arm926ejs: add NXP LPC32x0 cpu series support
This change adds initial support for NXP LPC32x0 SoC series.
Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
Acked-by: Marek Vasut <marek.vasut@gmail.com>
diff --git a/arch/arm/cpu/arm926ejs/lpc32xx/timer.c b/arch/arm/cpu/arm926ejs/lpc32xx/timer.c
new file mode 100644
index 0000000..1ce2358
--- /dev/null
+++ b/arch/arm/cpu/arm926ejs/lpc32xx/timer.c
@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2011 Vladimir Zapolskiy <vz@mleia.com>
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+
+#include <common.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/clk.h>
+#include <asm/arch/timer.h>
+#include <asm/io.h>
+
+static struct timer_regs *timer0 = (struct timer_regs *)TIMER0_BASE;
+static struct timer_regs *timer1 = (struct timer_regs *)TIMER1_BASE;
+static struct clk_pm_regs *clk = (struct clk_pm_regs *)CLK_PM_BASE;
+
+static void lpc32xx_timer_clock(u32 bit, int enable)
+{
+ if (enable)
+ setbits_le32(&clk->timclk_ctrl1, bit);
+ else
+ clrbits_le32(&clk->timclk_ctrl1, bit);
+}
+
+static void lpc32xx_timer_reset(struct timer_regs *timer, u32 freq)
+{
+ writel(TIMER_TCR_COUNTER_RESET, &timer->tcr);
+ writel(TIMER_TCR_COUNTER_DISABLE, &timer->tcr);
+ writel(0, &timer->tc);
+ writel(0, &timer->pr);
+
+ /* Count mode is every rising PCLK edge */
+ writel(TIMER_CTCR_MODE_TIMER, &timer->ctcr);
+
+ /* Set prescale counter value */
+ writel((get_periph_clk_rate() / freq) - 1, &timer->pr);
+}
+
+static void lpc32xx_timer_count(struct timer_regs *timer, int enable)
+{
+ if (enable)
+ writel(TIMER_TCR_COUNTER_ENABLE, &timer->tcr);
+ else
+ writel(TIMER_TCR_COUNTER_DISABLE, &timer->tcr);
+}
+
+int timer_init(void)
+{
+ lpc32xx_timer_clock(CLK_TIMCLK_TIMER0, 1);
+ lpc32xx_timer_reset(timer0, CONFIG_SYS_HZ);
+ lpc32xx_timer_count(timer0, 1);
+
+ return 0;
+}
+
+ulong get_timer(ulong base)
+{
+ return readl(&timer0->tc) - base;
+}
+
+void __udelay(unsigned long usec)
+{
+ lpc32xx_timer_clock(CLK_TIMCLK_TIMER1, 1);
+ lpc32xx_timer_reset(timer1, CONFIG_SYS_HZ * 1000);
+ lpc32xx_timer_count(timer1, 1);
+
+ while (readl(&timer1->tc) < usec)
+ /* NOP */;
+
+ lpc32xx_timer_count(timer1, 0);
+ lpc32xx_timer_clock(CLK_TIMCLK_TIMER1, 0);
+}
+
+unsigned long long get_ticks(void)
+{
+ return get_timer(0);
+}
+
+ulong get_tbclk(void)
+{
+ return CONFIG_SYS_HZ;
+}