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linux-next/sound/isa/sb/emu8000_patch.c
Thomas Gleixner 1a59d1b8e0 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 
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>
2019-05-30 11:26:35 -07:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Patch routines for the emu8000 (AWE32/64)
*
* Copyright (C) 1999 Steve Ratcliffe
* Copyright (C) 1999-2000 Takashi Iwai <tiwai@suse.de>
*/
#include "emu8000_local.h"
#include <linux/sched/signal.h>
#include <linux/uaccess.h>
#include <linux/moduleparam.h>
static int emu8000_reset_addr;
module_param(emu8000_reset_addr, int, 0444);
MODULE_PARM_DESC(emu8000_reset_addr, "reset write address at each time (makes slowdown)");
/*
* Open up channels.
*/
static int
snd_emu8000_open_dma(struct snd_emu8000 *emu, int write)
{
int i;
/* reserve all 30 voices for loading */
for (i = 0; i < EMU8000_DRAM_VOICES; i++) {
snd_emux_lock_voice(emu->emu, i);
snd_emu8000_dma_chan(emu, i, write);
}
/* assign voice 31 and 32 to ROM */
EMU8000_VTFT_WRITE(emu, 30, 0);
EMU8000_PSST_WRITE(emu, 30, 0x1d8);
EMU8000_CSL_WRITE(emu, 30, 0x1e0);
EMU8000_CCCA_WRITE(emu, 30, 0x1d8);
EMU8000_VTFT_WRITE(emu, 31, 0);
EMU8000_PSST_WRITE(emu, 31, 0x1d8);
EMU8000_CSL_WRITE(emu, 31, 0x1e0);
EMU8000_CCCA_WRITE(emu, 31, 0x1d8);
return 0;
}
/*
* Close all dram channels.
*/
static void
snd_emu8000_close_dma(struct snd_emu8000 *emu)
{
int i;
for (i = 0; i < EMU8000_DRAM_VOICES; i++) {
snd_emu8000_dma_chan(emu, i, EMU8000_RAM_CLOSE);
snd_emux_unlock_voice(emu->emu, i);
}
}
/*
*/
#define BLANK_LOOP_START 4
#define BLANK_LOOP_END 8
#define BLANK_LOOP_SIZE 12
#define BLANK_HEAD_SIZE 48
/*
* Read a word from userland, taking care of conversions from
* 8bit samples etc.
*/
static unsigned short
read_word(const void __user *buf, int offset, int mode)
{
unsigned short c;
if (mode & SNDRV_SFNT_SAMPLE_8BITS) {
unsigned char cc;
get_user(cc, (unsigned char __user *)buf + offset);
c = cc << 8; /* convert 8bit -> 16bit */
} else {
#ifdef SNDRV_LITTLE_ENDIAN
get_user(c, (unsigned short __user *)buf + offset);
#else
unsigned short cc;
get_user(cc, (unsigned short __user *)buf + offset);
c = swab16(cc);
#endif
}
if (mode & SNDRV_SFNT_SAMPLE_UNSIGNED)
c ^= 0x8000; /* unsigned -> signed */
return c;
}
/*
*/
static void
snd_emu8000_write_wait(struct snd_emu8000 *emu)
{
while ((EMU8000_SMALW_READ(emu) & 0x80000000) != 0) {
schedule_timeout_interruptible(1);
if (signal_pending(current))
break;
}
}
/*
* write sample word data
*
* You should not have to keep resetting the address each time
* as the chip is supposed to step on the next address automatically.
* It mostly does, but during writes of some samples at random it
* completely loses words (every one in 16 roughly but with no
* obvious pattern).
*
* This is therefore much slower than need be, but is at least
* working.
*/
static inline void
write_word(struct snd_emu8000 *emu, int *offset, unsigned short data)
{
if (emu8000_reset_addr) {
if (emu8000_reset_addr > 1)
snd_emu8000_write_wait(emu);
EMU8000_SMALW_WRITE(emu, *offset);
}
EMU8000_SMLD_WRITE(emu, data);
*offset += 1;
}
/*
* Write the sample to EMU800 memory. This routine is invoked out of
* the generic soundfont routines as a callback.
*/
int
snd_emu8000_sample_new(struct snd_emux *rec, struct snd_sf_sample *sp,
struct snd_util_memhdr *hdr,
const void __user *data, long count)
{
int i;
int rc;
int offset;
int truesize;
int dram_offset, dram_start;
struct snd_emu8000 *emu;
emu = rec->hw;
if (snd_BUG_ON(!sp))
return -EINVAL;
if (sp->v.size == 0)
return 0;
/* be sure loop points start < end */
if (sp->v.loopstart > sp->v.loopend)
swap(sp->v.loopstart, sp->v.loopend);
/* compute true data size to be loaded */
truesize = sp->v.size;
if (sp->v.mode_flags & (SNDRV_SFNT_SAMPLE_BIDIR_LOOP|SNDRV_SFNT_SAMPLE_REVERSE_LOOP))
truesize += sp->v.loopend - sp->v.loopstart;
if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_NO_BLANK)
truesize += BLANK_LOOP_SIZE;
sp->block = snd_util_mem_alloc(hdr, truesize * 2);
if (sp->block == NULL) {
/*snd_printd("EMU8000: out of memory\n");*/
/* not ENOMEM (for compatibility) */
return -ENOSPC;
}
if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS) {
if (!access_ok(data, sp->v.size))
return -EFAULT;
} else {
if (!access_ok(data, sp->v.size * 2))
return -EFAULT;
}
/* recalculate address offset */
sp->v.end -= sp->v.start;
sp->v.loopstart -= sp->v.start;
sp->v.loopend -= sp->v.start;
sp->v.start = 0;
/* dram position (in word) -- mem_offset is byte */
dram_offset = EMU8000_DRAM_OFFSET + (sp->block->offset >> 1);
dram_start = dram_offset;
/* set the total size (store onto obsolete checksum value) */
sp->v.truesize = truesize * 2; /* in bytes */
snd_emux_terminate_all(emu->emu);
if ((rc = snd_emu8000_open_dma(emu, EMU8000_RAM_WRITE)) != 0)
return rc;
/* Set the address to start writing at */
snd_emu8000_write_wait(emu);
EMU8000_SMALW_WRITE(emu, dram_offset);
/*snd_emu8000_init_fm(emu);*/
#if 0
/* first block - write 48 samples for silence */
if (! sp->block->offset) {
for (i = 0; i < BLANK_HEAD_SIZE; i++) {
write_word(emu, &dram_offset, 0);
}
}
#endif
offset = 0;
for (i = 0; i < sp->v.size; i++) {
unsigned short s;
s = read_word(data, offset, sp->v.mode_flags);
offset++;
write_word(emu, &dram_offset, s);
/* we may take too long time in this loop.
* so give controls back to kernel if needed.
*/
cond_resched();
if (i == sp->v.loopend &&
(sp->v.mode_flags & (SNDRV_SFNT_SAMPLE_BIDIR_LOOP|SNDRV_SFNT_SAMPLE_REVERSE_LOOP)))
{
int looplen = sp->v.loopend - sp->v.loopstart;
int k;
/* copy reverse loop */
for (k = 1; k <= looplen; k++) {
s = read_word(data, offset - k, sp->v.mode_flags);
write_word(emu, &dram_offset, s);
}
if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_BIDIR_LOOP) {
sp->v.loopend += looplen;
} else {
sp->v.loopstart += looplen;
sp->v.loopend += looplen;
}
sp->v.end += looplen;
}
}
/* if no blank loop is attached in the sample, add it */
if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_NO_BLANK) {
for (i = 0; i < BLANK_LOOP_SIZE; i++) {
write_word(emu, &dram_offset, 0);
}
if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_SINGLESHOT) {
sp->v.loopstart = sp->v.end + BLANK_LOOP_START;
sp->v.loopend = sp->v.end + BLANK_LOOP_END;
}
}
/* add dram offset */
sp->v.start += dram_start;
sp->v.end += dram_start;
sp->v.loopstart += dram_start;
sp->v.loopend += dram_start;
snd_emu8000_close_dma(emu);
snd_emu8000_init_fm(emu);
return 0;
}
/*
* free a sample block
*/
int
snd_emu8000_sample_free(struct snd_emux *rec, struct snd_sf_sample *sp,
struct snd_util_memhdr *hdr)
{
if (sp->block) {
snd_util_mem_free(hdr, sp->block);
sp->block = NULL;
}
return 0;
}
/*
* sample_reset callback - terminate voices
*/
void
snd_emu8000_sample_reset(struct snd_emux *rec)
{
snd_emux_terminate_all(rec);
}
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