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185f812c41
Sphinx expects Return: and not @return to indicate a return value.
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Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
113 lines
3.3 KiB
C
113 lines
3.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* (C) Copyright 2016 Google, Inc
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*/
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#ifndef _ASM_ARCH_WDT_H
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#define _ASM_ARCH_WDT_H
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#define WDT_BASE 0x1e785000
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/*
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* Special value that needs to be written to counter_restart register to
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* (re)start the timer
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*/
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#define WDT_COUNTER_RESTART_VAL 0x4755
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/* Control register */
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#define WDT_CTRL_RESET_MODE_SHIFT 5
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#define WDT_CTRL_RESET_MODE_MASK 3
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#define WDT_CTRL_EN (1 << 0)
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#define WDT_CTRL_RESET (1 << 1)
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#define WDT_CTRL_CLK1MHZ (1 << 4)
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#define WDT_CTRL_2ND_BOOT (1 << 7)
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/* Values for Reset Mode */
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#define WDT_CTRL_RESET_SOC 0
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#define WDT_CTRL_RESET_CHIP 1
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#define WDT_CTRL_RESET_CPU 2
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#define WDT_CTRL_RESET_MASK 3
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/* Reset Mask register */
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#define WDT_RESET_ARM (1 << 0)
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#define WDT_RESET_COPROC (1 << 1)
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#define WDT_RESET_SDRAM (1 << 2)
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#define WDT_RESET_AHB (1 << 3)
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#define WDT_RESET_I2C (1 << 4)
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#define WDT_RESET_MAC1 (1 << 5)
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#define WDT_RESET_MAC2 (1 << 6)
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#define WDT_RESET_GCRT (1 << 7)
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#define WDT_RESET_USB20 (1 << 8)
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#define WDT_RESET_USB11_HOST (1 << 9)
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#define WDT_RESET_USB11_EHCI2 (1 << 10)
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#define WDT_RESET_VIDEO (1 << 11)
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#define WDT_RESET_HAC (1 << 12)
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#define WDT_RESET_LPC (1 << 13)
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#define WDT_RESET_SDSDIO (1 << 14)
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#define WDT_RESET_MIC (1 << 15)
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#define WDT_RESET_CRT2C (1 << 16)
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#define WDT_RESET_PWM (1 << 17)
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#define WDT_RESET_PECI (1 << 18)
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#define WDT_RESET_JTAG (1 << 19)
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#define WDT_RESET_ADC (1 << 20)
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#define WDT_RESET_GPIO (1 << 21)
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#define WDT_RESET_MCTP (1 << 22)
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#define WDT_RESET_XDMA (1 << 23)
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#define WDT_RESET_SPI (1 << 24)
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#define WDT_RESET_MISC (1 << 25)
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#define WDT_RESET_DEFAULT \
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(WDT_RESET_ARM | WDT_RESET_COPROC | WDT_RESET_I2C | \
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WDT_RESET_MAC1 | WDT_RESET_MAC2 | WDT_RESET_GCRT | \
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WDT_RESET_USB20 | WDT_RESET_USB11_HOST | WDT_RESET_USB11_EHCI2 | \
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WDT_RESET_VIDEO | WDT_RESET_HAC | WDT_RESET_LPC | \
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WDT_RESET_SDSDIO | WDT_RESET_MIC | WDT_RESET_CRT2C | \
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WDT_RESET_PWM | WDT_RESET_PECI | WDT_RESET_JTAG | \
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WDT_RESET_ADC | WDT_RESET_GPIO | WDT_RESET_MISC)
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#ifndef __ASSEMBLY__
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struct ast_wdt {
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u32 counter_status;
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u32 counter_reload_val;
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u32 counter_restart;
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u32 ctrl;
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u32 timeout_status;
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u32 clr_timeout_status;
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u32 reset_width;
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/* On pre-ast2500 SoCs this register is reserved. */
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u32 reset_mask;
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};
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/**
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* Given flags parameter passed to wdt_reset or wdt_start uclass functions,
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* gets Reset Mode value from it.
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*
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* @flags: flags parameter passed into wdt_reset or wdt_start
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* Return: Reset Mode value
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*/
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u32 ast_reset_mode_from_flags(ulong flags);
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/**
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* Given flags parameter passed to wdt_reset or wdt_start uclass functions,
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* gets Reset Mask value from it. Reset Mask is only supported on ast2500
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*
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* @flags: flags parameter passed into wdt_reset or wdt_start
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* Return: Reset Mask value
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*/
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u32 ast_reset_mask_from_flags(ulong flags);
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/**
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* Given Reset Mask and Reset Mode values, converts them to flags,
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* suitable for passing into wdt_start or wdt_reset uclass functions.
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*
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* On ast2500 Reset Mask is 25 bits wide and Reset Mode is 2 bits wide, so they
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* can both be packed into single 32 bits wide value.
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*
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* @reset_mode: Reset Mode
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* @reset_mask: Reset Mask
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*/
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ulong ast_flags_from_reset_mode_mask(u32 reset_mode, u32 reset_mask);
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#endif /* __ASSEMBLY__ */
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#endif /* _ASM_ARCH_WDT_H */
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