diff options
Diffstat (limited to 'arch/arm/include/asm/arch-aspeed/wdt.h')
| -rw-r--r-- | arch/arm/include/asm/arch-aspeed/wdt.h | 113 |
1 files changed, 113 insertions, 0 deletions
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..fb04d41 --- /dev/null +++ b/arch/arm/include/asm/arch-aspeed/wdt.h @@ -0,0 +1,113 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * (C) Copyright 2016 Google, Inc + */ + +#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) + +#define WDT_RESET_DEFAULT \ + (WDT_RESET_ARM | WDT_RESET_COPROC | WDT_RESET_I2C | \ + WDT_RESET_MAC1 | WDT_RESET_MAC2 | WDT_RESET_GCRT | \ + WDT_RESET_USB20 | WDT_RESET_USB11_HOST | WDT_RESET_USB11_EHCI2 | \ + WDT_RESET_VIDEO | WDT_RESET_HAC | WDT_RESET_LPC | \ + WDT_RESET_SDSDIO | WDT_RESET_MIC | WDT_RESET_CRT2C | \ + WDT_RESET_PWM | WDT_RESET_PECI | WDT_RESET_JTAG | \ + WDT_RESET_ADC | WDT_RESET_GPIO | WDT_RESET_MISC) + +#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; + /* On pre-ast2500 SoCs this register is reserved. */ + u32 reset_mask; +}; + +/** + * Given flags parameter passed to wdt_reset or wdt_start uclass functions, + * gets Reset Mode value from it. + * + * @flags: flags parameter passed into wdt_reset or wdt_start + * @return Reset Mode value + */ +u32 ast_reset_mode_from_flags(ulong flags); + +/** + * Given flags parameter passed to wdt_reset or wdt_start uclass functions, + * gets Reset Mask value from it. Reset Mask is only supported on ast2500 + * + * @flags: flags parameter passed into wdt_reset or wdt_start + * @return Reset Mask value + */ +u32 ast_reset_mask_from_flags(ulong flags); + +/** + * Given Reset Mask and Reset Mode values, converts them to flags, + * suitable for passing into wdt_start or wdt_reset uclass functions. + * + * On ast2500 Reset Mask is 25 bits wide and Reset Mode is 2 bits wide, so they + * can both be packed into single 32 bits wide value. + * + * @reset_mode: Reset Mode + * @reset_mask: Reset Mask + */ +ulong ast_flags_from_reset_mode_mask(u32 reset_mode, u32 reset_mask); +#endif /* __ASSEMBLY__ */ + +#endif /* _ASM_ARCH_WDT_H */ |