/*- * 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 1.33 1997/08/20 10:25:21 kato 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 */ /*=============================================================== * 386BSD(98),FreeBSD-1.1x(98) com driver. * ----- * modified for PC9801 by M.Ishii * Kyoto University Microcomputer Club (KMC) * Chou "TEFUTEFU" Hirotomi * Kyoto Univ. the faculty of medicine *=============================================================== * FreeBSD-2.0.1(98) sio driver. * ----- * modified for pc98 Internal i8251 and MICRO CORE MC16550II * T.Koike(hfc01340@niftyserve.or.jp) * implement kernel device configuration * aizu@orient.center.nitech.ac.jp * * Notes. * ----- * PC98 localization based on 386BSD(98) com driver. Using its PC98 local * functions. * This driver is under debugging,has bugs. * * 1) config * options COM_MULTIPORT #if using MC16550II * device sio0 at nec? port 0x30 tty irq 4 vector siointr #internal * device sio1 at nec? port 0xd2 tty irq 5 flags 0x101 vector siointr #mc1 * device sio2 at nec? port 0x8d2 tty flags 0x101 vector siointr #mc2 * # ~~~~~iobase ~~multi port flag * # ~ master device is sio1 * 2) device * cd /dev; MAKEDEV ttyd0 ttyd1 .. * 3) /etc/rc.serial * 57600bps is too fast for sio0(internal8251) * my ex. * #set default speed 9600 * modem() * : * stty last update: 15 Sep.1995 * * How to configure... * # options COM_MULTIPORT # support for MICROCORE MC16550II * ... comment-out this line, which will conflict with B98_01. * options "B98_01" # support for AIWA B98-01 * device sio1 at nec? port 0x00d1 tty irq ? vector siointr * device sio2 at nec? port 0x00d5 tty irq ? vector siointr * ... you can leave these lines `irq ?', irq will be autodetected. */ #ifdef PC98 #define MC16550 0 #define COM_IF_INTERNAL 1 #if 0 #define COM_IF_PC9861K 2 #define COM_IF_PIO9032B 3 #endif #ifdef B98_01 #undef COM_MULTIPORT /* COM_MULTIPORT will conflict with B98_01 */ #define COM_IF_B98_01 4 #endif /* B98_01 */ #endif /* PC98 */ #include #include #include #include #include #include #include #include #include #include #include #include #ifdef DEVFS #include #endif #include #ifdef PC98 #include #include #include #include #include #include #else #include #include #include #endif #include #ifdef COM_ESP #include #endif #include #include "crd.h" #if NCRD > 0 #include #include #include #endif #ifdef APIC_IO /* * INTs are masked in the (global) IO APIC, * but the IRR register is in each LOCAL APIC, * so we would have to unmask the INT to be able to "see INT pending". * So instead we just look in the 8259 ICU. */ #define isa_irq_pending icu_irq_pending #endif /* APIC_IO */ #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_CONSOLE(dev) ((dev)->id_flags & 0x10) #define COM_FORCECONSOLE(dev) ((dev)->id_flags & 0x20) #define COM_LLCONSOLE(dev) ((dev)->id_flags & 0x40) #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_NOTST3(dev) ((dev)->id_flags & 0x10000) #define COM_ST16650A(dev) ((dev)->id_flags & 0x20000) #define COM_FIFOSIZE(dev) (((dev)->id_flags & 0xff000000) >> 24) #ifndef PC98 #define com_scr 7 /* scratch register for 16450-16550 (R/W) */ #endif /* !PC98 */ /* * 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 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 *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 */ #ifdef PC98 Port_t cmd_port; Port_t sts_port; Port_t in_modem_port; Port_t intr_ctrl_port; int intr_enable; int pc98_prev_modem_status; int pc98_modem_delta; int modem_car_chg_timer; int pc98_prev_siocmd; int pc98_prev_siomod; int modem_checking; int pc98_if_type; #endif /* PC98 */ 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 int tiocm_xxx2mcr __P((int tiocm_xxx)); 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 volatile speed_t comdefaultrate = CONSPEED; static u_int com_events; /* input chars + weighted output completions */ static Port_t siocniobase; 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; #ifdef PC98 struct siodev { short if_type; short irq; Port_t cmd, sts, ctrl, mod; }; static int sysclock; static short port_table[5][3] = { {0x30, 0xb1, 0xb9}, {0x32, 0xb3, 0xbb}, {0x32, 0xb3, 0xbb}, {0x33, 0xb0, 0xb2}, {0x35, 0xb0, 0xb2} }; #define PC98SIO_data_port(ch) port_table[0][ch] #define PC98SIO_cmd_port(ch) port_table[1][ch] #define PC98SIO_sts_port(ch) port_table[2][ch] #define PC98SIO_in_modem_port(ch) port_table[3][ch] #define PC98SIO_intr_ctrl_port(ch) port_table[4][ch] #ifdef COM_IF_PIO9032B #define IO_COM_PIO9032B_2 0x0b8 #define IO_COM_PIO9032B_3 0x0ba #endif /* COM_IF_PIO9032B */ #ifdef COM_IF_B98_01 #define IO_COM_B98_01_2 0x0d1 #define IO_COM_B98_01_3 0x0d5 #endif /* COM_IF_B98_01 */ #define COM_INT_DISABLE {int previpri; previpri=spltty(); #define COM_INT_ENABLE splx(previpri);} #define IEN_TxFLAG IEN_Tx #define COM_CARRIER_DETECT_EMULATE 0 #define PC98_CHECK_MODEM_INTERVAL (hz/10) #define DCD_OFF_TOLERANCE 2 #define DCD_ON_RECOGNITION 2 #define IS_8251(type) (type != MC16550) #define IS_PC98IN(adr) (adr == 0x30) static void commint __P((dev_t dev)); static void com_tiocm_set __P((struct com_s *com, int msr)); static void com_tiocm_bis __P((struct com_s *com, int msr)); static void com_tiocm_bic __P((struct com_s *com, int msr)); static int com_tiocm_get __P((struct com_s *com)); static int com_tiocm_get_delta __P((struct com_s *com)); static void pc98_msrint_start __P((dev_t dev)); static void com_cflag_and_speed_set __P((struct com_s *com, int cflag, int speed)); static int pc98_ttspeedtab __P((struct com_s *com, int speed)); static int pc98_get_modem_status __P((struct com_s *com)); static timeout_t pc98_check_msr; static void pc98_set_baud_rate __P((struct com_s *com, int count)); static void pc98_i8251_reset __P((struct com_s *com, int mode, int command)); static void pc98_disable_i8251_interrupt __P((struct com_s *com, int mod)); static void pc98_enable_i8251_interrupt __P((struct com_s *com, int mod)); static int pc98_check_i8251_interrupt __P((struct com_s *com)); static int pc98_i8251_get_cmd __P((struct com_s *com)); static int pc98_i8251_get_mod __P((struct com_s *com)); static void pc98_i8251_set_cmd __P((struct com_s *com, int x)); static void pc98_i8251_or_cmd __P((struct com_s *com, int x)); static void pc98_i8251_clear_cmd __P((struct com_s *com, int x)); static void pc98_i8251_clear_or_cmd __P((struct com_s *com, int clr, int x)); static int pc98_check_if_type __P((int iobase, struct siodev *iod)); static void pc98_check_sysclock __P((void)); static int pc98_set_ioport __P((struct com_s *com, int io_base)); #define com_int_Tx_disable(com) \ pc98_disable_i8251_interrupt(com,IEN_Tx|IEN_TxEMP) #define com_int_Tx_enable(com) \ pc98_enable_i8251_interrupt(com,IEN_TxFLAG) #define com_int_Rx_disable(com) \ pc98_disable_i8251_interrupt(com,IEN_Rx) #define com_int_Rx_enable(com) \ pc98_enable_i8251_interrupt(com,IEN_Rx) #define com_int_TxRx_disable(com) \ pc98_disable_i8251_interrupt(com,IEN_Tx|IEN_TxEMP|IEN_Rx) #define com_int_TxRx_enable(com) \ pc98_enable_i8251_interrupt(com,IEN_TxFLAG|IEN_Rx) #define com_send_break_on(com) \ pc98_i8251_or_cmd(com,CMD8251_SBRK) #define com_send_break_off(com) \ pc98_i8251_clear_cmd(com,CMD8251_SBRK) struct speedtab pc98speedtab[] = { /* internal RS232C interface */ 0, 0, 50, 50, 75, 75, 150, 150, 200, 200, 300, 300, 600, 600, 1200, 1200, 2400, 2400, 4800, 4800, 9600, 9600, 19200, 19200, 38400, 38400, 76800, 76800, 20800, 20800, 41600, 41600, 15600, 15600, 31200, 31200, 62400, 62400, -1, -1 }; #ifdef COM_IF_PIO9032B struct speedtab comspeedtab_pio9032b[] = { 300, 6, 600, 5, 1200, 4, 2400, 3, 4800, 2, 9600, 1, 19200, 0, 38400, 7, -1, -1 }; #endif #ifdef COM_IF_B98_01 struct speedtab comspeedtab_b98_01[] = { 0, 0, 75, 15, 150, 14, 300, 13, 600, 12, 1200, 11, 2400, 10, 4800, 9, 9600, 8, 19200, 7, 38400, 6, 76800, 5, 153600, 4, -1, -1 }; #endif #endif /* PC98 */ 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 /* * 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) 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", ""); #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_LOCK(); com = com_addr(dp->isahd.id_unit); if (com && !com_addr(dp->isahd.id_unit)->gone) siointr1(com_addr(dp->isahd.id_unit)); COM_UNLOCK(); 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; #ifdef PC98 struct isa_device *xdev; int irqout=0; int ret = 0; int tmp; struct siodev iod; #else struct isa_device *xdev; #endif 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) #ifdef PC98 if (IS_PC98IN(xdev->id_iobase)) outb(xdev->id_iobase + 2, 0xf2); else #endif 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; } #ifdef PC98 /* * If the port is i8251 UART (internal, B98_01) */ if(pc98_check_if_type(dev->id_iobase, &iod) == -1) return 0; if(IS_8251(iod.if_type)){ if ( iod.irq > 0 ) dev->id_irq = (1 << iod.irq); outb(iod.cmd, 0); DELAY(10); outb(iod.cmd, 0); DELAY(10); outb(iod.cmd, 0); DELAY(10); outb(iod.cmd, CMD8251_RESET); DELAY(1000); /* for a while...*/ outb(iod.cmd, 0xf2); /* MODE (dummy) */ DELAY(10); outb(iod.cmd, 0x01); /* CMD (dummy) */ DELAY(1000); /* for a while...*/ if (( inb(iod.sts) & STS8251_TxEMP ) == 0 ) { ret = 0; } switch (iod.if_type) { case COM_IF_INTERNAL: COM_INT_DISABLE tmp = ( inb( iod.ctrl ) & ~(IEN_Rx|IEN_TxEMP|IEN_Tx)); outb( iod.ctrl, tmp|IEN_TxEMP ); ret = isa_irq_pending(dev) ? 4 : 0; outb( iod.ctrl, tmp ); COM_INT_ENABLE break; #ifdef COM_IF_B98_01 case COM_IF_B98_01: /* B98_01 doesn't activate TxEMP interrupt line when being reset, so we can't check irq pending.*/ ret = 4; break; #endif } if (epson_machine_id==0x20) { /* XXX */ ret = 4; } return ret; } #endif /* PC98 */ /* * 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); } #ifndef PC98 if (!COM_NOTAST4(dev)) { outb(idev->id_iobase + com_scr, idev->id_irq ? 0x80 : 0); mcr_image = 0; } #endif /* !PC98 */ } #endif /* COM_MULTIPORT */ if (idev->id_irq == 0) mcr_image = 0; #ifdef PC98 switch(idev->id_irq){ case IRQ3: irqout = 4; break; case IRQ5: irqout = 5; break; case IRQ6: irqout = 6; break; case IRQ12: irqout = 7; break; default: printf("sio%d: irq configuration error\n",dev->id_unit); return (0); } outb(dev->id_iobase+0x1000, irqout); #endif bzero(failures, sizeof failures); iobase = dev->id_iobase; if (COM_LLCONSOLE(dev)) { printf("sio%d: reserved for low-level i/o\n", dev->id_unit); return (0); } /* * 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. */ if (iobase == siocniobase) DELAY((16 + 1) * 1000000 / (comdefaultrate / 10)); else { outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS); outb(iobase + com_dlbl, COMBRD(SIO_TEST_SPEED) & 0xff); outb(iobase + com_dlbh, (u_int) COMBRD(SIO_TEST_SPEED) >> 8); outb(iobase + 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? */ 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 / (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? */ 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 && !COM_NOTST3(idev)) 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; #ifdef PC98 if(pc98_set_ioport(com, iobase) == -1) if((iobase & 0x0f0) == 0xd0) { com->pc98_if_type = MC16550; 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; } #else /* not PC98 */ 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; #endif /* * 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) { #ifdef PC98 if(IS_8251(com->pc98_if_type)) DELAY(100000); #endif 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; 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 */ #ifndef PC98 #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; } } #endif /* !PC98 */ #ifdef PC98 if(IS_8251(com->pc98_if_type)){ com_int_TxRx_disable( com ); com_cflag_and_speed_set( com, com->it_in.c_cflag, comdefaultrate ); com_tiocm_bic( com, TIOCM_DTR|TIOCM_RTS|TIOCM_LE ); com_send_break_off( com ); switch(com->pc98_if_type){ case COM_IF_INTERNAL: printf(" 8251 (internal)"); break; #ifdef COM_IF_PC9861K case COM_IF_PC9861K: printf(" 8251 (PC9861K)"); break; #endif #ifdef COM_IF_PIO9032B case COM_IF_PIO9032B: printf(" 8251 (PIO9032B)"); break; #endif #ifdef COM_IF_B98_01 case COM_IF_B98_01: printf(" 8251 (B98_01)"); break; #endif } } else { #endif /* PC98 */ outb(iobase + 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(isdp)) { printf(" 16550A fifo disabled"); } else { com->hasfifo = TRUE; if (COM_ST16650A(isdp)) { com->st16650a = 1; com->tx_fifo_size = 32; printf(" ST16650A"); } else { com->tx_fifo_size = COM_FIFOSIZE(isdp); printf(" 16550A"); } } #ifdef COM_ESP for (espp = likely_esp_ports; *espp != 0; espp++) if (espattach(isdp, 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 */ 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 */ #ifdef PC98 } #endif if (unit == comconsole) printf(", console"); 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; #ifdef PC98 if(!IS_8251(com->pc98_if_type)) #endif (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; #ifdef PC98 if(IS_8251(com->pc98_if_type)){ com_tiocm_bis(com, TIOCM_DTR|TIOCM_RTS); pc98_msrint_start(dev); } #endif /* * 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(); COM_LOCK(); #ifdef PC98 if(IS_8251(com->pc98_if_type)){ com_tiocm_bis(com, TIOCM_LE); com->pc98_prev_modem_status = pc98_get_modem_status(com); com_int_Rx_enable(com); } else { #endif (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); #ifdef PC98 } #endif COM_UNLOCK(); 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. */ #ifdef PC98 if ((IS_8251(com->pc98_if_type) && (pc98_get_modem_status(com) & TIOCM_CAR)) || (!IS_8251(com->pc98_if_type) && (com->prev_modem_status & MSR_DCD)) || mynor & CALLOUT_MASK) #else if (com->prev_modem_status & MSR_DCD || mynor & CALLOUT_MASK) #endif (*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); #ifdef PC98 com->modem_checking = 0; #endif 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; #ifdef PC98 if(IS_8251(com->pc98_if_type)) com_send_break_off(com); else #endif outb(iobase + com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); { #ifdef PC98 int tmp; if(IS_8251(com->pc98_if_type)) com_int_TxRx_disable(com); else #endif outb(iobase + com_ier, 0); tp = com->tp; #ifdef PC98 if(IS_8251(com->pc98_if_type)) tmp = pc98_get_modem_status(com) & TIOCM_CAR; else tmp = com->prev_modem_status & MSR_DCD; #endif 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 #ifdef PC98 && !(tmp) #else && !(com->prev_modem_status & MSR_DCD) #endif && !(com->it_in.c_cflag & CLOCAL) || !(tp->t_state & TS_ISOPEN)) { #ifdef PC98 if(IS_8251(com->pc98_if_type)) com_tiocm_bic(com, TIOCM_DTR|TIOCM_RTS|TIOCM_LE); else #endif (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; } } #ifdef PC98 else { if(IS_8251(com->pc98_if_type)) com_tiocm_bic(com, TIOCM_LE ); } #endif } 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. */ #ifdef PC98 else if (IS_8251(com->pc98_if_type) && (inb(com->sts_port) & (STS8251_TxRDY | STS8251_TxEMP)) == (STS8251_TxRDY | STS8251_TxEMP) || (inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) == (LSR_TSRE | LSR_TXRDY)) { #else else if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) == (LSR_TSRE | LSR_TXRDY)) { #endif 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 COM_LOCK(); siointr1(com_addr(unit)); COM_UNLOCK(); #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. */ COM_LOCK(); do { possibly_more_intrs = FALSE; for (unit = 0; unit < NSIO; ++unit) { com = com_addr(unit); #ifdef PC98 if (com != NULL && !com->gone && IS_8251(com->pc98_if_type)){ siointr1(com); } else #endif /* PC98 */ if (com != NULL && !com->gone && (inb(com->int_id_port) & IIR_IMASK) != IIR_NOPEND) { siointr1(com); possibly_more_intrs = TRUE; } } } while (possibly_more_intrs); COM_UNLOCK(); #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; #ifdef PC98 u_char tmp=0; recv_data=0; #endif /* PC98 */ while (TRUE) { #ifdef PC98 status_read:; if (IS_8251(com->pc98_if_type)) { tmp = inb(com->sts_port); more_intr: line_status = 0; if (tmp & STS8251_TxRDY) line_status |= LSR_TXRDY; if (tmp & STS8251_RxRDY) line_status |= LSR_RXRDY; if (tmp & STS8251_TxEMP) line_status |= LSR_TSRE; if (tmp & STS8251_PE) line_status |= LSR_PE; if (tmp & STS8251_OE) line_status |= LSR_OE; if (tmp & STS8251_FE) line_status |= LSR_FE; if (tmp & STS8251_BD_SD) line_status |= LSR_BI; } else #endif /* PC98 */ 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? */ #ifdef PC98 if(IS_8251(com->pc98_if_type)){ recv_data = inb(com->data_port); if(tmp & 0x78){ pc98_i8251_or_cmd(com,CMD8251_ER); recv_data = 0; } } else { #endif /* PC98 */ if (!(line_status & LSR_RXRDY)) recv_data = 0; else recv_data = inb(com->data_port); #ifdef PC98 } #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) 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) #ifdef PC98 if(IS_8251(com->pc98_if_type)) com_tiocm_bic(com, TIOCM_RTS); else #endif 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 */ #ifdef PC98 if(IS_8251(com->pc98_if_type)) goto status_read; else #endif line_status = inb(com->line_status_port) & 0x7F; } /* modem status change? (always check before doing output) */ #ifdef PC98 if(!IS_8251(com->pc98_if_type)){ #endif 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; } } #ifdef PC98 } #endif /* 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; } #ifdef PC98 if(IS_8251(com->pc98_if_type)) if ( !(pc98_check_i8251_interrupt(com) & IEN_TxFLAG) ) com_int_Tx_enable(com); #endif 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 defined(PC98) if(IS_8251(com->pc98_if_type)) if ( pc98_check_i8251_interrupt(com) & IEN_TxFLAG ) com_int_Tx_disable(com); #endif } if (!(com->state & CS_ODONE)) { com_events += LOTS_OF_EVENTS; com->state |= CS_ODONE; setsofttty(); /* handle at high level ASAP */ } } } #ifdef PC98 else if (line_status & LSR_TXRDY) { if(IS_8251(com->pc98_if_type)) if ( pc98_check_i8251_interrupt(com) & IEN_TxFLAG ) com_int_Tx_disable(com); } if(IS_8251(com->pc98_if_type)) if ((tmp = inb(com->sts_port)) & STS8251_RxRDY) goto more_intr; #endif /* finished? */ #ifndef COM_MULTIPORT #ifdef PC98 if(IS_8251(com->pc98_if_type)) return; #endif 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); } #ifdef PC98 if(IS_8251(com->pc98_if_type)){ switch (cmd) { case TIOCSBRK: com_send_break_on( com ); break; case TIOCCBRK: com_send_break_off( com ); break; case TIOCSDTR: com_tiocm_bis(com, TIOCM_DTR | TIOCM_RTS ); break; case TIOCCDTR: com_tiocm_bic(com, TIOCM_DTR); 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: com_tiocm_set( com, *(int *)data ); break; case TIOCMBIS: com_tiocm_bis( com, *(int *)data ); break; case TIOCMBIC: com_tiocm_bic( com, *(int *)data ); break; case TIOCMGET: *(int *)data = com_tiocm_get(com); 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); } } else { #endif 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; 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; default: splx(s); return (ENOTTY); } #ifdef PC98 } #endif 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; #ifdef PC98 int tmp; #endif 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(); COM_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; COM_UNLOCK(); 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(); COM_LOCK(); 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. */ #ifdef PC98 if(IS_8251(com->pc98_if_type)) tmp = com_tiocm_get(com) & TIOCM_RTS; else tmp = com->mcr_image & MCR_RTS; #endif if ((com->state & CS_RTS_IFLOW) #ifdef PC98 && !(tmp) #else && !(com->mcr_image & MCR_RTS) #endif && !(tp->t_state & TS_TBLOCK)) #ifdef PC98 if(IS_8251(com->pc98_if_type)) com_tiocm_bis(com, TIOCM_RTS); else #endif outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); COM_UNLOCK(); enable_intr(); com->ibuf = ibuf; } if (com->state & CS_CHECKMSR) { u_char delta_modem_status; #ifdef PC98 if(!IS_8251(com->pc98_if_type)){ #endif disable_intr(); COM_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; COM_UNLOCK(); enable_intr(); if (delta_modem_status & MSR_DCD) (*linesw[tp->t_line].l_modem) (tp, com->prev_modem_status & MSR_DCD); #ifdef PC98 } #endif } if (com->state & CS_ODONE) { disable_intr(); COM_LOCK(); com_events -= LOTS_OF_EVENTS; com->state &= ~CS_ODONE; COM_UNLOCK(); 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; #ifdef PC98 Port_t tmp_port; int tmp_flg; #endif #ifdef PC98 cfcr = 0; unit = DEV_TO_UNIT(tp->t_dev); com = com_addr(unit); iobase = com->iobase; if(IS_8251(com->pc98_if_type)) { divisor = pc98_ttspeedtab(com, t->c_ospeed); } else #endif /* 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 */ #ifndef PC98 unit = DEV_TO_UNIT(tp->t_dev); com = com_addr(unit); iobase = com->iobase; #endif s = spltty(); #ifdef PC98 if(IS_8251(com->pc98_if_type)){ if(divisor == 0){ com_int_TxRx_disable( com ); com_tiocm_bic( com, TIOCM_DTR|TIOCM_RTS|TIOCM_LE ); } } else { #endif if (divisor == 0) (void)commctl(com, TIOCM_DTR, DMBIC); /* hang up line */ else (void)commctl(com, TIOCM_DTR, DMBIS); #ifdef PC98 } #endif cflag = t->c_cflag; #ifdef PC98 if(!IS_8251(com->pc98_if_type)){ #endif 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. */ #ifdef PC98 } #endif disable_intr(); COM_LOCK(); retry: com->state &= ~CS_TTGO; txtimeout = tp->t_timeout; COM_UNLOCK(); enable_intr(); #ifdef PC98 if(IS_8251(com->pc98_if_type)){ tmp_port = com->sts_port; tmp_flg = (STS8251_TxRDY|STS8251_TxEMP); } else { tmp_port = com->line_status_port; tmp_flg = (LSR_TSRE|LSR_TXRDY); } while ((inb(tmp_port) & tmp_flg) != tmp_flg) { #else while ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) != (LSR_TSRE | LSR_TXRDY)) { #endif 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_LOCK(); com->state |= CS_TTGO; COM_UNLOCK(); enable_intr(); } splx(s); return (error); } } disable_intr(); /* very important while com_data is hidden */ COM_LOCK(); /* * 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. */ #ifdef PC98 if ((inb(tmp_port) & tmp_flg) != tmp_flg) #else if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY)) != (LSR_TSRE | LSR_TXRDY)) #endif goto retry; #ifdef PC98 if(!IS_8251(com->pc98_if_type)){ #endif 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); #ifdef PC98 } else com_cflag_and_speed_set(com, cflag, t->c_ospeed); #endif if (!(tp->t_state & TS_TTSTOP)) if (com->st16650a) { outb(iobase + com_cfcr, 0xbf); outb(iobase + com_fifo, inb(iobase + com_fifo) | 0x40); } 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. */ #ifdef PC98 if(IS_8251(com->pc98_if_type)) com_tiocm_bis(com, TIOCM_RTS); else #endif outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); if (com->st16650a) { outb(iobase + com_cfcr, 0xbf); outb(iobase + com_fifo, inb(iobase + 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; #ifdef PC98 if(IS_8251(com->pc98_if_type)){ if (!(pc98_get_modem_status(com) & TIOCM_CTS)) com->state &= ~CS_ODEVREADY; } else { #endif if (!(com->last_modem_status & MSR_CTS)) if (com->st16650a) { outb(iobase + com_cfcr, 0xbf); outb(iobase + com_fifo, inb(iobase + com_fifo) | 0x80); } #ifdef PC98 } #endif } else { if (com->st16650a) { outb(iobase + com_cfcr, 0xbf); outb(iobase + com_fifo, inb(iobase + com_fifo) & ~0x80); } com->state &= ~CS_ODEVREADY; } outb(iobase + 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); COM_UNLOCK(); enable_intr(); splx(s); comstart(tp); return (0); } static void comstart(tp) struct tty *tp; { struct com_s *com; int s; int unit; #ifdef PC98 int tmp; #endif unit = DEV_TO_UNIT(tp->t_dev); com = com_addr(unit); s = spltty(); disable_intr(); COM_LOCK(); if (tp->t_state & TS_TTSTOP) com->state &= ~CS_TTGO; else com->state |= CS_TTGO; if (tp->t_state & TS_TBLOCK) { #ifdef PC98 if(IS_8251(com->pc98_if_type)) tmp = com_tiocm_get(com) & TIOCM_RTS; else tmp = com->mcr_image & MCR_RTS; if (tmp && (com->state & CS_RTS_IFLOW)) #else if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW) #endif #ifdef PC98 if(IS_8251(com->pc98_if_type)) com_tiocm_bic(com, TIOCM_RTS); else #endif outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS); } else { #ifdef PC98 if(IS_8251(com->pc98_if_type)) tmp = com_tiocm_get(com) & TIOCM_RTS; else tmp = com->mcr_image & MCR_RTS; if (!(tmp) && com->iptr < com->ihighwater && com->state & CS_RTS_IFLOW) #else if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater && com->state & CS_RTS_IFLOW) #endif #ifdef PC98 if(IS_8251(com->pc98_if_type)) com_tiocm_bis(com, TIOCM_RTS); else #endif outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS); } COM_UNLOCK(); enable_intr(); if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { #ifdef PC98 /* if(IS_8251(com->pc98_if_type)) com_int_Tx_enable(com); */ #endif 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(); COM_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; } COM_UNLOCK(); 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(); COM_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; } COM_UNLOCK(); enable_intr(); } tp->t_state |= TS_BUSY; } disable_intr(); COM_LOCK(); if (com->state >= (CS_BUSY | CS_TTGO)) siointr1(com); /* fake interrupt to start output */ COM_UNLOCK(); enable_intr(); #ifdef PC98 /* if(IS_8251(com->pc98_if_type)) com_int_Tx_enable(com); */ #endif 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(); COM_LOCK(); if (rw & FWRITE) { 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); 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 /* XXX does this flush everything? */ outb(com->iobase + com_fifo, FIFO_RCV_RST | com->fifo_image); com_events -= (com->iptr - com->ibuf); com->iptr = com->ibuf; } COM_UNLOCK(); 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(); COM_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; } COM_UNLOCK(); 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(); COM_LOCK(); siointr1(com); COM_UNLOCK(); 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(); COM_LOCK(); delta = com->delta_error_counts[errnum]; com->delta_error_counts[errnum] = 0; COM_UNLOCK(); 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); } } } #ifdef PC98 /* commint is called when modem control line changes */ static void commint(dev_t dev) { register struct tty *tp; int stat,delta; struct com_s *com; int mynor,unit; mynor = minor(dev); unit = MINOR_TO_UNIT(mynor); com = com_addr(unit); tp = com->tp; stat = com_tiocm_get(com); delta = com_tiocm_get_delta(com); if (com->state & CS_CTS_OFLOW) { if (stat & TIOCM_CTS) com->state |= CS_ODEVREADY; else com->state &= ~CS_ODEVREADY; } if ((delta & TIOCM_CAR) && (mynor & CALLOUT_MASK) == 0) { if (stat & TIOCM_CAR ) (void)(*linesw[tp->t_line].l_modem)(tp, 1); else if ((*linesw[tp->t_line].l_modem)(tp, 0) == 0) { /* negate DTR, RTS */ com_tiocm_bic(com, (tp->t_cflag & HUPCL) ? TIOCM_DTR|TIOCM_RTS|TIOCM_LE : TIOCM_LE ); /* disable IENABLE */ com_int_TxRx_disable( com ); } } } #endif 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 speed_t siocngetspeed __P((Port_t, struct speedtab *)); 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) ; } /* * 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 */ } 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; { struct isa_device *dvp; int s; struct siocnstate sp; speed_t boot_speed; /* * 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 (dvp = isa_devtab_tty; dvp->id_driver != NULL; dvp++) if (dvp->id_driver == &siodriver && dvp->id_enabled && COM_CONSOLE(dvp)) { siocniobase = dvp->id_iobase; s = spltty(); if (boothowto & RB_SERIAL) { boot_speed = siocngetspeed(siocniobase, comspeedtab); if (boot_speed) comdefaultrate = boot_speed; } siocnopen(&sp); splx(s); if (!COM_LLCONSOLE(dvp)) { cp->cn_dev = makedev(CDEV_MAJOR, dvp->id_unit); cp->cn_pri = COM_FORCECONSOLE(dvp) || boothowto & RB_SERIAL ? CN_REMOTE : CN_NORMAL; } break; } } 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 */ #ifdef PC98 /* * pc98 local function */ static void com_tiocm_set(struct com_s *com, int msr) { int s; int tmp = 0; int mask = CMD8251_TxEN|CMD8251_RxEN|CMD8251_DTR|CMD8251_RTS; s=spltty(); com->pc98_prev_modem_status = ( msr & (TIOCM_LE|TIOCM_DTR|TIOCM_RTS) ) | ( com->pc98_prev_modem_status & ~(TIOCM_LE|TIOCM_DTR|TIOCM_RTS) ); tmp |= (CMD8251_TxEN|CMD8251_RxEN); if ( msr & TIOCM_DTR ) tmp |= CMD8251_DTR; if ( msr & TIOCM_RTS ) tmp |= CMD8251_RTS; pc98_i8251_clear_or_cmd( com, mask, tmp ); splx(s); } static void com_tiocm_bis(struct com_s *com, int msr) { int s; int tmp = 0; s=spltty(); com->pc98_prev_modem_status |= ( msr & (TIOCM_LE|TIOCM_DTR|TIOCM_RTS) ); tmp |= CMD8251_TxEN|CMD8251_RxEN; if ( msr & TIOCM_DTR ) tmp |= CMD8251_DTR; if ( msr & TIOCM_RTS ) tmp |= CMD8251_RTS; pc98_i8251_or_cmd( com, tmp ); splx(s); } static void com_tiocm_bic(struct com_s *com, int msr) { int s; int tmp = msr; s=spltty(); com->pc98_prev_modem_status &= ~( msr & (TIOCM_LE|TIOCM_DTR|TIOCM_RTS) ); if ( msr & TIOCM_DTR ) tmp |= CMD8251_DTR; if ( msr & TIOCM_RTS ) tmp |= CMD8251_RTS; pc98_i8251_clear_cmd( com, tmp ); splx(s); } static int com_tiocm_get(struct com_s *com) { return( com->pc98_prev_modem_status ); } static int com_tiocm_get_delta(struct com_s *com) { int tmp; tmp = com->pc98_modem_delta; com->pc98_modem_delta = 0; return( tmp ); } /* convert to TIOCM_?? ( ioctl.h ) */ static int pc98_get_modem_status(struct com_s *com) { int stat, stat2; register int msr; stat = inb(com->sts_port); stat2 = inb(com->in_modem_port); msr = com->pc98_prev_modem_status & ~(TIOCM_CAR|TIOCM_RI|TIOCM_DSR|TIOCM_CTS); if ( !(stat2 & CICSCD_CD) ) msr |= TIOCM_CAR; if ( !(stat2 & CICSCD_CI) ) msr |= TIOCM_RI; if ( stat & STS8251_DSR ) msr |= TIOCM_DSR; if ( !(stat2 & CICSCD_CS) ) msr |= TIOCM_CTS; #if COM_CARRIER_DETECT_EMULATE if ( msr & (TIOCM_DSR|TIOCM_CTS) ) { msr |= TIOCM_CAR; } #endif return(msr); } static void pc98_check_msr(void* chan) { int msr, delta; int s; register struct tty *tp; struct com_s *com; int mynor; int unit; dev_t dev; dev=(dev_t)chan; mynor = minor(dev); unit = MINOR_TO_UNIT(mynor); com = com_addr(unit); tp = com->tp; s = spltty(); msr = pc98_get_modem_status(com); /* make change flag */ delta = msr ^ com->pc98_prev_modem_status; if ( delta & TIOCM_CAR ) { if ( com->modem_car_chg_timer ) { if ( -- com->modem_car_chg_timer ) msr ^= TIOCM_CAR; } else { if ( com->modem_car_chg_timer = ( msr & TIOCM_CAR ) ? DCD_ON_RECOGNITION : DCD_OFF_TOLERANCE ) msr ^= TIOCM_CAR; } } else com->modem_car_chg_timer = 0; delta = ( msr ^ com->pc98_prev_modem_status ) & (TIOCM_CAR|TIOCM_RI|TIOCM_DSR|TIOCM_CTS); com->pc98_prev_modem_status = msr; delta = ( com->pc98_modem_delta |= delta ); splx(s); if ( com->modem_checking || (tp->t_state & (TS_ISOPEN)) ) { if ( delta ) { commint(dev); } timeout(pc98_check_msr, (caddr_t)dev, PC98_CHECK_MODEM_INTERVAL); } else { com->modem_checking = 0; } } static void pc98_msrint_start(dev_t dev) { struct com_s *com; int mynor; int unit; int s = spltty(); mynor = minor(dev); unit = MINOR_TO_UNIT(mynor); com = com_addr(unit); /* modem control line check routine envoke interval is 1/10 sec */ if ( com->modem_checking == 0 ) { com->pc98_prev_modem_status = pc98_get_modem_status(com); com->pc98_modem_delta = 0; timeout(pc98_check_msr, (caddr_t)dev, PC98_CHECK_MODEM_INTERVAL); com->modem_checking = 1; } splx(s); } static void pc98_disable_i8251_interrupt(struct com_s *com, int mod) { /* disable interrupt */ register int tmp; mod |= ~(IEN_Tx|IEN_TxEMP|IEN_Rx); COM_INT_DISABLE tmp = inb( com->intr_ctrl_port ) & ~(IEN_Tx|IEN_TxEMP|IEN_Rx); outb( com->intr_ctrl_port, (com->intr_enable&=~mod) | tmp ); COM_INT_ENABLE } static void pc98_enable_i8251_interrupt(struct com_s *com, int mod) { register int tmp; COM_INT_DISABLE tmp = inb( com->intr_ctrl_port ) & ~(IEN_Tx|IEN_TxEMP|IEN_Rx); outb( com->intr_ctrl_port, (com->intr_enable|=mod) | tmp ); COM_INT_ENABLE } static int pc98_check_i8251_interrupt(struct com_s *com) { return ( com->intr_enable & 0x07 ); } static void pc98_i8251_clear_cmd(struct com_s *com, int x) { int tmp; COM_INT_DISABLE tmp = com->pc98_prev_siocmd & ~(x); outb(com->cmd_port, tmp); com->pc98_prev_siocmd = tmp & ~(CMD8251_ER|CMD8251_RESET|CMD8251_EH); COM_INT_ENABLE } static void pc98_i8251_or_cmd(struct com_s *com, int x) { int tmp; COM_INT_DISABLE tmp = com->pc98_prev_siocmd | (x); outb(com->cmd_port, tmp); com->pc98_prev_siocmd = tmp & ~(CMD8251_ER|CMD8251_RESET|CMD8251_EH); COM_INT_ENABLE } static void pc98_i8251_set_cmd(struct com_s *com, int x) { int tmp; COM_INT_DISABLE tmp = (x); outb(com->cmd_port, tmp); com->pc98_prev_siocmd = tmp & ~(CMD8251_ER|CMD8251_RESET|CMD8251_EH); COM_INT_ENABLE } static void pc98_i8251_clear_or_cmd(struct com_s *com, int clr, int x) { int tmp; COM_INT_DISABLE tmp = com->pc98_prev_siocmd & ~(clr); tmp |= (x); outb(com->cmd_port, tmp); com->pc98_prev_siocmd = tmp & ~(CMD8251_ER|CMD8251_RESET|CMD8251_EH); COM_INT_ENABLE } static int pc98_i8251_get_cmd(struct com_s *com) { return com->pc98_prev_siocmd; } static int pc98_i8251_get_mod(struct com_s *com) { return com->pc98_prev_siomod; } static void pc98_i8251_reset(struct com_s *com, int mode, int command) { outb(com->cmd_port, 0); /* dummy */ DELAY(2); outb(com->cmd_port, 0); /* dummy */ DELAY(2); outb(com->cmd_port, 0); /* dummy */ DELAY(2); outb(com->cmd_port, CMD8251_RESET); /* internal reset */ DELAY(2); outb(com->cmd_port, mode ); /* mode register */ com->pc98_prev_siomod = mode; DELAY(2); pc98_i8251_set_cmd( com, (command|CMD8251_ER) ); } static void pc98_check_sysclock(void) { /* get system clock from port */ if ( pc98_machine_type & M_8M ) { /* 8 MHz system & H98 */ sysclock = 8; } else { /* 5 MHz system */ sysclock = 5; } } static void com_cflag_and_speed_set( struct com_s *com, int cflag, int speed) { int cfcr=0, count; int previnterrupt; count = pc98_ttspeedtab( com, speed ); if ( count < 0 ) return; previnterrupt = pc98_check_i8251_interrupt(com); pc98_disable_i8251_interrupt( com, IEN_Tx|IEN_TxEMP|IEN_Rx ); switch ( cflag&CSIZE ) { case CS5: cfcr = MOD8251_5BITS; break; case CS6: cfcr = MOD8251_6BITS; break; case CS7: cfcr = MOD8251_7BITS; break; case CS8: cfcr = MOD8251_8BITS; break; } if ( cflag&PARENB ) { if ( cflag&PARODD ) cfcr |= MOD8251_PODD; else cfcr |= MOD8251_PEVEN; } else cfcr |= MOD8251_PDISAB; if ( cflag&CSTOPB ) cfcr |= MOD8251_STOP2; else cfcr |= MOD8251_STOP1; if ( count & 0x10000 ) cfcr |= MOD8251_CLKX1; else cfcr |= MOD8251_CLKX16; if (epson_machine_id != 0x20) { /* XXX */ { int tmp; while (!((tmp = inb(com->sts_port)) & STS8251_TxEMP)) ; } } /* set baud rate from ospeed */ pc98_set_baud_rate( com, count ); if ( cfcr != pc98_i8251_get_mod(com) ) pc98_i8251_reset(com, cfcr, pc98_i8251_get_cmd(com) ); pc98_enable_i8251_interrupt( com, previnterrupt ); } static int pc98_ttspeedtab(struct com_s *com, int speed) { int effect_sp, count=-1, mod; switch ( com->pc98_if_type ) { case COM_IF_INTERNAL: /* for *1CLK asynchronous! mode , TEFUTEFU */ effect_sp = ttspeedtab( speed, pc98speedtab ); if ( effect_sp < 0 ) effect_sp = ttspeedtab( (speed-1), pc98speedtab ); if ( effect_sp <= 0 ) return effect_sp; mod = (sysclock == 5 ? 2457600 : 1996800); if ( effect_sp == speed ) mod /= 16; count = mod / effect_sp; if ( count > 65535 ) return(-1); if ( effect_sp >= 2400 ) if ( !(sysclock != 5 && (effect_sp == 19200 || effect_sp == 38400)) ) if ( ( mod % effect_sp ) != 0 ) return(-1); if ( effect_sp != speed ) count |= 0x10000; break; #ifdef COM_IF_PC9861K case COM_IF_PC9861K: effect_sp = speed; count = 1; break; #endif #ifdef COM_IF_PIO9032B case COM_IF_PIO9032B: if ( speed == 0 ) return 0; count = ttspeedtab( speed, comspeedtab_pio9032b ); if ( count < 0 ) return count; effect_sp = speed; break; #endif #ifdef COM_IF_B98_01 case COM_IF_B98_01: effect_sp=speed; count = ttspeedtab( speed, comspeedtab_b98_01 ); if ( count <= 3 ) return -1; /* invalid speed/count */ if ( count <= 5 ) count |= 0x10000; /* x1 mode for 76800 and 153600 */ else count -= 4; /* x16 mode for slower */ break; #endif } return count; } static void pc98_set_baud_rate( struct com_s *com, int count) { int s; switch ( com->pc98_if_type ) { case COM_IF_INTERNAL: if ( count < 0 ) { printf( "[ Illegal count : %d ]", count ); return; } else if ( count == 0) return; /* set i8253 */ s = splclock(); outb( 0x77, 0xb6 ); outb( 0x5f, 0); outb( 0x75, count & 0xff ); outb( 0x5f, 0); outb( 0x75, (count >> 8) & 0xff ); splx(s); break; #if 0 #ifdef COM_IF_PC9861K case COM_IF_PC9861K: break; /* ext. RS232C board: speed is determined by DIP switch */ #endif #endif /* 0 */ #ifdef COM_IF_PIO9032B case COM_IF_PIO9032B: outb( com_addr[unit], count & 0x07 ); break; #endif #ifdef COM_IF_B98_01 case COM_IF_B98_01: outb( com->iobase, count & 0x0f ); #ifdef B98_01_OLD /* some old board should be controlled in different way, but this hasn't been tested yet.*/ outb( com->iobase+2, ( count & 0x10000 ) ? 0xf0 : 0xf2 ); #endif break; #endif } } static int pc98_check_if_type( int iobase, struct siodev *iod) { int irr = 0, tmp = 0; int ret = 0; static short irq_tab[2][8] = { { 3, 5, 6, 9, 10, 12, 13, -1}, { 3, 10, 12, 13, 5, 6, 9, -1} }; iod->irq = 0; switch ( iobase & 0xff ) { case IO_COM1: iod->if_type = COM_IF_INTERNAL; ret = 0; iod->irq = 4; break; #ifdef COM_IF_PC9861K case IO_COM2: iod->if_type = COM_IF_PC9861K; ret = 1; irr = 0; tmp = 3; break; case IO_COM3: iod->if_type = COM_IF_PC9861K; ret = 2; irr = 1; tmp = 3; break; #endif #ifdef COM_IF_PIO9032B case IO_COM_PIO9032B_2: iod->if_type = COM_IF_PIO9032B; ret = 1; irr = 0; tmp = 7; break; case IO_COM_PIO9032B_3: iod->if_type = COM_IF_PIO9032B; ret = 2; irr = 1; tmp = 7; break; #endif #ifdef COM_IF_B98_01 case IO_COM_B98_01_2: iod->if_type = COM_IF_B98_01; ret = 1; irr = 0; tmp = 7; outb(iobase + 2, 0xf2); outb(iobase, 4); break; case IO_COM_B98_01_3: iod->if_type = COM_IF_B98_01; ret = 2; irr = 1; tmp = 7; outb(iobase + 2, 0xf2); outb(iobase , 4); break; #endif default: if((iobase & 0x0f0) == 0xd0){ iod->if_type = MC16550; return 0; } return -1; } iod->cmd = ( iobase & 0xff00 )|PC98SIO_cmd_port(ret); iod->sts = ( iobase & 0xff00 )|PC98SIO_sts_port(ret); iod->mod = ( iobase & 0xff00 )|PC98SIO_in_modem_port(ret); iod->ctrl = ( iobase & 0xff00 )|PC98SIO_intr_ctrl_port(ret); if ( iod->irq == 0 ) { tmp &= inb( iod->mod ); iod->irq = irq_tab[irr][tmp]; if ( iod->irq == -1 ) return -1; } return 0; } static int pc98_set_ioport( struct com_s *com, int io_base ) { int a, io, type; switch ( io_base & 0xff ) { case IO_COM1: a = 0; io = 0; type = COM_IF_INTERNAL; pc98_check_sysclock(); break; #ifdef COM_IF_PC9861K case IO_COM2: a = 1; io = 0; type = COM_IF_PC9861K; break; case IO_COM3: a = 2; io = 0; type = COM_IF_PC9861K; break; #endif /* COM_IF_PC9861K */ #ifdef COM_IF_PIO9032B /* PIO9032B : I/O address is changeable */ case IO_COM_PIO9032B_2: a = 1; io = io_base & 0xff00; type = COM_IF_PIO9032B; break; case IO_COM_PIO9032B_3: a = 2; io = io_base & 0xff00; type = COM_IF_PIO9032B; break; #endif /* COM_IF_PIO9032B */ #ifdef COM_IF_B98_01 case IO_COM_B98_01_2: a = 1; io = 0; type = COM_IF_B98_01; break; case IO_COM_B98_01_3: a = 2; io = 0; type = COM_IF_B98_01; break; #endif /* COM_IF_B98_01*/ default: /* i/o address not match */ return -1; } com->pc98_if_type = type; com->data_port = io | PC98SIO_data_port(a); com->cmd_port = io | PC98SIO_cmd_port(a); com->sts_port = io | PC98SIO_sts_port(a); com->in_modem_port = io | PC98SIO_in_modem_port(a); com->intr_ctrl_port = io | PC98SIO_intr_ctrl_port(a); return 0; } #endif /* PC98 defined */