| // Copyright 2018 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 "audio-stream-in.h" |
| |
| #include <ddk/binding.h> |
| #include <ddk/debug.h> |
| #include <ddk/driver.h> |
| #include <ddk/platform-defs.h> |
| #include <math.h> |
| |
| #include <optional> |
| #include <utility> |
| |
| namespace audio { |
| namespace sherlock { |
| |
| // Expects 2 mics. |
| constexpr size_t kNumberOfChannels = 2; |
| // Calculate ring buffer size for 1 second of 16-bit, 48kHz. |
| constexpr size_t kRingBufferSize = fbl::round_up<size_t, size_t>(48000 * 2 * kNumberOfChannels, |
| ZX_PAGE_SIZE); |
| |
| SherlockAudioStreamIn::SherlockAudioStreamIn(zx_device_t* parent) |
| : SimpleAudioStream(parent, true /* is input */) { |
| } |
| |
| zx_status_t SherlockAudioStreamIn::Init() { |
| zx_status_t status; |
| |
| status = InitPDev(); |
| if (status != ZX_OK) { |
| return status; |
| } |
| |
| status = AddFormats(); |
| if (status != ZX_OK) { |
| return status; |
| } |
| // Set our gain capabilities. |
| cur_gain_state_.cur_gain = 0; |
| cur_gain_state_.cur_mute = false; |
| cur_gain_state_.cur_agc = false; |
| cur_gain_state_.min_gain = 0; |
| cur_gain_state_.max_gain = 0; |
| cur_gain_state_.gain_step = 0; |
| cur_gain_state_.can_mute = false; |
| cur_gain_state_.can_agc = false; |
| |
| snprintf(device_name_, sizeof(device_name_), "sherlock-audio-in"); |
| snprintf(mfr_name_, sizeof(mfr_name_), "unknown"); |
| snprintf(prod_name_, sizeof(prod_name_), "sherlock"); |
| |
| unique_id_ = AUDIO_STREAM_UNIQUE_ID_BUILTIN_MICROPHONE; |
| |
| return ZX_OK; |
| } |
| |
| zx_status_t SherlockAudioStreamIn::InitPDev() { |
| pdev_protocol_t pdev; |
| zx_status_t status = device_get_protocol(parent(), ZX_PROTOCOL_PDEV, &pdev); |
| if (status) { |
| return status; |
| } |
| pdev_ = ddk::PDev(&pdev); |
| |
| status = pdev_->GetBti(0, &bti_); |
| if (status != ZX_OK) { |
| zxlogf(ERROR, "%s could not obtain bti - %d\n", __func__, status); |
| return status; |
| } |
| std::optional<ddk::MmioBuffer> mmio0, mmio1; |
| status = pdev_->MapMmio(0, &mmio0); |
| if (status != ZX_OK) { |
| return status; |
| } |
| status = pdev_->MapMmio(1, &mmio1); |
| if (status != ZX_OK) { |
| return status; |
| } |
| |
| pdm_ = AmlPdmDevice::Create(*std::move(mmio0), |
| *std::move(mmio1), |
| HIFI_PLL, |
| 7, // clk_div for mclk = T931_HIFI_PLL_RATE/clk_div = 219.43 MHz. |
| 499, // clk_div for pdm_dclk = T931_HIFI_PLL_RATE/clk_div = 3.07MHz. |
| TODDR_B); |
| if (pdm_ == nullptr) { |
| zxlogf(ERROR, "%s failed to create pdm device\n", __func__); |
| return ZX_ERR_NO_MEMORY; |
| } |
| |
| InitBuffer(kRingBufferSize); |
| |
| pdm_->SetBuffer(pinned_ring_buffer_.region(0).phys_addr, |
| pinned_ring_buffer_.region(0).size); |
| |
| pdm_->ConfigPdmIn((1 << kNumberOfChannels) - 1); // First kNumberOfChannels channels. |
| |
| pdm_->Sync(); |
| |
| return ZX_OK; |
| } |
| |
| zx_status_t SherlockAudioStreamIn::ChangeFormat(const audio_proto::StreamSetFmtReq& req) { |
| fifo_depth_ = pdm_->fifo_depth(); |
| external_delay_nsec_ = 0; |
| |
| // At this time only one format is supported, and hardware is initialized |
| // during driver binding, so nothing to do at this time. |
| return ZX_OK; |
| } |
| |
| zx_status_t SherlockAudioStreamIn::GetBuffer(const audio_proto::RingBufGetBufferReq& req, |
| uint32_t* out_num_rb_frames, |
| zx::vmo* out_buffer) { |
| uint32_t rb_frames = |
| static_cast<uint32_t>(pinned_ring_buffer_.region(0).size) / frame_size_; |
| |
| if (req.min_ring_buffer_frames > rb_frames) { |
| return ZX_ERR_OUT_OF_RANGE; |
| } |
| zx_status_t status; |
| constexpr uint32_t rights = ZX_RIGHT_READ | ZX_RIGHT_WRITE | ZX_RIGHT_MAP | ZX_RIGHT_TRANSFER; |
| status = ring_buffer_vmo_.duplicate(rights, out_buffer); |
| if (status != ZX_OK) { |
| return status; |
| } |
| |
| *out_num_rb_frames = rb_frames; |
| |
| pdm_->SetBuffer(pinned_ring_buffer_.region(0).phys_addr, |
| rb_frames * frame_size_); |
| return ZX_OK; |
| } |
| |
| zx_status_t SherlockAudioStreamIn::Start(uint64_t* out_start_time) { |
| *out_start_time = pdm_->Start(); |
| |
| uint32_t notifs = LoadNotificationsPerRing(); |
| if (notifs) { |
| us_per_notification_ = static_cast<uint32_t>( |
| 1000 * pinned_ring_buffer_.region(0).size / (frame_size_ * 48 * notifs)); |
| notify_timer_->Arm(zx_deadline_after(ZX_USEC(us_per_notification_))); |
| } else { |
| us_per_notification_ = 0; |
| } |
| return ZX_OK; |
| } |
| |
| // Timer handler for sending out position notifications. |
| zx_status_t SherlockAudioStreamIn::ProcessRingNotification() { |
| ZX_ASSERT(us_per_notification_ != 0); |
| |
| notify_timer_->Arm(zx_deadline_after(ZX_USEC(us_per_notification_))); |
| |
| audio_proto::RingBufPositionNotify resp = {}; |
| resp.hdr.cmd = AUDIO_RB_POSITION_NOTIFY; |
| |
| resp.ring_buffer_pos = pdm_->GetRingPosition(); |
| return NotifyPosition(resp); |
| } |
| |
| zx_status_t SherlockAudioStreamIn::InitPost() { |
| |
| notify_timer_ = dispatcher::Timer::Create(); |
| if (notify_timer_ == nullptr) { |
| return ZX_ERR_NO_MEMORY; |
| } |
| |
| dispatcher::Timer::ProcessHandler thandler( |
| [pdm = this](dispatcher::Timer * timer)->zx_status_t { |
| OBTAIN_EXECUTION_DOMAIN_TOKEN(t, pdm->domain_); |
| return pdm->ProcessRingNotification(); |
| }); |
| |
| return notify_timer_->Activate(domain_, std::move(thandler)); |
| } |
| |
| zx_status_t SherlockAudioStreamIn::Stop() { |
| notify_timer_->Cancel(); |
| us_per_notification_ = 0; |
| pdm_->Stop(); |
| return ZX_OK; |
| } |
| |
| zx_status_t SherlockAudioStreamIn::AddFormats() { |
| fbl::AllocChecker ac; |
| supported_formats_.reserve(1, &ac); |
| if (!ac.check()) { |
| zxlogf(ERROR, "Out of memory, can not create supported formats list\n"); |
| return ZX_ERR_NO_MEMORY; |
| } |
| |
| audio_stream_format_range_t range; |
| range.min_channels = kNumberOfChannels; |
| range.max_channels = kNumberOfChannels; |
| range.sample_formats = AUDIO_SAMPLE_FORMAT_16BIT; |
| range.min_frames_per_second = 48000; |
| range.max_frames_per_second = 48000; |
| range.flags = ASF_RANGE_FLAG_FPS_48000_FAMILY; |
| |
| supported_formats_.push_back(range); |
| |
| return ZX_OK; |
| } |
| |
| zx_status_t SherlockAudioStreamIn::InitBuffer(size_t size) { |
| // TODO(ZX-3149): Per johngro's suggestion preallocate contiguous memory (say in |
| // platform bus) since we are likely to fail after running for a while and we need to |
| // init again (say the devhost is restarted). |
| zx_status_t status = zx_vmo_create_contiguous(bti_.get(), size, 0, |
| ring_buffer_vmo_.reset_and_get_address()); |
| if (status != ZX_OK) { |
| zxlogf(ERROR, "%s failed to allocate ring buffer vmo - %d\n", __func__, status); |
| return status; |
| } |
| |
| status = pinned_ring_buffer_.Pin(ring_buffer_vmo_, bti_, ZX_VM_PERM_READ | ZX_VM_PERM_WRITE); |
| if (status != ZX_OK) { |
| zxlogf(ERROR, "%s failed to pin ring buffer vmo - %d\n", __func__, status); |
| return status; |
| } |
| if (pinned_ring_buffer_.region_count() != 1) { |
| zxlogf(ERROR, "%s buffer is not contiguous", __func__); |
| return ZX_ERR_NO_MEMORY; |
| } |
| |
| return ZX_OK; |
| } |
| |
| } //namespace sherlock |
| } //namespace audio |
| |
| extern "C" zx_status_t pdm_audio_bind(void* ctx, zx_device_t* parent) { |
| |
| auto stream = |
| audio::SimpleAudioStream::Create<audio::sherlock::SherlockAudioStreamIn>(parent); |
| if (stream == nullptr) { |
| return ZX_ERR_NO_MEMORY; |
| } |
| |
| return ZX_OK; |
| } |