9ed8a82d26
You might want to use the serial hardware for something other than a console, or you might want to intercede in the serial stream to wrap it in another protocol. This is what you'd do to send output to GDB while using it to debug the payload. Change-Id: I2218c0dbb988dacb64e5bdaf5d92138828eff8b6 Signed-off-by: Gabe Black <gabeblack@google.com> Reviewed-on: https://chromium-review.googlesource.com/179559 Reviewed-by: Ronald Minnich <rminnich@chromium.org> Reviewed-by: David Hendricks <dhendrix@chromium.org> Commit-Queue: Gabe Black <gabeblack@chromium.org> Tested-by: Gabe Black <gabeblack@chromium.org> (cherry picked from commit da9ab46d974745125fe7d8b29ce43336c3586cd5) Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com> Reviewed-on: http://review.coreboot.org/6547 Tested-by: build bot (Jenkins)
245 lines
6 KiB
C
245 lines
6 KiB
C
/*
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* This file is part of the libpayload project.
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*
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* Copyright (C) 2008 Advanced Micro Devices, Inc.
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* Copyright (C) 2008 Ulf Jordan <jordan@chalmers.se>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <libpayload-config.h>
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#include <libpayload.h>
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#define IOBASE lib_sysinfo.serial->baseaddr
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#define MEMBASE (phys_to_virt(IOBASE))
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static int serial_hardware_is_present = 0;
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static int serial_is_mem_mapped = 0;
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static uint8_t serial_read_reg(int offset)
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{
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#ifdef CONFIG_LP_IO_ADDRESS_SPACE
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if (!serial_is_mem_mapped)
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return inb(IOBASE + offset);
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else
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#endif
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return readb(MEMBASE + offset);
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}
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static void serial_write_reg(uint8_t val, int offset)
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{
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#ifdef CONFIG_LP_IO_ADDRESS_SPACE
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if (!serial_is_mem_mapped)
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outb(val, IOBASE + offset);
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else
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#endif
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writeb(val, MEMBASE + offset);
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}
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#ifdef CONFIG_LP_SERIAL_SET_SPEED
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static void serial_hardware_init(int speed, int word_bits,
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int parity, int stop_bits)
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{
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unsigned char reg;
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/* Disable interrupts. */
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serial_write_reg(0, 0x01);
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/* Assert RTS and DTR. */
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serial_write_reg(3, 0x04);
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/* Set the divisor latch. */
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reg = serial_read_reg(0x03);
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serial_write_reg(reg | 0x80, 0x03);
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/* Write the divisor. */
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uint16_t divisor = 115200 / speed;
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serial_write_reg(divisor & 0xFF, 0x00);
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serial_write_reg(divisor >> 8, 0x01);
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/* Restore the previous value of the divisor.
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* And set 8 bits per character */
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serial_write_reg((reg & ~0x80) | 3, 0x03);
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}
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#endif
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static struct console_input_driver consin = {
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.havekey = &serial_havechar,
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.getchar = &serial_getchar
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};
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static struct console_output_driver consout = {
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.putchar = &serial_putchar
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};
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void serial_init(void)
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{
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if (!lib_sysinfo.serial)
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return;
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serial_is_mem_mapped =
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(lib_sysinfo.serial->type == CB_SERIAL_TYPE_MEMORY_MAPPED);
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if (!serial_is_mem_mapped) {
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#ifdef CONFIG_LP_IO_ADDRESS_SPACE
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if ((inb(IOBASE + 0x05) == 0xFF) &&
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(inb(IOBASE + 0x06) == 0xFF)) {
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printf("IO space mapped serial not present.");
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return;
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}
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#else
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printf("IO space mapped serial not supported.");
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return;
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#endif
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}
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#ifdef CONFIG_LP_SERIAL_SET_SPEED
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serial_hardware_init(CONFIG_LP_SERIAL_BAUD_RATE, 8, 0, 1);
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#endif
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}
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void serial_console_init(void)
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{
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if (!lib_sysinfo.serial)
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return;
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serial_init();
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console_add_input_driver(&consin);
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console_add_output_driver(&consout);
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serial_hardware_is_present = 1;
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}
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void serial_putchar(unsigned int c)
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{
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if (!serial_hardware_is_present)
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return;
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while ((serial_read_reg(0x05) & 0x20) == 0) ;
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serial_write_reg(c, 0x00);
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}
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int serial_havechar(void)
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{
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if (!serial_hardware_is_present)
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return 0;
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return serial_read_reg(0x05) & 0x01;
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}
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int serial_getchar(void)
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{
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if (!serial_hardware_is_present)
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return -1;
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while (!serial_havechar()) ;
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return serial_read_reg(0x00);
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}
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/* These are thinly veiled vt100 functions used by curses */
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#define VT100_CLEAR "\e[H\e[J"
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/* These defines will fail if you use bold and reverse at the same time.
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* Switching off one of them will switch off both. tinycurses knows about
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* this and does the right thing.
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*/
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#define VT100_SBOLD "\e[1m"
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#define VT100_EBOLD "\e[m"
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#define VT100_SREVERSE "\e[7m"
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#define VT100_EREVERSE "\e[m"
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#define VT100_CURSOR_ADDR "\e[%d;%dH"
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#define VT100_CURSOR_ON "\e[?25l"
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#define VT100_CURSOR_OFF "\e[?25h"
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/* The following smacs/rmacs are actually for xterm; a real vt100 has
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enacs=\E(B\E)0, smacs=^N, rmacs=^O. */
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#define VT100_SMACS "\e(0"
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#define VT100_RMACS "\e(B"
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/* A vt100 doesn't do color, setaf/setab below are from xterm-color. */
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#define VT100_SET_COLOR "\e[3%d;4%dm"
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static void serial_putcmd(const char *str)
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{
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while (*str)
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serial_putchar(*(str++));
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}
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void serial_clear(void)
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{
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serial_putcmd(VT100_CLEAR);
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}
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void serial_start_bold(void)
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{
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serial_putcmd(VT100_SBOLD);
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}
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void serial_end_bold(void)
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{
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serial_putcmd(VT100_EBOLD);
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}
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void serial_start_reverse(void)
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{
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serial_putcmd(VT100_SREVERSE);
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}
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void serial_end_reverse(void)
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{
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serial_putcmd(VT100_EREVERSE);
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}
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void serial_start_altcharset(void)
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{
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serial_putcmd(VT100_SMACS);
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}
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void serial_end_altcharset(void)
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{
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serial_putcmd(VT100_RMACS);
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}
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/**
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* Set the foreground and background colors on the serial console.
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*
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* @param fg Foreground color number.
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* @param bg Background color number.
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*/
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void serial_set_color(short fg, short bg)
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{
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char buffer[32];
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snprintf(buffer, sizeof(buffer), VT100_SET_COLOR, fg, bg);
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serial_putcmd(buffer);
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}
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void serial_set_cursor(int y, int x)
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{
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char buffer[32];
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snprintf(buffer, sizeof(buffer), VT100_CURSOR_ADDR, y + 1, x + 1);
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serial_putcmd(buffer);
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}
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void serial_cursor_enable(int state)
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{
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if (state)
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serial_putcmd(VT100_CURSOR_ON);
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else
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serial_putcmd(VT100_CURSOR_OFF);
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}
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