LXR uboot/board/logicpd/zoom2/zoom2

   1/*
   2 * Copyright (c) 2009 Wind River Systems, Inc.
   3 * Tom Rix <Tom.Rix@windriver.com>
   4 *
   5 * This program is free software; you can redistribute it and/or
   6 * modify it under the terms of the GNU General Public License as
   7 * published by the Free Software Foundation; either version 2 of
   8 * the License, or (at your option) any later version.
   9 *
  10 * This program is distributed in the hope that it will be useful,
  11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 * GNU General Public License for more details.
  14 *
  15 * You should have received a copy of the GNU General Public License
  16 * along with this program; if not, write to the Free Software
  17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  18 * MA 02111-1307 USA
  19 *
  20 * This file was adapted from arch/powerpc/cpu/mpc5xxx/serial.c
  21 *
  22 */
  23
  24#include <common.h>
  25#include <serial.h>
  26#include <ns16550.h>
  27#include <asm/arch/cpu.h>
  28#include "zoom2_serial.h"
  29
  30int quad_init_dev (unsigned long base)
  31{
  32        /*
  33         * The Quad UART is on the debug board.
  34         * Check if the debug board is attached before using the UART
  35         */
  36        if (zoom2_debug_board_connected ()) {
  37                NS16550_t com_port = (NS16550_t) base;
  38                int baud_divisor = CONFIG_SYS_NS16550_CLK / 16 /
  39                        CONFIG_BAUDRATE;
  40
  41                /*
  42                 * Zoom2 has a board specific initialization of its UART.
  43                 * This generic initialization has been copied from
  44                 * drivers/serial/ns16550.c. The macros have been expanded.
  45                 *
  46                 * Do the following instead of
  47                 *
  48                 * NS16550_init (com_port, clock_divisor);
  49                 */
  50                com_port->ier = 0x00;
  51
  52                /*
  53                 * On Zoom2 board Set pre-scalar to 1
  54                 * CLKSEL is GND => MCR[7] is 1 => preslr is 4
  55                 * So change the prescl to 1
  56                 */
  57                com_port->lcr = 0xBF;
  58                com_port->fcr |= 0x10;
  59                com_port->mcr &= 0x7F;
  60
  61                /* This is generic ns16550.c setup */
  62                com_port->lcr = UART_LCR_BKSE | UART_LCR_8N1;
  63                com_port->dll = 0;
  64                com_port->dlm = 0;
  65                com_port->lcr = UART_LCR_8N1;
  66                com_port->mcr = UART_MCR_DTR | UART_MCR_RTS;
  67                com_port->fcr = UART_FCR_FIFO_EN | UART_FCR_RXSR |
  68                        UART_FCR_TXSR;
  69                com_port->lcr = UART_LCR_BKSE | UART_LCR_8N1;
  70                com_port->dll = baud_divisor & 0xff;
  71                com_port->dlm = (baud_divisor >> 8) & 0xff;
  72                com_port->lcr = UART_LCR_8N1;
  73        }
  74        /*
  75         * We have to lie here, otherwise the board init code will hang
  76         * on the check
  77         */
  78        return 0;
  79}
  80
  81void quad_putc_dev (unsigned long base, const char c)
  82{
  83        if (zoom2_debug_board_connected ()) {
  84
  85                if (c == '\n')
  86                        quad_putc_dev (base, '\r');
  87
  88                NS16550_putc ((NS16550_t) base, c);
  89        } else {
  90                usbtty_putc(c);
  91        }
  92}
  93
  94void quad_puts_dev (unsigned long base, const char *s)
  95{
  96        if (zoom2_debug_board_connected ()) {
  97                while ((s != NULL) && (*s != '\0'))
  98                        quad_putc_dev (base, *s++);
  99        } else {
 100                usbtty_puts(s);
 101        }
 102}
 103
 104int quad_getc_dev (unsigned long base)
 105{
 106        if (zoom2_debug_board_connected ())
 107                return NS16550_getc ((NS16550_t) base);
 108
 109        return usbtty_getc();
 110}
 111
 112int quad_tstc_dev (unsigned long base)
 113{
 114        if (zoom2_debug_board_connected ())
 115                return NS16550_tstc ((NS16550_t) base);
 116
 117        return usbtty_tstc();
 118}
 119
 120void quad_setbrg_dev (unsigned long base)
 121{
 122        if (zoom2_debug_board_connected ()) {
 123
 124                int clock_divisor = CONFIG_SYS_NS16550_CLK / 16 /
 125                        CONFIG_BAUDRATE;
 126
 127                NS16550_reinit ((NS16550_t) base, clock_divisor);
 128        }
 129}
 130
 131QUAD_INIT (0)
 132QUAD_INIT (1)
 133QUAD_INIT (2)
 134QUAD_INIT (3)
 135
 136struct serial_device *default_serial_console(void)
 137{
 138        return ZOOM2_DEFAULT_SERIAL_DEVICE;
 139}
 140