diff options
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/Kconfig | 7 | ||||
| -rw-r--r-- | arch/arm/Makefile | 1 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-aspeed/timer.h | 54 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-aspeed/wdt.h | 99 | ||||
| -rw-r--r-- | arch/arm/mach-aspeed/Kconfig | 27 | ||||
| -rw-r--r-- | arch/arm/mach-aspeed/Makefile | 7 | ||||
| -rw-r--r-- | arch/arm/mach-aspeed/ast_wdt.c | 59 |
7 files changed, 254 insertions, 0 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index c04adfb..b0b6f78 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1007,8 +1007,15 @@ config TARGET_THUNDERX_88XX select OF_CONTROL select SYS_CACHE_SHIFT_7 +config ARCH_ASPEED + bool "Support Aspeed SoCs" + select OF_CONTROL + select DM + endchoice +source "arch/arm/mach-aspeed/Kconfig" + source "arch/arm/mach-at91/Kconfig" source "arch/arm/mach-bcm283x/Kconfig" diff --git a/arch/arm/Makefile b/arch/arm/Makefile index 4b8bf80..6fa9506 100644 --- a/arch/arm/Makefile +++ b/arch/arm/Makefile @@ -50,6 +50,7 @@ PLATFORM_CPPFLAGS += $(arch-y) $(tune-y) # Machine directory name. This list is sorted alphanumerically # by CONFIG_* macro name. +machine-$(CONFIG_ARCH_ASPEED) += aspeed machine-$(CONFIG_ARCH_AT91) += at91 machine-$(CONFIG_ARCH_BCM283X) += bcm283x machine-$(CONFIG_ARCH_DAVINCI) += davinci diff --git a/arch/arm/include/asm/arch-aspeed/timer.h b/arch/arm/include/asm/arch-aspeed/timer.h new file mode 100644 index 0000000..87c5b35 --- /dev/null +++ b/arch/arm/include/asm/arch-aspeed/timer.h @@ -0,0 +1,54 @@ +/* + * Copyright (c) 2016 Google, Inc + * + * SPDX-License-Identifier: GPL-2.0+ + */ +#ifndef _ASM_ARCH_TIMER_H +#define _ASM_ARCH_TIMER_H + +/* Each timer has 4 control bits in ctrl1 register. + * Timer1 uses bits 0:3, Timer2 uses bits 4:7 and so on, + * such that timer X uses bits (4 * X - 4):(4 * X - 1) + * If the timer does not support PWM, bit 4 is reserved. + */ +#define AST_TMC_EN (1 << 0) +#define AST_TMC_1MHZ (1 << 1) +#define AST_TMC_OVFINTR (1 << 2) +#define AST_TMC_PWM (1 << 3) + +/* Timers are counted from 1 in the datasheet. */ +#define AST_TMC_CTRL1_SHIFT(n) (4 * ((n) - 1)) + +#define AST_TMC_RATE (1000*1000) + +#ifndef __ASSEMBLY__ + +/* + * All timers share control registers, which makes it harder to make them + * separate devices. Since only one timer is needed at the moment, making + * it this just one device. + */ + +struct ast_timer_counter { + u32 status; + u32 reload_val; + u32 match1; + u32 match2; +}; + +struct ast_timer { + struct ast_timer_counter timers1[3]; + u32 ctrl1; + u32 ctrl2; +#ifdef CONFIG_ASPEED_AST2500 + u32 ctrl3; + u32 ctrl1_clr; +#else + u32 reserved[2]; +#endif + struct ast_timer_counter timers2[5]; +}; + +#endif /* __ASSEMBLY__ */ + +#endif /* _ASM_ARCH_TIMER_H */ diff --git a/arch/arm/include/asm/arch-aspeed/wdt.h b/arch/arm/include/asm/arch-aspeed/wdt.h new file mode 100644 index 0000000..b292a0e --- /dev/null +++ b/arch/arm/include/asm/arch-aspeed/wdt.h @@ -0,0 +1,99 @@ +/* + * (C) Copyright 2016 Google, Inc + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef _ASM_ARCH_WDT_H +#define _ASM_ARCH_WDT_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 + +/* Control register */ +#define WDT_CTRL_RESET_MODE_SHIFT 5 +#define WDT_CTRL_RESET_MODE_MASK 3 + +#define WDT_CTRL_EN (1 << 0) +#define WDT_CTRL_RESET (1 << 1) +#define WDT_CTRL_CLK1MHZ (1 << 4) +#define WDT_CTRL_2ND_BOOT (1 << 7) + +/* Values for Reset Mode */ +#define WDT_CTRL_RESET_SOC 0 +#define WDT_CTRL_RESET_CHIP 1 +#define WDT_CTRL_RESET_CPU 2 +#define WDT_CTRL_RESET_MASK 3 + +/* Reset Mask register */ +#define WDT_RESET_ARM (1 << 0) +#define WDT_RESET_COPROC (1 << 1) +#define WDT_RESET_SDRAM (1 << 2) +#define WDT_RESET_AHB (1 << 3) +#define WDT_RESET_I2C (1 << 4) +#define WDT_RESET_MAC1 (1 << 5) +#define WDT_RESET_MAC2 (1 << 6) +#define WDT_RESET_GCRT (1 << 7) +#define WDT_RESET_USB20 (1 << 8) +#define WDT_RESET_USB11_HOST (1 << 9) +#define WDT_RESET_USB11_EHCI2 (1 << 10) +#define WDT_RESET_VIDEO (1 << 11) +#define WDT_RESET_HAC (1 << 12) +#define WDT_RESET_LPC (1 << 13) +#define WDT_RESET_SDSDIO (1 << 14) +#define WDT_RESET_MIC (1 << 15) +#define WDT_RESET_CRT2C (1 << 16) +#define WDT_RESET_PWM (1 << 17) +#define WDT_RESET_PECI (1 << 18) +#define WDT_RESET_JTAG (1 << 19) +#define WDT_RESET_ADC (1 << 20) +#define WDT_RESET_GPIO (1 << 21) +#define WDT_RESET_MCTP (1 << 22) +#define WDT_RESET_XDMA (1 << 23) +#define WDT_RESET_SPI (1 << 24) +#define WDT_RESET_MISC (1 << 25) + +#ifndef __ASSEMBLY__ +struct ast_wdt { + u32 counter_status; + u32 counter_reload_val; + u32 counter_restart; + u32 ctrl; + u32 timeout_status; + u32 clr_timeout_status; + u32 reset_width; +#ifdef CONFIG_ASPEED_AST2500 + u32 reset_mask; +#else + u32 reserved0; +#endif +}; + +void wdt_stop(struct ast_wdt *wdt); +void wdt_start(struct ast_wdt *wdt, u32 timeout); + +/** + * Reset peripherals specified by mask + * + * Note, that this is only supported by ast2500 SoC + * + * @wdt: watchdog to use for this reset + * @mask: reset mask. + */ +int ast_wdt_reset_masked(struct ast_wdt *wdt, u32 mask); + +/** + * ast_get_wdt() - get a pointer to watchdog registers + * + * @wdt_number: 0-based WDT peripheral number + * @return pointer to registers or -ve error on error + */ +struct ast_wdt *ast_get_wdt(u8 wdt_number); +#endif /* __ASSEMBLY__ */ + +#endif /* _ASM_ARCH_WDT_H */ diff --git a/arch/arm/mach-aspeed/Kconfig b/arch/arm/mach-aspeed/Kconfig new file mode 100644 index 0000000..b72ed89 --- /dev/null +++ b/arch/arm/mach-aspeed/Kconfig @@ -0,0 +1,27 @@ +if ARCH_ASPEED + +config SYS_ARCH + default "arm" + +config SYS_SOC + default "aspeed" + +config SYS_TEXT_BASE + default 0x00000000 + +config ASPEED_AST2500 + bool "Support Aspeed AST2500 SoC" + select CPU_ARM1176 + help + The Aspeed AST2500 is a ARM-based SoC with arm1176 CPU. + It is used as Board Management Controller on many server boards, + which is enabled by support of LPC and eSPI peripherals. + +config WDT_NUM + int "Number of Watchdog Timers" + default 3 if ASPEED_AST2500 + help + The number of Watchdot Timers on a SoC. + AST2500 has three WDTsk earlier versions have two or fewer. + +endif diff --git a/arch/arm/mach-aspeed/Makefile b/arch/arm/mach-aspeed/Makefile new file mode 100644 index 0000000..a14b8f7 --- /dev/null +++ b/arch/arm/mach-aspeed/Makefile @@ -0,0 +1,7 @@ +# +# Copyright (c) 2016 Google, Inc +# +# SPDX-License-Identifier: GPL-2.0+ +# + +obj-$(CONFIG_ARCH_ASPEED) += ast_wdt.o diff --git a/arch/arm/mach-aspeed/ast_wdt.c b/arch/arm/mach-aspeed/ast_wdt.c new file mode 100644 index 0000000..22481ab --- /dev/null +++ b/arch/arm/mach-aspeed/ast_wdt.c @@ -0,0 +1,59 @@ +/* + * (C) Copyright 2016 Google, Inc + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/wdt.h> +#include <linux/err.h> + +void wdt_stop(struct ast_wdt *wdt) +{ + clrbits_le32(&wdt->ctrl, WDT_CTRL_EN); +} + +void wdt_start(struct ast_wdt *wdt, u32 timeout) +{ + writel(timeout, &wdt->counter_reload_val); + writel(WDT_COUNTER_RESTART_VAL, &wdt->counter_restart); + /* + * Setting CLK1MHZ bit is just for compatibility with ast2400 part. + * On ast2500 watchdog timer clock is fixed at 1MHz and the bit is + * read-only + */ + setbits_le32(&wdt->ctrl, + WDT_CTRL_EN | WDT_CTRL_RESET | WDT_CTRL_CLK1MHZ); +} + +struct ast_wdt *ast_get_wdt(u8 wdt_number) +{ + if (wdt_number > CONFIG_WDT_NUM - 1) + return ERR_PTR(-EINVAL); + + return (struct ast_wdt *)(WDT_BASE + + sizeof(struct ast_wdt) * wdt_number); +} + +int ast_wdt_reset_masked(struct ast_wdt *wdt, u32 mask) +{ +#ifdef CONFIG_ASPEED_AST2500 + if (!mask) + return -EINVAL; + + writel(mask, &wdt->reset_mask); + clrbits_le32(&wdt->ctrl, + WDT_CTRL_RESET_MASK << WDT_CTRL_RESET_MODE_SHIFT); + wdt_start(wdt, 1); + + /* Wait for WDT to reset */ + while (readl(&wdt->ctrl) & WDT_CTRL_EN) + ; + wdt_stop(wdt); + + return 0; +#else + return -EINVAL; +#endif +} |