/* SPDX-License-Identifier: GPL-2.0-only */ #include <stdint.h> #include <amdblocks/acpimmio.h> #include <amdblocks/aoac.h> #include <soc/aoac_defs.h> #include <soc/southbridge.h> #include <delay.h> #define FCH_AOAC_UART_FOR_CONSOLE \ (CONFIG_UART_FOR_CONSOLE == 0 ? FCH_AOAC_DEV_UART0 \ : CONFIG_UART_FOR_CONSOLE == 1 ? FCH_AOAC_DEV_UART1 \ : CONFIG_UART_FOR_CONSOLE == 2 ? FCH_AOAC_DEV_UART2 \ : CONFIG_UART_FOR_CONSOLE == 3 ? FCH_AOAC_DEV_UART3 \ : CONFIG_UART_FOR_CONSOLE == 4 ? FCH_AOAC_DEV_UART4 \ : -1) #if CONFIG(AMD_SOC_CONSOLE_UART) && FCH_AOAC_UART_FOR_CONSOLE == -1 # error Unsupported UART_FOR_CONSOLE chosen #endif /* * Table of devices that need their AOAC registers enabled and waited * upon (usually about .55 milliseconds). Instead of individual delays * waiting for each device to become available, a single delay will be * executed. The console UART is handled separately from this table. * * TODO: Find out which I2C controllers we really need to enable here. */ const static unsigned int aoac_devs[] = { FCH_AOAC_DEV_AMBA, FCH_AOAC_DEV_I2C0, FCH_AOAC_DEV_I2C1, FCH_AOAC_DEV_I2C2, FCH_AOAC_DEV_I2C3, FCH_AOAC_DEV_ESPI, }; void wait_for_aoac_enabled(unsigned int dev) { while (!is_aoac_device_enabled(dev)) udelay(100); } void enable_aoac_devices(void) { unsigned int i; for (i = 0; i < ARRAY_SIZE(aoac_devs); i++) power_on_aoac_device(aoac_devs[i]); if (CONFIG(AMD_SOC_CONSOLE_UART)) power_on_aoac_device(FCH_AOAC_UART_FOR_CONSOLE); /* Wait for AOAC devices to indicate power and clock OK */ for (i = 0; i < ARRAY_SIZE(aoac_devs); i++) wait_for_aoac_enabled(aoac_devs[i]); if (CONFIG(AMD_SOC_CONSOLE_UART)) wait_for_aoac_enabled(FCH_AOAC_UART_FOR_CONSOLE); }