1 /***************************************************************************//**
2 * Copyright 2019-2020 Microchip FPGA Embedded Systems Solutions.
3 *
4 * SPDX-License-Identifier: MIT
5 *
6 * PolarFire SoC (MPFS) Microprocessor SubSystem Watchdog bare metal software
7 * driver implementation.
8 *
9 *
10 */
11
12 #include "mpfs_hal/mss_hal.h"
13 #include "mss_watchdog.h"
14
15 #ifdef __cplusplus
16 extern "C" {
17 #endif
18
19 WATCHDOG_TypeDef* wdog_hw_base[10] = {(WATCHDOG_TypeDef*)0x20001000,
20 (WATCHDOG_TypeDef*)0x20101000,
21 (WATCHDOG_TypeDef*)0x20103000,
22 (WATCHDOG_TypeDef*)0x20105000,
23 (WATCHDOG_TypeDef*)0x20107000,
24 (WATCHDOG_TypeDef*)0x28001000,
25 (WATCHDOG_TypeDef*)0x28101000,
26 (WATCHDOG_TypeDef*)0x28103000,
27 (WATCHDOG_TypeDef*)0x28105000,
28 (WATCHDOG_TypeDef*)0x28107000};
29
30 /***************************************************************************//**
31 * See mss_watchdog.h for details of how to use this function.
32 */
MSS_WD_configure(mss_watchdog_num_t wd_num,const mss_watchdog_config_t * config)33 uint8_t MSS_WD_configure
34 (
35 mss_watchdog_num_t wd_num,
36 const mss_watchdog_config_t * config
37 )
38 {
39 uint8_t error = 0u;
40
41 /* Note that the MSVP register value must always be <= TIMER register value.
42 After any write to register from offset 0x00 to 0x0c the TRIGGER,MSVP and
43 TIME registers are locked. Hence write them in proper sequence.
44 */
45 if (config->timeout_val <= MSS_WDOG_TRIGGER_MAX)
46 {
47 wdog_hw_base[wd_num]->TRIGGER = config->timeout_val;
48 }
49 else
50 {
51 error = 1u;
52 }
53
54 if (config->time_val <= MSS_WDOG_TIMER_MAX)
55 {
56 wdog_hw_base[wd_num]->MSVP = config->mvrp_val;
57 }
58 else
59 {
60 error = 1u;
61 }
62
63 if (config->time_val <= MSS_WDOG_TIMER_MAX)
64 {
65 wdog_hw_base[wd_num]->TIME = config->time_val;
66 }
67 else
68 {
69 error = 1u;
70 }
71
72 wdog_hw_base[wd_num]->CONTROL = (uint32_t)(config->forbidden_en <<
73 MSS_WDOG_ENA_FORBIDDEN);
74
75 /* Reload watchdog with new load if it is not in forbidden window. */
76 if (!(MSS_WDOG_FORBIDDEN_MASK & wdog_hw_base[wd_num]->STATUS))
77 {
78 wdog_hw_base[wd_num]->REFRESH = MSS_WDOG_REFRESH_KEY;
79 }
80 else
81 {
82 error = 1u;
83 }
84
85 return(error);
86 }
87
88 /***************************************************************************//**
89 * See mss_watchdog.h for details of how to use this function.
90 */
MSS_WD_get_config(mss_watchdog_num_t wd_num,mss_watchdog_config_t * config)91 void MSS_WD_get_config
92 (
93 mss_watchdog_num_t wd_num, mss_watchdog_config_t* config
94 )
95 {
96 if((WATCHDOG_TypeDef*)0 != wdog_hw_base[wd_num])
97 {
98 config->time_val = wdog_hw_base[wd_num]->TIME;
99 config->timeout_val = wdog_hw_base[wd_num]->TRIGGER;
100 config->mvrp_val = wdog_hw_base[wd_num]->MSVP;
101
102 config->forbidden_en = (uint8_t)((wdog_hw_base[wd_num]->CONTROL &
103 MSS_WDOG_ENA_FORBIDDEN_MASK)
104 >> MSS_WDOG_ENA_FORBIDDEN);
105 }
106 }
107
108 #ifdef __cplusplus
109 }
110 #endif
111
112
