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/*
* Copyright 2019 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "audio_codec.h"
#include "hooks.h"
#include "memmap.h"
#include "registers.h"
#include "task.h"
#include "util.h"
/* VIF FIFO irq is triggered above this level */
#define WOV_TRIGGER_LEVEL 160
int audio_codec_wov_enable_notifier(void)
{
SCP_VIF_FIFO_DATA_THRE = WOV_TRIGGER_LEVEL + 1;
SCP_VIF_FIFO_EN |= VIF_FIFO_IRQ_EN;
task_enable_irq(SCP_IRQ_MAD_FIFO);
return EC_SUCCESS;
}
int audio_codec_wov_disable_notifier(void)
{
SCP_VIF_FIFO_EN &= ~VIF_FIFO_IRQ_EN;
task_disable_irq(SCP_IRQ_MAD_FIFO);
return EC_SUCCESS;
}
int audio_codec_wov_enable(void)
{
SCP_VIF_FIFO_EN = 0;
SCP_RXIF_CFG0 = (RXIF_CFG0_RESET_VAL & ~RXIF_RGDL2_MASK) |
RXIF_RGDL2_DMIC_16K;
SCP_RXIF_CFG1 = RXIF_CFG1_RESET_VAL;
SCP_VIF_FIFO_EN |= VIF_FIFO_RSTN;
return EC_SUCCESS;
}
int audio_codec_wov_disable(void)
{
SCP_VIF_FIFO_EN = 0;
return EC_SUCCESS;
}
static size_t wov_fifo_level(void)
{
uint32_t fifo_status = SCP_VIF_FIFO_STATUS;
if (!(fifo_status & VIF_FIFO_VALID))
return 0;
if (fifo_status & VIF_FIFO_FULL)
return VIF_FIFO_MAX;
return VIF_FIFO_LEVEL(fifo_status);
}
int32_t audio_codec_wov_read(void *buf, uint32_t count)
{
int16_t *out = buf;
count >>= 1;
while (count-- && wov_fifo_level())
*out++ = SCP_VIF_FIFO_DATA;
return (void *)out - buf;
}
static void wov_fifo_interrupt_handler(void)
{
#ifdef HAS_TASK_WOV
task_wake(TASK_ID_WOV);
#endif
audio_codec_wov_disable_notifier();
/* Read to clear */
SCP_VIF_FIFO_IRQ_STATUS;
}
DECLARE_IRQ(SCP_IRQ_MAD_FIFO, wov_fifo_interrupt_handler, 2);
int audio_codec_memmap_ap_to_ec(uintptr_t ap_addr, uintptr_t *ec_addr)
{
return memmap_ap_to_scp(ap_addr, ec_addr);
}
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