AT91: add TOP9000 support

Adds support for the EMK TOP9000 CPU Module which is
based on ATMELs ARM926EJS AT91SAM9XE SoC.

Signed-off-by: Reinhard Meyer <u-boot@emk-elektronik.de>

1 files changed, 61 insertions, 0 deletions

diff --git a/board/emk/top9000/spi.c b/board/emk/top9000/spi.c
new file mode 100644
index 0000000..b468948
--- /dev/null
+++ b/board/emk/top9000/spi.c
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2010
+ * Reinhard Meyer, EMK Elektronik, reinhard.meyer@emk-elektronik.de
+ *
+ * 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
+ */
+
+#include <common.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/at91_spi.h>
+#include <asm/arch/gpio.h>
+#include <spi.h>
+
+static const struct {
+	u32	port;
+	u32	bit;
+} cs_to_portbit[2][4] = {
+	{{AT91_PIO_PORTA,  3}, {AT91_PIO_PORTC, 11},
+			{AT91_PIO_PORTC, 16}, {AT91_PIO_PORTC, 17} },
+	{{AT91_PIO_PORTB,  3}, {AT91_PIO_PORTC,  5},
+			{AT91_PIO_PORTC,  4}, {AT91_PIO_PORTC,  3} }
+};
+
+int spi_cs_is_valid(unsigned int bus, unsigned int cs)
+{
+	debug("spi_cs_is_valid: bus=%u cs=%u\n", bus, cs);
+	if (bus < 2 && cs < 4)
+		return 1;
+	return 0;
+}
+
+void spi_cs_activate(struct spi_slave *slave)
+{
+	debug("spi_cs_activate: bus=%u cs=%u\n", slave->bus, slave->cs);
+	at91_set_pio_output(cs_to_portbit[slave->bus][slave->cs].port,
+		cs_to_portbit[slave->bus][slave->cs].bit, 0);
+}
+
+void spi_cs_deactivate(struct spi_slave *slave)
+{
+	debug("spi_cs_deactivate: bus=%u cs=%u\n", slave->bus, slave->cs);
+	at91_set_pio_output(cs_to_portbit[slave->bus][slave->cs].port,
+		cs_to_portbit[slave->bus][slave->cs].bit, 1);
+}
+