* (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
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <watchdog.h>
#include <asm/io.h>
-#include <nios2-io.h>
+#include <linux/compiler.h>
+#include <serial.h>
+
+typedef volatile struct {
+ unsigned rxdata; /* Rx data reg */
+ unsigned txdata; /* Tx data reg */
+ unsigned status; /* Status reg */
+ unsigned control; /* Control reg */
+ unsigned divisor; /* Baud rate divisor reg */
+ unsigned endofpacket; /* End-of-packet reg */
+} nios_uart_t;
+
+/* status register */
+#define NIOS_UART_PE (1 << 0) /* parity error */
+#define NIOS_UART_FE (1 << 1) /* frame error */
+#define NIOS_UART_BRK (1 << 2) /* break detect */
+#define NIOS_UART_ROE (1 << 3) /* rx overrun */
+#define NIOS_UART_TOE (1 << 4) /* tx overrun */
+#define NIOS_UART_TMT (1 << 5) /* tx empty */
+#define NIOS_UART_TRDY (1 << 6) /* tx ready */
+#define NIOS_UART_RRDY (1 << 7) /* rx ready */
+#define NIOS_UART_E (1 << 8) /* exception */
+#define NIOS_UART_DCTS (1 << 10) /* cts change */
+#define NIOS_UART_CTS (1 << 11) /* cts */
+#define NIOS_UART_EOP (1 << 12) /* eop detected */
+
+/* control register */
+#define NIOS_UART_IPE (1 << 0) /* parity error int ena*/
+#define NIOS_UART_IFE (1 << 1) /* frame error int ena */
+#define NIOS_UART_IBRK (1 << 2) /* break detect int ena */
+#define NIOS_UART_IROE (1 << 3) /* rx overrun int ena */
+#define NIOS_UART_ITOE (1 << 4) /* tx overrun int ena */
+#define NIOS_UART_ITMT (1 << 5) /* tx empty int ena */
+#define NIOS_UART_ITRDY (1 << 6) /* tx ready int ena */
+#define NIOS_UART_IRRDY (1 << 7) /* rx ready int ena */
+#define NIOS_UART_IE (1 << 8) /* exception int ena */
+#define NIOS_UART_TBRK (1 << 9) /* transmit break */
+#define NIOS_UART_IDCTS (1 << 10) /* cts change int ena */
+#define NIOS_UART_RTS (1 << 11) /* rts */
+#define NIOS_UART_IEOP (1 << 12) /* eop detected int ena */
DECLARE_GLOBAL_DATA_PTR;
#if defined(CONFIG_SYS_NIOS_FIXEDBAUD)
-/* Everything's already setup for fixed-baud PTF
+/*
+ * Everything's already setup for fixed-baud PTF
* assignment
*/
-void serial_setbrg (void){ return; }
-int serial_init (void) { return (0);}
+static void altera_serial_setbrg(void)
+{
+}
+
+static int altera_serial_init(void)
+{
+ return 0;
+}
#else
-void serial_setbrg (void)
+static void altera_serial_setbrg(void)
{
unsigned div;
div = (CONFIG_SYS_CLK_FREQ/gd->baudrate)-1;
writel (div, &uart->divisor);
- return;
}
-int serial_init (void)
+static int altera_serial_init(void)
{
- serial_setbrg ();
- return (0);
+ serial_setbrg();
+ return 0;
}
#endif /* CONFIG_SYS_NIOS_FIXEDBAUD */
/*-----------------------------------------------------------------------
* UART CONSOLE
*---------------------------------------------------------------------*/
-void serial_putc (char c)
+static void altera_serial_putc(char c)
{
if (c == '\n')
serial_putc ('\r');
writel ((unsigned char)c, &uart->txdata);
}
-void serial_puts (const char *s)
-{
- while (*s != 0) {
- serial_putc (*s++);
- }
-}
-
-int serial_tstc (void)
+static int altera_serial_tstc(void)
{
return (readl (&uart->status) & NIOS_UART_RRDY);
}
-int serial_getc (void)
+static int altera_serial_getc(void)
{
while (serial_tstc () == 0)
WATCHDOG_RESET ();
return (readl (&uart->rxdata) & 0x00ff );
}
+
+static struct serial_device altera_serial_drv = {
+ .name = "altera_serial",
+ .start = altera_serial_init,
+ .stop = NULL,
+ .setbrg = altera_serial_setbrg,
+ .putc = altera_serial_putc,
+ .puts = default_serial_puts,
+ .getc = altera_serial_getc,
+ .tstc = altera_serial_tstc,
+};
+
+void altera_serial_initialize(void)
+{
+ serial_register(&altera_serial_drv);
+}
+
+__weak struct serial_device *default_serial_console(void)
+{
+ return &altera_serial_drv;
+}