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1a59d1b8e0
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1334 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
87 lines
2.2 KiB
C
87 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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* DRAM access routines
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*/
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#include <linux/time.h>
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#include <sound/core.h>
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#include <sound/gus.h>
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#include <sound/info.h>
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static int snd_gus_dram_poke(struct snd_gus_card *gus, char __user *_buffer,
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unsigned int address, unsigned int size)
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{
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unsigned long flags;
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unsigned int size1, size2;
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char buffer[256], *pbuffer;
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while (size > 0) {
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size1 = size > sizeof(buffer) ? sizeof(buffer) : size;
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if (copy_from_user(buffer, _buffer, size1))
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return -EFAULT;
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if (gus->interwave) {
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spin_lock_irqsave(&gus->reg_lock, flags);
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snd_gf1_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, 0x01);
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snd_gf1_dram_addr(gus, address);
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outsb(GUSP(gus, DRAM), buffer, size1);
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spin_unlock_irqrestore(&gus->reg_lock, flags);
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address += size1;
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} else {
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pbuffer = buffer;
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size2 = size1;
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while (size2--)
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snd_gf1_poke(gus, address++, *pbuffer++);
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}
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size -= size1;
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_buffer += size1;
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}
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return 0;
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}
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int snd_gus_dram_write(struct snd_gus_card *gus, char __user *buffer,
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unsigned int address, unsigned int size)
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{
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return snd_gus_dram_poke(gus, buffer, address, size);
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}
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static int snd_gus_dram_peek(struct snd_gus_card *gus, char __user *_buffer,
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unsigned int address, unsigned int size,
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int rom)
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{
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unsigned long flags;
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unsigned int size1, size2;
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char buffer[256], *pbuffer;
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while (size > 0) {
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size1 = size > sizeof(buffer) ? sizeof(buffer) : size;
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if (gus->interwave) {
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spin_lock_irqsave(&gus->reg_lock, flags);
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snd_gf1_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, rom ? 0x03 : 0x01);
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snd_gf1_dram_addr(gus, address);
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insb(GUSP(gus, DRAM), buffer, size1);
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snd_gf1_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, 0x01);
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spin_unlock_irqrestore(&gus->reg_lock, flags);
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address += size1;
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} else {
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pbuffer = buffer;
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size2 = size1;
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while (size2--)
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*pbuffer++ = snd_gf1_peek(gus, address++);
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}
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if (copy_to_user(_buffer, buffer, size1))
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return -EFAULT;
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size -= size1;
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_buffer += size1;
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}
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return 0;
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}
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int snd_gus_dram_read(struct snd_gus_card *gus, char __user *buffer,
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unsigned int address, unsigned int size,
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int rom)
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{
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return snd_gus_dram_peek(gus, buffer, address, size, rom);
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}
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