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freebsd-nq/sys/pc98/cbus/sio.c
Andriy Gapon 9976156f12 kern cons: introduce infrastructure for console grabbing by kernel 
At the moment grab and ungrab methods of all console drivers are no-ops.

Current intended meaning of the calls is that the kernel takes control of
console input.  In the future the semantics may be extended to mean that
the calling thread takes full ownership of the console (e.g. console
output from other threads could be suspended).

Inspired by:	bde
MFC after:	2 months
2011-12-17 15:08:43 +00:00

4388 lines
111 KiB
C
Raw Blame History

/*-
* 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_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 KDB
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)
/*
* 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)
/*
* 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)
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
if (com->unit == comconsole &&
(kdb_brk = kdb_alt_break(recv_data,
&com->alt_brk_state)) != 0) {
goto again;
}
#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)
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;
static cn_grab_t sio_cngrab;
static cn_ungrab_t sio_cnungrab;
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 void
sio_cngrab(struct consdev *cp)
{
}
static void
sio_cnungrab(struct consdev *cp)
{
}
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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