sio.c revision 82682
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 82682 2001-08-31 20:16:00Z murray $ 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 4551078Speter/* 4651078Speter * Serial driver, based on 386BSD-0.1 com driver. 4751078Speter * Mostly rewritten to use pseudo-DMA. 4851078Speter * Works for National Semiconductor NS8250-NS16550AF UARTs. 4951078Speter * COM driver, based on HP dca driver. 5051078Speter * 5151078Speter * Changes for PC-Card integration: 5251078Speter * - Added PC-Card driver table and handlers 5351078Speter */ 5451078Speter#include <sys/param.h> 5576166Smarkm#include <sys/systm.h> 5665822Sjhb#include <sys/bus.h> 5776166Smarkm#include <sys/bus.h> 5851078Speter#include <sys/conf.h> 5951078Speter#include <sys/dkstat.h> 6051078Speter#include <sys/fcntl.h> 6151078Speter#include <sys/interrupt.h> 6251078Speter#include <sys/kernel.h> 6376166Smarkm#include <sys/lock.h> 6476166Smarkm#include <sys/malloc.h> 6576166Smarkm#include <sys/module.h> 6676166Smarkm#include <sys/mutex.h> 6776166Smarkm#include <sys/proc.h> 6876166Smarkm#include <sys/reboot.h> 6976166Smarkm#include <sys/sysctl.h> 7051078Speter#include <sys/syslog.h> 7176166Smarkm#include <sys/tty.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 8551078Speter#include <machine/clock.h> 8651078Speter#include <machine/resource.h> 8751078Speter 8851078Speter#include <isa/sioreg.h> 8951078Speter 9051078Speter#ifdef COM_ESP 9177726Sjoerg#include <dev/ic/esp.h> 9251078Speter#endif 9377726Sjoerg#include <dev/ic/ns16550.h> 9451078Speter 9551078Speter#define LOTS_OF_EVENTS 64 /* helps separate urgent events from input */ 9651078Speter 9751078Speter#define CALLOUT_MASK 0x80 9851078Speter#define CONTROL_MASK 0x60 9951078Speter#define CONTROL_INIT_STATE 0x20 10051078Speter#define CONTROL_LOCK_STATE 0x40 10151078Speter#define DEV_TO_UNIT(dev) (MINOR_TO_UNIT(minor(dev))) 10251078Speter#define MINOR_MAGIC_MASK (CALLOUT_MASK | CONTROL_MASK) 10351078Speter#define MINOR_TO_UNIT(mynor) ((mynor) & ~MINOR_MAGIC_MASK) 10451078Speter 10551078Speter#ifdef COM_MULTIPORT 10651078Speter/* checks in flags for multiport and which is multiport "master chip" 10751078Speter * for a given card 10851078Speter */ 10951078Speter#define COM_ISMULTIPORT(flags) ((flags) & 0x01) 11051078Speter#define COM_MPMASTER(flags) (((flags) >> 8) & 0x0ff) 11151078Speter#define COM_NOTAST4(flags) ((flags) & 0x04) 11251078Speter#endif /* COM_MULTIPORT */ 11351078Speter 11451078Speter#define COM_CONSOLE(flags) ((flags) & 0x10) 11551078Speter#define COM_FORCECONSOLE(flags) ((flags) & 0x20) 11651078Speter#define COM_LLCONSOLE(flags) ((flags) & 0x40) 11751078Speter#define COM_DEBUGGER(flags) ((flags) & 0x80) 11851078Speter#define COM_LOSESOUTINTS(flags) ((flags) & 0x08) 11951078Speter#define COM_NOFIFO(flags) ((flags) & 0x02) 12051078Speter#define COM_ST16650A(flags) ((flags) & 0x20000) 12151078Speter#define COM_C_NOPROBE (0x40000) 12251078Speter#define COM_NOPROBE(flags) ((flags) & COM_C_NOPROBE) 12351078Speter#define COM_C_IIR_TXRDYBUG (0x80000) 12451078Speter#define COM_IIR_TXRDYBUG(flags) ((flags) & COM_C_IIR_TXRDYBUG) 12551078Speter#define COM_FIFOSIZE(flags) (((flags) & 0xff000000) >> 24) 12651078Speter 12751078Speter#define com_scr 7 /* scratch register for 16450-16550 (R/W) */ 12851078Speter 12960471Snyan#define sio_getreg(com, off) \ 13060471Snyan (bus_space_read_1((com)->bst, (com)->bsh, (off))) 13160471Snyan#define sio_setreg(com, off, value) \ 13260471Snyan (bus_space_write_1((com)->bst, (com)->bsh, (off), (value))) 13360471Snyan 13451078Speter/* 13551078Speter * com state bits. 13651078Speter * (CS_BUSY | CS_TTGO) and (CS_BUSY | CS_TTGO | CS_ODEVREADY) must be higher 13751078Speter * than the other bits so that they can be tested as a group without masking 13851078Speter * off the low bits. 13951078Speter * 14051078Speter * The following com and tty flags correspond closely: 14151078Speter * CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and 14253344Speter * comstop()) 14351078Speter * CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart()) 14451078Speter * CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam()) 14551078Speter * CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam()) 14651078Speter * TS_FLUSH is not used. 14751078Speter * XXX I think TIOCSETA doesn't clear TS_TTSTOP when it clears IXON. 14851078Speter * XXX CS_*FLOW should be CF_*FLOW in com->flags (control flags not state). 14951078Speter */ 15051078Speter#define CS_BUSY 0x80 /* output in progress */ 15151078Speter#define CS_TTGO 0x40 /* output not stopped by XOFF */ 15251078Speter#define CS_ODEVREADY 0x20 /* external device h/w ready (CTS) */ 15351078Speter#define CS_CHECKMSR 1 /* check of MSR scheduled */ 15451078Speter#define CS_CTS_OFLOW 2 /* use CTS output flow control */ 15551078Speter#define CS_DTR_OFF 0x10 /* DTR held off */ 15651078Speter#define CS_ODONE 4 /* output completed */ 15751078Speter#define CS_RTS_IFLOW 8 /* use RTS input flow control */ 15851078Speter#define CSE_BUSYCHECK 1 /* siobusycheck() scheduled */ 15951078Speter 16051078Speterstatic char const * const error_desc[] = { 16151078Speter#define CE_OVERRUN 0 16251078Speter "silo overflow", 16351078Speter#define CE_INTERRUPT_BUF_OVERFLOW 1 16451078Speter "interrupt-level buffer overflow", 16551078Speter#define CE_TTY_BUF_OVERFLOW 2 16651078Speter "tty-level buffer overflow", 16751078Speter}; 16851078Speter 16951078Speter#define CE_NTYPES 3 17051078Speter#define CE_RECORD(com, errnum) (++(com)->delta_error_counts[errnum]) 17151078Speter 17251078Speter/* types. XXX - should be elsewhere */ 17351078Spetertypedef u_int Port_t; /* hardware port */ 17451078Spetertypedef u_char bool_t; /* boolean */ 17551078Speter 17651078Speter/* queue of linear buffers */ 17751078Speterstruct lbq { 17851078Speter u_char *l_head; /* next char to process */ 17951078Speter u_char *l_tail; /* one past the last char to process */ 18051078Speter struct lbq *l_next; /* next in queue */ 18151078Speter bool_t l_queued; /* nonzero if queued */ 18251078Speter}; 18351078Speter 18451078Speter/* com device structure */ 18551078Speterstruct com_s { 18651078Speter u_int flags; /* Copy isa device flags */ 18751078Speter u_char state; /* miscellaneous flag bits */ 18851078Speter bool_t active_out; /* nonzero if the callout device is open */ 18951078Speter u_char cfcr_image; /* copy of value written to CFCR */ 19051078Speter#ifdef COM_ESP 19151078Speter bool_t esp; /* is this unit a hayes esp board? */ 19251078Speter#endif 19351078Speter u_char extra_state; /* more flag bits, separate for order trick */ 19451078Speter u_char fifo_image; /* copy of value written to FIFO */ 19551078Speter bool_t hasfifo; /* nonzero for 16550 UARTs */ 19651078Speter bool_t st16650a; /* Is a Startech 16650A or RTS/CTS compat */ 19751078Speter bool_t loses_outints; /* nonzero if device loses output interrupts */ 19851078Speter u_char mcr_image; /* copy of value written to MCR */ 19951078Speter#ifdef COM_MULTIPORT 20051078Speter bool_t multiport; /* is this unit part of a multiport device? */ 20151078Speter#endif /* COM_MULTIPORT */ 20251078Speter bool_t no_irq; /* nonzero if irq is not attached */ 20351078Speter bool_t gone; /* hardware disappeared */ 20451078Speter bool_t poll; /* nonzero if polling is required */ 20551078Speter bool_t poll_output; /* nonzero if polling for output is required */ 20651078Speter int unit; /* unit number */ 20751078Speter int dtr_wait; /* time to hold DTR down on close (* 1/hz) */ 20851078Speter u_int tx_fifo_size; 20951078Speter u_int wopeners; /* # processes waiting for DCD in open() */ 21051078Speter 21151078Speter /* 21251078Speter * The high level of the driver never reads status registers directly 21351078Speter * because there would be too many side effects to handle conveniently. 21451078Speter * Instead, it reads copies of the registers stored here by the 21551078Speter * interrupt handler. 21651078Speter */ 21751078Speter u_char last_modem_status; /* last MSR read by intr handler */ 21851078Speter u_char prev_modem_status; /* last MSR handled by high level */ 21951078Speter 22051078Speter u_char hotchar; /* ldisc-specific char to be handled ASAP */ 22151078Speter u_char *ibuf; /* start of input buffer */ 22251078Speter u_char *ibufend; /* end of input buffer */ 22351078Speter u_char *ibufold; /* old input buffer, to be freed */ 22451078Speter u_char *ihighwater; /* threshold in input buffer */ 22551078Speter u_char *iptr; /* next free spot in input buffer */ 22651078Speter int ibufsize; /* size of ibuf (not include error bytes) */ 22751078Speter int ierroff; /* offset of error bytes in ibuf */ 22851078Speter 22951078Speter struct lbq obufq; /* head of queue of output buffers */ 23051078Speter struct lbq obufs[2]; /* output buffers */ 23151078Speter 23260471Snyan bus_space_tag_t bst; 23360471Snyan bus_space_handle_t bsh; 23460471Snyan 23551078Speter Port_t data_port; /* i/o ports */ 23651078Speter#ifdef COM_ESP 23751078Speter Port_t esp_port; 23851078Speter#endif 23951078Speter Port_t int_id_port; 24051078Speter Port_t modem_ctl_port; 24151078Speter Port_t line_status_port; 24251078Speter Port_t modem_status_port; 24351078Speter Port_t intr_ctl_port; /* Ports of IIR register */ 24451078Speter 24551078Speter struct tty *tp; /* cross reference */ 24651078Speter 24751078Speter /* Initial state. */ 24851078Speter struct termios it_in; /* should be in struct tty */ 24951078Speter struct termios it_out; 25051078Speter 25151078Speter /* Lock state. */ 25251078Speter struct termios lt_in; /* should be in struct tty */ 25351078Speter struct termios lt_out; 25451078Speter 25551078Speter bool_t do_timestamp; 25651078Speter bool_t do_dcd_timestamp; 25751078Speter struct timeval timestamp; 25851078Speter struct timeval dcd_timestamp; 25951078Speter struct pps_state pps; 26051078Speter 26151078Speter u_long bytes_in; /* statistics */ 26251078Speter u_long bytes_out; 26351078Speter u_int delta_error_counts[CE_NTYPES]; 26451078Speter u_long error_counts[CE_NTYPES]; 26551078Speter 26651078Speter struct resource *irqres; 26751078Speter struct resource *ioportres; 26854386Simp void *cookie; 26965131Sphk dev_t devs[6]; 27051078Speter 27151078Speter /* 27251078Speter * Data area for output buffers. Someday we should build the output 27351078Speter * buffer queue without copying data. 27451078Speter */ 27551078Speter u_char obuf1[256]; 27651078Speter u_char obuf2[256]; 27751078Speter}; 27851078Speter 27951078Speter#ifdef COM_ESP 28051078Speterstatic int espattach __P((struct com_s *com, Port_t esp_port)); 28151078Speter#endif 28258885Simpstatic int sioattach __P((device_t dev, int rid)); 28352471Simpstatic int sio_isa_attach __P((device_t dev)); 28451078Speter 28551078Speterstatic timeout_t siobusycheck; 28651078Speterstatic timeout_t siodtrwakeup; 28751078Speterstatic void comhardclose __P((struct com_s *com)); 28851078Speterstatic void sioinput __P((struct com_s *com)); 28951078Speterstatic void siointr1 __P((struct com_s *com)); 29051078Speterstatic void siointr __P((void *arg)); 29151078Speterstatic int commctl __P((struct com_s *com, int bits, int how)); 29251078Speterstatic int comparam __P((struct tty *tp, struct termios *t)); 29367551Sjhbstatic void siopoll __P((void *)); 29458885Simpstatic int sioprobe __P((device_t dev, int xrid)); 29552471Simpstatic int sio_isa_probe __P((device_t dev)); 29651078Speterstatic void siosettimeout __P((void)); 29765605Sjhbstatic int siosetwater __P((struct com_s *com, speed_t speed)); 29851078Speterstatic void comstart __P((struct tty *tp)); 29951654Sphkstatic void comstop __P((struct tty *tp, int rw)); 30051078Speterstatic timeout_t comwakeup; 30151078Speterstatic void disc_optim __P((struct tty *tp, struct termios *t, 30251078Speter struct com_s *com)); 30351078Speter 30452471Simp#if NCARD > 0 30552471Simpstatic int sio_pccard_attach __P((device_t dev)); 30654386Simpstatic int sio_pccard_detach __P((device_t dev)); 30752471Simpstatic int sio_pccard_probe __P((device_t dev)); 30852471Simp#endif /* NCARD > 0 */ 30951078Speter 31058885Simp#if NPCI > 0 31158885Simpstatic int sio_pci_attach __P((device_t dev)); 31258885Simpstatic void sio_pci_kludge_unit __P((device_t dev)); 31358885Simpstatic int sio_pci_probe __P((device_t dev)); 31458885Simp#endif /* NPCI > 0 */ 31558885Simp 31670174Sjhbstatic char driver_name[] = "sio"; 31770174Sjhbstatic struct mtx sio_lock; 31870174Sjhbstatic int sio_inited; 31951078Speter 32051078Speter/* table and macro for fast conversion from a unit number to its com struct */ 32151078Speterstatic devclass_t sio_devclass; 32251078Speter#define com_addr(unit) ((struct com_s *) \ 32351078Speter devclass_get_softc(sio_devclass, unit)) 32451078Speter 32552471Simpstatic device_method_t sio_isa_methods[] = { 32651078Speter /* Device interface */ 32752471Simp DEVMETHOD(device_probe, sio_isa_probe), 32852471Simp DEVMETHOD(device_attach, sio_isa_attach), 32951078Speter 33051078Speter { 0, 0 } 33151078Speter}; 33251078Speter 33352471Simpstatic driver_t sio_isa_driver = { 33451078Speter driver_name, 33552471Simp sio_isa_methods, 33651078Speter sizeof(struct com_s), 33751078Speter}; 33851078Speter 33952471Simp#if NCARD > 0 34052471Simpstatic device_method_t sio_pccard_methods[] = { 34152471Simp /* Device interface */ 34252471Simp DEVMETHOD(device_probe, sio_pccard_probe), 34352471Simp DEVMETHOD(device_attach, sio_pccard_attach), 34452471Simp DEVMETHOD(device_detach, sio_pccard_detach), 34552471Simp 34652471Simp { 0, 0 } 34752471Simp}; 34852471Simp 34952471Simpstatic driver_t sio_pccard_driver = { 35052471Simp driver_name, 35152471Simp sio_pccard_methods, 35252471Simp sizeof(struct com_s), 35352471Simp}; 35458885Simp#endif /* NCARD > 0 */ 35552471Simp 35658885Simp#if NPCI > 0 35758885Simpstatic device_method_t sio_pci_methods[] = { 35858885Simp /* Device interface */ 35958885Simp DEVMETHOD(device_probe, sio_pci_probe), 36058885Simp DEVMETHOD(device_attach, sio_pci_attach), 36158885Simp 36258885Simp { 0, 0 } 36358885Simp}; 36458885Simp 36558885Simpstatic driver_t sio_pci_driver = { 36658885Simp driver_name, 36758885Simp sio_pci_methods, 36858885Simp sizeof(struct com_s), 36958885Simp}; 37058885Simp#endif /* NPCI > 0 */ 37158885Simp 37251078Speterstatic d_open_t sioopen; 37351078Speterstatic d_close_t sioclose; 37451078Speterstatic d_read_t sioread; 37551078Speterstatic d_write_t siowrite; 37651078Speterstatic d_ioctl_t sioioctl; 37751078Speter 37851078Speter#define CDEV_MAJOR 28 37951078Speterstatic struct cdevsw sio_cdevsw = { 38051078Speter /* open */ sioopen, 38151078Speter /* close */ sioclose, 38251078Speter /* read */ sioread, 38351078Speter /* write */ siowrite, 38451078Speter /* ioctl */ sioioctl, 38551654Sphk /* poll */ ttypoll, 38651078Speter /* mmap */ nommap, 38751078Speter /* strategy */ nostrategy, 38851078Speter /* name */ driver_name, 38951078Speter /* maj */ CDEV_MAJOR, 39051078Speter /* dump */ nodump, 39151078Speter /* psize */ nopsize, 39272521Sjlemon /* flags */ D_TTY | D_KQFILTER, 39372521Sjlemon /* kqfilter */ ttykqfilter, 39451078Speter}; 39551078Speter 39651078Speterint comconsole = -1; 39751078Speterstatic volatile speed_t comdefaultrate = CONSPEED; 39851078Speter#ifdef __alpha__ 39951078Speterstatic volatile speed_t gdbdefaultrate = CONSPEED; 40051078Speter#endif 40151078Speterstatic u_int com_events; /* input chars + weighted output completions */ 40251078Speterstatic Port_t siocniobase; 40366230Sjhb#ifndef __alpha__ 40451078Speterstatic int siocnunit; 40566230Sjhb#endif 40651078Speterstatic Port_t siogdbiobase; 40751078Speterstatic int siogdbunit = -1; 40872238Sjhbstatic void *sio_slow_ih; 40972238Sjhbstatic void *sio_fast_ih; 41051078Speterstatic int sio_timeout; 41151078Speterstatic int sio_timeouts_until_log; 41251078Speterstatic struct callout_handle sio_timeout_handle 41351078Speter = CALLOUT_HANDLE_INITIALIZER(&sio_timeout_handle); 41453344Speterstatic int sio_numunits; 41551078Speter 41651078Speterstatic struct speedtab comspeedtab[] = { 41751078Speter { 0, 0 }, 41851078Speter { 50, COMBRD(50) }, 41951078Speter { 75, COMBRD(75) }, 42051078Speter { 110, COMBRD(110) }, 42151078Speter { 134, COMBRD(134) }, 42251078Speter { 150, COMBRD(150) }, 42351078Speter { 200, COMBRD(200) }, 42451078Speter { 300, COMBRD(300) }, 42551078Speter { 600, COMBRD(600) }, 42651078Speter { 1200, COMBRD(1200) }, 42751078Speter { 1800, COMBRD(1800) }, 42851078Speter { 2400, COMBRD(2400) }, 42951078Speter { 4800, COMBRD(4800) }, 43051078Speter { 9600, COMBRD(9600) }, 43151078Speter { 19200, COMBRD(19200) }, 43251078Speter { 38400, COMBRD(38400) }, 43351078Speter { 57600, COMBRD(57600) }, 43451078Speter { 115200, COMBRD(115200) }, 43551078Speter { -1, -1 } 43651078Speter}; 43751078Speter 43851078Speter#ifdef COM_ESP 43951078Speter/* XXX configure this properly. */ 44051078Speterstatic Port_t likely_com_ports[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, }; 44151078Speterstatic Port_t likely_esp_ports[] = { 0x140, 0x180, 0x280, 0 }; 44251078Speter#endif 44351078Speter 44451078Speter/* 44551078Speter * handle sysctl read/write requests for console speed 44651078Speter * 44751078Speter * In addition to setting comdefaultrate for I/O through /dev/console, 44851078Speter * also set the initial and lock values for the /dev/ttyXX device 44951078Speter * if there is one associated with the console. Finally, if the /dev/tty 45051078Speter * device has already been open, change the speed on the open running port 45151078Speter * itself. 45251078Speter */ 45351078Speter 45451078Speterstatic int 45562573Sphksysctl_machdep_comdefaultrate(SYSCTL_HANDLER_ARGS) 45651078Speter{ 45751078Speter int error, s; 45851078Speter speed_t newspeed; 45951078Speter struct com_s *com; 46051078Speter struct tty *tp; 46151078Speter 46251078Speter newspeed = comdefaultrate; 46351078Speter 46451078Speter error = sysctl_handle_opaque(oidp, &newspeed, sizeof newspeed, req); 46551078Speter if (error || !req->newptr) 46651078Speter return (error); 46751078Speter 46851078Speter comdefaultrate = newspeed; 46951078Speter 47051078Speter if (comconsole < 0) /* serial console not selected? */ 47151078Speter return (0); 47251078Speter 47351078Speter com = com_addr(comconsole); 47457915Simp if (com == NULL) 47551078Speter return (ENXIO); 47651078Speter 47751078Speter /* 47851078Speter * set the initial and lock rates for /dev/ttydXX and /dev/cuaXX 47951078Speter * (note, the lock rates really are boolean -- if non-zero, disallow 48051078Speter * speed changes) 48151078Speter */ 48251078Speter com->it_in.c_ispeed = com->it_in.c_ospeed = 48351078Speter com->lt_in.c_ispeed = com->lt_in.c_ospeed = 48451078Speter com->it_out.c_ispeed = com->it_out.c_ospeed = 48551078Speter com->lt_out.c_ispeed = com->lt_out.c_ospeed = comdefaultrate; 48651078Speter 48751078Speter /* 48851078Speter * if we're open, change the running rate too 48951078Speter */ 49051078Speter tp = com->tp; 49151078Speter if (tp && (tp->t_state & TS_ISOPEN)) { 49251078Speter tp->t_termios.c_ispeed = 49351078Speter tp->t_termios.c_ospeed = comdefaultrate; 49451078Speter s = spltty(); 49551078Speter error = comparam(tp, &tp->t_termios); 49651078Speter splx(s); 49751078Speter } 49851078Speter return error; 49951078Speter} 50051078Speter 50151078SpeterSYSCTL_PROC(_machdep, OID_AUTO, conspeed, CTLTYPE_INT | CTLFLAG_RW, 50251078Speter 0, 0, sysctl_machdep_comdefaultrate, "I", ""); 50351078Speter 50453344Speter#define SET_FLAG(dev, bit) device_set_flags(dev, device_get_flags(dev) | (bit)) 50553344Speter#define CLR_FLAG(dev, bit) device_set_flags(dev, device_get_flags(dev) & ~(bit)) 50653344Speter 50751078Speter#if NCARD > 0 50852471Simpstatic int 50952471Simpsio_pccard_probe(dev) 51052471Simp device_t dev; 51151078Speter{ 51254386Simp /* Do not probe IRQ - pccard doesn't turn on the interrupt line */ 51354386Simp /* until bus_setup_intr */ 51453344Speter SET_FLAG(dev, COM_C_NOPROBE); 51553344Speter 51658885Simp return (sioprobe(dev, 0)); 51752471Simp} 51851078Speter 51952471Simpstatic int 52052471Simpsio_pccard_attach(dev) 52152471Simp device_t dev; 52252471Simp{ 52358885Simp return (sioattach(dev, 0)); 52451078Speter} 52551078Speter 52651078Speter/* 52752471Simp * sio_detach - unload the driver and clear the table. 52851078Speter * XXX TODO: 52951078Speter * This is usually called when the card is ejected, but 53051078Speter * can be caused by a modunload of a controller driver. 53151078Speter * The idea is to reset the driver's view of the device 53251078Speter * and ensure that any driver entry points such as 53351078Speter * read and write do not hang. 53451078Speter */ 53553978Simpstatic int 53652471Simpsio_pccard_detach(dev) 53752471Simp device_t dev; 53851078Speter{ 53951078Speter struct com_s *com; 54065131Sphk int i; 54151078Speter 54252471Simp com = (struct com_s *) device_get_softc(dev); 54357915Simp if (com == NULL) { 54452471Simp device_printf(dev, "NULL com in siounload\n"); 54554386Simp return (0); 54651078Speter } 54754386Simp com->gone = 1; 54865131Sphk for (i = 0 ; i < 6; i++) 54965131Sphk destroy_dev(com->devs[i]); 55054386Simp if (com->irqres) { 55154386Simp bus_teardown_intr(dev, com->irqres, com->cookie); 55254386Simp bus_release_resource(dev, SYS_RES_IRQ, 0, com->irqres); 55354386Simp } 55454386Simp if (com->ioportres) 55554386Simp bus_release_resource(dev, SYS_RES_IOPORT, 0, com->ioportres); 55651078Speter if (com->tp && (com->tp->t_state & TS_ISOPEN)) { 55757915Simp device_printf(dev, "still open, forcing close\n"); 55877750Simp (*linesw[com->tp->t_line].l_close)(com->tp, 0); 55951078Speter com->tp->t_gen++; 56051078Speter ttyclose(com->tp); 56151078Speter ttwakeup(com->tp); 56251078Speter ttwwakeup(com->tp); 56351078Speter } else { 56451078Speter if (com->ibuf != NULL) 56551078Speter free(com->ibuf, M_DEVBUF); 56651078Speter } 56757915Simp device_printf(dev, "unloaded\n"); 56853978Simp return (0); 56951078Speter} 57051078Speter#endif /* NCARD > 0 */ 57151078Speter 57258885Simp#if NPCI > 0 57358885Simpstruct pci_ids { 57458885Simp u_int32_t type; 57558885Simp const char *desc; 57658885Simp int rid; 57758885Simp}; 57851078Speter 57958885Simpstatic struct pci_ids pci_ids[] = { 58058885Simp { 0x100812b9, "3COM PCI FaxModem", 0x10 }, 58177750Simp { 0x048011c1, "Lucent kermit based PCI Modem", 0x14 }, 58276869Ssanpei { 0x0000151f, "SmartLink 5634PCV SurfRider", 0x10 }, 58382682Smurray { 0x01101407, "Koutech IOFLEX-2S PCI Dual Port Serial", 0x10 }, 58482682Smurray { 0x01111407, "Koutech IOFLEX-2S PCI Dual Port Serial", 0x10 }, 58577750Simp /* { 0xXXXXXXXX, "Xircom Cardbus modem", 0x10 }, */ 58658885Simp { 0x00000000, NULL, 0 } 58758885Simp}; 58858885Simp 58958885Simpstatic int 59058885Simpsio_pci_attach(dev) 59158885Simp device_t dev; 59258885Simp{ 59358885Simp u_int32_t type; 59458885Simp struct pci_ids *id; 59558885Simp 59658885Simp type = pci_get_devid(dev); 59758885Simp id = pci_ids; 59858885Simp while (id->type && id->type != type) 59958885Simp id++; 60058885Simp if (id->desc == NULL) 60158885Simp return (ENXIO); 60258885Simp sio_pci_kludge_unit(dev); 60358885Simp return (sioattach(dev, id->rid)); 60458885Simp} 60558885Simp 60658885Simp/* 60758885Simp * Don't cut and paste this to other drivers. It is a horrible kludge 60858885Simp * which will fail to work and also be unnecessary in future versions. 60958885Simp */ 61058885Simpstatic void 61158885Simpsio_pci_kludge_unit(dev) 61258885Simp device_t dev; 61358885Simp{ 61458885Simp devclass_t dc; 61558885Simp int err; 61658885Simp int start; 61758885Simp int unit; 61858885Simp 61958885Simp unit = 0; 62058885Simp start = 0; 62158885Simp while (resource_int_value("sio", unit, "port", &start) == 0 && 62258885Simp start > 0) 62358885Simp unit++; 62458885Simp if (device_get_unit(dev) < unit) { 62558885Simp dc = device_get_devclass(dev); 62658885Simp while (devclass_get_device(dc, unit)) 62758885Simp unit++; 62858885Simp device_printf(dev, "moving to sio%d\n", unit); 62958885Simp err = device_set_unit(dev, unit); /* EVIL DO NOT COPY */ 63058885Simp if (err) 63158885Simp device_printf(dev, "error moving device %d\n", err); 63258885Simp } 63358885Simp} 63458885Simp 63558885Simpstatic int 63658885Simpsio_pci_probe(dev) 63758885Simp device_t dev; 63858885Simp{ 63958885Simp u_int32_t type; 64058885Simp struct pci_ids *id; 64158885Simp 64258885Simp type = pci_get_devid(dev); 64358885Simp id = pci_ids; 64458885Simp while (id->type && id->type != type) 64558885Simp id++; 64658885Simp if (id->desc == NULL) 64758885Simp return (ENXIO); 64858885Simp device_set_desc(dev, id->desc); 64958885Simp return (sioprobe(dev, id->rid)); 65058885Simp} 65158885Simp#endif /* NPCI > 0 */ 65258885Simp 65351078Speterstatic struct isa_pnp_id sio_ids[] = { 65451078Speter {0x0005d041, "Standard PC COM port"}, /* PNP0500 */ 65551078Speter {0x0105d041, "16550A-compatible COM port"}, /* PNP0501 */ 65651078Speter {0x0205d041, "Multiport serial device (non-intelligent 16550)"}, /* PNP0502 */ 65751078Speter {0x1005d041, "Generic IRDA-compatible device"}, /* PNP0510 */ 65851078Speter {0x1105d041, "Generic IRDA-compatible device"}, /* PNP0511 */ 65954944Speter /* Devices that do not have a compatid */ 66060696Stanimura {0x12206804, NULL}, /* ACH2012 - 5634BTS 56K Video Ready Modem */ 66154944Speter {0x7602a904, NULL}, /* AEI0276 - 56K v.90 Fax Modem (LKT) */ 66254944Speter {0x00007905, NULL}, /* AKY0000 - 56K Plug&Play Modem */ 66354944Speter {0x01405407, NULL}, /* AZT4001 - AZT3000 PnP SOUND DEVICE, MODEM */ 66454944Speter {0x56039008, NULL}, /* BDP0356 - Best Data 56x2 */ 66554944Speter {0x36339008, NULL}, /* BDP3336 - Best Data Prods. 336F */ 66654944Speter {0x0014490a, NULL}, /* BRI1400 - Boca 33.6 PnP */ 66754944Speter {0x0015490a, NULL}, /* BRI1500 - Internal Fax Data */ 66854944Speter {0x0034490a, NULL}, /* BRI3400 - Internal ACF Modem */ 66965438Ssheldonh {0x0094490a, NULL}, /* BRI9400 - Boca K56Flex PnP */ 67054944Speter {0x00b4490a, NULL}, /* BRIB400 - Boca 56k PnP */ 67154944Speter {0x0030320d, NULL}, /* CIR3000 - Cirrus Logic V43 */ 67256229Speter {0x0100440e, NULL}, /* CRD0001 - Cardinal MVP288IV ? */ 67360674Stanimura {0x36033610, NULL}, /* DAV0336 - DAVICOM 336PNP MODEM */ 67459888Stanimura {0x0000aa1a, NULL}, /* FUJ0000 - FUJITSU Modem 33600 PNP/I2 */ 67554944Speter {0x1200c31e, NULL}, /* GVC0012 - VF1128HV-R9 (win modem?) */ 67654944Speter {0x0303c31e, NULL}, /* GVC0303 - MaxTech 33.6 PnP D/F/V */ 67755124Speter {0x0505c31e, NULL}, /* GVC0505 - GVC 56k Faxmodem */ 67873961Ssanpei {0x0116c31e, NULL}, /* GVC1601 - Rockwell V.34 Plug & Play Modem */ 67954944Speter {0x0050c31e, NULL}, /* GVC5000 - some GVC modem */ 68054944Speter {0x3800f91e, NULL}, /* GWY0038 - Telepath with v.90 */ 68154944Speter {0x9062f91e, NULL}, /* GWY6290 - Telepath with x2 Technology */ 68273960Ssanpei {0x8100e425, NULL}, /* IOD0081 - I-O DATA DEVICE,INC. IFML-560 */ 68366920Stanimura {0x21002534, NULL}, /* MAE0021 - Jetstream Int V.90 56k Voice Series 2*/ 68454944Speter {0x0000f435, NULL}, /* MOT0000 - Motorola ModemSURFR 33.6 Intern */ 68554944Speter {0x5015f435, NULL}, /* MOT1550 - Motorola ModemSURFR 56K Modem */ 68654944Speter {0xf015f435, NULL}, /* MOT15F0 - Motorola VoiceSURFR 56K Modem */ 68754944Speter {0x6045f435, NULL}, /* MOT4560 - Motorola ? */ 68854944Speter {0x61e7a338, NULL}, /* NECE761 - 33.6Modem */ 68970356Stanimura {0x08804f3f, NULL}, /* OZO8008 - Zoom (33.6k Modem) */ 69060674Stanimura {0x0f804f3f, NULL}, /* OZO800f - Zoom 2812 (56k Modem) */ 69154944Speter {0x39804f3f, NULL}, /* OZO8039 - Zoom 56k flex */ 69277222Ssanpei {0x00914f3f, NULL}, /* OZO9100 - Zoom 2919 (K56 Faxmodem) */ 69357769Speter {0x3024a341, NULL}, /* PMC2430 - Pace 56 Voice Internal Modem */ 69454944Speter {0x1000eb49, NULL}, /* ROK0010 - Rockwell ? */ 69554944Speter {0x5002734a, NULL}, /* RSS0250 - 5614Jx3(G) Internal Modem */ 69660708Stanimura {0x6202734a, NULL}, /* RSS0262 - 5614Jx3[G] V90+K56Flex Modem */ 69754944Speter {0xc100ad4d, NULL}, /* SMM00C1 - Leopard 56k PnP */ 69856229Speter {0x9012b04e, NULL}, /* SUP1290 - Supra ? */ 69954944Speter {0x1013b04e, NULL}, /* SUP1310 - SupraExpress 336i PnP */ 70054944Speter {0x8013b04e, NULL}, /* SUP1380 - SupraExpress 288i PnP Voice */ 70154944Speter {0x8113b04e, NULL}, /* SUP1381 - SupraExpress 336i PnP Voice */ 70254944Speter {0x5016b04e, NULL}, /* SUP1650 - Supra 336i Sp Intl */ 70360947Stanimura {0x7016b04e, NULL}, /* SUP1670 - Supra 336i V+ Intl */ 70454944Speter {0x7420b04e, NULL}, /* SUP2070 - Supra ? */ 70554944Speter {0x8020b04e, NULL}, /* SUP2080 - Supra ? */ 70654944Speter {0x8420b04e, NULL}, /* SUP2084 - SupraExpress 56i PnP */ 70756229Speter {0x7121b04e, NULL}, /* SUP2171 - SupraExpress 56i Sp? */ 70854944Speter {0x8024b04e, NULL}, /* SUP2480 - Supra ? */ 70954944Speter {0x01007256, NULL}, /* USR0001 - U.S. Robotics Inc., Sportster W */ 71054944Speter {0x02007256, NULL}, /* USR0002 - U.S. Robotics Inc. Sportster 33. */ 71154944Speter {0x04007256, NULL}, /* USR0004 - USR Sportster 14.4k */ 71254944Speter {0x06007256, NULL}, /* USR0006 - USR Sportster 33.6k */ 71356229Speter {0x11007256, NULL}, /* USR0011 - USR ? */ 71454944Speter {0x01017256, NULL}, /* USR0101 - USR ? */ 71554944Speter {0x30207256, NULL}, /* USR2030 - U.S.Robotics Inc. Sportster 560 */ 71654944Speter {0x50207256, NULL}, /* USR2050 - U.S.Robotics Inc. Sportster 33. */ 71754944Speter {0x70207256, NULL}, /* USR2070 - U.S.Robotics Inc. Sportster 560 */ 71854944Speter {0x30307256, NULL}, /* USR3030 - U.S. Robotics 56K FAX INT */ 71954944Speter {0x31307256, NULL}, /* USR3031 - U.S. Robotics 56K FAX INT */ 72058848Speter {0x50307256, NULL}, /* USR3050 - U.S. Robotics 56K FAX INT */ 72154944Speter {0x70307256, NULL}, /* USR3070 - U.S. Robotics 56K Voice INT */ 72256229Speter {0x90307256, NULL}, /* USR3090 - USR ? */ 72364688Speter {0x70917256, NULL}, /* USR9170 - U.S. Robotics 56K FAX INT */ 72454944Speter {0x90917256, NULL}, /* USR9190 - USR 56k Voice INT */ 72554944Speter {0x0300695c, NULL}, /* WCI0003 - Fax/Voice/Modem/Speakphone/Asvd */ 72665469Ssheldonh {0x01a0896a, NULL}, /* ZTIA001 - Zoom Internal V90 Faxmodem */ 72754944Speter {0x61f7896a, NULL}, /* ZTIF761 - Zoom ComStar 33.6 */ 72851078Speter {0} 72951078Speter}; 73051078Speter 73156229Speter 73256229Speter 73351078Speterstatic int 73452471Simpsio_isa_probe(dev) 73552471Simp device_t dev; 73652471Simp{ 73752471Simp /* Check isapnp ids */ 73852471Simp if (ISA_PNP_PROBE(device_get_parent(dev), dev, sio_ids) == ENXIO) 73952471Simp return (ENXIO); 74058885Simp return (sioprobe(dev, 0)); 74152471Simp} 74252471Simp 74352471Simpstatic int 74458885Simpsioprobe(dev, xrid) 74551078Speter device_t dev; 74658885Simp int xrid; 74751078Speter{ 74853344Speter#if 0 74951078Speter static bool_t already_init; 75053344Speter device_t xdev; 75153344Speter#endif 75260471Snyan struct com_s *com; 75351078Speter bool_t failures[10]; 75451078Speter int fn; 75551078Speter device_t idev; 75651078Speter Port_t iobase; 75751078Speter intrmask_t irqmap[4]; 75851078Speter intrmask_t irqs; 75951078Speter u_char mcr_image; 76051078Speter int result; 76154206Speter u_long xirq; 76251088Speter u_int flags = device_get_flags(dev); 76351078Speter int rid; 76451078Speter struct resource *port; 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 77670174Sjhb if (atomic_cmpset_int(&sio_inited, 0, 1)) 77772238Sjhb mtx_init(&sio_lock, driver_name, MTX_SPIN); 77870174Sjhb 77953344Speter#if 0 78053344Speter /* 78153344Speter * XXX this is broken - when we are first called, there are no 78253344Speter * previously configured IO ports. We could hard code 78353344Speter * 0x3f8, 0x2f8, 0x3e8, 0x2e8 etc but that's probably worse. 78453344Speter * This code has been doing nothing since the conversion since 78553344Speter * "count" is zero the first time around. 78653344Speter */ 78751078Speter if (!already_init) { 78851078Speter /* 78951078Speter * Turn off MCR_IENABLE for all likely serial ports. An unused 79051078Speter * port with its MCR_IENABLE gate open will inhibit interrupts 79151078Speter * from any used port that shares the interrupt vector. 79251078Speter * XXX the gate enable is elsewhere for some multiports. 79351078Speter */ 79451078Speter device_t *devs; 79553344Speter int count, i, xioport; 79651078Speter 79751078Speter devclass_get_devices(sio_devclass, &devs, &count); 79851078Speter for (i = 0; i < count; i++) { 79951078Speter xdev = devs[i]; 80054194Speter if (device_is_enabled(xdev) && 80154194Speter bus_get_resource(xdev, SYS_RES_IOPORT, 0, &xioport, 80254194Speter NULL) == 0) 80353344Speter outb(xioport + com_mcr, 0); 80451078Speter } 80551078Speter free(devs, M_TEMP); 80651078Speter already_init = TRUE; 80751078Speter } 80853344Speter#endif 80951078Speter 81051078Speter if (COM_LLCONSOLE(flags)) { 81151078Speter printf("sio%d: reserved for low-level i/o\n", 81251078Speter device_get_unit(dev)); 81356788Sbde bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 81451078Speter return (ENXIO); 81551078Speter } 81651078Speter 81751078Speter /* 81851078Speter * If the device is on a multiport card and has an AST/4 81951078Speter * compatible interrupt control register, initialize this 82051078Speter * register and prepare to leave MCR_IENABLE clear in the mcr. 82151078Speter * Otherwise, prepare to set MCR_IENABLE in the mcr. 82251078Speter * Point idev to the device struct giving the correct id_irq. 82351078Speter * This is the struct for the master device if there is one. 82451078Speter */ 82551078Speter idev = dev; 82651078Speter mcr_image = MCR_IENABLE; 82751078Speter#ifdef COM_MULTIPORT 82857234Sbde if (COM_ISMULTIPORT(flags)) { 82954206Speter Port_t xiobase; 83054206Speter u_long io; 83154206Speter 83251078Speter idev = devclass_get_device(sio_devclass, COM_MPMASTER(flags)); 83351078Speter if (idev == NULL) { 83451078Speter printf("sio%d: master device %d not configured\n", 83551078Speter device_get_unit(dev), COM_MPMASTER(flags)); 83651078Speter idev = dev; 83751078Speter } 83857234Sbde if (!COM_NOTAST4(flags)) { 83957234Sbde if (bus_get_resource(idev, SYS_RES_IOPORT, 0, &io, 84057234Sbde NULL) == 0) { 84157234Sbde xiobase = io; 84257234Sbde if (bus_get_resource(idev, SYS_RES_IRQ, 0, 84357234Sbde NULL, NULL) == 0) 84457234Sbde outb(xiobase + com_scr, 0x80); 84557234Sbde else 84657234Sbde outb(xiobase + com_scr, 0); 84757234Sbde } 84857234Sbde mcr_image = 0; 84951078Speter } 85051078Speter } 85151078Speter#endif /* COM_MULTIPORT */ 85254194Speter if (bus_get_resource(idev, SYS_RES_IRQ, 0, NULL, NULL) != 0) 85351078Speter mcr_image = 0; 85451078Speter 85551078Speter bzero(failures, sizeof failures); 85651078Speter iobase = rman_get_start(port); 85751078Speter 85851078Speter /* 85951078Speter * We don't want to get actual interrupts, just masked ones. 86051078Speter * Interrupts from this line should already be masked in the ICU, 86151078Speter * but mask them in the processor as well in case there are some 86251078Speter * (misconfigured) shared interrupts. 86351078Speter */ 86472200Sbmilekic mtx_lock_spin(&sio_lock); 86551078Speter/* EXTRA DELAY? */ 86651078Speter 86751078Speter /* 86851078Speter * Initialize the speed and the word size and wait long enough to 86951078Speter * drain the maximum of 16 bytes of junk in device output queues. 87051078Speter * The speed is undefined after a master reset and must be set 87151078Speter * before relying on anything related to output. There may be 87251078Speter * junk after a (very fast) soft reboot and (apparently) after 87351078Speter * master reset. 87451078Speter * XXX what about the UART bug avoided by waiting in comparam()? 87551078Speter * We don't want to to wait long enough to drain at 2 bps. 87651078Speter */ 87751078Speter if (iobase == siocniobase) 87851078Speter DELAY((16 + 1) * 1000000 / (comdefaultrate / 10)); 87951078Speter else { 88060471Snyan sio_setreg(com, com_cfcr, CFCR_DLAB | CFCR_8BITS); 88160471Snyan sio_setreg(com, com_dlbl, COMBRD(SIO_TEST_SPEED) & 0xff); 88260471Snyan sio_setreg(com, com_dlbh, (u_int) COMBRD(SIO_TEST_SPEED) >> 8); 88360471Snyan sio_setreg(com, com_cfcr, CFCR_8BITS); 88451078Speter DELAY((16 + 1) * 1000000 / (SIO_TEST_SPEED / 10)); 88551078Speter } 88651078Speter 88751078Speter /* 88851078Speter * Enable the interrupt gate and disable device interupts. This 88951078Speter * should leave the device driving the interrupt line low and 89051078Speter * guarantee an edge trigger if an interrupt can be generated. 89151078Speter */ 89251078Speter/* EXTRA DELAY? */ 89360471Snyan sio_setreg(com, com_mcr, mcr_image); 89460471Snyan sio_setreg(com, com_ier, 0); 89551078Speter DELAY(1000); /* XXX */ 89651078Speter irqmap[0] = isa_irq_pending(); 89751078Speter 89851078Speter /* 89951078Speter * Attempt to set loopback mode so that we can send a null byte 90051078Speter * without annoying any external device. 90151078Speter */ 90251078Speter/* EXTRA DELAY? */ 90360471Snyan sio_setreg(com, com_mcr, mcr_image | MCR_LOOPBACK); 90451078Speter 90551078Speter /* 90651078Speter * Attempt to generate an output interrupt. On 8250's, setting 90751078Speter * IER_ETXRDY generates an interrupt independent of the current 90851078Speter * setting and independent of whether the THR is empty. On 16450's, 90951078Speter * setting IER_ETXRDY generates an interrupt independent of the 91051078Speter * current setting. On 16550A's, setting IER_ETXRDY only 91151078Speter * generates an interrupt when IER_ETXRDY is not already set. 91251078Speter */ 91360471Snyan sio_setreg(com, com_ier, IER_ETXRDY); 91451078Speter 91551078Speter /* 91651078Speter * On some 16x50 incompatibles, setting IER_ETXRDY doesn't generate 91751078Speter * an interrupt. They'd better generate one for actually doing 91851078Speter * output. Loopback may be broken on the same incompatibles but 91951078Speter * it's unlikely to do more than allow the null byte out. 92051078Speter */ 92160471Snyan sio_setreg(com, com_data, 0); 92251078Speter DELAY((1 + 2) * 1000000 / (SIO_TEST_SPEED / 10)); 92351078Speter 92451078Speter /* 92551078Speter * Turn off loopback mode so that the interrupt gate works again 92651078Speter * (MCR_IENABLE was hidden). This should leave the device driving 92751078Speter * an interrupt line high. It doesn't matter if the interrupt 92851078Speter * line oscillates while we are not looking at it, since interrupts 92951078Speter * are disabled. 93051078Speter */ 93151078Speter/* EXTRA DELAY? */ 93260471Snyan sio_setreg(com, com_mcr, mcr_image); 93351078Speter 93451078Speter /* 93552471Simp * Some pcmcia cards have the "TXRDY bug", so we check everyone 93651078Speter * for IIR_TXRDY implementation ( Palido 321s, DC-1S... ) 93751078Speter */ 93853370Speter if (COM_NOPROBE(flags)) { 93953370Speter /* Reading IIR register twice */ 94053370Speter for (fn = 0; fn < 2; fn ++) { 94153370Speter DELAY(10000); 94260471Snyan failures[6] = sio_getreg(com, com_iir); 94353370Speter } 94453370Speter /* Check IIR_TXRDY clear ? */ 94553370Speter result = 0; 94653370Speter if (failures[6] & IIR_TXRDY) { 94753370Speter /* Nop, Double check with clearing IER */ 94860471Snyan sio_setreg(com, com_ier, 0); 94960471Snyan if (sio_getreg(com, com_iir) & IIR_NOPEND) { 95053370Speter /* Ok. we're familia this gang */ 95153370Speter SET_FLAG(dev, COM_C_IIR_TXRDYBUG); 95253370Speter } else { 95353370Speter /* Unknown, Just omit this chip.. XXX */ 95453370Speter result = ENXIO; 95581793Simp sio_setreg(com, com_mcr, 0); 95653370Speter } 95751078Speter } else { 95853370Speter /* OK. this is well-known guys */ 95953370Speter CLR_FLAG(dev, COM_C_IIR_TXRDYBUG); 96051078Speter } 96181793Simp sio_setreg(com, com_ier, 0); 96260471Snyan sio_setreg(com, com_cfcr, CFCR_8BITS); 96372200Sbmilekic mtx_unlock_spin(&sio_lock); 96453344Speter bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 96553344Speter return (iobase == siocniobase ? 0 : result); 96653344Speter } 96753344Speter 96851078Speter /* 96951078Speter * Check that 97051078Speter * o the CFCR, IER and MCR in UART hold the values written to them 97151078Speter * (the values happen to be all distinct - this is good for 97251078Speter * avoiding false positive tests from bus echoes). 97351078Speter * o an output interrupt is generated and its vector is correct. 97451078Speter * o the interrupt goes away when the IIR in the UART is read. 97551078Speter */ 97651078Speter/* EXTRA DELAY? */ 97760471Snyan failures[0] = sio_getreg(com, com_cfcr) - CFCR_8BITS; 97860471Snyan failures[1] = sio_getreg(com, com_ier) - IER_ETXRDY; 97960471Snyan failures[2] = sio_getreg(com, com_mcr) - mcr_image; 98051078Speter DELAY(10000); /* Some internal modems need this time */ 98151078Speter irqmap[1] = isa_irq_pending(); 98260471Snyan failures[4] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_TXRDY; 98351078Speter DELAY(1000); /* XXX */ 98451078Speter irqmap[2] = isa_irq_pending(); 98560471Snyan failures[6] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 98651078Speter 98751078Speter /* 98851078Speter * Turn off all device interrupts and check that they go off properly. 98951078Speter * Leave MCR_IENABLE alone. For ports without a master port, it gates 99051078Speter * the OUT2 output of the UART to 99151078Speter * the ICU input. Closing the gate would give a floating ICU input 99251078Speter * (unless there is another device driving it) and spurious interrupts. 99351078Speter * (On the system that this was first tested on, the input floats high 99451078Speter * and gives a (masked) interrupt as soon as the gate is closed.) 99551078Speter */ 99660471Snyan sio_setreg(com, com_ier, 0); 99760471Snyan sio_setreg(com, com_cfcr, CFCR_8BITS); /* dummy to avoid bus echo */ 99860471Snyan failures[7] = sio_getreg(com, com_ier); 99951078Speter DELAY(1000); /* XXX */ 100051078Speter irqmap[3] = isa_irq_pending(); 100160471Snyan failures[9] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 100251078Speter 100372200Sbmilekic mtx_unlock_spin(&sio_lock); 100451078Speter 100551078Speter irqs = irqmap[1] & ~irqmap[0]; 100654194Speter if (bus_get_resource(idev, SYS_RES_IRQ, 0, &xirq, NULL) == 0 && 100754194Speter ((1 << xirq) & irqs) == 0) 100851078Speter printf( 100954206Speter "sio%d: configured irq %ld not in bitmap of probed irqs %#x\n", 101053344Speter device_get_unit(dev), xirq, irqs); 101151078Speter if (bootverbose) 101251078Speter printf("sio%d: irq maps: %#x %#x %#x %#x\n", 101351078Speter device_get_unit(dev), 101451078Speter irqmap[0], irqmap[1], irqmap[2], irqmap[3]); 101551078Speter 101651078Speter result = 0; 101751078Speter for (fn = 0; fn < sizeof failures; ++fn) 101851078Speter if (failures[fn]) { 101960471Snyan sio_setreg(com, com_mcr, 0); 102051078Speter result = ENXIO; 102151078Speter if (bootverbose) { 102251078Speter printf("sio%d: probe failed test(s):", 102351078Speter device_get_unit(dev)); 102451078Speter for (fn = 0; fn < sizeof failures; ++fn) 102551078Speter if (failures[fn]) 102651078Speter printf(" %d", fn); 102751078Speter printf("\n"); 102851078Speter } 102951078Speter break; 103051078Speter } 103151078Speter bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 103251078Speter return (iobase == siocniobase ? 0 : result); 103351078Speter} 103451078Speter 103551078Speter#ifdef COM_ESP 103651078Speterstatic int 103751078Speterespattach(com, esp_port) 103851078Speter struct com_s *com; 103951078Speter Port_t esp_port; 104051078Speter{ 104151078Speter u_char dips; 104251078Speter u_char val; 104351078Speter 104451078Speter /* 104551078Speter * Check the ESP-specific I/O port to see if we're an ESP 104651078Speter * card. If not, return failure immediately. 104751078Speter */ 104851078Speter if ((inb(esp_port) & 0xf3) == 0) { 104951078Speter printf(" port 0x%x is not an ESP board?\n", esp_port); 105051078Speter return (0); 105151078Speter } 105251078Speter 105351078Speter /* 105451078Speter * We've got something that claims to be a Hayes ESP card. 105551078Speter * Let's hope so. 105651078Speter */ 105751078Speter 105851078Speter /* Get the dip-switch configuration */ 105951078Speter outb(esp_port + ESP_CMD1, ESP_GETDIPS); 106051078Speter dips = inb(esp_port + ESP_STATUS1); 106151078Speter 106251078Speter /* 106351078Speter * Bits 0,1 of dips say which COM port we are. 106451078Speter */ 106560471Snyan if (rman_get_start(com->ioportres) == likely_com_ports[dips & 0x03]) 106651078Speter printf(" : ESP"); 106751078Speter else { 106851078Speter printf(" esp_port has com %d\n", dips & 0x03); 106951078Speter return (0); 107051078Speter } 107151078Speter 107251078Speter /* 107351078Speter * Check for ESP version 2.0 or later: bits 4,5,6 = 010. 107451078Speter */ 107551078Speter outb(esp_port + ESP_CMD1, ESP_GETTEST); 107651078Speter val = inb(esp_port + ESP_STATUS1); /* clear reg 1 */ 107751078Speter val = inb(esp_port + ESP_STATUS2); 107851078Speter if ((val & 0x70) < 0x20) { 107951078Speter printf("-old (%o)", val & 0x70); 108051078Speter return (0); 108151078Speter } 108251078Speter 108351078Speter /* 108451078Speter * Check for ability to emulate 16550: bit 7 == 1 108551078Speter */ 108651078Speter if ((dips & 0x80) == 0) { 108751078Speter printf(" slave"); 108851078Speter return (0); 108951078Speter } 109051078Speter 109151078Speter /* 109251078Speter * Okay, we seem to be a Hayes ESP card. Whee. 109351078Speter */ 109451078Speter com->esp = TRUE; 109551078Speter com->esp_port = esp_port; 109651078Speter return (1); 109751078Speter} 109851078Speter#endif /* COM_ESP */ 109951078Speter 110051078Speterstatic int 110152471Simpsio_isa_attach(dev) 110252471Simp device_t dev; 110352471Simp{ 110458885Simp return (sioattach(dev, 0)); 110552471Simp} 110652471Simp 110752471Simpstatic int 110858885Simpsioattach(dev, xrid) 110951078Speter device_t dev; 111058885Simp int xrid; 111151078Speter{ 111251078Speter struct com_s *com; 111351078Speter#ifdef COM_ESP 111451078Speter Port_t *espp; 111551078Speter#endif 111651078Speter Port_t iobase; 111751078Speter int unit; 111853344Speter u_int flags; 111951078Speter int rid; 112051078Speter struct resource *port; 112153344Speter int ret; 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 if (siosetwater(com, com->it_in.c_ispeed) != 0) { 119172200Sbmilekic mtx_unlock_spin(&sio_lock); 119256788Sbde /* 119356788Sbde * Leave i/o resources allocated if this is a `cn'-level 119456788Sbde * console, so that other devices can't snarf them. 119556788Sbde */ 119656788Sbde if (iobase != siocniobase) 119756788Sbde bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 119856788Sbde return (ENOMEM); 119951078Speter } 120072200Sbmilekic mtx_unlock_spin(&sio_lock); 120151078Speter termioschars(&com->it_in); 120251078Speter com->it_out = com->it_in; 120351078Speter 120451078Speter /* attempt to determine UART type */ 120551078Speter printf("sio%d: type", unit); 120651078Speter 120751078Speter 120851078Speter#ifdef COM_MULTIPORT 120951078Speter if (!COM_ISMULTIPORT(flags) && !COM_IIR_TXRDYBUG(flags)) 121051078Speter#else 121151078Speter if (!COM_IIR_TXRDYBUG(flags)) 121251078Speter#endif 121351078Speter { 121451078Speter u_char scr; 121551078Speter u_char scr1; 121651078Speter u_char scr2; 121751078Speter 121860471Snyan scr = sio_getreg(com, com_scr); 121960471Snyan sio_setreg(com, com_scr, 0xa5); 122060471Snyan scr1 = sio_getreg(com, com_scr); 122160471Snyan sio_setreg(com, com_scr, 0x5a); 122260471Snyan scr2 = sio_getreg(com, com_scr); 122360471Snyan sio_setreg(com, com_scr, scr); 122451078Speter if (scr1 != 0xa5 || scr2 != 0x5a) { 122551078Speter printf(" 8250"); 122651078Speter goto determined_type; 122751078Speter } 122851078Speter } 122960471Snyan sio_setreg(com, com_fifo, FIFO_ENABLE | FIFO_RX_HIGH); 123051078Speter DELAY(100); 123151078Speter com->st16650a = 0; 123251078Speter switch (inb(com->int_id_port) & IIR_FIFO_MASK) { 123351078Speter case FIFO_RX_LOW: 123451078Speter printf(" 16450"); 123551078Speter break; 123651078Speter case FIFO_RX_MEDL: 123751078Speter printf(" 16450?"); 123851078Speter break; 123951078Speter case FIFO_RX_MEDH: 124051078Speter printf(" 16550?"); 124151078Speter break; 124251078Speter case FIFO_RX_HIGH: 124351078Speter if (COM_NOFIFO(flags)) { 124451078Speter printf(" 16550A fifo disabled"); 124551078Speter } else { 124651078Speter com->hasfifo = TRUE; 124751078Speter if (COM_ST16650A(flags)) { 124851078Speter com->st16650a = 1; 124951078Speter com->tx_fifo_size = 32; 125051078Speter printf(" ST16650A"); 125151078Speter } else { 125251078Speter com->tx_fifo_size = COM_FIFOSIZE(flags); 125351078Speter printf(" 16550A"); 125451078Speter } 125551078Speter } 125651078Speter#ifdef COM_ESP 125751078Speter for (espp = likely_esp_ports; *espp != 0; espp++) 125851078Speter if (espattach(com, *espp)) { 125951078Speter com->tx_fifo_size = 1024; 126051078Speter break; 126151078Speter } 126251078Speter#endif 126351078Speter if (!com->st16650a) { 126451078Speter if (!com->tx_fifo_size) 126551078Speter com->tx_fifo_size = 16; 126651078Speter else 126751078Speter printf(" lookalike with %d bytes FIFO", 126851078Speter com->tx_fifo_size); 126951078Speter } 127051078Speter 127151078Speter break; 127251078Speter } 127351078Speter 127451078Speter#ifdef COM_ESP 127551078Speter if (com->esp) { 127651078Speter /* 127751078Speter * Set 16550 compatibility mode. 127851078Speter * We don't use the ESP_MODE_SCALE bit to increase the 127951078Speter * fifo trigger levels because we can't handle large 128051078Speter * bursts of input. 128151078Speter * XXX flow control should be set in comparam(), not here. 128251078Speter */ 128351078Speter outb(com->esp_port + ESP_CMD1, ESP_SETMODE); 128451078Speter outb(com->esp_port + ESP_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO); 128551078Speter 128651078Speter /* Set RTS/CTS flow control. */ 128751078Speter outb(com->esp_port + ESP_CMD1, ESP_SETFLOWTYPE); 128851078Speter outb(com->esp_port + ESP_CMD2, ESP_FLOW_RTS); 128951078Speter outb(com->esp_port + ESP_CMD2, ESP_FLOW_CTS); 129051078Speter 129151078Speter /* Set flow-control levels. */ 129251078Speter outb(com->esp_port + ESP_CMD1, ESP_SETRXFLOW); 129351078Speter outb(com->esp_port + ESP_CMD2, HIBYTE(768)); 129451078Speter outb(com->esp_port + ESP_CMD2, LOBYTE(768)); 129551078Speter outb(com->esp_port + ESP_CMD2, HIBYTE(512)); 129651078Speter outb(com->esp_port + ESP_CMD2, LOBYTE(512)); 129751078Speter } 129851078Speter#endif /* COM_ESP */ 129960471Snyan sio_setreg(com, com_fifo, 0); 130051078Speterdetermined_type: ; 130151078Speter 130251078Speter#ifdef COM_MULTIPORT 130351078Speter if (COM_ISMULTIPORT(flags)) { 130453344Speter device_t masterdev; 130553344Speter 130651078Speter com->multiport = TRUE; 130751078Speter printf(" (multiport"); 130851078Speter if (unit == COM_MPMASTER(flags)) 130951078Speter printf(" master"); 131051078Speter printf(")"); 131153344Speter masterdev = devclass_get_device(sio_devclass, 131253344Speter COM_MPMASTER(flags)); 131357234Sbde com->no_irq = (masterdev == NULL || bus_get_resource(masterdev, 131457234Sbde SYS_RES_IRQ, 0, NULL, NULL) != 0); 131551078Speter } 131651078Speter#endif /* COM_MULTIPORT */ 131751078Speter if (unit == comconsole) 131851078Speter printf(", console"); 131953344Speter if (COM_IIR_TXRDYBUG(flags)) 132051078Speter printf(" with a bogus IIR_TXRDY register"); 132151078Speter printf("\n"); 132251078Speter 132367551Sjhb if (sio_fast_ih == NULL) { 132472238Sjhb swi_add(&tty_ithd, "tty:sio", siopoll, NULL, SWI_TTY, 0, 132572238Sjhb &sio_fast_ih); 132672238Sjhb swi_add(&clk_ithd, "tty:sio", siopoll, NULL, SWI_TTY, 0, 132772238Sjhb &sio_slow_ih); 132851078Speter } 132965131Sphk com->devs[0] = make_dev(&sio_cdevsw, unit, 133051078Speter UID_ROOT, GID_WHEEL, 0600, "ttyd%r", unit); 133165131Sphk com->devs[1] = make_dev(&sio_cdevsw, unit | CONTROL_INIT_STATE, 133251078Speter UID_ROOT, GID_WHEEL, 0600, "ttyid%r", unit); 133365131Sphk com->devs[2] = make_dev(&sio_cdevsw, unit | CONTROL_LOCK_STATE, 133451078Speter UID_ROOT, GID_WHEEL, 0600, "ttyld%r", unit); 133565131Sphk com->devs[3] = make_dev(&sio_cdevsw, unit | CALLOUT_MASK, 133651078Speter UID_UUCP, GID_DIALER, 0660, "cuaa%r", unit); 133765131Sphk com->devs[4] = make_dev(&sio_cdevsw, 133865131Sphk unit | CALLOUT_MASK | CONTROL_INIT_STATE, 133951078Speter UID_UUCP, GID_DIALER, 0660, "cuaia%r", unit); 134065131Sphk com->devs[5] = make_dev(&sio_cdevsw, 134165131Sphk unit | CALLOUT_MASK | CONTROL_LOCK_STATE, 134251078Speter UID_UUCP, GID_DIALER, 0660, "cuala%r", unit); 134351078Speter com->flags = flags; 134451078Speter com->pps.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR; 134551078Speter pps_init(&com->pps); 134651078Speter 134751078Speter rid = 0; 134851078Speter com->irqres = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0ul, ~0ul, 1, 134953344Speter RF_ACTIVE); 135053344Speter if (com->irqres) { 135153344Speter ret = BUS_SETUP_INTR(device_get_parent(dev), dev, com->irqres, 135265557Sjasone INTR_TYPE_TTY | INTR_FAST, 135354386Simp siointr, com, &com->cookie); 135454194Speter if (ret) { 135554194Speter ret = BUS_SETUP_INTR(device_get_parent(dev), dev, 135654194Speter com->irqres, INTR_TYPE_TTY, 135754386Simp siointr, com, &com->cookie); 135854194Speter if (ret == 0) 135954194Speter device_printf(dev, "unable to activate interrupt in fast mode - using normal mode"); 136054194Speter } 136153344Speter if (ret) 136253344Speter device_printf(dev, "could not activate interrupt\n"); 136378504Siedowse#if defined(DDB) && (defined(BREAK_TO_DEBUGGER) || \ 136478504Siedowse defined(ALT_BREAK_TO_DEBUGGER)) 136578504Siedowse /* 136678504Siedowse * Enable interrupts for early break-to-debugger support 136778504Siedowse * on the console. 136878504Siedowse */ 136978504Siedowse if (ret == 0 && unit == comconsole) 137078504Siedowse outb(siocniobase + com_ier, IER_ERXRDY | IER_ERLS | 137178504Siedowse IER_EMSC); 137278504Siedowse#endif 137353344Speter } 137451078Speter 137551078Speter return (0); 137651078Speter} 137751078Speter 137851078Speterstatic int 137951078Spetersioopen(dev, flag, mode, p) 138051078Speter dev_t dev; 138151078Speter int flag; 138251078Speter int mode; 138351078Speter struct proc *p; 138451078Speter{ 138551078Speter struct com_s *com; 138651078Speter int error; 138751078Speter int mynor; 138851078Speter int s; 138951078Speter struct tty *tp; 139051078Speter int unit; 139151078Speter 139251078Speter mynor = minor(dev); 139351078Speter unit = MINOR_TO_UNIT(mynor); 139453344Speter com = com_addr(unit); 139553344Speter if (com == NULL) 139651078Speter return (ENXIO); 139751078Speter if (com->gone) 139851078Speter return (ENXIO); 139951078Speter if (mynor & CONTROL_MASK) 140051078Speter return (0); 140151078Speter tp = dev->si_tty = com->tp = ttymalloc(com->tp); 140251078Speter s = spltty(); 140351078Speter /* 140451078Speter * We jump to this label after all non-interrupted sleeps to pick 140551078Speter * up any changes of the device state. 140651078Speter */ 140751078Speteropen_top: 140851078Speter while (com->state & CS_DTR_OFF) { 140951078Speter error = tsleep(&com->dtr_wait, TTIPRI | PCATCH, "siodtr", 0); 141051078Speter if (com_addr(unit) == NULL) 141151078Speter return (ENXIO); 141251078Speter if (error != 0 || com->gone) 141351078Speter goto out; 141451078Speter } 141551078Speter if (tp->t_state & TS_ISOPEN) { 141651078Speter /* 141751078Speter * The device is open, so everything has been initialized. 141851078Speter * Handle conflicts. 141951078Speter */ 142051078Speter if (mynor & CALLOUT_MASK) { 142151078Speter if (!com->active_out) { 142251078Speter error = EBUSY; 142351078Speter goto out; 142451078Speter } 142551078Speter } else { 142651078Speter if (com->active_out) { 142751078Speter if (flag & O_NONBLOCK) { 142851078Speter error = EBUSY; 142951078Speter goto out; 143051078Speter } 143151078Speter error = tsleep(&com->active_out, 143251078Speter TTIPRI | PCATCH, "siobi", 0); 143351078Speter if (com_addr(unit) == NULL) 143451078Speter return (ENXIO); 143551078Speter if (error != 0 || com->gone) 143651078Speter goto out; 143751078Speter goto open_top; 143851078Speter } 143951078Speter } 144051078Speter if (tp->t_state & TS_XCLUDE && 144151078Speter suser(p)) { 144251078Speter error = EBUSY; 144351078Speter goto out; 144451078Speter } 144551078Speter } else { 144651078Speter /* 144751078Speter * The device isn't open, so there are no conflicts. 144851078Speter * Initialize it. Initialization is done twice in many 144951078Speter * cases: to preempt sleeping callin opens if we are 145051078Speter * callout, and to complete a callin open after DCD rises. 145151078Speter */ 145251078Speter tp->t_oproc = comstart; 145351078Speter tp->t_param = comparam; 145451654Sphk tp->t_stop = comstop; 145551078Speter tp->t_dev = dev; 145651078Speter tp->t_termios = mynor & CALLOUT_MASK 145751078Speter ? com->it_out : com->it_in; 145851078Speter (void)commctl(com, TIOCM_DTR | TIOCM_RTS, DMSET); 145951078Speter com->poll = com->no_irq; 146051078Speter com->poll_output = com->loses_outints; 146151078Speter ++com->wopeners; 146251078Speter error = comparam(tp, &tp->t_termios); 146351078Speter --com->wopeners; 146451078Speter if (error != 0) 146551078Speter goto out; 146651078Speter /* 146751078Speter * XXX we should goto open_top if comparam() slept. 146851078Speter */ 146951078Speter if (com->hasfifo) { 147051078Speter /* 147151078Speter * (Re)enable and drain fifos. 147251078Speter * 147351078Speter * Certain SMC chips cause problems if the fifos 147451078Speter * are enabled while input is ready. Turn off the 147551078Speter * fifo if necessary to clear the input. We test 147651078Speter * the input ready bit after enabling the fifos 147751078Speter * since we've already enabled them in comparam() 147851078Speter * and to handle races between enabling and fresh 147951078Speter * input. 148051078Speter */ 148151078Speter while (TRUE) { 148260471Snyan sio_setreg(com, com_fifo, 148360471Snyan FIFO_RCV_RST | FIFO_XMT_RST 148460471Snyan | com->fifo_image); 148551078Speter /* 148651078Speter * XXX the delays are for superstitious 148751078Speter * historical reasons. It must be less than 148851078Speter * the character time at the maximum 148951078Speter * supported speed (87 usec at 115200 bps 149051078Speter * 8N1). Otherwise we might loop endlessly 149151078Speter * if data is streaming in. We used to use 149251078Speter * delays of 100. That usually worked 149351078Speter * because DELAY(100) used to usually delay 149451078Speter * for about 85 usec instead of 100. 149551078Speter */ 149651078Speter DELAY(50); 149751078Speter if (!(inb(com->line_status_port) & LSR_RXRDY)) 149851078Speter break; 149960471Snyan sio_setreg(com, com_fifo, 0); 150051078Speter DELAY(50); 150151078Speter (void) inb(com->data_port); 150251078Speter } 150351078Speter } 150451078Speter 150572200Sbmilekic mtx_lock_spin(&sio_lock); 150651078Speter (void) inb(com->line_status_port); 150751078Speter (void) inb(com->data_port); 150851078Speter com->prev_modem_status = com->last_modem_status 150951078Speter = inb(com->modem_status_port); 151051078Speter if (COM_IIR_TXRDYBUG(com->flags)) { 151151078Speter outb(com->intr_ctl_port, IER_ERXRDY | IER_ERLS 151251078Speter | IER_EMSC); 151351078Speter } else { 151451078Speter outb(com->intr_ctl_port, IER_ERXRDY | IER_ETXRDY 151551078Speter | IER_ERLS | IER_EMSC); 151651078Speter } 151772200Sbmilekic mtx_unlock_spin(&sio_lock); 151851078Speter /* 151951078Speter * Handle initial DCD. Callout devices get a fake initial 152051078Speter * DCD (trapdoor DCD). If we are callout, then any sleeping 152151078Speter * callin opens get woken up and resume sleeping on "siobi" 152251078Speter * instead of "siodcd". 152351078Speter */ 152451078Speter /* 152551078Speter * XXX `mynor & CALLOUT_MASK' should be 152651078Speter * `tp->t_cflag & (SOFT_CARRIER | TRAPDOOR_CARRIER) where 152751078Speter * TRAPDOOR_CARRIER is the default initial state for callout 152851078Speter * devices and SOFT_CARRIER is like CLOCAL except it hides 152951078Speter * the true carrier. 153051078Speter */ 153151078Speter if (com->prev_modem_status & MSR_DCD || mynor & CALLOUT_MASK) 153251078Speter (*linesw[tp->t_line].l_modem)(tp, 1); 153351078Speter } 153451078Speter /* 153551078Speter * Wait for DCD if necessary. 153651078Speter */ 153751078Speter if (!(tp->t_state & TS_CARR_ON) && !(mynor & CALLOUT_MASK) 153851078Speter && !(tp->t_cflag & CLOCAL) && !(flag & O_NONBLOCK)) { 153951078Speter ++com->wopeners; 154051078Speter error = tsleep(TSA_CARR_ON(tp), TTIPRI | PCATCH, "siodcd", 0); 154151078Speter if (com_addr(unit) == NULL) 154251078Speter return (ENXIO); 154351078Speter --com->wopeners; 154451078Speter if (error != 0 || com->gone) 154551078Speter goto out; 154651078Speter goto open_top; 154751078Speter } 154851078Speter error = (*linesw[tp->t_line].l_open)(dev, tp); 154951078Speter disc_optim(tp, &tp->t_termios, com); 155051078Speter if (tp->t_state & TS_ISOPEN && mynor & CALLOUT_MASK) 155151078Speter com->active_out = TRUE; 155251078Speter siosettimeout(); 155351078Speterout: 155451078Speter splx(s); 155551078Speter if (!(tp->t_state & TS_ISOPEN) && com->wopeners == 0) 155651078Speter comhardclose(com); 155751078Speter return (error); 155851078Speter} 155951078Speter 156051078Speterstatic int 156151078Spetersioclose(dev, flag, mode, p) 156251078Speter dev_t dev; 156351078Speter int flag; 156451078Speter int mode; 156551078Speter struct proc *p; 156651078Speter{ 156751078Speter struct com_s *com; 156851078Speter int mynor; 156951078Speter int s; 157051078Speter struct tty *tp; 157151078Speter 157251078Speter mynor = minor(dev); 157351078Speter if (mynor & CONTROL_MASK) 157451078Speter return (0); 157551078Speter com = com_addr(MINOR_TO_UNIT(mynor)); 157657915Simp if (com == NULL) 157757915Simp return (ENODEV); 157851078Speter tp = com->tp; 157951078Speter s = spltty(); 158051078Speter (*linesw[tp->t_line].l_close)(tp, flag); 158151078Speter disc_optim(tp, &tp->t_termios, com); 158251654Sphk comstop(tp, FREAD | FWRITE); 158351078Speter comhardclose(com); 158451078Speter ttyclose(tp); 158551078Speter siosettimeout(); 158651078Speter splx(s); 158751078Speter if (com->gone) { 158851078Speter printf("sio%d: gone\n", com->unit); 158951078Speter s = spltty(); 159051078Speter if (com->ibuf != NULL) 159151078Speter free(com->ibuf, M_DEVBUF); 159251078Speter bzero(tp, sizeof *tp); 159351078Speter splx(s); 159451078Speter } 159551078Speter return (0); 159651078Speter} 159751078Speter 159851078Speterstatic void 159951078Spetercomhardclose(com) 160051078Speter struct com_s *com; 160151078Speter{ 160251078Speter int s; 160351078Speter struct tty *tp; 160451078Speter int unit; 160551078Speter 160651078Speter unit = com->unit; 160751078Speter s = spltty(); 160851078Speter com->poll = FALSE; 160951078Speter com->poll_output = FALSE; 161051078Speter com->do_timestamp = FALSE; 161151078Speter com->do_dcd_timestamp = FALSE; 161251078Speter com->pps.ppsparam.mode = 0; 161360471Snyan sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 161478504Siedowse tp = com->tp; 161578504Siedowse 161678504Siedowse#if defined(DDB) && (defined(BREAK_TO_DEBUGGER) || \ 161778504Siedowse defined(ALT_BREAK_TO_DEBUGGER)) 161878504Siedowse /* 161978504Siedowse * Leave interrupts enabled and don't clear DTR if this is the 162078504Siedowse * console. This allows us to detect break-to-debugger events 162178504Siedowse * while the console device is closed. 162278504Siedowse */ 162378504Siedowse if (com->unit != comconsole) 162478504Siedowse#endif 162551078Speter { 162660471Snyan sio_setreg(com, com_ier, 0); 162751078Speter if (tp->t_cflag & HUPCL 162851078Speter /* 162951078Speter * XXX we will miss any carrier drop between here and the 163051078Speter * next open. Perhaps we should watch DCD even when the 163151078Speter * port is closed; it is not sufficient to check it at 163251078Speter * the next open because it might go up and down while 163351078Speter * we're not watching. 163451078Speter */ 163551078Speter || (!com->active_out 163651078Speter && !(com->prev_modem_status & MSR_DCD) 163751078Speter && !(com->it_in.c_cflag & CLOCAL)) 163851078Speter || !(tp->t_state & TS_ISOPEN)) { 163951078Speter (void)commctl(com, TIOCM_DTR, DMBIC); 164051078Speter if (com->dtr_wait != 0 && !(com->state & CS_DTR_OFF)) { 164151078Speter timeout(siodtrwakeup, com, com->dtr_wait); 164251078Speter com->state |= CS_DTR_OFF; 164351078Speter } 164451078Speter } 164551078Speter } 164651078Speter if (com->hasfifo) { 164751078Speter /* 164851078Speter * Disable fifos so that they are off after controlled 164951078Speter * reboots. Some BIOSes fail to detect 16550s when the 165051078Speter * fifos are enabled. 165151078Speter */ 165260471Snyan sio_setreg(com, com_fifo, 0); 165351078Speter } 165451078Speter com->active_out = FALSE; 165551078Speter wakeup(&com->active_out); 165651078Speter wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */ 165751078Speter splx(s); 165851078Speter} 165951078Speter 166051078Speterstatic int 166151078Spetersioread(dev, uio, flag) 166251078Speter dev_t dev; 166351078Speter struct uio *uio; 166451078Speter int flag; 166551078Speter{ 166651078Speter int mynor; 166751078Speter struct com_s *com; 166851078Speter 166951078Speter mynor = minor(dev); 167051078Speter if (mynor & CONTROL_MASK) 167151078Speter return (ENODEV); 167251078Speter com = com_addr(MINOR_TO_UNIT(mynor)); 167357915Simp if (com == NULL || com->gone) 167451078Speter return (ENODEV); 167551078Speter return ((*linesw[com->tp->t_line].l_read)(com->tp, uio, flag)); 167651078Speter} 167751078Speter 167851078Speterstatic int 167951078Spetersiowrite(dev, uio, flag) 168051078Speter dev_t dev; 168151078Speter struct uio *uio; 168251078Speter int flag; 168351078Speter{ 168451078Speter int mynor; 168551078Speter struct com_s *com; 168651078Speter int unit; 168751078Speter 168851078Speter mynor = minor(dev); 168951078Speter if (mynor & CONTROL_MASK) 169051078Speter return (ENODEV); 169151078Speter 169251078Speter unit = MINOR_TO_UNIT(mynor); 169351078Speter com = com_addr(unit); 169457915Simp if (com == NULL || com->gone) 169551078Speter return (ENODEV); 169651078Speter /* 169751078Speter * (XXX) We disallow virtual consoles if the physical console is 169851078Speter * a serial port. This is in case there is a display attached that 169951078Speter * is not the console. In that situation we don't need/want the X 170051078Speter * server taking over the console. 170151078Speter */ 170251078Speter if (constty != NULL && unit == comconsole) 170351078Speter constty = NULL; 170451078Speter return ((*linesw[com->tp->t_line].l_write)(com->tp, uio, flag)); 170551078Speter} 170651078Speter 170751078Speterstatic void 170851078Spetersiobusycheck(chan) 170951078Speter void *chan; 171051078Speter{ 171151078Speter struct com_s *com; 171251078Speter int s; 171351078Speter 171451078Speter com = (struct com_s *)chan; 171551078Speter 171651078Speter /* 171751078Speter * Clear TS_BUSY if low-level output is complete. 171851078Speter * spl locking is sufficient because siointr1() does not set CS_BUSY. 171951078Speter * If siointr1() clears CS_BUSY after we look at it, then we'll get 172051078Speter * called again. Reading the line status port outside of siointr1() 172151078Speter * is safe because CS_BUSY is clear so there are no output interrupts 172251078Speter * to lose. 172351078Speter */ 172451078Speter s = spltty(); 172551078Speter if (com->state & CS_BUSY) 172651078Speter com->extra_state &= ~CSE_BUSYCHECK; /* False alarm. */ 172751078Speter else if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) 172851078Speter == (LSR_TSRE | LSR_TXRDY)) { 172951078Speter com->tp->t_state &= ~TS_BUSY; 173051078Speter ttwwakeup(com->tp); 173151078Speter com->extra_state &= ~CSE_BUSYCHECK; 173251078Speter } else 173351078Speter timeout(siobusycheck, com, hz / 100); 173451078Speter splx(s); 173551078Speter} 173651078Speter 173751078Speterstatic void 173851078Spetersiodtrwakeup(chan) 173951078Speter void *chan; 174051078Speter{ 174151078Speter struct com_s *com; 174251078Speter 174351078Speter com = (struct com_s *)chan; 174451078Speter com->state &= ~CS_DTR_OFF; 174551078Speter wakeup(&com->dtr_wait); 174651078Speter} 174751078Speter 174865557Sjasone/* 174970174Sjhb * Call this function with the sio_lock mutex held. It will return with the 175070174Sjhb * lock still held. 175165557Sjasone */ 175251078Speterstatic void 175351078Spetersioinput(com) 175451078Speter struct com_s *com; 175551078Speter{ 175651078Speter u_char *buf; 175751078Speter int incc; 175851078Speter u_char line_status; 175951078Speter int recv_data; 176051078Speter struct tty *tp; 176151078Speter 176251078Speter buf = com->ibuf; 176351078Speter tp = com->tp; 176451078Speter if (!(tp->t_state & TS_ISOPEN) || !(tp->t_cflag & CREAD)) { 176551078Speter com_events -= (com->iptr - com->ibuf); 176651078Speter com->iptr = com->ibuf; 176751078Speter return; 176851078Speter } 176951078Speter if (tp->t_state & TS_CAN_BYPASS_L_RINT) { 177051078Speter /* 177151078Speter * Avoid the grotesquely inefficient lineswitch routine 177251078Speter * (ttyinput) in "raw" mode. It usually takes about 450 177351078Speter * instructions (that's without canonical processing or echo!). 177451078Speter * slinput is reasonably fast (usually 40 instructions plus 177551078Speter * call overhead). 177651078Speter */ 177751078Speter do { 177865557Sjasone /* 177965557Sjasone * This may look odd, but it is using save-and-enable 178065557Sjasone * semantics instead of the save-and-disable semantics 178165557Sjasone * that are used everywhere else. 178265557Sjasone */ 178372200Sbmilekic mtx_unlock_spin(&sio_lock); 178451078Speter incc = com->iptr - buf; 178551078Speter if (tp->t_rawq.c_cc + incc > tp->t_ihiwat 178651078Speter && (com->state & CS_RTS_IFLOW 178751078Speter || tp->t_iflag & IXOFF) 178851078Speter && !(tp->t_state & TS_TBLOCK)) 178951078Speter ttyblock(tp); 179051078Speter com->delta_error_counts[CE_TTY_BUF_OVERFLOW] 179151078Speter += b_to_q((char *)buf, incc, &tp->t_rawq); 179251078Speter buf += incc; 179351078Speter tk_nin += incc; 179451078Speter tk_rawcc += incc; 179551078Speter tp->t_rawcc += incc; 179651078Speter ttwakeup(tp); 179751078Speter if (tp->t_state & TS_TTSTOP 179851078Speter && (tp->t_iflag & IXANY 179951078Speter || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) { 180051078Speter tp->t_state &= ~TS_TTSTOP; 180151078Speter tp->t_lflag &= ~FLUSHO; 180251078Speter comstart(tp); 180351078Speter } 180472200Sbmilekic mtx_lock_spin(&sio_lock); 180551078Speter } while (buf < com->iptr); 180651078Speter } else { 180751078Speter do { 180865557Sjasone /* 180965557Sjasone * This may look odd, but it is using save-and-enable 181065557Sjasone * semantics instead of the save-and-disable semantics 181165557Sjasone * that are used everywhere else. 181265557Sjasone */ 181372200Sbmilekic mtx_unlock_spin(&sio_lock); 181451078Speter line_status = buf[com->ierroff]; 181551078Speter recv_data = *buf++; 181651078Speter if (line_status 181751078Speter & (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) { 181851078Speter if (line_status & LSR_BI) 181951078Speter recv_data |= TTY_BI; 182051078Speter if (line_status & LSR_FE) 182151078Speter recv_data |= TTY_FE; 182251078Speter if (line_status & LSR_OE) 182351078Speter recv_data |= TTY_OE; 182451078Speter if (line_status & LSR_PE) 182551078Speter recv_data |= TTY_PE; 182651078Speter } 182751078Speter (*linesw[tp->t_line].l_rint)(recv_data, tp); 182872200Sbmilekic mtx_lock_spin(&sio_lock); 182951078Speter } while (buf < com->iptr); 183051078Speter } 183151078Speter com_events -= (com->iptr - com->ibuf); 183251078Speter com->iptr = com->ibuf; 183351078Speter 183451078Speter /* 183551078Speter * There is now room for another low-level buffer full of input, 183651078Speter * so enable RTS if it is now disabled and there is room in the 183751078Speter * high-level buffer. 183851078Speter */ 183951078Speter if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & MCR_RTS) && 184051078Speter !(tp->t_state & TS_TBLOCK)) 184151078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 184251078Speter} 184351078Speter 184451078Spetervoid 184551078Spetersiointr(arg) 184651078Speter void *arg; 184751078Speter{ 184870174Sjhb struct com_s *com; 184970174Sjhb 185051078Speter#ifndef COM_MULTIPORT 185170174Sjhb com = (struct com_s *)arg; 185270174Sjhb 185372200Sbmilekic mtx_lock_spin(&sio_lock); 185470174Sjhb siointr1(com); 185572200Sbmilekic mtx_unlock_spin(&sio_lock); 185651078Speter#else /* COM_MULTIPORT */ 185751078Speter bool_t possibly_more_intrs; 185851078Speter int unit; 185951078Speter 186051078Speter /* 186151078Speter * Loop until there is no activity on any port. This is necessary 186251078Speter * to get an interrupt edge more than to avoid another interrupt. 186351078Speter * If the IRQ signal is just an OR of the IRQ signals from several 186451078Speter * devices, then the edge from one may be lost because another is 186551078Speter * on. 186651078Speter */ 186772200Sbmilekic mtx_lock_spin(&sio_lock); 186851078Speter do { 186951078Speter possibly_more_intrs = FALSE; 187053344Speter for (unit = 0; unit < sio_numunits; ++unit) { 187151078Speter com = com_addr(unit); 187251078Speter /* 187351078Speter * XXX COM_LOCK(); 187451078Speter * would it work here, or be counter-productive? 187551078Speter */ 187651078Speter if (com != NULL 187751078Speter && !com->gone 187851078Speter && (inb(com->int_id_port) & IIR_IMASK) 187951078Speter != IIR_NOPEND) { 188051078Speter siointr1(com); 188151078Speter possibly_more_intrs = TRUE; 188251078Speter } 188351078Speter /* XXX COM_UNLOCK(); */ 188451078Speter } 188551078Speter } while (possibly_more_intrs); 188672200Sbmilekic mtx_unlock_spin(&sio_lock); 188751078Speter#endif /* COM_MULTIPORT */ 188851078Speter} 188951078Speter 189051078Speterstatic void 189151078Spetersiointr1(com) 189251078Speter struct com_s *com; 189351078Speter{ 189451078Speter u_char line_status; 189551078Speter u_char modem_status; 189651078Speter u_char *ioptr; 189751078Speter u_char recv_data; 189851078Speter u_char int_ctl; 189951078Speter u_char int_ctl_new; 190051078Speter struct timecounter *tc; 190151078Speter u_int count; 190251078Speter 190351078Speter int_ctl = inb(com->intr_ctl_port); 190451078Speter int_ctl_new = int_ctl; 190551078Speter 190651078Speter while (!com->gone) { 190751078Speter if (com->pps.ppsparam.mode & PPS_CAPTUREBOTH) { 190851078Speter modem_status = inb(com->modem_status_port); 190951078Speter if ((modem_status ^ com->last_modem_status) & MSR_DCD) { 191051078Speter tc = timecounter; 191151078Speter count = tc->tc_get_timecount(tc); 191251078Speter pps_event(&com->pps, tc, count, 191351078Speter (modem_status & MSR_DCD) ? 191451078Speter PPS_CAPTUREASSERT : PPS_CAPTURECLEAR); 191551078Speter } 191651078Speter } 191751078Speter line_status = inb(com->line_status_port); 191851078Speter 191951078Speter /* input event? (check first to help avoid overruns) */ 192051078Speter while (line_status & LSR_RCV_MASK) { 192151078Speter /* break/unnattached error bits or real input? */ 192251078Speter if (!(line_status & LSR_RXRDY)) 192351078Speter recv_data = 0; 192451078Speter else 192551078Speter recv_data = inb(com->data_port); 192661649Sps#if defined(DDB) && defined(ALT_BREAK_TO_DEBUGGER) 192761649Sps /* 192861649Sps * Solaris implements a new BREAK which is initiated 192961649Sps * by a character sequence CR ~ ^b which is similar 193061649Sps * to a familiar pattern used on Sun servers by the 193161649Sps * Remote Console. 193261649Sps */ 193361649Sps#define KEY_CRTLB 2 /* ^B */ 193461649Sps#define KEY_CR 13 /* CR '\r' */ 193561649Sps#define KEY_TILDE 126 /* ~ */ 193661649Sps 193761649Sps if (com->unit == comconsole) { 193861649Sps static int brk_state1 = 0, brk_state2 = 0; 193961649Sps if (recv_data == KEY_CR) { 194061649Sps brk_state1 = recv_data; 194161649Sps brk_state2 = 0; 194265557Sjasone } else if (brk_state1 == KEY_CR 194365557Sjasone && (recv_data == KEY_TILDE 194465557Sjasone || recv_data == KEY_CRTLB)) { 194561649Sps if (recv_data == KEY_TILDE) 194661649Sps brk_state2 = recv_data; 194765557Sjasone else if (brk_state2 == KEY_TILDE 194865557Sjasone && recv_data == KEY_CRTLB) { 194961649Sps breakpoint(); 195065557Sjasone brk_state1 = 0; 195165557Sjasone brk_state2 = 0; 195261649Sps goto cont; 195361649Sps } else 195461649Sps brk_state2 = 0; 195561649Sps } else 195661649Sps brk_state1 = 0; 195761649Sps } 195861649Sps#endif 195951078Speter if (line_status & (LSR_BI | LSR_FE | LSR_PE)) { 196051078Speter /* 196151078Speter * Don't store BI if IGNBRK or FE/PE if IGNPAR. 196251078Speter * Otherwise, push the work to a higher level 196351078Speter * (to handle PARMRK) if we're bypassing. 196451078Speter * Otherwise, convert BI/FE and PE+INPCK to 0. 196551078Speter * 196651078Speter * This makes bypassing work right in the 196751078Speter * usual "raw" case (IGNBRK set, and IGNPAR 196851078Speter * and INPCK clear). 196951078Speter * 197051078Speter * Note: BI together with FE/PE means just BI. 197151078Speter */ 197251078Speter if (line_status & LSR_BI) { 197351078Speter#if defined(DDB) && defined(BREAK_TO_DEBUGGER) 197451078Speter if (com->unit == comconsole) { 197551078Speter breakpoint(); 197651078Speter goto cont; 197751078Speter } 197851078Speter#endif 197951078Speter if (com->tp == NULL 198051078Speter || com->tp->t_iflag & IGNBRK) 198151078Speter goto cont; 198251078Speter } else { 198351078Speter if (com->tp == NULL 198451078Speter || com->tp->t_iflag & IGNPAR) 198551078Speter goto cont; 198651078Speter } 198751078Speter if (com->tp->t_state & TS_CAN_BYPASS_L_RINT 198851078Speter && (line_status & (LSR_BI | LSR_FE) 198951078Speter || com->tp->t_iflag & INPCK)) 199051078Speter recv_data = 0; 199151078Speter } 199251078Speter ++com->bytes_in; 199351078Speter if (com->hotchar != 0 && recv_data == com->hotchar) 199472238Sjhb swi_sched(sio_fast_ih, SWI_NOSWITCH); 199551078Speter ioptr = com->iptr; 199651078Speter if (ioptr >= com->ibufend) 199751078Speter CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW); 199851078Speter else { 199951078Speter if (com->do_timestamp) 200051078Speter microtime(&com->timestamp); 200151078Speter ++com_events; 200272238Sjhb swi_sched(sio_slow_ih, SWI_DELAY); 200351078Speter#if 0 /* for testing input latency vs efficiency */ 200451078Speterif (com->iptr - com->ibuf == 8) 200572238Sjhb swi_sched(sio_fast_ih, SWI_NOSWITCH); 200651078Speter#endif 200751078Speter ioptr[0] = recv_data; 200851078Speter ioptr[com->ierroff] = line_status; 200951078Speter com->iptr = ++ioptr; 201051078Speter if (ioptr == com->ihighwater 201151078Speter && com->state & CS_RTS_IFLOW) 201251078Speter outb(com->modem_ctl_port, 201351078Speter com->mcr_image &= ~MCR_RTS); 201451078Speter if (line_status & LSR_OE) 201551078Speter CE_RECORD(com, CE_OVERRUN); 201651078Speter } 201751078Spetercont: 201851078Speter /* 201951078Speter * "& 0x7F" is to avoid the gcc-1.40 generating a slow 202051078Speter * jump from the top of the loop to here 202151078Speter */ 202251078Speter line_status = inb(com->line_status_port) & 0x7F; 202351078Speter } 202451078Speter 202551078Speter /* modem status change? (always check before doing output) */ 202651078Speter modem_status = inb(com->modem_status_port); 202751078Speter if (modem_status != com->last_modem_status) { 202851078Speter if (com->do_dcd_timestamp 202951078Speter && !(com->last_modem_status & MSR_DCD) 203051078Speter && modem_status & MSR_DCD) 203151078Speter microtime(&com->dcd_timestamp); 203251078Speter 203351078Speter /* 203451078Speter * Schedule high level to handle DCD changes. Note 203551078Speter * that we don't use the delta bits anywhere. Some 203651078Speter * UARTs mess them up, and it's easy to remember the 203751078Speter * previous bits and calculate the delta. 203851078Speter */ 203951078Speter com->last_modem_status = modem_status; 204051078Speter if (!(com->state & CS_CHECKMSR)) { 204151078Speter com_events += LOTS_OF_EVENTS; 204251078Speter com->state |= CS_CHECKMSR; 204372238Sjhb swi_sched(sio_fast_ih, SWI_NOSWITCH); 204451078Speter } 204551078Speter 204651078Speter /* handle CTS change immediately for crisp flow ctl */ 204751078Speter if (com->state & CS_CTS_OFLOW) { 204851078Speter if (modem_status & MSR_CTS) 204951078Speter com->state |= CS_ODEVREADY; 205051078Speter else 205151078Speter com->state &= ~CS_ODEVREADY; 205251078Speter } 205351078Speter } 205451078Speter 205551078Speter /* output queued and everything ready? */ 205651078Speter if (line_status & LSR_TXRDY 205751078Speter && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { 205851078Speter ioptr = com->obufq.l_head; 205951078Speter if (com->tx_fifo_size > 1) { 206051078Speter u_int ocount; 206151078Speter 206251078Speter ocount = com->obufq.l_tail - ioptr; 206351078Speter if (ocount > com->tx_fifo_size) 206451078Speter ocount = com->tx_fifo_size; 206551078Speter com->bytes_out += ocount; 206651078Speter do 206751078Speter outb(com->data_port, *ioptr++); 206851078Speter while (--ocount != 0); 206951078Speter } else { 207051078Speter outb(com->data_port, *ioptr++); 207151078Speter ++com->bytes_out; 207251078Speter } 207351078Speter com->obufq.l_head = ioptr; 207451078Speter if (COM_IIR_TXRDYBUG(com->flags)) { 207551078Speter int_ctl_new = int_ctl | IER_ETXRDY; 207651078Speter } 207751078Speter if (ioptr >= com->obufq.l_tail) { 207851078Speter struct lbq *qp; 207951078Speter 208051078Speter qp = com->obufq.l_next; 208151078Speter qp->l_queued = FALSE; 208251078Speter qp = qp->l_next; 208351078Speter if (qp != NULL) { 208451078Speter com->obufq.l_head = qp->l_head; 208551078Speter com->obufq.l_tail = qp->l_tail; 208651078Speter com->obufq.l_next = qp; 208751078Speter } else { 208851078Speter /* output just completed */ 208953344Speter if (COM_IIR_TXRDYBUG(com->flags)) { 209051078Speter int_ctl_new = int_ctl & ~IER_ETXRDY; 209151078Speter } 209251078Speter com->state &= ~CS_BUSY; 209351078Speter } 209451078Speter if (!(com->state & CS_ODONE)) { 209551078Speter com_events += LOTS_OF_EVENTS; 209651078Speter com->state |= CS_ODONE; 209767551Sjhb /* handle at high level ASAP */ 209872238Sjhb swi_sched(sio_fast_ih, SWI_NOSWITCH); 209951078Speter } 210051078Speter } 210153344Speter if (COM_IIR_TXRDYBUG(com->flags) && (int_ctl != int_ctl_new)) { 210251078Speter outb(com->intr_ctl_port, int_ctl_new); 210351078Speter } 210451078Speter } 210551078Speter 210651078Speter /* finished? */ 210751078Speter#ifndef COM_MULTIPORT 210851078Speter if ((inb(com->int_id_port) & IIR_IMASK) == IIR_NOPEND) 210951078Speter#endif /* COM_MULTIPORT */ 211051078Speter return; 211151078Speter } 211251078Speter} 211351078Speter 211451078Speterstatic int 211551078Spetersioioctl(dev, cmd, data, flag, p) 211651078Speter dev_t dev; 211751078Speter u_long cmd; 211851078Speter caddr_t data; 211951078Speter int flag; 212051078Speter struct proc *p; 212151078Speter{ 212251078Speter struct com_s *com; 212351078Speter int error; 212451078Speter int mynor; 212551078Speter int s; 212651078Speter struct tty *tp; 212751078Speter#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 212851078Speter u_long oldcmd; 212951078Speter struct termios term; 213051078Speter#endif 213151078Speter 213251078Speter mynor = minor(dev); 213351078Speter com = com_addr(MINOR_TO_UNIT(mynor)); 213457915Simp if (com == NULL || com->gone) 213551078Speter return (ENODEV); 213651078Speter if (mynor & CONTROL_MASK) { 213751078Speter struct termios *ct; 213851078Speter 213951078Speter switch (mynor & CONTROL_MASK) { 214051078Speter case CONTROL_INIT_STATE: 214151078Speter ct = mynor & CALLOUT_MASK ? &com->it_out : &com->it_in; 214251078Speter break; 214351078Speter case CONTROL_LOCK_STATE: 214451078Speter ct = mynor & CALLOUT_MASK ? &com->lt_out : &com->lt_in; 214551078Speter break; 214651078Speter default: 214751078Speter return (ENODEV); /* /dev/nodev */ 214851078Speter } 214951078Speter switch (cmd) { 215051078Speter case TIOCSETA: 215151078Speter error = suser(p); 215251078Speter if (error != 0) 215351078Speter return (error); 215451078Speter *ct = *(struct termios *)data; 215551078Speter return (0); 215651078Speter case TIOCGETA: 215751078Speter *(struct termios *)data = *ct; 215851078Speter return (0); 215951078Speter case TIOCGETD: 216051078Speter *(int *)data = TTYDISC; 216151078Speter return (0); 216251078Speter case TIOCGWINSZ: 216351078Speter bzero(data, sizeof(struct winsize)); 216451078Speter return (0); 216551078Speter default: 216651078Speter return (ENOTTY); 216751078Speter } 216851078Speter } 216951078Speter tp = com->tp; 217051078Speter#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 217151078Speter term = tp->t_termios; 217251078Speter oldcmd = cmd; 217351078Speter error = ttsetcompat(tp, &cmd, data, &term); 217451078Speter if (error != 0) 217551078Speter return (error); 217651078Speter if (cmd != oldcmd) 217751078Speter data = (caddr_t)&term; 217851078Speter#endif 217951078Speter if (cmd == TIOCSETA || cmd == TIOCSETAW || cmd == TIOCSETAF) { 218051078Speter int cc; 218151078Speter struct termios *dt = (struct termios *)data; 218251078Speter struct termios *lt = mynor & CALLOUT_MASK 218351078Speter ? &com->lt_out : &com->lt_in; 218451078Speter 218551078Speter dt->c_iflag = (tp->t_iflag & lt->c_iflag) 218651078Speter | (dt->c_iflag & ~lt->c_iflag); 218751078Speter dt->c_oflag = (tp->t_oflag & lt->c_oflag) 218851078Speter | (dt->c_oflag & ~lt->c_oflag); 218951078Speter dt->c_cflag = (tp->t_cflag & lt->c_cflag) 219051078Speter | (dt->c_cflag & ~lt->c_cflag); 219151078Speter dt->c_lflag = (tp->t_lflag & lt->c_lflag) 219251078Speter | (dt->c_lflag & ~lt->c_lflag); 219351078Speter for (cc = 0; cc < NCCS; ++cc) 219451078Speter if (lt->c_cc[cc] != 0) 219551078Speter dt->c_cc[cc] = tp->t_cc[cc]; 219651078Speter if (lt->c_ispeed != 0) 219751078Speter dt->c_ispeed = tp->t_ispeed; 219851078Speter if (lt->c_ospeed != 0) 219951078Speter dt->c_ospeed = tp->t_ospeed; 220051078Speter } 220151078Speter error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); 220251078Speter if (error != ENOIOCTL) 220351078Speter return (error); 220451078Speter s = spltty(); 220551078Speter error = ttioctl(tp, cmd, data, flag); 220651078Speter disc_optim(tp, &tp->t_termios, com); 220751078Speter if (error != ENOIOCTL) { 220851078Speter splx(s); 220951078Speter return (error); 221051078Speter } 221151078Speter switch (cmd) { 221251078Speter case TIOCSBRK: 221360471Snyan sio_setreg(com, com_cfcr, com->cfcr_image |= CFCR_SBREAK); 221451078Speter break; 221551078Speter case TIOCCBRK: 221660471Snyan sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 221751078Speter break; 221851078Speter case TIOCSDTR: 221951078Speter (void)commctl(com, TIOCM_DTR, DMBIS); 222051078Speter break; 222151078Speter case TIOCCDTR: 222251078Speter (void)commctl(com, TIOCM_DTR, DMBIC); 222351078Speter break; 222451078Speter /* 222551078Speter * XXX should disallow changing MCR_RTS if CS_RTS_IFLOW is set. The 222651078Speter * changes get undone on the next call to comparam(). 222751078Speter */ 222851078Speter case TIOCMSET: 222951078Speter (void)commctl(com, *(int *)data, DMSET); 223051078Speter break; 223151078Speter case TIOCMBIS: 223251078Speter (void)commctl(com, *(int *)data, DMBIS); 223351078Speter break; 223451078Speter case TIOCMBIC: 223551078Speter (void)commctl(com, *(int *)data, DMBIC); 223651078Speter break; 223751078Speter case TIOCMGET: 223851078Speter *(int *)data = commctl(com, 0, DMGET); 223951078Speter break; 224051078Speter case TIOCMSDTRWAIT: 224151078Speter /* must be root since the wait applies to following logins */ 224251078Speter error = suser(p); 224351078Speter if (error != 0) { 224451078Speter splx(s); 224551078Speter return (error); 224651078Speter } 224751078Speter com->dtr_wait = *(int *)data * hz / 100; 224851078Speter break; 224951078Speter case TIOCMGDTRWAIT: 225051078Speter *(int *)data = com->dtr_wait * 100 / hz; 225151078Speter break; 225251078Speter case TIOCTIMESTAMP: 225351078Speter com->do_timestamp = TRUE; 225451078Speter *(struct timeval *)data = com->timestamp; 225551078Speter break; 225651078Speter case TIOCDCDTIMESTAMP: 225751078Speter com->do_dcd_timestamp = TRUE; 225851078Speter *(struct timeval *)data = com->dcd_timestamp; 225951078Speter break; 226051078Speter default: 226151078Speter splx(s); 226251078Speter error = pps_ioctl(cmd, data, &com->pps); 226351078Speter if (error == ENODEV) 226451078Speter error = ENOTTY; 226551078Speter return (error); 226651078Speter } 226751078Speter splx(s); 226851078Speter return (0); 226951078Speter} 227051078Speter 227165557Sjasone/* software interrupt handler for SWI_TTY */ 227251078Speterstatic void 227367551Sjhbsiopoll(void *dummy) 227451078Speter{ 227551078Speter int unit; 227651078Speter 227751078Speter if (com_events == 0) 227851078Speter return; 227951078Speterrepeat: 228053344Speter for (unit = 0; unit < sio_numunits; ++unit) { 228151078Speter struct com_s *com; 228251078Speter int incc; 228351078Speter struct tty *tp; 228451078Speter 228551078Speter com = com_addr(unit); 228651078Speter if (com == NULL) 228751078Speter continue; 228851078Speter tp = com->tp; 228951078Speter if (tp == NULL || com->gone) { 229051078Speter /* 229151078Speter * Discard any events related to never-opened or 229251078Speter * going-away devices. 229351078Speter */ 229472200Sbmilekic mtx_lock_spin(&sio_lock); 229551078Speter incc = com->iptr - com->ibuf; 229651078Speter com->iptr = com->ibuf; 229751078Speter if (com->state & CS_CHECKMSR) { 229851078Speter incc += LOTS_OF_EVENTS; 229951078Speter com->state &= ~CS_CHECKMSR; 230051078Speter } 230151078Speter com_events -= incc; 230272200Sbmilekic mtx_unlock_spin(&sio_lock); 230351078Speter continue; 230451078Speter } 230551078Speter if (com->iptr != com->ibuf) { 230672200Sbmilekic mtx_lock_spin(&sio_lock); 230751078Speter sioinput(com); 230872200Sbmilekic mtx_unlock_spin(&sio_lock); 230951078Speter } 231051078Speter if (com->state & CS_CHECKMSR) { 231151078Speter u_char delta_modem_status; 231251078Speter 231372200Sbmilekic mtx_lock_spin(&sio_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; 231972200Sbmilekic mtx_unlock_spin(&sio_lock); 232051078Speter if (delta_modem_status & MSR_DCD) 232151078Speter (*linesw[tp->t_line].l_modem) 232251078Speter (tp, com->prev_modem_status & MSR_DCD); 232351078Speter } 232451078Speter if (com->state & CS_ODONE) { 232572200Sbmilekic mtx_lock_spin(&sio_lock); 232651078Speter com_events -= LOTS_OF_EVENTS; 232751078Speter com->state &= ~CS_ODONE; 232872200Sbmilekic mtx_unlock_spin(&sio_lock); 232951078Speter if (!(com->state & CS_BUSY) 233051078Speter && !(com->extra_state & CSE_BUSYCHECK)) { 233151078Speter timeout(siobusycheck, com, hz / 100); 233251078Speter com->extra_state |= CSE_BUSYCHECK; 233351078Speter } 233451078Speter (*linesw[tp->t_line].l_start)(tp); 233551078Speter } 233651078Speter if (com_events == 0) 233751078Speter break; 233851078Speter } 233951078Speter if (com_events >= LOTS_OF_EVENTS) 234051078Speter goto repeat; 234151078Speter} 234251078Speter 234351078Speterstatic int 234451078Spetercomparam(tp, t) 234551078Speter struct tty *tp; 234651078Speter struct termios *t; 234751078Speter{ 234851078Speter u_int cfcr; 234951078Speter int cflag; 235051078Speter struct com_s *com; 235151078Speter int divisor; 235251078Speter u_char dlbh; 235351078Speter u_char dlbl; 235451078Speter int s; 235551078Speter int unit; 235651078Speter 235751078Speter /* do historical conversions */ 235851078Speter if (t->c_ispeed == 0) 235951078Speter t->c_ispeed = t->c_ospeed; 236051078Speter 236151078Speter /* check requested parameters */ 236251078Speter divisor = ttspeedtab(t->c_ospeed, comspeedtab); 236351078Speter if (divisor < 0 || (divisor > 0 && t->c_ispeed != t->c_ospeed)) 236451078Speter return (EINVAL); 236551078Speter 236651078Speter /* parameters are OK, convert them to the com struct and the device */ 236751078Speter unit = DEV_TO_UNIT(tp->t_dev); 236851078Speter com = com_addr(unit); 236957915Simp if (com == NULL) 237057915Simp return (ENODEV); 237151078Speter s = spltty(); 237251078Speter if (divisor == 0) 237351078Speter (void)commctl(com, TIOCM_DTR, DMBIC); /* hang up line */ 237451078Speter else 237551078Speter (void)commctl(com, TIOCM_DTR, DMBIS); 237651078Speter cflag = t->c_cflag; 237751078Speter switch (cflag & CSIZE) { 237851078Speter case CS5: 237951078Speter cfcr = CFCR_5BITS; 238051078Speter break; 238151078Speter case CS6: 238251078Speter cfcr = CFCR_6BITS; 238351078Speter break; 238451078Speter case CS7: 238551078Speter cfcr = CFCR_7BITS; 238651078Speter break; 238751078Speter default: 238851078Speter cfcr = CFCR_8BITS; 238951078Speter break; 239051078Speter } 239151078Speter if (cflag & PARENB) { 239251078Speter cfcr |= CFCR_PENAB; 239351078Speter if (!(cflag & PARODD)) 239451078Speter cfcr |= CFCR_PEVEN; 239551078Speter } 239651078Speter if (cflag & CSTOPB) 239751078Speter cfcr |= CFCR_STOPB; 239851078Speter 239951078Speter if (com->hasfifo && divisor != 0) { 240051078Speter /* 240151078Speter * Use a fifo trigger level low enough so that the input 240251078Speter * latency from the fifo is less than about 16 msec and 240351078Speter * the total latency is less than about 30 msec. These 240451078Speter * latencies are reasonable for humans. Serial comms 240551078Speter * protocols shouldn't expect anything better since modem 240651078Speter * latencies are larger. 240751078Speter */ 240851078Speter com->fifo_image = t->c_ospeed <= 4800 240951078Speter ? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_HIGH; 241051078Speter#ifdef COM_ESP 241151078Speter /* 241251078Speter * The Hayes ESP card needs the fifo DMA mode bit set 241351078Speter * in compatibility mode. If not, it will interrupt 241451078Speter * for each character received. 241551078Speter */ 241651078Speter if (com->esp) 241751078Speter com->fifo_image |= FIFO_DMA_MODE; 241851078Speter#endif 241960471Snyan sio_setreg(com, com_fifo, com->fifo_image); 242051078Speter } 242151078Speter 242265605Sjhb /* 242365605Sjhb * This returns with interrupts disabled so that we can complete 242465605Sjhb * the speed change atomically. Keeping interrupts disabled is 242565605Sjhb * especially important while com_data is hidden. 242665605Sjhb */ 242765605Sjhb (void) siosetwater(com, t->c_ispeed); 242865557Sjasone 242951078Speter if (divisor != 0) { 243060471Snyan sio_setreg(com, com_cfcr, cfcr | CFCR_DLAB); 243151078Speter /* 243251078Speter * Only set the divisor registers if they would change, 243351078Speter * since on some 16550 incompatibles (UMC8669F), setting 243451078Speter * them while input is arriving them loses sync until 243551078Speter * data stops arriving. 243651078Speter */ 243751078Speter dlbl = divisor & 0xFF; 243860471Snyan if (sio_getreg(com, com_dlbl) != dlbl) 243960471Snyan sio_setreg(com, com_dlbl, dlbl); 244051078Speter dlbh = (u_int) divisor >> 8; 244160471Snyan if (sio_getreg(com, com_dlbh) != dlbh) 244260471Snyan sio_setreg(com, com_dlbh, dlbh); 244351078Speter } 244451078Speter 244560471Snyan sio_setreg(com, com_cfcr, com->cfcr_image = cfcr); 244651078Speter 244751078Speter if (!(tp->t_state & TS_TTSTOP)) 244851078Speter com->state |= CS_TTGO; 244951078Speter 245051078Speter if (cflag & CRTS_IFLOW) { 245151078Speter if (com->st16650a) { 245260471Snyan sio_setreg(com, com_cfcr, 0xbf); 245360471Snyan sio_setreg(com, com_fifo, 245460471Snyan sio_getreg(com, com_fifo) | 0x40); 245551078Speter } 245651078Speter com->state |= CS_RTS_IFLOW; 245751078Speter /* 245851078Speter * If CS_RTS_IFLOW just changed from off to on, the change 245951078Speter * needs to be propagated to MCR_RTS. This isn't urgent, 246051078Speter * so do it later by calling comstart() instead of repeating 246151078Speter * a lot of code from comstart() here. 246251078Speter */ 246351078Speter } else if (com->state & CS_RTS_IFLOW) { 246451078Speter com->state &= ~CS_RTS_IFLOW; 246551078Speter /* 246651078Speter * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS 246751078Speter * on here, since comstart() won't do it later. 246851078Speter */ 246951078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 247051078Speter if (com->st16650a) { 247160471Snyan sio_setreg(com, com_cfcr, 0xbf); 247260471Snyan sio_setreg(com, com_fifo, 247360471Snyan sio_getreg(com, com_fifo) & ~0x40); 247451078Speter } 247551078Speter } 247651078Speter 247751078Speter 247851078Speter /* 247951078Speter * Set up state to handle output flow control. 248051078Speter * XXX - worth handling MDMBUF (DCD) flow control at the lowest level? 248151078Speter * Now has 10+ msec latency, while CTS flow has 50- usec latency. 248251078Speter */ 248351078Speter com->state |= CS_ODEVREADY; 248451078Speter com->state &= ~CS_CTS_OFLOW; 248551078Speter if (cflag & CCTS_OFLOW) { 248651078Speter com->state |= CS_CTS_OFLOW; 248751078Speter if (!(com->last_modem_status & MSR_CTS)) 248851078Speter com->state &= ~CS_ODEVREADY; 248951078Speter if (com->st16650a) { 249060471Snyan sio_setreg(com, com_cfcr, 0xbf); 249160471Snyan sio_setreg(com, com_fifo, 249260471Snyan sio_getreg(com, com_fifo) | 0x80); 249351078Speter } 249451078Speter } else { 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 } 250151078Speter 250260471Snyan sio_setreg(com, com_cfcr, com->cfcr_image); 250351078Speter 250451078Speter /* XXX shouldn't call functions while intrs are disabled. */ 250551078Speter disc_optim(tp, t, com); 250651078Speter /* 250751078Speter * Recover from fiddling with CS_TTGO. We used to call siointr1() 250851078Speter * unconditionally, but that defeated the careful discarding of 250951078Speter * stale input in sioopen(). 251051078Speter */ 251151078Speter if (com->state >= (CS_BUSY | CS_TTGO)) 251251078Speter siointr1(com); 251351078Speter 251472200Sbmilekic mtx_unlock_spin(&sio_lock); 251551078Speter splx(s); 251651078Speter comstart(tp); 251751078Speter if (com->ibufold != NULL) { 251851078Speter free(com->ibufold, M_DEVBUF); 251951078Speter com->ibufold = NULL; 252051078Speter } 252151078Speter return (0); 252251078Speter} 252351078Speter 252465605Sjhb/* 252570174Sjhb * This function must be called with the sio_lock mutex released and will 252670174Sjhb * return with it obtained. 252765605Sjhb */ 252851078Speterstatic int 252965605Sjhbsiosetwater(com, speed) 253051078Speter struct com_s *com; 253151078Speter speed_t speed; 253251078Speter{ 253351078Speter int cp4ticks; 253451078Speter u_char *ibuf; 253551078Speter int ibufsize; 253651078Speter struct tty *tp; 253751078Speter 253851078Speter /* 253951078Speter * Make the buffer size large enough to handle a softtty interrupt 254051078Speter * latency of about 2 ticks without loss of throughput or data 254151078Speter * (about 3 ticks if input flow control is not used or not honoured, 254251078Speter * but a bit less for CS5-CS7 modes). 254351078Speter */ 254451078Speter cp4ticks = speed / 10 / hz * 4; 254551078Speter for (ibufsize = 128; ibufsize < cp4ticks;) 254651078Speter ibufsize <<= 1; 254765605Sjhb if (ibufsize == com->ibufsize) { 254872200Sbmilekic mtx_lock_spin(&sio_lock); 254951078Speter return (0); 255065605Sjhb } 255151078Speter 255251078Speter /* 255351078Speter * Allocate input buffer. The extra factor of 2 in the size is 255451078Speter * to allow for an error byte for each input byte. 255551078Speter */ 255651078Speter ibuf = malloc(2 * ibufsize, M_DEVBUF, M_NOWAIT); 255765605Sjhb if (ibuf == NULL) { 255872200Sbmilekic mtx_lock_spin(&sio_lock); 255951078Speter return (ENOMEM); 256065605Sjhb } 256151078Speter 256251078Speter /* Initialize non-critical variables. */ 256351078Speter com->ibufold = com->ibuf; 256451078Speter com->ibufsize = ibufsize; 256551078Speter tp = com->tp; 256651078Speter if (tp != NULL) { 256751078Speter tp->t_ififosize = 2 * ibufsize; 256851078Speter tp->t_ispeedwat = (speed_t)-1; 256951078Speter tp->t_ospeedwat = (speed_t)-1; 257051078Speter } 257151078Speter 257251078Speter /* 257351078Speter * Read current input buffer, if any. Continue with interrupts 257451078Speter * disabled. 257551078Speter */ 257672200Sbmilekic mtx_lock_spin(&sio_lock); 257751078Speter if (com->iptr != com->ibuf) 257851078Speter sioinput(com); 257951078Speter 258051078Speter /*- 258151078Speter * Initialize critical variables, including input buffer watermarks. 258251078Speter * The external device is asked to stop sending when the buffer 258351078Speter * exactly reaches high water, or when the high level requests it. 258451078Speter * The high level is notified immediately (rather than at a later 258551078Speter * clock tick) when this watermark is reached. 258651078Speter * The buffer size is chosen so the watermark should almost never 258751078Speter * be reached. 258851078Speter * The low watermark is invisibly 0 since the buffer is always 258951078Speter * emptied all at once. 259051078Speter */ 259151078Speter com->iptr = com->ibuf = ibuf; 259251078Speter com->ibufend = ibuf + ibufsize; 259351078Speter com->ierroff = ibufsize; 259451078Speter com->ihighwater = ibuf + 3 * ibufsize / 4; 259551078Speter return (0); 259651078Speter} 259751078Speter 259851078Speterstatic void 259951078Spetercomstart(tp) 260051078Speter struct tty *tp; 260151078Speter{ 260251078Speter struct com_s *com; 260351078Speter int s; 260451078Speter int unit; 260551078Speter 260651078Speter unit = DEV_TO_UNIT(tp->t_dev); 260751078Speter com = com_addr(unit); 260857915Simp if (com == NULL) 260957915Simp return; 261051078Speter s = spltty(); 261172200Sbmilekic mtx_lock_spin(&sio_lock); 261251078Speter if (tp->t_state & TS_TTSTOP) 261351078Speter com->state &= ~CS_TTGO; 261451078Speter else 261551078Speter com->state |= CS_TTGO; 261651078Speter if (tp->t_state & TS_TBLOCK) { 261751078Speter if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW) 261851078Speter outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); 261951078Speter } else { 262051078Speter if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater 262151078Speter && com->state & CS_RTS_IFLOW) 262251078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 262351078Speter } 262472200Sbmilekic mtx_unlock_spin(&sio_lock); 262551078Speter if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { 262651078Speter ttwwakeup(tp); 262751078Speter splx(s); 262851078Speter return; 262951078Speter } 263051078Speter if (tp->t_outq.c_cc != 0) { 263151078Speter struct lbq *qp; 263251078Speter struct lbq *next; 263351078Speter 263451078Speter if (!com->obufs[0].l_queued) { 263551078Speter com->obufs[0].l_tail 263651078Speter = com->obuf1 + q_to_b(&tp->t_outq, com->obuf1, 263751078Speter sizeof com->obuf1); 263851078Speter com->obufs[0].l_next = NULL; 263951078Speter com->obufs[0].l_queued = TRUE; 264072200Sbmilekic mtx_lock_spin(&sio_lock); 264151078Speter if (com->state & CS_BUSY) { 264251078Speter qp = com->obufq.l_next; 264351078Speter while ((next = qp->l_next) != NULL) 264451078Speter qp = next; 264551078Speter qp->l_next = &com->obufs[0]; 264651078Speter } else { 264751078Speter com->obufq.l_head = com->obufs[0].l_head; 264851078Speter com->obufq.l_tail = com->obufs[0].l_tail; 264951078Speter com->obufq.l_next = &com->obufs[0]; 265051078Speter com->state |= CS_BUSY; 265151078Speter } 265272200Sbmilekic mtx_unlock_spin(&sio_lock); 265351078Speter } 265451078Speter if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) { 265551078Speter com->obufs[1].l_tail 265651078Speter = com->obuf2 + q_to_b(&tp->t_outq, com->obuf2, 265751078Speter sizeof com->obuf2); 265851078Speter com->obufs[1].l_next = NULL; 265951078Speter com->obufs[1].l_queued = TRUE; 266072200Sbmilekic mtx_lock_spin(&sio_lock); 266151078Speter if (com->state & CS_BUSY) { 266251078Speter qp = com->obufq.l_next; 266351078Speter while ((next = qp->l_next) != NULL) 266451078Speter qp = next; 266551078Speter qp->l_next = &com->obufs[1]; 266651078Speter } else { 266751078Speter com->obufq.l_head = com->obufs[1].l_head; 266851078Speter com->obufq.l_tail = com->obufs[1].l_tail; 266951078Speter com->obufq.l_next = &com->obufs[1]; 267051078Speter com->state |= CS_BUSY; 267151078Speter } 267272200Sbmilekic mtx_unlock_spin(&sio_lock); 267351078Speter } 267451078Speter tp->t_state |= TS_BUSY; 267551078Speter } 267672200Sbmilekic mtx_lock_spin(&sio_lock); 267751078Speter if (com->state >= (CS_BUSY | CS_TTGO)) 267851078Speter siointr1(com); /* fake interrupt to start output */ 267972200Sbmilekic mtx_unlock_spin(&sio_lock); 268051078Speter ttwwakeup(tp); 268151078Speter splx(s); 268251078Speter} 268351078Speter 268451078Speterstatic void 268551654Sphkcomstop(tp, rw) 268651078Speter struct tty *tp; 268751078Speter int rw; 268851078Speter{ 268951078Speter struct com_s *com; 269051078Speter 269151078Speter com = com_addr(DEV_TO_UNIT(tp->t_dev)); 269257915Simp if (com == NULL || com->gone) 269351078Speter return; 269472200Sbmilekic mtx_lock_spin(&sio_lock); 269551078Speter if (rw & FWRITE) { 269651078Speter if (com->hasfifo) 269751078Speter#ifdef COM_ESP 269851078Speter /* XXX avoid h/w bug. */ 269951078Speter if (!com->esp) 270051078Speter#endif 270160471Snyan sio_setreg(com, com_fifo, 270260471Snyan FIFO_XMT_RST | com->fifo_image); 270351078Speter com->obufs[0].l_queued = FALSE; 270451078Speter com->obufs[1].l_queued = FALSE; 270551078Speter if (com->state & CS_ODONE) 270651078Speter com_events -= LOTS_OF_EVENTS; 270751078Speter com->state &= ~(CS_ODONE | CS_BUSY); 270851078Speter com->tp->t_state &= ~TS_BUSY; 270951078Speter } 271051078Speter if (rw & FREAD) { 271151078Speter if (com->hasfifo) 271251078Speter#ifdef COM_ESP 271351078Speter /* XXX avoid h/w bug. */ 271451078Speter if (!com->esp) 271551078Speter#endif 271660471Snyan sio_setreg(com, com_fifo, 271760471Snyan FIFO_RCV_RST | com->fifo_image); 271851078Speter com_events -= (com->iptr - com->ibuf); 271951078Speter com->iptr = com->ibuf; 272051078Speter } 272172200Sbmilekic mtx_unlock_spin(&sio_lock); 272251078Speter comstart(tp); 272351078Speter} 272451078Speter 272551078Speterstatic int 272651078Spetercommctl(com, bits, how) 272751078Speter struct com_s *com; 272851078Speter int bits; 272951078Speter int how; 273051078Speter{ 273151078Speter int mcr; 273251078Speter int msr; 273351078Speter 273451078Speter if (how == DMGET) { 273551078Speter bits = TIOCM_LE; /* XXX - always enabled while open */ 273651078Speter mcr = com->mcr_image; 273751078Speter if (mcr & MCR_DTR) 273851078Speter bits |= TIOCM_DTR; 273951078Speter if (mcr & MCR_RTS) 274051078Speter bits |= TIOCM_RTS; 274151078Speter msr = com->prev_modem_status; 274251078Speter if (msr & MSR_CTS) 274351078Speter bits |= TIOCM_CTS; 274451078Speter if (msr & MSR_DCD) 274551078Speter bits |= TIOCM_CD; 274651078Speter if (msr & MSR_DSR) 274751078Speter bits |= TIOCM_DSR; 274851078Speter /* 274951078Speter * XXX - MSR_RI is naturally volatile, and we make MSR_TERI 275051078Speter * more volatile by reading the modem status a lot. Perhaps 275151078Speter * we should latch both bits until the status is read here. 275251078Speter */ 275351078Speter if (msr & (MSR_RI | MSR_TERI)) 275451078Speter bits |= TIOCM_RI; 275551078Speter return (bits); 275651078Speter } 275751078Speter mcr = 0; 275851078Speter if (bits & TIOCM_DTR) 275951078Speter mcr |= MCR_DTR; 276051078Speter if (bits & TIOCM_RTS) 276151078Speter mcr |= MCR_RTS; 276251078Speter if (com->gone) 276351078Speter return(0); 276472200Sbmilekic mtx_lock_spin(&sio_lock); 276551078Speter switch (how) { 276651078Speter case DMSET: 276751078Speter outb(com->modem_ctl_port, 276851078Speter com->mcr_image = mcr | (com->mcr_image & MCR_IENABLE)); 276951078Speter break; 277051078Speter case DMBIS: 277151078Speter outb(com->modem_ctl_port, com->mcr_image |= mcr); 277251078Speter break; 277351078Speter case DMBIC: 277451078Speter outb(com->modem_ctl_port, com->mcr_image &= ~mcr); 277551078Speter break; 277651078Speter } 277772200Sbmilekic mtx_unlock_spin(&sio_lock); 277851078Speter return (0); 277951078Speter} 278051078Speter 278151078Speterstatic void 278251078Spetersiosettimeout() 278351078Speter{ 278451078Speter struct com_s *com; 278551078Speter bool_t someopen; 278651078Speter int unit; 278751078Speter 278851078Speter /* 278951078Speter * Set our timeout period to 1 second if no polled devices are open. 279051078Speter * Otherwise set it to max(1/200, 1/hz). 279151078Speter * Enable timeouts iff some device is open. 279251078Speter */ 279351078Speter untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 279451078Speter sio_timeout = hz; 279551078Speter someopen = FALSE; 279653344Speter for (unit = 0; unit < sio_numunits; ++unit) { 279751078Speter com = com_addr(unit); 279851078Speter if (com != NULL && com->tp != NULL 279951078Speter && com->tp->t_state & TS_ISOPEN && !com->gone) { 280051078Speter someopen = TRUE; 280151078Speter if (com->poll || com->poll_output) { 280251078Speter sio_timeout = hz > 200 ? hz / 200 : 1; 280351078Speter break; 280451078Speter } 280551078Speter } 280651078Speter } 280751078Speter if (someopen) { 280851078Speter sio_timeouts_until_log = hz / sio_timeout; 280951078Speter sio_timeout_handle = timeout(comwakeup, (void *)NULL, 281051078Speter sio_timeout); 281151078Speter } else { 281251078Speter /* Flush error messages, if any. */ 281351078Speter sio_timeouts_until_log = 1; 281451078Speter comwakeup((void *)NULL); 281551078Speter untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 281651078Speter } 281751078Speter} 281851078Speter 281951078Speterstatic void 282051078Spetercomwakeup(chan) 282151078Speter void *chan; 282251078Speter{ 282351078Speter struct com_s *com; 282451078Speter int unit; 282551078Speter 282651078Speter sio_timeout_handle = timeout(comwakeup, (void *)NULL, sio_timeout); 282751078Speter 282851078Speter /* 282951078Speter * Recover from lost output interrupts. 283051078Speter * Poll any lines that don't use interrupts. 283151078Speter */ 283253344Speter for (unit = 0; unit < sio_numunits; ++unit) { 283351078Speter com = com_addr(unit); 283451078Speter if (com != NULL && !com->gone 283551078Speter && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) { 283672200Sbmilekic mtx_lock_spin(&sio_lock); 283751078Speter siointr1(com); 283872200Sbmilekic mtx_unlock_spin(&sio_lock); 283951078Speter } 284051078Speter } 284151078Speter 284251078Speter /* 284351078Speter * Check for and log errors, but not too often. 284451078Speter */ 284551078Speter if (--sio_timeouts_until_log > 0) 284651078Speter return; 284751078Speter sio_timeouts_until_log = hz / sio_timeout; 284853344Speter for (unit = 0; unit < sio_numunits; ++unit) { 284951078Speter int errnum; 285051078Speter 285151078Speter com = com_addr(unit); 285251078Speter if (com == NULL) 285351078Speter continue; 285451078Speter if (com->gone) 285551078Speter continue; 285651078Speter for (errnum = 0; errnum < CE_NTYPES; ++errnum) { 285751078Speter u_int delta; 285851078Speter u_long total; 285951078Speter 286072200Sbmilekic mtx_lock_spin(&sio_lock); 286151078Speter delta = com->delta_error_counts[errnum]; 286251078Speter com->delta_error_counts[errnum] = 0; 286372200Sbmilekic mtx_unlock_spin(&sio_lock); 286451078Speter if (delta == 0) 286551078Speter continue; 286651078Speter total = com->error_counts[errnum] += delta; 286751078Speter log(LOG_ERR, "sio%d: %u more %s%s (total %lu)\n", 286851078Speter unit, delta, error_desc[errnum], 286951078Speter delta == 1 ? "" : "s", total); 287051078Speter } 287151078Speter } 287251078Speter} 287351078Speter 287451078Speterstatic void 287551078Speterdisc_optim(tp, t, com) 287651078Speter struct tty *tp; 287751078Speter struct termios *t; 287851078Speter struct com_s *com; 287951078Speter{ 288051078Speter if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON)) 288151078Speter && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK)) 288251078Speter && (!(t->c_iflag & PARMRK) 288351078Speter || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK)) 288451078Speter && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN)) 288551078Speter && linesw[tp->t_line].l_rint == ttyinput) 288651078Speter tp->t_state |= TS_CAN_BYPASS_L_RINT; 288751078Speter else 288851078Speter tp->t_state &= ~TS_CAN_BYPASS_L_RINT; 288951078Speter com->hotchar = linesw[tp->t_line].l_hotchar; 289051078Speter} 289151078Speter 289251078Speter/* 289351078Speter * Following are all routines needed for SIO to act as console 289451078Speter */ 289551078Speter#include <sys/cons.h> 289651078Speter 289751078Speterstruct siocnstate { 289851078Speter u_char dlbl; 289951078Speter u_char dlbh; 290051078Speter u_char ier; 290151078Speter u_char cfcr; 290251078Speter u_char mcr; 290351078Speter}; 290451078Speter 290566230Sjhb#ifndef __alpha__ 290651078Speterstatic speed_t siocngetspeed __P((Port_t, struct speedtab *)); 290766230Sjhb#endif 290851078Speterstatic void siocnclose __P((struct siocnstate *sp, Port_t iobase)); 290951078Speterstatic void siocnopen __P((struct siocnstate *sp, Port_t iobase, int speed)); 291051078Speterstatic void siocntxwait __P((Port_t iobase)); 291151078Speter 291266230Sjhb#ifdef __alpha__ 291366230Sjhbint siocnattach __P((int port, int speed)); 291466230Sjhbint siogdbattach __P((int port, int speed)); 291566230Sjhbint siogdbgetc __P((void)); 291666230Sjhbvoid siogdbputc __P((int c)); 291766230Sjhb#else 291851078Speterstatic cn_probe_t siocnprobe; 291951078Speterstatic cn_init_t siocninit; 292066230Sjhb#endif 292151078Speterstatic cn_checkc_t siocncheckc; 292251078Speterstatic cn_getc_t siocngetc; 292351078Speterstatic cn_putc_t siocnputc; 292451078Speter 292551078Speter#ifdef __i386__ 292655823SyokotaCONS_DRIVER(sio, siocnprobe, siocninit, NULL, siocngetc, siocncheckc, 292755823Syokota siocnputc, NULL); 292851078Speter#endif 292951078Speter 293051078Speter/* To get the GDB related variables */ 293151078Speter#if DDB > 0 293251078Speter#include <ddb/ddb.h> 293351078Speter#endif 293451078Speter 293551078Speterstatic void 293651078Spetersiocntxwait(iobase) 293751078Speter Port_t iobase; 293851078Speter{ 293951078Speter int timo; 294051078Speter 294151078Speter /* 294251078Speter * Wait for any pending transmission to finish. Required to avoid 294351078Speter * the UART lockup bug when the speed is changed, and for normal 294451078Speter * transmits. 294551078Speter */ 294651078Speter timo = 100000; 294751078Speter while ((inb(iobase + com_lsr) & (LSR_TSRE | LSR_TXRDY)) 294851078Speter != (LSR_TSRE | LSR_TXRDY) && --timo != 0) 294951078Speter ; 295051078Speter} 295151078Speter 295266230Sjhb#ifndef __alpha__ 295366230Sjhb 295451078Speter/* 295551078Speter * Read the serial port specified and try to figure out what speed 295651078Speter * it's currently running at. We're assuming the serial port has 295751078Speter * been initialized and is basicly idle. This routine is only intended 295851078Speter * to be run at system startup. 295951078Speter * 296051078Speter * If the value read from the serial port doesn't make sense, return 0. 296151078Speter */ 296251078Speter 296351078Speterstatic speed_t 296451078Spetersiocngetspeed(iobase, table) 296551078Speter Port_t iobase; 296651078Speter struct speedtab *table; 296751078Speter{ 296851078Speter int code; 296951078Speter u_char dlbh; 297051078Speter u_char dlbl; 297151078Speter u_char cfcr; 297251078Speter 297351078Speter cfcr = inb(iobase + com_cfcr); 297451078Speter outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 297551078Speter 297651078Speter dlbl = inb(iobase + com_dlbl); 297751078Speter dlbh = inb(iobase + com_dlbh); 297851078Speter 297951078Speter outb(iobase + com_cfcr, cfcr); 298051078Speter 298151078Speter code = dlbh << 8 | dlbl; 298251078Speter 298353344Speter for (; table->sp_speed != -1; table++) 298451078Speter if (table->sp_code == code) 298551078Speter return (table->sp_speed); 298651078Speter 298758885Simp return (0); /* didn't match anything sane */ 298851078Speter} 298951078Speter 299066230Sjhb#endif 299166230Sjhb 299251078Speterstatic void 299351078Spetersiocnopen(sp, iobase, speed) 299451078Speter struct siocnstate *sp; 299551078Speter Port_t iobase; 299651078Speter int speed; 299751078Speter{ 299851078Speter int divisor; 299951078Speter u_char dlbh; 300051078Speter u_char dlbl; 300151078Speter 300251078Speter /* 300351078Speter * Save all the device control registers except the fifo register 300451078Speter * and set our default ones (cs8 -parenb speed=comdefaultrate). 300551078Speter * We can't save the fifo register since it is read-only. 300651078Speter */ 300751078Speter sp->ier = inb(iobase + com_ier); 300851078Speter outb(iobase + com_ier, 0); /* spltty() doesn't stop siointr() */ 300951078Speter siocntxwait(iobase); 301051078Speter sp->cfcr = inb(iobase + com_cfcr); 301151078Speter outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 301251078Speter sp->dlbl = inb(iobase + com_dlbl); 301351078Speter sp->dlbh = inb(iobase + com_dlbh); 301451078Speter /* 301551078Speter * Only set the divisor registers if they would change, since on 301651078Speter * some 16550 incompatibles (Startech), setting them clears the 301751078Speter * data input register. This also reduces the effects of the 301851078Speter * UMC8669F bug. 301951078Speter */ 302051078Speter divisor = ttspeedtab(speed, comspeedtab); 302151078Speter dlbl = divisor & 0xFF; 302251078Speter if (sp->dlbl != dlbl) 302351078Speter outb(iobase + com_dlbl, dlbl); 302451078Speter dlbh = (u_int) divisor >> 8; 302551078Speter if (sp->dlbh != dlbh) 302651078Speter outb(iobase + com_dlbh, dlbh); 302751078Speter outb(iobase + com_cfcr, CFCR_8BITS); 302851078Speter sp->mcr = inb(iobase + com_mcr); 302951078Speter /* 303051078Speter * We don't want interrupts, but must be careful not to "disable" 303151078Speter * them by clearing the MCR_IENABLE bit, since that might cause 303251078Speter * an interrupt by floating the IRQ line. 303351078Speter */ 303451078Speter outb(iobase + com_mcr, (sp->mcr & MCR_IENABLE) | MCR_DTR | MCR_RTS); 303551078Speter} 303651078Speter 303751078Speterstatic void 303851078Spetersiocnclose(sp, iobase) 303951078Speter struct siocnstate *sp; 304051078Speter Port_t iobase; 304151078Speter{ 304251078Speter /* 304351078Speter * Restore the device control registers. 304451078Speter */ 304551078Speter siocntxwait(iobase); 304651078Speter outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 304751078Speter if (sp->dlbl != inb(iobase + com_dlbl)) 304851078Speter outb(iobase + com_dlbl, sp->dlbl); 304951078Speter if (sp->dlbh != inb(iobase + com_dlbh)) 305051078Speter outb(iobase + com_dlbh, sp->dlbh); 305151078Speter outb(iobase + com_cfcr, sp->cfcr); 305251078Speter /* 305351078Speter * XXX damp oscillations of MCR_DTR and MCR_RTS by not restoring them. 305451078Speter */ 305551078Speter outb(iobase + com_mcr, sp->mcr | MCR_DTR | MCR_RTS); 305651078Speter outb(iobase + com_ier, sp->ier); 305751078Speter} 305851078Speter 305966230Sjhb#ifndef __alpha__ 306066230Sjhb 306151078Speterstatic void 306251078Spetersiocnprobe(cp) 306351078Speter struct consdev *cp; 306451078Speter{ 306551078Speter speed_t boot_speed; 306651078Speter u_char cfcr; 306751078Speter int s, unit; 306851078Speter struct siocnstate sp; 306951078Speter 307051078Speter /* 307151078Speter * Find our first enabled console, if any. If it is a high-level 307251078Speter * console device, then initialize it and return successfully. 307351078Speter * If it is a low-level console device, then initialize it and 307451078Speter * return unsuccessfully. It must be initialized in both cases 307551078Speter * for early use by console drivers and debuggers. Initializing 307651078Speter * the hardware is not necessary in all cases, since the i/o 307751078Speter * routines initialize it on the fly, but it is necessary if 307851078Speter * input might arrive while the hardware is switched back to an 307951078Speter * uninitialized state. We can't handle multiple console devices 308051078Speter * yet because our low-level routines don't take a device arg. 308151078Speter * We trust the user to set the console flags properly so that we 308251078Speter * don't need to probe. 308351078Speter */ 308451078Speter cp->cn_pri = CN_DEAD; 308551078Speter 308651078Speter for (unit = 0; unit < 16; unit++) { /* XXX need to know how many */ 308751078Speter int flags; 308851078Speter int disabled; 308951078Speter if (resource_int_value("sio", unit, "disabled", &disabled) == 0) { 309051078Speter if (disabled) 309151078Speter continue; 309251078Speter } 309351078Speter if (resource_int_value("sio", unit, "flags", &flags)) 309451078Speter continue; 309551078Speter if (COM_CONSOLE(flags) || COM_DEBUGGER(flags)) { 309651078Speter int port; 309751078Speter Port_t iobase; 309851078Speter 309951078Speter if (resource_int_value("sio", unit, "port", &port)) 310051078Speter continue; 310151078Speter iobase = port; 310251078Speter s = spltty(); 310351078Speter if (boothowto & RB_SERIAL) { 310451078Speter boot_speed = siocngetspeed(iobase, comspeedtab); 310551078Speter if (boot_speed) 310651078Speter comdefaultrate = boot_speed; 310751078Speter } 310851078Speter 310951078Speter /* 311051078Speter * Initialize the divisor latch. We can't rely on 311151078Speter * siocnopen() to do this the first time, since it 311251078Speter * avoids writing to the latch if the latch appears 311351078Speter * to have the correct value. Also, if we didn't 311451078Speter * just read the speed from the hardware, then we 311551078Speter * need to set the speed in hardware so that 311651078Speter * switching it later is null. 311751078Speter */ 311851078Speter cfcr = inb(iobase + com_cfcr); 311951078Speter outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 312051078Speter outb(iobase + com_dlbl, 312151078Speter COMBRD(comdefaultrate) & 0xff); 312251078Speter outb(iobase + com_dlbh, 312351078Speter (u_int) COMBRD(comdefaultrate) >> 8); 312451078Speter outb(iobase + com_cfcr, cfcr); 312551078Speter 312651078Speter siocnopen(&sp, iobase, comdefaultrate); 312751078Speter 312851078Speter splx(s); 312951078Speter if (COM_CONSOLE(flags) && !COM_LLCONSOLE(flags)) { 313051078Speter cp->cn_dev = makedev(CDEV_MAJOR, unit); 313151078Speter cp->cn_pri = COM_FORCECONSOLE(flags) 313251078Speter || boothowto & RB_SERIAL 313351078Speter ? CN_REMOTE : CN_NORMAL; 313451078Speter siocniobase = iobase; 313551078Speter siocnunit = unit; 313651078Speter } 313751078Speter if (COM_DEBUGGER(flags)) { 313851078Speter printf("sio%d: gdb debugging port\n", unit); 313951078Speter siogdbiobase = iobase; 314051078Speter siogdbunit = unit; 314151078Speter#if DDB > 0 314251078Speter gdbdev = makedev(CDEV_MAJOR, unit); 314351078Speter gdb_getc = siocngetc; 314451078Speter gdb_putc = siocnputc; 314551078Speter#endif 314651078Speter } 314751078Speter } 314851078Speter } 314951078Speter#ifdef __i386__ 315051078Speter#if DDB > 0 315151078Speter /* 315251078Speter * XXX Ugly Compatability. 315351078Speter * If no gdb port has been specified, set it to be the console 315451078Speter * as some configuration files don't specify the gdb port. 315551078Speter */ 315651078Speter if (gdbdev == NODEV && (boothowto & RB_GDB)) { 315751078Speter printf("Warning: no GDB port specified. Defaulting to sio%d.\n", 315851078Speter siocnunit); 315951078Speter printf("Set flag 0x80 on desired GDB port in your\n"); 316051078Speter printf("configuration file (currently sio only).\n"); 316151078Speter siogdbiobase = siocniobase; 316251078Speter siogdbunit = siocnunit; 316351078Speter gdbdev = makedev(CDEV_MAJOR, siocnunit); 316451078Speter gdb_getc = siocngetc; 316551078Speter gdb_putc = siocnputc; 316651078Speter } 316751078Speter#endif 316851078Speter#endif 316951078Speter} 317051078Speter 317166230Sjhbstatic void 317266230Sjhbsiocninit(cp) 317366230Sjhb struct consdev *cp; 317466230Sjhb{ 317566230Sjhb comconsole = DEV_TO_UNIT(cp->cn_dev); 317666230Sjhb} 317766230Sjhb 317866230Sjhb#endif 317966230Sjhb 318051078Speter#ifdef __alpha__ 318151078Speter 318255868SgallatinCONS_DRIVER(sio, NULL, NULL, NULL, siocngetc, siocncheckc, siocnputc, NULL); 318351078Speter 318451078Speterint 318551078Spetersiocnattach(port, speed) 318651078Speter int port; 318751078Speter int speed; 318851078Speter{ 318951078Speter int s; 319051078Speter u_char cfcr; 319151078Speter struct siocnstate sp; 319251078Speter 319351078Speter siocniobase = port; 319451078Speter comdefaultrate = speed; 319551078Speter sio_consdev.cn_pri = CN_NORMAL; 319651078Speter sio_consdev.cn_dev = makedev(CDEV_MAJOR, 0); 319751078Speter 319851078Speter s = spltty(); 319951078Speter 320051078Speter /* 320151078Speter * Initialize the divisor latch. We can't rely on 320251078Speter * siocnopen() to do this the first time, since it 320351078Speter * avoids writing to the latch if the latch appears 320451078Speter * to have the correct value. Also, if we didn't 320551078Speter * just read the speed from the hardware, then we 320651078Speter * need to set the speed in hardware so that 320751078Speter * switching it later is null. 320851078Speter */ 320951078Speter cfcr = inb(siocniobase + com_cfcr); 321051078Speter outb(siocniobase + com_cfcr, CFCR_DLAB | cfcr); 321151078Speter outb(siocniobase + com_dlbl, 321251078Speter COMBRD(comdefaultrate) & 0xff); 321351078Speter outb(siocniobase + com_dlbh, 321451078Speter (u_int) COMBRD(comdefaultrate) >> 8); 321551078Speter outb(siocniobase + com_cfcr, cfcr); 321651078Speter 321751078Speter siocnopen(&sp, siocniobase, comdefaultrate); 321851078Speter splx(s); 321951078Speter 322051078Speter cn_tab = &sio_consdev; 322158885Simp return (0); 322251078Speter} 322351078Speter 322451078Speterint 322551078Spetersiogdbattach(port, speed) 322651078Speter int port; 322751078Speter int speed; 322851078Speter{ 322951078Speter int s; 323051078Speter u_char cfcr; 323151078Speter struct siocnstate sp; 323265714Sjhb int unit = 1; /* XXX !!! */ 323351078Speter 323451078Speter siogdbiobase = port; 323551078Speter gdbdefaultrate = speed; 323651078Speter 323765714Sjhb printf("sio%d: gdb debugging port\n", unit); 323865714Sjhb siogdbunit = unit; 323965714Sjhb#if DDB > 0 324065714Sjhb gdbdev = makedev(CDEV_MAJOR, unit); 324165714Sjhb gdb_getc = siocngetc; 324265714Sjhb gdb_putc = siocnputc; 324365714Sjhb#endif 324465714Sjhb 324551078Speter s = spltty(); 324651078Speter 324751078Speter /* 324851078Speter * Initialize the divisor latch. We can't rely on 324951078Speter * siocnopen() to do this the first time, since it 325051078Speter * avoids writing to the latch if the latch appears 325151078Speter * to have the correct value. Also, if we didn't 325251078Speter * just read the speed from the hardware, then we 325351078Speter * need to set the speed in hardware so that 325451078Speter * switching it later is null. 325551078Speter */ 325651078Speter cfcr = inb(siogdbiobase + com_cfcr); 325751078Speter outb(siogdbiobase + com_cfcr, CFCR_DLAB | cfcr); 325851078Speter outb(siogdbiobase + com_dlbl, 325951078Speter COMBRD(gdbdefaultrate) & 0xff); 326051078Speter outb(siogdbiobase + com_dlbh, 326151078Speter (u_int) COMBRD(gdbdefaultrate) >> 8); 326251078Speter outb(siogdbiobase + com_cfcr, cfcr); 326351078Speter 326451078Speter siocnopen(&sp, siogdbiobase, gdbdefaultrate); 326551078Speter splx(s); 326651078Speter 326758885Simp return (0); 326851078Speter} 326951078Speter 327051078Speter#endif 327151078Speter 327251078Speterstatic int 327351078Spetersiocncheckc(dev) 327451078Speter dev_t dev; 327551078Speter{ 327651078Speter int c; 327751078Speter Port_t iobase; 327851078Speter int s; 327951078Speter struct siocnstate sp; 328051078Speter 328151078Speter if (minor(dev) == siogdbunit) 328251078Speter iobase = siogdbiobase; 328351078Speter else 328451078Speter iobase = siocniobase; 328551078Speter s = spltty(); 328651078Speter siocnopen(&sp, iobase, comdefaultrate); 328751078Speter if (inb(iobase + com_lsr) & LSR_RXRDY) 328851078Speter c = inb(iobase + com_data); 328951078Speter else 329051078Speter c = -1; 329151078Speter siocnclose(&sp, iobase); 329251078Speter splx(s); 329351078Speter return (c); 329451078Speter} 329551078Speter 329651078Speter 329751078Speterint 329851078Spetersiocngetc(dev) 329951078Speter dev_t dev; 330051078Speter{ 330151078Speter int c; 330251078Speter Port_t iobase; 330351078Speter int s; 330451078Speter struct siocnstate sp; 330551078Speter 330651078Speter if (minor(dev) == siogdbunit) 330751078Speter iobase = siogdbiobase; 330851078Speter else 330951078Speter iobase = siocniobase; 331051078Speter s = spltty(); 331151078Speter siocnopen(&sp, iobase, comdefaultrate); 331251078Speter while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 331351078Speter ; 331451078Speter c = inb(iobase + com_data); 331551078Speter siocnclose(&sp, iobase); 331651078Speter splx(s); 331751078Speter return (c); 331851078Speter} 331951078Speter 332051078Spetervoid 332151078Spetersiocnputc(dev, c) 332251078Speter dev_t dev; 332351078Speter int c; 332451078Speter{ 332551078Speter int s; 332651078Speter struct siocnstate sp; 332751078Speter Port_t iobase; 332851078Speter 332951078Speter if (minor(dev) == siogdbunit) 333051078Speter iobase = siogdbiobase; 333151078Speter else 333251078Speter iobase = siocniobase; 333351078Speter s = spltty(); 333451078Speter siocnopen(&sp, iobase, comdefaultrate); 333551078Speter siocntxwait(iobase); 333651078Speter outb(iobase + com_data, c); 333751078Speter siocnclose(&sp, iobase); 333851078Speter splx(s); 333951078Speter} 334051078Speter 334151078Speter#ifdef __alpha__ 334251078Speterint 334351078Spetersiogdbgetc() 334451078Speter{ 334551078Speter int c; 334651078Speter Port_t iobase; 334751078Speter int s; 334851078Speter struct siocnstate sp; 334951078Speter 335051078Speter iobase = siogdbiobase; 335151078Speter s = spltty(); 335251078Speter siocnopen(&sp, iobase, gdbdefaultrate); 335351078Speter while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 335451078Speter ; 335551078Speter c = inb(iobase + com_data); 335651078Speter siocnclose(&sp, iobase); 335751078Speter splx(s); 335851078Speter return (c); 335951078Speter} 336051078Speter 336151078Spetervoid 336251078Spetersiogdbputc(c) 336351078Speter int c; 336451078Speter{ 336551078Speter int s; 336651078Speter struct siocnstate sp; 336751078Speter 336851078Speter s = spltty(); 336951078Speter siocnopen(&sp, siogdbiobase, gdbdefaultrate); 337051078Speter siocntxwait(siogdbiobase); 337151078Speter outb(siogdbiobase + com_data, c); 337251078Speter siocnclose(&sp, siogdbiobase); 337351078Speter splx(s); 337451078Speter} 337551078Speter#endif 337651078Speter 337752471SimpDRIVER_MODULE(sio, isa, sio_isa_driver, sio_devclass, 0, 0); 337882555SmsmithDRIVER_MODULE(sio, acpi, sio_isa_driver, sio_devclass, 0, 0); 337952471Simp#if NCARD > 0 338052471SimpDRIVER_MODULE(sio, pccard, sio_pccard_driver, sio_devclass, 0, 0); 338152471Simp#endif 338258885Simp#if NPCI > 0 338358885SimpDRIVER_MODULE(sio, pci, sio_pci_driver, sio_devclass, 0, 0); 338477750SimpDRIVER_MODULE(sio, cardbus, sio_pci_driver, sio_devclass, 0, 0); 338558885Simp#endif 3386