| // 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 <unistd.h> |
| #include <ddk/debug.h> |
| #include <ddk/device.h> |
| #include <ddk/mmio-buffer.h> |
| #include <ddk/metadata.h> |
| #include <ddk/platform-defs.h> |
| #include <ddk/protocol/gpioimpl.h> |
| #include <ddk/protocol/platform/bus.h> |
| #include <ddk/protocol/serial.h> |
| #include <hw/reg.h> |
| #include <soc/aml-s905d2/s905d2-gpio.h> |
| #include <soc/aml-s905d2/s905d2-hw.h> |
| #include <zircon/device/serial.h> |
| |
| #include "astro.h" |
| |
| #define SOC_WIFI_LPO_32k768 S905D2_GPIOX(16) |
| #define SOC_BT_REG_ON S905D2_GPIOX(17) |
| |
| static const pbus_mmio_t bt_uart_mmios[] = { |
| { |
| .base = S905D2_UART_A_BASE, |
| .length = S905D2_UART_A_LENGTH, |
| }, |
| }; |
| |
| static const pbus_irq_t bt_uart_irqs[] = { |
| { |
| .irq = S905D2_UART_A_IRQ, |
| .mode = ZX_INTERRUPT_MODE_EDGE_HIGH, |
| }, |
| }; |
| |
| static const serial_port_info_t bt_uart_serial_info = { |
| .serial_class = SERIAL_CLASS_BLUETOOTH_HCI, |
| .serial_vid = PDEV_VID_BROADCOM, |
| .serial_pid = PDEV_PID_BCM43458, |
| }; |
| |
| static const pbus_metadata_t bt_uart_metadata[] = { |
| { |
| .type = DEVICE_METADATA_SERIAL_PORT_INFO, |
| .data_buffer = &bt_uart_serial_info, |
| .data_size = sizeof(bt_uart_serial_info), |
| }, |
| }; |
| |
| static const pbus_boot_metadata_t bt_uart_boot_metadata[] = { |
| { |
| .zbi_type = DEVICE_METADATA_MAC_ADDRESS, |
| .zbi_extra = MACADDR_BLUETOOTH, |
| }, |
| }; |
| |
| static pbus_dev_t bt_uart_dev = { |
| .name = "bt-uart", |
| .vid = PDEV_VID_AMLOGIC, |
| .pid = PDEV_PID_GENERIC, |
| .did = PDEV_DID_AMLOGIC_UART, |
| .mmio_list = bt_uart_mmios, |
| .mmio_count = countof(bt_uart_mmios), |
| .irq_list = bt_uart_irqs, |
| .irq_count = countof(bt_uart_irqs), |
| .metadata_list = bt_uart_metadata, |
| .metadata_count = countof(bt_uart_metadata), |
| .boot_metadata_list = bt_uart_boot_metadata, |
| .boot_metadata_count = countof(bt_uart_boot_metadata), |
| }; |
| |
| // Enables and configures PWM_E on the SOC_WIFI_LPO_32k768 line for the Wifi/Bluetooth module |
| static zx_status_t aml_enable_wifi_32K(aml_bus_t* bus) { |
| // Configure SOC_WIFI_LPO_32k768 pin for PWM_E |
| zx_status_t status = gpio_impl_set_alt_function(&bus->gpio, SOC_WIFI_LPO_32k768, 1); |
| if (status != ZX_OK) return status; |
| |
| zx_handle_t bti; |
| status = iommu_get_bti(&bus->iommu, 0, BTI_BOARD, &bti); |
| if (status != ZX_OK) { |
| zxlogf(ERROR, "aml_enable_wifi_32K: iommu_get_bti failed: %d\n", status); |
| return status; |
| } |
| mmio_buffer_t buffer; |
| // Please do not use get_root_resource() in new code. See ZX-1497. |
| status = mmio_buffer_init_physical(&buffer, S905D2_PWM_BASE, 0x1a000, get_root_resource(), |
| ZX_CACHE_POLICY_UNCACHED_DEVICE); |
| if (status != ZX_OK) { |
| zxlogf(ERROR, "aml_enable_wifi_32K: mmio_buffer_init_physical failed: %d\n", status); |
| zx_handle_close(bti); |
| return status; |
| } |
| uint32_t* regs = buffer.vaddr; |
| |
| // these magic numbers were gleaned by instrumenting drivers/amlogic/pwm/pwm_meson.c |
| // TODO(voydanoff) write a proper PWM driver |
| writel(0x016d016e, regs + S905D2_PWM_PWM_E); |
| writel(0x016d016d, regs + S905D2_PWM_E2); |
| writel(0x0a0a0609, regs + S905D2_PWM_TIME_EF); |
| writel(0x02808003, regs + S905D2_PWM_MISC_REG_EF); |
| |
| mmio_buffer_release(&buffer); |
| zx_handle_close(bti); |
| |
| return ZX_OK; |
| } |
| |
| zx_status_t aml_bluetooth_init(aml_bus_t* bus) { |
| zx_status_t status; |
| |
| // set alternate functions to enable Bluetooth UART |
| status = gpio_impl_set_alt_function(&bus->gpio, S905D2_UART_TX_A, S905D2_UART_TX_A_FN); |
| if (status != ZX_OK) return status; |
| status = gpio_impl_set_alt_function(&bus->gpio, S905D2_UART_RX_A, S905D2_UART_RX_A_FN); |
| if (status != ZX_OK) return status; |
| status = gpio_impl_set_alt_function(&bus->gpio, S905D2_UART_CTS_A, S905D2_UART_CTS_A_FN); |
| if (status != ZX_OK) return status; |
| status = gpio_impl_set_alt_function(&bus->gpio, S905D2_UART_RTS_A, S905D2_UART_RTS_A_FN); |
| if (status != ZX_OK) return status; |
| |
| // Configure the SOC_WIFI_LPO_32k768 PWM, which is needed for the Bluetooth module to work properly |
| status = aml_enable_wifi_32K(bus); |
| if (status != ZX_OK) { |
| return status; |
| } |
| |
| // set GPIO to reset Bluetooth module |
| gpio_impl_config_out(&bus->gpio, SOC_BT_REG_ON, 0); |
| usleep(10 * 1000); |
| gpio_impl_write(&bus->gpio, SOC_BT_REG_ON, 1); |
| usleep(100 * 1000); |
| |
| // Bind UART for Bluetooth HCI |
| status = pbus_device_add(&bus->pbus, &bt_uart_dev); |
| if (status != ZX_OK) { |
| zxlogf(ERROR, "aml_uart_init: pbus_device_add failed: %d\n", status); |
| return status; |
| } |
| |
| return ZX_OK; |
| } |