[deliverable/linux.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;
*/

	memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
	ieee80211_rx_irqsafe(hw, skb);
}

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;
	struct hw_data * pHwData = &priv->sHwData;
	DESCRIPTOR	RxDes;
	struct wb35_rx *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;
	struct hw_data * pHwData = &priv->sHwData;
	struct wb35_rx *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;
	struct hw_data * pHwData = &priv->sHwData;
	struct wb35_rx *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;
	struct hw_data * pHwData = &priv->sHwData;
	struct wb35_rx *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(  struct hw_data * pHwData )
{
	struct wb35_rx *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(struct hw_data * pHwData)
{
	struct wb35_rx *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(struct hw_data * pHwData)
{
	struct wb35_rx *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(struct hw_data * pHwData)
{
	struct wb35_rx *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
f1d58c25 JB	43	memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
f1d58c25 JB	44	ieee80211_rx_irqsafe(hw, skb);
66101de1 PM	45	}
66101de1 PM	46
c139a814 PE	47	static void Wb35Rx_adjust(PDESCRIPTOR pRxDes)
	48	{
	49	u32 * pRxBufferAddress;
	50	u32 DecryptionMethod;
	51	u32 i;
	52	u16 BufferSize;
	53
	54	DecryptionMethod = pRxDes->R01.R01_decryption_method;
	55	pRxBufferAddress = pRxDes->buffer_address[0];
	56	BufferSize = pRxDes->buffer_size[0];
	57
	58	// Adjust the last part of data. Only data left
	59	BufferSize -= 4; // For CRC-32
	60	if (DecryptionMethod)
	61	BufferSize -= 4;
	62	if (DecryptionMethod == 3) // For CCMP
	63	BufferSize -= 4;
	64
	65	// Adjust the IV field which after 802.11 header and ICV field.
	66	if (DecryptionMethod == 1) // For WEP
	67	{
	68	for( i=6; i>0; i-- )
	69	pRxBufferAddress[i] = pRxBufferAddress[i-1];
	70	pRxDes->buffer_address[0] = pRxBufferAddress + 1;
	71	BufferSize -= 4; // 4 byte for IV
	72	}
	73	else if( DecryptionMethod ) // For TKIP and CCMP
	74	{
	75	for (i=7; i>1; i--)
	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
	79	}
	80	pRxDes->buffer_size[0] = BufferSize;
	81	}
	82
	83	static u16 Wb35Rx_indicate(struct ieee80211_hw *hw)
66101de1	84	{
7fff1316	85	struct wbsoft_priv *priv = hw->priv;
8e41b4b6	86	struct hw_data * pHwData = &priv->sHwData;
c139a814	87	DESCRIPTOR RxDes;
eb62f3ea	88	struct wb35_rx *pWb35Rx = &pHwData->Wb35Rx;
c139a814 PE	89	u8 * pRxBufferAddress;
	90	u16 PacketSize;
	91	u16 stmp, BufferSize, stmp2 = 0;
	92	u32 RxBufferId;
66101de1	93
c139a814 PE	94	// Only one thread be allowed to run into the following
	95	do {
	96	RxBufferId = pWb35Rx->RxProcessIndex;
	97	if (pWb35Rx->RxOwner[ RxBufferId ]) //Owner by VM
	98	break;
dc7e04fe	99
c139a814 PE	100	pWb35Rx->RxProcessIndex++;
c139a814 PE	101	pWb35Rx->RxProcessIndex %= MAX_USB_RX_BUFFER_NUMBER;
dc7e04fe	102
c139a814 PE	103	pRxBufferAddress = pWb35Rx->pDRx;
c139a814 PE	104	BufferSize = pWb35Rx->RxBufferSize[ RxBufferId ];
dc7e04fe	105
c139a814 PE	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
	109	break;
dc7e04fe	110
c139a814 PE	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)));
	115	// For new DMA 4k
	116	if ((PacketSize & 0x03) > 0)
	117	PacketSize -= 4;
dc7e04fe	118
c139a814 PE	119	// Basic check for Rx length. Is length valid?
	120	if (PacketSize > MAX_PACKET_SIZE) {
	121	#ifdef _PE_RX_DUMP_
0c59dbaa	122	printk("Serious ERROR : Rx data size too long, size =%d\n", PacketSize);
c139a814	123	#endif
dc7e04fe	124
c139a814 PE	125	pWb35Rx->EP3vm_state = VM_STOP;
	126	pWb35Rx->Ep3ErrorCount2++;
	127	break;
	128	}
dc7e04fe	129
c139a814 PE	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;
dc7e04fe	134
c139a814 PE	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);
dc7e04fe	141
c139a814	142	packet_came(hw, pRxBufferAddress, PacketSize);
dc7e04fe	143
c139a814 PE	144	// Move RxBuffer point to the next
	145	stmp = PacketSize + 3;
	146	stmp &= ~0x03; // 4n alignment
	147	pRxBufferAddress += stmp;
	148	BufferSize -= stmp;
	149	stmp2 += stmp;
	150	}
	151
	152	// Reclaim resource
	153	pWb35Rx->RxOwner[ RxBufferId ] = 1;
	154	} while (true);
	155
	156	return stmp2;
66101de1 PM	157	}
66101de1 PM	158
c139a814 PE	159	static void Wb35Rx(struct ieee80211_hw *hw);
	160
	161	static void Wb35Rx_Complete(struct urb *urb)
66101de1	162	{
7fff1316 PE	163	struct ieee80211_hw *hw = urb->context;
7fff1316 PE	164	struct wbsoft_priv *priv = hw->priv;
8e41b4b6	165	struct hw_data * pHwData = &priv->sHwData;
eb62f3ea	166	struct wb35_rx *pWb35Rx = &pHwData->Wb35Rx;
8b384e0c	167	u8 * pRxBufferAddress;
66101de1 PM	168	u32 SizeCheck;
	169	u16 BulkLength;
	170	u32 RxBufferId;
	171	R00_DESCRIPTOR R00;
	172
	173	// Variable setting
	174	pWb35Rx->EP3vm_state = VM_COMPLETED;
a55a89b1	175	pWb35Rx->EP3VM_status = urb->status;//Store the last result of Irp
66101de1	176
dc7e04fe	177	RxBufferId = pWb35Rx->CurrentRxBufferId;
66101de1	178
dc7e04fe	179	pRxBufferAddress = pWb35Rx->pDRx;
a55a89b1	180	BulkLength = (u16)urb->actual_length;
66101de1	181
dc7e04fe PE	182	// The IRP is completed
dc7e04fe PE	183	pWb35Rx->EP3vm_state = VM_COMPLETED;
66101de1	184
dc7e04fe PE	185	if (pHwData->SurpriseRemove \|\| pHwData->HwStop) // Must be here, or RxBufferId is invalid
	186	goto error;
	187
	188	if (pWb35Rx->rx_halt)
	189	goto error;
	190
	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);
	194
	195	// The URB is completed, check the result
	196	if (pWb35Rx->EP3VM_status != 0) {
	197	#ifdef _PE_USB_STATE_DUMP_
0c59dbaa	198	printk("EP3 IoCompleteRoutine return error\n");
dc7e04fe PE	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
66101de1	215	pWb35Rx->EP3vm_state = VM_STOP;
dc7e04fe	216	pWb35Rx->Ep3ErrorCount2++;
66101de1	217	}
dc7e04fe	218	}
66101de1	219
dc7e04fe PE	220	// Indicating the receiving data
	221	pWb35Rx->ByteReceived += BulkLength;
	222	pWb35Rx->RxBufferSize[ RxBufferId ] = BulkLength;
66101de1	223
dc7e04fe	224	if (!pWb35Rx->RxOwner[ RxBufferId ])
7fff1316	225	Wb35Rx_indicate(hw);
66101de1	226
dc7e04fe PE	227	kfree(pWb35Rx->pDRx);
dc7e04fe PE	228	// Do the next receive
7fff1316	229	Wb35Rx(hw);
dc7e04fe	230	return;
66101de1	231
dc7e04fe	232	error:
66101de1	233	pWb35Rx->RxOwner[ RxBufferId ] = 1; // Set the owner to hardware
44e8541c	234	atomic_dec(&pWb35Rx->RxFireCounter);
66101de1 PM	235	pWb35Rx->EP3vm_state = VM_STOP;
	236	}
	237
c139a814 PE	238	// This function cannot reentrain
c139a814 PE	239	static void Wb35Rx(struct ieee80211_hw *hw)
66101de1	240	{
c139a814	241	struct wbsoft_priv *priv = hw->priv;
8e41b4b6	242	struct hw_data * pHwData = &priv->sHwData;
eb62f3ea	243	struct wb35_rx *pWb35Rx = &pHwData->Wb35Rx;
c139a814 PE	244	u8 * pRxBufferAddress;
	245	struct urb *urb = pWb35Rx->RxUrb;
	246	int retv;
	247	u32 RxBufferId;
66101de1	248
c139a814 PE	249	//
	250	// Issuing URB
	251	//
	252	if (pHwData->SurpriseRemove \|\| pHwData->HwStop)
	253	goto error;
66101de1	254
c139a814 PE	255	if (pWb35Rx->rx_halt)
c139a814 PE	256	goto error;
66101de1	257
c139a814 PE	258	// Get RxBuffer's ID
	259	RxBufferId = pWb35Rx->RxBufferId;
	260	if (!pWb35Rx->RxOwner[RxBufferId]) {
	261	// It's impossible to run here.
66101de1	262	#ifdef _PE_RX_DUMP_
0c59dbaa	263	printk("Rx driver fifo unavailable\n");
66101de1	264	#endif
c139a814 PE	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;
66101de1	293	}
c139a814 PE	294	return;
	295
	296	error:
	297	// VM stop
	298	pWb35Rx->EP3vm_state = VM_STOP;
	299	atomic_dec(&pWb35Rx->RxFireCounter);
66101de1 PM	300	}
66101de1 PM	301
c139a814	302	void Wb35Rx_start(struct ieee80211_hw *hw)
66101de1	303	{
c139a814	304	struct wbsoft_priv *priv = hw->priv;
8e41b4b6	305	struct hw_data * pHwData = &priv->sHwData;
eb62f3ea	306	struct wb35_rx *pWb35Rx = &pHwData->Wb35Rx;
66101de1	307
c139a814 PE	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);
66101de1 PM	314	}
66101de1 PM	315
c139a814	316	//=====================================================================================
8e41b4b6	317	static void Wb35Rx_reset_descriptor( struct hw_data * pHwData )
66101de1	318	{
eb62f3ea	319	struct wb35_rx *pWb35Rx = &pHwData->Wb35Rx;
66101de1 PM	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
8e41b4b6	333	unsigned char Wb35Rx_initial(struct hw_data * pHwData)
66101de1	334	{
eb62f3ea	335	struct wb35_rx *pWb35Rx = &pHwData->Wb35Rx;
66101de1	336
c139a814 PE	337	// Initial the Buffer Queue
c139a814 PE	338	Wb35Rx_reset_descriptor( pHwData );
66101de1	339
c139a814 PE	340	pWb35Rx->RxUrb = usb_alloc_urb(0, GFP_ATOMIC);
c139a814 PE	341	return (!!pWb35Rx->RxUrb);
66101de1 PM	342	}
66101de1 PM	343
8e41b4b6	344	void Wb35Rx_stop(struct hw_data * pHwData)
3cae503b	345	{
eb62f3ea	346	struct wb35_rx *pWb35Rx = &pHwData->Wb35Rx;
3cae503b	347
c139a814 PE	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_
0c59dbaa	352	printk("EP3 Rx stop\n");
c139a814	353	#endif
3cae503b	354	}
3cae503b	355	}
66101de1	356
c139a814	357	// Needs process context
8e41b4b6	358	void Wb35Rx_destroy(struct hw_data * pHwData)
66101de1	359	{
eb62f3ea	360	struct wb35_rx *pWb35Rx = &pHwData->Wb35Rx;
66101de1	361
66101de1	362	do {
c139a814 PE	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
66101de1	366
c139a814 PE	367	if (pWb35Rx->RxUrb)
	368	usb_free_urb( pWb35Rx->RxUrb );
	369	#ifdef _PE_RX_DUMP_
0c59dbaa	370	printk("Wb35Rx_destroy OK\n");
c139a814	371	#endif
66101de1 PM	372	}
66101de1 PM	373