// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) by Jaroslav Kysela <[email protected]>
* Routines for control of GF1 chip (PCM things)
*
* InterWave chips supports interleaved DMA, but this feature isn't used in
* this code.
*
* This code emulates autoinit DMA transfer for playback, recording by GF1
* chip doesn't support autoinit DMA.
*/
#include <asm/dma.h>
#include <linux/slab.h>
#include <linux/sched/signal.h>
#include <sound/core.h>
#include <sound/control.h>
#include <sound/gus.h>
#include <sound/pcm_params.h>
#include "gus_tables.h"
/* maximum rate */
#define SNDRV_GF1_PCM_RATE 48000
#define SNDRV_GF1_PCM_PFLG_NONE 0
#define SNDRV_GF1_PCM_PFLG_ACTIVE (1<<0)
#define SNDRV_GF1_PCM_PFLG_NEUTRAL (2<<0)
struct gus_pcm_private {
struct snd_gus_card * gus;
struct snd_pcm_substream *substream;
spinlock_t lock;
unsigned int voices;
struct snd_gus_voice *pvoices[2];
unsigned int memory;
unsigned short flags;
unsigned char voice_ctrl, ramp_ctrl;
unsigned int bpos;
unsigned int blocks;
unsigned int block_size;
unsigned int dma_size;
wait_queue_head_t sleep;
atomic_t dma_count;
int final_volume;
};
static void snd_gf1_pcm_block_change_ack(struct snd_gus_card * gus, void *private_data)
{
struct gus_pcm_private *pcmp = private_data;
if (pcmp) {
atomic_dec(&pcmp->dma_count);
wake_up(&pcmp->sleep);
}
}
static int snd_gf1_pcm_block_change(struct snd_pcm_substream *substream,
unsigned int offset,
unsigned int addr,
unsigned int count)
{
struct snd_gf1_dma_block block;
struct snd_pcm_runtime *runtime = substream->runtime;
struct gus_pcm_private *pcmp = runtime->private_data;
count += offset & 31;
offset &= ~31;
memset(&block, 0, sizeof(block));
block.cmd = SNDRV_GF1_DMA_IRQ;
if (snd_pcm_format_unsigned(runtime->format))
block.cmd |= SNDRV_GF1_DMA_UNSIGNED;
if (snd_pcm_format_width(runtime->format) == 16)
block.cmd |= SNDRV_GF1_DMA_16BIT;
block.addr = addr & ~31;
block.buffer = runtime->dma_area + offset;
block.buf_addr = runtime->dma_addr + offset;
block.count = count;
block.private_data = pcmp;
block.ack = snd_gf1_pcm_block_change_ack;
if (!snd_gf1_dma_transfer_block(pcmp->gus, &block, 0, 0))
atomic_inc(&pcmp->dma_count);
return 0;
}
static void snd_gf1_pcm_trigger_up(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct gus_pcm_private *pcmp = runtime->private_data;
struct snd_gus_card * gus = pcmp->gus;
unsigned long flags;
unsigned char voice_ctrl, ramp_ctrl;
unsigned short rate;
unsigned int curr, begin, end;
unsigned short vol;
unsigned char pan;
unsigned int voice;
spin_lock_irqsave(&pcmp->lock, flags);
if (pcmp->flags & SNDRV_GF1_PCM_PFLG_ACTIVE) {
spin_unlock_irqrestore(&pcmp->lock, flags);
return;
}
pcmp->flags |= SNDRV_GF1_PCM_PFLG_ACTIVE;
pcmp->final_volume = 0;
spin_unlock_irqrestore(&pcmp->lock, flags);
rate = snd_gf1_translate_freq(gus, runtime->rate << 4);
/* enable WAVE IRQ */
voice_ctrl = snd_pcm_format_width(runtime->format) == 16 ? 0x24 : 0x20;
/* enable RAMP IRQ + rollover */
ramp_ctrl = 0x24;
if (pcmp->blocks == 1) {
voice_ctrl |= 0x08; /* loop enable */
ramp_ctrl &= ~0x04; /* disable rollover */
}
for (voice = 0; voice < pcmp->voices; voice++) {
begin = pcmp->memory + voice * (pcmp->dma_size / runtime->channels);
curr = begin + (pcmp->bpos * pcmp->block_size) / runtime->channels;
end = curr + (pcmp->block_size / runtime->channels);
end -= snd_pcm_format_width(runtime->format) == 16 ? 2 : 1;
pan = runtime->channels == 2 ? (!voice ? 1 : 14) : 8;
vol = !voice ? gus->gf1.pcm_volume_level_left : gus->gf1.pcm_volume_level_right;
spin_lock_irqsave(&gus->reg_lock, flags);
snd_gf1_select_voice(gus, pcmp->pvoices[voice]->number);
snd_gf1_write8(gus, SNDRV_GF1_VB_PAN, pan);
snd_gf1_write16(gus, SNDRV_GF1_VW_FREQUENCY, rate);
snd_gf1_write_addr(gus, SNDRV_GF1_VA_START, begin << 4, voice_ctrl & 4);
snd_gf1_write_addr(gus, SNDRV_GF1_VA_END, end << 4, voice_ctrl & 4);
snd_gf1_write_addr(gus, SNDRV_GF1_VA_CURRENT, curr << 4, voice_ctrl & 4);
snd_gf1_write16(gus, SNDRV_GF1_VW_VOLUME, SNDRV_GF1_MIN_VOLUME << 4);
snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_RATE, 0x2f);
snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_START, SNDRV_GF1_MIN_OFFSET);
snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_END, vol >> 8);
snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_CONTROL, ramp_ctrl);
if (!gus->gf1.enh_mode) {
snd_gf1_delay(gus);
snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_CONTROL, ramp_ctrl);
}
spin_unlock_irqrestore(&gus->reg_lock, flags);
}
spin_lock_irqsave(&gus->reg_lock, flags);
for (voice = 0; voice < pcmp->voices; voice++) {
snd_gf1_select_voice(gus, pcmp->pvoices[voice]->number);
if (gus->gf1.enh_mode)
snd_gf1_write8(gus, SNDRV_GF1_VB_MODE, 0x00); /* deactivate voice */
snd_gf1_write8(gus, SNDRV_GF1_VB_ADDRESS_CONTROL, voice_ctrl);
voice_ctrl &= ~0x20;
}
voice_ctrl |= 0x20;
if (!gus->gf1.enh_mode) {
snd_gf1_delay(gus);
for (voice = 0; voice < pcmp->voices; voice++) {
snd_gf1_select_voice(gus, pcmp->pvoices[voice]->number);
snd_gf1_write8(gus, SNDRV_GF1_VB_ADDRESS_CONTROL, voice_ctrl);
voice_ctrl &= ~0x20; /* disable IRQ for next voice */
}
}
spin_unlock_irqrestore(&gus->reg_lock, flags);
}
static void snd_gf1_pcm_interrupt_wave(struct snd_gus_card * gus,
struct snd_gus_voice *pvoice)
{
struct gus_pcm_private * pcmp;
struct snd_pcm_runtime *runtime;
unsigned char voice_ctrl, ramp_ctrl;
unsigned int idx;
unsigned int end, step;
if (!pvoice->private_data) {
dev_dbg(gus->card->dev, "%s: unknown wave irq?\n", __func__);
snd_gf1_smart_stop_voice(gus, pvoice->number);
return;
}
pcmp = pvoice->private_data;
if (pcmp == NULL) {
dev_dbg(gus->card->dev, "%s: unknown wave irq?\n", __func__);
snd_gf1_smart_stop_voice(gus, pvoice->number);
return;
}
gus = pcmp->gus;
runtime = pcmp->substream->runtime;
spin_lock(&gus->reg_lock);
snd_gf1_select_voice(gus, pvoice->number);
voice_ctrl = snd_gf1_read8(gus, SNDRV_GF1_VB_ADDRESS_CONTROL) & ~0x8b;
ramp_ctrl = (snd_gf1_read8(gus, SNDRV_GF1_VB_VOLUME_CONTROL) & ~0xa4) | 0x03;
#if 0
snd_gf1_select_voice(gus, pvoice->number);
dev_dbg(gus->card->dev, "position = 0x%x\n",
(snd_gf1_read_addr(gus, SNDRV_GF1_VA_CURRENT, voice_ctrl & 4) >> 4));
snd_gf1_select_voice(gus, pcmp->pvoices[1]->number);
dev_dbg(gus->card->dev, "position = 0x%x\n",
(snd_gf1_read_addr(gus, SNDRV_GF1_VA_CURRENT, voice_ctrl & 4) >> 4));
snd_gf1_select_voice(gus, pvoice->number);
#endif
pcmp->bpos++;
pcmp->bpos %= pcmp->blocks;
if (pcmp->bpos + 1 >= pcmp->blocks) { /* last block? */
voice_ctrl |= 0x08; /* enable loop */
} else {
ramp_ctrl |= 0x04; /* enable rollover */
}
end = pcmp->memory + (((pcmp->bpos + 1) * pcmp->block_size) / runtime->channels);
end -= voice_ctrl & 4 ? 2 : 1;
step = pcmp->dma_size / runtime->channels;
voice_ctrl |= 0x20;
if (!pcmp->final_volume) {
ramp_ctrl |= 0x20;
ramp_ctrl &= ~0x03;
}
for (idx = 0; idx < pcmp->voices; idx++, end += step) {
snd_gf1_select_voice(gus, pcmp->pvoices[idx]->number);
snd_gf1_write_addr(gus, SNDRV_GF1_VA_END, end << 4, voice_ctrl & 4);
snd_gf1_write8(gus, SNDRV_GF1_VB_ADDRESS_CONTROL, voice_ctrl);
snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_CONTROL, ramp_ctrl);
voice_ctrl &= ~0x20;
}
if (!gus->gf1.enh_mode) {
snd_gf1_delay(gus);
voice_ctrl |= 0x20;
for (idx = 0; idx < pcmp->voices; idx++) {
snd_gf1_select_voice(gus, pcmp->pvoices[idx]->number);
snd_gf1_write8(gus, SNDRV_GF1_VB_ADDRESS_CONTROL, voice_ctrl);
snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_CONTROL, ramp_ctrl);
voice_ctrl &= ~0x20;
}
}
spin_unlock(&gus->reg_lock);
snd_pcm_period_elapsed(pcmp->substream);
#if 0
if ((runtime->flags & SNDRV_PCM_FLG_MMAP) &&
*runtime->state == SNDRV_PCM_STATE_RUNNING) {
end = pcmp->bpos * pcmp->block_size;
if (runtime->channels > 1) {
snd_gf1_pcm_block_change(pcmp->substream, end, pcmp->memory + (end / 2), pcmp->block_size / 2);
snd_gf1_pcm_block_change(pcmp->substream, end + (pcmp->block_size / 2), pcmp->memory + (pcmp->dma_size / 2) + (end / 2), pcmp->block_size / 2);
} else {
snd_gf1_pcm_block_change(pcmp->substream, end, pcmp->memory + end, pcmp->block_size);
}
}
#endif
}
static void snd_gf1_pcm_interrupt_volume(struct snd_gus_card * gus,
struct snd_gus_voice * pvoice)
{
unsigned short vol;
int cvoice;
struct gus_pcm_private *pcmp = pvoice->private_data;
/* stop ramp, but leave rollover bit untouched */
spin_lock(&gus->reg_lock);
snd_gf1_select_voice(gus, pvoice->number);
snd_gf1_ctrl_stop(gus, SNDRV_GF1_VB_VOLUME_CONTROL);
spin_unlock(&gus->reg_lock);
if (pcmp == NULL)
return;
/* are we active? */
if (!(pcmp->flags & SNDRV_GF1_PCM_PFLG_ACTIVE))
return;
/* load real volume - better precision */
cvoice = pcmp->pvoices[0] == pvoice ? 0 : 1;
if (pcmp->substream == NULL)
return;
vol = !cvoice ? gus->gf1.pcm_volume_level_left : gus->gf1.pcm_volume_level_right;
spin_lock(&gus->reg_lock);
snd_gf1_select_voice(gus, pvoice->number);
snd_gf1_write16(gus, SNDRV_GF1_VW_VOLUME, vol);
pcmp->final_volume = 1;
spin_unlock(&gus->reg_lock);
}
static void snd_gf1_pcm_volume_change(struct snd_gus_card * gus)
{
}
static int snd_gf1_pcm_poke_block(struct snd_gus_card *gus, unsigned char *buf,
unsigned int pos, unsigned int count,
int w16, int invert)
{
unsigned int len;
unsigned long flags;
while (count > 0) {
len = count;
if (len > 512) /* limit, to allow IRQ */
len = 512;
count -= len;
if (gus->interwave) {
spin_lock_irqsave(&gus->reg_lock, flags);
snd_gf1_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, 0x01 | (invert ? 0x08 : 0x00));
snd_gf1_dram_addr(gus, pos);
if (w16) {
outb(SNDRV_GF1_GW_DRAM_IO16, GUSP(gus, GF1REGSEL));
outsw(GUSP(gus, GF1DATALOW), buf, len >> 1);
} else {
outsb(GUSP(gus, DRAM), buf, len);
}
spin_unlock_irqrestore(&gus->reg_lock, flags);
buf += 512;
pos += 512;
} else {
invert = invert ? 0x80 : 0x00;
if (w16) {
len >>= 1;
while (len--) {
snd_gf1_poke(gus, pos++, *buf++);
snd_gf1_poke(gus, pos++, *buf++ ^ invert);
}
} else {
while (len--)
snd_gf1_poke(gus, pos++, *buf++ ^ invert);
}
}
if (count > 0 && !in_interrupt()) {
schedule_timeout_interruptible(1);
if (signal_pending(current))
return -EAGAIN;
}
}
return 0;
}
static int get_bpos(struct gus_pcm_private *pcmp, int voice, unsigned int pos,
unsigned int len)
{
unsigned int bpos = pos + (voice * (pcmp->dma_size / 2));
if (snd_BUG_ON(bpos > pcmp->dma_size))
return -EIO;
if (snd_BUG_ON(bpos + len > pcmp->dma_size))
return -EIO;
return bpos;
}
static int playback_copy_ack(struct snd_pcm_substream *substream,
unsigned int bpos, unsigned int len)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct gus_pcm_private *pcmp = runtime->private_data;
struct snd_gus_card *gus = pcmp->gus;
int w16, invert;
if (len > 32)
return snd_gf1_pcm_block_change(substream, bpos,
pcmp->memory + bpos, len);
w16 = (snd_pcm_format_width(runtime->format) == 16);
invert = snd_pcm_format_unsigned(runtime->format);
return snd_gf1_pcm_poke_block(gus, runtime->dma_area + bpos,
pcmp->memory + bpos, len, w16, invert);
}
static int snd_gf1_pcm_playback_copy(struct snd_pcm_substream *substream,
int voice, unsigned long pos,
struct iov_iter *src, unsigned long count)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct gus_pcm_private *pcmp = runtime->private_data;
unsigned int len = count;
int bpos;
bpos = get_bpos(pcmp, voice, pos, len);
if (bpos < 0)
return bpos;
if (copy_from_iter(runtime->dma_area + bpos, len, src) != len)
return -EFAULT;
return playback_copy_ack(substream, bpos, len);
}
static int snd_gf1_pcm_playback_silence(struct snd_pcm_substream *substream,
int voice, unsigned long pos,
unsigned long count)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct gus_pcm_private *pcmp = runtime->private_data;
unsigned int len = count;
int bpos;
bpos = get_bpos(pcmp, voice, pos, len);
if (bpos < 0)
return bpos;
snd_pcm_format_set_silence(runtime->format, runtime->dma_area + bpos,
bytes_to_samples(runtime, count));
return playback_copy_ack(substream, bpos, len);
}
static int snd_gf1_pcm_playback_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params)
{
struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
struct gus_pcm_private *pcmp = runtime->private_data;
if (runtime->buffer_changed) {
struct snd_gf1_mem_block *block;
if (pcmp->memory > 0) {
snd_gf1_mem_free(&gus->gf1.mem_alloc, pcmp->memory);
pcmp->memory = 0;
}
block = snd_gf1_mem_alloc(&gus->gf1.mem_alloc,
SNDRV_GF1_MEM_OWNER_DRIVER,
"GF1 PCM",
runtime->dma_bytes, 1, 32,
NULL);
if (!block)
return -ENOMEM;
pcmp->memory = block->ptr;
}
pcmp->voices = params_channels(hw_params);
if (pcmp->pvoices[0] == NULL) {
pcmp->pvoices[0] = snd_gf1_alloc_voice(pcmp->gus, SNDRV_GF1_VOICE_TYPE_PCM, 0, 0);
if (!pcmp->pvoices[0])
return -ENOMEM;
pcmp->pvoices[0]->handler_wave = snd_gf1_pcm_interrupt_wave;
pcmp->pvoices[0]->handler_volume = snd_gf1_pcm_interrupt_volume;
pcmp->pvoices[0]->volume_change = snd_gf1_pcm_volume_change;
pcmp->pvoices[0]->private_data = pcmp;
}
if (pcmp->voices > 1 && pcmp->pvoices[1] == NULL) {
pcmp->pvoices[1] = snd_gf1_alloc_voice(pcmp->gus, SNDRV_GF1_VOICE_TYPE_PCM, 0, 0);
if (!pcmp->pvoices[1])
return -ENOMEM;
pcmp->pvoices[1]->handler_wave = snd_gf1_pcm_interrupt_wave;
pcmp->pvoices[1]->handler_volume = snd_gf1_pcm_interrupt_volume;
pcmp->pvoices[1]->volume_change = snd_gf1_pcm_volume_change;
pcmp->pvoices[1]->private_data = pcmp;
} else if (pcmp->voices == 1) {
if (pcmp->pvoices[1]) {
snd_gf1_free_voice(pcmp->gus, pcmp->pvoices[1]);
pcmp->pvoices[1] = NULL;
}
}
return 0;
}
static int snd_gf1_pcm_playback_hw_free(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct gus_pcm_private *pcmp = runtime->private_data;
if (pcmp->pvoices[0]) {
snd_gf1_free_voice(pcmp->gus, pcmp->pvoices[0]);
pcmp->pvoices[0] = NULL;
}
if (pcmp->pvoices[1]) {
snd_gf1_free_voice(pcmp->gus, pcmp->pvoices[1]);
pcmp->pvoices[1] = NULL;
}
if (pcmp->memory > 0) {
snd_gf1_mem_free(&pcmp->gus->gf1.mem_alloc, pcmp->memory);
pcmp->memory = 0;
}
return 0;
}
static int snd_gf1_pcm_playback_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct gus_pcm_private *pcmp = runtime->private_data;
pcmp->bpos = 0;
pcmp->dma_size = snd_pcm_lib_buffer_bytes(substream);
pcmp->block_size = snd_pcm_lib_period_bytes(substream);
pcmp->blocks = pcmp->dma_size / pcmp->block_size;
return 0;
}
static int snd_gf1_pcm_playback_trigger(struct snd_pcm_substream *substream,
int cmd)
{
struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
struct gus_pcm_private *pcmp = runtime->private_data;
int voice;
if (cmd == SNDRV_PCM_TRIGGER_START) {
snd_gf1_pcm_trigger_up(substream);
} else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
spin_lock(&pcmp->lock);
pcmp->flags &= ~SNDRV_GF1_PCM_PFLG_ACTIVE;
spin_unlock(&pcmp->lock);
voice = pcmp->pvoices[0]->number;
snd_gf1_stop_voices(gus, voice, voice);
if (pcmp->pvoices[1]) {
voice = pcmp->pvoices[1]->number;
snd_gf1_stop_voices(gus, voice, voice);
}
} else {
return -EINVAL;
}
return 0;
}
static snd_pcm_uframes_t snd_gf1_pcm_playback_pointer(struct snd_pcm_substream *substream)
{
struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
struct gus_pcm_private *pcmp = runtime->private_data;
unsigned int pos;
unsigned char voice_ctrl;
pos = 0;
spin_lock(&gus->reg_lock);
if (pcmp->flags & SNDRV_GF1_PCM_PFLG_ACTIVE) {
snd_gf1_select_voice(gus, pcmp->pvoices[0]->number);
voice_ctrl = snd_gf1_read8(gus, SNDRV_GF1_VB_ADDRESS_CONTROL);
pos = (snd_gf1_read_addr(gus, SNDRV_GF1_VA_CURRENT, voice_ctrl & 4) >> 4) - pcmp->memory;
if (substream->runtime->channels > 1)
pos <<= 1;
pos = bytes_to_frames(runtime, pos);
}
spin_unlock(&gus->reg_lock);
return pos;
}
static const struct snd_ratnum clock = {
.num = 9878400/16,
.den_min = 2,
.den_max = 257,
.den_step = 1,
};
static const struct snd_pcm_hw_constraint_ratnums hw_constraints_clocks = {
.nrats = 1,
.rats = &clock,
};
static int snd_gf1_pcm_capture_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params)
{
struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
gus->c_dma_size = params_buffer_bytes(hw_params);
gus->c_period_size = params_period_bytes(hw_params);
gus->c_pos = 0;
gus->gf1.pcm_rcntrl_reg = 0x21; /* IRQ at end, enable & start */
if (params_channels(hw_params) > 1)
gus->gf1.pcm_rcntrl_reg |= 2;
if (gus->gf1.dma2 > 3)
gus->gf1.pcm_rcntrl_reg |= 4;
if (snd_pcm_format_unsigned(params_format(hw_params)))
gus->gf1.pcm_rcntrl_reg |= 0x80;
return 0;
}
static int snd_gf1_pcm_capture_prepare(struct snd_pcm_substream *substream)
{
struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
snd_gf1_i_write8(gus, SNDRV_GF1_GB_RECORD_RATE, runtime->rate_den - 2);
snd_gf1_i_write8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL, 0); /* disable sampling */
snd_gf1_i_look8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL); /* Sampling Control Register */
snd_dma_program(gus->gf1.dma2, runtime->dma_addr, gus->c_period_size, DMA_MODE_READ);
return 0;
}
static int snd_gf1_pcm_capture_trigger(struct snd_pcm_substream *substream,
int cmd)
{
struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
int val;
if (cmd == SNDRV_PCM_TRIGGER_START) {
val = gus->gf1.pcm_rcntrl_reg;
} else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
val = 0;
} else {
return -EINVAL;
}
spin_lock(&gus->reg_lock);
snd_gf1_write8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL, val);
snd_gf1_look8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL);
spin_unlock(&gus->reg_lock);
return 0;
}
static snd_pcm_uframes_t snd_gf1_pcm_capture_pointer(struct snd_pcm_substream *substream)
{
struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
int pos = snd_dma_pointer(gus->gf1.dma2, gus->c_period_size);
pos = bytes_to_frames(substream->runtime, (gus->c_pos + pos) % gus->c_dma_size);
return pos;
}
static void snd_gf1_pcm_interrupt_dma_read(struct snd_gus_card * gus)
{
snd_gf1_i_write8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL, 0); /* disable sampling */
snd_gf1_i_look8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL); /* Sampling Control Register */
if (gus->pcm_cap_substream != NULL) {
snd_gf1_pcm_capture_prepare(gus->pcm_cap_substream);
snd_gf1_pcm_capture_trigger(gus->pcm_cap_substream, SNDRV_PCM_TRIGGER_START);
gus->c_pos += gus->c_period_size;
snd_pcm_period_elapsed(gus->pcm_cap_substream);
}
}
static const struct snd_pcm_hardware snd_gf1_pcm_playback =
{
.info = SNDRV_PCM_INFO_NONINTERLEAVED,
.formats = (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |
SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE),
.rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
.rate_min = 5510,
.rate_max = 48000,
.channels_min = 1,
.channels_max = 2,
.buffer_bytes_max = (128*1024),
.period_bytes_min = 64,
.period_bytes_max = (128*1024),
.periods_min = 1,
.periods_max = 1024,
.fifo_size = 0,
};
static const struct snd_pcm_hardware snd_gf1_pcm_capture =
{
.info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_MMAP_VALID),
.formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8,
.rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_44100,
.rate_min = 5510,
.rate_max = 44100,
.channels_min = 1,
.channels_max = 2,
.buffer_bytes_max = (128*1024),
.period_bytes_min = 64,
.period_bytes_max = (128*1024),
.periods_min = 1,
.periods_max = 1024,
.fifo_size = 0,
};
static void snd_gf1_pcm_playback_free(struct snd_pcm_runtime *runtime)
{
kfree(runtime->private_data);
}
static int snd_gf1_pcm_playback_open(struct snd_pcm_substream *substream)
{
struct gus_pcm_private *pcmp;
struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
int err;
pcmp = kzalloc(sizeof(*pcmp), GFP_KERNEL);
if (pcmp == NULL)
return -ENOMEM;
pcmp->gus = gus;
spin_lock_init(&pcmp->lock);
init_waitqueue_head(&pcmp->sleep);
atomic_set(&pcmp->dma_count, 0);
runtime->private_data = pcmp;
runtime->private_free = snd_gf1_pcm_playback_free;
#if 0
dev_dbg(gus->card->dev,
"playback.buffer = 0x%lx, gf1.pcm_buffer = 0x%lx\n",
(long) pcm->playback.buffer, (long) gus->gf1.pcm_buffer);
#endif
err = snd_gf1_dma_init(gus);
if (err < 0)
return err;
pcmp->flags = SNDRV_GF1_PCM_PFLG_NONE;
pcmp->substream = substream;
runtime->hw = snd_gf1_pcm_playback;
snd_pcm_limit_isa_dma_size(gus->gf1.dma1, &runtime->hw.buffer_bytes_max);
snd_pcm_limit_isa_dma_size(gus->gf1.dma1, &runtime->hw.period_bytes_max);
snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 64);
return 0;
}
static int snd_gf1_pcm_playback_close(struct snd_pcm_substream *substream)
{
struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
struct gus_pcm_private *pcmp = runtime->private_data;
if (!wait_event_timeout(pcmp->sleep, (atomic_read(&pcmp->dma_count) <= 0), 2*HZ))
dev_err(gus->card->dev, "gf1 pcm - serious DMA problem\n");
snd_gf1_dma_done(gus);
return 0;
}
static int snd_gf1_pcm_capture_open(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
gus->gf1.interrupt_handler_dma_read = snd_gf1_pcm_interrupt_dma_read;
gus->pcm_cap_substream = substream;
substream->runtime->hw = snd_gf1_pcm_capture;
snd_pcm_limit_isa_dma_size(gus->gf1.dma2, &runtime->hw.buffer_bytes_max);
snd_pcm_limit_isa_dma_size(gus->gf1.dma2, &runtime->hw.period_bytes_max);
snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
&hw_constraints_clocks);
return 0;
}
static int snd_gf1_pcm_capture_close(struct snd_pcm_substream *substream)
{
struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
gus->pcm_cap_substream = NULL;
snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_DMA_READ);
return 0;
}
static int snd_gf1_pcm_volume_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 2;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = 127;
return 0;
}
static int snd_gf1_pcm_volume_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
struct snd_gus_card *gus = snd_kcontrol_chip(kcontrol);
unsigned long flags;
spin_lock_irqsave(&gus->pcm_volume_level_lock, flags);
ucontrol->value.integer.value[0] = gus->gf1.pcm_volume_level_left1;
ucontrol->value.integer.value[1] = gus->gf1.pcm_volume_level_right1;
spin_unlock_irqrestore(&gus->pcm_volume_level_lock, flags);
return 0;
}
static int snd_gf1_pcm_volume_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
struct snd_gus_card *gus = snd_kcontrol_chip(kcontrol);
unsigned long flags;
int change;
unsigned int idx;
unsigned short val1, val2, vol;
struct gus_pcm_private *pcmp;
struct snd_gus_voice *pvoice;
val1 = ucontrol->value.integer.value[0] & 127;
val2 = ucontrol->value.integer.value[1] & 127;
spin_lock_irqsave(&gus->pcm_volume_level_lock, flags);
change = val1 != gus->gf1.pcm_volume_level_left1 ||
val2 != gus->gf1.pcm_volume_level_right1;
gus->gf1.pcm_volume_level_left1 = val1;
gus->gf1.pcm_volume_level_right1 = val2;
gus->gf1.pcm_volume_level_left = snd_gf1_lvol_to_gvol_raw(val1 << 9) << 4;
gus->gf1.pcm_volume_level_right = snd_gf1_lvol_to_gvol_raw(val2 << 9) << 4;
spin_unlock_irqrestore(&gus->pcm_volume_level_lock, flags);
/* are we active? */
spin_lock_irqsave(&gus->voice_alloc, flags);
for (idx = 0; idx < 32; idx++) {
pvoice = &gus->gf1.voices[idx];
if (!pvoice->pcm)
continue;
pcmp = pvoice->private_data;
if (!(pcmp->flags & SNDRV_GF1_PCM_PFLG_ACTIVE))
continue;
/* load real volume - better precision */
spin_lock(&gus->reg_lock);
snd_gf1_select_voice(gus, pvoice->number);
snd_gf1_ctrl_stop(gus, SNDRV_GF1_VB_VOLUME_CONTROL);
vol = pvoice == pcmp->pvoices[0] ? gus->gf1.pcm_volume_level_left : gus->gf1.pcm_volume_level_right;
snd_gf1_write16(gus, SNDRV_GF1_VW_VOLUME, vol);
pcmp->final_volume = 1;
spin_unlock(&gus->reg_lock);
}
spin_unlock_irqrestore(&gus->voice_alloc, flags);
return change;
}
static const struct snd_kcontrol_new snd_gf1_pcm_volume_control =
{
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "PCM Playback Volume",
.info = snd_gf1_pcm_volume_info,
.get = snd_gf1_pcm_volume_get,
.put = snd_gf1_pcm_volume_put
};
static const struct snd_kcontrol_new snd_gf1_pcm_volume_control1 =
{
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "GPCM Playback Volume",
.info = snd_gf1_pcm_volume_info,
.get = snd_gf1_pcm_volume_get,
.put = snd_gf1_pcm_volume_put
};
static const struct snd_pcm_ops snd_gf1_pcm_playback_ops = {
.open = snd_gf1_pcm_playback_open,
.close = snd_gf1_pcm_playback_close,
.hw_params = snd_gf1_pcm_playback_hw_params,
.hw_free = snd_gf1_pcm_playback_hw_free,
.prepare = snd_gf1_pcm_playback_prepare,
.trigger = snd_gf1_pcm_playback_trigger,
.pointer = snd_gf1_pcm_playback_pointer,
.copy = snd_gf1_pcm_playback_copy,
.fill_silence = snd_gf1_pcm_playback_silence,
};
static const struct snd_pcm_ops snd_gf1_pcm_capture_ops = {
.open = snd_gf1_pcm_capture_open,
.close = snd_gf1_pcm_capture_close,
.hw_params = snd_gf1_pcm_capture_hw_params,
.prepare = snd_gf1_pcm_capture_prepare,
.trigger = snd_gf1_pcm_capture_trigger,
.pointer = snd_gf1_pcm_capture_pointer,
};
int snd_gf1_pcm_new(struct snd_gus_card *gus, int pcm_dev, int control_index)
{
struct snd_card *card;
struct snd_kcontrol *kctl;
struct snd_pcm *pcm;
struct snd_pcm_substream *substream;
int capture, err;
card = gus->card;
capture = !gus->interwave && !gus->ess_flag && !gus->ace_flag ? 1 : 0;
err = snd_pcm_new(card,
gus->interwave ? "AMD InterWave" : "GF1",
pcm_dev,
gus->gf1.pcm_channels / 2,
capture,
&pcm);
if (err < 0)
return err;
pcm->private_data = gus;
/* playback setup */
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_gf1_pcm_playback_ops);
for (substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; substream; substream = substream->next)
snd_pcm_set_managed_buffer(substream, SNDRV_DMA_TYPE_DEV,
card->dev,
64*1024, gus->gf1.dma1 > 3 ? 128*1024 : 64*1024);
pcm->info_flags = 0;
pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX;
if (capture) {
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_gf1_pcm_capture_ops);
if (gus->gf1.dma2 == gus->gf1.dma1)
pcm->info_flags |= SNDRV_PCM_INFO_HALF_DUPLEX;
snd_pcm_set_managed_buffer(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream,
SNDRV_DMA_TYPE_DEV, card->dev,
64*1024, gus->gf1.dma2 > 3 ? 128*1024 : 64*1024);
}
strcpy(pcm->name, pcm->id);
if (gus->interwave) {
sprintf(pcm->name + strlen(pcm->name), " rev %c", gus->revision + 'A');
}
strcat(pcm->name, " (synth)");
gus->pcm = pcm;
if (gus->codec_flag)
kctl = snd_ctl_new1(&snd_gf1_pcm_volume_control1, gus);
else
kctl = snd_ctl_new1(&snd_gf1_pcm_volume_control, gus);
kctl->id.index = control_index;
err = snd_ctl_add(card, kctl);
if (err < 0)
return err;
return 0;
}
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