diff options
Diffstat (limited to 'sys/isa/sio.c')
| -rw-r--r-- | sys/isa/sio.c | 3398 |
1 files changed, 0 insertions, 3398 deletions
diff --git a/sys/isa/sio.c b/sys/isa/sio.c deleted file mode 100644 index 9f86bc8..0000000 --- a/sys/isa/sio.c +++ /dev/null @@ -1,3398 +0,0 @@ -/*- - * Copyright (c) 1991 The Regents of the University of California. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * $FreeBSD$ - * from: @(#)com.c 7.5 (Berkeley) 5/16/91 - * from: i386/isa sio.c,v 1.234 - */ - -#include "opt_comconsole.h" -#include "opt_compat.h" -#include "opt_ddb.h" -#include "opt_sio.h" -#include "card.h" -#include "pci.h" - -/* - * Serial driver, based on 386BSD-0.1 com driver. - * Mostly rewritten to use pseudo-DMA. - * Works for National Semiconductor NS8250-NS16550AF UARTs. - * COM driver, based on HP dca driver. - * - * Changes for PC-Card integration: - * - Added PC-Card driver table and handlers - */ -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/bus.h> -#include <sys/bus.h> -#include <sys/conf.h> -#include <sys/dkstat.h> -#include <sys/fcntl.h> -#include <sys/interrupt.h> -#include <sys/kernel.h> -#include <sys/lock.h> -#include <sys/malloc.h> -#include <sys/module.h> -#include <sys/mutex.h> -#include <sys/proc.h> -#include <sys/reboot.h> -#include <sys/sysctl.h> -#include <sys/syslog.h> -#include <sys/tty.h> -#include <machine/bus_pio.h> -#include <machine/bus.h> -#include <sys/rman.h> -#include <sys/timetc.h> -#include <sys/timepps.h> - -#include <isa/isareg.h> -#include <isa/isavar.h> -#if NPCI > 0 -#include <pci/pcireg.h> -#include <pci/pcivar.h> -#endif - -#include <machine/clock.h> -#include <machine/resource.h> - -#include <isa/sioreg.h> - -#ifdef COM_ESP -#include <dev/ic/esp.h> -#endif -#include <dev/ic/ns16550.h> - -#define LOTS_OF_EVENTS 64 /* helps separate urgent events from input */ - -#define CALLOUT_MASK 0x80 -#define CONTROL_MASK 0x60 -#define CONTROL_INIT_STATE 0x20 -#define CONTROL_LOCK_STATE 0x40 -#define DEV_TO_UNIT(dev) (MINOR_TO_UNIT(minor(dev))) -#define MINOR_MAGIC_MASK (CALLOUT_MASK | CONTROL_MASK) -#define MINOR_TO_UNIT(mynor) ((mynor) & ~MINOR_MAGIC_MASK) - -#ifdef COM_MULTIPORT -/* checks in flags for multiport and which is multiport "master chip" - * for a given card - */ -#define COM_ISMULTIPORT(flags) ((flags) & 0x01) -#define COM_MPMASTER(flags) (((flags) >> 8) & 0x0ff) -#define COM_NOTAST4(flags) ((flags) & 0x04) -#endif /* COM_MULTIPORT */ - -#define COM_CONSOLE(flags) ((flags) & 0x10) -#define COM_FORCECONSOLE(flags) ((flags) & 0x20) -#define COM_LLCONSOLE(flags) ((flags) & 0x40) -#define COM_DEBUGGER(flags) ((flags) & 0x80) -#define COM_LOSESOUTINTS(flags) ((flags) & 0x08) -#define COM_NOFIFO(flags) ((flags) & 0x02) -#define COM_ST16650A(flags) ((flags) & 0x20000) -#define COM_C_NOPROBE (0x40000) -#define COM_NOPROBE(flags) ((flags) & COM_C_NOPROBE) -#define COM_C_IIR_TXRDYBUG (0x80000) -#define COM_IIR_TXRDYBUG(flags) ((flags) & COM_C_IIR_TXRDYBUG) -#define COM_FIFOSIZE(flags) (((flags) & 0xff000000) >> 24) - -#define com_scr 7 /* scratch register for 16450-16550 (R/W) */ - -#define sio_getreg(com, off) \ - (bus_space_read_1((com)->bst, (com)->bsh, (off))) -#define sio_setreg(com, off, value) \ - (bus_space_write_1((com)->bst, (com)->bsh, (off), (value))) - -/* - * com state bits. - * (CS_BUSY | CS_TTGO) and (CS_BUSY | CS_TTGO | CS_ODEVREADY) must be higher - * than the other bits so that they can be tested as a group without masking - * off the low bits. - * - * The following com and tty flags correspond closely: - * CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and - * comstop()) - * CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart()) - * CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam()) - * CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam()) - * TS_FLUSH is not used. - * XXX I think TIOCSETA doesn't clear TS_TTSTOP when it clears IXON. - * XXX CS_*FLOW should be CF_*FLOW in com->flags (control flags not state). - */ -#define CS_BUSY 0x80 /* output in progress */ -#define CS_TTGO 0x40 /* output not stopped by XOFF */ -#define CS_ODEVREADY 0x20 /* external device h/w ready (CTS) */ -#define CS_CHECKMSR 1 /* check of MSR scheduled */ -#define CS_CTS_OFLOW 2 /* use CTS output flow control */ -#define CS_DTR_OFF 0x10 /* DTR held off */ -#define CS_ODONE 4 /* output completed */ -#define CS_RTS_IFLOW 8 /* use RTS input flow control */ -#define CSE_BUSYCHECK 1 /* siobusycheck() scheduled */ - -static char const * const error_desc[] = { -#define CE_OVERRUN 0 - "silo overflow", -#define CE_INTERRUPT_BUF_OVERFLOW 1 - "interrupt-level buffer overflow", -#define CE_TTY_BUF_OVERFLOW 2 - "tty-level buffer overflow", -}; - -#define CE_NTYPES 3 -#define CE_RECORD(com, errnum) (++(com)->delta_error_counts[errnum]) - -/* types. XXX - should be elsewhere */ -typedef u_int Port_t; /* hardware port */ -typedef u_char bool_t; /* boolean */ - -/* queue of linear buffers */ -struct lbq { - u_char *l_head; /* next char to process */ - u_char *l_tail; /* one past the last char to process */ - struct lbq *l_next; /* next in queue */ - bool_t l_queued; /* nonzero if queued */ -}; - -/* com device structure */ -struct com_s { - u_int flags; /* Copy isa device flags */ - u_char state; /* miscellaneous flag bits */ - bool_t active_out; /* nonzero if the callout device is open */ - u_char cfcr_image; /* copy of value written to CFCR */ -#ifdef COM_ESP - bool_t esp; /* is this unit a hayes esp board? */ -#endif - u_char extra_state; /* more flag bits, separate for order trick */ - u_char fifo_image; /* copy of value written to FIFO */ - bool_t hasfifo; /* nonzero for 16550 UARTs */ - bool_t st16650a; /* Is a Startech 16650A or RTS/CTS compat */ - bool_t loses_outints; /* nonzero if device loses output interrupts */ - u_char mcr_image; /* copy of value written to MCR */ -#ifdef COM_MULTIPORT - bool_t multiport; /* is this unit part of a multiport device? */ -#endif /* COM_MULTIPORT */ - bool_t no_irq; /* nonzero if irq is not attached */ - bool_t gone; /* hardware disappeared */ - bool_t poll; /* nonzero if polling is required */ - bool_t poll_output; /* nonzero if polling for output is required */ - int unit; /* unit number */ - int dtr_wait; /* time to hold DTR down on close (* 1/hz) */ - u_int tx_fifo_size; - u_int wopeners; /* # processes waiting for DCD in open() */ - - /* - * The high level of the driver never reads status registers directly - * because there would be too many side effects to handle conveniently. - * Instead, it reads copies of the registers stored here by the - * interrupt handler. - */ - u_char last_modem_status; /* last MSR read by intr handler */ - u_char prev_modem_status; /* last MSR handled by high level */ - - u_char hotchar; /* ldisc-specific char to be handled ASAP */ - u_char *ibuf; /* start of input buffer */ - u_char *ibufend; /* end of input buffer */ - u_char *ibufold; /* old input buffer, to be freed */ - u_char *ihighwater; /* threshold in input buffer */ - u_char *iptr; /* next free spot in input buffer */ - int ibufsize; /* size of ibuf (not include error bytes) */ - int ierroff; /* offset of error bytes in ibuf */ - - struct lbq obufq; /* head of queue of output buffers */ - struct lbq obufs[2]; /* output buffers */ - - bus_space_tag_t bst; - bus_space_handle_t bsh; - - Port_t data_port; /* i/o ports */ -#ifdef COM_ESP - Port_t esp_port; -#endif - Port_t int_id_port; - Port_t modem_ctl_port; - Port_t line_status_port; - Port_t modem_status_port; - Port_t intr_ctl_port; /* Ports of IIR register */ - - struct tty *tp; /* cross reference */ - - /* Initial state. */ - struct termios it_in; /* should be in struct tty */ - struct termios it_out; - - /* Lock state. */ - struct termios lt_in; /* should be in struct tty */ - struct termios lt_out; - - bool_t do_timestamp; - bool_t do_dcd_timestamp; - struct timeval timestamp; - struct timeval dcd_timestamp; - struct pps_state pps; - - u_long bytes_in; /* statistics */ - u_long bytes_out; - u_int delta_error_counts[CE_NTYPES]; - u_long error_counts[CE_NTYPES]; - - struct resource *irqres; - struct resource *ioportres; - void *cookie; - dev_t devs[6]; - - /* - * Data area for output buffers. Someday we should build the output - * buffer queue without copying data. - */ - u_char obuf1[256]; - u_char obuf2[256]; -}; - -#ifdef COM_ESP -static int espattach __P((struct com_s *com, Port_t esp_port)); -#endif -static int sioattach __P((device_t dev, int rid)); -static int sio_isa_attach __P((device_t dev)); - -static timeout_t siobusycheck; -static timeout_t siodtrwakeup; -static void comhardclose __P((struct com_s *com)); -static void sioinput __P((struct com_s *com)); -static void siointr1 __P((struct com_s *com)); -static void siointr __P((void *arg)); -static int commctl __P((struct com_s *com, int bits, int how)); -static int comparam __P((struct tty *tp, struct termios *t)); -static void siopoll __P((void *)); -static int sioprobe __P((device_t dev, int xrid)); -static int sio_isa_probe __P((device_t dev)); -static void siosettimeout __P((void)); -static int siosetwater __P((struct com_s *com, speed_t speed)); -static void comstart __P((struct tty *tp)); -static void comstop __P((struct tty *tp, int rw)); -static timeout_t comwakeup; -static void disc_optim __P((struct tty *tp, struct termios *t, - struct com_s *com)); - -#if NCARD > 0 -static int sio_pccard_attach __P((device_t dev)); -static int sio_pccard_detach __P((device_t dev)); -static int sio_pccard_probe __P((device_t dev)); -#endif /* NCARD > 0 */ - -#if NPCI > 0 -static int sio_pci_attach __P((device_t dev)); -static void sio_pci_kludge_unit __P((device_t dev)); -static int sio_pci_probe __P((device_t dev)); -#endif /* NPCI > 0 */ - -static char driver_name[] = "sio"; -static struct mtx sio_lock; -static int sio_inited; - -/* table and macro for fast conversion from a unit number to its com struct */ -static devclass_t sio_devclass; -#define com_addr(unit) ((struct com_s *) \ - devclass_get_softc(sio_devclass, unit)) - -static device_method_t sio_isa_methods[] = { - /* Device interface */ - DEVMETHOD(device_probe, sio_isa_probe), - DEVMETHOD(device_attach, sio_isa_attach), - - { 0, 0 } -}; - -static driver_t sio_isa_driver = { - driver_name, - sio_isa_methods, - sizeof(struct com_s), -}; - -#if NCARD > 0 -static device_method_t sio_pccard_methods[] = { - /* Device interface */ - DEVMETHOD(device_probe, sio_pccard_probe), - DEVMETHOD(device_attach, sio_pccard_attach), - DEVMETHOD(device_detach, sio_pccard_detach), - - { 0, 0 } -}; - -static driver_t sio_pccard_driver = { - driver_name, - sio_pccard_methods, - sizeof(struct com_s), -}; -#endif /* NCARD > 0 */ - -#if NPCI > 0 -static device_method_t sio_pci_methods[] = { - /* Device interface */ - DEVMETHOD(device_probe, sio_pci_probe), - DEVMETHOD(device_attach, sio_pci_attach), - - { 0, 0 } -}; - -static driver_t sio_pci_driver = { - driver_name, - sio_pci_methods, - sizeof(struct com_s), -}; -#endif /* NPCI > 0 */ - -static d_open_t sioopen; -static d_close_t sioclose; -static d_read_t sioread; -static d_write_t siowrite; -static d_ioctl_t sioioctl; - -#define CDEV_MAJOR 28 -static struct cdevsw sio_cdevsw = { - /* open */ sioopen, - /* close */ sioclose, - /* read */ sioread, - /* write */ siowrite, - /* ioctl */ sioioctl, - /* poll */ ttypoll, - /* mmap */ nommap, - /* strategy */ nostrategy, - /* name */ driver_name, - /* maj */ CDEV_MAJOR, - /* dump */ nodump, - /* psize */ nopsize, - /* flags */ D_TTY | D_KQFILTER, - /* kqfilter */ ttykqfilter, -}; - -int comconsole = -1; -static volatile speed_t comdefaultrate = CONSPEED; -#ifdef __alpha__ -static volatile speed_t gdbdefaultrate = CONSPEED; -#endif -static u_int com_events; /* input chars + weighted output completions */ -static Port_t siocniobase; -#ifndef __alpha__ -static int siocnunit; -#endif -static Port_t siogdbiobase; -static int siogdbunit = -1; -static void *sio_slow_ih; -static void *sio_fast_ih; -static int sio_timeout; -static int sio_timeouts_until_log; -static struct callout_handle sio_timeout_handle - = CALLOUT_HANDLE_INITIALIZER(&sio_timeout_handle); -static int sio_numunits; - -static struct speedtab comspeedtab[] = { - { 0, 0 }, - { 50, COMBRD(50) }, - { 75, COMBRD(75) }, - { 110, COMBRD(110) }, - { 134, COMBRD(134) }, - { 150, COMBRD(150) }, - { 200, COMBRD(200) }, - { 300, COMBRD(300) }, - { 600, COMBRD(600) }, - { 1200, COMBRD(1200) }, - { 1800, COMBRD(1800) }, - { 2400, COMBRD(2400) }, - { 4800, COMBRD(4800) }, - { 9600, COMBRD(9600) }, - { 19200, COMBRD(19200) }, - { 28800, COMBRD(28800) }, - { 38400, COMBRD(38400) }, - { 57600, COMBRD(57600) }, - { 115200, COMBRD(115200) }, - { -1, -1 } -}; - -#ifdef COM_ESP -/* XXX configure this properly. */ -static Port_t likely_com_ports[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, }; -static Port_t likely_esp_ports[] = { 0x140, 0x180, 0x280, 0 }; -#endif - -/* - * handle sysctl read/write requests for console speed - * - * In addition to setting comdefaultrate for I/O through /dev/console, - * also set the initial and lock values for the /dev/ttyXX device - * if there is one associated with the console. Finally, if the /dev/tty - * device has already been open, change the speed on the open running port - * itself. - */ - -static int -sysctl_machdep_comdefaultrate(SYSCTL_HANDLER_ARGS) -{ - int error, s; - speed_t newspeed; - struct com_s *com; - struct tty *tp; - - newspeed = comdefaultrate; - - error = sysctl_handle_opaque(oidp, &newspeed, sizeof newspeed, req); - if (error || !req->newptr) - return (error); - - comdefaultrate = newspeed; - - if (comconsole < 0) /* serial console not selected? */ - return (0); - - com = com_addr(comconsole); - if (com == NULL) - return (ENXIO); - - /* - * set the initial and lock rates for /dev/ttydXX and /dev/cuaXX - * (note, the lock rates really are boolean -- if non-zero, disallow - * speed changes) - */ - com->it_in.c_ispeed = com->it_in.c_ospeed = - com->lt_in.c_ispeed = com->lt_in.c_ospeed = - com->it_out.c_ispeed = com->it_out.c_ospeed = - com->lt_out.c_ispeed = com->lt_out.c_ospeed = comdefaultrate; - - /* - * if we're open, change the running rate too - */ - tp = com->tp; - if (tp && (tp->t_state & TS_ISOPEN)) { - tp->t_termios.c_ispeed = - tp->t_termios.c_ospeed = comdefaultrate; - s = spltty(); - error = comparam(tp, &tp->t_termios); - splx(s); - } - return error; -} - -SYSCTL_PROC(_machdep, OID_AUTO, conspeed, CTLTYPE_INT | CTLFLAG_RW, - 0, 0, sysctl_machdep_comdefaultrate, "I", ""); - -#define SET_FLAG(dev, bit) device_set_flags(dev, device_get_flags(dev) | (bit)) -#define CLR_FLAG(dev, bit) device_set_flags(dev, device_get_flags(dev) & ~(bit)) - -#if NCARD > 0 -static int -sio_pccard_probe(dev) - device_t dev; -{ - /* Do not probe IRQ - pccard doesn't turn on the interrupt line */ - /* until bus_setup_intr */ - SET_FLAG(dev, COM_C_NOPROBE); - - return (sioprobe(dev, 0)); -} - -static int -sio_pccard_attach(dev) - device_t dev; -{ - return (sioattach(dev, 0)); -} - -/* - * sio_detach - unload the driver and clear the table. - * XXX TODO: - * This is usually called when the card is ejected, but - * can be caused by a modunload of a controller driver. - * The idea is to reset the driver's view of the device - * and ensure that any driver entry points such as - * read and write do not hang. - */ -static int -sio_pccard_detach(dev) - device_t dev; -{ - struct com_s *com; - int i; - - com = (struct com_s *) device_get_softc(dev); - if (com == NULL) { - device_printf(dev, "NULL com in siounload\n"); - return (0); - } - com->gone = 1; - for (i = 0 ; i < 6; i++) - destroy_dev(com->devs[i]); - if (com->irqres) { - bus_teardown_intr(dev, com->irqres, com->cookie); - bus_release_resource(dev, SYS_RES_IRQ, 0, com->irqres); - } - if (com->ioportres) - bus_release_resource(dev, SYS_RES_IOPORT, 0, com->ioportres); - if (com->tp && (com->tp->t_state & TS_ISOPEN)) { - device_printf(dev, "still open, forcing close\n"); - (*linesw[com->tp->t_line].l_close)(com->tp, 0); - com->tp->t_gen++; - ttyclose(com->tp); - ttwakeup(com->tp); - ttwwakeup(com->tp); - } else { - if (com->ibuf != NULL) - free(com->ibuf, M_DEVBUF); - } - device_printf(dev, "unloaded\n"); - return (0); -} -#endif /* NCARD > 0 */ - -#if NPCI > 0 -struct pci_ids { - u_int32_t type; - const char *desc; - int rid; -}; - -static struct pci_ids pci_ids[] = { - { 0x100812b9, "3COM PCI FaxModem", 0x10 }, - { 0x2000131f, "CyberSerial (1-port) 16550", 0x10 }, - { 0x01101407, "Koutech IOFLEX-2S PCI Dual Port Serial", 0x10 }, - { 0x01111407, "Koutech IOFLEX-2S PCI Dual Port Serial", 0x10 }, - { 0x048011c1, "Lucent kermit based PCI Modem", 0x14 }, - { 0x95211415, "Oxford Semiconductor PCI Dual Port Serial", 0x10 }, - { 0x0000151f, "SmartLink 5634PCV SurfRider", 0x10 }, - /* { 0xXXXXXXXX, "Xircom Cardbus modem", 0x10 }, */ - { 0x00000000, NULL, 0 } -}; - -static int -sio_pci_attach(dev) - device_t dev; -{ - u_int32_t type; - struct pci_ids *id; - - type = pci_get_devid(dev); - id = pci_ids; - while (id->type && id->type != type) - id++; - if (id->desc == NULL) - return (ENXIO); - sio_pci_kludge_unit(dev); - return (sioattach(dev, id->rid)); -} - -/* - * Don't cut and paste this to other drivers. It is a horrible kludge - * which will fail to work and also be unnecessary in future versions. - */ -static void -sio_pci_kludge_unit(dev) - device_t dev; -{ - devclass_t dc; - int err; - int start; - int unit; - - unit = 0; - start = 0; - while (resource_int_value("sio", unit, "port", &start) == 0 && - start > 0) - unit++; - if (device_get_unit(dev) < unit) { - dc = device_get_devclass(dev); - while (devclass_get_device(dc, unit)) - unit++; - device_printf(dev, "moving to sio%d\n", unit); - err = device_set_unit(dev, unit); /* EVIL DO NOT COPY */ - if (err) - device_printf(dev, "error moving device %d\n", err); - } -} - -static int -sio_pci_probe(dev) - device_t dev; -{ - u_int32_t type; - struct pci_ids *id; - - type = pci_get_devid(dev); - id = pci_ids; - while (id->type && id->type != type) - id++; - if (id->desc == NULL) - return (ENXIO); - device_set_desc(dev, id->desc); - return (sioprobe(dev, id->rid)); -} -#endif /* NPCI > 0 */ - -static struct isa_pnp_id sio_ids[] = { - {0x0005d041, "Standard PC COM port"}, /* PNP0500 */ - {0x0105d041, "16550A-compatible COM port"}, /* PNP0501 */ - {0x0205d041, "Multiport serial device (non-intelligent 16550)"}, /* PNP0502 */ - {0x1005d041, "Generic IRDA-compatible device"}, /* PNP0510 */ - {0x1105d041, "Generic IRDA-compatible device"}, /* PNP0511 */ - /* Devices that do not have a compatid */ - {0x12206804, NULL}, /* ACH2012 - 5634BTS 56K Video Ready Modem */ - {0x7602a904, NULL}, /* AEI0276 - 56K v.90 Fax Modem (LKT) */ - {0x00007905, NULL}, /* AKY0000 - 56K Plug&Play Modem */ - {0x01405407, NULL}, /* AZT4001 - AZT3000 PnP SOUND DEVICE, MODEM */ - {0x56039008, NULL}, /* BDP0356 - Best Data 56x2 */ - {0x56159008, NULL}, /* BDP1556 - B.D. Smart One 56SPS,Voice Modem*/ - {0x36339008, NULL}, /* BDP3336 - Best Data Prods. 336F */ - {0x0014490a, NULL}, /* BRI1400 - Boca 33.6 PnP */ - {0x0015490a, NULL}, /* BRI1500 - Internal Fax Data */ - {0x0034490a, NULL}, /* BRI3400 - Internal ACF Modem */ - {0x0094490a, NULL}, /* BRI9400 - Boca K56Flex PnP */ - {0x00b4490a, NULL}, /* BRIB400 - Boca 56k PnP */ - {0x0030320d, NULL}, /* CIR3000 - Cirrus Logic V43 */ - {0x0100440e, NULL}, /* CRD0001 - Cardinal MVP288IV ? */ - {0x36033610, NULL}, /* DAV0336 - DAVICOM 336PNP MODEM */ - {0x0000aa1a, NULL}, /* FUJ0000 - FUJITSU Modem 33600 PNP/I2 */ - {0x1200c31e, NULL}, /* GVC0012 - VF1128HV-R9 (win modem?) */ - {0x0303c31e, NULL}, /* GVC0303 - MaxTech 33.6 PnP D/F/V */ - {0x0505c31e, NULL}, /* GVC0505 - GVC 56k Faxmodem */ - {0x0116c31e, NULL}, /* GVC1601 - Rockwell V.34 Plug & Play Modem */ - {0x0050c31e, NULL}, /* GVC5000 - some GVC modem */ - {0x3800f91e, NULL}, /* GWY0038 - Telepath with v.90 */ - {0x9062f91e, NULL}, /* GWY6290 - Telepath with x2 Technology */ - {0x8100e425, NULL}, /* IOD0081 - I-O DATA DEVICE,INC. IFML-560 */ - {0x21002534, NULL}, /* MAE0021 - Jetstream Int V.90 56k Voice Series 2*/ - {0x0000f435, NULL}, /* MOT0000 - Motorola ModemSURFR 33.6 Intern */ - {0x5015f435, NULL}, /* MOT1550 - Motorola ModemSURFR 56K Modem */ - {0xf015f435, NULL}, /* MOT15F0 - Motorola VoiceSURFR 56K Modem */ - {0x6045f435, NULL}, /* MOT4560 - Motorola ? */ - {0x61e7a338, NULL}, /* NECE761 - 33.6Modem */ - {0x08804f3f, NULL}, /* OZO8008 - Zoom (33.6k Modem) */ - {0x0f804f3f, NULL}, /* OZO800f - Zoom 2812 (56k Modem) */ - {0x39804f3f, NULL}, /* OZO8039 - Zoom 56k flex */ - {0x00914f3f, NULL}, /* OZO9100 - Zoom 2919 (K56 Faxmodem) */ - {0x3024a341, NULL}, /* PMC2430 - Pace 56 Voice Internal Modem */ - {0x1000eb49, NULL}, /* ROK0010 - Rockwell ? */ - {0x1200b23d, NULL}, /* RSS0012 - OMRON ME5614ISA */ - {0x5002734a, NULL}, /* RSS0250 - 5614Jx3(G) Internal Modem */ - {0x6202734a, NULL}, /* RSS0262 - 5614Jx3[G] V90+K56Flex Modem */ - {0xc100ad4d, NULL}, /* SMM00C1 - Leopard 56k PnP */ - {0x9012b04e, NULL}, /* SUP1290 - Supra ? */ - {0x1013b04e, NULL}, /* SUP1310 - SupraExpress 336i PnP */ - {0x8013b04e, NULL}, /* SUP1380 - SupraExpress 288i PnP Voice */ - {0x8113b04e, NULL}, /* SUP1381 - SupraExpress 336i PnP Voice */ - {0x5016b04e, NULL}, /* SUP1650 - Supra 336i Sp Intl */ - {0x7016b04e, NULL}, /* SUP1670 - Supra 336i V+ Intl */ - {0x7420b04e, NULL}, /* SUP2070 - Supra ? */ - {0x8020b04e, NULL}, /* SUP2080 - Supra ? */ - {0x8420b04e, NULL}, /* SUP2084 - SupraExpress 56i PnP */ - {0x7121b04e, NULL}, /* SUP2171 - SupraExpress 56i Sp? */ - {0x8024b04e, NULL}, /* SUP2480 - Supra ? */ - {0x01007256, NULL}, /* USR0001 - U.S. Robotics Inc., Sportster W */ - {0x02007256, NULL}, /* USR0002 - U.S. Robotics Inc. Sportster 33. */ - {0x04007256, NULL}, /* USR0004 - USR Sportster 14.4k */ - {0x06007256, NULL}, /* USR0006 - USR Sportster 33.6k */ - {0x11007256, NULL}, /* USR0011 - USR ? */ - {0x01017256, NULL}, /* USR0101 - USR ? */ - {0x30207256, NULL}, /* USR2030 - U.S.Robotics Inc. Sportster 560 */ - {0x50207256, NULL}, /* USR2050 - U.S.Robotics Inc. Sportster 33. */ - {0x70207256, NULL}, /* USR2070 - U.S.Robotics Inc. Sportster 560 */ - {0x30307256, NULL}, /* USR3030 - U.S. Robotics 56K FAX INT */ - {0x31307256, NULL}, /* USR3031 - U.S. Robotics 56K FAX INT */ - {0x50307256, NULL}, /* USR3050 - U.S. Robotics 56K FAX INT */ - {0x70307256, NULL}, /* USR3070 - U.S. Robotics 56K Voice INT */ - {0x90307256, NULL}, /* USR3090 - USR ? */ - {0x70917256, NULL}, /* USR9170 - U.S. Robotics 56K FAX INT */ - {0x90917256, NULL}, /* USR9190 - USR 56k Voice INT */ - {0x0300695c, NULL}, /* WCI0003 - Fax/Voice/Modem/Speakphone/Asvd */ - {0x01a0896a, NULL}, /* ZTIA001 - Zoom Internal V90 Faxmodem */ - {0x61f7896a, NULL}, /* ZTIF761 - Zoom ComStar 33.6 */ - {0} -}; - - - -static int -sio_isa_probe(dev) - device_t dev; -{ - /* Check isapnp ids */ - if (ISA_PNP_PROBE(device_get_parent(dev), dev, sio_ids) == ENXIO) - return (ENXIO); - return (sioprobe(dev, 0)); -} - -static int -sioprobe(dev, xrid) - device_t dev; - int xrid; -{ -#if 0 - static bool_t already_init; - device_t xdev; -#endif - struct com_s *com; - bool_t failures[10]; - int fn; - device_t idev; - Port_t iobase; - intrmask_t irqmap[4]; - intrmask_t irqs; - u_char mcr_image; - int result; - u_long xirq; - u_int flags = device_get_flags(dev); - int rid; - struct resource *port; - - rid = xrid; - port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, - 0, ~0, IO_COMSIZE, RF_ACTIVE); - if (!port) - return (ENXIO); - - com = device_get_softc(dev); - com->bst = rman_get_bustag(port); - com->bsh = rman_get_bushandle(port); - - while (sio_inited != 2) - if (atomic_cmpset_int(&sio_inited, 0, 1)) { - mtx_init(&sio_lock, driver_name, (comconsole != -1) ? - MTX_SPIN | MTX_QUIET : MTX_SPIN); - atomic_store_rel_int(&sio_inited, 2); - } - -#if 0 - /* - * XXX this is broken - when we are first called, there are no - * previously configured IO ports. We could hard code - * 0x3f8, 0x2f8, 0x3e8, 0x2e8 etc but that's probably worse. - * This code has been doing nothing since the conversion since - * "count" is zero the first time around. - */ - if (!already_init) { - /* - * Turn off MCR_IENABLE for all likely serial ports. An unused - * port with its MCR_IENABLE gate open will inhibit interrupts - * from any used port that shares the interrupt vector. - * XXX the gate enable is elsewhere for some multiports. - */ - device_t *devs; - int count, i, xioport; - - devclass_get_devices(sio_devclass, &devs, &count); - for (i = 0; i < count; i++) { - xdev = devs[i]; - if (device_is_enabled(xdev) && - bus_get_resource(xdev, SYS_RES_IOPORT, 0, &xioport, - NULL) == 0) - outb(xioport + com_mcr, 0); - } - free(devs, M_TEMP); - already_init = TRUE; - } -#endif - - if (COM_LLCONSOLE(flags)) { - printf("sio%d: reserved for low-level i/o\n", - device_get_unit(dev)); - bus_release_resource(dev, SYS_RES_IOPORT, rid, port); - return (ENXIO); - } - - /* - * If the device is on a multiport card and has an AST/4 - * compatible interrupt control register, initialize this - * register and prepare to leave MCR_IENABLE clear in the mcr. - * Otherwise, prepare to set MCR_IENABLE in the mcr. - * Point idev to the device struct giving the correct id_irq. - * This is the struct for the master device if there is one. - */ - idev = dev; - mcr_image = MCR_IENABLE; -#ifdef COM_MULTIPORT - if (COM_ISMULTIPORT(flags)) { - Port_t xiobase; - u_long io; - - idev = devclass_get_device(sio_devclass, COM_MPMASTER(flags)); - if (idev == NULL) { - printf("sio%d: master device %d not configured\n", - device_get_unit(dev), COM_MPMASTER(flags)); - idev = dev; - } - if (!COM_NOTAST4(flags)) { - if (bus_get_resource(idev, SYS_RES_IOPORT, 0, &io, - NULL) == 0) { - xiobase = io; - if (bus_get_resource(idev, SYS_RES_IRQ, 0, - NULL, NULL) == 0) - outb(xiobase + com_scr, 0x80); - else - outb(xiobase + com_scr, 0); - } - mcr_image = 0; - } - } -#endif /* COM_MULTIPORT */ - if (bus_get_resource(idev, SYS_RES_IRQ, 0, NULL, NULL) != 0) - mcr_image = 0; - - bzero(failures, sizeof failures); - iobase = rman_get_start(port); - - /* - * We don't want to get actual interrupts, just masked ones. - * Interrupts from this line should already be masked in the ICU, - * but mask them in the processor as well in case there are some - * (misconfigured) shared interrupts. - */ - mtx_lock_spin(&sio_lock); -/* EXTRA DELAY? */ - - /* - * Initialize the speed and the word size and wait long enough to - * drain the maximum of 16 bytes of junk in device output queues. - * The speed is undefined after a master reset and must be set - * before relying on anything related to output. There may be - * junk after a (very fast) soft reboot and (apparently) after - * master reset. - * XXX what about the UART bug avoided by waiting in comparam()? - * We don't want to to wait long enough to drain at 2 bps. - */ - if (iobase == siocniobase) - DELAY((16 + 1) * 1000000 / (comdefaultrate / 10)); - else { - sio_setreg(com, com_cfcr, CFCR_DLAB | CFCR_8BITS); - sio_setreg(com, com_dlbl, COMBRD(SIO_TEST_SPEED) & 0xff); - sio_setreg(com, com_dlbh, (u_int) COMBRD(SIO_TEST_SPEED) >> 8); - sio_setreg(com, com_cfcr, CFCR_8BITS); - DELAY((16 + 1) * 1000000 / (SIO_TEST_SPEED / 10)); - } - - /* - * Enable the interrupt gate and disable device interupts. This - * should leave the device driving the interrupt line low and - * guarantee an edge trigger if an interrupt can be generated. - */ -/* EXTRA DELAY? */ - sio_setreg(com, com_mcr, mcr_image); - sio_setreg(com, com_ier, 0); - DELAY(1000); /* XXX */ - irqmap[0] = isa_irq_pending(); - - /* - * Attempt to set loopback mode so that we can send a null byte - * without annoying any external device. - */ -/* EXTRA DELAY? */ - sio_setreg(com, com_mcr, mcr_image | MCR_LOOPBACK); - - /* - * Attempt to generate an output interrupt. On 8250's, setting - * IER_ETXRDY generates an interrupt independent of the current - * setting and independent of whether the THR is empty. On 16450's, - * setting IER_ETXRDY generates an interrupt independent of the - * current setting. On 16550A's, setting IER_ETXRDY only - * generates an interrupt when IER_ETXRDY is not already set. - */ - sio_setreg(com, com_ier, IER_ETXRDY); - - /* - * On some 16x50 incompatibles, setting IER_ETXRDY doesn't generate - * an interrupt. They'd better generate one for actually doing - * output. Loopback may be broken on the same incompatibles but - * it's unlikely to do more than allow the null byte out. - */ - sio_setreg(com, com_data, 0); - DELAY((1 + 2) * 1000000 / (SIO_TEST_SPEED / 10)); - - /* - * Turn off loopback mode so that the interrupt gate works again - * (MCR_IENABLE was hidden). This should leave the device driving - * an interrupt line high. It doesn't matter if the interrupt - * line oscillates while we are not looking at it, since interrupts - * are disabled. - */ -/* EXTRA DELAY? */ - sio_setreg(com, com_mcr, mcr_image); - - /* - * Some pcmcia cards have the "TXRDY bug", so we check everyone - * for IIR_TXRDY implementation ( Palido 321s, DC-1S... ) - */ - if (COM_NOPROBE(flags)) { - /* Reading IIR register twice */ - for (fn = 0; fn < 2; fn ++) { - DELAY(10000); - failures[6] = sio_getreg(com, com_iir); - } - /* Check IIR_TXRDY clear ? */ - result = 0; - if (failures[6] & IIR_TXRDY) { - /* Nop, Double check with clearing IER */ - sio_setreg(com, com_ier, 0); - if (sio_getreg(com, com_iir) & IIR_NOPEND) { - /* Ok. we're familia this gang */ - SET_FLAG(dev, COM_C_IIR_TXRDYBUG); - } else { - /* Unknown, Just omit this chip.. XXX */ - result = ENXIO; - sio_setreg(com, com_mcr, 0); - } - } else { - /* OK. this is well-known guys */ - CLR_FLAG(dev, COM_C_IIR_TXRDYBUG); - } - sio_setreg(com, com_ier, 0); - sio_setreg(com, com_cfcr, CFCR_8BITS); - mtx_unlock_spin(&sio_lock); - bus_release_resource(dev, SYS_RES_IOPORT, rid, port); - return (iobase == siocniobase ? 0 : result); - } - - /* - * Check that - * o the CFCR, IER and MCR in UART hold the values written to them - * (the values happen to be all distinct - this is good for - * avoiding false positive tests from bus echoes). - * o an output interrupt is generated and its vector is correct. - * o the interrupt goes away when the IIR in the UART is read. - */ -/* EXTRA DELAY? */ - failures[0] = sio_getreg(com, com_cfcr) - CFCR_8BITS; - failures[1] = sio_getreg(com, com_ier) - IER_ETXRDY; - failures[2] = sio_getreg(com, com_mcr) - mcr_image; - DELAY(10000); /* Some internal modems need this time */ - irqmap[1] = isa_irq_pending(); - failures[4] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_TXRDY; - DELAY(1000); /* XXX */ - irqmap[2] = isa_irq_pending(); - failures[6] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; - - /* - * Turn off all device interrupts and check that they go off properly. - * Leave MCR_IENABLE alone. For ports without a master port, it gates - * the OUT2 output of the UART to - * the ICU input. Closing the gate would give a floating ICU input - * (unless there is another device driving it) and spurious interrupts. - * (On the system that this was first tested on, the input floats high - * and gives a (masked) interrupt as soon as the gate is closed.) - */ - sio_setreg(com, com_ier, 0); - sio_setreg(com, com_cfcr, CFCR_8BITS); /* dummy to avoid bus echo */ - failures[7] = sio_getreg(com, com_ier); - DELAY(1000); /* XXX */ - irqmap[3] = isa_irq_pending(); - failures[9] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND; - - mtx_unlock_spin(&sio_lock); - - irqs = irqmap[1] & ~irqmap[0]; - if (bus_get_resource(idev, SYS_RES_IRQ, 0, &xirq, NULL) == 0 && - ((1 << xirq) & irqs) == 0) - printf( - "sio%d: configured irq %ld not in bitmap of probed irqs %#x\n", - device_get_unit(dev), xirq, irqs); - if (bootverbose) - printf("sio%d: irq maps: %#x %#x %#x %#x\n", - device_get_unit(dev), - irqmap[0], irqmap[1], irqmap[2], irqmap[3]); - - result = 0; - for (fn = 0; fn < sizeof failures; ++fn) - if (failures[fn]) { - sio_setreg(com, com_mcr, 0); - result = ENXIO; - if (bootverbose) { - printf("sio%d: probe failed test(s):", - device_get_unit(dev)); - for (fn = 0; fn < sizeof failures; ++fn) - if (failures[fn]) - printf(" %d", fn); - printf("\n"); - } - break; - } - bus_release_resource(dev, SYS_RES_IOPORT, rid, port); - return (iobase == siocniobase ? 0 : result); -} - -#ifdef COM_ESP -static int -espattach(com, esp_port) - struct com_s *com; - Port_t esp_port; -{ - u_char dips; - u_char val; - - /* - * Check the ESP-specific I/O port to see if we're an ESP - * card. If not, return failure immediately. - */ - if ((inb(esp_port) & 0xf3) == 0) { - printf(" port 0x%x is not an ESP board?\n", esp_port); - return (0); - } - - /* - * We've got something that claims to be a Hayes ESP card. - * Let's hope so. - */ - - /* Get the dip-switch configuration */ - outb(esp_port + ESP_CMD1, ESP_GETDIPS); - dips = inb(esp_port + ESP_STATUS1); - - /* - * Bits 0,1 of dips say which COM port we are. - */ - if (rman_get_start(com->ioportres) == likely_com_ports[dips & 0x03]) - printf(" : ESP"); - else { - printf(" esp_port has com %d\n", dips & 0x03); - return (0); - } - - /* - * Check for ESP version 2.0 or later: bits 4,5,6 = 010. - */ - outb(esp_port + ESP_CMD1, ESP_GETTEST); - val = inb(esp_port + ESP_STATUS1); /* clear reg 1 */ - val = inb(esp_port + ESP_STATUS2); - if ((val & 0x70) < 0x20) { - printf("-old (%o)", val & 0x70); - return (0); - } - - /* - * Check for ability to emulate 16550: bit 7 == 1 - */ - if ((dips & 0x80) == 0) { - printf(" slave"); - return (0); - } - - /* - * Okay, we seem to be a Hayes ESP card. Whee. - */ - com->esp = TRUE; - com->esp_port = esp_port; - return (1); -} -#endif /* COM_ESP */ - -static int -sio_isa_attach(dev) - device_t dev; -{ - return (sioattach(dev, 0)); -} - -static int -sioattach(dev, xrid) - device_t dev; - int xrid; -{ - struct com_s *com; -#ifdef COM_ESP - Port_t *espp; -#endif - Port_t iobase; - int unit; - u_int flags; - int rid; - struct resource *port; - int ret; - - rid = xrid; - port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, - 0, ~0, IO_COMSIZE, RF_ACTIVE); - if (!port) - return (ENXIO); - - iobase = rman_get_start(port); - unit = device_get_unit(dev); - com = device_get_softc(dev); - flags = device_get_flags(dev); - - if (unit >= sio_numunits) - sio_numunits = unit + 1; - /* - * sioprobe() has initialized the device registers as follows: - * o cfcr = CFCR_8BITS. - * It is most important that CFCR_DLAB is off, so that the - * data port is not hidden when we enable interrupts. - * o ier = 0. - * Interrupts are only enabled when the line is open. - * o mcr = MCR_IENABLE, or 0 if the port has AST/4 compatible - * interrupt control register or the config specifies no irq. - * Keeping MCR_DTR and MCR_RTS off might stop the external - * device from sending before we are ready. - */ - bzero(com, sizeof *com); - com->unit = unit; - com->ioportres = port; - com->bst = rman_get_bustag(port); - com->bsh = rman_get_bushandle(port); - com->cfcr_image = CFCR_8BITS; - com->dtr_wait = 3 * hz; - com->loses_outints = COM_LOSESOUTINTS(flags) != 0; - com->no_irq = bus_get_resource(dev, SYS_RES_IRQ, 0, NULL, NULL) != 0; - com->tx_fifo_size = 1; - com->obufs[0].l_head = com->obuf1; - com->obufs[1].l_head = com->obuf2; - - com->data_port = iobase + com_data; - com->int_id_port = iobase + com_iir; - com->modem_ctl_port = iobase + com_mcr; - com->mcr_image = inb(com->modem_ctl_port); - com->line_status_port = iobase + com_lsr; - com->modem_status_port = iobase + com_msr; - com->intr_ctl_port = iobase + com_ier; - - /* - * We don't use all the flags from <sys/ttydefaults.h> since they - * are only relevant for logins. It's important to have echo off - * initially so that the line doesn't start blathering before the - * echo flag can be turned off. - */ - com->it_in.c_iflag = 0; - com->it_in.c_oflag = 0; - com->it_in.c_cflag = TTYDEF_CFLAG; - com->it_in.c_lflag = 0; - if (unit == comconsole) { - com->it_in.c_iflag = TTYDEF_IFLAG; - com->it_in.c_oflag = TTYDEF_OFLAG; - com->it_in.c_cflag = TTYDEF_CFLAG | CLOCAL; - com->it_in.c_lflag = TTYDEF_LFLAG; - com->lt_out.c_cflag = com->lt_in.c_cflag = CLOCAL; - com->lt_out.c_ispeed = com->lt_out.c_ospeed = - com->lt_in.c_ispeed = com->lt_in.c_ospeed = - com->it_in.c_ispeed = com->it_in.c_ospeed = comdefaultrate; - } else - com->it_in.c_ispeed = com->it_in.c_ospeed = TTYDEF_SPEED; - if (siosetwater(com, com->it_in.c_ispeed) != 0) { - mtx_unlock_spin(&sio_lock); - /* - * Leave i/o resources allocated if this is a `cn'-level - * console, so that other devices can't snarf them. - */ - if (iobase != siocniobase) - bus_release_resource(dev, SYS_RES_IOPORT, rid, port); - return (ENOMEM); - } - mtx_unlock_spin(&sio_lock); - termioschars(&com->it_in); - com->it_out = com->it_in; - - /* attempt to determine UART type */ - printf("sio%d: type", unit); - - -#ifdef COM_MULTIPORT - if (!COM_ISMULTIPORT(flags) && !COM_IIR_TXRDYBUG(flags)) -#else - if (!COM_IIR_TXRDYBUG(flags)) -#endif - { - u_char scr; - u_char scr1; - u_char scr2; - - scr = sio_getreg(com, com_scr); - sio_setreg(com, com_scr, 0xa5); - scr1 = sio_getreg(com, com_scr); - sio_setreg(com, com_scr, 0x5a); - scr2 = sio_getreg(com, com_scr); - sio_setreg(com, com_scr, scr); - if (scr1 != 0xa5 || scr2 != 0x5a) { - printf(" 8250"); - goto determined_type; - } - } - sio_setreg(com, com_fifo, FIFO_ENABLE | FIFO_RX_HIGH); - DELAY(100); - com->st16650a = 0; - switch (inb(com->int_id_port) & IIR_FIFO_MASK) { - case FIFO_RX_LOW: - printf(" 16450"); - break; - case FIFO_RX_MEDL: - printf(" 16450?"); - break; - case FIFO_RX_MEDH: - printf(" 16550?"); - break; - case FIFO_RX_HIGH: - if (COM_NOFIFO(flags)) { - printf(" 16550A fifo disabled"); - } else { - com->hasfifo = TRUE; - if (COM_ST16650A(flags)) { - com->st16650a = 1; - com->tx_fifo_size = 32; - printf(" ST16650A"); - } else { - com->tx_fifo_size = COM_FIFOSIZE(flags); - printf(" 16550A"); - } - } -#ifdef COM_ESP - for (espp = likely_esp_ports; *espp != 0; espp++) - if (espattach(com, *espp)) { - com->tx_fifo_size = 1024; - break; - } -#endif - if (!com->st16650a) { - if (!com->tx_fifo_size) - com->tx_fifo_size = 16; - else - printf(" lookalike with %d bytes FIFO", - com->tx_fifo_size); - } - - break; - } - -#ifdef COM_ESP - if (com->esp) { - /* - * Set 16550 compatibility mode. - * We don't use the ESP_MODE_SCALE bit to increase the - * fifo trigger levels because we can't handle large - * bursts of input. - * XXX flow control should be set in comparam(), not here. - */ - outb(com->esp_port + ESP_CMD1, ESP_SETMODE); - outb(com->esp_port + ESP_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO); - - /* Set RTS/CTS flow control. */ - outb(com->esp_port + ESP_CMD1, ESP_SETFLOWTYPE); - outb(com->esp_port + ESP_CMD2, ESP_FLOW_RTS); - outb(com->esp_port + ESP_CMD2, ESP_FLOW_CTS); - - /* Set flow-control levels. */ - outb(com->esp_port + ESP_CMD1, ESP_SETRXFLOW); - outb(com->esp_port + ESP_CMD2, HIBYTE(768)); - outb(com->esp_port + ESP_CMD2, LOBYTE(768)); - outb(com->esp_port + ESP_CMD2, HIBYTE(512)); - outb(com->esp_port + ESP_CMD2, LOBYTE(512)); - } -#endif /* COM_ESP */ - sio_setreg(com, com_fifo, 0); -determined_type: ; - -#ifdef COM_MULTIPORT - if (COM_ISMULTIPORT(flags)) { - device_t masterdev; - - com->multiport = TRUE; - printf(" (multiport"); - if (unit == COM_MPMASTER(flags)) - printf(" master"); - printf(")"); - masterdev = devclass_get_device(sio_devclass, - COM_MPMASTER(flags)); - com->no_irq = (masterdev == NULL || bus_get_resource(masterdev, - SYS_RES_IRQ, 0, NULL, NULL) != 0); - } -#endif /* COM_MULTIPORT */ - if (unit == comconsole) - printf(", console"); - if (COM_IIR_TXRDYBUG(flags)) - printf(" with a bogus IIR_TXRDY register"); - printf("\n"); - - if (sio_fast_ih == NULL) { - swi_add(&tty_ithd, "tty:sio", siopoll, NULL, SWI_TTY, 0, - &sio_fast_ih); - swi_add(&clk_ithd, "tty:sio", siopoll, NULL, SWI_TTY, 0, - &sio_slow_ih); - } - com->devs[0] = make_dev(&sio_cdevsw, unit, - UID_ROOT, GID_WHEEL, 0600, "ttyd%r", unit); - com->devs[1] = make_dev(&sio_cdevsw, unit | CONTROL_INIT_STATE, - UID_ROOT, GID_WHEEL, 0600, "ttyid%r", unit); - com->devs[2] = make_dev(&sio_cdevsw, unit | CONTROL_LOCK_STATE, - UID_ROOT, GID_WHEEL, 0600, "ttyld%r", unit); - com->devs[3] = make_dev(&sio_cdevsw, unit | CALLOUT_MASK, - UID_UUCP, GID_DIALER, 0660, "cuaa%r", unit); - com->devs[4] = make_dev(&sio_cdevsw, - unit | CALLOUT_MASK | CONTROL_INIT_STATE, - UID_UUCP, GID_DIALER, 0660, "cuaia%r", unit); - com->devs[5] = make_dev(&sio_cdevsw, - unit | CALLOUT_MASK | CONTROL_LOCK_STATE, - UID_UUCP, GID_DIALER, 0660, "cuala%r", unit); - com->flags = flags; - com->pps.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR; - pps_init(&com->pps); - - rid = 0; - com->irqres = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0ul, ~0ul, 1, - RF_ACTIVE); - if (com->irqres) { - ret = BUS_SETUP_INTR(device_get_parent(dev), dev, com->irqres, - INTR_TYPE_TTY | INTR_FAST, - siointr, com, &com->cookie); - if (ret) { - ret = BUS_SETUP_INTR(device_get_parent(dev), dev, - com->irqres, INTR_TYPE_TTY, - siointr, com, &com->cookie); - if (ret == 0) - device_printf(dev, "unable to activate interrupt in fast mode - using normal mode\n"); - } - if (ret) - device_printf(dev, "could not activate interrupt\n"); -#if defined(DDB) && (defined(BREAK_TO_DEBUGGER) || \ - defined(ALT_BREAK_TO_DEBUGGER)) - /* - * Enable interrupts for early break-to-debugger support - * on the console. - */ - if (ret == 0 && unit == comconsole) - outb(siocniobase + com_ier, IER_ERXRDY | IER_ERLS | - IER_EMSC); -#endif - } - - return (0); -} - -static int -sioopen(dev, flag, mode, td) - dev_t dev; - int flag; - int mode; - struct thread *td; -{ - struct com_s *com; - int error; - int mynor; - int s; - struct tty *tp; - int unit; - - mynor = minor(dev); - unit = MINOR_TO_UNIT(mynor); - com = com_addr(unit); - if (com == NULL) - return (ENXIO); - if (com->gone) - return (ENXIO); - if (mynor & CONTROL_MASK) - return (0); - tp = dev->si_tty = com->tp = ttymalloc(com->tp); - s = spltty(); - /* - * We jump to this label after all non-interrupted sleeps to pick - * up any changes of the device state. - */ -open_top: - while (com->state & CS_DTR_OFF) { - error = tsleep(&com->dtr_wait, TTIPRI | PCATCH, "siodtr", 0); - if (com_addr(unit) == NULL) - return (ENXIO); - if (error != 0 || com->gone) - goto out; - } - if (tp->t_state & TS_ISOPEN) { - /* - * The device is open, so everything has been initialized. - * Handle conflicts. - */ - if (mynor & CALLOUT_MASK) { - if (!com->active_out) { - error = EBUSY; - goto out; - } - } else { - if (com->active_out) { - if (flag & O_NONBLOCK) { - error = EBUSY; - goto out; - } - error = tsleep(&com->active_out, - TTIPRI | PCATCH, "siobi", 0); - if (com_addr(unit) == NULL) - return (ENXIO); - if (error != 0 || com->gone) - goto out; - goto open_top; - } - } - if (tp->t_state & TS_XCLUDE && - suser_td(td)) { - error = EBUSY; - goto out; - } - } else { - /* - * The device isn't open, so there are no conflicts. - * Initialize it. Initialization is done twice in many - * cases: to preempt sleeping callin opens if we are - * callout, and to complete a callin open after DCD rises. - */ - tp->t_oproc = comstart; - tp->t_param = comparam; - tp->t_stop = comstop; - tp->t_dev = dev; - tp->t_termios = mynor & CALLOUT_MASK - ? com->it_out : com->it_in; - (void)commctl(com, TIOCM_DTR | TIOCM_RTS, DMSET); - com->poll = com->no_irq; - com->poll_output = com->loses_outints; - ++com->wopeners; - error = comparam(tp, &tp->t_termios); - --com->wopeners; - if (error != 0) - goto out; - /* - * XXX we should goto open_top if comparam() slept. - */ - if (com->hasfifo) { - /* - * (Re)enable and drain fifos. - * - * Certain SMC chips cause problems if the fifos - * are enabled while input is ready. Turn off the - * fifo if necessary to clear the input. We test - * the input ready bit after enabling the fifos - * since we've already enabled them in comparam() - * and to handle races between enabling and fresh - * input. - */ - while (TRUE) { - sio_setreg(com, com_fifo, - FIFO_RCV_RST | FIFO_XMT_RST - | com->fifo_image); - /* - * XXX the delays are for superstitious - * historical reasons. It must be less than - * the character time at the maximum - * supported speed (87 usec at 115200 bps - * 8N1). Otherwise we might loop endlessly - * if data is streaming in. We used to use - * delays of 100. That usually worked - * because DELAY(100) used to usually delay - * for about 85 usec instead of 100. - */ - DELAY(50); - if (!(inb(com->line_status_port) & LSR_RXRDY)) - break; - sio_setreg(com, com_fifo, 0); - DELAY(50); - (void) inb(com->data_port); - } - } - - mtx_lock_spin(&sio_lock); - (void) inb(com->line_status_port); - (void) inb(com->data_port); - com->prev_modem_status = com->last_modem_status - = inb(com->modem_status_port); - if (COM_IIR_TXRDYBUG(com->flags)) { - outb(com->intr_ctl_port, IER_ERXRDY | IER_ERLS - | IER_EMSC); - } else { - outb(com->intr_ctl_port, IER_ERXRDY | IER_ETXRDY - | IER_ERLS | IER_EMSC); - } - mtx_unlock_spin(&sio_lock); - /* - * Handle initial DCD. Callout devices get a fake initial - * DCD (trapdoor DCD). If we are callout, then any sleeping - * callin opens get woken up and resume sleeping on "siobi" - * instead of "siodcd". - */ - /* - * XXX `mynor & CALLOUT_MASK' should be - * `tp->t_cflag & (SOFT_CARRIER | TRAPDOOR_CARRIER) where - * TRAPDOOR_CARRIER is the default initial state for callout - * devices and SOFT_CARRIER is like CLOCAL except it hides - * the true carrier. - */ - if (com->prev_modem_status & MSR_DCD || mynor & CALLOUT_MASK) - (*linesw[tp->t_line].l_modem)(tp, 1); - } - /* - * Wait for DCD if necessary. - */ - if (!(tp->t_state & TS_CARR_ON) && !(mynor & CALLOUT_MASK) - && !(tp->t_cflag & CLOCAL) && !(flag & O_NONBLOCK)) { - ++com->wopeners; - error = tsleep(TSA_CARR_ON(tp), TTIPRI | PCATCH, "siodcd", 0); - if (com_addr(unit) == NULL) - return (ENXIO); - --com->wopeners; - if (error != 0 || com->gone) - goto out; - goto open_top; - } - error = (*linesw[tp->t_line].l_open)(dev, tp); - disc_optim(tp, &tp->t_termios, com); - if (tp->t_state & TS_ISOPEN && mynor & CALLOUT_MASK) - com->active_out = TRUE; - siosettimeout(); -out: - splx(s); - if (!(tp->t_state & TS_ISOPEN) && com->wopeners == 0) - comhardclose(com); - return (error); -} - -static int -sioclose(dev, flag, mode, td) - dev_t dev; - int flag; - int mode; - struct thread *td; -{ - struct com_s *com; - int mynor; - int s; - struct tty *tp; - - mynor = minor(dev); - if (mynor & CONTROL_MASK) - return (0); - com = com_addr(MINOR_TO_UNIT(mynor)); - if (com == NULL) - return (ENODEV); - tp = com->tp; - s = spltty(); - (*linesw[tp->t_line].l_close)(tp, flag); - disc_optim(tp, &tp->t_termios, com); - comstop(tp, FREAD | FWRITE); - comhardclose(com); - ttyclose(tp); - siosettimeout(); - splx(s); - if (com->gone) { - printf("sio%d: gone\n", com->unit); - s = spltty(); - if (com->ibuf != NULL) - free(com->ibuf, M_DEVBUF); - bzero(tp, sizeof *tp); - splx(s); - } - return (0); -} - -static void -comhardclose(com) - struct com_s *com; -{ - int s; - struct tty *tp; - int unit; - - unit = com->unit; - s = spltty(); - com->poll = FALSE; - com->poll_output = FALSE; - com->do_timestamp = FALSE; - com->do_dcd_timestamp = FALSE; - com->pps.ppsparam.mode = 0; - sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); - tp = com->tp; - -#if defined(DDB) && (defined(BREAK_TO_DEBUGGER) || \ - defined(ALT_BREAK_TO_DEBUGGER)) - /* - * Leave interrupts enabled and don't clear DTR if this is the - * console. This allows us to detect break-to-debugger events - * while the console device is closed. - */ - if (com->unit != comconsole) -#endif - { - sio_setreg(com, com_ier, 0); - if (tp->t_cflag & HUPCL - /* - * XXX we will miss any carrier drop between here and the - * next open. Perhaps we should watch DCD even when the - * port is closed; it is not sufficient to check it at - * the next open because it might go up and down while - * we're not watching. - */ - || (!com->active_out - && !(com->prev_modem_status & MSR_DCD) - && !(com->it_in.c_cflag & CLOCAL)) - || !(tp->t_state & TS_ISOPEN)) { - (void)commctl(com, TIOCM_DTR, DMBIC); - if (com->dtr_wait != 0 && !(com->state & CS_DTR_OFF)) { - timeout(siodtrwakeup, com, com->dtr_wait); - com->state |= CS_DTR_OFF; - } - } - } - if (com->hasfifo) { - /* - * Disable fifos so that they are off after controlled - * reboots. Some BIOSes fail to detect 16550s when the - * fifos are enabled. - */ - sio_setreg(com, com_fifo, 0); - } - com->active_out = FALSE; - wakeup(&com->active_out); - wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */ - splx(s); -} - -static int -sioread(dev, uio, flag) - dev_t dev; - struct uio *uio; - int flag; -{ - int mynor; - struct com_s *com; - - mynor = minor(dev); - if (mynor & CONTROL_MASK) - return (ENODEV); - com = com_addr(MINOR_TO_UNIT(mynor)); - if (com == NULL || com->gone) - return (ENODEV); - return ((*linesw[com->tp->t_line].l_read)(com->tp, uio, flag)); -} - -static int -siowrite(dev, uio, flag) - dev_t dev; - struct uio *uio; - int flag; -{ - int mynor; - struct com_s *com; - int unit; - - mynor = minor(dev); - if (mynor & CONTROL_MASK) - return (ENODEV); - - unit = MINOR_TO_UNIT(mynor); - com = com_addr(unit); - if (com == NULL || com->gone) - return (ENODEV); - /* - * (XXX) We disallow virtual consoles if the physical console is - * a serial port. This is in case there is a display attached that - * is not the console. In that situation we don't need/want the X - * server taking over the console. - */ - if (constty != NULL && unit == comconsole) - constty = NULL; - return ((*linesw[com->tp->t_line].l_write)(com->tp, uio, flag)); -} - -static void -siobusycheck(chan) - void *chan; -{ - struct com_s *com; - int s; - - com = (struct com_s *)chan; - - /* - * Clear TS_BUSY if low-level output is complete. - * spl locking is sufficient because siointr1() does not set CS_BUSY. - * If siointr1() clears CS_BUSY after we look at it, then we'll get - * called again. Reading the line status port outside of siointr1() - * is safe because CS_BUSY is clear so there are no output interrupts - * to lose. - */ - s = spltty(); - if (com->state & CS_BUSY) - com->extra_state &= ~CSE_BUSYCHECK; /* False alarm. */ - else if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) - == (LSR_TSRE | LSR_TXRDY)) { - com->tp->t_state &= ~TS_BUSY; - ttwwakeup(com->tp); - com->extra_state &= ~CSE_BUSYCHECK; - } else - timeout(siobusycheck, com, hz / 100); - splx(s); -} - -static void -siodtrwakeup(chan) - void *chan; -{ - struct com_s *com; - - com = (struct com_s *)chan; - com->state &= ~CS_DTR_OFF; - wakeup(&com->dtr_wait); -} - -/* - * Call this function with the sio_lock mutex held. It will return with the - * lock still held. - */ -static void -sioinput(com) - struct com_s *com; -{ - u_char *buf; - int incc; - u_char line_status; - int recv_data; - struct tty *tp; - - buf = com->ibuf; - tp = com->tp; - if (!(tp->t_state & TS_ISOPEN) || !(tp->t_cflag & CREAD)) { - com_events -= (com->iptr - com->ibuf); - com->iptr = com->ibuf; - return; - } - if (tp->t_state & TS_CAN_BYPASS_L_RINT) { - /* - * Avoid the grotesquely inefficient lineswitch routine - * (ttyinput) in "raw" mode. It usually takes about 450 - * instructions (that's without canonical processing or echo!). - * slinput is reasonably fast (usually 40 instructions plus - * call overhead). - */ - do { - /* - * This may look odd, but it is using save-and-enable - * semantics instead of the save-and-disable semantics - * that are used everywhere else. - */ - mtx_unlock_spin(&sio_lock); - incc = com->iptr - buf; - if (tp->t_rawq.c_cc + incc > tp->t_ihiwat - && (com->state & CS_RTS_IFLOW - || tp->t_iflag & IXOFF) - && !(tp->t_state & TS_TBLOCK)) - ttyblock(tp); - com->delta_error_counts[CE_TTY_BUF_OVERFLOW] - += b_to_q((char *)buf, incc, &tp->t_rawq); - buf += incc; - tk_nin += incc; - tk_rawcc += incc; - tp->t_rawcc += incc; - ttwakeup(tp); - if (tp->t_state & TS_TTSTOP - && (tp->t_iflag & IXANY - || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) { - tp->t_state &= ~TS_TTSTOP; - tp->t_lflag &= ~FLUSHO; - comstart(tp); - } - mtx_lock_spin(&sio_lock); - } while (buf < com->iptr); - } else { - do { - /* - * This may look odd, but it is using save-and-enable - * semantics instead of the save-and-disable semantics - * that are used everywhere else. - */ - mtx_unlock_spin(&sio_lock); - line_status = buf[com->ierroff]; - recv_data = *buf++; - if (line_status - & (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) { - if (line_status & LSR_BI) - recv_data |= TTY_BI; - if (line_status & LSR_FE) - recv_data |= TTY_FE; - if (line_status & LSR_OE) - recv_data |= TTY_OE; - if (line_status & LSR_PE) - recv_data |= TTY_PE; - } - (*linesw[tp->t_line].l_rint)(recv_data, tp); - mtx_lock_spin(&sio_lock); - } while (buf < com->iptr); - } - com_events -= (com->iptr - com->ibuf); - com->iptr = com->ibuf; - - /* - * There is now room for another low-level buffer full of input, - * so enable RTS if it is now disabled and there is room in the - * high-level buffer. - */ - if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & MCR_RTS) && - !(tp->t_state & TS_TBLOCK)) - outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); -} - -void -siointr(arg) - void *arg; -{ - struct com_s *com; - -#ifndef COM_MULTIPORT - com = (struct com_s *)arg; - - mtx_lock_spin(&sio_lock); - siointr1(com); - mtx_unlock_spin(&sio_lock); -#else /* COM_MULTIPORT */ - bool_t possibly_more_intrs; - int unit; - - /* - * Loop until there is no activity on any port. This is necessary - * to get an interrupt edge more than to avoid another interrupt. - * If the IRQ signal is just an OR of the IRQ signals from several - * devices, then the edge from one may be lost because another is - * on. - */ - mtx_lock_spin(&sio_lock); - do { - possibly_more_intrs = FALSE; - for (unit = 0; unit < sio_numunits; ++unit) { - com = com_addr(unit); - /* - * XXX COM_LOCK(); - * would it work here, or be counter-productive? - */ - if (com != NULL - && !com->gone - && (inb(com->int_id_port) & IIR_IMASK) - != IIR_NOPEND) { - siointr1(com); - possibly_more_intrs = TRUE; - } - /* XXX COM_UNLOCK(); */ - } - } while (possibly_more_intrs); - mtx_unlock_spin(&sio_lock); -#endif /* COM_MULTIPORT */ -} - -static void -siointr1(com) - struct com_s *com; -{ - u_char line_status; - u_char modem_status; - u_char *ioptr; - u_char recv_data; - u_char int_ctl; - u_char int_ctl_new; - struct timecounter *tc; - u_int count; - - int_ctl = inb(com->intr_ctl_port); - int_ctl_new = int_ctl; - - while (!com->gone) { - if (com->pps.ppsparam.mode & PPS_CAPTUREBOTH) { - modem_status = inb(com->modem_status_port); - if ((modem_status ^ com->last_modem_status) & MSR_DCD) { - tc = timecounter; - count = tc->tc_get_timecount(tc); - pps_event(&com->pps, tc, count, - (modem_status & MSR_DCD) ? - PPS_CAPTUREASSERT : PPS_CAPTURECLEAR); - } - } - line_status = inb(com->line_status_port); - - /* input event? (check first to help avoid overruns) */ - while (line_status & LSR_RCV_MASK) { - /* break/unnattached error bits or real input? */ - if (!(line_status & LSR_RXRDY)) - recv_data = 0; - else - recv_data = inb(com->data_port); -#if defined(DDB) && defined(ALT_BREAK_TO_DEBUGGER) - /* - * Solaris implements a new BREAK which is initiated - * by a character sequence CR ~ ^b which is similar - * to a familiar pattern used on Sun servers by the - * Remote Console. - */ -#define KEY_CRTLB 2 /* ^B */ -#define KEY_CR 13 /* CR '\r' */ -#define KEY_TILDE 126 /* ~ */ - - if (com->unit == comconsole) { - static int brk_state1 = 0, brk_state2 = 0; - if (recv_data == KEY_CR) { - brk_state1 = recv_data; - brk_state2 = 0; - } else if (brk_state1 == KEY_CR - && (recv_data == KEY_TILDE - || recv_data == KEY_CRTLB)) { - if (recv_data == KEY_TILDE) - brk_state2 = recv_data; - else if (brk_state2 == KEY_TILDE - && recv_data == KEY_CRTLB) { - breakpoint(); - brk_state1 = 0; - brk_state2 = 0; - goto cont; - } else - brk_state2 = 0; - } else - brk_state1 = 0; - } -#endif - if (line_status & (LSR_BI | LSR_FE | LSR_PE)) { - /* - * Don't store BI if IGNBRK or FE/PE if IGNPAR. - * Otherwise, push the work to a higher level - * (to handle PARMRK) if we're bypassing. - * Otherwise, convert BI/FE and PE+INPCK to 0. - * - * This makes bypassing work right in the - * usual "raw" case (IGNBRK set, and IGNPAR - * and INPCK clear). - * - * Note: BI together with FE/PE means just BI. - */ - if (line_status & LSR_BI) { -#if defined(DDB) && defined(BREAK_TO_DEBUGGER) - if (com->unit == comconsole) { - breakpoint(); - goto cont; - } -#endif - if (com->tp == NULL - || com->tp->t_iflag & IGNBRK) - goto cont; - } else { - if (com->tp == NULL - || com->tp->t_iflag & IGNPAR) - goto cont; - } - if (com->tp->t_state & TS_CAN_BYPASS_L_RINT - && (line_status & (LSR_BI | LSR_FE) - || com->tp->t_iflag & INPCK)) - recv_data = 0; - } - ++com->bytes_in; - if (com->hotchar != 0 && recv_data == com->hotchar) - swi_sched(sio_fast_ih, SWI_NOSWITCH); - ioptr = com->iptr; - if (ioptr >= com->ibufend) - CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW); - else { - if (com->do_timestamp) - microtime(&com->timestamp); - ++com_events; - swi_sched(sio_slow_ih, SWI_DELAY); -#if 0 /* for testing input latency vs efficiency */ -if (com->iptr - com->ibuf == 8) - swi_sched(sio_fast_ih, SWI_NOSWITCH); -#endif - ioptr[0] = recv_data; - ioptr[com->ierroff] = line_status; - com->iptr = ++ioptr; - if (ioptr == com->ihighwater - && com->state & CS_RTS_IFLOW) - outb(com->modem_ctl_port, - com->mcr_image &= ~MCR_RTS); - if (line_status & LSR_OE) - CE_RECORD(com, CE_OVERRUN); - } -cont: - /* - * "& 0x7F" is to avoid the gcc-1.40 generating a slow - * jump from the top of the loop to here - */ - line_status = inb(com->line_status_port) & 0x7F; - } - - /* modem status change? (always check before doing output) */ - modem_status = inb(com->modem_status_port); - if (modem_status != com->last_modem_status) { - if (com->do_dcd_timestamp - && !(com->last_modem_status & MSR_DCD) - && modem_status & MSR_DCD) - microtime(&com->dcd_timestamp); - - /* - * Schedule high level to handle DCD changes. Note - * that we don't use the delta bits anywhere. Some - * UARTs mess them up, and it's easy to remember the - * previous bits and calculate the delta. - */ - com->last_modem_status = modem_status; - if (!(com->state & CS_CHECKMSR)) { - com_events += LOTS_OF_EVENTS; - com->state |= CS_CHECKMSR; - swi_sched(sio_fast_ih, SWI_NOSWITCH); - } - - /* handle CTS change immediately for crisp flow ctl */ - if (com->state & CS_CTS_OFLOW) { - if (modem_status & MSR_CTS) - com->state |= CS_ODEVREADY; - else - com->state &= ~CS_ODEVREADY; - } - } - - /* output queued and everything ready? */ - if (line_status & LSR_TXRDY - && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) { - ioptr = com->obufq.l_head; - if (com->tx_fifo_size > 1) { - u_int ocount; - - ocount = com->obufq.l_tail - ioptr; - if (ocount > com->tx_fifo_size) - ocount = com->tx_fifo_size; - com->bytes_out += ocount; - do - outb(com->data_port, *ioptr++); - while (--ocount != 0); - } else { - outb(com->data_port, *ioptr++); - ++com->bytes_out; - } - com->obufq.l_head = ioptr; - if (COM_IIR_TXRDYBUG(com->flags)) { - int_ctl_new = int_ctl | IER_ETXRDY; - } - if (ioptr >= com->obufq.l_tail) { - struct lbq *qp; - - qp = com->obufq.l_next; - qp->l_queued = FALSE; - qp = qp->l_next; - if (qp != NULL) { - com->obufq.l_head = qp->l_head; - com->obufq.l_tail = qp->l_tail; - com->obufq.l_next = qp; - } else { - /* output just completed */ - if (COM_IIR_TXRDYBUG(com->flags)) { - int_ctl_new = int_ctl & ~IER_ETXRDY; - } - com->state &= ~CS_BUSY; - } - if (!(com->state & CS_ODONE)) { - com_events += LOTS_OF_EVENTS; - com->state |= CS_ODONE; - /* handle at high level ASAP */ - swi_sched(sio_fast_ih, SWI_NOSWITCH); - } - } - if (COM_IIR_TXRDYBUG(com->flags) && (int_ctl != int_ctl_new)) { - outb(com->intr_ctl_port, int_ctl_new); - } - } - - /* finished? */ -#ifndef COM_MULTIPORT - if ((inb(com->int_id_port) & IIR_IMASK) == IIR_NOPEND) -#endif /* COM_MULTIPORT */ - return; - } -} - -static int -sioioctl(dev, cmd, data, flag, td) - dev_t dev; - u_long cmd; - caddr_t data; - int flag; - struct thread *td; -{ - struct com_s *com; - int error; - int mynor; - int s; - struct tty *tp; -#if defined(COMPAT_43) || defined(COMPAT_SUNOS) - u_long oldcmd; - struct termios term; -#endif - - mynor = minor(dev); - com = com_addr(MINOR_TO_UNIT(mynor)); - if (com == NULL || com->gone) - return (ENODEV); - if (mynor & CONTROL_MASK) { - struct termios *ct; - - switch (mynor & CONTROL_MASK) { - case CONTROL_INIT_STATE: - ct = mynor & CALLOUT_MASK ? &com->it_out : &com->it_in; - break; - case CONTROL_LOCK_STATE: - ct = mynor & CALLOUT_MASK ? &com->lt_out : &com->lt_in; - break; - default: - return (ENODEV); /* /dev/nodev */ - } - switch (cmd) { - case TIOCSETA: - error = suser_td(td); - if (error != 0) - return (error); - *ct = *(struct termios *)data; - return (0); - case TIOCGETA: - *(struct termios *)data = *ct; - return (0); - case TIOCGETD: - *(int *)data = TTYDISC; - return (0); - case TIOCGWINSZ: - bzero(data, sizeof(struct winsize)); - return (0); - default: - return (ENOTTY); - } - } - tp = com->tp; -#if defined(COMPAT_43) || defined(COMPAT_SUNOS) - term = tp->t_termios; - oldcmd = cmd; - error = ttsetcompat(tp, &cmd, data, &term); - if (error != 0) - return (error); - if (cmd != oldcmd) - data = (caddr_t)&term; -#endif - if (cmd == TIOCSETA || cmd == TIOCSETAW || cmd == TIOCSETAF) { - int cc; - struct termios *dt = (struct termios *)data; - struct termios *lt = mynor & CALLOUT_MASK - ? &com->lt_out : &com->lt_in; - - dt->c_iflag = (tp->t_iflag & lt->c_iflag) - | (dt->c_iflag & ~lt->c_iflag); - dt->c_oflag = (tp->t_oflag & lt->c_oflag) - | (dt->c_oflag & ~lt->c_oflag); - dt->c_cflag = (tp->t_cflag & lt->c_cflag) - | (dt->c_cflag & ~lt->c_cflag); - dt->c_lflag = (tp->t_lflag & lt->c_lflag) - | (dt->c_lflag & ~lt->c_lflag); - for (cc = 0; cc < NCCS; ++cc) - if (lt->c_cc[cc] != 0) - dt->c_cc[cc] = tp->t_cc[cc]; - if (lt->c_ispeed != 0) - dt->c_ispeed = tp->t_ispeed; - if (lt->c_ospeed != 0) - dt->c_ospeed = tp->t_ospeed; - } - error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, td); - if (error != ENOIOCTL) - return (error); - s = spltty(); - error = ttioctl(tp, cmd, data, flag); - disc_optim(tp, &tp->t_termios, com); - if (error != ENOIOCTL) { - splx(s); - return (error); - } - switch (cmd) { - case TIOCSBRK: - sio_setreg(com, com_cfcr, com->cfcr_image |= CFCR_SBREAK); - break; - case TIOCCBRK: - sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); - break; - case TIOCSDTR: - (void)commctl(com, TIOCM_DTR, DMBIS); - break; - case TIOCCDTR: - (void)commctl(com, TIOCM_DTR, DMBIC); - break; - /* - * XXX should disallow changing MCR_RTS if CS_RTS_IFLOW is set. The - * changes get undone on the next call to comparam(). - */ - case TIOCMSET: - (void)commctl(com, *(int *)data, DMSET); - break; - case TIOCMBIS: - (void)commctl(com, *(int *)data, DMBIS); - break; - case TIOCMBIC: - (void)commctl(com, *(int *)data, DMBIC); - break; - case TIOCMGET: - *(int *)data = commctl(com, 0, DMGET); - break; - case TIOCMSDTRWAIT: - /* must be root since the wait applies to following logins */ - error = suser_td(td); - if (error != 0) { - splx(s); - return (error); - } - com->dtr_wait = *(int *)data * hz / 100; - break; - case TIOCMGDTRWAIT: - *(int *)data = com->dtr_wait * 100 / hz; - break; - case TIOCTIMESTAMP: - com->do_timestamp = TRUE; - *(struct timeval *)data = com->timestamp; - break; - case TIOCDCDTIMESTAMP: - com->do_dcd_timestamp = TRUE; - *(struct timeval *)data = com->dcd_timestamp; - break; - default: - splx(s); - error = pps_ioctl(cmd, data, &com->pps); - if (error == ENODEV) - error = ENOTTY; - return (error); - } - splx(s); - return (0); -} - -/* software interrupt handler for SWI_TTY */ -static void -siopoll(void *dummy) -{ - int unit; - - if (com_events == 0) - return; -repeat: - for (unit = 0; unit < sio_numunits; ++unit) { - struct com_s *com; - int incc; - struct tty *tp; - - com = com_addr(unit); - if (com == NULL) - continue; - tp = com->tp; - if (tp == NULL || com->gone) { - /* - * Discard any events related to never-opened or - * going-away devices. - */ - mtx_lock_spin(&sio_lock); - incc = com->iptr - com->ibuf; - com->iptr = com->ibuf; - if (com->state & CS_CHECKMSR) { - incc += LOTS_OF_EVENTS; - com->state &= ~CS_CHECKMSR; - } - com_events -= incc; - mtx_unlock_spin(&sio_lock); - continue; - } - if (com->iptr != com->ibuf) { - mtx_lock_spin(&sio_lock); - sioinput(com); - mtx_unlock_spin(&sio_lock); - } - if (com->state & CS_CHECKMSR) { - u_char delta_modem_status; - - mtx_lock_spin(&sio_lock); - delta_modem_status = com->last_modem_status - ^ com->prev_modem_status; - com->prev_modem_status = com->last_modem_status; - com_events -= LOTS_OF_EVENTS; - com->state &= ~CS_CHECKMSR; - mtx_unlock_spin(&sio_lock); - if (delta_modem_status & MSR_DCD) - (*linesw[tp->t_line].l_modem) - (tp, com->prev_modem_status & MSR_DCD); - } - if (com->state & CS_ODONE) { - mtx_lock_spin(&sio_lock); - com_events -= LOTS_OF_EVENTS; - com->state &= ~CS_ODONE; - mtx_unlock_spin(&sio_lock); - if (!(com->state & CS_BUSY) - && !(com->extra_state & CSE_BUSYCHECK)) { - timeout(siobusycheck, com, hz / 100); - com->extra_state |= CSE_BUSYCHECK; - } - (*linesw[tp->t_line].l_start)(tp); - } - if (com_events == 0) - break; - } - if (com_events >= LOTS_OF_EVENTS) - goto repeat; -} - -static int -comparam(tp, t) - struct tty *tp; - struct termios *t; -{ - u_int cfcr; - int cflag; - struct com_s *com; - int divisor; - u_char dlbh; - u_char dlbl; - int s; - int unit; - - /* do historical conversions */ - if (t->c_ispeed == 0) - t->c_ispeed = t->c_ospeed; - - /* check requested parameters */ - divisor = ttspeedtab(t->c_ospeed, comspeedtab); - if (divisor < 0 || (divisor > 0 && t->c_ispeed != t->c_ospeed)) - return (EINVAL); - - /* parameters are OK, convert them to the com struct and the device */ - unit = DEV_TO_UNIT(tp->t_dev); - com = com_addr(unit); - if (com == NULL) - return (ENODEV); - s = spltty(); - if (divisor == 0) - (void)commctl(com, TIOCM_DTR, DMBIC); /* hang up line */ - else - (void)commctl(com, TIOCM_DTR, DMBIS); - cflag = t->c_cflag; - switch (cflag & CSIZE) { - case CS5: - cfcr = CFCR_5BITS; - break; - case CS6: - cfcr = CFCR_6BITS; - break; - case CS7: - cfcr = CFCR_7BITS; - break; - default: - cfcr = CFCR_8BITS; - break; - } - if (cflag & PARENB) { - cfcr |= CFCR_PENAB; - if (!(cflag & PARODD)) - cfcr |= CFCR_PEVEN; - } - if (cflag & CSTOPB) - cfcr |= CFCR_STOPB; - - if (com->hasfifo && divisor != 0) { - /* - * Use a fifo trigger level low enough so that the input - * latency from the fifo is less than about 16 msec and - * the total latency is less than about 30 msec. These - * latencies are reasonable for humans. Serial comms - * protocols shouldn't expect anything better since modem - * latencies are larger. - */ - com->fifo_image = t->c_ospeed <= 4800 - ? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_HIGH; -#ifdef COM_ESP - /* - * The Hayes ESP card needs the fifo DMA mode bit set - * in compatibility mode. If not, it will interrupt - * for each character received. - */ - if (com->esp) - com->fifo_image |= FIFO_DMA_MODE; -#endif - sio_setreg(com, com_fifo, com->fifo_image); - } - - /* - * This returns with interrupts disabled so that we can complete - * the speed change atomically. Keeping interrupts disabled is - * especially important while com_data is hidden. - */ - (void) siosetwater(com, t->c_ispeed); - - if (divisor != 0) { - sio_setreg(com, com_cfcr, cfcr | CFCR_DLAB); - /* - * Only set the divisor registers if they would change, - * since on some 16550 incompatibles (UMC8669F), setting - * them while input is arriving them loses sync until - * data stops arriving. - */ - dlbl = divisor & 0xFF; - if (sio_getreg(com, com_dlbl) != dlbl) - sio_setreg(com, com_dlbl, dlbl); - dlbh = (u_int) divisor >> 8; - if (sio_getreg(com, com_dlbh) != dlbh) - sio_setreg(com, com_dlbh, dlbh); - } - - sio_setreg(com, com_cfcr, com->cfcr_image = cfcr); - - if (!(tp->t_state & TS_TTSTOP)) - com->state |= CS_TTGO; - - if (cflag & CRTS_IFLOW) { - if (com->st16650a) { - sio_setreg(com, com_cfcr, 0xbf); - sio_setreg(com, com_fifo, - sio_getreg(com, com_fifo) | 0x40); - } - com->state |= CS_RTS_IFLOW; - /* - * If CS_RTS_IFLOW just changed from off to on, the change - * needs to be propagated to MCR_RTS. This isn't urgent, - * so do it later by calling comstart() instead of repeating - * a lot of code from comstart() here. - */ - } else if (com->state & CS_RTS_IFLOW) { - com->state &= ~CS_RTS_IFLOW; - /* - * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS - * on here, since comstart() won't do it later. - */ - outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); - if (com->st16650a) { - sio_setreg(com, com_cfcr, 0xbf); - sio_setreg(com, com_fifo, - sio_getreg(com, com_fifo) & ~0x40); - } - } - - - /* - * Set up state to handle output flow control. - * XXX - worth handling MDMBUF (DCD) flow control at the lowest level? - * Now has 10+ msec latency, while CTS flow has 50- usec latency. - */ - com->state |= CS_ODEVREADY; - com->state &= ~CS_CTS_OFLOW; - if (cflag & CCTS_OFLOW) { - com->state |= CS_CTS_OFLOW; - if (!(com->last_modem_status & MSR_CTS)) - com->state &= ~CS_ODEVREADY; - if (com->st16650a) { - sio_setreg(com, com_cfcr, 0xbf); - sio_setreg(com, com_fifo, - sio_getreg(com, com_fifo) | 0x80); - } - } else { - if (com->st16650a) { - sio_setreg(com, com_cfcr, 0xbf); - sio_setreg(com, com_fifo, - sio_getreg(com, com_fifo) & ~0x80); - } - } - - sio_setreg(com, com_cfcr, com->cfcr_image); - - /* XXX shouldn't call functions while intrs are disabled. */ - disc_optim(tp, t, com); - /* - * Recover from fiddling with CS_TTGO. We used to call siointr1() - * unconditionally, but that defeated the careful discarding of - * stale input in sioopen(). - */ - if (com->state >= (CS_BUSY | CS_TTGO)) - siointr1(com); - - mtx_unlock_spin(&sio_lock); - splx(s); - comstart(tp); - if (com->ibufold != NULL) { - free(com->ibufold, M_DEVBUF); - com->ibufold = NULL; - } - return (0); -} - -/* - * This function must be called with the sio_lock mutex released and will - * return with it obtained. - */ -static int -siosetwater(com, speed) - struct com_s *com; - speed_t speed; -{ - int cp4ticks; - u_char *ibuf; - int ibufsize; - struct tty *tp; - - /* - * Make the buffer size large enough to handle a softtty interrupt - * latency of about 2 ticks without loss of throughput or data - * (about 3 ticks if input flow control is not used or not honoured, - * but a bit less for CS5-CS7 modes). - */ - cp4ticks = speed / 10 / hz * 4; - for (ibufsize = 128; ibufsize < cp4ticks;) - ibufsize <<= 1; - if (ibufsize == com->ibufsize) { - mtx_lock_spin(&sio_lock); - return (0); - } - - /* - * Allocate input buffer. The extra factor of 2 in the size is - * to allow for an error byte for each input byte. - */ - ibuf = malloc(2 * ibufsize, M_DEVBUF, M_NOWAIT); - if (ibuf == NULL) { - mtx_lock_spin(&sio_lock); - return (ENOMEM); - } - - /* Initialize non-critical variables. */ - com->ibufold = com->ibuf; - com->ibufsize = ibufsize; - tp = com->tp; - if (tp != NULL) { - tp->t_ififosize = 2 * ibufsize; - tp->t_ispeedwat = (speed_t)-1; - tp->t_ospeedwat = (speed_t)-1; - } - - /* - * Read current input buffer, if any. Continue with interrupts - * disabled. - */ - mtx_lock_spin(&sio_lock); - if (com->iptr != com->ibuf) - sioinput(com); - - /*- - * Initialize critical variables, including input buffer watermarks. - * The external device is asked to stop sending when the buffer - * exactly reaches high water, or when the high level requests it. - * The high level is notified immediately (rather than at a later - * clock tick) when this watermark is reached. - * The buffer size is chosen so the watermark should almost never - * be reached. - * The low watermark is invisibly 0 since the buffer is always - * emptied all at once. - */ - com->iptr = com->ibuf = ibuf; - com->ibufend = ibuf + ibufsize; - com->ierroff = ibufsize; - com->ihighwater = ibuf + 3 * ibufsize / 4; - return (0); -} - -static void -comstart(tp) - struct tty *tp; -{ - struct com_s *com; - int s; - int unit; - - unit = DEV_TO_UNIT(tp->t_dev); - com = com_addr(unit); - if (com == NULL) - return; - s = spltty(); - mtx_lock_spin(&sio_lock); - if (tp->t_state & TS_TTSTOP) - com->state &= ~CS_TTGO; - else - com->state |= CS_TTGO; - if (tp->t_state & TS_TBLOCK) { - if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW) - outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); - } else { - if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater - && com->state & CS_RTS_IFLOW) - outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); - } - mtx_unlock_spin(&sio_lock); - if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { - ttwwakeup(tp); - splx(s); - return; - } - if (tp->t_outq.c_cc != 0) { - struct lbq *qp; - struct lbq *next; - - if (!com->obufs[0].l_queued) { - com->obufs[0].l_tail - = com->obuf1 + q_to_b(&tp->t_outq, com->obuf1, - sizeof com->obuf1); - com->obufs[0].l_next = NULL; - com->obufs[0].l_queued = TRUE; - mtx_lock_spin(&sio_lock); - if (com->state & CS_BUSY) { - qp = com->obufq.l_next; - while ((next = qp->l_next) != NULL) - qp = next; - qp->l_next = &com->obufs[0]; - } else { - com->obufq.l_head = com->obufs[0].l_head; - com->obufq.l_tail = com->obufs[0].l_tail; - com->obufq.l_next = &com->obufs[0]; - com->state |= CS_BUSY; - } - mtx_unlock_spin(&sio_lock); - } - if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) { - com->obufs[1].l_tail - = com->obuf2 + q_to_b(&tp->t_outq, com->obuf2, - sizeof com->obuf2); - com->obufs[1].l_next = NULL; - com->obufs[1].l_queued = TRUE; - mtx_lock_spin(&sio_lock); - if (com->state & CS_BUSY) { - qp = com->obufq.l_next; - while ((next = qp->l_next) != NULL) - qp = next; - qp->l_next = &com->obufs[1]; - } else { - com->obufq.l_head = com->obufs[1].l_head; - com->obufq.l_tail = com->obufs[1].l_tail; - com->obufq.l_next = &com->obufs[1]; - com->state |= CS_BUSY; - } - mtx_unlock_spin(&sio_lock); - } - tp->t_state |= TS_BUSY; - } - mtx_lock_spin(&sio_lock); - if (com->state >= (CS_BUSY | CS_TTGO)) - siointr1(com); /* fake interrupt to start output */ - mtx_unlock_spin(&sio_lock); - ttwwakeup(tp); - splx(s); -} - -static void -comstop(tp, rw) - struct tty *tp; - int rw; -{ - struct com_s *com; - - com = com_addr(DEV_TO_UNIT(tp->t_dev)); - if (com == NULL || com->gone) - return; - mtx_lock_spin(&sio_lock); - if (rw & FWRITE) { - if (com->hasfifo) -#ifdef COM_ESP - /* XXX avoid h/w bug. */ - if (!com->esp) -#endif - sio_setreg(com, com_fifo, - FIFO_XMT_RST | com->fifo_image); - com->obufs[0].l_queued = FALSE; - com->obufs[1].l_queued = FALSE; - if (com->state & CS_ODONE) - com_events -= LOTS_OF_EVENTS; - com->state &= ~(CS_ODONE | CS_BUSY); - com->tp->t_state &= ~TS_BUSY; - } - if (rw & FREAD) { - if (com->hasfifo) -#ifdef COM_ESP - /* XXX avoid h/w bug. */ - if (!com->esp) -#endif - sio_setreg(com, com_fifo, - FIFO_RCV_RST | com->fifo_image); - com_events -= (com->iptr - com->ibuf); - com->iptr = com->ibuf; - } - mtx_unlock_spin(&sio_lock); - comstart(tp); -} - -static int -commctl(com, bits, how) - struct com_s *com; - int bits; - int how; -{ - int mcr; - int msr; - - if (how == DMGET) { - bits = TIOCM_LE; /* XXX - always enabled while open */ - mcr = com->mcr_image; - if (mcr & MCR_DTR) - bits |= TIOCM_DTR; - if (mcr & MCR_RTS) - bits |= TIOCM_RTS; - msr = com->prev_modem_status; - if (msr & MSR_CTS) - bits |= TIOCM_CTS; - if (msr & MSR_DCD) - bits |= TIOCM_CD; - if (msr & MSR_DSR) - bits |= TIOCM_DSR; - /* - * XXX - MSR_RI is naturally volatile, and we make MSR_TERI - * more volatile by reading the modem status a lot. Perhaps - * we should latch both bits until the status is read here. - */ - if (msr & (MSR_RI | MSR_TERI)) - bits |= TIOCM_RI; - return (bits); - } - mcr = 0; - if (bits & TIOCM_DTR) - mcr |= MCR_DTR; - if (bits & TIOCM_RTS) - mcr |= MCR_RTS; - if (com->gone) - return(0); - mtx_lock_spin(&sio_lock); - switch (how) { - case DMSET: - outb(com->modem_ctl_port, - com->mcr_image = mcr | (com->mcr_image & MCR_IENABLE)); - break; - case DMBIS: - outb(com->modem_ctl_port, com->mcr_image |= mcr); - break; - case DMBIC: - outb(com->modem_ctl_port, com->mcr_image &= ~mcr); - break; - } - mtx_unlock_spin(&sio_lock); - return (0); -} - -static void -siosettimeout() -{ - struct com_s *com; - bool_t someopen; - int unit; - - /* - * Set our timeout period to 1 second if no polled devices are open. - * Otherwise set it to max(1/200, 1/hz). - * Enable timeouts iff some device is open. - */ - untimeout(comwakeup, (void *)NULL, sio_timeout_handle); - sio_timeout = hz; - someopen = FALSE; - for (unit = 0; unit < sio_numunits; ++unit) { - com = com_addr(unit); - if (com != NULL && com->tp != NULL - && com->tp->t_state & TS_ISOPEN && !com->gone) { - someopen = TRUE; - if (com->poll || com->poll_output) { - sio_timeout = hz > 200 ? hz / 200 : 1; - break; - } - } - } - if (someopen) { - sio_timeouts_until_log = hz / sio_timeout; - sio_timeout_handle = timeout(comwakeup, (void *)NULL, - sio_timeout); - } else { - /* Flush error messages, if any. */ - sio_timeouts_until_log = 1; - comwakeup((void *)NULL); - untimeout(comwakeup, (void *)NULL, sio_timeout_handle); - } -} - -static void -comwakeup(chan) - void *chan; -{ - struct com_s *com; - int unit; - - sio_timeout_handle = timeout(comwakeup, (void *)NULL, sio_timeout); - - /* - * Recover from lost output interrupts. - * Poll any lines that don't use interrupts. - */ - for (unit = 0; unit < sio_numunits; ++unit) { - com = com_addr(unit); - if (com != NULL && !com->gone - && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) { - mtx_lock_spin(&sio_lock); - siointr1(com); - mtx_unlock_spin(&sio_lock); - } - } - - /* - * Check for and log errors, but not too often. - */ - if (--sio_timeouts_until_log > 0) - return; - sio_timeouts_until_log = hz / sio_timeout; - for (unit = 0; unit < sio_numunits; ++unit) { - int errnum; - - com = com_addr(unit); - if (com == NULL) - continue; - if (com->gone) - continue; - for (errnum = 0; errnum < CE_NTYPES; ++errnum) { - u_int delta; - u_long total; - - mtx_lock_spin(&sio_lock); - delta = com->delta_error_counts[errnum]; - com->delta_error_counts[errnum] = 0; - mtx_unlock_spin(&sio_lock); - if (delta == 0) - continue; - total = com->error_counts[errnum] += delta; - log(LOG_ERR, "sio%d: %u more %s%s (total %lu)\n", - unit, delta, error_desc[errnum], - delta == 1 ? "" : "s", total); - } - } -} - -static void -disc_optim(tp, t, com) - struct tty *tp; - struct termios *t; - struct com_s *com; -{ - if (!(t->c_iflag & (ICRNL | IGNCR | IMAXBEL | INLCR | ISTRIP | IXON)) - && (!(t->c_iflag & BRKINT) || (t->c_iflag & IGNBRK)) - && (!(t->c_iflag & PARMRK) - || (t->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK)) - && !(t->c_lflag & (ECHO | ICANON | IEXTEN | ISIG | PENDIN)) - && linesw[tp->t_line].l_rint == ttyinput) - tp->t_state |= TS_CAN_BYPASS_L_RINT; - else - tp->t_state &= ~TS_CAN_BYPASS_L_RINT; - com->hotchar = linesw[tp->t_line].l_hotchar; -} - -/* - * Following are all routines needed for SIO to act as console - */ -#include <sys/cons.h> - -struct siocnstate { - u_char dlbl; - u_char dlbh; - u_char ier; - u_char cfcr; - u_char mcr; -}; - -#ifndef __alpha__ -static speed_t siocngetspeed __P((Port_t, struct speedtab *)); -#endif -static void siocnclose __P((struct siocnstate *sp, Port_t iobase)); -static void siocnopen __P((struct siocnstate *sp, Port_t iobase, int speed)); -static void siocntxwait __P((Port_t iobase)); - -#ifdef __alpha__ -int siocnattach __P((int port, int speed)); -int siogdbattach __P((int port, int speed)); -int siogdbgetc __P((void)); -void siogdbputc __P((int c)); -#else -static cn_probe_t siocnprobe; -static cn_init_t siocninit; -#endif -static cn_checkc_t siocncheckc; -static cn_getc_t siocngetc; -static cn_putc_t siocnputc; - -#ifndef __alpha__ -CONS_DRIVER(sio, siocnprobe, siocninit, NULL, siocngetc, siocncheckc, - siocnputc, NULL); -#endif - -/* To get the GDB related variables */ -#if DDB > 0 -#include <ddb/ddb.h> -#endif - -static void -siocntxwait(iobase) - Port_t iobase; -{ - int timo; - - /* - * Wait for any pending transmission to finish. Required to avoid - * the UART lockup bug when the speed is changed, and for normal - * transmits. - */ - timo = 100000; - while ((inb(iobase + com_lsr) & (LSR_TSRE | LSR_TXRDY)) - != (LSR_TSRE | LSR_TXRDY) && --timo != 0) - ; -} - -#ifndef __alpha__ - -/* - * Read the serial port specified and try to figure out what speed - * it's currently running at. We're assuming the serial port has - * been initialized and is basicly idle. This routine is only intended - * to be run at system startup. - * - * If the value read from the serial port doesn't make sense, return 0. - */ - -static speed_t -siocngetspeed(iobase, table) - Port_t iobase; - struct speedtab *table; -{ - int code; - u_char dlbh; - u_char dlbl; - u_char cfcr; - - cfcr = inb(iobase + com_cfcr); - outb(iobase + com_cfcr, CFCR_DLAB | cfcr); - - dlbl = inb(iobase + com_dlbl); - dlbh = inb(iobase + com_dlbh); - - outb(iobase + com_cfcr, cfcr); - - code = dlbh << 8 | dlbl; - - for (; table->sp_speed != -1; table++) - if (table->sp_code == code) - return (table->sp_speed); - - return (0); /* didn't match anything sane */ -} - -#endif - -static void -siocnopen(sp, iobase, speed) - struct siocnstate *sp; - Port_t iobase; - int speed; -{ - int divisor; - u_char dlbh; - u_char dlbl; - - /* - * Save all the device control registers except the fifo register - * and set our default ones (cs8 -parenb speed=comdefaultrate). - * We can't save the fifo register since it is read-only. - */ - sp->ier = inb(iobase + com_ier); - outb(iobase + com_ier, 0); /* spltty() doesn't stop siointr() */ - siocntxwait(iobase); - sp->cfcr = inb(iobase + com_cfcr); - outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); - sp->dlbl = inb(iobase + com_dlbl); - sp->dlbh = inb(iobase + com_dlbh); - /* - * Only set the divisor registers if they would change, since on - * some 16550 incompatibles (Startech), setting them clears the - * data input register. This also reduces the effects of the - * UMC8669F bug. - */ - divisor = ttspeedtab(speed, comspeedtab); - dlbl = divisor & 0xFF; - if (sp->dlbl != dlbl) - outb(iobase + com_dlbl, dlbl); - dlbh = (u_int) divisor >> 8; - if (sp->dlbh != dlbh) - outb(iobase + com_dlbh, dlbh); - outb(iobase + com_cfcr, CFCR_8BITS); - sp->mcr = inb(iobase + com_mcr); - /* - * We don't want interrupts, but must be careful not to "disable" - * them by clearing the MCR_IENABLE bit, since that might cause - * an interrupt by floating the IRQ line. - */ - outb(iobase + com_mcr, (sp->mcr & MCR_IENABLE) | MCR_DTR | MCR_RTS); -} - -static void -siocnclose(sp, iobase) - struct siocnstate *sp; - Port_t iobase; -{ - /* - * Restore the device control registers. - */ - siocntxwait(iobase); - outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); - if (sp->dlbl != inb(iobase + com_dlbl)) - outb(iobase + com_dlbl, sp->dlbl); - if (sp->dlbh != inb(iobase + com_dlbh)) - outb(iobase + com_dlbh, sp->dlbh); - outb(iobase + com_cfcr, sp->cfcr); - /* - * XXX damp oscillations of MCR_DTR and MCR_RTS by not restoring them. - */ - outb(iobase + com_mcr, sp->mcr | MCR_DTR | MCR_RTS); - outb(iobase + com_ier, sp->ier); -} - -#ifndef __alpha__ - -static void -siocnprobe(cp) - struct consdev *cp; -{ - speed_t boot_speed; - u_char cfcr; - int s, unit; - struct siocnstate sp; - - /* - * Find our first enabled console, if any. If it is a high-level - * console device, then initialize it and return successfully. - * If it is a low-level console device, then initialize it and - * return unsuccessfully. It must be initialized in both cases - * for early use by console drivers and debuggers. Initializing - * the hardware is not necessary in all cases, since the i/o - * routines initialize it on the fly, but it is necessary if - * input might arrive while the hardware is switched back to an - * uninitialized state. We can't handle multiple console devices - * yet because our low-level routines don't take a device arg. - * We trust the user to set the console flags properly so that we - * don't need to probe. - */ - cp->cn_pri = CN_DEAD; - - for (unit = 0; unit < 16; unit++) { /* XXX need to know how many */ - int flags; - int disabled; - if (resource_int_value("sio", unit, "disabled", &disabled) == 0) { - if (disabled) - continue; - } - if (resource_int_value("sio", unit, "flags", &flags)) - continue; - if (COM_CONSOLE(flags) || COM_DEBUGGER(flags)) { - int port; - Port_t iobase; - - if (resource_int_value("sio", unit, "port", &port)) - continue; - iobase = port; - s = spltty(); - if (boothowto & RB_SERIAL) { - boot_speed = siocngetspeed(iobase, comspeedtab); - if (boot_speed) - comdefaultrate = boot_speed; - } - - /* - * Initialize the divisor latch. We can't rely on - * siocnopen() to do this the first time, since it - * avoids writing to the latch if the latch appears - * to have the correct value. Also, if we didn't - * just read the speed from the hardware, then we - * need to set the speed in hardware so that - * switching it later is null. - */ - cfcr = inb(iobase + com_cfcr); - outb(iobase + com_cfcr, CFCR_DLAB | cfcr); - outb(iobase + com_dlbl, - COMBRD(comdefaultrate) & 0xff); - outb(iobase + com_dlbh, - (u_int) COMBRD(comdefaultrate) >> 8); - outb(iobase + com_cfcr, cfcr); - - siocnopen(&sp, iobase, comdefaultrate); - - splx(s); - if (COM_CONSOLE(flags) && !COM_LLCONSOLE(flags)) { - cp->cn_dev = makedev(CDEV_MAJOR, unit); - cp->cn_pri = COM_FORCECONSOLE(flags) - || boothowto & RB_SERIAL - ? CN_REMOTE : CN_NORMAL; - siocniobase = iobase; - siocnunit = unit; - } - if (COM_DEBUGGER(flags)) { - printf("sio%d: gdb debugging port\n", unit); - siogdbiobase = iobase; - siogdbunit = unit; -#if DDB > 0 - gdbdev = makedev(CDEV_MAJOR, unit); - gdb_getc = siocngetc; - gdb_putc = siocnputc; -#endif - } - } - } -#ifdef __i386__ -#if DDB > 0 - /* - * XXX Ugly Compatability. - * If no gdb port has been specified, set it to be the console - * as some configuration files don't specify the gdb port. - */ - if (gdbdev == NODEV && (boothowto & RB_GDB)) { - printf("Warning: no GDB port specified. Defaulting to sio%d.\n", - siocnunit); - printf("Set flag 0x80 on desired GDB port in your\n"); - printf("configuration file (currently sio only).\n"); - siogdbiobase = siocniobase; - siogdbunit = siocnunit; - gdbdev = makedev(CDEV_MAJOR, siocnunit); - gdb_getc = siocngetc; - gdb_putc = siocnputc; - } -#endif -#endif -} - -static void -siocninit(cp) - struct consdev *cp; -{ - comconsole = DEV_TO_UNIT(cp->cn_dev); -} - -#endif - -#ifdef __alpha__ - -CONS_DRIVER(sio, NULL, NULL, NULL, siocngetc, siocncheckc, siocnputc, NULL); - -int -siocnattach(port, speed) - int port; - int speed; -{ - int s; - u_char cfcr; - struct siocnstate sp; - - siocniobase = port; - comdefaultrate = speed; - sio_consdev.cn_pri = CN_NORMAL; - sio_consdev.cn_dev = makedev(CDEV_MAJOR, 0); - - s = spltty(); - - /* - * Initialize the divisor latch. We can't rely on - * siocnopen() to do this the first time, since it - * avoids writing to the latch if the latch appears - * to have the correct value. Also, if we didn't - * just read the speed from the hardware, then we - * need to set the speed in hardware so that - * switching it later is null. - */ - cfcr = inb(siocniobase + com_cfcr); - outb(siocniobase + com_cfcr, CFCR_DLAB | cfcr); - outb(siocniobase + com_dlbl, - COMBRD(comdefaultrate) & 0xff); - outb(siocniobase + com_dlbh, - (u_int) COMBRD(comdefaultrate) >> 8); - outb(siocniobase + com_cfcr, cfcr); - - siocnopen(&sp, siocniobase, comdefaultrate); - splx(s); - - cn_tab = &sio_consdev; - return (0); -} - -int -siogdbattach(port, speed) - int port; - int speed; -{ - int s; - u_char cfcr; - struct siocnstate sp; - int unit = 1; /* XXX !!! */ - - siogdbiobase = port; - gdbdefaultrate = speed; - - printf("sio%d: gdb debugging port\n", unit); - siogdbunit = unit; -#if DDB > 0 - gdbdev = makedev(CDEV_MAJOR, unit); - gdb_getc = siocngetc; - gdb_putc = siocnputc; -#endif - - s = spltty(); - - /* - * Initialize the divisor latch. We can't rely on - * siocnopen() to do this the first time, since it - * avoids writing to the latch if the latch appears - * to have the correct value. Also, if we didn't - * just read the speed from the hardware, then we - * need to set the speed in hardware so that - * switching it later is null. - */ - cfcr = inb(siogdbiobase + com_cfcr); - outb(siogdbiobase + com_cfcr, CFCR_DLAB | cfcr); - outb(siogdbiobase + com_dlbl, - COMBRD(gdbdefaultrate) & 0xff); - outb(siogdbiobase + com_dlbh, - (u_int) COMBRD(gdbdefaultrate) >> 8); - outb(siogdbiobase + com_cfcr, cfcr); - - siocnopen(&sp, siogdbiobase, gdbdefaultrate); - splx(s); - - return (0); -} - -#endif - -static int -siocncheckc(dev) - dev_t dev; -{ - int c; - Port_t iobase; - int s; - struct siocnstate sp; - - if (minor(dev) == siogdbunit) - iobase = siogdbiobase; - else - iobase = siocniobase; - s = spltty(); - siocnopen(&sp, iobase, comdefaultrate); - if (inb(iobase + com_lsr) & LSR_RXRDY) - c = inb(iobase + com_data); - else - c = -1; - siocnclose(&sp, iobase); - splx(s); - return (c); -} - - -int -siocngetc(dev) - dev_t dev; -{ - int c; - Port_t iobase; - int s; - struct siocnstate sp; - - if (minor(dev) == siogdbunit) - iobase = siogdbiobase; - else - iobase = siocniobase; - s = spltty(); - siocnopen(&sp, iobase, comdefaultrate); - while (!(inb(iobase + com_lsr) & LSR_RXRDY)) - ; - c = inb(iobase + com_data); - siocnclose(&sp, iobase); - splx(s); - return (c); -} - -void -siocnputc(dev, c) - dev_t dev; - int c; -{ - int s; - struct siocnstate sp; - Port_t iobase; - - if (minor(dev) == siogdbunit) - iobase = siogdbiobase; - else - iobase = siocniobase; - s = spltty(); - if (sio_inited) - mtx_lock_spin(&sio_lock); - siocnopen(&sp, iobase, comdefaultrate); - siocntxwait(iobase); - outb(iobase + com_data, c); - siocnclose(&sp, iobase); - if (sio_inited) - mtx_unlock_spin(&sio_lock); - splx(s); -} - -#ifdef __alpha__ -int -siogdbgetc() -{ - int c; - Port_t iobase; - int s; - struct siocnstate sp; - - iobase = siogdbiobase; - s = spltty(); - siocnopen(&sp, iobase, gdbdefaultrate); - while (!(inb(iobase + com_lsr) & LSR_RXRDY)) - ; - c = inb(iobase + com_data); - siocnclose(&sp, iobase); - splx(s); - return (c); -} - -void -siogdbputc(c) - int c; -{ - int s; - struct siocnstate sp; - - s = spltty(); - siocnopen(&sp, siogdbiobase, gdbdefaultrate); - siocntxwait(siogdbiobase); - outb(siogdbiobase + com_data, c); - siocnclose(&sp, siogdbiobase); - splx(s); -} -#endif - -DRIVER_MODULE(sio, isa, sio_isa_driver, sio_devclass, 0, 0); -DRIVER_MODULE(sio, acpi, sio_isa_driver, sio_devclass, 0, 0); -#if NCARD > 0 -DRIVER_MODULE(sio, pccard, sio_pccard_driver, sio_devclass, 0, 0); -#endif -#if NPCI > 0 -DRIVER_MODULE(sio, pci, sio_pci_driver, sio_devclass, 0, 0); -DRIVER_MODULE(sio, cardbus, sio_pci_driver, sio_devclass, 0, 0); -#endif |
