| /* |
| * (C) Copyright 2006 |
| * Mindspeed Technologies, Inc. <www.mindspeed.com> |
| * |
| * 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 <common.h> |
| #include <asm/arch/bsp.h> |
| #include <asm/hardware.h> |
| |
| #if defined(CONFIG_UART0) |
| |
| DECLARE_GLOBAL_DATA_PTR; |
| |
| #define MCR_RXD_ENABLE 0x80 |
| #define MCR_TXD_ENABLE 0x40 |
| #define MCR_TIMER_SOURCE 0x20 |
| |
| #define LCR_WLEN8 0x03 /* Wordlength: 8 bits */ |
| |
| #define SSR_DR 0x01 /* Receiver data ready */ |
| #define SSR_THRE 0x20 /* Transmit-hold-register empty */ |
| |
| #define FCR_TIMER_DIV_BYPASS 0x04 |
| |
| void serial_setbrg (void) |
| { |
| int baudrate; |
| unsigned int reg; |
| unsigned int clk = SoC_clk_amba_get(); |
| |
| if ((baudrate = gd->baudrate) <= 0) |
| baudrate = CONFIG_BAUDRATE; |
| |
| reg = clk / (baudrate * 16); |
| |
| (*(volatile u8 *)UART_RXD) = 0x0F; |
| (*(volatile u8 *)UART_TXD) = 0x0F; |
| |
| SoC_timer1_set(reg); |
| } |
| |
| int serial_init (void) |
| { |
| serial_setbrg (); |
| |
| (*(volatile u8 *)UART_FCR) = FCR_TIMER_DIV_BYPASS; |
| (*(volatile u8 *)UART_MCR) = MCR_RXD_ENABLE | MCR_TXD_ENABLE | MCR_TIMER_SOURCE; |
| (*(volatile u8 *)UART_LCR) = LCR_WLEN8; |
| (*(volatile u8 *)UART_IER) = 0x00; |
| |
| return (0); |
| } |
| |
| void serial_putc (const char c) |
| { |
| /* wait for transmitter to empty */ |
| while (!((*(volatile u8 *)UART_SSR) & SSR_THRE)) ; |
| |
| (*(volatile u8 *)UART_THR) = c; |
| |
| if (c == '\n') |
| serial_putc ('\r'); |
| } |
| |
| void serial_puts (const char *s) |
| { |
| while (*s) { |
| serial_putc (*s++); |
| } |
| } |
| |
| int serial_getc (void) |
| { |
| while (!((*(volatile u8 *)UART_SSR) & SSR_DR)) ; |
| |
| return ((*(volatile u8 *)UART_RBR) & 0xff); |
| } |
| |
| int serial_tstc (void) |
| { |
| return ((*(volatile u8 *)UART_SSR) & SSR_DR); |
| } |
| |
| #endif |
