sio.c revision 65469
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 65469 2000-09-05 09:42:47Z sheldonh $ 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; 28265131Sphk dev_t devs[6]; 28351078Speter 28451078Speter /* 28551078Speter * Data area for output buffers. Someday we should build the output 28651078Speter * buffer queue without copying data. 28751078Speter */ 28851078Speter u_char obuf1[256]; 28951078Speter u_char obuf2[256]; 29051078Speter}; 29151078Speter 29251078Speter#ifdef COM_ESP 29351078Speterstatic int espattach __P((struct com_s *com, Port_t esp_port)); 29451078Speter#endif 29558885Simpstatic int sioattach __P((device_t dev, int rid)); 29652471Simpstatic int sio_isa_attach __P((device_t dev)); 29751078Speter 29851078Speterstatic timeout_t siobusycheck; 29951078Speterstatic timeout_t siodtrwakeup; 30051078Speterstatic void comhardclose __P((struct com_s *com)); 30151078Speterstatic void sioinput __P((struct com_s *com)); 30251078Speterstatic void siointr1 __P((struct com_s *com)); 30351078Speterstatic void siointr __P((void *arg)); 30451078Speterstatic int commctl __P((struct com_s *com, int bits, int how)); 30551078Speterstatic int comparam __P((struct tty *tp, struct termios *t)); 30651078Speterstatic swihand_t siopoll; 30758885Simpstatic int sioprobe __P((device_t dev, int xrid)); 30852471Simpstatic int sio_isa_probe __P((device_t dev)); 30951078Speterstatic void siosettimeout __P((void)); 31051078Speterstatic int siosetwater __P((struct com_s *com, speed_t speed)); 31151078Speterstatic void comstart __P((struct tty *tp)); 31251654Sphkstatic void comstop __P((struct tty *tp, int rw)); 31351078Speterstatic timeout_t comwakeup; 31451078Speterstatic void disc_optim __P((struct tty *tp, struct termios *t, 31551078Speter struct com_s *com)); 31651078Speter 31752471Simp#if NCARD > 0 31852471Simpstatic int sio_pccard_attach __P((device_t dev)); 31954386Simpstatic int sio_pccard_detach __P((device_t dev)); 32052471Simpstatic int sio_pccard_probe __P((device_t dev)); 32152471Simp#endif /* NCARD > 0 */ 32251078Speter 32358885Simp#if NPCI > 0 32458885Simpstatic int sio_pci_attach __P((device_t dev)); 32558885Simpstatic void sio_pci_kludge_unit __P((device_t dev)); 32658885Simpstatic int sio_pci_probe __P((device_t dev)); 32758885Simp#endif /* NPCI > 0 */ 32858885Simp 32951078Speterstatic char driver_name[] = "sio"; 33051078Speter 33151078Speter/* table and macro for fast conversion from a unit number to its com struct */ 33251078Speterstatic devclass_t sio_devclass; 33351078Speter#define com_addr(unit) ((struct com_s *) \ 33451078Speter devclass_get_softc(sio_devclass, unit)) 33551078Speter 33652471Simpstatic device_method_t sio_isa_methods[] = { 33751078Speter /* Device interface */ 33852471Simp DEVMETHOD(device_probe, sio_isa_probe), 33952471Simp DEVMETHOD(device_attach, sio_isa_attach), 34051078Speter 34151078Speter { 0, 0 } 34251078Speter}; 34351078Speter 34452471Simpstatic driver_t sio_isa_driver = { 34551078Speter driver_name, 34652471Simp sio_isa_methods, 34751078Speter sizeof(struct com_s), 34851078Speter}; 34951078Speter 35052471Simp#if NCARD > 0 35152471Simpstatic device_method_t sio_pccard_methods[] = { 35252471Simp /* Device interface */ 35352471Simp DEVMETHOD(device_probe, sio_pccard_probe), 35452471Simp DEVMETHOD(device_attach, sio_pccard_attach), 35552471Simp DEVMETHOD(device_detach, sio_pccard_detach), 35652471Simp 35752471Simp { 0, 0 } 35852471Simp}; 35952471Simp 36052471Simpstatic driver_t sio_pccard_driver = { 36152471Simp driver_name, 36252471Simp sio_pccard_methods, 36352471Simp sizeof(struct com_s), 36452471Simp}; 36558885Simp#endif /* NCARD > 0 */ 36652471Simp 36758885Simp#if NPCI > 0 36858885Simpstatic device_method_t sio_pci_methods[] = { 36958885Simp /* Device interface */ 37058885Simp DEVMETHOD(device_probe, sio_pci_probe), 37158885Simp DEVMETHOD(device_attach, sio_pci_attach), 37258885Simp 37358885Simp { 0, 0 } 37458885Simp}; 37558885Simp 37658885Simpstatic driver_t sio_pci_driver = { 37758885Simp driver_name, 37858885Simp sio_pci_methods, 37958885Simp sizeof(struct com_s), 38058885Simp}; 38158885Simp#endif /* NPCI > 0 */ 38258885Simp 38351078Speterstatic d_open_t sioopen; 38451078Speterstatic d_close_t sioclose; 38551078Speterstatic d_read_t sioread; 38651078Speterstatic d_write_t siowrite; 38751078Speterstatic d_ioctl_t sioioctl; 38851078Speter 38951078Speter#define CDEV_MAJOR 28 39051078Speterstatic struct cdevsw sio_cdevsw = { 39151078Speter /* open */ sioopen, 39251078Speter /* close */ sioclose, 39351078Speter /* read */ sioread, 39451078Speter /* write */ siowrite, 39551078Speter /* ioctl */ sioioctl, 39651654Sphk /* poll */ ttypoll, 39751078Speter /* mmap */ nommap, 39851078Speter /* strategy */ nostrategy, 39951078Speter /* name */ driver_name, 40051078Speter /* maj */ CDEV_MAJOR, 40151078Speter /* dump */ nodump, 40251078Speter /* psize */ nopsize, 40351078Speter /* flags */ D_TTY, 40451078Speter /* bmaj */ -1 40551078Speter}; 40651078Speter 40751078Speterint comconsole = -1; 40851078Speterstatic volatile speed_t comdefaultrate = CONSPEED; 40951078Speter#ifdef __alpha__ 41051078Speterstatic volatile speed_t gdbdefaultrate = CONSPEED; 41151078Speter#endif 41251078Speterstatic u_int com_events; /* input chars + weighted output completions */ 41351078Speterstatic Port_t siocniobase; 41451078Speterstatic int siocnunit; 41551078Speterstatic Port_t siogdbiobase; 41651078Speterstatic int siogdbunit = -1; 41751078Speterstatic bool_t sio_registered; 41851078Speterstatic int sio_timeout; 41951078Speterstatic int sio_timeouts_until_log; 42051078Speterstatic struct callout_handle sio_timeout_handle 42151078Speter = CALLOUT_HANDLE_INITIALIZER(&sio_timeout_handle); 42253344Speterstatic int sio_numunits; 42351078Speter 42451078Speterstatic struct speedtab comspeedtab[] = { 42551078Speter { 0, 0 }, 42651078Speter { 50, COMBRD(50) }, 42751078Speter { 75, COMBRD(75) }, 42851078Speter { 110, COMBRD(110) }, 42951078Speter { 134, COMBRD(134) }, 43051078Speter { 150, COMBRD(150) }, 43151078Speter { 200, COMBRD(200) }, 43251078Speter { 300, COMBRD(300) }, 43351078Speter { 600, COMBRD(600) }, 43451078Speter { 1200, COMBRD(1200) }, 43551078Speter { 1800, COMBRD(1800) }, 43651078Speter { 2400, COMBRD(2400) }, 43751078Speter { 4800, COMBRD(4800) }, 43851078Speter { 9600, COMBRD(9600) }, 43951078Speter { 19200, COMBRD(19200) }, 44051078Speter { 38400, COMBRD(38400) }, 44151078Speter { 57600, COMBRD(57600) }, 44251078Speter { 115200, COMBRD(115200) }, 44351078Speter { -1, -1 } 44451078Speter}; 44551078Speter 44651078Speter#ifdef COM_ESP 44751078Speter/* XXX configure this properly. */ 44851078Speterstatic Port_t likely_com_ports[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, }; 44951078Speterstatic Port_t likely_esp_ports[] = { 0x140, 0x180, 0x280, 0 }; 45051078Speter#endif 45151078Speter 45251078Speter/* 45351078Speter * handle sysctl read/write requests for console speed 45451078Speter * 45551078Speter * In addition to setting comdefaultrate for I/O through /dev/console, 45651078Speter * also set the initial and lock values for the /dev/ttyXX device 45751078Speter * if there is one associated with the console. Finally, if the /dev/tty 45851078Speter * device has already been open, change the speed on the open running port 45951078Speter * itself. 46051078Speter */ 46151078Speter 46251078Speterstatic int 46362573Sphksysctl_machdep_comdefaultrate(SYSCTL_HANDLER_ARGS) 46451078Speter{ 46551078Speter int error, s; 46651078Speter speed_t newspeed; 46751078Speter struct com_s *com; 46851078Speter struct tty *tp; 46951078Speter 47051078Speter newspeed = comdefaultrate; 47151078Speter 47251078Speter error = sysctl_handle_opaque(oidp, &newspeed, sizeof newspeed, req); 47351078Speter if (error || !req->newptr) 47451078Speter return (error); 47551078Speter 47651078Speter comdefaultrate = newspeed; 47751078Speter 47851078Speter if (comconsole < 0) /* serial console not selected? */ 47951078Speter return (0); 48051078Speter 48151078Speter com = com_addr(comconsole); 48257915Simp if (com == NULL) 48351078Speter return (ENXIO); 48451078Speter 48551078Speter /* 48651078Speter * set the initial and lock rates for /dev/ttydXX and /dev/cuaXX 48751078Speter * (note, the lock rates really are boolean -- if non-zero, disallow 48851078Speter * speed changes) 48951078Speter */ 49051078Speter com->it_in.c_ispeed = com->it_in.c_ospeed = 49151078Speter com->lt_in.c_ispeed = com->lt_in.c_ospeed = 49251078Speter com->it_out.c_ispeed = com->it_out.c_ospeed = 49351078Speter com->lt_out.c_ispeed = com->lt_out.c_ospeed = comdefaultrate; 49451078Speter 49551078Speter /* 49651078Speter * if we're open, change the running rate too 49751078Speter */ 49851078Speter tp = com->tp; 49951078Speter if (tp && (tp->t_state & TS_ISOPEN)) { 50051078Speter tp->t_termios.c_ispeed = 50151078Speter tp->t_termios.c_ospeed = comdefaultrate; 50251078Speter s = spltty(); 50351078Speter error = comparam(tp, &tp->t_termios); 50451078Speter splx(s); 50551078Speter } 50651078Speter return error; 50751078Speter} 50851078Speter 50951078SpeterSYSCTL_PROC(_machdep, OID_AUTO, conspeed, CTLTYPE_INT | CTLFLAG_RW, 51051078Speter 0, 0, sysctl_machdep_comdefaultrate, "I", ""); 51151078Speter 51253344Speter#define SET_FLAG(dev, bit) device_set_flags(dev, device_get_flags(dev) | (bit)) 51353344Speter#define CLR_FLAG(dev, bit) device_set_flags(dev, device_get_flags(dev) & ~(bit)) 51453344Speter 51551078Speter#if NCARD > 0 51652471Simpstatic int 51752471Simpsio_pccard_probe(dev) 51852471Simp device_t dev; 51951078Speter{ 52054386Simp /* Do not probe IRQ - pccard doesn't turn on the interrupt line */ 52154386Simp /* until bus_setup_intr */ 52253344Speter SET_FLAG(dev, COM_C_NOPROBE); 52353344Speter 52458885Simp return (sioprobe(dev, 0)); 52552471Simp} 52651078Speter 52752471Simpstatic int 52852471Simpsio_pccard_attach(dev) 52952471Simp device_t dev; 53052471Simp{ 53158885Simp return (sioattach(dev, 0)); 53251078Speter} 53351078Speter 53451078Speter/* 53552471Simp * sio_detach - unload the driver and clear the table. 53651078Speter * XXX TODO: 53751078Speter * This is usually called when the card is ejected, but 53851078Speter * can be caused by a modunload of a controller driver. 53951078Speter * The idea is to reset the driver's view of the device 54051078Speter * and ensure that any driver entry points such as 54151078Speter * read and write do not hang. 54251078Speter */ 54353978Simpstatic int 54452471Simpsio_pccard_detach(dev) 54552471Simp device_t dev; 54651078Speter{ 54751078Speter struct com_s *com; 54865131Sphk int i; 54951078Speter 55052471Simp com = (struct com_s *) device_get_softc(dev); 55157915Simp if (com == NULL) { 55252471Simp device_printf(dev, "NULL com in siounload\n"); 55354386Simp return (0); 55451078Speter } 55554386Simp com->gone = 1; 55665131Sphk for (i = 0 ; i < 6; i++) 55765131Sphk destroy_dev(com->devs[i]); 55854386Simp if (com->irqres) { 55954386Simp bus_teardown_intr(dev, com->irqres, com->cookie); 56054386Simp bus_release_resource(dev, SYS_RES_IRQ, 0, com->irqres); 56154386Simp } 56254386Simp if (com->ioportres) 56354386Simp bus_release_resource(dev, SYS_RES_IOPORT, 0, com->ioportres); 56451078Speter if (com->tp && (com->tp->t_state & TS_ISOPEN)) { 56557915Simp device_printf(dev, "still open, forcing close\n"); 56651078Speter com->tp->t_gen++; 56751078Speter ttyclose(com->tp); 56851078Speter ttwakeup(com->tp); 56951078Speter ttwwakeup(com->tp); 57051078Speter } else { 57151078Speter if (com->ibuf != NULL) 57251078Speter free(com->ibuf, M_DEVBUF); 57351078Speter } 57457915Simp device_printf(dev, "unloaded\n"); 57553978Simp return (0); 57651078Speter} 57751078Speter#endif /* NCARD > 0 */ 57851078Speter 57958885Simp#if NPCI > 0 58058885Simpstruct pci_ids { 58158885Simp u_int32_t type; 58258885Simp const char *desc; 58358885Simp int rid; 58458885Simp}; 58551078Speter 58658885Simpstatic struct pci_ids pci_ids[] = { 58758885Simp { 0x100812b9, "3COM PCI FaxModem", 0x10 }, 58858885Simp { 0x048011c1, "ActionTec 56k FAX PCI Modem", 0x14 }, 58958885Simp { 0x00000000, NULL, 0 } 59058885Simp}; 59158885Simp 59258885Simpstatic int 59358885Simpsio_pci_attach(dev) 59458885Simp device_t dev; 59558885Simp{ 59658885Simp u_int32_t type; 59758885Simp struct pci_ids *id; 59858885Simp 59958885Simp type = pci_get_devid(dev); 60058885Simp id = pci_ids; 60158885Simp while (id->type && id->type != type) 60258885Simp id++; 60358885Simp if (id->desc == NULL) 60458885Simp return (ENXIO); 60558885Simp sio_pci_kludge_unit(dev); 60658885Simp return (sioattach(dev, id->rid)); 60758885Simp} 60858885Simp 60958885Simp/* 61058885Simp * Don't cut and paste this to other drivers. It is a horrible kludge 61158885Simp * which will fail to work and also be unnecessary in future versions. 61258885Simp */ 61358885Simpstatic void 61458885Simpsio_pci_kludge_unit(dev) 61558885Simp device_t dev; 61658885Simp{ 61758885Simp devclass_t dc; 61858885Simp int err; 61958885Simp int start; 62058885Simp int unit; 62158885Simp 62258885Simp unit = 0; 62358885Simp start = 0; 62458885Simp while (resource_int_value("sio", unit, "port", &start) == 0 && 62558885Simp start > 0) 62658885Simp unit++; 62758885Simp if (device_get_unit(dev) < unit) { 62858885Simp dc = device_get_devclass(dev); 62958885Simp while (devclass_get_device(dc, unit)) 63058885Simp unit++; 63158885Simp device_printf(dev, "moving to sio%d\n", unit); 63258885Simp err = device_set_unit(dev, unit); /* EVIL DO NOT COPY */ 63358885Simp if (err) 63458885Simp device_printf(dev, "error moving device %d\n", err); 63558885Simp } 63658885Simp} 63758885Simp 63858885Simpstatic int 63958885Simpsio_pci_probe(dev) 64058885Simp device_t dev; 64158885Simp{ 64258885Simp u_int32_t type; 64358885Simp struct pci_ids *id; 64458885Simp 64558885Simp type = pci_get_devid(dev); 64658885Simp id = pci_ids; 64758885Simp while (id->type && id->type != type) 64858885Simp id++; 64958885Simp if (id->desc == NULL) 65058885Simp return (ENXIO); 65158885Simp device_set_desc(dev, id->desc); 65258885Simp return (sioprobe(dev, id->rid)); 65358885Simp} 65458885Simp#endif /* NPCI > 0 */ 65558885Simp 65651078Speterstatic struct isa_pnp_id sio_ids[] = { 65751078Speter {0x0005d041, "Standard PC COM port"}, /* PNP0500 */ 65851078Speter {0x0105d041, "16550A-compatible COM port"}, /* PNP0501 */ 65951078Speter {0x0205d041, "Multiport serial device (non-intelligent 16550)"}, /* PNP0502 */ 66051078Speter {0x1005d041, "Generic IRDA-compatible device"}, /* PNP0510 */ 66151078Speter {0x1105d041, "Generic IRDA-compatible device"}, /* PNP0511 */ 66254944Speter /* Devices that do not have a compatid */ 66360696Stanimura {0x12206804, NULL}, /* ACH2012 - 5634BTS 56K Video Ready Modem */ 66454944Speter {0x7602a904, NULL}, /* AEI0276 - 56K v.90 Fax Modem (LKT) */ 66554944Speter {0x00007905, NULL}, /* AKY0000 - 56K Plug&Play Modem */ 66654944Speter {0x01405407, NULL}, /* AZT4001 - AZT3000 PnP SOUND DEVICE, MODEM */ 66754944Speter {0x56039008, NULL}, /* BDP0356 - Best Data 56x2 */ 66854944Speter {0x36339008, NULL}, /* BDP3336 - Best Data Prods. 336F */ 66954944Speter {0x0014490a, NULL}, /* BRI1400 - Boca 33.6 PnP */ 67054944Speter {0x0015490a, NULL}, /* BRI1500 - Internal Fax Data */ 67154944Speter {0x0034490a, NULL}, /* BRI3400 - Internal ACF Modem */ 67265438Ssheldonh {0x0094490a, NULL}, /* BRI9400 - Boca K56Flex PnP */ 67354944Speter {0x00b4490a, NULL}, /* BRIB400 - Boca 56k PnP */ 67454944Speter {0x0030320d, NULL}, /* CIR3000 - Cirrus Logic V43 */ 67556229Speter {0x0100440e, NULL}, /* CRD0001 - Cardinal MVP288IV ? */ 67660674Stanimura {0x36033610, NULL}, /* DAV0336 - DAVICOM 336PNP MODEM */ 67759888Stanimura {0x0000aa1a, NULL}, /* FUJ0000 - FUJITSU Modem 33600 PNP/I2 */ 67854944Speter {0x1200c31e, NULL}, /* GVC0012 - VF1128HV-R9 (win modem?) */ 67954944Speter {0x0303c31e, NULL}, /* GVC0303 - MaxTech 33.6 PnP D/F/V */ 68055124Speter {0x0505c31e, NULL}, /* GVC0505 - GVC 56k Faxmodem */ 68154944Speter {0x0050c31e, NULL}, /* GVC5000 - some GVC modem */ 68254944Speter {0x3800f91e, NULL}, /* GWY0038 - Telepath with v.90 */ 68354944Speter {0x9062f91e, NULL}, /* GWY6290 - Telepath with x2 Technology */ 68454944Speter {0x0000f435, NULL}, /* MOT0000 - Motorola ModemSURFR 33.6 Intern */ 68554944Speter {0x5015f435, NULL}, /* MOT1550 - Motorola ModemSURFR 56K Modem */ 68654944Speter {0xf015f435, NULL}, /* MOT15F0 - Motorola VoiceSURFR 56K Modem */ 68754944Speter {0x6045f435, NULL}, /* MOT4560 - Motorola ? */ 68854944Speter {0x61e7a338, NULL}, /* NECE761 - 33.6Modem */ 68960674Stanimura {0x0f804f3f, NULL}, /* OZO800f - Zoom 2812 (56k Modem) */ 69054944Speter {0x39804f3f, NULL}, /* OZO8039 - Zoom 56k flex */ 69157769Speter {0x3024a341, NULL}, /* PMC2430 - Pace 56 Voice Internal Modem */ 69254944Speter {0x1000eb49, NULL}, /* ROK0010 - Rockwell ? */ 69354944Speter {0x5002734a, NULL}, /* RSS0250 - 5614Jx3(G) Internal Modem */ 69460708Stanimura {0x6202734a, NULL}, /* RSS0262 - 5614Jx3[G] V90+K56Flex Modem */ 69554944Speter {0xc100ad4d, NULL}, /* SMM00C1 - Leopard 56k PnP */ 69656229Speter {0x9012b04e, NULL}, /* SUP1290 - Supra ? */ 69754944Speter {0x1013b04e, NULL}, /* SUP1310 - SupraExpress 336i PnP */ 69854944Speter {0x8013b04e, NULL}, /* SUP1380 - SupraExpress 288i PnP Voice */ 69954944Speter {0x8113b04e, NULL}, /* SUP1381 - SupraExpress 336i PnP Voice */ 70054944Speter {0x5016b04e, NULL}, /* SUP1650 - Supra 336i Sp Intl */ 70160947Stanimura {0x7016b04e, NULL}, /* SUP1670 - Supra 336i V+ Intl */ 70254944Speter {0x7420b04e, NULL}, /* SUP2070 - Supra ? */ 70354944Speter {0x8020b04e, NULL}, /* SUP2080 - Supra ? */ 70454944Speter {0x8420b04e, NULL}, /* SUP2084 - SupraExpress 56i PnP */ 70556229Speter {0x7121b04e, NULL}, /* SUP2171 - SupraExpress 56i Sp? */ 70654944Speter {0x8024b04e, NULL}, /* SUP2480 - Supra ? */ 70754944Speter {0x01007256, NULL}, /* USR0001 - U.S. Robotics Inc., Sportster W */ 70854944Speter {0x02007256, NULL}, /* USR0002 - U.S. Robotics Inc. Sportster 33. */ 70954944Speter {0x04007256, NULL}, /* USR0004 - USR Sportster 14.4k */ 71054944Speter {0x06007256, NULL}, /* USR0006 - USR Sportster 33.6k */ 71156229Speter {0x11007256, NULL}, /* USR0011 - USR ? */ 71254944Speter {0x01017256, NULL}, /* USR0101 - USR ? */ 71354944Speter {0x30207256, NULL}, /* USR2030 - U.S.Robotics Inc. Sportster 560 */ 71454944Speter {0x50207256, NULL}, /* USR2050 - U.S.Robotics Inc. Sportster 33. */ 71554944Speter {0x70207256, NULL}, /* USR2070 - U.S.Robotics Inc. Sportster 560 */ 71654944Speter {0x30307256, NULL}, /* USR3030 - U.S. Robotics 56K FAX INT */ 71754944Speter {0x31307256, NULL}, /* USR3031 - U.S. Robotics 56K FAX INT */ 71858848Speter {0x50307256, NULL}, /* USR3050 - U.S. Robotics 56K FAX INT */ 71954944Speter {0x70307256, NULL}, /* USR3070 - U.S. Robotics 56K Voice INT */ 72056229Speter {0x90307256, NULL}, /* USR3090 - USR ? */ 72164688Speter {0x70917256, NULL}, /* USR9170 - U.S. Robotics 56K FAX INT */ 72254944Speter {0x90917256, NULL}, /* USR9190 - USR 56k Voice INT */ 72354944Speter {0x0300695c, NULL}, /* WCI0003 - Fax/Voice/Modem/Speakphone/Asvd */ 72465469Ssheldonh {0x01a0896a, NULL}, /* ZTIA001 - Zoom Internal V90 Faxmodem */ 72554944Speter {0x61f7896a, NULL}, /* ZTIF761 - Zoom ComStar 33.6 */ 72651078Speter {0} 72751078Speter}; 72851078Speter 72956229Speter 73056229Speter 73151078Speterstatic int 73252471Simpsio_isa_probe(dev) 73352471Simp device_t dev; 73452471Simp{ 73552471Simp /* Check isapnp ids */ 73652471Simp if (ISA_PNP_PROBE(device_get_parent(dev), dev, sio_ids) == ENXIO) 73752471Simp return (ENXIO); 73858885Simp return (sioprobe(dev, 0)); 73952471Simp} 74052471Simp 74152471Simpstatic int 74258885Simpsioprobe(dev, xrid) 74351078Speter device_t dev; 74458885Simp int xrid; 74551078Speter{ 74653344Speter#if 0 74751078Speter static bool_t already_init; 74853344Speter device_t xdev; 74953344Speter#endif 75060471Snyan struct com_s *com; 75151078Speter bool_t failures[10]; 75251078Speter int fn; 75351078Speter device_t idev; 75451078Speter Port_t iobase; 75551078Speter intrmask_t irqmap[4]; 75651078Speter intrmask_t irqs; 75751078Speter u_char mcr_image; 75851078Speter int result; 75954206Speter u_long xirq; 76051088Speter u_int flags = device_get_flags(dev); 76151078Speter int rid; 76251078Speter struct resource *port; 76351078Speter 76458885Simp rid = xrid; 76551078Speter port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 76651078Speter 0, ~0, IO_COMSIZE, RF_ACTIVE); 76751078Speter if (!port) 76857915Simp return (ENXIO); 76951078Speter 77060471Snyan com = device_get_softc(dev); 77160471Snyan com->bst = rman_get_bustag(port); 77260471Snyan com->bsh = rman_get_bushandle(port); 77360471Snyan 77453344Speter#if 0 77553344Speter /* 77653344Speter * XXX this is broken - when we are first called, there are no 77753344Speter * previously configured IO ports. We could hard code 77853344Speter * 0x3f8, 0x2f8, 0x3e8, 0x2e8 etc but that's probably worse. 77953344Speter * This code has been doing nothing since the conversion since 78053344Speter * "count" is zero the first time around. 78153344Speter */ 78251078Speter if (!already_init) { 78351078Speter /* 78451078Speter * Turn off MCR_IENABLE for all likely serial ports. An unused 78551078Speter * port with its MCR_IENABLE gate open will inhibit interrupts 78651078Speter * from any used port that shares the interrupt vector. 78751078Speter * XXX the gate enable is elsewhere for some multiports. 78851078Speter */ 78951078Speter device_t *devs; 79053344Speter int count, i, xioport; 79151078Speter 79251078Speter devclass_get_devices(sio_devclass, &devs, &count); 79351078Speter for (i = 0; i < count; i++) { 79451078Speter xdev = devs[i]; 79554194Speter if (device_is_enabled(xdev) && 79654194Speter bus_get_resource(xdev, SYS_RES_IOPORT, 0, &xioport, 79754194Speter NULL) == 0) 79853344Speter outb(xioport + com_mcr, 0); 79951078Speter } 80051078Speter free(devs, M_TEMP); 80151078Speter already_init = TRUE; 80251078Speter } 80353344Speter#endif 80451078Speter 80551078Speter if (COM_LLCONSOLE(flags)) { 80651078Speter printf("sio%d: reserved for low-level i/o\n", 80751078Speter device_get_unit(dev)); 80856788Sbde bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 80951078Speter return (ENXIO); 81051078Speter } 81151078Speter 81251078Speter /* 81351078Speter * If the device is on a multiport card and has an AST/4 81451078Speter * compatible interrupt control register, initialize this 81551078Speter * register and prepare to leave MCR_IENABLE clear in the mcr. 81651078Speter * Otherwise, prepare to set MCR_IENABLE in the mcr. 81751078Speter * Point idev to the device struct giving the correct id_irq. 81851078Speter * This is the struct for the master device if there is one. 81951078Speter */ 82051078Speter idev = dev; 82151078Speter mcr_image = MCR_IENABLE; 82251078Speter#ifdef COM_MULTIPORT 82357234Sbde if (COM_ISMULTIPORT(flags)) { 82454206Speter Port_t xiobase; 82554206Speter u_long io; 82654206Speter 82751078Speter idev = devclass_get_device(sio_devclass, COM_MPMASTER(flags)); 82851078Speter if (idev == NULL) { 82951078Speter printf("sio%d: master device %d not configured\n", 83051078Speter device_get_unit(dev), COM_MPMASTER(flags)); 83151078Speter idev = dev; 83251078Speter } 83357234Sbde if (!COM_NOTAST4(flags)) { 83457234Sbde if (bus_get_resource(idev, SYS_RES_IOPORT, 0, &io, 83557234Sbde NULL) == 0) { 83657234Sbde xiobase = io; 83757234Sbde if (bus_get_resource(idev, SYS_RES_IRQ, 0, 83857234Sbde NULL, NULL) == 0) 83957234Sbde outb(xiobase + com_scr, 0x80); 84057234Sbde else 84157234Sbde outb(xiobase + com_scr, 0); 84257234Sbde } 84357234Sbde mcr_image = 0; 84451078Speter } 84551078Speter } 84651078Speter#endif /* COM_MULTIPORT */ 84754194Speter if (bus_get_resource(idev, SYS_RES_IRQ, 0, NULL, NULL) != 0) 84851078Speter mcr_image = 0; 84951078Speter 85051078Speter bzero(failures, sizeof failures); 85151078Speter iobase = rman_get_start(port); 85251078Speter 85351078Speter /* 85451078Speter * We don't want to get actual interrupts, just masked ones. 85551078Speter * Interrupts from this line should already be masked in the ICU, 85651078Speter * but mask them in the processor as well in case there are some 85751078Speter * (misconfigured) shared interrupts. 85851078Speter */ 85951078Speter disable_intr(); 86051078Speter/* EXTRA DELAY? */ 86151078Speter 86251078Speter /* 86351078Speter * Initialize the speed and the word size and wait long enough to 86451078Speter * drain the maximum of 16 bytes of junk in device output queues. 86551078Speter * The speed is undefined after a master reset and must be set 86651078Speter * before relying on anything related to output. There may be 86751078Speter * junk after a (very fast) soft reboot and (apparently) after 86851078Speter * master reset. 86951078Speter * XXX what about the UART bug avoided by waiting in comparam()? 87051078Speter * We don't want to to wait long enough to drain at 2 bps. 87151078Speter */ 87251078Speter if (iobase == siocniobase) 87351078Speter DELAY((16 + 1) * 1000000 / (comdefaultrate / 10)); 87451078Speter else { 87560471Snyan sio_setreg(com, com_cfcr, CFCR_DLAB | CFCR_8BITS); 87660471Snyan sio_setreg(com, com_dlbl, COMBRD(SIO_TEST_SPEED) & 0xff); 87760471Snyan sio_setreg(com, com_dlbh, (u_int) COMBRD(SIO_TEST_SPEED) >> 8); 87860471Snyan sio_setreg(com, com_cfcr, CFCR_8BITS); 87951078Speter DELAY((16 + 1) * 1000000 / (SIO_TEST_SPEED / 10)); 88051078Speter } 88151078Speter 88251078Speter /* 88351078Speter * Enable the interrupt gate and disable device interupts. This 88451078Speter * should leave the device driving the interrupt line low and 88551078Speter * guarantee an edge trigger if an interrupt can be generated. 88651078Speter */ 88751078Speter/* EXTRA DELAY? */ 88860471Snyan sio_setreg(com, com_mcr, mcr_image); 88960471Snyan sio_setreg(com, com_ier, 0); 89051078Speter DELAY(1000); /* XXX */ 89151078Speter irqmap[0] = isa_irq_pending(); 89251078Speter 89351078Speter /* 89451078Speter * Attempt to set loopback mode so that we can send a null byte 89551078Speter * without annoying any external device. 89651078Speter */ 89751078Speter/* EXTRA DELAY? */ 89860471Snyan sio_setreg(com, com_mcr, mcr_image | MCR_LOOPBACK); 89951078Speter 90051078Speter /* 90151078Speter * Attempt to generate an output interrupt. On 8250's, setting 90251078Speter * IER_ETXRDY generates an interrupt independent of the current 90351078Speter * setting and independent of whether the THR is empty. On 16450's, 90451078Speter * setting IER_ETXRDY generates an interrupt independent of the 90551078Speter * current setting. On 16550A's, setting IER_ETXRDY only 90651078Speter * generates an interrupt when IER_ETXRDY is not already set. 90751078Speter */ 90860471Snyan sio_setreg(com, com_ier, IER_ETXRDY); 90951078Speter 91051078Speter /* 91151078Speter * On some 16x50 incompatibles, setting IER_ETXRDY doesn't generate 91251078Speter * an interrupt. They'd better generate one for actually doing 91351078Speter * output. Loopback may be broken on the same incompatibles but 91451078Speter * it's unlikely to do more than allow the null byte out. 91551078Speter */ 91660471Snyan sio_setreg(com, com_data, 0); 91751078Speter DELAY((1 + 2) * 1000000 / (SIO_TEST_SPEED / 10)); 91851078Speter 91951078Speter /* 92051078Speter * Turn off loopback mode so that the interrupt gate works again 92151078Speter * (MCR_IENABLE was hidden). This should leave the device driving 92251078Speter * an interrupt line high. It doesn't matter if the interrupt 92351078Speter * line oscillates while we are not looking at it, since interrupts 92451078Speter * are disabled. 92551078Speter */ 92651078Speter/* EXTRA DELAY? */ 92760471Snyan sio_setreg(com, com_mcr, mcr_image); 92851078Speter 92951078Speter /* 93052471Simp * Some pcmcia cards have the "TXRDY bug", so we check everyone 93151078Speter * for IIR_TXRDY implementation ( Palido 321s, DC-1S... ) 93251078Speter */ 93353370Speter if (COM_NOPROBE(flags)) { 93453370Speter /* Reading IIR register twice */ 93553370Speter for (fn = 0; fn < 2; fn ++) { 93653370Speter DELAY(10000); 93760471Snyan failures[6] = sio_getreg(com, com_iir); 93853370Speter } 93953370Speter /* Check IIR_TXRDY clear ? */ 94053370Speter result = 0; 94153370Speter if (failures[6] & IIR_TXRDY) { 94253370Speter /* Nop, Double check with clearing IER */ 94360471Snyan sio_setreg(com, com_ier, 0); 94460471Snyan if (sio_getreg(com, com_iir) & IIR_NOPEND) { 94553370Speter /* Ok. we're familia this gang */ 94653370Speter SET_FLAG(dev, COM_C_IIR_TXRDYBUG); 94753370Speter } else { 94853370Speter /* Unknown, Just omit this chip.. XXX */ 94953370Speter result = ENXIO; 95053370Speter } 95151078Speter } else { 95253370Speter /* OK. this is well-known guys */ 95353370Speter CLR_FLAG(dev, COM_C_IIR_TXRDYBUG); 95451078Speter } 95560471Snyan sio_setreg(com, com_cfcr, CFCR_8BITS); 95653344Speter enable_intr(); 95753344Speter bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 95853344Speter return (iobase == siocniobase ? 0 : result); 95953344Speter } 96053344Speter 96151078Speter /* 96251078Speter * Check that 96351078Speter * o the CFCR, IER and MCR in UART hold the values written to them 96451078Speter * (the values happen to be all distinct - this is good for 96551078Speter * avoiding false positive tests from bus echoes). 96651078Speter * o an output interrupt is generated and its vector is correct. 96751078Speter * o the interrupt goes away when the IIR in the UART is read. 96851078Speter */ 96951078Speter/* EXTRA DELAY? */ 97060471Snyan failures[0] = sio_getreg(com, com_cfcr) - CFCR_8BITS; 97160471Snyan failures[1] = sio_getreg(com, com_ier) - IER_ETXRDY; 97260471Snyan failures[2] = sio_getreg(com, com_mcr) - mcr_image; 97351078Speter DELAY(10000); /* Some internal modems need this time */ 97451078Speter irqmap[1] = isa_irq_pending(); 97560471Snyan failures[4] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_TXRDY; 97651078Speter DELAY(1000); /* XXX */ 97751078Speter irqmap[2] = isa_irq_pending(); 97860471Snyan failures[6] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 97951078Speter 98051078Speter /* 98151078Speter * Turn off all device interrupts and check that they go off properly. 98251078Speter * Leave MCR_IENABLE alone. For ports without a master port, it gates 98351078Speter * the OUT2 output of the UART to 98451078Speter * the ICU input. Closing the gate would give a floating ICU input 98551078Speter * (unless there is another device driving it) and spurious interrupts. 98651078Speter * (On the system that this was first tested on, the input floats high 98751078Speter * and gives a (masked) interrupt as soon as the gate is closed.) 98851078Speter */ 98960471Snyan sio_setreg(com, com_ier, 0); 99060471Snyan sio_setreg(com, com_cfcr, CFCR_8BITS); /* dummy to avoid bus echo */ 99160471Snyan failures[7] = sio_getreg(com, com_ier); 99251078Speter DELAY(1000); /* XXX */ 99351078Speter irqmap[3] = isa_irq_pending(); 99460471Snyan failures[9] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 99551078Speter 99651078Speter enable_intr(); 99751078Speter 99851078Speter irqs = irqmap[1] & ~irqmap[0]; 99954194Speter if (bus_get_resource(idev, SYS_RES_IRQ, 0, &xirq, NULL) == 0 && 100054194Speter ((1 << xirq) & irqs) == 0) 100151078Speter printf( 100254206Speter "sio%d: configured irq %ld not in bitmap of probed irqs %#x\n", 100353344Speter device_get_unit(dev), xirq, irqs); 100451078Speter if (bootverbose) 100551078Speter printf("sio%d: irq maps: %#x %#x %#x %#x\n", 100651078Speter device_get_unit(dev), 100751078Speter irqmap[0], irqmap[1], irqmap[2], irqmap[3]); 100851078Speter 100951078Speter result = 0; 101051078Speter for (fn = 0; fn < sizeof failures; ++fn) 101151078Speter if (failures[fn]) { 101260471Snyan sio_setreg(com, com_mcr, 0); 101351078Speter result = ENXIO; 101451078Speter if (bootverbose) { 101551078Speter printf("sio%d: probe failed test(s):", 101651078Speter device_get_unit(dev)); 101751078Speter for (fn = 0; fn < sizeof failures; ++fn) 101851078Speter if (failures[fn]) 101951078Speter printf(" %d", fn); 102051078Speter printf("\n"); 102151078Speter } 102251078Speter break; 102351078Speter } 102451078Speter bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 102551078Speter return (iobase == siocniobase ? 0 : result); 102651078Speter} 102751078Speter 102851078Speter#ifdef COM_ESP 102951078Speterstatic int 103051078Speterespattach(com, esp_port) 103151078Speter struct com_s *com; 103251078Speter Port_t esp_port; 103351078Speter{ 103451078Speter u_char dips; 103551078Speter u_char val; 103651078Speter 103751078Speter /* 103851078Speter * Check the ESP-specific I/O port to see if we're an ESP 103951078Speter * card. If not, return failure immediately. 104051078Speter */ 104151078Speter if ((inb(esp_port) & 0xf3) == 0) { 104251078Speter printf(" port 0x%x is not an ESP board?\n", esp_port); 104351078Speter return (0); 104451078Speter } 104551078Speter 104651078Speter /* 104751078Speter * We've got something that claims to be a Hayes ESP card. 104851078Speter * Let's hope so. 104951078Speter */ 105051078Speter 105151078Speter /* Get the dip-switch configuration */ 105251078Speter outb(esp_port + ESP_CMD1, ESP_GETDIPS); 105351078Speter dips = inb(esp_port + ESP_STATUS1); 105451078Speter 105551078Speter /* 105651078Speter * Bits 0,1 of dips say which COM port we are. 105751078Speter */ 105860471Snyan if (rman_get_start(com->ioportres) == likely_com_ports[dips & 0x03]) 105951078Speter printf(" : ESP"); 106051078Speter else { 106151078Speter printf(" esp_port has com %d\n", dips & 0x03); 106251078Speter return (0); 106351078Speter } 106451078Speter 106551078Speter /* 106651078Speter * Check for ESP version 2.0 or later: bits 4,5,6 = 010. 106751078Speter */ 106851078Speter outb(esp_port + ESP_CMD1, ESP_GETTEST); 106951078Speter val = inb(esp_port + ESP_STATUS1); /* clear reg 1 */ 107051078Speter val = inb(esp_port + ESP_STATUS2); 107151078Speter if ((val & 0x70) < 0x20) { 107251078Speter printf("-old (%o)", val & 0x70); 107351078Speter return (0); 107451078Speter } 107551078Speter 107651078Speter /* 107751078Speter * Check for ability to emulate 16550: bit 7 == 1 107851078Speter */ 107951078Speter if ((dips & 0x80) == 0) { 108051078Speter printf(" slave"); 108151078Speter return (0); 108251078Speter } 108351078Speter 108451078Speter /* 108551078Speter * Okay, we seem to be a Hayes ESP card. Whee. 108651078Speter */ 108751078Speter com->esp = TRUE; 108851078Speter com->esp_port = esp_port; 108951078Speter return (1); 109051078Speter} 109151078Speter#endif /* COM_ESP */ 109251078Speter 109351078Speterstatic int 109452471Simpsio_isa_attach(dev) 109552471Simp device_t dev; 109652471Simp{ 109758885Simp return (sioattach(dev, 0)); 109852471Simp} 109952471Simp 110052471Simpstatic int 110158885Simpsioattach(dev, xrid) 110251078Speter device_t dev; 110358885Simp int xrid; 110451078Speter{ 110551078Speter struct com_s *com; 110651078Speter#ifdef COM_ESP 110751078Speter Port_t *espp; 110851078Speter#endif 110951078Speter Port_t iobase; 111051078Speter int unit; 111153344Speter u_int flags; 111251078Speter int rid; 111351078Speter struct resource *port; 111453344Speter int ret; 111551078Speter 111658885Simp rid = xrid; 111751078Speter port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 111851078Speter 0, ~0, IO_COMSIZE, RF_ACTIVE); 111951078Speter if (!port) 112057915Simp return (ENXIO); 112151078Speter 112251078Speter iobase = rman_get_start(port); 112351078Speter unit = device_get_unit(dev); 112451078Speter com = device_get_softc(dev); 112553344Speter flags = device_get_flags(dev); 112651078Speter 112753344Speter if (unit >= sio_numunits) 112853344Speter sio_numunits = unit + 1; 112951078Speter /* 113051078Speter * sioprobe() has initialized the device registers as follows: 113151078Speter * o cfcr = CFCR_8BITS. 113251078Speter * It is most important that CFCR_DLAB is off, so that the 113351078Speter * data port is not hidden when we enable interrupts. 113451078Speter * o ier = 0. 113551078Speter * Interrupts are only enabled when the line is open. 113651078Speter * o mcr = MCR_IENABLE, or 0 if the port has AST/4 compatible 113751078Speter * interrupt control register or the config specifies no irq. 113851078Speter * Keeping MCR_DTR and MCR_RTS off might stop the external 113951078Speter * device from sending before we are ready. 114051078Speter */ 114151078Speter bzero(com, sizeof *com); 114251078Speter com->unit = unit; 114351078Speter com->ioportres = port; 114460471Snyan com->bst = rman_get_bustag(port); 114560471Snyan com->bsh = rman_get_bushandle(port); 114651078Speter com->cfcr_image = CFCR_8BITS; 114751078Speter com->dtr_wait = 3 * hz; 114851078Speter com->loses_outints = COM_LOSESOUTINTS(flags) != 0; 114957234Sbde com->no_irq = bus_get_resource(dev, SYS_RES_IRQ, 0, NULL, NULL) != 0; 115051078Speter com->tx_fifo_size = 1; 115151078Speter com->obufs[0].l_head = com->obuf1; 115251078Speter com->obufs[1].l_head = com->obuf2; 115351078Speter 115451078Speter com->data_port = iobase + com_data; 115551078Speter com->int_id_port = iobase + com_iir; 115651078Speter com->modem_ctl_port = iobase + com_mcr; 115751078Speter com->mcr_image = inb(com->modem_ctl_port); 115851078Speter com->line_status_port = iobase + com_lsr; 115951078Speter com->modem_status_port = iobase + com_msr; 116051078Speter com->intr_ctl_port = iobase + com_ier; 116151078Speter 116251078Speter /* 116351078Speter * We don't use all the flags from <sys/ttydefaults.h> since they 116451078Speter * are only relevant for logins. It's important to have echo off 116551078Speter * initially so that the line doesn't start blathering before the 116651078Speter * echo flag can be turned off. 116751078Speter */ 116851078Speter com->it_in.c_iflag = 0; 116951078Speter com->it_in.c_oflag = 0; 117051078Speter com->it_in.c_cflag = TTYDEF_CFLAG; 117151078Speter com->it_in.c_lflag = 0; 117251078Speter if (unit == comconsole) { 117351078Speter com->it_in.c_iflag = TTYDEF_IFLAG; 117451078Speter com->it_in.c_oflag = TTYDEF_OFLAG; 117551078Speter com->it_in.c_cflag = TTYDEF_CFLAG | CLOCAL; 117651078Speter com->it_in.c_lflag = TTYDEF_LFLAG; 117751078Speter com->lt_out.c_cflag = com->lt_in.c_cflag = CLOCAL; 117851078Speter com->lt_out.c_ispeed = com->lt_out.c_ospeed = 117951078Speter com->lt_in.c_ispeed = com->lt_in.c_ospeed = 118051078Speter com->it_in.c_ispeed = com->it_in.c_ospeed = comdefaultrate; 118151078Speter } else 118251078Speter com->it_in.c_ispeed = com->it_in.c_ospeed = TTYDEF_SPEED; 118351078Speter if (siosetwater(com, com->it_in.c_ispeed) != 0) { 118451078Speter enable_intr(); 118556788Sbde /* 118656788Sbde * Leave i/o resources allocated if this is a `cn'-level 118756788Sbde * console, so that other devices can't snarf them. 118856788Sbde */ 118956788Sbde if (iobase != siocniobase) 119056788Sbde bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 119156788Sbde return (ENOMEM); 119251078Speter } 119351078Speter enable_intr(); 119451078Speter termioschars(&com->it_in); 119551078Speter com->it_out = com->it_in; 119651078Speter 119751078Speter /* attempt to determine UART type */ 119851078Speter printf("sio%d: type", unit); 119951078Speter 120051078Speter 120151078Speter#ifdef COM_MULTIPORT 120251078Speter if (!COM_ISMULTIPORT(flags) && !COM_IIR_TXRDYBUG(flags)) 120351078Speter#else 120451078Speter if (!COM_IIR_TXRDYBUG(flags)) 120551078Speter#endif 120651078Speter { 120751078Speter u_char scr; 120851078Speter u_char scr1; 120951078Speter u_char scr2; 121051078Speter 121160471Snyan scr = sio_getreg(com, com_scr); 121260471Snyan sio_setreg(com, com_scr, 0xa5); 121360471Snyan scr1 = sio_getreg(com, com_scr); 121460471Snyan sio_setreg(com, com_scr, 0x5a); 121560471Snyan scr2 = sio_getreg(com, com_scr); 121660471Snyan sio_setreg(com, com_scr, scr); 121751078Speter if (scr1 != 0xa5 || scr2 != 0x5a) { 121851078Speter printf(" 8250"); 121951078Speter goto determined_type; 122051078Speter } 122151078Speter } 122260471Snyan sio_setreg(com, com_fifo, FIFO_ENABLE | FIFO_RX_HIGH); 122351078Speter DELAY(100); 122451078Speter com->st16650a = 0; 122551078Speter switch (inb(com->int_id_port) & IIR_FIFO_MASK) { 122651078Speter case FIFO_RX_LOW: 122751078Speter printf(" 16450"); 122851078Speter break; 122951078Speter case FIFO_RX_MEDL: 123051078Speter printf(" 16450?"); 123151078Speter break; 123251078Speter case FIFO_RX_MEDH: 123351078Speter printf(" 16550?"); 123451078Speter break; 123551078Speter case FIFO_RX_HIGH: 123651078Speter if (COM_NOFIFO(flags)) { 123751078Speter printf(" 16550A fifo disabled"); 123851078Speter } else { 123951078Speter com->hasfifo = TRUE; 124051078Speter if (COM_ST16650A(flags)) { 124151078Speter com->st16650a = 1; 124251078Speter com->tx_fifo_size = 32; 124351078Speter printf(" ST16650A"); 124451078Speter } else { 124551078Speter com->tx_fifo_size = COM_FIFOSIZE(flags); 124651078Speter printf(" 16550A"); 124751078Speter } 124851078Speter } 124951078Speter#ifdef COM_ESP 125051078Speter for (espp = likely_esp_ports; *espp != 0; espp++) 125151078Speter if (espattach(com, *espp)) { 125251078Speter com->tx_fifo_size = 1024; 125351078Speter break; 125451078Speter } 125551078Speter#endif 125651078Speter if (!com->st16650a) { 125751078Speter if (!com->tx_fifo_size) 125851078Speter com->tx_fifo_size = 16; 125951078Speter else 126051078Speter printf(" lookalike with %d bytes FIFO", 126151078Speter com->tx_fifo_size); 126251078Speter } 126351078Speter 126451078Speter break; 126551078Speter } 126651078Speter 126751078Speter#ifdef COM_ESP 126851078Speter if (com->esp) { 126951078Speter /* 127051078Speter * Set 16550 compatibility mode. 127151078Speter * We don't use the ESP_MODE_SCALE bit to increase the 127251078Speter * fifo trigger levels because we can't handle large 127351078Speter * bursts of input. 127451078Speter * XXX flow control should be set in comparam(), not here. 127551078Speter */ 127651078Speter outb(com->esp_port + ESP_CMD1, ESP_SETMODE); 127751078Speter outb(com->esp_port + ESP_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO); 127851078Speter 127951078Speter /* Set RTS/CTS flow control. */ 128051078Speter outb(com->esp_port + ESP_CMD1, ESP_SETFLOWTYPE); 128151078Speter outb(com->esp_port + ESP_CMD2, ESP_FLOW_RTS); 128251078Speter outb(com->esp_port + ESP_CMD2, ESP_FLOW_CTS); 128351078Speter 128451078Speter /* Set flow-control levels. */ 128551078Speter outb(com->esp_port + ESP_CMD1, ESP_SETRXFLOW); 128651078Speter outb(com->esp_port + ESP_CMD2, HIBYTE(768)); 128751078Speter outb(com->esp_port + ESP_CMD2, LOBYTE(768)); 128851078Speter outb(com->esp_port + ESP_CMD2, HIBYTE(512)); 128951078Speter outb(com->esp_port + ESP_CMD2, LOBYTE(512)); 129051078Speter } 129151078Speter#endif /* COM_ESP */ 129260471Snyan sio_setreg(com, com_fifo, 0); 129351078Speterdetermined_type: ; 129451078Speter 129551078Speter#ifdef COM_MULTIPORT 129651078Speter if (COM_ISMULTIPORT(flags)) { 129753344Speter device_t masterdev; 129853344Speter 129951078Speter com->multiport = TRUE; 130051078Speter printf(" (multiport"); 130151078Speter if (unit == COM_MPMASTER(flags)) 130251078Speter printf(" master"); 130351078Speter printf(")"); 130453344Speter masterdev = devclass_get_device(sio_devclass, 130553344Speter COM_MPMASTER(flags)); 130657234Sbde com->no_irq = (masterdev == NULL || bus_get_resource(masterdev, 130757234Sbde SYS_RES_IRQ, 0, NULL, NULL) != 0); 130851078Speter } 130951078Speter#endif /* COM_MULTIPORT */ 131051078Speter if (unit == comconsole) 131151078Speter printf(", console"); 131253344Speter if (COM_IIR_TXRDYBUG(flags)) 131351078Speter printf(" with a bogus IIR_TXRDY register"); 131451078Speter printf("\n"); 131551078Speter 131651078Speter if (!sio_registered) { 131751078Speter register_swi(SWI_TTY, siopoll); 131851078Speter sio_registered = TRUE; 131951078Speter } 132065131Sphk com->devs[0] = make_dev(&sio_cdevsw, unit, 132151078Speter UID_ROOT, GID_WHEEL, 0600, "ttyd%r", unit); 132265131Sphk com->devs[1] = make_dev(&sio_cdevsw, unit | CONTROL_INIT_STATE, 132351078Speter UID_ROOT, GID_WHEEL, 0600, "ttyid%r", unit); 132465131Sphk com->devs[2] = make_dev(&sio_cdevsw, unit | CONTROL_LOCK_STATE, 132551078Speter UID_ROOT, GID_WHEEL, 0600, "ttyld%r", unit); 132665131Sphk com->devs[3] = make_dev(&sio_cdevsw, unit | CALLOUT_MASK, 132751078Speter UID_UUCP, GID_DIALER, 0660, "cuaa%r", unit); 132865131Sphk com->devs[4] = make_dev(&sio_cdevsw, 132965131Sphk unit | CALLOUT_MASK | CONTROL_INIT_STATE, 133051078Speter UID_UUCP, GID_DIALER, 0660, "cuaia%r", unit); 133165131Sphk com->devs[5] = make_dev(&sio_cdevsw, 133265131Sphk unit | CALLOUT_MASK | CONTROL_LOCK_STATE, 133351078Speter UID_UUCP, GID_DIALER, 0660, "cuala%r", unit); 133451078Speter com->flags = flags; 133551078Speter com->pps.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR; 133651078Speter pps_init(&com->pps); 133751078Speter 133851078Speter rid = 0; 133951078Speter com->irqres = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0ul, ~0ul, 1, 134053344Speter RF_ACTIVE); 134153344Speter if (com->irqres) { 134253344Speter ret = BUS_SETUP_INTR(device_get_parent(dev), dev, com->irqres, 134354194Speter INTR_TYPE_TTY | INTR_TYPE_FAST, 134454386Simp siointr, com, &com->cookie); 134554194Speter if (ret) { 134654194Speter ret = BUS_SETUP_INTR(device_get_parent(dev), dev, 134754194Speter com->irqres, INTR_TYPE_TTY, 134854386Simp siointr, com, &com->cookie); 134954194Speter if (ret == 0) 135054194Speter device_printf(dev, "unable to activate interrupt in fast mode - using normal mode"); 135154194Speter } 135253344Speter if (ret) 135353344Speter device_printf(dev, "could not activate interrupt\n"); 135453344Speter } 135551078Speter 135651078Speter return (0); 135751078Speter} 135851078Speter 135951078Speterstatic int 136051078Spetersioopen(dev, flag, mode, p) 136151078Speter dev_t dev; 136251078Speter int flag; 136351078Speter int mode; 136451078Speter struct proc *p; 136551078Speter{ 136651078Speter struct com_s *com; 136751078Speter int error; 136851078Speter int mynor; 136951078Speter int s; 137051078Speter struct tty *tp; 137151078Speter int unit; 137251078Speter 137351078Speter mynor = minor(dev); 137451078Speter unit = MINOR_TO_UNIT(mynor); 137553344Speter com = com_addr(unit); 137653344Speter if (com == NULL) 137751078Speter return (ENXIO); 137851078Speter if (com->gone) 137951078Speter return (ENXIO); 138051078Speter if (mynor & CONTROL_MASK) 138151078Speter return (0); 138251078Speter tp = dev->si_tty = com->tp = ttymalloc(com->tp); 138351078Speter s = spltty(); 138451078Speter /* 138551078Speter * We jump to this label after all non-interrupted sleeps to pick 138651078Speter * up any changes of the device state. 138751078Speter */ 138851078Speteropen_top: 138951078Speter while (com->state & CS_DTR_OFF) { 139051078Speter error = tsleep(&com->dtr_wait, TTIPRI | PCATCH, "siodtr", 0); 139151078Speter if (com_addr(unit) == NULL) 139251078Speter return (ENXIO); 139351078Speter if (error != 0 || com->gone) 139451078Speter goto out; 139551078Speter } 139651078Speter if (tp->t_state & TS_ISOPEN) { 139751078Speter /* 139851078Speter * The device is open, so everything has been initialized. 139951078Speter * Handle conflicts. 140051078Speter */ 140151078Speter if (mynor & CALLOUT_MASK) { 140251078Speter if (!com->active_out) { 140351078Speter error = EBUSY; 140451078Speter goto out; 140551078Speter } 140651078Speter } else { 140751078Speter if (com->active_out) { 140851078Speter if (flag & O_NONBLOCK) { 140951078Speter error = EBUSY; 141051078Speter goto out; 141151078Speter } 141251078Speter error = tsleep(&com->active_out, 141351078Speter TTIPRI | PCATCH, "siobi", 0); 141451078Speter if (com_addr(unit) == NULL) 141551078Speter return (ENXIO); 141651078Speter if (error != 0 || com->gone) 141751078Speter goto out; 141851078Speter goto open_top; 141951078Speter } 142051078Speter } 142151078Speter if (tp->t_state & TS_XCLUDE && 142251078Speter suser(p)) { 142351078Speter error = EBUSY; 142451078Speter goto out; 142551078Speter } 142651078Speter } else { 142751078Speter /* 142851078Speter * The device isn't open, so there are no conflicts. 142951078Speter * Initialize it. Initialization is done twice in many 143051078Speter * cases: to preempt sleeping callin opens if we are 143151078Speter * callout, and to complete a callin open after DCD rises. 143251078Speter */ 143351078Speter tp->t_oproc = comstart; 143451078Speter tp->t_param = comparam; 143551654Sphk tp->t_stop = comstop; 143651078Speter tp->t_dev = dev; 143751078Speter tp->t_termios = mynor & CALLOUT_MASK 143851078Speter ? com->it_out : com->it_in; 143951078Speter (void)commctl(com, TIOCM_DTR | TIOCM_RTS, DMSET); 144051078Speter com->poll = com->no_irq; 144151078Speter com->poll_output = com->loses_outints; 144251078Speter ++com->wopeners; 144351078Speter error = comparam(tp, &tp->t_termios); 144451078Speter --com->wopeners; 144551078Speter if (error != 0) 144651078Speter goto out; 144751078Speter /* 144851078Speter * XXX we should goto open_top if comparam() slept. 144951078Speter */ 145051078Speter if (com->hasfifo) { 145151078Speter /* 145251078Speter * (Re)enable and drain fifos. 145351078Speter * 145451078Speter * Certain SMC chips cause problems if the fifos 145551078Speter * are enabled while input is ready. Turn off the 145651078Speter * fifo if necessary to clear the input. We test 145751078Speter * the input ready bit after enabling the fifos 145851078Speter * since we've already enabled them in comparam() 145951078Speter * and to handle races between enabling and fresh 146051078Speter * input. 146151078Speter */ 146251078Speter while (TRUE) { 146360471Snyan sio_setreg(com, com_fifo, 146460471Snyan FIFO_RCV_RST | FIFO_XMT_RST 146560471Snyan | com->fifo_image); 146651078Speter /* 146751078Speter * XXX the delays are for superstitious 146851078Speter * historical reasons. It must be less than 146951078Speter * the character time at the maximum 147051078Speter * supported speed (87 usec at 115200 bps 147151078Speter * 8N1). Otherwise we might loop endlessly 147251078Speter * if data is streaming in. We used to use 147351078Speter * delays of 100. That usually worked 147451078Speter * because DELAY(100) used to usually delay 147551078Speter * for about 85 usec instead of 100. 147651078Speter */ 147751078Speter DELAY(50); 147851078Speter if (!(inb(com->line_status_port) & LSR_RXRDY)) 147951078Speter break; 148060471Snyan sio_setreg(com, com_fifo, 0); 148151078Speter DELAY(50); 148251078Speter (void) inb(com->data_port); 148351078Speter } 148451078Speter } 148551078Speter 148651078Speter disable_intr(); 148751078Speter (void) inb(com->line_status_port); 148851078Speter (void) inb(com->data_port); 148951078Speter com->prev_modem_status = com->last_modem_status 149051078Speter = inb(com->modem_status_port); 149151078Speter if (COM_IIR_TXRDYBUG(com->flags)) { 149251078Speter outb(com->intr_ctl_port, IER_ERXRDY | IER_ERLS 149351078Speter | IER_EMSC); 149451078Speter } else { 149551078Speter outb(com->intr_ctl_port, IER_ERXRDY | IER_ETXRDY 149651078Speter | IER_ERLS | IER_EMSC); 149751078Speter } 149851078Speter enable_intr(); 149951078Speter /* 150051078Speter * Handle initial DCD. Callout devices get a fake initial 150151078Speter * DCD (trapdoor DCD). If we are callout, then any sleeping 150251078Speter * callin opens get woken up and resume sleeping on "siobi" 150351078Speter * instead of "siodcd". 150451078Speter */ 150551078Speter /* 150651078Speter * XXX `mynor & CALLOUT_MASK' should be 150751078Speter * `tp->t_cflag & (SOFT_CARRIER | TRAPDOOR_CARRIER) where 150851078Speter * TRAPDOOR_CARRIER is the default initial state for callout 150951078Speter * devices and SOFT_CARRIER is like CLOCAL except it hides 151051078Speter * the true carrier. 151151078Speter */ 151251078Speter if (com->prev_modem_status & MSR_DCD || mynor & CALLOUT_MASK) 151351078Speter (*linesw[tp->t_line].l_modem)(tp, 1); 151451078Speter } 151551078Speter /* 151651078Speter * Wait for DCD if necessary. 151751078Speter */ 151851078Speter if (!(tp->t_state & TS_CARR_ON) && !(mynor & CALLOUT_MASK) 151951078Speter && !(tp->t_cflag & CLOCAL) && !(flag & O_NONBLOCK)) { 152051078Speter ++com->wopeners; 152151078Speter error = tsleep(TSA_CARR_ON(tp), TTIPRI | PCATCH, "siodcd", 0); 152251078Speter if (com_addr(unit) == NULL) 152351078Speter return (ENXIO); 152451078Speter --com->wopeners; 152551078Speter if (error != 0 || com->gone) 152651078Speter goto out; 152751078Speter goto open_top; 152851078Speter } 152951078Speter error = (*linesw[tp->t_line].l_open)(dev, tp); 153051078Speter disc_optim(tp, &tp->t_termios, com); 153151078Speter if (tp->t_state & TS_ISOPEN && mynor & CALLOUT_MASK) 153251078Speter com->active_out = TRUE; 153351078Speter siosettimeout(); 153451078Speterout: 153551078Speter splx(s); 153651078Speter if (!(tp->t_state & TS_ISOPEN) && com->wopeners == 0) 153751078Speter comhardclose(com); 153851078Speter return (error); 153951078Speter} 154051078Speter 154151078Speterstatic int 154251078Spetersioclose(dev, flag, mode, p) 154351078Speter dev_t dev; 154451078Speter int flag; 154551078Speter int mode; 154651078Speter struct proc *p; 154751078Speter{ 154851078Speter struct com_s *com; 154951078Speter int mynor; 155051078Speter int s; 155151078Speter struct tty *tp; 155251078Speter 155351078Speter mynor = minor(dev); 155451078Speter if (mynor & CONTROL_MASK) 155551078Speter return (0); 155651078Speter com = com_addr(MINOR_TO_UNIT(mynor)); 155757915Simp if (com == NULL) 155857915Simp return (ENODEV); 155951078Speter tp = com->tp; 156051078Speter s = spltty(); 156151078Speter (*linesw[tp->t_line].l_close)(tp, flag); 156251078Speter disc_optim(tp, &tp->t_termios, com); 156351654Sphk comstop(tp, FREAD | FWRITE); 156451078Speter comhardclose(com); 156551078Speter ttyclose(tp); 156651078Speter siosettimeout(); 156751078Speter splx(s); 156851078Speter if (com->gone) { 156951078Speter printf("sio%d: gone\n", com->unit); 157051078Speter s = spltty(); 157151078Speter if (com->ibuf != NULL) 157251078Speter free(com->ibuf, M_DEVBUF); 157351078Speter bzero(tp, sizeof *tp); 157451078Speter splx(s); 157551078Speter } 157651078Speter return (0); 157751078Speter} 157851078Speter 157951078Speterstatic void 158051078Spetercomhardclose(com) 158151078Speter struct com_s *com; 158251078Speter{ 158351078Speter int s; 158451078Speter struct tty *tp; 158551078Speter int unit; 158651078Speter 158751078Speter unit = com->unit; 158851078Speter s = spltty(); 158951078Speter com->poll = FALSE; 159051078Speter com->poll_output = FALSE; 159151078Speter com->do_timestamp = FALSE; 159251078Speter com->do_dcd_timestamp = FALSE; 159351078Speter com->pps.ppsparam.mode = 0; 159460471Snyan sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 159551078Speter { 159660471Snyan sio_setreg(com, com_ier, 0); 159751078Speter tp = com->tp; 159851078Speter if (tp->t_cflag & HUPCL 159951078Speter /* 160051078Speter * XXX we will miss any carrier drop between here and the 160151078Speter * next open. Perhaps we should watch DCD even when the 160251078Speter * port is closed; it is not sufficient to check it at 160351078Speter * the next open because it might go up and down while 160451078Speter * we're not watching. 160551078Speter */ 160651078Speter || (!com->active_out 160751078Speter && !(com->prev_modem_status & MSR_DCD) 160851078Speter && !(com->it_in.c_cflag & CLOCAL)) 160951078Speter || !(tp->t_state & TS_ISOPEN)) { 161051078Speter (void)commctl(com, TIOCM_DTR, DMBIC); 161151078Speter if (com->dtr_wait != 0 && !(com->state & CS_DTR_OFF)) { 161251078Speter timeout(siodtrwakeup, com, com->dtr_wait); 161351078Speter com->state |= CS_DTR_OFF; 161451078Speter } 161551078Speter } 161651078Speter } 161751078Speter if (com->hasfifo) { 161851078Speter /* 161951078Speter * Disable fifos so that they are off after controlled 162051078Speter * reboots. Some BIOSes fail to detect 16550s when the 162151078Speter * fifos are enabled. 162251078Speter */ 162360471Snyan sio_setreg(com, com_fifo, 0); 162451078Speter } 162551078Speter com->active_out = FALSE; 162651078Speter wakeup(&com->active_out); 162751078Speter wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */ 162851078Speter splx(s); 162951078Speter} 163051078Speter 163151078Speterstatic int 163251078Spetersioread(dev, uio, flag) 163351078Speter dev_t dev; 163451078Speter struct uio *uio; 163551078Speter int flag; 163651078Speter{ 163751078Speter int mynor; 163851078Speter struct com_s *com; 163951078Speter 164051078Speter mynor = minor(dev); 164151078Speter if (mynor & CONTROL_MASK) 164251078Speter return (ENODEV); 164351078Speter com = com_addr(MINOR_TO_UNIT(mynor)); 164457915Simp if (com == NULL || com->gone) 164551078Speter return (ENODEV); 164651078Speter return ((*linesw[com->tp->t_line].l_read)(com->tp, uio, flag)); 164751078Speter} 164851078Speter 164951078Speterstatic int 165051078Spetersiowrite(dev, uio, flag) 165151078Speter dev_t dev; 165251078Speter struct uio *uio; 165351078Speter int flag; 165451078Speter{ 165551078Speter int mynor; 165651078Speter struct com_s *com; 165751078Speter int unit; 165851078Speter 165951078Speter mynor = minor(dev); 166051078Speter if (mynor & CONTROL_MASK) 166151078Speter return (ENODEV); 166251078Speter 166351078Speter unit = MINOR_TO_UNIT(mynor); 166451078Speter com = com_addr(unit); 166557915Simp if (com == NULL || com->gone) 166651078Speter return (ENODEV); 166751078Speter /* 166851078Speter * (XXX) We disallow virtual consoles if the physical console is 166951078Speter * a serial port. This is in case there is a display attached that 167051078Speter * is not the console. In that situation we don't need/want the X 167151078Speter * server taking over the console. 167251078Speter */ 167351078Speter if (constty != NULL && unit == comconsole) 167451078Speter constty = NULL; 167551078Speter return ((*linesw[com->tp->t_line].l_write)(com->tp, uio, flag)); 167651078Speter} 167751078Speter 167851078Speterstatic void 167951078Spetersiobusycheck(chan) 168051078Speter void *chan; 168151078Speter{ 168251078Speter struct com_s *com; 168351078Speter int s; 168451078Speter 168551078Speter com = (struct com_s *)chan; 168651078Speter 168751078Speter /* 168851078Speter * Clear TS_BUSY if low-level output is complete. 168951078Speter * spl locking is sufficient because siointr1() does not set CS_BUSY. 169051078Speter * If siointr1() clears CS_BUSY after we look at it, then we'll get 169151078Speter * called again. Reading the line status port outside of siointr1() 169251078Speter * is safe because CS_BUSY is clear so there are no output interrupts 169351078Speter * to lose. 169451078Speter */ 169551078Speter s = spltty(); 169651078Speter if (com->state & CS_BUSY) 169751078Speter com->extra_state &= ~CSE_BUSYCHECK; /* False alarm. */ 169851078Speter else if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) 169951078Speter == (LSR_TSRE | LSR_TXRDY)) { 170051078Speter com->tp->t_state &= ~TS_BUSY; 170151078Speter ttwwakeup(com->tp); 170251078Speter com->extra_state &= ~CSE_BUSYCHECK; 170351078Speter } else 170451078Speter timeout(siobusycheck, com, hz / 100); 170551078Speter splx(s); 170651078Speter} 170751078Speter 170851078Speterstatic void 170951078Spetersiodtrwakeup(chan) 171051078Speter void *chan; 171151078Speter{ 171251078Speter struct com_s *com; 171351078Speter 171451078Speter com = (struct com_s *)chan; 171551078Speter com->state &= ~CS_DTR_OFF; 171651078Speter wakeup(&com->dtr_wait); 171751078Speter} 171851078Speter 171951078Speterstatic void 172051078Spetersioinput(com) 172151078Speter struct com_s *com; 172251078Speter{ 172351078Speter u_char *buf; 172451078Speter int incc; 172551078Speter u_char line_status; 172651078Speter int recv_data; 172751078Speter struct tty *tp; 172851078Speter 172951078Speter buf = com->ibuf; 173051078Speter tp = com->tp; 173151078Speter if (!(tp->t_state & TS_ISOPEN) || !(tp->t_cflag & CREAD)) { 173251078Speter com_events -= (com->iptr - com->ibuf); 173351078Speter com->iptr = com->ibuf; 173451078Speter return; 173551078Speter } 173651078Speter if (tp->t_state & TS_CAN_BYPASS_L_RINT) { 173751078Speter /* 173851078Speter * Avoid the grotesquely inefficient lineswitch routine 173951078Speter * (ttyinput) in "raw" mode. It usually takes about 450 174051078Speter * instructions (that's without canonical processing or echo!). 174151078Speter * slinput is reasonably fast (usually 40 instructions plus 174251078Speter * call overhead). 174351078Speter */ 174451078Speter do { 174551078Speter enable_intr(); 174651078Speter incc = com->iptr - buf; 174751078Speter if (tp->t_rawq.c_cc + incc > tp->t_ihiwat 174851078Speter && (com->state & CS_RTS_IFLOW 174951078Speter || tp->t_iflag & IXOFF) 175051078Speter && !(tp->t_state & TS_TBLOCK)) 175151078Speter ttyblock(tp); 175251078Speter com->delta_error_counts[CE_TTY_BUF_OVERFLOW] 175351078Speter += b_to_q((char *)buf, incc, &tp->t_rawq); 175451078Speter buf += incc; 175551078Speter tk_nin += incc; 175651078Speter tk_rawcc += incc; 175751078Speter tp->t_rawcc += incc; 175851078Speter ttwakeup(tp); 175951078Speter if (tp->t_state & TS_TTSTOP 176051078Speter && (tp->t_iflag & IXANY 176151078Speter || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) { 176251078Speter tp->t_state &= ~TS_TTSTOP; 176351078Speter tp->t_lflag &= ~FLUSHO; 176451078Speter comstart(tp); 176551078Speter } 176651078Speter disable_intr(); 176751078Speter } while (buf < com->iptr); 176851078Speter } else { 176951078Speter do { 177051078Speter enable_intr(); 177151078Speter line_status = buf[com->ierroff]; 177251078Speter recv_data = *buf++; 177351078Speter if (line_status 177451078Speter & (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) { 177551078Speter if (line_status & LSR_BI) 177651078Speter recv_data |= TTY_BI; 177751078Speter if (line_status & LSR_FE) 177851078Speter recv_data |= TTY_FE; 177951078Speter if (line_status & LSR_OE) 178051078Speter recv_data |= TTY_OE; 178151078Speter if (line_status & LSR_PE) 178251078Speter recv_data |= TTY_PE; 178351078Speter } 178451078Speter (*linesw[tp->t_line].l_rint)(recv_data, tp); 178551078Speter disable_intr(); 178651078Speter } while (buf < com->iptr); 178751078Speter } 178851078Speter com_events -= (com->iptr - com->ibuf); 178951078Speter com->iptr = com->ibuf; 179051078Speter 179151078Speter /* 179251078Speter * There is now room for another low-level buffer full of input, 179351078Speter * so enable RTS if it is now disabled and there is room in the 179451078Speter * high-level buffer. 179551078Speter */ 179651078Speter if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & MCR_RTS) && 179751078Speter !(tp->t_state & TS_TBLOCK)) 179851078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 179951078Speter} 180051078Speter 180151078Spetervoid 180251078Spetersiointr(arg) 180351078Speter void *arg; 180451078Speter{ 180551078Speter#ifndef COM_MULTIPORT 180651078Speter COM_LOCK(); 180751078Speter siointr1((struct com_s *) arg); 180851078Speter COM_UNLOCK(); 180951078Speter#else /* COM_MULTIPORT */ 181051078Speter bool_t possibly_more_intrs; 181151078Speter int unit; 181251078Speter struct com_s *com; 181351078Speter 181451078Speter /* 181551078Speter * Loop until there is no activity on any port. This is necessary 181651078Speter * to get an interrupt edge more than to avoid another interrupt. 181751078Speter * If the IRQ signal is just an OR of the IRQ signals from several 181851078Speter * devices, then the edge from one may be lost because another is 181951078Speter * on. 182051078Speter */ 182151078Speter COM_LOCK(); 182251078Speter do { 182351078Speter possibly_more_intrs = FALSE; 182453344Speter for (unit = 0; unit < sio_numunits; ++unit) { 182551078Speter com = com_addr(unit); 182651078Speter /* 182751078Speter * XXX COM_LOCK(); 182851078Speter * would it work here, or be counter-productive? 182951078Speter */ 183051078Speter if (com != NULL 183151078Speter && !com->gone 183251078Speter && (inb(com->int_id_port) & IIR_IMASK) 183351078Speter != IIR_NOPEND) { 183451078Speter siointr1(com); 183551078Speter possibly_more_intrs = TRUE; 183651078Speter } 183751078Speter /* XXX COM_UNLOCK(); */ 183851078Speter } 183951078Speter } while (possibly_more_intrs); 184051078Speter COM_UNLOCK(); 184151078Speter#endif /* COM_MULTIPORT */ 184251078Speter} 184351078Speter 184451078Speterstatic void 184551078Spetersiointr1(com) 184651078Speter struct com_s *com; 184751078Speter{ 184851078Speter u_char line_status; 184951078Speter u_char modem_status; 185051078Speter u_char *ioptr; 185151078Speter u_char recv_data; 185251078Speter u_char int_ctl; 185351078Speter u_char int_ctl_new; 185451078Speter struct timecounter *tc; 185551078Speter u_int count; 185651078Speter 185751078Speter int_ctl = inb(com->intr_ctl_port); 185851078Speter int_ctl_new = int_ctl; 185951078Speter 186051078Speter while (!com->gone) { 186151078Speter if (com->pps.ppsparam.mode & PPS_CAPTUREBOTH) { 186251078Speter modem_status = inb(com->modem_status_port); 186351078Speter if ((modem_status ^ com->last_modem_status) & MSR_DCD) { 186451078Speter tc = timecounter; 186551078Speter count = tc->tc_get_timecount(tc); 186651078Speter pps_event(&com->pps, tc, count, 186751078Speter (modem_status & MSR_DCD) ? 186851078Speter PPS_CAPTUREASSERT : PPS_CAPTURECLEAR); 186951078Speter } 187051078Speter } 187151078Speter line_status = inb(com->line_status_port); 187251078Speter 187351078Speter /* input event? (check first to help avoid overruns) */ 187451078Speter while (line_status & LSR_RCV_MASK) { 187551078Speter /* break/unnattached error bits or real input? */ 187651078Speter if (!(line_status & LSR_RXRDY)) 187751078Speter recv_data = 0; 187851078Speter else 187951078Speter recv_data = inb(com->data_port); 188061649Sps#if defined(DDB) && defined(ALT_BREAK_TO_DEBUGGER) 188161649Sps /* 188261649Sps * Solaris implements a new BREAK which is initiated 188361649Sps * by a character sequence CR ~ ^b which is similar 188461649Sps * to a familiar pattern used on Sun servers by the 188561649Sps * Remote Console. 188661649Sps */ 188761649Sps#define KEY_CRTLB 2 /* ^B */ 188861649Sps#define KEY_CR 13 /* CR '\r' */ 188961649Sps#define KEY_TILDE 126 /* ~ */ 189061649Sps 189161649Sps if (com->unit == comconsole) { 189261649Sps static int brk_state1 = 0, brk_state2 = 0; 189361649Sps if (recv_data == KEY_CR) { 189461649Sps brk_state1 = recv_data; 189561649Sps brk_state2 = 0; 189661649Sps } else if (brk_state1 == KEY_CR && (recv_data == KEY_TILDE || recv_data == KEY_CRTLB)) { 189761649Sps if (recv_data == KEY_TILDE) 189861649Sps brk_state2 = recv_data; 189961649Sps else if (brk_state2 == KEY_TILDE && recv_data == KEY_CRTLB) { 190061649Sps breakpoint(); 190161649Sps brk_state1 = brk_state2 = 0; 190261649Sps goto cont; 190361649Sps } else 190461649Sps brk_state2 = 0; 190561649Sps } else 190661649Sps brk_state1 = 0; 190761649Sps } 190861649Sps#endif 190951078Speter if (line_status & (LSR_BI | LSR_FE | LSR_PE)) { 191051078Speter /* 191151078Speter * Don't store BI if IGNBRK or FE/PE if IGNPAR. 191251078Speter * Otherwise, push the work to a higher level 191351078Speter * (to handle PARMRK) if we're bypassing. 191451078Speter * Otherwise, convert BI/FE and PE+INPCK to 0. 191551078Speter * 191651078Speter * This makes bypassing work right in the 191751078Speter * usual "raw" case (IGNBRK set, and IGNPAR 191851078Speter * and INPCK clear). 191951078Speter * 192051078Speter * Note: BI together with FE/PE means just BI. 192151078Speter */ 192251078Speter if (line_status & LSR_BI) { 192351078Speter#if defined(DDB) && defined(BREAK_TO_DEBUGGER) 192451078Speter if (com->unit == comconsole) { 192551078Speter breakpoint(); 192651078Speter goto cont; 192751078Speter } 192851078Speter#endif 192951078Speter if (com->tp == NULL 193051078Speter || com->tp->t_iflag & IGNBRK) 193151078Speter goto cont; 193251078Speter } else { 193351078Speter if (com->tp == NULL 193451078Speter || com->tp->t_iflag & IGNPAR) 193551078Speter goto cont; 193651078Speter } 193751078Speter if (com->tp->t_state & TS_CAN_BYPASS_L_RINT 193851078Speter && (line_status & (LSR_BI | LSR_FE) 193951078Speter || com->tp->t_iflag & INPCK)) 194051078Speter recv_data = 0; 194151078Speter } 194251078Speter ++com->bytes_in; 194351078Speter if (com->hotchar != 0 && recv_data == com->hotchar) 194451078Speter setsofttty(); 194551078Speter ioptr = com->iptr; 194651078Speter if (ioptr >= com->ibufend) 194751078Speter CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW); 194851078Speter else { 194951078Speter if (com->do_timestamp) 195051078Speter microtime(&com->timestamp); 195151078Speter ++com_events; 195251078Speter schedsofttty(); 195351078Speter#if 0 /* for testing input latency vs efficiency */ 195451078Speterif (com->iptr - com->ibuf == 8) 195551078Speter setsofttty(); 195651078Speter#endif 195751078Speter ioptr[0] = recv_data; 195851078Speter ioptr[com->ierroff] = line_status; 195951078Speter com->iptr = ++ioptr; 196051078Speter if (ioptr == com->ihighwater 196151078Speter && com->state & CS_RTS_IFLOW) 196251078Speter outb(com->modem_ctl_port, 196351078Speter com->mcr_image &= ~MCR_RTS); 196451078Speter if (line_status & LSR_OE) 196551078Speter CE_RECORD(com, CE_OVERRUN); 196651078Speter } 196751078Spetercont: 196851078Speter /* 196951078Speter * "& 0x7F" is to avoid the gcc-1.40 generating a slow 197051078Speter * jump from the top of the loop to here 197151078Speter */ 197251078Speter line_status = inb(com->line_status_port) & 0x7F; 197351078Speter } 197451078Speter 197551078Speter /* modem status change? (always check before doing output) */ 197651078Speter modem_status = inb(com->modem_status_port); 197751078Speter if (modem_status != com->last_modem_status) { 197851078Speter if (com->do_dcd_timestamp 197951078Speter && !(com->last_modem_status & MSR_DCD) 198051078Speter && modem_status & MSR_DCD) 198151078Speter microtime(&com->dcd_timestamp); 198251078Speter 198351078Speter /* 198451078Speter * Schedule high level to handle DCD changes. Note 198551078Speter * that we don't use the delta bits anywhere. Some 198651078Speter * UARTs mess them up, and it's easy to remember the 198751078Speter * previous bits and calculate the delta. 198851078Speter */ 198951078Speter com->last_modem_status = modem_status; 199051078Speter if (!(com->state & CS_CHECKMSR)) { 199151078Speter com_events += LOTS_OF_EVENTS; 199251078Speter com->state |= CS_CHECKMSR; 199351078Speter setsofttty(); 199451078Speter } 199551078Speter 199651078Speter /* handle CTS change immediately for crisp flow ctl */ 199751078Speter if (com->state & CS_CTS_OFLOW) { 199851078Speter if (modem_status & MSR_CTS) 199951078Speter com->state |= CS_ODEVREADY; 200051078Speter else 200151078Speter com->state &= ~CS_ODEVREADY; 200251078Speter } 200351078Speter } 200451078Speter 200551078Speter /* output queued and everything ready? */ 200651078Speter if (line_status & LSR_TXRDY 200751078Speter && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { 200851078Speter ioptr = com->obufq.l_head; 200951078Speter if (com->tx_fifo_size > 1) { 201051078Speter u_int ocount; 201151078Speter 201251078Speter ocount = com->obufq.l_tail - ioptr; 201351078Speter if (ocount > com->tx_fifo_size) 201451078Speter ocount = com->tx_fifo_size; 201551078Speter com->bytes_out += ocount; 201651078Speter do 201751078Speter outb(com->data_port, *ioptr++); 201851078Speter while (--ocount != 0); 201951078Speter } else { 202051078Speter outb(com->data_port, *ioptr++); 202151078Speter ++com->bytes_out; 202251078Speter } 202351078Speter com->obufq.l_head = ioptr; 202451078Speter if (COM_IIR_TXRDYBUG(com->flags)) { 202551078Speter int_ctl_new = int_ctl | IER_ETXRDY; 202651078Speter } 202751078Speter if (ioptr >= com->obufq.l_tail) { 202851078Speter struct lbq *qp; 202951078Speter 203051078Speter qp = com->obufq.l_next; 203151078Speter qp->l_queued = FALSE; 203251078Speter qp = qp->l_next; 203351078Speter if (qp != NULL) { 203451078Speter com->obufq.l_head = qp->l_head; 203551078Speter com->obufq.l_tail = qp->l_tail; 203651078Speter com->obufq.l_next = qp; 203751078Speter } else { 203851078Speter /* output just completed */ 203953344Speter if (COM_IIR_TXRDYBUG(com->flags)) { 204051078Speter int_ctl_new = int_ctl & ~IER_ETXRDY; 204151078Speter } 204251078Speter com->state &= ~CS_BUSY; 204351078Speter } 204451078Speter if (!(com->state & CS_ODONE)) { 204551078Speter com_events += LOTS_OF_EVENTS; 204651078Speter com->state |= CS_ODONE; 204751078Speter setsofttty(); /* handle at high level ASAP */ 204851078Speter } 204951078Speter } 205053344Speter if (COM_IIR_TXRDYBUG(com->flags) && (int_ctl != int_ctl_new)) { 205151078Speter outb(com->intr_ctl_port, int_ctl_new); 205251078Speter } 205351078Speter } 205451078Speter 205551078Speter /* finished? */ 205651078Speter#ifndef COM_MULTIPORT 205751078Speter if ((inb(com->int_id_port) & IIR_IMASK) == IIR_NOPEND) 205851078Speter#endif /* COM_MULTIPORT */ 205951078Speter return; 206051078Speter } 206151078Speter} 206251078Speter 206351078Speterstatic int 206451078Spetersioioctl(dev, cmd, data, flag, p) 206551078Speter dev_t dev; 206651078Speter u_long cmd; 206751078Speter caddr_t data; 206851078Speter int flag; 206951078Speter struct proc *p; 207051078Speter{ 207151078Speter struct com_s *com; 207251078Speter int error; 207351078Speter int mynor; 207451078Speter int s; 207551078Speter struct tty *tp; 207651078Speter#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 207751078Speter u_long oldcmd; 207851078Speter struct termios term; 207951078Speter#endif 208051078Speter 208151078Speter mynor = minor(dev); 208251078Speter com = com_addr(MINOR_TO_UNIT(mynor)); 208357915Simp if (com == NULL || com->gone) 208451078Speter return (ENODEV); 208551078Speter if (mynor & CONTROL_MASK) { 208651078Speter struct termios *ct; 208751078Speter 208851078Speter switch (mynor & CONTROL_MASK) { 208951078Speter case CONTROL_INIT_STATE: 209051078Speter ct = mynor & CALLOUT_MASK ? &com->it_out : &com->it_in; 209151078Speter break; 209251078Speter case CONTROL_LOCK_STATE: 209351078Speter ct = mynor & CALLOUT_MASK ? &com->lt_out : &com->lt_in; 209451078Speter break; 209551078Speter default: 209651078Speter return (ENODEV); /* /dev/nodev */ 209751078Speter } 209851078Speter switch (cmd) { 209951078Speter case TIOCSETA: 210051078Speter error = suser(p); 210151078Speter if (error != 0) 210251078Speter return (error); 210351078Speter *ct = *(struct termios *)data; 210451078Speter return (0); 210551078Speter case TIOCGETA: 210651078Speter *(struct termios *)data = *ct; 210751078Speter return (0); 210851078Speter case TIOCGETD: 210951078Speter *(int *)data = TTYDISC; 211051078Speter return (0); 211151078Speter case TIOCGWINSZ: 211251078Speter bzero(data, sizeof(struct winsize)); 211351078Speter return (0); 211451078Speter default: 211551078Speter return (ENOTTY); 211651078Speter } 211751078Speter } 211851078Speter tp = com->tp; 211951078Speter#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 212051078Speter term = tp->t_termios; 212151078Speter oldcmd = cmd; 212251078Speter error = ttsetcompat(tp, &cmd, data, &term); 212351078Speter if (error != 0) 212451078Speter return (error); 212551078Speter if (cmd != oldcmd) 212651078Speter data = (caddr_t)&term; 212751078Speter#endif 212851078Speter if (cmd == TIOCSETA || cmd == TIOCSETAW || cmd == TIOCSETAF) { 212951078Speter int cc; 213051078Speter struct termios *dt = (struct termios *)data; 213151078Speter struct termios *lt = mynor & CALLOUT_MASK 213251078Speter ? &com->lt_out : &com->lt_in; 213351078Speter 213451078Speter dt->c_iflag = (tp->t_iflag & lt->c_iflag) 213551078Speter | (dt->c_iflag & ~lt->c_iflag); 213651078Speter dt->c_oflag = (tp->t_oflag & lt->c_oflag) 213751078Speter | (dt->c_oflag & ~lt->c_oflag); 213851078Speter dt->c_cflag = (tp->t_cflag & lt->c_cflag) 213951078Speter | (dt->c_cflag & ~lt->c_cflag); 214051078Speter dt->c_lflag = (tp->t_lflag & lt->c_lflag) 214151078Speter | (dt->c_lflag & ~lt->c_lflag); 214251078Speter for (cc = 0; cc < NCCS; ++cc) 214351078Speter if (lt->c_cc[cc] != 0) 214451078Speter dt->c_cc[cc] = tp->t_cc[cc]; 214551078Speter if (lt->c_ispeed != 0) 214651078Speter dt->c_ispeed = tp->t_ispeed; 214751078Speter if (lt->c_ospeed != 0) 214851078Speter dt->c_ospeed = tp->t_ospeed; 214951078Speter } 215051078Speter error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); 215151078Speter if (error != ENOIOCTL) 215251078Speter return (error); 215351078Speter s = spltty(); 215451078Speter error = ttioctl(tp, cmd, data, flag); 215551078Speter disc_optim(tp, &tp->t_termios, com); 215651078Speter if (error != ENOIOCTL) { 215751078Speter splx(s); 215851078Speter return (error); 215951078Speter } 216051078Speter switch (cmd) { 216151078Speter case TIOCSBRK: 216260471Snyan sio_setreg(com, com_cfcr, com->cfcr_image |= CFCR_SBREAK); 216351078Speter break; 216451078Speter case TIOCCBRK: 216560471Snyan sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 216651078Speter break; 216751078Speter case TIOCSDTR: 216851078Speter (void)commctl(com, TIOCM_DTR, DMBIS); 216951078Speter break; 217051078Speter case TIOCCDTR: 217151078Speter (void)commctl(com, TIOCM_DTR, DMBIC); 217251078Speter break; 217351078Speter /* 217451078Speter * XXX should disallow changing MCR_RTS if CS_RTS_IFLOW is set. The 217551078Speter * changes get undone on the next call to comparam(). 217651078Speter */ 217751078Speter case TIOCMSET: 217851078Speter (void)commctl(com, *(int *)data, DMSET); 217951078Speter break; 218051078Speter case TIOCMBIS: 218151078Speter (void)commctl(com, *(int *)data, DMBIS); 218251078Speter break; 218351078Speter case TIOCMBIC: 218451078Speter (void)commctl(com, *(int *)data, DMBIC); 218551078Speter break; 218651078Speter case TIOCMGET: 218751078Speter *(int *)data = commctl(com, 0, DMGET); 218851078Speter break; 218951078Speter case TIOCMSDTRWAIT: 219051078Speter /* must be root since the wait applies to following logins */ 219151078Speter error = suser(p); 219251078Speter if (error != 0) { 219351078Speter splx(s); 219451078Speter return (error); 219551078Speter } 219651078Speter com->dtr_wait = *(int *)data * hz / 100; 219751078Speter break; 219851078Speter case TIOCMGDTRWAIT: 219951078Speter *(int *)data = com->dtr_wait * 100 / hz; 220051078Speter break; 220151078Speter case TIOCTIMESTAMP: 220251078Speter com->do_timestamp = TRUE; 220351078Speter *(struct timeval *)data = com->timestamp; 220451078Speter break; 220551078Speter case TIOCDCDTIMESTAMP: 220651078Speter com->do_dcd_timestamp = TRUE; 220751078Speter *(struct timeval *)data = com->dcd_timestamp; 220851078Speter break; 220951078Speter default: 221051078Speter splx(s); 221151078Speter error = pps_ioctl(cmd, data, &com->pps); 221251078Speter if (error == ENODEV) 221351078Speter error = ENOTTY; 221451078Speter return (error); 221551078Speter } 221651078Speter splx(s); 221751078Speter return (0); 221851078Speter} 221951078Speter 222051078Speterstatic void 222151078Spetersiopoll() 222251078Speter{ 222351078Speter int unit; 222451078Speter 222551078Speter if (com_events == 0) 222651078Speter return; 222751078Speterrepeat: 222853344Speter for (unit = 0; unit < sio_numunits; ++unit) { 222951078Speter struct com_s *com; 223051078Speter int incc; 223151078Speter struct tty *tp; 223251078Speter 223351078Speter com = com_addr(unit); 223451078Speter if (com == NULL) 223551078Speter continue; 223651078Speter tp = com->tp; 223751078Speter if (tp == NULL || com->gone) { 223851078Speter /* 223951078Speter * Discard any events related to never-opened or 224051078Speter * going-away devices. 224151078Speter */ 224251078Speter disable_intr(); 224351078Speter incc = com->iptr - com->ibuf; 224451078Speter com->iptr = com->ibuf; 224551078Speter if (com->state & CS_CHECKMSR) { 224651078Speter incc += LOTS_OF_EVENTS; 224751078Speter com->state &= ~CS_CHECKMSR; 224851078Speter } 224951078Speter com_events -= incc; 225051078Speter enable_intr(); 225151078Speter continue; 225251078Speter } 225351078Speter if (com->iptr != com->ibuf) { 225451078Speter disable_intr(); 225551078Speter sioinput(com); 225651078Speter enable_intr(); 225751078Speter } 225851078Speter if (com->state & CS_CHECKMSR) { 225951078Speter u_char delta_modem_status; 226051078Speter 226151078Speter disable_intr(); 226251078Speter delta_modem_status = com->last_modem_status 226351078Speter ^ com->prev_modem_status; 226451078Speter com->prev_modem_status = com->last_modem_status; 226551078Speter com_events -= LOTS_OF_EVENTS; 226651078Speter com->state &= ~CS_CHECKMSR; 226751078Speter enable_intr(); 226851078Speter if (delta_modem_status & MSR_DCD) 226951078Speter (*linesw[tp->t_line].l_modem) 227051078Speter (tp, com->prev_modem_status & MSR_DCD); 227151078Speter } 227251078Speter if (com->state & CS_ODONE) { 227351078Speter disable_intr(); 227451078Speter com_events -= LOTS_OF_EVENTS; 227551078Speter com->state &= ~CS_ODONE; 227651078Speter enable_intr(); 227751078Speter if (!(com->state & CS_BUSY) 227851078Speter && !(com->extra_state & CSE_BUSYCHECK)) { 227951078Speter timeout(siobusycheck, com, hz / 100); 228051078Speter com->extra_state |= CSE_BUSYCHECK; 228151078Speter } 228251078Speter (*linesw[tp->t_line].l_start)(tp); 228351078Speter } 228451078Speter if (com_events == 0) 228551078Speter break; 228651078Speter } 228751078Speter if (com_events >= LOTS_OF_EVENTS) 228851078Speter goto repeat; 228951078Speter} 229051078Speter 229151078Speterstatic int 229251078Spetercomparam(tp, t) 229351078Speter struct tty *tp; 229451078Speter struct termios *t; 229551078Speter{ 229651078Speter u_int cfcr; 229751078Speter int cflag; 229851078Speter struct com_s *com; 229951078Speter int divisor; 230051078Speter u_char dlbh; 230151078Speter u_char dlbl; 230251078Speter int s; 230351078Speter int unit; 230451078Speter 230551078Speter /* do historical conversions */ 230651078Speter if (t->c_ispeed == 0) 230751078Speter t->c_ispeed = t->c_ospeed; 230851078Speter 230951078Speter /* check requested parameters */ 231051078Speter divisor = ttspeedtab(t->c_ospeed, comspeedtab); 231151078Speter if (divisor < 0 || (divisor > 0 && t->c_ispeed != t->c_ospeed)) 231251078Speter return (EINVAL); 231351078Speter 231451078Speter /* parameters are OK, convert them to the com struct and the device */ 231551078Speter unit = DEV_TO_UNIT(tp->t_dev); 231651078Speter com = com_addr(unit); 231757915Simp if (com == NULL) 231857915Simp return (ENODEV); 231951078Speter s = spltty(); 232051078Speter if (divisor == 0) 232151078Speter (void)commctl(com, TIOCM_DTR, DMBIC); /* hang up line */ 232251078Speter else 232351078Speter (void)commctl(com, TIOCM_DTR, DMBIS); 232451078Speter cflag = t->c_cflag; 232551078Speter switch (cflag & CSIZE) { 232651078Speter case CS5: 232751078Speter cfcr = CFCR_5BITS; 232851078Speter break; 232951078Speter case CS6: 233051078Speter cfcr = CFCR_6BITS; 233151078Speter break; 233251078Speter case CS7: 233351078Speter cfcr = CFCR_7BITS; 233451078Speter break; 233551078Speter default: 233651078Speter cfcr = CFCR_8BITS; 233751078Speter break; 233851078Speter } 233951078Speter if (cflag & PARENB) { 234051078Speter cfcr |= CFCR_PENAB; 234151078Speter if (!(cflag & PARODD)) 234251078Speter cfcr |= CFCR_PEVEN; 234351078Speter } 234451078Speter if (cflag & CSTOPB) 234551078Speter cfcr |= CFCR_STOPB; 234651078Speter 234751078Speter if (com->hasfifo && divisor != 0) { 234851078Speter /* 234951078Speter * Use a fifo trigger level low enough so that the input 235051078Speter * latency from the fifo is less than about 16 msec and 235151078Speter * the total latency is less than about 30 msec. These 235251078Speter * latencies are reasonable for humans. Serial comms 235351078Speter * protocols shouldn't expect anything better since modem 235451078Speter * latencies are larger. 235551078Speter */ 235651078Speter com->fifo_image = t->c_ospeed <= 4800 235751078Speter ? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_HIGH; 235851078Speter#ifdef COM_ESP 235951078Speter /* 236051078Speter * The Hayes ESP card needs the fifo DMA mode bit set 236151078Speter * in compatibility mode. If not, it will interrupt 236251078Speter * for each character received. 236351078Speter */ 236451078Speter if (com->esp) 236551078Speter com->fifo_image |= FIFO_DMA_MODE; 236651078Speter#endif 236760471Snyan sio_setreg(com, com_fifo, com->fifo_image); 236851078Speter } 236951078Speter 237051078Speter /* 237151078Speter * This returns with interrupts disabled so that we can complete 237251078Speter * the speed change atomically. Keeping interrupts disabled is 237351078Speter * especially important while com_data is hidden. 237451078Speter */ 237551078Speter (void) siosetwater(com, t->c_ispeed); 237651078Speter 237751078Speter if (divisor != 0) { 237860471Snyan sio_setreg(com, com_cfcr, cfcr | CFCR_DLAB); 237951078Speter /* 238051078Speter * Only set the divisor registers if they would change, 238151078Speter * since on some 16550 incompatibles (UMC8669F), setting 238251078Speter * them while input is arriving them loses sync until 238351078Speter * data stops arriving. 238451078Speter */ 238551078Speter dlbl = divisor & 0xFF; 238660471Snyan if (sio_getreg(com, com_dlbl) != dlbl) 238760471Snyan sio_setreg(com, com_dlbl, dlbl); 238851078Speter dlbh = (u_int) divisor >> 8; 238960471Snyan if (sio_getreg(com, com_dlbh) != dlbh) 239060471Snyan sio_setreg(com, com_dlbh, dlbh); 239151078Speter } 239251078Speter 239360471Snyan sio_setreg(com, com_cfcr, com->cfcr_image = cfcr); 239451078Speter 239551078Speter if (!(tp->t_state & TS_TTSTOP)) 239651078Speter com->state |= CS_TTGO; 239751078Speter 239851078Speter if (cflag & CRTS_IFLOW) { 239951078Speter if (com->st16650a) { 240060471Snyan sio_setreg(com, com_cfcr, 0xbf); 240160471Snyan sio_setreg(com, com_fifo, 240260471Snyan sio_getreg(com, com_fifo) | 0x40); 240351078Speter } 240451078Speter com->state |= CS_RTS_IFLOW; 240551078Speter /* 240651078Speter * If CS_RTS_IFLOW just changed from off to on, the change 240751078Speter * needs to be propagated to MCR_RTS. This isn't urgent, 240851078Speter * so do it later by calling comstart() instead of repeating 240951078Speter * a lot of code from comstart() here. 241051078Speter */ 241151078Speter } else if (com->state & CS_RTS_IFLOW) { 241251078Speter com->state &= ~CS_RTS_IFLOW; 241351078Speter /* 241451078Speter * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS 241551078Speter * on here, since comstart() won't do it later. 241651078Speter */ 241751078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 241851078Speter if (com->st16650a) { 241960471Snyan sio_setreg(com, com_cfcr, 0xbf); 242060471Snyan sio_setreg(com, com_fifo, 242160471Snyan sio_getreg(com, com_fifo) & ~0x40); 242251078Speter } 242351078Speter } 242451078Speter 242551078Speter 242651078Speter /* 242751078Speter * Set up state to handle output flow control. 242851078Speter * XXX - worth handling MDMBUF (DCD) flow control at the lowest level? 242951078Speter * Now has 10+ msec latency, while CTS flow has 50- usec latency. 243051078Speter */ 243151078Speter com->state |= CS_ODEVREADY; 243251078Speter com->state &= ~CS_CTS_OFLOW; 243351078Speter if (cflag & CCTS_OFLOW) { 243451078Speter com->state |= CS_CTS_OFLOW; 243551078Speter if (!(com->last_modem_status & MSR_CTS)) 243651078Speter com->state &= ~CS_ODEVREADY; 243751078Speter if (com->st16650a) { 243860471Snyan sio_setreg(com, com_cfcr, 0xbf); 243960471Snyan sio_setreg(com, com_fifo, 244060471Snyan sio_getreg(com, com_fifo) | 0x80); 244151078Speter } 244251078Speter } else { 244351078Speter if (com->st16650a) { 244460471Snyan sio_setreg(com, com_cfcr, 0xbf); 244560471Snyan sio_setreg(com, com_fifo, 244660471Snyan sio_getreg(com, com_fifo) & ~0x80); 244751078Speter } 244851078Speter } 244951078Speter 245060471Snyan sio_setreg(com, com_cfcr, com->cfcr_image); 245151078Speter 245251078Speter /* XXX shouldn't call functions while intrs are disabled. */ 245351078Speter disc_optim(tp, t, com); 245451078Speter /* 245551078Speter * Recover from fiddling with CS_TTGO. We used to call siointr1() 245651078Speter * unconditionally, but that defeated the careful discarding of 245751078Speter * stale input in sioopen(). 245851078Speter */ 245951078Speter if (com->state >= (CS_BUSY | CS_TTGO)) 246051078Speter siointr1(com); 246151078Speter 246251078Speter enable_intr(); 246351078Speter splx(s); 246451078Speter comstart(tp); 246551078Speter if (com->ibufold != NULL) { 246651078Speter free(com->ibufold, M_DEVBUF); 246751078Speter com->ibufold = NULL; 246851078Speter } 246951078Speter return (0); 247051078Speter} 247151078Speter 247251078Speterstatic int 247351078Spetersiosetwater(com, speed) 247451078Speter struct com_s *com; 247551078Speter speed_t speed; 247651078Speter{ 247751078Speter int cp4ticks; 247851078Speter u_char *ibuf; 247951078Speter int ibufsize; 248051078Speter struct tty *tp; 248151078Speter 248251078Speter /* 248351078Speter * Make the buffer size large enough to handle a softtty interrupt 248451078Speter * latency of about 2 ticks without loss of throughput or data 248551078Speter * (about 3 ticks if input flow control is not used or not honoured, 248651078Speter * but a bit less for CS5-CS7 modes). 248751078Speter */ 248851078Speter cp4ticks = speed / 10 / hz * 4; 248951078Speter for (ibufsize = 128; ibufsize < cp4ticks;) 249051078Speter ibufsize <<= 1; 249151078Speter if (ibufsize == com->ibufsize) { 249251078Speter disable_intr(); 249351078Speter return (0); 249451078Speter } 249551078Speter 249651078Speter /* 249751078Speter * Allocate input buffer. The extra factor of 2 in the size is 249851078Speter * to allow for an error byte for each input byte. 249951078Speter */ 250051078Speter ibuf = malloc(2 * ibufsize, M_DEVBUF, M_NOWAIT); 250151078Speter if (ibuf == NULL) { 250251078Speter disable_intr(); 250351078Speter return (ENOMEM); 250451078Speter } 250551078Speter 250651078Speter /* Initialize non-critical variables. */ 250751078Speter com->ibufold = com->ibuf; 250851078Speter com->ibufsize = ibufsize; 250951078Speter tp = com->tp; 251051078Speter if (tp != NULL) { 251151078Speter tp->t_ififosize = 2 * ibufsize; 251251078Speter tp->t_ispeedwat = (speed_t)-1; 251351078Speter tp->t_ospeedwat = (speed_t)-1; 251451078Speter } 251551078Speter 251651078Speter /* 251751078Speter * Read current input buffer, if any. Continue with interrupts 251851078Speter * disabled. 251951078Speter */ 252051078Speter disable_intr(); 252151078Speter if (com->iptr != com->ibuf) 252251078Speter sioinput(com); 252351078Speter 252451078Speter /*- 252551078Speter * Initialize critical variables, including input buffer watermarks. 252651078Speter * The external device is asked to stop sending when the buffer 252751078Speter * exactly reaches high water, or when the high level requests it. 252851078Speter * The high level is notified immediately (rather than at a later 252951078Speter * clock tick) when this watermark is reached. 253051078Speter * The buffer size is chosen so the watermark should almost never 253151078Speter * be reached. 253251078Speter * The low watermark is invisibly 0 since the buffer is always 253351078Speter * emptied all at once. 253451078Speter */ 253551078Speter com->iptr = com->ibuf = ibuf; 253651078Speter com->ibufend = ibuf + ibufsize; 253751078Speter com->ierroff = ibufsize; 253851078Speter com->ihighwater = ibuf + 3 * ibufsize / 4; 253951078Speter return (0); 254051078Speter} 254151078Speter 254251078Speterstatic void 254351078Spetercomstart(tp) 254451078Speter struct tty *tp; 254551078Speter{ 254651078Speter struct com_s *com; 254751078Speter int s; 254851078Speter int unit; 254951078Speter 255051078Speter unit = DEV_TO_UNIT(tp->t_dev); 255151078Speter com = com_addr(unit); 255257915Simp if (com == NULL) 255357915Simp return; 255451078Speter s = spltty(); 255551078Speter disable_intr(); 255651078Speter if (tp->t_state & TS_TTSTOP) 255751078Speter com->state &= ~CS_TTGO; 255851078Speter else 255951078Speter com->state |= CS_TTGO; 256051078Speter if (tp->t_state & TS_TBLOCK) { 256151078Speter if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW) 256251078Speter outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); 256351078Speter } else { 256451078Speter if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater 256551078Speter && com->state & CS_RTS_IFLOW) 256651078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 256751078Speter } 256851078Speter enable_intr(); 256951078Speter if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { 257051078Speter ttwwakeup(tp); 257151078Speter splx(s); 257251078Speter return; 257351078Speter } 257451078Speter if (tp->t_outq.c_cc != 0) { 257551078Speter struct lbq *qp; 257651078Speter struct lbq *next; 257751078Speter 257851078Speter if (!com->obufs[0].l_queued) { 257951078Speter com->obufs[0].l_tail 258051078Speter = com->obuf1 + q_to_b(&tp->t_outq, com->obuf1, 258151078Speter sizeof com->obuf1); 258251078Speter com->obufs[0].l_next = NULL; 258351078Speter com->obufs[0].l_queued = TRUE; 258451078Speter disable_intr(); 258551078Speter if (com->state & CS_BUSY) { 258651078Speter qp = com->obufq.l_next; 258751078Speter while ((next = qp->l_next) != NULL) 258851078Speter qp = next; 258951078Speter qp->l_next = &com->obufs[0]; 259051078Speter } else { 259151078Speter com->obufq.l_head = com->obufs[0].l_head; 259251078Speter com->obufq.l_tail = com->obufs[0].l_tail; 259351078Speter com->obufq.l_next = &com->obufs[0]; 259451078Speter com->state |= CS_BUSY; 259551078Speter } 259651078Speter enable_intr(); 259751078Speter } 259851078Speter if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) { 259951078Speter com->obufs[1].l_tail 260051078Speter = com->obuf2 + q_to_b(&tp->t_outq, com->obuf2, 260151078Speter sizeof com->obuf2); 260251078Speter com->obufs[1].l_next = NULL; 260351078Speter com->obufs[1].l_queued = TRUE; 260451078Speter disable_intr(); 260551078Speter if (com->state & CS_BUSY) { 260651078Speter qp = com->obufq.l_next; 260751078Speter while ((next = qp->l_next) != NULL) 260851078Speter qp = next; 260951078Speter qp->l_next = &com->obufs[1]; 261051078Speter } else { 261151078Speter com->obufq.l_head = com->obufs[1].l_head; 261251078Speter com->obufq.l_tail = com->obufs[1].l_tail; 261351078Speter com->obufq.l_next = &com->obufs[1]; 261451078Speter com->state |= CS_BUSY; 261551078Speter } 261651078Speter enable_intr(); 261751078Speter } 261851078Speter tp->t_state |= TS_BUSY; 261951078Speter } 262051078Speter disable_intr(); 262151078Speter if (com->state >= (CS_BUSY | CS_TTGO)) 262251078Speter siointr1(com); /* fake interrupt to start output */ 262351078Speter enable_intr(); 262451078Speter ttwwakeup(tp); 262551078Speter splx(s); 262651078Speter} 262751078Speter 262851078Speterstatic void 262951654Sphkcomstop(tp, rw) 263051078Speter struct tty *tp; 263151078Speter int rw; 263251078Speter{ 263351078Speter struct com_s *com; 263451078Speter 263551078Speter com = com_addr(DEV_TO_UNIT(tp->t_dev)); 263657915Simp if (com == NULL || com->gone) 263751078Speter return; 263851078Speter disable_intr(); 263951078Speter if (rw & FWRITE) { 264051078Speter if (com->hasfifo) 264151078Speter#ifdef COM_ESP 264251078Speter /* XXX avoid h/w bug. */ 264351078Speter if (!com->esp) 264451078Speter#endif 264560471Snyan sio_setreg(com, com_fifo, 264660471Snyan FIFO_XMT_RST | com->fifo_image); 264751078Speter com->obufs[0].l_queued = FALSE; 264851078Speter com->obufs[1].l_queued = FALSE; 264951078Speter if (com->state & CS_ODONE) 265051078Speter com_events -= LOTS_OF_EVENTS; 265151078Speter com->state &= ~(CS_ODONE | CS_BUSY); 265251078Speter com->tp->t_state &= ~TS_BUSY; 265351078Speter } 265451078Speter if (rw & FREAD) { 265551078Speter if (com->hasfifo) 265651078Speter#ifdef COM_ESP 265751078Speter /* XXX avoid h/w bug. */ 265851078Speter if (!com->esp) 265951078Speter#endif 266060471Snyan sio_setreg(com, com_fifo, 266160471Snyan FIFO_RCV_RST | com->fifo_image); 266251078Speter com_events -= (com->iptr - com->ibuf); 266351078Speter com->iptr = com->ibuf; 266451078Speter } 266551078Speter enable_intr(); 266651078Speter comstart(tp); 266751078Speter} 266851078Speter 266951078Speterstatic int 267051078Spetercommctl(com, bits, how) 267151078Speter struct com_s *com; 267251078Speter int bits; 267351078Speter int how; 267451078Speter{ 267551078Speter int mcr; 267651078Speter int msr; 267751078Speter 267851078Speter if (how == DMGET) { 267951078Speter bits = TIOCM_LE; /* XXX - always enabled while open */ 268051078Speter mcr = com->mcr_image; 268151078Speter if (mcr & MCR_DTR) 268251078Speter bits |= TIOCM_DTR; 268351078Speter if (mcr & MCR_RTS) 268451078Speter bits |= TIOCM_RTS; 268551078Speter msr = com->prev_modem_status; 268651078Speter if (msr & MSR_CTS) 268751078Speter bits |= TIOCM_CTS; 268851078Speter if (msr & MSR_DCD) 268951078Speter bits |= TIOCM_CD; 269051078Speter if (msr & MSR_DSR) 269151078Speter bits |= TIOCM_DSR; 269251078Speter /* 269351078Speter * XXX - MSR_RI is naturally volatile, and we make MSR_TERI 269451078Speter * more volatile by reading the modem status a lot. Perhaps 269551078Speter * we should latch both bits until the status is read here. 269651078Speter */ 269751078Speter if (msr & (MSR_RI | MSR_TERI)) 269851078Speter bits |= TIOCM_RI; 269951078Speter return (bits); 270051078Speter } 270151078Speter mcr = 0; 270251078Speter if (bits & TIOCM_DTR) 270351078Speter mcr |= MCR_DTR; 270451078Speter if (bits & TIOCM_RTS) 270551078Speter mcr |= MCR_RTS; 270651078Speter if (com->gone) 270751078Speter return(0); 270851078Speter disable_intr(); 270951078Speter switch (how) { 271051078Speter case DMSET: 271151078Speter outb(com->modem_ctl_port, 271251078Speter com->mcr_image = mcr | (com->mcr_image & MCR_IENABLE)); 271351078Speter break; 271451078Speter case DMBIS: 271551078Speter outb(com->modem_ctl_port, com->mcr_image |= mcr); 271651078Speter break; 271751078Speter case DMBIC: 271851078Speter outb(com->modem_ctl_port, com->mcr_image &= ~mcr); 271951078Speter break; 272051078Speter } 272151078Speter enable_intr(); 272251078Speter return (0); 272351078Speter} 272451078Speter 272551078Speterstatic void 272651078Spetersiosettimeout() 272751078Speter{ 272851078Speter struct com_s *com; 272951078Speter bool_t someopen; 273051078Speter int unit; 273151078Speter 273251078Speter /* 273351078Speter * Set our timeout period to 1 second if no polled devices are open. 273451078Speter * Otherwise set it to max(1/200, 1/hz). 273551078Speter * Enable timeouts iff some device is open. 273651078Speter */ 273751078Speter untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 273851078Speter sio_timeout = hz; 273951078Speter someopen = FALSE; 274053344Speter for (unit = 0; unit < sio_numunits; ++unit) { 274151078Speter com = com_addr(unit); 274251078Speter if (com != NULL && com->tp != NULL 274351078Speter && com->tp->t_state & TS_ISOPEN && !com->gone) { 274451078Speter someopen = TRUE; 274551078Speter if (com->poll || com->poll_output) { 274651078Speter sio_timeout = hz > 200 ? hz / 200 : 1; 274751078Speter break; 274851078Speter } 274951078Speter } 275051078Speter } 275151078Speter if (someopen) { 275251078Speter sio_timeouts_until_log = hz / sio_timeout; 275351078Speter sio_timeout_handle = timeout(comwakeup, (void *)NULL, 275451078Speter sio_timeout); 275551078Speter } else { 275651078Speter /* Flush error messages, if any. */ 275751078Speter sio_timeouts_until_log = 1; 275851078Speter comwakeup((void *)NULL); 275951078Speter untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 276051078Speter } 276151078Speter} 276251078Speter 276351078Speterstatic void 276451078Spetercomwakeup(chan) 276551078Speter void *chan; 276651078Speter{ 276751078Speter struct com_s *com; 276851078Speter int unit; 276951078Speter 277051078Speter sio_timeout_handle = timeout(comwakeup, (void *)NULL, sio_timeout); 277151078Speter 277251078Speter /* 277351078Speter * Recover from lost output interrupts. 277451078Speter * Poll any lines that don't use interrupts. 277551078Speter */ 277653344Speter for (unit = 0; unit < sio_numunits; ++unit) { 277751078Speter com = com_addr(unit); 277851078Speter if (com != NULL && !com->gone 277951078Speter && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) { 278051078Speter disable_intr(); 278151078Speter siointr1(com); 278251078Speter enable_intr(); 278351078Speter } 278451078Speter } 278551078Speter 278651078Speter /* 278751078Speter * Check for and log errors, but not too often. 278851078Speter */ 278951078Speter if (--sio_timeouts_until_log > 0) 279051078Speter return; 279151078Speter sio_timeouts_until_log = hz / sio_timeout; 279253344Speter for (unit = 0; unit < sio_numunits; ++unit) { 279351078Speter int errnum; 279451078Speter 279551078Speter com = com_addr(unit); 279651078Speter if (com == NULL) 279751078Speter continue; 279851078Speter if (com->gone) 279951078Speter continue; 280051078Speter for (errnum = 0; errnum < CE_NTYPES; ++errnum) { 280151078Speter u_int delta; 280251078Speter u_long total; 280351078Speter 280451078Speter disable_intr(); 280551078Speter delta = com->delta_error_counts[errnum]; 280651078Speter com->delta_error_counts[errnum] = 0; 280751078Speter enable_intr(); 280851078Speter if (delta == 0) 280951078Speter continue; 281051078Speter total = com->error_counts[errnum] += delta; 281151078Speter log(LOG_ERR, "sio%d: %u more %s%s (total %lu)\n", 281251078Speter unit, delta, error_desc[errnum], 281351078Speter delta == 1 ? "" : "s", total); 281451078Speter } 281551078Speter } 281651078Speter} 281751078Speter 281851078Speterstatic void 281951078Speterdisc_optim(tp, t, com) 282051078Speter struct tty *tp; 282151078Speter struct termios *t; 282251078Speter struct com_s *com; 282351078Speter{ 282451078Speter if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON)) 282551078Speter && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK)) 282651078Speter && (!(t->c_iflag & PARMRK) 282751078Speter || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK)) 282851078Speter && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN)) 282951078Speter && linesw[tp->t_line].l_rint == ttyinput) 283051078Speter tp->t_state |= TS_CAN_BYPASS_L_RINT; 283151078Speter else 283251078Speter tp->t_state &= ~TS_CAN_BYPASS_L_RINT; 283351078Speter com->hotchar = linesw[tp->t_line].l_hotchar; 283451078Speter} 283551078Speter 283651078Speter/* 283751078Speter * Following are all routines needed for SIO to act as console 283851078Speter */ 283951078Speter#include <sys/cons.h> 284051078Speter 284151078Speterstruct siocnstate { 284251078Speter u_char dlbl; 284351078Speter u_char dlbh; 284451078Speter u_char ier; 284551078Speter u_char cfcr; 284651078Speter u_char mcr; 284751078Speter}; 284851078Speter 284951078Speterstatic speed_t siocngetspeed __P((Port_t, struct speedtab *)); 285051078Speterstatic void siocnclose __P((struct siocnstate *sp, Port_t iobase)); 285151078Speterstatic void siocnopen __P((struct siocnstate *sp, Port_t iobase, int speed)); 285251078Speterstatic void siocntxwait __P((Port_t iobase)); 285351078Speter 285451078Speterstatic cn_probe_t siocnprobe; 285551078Speterstatic cn_init_t siocninit; 285651078Speterstatic cn_checkc_t siocncheckc; 285751078Speterstatic cn_getc_t siocngetc; 285851078Speterstatic cn_putc_t siocnputc; 285951078Speter 286051078Speter#ifdef __i386__ 286155823SyokotaCONS_DRIVER(sio, siocnprobe, siocninit, NULL, siocngetc, siocncheckc, 286255823Syokota siocnputc, NULL); 286351078Speter#endif 286451078Speter 286551078Speter/* To get the GDB related variables */ 286651078Speter#if DDB > 0 286751078Speter#include <ddb/ddb.h> 286851078Speter#endif 286951078Speter 287051078Speterstatic void 287151078Spetersiocntxwait(iobase) 287251078Speter Port_t iobase; 287351078Speter{ 287451078Speter int timo; 287551078Speter 287651078Speter /* 287751078Speter * Wait for any pending transmission to finish. Required to avoid 287851078Speter * the UART lockup bug when the speed is changed, and for normal 287951078Speter * transmits. 288051078Speter */ 288151078Speter timo = 100000; 288251078Speter while ((inb(iobase + com_lsr) & (LSR_TSRE | LSR_TXRDY)) 288351078Speter != (LSR_TSRE | LSR_TXRDY) && --timo != 0) 288451078Speter ; 288551078Speter} 288651078Speter 288751078Speter/* 288851078Speter * Read the serial port specified and try to figure out what speed 288951078Speter * it's currently running at. We're assuming the serial port has 289051078Speter * been initialized and is basicly idle. This routine is only intended 289151078Speter * to be run at system startup. 289251078Speter * 289351078Speter * If the value read from the serial port doesn't make sense, return 0. 289451078Speter */ 289551078Speter 289651078Speterstatic speed_t 289751078Spetersiocngetspeed(iobase, table) 289851078Speter Port_t iobase; 289951078Speter struct speedtab *table; 290051078Speter{ 290151078Speter int code; 290251078Speter u_char dlbh; 290351078Speter u_char dlbl; 290451078Speter u_char cfcr; 290551078Speter 290651078Speter cfcr = inb(iobase + com_cfcr); 290751078Speter outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 290851078Speter 290951078Speter dlbl = inb(iobase + com_dlbl); 291051078Speter dlbh = inb(iobase + com_dlbh); 291151078Speter 291251078Speter outb(iobase + com_cfcr, cfcr); 291351078Speter 291451078Speter code = dlbh << 8 | dlbl; 291551078Speter 291653344Speter for (; table->sp_speed != -1; table++) 291751078Speter if (table->sp_code == code) 291851078Speter return (table->sp_speed); 291951078Speter 292058885Simp return (0); /* didn't match anything sane */ 292151078Speter} 292251078Speter 292351078Speterstatic void 292451078Spetersiocnopen(sp, iobase, speed) 292551078Speter struct siocnstate *sp; 292651078Speter Port_t iobase; 292751078Speter int speed; 292851078Speter{ 292951078Speter int divisor; 293051078Speter u_char dlbh; 293151078Speter u_char dlbl; 293251078Speter 293351078Speter /* 293451078Speter * Save all the device control registers except the fifo register 293551078Speter * and set our default ones (cs8 -parenb speed=comdefaultrate). 293651078Speter * We can't save the fifo register since it is read-only. 293751078Speter */ 293851078Speter sp->ier = inb(iobase + com_ier); 293951078Speter outb(iobase + com_ier, 0); /* spltty() doesn't stop siointr() */ 294051078Speter siocntxwait(iobase); 294151078Speter sp->cfcr = inb(iobase + com_cfcr); 294251078Speter outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 294351078Speter sp->dlbl = inb(iobase + com_dlbl); 294451078Speter sp->dlbh = inb(iobase + com_dlbh); 294551078Speter /* 294651078Speter * Only set the divisor registers if they would change, since on 294751078Speter * some 16550 incompatibles (Startech), setting them clears the 294851078Speter * data input register. This also reduces the effects of the 294951078Speter * UMC8669F bug. 295051078Speter */ 295151078Speter divisor = ttspeedtab(speed, comspeedtab); 295251078Speter dlbl = divisor & 0xFF; 295351078Speter if (sp->dlbl != dlbl) 295451078Speter outb(iobase + com_dlbl, dlbl); 295551078Speter dlbh = (u_int) divisor >> 8; 295651078Speter if (sp->dlbh != dlbh) 295751078Speter outb(iobase + com_dlbh, dlbh); 295851078Speter outb(iobase + com_cfcr, CFCR_8BITS); 295951078Speter sp->mcr = inb(iobase + com_mcr); 296051078Speter /* 296151078Speter * We don't want interrupts, but must be careful not to "disable" 296251078Speter * them by clearing the MCR_IENABLE bit, since that might cause 296351078Speter * an interrupt by floating the IRQ line. 296451078Speter */ 296551078Speter outb(iobase + com_mcr, (sp->mcr & MCR_IENABLE) | MCR_DTR | MCR_RTS); 296651078Speter} 296751078Speter 296851078Speterstatic void 296951078Spetersiocnclose(sp, iobase) 297051078Speter struct siocnstate *sp; 297151078Speter Port_t iobase; 297251078Speter{ 297351078Speter /* 297451078Speter * Restore the device control registers. 297551078Speter */ 297651078Speter siocntxwait(iobase); 297751078Speter outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 297851078Speter if (sp->dlbl != inb(iobase + com_dlbl)) 297951078Speter outb(iobase + com_dlbl, sp->dlbl); 298051078Speter if (sp->dlbh != inb(iobase + com_dlbh)) 298151078Speter outb(iobase + com_dlbh, sp->dlbh); 298251078Speter outb(iobase + com_cfcr, sp->cfcr); 298351078Speter /* 298451078Speter * XXX damp oscillations of MCR_DTR and MCR_RTS by not restoring them. 298551078Speter */ 298651078Speter outb(iobase + com_mcr, sp->mcr | MCR_DTR | MCR_RTS); 298751078Speter outb(iobase + com_ier, sp->ier); 298851078Speter} 298951078Speter 299051078Speterstatic void 299151078Spetersiocnprobe(cp) 299251078Speter struct consdev *cp; 299351078Speter{ 299451078Speter speed_t boot_speed; 299551078Speter u_char cfcr; 299651078Speter int s, unit; 299751078Speter struct siocnstate sp; 299851078Speter 299951078Speter /* 300051078Speter * Find our first enabled console, if any. If it is a high-level 300151078Speter * console device, then initialize it and return successfully. 300251078Speter * If it is a low-level console device, then initialize it and 300351078Speter * return unsuccessfully. It must be initialized in both cases 300451078Speter * for early use by console drivers and debuggers. Initializing 300551078Speter * the hardware is not necessary in all cases, since the i/o 300651078Speter * routines initialize it on the fly, but it is necessary if 300751078Speter * input might arrive while the hardware is switched back to an 300851078Speter * uninitialized state. We can't handle multiple console devices 300951078Speter * yet because our low-level routines don't take a device arg. 301051078Speter * We trust the user to set the console flags properly so that we 301151078Speter * don't need to probe. 301251078Speter */ 301351078Speter cp->cn_pri = CN_DEAD; 301451078Speter 301551078Speter for (unit = 0; unit < 16; unit++) { /* XXX need to know how many */ 301651078Speter int flags; 301751078Speter int disabled; 301851078Speter if (resource_int_value("sio", unit, "disabled", &disabled) == 0) { 301951078Speter if (disabled) 302051078Speter continue; 302151078Speter } 302251078Speter if (resource_int_value("sio", unit, "flags", &flags)) 302351078Speter continue; 302451078Speter if (COM_CONSOLE(flags) || COM_DEBUGGER(flags)) { 302551078Speter int port; 302651078Speter Port_t iobase; 302751078Speter 302851078Speter if (resource_int_value("sio", unit, "port", &port)) 302951078Speter continue; 303051078Speter iobase = port; 303151078Speter s = spltty(); 303251078Speter if (boothowto & RB_SERIAL) { 303351078Speter boot_speed = siocngetspeed(iobase, comspeedtab); 303451078Speter if (boot_speed) 303551078Speter comdefaultrate = boot_speed; 303651078Speter } 303751078Speter 303851078Speter /* 303951078Speter * Initialize the divisor latch. We can't rely on 304051078Speter * siocnopen() to do this the first time, since it 304151078Speter * avoids writing to the latch if the latch appears 304251078Speter * to have the correct value. Also, if we didn't 304351078Speter * just read the speed from the hardware, then we 304451078Speter * need to set the speed in hardware so that 304551078Speter * switching it later is null. 304651078Speter */ 304751078Speter cfcr = inb(iobase + com_cfcr); 304851078Speter outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 304951078Speter outb(iobase + com_dlbl, 305051078Speter COMBRD(comdefaultrate) & 0xff); 305151078Speter outb(iobase + com_dlbh, 305251078Speter (u_int) COMBRD(comdefaultrate) >> 8); 305351078Speter outb(iobase + com_cfcr, cfcr); 305451078Speter 305551078Speter siocnopen(&sp, iobase, comdefaultrate); 305651078Speter 305751078Speter splx(s); 305851078Speter if (COM_CONSOLE(flags) && !COM_LLCONSOLE(flags)) { 305951078Speter cp->cn_dev = makedev(CDEV_MAJOR, unit); 306051078Speter cp->cn_pri = COM_FORCECONSOLE(flags) 306151078Speter || boothowto & RB_SERIAL 306251078Speter ? CN_REMOTE : CN_NORMAL; 306351078Speter siocniobase = iobase; 306451078Speter siocnunit = unit; 306551078Speter } 306651078Speter if (COM_DEBUGGER(flags)) { 306751078Speter printf("sio%d: gdb debugging port\n", unit); 306851078Speter siogdbiobase = iobase; 306951078Speter siogdbunit = unit; 307051078Speter#if DDB > 0 307151078Speter gdbdev = makedev(CDEV_MAJOR, unit); 307251078Speter gdb_getc = siocngetc; 307351078Speter gdb_putc = siocnputc; 307451078Speter#endif 307551078Speter } 307651078Speter } 307751078Speter } 307851078Speter#ifdef __i386__ 307951078Speter#if DDB > 0 308051078Speter /* 308151078Speter * XXX Ugly Compatability. 308251078Speter * If no gdb port has been specified, set it to be the console 308351078Speter * as some configuration files don't specify the gdb port. 308451078Speter */ 308551078Speter if (gdbdev == NODEV && (boothowto & RB_GDB)) { 308651078Speter printf("Warning: no GDB port specified. Defaulting to sio%d.\n", 308751078Speter siocnunit); 308851078Speter printf("Set flag 0x80 on desired GDB port in your\n"); 308951078Speter printf("configuration file (currently sio only).\n"); 309051078Speter siogdbiobase = siocniobase; 309151078Speter siogdbunit = siocnunit; 309251078Speter gdbdev = makedev(CDEV_MAJOR, siocnunit); 309351078Speter gdb_getc = siocngetc; 309451078Speter gdb_putc = siocnputc; 309551078Speter } 309651078Speter#endif 309751078Speter#endif 309851078Speter} 309951078Speter 310051078Speter#ifdef __alpha__ 310151078Speter 310255868SgallatinCONS_DRIVER(sio, NULL, NULL, NULL, siocngetc, siocncheckc, siocnputc, NULL); 310351078Speter 310451078Speterint 310551078Spetersiocnattach(port, speed) 310651078Speter int port; 310751078Speter int speed; 310851078Speter{ 310951078Speter int s; 311051078Speter u_char cfcr; 311151078Speter struct siocnstate sp; 311251078Speter 311351078Speter siocniobase = port; 311451078Speter comdefaultrate = speed; 311551078Speter sio_consdev.cn_pri = CN_NORMAL; 311651078Speter sio_consdev.cn_dev = makedev(CDEV_MAJOR, 0); 311751078Speter 311851078Speter s = spltty(); 311951078Speter 312051078Speter /* 312151078Speter * Initialize the divisor latch. We can't rely on 312251078Speter * siocnopen() to do this the first time, since it 312351078Speter * avoids writing to the latch if the latch appears 312451078Speter * to have the correct value. Also, if we didn't 312551078Speter * just read the speed from the hardware, then we 312651078Speter * need to set the speed in hardware so that 312751078Speter * switching it later is null. 312851078Speter */ 312951078Speter cfcr = inb(siocniobase + com_cfcr); 313051078Speter outb(siocniobase + com_cfcr, CFCR_DLAB | cfcr); 313151078Speter outb(siocniobase + com_dlbl, 313251078Speter COMBRD(comdefaultrate) & 0xff); 313351078Speter outb(siocniobase + com_dlbh, 313451078Speter (u_int) COMBRD(comdefaultrate) >> 8); 313551078Speter outb(siocniobase + com_cfcr, cfcr); 313651078Speter 313751078Speter siocnopen(&sp, siocniobase, comdefaultrate); 313851078Speter splx(s); 313951078Speter 314051078Speter cn_tab = &sio_consdev; 314158885Simp return (0); 314251078Speter} 314351078Speter 314451078Speterint 314551078Spetersiogdbattach(port, speed) 314651078Speter int port; 314751078Speter int speed; 314851078Speter{ 314951078Speter int s; 315051078Speter u_char cfcr; 315151078Speter struct siocnstate sp; 315251078Speter 315351078Speter siogdbiobase = port; 315451078Speter gdbdefaultrate = speed; 315551078Speter 315651078Speter s = spltty(); 315751078Speter 315851078Speter /* 315951078Speter * Initialize the divisor latch. We can't rely on 316051078Speter * siocnopen() to do this the first time, since it 316151078Speter * avoids writing to the latch if the latch appears 316251078Speter * to have the correct value. Also, if we didn't 316351078Speter * just read the speed from the hardware, then we 316451078Speter * need to set the speed in hardware so that 316551078Speter * switching it later is null. 316651078Speter */ 316751078Speter cfcr = inb(siogdbiobase + com_cfcr); 316851078Speter outb(siogdbiobase + com_cfcr, CFCR_DLAB | cfcr); 316951078Speter outb(siogdbiobase + com_dlbl, 317051078Speter COMBRD(gdbdefaultrate) & 0xff); 317151078Speter outb(siogdbiobase + com_dlbh, 317251078Speter (u_int) COMBRD(gdbdefaultrate) >> 8); 317351078Speter outb(siogdbiobase + com_cfcr, cfcr); 317451078Speter 317551078Speter siocnopen(&sp, siogdbiobase, gdbdefaultrate); 317651078Speter splx(s); 317751078Speter 317858885Simp return (0); 317951078Speter} 318051078Speter 318151078Speter#endif 318251078Speter 318351078Speterstatic void 318451078Spetersiocninit(cp) 318551078Speter struct consdev *cp; 318651078Speter{ 318751078Speter comconsole = DEV_TO_UNIT(cp->cn_dev); 318851078Speter} 318951078Speter 319051078Speterstatic int 319151078Spetersiocncheckc(dev) 319251078Speter dev_t dev; 319351078Speter{ 319451078Speter int c; 319551078Speter Port_t iobase; 319651078Speter int s; 319751078Speter struct siocnstate sp; 319851078Speter 319951078Speter if (minor(dev) == siogdbunit) 320051078Speter iobase = siogdbiobase; 320151078Speter else 320251078Speter iobase = siocniobase; 320351078Speter s = spltty(); 320451078Speter siocnopen(&sp, iobase, comdefaultrate); 320551078Speter if (inb(iobase + com_lsr) & LSR_RXRDY) 320651078Speter c = inb(iobase + com_data); 320751078Speter else 320851078Speter c = -1; 320951078Speter siocnclose(&sp, iobase); 321051078Speter splx(s); 321151078Speter return (c); 321251078Speter} 321351078Speter 321451078Speter 321551078Speterint 321651078Spetersiocngetc(dev) 321751078Speter dev_t dev; 321851078Speter{ 321951078Speter int c; 322051078Speter Port_t iobase; 322151078Speter int s; 322251078Speter struct siocnstate sp; 322351078Speter 322451078Speter if (minor(dev) == siogdbunit) 322551078Speter iobase = siogdbiobase; 322651078Speter else 322751078Speter iobase = siocniobase; 322851078Speter s = spltty(); 322951078Speter siocnopen(&sp, iobase, comdefaultrate); 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 323951078Spetersiocnputc(dev, c) 324051078Speter dev_t dev; 324151078Speter int c; 324251078Speter{ 324351078Speter int s; 324451078Speter struct siocnstate sp; 324551078Speter Port_t iobase; 324651078Speter 324751078Speter if (minor(dev) == siogdbunit) 324851078Speter iobase = siogdbiobase; 324951078Speter else 325051078Speter iobase = siocniobase; 325151078Speter s = spltty(); 325251078Speter siocnopen(&sp, iobase, comdefaultrate); 325351078Speter siocntxwait(iobase); 325451078Speter outb(iobase + com_data, c); 325551078Speter siocnclose(&sp, iobase); 325651078Speter splx(s); 325751078Speter} 325851078Speter 325951078Speter#ifdef __alpha__ 326051078Speterint 326151078Spetersiogdbgetc() 326251078Speter{ 326351078Speter int c; 326451078Speter Port_t iobase; 326551078Speter int s; 326651078Speter struct siocnstate sp; 326751078Speter 326851078Speter iobase = siogdbiobase; 326951078Speter s = spltty(); 327051078Speter siocnopen(&sp, iobase, gdbdefaultrate); 327151078Speter while (!(inb(iobase + com_lsr) & LSR_RXRDY)) 327251078Speter ; 327351078Speter c = inb(iobase + com_data); 327451078Speter siocnclose(&sp, iobase); 327551078Speter splx(s); 327651078Speter return (c); 327751078Speter} 327851078Speter 327951078Spetervoid 328051078Spetersiogdbputc(c) 328151078Speter int c; 328251078Speter{ 328351078Speter int s; 328451078Speter struct siocnstate sp; 328551078Speter 328651078Speter s = spltty(); 328751078Speter siocnopen(&sp, siogdbiobase, gdbdefaultrate); 328851078Speter siocntxwait(siogdbiobase); 328951078Speter outb(siogdbiobase + com_data, c); 329051078Speter siocnclose(&sp, siogdbiobase); 329151078Speter splx(s); 329251078Speter} 329351078Speter#endif 329451078Speter 329552471SimpDRIVER_MODULE(sio, isa, sio_isa_driver, sio_devclass, 0, 0); 329652471Simp#if NCARD > 0 329752471SimpDRIVER_MODULE(sio, pccard, sio_pccard_driver, sio_devclass, 0, 0); 329852471Simp#endif 329958885Simp#if NPCI > 0 330058885SimpDRIVER_MODULE(sio, pci, sio_pci_driver, sio_devclass, 0, 0); 330158885Simp#endif 3302