Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / board / emk / top9000 / spi.c

diff --git a/qemu/roms/u-boot/board/emk/top9000/spi.c b/qemu/roms/u-boot/board/emk/top9000/spi.c
new file mode 100644 (file)
index 0000000..afcd00b
--- /dev/null
+++ b/qemu/roms/u-boot/board/emk/top9000/spi.c
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2010
+ * Reinhard Meyer, EMK Elektronik, reinhard.meyer@emk-elektronik.de
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#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);
+}