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/* SPDX-License-Identifier: GPL-2.0-only */
#include <amdblocks/aoac.h>
#include <amdblocks/gpio.h>
#include <amdblocks/uart.h>
#include <commonlib/helpers.h>
#include <console/console.h>
#include <device/device.h>
#include <device/mmio.h>
#include <soc/aoac_defs.h>
#include <soc/gpio.h>
#include <soc/southbridge.h>
#include <soc/uart.h>
#include <types.h>
static const struct {
uintptr_t base;
unsigned int aoac_device;
const char *acpi_name;
struct soc_amd_gpio mux[2];
} uart_info[] = {
[0] = { APU_UART0_BASE, FCH_AOAC_DEV_UART0, "FUR0", {
PAD_NF(GPIO_143, UART0_TXD, PULL_NONE),
PAD_NF(GPIO_141, UART0_RXD, PULL_NONE),
} },
[1] = { APU_UART1_BASE, FCH_AOAC_DEV_UART1, "FUR1", {
PAD_NF(GPIO_140, UART1_TXD, PULL_NONE),
PAD_NF(GPIO_142, UART1_RXD, PULL_NONE),
} },
};
uintptr_t get_uart_base(unsigned int idx)
{
if (idx >= ARRAY_SIZE(uart_info))
return 0;
return uart_info[idx].base;
}
static enum cb_err get_uart_idx(uintptr_t base, unsigned int *idx)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(uart_info); i++) {
if (base == uart_info[i].base) {
*idx = i;
return CB_SUCCESS;
}
}
return CB_ERR;
}
static enum cb_err get_uart_aoac_device(uintptr_t base, unsigned int *aoac_dev)
{
unsigned int idx;
if (get_uart_idx(base, &idx) == CB_ERR)
return CB_ERR;
*aoac_dev = uart_info[idx].aoac_device;
return CB_SUCCESS;
}
void clear_uart_legacy_config(void)
{
write16p(FCH_LEGACY_UART_DECODE, 0);
}
void set_uart_config(unsigned int idx)
{
if (idx >= ARRAY_SIZE(uart_info))
return;
gpio_configure_pads(uart_info[idx].mux, 2);
}
static const char *uart_acpi_name(const struct device *dev)
{
unsigned int idx;
if (get_uart_idx(dev->path.mmio.addr, &idx) == CB_SUCCESS)
return uart_info[idx].acpi_name;
else
return NULL;
}
/* Even though this is called enable, it gets called for both enabled and disabled devices. */
static void uart_enable(struct device *dev)
{
unsigned int dev_id;
if (get_uart_aoac_device(dev->path.mmio.addr, &dev_id) == CB_ERR) {
printk(BIOS_ERR, "%s: Unknown device: %s\n", __func__, dev_path(dev));
return;
}
if (dev->enabled) {
power_on_aoac_device(dev_id);
wait_for_aoac_enabled(dev_id);
} else {
power_off_aoac_device(dev_id);
}
}
static void uart_read_resources(struct device *dev)
{
mmio_resource_kb(dev, 0, dev->path.mmio.addr / KiB, 4);
}
struct device_operations cezanne_uart_mmio_ops = {
.read_resources = uart_read_resources,
.set_resources = noop_set_resources,
.scan_bus = scan_static_bus,
.enable = uart_enable,
.acpi_name = uart_acpi_name,
.acpi_fill_ssdt = uart_inject_ssdt,
};
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