diff options
Diffstat (limited to 'package/uboot-ifxmips/files/cpu/mips/danube/au1x00_serial.c')
| -rw-r--r-- | package/uboot-ifxmips/files/cpu/mips/danube/au1x00_serial.c | 135 |
1 files changed, 0 insertions, 135 deletions
diff --git a/package/uboot-ifxmips/files/cpu/mips/danube/au1x00_serial.c b/package/uboot-ifxmips/files/cpu/mips/danube/au1x00_serial.c deleted file mode 100644 index 42c668ee3d..0000000000 --- a/package/uboot-ifxmips/files/cpu/mips/danube/au1x00_serial.c +++ /dev/null @@ -1,135 +0,0 @@ -/* - * AU1X00 UART support - * - * Hardcoded to UART 0 for now - * Speed and options also hardcoded to 115200 8N1 - * - * Copyright (c) 2003 Thomas.Lange@corelatus.se - * - * See file CREDITS for list of people who contributed to this - * project. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - */ - -#include <config.h> - -#ifdef CONFIG_AU1X00 - -#include <common.h> -#include <asm/au1x00.h> - -/****************************************************************************** -* -* serial_init - initialize a channel -* -* This routine initializes the number of data bits, parity -* and set the selected baud rate. Interrupts are disabled. -* Set the modem control signals if the option is selected. -* -* RETURNS: N/A -*/ - -int serial_init (void) -{ - volatile u32 *uart_fifoctl = (volatile u32*)(UART0_ADDR+UART_FCR); - volatile u32 *uart_enable = (volatile u32*)(UART0_ADDR+UART_ENABLE); - - /* Enable clocks first */ - *uart_enable = UART_EN_CE; - - /* Then release reset */ - /* Must release reset before setting other regs */ - *uart_enable = UART_EN_CE|UART_EN_E; - - /* Activate fifos, reset tx and rx */ - /* Set tx trigger level to 12 */ - *uart_fifoctl = UART_FCR_ENABLE_FIFO|UART_FCR_CLEAR_RCVR| - UART_FCR_CLEAR_XMIT|UART_FCR_T_TRIGGER_12; - - serial_setbrg(); - - return 0; -} - - -void serial_setbrg (void) -{ - volatile u32 *uart_clk = (volatile u32*)(UART0_ADDR+UART_CLK); - volatile u32 *uart_lcr = (volatile u32*)(UART0_ADDR+UART_LCR); - volatile u32 *sys_powerctrl = (u32 *)SYS_POWERCTRL; - int sd; - int divisorx2; - - /* sd is system clock divisor */ - /* see section 10.4.5 in au1550 datasheet */ - sd = (*sys_powerctrl & 0x03) + 2; - - /* calulate 2x baudrate and round */ - divisorx2 = ((CFG_HZ/(sd * 16 * CONFIG_BAUDRATE))); - - if (divisorx2 & 0x01) - divisorx2 = divisorx2 + 1; - - *uart_clk = divisorx2 / 2; - - /* Set parity, stop bits and word length to 8N1 */ - *uart_lcr = UART_LCR_WLEN8; -} - -void serial_putc (const char c) -{ - volatile u32 *uart_lsr = (volatile u32*)(UART0_ADDR+UART_LSR); - volatile u32 *uart_tx = (volatile u32*)(UART0_ADDR+UART_TX); - - if (c == '\n') serial_putc ('\r'); - - /* Wait for fifo to shift out some bytes */ - while((*uart_lsr&UART_LSR_THRE)==0); - - *uart_tx = (u32)c; -} - -void serial_puts (const char *s) -{ - while (*s) - { - serial_putc (*s++); - } -} - -int serial_getc (void) -{ - volatile u32 *uart_rx = (volatile u32*)(UART0_ADDR+UART_RX); - char c; - - while (!serial_tstc()); - - c = (*uart_rx&0xFF); - return c; -} - -int serial_tstc (void) -{ - volatile u32 *uart_lsr = (volatile u32*)(UART0_ADDR+UART_LSR); - - if(*uart_lsr&UART_LSR_DR){ - /* Data in rfifo */ - return(1); - } - return 0; -} -#endif /* CONFIG_SERIAL_AU1X00 */ |