| Ley Foon Tan | 0162362 | 2015-02-10 23:26:34 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2008-2010 Thomas Chou <thomas@wytron.com.tw> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License as published by |
| 6 | * the Free Software Foundation; either version 2 of the License, or |
| 7 | * (at your option) any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 16 | * |
| 17 | */ |
| 18 | |
| 19 | #include <linux/io.h> |
| 20 | |
| 21 | #if (defined(CONFIG_SERIAL_ALTERA_JTAGUART_CONSOLE) && defined(JTAG_UART_BASE))\ |
| 22 | || (defined(CONFIG_SERIAL_ALTERA_UART_CONSOLE) && defined(UART0_BASE)) |
| 23 | static void *my_ioremap(unsigned long physaddr) |
| 24 | { |
| 25 | return (void *)(physaddr | CONFIG_NIOS2_IO_REGION_BASE); |
| 26 | } |
| 27 | #endif |
| 28 | |
| 29 | #if defined(CONFIG_SERIAL_ALTERA_JTAGUART_CONSOLE) && defined(JTAG_UART_BASE) |
| 30 | |
| 31 | #define ALTERA_JTAGUART_SIZE 8 |
| 32 | #define ALTERA_JTAGUART_DATA_REG 0 |
| 33 | #define ALTERA_JTAGUART_CONTROL_REG 4 |
| 34 | #define ALTERA_JTAGUART_CONTROL_AC_MSK (0x00000400) |
| 35 | #define ALTERA_JTAGUART_CONTROL_WSPACE_MSK (0xFFFF0000) |
| 36 | static void *uartbase; |
| 37 | |
| 38 | #if defined(CONFIG_SERIAL_ALTERA_JTAGUART_CONSOLE_BYPASS) |
| 39 | static void jtag_putc(int ch) |
| 40 | { |
| 41 | if (readl(uartbase + ALTERA_JTAGUART_CONTROL_REG) & |
| 42 | ALTERA_JTAGUART_CONTROL_WSPACE_MSK) |
| 43 | writeb(ch, uartbase + ALTERA_JTAGUART_DATA_REG); |
| 44 | } |
| 45 | #else |
| 46 | static void jtag_putc(int ch) |
| 47 | { |
| 48 | while ((readl(uartbase + ALTERA_JTAGUART_CONTROL_REG) & |
| 49 | ALTERA_JTAGUART_CONTROL_WSPACE_MSK) == 0) |
| 50 | ; |
| 51 | writeb(ch, uartbase + ALTERA_JTAGUART_DATA_REG); |
| 52 | } |
| 53 | #endif |
| 54 | |
| 55 | static int putchar(int ch) |
| 56 | { |
| 57 | jtag_putc(ch); |
| 58 | return ch; |
| 59 | } |
| 60 | |
| 61 | static void console_init(void) |
| 62 | { |
| 63 | uartbase = my_ioremap((unsigned long) JTAG_UART_BASE); |
| 64 | writel(ALTERA_JTAGUART_CONTROL_AC_MSK, |
| 65 | uartbase + ALTERA_JTAGUART_CONTROL_REG); |
| 66 | } |
| 67 | |
| 68 | #elif defined(CONFIG_SERIAL_ALTERA_UART_CONSOLE) && defined(UART0_BASE) |
| 69 | |
| 70 | #define ALTERA_UART_SIZE 32 |
| 71 | #define ALTERA_UART_TXDATA_REG 4 |
| 72 | #define ALTERA_UART_STATUS_REG 8 |
| 73 | #define ALTERA_UART_DIVISOR_REG 16 |
| 74 | #define ALTERA_UART_STATUS_TRDY_MSK (0x40) |
| 75 | static unsigned uartbase; |
| 76 | |
| 77 | static void uart_putc(int ch) |
| 78 | { |
| 79 | int i; |
| 80 | |
| 81 | for (i = 0; (i < 0x10000); i++) { |
| 82 | if (readw(uartbase + ALTERA_UART_STATUS_REG) & |
| 83 | ALTERA_UART_STATUS_TRDY_MSK) |
| 84 | break; |
| 85 | } |
| 86 | writeb(ch, uartbase + ALTERA_UART_TXDATA_REG); |
| 87 | } |
| 88 | |
| 89 | static int putchar(int ch) |
| 90 | { |
| 91 | uart_putc(ch); |
| 92 | if (ch == '\n') |
| 93 | uart_putc('\r'); |
| 94 | return ch; |
| 95 | } |
| 96 | |
| 97 | static void console_init(void) |
| 98 | { |
| 99 | unsigned int baud, baudclk; |
| 100 | |
| 101 | uartbase = (unsigned long) my_ioremap((unsigned long) UART0_BASE); |
| 102 | baud = CONFIG_SERIAL_ALTERA_UART_BAUDRATE; |
| 103 | baudclk = UART0_FREQ / baud; |
| 104 | writew(baudclk, uartbase + ALTERA_UART_DIVISOR_REG); |
| 105 | } |
| 106 | |
| 107 | #else |
| 108 | |
| 109 | static int putchar(int ch) |
| 110 | { |
| 111 | return ch; |
| 112 | } |
| 113 | |
| 114 | static void console_init(void) |
| 115 | { |
| 116 | } |
| 117 | |
| 118 | #endif |
| 119 | |
| 120 | static int puts(const char *s) |
| 121 | { |
| 122 | while (*s) |
| 123 | putchar(*s++); |
| 124 | return 0; |
| 125 | } |