diff options
| -rw-r--r-- | arch/arm/include/asm/arch-aspeed/wdt_ast2600.h | 129 | ||||
| -rw-r--r-- | drivers/watchdog/Kconfig | 9 | ||||
| -rw-r--r-- | drivers/watchdog/Makefile | 1 | ||||
| -rw-r--r-- | drivers/watchdog/ast2600_wdt.c | 110 |
4 files changed, 249 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-aspeed/wdt_ast2600.h b/arch/arm/include/asm/arch-aspeed/wdt_ast2600.h new file mode 100644 index 0000000..96e8ca0 --- /dev/null +++ b/arch/arm/include/asm/arch-aspeed/wdt_ast2600.h @@ -0,0 +1,129 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (c) 2020 Aspeed Technology Inc. + */ + +#ifndef _ASM_ARCH_WDT_AST2600_H +#define _ASM_ARCH_WDT_AST2600_H + +#define WDT_BASE 0x1e785000 + +/* + * Special value that needs to be written to counter_restart register to + * (re)start the timer + */ +#define WDT_COUNTER_RESTART_VAL 0x4755 + +/* reset mode */ +#define WDT_RESET_MODE_SOC 0 +#define WDT_RESET_MODE_CHIP 1 +#define WDT_RESET_MODE_CPU 2 + +/* bit-fields of WDT control register */ +#define WDT_CTRL_2ND_BOOT BIT(7) +#define WDT_CTRL_RESET_MODE_MASK GENMASK(6, 5) +#define WDT_CTRL_RESET_MODE_SHIFT 5 +#define WDT_CTRL_CLK1MHZ BIT(4) +#define WDT_CTRL_RESET BIT(1) +#define WDT_CTRL_EN BIT(0) + +/* bit-fields of WDT reset mask1 register */ +#define WDT_RESET_MASK1_RVAS BIT(25) +#define WDT_RESET_MASK1_GPIO1 BIT(24) +#define WDT_RESET_MASK1_XDMA2 BIT(23) +#define WDT_RESET_MASK1_XDMA1 BIT(22) +#define WDT_RESET_MASK1_MCTP2 BIT(21) +#define WDT_RESET_MASK1_MCTP1 BIT(20) +#define WDT_RESET_MASK1_JTAG1 BIT(19) +#define WDT_RESET_MASK1_SD_SDIO1 BIT(18) +#define WDT_RESET_MASK1_MAC2 BIT(17) +#define WDT_RESET_MASK1_MAC1 BIT(16) +#define WDT_RESET_MASK1_GPMCU BIT(15) +#define WDT_RESET_MASK1_DPMCU BIT(14) +#define WDT_RESET_MASK1_DP BIT(13) +#define WDT_RESET_MASK1_HAC BIT(12) +#define WDT_RESET_MASK1_VIDEO BIT(11) +#define WDT_RESET_MASK1_CRT BIT(10) +#define WDT_RESET_MASK1_GCRT BIT(9) +#define WDT_RESET_MASK1_USB11_UHCI BIT(8) +#define WDT_RESET_MASK1_USB_PORTA BIT(7) +#define WDT_RESET_MASK1_USB_PORTB BIT(6) +#define WDT_RESET_MASK1_COPROC BIT(5) +#define WDT_RESET_MASK1_SOC BIT(4) +#define WDT_RESET_MASK1_SLI BIT(3) +#define WDT_RESET_MASK1_AHB BIT(2) +#define WDT_RESET_MASK1_SDRAM BIT(1) +#define WDT_RESET_MASK1_ARM BIT(0) + +/* bit-fields of WDT reset mask2 register */ +#define WDT_RESET_MASK2_ESPI BIT(26) +#define WDT_RESET_MASK2_I3C_BUS8 BIT(25) +#define WDT_RESET_MASK2_I3C_BUS7 BIT(24) +#define WDT_RESET_MASK2_I3C_BUS6 BIT(23) +#define WDT_RESET_MASK2_I3C_BUS5 BIT(22) +#define WDT_RESET_MASK2_I3C_BUS4 BIT(21) +#define WDT_RESET_MASK2_I3C_BUS3 BIT(20) +#define WDT_RESET_MASK2_I3C_BUS2 BIT(19) +#define WDT_RESET_MASK2_I3C_BUS1 BIT(18) +#define WDT_RESET_MASK2_I3C_GLOBAL BIT(17) +#define WDT_RESET_MASK2_I2C BIT(16) +#define WDT_RESET_MASK2_FSI BIT(15) +#define WDT_RESET_MASK2_ADC BIT(14) +#define WDT_RESET_MASK2_PWM BIT(13) +#define WDT_RESET_MASK2_PECI BIT(12) +#define WDT_RESET_MASK2_LPC BIT(11) +#define WDT_RESET_MASK2_MDC_MDIO BIT(10) +#define WDT_RESET_MASK2_GPIO2 BIT(9) +#define WDT_RESET_MASK2_JTAG2 BIT(8) +#define WDT_RESET_MASK2_SD_SDIO2 BIT(7) +#define WDT_RESET_MASK2_MAC4 BIT(6) +#define WDT_RESET_MASK2_MAC3 BIT(5) +#define WDT_RESET_MASK2_SOC BIT(4) +#define WDT_RESET_MASK2_SLI2 BIT(3) +#define WDT_RESET_MASK2_AHB2 BIT(2) +#define WDT_RESET_MASK2_SPI1_SPI2 BIT(1) +#define WDT_RESET_MASK2_ARM BIT(0) + +#define WDT_RESET_MASK1_DEFAULT \ + (WDT_RESET_MASK1_RVAS | WDT_RESET_MASK1_GPIO1 | \ + WDT_RESET_MASK1_JTAG1 | WDT_RESET_MASK1_SD_SDIO1 | \ + WDT_RESET_MASK1_MAC2 | WDT_RESET_MASK1_MAC1 | \ + WDT_RESET_MASK1_HAC | WDT_RESET_MASK1_VIDEO | \ + WDT_RESET_MASK1_CRT | WDT_RESET_MASK1_GCRT | \ + WDT_RESET_MASK1_USB11_UHCI | WDT_RESET_MASK1_USB_PORTA | \ + WDT_RESET_MASK1_USB_PORTB | WDT_RESET_MASK1_COPROC | \ + WDT_RESET_MASK1_SOC | WDT_RESET_MASK1_ARM) + +#define WDT_RESET_MASK2_DEFAULT \ + (WDT_RESET_MASK2_I3C_BUS8 | WDT_RESET_MASK2_I3C_BUS7 | \ + WDT_RESET_MASK2_I3C_BUS6 | WDT_RESET_MASK2_I3C_BUS5 | \ + WDT_RESET_MASK2_I3C_BUS4 | WDT_RESET_MASK2_I3C_BUS3 | \ + WDT_RESET_MASK2_I3C_BUS2 | WDT_RESET_MASK2_I3C_BUS1 | \ + WDT_RESET_MASK2_I3C_GLOBAL | WDT_RESET_MASK2_I2C | \ + WDT_RESET_MASK2_FSI | WDT_RESET_MASK2_ADC | \ + WDT_RESET_MASK2_PWM | WDT_RESET_MASK2_PECI | \ + WDT_RESET_MASK2_LPC | WDT_RESET_MASK2_MDC_MDIO | \ + WDT_RESET_MASK2_GPIO2 | WDT_RESET_MASK2_JTAG2 | \ + WDT_RESET_MASK2_SD_SDIO2 | WDT_RESET_MASK2_MAC4 | \ + WDT_RESET_MASK2_MAC3 | WDT_RESET_MASK2_SOC | \ + WDT_RESET_MASK2_ARM) + +#ifndef __ASSEMBLY__ +struct ast2600_wdt { + u32 counter_status; + u32 counter_reload_val; + u32 counter_restart; + u32 ctrl; + u32 timeout_status; + u32 clr_timeout_status; + u32 reset_width; + u32 reset_mask1; + u32 reset_mask2; + u32 sw_reset_ctrl; + u32 sw_reset_mask1; + u32 sw_reset_mask2; + u32 sw_reset_disable; +}; +#endif /* __ASSEMBLY__ */ + +#endif /* _ASM_ARCH_WDT_AST2600_H */ diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig index 4532a40..d5edabf 100644 --- a/drivers/watchdog/Kconfig +++ b/drivers/watchdog/Kconfig @@ -86,6 +86,15 @@ config WDT_ASPEED It currently does not support Boot Flash Addressing Mode Detection or Second Boot. +config WDT_AST2600 + bool "Aspeed AST2600 watchdog timer support" + depends on WDT + default y if ASPEED_AST2600 + help + Select this to enable watchdog timer for Aspeed ast2500/ast2400 devices. + The watchdog timer is stopped when initialized. It performs reset, either + full SoC reset or CPU or just some peripherals, based on the flags. + config WDT_AT91 bool "AT91 watchdog timer support" depends on WDT diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile index 01b8231..cbb6d84 100644 --- a/drivers/watchdog/Makefile +++ b/drivers/watchdog/Makefile @@ -19,6 +19,7 @@ obj-$(CONFIG_$(SPL_TPL_)WDT) += wdt-uclass.o obj-$(CONFIG_WDT_SANDBOX) += sandbox_wdt.o obj-$(CONFIG_WDT_ARMADA_37XX) += armada-37xx-wdt.o obj-$(CONFIG_WDT_ASPEED) += ast_wdt.o +obj-$(CONFIG_WDT_AST2600) += ast2600_wdt.o obj-$(CONFIG_WDT_BCM6345) += bcm6345_wdt.o obj-$(CONFIG_WDT_CORTINA) += cortina_wdt.o obj-$(CONFIG_WDT_ORION) += orion_wdt.o diff --git a/drivers/watchdog/ast2600_wdt.c b/drivers/watchdog/ast2600_wdt.c new file mode 100644 index 0000000..bc98420 --- /dev/null +++ b/drivers/watchdog/ast2600_wdt.c @@ -0,0 +1,110 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (c) 2020 Aspeed Technology, Inc + */ + +#include <common.h> +#include <dm.h> +#include <errno.h> +#include <log.h> +#include <wdt.h> +#include <asm/io.h> +#include <asm/arch/wdt_ast2600.h> +#include <linux/err.h> + +struct ast2600_wdt_priv { + struct ast2600_wdt *regs; +}; + +static int ast2600_wdt_start(struct udevice *dev, u64 timeout_ms, ulong flags) +{ + struct ast2600_wdt_priv *priv = dev_get_priv(dev); + struct ast2600_wdt *wdt = priv->regs; + + /* WDT counts in the 1MHz frequency, namely 1us */ + writel((u32)(timeout_ms * 1000), &wdt->counter_reload_val); + writel(WDT_COUNTER_RESTART_VAL, &wdt->counter_restart); + writel(WDT_CTRL_EN | WDT_CTRL_RESET, &wdt->ctrl); + + return 0; +} + +static int ast2600_wdt_stop(struct udevice *dev) +{ + struct ast2600_wdt_priv *priv = dev_get_priv(dev); + struct ast2600_wdt *wdt = priv->regs; + + clrbits_le32(&wdt->ctrl, WDT_CTRL_EN); + + writel(WDT_RESET_MASK1_DEFAULT, &wdt->reset_mask1); + writel(WDT_RESET_MASK2_DEFAULT, &wdt->reset_mask2); + + return 0; +} + +static int ast2600_wdt_reset(struct udevice *dev) +{ + struct ast2600_wdt_priv *priv = dev_get_priv(dev); + struct ast2600_wdt *wdt = priv->regs; + + writel(WDT_COUNTER_RESTART_VAL, &wdt->counter_restart); + + return 0; +} + +static int ast2600_wdt_expire_now(struct udevice *dev, ulong flags) +{ + int ret; + struct ast2600_wdt_priv *priv = dev_get_priv(dev); + struct ast2600_wdt *wdt = priv->regs; + + ret = ast2600_wdt_start(dev, 1, flags); + if (ret) + return ret; + + while (readl(&wdt->ctrl) & WDT_CTRL_EN) + ; + + return ast2600_wdt_stop(dev); +} + +static int ast2600_wdt_of_to_plat(struct udevice *dev) +{ + struct ast2600_wdt_priv *priv = dev_get_priv(dev); + + priv->regs = dev_read_addr_ptr(dev); + if (!priv->regs) + return -EINVAL; + + return 0; +} + +static const struct wdt_ops ast2600_wdt_ops = { + .start = ast2600_wdt_start, + .reset = ast2600_wdt_reset, + .stop = ast2600_wdt_stop, + .expire_now = ast2600_wdt_expire_now, +}; + +static const struct udevice_id ast2600_wdt_ids[] = { + { .compatible = "aspeed,ast2600-wdt" }, + { } +}; + +static int ast2600_wdt_probe(struct udevice *dev) +{ + debug("%s() wdt%u\n", __func__, dev_seq(dev)); + ast2600_wdt_stop(dev); + + return 0; +} + +U_BOOT_DRIVER(ast2600_wdt) = { + .name = "ast2600_wdt", + .id = UCLASS_WDT, + .of_match = ast2600_wdt_ids, + .probe = ast2600_wdt_probe, + .priv_auto = sizeof(struct ast2600_wdt_priv), + .of_to_plat = ast2600_wdt_of_to_plat, + .ops = &ast2600_wdt_ops, +}; |