staging: Beeceem USB Wimax driver

The Sprint 4G network uses a Wimax dongle with Beecem
chipset. The driver is typical of out of tree drivers, but
maybe useful for people, and the hardware is readily available.

Here is a staging ready version (i.e warts and all)

0. Started with Rel_5.2.7.3P1_USB from Sprint4GDeveloperPack-1.1
1. Consolidated files in staging
2. Remove Dos cr/lf
3. Remove unnecessary ioctl from usbbcm_fops

Applied patches that were in the developer pack, surprising
there were ones for 2.6.35 already.

This is compile tested only, see TODO for what still needs
to be done.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 259 insertions, 0 deletions

diff --git a/drivers/staging/bcm/InterfaceTx.c b/drivers/staging/bcm/InterfaceTx.c
new file mode 100644
index 000000000000..771f7b34d2ec
--- /dev/null
+++ b/drivers/staging/bcm/InterfaceTx.c
@@ -0,0 +1,259 @@
+#include "headers.h"
+
+#ifndef BCM_SHM_INTERFACE
+
+/*
+Function:				InterfaceTxDataPacket
+
+Description:			This is the hardware specific Function for Transmitting
+						data packet to the device.
+
+Input parameters:		IN PMINI_ADAPTER Adapter   - Miniport Adapter Context
+						PVOID Packet				-  Packet Containing the data to be transmitted
+						USHORT usVcid			   - VCID on which data packet is to be sent
+
+
+Return:				BCM_STATUS_SUCCESS - If Tx was successful.
+						Other           - If an error occured.
+*/
+
+ULONG InterfaceTxDataPacket(PMINI_ADAPTER Adapter,PVOID Packet,USHORT usVcid)
+{
+	ULONG	Status = 0;
+	return Status;
+}
+
+/*
+Function:				InterfaceTxControlPacket
+
+Description:			This is the hardware specific Function for Transmitting
+						control packet to the device.
+
+Input parameters:		IN PMINI_ADAPTER Adapter   - Miniport Adapter Context
+						PVOID pvBuffer			   - Buffer containg control packet
+						UINT uiBufferLength		   - Buffer Length
+
+Return:				BCM_STATUS_SUCCESS - If control packet transmit was successful.
+						Other           - If an error occured.
+*/
+
+ULONG InterfaceTxControlPacket(PMINI_ADAPTER Adapter,PVOID pvBuffer,UINT uiBufferLength)
+{
+	ULONG	Status = 0;
+
+
+
+	return Status;
+}
+/*this is transmit call-back(BULK OUT)*/
+static void write_bulk_callback(struct urb *urb/*, struct pt_regs *regs*/)
+{
+	PUSB_TCB pTcb= (PUSB_TCB)urb->context;
+	PS_INTERFACE_ADAPTER psIntfAdapter = pTcb->psIntfAdapter;
+	CONTROL_MESSAGE *pControlMsg = (CONTROL_MESSAGE *)urb->transfer_buffer;
+	PMINI_ADAPTER psAdapter = psIntfAdapter->psAdapter ;
+	BOOLEAN bpowerDownMsg = FALSE ;
+    PMINI_ADAPTER Adapter = GET_BCM_ADAPTER(gblpnetdev);
+#if 0
+	struct timeval tv;
+	UINT time_ms = 0;
+#endif
+	if(urb->status != STATUS_SUCCESS)
+	{
+		if(urb->status == -EPIPE)
+		{
+			psIntfAdapter->psAdapter->bEndPointHalted = TRUE ;
+			wake_up(&psIntfAdapter->psAdapter->tx_packet_wait_queue);
+		}
+		else
+		{
+			BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL,"Tx URB has got cancelled. status :%d", urb->status);
+		}
+	}
+
+	pTcb->bUsed = FALSE;
+	atomic_dec(&psIntfAdapter->uNumTcbUsed);
+
+
+
+	if(TRUE == psAdapter->bPreparingForLowPowerMode)
+	{
+		#if 0
+		do_gettimeofday(&tv);
+		time_ms = tv.tv_sec *1000 + tv.tv_usec/1000;
+		BCM_DEBUG_PRINT(Adapter,DBG_TYPE_PRINTK, 0, 0, " %s Idle Mode ACK_Sent got from device at time :0x%x", __FUNCTION__, time_ms);
+		#endif
+
+		if(((pControlMsg->szData[0] == GO_TO_IDLE_MODE_PAYLOAD) &&
+			(pControlMsg->szData[1] == TARGET_CAN_GO_TO_IDLE_MODE)))
+
+		{
+			bpowerDownMsg = TRUE ;
+			//This covers the bus err while Idle Request msg sent down.
+			if(urb->status != STATUS_SUCCESS)
+			{
+				psAdapter->bPreparingForLowPowerMode = FALSE ;
+				BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL,"Idle Mode Request msg failed to reach to Modem");
+				//Signalling the cntrl pkt path in Ioctl
+				wake_up(&psAdapter->lowpower_mode_wait_queue);
+				StartInterruptUrb(psIntfAdapter);
+				goto err_exit;
+			}
+
+			if(psAdapter->bDoSuspend == FALSE)
+			{
+				psAdapter->IdleMode = TRUE;
+				//since going in Idle mode completed hence making this var false;
+				psAdapter->bPreparingForLowPowerMode = FALSE ;
+
+				BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL, "Host Entered in Idle Mode State...");
+				//Signalling the cntrl pkt path in Ioctl
+				wake_up(&psAdapter->lowpower_mode_wait_queue);
+			}
+
+		}
+		else if((pControlMsg->Leader.Status == LINK_UP_CONTROL_REQ) &&
+			(pControlMsg->szData[0] == LINK_UP_ACK) &&
+			(pControlMsg->szData[1] == LINK_SHUTDOWN_REQ_FROM_FIRMWARE)  &&
+			(pControlMsg->szData[2] == SHUTDOWN_ACK_FROM_DRIVER))
+		{
+			//This covers the bus err while shutdown Request msg sent down.
+			if(urb->status != STATUS_SUCCESS)
+			{
+				psAdapter->bPreparingForLowPowerMode = FALSE ;
+				BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL,"Shutdown Request Msg failed to reach to Modem");
+				//Signalling the cntrl pkt path in Ioctl
+				wake_up(&psAdapter->lowpower_mode_wait_queue);
+				StartInterruptUrb(psIntfAdapter);
+				goto err_exit;
+			}
+
+			bpowerDownMsg = TRUE ;
+			if(psAdapter->bDoSuspend == FALSE)
+			{
+				psAdapter->bShutStatus = TRUE;
+				//since going in shutdown mode completed hence making this var false;
+				psAdapter->bPreparingForLowPowerMode = FALSE ;
+				BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL,"Host Entered in shutdown Mode State...");
+				//Signalling the cntrl pkt path in Ioctl
+				wake_up(&psAdapter->lowpower_mode_wait_queue);
+			}
+		}
+
+		if(psAdapter->bDoSuspend && bpowerDownMsg)
+		{
+			//issuing bus suspend request
+			BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL,"Issuing the Bus suspend request to USB stack");
+			psIntfAdapter->bPreparingForBusSuspend = TRUE;
+			schedule_work(&psIntfAdapter->usbSuspendWork);
+
+		}
+
+	}
+
+err_exit :
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 35)
+ 	usb_buffer_free(urb->dev, urb->transfer_buffer_length,
+ 			urb->transfer_buffer, urb->transfer_dma);
+#else
+	usb_free_coherent(urb->dev, urb->transfer_buffer_length,
+ 			urb->transfer_buffer, urb->transfer_dma);
+#endif
+}
+
+
+static __inline PUSB_TCB GetBulkOutTcb(PS_INTERFACE_ADAPTER psIntfAdapter)
+{
+	PUSB_TCB pTcb = NULL;
+	UINT index = 0;
+
+	if((atomic_read(&psIntfAdapter->uNumTcbUsed) < MAXIMUM_USB_TCB) &&
+		(psIntfAdapter->psAdapter->StopAllXaction ==FALSE))
+	{
+		index = atomic_read(&psIntfAdapter->uCurrTcb);
+		pTcb = &psIntfAdapter->asUsbTcb[index];
+		pTcb->bUsed = TRUE;
+		pTcb->psIntfAdapter= psIntfAdapter;
+		BCM_DEBUG_PRINT(psIntfAdapter->psAdapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL, "Got Tx desc %d used %d",
+			index, atomic_read(&psIntfAdapter->uNumTcbUsed));
+		index = (index + 1) % MAXIMUM_USB_TCB;
+		atomic_set(&psIntfAdapter->uCurrTcb, index);
+		atomic_inc(&psIntfAdapter->uNumTcbUsed);
+	}
+	return pTcb;
+}
+
+static __inline int TransmitTcb(PS_INTERFACE_ADAPTER psIntfAdapter, PUSB_TCB pTcb, PVOID data, int len)
+{
+
+	struct urb *urb = pTcb->urb;
+	int retval = 0;
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 35)
+ 	urb->transfer_buffer = usb_buffer_alloc(psIntfAdapter->udev, len,
+ 						GFP_ATOMIC, &urb->transfer_dma);
+#else
+	urb->transfer_buffer = usb_alloc_coherent(psIntfAdapter->udev, len,
+ 						GFP_ATOMIC, &urb->transfer_dma);
+#endif
+
+	if (!urb->transfer_buffer)
+	{
+		BCM_DEBUG_PRINT(psIntfAdapter->psAdapter,DBG_TYPE_PRINTK, 0, 0, "Error allocating memory\n");
+		return  -ENOMEM;
+	}
+	memcpy(urb->transfer_buffer, data, len);
+	urb->transfer_buffer_length = len;
+
+	BCM_DEBUG_PRINT(psIntfAdapter->psAdapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL, "Sending Bulk out packet\n");
+	//For T3B,INT OUT end point will be used as bulk out end point
+	if((psIntfAdapter->psAdapter->chip_id == T3B) && (psIntfAdapter->bHighSpeedDevice == TRUE))
+	{
+		usb_fill_int_urb(urb, psIntfAdapter->udev,
+	    	psIntfAdapter->sBulkOut.bulk_out_pipe,
+			urb->transfer_buffer, len, write_bulk_callback, pTcb,
+			psIntfAdapter->sBulkOut.int_out_interval);
+	}
+	else
+	{
+	usb_fill_bulk_urb(urb, psIntfAdapter->udev,
+		  psIntfAdapter->sBulkOut.bulk_out_pipe,
+		  urb->transfer_buffer, len, write_bulk_callback, pTcb);
+	}
+	urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; /* For DMA transfer */
+
+	if(FALSE == psIntfAdapter->psAdapter->device_removed &&
+	   FALSE == psIntfAdapter->psAdapter->bEndPointHalted &&
+	   FALSE == psIntfAdapter->bSuspended &&
+	   FALSE == psIntfAdapter->bPreparingForBusSuspend)
+	{
+		retval = usb_submit_urb(urb, GFP_ATOMIC);
+		if (retval)
+		{
+			BCM_DEBUG_PRINT(psIntfAdapter->psAdapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL, "failed submitting write urb, error %d", retval);
+			if(retval == -EPIPE)
+			{
+				psIntfAdapter->psAdapter->bEndPointHalted = TRUE ;
+				wake_up(&psIntfAdapter->psAdapter->tx_packet_wait_queue);
+			}
+		}
+	}
+	return retval;
+}
+
+int InterfaceTransmitPacket(PVOID arg, PVOID data, UINT len)
+{
+	PUSB_TCB pTcb= NULL;
+
+	PS_INTERFACE_ADAPTER psIntfAdapter = (PS_INTERFACE_ADAPTER)arg;
+	pTcb= GetBulkOutTcb(psIntfAdapter);
+	if(pTcb == NULL)
+	{
+		BCM_DEBUG_PRINT(psIntfAdapter->psAdapter,DBG_TYPE_PRINTK, 0, 0, "No URB to transmit packet, dropping packet");
+		return -EFAULT;
+	}
+	return TransmitTcb(psIntfAdapter, pTcb, data, len);
+}
+
+#endif
+