drivers serial native ptty: Split in top and bottom
Split the native ptty serial driver in a top and bottom to enable using it with embedded libCs. Signed-off-by: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>
This commit is contained in:
Alberto Escolar Piedras
Carles Cufí
parent
ee268a6d4b
commit
1842c602ec
7 changed files with 562 additions and 473 deletions
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@ -120,7 +120,7 @@ host libC (:kconfig:option:`CONFIG_EXTERNAL_LIBC`).
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input, input SDL touch, :kconfig:option:`CONFIG_INPUT_SDL_TOUCH`, all
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input, input SDL touch, :kconfig:option:`CONFIG_INPUT_SDL_TOUCH`, all
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log backend, native backend, :kconfig:option:`CONFIG_LOG_BACKEND_NATIVE_POSIX`, all
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log backend, native backend, :kconfig:option:`CONFIG_LOG_BACKEND_NATIVE_POSIX`, all
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rtc, RTC emul, :kconfig:option:`CONFIG_RTC_EMUL`, all
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rtc, RTC emul, :kconfig:option:`CONFIG_RTC_EMUL`, all
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serial, uart native posix/PTTY, :kconfig:option:`CONFIG_UART_NATIVE_POSIX`, host libC
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serial, uart native posix/PTTY, :kconfig:option:`CONFIG_UART_NATIVE_POSIX`, all
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serial, uart native TTY, :kconfig:option:`CONFIG_UART_NATIVE_TTY`, host libC
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serial, uart native TTY, :kconfig:option:`CONFIG_UART_NATIVE_TTY`, host libC
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spi, SPI emul, :kconfig:option:`CONFIG_SPI_EMUL`, all
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spi, SPI emul, :kconfig:option:`CONFIG_SPI_EMUL`, all
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system tick, native_posix timer, :kconfig:option:`CONFIG_NATIVE_POSIX_TIMER`, all
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system tick, native_posix timer, :kconfig:option:`CONFIG_NATIVE_POSIX_TIMER`, all
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@ -68,7 +68,12 @@ zephyr_library_sources_ifdef(CONFIG_USERSPACE uart_handlers.c)
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if(CONFIG_UART_NATIVE_POSIX)
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if(CONFIG_UART_NATIVE_POSIX)
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zephyr_library_compile_definitions(NO_POSIX_CHEATS)
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zephyr_library_compile_definitions(NO_POSIX_CHEATS)
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zephyr_library_sources(uart_native_posix.c)
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zephyr_library_sources(uart_native_ptty.c)
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if (CONFIG_NATIVE_APPLICATION)
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zephyr_library_sources(uart_native_ptty_bottom.c)
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else()
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target_sources(native_simulator INTERFACE uart_native_ptty_bottom.c)
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endif()
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endif()
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endif()
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if(CONFIG_UART_NATIVE_TTY)
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if(CONFIG_UART_NATIVE_TTY)
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@ -4,7 +4,6 @@ config UART_NATIVE_POSIX
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bool "UART driver for native_posix"
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bool "UART driver for native_posix"
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default y
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default y
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depends on DT_HAS_ZEPHYR_NATIVE_POSIX_UART_ENABLED
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depends on DT_HAS_ZEPHYR_NATIVE_POSIX_UART_ENABLED
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depends on EXTERNAL_LIBC
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select SERIAL_HAS_DRIVER
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select SERIAL_HAS_DRIVER
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help
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help
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This enables a UART driver for the POSIX ARCH with up to 2 UARTs.
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This enables a UART driver for the POSIX ARCH with up to 2 UARTs.
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@ -1,470 +0,0 @@
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/*
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* Copyright (c) 2018, Oticon A/S
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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 zephyr_native_posix_uart
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#include <errno.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <pty.h>
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#include <fcntl.h>
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#include <sys/select.h>
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#include <unistd.h>
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#include <poll.h>
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#include <zephyr/drivers/uart.h>
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#include <zephyr/kernel.h>
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#include "cmdline.h" /* native_posix command line options header */
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#include "posix_native_task.h"
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/*
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* UART driver for POSIX ARCH based boards.
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* It can support up to two UARTs.
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*
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* For the first UART:
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*
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* It can either be connected to the process STDIN+STDOUT
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* OR
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* to a dedicated pseudo terminal
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*
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* The 2nd option is the recommended one for interactive use, as the pseudo
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* terminal driver will be configured in "raw" mode, and will therefore behave
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* more like a real UART.
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*
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* When connected to its own pseudo terminal, it may also auto attach a terminal
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* emulator to it, if set so from command line.
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*/
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static int np_uart_stdin_poll_in(const struct device *dev,
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unsigned char *p_char);
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static int np_uart_tty_poll_in(const struct device *dev,
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unsigned char *p_char);
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static void np_uart_poll_out(const struct device *dev,
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unsigned char out_char);
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static bool auto_attach;
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static bool wait_pts;
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static const char default_cmd[] = CONFIG_NATIVE_UART_AUTOATTACH_DEFAULT_CMD;
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static char *auto_attach_cmd;
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struct native_uart_status {
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int out_fd; /* File descriptor used for output */
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int in_fd; /* File descriptor used for input */
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};
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static struct native_uart_status native_uart_status_0;
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static struct uart_driver_api np_uart_driver_api_0 = {
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.poll_out = np_uart_poll_out,
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.poll_in = np_uart_tty_poll_in,
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};
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#if defined(CONFIG_UART_NATIVE_POSIX_PORT_1_ENABLE)
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static struct native_uart_status native_uart_status_1;
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static struct uart_driver_api np_uart_driver_api_1 = {
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.poll_out = np_uart_poll_out,
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.poll_in = np_uart_tty_poll_in,
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};
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#endif /* CONFIG_UART_NATIVE_POSIX_PORT_1_ENABLE */
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#define ERROR posix_print_error_and_exit
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#define WARN posix_print_warning
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/**
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* Attempt to connect a terminal emulator to the slave side of the pty
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* If -attach_uart_cmd=<cmd> is provided as a command line option, <cmd> will be
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* used. Otherwise, the default command,
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* CONFIG_NATIVE_UART_AUTOATTACH_DEFAULT_CMD, will be used instead
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*/
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static void attach_to_tty(const char *slave_tty)
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{
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if (auto_attach_cmd == NULL) {
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auto_attach_cmd = (char *)default_cmd;
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}
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char command[strlen(auto_attach_cmd) + strlen(slave_tty) + 1];
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sprintf(command, auto_attach_cmd, slave_tty);
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int ret = system(command);
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if (ret != 0) {
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WARN("Could not attach to the UART with \"%s\"\n", command);
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WARN("The command returned %i\n", WEXITSTATUS(ret));
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}
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}
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/**
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* Attempt to allocate and open a new pseudoterminal
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*
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* Returns the file descriptor of the master side
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* If auto_attach was set, it will also attempt to connect a new terminal
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* emulator to its slave side.
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*/
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static int open_tty(struct native_uart_status *driver_data,
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const char *uart_name,
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bool do_auto_attach)
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{
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int master_pty;
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char *slave_pty_name;
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struct termios ter;
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struct winsize win;
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int err_nbr;
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int ret;
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int flags;
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win.ws_col = 80;
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win.ws_row = 24;
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master_pty = posix_openpt(O_RDWR | O_NOCTTY);
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if (master_pty == -1) {
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ERROR("Could not open a new TTY for the UART\n");
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}
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ret = grantpt(master_pty);
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if (ret == -1) {
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err_nbr = errno;
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close(master_pty);
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ERROR("Could not grant access to the slave PTY side (%i)\n",
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err_nbr);
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}
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ret = unlockpt(master_pty);
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if (ret == -1) {
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err_nbr = errno;
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close(master_pty);
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ERROR("Could not unlock the slave PTY side (%i)\n", err_nbr);
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}
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slave_pty_name = ptsname(master_pty);
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if (slave_pty_name == NULL) {
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err_nbr = errno;
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close(master_pty);
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ERROR("Error getting slave PTY device name (%i)\n", err_nbr);
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}
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/* Set the master PTY as non blocking */
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flags = fcntl(master_pty, F_GETFL);
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if (flags == -1) {
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err_nbr = errno;
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close(master_pty);
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ERROR("Could not read the master PTY file status flags (%i)\n",
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err_nbr);
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}
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ret = fcntl(master_pty, F_SETFL, flags | O_NONBLOCK);
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if (ret == -1) {
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err_nbr = errno;
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close(master_pty);
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ERROR("Could not set the master PTY as non-blocking (%i)\n",
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err_nbr);
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}
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(void) err_nbr;
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/*
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* Set terminal in "raw" mode:
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* Not canonical (no line input)
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* No signal generation from Ctr+{C|Z..}
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* No echoing, no input or output processing
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* No replacing of NL or CR
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* No flow control
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*/
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ret = tcgetattr(master_pty, &ter);
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if (ret == -1) {
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ERROR("Could not read terminal driver settings\n");
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}
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ter.c_cc[VMIN] = 0;
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ter.c_cc[VTIME] = 0;
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ter.c_lflag &= ~(ICANON | ISIG | IEXTEN | ECHO);
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ter.c_iflag &= ~(BRKINT | ICRNL | IGNBRK | IGNCR | INLCR | INPCK
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| ISTRIP | IXON | PARMRK);
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ter.c_oflag &= ~OPOST;
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ret = tcsetattr(master_pty, TCSANOW, &ter);
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if (ret == -1) {
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ERROR("Could not change terminal driver settings\n");
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}
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posix_print_trace("%s connected to pseudotty: %s\n",
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uart_name, slave_pty_name);
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if (wait_pts) {
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/*
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* This trick sets the HUP flag on the tty master, making it
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* possible to detect a client connection using poll.
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* The connection of the client would cause the HUP flag to be
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* cleared, and in turn set again at disconnect.
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*/
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ret = open(slave_pty_name, O_RDWR | O_NOCTTY);
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if (ret == -1) {
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err_nbr = errno;
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ERROR("%s: Could not open terminal from the slave side (%i,%s)\n",
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__func__, err_nbr, strerror(err_nbr));
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}
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ret = close(ret);
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if (ret == -1) {
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err_nbr = errno;
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ERROR("%s: Could not close terminal from the slave side (%i,%s)\n",
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__func__, err_nbr, strerror(err_nbr));
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}
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}
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if (do_auto_attach) {
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attach_to_tty(slave_pty_name);
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}
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return master_pty;
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}
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/**
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* @brief Initialize the first native_posix serial port
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*
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* @param dev UART_0 device struct
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*
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* @return 0 (if it fails catastrophically, the execution is terminated)
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*/
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static int np_uart_0_init(const struct device *dev)
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{
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struct native_uart_status *d;
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d = (struct native_uart_status *)dev->data;
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if (IS_ENABLED(CONFIG_NATIVE_UART_0_ON_OWN_PTY)) {
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int tty_fn = open_tty(d, dev->name, auto_attach);
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d->in_fd = tty_fn;
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d->out_fd = tty_fn;
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np_uart_driver_api_0.poll_in = np_uart_tty_poll_in;
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} else { /* NATIVE_UART_0_ON_STDINOUT */
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d->in_fd = STDIN_FILENO;
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d->out_fd = STDOUT_FILENO;
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np_uart_driver_api_0.poll_in = np_uart_stdin_poll_in;
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if (isatty(STDIN_FILENO)) {
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WARN("The UART driver has been configured to map to the"
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" process stdin&out (NATIVE_UART_0_ON_STDINOUT), "
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"but stdin seems to be left attached to the shell."
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" This will most likely NOT behave as you want it "
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"to. This option is NOT meant for interactive use "
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"but for piping/feeding from/to files to the UART"
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);
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}
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}
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return 0;
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}
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#if defined(CONFIG_UART_NATIVE_POSIX_PORT_1_ENABLE)
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/*
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* Initialize the 2nd UART port.
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* This port will be always attached to its own new pseudoterminal.
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*/
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static int np_uart_1_init(const struct device *dev)
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{
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struct native_uart_status *d;
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int tty_fn;
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d = (struct native_uart_status *)dev->data;
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tty_fn = open_tty(d, dev->name, false);
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d->in_fd = tty_fn;
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d->out_fd = tty_fn;
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return 0;
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}
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#endif
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/*
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* @brief Output a character towards the serial port
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*
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* @param dev UART device struct
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* @param out_char Character to send.
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*/
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static void np_uart_poll_out(const struct device *dev,
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unsigned char out_char)
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{
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int ret;
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struct native_uart_status *d = (struct native_uart_status *)dev->data;
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if (wait_pts) {
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struct pollfd pfd = { .fd = d->out_fd, .events = POLLHUP };
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while (1) {
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ret = poll(&pfd, 1, 0);
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if (ret == -1) {
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int err = errno;
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/*
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* Possible errors are:
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* * EINTR :A signal was received => ok
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* * EFAULT and EINVAL: parameters/programming error
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* * ENOMEM no RAM left
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*/
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if (err != EINTR) {
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ERROR("%s: unexpected error during poll, errno=%i,%s\n",
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__func__, err, strerror(err));
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}
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}
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if (!(pfd.revents & POLLHUP)) {
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/* There is now a reader on the slave side */
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break;
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}
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k_sleep(K_MSEC(100));
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}
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}
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/* The return value of write() cannot be ignored (there is a warning)
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* but we do not need the return value for anything.
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*/
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ret = write(d->out_fd, &out_char, 1);
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(void) ret;
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}
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/**
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* @brief Poll the device for input.
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*
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* @param dev UART device structure.
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* @param p_char Pointer to character.
|
|
||||||
*
|
|
||||||
* @retval 0 If a character arrived and was stored in p_char
|
|
||||||
* @retval -1 If no character was available to read
|
|
||||||
*/
|
|
||||||
static int np_uart_stdin_poll_in(const struct device *dev,
|
|
||||||
unsigned char *p_char)
|
|
||||||
{
|
|
||||||
static bool disconnected;
|
|
||||||
|
|
||||||
if (disconnected || feof(stdin)) {
|
|
||||||
/*
|
|
||||||
* The stdinput is fed from a file which finished or the user
|
|
||||||
* pressed Ctrl+D
|
|
||||||
*/
|
|
||||||
disconnected = true;
|
|
||||||
return -1;
|
|
||||||
}
|
|
||||||
|
|
||||||
int n = -1;
|
|
||||||
int in_f = ((struct native_uart_status *)dev->data)->in_fd;
|
|
||||||
|
|
||||||
int ready;
|
|
||||||
fd_set readfds;
|
|
||||||
static struct timeval timeout; /* just zero */
|
|
||||||
|
|
||||||
FD_ZERO(&readfds);
|
|
||||||
FD_SET(in_f, &readfds);
|
|
||||||
|
|
||||||
ready = select(in_f+1, &readfds, NULL, NULL, &timeout);
|
|
||||||
|
|
||||||
if (ready == 0) {
|
|
||||||
return -1;
|
|
||||||
} else if (ready == -1) {
|
|
||||||
ERROR("%s: Error on select ()\n", __func__);
|
|
||||||
}
|
|
||||||
|
|
||||||
n = read(in_f, p_char, 1);
|
|
||||||
if ((n == -1) || (n == 0)) {
|
|
||||||
return -1;
|
|
||||||
}
|
|
||||||
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* @brief Poll the device for input.
|
|
||||||
*
|
|
||||||
* @param dev UART device structure.
|
|
||||||
* @param p_char Pointer to character.
|
|
||||||
*
|
|
||||||
* @retval 0 If a character arrived and was stored in p_char
|
|
||||||
* @retval -1 If no character was available to read
|
|
||||||
*/
|
|
||||||
static int np_uart_tty_poll_in(const struct device *dev,
|
|
||||||
unsigned char *p_char)
|
|
||||||
{
|
|
||||||
int n = -1;
|
|
||||||
int in_f = ((struct native_uart_status *)dev->data)->in_fd;
|
|
||||||
|
|
||||||
n = read(in_f, p_char, 1);
|
|
||||||
if (n == -1) {
|
|
||||||
return -1;
|
|
||||||
}
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
DEVICE_DT_INST_DEFINE(0,
|
|
||||||
&np_uart_0_init, NULL,
|
|
||||||
(void *)&native_uart_status_0, NULL,
|
|
||||||
PRE_KERNEL_1, CONFIG_SERIAL_INIT_PRIORITY,
|
|
||||||
&np_uart_driver_api_0);
|
|
||||||
|
|
||||||
#if defined(CONFIG_UART_NATIVE_POSIX_PORT_1_ENABLE)
|
|
||||||
DEVICE_DT_INST_DEFINE(1,
|
|
||||||
&np_uart_1_init, NULL,
|
|
||||||
(void *)&native_uart_status_1, NULL,
|
|
||||||
PRE_KERNEL_1, CONFIG_SERIAL_INIT_PRIORITY,
|
|
||||||
&np_uart_driver_api_1);
|
|
||||||
#endif /* CONFIG_UART_NATIVE_POSIX_PORT_1_ENABLE */
|
|
||||||
|
|
||||||
static void auto_attach_cmd_cb(char *argv, int offset)
|
|
||||||
{
|
|
||||||
ARG_UNUSED(argv);
|
|
||||||
ARG_UNUSED(offset);
|
|
||||||
|
|
||||||
auto_attach = true;
|
|
||||||
}
|
|
||||||
|
|
||||||
static void np_add_uart_options(void)
|
|
||||||
{
|
|
||||||
if (!IS_ENABLED(CONFIG_NATIVE_UART_0_ON_OWN_PTY)) {
|
|
||||||
return;
|
|
||||||
}
|
|
||||||
|
|
||||||
static struct args_struct_t uart_options[] = {
|
|
||||||
/*
|
|
||||||
* Fields:
|
|
||||||
* manual, mandatory, switch,
|
|
||||||
* option_name, var_name ,type,
|
|
||||||
* destination, callback,
|
|
||||||
* description
|
|
||||||
*/
|
|
||||||
{false, false, true,
|
|
||||||
"attach_uart", "", 'b',
|
|
||||||
(void *)&auto_attach, NULL,
|
|
||||||
"Automatically attach to the UART terminal"},
|
|
||||||
{false, false, false,
|
|
||||||
"attach_uart_cmd", "\"cmd\"", 's',
|
|
||||||
(void *)&auto_attach_cmd, auto_attach_cmd_cb,
|
|
||||||
"Command used to automatically attach to the terminal"
|
|
||||||
"(implies auto_attach), by "
|
|
||||||
"default: '" CONFIG_NATIVE_UART_AUTOATTACH_DEFAULT_CMD "'"},
|
|
||||||
IF_ENABLED(CONFIG_UART_NATIVE_WAIT_PTS_READY_ENABLE, (
|
|
||||||
{false, false, true,
|
|
||||||
"wait_uart", "", 'b',
|
|
||||||
(void *)&wait_pts, NULL,
|
|
||||||
"Hold writes to the uart/pts until a client is "
|
|
||||||
"connected/ready"},)
|
|
||||||
)
|
|
||||||
ARG_TABLE_ENDMARKER
|
|
||||||
};
|
|
||||||
|
|
||||||
native_add_command_line_opts(uart_options);
|
|
||||||
}
|
|
||||||
|
|
||||||
static void np_cleanup_uart(void)
|
|
||||||
{
|
|
||||||
if (IS_ENABLED(CONFIG_NATIVE_UART_0_ON_OWN_PTY)) {
|
|
||||||
if (native_uart_status_0.in_fd != 0) {
|
|
||||||
close(native_uart_status_0.in_fd);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
#if defined(CONFIG_UART_NATIVE_POSIX_PORT_1_ENABLE)
|
|
||||||
if (native_uart_status_1.in_fd != 0) {
|
|
||||||
close(native_uart_status_1.in_fd);
|
|
||||||
}
|
|
||||||
#endif
|
|
||||||
}
|
|
||||||
|
|
||||||
NATIVE_TASK(np_add_uart_options, PRE_BOOT_1, 11);
|
|
||||||
NATIVE_TASK(np_cleanup_uart, ON_EXIT, 99);
|
|
||||||
279
drivers/serial/uart_native_ptty.c
Normal file
279
drivers/serial/uart_native_ptty.c
Normal file
|
|
@ -0,0 +1,279 @@
|
||||||
|
/*
|
||||||
|
* Copyright (c) 2018, Oticon A/S
|
||||||
|
*
|
||||||
|
* SPDX-License-Identifier: Apache-2.0
|
||||||
|
*/
|
||||||
|
|
||||||
|
#define DT_DRV_COMPAT zephyr_native_posix_uart
|
||||||
|
|
||||||
|
#include <stdbool.h>
|
||||||
|
|
||||||
|
#include <zephyr/drivers/uart.h>
|
||||||
|
#include <zephyr/kernel.h>
|
||||||
|
|
||||||
|
#include "cmdline.h" /* native_posix command line options header */
|
||||||
|
#include "posix_native_task.h"
|
||||||
|
#include "uart_native_ptty_bottom.h"
|
||||||
|
#include "nsi_host_trampolines.h"
|
||||||
|
|
||||||
|
/*
|
||||||
|
* UART driver for POSIX ARCH based boards.
|
||||||
|
* It can support up to two UARTs.
|
||||||
|
*
|
||||||
|
* For the first UART:
|
||||||
|
*
|
||||||
|
* It can either be connected to the process STDIN+STDOUT
|
||||||
|
* OR
|
||||||
|
* to a dedicated pseudo terminal
|
||||||
|
*
|
||||||
|
* The 2nd option is the recommended one for interactive use, as the pseudo
|
||||||
|
* terminal driver will be configured in "raw" mode, and will therefore behave
|
||||||
|
* more like a real UART.
|
||||||
|
*
|
||||||
|
* When connected to its own pseudo terminal, it may also auto attach a terminal
|
||||||
|
* emulator to it, if set so from command line.
|
||||||
|
*/
|
||||||
|
|
||||||
|
static int np_uart_stdin_poll_in(const struct device *dev,
|
||||||
|
unsigned char *p_char);
|
||||||
|
static int np_uart_tty_poll_in(const struct device *dev,
|
||||||
|
unsigned char *p_char);
|
||||||
|
static void np_uart_poll_out(const struct device *dev,
|
||||||
|
unsigned char out_char);
|
||||||
|
|
||||||
|
static bool auto_attach;
|
||||||
|
static bool wait_pts;
|
||||||
|
static char *auto_attach_cmd = CONFIG_NATIVE_UART_AUTOATTACH_DEFAULT_CMD;
|
||||||
|
|
||||||
|
struct native_uart_status {
|
||||||
|
int out_fd; /* File descriptor used for output */
|
||||||
|
int in_fd; /* File descriptor used for input */
|
||||||
|
};
|
||||||
|
|
||||||
|
static struct native_uart_status native_uart_status_0;
|
||||||
|
|
||||||
|
static struct uart_driver_api np_uart_driver_api_0 = {
|
||||||
|
.poll_out = np_uart_poll_out,
|
||||||
|
.poll_in = np_uart_tty_poll_in,
|
||||||
|
};
|
||||||
|
|
||||||
|
#if defined(CONFIG_UART_NATIVE_POSIX_PORT_1_ENABLE)
|
||||||
|
static struct native_uart_status native_uart_status_1;
|
||||||
|
|
||||||
|
static struct uart_driver_api np_uart_driver_api_1 = {
|
||||||
|
.poll_out = np_uart_poll_out,
|
||||||
|
.poll_in = np_uart_tty_poll_in,
|
||||||
|
};
|
||||||
|
#endif /* CONFIG_UART_NATIVE_POSIX_PORT_1_ENABLE */
|
||||||
|
|
||||||
|
#define ERROR posix_print_error_and_exit
|
||||||
|
#define WARN posix_print_warning
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief Initialize the first native_posix serial port
|
||||||
|
*
|
||||||
|
* @param dev UART_0 device struct
|
||||||
|
*
|
||||||
|
* @return 0 (if it fails catastrophically, the execution is terminated)
|
||||||
|
*/
|
||||||
|
static int np_uart_0_init(const struct device *dev)
|
||||||
|
{
|
||||||
|
struct native_uart_status *d;
|
||||||
|
|
||||||
|
d = (struct native_uart_status *)dev->data;
|
||||||
|
|
||||||
|
if (IS_ENABLED(CONFIG_NATIVE_UART_0_ON_OWN_PTY)) {
|
||||||
|
int tty_fn = np_uart_open_ptty(dev->name, auto_attach_cmd, auto_attach, wait_pts);
|
||||||
|
|
||||||
|
d->in_fd = tty_fn;
|
||||||
|
d->out_fd = tty_fn;
|
||||||
|
np_uart_driver_api_0.poll_in = np_uart_tty_poll_in;
|
||||||
|
} else { /* NATIVE_UART_0_ON_STDINOUT */
|
||||||
|
d->in_fd = np_uart_ptty_get_stdin_fileno();
|
||||||
|
d->out_fd = np_uart_ptty_get_stdout_fileno();
|
||||||
|
np_uart_driver_api_0.poll_in = np_uart_stdin_poll_in;
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
#if defined(CONFIG_UART_NATIVE_POSIX_PORT_1_ENABLE)
|
||||||
|
/*
|
||||||
|
* Initialize the 2nd UART port.
|
||||||
|
* This port will be always attached to its own new pseudoterminal.
|
||||||
|
*/
|
||||||
|
static int np_uart_1_init(const struct device *dev)
|
||||||
|
{
|
||||||
|
struct native_uart_status *d;
|
||||||
|
int tty_fn;
|
||||||
|
|
||||||
|
d = (struct native_uart_status *)dev->data;
|
||||||
|
|
||||||
|
tty_fn = np_uart_open_ptty(dev->name, NULL, false, wait_pts);
|
||||||
|
|
||||||
|
d->in_fd = tty_fn;
|
||||||
|
d->out_fd = tty_fn;
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/*
|
||||||
|
* @brief Output a character towards the serial port
|
||||||
|
*
|
||||||
|
* @param dev UART device struct
|
||||||
|
* @param out_char Character to send.
|
||||||
|
*/
|
||||||
|
static void np_uart_poll_out(const struct device *dev,
|
||||||
|
unsigned char out_char)
|
||||||
|
{
|
||||||
|
int ret;
|
||||||
|
struct native_uart_status *d = (struct native_uart_status *)dev->data;
|
||||||
|
|
||||||
|
if (wait_pts) {
|
||||||
|
|
||||||
|
while (1) {
|
||||||
|
int rc = np_uart_slave_connected(d->out_fd);
|
||||||
|
|
||||||
|
if (rc == 1) {
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
k_sleep(K_MSEC(100));
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/* The return value of write() cannot be ignored (there is a warning)
|
||||||
|
* but we do not need the return value for anything.
|
||||||
|
*/
|
||||||
|
ret = nsi_host_write(d->out_fd, &out_char, 1);
|
||||||
|
(void) ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief Poll the device for input.
|
||||||
|
*
|
||||||
|
* @param dev UART device structure.
|
||||||
|
* @param p_char Pointer to character.
|
||||||
|
*
|
||||||
|
* @retval 0 If a character arrived and was stored in p_char
|
||||||
|
* @retval -1 If no character was available to read
|
||||||
|
*/
|
||||||
|
static int np_uart_stdin_poll_in(const struct device *dev,
|
||||||
|
unsigned char *p_char)
|
||||||
|
{
|
||||||
|
int in_f = ((struct native_uart_status *)dev->data)->in_fd;
|
||||||
|
static bool disconnected;
|
||||||
|
int rc;
|
||||||
|
|
||||||
|
if (disconnected == true) {
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
rc = np_uart_stdin_poll_in_bottom(in_f, p_char);
|
||||||
|
if (rc == -2) {
|
||||||
|
disconnected = true;
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
return rc;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief Poll the device for input.
|
||||||
|
*
|
||||||
|
* @param dev UART device structure.
|
||||||
|
* @param p_char Pointer to character.
|
||||||
|
*
|
||||||
|
* @retval 0 If a character arrived and was stored in p_char
|
||||||
|
* @retval -1 If no character was available to read
|
||||||
|
*/
|
||||||
|
static int np_uart_tty_poll_in(const struct device *dev,
|
||||||
|
unsigned char *p_char)
|
||||||
|
{
|
||||||
|
int n = -1;
|
||||||
|
int in_f = ((struct native_uart_status *)dev->data)->in_fd;
|
||||||
|
|
||||||
|
n = nsi_host_read(in_f, p_char, 1);
|
||||||
|
if (n == -1) {
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
DEVICE_DT_INST_DEFINE(0,
|
||||||
|
&np_uart_0_init, NULL,
|
||||||
|
(void *)&native_uart_status_0, NULL,
|
||||||
|
PRE_KERNEL_1, CONFIG_SERIAL_INIT_PRIORITY,
|
||||||
|
&np_uart_driver_api_0);
|
||||||
|
|
||||||
|
#if defined(CONFIG_UART_NATIVE_POSIX_PORT_1_ENABLE)
|
||||||
|
DEVICE_DT_INST_DEFINE(1,
|
||||||
|
&np_uart_1_init, NULL,
|
||||||
|
(void *)&native_uart_status_1, NULL,
|
||||||
|
PRE_KERNEL_1, CONFIG_SERIAL_INIT_PRIORITY,
|
||||||
|
&np_uart_driver_api_1);
|
||||||
|
#endif /* CONFIG_UART_NATIVE_POSIX_PORT_1_ENABLE */
|
||||||
|
|
||||||
|
static void auto_attach_cmd_cb(char *argv, int offset)
|
||||||
|
{
|
||||||
|
auto_attach_cmd = &argv[offset];
|
||||||
|
auto_attach = true;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void np_add_uart_options(void)
|
||||||
|
{
|
||||||
|
if (!IS_ENABLED(CONFIG_NATIVE_UART_0_ON_OWN_PTY)) {
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
static struct args_struct_t uart_options[] = {
|
||||||
|
{
|
||||||
|
.is_switch = true,
|
||||||
|
.option = "attach_uart",
|
||||||
|
.type = 'b',
|
||||||
|
.dest = (void *)&auto_attach,
|
||||||
|
.descript = "Automatically attach to the UART terminal"
|
||||||
|
},
|
||||||
|
{
|
||||||
|
.option = "attach_uart_cmd",
|
||||||
|
.name = "\"cmd\"",
|
||||||
|
.type = 's',
|
||||||
|
.call_when_found = auto_attach_cmd_cb,
|
||||||
|
.descript = "Command used to automatically attach to the terminal (implies "
|
||||||
|
"auto_attach), by default: "
|
||||||
|
"'" CONFIG_NATIVE_UART_AUTOATTACH_DEFAULT_CMD "'"
|
||||||
|
},
|
||||||
|
IF_ENABLED(CONFIG_UART_NATIVE_WAIT_PTS_READY_ENABLE, (
|
||||||
|
{
|
||||||
|
.is_switch = true,
|
||||||
|
.option = "wait_uart",
|
||||||
|
.type = 'b',
|
||||||
|
.dest = (void *)&wait_pts,
|
||||||
|
.descript = "Hold writes to the uart/pts until a client is connected/ready"
|
||||||
|
},
|
||||||
|
))
|
||||||
|
ARG_TABLE_ENDMARKER
|
||||||
|
};
|
||||||
|
|
||||||
|
native_add_command_line_opts(uart_options);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void np_cleanup_uart(void)
|
||||||
|
{
|
||||||
|
if (IS_ENABLED(CONFIG_NATIVE_UART_0_ON_OWN_PTY)) {
|
||||||
|
if (native_uart_status_0.in_fd != 0) {
|
||||||
|
nsi_host_close(native_uart_status_0.in_fd);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
#if defined(CONFIG_UART_NATIVE_POSIX_PORT_1_ENABLE)
|
||||||
|
if (native_uart_status_1.in_fd != 0) {
|
||||||
|
nsi_host_close(native_uart_status_1.in_fd);
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
|
||||||
|
NATIVE_TASK(np_add_uart_options, PRE_BOOT_1, 11);
|
||||||
|
NATIVE_TASK(np_cleanup_uart, ON_EXIT, 99);
|
||||||
242
drivers/serial/uart_native_ptty_bottom.c
Normal file
242
drivers/serial/uart_native_ptty_bottom.c
Normal file
|
|
@ -0,0 +1,242 @@
|
||||||
|
/*
|
||||||
|
* Copyright (c) 2018, Oticon A/S
|
||||||
|
* Copyright (c) 2023, Nordic Semiconductor ASA
|
||||||
|
*
|
||||||
|
* SPDX-License-Identifier: Apache-2.0
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <stdbool.h>
|
||||||
|
#include <errno.h>
|
||||||
|
#include <stddef.h>
|
||||||
|
#include <stdlib.h>
|
||||||
|
#include <stdio.h>
|
||||||
|
#include <string.h>
|
||||||
|
#include <pty.h>
|
||||||
|
#include <fcntl.h>
|
||||||
|
#include <sys/select.h>
|
||||||
|
#include <unistd.h>
|
||||||
|
#include <poll.h>
|
||||||
|
#include <nsi_tracing.h>
|
||||||
|
|
||||||
|
#define ERROR nsi_print_error_and_exit
|
||||||
|
#define WARN nsi_print_warning
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief Poll the device for input.
|
||||||
|
*
|
||||||
|
* @param in_f Input file descriptor
|
||||||
|
* @param p_char Pointer to character.
|
||||||
|
*
|
||||||
|
* @retval 0 If a character arrived and was stored in p_char
|
||||||
|
* @retval -1 If no character was available to read
|
||||||
|
* @retval -2 if the stdin is disconnected
|
||||||
|
*/
|
||||||
|
int np_uart_stdin_poll_in_bottom(int in_f, unsigned char *p_char)
|
||||||
|
{
|
||||||
|
if (feof(stdin)) {
|
||||||
|
/*
|
||||||
|
* The stdinput is fed from a file which finished or the user
|
||||||
|
* pressed Ctrl+D
|
||||||
|
*/
|
||||||
|
return -2;
|
||||||
|
}
|
||||||
|
|
||||||
|
int n = -1;
|
||||||
|
|
||||||
|
int ready;
|
||||||
|
fd_set readfds;
|
||||||
|
static struct timeval timeout; /* just zero */
|
||||||
|
|
||||||
|
FD_ZERO(&readfds);
|
||||||
|
FD_SET(in_f, &readfds);
|
||||||
|
|
||||||
|
ready = select(in_f+1, &readfds, NULL, NULL, &timeout);
|
||||||
|
|
||||||
|
if (ready == 0) {
|
||||||
|
return -1;
|
||||||
|
} else if (ready == -1) {
|
||||||
|
ERROR("%s: Error on select ()\n", __func__);
|
||||||
|
}
|
||||||
|
|
||||||
|
n = read(in_f, p_char, 1);
|
||||||
|
if ((n == -1) || (n == 0)) {
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief Check if the output descriptor has something connected to the slave side
|
||||||
|
*
|
||||||
|
* @param fd file number
|
||||||
|
*
|
||||||
|
* @retval 0 Nothing connected yet
|
||||||
|
* @retval 1 Something connected to the slave side
|
||||||
|
*/
|
||||||
|
int np_uart_slave_connected(int fd)
|
||||||
|
{
|
||||||
|
struct pollfd pfd = { .fd = fd, .events = POLLHUP };
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
ret = poll(&pfd, 1, 0);
|
||||||
|
if (ret == -1) {
|
||||||
|
int err = errno;
|
||||||
|
/*
|
||||||
|
* Possible errors are:
|
||||||
|
* * EINTR :A signal was received => ok
|
||||||
|
* * EFAULT and EINVAL: parameters/programming error
|
||||||
|
* * ENOMEM no RAM left
|
||||||
|
*/
|
||||||
|
if (err != EINTR) {
|
||||||
|
ERROR("%s: unexpected error during poll, errno=%i,%s\n",
|
||||||
|
__func__, err, strerror(err));
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if (!(pfd.revents & POLLHUP)) {
|
||||||
|
/* There is now a reader on the slave side */
|
||||||
|
return 1;
|
||||||
|
}
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Attempt to connect a terminal emulator to the slave side of the pty
|
||||||
|
* If -attach_uart_cmd=<cmd> is provided as a command line option, <cmd> will be
|
||||||
|
* used. Otherwise, the default command,
|
||||||
|
* CONFIG_NATIVE_UART_AUTOATTACH_DEFAULT_CMD, will be used instead
|
||||||
|
*/
|
||||||
|
static void attach_to_tty(const char *slave_tty, const char *auto_attach_cmd)
|
||||||
|
{
|
||||||
|
char command[strlen(auto_attach_cmd) + strlen(slave_tty) + 1];
|
||||||
|
|
||||||
|
sprintf(command, auto_attach_cmd, slave_tty);
|
||||||
|
|
||||||
|
int ret = system(command);
|
||||||
|
|
||||||
|
if (ret != 0) {
|
||||||
|
WARN("Could not attach to the UART with \"%s\"\n", command);
|
||||||
|
WARN("The command returned %i\n", WEXITSTATUS(ret));
|
||||||
|
}
|
||||||
|
}
|
||||||
|
/**
|
||||||
|
* Attempt to allocate and open a new pseudoterminal
|
||||||
|
*
|
||||||
|
* Returns the file descriptor of the master side
|
||||||
|
* If auto_attach was set, it will also attempt to connect a new terminal
|
||||||
|
* emulator to its slave side.
|
||||||
|
*/
|
||||||
|
int np_uart_open_ptty(const char *uart_name, const char *auto_attach_cmd,
|
||||||
|
bool do_auto_attach, bool wait_pts)
|
||||||
|
{
|
||||||
|
int master_pty;
|
||||||
|
char *slave_pty_name;
|
||||||
|
struct termios ter;
|
||||||
|
int err_nbr;
|
||||||
|
int ret;
|
||||||
|
int flags;
|
||||||
|
|
||||||
|
master_pty = posix_openpt(O_RDWR | O_NOCTTY);
|
||||||
|
if (master_pty == -1) {
|
||||||
|
ERROR("Could not open a new TTY for the UART\n");
|
||||||
|
}
|
||||||
|
ret = grantpt(master_pty);
|
||||||
|
if (ret == -1) {
|
||||||
|
err_nbr = errno;
|
||||||
|
close(master_pty);
|
||||||
|
ERROR("Could not grant access to the slave PTY side (%i)\n",
|
||||||
|
err_nbr);
|
||||||
|
}
|
||||||
|
ret = unlockpt(master_pty);
|
||||||
|
if (ret == -1) {
|
||||||
|
err_nbr = errno;
|
||||||
|
close(master_pty);
|
||||||
|
ERROR("Could not unlock the slave PTY side (%i)\n", err_nbr);
|
||||||
|
}
|
||||||
|
slave_pty_name = ptsname(master_pty);
|
||||||
|
if (slave_pty_name == NULL) {
|
||||||
|
err_nbr = errno;
|
||||||
|
close(master_pty);
|
||||||
|
ERROR("Error getting slave PTY device name (%i)\n", err_nbr);
|
||||||
|
}
|
||||||
|
/* Set the master PTY as non blocking */
|
||||||
|
flags = fcntl(master_pty, F_GETFL);
|
||||||
|
if (flags == -1) {
|
||||||
|
err_nbr = errno;
|
||||||
|
close(master_pty);
|
||||||
|
ERROR("Could not read the master PTY file status flags (%i)\n",
|
||||||
|
err_nbr);
|
||||||
|
}
|
||||||
|
|
||||||
|
ret = fcntl(master_pty, F_SETFL, flags | O_NONBLOCK);
|
||||||
|
if (ret == -1) {
|
||||||
|
err_nbr = errno;
|
||||||
|
close(master_pty);
|
||||||
|
ERROR("Could not set the master PTY as non-blocking (%i)\n",
|
||||||
|
err_nbr);
|
||||||
|
}
|
||||||
|
|
||||||
|
(void) err_nbr;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Set terminal in "raw" mode:
|
||||||
|
* Not canonical (no line input)
|
||||||
|
* No signal generation from Ctr+{C|Z..}
|
||||||
|
* No echoing, no input or output processing
|
||||||
|
* No replacing of NL or CR
|
||||||
|
* No flow control
|
||||||
|
*/
|
||||||
|
ret = tcgetattr(master_pty, &ter);
|
||||||
|
if (ret == -1) {
|
||||||
|
ERROR("Could not read terminal driver settings\n");
|
||||||
|
}
|
||||||
|
ter.c_cc[VMIN] = 0;
|
||||||
|
ter.c_cc[VTIME] = 0;
|
||||||
|
ter.c_lflag &= ~(ICANON | ISIG | IEXTEN | ECHO);
|
||||||
|
ter.c_iflag &= ~(BRKINT | ICRNL | IGNBRK | IGNCR | INLCR | INPCK
|
||||||
|
| ISTRIP | IXON | PARMRK);
|
||||||
|
ter.c_oflag &= ~OPOST;
|
||||||
|
ret = tcsetattr(master_pty, TCSANOW, &ter);
|
||||||
|
if (ret == -1) {
|
||||||
|
ERROR("Could not change terminal driver settings\n");
|
||||||
|
}
|
||||||
|
|
||||||
|
nsi_print_trace("%s connected to pseudotty: %s\n",
|
||||||
|
uart_name, slave_pty_name);
|
||||||
|
|
||||||
|
if (wait_pts) {
|
||||||
|
/*
|
||||||
|
* This trick sets the HUP flag on the tty master, making it
|
||||||
|
* possible to detect a client connection using poll.
|
||||||
|
* The connection of the client would cause the HUP flag to be
|
||||||
|
* cleared, and in turn set again at disconnect.
|
||||||
|
*/
|
||||||
|
ret = open(slave_pty_name, O_RDWR | O_NOCTTY);
|
||||||
|
if (ret == -1) {
|
||||||
|
err_nbr = errno;
|
||||||
|
ERROR("%s: Could not open terminal from the slave side (%i,%s)\n",
|
||||||
|
__func__, err_nbr, strerror(err_nbr));
|
||||||
|
}
|
||||||
|
ret = close(ret);
|
||||||
|
if (ret == -1) {
|
||||||
|
err_nbr = errno;
|
||||||
|
ERROR("%s: Could not close terminal from the slave side (%i,%s)\n",
|
||||||
|
__func__, err_nbr, strerror(err_nbr));
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if (do_auto_attach) {
|
||||||
|
attach_to_tty(slave_pty_name, auto_attach_cmd);
|
||||||
|
}
|
||||||
|
|
||||||
|
return master_pty;
|
||||||
|
}
|
||||||
|
|
||||||
|
int np_uart_ptty_get_stdin_fileno(void)
|
||||||
|
{
|
||||||
|
return STDIN_FILENO;
|
||||||
|
}
|
||||||
|
|
||||||
|
int np_uart_ptty_get_stdout_fileno(void)
|
||||||
|
{
|
||||||
|
return STDOUT_FILENO;
|
||||||
|
}
|
||||||
34
drivers/serial/uart_native_ptty_bottom.h
Normal file
34
drivers/serial/uart_native_ptty_bottom.h
Normal file
|
|
@ -0,0 +1,34 @@
|
||||||
|
/*
|
||||||
|
* Copyright (c) 2023, Nordic Semiconductor ASA
|
||||||
|
*
|
||||||
|
* SPDX-License-Identifier: Apache-2.0
|
||||||
|
*
|
||||||
|
* "Bottom" of native ptty uart driver
|
||||||
|
* When built with the native_simulator this will be built in the runner context,
|
||||||
|
* that is, with the host C library, and with the host include paths.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef DRIVERS_SERIAL_UART_NATIVE_PTTY_BOTTOM_H
|
||||||
|
#define DRIVERS_SERIAL_UART_NATIVE_PTTY_BOTTOM_H
|
||||||
|
|
||||||
|
#include <stdbool.h>
|
||||||
|
#include <stdint.h>
|
||||||
|
|
||||||
|
#ifdef __cplusplus
|
||||||
|
extern "C" {
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/* Note: None of these functions are public interfaces. But internal to the native ptty driver */
|
||||||
|
|
||||||
|
int np_uart_stdin_poll_in_bottom(int in_f, unsigned char *p_char);
|
||||||
|
int np_uart_slave_connected(int fd);
|
||||||
|
int np_uart_open_ptty(const char *uart_name, const char *auto_attach_cmd,
|
||||||
|
bool do_auto_attach, bool wait_pts);
|
||||||
|
int np_uart_ptty_get_stdin_fileno(void);
|
||||||
|
int np_uart_ptty_get_stdout_fileno(void);
|
||||||
|
|
||||||
|
#ifdef __cplusplus
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#endif /* DRIVERS_SERIAL_UART_NATIVE_PTTY_BOTTOM_H */
|
||||||
Loading…
Add table
Add a link
Reference in a new issue