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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 | /* * Copyright (c) 2015, Freescale Semiconductor, Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * * o Redistributions of source code must retain the above copyright notice, this list * of conditions and the following disclaimer. * * o Redistributions in binary form must reproduce the above copyright notice, this * list of conditions and the following disclaimer in the documentation and/or * other materials provided with the distribution. * * o Neither the name of Freescale Semiconductor, Inc. nor the names of its * contributors may be used to endorse or promote products derived from this * software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "fsl_lpuart_edma.h" #include "fsl_dmamux.h" /******************************************************************************* * Definitions ******************************************************************************/ /*<! Structure definition for lpuart_edma_private_handle_t. The structure is private. */ typedef struct _lpuart_edma_private_handle { LPUART_Type *base; lpuart_edma_handle_t *handle; } lpuart_edma_private_handle_t; /* LPUART EDMA transfer handle. */ enum _lpuart_edma_tansfer_states { kLPUART_TxIdle, /* TX idle. */ kLPUART_TxBusy, /* TX busy. */ kLPUART_RxIdle, /* RX idle. */ kLPUART_RxBusy /* RX busy. */ }; /******************************************************************************* * Definitions ******************************************************************************/ /*<! Private handle only used for internally. */ static lpuart_edma_private_handle_t s_edmaPrivateHandle[FSL_FEATURE_SOC_LPUART_COUNT]; /******************************************************************************* * Prototypes ******************************************************************************/ /*! * @brief LPUART EDMA send finished callback function. * * This function is called when LPUART EDMA send finished. It disables the LPUART * TX EDMA request and sends @ref kStatus_LPUART_TxIdle to LPUART callback. * * @param handle The EDMA handle. * @param param Callback function parameter. */ static void LPUART_SendEDMACallback(edma_handle_t *handle, void *param, bool transferDone, uint32_t tcds); /*! * @brief LPUART EDMA receive finished callback function. * * This function is called when LPUART EDMA receive finished. It disables the LPUART * RX EDMA request and sends @ref kStatus_LPUART_RxIdle to LPUART callback. * * @param handle The EDMA handle. * @param param Callback function parameter. */ static void LPUART_ReceiveEDMACallback(edma_handle_t *handle, void *param, bool transferDone, uint32_t tcds); /*! * @brief Get the LPUART instance from peripheral base address. * * @param base LPUART peripheral base address. * @return LPUART instance. */ extern uint32_t LPUART_GetInstance(LPUART_Type *base); /******************************************************************************* * Code ******************************************************************************/ static void LPUART_SendEDMACallback(edma_handle_t *handle, void *param, bool transferDone, uint32_t tcds) { lpuart_edma_private_handle_t *lpuartPrivateHandle = (lpuart_edma_private_handle_t *)param; /* Avoid the warning for unused variables. */ handle = handle; tcds = tcds; if (transferDone) { LPUART_TransferAbortSendEDMA(lpuartPrivateHandle->base, lpuartPrivateHandle->handle); if (lpuartPrivateHandle->handle->callback) { lpuartPrivateHandle->handle->callback(lpuartPrivateHandle->base, lpuartPrivateHandle->handle, kStatus_LPUART_TxIdle, lpuartPrivateHandle->handle->userData); } } } static void LPUART_ReceiveEDMACallback(edma_handle_t *handle, void *param, bool transferDone, uint32_t tcds) { lpuart_edma_private_handle_t *lpuartPrivateHandle = (lpuart_edma_private_handle_t *)param; /* Avoid warning for unused parameters. */ handle = handle; tcds = tcds; if (transferDone) { /* Disable transfer. */ LPUART_TransferAbortReceiveEDMA(lpuartPrivateHandle->base, lpuartPrivateHandle->handle); if (lpuartPrivateHandle->handle->callback) { lpuartPrivateHandle->handle->callback(lpuartPrivateHandle->base, lpuartPrivateHandle->handle, kStatus_LPUART_RxIdle, lpuartPrivateHandle->handle->userData); } } } void LPUART_TransferCreateHandleEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle, lpuart_edma_transfer_callback_t callback, void *userData, edma_handle_t *txEdmaHandle, edma_handle_t *rxEdmaHandle) { assert(handle); uint32_t instance = LPUART_GetInstance(base); s_edmaPrivateHandle[instance].base = base; s_edmaPrivateHandle[instance].handle = handle; memset(handle, 0, sizeof(*handle)); handle->rxState = kLPUART_RxIdle; handle->txState = kLPUART_TxIdle; handle->rxEdmaHandle = rxEdmaHandle; handle->txEdmaHandle = txEdmaHandle; handle->callback = callback; handle->userData = userData; #if defined(FSL_FEATURE_LPUART_HAS_FIFO) && FSL_FEATURE_LPUART_HAS_FIFO /* Note: Take care of the RX FIFO, EDMA request only assert when received bytes equal or more than RX water mark, there is potential issue if RX water mark larger than 1. For example, if RX FIFO water mark is 2, upper layer needs 5 bytes and 5 bytes are received. the last byte will be saved in FIFO but not trigger EDMA transfer because the water mark is 2. */ if (rxEdmaHandle) { base->WATER &= (~LPUART_WATER_RXWATER_MASK); } #endif /* Configure TX. */ if (txEdmaHandle) { EDMA_SetCallback(handle->txEdmaHandle, LPUART_SendEDMACallback, &s_edmaPrivateHandle[instance]); } /* Configure RX. */ if (rxEdmaHandle) { EDMA_SetCallback(handle->rxEdmaHandle, LPUART_ReceiveEDMACallback, &s_edmaPrivateHandle[instance]); } } status_t LPUART_SendEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle, lpuart_transfer_t *xfer) { assert(handle->txEdmaHandle); edma_transfer_config_t xferConfig; status_t status; /* Return error if xfer invalid. */ if ((0U == xfer->dataSize) || (NULL == xfer->data)) { return kStatus_InvalidArgument; } /* If previous TX not finished. */ if (kLPUART_TxBusy == handle->txState) { status = kStatus_LPUART_TxBusy; } else { handle->txState = kLPUART_TxBusy; handle->txDataSizeAll = xfer->dataSize; /* Prepare transfer. */ EDMA_PrepareTransfer(&xferConfig, xfer->data, sizeof(uint8_t), (void *)LPUART_GetDataRegisterAddress(base), sizeof(uint8_t), sizeof(uint8_t), xfer->dataSize, kEDMA_MemoryToPeripheral); /* Submit transfer. */ EDMA_SubmitTransfer(handle->txEdmaHandle, &xferConfig); EDMA_StartTransfer(handle->txEdmaHandle); /* Enable LPUART TX EDMA. */ LPUART_EnableTxDMA(base, true); status = kStatus_Success; } return status; } status_t LPUART_ReceiveEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle, lpuart_transfer_t *xfer) { assert(handle->rxEdmaHandle); edma_transfer_config_t xferConfig; status_t status; /* Return error if xfer invalid. */ if ((0U == xfer->dataSize) || (NULL == xfer->data)) { return kStatus_InvalidArgument; } /* If previous RX not finished. */ if (kLPUART_RxBusy == handle->rxState) { status = kStatus_LPUART_RxBusy; } else { handle->rxState = kLPUART_RxBusy; handle->rxDataSizeAll = xfer->dataSize; /* Prepare transfer. */ EDMA_PrepareTransfer(&xferConfig, (void *)LPUART_GetDataRegisterAddress(base), sizeof(uint8_t), xfer->data, sizeof(uint8_t), sizeof(uint8_t), xfer->dataSize, kEDMA_PeripheralToMemory); /* Submit transfer. */ EDMA_SubmitTransfer(handle->rxEdmaHandle, &xferConfig); EDMA_StartTransfer(handle->rxEdmaHandle); /* Enable LPUART RX EDMA. */ LPUART_EnableRxDMA(base, true); status = kStatus_Success; } return status; } void LPUART_TransferAbortSendEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle) { assert(handle->txEdmaHandle); /* Disable LPUART TX EDMA. */ LPUART_EnableTxDMA(base, false); /* Stop transfer. */ EDMA_AbortTransfer(handle->txEdmaHandle); handle->txState = kLPUART_TxIdle; } void LPUART_TransferAbortReceiveEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle) { assert(handle->rxEdmaHandle); /* Disable LPUART RX EDMA. */ LPUART_EnableRxDMA(base, false); /* Stop transfer. */ EDMA_AbortTransfer(handle->rxEdmaHandle); handle->rxState = kLPUART_RxIdle; } status_t LPUART_TransferGetReceiveCountEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle, uint32_t *count) { assert(handle->rxEdmaHandle); if (kLPUART_RxIdle == handle->rxState) { return kStatus_NoTransferInProgress; } if (!count) { return kStatus_InvalidArgument; } *count = handle->rxDataSizeAll - EDMA_GetRemainingBytes(handle->rxEdmaHandle->base, handle->rxEdmaHandle->channel); return kStatus_Success; } status_t LPUART_TransferGetSendCountEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle, uint32_t *count) { assert(handle->txEdmaHandle); if (kLPUART_TxIdle == handle->txState) { return kStatus_NoTransferInProgress; } if (!count) { return kStatus_InvalidArgument; } *count = handle->txDataSizeAll - EDMA_GetRemainingBytes(handle->txEdmaHandle->base, handle->txEdmaHandle->channel); return kStatus_Success; } |