1 /*
2 * Copyright (c) 2017,2021 NXP
3 * Copyright (c) 2020 Softube
4 *
5 * SPDX-License-Identifier: Apache-2.0
6 */
7
8 #define DT_DRV_COMPAT nxp_kinetis_lpuart
9
10 #include <errno.h>
11 #include <zephyr/device.h>
12 #include <zephyr/drivers/uart.h>
13 #include <zephyr/drivers/clock_control.h>
14 #include <zephyr/irq.h>
15 #include <zephyr/kernel.h>
16 #include <zephyr/pm/policy.h>
17 #include <zephyr/drivers/pinctrl.h>
18 #ifdef CONFIG_UART_ASYNC_API
19 #include <zephyr/drivers/dma.h>
20 #endif
21 #include <zephyr/logging/log.h>
22
23 #include <fsl_lpuart.h>
24
25 LOG_MODULE_REGISTER(uart_mcux_lpuart, LOG_LEVEL_ERR);
26
27 #ifdef CONFIG_UART_ASYNC_API
28 struct lpuart_dma_config {
29 const struct device *dma_dev;
30 const uint32_t dma_channel;
31 struct dma_config dma_cfg;
32 };
33 #endif /* CONFIG_UART_ASYNC_API */
34
35 struct mcux_lpuart_config {
36 LPUART_Type *base;
37 const struct device *clock_dev;
38 const struct pinctrl_dev_config *pincfg;
39 clock_control_subsys_t clock_subsys;
40 uint32_t baud_rate;
41 uint8_t flow_ctrl;
42 uint8_t parity;
43 bool rs485_de_active_low;
44 bool loopback_en;
45 #ifdef CONFIG_UART_MCUX_LPUART_ISR_SUPPORT
46 void (*irq_config_func)(const struct device *dev);
47 #endif
48 #ifdef CONFIG_UART_ASYNC_API
49 const struct lpuart_dma_config rx_dma_config;
50 const struct lpuart_dma_config tx_dma_config;
51 #endif /* CONFIG_UART_ASYNC_API */
52 };
53
54 #ifdef CONFIG_UART_ASYNC_API
55 struct mcux_lpuart_rx_dma_params {
56 struct dma_block_config active_dma_block;
57 uint8_t *buf;
58 size_t buf_len;
59 size_t offset;
60 size_t counter;
61 struct k_work_delayable timeout_work;
62 size_t timeout_us;
63 };
64
65 struct mcux_lpuart_tx_dma_params {
66 struct dma_block_config active_dma_block;
67 const uint8_t *buf;
68 size_t buf_len;
69 struct k_work_delayable timeout_work;
70 size_t timeout_us;
71 };
72
73 struct mcux_lpuart_async_data {
74 const struct device *uart_dev;
75 struct mcux_lpuart_tx_dma_params tx_dma_params;
76 struct mcux_lpuart_rx_dma_params rx_dma_params;
77 uint8_t *next_rx_buffer;
78 size_t next_rx_buffer_len;
79 uart_callback_t user_callback;
80 void *user_data;
81 };
82 #endif
83
84 struct mcux_lpuart_data {
85 #ifdef CONFIG_UART_INTERRUPT_DRIVEN
86 uart_irq_callback_user_data_t callback;
87 void *cb_data;
88 #endif
89 #ifdef CONFIG_PM
90 bool pm_state_lock_on;
91 bool tx_poll_stream_on;
92 bool tx_int_stream_on;
93 #endif /* CONFIG_PM */
94 #ifdef CONFIG_UART_ASYNC_API
95 struct mcux_lpuart_async_data async;
96 #endif
97 struct uart_config uart_config;
98 };
99
100 #ifdef CONFIG_PM
mcux_lpuart_pm_policy_state_lock_get(const struct device * dev)101 static void mcux_lpuart_pm_policy_state_lock_get(const struct device *dev)
102 {
103 struct mcux_lpuart_data *data = dev->data;
104
105 if (!data->pm_state_lock_on) {
106 data->pm_state_lock_on = true;
107 pm_policy_state_lock_get(PM_STATE_SUSPEND_TO_IDLE, PM_ALL_SUBSTATES);
108 }
109 }
110
mcux_lpuart_pm_policy_state_lock_put(const struct device * dev)111 static void mcux_lpuart_pm_policy_state_lock_put(const struct device *dev)
112 {
113 struct mcux_lpuart_data *data = dev->data;
114
115 if (data->pm_state_lock_on) {
116 data->pm_state_lock_on = false;
117 pm_policy_state_lock_put(PM_STATE_SUSPEND_TO_IDLE, PM_ALL_SUBSTATES);
118 }
119 }
120 #endif /* CONFIG_PM */
121
mcux_lpuart_poll_in(const struct device * dev,unsigned char * c)122 static int mcux_lpuart_poll_in(const struct device *dev, unsigned char *c)
123 {
124 const struct mcux_lpuart_config *config = dev->config;
125 uint32_t flags = LPUART_GetStatusFlags(config->base);
126 int ret = -1;
127
128 if (flags & kLPUART_RxDataRegFullFlag) {
129 *c = LPUART_ReadByte(config->base);
130 ret = 0;
131 }
132
133 return ret;
134 }
135
mcux_lpuart_poll_out(const struct device * dev,unsigned char c)136 static void mcux_lpuart_poll_out(const struct device *dev, unsigned char c)
137 {
138 const struct mcux_lpuart_config *config = dev->config;
139 unsigned int key;
140 #ifdef CONFIG_PM
141 struct mcux_lpuart_data *data = dev->data;
142 #endif
143
144 while (!(LPUART_GetStatusFlags(config->base)
145 & kLPUART_TxDataRegEmptyFlag)) {
146 }
147 /* Lock interrupts while we send data */
148 key = irq_lock();
149 #ifdef CONFIG_PM
150 /*
151 * We must keep the part from entering lower power mode until the
152 * transmission completes. Set the power constraint, and enable
153 * the transmission complete interrupt so we know when transmission is
154 * completed.
155 */
156 if (!data->tx_poll_stream_on && !data->tx_int_stream_on) {
157 data->tx_poll_stream_on = true;
158 mcux_lpuart_pm_policy_state_lock_get(dev);
159 /* Enable TC interrupt */
160 LPUART_EnableInterrupts(config->base,
161 kLPUART_TransmissionCompleteInterruptEnable);
162
163 }
164 #endif /* CONFIG_PM */
165
166 LPUART_WriteByte(config->base, c);
167 irq_unlock(key);
168 }
169
mcux_lpuart_err_check(const struct device * dev)170 static int mcux_lpuart_err_check(const struct device *dev)
171 {
172 const struct mcux_lpuart_config *config = dev->config;
173 uint32_t flags = LPUART_GetStatusFlags(config->base);
174 int err = 0;
175
176 if (flags & kLPUART_RxOverrunFlag) {
177 err |= UART_ERROR_OVERRUN;
178 }
179
180 if (flags & kLPUART_ParityErrorFlag) {
181 err |= UART_ERROR_PARITY;
182 }
183
184 if (flags & kLPUART_FramingErrorFlag) {
185 err |= UART_ERROR_FRAMING;
186 }
187
188 if (flags & kLPUART_NoiseErrorFlag) {
189 err |= UART_ERROR_PARITY;
190 }
191
192 LPUART_ClearStatusFlags(config->base, kLPUART_RxOverrunFlag |
193 kLPUART_ParityErrorFlag |
194 kLPUART_FramingErrorFlag |
195 kLPUART_NoiseErrorFlag);
196
197 return err;
198 }
199
200 #ifdef CONFIG_UART_INTERRUPT_DRIVEN
mcux_lpuart_fifo_fill(const struct device * dev,const uint8_t * tx_data,int len)201 static int mcux_lpuart_fifo_fill(const struct device *dev,
202 const uint8_t *tx_data,
203 int len)
204 {
205 const struct mcux_lpuart_config *config = dev->config;
206 uint8_t num_tx = 0U;
207
208 while ((len - num_tx > 0) &&
209 (LPUART_GetStatusFlags(config->base)
210 & kLPUART_TxDataRegEmptyFlag)) {
211
212 LPUART_WriteByte(config->base, tx_data[num_tx++]);
213 }
214 return num_tx;
215 }
216
mcux_lpuart_fifo_read(const struct device * dev,uint8_t * rx_data,const int len)217 static int mcux_lpuart_fifo_read(const struct device *dev, uint8_t *rx_data,
218 const int len)
219 {
220 const struct mcux_lpuart_config *config = dev->config;
221 uint8_t num_rx = 0U;
222
223 while ((len - num_rx > 0) &&
224 (LPUART_GetStatusFlags(config->base)
225 & kLPUART_RxDataRegFullFlag)) {
226
227 rx_data[num_rx++] = LPUART_ReadByte(config->base);
228 }
229
230 return num_rx;
231 }
232
mcux_lpuart_irq_tx_enable(const struct device * dev)233 static void mcux_lpuart_irq_tx_enable(const struct device *dev)
234 {
235 const struct mcux_lpuart_config *config = dev->config;
236 uint32_t mask = kLPUART_TxDataRegEmptyInterruptEnable;
237 #ifdef CONFIG_PM
238 struct mcux_lpuart_data *data = dev->data;
239 unsigned int key;
240 #endif
241
242 #ifdef CONFIG_PM
243 key = irq_lock();
244 data->tx_poll_stream_on = false;
245 data->tx_int_stream_on = true;
246 /* Transmission complete interrupt no longer required */
247 LPUART_DisableInterrupts(config->base,
248 kLPUART_TransmissionCompleteInterruptEnable);
249 /* Do not allow system to sleep while UART tx is ongoing */
250 mcux_lpuart_pm_policy_state_lock_get(dev);
251 #endif
252 LPUART_EnableInterrupts(config->base, mask);
253 #ifdef CONFIG_PM
254 irq_unlock(key);
255 #endif
256 }
257
mcux_lpuart_irq_tx_disable(const struct device * dev)258 static void mcux_lpuart_irq_tx_disable(const struct device *dev)
259 {
260 const struct mcux_lpuart_config *config = dev->config;
261 uint32_t mask = kLPUART_TxDataRegEmptyInterruptEnable;
262 #ifdef CONFIG_PM
263 struct mcux_lpuart_data *data = dev->data;
264 unsigned int key;
265
266 key = irq_lock();
267 #endif
268
269 LPUART_DisableInterrupts(config->base, mask);
270 #ifdef CONFIG_PM
271 data->tx_int_stream_on = false;
272 /*
273 * If transmission IRQ is no longer enabled,
274 * transmission is complete. Release pm constraint.
275 */
276 mcux_lpuart_pm_policy_state_lock_put(dev);
277 irq_unlock(key);
278 #endif
279 }
280
mcux_lpuart_irq_tx_complete(const struct device * dev)281 static int mcux_lpuart_irq_tx_complete(const struct device *dev)
282 {
283 const struct mcux_lpuart_config *config = dev->config;
284 uint32_t flags = LPUART_GetStatusFlags(config->base);
285
286 return (flags & kLPUART_TransmissionCompleteFlag) != 0U;
287 }
288
mcux_lpuart_irq_tx_ready(const struct device * dev)289 static int mcux_lpuart_irq_tx_ready(const struct device *dev)
290 {
291 const struct mcux_lpuart_config *config = dev->config;
292 uint32_t mask = kLPUART_TxDataRegEmptyInterruptEnable;
293 uint32_t flags = LPUART_GetStatusFlags(config->base);
294
295 return (LPUART_GetEnabledInterrupts(config->base) & mask)
296 && (flags & kLPUART_TxDataRegEmptyFlag);
297 }
298
mcux_lpuart_irq_rx_enable(const struct device * dev)299 static void mcux_lpuart_irq_rx_enable(const struct device *dev)
300 {
301 const struct mcux_lpuart_config *config = dev->config;
302 uint32_t mask = kLPUART_RxDataRegFullInterruptEnable;
303
304 LPUART_EnableInterrupts(config->base, mask);
305 LPUART_EnableRx(config->base, true);
306 }
307
mcux_lpuart_irq_rx_disable(const struct device * dev)308 static void mcux_lpuart_irq_rx_disable(const struct device *dev)
309 {
310 const struct mcux_lpuart_config *config = dev->config;
311 uint32_t mask = kLPUART_RxDataRegFullInterruptEnable;
312
313 LPUART_EnableRx(config->base, false);
314 LPUART_DisableInterrupts(config->base, mask);
315 }
316
mcux_lpuart_irq_rx_full(const struct device * dev)317 static int mcux_lpuart_irq_rx_full(const struct device *dev)
318 {
319 const struct mcux_lpuart_config *config = dev->config;
320 uint32_t flags = LPUART_GetStatusFlags(config->base);
321
322 return (flags & kLPUART_RxDataRegFullFlag) != 0U;
323 }
324
mcux_lpuart_irq_rx_pending(const struct device * dev)325 static int mcux_lpuart_irq_rx_pending(const struct device *dev)
326 {
327 const struct mcux_lpuart_config *config = dev->config;
328 uint32_t mask = kLPUART_RxDataRegFullInterruptEnable;
329
330 return (LPUART_GetEnabledInterrupts(config->base) & mask)
331 && mcux_lpuart_irq_rx_full(dev);
332 }
333
mcux_lpuart_irq_err_enable(const struct device * dev)334 static void mcux_lpuart_irq_err_enable(const struct device *dev)
335 {
336 const struct mcux_lpuart_config *config = dev->config;
337 uint32_t mask = kLPUART_NoiseErrorInterruptEnable |
338 kLPUART_FramingErrorInterruptEnable |
339 kLPUART_ParityErrorInterruptEnable;
340
341 LPUART_EnableInterrupts(config->base, mask);
342 }
343
mcux_lpuart_irq_err_disable(const struct device * dev)344 static void mcux_lpuart_irq_err_disable(const struct device *dev)
345 {
346 const struct mcux_lpuart_config *config = dev->config;
347 uint32_t mask = kLPUART_NoiseErrorInterruptEnable |
348 kLPUART_FramingErrorInterruptEnable |
349 kLPUART_ParityErrorInterruptEnable;
350
351 LPUART_DisableInterrupts(config->base, mask);
352 }
353
mcux_lpuart_irq_is_pending(const struct device * dev)354 static int mcux_lpuart_irq_is_pending(const struct device *dev)
355 {
356 return (mcux_lpuart_irq_tx_ready(dev)
357 || mcux_lpuart_irq_rx_pending(dev));
358 }
359
mcux_lpuart_irq_update(const struct device * dev)360 static int mcux_lpuart_irq_update(const struct device *dev)
361 {
362 return 1;
363 }
364
mcux_lpuart_irq_callback_set(const struct device * dev,uart_irq_callback_user_data_t cb,void * cb_data)365 static void mcux_lpuart_irq_callback_set(const struct device *dev,
366 uart_irq_callback_user_data_t cb,
367 void *cb_data)
368 {
369 struct mcux_lpuart_data *data = dev->data;
370
371 data->callback = cb;
372 data->cb_data = cb_data;
373
374 #if defined(CONFIG_UART_EXCLUSIVE_API_CALLBACKS)
375 data->async.user_callback = NULL;
376 data->async.user_data = NULL;
377 #endif
378 }
379
380 #endif /* CONFIG_UART_INTERRUPT_DRIVEN */
381
382
383 #ifdef CONFIG_UART_ASYNC_API
async_timer_start(struct k_work_delayable * work,size_t timeout_us)384 static inline void async_timer_start(struct k_work_delayable *work, size_t timeout_us)
385 {
386 if ((timeout_us != SYS_FOREVER_US) && (timeout_us != 0)) {
387 LOG_DBG("async timer started for %d us", timeout_us);
388 k_work_reschedule(work, K_USEC(timeout_us));
389 }
390 }
391
async_user_callback(const struct device * dev,struct uart_event * evt)392 static void async_user_callback(const struct device *dev, struct uart_event *evt)
393 {
394 const struct mcux_lpuart_data *data = dev->data;
395
396 if (data->async.user_callback) {
397 data->async.user_callback(dev, evt, data->async.user_data);
398 }
399 }
400
async_evt_tx_done(struct device * dev)401 static void async_evt_tx_done(struct device *dev)
402 {
403 struct mcux_lpuart_data *data = dev->data;
404
405 (void)k_work_cancel_delayable(&data->async.tx_dma_params.timeout_work);
406
407 LOG_DBG("TX done: %d", data->async.tx_dma_params.buf_len);
408 struct uart_event event = {
409 .type = UART_TX_DONE,
410 .data.tx.buf = data->async.tx_dma_params.buf,
411 .data.tx.len = data->async.tx_dma_params.buf_len
412 };
413
414 /* Reset TX Buffer */
415 data->async.tx_dma_params.buf = NULL;
416 data->async.tx_dma_params.buf_len = 0U;
417
418 async_user_callback(dev, &event);
419 }
420
async_evt_rx_rdy(const struct device * dev)421 static void async_evt_rx_rdy(const struct device *dev)
422 {
423 struct mcux_lpuart_data *data = dev->data;
424 struct mcux_lpuart_rx_dma_params *dma_params = &data->async.rx_dma_params;
425
426 struct uart_event event = {
427 .type = UART_RX_RDY,
428 .data.rx.buf = dma_params->buf,
429 .data.rx.len = dma_params->counter - dma_params->offset,
430 .data.rx.offset = dma_params->offset
431 };
432
433 LOG_DBG("RX Ready: (len: %d off: %d buf: %x)", event.data.rx.len, event.data.rx.offset,
434 (uint32_t)event.data.rx.buf);
435
436 /* Update the current pos for new data */
437 dma_params->offset = dma_params->counter;
438
439 /* Only send event for new data */
440 if (event.data.rx.len > 0) {
441 async_user_callback(dev, &event);
442 }
443 }
444
async_evt_rx_buf_request(const struct device * dev)445 static void async_evt_rx_buf_request(const struct device *dev)
446 {
447 struct uart_event evt = {
448 .type = UART_RX_BUF_REQUEST,
449 };
450
451 async_user_callback(dev, &evt);
452 }
453
async_evt_rx_buf_release(const struct device * dev)454 static void async_evt_rx_buf_release(const struct device *dev)
455 {
456 struct mcux_lpuart_data *data = (struct mcux_lpuart_data *)dev->data;
457 struct uart_event evt = {
458 .type = UART_RX_BUF_RELEASED,
459 .data.rx_buf.buf = data->async.rx_dma_params.buf,
460 };
461
462 async_user_callback(dev, &evt);
463 data->async.rx_dma_params.buf = NULL;
464 data->async.rx_dma_params.buf_len = 0U;
465 data->async.rx_dma_params.offset = 0U;
466 data->async.rx_dma_params.counter = 0U;
467 }
468
mcux_lpuart_async_rx_flush(const struct device * dev)469 static void mcux_lpuart_async_rx_flush(const struct device *dev)
470 {
471 struct dma_status status;
472 struct mcux_lpuart_data *data = dev->data;
473 const struct mcux_lpuart_config *config = dev->config;
474
475 const int get_status_result = dma_get_status(config->rx_dma_config.dma_dev,
476 config->rx_dma_config.dma_channel,
477 &status);
478
479 if (get_status_result == 0) {
480 const size_t rx_rcv_len = data->async.rx_dma_params.buf_len -
481 status.pending_length;
482
483 if (rx_rcv_len > data->async.rx_dma_params.counter) {
484 data->async.rx_dma_params.counter = rx_rcv_len;
485 async_evt_rx_rdy(dev);
486 }
487 } else {
488 LOG_ERR("Error getting DMA status");
489 }
490 }
491
mcux_lpuart_rx_disable(const struct device * dev)492 static int mcux_lpuart_rx_disable(const struct device *dev)
493 {
494 LOG_INF("Disabling UART RX DMA");
495 const struct mcux_lpuart_config *config = dev->config;
496 struct mcux_lpuart_data *data = (struct mcux_lpuart_data *)dev->data;
497 LPUART_Type *lpuart = config->base;
498 const unsigned int key = irq_lock();
499
500 LPUART_EnableRx(lpuart, false);
501 (void)k_work_cancel_delayable(&data->async.rx_dma_params.timeout_work);
502 LPUART_DisableInterrupts(lpuart, kLPUART_IdleLineInterruptEnable);
503 LPUART_ClearStatusFlags(lpuart, kLPUART_IdleLineFlag);
504 LPUART_EnableRxDMA(lpuart, false);
505
506 /* No active RX buffer, cannot disable */
507 if (!data->async.rx_dma_params.buf) {
508 LOG_ERR("No buffers to release from RX DMA!");
509 } else {
510 mcux_lpuart_async_rx_flush(dev);
511 async_evt_rx_buf_release(dev);
512 if (data->async.next_rx_buffer != NULL) {
513 data->async.rx_dma_params.buf = data->async.next_rx_buffer;
514 data->async.rx_dma_params.buf_len = data->async.next_rx_buffer_len;
515 data->async.next_rx_buffer = NULL;
516 data->async.next_rx_buffer_len = 0;
517 /* Release the next buffer as well */
518 async_evt_rx_buf_release(dev);
519 }
520 }
521 const int ret = dma_stop(config->rx_dma_config.dma_dev,
522 config->rx_dma_config.dma_channel);
523
524 if (ret != 0) {
525 LOG_ERR("Error stopping rx DMA. Reason: %x", ret);
526 }
527 LOG_DBG("RX: Disabled");
528 struct uart_event disabled_event = {
529 .type = UART_RX_DISABLED
530 };
531
532 async_user_callback(dev, &disabled_event);
533 irq_unlock(key);
534 return ret;
535 }
536
prepare_rx_dma_block_config(const struct device * dev)537 static void prepare_rx_dma_block_config(const struct device *dev)
538 {
539 struct mcux_lpuart_data *data = (struct mcux_lpuart_data *)dev->data;
540 const struct mcux_lpuart_config *config = dev->config;
541 LPUART_Type *lpuart = config->base;
542 struct mcux_lpuart_rx_dma_params *rx_dma_params = &data->async.rx_dma_params;
543
544 assert(rx_dma_params->buf != NULL);
545 assert(rx_dma_params->buf_len > 0);
546
547 struct dma_block_config *head_block_config = &rx_dma_params->active_dma_block;
548
549 head_block_config->dest_address = (uint32_t)rx_dma_params->buf;
550 head_block_config->source_address = LPUART_GetDataRegisterAddress(lpuart);
551 head_block_config->block_size = rx_dma_params->buf_len;
552 head_block_config->dest_scatter_en = true;
553 }
554
configure_and_start_rx_dma(const struct mcux_lpuart_config * config,struct mcux_lpuart_data * data,LPUART_Type * lpuart)555 static int configure_and_start_rx_dma(
556 const struct mcux_lpuart_config *config, struct mcux_lpuart_data *data,
557 LPUART_Type *lpuart)
558 {
559 LOG_DBG("Configuring and Starting UART RX DMA");
560 int ret = dma_config(config->rx_dma_config.dma_dev,
561 config->rx_dma_config.dma_channel,
562 (struct dma_config *)&config->rx_dma_config.dma_cfg);
563
564 if (ret != 0) {
565 LOG_ERR("Failed to Configure RX DMA: err: %d", ret);
566 return ret;
567 }
568 ret = dma_start(config->rx_dma_config.dma_dev, config->rx_dma_config.dma_channel);
569 if (ret < 0) {
570 LOG_ERR("Failed to start DMA(Rx) Ch %d(%d)",
571 config->rx_dma_config.dma_channel,
572 ret);
573 }
574 LPUART_EnableRxDMA(lpuart, true);
575 return ret;
576 }
577
uart_mcux_lpuart_dma_replace_rx_buffer(const struct device * dev)578 static int uart_mcux_lpuart_dma_replace_rx_buffer(const struct device *dev)
579 {
580 struct mcux_lpuart_data *data = (struct mcux_lpuart_data *)dev->data;
581 const struct mcux_lpuart_config *config = dev->config;
582 LPUART_Type *lpuart = config->base;
583
584 LOG_DBG("Replacing RX buffer, new length: %d", data->async.next_rx_buffer_len);
585 /* There must be a buffer to replace this one with */
586 assert(data->async.next_rx_buffer != NULL);
587 assert(data->async.next_rx_buffer_len != 0U);
588 const int success = dma_reload(config->rx_dma_config.dma_dev,
589 config->rx_dma_config.dma_channel,
590 LPUART_GetDataRegisterAddress(lpuart),
591 (uint32_t)data->async.next_rx_buffer,
592 data->async.next_rx_buffer_len);
593
594 if (success != 0) {
595 LOG_ERR("Error %d reloading DMA with next RX buffer", success);
596 }
597 return success;
598 }
599
dma_callback(const struct device * dma_dev,void * callback_arg,uint32_t channel,int dma_status)600 static void dma_callback(const struct device *dma_dev, void *callback_arg, uint32_t channel,
601 int dma_status)
602 {
603 struct device *dev = (struct device *)callback_arg;
604 const struct mcux_lpuart_config *config = dev->config;
605 LPUART_Type *lpuart = config->base;
606 struct mcux_lpuart_data *data = (struct mcux_lpuart_data *)dev->data;
607
608 LOG_DBG("DMA call back on channel %d", channel);
609 struct dma_status status;
610 const int get_status_result = dma_get_status(dma_dev, channel, &status);
611
612 if (get_status_result < 0) {
613 LOG_ERR("error on status get: %d", get_status_result);
614 } else {
615 LOG_DBG("DMA Status: b: %d dir: %d len_remain: %d", status.busy, status.dir,
616 status.pending_length);
617 }
618
619 if (dma_status < 0) {
620 LOG_ERR("Got error : %d", dma_status);
621 }
622
623
624 if (channel == config->tx_dma_config.dma_channel) {
625 LOG_DBG("TX Channel");
626 LPUART_EnableTxDMA(lpuart, false);
627 async_evt_tx_done(dev);
628 } else if (channel == config->rx_dma_config.dma_channel) {
629 LOG_DBG("RX Channel");
630 struct mcux_lpuart_rx_dma_params *rx_dma_params = &data->async.rx_dma_params;
631
632 /* The RX Event indicates DMA transfer is complete and full buffer is available. */
633 rx_dma_params->counter = rx_dma_params->buf_len;
634
635 LOG_DBG("Current Buf (%x) full, swapping to new buf: %x",
636 (uint32_t)rx_dma_params->buf,
637 (uint32_t)data->async.next_rx_buffer);
638 async_evt_rx_rdy(dev);
639 async_evt_rx_buf_release(dev);
640
641 rx_dma_params->buf = data->async.next_rx_buffer;
642 rx_dma_params->buf_len = data->async.next_rx_buffer_len;
643 data->async.next_rx_buffer = NULL;
644 data->async.next_rx_buffer_len = 0U;
645
646 /* A new buffer was available (and already loaded into the DMA engine) */
647 if (rx_dma_params->buf != NULL &&
648 rx_dma_params->buf_len > 0) {
649 /* Request the next buffer */
650 async_evt_rx_buf_request(dev);
651 } else {
652 /* Buffer full without valid next buffer, disable RX DMA */
653 LOG_INF("Disabled RX DMA, no valid next buffer ");
654 mcux_lpuart_rx_disable(dev);
655 }
656 } else {
657 LOG_ERR("Got unexpected DMA Channel: %d", channel);
658 }
659 }
660
mcux_lpuart_callback_set(const struct device * dev,uart_callback_t callback,void * user_data)661 static int mcux_lpuart_callback_set(const struct device *dev, uart_callback_t callback,
662 void *user_data)
663 {
664 struct mcux_lpuart_data *data = dev->data;
665
666 data->async.user_callback = callback;
667 data->async.user_data = user_data;
668
669 #if defined(CONFIG_UART_EXCLUSIVE_API_CALLBACKS)
670 data->callback = NULL;
671 data->cb_data = NULL;
672 #endif
673
674 return 0;
675 }
676
mcux_lpuart_tx(const struct device * dev,const uint8_t * buf,size_t len,int32_t timeout_us)677 static int mcux_lpuart_tx(const struct device *dev, const uint8_t *buf, size_t len,
678 int32_t timeout_us)
679 {
680 struct mcux_lpuart_data *data = dev->data;
681 const struct mcux_lpuart_config *config = dev->config;
682 LPUART_Type *lpuart = config->base;
683
684 unsigned int key = irq_lock();
685
686 /* Check for an ongiong transfer and abort if it is pending */
687 struct dma_status status;
688 const int get_status_result = dma_get_status(config->tx_dma_config.dma_dev,
689 config->tx_dma_config.dma_channel,
690 &status);
691
692 if (get_status_result < 0 || status.busy) {
693 irq_unlock(key);
694 LOG_ERR("Unable to submit UART DMA Transfer.");
695 return get_status_result < 0 ? get_status_result : -EBUSY;
696 }
697
698 int ret;
699
700 LPUART_EnableTxDMA(lpuart, false);
701
702 data->async.tx_dma_params.buf = buf;
703 data->async.tx_dma_params.buf_len = len;
704 data->async.tx_dma_params.active_dma_block.source_address = (uint32_t)buf;
705 data->async.tx_dma_params.active_dma_block.dest_address =
706 LPUART_GetDataRegisterAddress(lpuart);
707 data->async.tx_dma_params.active_dma_block.block_size = len;
708 data->async.tx_dma_params.active_dma_block.next_block = NULL;
709
710 ret = dma_config(config->tx_dma_config.dma_dev,
711 config->tx_dma_config.dma_channel,
712 (struct dma_config *)&config->tx_dma_config.dma_cfg);
713
714 if (ret == 0) {
715 LOG_DBG("Starting UART DMA TX Ch %u", config->tx_dma_config.dma_channel);
716
717 ret = dma_start(config->tx_dma_config.dma_dev,
718 config->tx_dma_config.dma_channel);
719 LPUART_EnableTxDMA(lpuart, true);
720 if (ret != 0) {
721 LOG_ERR("Failed to start DMA(Tx) Ch %d",
722 config->tx_dma_config.dma_channel);
723 }
724 async_timer_start(&data->async.tx_dma_params.timeout_work, timeout_us);
725 } else {
726 LOG_ERR("Error configuring UART DMA: %x", ret);
727 }
728 irq_unlock(key);
729 return ret;
730 }
731
mcux_lpuart_tx_abort(const struct device * dev)732 static int mcux_lpuart_tx_abort(const struct device *dev)
733 {
734 struct mcux_lpuart_data *data = dev->data;
735 const struct mcux_lpuart_config *config = dev->config;
736 LPUART_Type *lpuart = config->base;
737
738 LPUART_EnableTxDMA(lpuart, false);
739 (void)k_work_cancel_delayable(&data->async.tx_dma_params.timeout_work);
740 struct dma_status status;
741 const int get_status_result = dma_get_status(config->tx_dma_config.dma_dev,
742 config->tx_dma_config.dma_channel,
743 &status);
744
745 if (get_status_result < 0) {
746 LOG_ERR("Error querying TX DMA Status during abort.");
747 }
748
749 const size_t bytes_transmitted = (get_status_result == 0) ?
750 data->async.tx_dma_params.buf_len - status.pending_length : 0;
751
752 const int ret = dma_stop(config->tx_dma_config.dma_dev, config->tx_dma_config.dma_channel);
753
754 if (ret == 0) {
755 struct uart_event tx_aborted_event = {
756 .type = UART_TX_ABORTED,
757 .data.tx.buf = data->async.tx_dma_params.buf,
758 .data.tx.len = bytes_transmitted
759 };
760 async_user_callback(dev, &tx_aborted_event);
761 }
762 return ret;
763 }
764
mcux_lpuart_rx_enable(const struct device * dev,uint8_t * buf,const size_t len,const int32_t timeout_us)765 static int mcux_lpuart_rx_enable(const struct device *dev, uint8_t *buf, const size_t len,
766 const int32_t timeout_us)
767 {
768 LOG_DBG("Enabling UART RX DMA");
769 struct mcux_lpuart_data *data = dev->data;
770 const struct mcux_lpuart_config *config = dev->config;
771 LPUART_Type *lpuart = config->base;
772
773 struct mcux_lpuart_rx_dma_params *rx_dma_params = &data->async.rx_dma_params;
774
775 unsigned int key = irq_lock();
776 struct dma_status status;
777 const int get_status_result = dma_get_status(config->rx_dma_config.dma_dev,
778 config->rx_dma_config.dma_channel,
779 &status);
780
781 if (get_status_result < 0 || status.busy) {
782 LOG_ERR("Unable to start receive on UART.");
783 irq_unlock(key);
784 return get_status_result < 0 ? get_status_result : -EBUSY;
785 }
786
787 rx_dma_params->timeout_us = timeout_us;
788 rx_dma_params->buf = buf;
789 rx_dma_params->buf_len = len;
790
791 LPUART_EnableInterrupts(config->base, kLPUART_IdleLineInterruptEnable);
792 prepare_rx_dma_block_config(dev);
793 const int ret = configure_and_start_rx_dma(config, data, lpuart);
794
795 /* Request the next buffer for when this buffer is full for continuous reception */
796 async_evt_rx_buf_request(dev);
797
798 /* Clear these status flags as they can prevent the UART device from receiving data */
799 LPUART_ClearStatusFlags(config->base, kLPUART_RxOverrunFlag |
800 kLPUART_ParityErrorFlag |
801 kLPUART_FramingErrorFlag |
802 kLPUART_NoiseErrorFlag);
803 LPUART_EnableRx(lpuart, true);
804 irq_unlock(key);
805 return ret;
806 }
807
mcux_lpuart_rx_buf_rsp(const struct device * dev,uint8_t * buf,size_t len)808 static int mcux_lpuart_rx_buf_rsp(const struct device *dev, uint8_t *buf, size_t len)
809 {
810 struct mcux_lpuart_data *data = dev->data;
811
812 assert(data->async.next_rx_buffer == NULL);
813 assert(data->async.next_rx_buffer_len == 0);
814 data->async.next_rx_buffer = buf;
815 data->async.next_rx_buffer_len = len;
816 uart_mcux_lpuart_dma_replace_rx_buffer(dev);
817
818 return 0;
819 }
820
mcux_lpuart_async_rx_timeout(struct k_work * work)821 static void mcux_lpuart_async_rx_timeout(struct k_work *work)
822 {
823 struct k_work_delayable *dwork = k_work_delayable_from_work(work);
824 struct mcux_lpuart_rx_dma_params *rx_params = CONTAINER_OF(dwork,
825 struct mcux_lpuart_rx_dma_params,
826 timeout_work);
827 struct mcux_lpuart_async_data *async_data = CONTAINER_OF(rx_params,
828 struct mcux_lpuart_async_data,
829 rx_dma_params);
830 const struct device *dev = async_data->uart_dev;
831
832 LOG_DBG("RX timeout");
833 mcux_lpuart_async_rx_flush(dev);
834 }
835
mcux_lpuart_async_tx_timeout(struct k_work * work)836 static void mcux_lpuart_async_tx_timeout(struct k_work *work)
837 {
838 struct k_work_delayable *dwork = k_work_delayable_from_work(work);
839 struct mcux_lpuart_tx_dma_params *tx_params = CONTAINER_OF(dwork,
840 struct mcux_lpuart_tx_dma_params,
841 timeout_work);
842 struct mcux_lpuart_async_data *async_data = CONTAINER_OF(tx_params,
843 struct mcux_lpuart_async_data,
844 tx_dma_params);
845 const struct device *dev = async_data->uart_dev;
846
847 LOG_DBG("TX timeout");
848 (void)mcux_lpuart_tx_abort(dev);
849 }
850
851 #endif /* CONFIG_UART_ASYNC_API */
852
853 #if CONFIG_UART_MCUX_LPUART_ISR_SUPPORT
mcux_lpuart_isr(const struct device * dev)854 static void mcux_lpuart_isr(const struct device *dev)
855 {
856 struct mcux_lpuart_data *data = dev->data;
857 const struct mcux_lpuart_config *config = dev->config;
858 const uint32_t status = LPUART_GetStatusFlags(config->base);
859
860 #if CONFIG_PM
861 if (status & kLPUART_TransmissionCompleteFlag) {
862
863 if (data->tx_poll_stream_on) {
864 /* Poll transmission complete. Allow system to sleep */
865 LPUART_DisableInterrupts(config->base,
866 kLPUART_TransmissionCompleteInterruptEnable);
867 data->tx_poll_stream_on = false;
868 mcux_lpuart_pm_policy_state_lock_put(dev);
869 }
870 }
871 #endif /* CONFIG_PM */
872
873 #if CONFIG_UART_INTERRUPT_DRIVEN
874 if (data->callback) {
875 data->callback(dev, data->cb_data);
876 }
877
878 if (status & kLPUART_RxOverrunFlag) {
879 LPUART_ClearStatusFlags(config->base, kLPUART_RxOverrunFlag);
880 }
881 #endif
882
883 #if CONFIG_UART_ASYNC_API
884 if (status & kLPUART_IdleLineFlag) {
885 async_timer_start(&data->async.rx_dma_params.timeout_work,
886 data->async.rx_dma_params.timeout_us);
887 LPUART_ClearStatusFlags(config->base, kLPUART_IdleLineFlag);
888 }
889 #endif /* CONFIG_UART_ASYNC_API */
890 }
891 #endif /* CONFIG_UART_MCUX_LPUART_ISR_SUPPORT */
892
mcux_lpuart_configure_init(const struct device * dev,const struct uart_config * cfg)893 static int mcux_lpuart_configure_init(const struct device *dev, const struct uart_config *cfg)
894 {
895 const struct mcux_lpuart_config *config = dev->config;
896 struct mcux_lpuart_data *data = dev->data;
897 uint32_t clock_freq;
898
899 if (!device_is_ready(config->clock_dev)) {
900 return -ENODEV;
901 }
902
903 if (clock_control_get_rate(config->clock_dev, config->clock_subsys,
904 &clock_freq)) {
905 return -EINVAL;
906 }
907
908 lpuart_config_t uart_config;
909 LPUART_GetDefaultConfig(&uart_config);
910
911 /* Translate UART API enum to LPUART enum from HAL */
912 switch (cfg->parity) {
913 case UART_CFG_PARITY_NONE:
914 uart_config.parityMode = kLPUART_ParityDisabled;
915 break;
916 case UART_CFG_PARITY_ODD:
917 uart_config.parityMode = kLPUART_ParityOdd;
918 break;
919 case UART_CFG_PARITY_EVEN:
920 uart_config.parityMode = kLPUART_ParityEven;
921 break;
922 default:
923 return -ENOTSUP;
924 }
925
926 switch (cfg->data_bits) {
927 #if defined(FSL_FEATURE_LPUART_HAS_7BIT_DATA_SUPPORT) && \
928 FSL_FEATURE_LPUART_HAS_7BIT_DATA_SUPPORT
929 case UART_CFG_DATA_BITS_7:
930 uart_config.dataBitsCount = kLPUART_SevenDataBits;
931 break;
932 #endif
933 case UART_CFG_DATA_BITS_8:
934 uart_config.dataBitsCount = kLPUART_EightDataBits;
935 break;
936 default:
937 return -ENOTSUP;
938 }
939
940 #if defined(FSL_FEATURE_LPUART_HAS_STOP_BIT_CONFIG_SUPPORT) && \
941 FSL_FEATURE_LPUART_HAS_STOP_BIT_CONFIG_SUPPORT
942 switch (cfg->stop_bits) {
943 case UART_CFG_STOP_BITS_1:
944 uart_config.stopBitCount = kLPUART_OneStopBit;
945 break;
946 case UART_CFG_STOP_BITS_2:
947 uart_config.stopBitCount = kLPUART_TwoStopBit;
948 break;
949 default:
950 return -ENOTSUP;
951 }
952 #endif
953
954 #if defined(FSL_FEATURE_LPUART_HAS_MODEM_SUPPORT) && \
955 FSL_FEATURE_LPUART_HAS_MODEM_SUPPORT
956 switch (cfg->flow_ctrl) {
957 case UART_CFG_FLOW_CTRL_NONE:
958 case UART_CFG_FLOW_CTRL_RS485:
959 uart_config.enableTxCTS = false;
960 uart_config.enableRxRTS = false;
961 break;
962 case UART_CFG_FLOW_CTRL_RTS_CTS:
963 uart_config.enableTxCTS = true;
964 uart_config.enableRxRTS = true;
965 break;
966 default:
967 return -ENOTSUP;
968 }
969 #endif
970
971 uart_config.baudRate_Bps = cfg->baudrate;
972 uart_config.enableRx = true;
973 /* Tx will be enabled manually after set tx-rts */
974 uart_config.enableTx = false;
975
976
977 #ifdef CONFIG_UART_ASYNC_API
978 uart_config.rxIdleType = kLPUART_IdleTypeStopBit;
979 uart_config.rxIdleConfig = kLPUART_IdleCharacter1;
980 data->async.next_rx_buffer = NULL;
981 data->async.next_rx_buffer_len = 0;
982 data->async.uart_dev = dev;
983 k_work_init_delayable(&data->async.rx_dma_params.timeout_work,
984 mcux_lpuart_async_rx_timeout);
985 k_work_init_delayable(&data->async.tx_dma_params.timeout_work,
986 mcux_lpuart_async_tx_timeout);
987
988 /* Disable the UART Receiver until the async API provides a buffer to
989 * to receive into with rx_enable
990 */
991 uart_config.enableRx = false;
992
993 #endif /* CONFIG_UART_ASYNC_API */
994
995 LPUART_Init(config->base, &uart_config, clock_freq);
996
997 if (cfg->flow_ctrl == UART_CFG_FLOW_CTRL_RS485) {
998 /* Set the LPUART into RS485 mode (tx driver enable using RTS) */
999 config->base->MODIR |= LPUART_MODIR_TXRTSE(true);
1000 if (!config->rs485_de_active_low) {
1001 config->base->MODIR |= LPUART_MODIR_TXRTSPOL(1);
1002 }
1003 }
1004 /* Now can enable tx */
1005 config->base->CTRL |= LPUART_CTRL_TE(true);
1006
1007
1008 if (config->loopback_en) {
1009 /* Set the LPUART into loopback mode */
1010 config->base->CTRL |= LPUART_CTRL_LOOPS_MASK;
1011 config->base->CTRL &= ~LPUART_CTRL_RSRC_MASK;
1012 }
1013
1014 /* update internal uart_config */
1015 data->uart_config = *cfg;
1016
1017 return 0;
1018 }
1019
1020 #ifdef CONFIG_UART_USE_RUNTIME_CONFIGURE
mcux_lpuart_config_get(const struct device * dev,struct uart_config * cfg)1021 static int mcux_lpuart_config_get(const struct device *dev, struct uart_config *cfg)
1022 {
1023 struct mcux_lpuart_data *data = dev->data;
1024 *cfg = data->uart_config;
1025 return 0;
1026 }
1027
mcux_lpuart_configure(const struct device * dev,const struct uart_config * cfg)1028 static int mcux_lpuart_configure(const struct device *dev,
1029 const struct uart_config *cfg)
1030 {
1031 const struct mcux_lpuart_config *config = dev->config;
1032
1033 /* disable LPUART */
1034 LPUART_Deinit(config->base);
1035
1036 int ret = mcux_lpuart_configure_init(dev, cfg);
1037 if (ret) {
1038 return ret;
1039 }
1040
1041 /* wait for hardware init */
1042 k_sleep(K_MSEC(1));
1043
1044 return 0;
1045 }
1046 #endif /* CONFIG_UART_USE_RUNTIME_CONFIGURE */
1047
mcux_lpuart_init(const struct device * dev)1048 static int mcux_lpuart_init(const struct device *dev)
1049 {
1050 const struct mcux_lpuart_config *config = dev->config;
1051 struct mcux_lpuart_data *data = dev->data;
1052 struct uart_config *uart_api_config = &data->uart_config;
1053 int err;
1054
1055 uart_api_config->baudrate = config->baud_rate;
1056 uart_api_config->parity = config->parity;
1057 uart_api_config->stop_bits = UART_CFG_STOP_BITS_1;
1058 uart_api_config->data_bits = UART_CFG_DATA_BITS_8;
1059 uart_api_config->flow_ctrl = config->flow_ctrl;
1060
1061 /* set initial configuration */
1062 mcux_lpuart_configure_init(dev, uart_api_config);
1063 err = pinctrl_apply_state(config->pincfg, PINCTRL_STATE_DEFAULT);
1064 if (err < 0) {
1065 return err;
1066 }
1067
1068 #ifdef CONFIG_UART_MCUX_LPUART_ISR_SUPPORT
1069 config->irq_config_func(dev);
1070 #endif
1071
1072 #ifdef CONFIG_PM
1073 data->pm_state_lock_on = false;
1074 data->tx_poll_stream_on = false;
1075 data->tx_int_stream_on = false;
1076 #endif
1077
1078 return 0;
1079 }
1080
1081 static const struct uart_driver_api mcux_lpuart_driver_api = {
1082 .poll_in = mcux_lpuart_poll_in,
1083 .poll_out = mcux_lpuart_poll_out,
1084 .err_check = mcux_lpuart_err_check,
1085 #ifdef CONFIG_UART_USE_RUNTIME_CONFIGURE
1086 .configure = mcux_lpuart_configure,
1087 .config_get = mcux_lpuart_config_get,
1088 #endif
1089 #ifdef CONFIG_UART_INTERRUPT_DRIVEN
1090 .fifo_fill = mcux_lpuart_fifo_fill,
1091 .fifo_read = mcux_lpuart_fifo_read,
1092 .irq_tx_enable = mcux_lpuart_irq_tx_enable,
1093 .irq_tx_disable = mcux_lpuart_irq_tx_disable,
1094 .irq_tx_complete = mcux_lpuart_irq_tx_complete,
1095 .irq_tx_ready = mcux_lpuart_irq_tx_ready,
1096 .irq_rx_enable = mcux_lpuart_irq_rx_enable,
1097 .irq_rx_disable = mcux_lpuart_irq_rx_disable,
1098 .irq_rx_ready = mcux_lpuart_irq_rx_full,
1099 .irq_err_enable = mcux_lpuart_irq_err_enable,
1100 .irq_err_disable = mcux_lpuart_irq_err_disable,
1101 .irq_is_pending = mcux_lpuart_irq_is_pending,
1102 .irq_update = mcux_lpuart_irq_update,
1103 .irq_callback_set = mcux_lpuart_irq_callback_set,
1104 #endif
1105 #ifdef CONFIG_UART_ASYNC_API
1106 .callback_set = mcux_lpuart_callback_set,
1107 .tx = mcux_lpuart_tx,
1108 .tx_abort = mcux_lpuart_tx_abort,
1109 .rx_enable = mcux_lpuart_rx_enable,
1110 .rx_buf_rsp = mcux_lpuart_rx_buf_rsp,
1111 .rx_disable = mcux_lpuart_rx_disable,
1112 #endif /* CONFIG_UART_ASYNC_API */
1113 };
1114
1115
1116 #ifdef CONFIG_UART_MCUX_LPUART_ISR_SUPPORT
1117 #define MCUX_LPUART_IRQ_INSTALL(n, i) \
1118 do { \
1119 IRQ_CONNECT(DT_INST_IRQ_BY_IDX(n, i, irq), \
1120 DT_INST_IRQ_BY_IDX(n, i, priority), \
1121 mcux_lpuart_isr, DEVICE_DT_INST_GET(n), 0); \
1122 \
1123 irq_enable(DT_INST_IRQ_BY_IDX(n, i, irq)); \
1124 } while (false)
1125 #define MCUX_LPUART_IRQ_INIT(n) .irq_config_func = mcux_lpuart_config_func_##n,
1126 #define MCUX_LPUART_IRQ_DEFINE(n) \
1127 static void mcux_lpuart_config_func_##n(const struct device *dev) \
1128 { \
1129 MCUX_LPUART_IRQ_INSTALL(n, 0); \
1130 \
1131 IF_ENABLED(DT_INST_IRQ_HAS_IDX(n, 1), \
1132 (MCUX_LPUART_IRQ_INSTALL(n, 1);)) \
1133 }
1134 #else
1135 #define MCUX_LPUART_IRQ_INIT(n)
1136 #define MCUX_LPUART_IRQ_DEFINE(n)
1137 #endif /* CONFIG_UART_MCUX_LPUART_ISR_SUPPORT */
1138
1139 #ifdef CONFIG_UART_ASYNC_API
1140 #define TX_DMA_CONFIG(id) \
1141 .tx_dma_config = { \
1142 .dma_dev = \
1143 DEVICE_DT_GET(DT_INST_DMAS_CTLR_BY_NAME(id, tx)), \
1144 .dma_channel = \
1145 DT_INST_DMAS_CELL_BY_NAME(id, tx, mux), \
1146 .dma_cfg = { \
1147 .source_burst_length = 1, \
1148 .dest_burst_length = 1, \
1149 .source_data_size = 1, \
1150 .dest_data_size = 1, \
1151 .complete_callback_en = 1, \
1152 .error_callback_en = 1, \
1153 .block_count = 1, \
1154 .head_block = \
1155 &mcux_lpuart_##id##_data.async.tx_dma_params.active_dma_block, \
1156 .channel_direction = MEMORY_TO_PERIPHERAL, \
1157 .dma_slot = DT_INST_DMAS_CELL_BY_NAME( \
1158 id, tx, source), \
1159 .dma_callback = dma_callback, \
1160 .user_data = (void *)DEVICE_DT_INST_GET(id) \
1161 }, \
1162 },
1163 #define RX_DMA_CONFIG(id) \
1164 .rx_dma_config = { \
1165 .dma_dev = \
1166 DEVICE_DT_GET(DT_INST_DMAS_CTLR_BY_NAME(id, rx)), \
1167 .dma_channel = \
1168 DT_INST_DMAS_CELL_BY_NAME(id, rx, mux), \
1169 .dma_cfg = { \
1170 .source_burst_length = 1, \
1171 .dest_burst_length = 1, \
1172 .source_data_size = 1, \
1173 .dest_data_size = 1, \
1174 .complete_callback_en = 1, \
1175 .error_callback_en = 1, \
1176 .block_count = 1, \
1177 .head_block = \
1178 &mcux_lpuart_##id##_data.async.rx_dma_params.active_dma_block, \
1179 .channel_direction = PERIPHERAL_TO_MEMORY, \
1180 .dma_slot = DT_INST_DMAS_CELL_BY_NAME( \
1181 id, rx, source), \
1182 .dma_callback = dma_callback, \
1183 .user_data = (void *)DEVICE_DT_INST_GET(id) \
1184 }, \
1185 },
1186 #else
1187 #define RX_DMA_CONFIG(n)
1188 #define TX_DMA_CONFIG(n)
1189 #endif /* CONFIG_UART_ASYNC_API */
1190
1191 #define FLOW_CONTROL(n) \
1192 DT_INST_PROP(n, hw_flow_control) \
1193 ? UART_CFG_FLOW_CTRL_RTS_CTS \
1194 : DT_INST_PROP(n, nxp_rs485_mode)\
1195 ? UART_CFG_FLOW_CTRL_RS485 \
1196 : UART_CFG_FLOW_CTRL_NONE
1197
1198 #define LPUART_MCUX_DECLARE_CFG(n) \
1199 static const struct mcux_lpuart_config mcux_lpuart_##n##_config = { \
1200 .base = (LPUART_Type *) DT_INST_REG_ADDR(n), \
1201 .clock_dev = DEVICE_DT_GET(DT_INST_CLOCKS_CTLR(n)), \
1202 .clock_subsys = (clock_control_subsys_t)DT_INST_CLOCKS_CELL(n, name), \
1203 .baud_rate = DT_INST_PROP(n, current_speed), \
1204 .flow_ctrl = FLOW_CONTROL(n), \
1205 .parity = DT_INST_ENUM_IDX_OR(n, parity, UART_CFG_PARITY_NONE), \
1206 .rs485_de_active_low = DT_INST_PROP(n, nxp_rs485_de_active_low), \
1207 .loopback_en = DT_INST_PROP(n, nxp_loopback), \
1208 .pincfg = PINCTRL_DT_INST_DEV_CONFIG_GET(n), \
1209 MCUX_LPUART_IRQ_INIT(n) \
1210 RX_DMA_CONFIG(n) \
1211 TX_DMA_CONFIG(n) \
1212 };
1213
1214 #define LPUART_MCUX_INIT(n) \
1215 \
1216 static struct mcux_lpuart_data mcux_lpuart_##n##_data; \
1217 \
1218 PINCTRL_DT_INST_DEFINE(n); \
1219 MCUX_LPUART_IRQ_DEFINE(n) \
1220 \
1221 LPUART_MCUX_DECLARE_CFG(n) \
1222 \
1223 DEVICE_DT_INST_DEFINE(n, \
1224 &mcux_lpuart_init, \
1225 NULL, \
1226 &mcux_lpuart_##n##_data, \
1227 &mcux_lpuart_##n##_config, \
1228 PRE_KERNEL_1, \
1229 CONFIG_SERIAL_INIT_PRIORITY, \
1230 &mcux_lpuart_driver_api); \
1231
1232 DT_INST_FOREACH_STATUS_OKAY(LPUART_MCUX_INIT)
1233
