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Diffstat (limited to 'cpu/bf537/serial.c')
| -rw-r--r-- | cpu/bf537/serial.c | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/cpu/bf537/serial.c b/cpu/bf537/serial.c deleted file mode 100644 index 3c6a370..0000000 --- a/cpu/bf537/serial.c +++ /dev/null @@ -1,186 +0,0 @@ -/* - * U-boot - serial.c Serial driver for BF537 - * - * Copyright (c) 2005-2007 Analog Devices Inc. - * - * This file is based on - * bf537_serial.c: Serial driver for BlackFin BF537 internal UART. - * Copyright (c) 2003 Bas Vermeulen <bas@buyways.nl>, - * BuyWays B.V. (www.buyways.nl) - * - * Based heavily on blkfinserial.c - * blkfinserial.c: Serial driver for BlackFin DSP internal USRTs. - * Copyright(c) 2003 Metrowerks <mwaddel@metrowerks.com> - * Copyright(c) 2001 Tony Z. Kou <tonyko@arcturusnetworks.com> - * Copyright(c) 2001-2002 Arcturus Networks Inc. <www.arcturusnetworks.com> - * - * Based on code from 68328 version serial driver imlpementation which was: - * Copyright (C) 1995 David S. Miller <davem@caip.rutgers.edu> - * Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com> - * Copyright (C) 1998, 1999 D. Jeff Dionne <jeff@uclinux.org> - * Copyright (C) 1999 Vladimir Gurevich <vgurevic@cisco.com> - * - * (C) Copyright 2000-2004 - * Wolfgang Denk, DENX Software Engineering, wd@denx.de. - * - * 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., 51 Franklin St, Fifth Floor, Boston, - * MA 02110-1301 USA - */ - -#include <common.h> -#include <asm/system.h> -#include <asm/bitops.h> -#include <asm/delay.h> -#include <asm/io.h> -#include "serial.h" -#include <asm/mach-common/bits/uart.h> - -DECLARE_GLOBAL_DATA_PTR; - -unsigned long pll_div_fact; - -void calc_baud(void) -{ - unsigned char i; - int temp; - u_long sclk = get_sclk(); - - for (i = 0; i < sizeof(baud_table) / sizeof(int); i++) { - temp = sclk / (baud_table[i] * 8); - if ((temp & 0x1) == 1) { - temp++; - } - temp = temp / 2; - hw_baud_table[i].dl_high = (temp >> 8) & 0xFF; - hw_baud_table[i].dl_low = (temp) & 0xFF; - } -} - -void serial_setbrg(void) -{ - int i; - - calc_baud(); - - for (i = 0; i < sizeof(baud_table) / sizeof(int); i++) { - if (gd->baudrate == baud_table[i]) - break; - } - - /* Enable UART */ - *pUART0_GCTL |= UCEN; - SSYNC(); - - /* Set DLAB in LCR to Access DLL and DLH */ - ACCESS_LATCH; - SSYNC(); - - *pUART0_DLL = hw_baud_table[i].dl_low; - SSYNC(); - *pUART0_DLH = hw_baud_table[i].dl_high; - SSYNC(); - - /* Clear DLAB in LCR to Access THR RBR IER */ - ACCESS_PORT_IER; - SSYNC(); - - /* Enable ERBFI and ELSI interrupts - * to poll SIC_ISR register*/ - *pUART0_IER = ELSI | ERBFI | ETBEI; - SSYNC(); - - /* Set LCR to Word Lengh 8-bit word select */ - *pUART0_LCR = WLS_8; - SSYNC(); - - return; -} - -int serial_init(void) -{ - serial_setbrg(); - return (0); -} - -void serial_putc(const char c) -{ - if ((*pUART0_LSR) & TEMT) { - if (c == '\n') - serial_putc('\r'); - - local_put_char(c); - } - - while (!((*pUART0_LSR) & TEMT)) - SYNC_ALL; - - return; -} - -int serial_tstc(void) -{ - if (*pUART0_LSR & DR) - return 1; - else - return 0; -} - -int serial_getc(void) -{ - unsigned short uart_lsr_val, uart_rbr_val; - unsigned long isr_val; - int ret; - - /* Poll for RX Interrupt */ - while (!serial_tstc()) - continue; - asm("csync;"); - - uart_lsr_val = *pUART0_LSR; /* Clear status bit */ - uart_rbr_val = *pUART0_RBR; /* getc() */ - - if (uart_lsr_val & (OE|PE|FE|BI)) { - ret = -1; - } else { - ret = uart_rbr_val & 0xff; - } - - return ret; -} - -void serial_puts(const char *s) -{ - while (*s) { - serial_putc(*s++); - } -} - -static void local_put_char(char ch) -{ - int flags = 0; - unsigned long isr_val; - - /* Poll for TX Interruput */ - while (!(*pUART0_LSR & THRE)) - continue; - asm("csync;"); - - *pUART0_THR = ch; /* putc() */ - - return; -} |