1 files changed, 147 insertions, 0 deletions
diff --git a/arch/arm/mach-mvebu/timer.c b/arch/arm/mach-mvebu/timer.c
new file mode 100644
index 0000000000..40c4bc2da1
--- /dev/null
+++ b/arch/arm/mach-mvebu/timer.c
@@ -0,0 +1,147 @@
+/*
+ * Copyright (C) Marvell International Ltd. and its affiliates
+ * Written-by: Prafulla Wadaskar <prafulla@marvell.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/soc.h>
+
+#define UBOOT_CNTR	0	/* counter to use for U-Boot timer */
+
+/*
+ * ARM Timers Registers Map
+ */
+#define CNTMR_CTRL_REG			&tmr_regs->ctrl
+#define CNTMR_RELOAD_REG(tmrnum)	&tmr_regs->tmr[tmrnum].reload
+#define CNTMR_VAL_REG(tmrnum)		&tmr_regs->tmr[tmrnum].val
+
+/*
+ * ARM Timers Control Register
+ * CPU_TIMERS_CTRL_REG (CTCR)
+ */
+#define CTCR_ARM_TIMER_EN_OFFS(cntr)	(cntr * 2)
+#define CTCR_ARM_TIMER_EN(cntr)		(1 << CTCR_ARM_TIMER_EN_OFFS(cntr))
+
+#define CTCR_ARM_TIMER_AUTO_OFFS(cntr)	((cntr * 2) + 1)
+#define CTCR_ARM_TIMER_AUTO_EN(cntr)	(1 << CTCR_ARM_TIMER_AUTO_OFFS(cntr))
+
+/* Only Armada XP have the 25MHz enable bit (Kirkwood doesn't) */
+#if defined(CONFIG_ARMADA_XP)
+#define CTCR_ARM_TIMER_25MHZ_OFFS(cntr)	(cntr + 11)
+#define CTCR_ARM_TIMER_25MHZ(cntr)	(1 << CTCR_ARM_TIMER_25MHZ_OFFS(cntr))
+#else
+#define CTCR_ARM_TIMER_25MHZ(cntr)	0
+#endif
+
+#define TIMER_LOAD_VAL 			0xffffffff
+
+#define timestamp			gd->arch.tbl
+#define lastdec				gd->arch.lastinc
+
+/* Timer reload and current value registers */
+struct kwtmr_val {
+	u32 reload;	/* Timer reload reg */
+	u32 val;	/* Timer value reg */
+};
+
+/* Timer registers */
+struct kwtmr_registers {
+	u32 ctrl;	/* Timer control reg */
+	u32 pad[3];
+	struct kwtmr_val tmr[4];
+	u32 wdt_reload;
+	u32 wdt_val;
+};
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static struct kwtmr_registers *tmr_regs =
+	(struct kwtmr_registers *)MVEBU_TIMER_BASE;
+
+static inline ulong read_timer(void)
+{
+	return readl(CNTMR_VAL_REG(UBOOT_CNTR))	/ (CONFIG_SYS_TCLK / 1000);
+}
+
+ulong get_timer_masked(void)
+{
+	ulong now = read_timer();
+
+	if (lastdec >= now) {
+		/* normal mode */
+		timestamp += lastdec - now;
+	} else {
+		/* we have an overflow ... */
+		timestamp += lastdec +
+			(TIMER_LOAD_VAL / (CONFIG_SYS_TCLK / 1000)) - now;
+	}
+	lastdec = now;
+
+	return timestamp;
+}
+
+ulong get_timer(ulong base)
+{
+	return get_timer_masked() - base;
+}
+
+void __udelay(unsigned long usec)
+{
+	uint current;
+	ulong delayticks;
+
+	current = readl(CNTMR_VAL_REG(UBOOT_CNTR));
+	delayticks = (usec * (CONFIG_SYS_TCLK / 1000000));
+
+	if (current < delayticks) {
+		delayticks -= current;
+		while (readl(CNTMR_VAL_REG(UBOOT_CNTR)) < current) ;
+		while ((TIMER_LOAD_VAL - delayticks) <
+			readl(CNTMR_VAL_REG(UBOOT_CNTR))) ;
+	} else {
+		while (readl(CNTMR_VAL_REG(UBOOT_CNTR)) >
+			(current - delayticks)) ;
+	}
+}
+
+/*
+ * init the counter
+ */
+int timer_init(void)
+{
+	/* load value into timer */
+	writel(TIMER_LOAD_VAL, CNTMR_RELOAD_REG(UBOOT_CNTR));
+	writel(TIMER_LOAD_VAL, CNTMR_VAL_REG(UBOOT_CNTR));
+
+	/* enable timer in auto reload mode */
+	clrsetbits_le32(CNTMR_CTRL_REG, CTCR_ARM_TIMER_25MHZ(UBOOT_CNTR),
+			CTCR_ARM_TIMER_EN(UBOOT_CNTR) |
+			CTCR_ARM_TIMER_AUTO_EN(UBOOT_CNTR));
+
+	/* init the timestamp and lastdec value */
+	lastdec = read_timer();
+	timestamp = 0;
+
+	return 0;
+}
+
+/*
+ * This function is derived from PowerPC code (read timebase as long long).
+ * On ARM it just returns the timer value.
+ */
+unsigned long long get_ticks(void)
+{
+	return get_timer(0);
+}
+
+/*
+ * This function is derived from PowerPC code (timebase clock frequency).
+ * On ARM it returns the number of timer ticks per second.
+ */
+ulong get_tbclk (void)
+{
+	return (ulong)CONFIG_SYS_HZ;
+}