Pieter De Gendt | 4d161a3 | 2021-11-15 11:00:07 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2021 Basalte bv |
| 3 | * |
| 4 | * SPDX-License-Identifier: Apache-2.0 |
| 5 | */ |
| 6 | |
| 7 | #define DT_DRV_COMPAT nxp_imx_snvs_rtc |
Gerard Marull-Paretas | fb60aab | 2022-05-06 10:25:46 +0200 | [diff] [blame] | 8 | #include <zephyr/logging/log.h> |
Pieter De Gendt | 4d161a3 | 2021-11-15 11:00:07 +0100 | [diff] [blame] | 9 | |
| 10 | LOG_MODULE_REGISTER(mcux_snvs, CONFIG_COUNTER_LOG_LEVEL); |
| 11 | |
| 12 | #if CONFIG_COUNTER_MCUX_SNVS_SRTC |
| 13 | #define MCUX_SNVS_SRTC |
| 14 | #define MCUX_SNVS_NUM_CHANNELS 2 |
| 15 | #else |
| 16 | #define MCUX_SNVS_NUM_CHANNELS 1 |
| 17 | #endif |
| 18 | |
Gerard Marull-Paretas | fb60aab | 2022-05-06 10:25:46 +0200 | [diff] [blame] | 19 | #include <zephyr/drivers/counter.h> |
Gerard Marull-Paretas | acc8cb4 | 2022-10-04 15:33:53 +0200 | [diff] [blame] | 20 | #include <zephyr/irq.h> |
Pieter De Gendt | 4d161a3 | 2021-11-15 11:00:07 +0100 | [diff] [blame] | 21 | #include <fsl_snvs_hp.h> |
| 22 | |
| 23 | #ifdef MCUX_SNVS_SRTC |
| 24 | #include <fsl_snvs_lp.h> |
| 25 | #endif |
| 26 | |
| 27 | struct mcux_snvs_config { |
| 28 | /* info must be first element */ |
| 29 | struct counter_config_info info; |
| 30 | SNVS_Type *base; |
| 31 | void (*irq_config_func)(const struct device *dev); |
| 32 | }; |
| 33 | |
| 34 | struct mcux_snvs_data { |
| 35 | counter_alarm_callback_t alarm_hp_rtc_callback; |
| 36 | void *alarm_hp_rtc_user_data; |
| 37 | #ifdef MCUX_SNVS_SRTC |
| 38 | counter_alarm_callback_t alarm_lp_srtc_callback; |
| 39 | void *alarm_lp_srtc_user_data; |
| 40 | #endif |
| 41 | }; |
| 42 | |
| 43 | static int mcux_snvs_start(const struct device *dev) |
| 44 | { |
| 45 | ARG_UNUSED(dev); |
| 46 | |
| 47 | return -EALREADY; |
| 48 | } |
| 49 | |
| 50 | static int mcux_snvs_stop(const struct device *dev) |
| 51 | { |
| 52 | ARG_UNUSED(dev); |
| 53 | |
| 54 | return -ENOTSUP; |
| 55 | } |
| 56 | |
| 57 | static int mcux_snvs_get_value(const struct device *dev, uint32_t *ticks) |
| 58 | { |
| 59 | const struct mcux_snvs_config *config = dev->config; |
| 60 | uint32_t tmp = 0; |
| 61 | |
| 62 | do { |
| 63 | *ticks = tmp; |
| 64 | tmp = (config->base->HPRTCMR << 17U); |
| 65 | tmp |= (config->base->HPRTCLR >> 15U); |
| 66 | } while (*ticks != tmp); |
| 67 | |
| 68 | return 0; |
| 69 | } |
| 70 | |
| 71 | static int mcux_snvs_set_alarm(const struct device *dev, |
| 72 | uint8_t chan_id, |
| 73 | const struct counter_alarm_cfg *alarm_cfg) |
| 74 | { |
| 75 | const struct mcux_snvs_config *config = dev->config; |
| 76 | struct mcux_snvs_data *data = dev->data; |
| 77 | |
| 78 | uint32_t current, ticks; |
| 79 | |
| 80 | mcux_snvs_get_value(dev, ¤t); |
| 81 | ticks = alarm_cfg->ticks; |
| 82 | |
| 83 | if ((alarm_cfg->flags & COUNTER_ALARM_CFG_ABSOLUTE) == 0) { |
| 84 | ticks += current; |
| 85 | } |
| 86 | |
| 87 | if (ticks < current) { |
| 88 | LOG_ERR("Invalid alarm ticks"); |
| 89 | return -EINVAL; |
| 90 | } |
| 91 | |
| 92 | if (chan_id == 0) { |
| 93 | if (data->alarm_hp_rtc_callback) { |
| 94 | return -EBUSY; |
| 95 | } |
| 96 | data->alarm_hp_rtc_callback = alarm_cfg->callback; |
| 97 | data->alarm_hp_rtc_user_data = alarm_cfg->user_data; |
| 98 | |
| 99 | /* disable RTC alarm interrupt */ |
| 100 | config->base->HPCR &= ~SNVS_HPCR_HPTA_EN_MASK; |
| 101 | while ((config->base->HPCR & SNVS_HPCR_HPTA_EN_MASK) != 0U) { |
| 102 | } |
| 103 | |
| 104 | /* Set alarm in seconds*/ |
| 105 | config->base->HPTAMR = (uint32_t)(ticks >> 17U); |
| 106 | config->base->HPTALR = (uint32_t)(ticks << 15U); |
| 107 | |
| 108 | /* enable RTC alarm interrupt */ |
| 109 | config->base->HPCR |= SNVS_HPCR_HPTA_EN_MASK; |
| 110 | #ifdef MCUX_SNVS_SRTC |
| 111 | } else if (chan_id == 1) { |
| 112 | if (data->alarm_lp_srtc_callback) { |
| 113 | return -EBUSY; |
| 114 | } |
| 115 | data->alarm_lp_srtc_callback = alarm_cfg->callback; |
| 116 | data->alarm_lp_srtc_user_data = alarm_cfg->user_data; |
| 117 | |
| 118 | /* disable SRTC alarm interrupt */ |
| 119 | config->base->LPCR &= ~SNVS_LPCR_LPTA_EN_MASK; |
| 120 | while ((config->base->LPCR & SNVS_LPCR_LPTA_EN_MASK) != 0U) { |
| 121 | } |
| 122 | |
| 123 | /* Set alarm in seconds*/ |
| 124 | config->base->LPTAR = ticks; |
| 125 | |
| 126 | /* enable SRTC alarm interrupt */ |
| 127 | config->base->LPCR |= SNVS_LPCR_LPTA_EN_MASK; |
| 128 | #endif |
| 129 | } else { |
| 130 | LOG_ERR("Invalid channel id"); |
| 131 | return -EINVAL; |
| 132 | } |
| 133 | |
| 134 | return 0; |
| 135 | } |
| 136 | |
| 137 | static int mcux_snvs_cancel_alarm(const struct device *dev, |
| 138 | uint8_t chan_id) |
| 139 | { |
| 140 | const struct mcux_snvs_config *config = dev->config; |
| 141 | struct mcux_snvs_data *data = dev->data; |
| 142 | |
| 143 | if (chan_id == 0) { |
| 144 | /* disable RTC alarm interrupt */ |
| 145 | config->base->HPCR &= ~SNVS_HPCR_HPTA_EN_MASK; |
| 146 | while ((config->base->HPCR & SNVS_HPCR_HPTA_EN_MASK) != 0U) { |
| 147 | } |
| 148 | |
| 149 | /* clear callback */ |
| 150 | data->alarm_hp_rtc_callback = NULL; |
| 151 | |
| 152 | #ifdef MCUX_SNVS_SRTC |
| 153 | } else if (chan_id == 1) { |
| 154 | /* disable SRTC alarm interrupt */ |
| 155 | config->base->LPCR &= ~SNVS_LPCR_LPTA_EN_MASK; |
| 156 | while ((config->base->LPCR & SNVS_LPCR_LPTA_EN_MASK) != 0U) { |
| 157 | } |
| 158 | |
| 159 | /* clear callback */ |
| 160 | data->alarm_lp_srtc_callback = NULL; |
| 161 | #endif |
| 162 | } else { |
| 163 | LOG_ERR("Invalid channel id"); |
| 164 | return -EINVAL; |
| 165 | } |
| 166 | |
| 167 | return 0; |
| 168 | } |
| 169 | |
| 170 | static int mcux_snvs_set_top_value(const struct device *dev, |
| 171 | const struct counter_top_cfg *cfg) |
| 172 | { |
| 173 | ARG_UNUSED(dev); |
| 174 | ARG_UNUSED(cfg); |
| 175 | |
| 176 | return -ENOTSUP; |
| 177 | } |
| 178 | |
| 179 | static uint32_t mcux_snvs_get_pending_int(const struct device *dev) |
| 180 | { |
| 181 | const struct mcux_snvs_config *config = dev->config; |
| 182 | uint32_t flags; |
| 183 | |
| 184 | flags = SNVS_HP_RTC_GetStatusFlags(config->base) & kSNVS_RTC_AlarmInterruptFlag; |
| 185 | |
| 186 | #ifdef MCUX_SNVS_SRTC |
| 187 | flags |= SNVS_LP_SRTC_GetStatusFlags(config->base) & kSNVS_SRTC_AlarmInterruptFlag; |
| 188 | #endif |
| 189 | |
| 190 | return flags; |
| 191 | } |
| 192 | |
| 193 | static uint32_t mcux_snvs_get_top_value(const struct device *dev) |
| 194 | { |
| 195 | ARG_UNUSED(dev); |
| 196 | |
| 197 | return UINT32_MAX; |
| 198 | } |
| 199 | |
| 200 | void mcux_snvs_isr(const struct device *dev) |
| 201 | { |
| 202 | const struct mcux_snvs_config *config = dev->config; |
| 203 | struct mcux_snvs_data *data = dev->data; |
| 204 | |
| 205 | uint32_t current; |
| 206 | |
| 207 | mcux_snvs_get_value(dev, ¤t); |
| 208 | |
| 209 | if (SNVS_HP_RTC_GetStatusFlags(config->base) & kSNVS_RTC_AlarmInterruptFlag) { |
| 210 | /* Clear alarm flag */ |
| 211 | SNVS_HP_RTC_ClearStatusFlags(config->base, kSNVS_RTC_AlarmInterruptFlag); |
| 212 | |
| 213 | if (data->alarm_hp_rtc_callback) { |
| 214 | data->alarm_hp_rtc_callback(dev, 0, current, data->alarm_hp_rtc_user_data); |
| 215 | |
| 216 | mcux_snvs_cancel_alarm(dev, 0); |
| 217 | } |
| 218 | } |
| 219 | |
| 220 | #ifdef MCUX_SNVS_SRTC |
| 221 | if (SNVS_LP_SRTC_GetStatusFlags(config->base) & kSNVS_SRTC_AlarmInterruptFlag) { |
| 222 | /* Clear alarm flag */ |
| 223 | SNVS_LP_SRTC_ClearStatusFlags(config->base, kSNVS_SRTC_AlarmInterruptFlag); |
| 224 | |
| 225 | if (data->alarm_lp_srtc_callback) { |
| 226 | data->alarm_lp_srtc_callback(dev, 1, current, |
| 227 | data->alarm_lp_srtc_user_data); |
| 228 | mcux_snvs_cancel_alarm(dev, 1); |
| 229 | } |
| 230 | } |
| 231 | #endif |
| 232 | } |
| 233 | |
| 234 | int mcux_snvs_rtc_set(const struct device *dev, uint32_t ticks) |
| 235 | { |
| 236 | const struct mcux_snvs_config *config = dev->config; |
| 237 | |
| 238 | #ifdef MCUX_SNVS_SRTC |
| 239 | SNVS_LP_SRTC_StopTimer(config->base); |
| 240 | |
| 241 | config->base->LPSRTCMR = (uint32_t)(ticks >> 17U); |
| 242 | config->base->LPSRTCLR = (uint32_t)(ticks << 15U); |
| 243 | |
| 244 | SNVS_LP_SRTC_StartTimer(config->base); |
| 245 | /* Sync to our high power RTC */ |
| 246 | SNVS_HP_RTC_TimeSynchronize(config->base); |
| 247 | #else |
| 248 | SNVS_HP_RTC_StopTimer(config->base); |
| 249 | |
| 250 | config->base->HPRTCMR = (uint32_t)(ticks >> 17U); |
| 251 | config->base->HPRTCLR = (uint32_t)(ticks << 15U); |
| 252 | |
| 253 | SNVS_HP_RTC_StartTimer(config->base); |
| 254 | #endif |
| 255 | |
| 256 | return 0; |
| 257 | } |
| 258 | |
| 259 | static int mcux_snvs_init(const struct device *dev) |
| 260 | { |
| 261 | const struct mcux_snvs_config *config = dev->config; |
| 262 | |
| 263 | snvs_hp_rtc_config_t hp_rtc_config; |
| 264 | |
| 265 | #ifdef MCUX_SNVS_SRTC |
| 266 | snvs_lp_srtc_config_t lp_srtc_config; |
| 267 | #endif |
| 268 | |
| 269 | SNVS_HP_RTC_GetDefaultConfig(&hp_rtc_config); |
| 270 | SNVS_HP_RTC_Init(config->base, &hp_rtc_config); |
| 271 | |
| 272 | #ifdef MCUX_SNVS_SRTC |
| 273 | /* Reset power glitch detector */ |
| 274 | SNVS_LP_Init(config->base); |
| 275 | /* Init SRTC to default config */ |
| 276 | SNVS_LP_SRTC_GetDefaultConfig(&lp_srtc_config); |
| 277 | SNVS_LP_SRTC_Init(config->base, &lp_srtc_config); |
| 278 | |
| 279 | #if CONFIG_COUNTER_MCUX_SNVS_SRTC_WAKE |
| 280 | config->base->LPCR |= SNVS_LPCR_LPWUI_EN_MASK; |
| 281 | #endif |
| 282 | |
| 283 | /* RTC should always run */ |
| 284 | SNVS_LP_SRTC_StartTimer(config->base); |
| 285 | SNVS_HP_RTC_TimeSynchronize(config->base); |
| 286 | #endif |
| 287 | |
| 288 | /* RTC should always run */ |
| 289 | SNVS_HP_RTC_StartTimer(config->base); |
| 290 | |
| 291 | config->irq_config_func(dev); |
| 292 | |
| 293 | return 0; |
| 294 | } |
| 295 | |
| 296 | static const struct counter_driver_api mcux_snvs_driver_api = { |
| 297 | .start = mcux_snvs_start, |
| 298 | .stop = mcux_snvs_stop, |
| 299 | .get_value = mcux_snvs_get_value, |
| 300 | .set_alarm = mcux_snvs_set_alarm, |
| 301 | .cancel_alarm = mcux_snvs_cancel_alarm, |
| 302 | .set_top_value = mcux_snvs_set_top_value, |
| 303 | .get_pending_int = mcux_snvs_get_pending_int, |
| 304 | .get_top_value = mcux_snvs_get_top_value, |
| 305 | }; |
| 306 | |
| 307 | /* |
| 308 | * This driver is single-instance. If the devicetree contains multiple |
| 309 | * instances, this will fail and the driver needs to be revisited. |
| 310 | */ |
| 311 | BUILD_ASSERT(DT_NUM_INST_STATUS_OKAY(DT_DRV_COMPAT) <= 1, |
| 312 | "unsupported snvs instance"); |
| 313 | |
| 314 | #if DT_NODE_HAS_STATUS(DT_DRV_INST(0), okay) |
| 315 | static struct mcux_snvs_data mcux_snvs_data_0; |
| 316 | |
| 317 | static void mcux_snvs_irq_config_0(const struct device *dev); |
| 318 | |
| 319 | static struct mcux_snvs_config mcux_snvs_config_0 = { |
| 320 | .info = { |
| 321 | .max_top_value = 0, |
| 322 | .freq = 1, |
| 323 | .channels = MCUX_SNVS_NUM_CHANNELS, |
| 324 | .flags = COUNTER_CONFIG_INFO_COUNT_UP, |
| 325 | }, |
Gerard Marull-Paretas | 3e9d8da | 2021-12-15 11:58:44 +0100 | [diff] [blame] | 326 | .base = (SNVS_Type *)DT_REG_ADDR(DT_INST_PARENT(0)), |
Pieter De Gendt | 4d161a3 | 2021-11-15 11:00:07 +0100 | [diff] [blame] | 327 | .irq_config_func = mcux_snvs_irq_config_0, |
| 328 | }; |
| 329 | |
| 330 | DEVICE_DT_INST_DEFINE(0, &mcux_snvs_init, NULL, |
| 331 | &mcux_snvs_data_0, |
| 332 | &mcux_snvs_config_0, |
| 333 | POST_KERNEL, CONFIG_COUNTER_INIT_PRIORITY, |
| 334 | &mcux_snvs_driver_api); |
| 335 | |
| 336 | static void mcux_snvs_irq_config_0(const struct device *dev) |
| 337 | { |
| 338 | IRQ_CONNECT(DT_INST_IRQN(0), DT_INST_IRQ(0, priority), |
| 339 | mcux_snvs_isr, DEVICE_DT_INST_GET(0), 0); |
| 340 | irq_enable(DT_INST_IRQN(0)); |
| 341 | } |
| 342 | #endif /* DT_NODE_HAS_STATUS(DT_DRV_INST(0), okay) */ |