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 Changes in v6: - Adviced by Ben Chan: - use uint64_t as usec_to_tick() return type
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..1d044bb --- /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 { + unsigned int timer_load_count0; + 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 usec); + +#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..ae5123d --- /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 uint64_t usec_to_tick(unsigned int usec) +{ + uint64_t tick = usec; + tick *= CONFIG_SYS_TIMER_RATE / (1000 * 1000); + return tick; +} + +void rockchip_udelay(unsigned int usec) +{ + uint64_t tmp; + + /* get timestamp */ + tmp = rockchip_get_ticks() + usec_to_tick(usec); + + /* 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 */ +#define CONFIG_SYS_TIMER_COUNTER (CONFIG_SYS_TIMER_BASE + 8)
#define CONFIG_SPL_FRAMEWORK #define CONFIG_SPL_LIBCOMMON_SUPPORT