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NetBSD/sys/arch/mac68k/dev/scc_8530.h
briggs 8ae7f8bceb The current MacBSD architecture sub-directory for NetBSD-0.9--more or 
less.  It needs some help to get to be -current.  Support for minimal
hardware on the SE/30, II, IIx, and IIcx exists.
1993-09-29 06:08:37 +00:00

382 lines
12 KiB
C
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/*
* Mach Operating System
* Copyright (c) 1991,1990,1989 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* HISTORY
* $Log: scc_8530.h,v $
* Revision 1.1.1.1 1993/09/29 06:09:28 briggs
* The current MacBSD architecture sub-directory for NetBSD-0.9--more or
* less. It needs some help to get to be -current. Support for minimal
* hardware on the SE/30, II, IIx, and IIcx exists.
*
* Revision 2.4 93/02/05 08:06:56 danner
* Generalized register access, to accomodate Alpha.
* [93/02/04 01:27:21 af]
*
* Revision 2.3 92/02/19 16:46:06 elf
* Revised, based on Intel documentation for the 82530:
* "Microcommunications Handbook", Vol 1-2, 1990.
* [92/01/22 af]
*
* Revision 2.2 91/08/24 11:52:49 af
* Created, from the Zilog specs:
* "Z8530 SCC Serial Communications Controller, Product Specification"
* in the "1983/84 Components Data Book" pp 409-429, September 1983
* Zilog, Campbell, CA 95008
* [91/06/21 af]
*
*/
/*
* File: scc_8530.h
* Author: Alessandro Forin, Carnegie Mellon University
* Date: 6/91
*
* Definitions for the Zilog Z8530 SCC serial line chip
*/
#ident "$Id: scc_8530.h,v 1.1.1.1 1993/09/29 06:09:28 briggs Exp $"
#ifndef _SCC_8530_H_
#define _SCC_8530_H_
/*
* Register map, needs definition of the alignment
* used on the specific machine.
* #define the 'scc_register_t' data type before
* including this header file. For restrictions on
* access modes define the set/get_datum macros.
* We provide defaults ifnot.
*/
#ifndef scc_register_t
typedef struct scc_register {
volatile unsigned char datum;
} scc_register_t;
#endif
#define SCC_CHANNEL_A 1
#define SCC_CHANNEL_B 0
typedef struct {
/* Channel B is first, then A */
struct {
scc_register_t scc_command; /* reg select */
scc_register_t scc_data; /* Rx/Tx buffer */
} scc_channel[2];
} scc_regmap_t;
#ifndef scc_set_datum(d,v)
#define scc_set_datum(d,v) (d) = (v)
#define scc_get_datum(d,v) (v) = (d)
#endif
#define scc_init_reg(scc,chan) { \
char tmp; \
scc_get_datum((scc)->scc_channel[(chan)].scc_command.datum,tmp); \
scc_get_datum((scc)->scc_channel[(chan)].scc_command.datum,tmp); \
}
#define scc_read_reg(scc,chan,reg,val) { \
scc_set_datum((scc)->scc_channel[(chan)].scc_command.datum,reg); \
scc_get_datum((scc)->scc_channel[(chan)].scc_command.datum,val); \
}
#define scc_read_reg_zero(scc,chan,val) { \
scc_get_datum((scc)->scc_channel[(chan)].scc_command.datum,val); \
}
#define scc_write_reg(scc,chan,reg,val) { \
scc_set_datum((scc)->scc_channel[(chan)].scc_command.datum,reg); \
scc_set_datum((scc)->scc_channel[(chan)].scc_command.datum,val); \
}
#define scc_write_reg_zero(scc,chan,val) { \
scc_set_datum((scc)->scc_channel[(chan)].scc_command.datum,val); \
}
#define scc_read_data(scc,chan,val) { \
scc_get_datum((scc)->scc_channel[(chan)].scc_data.datum,val); \
}
#define scc_write_data(scc,chan,val) { \
scc_set_datum((scc)->scc_channel[(chan)].scc_data.datum,val); \
}
/*
* Addressable registers
*/
#define SCC_RR0 0 /* status register */
#define SCC_RR1 1 /* special receive conditions */
#define SCC_RR2 2 /* (modified) interrupt vector */
#define SCC_RR3 3 /* interrupts pending (cha A only) */
#define SCC_RR8 8 /* recv buffer (alias for data) */
#define SCC_RR10 10 /* sdlc status */
#define SCC_RR12 12 /* BRG constant, low part */
#define SCC_RR13 13 /* BRG constant, high part */
#define SCC_RR15 15 /* interrupts currently enabled */
#define SCC_WR0 0 /* reg select, and commands */
#define SCC_WR1 1 /* interrupt and DMA enables */
#define SCC_WR2 2 /* interrupt vector */
#define SCC_WR3 3 /* receiver params and enables */
#define SCC_WR4 4 /* clock/char/parity params */
#define SCC_WR5 5 /* xmit params and enables */
#define SCC_WR6 6 /* synchr SYNCH/address */
#define SCC_WR7 7 /* synchr SYNCH/flag */
#define SCC_WR8 8 /* xmit buffer (alias for data) */
#define SCC_WR9 9 /* vectoring and resets */
#define SCC_WR10 10 /* synchr params */
#define SCC_WR11 11 /* clocking definitions */
#define SCC_WR12 12 /* BRG constant, low part */
#define SCC_WR13 13 /* BRG constant, high part */
#define SCC_WR14 14 /* BRG enables and commands */
#define SCC_WR15 15 /* interrupt enables */
/*
* Read registers defines
*/
#define SCC_RR0_BREAK 0x80 /* break detected (rings twice), or */
#define SCC_RR0_ABORT 0x80 /* abort (synchr) */
#define SCC_RR0_TX_UNDERRUN 0x40 /* xmit buffer empty/end of message */
#define SCC_RR0_CTS 0x20 /* clear-to-send pin active (sampled
only on intr and after RESI cmd */
#define SCC_RR0_SYNCH 0x10 /* SYNCH found/still hunting */
#define SCC_RR0_DCD 0x08 /* carrier-detect (same as CTS) */
#define SCC_RR0_TX_EMPTY 0x04 /* xmit buffer empty */
#define SCC_RR0_ZERO_COUNT 0x02 /* ? */
#define SCC_RR0_RX_AVAIL 0x01 /* recv fifo not empty */
#define SCC_RR1_EOF 0x80 /* end-of-frame, SDLC mode */
#define SCC_RR1_CRC_ERR 0x40 /* incorrect CRC or.. */
#define SCC_RR1_FRAME_ERR 0x40 /* ..bad frame */
#define SCC_RR1_RX_OVERRUN 0x20 /* rcv fifo overflow */
#define SCC_RR1_PARITY_ERR 0x10 /* incorrect parity in data */
#define SCC_RR1_RESIDUE0 0x08
#define SCC_RR1_RESIDUE1 0x04
#define SCC_RR1_RESIDUE2 0x02
#define SCC_RR1_ALL_SENT 0x01
/* RR2 contains the interrupt vector unmodified (channel A) or
modified as follows (channel B, if vector-include-status) */
#define SCC_RR2_STATUS(val) ((val)&0xf)
#define SCC_RR2_B_XMIT_DONE 0x0
#define SCC_RR2_B_EXT_STATUS 0x2
#define SCC_RR2_B_RECV_DONE 0x4
#define SCC_RR2_B_RECV_SPECIAL 0x6
#define SCC_RR2_A_XMIT_DONE 0x8
#define SCC_RR2_A_EXT_STATUS 0xa
#define SCC_RR2_A_RECV_DONE 0xc
#define SCC_RR2_A_RECV_SPECIAL 0xe
/* Interrupts pending, to be read from channel A only (B raz) */
#define SCC_RR3_zero 0xc0
#define SCC_RR3_RX_IP_A 0x20
#define SCC_RR3_TX_IP_A 0x10
#define SCC_RR3_EXT_IP_A 0x08
#define SCC_RR3_RX_IP_B 0x04
#define SCC_RR3_TX_IP_B 0x02
#define SCC_RR3_EXT_IP_B 0x01
/* RR8 is the receive data buffer, a 3 deep FIFO */
#define SCC_RECV_BUFFER SCC_RR8
#define SCC_RECV_FIFO_DEEP 3
#define SCC_RR10_1CLKS 0x80
#define SCC_RR10_2CLKS 0x40
#define SCC_RR10_zero 0x2d
#define SCC_RR10_LOOP_SND 0x10
#define SCC_RR10_ON_LOOP 0x02
/* RR12/RR13 hold the timing base, upper byte in RR13 */
#define scc_get_timing_base(scc,chan,val) { \
register char tmp; \
scc_read_reg(scc,chan,SCC_RR12,val);\
scc_read_reg(scc,chan,SCC_RR13,tmp);\
(val) = ((val)<<8)|(tmp&0xff);\
}
#define SCC_RR15_BREAK_IE 0x80
#define SCC_RR15_TX_UNDERRUN_IE 0x40
#define SCC_RR15_CTS_IE 0x20
#define SCC_RR15_SYNCH_IE 0x10
#define SCC_RR15_DCD_IE 0x08
#define SCC_RR15_zero 0x05
#define SCC_RR15_ZERO_COUNT_IE 0x02
/*
* Write registers defines
*/
/* WR0 is used for commands too */
#define SCC_RESET_TXURUN_LATCH 0xc0
#define SCC_RESET_TX_CRC 0x80
#define SCC_RESET_RX_CRC 0x40
#define SCC_RESET_HIGHEST_IUS 0x38 /* channel A only */
#define SCC_RESET_ERROR 0x30
#define SCC_RESET_TX_IP 0x28
#define SCC_IE_NEXT_CHAR 0x20
#define SCC_SEND_SDLC_ABORT 0x18
#define SCC_RESET_EXT_IP 0x10
#define SCC_WR1_DMA_ENABLE 0x80 /* dma control */
#define SCC_WR1_DMA_MODE 0x40 /* drive ~req for DMA controller */
#define SCC_WR1_DMA_RECV_DATA 0x20 /* from wire to host memory */
/* interrupt enable/conditions */
#define SCC_WR1_RXI_SPECIAL_O 0x18 /* on special only */
#define SCC_WR1_RXI_ALL_CHAR 0x10 /* on each char, or special */
#define SCC_WR1_RXI_FIRST_CHAR 0x08 /* on first char, or special */
#define SCC_WR1_RXI_DISABLE 0x00 /* never on recv */
#define SCC_WR1_PARITY_IE 0x04 /* on parity errors */
#define SCC_WR1_TX_IE 0x02
#define SCC_WR1_EXT_IE 0x01
/* WR2 is common and contains the interrupt vector (high nibble) */
#define SCC_WR3_RX_8_BITS 0xc0
#define SCC_WR3_RX_6_BITS 0x80
#define SCC_WR3_RX_7_BITS 0x40
#define SCC_WR3_RX_5_BITS 0x00
#define SCC_WR3_AUTO_ENABLE 0x20
#define SCC_WR3_HUNT_MODE 0x10
#define SCC_WR3_RX_CRC_ENABLE 0x08
#define SCC_WR3_SDLC_SRCH 0x04
#define SCC_WR3_INHIBIT_SYNCH 0x02
#define SCC_WR3_RX_ENABLE 0x01
/* Should be re-written after reset */
#define SCC_WR4_CLK_x64 0xc0 /* clock divide factor */
#define SCC_WR4_CLK_x32 0x80
#define SCC_WR4_CLK_x16 0x40
#define SCC_WR4_CLK_x1 0x00
#define SCC_WR4_EXT_SYNCH_MODE 0x30 /* synch modes */
#define SCC_WR4_SDLC_MODE 0x20
#define SCC_WR4_16BIT_SYNCH 0x10
#define SCC_WR4_8BIT_SYNCH 0x00
#define SCC_WR4_2_STOP 0x0c /* asynch modes */
#define SCC_WR4_1_5_STOP 0x08
#define SCC_WR4_1_STOP 0x04
#define SCC_WR4_SYNCH_MODE 0x00
#define SCC_WR4_EVEN_PARITY 0x02
#define SCC_WR4_PARITY_ENABLE 0x01
#define SCC_WR5_DTR 0x80 /* drive DTR pin */
#define SCC_WR5_TX_8_BITS 0x60
#define SCC_WR5_TX_6_BITS 0x40
#define SCC_WR5_TX_7_BITS 0x20
#define SCC_WR5_TX_5_BITS 0x00
#define SCC_WR5_SEND_BREAK 0x10
#define SCC_WR5_TX_ENABLE 0x08
#define SCC_WR5_CRC_16 0x04 /* CRC if non zero, .. */
#define SCC_WR5_SDLC 0x00 /* ..SDLC otherwise */
#define SCC_WR5_RTS 0x02 /* drive RTS pin */
#define SCC_WR5_TX_CRC_ENABLE 0x01
/* Registers WR6 and WR7 are for synch modes data, with among other things: */
#define SCC_WR6_BISYNCH_12 0x0f
#define SCC_WR6_SDLC_RANGE_MASK 0x0f
#define SCC_WR7_SDLC_FLAG 0x7e
/* WR8 is the transmit data buffer (no FIFO) */
#define SCC_XMT_BUFFER SCC_WR8
#define SCC_WR9_HW_RESET 0xc0 /* force hardware reset */
#define SCC_WR9_RESET_CHA_A 0x80
#define SCC_WR9_RESET_CHA_B 0x40
#define SCC_WR9_NON_VECTORED 0x20 /* mbz for Zilog chip */
#define SCC_WR9_STATUS_HIGH 0x10
#define SCC_WR9_MASTER_IE 0x08
#define SCC_WR9_DLC 0x04 /* disable-lower-chain */
#define SCC_WR9_NV 0x02 /* no vector */
#define SCC_WR9_VIS 0x01 /* vector-includes-status */
#define SCC_WR10_CRC_PRESET 0x80
#define SCC_WR10_FM0 0x60
#define SCC_WR10_FM1 0x40
#define SCC_WR10_NRZI 0x20
#define SCC_WR10_NRZ 0x00
#define SCC_WR10_ACTIVE_ON_POLL 0x10
#define SCC_WR10_MARK_IDLE 0x08 /* flag if zero */
#define SCC_WR10_ABORT_ON_URUN 0x04 /* flag if zero */
#define SCC_WR10_LOOP_MODE 0x02
#define SCC_WR10_6BIT_SYNCH 0x01
#define SCC_WR10_8BIT_SYNCH 0x00
#define SCC_WR11_RTxC_XTAL 0x80 /* RTxC pin is input (ext oscill) */
#define SCC_WR11_RCLK_DPLL 0x60 /* clock received data on dpll */
#define SCC_WR11_RCLK_BAUDR 0x40 /* .. on BRG */
#define SCC_WR11_RCLK_TRc_PIN 0x20 /* .. on TRxC pin */
#define SCC_WR11_RCLK_RTc_PIN 0x00 /* .. on RTxC pin */
#define SCC_WR11_XTLK_DPLL 0x18
#define SCC_WR11_XTLK_BAUDR 0x10
#define SCC_WR11_XTLK_TRc_PIN 0x08
#define SCC_WR11_XTLK_RTc_PIN 0x00
#define SCC_WR11_TRc_OUT 0x04 /* drive TRxC pin as output from..*/
#define SCC_WR11_TRcOUT_DPLL 0x03 /* .. the dpll */
#define SCC_WR11_TRcOUT_BAUDR 0x02 /* .. the BRG */
#define SCC_WR11_TRcOUT_XMTCLK 0x01 /* .. the xmit clock */
#define SCC_WR11_TRcOUT_XTAL 0x00 /* .. the external oscillator */
/* WR12/WR13 are for timing base preset */
#define scc_set_timing_base(scc,chan,val) { \
scc_write_reg(scc,chan,SCC_RR12,val);\
scc_write_reg(scc,chan,SCC_RR13,(val)>>8);\
}
/* More commands in this register */
#define SCC_WR14_NRZI_MODE 0xe0 /* synch modulations */
#define SCC_WR14_FM_MODE 0xc0
#define SCC_WR14_RTc_SOURCE 0xa0 /* clock is from pin .. */
#define SCC_WR14_BAUDR_SOURCE 0x80 /* .. or internal BRG */
#define SCC_WR14_DISABLE_DPLL 0x60
#define SCC_WR14_RESET_CLKMISS 0x40
#define SCC_WR14_SEARCH_MODE 0x20
/* ..and more bitsy */
#define SCC_WR14_LOCAL_LOOPB 0x10
#define SCC_WR14_AUTO_ECHO 0x08
#define SCC_WR14_DTR_REQUEST 0x04
#define SCC_WR14_BAUDR_SRC 0x02
#define SCC_WR14_BAUDR_ENABLE 0x01
#define SCC_WR15_BREAK_IE 0x80
#define SCC_WR15_TX_UNDERRUN_IE 0x40
#define SCC_WR15_CTS_IE 0x20
#define SCC_WR15_SYNCHUNT_IE 0x10
#define SCC_WR15_DCD_IE 0x08
#define SCC_WR15_zero 0x05
#define SCC_WR15_ZERO_COUNT_IE 0x02
#endif /*_SCC_8530_H_*/
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