[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / staging / winbond / wb35rx.c

//============================================================================
//  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_
				printk("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_
		printk("EP3 IoCompleteRoutine return error\n");
		#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_
		printk("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_
		printk("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_
	printk("Wb35Rx_destroy OK\n");
	#endif
}
Commit	Line	Data
66101de1 PM	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	//============================================================================
80aba536 PE	11	#include <linux/usb.h>
80aba536 PE	12
7fff1316	13	#include "core.h"
66101de1	14	#include "sysdef.h"
80aba536	15	#include "wb35rx_f.h"
66101de1	16
c139a814	17	static void packet_came(struct ieee80211_hw hw, char pRxBufferAddress, int PacketSize)
66101de1	18	{
7fff1316	19	struct wbsoft_priv *priv = hw->priv;
c139a814 PE	20	struct sk_buff *skb;
c139a814 PE	21	struct ieee80211_rx_status rx_status = {0};
66101de1	22
c139a814 PE	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);
66101de1 PM	44	}
66101de1 PM	45
c139a814 PE	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
	82	static u16 Wb35Rx_indicate(struct ieee80211_hw *hw)
66101de1	83	{
7fff1316 PE	84	struct wbsoft_priv *priv = hw->priv;
7fff1316 PE	85	phw_data_t pHwData = &priv->sHwData;
c139a814	86	DESCRIPTOR RxDes;
66101de1	87	PWB35RX pWb35Rx = &pHwData->Wb35Rx;
c139a814 PE	88	u8 * pRxBufferAddress;
	89	u16 PacketSize;
	90	u16 stmp, BufferSize, stmp2 = 0;
	91	u32 RxBufferId;
66101de1	92
c139a814 PE	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;
dc7e04fe	98
c139a814 PE	99	pWb35Rx->RxProcessIndex++;
c139a814 PE	100	pWb35Rx->RxProcessIndex %= MAX_USB_RX_BUFFER_NUMBER;
dc7e04fe	101
c139a814 PE	102	pRxBufferAddress = pWb35Rx->pDRx;
c139a814 PE	103	BufferSize = pWb35Rx->RxBufferSize[ RxBufferId ];
dc7e04fe	104
c139a814 PE	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;
dc7e04fe	109
c139a814 PE	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;
dc7e04fe	117
c139a814 PE	118	// Basic check for Rx length. Is length valid?
	119	if (PacketSize > MAX_PACKET_SIZE) {
	120	#ifdef _PE_RX_DUMP_
0c59dbaa	121	printk("Serious ERROR : Rx data size too long, size =%d\n", PacketSize);
c139a814	122	#endif
dc7e04fe	123
c139a814 PE	124	pWb35Rx->EP3vm_state = VM_STOP;
	125	pWb35Rx->Ep3ErrorCount2++;
	126	break;
	127	}
dc7e04fe	128
c139a814 PE	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;
dc7e04fe	133
c139a814 PE	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);
dc7e04fe	140
c139a814	141	packet_came(hw, pRxBufferAddress, PacketSize);
dc7e04fe	142
c139a814 PE	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;
66101de1 PM	156	}
66101de1 PM	157
c139a814 PE	158	static void Wb35Rx(struct ieee80211_hw *hw);
	159
	160	static void Wb35Rx_Complete(struct urb *urb)
66101de1	161	{
7fff1316 PE	162	struct ieee80211_hw *hw = urb->context;
	163	struct wbsoft_priv *priv = hw->priv;
	164	phw_data_t pHwData = &priv->sHwData;
66101de1	165	PWB35RX pWb35Rx = &pHwData->Wb35Rx;
8b384e0c	166	u8 * pRxBufferAddress;
66101de1 PM	167	u32 SizeCheck;
	168	u16 BulkLength;
	169	u32 RxBufferId;
	170	R00_DESCRIPTOR R00;
	171
	172	// Variable setting
	173	pWb35Rx->EP3vm_state = VM_COMPLETED;
a55a89b1	174	pWb35Rx->EP3VM_status = urb->status;//Store the last result of Irp
66101de1	175
dc7e04fe	176	RxBufferId = pWb35Rx->CurrentRxBufferId;
66101de1	177
dc7e04fe	178	pRxBufferAddress = pWb35Rx->pDRx;
a55a89b1	179	BulkLength = (u16)urb->actual_length;
66101de1	180
dc7e04fe PE	181	// The IRP is completed
dc7e04fe PE	182	pWb35Rx->EP3vm_state = VM_COMPLETED;
66101de1	183
dc7e04fe PE	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_
0c59dbaa	197	printk("EP3 IoCompleteRoutine return error\n");
dc7e04fe PE	198	#endif
	199	pWb35Rx->EP3vm_state = VM_STOP;
	200	goto error;
	201	}
	202
	203	// 20060220 For recovering. check if operating in single USB mode
	204	if (!HAL_USB_MODE_BURST(pHwData)) {
	205	SizeCheck = R00.R00_receive_byte_count; //20060926 anson's endian
	206	if ((SizeCheck & 0x03) > 0)
	207	SizeCheck -= 4;
	208	SizeCheck = (SizeCheck + 3) & ~0x03;
	209	SizeCheck += 12; // 8 + 4 badbeef
	210	if ((BulkLength > 1600) \|\|
	211	(SizeCheck > 1600) \|\|
	212	(BulkLength != SizeCheck) \|\|
	213	(BulkLength == 0)) { // Add for fail Urb
66101de1	214	pWb35Rx->EP3vm_state = VM_STOP;
dc7e04fe	215	pWb35Rx->Ep3ErrorCount2++;
66101de1	216	}
dc7e04fe	217	}
66101de1	218
dc7e04fe PE	219	// Indicating the receiving data
	220	pWb35Rx->ByteReceived += BulkLength;
	221	pWb35Rx->RxBufferSize[ RxBufferId ] = BulkLength;
66101de1	222
dc7e04fe	223	if (!pWb35Rx->RxOwner[ RxBufferId ])
7fff1316	224	Wb35Rx_indicate(hw);
66101de1	225
dc7e04fe PE	226	kfree(pWb35Rx->pDRx);
dc7e04fe PE	227	// Do the next receive
7fff1316	228	Wb35Rx(hw);
dc7e04fe	229	return;
66101de1	230
dc7e04fe	231	error:
66101de1	232	pWb35Rx->RxOwner[ RxBufferId ] = 1; // Set the owner to hardware
44e8541c	233	atomic_dec(&pWb35Rx->RxFireCounter);
66101de1 PM	234	pWb35Rx->EP3vm_state = VM_STOP;
	235	}
	236
c139a814 PE	237	// This function cannot reentrain
c139a814 PE	238	static void Wb35Rx(struct ieee80211_hw *hw)
66101de1	239	{
c139a814 PE	240	struct wbsoft_priv *priv = hw->priv;
	241	phw_data_t pHwData = &priv->sHwData;
	242	PWB35RX pWb35Rx = &pHwData->Wb35Rx;
	243	u8 * pRxBufferAddress;
	244	struct urb *urb = pWb35Rx->RxUrb;
	245	int retv;
	246	u32 RxBufferId;
66101de1	247
c139a814 PE	248	//
	249	// Issuing URB
	250	//
	251	if (pHwData->SurpriseRemove \|\| pHwData->HwStop)
	252	goto error;
66101de1	253
c139a814 PE	254	if (pWb35Rx->rx_halt)
c139a814 PE	255	goto error;
66101de1	256
c139a814 PE	257	// Get RxBuffer's ID
	258	RxBufferId = pWb35Rx->RxBufferId;
	259	if (!pWb35Rx->RxOwner[RxBufferId]) {
	260	// It's impossible to run here.
66101de1	261	#ifdef _PE_RX_DUMP_
0c59dbaa	262	printk("Rx driver fifo unavailable\n");
66101de1	263	#endif
c139a814 PE	264	goto error;
	265	}
	266
	267	// Update buffer point, then start to bulkin the data from USB
	268	pWb35Rx->RxBufferId++;
	269	pWb35Rx->RxBufferId %= MAX_USB_RX_BUFFER_NUMBER;
	270
	271	pWb35Rx->CurrentRxBufferId = RxBufferId;
	272
	273	pWb35Rx->pDRx = kzalloc(MAX_USB_RX_BUFFER, GFP_ATOMIC);
	274	if (!pWb35Rx->pDRx) {
	275	printk("w35und: Rx memory alloc failed\n");
	276	goto error;
	277	}
	278	pRxBufferAddress = pWb35Rx->pDRx;
	279
	280	usb_fill_bulk_urb(urb, pHwData->WbUsb.udev,
	281	usb_rcvbulkpipe(pHwData->WbUsb.udev, 3),
	282	pRxBufferAddress, MAX_USB_RX_BUFFER,
	283	Wb35Rx_Complete, hw);
	284
	285	pWb35Rx->EP3vm_state = VM_RUNNING;
	286
	287	retv = usb_submit_urb(urb, GFP_ATOMIC);
	288
	289	if (retv != 0) {
	290	printk("Rx URB sending error\n");
	291	goto error;
66101de1	292	}
c139a814 PE	293	return;
	294
	295	error:
	296	// VM stop
	297	pWb35Rx->EP3vm_state = VM_STOP;
	298	atomic_dec(&pWb35Rx->RxFireCounter);
66101de1 PM	299	}
66101de1 PM	300
c139a814	301	void Wb35Rx_start(struct ieee80211_hw *hw)
66101de1	302	{
c139a814 PE	303	struct wbsoft_priv *priv = hw->priv;
c139a814 PE	304	phw_data_t pHwData = &priv->sHwData;
66101de1 PM	305	PWB35RX pWb35Rx = &pHwData->Wb35Rx;
66101de1 PM	306
c139a814 PE	307	// Allow only one thread to run into the Wb35Rx() function
	308	if (atomic_inc_return(&pWb35Rx->RxFireCounter) == 1) {
	309	pWb35Rx->EP3vm_state = VM_RUNNING;
	310	Wb35Rx(hw);
	311	} else
	312	atomic_dec(&pWb35Rx->RxFireCounter);
66101de1 PM	313	}
66101de1 PM	314
c139a814 PE	315	//=====================================================================================
c139a814 PE	316	static void Wb35Rx_reset_descriptor( phw_data_t pHwData )
66101de1 PM	317	{
	318	PWB35RX pWb35Rx = &pHwData->Wb35Rx;
	319	u32 i;
	320
	321	pWb35Rx->ByteReceived = 0;
	322	pWb35Rx->RxProcessIndex = 0;
	323	pWb35Rx->RxBufferId = 0;
	324	pWb35Rx->EP3vm_state = VM_STOP;
	325	pWb35Rx->rx_halt = 0;
	326
	327	// Initial the Queue. The last buffer is reserved for used if the Rx resource is unavailable.
	328	for( i=0; i<MAX_USB_RX_BUFFER_NUMBER; i++ )
	329	pWb35Rx->RxOwner[i] = 1;
	330	}
	331
c139a814	332	unsigned char Wb35Rx_initial(phw_data_t pHwData)
66101de1	333	{
c139a814	334	PWB35RX pWb35Rx = &pHwData->Wb35Rx;
66101de1	335
c139a814 PE	336	// Initial the Buffer Queue
c139a814 PE	337	Wb35Rx_reset_descriptor( pHwData );
66101de1	338
c139a814 PE	339	pWb35Rx->RxUrb = usb_alloc_urb(0, GFP_ATOMIC);
c139a814 PE	340	return (!!pWb35Rx->RxUrb);
66101de1 PM	341	}
66101de1 PM	342
c139a814	343	void Wb35Rx_stop(phw_data_t pHwData)
3cae503b	344	{
c139a814	345	PWB35RX pWb35Rx = &pHwData->Wb35Rx;
3cae503b	346
c139a814 PE	347	// Canceling the Irp if already sends it out.
	348	if (pWb35Rx->EP3vm_state == VM_RUNNING) {
	349	usb_unlink_urb( pWb35Rx->RxUrb ); // Only use unlink, let Wb35Rx_destroy to free them
	350	#ifdef _PE_RX_DUMP_
0c59dbaa	351	printk("EP3 Rx stop\n");
c139a814	352	#endif
3cae503b	353	}
3cae503b	354	}
66101de1	355
c139a814 PE	356	// Needs process context
c139a814 PE	357	void Wb35Rx_destroy(phw_data_t pHwData)
66101de1	358	{
c139a814	359	PWB35RX pWb35Rx = &pHwData->Wb35Rx;
66101de1	360
66101de1	361	do {
c139a814 PE	362	msleep(10); // Delay for waiting function enter 940623.1.a
	363	} while (pWb35Rx->EP3vm_state != VM_STOP);
	364	msleep(10); // Delay for waiting function exit 940623.1.b
66101de1	365
c139a814 PE	366	if (pWb35Rx->RxUrb)
	367	usb_free_urb( pWb35Rx->RxUrb );
	368	#ifdef _PE_RX_DUMP_
0c59dbaa	369	printk("Wb35Rx_destroy OK\n");
c139a814	370	#endif
66101de1 PM	371	}
66101de1 PM	372