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freebsd-skq/sys/pc98/cbus/sio.c
Matthew D Fleming e7ceb1e99b Based on discussions on the svn-src mailing list, rework r218195: 
- entirely eliminate some calls to uio_yeild() as being unnecessary,
   such as in a sysctl handler.

 - move should_yield() and maybe_yield() to kern_synch.c and move the
   prototypes from sys/uio.h to sys/proc.h

 - add a slightly more generic kern_yield() that can replace the
   functionality of uio_yield().

 - replace source uses of uio_yield() with the functional equivalent,
   or in some cases do not change the thread priority when switching.

 - fix a logic inversion bug in vlrureclaim(), pointed out by bde@.

 - instead of using the per-cpu last switched ticks, use a per thread
   variable for should_yield().  With PREEMPTION, the only reasonable
   use of this is to determine if a lock has been held a long time and
   relinquish it.  Without PREEMPTION, this is essentially the same as
   the per-cpu variable.
2011-02-08 00:16:36 +00:00

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/*-
* Copyright (c) 1991 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
* from: @(#)com.c 7.5 (Berkeley) 5/16/91
* from: i386/isa sio.c,v 1.234
*/
#include "opt_comconsole.h"
#include "opt_compat.h"
#include "opt_gdb.h"
#include "opt_kdb.h"
#include "opt_sio.h"
/*
* Serial driver, based on 386BSD-0.1 com driver.
* Mostly rewritten to use pseudo-DMA.
* Works for National Semiconductor NS8250-NS16550AF UARTs.
* COM driver, based on HP dca driver.
*
* Changes for PC Card integration:
* - Added PC Card driver table and handlers
*/
/*===============================================================
* 386BSD(98),FreeBSD-1.1x(98) com driver.
* -----
* modified for PC9801 by M.Ishii
* Kyoto University Microcomputer Club (KMC)
* Chou "TEFUTEFU" Hirotomi
* Kyoto Univ. the faculty of medicine
*===============================================================
* FreeBSD-2.0.1(98) sio driver.
* -----
* modified for pc98 Internal i8251 and MICRO CORE MC16550II
* T.Koike(hfc01340@niftyserve.or.jp)
* implement kernel device configuration
* aizu@orient.center.nitech.ac.jp
*
* Notes.
* -----
* PC98 localization based on 386BSD(98) com driver. Using its PC98 local
* functions.
* This driver is under debugging,has bugs.
*/
/*
* modified for AIWA B98-01
* by T.Hatanou <hatanou@yasuda.comm.waseda.ac.jp> last update: 15 Sep.1995
*/
/*
* Modified by Y.Takahashi of Kogakuin University.
*/
/*
* modified for 8251(FIFO) by Seigo TANIMURA <tanimura@FreeBSD.org>
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/fcntl.h>
#include <sys/interrupt.h>
#include <sys/kdb.h>
#include <sys/kernel.h>
#include <sys/limits.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/reboot.h>
#include <sys/serial.h>
#include <sys/sysctl.h>
#include <sys/syslog.h>
#include <sys/tty.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <sys/timepps.h>
#include <sys/uio.h>
#include <sys/cons.h>
#include <isa/isavar.h>
#include <machine/resource.h>
#include <dev/sio/sioreg.h>
#include <dev/sio/siovar.h>
#ifdef PC98
#include <pc98/cbus/cbus.h>
#include <pc98/pc98/pc98_machdep.h>
#endif
#ifdef COM_ESP
#include <dev/ic/esp.h>
#endif
#include <dev/ic/ns16550.h>
#ifdef PC98
#include <dev/ic/i8251.h>
#include <dev/ic/i8255.h>
#include <dev/ic/rsa.h>
#endif
#define LOTS_OF_EVENTS 64 /* helps separate urgent events from input */
/*
* Meaning of flags:
*
* 0x00000001 shared IRQs
* 0x00000002 disable FIFO
* 0x00000008 recover sooner from lost output interrupts
* 0x00000010 device is potential system console
* 0x00000020 device is forced to become system console
* 0x00000040 device is reserved for low-level IO
* 0x00000080 use this port for remote kernel debugging
* 0x0000??00 minor number of master port
* 0x00010000 PPS timestamping on CTS instead of DCD
* 0x00080000 IIR_TXRDY bug
* 0x00400000 If no comconsole found then mark as a comconsole
* 0x1?000000 interface type
*/
#ifdef COM_MULTIPORT
/* checks in flags for multiport and which is multiport "master chip"
* for a given card
*/
#define COM_ISMULTIPORT(flags) ((flags) & 0x01)
#define COM_MPMASTER(flags) (((flags) >> 8) & 0x0ff)
#ifndef PC98
#define COM_NOTAST4(flags) ((flags) & 0x04)
#endif
#else
#define COM_ISMULTIPORT(flags) (0)
#endif /* COM_MULTIPORT */
#define COM_C_IIR_TXRDYBUG 0x80000
#define COM_CONSOLE(flags) ((flags) & 0x10)
#define COM_DEBUGGER(flags) ((flags) & 0x80)
#ifndef PC98
#define COM_FIFOSIZE(flags) (((flags) & 0xff000000) >> 24)
#endif
#define COM_FORCECONSOLE(flags) ((flags) & 0x20)
#define COM_IIR_TXRDYBUG(flags) ((flags) & COM_C_IIR_TXRDYBUG)
#define COM_LLCONSOLE(flags) ((flags) & 0x40)
#define COM_LOSESOUTINTS(flags) ((flags) & 0x08)
#define COM_NOFIFO(flags) ((flags) & 0x02)
#ifndef PC98
#define COM_NOSCR(flags) ((flags) & 0x100000)
#endif
#define COM_PPSCTS(flags) ((flags) & 0x10000)
#ifndef PC98
#define COM_ST16650A(flags) ((flags) & 0x20000)
#define COM_TI16754(flags) ((flags) & 0x200000)
#endif
#define sio_getreg(com, off) \
(bus_space_read_1((com)->bst, (com)->bsh, (off)))
#define sio_setreg(com, off, value) \
(bus_space_write_1((com)->bst, (com)->bsh, (off), (value)))
/*
* com state bits.
* (CS_BUSY | CS_TTGO) and (CS_BUSY | CS_TTGO | CS_ODEVREADY) must be higher
* than the other bits so that they can be tested as a group without masking
* off the low bits.
*
* The following com and tty flags correspond closely:
* CS_BUSY = TS_BUSY (maintained by comstart(), siopoll() and
* comstop())
* CS_TTGO = ~TS_TTSTOP (maintained by comparam() and comstart())
* CS_CTS_OFLOW = CCTS_OFLOW (maintained by comparam())
* CS_RTS_IFLOW = CRTS_IFLOW (maintained by comparam())
* TS_FLUSH is not used.
* XXX I think TIOCSETA doesn't clear TS_TTSTOP when it clears IXON.
* XXX CS_*FLOW should be CF_*FLOW in com->flags (control flags not state).
*/
#define CS_BUSY 0x80 /* output in progress */
#define CS_TTGO 0x40 /* output not stopped by XOFF */
#define CS_ODEVREADY 0x20 /* external device h/w ready (CTS) */
#define CS_CHECKMSR 1 /* check of MSR scheduled */
#define CS_CTS_OFLOW 2 /* use CTS output flow control */
#define CS_ODONE 4 /* output completed */
#define CS_RTS_IFLOW 8 /* use RTS input flow control */
#define CSE_BUSYCHECK 1 /* siobusycheck() scheduled */
static char const * const error_desc[] = {
#define CE_OVERRUN 0
"silo overflow",
#define CE_INTERRUPT_BUF_OVERFLOW 1
"interrupt-level buffer overflow",
#define CE_TTY_BUF_OVERFLOW 2
"tty-level buffer overflow",
};
#define CE_NTYPES 3
#define CE_RECORD(com, errnum) (++(com)->delta_error_counts[errnum])
/* types. XXX - should be elsewhere */
typedef u_int Port_t; /* hardware port */
typedef u_char bool_t; /* boolean */
/* queue of linear buffers */
struct lbq {
u_char *l_head; /* next char to process */
u_char *l_tail; /* one past the last char to process */
struct lbq *l_next; /* next in queue */
bool_t l_queued; /* nonzero if queued */
};
/* com device structure */
struct com_s {
u_char state; /* miscellaneous flag bits */
u_char cfcr_image; /* copy of value written to CFCR */
#ifdef COM_ESP
bool_t esp; /* is this unit a hayes esp board? */
#endif
u_char extra_state; /* more flag bits, separate for order trick */
u_char fifo_image; /* copy of value written to FIFO */
bool_t hasfifo; /* nonzero for 16550 UARTs */
bool_t loses_outints; /* nonzero if device loses output interrupts */
u_char mcr_image; /* copy of value written to MCR */
#ifdef COM_MULTIPORT
bool_t multiport; /* is this unit part of a multiport device? */
#endif /* COM_MULTIPORT */
bool_t no_irq; /* nonzero if irq is not attached */
bool_t gone; /* hardware disappeared */
bool_t poll; /* nonzero if polling is required */
bool_t poll_output; /* nonzero if polling for output is required */
bool_t st16650a; /* nonzero if Startech 16650A compatible */
int unit; /* unit number */
u_int flags; /* copy of device flags */
u_int tx_fifo_size;
/*
* The high level of the driver never reads status registers directly
* because there would be too many side effects to handle conveniently.
* Instead, it reads copies of the registers stored here by the
* interrupt handler.
*/
u_char last_modem_status; /* last MSR read by intr handler */
u_char prev_modem_status; /* last MSR handled by high level */
u_char *ibuf; /* start of input buffer */
u_char *ibufend; /* end of input buffer */
u_char *ibufold; /* old input buffer, to be freed */
u_char *ihighwater; /* threshold in input buffer */
u_char *iptr; /* next free spot in input buffer */
int ibufsize; /* size of ibuf (not include error bytes) */
int ierroff; /* offset of error bytes in ibuf */
struct lbq obufq; /* head of queue of output buffers */
struct lbq obufs[2]; /* output buffers */
bus_space_tag_t bst;
bus_space_handle_t bsh;
#ifdef PC98
Port_t cmd_port;
Port_t sts_port;
Port_t in_modem_port;
Port_t intr_ctrl_port;
Port_t rsabase; /* Iobase address of an I/O-DATA RSA board. */
int intr_enable;
int pc98_prev_modem_status;
int pc98_modem_delta;
int modem_car_chg_timer;
int pc98_prev_siocmd;
int pc98_prev_siomod;
int modem_checking;
int pc98_if_type;
bool_t pc98_8251fifo;
bool_t pc98_8251fifo_enable;
#endif /* PC98 */
Port_t data_port; /* i/o ports */
#ifdef COM_ESP
Port_t esp_port;
#endif
Port_t int_ctl_port;
Port_t int_id_port;
Port_t modem_ctl_port;
Port_t line_status_port;
Port_t modem_status_port;
struct tty *tp; /* cross reference */
struct pps_state pps;
int pps_bit;
#ifdef ALT_BREAK_TO_DEBUGGER
int alt_brk_state;
#endif
u_long bytes_in; /* statistics */
u_long bytes_out;
u_int delta_error_counts[CE_NTYPES];
u_long error_counts[CE_NTYPES];
u_long rclk;
struct resource *irqres;
struct resource *ioportres;
int ioportrid;
void *cookie;
/*
* Data area for output buffers. Someday we should build the output
* buffer queue without copying data.
*/
#ifdef PC98
int obufsize;
u_char *obuf1;
u_char *obuf2;
#else
u_char obuf1[256];
u_char obuf2[256];
#endif
};
#ifdef COM_ESP
static int espattach(struct com_s *com, Port_t esp_port);
#endif
static void combreak(struct tty *tp, int sig);
static timeout_t siobusycheck;
static u_int siodivisor(u_long rclk, speed_t speed);
static void comclose(struct tty *tp);
static int comopen(struct tty *tp, struct cdev *dev);
static void sioinput(struct com_s *com);
static void siointr1(struct com_s *com);
static int siointr(void *arg);
static int commodem(struct tty *tp, int sigon, int sigoff);
static int comparam(struct tty *tp, struct termios *t);
static void siopoll(void *);
static void siosettimeout(void);
static int siosetwater(struct com_s *com, speed_t speed);
static void comstart(struct tty *tp);
static void comstop(struct tty *tp, int rw);
static timeout_t comwakeup;
char sio_driver_name[] = "sio";
static struct mtx sio_lock;
static int sio_inited;
/* table and macro for fast conversion from a unit number to its com struct */
devclass_t sio_devclass;
#define com_addr(unit) ((struct com_s *) \
devclass_get_softc(sio_devclass, unit)) /* XXX */
int comconsole = -1;
static volatile speed_t comdefaultrate = CONSPEED;
static u_long comdefaultrclk = DEFAULT_RCLK;
SYSCTL_ULONG(_machdep, OID_AUTO, conrclk, CTLFLAG_RW, &comdefaultrclk, 0, "");
static speed_t gdbdefaultrate = GDBSPEED;
SYSCTL_UINT(_machdep, OID_AUTO, gdbspeed, CTLFLAG_RW,
&gdbdefaultrate, GDBSPEED, "");
static u_int com_events; /* input chars + weighted output completions */
static Port_t siocniobase;
static int siocnunit = -1;
static void *sio_slow_ih;
static void *sio_fast_ih;
static int sio_timeout;
static int sio_timeouts_until_log;
static struct callout_handle sio_timeout_handle
= CALLOUT_HANDLE_INITIALIZER(&sio_timeout_handle);
static int sio_numunits;
#ifdef PC98
struct siodev {
short if_type;
short irq;
Port_t cmd, sts, ctrl, mod;
};
static int sysclock;
#define COM_INT_DISABLE {int previpri; previpri=spltty();
#define COM_INT_ENABLE splx(previpri);}
#define IEN_TxFLAG IEN_Tx
#define COM_CARRIER_DETECT_EMULATE 0
#define PC98_CHECK_MODEM_INTERVAL (hz/10)
#define DCD_OFF_TOLERANCE 2
#define DCD_ON_RECOGNITION 2
#define IS_8251(if_type) (!(if_type & 0x10))
#define COM1_EXT_CLOCK 0x40000
static void commint(struct cdev *dev);
static void com_tiocm_bis(struct com_s *com, int msr);
static void com_tiocm_bic(struct com_s *com, int msr);
static int com_tiocm_get(struct com_s *com);
static int com_tiocm_get_delta(struct com_s *com);
static void pc98_msrint_start(struct cdev *dev);
static void com_cflag_and_speed_set(struct com_s *com, int cflag, int speed);
static int pc98_ttspeedtab(struct com_s *com, int speed, u_int *divisor);
static int pc98_get_modem_status(struct com_s *com);
static timeout_t pc98_check_msr;
static void pc98_set_baud_rate(struct com_s *com, u_int count);
static void pc98_i8251_reset(struct com_s *com, int mode, int command);
static void pc98_disable_i8251_interrupt(struct com_s *com, int mod);
static void pc98_enable_i8251_interrupt(struct com_s *com, int mod);
static int pc98_check_i8251_interrupt(struct com_s *com);
static int pc98_i8251_get_cmd(struct com_s *com);
static int pc98_i8251_get_mod(struct com_s *com);
static void pc98_i8251_set_cmd(struct com_s *com, int x);
static void pc98_i8251_or_cmd(struct com_s *com, int x);
static void pc98_i8251_clear_cmd(struct com_s *com, int x);
static void pc98_i8251_clear_or_cmd(struct com_s *com, int clr, int x);
static int pc98_check_if_type(device_t dev, struct siodev *iod);
static int pc98_check_8251vfast(void);
static int pc98_check_8251fifo(void);
static void pc98_check_sysclock(void);
static void pc98_set_ioport(struct com_s *com);
#define com_int_Tx_disable(com) \
pc98_disable_i8251_interrupt(com,IEN_Tx|IEN_TxEMP)
#define com_int_Tx_enable(com) \
pc98_enable_i8251_interrupt(com,IEN_TxFLAG)
#define com_int_Rx_disable(com) \
pc98_disable_i8251_interrupt(com,IEN_Rx)
#define com_int_Rx_enable(com) \
pc98_enable_i8251_interrupt(com,IEN_Rx)
#define com_int_TxRx_disable(com) \
pc98_disable_i8251_interrupt(com,IEN_Tx|IEN_TxEMP|IEN_Rx)
#define com_int_TxRx_enable(com) \
pc98_enable_i8251_interrupt(com,IEN_TxFLAG|IEN_Rx)
#define com_send_break_on(com) \
(IS_8251((com)->pc98_if_type) ? \
pc98_i8251_or_cmd((com), CMD8251_SBRK) : \
sio_setreg((com), com_cfcr, (com)->cfcr_image |= CFCR_SBREAK))
#define com_send_break_off(com) \
(IS_8251((com)->pc98_if_type) ? \
pc98_i8251_clear_cmd((com), CMD8251_SBRK) : \
sio_setreg((com), com_cfcr, (com)->cfcr_image &= ~CFCR_SBREAK))
static struct speedtab pc98speedtab[] = { /* internal RS232C interface */
{ 0, 0, },
{ 50, 50, },
{ 75, 75, },
{ 150, 150, },
{ 200, 200, },
{ 300, 300, },
{ 600, 600, },
{ 1200, 1200, },
{ 2400, 2400, },
{ 4800, 4800, },
{ 9600, 9600, },
{ 19200, 19200, },
{ 38400, 38400, },
{ 51200, 51200, },
{ 76800, 76800, },
{ 20800, 20800, },
{ 31200, 31200, },
{ 41600, 41600, },
{ 62400, 62400, },
{ -1, -1 }
};
static struct speedtab pc98fast_speedtab[] = {
{ 9600, 0x80 | (DEFAULT_RCLK / (16 * (9600))), },
{ 19200, 0x80 | (DEFAULT_RCLK / (16 * (19200))), },
{ 38400, 0x80 | (DEFAULT_RCLK / (16 * (38400))), },
{ 57600, 0x80 | (DEFAULT_RCLK / (16 * (57600))), },
{ 115200, 0x80 | (DEFAULT_RCLK / (16 * (115200))), },
{ -1, -1 }
};
static struct speedtab comspeedtab_pio9032b[] = {
{ 300, 6, },
{ 600, 5, },
{ 1200, 4, },
{ 2400, 3, },
{ 4800, 2, },
{ 9600, 1, },
{ 19200, 0, },
{ 38400, 7, },
{ -1, -1 }
};
static struct speedtab comspeedtab_b98_01[] = {
{ 75, 11, },
{ 150, 10, },
{ 300, 9, },
{ 600, 8, },
{ 1200, 7, },
{ 2400, 6, },
{ 4800, 5, },
{ 9600, 4, },
{ 19200, 3, },
{ 38400, 2, },
{ 76800, 1, },
{ 153600, 0, },
{ -1, -1 }
};
static struct speedtab comspeedtab_ind[] = {
{ 300, 1536, },
{ 600, 768, },
{ 1200, 384, },
{ 2400, 192, },
{ 4800, 96, },
{ 9600, 48, },
{ 19200, 24, },
{ 38400, 12, },
{ 57600, 8, },
{ 115200, 4, },
{ 153600, 3, },
{ 230400, 2, },
{ 460800, 1, },
{ -1, -1 }
};
struct {
char *name;
short port_table[7];
short irr_mask;
struct speedtab *speedtab;
short check_irq;
} if_8251_type[] = {
/* COM_IF_INTERNAL */
{ " (internal)", {0x30, 0x32, 0x32, 0x33, 0x35, -1, -1},
-1, pc98speedtab, 1 },
/* COM_IF_PC9861K_1 */
{ " (PC9861K)", {0xb1, 0xb3, 0xb3, 0xb0, 0xb0, -1, -1},
3, NULL, 1 },
/* COM_IF_PC9861K_2 */
{ " (PC9861K)", {0xb9, 0xbb, 0xbb, 0xb2, 0xb2, -1, -1},
3, NULL, 1 },
/* COM_IF_IND_SS_1 */
{ " (IND-SS)", {0xb1, 0xb3, 0xb3, 0xb0, 0xb0, 0xb3, -1},
3, comspeedtab_ind, 1 },
/* COM_IF_IND_SS_2 */
{ " (IND-SS)", {0xb9, 0xbb, 0xbb, 0xb2, 0xb2, 0xbb, -1},
3, comspeedtab_ind, 1 },
/* COM_IF_PIO9032B_1 */
{ " (PIO9032B)", {0xb1, 0xb3, 0xb3, 0xb0, 0xb0, 0xb8, -1},
7, comspeedtab_pio9032b, 1 },
/* COM_IF_PIO9032B_2 */
{ " (PIO9032B)", {0xb9, 0xbb, 0xbb, 0xb2, 0xb2, 0xba, -1},
7, comspeedtab_pio9032b, 1 },
/* COM_IF_B98_01_1 */
{ " (B98-01)", {0xb1, 0xb3, 0xb3, 0xb0, 0xb0, 0xd1, 0xd3},
7, comspeedtab_b98_01, 0 },
/* COM_IF_B98_01_2 */
{ " (B98-01)", {0xb9, 0xbb, 0xbb, 0xb2, 0xb2, 0xd5, 0xd7},
7, comspeedtab_b98_01, 0 },
};
#define PC98SIO_data_port(type) (if_8251_type[type].port_table[0])
#define PC98SIO_cmd_port(type) (if_8251_type[type].port_table[1])
#define PC98SIO_sts_port(type) (if_8251_type[type].port_table[2])
#define PC98SIO_in_modem_port(type) (if_8251_type[type].port_table[3])
#define PC98SIO_intr_ctrl_port(type) (if_8251_type[type].port_table[4])
#define PC98SIO_baud_rate_port(type) (if_8251_type[type].port_table[5])
#define PC98SIO_func_port(type) (if_8251_type[type].port_table[6])
#define I8251F_data 0x130
#define I8251F_lsr 0x132
#define I8251F_msr 0x134
#define I8251F_iir 0x136
#define I8251F_fcr 0x138
#define I8251F_div 0x13a
static bus_addr_t port_table_0[] =
{0x000, 0x001, 0x002, 0x003, 0x004, 0x005, 0x006, 0x007};
static bus_addr_t port_table_1[] =
{0x000, 0x002, 0x004, 0x006, 0x008, 0x00a, 0x00c, 0x00e};
static bus_addr_t port_table_8[] =
{0x000, 0x100, 0x200, 0x300, 0x400, 0x500, 0x600, 0x700};
static bus_addr_t port_table_rsa[] = {
0x008, 0x009, 0x00a, 0x00b, 0x00c, 0x00d, 0x00e, 0x00f,
0x000, 0x001, 0x002, 0x003, 0x004, 0x005, 0x006, 0x007
};
struct {
char *name;
short irr_read;
short irr_write;
bus_addr_t *iat;
bus_size_t iatsz;
u_long rclk;
} if_16550a_type[] = {
/* COM_IF_RSA98 */
{" (RSA-98)", -1, -1, port_table_0, IO_COMSIZE, DEFAULT_RCLK},
/* COM_IF_NS16550 */
{"", -1, -1, port_table_0, IO_COMSIZE, DEFAULT_RCLK},
/* COM_IF_SECOND_CCU */
{"", -1, -1, port_table_0, IO_COMSIZE, DEFAULT_RCLK},
/* COM_IF_MC16550II */
{" (MC16550II)", -1, 0x1000, port_table_8, IO_COMSIZE,
DEFAULT_RCLK * 4},
/* COM_IF_MCRS98 */
{" (MC-RS98)", -1, 0x1000, port_table_8, IO_COMSIZE, DEFAULT_RCLK * 4},
/* COM_IF_RSB3000 */
{" (RSB-3000)", 0xbf, -1, port_table_1, IO_COMSIZE, DEFAULT_RCLK * 10},
/* COM_IF_RSB384 */
{" (RSB-384)", 0xbf, -1, port_table_1, IO_COMSIZE, DEFAULT_RCLK * 10},
/* COM_IF_MODEM_CARD */
{"", -1, -1, port_table_0, IO_COMSIZE, DEFAULT_RCLK},
/* COM_IF_RSA98III */
{" (RSA-98III)", -1, -1, port_table_rsa, 16, DEFAULT_RCLK * 8},
/* COM_IF_ESP98 */
{" (ESP98)", -1, -1, port_table_1, IO_COMSIZE, DEFAULT_RCLK * 4},
};
#endif /* PC98 */
#ifdef GDB
static Port_t siogdbiobase = 0;
#endif
#ifdef COM_ESP
#ifdef PC98
/* XXX configure this properly. */
/* XXX quite broken for new-bus. */
static Port_t likely_com_ports[] = { 0, 0xb0, 0xb1, 0 };
static Port_t likely_esp_ports[] = { 0xc0d0, 0 };
#define ESP98_CMD1 (ESP_CMD1 * 0x100)
#define ESP98_CMD2 (ESP_CMD2 * 0x100)
#define ESP98_STATUS1 (ESP_STATUS1 * 0x100)
#define ESP98_STATUS2 (ESP_STATUS2 * 0x100)
#else /* PC98 */
/* XXX configure this properly. */
static Port_t likely_com_ports[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, };
static Port_t likely_esp_ports[] = { 0x140, 0x180, 0x280, 0 };
#endif /* PC98 */
#endif
/*
* handle sysctl read/write requests for console speed
*
* In addition to setting comdefaultrate for I/O through /dev/console,
* also set the initial and lock values for the /dev/ttyXX device
* if there is one associated with the console. Finally, if the /dev/tty
* device has already been open, change the speed on the open running port
* itself.
*/
static int
sysctl_machdep_comdefaultrate(SYSCTL_HANDLER_ARGS)
{
int error, s;
speed_t newspeed;
struct com_s *com;
struct tty *tp;
newspeed = comdefaultrate;
error = sysctl_handle_opaque(oidp, &newspeed, sizeof newspeed, req);
if (error || !req->newptr)
return (error);
comdefaultrate = newspeed;
if (comconsole < 0) /* serial console not selected? */
return (0);
com = com_addr(comconsole);
if (com == NULL)
return (ENXIO);
tp = com->tp;
if (tp == NULL)
return (ENXIO);
/*
* set the initial and lock rates for /dev/ttydXX and /dev/cuaXX
* (note, the lock rates really are boolean -- if non-zero, disallow
* speed changes)
*/
tp->t_init_in.c_ispeed = tp->t_init_in.c_ospeed =
tp->t_lock_in.c_ispeed = tp->t_lock_in.c_ospeed =
tp->t_init_out.c_ispeed = tp->t_init_out.c_ospeed =
tp->t_lock_out.c_ispeed = tp->t_lock_out.c_ospeed = comdefaultrate;
if (tp->t_state & TS_ISOPEN) {
tp->t_termios.c_ispeed =
tp->t_termios.c_ospeed = comdefaultrate;
s = spltty();
error = comparam(tp, &tp->t_termios);
splx(s);
}
return error;
}
SYSCTL_PROC(_machdep, OID_AUTO, conspeed, CTLTYPE_INT | CTLFLAG_RW,
0, 0, sysctl_machdep_comdefaultrate, "I", "");
TUNABLE_INT("machdep.conspeed", __DEVOLATILE(int *, &comdefaultrate));
/*
* Unload the driver and clear the table.
* XXX this is mostly wrong.
* XXX TODO:
* This is usually called when the card is ejected, but
* can be caused by a kldunload of a controller driver.
* The idea is to reset the driver's view of the device
* and ensure that any driver entry points such as
* read and write do not hang.
*/
int
siodetach(device_t dev)
{
struct com_s *com;
com = (struct com_s *) device_get_softc(dev);
if (com == NULL) {
device_printf(dev, "NULL com in siounload\n");
return (0);
}
com->gone = TRUE;
if (com->tp)
ttyfree(com->tp);
if (com->irqres) {
bus_teardown_intr(dev, com->irqres, com->cookie);
bus_release_resource(dev, SYS_RES_IRQ, 0, com->irqres);
}
if (com->ioportres)
bus_release_resource(dev, SYS_RES_IOPORT, com->ioportrid,
com->ioportres);
if (com->ibuf != NULL)
free(com->ibuf, M_DEVBUF);
#ifdef PC98
if (com->obuf1 != NULL)
free(com->obuf1, M_DEVBUF);
#endif
device_set_softc(dev, NULL);
free(com, M_DEVBUF);
return (0);
}
int
sioprobe(dev, xrid, rclk, noprobe)
device_t dev;
int xrid;
u_long rclk;
int noprobe;
{
#if 0
static bool_t already_init;
device_t xdev;
#endif
struct com_s *com;
u_int divisor;
bool_t failures[10];
int fn;
device_t idev;
Port_t iobase;
intrmask_t irqmap[4];
intrmask_t irqs;
u_char mcr_image;
int result;
u_long xirq;
u_int flags = device_get_flags(dev);
int rid;
struct resource *port;
#ifdef PC98
int tmp;
struct siodev iod;
#endif
#ifdef PC98
iod.if_type = GET_IFTYPE(flags);
if ((iod.if_type < 0 || iod.if_type > COM_IF_END1) &&
(iod.if_type < 0x10 || iod.if_type > COM_IF_END2))
return ENXIO;
#endif
rid = xrid;
#ifdef PC98
if (IS_8251(iod.if_type)) {
port = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid,
RF_ACTIVE);
} else if (iod.if_type == COM_IF_MODEM_CARD ||
iod.if_type == COM_IF_RSA98III ||
isa_get_vendorid(dev)) {
port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0,
if_16550a_type[iod.if_type & 0x0f].iatsz, RF_ACTIVE);
} else {
port = isa_alloc_resourcev(dev, SYS_RES_IOPORT, &rid,
if_16550a_type[iod.if_type & 0x0f].iat,
if_16550a_type[iod.if_type & 0x0f].iatsz, RF_ACTIVE);
}
#else
port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
0, ~0, IO_COMSIZE, RF_ACTIVE);
#endif
if (!port)
return (ENXIO);
#ifdef PC98
if (!IS_8251(iod.if_type)) {
if (isa_load_resourcev(port,
if_16550a_type[iod.if_type & 0x0f].iat,
if_16550a_type[iod.if_type & 0x0f].iatsz) != 0) {
bus_release_resource(dev, SYS_RES_IOPORT, rid, port);
return ENXIO;
}
}
#endif
com = malloc(sizeof(*com), M_DEVBUF, M_NOWAIT | M_ZERO);
if (com == NULL) {
bus_release_resource(dev, SYS_RES_IOPORT, rid, port);
return (ENOMEM);
}
device_set_softc(dev, com);
com->bst = rman_get_bustag(port);
com->bsh = rman_get_bushandle(port);
#ifdef PC98
if (!IS_8251(iod.if_type) && rclk == 0)
rclk = if_16550a_type[iod.if_type & 0x0f].rclk;
#else
if (rclk == 0)
rclk = DEFAULT_RCLK;
#endif
com->rclk = rclk;
while (sio_inited != 2)
if (atomic_cmpset_int(&sio_inited, 0, 1)) {
mtx_init(&sio_lock, sio_driver_name, NULL,
(comconsole != -1) ?
MTX_SPIN | MTX_QUIET : MTX_SPIN);
atomic_store_rel_int(&sio_inited, 2);
}
#if 0
/*
* XXX this is broken - when we are first called, there are no
* previously configured IO ports. We could hard code
* 0x3f8, 0x2f8, 0x3e8, 0x2e8 etc but that's probably worse.
* This code has been doing nothing since the conversion since
* "count" is zero the first time around.
*/
if (!already_init) {
/*
* Turn off MCR_IENABLE for all likely serial ports. An unused
* port with its MCR_IENABLE gate open will inhibit interrupts
* from any used port that shares the interrupt vector.
* XXX the gate enable is elsewhere for some multiports.
*/
device_t *devs;
int count, i, xioport;
#ifdef PC98
int xiftype;
#endif
devclass_get_devices(sio_devclass, &devs, &count);
#ifdef PC98
for (i = 0; i < count; i++) {
xdev = devs[i];
xioport = bus_get_resource_start(xdev, SYS_RES_IOPORT, 0);
xiftype = GET_IFTYPE(device_get_flags(xdev));
if (device_is_enabled(xdev) && xioport > 0) {
if (IS_8251(xiftype))
outb((xioport & 0xff00) | PC98SIO_cmd_port(xiftype & 0x0f), 0xf2);
else
outb(xioport + if_16550a_type[xiftype & 0x0f].iat[com_mcr], 0);
}
}
#else
for (i = 0; i < count; i++) {
xdev = devs[i];
if (device_is_enabled(xdev) &&
bus_get_resource(xdev, SYS_RES_IOPORT, 0, &xioport,
NULL) == 0)
outb(xioport + com_mcr, 0);
}
#endif
free(devs, M_TEMP);
already_init = TRUE;
}
#endif
if (COM_LLCONSOLE(flags)) {
printf("sio%d: reserved for low-level i/o\n",
device_get_unit(dev));
bus_release_resource(dev, SYS_RES_IOPORT, rid, port);
device_set_softc(dev, NULL);
free(com, M_DEVBUF);
return (ENXIO);
}
#ifdef PC98
DELAY(10);
/*
* If the port is i8251 UART (internal, B98_01)
*/
if (pc98_check_if_type(dev, &iod) == -1) {
bus_release_resource(dev, SYS_RES_IOPORT, rid, port);
device_set_softc(dev, NULL);
free(com, M_DEVBUF);
return (ENXIO);
}
if (iod.irq > 0)
bus_set_resource(dev, SYS_RES_IRQ, 0, iod.irq, 1);
if (IS_8251(iod.if_type)) {
outb(iod.cmd, 0);
DELAY(10);
outb(iod.cmd, 0);
DELAY(10);
outb(iod.cmd, 0);
DELAY(10);
outb(iod.cmd, CMD8251_RESET);
DELAY(1000); /* for a while...*/
outb(iod.cmd, 0xf2); /* MODE (dummy) */
DELAY(10);
outb(iod.cmd, 0x01); /* CMD (dummy) */
DELAY(1000); /* for a while...*/
if (( inb(iod.sts) & STS8251_TxEMP ) == 0 ) {
result = (ENXIO);
}
if (if_8251_type[iod.if_type & 0x0f].check_irq) {
COM_INT_DISABLE
tmp = ( inb( iod.ctrl ) & ~(IEN_Rx|IEN_TxEMP|IEN_Tx));
outb( iod.ctrl, tmp|IEN_TxEMP );
DELAY(10);
result = isa_irq_pending() ? 0 : ENXIO;
outb( iod.ctrl, tmp );
COM_INT_ENABLE
} else {
/*
* B98_01 doesn't activate TxEMP interrupt line
* when being reset, so we can't check irq pending.
*/
result = 0;
}
bus_release_resource(dev, SYS_RES_IOPORT, rid, port);
if (result) {
device_set_softc(dev, NULL);
free(com, M_DEVBUF);
}
return result;
}
#endif /* PC98 */
/*
* If the device is on a multiport card and has an AST/4
* compatible interrupt control register, initialize this
* register and prepare to leave MCR_IENABLE clear in the mcr.
* Otherwise, prepare to set MCR_IENABLE in the mcr.
* Point idev to the device struct giving the correct id_irq.
* This is the struct for the master device if there is one.
*/
idev = dev;
mcr_image = MCR_IENABLE;
#ifdef COM_MULTIPORT
if (COM_ISMULTIPORT(flags)) {
#ifndef PC98
Port_t xiobase;
u_long io;
#endif
idev = devclass_get_device(sio_devclass, COM_MPMASTER(flags));
if (idev == NULL) {
printf("sio%d: master device %d not configured\n",
device_get_unit(dev), COM_MPMASTER(flags));
idev = dev;
}
#ifndef PC98
if (!COM_NOTAST4(flags)) {
if (bus_get_resource(idev, SYS_RES_IOPORT, 0, &io,
NULL) == 0) {
xiobase = io;
if (bus_get_resource(idev, SYS_RES_IRQ, 0,
NULL, NULL) == 0)
outb(xiobase + com_scr, 0x80);
else
outb(xiobase + com_scr, 0);
}
mcr_image = 0;
}
#endif
}
#endif /* COM_MULTIPORT */
if (bus_get_resource(idev, SYS_RES_IRQ, 0, NULL, NULL) != 0)
mcr_image = 0;
bzero(failures, sizeof failures);
iobase = rman_get_start(port);
#ifdef PC98
if (iod.if_type == COM_IF_RSA98III) {
mcr_image = 0;
outb(iobase + rsa_msr, 0x04);
outb(iobase + rsa_frr, 0x00);
if ((inb(iobase + rsa_srr) & 0x36) != 0x36) {
bus_release_resource(dev, SYS_RES_IOPORT, rid, port);
device_set_softc(dev, NULL);
free(com, M_DEVBUF);
return (ENXIO);
}
outb(iobase + rsa_ier, 0x00);
outb(iobase + rsa_frr, 0x00);
outb(iobase + rsa_tivsr, 0x00);
outb(iobase + rsa_tcr, 0x00);
}
tmp = if_16550a_type[iod.if_type & 0x0f].irr_write;
if (tmp != -1) {
/* MC16550II */
int irqout;
switch (isa_get_irq(idev)) {
case 3: irqout = 4; break;
case 5: irqout = 5; break;
case 6: irqout = 6; break;
case 12: irqout = 7; break;
default:
printf("sio%d: irq configuration error\n",
device_get_unit(dev));
bus_release_resource(dev, SYS_RES_IOPORT, rid, port);
device_set_softc(dev, NULL);
free(com, M_DEVBUF);
return (ENXIO);
}
outb((iobase & 0x00ff) | tmp, irqout);
}
#endif
/*
* We don't want to get actual interrupts, just masked ones.
* Interrupts from this line should already be masked in the ICU,
* but mask them in the processor as well in case there are some
* (misconfigured) shared interrupts.
*/
mtx_lock_spin(&sio_lock);
/* EXTRA DELAY? */
/*
* Initialize the speed and the word size and wait long enough to
* drain the maximum of 16 bytes of junk in device output queues.
* The speed is undefined after a master reset and must be set
* before relying on anything related to output. There may be
* junk after a (very fast) soft reboot and (apparently) after
* master reset.
* XXX what about the UART bug avoided by waiting in comparam()?
* We don't want to to wait long enough to drain at 2 bps.
*/
if (iobase == siocniobase)
DELAY((16 + 1) * 1000000 / (comdefaultrate / 10));
else {
sio_setreg(com, com_cfcr, CFCR_DLAB | CFCR_8BITS);
divisor = siodivisor(rclk, SIO_TEST_SPEED);
sio_setreg(com, com_dlbl, divisor & 0xff);
sio_setreg(com, com_dlbh, divisor >> 8);
sio_setreg(com, com_cfcr, CFCR_8BITS);
DELAY((16 + 1) * 1000000 / (SIO_TEST_SPEED / 10));
}
/*
* Enable the interrupt gate and disable device interrupts. This
* should leave the device driving the interrupt line low and
* guarantee an edge trigger if an interrupt can be generated.
*/
/* EXTRA DELAY? */
sio_setreg(com, com_mcr, mcr_image);
sio_setreg(com, com_ier, 0);
DELAY(1000); /* XXX */
irqmap[0] = isa_irq_pending();
/*
* Attempt to set loopback mode so that we can send a null byte
* without annoying any external device.
*/
/* EXTRA DELAY? */
sio_setreg(com, com_mcr, mcr_image | MCR_LOOPBACK);
/*
* Attempt to generate an output interrupt. On 8250's, setting
* IER_ETXRDY generates an interrupt independent of the current
* setting and independent of whether the THR is empty. On 16450's,
* setting IER_ETXRDY generates an interrupt independent of the
* current setting. On 16550A's, setting IER_ETXRDY only
* generates an interrupt when IER_ETXRDY is not already set.
*/
sio_setreg(com, com_ier, IER_ETXRDY);
#ifdef PC98
if (iod.if_type == COM_IF_RSA98III)
outb(iobase + rsa_ier, 0x04);
#endif
/*
* On some 16x50 incompatibles, setting IER_ETXRDY doesn't generate
* an interrupt. They'd better generate one for actually doing
* output. Loopback may be broken on the same incompatibles but
* it's unlikely to do more than allow the null byte out.
*/
sio_setreg(com, com_data, 0);
if (iobase == siocniobase)
DELAY((1 + 2) * 1000000 / (comdefaultrate / 10));
else
DELAY((1 + 2) * 1000000 / (SIO_TEST_SPEED / 10));
/*
* Turn off loopback mode so that the interrupt gate works again
* (MCR_IENABLE was hidden). This should leave the device driving
* an interrupt line high. It doesn't matter if the interrupt
* line oscillates while we are not looking at it, since interrupts
* are disabled.
*/
/* EXTRA DELAY? */
sio_setreg(com, com_mcr, mcr_image);
/*
* It seems my Xircom CBEM56G Cardbus modem wants to be reset
* to 8 bits *again*, or else probe test 0 will fail.
* gwk@sgi.com, 4/19/2001
*/
sio_setreg(com, com_cfcr, CFCR_8BITS);
/*
* Some PCMCIA cards (Palido 321s, DC-1S, ...) have the "TXRDY bug",
* so we probe for a buggy IIR_TXRDY implementation even in the
* noprobe case. We don't probe for it in the !noprobe case because
* noprobe is always set for PCMCIA cards and the problem is not
* known to affect any other cards.
*/
if (noprobe) {
/* Read IIR a few times. */
for (fn = 0; fn < 2; fn ++) {
DELAY(10000);
failures[6] = sio_getreg(com, com_iir);
}
/* IIR_TXRDY should be clear. Is it? */
result = 0;
if (failures[6] & IIR_TXRDY) {
/*
* No. We seem to have the bug. Does our fix for
* it work?
*/
sio_setreg(com, com_ier, 0);
if (sio_getreg(com, com_iir) & IIR_NOPEND) {
/* Yes. We discovered the TXRDY bug! */
SET_FLAG(dev, COM_C_IIR_TXRDYBUG);
} else {
/* No. Just fail. XXX */
result = ENXIO;
sio_setreg(com, com_mcr, 0);
}
} else {
/* Yes. No bug. */
CLR_FLAG(dev, COM_C_IIR_TXRDYBUG);
}
sio_setreg(com, com_ier, 0);
sio_setreg(com, com_cfcr, CFCR_8BITS);
mtx_unlock_spin(&sio_lock);
bus_release_resource(dev, SYS_RES_IOPORT, rid, port);
if (iobase == siocniobase)
result = 0;
if (result != 0) {
device_set_softc(dev, NULL);
free(com, M_DEVBUF);
}
return (result);
}
/*
* Check that
* o the CFCR, IER and MCR in UART hold the values written to them
* (the values happen to be all distinct - this is good for
* avoiding false positive tests from bus echoes).
* o an output interrupt is generated and its vector is correct.
* o the interrupt goes away when the IIR in the UART is read.
*/
/* EXTRA DELAY? */
failures[0] = sio_getreg(com, com_cfcr) - CFCR_8BITS;
failures[1] = sio_getreg(com, com_ier) - IER_ETXRDY;
failures[2] = sio_getreg(com, com_mcr) - mcr_image;
DELAY(10000); /* Some internal modems need this time */
irqmap[1] = isa_irq_pending();
failures[4] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_TXRDY;
#ifdef PC98
if (iod.if_type == COM_IF_RSA98III)
inb(iobase + rsa_srr);
#endif
DELAY(1000); /* XXX */
irqmap[2] = isa_irq_pending();
failures[6] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND;
#ifdef PC98
if (iod.if_type == COM_IF_RSA98III)
inb(iobase + rsa_srr);
#endif
/*
* Turn off all device interrupts and check that they go off properly.
* Leave MCR_IENABLE alone. For ports without a master port, it gates
* the OUT2 output of the UART to
* the ICU input. Closing the gate would give a floating ICU input
* (unless there is another device driving it) and spurious interrupts.
* (On the system that this was first tested on, the input floats high
* and gives a (masked) interrupt as soon as the gate is closed.)
*/
sio_setreg(com, com_ier, 0);
sio_setreg(com, com_cfcr, CFCR_8BITS); /* dummy to avoid bus echo */
failures[7] = sio_getreg(com, com_ier);
#ifdef PC98
if (iod.if_type == COM_IF_RSA98III)
outb(iobase + rsa_ier, 0x00);
#endif
DELAY(1000); /* XXX */
irqmap[3] = isa_irq_pending();
failures[9] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND;
#ifdef PC98
if (iod.if_type == COM_IF_RSA98III) {
inb(iobase + rsa_srr);
outb(iobase + rsa_frr, 0x00);
}
#endif
mtx_unlock_spin(&sio_lock);
irqs = irqmap[1] & ~irqmap[0];
if (bus_get_resource(idev, SYS_RES_IRQ, 0, &xirq, NULL) == 0 &&
((1 << xirq) & irqs) == 0) {
printf(
"sio%d: configured irq %ld not in bitmap of probed irqs %#x\n",
device_get_unit(dev), xirq, irqs);
printf(
"sio%d: port may not be enabled\n",
device_get_unit(dev));
}
if (bootverbose)
printf("sio%d: irq maps: %#x %#x %#x %#x\n",
device_get_unit(dev),
irqmap[0], irqmap[1], irqmap[2], irqmap[3]);
result = 0;
for (fn = 0; fn < sizeof failures; ++fn)
if (failures[fn]) {
sio_setreg(com, com_mcr, 0);
result = ENXIO;
if (bootverbose) {
printf("sio%d: probe failed test(s):",
device_get_unit(dev));
for (fn = 0; fn < sizeof failures; ++fn)
if (failures[fn])
printf(" %d", fn);
printf("\n");
}
break;
}
bus_release_resource(dev, SYS_RES_IOPORT, rid, port);
if (iobase == siocniobase)
result = 0;
if (result != 0) {
device_set_softc(dev, NULL);
free(com, M_DEVBUF);
}
return (result);
}
#ifdef COM_ESP
static int
espattach(com, esp_port)
struct com_s *com;
Port_t esp_port;
{
u_char dips;
u_char val;
/*
* Check the ESP-specific I/O port to see if we're an ESP
* card. If not, return failure immediately.
*/
if ((inb(esp_port) & 0xf3) == 0) {
printf(" port 0x%x is not an ESP board?\n", esp_port);
return (0);
}
/*
* We've got something that claims to be a Hayes ESP card.
* Let's hope so.
*/
/* Get the dip-switch configuration */
#ifdef PC98
outb(esp_port + ESP98_CMD1, ESP_GETDIPS);
dips = inb(esp_port + ESP98_STATUS1);
#else
outb(esp_port + ESP_CMD1, ESP_GETDIPS);
dips = inb(esp_port + ESP_STATUS1);
#endif
/*
* Bits 0,1 of dips say which COM port we are.
*/
#ifdef PC98
if ((rman_get_start(com->ioportres) & 0xff) ==
likely_com_ports[dips & 0x03])
#else
if (rman_get_start(com->ioportres) == likely_com_ports[dips & 0x03])
#endif
printf(" : ESP");
else {
printf(" esp_port has com %d\n", dips & 0x03);
return (0);
}
/*
* Check for ESP version 2.0 or later: bits 4,5,6 = 010.
*/
#ifdef PC98
outb(esp_port + ESP98_CMD1, ESP_GETTEST);
val = inb(esp_port + ESP98_STATUS1); /* clear reg 1 */
val = inb(esp_port + ESP98_STATUS2);
#else
outb(esp_port + ESP_CMD1, ESP_GETTEST);
val = inb(esp_port + ESP_STATUS1); /* clear reg 1 */
val = inb(esp_port + ESP_STATUS2);
#endif
if ((val & 0x70) < 0x20) {
printf("-old (%o)", val & 0x70);
return (0);
}
/*
* Check for ability to emulate 16550: bit 7 == 1
*/
if ((dips & 0x80) == 0) {
printf(" slave");
return (0);
}
/*
* Okay, we seem to be a Hayes ESP card. Whee.
*/
com->esp = TRUE;
com->esp_port = esp_port;
return (1);
}
#endif /* COM_ESP */
int
sioattach(dev, xrid, rclk)
device_t dev;
int xrid;
u_long rclk;
{
struct com_s *com;
#ifdef COM_ESP
Port_t *espp;
#endif
Port_t iobase;
int unit;
u_int flags;
int rid;
struct resource *port;
int ret;
int error;
struct tty *tp;
#ifdef PC98
u_char *obuf;
u_long obufsize;
int if_type = GET_IFTYPE(device_get_flags(dev));
#endif
rid = xrid;
#ifdef PC98
if (IS_8251(if_type)) {
port = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid,
RF_ACTIVE);
} else if (if_type == COM_IF_MODEM_CARD ||
if_type == COM_IF_RSA98III ||
isa_get_vendorid(dev)) {
port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0,
if_16550a_type[if_type & 0x0f].iatsz, RF_ACTIVE);
} else {
port = isa_alloc_resourcev(dev, SYS_RES_IOPORT, &rid,
if_16550a_type[if_type & 0x0f].iat,
if_16550a_type[if_type & 0x0f].iatsz, RF_ACTIVE);
}
#else
port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
0, ~0, IO_COMSIZE, RF_ACTIVE);
#endif
if (!port)
return (ENXIO);
#ifdef PC98
if (!IS_8251(if_type)) {
if (isa_load_resourcev(port,
if_16550a_type[if_type & 0x0f].iat,
if_16550a_type[if_type & 0x0f].iatsz) != 0) {
bus_release_resource(dev, SYS_RES_IOPORT, rid, port);
return ENXIO;
}
}
#endif
iobase = rman_get_start(port);
unit = device_get_unit(dev);
com = device_get_softc(dev);
flags = device_get_flags(dev);
if (unit >= sio_numunits)
sio_numunits = unit + 1;
#ifdef PC98
obufsize = 256;
if (if_type == COM_IF_RSA98III)
obufsize = 2048;
if ((obuf = malloc(obufsize * 2, M_DEVBUF, M_NOWAIT)) == NULL) {
bus_release_resource(dev, SYS_RES_IOPORT, rid, port);
return ENXIO;
}
bzero(obuf, obufsize * 2);
#endif
/*
* sioprobe() has initialized the device registers as follows:
* o cfcr = CFCR_8BITS.
* It is most important that CFCR_DLAB is off, so that the
* data port is not hidden when we enable interrupts.
* o ier = 0.
* Interrupts are only enabled when the line is open.
* o mcr = MCR_IENABLE, or 0 if the port has AST/4 compatible
* interrupt control register or the config specifies no irq.
* Keeping MCR_DTR and MCR_RTS off might stop the external
* device from sending before we are ready.
*/
bzero(com, sizeof *com);
com->unit = unit;
com->ioportres = port;
com->ioportrid = rid;
com->bst = rman_get_bustag(port);
com->bsh = rman_get_bushandle(port);
com->cfcr_image = CFCR_8BITS;
com->loses_outints = COM_LOSESOUTINTS(flags) != 0;
com->no_irq = bus_get_resource(dev, SYS_RES_IRQ, 0, NULL, NULL) != 0;
com->tx_fifo_size = 1;
#ifdef PC98
com->obufsize = obufsize;
com->obuf1 = obuf;
com->obuf2 = obuf + obufsize;
#endif
com->obufs[0].l_head = com->obuf1;
com->obufs[1].l_head = com->obuf2;
#ifdef PC98
com->pc98_if_type = if_type;
if (IS_8251(if_type)) {
pc98_set_ioport(com);
if (if_type == COM_IF_INTERNAL && pc98_check_8251fifo()) {
com->pc98_8251fifo = 1;
com->pc98_8251fifo_enable = 0;
}
} else {
bus_addr_t *iat = if_16550a_type[if_type & 0x0f].iat;
com->data_port = iobase + iat[com_data];
com->int_ctl_port = iobase + iat[com_ier];
com->int_id_port = iobase + iat[com_iir];
com->modem_ctl_port = iobase + iat[com_mcr];
com->mcr_image = inb(com->modem_ctl_port);
com->line_status_port = iobase + iat[com_lsr];
com->modem_status_port = iobase + iat[com_msr];
}
#else /* not PC98 */
com->data_port = iobase + com_data;
com->int_ctl_port = iobase + com_ier;
com->int_id_port = iobase + com_iir;
com->modem_ctl_port = iobase + com_mcr;
com->mcr_image = inb(com->modem_ctl_port);
com->line_status_port = iobase + com_lsr;
com->modem_status_port = iobase + com_msr;
#endif
tp = com->tp = ttyalloc();
tp->t_oproc = comstart;
tp->t_param = comparam;
tp->t_stop = comstop;
tp->t_modem = commodem;
tp->t_break = combreak;
tp->t_close = comclose;
tp->t_open = comopen;
tp->t_sc = com;
#ifdef PC98
if (!IS_8251(if_type) && rclk == 0)
rclk = if_16550a_type[if_type & 0x0f].rclk;
#else
if (rclk == 0)
rclk = DEFAULT_RCLK;
#endif
com->rclk = rclk;
if (unit == comconsole)
ttyconsolemode(tp, comdefaultrate);
error = siosetwater(com, tp->t_init_in.c_ispeed);
mtx_unlock_spin(&sio_lock);
if (error) {
/*
* Leave i/o resources allocated if this is a `cn'-level
* console, so that other devices can't snarf them.
*/
if (iobase != siocniobase)
bus_release_resource(dev, SYS_RES_IOPORT, rid, port);
return (ENOMEM);
}
/* attempt to determine UART type */
printf("sio%d: type", unit);
#ifndef PC98
if (!COM_ISMULTIPORT(flags) &&
!COM_IIR_TXRDYBUG(flags) && !COM_NOSCR(flags)) {
u_char scr;
u_char scr1;
u_char scr2;
scr = sio_getreg(com, com_scr);
sio_setreg(com, com_scr, 0xa5);
scr1 = sio_getreg(com, com_scr);
sio_setreg(com, com_scr, 0x5a);
scr2 = sio_getreg(com, com_scr);
sio_setreg(com, com_scr, scr);
if (scr1 != 0xa5 || scr2 != 0x5a) {
printf(" 8250 or not responding");
goto determined_type;
}
}
#endif /* !PC98 */
#ifdef PC98
if (IS_8251(com->pc98_if_type)) {
if (com->pc98_8251fifo && !COM_NOFIFO(flags))
com->tx_fifo_size = 16;
com_int_TxRx_disable( com );
com_cflag_and_speed_set( com, tp->t_init_in.c_cflag, comdefaultrate );
com_tiocm_bic( com, TIOCM_DTR|TIOCM_RTS|TIOCM_LE );
com_send_break_off( com );
if (com->pc98_if_type == COM_IF_INTERNAL) {
printf(" (internal%s%s)",
com->pc98_8251fifo ? " fifo" : "",
PC98SIO_baud_rate_port(com->pc98_if_type) != -1 ?
" v-fast" : "");
} else {
printf(" 8251%s", if_8251_type[com->pc98_if_type & 0x0f].name);
}
} else {
#endif /* PC98 */
sio_setreg(com, com_fifo, FIFO_ENABLE | FIFO_RX_HIGH);
DELAY(100);
switch (inb(com->int_id_port) & IIR_FIFO_MASK) {
case FIFO_RX_LOW:
printf(" 16450");
break;
case FIFO_RX_MEDL:
printf(" 16450?");
break;
case FIFO_RX_MEDH:
printf(" 16550?");
break;
case FIFO_RX_HIGH:
if (COM_NOFIFO(flags)) {
printf(" 16550A fifo disabled");
break;
}
com->hasfifo = TRUE;
#ifdef PC98
if (com->pc98_if_type == COM_IF_RSA98III) {
com->tx_fifo_size = 2048;
com->rsabase = iobase;
outb(com->rsabase + rsa_ier, 0x00);
outb(com->rsabase + rsa_frr, 0x00);
}
#else
if (COM_ST16650A(flags)) {
printf(" ST16650A");
com->st16650a = TRUE;
com->tx_fifo_size = 32;
break;
}
if (COM_TI16754(flags)) {
printf(" TI16754");
com->tx_fifo_size = 64;
break;
}
#endif
printf(" 16550A");
#ifdef COM_ESP
#ifdef PC98
if (com->pc98_if_type == COM_IF_ESP98)
#endif
for (espp = likely_esp_ports; *espp != 0; espp++)
if (espattach(com, *espp)) {
com->tx_fifo_size = 1024;
break;
}
if (com->esp)
break;
#endif
#ifdef PC98
com->tx_fifo_size = 16;
#else
com->tx_fifo_size = COM_FIFOSIZE(flags);
if (com->tx_fifo_size == 0)
com->tx_fifo_size = 16;
else
printf(" lookalike with %u bytes FIFO",
com->tx_fifo_size);
#endif
break;
}
#ifdef PC98
if (com->pc98_if_type == COM_IF_RSB3000) {
/* Set RSB-2000/3000 Extended Buffer mode. */
u_char lcr;
lcr = sio_getreg(com, com_cfcr);
sio_setreg(com, com_cfcr, lcr | CFCR_DLAB);
sio_setreg(com, com_emr, EMR_EXBUFF | EMR_EFMODE);
sio_setreg(com, com_cfcr, lcr);
}
#endif
#ifdef COM_ESP
if (com->esp) {
/*
* Set 16550 compatibility mode.
* We don't use the ESP_MODE_SCALE bit to increase the
* fifo trigger levels because we can't handle large
* bursts of input.
* XXX flow control should be set in comparam(), not here.
*/
#ifdef PC98
outb(com->esp_port + ESP98_CMD1, ESP_SETMODE);
outb(com->esp_port + ESP98_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO);
#else
outb(com->esp_port + ESP_CMD1, ESP_SETMODE);
outb(com->esp_port + ESP_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO);
#endif
/* Set RTS/CTS flow control. */
#ifdef PC98
outb(com->esp_port + ESP98_CMD1, ESP_SETFLOWTYPE);
outb(com->esp_port + ESP98_CMD2, ESP_FLOW_RTS);
outb(com->esp_port + ESP98_CMD2, ESP_FLOW_CTS);
#else
outb(com->esp_port + ESP_CMD1, ESP_SETFLOWTYPE);
outb(com->esp_port + ESP_CMD2, ESP_FLOW_RTS);
outb(com->esp_port + ESP_CMD2, ESP_FLOW_CTS);
#endif
/* Set flow-control levels. */
#ifdef PC98
outb(com->esp_port + ESP98_CMD1, ESP_SETRXFLOW);
outb(com->esp_port + ESP98_CMD2, HIBYTE(768));
outb(com->esp_port + ESP98_CMD2, LOBYTE(768));
outb(com->esp_port + ESP98_CMD2, HIBYTE(512));
outb(com->esp_port + ESP98_CMD2, LOBYTE(512));
#else
outb(com->esp_port + ESP_CMD1, ESP_SETRXFLOW);
outb(com->esp_port + ESP_CMD2, HIBYTE(768));
outb(com->esp_port + ESP_CMD2, LOBYTE(768));
outb(com->esp_port + ESP_CMD2, HIBYTE(512));
outb(com->esp_port + ESP_CMD2, LOBYTE(512));
#endif
#ifdef PC98
/* Set UART clock prescaler. */
outb(com->esp_port + ESP98_CMD1, ESP_SETCLOCK);
outb(com->esp_port + ESP98_CMD2, 2); /* 4 times */
#endif
}
#endif /* COM_ESP */
sio_setreg(com, com_fifo, 0);
#ifdef PC98
printf("%s", if_16550a_type[com->pc98_if_type & 0x0f].name);
#else
determined_type: ;
#endif
#ifdef COM_MULTIPORT
if (COM_ISMULTIPORT(flags)) {
device_t masterdev;
com->multiport = TRUE;
printf(" (multiport");
if (unit == COM_MPMASTER(flags))
printf(" master");
printf(")");
masterdev = devclass_get_device(sio_devclass,
COM_MPMASTER(flags));
com->no_irq = (masterdev == NULL || bus_get_resource(masterdev,
SYS_RES_IRQ, 0, NULL, NULL) != 0);
}
#endif /* COM_MULTIPORT */
#ifdef PC98
}
#endif
if (unit == comconsole)
printf(", console");
if (COM_IIR_TXRDYBUG(flags))
printf(" with a buggy IIR_TXRDY implementation");
printf("\n");
if (sio_fast_ih == NULL) {
swi_add(&tty_intr_event, "sio", siopoll, NULL, SWI_TTY, 0,
&sio_fast_ih);
swi_add(&clk_intr_event, "sio", siopoll, NULL, SWI_CLOCK, 0,
&sio_slow_ih);
}
com->flags = flags;
com->pps.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR;
tp->t_pps = &com->pps;
if (COM_PPSCTS(flags))
com->pps_bit = MSR_CTS;
else
com->pps_bit = MSR_DCD;
pps_init(&com->pps);
rid = 0;
com->irqres = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
if (com->irqres) {
ret = bus_setup_intr(dev, com->irqres,
INTR_TYPE_TTY,
siointr, NULL, com, &com->cookie);
if (ret) {
ret = bus_setup_intr(dev,
com->irqres, INTR_TYPE_TTY,
NULL, (driver_intr_t *)siointr,
com, &com->cookie);
if (ret == 0)
device_printf(dev, "unable to activate interrupt in fast mode - using normal mode\n");
}
if (ret)
device_printf(dev, "could not activate interrupt\n");
#if defined(KDB) && (defined(BREAK_TO_DEBUGGER) || \
defined(ALT_BREAK_TO_DEBUGGER))
/*
* Enable interrupts for early break-to-debugger support
* on the console.
*/
if (ret == 0 && unit == comconsole)
outb(siocniobase + com_ier, IER_ERXRDY | IER_ERLS |
IER_EMSC);
#endif
}
/* We're ready, open the doors... */
ttycreate(tp, TS_CALLOUT, "d%r", unit);
return (0);
}
static int
comopen(struct tty *tp, struct cdev *dev)
{
struct com_s *com;
int i;
com = tp->t_sc;
com->poll = com->no_irq;
com->poll_output = com->loses_outints;
#ifdef PC98
if (IS_8251(com->pc98_if_type)) {
com_tiocm_bis(com, TIOCM_DTR|TIOCM_RTS);
pc98_msrint_start(dev);
if (com->pc98_8251fifo) {
com->pc98_8251fifo_enable = 1;
outb(I8251F_fcr,
FIFO_ENABLE | FIFO_XMT_RST | FIFO_RCV_RST);
}
}
#endif
if (com->hasfifo) {
/*
* (Re)enable and drain fifos.
*
* Certain SMC chips cause problems if the fifos
* are enabled while input is ready. Turn off the
* fifo if necessary to clear the input. We test
* the input ready bit after enabling the fifos
* since we've already enabled them in comparam()
* and to handle races between enabling and fresh
* input.
*/
for (i = 0; i < 500; i++) {
sio_setreg(com, com_fifo,
FIFO_RCV_RST | FIFO_XMT_RST | com->fifo_image);
#ifdef PC98
if (com->pc98_if_type == COM_IF_RSA98III)
outb(com->rsabase + rsa_frr , 0x00);
#endif
/*
* XXX the delays are for superstitious
* historical reasons. It must be less than
* the character time at the maximum
* supported speed (87 usec at 115200 bps
* 8N1). Otherwise we might loop endlessly
* if data is streaming in. We used to use
* delays of 100. That usually worked
* because DELAY(100) used to usually delay
* for about 85 usec instead of 100.
*/
DELAY(50);
#ifdef PC98
if (com->pc98_if_type == COM_IF_RSA98III ?
!(inb(com->rsabase + rsa_srr) & 0x08) :
!(inb(com->line_status_port) & LSR_RXRDY))
break;
#else
if (!(inb(com->line_status_port) & LSR_RXRDY))
break;
#endif
sio_setreg(com, com_fifo, 0);
DELAY(50);
(void) inb(com->data_port);
}
if (i == 500)
return (EIO);
}
mtx_lock_spin(&sio_lock);
#ifdef PC98
if (IS_8251(com->pc98_if_type)) {
com_tiocm_bis(com, TIOCM_LE);
com->pc98_prev_modem_status = pc98_get_modem_status(com);
com_int_Rx_enable(com);
} else {
#endif
(void) inb(com->line_status_port);
(void) inb(com->data_port);
com->prev_modem_status = com->last_modem_status
= inb(com->modem_status_port);
outb(com->int_ctl_port,
IER_ERXRDY | IER_ERLS | IER_EMSC
| (COM_IIR_TXRDYBUG(com->flags) ? 0 : IER_ETXRDY));
#ifdef PC98
if (com->pc98_if_type == COM_IF_RSA98III) {
outb(com->rsabase + rsa_ier, 0x1d);
outb(com->int_ctl_port, IER_ERLS | IER_EMSC);
}
#endif
#ifdef PC98
}
#endif
mtx_unlock_spin(&sio_lock);
siosettimeout();
/* XXX: should be generic ? */
#ifdef PC98
if ((IS_8251(com->pc98_if_type) &&
(pc98_get_modem_status(com) & TIOCM_CAR)) ||
(!IS_8251(com->pc98_if_type) &&
(com->prev_modem_status & MSR_DCD)) ||
ISCALLOUT(dev))
ttyld_modem(tp, 1);
#else
if (com->prev_modem_status & MSR_DCD || ISCALLOUT(dev))
ttyld_modem(tp, 1);
#endif
return (0);
}
static void
comclose(tp)
struct tty *tp;
{
int s;
struct com_s *com;
s = spltty();
com = tp->t_sc;
com->poll = FALSE;
com->poll_output = FALSE;
#ifdef PC98
com_send_break_off(com);
#else
sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK);
#endif
#if defined(KDB) && (defined(BREAK_TO_DEBUGGER) || \
defined(ALT_BREAK_TO_DEBUGGER))
/*
* Leave interrupts enabled and don't clear DTR if this is the
* console. This allows us to detect break-to-debugger events
* while the console device is closed.
*/
if (com->unit != comconsole)
#endif
{
#ifdef PC98
int tmp;
if (IS_8251(com->pc98_if_type))
com_int_TxRx_disable(com);
else
sio_setreg(com, com_ier, 0);
if (com->pc98_if_type == COM_IF_RSA98III)
outb(com->rsabase + rsa_ier, 0x00);
if (IS_8251(com->pc98_if_type))
tmp = pc98_get_modem_status(com) & TIOCM_CAR;
else
tmp = com->prev_modem_status & MSR_DCD;
#else
sio_setreg(com, com_ier, 0);
#endif
if (tp->t_cflag & HUPCL
/*
* XXX we will miss any carrier drop between here and the
* next open. Perhaps we should watch DCD even when the
* port is closed; it is not sufficient to check it at
* the next open because it might go up and down while
* we're not watching.
*/
|| (!tp->t_actout
#ifdef PC98
&& !(tmp)
#else
&& !(com->prev_modem_status & MSR_DCD)
#endif
&& !(tp->t_init_in.c_cflag & CLOCAL))
|| !(tp->t_state & TS_ISOPEN)) {
#ifdef PC98
if (IS_8251(com->pc98_if_type))
com_tiocm_bic(com, TIOCM_DTR|TIOCM_RTS|TIOCM_LE);
else
#endif
(void)commodem(tp, 0, SER_DTR);
ttydtrwaitstart(tp);
}
#ifdef PC98
else {
if (IS_8251(com->pc98_if_type))
com_tiocm_bic(com, TIOCM_LE);
}
#endif
}
#ifdef PC98
if (com->pc98_8251fifo) {
if (com->pc98_8251fifo_enable)
outb(I8251F_fcr, FIFO_XMT_RST | FIFO_RCV_RST);
com->pc98_8251fifo_enable = 0;
}
#endif
if (com->hasfifo) {
/*
* Disable fifos so that they are off after controlled
* reboots. Some BIOSes fail to detect 16550s when the
* fifos are enabled.
*/
sio_setreg(com, com_fifo, 0);
}
tp->t_actout = FALSE;
wakeup(&tp->t_actout);
wakeup(TSA_CARR_ON(tp)); /* restart any wopeners */
siosettimeout();
splx(s);
}
static void
siobusycheck(chan)
void *chan;
{
struct com_s *com;
int s;
com = (struct com_s *)chan;
/*
* Clear TS_BUSY if low-level output is complete.
* spl locking is sufficient because siointr1() does not set CS_BUSY.
* If siointr1() clears CS_BUSY after we look at it, then we'll get
* called again. Reading the line status port outside of siointr1()
* is safe because CS_BUSY is clear so there are no output interrupts
* to lose.
*/
s = spltty();
if (com->state & CS_BUSY)
com->extra_state &= ~CSE_BUSYCHECK; /* False alarm. */
#ifdef PC98
else if ((IS_8251(com->pc98_if_type) &&
((com->pc98_8251fifo_enable &&
(inb(I8251F_lsr) & (FLSR_TxRDY | FLSR_TxEMP))
== (FLSR_TxRDY | FLSR_TxEMP)) ||
(!com->pc98_8251fifo_enable &&
(inb(com->sts_port) & (STS8251_TxRDY | STS8251_TxEMP))
== (STS8251_TxRDY | STS8251_TxEMP)))) ||
((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY))
== (LSR_TSRE | LSR_TXRDY))) {
#else
else if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY))
== (LSR_TSRE | LSR_TXRDY)) {
#endif
com->tp->t_state &= ~TS_BUSY;
ttwwakeup(com->tp);
com->extra_state &= ~CSE_BUSYCHECK;
} else
timeout(siobusycheck, com, hz / 100);
splx(s);
}
static u_int
siodivisor(rclk, speed)
u_long rclk;
speed_t speed;
{
long actual_speed;
u_int divisor;
int error;
if (speed == 0)
return (0);
#if UINT_MAX > (ULONG_MAX - 1) / 8
if (speed > (ULONG_MAX - 1) / 8)
return (0);
#endif
divisor = (rclk / (8UL * speed) + 1) / 2;
if (divisor == 0 || divisor >= 65536)
return (0);
actual_speed = rclk / (16UL * divisor);
/* 10 times error in percent: */
error = ((actual_speed - (long)speed) * 2000 / (long)speed + 1) / 2;
/* 3.0% maximum error tolerance: */
if (error < -30 || error > 30)
return (0);
return (divisor);
}
/*
* Call this function with the sio_lock mutex held. It will return with the
* lock still held.
*/
static void
sioinput(com)
struct com_s *com;
{
u_char *buf;
int incc;
u_char line_status;
int recv_data;
struct tty *tp;
buf = com->ibuf;
tp = com->tp;
if (!(tp->t_state & TS_ISOPEN) || !(tp->t_cflag & CREAD)) {
com_events -= (com->iptr - com->ibuf);
com->iptr = com->ibuf;
return;
}
if (tp->t_state & TS_CAN_BYPASS_L_RINT) {
/*
* Avoid the grotesquely inefficient lineswitch routine
* (ttyinput) in "raw" mode. It usually takes about 450
* instructions (that's without canonical processing or echo!).
* slinput is reasonably fast (usually 40 instructions plus
* call overhead).
*/
do {
/*
* This may look odd, but it is using save-and-enable
* semantics instead of the save-and-disable semantics
* that are used everywhere else.
*/
mtx_unlock_spin(&sio_lock);
incc = com->iptr - buf;
if (tp->t_rawq.c_cc + incc > tp->t_ihiwat
&& (com->state & CS_RTS_IFLOW
|| tp->t_iflag & IXOFF)
&& !(tp->t_state & TS_TBLOCK))
ttyblock(tp);
com->delta_error_counts[CE_TTY_BUF_OVERFLOW]
+= b_to_q((char *)buf, incc, &tp->t_rawq);
buf += incc;
tk_nin += incc;
tk_rawcc += incc;
tp->t_rawcc += incc;
ttwakeup(tp);
if (tp->t_state & TS_TTSTOP
&& (tp->t_iflag & IXANY
|| tp->t_cc[VSTART] == tp->t_cc[VSTOP])) {
tp->t_state &= ~TS_TTSTOP;
tp->t_lflag &= ~FLUSHO;
comstart(tp);
}
mtx_lock_spin(&sio_lock);
} while (buf < com->iptr);
} else {
do {
/*
* This may look odd, but it is using save-and-enable
* semantics instead of the save-and-disable semantics
* that are used everywhere else.
*/
mtx_unlock_spin(&sio_lock);
line_status = buf[com->ierroff];
recv_data = *buf++;
if (line_status
& (LSR_BI | LSR_FE | LSR_OE | LSR_PE)) {
if (line_status & LSR_BI)
recv_data |= TTY_BI;
if (line_status & LSR_FE)
recv_data |= TTY_FE;
if (line_status & LSR_OE)
recv_data |= TTY_OE;
if (line_status & LSR_PE)
recv_data |= TTY_PE;
}
ttyld_rint(tp, recv_data);
mtx_lock_spin(&sio_lock);
} while (buf < com->iptr);
}
com_events -= (com->iptr - com->ibuf);
com->iptr = com->ibuf;
/*
* There is now room for another low-level buffer full of input,
* so enable RTS if it is now disabled and there is room in the
* high-level buffer.
*/
#ifdef PC98
if (IS_8251(com->pc98_if_type)) {
if ((com->state & CS_RTS_IFLOW) &&
!(com_tiocm_get(com) & TIOCM_RTS) &&
!(tp->t_state & TS_TBLOCK))
com_tiocm_bis(com, TIOCM_RTS);
} else {
if ((com->state & CS_RTS_IFLOW) &&
!(com->mcr_image & MCR_RTS) &&
!(tp->t_state & TS_TBLOCK))
outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS);
}
#else
if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & MCR_RTS) &&
!(tp->t_state & TS_TBLOCK))
outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS);
#endif
}
static int
siointr(arg)
void *arg;
{
struct com_s *com;
#if defined(PC98) && defined(COM_MULTIPORT)
u_char rsa_buf_status;
#endif
#ifndef COM_MULTIPORT
com = (struct com_s *)arg;
mtx_lock_spin(&sio_lock);
siointr1(com);
mtx_unlock_spin(&sio_lock);
#else /* COM_MULTIPORT */
bool_t possibly_more_intrs;
int unit;
/*
* Loop until there is no activity on any port. This is necessary
* to get an interrupt edge more than to avoid another interrupt.
* If the IRQ signal is just an OR of the IRQ signals from several
* devices, then the edge from one may be lost because another is
* on.
*/
mtx_lock_spin(&sio_lock);
do {
possibly_more_intrs = FALSE;
for (unit = 0; unit < sio_numunits; ++unit) {
com = com_addr(unit);
/*
* XXX COM_LOCK();
* would it work here, or be counter-productive?
*/
#ifdef PC98
if (com != NULL
&& !com->gone
&& IS_8251(com->pc98_if_type)) {
siointr1(com);
} else if (com != NULL
&& !com->gone
&& com->pc98_if_type == COM_IF_RSA98III) {
rsa_buf_status =
inb(com->rsabase + rsa_srr) & 0xc9;
if ((rsa_buf_status & 0xc8)
|| !(rsa_buf_status & 0x01)) {
siointr1(com);
if (rsa_buf_status !=
(inb(com->rsabase + rsa_srr) & 0xc9))
possibly_more_intrs = TRUE;
}
} else
#endif
if (com != NULL
&& !com->gone
&& (inb(com->int_id_port) & IIR_IMASK)
!= IIR_NOPEND) {
siointr1(com);
possibly_more_intrs = TRUE;
}
/* XXX COM_UNLOCK(); */
}
} while (possibly_more_intrs);
mtx_unlock_spin(&sio_lock);
#endif /* COM_MULTIPORT */
return (FILTER_HANDLED);
}
static struct timespec siots[8];
static int siotso;
static int volatile siotsunit = -1;
static int
sysctl_siots(SYSCTL_HANDLER_ARGS)
{
char buf[128];
long long delta;
size_t len;
int error, i, tso;
for (i = 1, tso = siotso; i < tso; i++) {
delta = (long long)(siots[i].tv_sec - siots[i - 1].tv_sec) *
1000000000 +
(siots[i].tv_nsec - siots[i - 1].tv_nsec);
len = sprintf(buf, "%lld\n", delta);
if (delta >= 110000)
len += sprintf(buf + len - 1, ": *** %ld.%09ld\n",
(long)siots[i].tv_sec, siots[i].tv_nsec) - 1;
if (i == tso - 1)
buf[len - 1] = '\0';
error = SYSCTL_OUT(req, buf, len);
if (error != 0)
return (error);
}
return (0);
}
SYSCTL_PROC(_machdep, OID_AUTO, siots, CTLTYPE_STRING | CTLFLAG_RD,
0, 0, sysctl_siots, "A", "sio timestamps");
static void
siointr1(com)
struct com_s *com;
{
u_char int_ctl;
u_char int_ctl_new;
u_char line_status;
u_char modem_status;
u_char *ioptr;
u_char recv_data;
#ifdef PC98
u_char tmp = 0;
u_char rsa_buf_status = 0;
int rsa_tx_fifo_size = 0;
#endif /* PC98 */
#if defined(KDB) && defined(ALT_BREAK_TO_DEBUGGER)
int kdb_brk;
again:
#endif
if (COM_IIR_TXRDYBUG(com->flags)) {
int_ctl = inb(com->int_ctl_port);
int_ctl_new = int_ctl;
} else {
int_ctl = 0;
int_ctl_new = 0;
}
while (!com->gone) {
#ifdef PC98
status_read:;
if (IS_8251(com->pc98_if_type)) {
if (com->pc98_8251fifo_enable)
tmp = inb(I8251F_lsr);
else
tmp = inb(com->sts_port);
more_intr:
line_status = 0;
if (com->pc98_8251fifo_enable) {
if (tmp & FLSR_TxRDY) line_status |= LSR_TXRDY;
if (tmp & FLSR_RxRDY) line_status |= LSR_RXRDY;
if (tmp & FLSR_TxEMP) line_status |= LSR_TSRE;
if (tmp & FLSR_PE) line_status |= LSR_PE;
if (tmp & FLSR_OE) line_status |= LSR_OE;
if (tmp & FLSR_BI) line_status |= LSR_BI;
} else {
if (tmp & STS8251_TxRDY) line_status |= LSR_TXRDY;
if (tmp & STS8251_RxRDY) line_status |= LSR_RXRDY;
if (tmp & STS8251_TxEMP) line_status |= LSR_TSRE;
if (tmp & STS8251_PE) line_status |= LSR_PE;
if (tmp & STS8251_OE) line_status |= LSR_OE;
if (tmp & STS8251_FE) line_status |= LSR_FE;
if (tmp & STS8251_BI) line_status |= LSR_BI;
}
} else {
#endif /* PC98 */
if (com->pps.ppsparam.mode & PPS_CAPTUREBOTH) {
modem_status = inb(com->modem_status_port);
if ((modem_status ^ com->last_modem_status) &
com->pps_bit) {
pps_capture(&com->pps);
pps_event(&com->pps,
(modem_status & com->pps_bit) ?
PPS_CAPTUREASSERT : PPS_CAPTURECLEAR);
}
}
line_status = inb(com->line_status_port);
#ifdef PC98
}
if (com->pc98_if_type == COM_IF_RSA98III)
rsa_buf_status = inb(com->rsabase + rsa_srr);
#endif /* PC98 */
/* input event? (check first to help avoid overruns) */
#ifndef PC98
while (line_status & LSR_RCV_MASK) {
#else
while ((line_status & LSR_RCV_MASK)
|| (com->pc98_if_type == COM_IF_RSA98III
&& (rsa_buf_status & 0x08))) {
#endif /* PC98 */
/* break/unnattached error bits or real input? */
#ifdef PC98
if (IS_8251(com->pc98_if_type)) {
if (com->pc98_8251fifo_enable) {
recv_data = inb(I8251F_data);
if (tmp &
(FLSR_PE | FLSR_OE | FLSR_BI)) {
pc98_i8251_or_cmd(com, CMD8251_ER);
recv_data = 0;
}
} else {
recv_data = inb(com->data_port);
if (tmp & (STS8251_PE | STS8251_OE |
STS8251_FE | STS8251_BI)) {
pc98_i8251_or_cmd(com, CMD8251_ER);
recv_data = 0;
}
}
} else if (com->pc98_if_type == COM_IF_RSA98III) {
if (!(rsa_buf_status & 0x08))
recv_data = 0;
else
recv_data = inb(com->data_port);
} else
#endif
if (!(line_status & LSR_RXRDY))
recv_data = 0;
else
recv_data = inb(com->data_port);
#ifdef KDB
#ifdef ALT_BREAK_TO_DEBUGGER
if (com->unit == comconsole &&
(kdb_brk = kdb_alt_break(recv_data,
&com->alt_brk_state)) != 0) {
mtx_unlock_spin(&sio_lock);
switch (kdb_brk) {
case KDB_REQ_DEBUGGER:
kdb_enter(KDB_WHY_BREAK,
"Break sequence on console");
break;
case KDB_REQ_PANIC:
kdb_panic("panic on console");
break;
case KDB_REQ_REBOOT:
kdb_reboot();
break;
}
mtx_lock_spin(&sio_lock);
goto again;
}
#endif /* ALT_BREAK_TO_DEBUGGER */
#endif /* KDB */
if (line_status & (LSR_BI | LSR_FE | LSR_PE)) {
/*
* Don't store BI if IGNBRK or FE/PE if IGNPAR.
* Otherwise, push the work to a higher level
* (to handle PARMRK) if we're bypassing.
* Otherwise, convert BI/FE and PE+INPCK to 0.
*
* This makes bypassing work right in the
* usual "raw" case (IGNBRK set, and IGNPAR
* and INPCK clear).
*
* Note: BI together with FE/PE means just BI.
*/
if (line_status & LSR_BI) {
#if defined(KDB) && defined(BREAK_TO_DEBUGGER)
if (com->unit == comconsole) {
kdb_enter(KDB_WHY_BREAK,
"Line break on console");
goto cont;
}
#endif
if (com->tp == NULL
|| com->tp->t_iflag & IGNBRK)
goto cont;
} else {
if (com->tp == NULL
|| com->tp->t_iflag & IGNPAR)
goto cont;
}
if (com->tp->t_state & TS_CAN_BYPASS_L_RINT
&& (line_status & (LSR_BI | LSR_FE)
|| com->tp->t_iflag & INPCK))
recv_data = 0;
}
++com->bytes_in;
if (com->tp != NULL &&
com->tp->t_hotchar != 0 && recv_data == com->tp->t_hotchar)
swi_sched(sio_fast_ih, 0);
ioptr = com->iptr;
if (ioptr >= com->ibufend)
CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW);
else {
if (com->tp != NULL && com->tp->t_do_timestamp)
microtime(&com->tp->t_timestamp);
++com_events;
swi_sched(sio_slow_ih, SWI_DELAY);
#if 0 /* for testing input latency vs efficiency */
if (com->iptr - com->ibuf == 8)
swi_sched(sio_fast_ih, 0);
#endif
ioptr[0] = recv_data;
ioptr[com->ierroff] = line_status;
com->iptr = ++ioptr;
if (ioptr == com->ihighwater
&& com->state & CS_RTS_IFLOW)
#ifdef PC98
IS_8251(com->pc98_if_type) ?
com_tiocm_bic(com, TIOCM_RTS) :
#endif
outb(com->modem_ctl_port,
com->mcr_image &= ~MCR_RTS);
if (line_status & LSR_OE)
CE_RECORD(com, CE_OVERRUN);
}
cont:
if (line_status & LSR_TXRDY
&& com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY))
goto txrdy;
/*
* "& 0x7F" is to avoid the gcc-1.40 generating a slow
* jump from the top of the loop to here
*/
#ifdef PC98
if (IS_8251(com->pc98_if_type))
goto status_read;
else
#endif
line_status = inb(com->line_status_port) & 0x7F;
#ifdef PC98
if (com->pc98_if_type == COM_IF_RSA98III)
rsa_buf_status = inb(com->rsabase + rsa_srr);
#endif /* PC98 */
}
/* modem status change? (always check before doing output) */
#ifdef PC98
if (!IS_8251(com->pc98_if_type)) {
#endif
modem_status = inb(com->modem_status_port);
if (modem_status != com->last_modem_status) {
/*
* Schedule high level to handle DCD changes. Note
* that we don't use the delta bits anywhere. Some
* UARTs mess them up, and it's easy to remember the
* previous bits and calculate the delta.
*/
com->last_modem_status = modem_status;
if (!(com->state & CS_CHECKMSR)) {
com_events += LOTS_OF_EVENTS;
com->state |= CS_CHECKMSR;
swi_sched(sio_fast_ih, 0);
}
/* handle CTS change immediately for crisp flow ctl */
if (com->state & CS_CTS_OFLOW) {
if (modem_status & MSR_CTS)
com->state |= CS_ODEVREADY;
else
com->state &= ~CS_ODEVREADY;
}
}
#ifdef PC98
}
#endif
txrdy:
/* output queued and everything ready? */
#ifndef PC98
if (line_status & LSR_TXRDY
&& com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) {
#else
if (((com->pc98_if_type == COM_IF_RSA98III)
? (rsa_buf_status & 0x02)
: (line_status & LSR_TXRDY))
&& com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) {
#endif
#ifdef PC98
Port_t tmp_data_port;
if (IS_8251(com->pc98_if_type) &&
com->pc98_8251fifo_enable)
tmp_data_port = I8251F_data;
else
tmp_data_port = com->data_port;
#endif
ioptr = com->obufq.l_head;
if (com->tx_fifo_size > 1 && com->unit != siotsunit) {
u_int ocount;
ocount = com->obufq.l_tail - ioptr;
#ifdef PC98
if (com->pc98_if_type == COM_IF_RSA98III) {
rsa_buf_status = inb(com->rsabase + rsa_srr);
rsa_tx_fifo_size = 1024;
if (!(rsa_buf_status & 0x01))
rsa_tx_fifo_size = 2048;
if (ocount > rsa_tx_fifo_size)
ocount = rsa_tx_fifo_size;
} else
#endif
if (ocount > com->tx_fifo_size)
ocount = com->tx_fifo_size;
com->bytes_out += ocount;
do
#ifdef PC98
outb(tmp_data_port, *ioptr++);
#else
outb(com->data_port, *ioptr++);
#endif
while (--ocount != 0);
} else {
#ifdef PC98
outb(tmp_data_port, *ioptr++);
#else
outb(com->data_port, *ioptr++);
#endif
++com->bytes_out;
if (com->unit == siotsunit
&& siotso < sizeof siots / sizeof siots[0])
nanouptime(&siots[siotso++]);
}
#ifdef PC98
if (IS_8251(com->pc98_if_type))
if (!(pc98_check_i8251_interrupt(com) & IEN_TxFLAG))
com_int_Tx_enable(com);
#endif
com->obufq.l_head = ioptr;
if (COM_IIR_TXRDYBUG(com->flags))
int_ctl_new = int_ctl | IER_ETXRDY;
if (ioptr >= com->obufq.l_tail) {
struct lbq *qp;
qp = com->obufq.l_next;
qp->l_queued = FALSE;
qp = qp->l_next;
if (qp != NULL) {
com->obufq.l_head = qp->l_head;
com->obufq.l_tail = qp->l_tail;
com->obufq.l_next = qp;
} else {
/* output just completed */
if (COM_IIR_TXRDYBUG(com->flags))
int_ctl_new = int_ctl
& ~IER_ETXRDY;
com->state &= ~CS_BUSY;
#if defined(PC98)
if (IS_8251(com->pc98_if_type) &&
pc98_check_i8251_interrupt(com) & IEN_TxFLAG)
com_int_Tx_disable(com);
#endif
}
if (!(com->state & CS_ODONE)) {
com_events += LOTS_OF_EVENTS;
com->state |= CS_ODONE;
/* handle at high level ASAP */
swi_sched(sio_fast_ih, 0);
}
}
#ifdef PC98
if (COM_IIR_TXRDYBUG(com->flags)
&& int_ctl != int_ctl_new) {
if (com->pc98_if_type == COM_IF_RSA98III) {
int_ctl_new &= ~(IER_ETXRDY | IER_ERXRDY);
outb(com->int_ctl_port, int_ctl_new);
outb(com->rsabase + rsa_ier, 0x1d);
} else
outb(com->int_ctl_port, int_ctl_new);
}
#else
if (COM_IIR_TXRDYBUG(com->flags)
&& int_ctl != int_ctl_new)
outb(com->int_ctl_port, int_ctl_new);
#endif
}
#ifdef PC98
else if (line_status & LSR_TXRDY) {
if (IS_8251(com->pc98_if_type))
if (pc98_check_i8251_interrupt(com) & IEN_TxFLAG)
com_int_Tx_disable(com);
}
if (IS_8251(com->pc98_if_type)) {
if (com->pc98_8251fifo_enable) {
if ((tmp = inb(I8251F_lsr)) & FLSR_RxRDY)
goto more_intr;
} else {
if ((tmp = inb(com->sts_port)) & STS8251_RxRDY)
goto more_intr;
}
}
#endif
/* finished? */
#ifndef COM_MULTIPORT
#ifdef PC98
if (IS_8251(com->pc98_if_type))
return;
#endif
if ((inb(com->int_id_port) & IIR_IMASK) == IIR_NOPEND)
#endif /* COM_MULTIPORT */
return;
}
}
/* software interrupt handler for SWI_TTY */
static void
siopoll(void *dummy)
{
int unit;
if (com_events == 0)
return;
repeat:
for (unit = 0; unit < sio_numunits; ++unit) {
struct com_s *com;
int incc;
struct tty *tp;
com = com_addr(unit);
if (com == NULL)
continue;
tp = com->tp;
if (tp == NULL || com->gone) {
/*
* Discard any events related to never-opened or
* going-away devices.
*/
mtx_lock_spin(&sio_lock);
incc = com->iptr - com->ibuf;
com->iptr = com->ibuf;
if (com->state & CS_CHECKMSR) {
incc += LOTS_OF_EVENTS;
com->state &= ~CS_CHECKMSR;
}
com_events -= incc;
mtx_unlock_spin(&sio_lock);
continue;
}
if (com->iptr != com->ibuf) {
mtx_lock_spin(&sio_lock);
sioinput(com);
mtx_unlock_spin(&sio_lock);
}
if (com->state & CS_CHECKMSR) {
u_char delta_modem_status;
#ifdef PC98
if (!IS_8251(com->pc98_if_type)) {
#endif
mtx_lock_spin(&sio_lock);
delta_modem_status = com->last_modem_status
^ com->prev_modem_status;
com->prev_modem_status = com->last_modem_status;
com_events -= LOTS_OF_EVENTS;
com->state &= ~CS_CHECKMSR;
mtx_unlock_spin(&sio_lock);
if (delta_modem_status & MSR_DCD)
ttyld_modem(tp,
com->prev_modem_status & MSR_DCD);
#ifdef PC98
}
#endif
}
if (com->state & CS_ODONE) {
mtx_lock_spin(&sio_lock);
com_events -= LOTS_OF_EVENTS;
com->state &= ~CS_ODONE;
mtx_unlock_spin(&sio_lock);
if (!(com->state & CS_BUSY)
&& !(com->extra_state & CSE_BUSYCHECK)) {
timeout(siobusycheck, com, hz / 100);
com->extra_state |= CSE_BUSYCHECK;
}
ttyld_start(tp);
}
if (com_events == 0)
break;
}
if (com_events >= LOTS_OF_EVENTS)
goto repeat;
}
static void
combreak(tp, sig)
struct tty *tp;
int sig;
{
struct com_s *com;
com = tp->t_sc;
#ifdef PC98
if (sig)
com_send_break_on(com);
else
com_send_break_off(com);
#else
if (sig)
sio_setreg(com, com_cfcr, com->cfcr_image |= CFCR_SBREAK);
else
sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK);
#endif
}
static int
comparam(tp, t)
struct tty *tp;
struct termios *t;
{
u_int cfcr;
int cflag;
struct com_s *com;
u_int divisor;
u_char dlbh;
u_char dlbl;
u_char efr_flowbits;
int s;
#ifdef PC98
u_char param = 0;
#endif
com = tp->t_sc;
if (com == NULL)
return (ENODEV);
#ifdef PC98
cfcr = 0;
if (IS_8251(com->pc98_if_type)) {
if (pc98_ttspeedtab(com, t->c_ospeed, &divisor) != 0)
return (EINVAL);
} else {
#endif
/* check requested parameters */
if (t->c_ispeed != (t->c_ospeed != 0 ? t->c_ospeed : tp->t_ospeed))
return (EINVAL);
divisor = siodivisor(com->rclk, t->c_ispeed);
if (divisor == 0)
return (EINVAL);
#ifdef PC98
}
#endif
/* parameters are OK, convert them to the com struct and the device */
s = spltty();
#ifdef PC98
if (IS_8251(com->pc98_if_type)) {
if (t->c_ospeed == 0)
com_tiocm_bic(com, TIOCM_DTR|TIOCM_RTS|TIOCM_LE);
else
com_tiocm_bis(com, TIOCM_DTR|TIOCM_RTS|TIOCM_LE);
} else
#endif
if (t->c_ospeed == 0)
(void)commodem(tp, 0, SER_DTR); /* hang up line */
else
(void)commodem(tp, SER_DTR, 0);
cflag = t->c_cflag;
#ifdef PC98
if (!IS_8251(com->pc98_if_type)) {
#endif
switch (cflag & CSIZE) {
case CS5:
cfcr = CFCR_5BITS;
break;
case CS6:
cfcr = CFCR_6BITS;
break;
case CS7:
cfcr = CFCR_7BITS;
break;
default:
cfcr = CFCR_8BITS;
break;
}
if (cflag & PARENB) {
cfcr |= CFCR_PENAB;
if (!(cflag & PARODD))
cfcr |= CFCR_PEVEN;
}
if (cflag & CSTOPB)
cfcr |= CFCR_STOPB;
if (com->hasfifo) {
/*
* Use a fifo trigger level low enough so that the input
* latency from the fifo is less than about 16 msec and
* the total latency is less than about 30 msec. These
* latencies are reasonable for humans. Serial comms
* protocols shouldn't expect anything better since modem
* latencies are larger.
*
* The fifo trigger level cannot be set at RX_HIGH for high
* speed connections without further work on reducing
* interrupt disablement times in other parts of the system,
* without producing silo overflow errors.
*/
com->fifo_image = com->unit == siotsunit ? 0
: t->c_ispeed <= 4800
? FIFO_ENABLE : FIFO_ENABLE | FIFO_RX_MEDH;
#ifdef COM_ESP
/*
* The Hayes ESP card needs the fifo DMA mode bit set
* in compatibility mode. If not, it will interrupt
* for each character received.
*/
if (com->esp)
com->fifo_image |= FIFO_DMA_MODE;
#endif
sio_setreg(com, com_fifo, com->fifo_image);
}
#ifdef PC98
}
#endif
/*
* This returns with interrupts disabled so that we can complete
* the speed change atomically. Keeping interrupts disabled is
* especially important while com_data is hidden.
*/
(void) siosetwater(com, t->c_ispeed);
#ifdef PC98
if (IS_8251(com->pc98_if_type))
com_cflag_and_speed_set(com, cflag, t->c_ospeed);
else {
#endif
sio_setreg(com, com_cfcr, cfcr | CFCR_DLAB);
/*
* Only set the divisor registers if they would change, since on
* some 16550 incompatibles (UMC8669F), setting them while input
* is arriving loses sync until data stops arriving.
*/
dlbl = divisor & 0xFF;
if (sio_getreg(com, com_dlbl) != dlbl)
sio_setreg(com, com_dlbl, dlbl);
dlbh = divisor >> 8;
if (sio_getreg(com, com_dlbh) != dlbh)
sio_setreg(com, com_dlbh, dlbh);
#ifdef PC98
}
#endif
efr_flowbits = 0;
if (cflag & CRTS_IFLOW) {
com->state |= CS_RTS_IFLOW;
efr_flowbits |= EFR_AUTORTS;
/*
* If CS_RTS_IFLOW just changed from off to on, the change
* needs to be propagated to MCR_RTS. This isn't urgent,
* so do it later by calling comstart() instead of repeating
* a lot of code from comstart() here.
*/
} else if (com->state & CS_RTS_IFLOW) {
com->state &= ~CS_RTS_IFLOW;
/*
* CS_RTS_IFLOW just changed from on to off. Force MCR_RTS
* on here, since comstart() won't do it later.
*/
#ifdef PC98
if (IS_8251(com->pc98_if_type))
com_tiocm_bis(com, TIOCM_RTS);
else
outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS);
#else
outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS);
#endif
}
/*
* Set up state to handle output flow control.
* XXX - worth handling MDMBUF (DCD) flow control at the lowest level?
* Now has 10+ msec latency, while CTS flow has 50- usec latency.
*/
com->state |= CS_ODEVREADY;
com->state &= ~CS_CTS_OFLOW;
#ifdef PC98
if (com->pc98_if_type == COM_IF_RSA98III) {
param = inb(com->rsabase + rsa_msr);
outb(com->rsabase + rsa_msr, param & 0x14);
}
#endif
if (cflag & CCTS_OFLOW) {
com->state |= CS_CTS_OFLOW;
efr_flowbits |= EFR_AUTOCTS;
#ifdef PC98
if (IS_8251(com->pc98_if_type)) {
if (!(pc98_get_modem_status(com) & TIOCM_CTS))
com->state &= ~CS_ODEVREADY;
} else if (com->pc98_if_type == COM_IF_RSA98III) {
/* Set automatic flow control mode */
outb(com->rsabase + rsa_msr, param | 0x08);
} else
#endif
if (!(com->last_modem_status & MSR_CTS))
com->state &= ~CS_ODEVREADY;
}
#ifdef PC98
if (!IS_8251(com->pc98_if_type))
sio_setreg(com, com_cfcr, com->cfcr_image = cfcr);
#else
if (com->st16650a) {
sio_setreg(com, com_lcr, LCR_EFR_ENABLE);
sio_setreg(com, com_efr,
(sio_getreg(com, com_efr)
& ~(EFR_AUTOCTS | EFR_AUTORTS)) | efr_flowbits);
}
sio_setreg(com, com_cfcr, com->cfcr_image = cfcr);
#endif
/* XXX shouldn't call functions while intrs are disabled. */
ttyldoptim(tp);
mtx_unlock_spin(&sio_lock);
splx(s);
comstart(tp);
if (com->ibufold != NULL) {
free(com->ibufold, M_DEVBUF);
com->ibufold = NULL;
}
return (0);
}
/*
* This function must be called with the sio_lock mutex released and will
* return with it obtained.
*/
static int
siosetwater(com, speed)
struct com_s *com;
speed_t speed;
{
int cp4ticks;
u_char *ibuf;
int ibufsize;
struct tty *tp;
/*
* Make the buffer size large enough to handle a softtty interrupt
* latency of about 2 ticks without loss of throughput or data
* (about 3 ticks if input flow control is not used or not honoured,
* but a bit less for CS5-CS7 modes).
*/
cp4ticks = speed / 10 / hz * 4;
for (ibufsize = 128; ibufsize < cp4ticks;)
ibufsize <<= 1;
#ifdef PC98
if (com->pc98_if_type == COM_IF_RSA98III)
ibufsize = 2048;
#endif
if (ibufsize == com->ibufsize) {
mtx_lock_spin(&sio_lock);
return (0);
}
/*
* Allocate input buffer. The extra factor of 2 in the size is
* to allow for an error byte for each input byte.
*/
ibuf = malloc(2 * ibufsize, M_DEVBUF, M_NOWAIT);
if (ibuf == NULL) {
mtx_lock_spin(&sio_lock);
return (ENOMEM);
}
/* Initialize non-critical variables. */
com->ibufold = com->ibuf;
com->ibufsize = ibufsize;
tp = com->tp;
if (tp != NULL) {
tp->t_ififosize = 2 * ibufsize;
tp->t_ispeedwat = (speed_t)-1;
tp->t_ospeedwat = (speed_t)-1;
}
/*
* Read current input buffer, if any. Continue with interrupts
* disabled.
*/
mtx_lock_spin(&sio_lock);
if (com->iptr != com->ibuf)
sioinput(com);
/*-
* Initialize critical variables, including input buffer watermarks.
* The external device is asked to stop sending when the buffer
* exactly reaches high water, or when the high level requests it.
* The high level is notified immediately (rather than at a later
* clock tick) when this watermark is reached.
* The buffer size is chosen so the watermark should almost never
* be reached.
* The low watermark is invisibly 0 since the buffer is always
* emptied all at once.
*/
com->iptr = com->ibuf = ibuf;
com->ibufend = ibuf + ibufsize;
com->ierroff = ibufsize;
com->ihighwater = ibuf + 3 * ibufsize / 4;
return (0);
}
static void
comstart(tp)
struct tty *tp;
{
struct com_s *com;
int s;
com = tp->t_sc;
if (com == NULL)
return;
s = spltty();
mtx_lock_spin(&sio_lock);
if (tp->t_state & TS_TTSTOP)
com->state &= ~CS_TTGO;
else
com->state |= CS_TTGO;
if (tp->t_state & TS_TBLOCK) {
#ifdef PC98
if (IS_8251(com->pc98_if_type)) {
if ((com_tiocm_get(com) & TIOCM_RTS) &&
(com->state & CS_RTS_IFLOW))
com_tiocm_bic(com, TIOCM_RTS);
} else {
if ((com->mcr_image & MCR_RTS) &&
(com->state & CS_RTS_IFLOW))
outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS);
}
#else
if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW)
outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS);
#endif
} else {
#ifdef PC98
if (IS_8251(com->pc98_if_type)) {
if (!(com_tiocm_get(com) & TIOCM_RTS) &&
com->iptr < com->ihighwater &&
com->state & CS_RTS_IFLOW)
com_tiocm_bis(com, TIOCM_RTS);
} else {
if (!(com->mcr_image & MCR_RTS) &&
com->iptr < com->ihighwater &&
com->state & CS_RTS_IFLOW)
outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS);
}
#else
if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater
&& com->state & CS_RTS_IFLOW)
outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS);
#endif
}
mtx_unlock_spin(&sio_lock);
if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) {
ttwwakeup(tp);
splx(s);
return;
}
if (tp->t_outq.c_cc != 0) {
struct lbq *qp;
struct lbq *next;
if (!com->obufs[0].l_queued) {
com->obufs[0].l_tail
= com->obuf1 + q_to_b(&tp->t_outq, com->obuf1,
#ifdef PC98
com->obufsize);
#else
sizeof com->obuf1);
#endif
com->obufs[0].l_next = NULL;
com->obufs[0].l_queued = TRUE;
mtx_lock_spin(&sio_lock);
if (com->state & CS_BUSY) {
qp = com->obufq.l_next;
while ((next = qp->l_next) != NULL)
qp = next;
qp->l_next = &com->obufs[0];
} else {
com->obufq.l_head = com->obufs[0].l_head;
com->obufq.l_tail = com->obufs[0].l_tail;
com->obufq.l_next = &com->obufs[0];
com->state |= CS_BUSY;
}
mtx_unlock_spin(&sio_lock);
}
if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) {
com->obufs[1].l_tail
= com->obuf2 + q_to_b(&tp->t_outq, com->obuf2,
#ifdef PC98
com->obufsize);
#else
sizeof com->obuf2);
#endif
com->obufs[1].l_next = NULL;
com->obufs[1].l_queued = TRUE;
mtx_lock_spin(&sio_lock);
if (com->state & CS_BUSY) {
qp = com->obufq.l_next;
while ((next = qp->l_next) != NULL)
qp = next;
qp->l_next = &com->obufs[1];
} else {
com->obufq.l_head = com->obufs[1].l_head;
com->obufq.l_tail = com->obufs[1].l_tail;
com->obufq.l_next = &com->obufs[1];
com->state |= CS_BUSY;
}
mtx_unlock_spin(&sio_lock);
}
tp->t_state |= TS_BUSY;
}
mtx_lock_spin(&sio_lock);
if (com->state >= (CS_BUSY | CS_TTGO))
siointr1(com); /* fake interrupt to start output */
mtx_unlock_spin(&sio_lock);
ttwwakeup(tp);
splx(s);
}
static void
comstop(tp, rw)
struct tty *tp;
int rw;
{
struct com_s *com;
#ifdef PC98
int rsa98_tmp = 0;
#endif
com = tp->t_sc;
if (com == NULL || com->gone)
return;
mtx_lock_spin(&sio_lock);
if (rw & FWRITE) {
#ifdef PC98
if (!IS_8251(com->pc98_if_type)) {
#endif
if (com->hasfifo)
#ifdef COM_ESP
/* XXX avoid h/w bug. */
if (!com->esp)
#endif
sio_setreg(com, com_fifo,
FIFO_XMT_RST | com->fifo_image);
#ifdef PC98
if (com->pc98_if_type == COM_IF_RSA98III)
for (rsa98_tmp = 0; rsa98_tmp < 2048; rsa98_tmp++)
sio_setreg(com, com_fifo,
FIFO_XMT_RST | com->fifo_image);
}
#endif
com->obufs[0].l_queued = FALSE;
com->obufs[1].l_queued = FALSE;
if (com->state & CS_ODONE)
com_events -= LOTS_OF_EVENTS;
com->state &= ~(CS_ODONE | CS_BUSY);
com->tp->t_state &= ~TS_BUSY;
}
if (rw & FREAD) {
#ifdef PC98
if (!IS_8251(com->pc98_if_type)) {
if (com->pc98_if_type == COM_IF_RSA98III)
for (rsa98_tmp = 0; rsa98_tmp < 2048; rsa98_tmp++)
sio_getreg(com, com_data);
#endif
if (com->hasfifo)
#ifdef COM_ESP
/* XXX avoid h/w bug. */
if (!com->esp)
#endif
sio_setreg(com, com_fifo,
FIFO_RCV_RST | com->fifo_image);
#ifdef PC98
}
#endif
com_events -= (com->iptr - com->ibuf);
com->iptr = com->ibuf;
}
mtx_unlock_spin(&sio_lock);
comstart(tp);
}
static int
commodem(struct tty *tp, int sigon, int sigoff)
{
struct com_s *com;
int bitand, bitor, msr;
#ifdef PC98
int clr, set;
#endif
com = tp->t_sc;
if (com->gone)
return(0);
if (sigon != 0 || sigoff != 0) {
#ifdef PC98
if (IS_8251(com->pc98_if_type)) {
bitand = bitor = 0;
clr = set = 0;
if (sigoff & SER_DTR) {
bitand |= TIOCM_DTR;
clr |= CMD8251_DTR;
}
if (sigoff & SER_RTS) {
bitand |= TIOCM_RTS;
clr |= CMD8251_RxEN | CMD8251_RTS;
}
if (sigon & SER_DTR) {
bitor |= TIOCM_DTR;
set |= CMD8251_TxEN | CMD8251_RxEN |
CMD8251_DTR;
}
if (sigon & SER_RTS) {
bitor |= TIOCM_RTS;
set |= CMD8251_TxEN | CMD8251_RxEN |
CMD8251_RTS;
}
bitand = ~bitand;
mtx_lock_spin(&sio_lock);
com->pc98_prev_modem_status &= bitand;
com->pc98_prev_modem_status |= bitor;
pc98_i8251_clear_or_cmd(com, clr, set);
mtx_unlock_spin(&sio_lock);
return (0);
} else {
#endif
bitand = bitor = 0;
if (sigoff & SER_DTR)
bitand |= MCR_DTR;
if (sigoff & SER_RTS)
bitand |= MCR_RTS;
if (sigon & SER_DTR)
bitor |= MCR_DTR;
if (sigon & SER_RTS)
bitor |= MCR_RTS;
bitand = ~bitand;
mtx_lock_spin(&sio_lock);
com->mcr_image &= bitand;
com->mcr_image |= bitor;
outb(com->modem_ctl_port, com->mcr_image);
mtx_unlock_spin(&sio_lock);
return (0);
#ifdef PC98
}
#endif
} else {
#ifdef PC98
if (IS_8251(com->pc98_if_type))
return (com_tiocm_get(com));
else {
#endif
bitor = 0;
if (com->mcr_image & MCR_DTR)
bitor |= SER_DTR;
if (com->mcr_image & MCR_RTS)
bitor |= SER_RTS;
msr = com->prev_modem_status;
if (msr & MSR_CTS)
bitor |= SER_CTS;
if (msr & MSR_DCD)
bitor |= SER_DCD;
if (msr & MSR_DSR)
bitor |= SER_DSR;
if (msr & MSR_DSR)
bitor |= SER_DSR;
if (msr & (MSR_RI | MSR_TERI))
bitor |= SER_RI;
return (bitor);
#ifdef PC98
}
#endif
}
}
static void
siosettimeout()
{
struct com_s *com;
bool_t someopen;
int unit;
/*
* Set our timeout period to 1 second if no polled devices are open.
* Otherwise set it to max(1/200, 1/hz).
* Enable timeouts iff some device is open.
*/
untimeout(comwakeup, (void *)NULL, sio_timeout_handle);
sio_timeout = hz;
someopen = FALSE;
for (unit = 0; unit < sio_numunits; ++unit) {
com = com_addr(unit);
if (com != NULL && com->tp != NULL
&& com->tp->t_state & TS_ISOPEN && !com->gone) {
someopen = TRUE;
if (com->poll || com->poll_output) {
sio_timeout = hz > 200 ? hz / 200 : 1;
break;
}
}
}
if (someopen) {
sio_timeouts_until_log = hz / sio_timeout;
sio_timeout_handle = timeout(comwakeup, (void *)NULL,
sio_timeout);
} else {
/* Flush error messages, if any. */
sio_timeouts_until_log = 1;
comwakeup((void *)NULL);
untimeout(comwakeup, (void *)NULL, sio_timeout_handle);
}
}
static void
comwakeup(chan)
void *chan;
{
struct com_s *com;
int unit;
sio_timeout_handle = timeout(comwakeup, (void *)NULL, sio_timeout);
/*
* Recover from lost output interrupts.
* Poll any lines that don't use interrupts.
*/
for (unit = 0; unit < sio_numunits; ++unit) {
com = com_addr(unit);
if (com != NULL && !com->gone
&& (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) {
mtx_lock_spin(&sio_lock);
siointr1(com);
mtx_unlock_spin(&sio_lock);
}
}
/*
* Check for and log errors, but not too often.
*/
if (--sio_timeouts_until_log > 0)
return;
sio_timeouts_until_log = hz / sio_timeout;
for (unit = 0; unit < sio_numunits; ++unit) {
int errnum;
com = com_addr(unit);
if (com == NULL)
continue;
if (com->gone)
continue;
for (errnum = 0; errnum < CE_NTYPES; ++errnum) {
u_int delta;
u_long total;
mtx_lock_spin(&sio_lock);
delta = com->delta_error_counts[errnum];
com->delta_error_counts[errnum] = 0;
mtx_unlock_spin(&sio_lock);
if (delta == 0)
continue;
total = com->error_counts[errnum] += delta;
log(LOG_ERR, "sio%d: %u more %s%s (total %lu)\n",
unit, delta, error_desc[errnum],
delta == 1 ? "" : "s", total);
}
}
}
#ifdef PC98
/* commint is called when modem control line changes */
static void
commint(struct cdev *dev)
{
register struct tty *tp;
int stat,delta;
struct com_s *com;
com = dev->si_drv1;
tp = com->tp;
stat = com_tiocm_get(com);
delta = com_tiocm_get_delta(com);
if (com->state & CS_CTS_OFLOW) {
if (stat & TIOCM_CTS)
com->state |= CS_ODEVREADY;
else
com->state &= ~CS_ODEVREADY;
}
if ((delta & TIOCM_CAR) && (ISCALLOUT(dev)) == 0) {
if (stat & TIOCM_CAR )
(void)ttyld_modem(tp, 1);
else if (ttyld_modem(tp, 0) == 0) {
/* negate DTR, RTS */
com_tiocm_bic(com, (tp->t_cflag & HUPCL) ?
TIOCM_DTR|TIOCM_RTS|TIOCM_LE : TIOCM_LE );
/* disable IENABLE */
com_int_TxRx_disable( com );
}
}
}
#endif
/*
* Following are all routines needed for SIO to act as console
*/
struct siocnstate {
u_char dlbl;
u_char dlbh;
u_char ier;
u_char cfcr;
u_char mcr;
};
/*
* This is a function in order to not replicate "ttyd%d" more
* places than absolutely necessary.
*/
static void
siocnset(struct consdev *cd, int unit)
{
cd->cn_unit = unit;
sprintf(cd->cn_name, "ttyd%d", unit);
}
static speed_t siocngetspeed(Port_t, u_long rclk);
static void siocnclose(struct siocnstate *sp, Port_t iobase);
static void siocnopen(struct siocnstate *sp, Port_t iobase, int speed);
static void siocntxwait(Port_t iobase);
static cn_probe_t sio_cnprobe;
static cn_init_t sio_cninit;
static cn_term_t sio_cnterm;
static cn_getc_t sio_cngetc;
static cn_putc_t sio_cnputc;
CONSOLE_DRIVER(sio);
static void
siocntxwait(iobase)
Port_t iobase;
{
int timo;
/*
* Wait for any pending transmission to finish. Required to avoid
* the UART lockup bug when the speed is changed, and for normal
* transmits.
*/
timo = 100000;
while ((inb(iobase + com_lsr) & (LSR_TSRE | LSR_TXRDY))
!= (LSR_TSRE | LSR_TXRDY) && --timo != 0)
;
}
/*
* Read the serial port specified and try to figure out what speed
* it's currently running at. We're assuming the serial port has
* been initialized and is basicly idle. This routine is only intended
* to be run at system startup.
*
* If the value read from the serial port doesn't make sense, return 0.
*/
static speed_t
siocngetspeed(iobase, rclk)
Port_t iobase;
u_long rclk;
{
u_int divisor;
u_char dlbh;
u_char dlbl;
u_char cfcr;
cfcr = inb(iobase + com_cfcr);
outb(iobase + com_cfcr, CFCR_DLAB | cfcr);
dlbl = inb(iobase + com_dlbl);
dlbh = inb(iobase + com_dlbh);
outb(iobase + com_cfcr, cfcr);
divisor = dlbh << 8 | dlbl;
/* XXX there should be more sanity checking. */
if (divisor == 0)
return (CONSPEED);
return (rclk / (16UL * divisor));
}
static void
siocnopen(sp, iobase, speed)
struct siocnstate *sp;
Port_t iobase;
int speed;
{
u_int divisor;
u_char dlbh;
u_char dlbl;
/*
* Save all the device control registers except the fifo register
* and set our default ones (cs8 -parenb speed=comdefaultrate).
* We can't save the fifo register since it is read-only.
*/
sp->ier = inb(iobase + com_ier);
outb(iobase + com_ier, 0); /* spltty() doesn't stop siointr() */
siocntxwait(iobase);
sp->cfcr = inb(iobase + com_cfcr);
outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS);
sp->dlbl = inb(iobase + com_dlbl);
sp->dlbh = inb(iobase + com_dlbh);
/*
* Only set the divisor registers if they would change, since on
* some 16550 incompatibles (Startech), setting them clears the
* data input register. This also reduces the effects of the
* UMC8669F bug.
*/
divisor = siodivisor(comdefaultrclk, speed);
dlbl = divisor & 0xFF;
if (sp->dlbl != dlbl)
outb(iobase + com_dlbl, dlbl);
dlbh = divisor >> 8;
if (sp->dlbh != dlbh)
outb(iobase + com_dlbh, dlbh);
outb(iobase + com_cfcr, CFCR_8BITS);
sp->mcr = inb(iobase + com_mcr);
/*
* We don't want interrupts, but must be careful not to "disable"
* them by clearing the MCR_IENABLE bit, since that might cause
* an interrupt by floating the IRQ line.
*/
outb(iobase + com_mcr, (sp->mcr & MCR_IENABLE) | MCR_DTR | MCR_RTS);
}
static void
siocnclose(sp, iobase)
struct siocnstate *sp;
Port_t iobase;
{
/*
* Restore the device control registers.
*/
siocntxwait(iobase);
outb(iobase + com_cfcr, CFCR_DLAB | CFCR_8BITS);
if (sp->dlbl != inb(iobase + com_dlbl))
outb(iobase + com_dlbl, sp->dlbl);
if (sp->dlbh != inb(iobase + com_dlbh))
outb(iobase + com_dlbh, sp->dlbh);
outb(iobase + com_cfcr, sp->cfcr);
/*
* XXX damp oscillations of MCR_DTR and MCR_RTS by not restoring them.
*/
outb(iobase + com_mcr, sp->mcr | MCR_DTR | MCR_RTS);
outb(iobase + com_ier, sp->ier);
}
static void
sio_cnprobe(cp)
struct consdev *cp;
{
speed_t boot_speed;
u_char cfcr;
u_int divisor;
int s, unit;
struct siocnstate sp;
/*
* Find our first enabled console, if any. If it is a high-level
* console device, then initialize it and return successfully.
* If it is a low-level console device, then initialize it and
* return unsuccessfully. It must be initialized in both cases
* for early use by console drivers and debuggers. Initializing
* the hardware is not necessary in all cases, since the i/o
* routines initialize it on the fly, but it is necessary if
* input might arrive while the hardware is switched back to an
* uninitialized state. We can't handle multiple console devices
* yet because our low-level routines don't take a device arg.
* We trust the user to set the console flags properly so that we
* don't need to probe.
*/
cp->cn_pri = CN_DEAD;
for (unit = 0; unit < 16; unit++) { /* XXX need to know how many */
int flags;
if (resource_disabled("sio", unit))
continue;
if (resource_int_value("sio", unit, "flags", &flags))
continue;
if (COM_CONSOLE(flags) || COM_DEBUGGER(flags)) {
int port;
Port_t iobase;
if (resource_int_value("sio", unit, "port", &port))
continue;
iobase = port;
s = spltty();
if ((boothowto & RB_SERIAL) && COM_CONSOLE(flags)) {
boot_speed =
siocngetspeed(iobase, comdefaultrclk);
if (boot_speed)
comdefaultrate = boot_speed;
}
/*
* Initialize the divisor latch. We can't rely on
* siocnopen() to do this the first time, since it
* avoids writing to the latch if the latch appears
* to have the correct value. Also, if we didn't
* just read the speed from the hardware, then we
* need to set the speed in hardware so that
* switching it later is null.
*/
cfcr = inb(iobase + com_cfcr);
outb(iobase + com_cfcr, CFCR_DLAB | cfcr);
divisor = siodivisor(comdefaultrclk, comdefaultrate);
outb(iobase + com_dlbl, divisor & 0xff);
outb(iobase + com_dlbh, divisor >> 8);
outb(iobase + com_cfcr, cfcr);
siocnopen(&sp, iobase, comdefaultrate);
splx(s);
if (COM_CONSOLE(flags) && !COM_LLCONSOLE(flags)) {
siocnset(cp, unit);
cp->cn_pri = COM_FORCECONSOLE(flags)
|| boothowto & RB_SERIAL
? CN_REMOTE : CN_NORMAL;
siocniobase = iobase;
siocnunit = unit;
}
#ifdef GDB
if (COM_DEBUGGER(flags))
siogdbiobase = iobase;
#endif
}
}
}
static void
sio_cninit(cp)
struct consdev *cp;
{
comconsole = cp->cn_unit;
}
static void
sio_cnterm(cp)
struct consdev *cp;
{
comconsole = -1;
}
static int
sio_cngetc(struct consdev *cd)
{
int c;
Port_t iobase;
int s;
struct siocnstate sp;
speed_t speed;
if (cd != NULL && cd->cn_unit == siocnunit) {
iobase = siocniobase;
speed = comdefaultrate;
} else {
#ifdef GDB
iobase = siogdbiobase;
speed = gdbdefaultrate;
#else
return (-1);
#endif
}
s = spltty();
siocnopen(&sp, iobase, speed);
if (inb(iobase + com_lsr) & LSR_RXRDY)
c = inb(iobase + com_data);
else
c = -1;
siocnclose(&sp, iobase);
splx(s);
return (c);
}
static void
sio_cnputc(struct consdev *cd, int c)
{
int need_unlock;
int s;
struct siocnstate sp;
Port_t iobase;
speed_t speed;
if (cd != NULL && cd->cn_unit == siocnunit) {
iobase = siocniobase;
speed = comdefaultrate;
} else {
#ifdef GDB
iobase = siogdbiobase;
speed = gdbdefaultrate;
#else
return;
#endif
}
s = spltty();
need_unlock = 0;
if (!kdb_active && sio_inited == 2 && !mtx_owned(&sio_lock)) {
mtx_lock_spin(&sio_lock);
need_unlock = 1;
}
siocnopen(&sp, iobase, speed);
siocntxwait(iobase);
outb(iobase + com_data, c);
siocnclose(&sp, iobase);
if (need_unlock)
mtx_unlock_spin(&sio_lock);
splx(s);
}
/*
* Remote gdb(1) support.
*/
#if defined(GDB)
#include <gdb/gdb.h>
static gdb_probe_f siogdbprobe;
static gdb_init_f siogdbinit;
static gdb_term_f siogdbterm;
static gdb_getc_f siogdbgetc;
static gdb_putc_f siogdbputc;
GDB_DBGPORT(sio, siogdbprobe, siogdbinit, siogdbterm, siogdbgetc, siogdbputc);
static int
siogdbprobe(void)
{
return ((siogdbiobase != 0) ? 0 : -1);
}
static void
siogdbinit(void)
{
}
static void
siogdbterm(void)
{
}
static void
siogdbputc(int c)
{
sio_cnputc(NULL, c);
}
static int
siogdbgetc(void)
{
return (sio_cngetc(NULL));
}
#endif
#ifdef PC98
/*
* pc98 local function
*/
static void
com_tiocm_bis(struct com_s *com, int msr)
{
int s;
int tmp = 0;
s=spltty();
com->pc98_prev_modem_status |= ( msr & (TIOCM_LE|TIOCM_DTR|TIOCM_RTS) );
tmp |= CMD8251_TxEN|CMD8251_RxEN;
if ( msr & TIOCM_DTR ) tmp |= CMD8251_DTR;
if ( msr & TIOCM_RTS ) tmp |= CMD8251_RTS;
pc98_i8251_or_cmd( com, tmp );
splx(s);
}
static void
com_tiocm_bic(struct com_s *com, int msr)
{
int s;
int tmp = msr;
s=spltty();
com->pc98_prev_modem_status &= ~( msr & (TIOCM_LE|TIOCM_DTR|TIOCM_RTS) );
if ( msr & TIOCM_DTR ) tmp |= CMD8251_DTR;
if ( msr & TIOCM_RTS ) tmp |= CMD8251_RTS;
pc98_i8251_clear_cmd( com, tmp );
splx(s);
}
static int
com_tiocm_get(struct com_s *com)
{
return( com->pc98_prev_modem_status );
}
static int
com_tiocm_get_delta(struct com_s *com)
{
int tmp;
tmp = com->pc98_modem_delta;
com->pc98_modem_delta = 0;
return( tmp );
}
/* convert to TIOCM_?? ( ioctl.h ) */
static int
pc98_get_modem_status(struct com_s *com)
{
register int msr;
msr = com->pc98_prev_modem_status
& ~(TIOCM_CAR|TIOCM_RI|TIOCM_DSR|TIOCM_CTS);
if (com->pc98_8251fifo_enable) {
int stat2;
stat2 = inb(I8251F_msr);
if ( stat2 & MSR_DCD ) msr |= TIOCM_CAR;
if ( stat2 & MSR_RI ) msr |= TIOCM_RI;
if ( stat2 & MSR_DSR ) msr |= TIOCM_DSR;
if ( stat2 & MSR_CTS ) msr |= TIOCM_CTS;
#if COM_CARRIER_DETECT_EMULATE
if ( msr & (TIOCM_DSR|TIOCM_CTS) ) {
msr |= TIOCM_CAR;
}
#endif
} else {
int stat, stat2;
stat = inb(com->sts_port);
stat2 = inb(com->in_modem_port);
if ( !(stat2 & CICSCD_CD) ) msr |= TIOCM_CAR;
if ( !(stat2 & CICSCD_CI) ) msr |= TIOCM_RI;
if ( stat & STS8251_DSR ) msr |= TIOCM_DSR;
if ( !(stat2 & CICSCD_CS) ) msr |= TIOCM_CTS;
#if COM_CARRIER_DETECT_EMULATE
if ( msr & (TIOCM_DSR|TIOCM_CTS) ) {
msr |= TIOCM_CAR;
}
#endif
}
return(msr);
}
static void
pc98_check_msr(void* chan)
{
int msr, delta;
int s;
register struct tty *tp;
struct com_s *com;
struct cdev *dev;
dev=(struct cdev *)chan;
com = dev->si_drv1;
tp = dev->si_tty;
s = spltty();
msr = pc98_get_modem_status(com);
/* make change flag */
delta = msr ^ com->pc98_prev_modem_status;
if ( delta & TIOCM_CAR ) {
if ( com->modem_car_chg_timer ) {
if ( -- com->modem_car_chg_timer )
msr ^= TIOCM_CAR;
} else {
if ((com->modem_car_chg_timer = (msr & TIOCM_CAR) ?
DCD_ON_RECOGNITION : DCD_OFF_TOLERANCE) != 0)
msr ^= TIOCM_CAR;
}
} else
com->modem_car_chg_timer = 0;
delta = ( msr ^ com->pc98_prev_modem_status ) &
(TIOCM_CAR|TIOCM_RI|TIOCM_DSR|TIOCM_CTS);
com->pc98_prev_modem_status = msr;
delta = ( com->pc98_modem_delta |= delta );
splx(s);
if ( com->modem_checking || (tp->t_state & (TS_ISOPEN)) ) {
if ( delta ) {
commint(dev);
}
timeout(pc98_check_msr, (caddr_t)dev,
PC98_CHECK_MODEM_INTERVAL);
} else {
com->modem_checking = 0;
}
}
static void
pc98_msrint_start(struct cdev *dev)
{
struct com_s *com;
int s = spltty();
com = dev->si_drv1;
/* modem control line check routine envoke interval is 1/10 sec */
if ( com->modem_checking == 0 ) {
com->pc98_prev_modem_status = pc98_get_modem_status(com);
com->pc98_modem_delta = 0;
timeout(pc98_check_msr, (caddr_t)dev,
PC98_CHECK_MODEM_INTERVAL);
com->modem_checking = 1;
}
splx(s);
}
static void
pc98_disable_i8251_interrupt(struct com_s *com, int mod)
{
/* disable interrupt */
register int tmp;
mod |= ~(IEN_Tx|IEN_TxEMP|IEN_Rx);
COM_INT_DISABLE
tmp = inb( com->intr_ctrl_port ) & ~(IEN_Tx|IEN_TxEMP|IEN_Rx);
outb( com->intr_ctrl_port, (com->intr_enable&=~mod) | tmp );
COM_INT_ENABLE
}
static void
pc98_enable_i8251_interrupt(struct com_s *com, int mod)
{
register int tmp;
COM_INT_DISABLE
tmp = inb( com->intr_ctrl_port ) & ~(IEN_Tx|IEN_TxEMP|IEN_Rx);
outb( com->intr_ctrl_port, (com->intr_enable|=mod) | tmp );
COM_INT_ENABLE
}
static int
pc98_check_i8251_interrupt(struct com_s *com)
{
return ( com->intr_enable & 0x07 );
}
static void
pc98_i8251_clear_cmd(struct com_s *com, int x)
{
int tmp;
COM_INT_DISABLE
tmp = com->pc98_prev_siocmd & ~(x);
if (com->pc98_8251fifo_enable)
outb(I8251F_fcr, 0);
outb(com->cmd_port, tmp);
com->pc98_prev_siocmd = tmp & ~(CMD8251_ER|CMD8251_RESET|CMD8251_EH);
if (com->pc98_8251fifo_enable)
outb(I8251F_fcr, FIFO_ENABLE);
COM_INT_ENABLE
}
static void
pc98_i8251_or_cmd(struct com_s *com, int x)
{
int tmp;
COM_INT_DISABLE
if (com->pc98_8251fifo_enable)
outb(I8251F_fcr, 0);
tmp = com->pc98_prev_siocmd | (x);
outb(com->cmd_port, tmp);
com->pc98_prev_siocmd = tmp & ~(CMD8251_ER|CMD8251_RESET|CMD8251_EH);
if (com->pc98_8251fifo_enable)
outb(I8251F_fcr, FIFO_ENABLE);
COM_INT_ENABLE
}
static void
pc98_i8251_set_cmd(struct com_s *com, int x)
{
int tmp;
COM_INT_DISABLE
if (com->pc98_8251fifo_enable)
outb(I8251F_fcr, 0);
tmp = (x);
outb(com->cmd_port, tmp);
com->pc98_prev_siocmd = tmp & ~(CMD8251_ER|CMD8251_RESET|CMD8251_EH);
if (com->pc98_8251fifo_enable)
outb(I8251F_fcr, FIFO_ENABLE);
COM_INT_ENABLE
}
static void
pc98_i8251_clear_or_cmd(struct com_s *com, int clr, int x)
{
int tmp;
COM_INT_DISABLE
if (com->pc98_8251fifo_enable)
outb(I8251F_fcr, 0);
tmp = com->pc98_prev_siocmd & ~(clr);
tmp |= (x);
outb(com->cmd_port, tmp);
com->pc98_prev_siocmd = tmp & ~(CMD8251_ER|CMD8251_RESET|CMD8251_EH);
if (com->pc98_8251fifo_enable)
outb(I8251F_fcr, FIFO_ENABLE);
COM_INT_ENABLE
}
static int
pc98_i8251_get_cmd(struct com_s *com)
{
return com->pc98_prev_siocmd;
}
static int
pc98_i8251_get_mod(struct com_s *com)
{
return com->pc98_prev_siomod;
}
static void
pc98_i8251_reset(struct com_s *com, int mode, int command)
{
if (com->pc98_8251fifo_enable)
outb(I8251F_fcr, 0);
outb(com->cmd_port, 0); /* dummy */
DELAY(2);
outb(com->cmd_port, 0); /* dummy */
DELAY(2);
outb(com->cmd_port, 0); /* dummy */
DELAY(2);
outb(com->cmd_port, CMD8251_RESET); /* internal reset */
DELAY(2);
outb(com->cmd_port, mode ); /* mode register */
com->pc98_prev_siomod = mode;
DELAY(2);
pc98_i8251_set_cmd( com, (command|CMD8251_ER) );
DELAY(10);
if (com->pc98_8251fifo_enable)
outb(I8251F_fcr, FIFO_ENABLE | FIFO_XMT_RST | FIFO_RCV_RST);
}
static void
pc98_check_sysclock(void)
{
/* get system clock from port */
if ( pc98_machine_type & M_8M ) {
/* 8 MHz system & H98 */
sysclock = 8;
} else {
/* 5 MHz system */
sysclock = 5;
}
}
static void
com_cflag_and_speed_set( struct com_s *com, int cflag, int speed)
{
int cfcr=0;
int previnterrupt;
int tmp;
u_int count;
if (pc98_ttspeedtab(com, speed, &count) != 0)
return;
previnterrupt = pc98_check_i8251_interrupt(com);
pc98_disable_i8251_interrupt( com, IEN_Tx|IEN_TxEMP|IEN_Rx );
switch ( cflag&CSIZE ) {
case CS5:
cfcr = MOD8251_5BITS; break;
case CS6:
cfcr = MOD8251_6BITS; break;
case CS7:
cfcr = MOD8251_7BITS; break;
case CS8:
cfcr = MOD8251_8BITS; break;
}
if ( cflag&PARENB ) {
if ( cflag&PARODD )
cfcr |= MOD8251_PENAB;
else
cfcr |= MOD8251_PENAB | MOD8251_PEVEN;
}
if ( cflag&CSTOPB )
cfcr |= MOD8251_STOP2;
else
cfcr |= MOD8251_STOP1;
if ( count & 0x10000 )
cfcr |= MOD8251_CLKx1;
else
cfcr |= MOD8251_CLKx16;
while (!((tmp = inb(com->sts_port)) & STS8251_TxEMP))
;
/* set baud rate from ospeed */
pc98_set_baud_rate( com, count );
if ( cfcr != pc98_i8251_get_mod(com) )
pc98_i8251_reset(com, cfcr, pc98_i8251_get_cmd(com) );
pc98_enable_i8251_interrupt( com, previnterrupt );
}
static int
pc98_ttspeedtab(struct com_s *com, int speed, u_int *divisor)
{
int if_type, effect_sp, count = -1, mod;
if_type = com->pc98_if_type & 0x0f;
switch (com->pc98_if_type) {
case COM_IF_INTERNAL:
if (PC98SIO_baud_rate_port(if_type) != -1) {
count = ttspeedtab(speed, if_8251_type[if_type].speedtab);
if (count > 0) {
count |= COM1_EXT_CLOCK;
break;
}
}
/* for *1CLK asynchronous! mode, TEFUTEFU */
mod = (sysclock == 5) ? 2457600 : 1996800;
effect_sp = ttspeedtab( speed, pc98speedtab );
if ( effect_sp < 0 ) /* XXX */
effect_sp = ttspeedtab( (speed - 1), pc98speedtab );
if ( effect_sp <= 0 )
return effect_sp;
if ( effect_sp == speed )
mod /= 16;
if ( mod % effect_sp )
return(-1);
count = mod / effect_sp;
if ( count > 65535 )
return(-1);
if ( effect_sp != speed )
count |= 0x10000;
break;
case COM_IF_PC9861K_1:
case COM_IF_PC9861K_2:
count = 1;
break;
case COM_IF_IND_SS_1:
case COM_IF_IND_SS_2:
case COM_IF_PIO9032B_1:
case COM_IF_PIO9032B_2:
count = ttspeedtab( speed, if_8251_type[if_type].speedtab );
break;
case COM_IF_B98_01_1:
case COM_IF_B98_01_2:
count = ttspeedtab( speed, if_8251_type[if_type].speedtab );
#ifdef B98_01_OLD
if (count == 0 || count == 1) {
count += 4;
count |= 0x20000; /* x1 mode for 76800 and 153600 */
}
#endif
break;
}
if (count < 0)
return count;
*divisor = (u_int) count;
return 0;
}
static void
pc98_set_baud_rate( struct com_s *com, u_int count )
{
int if_type, io, s;
if_type = com->pc98_if_type & 0x0f;
io = rman_get_start(com->ioportres) & 0xff00;
switch (com->pc98_if_type) {
case COM_IF_INTERNAL:
if (PC98SIO_baud_rate_port(if_type) != -1) {
if (count & COM1_EXT_CLOCK) {
outb((Port_t)PC98SIO_baud_rate_port(if_type), count & 0xff);
break;
} else {
outb((Port_t)PC98SIO_baud_rate_port(if_type), 0x09);
}
}
if (count == 0)
return;
/* set i8253 */
s = splclock();
if (count != 3)
outb( 0x77, 0xb6 );
else
outb( 0x77, 0xb4 );
outb( 0x5f, 0);
outb( 0x75, count & 0xff );
outb( 0x5f, 0);
outb( 0x75, (count >> 8) & 0xff );
splx(s);
break;
case COM_IF_IND_SS_1:
case COM_IF_IND_SS_2:
outb(io | PC98SIO_intr_ctrl_port(if_type), 0);
outb(io | PC98SIO_baud_rate_port(if_type), 0);
outb(io | PC98SIO_baud_rate_port(if_type), 0xc0);
outb(io | PC98SIO_baud_rate_port(if_type), (count >> 8) | 0x80);
outb(io | PC98SIO_baud_rate_port(if_type), count & 0xff);
break;
case COM_IF_PIO9032B_1:
case COM_IF_PIO9032B_2:
outb(io | PC98SIO_baud_rate_port(if_type), count);
break;
case COM_IF_B98_01_1:
case COM_IF_B98_01_2:
outb(io | PC98SIO_baud_rate_port(if_type), count & 0x0f);
#ifdef B98_01_OLD
/*
* Some old B98_01 board should be controlled
* in different way, but this hasn't been tested yet.
*/
outb(io | PC98SIO_func_port(if_type),
(count & 0x20000) ? 0xf0 : 0xf2);
#endif
break;
}
}
static int
pc98_check_if_type(device_t dev, struct siodev *iod)
{
int irr, io, if_type, tmp;
static short irq_tab[2][8] = {
{ 3, 5, 6, 9, 10, 12, 13, -1},
{ 3, 10, 12, 13, 5, 6, 9, -1}
};
if_type = iod->if_type & 0x0f;
iod->irq = 0;
io = isa_get_port(dev) & 0xff00;
if (IS_8251(iod->if_type)) {
if (PC98SIO_func_port(if_type) != -1) {
outb(io | PC98SIO_func_port(if_type), 0xf2);
tmp = ttspeedtab(9600, if_8251_type[if_type].speedtab);
if (tmp != -1 && PC98SIO_baud_rate_port(if_type) != -1)
outb(io | PC98SIO_baud_rate_port(if_type), tmp);
}
iod->cmd = io | PC98SIO_cmd_port(if_type);
iod->sts = io | PC98SIO_sts_port(if_type);
iod->mod = io | PC98SIO_in_modem_port(if_type);
iod->ctrl = io | PC98SIO_intr_ctrl_port(if_type);
if (iod->if_type == COM_IF_INTERNAL) {
iod->irq = 4;
if (pc98_check_8251vfast()) {
PC98SIO_baud_rate_port(if_type) = I8251F_div;
if_8251_type[if_type].speedtab = pc98fast_speedtab;
}
} else {
tmp = inb( iod->mod ) & if_8251_type[if_type].irr_mask;
if ((isa_get_port(dev) & 0xff) == IO_COM2)
iod->irq = irq_tab[0][tmp];
else
iod->irq = irq_tab[1][tmp];
}
} else {
irr = if_16550a_type[if_type].irr_read;
#ifdef COM_MULTIPORT
if (!COM_ISMULTIPORT(device_get_flags(dev)) ||
device_get_unit(dev) == COM_MPMASTER(device_get_flags(dev)))
#endif
if (irr != -1) {
tmp = inb(io | irr);
if (isa_get_port(dev) & 0x01) /* XXX depend on RSB-384 */
iod->irq = irq_tab[1][tmp >> 3];
else
iod->irq = irq_tab[0][tmp & 0x07];
}
iod->cmd = 0;
iod->sts = 0;
iod->mod = 0;
iod->ctrl = 0;
}
if ( iod->irq == -1 ) return -1;
return 0;
}
static void
pc98_set_ioport(struct com_s *com)
{
int if_type = com->pc98_if_type & 0x0f;
Port_t io = rman_get_start(com->ioportres) & 0xff00;
pc98_check_sysclock();
com->data_port = io | PC98SIO_data_port(if_type);
com->cmd_port = io | PC98SIO_cmd_port(if_type);
com->sts_port = io | PC98SIO_sts_port(if_type);
com->in_modem_port = io | PC98SIO_in_modem_port(if_type);
com->intr_ctrl_port = io | PC98SIO_intr_ctrl_port(if_type);
}
static int
pc98_check_8251vfast(void)
{
int i;
outb(I8251F_div, 0x8c);
DELAY(10);
for (i = 0; i < 100; i++) {
if ((inb(I8251F_div) & 0x80) != 0) {
i = 0;
break;
}
DELAY(1);
}
outb(I8251F_div, 0);
DELAY(10);
for (; i < 100; i++) {
if ((inb(I8251F_div) & 0x80) == 0)
return 1;
DELAY(1);
}
return 0;
}
static int
pc98_check_8251fifo(void)
{
u_char tmp1, tmp2;
tmp1 = inb(I8251F_iir);
DELAY(10);
tmp2 = inb(I8251F_iir);
if (((tmp1 ^ tmp2) & 0x40) != 0 && ((tmp1 | tmp2) & 0x20) == 0)
return 1;
return 0;
}
#endif /* PC98 defined */
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