Co-developed-by: Nathan Barrett-Morrison nathan.morrison@timesys.com Signed-off-by: Nathan Barrett-Morrison nathan.morrison@timesys.com Co-developed-by: Angelo Dureghello angelo.dureghello@timesys.com Signed-off-by: Angelo Dureghello angelo.dureghello@timesys.com Co-developed-by: Ian Roberts ian.roberts@timesys.com Signed-off-by: Ian Roberts ian.roberts@timesys.com Signed-off-by: Greg Malysa greg.malysa@timesys.com
---
Changes in v2: - Added gptimer driver to this series because a minimal system can't boot without it
--- MAINTAINERS | 1 + drivers/timer/Kconfig | 8 ++ drivers/timer/Makefile | 1 + drivers/timer/adi_sc5xx_timer.c | 145 ++++++++++++++++++++++++++++++++ 4 files changed, 155 insertions(+) create mode 100644 drivers/timer/adi_sc5xx_timer.c
diff --git a/MAINTAINERS b/MAINTAINERS index 74310c8f9d..eddd4f2c23 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -611,6 +611,7 @@ F: arch/arm/include/asm/arch-adi/ F: arch/arm/mach-sc5xx/ F: drivers/clk/adi/ F: drivers/serial/serial_adi_uart4.c +F: drivers/timer/adi_sc5xx_timer.c F: include/env/adi/
ARM SNAPDRAGON diff --git a/drivers/timer/Kconfig b/drivers/timer/Kconfig index 60519c3b53..6b1de82ae3 100644 --- a/drivers/timer/Kconfig +++ b/drivers/timer/Kconfig @@ -50,6 +50,14 @@ config TIMER_EARLY use an early timer. These functions must be supported by your timer driver: timer_early_get_count() and timer_early_get_rate().
+config ADI_SC5XX_TIMER + bool "ADI ADSP-SC5xx Timer Support" + depends on TIMER && (SC57X || SC58X || SC59X || SC59X_64) + help + gptimer based timer support on ADI's ADSP-SC5xx platforms. Available + but not required on sc59x-64-based platforms (598 and similar). + Required on 32-bit platforms (sc57x, sc58x, sc594 and earlier). + config ALTERA_TIMER bool "Altera timer support" depends on TIMER diff --git a/drivers/timer/Makefile b/drivers/timer/Makefile index b93145e8d4..fb95c8899e 100644 --- a/drivers/timer/Makefile +++ b/drivers/timer/Makefile @@ -3,6 +3,7 @@ # Copyright (C) 2015 Thomas Chou thomas@wytron.com.tw
obj-y += timer-uclass.o +obj-$(CONFIG_ADI_SC5XX_TIMER) += adi_sc5xx_timer.o obj-$(CONFIG_ALTERA_TIMER) += altera_timer.o obj-$(CONFIG_$(SPL_)ANDES_PLMT_TIMER) += andes_plmt_timer.o obj-$(CONFIG_ARC_TIMER) += arc_timer.o diff --git a/drivers/timer/adi_sc5xx_timer.c b/drivers/timer/adi_sc5xx_timer.c new file mode 100644 index 0000000000..11c098434a --- /dev/null +++ b/drivers/timer/adi_sc5xx_timer.c @@ -0,0 +1,145 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * (C) Copyright 2022 - Analog Devices, Inc. + * + * Written and/or maintained by Timesys Corporation + * + * Converted to driver model by Nathan Barrett-Morrison + * + * Author: Greg Malysa greg.malysa@timesys.com + * Additional Contact: Nathan Barrett-Morrison nathan.morrison@timesys.com + * + * dm timer implementation for ADI ADSP-SC5xx SoCs + * + */ + +#include <clk.h> +#include <dm.h> +#include <timer.h> +#include <asm/io.h> +#include <dm/device_compat.h> +#include <linux/compiler_types.h> + +/* + * Timer Configuration Register Bits + */ +#define TIMER_OUT_DIS 0x0800 +#define TIMER_PULSE_HI 0x0080 +#define TIMER_MODE_PWM_CONT 0x000c + +#define __BFP(m) u16 m; u16 __pad_##m + +struct gptimer3 { + __BFP(config); + u32 counter; + u32 period; + u32 width; + u32 delay; +}; + +struct gptimer3_group_regs { + __BFP(run); + __BFP(enable); + __BFP(disable); + __BFP(stop_cfg); + __BFP(stop_cfg_set); + __BFP(stop_cfg_clr); + __BFP(data_imsk); + __BFP(stat_imsk); + __BFP(tr_msk); + __BFP(tr_ie); + __BFP(data_ilat); + __BFP(stat_ilat); + __BFP(err_status); + __BFP(bcast_per); + __BFP(bcast_wid); + __BFP(bcast_dly); +}; + +#define MAX_TIM_LOAD 0xFFFFFFFF + +struct adi_gptimer_priv { + struct gptimer3_group_regs __iomem *timer_group; + struct gptimer3 __iomem *timer_base; + u32 prev; + u64 upper; +}; + +static u64 adi_gptimer_get_count(struct udevice *udev) +{ + struct adi_gptimer_priv *priv = dev_get_priv(udev); + + u32 now = readl(&priv->timer_base->counter); + + if (now < priv->prev) + priv->upper += (1ull << 32); + + priv->prev = now; + + return (priv->upper + (u64)now); +} + +static const struct timer_ops adi_gptimer_ops = { + .get_count = adi_gptimer_get_count, +}; + +static int adi_gptimer_probe(struct udevice *udev) +{ + struct timer_dev_priv *uc_priv = dev_get_uclass_priv(udev); + struct adi_gptimer_priv *priv = dev_get_priv(udev); + struct clk clk; + u16 imask; + int ret; + + priv->timer_group = dev_remap_addr_index(udev, 0); + priv->timer_base = dev_remap_addr_index(udev, 1); + priv->upper = 0; + priv->prev = 0; + + if (!priv->timer_group || !priv->timer_base) { + dev_err(udev, "Missing timer_group or timer_base reg entries\n"); + return -ENODEV; + } + + ret = clk_get_by_index(udev, 0, &clk); + if (ret < 0) { + dev_err(udev, "Missing clock reference for timer\n"); + return ret; + } + + ret = clk_enable(&clk); + if (ret) { + dev_err(udev, "Failed to enable clock\n"); + return ret; + } + + uc_priv->clock_rate = clk_get_rate(&clk); + + /* Enable timer */ + writew(TIMER_OUT_DIS | TIMER_MODE_PWM_CONT | TIMER_PULSE_HI, + &priv->timer_base->config); + writel(MAX_TIM_LOAD, &priv->timer_base->period); + writel(MAX_TIM_LOAD - 1, &priv->timer_base->width); + + /* We only use timer 0 in uboot */ + imask = readw(&priv->timer_group->data_imsk); + imask &= ~(1 << 0); + writew(imask, &priv->timer_group->data_imsk); + writew((1 << 0), &priv->timer_group->enable); + + return 0; +} + +static const struct udevice_id adi_gptimer_ids[] = { + { .compatible = "adi,sc5xx-gptimer" }, + { }, +}; + +U_BOOT_DRIVER(adi_gptimer) = { + .name = "adi_gptimer", + .id = UCLASS_TIMER, + .of_match = adi_gptimer_ids, + .priv_auto = sizeof(struct adi_gptimer_priv), + .probe = adi_gptimer_probe, + .ops = &adi_gptimer_ops, +};