serial: Support an early UART for debugging

[karo-tx-uboot.git] / drivers / serial / altera_uart.c

diff --git a/drivers/serial/altera_uart.c b/drivers/serial/altera_uart.c
index 118cd58ece85e6e6fb9102cb3ec7c78157f3488d..d6b14844d67e519a3e40064b2842cf8c3da54b4e 100644 (file)
--- a/drivers/serial/altera_uart.c
+++ b/drivers/serial/altera_uart.c
@@ -2,33 +2,54 @@
  * (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;
 
 /*------------------------------------------------------------------