diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /sound/isa/gus/gus_dram.c |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'sound/isa/gus/gus_dram.c')
-rw-r--r-- | sound/isa/gus/gus_dram.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/sound/isa/gus/gus_dram.c b/sound/isa/gus/gus_dram.c new file mode 100644 index 000000000000..22120b868b5c --- /dev/null +++ b/sound/isa/gus/gus_dram.c @@ -0,0 +1,103 @@ +/* + * 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 + * + */ + +#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 __user *_buffer, + unsigned int address, unsigned int size) +{ + unsigned long flags; + unsigned int size1, size2; + char buffer[256], *pbuffer; + + while (size > 0) { + size1 = size > sizeof(buffer) ? sizeof(buffer) : size; + if (copy_from_user(buffer, _buffer, size1)) + return -EFAULT; + 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 __user *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 __user *_buffer, + unsigned int address, unsigned int size, + int rom) +{ + unsigned long flags; + unsigned int size1, size2; + char buffer[256], *pbuffer; + + while (size > 0) { + size1 = size > sizeof(buffer) ? sizeof(buffer) : 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 __user *buffer, + unsigned int address, unsigned int size, + int rom) +{ + return snd_gus_dram_peek(gus, buffer, address, size, rom); +} |