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- // 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 <common.h>
- #include <console.h>
- #include <dm.h>
- #include <lcd.h>
- #include <os.h>
- #include <serial.h>
- #include <video.h>
- #include <asm/global_data.h>
- #include <linux/compiler.h>
- #include <asm/serial.h>
- #include <asm/state.h>
- DECLARE_GLOBAL_DATA_PTR;
- /**
- * 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);
- membuff_init(&priv->buf, priv->serial_buf, sizeof(priv->serial_buf));
- return 0;
- }
- static int sandbox_serial_remove(struct udevice *dev)
- {
- struct sandbox_serial_plat *plat = dev_get_plat(dev);
- 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_plat *plat = dev_get_plat(dev);
- /* 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 int sandbox_serial_pending(struct udevice *dev, bool input)
- {
- struct sandbox_serial_priv *priv = dev_get_priv(dev);
- ssize_t count;
- char *data;
- int avail;
- if (!input)
- return 0;
- os_usleep(100);
- if (!IS_ENABLED(CONFIG_SPL_BUILD))
- video_sync_all();
- avail = membuff_putraw(&priv->buf, 100, false, &data);
- if (!avail)
- return 1; /* buffer full */
- count = os_read(0, data, avail);
- if (count > 0)
- membuff_putraw(&priv->buf, count, true, &data);
- return membuff_avail(&priv->buf);
- }
- static int sandbox_serial_getc(struct udevice *dev)
- {
- struct sandbox_serial_priv *priv = dev_get_priv(dev);
- if (!sandbox_serial_pending(dev, true))
- return -EAGAIN; /* buffer empty */
- return membuff_getbyte(&priv->buf);
- }
- #ifdef CONFIG_DEBUG_UART_SANDBOX
- #include <debug_uart.h>
- 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;
- }
- static const char * const ansi_colour[] = {
- "black", "red", "green", "yellow", "blue", "megenta", "cyan",
- "white",
- };
- static int sandbox_serial_of_to_plat(struct udevice *dev)
- {
- struct sandbox_serial_plat *plat = dev_get_plat(dev);
- const char *colour;
- int i;
- if (CONFIG_IS_ENABLED(OF_PLATDATA))
- return 0;
- plat->colour = -1;
- colour = dev_read_string(dev, "sandbox,text-colour");
- 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,
- .of_to_plat = sandbox_serial_of_to_plat,
- .plat_auto = sizeof(struct sandbox_serial_plat),
- .priv_auto = sizeof(struct sandbox_serial_priv),
- .probe = sandbox_serial_probe,
- .remove = sandbox_serial_remove,
- .ops = &sandbox_serial_ops,
- .flags = DM_FLAG_PRE_RELOC,
- };
- #if !CONFIG_IS_ENABLED(OF_PLATDATA)
- static const struct sandbox_serial_plat platdata_non_fdt = {
- .colour = -1,
- };
- U_BOOT_DRVINFO(serial_sandbox_non_fdt) = {
- .name = "sandbox_serial",
- .plat = &platdata_non_fdt,
- };
- #endif
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