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/* SPDX-License-Identifier: GPL-2.0-only */
#include <acpi/acpigen.h>
#include <console/console.h>
#include <gpio.h>
static int acpigen_soc_gpio_op(const char *op, unsigned int gpio_num)
{
if (gpio_num >= SOC_GPIO_TOTAL_PINS) {
printk(BIOS_WARNING, "Pin %d should be smaller than"
" %d\n", gpio_num, SOC_GPIO_TOTAL_PINS);
return -1;
}
if (SOC_GPIO_TOTAL_PINS >= AMD_GPIO_FIRST_REMOTE_GPIO_NUMBER &&
gpio_num >= SOC_GPIO_TOTAL_PINS) {
printk(BIOS_WARNING, "Pin %d is a remote GPIO which isn't supported"
" yet.\n", gpio_num);
return -1;
}
/* op (gpio_num) */
acpigen_emit_namestring(op);
acpigen_write_integer(gpio_num);
return 0;
}
static int acpigen_soc_get_gpio_state(const char *op, unsigned int gpio_num)
{
if (gpio_num >= SOC_GPIO_TOTAL_PINS) {
printk(BIOS_WARNING, "Pin %d should be smaller than"
" %d\n", gpio_num, SOC_GPIO_TOTAL_PINS);
return -1;
}
if (SOC_GPIO_TOTAL_PINS >= AMD_GPIO_FIRST_REMOTE_GPIO_NUMBER &&
gpio_num >= SOC_GPIO_TOTAL_PINS) {
printk(BIOS_WARNING, "Pin %d is a remote GPIO which isn't supported"
" yet.\n", gpio_num);
return -1;
}
/* Store (op (gpio_num), Local0) */
acpigen_write_store();
acpigen_soc_gpio_op(op, gpio_num);
acpigen_emit_byte(LOCAL0_OP);
return 0;
}
int acpigen_soc_read_rx_gpio(unsigned int gpio_num)
{
return acpigen_soc_get_gpio_state("\\_SB.GRXS", gpio_num);
}
int acpigen_soc_get_tx_gpio(unsigned int gpio_num)
{
return acpigen_soc_get_gpio_state("\\_SB.GTXS", gpio_num);
}
int acpigen_soc_set_tx_gpio(unsigned int gpio_num)
{
return acpigen_soc_gpio_op("\\_SB.STXS", gpio_num);
}
int acpigen_soc_clear_tx_gpio(unsigned int gpio_num)
{
return acpigen_soc_gpio_op("\\_SB.CTXS", gpio_num);
}
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