diff options
Diffstat (limited to 'cpu/leon2/serial.c')
| -rw-r--r-- | cpu/leon2/serial.c | 165 |
1 files changed, 0 insertions, 165 deletions
diff --git a/cpu/leon2/serial.c b/cpu/leon2/serial.c deleted file mode 100644 index 4f41b8e..0000000 --- a/cpu/leon2/serial.c +++ /dev/null @@ -1,165 +0,0 @@ -/* GRLIB APBUART Serial controller driver - * - * (C) Copyright 2008 - * Daniel Hellstrom, Gaisler Research, daniel@gaisler.com. - * - * 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 <common.h> -#include <asm/processor.h> -#include <asm/leon.h> - -DECLARE_GLOBAL_DATA_PTR; - -/* Force cache miss each time a serial controller reg is read */ -#define CACHE_BYPASS 1 - -#ifdef CACHE_BYPASS -#define READ_BYTE(var) SPARC_NOCACHE_READ_BYTE((unsigned int)&(var)) -#define READ_HWORD(var) SPARC_NOCACHE_READ_HWORD((unsigned int)&(var)) -#define READ_WORD(var) SPARC_NOCACHE_READ((unsigned int)&(var)) -#define READ_DWORD(var) SPARC_NOCACHE_READ_DWORD((unsigned int)&(var)) -#endif - -int serial_init(void) -{ - LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS; - LEON2_Uart_regs *regs; - unsigned int tmp; - - /* Init LEON2 UART - * - * Set scaler / baud rate - * - * Receiver & transmitter enable - */ -#if LEON2_CONSOLE_SELECT == LEON_CONSOLE_UART1 - regs = (LEON2_Uart_regs *) & leon2->UART_Channel_1; -#else - regs = (LEON2_Uart_regs *) & leon2->UART_Channel_2; -#endif - - regs->UART_Scaler = CONFIG_SYS_LEON2_UART1_SCALER; - - /* Let bit 11 be unchanged (debug bit for GRMON) */ - tmp = READ_WORD(regs->UART_Control); - - regs->UART_Control = ((tmp & LEON2_UART_CTRL_DBG) | - (LEON2_UART1_LOOPBACK_ENABLE << 7) | - (LEON2_UART1_FLOWCTRL_ENABLE << 6) | - (LEON2_UART1_PARITY_ENABLE << 5) | - (LEON2_UART1_ODDPAR_ENABLE << 4) | - LEON2_UART_CTRL_RE | LEON2_UART_CTRL_TE); - - return 0; -} - -void serial_putc(const char c) -{ - if (c == '\n') - serial_putc_raw('\r'); - - serial_putc_raw(c); -} - -void serial_putc_raw(const char c) -{ - LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS; - LEON2_Uart_regs *regs; - -#if LEON2_CONSOLE_SELECT == LEON_CONSOLE_UART1 - regs = (LEON2_Uart_regs *) & leon2->UART_Channel_1; -#else - regs = (LEON2_Uart_regs *) & leon2->UART_Channel_2; -#endif - - /* Wait for last character to go. */ - while (!(READ_WORD(regs->UART_Status) & LEON2_UART_STAT_THE)) ; - - /* Send data */ - regs->UART_Channel = c; - -#ifdef LEON_DEBUG - /* Wait for data to be sent */ - while (!(READ_WORD(regs->UART_Status) & LEON2_UART_STAT_TSE)) ; -#endif -} - -void serial_puts(const char *s) -{ - while (*s) { - serial_putc(*s++); - } -} - -int serial_getc(void) -{ - LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS; - LEON2_Uart_regs *regs; - -#if LEON2_CONSOLE_SELECT == LEON_CONSOLE_UART1 - regs = (LEON2_Uart_regs *) & leon2->UART_Channel_1; -#else - regs = (LEON2_Uart_regs *) & leon2->UART_Channel_2; -#endif - - /* Wait for a character to arrive. */ - while (!(READ_WORD(regs->UART_Status) & LEON2_UART_STAT_DR)) ; - - /* read data */ - return READ_WORD(regs->UART_Channel); -} - -int serial_tstc(void) -{ - LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS; - LEON2_Uart_regs *regs; - -#if LEON2_CONSOLE_SELECT == LEON_CONSOLE_UART1 - regs = (LEON2_Uart_regs *) & leon2->UART_Channel_1; -#else - regs = (LEON2_Uart_regs *) & leon2->UART_Channel_2; -#endif - - return (READ_WORD(regs->UART_Status) & LEON2_UART_STAT_DR); -} - -/* set baud rate for uart */ -void serial_setbrg(void) -{ - /* update baud rate settings, read it from gd->baudrate */ - unsigned int scaler; - LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS; - LEON2_Uart_regs *regs; - -#if LEON2_CONSOLE_SELECT == LEON_CONSOLE_UART1 - regs = (LEON2_Uart_regs *) & leon2->UART_Channel_1; -#else - regs = (LEON2_Uart_regs *) & leon2->UART_Channel_2; -#endif - - if (gd->baudrate > 0) { - scaler = - (((CONFIG_SYS_CLK_FREQ * 10) / (gd->baudrate * 8)) - - 5) / 10; - regs->UART_Scaler = scaler; - } -} |