1 //============================================================================
2 // Copyright (c) 1996-2002 Winbond Electronic Corporation
8 // Processing the Rx message from down layer
10 //============================================================================
11 #include <linux/usb.h>
17 static void packet_came(struct ieee80211_hw *hw, char *pRxBufferAddress, int PacketSize)
19 struct wbsoft_priv *priv = hw->priv;
21 struct ieee80211_rx_status rx_status = {0};
26 skb = dev_alloc_skb(PacketSize);
28 printk("Not enough memory for packet, FIXME\n");
32 memcpy(skb_put(skb, PacketSize),
38 rx_status.channel = 1;
39 rx_status.freq = 12345;
40 rx_status.phymode = MODE_IEEE80211B;
43 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
44 ieee80211_rx_irqsafe(hw, skb);
47 static void Wb35Rx_adjust(struct wb35_descriptor *pRxDes)
49 u32 * pRxBufferAddress;
54 DecryptionMethod = pRxDes->R01.R01_decryption_method;
55 pRxBufferAddress = pRxDes->buffer_address[0];
56 BufferSize = pRxDes->buffer_size[0];
58 // Adjust the last part of data. Only data left
59 BufferSize -= 4; // For CRC-32
62 if (DecryptionMethod == 3) // For CCMP
65 // Adjust the IV field which after 802.11 header and ICV field.
66 if (DecryptionMethod == 1) // For WEP
69 pRxBufferAddress[i] = pRxBufferAddress[i-1];
70 pRxDes->buffer_address[0] = pRxBufferAddress + 1;
71 BufferSize -= 4; // 4 byte for IV
73 else if( DecryptionMethod ) // For TKIP and CCMP
76 pRxBufferAddress[i] = pRxBufferAddress[i-2];
77 pRxDes->buffer_address[0] = pRxBufferAddress + 2;//Update the descriptor, shift 8 byte
78 BufferSize -= 8; // 8 byte for IV + ICV
80 pRxDes->buffer_size[0] = BufferSize;
83 static u16 Wb35Rx_indicate(struct ieee80211_hw *hw)
85 struct wbsoft_priv *priv = hw->priv;
86 struct hw_data * pHwData = &priv->sHwData;
87 struct wb35_descriptor RxDes;
88 struct wb35_rx *pWb35Rx = &pHwData->Wb35Rx;
89 u8 * pRxBufferAddress;
91 u16 stmp, BufferSize, stmp2 = 0;
94 // Only one thread be allowed to run into the following
96 RxBufferId = pWb35Rx->RxProcessIndex;
97 if (pWb35Rx->RxOwner[ RxBufferId ]) //Owner by VM
100 pWb35Rx->RxProcessIndex++;
101 pWb35Rx->RxProcessIndex %= MAX_USB_RX_BUFFER_NUMBER;
103 pRxBufferAddress = pWb35Rx->pDRx;
104 BufferSize = pWb35Rx->RxBufferSize[ RxBufferId ];
106 // Parse the bulkin buffer
107 while (BufferSize >= 4) {
108 if ((cpu_to_le32(*(u32 *)pRxBufferAddress) & 0x0fffffff) == RX_END_TAG) //Is ending? 921002.9.a
111 // Get the R00 R01 first
112 RxDes.R00.value = le32_to_cpu(*(u32 *)pRxBufferAddress);
113 PacketSize = (u16)RxDes.R00.R00_receive_byte_count;
114 RxDes.R01.value = le32_to_cpu(*((u32 *)(pRxBufferAddress+4)));
116 if ((PacketSize & 0x03) > 0)
119 // Basic check for Rx length. Is length valid?
120 if (PacketSize > MAX_PACKET_SIZE) {
122 printk("Serious ERROR : Rx data size too long, size =%d\n", PacketSize);
125 pWb35Rx->EP3vm_state = VM_STOP;
126 pWb35Rx->Ep3ErrorCount2++;
130 // Start to process Rx buffer
131 // RxDes.Descriptor_ID = RxBufferId; // Due to synchronous indicate, the field doesn't necessary to use.
132 BufferSize -= 8; //subtract 8 byte for 35's USB header length
133 pRxBufferAddress += 8;
135 RxDes.buffer_address[0] = pRxBufferAddress;
136 RxDes.buffer_size[0] = PacketSize;
137 RxDes.buffer_number = 1;
138 RxDes.buffer_start_index = 0;
139 RxDes.buffer_total_size = RxDes.buffer_size[0];
140 Wb35Rx_adjust(&RxDes);
142 packet_came(hw, pRxBufferAddress, PacketSize);
144 // Move RxBuffer point to the next
145 stmp = PacketSize + 3;
146 stmp &= ~0x03; // 4n alignment
147 pRxBufferAddress += stmp;
153 pWb35Rx->RxOwner[ RxBufferId ] = 1;
159 static void Wb35Rx(struct ieee80211_hw *hw);
161 static void Wb35Rx_Complete(struct urb *urb)
163 struct ieee80211_hw *hw = urb->context;
164 struct wbsoft_priv *priv = hw->priv;
165 struct hw_data * pHwData = &priv->sHwData;
166 struct wb35_rx *pWb35Rx = &pHwData->Wb35Rx;
167 u8 * pRxBufferAddress;
174 pWb35Rx->EP3vm_state = VM_COMPLETED;
175 pWb35Rx->EP3VM_status = urb->status;//Store the last result of Irp
177 RxBufferId = pWb35Rx->CurrentRxBufferId;
179 pRxBufferAddress = pWb35Rx->pDRx;
180 BulkLength = (u16)urb->actual_length;
182 // The IRP is completed
183 pWb35Rx->EP3vm_state = VM_COMPLETED;
185 if (pHwData->SurpriseRemove || pHwData->HwStop) // Must be here, or RxBufferId is invalid
188 if (pWb35Rx->rx_halt)
191 // Start to process the data only in successful condition
192 pWb35Rx->RxOwner[ RxBufferId ] = 0; // Set the owner to driver
193 R00.value = le32_to_cpu(*(u32 *)pRxBufferAddress);
195 // The URB is completed, check the result
196 if (pWb35Rx->EP3VM_status != 0) {
197 #ifdef _PE_USB_STATE_DUMP_
198 printk("EP3 IoCompleteRoutine return error\n");
200 pWb35Rx->EP3vm_state = VM_STOP;
204 // 20060220 For recovering. check if operating in single USB mode
205 if (!HAL_USB_MODE_BURST(pHwData)) {
206 SizeCheck = R00.R00_receive_byte_count; //20060926 anson's endian
207 if ((SizeCheck & 0x03) > 0)
209 SizeCheck = (SizeCheck + 3) & ~0x03;
210 SizeCheck += 12; // 8 + 4 badbeef
211 if ((BulkLength > 1600) ||
212 (SizeCheck > 1600) ||
213 (BulkLength != SizeCheck) ||
214 (BulkLength == 0)) { // Add for fail Urb
215 pWb35Rx->EP3vm_state = VM_STOP;
216 pWb35Rx->Ep3ErrorCount2++;
220 // Indicating the receiving data
221 pWb35Rx->ByteReceived += BulkLength;
222 pWb35Rx->RxBufferSize[ RxBufferId ] = BulkLength;
224 if (!pWb35Rx->RxOwner[ RxBufferId ])
227 kfree(pWb35Rx->pDRx);
228 // Do the next receive
233 pWb35Rx->RxOwner[ RxBufferId ] = 1; // Set the owner to hardware
234 atomic_dec(&pWb35Rx->RxFireCounter);
235 pWb35Rx->EP3vm_state = VM_STOP;
238 // This function cannot reentrain
239 static void Wb35Rx(struct ieee80211_hw *hw)
241 struct wbsoft_priv *priv = hw->priv;
242 struct hw_data * pHwData = &priv->sHwData;
243 struct wb35_rx *pWb35Rx = &pHwData->Wb35Rx;
244 u8 * pRxBufferAddress;
245 struct urb *urb = pWb35Rx->RxUrb;
252 if (pHwData->SurpriseRemove || pHwData->HwStop)
255 if (pWb35Rx->rx_halt)
259 RxBufferId = pWb35Rx->RxBufferId;
260 if (!pWb35Rx->RxOwner[RxBufferId]) {
261 // It's impossible to run here.
263 printk("Rx driver fifo unavailable\n");
268 // Update buffer point, then start to bulkin the data from USB
269 pWb35Rx->RxBufferId++;
270 pWb35Rx->RxBufferId %= MAX_USB_RX_BUFFER_NUMBER;
272 pWb35Rx->CurrentRxBufferId = RxBufferId;
274 pWb35Rx->pDRx = kzalloc(MAX_USB_RX_BUFFER, GFP_ATOMIC);
275 if (!pWb35Rx->pDRx) {
276 printk("w35und: Rx memory alloc failed\n");
279 pRxBufferAddress = pWb35Rx->pDRx;
281 usb_fill_bulk_urb(urb, pHwData->WbUsb.udev,
282 usb_rcvbulkpipe(pHwData->WbUsb.udev, 3),
283 pRxBufferAddress, MAX_USB_RX_BUFFER,
284 Wb35Rx_Complete, hw);
286 pWb35Rx->EP3vm_state = VM_RUNNING;
288 retv = usb_submit_urb(urb, GFP_ATOMIC);
291 printk("Rx URB sending error\n");
298 pWb35Rx->EP3vm_state = VM_STOP;
299 atomic_dec(&pWb35Rx->RxFireCounter);
302 void Wb35Rx_start(struct ieee80211_hw *hw)
304 struct wbsoft_priv *priv = hw->priv;
305 struct hw_data * pHwData = &priv->sHwData;
306 struct wb35_rx *pWb35Rx = &pHwData->Wb35Rx;
308 // Allow only one thread to run into the Wb35Rx() function
309 if (atomic_inc_return(&pWb35Rx->RxFireCounter) == 1) {
310 pWb35Rx->EP3vm_state = VM_RUNNING;
313 atomic_dec(&pWb35Rx->RxFireCounter);
316 //=====================================================================================
317 static void Wb35Rx_reset_descriptor( struct hw_data * pHwData )
319 struct wb35_rx *pWb35Rx = &pHwData->Wb35Rx;
322 pWb35Rx->ByteReceived = 0;
323 pWb35Rx->RxProcessIndex = 0;
324 pWb35Rx->RxBufferId = 0;
325 pWb35Rx->EP3vm_state = VM_STOP;
326 pWb35Rx->rx_halt = 0;
328 // Initial the Queue. The last buffer is reserved for used if the Rx resource is unavailable.
329 for( i=0; i<MAX_USB_RX_BUFFER_NUMBER; i++ )
330 pWb35Rx->RxOwner[i] = 1;
333 unsigned char Wb35Rx_initial(struct hw_data * pHwData)
335 struct wb35_rx *pWb35Rx = &pHwData->Wb35Rx;
337 // Initial the Buffer Queue
338 Wb35Rx_reset_descriptor( pHwData );
340 pWb35Rx->RxUrb = usb_alloc_urb(0, GFP_ATOMIC);
341 return (!!pWb35Rx->RxUrb);
344 void Wb35Rx_stop(struct hw_data * pHwData)
346 struct wb35_rx *pWb35Rx = &pHwData->Wb35Rx;
348 // Canceling the Irp if already sends it out.
349 if (pWb35Rx->EP3vm_state == VM_RUNNING) {
350 usb_unlink_urb( pWb35Rx->RxUrb ); // Only use unlink, let Wb35Rx_destroy to free them
352 printk("EP3 Rx stop\n");
357 // Needs process context
358 void Wb35Rx_destroy(struct hw_data * pHwData)
360 struct wb35_rx *pWb35Rx = &pHwData->Wb35Rx;
363 msleep(10); // Delay for waiting function enter 940623.1.a
364 } while (pWb35Rx->EP3vm_state != VM_STOP);
365 msleep(10); // Delay for waiting function exit 940623.1.b
368 usb_free_urb( pWb35Rx->RxUrb );
370 printk("Wb35Rx_destroy OK\n");