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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 | /* * Copyright (c) by Jaroslav Kysela <perex@suse.cz> * DRAM access routines * * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #define __NO_VERSION__ #include <sound/driver.h> #include <linux/time.h> #include <sound/core.h> #include <sound/gus.h> #include <sound/info.h> static int snd_gus_dram_poke(snd_gus_card_t *gus, char *_buffer, unsigned int address, unsigned int size) { unsigned long flags; unsigned int size1, size2; char buffer[512], *pbuffer; while (size > 0) { if (copy_from_user(buffer, _buffer, 512)) return -EFAULT; size1 = size > 512 ? 512 : size; if (gus->interwave) { spin_lock_irqsave(&gus->reg_lock, flags); snd_gf1_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, 0x01); snd_gf1_dram_addr(gus, address); outsb(GUSP(gus, DRAM), buffer, size1); spin_unlock_irqrestore(&gus->reg_lock, flags); address += size1; } else { pbuffer = buffer; size2 = size1; while (size2--) snd_gf1_poke(gus, address++, *pbuffer++); } size -= size1; _buffer += size1; } return 0; } int snd_gus_dram_write(snd_gus_card_t *gus, char *buffer, unsigned int address, unsigned int size) { return snd_gus_dram_poke(gus, buffer, address, size); } static int snd_gus_dram_peek(snd_gus_card_t *gus, char *_buffer, unsigned int address, unsigned int size, int rom) { unsigned long flags; unsigned int size1, size2; char buffer[512], *pbuffer; while (size > 0) { size1 = size > 512 ? 512 : size; if (gus->interwave) { spin_lock_irqsave(&gus->reg_lock, flags); snd_gf1_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, rom ? 0x03 : 0x01); snd_gf1_dram_addr(gus, address); insb(GUSP(gus, DRAM), buffer, size1); snd_gf1_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, 0x01); spin_unlock_irqrestore(&gus->reg_lock, flags); address += size1; } else { pbuffer = buffer; size2 = size1; while (size2--) *pbuffer++ = snd_gf1_peek(gus, address++); } if (copy_to_user(_buffer, buffer, size1)) return -EFAULT; size -= size1; _buffer += size1; } return 0; } int snd_gus_dram_read(snd_gus_card_t *gus, char *buffer, unsigned int address, unsigned int size, int rom) { return snd_gus_dram_peek(gus, buffer, address, size, rom); } |