From c935d3bd8b1c7f681ad58e64bd0548e1b26a7d2f Mon Sep 17 00:00:00 2001
From: wdenk <wdenk>
Date: Sat, 3 Jan 2004 19:43:48 +0000
Subject: Patches by Stephan Linz, 11 Dec 2003: - more documentation for NIOS
 port - new struct nios_pio_t, struct nios_spi_t - Reconfiguration for NIOS
 Development Kit DK1C20:   o move board related code from board/dk1c20     to
 board/altera/dk1c20   o create a new common source path board/altera/common  
   and move generic flash access stuff into it   o change/expand configuration
 file DK1C20.h - Add support for NIOS Development Kit DK1S10 - Add status LED
 support for NIOS systems - Add dual 7-segment LED support for Altera NIOS
 DevKits

---
 include/nios-io.h | 48 ++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 46 insertions(+), 2 deletions(-)

(limited to 'include/nios-io.h')

diff --git a/include/nios-io.h b/include/nios-io.h
index 052c6b0b56..11ff78d076 100644
--- a/include/nios-io.h
+++ b/include/nios-io.h
@@ -29,7 +29,7 @@
 #define __NIOSIO_H__
 
 /*------------------------------------------------------------------------
- * UART
+ * UART (http://www.altera.com/literature/ds/ds_nios_uart.pdf)
  *----------------------------------------------------------------------*/
 typedef volatile struct nios_uart_t {
 	unsigned	rxdata;		/* Rx data reg */
@@ -71,7 +71,7 @@ typedef volatile struct nios_uart_t {
 
 
 /*------------------------------------------------------------------------
- * TIMER
+ * TIMER (http://www.altera.com/literature/ds/ds_nios_timer.pdf)
  *----------------------------------------------------------------------*/
 typedef volatile struct nios_timer_t {
 	unsigned	status;			/* Timer status reg */
@@ -92,4 +92,48 @@ typedef volatile struct nios_timer_t {
 #define NIOS_TIMER_START	(1 << 2)	/* Start timer */
 #define NIOS_TIMER_STOP		(1 << 3)	/* Stop timer */
 
+
+/*------------------------------------------------------------------------
+ * PIO (http://www.altera.com/literature/ds/ds_nios_pio.pdf)
+ *----------------------------------------------------------------------*/
+typedef volatile struct nios_pio_t {
+	unsigned int	data;		/* Data value at each PIO in/out */
+	unsigned int	direction;	/* Data direct. for each PIO bit */
+	unsigned int	interruptmask;	/* Per-bit IRQ enable/disable */
+	unsigned int	edgecapture;	/* Per-bit sync. edge detect & hold */
+}nios_pio_t;
+
+/* direction register */
+#define NIOS_PIO_OUT		(1)		/* PIO bit is output */
+#define NIOS_PIO_IN		(0)		/* PIO bit is input */
+
+
+/*------------------------------------------------------------------------
+ * SPI (http://www.altera.com/literature/ds/ds_nios_spi.pdf)
+ *----------------------------------------------------------------------*/
+typedef volatile struct nios_spi_t {
+	unsigned	rxdata;		/* Rx data reg */
+	unsigned	txdata;		/* Tx data reg */
+	unsigned	status;		/* Status reg */
+	unsigned	control;	/* Control reg */
+	unsigned	reserved;	/* (master only) */
+	unsigned	slaveselect;	/* SPI slave selct mask (master only) */
+}nios_spi_t;
+
+/* status register */
+#define NIOS_SPI_ROE		(1 << 3)	/* rx overrun */
+#define NIOS_SPI_TOE		(1 << 4)	/* tx overrun */
+#define NIOS_SPI_TMT		(1 << 5)	/* tx empty */
+#define NIOS_SPI_TRDY		(1 << 6)	/* tx ready */
+#define NIOS_SPI_RRDY		(1 << 7)	/* rx ready */
+#define NIOS_SPI_E		(1 << 8)	/* exception */
+
+/* control register */
+#define NIOS_SPI_IROE		(1 << 3)	/* rx overrun int ena */
+#define NIOS_SPI_ITOE		(1 << 4)	/* tx overrun int ena */
+#define NIOS_SPI_ITRDY		(1 << 6)	/* tx ready int ena */
+#define NIOS_SPI_IRRDY		(1 << 7)	/* rx ready int ena */
+#define NIOS_SPI_IE		(1 << 8)	/* exception int ena */
+#define NIOS_SPI_SSO		(1 << 10)	/* override SS_n output */
+
 #endif /* __NIOSIO_H__ */
-- 
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