113 lines
2.4 KiB
C
113 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#include <console/console.h>
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#include <commonlib/helpers.h>
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#include <device/device.h>
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#include <device/mmio.h>
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#include <amdblocks/gpio_banks.h>
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#include <amdblocks/aoac.h>
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#include <amdblocks/uart.h>
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#include <soc/southbridge.h>
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#include <soc/gpio.h>
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#include <soc/uart.h>
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#include <types.h>
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static const struct {
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uintptr_t base;
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struct soc_amd_gpio mux[2];
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} uart_info[] = {
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[0] = { APU_UART0_BASE, {
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PAD_NF(GPIO_138, UART0_TXD, PULL_NONE),
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PAD_NF(GPIO_136, UART0_RXD, PULL_NONE),
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} },
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[1] = { APU_UART1_BASE, {
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PAD_NF(GPIO_143, UART1_TXD, PULL_NONE),
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PAD_NF(GPIO_141, UART1_RXD, PULL_NONE),
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} },
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[2] = { APU_UART2_BASE, {
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PAD_NF(GPIO_137, UART2_TXD, PULL_NONE),
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PAD_NF(GPIO_135, UART2_RXD, PULL_NONE),
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} },
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[3] = { APU_UART3_BASE, {
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PAD_NF(GPIO_140, UART3_TXD, PULL_NONE),
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PAD_NF(GPIO_142, UART3_RXD, PULL_NONE),
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} },
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};
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uintptr_t get_uart_base(unsigned int idx)
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{
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if (idx >= ARRAY_SIZE(uart_info))
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return 0;
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return uart_info[idx].base;
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}
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void clear_uart_legacy_config(void)
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{
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write16((void *)FCH_LEGACY_UART_DECODE, 0);
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}
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void set_uart_config(unsigned int idx)
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{
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if (idx >= ARRAY_SIZE(uart_info))
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return;
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program_gpios(uart_info[idx].mux, 2);
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}
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static const char *uart_acpi_name(const struct device *dev)
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{
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switch (dev->path.mmio.addr) {
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case APU_UART0_BASE:
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return "FUR0";
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case APU_UART1_BASE:
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return "FUR1";
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case APU_UART2_BASE:
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return "FUR2";
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case APU_UART3_BASE:
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return "FUR3";
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default:
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return NULL;
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}
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}
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/* Even though this is called enable, it gets called for both enabled and disabled devices. */
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static void uart_enable(struct device *dev)
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{
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unsigned int dev_id;
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switch (dev->path.mmio.addr) {
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case APU_UART0_BASE:
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dev_id = FCH_AOAC_DEV_UART0;
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break;
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case APU_UART1_BASE:
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dev_id = FCH_AOAC_DEV_UART1;
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break;
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case APU_UART2_BASE:
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dev_id = FCH_AOAC_DEV_UART2;
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break;
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case APU_UART3_BASE:
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dev_id = FCH_AOAC_DEV_UART3;
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break;
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default:
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printk(BIOS_ERR, "%s: Unknown device: %s\n", __func__, dev_path(dev));
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return;
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}
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if (dev->enabled) {
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power_on_aoac_device(dev_id);
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wait_for_aoac_enabled(dev_id);
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} else {
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power_off_aoac_device(dev_id);
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}
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}
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struct device_operations picasso_uart_mmio_ops = {
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.read_resources = noop_read_resources,
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.set_resources = noop_set_resources,
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.scan_bus = scan_static_bus,
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.acpi_name = uart_acpi_name,
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.enable = uart_enable,
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.acpi_fill_ssdt = uart_inject_ssdt,
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};
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