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 * 4. Neither the name of the University nor the names of its contributors 1451078Speter * may be used to endorse or promote products derived from this software 1551078Speter * without specific prior written permission. 1651078Speter * 1751078Speter * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 1851078Speter * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1951078Speter * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2051078Speter * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2151078Speter * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2251078Speter * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2351078Speter * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2451078Speter * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2551078Speter * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2651078Speter * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2751078Speter * SUCH DAMAGE. 2851078Speter * 2951078Speter * from: @(#)com.c 7.5 (Berkeley) 5/16/91 3051078Speter * from: i386/isa sio.c,v 1.234 3151078Speter */ 3251078Speter 33119419Sobrien#include <sys/cdefs.h> 34119419Sobrien__FBSDID("$FreeBSD: releng/10.2/sys/dev/sio/sio.c 237693 2012-06-28 07:28:39Z imp $"); 35119419Sobrien 3651078Speter#include "opt_compat.h" 37131939Smarcel#include "opt_gdb.h" 38131939Smarcel#include "opt_kdb.h" 3951078Speter#include "opt_sio.h" 4051078Speter 4151078Speter/* 4251078Speter * Serial driver, based on 386BSD-0.1 com driver. 4351078Speter * Mostly rewritten to use pseudo-DMA. 4451078Speter * Works for National Semiconductor NS8250-NS16550AF UARTs. 4551078Speter * COM driver, based on HP dca driver. 4651078Speter * 47150460Simp * Changes for PC Card integration: 48150460Simp * - Added PC Card driver table and handlers 4951078Speter */ 5051078Speter#include <sys/param.h> 5176166Smarkm#include <sys/systm.h> 5265822Sjhb#include <sys/bus.h> 5351078Speter#include <sys/conf.h> 5451078Speter#include <sys/fcntl.h> 5551078Speter#include <sys/interrupt.h> 56131939Smarcel#include <sys/kdb.h> 5751078Speter#include <sys/kernel.h> 58114216Skan#include <sys/limits.h> 5976166Smarkm#include <sys/lock.h> 6076166Smarkm#include <sys/malloc.h> 6176166Smarkm#include <sys/module.h> 6276166Smarkm#include <sys/mutex.h> 6376166Smarkm#include <sys/proc.h> 6476166Smarkm#include <sys/reboot.h> 65131094Sphk#include <sys/serial.h> 6676166Smarkm#include <sys/sysctl.h> 6751078Speter#include <sys/syslog.h> 6876166Smarkm#include <sys/tty.h> 6951078Speter#include <machine/bus.h> 7051078Speter#include <sys/rman.h> 7151078Speter#include <sys/timepps.h> 7293466Sbde#include <sys/uio.h> 73119485Snjl#include <sys/cons.h> 7451078Speter 7586909Simp#include <isa/isavar.h> 7686909Simp 7751078Speter#include <machine/resource.h> 7851078Speter 7985302Simp#include <dev/sio/sioreg.h> 8085365Simp#include <dev/sio/siovar.h> 8151078Speter 8251078Speter#ifdef COM_ESP 8377726Sjoerg#include <dev/ic/esp.h> 8451078Speter#endif 8577726Sjoerg#include <dev/ic/ns16550.h> 8651078Speter 8751078Speter#define LOTS_OF_EVENTS 64 /* helps separate urgent events from input */ 8851078Speter 8951078Speter#ifdef COM_MULTIPORT 9051078Speter/* checks in flags for multiport and which is multiport "master chip" 9151078Speter * for a given card 9251078Speter */ 9351078Speter#define COM_ISMULTIPORT(flags) ((flags) & 0x01) 9451078Speter#define COM_MPMASTER(flags) (((flags) >> 8) & 0x0ff) 9551078Speter#define COM_NOTAST4(flags) ((flags) & 0x04) 96104067Sphk#else 97104067Sphk#define COM_ISMULTIPORT(flags) (0) 9851078Speter#endif /* COM_MULTIPORT */ 9951078Speter 100120175Sbde#define COM_C_IIR_TXRDYBUG 0x80000 10151078Speter#define COM_CONSOLE(flags) ((flags) & 0x10) 102120175Sbde#define COM_DEBUGGER(flags) ((flags) & 0x80) 103120175Sbde#define COM_FIFOSIZE(flags) (((flags) & 0xff000000) >> 24) 10451078Speter#define COM_FORCECONSOLE(flags) ((flags) & 0x20) 105120175Sbde#define COM_IIR_TXRDYBUG(flags) ((flags) & COM_C_IIR_TXRDYBUG) 10651078Speter#define COM_LLCONSOLE(flags) ((flags) & 0x40) 10751078Speter#define COM_LOSESOUTINTS(flags) ((flags) & 0x08) 108120175Sbde#define COM_NOFIFO(flags) ((flags) & 0x02) 109120175Sbde#define COM_NOPROBE(flags) ((flags) & 0x40000) 110120175Sbde#define COM_NOSCR(flags) ((flags) & 0x100000) 111111613Sphk#define COM_PPSCTS(flags) ((flags) & 0x10000) 112120175Sbde#define COM_ST16650A(flags) ((flags) & 0x20000) 113112384Ssobomax#define COM_TI16754(flags) ((flags) & 0x200000) 11451078Speter 11560471Snyan#define sio_getreg(com, off) \ 11660471Snyan (bus_space_read_1((com)->bst, (com)->bsh, (off))) 11760471Snyan#define sio_setreg(com, off, value) \ 11860471Snyan (bus_space_write_1((com)->bst, (com)->bsh, (off), (value))) 11960471Snyan 12051078Speter/* 12151078Speter * com state bits. 12251078Speter * (CS_BUSY | CS_TTGO) and (CS_BUSY | CS_TTGO | CS_ODEVREADY) must be higher 12351078Speter * than the other bits so that they can be tested as a group without masking 12451078Speter * off the low bits. 12551078Speter * 12651078Speter * The following com and tty flags correspond closely: 12751078Speter * CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and 12853344Speter * comstop()) 12951078Speter * CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart()) 13051078Speter * CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam()) 13151078Speter * CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam()) 13251078Speter * TS_FLUSH is not used. 13351078Speter * XXX I think TIOCSETA doesn't clear TS_TTSTOP when it clears IXON. 13451078Speter * XXX CS_*FLOW should be CF_*FLOW in com->flags (control flags not state). 13551078Speter */ 13651078Speter#define CS_BUSY 0x80 /* output in progress */ 13751078Speter#define CS_TTGO 0x40 /* output not stopped by XOFF */ 13851078Speter#define CS_ODEVREADY 0x20 /* external device h/w ready (CTS) */ 13951078Speter#define CS_CHECKMSR 1 /* check of MSR scheduled */ 14051078Speter#define CS_CTS_OFLOW 2 /* use CTS output flow control */ 14151078Speter#define CS_ODONE 4 /* output completed */ 14251078Speter#define CS_RTS_IFLOW 8 /* use RTS input flow control */ 14351078Speter#define CSE_BUSYCHECK 1 /* siobusycheck() scheduled */ 14451078Speter 14551078Speterstatic char const * const error_desc[] = { 14651078Speter#define CE_OVERRUN 0 14751078Speter "silo overflow", 14851078Speter#define CE_INTERRUPT_BUF_OVERFLOW 1 14951078Speter "interrupt-level buffer overflow", 15051078Speter#define CE_TTY_BUF_OVERFLOW 2 15151078Speter "tty-level buffer overflow", 15251078Speter}; 15351078Speter 15486909Simp#define CE_NTYPES 3 15551078Speter#define CE_RECORD(com, errnum) (++(com)->delta_error_counts[errnum]) 15651078Speter 15786909Simp/* types. XXX - should be elsewhere */ 15886909Simptypedef u_int Port_t; /* hardware port */ 15986909Simptypedef u_char bool_t; /* boolean */ 16086909Simp 16186909Simp/* queue of linear buffers */ 16286909Simpstruct lbq { 16386909Simp u_char *l_head; /* next char to process */ 16486909Simp u_char *l_tail; /* one past the last char to process */ 16586909Simp struct lbq *l_next; /* next in queue */ 16686909Simp bool_t l_queued; /* nonzero if queued */ 16786909Simp}; 16886909Simp 16986909Simp/* com device structure */ 17086909Simpstruct com_s { 17186909Simp u_char state; /* miscellaneous flag bits */ 17286909Simp u_char cfcr_image; /* copy of value written to CFCR */ 17351078Speter#ifdef COM_ESP 17486909Simp bool_t esp; /* is this unit a hayes esp board? */ 17586909Simp#endif 17686909Simp u_char extra_state; /* more flag bits, separate for order trick */ 17786909Simp u_char fifo_image; /* copy of value written to FIFO */ 17886909Simp bool_t hasfifo; /* nonzero for 16550 UARTs */ 17986909Simp bool_t loses_outints; /* nonzero if device loses output interrupts */ 18086909Simp u_char mcr_image; /* copy of value written to MCR */ 18186909Simp#ifdef COM_MULTIPORT 18286909Simp bool_t multiport; /* is this unit part of a multiport device? */ 18386909Simp#endif /* COM_MULTIPORT */ 18486909Simp bool_t no_irq; /* nonzero if irq is not attached */ 18586909Simp bool_t gone; /* hardware disappeared */ 18686909Simp bool_t poll; /* nonzero if polling is required */ 18786909Simp bool_t poll_output; /* nonzero if polling for output is required */ 188120175Sbde bool_t st16650a; /* nonzero if Startech 16650A compatible */ 18986909Simp int unit; /* unit number */ 190120189Sbde u_int flags; /* copy of device flags */ 19186909Simp u_int tx_fifo_size; 19286909Simp 19386909Simp /* 19486909Simp * The high level of the driver never reads status registers directly 19586909Simp * because there would be too many side effects to handle conveniently. 19686909Simp * Instead, it reads copies of the registers stored here by the 19786909Simp * interrupt handler. 19886909Simp */ 19986909Simp u_char last_modem_status; /* last MSR read by intr handler */ 20086909Simp u_char prev_modem_status; /* last MSR handled by high level */ 20186909Simp 20286909Simp u_char *ibuf; /* start of input buffer */ 20386909Simp u_char *ibufend; /* end of input buffer */ 20486909Simp u_char *ibufold; /* old input buffer, to be freed */ 20586909Simp u_char *ihighwater; /* threshold in input buffer */ 20686909Simp u_char *iptr; /* next free spot in input buffer */ 20786909Simp int ibufsize; /* size of ibuf (not include error bytes) */ 20886909Simp int ierroff; /* offset of error bytes in ibuf */ 20986909Simp 21086909Simp struct lbq obufq; /* head of queue of output buffers */ 21186909Simp struct lbq obufs[2]; /* output buffers */ 21286909Simp 21386909Simp bus_space_tag_t bst; 21486909Simp bus_space_handle_t bsh; 21586909Simp 21686909Simp Port_t data_port; /* i/o ports */ 21786909Simp#ifdef COM_ESP 21886909Simp Port_t esp_port; 21986909Simp#endif 220120189Sbde Port_t int_ctl_port; 22186909Simp Port_t int_id_port; 22286909Simp Port_t modem_ctl_port; 22386909Simp Port_t line_status_port; 22486909Simp Port_t modem_status_port; 22586909Simp 22686909Simp struct tty *tp; /* cross reference */ 22786909Simp 22886909Simp struct pps_state pps; 229111613Sphk int pps_bit; 230225203Srwatson#ifdef KDB 231119485Snjl int alt_brk_state; 232119485Snjl#endif 23386909Simp 23486909Simp u_long bytes_in; /* statistics */ 23586909Simp u_long bytes_out; 23686909Simp u_int delta_error_counts[CE_NTYPES]; 23786909Simp u_long error_counts[CE_NTYPES]; 23886909Simp 23989986Sjhay u_long rclk; 24089986Sjhay 24186909Simp struct resource *irqres; 24286909Simp struct resource *ioportres; 243116120Sscottl int ioportrid; 244116120Sscottl void *cookie; 24586909Simp 24686909Simp /* 24786909Simp * Data area for output buffers. Someday we should build the output 24886909Simp * buffer queue without copying data. 24986909Simp */ 25086909Simp u_char obuf1[256]; 25186909Simp u_char obuf2[256]; 25286909Simp}; 25386909Simp 25486909Simp#ifdef COM_ESP 25593010Sbdestatic int espattach(struct com_s *com, Port_t esp_port); 25651078Speter#endif 25751078Speter 258131373Sphkstatic void combreak(struct tty *tp, int sig); 25951078Speterstatic timeout_t siobusycheck; 26093010Sbdestatic u_int siodivisor(u_long rclk, speed_t speed); 261136478Sphkstatic void comclose(struct tty *tp); 262136478Sphkstatic int comopen(struct tty *tp, struct cdev *dev); 26393010Sbdestatic void sioinput(struct com_s *com); 26493010Sbdestatic void siointr1(struct com_s *com); 265166901Spisostatic int siointr(void *arg); 266131094Sphkstatic int commodem(struct tty *tp, int sigon, int sigoff); 26793010Sbdestatic int comparam(struct tty *tp, struct termios *t); 26893010Sbdestatic void siopoll(void *); 26993010Sbdestatic void siosettimeout(void); 27093010Sbdestatic int siosetwater(struct com_s *com, speed_t speed); 27193010Sbdestatic void comstart(struct tty *tp); 27293010Sbdestatic void comstop(struct tty *tp, int rw); 27351078Speterstatic timeout_t comwakeup; 27451078Speter 27585365Simpchar sio_driver_name[] = "sio"; 27670174Sjhbstatic struct mtx sio_lock; 27770174Sjhbstatic int sio_inited; 27851078Speter 27951078Speter/* table and macro for fast conversion from a unit number to its com struct */ 28085365Simpdevclass_t sio_devclass; 281237693Simp/* 282237693Simp * XXX Assmues that devclass_get_device, devclass_get_softc and 283237693Simp * device_get_softc are fast interrupt safe. The current implementation 284237693Simp * of these functions are. 285237693Simp */ 28651078Speter#define com_addr(unit) ((struct com_s *) \ 28786909Simp devclass_get_softc(sio_devclass, unit)) /* XXX */ 28851078Speter 289114722Sobrienint comconsole = -1; 29051078Speterstatic volatile speed_t comdefaultrate = CONSPEED; 29189986Sjhaystatic u_long comdefaultrclk = DEFAULT_RCLK; 29289986SjhaySYSCTL_ULONG(_machdep, OID_AUTO, conrclk, CTLFLAG_RW, &comdefaultrclk, 0, ""); 29398401Sn_hibmastatic speed_t gdbdefaultrate = GDBSPEED; 29498401Sn_hibmaSYSCTL_UINT(_machdep, OID_AUTO, gdbspeed, CTLFLAG_RW, 29598401Sn_hibma &gdbdefaultrate, GDBSPEED, ""); 29651078Speterstatic u_int com_events; /* input chars + weighted output completions */ 29751078Speterstatic Port_t siocniobase; 29898401Sn_hibmastatic int siocnunit = -1; 29972238Sjhbstatic void *sio_slow_ih; 30072238Sjhbstatic void *sio_fast_ih; 30151078Speterstatic int sio_timeout; 30251078Speterstatic int sio_timeouts_until_log; 30351078Speterstatic struct callout_handle sio_timeout_handle 30451078Speter = CALLOUT_HANDLE_INITIALIZER(&sio_timeout_handle); 30553344Speterstatic int sio_numunits; 30651078Speter 307131939Smarcel#ifdef GDB 308131939Smarcelstatic Port_t siogdbiobase = 0; 309131939Smarcel#endif 310131939Smarcel 31151078Speter#ifdef COM_ESP 31251078Speter/* XXX configure this properly. */ 31386909Simp/* XXX quite broken for new-bus. */ 31451078Speterstatic Port_t likely_com_ports[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, }; 31551078Speterstatic Port_t likely_esp_ports[] = { 0x140, 0x180, 0x280, 0 }; 31651078Speter#endif 31751078Speter 31851078Speter/* 31951078Speter * handle sysctl read/write requests for console speed 32051078Speter * 32151078Speter * In addition to setting comdefaultrate for I/O through /dev/console, 32251078Speter * also set the initial and lock values for the /dev/ttyXX device 32351078Speter * if there is one associated with the console. Finally, if the /dev/tty 32451078Speter * device has already been open, change the speed on the open running port 32551078Speter * itself. 32651078Speter */ 32751078Speter 32851078Speterstatic int 32962573Sphksysctl_machdep_comdefaultrate(SYSCTL_HANDLER_ARGS) 33051078Speter{ 33151078Speter int error, s; 33251078Speter speed_t newspeed; 33351078Speter struct com_s *com; 33451078Speter struct tty *tp; 33551078Speter 33651078Speter newspeed = comdefaultrate; 33751078Speter 33851078Speter error = sysctl_handle_opaque(oidp, &newspeed, sizeof newspeed, req); 33951078Speter if (error || !req->newptr) 34051078Speter return (error); 34151078Speter 34251078Speter comdefaultrate = newspeed; 34351078Speter 34451078Speter if (comconsole < 0) /* serial console not selected? */ 34551078Speter return (0); 34651078Speter 34751078Speter com = com_addr(comconsole); 34857915Simp if (com == NULL) 34951078Speter return (ENXIO); 35051078Speter 351135329Sphk tp = com->tp; 352135516Snyan if (tp == NULL) 353135516Snyan return (ENXIO); 354135516Snyan 35551078Speter /* 35651078Speter * set the initial and lock rates for /dev/ttydXX and /dev/cuaXX 35751078Speter * (note, the lock rates really are boolean -- if non-zero, disallow 35851078Speter * speed changes) 35951078Speter */ 360135329Sphk tp->t_init_in.c_ispeed = tp->t_init_in.c_ospeed = 361135329Sphk tp->t_lock_in.c_ispeed = tp->t_lock_in.c_ospeed = 362135329Sphk tp->t_init_out.c_ispeed = tp->t_init_out.c_ospeed = 363135329Sphk tp->t_lock_out.c_ispeed = tp->t_lock_out.c_ospeed = comdefaultrate; 36451078Speter 365135516Snyan if (tp->t_state & TS_ISOPEN) { 36651078Speter tp->t_termios.c_ispeed = 36751078Speter tp->t_termios.c_ospeed = comdefaultrate; 36851078Speter s = spltty(); 36951078Speter error = comparam(tp, &tp->t_termios); 37051078Speter splx(s); 37151078Speter } 37251078Speter return error; 37351078Speter} 37451078Speter 37551078SpeterSYSCTL_PROC(_machdep, OID_AUTO, conspeed, CTLTYPE_INT | CTLFLAG_RW, 37651078Speter 0, 0, sysctl_machdep_comdefaultrate, "I", ""); 377153195SimpTUNABLE_INT("machdep.conspeed", __DEVOLATILE(int *, &comdefaultrate)); 37851078Speter 37986909Simp#define SET_FLAG(dev, bit) device_set_flags(dev, device_get_flags(dev) | (bit)) 38086909Simp#define CLR_FLAG(dev, bit) device_set_flags(dev, device_get_flags(dev) & ~(bit)) 38186909Simp 38286909Simp/* 38386909Simp * Unload the driver and clear the table. 38486909Simp * XXX this is mostly wrong. 38586909Simp * XXX TODO: 38686909Simp * This is usually called when the card is ejected, but 387104933Simp * can be caused by a kldunload of a controller driver. 38886909Simp * The idea is to reset the driver's view of the device 38986909Simp * and ensure that any driver entry points such as 39086909Simp * read and write do not hang. 39186909Simp */ 39285365Simpint 393136478Sphksiodetach(device_t dev) 39451078Speter{ 39551078Speter struct com_s *com; 39651078Speter 39752471Simp com = (struct com_s *) device_get_softc(dev); 39857915Simp if (com == NULL) { 39952471Simp device_printf(dev, "NULL com in siounload\n"); 40054386Simp return (0); 40151078Speter } 402120175Sbde com->gone = TRUE; 403132561Simp if (com->tp) 404136478Sphk ttyfree(com->tp); 40554386Simp if (com->irqres) { 40654386Simp bus_teardown_intr(dev, com->irqres, com->cookie); 40754386Simp bus_release_resource(dev, SYS_RES_IRQ, 0, com->irqres); 40854386Simp } 40954386Simp if (com->ioportres) 410116120Sscottl bus_release_resource(dev, SYS_RES_IOPORT, com->ioportrid, 411116120Sscottl com->ioportres); 412136478Sphk if (com->ibuf != NULL) 413136478Sphk free(com->ibuf, M_DEVBUF); 414136478Sphk 415136478Sphk device_set_softc(dev, NULL); 416136478Sphk free(com, M_DEVBUF); 41753978Simp return (0); 41851078Speter} 41951078Speter 42085365Simpint 42189986Sjhaysioprobe(dev, xrid, rclk, noprobe) 42258885Simp device_t dev; 42358885Simp int xrid; 42489986Sjhay u_long rclk; 42585365Simp int noprobe; 42651078Speter{ 42753344Speter#if 0 42851078Speter static bool_t already_init; 42953344Speter device_t xdev; 43053344Speter#endif 43160471Snyan struct com_s *com; 43289986Sjhay u_int divisor; 43351078Speter bool_t failures[10]; 43451078Speter int fn; 43551078Speter device_t idev; 43651078Speter Port_t iobase; 43751078Speter intrmask_t irqmap[4]; 43851078Speter intrmask_t irqs; 43951078Speter u_char mcr_image; 44051078Speter int result; 44154206Speter u_long xirq; 44251088Speter u_int flags = device_get_flags(dev); 44351078Speter int rid; 44451078Speter struct resource *port; 44551078Speter 44658885Simp rid = xrid; 44751078Speter port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 44851078Speter 0, ~0, IO_COMSIZE, RF_ACTIVE); 44951078Speter if (!port) 45057915Simp return (ENXIO); 45151078Speter 45286909Simp com = malloc(sizeof(*com), M_DEVBUF, M_NOWAIT | M_ZERO); 453124669Sru if (com == NULL) { 454124669Sru bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 45586909Simp return (ENOMEM); 456124669Sru } 45786909Simp device_set_softc(dev, com); 45860471Snyan com->bst = rman_get_bustag(port); 45960471Snyan com->bsh = rman_get_bushandle(port); 46089986Sjhay if (rclk == 0) 46189986Sjhay rclk = DEFAULT_RCLK; 46289986Sjhay com->rclk = rclk; 46360471Snyan 46485209Sjhb while (sio_inited != 2) 46585209Sjhb if (atomic_cmpset_int(&sio_inited, 0, 1)) { 46693818Sjhb mtx_init(&sio_lock, sio_driver_name, NULL, 46793818Sjhb (comconsole != -1) ? 46885209Sjhb MTX_SPIN | MTX_QUIET : MTX_SPIN); 46985209Sjhb atomic_store_rel_int(&sio_inited, 2); 47085209Sjhb } 47170174Sjhb 47253344Speter#if 0 47353344Speter /* 47453344Speter * XXX this is broken - when we are first called, there are no 47553344Speter * previously configured IO ports. We could hard code 47653344Speter * 0x3f8, 0x2f8, 0x3e8, 0x2e8 etc but that's probably worse. 47753344Speter * This code has been doing nothing since the conversion since 47853344Speter * "count" is zero the first time around. 47953344Speter */ 48051078Speter if (!already_init) { 48151078Speter /* 48251078Speter * Turn off MCR_IENABLE for all likely serial ports. An unused 48351078Speter * port with its MCR_IENABLE gate open will inhibit interrupts 48451078Speter * from any used port that shares the interrupt vector. 48551078Speter * XXX the gate enable is elsewhere for some multiports. 48651078Speter */ 48751078Speter device_t *devs; 48853344Speter int count, i, xioport; 48951078Speter 49051078Speter devclass_get_devices(sio_devclass, &devs, &count); 49151078Speter for (i = 0; i < count; i++) { 49251078Speter xdev = devs[i]; 49354194Speter if (device_is_enabled(xdev) && 49454194Speter bus_get_resource(xdev, SYS_RES_IOPORT, 0, &xioport, 49554194Speter NULL) == 0) 49653344Speter outb(xioport + com_mcr, 0); 49751078Speter } 49851078Speter free(devs, M_TEMP); 49951078Speter already_init = TRUE; 50051078Speter } 50153344Speter#endif 50251078Speter 50351078Speter if (COM_LLCONSOLE(flags)) { 50451078Speter printf("sio%d: reserved for low-level i/o\n", 50551078Speter device_get_unit(dev)); 50656788Sbde bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 50786909Simp device_set_softc(dev, NULL); 50886909Simp free(com, M_DEVBUF); 50951078Speter return (ENXIO); 51051078Speter } 51151078Speter 51251078Speter /* 51351078Speter * If the device is on a multiport card and has an AST/4 51451078Speter * compatible interrupt control register, initialize this 51551078Speter * register and prepare to leave MCR_IENABLE clear in the mcr. 51651078Speter * Otherwise, prepare to set MCR_IENABLE in the mcr. 51751078Speter * Point idev to the device struct giving the correct id_irq. 51851078Speter * This is the struct for the master device if there is one. 51951078Speter */ 52051078Speter idev = dev; 52151078Speter mcr_image = MCR_IENABLE; 52251078Speter#ifdef COM_MULTIPORT 52357234Sbde if (COM_ISMULTIPORT(flags)) { 52454206Speter Port_t xiobase; 52554206Speter u_long io; 52654206Speter 52751078Speter idev = devclass_get_device(sio_devclass, COM_MPMASTER(flags)); 52851078Speter if (idev == NULL) { 52951078Speter printf("sio%d: master device %d not configured\n", 53051078Speter device_get_unit(dev), COM_MPMASTER(flags)); 53151078Speter idev = dev; 53251078Speter } 53357234Sbde if (!COM_NOTAST4(flags)) { 53457234Sbde if (bus_get_resource(idev, SYS_RES_IOPORT, 0, &io, 53557234Sbde NULL) == 0) { 53657234Sbde xiobase = io; 53757234Sbde if (bus_get_resource(idev, SYS_RES_IRQ, 0, 53857234Sbde NULL, NULL) == 0) 53957234Sbde outb(xiobase + com_scr, 0x80); 54057234Sbde else 54157234Sbde outb(xiobase + com_scr, 0); 54257234Sbde } 54357234Sbde mcr_image = 0; 54451078Speter } 54551078Speter } 54651078Speter#endif /* COM_MULTIPORT */ 54754194Speter if (bus_get_resource(idev, SYS_RES_IRQ, 0, NULL, NULL) != 0) 54851078Speter mcr_image = 0; 54951078Speter 55051078Speter bzero(failures, sizeof failures); 55151078Speter iobase = rman_get_start(port); 55251078Speter 55351078Speter /* 55451078Speter * We don't want to get actual interrupts, just masked ones. 55551078Speter * Interrupts from this line should already be masked in the ICU, 55651078Speter * but mask them in the processor as well in case there are some 55751078Speter * (misconfigured) shared interrupts. 55851078Speter */ 55972200Sbmilekic mtx_lock_spin(&sio_lock); 56051078Speter/* EXTRA DELAY? */ 56151078Speter 56251078Speter /* 563112384Ssobomax * For the TI16754 chips, set prescaler to 1 (4 is often the 564112384Ssobomax * default after-reset value) as otherwise it's impossible to 565112270Ssobomax * get highest baudrates. 566112270Ssobomax */ 567112270Ssobomax if (COM_TI16754(flags)) { 568112384Ssobomax u_char cfcr, efr; 569112270Ssobomax 570112384Ssobomax cfcr = sio_getreg(com, com_cfcr); 571112384Ssobomax sio_setreg(com, com_cfcr, CFCR_EFR_ENABLE); 572112384Ssobomax efr = sio_getreg(com, com_efr); 573112384Ssobomax /* Unlock extended features to turn off prescaler. */ 574112384Ssobomax sio_setreg(com, com_efr, efr | EFR_EFE); 575112384Ssobomax /* Disable EFR. */ 576112384Ssobomax sio_setreg(com, com_cfcr, (cfcr != CFCR_EFR_ENABLE) ? cfcr : 0); 577112384Ssobomax /* Turn off prescaler. */ 578112384Ssobomax sio_setreg(com, com_mcr, 579112384Ssobomax sio_getreg(com, com_mcr) & ~MCR_PRESCALE); 580112384Ssobomax sio_setreg(com, com_cfcr, CFCR_EFR_ENABLE); 581112384Ssobomax sio_setreg(com, com_efr, efr); 582112384Ssobomax sio_setreg(com, com_cfcr, cfcr); 583112270Ssobomax } 584112384Ssobomax 585112270Ssobomax /* 58651078Speter * Initialize the speed and the word size and wait long enough to 58751078Speter * drain the maximum of 16 bytes of junk in device output queues. 58851078Speter * The speed is undefined after a master reset and must be set 58951078Speter * before relying on anything related to output. There may be 59051078Speter * junk after a (very fast) soft reboot and (apparently) after 59151078Speter * master reset. 59251078Speter * XXX what about the UART bug avoided by waiting in comparam()? 59351078Speter * We don't want to to wait long enough to drain at 2 bps. 59451078Speter */ 59551078Speter if (iobase == siocniobase) 59651078Speter DELAY((16 + 1) * 1000000 / (comdefaultrate / 10)); 59751078Speter else { 59860471Snyan sio_setreg(com, com_cfcr, CFCR_DLAB | CFCR_8BITS); 59989986Sjhay divisor = siodivisor(rclk, SIO_TEST_SPEED); 60089986Sjhay sio_setreg(com, com_dlbl, divisor & 0xff); 60189986Sjhay sio_setreg(com, com_dlbh, divisor >> 8); 60260471Snyan sio_setreg(com, com_cfcr, CFCR_8BITS); 60351078Speter DELAY((16 + 1) * 1000000 / (SIO_TEST_SPEED / 10)); 60451078Speter } 60551078Speter 60651078Speter /* 607172568Skevlo * Enable the interrupt gate and disable device interrupts. This 60851078Speter * should leave the device driving the interrupt line low and 60951078Speter * guarantee an edge trigger if an interrupt can be generated. 61051078Speter */ 61151078Speter/* EXTRA DELAY? */ 61260471Snyan sio_setreg(com, com_mcr, mcr_image); 61360471Snyan sio_setreg(com, com_ier, 0); 61451078Speter DELAY(1000); /* XXX */ 61551078Speter irqmap[0] = isa_irq_pending(); 61651078Speter 61751078Speter /* 61851078Speter * Attempt to set loopback mode so that we can send a null byte 61951078Speter * without annoying any external device. 62051078Speter */ 62151078Speter/* EXTRA DELAY? */ 62260471Snyan sio_setreg(com, com_mcr, mcr_image | MCR_LOOPBACK); 62351078Speter 62451078Speter /* 62551078Speter * Attempt to generate an output interrupt. On 8250's, setting 62651078Speter * IER_ETXRDY generates an interrupt independent of the current 62751078Speter * setting and independent of whether the THR is empty. On 16450's, 62851078Speter * setting IER_ETXRDY generates an interrupt independent of the 62951078Speter * current setting. On 16550A's, setting IER_ETXRDY only 63051078Speter * generates an interrupt when IER_ETXRDY is not already set. 63151078Speter */ 63260471Snyan sio_setreg(com, com_ier, IER_ETXRDY); 63351078Speter 63451078Speter /* 63551078Speter * On some 16x50 incompatibles, setting IER_ETXRDY doesn't generate 63651078Speter * an interrupt. They'd better generate one for actually doing 63751078Speter * output. Loopback may be broken on the same incompatibles but 63851078Speter * it's unlikely to do more than allow the null byte out. 63951078Speter */ 64060471Snyan sio_setreg(com, com_data, 0); 641120468Sbde if (iobase == siocniobase) 642120468Sbde DELAY((1 + 2) * 1000000 / (comdefaultrate / 10)); 643120468Sbde else 644120468Sbde DELAY((1 + 2) * 1000000 / (SIO_TEST_SPEED / 10)); 64551078Speter 64651078Speter /* 64751078Speter * Turn off loopback mode so that the interrupt gate works again 64851078Speter * (MCR_IENABLE was hidden). This should leave the device driving 64951078Speter * an interrupt line high. It doesn't matter if the interrupt 65051078Speter * line oscillates while we are not looking at it, since interrupts 65151078Speter * are disabled. 65251078Speter */ 65351078Speter/* EXTRA DELAY? */ 65460471Snyan sio_setreg(com, com_mcr, mcr_image); 65592401Simp 65692401Simp /* 65792401Simp * It seems my Xircom CBEM56G Cardbus modem wants to be reset 65892401Simp * to 8 bits *again*, or else probe test 0 will fail. 65992401Simp * gwk@sgi.com, 4/19/2001 66092401Simp */ 66192401Simp sio_setreg(com, com_cfcr, CFCR_8BITS); 66251078Speter 66351078Speter /* 664120189Sbde * Some PCMCIA cards (Palido 321s, DC-1S, ...) have the "TXRDY bug", 665120189Sbde * so we probe for a buggy IIR_TXRDY implementation even in the 666120189Sbde * noprobe case. We don't probe for it in the !noprobe case because 667120189Sbde * noprobe is always set for PCMCIA cards and the problem is not 668120189Sbde * known to affect any other cards. 66951078Speter */ 67085365Simp if (noprobe) { 671120189Sbde /* Read IIR a few times. */ 67253370Speter for (fn = 0; fn < 2; fn ++) { 67353370Speter DELAY(10000); 67460471Snyan failures[6] = sio_getreg(com, com_iir); 67553370Speter } 676120189Sbde 677120189Sbde /* IIR_TXRDY should be clear. Is it? */ 67853370Speter result = 0; 67953370Speter if (failures[6] & IIR_TXRDY) { 680120189Sbde /* 681120189Sbde * No. We seem to have the bug. Does our fix for 682120189Sbde * it work? 683120189Sbde */ 68460471Snyan sio_setreg(com, com_ier, 0); 68560471Snyan if (sio_getreg(com, com_iir) & IIR_NOPEND) { 686120189Sbde /* Yes. We discovered the TXRDY bug! */ 68753370Speter SET_FLAG(dev, COM_C_IIR_TXRDYBUG); 68853370Speter } else { 689120189Sbde /* No. Just fail. XXX */ 69053370Speter result = ENXIO; 69181793Simp sio_setreg(com, com_mcr, 0); 69253370Speter } 69351078Speter } else { 694120189Sbde /* Yes. No bug. */ 69553370Speter CLR_FLAG(dev, COM_C_IIR_TXRDYBUG); 69651078Speter } 69781793Simp sio_setreg(com, com_ier, 0); 69860471Snyan sio_setreg(com, com_cfcr, CFCR_8BITS); 69972200Sbmilekic mtx_unlock_spin(&sio_lock); 70053344Speter bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 701128899Sambrisko if (iobase == siocniobase) 70286909Simp result = 0; 703183692Simp /* 704183692Simp * XXX: Since we don't return 0, we shouldn't be relying on 705183692Simp * the softc that we set to persist to the call to attach 706183692Simp * since other probe routines may be called, and the malloc 707183692Simp * here causes subr_bus to not allocate anything for the 708183692Simp * other probes. Instead, this softc is preserved and other 709183692Simp * probe routines can corrupt it. 710183692Simp */ 71186909Simp if (result != 0) { 71286909Simp device_set_softc(dev, NULL); 71386909Simp free(com, M_DEVBUF); 71486909Simp } 715160420Simp return (result == 0 ? BUS_PROBE_DEFAULT + 1 : result); 71653344Speter } 71753344Speter 71851078Speter /* 71951078Speter * Check that 72051078Speter * o the CFCR, IER and MCR in UART hold the values written to them 72151078Speter * (the values happen to be all distinct - this is good for 72251078Speter * avoiding false positive tests from bus echoes). 72351078Speter * o an output interrupt is generated and its vector is correct. 72451078Speter * o the interrupt goes away when the IIR in the UART is read. 72551078Speter */ 72651078Speter/* EXTRA DELAY? */ 72760471Snyan failures[0] = sio_getreg(com, com_cfcr) - CFCR_8BITS; 72860471Snyan failures[1] = sio_getreg(com, com_ier) - IER_ETXRDY; 729112270Ssobomax failures[2] = sio_getreg(com, com_mcr) - mcr_image; 73051078Speter DELAY(10000); /* Some internal modems need this time */ 73151078Speter irqmap[1] = isa_irq_pending(); 73260471Snyan failures[4] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_TXRDY; 73351078Speter DELAY(1000); /* XXX */ 73451078Speter irqmap[2] = isa_irq_pending(); 73560471Snyan failures[6] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 73651078Speter 73751078Speter /* 73851078Speter * Turn off all device interrupts and check that they go off properly. 73951078Speter * Leave MCR_IENABLE alone. For ports without a master port, it gates 74051078Speter * the OUT2 output of the UART to 74151078Speter * the ICU input. Closing the gate would give a floating ICU input 74251078Speter * (unless there is another device driving it) and spurious interrupts. 74351078Speter * (On the system that this was first tested on, the input floats high 74451078Speter * and gives a (masked) interrupt as soon as the gate is closed.) 74551078Speter */ 74660471Snyan sio_setreg(com, com_ier, 0); 74760471Snyan sio_setreg(com, com_cfcr, CFCR_8BITS); /* dummy to avoid bus echo */ 74860471Snyan failures[7] = sio_getreg(com, com_ier); 74951078Speter DELAY(1000); /* XXX */ 75051078Speter irqmap[3] = isa_irq_pending(); 75160471Snyan failures[9] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 75251078Speter 75372200Sbmilekic mtx_unlock_spin(&sio_lock); 75451078Speter 75551078Speter irqs = irqmap[1] & ~irqmap[0]; 75654194Speter if (bus_get_resource(idev, SYS_RES_IRQ, 0, &xirq, NULL) == 0 && 75789463Simp ((1 << xirq) & irqs) == 0) { 75851078Speter printf( 75954206Speter "sio%d: configured irq %ld not in bitmap of probed irqs %#x\n", 76053344Speter device_get_unit(dev), xirq, irqs); 76189447Sbmah printf( 76289470Sbmah "sio%d: port may not be enabled\n", 76389447Sbmah device_get_unit(dev)); 76489463Simp } 76551078Speter if (bootverbose) 76651078Speter printf("sio%d: irq maps: %#x %#x %#x %#x\n", 76751078Speter device_get_unit(dev), 76851078Speter irqmap[0], irqmap[1], irqmap[2], irqmap[3]); 76951078Speter 770128899Sambrisko result = 0; 771128899Sambrisko for (fn = 0; fn < sizeof failures; ++fn) 77251078Speter if (failures[fn]) { 77360471Snyan sio_setreg(com, com_mcr, 0); 77451078Speter result = ENXIO; 77551078Speter if (bootverbose) { 77651078Speter printf("sio%d: probe failed test(s):", 77751078Speter device_get_unit(dev)); 77851078Speter for (fn = 0; fn < sizeof failures; ++fn) 77951078Speter if (failures[fn]) 78051078Speter printf(" %d", fn); 78151078Speter printf("\n"); 78251078Speter } 78351078Speter break; 78451078Speter } 78551078Speter bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 786128899Sambrisko if (iobase == siocniobase) 78786909Simp result = 0; 788183692Simp /* 789183692Simp * XXX: Since we don't return 0, we shouldn't be relying on the softc 790183692Simp * that we set to persist to the call to attach since other probe 791183692Simp * routines may be called, and the malloc here causes subr_bus to not 792183692Simp * allocate anything for the other probes. Instead, this softc is 793183692Simp * preserved and other probe routines can corrupt it. 794183692Simp */ 79586909Simp if (result != 0) { 79686909Simp device_set_softc(dev, NULL); 79786909Simp free(com, M_DEVBUF); 79886909Simp } 799160420Simp return (result == 0 ? BUS_PROBE_DEFAULT + 1 : result); 80051078Speter} 80151078Speter 80251078Speter#ifdef COM_ESP 80351078Speterstatic int 80451078Speterespattach(com, esp_port) 80551078Speter struct com_s *com; 80651078Speter Port_t esp_port; 80751078Speter{ 80851078Speter u_char dips; 80951078Speter u_char val; 81051078Speter 81151078Speter /* 81251078Speter * Check the ESP-specific I/O port to see if we're an ESP 81351078Speter * card. If not, return failure immediately. 81451078Speter */ 81551078Speter if ((inb(esp_port) & 0xf3) == 0) { 81651078Speter printf(" port 0x%x is not an ESP board?\n", esp_port); 81751078Speter return (0); 81851078Speter } 81951078Speter 82051078Speter /* 82151078Speter * We've got something that claims to be a Hayes ESP card. 82251078Speter * Let's hope so. 82351078Speter */ 82451078Speter 82551078Speter /* Get the dip-switch configuration */ 82651078Speter outb(esp_port + ESP_CMD1, ESP_GETDIPS); 82751078Speter dips = inb(esp_port + ESP_STATUS1); 82851078Speter 82951078Speter /* 83051078Speter * Bits 0,1 of dips say which COM port we are. 83151078Speter */ 83260471Snyan if (rman_get_start(com->ioportres) == likely_com_ports[dips & 0x03]) 83351078Speter printf(" : ESP"); 83451078Speter else { 83551078Speter printf(" esp_port has com %d\n", dips & 0x03); 83651078Speter return (0); 83751078Speter } 83851078Speter 83951078Speter /* 84051078Speter * Check for ESP version 2.0 or later: bits 4,5,6 = 010. 84151078Speter */ 84251078Speter outb(esp_port + ESP_CMD1, ESP_GETTEST); 84351078Speter val = inb(esp_port + ESP_STATUS1); /* clear reg 1 */ 84451078Speter val = inb(esp_port + ESP_STATUS2); 84551078Speter if ((val & 0x70) < 0x20) { 84651078Speter printf("-old (%o)", val & 0x70); 84751078Speter return (0); 84851078Speter } 84951078Speter 85051078Speter /* 85151078Speter * Check for ability to emulate 16550: bit 7 == 1 85251078Speter */ 85351078Speter if ((dips & 0x80) == 0) { 85451078Speter printf(" slave"); 85551078Speter return (0); 85651078Speter } 85751078Speter 85851078Speter /* 85951078Speter * Okay, we seem to be a Hayes ESP card. Whee. 86051078Speter */ 86151078Speter com->esp = TRUE; 86251078Speter com->esp_port = esp_port; 86351078Speter return (1); 86451078Speter} 86551078Speter#endif /* COM_ESP */ 86651078Speter 86785365Simpint 86889986Sjhaysioattach(dev, xrid, rclk) 86951078Speter device_t dev; 87058885Simp int xrid; 87189986Sjhay u_long rclk; 87251078Speter{ 87351078Speter struct com_s *com; 87451078Speter#ifdef COM_ESP 87551078Speter Port_t *espp; 87651078Speter#endif 87751078Speter Port_t iobase; 87851078Speter int unit; 87953344Speter u_int flags; 88051078Speter int rid; 88151078Speter struct resource *port; 88253344Speter int ret; 883136478Sphk int error; 884135329Sphk struct tty *tp; 88551078Speter 88658885Simp rid = xrid; 88751078Speter port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 88851078Speter 0, ~0, IO_COMSIZE, RF_ACTIVE); 88951078Speter if (!port) 89057915Simp return (ENXIO); 89151078Speter 89251078Speter iobase = rman_get_start(port); 89351078Speter unit = device_get_unit(dev); 89451078Speter com = device_get_softc(dev); 89553344Speter flags = device_get_flags(dev); 89651078Speter 89753344Speter if (unit >= sio_numunits) 89853344Speter sio_numunits = unit + 1; 89951078Speter /* 90051078Speter * sioprobe() has initialized the device registers as follows: 90151078Speter * o cfcr = CFCR_8BITS. 90251078Speter * It is most important that CFCR_DLAB is off, so that the 90351078Speter * data port is not hidden when we enable interrupts. 90451078Speter * o ier = 0. 90551078Speter * Interrupts are only enabled when the line is open. 90651078Speter * o mcr = MCR_IENABLE, or 0 if the port has AST/4 compatible 90751078Speter * interrupt control register or the config specifies no irq. 90851078Speter * Keeping MCR_DTR and MCR_RTS off might stop the external 90951078Speter * device from sending before we are ready. 91051078Speter */ 91151078Speter bzero(com, sizeof *com); 91251078Speter com->unit = unit; 91351078Speter com->ioportres = port; 914116120Sscottl com->ioportrid = rid; 91560471Snyan com->bst = rman_get_bustag(port); 91660471Snyan com->bsh = rman_get_bushandle(port); 91751078Speter com->cfcr_image = CFCR_8BITS; 91851078Speter com->loses_outints = COM_LOSESOUTINTS(flags) != 0; 91957234Sbde com->no_irq = bus_get_resource(dev, SYS_RES_IRQ, 0, NULL, NULL) != 0; 92051078Speter com->tx_fifo_size = 1; 92151078Speter com->obufs[0].l_head = com->obuf1; 92251078Speter com->obufs[1].l_head = com->obuf2; 92351078Speter 92451078Speter com->data_port = iobase + com_data; 925120189Sbde com->int_ctl_port = iobase + com_ier; 92651078Speter com->int_id_port = iobase + com_iir; 92751078Speter com->modem_ctl_port = iobase + com_mcr; 92851078Speter com->mcr_image = inb(com->modem_ctl_port); 92951078Speter com->line_status_port = iobase + com_lsr; 93051078Speter com->modem_status_port = iobase + com_msr; 93151078Speter 932135367Sphk tp = com->tp = ttyalloc(); 933135329Sphk tp->t_oproc = comstart; 934135329Sphk tp->t_param = comparam; 935135329Sphk tp->t_stop = comstop; 936135329Sphk tp->t_modem = commodem; 937135329Sphk tp->t_break = combreak; 938136478Sphk tp->t_close = comclose; 939136478Sphk tp->t_open = comopen; 940135329Sphk tp->t_sc = com; 941135329Sphk 94289986Sjhay if (rclk == 0) 94389986Sjhay rclk = DEFAULT_RCLK; 94489986Sjhay com->rclk = rclk; 94589986Sjhay 946136478Sphk if (unit == comconsole) 947136450Sphk ttyconsolemode(tp, comdefaultrate); 948136478Sphk error = siosetwater(com, tp->t_init_in.c_ispeed); 949136478Sphk mtx_unlock_spin(&sio_lock); 950136478Sphk if (error) { 95156788Sbde /* 95256788Sbde * Leave i/o resources allocated if this is a `cn'-level 95356788Sbde * console, so that other devices can't snarf them. 95456788Sbde */ 95556788Sbde if (iobase != siocniobase) 95656788Sbde bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 95756788Sbde return (ENOMEM); 95851078Speter } 95951078Speter 96051078Speter /* attempt to determine UART type */ 96151078Speter printf("sio%d: type", unit); 96251078Speter 963104067Sphk if (!COM_ISMULTIPORT(flags) && 964104067Sphk !COM_IIR_TXRDYBUG(flags) && !COM_NOSCR(flags)) { 96551078Speter u_char scr; 96651078Speter u_char scr1; 96751078Speter u_char scr2; 96851078Speter 96960471Snyan scr = sio_getreg(com, com_scr); 97060471Snyan sio_setreg(com, com_scr, 0xa5); 97160471Snyan scr1 = sio_getreg(com, com_scr); 97260471Snyan sio_setreg(com, com_scr, 0x5a); 97360471Snyan scr2 = sio_getreg(com, com_scr); 97460471Snyan sio_setreg(com, com_scr, scr); 97551078Speter if (scr1 != 0xa5 || scr2 != 0x5a) { 97689447Sbmah printf(" 8250 or not responding"); 97751078Speter goto determined_type; 97851078Speter } 97951078Speter } 98060471Snyan sio_setreg(com, com_fifo, FIFO_ENABLE | FIFO_RX_HIGH); 98151078Speter DELAY(100); 98251078Speter switch (inb(com->int_id_port) & IIR_FIFO_MASK) { 98351078Speter case FIFO_RX_LOW: 98451078Speter printf(" 16450"); 98551078Speter break; 98651078Speter case FIFO_RX_MEDL: 98751078Speter printf(" 16450?"); 98851078Speter break; 98951078Speter case FIFO_RX_MEDH: 99051078Speter printf(" 16550?"); 99151078Speter break; 99251078Speter case FIFO_RX_HIGH: 99351078Speter if (COM_NOFIFO(flags)) { 99451078Speter printf(" 16550A fifo disabled"); 995120173Sbde break; 99651078Speter } 997120173Sbde com->hasfifo = TRUE; 998120173Sbde if (COM_ST16650A(flags)) { 999120173Sbde printf(" ST16650A"); 1000120173Sbde com->st16650a = TRUE; 1001120173Sbde com->tx_fifo_size = 32; 1002120173Sbde break; 1003120173Sbde } 1004120173Sbde if (COM_TI16754(flags)) { 1005120173Sbde printf(" TI16754"); 1006120173Sbde com->tx_fifo_size = 64; 1007120173Sbde break; 1008120173Sbde } 1009120173Sbde printf(" 16550A"); 101051078Speter#ifdef COM_ESP 101151078Speter for (espp = likely_esp_ports; *espp != 0; espp++) 101251078Speter if (espattach(com, *espp)) { 101351078Speter com->tx_fifo_size = 1024; 101451078Speter break; 101551078Speter } 1016123796Sbde if (com->esp) 1017120173Sbde break; 101851078Speter#endif 1019120173Sbde com->tx_fifo_size = COM_FIFOSIZE(flags); 1020120173Sbde if (com->tx_fifo_size == 0) 1021120173Sbde com->tx_fifo_size = 16; 1022120173Sbde else 1023120173Sbde printf(" lookalike with %u bytes FIFO", 1024120173Sbde com->tx_fifo_size); 102551078Speter break; 102651078Speter } 102751078Speter#ifdef COM_ESP 1028123796Sbde if (com->esp) { 102951078Speter /* 103051078Speter * Set 16550 compatibility mode. 103151078Speter * We don't use the ESP_MODE_SCALE bit to increase the 103251078Speter * fifo trigger levels because we can't handle large 103351078Speter * bursts of input. 103451078Speter * XXX flow control should be set in comparam(), not here. 103551078Speter */ 103651078Speter outb(com->esp_port + ESP_CMD1, ESP_SETMODE); 103751078Speter outb(com->esp_port + ESP_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO); 103851078Speter 103951078Speter /* Set RTS/CTS flow control. */ 104051078Speter outb(com->esp_port + ESP_CMD1, ESP_SETFLOWTYPE); 104151078Speter outb(com->esp_port + ESP_CMD2, ESP_FLOW_RTS); 104251078Speter outb(com->esp_port + ESP_CMD2, ESP_FLOW_CTS); 104351078Speter 104451078Speter /* Set flow-control levels. */ 104551078Speter outb(com->esp_port + ESP_CMD1, ESP_SETRXFLOW); 104651078Speter outb(com->esp_port + ESP_CMD2, HIBYTE(768)); 104751078Speter outb(com->esp_port + ESP_CMD2, LOBYTE(768)); 104851078Speter outb(com->esp_port + ESP_CMD2, HIBYTE(512)); 104951078Speter outb(com->esp_port + ESP_CMD2, LOBYTE(512)); 105051078Speter } 105151078Speter#endif /* COM_ESP */ 105260471Snyan sio_setreg(com, com_fifo, 0); 105351078Speterdetermined_type: ; 105451078Speter 105551078Speter#ifdef COM_MULTIPORT 105651078Speter if (COM_ISMULTIPORT(flags)) { 105753344Speter device_t masterdev; 105853344Speter 105951078Speter com->multiport = TRUE; 106051078Speter printf(" (multiport"); 106151078Speter if (unit == COM_MPMASTER(flags)) 106251078Speter printf(" master"); 106351078Speter printf(")"); 106453344Speter masterdev = devclass_get_device(sio_devclass, 106553344Speter COM_MPMASTER(flags)); 106657234Sbde com->no_irq = (masterdev == NULL || bus_get_resource(masterdev, 106757234Sbde SYS_RES_IRQ, 0, NULL, NULL) != 0); 106851078Speter } 106951078Speter#endif /* COM_MULTIPORT */ 107051078Speter if (unit == comconsole) 107151078Speter printf(", console"); 107253344Speter if (COM_IIR_TXRDYBUG(flags)) 1073120189Sbde printf(" with a buggy IIR_TXRDY implementation"); 107451078Speter printf("\n"); 107551078Speter 107667551Sjhb if (sio_fast_ih == NULL) { 1077151658Sjhb swi_add(&tty_intr_event, "sio", siopoll, NULL, SWI_TTY, 0, 107872238Sjhb &sio_fast_ih); 1079151658Sjhb swi_add(&clk_intr_event, "sio", siopoll, NULL, SWI_CLOCK, 0, 108072238Sjhb &sio_slow_ih); 108151078Speter } 1082136478Sphk 108351078Speter com->flags = flags; 108451078Speter com->pps.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR; 1085136478Sphk tp->t_pps = &com->pps; 1086111613Sphk 1087111613Sphk if (COM_PPSCTS(flags)) 1088111613Sphk com->pps_bit = MSR_CTS; 1089111613Sphk else 1090111613Sphk com->pps_bit = MSR_DCD; 109151078Speter pps_init(&com->pps); 109251078Speter 109351078Speter rid = 0; 1094127135Snjl com->irqres = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE); 109553344Speter if (com->irqres) { 1096155921Sjhb ret = bus_setup_intr(dev, com->irqres, 1097166901Spiso INTR_TYPE_TTY, 1098166901Spiso siointr, NULL, com, 1099166901Spiso &com->cookie); 110054194Speter if (ret) { 1101155921Sjhb ret = bus_setup_intr(dev, 110254194Speter com->irqres, INTR_TYPE_TTY, 1103166901Spiso NULL, (driver_intr_t *)siointr, com, &com->cookie); 110454194Speter if (ret == 0) 110583246Sdd device_printf(dev, "unable to activate interrupt in fast mode - using normal mode\n"); 110654194Speter } 110753344Speter if (ret) 110853344Speter device_printf(dev, "could not activate interrupt\n"); 1109225203Srwatson#if defined(KDB) 111078504Siedowse /* 111178504Siedowse * Enable interrupts for early break-to-debugger support 1112127157Snjl * on the console. 111378504Siedowse */ 1114127157Snjl if (ret == 0 && unit == comconsole) 111578504Siedowse outb(siocniobase + com_ier, IER_ERXRDY | IER_ERLS | 111678504Siedowse IER_EMSC); 111778504Siedowse#endif 111853344Speter } 111951078Speter 1120136478Sphk /* We're ready, open the doors... */ 1121151383Sphk ttycreate(tp, TS_CALLOUT, "d%r", unit); 112251078Speter 1123130872Sphk return (0); 1124130872Sphk} 1125130872Sphk 1126130872Sphkstatic int 1127136478Sphkcomopen(struct tty *tp, struct cdev *dev) 112851078Speter{ 112951078Speter struct com_s *com; 1130136478Sphk int i; 113151078Speter 1132136478Sphk com = tp->t_sc; 1133136478Sphk com->poll = com->no_irq; 1134136478Sphk com->poll_output = com->loses_outints; 1135136478Sphk if (com->hasfifo) { 113651078Speter /* 1137136478Sphk * (Re)enable and drain fifos. 1138136478Sphk * 1139136478Sphk * Certain SMC chips cause problems if the fifos 1140136478Sphk * are enabled while input is ready. Turn off the 1141136478Sphk * fifo if necessary to clear the input. We test 1142136478Sphk * the input ready bit after enabling the fifos 1143136478Sphk * since we've already enabled them in comparam() 1144136478Sphk * and to handle races between enabling and fresh 1145136478Sphk * input. 114651078Speter */ 1147136478Sphk for (i = 0; i < 500; i++) { 1148136478Sphk sio_setreg(com, com_fifo, 1149136478Sphk FIFO_RCV_RST | FIFO_XMT_RST 1150136478Sphk | com->fifo_image); 115151078Speter /* 1152136478Sphk * XXX the delays are for superstitious 1153136478Sphk * historical reasons. It must be less than 1154136478Sphk * the character time at the maximum 1155136478Sphk * supported speed (87 usec at 115200 bps 1156136478Sphk * 8N1). Otherwise we might loop endlessly 1157136478Sphk * if data is streaming in. We used to use 1158136478Sphk * delays of 100. That usually worked 1159136478Sphk * because DELAY(100) used to usually delay 1160136478Sphk * for about 85 usec instead of 100. 116151078Speter */ 1162136478Sphk DELAY(50); 1163136478Sphk if (!(inb(com->line_status_port) & LSR_RXRDY)) 1164136478Sphk break; 1165136478Sphk sio_setreg(com, com_fifo, 0); 1166136478Sphk DELAY(50); 1167136478Sphk (void) inb(com->data_port); 116851078Speter } 1169136478Sphk if (i == 500) 1170136478Sphk return (EIO); 117151078Speter } 117251078Speter 1173136478Sphk mtx_lock_spin(&sio_lock); 1174136478Sphk (void) inb(com->line_status_port); 1175136478Sphk (void) inb(com->data_port); 1176136478Sphk com->prev_modem_status = com->last_modem_status 1177136478Sphk = inb(com->modem_status_port); 1178136478Sphk outb(com->int_ctl_port, 1179136478Sphk IER_ERXRDY | IER_ERLS | IER_EMSC 1180136478Sphk | (COM_IIR_TXRDYBUG(com->flags) ? 0 : IER_ETXRDY)); 1181136478Sphk mtx_unlock_spin(&sio_lock); 118251078Speter siosettimeout(); 1183136478Sphk /* XXX: should be generic ? */ 1184136478Sphk if (com->prev_modem_status & MSR_DCD || ISCALLOUT(dev)) 1185136478Sphk ttyld_modem(tp, 1); 118651078Speter return (0); 118751078Speter} 118851078Speter 118951078Speterstatic void 1190136478Sphkcomclose(tp) 1191136478Sphk struct tty *tp; 119251078Speter{ 119351078Speter int s; 1194136478Sphk struct com_s *com; 119551078Speter 119651078Speter s = spltty(); 1197136478Sphk com = tp->t_sc; 119851078Speter com->poll = FALSE; 119951078Speter com->poll_output = FALSE; 120060471Snyan sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 120178504Siedowse 1202225203Srwatson#if defined(KDB) 120378504Siedowse /* 120478504Siedowse * Leave interrupts enabled and don't clear DTR if this is the 120578504Siedowse * console. This allows us to detect break-to-debugger events 120678504Siedowse * while the console device is closed. 120778504Siedowse */ 1208127157Snjl if (com->unit != comconsole) 120978504Siedowse#endif 121051078Speter { 121160471Snyan sio_setreg(com, com_ier, 0); 121251078Speter if (tp->t_cflag & HUPCL 121351078Speter /* 121451078Speter * XXX we will miss any carrier drop between here and the 121551078Speter * next open. Perhaps we should watch DCD even when the 121651078Speter * port is closed; it is not sufficient to check it at 121751078Speter * the next open because it might go up and down while 121851078Speter * we're not watching. 121951078Speter */ 1220136478Sphk || (!tp->t_actout 122151078Speter && !(com->prev_modem_status & MSR_DCD) 1222135329Sphk && !(tp->t_init_in.c_cflag & CLOCAL)) 122351078Speter || !(tp->t_state & TS_ISOPEN)) { 1224131094Sphk (void)commodem(tp, 0, SER_DTR); 1225131981Sphk ttydtrwaitstart(tp); 122651078Speter } 122751078Speter } 122851078Speter if (com->hasfifo) { 122951078Speter /* 123051078Speter * Disable fifos so that they are off after controlled 123151078Speter * reboots. Some BIOSes fail to detect 16550s when the 123251078Speter * fifos are enabled. 123351078Speter */ 123460471Snyan sio_setreg(com, com_fifo, 0); 123551078Speter } 1236136478Sphk tp->t_actout = FALSE; 1237136478Sphk wakeup(&tp->t_actout); 123851078Speter wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */ 1239136478Sphk siosettimeout(); 124051078Speter splx(s); 124151078Speter} 124251078Speter 124351078Speterstatic void 124451078Spetersiobusycheck(chan) 124551078Speter void *chan; 124651078Speter{ 124751078Speter struct com_s *com; 124851078Speter int s; 124951078Speter 125051078Speter com = (struct com_s *)chan; 125151078Speter 125251078Speter /* 125351078Speter * Clear TS_BUSY if low-level output is complete. 125451078Speter * spl locking is sufficient because siointr1() does not set CS_BUSY. 125551078Speter * If siointr1() clears CS_BUSY after we look at it, then we'll get 125651078Speter * called again. Reading the line status port outside of siointr1() 125751078Speter * is safe because CS_BUSY is clear so there are no output interrupts 125851078Speter * to lose. 125951078Speter */ 126051078Speter s = spltty(); 126151078Speter if (com->state & CS_BUSY) 126251078Speter com->extra_state &= ~CSE_BUSYCHECK; /* False alarm. */ 126351078Speter else if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) 126451078Speter == (LSR_TSRE | LSR_TXRDY)) { 126551078Speter com->tp->t_state &= ~TS_BUSY; 126651078Speter ttwwakeup(com->tp); 126751078Speter com->extra_state &= ~CSE_BUSYCHECK; 126851078Speter } else 126951078Speter timeout(siobusycheck, com, hz / 100); 127051078Speter splx(s); 127151078Speter} 127251078Speter 127389986Sjhaystatic u_int 127489986Sjhaysiodivisor(rclk, speed) 127589986Sjhay u_long rclk; 127689986Sjhay speed_t speed; 127789986Sjhay{ 127889986Sjhay long actual_speed; 127989986Sjhay u_int divisor; 128089986Sjhay int error; 128189986Sjhay 1282114334Speter if (speed == 0) 128389986Sjhay return (0); 1284114334Speter#if UINT_MAX > (ULONG_MAX - 1) / 8 1285114334Speter if (speed > (ULONG_MAX - 1) / 8) 1286114334Speter return (0); 1287114334Speter#endif 128889986Sjhay divisor = (rclk / (8UL * speed) + 1) / 2; 128989986Sjhay if (divisor == 0 || divisor >= 65536) 129089986Sjhay return (0); 129189986Sjhay actual_speed = rclk / (16UL * divisor); 129289986Sjhay 129389986Sjhay /* 10 times error in percent: */ 129489986Sjhay error = ((actual_speed - (long)speed) * 2000 / (long)speed + 1) / 2; 129589986Sjhay 129689986Sjhay /* 3.0% maximum error tolerance: */ 129789986Sjhay if (error < -30 || error > 30) 129889986Sjhay return (0); 129989986Sjhay 130089986Sjhay return (divisor); 130189986Sjhay} 130289986Sjhay 130365557Sjasone/* 130470174Sjhb * Call this function with the sio_lock mutex held. It will return with the 130570174Sjhb * lock still held. 130665557Sjasone */ 130751078Speterstatic void 130851078Spetersioinput(com) 130951078Speter struct com_s *com; 131051078Speter{ 131151078Speter u_char *buf; 131251078Speter int incc; 131351078Speter u_char line_status; 131451078Speter int recv_data; 131551078Speter struct tty *tp; 131651078Speter 131751078Speter buf = com->ibuf; 131851078Speter tp = com->tp; 131951078Speter if (!(tp->t_state & TS_ISOPEN) || !(tp->t_cflag & CREAD)) { 132051078Speter com_events -= (com->iptr - com->ibuf); 132151078Speter com->iptr = com->ibuf; 132251078Speter return; 132351078Speter } 132451078Speter if (tp->t_state & TS_CAN_BYPASS_L_RINT) { 132551078Speter /* 132651078Speter * Avoid the grotesquely inefficient lineswitch routine 132751078Speter * (ttyinput) in "raw" mode. It usually takes about 450 132851078Speter * instructions (that's without canonical processing or echo!). 132951078Speter * slinput is reasonably fast (usually 40 instructions plus 133051078Speter * call overhead). 133151078Speter */ 133251078Speter do { 133365557Sjasone /* 133465557Sjasone * This may look odd, but it is using save-and-enable 133565557Sjasone * semantics instead of the save-and-disable semantics 133665557Sjasone * that are used everywhere else. 133765557Sjasone */ 133872200Sbmilekic mtx_unlock_spin(&sio_lock); 133951078Speter incc = com->iptr - buf; 134051078Speter if (tp->t_rawq.c_cc + incc > tp->t_ihiwat 134151078Speter && (com->state & CS_RTS_IFLOW 134251078Speter || tp->t_iflag & IXOFF) 134351078Speter && !(tp->t_state & TS_TBLOCK)) 134451078Speter ttyblock(tp); 134551078Speter com->delta_error_counts[CE_TTY_BUF_OVERFLOW] 134651078Speter += b_to_q((char *)buf, incc, &tp->t_rawq); 134751078Speter buf += incc; 134851078Speter tk_nin += incc; 134951078Speter tk_rawcc += incc; 135051078Speter tp->t_rawcc += incc; 135151078Speter ttwakeup(tp); 135251078Speter if (tp->t_state & TS_TTSTOP 135351078Speter && (tp->t_iflag & IXANY 135451078Speter || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) { 135551078Speter tp->t_state &= ~TS_TTSTOP; 135651078Speter tp->t_lflag &= ~FLUSHO; 135751078Speter comstart(tp); 135851078Speter } 135972200Sbmilekic mtx_lock_spin(&sio_lock); 136051078Speter } while (buf < com->iptr); 136151078Speter } else { 136251078Speter do { 136365557Sjasone /* 136465557Sjasone * This may look odd, but it is using save-and-enable 136565557Sjasone * semantics instead of the save-and-disable semantics 136665557Sjasone * that are used everywhere else. 136765557Sjasone */ 136872200Sbmilekic mtx_unlock_spin(&sio_lock); 136951078Speter line_status = buf[com->ierroff]; 137051078Speter recv_data = *buf++; 137151078Speter if (line_status 137251078Speter & (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) { 137351078Speter if (line_status & LSR_BI) 137451078Speter recv_data |= TTY_BI; 137551078Speter if (line_status & LSR_FE) 137651078Speter recv_data |= TTY_FE; 137751078Speter if (line_status & LSR_OE) 137851078Speter recv_data |= TTY_OE; 137951078Speter if (line_status & LSR_PE) 138051078Speter recv_data |= TTY_PE; 138151078Speter } 1382130077Sphk ttyld_rint(tp, recv_data); 138372200Sbmilekic mtx_lock_spin(&sio_lock); 138451078Speter } while (buf < com->iptr); 138551078Speter } 138651078Speter com_events -= (com->iptr - com->ibuf); 138751078Speter com->iptr = com->ibuf; 138851078Speter 138951078Speter /* 139051078Speter * There is now room for another low-level buffer full of input, 139151078Speter * so enable RTS if it is now disabled and there is room in the 139251078Speter * high-level buffer. 139351078Speter */ 139451078Speter if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & MCR_RTS) && 139551078Speter !(tp->t_state & TS_TBLOCK)) 139651078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 139751078Speter} 139851078Speter 1399166901Spisostatic int 140051078Spetersiointr(arg) 140151078Speter void *arg; 140251078Speter{ 140370174Sjhb struct com_s *com; 140470174Sjhb 140551078Speter#ifndef COM_MULTIPORT 140670174Sjhb com = (struct com_s *)arg; 140770174Sjhb 140872200Sbmilekic mtx_lock_spin(&sio_lock); 140970174Sjhb siointr1(com); 141072200Sbmilekic mtx_unlock_spin(&sio_lock); 141151078Speter#else /* COM_MULTIPORT */ 141251078Speter bool_t possibly_more_intrs; 141351078Speter int unit; 141451078Speter 141551078Speter /* 141651078Speter * Loop until there is no activity on any port. This is necessary 141751078Speter * to get an interrupt edge more than to avoid another interrupt. 141851078Speter * If the IRQ signal is just an OR of the IRQ signals from several 141951078Speter * devices, then the edge from one may be lost because another is 142051078Speter * on. 142151078Speter */ 142272200Sbmilekic mtx_lock_spin(&sio_lock); 142351078Speter do { 142451078Speter possibly_more_intrs = FALSE; 142553344Speter for (unit = 0; unit < sio_numunits; ++unit) { 142651078Speter com = com_addr(unit); 142751078Speter /* 142851078Speter * XXX COM_LOCK(); 142951078Speter * would it work here, or be counter-productive? 143051078Speter */ 143151078Speter if (com != NULL 143251078Speter && !com->gone 143351078Speter && (inb(com->int_id_port) & IIR_IMASK) 143451078Speter != IIR_NOPEND) { 143551078Speter siointr1(com); 143651078Speter possibly_more_intrs = TRUE; 143751078Speter } 143851078Speter /* XXX COM_UNLOCK(); */ 143951078Speter } 144051078Speter } while (possibly_more_intrs); 144172200Sbmilekic mtx_unlock_spin(&sio_lock); 144251078Speter#endif /* COM_MULTIPORT */ 1443166901Spiso return(FILTER_HANDLED); 144451078Speter} 144551078Speter 1446122819Sbdestatic struct timespec siots[8]; 144793466Sbdestatic int siotso; 144893466Sbdestatic int volatile siotsunit = -1; 144993466Sbde 145093466Sbdestatic int 145193466Sbdesysctl_siots(SYSCTL_HANDLER_ARGS) 145293466Sbde{ 145393466Sbde char buf[128]; 145493466Sbde long long delta; 145593466Sbde size_t len; 1456122819Sbde int error, i, tso; 145793466Sbde 1458122819Sbde for (i = 1, tso = siotso; i < tso; i++) { 145993466Sbde delta = (long long)(siots[i].tv_sec - siots[i - 1].tv_sec) * 146093466Sbde 1000000000 + 146193466Sbde (siots[i].tv_nsec - siots[i - 1].tv_nsec); 146293466Sbde len = sprintf(buf, "%lld\n", delta); 146393466Sbde if (delta >= 110000) 146493466Sbde len += sprintf(buf + len - 1, ": *** %ld.%09ld\n", 1465122819Sbde (long)siots[i].tv_sec, siots[i].tv_nsec) - 1; 1466122819Sbde if (i == tso - 1) 146793466Sbde buf[len - 1] = '\0'; 146893466Sbde error = SYSCTL_OUT(req, buf, len); 146993466Sbde if (error != 0) 147093466Sbde return (error); 147193466Sbde } 147293466Sbde return (0); 147393466Sbde} 147493466Sbde 147593466SbdeSYSCTL_PROC(_machdep, OID_AUTO, siots, CTLTYPE_STRING | CTLFLAG_RD, 147693466Sbde 0, 0, sysctl_siots, "A", "sio timestamps"); 147793466Sbde 147851078Speterstatic void 147951078Spetersiointr1(com) 148051078Speter struct com_s *com; 148151078Speter{ 1482120189Sbde u_char int_ctl; 1483120189Sbde u_char int_ctl_new; 148451078Speter u_char line_status; 148551078Speter u_char modem_status; 148651078Speter u_char *ioptr; 148751078Speter u_char recv_data; 148851078Speter 1489225203Srwatson#ifdef KDB 1490178766Speteragain: 1491178766Speter#endif 1492178766Speter 1493120091Sbde if (COM_IIR_TXRDYBUG(com->flags)) { 1494120189Sbde int_ctl = inb(com->int_ctl_port); 1495120091Sbde int_ctl_new = int_ctl; 1496120091Sbde } else { 1497120091Sbde int_ctl = 0; 1498120091Sbde int_ctl_new = 0; 1499120091Sbde } 150051078Speter 150151078Speter while (!com->gone) { 150251078Speter if (com->pps.ppsparam.mode & PPS_CAPTUREBOTH) { 150351078Speter modem_status = inb(com->modem_status_port); 1504111613Sphk if ((modem_status ^ com->last_modem_status) & 1505111613Sphk com->pps_bit) { 150695523Sphk pps_capture(&com->pps); 1507111613Sphk pps_event(&com->pps, 1508111616Sphk (modem_status & com->pps_bit) ? 150951078Speter PPS_CAPTUREASSERT : PPS_CAPTURECLEAR); 151051078Speter } 151151078Speter } 151251078Speter line_status = inb(com->line_status_port); 1513128020Simp 151451078Speter /* input event? (check first to help avoid overruns) */ 151551078Speter while (line_status & LSR_RCV_MASK) { 151651078Speter /* break/unnattached error bits or real input? */ 151751078Speter if (!(line_status & LSR_RXRDY)) 151851078Speter recv_data = 0; 151951078Speter else 152051078Speter recv_data = inb(com->data_port); 1521131939Smarcel#ifdef KDB 1522119485Snjl if (com->unit == comconsole && 1523225203Srwatson kdb_alt_break(recv_data, &com->alt_brk_state) != 0) 1524178766Speter goto again; 1525131939Smarcel#endif /* KDB */ 152651078Speter if (line_status & (LSR_BI | LSR_FE | LSR_PE)) { 152751078Speter /* 152851078Speter * Don't store BI if IGNBRK or FE/PE if IGNPAR. 152951078Speter * Otherwise, push the work to a higher level 153051078Speter * (to handle PARMRK) if we're bypassing. 153151078Speter * Otherwise, convert BI/FE and PE+INPCK to 0. 153251078Speter * 153351078Speter * This makes bypassing work right in the 153451078Speter * usual "raw" case (IGNBRK set, and IGNPAR 153551078Speter * and INPCK clear). 153651078Speter * 153751078Speter * Note: BI together with FE/PE means just BI. 153851078Speter */ 153951078Speter if (line_status & LSR_BI) { 1540225203Srwatson#if defined(KDB) 154151078Speter if (com->unit == comconsole) { 1542225203Srwatson kdb_break(); 154351078Speter goto cont; 154451078Speter } 154551078Speter#endif 154651078Speter if (com->tp == NULL 154751078Speter || com->tp->t_iflag & IGNBRK) 154851078Speter goto cont; 154951078Speter } else { 155051078Speter if (com->tp == NULL 155151078Speter || com->tp->t_iflag & IGNPAR) 155251078Speter goto cont; 155351078Speter } 155451078Speter if (com->tp->t_state & TS_CAN_BYPASS_L_RINT 155551078Speter && (line_status & (LSR_BI | LSR_FE) 155651078Speter || com->tp->t_iflag & INPCK)) 155751078Speter recv_data = 0; 155851078Speter } 155951078Speter ++com->bytes_in; 1560131185Sphk if (com->tp != NULL && 1561131185Sphk com->tp->t_hotchar != 0 && recv_data == com->tp->t_hotchar) 156288900Sjhb swi_sched(sio_fast_ih, 0); 156351078Speter ioptr = com->iptr; 156451078Speter if (ioptr >= com->ibufend) 156551078Speter CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW); 156651078Speter else { 1567136478Sphk if (com->tp != NULL && com->tp->t_do_timestamp) 1568136478Sphk microtime(&com->tp->t_timestamp); 156951078Speter ++com_events; 157072238Sjhb swi_sched(sio_slow_ih, SWI_DELAY); 157151078Speter#if 0 /* for testing input latency vs efficiency */ 157251078Speterif (com->iptr - com->ibuf == 8) 157388900Sjhb swi_sched(sio_fast_ih, 0); 157451078Speter#endif 157551078Speter ioptr[0] = recv_data; 157651078Speter ioptr[com->ierroff] = line_status; 157751078Speter com->iptr = ++ioptr; 157851078Speter if (ioptr == com->ihighwater 157951078Speter && com->state & CS_RTS_IFLOW) 158051078Speter outb(com->modem_ctl_port, 158151078Speter com->mcr_image &= ~MCR_RTS); 158251078Speter if (line_status & LSR_OE) 158351078Speter CE_RECORD(com, CE_OVERRUN); 158451078Speter } 158551078Spetercont: 1586122844Sbde if (line_status & LSR_TXRDY 1587122844Sbde && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) 1588122844Sbde goto txrdy; 1589122844Sbde 159051078Speter /* 159151078Speter * "& 0x7F" is to avoid the gcc-1.40 generating a slow 159251078Speter * jump from the top of the loop to here 159351078Speter */ 159451078Speter line_status = inb(com->line_status_port) & 0x7F; 159551078Speter } 159651078Speter 159751078Speter /* modem status change? (always check before doing output) */ 159851078Speter modem_status = inb(com->modem_status_port); 159951078Speter if (modem_status != com->last_modem_status) { 160051078Speter /* 160151078Speter * Schedule high level to handle DCD changes. Note 160251078Speter * that we don't use the delta bits anywhere. Some 160351078Speter * UARTs mess them up, and it's easy to remember the 160451078Speter * previous bits and calculate the delta. 160551078Speter */ 160651078Speter com->last_modem_status = modem_status; 160751078Speter if (!(com->state & CS_CHECKMSR)) { 160851078Speter com_events += LOTS_OF_EVENTS; 160951078Speter com->state |= CS_CHECKMSR; 161088900Sjhb swi_sched(sio_fast_ih, 0); 161151078Speter } 161251078Speter 161351078Speter /* handle CTS change immediately for crisp flow ctl */ 161451078Speter if (com->state & CS_CTS_OFLOW) { 161551078Speter if (modem_status & MSR_CTS) 161651078Speter com->state |= CS_ODEVREADY; 161751078Speter else 161851078Speter com->state &= ~CS_ODEVREADY; 161951078Speter } 162051078Speter } 162151078Speter 1622122844Sbdetxrdy: 162351078Speter /* output queued and everything ready? */ 162451078Speter if (line_status & LSR_TXRDY 162551078Speter && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { 162651078Speter ioptr = com->obufq.l_head; 162793466Sbde if (com->tx_fifo_size > 1 && com->unit != siotsunit) { 162851078Speter u_int ocount; 162951078Speter 163051078Speter ocount = com->obufq.l_tail - ioptr; 163151078Speter if (ocount > com->tx_fifo_size) 163251078Speter ocount = com->tx_fifo_size; 163351078Speter com->bytes_out += ocount; 163451078Speter do 163551078Speter outb(com->data_port, *ioptr++); 163651078Speter while (--ocount != 0); 163751078Speter } else { 163851078Speter outb(com->data_port, *ioptr++); 163951078Speter ++com->bytes_out; 1640122819Sbde if (com->unit == siotsunit 1641122819Sbde && siotso < sizeof siots / sizeof siots[0]) 1642122819Sbde nanouptime(&siots[siotso++]); 164351078Speter } 164451078Speter com->obufq.l_head = ioptr; 1645120189Sbde if (COM_IIR_TXRDYBUG(com->flags)) 164651078Speter int_ctl_new = int_ctl | IER_ETXRDY; 164751078Speter if (ioptr >= com->obufq.l_tail) { 164851078Speter struct lbq *qp; 164951078Speter 165051078Speter qp = com->obufq.l_next; 165151078Speter qp->l_queued = FALSE; 165251078Speter qp = qp->l_next; 165351078Speter if (qp != NULL) { 165451078Speter com->obufq.l_head = qp->l_head; 165551078Speter com->obufq.l_tail = qp->l_tail; 165651078Speter com->obufq.l_next = qp; 165751078Speter } else { 165851078Speter /* output just completed */ 1659120189Sbde if (COM_IIR_TXRDYBUG(com->flags)) 1660120189Sbde int_ctl_new = int_ctl 1661120189Sbde & ~IER_ETXRDY; 166251078Speter com->state &= ~CS_BUSY; 166351078Speter } 166451078Speter if (!(com->state & CS_ODONE)) { 166551078Speter com_events += LOTS_OF_EVENTS; 166651078Speter com->state |= CS_ODONE; 166767551Sjhb /* handle at high level ASAP */ 166888900Sjhb swi_sched(sio_fast_ih, 0); 166951078Speter } 167051078Speter } 1671120189Sbde if (COM_IIR_TXRDYBUG(com->flags) 1672120189Sbde && int_ctl != int_ctl_new) 1673120189Sbde outb(com->int_ctl_port, int_ctl_new); 167451078Speter } 167551078Speter 167651078Speter /* finished? */ 167751078Speter#ifndef COM_MULTIPORT 167851078Speter if ((inb(com->int_id_port) & IIR_IMASK) == IIR_NOPEND) 167951078Speter#endif /* COM_MULTIPORT */ 168051078Speter return; 168151078Speter } 168251078Speter} 168351078Speter 168465557Sjasone/* software interrupt handler for SWI_TTY */ 168551078Speterstatic void 168667551Sjhbsiopoll(void *dummy) 168751078Speter{ 168851078Speter int unit; 168951078Speter 169051078Speter if (com_events == 0) 169151078Speter return; 169251078Speterrepeat: 169353344Speter for (unit = 0; unit < sio_numunits; ++unit) { 169451078Speter struct com_s *com; 169551078Speter int incc; 169651078Speter struct tty *tp; 169751078Speter 169851078Speter com = com_addr(unit); 169951078Speter if (com == NULL) 170051078Speter continue; 170151078Speter tp = com->tp; 170251078Speter if (tp == NULL || com->gone) { 170351078Speter /* 170451078Speter * Discard any events related to never-opened or 170551078Speter * going-away devices. 170651078Speter */ 170772200Sbmilekic mtx_lock_spin(&sio_lock); 170851078Speter incc = com->iptr - com->ibuf; 170951078Speter com->iptr = com->ibuf; 171051078Speter if (com->state & CS_CHECKMSR) { 171151078Speter incc += LOTS_OF_EVENTS; 171251078Speter com->state &= ~CS_CHECKMSR; 171351078Speter } 171451078Speter com_events -= incc; 171572200Sbmilekic mtx_unlock_spin(&sio_lock); 171651078Speter continue; 171751078Speter } 171851078Speter if (com->iptr != com->ibuf) { 171972200Sbmilekic mtx_lock_spin(&sio_lock); 172051078Speter sioinput(com); 172172200Sbmilekic mtx_unlock_spin(&sio_lock); 172251078Speter } 172351078Speter if (com->state & CS_CHECKMSR) { 172451078Speter u_char delta_modem_status; 172551078Speter 172672200Sbmilekic mtx_lock_spin(&sio_lock); 172751078Speter delta_modem_status = com->last_modem_status 172851078Speter ^ com->prev_modem_status; 172951078Speter com->prev_modem_status = com->last_modem_status; 173051078Speter com_events -= LOTS_OF_EVENTS; 173151078Speter com->state &= ~CS_CHECKMSR; 173272200Sbmilekic mtx_unlock_spin(&sio_lock); 173351078Speter if (delta_modem_status & MSR_DCD) 1734130095Sphk ttyld_modem(tp, 1735130095Sphk com->prev_modem_status & MSR_DCD); 173651078Speter } 173751078Speter if (com->state & CS_ODONE) { 173872200Sbmilekic mtx_lock_spin(&sio_lock); 173951078Speter com_events -= LOTS_OF_EVENTS; 174051078Speter com->state &= ~CS_ODONE; 174172200Sbmilekic mtx_unlock_spin(&sio_lock); 174251078Speter if (!(com->state & CS_BUSY) 174351078Speter && !(com->extra_state & CSE_BUSYCHECK)) { 174451078Speter timeout(siobusycheck, com, hz / 100); 174551078Speter com->extra_state |= CSE_BUSYCHECK; 174651078Speter } 1747130077Sphk ttyld_start(tp); 174851078Speter } 174951078Speter if (com_events == 0) 175051078Speter break; 175151078Speter } 175251078Speter if (com_events >= LOTS_OF_EVENTS) 175351078Speter goto repeat; 175451078Speter} 175551078Speter 1756131373Sphkstatic void 1757131094Sphkcombreak(tp, sig) 1758131094Sphk struct tty *tp; 1759131094Sphk int sig; 1760131094Sphk{ 1761131094Sphk struct com_s *com; 1762131094Sphk 1763135329Sphk com = tp->t_sc; 1764131094Sphk 1765131094Sphk if (sig) 1766131094Sphk sio_setreg(com, com_cfcr, com->cfcr_image |= CFCR_SBREAK); 1767131094Sphk else 1768131094Sphk sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 1769131094Sphk} 1770131094Sphk 1771131094Sphkstatic int 177251078Spetercomparam(tp, t) 177351078Speter struct tty *tp; 177451078Speter struct termios *t; 177551078Speter{ 177651078Speter u_int cfcr; 177751078Speter int cflag; 177851078Speter struct com_s *com; 177989986Sjhay u_int divisor; 178051078Speter u_char dlbh; 178151078Speter u_char dlbl; 1782120159Sbde u_char efr_flowbits; 178351078Speter int s; 178451078Speter 1785135329Sphk com = tp->t_sc; 178689986Sjhay if (com == NULL) 178789986Sjhay return (ENODEV); 178889986Sjhay 178951078Speter /* check requested parameters */ 1790120505Sbde if (t->c_ispeed != (t->c_ospeed != 0 ? t->c_ospeed : tp->t_ospeed)) 1791120505Sbde return (EINVAL); 1792120505Sbde divisor = siodivisor(com->rclk, t->c_ispeed); 1793120505Sbde if (divisor == 0) 1794120505Sbde return (EINVAL); 179551078Speter 179651078Speter /* parameters are OK, convert them to the com struct and the device */ 179751078Speter s = spltty(); 1798120505Sbde if (t->c_ospeed == 0) 1799131094Sphk (void)commodem(tp, 0, SER_DTR); /* hang up line */ 180051078Speter else 1801131094Sphk (void)commodem(tp, SER_DTR, 0); 180251078Speter cflag = t->c_cflag; 180351078Speter switch (cflag & CSIZE) { 180451078Speter case CS5: 180551078Speter cfcr = CFCR_5BITS; 180651078Speter break; 180751078Speter case CS6: 180851078Speter cfcr = CFCR_6BITS; 180951078Speter break; 181051078Speter case CS7: 181151078Speter cfcr = CFCR_7BITS; 181251078Speter break; 181351078Speter default: 181451078Speter cfcr = CFCR_8BITS; 181551078Speter break; 181651078Speter } 181751078Speter if (cflag & PARENB) { 181851078Speter cfcr |= CFCR_PENAB; 181951078Speter if (!(cflag & PARODD)) 182051078Speter cfcr |= CFCR_PEVEN; 182151078Speter } 182251078Speter if (cflag & CSTOPB) 182351078Speter cfcr |= CFCR_STOPB; 182451078Speter 1825120505Sbde if (com->hasfifo) { 182651078Speter /* 182751078Speter * Use a fifo trigger level low enough so that the input 182851078Speter * latency from the fifo is less than about 16 msec and 182951078Speter * the total latency is less than about 30 msec. These 183051078Speter * latencies are reasonable for humans. Serial comms 183151078Speter * protocols shouldn't expect anything better since modem 183251078Speter * latencies are larger. 183388433Sdillon * 183488433Sdillon * The fifo trigger level cannot be set at RX_HIGH for high 183588433Sdillon * speed connections without further work on reducing 183688433Sdillon * interrupt disablement times in other parts of the system, 183788433Sdillon * without producing silo overflow errors. 183851078Speter */ 183993466Sbde com->fifo_image = com->unit == siotsunit ? 0 1840120505Sbde : t->c_ispeed <= 4800 184188451Stanimura ? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_MEDH; 184251078Speter#ifdef COM_ESP 184351078Speter /* 184451078Speter * The Hayes ESP card needs the fifo DMA mode bit set 184551078Speter * in compatibility mode. If not, it will interrupt 184651078Speter * for each character received. 184751078Speter */ 184851078Speter if (com->esp) 184951078Speter com->fifo_image |= FIFO_DMA_MODE; 185051078Speter#endif 185160471Snyan sio_setreg(com, com_fifo, com->fifo_image); 185251078Speter } 185351078Speter 185465605Sjhb /* 185565605Sjhb * This returns with interrupts disabled so that we can complete 185665605Sjhb * the speed change atomically. Keeping interrupts disabled is 185765605Sjhb * especially important while com_data is hidden. 185865605Sjhb */ 185965605Sjhb (void) siosetwater(com, t->c_ispeed); 186065557Sjasone 1861120505Sbde sio_setreg(com, com_cfcr, cfcr | CFCR_DLAB); 1862120505Sbde /* 1863120505Sbde * Only set the divisor registers if they would change, since on 1864120505Sbde * some 16550 incompatibles (UMC8669F), setting them while input 1865120505Sbde * is arriving loses sync until data stops arriving. 1866120505Sbde */ 1867120505Sbde dlbl = divisor & 0xFF; 1868120505Sbde if (sio_getreg(com, com_dlbl) != dlbl) 1869120505Sbde sio_setreg(com, com_dlbl, dlbl); 1870120505Sbde dlbh = divisor >> 8; 1871120505Sbde if (sio_getreg(com, com_dlbh) != dlbh) 1872120505Sbde sio_setreg(com, com_dlbh, dlbh); 187351078Speter 1874120159Sbde efr_flowbits = 0; 187551078Speter 187651078Speter if (cflag & CRTS_IFLOW) { 187751078Speter com->state |= CS_RTS_IFLOW; 1878120159Sbde efr_flowbits |= EFR_AUTORTS; 187951078Speter /* 188051078Speter * If CS_RTS_IFLOW just changed from off to on, the change 188151078Speter * needs to be propagated to MCR_RTS. This isn't urgent, 188251078Speter * so do it later by calling comstart() instead of repeating 188351078Speter * a lot of code from comstart() here. 188451078Speter */ 188551078Speter } else if (com->state & CS_RTS_IFLOW) { 188651078Speter com->state &= ~CS_RTS_IFLOW; 188751078Speter /* 188851078Speter * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS 188951078Speter * on here, since comstart() won't do it later. 189051078Speter */ 189151078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 189251078Speter } 189351078Speter 189451078Speter /* 189551078Speter * Set up state to handle output flow control. 189651078Speter * XXX - worth handling MDMBUF (DCD) flow control at the lowest level? 189751078Speter * Now has 10+ msec latency, while CTS flow has 50- usec latency. 189851078Speter */ 189951078Speter com->state |= CS_ODEVREADY; 190051078Speter com->state &= ~CS_CTS_OFLOW; 190151078Speter if (cflag & CCTS_OFLOW) { 190251078Speter com->state |= CS_CTS_OFLOW; 1903120159Sbde efr_flowbits |= EFR_AUTOCTS; 190451078Speter if (!(com->last_modem_status & MSR_CTS)) 190551078Speter com->state &= ~CS_ODEVREADY; 190651078Speter } 190751078Speter 1908120159Sbde if (com->st16650a) { 1909120159Sbde sio_setreg(com, com_lcr, LCR_EFR_ENABLE); 1910120159Sbde sio_setreg(com, com_efr, 1911120159Sbde (sio_getreg(com, com_efr) 1912120159Sbde & ~(EFR_AUTOCTS | EFR_AUTORTS)) | efr_flowbits); 1913120159Sbde } 1914120159Sbde sio_setreg(com, com_cfcr, com->cfcr_image = cfcr); 191551078Speter 191651078Speter /* XXX shouldn't call functions while intrs are disabled. */ 1917131134Sphk ttyldoptim(tp); 191851078Speter 191972200Sbmilekic mtx_unlock_spin(&sio_lock); 192051078Speter splx(s); 192151078Speter comstart(tp); 192251078Speter if (com->ibufold != NULL) { 192351078Speter free(com->ibufold, M_DEVBUF); 192451078Speter com->ibufold = NULL; 192551078Speter } 192651078Speter return (0); 192751078Speter} 192851078Speter 192965605Sjhb/* 193070174Sjhb * This function must be called with the sio_lock mutex released and will 193170174Sjhb * return with it obtained. 193265605Sjhb */ 193351078Speterstatic int 193465605Sjhbsiosetwater(com, speed) 193551078Speter struct com_s *com; 193651078Speter speed_t speed; 193751078Speter{ 193851078Speter int cp4ticks; 193951078Speter u_char *ibuf; 194051078Speter int ibufsize; 194151078Speter struct tty *tp; 194251078Speter 194351078Speter /* 194451078Speter * Make the buffer size large enough to handle a softtty interrupt 194551078Speter * latency of about 2 ticks without loss of throughput or data 194651078Speter * (about 3 ticks if input flow control is not used or not honoured, 194751078Speter * but a bit less for CS5-CS7 modes). 194851078Speter */ 194951078Speter cp4ticks = speed / 10 / hz * 4; 195051078Speter for (ibufsize = 128; ibufsize < cp4ticks;) 195151078Speter ibufsize <<= 1; 195265605Sjhb if (ibufsize == com->ibufsize) { 195372200Sbmilekic mtx_lock_spin(&sio_lock); 195451078Speter return (0); 195565605Sjhb } 195651078Speter 195751078Speter /* 195851078Speter * Allocate input buffer. The extra factor of 2 in the size is 195951078Speter * to allow for an error byte for each input byte. 196051078Speter */ 196151078Speter ibuf = malloc(2 * ibufsize, M_DEVBUF, M_NOWAIT); 196265605Sjhb if (ibuf == NULL) { 196372200Sbmilekic mtx_lock_spin(&sio_lock); 196451078Speter return (ENOMEM); 196565605Sjhb } 196651078Speter 196751078Speter /* Initialize non-critical variables. */ 196851078Speter com->ibufold = com->ibuf; 196951078Speter com->ibufsize = ibufsize; 197051078Speter tp = com->tp; 197151078Speter if (tp != NULL) { 197251078Speter tp->t_ififosize = 2 * ibufsize; 197351078Speter tp->t_ispeedwat = (speed_t)-1; 197451078Speter tp->t_ospeedwat = (speed_t)-1; 197551078Speter } 197651078Speter 197751078Speter /* 197851078Speter * Read current input buffer, if any. Continue with interrupts 197951078Speter * disabled. 198051078Speter */ 198172200Sbmilekic mtx_lock_spin(&sio_lock); 198251078Speter if (com->iptr != com->ibuf) 198351078Speter sioinput(com); 198451078Speter 198551078Speter /*- 198651078Speter * Initialize critical variables, including input buffer watermarks. 198751078Speter * The external device is asked to stop sending when the buffer 198851078Speter * exactly reaches high water, or when the high level requests it. 198951078Speter * The high level is notified immediately (rather than at a later 199051078Speter * clock tick) when this watermark is reached. 199151078Speter * The buffer size is chosen so the watermark should almost never 199251078Speter * be reached. 199351078Speter * The low watermark is invisibly 0 since the buffer is always 199451078Speter * emptied all at once. 199551078Speter */ 199651078Speter com->iptr = com->ibuf = ibuf; 199751078Speter com->ibufend = ibuf + ibufsize; 199851078Speter com->ierroff = ibufsize; 199951078Speter com->ihighwater = ibuf + 3 * ibufsize / 4; 200051078Speter return (0); 200151078Speter} 200251078Speter 200351078Speterstatic void 200451078Spetercomstart(tp) 200551078Speter struct tty *tp; 200651078Speter{ 200751078Speter struct com_s *com; 200851078Speter int s; 200951078Speter 2010135329Sphk com = tp->t_sc; 201157915Simp if (com == NULL) 201257915Simp return; 201351078Speter s = spltty(); 201472200Sbmilekic mtx_lock_spin(&sio_lock); 201551078Speter if (tp->t_state & TS_TTSTOP) 201651078Speter com->state &= ~CS_TTGO; 201751078Speter else 201851078Speter com->state |= CS_TTGO; 201951078Speter if (tp->t_state & TS_TBLOCK) { 202051078Speter if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW) 202151078Speter outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); 202251078Speter } else { 202351078Speter if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater 202451078Speter && com->state & CS_RTS_IFLOW) 202551078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 202651078Speter } 202772200Sbmilekic mtx_unlock_spin(&sio_lock); 202851078Speter if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { 202951078Speter ttwwakeup(tp); 203051078Speter splx(s); 203151078Speter return; 203251078Speter } 203351078Speter if (tp->t_outq.c_cc != 0) { 203451078Speter struct lbq *qp; 203551078Speter struct lbq *next; 203651078Speter 203751078Speter if (!com->obufs[0].l_queued) { 203851078Speter com->obufs[0].l_tail 203951078Speter = com->obuf1 + q_to_b(&tp->t_outq, com->obuf1, 204051078Speter sizeof com->obuf1); 204151078Speter com->obufs[0].l_next = NULL; 204251078Speter com->obufs[0].l_queued = TRUE; 204372200Sbmilekic mtx_lock_spin(&sio_lock); 204451078Speter if (com->state & CS_BUSY) { 204551078Speter qp = com->obufq.l_next; 204651078Speter while ((next = qp->l_next) != NULL) 204751078Speter qp = next; 204851078Speter qp->l_next = &com->obufs[0]; 204951078Speter } else { 205051078Speter com->obufq.l_head = com->obufs[0].l_head; 205151078Speter com->obufq.l_tail = com->obufs[0].l_tail; 205251078Speter com->obufq.l_next = &com->obufs[0]; 205351078Speter com->state |= CS_BUSY; 205451078Speter } 205572200Sbmilekic mtx_unlock_spin(&sio_lock); 205651078Speter } 205751078Speter if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) { 205851078Speter com->obufs[1].l_tail 205951078Speter = com->obuf2 + q_to_b(&tp->t_outq, com->obuf2, 206051078Speter sizeof com->obuf2); 206151078Speter com->obufs[1].l_next = NULL; 206251078Speter com->obufs[1].l_queued = TRUE; 206372200Sbmilekic mtx_lock_spin(&sio_lock); 206451078Speter if (com->state & CS_BUSY) { 206551078Speter qp = com->obufq.l_next; 206651078Speter while ((next = qp->l_next) != NULL) 206751078Speter qp = next; 206851078Speter qp->l_next = &com->obufs[1]; 206951078Speter } else { 207051078Speter com->obufq.l_head = com->obufs[1].l_head; 207151078Speter com->obufq.l_tail = com->obufs[1].l_tail; 207251078Speter com->obufq.l_next = &com->obufs[1]; 207351078Speter com->state |= CS_BUSY; 207451078Speter } 207572200Sbmilekic mtx_unlock_spin(&sio_lock); 207651078Speter } 207751078Speter tp->t_state |= TS_BUSY; 207851078Speter } 207972200Sbmilekic mtx_lock_spin(&sio_lock); 208051078Speter if (com->state >= (CS_BUSY | CS_TTGO)) 208151078Speter siointr1(com); /* fake interrupt to start output */ 208272200Sbmilekic mtx_unlock_spin(&sio_lock); 208351078Speter ttwwakeup(tp); 208451078Speter splx(s); 208551078Speter} 208651078Speter 208751078Speterstatic void 208851654Sphkcomstop(tp, rw) 208951078Speter struct tty *tp; 209051078Speter int rw; 209151078Speter{ 209251078Speter struct com_s *com; 209351078Speter 2094135329Sphk com = tp->t_sc; 209557915Simp if (com == NULL || com->gone) 209651078Speter return; 209772200Sbmilekic mtx_lock_spin(&sio_lock); 209851078Speter if (rw & FWRITE) { 209951078Speter if (com->hasfifo) 210051078Speter#ifdef COM_ESP 210151078Speter /* XXX avoid h/w bug. */ 210251078Speter if (!com->esp) 210351078Speter#endif 210460471Snyan sio_setreg(com, com_fifo, 210560471Snyan FIFO_XMT_RST | com->fifo_image); 210651078Speter com->obufs[0].l_queued = FALSE; 210751078Speter com->obufs[1].l_queued = FALSE; 210851078Speter if (com->state & CS_ODONE) 210951078Speter com_events -= LOTS_OF_EVENTS; 211051078Speter com->state &= ~(CS_ODONE | CS_BUSY); 211151078Speter com->tp->t_state &= ~TS_BUSY; 211251078Speter } 211351078Speter if (rw & FREAD) { 211451078Speter if (com->hasfifo) 211551078Speter#ifdef COM_ESP 211651078Speter /* XXX avoid h/w bug. */ 211751078Speter if (!com->esp) 211851078Speter#endif 211960471Snyan sio_setreg(com, com_fifo, 212060471Snyan FIFO_RCV_RST | com->fifo_image); 212151078Speter com_events -= (com->iptr - com->ibuf); 212251078Speter com->iptr = com->ibuf; 212351078Speter } 212472200Sbmilekic mtx_unlock_spin(&sio_lock); 212551078Speter comstart(tp); 212651078Speter} 212751078Speter 212851078Speterstatic int 2129136478Sphkcommodem(struct tty *tp, int sigon, int sigoff) 2130131094Sphk{ 213151078Speter struct com_s *com; 2132131094Sphk int bitand, bitor, msr; 213351078Speter 2134135329Sphk com = tp->t_sc; 2135131094Sphk if (com->gone) 2136131094Sphk return(0); 2137131094Sphk if (sigon != 0 || sigoff != 0) { 2138131094Sphk bitand = bitor = 0; 2139131094Sphk if (sigoff & SER_DTR) 2140131094Sphk bitand |= MCR_DTR; 2141131094Sphk if (sigoff & SER_RTS) 2142131094Sphk bitand |= MCR_RTS; 2143131094Sphk if (sigon & SER_DTR) 2144131094Sphk bitor |= MCR_DTR; 2145131094Sphk if (sigon & SER_RTS) 2146131094Sphk bitor |= MCR_RTS; 2147131094Sphk bitand = ~bitand; 2148131094Sphk mtx_lock_spin(&sio_lock); 2149131094Sphk com->mcr_image &= bitand; 2150131094Sphk com->mcr_image |= bitor; 2151131094Sphk outb(com->modem_ctl_port, com->mcr_image); 2152131094Sphk mtx_unlock_spin(&sio_lock); 2153131094Sphk return (0); 2154131094Sphk } else { 2155131094Sphk bitor = 0; 2156131094Sphk if (com->mcr_image & MCR_DTR) 2157131094Sphk bitor |= SER_DTR; 2158131094Sphk if (com->mcr_image & MCR_RTS) 2159131094Sphk bitor |= SER_RTS; 216051078Speter msr = com->prev_modem_status; 216151078Speter if (msr & MSR_CTS) 2162131094Sphk bitor |= SER_CTS; 216351078Speter if (msr & MSR_DCD) 2164131094Sphk bitor |= SER_DCD; 216551078Speter if (msr & MSR_DSR) 2166131094Sphk bitor |= SER_DSR; 2167131094Sphk if (msr & MSR_DSR) 2168131094Sphk bitor |= SER_DSR; 216951078Speter if (msr & (MSR_RI | MSR_TERI)) 2170131094Sphk bitor |= SER_RI; 2171131094Sphk return (bitor); 217251078Speter } 217351078Speter} 217451078Speter 217551078Speterstatic void 217651078Spetersiosettimeout() 217751078Speter{ 217851078Speter struct com_s *com; 217951078Speter bool_t someopen; 218051078Speter int unit; 218151078Speter 218251078Speter /* 218351078Speter * Set our timeout period to 1 second if no polled devices are open. 218451078Speter * Otherwise set it to max(1/200, 1/hz). 218551078Speter * Enable timeouts iff some device is open. 218651078Speter */ 218751078Speter untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 218851078Speter sio_timeout = hz; 218951078Speter someopen = FALSE; 219053344Speter for (unit = 0; unit < sio_numunits; ++unit) { 219151078Speter com = com_addr(unit); 219251078Speter if (com != NULL && com->tp != NULL 219351078Speter && com->tp->t_state & TS_ISOPEN && !com->gone) { 219451078Speter someopen = TRUE; 219551078Speter if (com->poll || com->poll_output) { 219651078Speter sio_timeout = hz > 200 ? hz / 200 : 1; 219751078Speter break; 219851078Speter } 219951078Speter } 220051078Speter } 220151078Speter if (someopen) { 220251078Speter sio_timeouts_until_log = hz / sio_timeout; 220351078Speter sio_timeout_handle = timeout(comwakeup, (void *)NULL, 220451078Speter sio_timeout); 220551078Speter } else { 220651078Speter /* Flush error messages, if any. */ 220751078Speter sio_timeouts_until_log = 1; 220851078Speter comwakeup((void *)NULL); 220951078Speter untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 221051078Speter } 221151078Speter} 221251078Speter 221351078Speterstatic void 221451078Spetercomwakeup(chan) 221551078Speter void *chan; 221651078Speter{ 221751078Speter struct com_s *com; 221851078Speter int unit; 221951078Speter 222051078Speter sio_timeout_handle = timeout(comwakeup, (void *)NULL, sio_timeout); 222151078Speter 222251078Speter /* 222351078Speter * Recover from lost output interrupts. 222451078Speter * Poll any lines that don't use interrupts. 222551078Speter */ 222653344Speter for (unit = 0; unit < sio_numunits; ++unit) { 222751078Speter com = com_addr(unit); 222851078Speter if (com != NULL && !com->gone 222951078Speter && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) { 223072200Sbmilekic mtx_lock_spin(&sio_lock); 223151078Speter siointr1(com); 223272200Sbmilekic mtx_unlock_spin(&sio_lock); 223351078Speter } 223451078Speter } 223551078Speter 223651078Speter /* 223751078Speter * Check for and log errors, but not too often. 223851078Speter */ 223951078Speter if (--sio_timeouts_until_log > 0) 224051078Speter return; 224151078Speter sio_timeouts_until_log = hz / sio_timeout; 224253344Speter for (unit = 0; unit < sio_numunits; ++unit) { 224351078Speter int errnum; 224451078Speter 224551078Speter com = com_addr(unit); 224651078Speter if (com == NULL) 224751078Speter continue; 224851078Speter if (com->gone) 224951078Speter continue; 225051078Speter for (errnum = 0; errnum < CE_NTYPES; ++errnum) { 225151078Speter u_int delta; 225251078Speter u_long total; 225351078Speter 225472200Sbmilekic mtx_lock_spin(&sio_lock); 225551078Speter delta = com->delta_error_counts[errnum]; 225651078Speter com->delta_error_counts[errnum] = 0; 225772200Sbmilekic mtx_unlock_spin(&sio_lock); 225851078Speter if (delta == 0) 225951078Speter continue; 226051078Speter total = com->error_counts[errnum] += delta; 226151078Speter log(LOG_ERR, "sio%d: %u more %s%s (total %lu)\n", 226251078Speter unit, delta, error_desc[errnum], 226351078Speter delta == 1 ? "" : "s", total); 226451078Speter } 226551078Speter } 226651078Speter} 226751078Speter 226851078Speter/* 226951078Speter * Following are all routines needed for SIO to act as console 227051078Speter */ 227151078Speterstruct siocnstate { 227251078Speter u_char dlbl; 227351078Speter u_char dlbh; 227451078Speter u_char ier; 227551078Speter u_char cfcr; 227651078Speter u_char mcr; 227751078Speter}; 227851078Speter 2279120457Sphk/* 2280120457Sphk * This is a function in order to not replicate "ttyd%d" more 2281120457Sphk * places than absolutely necessary. 2282120457Sphk */ 2283120457Sphkstatic void 2284120457Sphksiocnset(struct consdev *cd, int unit) 2285120457Sphk{ 2286120457Sphk 2287120457Sphk cd->cn_unit = unit; 2288120457Sphk sprintf(cd->cn_name, "ttyd%d", unit); 2289120457Sphk} 2290120457Sphk 229192739Salfredstatic speed_t siocngetspeed(Port_t, u_long rclk); 229293010Sbdestatic void siocnclose(struct siocnstate *sp, Port_t iobase); 229393010Sbdestatic void siocnopen(struct siocnstate *sp, Port_t iobase, int speed); 229493010Sbdestatic void siocntxwait(Port_t iobase); 229551078Speter 2296158943Sphkstatic cn_probe_t sio_cnprobe; 2297158943Sphkstatic cn_init_t sio_cninit; 2298158943Sphkstatic cn_term_t sio_cnterm; 2299158943Sphkstatic cn_getc_t sio_cngetc; 2300158943Sphkstatic cn_putc_t sio_cnputc; 2301228631Savgstatic cn_grab_t sio_cngrab; 2302228631Savgstatic cn_ungrab_t sio_cnungrab; 230351078Speter 2304158947SphkCONSOLE_DRIVER(sio); 230551078Speter 230651078Speterstatic void 230751078Spetersiocntxwait(iobase) 230851078Speter Port_t iobase; 230951078Speter{ 231051078Speter int timo; 231151078Speter 231251078Speter /* 231351078Speter * Wait for any pending transmission to finish. Required to avoid 231451078Speter * the UART lockup bug when the speed is changed, and for normal 231551078Speter * transmits. 231651078Speter */ 231751078Speter timo = 100000; 231851078Speter while ((inb(iobase + com_lsr) & (LSR_TSRE | LSR_TXRDY)) 231951078Speter != (LSR_TSRE | LSR_TXRDY) && --timo != 0) 232051078Speter ; 232151078Speter} 232251078Speter 232351078Speter/* 232451078Speter * Read the serial port specified and try to figure out what speed 232551078Speter * it's currently running at. We're assuming the serial port has 232651078Speter * been initialized and is basicly idle. This routine is only intended 232751078Speter * to be run at system startup. 232851078Speter * 232951078Speter * If the value read from the serial port doesn't make sense, return 0. 233051078Speter */ 233151078Speter 233251078Speterstatic speed_t 233389986Sjhaysiocngetspeed(iobase, rclk) 233489986Sjhay Port_t iobase; 233589986Sjhay u_long rclk; 233651078Speter{ 233789986Sjhay u_int divisor; 233851078Speter u_char dlbh; 233951078Speter u_char dlbl; 234051078Speter u_char cfcr; 234151078Speter 234251078Speter cfcr = inb(iobase + com_cfcr); 234351078Speter outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 234451078Speter 234551078Speter dlbl = inb(iobase + com_dlbl); 234651078Speter dlbh = inb(iobase + com_dlbh); 234751078Speter 234851078Speter outb(iobase + com_cfcr, cfcr); 234951078Speter 235089986Sjhay divisor = dlbh << 8 | dlbl; 235151078Speter 235289986Sjhay /* XXX there should be more sanity checking. */ 235389986Sjhay if (divisor == 0) 235489986Sjhay return (CONSPEED); 235589986Sjhay return (rclk / (16UL * divisor)); 235651078Speter} 235751078Speter 235851078Speterstatic void 235951078Spetersiocnopen(sp, iobase, speed) 236051078Speter struct siocnstate *sp; 236151078Speter Port_t iobase; 236251078Speter int speed; 236351078Speter{ 236489986Sjhay u_int divisor; 236551078Speter u_char dlbh; 236651078Speter u_char dlbl; 236751078Speter 236851078Speter /* 236951078Speter * Save all the device control registers except the fifo register 237051078Speter * and set our default ones (cs8 -parenb speed=comdefaultrate). 237151078Speter * We can't save the fifo register since it is read-only. 237251078Speter */ 237351078Speter sp->ier = inb(iobase + com_ier); 237451078Speter outb(iobase + com_ier, 0); /* spltty() doesn't stop siointr() */ 237551078Speter siocntxwait(iobase); 237651078Speter sp->cfcr = inb(iobase + com_cfcr); 237751078Speter outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 237851078Speter sp->dlbl = inb(iobase + com_dlbl); 237951078Speter sp->dlbh = inb(iobase + com_dlbh); 238051078Speter /* 238151078Speter * Only set the divisor registers if they would change, since on 238251078Speter * some 16550 incompatibles (Startech), setting them clears the 238351078Speter * data input register. This also reduces the effects of the 238451078Speter * UMC8669F bug. 238551078Speter */ 238689986Sjhay divisor = siodivisor(comdefaultrclk, speed); 238751078Speter dlbl = divisor & 0xFF; 238851078Speter if (sp->dlbl != dlbl) 238951078Speter outb(iobase + com_dlbl, dlbl); 239089986Sjhay dlbh = divisor >> 8; 239151078Speter if (sp->dlbh != dlbh) 239251078Speter outb(iobase + com_dlbh, dlbh); 239351078Speter outb(iobase + com_cfcr, CFCR_8BITS); 239451078Speter sp->mcr = inb(iobase + com_mcr); 239551078Speter /* 239651078Speter * We don't want interrupts, but must be careful not to "disable" 239751078Speter * them by clearing the MCR_IENABLE bit, since that might cause 239851078Speter * an interrupt by floating the IRQ line. 239951078Speter */ 240051078Speter outb(iobase + com_mcr, (sp->mcr & MCR_IENABLE) | MCR_DTR | MCR_RTS); 240151078Speter} 240251078Speter 240351078Speterstatic void 240451078Spetersiocnclose(sp, iobase) 240551078Speter struct siocnstate *sp; 240651078Speter Port_t iobase; 240751078Speter{ 240851078Speter /* 240951078Speter * Restore the device control registers. 241051078Speter */ 241151078Speter siocntxwait(iobase); 241251078Speter outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 241351078Speter if (sp->dlbl != inb(iobase + com_dlbl)) 241451078Speter outb(iobase + com_dlbl, sp->dlbl); 241551078Speter if (sp->dlbh != inb(iobase + com_dlbh)) 241651078Speter outb(iobase + com_dlbh, sp->dlbh); 241751078Speter outb(iobase + com_cfcr, sp->cfcr); 241851078Speter /* 241951078Speter * XXX damp oscillations of MCR_DTR and MCR_RTS by not restoring them. 242051078Speter */ 242151078Speter outb(iobase + com_mcr, sp->mcr | MCR_DTR | MCR_RTS); 242251078Speter outb(iobase + com_ier, sp->ier); 242351078Speter} 242451078Speter 242551078Speterstatic void 2426158943Sphksio_cnprobe(cp) 242751078Speter struct consdev *cp; 242851078Speter{ 242951078Speter speed_t boot_speed; 243051078Speter u_char cfcr; 243189986Sjhay u_int divisor; 2432128899Sambrisko int s, unit; 243351078Speter struct siocnstate sp; 243451078Speter 243551078Speter /* 243651078Speter * Find our first enabled console, if any. If it is a high-level 243751078Speter * console device, then initialize it and return successfully. 243851078Speter * If it is a low-level console device, then initialize it and 243951078Speter * return unsuccessfully. It must be initialized in both cases 244051078Speter * for early use by console drivers and debuggers. Initializing 244151078Speter * the hardware is not necessary in all cases, since the i/o 244251078Speter * routines initialize it on the fly, but it is necessary if 244351078Speter * input might arrive while the hardware is switched back to an 244451078Speter * uninitialized state. We can't handle multiple console devices 244551078Speter * yet because our low-level routines don't take a device arg. 244651078Speter * We trust the user to set the console flags properly so that we 244751078Speter * don't need to probe. 244851078Speter */ 244951078Speter cp->cn_pri = CN_DEAD; 245051078Speter 2451128899Sambrisko for (unit = 0; unit < 16; unit++) { /* XXX need to know how many */ 2452128899Sambrisko int flags; 2453117167Sjhb 2454128899Sambrisko if (resource_disabled("sio", unit)) 2455128899Sambrisko continue; 2456128899Sambrisko if (resource_int_value("sio", unit, "flags", &flags)) 2457128899Sambrisko continue; 2458128899Sambrisko if (COM_CONSOLE(flags) || COM_DEBUGGER(flags)) { 2459128899Sambrisko int port; 2460128899Sambrisko Port_t iobase; 2461128899Sambrisko 2462128899Sambrisko if (resource_int_value("sio", unit, "port", &port)) 2463128781Sambrisko continue; 2464128899Sambrisko iobase = port; 2465128899Sambrisko s = spltty(); 2466174283Sjulian if ((boothowto & RB_SERIAL) && COM_CONSOLE(flags)) { 2467128899Sambrisko boot_speed = 2468128899Sambrisko siocngetspeed(iobase, comdefaultrclk); 2469128899Sambrisko if (boot_speed) 2470128899Sambrisko comdefaultrate = boot_speed; 247151078Speter } 247251078Speter 247351078Speter /* 247451078Speter * Initialize the divisor latch. We can't rely on 247551078Speter * siocnopen() to do this the first time, since it 247651078Speter * avoids writing to the latch if the latch appears 247751078Speter * to have the correct value. Also, if we didn't 247851078Speter * just read the speed from the hardware, then we 247951078Speter * need to set the speed in hardware so that 248051078Speter * switching it later is null. 248151078Speter */ 2482128899Sambrisko cfcr = inb(iobase + com_cfcr); 2483128899Sambrisko outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 2484128899Sambrisko divisor = siodivisor(comdefaultrclk, comdefaultrate); 2485128899Sambrisko outb(iobase + com_dlbl, divisor & 0xff); 2486128899Sambrisko outb(iobase + com_dlbh, divisor >> 8); 2487128899Sambrisko outb(iobase + com_cfcr, cfcr); 248851078Speter 2489128899Sambrisko siocnopen(&sp, iobase, comdefaultrate); 249051078Speter 2491128899Sambrisko splx(s); 2492128899Sambrisko if (COM_CONSOLE(flags) && !COM_LLCONSOLE(flags)) { 2493128899Sambrisko siocnset(cp, unit); 2494128899Sambrisko cp->cn_pri = COM_FORCECONSOLE(flags) 2495128899Sambrisko || boothowto & RB_SERIAL 2496128899Sambrisko ? CN_REMOTE : CN_NORMAL; 2497128899Sambrisko siocniobase = iobase; 2498128899Sambrisko siocnunit = unit; 2499128899Sambrisko } 2500131939Smarcel#ifdef GDB 2501131939Smarcel if (COM_DEBUGGER(flags)) 2502128899Sambrisko siogdbiobase = iobase; 250351078Speter#endif 250451078Speter } 250551078Speter } 250651078Speter} 250751078Speter 250866230Sjhbstatic void 2509158943Sphksio_cninit(cp) 251066230Sjhb struct consdev *cp; 251166230Sjhb{ 2512120457Sphk comconsole = cp->cn_unit; 251366230Sjhb} 251466230Sjhb 251585371Sjlemonstatic void 2516158943Sphksio_cnterm(cp) 251785371Sjlemon struct consdev *cp; 251885371Sjlemon{ 251985371Sjlemon comconsole = -1; 252085371Sjlemon} 252185371Sjlemon 2522228631Savgstatic void 2523228631Savgsio_cngrab(struct consdev *cp) 2524228631Savg{ 2525228631Savg} 2526228631Savg 2527228631Savgstatic void 2528228631Savgsio_cnungrab(struct consdev *cp) 2529228631Savg{ 2530228631Savg} 2531228631Savg 253251078Speterstatic int 2533158947Sphksio_cngetc(struct consdev *cd) 253451078Speter{ 253551078Speter int c; 253651078Speter Port_t iobase; 253751078Speter int s; 253851078Speter struct siocnstate sp; 253998401Sn_hibma speed_t speed; 2540131939Smarcel 2541131939Smarcel if (cd != NULL && cd->cn_unit == siocnunit) { 254298401Sn_hibma iobase = siocniobase; 254398401Sn_hibma speed = comdefaultrate; 254498401Sn_hibma } else { 2545131939Smarcel#ifdef GDB 254651078Speter iobase = siogdbiobase; 254798401Sn_hibma speed = gdbdefaultrate; 2548131939Smarcel#else 2549131939Smarcel return (-1); 2550131939Smarcel#endif 255198401Sn_hibma } 255251078Speter s = spltty(); 255398401Sn_hibma siocnopen(&sp, iobase, speed); 255451078Speter if (inb(iobase + com_lsr) & LSR_RXRDY) 255551078Speter c = inb(iobase + com_data); 255651078Speter else 255751078Speter c = -1; 255851078Speter siocnclose(&sp, iobase); 255951078Speter splx(s); 256051078Speter return (c); 256151078Speter} 256251078Speter 2563104094Sphkstatic void 2564158943Sphksio_cnputc(struct consdev *cd, int c) 256551078Speter{ 256688582Sbde int need_unlock; 256751078Speter int s; 256851078Speter struct siocnstate sp; 256951078Speter Port_t iobase; 257098401Sn_hibma speed_t speed; 257151078Speter 2572131939Smarcel if (cd != NULL && cd->cn_unit == siocnunit) { 257398401Sn_hibma iobase = siocniobase; 257498401Sn_hibma speed = comdefaultrate; 257598401Sn_hibma } else { 2576131939Smarcel#ifdef GDB 257751078Speter iobase = siogdbiobase; 257898401Sn_hibma speed = gdbdefaultrate; 2579131939Smarcel#else 2580131939Smarcel return; 2581131939Smarcel#endif 258298401Sn_hibma } 258351078Speter s = spltty(); 258488582Sbde need_unlock = 0; 2585141530Srwatson if (!kdb_active && sio_inited == 2 && !mtx_owned(&sio_lock)) { 2586141530Srwatson mtx_lock_spin(&sio_lock); 2587141530Srwatson need_unlock = 1; 258888582Sbde } 258998401Sn_hibma siocnopen(&sp, iobase, speed); 259051078Speter siocntxwait(iobase); 259151078Speter outb(iobase + com_data, c); 259251078Speter siocnclose(&sp, iobase); 2593141530Srwatson if (need_unlock) 2594141530Srwatson mtx_unlock_spin(&sio_lock); 259551078Speter splx(s); 259651078Speter} 259751078Speter 2598131939Smarcel/* 2599131939Smarcel * Remote gdb(1) support. 2600131939Smarcel */ 2601131939Smarcel 2602131939Smarcel#if defined(GDB) 2603131939Smarcel 2604131939Smarcel#include <gdb/gdb.h> 2605131939Smarcel 2606131939Smarcelstatic gdb_probe_f siogdbprobe; 2607131939Smarcelstatic gdb_init_f siogdbinit; 2608131939Smarcelstatic gdb_term_f siogdbterm; 2609131939Smarcelstatic gdb_getc_f siogdbgetc; 2610131939Smarcelstatic gdb_putc_f siogdbputc; 2611131939Smarcel 2612158950SphkGDB_DBGPORT(sio, siogdbprobe, siogdbinit, siogdbterm, siogdbgetc, siogdbputc); 2613131939Smarcel 2614131939Smarcelstatic int 2615131939Smarcelsiogdbprobe(void) 261651078Speter{ 2617131939Smarcel return ((siogdbiobase != 0) ? 0 : -1); 2618131939Smarcel} 261951078Speter 2620131939Smarcelstatic void 2621131939Smarcelsiogdbinit(void) 2622131939Smarcel{ 2623131939Smarcel} 262498401Sn_hibma 2625131939Smarcelstatic void 2626131939Smarcelsiogdbterm(void) 2627131939Smarcel{ 262851078Speter} 262951078Speter 2630131939Smarcelstatic void 2631131939Smarcelsiogdbputc(int c) 263251078Speter{ 2633158943Sphk sio_cnputc(NULL, c); 2634131939Smarcel} 263551078Speter 2636131939Smarcelstatic int 2637158947Sphksiogdbgetc(void) 2638131939Smarcel{ 2639158950Sphk return (sio_cngetc(NULL)); 264051078Speter} 2641131939Smarcel 264251078Speter#endif 2643