Line data    Source code

       1           0 : /*
       2             :  * Copyright (c) 2022 Trackunit Corporation
       3             :  *
       4             :  * SPDX-License-Identifier: Apache-2.0
       5             :  */
       6             : 
       7             : #include <zephyr/kernel.h>
       8             : #include <zephyr/types.h>
       9             : #include <zephyr/device.h>
      10             : #include <zephyr/drivers/uart.h>
      11             : #include <zephyr/sys/ring_buffer.h>
      12             : #include <zephyr/sys/atomic.h>
      13             : 
      14             : #include <zephyr/modem/pipe.h>
      15             : #include <zephyr/modem/stats.h>
      16             : 
      17             : #ifndef ZEPHYR_MODEM_BACKEND_UART_
      18           0 : #define ZEPHYR_MODEM_BACKEND_UART_
      19             : 
      20             : #ifdef __cplusplus
      21             : extern "C" {
      22             : #endif
      23             : 
      24           0 : struct modem_backend_uart_isr {
      25           0 :         struct ring_buf receive_rdb[2];
      26           0 :         struct ring_buf transmit_rb;
      27           0 :         atomic_t transmit_buf_len;
      28           0 :         atomic_t receive_buf_len;
      29           0 :         uint8_t receive_rdb_used;
      30           0 :         uint32_t transmit_buf_put_limit;
      31             : };
      32             : 
      33           0 : struct modem_backend_uart_async {
      34           0 :         uint8_t *receive_bufs[2];
      35           0 :         uint32_t receive_buf_size;
      36           0 :         struct ring_buf receive_rb;
      37           0 :         struct k_spinlock receive_rb_lock;
      38           0 :         uint8_t *transmit_buf;
      39           0 :         uint32_t transmit_buf_size;
      40           0 :         struct k_work rx_disabled_work;
      41           0 :         atomic_t state;
      42             : };
      43             : 
      44           0 : struct modem_backend_uart {
      45           0 :         const struct device *uart;
      46           0 :         struct modem_pipe pipe;
      47           0 :         struct k_work_delayable receive_ready_work;
      48           0 :         struct k_work transmit_idle_work;
      49             : 
      50             : #if CONFIG_MODEM_STATS
      51             :         struct modem_stats_buffer receive_buf_stats;
      52             :         struct modem_stats_buffer transmit_buf_stats;
      53             : #endif
      54             : 
      55             :         union {
      56           0 :                 struct modem_backend_uart_isr isr;
      57           0 :                 struct modem_backend_uart_async async;
      58           0 :         };
      59             : };
      60             : 
      61           0 : struct modem_backend_uart_config {
      62           0 :         const struct device *uart;
      63           0 :         uint8_t *receive_buf;
      64           0 :         uint32_t receive_buf_size;
      65           0 :         uint8_t *transmit_buf;
      66           0 :         uint32_t transmit_buf_size;
      67             : };
      68             : 
      69           0 : struct modem_pipe *modem_backend_uart_init(struct modem_backend_uart *backend,
      70             :                                            const struct modem_backend_uart_config *config);
      71             : 
      72             : #ifdef __cplusplus
      73             : }
      74             : #endif
      75             : 
      76             : #endif /* ZEPHYR_MODEM_BACKEND_UART_ */