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-rw-r--r--cpu/nios2/serial.c309
1 files changed, 0 insertions, 309 deletions
diff --git a/cpu/nios2/serial.c b/cpu/nios2/serial.c
deleted file mode 100644
index 6c835af..0000000
--- a/cpu/nios2/serial.c
+++ /dev/null
@@ -1,309 +0,0 @@
-/*
- * (C) Copyright 2004, Psyent Corporation <www.psyent.com>
- * Scott McNutt <smcnutt@psyent.com>
- *
- * YANU Support:
- * Copyright 2010, Renato Andreola <renato.andreola@imagos.it>
- *
- * 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 <watchdog.h>
-#include <asm/io.h>
-#include <nios2-io.h>
-#include <nios2-yanu.h>
-
-DECLARE_GLOBAL_DATA_PTR;
-
-/*------------------------------------------------------------------
- * JTAG acts as the serial port
- *-----------------------------------------------------------------*/
-#if defined(CONFIG_CONSOLE_JTAG)
-
-static nios_jtag_t *jtag = (nios_jtag_t *)CONFIG_SYS_NIOS_CONSOLE;
-
-void serial_setbrg( void ){ return; }
-int serial_init( void ) { return(0);}
-
-void serial_putc (char c)
-{
- unsigned val;
-
- while (NIOS_JTAG_WSPACE ( readl (&jtag->control)) == 0)
- WATCHDOG_RESET ();
- writel (&jtag->data, (unsigned char)c);
-}
-
-void serial_puts (const char *s)
-{
- while (*s != 0)
- serial_putc (*s++);
-}
-
-int serial_tstc (void)
-{
- return ( readl (&jtag->control) & NIOS_JTAG_RRDY);
-}
-
-int serial_getc (void)
-{
- int c;
- unsigned val;
-
- while (1) {
- WATCHDOG_RESET ();
- val = readl (&jtag->data);
- if (val & NIOS_JTAG_RVALID)
- break;
- }
- c = val & 0x0ff;
- return (c);
-}
-
-#elif defined(CONFIG_CONSOLE_YANU)
-/*-----------------------------------------------------------------*/
-/* YANU Imagos serial port */
-/*-----------------------------------------------------------------*/
-
-static yanu_uart_t *uart = (yanu_uart_t *)CONFIG_SYS_NIOS_CONSOLE;
-
-#if defined(CONFIG_SYS_NIOS_FIXEDBAUD)
-
-/* Everything's already setup for fixed-baud PTF assignment*/
-
-void serial_setbrg (void)
-{
- int n, k;
- const unsigned max_uns = 0xFFFFFFFF;
- unsigned best_n, best_m, baud;
-
- /* compute best N and M couple */
- best_n = YANU_MAX_PRESCALER_N;
- for (n = YANU_MAX_PRESCALER_N; n >= 0; n--) {
- if ((unsigned)CONFIG_SYS_CLK_FREQ / (1 << (n + 4)) >=
- (unsigned)CONFIG_BAUDRATE) {
- best_n = n;
- break;
- }
- }
- for (k = 0;; k++) {
- if ((unsigned)CONFIG_BAUDRATE <= (max_uns >> (15+n-k)))
- break;
- }
- best_m =
- ((unsigned)CONFIG_BAUDRATE * (1 << (15 + n - k))) /
- ((unsigned)CONFIG_SYS_CLK_FREQ >> k);
-
- baud = best_m + best_n * YANU_BAUDE;
- writel(&uart->baud, baud);
-
- return;
-}
-
-#else
-
-void serial_setbrg (void)
-{
- int n, k;
- const unsigned max_uns = 0xFFFFFFFF;
- unsigned best_n, best_m, baud;
-
- /* compute best N and M couple */
- best_n = YANU_MAX_PRESCALER_N;
- for (n = YANU_MAX_PRESCALER_N; n >= 0; n--) {
- if ((unsigned)CONFIG_SYS_CLK_FREQ / (1 << (n + 4)) >=
- gd->baudrate) {
- best_n = n;
- break;
- }
- }
- for (k = 0;; k++) {
- if (gd->baudrate <= (max_uns >> (15+n-k)))
- break;
- }
- best_m =
- (gd->baudrate * (1 << (15 + n - k))) /
- ((unsigned)CONFIG_SYS_CLK_FREQ >> k);
-
- baud = best_m + best_n * YANU_BAUDE;
- writel(&uart->baud, baud);
-
- return;
-}
-
-
-#endif /* CONFIG_SYS_NIOS_FIXEDBAUD */
-
-int serial_init (void)
-{
- unsigned action,control;
-
- /* status register cleanup */
- action = YANU_ACTION_RRRDY |
- YANU_ACTION_RTRDY |
- YANU_ACTION_ROE |
- YANU_ACTION_RBRK |
- YANU_ACTION_RFE |
- YANU_ACTION_RPE |
- YANU_ACTION_RFE | YANU_ACTION_RFIFO_CLEAR | YANU_ACTION_TFIFO_CLEAR;
-
- writel(&uart->action, action);
-
- /* control register cleanup */
- /* no interrupts enabled */
- /* one stop bit */
- /* hardware flow control disabled */
- /* 8 bits */
- control = (0x7 << YANU_CONTROL_BITS_POS);
- /* enven parity just to be clean */
- control |= YANU_CONTROL_PAREVEN;
- /* we set threshold for fifo */
- control |= YANU_CONTROL_RDYDLY * YANU_RXFIFO_DLY;
- control |= YANU_CONTROL_TXTHR * YANU_TXFIFO_THR;
-
- writel(&uart->control, control);
-
- /* to set baud rate */
- serial_setbrg();
-
- return (0);
-}
-
-
-/*-----------------------------------------------------------------------
- * YANU CONSOLE
- *---------------------------------------------------------------------*/
-void serial_putc (char c)
-{
- int tx_chars;
- unsigned status;
-
- if (c == '\n')
- serial_putc ('\r');
-
- while (1) {
- status = readl(&uart->status);
- tx_chars = (status>>YANU_TFIFO_CHARS_POS)
- & ((1<<YANU_TFIFO_CHARS_N)-1);
- if (tx_chars < YANU_TXFIFO_SIZE-1)
- break;
- WATCHDOG_RESET ();
- }
-
- writel(&uart->data, (unsigned char)c);
-}
-
-void serial_puts (const char *s)
-{
- while (*s != 0) {
- serial_putc (*s++);
- }
-}
-
-
-int serial_tstc(void)
-{
- unsigned status ;
-
- status = readl(&uart->status);
- return (((status >> YANU_RFIFO_CHARS_POS) &
- ((1 << YANU_RFIFO_CHARS_N) - 1)) > 0);
-}
-
-int serial_getc (void)
-{
- while (serial_tstc() == 0)
- WATCHDOG_RESET ();
-
- /* first we pull the char */
- writel(&uart->action, YANU_ACTION_RFIFO_PULL);
-
- return(readl(&uart->data) & YANU_DATA_CHAR_MASK);
-}
-
-#else /*CONFIG_CONSOLE_YANU*/
-
-/*------------------------------------------------------------------
- * UART the serial port
- *-----------------------------------------------------------------*/
-
-static nios_uart_t *uart = (nios_uart_t *) CONFIG_SYS_NIOS_CONSOLE;
-
-#if defined(CONFIG_SYS_NIOS_FIXEDBAUD)
-
-/* Everything's already setup for fixed-baud PTF
- * assignment
- */
-void serial_setbrg (void){ return; }
-int serial_init (void) { return (0);}
-
-#else
-
-void serial_setbrg (void)
-{
- unsigned div;
-
- div = (CONFIG_SYS_CLK_FREQ/gd->baudrate)-1;
- writel (&uart->divisor,div);
- return;
-}
-
-int serial_init (void)
-{
- serial_setbrg ();
- return (0);
-}
-
-#endif /* CONFIG_SYS_NIOS_FIXEDBAUD */
-
-
-/*-----------------------------------------------------------------------
- * UART CONSOLE
- *---------------------------------------------------------------------*/
-void serial_putc (char c)
-{
- if (c == '\n')
- serial_putc ('\r');
- while ((readl (&uart->status) & NIOS_UART_TRDY) == 0)
- WATCHDOG_RESET ();
- writel (&uart->txdata,(unsigned char)c);
-}
-
-void serial_puts (const char *s)
-{
- while (*s != 0) {
- serial_putc (*s++);
- }
-}
-
-int serial_tstc (void)
-{
- return (readl (&uart->status) & NIOS_UART_RRDY);
-}
-
-int serial_getc (void)
-{
- while (serial_tstc () == 0)
- WATCHDOG_RESET ();
- return (readl (&uart->rxdata) & 0x00ff );
-}
-
-#endif /* CONFIG_JTAG_CONSOLE */
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