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 <linux/usb.h>
12
13 #include "core.h"
14 #include "sysdef.h"
15 #include "wb35rx_f.h"
16
packet_came(struct ieee80211_hw * hw,char * pRxBufferAddress,int PacketSize)17 static void packet_came(struct ieee80211_hw *hw, char *pRxBufferAddress, int PacketSize)
18 {
19 struct wbsoft_priv *priv = hw->priv;
20 struct sk_buff *skb;
21 struct ieee80211_rx_status rx_status = {0};
22
23 if (!priv->enabled)
24 return;
25
26 skb = dev_alloc_skb(PacketSize);
27 if (!skb) {
28 printk("Not enough memory for packet, FIXME\n");
29 return;
30 }
31
32 memcpy(skb_put(skb, PacketSize),
33 pRxBufferAddress,
34 PacketSize);
35
36 /*
37 rx_status.rate = 10;
38 rx_status.channel = 1;
39 rx_status.freq = 12345;
40 rx_status.phymode = MODE_IEEE80211B;
41 */
42
43 ieee80211_rx_irqsafe(hw, skb, &rx_status);
44 }
45
Wb35Rx_adjust(PDESCRIPTOR pRxDes)46 static void Wb35Rx_adjust(PDESCRIPTOR pRxDes)
47 {
48 u32 * pRxBufferAddress;
49 u32 DecryptionMethod;
50 u32 i;
51 u16 BufferSize;
52
53 DecryptionMethod = pRxDes->R01.R01_decryption_method;
54 pRxBufferAddress = pRxDes->buffer_address[0];
55 BufferSize = pRxDes->buffer_size[0];
56
57 // Adjust the last part of data. Only data left
58 BufferSize -= 4; // For CRC-32
59 if (DecryptionMethod)
60 BufferSize -= 4;
61 if (DecryptionMethod == 3) // For CCMP
62 BufferSize -= 4;
63
64 // Adjust the IV field which after 802.11 header and ICV field.
65 if (DecryptionMethod == 1) // For WEP
66 {
67 for( i=6; i>0; i-- )
68 pRxBufferAddress[i] = pRxBufferAddress[i-1];
69 pRxDes->buffer_address[0] = pRxBufferAddress + 1;
70 BufferSize -= 4; // 4 byte for IV
71 }
72 else if( DecryptionMethod ) // For TKIP and CCMP
73 {
74 for (i=7; i>1; i--)
75 pRxBufferAddress[i] = pRxBufferAddress[i-2];
76 pRxDes->buffer_address[0] = pRxBufferAddress + 2;//Update the descriptor, shift 8 byte
77 BufferSize -= 8; // 8 byte for IV + ICV
78 }
79 pRxDes->buffer_size[0] = BufferSize;
80 }
81
Wb35Rx_indicate(struct ieee80211_hw * hw)82 static u16 Wb35Rx_indicate(struct ieee80211_hw *hw)
83 {
84 struct wbsoft_priv *priv = hw->priv;
85 phw_data_t pHwData = &priv->sHwData;
86 DESCRIPTOR RxDes;
87 PWB35RX pWb35Rx = &pHwData->Wb35Rx;
88 u8 * pRxBufferAddress;
89 u16 PacketSize;
90 u16 stmp, BufferSize, stmp2 = 0;
91 u32 RxBufferId;
92
93 // Only one thread be allowed to run into the following
94 do {
95 RxBufferId = pWb35Rx->RxProcessIndex;
96 if (pWb35Rx->RxOwner[ RxBufferId ]) //Owner by VM
97 break;
98
99 pWb35Rx->RxProcessIndex++;
100 pWb35Rx->RxProcessIndex %= MAX_USB_RX_BUFFER_NUMBER;
101
102 pRxBufferAddress = pWb35Rx->pDRx;
103 BufferSize = pWb35Rx->RxBufferSize[ RxBufferId ];
104
105 // Parse the bulkin buffer
106 while (BufferSize >= 4) {
107 if ((cpu_to_le32(*(u32 *)pRxBufferAddress) & 0x0fffffff) == RX_END_TAG) //Is ending? 921002.9.a
108 break;
109
110 // Get the R00 R01 first
111 RxDes.R00.value = le32_to_cpu(*(u32 *)pRxBufferAddress);
112 PacketSize = (u16)RxDes.R00.R00_receive_byte_count;
113 RxDes.R01.value = le32_to_cpu(*((u32 *)(pRxBufferAddress+4)));
114 // For new DMA 4k
115 if ((PacketSize & 0x03) > 0)
116 PacketSize -= 4;
117
118 // Basic check for Rx length. Is length valid?
119 if (PacketSize > MAX_PACKET_SIZE) {
120 #ifdef _PE_RX_DUMP_
121 WBDEBUG(("Serious ERROR : Rx data size too long, size =%d\n", PacketSize));
122 #endif
123
124 pWb35Rx->EP3vm_state = VM_STOP;
125 pWb35Rx->Ep3ErrorCount2++;
126 break;
127 }
128
129 // Start to process Rx buffer
130 // RxDes.Descriptor_ID = RxBufferId; // Due to synchronous indicate, the field doesn't necessary to use.
131 BufferSize -= 8; //subtract 8 byte for 35's USB header length
132 pRxBufferAddress += 8;
133
134 RxDes.buffer_address[0] = pRxBufferAddress;
135 RxDes.buffer_size[0] = PacketSize;
136 RxDes.buffer_number = 1;
137 RxDes.buffer_start_index = 0;
138 RxDes.buffer_total_size = RxDes.buffer_size[0];
139 Wb35Rx_adjust(&RxDes);
140
141 packet_came(hw, pRxBufferAddress, PacketSize);
142
143 // Move RxBuffer point to the next
144 stmp = PacketSize + 3;
145 stmp &= ~0x03; // 4n alignment
146 pRxBufferAddress += stmp;
147 BufferSize -= stmp;
148 stmp2 += stmp;
149 }
150
151 // Reclaim resource
152 pWb35Rx->RxOwner[ RxBufferId ] = 1;
153 } while (true);
154
155 return stmp2;
156 }
157
158 static void Wb35Rx(struct ieee80211_hw *hw);
159
Wb35Rx_Complete(struct urb * urb)160 static void Wb35Rx_Complete(struct urb *urb)
161 {
162 struct ieee80211_hw *hw = urb->context;
163 struct wbsoft_priv *priv = hw->priv;
164 phw_data_t pHwData = &priv->sHwData;
165 PWB35RX pWb35Rx = &pHwData->Wb35Rx;
166 u8 * pRxBufferAddress;
167 u32 SizeCheck;
168 u16 BulkLength;
169 u32 RxBufferId;
170 R00_DESCRIPTOR R00;
171
172 // Variable setting
173 pWb35Rx->EP3vm_state = VM_COMPLETED;
174 pWb35Rx->EP3VM_status = urb->status;//Store the last result of Irp
175
176 RxBufferId = pWb35Rx->CurrentRxBufferId;
177
178 pRxBufferAddress = pWb35Rx->pDRx;
179 BulkLength = (u16)urb->actual_length;
180
181 // The IRP is completed
182 pWb35Rx->EP3vm_state = VM_COMPLETED;
183
184 if (pHwData->SurpriseRemove || pHwData->HwStop) // Must be here, or RxBufferId is invalid
185 goto error;
186
187 if (pWb35Rx->rx_halt)
188 goto error;
189
190 // Start to process the data only in successful condition
191 pWb35Rx->RxOwner[ RxBufferId ] = 0; // Set the owner to driver
192 R00.value = le32_to_cpu(*(u32 *)pRxBufferAddress);
193
194 // The URB is completed, check the result
195 if (pWb35Rx->EP3VM_status != 0) {
196 #ifdef _PE_USB_STATE_DUMP_
197 WBDEBUG(("EP3 IoCompleteRoutine return error\n"));
198 DebugUsbdStatusInformation( pWb35Rx->EP3VM_status );
199 #endif
200 pWb35Rx->EP3vm_state = VM_STOP;
201 goto error;
202 }
203
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)
208 SizeCheck -= 4;
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++;
217 }
218 }
219
220 // Indicating the receiving data
221 pWb35Rx->ByteReceived += BulkLength;
222 pWb35Rx->RxBufferSize[ RxBufferId ] = BulkLength;
223
224 if (!pWb35Rx->RxOwner[ RxBufferId ])
225 Wb35Rx_indicate(hw);
226
227 kfree(pWb35Rx->pDRx);
228 // Do the next receive
229 Wb35Rx(hw);
230 return;
231
232 error:
233 pWb35Rx->RxOwner[ RxBufferId ] = 1; // Set the owner to hardware
234 atomic_dec(&pWb35Rx->RxFireCounter);
235 pWb35Rx->EP3vm_state = VM_STOP;
236 }
237
238 // This function cannot reentrain
Wb35Rx(struct ieee80211_hw * hw)239 static void Wb35Rx(struct ieee80211_hw *hw)
240 {
241 struct wbsoft_priv *priv = hw->priv;
242 phw_data_t pHwData = &priv->sHwData;
243 PWB35RX pWb35Rx = &pHwData->Wb35Rx;
244 u8 * pRxBufferAddress;
245 struct urb *urb = pWb35Rx->RxUrb;
246 int retv;
247 u32 RxBufferId;
248
249 //
250 // Issuing URB
251 //
252 if (pHwData->SurpriseRemove || pHwData->HwStop)
253 goto error;
254
255 if (pWb35Rx->rx_halt)
256 goto error;
257
258 // Get RxBuffer's ID
259 RxBufferId = pWb35Rx->RxBufferId;
260 if (!pWb35Rx->RxOwner[RxBufferId]) {
261 // It's impossible to run here.
262 #ifdef _PE_RX_DUMP_
263 WBDEBUG(("Rx driver fifo unavailable\n"));
264 #endif
265 goto error;
266 }
267
268 // Update buffer point, then start to bulkin the data from USB
269 pWb35Rx->RxBufferId++;
270 pWb35Rx->RxBufferId %= MAX_USB_RX_BUFFER_NUMBER;
271
272 pWb35Rx->CurrentRxBufferId = RxBufferId;
273
274 pWb35Rx->pDRx = kzalloc(MAX_USB_RX_BUFFER, GFP_ATOMIC);
275 if (!pWb35Rx->pDRx) {
276 printk("w35und: Rx memory alloc failed\n");
277 goto error;
278 }
279 pRxBufferAddress = pWb35Rx->pDRx;
280
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);
285
286 pWb35Rx->EP3vm_state = VM_RUNNING;
287
288 retv = usb_submit_urb(urb, GFP_ATOMIC);
289
290 if (retv != 0) {
291 printk("Rx URB sending error\n");
292 goto error;
293 }
294 return;
295
296 error:
297 // VM stop
298 pWb35Rx->EP3vm_state = VM_STOP;
299 atomic_dec(&pWb35Rx->RxFireCounter);
300 }
301
Wb35Rx_start(struct ieee80211_hw * hw)302 void Wb35Rx_start(struct ieee80211_hw *hw)
303 {
304 struct wbsoft_priv *priv = hw->priv;
305 phw_data_t pHwData = &priv->sHwData;
306 PWB35RX pWb35Rx = &pHwData->Wb35Rx;
307
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;
311 Wb35Rx(hw);
312 } else
313 atomic_dec(&pWb35Rx->RxFireCounter);
314 }
315
316 //=====================================================================================
Wb35Rx_reset_descriptor(phw_data_t pHwData)317 static void Wb35Rx_reset_descriptor( phw_data_t pHwData )
318 {
319 PWB35RX pWb35Rx = &pHwData->Wb35Rx;
320 u32 i;
321
322 pWb35Rx->ByteReceived = 0;
323 pWb35Rx->RxProcessIndex = 0;
324 pWb35Rx->RxBufferId = 0;
325 pWb35Rx->EP3vm_state = VM_STOP;
326 pWb35Rx->rx_halt = 0;
327
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;
331 }
332
Wb35Rx_initial(phw_data_t pHwData)333 unsigned char Wb35Rx_initial(phw_data_t pHwData)
334 {
335 PWB35RX pWb35Rx = &pHwData->Wb35Rx;
336
337 // Initial the Buffer Queue
338 Wb35Rx_reset_descriptor( pHwData );
339
340 pWb35Rx->RxUrb = usb_alloc_urb(0, GFP_ATOMIC);
341 return (!!pWb35Rx->RxUrb);
342 }
343
Wb35Rx_stop(phw_data_t pHwData)344 void Wb35Rx_stop(phw_data_t pHwData)
345 {
346 PWB35RX pWb35Rx = &pHwData->Wb35Rx;
347
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
351 #ifdef _PE_RX_DUMP_
352 WBDEBUG(("EP3 Rx stop\n"));
353 #endif
354 }
355 }
356
357 // Needs process context
Wb35Rx_destroy(phw_data_t pHwData)358 void Wb35Rx_destroy(phw_data_t pHwData)
359 {
360 PWB35RX pWb35Rx = &pHwData->Wb35Rx;
361
362 do {
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
366
367 if (pWb35Rx->RxUrb)
368 usb_free_urb( pWb35Rx->RxUrb );
369 #ifdef _PE_RX_DUMP_
370 WBDEBUG(("Wb35Rx_destroy OK\n"));
371 #endif
372 }
373
374