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@@ -2,7 +2,7 @@
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* (C) Copyright 2009
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* Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
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*
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- * (C) Copyright 2007-2010
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+ * (C) Copyright 2007-2012
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* Nobobuhiro Iwamatsu <iwamatsu@nigauri.org>
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*
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* (C) Copyright 2003
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@@ -30,71 +30,54 @@
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#include <common.h>
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#include <div64.h>
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#include <asm/processor.h>
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-#include <asm/clk.h>
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#include <asm/io.h>
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+#include <sh_tmu.h>
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-#define TMU_MAX_COUNTER (~0UL)
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+static struct tmu_regs *tmu = (struct tmu_regs *)TMU_BASE;
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-static ulong timer_freq;
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+static u16 bit;
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static unsigned long last_tcnt;
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static unsigned long long overflow_ticks;
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+unsigned long get_tbclk(void)
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+{
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+ return get_tmu0_clk_rate() >> ((bit + 1) * 2);
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+}
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+
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static inline unsigned long long tick_to_time(unsigned long long tick)
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{
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tick *= CONFIG_SYS_HZ;
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- do_div(tick, timer_freq);
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+ do_div(tick, get_tbclk());
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return tick;
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}
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static inline unsigned long long usec_to_tick(unsigned long long usec)
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{
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- usec *= timer_freq;
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+ usec *= get_tbclk();
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do_div(usec, 1000000);
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return usec;
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}
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-static void tmu_timer_start (unsigned int timer)
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+static void tmu_timer_start(unsigned int timer)
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{
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if (timer > 2)
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return;
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- writeb(readb(TSTR) | (1 << timer), TSTR);
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+ writeb(readb(&tmu->tstr) | (1 << timer), &tmu->tstr);
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}
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-static void tmu_timer_stop (unsigned int timer)
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+static void tmu_timer_stop(unsigned int timer)
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{
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if (timer > 2)
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return;
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- writeb(readb(TSTR) & ~(1 << timer), TSTR);
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+ writeb(readb(&tmu->tstr) & ~(1 << timer), &tmu->tstr);
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}
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-int timer_init (void)
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+int timer_init(void)
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{
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- /* Divide clock by CONFIG_SYS_TMU_CLK_DIV */
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- u16 bit = 0;
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-
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- switch (CONFIG_SYS_TMU_CLK_DIV) {
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- case 1024:
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- bit = 4;
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- break;
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- case 256:
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- bit = 3;
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- break;
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- case 64:
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- bit = 2;
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- break;
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- case 16:
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- bit = 1;
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- break;
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- case 4:
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- default:
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- break;
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- }
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- writew(readw(TCR0) | bit, TCR0);
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-
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- /* Calc clock rate */
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- timer_freq = get_tmu0_clk_rate() >> ((bit + 1) * 2);
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+ bit = (ffs(CONFIG_SYS_TMU_CLK_DIV) >> 1) - 1;
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+ writew(readw(&tmu->tcr0) | bit, &tmu->tcr0);
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tmu_timer_stop(0);
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tmu_timer_start(0);
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@@ -105,9 +88,9 @@ int timer_init (void)
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return 0;
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}
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-unsigned long long get_ticks (void)
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+unsigned long long get_ticks(void)
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{
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- unsigned long tcnt = 0 - readl(TCNT0);
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+ unsigned long tcnt = 0 - readl(&tmu->tcnt0);
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if (last_tcnt > tcnt) /* overflow */
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overflow_ticks++;
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@@ -116,7 +99,7 @@ unsigned long long get_ticks (void)
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return (overflow_ticks << 32) | tcnt;
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}
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-void __udelay (unsigned long usec)
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+void __udelay(unsigned long usec)
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{
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unsigned long long tmp;
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ulong tmo;
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@@ -128,13 +111,20 @@ void __udelay (unsigned long usec)
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/*NOP*/;
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}
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-unsigned long get_timer (unsigned long base)
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+unsigned long get_timer(unsigned long base)
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{
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/* return msec */
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return tick_to_time(get_ticks()) - base;
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}
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-unsigned long get_tbclk (void)
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+void set_timer(unsigned long t)
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+{
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+ writel((0 - t), &tmu->tcnt0);
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+}
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+
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+void reset_timer(void)
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{
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- return timer_freq;
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+ tmu_timer_stop(0);
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+ set_timer(0);
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+ tmu_timer_start(0);
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}
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