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-rw-r--r--drivers/serial/Makefile3
-rw-r--r--drivers/serial/altera_jtag_uart.c70
-rw-r--r--drivers/serial/altera_uart.c94
-rw-r--r--drivers/serial/opencores_yanu.c188
4 files changed, 355 insertions, 0 deletions
diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile
index 3c77a7c..d2b4820 100644
--- a/drivers/serial/Makefile
+++ b/drivers/serial/Makefile
@@ -25,11 +25,14 @@ include $(TOPDIR)/config.mk
LIB := $(obj)libserial.a
+COBJS-$(CONFIG_ALTERA_UART) += altera_uart.o
+COBJS-$(CONFIG_ALTERA_JTAG_UART) += altera_jtag_uart.o
COBJS-$(CONFIG_ARM_DCC) += arm_dcc.o
COBJS-$(CONFIG_AT91RM9200_USART) += at91rm9200_usart.o
COBJS-$(CONFIG_ATMEL_USART) += atmel_usart.o
COBJS-$(CONFIG_MCFUART) += mcfuart.o
COBJS-$(CONFIG_NS9750_UART) += ns9750_serial.o
+COBJS-$(CONFIG_OPENCORES_YANU) += opencores_yanu.o
COBJS-$(CONFIG_SYS_NS16550) += ns16550.o
COBJS-$(CONFIG_DRIVER_S3C4510_UART) += s3c4510b_uart.o
COBJS-$(CONFIG_S3C64XX) += s3c64xx.o
diff --git a/drivers/serial/altera_jtag_uart.c b/drivers/serial/altera_jtag_uart.c
new file mode 100644
index 0000000..fb28aa9
--- /dev/null
+++ b/drivers/serial/altera_jtag_uart.c
@@ -0,0 +1,70 @@
+/*
+ * (C) Copyright 2004, Psyent Corporation <www.psyent.com>
+ * Scott McNutt <smcnutt@psyent.com>
+ *
+ * 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>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*------------------------------------------------------------------
+ * JTAG acts as the serial port
+ *-----------------------------------------------------------------*/
+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)
+{
+ while (NIOS_JTAG_WSPACE ( readl (&jtag->control)) == 0)
+ WATCHDOG_RESET ();
+ writel ((unsigned char)c, &jtag->data);
+}
+
+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);
+}
diff --git a/drivers/serial/altera_uart.c b/drivers/serial/altera_uart.c
new file mode 100644
index 0000000..045f119
--- /dev/null
+++ b/drivers/serial/altera_uart.c
@@ -0,0 +1,94 @@
+/*
+ * (C) Copyright 2004, Psyent Corporation <www.psyent.com>
+ * Scott McNutt <smcnutt@psyent.com>
+ *
+ * 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>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*------------------------------------------------------------------
+ * 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 (div, &uart->divisor);
+ 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 ((unsigned char)c, &uart->txdata);
+}
+
+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 );
+}
diff --git a/drivers/serial/opencores_yanu.c b/drivers/serial/opencores_yanu.c
new file mode 100644
index 0000000..f18f7f4
--- /dev/null
+++ b/drivers/serial/opencores_yanu.c
@@ -0,0 +1,188 @@
+/*
+ * 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-yanu.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*-----------------------------------------------------------------*/
+/* 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(baud, &uart->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(baud, &uart->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(action, &uart->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(control, &uart->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((unsigned char)c, &uart->data);
+}
+
+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(YANU_ACTION_RFIFO_PULL, &uart->action);
+
+ return(readl(&uart->data) & YANU_DATA_CHAR_MASK);
+}
generated by cgit v1.1 at 2024-12-25 22:10:39 +0000