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path: root/drivers/staging/winbond/wb35rx.c
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Diffstat (limited to 'drivers/staging/winbond/wb35rx.c')
-rw-r--r--drivers/staging/winbond/wb35rx.c373
1 files changed, 373 insertions, 0 deletions
diff --git a/drivers/staging/winbond/wb35rx.c b/drivers/staging/winbond/wb35rx.c
new file mode 100644
index 00000000000..7f8b6d749a4
--- /dev/null
+++ b/drivers/staging/winbond/wb35rx.c
@@ -0,0 +1,373 @@
+//============================================================================
+// 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"
+
+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);
+}
+
+static 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 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;
+}
+
+static void Wb35Rx(struct ieee80211_hw *hw);
+
+static 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;
+}
+
+// This function cannot reentrain
+static 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_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);
+}
+
+//=====================================================================================
+static 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;
+}
+
+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
+}
+