| // Copyright 2019 The Fuchsia 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 <limits> |
| #include <utility> |
| |
| #include <ddk/debug.h> |
| #include <fbl/alloc_checker.h> |
| #include <soc/mt8167/mt8167-audio-out.h> |
| #include <soc/mt8167/mt8167-audio-regs.h> |
| |
| std::unique_ptr<MtAudioOutDevice> MtAudioOutDevice::Create(ddk::MmioBuffer mmio, MtI2sCh ch) { |
| uint32_t fifo_depth = 36 * 1024; // in bytes. |
| |
| // TODO(andresoportus): Support other configurations. |
| if (ch != I2S2) { |
| return nullptr; |
| } |
| |
| fbl::AllocChecker ac; |
| auto dev = |
| std::unique_ptr<MtAudioOutDevice>(new (&ac) MtAudioOutDevice(std::move(mmio), fifo_depth)); |
| if (!ac.check()) { |
| return nullptr; |
| } |
| |
| dev->InitRegs(); |
| return dev; |
| } |
| |
| void MtAudioOutDevice::InitRegs() { |
| // Enable the AFE module. |
| AFE_DAC_CON0::Get().ReadFrom(&mmio_).set_AFE_ON(1).WriteTo(&mmio_); |
| |
| // Power up the AFE module by clearing the power down bit. |
| AUDIO_TOP_CON0::Get().ReadFrom(&mmio_).set_PDN_AFE(0).WriteTo(&mmio_); |
| |
| // I2S mode 48k, DL1 stereo, DL1 mode 48k. |
| auto dac_con1 = AFE_DAC_CON1::Get().ReadFrom(&mmio_); |
| dac_con1.set_DL1_DATA(0).set_DL1_MODE(10).WriteTo(&mmio_); |
| |
| // Disable clock gating. |
| AUDIO_TOP_CON1::Get().ReadFrom(&mmio_).set_I2S2_BCLK_SW_CG(0).WriteTo(&mmio_); |
| |
| // I2S2: Enable, I2S (not EIAJ), 16/32 bits, OUT_MODE set to 48k, and TDMOUT PAD set to I2S. |
| constexpr bool is_32_bits = 1; |
| constexpr uint32_t out_mode_48k = 10; |
| auto i2s_con1 = AFE_I2S_CON1::Get().ReadFrom(&mmio_); |
| i2s_con1.set_I2S2_EN(1).set_I2S2_FMT(1).set_I2S2_WLEN(is_32_bits); |
| i2s_con1.set_I2S2_OUT_MODE(out_mode_48k); |
| i2s_con1.set_I2S2_TDMOUT_MUX(1); |
| i2s_con1.WriteTo(&mmio_); |
| |
| // Enable path from DL1 data to I2S/DL_SRC. |
| AFE_CONN1::Get().ReadFrom(&mmio_).set_I05_O03_S(1).WriteTo(&mmio_); |
| AFE_CONN2::Get().ReadFrom(&mmio_).set_I06_O04_S(1).WriteTo(&mmio_); |
| |
| // Disable 24 bits. |
| AFE_CONN_24BIT::Get().ReadFrom(&mmio_).set_O03_24BIT(0).WriteTo(&mmio_); |
| AFE_CONN_24BIT::Get().ReadFrom(&mmio_).set_O04_24BIT(0).WriteTo(&mmio_); |
| } |
| |
| uint32_t MtAudioOutDevice::GetRingPosition() { |
| return AFE_DL1_CUR::Get().ReadFrom(&mmio_).reg_value() - |
| AFE_DL1_BASE::Get().ReadFrom(&mmio_).reg_value(); |
| } |
| |
| zx_status_t MtAudioOutDevice::SetBuffer(zx_paddr_t buf, size_t len) { |
| if ((buf % 16) || ((buf + len - 1) > std::numeric_limits<uint32_t>::max()) || (len < 16) || |
| (len % 16)) { |
| return ZX_ERR_INVALID_ARGS; |
| } |
| |
| // End is inclusive. |
| AFE_DL1_BASE::Get().FromValue(static_cast<uint32_t>(buf)).WriteTo(&mmio_); |
| AFE_DL1_END::Get().FromValue(static_cast<uint32_t>(buf + len - 1)).WriteTo(&mmio_); |
| return ZX_OK; |
| } |
| |
| uint64_t MtAudioOutDevice::Start() { |
| AFE_DAC_CON0::Get().ReadFrom(&mmio_).set_DL1_ON(1).WriteTo(&mmio_); |
| return 0; |
| } |
| |
| void MtAudioOutDevice::Stop() { |
| AFE_DAC_CON0::Get().ReadFrom(&mmio_).set_DL1_ON(0).WriteTo(&mmio_); |
| } |
| |
| void MtAudioOutDevice::Shutdown() { |
| Stop(); |
| // Disable the AFE module. |
| AFE_DAC_CON0::Get().ReadFrom(&mmio_).set_AFE_ON(0).WriteTo(&mmio_); |
| } |