projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 | 1 | /* |
| c1017a4c | 2 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
| 1da177e4 LT |
3 | * DRAM access routines |
| 4 | * | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify | |
| 7 | * it under the terms of the GNU General Public License as published by | |
| 8 | * the Free Software Foundation; either version 2 of the License, or | |
| 9 | * (at your option) any later version. | |
| 10 | * | |
| 11 | * This program is distributed in the hope that it will be useful, | |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 14 | * GNU General Public License for more details. | |
| 15 | * | |
| 16 | * You should have received a copy of the GNU General Public License | |
| 17 | * along with this program; if not, write to the Free Software | |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 19 | * | |
| 20 | */ | |
| 21 | ||
| 1da177e4 LT |
22 | #include <linux/time.h> |
| 23 | #include <sound/core.h> | |
| 24 | #include <sound/gus.h> | |
| 25 | #include <sound/info.h> | |
| 26 | ||
| 27 | ||
| 5e2da206 | 28 | static int snd_gus_dram_poke(struct snd_gus_card *gus, char __user *_buffer, |
| 1da177e4 LT |
29 | unsigned int address, unsigned int size) |
| 30 | { | |
| 31 | unsigned long flags; | |
| 32 | unsigned int size1, size2; | |
| 33 | char buffer[256], *pbuffer; | |
| 34 | ||
| 35 | while (size > 0) { | |
| 36 | size1 = size > sizeof(buffer) ? sizeof(buffer) : size; | |
| 37 | if (copy_from_user(buffer, _buffer, size1)) | |
| 38 | return -EFAULT; | |
| 39 | if (gus->interwave) { | |
| 40 | spin_lock_irqsave(&gus->reg_lock, flags); | |
| 41 | snd_gf1_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, 0x01); | |
| 42 | snd_gf1_dram_addr(gus, address); | |
| 43 | outsb(GUSP(gus, DRAM), buffer, size1); | |
| 44 | spin_unlock_irqrestore(&gus->reg_lock, flags); | |
| 45 | address += size1; | |
| 46 | } else { | |
| 47 | pbuffer = buffer; | |
| 48 | size2 = size1; | |
| 49 | while (size2--) | |
| 50 | snd_gf1_poke(gus, address++, *pbuffer++); | |
| 51 | } | |
| 52 | size -= size1; | |
| 53 | _buffer += size1; | |
| 54 | } | |
| 55 | return 0; | |
| 56 | } | |
| 57 | ||
| 58 | ||
| 5e2da206 | 59 | int snd_gus_dram_write(struct snd_gus_card *gus, char __user *buffer, |
| 1da177e4 LT |
60 | unsigned int address, unsigned int size) |
| 61 | { | |
| 62 | return snd_gus_dram_poke(gus, buffer, address, size); | |
| 63 | } | |
| 64 | ||
| 5e2da206 | 65 | static int snd_gus_dram_peek(struct snd_gus_card *gus, char __user *_buffer, |
| 1da177e4 LT |
66 | unsigned int address, unsigned int size, |
| 67 | int rom) | |
| 68 | { | |
| 69 | unsigned long flags; | |
| 70 | unsigned int size1, size2; | |
| 71 | char buffer[256], *pbuffer; | |
| 72 | ||
| 73 | while (size > 0) { | |
| 74 | size1 = size > sizeof(buffer) ? sizeof(buffer) : size; | |
| 75 | if (gus->interwave) { | |
| 76 | spin_lock_irqsave(&gus->reg_lock, flags); | |
| 77 | snd_gf1_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, rom ? 0x03 : 0x01); | |
| 78 | snd_gf1_dram_addr(gus, address); | |
| 79 | insb(GUSP(gus, DRAM), buffer, size1); | |
| 80 | snd_gf1_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, 0x01); | |
| 81 | spin_unlock_irqrestore(&gus->reg_lock, flags); | |
| 82 | address += size1; | |
| 83 | } else { | |
| 84 | pbuffer = buffer; | |
| 85 | size2 = size1; | |
| 86 | while (size2--) | |
| 87 | *pbuffer++ = snd_gf1_peek(gus, address++); | |
| 88 | } | |
| 89 | if (copy_to_user(_buffer, buffer, size1)) | |
| 90 | return -EFAULT; | |
| 91 | size -= size1; | |
| 92 | _buffer += size1; | |
| 93 | } | |
| 94 | return 0; | |
| 95 | } | |
| 96 | ||
| 5e2da206 | 97 | int snd_gus_dram_read(struct snd_gus_card *gus, char __user *buffer, |
| 1da177e4 LT |
98 | unsigned int address, unsigned int size, |
| 99 | int rom) | |
| 100 | { | |
| 101 | return snd_gus_dram_peek(gus, buffer, address, size, rom); | |
| 102 | } |