/* SPDX-License-Identifier: GPL-2.0-only */ #include <console/console.h> #include <commonlib/helpers.h> #include <device/device.h> #include <device/mmio.h> #include <amdblocks/gpio.h> #include <amdblocks/aoac.h> #include <amdblocks/uart.h> #include <soc/aoac_defs.h> #include <soc/southbridge.h> #include <soc/gpio.h> #include <soc/uart.h> #include <types.h> static const struct { uintptr_t base; struct soc_amd_gpio mux[2]; } uart_info[] = { [0] = { APU_UART0_BASE, { PAD_NF(GPIO_138, UART0_TXD, PULL_NONE), PAD_NF(GPIO_136, UART0_RXD, PULL_NONE), } }, [1] = { APU_UART1_BASE, { PAD_NF(GPIO_143, UART1_TXD, PULL_NONE), PAD_NF(GPIO_141, UART1_RXD, PULL_NONE), } }, [2] = { APU_UART2_BASE, { PAD_NF(GPIO_137, UART2_TXD, PULL_NONE), PAD_NF(GPIO_135, UART2_RXD, PULL_NONE), } }, [3] = { APU_UART3_BASE, { PAD_NF(GPIO_140, UART3_TXD, PULL_NONE), PAD_NF(GPIO_142, UART3_RXD, PULL_NONE), } }, }; uintptr_t get_uart_base(unsigned int idx) { if (idx >= ARRAY_SIZE(uart_info)) return 0; return uart_info[idx].base; } void clear_uart_legacy_config(void) { write16((void *)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) { switch (dev->path.mmio.addr) { case APU_UART0_BASE: return "FUR0"; case APU_UART1_BASE: return "FUR1"; case APU_UART2_BASE: return "FUR2"; case APU_UART3_BASE: return "FUR3"; default: 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; switch (dev->path.mmio.addr) { case APU_UART0_BASE: dev_id = FCH_AOAC_DEV_UART0; break; case APU_UART1_BASE: dev_id = FCH_AOAC_DEV_UART1; break; case APU_UART2_BASE: dev_id = FCH_AOAC_DEV_UART2; break; case APU_UART3_BASE: dev_id = FCH_AOAC_DEV_UART3; break; default: 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(dev, 0, dev->path.mmio.addr / KiB, 4); } struct device_operations picasso_uart_mmio_ops = { .read_resources = uart_read_resources, .set_resources = noop_set_resources, .scan_bus = scan_static_bus, .acpi_name = uart_acpi_name, .enable = uart_enable, .acpi_fill_ssdt = uart_inject_ssdt, };