1 files changed, 55 insertions, 0 deletions
diff --git a/drivers/arm/sp804/sp804_delay_timer.c b/drivers/arm/sp804/sp804_delay_timer.c
new file mode 100644
index 00000000..8f1c5c51
--- /dev/null
+++ b/drivers/arm/sp804/sp804_delay_timer.c
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+#include <delay_timer.h>
+#include <mmio.h>
+
+uintptr_t sp804_base_addr;
+
+#define SP804_TIMER1_LOAD	(sp804_base_addr + 0x000)
+#define SP804_TIMER1_VALUE	(sp804_base_addr + 0x004)
+#define SP804_TIMER1_CONTROL	(sp804_base_addr + 0x008)
+#define SP804_TIMER1_BGLOAD	(sp804_base_addr + 0x018)
+
+#define TIMER_CTRL_ONESHOT	(1 << 0)
+#define TIMER_CTRL_32BIT	(1 << 1)
+#define TIMER_CTRL_DIV1		(0 << 2)
+#define TIMER_CTRL_DIV16	(1 << 2)
+#define TIMER_CTRL_DIV256	(2 << 2)
+#define TIMER_CTRL_IE		(1 << 5)
+#define TIMER_CTRL_PERIODIC	(1 << 6)
+#define TIMER_CTRL_ENABLE	(1 << 7)
+
+/********************************************************************
+ * The SP804 timer delay function
+ ********************************************************************/
+uint32_t sp804_get_timer_value(void)
+{
+	return mmio_read_32(SP804_TIMER1_VALUE);
+}
+
+/********************************************************************
+ * Initialize the 1st timer in the SP804 dual timer with a base
+ * address and a timer ops
+ ********************************************************************/
+void sp804_timer_ops_init(uintptr_t base_addr, const timer_ops_t *ops)
+{
+	assert(base_addr != 0);
+	assert(ops != 0 && ops->get_timer_value == sp804_get_timer_value);
+
+	sp804_base_addr = base_addr;
+	timer_init(ops);
+
+	/* disable timer1 */
+	mmio_write_32(SP804_TIMER1_CONTROL, 0);
+	mmio_write_32(SP804_TIMER1_LOAD, UINT32_MAX);
+	mmio_write_32(SP804_TIMER1_VALUE, UINT32_MAX);
+
+	/* enable as a free running 32-bit counter */
+	mmio_write_32(SP804_TIMER1_CONTROL,
+			TIMER_CTRL_32BIT | TIMER_CTRL_ENABLE);
+}