| /* 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 soc_uart_ctrlr_info 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), |
| } }, |
| [2] = { APU_UART2_BASE, FCH_AOAC_DEV_UART2, "FUR2", { |
| PAD_NF(GPIO_138, UART2_TXD, PULL_NONE), |
| PAD_NF(GPIO_136, UART2_RXD, PULL_NONE), |
| } }, |
| [3] = { APU_UART3_BASE, FCH_AOAC_DEV_UART3, "FUR3", { |
| PAD_NF(GPIO_135, UART3_TXD, PULL_NONE), |
| PAD_NF(GPIO_137, UART3_RXD, PULL_NONE), |
| } }, |
| [4] = { APU_UART4_BASE, FCH_AOAC_DEV_UART4, "FUR4", { |
| PAD_NF(GPIO_156, UART4_TXD, PULL_NONE), |
| PAD_NF(GPIO_155, UART4_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 mendocino_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, |
| }; |