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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Patch transfer callback for Emu10k1
*
* Copyright (C) 2000 Takashi iwai <tiwai@suse.de>
*/
/*
* All the code for loading in a patch. There is very little that is
* chip specific here. Just the actual writing to the board.
*/
#include "emu10k1_synth_local.h"
/*
*/
#define BLANK_LOOP_START 4
#define BLANK_LOOP_END 8
#define BLANK_LOOP_SIZE 12
#define BLANK_HEAD_SIZE 3
/*
* allocate a sample block and copy data from userspace
*/
int
snd_emu10k1_sample_new(struct snd_emux *rec, struct snd_sf_sample *sp,
struct snd_util_memhdr *hdr,
const void __user *data, long count)
{
u8 fill;
u32 xor;
int shift;
int offset;
int truesize, size, blocksize;
int loop_start, loop_end, loop_size, data_end, unroll;
struct snd_emu10k1 *emu;
emu = rec->hw;
if (snd_BUG_ON(!sp || !hdr))
return -EINVAL;
if (sp->v.mode_flags & (SNDRV_SFNT_SAMPLE_BIDIR_LOOP | SNDRV_SFNT_SAMPLE_REVERSE_LOOP)) {
/* should instead return -ENOTSUPP; but compatibility */
dev_warn(emu->card->dev,
"Emu10k1 wavetable patch %d with unsupported loop feature\n",
sp->v.sample);
}
if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS) {
shift = 0;
fill = 0x80;
xor = (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_UNSIGNED) ? 0 : 0x80808080;
} else {
shift = 1;
fill = 0;
xor = (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_UNSIGNED) ? 0x80008000 : 0;
}
/* compute true data size to be loaded */
truesize = sp->v.size + BLANK_HEAD_SIZE;
if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_NO_BLANK) {
truesize += BLANK_LOOP_SIZE;
/* if no blank loop is attached in the sample, add it */
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;
}
}
loop_start = sp->v.loopstart;
loop_end = sp->v.loopend;
loop_size = loop_end - loop_start;
if (!loop_size)
return -EINVAL;
data_end = sp->v.end;
/* recalculate offset */
sp->v.start += BLANK_HEAD_SIZE;
sp->v.end += BLANK_HEAD_SIZE;
sp->v.loopstart += BLANK_HEAD_SIZE;
sp->v.loopend += BLANK_HEAD_SIZE;
// Automatic pre-filling of the cache does not work in the presence
// of loops (*), and we don't want to fill it manually, as that is
// fiddly and slow. So we unroll the loop until the loop end is
// beyond the cache size.
// (*) Strictly speaking, a single iteration is supported (that's
// how it works when the playback engine runs), but handling this
// special case is not worth it.
unroll = 0;
while (sp->v.loopend < 64) {
truesize += loop_size;
sp->v.loopstart += loop_size;
sp->v.loopend += loop_size;
sp->v.end += loop_size;
unroll++;
}
/* try to allocate a memory block */
blocksize = truesize << shift;
sp->block = snd_emu10k1_synth_alloc(emu, blocksize);
if (sp->block == NULL) {
dev_dbg(emu->card->dev,
"synth malloc failed (size=%d)\n", blocksize);
/* not ENOMEM (for compatibility with OSS) */
return -ENOSPC;
}
/* set the total size */
sp->v.truesize = blocksize;
/* write blank samples at head */
offset = 0;
size = BLANK_HEAD_SIZE << shift;
snd_emu10k1_synth_memset(emu, sp->block, offset, size, fill);
offset += size;
/* copy provided samples */
if (unroll && loop_end <= data_end) {
size = loop_end << shift;
if (snd_emu10k1_synth_copy_from_user(emu, sp->block, offset, data, size, xor))
goto faulty;
offset += size;
data += loop_start << shift;
while (--unroll > 0) {
size = loop_size << shift;
if (snd_emu10k1_synth_copy_from_user(emu, sp->block, offset, data, size, xor))
goto faulty;
offset += size;
}
size = (data_end - loop_start) << shift;
} else {
size = data_end << shift;
}
if (snd_emu10k1_synth_copy_from_user(emu, sp->block, offset, data, size, xor))
goto faulty;
offset += size;
/* clear rest of samples (if any) */
if (offset < blocksize)
snd_emu10k1_synth_memset(emu, sp->block, offset, blocksize - offset, fill);
return 0;
faulty:
snd_emu10k1_synth_free(emu, sp->block);
sp->block = NULL;
return -EFAULT;
}
/*
* free a sample block
*/
int
snd_emu10k1_sample_free(struct snd_emux *rec, struct snd_sf_sample *sp,
struct snd_util_memhdr *hdr)
{
struct snd_emu10k1 *emu;
emu = rec->hw;
if (snd_BUG_ON(!sp || !hdr))
return -EINVAL;
if (sp->block) {
snd_emu10k1_synth_free(emu, sp->block);
sp->block = NULL;
}
return 0;
}
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