From: Sebastien Bourdeauducq <sebastien@milkymist.org>
Date: Mon, 6 Feb 2012 16:53:41 +0000 (+0100)
Subject: software: use new UART
X-Git-Tag: 24jan2021_ls180~3259
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=5cde57cb653839ec6265a9b60440522d23b2215d;p=litex.git

software: use new UART
---

diff --git a/software/bios/main.c b/software/bios/main.c
index c479dfcf..b2f90e3b 100644
--- a/software/bios/main.c
+++ b/software/bios/main.c
@@ -3,7 +3,7 @@
 static void print(const char *s)
 {
 	while(*s) {
-		while(!(CSR_UART_STAT & UART_STAT_THRE));
+		while(CSR_UART_EV_STAT & UART_EV_TX);
 		CSR_UART_RXTX = *s;
 		s++;
 	}
diff --git a/software/include/hw/uart.h b/software/include/hw/uart.h
index 5540ca44..c9e1e194 100644
--- a/software/include/hw/uart.h
+++ b/software/include/hw/uart.h
@@ -1,6 +1,6 @@
 /*
  * Milkymist SoC (Software)
- * Copyright (C) 2007, 2008, 2009, 2010 Sebastien Bourdeauducq
+ * Copyright (C) 2007, 2008, 2009, 2010, 2012 Sebastien Bourdeauducq
  *
  * 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
@@ -21,19 +21,14 @@
 #include <hw/common.h>
 
 #define CSR_UART_RXTX 		MMPTR(0xe0000000)
-#define CSR_UART_DIVISOR	MMPTR(0xe0000004)
-#define CSR_UART_STAT		MMPTR(0xe0000008)
-#define CSR_UART_CTRL		MMPTR(0xe000000c)
-#define CSR_UART_DEBUG		MMPTR(0xe0000010)
+#define CSR_UART_DIVISORH	MMPTR(0xe0000004)
+#define CSR_UART_DIVISORL	MMPTR(0xe0000008)
 
-#define UART_STAT_THRE		(0x1)
-#define UART_STAT_RX_EVT	(0x2)
-#define UART_STAT_TX_EVT	(0x4)
+#define CSR_UART_EV_STAT	MMPTR(0xe000000c)
+#define CSR_UART_EV_PENDING	MMPTR(0xe0000010)
+#define CSR_UART_EV_ENABLE	MMPTR(0xe0000014)
 
-#define UART_CTRL_RX_INT	(0x1)
-#define UART_CTRL_TX_INT	(0x2)
-#define UART_CTRL_THRU		(0x4)
-
-#define UART_DEBUG_BREAK_EN	(0x1)
+#define UART_EV_TX		(0x1)
+#define UART_EV_RX		(0x2)
 
 #endif /* __HW_UART_H */
diff --git a/software/libbase/uart.c b/software/libbase/uart.c
index 9ec12ab1..6ca28629 100644
--- a/software/libbase/uart.c
+++ b/software/libbase/uart.c
@@ -44,14 +44,14 @@ static volatile int tx_cts;
 
 void uart_isr(void)
 {
-	unsigned int stat = CSR_UART_STAT;
+	unsigned int stat = CSR_UART_EV_PENDING;
 
-	if(stat & UART_STAT_RX_EVT) {
+	if(stat & UART_EV_RX) {
 		rx_buf[rx_produce] = CSR_UART_RXTX;
 		rx_produce = (rx_produce + 1) & UART_RINGBUFFER_MASK_RX;
 	}
 
-	if(stat & UART_STAT_TX_EVT) {
+	if(stat & UART_EV_TX) {
 		if(tx_produce != tx_consume) {
 			CSR_UART_RXTX = tx_buf[tx_consume];
 			tx_consume = (tx_consume + 1) & UART_RINGBUFFER_MASK_TX;
@@ -59,7 +59,7 @@ void uart_isr(void)
 			tx_cts = 1;
 	}
 
-	CSR_UART_STAT = stat;
+	CSR_UART_EV_PENDING = stat;
 	irq_ack(IRQ_UART);
 }
 
@@ -109,10 +109,10 @@ void uart_init(void)
 	irq_ack(IRQ_UART);
 
 	/* ack any events */
-	CSR_UART_STAT = CSR_UART_STAT;
+	CSR_UART_EV_PENDING = CSR_UART_EV_PENDING;
 
 	/* enable interrupts */
-	CSR_UART_CTRL = UART_CTRL_TX_INT | UART_CTRL_RX_INT;
+	CSR_UART_EV_ENABLE = UART_EV_TX | UART_EV_RX;
 
 	mask = irq_getmask();
 	mask |= IRQ_UART;