sio.c revision 60674
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 60674 2000-05-18 02:06:24Z tanimura $ 3451078Speter * from: @(#)com.c 7.5 (Berkeley) 5/16/91 3551078Speter * from: i386/isa sio.c,v 1.234 3651078Speter */ 3751078Speter 3851078Speter#include "opt_comconsole.h" 3951078Speter#include "opt_compat.h" 4051078Speter#include "opt_ddb.h" 4151078Speter#include "opt_sio.h" 4254386Simp#include "card.h" 4358885Simp#include "pci.h" 4451078Speter#include "sio.h" 4551078Speter 4651078Speter/* 4751078Speter * Serial driver, based on 386BSD-0.1 com driver. 4851078Speter * Mostly rewritten to use pseudo-DMA. 4951078Speter * Works for National Semiconductor NS8250-NS16550AF UARTs. 5051078Speter * COM driver, based on HP dca driver. 5151078Speter * 5251078Speter * Changes for PC-Card integration: 5351078Speter * - Added PC-Card driver table and handlers 5451078Speter */ 5551078Speter#include <sys/param.h> 5651078Speter#include <sys/systm.h> 5751078Speter#include <sys/reboot.h> 5851078Speter#include <sys/malloc.h> 5951078Speter#include <sys/tty.h> 6051078Speter#include <sys/proc.h> 6151078Speter#include <sys/module.h> 6251078Speter#include <sys/conf.h> 6351078Speter#include <sys/dkstat.h> 6451078Speter#include <sys/fcntl.h> 6551078Speter#include <sys/interrupt.h> 6651078Speter#include <sys/kernel.h> 6751078Speter#include <sys/syslog.h> 6851078Speter#include <sys/sysctl.h> 6951078Speter#include <sys/bus.h> 7060471Snyan#include <machine/bus_pio.h> 7151078Speter#include <machine/bus.h> 7251078Speter#include <sys/rman.h> 7358377Sphk#include <sys/timetc.h> 7451078Speter#include <sys/timepps.h> 7551078Speter 7651078Speter#include <isa/isareg.h> 7751078Speter#include <isa/isavar.h> 7858885Simp#if NPCI > 0 7958885Simp#include <pci/pcireg.h> 8058885Simp#include <pci/pcivar.h> 8158885Simp#endif 8251078Speter#include <machine/lock.h> 8351078Speter 8451078Speter#include <machine/clock.h> 8551078Speter#include <machine/ipl.h> 8651078Speter#ifndef SMP 8751078Speter#include <machine/lock.h> 8851078Speter#endif 8951078Speter#include <machine/resource.h> 9051078Speter 9151078Speter#include <isa/sioreg.h> 9251078Speter 9351078Speter#ifdef COM_ESP 9451078Speter#include <isa/ic/esp.h> 9551078Speter#endif 9651078Speter#include <isa/ic/ns16550.h> 9751078Speter 9851078Speter#ifndef __i386__ 9951078Speter#define disable_intr() 10051078Speter#define enable_intr() 10151078Speter#endif 10251078Speter 10351078Speter#ifdef SMP 10451078Speter#define disable_intr() COM_DISABLE_INTR() 10551078Speter#define enable_intr() COM_ENABLE_INTR() 10651078Speter#endif /* SMP */ 10751078Speter 10851078Speter#define LOTS_OF_EVENTS 64 /* helps separate urgent events from input */ 10951078Speter 11051078Speter#define CALLOUT_MASK 0x80 11151078Speter#define CONTROL_MASK 0x60 11251078Speter#define CONTROL_INIT_STATE 0x20 11351078Speter#define CONTROL_LOCK_STATE 0x40 11451078Speter#define DEV_TO_UNIT(dev) (MINOR_TO_UNIT(minor(dev))) 11551078Speter#define MINOR_MAGIC_MASK (CALLOUT_MASK | CONTROL_MASK) 11651078Speter#define MINOR_TO_UNIT(mynor) ((mynor) & ~MINOR_MAGIC_MASK) 11751078Speter 11851078Speter#ifdef COM_MULTIPORT 11951078Speter/* checks in flags for multiport and which is multiport "master chip" 12051078Speter * for a given card 12151078Speter */ 12251078Speter#define COM_ISMULTIPORT(flags) ((flags) & 0x01) 12351078Speter#define COM_MPMASTER(flags) (((flags) >> 8) & 0x0ff) 12451078Speter#define COM_NOTAST4(flags) ((flags) & 0x04) 12551078Speter#endif /* COM_MULTIPORT */ 12651078Speter 12751078Speter#define COM_CONSOLE(flags) ((flags) & 0x10) 12851078Speter#define COM_FORCECONSOLE(flags) ((flags) & 0x20) 12951078Speter#define COM_LLCONSOLE(flags) ((flags) & 0x40) 13051078Speter#define COM_DEBUGGER(flags) ((flags) & 0x80) 13151078Speter#define COM_LOSESOUTINTS(flags) ((flags) & 0x08) 13251078Speter#define COM_NOFIFO(flags) ((flags) & 0x02) 13351078Speter#define COM_ST16650A(flags) ((flags) & 0x20000) 13451078Speter#define COM_C_NOPROBE (0x40000) 13551078Speter#define COM_NOPROBE(flags) ((flags) & COM_C_NOPROBE) 13651078Speter#define COM_C_IIR_TXRDYBUG (0x80000) 13751078Speter#define COM_IIR_TXRDYBUG(flags) ((flags) & COM_C_IIR_TXRDYBUG) 13851078Speter#define COM_FIFOSIZE(flags) (((flags) & 0xff000000) >> 24) 13951078Speter 14051078Speter#define com_scr 7 /* scratch register for 16450-16550 (R/W) */ 14151078Speter 14260471Snyan#define sio_getreg(com, off) \ 14360471Snyan (bus_space_read_1((com)->bst, (com)->bsh, (off))) 14460471Snyan#define sio_setreg(com, off, value) \ 14560471Snyan (bus_space_write_1((com)->bst, (com)->bsh, (off), (value))) 14660471Snyan 14751078Speter/* 14851078Speter * com state bits. 14951078Speter * (CS_BUSY | CS_TTGO) and (CS_BUSY | CS_TTGO | CS_ODEVREADY) must be higher 15051078Speter * than the other bits so that they can be tested as a group without masking 15151078Speter * off the low bits. 15251078Speter * 15351078Speter * The following com and tty flags correspond closely: 15451078Speter * CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and 15553344Speter * comstop()) 15651078Speter * CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart()) 15751078Speter * CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam()) 15851078Speter * CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam()) 15951078Speter * TS_FLUSH is not used. 16051078Speter * XXX I think TIOCSETA doesn't clear TS_TTSTOP when it clears IXON. 16151078Speter * XXX CS_*FLOW should be CF_*FLOW in com->flags (control flags not state). 16251078Speter */ 16351078Speter#define CS_BUSY 0x80 /* output in progress */ 16451078Speter#define CS_TTGO 0x40 /* output not stopped by XOFF */ 16551078Speter#define CS_ODEVREADY 0x20 /* external device h/w ready (CTS) */ 16651078Speter#define CS_CHECKMSR 1 /* check of MSR scheduled */ 16751078Speter#define CS_CTS_OFLOW 2 /* use CTS output flow control */ 16851078Speter#define CS_DTR_OFF 0x10 /* DTR held off */ 16951078Speter#define CS_ODONE 4 /* output completed */ 17051078Speter#define CS_RTS_IFLOW 8 /* use RTS input flow control */ 17151078Speter#define CSE_BUSYCHECK 1 /* siobusycheck() scheduled */ 17251078Speter 17351078Speterstatic char const * const error_desc[] = { 17451078Speter#define CE_OVERRUN 0 17551078Speter "silo overflow", 17651078Speter#define CE_INTERRUPT_BUF_OVERFLOW 1 17751078Speter "interrupt-level buffer overflow", 17851078Speter#define CE_TTY_BUF_OVERFLOW 2 17951078Speter "tty-level buffer overflow", 18051078Speter}; 18151078Speter 18251078Speter#define CE_NTYPES 3 18351078Speter#define CE_RECORD(com, errnum) (++(com)->delta_error_counts[errnum]) 18451078Speter 18551078Speter/* types. XXX - should be elsewhere */ 18651078Spetertypedef u_int Port_t; /* hardware port */ 18751078Spetertypedef u_char bool_t; /* boolean */ 18851078Speter 18951078Speter/* queue of linear buffers */ 19051078Speterstruct lbq { 19151078Speter u_char *l_head; /* next char to process */ 19251078Speter u_char *l_tail; /* one past the last char to process */ 19351078Speter struct lbq *l_next; /* next in queue */ 19451078Speter bool_t l_queued; /* nonzero if queued */ 19551078Speter}; 19651078Speter 19751078Speter/* com device structure */ 19851078Speterstruct com_s { 19951078Speter u_int flags; /* Copy isa device flags */ 20051078Speter u_char state; /* miscellaneous flag bits */ 20151078Speter bool_t active_out; /* nonzero if the callout device is open */ 20251078Speter u_char cfcr_image; /* copy of value written to CFCR */ 20351078Speter#ifdef COM_ESP 20451078Speter bool_t esp; /* is this unit a hayes esp board? */ 20551078Speter#endif 20651078Speter u_char extra_state; /* more flag bits, separate for order trick */ 20751078Speter u_char fifo_image; /* copy of value written to FIFO */ 20851078Speter bool_t hasfifo; /* nonzero for 16550 UARTs */ 20951078Speter bool_t st16650a; /* Is a Startech 16650A or RTS/CTS compat */ 21051078Speter bool_t loses_outints; /* nonzero if device loses output interrupts */ 21151078Speter u_char mcr_image; /* copy of value written to MCR */ 21251078Speter#ifdef COM_MULTIPORT 21351078Speter bool_t multiport; /* is this unit part of a multiport device? */ 21451078Speter#endif /* COM_MULTIPORT */ 21551078Speter bool_t no_irq; /* nonzero if irq is not attached */ 21651078Speter bool_t gone; /* hardware disappeared */ 21751078Speter bool_t poll; /* nonzero if polling is required */ 21851078Speter bool_t poll_output; /* nonzero if polling for output is required */ 21951078Speter int unit; /* unit number */ 22051078Speter int dtr_wait; /* time to hold DTR down on close (* 1/hz) */ 22151078Speter u_int tx_fifo_size; 22251078Speter u_int wopeners; /* # processes waiting for DCD in open() */ 22351078Speter 22451078Speter /* 22551078Speter * The high level of the driver never reads status registers directly 22651078Speter * because there would be too many side effects to handle conveniently. 22751078Speter * Instead, it reads copies of the registers stored here by the 22851078Speter * interrupt handler. 22951078Speter */ 23051078Speter u_char last_modem_status; /* last MSR read by intr handler */ 23151078Speter u_char prev_modem_status; /* last MSR handled by high level */ 23251078Speter 23351078Speter u_char hotchar; /* ldisc-specific char to be handled ASAP */ 23451078Speter u_char *ibuf; /* start of input buffer */ 23551078Speter u_char *ibufend; /* end of input buffer */ 23651078Speter u_char *ibufold; /* old input buffer, to be freed */ 23751078Speter u_char *ihighwater; /* threshold in input buffer */ 23851078Speter u_char *iptr; /* next free spot in input buffer */ 23951078Speter int ibufsize; /* size of ibuf (not include error bytes) */ 24051078Speter int ierroff; /* offset of error bytes in ibuf */ 24151078Speter 24251078Speter struct lbq obufq; /* head of queue of output buffers */ 24351078Speter struct lbq obufs[2]; /* output buffers */ 24451078Speter 24560471Snyan bus_space_tag_t bst; 24660471Snyan bus_space_handle_t bsh; 24760471Snyan 24851078Speter Port_t data_port; /* i/o ports */ 24951078Speter#ifdef COM_ESP 25051078Speter Port_t esp_port; 25151078Speter#endif 25251078Speter Port_t int_id_port; 25351078Speter Port_t modem_ctl_port; 25451078Speter Port_t line_status_port; 25551078Speter Port_t modem_status_port; 25651078Speter Port_t intr_ctl_port; /* Ports of IIR register */ 25751078Speter 25851078Speter struct tty *tp; /* cross reference */ 25951078Speter 26051078Speter /* Initial state. */ 26151078Speter struct termios it_in; /* should be in struct tty */ 26251078Speter struct termios it_out; 26351078Speter 26451078Speter /* Lock state. */ 26551078Speter struct termios lt_in; /* should be in struct tty */ 26651078Speter struct termios lt_out; 26751078Speter 26851078Speter bool_t do_timestamp; 26951078Speter bool_t do_dcd_timestamp; 27051078Speter struct timeval timestamp; 27151078Speter struct timeval dcd_timestamp; 27251078Speter struct pps_state pps; 27351078Speter 27451078Speter u_long bytes_in; /* statistics */ 27551078Speter u_long bytes_out; 27651078Speter u_int delta_error_counts[CE_NTYPES]; 27751078Speter u_long error_counts[CE_NTYPES]; 27851078Speter 27951078Speter struct resource *irqres; 28051078Speter struct resource *ioportres; 28154386Simp void *cookie; 28251078Speter 28351078Speter /* 28451078Speter * Data area for output buffers. Someday we should build the output 28551078Speter * buffer queue without copying data. 28651078Speter */ 28751078Speter u_char obuf1[256]; 28851078Speter u_char obuf2[256]; 28951078Speter}; 29051078Speter 29151078Speter#ifdef COM_ESP 29251078Speterstatic int espattach __P((struct com_s *com, Port_t esp_port)); 29351078Speter#endif 29458885Simpstatic int sioattach __P((device_t dev, int rid)); 29552471Simpstatic int sio_isa_attach __P((device_t dev)); 29651078Speter 29751078Speterstatic timeout_t siobusycheck; 29851078Speterstatic timeout_t siodtrwakeup; 29951078Speterstatic void comhardclose __P((struct com_s *com)); 30051078Speterstatic void sioinput __P((struct com_s *com)); 30151078Speterstatic void siointr1 __P((struct com_s *com)); 30251078Speterstatic void siointr __P((void *arg)); 30351078Speterstatic int commctl __P((struct com_s *com, int bits, int how)); 30451078Speterstatic int comparam __P((struct tty *tp, struct termios *t)); 30551078Speterstatic swihand_t siopoll; 30658885Simpstatic int sioprobe __P((device_t dev, int xrid)); 30752471Simpstatic int sio_isa_probe __P((device_t dev)); 30851078Speterstatic void siosettimeout __P((void)); 30951078Speterstatic int siosetwater __P((struct com_s *com, speed_t speed)); 31051078Speterstatic void comstart __P((struct tty *tp)); 31151654Sphkstatic void comstop __P((struct tty *tp, int rw)); 31251078Speterstatic timeout_t comwakeup; 31351078Speterstatic void disc_optim __P((struct tty *tp, struct termios *t, 31451078Speter struct com_s *com)); 31551078Speter 31652471Simp#if NCARD > 0 31752471Simpstatic int sio_pccard_attach __P((device_t dev)); 31854386Simpstatic int sio_pccard_detach __P((device_t dev)); 31952471Simpstatic int sio_pccard_probe __P((device_t dev)); 32052471Simp#endif /* NCARD > 0 */ 32151078Speter 32258885Simp#if NPCI > 0 32358885Simpstatic int sio_pci_attach __P((device_t dev)); 32458885Simpstatic void sio_pci_kludge_unit __P((device_t dev)); 32558885Simpstatic int sio_pci_probe __P((device_t dev)); 32658885Simp#endif /* NPCI > 0 */ 32758885Simp 32851078Speterstatic char driver_name[] = "sio"; 32951078Speter 33051078Speter/* table and macro for fast conversion from a unit number to its com struct */ 33151078Speterstatic devclass_t sio_devclass; 33251078Speter#define com_addr(unit) ((struct com_s *) \ 33351078Speter devclass_get_softc(sio_devclass, unit)) 33451078Speter 33552471Simpstatic device_method_t sio_isa_methods[] = { 33651078Speter /* Device interface */ 33752471Simp DEVMETHOD(device_probe, sio_isa_probe), 33852471Simp DEVMETHOD(device_attach, sio_isa_attach), 33951078Speter 34051078Speter { 0, 0 } 34151078Speter}; 34251078Speter 34352471Simpstatic driver_t sio_isa_driver = { 34451078Speter driver_name, 34552471Simp sio_isa_methods, 34651078Speter sizeof(struct com_s), 34751078Speter}; 34851078Speter 34952471Simp#if NCARD > 0 35052471Simpstatic device_method_t sio_pccard_methods[] = { 35152471Simp /* Device interface */ 35252471Simp DEVMETHOD(device_probe, sio_pccard_probe), 35352471Simp DEVMETHOD(device_attach, sio_pccard_attach), 35452471Simp DEVMETHOD(device_detach, sio_pccard_detach), 35552471Simp 35652471Simp { 0, 0 } 35752471Simp}; 35852471Simp 35952471Simpstatic driver_t sio_pccard_driver = { 36052471Simp driver_name, 36152471Simp sio_pccard_methods, 36252471Simp sizeof(struct com_s), 36352471Simp}; 36458885Simp#endif /* NCARD > 0 */ 36552471Simp 36658885Simp#if NPCI > 0 36758885Simpstatic device_method_t sio_pci_methods[] = { 36858885Simp /* Device interface */ 36958885Simp DEVMETHOD(device_probe, sio_pci_probe), 37058885Simp DEVMETHOD(device_attach, sio_pci_attach), 37158885Simp 37258885Simp { 0, 0 } 37358885Simp}; 37458885Simp 37558885Simpstatic driver_t sio_pci_driver = { 37658885Simp driver_name, 37758885Simp sio_pci_methods, 37858885Simp sizeof(struct com_s), 37958885Simp}; 38058885Simp#endif /* NPCI > 0 */ 38158885Simp 38251078Speterstatic d_open_t sioopen; 38351078Speterstatic d_close_t sioclose; 38451078Speterstatic d_read_t sioread; 38551078Speterstatic d_write_t siowrite; 38651078Speterstatic d_ioctl_t sioioctl; 38751078Speter 38851078Speter#define CDEV_MAJOR 28 38951078Speterstatic struct cdevsw sio_cdevsw = { 39051078Speter /* open */ sioopen, 39151078Speter /* close */ sioclose, 39251078Speter /* read */ sioread, 39351078Speter /* write */ siowrite, 39451078Speter /* ioctl */ sioioctl, 39551654Sphk /* poll */ ttypoll, 39651078Speter /* mmap */ nommap, 39751078Speter /* strategy */ nostrategy, 39851078Speter /* name */ driver_name, 39951078Speter /* maj */ CDEV_MAJOR, 40051078Speter /* dump */ nodump, 40151078Speter /* psize */ nopsize, 40251078Speter /* flags */ D_TTY, 40351078Speter /* bmaj */ -1 40451078Speter}; 40551078Speter 40651078Speterint comconsole = -1; 40751078Speterstatic volatile speed_t comdefaultrate = CONSPEED; 40851078Speter#ifdef __alpha__ 40951078Speterstatic volatile speed_t gdbdefaultrate = CONSPEED; 41051078Speter#endif 41151078Speterstatic u_int com_events; /* input chars + weighted output completions */ 41251078Speterstatic Port_t siocniobase; 41351078Speterstatic int siocnunit; 41451078Speterstatic Port_t siogdbiobase; 41551078Speterstatic int siogdbunit = -1; 41651078Speterstatic bool_t sio_registered; 41751078Speterstatic int sio_timeout; 41851078Speterstatic int sio_timeouts_until_log; 41951078Speterstatic struct callout_handle sio_timeout_handle 42051078Speter = CALLOUT_HANDLE_INITIALIZER(&sio_timeout_handle); 42153344Speterstatic int sio_numunits; 42251078Speter 42351078Speterstatic struct speedtab comspeedtab[] = { 42451078Speter { 0, 0 }, 42551078Speter { 50, COMBRD(50) }, 42651078Speter { 75, COMBRD(75) }, 42751078Speter { 110, COMBRD(110) }, 42851078Speter { 134, COMBRD(134) }, 42951078Speter { 150, COMBRD(150) }, 43051078Speter { 200, COMBRD(200) }, 43151078Speter { 300, COMBRD(300) }, 43251078Speter { 600, COMBRD(600) }, 43351078Speter { 1200, COMBRD(1200) }, 43451078Speter { 1800, COMBRD(1800) }, 43551078Speter { 2400, COMBRD(2400) }, 43651078Speter { 4800, COMBRD(4800) }, 43751078Speter { 9600, COMBRD(9600) }, 43851078Speter { 19200, COMBRD(19200) }, 43951078Speter { 38400, COMBRD(38400) }, 44051078Speter { 57600, COMBRD(57600) }, 44151078Speter { 115200, COMBRD(115200) }, 44251078Speter { -1, -1 } 44351078Speter}; 44451078Speter 44551078Speter#ifdef COM_ESP 44651078Speter/* XXX configure this properly. */ 44751078Speterstatic Port_t likely_com_ports[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, }; 44851078Speterstatic Port_t likely_esp_ports[] = { 0x140, 0x180, 0x280, 0 }; 44951078Speter#endif 45051078Speter 45151078Speter/* 45251078Speter * handle sysctl read/write requests for console speed 45351078Speter * 45451078Speter * In addition to setting comdefaultrate for I/O through /dev/console, 45551078Speter * also set the initial and lock values for the /dev/ttyXX device 45651078Speter * if there is one associated with the console. Finally, if the /dev/tty 45751078Speter * device has already been open, change the speed on the open running port 45851078Speter * itself. 45951078Speter */ 46051078Speter 46151078Speterstatic int 46251078Spetersysctl_machdep_comdefaultrate SYSCTL_HANDLER_ARGS 46351078Speter{ 46451078Speter int error, s; 46551078Speter speed_t newspeed; 46651078Speter struct com_s *com; 46751078Speter struct tty *tp; 46851078Speter 46951078Speter newspeed = comdefaultrate; 47051078Speter 47151078Speter error = sysctl_handle_opaque(oidp, &newspeed, sizeof newspeed, req); 47251078Speter if (error || !req->newptr) 47351078Speter return (error); 47451078Speter 47551078Speter comdefaultrate = newspeed; 47651078Speter 47751078Speter if (comconsole < 0) /* serial console not selected? */ 47851078Speter return (0); 47951078Speter 48051078Speter com = com_addr(comconsole); 48157915Simp if (com == NULL) 48251078Speter return (ENXIO); 48351078Speter 48451078Speter /* 48551078Speter * set the initial and lock rates for /dev/ttydXX and /dev/cuaXX 48651078Speter * (note, the lock rates really are boolean -- if non-zero, disallow 48751078Speter * speed changes) 48851078Speter */ 48951078Speter com->it_in.c_ispeed = com->it_in.c_ospeed = 49051078Speter com->lt_in.c_ispeed = com->lt_in.c_ospeed = 49151078Speter com->it_out.c_ispeed = com->it_out.c_ospeed = 49251078Speter com->lt_out.c_ispeed = com->lt_out.c_ospeed = comdefaultrate; 49351078Speter 49451078Speter /* 49551078Speter * if we're open, change the running rate too 49651078Speter */ 49751078Speter tp = com->tp; 49851078Speter if (tp && (tp->t_state & TS_ISOPEN)) { 49951078Speter tp->t_termios.c_ispeed = 50051078Speter tp->t_termios.c_ospeed = comdefaultrate; 50151078Speter s = spltty(); 50251078Speter error = comparam(tp, &tp->t_termios); 50351078Speter splx(s); 50451078Speter } 50551078Speter return error; 50651078Speter} 50751078Speter 50851078SpeterSYSCTL_PROC(_machdep, OID_AUTO, conspeed, CTLTYPE_INT | CTLFLAG_RW, 50951078Speter 0, 0, sysctl_machdep_comdefaultrate, "I", ""); 51051078Speter 51153344Speter#define SET_FLAG(dev, bit) device_set_flags(dev, device_get_flags(dev) | (bit)) 51253344Speter#define CLR_FLAG(dev, bit) device_set_flags(dev, device_get_flags(dev) & ~(bit)) 51353344Speter 51451078Speter#if NCARD > 0 51552471Simpstatic int 51652471Simpsio_pccard_probe(dev) 51752471Simp device_t dev; 51851078Speter{ 51954386Simp /* Do not probe IRQ - pccard doesn't turn on the interrupt line */ 52054386Simp /* until bus_setup_intr */ 52153344Speter SET_FLAG(dev, COM_C_NOPROBE); 52253344Speter 52358885Simp return (sioprobe(dev, 0)); 52452471Simp} 52551078Speter 52652471Simpstatic int 52752471Simpsio_pccard_attach(dev) 52852471Simp device_t dev; 52952471Simp{ 53058885Simp return (sioattach(dev, 0)); 53151078Speter} 53251078Speter 53351078Speter/* 53452471Simp * sio_detach - unload the driver and clear the table. 53551078Speter * XXX TODO: 53651078Speter * This is usually called when the card is ejected, but 53751078Speter * can be caused by a modunload of a controller driver. 53851078Speter * The idea is to reset the driver's view of the device 53951078Speter * and ensure that any driver entry points such as 54051078Speter * read and write do not hang. 54151078Speter */ 54253978Simpstatic int 54352471Simpsio_pccard_detach(dev) 54452471Simp device_t dev; 54551078Speter{ 54651078Speter struct com_s *com; 54751078Speter 54852471Simp com = (struct com_s *) device_get_softc(dev); 54957915Simp if (com == NULL) { 55052471Simp device_printf(dev, "NULL com in siounload\n"); 55154386Simp return (0); 55251078Speter } 55354386Simp com->gone = 1; 55454386Simp if (com->irqres) { 55554386Simp bus_teardown_intr(dev, com->irqres, com->cookie); 55654386Simp bus_release_resource(dev, SYS_RES_IRQ, 0, com->irqres); 55754386Simp } 55854386Simp if (com->ioportres) 55954386Simp bus_release_resource(dev, SYS_RES_IOPORT, 0, com->ioportres); 56051078Speter if (com->tp && (com->tp->t_state & TS_ISOPEN)) { 56157915Simp device_printf(dev, "still open, forcing close\n"); 56251078Speter com->tp->t_gen++; 56351078Speter ttyclose(com->tp); 56451078Speter ttwakeup(com->tp); 56551078Speter ttwwakeup(com->tp); 56651078Speter } else { 56751078Speter if (com->ibuf != NULL) 56851078Speter free(com->ibuf, M_DEVBUF); 56951078Speter } 57057915Simp device_printf(dev, "unloaded\n"); 57153978Simp return (0); 57251078Speter} 57351078Speter#endif /* NCARD > 0 */ 57451078Speter 57558885Simp#if NPCI > 0 57658885Simpstruct pci_ids { 57758885Simp u_int32_t type; 57858885Simp const char *desc; 57958885Simp int rid; 58058885Simp}; 58151078Speter 58258885Simpstatic struct pci_ids pci_ids[] = { 58358885Simp { 0x100812b9, "3COM PCI FaxModem", 0x10 }, 58458885Simp { 0x048011c1, "ActionTec 56k FAX PCI Modem", 0x14 }, 58558885Simp { 0x00000000, NULL, 0 } 58658885Simp}; 58758885Simp 58858885Simpstatic int 58958885Simpsio_pci_attach(dev) 59058885Simp device_t dev; 59158885Simp{ 59258885Simp u_int32_t type; 59358885Simp struct pci_ids *id; 59458885Simp 59558885Simp type = pci_get_devid(dev); 59658885Simp id = pci_ids; 59758885Simp while (id->type && id->type != type) 59858885Simp id++; 59958885Simp if (id->desc == NULL) 60058885Simp return (ENXIO); 60158885Simp sio_pci_kludge_unit(dev); 60258885Simp return (sioattach(dev, id->rid)); 60358885Simp} 60458885Simp 60558885Simp/* 60658885Simp * Don't cut and paste this to other drivers. It is a horrible kludge 60758885Simp * which will fail to work and also be unnecessary in future versions. 60858885Simp */ 60958885Simpstatic void 61058885Simpsio_pci_kludge_unit(dev) 61158885Simp device_t dev; 61258885Simp{ 61358885Simp devclass_t dc; 61458885Simp int err; 61558885Simp int start; 61658885Simp int unit; 61758885Simp 61858885Simp unit = 0; 61958885Simp start = 0; 62058885Simp while (resource_int_value("sio", unit, "port", &start) == 0 && 62158885Simp start > 0) 62258885Simp unit++; 62358885Simp if (device_get_unit(dev) < unit) { 62458885Simp dc = device_get_devclass(dev); 62558885Simp while (devclass_get_device(dc, unit)) 62658885Simp unit++; 62758885Simp device_printf(dev, "moving to sio%d\n", unit); 62858885Simp err = device_set_unit(dev, unit); /* EVIL DO NOT COPY */ 62958885Simp if (err) 63058885Simp device_printf(dev, "error moving device %d\n", err); 63158885Simp } 63258885Simp} 63358885Simp 63458885Simpstatic int 63558885Simpsio_pci_probe(dev) 63658885Simp device_t dev; 63758885Simp{ 63858885Simp u_int32_t type; 63958885Simp struct pci_ids *id; 64058885Simp 64158885Simp type = pci_get_devid(dev); 64258885Simp id = pci_ids; 64358885Simp while (id->type && id->type != type) 64458885Simp id++; 64558885Simp if (id->desc == NULL) 64658885Simp return (ENXIO); 64758885Simp device_set_desc(dev, id->desc); 64858885Simp return (sioprobe(dev, id->rid)); 64958885Simp} 65058885Simp#endif /* NPCI > 0 */ 65158885Simp 65251078Speterstatic struct isa_pnp_id sio_ids[] = { 65351078Speter {0x0005d041, "Standard PC COM port"}, /* PNP0500 */ 65451078Speter {0x0105d041, "16550A-compatible COM port"}, /* PNP0501 */ 65551078Speter {0x0205d041, "Multiport serial device (non-intelligent 16550)"}, /* PNP0502 */ 65651078Speter {0x1005d041, "Generic IRDA-compatible device"}, /* PNP0510 */ 65751078Speter {0x1105d041, "Generic IRDA-compatible device"}, /* PNP0511 */ 65854944Speter /* Devices that do not have a compatid */ 65954944Speter {0x7602a904, NULL}, /* AEI0276 - 56K v.90 Fax Modem (LKT) */ 66054944Speter {0x00007905, NULL}, /* AKY0000 - 56K Plug&Play Modem */ 66154944Speter {0x01405407, NULL}, /* AZT4001 - AZT3000 PnP SOUND DEVICE, MODEM */ 66254944Speter {0x56039008, NULL}, /* BDP0356 - Best Data 56x2 */ 66354944Speter {0x36339008, NULL}, /* BDP3336 - Best Data Prods. 336F */ 66454944Speter {0x0014490a, NULL}, /* BRI1400 - Boca 33.6 PnP */ 66554944Speter {0x0015490a, NULL}, /* BRI1500 - Internal Fax Data */ 66654944Speter {0x0034490a, NULL}, /* BRI3400 - Internal ACF Modem */ 66754944Speter {0x00b4490a, NULL}, /* BRIB400 - Boca 56k PnP */ 66854944Speter {0x0030320d, NULL}, /* CIR3000 - Cirrus Logic V43 */ 66956229Speter {0x0100440e, NULL}, /* CRD0001 - Cardinal MVP288IV ? */ 67060674Stanimura {0x36033610, NULL}, /* DAV0336 - DAVICOM 336PNP MODEM */ 67159888Stanimura {0x0000aa1a, NULL}, /* FUJ0000 - FUJITSU Modem 33600 PNP/I2 */ 67254944Speter {0x1200c31e, NULL}, /* GVC0012 - VF1128HV-R9 (win modem?) */ 67354944Speter {0x0303c31e, NULL}, /* GVC0303 - MaxTech 33.6 PnP D/F/V */ 67455124Speter {0x0505c31e, NULL}, /* GVC0505 - GVC 56k Faxmodem */ 67554944Speter {0x0050c31e, NULL}, /* GVC5000 - some GVC modem */ 67654944Speter {0x3800f91e, NULL}, /* GWY0038 - Telepath with v.90 */ 67754944Speter {0x9062f91e, NULL}, /* GWY6290 - Telepath with x2 Technology */ 67854944Speter {0x0000f435, NULL}, /* MOT0000 - Motorola ModemSURFR 33.6 Intern */ 67954944Speter {0x5015f435, NULL}, /* MOT1550 - Motorola ModemSURFR 56K Modem */ 68054944Speter {0xf015f435, NULL}, /* MOT15F0 - Motorola VoiceSURFR 56K Modem */ 68154944Speter {0x6045f435, NULL}, /* MOT4560 - Motorola ? */ 68254944Speter {0x61e7a338, NULL}, /* NECE761 - 33.6Modem */ 68360674Stanimura {0x0f804f3f, NULL}, /* OZO800f - Zoom 2812 (56k Modem) */ 68454944Speter {0x39804f3f, NULL}, /* OZO8039 - Zoom 56k flex */ 68557769Speter {0x3024a341, NULL}, /* PMC2430 - Pace 56 Voice Internal Modem */ 68654944Speter {0x1000eb49, NULL}, /* ROK0010 - Rockwell ? */ 68754944Speter {0x5002734a, NULL}, /* RSS0250 - 5614Jx3(G) Internal Modem */ 68854944Speter {0xc100ad4d, NULL}, /* SMM00C1 - Leopard 56k PnP */ 68956229Speter {0x9012b04e, NULL}, /* SUP1290 - Supra ? */ 69054944Speter {0x1013b04e, NULL}, /* SUP1310 - SupraExpress 336i PnP */ 69154944Speter {0x8013b04e, NULL}, /* SUP1380 - SupraExpress 288i PnP Voice */ 69254944Speter {0x8113b04e, NULL}, /* SUP1381 - SupraExpress 336i PnP Voice */ 69354944Speter {0x5016b04e, NULL}, /* SUP1650 - Supra 336i Sp Intl */ 69454944Speter {0x7420b04e, NULL}, /* SUP2070 - Supra ? */ 69554944Speter {0x8020b04e, NULL}, /* SUP2080 - Supra ? */ 69654944Speter {0x8420b04e, NULL}, /* SUP2084 - SupraExpress 56i PnP */ 69756229Speter {0x7121b04e, NULL}, /* SUP2171 - SupraExpress 56i Sp? */ 69854944Speter {0x8024b04e, NULL}, /* SUP2480 - Supra ? */ 69954944Speter {0x01007256, NULL}, /* USR0001 - U.S. Robotics Inc., Sportster W */ 70054944Speter {0x02007256, NULL}, /* USR0002 - U.S. Robotics Inc. Sportster 33. */ 70154944Speter {0x04007256, NULL}, /* USR0004 - USR Sportster 14.4k */ 70254944Speter {0x06007256, NULL}, /* USR0006 - USR Sportster 33.6k */ 70356229Speter {0x11007256, NULL}, /* USR0011 - USR ? */ 70454944Speter {0x01017256, NULL}, /* USR0101 - USR ? */ 70554944Speter {0x30207256, NULL}, /* USR2030 - U.S.Robotics Inc. Sportster 560 */ 70654944Speter {0x50207256, NULL}, /* USR2050 - U.S.Robotics Inc. Sportster 33. */ 70754944Speter {0x70207256, NULL}, /* USR2070 - U.S.Robotics Inc. Sportster 560 */ 70854944Speter {0x30307256, NULL}, /* USR3030 - U.S. Robotics 56K FAX INT */ 70954944Speter {0x31307256, NULL}, /* USR3031 - U.S. Robotics 56K FAX INT */ 71058848Speter {0x50307256, NULL}, /* USR3050 - U.S. Robotics 56K FAX INT */ 71154944Speter {0x70307256, NULL}, /* USR3070 - U.S. Robotics 56K Voice INT */ 71256229Speter {0x90307256, NULL}, /* USR3090 - USR ? */ 71354944Speter {0x90917256, NULL}, /* USR9190 - USR 56k Voice INT */ 71454944Speter {0x0300695c, NULL}, /* WCI0003 - Fax/Voice/Modem/Speakphone/Asvd */ 71554944Speter {0x61f7896a, NULL}, /* ZTIF761 - Zoom ComStar 33.6 */ 71651078Speter {0} 71751078Speter}; 71851078Speter 71956229Speter 72056229Speter 72151078Speterstatic int 72252471Simpsio_isa_probe(dev) 72352471Simp device_t dev; 72452471Simp{ 72552471Simp /* Check isapnp ids */ 72652471Simp if (ISA_PNP_PROBE(device_get_parent(dev), dev, sio_ids) == ENXIO) 72752471Simp return (ENXIO); 72858885Simp return (sioprobe(dev, 0)); 72952471Simp} 73052471Simp 73152471Simpstatic int 73258885Simpsioprobe(dev, xrid) 73351078Speter device_t dev; 73458885Simp int xrid; 73551078Speter{ 73653344Speter#if 0 73751078Speter static bool_t already_init; 73853344Speter device_t xdev; 73953344Speter#endif 74060471Snyan struct com_s *com; 74151078Speter bool_t failures[10]; 74251078Speter int fn; 74351078Speter device_t idev; 74451078Speter Port_t iobase; 74551078Speter intrmask_t irqmap[4]; 74651078Speter intrmask_t irqs; 74751078Speter u_char mcr_image; 74851078Speter int result; 74954206Speter u_long xirq; 75051088Speter u_int flags = device_get_flags(dev); 75151078Speter int rid; 75251078Speter struct resource *port; 75351078Speter 75458885Simp rid = xrid; 75551078Speter port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 75651078Speter 0, ~0, IO_COMSIZE, RF_ACTIVE); 75751078Speter if (!port) 75857915Simp return (ENXIO); 75951078Speter 76060471Snyan com = device_get_softc(dev); 76160471Snyan com->bst = rman_get_bustag(port); 76260471Snyan com->bsh = rman_get_bushandle(port); 76360471Snyan 76453344Speter#if 0 76553344Speter /* 76653344Speter * XXX this is broken - when we are first called, there are no 76753344Speter * previously configured IO ports. We could hard code 76853344Speter * 0x3f8, 0x2f8, 0x3e8, 0x2e8 etc but that's probably worse. 76953344Speter * This code has been doing nothing since the conversion since 77053344Speter * "count" is zero the first time around. 77153344Speter */ 77251078Speter if (!already_init) { 77351078Speter /* 77451078Speter * Turn off MCR_IENABLE for all likely serial ports. An unused 77551078Speter * port with its MCR_IENABLE gate open will inhibit interrupts 77651078Speter * from any used port that shares the interrupt vector. 77751078Speter * XXX the gate enable is elsewhere for some multiports. 77851078Speter */ 77951078Speter device_t *devs; 78053344Speter int count, i, xioport; 78151078Speter 78251078Speter devclass_get_devices(sio_devclass, &devs, &count); 78351078Speter for (i = 0; i < count; i++) { 78451078Speter xdev = devs[i]; 78554194Speter if (device_is_enabled(xdev) && 78654194Speter bus_get_resource(xdev, SYS_RES_IOPORT, 0, &xioport, 78754194Speter NULL) == 0) 78853344Speter outb(xioport + com_mcr, 0); 78951078Speter } 79051078Speter free(devs, M_TEMP); 79151078Speter already_init = TRUE; 79251078Speter } 79353344Speter#endif 79451078Speter 79551078Speter if (COM_LLCONSOLE(flags)) { 79651078Speter printf("sio%d: reserved for low-level i/o\n", 79751078Speter device_get_unit(dev)); 79856788Sbde bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 79951078Speter return (ENXIO); 80051078Speter } 80151078Speter 80251078Speter /* 80351078Speter * If the device is on a multiport card and has an AST/4 80451078Speter * compatible interrupt control register, initialize this 80551078Speter * register and prepare to leave MCR_IENABLE clear in the mcr. 80651078Speter * Otherwise, prepare to set MCR_IENABLE in the mcr. 80751078Speter * Point idev to the device struct giving the correct id_irq. 80851078Speter * This is the struct for the master device if there is one. 80951078Speter */ 81051078Speter idev = dev; 81151078Speter mcr_image = MCR_IENABLE; 81251078Speter#ifdef COM_MULTIPORT 81357234Sbde if (COM_ISMULTIPORT(flags)) { 81454206Speter Port_t xiobase; 81554206Speter u_long io; 81654206Speter 81751078Speter idev = devclass_get_device(sio_devclass, COM_MPMASTER(flags)); 81851078Speter if (idev == NULL) { 81951078Speter printf("sio%d: master device %d not configured\n", 82051078Speter device_get_unit(dev), COM_MPMASTER(flags)); 82151078Speter idev = dev; 82251078Speter } 82357234Sbde if (!COM_NOTAST4(flags)) { 82457234Sbde if (bus_get_resource(idev, SYS_RES_IOPORT, 0, &io, 82557234Sbde NULL) == 0) { 82657234Sbde xiobase = io; 82757234Sbde if (bus_get_resource(idev, SYS_RES_IRQ, 0, 82857234Sbde NULL, NULL) == 0) 82957234Sbde outb(xiobase + com_scr, 0x80); 83057234Sbde else 83157234Sbde outb(xiobase + com_scr, 0); 83257234Sbde } 83357234Sbde mcr_image = 0; 83451078Speter } 83551078Speter } 83651078Speter#endif /* COM_MULTIPORT */ 83754194Speter if (bus_get_resource(idev, SYS_RES_IRQ, 0, NULL, NULL) != 0) 83851078Speter mcr_image = 0; 83951078Speter 84051078Speter bzero(failures, sizeof failures); 84151078Speter iobase = rman_get_start(port); 84251078Speter 84351078Speter /* 84451078Speter * We don't want to get actual interrupts, just masked ones. 84551078Speter * Interrupts from this line should already be masked in the ICU, 84651078Speter * but mask them in the processor as well in case there are some 84751078Speter * (misconfigured) shared interrupts. 84851078Speter */ 84951078Speter disable_intr(); 85051078Speter/* EXTRA DELAY? */ 85151078Speter 85251078Speter /* 85351078Speter * Initialize the speed and the word size and wait long enough to 85451078Speter * drain the maximum of 16 bytes of junk in device output queues. 85551078Speter * The speed is undefined after a master reset and must be set 85651078Speter * before relying on anything related to output. There may be 85751078Speter * junk after a (very fast) soft reboot and (apparently) after 85851078Speter * master reset. 85951078Speter * XXX what about the UART bug avoided by waiting in comparam()? 86051078Speter * We don't want to to wait long enough to drain at 2 bps. 86151078Speter */ 86251078Speter if (iobase == siocniobase) 86351078Speter DELAY((16 + 1) * 1000000 / (comdefaultrate / 10)); 86451078Speter else { 86560471Snyan sio_setreg(com, com_cfcr, CFCR_DLAB | CFCR_8BITS); 86660471Snyan sio_setreg(com, com_dlbl, COMBRD(SIO_TEST_SPEED) & 0xff); 86760471Snyan sio_setreg(com, com_dlbh, (u_int) COMBRD(SIO_TEST_SPEED) >> 8); 86860471Snyan sio_setreg(com, com_cfcr, CFCR_8BITS); 86951078Speter DELAY((16 + 1) * 1000000 / (SIO_TEST_SPEED / 10)); 87051078Speter } 87151078Speter 87251078Speter /* 87351078Speter * Enable the interrupt gate and disable device interupts. This 87451078Speter * should leave the device driving the interrupt line low and 87551078Speter * guarantee an edge trigger if an interrupt can be generated. 87651078Speter */ 87751078Speter/* EXTRA DELAY? */ 87860471Snyan sio_setreg(com, com_mcr, mcr_image); 87960471Snyan sio_setreg(com, com_ier, 0); 88051078Speter DELAY(1000); /* XXX */ 88151078Speter irqmap[0] = isa_irq_pending(); 88251078Speter 88351078Speter /* 88451078Speter * Attempt to set loopback mode so that we can send a null byte 88551078Speter * without annoying any external device. 88651078Speter */ 88751078Speter/* EXTRA DELAY? */ 88860471Snyan sio_setreg(com, com_mcr, mcr_image | MCR_LOOPBACK); 88951078Speter 89051078Speter /* 89151078Speter * Attempt to generate an output interrupt. On 8250's, setting 89251078Speter * IER_ETXRDY generates an interrupt independent of the current 89351078Speter * setting and independent of whether the THR is empty. On 16450's, 89451078Speter * setting IER_ETXRDY generates an interrupt independent of the 89551078Speter * current setting. On 16550A's, setting IER_ETXRDY only 89651078Speter * generates an interrupt when IER_ETXRDY is not already set. 89751078Speter */ 89860471Snyan sio_setreg(com, com_ier, IER_ETXRDY); 89951078Speter 90051078Speter /* 90151078Speter * On some 16x50 incompatibles, setting IER_ETXRDY doesn't generate 90251078Speter * an interrupt. They'd better generate one for actually doing 90351078Speter * output. Loopback may be broken on the same incompatibles but 90451078Speter * it's unlikely to do more than allow the null byte out. 90551078Speter */ 90660471Snyan sio_setreg(com, com_data, 0); 90751078Speter DELAY((1 + 2) * 1000000 / (SIO_TEST_SPEED / 10)); 90851078Speter 90951078Speter /* 91051078Speter * Turn off loopback mode so that the interrupt gate works again 91151078Speter * (MCR_IENABLE was hidden). This should leave the device driving 91251078Speter * an interrupt line high. It doesn't matter if the interrupt 91351078Speter * line oscillates while we are not looking at it, since interrupts 91451078Speter * are disabled. 91551078Speter */ 91651078Speter/* EXTRA DELAY? */ 91760471Snyan sio_setreg(com, com_mcr, mcr_image); 91851078Speter 91951078Speter /* 92052471Simp * Some pcmcia cards have the "TXRDY bug", so we check everyone 92151078Speter * for IIR_TXRDY implementation ( Palido 321s, DC-1S... ) 92251078Speter */ 92353370Speter if (COM_NOPROBE(flags)) { 92453370Speter /* Reading IIR register twice */ 92553370Speter for (fn = 0; fn < 2; fn ++) { 92653370Speter DELAY(10000); 92760471Snyan failures[6] = sio_getreg(com, com_iir); 92853370Speter } 92953370Speter /* Check IIR_TXRDY clear ? */ 93053370Speter result = 0; 93153370Speter if (failures[6] & IIR_TXRDY) { 93253370Speter /* Nop, Double check with clearing IER */ 93360471Snyan sio_setreg(com, com_ier, 0); 93460471Snyan if (sio_getreg(com, com_iir) & IIR_NOPEND) { 93553370Speter /* Ok. we're familia this gang */ 93653370Speter SET_FLAG(dev, COM_C_IIR_TXRDYBUG); 93753370Speter } else { 93853370Speter /* Unknown, Just omit this chip.. XXX */ 93953370Speter result = ENXIO; 94053370Speter } 94151078Speter } else { 94253370Speter /* OK. this is well-known guys */ 94353370Speter CLR_FLAG(dev, COM_C_IIR_TXRDYBUG); 94451078Speter } 94560471Snyan sio_setreg(com, com_cfcr, CFCR_8BITS); 94653344Speter enable_intr(); 94753344Speter bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 94853344Speter return (iobase == siocniobase ? 0 : result); 94953344Speter } 95053344Speter 95151078Speter /* 95251078Speter * Check that 95351078Speter * o the CFCR, IER and MCR in UART hold the values written to them 95451078Speter * (the values happen to be all distinct - this is good for 95551078Speter * avoiding false positive tests from bus echoes). 95651078Speter * o an output interrupt is generated and its vector is correct. 95751078Speter * o the interrupt goes away when the IIR in the UART is read. 95851078Speter */ 95951078Speter/* EXTRA DELAY? */ 96060471Snyan failures[0] = sio_getreg(com, com_cfcr) - CFCR_8BITS; 96160471Snyan failures[1] = sio_getreg(com, com_ier) - IER_ETXRDY; 96260471Snyan failures[2] = sio_getreg(com, com_mcr) - mcr_image; 96351078Speter DELAY(10000); /* Some internal modems need this time */ 96451078Speter irqmap[1] = isa_irq_pending(); 96560471Snyan failures[4] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_TXRDY; 96651078Speter DELAY(1000); /* XXX */ 96751078Speter irqmap[2] = isa_irq_pending(); 96860471Snyan failures[6] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 96951078Speter 97051078Speter /* 97151078Speter * Turn off all device interrupts and check that they go off properly. 97251078Speter * Leave MCR_IENABLE alone. For ports without a master port, it gates 97351078Speter * the OUT2 output of the UART to 97451078Speter * the ICU input. Closing the gate would give a floating ICU input 97551078Speter * (unless there is another device driving it) and spurious interrupts. 97651078Speter * (On the system that this was first tested on, the input floats high 97751078Speter * and gives a (masked) interrupt as soon as the gate is closed.) 97851078Speter */ 97960471Snyan sio_setreg(com, com_ier, 0); 98060471Snyan sio_setreg(com, com_cfcr, CFCR_8BITS); /* dummy to avoid bus echo */ 98160471Snyan failures[7] = sio_getreg(com, com_ier); 98251078Speter DELAY(1000); /* XXX */ 98351078Speter irqmap[3] = isa_irq_pending(); 98460471Snyan failures[9] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 98551078Speter 98651078Speter enable_intr(); 98751078Speter 98851078Speter irqs = irqmap[1] & ~irqmap[0]; 98954194Speter if (bus_get_resource(idev, SYS_RES_IRQ, 0, &xirq, NULL) == 0 && 99054194Speter ((1 << xirq) & irqs) == 0) 99151078Speter printf( 99254206Speter "sio%d: configured irq %ld not in bitmap of probed irqs %#x\n", 99353344Speter device_get_unit(dev), xirq, irqs); 99451078Speter if (bootverbose) 99551078Speter printf("sio%d: irq maps: %#x %#x %#x %#x\n", 99651078Speter device_get_unit(dev), 99751078Speter irqmap[0], irqmap[1], irqmap[2], irqmap[3]); 99851078Speter 99951078Speter result = 0; 100051078Speter for (fn = 0; fn < sizeof failures; ++fn) 100151078Speter if (failures[fn]) { 100260471Snyan sio_setreg(com, com_mcr, 0); 100351078Speter result = ENXIO; 100451078Speter if (bootverbose) { 100551078Speter printf("sio%d: probe failed test(s):", 100651078Speter device_get_unit(dev)); 100751078Speter for (fn = 0; fn < sizeof failures; ++fn) 100851078Speter if (failures[fn]) 100951078Speter printf(" %d", fn); 101051078Speter printf("\n"); 101151078Speter } 101251078Speter break; 101351078Speter } 101451078Speter bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 101551078Speter return (iobase == siocniobase ? 0 : result); 101651078Speter} 101751078Speter 101851078Speter#ifdef COM_ESP 101951078Speterstatic int 102051078Speterespattach(com, esp_port) 102151078Speter struct com_s *com; 102251078Speter Port_t esp_port; 102351078Speter{ 102451078Speter u_char dips; 102551078Speter u_char val; 102651078Speter 102751078Speter /* 102851078Speter * Check the ESP-specific I/O port to see if we're an ESP 102951078Speter * card. If not, return failure immediately. 103051078Speter */ 103151078Speter if ((inb(esp_port) & 0xf3) == 0) { 103251078Speter printf(" port 0x%x is not an ESP board?\n", esp_port); 103351078Speter return (0); 103451078Speter } 103551078Speter 103651078Speter /* 103751078Speter * We've got something that claims to be a Hayes ESP card. 103851078Speter * Let's hope so. 103951078Speter */ 104051078Speter 104151078Speter /* Get the dip-switch configuration */ 104251078Speter outb(esp_port + ESP_CMD1, ESP_GETDIPS); 104351078Speter dips = inb(esp_port + ESP_STATUS1); 104451078Speter 104551078Speter /* 104651078Speter * Bits 0,1 of dips say which COM port we are. 104751078Speter */ 104860471Snyan if (rman_get_start(com->ioportres) == likely_com_ports[dips & 0x03]) 104951078Speter printf(" : ESP"); 105051078Speter else { 105151078Speter printf(" esp_port has com %d\n", dips & 0x03); 105251078Speter return (0); 105351078Speter } 105451078Speter 105551078Speter /* 105651078Speter * Check for ESP version 2.0 or later: bits 4,5,6 = 010. 105751078Speter */ 105851078Speter outb(esp_port + ESP_CMD1, ESP_GETTEST); 105951078Speter val = inb(esp_port + ESP_STATUS1); /* clear reg 1 */ 106051078Speter val = inb(esp_port + ESP_STATUS2); 106151078Speter if ((val & 0x70) < 0x20) { 106251078Speter printf("-old (%o)", val & 0x70); 106351078Speter return (0); 106451078Speter } 106551078Speter 106651078Speter /* 106751078Speter * Check for ability to emulate 16550: bit 7 == 1 106851078Speter */ 106951078Speter if ((dips & 0x80) == 0) { 107051078Speter printf(" slave"); 107151078Speter return (0); 107251078Speter } 107351078Speter 107451078Speter /* 107551078Speter * Okay, we seem to be a Hayes ESP card. Whee. 107651078Speter */ 107751078Speter com->esp = TRUE; 107851078Speter com->esp_port = esp_port; 107951078Speter return (1); 108051078Speter} 108151078Speter#endif /* COM_ESP */ 108251078Speter 108351078Speterstatic int 108452471Simpsio_isa_attach(dev) 108552471Simp device_t dev; 108652471Simp{ 108758885Simp return (sioattach(dev, 0)); 108852471Simp} 108952471Simp 109052471Simpstatic int 109158885Simpsioattach(dev, xrid) 109251078Speter device_t dev; 109358885Simp int xrid; 109451078Speter{ 109551078Speter struct com_s *com; 109651078Speter#ifdef COM_ESP 109751078Speter Port_t *espp; 109851078Speter#endif 109951078Speter Port_t iobase; 110051078Speter int unit; 110153344Speter u_int flags; 110251078Speter int rid; 110351078Speter struct resource *port; 110453344Speter int ret; 110551078Speter 110658885Simp rid = xrid; 110751078Speter port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 110851078Speter 0, ~0, IO_COMSIZE, RF_ACTIVE); 110951078Speter if (!port) 111057915Simp return (ENXIO); 111151078Speter 111251078Speter iobase = rman_get_start(port); 111351078Speter unit = device_get_unit(dev); 111451078Speter com = device_get_softc(dev); 111553344Speter flags = device_get_flags(dev); 111651078Speter 111753344Speter if (unit >= sio_numunits) 111853344Speter sio_numunits = unit + 1; 111951078Speter /* 112051078Speter * sioprobe() has initialized the device registers as follows: 112151078Speter * o cfcr = CFCR_8BITS. 112251078Speter * It is most important that CFCR_DLAB is off, so that the 112351078Speter * data port is not hidden when we enable interrupts. 112451078Speter * o ier = 0. 112551078Speter * Interrupts are only enabled when the line is open. 112651078Speter * o mcr = MCR_IENABLE, or 0 if the port has AST/4 compatible 112751078Speter * interrupt control register or the config specifies no irq. 112851078Speter * Keeping MCR_DTR and MCR_RTS off might stop the external 112951078Speter * device from sending before we are ready. 113051078Speter */ 113151078Speter bzero(com, sizeof *com); 113251078Speter com->unit = unit; 113351078Speter com->ioportres = port; 113460471Snyan com->bst = rman_get_bustag(port); 113560471Snyan com->bsh = rman_get_bushandle(port); 113651078Speter com->cfcr_image = CFCR_8BITS; 113751078Speter com->dtr_wait = 3 * hz; 113851078Speter com->loses_outints = COM_LOSESOUTINTS(flags) != 0; 113957234Sbde com->no_irq = bus_get_resource(dev, SYS_RES_IRQ, 0, NULL, NULL) != 0; 114051078Speter com->tx_fifo_size = 1; 114151078Speter com->obufs[0].l_head = com->obuf1; 114251078Speter com->obufs[1].l_head = com->obuf2; 114351078Speter 114451078Speter com->data_port = iobase + com_data; 114551078Speter com->int_id_port = iobase + com_iir; 114651078Speter com->modem_ctl_port = iobase + com_mcr; 114751078Speter com->mcr_image = inb(com->modem_ctl_port); 114851078Speter com->line_status_port = iobase + com_lsr; 114951078Speter com->modem_status_port = iobase + com_msr; 115051078Speter com->intr_ctl_port = iobase + com_ier; 115151078Speter 115251078Speter /* 115351078Speter * We don't use all the flags from <sys/ttydefaults.h> since they 115451078Speter * are only relevant for logins. It's important to have echo off 115551078Speter * initially so that the line doesn't start blathering before the 115651078Speter * echo flag can be turned off. 115751078Speter */ 115851078Speter com->it_in.c_iflag = 0; 115951078Speter com->it_in.c_oflag = 0; 116051078Speter com->it_in.c_cflag = TTYDEF_CFLAG; 116151078Speter com->it_in.c_lflag = 0; 116251078Speter if (unit == comconsole) { 116351078Speter com->it_in.c_iflag = TTYDEF_IFLAG; 116451078Speter com->it_in.c_oflag = TTYDEF_OFLAG; 116551078Speter com->it_in.c_cflag = TTYDEF_CFLAG | CLOCAL; 116651078Speter com->it_in.c_lflag = TTYDEF_LFLAG; 116751078Speter com->lt_out.c_cflag = com->lt_in.c_cflag = CLOCAL; 116851078Speter com->lt_out.c_ispeed = com->lt_out.c_ospeed = 116951078Speter com->lt_in.c_ispeed = com->lt_in.c_ospeed = 117051078Speter com->it_in.c_ispeed = com->it_in.c_ospeed = comdefaultrate; 117151078Speter } else 117251078Speter com->it_in.c_ispeed = com->it_in.c_ospeed = TTYDEF_SPEED; 117351078Speter if (siosetwater(com, com->it_in.c_ispeed) != 0) { 117451078Speter enable_intr(); 117556788Sbde /* 117656788Sbde * Leave i/o resources allocated if this is a `cn'-level 117756788Sbde * console, so that other devices can't snarf them. 117856788Sbde */ 117956788Sbde if (iobase != siocniobase) 118056788Sbde bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 118156788Sbde return (ENOMEM); 118251078Speter } 118351078Speter enable_intr(); 118451078Speter termioschars(&com->it_in); 118551078Speter com->it_out = com->it_in; 118651078Speter 118751078Speter /* attempt to determine UART type */ 118851078Speter printf("sio%d: type", unit); 118951078Speter 119051078Speter 119151078Speter#ifdef COM_MULTIPORT 119251078Speter if (!COM_ISMULTIPORT(flags) && !COM_IIR_TXRDYBUG(flags)) 119351078Speter#else 119451078Speter if (!COM_IIR_TXRDYBUG(flags)) 119551078Speter#endif 119651078Speter { 119751078Speter u_char scr; 119851078Speter u_char scr1; 119951078Speter u_char scr2; 120051078Speter 120160471Snyan scr = sio_getreg(com, com_scr); 120260471Snyan sio_setreg(com, com_scr, 0xa5); 120360471Snyan scr1 = sio_getreg(com, com_scr); 120460471Snyan sio_setreg(com, com_scr, 0x5a); 120560471Snyan scr2 = sio_getreg(com, com_scr); 120660471Snyan sio_setreg(com, com_scr, scr); 120751078Speter if (scr1 != 0xa5 || scr2 != 0x5a) { 120851078Speter printf(" 8250"); 120951078Speter goto determined_type; 121051078Speter } 121151078Speter } 121260471Snyan sio_setreg(com, com_fifo, FIFO_ENABLE | FIFO_RX_HIGH); 121351078Speter DELAY(100); 121451078Speter com->st16650a = 0; 121551078Speter switch (inb(com->int_id_port) & IIR_FIFO_MASK) { 121651078Speter case FIFO_RX_LOW: 121751078Speter printf(" 16450"); 121851078Speter break; 121951078Speter case FIFO_RX_MEDL: 122051078Speter printf(" 16450?"); 122151078Speter break; 122251078Speter case FIFO_RX_MEDH: 122351078Speter printf(" 16550?"); 122451078Speter break; 122551078Speter case FIFO_RX_HIGH: 122651078Speter if (COM_NOFIFO(flags)) { 122751078Speter printf(" 16550A fifo disabled"); 122851078Speter } else { 122951078Speter com->hasfifo = TRUE; 123051078Speter if (COM_ST16650A(flags)) { 123151078Speter com->st16650a = 1; 123251078Speter com->tx_fifo_size = 32; 123351078Speter printf(" ST16650A"); 123451078Speter } else { 123551078Speter com->tx_fifo_size = COM_FIFOSIZE(flags); 123651078Speter printf(" 16550A"); 123751078Speter } 123851078Speter } 123951078Speter#ifdef COM_ESP 124051078Speter for (espp = likely_esp_ports; *espp != 0; espp++) 124151078Speter if (espattach(com, *espp)) { 124251078Speter com->tx_fifo_size = 1024; 124351078Speter break; 124451078Speter } 124551078Speter#endif 124651078Speter if (!com->st16650a) { 124751078Speter if (!com->tx_fifo_size) 124851078Speter com->tx_fifo_size = 16; 124951078Speter else 125051078Speter printf(" lookalike with %d bytes FIFO", 125151078Speter com->tx_fifo_size); 125251078Speter } 125351078Speter 125451078Speter break; 125551078Speter } 125651078Speter 125751078Speter#ifdef COM_ESP 125851078Speter if (com->esp) { 125951078Speter /* 126051078Speter * Set 16550 compatibility mode. 126151078Speter * We don't use the ESP_MODE_SCALE bit to increase the 126251078Speter * fifo trigger levels because we can't handle large 126351078Speter * bursts of input. 126451078Speter * XXX flow control should be set in comparam(), not here. 126551078Speter */ 126651078Speter outb(com->esp_port + ESP_CMD1, ESP_SETMODE); 126751078Speter outb(com->esp_port + ESP_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO); 126851078Speter 126951078Speter /* Set RTS/CTS flow control. */ 127051078Speter outb(com->esp_port + ESP_CMD1, ESP_SETFLOWTYPE); 127151078Speter outb(com->esp_port + ESP_CMD2, ESP_FLOW_RTS); 127251078Speter outb(com->esp_port + ESP_CMD2, ESP_FLOW_CTS); 127351078Speter 127451078Speter /* Set flow-control levels. */ 127551078Speter outb(com->esp_port + ESP_CMD1, ESP_SETRXFLOW); 127651078Speter outb(com->esp_port + ESP_CMD2, HIBYTE(768)); 127751078Speter outb(com->esp_port + ESP_CMD2, LOBYTE(768)); 127851078Speter outb(com->esp_port + ESP_CMD2, HIBYTE(512)); 127951078Speter outb(com->esp_port + ESP_CMD2, LOBYTE(512)); 128051078Speter } 128151078Speter#endif /* COM_ESP */ 128260471Snyan sio_setreg(com, com_fifo, 0); 128351078Speterdetermined_type: ; 128451078Speter 128551078Speter#ifdef COM_MULTIPORT 128651078Speter if (COM_ISMULTIPORT(flags)) { 128753344Speter device_t masterdev; 128853344Speter 128951078Speter com->multiport = TRUE; 129051078Speter printf(" (multiport"); 129151078Speter if (unit == COM_MPMASTER(flags)) 129251078Speter printf(" master"); 129351078Speter printf(")"); 129453344Speter masterdev = devclass_get_device(sio_devclass, 129553344Speter COM_MPMASTER(flags)); 129657234Sbde com->no_irq = (masterdev == NULL || bus_get_resource(masterdev, 129757234Sbde SYS_RES_IRQ, 0, NULL, NULL) != 0); 129851078Speter } 129951078Speter#endif /* COM_MULTIPORT */ 130051078Speter if (unit == comconsole) 130151078Speter printf(", console"); 130253344Speter if (COM_IIR_TXRDYBUG(flags)) 130351078Speter printf(" with a bogus IIR_TXRDY register"); 130451078Speter printf("\n"); 130551078Speter 130651078Speter if (!sio_registered) { 130751078Speter register_swi(SWI_TTY, siopoll); 130851078Speter sio_registered = TRUE; 130951078Speter } 131051078Speter make_dev(&sio_cdevsw, unit, 131151078Speter UID_ROOT, GID_WHEEL, 0600, "ttyd%r", unit); 131251078Speter make_dev(&sio_cdevsw, unit | CONTROL_INIT_STATE, 131351078Speter UID_ROOT, GID_WHEEL, 0600, "ttyid%r", unit); 131451078Speter make_dev(&sio_cdevsw, unit | CONTROL_LOCK_STATE, 131551078Speter UID_ROOT, GID_WHEEL, 0600, "ttyld%r", unit); 131651078Speter make_dev(&sio_cdevsw, unit | CALLOUT_MASK, 131751078Speter UID_UUCP, GID_DIALER, 0660, "cuaa%r", unit); 131851078Speter make_dev(&sio_cdevsw, unit | CALLOUT_MASK | CONTROL_INIT_STATE, 131951078Speter UID_UUCP, GID_DIALER, 0660, "cuaia%r", unit); 132051078Speter make_dev(&sio_cdevsw, unit | CALLOUT_MASK | CONTROL_LOCK_STATE, 132151078Speter UID_UUCP, GID_DIALER, 0660, "cuala%r", unit); 132251078Speter com->flags = flags; 132351078Speter com->pps.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR; 132451078Speter pps_init(&com->pps); 132551078Speter 132651078Speter rid = 0; 132751078Speter com->irqres = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0ul, ~0ul, 1, 132853344Speter RF_ACTIVE); 132953344Speter if (com->irqres) { 133053344Speter ret = BUS_SETUP_INTR(device_get_parent(dev), dev, com->irqres, 133154194Speter INTR_TYPE_TTY | INTR_TYPE_FAST, 133254386Simp siointr, com, &com->cookie); 133354194Speter if (ret) { 133454194Speter ret = BUS_SETUP_INTR(device_get_parent(dev), dev, 133554194Speter com->irqres, INTR_TYPE_TTY, 133654386Simp siointr, com, &com->cookie); 133754194Speter if (ret == 0) 133854194Speter device_printf(dev, "unable to activate interrupt in fast mode - using normal mode"); 133954194Speter } 134053344Speter if (ret) 134153344Speter device_printf(dev, "could not activate interrupt\n"); 134253344Speter } 134351078Speter 134451078Speter return (0); 134551078Speter} 134651078Speter 134751078Speterstatic int 134851078Spetersioopen(dev, flag, mode, p) 134951078Speter dev_t dev; 135051078Speter int flag; 135151078Speter int mode; 135251078Speter struct proc *p; 135351078Speter{ 135451078Speter struct com_s *com; 135551078Speter int error; 135651078Speter int mynor; 135751078Speter int s; 135851078Speter struct tty *tp; 135951078Speter int unit; 136051078Speter 136151078Speter mynor = minor(dev); 136251078Speter unit = MINOR_TO_UNIT(mynor); 136353344Speter com = com_addr(unit); 136453344Speter if (com == NULL) 136551078Speter return (ENXIO); 136651078Speter if (com->gone) 136751078Speter return (ENXIO); 136851078Speter if (mynor & CONTROL_MASK) 136951078Speter return (0); 137051078Speter tp = dev->si_tty = com->tp = ttymalloc(com->tp); 137151078Speter s = spltty(); 137251078Speter /* 137351078Speter * We jump to this label after all non-interrupted sleeps to pick 137451078Speter * up any changes of the device state. 137551078Speter */ 137651078Speteropen_top: 137751078Speter while (com->state & CS_DTR_OFF) { 137851078Speter error = tsleep(&com->dtr_wait, TTIPRI | PCATCH, "siodtr", 0); 137951078Speter if (com_addr(unit) == NULL) 138051078Speter return (ENXIO); 138151078Speter if (error != 0 || com->gone) 138251078Speter goto out; 138351078Speter } 138451078Speter if (tp->t_state & TS_ISOPEN) { 138551078Speter /* 138651078Speter * The device is open, so everything has been initialized. 138751078Speter * Handle conflicts. 138851078Speter */ 138951078Speter if (mynor & CALLOUT_MASK) { 139051078Speter if (!com->active_out) { 139151078Speter error = EBUSY; 139251078Speter goto out; 139351078Speter } 139451078Speter } else { 139551078Speter if (com->active_out) { 139651078Speter if (flag & O_NONBLOCK) { 139751078Speter error = EBUSY; 139851078Speter goto out; 139951078Speter } 140051078Speter error = tsleep(&com->active_out, 140151078Speter TTIPRI | PCATCH, "siobi", 0); 140251078Speter if (com_addr(unit) == NULL) 140351078Speter return (ENXIO); 140451078Speter if (error != 0 || com->gone) 140551078Speter goto out; 140651078Speter goto open_top; 140751078Speter } 140851078Speter } 140951078Speter if (tp->t_state & TS_XCLUDE && 141051078Speter suser(p)) { 141151078Speter error = EBUSY; 141251078Speter goto out; 141351078Speter } 141451078Speter } else { 141551078Speter /* 141651078Speter * The device isn't open, so there are no conflicts. 141751078Speter * Initialize it. Initialization is done twice in many 141851078Speter * cases: to preempt sleeping callin opens if we are 141951078Speter * callout, and to complete a callin open after DCD rises. 142051078Speter */ 142151078Speter tp->t_oproc = comstart; 142251078Speter tp->t_param = comparam; 142351654Sphk tp->t_stop = comstop; 142451078Speter tp->t_dev = dev; 142551078Speter tp->t_termios = mynor & CALLOUT_MASK 142651078Speter ? com->it_out : com->it_in; 142751078Speter (void)commctl(com, TIOCM_DTR | TIOCM_RTS, DMSET); 142851078Speter com->poll = com->no_irq; 142951078Speter com->poll_output = com->loses_outints; 143051078Speter ++com->wopeners; 143151078Speter error = comparam(tp, &tp->t_termios); 143251078Speter --com->wopeners; 143351078Speter if (error != 0) 143451078Speter goto out; 143551078Speter /* 143651078Speter * XXX we should goto open_top if comparam() slept. 143751078Speter */ 143851078Speter if (com->hasfifo) { 143951078Speter /* 144051078Speter * (Re)enable and drain fifos. 144151078Speter * 144251078Speter * Certain SMC chips cause problems if the fifos 144351078Speter * are enabled while input is ready. Turn off the 144451078Speter * fifo if necessary to clear the input. We test 144551078Speter * the input ready bit after enabling the fifos 144651078Speter * since we've already enabled them in comparam() 144751078Speter * and to handle races between enabling and fresh 144851078Speter * input. 144951078Speter */ 145051078Speter while (TRUE) { 145160471Snyan sio_setreg(com, com_fifo, 145260471Snyan FIFO_RCV_RST | FIFO_XMT_RST 145360471Snyan | com->fifo_image); 145451078Speter /* 145551078Speter * XXX the delays are for superstitious 145651078Speter * historical reasons. It must be less than 145751078Speter * the character time at the maximum 145851078Speter * supported speed (87 usec at 115200 bps 145951078Speter * 8N1). Otherwise we might loop endlessly 146051078Speter * if data is streaming in. We used to use 146151078Speter * delays of 100. That usually worked 146251078Speter * because DELAY(100) used to usually delay 146351078Speter * for about 85 usec instead of 100. 146451078Speter */ 146551078Speter DELAY(50); 146651078Speter if (!(inb(com->line_status_port) & LSR_RXRDY)) 146751078Speter break; 146860471Snyan sio_setreg(com, com_fifo, 0); 146951078Speter DELAY(50); 147051078Speter (void) inb(com->data_port); 147151078Speter } 147251078Speter } 147351078Speter 147451078Speter disable_intr(); 147551078Speter (void) inb(com->line_status_port); 147651078Speter (void) inb(com->data_port); 147751078Speter com->prev_modem_status = com->last_modem_status 147851078Speter = inb(com->modem_status_port); 147951078Speter if (COM_IIR_TXRDYBUG(com->flags)) { 148051078Speter outb(com->intr_ctl_port, IER_ERXRDY | IER_ERLS 148151078Speter | IER_EMSC); 148251078Speter } else { 148351078Speter outb(com->intr_ctl_port, IER_ERXRDY | IER_ETXRDY 148451078Speter | IER_ERLS | IER_EMSC); 148551078Speter } 148651078Speter enable_intr(); 148751078Speter /* 148851078Speter * Handle initial DCD. Callout devices get a fake initial 148951078Speter * DCD (trapdoor DCD). If we are callout, then any sleeping 149051078Speter * callin opens get woken up and resume sleeping on "siobi" 149151078Speter * instead of "siodcd". 149251078Speter */ 149351078Speter /* 149451078Speter * XXX `mynor & CALLOUT_MASK' should be 149551078Speter * `tp->t_cflag & (SOFT_CARRIER | TRAPDOOR_CARRIER) where 149651078Speter * TRAPDOOR_CARRIER is the default initial state for callout 149751078Speter * devices and SOFT_CARRIER is like CLOCAL except it hides 149851078Speter * the true carrier. 149951078Speter */ 150051078Speter if (com->prev_modem_status & MSR_DCD || mynor & CALLOUT_MASK) 150151078Speter (*linesw[tp->t_line].l_modem)(tp, 1); 150251078Speter } 150351078Speter /* 150451078Speter * Wait for DCD if necessary. 150551078Speter */ 150651078Speter if (!(tp->t_state & TS_CARR_ON) && !(mynor & CALLOUT_MASK) 150751078Speter && !(tp->t_cflag & CLOCAL) && !(flag & O_NONBLOCK)) { 150851078Speter ++com->wopeners; 150951078Speter error = tsleep(TSA_CARR_ON(tp), TTIPRI | PCATCH, "siodcd", 0); 151051078Speter if (com_addr(unit) == NULL) 151151078Speter return (ENXIO); 151251078Speter --com->wopeners; 151351078Speter if (error != 0 || com->gone) 151451078Speter goto out; 151551078Speter goto open_top; 151651078Speter } 151751078Speter error = (*linesw[tp->t_line].l_open)(dev, tp); 151851078Speter disc_optim(tp, &tp->t_termios, com); 151951078Speter if (tp->t_state & TS_ISOPEN && mynor & CALLOUT_MASK) 152051078Speter com->active_out = TRUE; 152151078Speter siosettimeout(); 152251078Speterout: 152351078Speter splx(s); 152451078Speter if (!(tp->t_state & TS_ISOPEN) && com->wopeners == 0) 152551078Speter comhardclose(com); 152651078Speter return (error); 152751078Speter} 152851078Speter 152951078Speterstatic int 153051078Spetersioclose(dev, flag, mode, p) 153151078Speter dev_t dev; 153251078Speter int flag; 153351078Speter int mode; 153451078Speter struct proc *p; 153551078Speter{ 153651078Speter struct com_s *com; 153751078Speter int mynor; 153851078Speter int s; 153951078Speter struct tty *tp; 154051078Speter 154151078Speter mynor = minor(dev); 154251078Speter if (mynor & CONTROL_MASK) 154351078Speter return (0); 154451078Speter com = com_addr(MINOR_TO_UNIT(mynor)); 154557915Simp if (com == NULL) 154657915Simp return (ENODEV); 154751078Speter tp = com->tp; 154851078Speter s = spltty(); 154951078Speter (*linesw[tp->t_line].l_close)(tp, flag); 155051078Speter disc_optim(tp, &tp->t_termios, com); 155151654Sphk comstop(tp, FREAD | FWRITE); 155251078Speter comhardclose(com); 155351078Speter ttyclose(tp); 155451078Speter siosettimeout(); 155551078Speter splx(s); 155651078Speter if (com->gone) { 155751078Speter printf("sio%d: gone\n", com->unit); 155851078Speter s = spltty(); 155951078Speter if (com->ibuf != NULL) 156051078Speter free(com->ibuf, M_DEVBUF); 156151078Speter bzero(tp, sizeof *tp); 156251078Speter splx(s); 156351078Speter } 156451078Speter return (0); 156551078Speter} 156651078Speter 156751078Speterstatic void 156851078Spetercomhardclose(com) 156951078Speter struct com_s *com; 157051078Speter{ 157151078Speter int s; 157251078Speter struct tty *tp; 157351078Speter int unit; 157451078Speter 157551078Speter unit = com->unit; 157651078Speter s = spltty(); 157751078Speter com->poll = FALSE; 157851078Speter com->poll_output = FALSE; 157951078Speter com->do_timestamp = FALSE; 158051078Speter com->do_dcd_timestamp = FALSE; 158151078Speter com->pps.ppsparam.mode = 0; 158260471Snyan sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 158351078Speter { 158460471Snyan sio_setreg(com, com_ier, 0); 158551078Speter tp = com->tp; 158651078Speter if (tp->t_cflag & HUPCL 158751078Speter /* 158851078Speter * XXX we will miss any carrier drop between here and the 158951078Speter * next open. Perhaps we should watch DCD even when the 159051078Speter * port is closed; it is not sufficient to check it at 159151078Speter * the next open because it might go up and down while 159251078Speter * we're not watching. 159351078Speter */ 159451078Speter || (!com->active_out 159551078Speter && !(com->prev_modem_status & MSR_DCD) 159651078Speter && !(com->it_in.c_cflag & CLOCAL)) 159751078Speter || !(tp->t_state & TS_ISOPEN)) { 159851078Speter (void)commctl(com, TIOCM_DTR, DMBIC); 159951078Speter if (com->dtr_wait != 0 && !(com->state & CS_DTR_OFF)) { 160051078Speter timeout(siodtrwakeup, com, com->dtr_wait); 160151078Speter com->state |= CS_DTR_OFF; 160251078Speter } 160351078Speter } 160451078Speter } 160551078Speter if (com->hasfifo) { 160651078Speter /* 160751078Speter * Disable fifos so that they are off after controlled 160851078Speter * reboots. Some BIOSes fail to detect 16550s when the 160951078Speter * fifos are enabled. 161051078Speter */ 161160471Snyan sio_setreg(com, com_fifo, 0); 161251078Speter } 161351078Speter com->active_out = FALSE; 161451078Speter wakeup(&com->active_out); 161551078Speter wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */ 161651078Speter splx(s); 161751078Speter} 161851078Speter 161951078Speterstatic int 162051078Spetersioread(dev, uio, flag) 162151078Speter dev_t dev; 162251078Speter struct uio *uio; 162351078Speter int flag; 162451078Speter{ 162551078Speter int mynor; 162651078Speter struct com_s *com; 162751078Speter 162851078Speter mynor = minor(dev); 162951078Speter if (mynor & CONTROL_MASK) 163051078Speter return (ENODEV); 163151078Speter com = com_addr(MINOR_TO_UNIT(mynor)); 163257915Simp if (com == NULL || com->gone) 163351078Speter return (ENODEV); 163451078Speter return ((*linesw[com->tp->t_line].l_read)(com->tp, uio, flag)); 163551078Speter} 163651078Speter 163751078Speterstatic int 163851078Spetersiowrite(dev, uio, flag) 163951078Speter dev_t dev; 164051078Speter struct uio *uio; 164151078Speter int flag; 164251078Speter{ 164351078Speter int mynor; 164451078Speter struct com_s *com; 164551078Speter int unit; 164651078Speter 164751078Speter mynor = minor(dev); 164851078Speter if (mynor & CONTROL_MASK) 164951078Speter return (ENODEV); 165051078Speter 165151078Speter unit = MINOR_TO_UNIT(mynor); 165251078Speter com = com_addr(unit); 165357915Simp if (com == NULL || com->gone) 165451078Speter return (ENODEV); 165551078Speter /* 165651078Speter * (XXX) We disallow virtual consoles if the physical console is 165751078Speter * a serial port. This is in case there is a display attached that 165851078Speter * is not the console. In that situation we don't need/want the X 165951078Speter * server taking over the console. 166051078Speter */ 166151078Speter if (constty != NULL && unit == comconsole) 166251078Speter constty = NULL; 166351078Speter return ((*linesw[com->tp->t_line].l_write)(com->tp, uio, flag)); 166451078Speter} 166551078Speter 166651078Speterstatic void 166751078Spetersiobusycheck(chan) 166851078Speter void *chan; 166951078Speter{ 167051078Speter struct com_s *com; 167151078Speter int s; 167251078Speter 167351078Speter com = (struct com_s *)chan; 167451078Speter 167551078Speter /* 167651078Speter * Clear TS_BUSY if low-level output is complete. 167751078Speter * spl locking is sufficient because siointr1() does not set CS_BUSY. 167851078Speter * If siointr1() clears CS_BUSY after we look at it, then we'll get 167951078Speter * called again. Reading the line status port outside of siointr1() 168051078Speter * is safe because CS_BUSY is clear so there are no output interrupts 168151078Speter * to lose. 168251078Speter */ 168351078Speter s = spltty(); 168451078Speter if (com->state & CS_BUSY) 168551078Speter com->extra_state &= ~CSE_BUSYCHECK; /* False alarm. */ 168651078Speter else if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) 168751078Speter == (LSR_TSRE | LSR_TXRDY)) { 168851078Speter com->tp->t_state &= ~TS_BUSY; 168951078Speter ttwwakeup(com->tp); 169051078Speter com->extra_state &= ~CSE_BUSYCHECK; 169151078Speter } else 169251078Speter timeout(siobusycheck, com, hz / 100); 169351078Speter splx(s); 169451078Speter} 169551078Speter 169651078Speterstatic void 169751078Spetersiodtrwakeup(chan) 169851078Speter void *chan; 169951078Speter{ 170051078Speter struct com_s *com; 170151078Speter 170251078Speter com = (struct com_s *)chan; 170351078Speter com->state &= ~CS_DTR_OFF; 170451078Speter wakeup(&com->dtr_wait); 170551078Speter} 170651078Speter 170751078Speterstatic void 170851078Spetersioinput(com) 170951078Speter struct com_s *com; 171051078Speter{ 171151078Speter u_char *buf; 171251078Speter int incc; 171351078Speter u_char line_status; 171451078Speter int recv_data; 171551078Speter struct tty *tp; 171651078Speter 171751078Speter buf = com->ibuf; 171851078Speter tp = com->tp; 171951078Speter if (!(tp->t_state & TS_ISOPEN) || !(tp->t_cflag & CREAD)) { 172051078Speter com_events -= (com->iptr - com->ibuf); 172151078Speter com->iptr = com->ibuf; 172251078Speter return; 172351078Speter } 172451078Speter if (tp->t_state & TS_CAN_BYPASS_L_RINT) { 172551078Speter /* 172651078Speter * Avoid the grotesquely inefficient lineswitch routine 172751078Speter * (ttyinput) in "raw" mode. It usually takes about 450 172851078Speter * instructions (that's without canonical processing or echo!). 172951078Speter * slinput is reasonably fast (usually 40 instructions plus 173051078Speter * call overhead). 173151078Speter */ 173251078Speter do { 173351078Speter enable_intr(); 173451078Speter incc = com->iptr - buf; 173551078Speter if (tp->t_rawq.c_cc + incc > tp->t_ihiwat 173651078Speter && (com->state & CS_RTS_IFLOW 173751078Speter || tp->t_iflag & IXOFF) 173851078Speter && !(tp->t_state & TS_TBLOCK)) 173951078Speter ttyblock(tp); 174051078Speter com->delta_error_counts[CE_TTY_BUF_OVERFLOW] 174151078Speter += b_to_q((char *)buf, incc, &tp->t_rawq); 174251078Speter buf += incc; 174351078Speter tk_nin += incc; 174451078Speter tk_rawcc += incc; 174551078Speter tp->t_rawcc += incc; 174651078Speter ttwakeup(tp); 174751078Speter if (tp->t_state & TS_TTSTOP 174851078Speter && (tp->t_iflag & IXANY 174951078Speter || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) { 175051078Speter tp->t_state &= ~TS_TTSTOP; 175151078Speter tp->t_lflag &= ~FLUSHO; 175251078Speter comstart(tp); 175351078Speter } 175451078Speter disable_intr(); 175551078Speter } while (buf < com->iptr); 175651078Speter } else { 175751078Speter do { 175851078Speter enable_intr(); 175951078Speter line_status = buf[com->ierroff]; 176051078Speter recv_data = *buf++; 176151078Speter if (line_status 176251078Speter & (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) { 176351078Speter if (line_status & LSR_BI) 176451078Speter recv_data |= TTY_BI; 176551078Speter if (line_status & LSR_FE) 176651078Speter recv_data |= TTY_FE; 176751078Speter if (line_status & LSR_OE) 176851078Speter recv_data |= TTY_OE; 176951078Speter if (line_status & LSR_PE) 177051078Speter recv_data |= TTY_PE; 177151078Speter } 177251078Speter (*linesw[tp->t_line].l_rint)(recv_data, tp); 177351078Speter disable_intr(); 177451078Speter } while (buf < com->iptr); 177551078Speter } 177651078Speter com_events -= (com->iptr - com->ibuf); 177751078Speter com->iptr = com->ibuf; 177851078Speter 177951078Speter /* 178051078Speter * There is now room for another low-level buffer full of input, 178151078Speter * so enable RTS if it is now disabled and there is room in the 178251078Speter * high-level buffer. 178351078Speter */ 178451078Speter if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & MCR_RTS) && 178551078Speter !(tp->t_state & TS_TBLOCK)) 178651078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 178751078Speter} 178851078Speter 178951078Spetervoid 179051078Spetersiointr(arg) 179151078Speter void *arg; 179251078Speter{ 179351078Speter#ifndef COM_MULTIPORT 179451078Speter COM_LOCK(); 179551078Speter siointr1((struct com_s *) arg); 179651078Speter COM_UNLOCK(); 179751078Speter#else /* COM_MULTIPORT */ 179851078Speter bool_t possibly_more_intrs; 179951078Speter int unit; 180051078Speter struct com_s *com; 180151078Speter 180251078Speter /* 180351078Speter * Loop until there is no activity on any port. This is necessary 180451078Speter * to get an interrupt edge more than to avoid another interrupt. 180551078Speter * If the IRQ signal is just an OR of the IRQ signals from several 180651078Speter * devices, then the edge from one may be lost because another is 180751078Speter * on. 180851078Speter */ 180951078Speter COM_LOCK(); 181051078Speter do { 181151078Speter possibly_more_intrs = FALSE; 181253344Speter for (unit = 0; unit < sio_numunits; ++unit) { 181351078Speter com = com_addr(unit); 181451078Speter /* 181551078Speter * XXX COM_LOCK(); 181651078Speter * would it work here, or be counter-productive? 181751078Speter */ 181851078Speter if (com != NULL 181951078Speter && !com->gone 182051078Speter && (inb(com->int_id_port) & IIR_IMASK) 182151078Speter != IIR_NOPEND) { 182251078Speter siointr1(com); 182351078Speter possibly_more_intrs = TRUE; 182451078Speter } 182551078Speter /* XXX COM_UNLOCK(); */ 182651078Speter } 182751078Speter } while (possibly_more_intrs); 182851078Speter COM_UNLOCK(); 182951078Speter#endif /* COM_MULTIPORT */ 183051078Speter} 183151078Speter 183251078Speterstatic void 183351078Spetersiointr1(com) 183451078Speter struct com_s *com; 183551078Speter{ 183651078Speter u_char line_status; 183751078Speter u_char modem_status; 183851078Speter u_char *ioptr; 183951078Speter u_char recv_data; 184051078Speter u_char int_ctl; 184151078Speter u_char int_ctl_new; 184251078Speter struct timecounter *tc; 184351078Speter u_int count; 184451078Speter 184551078Speter int_ctl = inb(com->intr_ctl_port); 184651078Speter int_ctl_new = int_ctl; 184751078Speter 184851078Speter while (!com->gone) { 184951078Speter if (com->pps.ppsparam.mode & PPS_CAPTUREBOTH) { 185051078Speter modem_status = inb(com->modem_status_port); 185151078Speter if ((modem_status ^ com->last_modem_status) & MSR_DCD) { 185251078Speter tc = timecounter; 185351078Speter count = tc->tc_get_timecount(tc); 185451078Speter pps_event(&com->pps, tc, count, 185551078Speter (modem_status & MSR_DCD) ? 185651078Speter PPS_CAPTUREASSERT : PPS_CAPTURECLEAR); 185751078Speter } 185851078Speter } 185951078Speter line_status = inb(com->line_status_port); 186051078Speter 186151078Speter /* input event? (check first to help avoid overruns) */ 186251078Speter while (line_status & LSR_RCV_MASK) { 186351078Speter /* break/unnattached error bits or real input? */ 186451078Speter if (!(line_status & LSR_RXRDY)) 186551078Speter recv_data = 0; 186651078Speter else 186751078Speter recv_data = inb(com->data_port); 186851078Speter if (line_status & (LSR_BI | LSR_FE | LSR_PE)) { 186951078Speter /* 187051078Speter * Don't store BI if IGNBRK or FE/PE if IGNPAR. 187151078Speter * Otherwise, push the work to a higher level 187251078Speter * (to handle PARMRK) if we're bypassing. 187351078Speter * Otherwise, convert BI/FE and PE+INPCK to 0. 187451078Speter * 187551078Speter * This makes bypassing work right in the 187651078Speter * usual "raw" case (IGNBRK set, and IGNPAR 187751078Speter * and INPCK clear). 187851078Speter * 187951078Speter * Note: BI together with FE/PE means just BI. 188051078Speter */ 188151078Speter if (line_status & LSR_BI) { 188251078Speter#if defined(DDB) && defined(BREAK_TO_DEBUGGER) 188351078Speter if (com->unit == comconsole) { 188451078Speter breakpoint(); 188551078Speter goto cont; 188651078Speter } 188751078Speter#endif 188851078Speter if (com->tp == NULL 188951078Speter || com->tp->t_iflag & IGNBRK) 189051078Speter goto cont; 189151078Speter } else { 189251078Speter if (com->tp == NULL 189351078Speter || com->tp->t_iflag & IGNPAR) 189451078Speter goto cont; 189551078Speter } 189651078Speter if (com->tp->t_state & TS_CAN_BYPASS_L_RINT 189751078Speter && (line_status & (LSR_BI | LSR_FE) 189851078Speter || com->tp->t_iflag & INPCK)) 189951078Speter recv_data = 0; 190051078Speter } 190151078Speter ++com->bytes_in; 190251078Speter if (com->hotchar != 0 && recv_data == com->hotchar) 190351078Speter setsofttty(); 190451078Speter ioptr = com->iptr; 190551078Speter if (ioptr >= com->ibufend) 190651078Speter CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW); 190751078Speter else { 190851078Speter if (com->do_timestamp) 190951078Speter microtime(&com->timestamp); 191051078Speter ++com_events; 191151078Speter schedsofttty(); 191251078Speter#if 0 /* for testing input latency vs efficiency */ 191351078Speterif (com->iptr - com->ibuf == 8) 191451078Speter setsofttty(); 191551078Speter#endif 191651078Speter ioptr[0] = recv_data; 191751078Speter ioptr[com->ierroff] = line_status; 191851078Speter com->iptr = ++ioptr; 191951078Speter if (ioptr == com->ihighwater 192051078Speter && com->state & CS_RTS_IFLOW) 192151078Speter outb(com->modem_ctl_port, 192251078Speter com->mcr_image &= ~MCR_RTS); 192351078Speter if (line_status & LSR_OE) 192451078Speter CE_RECORD(com, CE_OVERRUN); 192551078Speter } 192651078Spetercont: 192751078Speter /* 192851078Speter * "& 0x7F" is to avoid the gcc-1.40 generating a slow 192951078Speter * jump from the top of the loop to here 193051078Speter */ 193151078Speter line_status = inb(com->line_status_port) & 0x7F; 193251078Speter } 193351078Speter 193451078Speter /* modem status change? (always check before doing output) */ 193551078Speter modem_status = inb(com->modem_status_port); 193651078Speter if (modem_status != com->last_modem_status) { 193751078Speter if (com->do_dcd_timestamp 193851078Speter && !(com->last_modem_status & MSR_DCD) 193951078Speter && modem_status & MSR_DCD) 194051078Speter microtime(&com->dcd_timestamp); 194151078Speter 194251078Speter /* 194351078Speter * Schedule high level to handle DCD changes. Note 194451078Speter * that we don't use the delta bits anywhere. Some 194551078Speter * UARTs mess them up, and it's easy to remember the 194651078Speter * previous bits and calculate the delta. 194751078Speter */ 194851078Speter com->last_modem_status = modem_status; 194951078Speter if (!(com->state & CS_CHECKMSR)) { 195051078Speter com_events += LOTS_OF_EVENTS; 195151078Speter com->state |= CS_CHECKMSR; 195251078Speter setsofttty(); 195351078Speter } 195451078Speter 195551078Speter /* handle CTS change immediately for crisp flow ctl */ 195651078Speter if (com->state & CS_CTS_OFLOW) { 195751078Speter if (modem_status & MSR_CTS) 195851078Speter com->state |= CS_ODEVREADY; 195951078Speter else 196051078Speter com->state &= ~CS_ODEVREADY; 196151078Speter } 196251078Speter } 196351078Speter 196451078Speter /* output queued and everything ready? */ 196551078Speter if (line_status & LSR_TXRDY 196651078Speter && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { 196751078Speter ioptr = com->obufq.l_head; 196851078Speter if (com->tx_fifo_size > 1) { 196951078Speter u_int ocount; 197051078Speter 197151078Speter ocount = com->obufq.l_tail - ioptr; 197251078Speter if (ocount > com->tx_fifo_size) 197351078Speter ocount = com->tx_fifo_size; 197451078Speter com->bytes_out += ocount; 197551078Speter do 197651078Speter outb(com->data_port, *ioptr++); 197751078Speter while (--ocount != 0); 197851078Speter } else { 197951078Speter outb(com->data_port, *ioptr++); 198051078Speter ++com->bytes_out; 198151078Speter } 198251078Speter com->obufq.l_head = ioptr; 198351078Speter if (COM_IIR_TXRDYBUG(com->flags)) { 198451078Speter int_ctl_new = int_ctl | IER_ETXRDY; 198551078Speter } 198651078Speter if (ioptr >= com->obufq.l_tail) { 198751078Speter struct lbq *qp; 198851078Speter 198951078Speter qp = com->obufq.l_next; 199051078Speter qp->l_queued = FALSE; 199151078Speter qp = qp->l_next; 199251078Speter if (qp != NULL) { 199351078Speter com->obufq.l_head = qp->l_head; 199451078Speter com->obufq.l_tail = qp->l_tail; 199551078Speter com->obufq.l_next = qp; 199651078Speter } else { 199751078Speter /* output just completed */ 199853344Speter if (COM_IIR_TXRDYBUG(com->flags)) { 199951078Speter int_ctl_new = int_ctl & ~IER_ETXRDY; 200051078Speter } 200151078Speter com->state &= ~CS_BUSY; 200251078Speter } 200351078Speter if (!(com->state & CS_ODONE)) { 200451078Speter com_events += LOTS_OF_EVENTS; 200551078Speter com->state |= CS_ODONE; 200651078Speter setsofttty(); /* handle at high level ASAP */ 200751078Speter } 200851078Speter } 200953344Speter if (COM_IIR_TXRDYBUG(com->flags) && (int_ctl != int_ctl_new)) { 201051078Speter outb(com->intr_ctl_port, int_ctl_new); 201151078Speter } 201251078Speter } 201351078Speter 201451078Speter /* finished? */ 201551078Speter#ifndef COM_MULTIPORT 201651078Speter if ((inb(com->int_id_port) & IIR_IMASK) == IIR_NOPEND) 201751078Speter#endif /* COM_MULTIPORT */ 201851078Speter return; 201951078Speter } 202051078Speter} 202151078Speter 202251078Speterstatic int 202351078Spetersioioctl(dev, cmd, data, flag, p) 202451078Speter dev_t dev; 202551078Speter u_long cmd; 202651078Speter caddr_t data; 202751078Speter int flag; 202851078Speter struct proc *p; 202951078Speter{ 203051078Speter struct com_s *com; 203151078Speter int error; 203251078Speter int mynor; 203351078Speter int s; 203451078Speter struct tty *tp; 203551078Speter#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 203651078Speter u_long oldcmd; 203751078Speter struct termios term; 203851078Speter#endif 203951078Speter 204051078Speter mynor = minor(dev); 204151078Speter com = com_addr(MINOR_TO_UNIT(mynor)); 204257915Simp if (com == NULL || com->gone) 204351078Speter return (ENODEV); 204451078Speter if (mynor & CONTROL_MASK) { 204551078Speter struct termios *ct; 204651078Speter 204751078Speter switch (mynor & CONTROL_MASK) { 204851078Speter case CONTROL_INIT_STATE: 204951078Speter ct = mynor & CALLOUT_MASK ? &com->it_out : &com->it_in; 205051078Speter break; 205151078Speter case CONTROL_LOCK_STATE: 205251078Speter ct = mynor & CALLOUT_MASK ? &com->lt_out : &com->lt_in; 205351078Speter break; 205451078Speter default: 205551078Speter return (ENODEV); /* /dev/nodev */ 205651078Speter } 205751078Speter switch (cmd) { 205851078Speter case TIOCSETA: 205951078Speter error = suser(p); 206051078Speter if (error != 0) 206151078Speter return (error); 206251078Speter *ct = *(struct termios *)data; 206351078Speter return (0); 206451078Speter case TIOCGETA: 206551078Speter *(struct termios *)data = *ct; 206651078Speter return (0); 206751078Speter case TIOCGETD: 206851078Speter *(int *)data = TTYDISC; 206951078Speter return (0); 207051078Speter case TIOCGWINSZ: 207151078Speter bzero(data, sizeof(struct winsize)); 207251078Speter return (0); 207351078Speter default: 207451078Speter return (ENOTTY); 207551078Speter } 207651078Speter } 207751078Speter tp = com->tp; 207851078Speter#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 207951078Speter term = tp->t_termios; 208051078Speter oldcmd = cmd; 208151078Speter error = ttsetcompat(tp, &cmd, data, &term); 208251078Speter if (error != 0) 208351078Speter return (error); 208451078Speter if (cmd != oldcmd) 208551078Speter data = (caddr_t)&term; 208651078Speter#endif 208751078Speter if (cmd == TIOCSETA || cmd == TIOCSETAW || cmd == TIOCSETAF) { 208851078Speter int cc; 208951078Speter struct termios *dt = (struct termios *)data; 209051078Speter struct termios *lt = mynor & CALLOUT_MASK 209151078Speter ? &com->lt_out : &com->lt_in; 209251078Speter 209351078Speter dt->c_iflag = (tp->t_iflag & lt->c_iflag) 209451078Speter | (dt->c_iflag & ~lt->c_iflag); 209551078Speter dt->c_oflag = (tp->t_oflag & lt->c_oflag) 209651078Speter | (dt->c_oflag & ~lt->c_oflag); 209751078Speter dt->c_cflag = (tp->t_cflag & lt->c_cflag) 209851078Speter | (dt->c_cflag & ~lt->c_cflag); 209951078Speter dt->c_lflag = (tp->t_lflag & lt->c_lflag) 210051078Speter | (dt->c_lflag & ~lt->c_lflag); 210151078Speter for (cc = 0; cc < NCCS; ++cc) 210251078Speter if (lt->c_cc[cc] != 0) 210351078Speter dt->c_cc[cc] = tp->t_cc[cc]; 210451078Speter if (lt->c_ispeed != 0) 210551078Speter dt->c_ispeed = tp->t_ispeed; 210651078Speter if (lt->c_ospeed != 0) 210751078Speter dt->c_ospeed = tp->t_ospeed; 210851078Speter } 210951078Speter error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); 211051078Speter if (error != ENOIOCTL) 211151078Speter return (error); 211251078Speter s = spltty(); 211351078Speter error = ttioctl(tp, cmd, data, flag); 211451078Speter disc_optim(tp, &tp->t_termios, com); 211551078Speter if (error != ENOIOCTL) { 211651078Speter splx(s); 211751078Speter return (error); 211851078Speter } 211951078Speter switch (cmd) { 212051078Speter case TIOCSBRK: 212160471Snyan sio_setreg(com, com_cfcr, com->cfcr_image |= CFCR_SBREAK); 212251078Speter break; 212351078Speter case TIOCCBRK: 212460471Snyan sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 212551078Speter break; 212651078Speter case TIOCSDTR: 212751078Speter (void)commctl(com, TIOCM_DTR, DMBIS); 212851078Speter break; 212951078Speter case TIOCCDTR: 213051078Speter (void)commctl(com, TIOCM_DTR, DMBIC); 213151078Speter break; 213251078Speter /* 213351078Speter * XXX should disallow changing MCR_RTS if CS_RTS_IFLOW is set. The 213451078Speter * changes get undone on the next call to comparam(). 213551078Speter */ 213651078Speter case TIOCMSET: 213751078Speter (void)commctl(com, *(int *)data, DMSET); 213851078Speter break; 213951078Speter case TIOCMBIS: 214051078Speter (void)commctl(com, *(int *)data, DMBIS); 214151078Speter break; 214251078Speter case TIOCMBIC: 214351078Speter (void)commctl(com, *(int *)data, DMBIC); 214451078Speter break; 214551078Speter case TIOCMGET: 214651078Speter *(int *)data = commctl(com, 0, DMGET); 214751078Speter break; 214851078Speter case TIOCMSDTRWAIT: 214951078Speter /* must be root since the wait applies to following logins */ 215051078Speter error = suser(p); 215151078Speter if (error != 0) { 215251078Speter splx(s); 215351078Speter return (error); 215451078Speter } 215551078Speter com->dtr_wait = *(int *)data * hz / 100; 215651078Speter break; 215751078Speter case TIOCMGDTRWAIT: 215851078Speter *(int *)data = com->dtr_wait * 100 / hz; 215951078Speter break; 216051078Speter case TIOCTIMESTAMP: 216151078Speter com->do_timestamp = TRUE; 216251078Speter *(struct timeval *)data = com->timestamp; 216351078Speter break; 216451078Speter case TIOCDCDTIMESTAMP: 216551078Speter com->do_dcd_timestamp = TRUE; 216651078Speter *(struct timeval *)data = com->dcd_timestamp; 216751078Speter break; 216851078Speter default: 216951078Speter splx(s); 217051078Speter error = pps_ioctl(cmd, data, &com->pps); 217151078Speter if (error == ENODEV) 217251078Speter error = ENOTTY; 217351078Speter return (error); 217451078Speter } 217551078Speter splx(s); 217651078Speter return (0); 217751078Speter} 217851078Speter 217951078Speterstatic void 218051078Spetersiopoll() 218151078Speter{ 218251078Speter int unit; 218351078Speter 218451078Speter if (com_events == 0) 218551078Speter return; 218651078Speterrepeat: 218753344Speter for (unit = 0; unit < sio_numunits; ++unit) { 218851078Speter struct com_s *com; 218951078Speter int incc; 219051078Speter struct tty *tp; 219151078Speter 219251078Speter com = com_addr(unit); 219351078Speter if (com == NULL) 219451078Speter continue; 219551078Speter tp = com->tp; 219651078Speter if (tp == NULL || com->gone) { 219751078Speter /* 219851078Speter * Discard any events related to never-opened or 219951078Speter * going-away devices. 220051078Speter */ 220151078Speter disable_intr(); 220251078Speter incc = com->iptr - com->ibuf; 220351078Speter com->iptr = com->ibuf; 220451078Speter if (com->state & CS_CHECKMSR) { 220551078Speter incc += LOTS_OF_EVENTS; 220651078Speter com->state &= ~CS_CHECKMSR; 220751078Speter } 220851078Speter com_events -= incc; 220951078Speter enable_intr(); 221051078Speter continue; 221151078Speter } 221251078Speter if (com->iptr != com->ibuf) { 221351078Speter disable_intr(); 221451078Speter sioinput(com); 221551078Speter enable_intr(); 221651078Speter } 221751078Speter if (com->state & CS_CHECKMSR) { 221851078Speter u_char delta_modem_status; 221951078Speter 222051078Speter disable_intr(); 222151078Speter delta_modem_status = com->last_modem_status 222251078Speter ^ com->prev_modem_status; 222351078Speter com->prev_modem_status = com->last_modem_status; 222451078Speter com_events -= LOTS_OF_EVENTS; 222551078Speter com->state &= ~CS_CHECKMSR; 222651078Speter enable_intr(); 222751078Speter if (delta_modem_status & MSR_DCD) 222851078Speter (*linesw[tp->t_line].l_modem) 222951078Speter (tp, com->prev_modem_status & MSR_DCD); 223051078Speter } 223151078Speter if (com->state & CS_ODONE) { 223251078Speter disable_intr(); 223351078Speter com_events -= LOTS_OF_EVENTS; 223451078Speter com->state &= ~CS_ODONE; 223551078Speter enable_intr(); 223651078Speter if (!(com->state & CS_BUSY) 223751078Speter && !(com->extra_state & CSE_BUSYCHECK)) { 223851078Speter timeout(siobusycheck, com, hz / 100); 223951078Speter com->extra_state |= CSE_BUSYCHECK; 224051078Speter } 224151078Speter (*linesw[tp->t_line].l_start)(tp); 224251078Speter } 224351078Speter if (com_events == 0) 224451078Speter break; 224551078Speter } 224651078Speter if (com_events >= LOTS_OF_EVENTS) 224751078Speter goto repeat; 224851078Speter} 224951078Speter 225051078Speterstatic int 225151078Spetercomparam(tp, t) 225251078Speter struct tty *tp; 225351078Speter struct termios *t; 225451078Speter{ 225551078Speter u_int cfcr; 225651078Speter int cflag; 225751078Speter struct com_s *com; 225851078Speter int divisor; 225951078Speter u_char dlbh; 226051078Speter u_char dlbl; 226151078Speter int s; 226251078Speter int unit; 226351078Speter 226451078Speter /* do historical conversions */ 226551078Speter if (t->c_ispeed == 0) 226651078Speter t->c_ispeed = t->c_ospeed; 226751078Speter 226851078Speter /* check requested parameters */ 226951078Speter divisor = ttspeedtab(t->c_ospeed, comspeedtab); 227051078Speter if (divisor < 0 || (divisor > 0 && t->c_ispeed != t->c_ospeed)) 227151078Speter return (EINVAL); 227251078Speter 227351078Speter /* parameters are OK, convert them to the com struct and the device */ 227451078Speter unit = DEV_TO_UNIT(tp->t_dev); 227551078Speter com = com_addr(unit); 227657915Simp if (com == NULL) 227757915Simp return (ENODEV); 227851078Speter s = spltty(); 227951078Speter if (divisor == 0) 228051078Speter (void)commctl(com, TIOCM_DTR, DMBIC); /* hang up line */ 228151078Speter else 228251078Speter (void)commctl(com, TIOCM_DTR, DMBIS); 228351078Speter cflag = t->c_cflag; 228451078Speter switch (cflag & CSIZE) { 228551078Speter case CS5: 228651078Speter cfcr = CFCR_5BITS; 228751078Speter break; 228851078Speter case CS6: 228951078Speter cfcr = CFCR_6BITS; 229051078Speter break; 229151078Speter case CS7: 229251078Speter cfcr = CFCR_7BITS; 229351078Speter break; 229451078Speter default: 229551078Speter cfcr = CFCR_8BITS; 229651078Speter break; 229751078Speter } 229851078Speter if (cflag & PARENB) { 229951078Speter cfcr |= CFCR_PENAB; 230051078Speter if (!(cflag & PARODD)) 230151078Speter cfcr |= CFCR_PEVEN; 230251078Speter } 230351078Speter if (cflag & CSTOPB) 230451078Speter cfcr |= CFCR_STOPB; 230551078Speter 230651078Speter if (com->hasfifo && divisor != 0) { 230751078Speter /* 230851078Speter * Use a fifo trigger level low enough so that the input 230951078Speter * latency from the fifo is less than about 16 msec and 231051078Speter * the total latency is less than about 30 msec. These 231151078Speter * latencies are reasonable for humans. Serial comms 231251078Speter * protocols shouldn't expect anything better since modem 231351078Speter * latencies are larger. 231451078Speter */ 231551078Speter com->fifo_image = t->c_ospeed <= 4800 231651078Speter ? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_HIGH; 231751078Speter#ifdef COM_ESP 231851078Speter /* 231951078Speter * The Hayes ESP card needs the fifo DMA mode bit set 232051078Speter * in compatibility mode. If not, it will interrupt 232151078Speter * for each character received. 232251078Speter */ 232351078Speter if (com->esp) 232451078Speter com->fifo_image |= FIFO_DMA_MODE; 232551078Speter#endif 232660471Snyan sio_setreg(com, com_fifo, com->fifo_image); 232751078Speter } 232851078Speter 232951078Speter /* 233051078Speter * This returns with interrupts disabled so that we can complete 233151078Speter * the speed change atomically. Keeping interrupts disabled is 233251078Speter * especially important while com_data is hidden. 233351078Speter */ 233451078Speter (void) siosetwater(com, t->c_ispeed); 233551078Speter 233651078Speter if (divisor != 0) { 233760471Snyan sio_setreg(com, com_cfcr, cfcr | CFCR_DLAB); 233851078Speter /* 233951078Speter * Only set the divisor registers if they would change, 234051078Speter * since on some 16550 incompatibles (UMC8669F), setting 234151078Speter * them while input is arriving them loses sync until 234251078Speter * data stops arriving. 234351078Speter */ 234451078Speter dlbl = divisor & 0xFF; 234560471Snyan if (sio_getreg(com, com_dlbl) != dlbl) 234660471Snyan sio_setreg(com, com_dlbl, dlbl); 234751078Speter dlbh = (u_int) divisor >> 8; 234860471Snyan if (sio_getreg(com, com_dlbh) != dlbh) 234960471Snyan sio_setreg(com, com_dlbh, dlbh); 235051078Speter } 235151078Speter 235260471Snyan sio_setreg(com, com_cfcr, com->cfcr_image = cfcr); 235351078Speter 235451078Speter if (!(tp->t_state & TS_TTSTOP)) 235551078Speter com->state |= CS_TTGO; 235651078Speter 235751078Speter if (cflag & CRTS_IFLOW) { 235851078Speter if (com->st16650a) { 235960471Snyan sio_setreg(com, com_cfcr, 0xbf); 236060471Snyan sio_setreg(com, com_fifo, 236160471Snyan sio_getreg(com, com_fifo) | 0x40); 236251078Speter } 236351078Speter com->state |= CS_RTS_IFLOW; 236451078Speter /* 236551078Speter * If CS_RTS_IFLOW just changed from off to on, the change 236651078Speter * needs to be propagated to MCR_RTS. This isn't urgent, 236751078Speter * so do it later by calling comstart() instead of repeating 236851078Speter * a lot of code from comstart() here. 236951078Speter */ 237051078Speter } else if (com->state & CS_RTS_IFLOW) { 237151078Speter com->state &= ~CS_RTS_IFLOW; 237251078Speter /* 237351078Speter * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS 237451078Speter * on here, since comstart() won't do it later. 237551078Speter */ 237651078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 237751078Speter if (com->st16650a) { 237860471Snyan sio_setreg(com, com_cfcr, 0xbf); 237960471Snyan sio_setreg(com, com_fifo, 238060471Snyan sio_getreg(com, com_fifo) & ~0x40); 238151078Speter } 238251078Speter } 238351078Speter 238451078Speter 238551078Speter /* 238651078Speter * Set up state to handle output flow control. 238751078Speter * XXX - worth handling MDMBUF (DCD) flow control at the lowest level? 238851078Speter * Now has 10+ msec latency, while CTS flow has 50- usec latency. 238951078Speter */ 239051078Speter com->state |= CS_ODEVREADY; 239151078Speter com->state &= ~CS_CTS_OFLOW; 239251078Speter if (cflag & CCTS_OFLOW) { 239351078Speter com->state |= CS_CTS_OFLOW; 239451078Speter if (!(com->last_modem_status & MSR_CTS)) 239551078Speter com->state &= ~CS_ODEVREADY; 239651078Speter if (com->st16650a) { 239760471Snyan sio_setreg(com, com_cfcr, 0xbf); 239860471Snyan sio_setreg(com, com_fifo, 239960471Snyan sio_getreg(com, com_fifo) | 0x80); 240051078Speter } 240151078Speter } else { 240251078Speter if (com->st16650a) { 240360471Snyan sio_setreg(com, com_cfcr, 0xbf); 240460471Snyan sio_setreg(com, com_fifo, 240560471Snyan sio_getreg(com, com_fifo) & ~0x80); 240651078Speter } 240751078Speter } 240851078Speter 240960471Snyan sio_setreg(com, com_cfcr, com->cfcr_image); 241051078Speter 241151078Speter /* XXX shouldn't call functions while intrs are disabled. */ 241251078Speter disc_optim(tp, t, com); 241351078Speter /* 241451078Speter * Recover from fiddling with CS_TTGO. We used to call siointr1() 241551078Speter * unconditionally, but that defeated the careful discarding of 241651078Speter * stale input in sioopen(). 241751078Speter */ 241851078Speter if (com->state >= (CS_BUSY | CS_TTGO)) 241951078Speter siointr1(com); 242051078Speter 242151078Speter enable_intr(); 242251078Speter splx(s); 242351078Speter comstart(tp); 242451078Speter if (com->ibufold != NULL) { 242551078Speter free(com->ibufold, M_DEVBUF); 242651078Speter com->ibufold = NULL; 242751078Speter } 242851078Speter return (0); 242951078Speter} 243051078Speter 243151078Speterstatic int 243251078Spetersiosetwater(com, speed) 243351078Speter struct com_s *com; 243451078Speter speed_t speed; 243551078Speter{ 243651078Speter int cp4ticks; 243751078Speter u_char *ibuf; 243851078Speter int ibufsize; 243951078Speter struct tty *tp; 244051078Speter 244151078Speter /* 244251078Speter * Make the buffer size large enough to handle a softtty interrupt 244351078Speter * latency of about 2 ticks without loss of throughput or data 244451078Speter * (about 3 ticks if input flow control is not used or not honoured, 244551078Speter * but a bit less for CS5-CS7 modes). 244651078Speter */ 244751078Speter cp4ticks = speed / 10 / hz * 4; 244851078Speter for (ibufsize = 128; ibufsize < cp4ticks;) 244951078Speter ibufsize <<= 1; 245051078Speter if (ibufsize == com->ibufsize) { 245151078Speter disable_intr(); 245251078Speter return (0); 245351078Speter } 245451078Speter 245551078Speter /* 245651078Speter * Allocate input buffer. The extra factor of 2 in the size is 245751078Speter * to allow for an error byte for each input byte. 245851078Speter */ 245951078Speter ibuf = malloc(2 * ibufsize, M_DEVBUF, M_NOWAIT); 246051078Speter if (ibuf == NULL) { 246151078Speter disable_intr(); 246251078Speter return (ENOMEM); 246351078Speter } 246451078Speter 246551078Speter /* Initialize non-critical variables. */ 246651078Speter com->ibufold = com->ibuf; 246751078Speter com->ibufsize = ibufsize; 246851078Speter tp = com->tp; 246951078Speter if (tp != NULL) { 247051078Speter tp->t_ififosize = 2 * ibufsize; 247151078Speter tp->t_ispeedwat = (speed_t)-1; 247251078Speter tp->t_ospeedwat = (speed_t)-1; 247351078Speter } 247451078Speter 247551078Speter /* 247651078Speter * Read current input buffer, if any. Continue with interrupts 247751078Speter * disabled. 247851078Speter */ 247951078Speter disable_intr(); 248051078Speter if (com->iptr != com->ibuf) 248151078Speter sioinput(com); 248251078Speter 248351078Speter /*- 248451078Speter * Initialize critical variables, including input buffer watermarks. 248551078Speter * The external device is asked to stop sending when the buffer 248651078Speter * exactly reaches high water, or when the high level requests it. 248751078Speter * The high level is notified immediately (rather than at a later 248851078Speter * clock tick) when this watermark is reached. 248951078Speter * The buffer size is chosen so the watermark should almost never 249051078Speter * be reached. 249151078Speter * The low watermark is invisibly 0 since the buffer is always 249251078Speter * emptied all at once. 249351078Speter */ 249451078Speter com->iptr = com->ibuf = ibuf; 249551078Speter com->ibufend = ibuf + ibufsize; 249651078Speter com->ierroff = ibufsize; 249751078Speter com->ihighwater = ibuf + 3 * ibufsize / 4; 249851078Speter return (0); 249951078Speter} 250051078Speter 250151078Speterstatic void 250251078Spetercomstart(tp) 250351078Speter struct tty *tp; 250451078Speter{ 250551078Speter struct com_s *com; 250651078Speter int s; 250751078Speter int unit; 250851078Speter 250951078Speter unit = DEV_TO_UNIT(tp->t_dev); 251051078Speter com = com_addr(unit); 251157915Simp if (com == NULL) 251257915Simp return; 251351078Speter s = spltty(); 251451078Speter disable_intr(); 251551078Speter if (tp->t_state & TS_TTSTOP) 251651078Speter com->state &= ~CS_TTGO; 251751078Speter else 251851078Speter com->state |= CS_TTGO; 251951078Speter if (tp->t_state & TS_TBLOCK) { 252051078Speter if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW) 252151078Speter outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); 252251078Speter } else { 252351078Speter if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater 252451078Speter && com->state & CS_RTS_IFLOW) 252551078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 252651078Speter } 252751078Speter enable_intr(); 252851078Speter if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { 252951078Speter ttwwakeup(tp); 253051078Speter splx(s); 253151078Speter return; 253251078Speter } 253351078Speter if (tp->t_outq.c_cc != 0) { 253451078Speter struct lbq *qp; 253551078Speter struct lbq *next; 253651078Speter 253751078Speter if (!com->obufs[0].l_queued) { 253851078Speter com->obufs[0].l_tail 253951078Speter = com->obuf1 + q_to_b(&tp->t_outq, com->obuf1, 254051078Speter sizeof com->obuf1); 254151078Speter com->obufs[0].l_next = NULL; 254251078Speter com->obufs[0].l_queued = TRUE; 254351078Speter disable_intr(); 254451078Speter if (com->state & CS_BUSY) { 254551078Speter qp = com->obufq.l_next; 254651078Speter while ((next = qp->l_next) != NULL) 254751078Speter qp = next; 254851078Speter qp->l_next = &com->obufs[0]; 254951078Speter } else { 255051078Speter com->obufq.l_head = com->obufs[0].l_head; 255151078Speter com->obufq.l_tail = com->obufs[0].l_tail; 255251078Speter com->obufq.l_next = &com->obufs[0]; 255351078Speter com->state |= CS_BUSY; 255451078Speter } 255551078Speter enable_intr(); 255651078Speter } 255751078Speter if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) { 255851078Speter com->obufs[1].l_tail 255951078Speter = com->obuf2 + q_to_b(&tp->t_outq, com->obuf2, 256051078Speter sizeof com->obuf2); 256151078Speter com->obufs[1].l_next = NULL; 256251078Speter com->obufs[1].l_queued = TRUE; 256351078Speter disable_intr(); 256451078Speter if (com->state & CS_BUSY) { 256551078Speter qp = com->obufq.l_next; 256651078Speter while ((next = qp->l_next) != NULL) 256751078Speter qp = next; 256851078Speter qp->l_next = &com->obufs[1]; 256951078Speter } else { 257051078Speter com->obufq.l_head = com->obufs[1].l_head; 257151078Speter com->obufq.l_tail = com->obufs[1].l_tail; 257251078Speter com->obufq.l_next = &com->obufs[1]; 257351078Speter com->state |= CS_BUSY; 257451078Speter } 257551078Speter enable_intr(); 257651078Speter } 257751078Speter tp->t_state |= TS_BUSY; 257851078Speter } 257951078Speter disable_intr(); 258051078Speter if (com->state >= (CS_BUSY | CS_TTGO)) 258151078Speter siointr1(com); /* fake interrupt to start output */ 258251078Speter enable_intr(); 258351078Speter ttwwakeup(tp); 258451078Speter splx(s); 258551078Speter} 258651078Speter 258751078Speterstatic void 258851654Sphkcomstop(tp, rw) 258951078Speter struct tty *tp; 259051078Speter int rw; 259151078Speter{ 259251078Speter struct com_s *com; 259351078Speter 259451078Speter com = com_addr(DEV_TO_UNIT(tp->t_dev)); 259557915Simp if (com == NULL || com->gone) 259651078Speter return; 259751078Speter disable_intr(); 259851078Speter if (rw & FWRITE) { 259951078Speter if (com->hasfifo) 260051078Speter#ifdef COM_ESP 260151078Speter /* XXX avoid h/w bug. */ 260251078Speter if (!com->esp) 260351078Speter#endif 260460471Snyan sio_setreg(com, com_fifo, 260560471Snyan FIFO_XMT_RST | com->fifo_image); 260651078Speter com->obufs[0].l_queued = FALSE; 260751078Speter com->obufs[1].l_queued = FALSE; 260851078Speter if (com->state & CS_ODONE) 260951078Speter com_events -= LOTS_OF_EVENTS; 261051078Speter com->state &= ~(CS_ODONE | CS_BUSY); 261151078Speter com->tp->t_state &= ~TS_BUSY; 261251078Speter } 261351078Speter if (rw & FREAD) { 261451078Speter if (com->hasfifo) 261551078Speter#ifdef COM_ESP 261651078Speter /* XXX avoid h/w bug. */ 261751078Speter if (!com->esp) 261851078Speter#endif 261960471Snyan sio_setreg(com, com_fifo, 262060471Snyan FIFO_RCV_RST | com->fifo_image); 262151078Speter com_events -= (com->iptr - com->ibuf); 262251078Speter com->iptr = com->ibuf; 262351078Speter } 262451078Speter enable_intr(); 262551078Speter comstart(tp); 262651078Speter} 262751078Speter 262851078Speterstatic int 262951078Spetercommctl(com, bits, how) 263051078Speter struct com_s *com; 263151078Speter int bits; 263251078Speter int how; 263351078Speter{ 263451078Speter int mcr; 263551078Speter int msr; 263651078Speter 263751078Speter if (how == DMGET) { 263851078Speter bits = TIOCM_LE; /* XXX - always enabled while open */ 263951078Speter mcr = com->mcr_image; 264051078Speter if (mcr & MCR_DTR) 264151078Speter bits |= TIOCM_DTR; 264251078Speter if (mcr & MCR_RTS) 264351078Speter bits |= TIOCM_RTS; 264451078Speter msr = com->prev_modem_status; 264551078Speter if (msr & MSR_CTS) 264651078Speter bits |= TIOCM_CTS; 264751078Speter if (msr & MSR_DCD) 264851078Speter bits |= TIOCM_CD; 264951078Speter if (msr & MSR_DSR) 265051078Speter bits |= TIOCM_DSR; 265151078Speter /* 265251078Speter * XXX - MSR_RI is naturally volatile, and we make MSR_TERI 265351078Speter * more volatile by reading the modem status a lot. Perhaps 265451078Speter * we should latch both bits until the status is read here. 265551078Speter */ 265651078Speter if (msr & (MSR_RI | MSR_TERI)) 265751078Speter bits |= TIOCM_RI; 265851078Speter return (bits); 265951078Speter } 266051078Speter mcr = 0; 266151078Speter if (bits & TIOCM_DTR) 266251078Speter mcr |= MCR_DTR; 266351078Speter if (bits & TIOCM_RTS) 266451078Speter mcr |= MCR_RTS; 266551078Speter if (com->gone) 266651078Speter return(0); 266751078Speter disable_intr(); 266851078Speter switch (how) { 266951078Speter case DMSET: 267051078Speter outb(com->modem_ctl_port, 267151078Speter com->mcr_image = mcr | (com->mcr_image & MCR_IENABLE)); 267251078Speter break; 267351078Speter case DMBIS: 267451078Speter outb(com->modem_ctl_port, com->mcr_image |= mcr); 267551078Speter break; 267651078Speter case DMBIC: 267751078Speter outb(com->modem_ctl_port, com->mcr_image &= ~mcr); 267851078Speter break; 267951078Speter } 268051078Speter enable_intr(); 268151078Speter return (0); 268251078Speter} 268351078Speter 268451078Speterstatic void 268551078Spetersiosettimeout() 268651078Speter{ 268751078Speter struct com_s *com; 268851078Speter bool_t someopen; 268951078Speter int unit; 269051078Speter 269151078Speter /* 269251078Speter * Set our timeout period to 1 second if no polled devices are open. 269351078Speter * Otherwise set it to max(1/200, 1/hz). 269451078Speter * Enable timeouts iff some device is open. 269551078Speter */ 269651078Speter untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 269751078Speter sio_timeout = hz; 269851078Speter someopen = FALSE; 269953344Speter for (unit = 0; unit < sio_numunits; ++unit) { 270051078Speter com = com_addr(unit); 270151078Speter if (com != NULL && com->tp != NULL 270251078Speter && com->tp->t_state & TS_ISOPEN && !com->gone) { 270351078Speter someopen = TRUE; 270451078Speter if (com->poll || com->poll_output) { 270551078Speter sio_timeout = hz > 200 ? hz / 200 : 1; 270651078Speter break; 270751078Speter } 270851078Speter } 270951078Speter } 271051078Speter if (someopen) { 271151078Speter sio_timeouts_until_log = hz / sio_timeout; 271251078Speter sio_timeout_handle = timeout(comwakeup, (void *)NULL, 271351078Speter sio_timeout); 271451078Speter } else { 271551078Speter /* Flush error messages, if any. */ 271651078Speter sio_timeouts_until_log = 1; 271751078Speter comwakeup((void *)NULL); 271851078Speter untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 271951078Speter } 272051078Speter} 272151078Speter 272251078Speterstatic void 272351078Spetercomwakeup(chan) 272451078Speter void *chan; 272551078Speter{ 272651078Speter struct com_s *com; 272751078Speter int unit; 272851078Speter 272951078Speter sio_timeout_handle = timeout(comwakeup, (void *)NULL, sio_timeout); 273051078Speter 273151078Speter /* 273251078Speter * Recover from lost output interrupts. 273351078Speter * Poll any lines that don't use interrupts. 273451078Speter */ 273553344Speter for (unit = 0; unit < sio_numunits; ++unit) { 273651078Speter com = com_addr(unit); 273751078Speter if (com != NULL && !com->gone 273851078Speter && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) { 273951078Speter disable_intr(); 274051078Speter siointr1(com); 274151078Speter enable_intr(); 274251078Speter } 274351078Speter } 274451078Speter 274551078Speter /* 274651078Speter * Check for and log errors, but not too often. 274751078Speter */ 274851078Speter if (--sio_timeouts_until_log > 0) 274951078Speter return; 275051078Speter sio_timeouts_until_log = hz / sio_timeout; 275153344Speter for (unit = 0; unit < sio_numunits; ++unit) { 275251078Speter int errnum; 275351078Speter 275451078Speter com = com_addr(unit); 275551078Speter if (com == NULL) 275651078Speter continue; 275751078Speter if (com->gone) 275851078Speter continue; 275951078Speter for (errnum = 0; errnum < CE_NTYPES; ++errnum) { 276051078Speter u_int delta; 276151078Speter u_long total; 276251078Speter 276351078Speter disable_intr(); 276451078Speter delta = com->delta_error_counts[errnum]; 276551078Speter com->delta_error_counts[errnum] = 0; 276651078Speter enable_intr(); 276751078Speter if (delta == 0) 276851078Speter continue; 276951078Speter total = com->error_counts[errnum] += delta; 277051078Speter log(LOG_ERR, "sio%d: %u more %s%s (total %lu)\n", 277151078Speter unit, delta, error_desc[errnum], 277251078Speter delta == 1 ? "" : "s", total); 277351078Speter } 277451078Speter } 277551078Speter} 277651078Speter 277751078Speterstatic void 277851078Speterdisc_optim(tp, t, com) 277951078Speter struct tty *tp; 278051078Speter struct termios *t; 278151078Speter struct com_s *com; 278251078Speter{ 278351078Speter if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON)) 278451078Speter && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK)) 278551078Speter && (!(t->c_iflag & PARMRK) 278651078Speter || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK)) 278751078Speter && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN)) 278851078Speter && linesw[tp->t_line].l_rint == ttyinput) 278951078Speter tp->t_state |= TS_CAN_BYPASS_L_RINT; 279051078Speter else 279151078Speter tp->t_state &= ~TS_CAN_BYPASS_L_RINT; 279251078Speter com->hotchar = linesw[tp->t_line].l_hotchar; 279351078Speter} 279451078Speter 279551078Speter/* 279651078Speter * Following are all routines needed for SIO to act as console 279751078Speter */ 279851078Speter#include <sys/cons.h> 279951078Speter 280051078Speterstruct siocnstate { 280151078Speter u_char dlbl; 280251078Speter u_char dlbh; 280351078Speter u_char ier; 280451078Speter u_char cfcr; 280551078Speter u_char mcr; 280651078Speter}; 280751078Speter 280851078Speterstatic speed_t siocngetspeed __P((Port_t, struct speedtab *)); 280951078Speterstatic void siocnclose __P((struct siocnstate *sp, Port_t iobase)); 281051078Speterstatic void siocnopen __P((struct siocnstate *sp, Port_t iobase, int speed)); 281151078Speterstatic void siocntxwait __P((Port_t iobase)); 281251078Speter 281351078Speterstatic cn_probe_t siocnprobe; 281451078Speterstatic cn_init_t siocninit; 281551078Speterstatic cn_checkc_t siocncheckc; 281651078Speterstatic cn_getc_t siocngetc; 281751078Speterstatic cn_putc_t siocnputc; 281851078Speter 281951078Speter#ifdef __i386__ 282055823SyokotaCONS_DRIVER(sio, siocnprobe, siocninit, NULL, siocngetc, siocncheckc, 282155823Syokota siocnputc, NULL); 282251078Speter#endif 282351078Speter 282451078Speter/* To get the GDB related variables */ 282551078Speter#if DDB > 0 282651078Speter#include <ddb/ddb.h> 282751078Speter#endif 282851078Speter 282951078Speterstatic void 283051078Spetersiocntxwait(iobase) 283151078Speter Port_t iobase; 283251078Speter{ 283351078Speter int timo; 283451078Speter 283551078Speter /* 283651078Speter * Wait for any pending transmission to finish. Required to avoid 283751078Speter * the UART lockup bug when the speed is changed, and for normal 283851078Speter * transmits. 283951078Speter */ 284051078Speter timo = 100000; 284151078Speter while ((inb(iobase + com_lsr) & (LSR_TSRE | LSR_TXRDY)) 284251078Speter != (LSR_TSRE | LSR_TXRDY) && --timo != 0) 284351078Speter ; 284451078Speter} 284551078Speter 284651078Speter/* 284751078Speter * Read the serial port specified and try to figure out what speed 284851078Speter * it's currently running at. We're assuming the serial port has 284951078Speter * been initialized and is basicly idle. This routine is only intended 285051078Speter * to be run at system startup. 285151078Speter * 285251078Speter * If the value read from the serial port doesn't make sense, return 0. 285351078Speter */ 285451078Speter 285551078Speterstatic speed_t 285651078Spetersiocngetspeed(iobase, table) 285751078Speter Port_t iobase; 285851078Speter struct speedtab *table; 285951078Speter{ 286051078Speter int code; 286151078Speter u_char dlbh; 286251078Speter u_char dlbl; 286351078Speter u_char cfcr; 286451078Speter 286551078Speter cfcr = inb(iobase + com_cfcr); 286651078Speter outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 286751078Speter 286851078Speter dlbl = inb(iobase + com_dlbl); 286951078Speter dlbh = inb(iobase + com_dlbh); 287051078Speter 287151078Speter outb(iobase + com_cfcr, cfcr); 287251078Speter 287351078Speter code = dlbh << 8 | dlbl; 287451078Speter 287553344Speter for (; table->sp_speed != -1; table++) 287651078Speter if (table->sp_code == code) 287751078Speter return (table->sp_speed); 287851078Speter 287958885Simp return (0); /* didn't match anything sane */ 288051078Speter} 288151078Speter 288251078Speterstatic void 288351078Spetersiocnopen(sp, iobase, speed) 288451078Speter struct siocnstate *sp; 288551078Speter Port_t iobase; 288651078Speter int speed; 288751078Speter{ 288851078Speter int divisor; 288951078Speter u_char dlbh; 289051078Speter u_char dlbl; 289151078Speter 289251078Speter /* 289351078Speter * Save all the device control registers except the fifo register 289451078Speter * and set our default ones (cs8 -parenb speed=comdefaultrate). 289551078Speter * We can't save the fifo register since it is read-only. 289651078Speter */ 289751078Speter sp->ier = inb(iobase + com_ier); 289851078Speter outb(iobase + com_ier, 0); /* spltty() doesn't stop siointr() */ 289951078Speter siocntxwait(iobase); 290051078Speter sp->cfcr = inb(iobase + com_cfcr); 290151078Speter outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 290251078Speter sp->dlbl = inb(iobase + com_dlbl); 290351078Speter sp->dlbh = inb(iobase + com_dlbh); 290451078Speter /* 290551078Speter * Only set the divisor registers if they would change, since on 290651078Speter * some 16550 incompatibles (Startech), setting them clears the 290751078Speter * data input register. This also reduces the effects of the 290851078Speter * UMC8669F bug. 290951078Speter */ 291051078Speter divisor = ttspeedtab(speed, comspeedtab); 291151078Speter dlbl = divisor & 0xFF; 291251078Speter if (sp->dlbl != dlbl) 291351078Speter outb(iobase + com_dlbl, dlbl); 291451078Speter dlbh = (u_int) divisor >> 8; 291551078Speter if (sp->dlbh != dlbh) 291651078Speter outb(iobase + com_dlbh, dlbh); 291751078Speter outb(iobase + com_cfcr, CFCR_8BITS); 291851078Speter sp->mcr = inb(iobase + com_mcr); 291951078Speter /* 292051078Speter * We don't want interrupts, but must be careful not to "disable" 292151078Speter * them by clearing the MCR_IENABLE bit, since that might cause 292251078Speter * an interrupt by floating the IRQ line. 292351078Speter */ 292451078Speter outb(iobase + com_mcr, (sp->mcr & MCR_IENABLE) | MCR_DTR | MCR_RTS); 292551078Speter} 292651078Speter 292751078Speterstatic void 292851078Spetersiocnclose(sp, iobase) 292951078Speter struct siocnstate *sp; 293051078Speter Port_t iobase; 293151078Speter{ 293251078Speter /* 293351078Speter * Restore the device control registers. 293451078Speter */ 293551078Speter siocntxwait(iobase); 293651078Speter outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 293751078Speter if (sp->dlbl != inb(iobase + com_dlbl)) 293851078Speter outb(iobase + com_dlbl, sp->dlbl); 293951078Speter if (sp->dlbh != inb(iobase + com_dlbh)) 294051078Speter outb(iobase + com_dlbh, sp->dlbh); 294151078Speter outb(iobase + com_cfcr, sp->cfcr); 294251078Speter /* 294351078Speter * XXX damp oscillations of MCR_DTR and MCR_RTS by not restoring them. 294451078Speter */ 294551078Speter outb(iobase + com_mcr, sp->mcr | MCR_DTR | MCR_RTS); 294651078Speter outb(iobase + com_ier, sp->ier); 294751078Speter} 294851078Speter 294951078Speterstatic void 295051078Spetersiocnprobe(cp) 295151078Speter struct consdev *cp; 295251078Speter{ 295351078Speter speed_t boot_speed; 295451078Speter u_char cfcr; 295551078Speter int s, unit; 295651078Speter struct siocnstate sp; 295751078Speter 295851078Speter /* 295951078Speter * Find our first enabled console, if any. If it is a high-level 296051078Speter * console device, then initialize it and return successfully. 296151078Speter * If it is a low-level console device, then initialize it and 296251078Speter * return unsuccessfully. It must be initialized in both cases 296351078Speter * for early use by console drivers and debuggers. Initializing 296451078Speter * the hardware is not necessary in all cases, since the i/o 296551078Speter * routines initialize it on the fly, but it is necessary if 296651078Speter * input might arrive while the hardware is switched back to an 296751078Speter * uninitialized state. We can't handle multiple console devices 296851078Speter * yet because our low-level routines don't take a device arg. 296951078Speter * We trust the user to set the console flags properly so that we 297051078Speter * don't need to probe. 297151078Speter */ 297251078Speter cp->cn_pri = CN_DEAD; 297351078Speter 297451078Speter for (unit = 0; unit < 16; unit++) { /* XXX need to know how many */ 297551078Speter int flags; 297651078Speter int disabled; 297751078Speter if (resource_int_value("sio", unit, "disabled", &disabled) == 0) { 297851078Speter if (disabled) 297951078Speter continue; 298051078Speter } 298151078Speter if (resource_int_value("sio", unit, "flags", &flags)) 298251078Speter continue; 298351078Speter if (COM_CONSOLE(flags) || COM_DEBUGGER(flags)) { 298451078Speter int port; 298551078Speter Port_t iobase; 298651078Speter 298751078Speter if (resource_int_value("sio", unit, "port", &port)) 298851078Speter continue; 298951078Speter iobase = port; 299051078Speter s = spltty(); 299151078Speter if (boothowto & RB_SERIAL) { 299251078Speter boot_speed = siocngetspeed(iobase, comspeedtab); 299351078Speter if (boot_speed) 299451078Speter comdefaultrate = boot_speed; 299551078Speter } 299651078Speter 299751078Speter /* 299851078Speter * Initialize the divisor latch. We can't rely on 299951078Speter * siocnopen() to do this the first time, since it 300051078Speter * avoids writing to the latch if the latch appears 300151078Speter * to have the correct value. Also, if we didn't 300251078Speter * just read the speed from the hardware, then we 300351078Speter * need to set the speed in hardware so that 300451078Speter * switching it later is null. 300551078Speter */ 300651078Speter cfcr = inb(iobase + com_cfcr); 300751078Speter outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 300851078Speter outb(iobase + com_dlbl, 300951078Speter COMBRD(comdefaultrate) & 0xff); 301051078Speter outb(iobase + com_dlbh, 301151078Speter (u_int) COMBRD(comdefaultrate) >> 8); 301251078Speter outb(iobase + com_cfcr, cfcr); 301351078Speter 301451078Speter siocnopen(&sp, iobase, comdefaultrate); 301551078Speter 301651078Speter splx(s); 301751078Speter if (COM_CONSOLE(flags) && !COM_LLCONSOLE(flags)) { 301851078Speter cp->cn_dev = makedev(CDEV_MAJOR, unit); 301951078Speter cp->cn_pri = COM_FORCECONSOLE(flags) 302051078Speter || boothowto & RB_SERIAL 302151078Speter ? CN_REMOTE : CN_NORMAL; 302251078Speter siocniobase = iobase; 302351078Speter siocnunit = unit; 302451078Speter } 302551078Speter if (COM_DEBUGGER(flags)) { 302651078Speter printf("sio%d: gdb debugging port\n", unit); 302751078Speter siogdbiobase = iobase; 302851078Speter siogdbunit = unit; 302951078Speter#if DDB > 0 303051078Speter gdbdev = makedev(CDEV_MAJOR, unit); 303151078Speter gdb_getc = siocngetc; 303251078Speter gdb_putc = siocnputc; 303351078Speter#endif 303451078Speter } 303551078Speter } 303651078Speter } 303751078Speter#ifdef __i386__ 303851078Speter#if DDB > 0 303951078Speter /* 304051078Speter * XXX Ugly Compatability. 304151078Speter * If no gdb port has been specified, set it to be the console 304251078Speter * as some configuration files don't specify the gdb port. 304351078Speter */ 304451078Speter if (gdbdev == NODEV && (boothowto & RB_GDB)) { 304551078Speter printf("Warning: no GDB port specified. Defaulting to sio%d.\n", 304651078Speter siocnunit); 304751078Speter printf("Set flag 0x80 on desired GDB port in your\n"); 304851078Speter printf("configuration file (currently sio only).\n"); 304951078Speter siogdbiobase = siocniobase; 305051078Speter siogdbunit = siocnunit; 305151078Speter gdbdev = makedev(CDEV_MAJOR, siocnunit); 305251078Speter gdb_getc = siocngetc; 305351078Speter gdb_putc = siocnputc; 305451078Speter } 305551078Speter#endif 305651078Speter#endif 305751078Speter} 305851078Speter 305951078Speter#ifdef __alpha__ 306051078Speter 306155868SgallatinCONS_DRIVER(sio, NULL, NULL, NULL, siocngetc, siocncheckc, siocnputc, NULL); 306251078Speter 306351078Speterint 306451078Spetersiocnattach(port, speed) 306551078Speter int port; 306651078Speter int speed; 306751078Speter{ 306851078Speter int s; 306951078Speter u_char cfcr; 307051078Speter struct siocnstate sp; 307151078Speter 307251078Speter siocniobase = port; 307351078Speter comdefaultrate = speed; 307451078Speter sio_consdev.cn_pri = CN_NORMAL; 307551078Speter sio_consdev.cn_dev = makedev(CDEV_MAJOR, 0); 307651078Speter 307751078Speter s = spltty(); 307851078Speter 307951078Speter /* 308051078Speter * Initialize the divisor latch. We can't rely on 308151078Speter * siocnopen() to do this the first time, since it 308251078Speter * avoids writing to the latch if the latch appears 308351078Speter * to have the correct value. Also, if we didn't 308451078Speter * just read the speed from the hardware, then we 308551078Speter * need to set the speed in hardware so that 308651078Speter * switching it later is null. 308751078Speter */ 308851078Speter cfcr = inb(siocniobase + com_cfcr); 308951078Speter outb(siocniobase + com_cfcr, CFCR_DLAB | cfcr); 309051078Speter outb(siocniobase + com_dlbl, 309151078Speter COMBRD(comdefaultrate) & 0xff); 309251078Speter outb(siocniobase + com_dlbh, 309351078Speter (u_int) COMBRD(comdefaultrate) >> 8); 309451078Speter outb(siocniobase + com_cfcr, cfcr); 309551078Speter 309651078Speter siocnopen(&sp, siocniobase, comdefaultrate); 309751078Speter splx(s); 309851078Speter 309951078Speter cn_tab = &sio_consdev; 310058885Simp return (0); 310151078Speter} 310251078Speter 310351078Speterint 310451078Spetersiogdbattach(port, speed) 310551078Speter int port; 310651078Speter int speed; 310751078Speter{ 310851078Speter int s; 310951078Speter u_char cfcr; 311051078Speter struct siocnstate sp; 311151078Speter 311251078Speter siogdbiobase = port; 311351078Speter gdbdefaultrate = speed; 311451078Speter 311551078Speter s = spltty(); 311651078Speter 311751078Speter /* 311851078Speter * Initialize the divisor latch. We can't rely on 311951078Speter * siocnopen() to do this the first time, since it 312051078Speter * avoids writing to the latch if the latch appears 312151078Speter * to have the correct value. Also, if we didn't 312251078Speter * just read the speed from the hardware, then we 312351078Speter * need to set the speed in hardware so that 312451078Speter * switching it later is null. 312551078Speter */ 312651078Speter cfcr = inb(siogdbiobase + com_cfcr); 312751078Speter outb(siogdbiobase + com_cfcr, CFCR_DLAB | cfcr); 312851078Speter outb(siogdbiobase + com_dlbl, 312951078Speter COMBRD(gdbdefaultrate) & 0xff); 313051078Speter outb(siogdbiobase + com_dlbh, 313151078Speter (u_int) COMBRD(gdbdefaultrate) >> 8); 313251078Speter outb(siogdbiobase + com_cfcr, cfcr); 313351078Speter 313451078Speter siocnopen(&sp, siogdbiobase, gdbdefaultrate); 313551078Speter splx(s); 313651078Speter 313758885Simp return (0); 313851078Speter} 313951078Speter 314051078Speter#endif 314151078Speter 314251078Speterstatic void 314351078Spetersiocninit(cp) 314451078Speter struct consdev *cp; 314551078Speter{ 314651078Speter comconsole = DEV_TO_UNIT(cp->cn_dev); 314751078Speter} 314851078Speter 314951078Speterstatic int 315051078Spetersiocncheckc(dev) 315151078Speter dev_t dev; 315251078Speter{ 315351078Speter int c; 315451078Speter Port_t iobase; 315551078Speter int s; 315651078Speter struct siocnstate sp; 315751078Speter 315851078Speter if (minor(dev) == siogdbunit) 315951078Speter iobase = siogdbiobase; 316051078Speter else 316151078Speter iobase = siocniobase; 316251078Speter s = spltty(); 316351078Speter siocnopen(&sp, iobase, comdefaultrate); 316451078Speter if (inb(iobase + com_lsr) & LSR_RXRDY) 316551078Speter c = inb(iobase + com_data); 316651078Speter else 316751078Speter c = -1; 316851078Speter siocnclose(&sp, iobase); 316951078Speter splx(s); 317051078Speter return (c); 317151078Speter} 317251078Speter 317351078Speter 317451078Speterint 317551078Spetersiocngetc(dev) 317651078Speter dev_t dev; 317751078Speter{ 317851078Speter int c; 317951078Speter Port_t iobase; 318051078Speter int s; 318151078Speter struct siocnstate sp; 318251078Speter 318351078Speter if (minor(dev) == siogdbunit) 318451078Speter iobase = siogdbiobase; 318551078Speter else 318651078Speter iobase = siocniobase; 318751078Speter s = spltty(); 318851078Speter siocnopen(&sp, iobase, comdefaultrate); 318951078Speter while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 319051078Speter ; 319151078Speter c = inb(iobase + com_data); 319251078Speter siocnclose(&sp, iobase); 319351078Speter splx(s); 319451078Speter return (c); 319551078Speter} 319651078Speter 319751078Spetervoid 319851078Spetersiocnputc(dev, c) 319951078Speter dev_t dev; 320051078Speter int c; 320151078Speter{ 320251078Speter int s; 320351078Speter struct siocnstate sp; 320451078Speter Port_t iobase; 320551078Speter 320651078Speter if (minor(dev) == siogdbunit) 320751078Speter iobase = siogdbiobase; 320851078Speter else 320951078Speter iobase = siocniobase; 321051078Speter s = spltty(); 321151078Speter siocnopen(&sp, iobase, comdefaultrate); 321251078Speter siocntxwait(iobase); 321351078Speter outb(iobase + com_data, c); 321451078Speter siocnclose(&sp, iobase); 321551078Speter splx(s); 321651078Speter} 321751078Speter 321851078Speter#ifdef __alpha__ 321951078Speterint 322051078Spetersiogdbgetc() 322151078Speter{ 322251078Speter int c; 322351078Speter Port_t iobase; 322451078Speter int s; 322551078Speter struct siocnstate sp; 322651078Speter 322751078Speter iobase = siogdbiobase; 322851078Speter s = spltty(); 322951078Speter siocnopen(&sp, iobase, gdbdefaultrate); 323051078Speter while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 323151078Speter ; 323251078Speter c = inb(iobase + com_data); 323351078Speter siocnclose(&sp, iobase); 323451078Speter splx(s); 323551078Speter return (c); 323651078Speter} 323751078Speter 323851078Spetervoid 323951078Spetersiogdbputc(c) 324051078Speter int c; 324151078Speter{ 324251078Speter int s; 324351078Speter struct siocnstate sp; 324451078Speter 324551078Speter s = spltty(); 324651078Speter siocnopen(&sp, siogdbiobase, gdbdefaultrate); 324751078Speter siocntxwait(siogdbiobase); 324851078Speter outb(siogdbiobase + com_data, c); 324951078Speter siocnclose(&sp, siogdbiobase); 325051078Speter splx(s); 325151078Speter} 325251078Speter#endif 325351078Speter 325452471SimpDRIVER_MODULE(sio, isa, sio_isa_driver, sio_devclass, 0, 0); 325552471Simp#if NCARD > 0 325652471SimpDRIVER_MODULE(sio, pccard, sio_pccard_driver, sio_devclass, 0, 0); 325752471Simp#endif 325858885Simp#if NPCI > 0 325958885SimpDRIVER_MODULE(sio, pci, sio_pci_driver, sio_devclass, 0, 0); 326058885Simp#endif 3261