diff options
Diffstat (limited to 'package/uboot-xburst/files/cpu/mips/jz_serial.c')
| -rw-r--r-- | package/uboot-xburst/files/cpu/mips/jz_serial.c | 141 |
1 files changed, 0 insertions, 141 deletions
diff --git a/package/uboot-xburst/files/cpu/mips/jz_serial.c b/package/uboot-xburst/files/cpu/mips/jz_serial.c deleted file mode 100644 index e9a18a105b..0000000000 --- a/package/uboot-xburst/files/cpu/mips/jz_serial.c +++ /dev/null @@ -1,141 +0,0 @@ -/* - * Jz47xx UART support - * - * Hardcoded to UART 0 for now - * Options also hardcoded to 8N1 - * - * Copyright (c) 2005 - * Ingenic Semiconductor, <jlwei@ingenic.cn> - * - * 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> - -#if defined(CONFIG_JZ4740) - -#include <common.h> - -#include <asm/jz4740.h> - -#undef UART_BASE -#ifndef CONFIG_SYS_UART_BASE -#define UART_BASE UART0_BASE -#else -#define UART_BASE CONFIG_SYS_UART_BASE -#endif - -/****************************************************************************** -* -* 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) -{ -#if !defined(CONFIG_NAND_U_BOOT) || defined(CONFIG_NAND_SPL) - volatile u8 *uart_fcr = (volatile u8 *)(UART_BASE + OFF_FCR); - volatile u8 *uart_lcr = (volatile u8 *)(UART_BASE + OFF_LCR); - volatile u8 *uart_ier = (volatile u8 *)(UART_BASE + OFF_IER); - volatile u8 *uart_sircr = (volatile u8 *)(UART_BASE + OFF_SIRCR); - - /* Disable port interrupts while changing hardware */ - *uart_ier = 0; - - /* Disable UART unit function */ - *uart_fcr = ~UART_FCR_UUE; - - /* Set both receiver and transmitter in UART mode (not SIR) */ - *uart_sircr = ~(SIRCR_RSIRE | SIRCR_TSIRE); - - /* Set databits, stopbits and parity. (8-bit data, 1 stopbit, no parity) */ - *uart_lcr = UART_LCR_WLEN_8 | UART_LCR_STOP_1; - - /* Set baud rate */ - serial_setbrg(); - - /* Enable UART unit, enable and clear FIFO */ - *uart_fcr = UART_FCR_UUE | UART_FCR_FE | UART_FCR_TFLS | UART_FCR_RFLS; -#endif - return 0; -} - -void serial_setbrg (void) -{ - volatile u8 *uart_lcr = (volatile u8 *)(UART_BASE + OFF_LCR); - volatile u8 *uart_dlhr = (volatile u8 *)(UART_BASE + OFF_DLHR); - volatile u8 *uart_dllr = (volatile u8 *)(UART_BASE + OFF_DLLR); - u32 baud_div, tmp; - - baud_div = CONFIG_SYS_EXTAL / 16 / CONFIG_BAUDRATE; - - tmp = *uart_lcr; - tmp |= UART_LCR_DLAB; - *uart_lcr = tmp; - - *uart_dlhr = (baud_div >> 8) & 0xff; - *uart_dllr = baud_div & 0xff; - - tmp &= ~UART_LCR_DLAB; - *uart_lcr = tmp; -} - -void serial_putc (const char c) -{ - volatile u8 *uart_lsr = (volatile u8 *)(UART_BASE + OFF_LSR); - volatile u8 *uart_tdr = (volatile u8 *)(UART_BASE + OFF_TDR); - - if (c == '\n') serial_putc ('\r'); - - /* Wait for fifo to shift out some bytes */ - while ( !((*uart_lsr & (UART_LSR_TDRQ | UART_LSR_TEMT)) == 0x60) ); - - *uart_tdr = (u8)c; -} - -void serial_puts (const char *s) -{ - while (*s) { - serial_putc (*s++); - } -} - -int serial_getc (void) -{ - volatile u8 *uart_rdr = (volatile u8 *)(UART_BASE + OFF_RDR); - - while (!serial_tstc()); - - return *uart_rdr; -} - -int serial_tstc (void) -{ - volatile u8 *uart_lsr = (volatile u8 *)(UART_BASE + OFF_LSR); - - if (*uart_lsr & UART_LSR_DR) { - /* Data in rfifo */ - return (1); - } - return 0; -} - -#endif |