/* $NetBSD: scnvar.h,v 1.2 2012/10/27 17:18:09 chs Exp $ */ /* * Copyright (c) 1996, 1997 Philip L. Budne. * Copyright (c) 1993 Philip A. Nelson. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Philip A. Nelson. * 4. The name of Philip A. Nelson may not be used to endorse or promote * products derived from this software without specific prior written * permission. * * THIS SOFTWARE IS PROVIDED BY PHILIP NELSON ``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 PHILIP NELSON 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. * * scnvar.h: definitions for pc532 2681/2692/26c96 duart driver */ /* Constants. */ #ifdef COMDEF_SPEED #undef TTYDEF_SPEED #define TTYDEF_SPEED COMDEF_SPEED /* default baud rate */ #endif #define SCN_SIZE 0x8 /* address space for port */ #define SCN_CONSOLE 0 /* minor number of console */ #define SCN_CONSDUART 0 #define SCN_CONSCHAN 0 /* output port bits */ #define OP_RTSA OP_OP0 #define OP_RTSB OP_OP1 #define OP_DTRA OP_OP2 #define OP_DTRB OP_OP3 /* OP4-7 not connected */ /* input port bits */ #define IP_CTSA IP_IP0 #define IP_CTSB IP_IP1 #define IP_DCDB IP_IP2 #define IP_DCDA IP_IP3 /* IP4-6 not connected */ #define ACR_DELTA_CTSA ACR_DELTA_IP0 #define ACR_DELTA_CTSB ACR_DELTA_IP1 #define ACR_DELTA_DCDB ACR_DELTA_IP2 #define ACR_DELTA_DCDA ACR_DELTA_IP3 #define IPCR_CTSA IPCR_IP0 #define IPCR_CTSB IPCR_IP1 #define IPCR_DCDB IPCR_IP2 #define IPCR_DCDA IPCR_IP3 #define IPCR_DELTA_CTSA IPCR_DELTA_IP0 #define IPCR_DELTA_CTSB IPCR_DELTA_IP1 #define IPCR_DELTA_DCDB IPCR_DELTA_IP2 #define IPCR_DELTA_DCDA IPCR_DELTA_IP3 #define SCN_OP_BIS(SC,VAL) ((SC)->sc_duart->base[DU_OPSET] = (VAL)) #define SCN_OP_BIC(SC,VAL) ((SC)->sc_duart->base[DU_OPCLR] = (VAL)) #define SCN_DCD(SC) (((SC)->sc_duart->base[DU_IP] & (SC)->sc_ip_dcd) == 0) /* pc532 duarts are auto-sized to byte-wide */ #define CH_SZ 8 #define DUART_SZ 16 #define SCN_REG(n) (n << 4) /* 15 byte pad after each reg */ /* The DUART description struct; for data common to both channels */ struct duart { volatile u_char *base; struct chan { struct scn_softc *sc; struct tty *tty; int32_t ispeed, ospeed; u_char icode, ocode; u_char mr0; /* MR0[7:3] */ u_char new_mr1; /* held changes */ u_char new_mr2; /* held changes */ } chan[2]; enum scntype { SCNUNK, SCN2681, SCN2692, SC26C92 } type; uint16_t counter; /* C/T generated bps, or zero */ uint16_t ocounter; /* last C/T generated bps, or zero */ u_char mode; /* ACR[7] + MR0[2:0] */ u_char acr; /* ACR[6:0]*/ u_char imr; /* IMR bits */ u_char opcr; /* OPCR bits */ }; #define SCN_RING_BITS 9 /* 512 byte buffers */ #define SCN_RING_SIZE (1<<SCN_RING_BITS) /* must be a power of two */ #define SCN_RING_MASK (SCN_RING_SIZE-1) #define SCN_RING_THRESH (SCN_RING_SIZE/2) #define SCN_RING_HIWAT (SCN_RING_SIZE - (SCN_RING_SIZE >> 2)) /* scn channel state */ struct scn_softc { struct tty *sc_tty; int sc_unit; /* unit number of this line (base 0) */ int sc_channel; int sc_isconsole; int sc_iskgdb; struct duart *sc_duart; /* pointer to duart struct */ volatile u_char *sc_chbase; /* per-channel registers (CH_xxx) */ u_char sc_swflags; /* from config / TIOCxFLAGS */ #define SCN_SW_SOFTCAR 0x01 #define SCN_SW_CLOCAL 0x02 #define SCN_SW_CRTSCTS 0x04 #define SCN_SW_MDMBUF 0x08 /* not implemented */ /* I wish there was a TS_DIALOUT flag! */ u_char sc_dialout; /* set if open for dialout */ #define SCN_DIALOUT(SCN) ((SCN)->sc_dialout) #define SCN_SETDIALOUT(SCN) (SCN)->sc_dialout = 1 #define SCN_CLRDIALOUT(SCN) (SCN)->sc_dialout = 0 u_char sc_heldchanges; /* waiting for output done */ /* bits in input port register */ u_char sc_ip_dcd; u_char sc_ip_cts; /* bits in output port registers */ u_char sc_op_rts; u_char sc_op_dtr; /* interrupt mask bits */ u_char sc_tx_int; u_char sc_rx_int; /* counters */ u_long sc_framing_errors; u_long sc_parity_errors; u_long sc_fifo_overruns; u_long sc_breaks; /* ring buffer for rxrdy interrupt */ u_int sc_rbget; /* ring buffer `get' index */ volatile u_int sc_rbput; /* ring buffer `put' index */ int sc_rbhiwat; short sc_rbuf[SCN_RING_SIZE]; /* status + data */ long sc_fotime; /* last fifo overrun message */ long sc_rotime; /* last ring overrun message */ u_long sc_ring_overruns; /* number of ring buffer overruns */ /* Flags to communicate with scntty_softint() */ volatile char sc_rx_blocked; /* input block at ring */ };
