You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
240 lines
6.9 KiB
240 lines
6.9 KiB
/*
|
|
**********************************************************************
|
|
* passthrough.c -- Emu10k1 digital passthrough
|
|
* Copyright (C) 2001 Juha Yrjölä <jyrjola@cc.hut.fi>
|
|
*
|
|
**********************************************************************
|
|
*
|
|
* Date Author Summary of changes
|
|
* ---- ------ ------------------
|
|
* May 15, 2001 Juha Yrjölä base code release
|
|
*
|
|
**********************************************************************
|
|
*
|
|
* 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., 675 Mass Ave, Cambridge, MA 02139,
|
|
* USA.
|
|
*
|
|
**********************************************************************
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/poll.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/bitops.h>
|
|
#include <asm/io.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/smp_lock.h>
|
|
|
|
#include "hwaccess.h"
|
|
#include "cardwo.h"
|
|
#include "cardwi.h"
|
|
#include "recmgr.h"
|
|
#include "irqmgr.h"
|
|
#include "audio.h"
|
|
#include "8010.h"
|
|
|
|
static void pt_putsamples(struct pt_data *pt, u16 *ptr, u16 left, u16 right)
|
|
{
|
|
unsigned int idx;
|
|
|
|
ptr[pt->copyptr] = left;
|
|
idx = pt->copyptr + PT_SAMPLES/2;
|
|
idx %= PT_SAMPLES;
|
|
ptr[idx] = right;
|
|
}
|
|
|
|
static inline int pt_can_write(struct pt_data *pt)
|
|
{
|
|
return pt->blocks_copied < pt->blocks_played + 8;
|
|
}
|
|
|
|
static int pt_wait_for_write(struct emu10k1_wavedevice *wavedev, int nonblock)
|
|
{
|
|
struct emu10k1_card *card = wavedev->card;
|
|
struct pt_data *pt = &card->pt;
|
|
|
|
if (nonblock && !pt_can_write(pt))
|
|
return -EAGAIN;
|
|
while (!pt_can_write(pt) && pt->state != PT_STATE_INACTIVE) {
|
|
interruptible_sleep_on(&pt->wait);
|
|
if (signal_pending(current))
|
|
return -ERESTARTSYS;
|
|
}
|
|
if (pt->state == PT_STATE_INACTIVE)
|
|
return -EAGAIN;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pt_putblock(struct emu10k1_wavedevice *wave_dev, u16 *block, int nonblock)
|
|
{
|
|
struct woinst *woinst = wave_dev->woinst;
|
|
struct emu10k1_card *card = wave_dev->card;
|
|
struct pt_data *pt = &card->pt;
|
|
u16 *ptr = (u16 *) card->tankmem.addr;
|
|
int i = 0, r;
|
|
unsigned long flags;
|
|
|
|
r = pt_wait_for_write(wave_dev, nonblock);
|
|
if (r < 0)
|
|
return r;
|
|
spin_lock_irqsave(&card->pt.lock, flags);
|
|
while (i < PT_BLOCKSAMPLES) {
|
|
pt_putsamples(pt, ptr, block[2*i], block[2*i+1]);
|
|
if (pt->copyptr == 0)
|
|
pt->copyptr = PT_SAMPLES;
|
|
pt->copyptr--;
|
|
i++;
|
|
}
|
|
woinst->total_copied += PT_BLOCKSIZE;
|
|
pt->blocks_copied++;
|
|
if (pt->blocks_copied >= 4 && pt->state != PT_STATE_PLAYING) {
|
|
DPF(2, "activating digital pass-through playback\n");
|
|
sblive_writeptr(card, GPR_BASE + pt->enable_gpr, 0, 1);
|
|
pt->state = PT_STATE_PLAYING;
|
|
}
|
|
spin_unlock_irqrestore(&card->pt.lock, flags);
|
|
return 0;
|
|
}
|
|
|
|
int emu10k1_pt_setup(struct emu10k1_wavedevice *wave_dev)
|
|
{
|
|
u32 bits;
|
|
struct emu10k1_card *card = wave_dev->card;
|
|
struct pt_data *pt = &card->pt;
|
|
int i;
|
|
|
|
for (i = 0; i < 3; i++) {
|
|
pt->old_spcs[i] = sblive_readptr(card, SPCS0 + i, 0);
|
|
if (pt->spcs_to_use & (1 << i)) {
|
|
DPD(2, "using S/PDIF port %d\n", i);
|
|
bits = SPCS_CLKACCY_1000PPM | SPCS_SAMPLERATE_48 |
|
|
SPCS_CHANNELNUM_LEFT | SPCS_SOURCENUM_UNSPEC | SPCS_GENERATIONSTATUS |
|
|
0x00001200 | SPCS_EMPHASIS_NONE | SPCS_COPYRIGHT;
|
|
if (pt->ac3data)
|
|
bits |= SPCS_NOTAUDIODATA;
|
|
sblive_writeptr(card, SPCS0 + i, 0, bits);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
ssize_t emu10k1_pt_write(struct file *file, const char __user *buffer, size_t count)
|
|
{
|
|
struct emu10k1_wavedevice *wave_dev = (struct emu10k1_wavedevice *) file->private_data;
|
|
struct emu10k1_card *card = wave_dev->card;
|
|
struct pt_data *pt = &card->pt;
|
|
int nonblock, i, r, blocks, blocks_copied, bytes_copied = 0;
|
|
|
|
DPD(3, "emu10k1_pt_write(): %d bytes\n", count);
|
|
|
|
nonblock = file->f_flags & O_NONBLOCK;
|
|
|
|
if (card->tankmem.size < PT_SAMPLES*2)
|
|
return -EFAULT;
|
|
if (pt->state == PT_STATE_INACTIVE) {
|
|
DPF(2, "bufptr init\n");
|
|
pt->playptr = PT_SAMPLES-1;
|
|
pt->copyptr = PT_INITPTR;
|
|
pt->blocks_played = pt->blocks_copied = 0;
|
|
memset(card->tankmem.addr, 0, card->tankmem.size);
|
|
pt->state = PT_STATE_ACTIVATED;
|
|
pt->buf = kmalloc(PT_BLOCKSIZE, GFP_KERNEL);
|
|
pt->prepend_size = 0;
|
|
if (pt->buf == NULL)
|
|
return -ENOMEM;
|
|
emu10k1_pt_setup(wave_dev);
|
|
}
|
|
if (pt->prepend_size) {
|
|
int needed = PT_BLOCKSIZE - pt->prepend_size;
|
|
|
|
DPD(3, "prepend size %d, prepending %d bytes\n", pt->prepend_size, needed);
|
|
if (count < needed) {
|
|
if (copy_from_user(pt->buf + pt->prepend_size,
|
|
buffer, count))
|
|
return -EFAULT;
|
|
pt->prepend_size += count;
|
|
DPD(3, "prepend size now %d\n", pt->prepend_size);
|
|
return count;
|
|
}
|
|
if (copy_from_user(pt->buf + pt->prepend_size, buffer, needed))
|
|
return -EFAULT;
|
|
r = pt_putblock(wave_dev, (u16 *) pt->buf, nonblock);
|
|
if (r)
|
|
return r;
|
|
bytes_copied += needed;
|
|
pt->prepend_size = 0;
|
|
}
|
|
blocks = (count-bytes_copied)/PT_BLOCKSIZE;
|
|
blocks_copied = 0;
|
|
while (blocks > 0) {
|
|
u16 __user *bufptr = (u16 __user *) buffer + (bytes_copied/2);
|
|
if (copy_from_user(pt->buf, bufptr, PT_BLOCKSIZE))
|
|
return -EFAULT;
|
|
r = pt_putblock(wave_dev, (u16 *)pt->buf, nonblock);
|
|
if (r) {
|
|
if (bytes_copied)
|
|
return bytes_copied;
|
|
else
|
|
return r;
|
|
}
|
|
bytes_copied += PT_BLOCKSIZE;
|
|
blocks--;
|
|
blocks_copied++;
|
|
}
|
|
i = count - bytes_copied;
|
|
if (i) {
|
|
pt->prepend_size = i;
|
|
if (copy_from_user(pt->buf, buffer + bytes_copied, i))
|
|
return -EFAULT;
|
|
bytes_copied += i;
|
|
DPD(3, "filling prepend buffer with %d bytes", i);
|
|
}
|
|
return bytes_copied;
|
|
}
|
|
|
|
void emu10k1_pt_stop(struct emu10k1_card *card)
|
|
{
|
|
struct pt_data *pt = &card->pt;
|
|
int i;
|
|
|
|
if (pt->state != PT_STATE_INACTIVE) {
|
|
DPF(2, "digital pass-through stopped\n");
|
|
sblive_writeptr(card, (card->is_audigy ? A_GPR_BASE : GPR_BASE) + pt->enable_gpr, 0, 0);
|
|
for (i = 0; i < 3; i++) {
|
|
if (pt->spcs_to_use & (1 << i))
|
|
sblive_writeptr(card, SPCS0 + i, 0, pt->old_spcs[i]);
|
|
}
|
|
pt->state = PT_STATE_INACTIVE;
|
|
kfree(pt->buf);
|
|
}
|
|
}
|
|
|
|
void emu10k1_pt_waveout_update(struct emu10k1_wavedevice *wave_dev)
|
|
{
|
|
struct woinst *woinst = wave_dev->woinst;
|
|
struct pt_data *pt = &wave_dev->card->pt;
|
|
u32 pos;
|
|
|
|
if (pt->state == PT_STATE_PLAYING && pt->pos_gpr >= 0) {
|
|
pos = sblive_readptr(wave_dev->card, GPR_BASE + pt->pos_gpr, 0);
|
|
if (pos > PT_BLOCKSAMPLES)
|
|
pos = PT_BLOCKSAMPLES;
|
|
pos = 4 * (PT_BLOCKSAMPLES - pos);
|
|
} else
|
|
pos = 0;
|
|
woinst->total_played = pt->blocks_played * woinst->buffer.fragment_size + pos;
|
|
woinst->buffer.hw_pos = pos;
|
|
}
|
|
|