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/* SPDX-License-Identifier: GPL-2.0-only */
#include <stdint.h>
#include <amdblocks/acpimmio.h>
#include <amdblocks/aoac.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 \
: -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);
}
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