| //============================================================================ |
| // Copyright (c) 1996-2002 Winbond Electronic Corporation |
| // |
| // Module Name: |
| // Wb35Rx.c |
| // |
| // Abstract: |
| // Processing the Rx message from down layer |
| // |
| //============================================================================ |
| #include <linux/usb.h> |
| |
| #include "core.h" |
| #include "sysdef.h" |
| #include "wb35rx_f.h" |
| |
| void Wb35Rx_start(struct ieee80211_hw *hw) |
| { |
| struct wbsoft_priv *priv = hw->priv; |
| phw_data_t pHwData = &priv->sHwData; |
| PWB35RX pWb35Rx = &pHwData->Wb35Rx; |
| |
| // Allow only one thread to run into the Wb35Rx() function |
| if (atomic_inc_return(&pWb35Rx->RxFireCounter) == 1) { |
| pWb35Rx->EP3vm_state = VM_RUNNING; |
| Wb35Rx(hw); |
| } else |
| atomic_dec(&pWb35Rx->RxFireCounter); |
| } |
| |
| // This function cannot reentrain |
| void Wb35Rx(struct ieee80211_hw *hw) |
| { |
| struct wbsoft_priv *priv = hw->priv; |
| phw_data_t pHwData = &priv->sHwData; |
| PWB35RX pWb35Rx = &pHwData->Wb35Rx; |
| u8 * pRxBufferAddress; |
| struct urb *urb = pWb35Rx->RxUrb; |
| int retv; |
| u32 RxBufferId; |
| |
| // |
| // Issuing URB |
| // |
| if (pHwData->SurpriseRemove || pHwData->HwStop) |
| goto error; |
| |
| if (pWb35Rx->rx_halt) |
| goto error; |
| |
| // Get RxBuffer's ID |
| RxBufferId = pWb35Rx->RxBufferId; |
| if (!pWb35Rx->RxOwner[RxBufferId]) { |
| // It's impossible to run here. |
| #ifdef _PE_RX_DUMP_ |
| WBDEBUG(("Rx driver fifo unavailable\n")); |
| #endif |
| goto error; |
| } |
| |
| // Update buffer point, then start to bulkin the data from USB |
| pWb35Rx->RxBufferId++; |
| pWb35Rx->RxBufferId %= MAX_USB_RX_BUFFER_NUMBER; |
| |
| pWb35Rx->CurrentRxBufferId = RxBufferId; |
| |
| pWb35Rx->pDRx = kzalloc(MAX_USB_RX_BUFFER, GFP_ATOMIC); |
| if (!pWb35Rx->pDRx) { |
| printk("w35und: Rx memory alloc failed\n"); |
| goto error; |
| } |
| pRxBufferAddress = pWb35Rx->pDRx; |
| |
| usb_fill_bulk_urb(urb, pHwData->WbUsb.udev, |
| usb_rcvbulkpipe(pHwData->WbUsb.udev, 3), |
| pRxBufferAddress, MAX_USB_RX_BUFFER, |
| Wb35Rx_Complete, hw); |
| |
| pWb35Rx->EP3vm_state = VM_RUNNING; |
| |
| retv = usb_submit_urb(urb, GFP_ATOMIC); |
| |
| if (retv != 0) { |
| printk("Rx URB sending error\n"); |
| goto error; |
| } |
| return; |
| |
| error: |
| // VM stop |
| pWb35Rx->EP3vm_state = VM_STOP; |
| atomic_dec(&pWb35Rx->RxFireCounter); |
| } |
| |
| void Wb35Rx_Complete(struct urb *urb) |
| { |
| struct ieee80211_hw *hw = urb->context; |
| struct wbsoft_priv *priv = hw->priv; |
| phw_data_t pHwData = &priv->sHwData; |
| PWB35RX pWb35Rx = &pHwData->Wb35Rx; |
| u8 * pRxBufferAddress; |
| u32 SizeCheck; |
| u16 BulkLength; |
| u32 RxBufferId; |
| R00_DESCRIPTOR R00; |
| |
| // Variable setting |
| pWb35Rx->EP3vm_state = VM_COMPLETED; |
| pWb35Rx->EP3VM_status = urb->status;//Store the last result of Irp |
| |
| RxBufferId = pWb35Rx->CurrentRxBufferId; |
| |
| pRxBufferAddress = pWb35Rx->pDRx; |
| BulkLength = (u16)urb->actual_length; |
| |
| // The IRP is completed |
| pWb35Rx->EP3vm_state = VM_COMPLETED; |
| |
| if (pHwData->SurpriseRemove || pHwData->HwStop) // Must be here, or RxBufferId is invalid |
| goto error; |
| |
| if (pWb35Rx->rx_halt) |
| goto error; |
| |
| // Start to process the data only in successful condition |
| pWb35Rx->RxOwner[ RxBufferId ] = 0; // Set the owner to driver |
| R00.value = le32_to_cpu(*(u32 *)pRxBufferAddress); |
| |
| // The URB is completed, check the result |
| if (pWb35Rx->EP3VM_status != 0) { |
| #ifdef _PE_USB_STATE_DUMP_ |
| WBDEBUG(("EP3 IoCompleteRoutine return error\n")); |
| DebugUsbdStatusInformation( pWb35Rx->EP3VM_status ); |
| #endif |
| pWb35Rx->EP3vm_state = VM_STOP; |
| goto error; |
| } |
| |
| // 20060220 For recovering. check if operating in single USB mode |
| if (!HAL_USB_MODE_BURST(pHwData)) { |
| SizeCheck = R00.R00_receive_byte_count; //20060926 anson's endian |
| if ((SizeCheck & 0x03) > 0) |
| SizeCheck -= 4; |
| SizeCheck = (SizeCheck + 3) & ~0x03; |
| SizeCheck += 12; // 8 + 4 badbeef |
| if ((BulkLength > 1600) || |
| (SizeCheck > 1600) || |
| (BulkLength != SizeCheck) || |
| (BulkLength == 0)) { // Add for fail Urb |
| pWb35Rx->EP3vm_state = VM_STOP; |
| pWb35Rx->Ep3ErrorCount2++; |
| } |
| } |
| |
| // Indicating the receiving data |
| pWb35Rx->ByteReceived += BulkLength; |
| pWb35Rx->RxBufferSize[ RxBufferId ] = BulkLength; |
| |
| if (!pWb35Rx->RxOwner[ RxBufferId ]) |
| Wb35Rx_indicate(hw); |
| |
| kfree(pWb35Rx->pDRx); |
| // Do the next receive |
| Wb35Rx(hw); |
| return; |
| |
| error: |
| pWb35Rx->RxOwner[ RxBufferId ] = 1; // Set the owner to hardware |
| atomic_dec(&pWb35Rx->RxFireCounter); |
| pWb35Rx->EP3vm_state = VM_STOP; |
| } |
| |
| //===================================================================================== |
| unsigned char Wb35Rx_initial(phw_data_t pHwData) |
| { |
| PWB35RX pWb35Rx = &pHwData->Wb35Rx; |
| |
| // Initial the Buffer Queue |
| Wb35Rx_reset_descriptor( pHwData ); |
| |
| pWb35Rx->RxUrb = usb_alloc_urb(0, GFP_ATOMIC); |
| return (!!pWb35Rx->RxUrb); |
| } |
| |
| void Wb35Rx_stop(phw_data_t pHwData) |
| { |
| PWB35RX pWb35Rx = &pHwData->Wb35Rx; |
| |
| // Canceling the Irp if already sends it out. |
| if (pWb35Rx->EP3vm_state == VM_RUNNING) { |
| usb_unlink_urb( pWb35Rx->RxUrb ); // Only use unlink, let Wb35Rx_destroy to free them |
| #ifdef _PE_RX_DUMP_ |
| WBDEBUG(("EP3 Rx stop\n")); |
| #endif |
| } |
| } |
| |
| // Needs process context |
| void Wb35Rx_destroy(phw_data_t pHwData) |
| { |
| PWB35RX pWb35Rx = &pHwData->Wb35Rx; |
| |
| do { |
| msleep(10); // Delay for waiting function enter 940623.1.a |
| } while (pWb35Rx->EP3vm_state != VM_STOP); |
| msleep(10); // Delay for waiting function exit 940623.1.b |
| |
| if (pWb35Rx->RxUrb) |
| usb_free_urb( pWb35Rx->RxUrb ); |
| #ifdef _PE_RX_DUMP_ |
| WBDEBUG(("Wb35Rx_destroy OK\n")); |
| #endif |
| } |
| |
| void Wb35Rx_reset_descriptor( phw_data_t pHwData ) |
| { |
| PWB35RX pWb35Rx = &pHwData->Wb35Rx; |
| u32 i; |
| |
| pWb35Rx->ByteReceived = 0; |
| pWb35Rx->RxProcessIndex = 0; |
| pWb35Rx->RxBufferId = 0; |
| pWb35Rx->EP3vm_state = VM_STOP; |
| pWb35Rx->rx_halt = 0; |
| |
| // Initial the Queue. The last buffer is reserved for used if the Rx resource is unavailable. |
| for( i=0; i<MAX_USB_RX_BUFFER_NUMBER; i++ ) |
| pWb35Rx->RxOwner[i] = 1; |
| } |
| |
| void Wb35Rx_adjust(PDESCRIPTOR pRxDes) |
| { |
| u32 * pRxBufferAddress; |
| u32 DecryptionMethod; |
| u32 i; |
| u16 BufferSize; |
| |
| DecryptionMethod = pRxDes->R01.R01_decryption_method; |
| pRxBufferAddress = pRxDes->buffer_address[0]; |
| BufferSize = pRxDes->buffer_size[0]; |
| |
| // Adjust the last part of data. Only data left |
| BufferSize -= 4; // For CRC-32 |
| if (DecryptionMethod) |
| BufferSize -= 4; |
| if (DecryptionMethod == 3) // For CCMP |
| BufferSize -= 4; |
| |
| // Adjust the IV field which after 802.11 header and ICV field. |
| if (DecryptionMethod == 1) // For WEP |
| { |
| for( i=6; i>0; i-- ) |
| pRxBufferAddress[i] = pRxBufferAddress[i-1]; |
| pRxDes->buffer_address[0] = pRxBufferAddress + 1; |
| BufferSize -= 4; // 4 byte for IV |
| } |
| else if( DecryptionMethod ) // For TKIP and CCMP |
| { |
| for (i=7; i>1; i--) |
| pRxBufferAddress[i] = pRxBufferAddress[i-2]; |
| pRxDes->buffer_address[0] = pRxBufferAddress + 2;//Update the descriptor, shift 8 byte |
| BufferSize -= 8; // 8 byte for IV + ICV |
| } |
| pRxDes->buffer_size[0] = BufferSize; |
| } |
| |
| static void packet_came(struct ieee80211_hw *hw, char *pRxBufferAddress, int PacketSize) |
| { |
| struct wbsoft_priv *priv = hw->priv; |
| struct sk_buff *skb; |
| struct ieee80211_rx_status rx_status = {0}; |
| |
| if (!priv->enabled) |
| return; |
| |
| skb = dev_alloc_skb(PacketSize); |
| if (!skb) { |
| printk("Not enough memory for packet, FIXME\n"); |
| return; |
| } |
| |
| memcpy(skb_put(skb, PacketSize), |
| pRxBufferAddress, |
| PacketSize); |
| |
| /* |
| rx_status.rate = 10; |
| rx_status.channel = 1; |
| rx_status.freq = 12345; |
| rx_status.phymode = MODE_IEEE80211B; |
| */ |
| |
| ieee80211_rx_irqsafe(hw, skb, &rx_status); |
| } |
| |
| u16 Wb35Rx_indicate(struct ieee80211_hw *hw) |
| { |
| struct wbsoft_priv *priv = hw->priv; |
| phw_data_t pHwData = &priv->sHwData; |
| DESCRIPTOR RxDes; |
| PWB35RX pWb35Rx = &pHwData->Wb35Rx; |
| u8 * pRxBufferAddress; |
| u16 PacketSize; |
| u16 stmp, BufferSize, stmp2 = 0; |
| u32 RxBufferId; |
| |
| // Only one thread be allowed to run into the following |
| do { |
| RxBufferId = pWb35Rx->RxProcessIndex; |
| if (pWb35Rx->RxOwner[ RxBufferId ]) //Owner by VM |
| break; |
| |
| pWb35Rx->RxProcessIndex++; |
| pWb35Rx->RxProcessIndex %= MAX_USB_RX_BUFFER_NUMBER; |
| |
| pRxBufferAddress = pWb35Rx->pDRx; |
| BufferSize = pWb35Rx->RxBufferSize[ RxBufferId ]; |
| |
| // Parse the bulkin buffer |
| while (BufferSize >= 4) { |
| if ((cpu_to_le32(*(u32 *)pRxBufferAddress) & 0x0fffffff) == RX_END_TAG) //Is ending? 921002.9.a |
| break; |
| |
| // Get the R00 R01 first |
| RxDes.R00.value = le32_to_cpu(*(u32 *)pRxBufferAddress); |
| PacketSize = (u16)RxDes.R00.R00_receive_byte_count; |
| RxDes.R01.value = le32_to_cpu(*((u32 *)(pRxBufferAddress+4))); |
| // For new DMA 4k |
| if ((PacketSize & 0x03) > 0) |
| PacketSize -= 4; |
| |
| // Basic check for Rx length. Is length valid? |
| if (PacketSize > MAX_PACKET_SIZE) { |
| #ifdef _PE_RX_DUMP_ |
| WBDEBUG(("Serious ERROR : Rx data size too long, size =%d\n", PacketSize)); |
| #endif |
| |
| pWb35Rx->EP3vm_state = VM_STOP; |
| pWb35Rx->Ep3ErrorCount2++; |
| break; |
| } |
| |
| // Start to process Rx buffer |
| // RxDes.Descriptor_ID = RxBufferId; // Due to synchronous indicate, the field doesn't necessary to use. |
| BufferSize -= 8; //subtract 8 byte for 35's USB header length |
| pRxBufferAddress += 8; |
| |
| RxDes.buffer_address[0] = pRxBufferAddress; |
| RxDes.buffer_size[0] = PacketSize; |
| RxDes.buffer_number = 1; |
| RxDes.buffer_start_index = 0; |
| RxDes.buffer_total_size = RxDes.buffer_size[0]; |
| Wb35Rx_adjust(&RxDes); |
| |
| packet_came(hw, pRxBufferAddress, PacketSize); |
| |
| // Move RxBuffer point to the next |
| stmp = PacketSize + 3; |
| stmp &= ~0x03; // 4n alignment |
| pRxBufferAddress += stmp; |
| BufferSize -= stmp; |
| stmp2 += stmp; |
| } |
| |
| // Reclaim resource |
| pWb35Rx->RxOwner[ RxBufferId ] = 1; |
| } while (true); |
| |
| return stmp2; |
| } |
| |
| |