On Tue, Nov 10, 2015 at 2:24 AM, Lin Huang hl@rock-chips.com wrote:
some rockchip soc will not include lib/timer.c in SPL stage, so implement timer driver for some soc can use us delay function in SPL.
Signed-off-by: Lin Huang hl@rock-chips.com Acked-by: Simon Glass sjg@chromium.org
Changes in v1: None Changes in v2:
- add udelay function
Changes in v3:
- fix some coding style
Changes in v4: None Changes in v5: None
arch/arm/include/asm/arch-rockchip/timer.h | 22 ++++++++++++++ arch/arm/mach-rockchip/Makefile | 1 + arch/arm/mach-rockchip/board-spl.c | 21 ++----------- arch/arm/mach-rockchip/rk_timer.c | 48 ++++++++++++++++++++++++++++++ include/configs/rk3288_common.h | 3 +- 5 files changed, 75 insertions(+), 20 deletions(-) create mode 100644 arch/arm/include/asm/arch-rockchip/timer.h create mode 100644 arch/arm/mach-rockchip/rk_timer.c
diff --git a/arch/arm/include/asm/arch-rockchip/timer.h b/arch/arm/include/asm/arch-rockchip/timer.h new file mode 100644 index 0000000..59444d4 --- /dev/null +++ b/arch/arm/include/asm/arch-rockchip/timer.h @@ -0,0 +1,22 @@ +/*
- (C) Copyright 2015 Rockchip Electronics Co., Ltd
- SPDX-License-Identifier: GPL-2.0+
- */
+#ifndef __ASM_ARCH_TIMER_H +#define __ASM_ARCH_TIMER_H
+struct rk_timer {
question: should these use sized integer type?
unsigned int timer_load_count0;
nit: it may be clearer to use _l / _h suffix instead of 0 / 1
unsigned int timer_load_count1;unsigned int timer_curr_value0;unsigned int timer_curr_value1;unsigned int timer_ctrl_reg;unsigned int timer_int_status;+};
+void rockchip_timer_init(void); +void rockchip_udelay(unsigned int us);
+#endif diff --git a/arch/arm/mach-rockchip/Makefile b/arch/arm/mach-rockchip/Makefile index 5a4e383..abe03a8 100644 --- a/arch/arm/mach-rockchip/Makefile +++ b/arch/arm/mach-rockchip/Makefile @@ -10,4 +10,5 @@ else obj-y += board.o endif obj-y += common.o +obj-y += rk_timer.o obj-$(CONFIG_ROCKCHIP_RK3288) += rk3288/ diff --git a/arch/arm/mach-rockchip/board-spl.c b/arch/arm/mach-rockchip/board-spl.c index 28c3949..0426adf 100644 --- a/arch/arm/mach-rockchip/board-spl.c +++ b/arch/arm/mach-rockchip/board-spl.c @@ -18,6 +18,7 @@ #include <asm/arch/hardware.h> #include <asm/arch/periph.h> #include <asm/arch/sdram.h> +#include <asm/arch/timer.h> #include <dm/pinctrl.h> #include <dm/root.h> #include <dm/test.h> @@ -110,24 +111,6 @@ static void configure_l2ctlr(void) write_l2ctlr(l2ctlr); }
-struct rk3288_timer {
u32 timer_load_count0;u32 timer_load_count1;u32 timer_curr_value0;u32 timer_curr_value1;u32 timer_ctrl_reg;u32 timer_int_status;-};
-void init_timer(void) -{
struct rk3288_timer * const timer7_ptr = (void *)TIMER7_BASE;writel(0xffffffff, &timer7_ptr->timer_load_count0);writel(0xffffffff, &timer7_ptr->timer_load_count1);writel(1, &timer7_ptr->timer_ctrl_reg);-}
static int configure_emmc(struct udevice *pinctrl) { struct gpio_desc desc; @@ -197,7 +180,7 @@ void board_init_f(ulong dummy) hang(); }
init_timer();
rockchip_timer_init(); configure_l2ctlr(); ret = uclass_get_device(UCLASS_CLK, 0, &dev);diff --git a/arch/arm/mach-rockchip/rk_timer.c b/arch/arm/mach-rockchip/rk_timer.c new file mode 100644 index 0000000..ae693c0 --- /dev/null +++ b/arch/arm/mach-rockchip/rk_timer.c @@ -0,0 +1,48 @@ +/*
- (C) Copyright 2015 Rockchip Electronics Co., Ltd
- SPDX-License-Identifier: GPL-2.0+
- */
+#include <asm/arch/timer.h> +#include <asm/io.h> +#include <common.h> +#include <linux/types.h>
+struct rk_timer * const timer_ptr = (void *)CONFIG_SYS_TIMER_BASE;
+static uint64_t rockchip_get_ticks(void) +{
uint64_t timebase_h, timebase_l;timebase_l = readl(&timer_ptr->timer_curr_value0);timebase_h = readl(&timer_ptr->timer_curr_value1);return timebase_h << 32 | timebase_l;+}
+static unsigned int usec_to_tick(unsigned long usec)
should probably use 'uint64_t' for 'tick' and the return value, and use 'unsigned int' for 'usec'
+{
unsigned int tick = usec;tick *= CONFIG_SYS_TIMER_RATE / (1000 * 1000);return tick;+}
+void rockchip_udelay(unsigned int us)
nit: perhaps use 'usec' instead of 'us' for consistency with usec_to_tick
+{
uint64_t tmp;/* get current timestamp */
nit: the comment is kind of misleadning as 'tmp' isn't the current timestamp
tmp = rockchip_get_ticks() + usec_to_tick(us);/* loop till event */while (rockchip_get_ticks() < tmp+1);+}
+void rockchip_timer_init(void) +{
writel(0xffffffff, &timer_ptr->timer_load_count0);writel(0xffffffff, &timer_ptr->timer_load_count1);writel(1, &timer_ptr->timer_ctrl_reg);+} diff --git a/include/configs/rk3288_common.h b/include/configs/rk3288_common.h index 36408b9..cdea6cb 100644 --- a/include/configs/rk3288_common.h +++ b/include/configs/rk3288_common.h @@ -23,7 +23,8 @@ #define CONFIG_DISPLAY_BOARDINFO
#define CONFIG_SYS_TIMER_RATE (24 * 1000 * 1000) -#define CONFIG_SYS_TIMER_COUNTER (TIMER7_BASE + 8) +#define CONFIG_SYS_TIMER_BASE 0xff810020 /* TIMER7 */
nit: the code around it seems to use a space instead of a tab after #define
+#define CONFIG_SYS_TIMER_COUNTER (CONFIG_SYS_TIMER_BASE + 8)
#define CONFIG_SPL_FRAMEWORK
#define CONFIG_SPL_LIBCOMMON_SUPPORT
1.9.1