2 * Copyright (c) 1991 The Regents of the University of California.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * from: @(#)com.c 7.5 (Berkeley) 5/16/91
31 * from: i386/isa sio.c,v 1.234
34 #include "opt_comconsole.h"
35 #include "opt_compat.h"
41 * Serial driver, based on 386BSD-0.1 com driver.
42 * Mostly rewritten to use pseudo-DMA.
43 * Works for National Semiconductor NS8250-NS16550AF UARTs.
44 * COM driver, based on HP dca driver.
46 * Changes for PC Card integration:
47 * - Added PC Card driver table and handlers
49 /*===============================================================
50 * 386BSD(98),FreeBSD-1.1x(98) com driver.
52 * modified for PC9801 by M.Ishii
53 * Kyoto University Microcomputer Club (KMC)
54 * Chou "TEFUTEFU" Hirotomi
55 * Kyoto Univ. the faculty of medicine
56 *===============================================================
57 * FreeBSD-2.0.1(98) sio driver.
59 * modified for pc98 Internal i8251 and MICRO CORE MC16550II
60 * T.Koike(hfc01340@niftyserve.or.jp)
61 * implement kernel device configuration
62 * aizu@orient.center.nitech.ac.jp
66 * PC98 localization based on 386BSD(98) com driver. Using its PC98 local
68 * This driver is under debugging,has bugs.
71 * modified for AIWA B98-01
72 * by T.Hatanou <hatanou@yasuda.comm.waseda.ac.jp> last update: 15 Sep.1995
75 * Modified by Y.Takahashi of Kogakuin University.
78 * modified for 8251(FIFO) by Seigo TANIMURA <tanimura@FreeBSD.org>
81 #include <sys/param.h>
82 #include <sys/systm.h>
85 #include <sys/fcntl.h>
86 #include <sys/interrupt.h>
88 #include <sys/kernel.h>
89 #include <sys/limits.h>
91 #include <sys/malloc.h>
92 #include <sys/module.h>
93 #include <sys/mutex.h>
95 #include <sys/reboot.h>
96 #include <sys/serial.h>
97 #include <sys/sysctl.h>
98 #include <sys/syslog.h>
100 #include <machine/bus.h>
101 #include <sys/rman.h>
102 #include <sys/timepps.h>
104 #include <sys/cons.h>
106 #include <isa/isavar.h>
108 #include <machine/resource.h>
110 #include <dev/sio/sioreg.h>
111 #include <dev/sio/siovar.h>
114 #include <pc98/cbus/cbus.h>
115 #include <pc98/pc98/pc98_machdep.h>
119 #include <dev/ic/esp.h>
121 #include <dev/ic/ns16550.h>
123 #include <dev/ic/i8251.h>
124 #include <dev/ic/rsa.h>
127 #define LOTS_OF_EVENTS 64 /* helps separate urgent events from input */
132 * 0x00000001 shared IRQs
133 * 0x00000002 disable FIFO
134 * 0x00000008 recover sooner from lost output interrupts
135 * 0x00000010 device is potential system console
136 * 0x00000020 device is forced to become system console
137 * 0x00000040 device is reserved for low-level IO
138 * 0x00000080 use this port for remote kernel debugging
139 * 0x0000??00 minor number of master port
140 * 0x00010000 PPS timestamping on CTS instead of DCD
141 * 0x00080000 IIR_TXRDY bug
142 * 0x00400000 If no comconsole found then mark as a comconsole
143 * 0x1?000000 interface type
147 /* checks in flags for multiport and which is multiport "master chip"
150 #define COM_ISMULTIPORT(flags) ((flags) & 0x01)
151 #define COM_MPMASTER(flags) (((flags) >> 8) & 0x0ff)
153 #define COM_NOTAST4(flags) ((flags) & 0x04)
156 #define COM_ISMULTIPORT(flags) (0)
157 #endif /* COM_MULTIPORT */
159 #define COM_C_IIR_TXRDYBUG 0x80000
160 #define COM_CONSOLE(flags) ((flags) & 0x10)
161 #define COM_DEBUGGER(flags) ((flags) & 0x80)
163 #define COM_FIFOSIZE(flags) (((flags) & 0xff000000) >> 24)
165 #define COM_FORCECONSOLE(flags) ((flags) & 0x20)
166 #define COM_IIR_TXRDYBUG(flags) ((flags) & COM_C_IIR_TXRDYBUG)
167 #define COM_LLCONSOLE(flags) ((flags) & 0x40)
168 #define COM_LOSESOUTINTS(flags) ((flags) & 0x08)
169 #define COM_NOFIFO(flags) ((flags) & 0x02)
171 #define COM_NOSCR(flags) ((flags) & 0x100000)
173 #define COM_PPSCTS(flags) ((flags) & 0x10000)
175 #define COM_ST16650A(flags) ((flags) & 0x20000)
176 #define COM_TI16754(flags) ((flags) & 0x200000)
179 #define sio_getreg(com, off) \
180 (bus_space_read_1((com)->bst, (com)->bsh, (off)))
181 #define sio_setreg(com, off, value) \
182 (bus_space_write_1((com)->bst, (com)->bsh, (off), (value)))
186 * (CS_BUSY | CS_TTGO) and (CS_BUSY | CS_TTGO | CS_ODEVREADY) must be higher
187 * than the other bits so that they can be tested as a group without masking
190 * The following com and tty flags correspond closely:
191 * CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and
193 * CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart())
194 * CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam())
195 * CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam())
196 * TS_FLUSH is not used.
197 * XXX I think TIOCSETA doesn't clear TS_TTSTOP when it clears IXON.
198 * XXX CS_*FLOW should be CF_*FLOW in com->flags (control flags not state).
200 #define CS_BUSY 0x80 /* output in progress */
201 #define CS_TTGO 0x40 /* output not stopped by XOFF */
202 #define CS_ODEVREADY 0x20 /* external device h/w ready (CTS) */
203 #define CS_CHECKMSR 1 /* check of MSR scheduled */
204 #define CS_CTS_OFLOW 2 /* use CTS output flow control */
205 #define CS_ODONE 4 /* output completed */
206 #define CS_RTS_IFLOW 8 /* use RTS input flow control */
207 #define CSE_BUSYCHECK 1 /* siobusycheck() scheduled */
209 static char const * const error_desc[] = {
212 #define CE_INTERRUPT_BUF_OVERFLOW 1
213 "interrupt-level buffer overflow",
214 #define CE_TTY_BUF_OVERFLOW 2
215 "tty-level buffer overflow",
219 #define CE_RECORD(com, errnum) (++(com)->delta_error_counts[errnum])
221 /* types. XXX - should be elsewhere */
222 typedef u_int Port_t; /* hardware port */
223 typedef u_char bool_t; /* boolean */
225 /* queue of linear buffers */
227 u_char *l_head; /* next char to process */
228 u_char *l_tail; /* one past the last char to process */
229 struct lbq *l_next; /* next in queue */
230 bool_t l_queued; /* nonzero if queued */
233 /* com device structure */
235 u_char state; /* miscellaneous flag bits */
236 u_char cfcr_image; /* copy of value written to CFCR */
238 bool_t esp; /* is this unit a hayes esp board? */
240 u_char extra_state; /* more flag bits, separate for order trick */
241 u_char fifo_image; /* copy of value written to FIFO */
242 bool_t hasfifo; /* nonzero for 16550 UARTs */
243 bool_t loses_outints; /* nonzero if device loses output interrupts */
244 u_char mcr_image; /* copy of value written to MCR */
246 bool_t multiport; /* is this unit part of a multiport device? */
247 #endif /* COM_MULTIPORT */
248 bool_t no_irq; /* nonzero if irq is not attached */
249 bool_t gone; /* hardware disappeared */
250 bool_t poll; /* nonzero if polling is required */
251 bool_t poll_output; /* nonzero if polling for output is required */
252 bool_t st16650a; /* nonzero if Startech 16650A compatible */
253 int unit; /* unit number */
254 u_int flags; /* copy of device flags */
258 * The high level of the driver never reads status registers directly
259 * because there would be too many side effects to handle conveniently.
260 * Instead, it reads copies of the registers stored here by the
263 u_char last_modem_status; /* last MSR read by intr handler */
264 u_char prev_modem_status; /* last MSR handled by high level */
266 u_char *ibuf; /* start of input buffer */
267 u_char *ibufend; /* end of input buffer */
268 u_char *ibufold; /* old input buffer, to be freed */
269 u_char *ihighwater; /* threshold in input buffer */
270 u_char *iptr; /* next free spot in input buffer */
271 int ibufsize; /* size of ibuf (not include error bytes) */
272 int ierroff; /* offset of error bytes in ibuf */
274 struct lbq obufq; /* head of queue of output buffers */
275 struct lbq obufs[2]; /* output buffers */
278 bus_space_handle_t bsh;
283 Port_t in_modem_port;
284 Port_t intr_ctrl_port;
285 Port_t rsabase; /* Iobase address of an I/O-DATA RSA board. */
287 int pc98_prev_modem_status;
288 int pc98_modem_delta;
289 int modem_car_chg_timer;
290 int pc98_prev_siocmd;
291 int pc98_prev_siomod;
295 bool_t pc98_8251fifo;
296 bool_t pc98_8251fifo_enable;
298 Port_t data_port; /* i/o ports */
304 Port_t modem_ctl_port;
305 Port_t line_status_port;
306 Port_t modem_status_port;
308 struct tty *tp; /* cross reference */
310 struct pps_state pps;
312 #ifdef ALT_BREAK_TO_DEBUGGER
316 u_long bytes_in; /* statistics */
318 u_int delta_error_counts[CE_NTYPES];
319 u_long error_counts[CE_NTYPES];
323 struct resource *irqres;
324 struct resource *ioportres;
329 * Data area for output buffers. Someday we should build the output
330 * buffer queue without copying data.
343 static int espattach(struct com_s *com, Port_t esp_port);
346 static void combreak(struct tty *tp, int sig);
347 static timeout_t siobusycheck;
348 static u_int siodivisor(u_long rclk, speed_t speed);
349 static void comclose(struct tty *tp);
350 static int comopen(struct tty *tp, struct cdev *dev);
351 static void sioinput(struct com_s *com);
352 static void siointr1(struct com_s *com);
353 static void siointr(void *arg);
354 static int commodem(struct tty *tp, int sigon, int sigoff);
355 static int comparam(struct tty *tp, struct termios *t);
356 static void siopoll(void *);
357 static void siosettimeout(void);
358 static int siosetwater(struct com_s *com, speed_t speed);
359 static void comstart(struct tty *tp);
360 static void comstop(struct tty *tp, int rw);
361 static timeout_t comwakeup;
363 char sio_driver_name[] = "sio";
364 static struct mtx sio_lock;
365 static int sio_inited;
367 /* table and macro for fast conversion from a unit number to its com struct */
368 devclass_t sio_devclass;
369 #define com_addr(unit) ((struct com_s *) \
370 devclass_get_softc(sio_devclass, unit)) /* XXX */
373 static volatile speed_t comdefaultrate = CONSPEED;
374 static u_long comdefaultrclk = DEFAULT_RCLK;
375 SYSCTL_ULONG(_machdep, OID_AUTO, conrclk, CTLFLAG_RW, &comdefaultrclk, 0, "");
376 static speed_t gdbdefaultrate = GDBSPEED;
377 SYSCTL_UINT(_machdep, OID_AUTO, gdbspeed, CTLFLAG_RW,
378 &gdbdefaultrate, GDBSPEED, "");
379 static u_int com_events; /* input chars + weighted output completions */
380 static Port_t siocniobase;
381 static int siocnunit = -1;
382 static void *sio_slow_ih;
383 static void *sio_fast_ih;
384 static int sio_timeout;
385 static int sio_timeouts_until_log;
386 static struct callout_handle sio_timeout_handle
387 = CALLOUT_HANDLE_INITIALIZER(&sio_timeout_handle);
388 static int sio_numunits;
394 Port_t cmd, sts, ctrl, mod;
398 #define COM_INT_DISABLE {int previpri; previpri=spltty();
399 #define COM_INT_ENABLE splx(previpri);}
400 #define IEN_TxFLAG IEN_Tx
402 #define COM_CARRIER_DETECT_EMULATE 0
403 #define PC98_CHECK_MODEM_INTERVAL (hz/10)
404 #define DCD_OFF_TOLERANCE 2
405 #define DCD_ON_RECOGNITION 2
406 #define IS_8251(if_type) (!(if_type & 0x10))
407 #define COM1_EXT_CLOCK 0x40000
409 static void commint(struct cdev *dev);
410 static void com_tiocm_bis(struct com_s *com, int msr);
411 static void com_tiocm_bic(struct com_s *com, int msr);
412 static int com_tiocm_get(struct com_s *com);
413 static int com_tiocm_get_delta(struct com_s *com);
414 static void pc98_msrint_start(struct cdev *dev);
415 static void com_cflag_and_speed_set(struct com_s *com, int cflag, int speed);
416 static int pc98_ttspeedtab(struct com_s *com, int speed, u_int *divisor);
417 static int pc98_get_modem_status(struct com_s *com);
418 static timeout_t pc98_check_msr;
419 static void pc98_set_baud_rate(struct com_s *com, u_int count);
420 static void pc98_i8251_reset(struct com_s *com, int mode, int command);
421 static void pc98_disable_i8251_interrupt(struct com_s *com, int mod);
422 static void pc98_enable_i8251_interrupt(struct com_s *com, int mod);
423 static int pc98_check_i8251_interrupt(struct com_s *com);
424 static int pc98_i8251_get_cmd(struct com_s *com);
425 static int pc98_i8251_get_mod(struct com_s *com);
426 static void pc98_i8251_set_cmd(struct com_s *com, int x);
427 static void pc98_i8251_or_cmd(struct com_s *com, int x);
428 static void pc98_i8251_clear_cmd(struct com_s *com, int x);
429 static void pc98_i8251_clear_or_cmd(struct com_s *com, int clr, int x);
430 static int pc98_check_if_type(device_t dev, struct siodev *iod);
431 static int pc98_check_8251vfast(void);
432 static int pc98_check_8251fifo(void);
433 static void pc98_check_sysclock(void);
434 static void pc98_set_ioport(struct com_s *com);
436 #define com_int_Tx_disable(com) \
437 pc98_disable_i8251_interrupt(com,IEN_Tx|IEN_TxEMP)
438 #define com_int_Tx_enable(com) \
439 pc98_enable_i8251_interrupt(com,IEN_TxFLAG)
440 #define com_int_Rx_disable(com) \
441 pc98_disable_i8251_interrupt(com,IEN_Rx)
442 #define com_int_Rx_enable(com) \
443 pc98_enable_i8251_interrupt(com,IEN_Rx)
444 #define com_int_TxRx_disable(com) \
445 pc98_disable_i8251_interrupt(com,IEN_Tx|IEN_TxEMP|IEN_Rx)
446 #define com_int_TxRx_enable(com) \
447 pc98_enable_i8251_interrupt(com,IEN_TxFLAG|IEN_Rx)
448 #define com_send_break_on(com) \
449 (IS_8251((com)->pc98_if_type) ? \
450 pc98_i8251_or_cmd((com), CMD8251_SBRK) : \
451 sio_setreg((com), com_cfcr, (com)->cfcr_image |= CFCR_SBREAK))
452 #define com_send_break_off(com) \
453 (IS_8251((com)->pc98_if_type) ? \
454 pc98_i8251_clear_cmd((com), CMD8251_SBRK) : \
455 sio_setreg((com), com_cfcr, (com)->cfcr_image &= ~CFCR_SBREAK))
457 static struct speedtab pc98speedtab[] = { /* internal RS232C interface */
479 static struct speedtab pc98fast_speedtab[] = {
480 { 9600, 0x80 | (DEFAULT_RCLK / (16 * (9600))), },
481 { 19200, 0x80 | (DEFAULT_RCLK / (16 * (19200))), },
482 { 38400, 0x80 | (DEFAULT_RCLK / (16 * (38400))), },
483 { 57600, 0x80 | (DEFAULT_RCLK / (16 * (57600))), },
484 { 115200, 0x80 | (DEFAULT_RCLK / (16 * (115200))), },
487 static struct speedtab comspeedtab_pio9032b[] = {
498 static struct speedtab comspeedtab_b98_01[] = {
513 static struct speedtab comspeedtab_ind[] = {
534 struct speedtab *speedtab;
537 /* COM_IF_INTERNAL */
538 { " (internal)", {0x30, 0x32, 0x32, 0x33, 0x35, -1, -1},
539 -1, pc98speedtab, 1 },
540 /* COM_IF_PC9861K_1 */
541 { " (PC9861K)", {0xb1, 0xb3, 0xb3, 0xb0, 0xb0, -1, -1},
543 /* COM_IF_PC9861K_2 */
544 { " (PC9861K)", {0xb9, 0xbb, 0xbb, 0xb2, 0xb2, -1, -1},
546 /* COM_IF_IND_SS_1 */
547 { " (IND-SS)", {0xb1, 0xb3, 0xb3, 0xb0, 0xb0, 0xb3, -1},
548 3, comspeedtab_ind, 1 },
549 /* COM_IF_IND_SS_2 */
550 { " (IND-SS)", {0xb9, 0xbb, 0xbb, 0xb2, 0xb2, 0xbb, -1},
551 3, comspeedtab_ind, 1 },
552 /* COM_IF_PIO9032B_1 */
553 { " (PIO9032B)", {0xb1, 0xb3, 0xb3, 0xb0, 0xb0, 0xb8, -1},
554 7, comspeedtab_pio9032b, 1 },
555 /* COM_IF_PIO9032B_2 */
556 { " (PIO9032B)", {0xb9, 0xbb, 0xbb, 0xb2, 0xb2, 0xba, -1},
557 7, comspeedtab_pio9032b, 1 },
558 /* COM_IF_B98_01_1 */
559 { " (B98-01)", {0xb1, 0xb3, 0xb3, 0xb0, 0xb0, 0xd1, 0xd3},
560 7, comspeedtab_b98_01, 0 },
561 /* COM_IF_B98_01_2 */
562 { " (B98-01)", {0xb9, 0xbb, 0xbb, 0xb2, 0xb2, 0xd5, 0xd7},
563 7, comspeedtab_b98_01, 0 },
565 #define PC98SIO_data_port(type) (if_8251_type[type].port_table[0])
566 #define PC98SIO_cmd_port(type) (if_8251_type[type].port_table[1])
567 #define PC98SIO_sts_port(type) (if_8251_type[type].port_table[2])
568 #define PC98SIO_in_modem_port(type) (if_8251_type[type].port_table[3])
569 #define PC98SIO_intr_ctrl_port(type) (if_8251_type[type].port_table[4])
570 #define PC98SIO_baud_rate_port(type) (if_8251_type[type].port_table[5])
571 #define PC98SIO_func_port(type) (if_8251_type[type].port_table[6])
573 #define I8251F_data 0x130
574 #define I8251F_lsr 0x132
575 #define I8251F_msr 0x134
576 #define I8251F_iir 0x136
577 #define I8251F_fcr 0x138
578 #define I8251F_div 0x13a
581 static bus_addr_t port_table_0[] =
582 {0x000, 0x001, 0x002, 0x003, 0x004, 0x005, 0x006, 0x007};
583 static bus_addr_t port_table_1[] =
584 {0x000, 0x002, 0x004, 0x006, 0x008, 0x00a, 0x00c, 0x00e};
585 static bus_addr_t port_table_8[] =
586 {0x000, 0x100, 0x200, 0x300, 0x400, 0x500, 0x600, 0x700};
587 static bus_addr_t port_table_rsa[] = {
588 0x008, 0x009, 0x00a, 0x00b, 0x00c, 0x00d, 0x00e, 0x00f,
589 0x000, 0x001, 0x002, 0x003, 0x004, 0x005, 0x006, 0x007
599 } if_16550a_type[] = {
601 {" (RSA-98)", -1, -1, port_table_0, IO_COMSIZE, DEFAULT_RCLK},
603 {"", -1, -1, port_table_0, IO_COMSIZE, DEFAULT_RCLK},
604 /* COM_IF_SECOND_CCU */
605 {"", -1, -1, port_table_0, IO_COMSIZE, DEFAULT_RCLK},
606 /* COM_IF_MC16550II */
607 {" (MC16550II)", -1, 0x1000, port_table_8, IO_COMSIZE,
610 {" (MC-RS98)", -1, 0x1000, port_table_8, IO_COMSIZE, DEFAULT_RCLK * 4},
612 {" (RSB-3000)", 0xbf, -1, port_table_1, IO_COMSIZE, DEFAULT_RCLK * 10},
614 {" (RSB-384)", 0xbf, -1, port_table_1, IO_COMSIZE, DEFAULT_RCLK * 10},
615 /* COM_IF_MODEM_CARD */
616 {"", -1, -1, port_table_0, IO_COMSIZE, DEFAULT_RCLK},
617 /* COM_IF_RSA98III */
618 {" (RSA-98III)", -1, -1, port_table_rsa, 16, DEFAULT_RCLK * 8},
620 {" (ESP98)", -1, -1, port_table_1, IO_COMSIZE, DEFAULT_RCLK * 4},
625 static Port_t siogdbiobase = 0;
631 /* XXX configure this properly. */
632 /* XXX quite broken for new-bus. */
633 static Port_t likely_com_ports[] = { 0, 0xb0, 0xb1, 0 };
634 static Port_t likely_esp_ports[] = { 0xc0d0, 0 };
636 #define ESP98_CMD1 (ESP_CMD1 * 0x100)
637 #define ESP98_CMD2 (ESP_CMD2 * 0x100)
638 #define ESP98_STATUS1 (ESP_STATUS1 * 0x100)
639 #define ESP98_STATUS2 (ESP_STATUS2 * 0x100)
643 /* XXX configure this properly. */
644 static Port_t likely_com_ports[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, };
645 static Port_t likely_esp_ports[] = { 0x140, 0x180, 0x280, 0 };
651 * handle sysctl read/write requests for console speed
653 * In addition to setting comdefaultrate for I/O through /dev/console,
654 * also set the initial and lock values for the /dev/ttyXX device
655 * if there is one associated with the console. Finally, if the /dev/tty
656 * device has already been open, change the speed on the open running port
661 sysctl_machdep_comdefaultrate(SYSCTL_HANDLER_ARGS)
668 newspeed = comdefaultrate;
670 error = sysctl_handle_opaque(oidp, &newspeed, sizeof newspeed, req);
671 if (error || !req->newptr)
674 comdefaultrate = newspeed;
676 if (comconsole < 0) /* serial console not selected? */
679 com = com_addr(comconsole);
688 * set the initial and lock rates for /dev/ttydXX and /dev/cuaXX
689 * (note, the lock rates really are boolean -- if non-zero, disallow
692 tp->t_init_in.c_ispeed = tp->t_init_in.c_ospeed =
693 tp->t_lock_in.c_ispeed = tp->t_lock_in.c_ospeed =
694 tp->t_init_out.c_ispeed = tp->t_init_out.c_ospeed =
695 tp->t_lock_out.c_ispeed = tp->t_lock_out.c_ospeed = comdefaultrate;
697 if (tp->t_state & TS_ISOPEN) {
698 tp->t_termios.c_ispeed =
699 tp->t_termios.c_ospeed = comdefaultrate;
701 error = comparam(tp, &tp->t_termios);
707 SYSCTL_PROC(_machdep, OID_AUTO, conspeed, CTLTYPE_INT | CTLFLAG_RW,
708 0, 0, sysctl_machdep_comdefaultrate, "I", "");
709 TUNABLE_INT("machdep.conspeed", __DEVOLATILE(int *, &comdefaultrate));
712 * Unload the driver and clear the table.
713 * XXX this is mostly wrong.
715 * This is usually called when the card is ejected, but
716 * can be caused by a kldunload of a controller driver.
717 * The idea is to reset the driver's view of the device
718 * and ensure that any driver entry points such as
719 * read and write do not hang.
722 siodetach(device_t dev)
726 com = (struct com_s *) device_get_softc(dev);
728 device_printf(dev, "NULL com in siounload\n");
735 bus_teardown_intr(dev, com->irqres, com->cookie);
736 bus_release_resource(dev, SYS_RES_IRQ, 0, com->irqres);
739 bus_release_resource(dev, SYS_RES_IOPORT, com->ioportrid,
741 if (com->ibuf != NULL)
742 free(com->ibuf, M_DEVBUF);
744 if (com->obuf1 != NULL)
745 free(com->obuf1, M_DEVBUF);
748 device_set_softc(dev, NULL);
754 sioprobe(dev, xrid, rclk, noprobe)
761 static bool_t already_init;
770 intrmask_t irqmap[4];
775 u_int flags = device_get_flags(dev);
777 struct resource *port;
784 iod.if_type = GET_IFTYPE(flags);
785 if ((iod.if_type < 0 || iod.if_type > COM_IF_END1) &&
786 (iod.if_type < 0x10 || iod.if_type > COM_IF_END2))
792 if (IS_8251(iod.if_type)) {
793 port = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid,
795 } else if (iod.if_type == COM_IF_MODEM_CARD ||
796 iod.if_type == COM_IF_RSA98III ||
797 isa_get_vendorid(dev)) {
798 port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0,
799 if_16550a_type[iod.if_type & 0x0f].iatsz, RF_ACTIVE);
801 port = isa_alloc_resourcev(dev, SYS_RES_IOPORT, &rid,
802 if_16550a_type[iod.if_type & 0x0f].iat,
803 if_16550a_type[iod.if_type & 0x0f].iatsz, RF_ACTIVE);
806 port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
807 0, ~0, IO_COMSIZE, RF_ACTIVE);
812 if (!IS_8251(iod.if_type)) {
813 if (isa_load_resourcev(port,
814 if_16550a_type[iod.if_type & 0x0f].iat,
815 if_16550a_type[iod.if_type & 0x0f].iatsz) != 0) {
816 bus_release_resource(dev, SYS_RES_IOPORT, rid, port);
822 com = malloc(sizeof(*com), M_DEVBUF, M_NOWAIT | M_ZERO);
824 bus_release_resource(dev, SYS_RES_IOPORT, rid, port);
827 device_set_softc(dev, com);
828 com->bst = rman_get_bustag(port);
829 com->bsh = rman_get_bushandle(port);
831 if (!IS_8251(iod.if_type) && rclk == 0)
832 rclk = if_16550a_type[iod.if_type & 0x0f].rclk;
839 while (sio_inited != 2)
840 if (atomic_cmpset_int(&sio_inited, 0, 1)) {
841 mtx_init(&sio_lock, sio_driver_name, NULL,
843 MTX_SPIN | MTX_QUIET : MTX_SPIN);
844 atomic_store_rel_int(&sio_inited, 2);
849 * XXX this is broken - when we are first called, there are no
850 * previously configured IO ports. We could hard code
851 * 0x3f8, 0x2f8, 0x3e8, 0x2e8 etc but that's probably worse.
852 * This code has been doing nothing since the conversion since
853 * "count" is zero the first time around.
857 * Turn off MCR_IENABLE for all likely serial ports. An unused
858 * port with its MCR_IENABLE gate open will inhibit interrupts
859 * from any used port that shares the interrupt vector.
860 * XXX the gate enable is elsewhere for some multiports.
863 int count, i, xioport;
868 devclass_get_devices(sio_devclass, &devs, &count);
870 for (i = 0; i < count; i++) {
872 xioport = bus_get_resource_start(xdev, SYS_RES_IOPORT, 0);
873 xiftype = GET_IFTYPE(device_get_flags(xdev));
874 if (device_is_enabled(xdev) && xioport > 0) {
875 if (IS_8251(xiftype))
876 outb((xioport & 0xff00) | PC98SIO_cmd_port(xiftype & 0x0f), 0xf2);
878 outb(xioport + if_16550a_type[xiftype & 0x0f].iat[com_mcr], 0);
882 for (i = 0; i < count; i++) {
884 if (device_is_enabled(xdev) &&
885 bus_get_resource(xdev, SYS_RES_IOPORT, 0, &xioport,
887 outb(xioport + com_mcr, 0);
895 if (COM_LLCONSOLE(flags)) {
896 printf("sio%d: reserved for low-level i/o\n",
897 device_get_unit(dev));
898 bus_release_resource(dev, SYS_RES_IOPORT, rid, port);
899 device_set_softc(dev, NULL);
908 * If the port is i8251 UART (internal, B98_01)
910 if (pc98_check_if_type(dev, &iod) == -1) {
911 bus_release_resource(dev, SYS_RES_IOPORT, rid, port);
912 device_set_softc(dev, NULL);
917 bus_set_resource(dev, SYS_RES_IRQ, 0, iod.irq, 1);
918 if (IS_8251(iod.if_type)) {
925 outb(iod.cmd, CMD8251_RESET);
926 DELAY(1000); /* for a while...*/
927 outb(iod.cmd, 0xf2); /* MODE (dummy) */
929 outb(iod.cmd, 0x01); /* CMD (dummy) */
930 DELAY(1000); /* for a while...*/
931 if (( inb(iod.sts) & STS8251_TxEMP ) == 0 ) {
934 if (if_8251_type[iod.if_type & 0x0f].check_irq) {
936 tmp = ( inb( iod.ctrl ) & ~(IEN_Rx|IEN_TxEMP|IEN_Tx));
937 outb( iod.ctrl, tmp|IEN_TxEMP );
939 result = isa_irq_pending() ? 0 : ENXIO;
940 outb( iod.ctrl, tmp );
944 * B98_01 doesn't activate TxEMP interrupt line
945 * when being reset, so we can't check irq pending.
949 bus_release_resource(dev, SYS_RES_IOPORT, rid, port);
951 device_set_softc(dev, NULL);
958 * If the device is on a multiport card and has an AST/4
959 * compatible interrupt control register, initialize this
960 * register and prepare to leave MCR_IENABLE clear in the mcr.
961 * Otherwise, prepare to set MCR_IENABLE in the mcr.
962 * Point idev to the device struct giving the correct id_irq.
963 * This is the struct for the master device if there is one.
966 mcr_image = MCR_IENABLE;
968 if (COM_ISMULTIPORT(flags)) {
974 idev = devclass_get_device(sio_devclass, COM_MPMASTER(flags));
976 printf("sio%d: master device %d not configured\n",
977 device_get_unit(dev), COM_MPMASTER(flags));
981 if (!COM_NOTAST4(flags)) {
982 if (bus_get_resource(idev, SYS_RES_IOPORT, 0, &io,
985 if (bus_get_resource(idev, SYS_RES_IRQ, 0,
987 outb(xiobase + com_scr, 0x80);
989 outb(xiobase + com_scr, 0);
995 #endif /* COM_MULTIPORT */
996 if (bus_get_resource(idev, SYS_RES_IRQ, 0, NULL, NULL) != 0)
999 bzero(failures, sizeof failures);
1000 iobase = rman_get_start(port);
1003 if (iod.if_type == COM_IF_RSA98III) {
1006 outb(iobase + rsa_msr, 0x04);
1007 outb(iobase + rsa_frr, 0x00);
1008 if ((inb(iobase + rsa_srr) & 0x36) != 0x36) {
1009 bus_release_resource(dev, SYS_RES_IOPORT, rid, port);
1010 device_set_softc(dev, NULL);
1011 free(com, M_DEVBUF);
1014 outb(iobase + rsa_ier, 0x00);
1015 outb(iobase + rsa_frr, 0x00);
1016 outb(iobase + rsa_tivsr, 0x00);
1017 outb(iobase + rsa_tcr, 0x00);
1020 tmp = if_16550a_type[iod.if_type & 0x0f].irr_write;
1024 switch (isa_get_irq(idev)) {
1025 case 3: irqout = 4; break;
1026 case 5: irqout = 5; break;
1027 case 6: irqout = 6; break;
1028 case 12: irqout = 7; break;
1030 printf("sio%d: irq configuration error\n",
1031 device_get_unit(dev));
1032 bus_release_resource(dev, SYS_RES_IOPORT, rid, port);
1033 device_set_softc(dev, NULL);
1034 free(com, M_DEVBUF);
1037 outb((iobase & 0x00ff) | tmp, irqout);
1042 * We don't want to get actual interrupts, just masked ones.
1043 * Interrupts from this line should already be masked in the ICU,
1044 * but mask them in the processor as well in case there are some
1045 * (misconfigured) shared interrupts.
1047 mtx_lock_spin(&sio_lock);
1051 * Initialize the speed and the word size and wait long enough to
1052 * drain the maximum of 16 bytes of junk in device output queues.
1053 * The speed is undefined after a master reset and must be set
1054 * before relying on anything related to output. There may be
1055 * junk after a (very fast) soft reboot and (apparently) after
1057 * XXX what about the UART bug avoided by waiting in comparam()?
1058 * We don't want to to wait long enough to drain at 2 bps.
1060 if (iobase == siocniobase)
1061 DELAY((16 + 1) * 1000000 / (comdefaultrate / 10));
1063 sio_setreg(com, com_cfcr, CFCR_DLAB | CFCR_8BITS);
1064 divisor = siodivisor(rclk, SIO_TEST_SPEED);
1065 sio_setreg(com, com_dlbl, divisor & 0xff);
1066 sio_setreg(com, com_dlbh, divisor >> 8);
1067 sio_setreg(com, com_cfcr, CFCR_8BITS);
1068 DELAY((16 + 1) * 1000000 / (SIO_TEST_SPEED / 10));
1072 * Enable the interrupt gate and disable device interupts. This
1073 * should leave the device driving the interrupt line low and
1074 * guarantee an edge trigger if an interrupt can be generated.
1077 sio_setreg(com, com_mcr, mcr_image);
1078 sio_setreg(com, com_ier, 0);
1079 DELAY(1000); /* XXX */
1080 irqmap[0] = isa_irq_pending();
1083 * Attempt to set loopback mode so that we can send a null byte
1084 * without annoying any external device.
1087 sio_setreg(com, com_mcr, mcr_image | MCR_LOOPBACK);
1090 * Attempt to generate an output interrupt. On 8250's, setting
1091 * IER_ETXRDY generates an interrupt independent of the current
1092 * setting and independent of whether the THR is empty. On 16450's,
1093 * setting IER_ETXRDY generates an interrupt independent of the
1094 * current setting. On 16550A's, setting IER_ETXRDY only
1095 * generates an interrupt when IER_ETXRDY is not already set.
1097 sio_setreg(com, com_ier, IER_ETXRDY);
1099 if (iod.if_type == COM_IF_RSA98III)
1100 outb(iobase + rsa_ier, 0x04);
1104 * On some 16x50 incompatibles, setting IER_ETXRDY doesn't generate
1105 * an interrupt. They'd better generate one for actually doing
1106 * output. Loopback may be broken on the same incompatibles but
1107 * it's unlikely to do more than allow the null byte out.
1109 sio_setreg(com, com_data, 0);
1110 if (iobase == siocniobase)
1111 DELAY((1 + 2) * 1000000 / (comdefaultrate / 10));
1113 DELAY((1 + 2) * 1000000 / (SIO_TEST_SPEED / 10));
1116 * Turn off loopback mode so that the interrupt gate works again
1117 * (MCR_IENABLE was hidden). This should leave the device driving
1118 * an interrupt line high. It doesn't matter if the interrupt
1119 * line oscillates while we are not looking at it, since interrupts
1123 sio_setreg(com, com_mcr, mcr_image);
1126 * It seems my Xircom CBEM56G Cardbus modem wants to be reset
1127 * to 8 bits *again*, or else probe test 0 will fail.
1128 * gwk@sgi.com, 4/19/2001
1130 sio_setreg(com, com_cfcr, CFCR_8BITS);
1133 * Some PCMCIA cards (Palido 321s, DC-1S, ...) have the "TXRDY bug",
1134 * so we probe for a buggy IIR_TXRDY implementation even in the
1135 * noprobe case. We don't probe for it in the !noprobe case because
1136 * noprobe is always set for PCMCIA cards and the problem is not
1137 * known to affect any other cards.
1140 /* Read IIR a few times. */
1141 for (fn = 0; fn < 2; fn ++) {
1143 failures[6] = sio_getreg(com, com_iir);
1146 /* IIR_TXRDY should be clear. Is it? */
1148 if (failures[6] & IIR_TXRDY) {
1150 * No. We seem to have the bug. Does our fix for
1153 sio_setreg(com, com_ier, 0);
1154 if (sio_getreg(com, com_iir) & IIR_NOPEND) {
1155 /* Yes. We discovered the TXRDY bug! */
1156 SET_FLAG(dev, COM_C_IIR_TXRDYBUG);
1158 /* No. Just fail. XXX */
1160 sio_setreg(com, com_mcr, 0);
1164 CLR_FLAG(dev, COM_C_IIR_TXRDYBUG);
1166 sio_setreg(com, com_ier, 0);
1167 sio_setreg(com, com_cfcr, CFCR_8BITS);
1168 mtx_unlock_spin(&sio_lock);
1169 bus_release_resource(dev, SYS_RES_IOPORT, rid, port);
1170 if (iobase == siocniobase)
1173 device_set_softc(dev, NULL);
1174 free(com, M_DEVBUF);
1181 * o the CFCR, IER and MCR in UART hold the values written to them
1182 * (the values happen to be all distinct - this is good for
1183 * avoiding false positive tests from bus echoes).
1184 * o an output interrupt is generated and its vector is correct.
1185 * o the interrupt goes away when the IIR in the UART is read.
1188 failures[0] = sio_getreg(com, com_cfcr) - CFCR_8BITS;
1189 failures[1] = sio_getreg(com, com_ier) - IER_ETXRDY;
1190 failures[2] = sio_getreg(com, com_mcr) - mcr_image;
1191 DELAY(10000); /* Some internal modems need this time */
1192 irqmap[1] = isa_irq_pending();
1193 failures[4] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_TXRDY;
1195 if (iod.if_type == COM_IF_RSA98III)
1196 inb(iobase + rsa_srr);
1198 DELAY(1000); /* XXX */
1199 irqmap[2] = isa_irq_pending();
1200 failures[6] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND;
1202 if (iod.if_type == COM_IF_RSA98III)
1203 inb(iobase + rsa_srr);
1207 * Turn off all device interrupts and check that they go off properly.
1208 * Leave MCR_IENABLE alone. For ports without a master port, it gates
1209 * the OUT2 output of the UART to
1210 * the ICU input. Closing the gate would give a floating ICU input
1211 * (unless there is another device driving it) and spurious interrupts.
1212 * (On the system that this was first tested on, the input floats high
1213 * and gives a (masked) interrupt as soon as the gate is closed.)
1215 sio_setreg(com, com_ier, 0);
1216 sio_setreg(com, com_cfcr, CFCR_8BITS); /* dummy to avoid bus echo */
1217 failures[7] = sio_getreg(com, com_ier);
1219 if (iod.if_type == COM_IF_RSA98III)
1220 outb(iobase + rsa_ier, 0x00);
1222 DELAY(1000); /* XXX */
1223 irqmap[3] = isa_irq_pending();
1224 failures[9] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND;
1226 if (iod.if_type == COM_IF_RSA98III) {
1227 inb(iobase + rsa_srr);
1228 outb(iobase + rsa_frr, 0x00);
1232 mtx_unlock_spin(&sio_lock);
1234 irqs = irqmap[1] & ~irqmap[0];
1235 if (bus_get_resource(idev, SYS_RES_IRQ, 0, &xirq, NULL) == 0 &&
1236 ((1 << xirq) & irqs) == 0) {
1238 "sio%d: configured irq %ld not in bitmap of probed irqs %#x\n",
1239 device_get_unit(dev), xirq, irqs);
1241 "sio%d: port may not be enabled\n",
1242 device_get_unit(dev));
1245 printf("sio%d: irq maps: %#x %#x %#x %#x\n",
1246 device_get_unit(dev),
1247 irqmap[0], irqmap[1], irqmap[2], irqmap[3]);
1250 for (fn = 0; fn < sizeof failures; ++fn)
1252 sio_setreg(com, com_mcr, 0);
1255 printf("sio%d: probe failed test(s):",
1256 device_get_unit(dev));
1257 for (fn = 0; fn < sizeof failures; ++fn)
1264 bus_release_resource(dev, SYS_RES_IOPORT, rid, port);
1265 if (iobase == siocniobase)
1268 device_set_softc(dev, NULL);
1269 free(com, M_DEVBUF);
1276 espattach(com, esp_port)
1284 * Check the ESP-specific I/O port to see if we're an ESP
1285 * card. If not, return failure immediately.
1287 if ((inb(esp_port) & 0xf3) == 0) {
1288 printf(" port 0x%x is not an ESP board?\n", esp_port);
1293 * We've got something that claims to be a Hayes ESP card.
1297 /* Get the dip-switch configuration */
1299 outb(esp_port + ESP98_CMD1, ESP_GETDIPS);
1300 dips = inb(esp_port + ESP98_STATUS1);
1302 outb(esp_port + ESP_CMD1, ESP_GETDIPS);
1303 dips = inb(esp_port + ESP_STATUS1);
1307 * Bits 0,1 of dips say which COM port we are.
1310 if ((rman_get_start(com->ioportres) & 0xff) ==
1311 likely_com_ports[dips & 0x03])
1313 if (rman_get_start(com->ioportres) == likely_com_ports[dips & 0x03])
1317 printf(" esp_port has com %d\n", dips & 0x03);
1322 * Check for ESP version 2.0 or later: bits 4,5,6 = 010.
1325 outb(esp_port + ESP98_CMD1, ESP_GETTEST);
1326 val = inb(esp_port + ESP98_STATUS1); /* clear reg 1 */
1327 val = inb(esp_port + ESP98_STATUS2);
1329 outb(esp_port + ESP_CMD1, ESP_GETTEST);
1330 val = inb(esp_port + ESP_STATUS1); /* clear reg 1 */
1331 val = inb(esp_port + ESP_STATUS2);
1333 if ((val & 0x70) < 0x20) {
1334 printf("-old (%o)", val & 0x70);
1339 * Check for ability to emulate 16550: bit 7 == 1
1341 if ((dips & 0x80) == 0) {
1347 * Okay, we seem to be a Hayes ESP card. Whee.
1350 com->esp_port = esp_port;
1353 #endif /* COM_ESP */
1356 sioattach(dev, xrid, rclk)
1369 struct resource *port;
1376 int if_type = GET_IFTYPE(device_get_flags(dev));
1381 if (IS_8251(if_type)) {
1382 port = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid,
1384 } else if (if_type == COM_IF_MODEM_CARD ||
1385 if_type == COM_IF_RSA98III ||
1386 isa_get_vendorid(dev)) {
1387 port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0,
1388 if_16550a_type[if_type & 0x0f].iatsz, RF_ACTIVE);
1390 port = isa_alloc_resourcev(dev, SYS_RES_IOPORT, &rid,
1391 if_16550a_type[if_type & 0x0f].iat,
1392 if_16550a_type[if_type & 0x0f].iatsz, RF_ACTIVE);
1395 port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
1396 0, ~0, IO_COMSIZE, RF_ACTIVE);
1401 if (!IS_8251(if_type)) {
1402 if (isa_load_resourcev(port,
1403 if_16550a_type[if_type & 0x0f].iat,
1404 if_16550a_type[if_type & 0x0f].iatsz) != 0) {
1405 bus_release_resource(dev, SYS_RES_IOPORT, rid, port);
1411 iobase = rman_get_start(port);
1412 unit = device_get_unit(dev);
1413 com = device_get_softc(dev);
1414 flags = device_get_flags(dev);
1416 if (unit >= sio_numunits)
1417 sio_numunits = unit + 1;
1421 if (if_type == COM_IF_RSA98III)
1423 if ((obuf = malloc(obufsize * 2, M_DEVBUF, M_NOWAIT)) == NULL) {
1424 bus_release_resource(dev, SYS_RES_IOPORT, rid, port);
1427 bzero(obuf, obufsize * 2);
1431 * sioprobe() has initialized the device registers as follows:
1432 * o cfcr = CFCR_8BITS.
1433 * It is most important that CFCR_DLAB is off, so that the
1434 * data port is not hidden when we enable interrupts.
1436 * Interrupts are only enabled when the line is open.
1437 * o mcr = MCR_IENABLE, or 0 if the port has AST/4 compatible
1438 * interrupt control register or the config specifies no irq.
1439 * Keeping MCR_DTR and MCR_RTS off might stop the external
1440 * device from sending before we are ready.
1442 bzero(com, sizeof *com);
1444 com->ioportres = port;
1445 com->ioportrid = rid;
1446 com->bst = rman_get_bustag(port);
1447 com->bsh = rman_get_bushandle(port);
1448 com->cfcr_image = CFCR_8BITS;
1449 com->loses_outints = COM_LOSESOUTINTS(flags) != 0;
1450 com->no_irq = bus_get_resource(dev, SYS_RES_IRQ, 0, NULL, NULL) != 0;
1451 com->tx_fifo_size = 1;
1453 com->obufsize = obufsize;
1455 com->obuf2 = obuf + obufsize;
1457 com->obufs[0].l_head = com->obuf1;
1458 com->obufs[1].l_head = com->obuf2;
1461 com->pc98_if_type = if_type;
1463 if (IS_8251(if_type)) {
1464 pc98_set_ioport(com);
1466 if (if_type == COM_IF_INTERNAL && pc98_check_8251fifo()) {
1467 com->pc98_8251fifo = 1;
1468 com->pc98_8251fifo_enable = 0;
1471 bus_addr_t *iat = if_16550a_type[if_type & 0x0f].iat;
1473 com->data_port = iobase + iat[com_data];
1474 com->int_ctl_port = iobase + iat[com_ier];
1475 com->int_id_port = iobase + iat[com_iir];
1476 com->modem_ctl_port = iobase + iat[com_mcr];
1477 com->mcr_image = inb(com->modem_ctl_port);
1478 com->line_status_port = iobase + iat[com_lsr];
1479 com->modem_status_port = iobase + iat[com_msr];
1481 #else /* not PC98 */
1482 com->data_port = iobase + com_data;
1483 com->int_ctl_port = iobase + com_ier;
1484 com->int_id_port = iobase + com_iir;
1485 com->modem_ctl_port = iobase + com_mcr;
1486 com->mcr_image = inb(com->modem_ctl_port);
1487 com->line_status_port = iobase + com_lsr;
1488 com->modem_status_port = iobase + com_msr;
1491 tp = com->tp = ttyalloc();
1492 tp->t_oproc = comstart;
1493 tp->t_param = comparam;
1494 tp->t_stop = comstop;
1495 tp->t_modem = commodem;
1496 tp->t_break = combreak;
1497 tp->t_close = comclose;
1498 tp->t_open = comopen;
1502 if (!IS_8251(if_type) && rclk == 0)
1503 rclk = if_16550a_type[if_type & 0x0f].rclk;
1506 rclk = DEFAULT_RCLK;
1510 if (unit == comconsole)
1511 ttyconsolemode(tp, comdefaultrate);
1512 error = siosetwater(com, tp->t_init_in.c_ispeed);
1513 mtx_unlock_spin(&sio_lock);
1516 * Leave i/o resources allocated if this is a `cn'-level
1517 * console, so that other devices can't snarf them.
1519 if (iobase != siocniobase)
1520 bus_release_resource(dev, SYS_RES_IOPORT, rid, port);
1524 /* attempt to determine UART type */
1525 printf("sio%d: type", unit);
1528 if (!COM_ISMULTIPORT(flags) &&
1529 !COM_IIR_TXRDYBUG(flags) && !COM_NOSCR(flags)) {
1534 scr = sio_getreg(com, com_scr);
1535 sio_setreg(com, com_scr, 0xa5);
1536 scr1 = sio_getreg(com, com_scr);
1537 sio_setreg(com, com_scr, 0x5a);
1538 scr2 = sio_getreg(com, com_scr);
1539 sio_setreg(com, com_scr, scr);
1540 if (scr1 != 0xa5 || scr2 != 0x5a) {
1541 printf(" 8250 or not responding");
1542 goto determined_type;
1547 if (IS_8251(com->pc98_if_type)) {
1548 if (com->pc98_8251fifo && !COM_NOFIFO(flags))
1549 com->tx_fifo_size = 16;
1550 com_int_TxRx_disable( com );
1551 com_cflag_and_speed_set( com, tp->t_init_in.c_cflag, comdefaultrate );
1552 com_tiocm_bic( com, TIOCM_DTR|TIOCM_RTS|TIOCM_LE );
1553 com_send_break_off( com );
1555 if (com->pc98_if_type == COM_IF_INTERNAL) {
1556 printf(" (internal%s%s)",
1557 com->pc98_8251fifo ? " fifo" : "",
1558 PC98SIO_baud_rate_port(com->pc98_if_type) != -1 ?
1561 printf(" 8251%s", if_8251_type[com->pc98_if_type & 0x0f].name);
1565 sio_setreg(com, com_fifo, FIFO_ENABLE | FIFO_RX_HIGH);
1567 switch (inb(com->int_id_port) & IIR_FIFO_MASK) {
1578 if (COM_NOFIFO(flags)) {
1579 printf(" 16550A fifo disabled");
1582 com->hasfifo = TRUE;
1584 if (com->pc98_if_type == COM_IF_RSA98III) {
1585 com->tx_fifo_size = 2048;
1586 com->rsabase = iobase;
1587 outb(com->rsabase + rsa_ier, 0x00);
1588 outb(com->rsabase + rsa_frr, 0x00);
1591 if (COM_ST16650A(flags)) {
1592 printf(" ST16650A");
1593 com->st16650a = TRUE;
1594 com->tx_fifo_size = 32;
1597 if (COM_TI16754(flags)) {
1599 com->tx_fifo_size = 64;
1606 if (com->pc98_if_type == COM_IF_ESP98)
1608 for (espp = likely_esp_ports; *espp != 0; espp++)
1609 if (espattach(com, *espp)) {
1610 com->tx_fifo_size = 1024;
1617 com->tx_fifo_size = 16;
1619 com->tx_fifo_size = COM_FIFOSIZE(flags);
1620 if (com->tx_fifo_size == 0)
1621 com->tx_fifo_size = 16;
1623 printf(" lookalike with %u bytes FIFO",
1630 if (com->pc98_if_type == COM_IF_RSB3000) {
1631 /* Set RSB-2000/3000 Extended Buffer mode. */
1633 lcr = sio_getreg(com, com_cfcr);
1634 sio_setreg(com, com_cfcr, lcr | CFCR_DLAB);
1635 sio_setreg(com, com_emr, EMR_EXBUFF | EMR_EFMODE);
1636 sio_setreg(com, com_cfcr, lcr);
1643 * Set 16550 compatibility mode.
1644 * We don't use the ESP_MODE_SCALE bit to increase the
1645 * fifo trigger levels because we can't handle large
1647 * XXX flow control should be set in comparam(), not here.
1650 outb(com->esp_port + ESP98_CMD1, ESP_SETMODE);
1651 outb(com->esp_port + ESP98_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO);
1653 outb(com->esp_port + ESP_CMD1, ESP_SETMODE);
1654 outb(com->esp_port + ESP_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO);
1657 /* Set RTS/CTS flow control. */
1659 outb(com->esp_port + ESP98_CMD1, ESP_SETFLOWTYPE);
1660 outb(com->esp_port + ESP98_CMD2, ESP_FLOW_RTS);
1661 outb(com->esp_port + ESP98_CMD2, ESP_FLOW_CTS);
1663 outb(com->esp_port + ESP_CMD1, ESP_SETFLOWTYPE);
1664 outb(com->esp_port + ESP_CMD2, ESP_FLOW_RTS);
1665 outb(com->esp_port + ESP_CMD2, ESP_FLOW_CTS);
1668 /* Set flow-control levels. */
1670 outb(com->esp_port + ESP98_CMD1, ESP_SETRXFLOW);
1671 outb(com->esp_port + ESP98_CMD2, HIBYTE(768));
1672 outb(com->esp_port + ESP98_CMD2, LOBYTE(768));
1673 outb(com->esp_port + ESP98_CMD2, HIBYTE(512));
1674 outb(com->esp_port + ESP98_CMD2, LOBYTE(512));
1676 outb(com->esp_port + ESP_CMD1, ESP_SETRXFLOW);
1677 outb(com->esp_port + ESP_CMD2, HIBYTE(768));
1678 outb(com->esp_port + ESP_CMD2, LOBYTE(768));
1679 outb(com->esp_port + ESP_CMD2, HIBYTE(512));
1680 outb(com->esp_port + ESP_CMD2, LOBYTE(512));
1684 /* Set UART clock prescaler. */
1685 outb(com->esp_port + ESP98_CMD1, ESP_SETCLOCK);
1686 outb(com->esp_port + ESP98_CMD2, 2); /* 4 times */
1689 #endif /* COM_ESP */
1690 sio_setreg(com, com_fifo, 0);
1692 printf("%s", if_16550a_type[com->pc98_if_type & 0x0f].name);
1697 #ifdef COM_MULTIPORT
1698 if (COM_ISMULTIPORT(flags)) {
1701 com->multiport = TRUE;
1702 printf(" (multiport");
1703 if (unit == COM_MPMASTER(flags))
1706 masterdev = devclass_get_device(sio_devclass,
1707 COM_MPMASTER(flags));
1708 com->no_irq = (masterdev == NULL || bus_get_resource(masterdev,
1709 SYS_RES_IRQ, 0, NULL, NULL) != 0);
1711 #endif /* COM_MULTIPORT */
1715 if (unit == comconsole)
1716 printf(", console");
1717 if (COM_IIR_TXRDYBUG(flags))
1718 printf(" with a buggy IIR_TXRDY implementation");
1721 if (sio_fast_ih == NULL) {
1722 swi_add(&tty_intr_event, "sio", siopoll, NULL, SWI_TTY, 0,
1724 swi_add(&clk_intr_event, "sio", siopoll, NULL, SWI_CLOCK, 0,
1729 com->pps.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR;
1730 tp->t_pps = &com->pps;
1732 if (COM_PPSCTS(flags))
1733 com->pps_bit = MSR_CTS;
1735 com->pps_bit = MSR_DCD;
1736 pps_init(&com->pps);
1739 com->irqres = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
1741 ret = bus_setup_intr(dev, com->irqres,
1742 INTR_TYPE_TTY | INTR_FAST,
1743 siointr, com, &com->cookie);
1745 ret = bus_setup_intr(dev,
1746 com->irqres, INTR_TYPE_TTY,
1747 siointr, com, &com->cookie);
1749 device_printf(dev, "unable to activate interrupt in fast mode - using normal mode\n");
1752 device_printf(dev, "could not activate interrupt\n");
1753 #if defined(KDB) && (defined(BREAK_TO_DEBUGGER) || \
1754 defined(ALT_BREAK_TO_DEBUGGER))
1756 * Enable interrupts for early break-to-debugger support
1759 if (ret == 0 && unit == comconsole)
1760 outb(siocniobase + com_ier, IER_ERXRDY | IER_ERLS |
1765 /* We're ready, open the doors... */
1766 ttycreate(tp, TS_CALLOUT, "d%r", unit);
1772 comopen(struct tty *tp, struct cdev *dev)
1778 com->poll = com->no_irq;
1779 com->poll_output = com->loses_outints;
1781 if (IS_8251(com->pc98_if_type)) {
1782 com_tiocm_bis(com, TIOCM_DTR|TIOCM_RTS);
1783 pc98_msrint_start(dev);
1784 if (com->pc98_8251fifo) {
1785 com->pc98_8251fifo_enable = 1;
1786 outb(I8251F_fcr, CTRL8251F_ENABLE |
1787 CTRL8251F_XMT_RST | CTRL8251F_RCV_RST);
1793 * (Re)enable and drain fifos.
1795 * Certain SMC chips cause problems if the fifos
1796 * are enabled while input is ready. Turn off the
1797 * fifo if necessary to clear the input. We test
1798 * the input ready bit after enabling the fifos
1799 * since we've already enabled them in comparam()
1800 * and to handle races between enabling and fresh
1803 for (i = 0; i < 500; i++) {
1804 sio_setreg(com, com_fifo,
1805 FIFO_RCV_RST | FIFO_XMT_RST
1808 if (com->pc98_if_type == COM_IF_RSA98III)
1809 outb(com->rsabase + rsa_frr , 0x00);
1812 * XXX the delays are for superstitious
1813 * historical reasons. It must be less than
1814 * the character time at the maximum
1815 * supported speed (87 usec at 115200 bps
1816 * 8N1). Otherwise we might loop endlessly
1817 * if data is streaming in. We used to use
1818 * delays of 100. That usually worked
1819 * because DELAY(100) used to usually delay
1820 * for about 85 usec instead of 100.
1824 if (com->pc98_if_type == COM_IF_RSA98III ?
1825 !(inb(com->rsabase + rsa_srr) & 0x08) :
1826 !(inb(com->line_status_port) & LSR_RXRDY))
1829 if (!(inb(com->line_status_port) & LSR_RXRDY))
1832 sio_setreg(com, com_fifo, 0);
1834 (void) inb(com->data_port);
1840 mtx_lock_spin(&sio_lock);
1842 if (IS_8251(com->pc98_if_type)) {
1843 com_tiocm_bis(com, TIOCM_LE);
1844 com->pc98_prev_modem_status = pc98_get_modem_status(com);
1845 com_int_Rx_enable(com);
1848 (void) inb(com->line_status_port);
1849 (void) inb(com->data_port);
1850 com->prev_modem_status = com->last_modem_status
1851 = inb(com->modem_status_port);
1852 outb(com->int_ctl_port,
1853 IER_ERXRDY | IER_ERLS | IER_EMSC
1854 | (COM_IIR_TXRDYBUG(com->flags) ? 0 : IER_ETXRDY));
1856 if (com->pc98_if_type == COM_IF_RSA98III) {
1857 outb(com->rsabase + rsa_ier, 0x1d);
1858 outb(com->int_ctl_port, IER_ERLS | IER_EMSC);
1864 mtx_unlock_spin(&sio_lock);
1866 /* XXX: should be generic ? */
1868 if ((IS_8251(com->pc98_if_type) &&
1869 (pc98_get_modem_status(com) & TIOCM_CAR)) ||
1870 (!IS_8251(com->pc98_if_type) &&
1871 (com->prev_modem_status & MSR_DCD)) ||
1875 if (com->prev_modem_status & MSR_DCD || ISCALLOUT(dev))
1891 com->poll_output = FALSE;
1893 com_send_break_off(com);
1895 sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK);
1898 #if defined(KDB) && (defined(BREAK_TO_DEBUGGER) || \
1899 defined(ALT_BREAK_TO_DEBUGGER))
1901 * Leave interrupts enabled and don't clear DTR if this is the
1902 * console. This allows us to detect break-to-debugger events
1903 * while the console device is closed.
1905 if (com->unit != comconsole)
1910 if (IS_8251(com->pc98_if_type))
1911 com_int_TxRx_disable(com);
1913 sio_setreg(com, com_ier, 0);
1914 if (com->pc98_if_type == COM_IF_RSA98III)
1915 outb(com->rsabase + rsa_ier, 0x00);
1916 if (IS_8251(com->pc98_if_type))
1917 tmp = pc98_get_modem_status(com) & TIOCM_CAR;
1919 tmp = com->prev_modem_status & MSR_DCD;
1921 sio_setreg(com, com_ier, 0);
1923 if (tp->t_cflag & HUPCL
1925 * XXX we will miss any carrier drop between here and the
1926 * next open. Perhaps we should watch DCD even when the
1927 * port is closed; it is not sufficient to check it at
1928 * the next open because it might go up and down while
1929 * we're not watching.
1935 && !(com->prev_modem_status & MSR_DCD)
1937 && !(tp->t_init_in.c_cflag & CLOCAL))
1938 || !(tp->t_state & TS_ISOPEN)) {
1940 if (IS_8251(com->pc98_if_type))
1941 com_tiocm_bic(com, TIOCM_DTR|TIOCM_RTS|TIOCM_LE);
1944 (void)commodem(tp, 0, SER_DTR);
1945 ttydtrwaitstart(tp);
1949 if (IS_8251(com->pc98_if_type))
1950 com_tiocm_bic(com, TIOCM_LE);
1955 if (com->pc98_8251fifo) {
1956 if (com->pc98_8251fifo_enable)
1957 outb(I8251F_fcr, CTRL8251F_XMT_RST | CTRL8251F_RCV_RST);
1958 com->pc98_8251fifo_enable = 0;
1963 * Disable fifos so that they are off after controlled
1964 * reboots. Some BIOSes fail to detect 16550s when the
1965 * fifos are enabled.
1967 sio_setreg(com, com_fifo, 0);
1969 tp->t_actout = FALSE;
1970 wakeup(&tp->t_actout);
1971 wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */
1983 com = (struct com_s *)chan;
1986 * Clear TS_BUSY if low-level output is complete.
1987 * spl locking is sufficient because siointr1() does not set CS_BUSY.
1988 * If siointr1() clears CS_BUSY after we look at it, then we'll get
1989 * called again. Reading the line status port outside of siointr1()
1990 * is safe because CS_BUSY is clear so there are no output interrupts
1994 if (com->state & CS_BUSY)
1995 com->extra_state &= ~CSE_BUSYCHECK; /* False alarm. */
1997 else if ((IS_8251(com->pc98_if_type) &&
1998 ((com->pc98_8251fifo_enable &&
1999 (inb(I8251F_lsr) & (STS8251F_TxRDY | STS8251F_TxEMP))
2000 == (STS8251F_TxRDY | STS8251F_TxEMP)) ||
2001 (!com->pc98_8251fifo_enable &&
2002 (inb(com->sts_port) & (STS8251_TxRDY | STS8251_TxEMP))
2003 == (STS8251_TxRDY | STS8251_TxEMP)))) ||
2004 ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY))
2005 == (LSR_TSRE | LSR_TXRDY))) {
2007 else if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY))
2008 == (LSR_TSRE | LSR_TXRDY)) {
2010 com->tp->t_state &= ~TS_BUSY;
2012 com->extra_state &= ~CSE_BUSYCHECK;
2014 timeout(siobusycheck, com, hz / 100);
2019 siodivisor(rclk, speed)
2029 #if UINT_MAX > (ULONG_MAX - 1) / 8
2030 if (speed > (ULONG_MAX - 1) / 8)
2033 divisor = (rclk / (8UL * speed) + 1) / 2;
2034 if (divisor == 0 || divisor >= 65536)
2036 actual_speed = rclk / (16UL * divisor);
2038 /* 10 times error in percent: */
2039 error = ((actual_speed - (long)speed) * 2000 / (long)speed + 1) / 2;
2041 /* 3.0% maximum error tolerance: */
2042 if (error < -30 || error > 30)
2049 * Call this function with the sio_lock mutex held. It will return with the
2064 if (!(tp->t_state & TS_ISOPEN) || !(tp->t_cflag & CREAD)) {
2065 com_events -= (com->iptr - com->ibuf);
2066 com->iptr = com->ibuf;
2069 if (tp->t_state & TS_CAN_BYPASS_L_RINT) {
2071 * Avoid the grotesquely inefficient lineswitch routine
2072 * (ttyinput) in "raw" mode. It usually takes about 450
2073 * instructions (that's without canonical processing or echo!).
2074 * slinput is reasonably fast (usually 40 instructions plus
2079 * This may look odd, but it is using save-and-enable
2080 * semantics instead of the save-and-disable semantics
2081 * that are used everywhere else.
2083 mtx_unlock_spin(&sio_lock);
2084 incc = com->iptr - buf;
2085 if (tp->t_rawq.c_cc + incc > tp->t_ihiwat
2086 && (com->state & CS_RTS_IFLOW
2087 || tp->t_iflag & IXOFF)
2088 && !(tp->t_state & TS_TBLOCK))
2090 com->delta_error_counts[CE_TTY_BUF_OVERFLOW]
2091 += b_to_q((char *)buf, incc, &tp->t_rawq);
2095 tp->t_rawcc += incc;
2097 if (tp->t_state & TS_TTSTOP
2098 && (tp->t_iflag & IXANY
2099 || tp->t_cc[VSTART] == tp->t_cc[VSTOP])) {
2100 tp->t_state &= ~TS_TTSTOP;
2101 tp->t_lflag &= ~FLUSHO;
2104 mtx_lock_spin(&sio_lock);
2105 } while (buf < com->iptr);
2109 * This may look odd, but it is using save-and-enable
2110 * semantics instead of the save-and-disable semantics
2111 * that are used everywhere else.
2113 mtx_unlock_spin(&sio_lock);
2114 line_status = buf[com->ierroff];
2117 & (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) {
2118 if (line_status & LSR_BI)
2119 recv_data |= TTY_BI;
2120 if (line_status & LSR_FE)
2121 recv_data |= TTY_FE;
2122 if (line_status & LSR_OE)
2123 recv_data |= TTY_OE;
2124 if (line_status & LSR_PE)
2125 recv_data |= TTY_PE;
2127 ttyld_rint(tp, recv_data);
2128 mtx_lock_spin(&sio_lock);
2129 } while (buf < com->iptr);
2131 com_events -= (com->iptr - com->ibuf);
2132 com->iptr = com->ibuf;
2135 * There is now room for another low-level buffer full of input,
2136 * so enable RTS if it is now disabled and there is room in the
2137 * high-level buffer.
2140 if (IS_8251(com->pc98_if_type)) {
2141 if ((com->state & CS_RTS_IFLOW) &&
2142 !(com_tiocm_get(com) & TIOCM_RTS) &&
2143 !(tp->t_state & TS_TBLOCK))
2144 com_tiocm_bis(com, TIOCM_RTS);
2146 if ((com->state & CS_RTS_IFLOW) &&
2147 !(com->mcr_image & MCR_RTS) &&
2148 !(tp->t_state & TS_TBLOCK))
2149 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS);
2152 if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & MCR_RTS) &&
2153 !(tp->t_state & TS_TBLOCK))
2154 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS);
2163 #if defined(PC98) && defined(COM_MULTIPORT)
2164 u_char rsa_buf_status;
2167 #ifndef COM_MULTIPORT
2168 com = (struct com_s *)arg;
2170 mtx_lock_spin(&sio_lock);
2172 mtx_unlock_spin(&sio_lock);
2173 #else /* COM_MULTIPORT */
2174 bool_t possibly_more_intrs;
2178 * Loop until there is no activity on any port. This is necessary
2179 * to get an interrupt edge more than to avoid another interrupt.
2180 * If the IRQ signal is just an OR of the IRQ signals from several
2181 * devices, then the edge from one may be lost because another is
2184 mtx_lock_spin(&sio_lock);
2186 possibly_more_intrs = FALSE;
2187 for (unit = 0; unit < sio_numunits; ++unit) {
2188 com = com_addr(unit);
2191 * would it work here, or be counter-productive?
2196 && IS_8251(com->pc98_if_type)) {
2198 } else if (com != NULL
2200 && com->pc98_if_type == COM_IF_RSA98III) {
2202 inb(com->rsabase + rsa_srr) & 0xc9;
2203 if ((rsa_buf_status & 0xc8)
2204 || !(rsa_buf_status & 0x01)) {
2206 if (rsa_buf_status !=
2207 (inb(com->rsabase + rsa_srr) & 0xc9))
2208 possibly_more_intrs = TRUE;
2214 && (inb(com->int_id_port) & IIR_IMASK)
2217 possibly_more_intrs = TRUE;
2219 /* XXX COM_UNLOCK(); */
2221 } while (possibly_more_intrs);
2222 mtx_unlock_spin(&sio_lock);
2223 #endif /* COM_MULTIPORT */
2226 static struct timespec siots[8];
2228 static int volatile siotsunit = -1;
2231 sysctl_siots(SYSCTL_HANDLER_ARGS)
2238 for (i = 1, tso = siotso; i < tso; i++) {
2239 delta = (long long)(siots[i].tv_sec - siots[i - 1].tv_sec) *
2241 (siots[i].tv_nsec - siots[i - 1].tv_nsec);
2242 len = sprintf(buf, "%lld\n", delta);
2243 if (delta >= 110000)
2244 len += sprintf(buf + len - 1, ": *** %ld.%09ld\n",
2245 (long)siots[i].tv_sec, siots[i].tv_nsec) - 1;
2247 buf[len - 1] = '\0';
2248 error = SYSCTL_OUT(req, buf, len);
2256 SYSCTL_PROC(_machdep, OID_AUTO, siots, CTLTYPE_STRING | CTLFLAG_RD,
2257 0, 0, sysctl_siots, "A", "sio timestamps");
2266 u_char modem_status;
2272 u_char rsa_buf_status = 0;
2273 int rsa_tx_fifo_size = 0;
2276 if (COM_IIR_TXRDYBUG(com->flags)) {
2277 int_ctl = inb(com->int_ctl_port);
2278 int_ctl_new = int_ctl;
2284 while (!com->gone) {
2287 if (IS_8251(com->pc98_if_type)) {
2288 if (com->pc98_8251fifo_enable)
2289 tmp = inb(I8251F_lsr);
2291 tmp = inb(com->sts_port);
2294 if (com->pc98_8251fifo_enable) {
2295 if (tmp & STS8251F_TxRDY) line_status |= LSR_TXRDY;
2296 if (tmp & STS8251F_RxRDY) line_status |= LSR_RXRDY;
2297 if (tmp & STS8251F_TxEMP) line_status |= LSR_TSRE;
2298 if (tmp & STS8251F_PE) line_status |= LSR_PE;
2299 if (tmp & STS8251F_OE) line_status |= LSR_OE;
2300 if (tmp & STS8251F_BD_SD) line_status |= LSR_BI;
2302 if (tmp & STS8251_TxRDY) line_status |= LSR_TXRDY;
2303 if (tmp & STS8251_RxRDY) line_status |= LSR_RXRDY;
2304 if (tmp & STS8251_TxEMP) line_status |= LSR_TSRE;
2305 if (tmp & STS8251_PE) line_status |= LSR_PE;
2306 if (tmp & STS8251_OE) line_status |= LSR_OE;
2307 if (tmp & STS8251_FE) line_status |= LSR_FE;
2308 if (tmp & STS8251_BD_SD) line_status |= LSR_BI;
2312 if (com->pps.ppsparam.mode & PPS_CAPTUREBOTH) {
2313 modem_status = inb(com->modem_status_port);
2314 if ((modem_status ^ com->last_modem_status) &
2316 pps_capture(&com->pps);
2317 pps_event(&com->pps,
2318 (modem_status & com->pps_bit) ?
2319 PPS_CAPTUREASSERT : PPS_CAPTURECLEAR);
2322 line_status = inb(com->line_status_port);
2325 if (com->pc98_if_type == COM_IF_RSA98III)
2326 rsa_buf_status = inb(com->rsabase + rsa_srr);
2329 /* input event? (check first to help avoid overruns) */
2331 while (line_status & LSR_RCV_MASK) {
2333 while ((line_status & LSR_RCV_MASK)
2334 || (com->pc98_if_type == COM_IF_RSA98III
2335 && (rsa_buf_status & 0x08))) {
2337 /* break/unnattached error bits or real input? */
2339 if (IS_8251(com->pc98_if_type)) {
2340 if (com->pc98_8251fifo_enable) {
2341 recv_data = inb(I8251F_data);
2342 if (tmp & (STS8251F_PE | STS8251F_OE |
2344 pc98_i8251_or_cmd(com, CMD8251_ER);
2348 recv_data = inb(com->data_port);
2349 if (tmp & (STS8251_PE | STS8251_OE |
2350 STS8251_FE | STS8251_BD_SD)) {
2351 pc98_i8251_or_cmd(com, CMD8251_ER);
2355 } else if (com->pc98_if_type == COM_IF_RSA98III) {
2356 if (!(rsa_buf_status & 0x08))
2359 recv_data = inb(com->data_port);
2362 if (!(line_status & LSR_RXRDY))
2365 recv_data = inb(com->data_port);
2367 #ifdef ALT_BREAK_TO_DEBUGGER
2368 if (com->unit == comconsole &&
2369 kdb_alt_break(recv_data, &com->alt_brk_state) != 0)
2370 kdb_enter("Break sequence on console");
2371 #endif /* ALT_BREAK_TO_DEBUGGER */
2373 if (line_status & (LSR_BI | LSR_FE | LSR_PE)) {
2375 * Don't store BI if IGNBRK or FE/PE if IGNPAR.
2376 * Otherwise, push the work to a higher level
2377 * (to handle PARMRK) if we're bypassing.
2378 * Otherwise, convert BI/FE and PE+INPCK to 0.
2380 * This makes bypassing work right in the
2381 * usual "raw" case (IGNBRK set, and IGNPAR
2384 * Note: BI together with FE/PE means just BI.
2386 if (line_status & LSR_BI) {
2387 #if defined(KDB) && defined(BREAK_TO_DEBUGGER)
2388 if (com->unit == comconsole) {
2389 kdb_enter("Line break on console");
2394 || com->tp->t_iflag & IGNBRK)
2398 || com->tp->t_iflag & IGNPAR)
2401 if (com->tp->t_state & TS_CAN_BYPASS_L_RINT
2402 && (line_status & (LSR_BI | LSR_FE)
2403 || com->tp->t_iflag & INPCK))
2407 if (com->tp != NULL &&
2408 com->tp->t_hotchar != 0 && recv_data == com->tp->t_hotchar)
2409 swi_sched(sio_fast_ih, 0);
2411 if (ioptr >= com->ibufend)
2412 CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW);
2414 if (com->tp != NULL && com->tp->t_do_timestamp)
2415 microtime(&com->tp->t_timestamp);
2417 swi_sched(sio_slow_ih, SWI_DELAY);
2418 #if 0 /* for testing input latency vs efficiency */
2419 if (com->iptr - com->ibuf == 8)
2420 swi_sched(sio_fast_ih, 0);
2422 ioptr[0] = recv_data;
2423 ioptr[com->ierroff] = line_status;
2424 com->iptr = ++ioptr;
2425 if (ioptr == com->ihighwater
2426 && com->state & CS_RTS_IFLOW)
2428 IS_8251(com->pc98_if_type) ?
2429 com_tiocm_bic(com, TIOCM_RTS) :
2431 outb(com->modem_ctl_port,
2432 com->mcr_image &= ~MCR_RTS);
2433 if (line_status & LSR_OE)
2434 CE_RECORD(com, CE_OVERRUN);
2437 if (line_status & LSR_TXRDY
2438 && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY))
2442 * "& 0x7F" is to avoid the gcc-1.40 generating a slow
2443 * jump from the top of the loop to here
2446 if (IS_8251(com->pc98_if_type))
2450 line_status = inb(com->line_status_port) & 0x7F;
2452 if (com->pc98_if_type == COM_IF_RSA98III)
2453 rsa_buf_status = inb(com->rsabase + rsa_srr);
2457 /* modem status change? (always check before doing output) */
2459 if (!IS_8251(com->pc98_if_type)) {
2461 modem_status = inb(com->modem_status_port);
2462 if (modem_status != com->last_modem_status) {
2464 * Schedule high level to handle DCD changes. Note
2465 * that we don't use the delta bits anywhere. Some
2466 * UARTs mess them up, and it's easy to remember the
2467 * previous bits and calculate the delta.
2469 com->last_modem_status = modem_status;
2470 if (!(com->state & CS_CHECKMSR)) {
2471 com_events += LOTS_OF_EVENTS;
2472 com->state |= CS_CHECKMSR;
2473 swi_sched(sio_fast_ih, 0);
2476 /* handle CTS change immediately for crisp flow ctl */
2477 if (com->state & CS_CTS_OFLOW) {
2478 if (modem_status & MSR_CTS)
2479 com->state |= CS_ODEVREADY;
2481 com->state &= ~CS_ODEVREADY;
2489 /* output queued and everything ready? */
2491 if (line_status & LSR_TXRDY
2492 && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) {
2494 if (((com->pc98_if_type == COM_IF_RSA98III)
2495 ? (rsa_buf_status & 0x02)
2496 : (line_status & LSR_TXRDY))
2497 && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) {
2500 Port_t tmp_data_port;
2502 if (IS_8251(com->pc98_if_type) &&
2503 com->pc98_8251fifo_enable)
2504 tmp_data_port = I8251F_data;
2506 tmp_data_port = com->data_port;
2509 ioptr = com->obufq.l_head;
2510 if (com->tx_fifo_size > 1 && com->unit != siotsunit) {
2513 ocount = com->obufq.l_tail - ioptr;
2515 if (com->pc98_if_type == COM_IF_RSA98III) {
2516 rsa_buf_status = inb(com->rsabase + rsa_srr);
2517 rsa_tx_fifo_size = 1024;
2518 if (!(rsa_buf_status & 0x01))
2519 rsa_tx_fifo_size = 2048;
2520 if (ocount > rsa_tx_fifo_size)
2521 ocount = rsa_tx_fifo_size;
2524 if (ocount > com->tx_fifo_size)
2525 ocount = com->tx_fifo_size;
2526 com->bytes_out += ocount;
2529 outb(tmp_data_port, *ioptr++);
2531 outb(com->data_port, *ioptr++);
2533 while (--ocount != 0);
2536 outb(tmp_data_port, *ioptr++);
2538 outb(com->data_port, *ioptr++);
2541 if (com->unit == siotsunit
2542 && siotso < sizeof siots / sizeof siots[0])
2543 nanouptime(&siots[siotso++]);
2546 if (IS_8251(com->pc98_if_type))
2547 if (!(pc98_check_i8251_interrupt(com) & IEN_TxFLAG))
2548 com_int_Tx_enable(com);
2550 com->obufq.l_head = ioptr;
2551 if (COM_IIR_TXRDYBUG(com->flags))
2552 int_ctl_new = int_ctl | IER_ETXRDY;
2553 if (ioptr >= com->obufq.l_tail) {
2556 qp = com->obufq.l_next;
2557 qp->l_queued = FALSE;
2560 com->obufq.l_head = qp->l_head;
2561 com->obufq.l_tail = qp->l_tail;
2562 com->obufq.l_next = qp;
2564 /* output just completed */
2565 if (COM_IIR_TXRDYBUG(com->flags))
2566 int_ctl_new = int_ctl
2568 com->state &= ~CS_BUSY;
2570 if (IS_8251(com->pc98_if_type) &&
2571 pc98_check_i8251_interrupt(com) & IEN_TxFLAG)
2572 com_int_Tx_disable(com);
2575 if (!(com->state & CS_ODONE)) {
2576 com_events += LOTS_OF_EVENTS;
2577 com->state |= CS_ODONE;
2578 /* handle at high level ASAP */
2579 swi_sched(sio_fast_ih, 0);
2583 if (COM_IIR_TXRDYBUG(com->flags)
2584 && int_ctl != int_ctl_new) {
2585 if (com->pc98_if_type == COM_IF_RSA98III) {
2586 int_ctl_new &= ~(IER_ETXRDY | IER_ERXRDY);
2587 outb(com->int_ctl_port, int_ctl_new);
2588 outb(com->rsabase + rsa_ier, 0x1d);
2590 outb(com->int_ctl_port, int_ctl_new);
2593 if (COM_IIR_TXRDYBUG(com->flags)
2594 && int_ctl != int_ctl_new)
2595 outb(com->int_ctl_port, int_ctl_new);
2599 else if (line_status & LSR_TXRDY) {
2600 if (IS_8251(com->pc98_if_type))
2601 if (pc98_check_i8251_interrupt(com) & IEN_TxFLAG)
2602 com_int_Tx_disable(com);
2604 if (IS_8251(com->pc98_if_type)) {
2605 if (com->pc98_8251fifo_enable) {
2606 if ((tmp = inb(I8251F_lsr)) & STS8251F_RxRDY)
2609 if ((tmp = inb(com->sts_port)) & STS8251_RxRDY)
2616 #ifndef COM_MULTIPORT
2618 if (IS_8251(com->pc98_if_type))
2621 if ((inb(com->int_id_port) & IIR_IMASK) == IIR_NOPEND)
2622 #endif /* COM_MULTIPORT */
2627 /* software interrupt handler for SWI_TTY */
2629 siopoll(void *dummy)
2633 if (com_events == 0)
2636 for (unit = 0; unit < sio_numunits; ++unit) {
2641 com = com_addr(unit);
2645 if (tp == NULL || com->gone) {
2647 * Discard any events related to never-opened or
2648 * going-away devices.
2650 mtx_lock_spin(&sio_lock);
2651 incc = com->iptr - com->ibuf;
2652 com->iptr = com->ibuf;
2653 if (com->state & CS_CHECKMSR) {
2654 incc += LOTS_OF_EVENTS;
2655 com->state &= ~CS_CHECKMSR;
2658 mtx_unlock_spin(&sio_lock);
2661 if (com->iptr != com->ibuf) {
2662 mtx_lock_spin(&sio_lock);
2664 mtx_unlock_spin(&sio_lock);
2666 if (com->state & CS_CHECKMSR) {
2667 u_char delta_modem_status;
2670 if (!IS_8251(com->pc98_if_type)) {
2672 mtx_lock_spin(&sio_lock);
2673 delta_modem_status = com->last_modem_status
2674 ^ com->prev_modem_status;
2675 com->prev_modem_status = com->last_modem_status;
2676 com_events -= LOTS_OF_EVENTS;
2677 com->state &= ~CS_CHECKMSR;
2678 mtx_unlock_spin(&sio_lock);
2679 if (delta_modem_status & MSR_DCD)
2681 com->prev_modem_status & MSR_DCD);
2686 if (com->state & CS_ODONE) {
2687 mtx_lock_spin(&sio_lock);
2688 com_events -= LOTS_OF_EVENTS;
2689 com->state &= ~CS_ODONE;
2690 mtx_unlock_spin(&sio_lock);
2691 if (!(com->state & CS_BUSY)
2692 && !(com->extra_state & CSE_BUSYCHECK)) {
2693 timeout(siobusycheck, com, hz / 100);
2694 com->extra_state |= CSE_BUSYCHECK;
2698 if (com_events == 0)
2701 if (com_events >= LOTS_OF_EVENTS)
2716 com_send_break_on(com);
2718 com_send_break_off(com);
2721 sio_setreg(com, com_cfcr, com->cfcr_image |= CFCR_SBREAK);
2723 sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK);
2738 u_char efr_flowbits;
2751 if (IS_8251(com->pc98_if_type)) {
2752 if (pc98_ttspeedtab(com, t->c_ospeed, &divisor) != 0)
2756 /* check requested parameters */
2757 if (t->c_ispeed != (t->c_ospeed != 0 ? t->c_ospeed : tp->t_ospeed))
2759 divisor = siodivisor(com->rclk, t->c_ispeed);
2766 /* parameters are OK, convert them to the com struct and the device */
2769 if (IS_8251(com->pc98_if_type)) {
2770 if (t->c_ospeed == 0)
2771 com_tiocm_bic(com, TIOCM_DTR|TIOCM_RTS|TIOCM_LE);
2773 com_tiocm_bis(com, TIOCM_DTR|TIOCM_RTS|TIOCM_LE);
2776 if (t->c_ospeed == 0)
2777 (void)commodem(tp, 0, SER_DTR); /* hang up line */
2779 (void)commodem(tp, SER_DTR, 0);
2782 if (!IS_8251(com->pc98_if_type)) {
2784 switch (cflag & CSIZE) {
2798 if (cflag & PARENB) {
2800 if (!(cflag & PARODD))
2808 * Use a fifo trigger level low enough so that the input
2809 * latency from the fifo is less than about 16 msec and
2810 * the total latency is less than about 30 msec. These
2811 * latencies are reasonable for humans. Serial comms
2812 * protocols shouldn't expect anything better since modem
2813 * latencies are larger.
2815 * The fifo trigger level cannot be set at RX_HIGH for high
2816 * speed connections without further work on reducing
2817 * interrupt disablement times in other parts of the system,
2818 * without producing silo overflow errors.
2820 com->fifo_image = com->unit == siotsunit ? 0
2821 : t->c_ispeed <= 4800
2822 ? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_MEDH;
2825 * The Hayes ESP card needs the fifo DMA mode bit set
2826 * in compatibility mode. If not, it will interrupt
2827 * for each character received.
2830 com->fifo_image |= FIFO_DMA_MODE;
2832 sio_setreg(com, com_fifo, com->fifo_image);
2839 * This returns with interrupts disabled so that we can complete
2840 * the speed change atomically. Keeping interrupts disabled is
2841 * especially important while com_data is hidden.
2843 (void) siosetwater(com, t->c_ispeed);
2846 if (IS_8251(com->pc98_if_type))
2847 com_cflag_and_speed_set(com, cflag, t->c_ospeed);
2850 sio_setreg(com, com_cfcr, cfcr | CFCR_DLAB);
2852 * Only set the divisor registers if they would change, since on
2853 * some 16550 incompatibles (UMC8669F), setting them while input
2854 * is arriving loses sync until data stops arriving.
2856 dlbl = divisor & 0xFF;
2857 if (sio_getreg(com, com_dlbl) != dlbl)
2858 sio_setreg(com, com_dlbl, dlbl);
2859 dlbh = divisor >> 8;
2860 if (sio_getreg(com, com_dlbh) != dlbh)
2861 sio_setreg(com, com_dlbh, dlbh);
2868 if (cflag & CRTS_IFLOW) {
2869 com->state |= CS_RTS_IFLOW;
2870 efr_flowbits |= EFR_AUTORTS;
2872 * If CS_RTS_IFLOW just changed from off to on, the change
2873 * needs to be propagated to MCR_RTS. This isn't urgent,
2874 * so do it later by calling comstart() instead of repeating
2875 * a lot of code from comstart() here.
2877 } else if (com->state & CS_RTS_IFLOW) {
2878 com->state &= ~CS_RTS_IFLOW;
2880 * CS_RTS_IFLOW just changed from on to off. Force MCR_RTS
2881 * on here, since comstart() won't do it later.
2884 if (IS_8251(com->pc98_if_type))
2885 com_tiocm_bis(com, TIOCM_RTS);
2887 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS);
2889 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS);
2894 * Set up state to handle output flow control.
2895 * XXX - worth handling MDMBUF (DCD) flow control at the lowest level?
2896 * Now has 10+ msec latency, while CTS flow has 50- usec latency.
2898 com->state |= CS_ODEVREADY;
2899 com->state &= ~CS_CTS_OFLOW;
2901 if (com->pc98_if_type == COM_IF_RSA98III) {
2902 param = inb(com->rsabase + rsa_msr);
2903 outb(com->rsabase + rsa_msr, param & 0x14);
2906 if (cflag & CCTS_OFLOW) {
2907 com->state |= CS_CTS_OFLOW;
2908 efr_flowbits |= EFR_AUTOCTS;
2910 if (IS_8251(com->pc98_if_type)) {
2911 if (!(pc98_get_modem_status(com) & TIOCM_CTS))
2912 com->state &= ~CS_ODEVREADY;
2913 } else if (com->pc98_if_type == COM_IF_RSA98III) {
2914 /* Set automatic flow control mode */
2915 outb(com->rsabase + rsa_msr, param | 0x08);
2918 if (!(com->last_modem_status & MSR_CTS))
2919 com->state &= ~CS_ODEVREADY;
2923 if (!IS_8251(com->pc98_if_type))
2924 sio_setreg(com, com_cfcr, com->cfcr_image = cfcr);
2926 if (com->st16650a) {
2927 sio_setreg(com, com_lcr, LCR_EFR_ENABLE);
2928 sio_setreg(com, com_efr,
2929 (sio_getreg(com, com_efr)
2930 & ~(EFR_AUTOCTS | EFR_AUTORTS)) | efr_flowbits);
2932 sio_setreg(com, com_cfcr, com->cfcr_image = cfcr);
2935 /* XXX shouldn't call functions while intrs are disabled. */
2938 mtx_unlock_spin(&sio_lock);
2941 if (com->ibufold != NULL) {
2942 free(com->ibufold, M_DEVBUF);
2943 com->ibufold = NULL;
2949 * This function must be called with the sio_lock mutex released and will
2950 * return with it obtained.
2953 siosetwater(com, speed)
2963 * Make the buffer size large enough to handle a softtty interrupt
2964 * latency of about 2 ticks without loss of throughput or data
2965 * (about 3 ticks if input flow control is not used or not honoured,
2966 * but a bit less for CS5-CS7 modes).
2968 cp4ticks = speed / 10 / hz * 4;
2969 for (ibufsize = 128; ibufsize < cp4ticks;)
2972 if (com->pc98_if_type == COM_IF_RSA98III)
2975 if (ibufsize == com->ibufsize) {
2976 mtx_lock_spin(&sio_lock);
2981 * Allocate input buffer. The extra factor of 2 in the size is
2982 * to allow for an error byte for each input byte.
2984 ibuf = malloc(2 * ibufsize, M_DEVBUF, M_NOWAIT);
2986 mtx_lock_spin(&sio_lock);
2990 /* Initialize non-critical variables. */
2991 com->ibufold = com->ibuf;
2992 com->ibufsize = ibufsize;
2995 tp->t_ififosize = 2 * ibufsize;
2996 tp->t_ispeedwat = (speed_t)-1;
2997 tp->t_ospeedwat = (speed_t)-1;
3001 * Read current input buffer, if any. Continue with interrupts
3004 mtx_lock_spin(&sio_lock);
3005 if (com->iptr != com->ibuf)
3009 * Initialize critical variables, including input buffer watermarks.
3010 * The external device is asked to stop sending when the buffer
3011 * exactly reaches high water, or when the high level requests it.
3012 * The high level is notified immediately (rather than at a later
3013 * clock tick) when this watermark is reached.
3014 * The buffer size is chosen so the watermark should almost never
3016 * The low watermark is invisibly 0 since the buffer is always
3017 * emptied all at once.
3019 com->iptr = com->ibuf = ibuf;
3020 com->ibufend = ibuf + ibufsize;
3021 com->ierroff = ibufsize;
3022 com->ihighwater = ibuf + 3 * ibufsize / 4;
3037 mtx_lock_spin(&sio_lock);
3038 if (tp->t_state & TS_TTSTOP)
3039 com->state &= ~CS_TTGO;
3041 com->state |= CS_TTGO;
3042 if (tp->t_state & TS_TBLOCK) {
3044 if (IS_8251(com->pc98_if_type)) {
3045 if ((com_tiocm_get(com) & TIOCM_RTS) &&
3046 (com->state & CS_RTS_IFLOW))
3047 com_tiocm_bic(com, TIOCM_RTS);
3049 if ((com->mcr_image & MCR_RTS) &&
3050 (com->state & CS_RTS_IFLOW))
3051 outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS);
3054 if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW)
3055 outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS);
3059 if (IS_8251(com->pc98_if_type)) {
3060 if (!(com_tiocm_get(com) & TIOCM_RTS) &&
3061 com->iptr < com->ihighwater &&
3062 com->state & CS_RTS_IFLOW)
3063 com_tiocm_bis(com, TIOCM_RTS);
3065 if (!(com->mcr_image & MCR_RTS) &&
3066 com->iptr < com->ihighwater &&
3067 com->state & CS_RTS_IFLOW)
3068 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS);
3071 if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater
3072 && com->state & CS_RTS_IFLOW)
3073 outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS);
3076 mtx_unlock_spin(&sio_lock);
3077 if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) {
3082 if (tp->t_outq.c_cc != 0) {
3086 if (!com->obufs[0].l_queued) {
3087 com->obufs[0].l_tail
3088 = com->obuf1 + q_to_b(&tp->t_outq, com->obuf1,
3094 com->obufs[0].l_next = NULL;
3095 com->obufs[0].l_queued = TRUE;
3096 mtx_lock_spin(&sio_lock);
3097 if (com->state & CS_BUSY) {
3098 qp = com->obufq.l_next;
3099 while ((next = qp->l_next) != NULL)
3101 qp->l_next = &com->obufs[0];
3103 com->obufq.l_head = com->obufs[0].l_head;
3104 com->obufq.l_tail = com->obufs[0].l_tail;
3105 com->obufq.l_next = &com->obufs[0];
3106 com->state |= CS_BUSY;
3108 mtx_unlock_spin(&sio_lock);
3110 if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) {
3111 com->obufs[1].l_tail
3112 = com->obuf2 + q_to_b(&tp->t_outq, com->obuf2,
3118 com->obufs[1].l_next = NULL;
3119 com->obufs[1].l_queued = TRUE;
3120 mtx_lock_spin(&sio_lock);
3121 if (com->state & CS_BUSY) {
3122 qp = com->obufq.l_next;
3123 while ((next = qp->l_next) != NULL)
3125 qp->l_next = &com->obufs[1];
3127 com->obufq.l_head = com->obufs[1].l_head;
3128 com->obufq.l_tail = com->obufs[1].l_tail;
3129 com->obufq.l_next = &com->obufs[1];
3130 com->state |= CS_BUSY;
3132 mtx_unlock_spin(&sio_lock);
3134 tp->t_state |= TS_BUSY;
3136 mtx_lock_spin(&sio_lock);
3137 if (com->state >= (CS_BUSY | CS_TTGO))
3138 siointr1(com); /* fake interrupt to start output */
3139 mtx_unlock_spin(&sio_lock);
3155 if (com == NULL || com->gone)
3157 mtx_lock_spin(&sio_lock);
3160 if (!IS_8251(com->pc98_if_type)) {
3164 /* XXX avoid h/w bug. */
3167 sio_setreg(com, com_fifo,
3168 FIFO_XMT_RST | com->fifo_image);
3170 if (com->pc98_if_type == COM_IF_RSA98III)
3171 for (rsa98_tmp = 0; rsa98_tmp < 2048; rsa98_tmp++)
3172 sio_setreg(com, com_fifo,
3173 FIFO_XMT_RST | com->fifo_image);
3176 com->obufs[0].l_queued = FALSE;
3177 com->obufs[1].l_queued = FALSE;
3178 if (com->state & CS_ODONE)
3179 com_events -= LOTS_OF_EVENTS;
3180 com->state &= ~(CS_ODONE | CS_BUSY);
3181 com->tp->t_state &= ~TS_BUSY;
3185 if (!IS_8251(com->pc98_if_type)) {
3186 if (com->pc98_if_type == COM_IF_RSA98III)
3187 for (rsa98_tmp = 0; rsa98_tmp < 2048; rsa98_tmp++)
3188 sio_getreg(com, com_data);
3192 /* XXX avoid h/w bug. */
3195 sio_setreg(com, com_fifo,
3196 FIFO_RCV_RST | com->fifo_image);
3200 com_events -= (com->iptr - com->ibuf);
3201 com->iptr = com->ibuf;
3203 mtx_unlock_spin(&sio_lock);
3208 commodem(struct tty *tp, int sigon, int sigoff)
3211 int bitand, bitor, msr;
3219 if (sigon != 0 || sigoff != 0) {
3221 if (IS_8251(com->pc98_if_type)) {
3224 if (sigoff & SER_DTR) {
3225 bitand |= TIOCM_DTR;
3228 if (sigoff & SER_RTS) {
3229 bitand |= TIOCM_RTS;
3230 clr |= CMD8251_RxEN | CMD8251_RTS;
3232 if (sigon & SER_DTR) {
3234 set |= CMD8251_TxEN | CMD8251_RxEN |
3237 if (sigon & SER_RTS) {
3239 set |= CMD8251_TxEN | CMD8251_RxEN |
3243 mtx_lock_spin(&sio_lock);
3244 com->pc98_prev_modem_status &= bitand;
3245 com->pc98_prev_modem_status |= bitor;
3246 pc98_i8251_clear_or_cmd(com, clr, set);
3247 mtx_unlock_spin(&sio_lock);
3252 if (sigoff & SER_DTR)
3254 if (sigoff & SER_RTS)
3256 if (sigon & SER_DTR)
3258 if (sigon & SER_RTS)
3261 mtx_lock_spin(&sio_lock);
3262 com->mcr_image &= bitand;
3263 com->mcr_image |= bitor;
3264 outb(com->modem_ctl_port, com->mcr_image);
3265 mtx_unlock_spin(&sio_lock);
3272 if (IS_8251(com->pc98_if_type))
3273 return (com_tiocm_get(com));
3277 if (com->mcr_image & MCR_DTR)
3279 if (com->mcr_image & MCR_RTS)
3281 msr = com->prev_modem_status;
3290 if (msr & (MSR_RI | MSR_TERI))
3307 * Set our timeout period to 1 second if no polled devices are open.
3308 * Otherwise set it to max(1/200, 1/hz).
3309 * Enable timeouts iff some device is open.
3311 untimeout(comwakeup, (void *)NULL, sio_timeout_handle);
3314 for (unit = 0; unit < sio_numunits; ++unit) {
3315 com = com_addr(unit);
3316 if (com != NULL && com->tp != NULL
3317 && com->tp->t_state & TS_ISOPEN && !com->gone) {
3319 if (com->poll || com->poll_output) {
3320 sio_timeout = hz > 200 ? hz / 200 : 1;
3326 sio_timeouts_until_log = hz / sio_timeout;
3327 sio_timeout_handle = timeout(comwakeup, (void *)NULL,
3330 /* Flush error messages, if any. */
3331 sio_timeouts_until_log = 1;
3332 comwakeup((void *)NULL);
3333 untimeout(comwakeup, (void *)NULL, sio_timeout_handle);
3344 sio_timeout_handle = timeout(comwakeup, (void *)NULL, sio_timeout);
3347 * Recover from lost output interrupts.
3348 * Poll any lines that don't use interrupts.
3350 for (unit = 0; unit < sio_numunits; ++unit) {
3351 com = com_addr(unit);
3352 if (com != NULL && !com->gone
3353 && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) {
3354 mtx_lock_spin(&sio_lock);
3356 mtx_unlock_spin(&sio_lock);
3361 * Check for and log errors, but not too often.
3363 if (--sio_timeouts_until_log > 0)
3365 sio_timeouts_until_log = hz / sio_timeout;
3366 for (unit = 0; unit < sio_numunits; ++unit) {
3369 com = com_addr(unit);
3374 for (errnum = 0; errnum < CE_NTYPES; ++errnum) {
3378 mtx_lock_spin(&sio_lock);
3379 delta = com->delta_error_counts[errnum];
3380 com->delta_error_counts[errnum] = 0;
3381 mtx_unlock_spin(&sio_lock);
3384 total = com->error_counts[errnum] += delta;
3385 log(LOG_ERR, "sio%d: %u more %s%s (total %lu)\n",
3386 unit, delta, error_desc[errnum],
3387 delta == 1 ? "" : "s", total);
3393 /* commint is called when modem control line changes */
3395 commint(struct cdev *dev)
3397 register struct tty *tp;
3404 stat = com_tiocm_get(com);
3405 delta = com_tiocm_get_delta(com);
3407 if (com->state & CS_CTS_OFLOW) {
3408 if (stat & TIOCM_CTS)
3409 com->state |= CS_ODEVREADY;
3411 com->state &= ~CS_ODEVREADY;
3413 if ((delta & TIOCM_CAR) && (ISCALLOUT(dev)) == 0) {
3414 if (stat & TIOCM_CAR )
3415 (void)ttyld_modem(tp, 1);
3416 else if (ttyld_modem(tp, 0) == 0) {
3417 /* negate DTR, RTS */
3418 com_tiocm_bic(com, (tp->t_cflag & HUPCL) ?
3419 TIOCM_DTR|TIOCM_RTS|TIOCM_LE : TIOCM_LE );
3420 /* disable IENABLE */
3421 com_int_TxRx_disable( com );
3428 * Following are all routines needed for SIO to act as console
3439 * This is a function in order to not replicate "ttyd%d" more
3440 * places than absolutely necessary.
3443 siocnset(struct consdev *cd, int unit)
3447 sprintf(cd->cn_name, "ttyd%d", unit);
3450 static speed_t siocngetspeed(Port_t, u_long rclk);
3451 static void siocnclose(struct siocnstate *sp, Port_t iobase);
3452 static void siocnopen(struct siocnstate *sp, Port_t iobase, int speed);
3453 static void siocntxwait(Port_t iobase);
3455 static cn_probe_t siocnprobe;
3456 static cn_init_t siocninit;
3457 static cn_term_t siocnterm;
3458 static cn_checkc_t siocncheckc;
3459 static cn_getc_t siocngetc;
3460 static cn_putc_t siocnputc;
3462 CONS_DRIVER(sio, siocnprobe, siocninit, siocnterm, siocngetc, siocncheckc,
3472 * Wait for any pending transmission to finish. Required to avoid
3473 * the UART lockup bug when the speed is changed, and for normal
3477 while ((inb(iobase + com_lsr) & (LSR_TSRE | LSR_TXRDY))
3478 != (LSR_TSRE | LSR_TXRDY) && --timo != 0)
3483 * Read the serial port specified and try to figure out what speed
3484 * it's currently running at. We're assuming the serial port has
3485 * been initialized and is basicly idle. This routine is only intended
3486 * to be run at system startup.
3488 * If the value read from the serial port doesn't make sense, return 0.
3492 siocngetspeed(iobase, rclk)
3501 cfcr = inb(iobase + com_cfcr);
3502 outb(iobase + com_cfcr, CFCR_DLAB | cfcr);
3504 dlbl = inb(iobase + com_dlbl);
3505 dlbh = inb(iobase + com_dlbh);
3507 outb(iobase + com_cfcr, cfcr);
3509 divisor = dlbh << 8 | dlbl;
3511 /* XXX there should be more sanity checking. */
3514 return (rclk / (16UL * divisor));
3518 siocnopen(sp, iobase, speed)
3519 struct siocnstate *sp;
3528 * Save all the device control registers except the fifo register
3529 * and set our default ones (cs8 -parenb speed=comdefaultrate).
3530 * We can't save the fifo register since it is read-only.
3532 sp->ier = inb(iobase + com_ier);
3533 outb(iobase + com_ier, 0); /* spltty() doesn't stop siointr() */
3534 siocntxwait(iobase);
3535 sp->cfcr = inb(iobase + com_cfcr);
3536 outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS);
3537 sp->dlbl = inb(iobase + com_dlbl);
3538 sp->dlbh = inb(iobase + com_dlbh);
3540 * Only set the divisor registers if they would change, since on
3541 * some 16550 incompatibles (Startech), setting them clears the
3542 * data input register. This also reduces the effects of the
3545 divisor = siodivisor(comdefaultrclk, speed);
3546 dlbl = divisor & 0xFF;
3547 if (sp->dlbl != dlbl)
3548 outb(iobase + com_dlbl, dlbl);
3549 dlbh = divisor >> 8;
3550 if (sp->dlbh != dlbh)
3551 outb(iobase + com_dlbh, dlbh);
3552 outb(iobase + com_cfcr, CFCR_8BITS);
3553 sp->mcr = inb(iobase + com_mcr);
3555 * We don't want interrupts, but must be careful not to "disable"
3556 * them by clearing the MCR_IENABLE bit, since that might cause
3557 * an interrupt by floating the IRQ line.
3559 outb(iobase + com_mcr, (sp->mcr & MCR_IENABLE) | MCR_DTR | MCR_RTS);
3563 siocnclose(sp, iobase)
3564 struct siocnstate *sp;
3568 * Restore the device control registers.
3570 siocntxwait(iobase);
3571 outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS);
3572 if (sp->dlbl != inb(iobase + com_dlbl))
3573 outb(iobase + com_dlbl, sp->dlbl);
3574 if (sp->dlbh != inb(iobase + com_dlbh))
3575 outb(iobase + com_dlbh, sp->dlbh);
3576 outb(iobase + com_cfcr, sp->cfcr);
3578 * XXX damp oscillations of MCR_DTR and MCR_RTS by not restoring them.
3580 outb(iobase + com_mcr, sp->mcr | MCR_DTR | MCR_RTS);
3581 outb(iobase + com_ier, sp->ier);
3592 struct siocnstate sp;
3595 * Find our first enabled console, if any. If it is a high-level
3596 * console device, then initialize it and return successfully.
3597 * If it is a low-level console device, then initialize it and
3598 * return unsuccessfully. It must be initialized in both cases
3599 * for early use by console drivers and debuggers. Initializing
3600 * the hardware is not necessary in all cases, since the i/o
3601 * routines initialize it on the fly, but it is necessary if
3602 * input might arrive while the hardware is switched back to an
3603 * uninitialized state. We can't handle multiple console devices
3604 * yet because our low-level routines don't take a device arg.
3605 * We trust the user to set the console flags properly so that we
3606 * don't need to probe.
3608 cp->cn_pri = CN_DEAD;
3610 for (unit = 0; unit < 16; unit++) { /* XXX need to know how many */
3613 if (resource_disabled("sio", unit))
3615 if (resource_int_value("sio", unit, "flags", &flags))
3617 if (COM_CONSOLE(flags) || COM_DEBUGGER(flags)) {
3621 if (resource_int_value("sio", unit, "port", &port))
3625 if (boothowto & RB_SERIAL) {
3627 siocngetspeed(iobase, comdefaultrclk);
3629 comdefaultrate = boot_speed;
3633 * Initialize the divisor latch. We can't rely on
3634 * siocnopen() to do this the first time, since it
3635 * avoids writing to the latch if the latch appears
3636 * to have the correct value. Also, if we didn't
3637 * just read the speed from the hardware, then we
3638 * need to set the speed in hardware so that
3639 * switching it later is null.
3641 cfcr = inb(iobase + com_cfcr);
3642 outb(iobase + com_cfcr, CFCR_DLAB | cfcr);
3643 divisor = siodivisor(comdefaultrclk, comdefaultrate);
3644 outb(iobase + com_dlbl, divisor & 0xff);
3645 outb(iobase + com_dlbh, divisor >> 8);
3646 outb(iobase + com_cfcr, cfcr);
3648 siocnopen(&sp, iobase, comdefaultrate);
3651 if (COM_CONSOLE(flags) && !COM_LLCONSOLE(flags)) {
3653 cp->cn_pri = COM_FORCECONSOLE(flags)
3654 || boothowto & RB_SERIAL
3655 ? CN_REMOTE : CN_NORMAL;
3656 siocniobase = iobase;
3660 if (COM_DEBUGGER(flags))
3661 siogdbiobase = iobase;
3671 comconsole = cp->cn_unit;
3682 siocncheckc(struct consdev *cd)
3687 struct siocnstate sp;
3690 if (cd != NULL && cd->cn_unit == siocnunit) {
3691 iobase = siocniobase;
3692 speed = comdefaultrate;
3695 iobase = siogdbiobase;
3696 speed = gdbdefaultrate;
3702 siocnopen(&sp, iobase, speed);
3703 if (inb(iobase + com_lsr) & LSR_RXRDY)
3704 c = inb(iobase + com_data);
3707 siocnclose(&sp, iobase);
3713 siocngetc(struct consdev *cd)
3718 struct siocnstate sp;
3721 if (cd != NULL && cd->cn_unit == siocnunit) {
3722 iobase = siocniobase;
3723 speed = comdefaultrate;
3726 iobase = siogdbiobase;
3727 speed = gdbdefaultrate;
3733 siocnopen(&sp, iobase, speed);
3734 while (!(inb(iobase + com_lsr) & LSR_RXRDY))
3736 c = inb(iobase + com_data);
3737 siocnclose(&sp, iobase);
3743 siocnputc(struct consdev *cd, int c)
3747 struct siocnstate sp;
3751 if (cd != NULL && cd->cn_unit == siocnunit) {
3752 iobase = siocniobase;
3753 speed = comdefaultrate;
3756 iobase = siogdbiobase;
3757 speed = gdbdefaultrate;
3764 if (!kdb_active && sio_inited == 2 && !mtx_owned(&sio_lock)) {
3765 mtx_lock_spin(&sio_lock);
3768 siocnopen(&sp, iobase, speed);
3769 siocntxwait(iobase);
3770 outb(iobase + com_data, c);
3771 siocnclose(&sp, iobase);
3773 mtx_unlock_spin(&sio_lock);
3778 * Remote gdb(1) support.
3783 #include <gdb/gdb.h>
3785 static gdb_probe_f siogdbprobe;
3786 static gdb_init_f siogdbinit;
3787 static gdb_term_f siogdbterm;
3788 static gdb_getc_f siogdbgetc;
3789 static gdb_checkc_f siogdbcheckc;
3790 static gdb_putc_f siogdbputc;
3792 GDB_DBGPORT(sio, siogdbprobe, siogdbinit, siogdbterm, siogdbcheckc,
3793 siogdbgetc, siogdbputc);
3798 return ((siogdbiobase != 0) ? 0 : -1);
3820 return (siocncheckc(NULL));
3826 return (siocngetc(NULL));
3833 * pc98 local function
3836 com_tiocm_bis(struct com_s *com, int msr)
3842 com->pc98_prev_modem_status |= ( msr & (TIOCM_LE|TIOCM_DTR|TIOCM_RTS) );
3843 tmp |= CMD8251_TxEN|CMD8251_RxEN;
3844 if ( msr & TIOCM_DTR ) tmp |= CMD8251_DTR;
3845 if ( msr & TIOCM_RTS ) tmp |= CMD8251_RTS;
3847 pc98_i8251_or_cmd( com, tmp );
3852 com_tiocm_bic(struct com_s *com, int msr)
3858 com->pc98_prev_modem_status &= ~( msr & (TIOCM_LE|TIOCM_DTR|TIOCM_RTS) );
3859 if ( msr & TIOCM_DTR ) tmp |= CMD8251_DTR;
3860 if ( msr & TIOCM_RTS ) tmp |= CMD8251_RTS;
3862 pc98_i8251_clear_cmd( com, tmp );
3867 com_tiocm_get(struct com_s *com)
3869 return( com->pc98_prev_modem_status );
3873 com_tiocm_get_delta(struct com_s *com)
3877 tmp = com->pc98_modem_delta;
3878 com->pc98_modem_delta = 0;
3882 /* convert to TIOCM_?? ( ioctl.h ) */
3884 pc98_get_modem_status(struct com_s *com)
3888 msr = com->pc98_prev_modem_status
3889 & ~(TIOCM_CAR|TIOCM_RI|TIOCM_DSR|TIOCM_CTS);
3890 if (com->pc98_8251fifo_enable) {
3893 stat2 = inb(I8251F_msr);
3894 if ( stat2 & CICSCDF_CD ) msr |= TIOCM_CAR;
3895 if ( stat2 & CICSCDF_CI ) msr |= TIOCM_RI;
3896 if ( stat2 & CICSCDF_DR ) msr |= TIOCM_DSR;
3897 if ( stat2 & CICSCDF_CS ) msr |= TIOCM_CTS;
3898 #if COM_CARRIER_DETECT_EMULATE
3899 if ( msr & (TIOCM_DSR|TIOCM_CTS) ) {
3906 stat = inb(com->sts_port);
3907 stat2 = inb(com->in_modem_port);
3908 if ( !(stat2 & CICSCD_CD) ) msr |= TIOCM_CAR;
3909 if ( !(stat2 & CICSCD_CI) ) msr |= TIOCM_RI;
3910 if ( stat & STS8251_DSR ) msr |= TIOCM_DSR;
3911 if ( !(stat2 & CICSCD_CS) ) msr |= TIOCM_CTS;
3912 #if COM_CARRIER_DETECT_EMULATE
3913 if ( msr & (TIOCM_DSR|TIOCM_CTS) ) {
3922 pc98_check_msr(void* chan)
3926 register struct tty *tp;
3930 dev=(struct cdev *)chan;
3935 msr = pc98_get_modem_status(com);
3936 /* make change flag */
3937 delta = msr ^ com->pc98_prev_modem_status;
3938 if ( delta & TIOCM_CAR ) {
3939 if ( com->modem_car_chg_timer ) {
3940 if ( -- com->modem_car_chg_timer )
3943 if ((com->modem_car_chg_timer = (msr & TIOCM_CAR) ?
3944 DCD_ON_RECOGNITION : DCD_OFF_TOLERANCE) != 0)
3948 com->modem_car_chg_timer = 0;
3949 delta = ( msr ^ com->pc98_prev_modem_status ) &
3950 (TIOCM_CAR|TIOCM_RI|TIOCM_DSR|TIOCM_CTS);
3951 com->pc98_prev_modem_status = msr;
3952 delta = ( com->pc98_modem_delta |= delta );
3954 if ( com->modem_checking || (tp->t_state & (TS_ISOPEN)) ) {
3958 timeout(pc98_check_msr, (caddr_t)dev,
3959 PC98_CHECK_MODEM_INTERVAL);
3961 com->modem_checking = 0;
3966 pc98_msrint_start(struct cdev *dev)
3972 /* modem control line check routine envoke interval is 1/10 sec */
3973 if ( com->modem_checking == 0 ) {
3974 com->pc98_prev_modem_status = pc98_get_modem_status(com);
3975 com->pc98_modem_delta = 0;
3976 timeout(pc98_check_msr, (caddr_t)dev,
3977 PC98_CHECK_MODEM_INTERVAL);
3978 com->modem_checking = 1;
3984 pc98_disable_i8251_interrupt(struct com_s *com, int mod)
3986 /* disable interrupt */
3989 mod |= ~(IEN_Tx|IEN_TxEMP|IEN_Rx);
3991 tmp = inb( com->intr_ctrl_port ) & ~(IEN_Tx|IEN_TxEMP|IEN_Rx);
3992 outb( com->intr_ctrl_port, (com->intr_enable&=~mod) | tmp );
3997 pc98_enable_i8251_interrupt(struct com_s *com, int mod)
4002 tmp = inb( com->intr_ctrl_port ) & ~(IEN_Tx|IEN_TxEMP|IEN_Rx);
4003 outb( com->intr_ctrl_port, (com->intr_enable|=mod) | tmp );
4008 pc98_check_i8251_interrupt(struct com_s *com)
4010 return ( com->intr_enable & 0x07 );
4014 pc98_i8251_clear_cmd(struct com_s *com, int x)
4019 tmp = com->pc98_prev_siocmd & ~(x);
4020 if (com->pc98_8251fifo_enable)
4021 outb(I8251F_fcr, 0);
4022 outb(com->cmd_port, tmp);
4023 com->pc98_prev_siocmd = tmp & ~(CMD8251_ER|CMD8251_RESET|CMD8251_EH);
4024 if (com->pc98_8251fifo_enable)
4025 outb(I8251F_fcr, CTRL8251F_ENABLE);
4030 pc98_i8251_or_cmd(struct com_s *com, int x)
4035 if (com->pc98_8251fifo_enable)
4036 outb(I8251F_fcr, 0);
4037 tmp = com->pc98_prev_siocmd | (x);
4038 outb(com->cmd_port, tmp);
4039 com->pc98_prev_siocmd = tmp & ~(CMD8251_ER|CMD8251_RESET|CMD8251_EH);
4040 if (com->pc98_8251fifo_enable)
4041 outb(I8251F_fcr, CTRL8251F_ENABLE);
4046 pc98_i8251_set_cmd(struct com_s *com, int x)
4051 if (com->pc98_8251fifo_enable)
4052 outb(I8251F_fcr, 0);
4054 outb(com->cmd_port, tmp);
4055 com->pc98_prev_siocmd = tmp & ~(CMD8251_ER|CMD8251_RESET|CMD8251_EH);
4056 if (com->pc98_8251fifo_enable)
4057 outb(I8251F_fcr, CTRL8251F_ENABLE);
4062 pc98_i8251_clear_or_cmd(struct com_s *com, int clr, int x)
4066 if (com->pc98_8251fifo_enable)
4067 outb(I8251F_fcr, 0);
4068 tmp = com->pc98_prev_siocmd & ~(clr);
4070 outb(com->cmd_port, tmp);
4071 com->pc98_prev_siocmd = tmp & ~(CMD8251_ER|CMD8251_RESET|CMD8251_EH);
4072 if (com->pc98_8251fifo_enable)
4073 outb(I8251F_fcr, CTRL8251F_ENABLE);
4078 pc98_i8251_get_cmd(struct com_s *com)
4080 return com->pc98_prev_siocmd;
4084 pc98_i8251_get_mod(struct com_s *com)
4086 return com->pc98_prev_siomod;
4090 pc98_i8251_reset(struct com_s *com, int mode, int command)
4092 if (com->pc98_8251fifo_enable)
4093 outb(I8251F_fcr, 0);
4094 outb(com->cmd_port, 0); /* dummy */
4096 outb(com->cmd_port, 0); /* dummy */
4098 outb(com->cmd_port, 0); /* dummy */
4100 outb(com->cmd_port, CMD8251_RESET); /* internal reset */
4102 outb(com->cmd_port, mode ); /* mode register */
4103 com->pc98_prev_siomod = mode;
4105 pc98_i8251_set_cmd( com, (command|CMD8251_ER) );
4107 if (com->pc98_8251fifo_enable)
4108 outb(I8251F_fcr, CTRL8251F_ENABLE |
4109 CTRL8251F_XMT_RST | CTRL8251F_RCV_RST);
4113 pc98_check_sysclock(void)
4115 /* get system clock from port */
4116 if ( pc98_machine_type & M_8M ) {
4117 /* 8 MHz system & H98 */
4126 com_cflag_and_speed_set( struct com_s *com, int cflag, int speed)
4133 if (pc98_ttspeedtab(com, speed, &count) != 0)
4136 previnterrupt = pc98_check_i8251_interrupt(com);
4137 pc98_disable_i8251_interrupt( com, IEN_Tx|IEN_TxEMP|IEN_Rx );
4139 switch ( cflag&CSIZE ) {
4141 cfcr = MOD8251_5BITS; break;
4143 cfcr = MOD8251_6BITS; break;
4145 cfcr = MOD8251_7BITS; break;
4147 cfcr = MOD8251_8BITS; break;
4149 if ( cflag&PARENB ) {
4151 cfcr |= MOD8251_PODD;
4153 cfcr |= MOD8251_PEVEN;
4155 cfcr |= MOD8251_PDISAB;
4158 cfcr |= MOD8251_STOP2;
4160 cfcr |= MOD8251_STOP1;
4162 if ( count & 0x10000 )
4163 cfcr |= MOD8251_CLKX1;
4165 cfcr |= MOD8251_CLKX16;
4167 while (!((tmp = inb(com->sts_port)) & STS8251_TxEMP))
4170 /* set baud rate from ospeed */
4171 pc98_set_baud_rate( com, count );
4173 if ( cfcr != pc98_i8251_get_mod(com) )
4174 pc98_i8251_reset(com, cfcr, pc98_i8251_get_cmd(com) );
4176 pc98_enable_i8251_interrupt( com, previnterrupt );
4180 pc98_ttspeedtab(struct com_s *com, int speed, u_int *divisor)
4182 int if_type, effect_sp, count = -1, mod;
4184 if_type = com->pc98_if_type & 0x0f;
4186 switch (com->pc98_if_type) {
4187 case COM_IF_INTERNAL:
4188 if (PC98SIO_baud_rate_port(if_type) != -1) {
4189 count = ttspeedtab(speed, if_8251_type[if_type].speedtab);
4191 count |= COM1_EXT_CLOCK;
4196 /* for *1CLK asynchronous! mode, TEFUTEFU */
4197 mod = (sysclock == 5) ? 2457600 : 1996800;
4198 effect_sp = ttspeedtab( speed, pc98speedtab );
4199 if ( effect_sp < 0 ) /* XXX */
4200 effect_sp = ttspeedtab( (speed - 1), pc98speedtab );
4201 if ( effect_sp <= 0 )
4203 if ( effect_sp == speed )
4205 if ( mod % effect_sp )
4207 count = mod / effect_sp;
4208 if ( count > 65535 )
4210 if ( effect_sp != speed )
4213 case COM_IF_PC9861K_1:
4214 case COM_IF_PC9861K_2:
4217 case COM_IF_IND_SS_1:
4218 case COM_IF_IND_SS_2:
4219 case COM_IF_PIO9032B_1:
4220 case COM_IF_PIO9032B_2:
4221 count = ttspeedtab( speed, if_8251_type[if_type].speedtab );
4223 case COM_IF_B98_01_1:
4224 case COM_IF_B98_01_2:
4225 count = ttspeedtab( speed, if_8251_type[if_type].speedtab );
4227 if (count == 0 || count == 1) {
4229 count |= 0x20000; /* x1 mode for 76800 and 153600 */
4238 *divisor = (u_int) count;
4243 pc98_set_baud_rate( struct com_s *com, u_int count )
4247 if_type = com->pc98_if_type & 0x0f;
4248 io = rman_get_start(com->ioportres) & 0xff00;
4250 switch (com->pc98_if_type) {
4251 case COM_IF_INTERNAL:
4252 if (PC98SIO_baud_rate_port(if_type) != -1) {
4253 if (count & COM1_EXT_CLOCK) {
4254 outb((Port_t)PC98SIO_baud_rate_port(if_type), count & 0xff);
4257 outb((Port_t)PC98SIO_baud_rate_port(if_type), 0x09);
4271 outb( 0x75, count & 0xff );
4273 outb( 0x75, (count >> 8) & 0xff );
4276 case COM_IF_IND_SS_1:
4277 case COM_IF_IND_SS_2:
4278 outb(io | PC98SIO_intr_ctrl_port(if_type), 0);
4279 outb(io | PC98SIO_baud_rate_port(if_type), 0);
4280 outb(io | PC98SIO_baud_rate_port(if_type), 0xc0);
4281 outb(io | PC98SIO_baud_rate_port(if_type), (count >> 8) | 0x80);
4282 outb(io | PC98SIO_baud_rate_port(if_type), count & 0xff);
4284 case COM_IF_PIO9032B_1:
4285 case COM_IF_PIO9032B_2:
4286 outb(io | PC98SIO_baud_rate_port(if_type), count);
4288 case COM_IF_B98_01_1:
4289 case COM_IF_B98_01_2:
4290 outb(io | PC98SIO_baud_rate_port(if_type), count & 0x0f);
4293 * Some old B98_01 board should be controlled
4294 * in different way, but this hasn't been tested yet.
4296 outb(io | PC98SIO_func_port(if_type),
4297 (count & 0x20000) ? 0xf0 : 0xf2);
4303 pc98_check_if_type(device_t dev, struct siodev *iod)
4305 int irr, io, if_type, tmp;
4306 static short irq_tab[2][8] = {
4307 { 3, 5, 6, 9, 10, 12, 13, -1},
4308 { 3, 10, 12, 13, 5, 6, 9, -1}
4311 if_type = iod->if_type & 0x0f;
4313 io = isa_get_port(dev) & 0xff00;
4315 if (IS_8251(iod->if_type)) {
4316 if (PC98SIO_func_port(if_type) != -1) {
4317 outb(io | PC98SIO_func_port(if_type), 0xf2);
4318 tmp = ttspeedtab(9600, if_8251_type[if_type].speedtab);
4319 if (tmp != -1 && PC98SIO_baud_rate_port(if_type) != -1)
4320 outb(io | PC98SIO_baud_rate_port(if_type), tmp);
4323 iod->cmd = io | PC98SIO_cmd_port(if_type);
4324 iod->sts = io | PC98SIO_sts_port(if_type);
4325 iod->mod = io | PC98SIO_in_modem_port(if_type);
4326 iod->ctrl = io | PC98SIO_intr_ctrl_port(if_type);
4328 if (iod->if_type == COM_IF_INTERNAL) {
4331 if (pc98_check_8251vfast()) {
4332 PC98SIO_baud_rate_port(if_type) = I8251F_div;
4333 if_8251_type[if_type].speedtab = pc98fast_speedtab;
4336 tmp = inb( iod->mod ) & if_8251_type[if_type].irr_mask;
4337 if ((isa_get_port(dev) & 0xff) == IO_COM2)
4338 iod->irq = irq_tab[0][tmp];
4340 iod->irq = irq_tab[1][tmp];
4343 irr = if_16550a_type[if_type].irr_read;
4344 #ifdef COM_MULTIPORT
4345 if (!COM_ISMULTIPORT(device_get_flags(dev)) ||
4346 device_get_unit(dev) == COM_MPMASTER(device_get_flags(dev)))
4349 tmp = inb(io | irr);
4350 if (isa_get_port(dev) & 0x01) /* XXX depend on RSB-384 */
4351 iod->irq = irq_tab[1][tmp >> 3];
4353 iod->irq = irq_tab[0][tmp & 0x07];
4356 if ( iod->irq == -1 ) return -1;
4361 pc98_set_ioport(struct com_s *com)
4363 int if_type = com->pc98_if_type & 0x0f;
4364 Port_t io = rman_get_start(com->ioportres) & 0xff00;
4366 pc98_check_sysclock();
4367 com->data_port = io | PC98SIO_data_port(if_type);
4368 com->cmd_port = io | PC98SIO_cmd_port(if_type);
4369 com->sts_port = io | PC98SIO_sts_port(if_type);
4370 com->in_modem_port = io | PC98SIO_in_modem_port(if_type);
4371 com->intr_ctrl_port = io | PC98SIO_intr_ctrl_port(if_type);
4374 pc98_check_8251vfast(void)
4378 outb(I8251F_div, 0x8c);
4380 for (i = 0; i < 100; i++) {
4381 if ((inb(I8251F_div) & 0x80) != 0) {
4387 outb(I8251F_div, 0);
4389 for (; i < 100; i++) {
4390 if ((inb(I8251F_div) & 0x80) == 0)
4398 pc98_check_8251fifo(void)
4402 tmp1 = inb(I8251F_iir);
4404 tmp2 = inb(I8251F_iir);
4405 if (((tmp1 ^ tmp2) & 0x40) != 0 && ((tmp1 | tmp2) & 0x20) == 0)
4410 #endif /* PC98 defined */