1 /* $NetBSD: sbcvar.h,v 1.2 1997/03/15 18:10:03 is Exp $ */ 2 3 /* 4 * Copyright (C) 1996 Scott Reynolds. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Scott Reynolds for 17 * the NetBSD Project. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * Transfers smaller than this are done using PIO 35 * (on assumption they're not worth PDMA overhead) 36 */ 37 #define MIN_DMA_LEN 128 38 39 /* 40 * Transfers larger than 8192 bytes need to be split up 41 * due to the size of the PDMA space. 42 */ 43 #define MAX_DMA_LEN 0x2000 44 45 #ifdef SBC_DEBUG 46 # define SBC_DB_INTR 0x01 47 # define SBC_DB_DMA 0x02 48 # define SBC_DB_REG 0x04 49 # define SBC_DB_BREAK 0x08 50 # ifndef DDB 51 # define Debugger() printf("Debug: sbc.c:%d\n", __LINE__) 52 # endif 53 # define SBC_BREAK \ 54 do { if (sbc_debug & SBC_DB_BREAK) Debugger(); } while (0) 55 #else 56 # define SBC_BREAK 57 #endif 58 59 /* 60 * This structure is used to keep track of PDMA requests. 61 */ 62 struct sbc_pdma_handle { 63 int dh_flags; /* flags */ 64 #define SBC_DH_BUSY 0x01 /* This handle is in use */ 65 #define SBC_DH_OUT 0x02 /* PDMA data out (write) */ 66 #define SBC_DH_DONE 0x04 /* PDMA transfer is complete */ 67 u_char *dh_addr; /* data buffer */ 68 int dh_len; /* length of data buffer */ 69 }; 70 71 /* 72 * The first structure member has to be the ncr5380_softc 73 * so we can just cast to go back and forth between them. 74 */ 75 struct sbc_softc { 76 struct ncr5380_softc ncr_sc; 77 volatile struct sbc_regs *sc_regs; 78 volatile vm_offset_t sc_drq_addr; 79 volatile vm_offset_t sc_nodrq_addr; 80 void (*sc_clrintr) __P((struct ncr5380_softc *)); 81 int sc_options; /* options for this instance. */ 82 struct sbc_pdma_handle sc_pdma[SCI_OPENINGS]; 83 }; 84 85 /* 86 * Options. By default, SCSI interrupts and reselect are disabled. 87 * You may enable either of these features with the `flags' directive 88 * in your kernel's configuration file. 89 * 90 * Alternatively, you can patch your kernel with DDB or some other 91 * mechanism. The sc_options member of the softc is OR'd with 92 * the value in sbc_options. 93 * 94 * The options code is based on the sparc 'si' driver's version of 95 * the same. 96 */ 97 #define SBC_PDMA 0x01 /* Use PDMA for polled transfers */ 98 #define SBC_INTR 0x02 /* Allow SCSI IRQ/DRQ interrupts */ 99 #define SBC_RESELECT 0x04 /* Allow disconnect/reselect */ 100 #define SBC_OPTIONS_MASK (SBC_RESELECT|SBC_INTR|SBC_PDMA) 101 #define SBC_OPTIONS_BITS "\10\3RESELECT\2INTR\1PDMA" 102 103 extern int sbc_debug; 104 extern int sbc_link_flags; 105 extern int sbc_options; 106 extern struct scsi_adapter sbc_ops; 107 extern struct scsi_device sbc_dev; 108 109 int sbc_pdma_in __P((struct ncr5380_softc *, int, int, u_char *)); 110 int sbc_pdma_out __P((struct ncr5380_softc *, int, int, u_char *)); 111 void sbc_irq_intr __P((void *)); 112 void sbc_drq_intr __P((void *)); 113 void sbc_dma_alloc __P((struct ncr5380_softc *)); 114 void sbc_dma_free __P((struct ncr5380_softc *)); 115 void sbc_dma_poll __P((struct ncr5380_softc *)); 116 void sbc_dma_setup __P((struct ncr5380_softc *)); 117 void sbc_dma_start __P((struct ncr5380_softc *)); 118 void sbc_dma_eop __P((struct ncr5380_softc *)); 119 void sbc_dma_stop __P((struct ncr5380_softc *)); 120 #ifdef SBC_DEBUG 121 void decode_5380_intr __P((struct ncr5380_softc *)); 122 #endif 123