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https://github.com/brain-hackers/u-boot-brain
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![Tom Rini](/assets/img/avatar_default.png)
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
200 lines
4.4 KiB
C
200 lines
4.4 KiB
C
// 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 <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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/*
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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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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_no_block(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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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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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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};
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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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