/* $OpenBSD: ascreg.h,v 1.1 1996/06/24 09:07:19 pefo Exp $ */ /*- * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Ralph Campbell and Rick Macklem. * * 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 the University of * California, Berkeley and its contributors. * 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. * * from: @(#)ascreg.h 8.1 (Berkeley) 6/10/93 * $Id: ascreg.h,v 1.1 1996/06/24 09:07:19 pefo Exp $ */ /* * 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 * 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 the * rights to redistribute these changes. */ /* * HISTORY * Log: scsi_53C94.h,v * Revision 2.4 91/02/05 17:44:59 mrt * Added author notices * [91/02/04 11:18:32 mrt] * * Changed to use new Mach copyright * [91/02/02 12:17:11 mrt] * * Revision 2.3 90/12/05 23:34:46 af * Documented max DMA xfer size. * [90/12/03 23:39:36 af] * * Revision 2.1.1.1 90/11/01 03:38:54 af * Created, from the DEC specs: * "PMAZ-AA TURBOchannel SCSI Module Functional Specification" * Workstation Systems Engineering, Palo Alto, CA. Aug 27, 1990. * And from the NCR data sheets * "NCR 53C94, 53C95, 53C96 Advanced SCSI Controller" * [90/09/03 af] */ /* * File: scsi_53C94.h * Author: Alessandro Forin, Carnegie Mellon University * Date: 9/90 * * Defines for the NCR 53C94 ASC (SCSI interface) * Some gotcha came from the "86C01/53C94 DMA lab work" written * by Ken Stewart (NCR MED Logic Products Applications Engineer) * courtesy of NCR. Thanks Ken ! */ #define ASC_OFFSET_53C94 0x0 /* from module base */ #define ASC_NCMD 7 /* Number of simultaneous cmds */ /* * Synch xfer parameters, and timing conversions */ #define SCSI_MIN_PERIOD 50 /* in 4 nsecs units */ #define ASC_MIN_PERIOD40 8 /* in CLKS/BYTE, 1 CLK = 25nsecs */ #define ASC_MIN_PERIOD25 5 /* in CLKS/BYTE, 1 CLK = 40nsecs */ #define ASC_MIN_PERIOD12 3 /* in CLKS/BYTE, 1 CLK = 80nsecs */ #define ASC_MAX_PERIOD40 56 /* in CLKS/BYTE, 1 CLK = 25nsecs */ #define ASC_MAX_PERIOD25 35 /* in CLKS/BYTE, 1 CLK = 40nsecs */ #define ASC_MAX_PERIOD12 18 /* in CLKS/BYTE, 1 CLK = 80nsecs */ #define ASC_MAX_OFFSET 15 /* pure number */ /* * Register map, padded as needed */ typedef volatile struct { u_char asc_tc_lsb; /* rw: Transfer Counter LSB */ u_char asc_tc_msb; /* rw: Transfer Counter MSB */ u_char asc_fifo; /* rw: FIFO top */ u_char asc_cmd; /* rw: Command */ u_char asc_status; /* r: Status */ #define asc_dbus_id asc_status /* w: Destination Bus ID */ u_char asc_intr; /* r: Interrupt */ #define asc_sel_timo asc_intr /* w: (re)select timeout */ u_char asc_ss; /* r: Sequence Step */ #define asc_syn_p asc_ss /* w: synchronous period */ u_char asc_flags; /* r: FIFO flags + seq step */ #define asc_syn_o asc_flags /* w: synchronous offset */ u_char asc_cnfg1; /* rw: Configuration 1 */ u_char asc_ccf; /* w: Clock Conv. Factor */ u_char asc_test; /* w: Test Mode */ u_char asc_cnfg2; /* rw: Configuration 2 */ u_char asc_cnfg3; /* rw: Configuration 3 */ u_char asc_res_fifo; /* w: Reserve FIFO byte */ } asc_regmap_t; /* * Transfer Count: access macros * That a NOP is required after loading the dma counter * I learned on the NCR test code. Sic. */ #define ASC_TC_MAX 0x10000 #define ASC_TC_GET(ptr, val) \ val = (ptr)->asc_tc_lsb | ((ptr)->asc_tc_msb << 8) #define ASC_TC_PUT(ptr, val) \ (ptr)->asc_tc_lsb = (val); \ (ptr)->asc_tc_msb = (val) >> 8; \ (ptr)->asc_cmd = ASC_CMD_NOP | ASC_CMD_DMA; /* * Command register (command codes) */ #define ASC_CMD_DMA 0x80 /* Miscellaneous */ #define ASC_CMD_NOP 0x00 #define ASC_CMD_FLUSH 0x01 #define ASC_CMD_RESET 0x02 #define ASC_CMD_BUS_RESET 0x03 /* Initiator state */ #define ASC_CMD_XFER_INFO 0x10 #define ASC_CMD_I_COMPLETE 0x11 #define ASC_CMD_MSG_ACPT 0x12 #define ASC_CMD_XFER_PAD 0x18 #define ASC_CMD_SET_ATN 0x1a #define ASC_CMD_CLR_ATN 0x1b /* Target state */ #define ASC_CMD_SND_MSG 0x20 #define ASC_CMD_SND_STATUS 0x21 #define ASC_CMD_SND_DATA 0x22 #define ASC_CMD_DISC_SEQ 0x23 #define ASC_CMD_TERM 0x24 #define ASC_CMD_T_COMPLETE 0x25 #define ASC_CMD_DISC 0x27 #define ASC_CMD_RCV_MSG 0x28 #define ASC_CMD_RCV_CDB 0x29 #define ASC_CMD_RCV_DATA 0x2a #define ASC_CMD_RCV_CMD 0x2b #define ASC_CMD_ABRT_DMA 0x04 /* Disconnected state */ #define ASC_CMD_RESELECT 0x40 #define ASC_CMD_SEL 0x41 #define ASC_CMD_SEL_ATN 0x42 #define ASC_CMD_SEL_ATN_STOP 0x43 #define ASC_CMD_ENABLE_SEL 0x44 #define ASC_CMD_DISABLE_SEL 0x45 #define ASC_CMD_SEL_ATN3 0x46 /* * Status register, and phase encoding */ #define ASC_CSR_INT 0x80 #define ASC_CSR_GE 0x40 #define ASC_CSR_PE 0x20 #define ASC_CSR_TC 0x10 #define ASC_CSR_VGC 0x08 #define ASC_CSR_MSG 0x04 #define ASC_CSR_CD 0x02 #define ASC_CSR_IO 0x01 #define ASC_PHASE(csr) ((csr) & 0x7) #define ASC_PHASE_DATAO 0x0 #define ASC_PHASE_DATAI 0x1 #define ASC_PHASE_COMMAND 0x2 #define ASC_PHASE_STATUS 0x3 /* 4..5 ANSI reserved */ #define ASC_PHASE_MSG_OUT 0x6 #define ASC_PHASE_MSG_IN 0x7 /* * Destination Bus ID */ #define ASC_DEST_ID_MASK 0x07 /* * Interrupt register */ #define ASC_INT_RESET 0x80 #define ASC_INT_ILL 0x40 #define ASC_INT_DISC 0x20 #define ASC_INT_BS 0x10 #define ASC_INT_FC 0x08 #define ASC_INT_RESEL 0x04 #define ASC_INT_SEL_ATN 0x02 #define ASC_INT_SEL 0x01 /* * Timeout register: * * val = (timeout * CLK_freq) / (8192 * CCF); */ #define ASC_TIMEOUT_250(clk, ccf) (((clk) * 31) / (ccf)) /* * Sequence Step register */ #define ASC_SS_RESERVED 0xf0 #define ASC_SS_SOM 0x08 #define ASC_SS_MASK 0x07 #define ASC_SS(ss) ((ss) & ASC_SS_MASK) /* * Synchronous Transfer Period */ #define ASC_STP_MASK 0x1f #define ASC_STP_MIN 0x05 /* 5 clk per byte */ #define ASC_STP_MAX 0x04 /* after ovfl, 35 clk/byte */ /* * FIFO flags */ #define ASC_FLAGS_SEQ_STEP 0xe0 #define ASC_FLAGS_FIFO_CNT 0x1f /* * Synchronous offset */ #define ASC_SYNO_MASK 0x0f /* 0 -> asyn */ /* * Configuration 1 */ #define ASC_CNFG1_SLOW 0x80 #define ASC_CNFG1_SRD 0x40 #define ASC_CNFG1_P_TEST 0x20 #define ASC_CNFG1_P_CHECK 0x10 #define ASC_CNFG1_TEST 0x08 #define ASC_CNFG1_MY_BUS_ID 0x07 /* * CCF register */ #define ASC_CCF(clk) ((((clk) - 1) / 5) + 1) /* * Test register */ #define ASC_TEST_XXXX 0xf8 #define ASC_TEST_HI_Z 0x04 #define ASC_TEST_I 0x02 #define ASC_TEST_T 0x01 /* * Configuration 2 */ #define ASC_CNFG2_RFB 0x80 #define ASC_CNFG2_EPL 0x40 #define ASC_CNFG2_EBC 0x20 #define ASC_CNFG2_DREQ_HIZ 0x10 #define ASC_CNFG2_SCSI2 0x08 #define ASC_CNFG2_BPA 0x04 #define ASC_CNFG2_RPE 0x02 #define ASC_CNFG2_DPE 0x01 /* * Configuration 3 */ #define ASC_CNFG3_RESERVED 0xf8 #define ASC_CNFG3_SRB 0x04 #define ASC_CNFG3_ALT_DMA 0x02 #define ASC_CNFG3_T8 0x01 #define ST_MASK 0x3e