %lu)\n", 290651078Speter unit, delta, error_desc[errnum], 290751078Speter delta == 1 ? "" : "s", total); 290851078Speter } 290951078Speter } 291051078Speter} 291151078Speter 291251078Speterstatic void 291351078Speterdisc_optim(tp, t, com) 291451078Speter struct tty *tp; 291551078Speter struct termios *t; 291651078Speter struct com_s *com; 291751078Speter{ 291851078Speter if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON)) 291951078Speter && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK)) 292051078Speter && (!(t->c_iflag & PARMRK) 292151078Speter || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK)) 292251078Speter && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN)) 292351078Speter && linesw[tp->t_line].l_rint == ttyinput) 292451078Speter tp->t_state |= TS_CAN_BYPASS_L_RINT; 292551078Speter else 292651078Speter tp->t_state &= ~TS_CAN_BYPASS_L_RINT; 292751078Speter com->hotchar = linesw[tp->t_line].l_hotchar; 292851078Speter} 292951078Speter 293051078Speter/* 293151078Speter * Following are all routines needed for SIO to act as console 293251078Speter */ 293351078Speter#include <sys/cons.h> 293451078Speter 293551078Speterstruct siocnstate { 293651078Speter u_char dlbl; 293751078Speter u_char dlbh; 293851078Speter u_char ier; 293951078Speter u_char cfcr; 294051078Speter u_char mcr; 294151078Speter}; 294251078Speter 294366230Sjhb#ifndef __alpha__ 294451078Speterstatic speed_t siocngetspeed __P((Port_t, struct speedtab *)); 294566230Sjhb#endif 294651078Speterstatic void siocnclose __P((struct siocnstate *sp, Port_t iobase)); 294751078Speterstatic void siocnopen __P((struct siocnstate *sp, Port_t iobase, int speed)); 294851078Speterstatic void siocntxwait __P((Port_t iobase)); 294951078Speter 295066230Sjhb#ifdef __alpha__ 295166230Sjhbint siocnattach __P((int port, int speed)); 295266230Sjhbint siogdbattach __P((int port, int speed)); 295366230Sjhbint siogdbgetc __P((void)); 295466230Sjhbvoid siogdbputc __P((int c)); 295566230Sjhb#else 295651078Speterstatic cn_probe_t siocnprobe; 295751078Speterstatic cn_init_t siocninit; 295866230Sjhb#endif 295951078Speterstatic cn_checkc_t siocncheckc; 296051078Speterstatic cn_getc_t siocngetc; 296151078Speterstatic cn_putc_t siocnputc; 296251078Speter 296351078Speter#ifdef __i386__ 296455823SyokotaCONS_DRIVER(sio, siocnprobe, siocninit, NULL, siocngetc, siocncheckc, 296555823Syokota siocnputc, NULL); 296651078Speter#endif 296751078Speter 296851078Speter/* To get the GDB related variables */ 296951078Speter#if DDB > 0 297051078Speter#include <ddb/ddb.h> 297151078Speter#endif 297251078Speter 297351078Speterstatic void 297451078Spetersiocntxwait(iobase) 297551078Speter Port_t iobase; 297651078Speter{ 297751078Speter int timo; 297851078Speter 297951078Speter /* 298051078Speter * Wait for any pending transmission to finish. Required to avoid 298151078Speter * the UART lockup bug when the speed is changed, and for normal 298251078Speter * transmits. 298351078Speter */ 298451078Speter timo = 100000; 298551078Speter while ((inb(iobase + com_lsr) & (LSR_TSRE | LSR_TXRDY)) 298651078Speter != (LSR_TSRE | LSR_TXRDY) && --timo != 0) 298751078Speter ; 298851078Speter} 298951078Speter 299066230Sjhb#ifndef __alpha__ 299166230Sjhb 299251078Speter/* 299351078Speter * Read the serial port specified and try to figure out what speed 299451078Speter * it's currently running at. We're assuming the serial port has 299551078Speter * been initialized and is basicly idle. This routine is only intended 299651078Speter * to be run at system startup. 299751078Speter * 299851078Speter * If the value read from the serial port doesn't make sense, return 0. 299951078Speter */ 300051078Speter 300151078Speterstatic speed_t 300251078Spetersiocngetspeed(iobase, table) 300351078Speter Port_t iobase; 300451078Speter struct speedtab *table; 300551078Speter{ 300651078Speter int code; 300751078Speter u_char dlbh; 300851078Speter u_char dlbl; 300951078Speter u_char cfcr; 301051078Speter 301151078Speter cfcr = inb(iobase + com_cfcr); 301251078Speter outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 301351078Speter 301451078Speter dlbl = inb(iobase + com_dlbl); 301551078Speter dlbh = inb(iobase + com_dlbh); 301651078Speter 301751078Speter outb(iobase + com_cfcr, cfcr); 301851078Speter 301951078Speter code = dlbh << 8 | dlbl; 302051078Speter 302153344Speter for (; table->sp_speed != -1; table++) 302251078Speter if (table->sp_code == code) 302351078Speter return (table->sp_speed); 302451078Speter 302558885Simp return (0); /* didn't match anything sane */ 302651078Speter} 302751078Speter 302866230Sjhb#endif 302966230Sjhb 303051078Speterstatic void 303151078Spetersiocnopen(sp, iobase, speed) 303251078Speter struct siocnstate *sp; 303351078Speter Port_t iobase; 303451078Speter int speed; 303551078Speter{ 303651078Speter int divisor; 303751078Speter u_char dlbh; 303851078Speter u_char dlbl; 303951078Speter 304051078Speter /* 304151078Speter * Save all the device control registers except the fifo register 304251078Speter * and set our default ones (cs8 -parenb speed=comdefaultrate). 304351078Speter * We can't save the fifo register since it is read-only. 304451078Speter */ 304551078Speter sp->ier = inb(iobase + com_ier); 304651078Speter outb(iobase + com_ier, 0); /* spltty() doesn't stop siointr() */ 304751078Speter siocntxwait(iobase); 304851078Speter sp->cfcr = inb(iobase + com_cfcr); 304951078Speter outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 305051078Speter sp->dlbl = inb(iobase + com_dlbl); 305151078Speter sp->dlbh = inb(iobase + com_dlbh); 305251078Speter /* 305351078Speter * Only set the divisor registers if they would change, since on 305451078Speter * some 16550 incompatibles (Startech), setting them clears the 305551078Speter * data input register. This also reduces the effects of the 305651078Speter * UMC8669F bug. 305751078Speter */ 305851078Speter divisor = ttspeedtab(speed, comspeedtab); 305951078Speter dlbl = divisor & 0xFF; 306051078Speter if (sp->dlbl != dlbl) 306151078Speter outb(iobase + com_dlbl, dlbl); 306251078Speter dlbh = (u_int) divisor >> 8; 306351078Speter if (sp->dlbh != dlbh) 306451078Speter outb(iobase + com_dlbh, dlbh); 306551078Speter outb(iobase + com_cfcr, CFCR_8BITS); 306651078Speter sp->mcr = inb(iobase + com_mcr); 306751078Speter /* 306851078Speter * We don't want interrupts, but must be careful not to "disable" 306951078Speter * them by clearing the MCR_IENABLE bit, since that might cause 307051078Speter * an interrupt by floating the IRQ line. 307151078Speter */ 307251078Speter outb(iobase + com_mcr, (sp->mcr & MCR_IENABLE) | MCR_DTR | MCR_RTS); 307351078Speter} 307451078Speter 307551078Speterstatic void 307651078Spetersiocnclose(sp, iobase) 307751078Speter struct siocnstate *sp; 307851078Speter Port_t iobase; 307951078Speter{ 308051078Speter /* 308151078Speter * Restore the device control registers. 308251078Speter */ 308351078Speter siocntxwait(iobase); 308451078Speter outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 308551078Speter if (sp->dlbl != inb(iobase + com_dlbl)) 308651078Speter outb(iobase + com_dlbl, sp->dlbl); 308751078Speter if (sp->dlbh != inb(iobase + com_dlbh)) 308851078Speter outb(iobase + com_dlbh, sp->dlbh); 308951078Speter outb(iobase + com_cfcr, sp->cfcr); 309051078Speter /* 309151078Speter * XXX damp oscillations of MCR_DTR and MCR_RTS by not restoring them. 309251078Speter */ 309351078Speter outb(iobase + com_mcr, sp->mcr | MCR_DTR | MCR_RTS); 309451078Speter outb(iobase + com_ier, sp->ier); 309551078Speter} 309651078Speter 309766230Sjhb#ifndef __alpha__ 309866230Sjhb 309951078Speterstatic void 310051078Spetersiocnprobe(cp) 310151078Speter struct consdev *cp; 310251078Speter{ 310351078Speter speed_t boot_speed; 310451078Speter u_char cfcr; 310551078Speter int s, unit; 310651078Speter struct siocnstate sp; 310751078Speter 310851078Speter /* 310951078Speter * Find our first enabled console, if any. If it is a high-level 311051078Speter * console device, then initialize it and return successfully. 311151078Speter * If it is a low-level console device, then initialize it and 311251078Speter * return unsuccessfully. It must be initialized in both cases 311351078Speter * for early use by console drivers and debuggers. Initializing 311451078Speter * the hardware is not necessary in all cases, since the i/o 311551078Speter * routines initialize it on the fly, but it is necessary if 311651078Speter * input might arrive while the hardware is switched back to an 311751078Speter * uninitialized state. We can't handle multiple console devices 311851078Speter * yet because our low-level routines don't take a device arg. 311951078Speter * We trust the user to set the console flags properly so that we 312051078Speter * don't need to probe. 312151078Speter */ 312251078Speter cp->cn_pri = CN_DEAD; 312351078Speter 312451078Speter for (unit = 0; unit < 16; unit++) { /* XXX need to know how many */ 312551078Speter int flags; 312651078Speter int disabled; 312751078Speter if (resource_int_value("sio", unit, "disabled", &disabled) == 0) { 312851078Speter if (disabled) 312951078Speter continue; 313051078Speter } 313151078Speter if (resource_int_value("sio", unit, "flags", &flags)) 313251078Speter continue; 313351078Speter if (COM_CONSOLE(flags) || COM_DEBUGGER(flags)) { 313451078Speter int port; 313551078Speter Port_t iobase; 313651078Speter 313751078Speter if (resource_int_value("sio", unit, "port", &port)) 313851078Speter continue; 313951078Speter iobase = port; 314051078Speter s = spltty(); 314151078Speter if (boothowto & RB_SERIAL) { 314251078Speter boot_speed = siocngetspeed(iobase, comspeedtab); 314351078Speter if (boot_speed) 314451078Speter comdefaultrate = boot_speed; 314551078Speter } 314651078Speter 314751078Speter /* 314851078Speter * Initialize the divisor latch. We can't rely on 314951078Speter * siocnopen() to do this the first time, since it 315051078Speter * avoids writing to the latch if the latch appears 315151078Speter * to have the correct value. Also, if we didn't 315251078Speter * just read the speed from the hardware, then we 315351078Speter * need to set the speed in hardware so that 315451078Speter * switching it later is null. 315551078Speter */ 315651078Speter cfcr = inb(iobase + com_cfcr); 315751078Speter outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 315851078Speter outb(iobase + com_dlbl, 315951078Speter COMBRD(comdefaultrate) & 0xff); 316051078Speter outb(iobase + com_dlbh, 316151078Speter (u_int) COMBRD(comdefaultrate) >> 8); 316251078Speter outb(iobase + com_cfcr, cfcr); 316351078Speter 316451078Speter siocnopen(&sp, iobase, comdefaultrate); 316551078Speter 316651078Speter splx(s); 316751078Speter if (COM_CONSOLE(flags) && !COM_LLCONSOLE(flags)) { 316851078Speter cp->cn_dev = makedev(CDEV_MAJOR, unit); 316951078Speter cp->cn_pri = COM_FORCECONSOLE(flags) 317051078Speter || boothowto & RB_SERIAL 317151078Speter ? CN_REMOTE : CN_NORMAL; 317251078Speter siocniobase = iobase; 317351078Speter siocnunit = unit; 317451078Speter } 317551078Speter if (COM_DEBUGGER(flags)) { 317651078Speter printf("sio%d: gdb debugging port\n", unit); 317751078Speter siogdbiobase = iobase; 317851078Speter siogdbunit = unit; 317951078Speter#if DDB > 0 318051078Speter gdbdev = makedev(CDEV_MAJOR, unit); 318151078Speter gdb_getc = siocngetc; 318251078Speter gdb_putc = siocnputc; 318351078Speter#endif 318451078Speter } 318551078Speter } 318651078Speter } 318751078Speter#ifdef __i386__ 318851078Speter#if DDB > 0 318951078Speter /* 319051078Speter * XXX Ugly Compatability. 319151078Speter * If no gdb port has been specified, set it to be the console 319251078Speter * as some configuration files don't specify the gdb port. 319351078Speter */ 319451078Speter if (gdbdev == NODEV && (boothowto & RB_GDB)) { 319551078Speter printf("Warning: no GDB port specified. Defaulting to sio%d.\n", 319651078Speter siocnunit); 319751078Speter printf("Set flag 0x80 on desired GDB port in your\n"); 319851078Speter printf("configuration file (currently sio only).\n"); 319951078Speter siogdbiobase = siocniobase; 320051078Speter siogdbunit = siocnunit; 320151078Speter gdbdev = makedev(CDEV_MAJOR, siocnunit); 320251078Speter gdb_getc = siocngetc; 320351078Speter gdb_putc = siocnputc; 320451078Speter } 320551078Speter#endif 320651078Speter#endif 320751078Speter} 320851078Speter 320966230Sjhbstatic void 321066230Sjhbsiocninit(cp) 321166230Sjhb struct consdev *cp; 321266230Sjhb{ 321366230Sjhb comconsole = DEV_TO_UNIT(cp->cn_dev); 321466230Sjhb} 321566230Sjhb 321666230Sjhb#endif 321766230Sjhb 321851078Speter#ifdef __alpha__ 321951078Speter 322055868SgallatinCONS_DRIVER(sio, NULL, NULL, NULL, siocngetc, siocncheckc, siocnputc, NULL); 322151078Speter 322251078Speterint 322351078Spetersiocnattach(port, speed) 322451078Speter int port; 322551078Speter int speed; 322651078Speter{ 322751078Speter int s; 322851078Speter u_char cfcr; 322951078Speter struct siocnstate sp; 323051078Speter 323151078Speter siocniobase = port; 323251078Speter comdefaultrate = speed; 323351078Speter sio_consdev.cn_pri = CN_NORMAL; 323451078Speter sio_consdev.cn_dev = makedev(CDEV_MAJOR, 0); 323551078Speter 323651078Speter s = spltty(); 323751078Speter 323851078Speter /* 323951078Speter * Initialize the divisor latch. We can't rely on 324051078Speter * siocnopen() to do this the first time, since it 324151078Speter * avoids writing to the latch if the latch appears 324251078Speter * to have the correct value. Also, if we didn't 324351078Speter * just read the speed from the hardware, then we 324451078Speter * need to set the speed in hardware so that 324551078Speter * switching it later is null. 324651078Speter */ 324751078Speter cfcr = inb(siocniobase + com_cfcr); 324851078Speter outb(siocniobase + com_cfcr, CFCR_DLAB | cfcr); 324951078Speter outb(siocniobase + com_dlbl, 325051078Speter COMBRD(comdefaultrate) & 0xff); 325151078Speter outb(siocniobase + com_dlbh, 325251078Speter (u_int) COMBRD(comdefaultrate) >> 8); 325351078Speter outb(siocniobase + com_cfcr, cfcr); 325451078Speter 325551078Speter siocnopen(&sp, siocniobase, comdefaultrate); 325651078Speter splx(s); 325751078Speter 325851078Speter cn_tab = &sio_consdev; 325958885Simp return (0); 326051078Speter} 326151078Speter 326251078Speterint 326351078Spetersiogdbattach(port, speed) 326451078Speter int port; 326551078Speter int speed; 326651078Speter{ 326751078Speter int s; 326851078Speter u_char cfcr; 326951078Speter struct siocnstate sp; 327065714Sjhb int unit = 1; /* XXX !!! */ 327151078Speter 327251078Speter siogdbiobase = port; 327351078Speter gdbdefaultrate = speed; 327451078Speter 327565714Sjhb printf("sio%d: gdb debugging port\n", unit); 327665714Sjhb siogdbunit = unit; 327765714Sjhb#if DDB > 0 327865714Sjhb gdbdev = makedev(CDEV_MAJOR, unit); 327965714Sjhb gdb_getc = siocngetc; 328065714Sjhb gdb_putc = siocnputc; 328165714Sjhb#endif 328265714Sjhb 328351078Speter s = spltty(); 328451078Speter 328551078Speter /* 328651078Speter * Initialize the divisor latch. We can't rely on 328751078Speter * siocnopen() to do this the first time, since it 328851078Speter * avoids writing to the latch if the latch appears 328951078Speter * to have the correct value. Also, if we didn't 329051078Speter * just read the speed from the hardware, then we 329151078Speter * need to set the speed in hardware so that 329251078Speter * switching it later is null. 329351078Speter */ 329451078Speter cfcr = inb(siogdbiobase + com_cfcr); 329551078Speter outb(siogdbiobase + com_cfcr, CFCR_DLAB | cfcr); 329651078Speter outb(siogdbiobase + com_dlbl, 329751078Speter COMBRD(gdbdefaultrate) & 0xff); 329851078Speter outb(siogdbiobase + com_dlbh, 329951078Speter (u_int) COMBRD(gdbdefaultrate) >> 8); 330051078Speter outb(siogdbiobase + com_cfcr, cfcr); 330151078Speter 330251078Speter siocnopen(&sp, siogdbiobase, gdbdefaultrate); 330351078Speter splx(s); 330451078Speter 330558885Simp return (0); 330651078Speter} 330751078Speter 330851078Speter#endif 330951078Speter 331051078Speterstatic int 331151078Spetersiocncheckc(dev) 331251078Speter dev_t dev; 331351078Speter{ 331451078Speter int c; 331551078Speter Port_t iobase; 331651078Speter int s; 331751078Speter struct siocnstate sp; 331851078Speter 331951078Speter if (minor(dev) == siogdbunit) 332051078Speter iobase = siogdbiobase; 332151078Speter else 332251078Speter iobase = siocniobase; 332351078Speter s = spltty(); 332451078Speter siocnopen(&sp, iobase, comdefaultrate); 332551078Speter if (inb(iobase + com_lsr) & LSR_RXRDY) 332651078Speter c = inb(iobase + com_data); 332751078Speter else 332851078Speter c = -1; 332951078Speter siocnclose(&sp, iobase); 333051078Speter splx(s); 333151078Speter return (c); 333251078Speter} 333351078Speter 333451078Speter 333551078Speterint 333651078Spetersiocngetc(dev) 333751078Speter dev_t dev; 333851078Speter{ 333951078Speter int c; 334051078Speter Port_t iobase; 334151078Speter int s; 334251078Speter struct siocnstate sp; 334351078Speter 334451078Speter if (minor(dev) == siogdbunit) 334551078Speter iobase = siogdbiobase; 334651078Speter else 334751078Speter iobase = siocniobase; 334851078Speter s = spltty(); 334951078Speter siocnopen(&sp, iobase, comdefaultrate); 335051078Speter while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 335151078Speter ; 335251078Speter c = inb(iobase + com_data); 335351078Speter siocnclose(&sp, iobase); 335451078Speter splx(s); 335551078Speter return (c); 335651078Speter} 335751078Speter 335851078Spetervoid 335951078Spetersiocnputc(dev, c) 336051078Speter dev_t dev; 336151078Speter int c; 336251078Speter{ 336351078Speter int s; 336451078Speter struct siocnstate sp; 336551078Speter Port_t iobase; 336651078Speter 336751078Speter if (minor(dev) == siogdbunit) 336851078Speter iobase = siogdbiobase; 336951078Speter else 337051078Speter iobase = siocniobase; 337151078Speter s = spltty(); 337251078Speter siocnopen(&sp, iobase, comdefaultrate); 337351078Speter siocntxwait(iobase); 337451078Speter outb(iobase + com_data, c); 337551078Speter siocnclose(&sp, iobase); 337651078Speter splx(s); 337751078Speter} 337851078Speter 337951078Speter#ifdef __alpha__ 338051078Speterint 338151078Spetersiogdbgetc() 338251078Speter{ 338351078Speter int c; 338451078Speter Port_t iobase; 338551078Speter int s; 338651078Speter struct siocnstate sp; 338751078Speter 338851078Speter iobase = siogdbiobase; 338951078Speter s = spltty(); 339051078Speter siocnopen(&sp, iobase, gdbdefaultrate); 339151078Speter while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 339251078Speter ; 339351078Speter c = inb(iobase + com_data); 339451078Speter siocnclose(&sp, iobase); 339551078Speter splx(s); 339651078Speter return (c); 339751078Speter} 339851078Speter 339951078Spetervoid 340051078Spetersiogdbputc(c) 340151078Speter int c; 340251078Speter{ 340351078Speter int s; 340451078Speter struct siocnstate sp; 340551078Speter 340651078Speter s = spltty(); 340751078Speter siocnopen(&sp, siogdbiobase, gdbdefaultrate); 340851078Speter siocntxwait(siogdbiobase); 340951078Speter outb(siogdbiobase + com_data, c); 341051078Speter siocnclose(&sp, siogdbiobase); 341151078Speter splx(s); 341251078Speter} 341351078Speter#endif 341451078Speter 341552471SimpDRIVER_MODULE(sio, isa, sio_isa_driver, sio_devclass, 0, 0); 341652471Simp#if NCARD > 0 341752471SimpDRIVER_MODULE(sio, pccard, sio_pccard_driver, sio_devclass, 0, 0); 341852471Simp#endif 341958885Simp#if NPCI > 0 342058885SimpDRIVER_MODULE(sio, pci, sio_pci_driver, sio_devclass, 0, 0); 342158885Simp#endif 3422