From 86fd16cc0b755fb874777b7da61076322f903805 Mon Sep 17 00:00:00 2001 From: Andre Heider Date: Fri, 16 Feb 2018 12:44:42 +0100 Subject: [PATCH] soc/nvidia/tegra210: add console UART helper functions These small helper functions aim at supporting the user setting CONFIG_CONSOLE_SERIAL_TEGRA210_UARTx. Change-Id: I71423a0424927ff383bcbf194c9fbaa452d810a1 Signed-off-by: Andre Heider Reviewed-on: https://review.coreboot.org/23795 Tested-by: build bot (Jenkins) Reviewed-by: Julius Werner --- .../tegra210/include/soc/console_uart.h | 113 ++++++++++++++++++ 1 file changed, 113 insertions(+) create mode 100644 src/soc/nvidia/tegra210/include/soc/console_uart.h diff --git a/src/soc/nvidia/tegra210/include/soc/console_uart.h b/src/soc/nvidia/tegra210/include/soc/console_uart.h new file mode 100644 index 0000000000..fc30481326 --- /dev/null +++ b/src/soc/nvidia/tegra210/include/soc/console_uart.h @@ -0,0 +1,113 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2018 Andre Heider + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef __SOC_NVIDIA_TEGRA210_INCLUDE_SOC_CONSOLE_UART_H__ +#define __SOC_NVIDIA_TEGRA210_INCLUDE_SOC_CONSOLE_UART_H__ + +#include + +enum console_uart_id { + UART_ID_NONE = -1, + UART_ID_A = 0, + UART_ID_B = 1, + UART_ID_C = 2, + UART_ID_D = 3, + UART_ID_E = 4, +}; + +static inline enum console_uart_id console_uart_get_id(void) +{ + if (IS_ENABLED(CONFIG_CONSOLE_SERIAL_TEGRA210_UARTA)) + return UART_ID_A; + + if (IS_ENABLED(CONFIG_CONSOLE_SERIAL_TEGRA210_UARTB)) + return UART_ID_B; + + if (IS_ENABLED(CONFIG_CONSOLE_SERIAL_TEGRA210_UARTC)) + return UART_ID_C; + + if (IS_ENABLED(CONFIG_CONSOLE_SERIAL_TEGRA210_UARTD)) + return UART_ID_D; + + if (IS_ENABLED(CONFIG_CONSOLE_SERIAL_TEGRA210_UARTE)) + return UART_ID_E; + + return UART_ID_NONE; +} + +static inline void *console_uart_clk_rst_reg(void) +{ + switch (console_uart_get_id()) { + case UART_ID_NONE: + return NULL; + case UART_ID_A: + return CLK_RST_REG(clk_src_uarta); + case UART_ID_B: + return CLK_RST_REG(clk_src_uartb); + case UART_ID_C: + return CLK_RST_REG(clk_src_uartc); + case UART_ID_D: + return CLK_RST_REG(clk_src_uartd); + case UART_ID_E: + return CLK_RST_REG(clk_src_uarte); + } + + return NULL; +} + +static inline uint32_t console_uart_clk_src_dev_id(void) +{ + switch (console_uart_get_id()) { + case UART_ID_NONE: + return 0; + case UART_ID_A: + return CLK_SRC_DEV_ID(UARTA, PLLP); + case UART_ID_B: + return CLK_SRC_DEV_ID(UARTB, PLLP); + case UART_ID_C: + return CLK_SRC_DEV_ID(UARTC, PLLP); + case UART_ID_D: + return CLK_SRC_DEV_ID(UARTD, PLLP); + case UART_ID_E: + return CLK_SRC_DEV_ID(UARTE, PLLP); + } + + return 0; +} + +static inline void console_uart_clock_enable_clear_reset(void) +{ + switch (console_uart_get_id()) { + case UART_ID_NONE: + return; + case UART_ID_A: + clock_enable_clear_reset_l(CLK_L_UARTA); + break; + case UART_ID_B: + clock_enable_clear_reset_l(CLK_L_UARTB); + break; + case UART_ID_C: + clock_enable_clear_reset_h(CLK_H_UARTC); + break; + case UART_ID_D: + clock_enable_clear_reset_u(CLK_U_UARTD); + break; + case UART_ID_E: + clock_enable_clear_reset_u(CLK_U_UARTE); + break; + } +} + +#endif /* __SOC_NVIDIA_TEGRA210_INCLUDE_SOC_CONSOLE_UART_H__ */