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
diff --git a/include/nios-io.h b/include/nios-io.h
index 052c6b0..11ff78d 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 @@
/*------------------------------------------------------------------------
- * 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 @@
#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__ */
