// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2008-2010 Thomas Chou <thomas@wytron.com.tw> */ #include <linux/io.h> #if (defined(CONFIG_SERIAL_ALTERA_JTAGUART_CONSOLE) && defined(JTAG_UART_BASE))\ || (defined(CONFIG_SERIAL_ALTERA_UART_CONSOLE) && defined(UART0_BASE)) static void *my_ioremap(unsigned long physaddr) { return (void *)(physaddr | CONFIG_NIOS2_IO_REGION_BASE); } #endif #if defined(CONFIG_SERIAL_ALTERA_JTAGUART_CONSOLE) && defined(JTAG_UART_BASE) #define ALTERA_JTAGUART_SIZE 8 #define ALTERA_JTAGUART_DATA_REG 0 #define ALTERA_JTAGUART_CONTROL_REG 4 #define ALTERA_JTAGUART_CONTROL_AC_MSK (0x00000400) #define ALTERA_JTAGUART_CONTROL_WSPACE_MSK (0xFFFF0000) static void *uartbase; #if defined(CONFIG_SERIAL_ALTERA_JTAGUART_CONSOLE_BYPASS) static void jtag_putc(int ch) { if (readl(uartbase + ALTERA_JTAGUART_CONTROL_REG) & ALTERA_JTAGUART_CONTROL_WSPACE_MSK) writeb(ch, uartbase + ALTERA_JTAGUART_DATA_REG); } #else static void jtag_putc(int ch) { while ((readl(uartbase + ALTERA_JTAGUART_CONTROL_REG) & ALTERA_JTAGUART_CONTROL_WSPACE_MSK) == 0) ; writeb(ch, uartbase + ALTERA_JTAGUART_DATA_REG); } #endif static int putchar(int ch) { jtag_putc(ch); return ch; } static void console_init(void) { uartbase = my_ioremap((unsigned long) JTAG_UART_BASE); writel(ALTERA_JTAGUART_CONTROL_AC_MSK, uartbase + ALTERA_JTAGUART_CONTROL_REG); } #elif defined(CONFIG_SERIAL_ALTERA_UART_CONSOLE) && defined(UART0_BASE) #define ALTERA_UART_SIZE 32 #define ALTERA_UART_TXDATA_REG 4 #define ALTERA_UART_STATUS_REG 8 #define ALTERA_UART_DIVISOR_REG 16 #define ALTERA_UART_STATUS_TRDY_MSK (0x40) static unsigned uartbase; static void uart_putc(int ch) { int i; for (i = 0; (i < 0x10000); i++) { if (readw(uartbase + ALTERA_UART_STATUS_REG) & ALTERA_UART_STATUS_TRDY_MSK) break; } writeb(ch, uartbase + ALTERA_UART_TXDATA_REG); } static int putchar(int ch) { uart_putc(ch); if (ch == '\n') uart_putc('\r'); return ch; } static void console_init(void) { unsigned int baud, baudclk; uartbase = (unsigned long) my_ioremap((unsigned long) UART0_BASE); baud = CONFIG_SERIAL_ALTERA_UART_BAUDRATE; baudclk = UART0_FREQ / baud; writew(baudclk, uartbase + ALTERA_UART_DIVISOR_REG); } #else static int putchar(int ch) { return ch; } static void console_init(void) { } #endif static int puts(const char *s) { while (*s) putchar(*s++); return 0; }