| // Copyright 2020 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 <lib/mmio/mmio.h> |
| |
| #include <optional> |
| |
| #include <ddk/binding.h> |
| #include <ddk/debug.h> |
| #include <ddk/metadata.h> |
| #include <ddk/metadata/spi.h> |
| #include <ddk/platform-defs.h> |
| #include <soc/mt8183/mt8183-hw.h> |
| |
| #include "c18.h" |
| |
| namespace board_c18 { |
| |
| constexpr uint32_t kTopCkGenRegBase = 0x10000000; |
| constexpr uint32_t kTopCkGenRegSize = 0x1000; |
| constexpr uint32_t kClkCfg3SetOffset = 0x74; |
| constexpr uint32_t kClkCfg3ClrOffset = 0x78; |
| constexpr uint32_t kClkCfgUpdateOffset = 0x04; |
| constexpr uint32_t kSpiCkUpdateShift = 15; |
| constexpr uint32_t kSpiClockOffShift = 31; |
| constexpr uint32_t kClkSpiSelShift = 24; |
| constexpr uint32_t kMainPllD5D2 = 1; |
| |
| static const pbus_mmio_t spi_mmios[] = { |
| { |
| .base = MT8183_SPI2_BASE, |
| .length = MT8183_SPI_SIZE, |
| }, |
| }; |
| |
| static const spi_channel_t spi_channels[] = { |
| { |
| .bus_id = C18_SPI2, |
| .cs = 0, // index into matching chip-select map |
| }, |
| }; |
| |
| static const pbus_metadata_t spi_metadata[] = { |
| { |
| .type = DEVICE_METADATA_SPI_CHANNELS, |
| .data_buffer = spi_channels, |
| .data_size = sizeof spi_channels, |
| }, |
| }; |
| |
| static pbus_dev_t spi_dev = []() { |
| pbus_dev_t dev = {}; |
| dev.name = "c18-spi"; |
| dev.vid = PDEV_VID_MEDIATEK; |
| dev.did = PDEV_DID_MEDIATEK_SPI; |
| dev.mmio_list = spi_mmios; |
| dev.mmio_count = countof(spi_mmios); |
| dev.metadata_list = spi_metadata; |
| dev.metadata_count = countof(spi_metadata); |
| return dev; |
| }(); |
| |
| zx_status_t C18::SpiInit() { |
| // 1. Configure GPIOs |
| gpio_impl_.SetAltFunction(MT8183_GPIO_SPI2_MI, 7); |
| gpio_impl_.ConfigOut(MT8183_GPIO_SPI2_CSB, 1); |
| gpio_impl_.SetAltFunction(MT8183_GPIO_SPI2_MO, 7); |
| gpio_impl_.SetAltFunction(MT8183_GPIO_SPI2_CLK, 7); |
| |
| { |
| // Enable Clock |
| std::optional<ddk::MmioBuffer> mmio2; |
| auto status = ddk::MmioBuffer::Create( |
| kTopCkGenRegBase, kTopCkGenRegSize, |
| // Please do not use get_root_resource() in new code (fxbug.dev/31358). |
| zx::resource(get_root_resource()), ZX_CACHE_POLICY_UNCACHED_DEVICE, &mmio2); |
| if (status != ZX_OK) { |
| zxlogf(ERROR, "%s: MmioBuffer Create failed %d ", __PRETTY_FUNCTION__, status); |
| return status; |
| } |
| |
| mmio2->SetBits32(1 << kSpiClockOffShift, kClkCfg3ClrOffset); |
| mmio2->SetBits32(1 << kSpiCkUpdateShift, kClkCfgUpdateOffset); |
| mmio2->SetBits32(kMainPllD5D2 << kClkSpiSelShift, kClkCfg3SetOffset); |
| mmio2->SetBits32(1 << kSpiCkUpdateShift, kClkCfgUpdateOffset); |
| } |
| |
| zx_status_t status = pbus_.DeviceAdd(&spi_dev); |
| if (status != ZX_OK) { |
| zxlogf(ERROR, "%s: DeviceAdd failed %d", __func__, status); |
| } |
| |
| return status; |
| } |
| |
| } // namespace board_c18 |