/* $NetBSD: scnreg.h,v 1.1 2009/02/10 06:04:56 rumble 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. * * scnreg.h: definitions for 2681/2692/68681 duart */ /* * register offsets */ /* per-channel regs (channel B's at SCN_REG(8-11)) */ #define CH_MR SCN_REG(0) /* rw mode register */ #define CH_SR SCN_REG(1) /* ro status register */ #define CH_CSR SCN_REG(1) /* wo clock select reg */ #define CH_CR SCN_REG(2) /* wo command reg */ #define CH_DAT SCN_REG(3) /* rw data reg */ /* duart-wide regs */ #define DU_IPCR SCN_REG(4) /* ro input port change reg */ #define DU_ACR SCN_REG(4) /* wo aux control reg */ #define DU_ISR SCN_REG(5) /* ro interrupt stat reg */ #define DU_IMR SCN_REG(5) /* wo interrupt mask reg */ #define DU_CTUR SCN_REG(6) /* rw counter timer upper reg */ #define DU_CTLR SCN_REG(7) /* rw counter timer lower reg */ /* SCN_REG(8-11) channel b (see above) */ /* SCN_REG(12): reserved */ #define DU_IP SCN_REG(13) /* ro input port */ #define DU_OPCR SCN_REG(13) /* wo output port cfg reg */ #define DU_CSTRT SCN_REG(14) /* ro start C/T cmd */ #define DU_OPSET SCN_REG(14) /* wo output port set */ #define DU_CSTOP SCN_REG(15) /* ro stop C/T cmd */ #define DU_OPCLR SCN_REG(15) /* wo output port reset */ /* * Data Values */ /* * MR (mode register) -- per channel */ /* MR0 (scn26c92 only) need to use CR_CMD_MR0 before access */ #define MR0_MODE 0x07 /* extended baud rate mode (MR0A only) */ #define MR0_TXINT 0x30 /* Tx int threshold */ #define MR0_RXINT 0x40 /* Rx int threshold (along with MR1_FFULL) */ #define MR0_RXWD 0x80 /* Rx watchdog (8 byte-times after last rx) */ #define MR0_MODE_0 0x00 /* Normal mode */ #define MR0_MODE_1 0x01 /* Extended mode 1 */ #define MR0_MODE_2 0x04 /* Extended mode 2 */ #define MR0_TXINT_EMPTY 0x00 /* TxInt when 8 FIFO bytes empty (default) */ #define MR0_TXINT_4 0x10 /* TxInt when 4 or more FIFO bytes empty */ #define MR0_TXINT_6 0x20 /* TxInt when 6 or more FIFO bytes empty */ #define MR0_TXINT_TXRDY 0x30 /* TxInt when 1 or more FIFO bytes empty */ /* MR1 (need to use CR_CMD_MR1 before each access) */ #define MR1_CS5 0x00 #define MR1_CS6 0x01 #define MR1_CS7 0x02 #define MR1_CS8 0x03 #define MR1_PEVEN 0x00 #define MR1_PODD 0x04 #define MR1_PNONE 0x10 #define MR1_RXBLK 0x20 /* "block" error mode */ #define MR1_FFULL 0x40 /* wait until FIFO full for rxint (cf MR0) */ #define MR1_RXRTS 0x80 /* auto RTS input flow ctrl */ /* MR2 (any access to MR after MR1) */ #define MR2_STOP 0x0f /* mask for stop bits */ #define MR2_STOP1 0x07 #define MR2_STOP2 0x0f #define MR2_TXCTS 0x10 /* transmitter follows CTS */ #define MR2_TXRTS 0x20 /* RTS follows transmitter */ #define MR2_MODE 0xc0 /* mode mask */ /* * IP (input port) */ #define IP_IP0 0x01 #define IP_IP1 0x02 #define IP_IP2 0x04 #define IP_IP3 0x08 #define IP_IP4 0x10 #define IP_IP5 0x20 #define IP_IP6 0x40 /* D7 is always 1 */ /* * ACR (Aux Control Register) */ #define ACR_DELTA_IP0 0x01 /* enable IP0 delta interrupt */ #define ACR_DELTA_IP1 0x02 /* enable IP1 delta interrupt */ #define ACR_DELTA_IP2 0x04 /* enable IP2 delta interrupt */ #define ACR_DELTA_IP3 0x08 /* enable IP3 delta interrupt */ #define ACR_CT 0x70 /* counter/timer mode (ACT_CT_xxx) */ #define ACR_BRG 0x80 /* baud rate generator speed set */ /* counter/timer mode */ #define ACR_CT_CEXT 0x00 /* counter: external (IP2) */ #define ACR_CT_CTXA 0x10 /* counter: TxCA x 1 */ #define ACR_CT_CTXB 0x20 /* counter: TxCB x 1 */ #define ACR_CT_CCLK 0x30 /* counter: X1/CLK div 16 */ #define ACR_CT_TEXT1 0x40 /* timer: external (IP2) */ #define ACR_CT_TEXT16 0x50 /* timer: external (IP2) div 16 */ #define ACR_CT_TCLK1 0x60 /* timer: X1/CLK */ #define ACR_CT_TCLK16 0x70 /* timer: X1/CLK div 16 */ /* * IPCR (Input Port Change Register) -- per channel */ #define IPCR_IP0 0x01 #define IPCR_IP1 0x02 #define IPCR_IP2 0x04 #define IPCR_IP3 0x08 #define IPCR_DELTA_IP0 0x10 #define IPCR_DELTA_IP1 0x20 #define IPCR_DELTA_IP2 0x40 #define IPCR_DELTA_IP3 0x80 /* * output port config register * if bit(s) clear OP line follows OP register OPn bit */ #define OPCR_OP7_TXRDYB 0x80 /* OP7: TxRDYB */ #define OPCR_OP6_TXRDYA 0x40 /* OP6: TxRDYA */ #define OPCR_OP5_RXRDYB 0x20 /* OP5: ch B RxRDY/FFULL */ #define OPCR_OP4_RXRDYA 0x10 /* OP4: ch A RxRDY/FFULL */ #define OPCR_OP3 0xC0 /* OP3: mask */ #define OPCR_OP2 0x03 /* OP2: mask */ /* * output port */ #define OP_OP0 0x01 #define OP_OP1 0x02 #define OP_OP2 0x04 #define OP_OP3 0x08 #define OP_OP4 0x10 #define OP_OP5 0x20 #define OP_OP6 0x40 #define OP_OP7 0x80 /* * CR (command register) -- per channel */ /* bits (may be or'ed together, with a command) */ #define CR_ENA_RX 0x01 #define CR_DIS_RX 0x02 #define CR_ENA_TX 0x04 #define CR_DIS_TX 0x08 /* commands */ #define CR_CMD_NOP 0x00 #define CR_CMD_MR1 0x10 #define CR_CMD_RESET_RX 0x20 #define CR_CMD_RESET_TX 0x30 #define CR_CMD_RESET_ERR 0x40 #define CR_CMD_RESET_BRK 0x50 #define CR_CMD_START_BRK 0x60 #define CR_CMD_STOP_BRK 0x70 /* 2692-only commands */ #define CR_CMD_RTS_ON 0x80 /* raise RTS */ #define CR_CMD_RTS_OFF 0x90 /* lower RTS */ #define CR_CMD_TIM_ON 0xa0 /* enable timeout mode */ #define CR_CMD_TIM_OFF 0xc0 /* reset timeout mode */ #define CR_CMD_PDN_ON 0xe0 /* power down mode on */ #define CR_CMD_PDN_RUN 0xf0 /* power down mode off (normal run) */ /* 26C92-only commands */ #define CR_CMD_MR0 0xb0 /* MR0 select */ /* * SR (status register) -- per channel */ #define SR_RX_RDY 0x01 #define SR_RX_FFULL 0x02 /* rx fifo full */ #define SR_TX_RDY 0x04 /* tx room for more */ #define SR_TX_EMPTY 0x08 /* tx dry */ #define SR_OVERRUN 0x10 /* bits cleared by reset error (see MR1 error mode bit) */ #define SR_PARITY 0x20 /* received parity error */ #define SR_FRAME 0x40 /* received framing error */ #define SR_BREAK 0x80 /* received break */ /* * Interrupt Mask Register (IMR) and ISR (Interrupt Status Register) */ #define INT_TXA 0x01 /* Tx Ready A */ #define INT_RXA 0x02 /* Rx Ready/FIFO Full A */ #define INT_BRKA 0x04 /* Delta Break A */ #define INT_CTR 0x08 /* counter ready */ #define INT_TXB 0x10 /* Tx Ready B */ #define INT_RXB 0x20 /* Rx Ready/FIFO Full B */ #define INT_BRKB 0x40 /* Delta Break B */ #define INT_IP 0x80 /* input port change */