GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2011 The Chromium OS Authors.
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*/
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/*
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* This provide a test serial port. It provides an emulated serial port where
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* a test program and read out the serial output and inject serial input for
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* U-Boot.
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*/
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#include <common.h>
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#include <console.h>
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#include <dm.h>
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#include <fdtdec.h>
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#include <lcd.h>
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#include <os.h>
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#include <serial.h>
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#include <video.h>
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#include <linux/compiler.h>
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#include <asm/state.h>
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DECLARE_GLOBAL_DATA_PTR;
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#if CONFIG_IS_ENABLED(OF_CONTROL)
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/*
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*
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* serial_buf: A buffer that holds keyboard characters for the
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* Sandbox U-Boot.
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*
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* invariants:
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* serial_buf_write == serial_buf_read -> empty buffer
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* (serial_buf_write + 1) % 16 == serial_buf_read -> full buffer
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*/
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static char serial_buf[16];
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static unsigned int serial_buf_write;
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static unsigned int serial_buf_read;
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struct sandbox_serial_platdata {
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int colour; /* Text colour to use for output, -1 for none */
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};
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struct sandbox_serial_priv {
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bool start_of_line;
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};
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/**
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* output_ansi_colour() - Output an ANSI colour code
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*
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* @colour: Colour to output (0-7)
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*/
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static void output_ansi_colour(int colour)
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{
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char ansi_code[] = "\x1b[1;3Xm";
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ansi_code[5] = '0' + colour;
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os_write(1, ansi_code, sizeof(ansi_code) - 1);
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}
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static void output_ansi_reset(void)
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{
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os_write(1, "\x1b[0m", 4);
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}
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static int sandbox_serial_probe(struct udevice *dev)
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{
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struct sandbox_state *state = state_get_current();
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struct sandbox_serial_priv *priv = dev_get_priv(dev);
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if (state->term_raw != STATE_TERM_COOKED)
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os_tty_raw(0, state->term_raw == STATE_TERM_RAW_WITH_SIGS);
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priv->start_of_line = 0;
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if (state->term_raw != STATE_TERM_RAW)
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disable_ctrlc(1);
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return 0;
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}
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static int sandbox_serial_remove(struct udevice *dev)
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{
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struct sandbox_serial_platdata *plat = dev->platdata;
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if (plat->colour != -1)
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output_ansi_reset();
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return 0;
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}
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static int sandbox_serial_putc(struct udevice *dev, const char ch)
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{
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struct sandbox_serial_priv *priv = dev_get_priv(dev);
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struct sandbox_serial_platdata *plat = dev->platdata;
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if (priv->start_of_line && plat->colour != -1) {
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priv->start_of_line = false;
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output_ansi_colour(plat->colour);
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}
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os_write(1, &ch, 1);
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if (ch == '\n')
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priv->start_of_line = true;
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return 0;
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}
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static unsigned int increment_buffer_index(unsigned int index)
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{
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return (index + 1) % ARRAY_SIZE(serial_buf);
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}
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static int sandbox_serial_pending(struct udevice *dev, bool input)
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{
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const unsigned int next_index =
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increment_buffer_index(serial_buf_write);
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ssize_t count;
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if (!input)
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return 0;
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os_usleep(100);
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#ifndef CONFIG_SPL_BUILD
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video_sync_all();
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#endif
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if (next_index == serial_buf_read)
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return 1; /* buffer full */
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count = os_read(0, &serial_buf[serial_buf_write], 1);
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if (count == 1)
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serial_buf_write = next_index;
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return serial_buf_write != serial_buf_read;
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}
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static int sandbox_serial_getc(struct udevice *dev)
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{
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int result;
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if (!sandbox_serial_pending(dev, true))
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return -EAGAIN; /* buffer empty */
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result = serial_buf[serial_buf_read];
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serial_buf_read = increment_buffer_index(serial_buf_read);
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return result;
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}
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#endif /* CONFIG_IS_ENABLED(OF_CONTROL) */
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#ifdef CONFIG_DEBUG_UART_SANDBOX
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#include <debug_uart.h>
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static inline void _debug_uart_init(void)
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{
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}
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static inline void _debug_uart_putc(int ch)
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{
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os_putc(ch);
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}
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DEBUG_UART_FUNCS
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#endif /* CONFIG_DEBUG_UART_SANDBOX */
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static int sandbox_serial_getconfig(struct udevice *dev, uint *serial_config)
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{
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uint config = SERIAL_DEFAULT_CONFIG;
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if (!serial_config)
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return -EINVAL;
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*serial_config = config;
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return 0;
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}
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static int sandbox_serial_setconfig(struct udevice *dev, uint serial_config)
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{
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u8 parity = SERIAL_GET_PARITY(serial_config);
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u8 bits = SERIAL_GET_BITS(serial_config);
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u8 stop = SERIAL_GET_STOP(serial_config);
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if (bits != SERIAL_8_BITS || stop != SERIAL_ONE_STOP ||
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parity != SERIAL_PAR_NONE)
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return -ENOTSUPP; /* not supported in driver*/
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return 0;
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}
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static int sandbox_serial_getinfo(struct udevice *dev,
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struct serial_device_info *serial_info)
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{
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struct serial_device_info info = {
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.type = SERIAL_CHIP_UNKNOWN,
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.addr_space = SERIAL_ADDRESS_SPACE_IO,
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.addr = SERIAL_DEFAULT_ADDRESS,
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.reg_width = 1,
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.reg_offset = 0,
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.reg_shift = 0,
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};
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if (!serial_info)
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return -EINVAL;
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*serial_info = info;
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return 0;
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}
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#if CONFIG_IS_ENABLED(OF_CONTROL)
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static const char * const ansi_colour[] = {
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"black", "red", "green", "yellow", "blue", "megenta", "cyan",
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"white",
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};
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static int sandbox_serial_ofdata_to_platdata(struct udevice *dev)
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{
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struct sandbox_serial_platdata *plat = dev->platdata;
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const char *colour;
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int i;
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if (CONFIG_IS_ENABLED(OF_PLATDATA))
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return 0;
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plat->colour = -1;
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colour = fdt_getprop(gd->fdt_blob, dev_of_offset(dev),
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"sandbox,text-colour", NULL);
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if (colour) {
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for (i = 0; i < ARRAY_SIZE(ansi_colour); i++) {
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if (!strcmp(colour, ansi_colour[i])) {
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plat->colour = i;
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break;
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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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static const struct dm_serial_ops sandbox_serial_ops = {
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.putc = sandbox_serial_putc,
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.pending = sandbox_serial_pending,
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.getc = sandbox_serial_getc,
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.getconfig = sandbox_serial_getconfig,
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.setconfig = sandbox_serial_setconfig,
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.getinfo = sandbox_serial_getinfo,
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};
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static const struct udevice_id sandbox_serial_ids[] = {
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{ .compatible = "sandbox,serial" },
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{ }
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};
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U_BOOT_DRIVER(serial_sandbox) = {
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.name = "serial_sandbox",
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.id = UCLASS_SERIAL,
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.of_match = sandbox_serial_ids,
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.ofdata_to_platdata = sandbox_serial_ofdata_to_platdata,
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.platdata_auto_alloc_size = sizeof(struct sandbox_serial_platdata),
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.priv_auto_alloc_size = sizeof(struct sandbox_serial_priv),
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.probe = sandbox_serial_probe,
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.remove = sandbox_serial_remove,
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.ops = &sandbox_serial_ops,
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.flags = DM_FLAG_PRE_RELOC,
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};
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static const struct sandbox_serial_platdata platdata_non_fdt = {
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.colour = -1,
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};
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U_BOOT_DEVICE(serial_sandbox_non_fdt) = {
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.name = "serial_sandbox",
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.platdata = &platdata_non_fdt,
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};
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#endif /* CONFIG_IS_ENABLED(OF_CONTROL) */
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