1 /*
2 *
3 * Copyright (c) 2018, NXP
4
5 * SPDX-License-Identifier: Apache-2.0
6 */
7
8 #define DT_DRV_COMPAT nxp_kinetis_wdog
9
10 #include <zephyr/drivers/watchdog.h>
11 #include <zephyr/drivers/clock_control.h>
12 #include <zephyr/irq.h>
13 #include <fsl_wdog.h>
14
15 #define LOG_LEVEL CONFIG_WDT_LOG_LEVEL
16 #include <zephyr/logging/log.h>
17 LOG_MODULE_REGISTER(wdt_mcux_wdog);
18
19 #define MIN_TIMEOUT 4
20
21 struct mcux_wdog_config {
22 WDOG_Type *base;
23 const struct device *clock_dev;
24 clock_control_subsys_t clock_subsys;
25 void (*irq_config_func)(const struct device *dev);
26 };
27
28 struct mcux_wdog_data {
29 wdt_callback_t callback;
30 wdog_config_t wdog_config;
31 bool timeout_valid;
32 };
33
mcux_wdog_setup(const struct device * dev,uint8_t options)34 static int mcux_wdog_setup(const struct device *dev, uint8_t options)
35 {
36 const struct mcux_wdog_config *config = dev->config;
37 struct mcux_wdog_data *data = dev->data;
38 WDOG_Type *base = config->base;
39
40 if (!data->timeout_valid) {
41 LOG_ERR("No valid timeouts installed");
42 return -EINVAL;
43 }
44
45 data->wdog_config.workMode.enableStop =
46 (options & WDT_OPT_PAUSE_IN_SLEEP) == 0U;
47
48 data->wdog_config.workMode.enableDebug =
49 (options & WDT_OPT_PAUSE_HALTED_BY_DBG) == 0U;
50
51 WDOG_Init(base, &data->wdog_config);
52 LOG_DBG("Setup the watchdog");
53
54 return 0;
55 }
56
mcux_wdog_disable(const struct device * dev)57 static int mcux_wdog_disable(const struct device *dev)
58 {
59 const struct mcux_wdog_config *config = dev->config;
60 struct mcux_wdog_data *data = dev->data;
61 WDOG_Type *base = config->base;
62
63 WDOG_Deinit(base);
64 data->timeout_valid = false;
65 LOG_DBG("Disabled the watchdog");
66
67 return 0;
68 }
69
mcux_wdog_install_timeout(const struct device * dev,const struct wdt_timeout_cfg * cfg)70 static int mcux_wdog_install_timeout(const struct device *dev,
71 const struct wdt_timeout_cfg *cfg)
72 {
73 const struct mcux_wdog_config *config = dev->config;
74 struct mcux_wdog_data *data = dev->data;
75 uint32_t clock_freq;
76
77 if (data->timeout_valid) {
78 LOG_ERR("No more timeouts can be installed");
79 return -ENOMEM;
80 }
81
82 if (!device_is_ready(config->clock_dev)) {
83 LOG_ERR("clock control device not ready");
84 return -ENODEV;
85 }
86
87 if (clock_control_get_rate(config->clock_dev, config->clock_subsys,
88 &clock_freq)) {
89 return -EINVAL;
90 }
91
92 WDOG_GetDefaultConfig(&data->wdog_config);
93
94 data->wdog_config.timeoutValue = clock_freq * cfg->window.max / 1000U;
95
96 if (cfg->window.min) {
97 data->wdog_config.enableWindowMode = true;
98 data->wdog_config.windowValue =
99 clock_freq * cfg->window.min / 1000U;
100 } else {
101 data->wdog_config.enableWindowMode = false;
102 data->wdog_config.windowValue = 0;
103 }
104
105 if ((data->wdog_config.timeoutValue < MIN_TIMEOUT) ||
106 (data->wdog_config.timeoutValue < data->wdog_config.windowValue)) {
107 LOG_ERR("Invalid timeout");
108 return -EINVAL;
109 }
110
111 data->wdog_config.clockSource = kWDOG_LpoClockSource;
112 data->wdog_config.enableInterrupt = cfg->callback != NULL;
113 data->callback = cfg->callback;
114 data->timeout_valid = true;
115
116 return 0;
117 }
118
mcux_wdog_feed(const struct device * dev,int channel_id)119 static int mcux_wdog_feed(const struct device *dev, int channel_id)
120 {
121 const struct mcux_wdog_config *config = dev->config;
122 WDOG_Type *base = config->base;
123
124 if (channel_id != 0) {
125 LOG_ERR("Invalid channel id");
126 return -EINVAL;
127 }
128
129 WDOG_Refresh(base);
130 LOG_DBG("Fed the watchdog");
131
132 return 0;
133 }
134
mcux_wdog_isr(const struct device * dev)135 static void mcux_wdog_isr(const struct device *dev)
136 {
137 const struct mcux_wdog_config *config = dev->config;
138 struct mcux_wdog_data *data = dev->data;
139 WDOG_Type *base = config->base;
140 uint32_t flags;
141
142 flags = WDOG_GetStatusFlags(base);
143 WDOG_ClearStatusFlags(base, flags);
144
145 if (data->callback) {
146 data->callback(dev, 0);
147 }
148 }
149
mcux_wdog_init(const struct device * dev)150 static int mcux_wdog_init(const struct device *dev)
151 {
152 const struct mcux_wdog_config *config = dev->config;
153
154 config->irq_config_func(dev);
155
156 return 0;
157 }
158
159 static const struct wdt_driver_api mcux_wdog_api = {
160 .setup = mcux_wdog_setup,
161 .disable = mcux_wdog_disable,
162 .install_timeout = mcux_wdog_install_timeout,
163 .feed = mcux_wdog_feed,
164 };
165
166 static void mcux_wdog_config_func_0(const struct device *dev);
167
168 static const struct mcux_wdog_config mcux_wdog_config_0 = {
169 .base = (WDOG_Type *) DT_INST_REG_ADDR(0),
170 .clock_dev = DEVICE_DT_GET(DT_INST_CLOCKS_CTLR(0)),
171 .clock_subsys = (clock_control_subsys_t)
172 DT_INST_CLOCKS_CELL(0, name),
173 .irq_config_func = mcux_wdog_config_func_0,
174 };
175
176 static struct mcux_wdog_data mcux_wdog_data_0;
177
178 DEVICE_DT_INST_DEFINE(0,
179 &mcux_wdog_init,
180 NULL,
181 &mcux_wdog_data_0, &mcux_wdog_config_0,
182 POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE,
183 &mcux_wdog_api);
184
mcux_wdog_config_func_0(const struct device * dev)185 static void mcux_wdog_config_func_0(const struct device *dev)
186 {
187 IRQ_CONNECT(DT_INST_IRQN(0),
188 DT_INST_IRQ(0, priority),
189 mcux_wdog_isr, DEVICE_DT_INST_GET(0), 0);
190
191 irq_enable(DT_INST_IRQN(0));
192 }
193
