c6d2740564
* Uses Counter/Timer dynamicly for rate generation; You can have both 19200 and 38400 on one duart, and 57600 on another! * Improved scninfo program to dump driver internal information. implemented counters for parity err, framing err, break * Delays changes until transmitter idle to avoid "glitches" * Cleaned up scn_softc member names * Untested support for sc26c92 (I don't yet have any to test with); + Will use alternate rate tables (include 115.2kbps and 230.4kbps) + Will raise FIFO rx interrupt threshold and watchdog timer at higher rates. + Unknown (to me) how fast pc532 MC145406 driver chips can go NOTE: It seems like it may be a BAD idea to use a sc26c92 as a console port for now; the PROM doesn't know to reset the chip back to scn2692 mode!!
170 lines
5.9 KiB
C
170 lines
5.9 KiB
C
/* $NetBSD: scnvar.h,v 1.3 1997/03/13 10:24:16 matthias Exp $ */
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/*
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* Copyright (c) 1996, 1997 Philip L. Budne.
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* Copyright (c) 1993 Philip A. Nelson.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Philip A. Nelson.
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* 4. The name of Philip A. Nelson may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY PHILIP NELSON ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL PHILIP NELSON BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* scnvar.h: definitions for pc532 2681/2692/26c96 duart driver
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*/
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/* Constants. */
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#ifdef COMDEF_SPEED
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#undef TTYDEF_SPEED
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#define TTYDEF_SPEED COMDEF_SPEED /* default baud rate */
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#endif
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#define SCN_FIRST_ADR 0x28000000 /* address of first RS232 port */
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#define SCN_FIRST_MAP_ADR 0xFFC80000 /* mapped address of first port */
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#define SCN_SIZE 0x8 /* address space for port */
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#define SCN_CONSOLE 0 /* minor number of console */
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#define SCN_CON_MAP_STAT 0xFFC80001 /* raw addresses for console */
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#define SCN_CON_MAP_DATA 0xFFC80003 /* Mapped .... */
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#define SCN_CON_MAP_ISR 0xFFC80005
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#define SCN_CON_STAT 0x28000001 /* raw addresses for console */
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#define SCN_CON_DATA 0x28000003 /* Unmapped .... */
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#define SCN_CON_ISR 0x28000005
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/* output port bits */
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#define OP_RTSA OP_OP0
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#define OP_RTSB OP_OP1
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#define OP_DTRA OP_OP2
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#define OP_DTRB OP_OP3
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/* OP4-7 not connected */
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/* input port bits */
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#define IP_CTSA IP_IP0
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#define IP_CTSB IP_IP1
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#define IP_DCDB IP_IP2
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#define IP_DCDA IP_IP3
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/* IP4-6 not connected */
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#define ACR_DELTA_CTSA ACR_DELTA_IP0
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#define ACR_DELTA_CTSB ACR_DELTA_IP1
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#define ACR_DELTA_DCDB ACR_DELTA_IP2
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#define ACR_DELTA_DCDA ACR_DELTA_IP3
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#define IPCR_CTSA IPCR_IP0
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#define IPCR_CTSB IPCR_IP1
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#define IPCR_DCDB IPCR_IP2
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#define IPCR_DCDA IPCR_IP3
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#define IPCR_DELTA_CTSA IPCR_DELTA_IP0
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#define IPCR_DELTA_CTSB IPCR_DELTA_IP1
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#define IPCR_DELTA_DCDB IPCR_DELTA_IP2
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#define IPCR_DELTA_DCDA IPCR_DELTA_IP3
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#define SCN_OP_BIS(SC,VAL) ((SC)->sc_duart->base[DU_OPSET] = (VAL))
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#define SCN_OP_BIC(SC,VAL) ((SC)->sc_duart->base[DU_OPCLR] = (VAL))
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#define SCN_DCD(SC) (((SC)->sc_duart->base[DU_IP] & (SC)->sc_ip_dcd) == 0)
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/* pc532 duarts are auto-sized to byte-wide */
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#define CH_SZ 8
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#define DUART_SZ 16
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#define SCN_REG(n) (n) /* n'th reg at n'th byte!! */
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/* The DUART description struct; for data common to both channels */
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struct duart {
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volatile u_char *base;
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struct chan {
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int32_t ispeed, ospeed;
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u_char icode, ocode;
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u_char mr0; /* MR0[7:3] */
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u_char new_mr1; /* held changes */
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u_char new_mr2; /* held changes */
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} chan[2];
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enum scntype { SCNUNK, SCN2681, SCN2692, SC26C92 } type;
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u_int16_t counter; /* C/T generated bps, or zero */
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u_int16_t ocounter; /* last C/T generated bps, or zero */
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u_char mode; /* ACR[7] + MR0[2:0] */
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u_char acr; /* ACR[6:0]*/
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u_char imr; /* IMR bits */
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u_char opcr; /* OPCR bits */
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};
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#define SCN_RING_BITS 9 /* 512 byte buffers */
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#define SCN_RING_SIZE (1<<SCN_RING_BITS) /* must be a power of two */
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#define SCN_RING_MASK (SCN_RING_SIZE-1)
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#define SCN_RING_THRESH (SCN_RING_SIZE/2)
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#define SCN_RING_HIWAT (SCN_RING_SIZE - (SCN_RING_SIZE >> 2))
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/* scn channel state */
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struct scn_softc {
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struct device sc_dev;
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struct tty *sc_tty;
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int sc_unit; /* unit number of this line (base 0) */
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struct duart *sc_duart; /* pointer to duart struct */
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volatile u_char *sc_chbase; /* per-channel registers (CH_xxx) */
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u_char sc_swflags; /* from config / TIOCxFLAGS */
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#define SCN_SW_SOFTCAR 0x01
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#define SCN_SW_CLOCAL 0x02
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#define SCN_SW_CRTSCTS 0x04
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#define SCN_SW_MDMBUF 0x08 /* not implemented */
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/* I wish there was a TS_DIALOUT flag! */
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u_char sc_dialout; /* set if open for dialout */
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#define SCN_DIALOUT(SCN) ((SCN)->sc_dialout)
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#define SCN_SETDIALOUT(SCN) (SCN)->sc_dialout = 1
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#define SCN_CLRDIALOUT(SCN) (SCN)->sc_dialout = 0
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u_char sc_heldchanges; /* waiting for output done */
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/* bits in input port register */
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u_char sc_ip_dcd;
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u_char sc_ip_cts;
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/* bits in output port registers */
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u_char sc_op_rts;
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u_char sc_op_dtr;
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/* interrupt mask bits */
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u_char sc_tx_int;
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/* counters */
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u_long sc_framing_errors;
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u_long sc_parity_errors;
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u_long sc_fifo_overruns;
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u_long sc_breaks;
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/* ring buffer for rxrdy interrupt */
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u_int sc_rbget; /* ring buffer `get' index */
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volatile u_int sc_rbput; /* ring buffer `put' index */
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int sc_rbhiwat;
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short sc_rbuf[SCN_RING_SIZE]; /* status + data */
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long sc_fotime; /* last fifo overrun message */
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long sc_rotime; /* last ring overrun message */
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u_long sc_ring_overruns; /* number of ring buffer overruns */
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/* Flags to communicate with scntty_softint() */
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volatile char sc_rx_blocked; /* input block at ring */
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};
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