93 lines
1.9 KiB
C
93 lines
1.9 KiB
C
/*
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* (C) Copyright 2007
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* Author: Igor Lisitsin <igor@emcraft.com>
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*
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* Copyright 2010, Stefan Roese, DENX Software Engineering, sr@denx.de
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <asm/ppc4xx.h>
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#include <ns16550.h>
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#include <asm/io.h>
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#include <serial.h>
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/*
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* UART test
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*
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* The controllers are configured to loopback mode and several
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* characters are transmitted.
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*/
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#include <post.h>
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#if CONFIG_POST & CONFIG_SYS_POST_UART
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/*
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* This table defines the UART's that should be tested and can
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* be overridden in the board config file
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*/
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#ifndef CONFIG_SYS_POST_UART_TABLE
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#define CONFIG_SYS_POST_UART_TABLE { CONFIG_SYS_NS16550_COM1, \
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CONFIG_SYS_NS16550_COM2, CONFIG_SYS_NS16550_COM3, \
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CONFIG_SYS_NS16550_COM4 }
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#endif
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DECLARE_GLOBAL_DATA_PTR;
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static int test_ctlr (struct NS16550 *com_port, int index)
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{
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int res = -1;
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char test_str[] = "*** UART Test String ***\r\n";
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int i;
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int divisor;
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divisor = (get_serial_clock() + (gd->baudrate * (16 / 2))) /
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(16 * gd->baudrate);
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NS16550_init(com_port, divisor);
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/*
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* Set internal loopback mode in UART
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*/
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out_8(&com_port->mcr, in_8(&com_port->mcr) | UART_MCR_LOOP);
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/* Reset FIFOs */
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out_8(&com_port->fcr, UART_FCR_RXSR | UART_FCR_TXSR);
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udelay(100);
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/* Flush RX-FIFO */
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while (NS16550_tstc(com_port))
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NS16550_getc(com_port);
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for (i = 0; i < sizeof (test_str) - 1; i++) {
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NS16550_putc(com_port, test_str[i]);
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if (NS16550_getc(com_port) != test_str[i])
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goto done;
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}
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res = 0;
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done:
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if (res)
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post_log ("uart%d test failed\n", index);
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return res;
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}
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int uart_post_test (int flags)
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{
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int i, res = 0;
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static unsigned long base[] = CONFIG_SYS_POST_UART_TABLE;
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for (i = 0; i < ARRAY_SIZE(base); i++) {
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if (test_ctlr((struct NS16550 *)base[i], i))
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res = -1;
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}
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serial_reinit_all ();
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return res;
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}
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#endif /* CONFIG_POST & CONFIG_SYS_POST_UART */
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