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

1 files changed, 220 insertions, 0 deletions

diff --git a/board/altera/common/sevenseg.c b/board/altera/common/sevenseg.c
new file mode 100644
index 0000000..fecfbd3
--- /dev/null
+++ b/board/altera/common/sevenseg.c
@@ -0,0 +1,220 @@
+/*
+ * (C) Copyright 2003, Li-Pro.Net <www.li-pro.net>
+ * Stephan Linz <linz@li-pro.net>
+ *
+ * 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
+ *
+ * common/sevenseg.c
+ *
+ * NIOS PIO based seven segment led support functions
+ */
+
+#include <common.h>
+#include <nios-io.h>
+
+#ifdef	CONFIG_SEVENSEG
+
+#define SEVENDEG_MASK_DP	((SEVENSEG_DIGIT_DP << 8) | SEVENSEG_DIGIT_DP)
+
+#ifdef	SEVENSEG_WRONLY	/* emulate read access */
+#if (SEVENSEG_ACTIVE == 0)
+static unsigned int sevenseg_portval = ~0;
+#else
+static unsigned int sevenseg_portval = 0;
+#endif
+#endif
+
+static int sevenseg_init_done = 0;
+
+static inline void __sevenseg_set_masked (unsigned int mask, int value)
+{
+	nios_pio_t *piop = (nios_pio_t*)SEVENSEG_BASE;
+
+#ifdef	SEVENSEG_WRONLY	/* emulate read access */
+
+#if (SEVENSEG_ACTIVE == 0)
+	if (value)
+		sevenseg_portval &= ~mask;
+	else
+		sevenseg_portval |= mask;
+#else
+	if (value)
+		sevenseg_portval |= mask;
+	else
+		sevenseg_portval &= ~mask;
+#endif
+
+	piop->data = sevenseg_portval;
+
+#else	/* !SEVENSEG_WRONLY */
+
+#if (SEVENSEG_ACTIVE == 0)
+	if (value)
+		piop->data &= ~mask;
+	else
+		piop->data |= mask;
+#else
+	if (value)
+		piop->data |= mask;
+	else
+		piop->data &= ~mask;
+#endif
+
+#endif	/* SEVENSEG_WRONLY */
+}
+
+static inline void __sevenseg_toggle_masked (unsigned int mask)
+{
+	nios_pio_t *piop = (nios_pio_t*)SEVENSEG_BASE;
+
+#ifdef	SEVENSEG_WRONLY	/* emulate read access */
+
+	sevenseg_portval ^= mask;
+	piop->data = sevenseg_portval;
+
+#else	/* !SEVENSEG_WRONLY */
+
+	piop->data ^= mask;
+
+#endif	/* SEVENSEG_WRONLY */
+}
+
+static inline void __sevenseg_set (unsigned int value)
+{
+	nios_pio_t *piop = (nios_pio_t*)SEVENSEG_BASE;
+
+#ifdef	SEVENSEG_WRONLY	/* emulate read access */
+
+#if (SEVENSEG_ACTIVE == 0)
+	sevenseg_portval = (sevenseg_portval &   SEVENDEG_MASK_DP)
+		         | ((~value)         & (~SEVENDEG_MASK_DP));
+#else
+	sevenseg_portval = (sevenseg_portval & SEVENDEG_MASK_DP)
+		         | (value);
+#endif
+
+	piop->data = sevenseg_portval;
+
+#else	/* !SEVENSEG_WRONLY */
+
+#if (SEVENSEG_ACTIVE == 0)
+	piop->data = (piop->data &   SEVENDEG_MASK_DP)
+		   | ((~value)   & (~SEVENDEG_MASK_DP));
+#else
+	piop->data = (piop->data & SEVENDEG_MASK_DP)
+		   | (value);
+#endif
+
+#endif	/* SEVENSEG_WRONLY */
+}
+
+static inline void __sevenseg_init (void)
+{
+	nios_pio_t *piop = (nios_pio_t*)SEVENSEG_BASE;
+
+	__sevenseg_set(0);
+
+#ifndef	SEVENSEG_WRONLY	/* setup direction */
+
+	piop->direction |= mask;
+
+#endif	/* SEVENSEG_WRONLY */
+}
+
+
+void sevenseg_set(int value)
+{
+	unsigned char	digits[] = {
+		SEVENSEG_DIGITS_0,
+		SEVENSEG_DIGITS_1,
+		SEVENSEG_DIGITS_2,
+		SEVENSEG_DIGITS_3,
+		SEVENSEG_DIGITS_4,
+		SEVENSEG_DIGITS_5,
+		SEVENSEG_DIGITS_6,
+		SEVENSEG_DIGITS_7,
+		SEVENSEG_DIGITS_8,
+		SEVENSEG_DIGITS_9,
+		SEVENSEG_DIGITS_A,
+		SEVENSEG_DIGITS_B,
+		SEVENSEG_DIGITS_C,
+		SEVENSEG_DIGITS_D,
+		SEVENSEG_DIGITS_E,
+		SEVENSEG_DIGITS_F
+	};
+
+	if (!sevenseg_init_done) {
+		__sevenseg_init();
+		sevenseg_init_done++;
+	}
+
+	switch (value & SEVENSEG_MASK_CTRL) {
+
+		case SEVENSEG_RAW:
+			__sevenseg_set( (
+				(digits[((value & SEVENSEG_MASK_VAL) >>  4)] << 8) |
+				digits[((value & SEVENSEG_MASK_VAL) & 0xf)] ) );
+			return;
+			break;	/* paranoia */
+
+		case SEVENSEG_OFF:
+			__sevenseg_set(0);
+			__sevenseg_set_masked(SEVENDEG_MASK_DP, 0);
+			return;
+			break;	/* paranoia */
+
+		case SEVENSEG_SET_DPL:
+			__sevenseg_set_masked(SEVENSEG_DIGIT_DP, 1);
+			return;
+			break;	/* paranoia */
+
+		case SEVENSEG_SET_DPH:
+			__sevenseg_set_masked((SEVENSEG_DIGIT_DP << 8), 1);
+			return;
+			break;	/* paranoia */
+
+		case SEVENSEG_RES_DPL:
+			__sevenseg_set_masked(SEVENSEG_DIGIT_DP, 0);
+			return;
+			break;	/* paranoia */
+
+		case SEVENSEG_RES_DPH:
+			__sevenseg_set_masked((SEVENSEG_DIGIT_DP << 8), 0);
+			return;
+			break;	/* paranoia */
+
+		case SEVENSEG_TOG_DPL:
+			__sevenseg_toggle_masked(SEVENSEG_DIGIT_DP);
+			return;
+			break;	/* paranoia */
+
+		case SEVENSEG_TOG_DPH:
+			__sevenseg_toggle_masked((SEVENSEG_DIGIT_DP << 8));
+			return;
+			break;	/* paranoia */
+
+		case SEVENSEG_LO:
+		case SEVENSEG_HI:
+		case SEVENSEG_STR:
+		default:
+			break;
+	}
+}
+
+#endif	/* CONFIG_SEVENSEG */