| 1 | /* |
| 2 | * |
| 3 | * Copyright (c) 2004-2007 Atheros Communications Inc. |
| 4 | * All rights reserved. |
| 5 | * |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation; |
| 10 | * |
| 11 | * Software distributed under the License is distributed on an "AS |
| 12 | * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or |
| 13 | * implied. See the License for the specific language governing |
| 14 | * rights and limitations under the License. |
| 15 | * |
| 16 | * |
| 17 | * |
| 18 | */ |
| 19 | |
| 20 | #include "ar6000_drv.h" |
| 21 | |
| 22 | #ifdef HTC_RAW_INTERFACE |
| 23 | |
| 24 | static void |
| 25 | ar6000_htc_raw_read_cb(void *Context, HTC_PACKET *pPacket) |
| 26 | { |
| 27 | AR_SOFTC_T *ar = (AR_SOFTC_T *)Context; |
| 28 | raw_htc_buffer *busy; |
| 29 | HTC_RAW_STREAM_ID streamID; |
| 30 | |
| 31 | busy = (raw_htc_buffer *)pPacket->pPktContext; |
| 32 | A_ASSERT(busy != NULL); |
| 33 | |
| 34 | if (pPacket->Status == A_ECANCELED) { |
| 35 | /* |
| 36 | * HTC provides A_ECANCELED status when it doesn't want to be refilled |
| 37 | * (probably due to a shutdown) |
| 38 | */ |
| 39 | return; |
| 40 | } |
| 41 | |
| 42 | streamID = arEndpoint2RawStreamID(ar,pPacket->Endpoint); |
| 43 | A_ASSERT(streamID != HTC_RAW_STREAM_NOT_MAPPED); |
| 44 | |
| 45 | #ifdef CF |
| 46 | if (down_trylock(&ar->raw_htc_read_sem[streamID])) { |
| 47 | #else |
| 48 | if (down_interruptible(&ar->raw_htc_read_sem[streamID])) { |
| 49 | #endif /* CF */ |
| 50 | AR_DEBUG2_PRINTF("Unable to down the semaphore\n"); |
| 51 | } |
| 52 | |
| 53 | A_ASSERT((pPacket->Status != A_OK) || |
| 54 | (pPacket->pBuffer == (busy->data + HTC_HEADER_LEN))); |
| 55 | |
| 56 | busy->length = pPacket->ActualLength + HTC_HEADER_LEN; |
| 57 | busy->currPtr = HTC_HEADER_LEN; |
| 58 | ar->read_buffer_available[streamID] = TRUE; |
| 59 | //AR_DEBUG_PRINTF("raw read cb: 0x%X 0x%X \n", busy->currPtr,busy->length); |
| 60 | up(&ar->raw_htc_read_sem[streamID]); |
| 61 | |
| 62 | /* Signal the waiting process */ |
| 63 | AR_DEBUG2_PRINTF("Waking up the StreamID(%d) read process\n", streamID); |
| 64 | wake_up_interruptible(&ar->raw_htc_read_queue[streamID]); |
| 65 | } |
| 66 | |
| 67 | static void |
| 68 | ar6000_htc_raw_write_cb(void *Context, HTC_PACKET *pPacket) |
| 69 | { |
| 70 | AR_SOFTC_T *ar = (AR_SOFTC_T *)Context; |
| 71 | raw_htc_buffer *free; |
| 72 | HTC_RAW_STREAM_ID streamID; |
| 73 | |
| 74 | free = (raw_htc_buffer *)pPacket->pPktContext; |
| 75 | A_ASSERT(free != NULL); |
| 76 | |
| 77 | if (pPacket->Status == A_ECANCELED) { |
| 78 | /* |
| 79 | * HTC provides A_ECANCELED status when it doesn't want to be refilled |
| 80 | * (probably due to a shutdown) |
| 81 | */ |
| 82 | return; |
| 83 | } |
| 84 | |
| 85 | streamID = arEndpoint2RawStreamID(ar,pPacket->Endpoint); |
| 86 | A_ASSERT(streamID != HTC_RAW_STREAM_NOT_MAPPED); |
| 87 | |
| 88 | #ifdef CF |
| 89 | if (down_trylock(&ar->raw_htc_write_sem[streamID])) { |
| 90 | #else |
| 91 | if (down_interruptible(&ar->raw_htc_write_sem[streamID])) { |
| 92 | #endif |
| 93 | AR_DEBUG2_PRINTF("Unable to down the semaphore\n"); |
| 94 | } |
| 95 | |
| 96 | A_ASSERT(pPacket->pBuffer == (free->data + HTC_HEADER_LEN)); |
| 97 | |
| 98 | free->length = 0; |
| 99 | ar->write_buffer_available[streamID] = TRUE; |
| 100 | up(&ar->raw_htc_write_sem[streamID]); |
| 101 | |
| 102 | /* Signal the waiting process */ |
| 103 | AR_DEBUG2_PRINTF("Waking up the StreamID(%d) write process\n", streamID); |
| 104 | wake_up_interruptible(&ar->raw_htc_write_queue[streamID]); |
| 105 | } |
| 106 | |
| 107 | /* connect to a service */ |
| 108 | static A_STATUS ar6000_connect_raw_service(AR_SOFTC_T *ar, |
| 109 | HTC_RAW_STREAM_ID StreamID) |
| 110 | { |
| 111 | A_STATUS status; |
| 112 | HTC_SERVICE_CONNECT_RESP response; |
| 113 | A_UINT8 streamNo; |
| 114 | HTC_SERVICE_CONNECT_REQ connect; |
| 115 | |
| 116 | do { |
| 117 | |
| 118 | A_MEMZERO(&connect,sizeof(connect)); |
| 119 | /* pass the stream ID as meta data to the RAW streams service */ |
| 120 | streamNo = (A_UINT8)StreamID; |
| 121 | connect.pMetaData = &streamNo; |
| 122 | connect.MetaDataLength = sizeof(A_UINT8); |
| 123 | /* these fields are the same for all endpoints */ |
| 124 | connect.EpCallbacks.pContext = ar; |
| 125 | connect.EpCallbacks.EpTxComplete = ar6000_htc_raw_write_cb; |
| 126 | connect.EpCallbacks.EpRecv = ar6000_htc_raw_read_cb; |
| 127 | /* simple interface, we don't need these optional callbacks */ |
| 128 | connect.EpCallbacks.EpRecvRefill = NULL; |
| 129 | connect.EpCallbacks.EpSendFull = NULL; |
| 130 | connect.EpCallbacks.EpSendAvail = NULL; |
| 131 | connect.MaxSendQueueDepth = RAW_HTC_WRITE_BUFFERS_NUM; |
| 132 | |
| 133 | /* connect to the raw streams service, we may be able to get 1 or more |
| 134 | * connections, depending on WHAT is running on the target */ |
| 135 | connect.ServiceID = HTC_RAW_STREAMS_SVC; |
| 136 | |
| 137 | A_MEMZERO(&response,sizeof(response)); |
| 138 | |
| 139 | /* try to connect to the raw stream, it is okay if this fails with |
| 140 | * status HTC_SERVICE_NO_MORE_EP */ |
| 141 | status = HTCConnectService(ar->arHtcTarget, |
| 142 | &connect, |
| 143 | &response); |
| 144 | |
| 145 | if (A_FAILED(status)) { |
| 146 | if (response.ConnectRespCode == HTC_SERVICE_NO_MORE_EP) { |
| 147 | AR_DEBUG_PRINTF("HTC RAW , No more streams allowed \n"); |
| 148 | status = A_OK; |
| 149 | } |
| 150 | break; |
| 151 | } |
| 152 | |
| 153 | /* set endpoint mapping for the RAW HTC streams */ |
| 154 | arSetRawStream2EndpointIDMap(ar,StreamID,response.Endpoint); |
| 155 | |
| 156 | AR_DEBUG_PRINTF("HTC RAW : stream ID: %d, endpoint: %d\n", |
| 157 | StreamID, arRawStream2EndpointID(ar,StreamID)); |
| 158 | |
| 159 | } while (FALSE); |
| 160 | |
| 161 | return status; |
| 162 | } |
| 163 | |
| 164 | int ar6000_htc_raw_open(AR_SOFTC_T *ar) |
| 165 | { |
| 166 | A_STATUS status; |
| 167 | int streamID, endPt, count2; |
| 168 | raw_htc_buffer *buffer; |
| 169 | HTC_SERVICE_ID servicepriority; |
| 170 | |
| 171 | A_ASSERT(ar->arHtcTarget != NULL); |
| 172 | |
| 173 | /* wait for target */ |
| 174 | status = HTCWaitTarget(ar->arHtcTarget); |
| 175 | |
| 176 | if (A_FAILED(status)) { |
| 177 | AR_DEBUG_PRINTF("HTCWaitTarget failed (%d)\n", status); |
| 178 | return -ENODEV; |
| 179 | } |
| 180 | |
| 181 | for (endPt = 0; endPt < ENDPOINT_MAX; endPt++) { |
| 182 | ar->arEp2RawMapping[endPt] = HTC_RAW_STREAM_NOT_MAPPED; |
| 183 | } |
| 184 | |
| 185 | for (streamID = HTC_RAW_STREAM_0; streamID < HTC_RAW_STREAM_NUM_MAX; streamID++) { |
| 186 | /* Initialize the data structures */ |
| 187 | init_MUTEX(&ar->raw_htc_read_sem[streamID]); |
| 188 | init_MUTEX(&ar->raw_htc_write_sem[streamID]); |
| 189 | init_waitqueue_head(&ar->raw_htc_read_queue[streamID]); |
| 190 | init_waitqueue_head(&ar->raw_htc_write_queue[streamID]); |
| 191 | |
| 192 | /* try to connect to the raw service */ |
| 193 | status = ar6000_connect_raw_service(ar,streamID); |
| 194 | |
| 195 | if (A_FAILED(status)) { |
| 196 | break; |
| 197 | } |
| 198 | |
| 199 | if (arRawStream2EndpointID(ar,streamID) == 0) { |
| 200 | break; |
| 201 | } |
| 202 | |
| 203 | for (count2 = 0; count2 < RAW_HTC_READ_BUFFERS_NUM; count2 ++) { |
| 204 | /* Initialize the receive buffers */ |
| 205 | buffer = ar->raw_htc_write_buffer[streamID][count2]; |
| 206 | memset(buffer, 0, sizeof(raw_htc_buffer)); |
| 207 | buffer = ar->raw_htc_read_buffer[streamID][count2]; |
| 208 | memset(buffer, 0, sizeof(raw_htc_buffer)); |
| 209 | |
| 210 | SET_HTC_PACKET_INFO_RX_REFILL(&buffer->HTCPacket, |
| 211 | buffer, |
| 212 | buffer->data, |
| 213 | AR6000_BUFFER_SIZE, |
| 214 | arRawStream2EndpointID(ar,streamID)); |
| 215 | |
| 216 | /* Queue buffers to HTC for receive */ |
| 217 | if ((status = HTCAddReceivePkt(ar->arHtcTarget, &buffer->HTCPacket)) != A_OK) |
| 218 | { |
| 219 | BMIInit(); |
| 220 | return -EIO; |
| 221 | } |
| 222 | } |
| 223 | |
| 224 | for (count2 = 0; count2 < RAW_HTC_WRITE_BUFFERS_NUM; count2 ++) { |
| 225 | /* Initialize the receive buffers */ |
| 226 | buffer = ar->raw_htc_write_buffer[streamID][count2]; |
| 227 | memset(buffer, 0, sizeof(raw_htc_buffer)); |
| 228 | } |
| 229 | |
| 230 | ar->read_buffer_available[streamID] = FALSE; |
| 231 | ar->write_buffer_available[streamID] = TRUE; |
| 232 | } |
| 233 | |
| 234 | if (A_FAILED(status)) { |
| 235 | return -EIO; |
| 236 | } |
| 237 | |
| 238 | AR_DEBUG_PRINTF("HTC RAW, number of streams the target supports: %d \n", streamID); |
| 239 | |
| 240 | servicepriority = HTC_RAW_STREAMS_SVC; /* only 1 */ |
| 241 | |
| 242 | /* set callbacks and priority list */ |
| 243 | HTCSetCreditDistribution(ar->arHtcTarget, |
| 244 | ar, |
| 245 | NULL, /* use default */ |
| 246 | NULL, /* use default */ |
| 247 | &servicepriority, |
| 248 | 1); |
| 249 | |
| 250 | /* Start the HTC component */ |
| 251 | if ((status = HTCStart(ar->arHtcTarget)) != A_OK) { |
| 252 | BMIInit(); |
| 253 | return -EIO; |
| 254 | } |
| 255 | |
| 256 | (ar)->arRawIfInit = TRUE; |
| 257 | |
| 258 | return 0; |
| 259 | } |
| 260 | |
| 261 | int ar6000_htc_raw_close(AR_SOFTC_T *ar) |
| 262 | { |
| 263 | A_PRINTF("ar6000_htc_raw_close called \n"); |
| 264 | HTCStop(ar->arHtcTarget); |
| 265 | |
| 266 | /* reset the device */ |
| 267 | ar6000_reset_device(ar->arHifDevice, ar->arTargetType); |
| 268 | /* Initialize the BMI component */ |
| 269 | BMIInit(); |
| 270 | |
| 271 | return 0; |
| 272 | } |
| 273 | |
| 274 | raw_htc_buffer * |
| 275 | get_filled_buffer(AR_SOFTC_T *ar, HTC_RAW_STREAM_ID StreamID) |
| 276 | { |
| 277 | int count; |
| 278 | raw_htc_buffer *busy; |
| 279 | |
| 280 | /* Check for data */ |
| 281 | for (count = 0; count < RAW_HTC_READ_BUFFERS_NUM; count ++) { |
| 282 | busy = ar->raw_htc_read_buffer[StreamID][count]; |
| 283 | if (busy->length) { |
| 284 | break; |
| 285 | } |
| 286 | } |
| 287 | if (busy->length) { |
| 288 | ar->read_buffer_available[StreamID] = TRUE; |
| 289 | } else { |
| 290 | ar->read_buffer_available[StreamID] = FALSE; |
| 291 | } |
| 292 | |
| 293 | return busy; |
| 294 | } |
| 295 | |
| 296 | ssize_t ar6000_htc_raw_read(AR_SOFTC_T *ar, HTC_RAW_STREAM_ID StreamID, |
| 297 | char __user *buffer, size_t length) |
| 298 | { |
| 299 | int readPtr; |
| 300 | raw_htc_buffer *busy; |
| 301 | |
| 302 | if (arRawStream2EndpointID(ar,StreamID) == 0) { |
| 303 | AR_DEBUG_PRINTF("StreamID(%d) not connected! \n", StreamID); |
| 304 | return -EFAULT; |
| 305 | } |
| 306 | |
| 307 | if (down_interruptible(&ar->raw_htc_read_sem[StreamID])) { |
| 308 | return -ERESTARTSYS; |
| 309 | } |
| 310 | |
| 311 | busy = get_filled_buffer(ar,StreamID); |
| 312 | while (!ar->read_buffer_available[StreamID]) { |
| 313 | up(&ar->raw_htc_read_sem[StreamID]); |
| 314 | |
| 315 | /* Wait for the data */ |
| 316 | AR_DEBUG2_PRINTF("Sleeping StreamID(%d) read process\n", StreamID); |
| 317 | if (wait_event_interruptible(ar->raw_htc_read_queue[StreamID], |
| 318 | ar->read_buffer_available[StreamID])) |
| 319 | { |
| 320 | return -EINTR; |
| 321 | } |
| 322 | if (down_interruptible(&ar->raw_htc_read_sem[StreamID])) { |
| 323 | return -ERESTARTSYS; |
| 324 | } |
| 325 | busy = get_filled_buffer(ar,StreamID); |
| 326 | } |
| 327 | |
| 328 | /* Read the data */ |
| 329 | readPtr = busy->currPtr; |
| 330 | if (length > busy->length - HTC_HEADER_LEN) { |
| 331 | length = busy->length - HTC_HEADER_LEN; |
| 332 | } |
| 333 | if (copy_to_user(buffer, &busy->data[readPtr], length)) { |
| 334 | up(&ar->raw_htc_read_sem[StreamID]); |
| 335 | return -EFAULT; |
| 336 | } |
| 337 | |
| 338 | busy->currPtr += length; |
| 339 | |
| 340 | //AR_DEBUG_PRINTF("raw read ioctl: currPTR : 0x%X 0x%X \n", busy->currPtr,busy->length); |
| 341 | |
| 342 | if (busy->currPtr == busy->length) |
| 343 | { |
| 344 | busy->currPtr = 0; |
| 345 | busy->length = 0; |
| 346 | HTC_PACKET_RESET_RX(&busy->HTCPacket); |
| 347 | //AR_DEBUG_PRINTF("raw read ioctl: ep for packet:%d \n", busy->HTCPacket.Endpoint); |
| 348 | HTCAddReceivePkt(ar->arHtcTarget, &busy->HTCPacket); |
| 349 | } |
| 350 | ar->read_buffer_available[StreamID] = FALSE; |
| 351 | up(&ar->raw_htc_read_sem[StreamID]); |
| 352 | |
| 353 | return length; |
| 354 | } |
| 355 | |
| 356 | static raw_htc_buffer * |
| 357 | get_free_buffer(AR_SOFTC_T *ar, HTC_ENDPOINT_ID StreamID) |
| 358 | { |
| 359 | int count; |
| 360 | raw_htc_buffer *free; |
| 361 | |
| 362 | free = NULL; |
| 363 | for (count = 0; count < RAW_HTC_WRITE_BUFFERS_NUM; count ++) { |
| 364 | free = ar->raw_htc_write_buffer[StreamID][count]; |
| 365 | if (free->length == 0) { |
| 366 | break; |
| 367 | } |
| 368 | } |
| 369 | if (!free->length) { |
| 370 | ar->write_buffer_available[StreamID] = TRUE; |
| 371 | } else { |
| 372 | ar->write_buffer_available[StreamID] = FALSE; |
| 373 | } |
| 374 | |
| 375 | return free; |
| 376 | } |
| 377 | |
| 378 | ssize_t ar6000_htc_raw_write(AR_SOFTC_T *ar, HTC_RAW_STREAM_ID StreamID, |
| 379 | char __user *buffer, size_t length) |
| 380 | { |
| 381 | int writePtr; |
| 382 | raw_htc_buffer *free; |
| 383 | |
| 384 | if (arRawStream2EndpointID(ar,StreamID) == 0) { |
| 385 | AR_DEBUG_PRINTF("StreamID(%d) not connected! \n", StreamID); |
| 386 | return -EFAULT; |
| 387 | } |
| 388 | |
| 389 | if (down_interruptible(&ar->raw_htc_write_sem[StreamID])) { |
| 390 | return -ERESTARTSYS; |
| 391 | } |
| 392 | |
| 393 | /* Search for a free buffer */ |
| 394 | free = get_free_buffer(ar,StreamID); |
| 395 | |
| 396 | /* Check if there is space to write else wait */ |
| 397 | while (!ar->write_buffer_available[StreamID]) { |
| 398 | up(&ar->raw_htc_write_sem[StreamID]); |
| 399 | |
| 400 | /* Wait for buffer to become free */ |
| 401 | AR_DEBUG2_PRINTF("Sleeping StreamID(%d) write process\n", StreamID); |
| 402 | if (wait_event_interruptible(ar->raw_htc_write_queue[StreamID], |
| 403 | ar->write_buffer_available[StreamID])) |
| 404 | { |
| 405 | return -EINTR; |
| 406 | } |
| 407 | if (down_interruptible(&ar->raw_htc_write_sem[StreamID])) { |
| 408 | return -ERESTARTSYS; |
| 409 | } |
| 410 | free = get_free_buffer(ar,StreamID); |
| 411 | } |
| 412 | |
| 413 | /* Send the data */ |
| 414 | writePtr = HTC_HEADER_LEN; |
| 415 | if (length > (AR6000_BUFFER_SIZE - HTC_HEADER_LEN)) { |
| 416 | length = AR6000_BUFFER_SIZE - HTC_HEADER_LEN; |
| 417 | } |
| 418 | |
| 419 | if (copy_from_user(&free->data[writePtr], buffer, length)) { |
| 420 | up(&ar->raw_htc_read_sem[StreamID]); |
| 421 | return -EFAULT; |
| 422 | } |
| 423 | |
| 424 | free->length = length; |
| 425 | |
| 426 | SET_HTC_PACKET_INFO_TX(&free->HTCPacket, |
| 427 | free, |
| 428 | &free->data[writePtr], |
| 429 | length, |
| 430 | arRawStream2EndpointID(ar,StreamID), |
| 431 | AR6K_DATA_PKT_TAG); |
| 432 | |
| 433 | HTCSendPkt(ar->arHtcTarget,&free->HTCPacket); |
| 434 | |
| 435 | ar->write_buffer_available[StreamID] = FALSE; |
| 436 | up(&ar->raw_htc_write_sem[StreamID]); |
| 437 | |
| 438 | return length; |
| 439 | } |
| 440 | #endif /* HTC_RAW_INTERFACE */ |
| 441 | |
