esp32s2: drivers: serial: add minimal uart driver
based on uart rom functions, also enable console driver on top of this driver, which enables logging Signed-off-by: Glauber Maroto Ferreira <glauber.ferreira@espressif.com>
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9 changed files with 122 additions and 0 deletions
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@ -318,6 +318,7 @@
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/drivers/serial/Kconfig.test @str4t0m
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/drivers/serial/serial_test.c @str4t0m
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/drivers/serial/*esp32c3* @uLipe
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/drivers/serial/*esp32s2* @glaubermaroto
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/drivers/disk/ @jfischer-no
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/drivers/disk/sdmmc_sdhc.h @JunYangNXP
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/drivers/disk/sdmmc_spi.c @JunYangNXP
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@ -14,5 +14,12 @@
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chosen {
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zephyr,sram = &sram0;
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zephyr,console = &uart0;
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zephyr,shell-uart = &uart0;
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};
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};
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&uart0 {
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status = "okay";
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current-speed = <115200>;
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};
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@ -8,6 +8,11 @@ CONFIG_MAIN_STACK_SIZE=2048
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CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=240000000
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CONFIG_CONSOLE=y
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CONFIG_SERIAL=y
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CONFIG_UART_CONSOLE=y
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CONFIG_UART_ROM_ESP32S2=y
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CONFIG_XTENSA_USE_CORE_CRT1=n
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CONFIG_GEN_ISR_TABLES=y
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@ -9,6 +9,7 @@ zephyr_library_sources_ifdef(CONFIG_UART_CC32XX uart_cc32xx.c)
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zephyr_library_sources_ifdef(CONFIG_UART_CMSDK_APB uart_cmsdk_apb.c)
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zephyr_library_sources_ifdef(CONFIG_UART_ESP32 uart_esp32.c)
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zephyr_library_sources_ifdef(CONFIG_UART_ROM_ESP32C3 uart_rom_esp32c3.c)
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zephyr_library_sources_ifdef(CONFIG_UART_ROM_ESP32S2 uart_rom_esp32s2.c)
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zephyr_library_sources_ifdef(CONFIG_UART_SIFIVE uart_sifive.c)
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zephyr_library_sources_ifdef(CONFIG_UART_GECKO uart_gecko.c)
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zephyr_library_sources_ifdef(CONFIG_LEUART_GECKO leuart_gecko.c)
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@ -123,6 +123,8 @@ source "drivers/serial/Kconfig.esp32"
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source "drivers/serial/Kconfig.esp32c3_rom"
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source "drivers/serial/Kconfig.esp32s2_rom"
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source "drivers/serial/Kconfig.gecko"
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source "drivers/serial/Kconfig.leuart_gecko"
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10
drivers/serial/Kconfig.esp32s2_rom
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10
drivers/serial/Kconfig.esp32s2_rom
Normal file
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@ -0,0 +1,10 @@
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# Copyright (c) 2021 Espressif Systems (Shanghai) Co., Ltd.
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# SPDX-License-Identifier: Apache-2.0
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config UART_ROM_ESP32S2
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bool "ESP32S2 ROM UART driver"
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default y
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select SERIAL_HAS_DRIVER
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depends on SOC_ESP32S2
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help
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Enable the ESP32S2 UART using ROM routines.
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57
drivers/serial/uart_rom_esp32s2.c
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57
drivers/serial/uart_rom_esp32s2.c
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@ -0,0 +1,57 @@
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/*
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* Copyright (c) 2021 Espressif Systems (Shanghai) Co., Ltd.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#define DT_DRV_COMPAT espressif_esp32s2_uart
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/* Include esp-idf headers first to avoid redefining BIT() macro */
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#include <soc.h>
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#include <esp_attr.h>
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#include <device.h>
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#include <drivers/uart.h>
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#include <drivers/clock_control.h>
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static int uart_rom_esp32s2_poll_in(const struct device *dev, unsigned char *p_char)
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{
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ARG_UNUSED(dev);
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return (int)esp_rom_uart_rx_one_char(p_char);
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}
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static IRAM_ATTR void uart_rom_esp32s2_poll_out(const struct device *dev,
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unsigned char c)
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{
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ARG_UNUSED(dev);
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esp_rom_uart_tx_one_char(c);
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}
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static int uart_rom_esp32s2_poll_err_check(const struct device *dev)
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{
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ARG_UNUSED(dev);
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return 0;
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}
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static int uart_rom_esp32s2_init(const struct device *dev)
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{
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ARG_UNUSED(dev);
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return 0;
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}
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static const DRAM_ATTR struct uart_driver_api uart_rom_esp32s2_api = {
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.poll_in = uart_rom_esp32s2_poll_in,
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.poll_out = uart_rom_esp32s2_poll_out,
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.err_check = uart_rom_esp32s2_poll_err_check,
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};
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#define ESP32S2_ROM_UART_INIT(idx) \
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DEVICE_DT_DEFINE(DT_NODELABEL(uart##idx), \
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&uart_rom_esp32s2_init, \
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NULL, \
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NULL, \
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NULL, \
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PRE_KERNEL_1, \
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CONFIG_KERNEL_INIT_PRIORITY_DEVICE, \
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&uart_rom_esp32s2_api); \
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DT_INST_FOREACH_STATUS_OKAY(ESP32S2_ROM_UART_INIT)
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32
dts/bindings/serial/espressif,esp32s2-uart.yaml
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32
dts/bindings/serial/espressif,esp32s2-uart.yaml
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@ -0,0 +1,32 @@
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description: ESP32S2 UART
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compatible: "espressif,esp32s2-uart"
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include: uart-controller.yaml
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properties:
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reg:
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required: true
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interrupts:
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required: false
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tx-pin:
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type: int
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description: TX pin
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required: false
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rx-pin:
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type: int
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description: RX pin
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required: false
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rts-pin:
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type: int
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description: RTS pin
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required: false
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cts-pin:
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type: int
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description: CTS pin
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required: false
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@ -30,6 +30,13 @@
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compatible = "mmio-sram";
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reg = <0x3ffb0000 0x50000>;
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};
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uart0: uart@3f400000 {
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compatible = "espressif,esp32s2-uart";
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reg = <0x3f400000 0x400>;
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label = "UART_0";
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status = "disabled";
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};
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};
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};
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