| 1 | /* $ZEL: sis1100_read_block.c,v 1.2 2004/05/27 23:10:30 wuestner Exp $ */
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| 2 |
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| 3 | /*
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| 4 | * Copyright (c) 2001-2004
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| 5 | * Peter Wuestner. All rights reserved.
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| 6 | *
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| 7 | * Redistribution and use in source and binary forms, with or without
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| 8 | * modification, are permitted provided that the following conditions
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| 9 | * are met:
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| 10 | * 1. Redistributions of source code must retain the above copyright
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| 11 | * notice, this list of conditions, and the following disclaimer.
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| 12 | * 2. Redistributions in binary form must reproduce the above copyright
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| 13 | * notice, this list of conditions and the following disclaimer in the
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| 14 | * documentation and/or other materials provided with the distribution.
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| 15 | *
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| 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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| 17 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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| 20 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 21 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 22 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 23 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 24 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 25 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 26 | * SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | #include "sis1100_sc.h"
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| 30 |
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| 31 | #if !defined(__NetBSD__) && ! defined(__linux__)
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| 32 | #error Invalid or Unknown Operating System
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| 33 | #endif
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| 34 |
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| 35 | /*
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| 36 | * size : number of bytes per dataword (1, 2 or 4)
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| 37 | * num : number of words to be read
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| 38 | * num_read: number of words read
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| 39 | */
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| 40 |
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| 41 | int
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| 42 | sis1100_read_block(struct sis1100_softc* sc, struct sis1100_fdata* fd,
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| 43 | int size, int fifo, size_t num, size_t* num_read, int space,
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| 44 | int32_t am, u_int32_t addr, u_int8_t* data, u_int32_t* error)
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| 45 | {
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| 46 | if (!num) {*error=0; *num_read=0; return 0;}
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| 47 | if (sc->remote_hw==sis1100_hw_invalid) return ENXIO;
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| 48 |
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| 49 | if (!ACCESS_OK(data, num*size, 0)) return EFAULT;
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| 50 |
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| 51 | if (num==1) {
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| 52 | u_int32_t val;
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| 53 | *error=sis1100_tmp_read(sc, addr, am, size, space, &val);
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| 54 |
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| 55 | switch (size) {
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| 56 | #ifdef __NetBSD__
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| 57 | case 4: suword(data, val); break;
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| 58 | case 2: susword(data, val); break;
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| 59 | case 1: subyte(data, val); break;
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| 60 | #elif __linux__
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| 61 | case 4: __put_user(val, (u_int32_t*)data); break;
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| 62 | case 2: __put_user(val, (u_int16_t*)data); break;
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| 63 | case 1: __put_user(val, (u_int8_t*)data); break;
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| 64 | #endif
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| 65 | }
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| 66 | *num_read=!*error;
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| 67 | return 0;
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| 68 | } else {
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| 69 | int res;
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| 70 | /*if ((size==4)&&fd->mindmalen_r&&(num>=fd->mindmalen_r)) {*/
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| 71 | if (fd->mindmalen_r && (num>=fd->mindmalen_r)) {
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| 72 | res=sis1100_read_dma(sc, fd, addr, am, size,
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| 73 | space, fifo, num, num_read, data, error);
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| 74 | } else {
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| 75 | res=sis1100_read_loop(sc, fd, addr, am, size,
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| 76 | space, fifo, num, num_read, data, error);
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| 77 | }
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| 78 | return res;
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| 79 | }
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| 80 | }
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