| /* 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> |
| |
| #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. |
| */ |
| static const 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); |
| } |