1 /* $NetBSD: am9516.h,v 1.2 2003/05/03 18:11:03 wiz Exp $ */ 2 3 /* 4 * This file is derived from the file dev/devSCSI3.c from 5 * the Berkeley SPRITE distribution, which says: 6 * 7 * Copyright 1988 Regents of the University of California 8 * Permission to use, copy, modify, and distribute this 9 * software and its documentation for any purpose and without 10 * fee is hereby granted, provided that the above copyright 11 * notice appear in all copies. The University of California 12 * makes no representations about the suitability of this 13 * software for any purpose. It is provided "as is" without 14 * express or implied warranty. 15 */ 16 17 /* 18 * AMD 9516 UDC (Universal DMA Controller) Registers. 19 * This is used only in the OBIO version (3/50,3/60). 20 */ 21 22 /* addresses of the udc registers accessed directly by driver */ 23 #define UDC_ADR_MODE 0x38 /* master mode register */ 24 #define UDC_ADR_COMMAND 0x2e /* command register (write only) */ 25 #define UDC_ADR_STATUS 0x2e /* status register (read only) */ 26 #define UDC_ADR_CAR_HIGH 0x26 /* chain addr reg, high word */ 27 #define UDC_ADR_CAR_LOW 0x22 /* chain addr reg, low word */ 28 #define UDC_ADR_CARA_HIGH 0x1a /* cur addr reg A, high word */ 29 #define UDC_ADR_CARA_LOW 0x0a /* cur addr reg A, low word */ 30 #define UDC_ADR_CARB_HIGH 0x12 /* cur addr reg B, high word */ 31 #define UDC_ADR_CARB_LOW 0x02 /* cur addr reg B, low word */ 32 #define UDC_ADR_CMR_HIGH 0x56 /* channel mode reg, high word */ 33 #define UDC_ADR_CMR_LOW 0x52 /* channel mode reg, low word */ 34 #define UDC_ADR_COUNT 0x32 /* number of words to transfer */ 35 36 /* 37 * For a DMA transfer, the appropriate udc registers are loaded from a 38 * table in memory pointed to by the chain address register. 39 */ 40 struct udc_table { 41 u_short rsel; /* tells udc which regs to load */ 42 u_short addrh; /* high word of main mem DMA address */ 43 u_short addrl; /* low word of main mem DMA address */ 44 u_short count; /* num words to transfer */ 45 u_short cmrh; /* high word of channel mode reg */ 46 u_short cmrl; /* low word of channel mode reg */ 47 }; 48 49 /* indicates which udc registers are to be set based on info in above table */ 50 #define UDC_RSEL_RECV 0x0182 51 #define UDC_RSEL_SEND 0x0282 52 53 /* setting of chain mode reg: selects how the DMA op is to be executed */ 54 #define UDC_CMR_HIGH 0x0040 /* high word of channel mode reg */ 55 #define UDC_CMR_LSEND 0x00c2 /* low word of cmr when send */ 56 #define UDC_CMR_LRECV 0x00d2 /* low word of cmr when receiving */ 57 58 /* setting for the master mode register */ 59 #define UDC_MODE 0xd /* enables udc chip */ 60 61 /* setting for the low byte in the high word of an address */ 62 #define UDC_ADDR_INFO 0x40 /* inc addr after each word is DMA'd */ 63 64 /* udc commands */ 65 #define UDC_CMD_STRT_CHN 0xa0 /* start chaining */ 66 #define UDC_CMD_CIE 0x32 /* channel 1 interrupt enable */ 67 #define UDC_CMD_RESET 0x00 /* reset udc, same as hdw reset */ 68 69 /* bits in the udc status register */ 70 #define UDC_SR_CIE 0x8000 /* channel interrupt enable */ 71 #define UDC_SR_IP 0x2000 /* interrupt pending */ 72 #define UDC_SR_CA 0x1000 /* channel abort */ 73 #define UDC_SR_NAC 0x0800 /* no auto reload or chaining*/ 74 #define UDC_SR_WFB 0x0400 /* waiting for bus */ 75 #define UDC_SR_SIP 0x0200 /* second interrupt pending */ 76 #define UDC_SR_HM 0x0040 /* hardware mask */ 77 #define UDC_SR_HRQ 0x0020 /* hardware request */ 78 #define UDC_SR_MCH 0x0010 /* match on upper comparator byte */ 79 #define UDC_SR_MCL 0x0008 /* match on lower comparator byte */ 80 #define UDC_SR_MC 0x0004 /* match condition ended DMA */ 81 #define UDC_SR_EOP 0x0002 /* eop condition ended DMA */ 82 #define UDC_SR_TC 0x0001 /* termination of count ended DMA */ 83 84