sio.c revision 166901
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: head/sys/dev/sio/sio.c 166901 2007-02-23 12:19:07Z piso $"); 35119419Sobrien 3651078Speter#include "opt_comconsole.h" 3751078Speter#include "opt_compat.h" 38131939Smarcel#include "opt_gdb.h" 39131939Smarcel#include "opt_kdb.h" 4051078Speter#include "opt_sio.h" 4151078Speter 4251078Speter/* 4351078Speter * Serial driver, based on 386BSD-0.1 com driver. 4451078Speter * Mostly rewritten to use pseudo-DMA. 4551078Speter * Works for National Semiconductor NS8250-NS16550AF UARTs. 4651078Speter * COM driver, based on HP dca driver. 4751078Speter * 48150460Simp * Changes for PC Card integration: 49150460Simp * - Added PC Card driver table and handlers 5051078Speter */ 5151078Speter#include <sys/param.h> 5276166Smarkm#include <sys/systm.h> 5365822Sjhb#include <sys/bus.h> 5451078Speter#include <sys/conf.h> 5551078Speter#include <sys/fcntl.h> 5651078Speter#include <sys/interrupt.h> 57131939Smarcel#include <sys/kdb.h> 5851078Speter#include <sys/kernel.h> 59114216Skan#include <sys/limits.h> 6076166Smarkm#include <sys/lock.h> 6176166Smarkm#include <sys/malloc.h> 6276166Smarkm#include <sys/module.h> 6376166Smarkm#include <sys/mutex.h> 6476166Smarkm#include <sys/proc.h> 6576166Smarkm#include <sys/reboot.h> 66131094Sphk#include <sys/serial.h> 6776166Smarkm#include <sys/sysctl.h> 6851078Speter#include <sys/syslog.h> 6976166Smarkm#include <sys/tty.h> 7051078Speter#include <machine/bus.h> 7151078Speter#include <sys/rman.h> 7251078Speter#include <sys/timepps.h> 7393466Sbde#include <sys/uio.h> 74119485Snjl#include <sys/cons.h> 7551078Speter 7686909Simp#include <isa/isavar.h> 7786909Simp 7851078Speter#include <machine/resource.h> 7951078Speter 8085302Simp#include <dev/sio/sioreg.h> 8185365Simp#include <dev/sio/siovar.h> 8251078Speter 8351078Speter#ifdef COM_ESP 8477726Sjoerg#include <dev/ic/esp.h> 8551078Speter#endif 8677726Sjoerg#include <dev/ic/ns16550.h> 8751078Speter 8851078Speter#define LOTS_OF_EVENTS 64 /* helps separate urgent events from input */ 8951078Speter 9051078Speter#ifdef COM_MULTIPORT 9151078Speter/* checks in flags for multiport and which is multiport "master chip" 9251078Speter * for a given card 9351078Speter */ 9451078Speter#define COM_ISMULTIPORT(flags) ((flags) & 0x01) 9551078Speter#define COM_MPMASTER(flags) (((flags) >> 8) & 0x0ff) 9651078Speter#define COM_NOTAST4(flags) ((flags) & 0x04) 97104067Sphk#else 98104067Sphk#define COM_ISMULTIPORT(flags) (0) 9951078Speter#endif /* COM_MULTIPORT */ 10051078Speter 101120175Sbde#define COM_C_IIR_TXRDYBUG 0x80000 10251078Speter#define COM_CONSOLE(flags) ((flags) & 0x10) 103120175Sbde#define COM_DEBUGGER(flags) ((flags) & 0x80) 104120175Sbde#define COM_FIFOSIZE(flags) (((flags) & 0xff000000) >> 24) 10551078Speter#define COM_FORCECONSOLE(flags) ((flags) & 0x20) 106120175Sbde#define COM_IIR_TXRDYBUG(flags) ((flags) & COM_C_IIR_TXRDYBUG) 10751078Speter#define COM_LLCONSOLE(flags) ((flags) & 0x40) 10851078Speter#define COM_LOSESOUTINTS(flags) ((flags) & 0x08) 109120175Sbde#define COM_NOFIFO(flags) ((flags) & 0x02) 110120175Sbde#define COM_NOPROBE(flags) ((flags) & 0x40000) 111120175Sbde#define COM_NOSCR(flags) ((flags) & 0x100000) 112111613Sphk#define COM_PPSCTS(flags) ((flags) & 0x10000) 113120175Sbde#define COM_ST16650A(flags) ((flags) & 0x20000) 114112384Ssobomax#define COM_TI16754(flags) ((flags) & 0x200000) 11551078Speter 11660471Snyan#define sio_getreg(com, off) \ 11760471Snyan (bus_space_read_1((com)->bst, (com)->bsh, (off))) 11860471Snyan#define sio_setreg(com, off, value) \ 11960471Snyan (bus_space_write_1((com)->bst, (com)->bsh, (off), (value))) 12060471Snyan 12151078Speter/* 12251078Speter * com state bits. 12351078Speter * (CS_BUSY | CS_TTGO) and (CS_BUSY | CS_TTGO | CS_ODEVREADY) must be higher 12451078Speter * than the other bits so that they can be tested as a group without masking 12551078Speter * off the low bits. 12651078Speter * 12751078Speter * The following com and tty flags correspond closely: 12851078Speter * CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and 12953344Speter * comstop()) 13051078Speter * CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart()) 13151078Speter * CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam()) 13251078Speter * CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam()) 13351078Speter * TS_FLUSH is not used. 13451078Speter * XXX I think TIOCSETA doesn't clear TS_TTSTOP when it clears IXON. 13551078Speter * XXX CS_*FLOW should be CF_*FLOW in com->flags (control flags not state). 13651078Speter */ 13751078Speter#define CS_BUSY 0x80 /* output in progress */ 13851078Speter#define CS_TTGO 0x40 /* output not stopped by XOFF */ 13951078Speter#define CS_ODEVREADY 0x20 /* external device h/w ready (CTS) */ 14051078Speter#define CS_CHECKMSR 1 /* check of MSR scheduled */ 14151078Speter#define CS_CTS_OFLOW 2 /* use CTS output flow control */ 14251078Speter#define CS_ODONE 4 /* output completed */ 14351078Speter#define CS_RTS_IFLOW 8 /* use RTS input flow control */ 14451078Speter#define CSE_BUSYCHECK 1 /* siobusycheck() scheduled */ 14551078Speter 14651078Speterstatic char const * const error_desc[] = { 14751078Speter#define CE_OVERRUN 0 14851078Speter "silo overflow", 14951078Speter#define CE_INTERRUPT_BUF_OVERFLOW 1 15051078Speter "interrupt-level buffer overflow", 15151078Speter#define CE_TTY_BUF_OVERFLOW 2 15251078Speter "tty-level buffer overflow", 15351078Speter}; 15451078Speter 15586909Simp#define CE_NTYPES 3 15651078Speter#define CE_RECORD(com, errnum) (++(com)->delta_error_counts[errnum]) 15751078Speter 15886909Simp/* types. XXX - should be elsewhere */ 15986909Simptypedef u_int Port_t; /* hardware port */ 16086909Simptypedef u_char bool_t; /* boolean */ 16186909Simp 16286909Simp/* queue of linear buffers */ 16386909Simpstruct lbq { 16486909Simp u_char *l_head; /* next char to process */ 16586909Simp u_char *l_tail; /* one past the last char to process */ 16686909Simp struct lbq *l_next; /* next in queue */ 16786909Simp bool_t l_queued; /* nonzero if queued */ 16886909Simp}; 16986909Simp 17086909Simp/* com device structure */ 17186909Simpstruct com_s { 17286909Simp u_char state; /* miscellaneous flag bits */ 17386909Simp u_char cfcr_image; /* copy of value written to CFCR */ 17451078Speter#ifdef COM_ESP 17586909Simp bool_t esp; /* is this unit a hayes esp board? */ 17686909Simp#endif 17786909Simp u_char extra_state; /* more flag bits, separate for order trick */ 17886909Simp u_char fifo_image; /* copy of value written to FIFO */ 17986909Simp bool_t hasfifo; /* nonzero for 16550 UARTs */ 18086909Simp bool_t loses_outints; /* nonzero if device loses output interrupts */ 18186909Simp u_char mcr_image; /* copy of value written to MCR */ 18286909Simp#ifdef COM_MULTIPORT 18386909Simp bool_t multiport; /* is this unit part of a multiport device? */ 18486909Simp#endif /* COM_MULTIPORT */ 18586909Simp bool_t no_irq; /* nonzero if irq is not attached */ 18686909Simp bool_t gone; /* hardware disappeared */ 18786909Simp bool_t poll; /* nonzero if polling is required */ 18886909Simp bool_t poll_output; /* nonzero if polling for output is required */ 189120175Sbde bool_t st16650a; /* nonzero if Startech 16650A compatible */ 19086909Simp int unit; /* unit number */ 191120189Sbde u_int flags; /* copy of device flags */ 19286909Simp u_int tx_fifo_size; 19386909Simp 19486909Simp /* 19586909Simp * The high level of the driver never reads status registers directly 19686909Simp * because there would be too many side effects to handle conveniently. 19786909Simp * Instead, it reads copies of the registers stored here by the 19886909Simp * interrupt handler. 19986909Simp */ 20086909Simp u_char last_modem_status; /* last MSR read by intr handler */ 20186909Simp u_char prev_modem_status; /* last MSR handled by high level */ 20286909Simp 20386909Simp u_char *ibuf; /* start of input buffer */ 20486909Simp u_char *ibufend; /* end of input buffer */ 20586909Simp u_char *ibufold; /* old input buffer, to be freed */ 20686909Simp u_char *ihighwater; /* threshold in input buffer */ 20786909Simp u_char *iptr; /* next free spot in input buffer */ 20886909Simp int ibufsize; /* size of ibuf (not include error bytes) */ 20986909Simp int ierroff; /* offset of error bytes in ibuf */ 21086909Simp 21186909Simp struct lbq obufq; /* head of queue of output buffers */ 21286909Simp struct lbq obufs[2]; /* output buffers */ 21386909Simp 21486909Simp bus_space_tag_t bst; 21586909Simp bus_space_handle_t bsh; 21686909Simp 21786909Simp Port_t data_port; /* i/o ports */ 21886909Simp#ifdef COM_ESP 21986909Simp Port_t esp_port; 22086909Simp#endif 221120189Sbde Port_t int_ctl_port; 22286909Simp Port_t int_id_port; 22386909Simp Port_t modem_ctl_port; 22486909Simp Port_t line_status_port; 22586909Simp Port_t modem_status_port; 22686909Simp 22786909Simp struct tty *tp; /* cross reference */ 22886909Simp 22986909Simp struct pps_state pps; 230111613Sphk int pps_bit; 231119485Snjl#ifdef ALT_BREAK_TO_DEBUGGER 232119485Snjl int alt_brk_state; 233119485Snjl#endif 23486909Simp 23586909Simp u_long bytes_in; /* statistics */ 23686909Simp u_long bytes_out; 23786909Simp u_int delta_error_counts[CE_NTYPES]; 23886909Simp u_long error_counts[CE_NTYPES]; 23986909Simp 24089986Sjhay u_long rclk; 24189986Sjhay 24286909Simp struct resource *irqres; 24386909Simp struct resource *ioportres; 244116120Sscottl int ioportrid; 245116120Sscottl void *cookie; 24686909Simp 24786909Simp /* 24886909Simp * Data area for output buffers. Someday we should build the output 24986909Simp * buffer queue without copying data. 25086909Simp */ 25186909Simp u_char obuf1[256]; 25286909Simp u_char obuf2[256]; 25386909Simp}; 25486909Simp 25586909Simp#ifdef COM_ESP 25693010Sbdestatic int espattach(struct com_s *com, Port_t esp_port); 25751078Speter#endif 25851078Speter 259131373Sphkstatic void combreak(struct tty *tp, int sig); 26051078Speterstatic timeout_t siobusycheck; 26193010Sbdestatic u_int siodivisor(u_long rclk, speed_t speed); 262136478Sphkstatic void comclose(struct tty *tp); 263136478Sphkstatic int comopen(struct tty *tp, struct cdev *dev); 26493010Sbdestatic void sioinput(struct com_s *com); 26593010Sbdestatic void siointr1(struct com_s *com); 266166901Spisostatic int siointr(void *arg); 267131094Sphkstatic int commodem(struct tty *tp, int sigon, int sigoff); 26893010Sbdestatic int comparam(struct tty *tp, struct termios *t); 26993010Sbdestatic void siopoll(void *); 27093010Sbdestatic void siosettimeout(void); 27193010Sbdestatic int siosetwater(struct com_s *com, speed_t speed); 27293010Sbdestatic void comstart(struct tty *tp); 27393010Sbdestatic void comstop(struct tty *tp, int rw); 27451078Speterstatic timeout_t comwakeup; 27551078Speter 27685365Simpchar sio_driver_name[] = "sio"; 27770174Sjhbstatic struct mtx sio_lock; 27870174Sjhbstatic int sio_inited; 27951078Speter 28051078Speter/* table and macro for fast conversion from a unit number to its com struct */ 28185365Simpdevclass_t sio_devclass; 28251078Speter#define com_addr(unit) ((struct com_s *) \ 28386909Simp devclass_get_softc(sio_devclass, unit)) /* XXX */ 28451078Speter 285114722Sobrienint comconsole = -1; 28651078Speterstatic volatile speed_t comdefaultrate = CONSPEED; 28789986Sjhaystatic u_long comdefaultrclk = DEFAULT_RCLK; 28889986SjhaySYSCTL_ULONG(_machdep, OID_AUTO, conrclk, CTLFLAG_RW, &comdefaultrclk, 0, ""); 28998401Sn_hibmastatic speed_t gdbdefaultrate = GDBSPEED; 29098401Sn_hibmaSYSCTL_UINT(_machdep, OID_AUTO, gdbspeed, CTLFLAG_RW, 29198401Sn_hibma &gdbdefaultrate, GDBSPEED, ""); 29251078Speterstatic u_int com_events; /* input chars + weighted output completions */ 29351078Speterstatic Port_t siocniobase; 29498401Sn_hibmastatic int siocnunit = -1; 29572238Sjhbstatic void *sio_slow_ih; 29672238Sjhbstatic void *sio_fast_ih; 29751078Speterstatic int sio_timeout; 29851078Speterstatic int sio_timeouts_until_log; 29951078Speterstatic struct callout_handle sio_timeout_handle 30051078Speter = CALLOUT_HANDLE_INITIALIZER(&sio_timeout_handle); 30153344Speterstatic int sio_numunits; 30251078Speter 303131939Smarcel#ifdef GDB 304131939Smarcelstatic Port_t siogdbiobase = 0; 305131939Smarcel#endif 306131939Smarcel 30751078Speter#ifdef COM_ESP 30851078Speter/* XXX configure this properly. */ 30986909Simp/* XXX quite broken for new-bus. */ 31051078Speterstatic Port_t likely_com_ports[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, }; 31151078Speterstatic Port_t likely_esp_ports[] = { 0x140, 0x180, 0x280, 0 }; 31251078Speter#endif 31351078Speter 31451078Speter/* 31551078Speter * handle sysctl read/write requests for console speed 31651078Speter * 31751078Speter * In addition to setting comdefaultrate for I/O through /dev/console, 31851078Speter * also set the initial and lock values for the /dev/ttyXX device 31951078Speter * if there is one associated with the console. Finally, if the /dev/tty 32051078Speter * device has already been open, change the speed on the open running port 32151078Speter * itself. 32251078Speter */ 32351078Speter 32451078Speterstatic int 32562573Sphksysctl_machdep_comdefaultrate(SYSCTL_HANDLER_ARGS) 32651078Speter{ 32751078Speter int error, s; 32851078Speter speed_t newspeed; 32951078Speter struct com_s *com; 33051078Speter struct tty *tp; 33151078Speter 33251078Speter newspeed = comdefaultrate; 33351078Speter 33451078Speter error = sysctl_handle_opaque(oidp, &newspeed, sizeof newspeed, req); 33551078Speter if (error || !req->newptr) 33651078Speter return (error); 33751078Speter 33851078Speter comdefaultrate = newspeed; 33951078Speter 34051078Speter if (comconsole < 0) /* serial console not selected? */ 34151078Speter return (0); 34251078Speter 34351078Speter com = com_addr(comconsole); 34457915Simp if (com == NULL) 34551078Speter return (ENXIO); 34651078Speter 347135329Sphk tp = com->tp; 348135516Snyan if (tp == NULL) 349135516Snyan return (ENXIO); 350135516Snyan 35151078Speter /* 35251078Speter * set the initial and lock rates for /dev/ttydXX and /dev/cuaXX 35351078Speter * (note, the lock rates really are boolean -- if non-zero, disallow 35451078Speter * speed changes) 35551078Speter */ 356135329Sphk tp->t_init_in.c_ispeed = tp->t_init_in.c_ospeed = 357135329Sphk tp->t_lock_in.c_ispeed = tp->t_lock_in.c_ospeed = 358135329Sphk tp->t_init_out.c_ispeed = tp->t_init_out.c_ospeed = 359135329Sphk tp->t_lock_out.c_ispeed = tp->t_lock_out.c_ospeed = comdefaultrate; 36051078Speter 361135516Snyan if (tp->t_state & TS_ISOPEN) { 36251078Speter tp->t_termios.c_ispeed = 36351078Speter tp->t_termios.c_ospeed = comdefaultrate; 36451078Speter s = spltty(); 36551078Speter error = comparam(tp, &tp->t_termios); 36651078Speter splx(s); 36751078Speter } 36851078Speter return error; 36951078Speter} 37051078Speter 37151078SpeterSYSCTL_PROC(_machdep, OID_AUTO, conspeed, CTLTYPE_INT | CTLFLAG_RW, 37251078Speter 0, 0, sysctl_machdep_comdefaultrate, "I", ""); 373153195SimpTUNABLE_INT("machdep.conspeed", __DEVOLATILE(int *, &comdefaultrate)); 37451078Speter 37586909Simp#define SET_FLAG(dev, bit) device_set_flags(dev, device_get_flags(dev) | (bit)) 37686909Simp#define CLR_FLAG(dev, bit) device_set_flags(dev, device_get_flags(dev) & ~(bit)) 37786909Simp 37886909Simp/* 37986909Simp * Unload the driver and clear the table. 38086909Simp * XXX this is mostly wrong. 38186909Simp * XXX TODO: 38286909Simp * This is usually called when the card is ejected, but 383104933Simp * can be caused by a kldunload of a controller driver. 38486909Simp * The idea is to reset the driver's view of the device 38586909Simp * and ensure that any driver entry points such as 38686909Simp * read and write do not hang. 38786909Simp */ 38885365Simpint 389136478Sphksiodetach(device_t dev) 39051078Speter{ 39151078Speter struct com_s *com; 39251078Speter 39352471Simp com = (struct com_s *) device_get_softc(dev); 39457915Simp if (com == NULL) { 39552471Simp device_printf(dev, "NULL com in siounload\n"); 39654386Simp return (0); 39751078Speter } 398120175Sbde com->gone = TRUE; 399132561Simp if (com->tp) 400136478Sphk ttyfree(com->tp); 40154386Simp if (com->irqres) { 40254386Simp bus_teardown_intr(dev, com->irqres, com->cookie); 40354386Simp bus_release_resource(dev, SYS_RES_IRQ, 0, com->irqres); 40454386Simp } 40554386Simp if (com->ioportres) 406116120Sscottl bus_release_resource(dev, SYS_RES_IOPORT, com->ioportrid, 407116120Sscottl com->ioportres); 408136478Sphk if (com->ibuf != NULL) 409136478Sphk free(com->ibuf, M_DEVBUF); 410136478Sphk 411136478Sphk device_set_softc(dev, NULL); 412136478Sphk free(com, M_DEVBUF); 41353978Simp return (0); 41451078Speter} 41551078Speter 41685365Simpint 41789986Sjhaysioprobe(dev, xrid, rclk, noprobe) 41858885Simp device_t dev; 41958885Simp int xrid; 42089986Sjhay u_long rclk; 42185365Simp int noprobe; 42251078Speter{ 42353344Speter#if 0 42451078Speter static bool_t already_init; 42553344Speter device_t xdev; 42653344Speter#endif 42760471Snyan struct com_s *com; 42889986Sjhay u_int divisor; 42951078Speter bool_t failures[10]; 43051078Speter int fn; 43151078Speter device_t idev; 43251078Speter Port_t iobase; 43351078Speter intrmask_t irqmap[4]; 43451078Speter intrmask_t irqs; 43551078Speter u_char mcr_image; 43651078Speter int result; 43754206Speter u_long xirq; 43851088Speter u_int flags = device_get_flags(dev); 43951078Speter int rid; 44051078Speter struct resource *port; 44151078Speter 44258885Simp rid = xrid; 44351078Speter port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 44451078Speter 0, ~0, IO_COMSIZE, RF_ACTIVE); 44551078Speter if (!port) 44657915Simp return (ENXIO); 44751078Speter 44886909Simp com = malloc(sizeof(*com), M_DEVBUF, M_NOWAIT | M_ZERO); 449124669Sru if (com == NULL) { 450124669Sru bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 45186909Simp return (ENOMEM); 452124669Sru } 45386909Simp device_set_softc(dev, com); 45460471Snyan com->bst = rman_get_bustag(port); 45560471Snyan com->bsh = rman_get_bushandle(port); 45689986Sjhay if (rclk == 0) 45789986Sjhay rclk = DEFAULT_RCLK; 45889986Sjhay com->rclk = rclk; 45960471Snyan 46085209Sjhb while (sio_inited != 2) 46185209Sjhb if (atomic_cmpset_int(&sio_inited, 0, 1)) { 46293818Sjhb mtx_init(&sio_lock, sio_driver_name, NULL, 46393818Sjhb (comconsole != -1) ? 46485209Sjhb MTX_SPIN | MTX_QUIET : MTX_SPIN); 46585209Sjhb atomic_store_rel_int(&sio_inited, 2); 46685209Sjhb } 46770174Sjhb 46853344Speter#if 0 46953344Speter /* 47053344Speter * XXX this is broken - when we are first called, there are no 47153344Speter * previously configured IO ports. We could hard code 47253344Speter * 0x3f8, 0x2f8, 0x3e8, 0x2e8 etc but that's probably worse. 47353344Speter * This code has been doing nothing since the conversion since 47453344Speter * "count" is zero the first time around. 47553344Speter */ 47651078Speter if (!already_init) { 47751078Speter /* 47851078Speter * Turn off MCR_IENABLE for all likely serial ports. An unused 47951078Speter * port with its MCR_IENABLE gate open will inhibit interrupts 48051078Speter * from any used port that shares the interrupt vector. 48151078Speter * XXX the gate enable is elsewhere for some multiports. 48251078Speter */ 48351078Speter device_t *devs; 48453344Speter int count, i, xioport; 48551078Speter 48651078Speter devclass_get_devices(sio_devclass, &devs, &count); 48751078Speter for (i = 0; i < count; i++) { 48851078Speter xdev = devs[i]; 48954194Speter if (device_is_enabled(xdev) && 49054194Speter bus_get_resource(xdev, SYS_RES_IOPORT, 0, &xioport, 49154194Speter NULL) == 0) 49253344Speter outb(xioport + com_mcr, 0); 49351078Speter } 49451078Speter free(devs, M_TEMP); 49551078Speter already_init = TRUE; 49651078Speter } 49753344Speter#endif 49851078Speter 49951078Speter if (COM_LLCONSOLE(flags)) { 50051078Speter printf("sio%d: reserved for low-level i/o\n", 50151078Speter device_get_unit(dev)); 50256788Sbde bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 50386909Simp device_set_softc(dev, NULL); 50486909Simp free(com, M_DEVBUF); 50551078Speter return (ENXIO); 50651078Speter } 50751078Speter 50851078Speter /* 50951078Speter * If the device is on a multiport card and has an AST/4 51051078Speter * compatible interrupt control register, initialize this 51151078Speter * register and prepare to leave MCR_IENABLE clear in the mcr. 51251078Speter * Otherwise, prepare to set MCR_IENABLE in the mcr. 51351078Speter * Point idev to the device struct giving the correct id_irq. 51451078Speter * This is the struct for the master device if there is one. 51551078Speter */ 51651078Speter idev = dev; 51751078Speter mcr_image = MCR_IENABLE; 51851078Speter#ifdef COM_MULTIPORT 51957234Sbde if (COM_ISMULTIPORT(flags)) { 52054206Speter Port_t xiobase; 52154206Speter u_long io; 52254206Speter 52351078Speter idev = devclass_get_device(sio_devclass, COM_MPMASTER(flags)); 52451078Speter if (idev == NULL) { 52551078Speter printf("sio%d: master device %d not configured\n", 52651078Speter device_get_unit(dev), COM_MPMASTER(flags)); 52751078Speter idev = dev; 52851078Speter } 52957234Sbde if (!COM_NOTAST4(flags)) { 53057234Sbde if (bus_get_resource(idev, SYS_RES_IOPORT, 0, &io, 53157234Sbde NULL) == 0) { 53257234Sbde xiobase = io; 53357234Sbde if (bus_get_resource(idev, SYS_RES_IRQ, 0, 53457234Sbde NULL, NULL) == 0) 53557234Sbde outb(xiobase + com_scr, 0x80); 53657234Sbde else 53757234Sbde outb(xiobase + com_scr, 0); 53857234Sbde } 53957234Sbde mcr_image = 0; 54051078Speter } 54151078Speter } 54251078Speter#endif /* COM_MULTIPORT */ 54354194Speter if (bus_get_resource(idev, SYS_RES_IRQ, 0, NULL, NULL) != 0) 54451078Speter mcr_image = 0; 54551078Speter 54651078Speter bzero(failures, sizeof failures); 54751078Speter iobase = rman_get_start(port); 54851078Speter 54951078Speter /* 55051078Speter * We don't want to get actual interrupts, just masked ones. 55151078Speter * Interrupts from this line should already be masked in the ICU, 55251078Speter * but mask them in the processor as well in case there are some 55351078Speter * (misconfigured) shared interrupts. 55451078Speter */ 55572200Sbmilekic mtx_lock_spin(&sio_lock); 55651078Speter/* EXTRA DELAY? */ 55751078Speter 55851078Speter /* 559112384Ssobomax * For the TI16754 chips, set prescaler to 1 (4 is often the 560112384Ssobomax * default after-reset value) as otherwise it's impossible to 561112270Ssobomax * get highest baudrates. 562112270Ssobomax */ 563112270Ssobomax if (COM_TI16754(flags)) { 564112384Ssobomax u_char cfcr, efr; 565112270Ssobomax 566112384Ssobomax cfcr = sio_getreg(com, com_cfcr); 567112384Ssobomax sio_setreg(com, com_cfcr, CFCR_EFR_ENABLE); 568112384Ssobomax efr = sio_getreg(com, com_efr); 569112384Ssobomax /* Unlock extended features to turn off prescaler. */ 570112384Ssobomax sio_setreg(com, com_efr, efr | EFR_EFE); 571112384Ssobomax /* Disable EFR. */ 572112384Ssobomax sio_setreg(com, com_cfcr, (cfcr != CFCR_EFR_ENABLE) ? cfcr : 0); 573112384Ssobomax /* Turn off prescaler. */ 574112384Ssobomax sio_setreg(com, com_mcr, 575112384Ssobomax sio_getreg(com, com_mcr) & ~MCR_PRESCALE); 576112384Ssobomax sio_setreg(com, com_cfcr, CFCR_EFR_ENABLE); 577112384Ssobomax sio_setreg(com, com_efr, efr); 578112384Ssobomax sio_setreg(com, com_cfcr, cfcr); 579112270Ssobomax } 580112384Ssobomax 581112270Ssobomax /* 58251078Speter * Initialize the speed and the word size and wait long enough to 58351078Speter * drain the maximum of 16 bytes of junk in device output queues. 58451078Speter * The speed is undefined after a master reset and must be set 58551078Speter * before relying on anything related to output. There may be 58651078Speter * junk after a (very fast) soft reboot and (apparently) after 58751078Speter * master reset. 58851078Speter * XXX what about the UART bug avoided by waiting in comparam()? 58951078Speter * We don't want to to wait long enough to drain at 2 bps. 59051078Speter */ 59151078Speter if (iobase == siocniobase) 59251078Speter DELAY((16 + 1) * 1000000 / (comdefaultrate / 10)); 59351078Speter else { 59460471Snyan sio_setreg(com, com_cfcr, CFCR_DLAB | CFCR_8BITS); 59589986Sjhay divisor = siodivisor(rclk, SIO_TEST_SPEED); 59689986Sjhay sio_setreg(com, com_dlbl, divisor & 0xff); 59789986Sjhay sio_setreg(com, com_dlbh, divisor >> 8); 59860471Snyan sio_setreg(com, com_cfcr, CFCR_8BITS); 59951078Speter DELAY((16 + 1) * 1000000 / (SIO_TEST_SPEED / 10)); 60051078Speter } 60151078Speter 60251078Speter /* 60351078Speter * Enable the interrupt gate and disable device interupts. This 60451078Speter * should leave the device driving the interrupt line low and 60551078Speter * guarantee an edge trigger if an interrupt can be generated. 60651078Speter */ 60751078Speter/* EXTRA DELAY? */ 60860471Snyan sio_setreg(com, com_mcr, mcr_image); 60960471Snyan sio_setreg(com, com_ier, 0); 61051078Speter DELAY(1000); /* XXX */ 61151078Speter irqmap[0] = isa_irq_pending(); 61251078Speter 61351078Speter /* 61451078Speter * Attempt to set loopback mode so that we can send a null byte 61551078Speter * without annoying any external device. 61651078Speter */ 61751078Speter/* EXTRA DELAY? */ 61860471Snyan sio_setreg(com, com_mcr, mcr_image | MCR_LOOPBACK); 61951078Speter 62051078Speter /* 62151078Speter * Attempt to generate an output interrupt. On 8250's, setting 62251078Speter * IER_ETXRDY generates an interrupt independent of the current 62351078Speter * setting and independent of whether the THR is empty. On 16450's, 62451078Speter * setting IER_ETXRDY generates an interrupt independent of the 62551078Speter * current setting. On 16550A's, setting IER_ETXRDY only 62651078Speter * generates an interrupt when IER_ETXRDY is not already set. 62751078Speter */ 62860471Snyan sio_setreg(com, com_ier, IER_ETXRDY); 62951078Speter 63051078Speter /* 63151078Speter * On some 16x50 incompatibles, setting IER_ETXRDY doesn't generate 63251078Speter * an interrupt. They'd better generate one for actually doing 63351078Speter * output. Loopback may be broken on the same incompatibles but 63451078Speter * it's unlikely to do more than allow the null byte out. 63551078Speter */ 63660471Snyan sio_setreg(com, com_data, 0); 637120468Sbde if (iobase == siocniobase) 638120468Sbde DELAY((1 + 2) * 1000000 / (comdefaultrate / 10)); 639120468Sbde else 640120468Sbde DELAY((1 + 2) * 1000000 / (SIO_TEST_SPEED / 10)); 64151078Speter 64251078Speter /* 64351078Speter * Turn off loopback mode so that the interrupt gate works again 64451078Speter * (MCR_IENABLE was hidden). This should leave the device driving 64551078Speter * an interrupt line high. It doesn't matter if the interrupt 64651078Speter * line oscillates while we are not looking at it, since interrupts 64751078Speter * are disabled. 64851078Speter */ 64951078Speter/* EXTRA DELAY? */ 65060471Snyan sio_setreg(com, com_mcr, mcr_image); 65192401Simp 65292401Simp /* 65392401Simp * It seems my Xircom CBEM56G Cardbus modem wants to be reset 65492401Simp * to 8 bits *again*, or else probe test 0 will fail. 65592401Simp * gwk@sgi.com, 4/19/2001 65692401Simp */ 65792401Simp sio_setreg(com, com_cfcr, CFCR_8BITS); 65851078Speter 65951078Speter /* 660120189Sbde * Some PCMCIA cards (Palido 321s, DC-1S, ...) have the "TXRDY bug", 661120189Sbde * so we probe for a buggy IIR_TXRDY implementation even in the 662120189Sbde * noprobe case. We don't probe for it in the !noprobe case because 663120189Sbde * noprobe is always set for PCMCIA cards and the problem is not 664120189Sbde * known to affect any other cards. 66551078Speter */ 66685365Simp if (noprobe) { 667120189Sbde /* Read IIR a few times. */ 66853370Speter for (fn = 0; fn < 2; fn ++) { 66953370Speter DELAY(10000); 67060471Snyan failures[6] = sio_getreg(com, com_iir); 67153370Speter } 672120189Sbde 673120189Sbde /* IIR_TXRDY should be clear. Is it? */ 67453370Speter result = 0; 67553370Speter if (failures[6] & IIR_TXRDY) { 676120189Sbde /* 677120189Sbde * No. We seem to have the bug. Does our fix for 678120189Sbde * it work? 679120189Sbde */ 68060471Snyan sio_setreg(com, com_ier, 0); 68160471Snyan if (sio_getreg(com, com_iir) & IIR_NOPEND) { 682120189Sbde /* Yes. We discovered the TXRDY bug! */ 68353370Speter SET_FLAG(dev, COM_C_IIR_TXRDYBUG); 68453370Speter } else { 685120189Sbde /* No. Just fail. XXX */ 68653370Speter result = ENXIO; 68781793Simp sio_setreg(com, com_mcr, 0); 68853370Speter } 68951078Speter } else { 690120189Sbde /* Yes. No bug. */ 69153370Speter CLR_FLAG(dev, COM_C_IIR_TXRDYBUG); 69251078Speter } 69381793Simp sio_setreg(com, com_ier, 0); 69460471Snyan sio_setreg(com, com_cfcr, CFCR_8BITS); 69572200Sbmilekic mtx_unlock_spin(&sio_lock); 69653344Speter bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 697128899Sambrisko if (iobase == siocniobase) 69886909Simp result = 0; 69986909Simp if (result != 0) { 70086909Simp device_set_softc(dev, NULL); 70186909Simp free(com, M_DEVBUF); 70286909Simp } 703160420Simp return (result == 0 ? BUS_PROBE_DEFAULT + 1 : result); 70453344Speter } 70553344Speter 70651078Speter /* 70751078Speter * Check that 70851078Speter * o the CFCR, IER and MCR in UART hold the values written to them 70951078Speter * (the values happen to be all distinct - this is good for 71051078Speter * avoiding false positive tests from bus echoes). 71151078Speter * o an output interrupt is generated and its vector is correct. 71251078Speter * o the interrupt goes away when the IIR in the UART is read. 71351078Speter */ 71451078Speter/* EXTRA DELAY? */ 71560471Snyan failures[0] = sio_getreg(com, com_cfcr) - CFCR_8BITS; 71660471Snyan failures[1] = sio_getreg(com, com_ier) - IER_ETXRDY; 717112270Ssobomax failures[2] = sio_getreg(com, com_mcr) - mcr_image; 71851078Speter DELAY(10000); /* Some internal modems need this time */ 71951078Speter irqmap[1] = isa_irq_pending(); 72060471Snyan failures[4] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_TXRDY; 72151078Speter DELAY(1000); /* XXX */ 72251078Speter irqmap[2] = isa_irq_pending(); 72360471Snyan failures[6] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 72451078Speter 72551078Speter /* 72651078Speter * Turn off all device interrupts and check that they go off properly. 72751078Speter * Leave MCR_IENABLE alone. For ports without a master port, it gates 72851078Speter * the OUT2 output of the UART to 72951078Speter * the ICU input. Closing the gate would give a floating ICU input 73051078Speter * (unless there is another device driving it) and spurious interrupts. 73151078Speter * (On the system that this was first tested on, the input floats high 73251078Speter * and gives a (masked) interrupt as soon as the gate is closed.) 73351078Speter */ 73460471Snyan sio_setreg(com, com_ier, 0); 73560471Snyan sio_setreg(com, com_cfcr, CFCR_8BITS); /* dummy to avoid bus echo */ 73660471Snyan failures[7] = sio_getreg(com, com_ier); 73751078Speter DELAY(1000); /* XXX */ 73851078Speter irqmap[3] = isa_irq_pending(); 73960471Snyan failures[9] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; 74051078Speter 74172200Sbmilekic mtx_unlock_spin(&sio_lock); 74251078Speter 74351078Speter irqs = irqmap[1] & ~irqmap[0]; 74454194Speter if (bus_get_resource(idev, SYS_RES_IRQ, 0, &xirq, NULL) == 0 && 74589463Simp ((1 << xirq) & irqs) == 0) { 74651078Speter printf( 74754206Speter "sio%d: configured irq %ld not in bitmap of probed irqs %#x\n", 74853344Speter device_get_unit(dev), xirq, irqs); 74989447Sbmah printf( 75089470Sbmah "sio%d: port may not be enabled\n", 75189447Sbmah device_get_unit(dev)); 75289463Simp } 75351078Speter if (bootverbose) 75451078Speter printf("sio%d: irq maps: %#x %#x %#x %#x\n", 75551078Speter device_get_unit(dev), 75651078Speter irqmap[0], irqmap[1], irqmap[2], irqmap[3]); 75751078Speter 758128899Sambrisko result = 0; 759128899Sambrisko for (fn = 0; fn < sizeof failures; ++fn) 76051078Speter if (failures[fn]) { 76160471Snyan sio_setreg(com, com_mcr, 0); 76251078Speter result = ENXIO; 76351078Speter if (bootverbose) { 76451078Speter printf("sio%d: probe failed test(s):", 76551078Speter device_get_unit(dev)); 76651078Speter for (fn = 0; fn < sizeof failures; ++fn) 76751078Speter if (failures[fn]) 76851078Speter printf(" %d", fn); 76951078Speter printf("\n"); 77051078Speter } 77151078Speter break; 77251078Speter } 77351078Speter bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 774128899Sambrisko if (iobase == siocniobase) 77586909Simp result = 0; 77686909Simp if (result != 0) { 77786909Simp device_set_softc(dev, NULL); 77886909Simp free(com, M_DEVBUF); 77986909Simp } 780160420Simp return (result == 0 ? BUS_PROBE_DEFAULT + 1 : result); 78151078Speter} 78251078Speter 78351078Speter#ifdef COM_ESP 78451078Speterstatic int 78551078Speterespattach(com, esp_port) 78651078Speter struct com_s *com; 78751078Speter Port_t esp_port; 78851078Speter{ 78951078Speter u_char dips; 79051078Speter u_char val; 79151078Speter 79251078Speter /* 79351078Speter * Check the ESP-specific I/O port to see if we're an ESP 79451078Speter * card. If not, return failure immediately. 79551078Speter */ 79651078Speter if ((inb(esp_port) & 0xf3) == 0) { 79751078Speter printf(" port 0x%x is not an ESP board?\n", esp_port); 79851078Speter return (0); 79951078Speter } 80051078Speter 80151078Speter /* 80251078Speter * We've got something that claims to be a Hayes ESP card. 80351078Speter * Let's hope so. 80451078Speter */ 80551078Speter 80651078Speter /* Get the dip-switch configuration */ 80751078Speter outb(esp_port + ESP_CMD1, ESP_GETDIPS); 80851078Speter dips = inb(esp_port + ESP_STATUS1); 80951078Speter 81051078Speter /* 81151078Speter * Bits 0,1 of dips say which COM port we are. 81251078Speter */ 81360471Snyan if (rman_get_start(com->ioportres) == likely_com_ports[dips & 0x03]) 81451078Speter printf(" : ESP"); 81551078Speter else { 81651078Speter printf(" esp_port has com %d\n", dips & 0x03); 81751078Speter return (0); 81851078Speter } 81951078Speter 82051078Speter /* 82151078Speter * Check for ESP version 2.0 or later: bits 4,5,6 = 010. 82251078Speter */ 82351078Speter outb(esp_port + ESP_CMD1, ESP_GETTEST); 82451078Speter val = inb(esp_port + ESP_STATUS1); /* clear reg 1 */ 82551078Speter val = inb(esp_port + ESP_STATUS2); 82651078Speter if ((val & 0x70) < 0x20) { 82751078Speter printf("-old (%o)", val & 0x70); 82851078Speter return (0); 82951078Speter } 83051078Speter 83151078Speter /* 83251078Speter * Check for ability to emulate 16550: bit 7 == 1 83351078Speter */ 83451078Speter if ((dips & 0x80) == 0) { 83551078Speter printf(" slave"); 83651078Speter return (0); 83751078Speter } 83851078Speter 83951078Speter /* 84051078Speter * Okay, we seem to be a Hayes ESP card. Whee. 84151078Speter */ 84251078Speter com->esp = TRUE; 84351078Speter com->esp_port = esp_port; 84451078Speter return (1); 84551078Speter} 84651078Speter#endif /* COM_ESP */ 84751078Speter 84885365Simpint 84989986Sjhaysioattach(dev, xrid, rclk) 85051078Speter device_t dev; 85158885Simp int xrid; 85289986Sjhay u_long rclk; 85351078Speter{ 85451078Speter struct com_s *com; 85551078Speter#ifdef COM_ESP 85651078Speter Port_t *espp; 85751078Speter#endif 85851078Speter Port_t iobase; 85951078Speter int unit; 86053344Speter u_int flags; 86151078Speter int rid; 86251078Speter struct resource *port; 86353344Speter int ret; 864136478Sphk int error; 865135329Sphk struct tty *tp; 86651078Speter 86758885Simp rid = xrid; 86851078Speter port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 86951078Speter 0, ~0, IO_COMSIZE, RF_ACTIVE); 87051078Speter if (!port) 87157915Simp return (ENXIO); 87251078Speter 87351078Speter iobase = rman_get_start(port); 87451078Speter unit = device_get_unit(dev); 87551078Speter com = device_get_softc(dev); 87653344Speter flags = device_get_flags(dev); 87751078Speter 87853344Speter if (unit >= sio_numunits) 87953344Speter sio_numunits = unit + 1; 88051078Speter /* 88151078Speter * sioprobe() has initialized the device registers as follows: 88251078Speter * o cfcr = CFCR_8BITS. 88351078Speter * It is most important that CFCR_DLAB is off, so that the 88451078Speter * data port is not hidden when we enable interrupts. 88551078Speter * o ier = 0. 88651078Speter * Interrupts are only enabled when the line is open. 88751078Speter * o mcr = MCR_IENABLE, or 0 if the port has AST/4 compatible 88851078Speter * interrupt control register or the config specifies no irq. 88951078Speter * Keeping MCR_DTR and MCR_RTS off might stop the external 89051078Speter * device from sending before we are ready. 89151078Speter */ 89251078Speter bzero(com, sizeof *com); 89351078Speter com->unit = unit; 89451078Speter com->ioportres = port; 895116120Sscottl com->ioportrid = rid; 89660471Snyan com->bst = rman_get_bustag(port); 89760471Snyan com->bsh = rman_get_bushandle(port); 89851078Speter com->cfcr_image = CFCR_8BITS; 89951078Speter com->loses_outints = COM_LOSESOUTINTS(flags) != 0; 90057234Sbde com->no_irq = bus_get_resource(dev, SYS_RES_IRQ, 0, NULL, NULL) != 0; 90151078Speter com->tx_fifo_size = 1; 90251078Speter com->obufs[0].l_head = com->obuf1; 90351078Speter com->obufs[1].l_head = com->obuf2; 90451078Speter 90551078Speter com->data_port = iobase + com_data; 906120189Sbde com->int_ctl_port = iobase + com_ier; 90751078Speter com->int_id_port = iobase + com_iir; 90851078Speter com->modem_ctl_port = iobase + com_mcr; 90951078Speter com->mcr_image = inb(com->modem_ctl_port); 91051078Speter com->line_status_port = iobase + com_lsr; 91151078Speter com->modem_status_port = iobase + com_msr; 91251078Speter 913135367Sphk tp = com->tp = ttyalloc(); 914135329Sphk tp->t_oproc = comstart; 915135329Sphk tp->t_param = comparam; 916135329Sphk tp->t_stop = comstop; 917135329Sphk tp->t_modem = commodem; 918135329Sphk tp->t_break = combreak; 919136478Sphk tp->t_close = comclose; 920136478Sphk tp->t_open = comopen; 921135329Sphk tp->t_sc = com; 922135329Sphk 92389986Sjhay if (rclk == 0) 92489986Sjhay rclk = DEFAULT_RCLK; 92589986Sjhay com->rclk = rclk; 92689986Sjhay 927136478Sphk if (unit == comconsole) 928136450Sphk ttyconsolemode(tp, comdefaultrate); 929136478Sphk error = siosetwater(com, tp->t_init_in.c_ispeed); 930136478Sphk mtx_unlock_spin(&sio_lock); 931136478Sphk if (error) { 93256788Sbde /* 93356788Sbde * Leave i/o resources allocated if this is a `cn'-level 93456788Sbde * console, so that other devices can't snarf them. 93556788Sbde */ 93656788Sbde if (iobase != siocniobase) 93756788Sbde bus_release_resource(dev, SYS_RES_IOPORT, rid, port); 93856788Sbde return (ENOMEM); 93951078Speter } 94051078Speter 94151078Speter /* attempt to determine UART type */ 94251078Speter printf("sio%d: type", unit); 94351078Speter 944104067Sphk if (!COM_ISMULTIPORT(flags) && 945104067Sphk !COM_IIR_TXRDYBUG(flags) && !COM_NOSCR(flags)) { 94651078Speter u_char scr; 94751078Speter u_char scr1; 94851078Speter u_char scr2; 94951078Speter 95060471Snyan scr = sio_getreg(com, com_scr); 95160471Snyan sio_setreg(com, com_scr, 0xa5); 95260471Snyan scr1 = sio_getreg(com, com_scr); 95360471Snyan sio_setreg(com, com_scr, 0x5a); 95460471Snyan scr2 = sio_getreg(com, com_scr); 95560471Snyan sio_setreg(com, com_scr, scr); 95651078Speter if (scr1 != 0xa5 || scr2 != 0x5a) { 95789447Sbmah printf(" 8250 or not responding"); 95851078Speter goto determined_type; 95951078Speter } 96051078Speter } 96160471Snyan sio_setreg(com, com_fifo, FIFO_ENABLE | FIFO_RX_HIGH); 96251078Speter DELAY(100); 96351078Speter switch (inb(com->int_id_port) & IIR_FIFO_MASK) { 96451078Speter case FIFO_RX_LOW: 96551078Speter printf(" 16450"); 96651078Speter break; 96751078Speter case FIFO_RX_MEDL: 96851078Speter printf(" 16450?"); 96951078Speter break; 97051078Speter case FIFO_RX_MEDH: 97151078Speter printf(" 16550?"); 97251078Speter break; 97351078Speter case FIFO_RX_HIGH: 97451078Speter if (COM_NOFIFO(flags)) { 97551078Speter printf(" 16550A fifo disabled"); 976120173Sbde break; 97751078Speter } 978120173Sbde com->hasfifo = TRUE; 979120173Sbde if (COM_ST16650A(flags)) { 980120173Sbde printf(" ST16650A"); 981120173Sbde com->st16650a = TRUE; 982120173Sbde com->tx_fifo_size = 32; 983120173Sbde break; 984120173Sbde } 985120173Sbde if (COM_TI16754(flags)) { 986120173Sbde printf(" TI16754"); 987120173Sbde com->tx_fifo_size = 64; 988120173Sbde break; 989120173Sbde } 990120173Sbde printf(" 16550A"); 99151078Speter#ifdef COM_ESP 99251078Speter for (espp = likely_esp_ports; *espp != 0; espp++) 99351078Speter if (espattach(com, *espp)) { 99451078Speter com->tx_fifo_size = 1024; 99551078Speter break; 99651078Speter } 997123796Sbde if (com->esp) 998120173Sbde break; 99951078Speter#endif 1000120173Sbde com->tx_fifo_size = COM_FIFOSIZE(flags); 1001120173Sbde if (com->tx_fifo_size == 0) 1002120173Sbde com->tx_fifo_size = 16; 1003120173Sbde else 1004120173Sbde printf(" lookalike with %u bytes FIFO", 1005120173Sbde com->tx_fifo_size); 100651078Speter break; 100751078Speter } 100851078Speter#ifdef COM_ESP 1009123796Sbde if (com->esp) { 101051078Speter /* 101151078Speter * Set 16550 compatibility mode. 101251078Speter * We don't use the ESP_MODE_SCALE bit to increase the 101351078Speter * fifo trigger levels because we can't handle large 101451078Speter * bursts of input. 101551078Speter * XXX flow control should be set in comparam(), not here. 101651078Speter */ 101751078Speter outb(com->esp_port + ESP_CMD1, ESP_SETMODE); 101851078Speter outb(com->esp_port + ESP_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO); 101951078Speter 102051078Speter /* Set RTS/CTS flow control. */ 102151078Speter outb(com->esp_port + ESP_CMD1, ESP_SETFLOWTYPE); 102251078Speter outb(com->esp_port + ESP_CMD2, ESP_FLOW_RTS); 102351078Speter outb(com->esp_port + ESP_CMD2, ESP_FLOW_CTS); 102451078Speter 102551078Speter /* Set flow-control levels. */ 102651078Speter outb(com->esp_port + ESP_CMD1, ESP_SETRXFLOW); 102751078Speter outb(com->esp_port + ESP_CMD2, HIBYTE(768)); 102851078Speter outb(com->esp_port + ESP_CMD2, LOBYTE(768)); 102951078Speter outb(com->esp_port + ESP_CMD2, HIBYTE(512)); 103051078Speter outb(com->esp_port + ESP_CMD2, LOBYTE(512)); 103151078Speter } 103251078Speter#endif /* COM_ESP */ 103360471Snyan sio_setreg(com, com_fifo, 0); 103451078Speterdetermined_type: ; 103551078Speter 103651078Speter#ifdef COM_MULTIPORT 103751078Speter if (COM_ISMULTIPORT(flags)) { 103853344Speter device_t masterdev; 103953344Speter 104051078Speter com->multiport = TRUE; 104151078Speter printf(" (multiport"); 104251078Speter if (unit == COM_MPMASTER(flags)) 104351078Speter printf(" master"); 104451078Speter printf(")"); 104553344Speter masterdev = devclass_get_device(sio_devclass, 104653344Speter COM_MPMASTER(flags)); 104757234Sbde com->no_irq = (masterdev == NULL || bus_get_resource(masterdev, 104857234Sbde SYS_RES_IRQ, 0, NULL, NULL) != 0); 104951078Speter } 105051078Speter#endif /* COM_MULTIPORT */ 105151078Speter if (unit == comconsole) 105251078Speter printf(", console"); 105353344Speter if (COM_IIR_TXRDYBUG(flags)) 1054120189Sbde printf(" with a buggy IIR_TXRDY implementation"); 105551078Speter printf("\n"); 105651078Speter 105767551Sjhb if (sio_fast_ih == NULL) { 1058151658Sjhb swi_add(&tty_intr_event, "sio", siopoll, NULL, SWI_TTY, 0, 105972238Sjhb &sio_fast_ih); 1060151658Sjhb swi_add(&clk_intr_event, "sio", siopoll, NULL, SWI_CLOCK, 0, 106172238Sjhb &sio_slow_ih); 106251078Speter } 1063136478Sphk 106451078Speter com->flags = flags; 106551078Speter com->pps.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR; 1066136478Sphk tp->t_pps = &com->pps; 1067111613Sphk 1068111613Sphk if (COM_PPSCTS(flags)) 1069111613Sphk com->pps_bit = MSR_CTS; 1070111613Sphk else 1071111613Sphk com->pps_bit = MSR_DCD; 107251078Speter pps_init(&com->pps); 107351078Speter 107451078Speter rid = 0; 1075127135Snjl com->irqres = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE); 107653344Speter if (com->irqres) { 1077155921Sjhb ret = bus_setup_intr(dev, com->irqres, 1078166901Spiso INTR_TYPE_TTY, 1079166901Spiso siointr, NULL, com, 1080166901Spiso &com->cookie); 108154194Speter if (ret) { 1082155921Sjhb ret = bus_setup_intr(dev, 108354194Speter com->irqres, INTR_TYPE_TTY, 1084166901Spiso NULL, (driver_intr_t *)siointr, com, &com->cookie); 108554194Speter if (ret == 0) 108683246Sdd device_printf(dev, "unable to activate interrupt in fast mode - using normal mode\n"); 108754194Speter } 108853344Speter if (ret) 108953344Speter device_printf(dev, "could not activate interrupt\n"); 1090131939Smarcel#if defined(KDB) && (defined(BREAK_TO_DEBUGGER) || \ 1091127157Snjl defined(ALT_BREAK_TO_DEBUGGER)) 109278504Siedowse /* 109378504Siedowse * Enable interrupts for early break-to-debugger support 1094127157Snjl * on the console. 109578504Siedowse */ 1096127157Snjl if (ret == 0 && unit == comconsole) 109778504Siedowse outb(siocniobase + com_ier, IER_ERXRDY | IER_ERLS | 109878504Siedowse IER_EMSC); 109978504Siedowse#endif 110053344Speter } 110151078Speter 1102136478Sphk /* We're ready, open the doors... */ 1103151383Sphk ttycreate(tp, TS_CALLOUT, "d%r", unit); 110451078Speter 1105130872Sphk return (0); 1106130872Sphk} 1107130872Sphk 1108130872Sphkstatic int 1109136478Sphkcomopen(struct tty *tp, struct cdev *dev) 111051078Speter{ 111151078Speter struct com_s *com; 1112136478Sphk int i; 111351078Speter 1114136478Sphk com = tp->t_sc; 1115136478Sphk com->poll = com->no_irq; 1116136478Sphk com->poll_output = com->loses_outints; 1117136478Sphk if (com->hasfifo) { 111851078Speter /* 1119136478Sphk * (Re)enable and drain fifos. 1120136478Sphk * 1121136478Sphk * Certain SMC chips cause problems if the fifos 1122136478Sphk * are enabled while input is ready. Turn off the 1123136478Sphk * fifo if necessary to clear the input. We test 1124136478Sphk * the input ready bit after enabling the fifos 1125136478Sphk * since we've already enabled them in comparam() 1126136478Sphk * and to handle races between enabling and fresh 1127136478Sphk * input. 112851078Speter */ 1129136478Sphk for (i = 0; i < 500; i++) { 1130136478Sphk sio_setreg(com, com_fifo, 1131136478Sphk FIFO_RCV_RST | FIFO_XMT_RST 1132136478Sphk | com->fifo_image); 113351078Speter /* 1134136478Sphk * XXX the delays are for superstitious 1135136478Sphk * historical reasons. It must be less than 1136136478Sphk * the character time at the maximum 1137136478Sphk * supported speed (87 usec at 115200 bps 1138136478Sphk * 8N1). Otherwise we might loop endlessly 1139136478Sphk * if data is streaming in. We used to use 1140136478Sphk * delays of 100. That usually worked 1141136478Sphk * because DELAY(100) used to usually delay 1142136478Sphk * for about 85 usec instead of 100. 114351078Speter */ 1144136478Sphk DELAY(50); 1145136478Sphk if (!(inb(com->line_status_port) & LSR_RXRDY)) 1146136478Sphk break; 1147136478Sphk sio_setreg(com, com_fifo, 0); 1148136478Sphk DELAY(50); 1149136478Sphk (void) inb(com->data_port); 115051078Speter } 1151136478Sphk if (i == 500) 1152136478Sphk return (EIO); 115351078Speter } 115451078Speter 1155136478Sphk mtx_lock_spin(&sio_lock); 1156136478Sphk (void) inb(com->line_status_port); 1157136478Sphk (void) inb(com->data_port); 1158136478Sphk com->prev_modem_status = com->last_modem_status 1159136478Sphk = inb(com->modem_status_port); 1160136478Sphk outb(com->int_ctl_port, 1161136478Sphk IER_ERXRDY | IER_ERLS | IER_EMSC 1162136478Sphk | (COM_IIR_TXRDYBUG(com->flags) ? 0 : IER_ETXRDY)); 1163136478Sphk mtx_unlock_spin(&sio_lock); 116451078Speter siosettimeout(); 1165136478Sphk /* XXX: should be generic ? */ 1166136478Sphk if (com->prev_modem_status & MSR_DCD || ISCALLOUT(dev)) 1167136478Sphk ttyld_modem(tp, 1); 116851078Speter return (0); 116951078Speter} 117051078Speter 117151078Speterstatic void 1172136478Sphkcomclose(tp) 1173136478Sphk struct tty *tp; 117451078Speter{ 117551078Speter int s; 1176136478Sphk struct com_s *com; 117751078Speter 117851078Speter s = spltty(); 1179136478Sphk com = tp->t_sc; 118051078Speter com->poll = FALSE; 118151078Speter com->poll_output = FALSE; 118260471Snyan sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 118378504Siedowse 1184131939Smarcel#if defined(KDB) && (defined(BREAK_TO_DEBUGGER) || \ 1185127157Snjl defined(ALT_BREAK_TO_DEBUGGER)) 118678504Siedowse /* 118778504Siedowse * Leave interrupts enabled and don't clear DTR if this is the 118878504Siedowse * console. This allows us to detect break-to-debugger events 118978504Siedowse * while the console device is closed. 119078504Siedowse */ 1191127157Snjl if (com->unit != comconsole) 119278504Siedowse#endif 119351078Speter { 119460471Snyan sio_setreg(com, com_ier, 0); 119551078Speter if (tp->t_cflag & HUPCL 119651078Speter /* 119751078Speter * XXX we will miss any carrier drop between here and the 119851078Speter * next open. Perhaps we should watch DCD even when the 119951078Speter * port is closed; it is not sufficient to check it at 120051078Speter * the next open because it might go up and down while 120151078Speter * we're not watching. 120251078Speter */ 1203136478Sphk || (!tp->t_actout 120451078Speter && !(com->prev_modem_status & MSR_DCD) 1205135329Sphk && !(tp->t_init_in.c_cflag & CLOCAL)) 120651078Speter || !(tp->t_state & TS_ISOPEN)) { 1207131094Sphk (void)commodem(tp, 0, SER_DTR); 1208131981Sphk ttydtrwaitstart(tp); 120951078Speter } 121051078Speter } 121151078Speter if (com->hasfifo) { 121251078Speter /* 121351078Speter * Disable fifos so that they are off after controlled 121451078Speter * reboots. Some BIOSes fail to detect 16550s when the 121551078Speter * fifos are enabled. 121651078Speter */ 121760471Snyan sio_setreg(com, com_fifo, 0); 121851078Speter } 1219136478Sphk tp->t_actout = FALSE; 1220136478Sphk wakeup(&tp->t_actout); 122151078Speter wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */ 1222136478Sphk siosettimeout(); 122351078Speter splx(s); 122451078Speter} 122551078Speter 122651078Speterstatic void 122751078Spetersiobusycheck(chan) 122851078Speter void *chan; 122951078Speter{ 123051078Speter struct com_s *com; 123151078Speter int s; 123251078Speter 123351078Speter com = (struct com_s *)chan; 123451078Speter 123551078Speter /* 123651078Speter * Clear TS_BUSY if low-level output is complete. 123751078Speter * spl locking is sufficient because siointr1() does not set CS_BUSY. 123851078Speter * If siointr1() clears CS_BUSY after we look at it, then we'll get 123951078Speter * called again. Reading the line status port outside of siointr1() 124051078Speter * is safe because CS_BUSY is clear so there are no output interrupts 124151078Speter * to lose. 124251078Speter */ 124351078Speter s = spltty(); 124451078Speter if (com->state & CS_BUSY) 124551078Speter com->extra_state &= ~CSE_BUSYCHECK; /* False alarm. */ 124651078Speter else if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) 124751078Speter == (LSR_TSRE | LSR_TXRDY)) { 124851078Speter com->tp->t_state &= ~TS_BUSY; 124951078Speter ttwwakeup(com->tp); 125051078Speter com->extra_state &= ~CSE_BUSYCHECK; 125151078Speter } else 125251078Speter timeout(siobusycheck, com, hz / 100); 125351078Speter splx(s); 125451078Speter} 125551078Speter 125689986Sjhaystatic u_int 125789986Sjhaysiodivisor(rclk, speed) 125889986Sjhay u_long rclk; 125989986Sjhay speed_t speed; 126089986Sjhay{ 126189986Sjhay long actual_speed; 126289986Sjhay u_int divisor; 126389986Sjhay int error; 126489986Sjhay 1265114334Speter if (speed == 0) 126689986Sjhay return (0); 1267114334Speter#if UINT_MAX > (ULONG_MAX - 1) / 8 1268114334Speter if (speed > (ULONG_MAX - 1) / 8) 1269114334Speter return (0); 1270114334Speter#endif 127189986Sjhay divisor = (rclk / (8UL * speed) + 1) / 2; 127289986Sjhay if (divisor == 0 || divisor >= 65536) 127389986Sjhay return (0); 127489986Sjhay actual_speed = rclk / (16UL * divisor); 127589986Sjhay 127689986Sjhay /* 10 times error in percent: */ 127789986Sjhay error = ((actual_speed - (long)speed) * 2000 / (long)speed + 1) / 2; 127889986Sjhay 127989986Sjhay /* 3.0% maximum error tolerance: */ 128089986Sjhay if (error < -30 || error > 30) 128189986Sjhay return (0); 128289986Sjhay 128389986Sjhay return (divisor); 128489986Sjhay} 128589986Sjhay 128665557Sjasone/* 128770174Sjhb * Call this function with the sio_lock mutex held. It will return with the 128870174Sjhb * lock still held. 128965557Sjasone */ 129051078Speterstatic void 129151078Spetersioinput(com) 129251078Speter struct com_s *com; 129351078Speter{ 129451078Speter u_char *buf; 129551078Speter int incc; 129651078Speter u_char line_status; 129751078Speter int recv_data; 129851078Speter struct tty *tp; 129951078Speter 130051078Speter buf = com->ibuf; 130151078Speter tp = com->tp; 130251078Speter if (!(tp->t_state & TS_ISOPEN) || !(tp->t_cflag & CREAD)) { 130351078Speter com_events -= (com->iptr - com->ibuf); 130451078Speter com->iptr = com->ibuf; 130551078Speter return; 130651078Speter } 130751078Speter if (tp->t_state & TS_CAN_BYPASS_L_RINT) { 130851078Speter /* 130951078Speter * Avoid the grotesquely inefficient lineswitch routine 131051078Speter * (ttyinput) in "raw" mode. It usually takes about 450 131151078Speter * instructions (that's without canonical processing or echo!). 131251078Speter * slinput is reasonably fast (usually 40 instructions plus 131351078Speter * call overhead). 131451078Speter */ 131551078Speter do { 131665557Sjasone /* 131765557Sjasone * This may look odd, but it is using save-and-enable 131865557Sjasone * semantics instead of the save-and-disable semantics 131965557Sjasone * that are used everywhere else. 132065557Sjasone */ 132172200Sbmilekic mtx_unlock_spin(&sio_lock); 132251078Speter incc = com->iptr - buf; 132351078Speter if (tp->t_rawq.c_cc + incc > tp->t_ihiwat 132451078Speter && (com->state & CS_RTS_IFLOW 132551078Speter || tp->t_iflag & IXOFF) 132651078Speter && !(tp->t_state & TS_TBLOCK)) 132751078Speter ttyblock(tp); 132851078Speter com->delta_error_counts[CE_TTY_BUF_OVERFLOW] 132951078Speter += b_to_q((char *)buf, incc, &tp->t_rawq); 133051078Speter buf += incc; 133151078Speter tk_nin += incc; 133251078Speter tk_rawcc += incc; 133351078Speter tp->t_rawcc += incc; 133451078Speter ttwakeup(tp); 133551078Speter if (tp->t_state & TS_TTSTOP 133651078Speter && (tp->t_iflag & IXANY 133751078Speter || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) { 133851078Speter tp->t_state &= ~TS_TTSTOP; 133951078Speter tp->t_lflag &= ~FLUSHO; 134051078Speter comstart(tp); 134151078Speter } 134272200Sbmilekic mtx_lock_spin(&sio_lock); 134351078Speter } while (buf < com->iptr); 134451078Speter } else { 134551078Speter do { 134665557Sjasone /* 134765557Sjasone * This may look odd, but it is using save-and-enable 134865557Sjasone * semantics instead of the save-and-disable semantics 134965557Sjasone * that are used everywhere else. 135065557Sjasone */ 135172200Sbmilekic mtx_unlock_spin(&sio_lock); 135251078Speter line_status = buf[com->ierroff]; 135351078Speter recv_data = *buf++; 135451078Speter if (line_status 135551078Speter & (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) { 135651078Speter if (line_status & LSR_BI) 135751078Speter recv_data |= TTY_BI; 135851078Speter if (line_status & LSR_FE) 135951078Speter recv_data |= TTY_FE; 136051078Speter if (line_status & LSR_OE) 136151078Speter recv_data |= TTY_OE; 136251078Speter if (line_status & LSR_PE) 136351078Speter recv_data |= TTY_PE; 136451078Speter } 1365130077Sphk ttyld_rint(tp, recv_data); 136672200Sbmilekic mtx_lock_spin(&sio_lock); 136751078Speter } while (buf < com->iptr); 136851078Speter } 136951078Speter com_events -= (com->iptr - com->ibuf); 137051078Speter com->iptr = com->ibuf; 137151078Speter 137251078Speter /* 137351078Speter * There is now room for another low-level buffer full of input, 137451078Speter * so enable RTS if it is now disabled and there is room in the 137551078Speter * high-level buffer. 137651078Speter */ 137751078Speter if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & MCR_RTS) && 137851078Speter !(tp->t_state & TS_TBLOCK)) 137951078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 138051078Speter} 138151078Speter 1382166901Spisostatic int 138351078Spetersiointr(arg) 138451078Speter void *arg; 138551078Speter{ 138670174Sjhb struct com_s *com; 138770174Sjhb 138851078Speter#ifndef COM_MULTIPORT 138970174Sjhb com = (struct com_s *)arg; 139070174Sjhb 139172200Sbmilekic mtx_lock_spin(&sio_lock); 139270174Sjhb siointr1(com); 139372200Sbmilekic mtx_unlock_spin(&sio_lock); 139451078Speter#else /* COM_MULTIPORT */ 139551078Speter bool_t possibly_more_intrs; 139651078Speter int unit; 139751078Speter 139851078Speter /* 139951078Speter * Loop until there is no activity on any port. This is necessary 140051078Speter * to get an interrupt edge more than to avoid another interrupt. 140151078Speter * If the IRQ signal is just an OR of the IRQ signals from several 140251078Speter * devices, then the edge from one may be lost because another is 140351078Speter * on. 140451078Speter */ 140572200Sbmilekic mtx_lock_spin(&sio_lock); 140651078Speter do { 140751078Speter possibly_more_intrs = FALSE; 140853344Speter for (unit = 0; unit < sio_numunits; ++unit) { 140951078Speter com = com_addr(unit); 141051078Speter /* 141151078Speter * XXX COM_LOCK(); 141251078Speter * would it work here, or be counter-productive? 141351078Speter */ 141451078Speter if (com != NULL 141551078Speter && !com->gone 141651078Speter && (inb(com->int_id_port) & IIR_IMASK) 141751078Speter != IIR_NOPEND) { 141851078Speter siointr1(com); 141951078Speter possibly_more_intrs = TRUE; 142051078Speter } 142151078Speter /* XXX COM_UNLOCK(); */ 142251078Speter } 142351078Speter } while (possibly_more_intrs); 142472200Sbmilekic mtx_unlock_spin(&sio_lock); 142551078Speter#endif /* COM_MULTIPORT */ 1426166901Spiso return(FILTER_HANDLED); 142751078Speter} 142851078Speter 1429122819Sbdestatic struct timespec siots[8]; 143093466Sbdestatic int siotso; 143193466Sbdestatic int volatile siotsunit = -1; 143293466Sbde 143393466Sbdestatic int 143493466Sbdesysctl_siots(SYSCTL_HANDLER_ARGS) 143593466Sbde{ 143693466Sbde char buf[128]; 143793466Sbde long long delta; 143893466Sbde size_t len; 1439122819Sbde int error, i, tso; 144093466Sbde 1441122819Sbde for (i = 1, tso = siotso; i < tso; i++) { 144293466Sbde delta = (long long)(siots[i].tv_sec - siots[i - 1].tv_sec) * 144393466Sbde 1000000000 + 144493466Sbde (siots[i].tv_nsec - siots[i - 1].tv_nsec); 144593466Sbde len = sprintf(buf, "%lld\n", delta); 144693466Sbde if (delta >= 110000) 144793466Sbde len += sprintf(buf + len - 1, ": *** %ld.%09ld\n", 1448122819Sbde (long)siots[i].tv_sec, siots[i].tv_nsec) - 1; 1449122819Sbde if (i == tso - 1) 145093466Sbde buf[len - 1] = '\0'; 145193466Sbde error = SYSCTL_OUT(req, buf, len); 145293466Sbde if (error != 0) 145393466Sbde return (error); 145493466Sbde uio_yield(); 145593466Sbde } 145693466Sbde return (0); 145793466Sbde} 145893466Sbde 145993466SbdeSYSCTL_PROC(_machdep, OID_AUTO, siots, CTLTYPE_STRING | CTLFLAG_RD, 146093466Sbde 0, 0, sysctl_siots, "A", "sio timestamps"); 146193466Sbde 146251078Speterstatic void 146351078Spetersiointr1(com) 146451078Speter struct com_s *com; 146551078Speter{ 1466120189Sbde u_char int_ctl; 1467120189Sbde u_char int_ctl_new; 146851078Speter u_char line_status; 146951078Speter u_char modem_status; 147051078Speter u_char *ioptr; 147151078Speter u_char recv_data; 147251078Speter 1473120091Sbde if (COM_IIR_TXRDYBUG(com->flags)) { 1474120189Sbde int_ctl = inb(com->int_ctl_port); 1475120091Sbde int_ctl_new = int_ctl; 1476120091Sbde } else { 1477120091Sbde int_ctl = 0; 1478120091Sbde int_ctl_new = 0; 1479120091Sbde } 148051078Speter 148151078Speter while (!com->gone) { 148251078Speter if (com->pps.ppsparam.mode & PPS_CAPTUREBOTH) { 148351078Speter modem_status = inb(com->modem_status_port); 1484111613Sphk if ((modem_status ^ com->last_modem_status) & 1485111613Sphk com->pps_bit) { 148695523Sphk pps_capture(&com->pps); 1487111613Sphk pps_event(&com->pps, 1488111616Sphk (modem_status & com->pps_bit) ? 148951078Speter PPS_CAPTUREASSERT : PPS_CAPTURECLEAR); 149051078Speter } 149151078Speter } 149251078Speter line_status = inb(com->line_status_port); 1493128020Simp 149451078Speter /* input event? (check first to help avoid overruns) */ 149551078Speter while (line_status & LSR_RCV_MASK) { 149651078Speter /* break/unnattached error bits or real input? */ 149751078Speter if (!(line_status & LSR_RXRDY)) 149851078Speter recv_data = 0; 149951078Speter else 150051078Speter recv_data = inb(com->data_port); 1501131939Smarcel#ifdef KDB 1502119485Snjl#ifdef ALT_BREAK_TO_DEBUGGER 1503119485Snjl if (com->unit == comconsole && 1504131939Smarcel kdb_alt_break(recv_data, &com->alt_brk_state) != 0) 1505131939Smarcel kdb_enter("Break sequence on console"); 1506119485Snjl#endif /* ALT_BREAK_TO_DEBUGGER */ 1507131939Smarcel#endif /* KDB */ 150851078Speter if (line_status & (LSR_BI | LSR_FE | LSR_PE)) { 150951078Speter /* 151051078Speter * Don't store BI if IGNBRK or FE/PE if IGNPAR. 151151078Speter * Otherwise, push the work to a higher level 151251078Speter * (to handle PARMRK) if we're bypassing. 151351078Speter * Otherwise, convert BI/FE and PE+INPCK to 0. 151451078Speter * 151551078Speter * This makes bypassing work right in the 151651078Speter * usual "raw" case (IGNBRK set, and IGNPAR 151751078Speter * and INPCK clear). 151851078Speter * 151951078Speter * Note: BI together with FE/PE means just BI. 152051078Speter */ 152151078Speter if (line_status & LSR_BI) { 1522131939Smarcel#if defined(KDB) && defined(BREAK_TO_DEBUGGER) 152351078Speter if (com->unit == comconsole) { 1524131939Smarcel kdb_enter("Line break on console"); 152551078Speter goto cont; 152651078Speter } 152751078Speter#endif 152851078Speter if (com->tp == NULL 152951078Speter || com->tp->t_iflag & IGNBRK) 153051078Speter goto cont; 153151078Speter } else { 153251078Speter if (com->tp == NULL 153351078Speter || com->tp->t_iflag & IGNPAR) 153451078Speter goto cont; 153551078Speter } 153651078Speter if (com->tp->t_state & TS_CAN_BYPASS_L_RINT 153751078Speter && (line_status & (LSR_BI | LSR_FE) 153851078Speter || com->tp->t_iflag & INPCK)) 153951078Speter recv_data = 0; 154051078Speter } 154151078Speter ++com->bytes_in; 1542131185Sphk if (com->tp != NULL && 1543131185Sphk com->tp->t_hotchar != 0 && recv_data == com->tp->t_hotchar) 154488900Sjhb swi_sched(sio_fast_ih, 0); 154551078Speter ioptr = com->iptr; 154651078Speter if (ioptr >= com->ibufend) 154751078Speter CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW); 154851078Speter else { 1549136478Sphk if (com->tp != NULL && com->tp->t_do_timestamp) 1550136478Sphk microtime(&com->tp->t_timestamp); 155151078Speter ++com_events; 155272238Sjhb swi_sched(sio_slow_ih, SWI_DELAY); 155351078Speter#if 0 /* for testing input latency vs efficiency */ 155451078Speterif (com->iptr - com->ibuf == 8) 155588900Sjhb swi_sched(sio_fast_ih, 0); 155651078Speter#endif 155751078Speter ioptr[0] = recv_data; 155851078Speter ioptr[com->ierroff] = line_status; 155951078Speter com->iptr = ++ioptr; 156051078Speter if (ioptr == com->ihighwater 156151078Speter && com->state & CS_RTS_IFLOW) 156251078Speter outb(com->modem_ctl_port, 156351078Speter com->mcr_image &= ~MCR_RTS); 156451078Speter if (line_status & LSR_OE) 156551078Speter CE_RECORD(com, CE_OVERRUN); 156651078Speter } 156751078Spetercont: 1568122844Sbde if (line_status & LSR_TXRDY 1569122844Sbde && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) 1570122844Sbde goto txrdy; 1571122844Sbde 157251078Speter /* 157351078Speter * "& 0x7F" is to avoid the gcc-1.40 generating a slow 157451078Speter * jump from the top of the loop to here 157551078Speter */ 157651078Speter line_status = inb(com->line_status_port) & 0x7F; 157751078Speter } 157851078Speter 157951078Speter /* modem status change? (always check before doing output) */ 158051078Speter modem_status = inb(com->modem_status_port); 158151078Speter if (modem_status != com->last_modem_status) { 158251078Speter /* 158351078Speter * Schedule high level to handle DCD changes. Note 158451078Speter * that we don't use the delta bits anywhere. Some 158551078Speter * UARTs mess them up, and it's easy to remember the 158651078Speter * previous bits and calculate the delta. 158751078Speter */ 158851078Speter com->last_modem_status = modem_status; 158951078Speter if (!(com->state & CS_CHECKMSR)) { 159051078Speter com_events += LOTS_OF_EVENTS; 159151078Speter com->state |= CS_CHECKMSR; 159288900Sjhb swi_sched(sio_fast_ih, 0); 159351078Speter } 159451078Speter 159551078Speter /* handle CTS change immediately for crisp flow ctl */ 159651078Speter if (com->state & CS_CTS_OFLOW) { 159751078Speter if (modem_status & MSR_CTS) 159851078Speter com->state |= CS_ODEVREADY; 159951078Speter else 160051078Speter com->state &= ~CS_ODEVREADY; 160151078Speter } 160251078Speter } 160351078Speter 1604122844Sbdetxrdy: 160551078Speter /* output queued and everything ready? */ 160651078Speter if (line_status & LSR_TXRDY 160751078Speter && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { 160851078Speter ioptr = com->obufq.l_head; 160993466Sbde if (com->tx_fifo_size > 1 && com->unit != siotsunit) { 161051078Speter u_int ocount; 161151078Speter 161251078Speter ocount = com->obufq.l_tail - ioptr; 161351078Speter if (ocount > com->tx_fifo_size) 161451078Speter ocount = com->tx_fifo_size; 161551078Speter com->bytes_out += ocount; 161651078Speter do 161751078Speter outb(com->data_port, *ioptr++); 161851078Speter while (--ocount != 0); 161951078Speter } else { 162051078Speter outb(com->data_port, *ioptr++); 162151078Speter ++com->bytes_out; 1622122819Sbde if (com->unit == siotsunit 1623122819Sbde && siotso < sizeof siots / sizeof siots[0]) 1624122819Sbde nanouptime(&siots[siotso++]); 162551078Speter } 162651078Speter com->obufq.l_head = ioptr; 1627120189Sbde if (COM_IIR_TXRDYBUG(com->flags)) 162851078Speter int_ctl_new = int_ctl | IER_ETXRDY; 162951078Speter if (ioptr >= com->obufq.l_tail) { 163051078Speter struct lbq *qp; 163151078Speter 163251078Speter qp = com->obufq.l_next; 163351078Speter qp->l_queued = FALSE; 163451078Speter qp = qp->l_next; 163551078Speter if (qp != NULL) { 163651078Speter com->obufq.l_head = qp->l_head; 163751078Speter com->obufq.l_tail = qp->l_tail; 163851078Speter com->obufq.l_next = qp; 163951078Speter } else { 164051078Speter /* output just completed */ 1641120189Sbde if (COM_IIR_TXRDYBUG(com->flags)) 1642120189Sbde int_ctl_new = int_ctl 1643120189Sbde & ~IER_ETXRDY; 164451078Speter com->state &= ~CS_BUSY; 164551078Speter } 164651078Speter if (!(com->state & CS_ODONE)) { 164751078Speter com_events += LOTS_OF_EVENTS; 164851078Speter com->state |= CS_ODONE; 164967551Sjhb /* handle at high level ASAP */ 165088900Sjhb swi_sched(sio_fast_ih, 0); 165151078Speter } 165251078Speter } 1653120189Sbde if (COM_IIR_TXRDYBUG(com->flags) 1654120189Sbde && int_ctl != int_ctl_new) 1655120189Sbde outb(com->int_ctl_port, int_ctl_new); 165651078Speter } 165751078Speter 165851078Speter /* finished? */ 165951078Speter#ifndef COM_MULTIPORT 166051078Speter if ((inb(com->int_id_port) & IIR_IMASK) == IIR_NOPEND) 166151078Speter#endif /* COM_MULTIPORT */ 166251078Speter return; 166351078Speter } 166451078Speter} 166551078Speter 166665557Sjasone/* software interrupt handler for SWI_TTY */ 166751078Speterstatic void 166867551Sjhbsiopoll(void *dummy) 166951078Speter{ 167051078Speter int unit; 167151078Speter 167251078Speter if (com_events == 0) 167351078Speter return; 167451078Speterrepeat: 167553344Speter for (unit = 0; unit < sio_numunits; ++unit) { 167651078Speter struct com_s *com; 167751078Speter int incc; 167851078Speter struct tty *tp; 167951078Speter 168051078Speter com = com_addr(unit); 168151078Speter if (com == NULL) 168251078Speter continue; 168351078Speter tp = com->tp; 168451078Speter if (tp == NULL || com->gone) { 168551078Speter /* 168651078Speter * Discard any events related to never-opened or 168751078Speter * going-away devices. 168851078Speter */ 168972200Sbmilekic mtx_lock_spin(&sio_lock); 169051078Speter incc = com->iptr - com->ibuf; 169151078Speter com->iptr = com->ibuf; 169251078Speter if (com->state & CS_CHECKMSR) { 169351078Speter incc += LOTS_OF_EVENTS; 169451078Speter com->state &= ~CS_CHECKMSR; 169551078Speter } 169651078Speter com_events -= incc; 169772200Sbmilekic mtx_unlock_spin(&sio_lock); 169851078Speter continue; 169951078Speter } 170051078Speter if (com->iptr != com->ibuf) { 170172200Sbmilekic mtx_lock_spin(&sio_lock); 170251078Speter sioinput(com); 170372200Sbmilekic mtx_unlock_spin(&sio_lock); 170451078Speter } 170551078Speter if (com->state & CS_CHECKMSR) { 170651078Speter u_char delta_modem_status; 170751078Speter 170872200Sbmilekic mtx_lock_spin(&sio_lock); 170951078Speter delta_modem_status = com->last_modem_status 171051078Speter ^ com->prev_modem_status; 171151078Speter com->prev_modem_status = com->last_modem_status; 171251078Speter com_events -= LOTS_OF_EVENTS; 171351078Speter com->state &= ~CS_CHECKMSR; 171472200Sbmilekic mtx_unlock_spin(&sio_lock); 171551078Speter if (delta_modem_status & MSR_DCD) 1716130095Sphk ttyld_modem(tp, 1717130095Sphk com->prev_modem_status & MSR_DCD); 171851078Speter } 171951078Speter if (com->state & CS_ODONE) { 172072200Sbmilekic mtx_lock_spin(&sio_lock); 172151078Speter com_events -= LOTS_OF_EVENTS; 172251078Speter com->state &= ~CS_ODONE; 172372200Sbmilekic mtx_unlock_spin(&sio_lock); 172451078Speter if (!(com->state & CS_BUSY) 172551078Speter && !(com->extra_state & CSE_BUSYCHECK)) { 172651078Speter timeout(siobusycheck, com, hz / 100); 172751078Speter com->extra_state |= CSE_BUSYCHECK; 172851078Speter } 1729130077Sphk ttyld_start(tp); 173051078Speter } 173151078Speter if (com_events == 0) 173251078Speter break; 173351078Speter } 173451078Speter if (com_events >= LOTS_OF_EVENTS) 173551078Speter goto repeat; 173651078Speter} 173751078Speter 1738131373Sphkstatic void 1739131094Sphkcombreak(tp, sig) 1740131094Sphk struct tty *tp; 1741131094Sphk int sig; 1742131094Sphk{ 1743131094Sphk struct com_s *com; 1744131094Sphk 1745135329Sphk com = tp->t_sc; 1746131094Sphk 1747131094Sphk if (sig) 1748131094Sphk sio_setreg(com, com_cfcr, com->cfcr_image |= CFCR_SBREAK); 1749131094Sphk else 1750131094Sphk sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); 1751131094Sphk} 1752131094Sphk 1753131094Sphkstatic int 175451078Spetercomparam(tp, t) 175551078Speter struct tty *tp; 175651078Speter struct termios *t; 175751078Speter{ 175851078Speter u_int cfcr; 175951078Speter int cflag; 176051078Speter struct com_s *com; 176189986Sjhay u_int divisor; 176251078Speter u_char dlbh; 176351078Speter u_char dlbl; 1764120159Sbde u_char efr_flowbits; 176551078Speter int s; 176651078Speter 1767135329Sphk com = tp->t_sc; 176889986Sjhay if (com == NULL) 176989986Sjhay return (ENODEV); 177089986Sjhay 177151078Speter /* check requested parameters */ 1772120505Sbde if (t->c_ispeed != (t->c_ospeed != 0 ? t->c_ospeed : tp->t_ospeed)) 1773120505Sbde return (EINVAL); 1774120505Sbde divisor = siodivisor(com->rclk, t->c_ispeed); 1775120505Sbde if (divisor == 0) 1776120505Sbde return (EINVAL); 177751078Speter 177851078Speter /* parameters are OK, convert them to the com struct and the device */ 177951078Speter s = spltty(); 1780120505Sbde if (t->c_ospeed == 0) 1781131094Sphk (void)commodem(tp, 0, SER_DTR); /* hang up line */ 178251078Speter else 1783131094Sphk (void)commodem(tp, SER_DTR, 0); 178451078Speter cflag = t->c_cflag; 178551078Speter switch (cflag & CSIZE) { 178651078Speter case CS5: 178751078Speter cfcr = CFCR_5BITS; 178851078Speter break; 178951078Speter case CS6: 179051078Speter cfcr = CFCR_6BITS; 179151078Speter break; 179251078Speter case CS7: 179351078Speter cfcr = CFCR_7BITS; 179451078Speter break; 179551078Speter default: 179651078Speter cfcr = CFCR_8BITS; 179751078Speter break; 179851078Speter } 179951078Speter if (cflag & PARENB) { 180051078Speter cfcr |= CFCR_PENAB; 180151078Speter if (!(cflag & PARODD)) 180251078Speter cfcr |= CFCR_PEVEN; 180351078Speter } 180451078Speter if (cflag & CSTOPB) 180551078Speter cfcr |= CFCR_STOPB; 180651078Speter 1807120505Sbde if (com->hasfifo) { 180851078Speter /* 180951078Speter * Use a fifo trigger level low enough so that the input 181051078Speter * latency from the fifo is less than about 16 msec and 181151078Speter * the total latency is less than about 30 msec. These 181251078Speter * latencies are reasonable for humans. Serial comms 181351078Speter * protocols shouldn't expect anything better since modem 181451078Speter * latencies are larger. 181588433Sdillon * 181688433Sdillon * The fifo trigger level cannot be set at RX_HIGH for high 181788433Sdillon * speed connections without further work on reducing 181888433Sdillon * interrupt disablement times in other parts of the system, 181988433Sdillon * without producing silo overflow errors. 182051078Speter */ 182193466Sbde com->fifo_image = com->unit == siotsunit ? 0 1822120505Sbde : t->c_ispeed <= 4800 182388451Stanimura ? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_MEDH; 182451078Speter#ifdef COM_ESP 182551078Speter /* 182651078Speter * The Hayes ESP card needs the fifo DMA mode bit set 182751078Speter * in compatibility mode. If not, it will interrupt 182851078Speter * for each character received. 182951078Speter */ 183051078Speter if (com->esp) 183151078Speter com->fifo_image |= FIFO_DMA_MODE; 183251078Speter#endif 183360471Snyan sio_setreg(com, com_fifo, com->fifo_image); 183451078Speter } 183551078Speter 183665605Sjhb /* 183765605Sjhb * This returns with interrupts disabled so that we can complete 183865605Sjhb * the speed change atomically. Keeping interrupts disabled is 183965605Sjhb * especially important while com_data is hidden. 184065605Sjhb */ 184165605Sjhb (void) siosetwater(com, t->c_ispeed); 184265557Sjasone 1843120505Sbde sio_setreg(com, com_cfcr, cfcr | CFCR_DLAB); 1844120505Sbde /* 1845120505Sbde * Only set the divisor registers if they would change, since on 1846120505Sbde * some 16550 incompatibles (UMC8669F), setting them while input 1847120505Sbde * is arriving loses sync until data stops arriving. 1848120505Sbde */ 1849120505Sbde dlbl = divisor & 0xFF; 1850120505Sbde if (sio_getreg(com, com_dlbl) != dlbl) 1851120505Sbde sio_setreg(com, com_dlbl, dlbl); 1852120505Sbde dlbh = divisor >> 8; 1853120505Sbde if (sio_getreg(com, com_dlbh) != dlbh) 1854120505Sbde sio_setreg(com, com_dlbh, dlbh); 185551078Speter 1856120159Sbde efr_flowbits = 0; 185751078Speter 185851078Speter if (cflag & CRTS_IFLOW) { 185951078Speter com->state |= CS_RTS_IFLOW; 1860120159Sbde efr_flowbits |= EFR_AUTORTS; 186151078Speter /* 186251078Speter * If CS_RTS_IFLOW just changed from off to on, the change 186351078Speter * needs to be propagated to MCR_RTS. This isn't urgent, 186451078Speter * so do it later by calling comstart() instead of repeating 186551078Speter * a lot of code from comstart() here. 186651078Speter */ 186751078Speter } else if (com->state & CS_RTS_IFLOW) { 186851078Speter com->state &= ~CS_RTS_IFLOW; 186951078Speter /* 187051078Speter * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS 187151078Speter * on here, since comstart() won't do it later. 187251078Speter */ 187351078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 187451078Speter } 187551078Speter 187651078Speter /* 187751078Speter * Set up state to handle output flow control. 187851078Speter * XXX - worth handling MDMBUF (DCD) flow control at the lowest level? 187951078Speter * Now has 10+ msec latency, while CTS flow has 50- usec latency. 188051078Speter */ 188151078Speter com->state |= CS_ODEVREADY; 188251078Speter com->state &= ~CS_CTS_OFLOW; 188351078Speter if (cflag & CCTS_OFLOW) { 188451078Speter com->state |= CS_CTS_OFLOW; 1885120159Sbde efr_flowbits |= EFR_AUTOCTS; 188651078Speter if (!(com->last_modem_status & MSR_CTS)) 188751078Speter com->state &= ~CS_ODEVREADY; 188851078Speter } 188951078Speter 1890120159Sbde if (com->st16650a) { 1891120159Sbde sio_setreg(com, com_lcr, LCR_EFR_ENABLE); 1892120159Sbde sio_setreg(com, com_efr, 1893120159Sbde (sio_getreg(com, com_efr) 1894120159Sbde & ~(EFR_AUTOCTS | EFR_AUTORTS)) | efr_flowbits); 1895120159Sbde } 1896120159Sbde sio_setreg(com, com_cfcr, com->cfcr_image = cfcr); 189751078Speter 189851078Speter /* XXX shouldn't call functions while intrs are disabled. */ 1899131134Sphk ttyldoptim(tp); 190051078Speter 190172200Sbmilekic mtx_unlock_spin(&sio_lock); 190251078Speter splx(s); 190351078Speter comstart(tp); 190451078Speter if (com->ibufold != NULL) { 190551078Speter free(com->ibufold, M_DEVBUF); 190651078Speter com->ibufold = NULL; 190751078Speter } 190851078Speter return (0); 190951078Speter} 191051078Speter 191165605Sjhb/* 191270174Sjhb * This function must be called with the sio_lock mutex released and will 191370174Sjhb * return with it obtained. 191465605Sjhb */ 191551078Speterstatic int 191665605Sjhbsiosetwater(com, speed) 191751078Speter struct com_s *com; 191851078Speter speed_t speed; 191951078Speter{ 192051078Speter int cp4ticks; 192151078Speter u_char *ibuf; 192251078Speter int ibufsize; 192351078Speter struct tty *tp; 192451078Speter 192551078Speter /* 192651078Speter * Make the buffer size large enough to handle a softtty interrupt 192751078Speter * latency of about 2 ticks without loss of throughput or data 192851078Speter * (about 3 ticks if input flow control is not used or not honoured, 192951078Speter * but a bit less for CS5-CS7 modes). 193051078Speter */ 193151078Speter cp4ticks = speed / 10 / hz * 4; 193251078Speter for (ibufsize = 128; ibufsize < cp4ticks;) 193351078Speter ibufsize <<= 1; 193465605Sjhb if (ibufsize == com->ibufsize) { 193572200Sbmilekic mtx_lock_spin(&sio_lock); 193651078Speter return (0); 193765605Sjhb } 193851078Speter 193951078Speter /* 194051078Speter * Allocate input buffer. The extra factor of 2 in the size is 194151078Speter * to allow for an error byte for each input byte. 194251078Speter */ 194351078Speter ibuf = malloc(2 * ibufsize, M_DEVBUF, M_NOWAIT); 194465605Sjhb if (ibuf == NULL) { 194572200Sbmilekic mtx_lock_spin(&sio_lock); 194651078Speter return (ENOMEM); 194765605Sjhb } 194851078Speter 194951078Speter /* Initialize non-critical variables. */ 195051078Speter com->ibufold = com->ibuf; 195151078Speter com->ibufsize = ibufsize; 195251078Speter tp = com->tp; 195351078Speter if (tp != NULL) { 195451078Speter tp->t_ififosize = 2 * ibufsize; 195551078Speter tp->t_ispeedwat = (speed_t)-1; 195651078Speter tp->t_ospeedwat = (speed_t)-1; 195751078Speter } 195851078Speter 195951078Speter /* 196051078Speter * Read current input buffer, if any. Continue with interrupts 196151078Speter * disabled. 196251078Speter */ 196372200Sbmilekic mtx_lock_spin(&sio_lock); 196451078Speter if (com->iptr != com->ibuf) 196551078Speter sioinput(com); 196651078Speter 196751078Speter /*- 196851078Speter * Initialize critical variables, including input buffer watermarks. 196951078Speter * The external device is asked to stop sending when the buffer 197051078Speter * exactly reaches high water, or when the high level requests it. 197151078Speter * The high level is notified immediately (rather than at a later 197251078Speter * clock tick) when this watermark is reached. 197351078Speter * The buffer size is chosen so the watermark should almost never 197451078Speter * be reached. 197551078Speter * The low watermark is invisibly 0 since the buffer is always 197651078Speter * emptied all at once. 197751078Speter */ 197851078Speter com->iptr = com->ibuf = ibuf; 197951078Speter com->ibufend = ibuf + ibufsize; 198051078Speter com->ierroff = ibufsize; 198151078Speter com->ihighwater = ibuf + 3 * ibufsize / 4; 198251078Speter return (0); 198351078Speter} 198451078Speter 198551078Speterstatic void 198651078Spetercomstart(tp) 198751078Speter struct tty *tp; 198851078Speter{ 198951078Speter struct com_s *com; 199051078Speter int s; 199151078Speter 1992135329Sphk com = tp->t_sc; 199357915Simp if (com == NULL) 199457915Simp return; 199551078Speter s = spltty(); 199672200Sbmilekic mtx_lock_spin(&sio_lock); 199751078Speter if (tp->t_state & TS_TTSTOP) 199851078Speter com->state &= ~CS_TTGO; 199951078Speter else 200051078Speter com->state |= CS_TTGO; 200151078Speter if (tp->t_state & TS_TBLOCK) { 200251078Speter if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW) 200351078Speter outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); 200451078Speter } else { 200551078Speter if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater 200651078Speter && com->state & CS_RTS_IFLOW) 200751078Speter outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); 200851078Speter } 200972200Sbmilekic mtx_unlock_spin(&sio_lock); 201051078Speter if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { 201151078Speter ttwwakeup(tp); 201251078Speter splx(s); 201351078Speter return; 201451078Speter } 201551078Speter if (tp->t_outq.c_cc != 0) { 201651078Speter struct lbq *qp; 201751078Speter struct lbq *next; 201851078Speter 201951078Speter if (!com->obufs[0].l_queued) { 202051078Speter com->obufs[0].l_tail 202151078Speter = com->obuf1 + q_to_b(&tp->t_outq, com->obuf1, 202251078Speter sizeof com->obuf1); 202351078Speter com->obufs[0].l_next = NULL; 202451078Speter com->obufs[0].l_queued = TRUE; 202572200Sbmilekic mtx_lock_spin(&sio_lock); 202651078Speter if (com->state & CS_BUSY) { 202751078Speter qp = com->obufq.l_next; 202851078Speter while ((next = qp->l_next) != NULL) 202951078Speter qp = next; 203051078Speter qp->l_next = &com->obufs[0]; 203151078Speter } else { 203251078Speter com->obufq.l_head = com->obufs[0].l_head; 203351078Speter com->obufq.l_tail = com->obufs[0].l_tail; 203451078Speter com->obufq.l_next = &com->obufs[0]; 203551078Speter com->state |= CS_BUSY; 203651078Speter } 203772200Sbmilekic mtx_unlock_spin(&sio_lock); 203851078Speter } 203951078Speter if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) { 204051078Speter com->obufs[1].l_tail 204151078Speter = com->obuf2 + q_to_b(&tp->t_outq, com->obuf2, 204251078Speter sizeof com->obuf2); 204351078Speter com->obufs[1].l_next = NULL; 204451078Speter com->obufs[1].l_queued = TRUE; 204572200Sbmilekic mtx_lock_spin(&sio_lock); 204651078Speter if (com->state & CS_BUSY) { 204751078Speter qp = com->obufq.l_next; 204851078Speter while ((next = qp->l_next) != NULL) 204951078Speter qp = next; 205051078Speter qp->l_next = &com->obufs[1]; 205151078Speter } else { 205251078Speter com->obufq.l_head = com->obufs[1].l_head; 205351078Speter com->obufq.l_tail = com->obufs[1].l_tail; 205451078Speter com->obufq.l_next = &com->obufs[1]; 205551078Speter com->state |= CS_BUSY; 205651078Speter } 205772200Sbmilekic mtx_unlock_spin(&sio_lock); 205851078Speter } 205951078Speter tp->t_state |= TS_BUSY; 206051078Speter } 206172200Sbmilekic mtx_lock_spin(&sio_lock); 206251078Speter if (com->state >= (CS_BUSY | CS_TTGO)) 206351078Speter siointr1(com); /* fake interrupt to start output */ 206472200Sbmilekic mtx_unlock_spin(&sio_lock); 206551078Speter ttwwakeup(tp); 206651078Speter splx(s); 206751078Speter} 206851078Speter 206951078Speterstatic void 207051654Sphkcomstop(tp, rw) 207151078Speter struct tty *tp; 207251078Speter int rw; 207351078Speter{ 207451078Speter struct com_s *com; 207551078Speter 2076135329Sphk com = tp->t_sc; 207757915Simp if (com == NULL || com->gone) 207851078Speter return; 207972200Sbmilekic mtx_lock_spin(&sio_lock); 208051078Speter if (rw & FWRITE) { 208151078Speter if (com->hasfifo) 208251078Speter#ifdef COM_ESP 208351078Speter /* XXX avoid h/w bug. */ 208451078Speter if (!com->esp) 208551078Speter#endif 208660471Snyan sio_setreg(com, com_fifo, 208760471Snyan FIFO_XMT_RST | com->fifo_image); 208851078Speter com->obufs[0].l_queued = FALSE; 208951078Speter com->obufs[1].l_queued = FALSE; 209051078Speter if (com->state & CS_ODONE) 209151078Speter com_events -= LOTS_OF_EVENTS; 209251078Speter com->state &= ~(CS_ODONE | CS_BUSY); 209351078Speter com->tp->t_state &= ~TS_BUSY; 209451078Speter } 209551078Speter if (rw & FREAD) { 209651078Speter if (com->hasfifo) 209751078Speter#ifdef COM_ESP 209851078Speter /* XXX avoid h/w bug. */ 209951078Speter if (!com->esp) 210051078Speter#endif 210160471Snyan sio_setreg(com, com_fifo, 210260471Snyan FIFO_RCV_RST | com->fifo_image); 210351078Speter com_events -= (com->iptr - com->ibuf); 210451078Speter com->iptr = com->ibuf; 210551078Speter } 210672200Sbmilekic mtx_unlock_spin(&sio_lock); 210751078Speter comstart(tp); 210851078Speter} 210951078Speter 211051078Speterstatic int 2111136478Sphkcommodem(struct tty *tp, int sigon, int sigoff) 2112131094Sphk{ 211351078Speter struct com_s *com; 2114131094Sphk int bitand, bitor, msr; 211551078Speter 2116135329Sphk com = tp->t_sc; 2117131094Sphk if (com->gone) 2118131094Sphk return(0); 2119131094Sphk if (sigon != 0 || sigoff != 0) { 2120131094Sphk bitand = bitor = 0; 2121131094Sphk if (sigoff & SER_DTR) 2122131094Sphk bitand |= MCR_DTR; 2123131094Sphk if (sigoff & SER_RTS) 2124131094Sphk bitand |= MCR_RTS; 2125131094Sphk if (sigon & SER_DTR) 2126131094Sphk bitor |= MCR_DTR; 2127131094Sphk if (sigon & SER_RTS) 2128131094Sphk bitor |= MCR_RTS; 2129131094Sphk bitand = ~bitand; 2130131094Sphk mtx_lock_spin(&sio_lock); 2131131094Sphk com->mcr_image &= bitand; 2132131094Sphk com->mcr_image |= bitor; 2133131094Sphk outb(com->modem_ctl_port, com->mcr_image); 2134131094Sphk mtx_unlock_spin(&sio_lock); 2135131094Sphk return (0); 2136131094Sphk } else { 2137131094Sphk bitor = 0; 2138131094Sphk if (com->mcr_image & MCR_DTR) 2139131094Sphk bitor |= SER_DTR; 2140131094Sphk if (com->mcr_image & MCR_RTS) 2141131094Sphk bitor |= SER_RTS; 214251078Speter msr = com->prev_modem_status; 214351078Speter if (msr & MSR_CTS) 2144131094Sphk bitor |= SER_CTS; 214551078Speter if (msr & MSR_DCD) 2146131094Sphk bitor |= SER_DCD; 214751078Speter if (msr & MSR_DSR) 2148131094Sphk bitor |= SER_DSR; 2149131094Sphk if (msr & MSR_DSR) 2150131094Sphk bitor |= SER_DSR; 215151078Speter if (msr & (MSR_RI | MSR_TERI)) 2152131094Sphk bitor |= SER_RI; 2153131094Sphk return (bitor); 215451078Speter } 215551078Speter} 215651078Speter 215751078Speterstatic void 215851078Spetersiosettimeout() 215951078Speter{ 216051078Speter struct com_s *com; 216151078Speter bool_t someopen; 216251078Speter int unit; 216351078Speter 216451078Speter /* 216551078Speter * Set our timeout period to 1 second if no polled devices are open. 216651078Speter * Otherwise set it to max(1/200, 1/hz). 216751078Speter * Enable timeouts iff some device is open. 216851078Speter */ 216951078Speter untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 217051078Speter sio_timeout = hz; 217151078Speter someopen = FALSE; 217253344Speter for (unit = 0; unit < sio_numunits; ++unit) { 217351078Speter com = com_addr(unit); 217451078Speter if (com != NULL && com->tp != NULL 217551078Speter && com->tp->t_state & TS_ISOPEN && !com->gone) { 217651078Speter someopen = TRUE; 217751078Speter if (com->poll || com->poll_output) { 217851078Speter sio_timeout = hz > 200 ? hz / 200 : 1; 217951078Speter break; 218051078Speter } 218151078Speter } 218251078Speter } 218351078Speter if (someopen) { 218451078Speter sio_timeouts_until_log = hz / sio_timeout; 218551078Speter sio_timeout_handle = timeout(comwakeup, (void *)NULL, 218651078Speter sio_timeout); 218751078Speter } else { 218851078Speter /* Flush error messages, if any. */ 218951078Speter sio_timeouts_until_log = 1; 219051078Speter comwakeup((void *)NULL); 219151078Speter untimeout(comwakeup, (void *)NULL, sio_timeout_handle); 219251078Speter } 219351078Speter} 219451078Speter 219551078Speterstatic void 219651078Spetercomwakeup(chan) 219751078Speter void *chan; 219851078Speter{ 219951078Speter struct com_s *com; 220051078Speter int unit; 220151078Speter 220251078Speter sio_timeout_handle = timeout(comwakeup, (void *)NULL, sio_timeout); 220351078Speter 220451078Speter /* 220551078Speter * Recover from lost output interrupts. 220651078Speter * Poll any lines that don't use interrupts. 220751078Speter */ 220853344Speter for (unit = 0; unit < sio_numunits; ++unit) { 220951078Speter com = com_addr(unit); 221051078Speter if (com != NULL && !com->gone 221151078Speter && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) { 221272200Sbmilekic mtx_lock_spin(&sio_lock); 221351078Speter siointr1(com); 221472200Sbmilekic mtx_unlock_spin(&sio_lock); 221551078Speter } 221651078Speter } 221751078Speter 221851078Speter /* 221951078Speter * Check for and log errors, but not too often. 222051078Speter */ 222151078Speter if (--sio_timeouts_until_log > 0) 222251078Speter return; 222351078Speter sio_timeouts_until_log = hz / sio_timeout; 222453344Speter for (unit = 0; unit < sio_numunits; ++unit) { 222551078Speter int errnum; 222651078Speter 222751078Speter com = com_addr(unit); 222851078Speter if (com == NULL) 222951078Speter continue; 223051078Speter if (com->gone) 223151078Speter continue; 223251078Speter for (errnum = 0; errnum < CE_NTYPES; ++errnum) { 223351078Speter u_int delta; 223451078Speter u_long total; 223551078Speter 223672200Sbmilekic mtx_lock_spin(&sio_lock); 223751078Speter delta = com->delta_error_counts[errnum]; 223851078Speter com->delta_error_counts[errnum] = 0; 223972200Sbmilekic mtx_unlock_spin(&sio_lock); 224051078Speter if (delta == 0) 224151078Speter continue; 224251078Speter total = com->error_counts[errnum] += delta; 224351078Speter log(LOG_ERR, "sio%d: %u more %s%s (total %lu)\n", 224451078Speter unit, delta, error_desc[errnum], 224551078Speter delta == 1 ? "" : "s", total); 224651078Speter } 224751078Speter } 224851078Speter} 224951078Speter 225051078Speter/* 225151078Speter * Following are all routines needed for SIO to act as console 225251078Speter */ 225351078Speterstruct siocnstate { 225451078Speter u_char dlbl; 225551078Speter u_char dlbh; 225651078Speter u_char ier; 225751078Speter u_char cfcr; 225851078Speter u_char mcr; 225951078Speter}; 226051078Speter 2261120457Sphk/* 2262120457Sphk * This is a function in order to not replicate "ttyd%d" more 2263120457Sphk * places than absolutely necessary. 2264120457Sphk */ 2265120457Sphkstatic void 2266120457Sphksiocnset(struct consdev *cd, int unit) 2267120457Sphk{ 2268120457Sphk 2269120457Sphk cd->cn_unit = unit; 2270120457Sphk sprintf(cd->cn_name, "ttyd%d", unit); 2271120457Sphk} 2272120457Sphk 227392739Salfredstatic speed_t siocngetspeed(Port_t, u_long rclk); 227493010Sbdestatic void siocnclose(struct siocnstate *sp, Port_t iobase); 227593010Sbdestatic void siocnopen(struct siocnstate *sp, Port_t iobase, int speed); 227693010Sbdestatic void siocntxwait(Port_t iobase); 227751078Speter 2278158943Sphkstatic cn_probe_t sio_cnprobe; 2279158943Sphkstatic cn_init_t sio_cninit; 2280158943Sphkstatic cn_term_t sio_cnterm; 2281158943Sphkstatic cn_getc_t sio_cngetc; 2282158943Sphkstatic cn_putc_t sio_cnputc; 228351078Speter 2284158947SphkCONSOLE_DRIVER(sio); 228551078Speter 228651078Speterstatic void 228751078Spetersiocntxwait(iobase) 228851078Speter Port_t iobase; 228951078Speter{ 229051078Speter int timo; 229151078Speter 229251078Speter /* 229351078Speter * Wait for any pending transmission to finish. Required to avoid 229451078Speter * the UART lockup bug when the speed is changed, and for normal 229551078Speter * transmits. 229651078Speter */ 229751078Speter timo = 100000; 229851078Speter while ((inb(iobase + com_lsr) & (LSR_TSRE | LSR_TXRDY)) 229951078Speter != (LSR_TSRE | LSR_TXRDY) && --timo != 0) 230051078Speter ; 230151078Speter} 230251078Speter 230351078Speter/* 230451078Speter * Read the serial port specified and try to figure out what speed 230551078Speter * it's currently running at. We're assuming the serial port has 230651078Speter * been initialized and is basicly idle. This routine is only intended 230751078Speter * to be run at system startup. 230851078Speter * 230951078Speter * If the value read from the serial port doesn't make sense, return 0. 231051078Speter */ 231151078Speter 231251078Speterstatic speed_t 231389986Sjhaysiocngetspeed(iobase, rclk) 231489986Sjhay Port_t iobase; 231589986Sjhay u_long rclk; 231651078Speter{ 231789986Sjhay u_int divisor; 231851078Speter u_char dlbh; 231951078Speter u_char dlbl; 232051078Speter u_char cfcr; 232151078Speter 232251078Speter cfcr = inb(iobase + com_cfcr); 232351078Speter outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 232451078Speter 232551078Speter dlbl = inb(iobase + com_dlbl); 232651078Speter dlbh = inb(iobase + com_dlbh); 232751078Speter 232851078Speter outb(iobase + com_cfcr, cfcr); 232951078Speter 233089986Sjhay divisor = dlbh << 8 | dlbl; 233151078Speter 233289986Sjhay /* XXX there should be more sanity checking. */ 233389986Sjhay if (divisor == 0) 233489986Sjhay return (CONSPEED); 233589986Sjhay return (rclk / (16UL * divisor)); 233651078Speter} 233751078Speter 233851078Speterstatic void 233951078Spetersiocnopen(sp, iobase, speed) 234051078Speter struct siocnstate *sp; 234151078Speter Port_t iobase; 234251078Speter int speed; 234351078Speter{ 234489986Sjhay u_int divisor; 234551078Speter u_char dlbh; 234651078Speter u_char dlbl; 234751078Speter 234851078Speter /* 234951078Speter * Save all the device control registers except the fifo register 235051078Speter * and set our default ones (cs8 -parenb speed=comdefaultrate). 235151078Speter * We can't save the fifo register since it is read-only. 235251078Speter */ 235351078Speter sp->ier = inb(iobase + com_ier); 235451078Speter outb(iobase + com_ier, 0); /* spltty() doesn't stop siointr() */ 235551078Speter siocntxwait(iobase); 235651078Speter sp->cfcr = inb(iobase + com_cfcr); 235751078Speter outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 235851078Speter sp->dlbl = inb(iobase + com_dlbl); 235951078Speter sp->dlbh = inb(iobase + com_dlbh); 236051078Speter /* 236151078Speter * Only set the divisor registers if they would change, since on 236251078Speter * some 16550 incompatibles (Startech), setting them clears the 236351078Speter * data input register. This also reduces the effects of the 236451078Speter * UMC8669F bug. 236551078Speter */ 236689986Sjhay divisor = siodivisor(comdefaultrclk, speed); 236751078Speter dlbl = divisor & 0xFF; 236851078Speter if (sp->dlbl != dlbl) 236951078Speter outb(iobase + com_dlbl, dlbl); 237089986Sjhay dlbh = divisor >> 8; 237151078Speter if (sp->dlbh != dlbh) 237251078Speter outb(iobase + com_dlbh, dlbh); 237351078Speter outb(iobase + com_cfcr, CFCR_8BITS); 237451078Speter sp->mcr = inb(iobase + com_mcr); 237551078Speter /* 237651078Speter * We don't want interrupts, but must be careful not to "disable" 237751078Speter * them by clearing the MCR_IENABLE bit, since that might cause 237851078Speter * an interrupt by floating the IRQ line. 237951078Speter */ 238051078Speter outb(iobase + com_mcr, (sp->mcr & MCR_IENABLE) | MCR_DTR | MCR_RTS); 238151078Speter} 238251078Speter 238351078Speterstatic void 238451078Spetersiocnclose(sp, iobase) 238551078Speter struct siocnstate *sp; 238651078Speter Port_t iobase; 238751078Speter{ 238851078Speter /* 238951078Speter * Restore the device control registers. 239051078Speter */ 239151078Speter siocntxwait(iobase); 239251078Speter outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); 239351078Speter if (sp->dlbl != inb(iobase + com_dlbl)) 239451078Speter outb(iobase + com_dlbl, sp->dlbl); 239551078Speter if (sp->dlbh != inb(iobase + com_dlbh)) 239651078Speter outb(iobase + com_dlbh, sp->dlbh); 239751078Speter outb(iobase + com_cfcr, sp->cfcr); 239851078Speter /* 239951078Speter * XXX damp oscillations of MCR_DTR and MCR_RTS by not restoring them. 240051078Speter */ 240151078Speter outb(iobase + com_mcr, sp->mcr | MCR_DTR | MCR_RTS); 240251078Speter outb(iobase + com_ier, sp->ier); 240351078Speter} 240451078Speter 240551078Speterstatic void 2406158943Sphksio_cnprobe(cp) 240751078Speter struct consdev *cp; 240851078Speter{ 240951078Speter speed_t boot_speed; 241051078Speter u_char cfcr; 241189986Sjhay u_int divisor; 2412128899Sambrisko int s, unit; 241351078Speter struct siocnstate sp; 241451078Speter 241551078Speter /* 241651078Speter * Find our first enabled console, if any. If it is a high-level 241751078Speter * console device, then initialize it and return successfully. 241851078Speter * If it is a low-level console device, then initialize it and 241951078Speter * return unsuccessfully. It must be initialized in both cases 242051078Speter * for early use by console drivers and debuggers. Initializing 242151078Speter * the hardware is not necessary in all cases, since the i/o 242251078Speter * routines initialize it on the fly, but it is necessary if 242351078Speter * input might arrive while the hardware is switched back to an 242451078Speter * uninitialized state. We can't handle multiple console devices 242551078Speter * yet because our low-level routines don't take a device arg. 242651078Speter * We trust the user to set the console flags properly so that we 242751078Speter * don't need to probe. 242851078Speter */ 242951078Speter cp->cn_pri = CN_DEAD; 243051078Speter 2431128899Sambrisko for (unit = 0; unit < 16; unit++) { /* XXX need to know how many */ 2432128899Sambrisko int flags; 2433117167Sjhb 2434128899Sambrisko if (resource_disabled("sio", unit)) 2435128899Sambrisko continue; 2436128899Sambrisko if (resource_int_value("sio", unit, "flags", &flags)) 2437128899Sambrisko continue; 2438128899Sambrisko if (COM_CONSOLE(flags) || COM_DEBUGGER(flags)) { 2439128899Sambrisko int port; 2440128899Sambrisko Port_t iobase; 2441128899Sambrisko 2442128899Sambrisko if (resource_int_value("sio", unit, "port", &port)) 2443128781Sambrisko continue; 2444128899Sambrisko iobase = port; 2445128899Sambrisko s = spltty(); 2446128899Sambrisko if (boothowto & RB_SERIAL) { 2447128899Sambrisko boot_speed = 2448128899Sambrisko siocngetspeed(iobase, comdefaultrclk); 2449128899Sambrisko if (boot_speed) 2450128899Sambrisko comdefaultrate = boot_speed; 245151078Speter } 245251078Speter 245351078Speter /* 245451078Speter * Initialize the divisor latch. We can't rely on 245551078Speter * siocnopen() to do this the first time, since it 245651078Speter * avoids writing to the latch if the latch appears 245751078Speter * to have the correct value. Also, if we didn't 245851078Speter * just read the speed from the hardware, then we 245951078Speter * need to set the speed in hardware so that 246051078Speter * switching it later is null. 246151078Speter */ 2462128899Sambrisko cfcr = inb(iobase + com_cfcr); 2463128899Sambrisko outb(iobase + com_cfcr, CFCR_DLAB | cfcr); 2464128899Sambrisko divisor = siodivisor(comdefaultrclk, comdefaultrate); 2465128899Sambrisko outb(iobase + com_dlbl, divisor & 0xff); 2466128899Sambrisko outb(iobase + com_dlbh, divisor >> 8); 2467128899Sambrisko outb(iobase + com_cfcr, cfcr); 246851078Speter 2469128899Sambrisko siocnopen(&sp, iobase, comdefaultrate); 247051078Speter 2471128899Sambrisko splx(s); 2472128899Sambrisko if (COM_CONSOLE(flags) && !COM_LLCONSOLE(flags)) { 2473128899Sambrisko siocnset(cp, unit); 2474128899Sambrisko cp->cn_pri = COM_FORCECONSOLE(flags) 2475128899Sambrisko || boothowto & RB_SERIAL 2476128899Sambrisko ? CN_REMOTE : CN_NORMAL; 2477128899Sambrisko siocniobase = iobase; 2478128899Sambrisko siocnunit = unit; 2479128899Sambrisko } 2480131939Smarcel#ifdef GDB 2481131939Smarcel if (COM_DEBUGGER(flags)) 2482128899Sambrisko siogdbiobase = iobase; 248351078Speter#endif 248451078Speter } 248551078Speter } 248651078Speter} 248751078Speter 248866230Sjhbstatic void 2489158943Sphksio_cninit(cp) 249066230Sjhb struct consdev *cp; 249166230Sjhb{ 2492120457Sphk comconsole = cp->cn_unit; 249366230Sjhb} 249466230Sjhb 249585371Sjlemonstatic void 2496158943Sphksio_cnterm(cp) 249785371Sjlemon struct consdev *cp; 249885371Sjlemon{ 249985371Sjlemon comconsole = -1; 250085371Sjlemon} 250185371Sjlemon 250251078Speterstatic int 2503158947Sphksio_cngetc(struct consdev *cd) 250451078Speter{ 250551078Speter int c; 250651078Speter Port_t iobase; 250751078Speter int s; 250851078Speter struct siocnstate sp; 250998401Sn_hibma speed_t speed; 2510131939Smarcel 2511131939Smarcel if (cd != NULL && cd->cn_unit == siocnunit) { 251298401Sn_hibma iobase = siocniobase; 251398401Sn_hibma speed = comdefaultrate; 251498401Sn_hibma } else { 2515131939Smarcel#ifdef GDB 251651078Speter iobase = siogdbiobase; 251798401Sn_hibma speed = gdbdefaultrate; 2518131939Smarcel#else 2519131939Smarcel return (-1); 2520131939Smarcel#endif 252198401Sn_hibma } 252251078Speter s = spltty(); 252398401Sn_hibma siocnopen(&sp, iobase, speed); 252451078Speter if (inb(iobase + com_lsr) & LSR_RXRDY) 252551078Speter c = inb(iobase + com_data); 252651078Speter else 252751078Speter c = -1; 252851078Speter siocnclose(&sp, iobase); 252951078Speter splx(s); 253051078Speter return (c); 253151078Speter} 253251078Speter 2533104094Sphkstatic void 2534158943Sphksio_cnputc(struct consdev *cd, int c) 253551078Speter{ 253688582Sbde int need_unlock; 253751078Speter int s; 253851078Speter struct siocnstate sp; 253951078Speter Port_t iobase; 254098401Sn_hibma speed_t speed; 254151078Speter 2542131939Smarcel if (cd != NULL && cd->cn_unit == siocnunit) { 254398401Sn_hibma iobase = siocniobase; 254498401Sn_hibma speed = comdefaultrate; 254598401Sn_hibma } else { 2546131939Smarcel#ifdef GDB 254751078Speter iobase = siogdbiobase; 254898401Sn_hibma speed = gdbdefaultrate; 2549131939Smarcel#else 2550131939Smarcel return; 2551131939Smarcel#endif 255298401Sn_hibma } 255351078Speter s = spltty(); 255488582Sbde need_unlock = 0; 2555141530Srwatson if (!kdb_active && sio_inited == 2 && !mtx_owned(&sio_lock)) { 2556141530Srwatson mtx_lock_spin(&sio_lock); 2557141530Srwatson need_unlock = 1; 255888582Sbde } 255998401Sn_hibma siocnopen(&sp, iobase, speed); 256051078Speter siocntxwait(iobase); 256151078Speter outb(iobase + com_data, c); 256251078Speter siocnclose(&sp, iobase); 2563141530Srwatson if (need_unlock) 2564141530Srwatson mtx_unlock_spin(&sio_lock); 256551078Speter splx(s); 256651078Speter} 256751078Speter 2568131939Smarcel/* 2569131939Smarcel * Remote gdb(1) support. 2570131939Smarcel */ 2571131939Smarcel 2572131939Smarcel#if defined(GDB) 2573131939Smarcel 2574131939Smarcel#include <gdb/gdb.h> 2575131939Smarcel 2576131939Smarcelstatic gdb_probe_f siogdbprobe; 2577131939Smarcelstatic gdb_init_f siogdbinit; 2578131939Smarcelstatic gdb_term_f siogdbterm; 2579131939Smarcelstatic gdb_getc_f siogdbgetc; 2580131939Smarcelstatic gdb_putc_f siogdbputc; 2581131939Smarcel 2582158950SphkGDB_DBGPORT(sio, siogdbprobe, siogdbinit, siogdbterm, siogdbgetc, siogdbputc); 2583131939Smarcel 2584131939Smarcelstatic int 2585131939Smarcelsiogdbprobe(void) 258651078Speter{ 2587131939Smarcel return ((siogdbiobase != 0) ? 0 : -1); 2588131939Smarcel} 258951078Speter 2590131939Smarcelstatic void 2591131939Smarcelsiogdbinit(void) 2592131939Smarcel{ 2593131939Smarcel} 259498401Sn_hibma 2595131939Smarcelstatic void 2596131939Smarcelsiogdbterm(void) 2597131939Smarcel{ 259851078Speter} 259951078Speter 2600131939Smarcelstatic void 2601131939Smarcelsiogdbputc(int c) 260251078Speter{ 2603158943Sphk sio_cnputc(NULL, c); 2604131939Smarcel} 260551078Speter 2606131939Smarcelstatic int 2607158947Sphksiogdbgetc(void) 2608131939Smarcel{ 2609158950Sphk return (sio_cngetc(NULL)); 261051078Speter} 2611131939Smarcel 261251078Speter#endif 2613