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/*
* (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;
/* 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);
#ifndef CONFIG_WDT
/**
* Stop WDT
*
* @wdt: watchdog to stop
*
* When using driver model this function has different signature
*/
void wdt_stop(struct ast_wdt *wdt);
/**
* Stop WDT
*
* @wdt: watchdog to start
* @timeout watchdog timeout in number of clock ticks
*
* When using driver model this function has different signature
*/
void wdt_start(struct ast_wdt *wdt, u32 timeout);
#endif /* CONFIG_WDT */
/**
* 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 */
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