Index: cvs2svn/branches/WHISTLE_SIO_RFC/sys/i386/isa/sio.c =================================================================== --- cvs2svn/branches/WHISTLE_SIO_RFC/sys/i386/isa/sio.c (nonexistent) +++ cvs2svn/branches/WHISTLE_SIO_RFC/sys/i386/isa/sio.c (revision 25714) @@ -0,0 +1,2693 @@ +/*- + * 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. + * + * from: @(#)com.c 7.5 (Berkeley) 5/16/91 + * $Id: sio.c,v 1.147.2.7 1997/02/01 16:19:05 bde Exp $ + */ + +#include "opt_comconsole.h" +#include "opt_ddb.h" +#include "opt_sio.h" +#include "sio.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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#ifdef DEVFS +#include +#endif + +#include + +#include +#include +#include + +#ifdef COM_ESP +#include +#endif +#include + +#include "crd.h" +#if NCRD > 0 +#include +#include +#include +#endif + +#define LOTS_OF_EVENTS 64 /* helps separate urgent events from input */ +#define RB_I_HIGH_WATER (TTYHOG - 2 * RS_IBUFSIZE) +#define RS_IBUFSIZE 256 + +#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(dev) ((dev)->id_flags & 0x01) +#define COM_MPMASTER(dev) (((dev)->id_flags >> 8) & 0x0ff) +#define COM_NOTAST4(dev) ((dev)->id_flags & 0x04) +#endif /* COM_MULTIPORT */ + +#define COM_LOSESOUTINTS(dev) ((dev)->id_flags & 0x08) +#define COM_NOFIFO(dev) ((dev)->id_flags & 0x02) +#define COM_VERBOSE(dev) ((dev)->id_flags & 0x80) + +#define com_scr 7 /* scratch register for 16450-16550 (R/W) */ + +/* + * 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. + */ +#define RS_IHIGHWATER (3 * RS_IBUFSIZE / 4) + +/* + * 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 + * siostop()) + * 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_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 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 *ihighwater; /* threshold in input buffer */ + u_char *iptr; /* next free spot in input buffer */ + + struct lbq obufq; /* head of queue of output buffers */ + struct lbq obufs[2]; /* output buffers */ + + Port_t data_port; /* i/o ports */ +#ifdef COM_ESP + Port_t esp_port; +#endif + Port_t int_id_port; + Port_t iobase; + Port_t modem_ctl_port; + Port_t line_status_port; + Port_t modem_status_port; + + 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; + + u_long bytes_in; /* statistics */ + u_long bytes_out; + u_int delta_error_counts[CE_NTYPES]; + u_long error_counts[CE_NTYPES]; + + /* + * Ping-pong input buffers. The extra factor of 2 in the sizes is + * to allow for an error byte for each input byte. + */ +#define CE_INPUT_OFFSET RS_IBUFSIZE + u_char ibuf1[2 * RS_IBUFSIZE]; + u_char ibuf2[2 * RS_IBUFSIZE]; + + /* + * 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 DEVFS + void *devfs_token_ttyd; + void *devfs_token_ttyl; + void *devfs_token_ttyi; + void *devfs_token_cuaa; + void *devfs_token_cual; + void *devfs_token_cuai; +#endif +}; + +/* + * XXX public functions in drivers should be declared in headers produced + * by `config', not here. + */ + +/* Interrupt handling entry point. */ +void siopoll __P((void)); + +/* Device switch entry points. */ +#define sioreset noreset +#define siommap nommap +#define siostrategy nostrategy + +#ifdef COM_ESP +static int espattach __P((struct isa_device *isdp, struct com_s *com, + Port_t esp_port)); +#endif +static int sioattach __P((struct isa_device *dev)); +static timeout_t siobusycheck; +static timeout_t siodtrwakeup; +static void comhardclose __P((struct com_s *com)); +static void siointr1 __P((struct com_s *com)); +static int commctl __P((struct com_s *com, int bits, int how)); +static int comparam __P((struct tty *tp, struct termios *t)); +static int sioprobe __P((struct isa_device *dev)); +static void siosettimeout __P((void)); +static void comstart __P((struct tty *tp)); +static timeout_t comwakeup; +static void disc_optim __P((struct tty *tp, struct termios *t, + struct com_s *com)); + +#ifdef DSI_SOFT_MODEM +static int LoadSoftModem __P((int unit,int base_io, u_long size, u_char *ptr)); +#endif /* DSI_SOFT_MODEM */ + +static char driver_name[] = "sio"; + +/* table and macro for fast conversion from a unit number to its com struct */ +static struct com_s *p_com_addr[NSIO]; +#define com_addr(unit) (p_com_addr[unit]) + +struct isa_driver siodriver = { + sioprobe, sioattach, driver_name +}; + +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; +static d_stop_t siostop; +static d_devtotty_t siodevtotty; + +#define CDEV_MAJOR 28 +static struct cdevsw sio_cdevsw = { + sioopen, sioclose, sioread, siowrite, + sioioctl, siostop, noreset, siodevtotty, + ttselect, nommap, NULL, driver_name, + NULL, -1, +}; + +static int comconsole = -1; +static speed_t comdefaultrate = CONSPEED; +static u_int com_events; /* input chars + weighted output completions */ +static int sio_timeout; +static int sio_timeouts_until_log; +#if 0 /* XXX */ +static struct tty *sio_tty[NSIO]; +#else +static struct tty sio_tty[NSIO]; +#endif +static const int nsio_tty = NSIO; + +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) }, + { 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 + +#if NCRD > 0 +/* + * PC-Card (PCMCIA) specific code. + */ +static int card_intr(struct pccard_dev *); /* Interrupt handler */ +static void siounload(struct pccard_dev *); /* Disable driver */ +static void siosuspend(struct pccard_dev *); /* Suspend driver */ +static int sioinit(struct pccard_dev *, int); /* init device */ + +static struct pccard_drv sio_info = { + driver_name, + card_intr, + siounload, + siosuspend, + sioinit, + 0, /* Attributes - presently unused */ + &tty_imask /* Interrupt mask for device */ + /* XXX - Should this also include net_imask? */ +}; + +/* + * Called when a power down is requested. Shuts down the + * device and configures the device as unavailable (but + * still loaded...). A resume is done by calling + * sioinit with first=0. This is called when the user suspends + * the system, or the APM code suspends the system. + */ +static void +siosuspend(struct pccard_dev *dp) +{ + printf("sio%d: suspending\n", dp->isahd.id_unit); +} + +/* + * Initialize the device - called from Slot manager. + * If first is set, then check for the device's existence + * before initializing it. Once initialized, the device table may + * be set up. + */ +int +sioinit(struct pccard_dev *dp, int first) +{ + + /* validate unit number. */ + if (first) { + if (dp->isahd.id_unit >= NSIO) + return(ENODEV); + /* Make sure it isn't already probed. */ + if (com_addr(dp->isahd.id_unit)) + return(EBUSY); + /* + * Probe the device. If a value is returned, the + * device was found at the location. + */ + if (sioprobe(&dp->isahd)==0) + return(ENXIO); + if (sioattach(&dp->isahd)==0) + return(ENXIO); + } + /* + * XXX TODO: + * If it was initialized before, the device structure + * should also be initialized. We should + * reset (and possibly restart) the hardware, but + * I am not sure of the best way to do this... + */ + return(0); +} + +/* + * siounload - 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 void +siounload(struct pccard_dev *dp) +{ + struct com_s *com; + + com = com_addr(dp->isahd.id_unit); + if (!com->iobase) { + printf("sio%d already unloaded!\n",dp->isahd.id_unit); + return; + } + if (com->tp && (com->tp->t_state & TS_ISOPEN)) { + com->gone = 1; + printf("sio%d: unload\n", dp->isahd.id_unit); + com->tp->t_gen++; + ttyclose(com->tp); + ttwakeup(com->tp); + ttwwakeup(com->tp); + } else { + com_addr(com->unit) = NULL; + bzero(com, sizeof *com); + free(com,M_TTYS); + printf("sio%d: unload,gone\n", dp->isahd.id_unit); + } +} + +/* + * card_intr - Shared interrupt called from + * front end of PC-Card handler. + */ +static int +card_intr(struct pccard_dev *dp) +{ + struct com_s *com; + com = com_addr(dp->isahd.id_unit); + if (com && !com_addr(dp->isahd.id_unit)->gone) + siointr1(com_addr(dp->isahd.id_unit)); + return(1); +} +#endif /* NCRD > 0 */ + +static int +sioprobe(dev) + struct isa_device *dev; +{ + static bool_t already_init; + bool_t failures[10]; + int fn; + struct isa_device *idev; + Port_t iobase; + u_char mcr_image; + int result; + struct isa_device *xdev; + + 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. + */ + for (xdev = isa_devtab_tty; xdev->id_driver != NULL; xdev++) + if (xdev->id_driver == &siodriver && xdev->id_enabled) + outb(xdev->id_iobase + com_mcr, 0); +#if NCRD > 0 + /* + * If PC-Card probe required, then register driver with + * slot manager. + */ + pccard_add_driver(&sio_info); +#endif + already_init = TRUE; + } + + /* + * 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(dev)) { + idev = find_isadev(isa_devtab_tty, &siodriver, + COM_MPMASTER(dev)); + if (idev == NULL) { + printf("sio%d: master device %d not configured\n", + dev->id_unit, COM_MPMASTER(dev)); + return (0); + } + if (!COM_NOTAST4(dev)) { + outb(idev->id_iobase + com_scr, + idev->id_irq ? 0x80 : 0); + mcr_image = 0; + } + } +#endif /* COM_MULTIPORT */ + if (idev->id_irq == 0) + mcr_image = 0; + + bzero(failures, sizeof failures); + iobase = dev->id_iobase; + + /* + * 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. + */ + disable_intr(); +/* 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. + */ + outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); + outb(iobase + com_dlbl, COMBRD(9600) & 0xff); + outb(iobase + com_dlbh, (u_int) COMBRD(9600) >> 8); + outb(iobase + com_cfcr, CFCR_8BITS); + DELAY((16 + 1) * 1000000 / (9600 / 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? */ + outb(iobase + com_mcr, mcr_image); + outb(iobase + com_ier, 0); + + /* + * Attempt to set loopback mode so that we can send a null byte + * without annoying any external device. + */ +/* EXTRA DELAY? */ + outb(iobase + 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. + */ + outb(iobase + 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. + */ + outb(iobase + com_data, 0); + DELAY((1 + 2) * 1000000 / (9600 / 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? */ + outb(iobase + com_mcr, mcr_image); + + /* + * 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] = inb(iobase + com_cfcr) - CFCR_8BITS; + failures[1] = inb(iobase + com_ier) - IER_ETXRDY; + failures[2] = inb(iobase + com_mcr) - mcr_image; + DELAY(10000); /* Some internal modems need this time */ + if (idev->id_irq != 0) + failures[3] = isa_irq_pending(idev) ? 0 : 1; + failures[4] = (inb(iobase + com_iir) & IIR_IMASK) - IIR_TXRDY; + DELAY(1000); /* XXX */ + if (idev->id_irq != 0) + failures[5] = isa_irq_pending(idev) ? 1 : 0; + failures[6] = (inb(iobase + 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 at) 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.) + */ + outb(iobase + com_ier, 0); + outb(iobase + com_cfcr, CFCR_8BITS); /* dummy to avoid bus echo */ + failures[7] = inb(iobase + com_ier); + DELAY(1000); /* XXX */ + if (idev->id_irq != 0) + failures[8] = isa_irq_pending(idev) ? 1 : 0; + failures[9] = (inb(iobase + com_iir) & IIR_IMASK) - IIR_NOPEND; + + enable_intr(); + + result = IO_COMSIZE; + for (fn = 0; fn < sizeof failures; ++fn) + if (failures[fn]) { + outb(iobase + com_mcr, 0); + result = 0; + if (COM_VERBOSE(dev)) + printf("sio%d: probe test %d failed\n", + dev->id_unit, fn); + } + return (result); +} + +#ifdef COM_ESP +static int +espattach(isdp, com, esp_port) + struct isa_device *isdp; + 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 (com->iobase == 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 +sioattach(isdp) + struct isa_device *isdp; +{ + struct com_s *com; + dev_t dev; +#ifdef COM_ESP + Port_t *espp; +#endif + Port_t iobase; + int s; + int unit; + + isdp->id_ri_flags |= RI_FAST; + iobase = isdp->id_iobase; + unit = isdp->id_unit; + com = malloc(sizeof *com, M_TTYS, M_NOWAIT); + if (com == NULL) + return (0); + + /* + * 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->cfcr_image = CFCR_8BITS; + com->dtr_wait = 3 * hz; + com->loses_outints = COM_LOSESOUTINTS(isdp) != 0; + com->no_irq = isdp->id_irq == 0; + com->tx_fifo_size = 1; + com->iptr = com->ibuf = com->ibuf1; + com->ibufend = com->ibuf1 + RS_IBUFSIZE; + com->ihighwater = com->ibuf1 + RS_IHIGHWATER; + com->obufs[0].l_head = com->obuf1; + com->obufs[1].l_head = com->obuf2; + + com->iobase = iobase; + 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; + + /* + * We don't use all the flags from 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->it_in.c_ispeed = com->it_in.c_ospeed = comdefaultrate; + } else + com->it_in.c_ispeed = com->it_in.c_ospeed = TTYDEF_SPEED; + termioschars(&com->it_in); + com->it_out = com->it_in; + + /* attempt to determine UART type */ + printf("sio%d: type", unit); + +#ifdef DSI_SOFT_MODEM + if((inb(iobase+7) ^ inb(iobase+7)) & 0x80) { + printf(" Digicom Systems, Inc. SoftModem"); + goto determined_type; + } +#endif /* DSI_SOFT_MODEM */ + +#ifdef COM_MULTIPORT + if (!COM_ISMULTIPORT(isdp)) +#endif + { + u_char scr; + u_char scr1; + u_char scr2; + + scr = inb(iobase + com_scr); + outb(iobase + com_scr, 0xa5); + scr1 = inb(iobase + com_scr); + outb(iobase + com_scr, 0x5a); + scr2 = inb(iobase + com_scr); + outb(iobase + com_scr, scr); + if (scr1 != 0xa5 || scr2 != 0x5a) { + printf(" 8250"); + goto determined_type; + } + } + outb(iobase + com_fifo, FIFO_ENABLE | FIFO_RX_HIGH); + DELAY(100); + 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: + printf(" 16550A"); + if (COM_NOFIFO(isdp)) { + printf(" fifo disabled"); + } else { + com->hasfifo = TRUE; + com->tx_fifo_size = 16; +#ifdef COM_ESP + for (espp = likely_esp_ports; *espp != 0; espp++) + if (espattach(isdp, com, *espp)) { + com->tx_fifo_size = 1024; + break; + } +#endif + } +#if 0 + /* + * Check for the Startech ST16C650 chip. + * it has a shadow register under the com_iir, + * which can only be accessed when cfcr == 0xff + */ + { + u_char i, j; + + i = inb(iobase + com_iir); + outb(iobase + com_cfcr, 0xff); + outb(iobase + com_iir, 0x0); + outb(iobase + com_cfcr, CFCR_8BITS); + j = inb(iobase + com_iir); + outb(iobase + com_iir, i); + if (i != j) { + printf(" 16550A"); + } else { + com->tx_fifo_size = 32; + printf(" 16650"); + } + if (!com->tx_fifo_size) + printf(" fifo disabled"); + } +#endif + 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 */ + outb(iobase + com_fifo, 0); +determined_type: ; + +#ifdef COM_MULTIPORT + if (COM_ISMULTIPORT(isdp)) { + com->multiport = TRUE; + printf(" (multiport"); + if (unit == COM_MPMASTER(isdp)) + printf(" master"); + printf(")"); + com->no_irq = find_isadev(isa_devtab_tty, &siodriver, + COM_MPMASTER(isdp))->id_irq == 0; + } +#endif /* COM_MULTIPORT */ + printf("\n"); + + s = spltty(); + com_addr(unit) = com; + splx(s); + + dev = makedev(CDEV_MAJOR, 0); + cdevsw_add(&dev, &sio_cdevsw, NULL); +#ifdef DEVFS + com->devfs_token_ttyd = devfs_add_devswf(&sio_cdevsw, + unit, DV_CHR, + UID_ROOT, GID_WHEEL, 0600, "ttyd%n", unit); + com->devfs_token_ttyi = devfs_add_devswf(&sio_cdevsw, + unit | CONTROL_INIT_STATE, DV_CHR, + UID_ROOT, GID_WHEEL, 0600, "ttyid%n", unit); + com->devfs_token_ttyl = devfs_add_devswf(&sio_cdevsw, + unit | CONTROL_LOCK_STATE, DV_CHR, + UID_ROOT, GID_WHEEL, 0600, "ttyld%n", unit); + com->devfs_token_cuaa = devfs_add_devswf(&sio_cdevsw, + unit | CALLOUT_MASK, DV_CHR, + UID_UUCP, GID_DIALER, 0660, "cuaa%n", unit); + com->devfs_token_cuai = devfs_add_devswf(&sio_cdevsw, + unit | CALLOUT_MASK | CONTROL_INIT_STATE, DV_CHR, + UID_UUCP, GID_DIALER, 0660, "cuaia%n", unit); + com->devfs_token_cual = devfs_add_devswf(&sio_cdevsw, + unit | CALLOUT_MASK | CONTROL_LOCK_STATE, DV_CHR, + UID_UUCP, GID_DIALER, 0660, "cuala%n", unit); +#endif + return (1); +} + +static int +sioopen(dev, flag, mode, p) + dev_t dev; + int flag; + int mode; + struct proc *p; +{ + struct com_s *com; + int error; + Port_t iobase; + int mynor; + int s; + struct tty *tp; + int unit; + + mynor = minor(dev); + unit = MINOR_TO_UNIT(mynor); + if ((u_int) unit >= NSIO || (com = com_addr(unit)) == NULL) + return (ENXIO); + if (com->gone) + return (ENXIO); + if (mynor & CONTROL_MASK) + return (0); +#if 0 /* XXX */ + tp = com->tp = sio_tty[unit] = ttymalloc(sio_tty[unit]); +#else + tp = com->tp = &sio_tty[unit]; +#endif + 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 && p->p_ucred->cr_uid != 0) { + 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_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. + */ + ttsetwater(tp); + iobase = com->iobase; + 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) { + outb(iobase + 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; + outb(iobase + com_fifo, 0); + DELAY(50); + (void) inb(com->data_port); + } + } + + disable_intr(); + (void) inb(com->line_status_port); + (void) inb(com->data_port); + com->prev_modem_status = com->last_modem_status + = inb(com->modem_status_port); + outb(iobase + com_ier, IER_ERXRDY | IER_ETXRDY | IER_ERLS + | IER_EMSC); + enable_intr(); + /* + * 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, p) + dev_t dev; + int flag; + int mode; + struct proc *p; +{ + 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)); + tp = com->tp; + s = spltty(); + (*linesw[tp->t_line].l_close)(tp, flag); + disc_optim(tp, &tp->t_termios, com); + siostop(tp, FREAD | FWRITE); + comhardclose(com); + ttyclose(tp); + siosettimeout(); + splx(s); + if (com->gone) { + printf("sio%d: gone\n", com->unit); + s = spltty(); + com_addr(com->unit) = 0; + bzero(tp,sizeof *tp); + bzero(com,sizeof *com); + free(com,M_TTYS); + splx(s); + } + return (0); +} + +static void +comhardclose(com) + struct com_s *com; +{ + Port_t iobase; + int s; + struct tty *tp; + int unit; + + unit = com->unit; + iobase = com->iobase; + s = spltty(); + com->poll = FALSE; + com->poll_output = FALSE; + com->do_timestamp = FALSE; + com->do_dcd_timestamp = FALSE; + outb(iobase + com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); + { + outb(iobase + com_ier, 0); + tp = com->tp; + 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. + */ + outb(iobase + 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; + int unit; + struct tty *tp; + + mynor = minor(dev); + if (mynor & CONTROL_MASK) + return (ENODEV); + unit = MINOR_TO_UNIT(mynor); + if (com_addr(unit)->gone) + return (ENODEV); + tp = com_addr(unit)->tp; + return ((*linesw[tp->t_line].l_read)(tp, uio, flag)); +} + +static int +siowrite(dev, uio, flag) + dev_t dev; + struct uio *uio; + int flag; +{ + int mynor; + struct tty *tp; + int unit; + + mynor = minor(dev); + if (mynor & CONTROL_MASK) + return (ENODEV); + + unit = MINOR_TO_UNIT(mynor); + if (com_addr(unit)->gone) + return (ENODEV); + tp = com_addr(unit)->tp; + /* + * (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[tp->t_line].l_write)(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); +} + +void +siointr(unit) + int unit; +{ +#ifndef COM_MULTIPORT + siointr1(com_addr(unit)); +#else /* COM_MULTIPORT */ + struct com_s *com; + bool_t possibly_more_intrs; + + /* + * 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. + */ + do { + possibly_more_intrs = FALSE; + for (unit = 0; unit < NSIO; ++unit) { + com = com_addr(unit); + if (com != NULL + && !com->gone + && (inb(com->int_id_port) & IIR_IMASK) + != IIR_NOPEND) { + siointr1(com); + possibly_more_intrs = TRUE; + } + } + } while (possibly_more_intrs); +#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; + + while (TRUE) { + 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 (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) + setsofttty(); + ioptr = com->iptr; + if (ioptr >= com->ibufend) + CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW); + else { + if (com->do_timestamp) + microtime(&com->timestamp); + ++com_events; + schedsofttty(); +#if 0 /* for testing input latency vs efficiency */ +if (com->iptr - com->ibuf == 8) + setsofttty(); +#endif + ioptr[0] = recv_data; + ioptr[CE_INPUT_OFFSET] = 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; + setsofttty(); + } + + /* 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 (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 */ + com->state &= ~CS_BUSY; + } + if (!(com->state & CS_ODONE)) { + com_events += LOTS_OF_EVENTS; + com->state |= CS_ODONE; + setsofttty(); /* handle at high level ASAP */ + } + } + } + + /* 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, p) + dev_t dev; + int cmd; + caddr_t data; + int flag; + struct proc *p; +{ + struct com_s *com; + int error; + Port_t iobase; + int mynor; + int s; + struct tty *tp; +#if defined(COMPAT_43) || defined(COMPAT_SUNOS) + int oldcmd; + struct termios term; +#endif + + mynor = minor(dev); + com = com_addr(MINOR_TO_UNIT(mynor)); + if (com->gone) + return (ENODEV); + iobase = com->iobase; + 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(p->p_ucred, &p->p_acflag); + 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); +#ifdef DSI_SOFT_MODEM + /* + * Download micro-code to Digicom modem. + */ + case TIOCDSIMICROCODE: + { + u_long l; + u_char *p,*pi; + + pi = (u_char*)(*(caddr_t*)data); + error = copyin(pi,&l,sizeof l); + if(error) + {return error;}; + pi += sizeof l; + + p = malloc(l,M_TEMP,M_NOWAIT); + if(!p) + {return ENOBUFS;} + error = copyin(pi,p,l); + if(error) + {free(p,M_TEMP); return error;}; + if(error = LoadSoftModem( + MINOR_TO_UNIT(mynor),iobase,l,p)) + {free(p,M_TEMP); return error;} + free(p,M_TEMP); + return(0); + } +#endif /* DSI_SOFT_MODEM */ + 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, p); + if (error >= 0) + return (error); + s = spltty(); + error = ttioctl(tp, cmd, data, flag); + disc_optim(tp, &tp->t_termios, com); + if (error >= 0) { + splx(s); + return (error); + } + switch (cmd) { + case TIOCSBRK: + outb(iobase + com_cfcr, com->cfcr_image |= CFCR_SBREAK); + break; + case TIOCCBRK: + outb(iobase + 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(p->p_ucred, &p->p_acflag); + 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); + return (ENOTTY); + } + splx(s); + return (0); +} + +void +siopoll() +{ + int unit; + + if (com_events == 0) + return; +repeat: + for (unit = 0; unit < NSIO; ++unit) { + u_char *buf; + struct com_s *com; + u_char *ibuf; + int incc; + struct tty *tp; + + com = com_addr(unit); + if (com == NULL) + continue; + if (com->gone) + continue; + tp = com->tp; + if (tp == NULL) { + /* + * XXX forget any events related to closed devices + * (actually never opened devices) so that we don't + * loop. + */ + disable_intr(); + 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; + enable_intr(); + if (incc != 0) + log(LOG_DEBUG, + "sio%d: %d events for device with no tp\n", + unit, incc); + continue; + } + + /* switch the role of the low-level input buffers */ + if (com->iptr == (ibuf = com->ibuf)) { + buf = NULL; /* not used, but compiler can't tell */ + incc = 0; + } else { + buf = ibuf; + disable_intr(); + incc = com->iptr - buf; + com_events -= incc; + if (ibuf == com->ibuf1) + ibuf = com->ibuf2; + else + ibuf = com->ibuf1; + com->ibufend = ibuf + RS_IBUFSIZE; + com->ihighwater = ibuf + RS_IHIGHWATER; + com->iptr = 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); + enable_intr(); + com->ibuf = ibuf; + } + + if (com->state & CS_CHECKMSR) { + u_char delta_modem_status; + + disable_intr(); + 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; + enable_intr(); + if (delta_modem_status & MSR_DCD) + (*linesw[tp->t_line].l_modem) + (tp, com->prev_modem_status & MSR_DCD); + } + if (com->state & CS_ODONE) { + disable_intr(); + com_events -= LOTS_OF_EVENTS; + com->state &= ~CS_ODONE; + enable_intr(); + 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 (incc <= 0 || !(tp->t_state & TS_ISOPEN) || + !(tp->t_cflag & CREAD)) + continue; + /* + * 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). + */ + if (tp->t_state & TS_CAN_BYPASS_L_RINT) { + if (tp->t_rawq.c_cc + incc >= RB_I_HIGH_WATER + && (com->state & CS_RTS_IFLOW + || tp->t_iflag & IXOFF) + && !(tp->t_state & TS_TBLOCK)) + ttyblock(tp); + tk_nin += incc; + tk_rawcc += incc; + tp->t_rawcc += incc; + com->delta_error_counts[CE_TTY_BUF_OVERFLOW] + += b_to_q((char *)buf, incc, &tp->t_rawq); + 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); + } + } else { + do { + u_char line_status; + int recv_data; + + line_status = (u_char) buf[CE_INPUT_OFFSET]; + recv_data = (u_char) *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); + } while (--incc > 0); + } + 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 error; + Port_t iobase; + int s; + int unit; + int txtimeout; + + /* 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); + iobase = com->iobase; + 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 + outb(iobase + com_fifo, com->fifo_image); + } + + /* + * Some UARTs lock up if the divisor latch registers are selected + * while the UART is doing output (they refuse to transmit anything + * more until given a hard reset). Fix this by stopping filling + * the device buffers and waiting for them to drain. Reading the + * line status port outside of siointr1() might lose some receiver + * error bits, but that is acceptable here. + */ + disable_intr(); +retry: + com->state &= ~CS_TTGO; + txtimeout = tp->t_timeout; + enable_intr(); + while ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) + != (LSR_TSRE | LSR_TXRDY)) { + tp->t_state |= TS_SO_OCOMPLETE; + error = ttysleep(tp, TSA_OCOMPLETE(tp), TTIPRI | PCATCH, + "siotx", hz / 100); + if ( txtimeout != 0 + && (!error || error == EAGAIN) + && (txtimeout -= hz / 100) <= 0 + ) + error = EIO; + if (com->gone) + error = ENODEV; + if (error != 0 && error != EAGAIN) { + if (!(tp->t_state & TS_TTSTOP)) { + disable_intr(); + com->state |= CS_TTGO; + enable_intr(); + } + splx(s); + return (error); + } + } + + disable_intr(); /* very important while com_data is hidden */ + + /* + * XXX - clearing CS_TTGO is not sufficient to stop further output, + * because siopoll() calls comstart() which usually sets it again + * because TS_TTSTOP is clear. Setting TS_TTSTOP would not be + * sufficient, for similar reasons. + */ + if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) + != (LSR_TSRE | LSR_TXRDY)) + goto retry; + + if (divisor != 0) { + outb(iobase + 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 (inb(iobase + com_dlbl) != dlbl) + outb(iobase + com_dlbl, dlbl); + dlbh = (u_int) divisor >> 8; + if (inb(iobase + com_dlbh) != dlbh) + outb(iobase + com_dlbh, dlbh); + } + outb(iobase + com_cfcr, com->cfcr_image = cfcr); + if (!(tp->t_state & TS_TTSTOP)) + com->state |= CS_TTGO; + if (cflag & CRTS_IFLOW) { + 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); + } + + /* + * 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; + } + /* 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); + + enable_intr(); + splx(s); + comstart(tp); + 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); + s = spltty(); + disable_intr(); + 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); + } + enable_intr(); + if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { + 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; + disable_intr(); + 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; + } + enable_intr(); + } + 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; + disable_intr(); + 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; + } + enable_intr(); + } + tp->t_state |= TS_BUSY; + } + disable_intr(); + if (com->state >= (CS_BUSY | CS_TTGO)) + siointr1(com); /* fake interrupt to start output */ + enable_intr(); + ttwwakeup(tp); + splx(s); +} + +static void +siostop(tp, rw) + struct tty *tp; + int rw; +{ + struct com_s *com; + + com = com_addr(DEV_TO_UNIT(tp->t_dev)); + if (com->gone) + return; + disable_intr(); + if (rw & FWRITE) { +#ifdef COM_ESP_BUG_FIXED + if (com->hasfifo) +#ifdef COM_ESP + /* XXX avoid h/w bug. */ + if (!com->esp) +#endif + /* XXX does this flush everything? */ + outb(com->iobase + com_fifo, + FIFO_XMT_RST | com->fifo_image); +#endif + 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) { +#ifdef COM_ESP_BUG_FIXED + if (com->hasfifo) +#ifdef COM_ESP + /* XXX avoid h/w bug. */ + if (!com->esp) +#endif + /* XXX does this flush everything? */ + outb(com->iobase + com_fifo, + FIFO_RCV_RST | com->fifo_image); +#endif + com_events -= (com->iptr - com->ibuf); + com->iptr = com->ibuf; + } + enable_intr(); + comstart(tp); +} + +static struct tty * +siodevtotty(dev) + dev_t dev; +{ + int mynor; + int unit; + + mynor = minor(dev); + if (mynor & CONTROL_MASK) + return (NULL); + unit = MINOR_TO_UNIT(mynor); + if ((u_int) unit >= NSIO) + return (NULL); + return (&sio_tty[unit]); +} + +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); + disable_intr(); + 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; + } + enable_intr(); + 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 = hz; + someopen = FALSE; + for (unit = 0; unit < NSIO; ++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; + timeout(comwakeup, (void *)NULL, sio_timeout); + } else { + /* Flush error messages, if any. */ + sio_timeouts_until_log = 1; + comwakeup((void *)NULL); + untimeout(comwakeup, (void *)NULL); + } +} + +static void +comwakeup(chan) + void *chan; +{ + struct com_s *com; + int unit; + + timeout(comwakeup, (void *)NULL, sio_timeout); + + /* + * Recover from lost output interrupts. + * Poll any lines that don't use interrupts. + */ + for (unit = 0; unit < NSIO; ++unit) { + com = com_addr(unit); + if (com != NULL && !com->gone + && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) { + disable_intr(); + siointr1(com); + enable_intr(); + } + } + + /* + * 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 < NSIO; ++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; + + disable_intr(); + delta = com->delta_error_counts[errnum]; + com->delta_error_counts[errnum] = 0; + enable_intr(); + 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; + /* + * Prepare to reduce input latency for packet + * discplines with a end of packet character. + */ + if (tp->t_line == SLIPDISC) + com->hotchar = 0xc0; + else if (tp->t_line == PPPDISC) + com->hotchar = 0x7e; + else + com->hotchar = 0; +} + +/* + * Following are all routines needed for SIO to act as console + */ +#include + +struct siocnstate { + u_char dlbl; + u_char dlbh; + u_char ier; + u_char cfcr; + u_char mcr; +}; + +static Port_t siocniobase; + +static void siocnclose __P((struct siocnstate *sp)); +static void siocnopen __P((struct siocnstate *sp)); +static void siocntxwait __P((void)); + +static void +siocntxwait() +{ + 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(siocniobase + com_lsr) & (LSR_TSRE | LSR_TXRDY)) + != (LSR_TSRE | LSR_TXRDY) && --timo != 0) + ; +} + +static void +siocnopen(sp) + struct siocnstate *sp; +{ + int divisor; + u_char dlbh; + u_char dlbl; + Port_t iobase; + + /* + * 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. + */ + iobase = siocniobase; + sp->ier = inb(iobase + com_ier); + outb(iobase + com_ier, 0); /* spltty() doesn't stop siointr() */ + siocntxwait(); + 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(comdefaultrate, 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) + struct siocnstate *sp; +{ + Port_t iobase; + + /* + * Restore the device control registers. + */ + siocntxwait(); + iobase = siocniobase; + 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); +} + +void +siocnprobe(cp) + struct consdev *cp; +{ + int unit; + + /* XXX: ick */ + unit = DEV_TO_UNIT(CONUNIT); + siocniobase = CONADDR; + + /* make sure hardware exists? XXX */ + + /* initialize required fields */ + cp->cn_dev = makedev(CDEV_MAJOR, unit); +#ifdef COMCONSOLE + cp->cn_pri = CN_REMOTE; /* Force a serial port console */ +#else + cp->cn_pri = (boothowto & RB_SERIAL) ? CN_REMOTE : CN_NORMAL; +#endif +} + +void +siocninit(cp) + struct consdev *cp; +{ + comconsole = DEV_TO_UNIT(cp->cn_dev); +} + +int +siocncheckc(dev) + dev_t dev; +{ + int c; + Port_t iobase; + int s; + struct siocnstate sp; + + iobase = siocniobase; + s = spltty(); + siocnopen(&sp); + if (inb(iobase + com_lsr) & LSR_RXRDY) + c = inb(iobase + com_data); + else + c = -1; + siocnclose(&sp); + splx(s); + return (c); +} + + +int +siocngetc(dev) + dev_t dev; +{ + int c; + Port_t iobase; + int s; + struct siocnstate sp; + + iobase = siocniobase; + s = spltty(); + siocnopen(&sp); + while (!(inb(iobase + com_lsr) & LSR_RXRDY)) + ; + c = inb(iobase + com_data); + siocnclose(&sp); + splx(s); + return (c); +} + +void +siocnputc(dev, c) + dev_t dev; + int c; +{ + int s; + struct siocnstate sp; + + s = spltty(); + siocnopen(&sp); + siocntxwait(); + outb(siocniobase + com_data, c); + siocnclose(&sp); + splx(s); +} + +#ifdef DSI_SOFT_MODEM +/* + * The magic code to download microcode to a "Connection 14.4+Fax" + * modem from Digicom Systems Inc. Very magic. + */ + +#define DSI_ERROR(str) { ptr = str; goto error; } +static int +LoadSoftModem(int unit, int base_io, u_long size, u_char *ptr) +{ + int int_c,int_k; + int data_0188, data_0187; + + /* + * First see if it is a DSI SoftModem + */ + if(!((inb(base_io+7) ^ inb(base_io+7) & 0x80))) + return ENODEV; + + data_0188 = inb(base_io+4); + data_0187 = inb(base_io+3); + outb(base_io+3,0x80); + outb(base_io+4,0x0C); + outb(base_io+0,0x31); + outb(base_io+1,0x8C); + outb(base_io+7,0x10); + outb(base_io+7,0x19); + + if(0x18 != (inb(base_io+7) & 0x1A)) + DSI_ERROR("dsp bus not granted"); + + if(0x01 != (inb(base_io+7) & 0x01)) { + outb(base_io+7,0x18); + outb(base_io+7,0x19); + if(0x01 != (inb(base_io+7) & 0x01)) + DSI_ERROR("program mem not granted"); + } + + int_c = 0; + + while(1) { + if(int_c >= 7 || size <= 0x1800) + break; + + for(int_k = 0 ; int_k < 0x800; int_k++) { + outb(base_io+0,*ptr++); + outb(base_io+1,*ptr++); + outb(base_io+2,*ptr++); + } + + size -= 0x1800; + int_c++; + } + + if(size > 0x1800) { + outb(base_io+7,0x18); + outb(base_io+7,0x19); + if(0x00 != (inb(base_io+7) & 0x01)) + DSI_ERROR("program data not granted"); + + for(int_k = 0 ; int_k < 0x800; int_k++) { + outb(base_io+1,*ptr++); + outb(base_io+2,0); + outb(base_io+1,*ptr++); + outb(base_io+2,*ptr++); + } + + size -= 0x1800; + + while(size > 0x1800) { + for(int_k = 0 ; int_k < 0xC00; int_k++) { + outb(base_io+1,*ptr++); + outb(base_io+2,*ptr++); + } + size -= 0x1800; + } + + if(size < 0x1800) { + for(int_k=0;int_k 0) { + if(int_c == 7) { + outb(base_io+7,0x18); + outb(base_io+7,0x19); + if(0x00 != (inb(base_io+7) & 0x01)) + DSI_ERROR("program data not granted"); + for(int_k = 0 ; int_k < size/3; int_k++) { + outb(base_io+1,*ptr++); + outb(base_io+2,0); + outb(base_io+1,*ptr++); + outb(base_io+2,*ptr++); + } + } else { + for(int_k = 0 ; int_k < size/3; int_k++) { + outb(base_io+0,*ptr++); + outb(base_io+1,*ptr++); + outb(base_io+2,*ptr++); + } + } + } + outb(base_io+7,0x11); + outb(base_io+7,3); + + outb(base_io+4,data_0188 & 0xfb); + + outb(base_io+3,data_0187); + + return 0; +error: + printf("sio%d: DSI SoftModem microcode load failed: <%s>\n",unit,ptr); + outb(base_io+7,0x00); \ + outb(base_io+3,data_0187); \ + outb(base_io+4,data_0188); \ + return EIO; +} +#endif /* DSI_SOFT_MODEM */ Property changes on: cvs2svn/branches/WHISTLE_SIO_RFC/sys/i386/isa/sio.c ___________________________________________________________________ Added: svn:keywords ## -0,0 +1 ## +FreeBSD=%H \ No newline at end of property