git.oblomov.eu Git - linux-2.6/blob - 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         struct urb *urb = 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         pWb35Rx->pDRx = kzalloc(MAX_USB_RX_BUFFER, GFP_ATOMIC);
  61         if (!pWb35Rx->pDRx) {
  62                 printk("w35und: Rx memory alloc failed\n");
  63                 goto error;
  64         }
  65         pRxBufferAddress = pWb35Rx->pDRx;
  66
  67         usb_fill_bulk_urb(urb, pHwData->WbUsb.udev,
  68                           usb_rcvbulkpipe(pHwData->WbUsb.udev, 3),
  69                           pRxBufferAddress, MAX_USB_RX_BUFFER,
  70                           Wb35Rx_Complete, pHwData);
  71
  72         pWb35Rx->EP3vm_state = VM_RUNNING;
  73
  74         retv = usb_submit_urb(urb, GFP_ATOMIC);
  75
  76         if (retv != 0) {
  77                 printk("Rx URB sending error\n");
  78                 goto error;
  79         }
  80         return;
  81
  82 error:
  83         // VM stop
  84         pWb35Rx->EP3vm_state = VM_STOP;
  85         OS_ATOMIC_DEC( pHwData->adapter, &pWb35Rx->RxFireCounter );
  86 }
  87
  88 void Wb35Rx_Complete(struct urb *urb)
  89 {
  90         phw_data_t      pHwData = urb->context;
  91         PWB35RX         pWb35Rx = &pHwData->Wb35Rx;
  92         u8 *            pRxBufferAddress;
  93         u32             SizeCheck;
  94         u16             BulkLength;
  95         u32             RxBufferId;
  96         R00_DESCRIPTOR  R00;
  97
  98         // Variable setting
  99         pWb35Rx->EP3vm_state = VM_COMPLETED;
 100         pWb35Rx->EP3VM_status = urb->status;//Store the last result of Irp
 101
 102         RxBufferId = pWb35Rx->CurrentRxBufferId;
 103
 104         pRxBufferAddress = pWb35Rx->pDRx;
 105         BulkLength = (u16)urb->actual_length;
 106
 107         // The IRP is completed
 108         pWb35Rx->EP3vm_state = VM_COMPLETED;
 109
 110         if (pHwData->SurpriseRemove || pHwData->HwStop) // Must be here, or RxBufferId is invalid
 111                 goto error;
 112
 113         if (pWb35Rx->rx_halt)
 114                 goto error;
 115
 116         // Start to process the data only in successful condition
 117         pWb35Rx->RxOwner[ RxBufferId ] = 0; // Set the owner to driver
 118         R00.value = le32_to_cpu(*(u32 *)pRxBufferAddress);
 119
 120         // The URB is completed, check the result
 121         if (pWb35Rx->EP3VM_status != 0) {
 122                 #ifdef _PE_USB_STATE_DUMP_
 123                 WBDEBUG(("EP3 IoCompleteRoutine return error\n"));
 124                 DebugUsbdStatusInformation( pWb35Rx->EP3VM_status );
 125                 #endif
 126                 pWb35Rx->EP3vm_state = VM_STOP;
 127                 goto error;
 128         }
 129
 130         // 20060220 For recovering. check if operating in single USB mode
 131         if (!HAL_USB_MODE_BURST(pHwData)) {
 132                 SizeCheck = R00.R00_receive_byte_count;  //20060926 anson's endian
 133                 if ((SizeCheck & 0x03) > 0)
 134                         SizeCheck -= 4;
 135                 SizeCheck = (SizeCheck + 3) & ~0x03;
 136                 SizeCheck += 12; // 8 + 4 badbeef
 137                 if ((BulkLength > 1600) ||
 138                         (SizeCheck > 1600) ||
 139                         (BulkLength != SizeCheck) ||
 140                         (BulkLength == 0)) { // Add for fail Urb
 141                         pWb35Rx->EP3vm_state = VM_STOP;
 142                         pWb35Rx->Ep3ErrorCount2++;
 143                 }
 144         }
 145
 146         // Indicating the receiving data
 147         pWb35Rx->ByteReceived += BulkLength;
 148         pWb35Rx->RxBufferSize[ RxBufferId ] = BulkLength;
 149
 150         if (!pWb35Rx->RxOwner[ RxBufferId ])
 151                 Wb35Rx_indicate(pHwData);
 152
 153         kfree(pWb35Rx->pDRx);
 154         // Do the next receive
 155         Wb35Rx(pHwData);
 156         return;
 157
 158 error:
 159         pWb35Rx->RxOwner[ RxBufferId ] = 1; // Set the owner to hardware
 160         OS_ATOMIC_DEC( pHwData->adapter, &pWb35Rx->RxFireCounter );
 161         pWb35Rx->EP3vm_state = VM_STOP;
 162 }
 163
 164 //=====================================================================================
 165 unsigned char Wb35Rx_initial(phw_data_t pHwData)
 166 {
 167         PWB35RX pWb35Rx = &pHwData->Wb35Rx;
 168
 169         // Initial the Buffer Queue
 170         Wb35Rx_reset_descriptor( pHwData );
 171
 172         pWb35Rx->RxUrb = usb_alloc_urb(0, GFP_ATOMIC);
 173         return (!!pWb35Rx->RxUrb);
 174 }
 175
 176 void Wb35Rx_stop(phw_data_t pHwData)
 177 {
 178         PWB35RX pWb35Rx = &pHwData->Wb35Rx;
 179
 180         // Canceling the Irp if already sends it out.
 181         if (pWb35Rx->EP3vm_state == VM_RUNNING) {
 182                 usb_unlink_urb( pWb35Rx->RxUrb ); // Only use unlink, let Wb35Rx_destroy to free them
 183                 #ifdef _PE_RX_DUMP_
 184                 WBDEBUG(("EP3 Rx stop\n"));
 185                 #endif
 186         }
 187 }
 188
 189 // Needs process context
 190 void Wb35Rx_destroy(phw_data_t pHwData)
 191 {
 192         PWB35RX pWb35Rx = &pHwData->Wb35Rx;
 193
 194         do {
 195                 msleep(10); // Delay for waiting function enter 940623.1.a
 196         } while (pWb35Rx->EP3vm_state != VM_STOP);
 197         msleep(10); // Delay for waiting function exit 940623.1.b
 198
 199         if (pWb35Rx->RxUrb)
 200                 usb_free_urb( pWb35Rx->RxUrb );
 201         #ifdef _PE_RX_DUMP_
 202         WBDEBUG(("Wb35Rx_destroy OK\n"));
 203         #endif
 204 }
 205
 206 void Wb35Rx_reset_descriptor(  phw_data_t pHwData )
 207 {
 208         PWB35RX pWb35Rx = &pHwData->Wb35Rx;
 209         u32     i;
 210
 211         pWb35Rx->ByteReceived = 0;
 212         pWb35Rx->RxProcessIndex = 0;
 213         pWb35Rx->RxBufferId = 0;
 214         pWb35Rx->EP3vm_state = VM_STOP;
 215         pWb35Rx->rx_halt = 0;
 216
 217         // Initial the Queue. The last buffer is reserved for used if the Rx resource is unavailable.
 218         for( i=0; i<MAX_USB_RX_BUFFER_NUMBER; i++ )
 219                 pWb35Rx->RxOwner[i] = 1;
 220 }
 221
 222 void Wb35Rx_adjust(PDESCRIPTOR pRxDes)
 223 {
 224         u32 *   pRxBufferAddress;
 225         u32     DecryptionMethod;
 226         u32     i;
 227         u16     BufferSize;
 228
 229         DecryptionMethod = pRxDes->R01.R01_decryption_method;
 230         pRxBufferAddress = pRxDes->buffer_address[0];
 231         BufferSize = pRxDes->buffer_size[0];
 232
 233         // Adjust the last part of data. Only data left
 234         BufferSize -= 4; // For CRC-32
 235         if (DecryptionMethod)
 236                 BufferSize -= 4;
 237         if (DecryptionMethod == 3) // For CCMP
 238                 BufferSize -= 4;
 239
 240         // Adjust the IV field which after 802.11 header and ICV field.
 241         if (DecryptionMethod == 1) // For WEP
 242         {
 243                 for( i=6; i>0; i-- )
 244                         pRxBufferAddress[i] = pRxBufferAddress[i-1];
 245                 pRxDes->buffer_address[0] = pRxBufferAddress + 1;
 246                 BufferSize -= 4; // 4 byte for IV
 247         }
 248         else if( DecryptionMethod ) // For TKIP and CCMP
 249         {
 250                 for (i=7; i>1; i--)
 251                         pRxBufferAddress[i] = pRxBufferAddress[i-2];
 252                 pRxDes->buffer_address[0] = pRxBufferAddress + 2;//Update the descriptor, shift 8 byte
 253                 BufferSize -= 8; // 8 byte for IV + ICV
 254         }
 255         pRxDes->buffer_size[0] = BufferSize;
 256 }
 257
 258 extern void packet_came(char *pRxBufferAddress, int PacketSize);
 259
 260
 261 u16 Wb35Rx_indicate(phw_data_t pHwData)
 262 {
 263         DESCRIPTOR      RxDes;
 264         PWB35RX pWb35Rx = &pHwData->Wb35Rx;
 265         u8 *            pRxBufferAddress;
 266         u16             PacketSize;
 267         u16             stmp, BufferSize, stmp2 = 0;
 268         u32             RxBufferId;
 269
 270         // Only one thread be allowed to run into the following
 271         do {
 272                 RxBufferId = pWb35Rx->RxProcessIndex;
 273                 if (pWb35Rx->RxOwner[ RxBufferId ]) //Owner by VM
 274                         break;
 275
 276                 pWb35Rx->RxProcessIndex++;
 277                 pWb35Rx->RxProcessIndex %= MAX_USB_RX_BUFFER_NUMBER;
 278
 279                 pRxBufferAddress = pWb35Rx->pDRx;
 280                 BufferSize = pWb35Rx->RxBufferSize[ RxBufferId ];
 281
 282                 // Parse the bulkin buffer
 283                 while (BufferSize >= 4) {
 284                         if ((cpu_to_le32(*(u32 *)pRxBufferAddress) & 0x0fffffff) == RX_END_TAG) //Is ending? 921002.9.a
 285                                 break;
 286
 287                         // Get the R00 R01 first
 288                         RxDes.R00.value = le32_to_cpu(*(u32 *)pRxBufferAddress);
 289                         PacketSize = (u16)RxDes.R00.R00_receive_byte_count;
 290                         RxDes.R01.value = le32_to_cpu(*((u32 *)(pRxBufferAddress+4)));
 291                         // For new DMA 4k
 292                         if ((PacketSize & 0x03) > 0)
 293                                 PacketSize -= 4;
 294
 295                         // Basic check for Rx length. Is length valid?
 296                         if (PacketSize > MAX_PACKET_SIZE) {
 297                                 #ifdef _PE_RX_DUMP_
 298                                 WBDEBUG(("Serious ERROR : Rx data size too long, size =%d\n", PacketSize));
 299                                 #endif
 300
 301                                 pWb35Rx->EP3vm_state = VM_STOP;
 302                                 pWb35Rx->Ep3ErrorCount2++;
 303                                 break;
 304                         }
 305
 306                         // Start to process Rx buffer
 307 //                      RxDes.Descriptor_ID = RxBufferId; // Due to synchronous indicate, the field doesn't necessary to use.
 308                         BufferSize -= 8; //subtract 8 byte for 35's USB header length
 309                         pRxBufferAddress += 8;
 310
 311                         RxDes.buffer_address[0] = pRxBufferAddress;
 312                         RxDes.buffer_size[0] = PacketSize;
 313                         RxDes.buffer_number = 1;
 314                         RxDes.buffer_start_index = 0;
 315                         RxDes.buffer_total_size = RxDes.buffer_size[0];
 316                         Wb35Rx_adjust(&RxDes);
 317
 318                         packet_came(pRxBufferAddress, PacketSize);
 319
 320                         // Move RxBuffer point to the next
 321                         stmp = PacketSize + 3;
 322                         stmp &= ~0x03; // 4n alignment
 323                         pRxBufferAddress += stmp;
 324                         BufferSize -= stmp;
 325                         stmp2 += stmp;
 326                 }
 327
 328                 // Reclaim resource
 329                 pWb35Rx->RxOwner[ RxBufferId ] = 1;
 330         } while (true);
 331
 332         return stmp2;
 333 }
 334
 335