Felix Held | 62ef88f | 2020-12-08 23:18:19 +0100 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 2 | |
| 3 | #include <stdint.h> |
| 4 | #include <amdblocks/acpimmio.h> |
| 5 | #include <amdblocks/aoac.h> |
Felix Held | 117823e | 2021-06-15 16:33:29 +0200 | [diff] [blame] | 6 | #include <soc/aoac_defs.h> |
Felix Held | 62ef88f | 2020-12-08 23:18:19 +0100 | [diff] [blame] | 7 | #include <soc/southbridge.h> |
| 8 | #include <delay.h> |
| 9 | |
Felix Held | 62ef88f | 2020-12-08 23:18:19 +0100 | [diff] [blame] | 10 | #if CONFIG(AMD_SOC_CONSOLE_UART) && FCH_AOAC_UART_FOR_CONSOLE == -1 |
| 11 | # error Unsupported UART_FOR_CONSOLE chosen |
| 12 | #endif |
| 13 | |
| 14 | /* |
| 15 | * Table of devices that need their AOAC registers enabled and waited |
| 16 | * upon (usually about .55 milliseconds). Instead of individual delays |
| 17 | * waiting for each device to become available, a single delay will be |
| 18 | * executed. The console UART is handled separately from this table. |
| 19 | * |
| 20 | * TODO: Find out which I2C controllers we really need to enable here. |
| 21 | */ |
Elyes Haouas | 2476942 | 2023-01-12 06:21:42 +0100 | [diff] [blame] | 22 | static const unsigned int aoac_devs[] = { |
Felix Held | 62ef88f | 2020-12-08 23:18:19 +0100 | [diff] [blame] | 23 | FCH_AOAC_DEV_AMBA, |
| 24 | FCH_AOAC_DEV_I2C0, |
| 25 | FCH_AOAC_DEV_I2C1, |
| 26 | FCH_AOAC_DEV_I2C2, |
| 27 | FCH_AOAC_DEV_I2C3, |
| 28 | FCH_AOAC_DEV_ESPI, |
| 29 | }; |
| 30 | |
| 31 | void wait_for_aoac_enabled(unsigned int dev) |
| 32 | { |
| 33 | while (!is_aoac_device_enabled(dev)) |
| 34 | udelay(100); |
| 35 | } |
| 36 | |
| 37 | void enable_aoac_devices(void) |
| 38 | { |
| 39 | unsigned int i; |
| 40 | |
| 41 | for (i = 0; i < ARRAY_SIZE(aoac_devs); i++) |
| 42 | power_on_aoac_device(aoac_devs[i]); |
| 43 | |
| 44 | if (CONFIG(AMD_SOC_CONSOLE_UART)) |
| 45 | power_on_aoac_device(FCH_AOAC_UART_FOR_CONSOLE); |
| 46 | |
| 47 | /* Wait for AOAC devices to indicate power and clock OK */ |
| 48 | for (i = 0; i < ARRAY_SIZE(aoac_devs); i++) |
| 49 | wait_for_aoac_enabled(aoac_devs[i]); |
| 50 | |
| 51 | if (CONFIG(AMD_SOC_CONSOLE_UART)) |
| 52 | wait_for_aoac_enabled(FCH_AOAC_UART_FOR_CONSOLE); |
| 53 | } |