drivers/staging/winbond/linux/wb35rx.c

   1 //============================================================================
   2 //  Copyright (c) 1996-2002 Winbond Electronic Corporation
   3 //
   4 //  Module Name:
   5 //    Wb35Rx.c
   6 //
   7 //  Abstract:
   8 //    Processing the Rx message from down layer
   9 //
  10 //============================================================================
  11 #include "sysdef.h"
  12
  13
  14 void Wb35Rx_start(phw_data_t pHwData)
  15 {
  16         PWB35RX pWb35Rx = &pHwData->Wb35Rx;
  17
  18         // Allow only one thread to run into the Wb35Rx() function
  19         if (OS_ATOMIC_INC(pHwData->Adapter, &pWb35Rx->RxFireCounter) == 1) {
  20                 pWb35Rx->EP3vm_state = VM_RUNNING;
  21                 Wb35Rx(pHwData);
  22         } else
  23                 OS_ATOMIC_DEC(pHwData->Adapter, &pWb35Rx->RxFireCounter);
  24 }
  25
  26 // This function cannot reentrain
  27 void Wb35Rx(  phw_data_t pHwData )
  28 {
  29         PWB35RX pWb35Rx = &pHwData->Wb35Rx;
  30         u8 *    pRxBufferAddress;
  31         PURB    pUrb = (PURB)pWb35Rx->RxUrb;
  32         int     retv;
  33         u32     RxBufferId;
  34
  35         //
  36         // Issuing URB
  37         //
  38         if (pHwData->SurpriseRemove || pHwData->HwStop)
  39                 goto error;
  40
  41         if (pWb35Rx->rx_halt)
  42                 goto error;
  43
  44         // Get RxBuffer's ID
  45         RxBufferId = pWb35Rx->RxBufferId;
  46         if (!pWb35Rx->RxOwner[RxBufferId]) {
  47                 // It's impossible to run here.
  48                 #ifdef _PE_RX_DUMP_
  49                 WBDEBUG(("Rx driver fifo unavailable\n"));
  50                 #endif
  51                 goto error;
  52         }
  53
  54         // Update buffer point, then start to bulkin the data from USB
  55         pWb35Rx->RxBufferId++;
  56         pWb35Rx->RxBufferId %= MAX_USB_RX_BUFFER_NUMBER;
  57
  58         pWb35Rx->CurrentRxBufferId = RxBufferId;
  59
  60         if (1 != OS_MEMORY_ALLOC((void* *)&pWb35Rx->pDRx, MAX_USB_RX_BUFFER)) {
  61                 printk("w35und: Rx memory alloc failed\n");
  62                 goto error;
  63         }
  64         pRxBufferAddress = pWb35Rx->pDRx;
  65
  66         usb_fill_bulk_urb(pUrb, pHwData->WbUsb.udev,
  67                           usb_rcvbulkpipe(pHwData->WbUsb.udev, 3),
  68                           pRxBufferAddress, MAX_USB_RX_BUFFER,
  69                           Wb35Rx_Complete, pHwData);
  70
  71         pWb35Rx->EP3vm_state = VM_RUNNING;
  72
  73         retv = wb_usb_submit_urb(pUrb);
  74
  75         if (retv != 0) {
  76                 printk("Rx URB sending error\n");
  77                 goto error;
  78         }
  79         return;
  80
  81 error:
  82         // VM stop
  83         pWb35Rx->EP3vm_state = VM_STOP;
  84         OS_ATOMIC_DEC( pHwData->Adapter, &pWb35Rx->RxFireCounter );
  85 }
  86
  87 void Wb35Rx_Complete(PURB pUrb)
  88 {
  89         phw_data_t      pHwData = pUrb->context;
  90         PWB35RX         pWb35Rx = &pHwData->Wb35Rx;
  91         u8 *            pRxBufferAddress;
  92         u32             SizeCheck;
  93         u16             BulkLength;
  94         u32             RxBufferId;
  95         R00_DESCRIPTOR  R00;
  96
  97         // Variable setting
  98         pWb35Rx->EP3vm_state = VM_COMPLETED;
  99         pWb35Rx->EP3VM_status = pUrb->status;//Store the last result of Irp
 100
 101         RxBufferId = pWb35Rx->CurrentRxBufferId;
 102
 103         pRxBufferAddress = pWb35Rx->pDRx;
 104         BulkLength = (u16)pUrb->actual_length;
 105
 106         // The IRP is completed
 107         pWb35Rx->EP3vm_state = VM_COMPLETED;
 108
 109         if (pHwData->SurpriseRemove || pHwData->HwStop) // Must be here, or RxBufferId is invalid
 110                 goto error;
 111
 112         if (pWb35Rx->rx_halt)
 113                 goto error;
 114
 115         // Start to process the data only in successful condition
 116         pWb35Rx->RxOwner[ RxBufferId ] = 0; // Set the owner to driver
 117         R00.value = le32_to_cpu(*(u32 *)pRxBufferAddress);
 118
 119         // The URB is completed, check the result
 120         if (pWb35Rx->EP3VM_status != 0) {
 121                 #ifdef _PE_USB_STATE_DUMP_
 122                 WBDEBUG(("EP3 IoCompleteRoutine return error\n"));
 123                 DebugUsbdStatusInformation( pWb35Rx->EP3VM_status );
 124                 #endif
 125                 pWb35Rx->EP3vm_state = VM_STOP;
 126                 goto error;
 127         }
 128
 129         // 20060220 For recovering. check if operating in single USB mode
 130         if (!HAL_USB_MODE_BURST(pHwData)) {
 131                 SizeCheck = R00.R00_receive_byte_count;  //20060926 anson's endian
 132                 if ((SizeCheck & 0x03) > 0)
 133                         SizeCheck -= 4;
 134                 SizeCheck = (SizeCheck + 3) & ~0x03;
 135                 SizeCheck += 12; // 8 + 4 badbeef
 136                 if ((BulkLength > 1600) ||
 137                         (SizeCheck > 1600) ||
 138                         (BulkLength != SizeCheck) ||
 139                         (BulkLength == 0)) { // Add for fail Urb
 140                         pWb35Rx->EP3vm_state = VM_STOP;
 141                         pWb35Rx->Ep3ErrorCount2++;
 142                 }
 143         }
 144
 145         // Indicating the receiving data
 146         pWb35Rx->ByteReceived += BulkLength;
 147         pWb35Rx->RxBufferSize[ RxBufferId ] = BulkLength;
 148
 149         if (!pWb35Rx->RxOwner[ RxBufferId ])
 150                 Wb35Rx_indicate(pHwData);
 151
 152         kfree(pWb35Rx->pDRx);
 153         // Do the next receive
 154         Wb35Rx(pHwData);
 155         return;
 156
 157 error:
 158         pWb35Rx->RxOwner[ RxBufferId ] = 1; // Set the owner to hardware
 159         OS_ATOMIC_DEC( pHwData->Adapter, &pWb35Rx->RxFireCounter );
 160         pWb35Rx->EP3vm_state = VM_STOP;
 161 }
 162
 163 //=====================================================================================
 164 unsigned char Wb35Rx_initial(phw_data_t pHwData)
 165 {
 166         PWB35RX pWb35Rx = &pHwData->Wb35Rx;
 167
 168         // Initial the Buffer Queue
 169         Wb35Rx_reset_descriptor( pHwData );
 170
 171         pWb35Rx->RxUrb = wb_usb_alloc_urb(0);
 172         return (!!pWb35Rx->RxUrb);
 173 }
 174
 175 void Wb35Rx_stop(phw_data_t pHwData)
 176 {
 177         PWB35RX pWb35Rx = &pHwData->Wb35Rx;
 178
 179         // Canceling the Irp if already sends it out.
 180         if (pWb35Rx->EP3vm_state == VM_RUNNING) {
 181                 usb_unlink_urb( pWb35Rx->RxUrb ); // Only use unlink, let Wb35Rx_destroy to free them
 182                 #ifdef _PE_RX_DUMP_
 183                 WBDEBUG(("EP3 Rx stop\n"));
 184                 #endif
 185         }
 186 }
 187
 188 // Needs process context
 189 void Wb35Rx_destroy(phw_data_t pHwData)
 190 {
 191         PWB35RX pWb35Rx = &pHwData->Wb35Rx;
 192
 193         do {
 194                 OS_SLEEP(10000); // Delay for waiting function enter 940623.1.a
 195         } while (pWb35Rx->EP3vm_state != VM_STOP);
 196         OS_SLEEP(10000); // Delay for waiting function exit 940623.1.b
 197
 198         if (pWb35Rx->RxUrb)
 199                 usb_free_urb( pWb35Rx->RxUrb );
 200         #ifdef _PE_RX_DUMP_
 201         WBDEBUG(("Wb35Rx_destroy OK\n"));
 202         #endif
 203 }
 204
 205 void Wb35Rx_reset_descriptor(  phw_data_t pHwData )
 206 {
 207         PWB35RX pWb35Rx = &pHwData->Wb35Rx;
 208         u32     i;
 209
 210         pWb35Rx->ByteReceived = 0;
 211         pWb35Rx->RxProcessIndex = 0;
 212         pWb35Rx->RxBufferId = 0;
 213         pWb35Rx->EP3vm_state = VM_STOP;
 214         pWb35Rx->rx_halt = 0;
 215
 216         // Initial the Queue. The last buffer is reserved for used if the Rx resource is unavailable.
 217         for( i=0; i<MAX_USB_RX_BUFFER_NUMBER; i++ )
 218                 pWb35Rx->RxOwner[i] = 1;
 219 }
 220
 221 void Wb35Rx_adjust(PDESCRIPTOR pRxDes)
 222 {
 223         u32 *   pRxBufferAddress;
 224         u32     DecryptionMethod;
 225         u32     i;
 226         u16     BufferSize;
 227
 228         DecryptionMethod = pRxDes->R01.R01_decryption_method;
 229         pRxBufferAddress = pRxDes->buffer_address[0];
 230         BufferSize = pRxDes->buffer_size[0];
 231
 232         // Adjust the last part of data. Only data left
 233         BufferSize -= 4; // For CRC-32
 234         if (DecryptionMethod)
 235                 BufferSize -= 4;
 236         if (DecryptionMethod == 3) // For CCMP
 237                 BufferSize -= 4;
 238
 239         // Adjust the IV field which after 802.11 header and ICV field.
 240         if (DecryptionMethod == 1) // For WEP
 241         {
 242                 for( i=6; i>0; i-- )
 243                         pRxBufferAddress[i] = pRxBufferAddress[i-1];
 244                 pRxDes->buffer_address[0] = pRxBufferAddress + 1;
 245                 BufferSize -= 4; // 4 byte for IV
 246         }
 247         else if( DecryptionMethod ) // For TKIP and CCMP
 248         {
 249                 for (i=7; i>1; i--)
 250                         pRxBufferAddress[i] = pRxBufferAddress[i-2];
 251                 pRxDes->buffer_address[0] = pRxBufferAddress + 2;//Update the descriptor, shift 8 byte
 252                 BufferSize -= 8; // 8 byte for IV + ICV
 253         }
 254         pRxDes->buffer_size[0] = BufferSize;
 255 }
 256
 257 extern void packet_came(char *pRxBufferAddress, int PacketSize);
 258
 259
 260 u16 Wb35Rx_indicate(phw_data_t pHwData)
 261 {
 262         DESCRIPTOR      RxDes;
 263         PWB35RX pWb35Rx = &pHwData->Wb35Rx;
 264         u8 *            pRxBufferAddress;
 265         u16             PacketSize;
 266         u16             stmp, BufferSize, stmp2 = 0;
 267         u32             RxBufferId;
 268
 269         // Only one thread be allowed to run into the following
 270         do {
 271                 RxBufferId = pWb35Rx->RxProcessIndex;
 272                 if (pWb35Rx->RxOwner[ RxBufferId ]) //Owner by VM
 273                         break;
 274
 275                 pWb35Rx->RxProcessIndex++;
 276                 pWb35Rx->RxProcessIndex %= MAX_USB_RX_BUFFER_NUMBER;
 277
 278                 pRxBufferAddress = pWb35Rx->pDRx;
 279                 BufferSize = pWb35Rx->RxBufferSize[ RxBufferId ];
 280
 281                 // Parse the bulkin buffer
 282                 while (BufferSize >= 4) {
 283                         if ((cpu_to_le32(*(u32 *)pRxBufferAddress) & 0x0fffffff) == RX_END_TAG) //Is ending? 921002.9.a
 284                                 break;
 285
 286                         // Get the R00 R01 first
 287                         RxDes.R00.value = le32_to_cpu(*(u32 *)pRxBufferAddress);
 288                         PacketSize = (u16)RxDes.R00.R00_receive_byte_count;
 289                         RxDes.R01.value = le32_to_cpu(*((u32 *)(pRxBufferAddress+4)));
 290                         // For new DMA 4k
 291                         if ((PacketSize & 0x03) > 0)
 292                                 PacketSize -= 4;
 293
 294                         // Basic check for Rx length. Is length valid?
 295                         if (PacketSize > MAX_PACKET_SIZE) {
 296                                 #ifdef _PE_RX_DUMP_
 297                                 WBDEBUG(("Serious ERROR : Rx data size too long, size =%d\n", PacketSize));
 298                                 #endif
 299
 300                                 pWb35Rx->EP3vm_state = VM_STOP;
 301                                 pWb35Rx->Ep3ErrorCount2++;
 302                                 break;
 303                         }
 304
 305                         // Start to process Rx buffer
 306 //                      RxDes.Descriptor_ID = RxBufferId; // Due to synchronous indicate, the field doesn't necessary to use.
 307                         BufferSize -= 8; //subtract 8 byte for 35's USB header length
 308                         pRxBufferAddress += 8;
 309
 310                         RxDes.buffer_address[0] = pRxBufferAddress;
 311                         RxDes.buffer_size[0] = PacketSize;
 312                         RxDes.buffer_number = 1;
 313                         RxDes.buffer_start_index = 0;
 314                         RxDes.buffer_total_size = RxDes.buffer_size[0];
 315                         Wb35Rx_adjust(&RxDes);
 316
 317                         packet_came(pRxBufferAddress, PacketSize);
 318
 319                         // Move RxBuffer point to the next
 320                         stmp = PacketSize + 3;
 321                         stmp &= ~0x03; // 4n alignment
 322                         pRxBufferAddress += stmp;
 323                         BufferSize -= stmp;
 324                         stmp2 += stmp;
 325                 }
 326
 327                 // Reclaim resource
 328                 pWb35Rx->RxOwner[ RxBufferId ] = 1;
 329         } while(TRUE);
 330
 331         return stmp2;
 332 }
 333
 334