syscounter exists on i.MX6UL and i.MX7D, so implement the driver
in imx-common.
If want to use syscounter, define CONFIG_SYSCOUNTER_TIMER; if
still want to use GPT timer, #define CONFIG_GPT_TIMER.
Signed-off-by: Ye.Li <b37...@freescale.com>
Signed-off-by: Peng Fan <peng....@freescale.com>
---
arch/arm/imx-common/Makefile | 7 +-
arch/arm/imx-common/syscounter.c | 124 +++++++++++++++++++++++++++
arch/arm/imx-common/timer.c | 8 +-
arch/arm/include/asm/imx-common/syscounter.h | 29 +++++++
4 files changed, 164 insertions(+), 4 deletions(-)
create mode 100644 arch/arm/imx-common/syscounter.c
create mode 100644 arch/arm/include/asm/imx-common/syscounter.h
diff --git a/arch/arm/imx-common/Makefile b/arch/arm/imx-common/Makefile
index b9f1ca4..947c452 100644
--- a/arch/arm/imx-common/Makefile
+++ b/arch/arm/imx-common/Makefile
@@ -10,8 +10,11 @@
ifeq ($(SOC),$(filter $(SOC),mx25 mx35 mx5 mx6 vf610))
obj-y = iomux-v3.o
endif
+ifeq ($(SOC),$(filter $(SOC),mx5))
+obj-y += timer.o
+endif
ifeq ($(SOC),$(filter $(SOC),mx5 mx6))
-obj-y += timer.o cpu.o speed.o
+obj-y += cpu.o speed.o
obj-$(CONFIG_SYS_I2C_MXC) += i2c-mxv7.o
endif
ifeq ($(SOC),$(filter $(SOC),mx6 mxs))
@@ -21,6 +24,8 @@ endif
ifeq ($(SOC),$(filter $(SOC),mx6))
obj-$(CONFIG_CMD_SATA) += sata.o
obj-$(CONFIG_IMX_VIDEO_SKIP) += video.o
+obj-$(CONFIG_GPT_TIMER) += timer.o
+obj-$(CONFIG_SYSCOUNTER_TIMER) += syscounter.o
endif
ifeq ($(SOC),$(filter $(SOC),vf610))
obj-y += ddrmc-vf610.o
diff --git a/arch/arm/imx-common/syscounter.c b/arch/arm/imx-common/syscounter.c
new file mode 100644
index 0000000..1bdf281
--- /dev/null
+++ b/arch/arm/imx-common/syscounter.c
@@ -0,0 +1,124 @@
+/*
+ * Copyright (C) 2014-2015 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <div64.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/imx-common/syscounter.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*
+ * This function is intended for SHORT delays only.
+ * It will overflow at around 10 seconds @ 400MHz,
+ * or 20 seconds @ 200MHz.
+ */
+unsigned long usec2ticks(unsigned long usec)
+{
+ ulong ticks;
+
+ if (usec < 1000)
+ ticks = ((usec * (get_tbclk()/1000)) + 500) / 1000;
+ else
+ ticks = ((usec / 10) * (get_tbclk() / 100000));
+
+ return ticks;
+}
+
+static inline unsigned long long tick_to_time(unsigned long long tick)
+{
+ unsigned long freq;
+
+ asm volatile("mrc p15, 0, %0, c14, c0, 0" : "=r" (freq));
+
+ tick *= CONFIG_SYS_HZ;
+ do_div(tick, freq);
+
+ return tick;
+}
+
+static inline unsigned long long us_to_tick(unsigned long long usec)
+{
+ unsigned long freq;
+
+ asm volatile("mrc p15, 0, %0, c14, c0, 0" : "=r" (freq));
+
+ usec = usec * freq + 999999;
+ do_div(usec, 1000000);
+
+ return usec;
+}
+
+int timer_init(void)
+{
+ struct sctr_regs *sctr = (struct sctr_regs *)SCTR_BASE_ADDR;
+ unsigned long val, freq;
+
+ freq = CONFIG_SC_TIMER_CLK;
+ asm("mcr p15, 0, %0, c14, c0, 0" : : "r" (freq));
+
+ writel(freq, &sctr->cntfid0);
+
+ /* Enable system counter */
+ val = readl(&sctr->cntcr);
+ val &= ~(SC_CNTCR_FREQ0 | SC_CNTCR_FREQ1);
+ val |= SC_CNTCR_FREQ0 | SC_CNTCR_ENABLE | SC_CNTCR_HDBG;
+ writel(val, &sctr->cntcr);
+
+ gd->arch.tbl = 0;
+ gd->arch.tbu = 0;
+
+ return 0;
+}
+
+unsigned long long get_ticks(void)
+{
+ unsigned long long now;
+
+ asm("mrrc p15, 0, %Q0, %R0, c14" : "=r" (now));
+
+ gd->arch.tbl = (unsigned long)(now & 0xffffffff);
+ gd->arch.tbu = (unsigned long)(now >> 32);
+
+ return now;
+}
+
+ulong get_timer_masked(void)
+{
+ return tick_to_time(get_ticks());
+}
+
+ulong get_timer(ulong base)
+{
+ return get_timer_masked() - base;
+}
+
+void __udelay(unsigned long usec)
+{
+ unsigned long long tmp;
+ ulong tmo;
+
+ tmo = us_to_tick(usec);
+ tmp = get_ticks() + tmo; /* get current timestamp */
+
+ while (get_ticks() < tmp) /* loop till event */
+ /*NOP*/;
+}
+
+/*
+ * 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)
+{
+ unsigned long freq;
+
+ asm volatile("mrc p15, 0, %0, c14, c0, 0" : "=r" (freq));
+
+ return freq;
+}
diff --git a/arch/arm/imx-common/timer.c b/arch/arm/imx-common/timer.c
index c12556a..7262107 100644
--- a/arch/arm/imx-common/timer.c
+++ b/arch/arm/imx-common/timer.c
@@ -45,7 +45,8 @@ static inline int gpt_has_clk_source_osc(void)
#if defined(CONFIG_MX6)
if (((is_cpu_type(MXC_CPU_MX6Q) || is_cpu_type(MXC_CPU_MX6D)) &&
(soc_rev() > CHIP_REV_1_0)) || is_cpu_type(MXC_CPU_MX6DL) ||
- is_cpu_type(MXC_CPU_MX6SOLO) || is_cpu_type(MXC_CPU_MX6SX))
+ is_cpu_type(MXC_CPU_MX6SOLO) || is_cpu_type(MXC_CPU_MX6SX) ||
+ is_cpu_type(MXC_CPU_MX6UL))
return 1;
return 0;
@@ -103,10 +104,11 @@ int timer_init(void)
if (gpt_has_clk_source_osc()) {
i |= GPTCR_CLKSOURCE_OSC | GPTCR_TEN;
- /* For DL/S, SX, set 24Mhz OSC Enable bit and prescaler */
+ /* For DL/S, SX, UL, set 24Mhz OSC Enable bit and prescaler */
if (is_cpu_type(MXC_CPU_MX6DL) ||
is_cpu_type(MXC_CPU_MX6SOLO) ||
- is_cpu_type(MXC_CPU_MX6SX)) {
+ is_cpu_type(MXC_CPU_MX6SX)||
+ is_cpu_type(MXC_CPU_MX6UL)) {
i |= GPTCR_24MEN;
/* Produce 3Mhz clock */
diff --git a/arch/arm/include/asm/imx-common/syscounter.h
b/arch/arm/include/asm/imx-common/syscounter.h
new file mode 100644
index 0000000..ddb412e
--- /dev/null
+++ b/arch/arm/include/asm/imx-common/syscounter.h
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2014-2015 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef _ASM_ARCH_SYSTEM_COUNTER_H
+#define _ASM_ARCH_SYSTEM_COUNTER_H
+
+/* System Counter */
+struct sctr_regs {
+ u32 cntcr;
+ u32 cntsr;
+ u32 cntcv1;
+ u32 cntcv2;
+ u32 resv1[4];
+ u32 cntfid0;
+ u32 cntfid1;
+ u32 cntfid2;
+ u32 resv2[1001];
+ u32 counterid[1];
+};
+
+#define SC_CNTCR_ENABLE (1 << 0)
+#define SC_CNTCR_HDBG (1 << 1)
+#define SC_CNTCR_FREQ0 (1 << 8)
+#define SC_CNTCR_FREQ1 (1 << 9)
+
+#endif
--
1.8.4
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