diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index d6c5658ee8..3649222470 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1259,6 +1259,7 @@ config ARCH_VF610 config ARCH_ZYNQ bool "Xilinx Zynq based platform" + select ARM_TWD_TIMER select CLK select CLK_ZYNQ select CPU_V7A @@ -1278,7 +1279,9 @@ config ARCH_ZYNQ select SPL_DM_SPI_FLASH if SPL select SPL_OF_CONTROL if SPL select SPL_SEPARATE_BSS if SPL + select SPL_TIMER if SPL select SUPPORT_SPL + select TIMER imply ARCH_EARLY_INIT_R imply BOARD_LATE_INIT imply CMD_CLK diff --git a/arch/arm/dts/zynq-7000.dtsi b/arch/arm/dts/zynq-7000.dtsi index 37155df0fd..a7ca00fb76 100644 --- a/arch/arm/dts/zynq-7000.dtsi +++ b/arch/arm/dts/zynq-7000.dtsi @@ -416,6 +416,7 @@ }; scutimer: timer@f8f00600 { + u-boot,dm-pre-reloc; interrupt-parent = <&intc>; interrupts = <1 13 0x301>; compatible = "arm,cortex-a9-twd-timer"; diff --git a/arch/arm/mach-zynq/Makefile b/arch/arm/mach-zynq/Makefile index 8737f434d9..d9b2b999e1 100644 --- a/arch/arm/mach-zynq/Makefile +++ b/arch/arm/mach-zynq/Makefile @@ -6,7 +6,6 @@ # (C) Copyright 2008 # Guennadi Liakhovetki, DENX Software Engineering, -obj-y := timer.o obj-y += cpu.o obj-y += ddrc.o obj-y += slcr.o diff --git a/arch/arm/mach-zynq/clk.c b/arch/arm/mach-zynq/clk.c index 27f6bf2183..1945f60e08 100644 --- a/arch/arm/mach-zynq/clk.c +++ b/arch/arm/mach-zynq/clk.c @@ -52,10 +52,12 @@ int set_cpu_clk_info(void) return ret; rate = clk_get_rate(&clk) / 1000000; - if (i) + if (i) { gd->bd->bi_ddr_freq = rate; - else + } else { gd->bd->bi_arm_freq = rate; + gd->cpu_clk = clk_get_rate(&clk); + } clk_free(&clk); } diff --git a/arch/arm/mach-zynq/timer.c b/arch/arm/mach-zynq/timer.c deleted file mode 100644 index a51822a530..0000000000 --- a/arch/arm/mach-zynq/timer.c +++ /dev/null @@ -1,113 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * Copyright (C) 2017 Weidmüller Interface GmbH & Co. KG - * Stefan Herbrechtsmeier - * - * Copyright (C) 2012 Michal Simek - * Copyright (C) 2011-2017 Xilinx, Inc. All rights reserved. - * - * (C) Copyright 2008 - * Guennadi Liakhovetki, DENX Software Engineering, - * - * (C) Copyright 2004 - * Philippe Robin, ARM Ltd. - * - * (C) Copyright 2002-2004 - * Gary Jennejohn, DENX Software Engineering, - * - * (C) Copyright 2003 - * Texas Instruments - * - * (C) Copyright 2002 - * Sysgo Real-Time Solutions, GmbH - * Marius Groeger - * - * (C) Copyright 2002 - * Sysgo Real-Time Solutions, GmbH - * Alex Zuepke - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -DECLARE_GLOBAL_DATA_PTR; - -struct scu_timer { - u32 load; /* Timer Load Register */ - u32 counter; /* Timer Counter Register */ - u32 control; /* Timer Control Register */ -}; - -static struct scu_timer *timer_base = - (struct scu_timer *)ZYNQ_SCUTIMER_BASEADDR; - -#define SCUTIMER_CONTROL_PRESCALER_MASK 0x0000FF00 /* Prescaler */ -#define SCUTIMER_CONTROL_PRESCALER_SHIFT 8 -#define SCUTIMER_CONTROL_AUTO_RELOAD_MASK 0x00000002 /* Auto-reload */ -#define SCUTIMER_CONTROL_ENABLE_MASK 0x00000001 /* Timer enable */ - -#define TIMER_LOAD_VAL 0xFFFFFFFF -#define TIMER_PRESCALE 255 - -int timer_init(void) -{ - const u32 emask = SCUTIMER_CONTROL_AUTO_RELOAD_MASK | - (TIMER_PRESCALE << SCUTIMER_CONTROL_PRESCALER_SHIFT) | - SCUTIMER_CONTROL_ENABLE_MASK; - - struct udevice *dev; - struct clk clk; - int ret; - - ret = uclass_get_device_by_driver(UCLASS_CLK, - DM_DRIVER_GET(zynq_clk), &dev); - if (ret) - return ret; - - clk.id = cpu_6or4x_clk; - ret = clk_request(dev, &clk); - if (ret < 0) - return ret; - - gd->cpu_clk = clk_get_rate(&clk); - - clk_free(&clk); - - gd->arch.timer_rate_hz = (gd->cpu_clk / 2) / (TIMER_PRESCALE + 1); - - /* Load the timer counter register */ - writel(0xFFFFFFFF, &timer_base->load); - - /* - * Start the A9Timer device - * Enable Auto reload mode, Clear prescaler control bits - * Set prescaler value, Enable the decrementer - */ - clrsetbits_le32(&timer_base->control, SCUTIMER_CONTROL_PRESCALER_MASK, - emask); - - /* Reset time */ - gd->arch.lastinc = readl(&timer_base->counter) / - (gd->arch.timer_rate_hz / CONFIG_SYS_HZ); - gd->arch.tbl = 0; - - return 0; -} - -/* - * 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) -{ - return gd->arch.timer_rate_hz; -} diff --git a/drivers/timer/Kconfig b/drivers/timer/Kconfig index 4049290148..1b49236039 100644 --- a/drivers/timer/Kconfig +++ b/drivers/timer/Kconfig @@ -73,6 +73,12 @@ config ARC_TIMER usually at least one of them exists. Either of them is supported in U-Boot. +config ARM_TWD_TIMER + bool "ARM timer watchdog (TWD) timer support" + depends on TIMER && CLK + help + Select this to enable support for the ARM global timer watchdog timer. + config AST_TIMER bool "Aspeed ast2400/ast2500 timer support" depends on TIMER diff --git a/drivers/timer/Makefile b/drivers/timer/Makefile index 560e2d27e1..7bfb7749e9 100644 --- a/drivers/timer/Makefile +++ b/drivers/timer/Makefile @@ -6,6 +6,7 @@ obj-y += timer-uclass.o obj-$(CONFIG_ALTERA_TIMER) += altera_timer.o obj-$(CONFIG_ANDES_PLMT_TIMER) += andes_plmt_timer.o obj-$(CONFIG_ARC_TIMER) += arc_timer.o +obj-$(CONFIG_ARM_TWD_TIMER) += arm_twd_timer.o obj-$(CONFIG_AST_TIMER) += ast_timer.o obj-$(CONFIG_ATCPIT100_TIMER) += atcpit100_timer.o obj-$(CONFIG_$(SPL_)ATMEL_PIT_TIMER) += atmel_pit_timer.o diff --git a/drivers/timer/arm_twd_timer.c b/drivers/timer/arm_twd_timer.c new file mode 100644 index 0000000000..40ccd16587 --- /dev/null +++ b/drivers/timer/arm_twd_timer.c @@ -0,0 +1,108 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2017-2022 Weidmüller Interface GmbH & Co. KG + * Stefan Herbrechtsmeier + * + * Copyright (C) 2012 Michal Simek + * Copyright (C) 2011-2017 Xilinx, Inc. All rights reserved. + * + * (C) Copyright 2008 + * Guennadi Liakhovetki, DENX Software Engineering, + * + * (C) Copyright 2004 + * Philippe Robin, ARM Ltd. + * + * (C) Copyright 2002-2004 + * Gary Jennejohn, DENX Software Engineering, + * + * (C) Copyright 2003 + * Texas Instruments + * + * (C) Copyright 2002 + * Sysgo Real-Time Solutions, GmbH + * Marius Groeger + * + * (C) Copyright 2002 + * Sysgo Real-Time Solutions, GmbH + * Alex Zuepke + */ + +#include +#include +#include +#include +#include + +#include + +#define SCUTIMER_CONTROL_PRESCALER_MASK 0x0000FF00 /* Prescaler */ +#define SCUTIMER_CONTROL_AUTO_RELOAD_MASK 0x00000002 /* Auto-reload */ +#define SCUTIMER_CONTROL_ENABLE_MASK 0x00000001 /* Timer enable */ + +#define TIMER_LOAD_VAL 0xFFFFFFFF + +struct arm_twd_timer_regs { + u32 load; /* Timer Load Register */ + u32 counter; /* Timer Counter Register */ + u32 control; /* Timer Control Register */ +}; + +struct arm_twd_timer_priv { + struct arm_twd_timer_regs *base; +}; + +static u64 arm_twd_timer_get_count(struct udevice *dev) +{ + struct arm_twd_timer_priv *priv = dev_get_priv(dev); + struct arm_twd_timer_regs *regs = priv->base; + u32 count = TIMER_LOAD_VAL - readl(®s->counter); + + return timer_conv_64(count); +} + +static int arm_twd_timer_probe(struct udevice *dev) +{ + struct arm_twd_timer_priv *priv = dev_get_priv(dev); + struct arm_twd_timer_regs *regs; + fdt_addr_t addr; + + addr = dev_read_addr(dev); + if (addr == FDT_ADDR_T_NONE) + return -EINVAL; + + priv->base = (struct arm_twd_timer_regs *)addr; + + regs = priv->base; + + /* Load the timer counter register */ + writel(0xFFFFFFFF, ®s->load); + + /* + * Start the A9Timer device + * Enable Auto reload mode, Clear prescaler control bits + * Set prescaler value, Enable the decrementer + */ + clrsetbits_le32(®s->control, SCUTIMER_CONTROL_PRESCALER_MASK, + SCUTIMER_CONTROL_AUTO_RELOAD_MASK | + SCUTIMER_CONTROL_ENABLE_MASK); + + return 0; +} + +static const struct timer_ops arm_twd_timer_ops = { + .get_count = arm_twd_timer_get_count, +}; + +static const struct udevice_id arm_twd_timer_ids[] = { + { .compatible = "arm,cortex-a9-twd-timer" }, + {} +}; + +U_BOOT_DRIVER(arm_twd_timer) = { + .name = "arm_twd_timer", + .id = UCLASS_TIMER, + .of_match = arm_twd_timer_ids, + .priv_auto = sizeof(struct arm_twd_timer_priv), + .probe = arm_twd_timer_probe, + .ops = &arm_twd_timer_ops, +};