// SPDX-License-Identifier: GPL-2.0+ /* * Copyright (c) 2011 The Chromium OS Authors. */ /* * This provide a test serial port. It provides an emulated serial port where * a test program and read out the serial output and inject serial input for * U-Boot. */ #include #include #include #include #include #include #include #include #include #include DECLARE_GLOBAL_DATA_PTR; #if CONFIG_IS_ENABLED(OF_CONTROL) /* * * serial_buf: A buffer that holds keyboard characters for the * Sandbox U-Boot. * * invariants: * serial_buf_write == serial_buf_read -> empty buffer * (serial_buf_write + 1) % 16 == serial_buf_read -> full buffer */ static unsigned char serial_buf[16]; static unsigned int serial_buf_write; static unsigned int serial_buf_read; struct sandbox_serial_platdata { int colour; /* Text colour to use for output, -1 for none */ }; struct sandbox_serial_priv { bool start_of_line; }; /** * output_ansi_colour() - Output an ANSI colour code * * @colour: Colour to output (0-7) */ static void output_ansi_colour(int colour) { char ansi_code[] = "\x1b[1;3Xm"; ansi_code[5] = '0' + colour; os_write(1, ansi_code, sizeof(ansi_code) - 1); } static void output_ansi_reset(void) { os_write(1, "\x1b[0m", 4); } static int sandbox_serial_probe(struct udevice *dev) { struct sandbox_state *state = state_get_current(); struct sandbox_serial_priv *priv = dev_get_priv(dev); if (state->term_raw != STATE_TERM_COOKED) os_tty_raw(0, state->term_raw == STATE_TERM_RAW_WITH_SIGS); priv->start_of_line = 0; if (state->term_raw != STATE_TERM_RAW) disable_ctrlc(1); return 0; } static int sandbox_serial_remove(struct udevice *dev) { struct sandbox_serial_platdata *plat = dev->platdata; if (plat->colour != -1) output_ansi_reset(); return 0; } static int sandbox_serial_putc(struct udevice *dev, const char ch) { struct sandbox_serial_priv *priv = dev_get_priv(dev); struct sandbox_serial_platdata *plat = dev->platdata; /* With of-platdata we don't real the colour correctly, so disable it */ if (!CONFIG_IS_ENABLED(OF_PLATDATA) && priv->start_of_line && plat->colour != -1) { priv->start_of_line = false; output_ansi_colour(plat->colour); } os_write(1, &ch, 1); if (ch == '\n') priv->start_of_line = true; return 0; } static unsigned int increment_buffer_index(unsigned int index) { return (index + 1) % ARRAY_SIZE(serial_buf); } static int sandbox_serial_pending(struct udevice *dev, bool input) { const unsigned int next_index = increment_buffer_index(serial_buf_write); ssize_t count; if (!input) return 0; os_usleep(100); #ifndef CONFIG_SPL_BUILD video_sync_all(); #endif if (next_index == serial_buf_read) return 1; /* buffer full */ count = os_read(0, &serial_buf[serial_buf_write], 1); if (count == 1) serial_buf_write = next_index; return serial_buf_write != serial_buf_read; } static int sandbox_serial_getc(struct udevice *dev) { int result; if (!sandbox_serial_pending(dev, true)) return -EAGAIN; /* buffer empty */ result = serial_buf[serial_buf_read]; serial_buf_read = increment_buffer_index(serial_buf_read); return result; } #endif /* CONFIG_IS_ENABLED(OF_CONTROL) */ #ifdef CONFIG_DEBUG_UART_SANDBOX #include static inline void _debug_uart_init(void) { } static inline void _debug_uart_putc(int ch) { os_putc(ch); } DEBUG_UART_FUNCS #endif /* CONFIG_DEBUG_UART_SANDBOX */ static int sandbox_serial_getconfig(struct udevice *dev, uint *serial_config) { uint config = SERIAL_DEFAULT_CONFIG; if (!serial_config) return -EINVAL; *serial_config = config; return 0; } static int sandbox_serial_setconfig(struct udevice *dev, uint serial_config) { u8 parity = SERIAL_GET_PARITY(serial_config); u8 bits = SERIAL_GET_BITS(serial_config); u8 stop = SERIAL_GET_STOP(serial_config); if (bits != SERIAL_8_BITS || stop != SERIAL_ONE_STOP || parity != SERIAL_PAR_NONE) return -ENOTSUPP; /* not supported in driver*/ return 0; } static int sandbox_serial_getinfo(struct udevice *dev, struct serial_device_info *serial_info) { struct serial_device_info info = { .type = SERIAL_CHIP_UNKNOWN, .addr_space = SERIAL_ADDRESS_SPACE_IO, .addr = SERIAL_DEFAULT_ADDRESS, .reg_width = 1, .reg_offset = 0, .reg_shift = 0, .clock = SERIAL_DEFAULT_CLOCK, }; if (!serial_info) return -EINVAL; *serial_info = info; return 0; } #if CONFIG_IS_ENABLED(OF_CONTROL) static const char * const ansi_colour[] = { "black", "red", "green", "yellow", "blue", "megenta", "cyan", "white", }; static int sandbox_serial_ofdata_to_platdata(struct udevice *dev) { struct sandbox_serial_platdata *plat = dev->platdata; const char *colour; int i; if (CONFIG_IS_ENABLED(OF_PLATDATA)) return 0; plat->colour = -1; colour = fdt_getprop(gd->fdt_blob, dev_of_offset(dev), "sandbox,text-colour", NULL); if (colour) { for (i = 0; i < ARRAY_SIZE(ansi_colour); i++) { if (!strcmp(colour, ansi_colour[i])) { plat->colour = i; break; } } } return 0; } static const struct dm_serial_ops sandbox_serial_ops = { .putc = sandbox_serial_putc, .pending = sandbox_serial_pending, .getc = sandbox_serial_getc, .getconfig = sandbox_serial_getconfig, .setconfig = sandbox_serial_setconfig, .getinfo = sandbox_serial_getinfo, }; static const struct udevice_id sandbox_serial_ids[] = { { .compatible = "sandbox,serial" }, { } }; U_BOOT_DRIVER(sandbox_serial) = { .name = "sandbox_serial", .id = UCLASS_SERIAL, .of_match = sandbox_serial_ids, .ofdata_to_platdata = sandbox_serial_ofdata_to_platdata, .platdata_auto_alloc_size = sizeof(struct sandbox_serial_platdata), .priv_auto_alloc_size = sizeof(struct sandbox_serial_priv), .probe = sandbox_serial_probe, .remove = sandbox_serial_remove, .ops = &sandbox_serial_ops, .flags = DM_FLAG_PRE_RELOC, }; static const struct sandbox_serial_platdata platdata_non_fdt = { .colour = -1, }; U_BOOT_DEVICE(serial_sandbox_non_fdt) = { .name = "sandbox_serial", .platdata = &platdata_non_fdt, }; #endif /* CONFIG_IS_ENABLED(OF_CONTROL) */