Merge branch 'master' of git://git.denx.de/u-boot-arm

1 files changed, 122 insertions, 0 deletions

diff --git a/arch/arm/cpu/arm1176/tnetv107x/timer.c b/arch/arm/cpu/arm1176/tnetv107x/timer.c
new file mode 100644
index 0000000..a7a400d
--- /dev/null
+++ b/arch/arm/cpu/arm1176/tnetv107x/timer.c
@@ -0,0 +1,122 @@
+/*
+ * TNETV107X: Timer implementation
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/clock.h>
+
+struct timer_regs {
+	u_int32_t pid12;
+	u_int32_t pad[3];
+	u_int32_t tim12;
+	u_int32_t tim34;
+	u_int32_t prd12;
+	u_int32_t prd34;
+	u_int32_t tcr;
+	u_int32_t tgcr;
+	u_int32_t wdtcr;
+};
+
+#define regs ((struct timer_regs *)CONFIG_SYS_TIMERBASE)
+
+#define TIMER_LOAD_VAL	(CONFIG_SYS_HZ_CLOCK / CONFIG_SYS_HZ)
+#define TIM_CLK_DIV	16
+
+static ulong timestamp;
+static ulong lastinc;
+
+int timer_init(void)
+{
+	clk_enable(TNETV107X_LPSC_TIMER0);
+
+	lastinc = timestamp = 0;
+
+	/* We are using timer34 in unchained 32-bit mode, full speed */
+	__raw_writel(0x0, &regs->tcr);
+	__raw_writel(0x0, &regs->tgcr);
+	__raw_writel(0x06 | ((TIM_CLK_DIV - 1) << 8), &regs->tgcr);
+	__raw_writel(0x0, &regs->tim34);
+	__raw_writel(TIMER_LOAD_VAL, &regs->prd34);
+	__raw_writel(2 << 22, &regs->tcr);
+
+	return 0;
+}
+
+void reset_timer(void)
+{
+	lastinc = timestamp = 0;
+
+	__raw_writel(0,		&regs->tcr);
+	__raw_writel(0,		&regs->tim34);
+	__raw_writel(2 << 22,	&regs->tcr);
+}
+
+static ulong get_timer_raw(void)
+{
+	ulong now = __raw_readl(&regs->tim34);
+
+	if (now >= lastinc)
+		timestamp += now - lastinc;
+	else
+		timestamp += now + TIMER_LOAD_VAL - lastinc;
+
+	lastinc = now;
+
+	return timestamp;
+}
+
+ulong get_timer(ulong base)
+{
+	return (get_timer_raw() / (TIMER_LOAD_VAL / TIM_CLK_DIV)) - base;
+}
+
+void set_timer(ulong t)
+{
+	timestamp = t;
+}
+
+unsigned long long get_ticks(void)
+{
+	return get_timer(0);
+}
+
+void __udelay(unsigned long usec)
+{
+	ulong tmo;
+	ulong endtime;
+	signed long diff;
+
+	tmo = CONFIG_SYS_HZ_CLOCK / 1000;
+	tmo *= usec;
+	tmo /= (1000 * TIM_CLK_DIV);
+
+	endtime = get_timer_raw() + tmo;
+
+	do {
+		ulong now = get_timer_raw();
+		diff = endtime - now;
+	} while (diff >= 0);
+}
+
+ulong get_tbclk(void)
+{
+	return CONFIG_SYS_HZ;
+}