/* * This file is part of the libpayload project. * * Copyright (C) 2008 Advanced Micro Devices, Inc. * Copyright (C) 2008 Ulf Jordan <jordan@chalmers.se> * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <libpayload-config.h> #include <libpayload.h> #define IOBASE lib_sysinfo.serial->baseaddr #define MEMBASE (phys_to_virt(IOBASE)) static int serial_hardware_is_present = 0; static int serial_is_mem_mapped = 0; static uint8_t serial_read_reg(int offset) { offset *= lib_sysinfo.serial->regwidth; #if IS_ENABLED(CONFIG_LP_IO_ADDRESS_SPACE) if (!serial_is_mem_mapped) return inb(IOBASE + offset); else #endif return readb(MEMBASE + offset); } static void serial_write_reg(uint8_t val, int offset) { offset *= lib_sysinfo.serial->regwidth; #if IS_ENABLED(CONFIG_LP_IO_ADDRESS_SPACE) if (!serial_is_mem_mapped) outb(val, IOBASE + offset); else #endif writeb(val, MEMBASE + offset); } #if IS_ENABLED(CONFIG_LP_SERIAL_SET_SPEED) static void serial_hardware_init(int speed, int word_bits, int parity, int stop_bits) { unsigned char reg; #if !IS_ENABLED(CONFIG_LP_PL011_SERIAL_CONSOLE) /* Disable interrupts. */ serial_write_reg(0, 0x01); /* Assert RTS and DTR. */ serial_write_reg(3, 0x04); /* Set the divisor latch. */ reg = serial_read_reg(0x03); serial_write_reg(reg | 0x80, 0x03); /* Write the divisor. */ uint16_t divisor = 115200 / speed; serial_write_reg(divisor & 0xFF, 0x00); serial_write_reg(divisor >> 8, 0x01); /* Restore the previous value of the divisor. * And set 8 bits per character */ serial_write_reg((reg & ~0x80) | 3, 0x03); #endif } #endif static struct console_input_driver consin = { .havekey = &serial_havechar, .getchar = &serial_getchar }; static struct console_output_driver consout = { .putchar = &serial_putchar }; void serial_init(void) { if (!lib_sysinfo.serial) return; serial_is_mem_mapped = (lib_sysinfo.serial->type == CB_SERIAL_TYPE_MEMORY_MAPPED); if (!serial_is_mem_mapped) { #if IS_ENABLED(CONFIG_LP_IO_ADDRESS_SPACE) if ((inb(IOBASE + 0x05) == 0xFF) && (inb(IOBASE + 0x06) == 0xFF)) { printf("IO space mapped serial not present."); return; } #else printf("IO space mapped serial not supported."); return; #endif } #if IS_ENABLED(CONFIG_LP_SERIAL_SET_SPEED) serial_hardware_init(CONFIG_LP_SERIAL_BAUD_RATE, 8, 0, 1); #endif } void serial_console_init(void) { if (!lib_sysinfo.serial) return; serial_init(); console_add_input_driver(&consin); console_add_output_driver(&consout); serial_hardware_is_present = 1; } void serial_putchar(unsigned int c) { if (!serial_hardware_is_present) return; #if !IS_ENABLED(CONFIG_LP_PL011_SERIAL_CONSOLE) while ((serial_read_reg(0x05) & 0x20) == 0) ; #endif serial_write_reg(c, 0x00); if (c == '\n') serial_putchar('\r'); } int serial_havechar(void) { if (!serial_hardware_is_present) return 0; return serial_read_reg(0x05) & 0x01; } int serial_getchar(void) { if (!serial_hardware_is_present) return -1; while (!serial_havechar()) ; return serial_read_reg(0x00); } /* These are thinly veiled vt100 functions used by curses */ #define VT100_CLEAR "\e[H\e[J" /* These defines will fail if you use bold and reverse at the same time. * Switching off one of them will switch off both. tinycurses knows about * this and does the right thing. */ #define VT100_SBOLD "\e[1m" #define VT100_EBOLD "\e[m" #define VT100_SREVERSE "\e[7m" #define VT100_EREVERSE "\e[m" #define VT100_CURSOR_ADDR "\e[%d;%dH" #define VT100_CURSOR_ON "\e[?25l" #define VT100_CURSOR_OFF "\e[?25h" /* The following smacs/rmacs are actually for xterm; a real vt100 has enacs=\E(B\E)0, smacs=^N, rmacs=^O. */ #define VT100_SMACS "\e(0" #define VT100_RMACS "\e(B" /* A vt100 doesn't do color, setaf/setab below are from xterm-color. */ #define VT100_SET_COLOR "\e[3%d;4%dm" static void serial_putcmd(const char *str) { while (*str) serial_putchar(*(str++)); } void serial_clear(void) { serial_putcmd(VT100_CLEAR); } void serial_start_bold(void) { serial_putcmd(VT100_SBOLD); } void serial_end_bold(void) { serial_putcmd(VT100_EBOLD); } void serial_start_reverse(void) { serial_putcmd(VT100_SREVERSE); } void serial_end_reverse(void) { serial_putcmd(VT100_EREVERSE); } void serial_start_altcharset(void) { serial_putcmd(VT100_SMACS); } void serial_end_altcharset(void) { serial_putcmd(VT100_RMACS); } /** * Set the foreground and background colors on the serial console. * * @param fg Foreground color number. * @param bg Background color number. */ void serial_set_color(short fg, short bg) { char buffer[32]; snprintf(buffer, sizeof(buffer), VT100_SET_COLOR, fg, bg); serial_putcmd(buffer); } void serial_set_cursor(int y, int x) { char buffer[32]; snprintf(buffer, sizeof(buffer), VT100_CURSOR_ADDR, y + 1, x + 1); serial_putcmd(buffer); } void serial_cursor_enable(int state) { if (state) serial_putcmd(VT100_CURSOR_ON); else serial_putcmd(VT100_CURSOR_OFF); }