drivers/staging/bcm/InterfaceTx.c

   1 #include "headers.h"
   2
   3 #ifndef BCM_SHM_INTERFACE
   4
   5 /*
   6 Function:                               InterfaceTxDataPacket
   7
   8 Description:                    This is the hardware specific Function for Transmitting
   9                                                 data packet to the device.
  10
  11 Input parameters:               IN PMINI_ADAPTER Adapter   - Miniport Adapter Context
  12                                                 PVOID Packet                            -  Packet Containing the data to be transmitted
  13                                                 USHORT usVcid                      - VCID on which data packet is to be sent
  14
  15
  16 Return:                         BCM_STATUS_SUCCESS - If Tx was successful.
  17                                                 Other           - If an error occured.
  18 */
  19
  20 ULONG InterfaceTxDataPacket(PMINI_ADAPTER Adapter,PVOID Packet,USHORT usVcid)
  21 {
  22         ULONG   Status = 0;
  23         return Status;
  24 }
  25
  26 /*
  27 Function:                               InterfaceTxControlPacket
  28
  29 Description:                    This is the hardware specific Function for Transmitting
  30                                                 control packet to the device.
  31
  32 Input parameters:               IN PMINI_ADAPTER Adapter   - Miniport Adapter Context
  33                                                 PVOID pvBuffer                     - Buffer containg control packet
  34                                                 UINT uiBufferLength                - Buffer Length
  35
  36 Return:                         BCM_STATUS_SUCCESS - If control packet transmit was successful.
  37                                                 Other           - If an error occured.
  38 */
  39
  40 ULONG InterfaceTxControlPacket(PMINI_ADAPTER Adapter,PVOID pvBuffer,UINT uiBufferLength)
  41 {
  42         ULONG   Status = 0;
  43
  44
  45
  46         return Status;
  47 }
  48 /*this is transmit call-back(BULK OUT)*/
  49 static void write_bulk_callback(struct urb *urb/*, struct pt_regs *regs*/)
  50 {
  51         PUSB_TCB pTcb= (PUSB_TCB)urb->context;
  52         PS_INTERFACE_ADAPTER psIntfAdapter = pTcb->psIntfAdapter;
  53         CONTROL_MESSAGE *pControlMsg = (CONTROL_MESSAGE *)urb->transfer_buffer;
  54         PMINI_ADAPTER psAdapter = psIntfAdapter->psAdapter ;
  55         BOOLEAN bpowerDownMsg = FALSE ;
  56     PMINI_ADAPTER Adapter = GET_BCM_ADAPTER(gblpnetdev);
  57 #if 0
  58         struct timeval tv;
  59         UINT time_ms = 0;
  60 #endif
  61         if(urb->status != STATUS_SUCCESS)
  62         {
  63                 if(urb->status == -EPIPE)
  64                 {
  65                         psIntfAdapter->psAdapter->bEndPointHalted = TRUE ;
  66                         wake_up(&psIntfAdapter->psAdapter->tx_packet_wait_queue);
  67                 }
  68                 else
  69                 {
  70                         BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL,"Tx URB has got cancelled. status :%d", urb->status);
  71                 }
  72         }
  73
  74         pTcb->bUsed = FALSE;
  75         atomic_dec(&psIntfAdapter->uNumTcbUsed);
  76
  77
  78
  79         if(TRUE == psAdapter->bPreparingForLowPowerMode)
  80         {
  81                 #if 0
  82                 do_gettimeofday(&tv);
  83                 time_ms = tv.tv_sec *1000 + tv.tv_usec/1000;
  84                 BCM_DEBUG_PRINT(Adapter,DBG_TYPE_PRINTK, 0, 0, " %s Idle Mode ACK_Sent got from device at time :0x%x", __FUNCTION__, time_ms);
  85                 #endif
  86
  87                 if(((pControlMsg->szData[0] == GO_TO_IDLE_MODE_PAYLOAD) &&
  88                         (pControlMsg->szData[1] == TARGET_CAN_GO_TO_IDLE_MODE)))
  89
  90                 {
  91                         bpowerDownMsg = TRUE ;
  92                         //This covers the bus err while Idle Request msg sent down.
  93                         if(urb->status != STATUS_SUCCESS)
  94                         {
  95                                 psAdapter->bPreparingForLowPowerMode = FALSE ;
  96                                 BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL,"Idle Mode Request msg failed to reach to Modem");
  97                                 //Signalling the cntrl pkt path in Ioctl
  98                                 wake_up(&psAdapter->lowpower_mode_wait_queue);
  99                                 StartInterruptUrb(psIntfAdapter);
 100                                 goto err_exit;
 101                         }
 102
 103                         if(psAdapter->bDoSuspend == FALSE)
 104                         {
 105                                 psAdapter->IdleMode = TRUE;
 106                                 //since going in Idle mode completed hence making this var false;
 107                                 psAdapter->bPreparingForLowPowerMode = FALSE ;
 108
 109                                 BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL, "Host Entered in Idle Mode State...");
 110                                 //Signalling the cntrl pkt path in Ioctl
 111                                 wake_up(&psAdapter->lowpower_mode_wait_queue);
 112                         }
 113
 114                 }
 115                 else if((pControlMsg->Leader.Status == LINK_UP_CONTROL_REQ) &&
 116                         (pControlMsg->szData[0] == LINK_UP_ACK) &&
 117                         (pControlMsg->szData[1] == LINK_SHUTDOWN_REQ_FROM_FIRMWARE)  &&
 118                         (pControlMsg->szData[2] == SHUTDOWN_ACK_FROM_DRIVER))
 119                 {
 120                         //This covers the bus err while shutdown Request msg sent down.
 121                         if(urb->status != STATUS_SUCCESS)
 122                         {
 123                                 psAdapter->bPreparingForLowPowerMode = FALSE ;
 124                                 BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL,"Shutdown Request Msg failed to reach to Modem");
 125                                 //Signalling the cntrl pkt path in Ioctl
 126                                 wake_up(&psAdapter->lowpower_mode_wait_queue);
 127                                 StartInterruptUrb(psIntfAdapter);
 128                                 goto err_exit;
 129                         }
 130
 131                         bpowerDownMsg = TRUE ;
 132                         if(psAdapter->bDoSuspend == FALSE)
 133                         {
 134                                 psAdapter->bShutStatus = TRUE;
 135                                 //since going in shutdown mode completed hence making this var false;
 136                                 psAdapter->bPreparingForLowPowerMode = FALSE ;
 137                                 BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL,"Host Entered in shutdown Mode State...");
 138                                 //Signalling the cntrl pkt path in Ioctl
 139                                 wake_up(&psAdapter->lowpower_mode_wait_queue);
 140                         }
 141                 }
 142
 143                 if(psAdapter->bDoSuspend && bpowerDownMsg)
 144                 {
 145                         //issuing bus suspend request
 146                         BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL,"Issuing the Bus suspend request to USB stack");
 147                         psIntfAdapter->bPreparingForBusSuspend = TRUE;
 148                         schedule_work(&psIntfAdapter->usbSuspendWork);
 149
 150                 }
 151
 152         }
 153
 154 err_exit :
 155 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 35)
 156         usb_buffer_free(urb->dev, urb->transfer_buffer_length,
 157                         urb->transfer_buffer, urb->transfer_dma);
 158 #else
 159         usb_free_coherent(urb->dev, urb->transfer_buffer_length,
 160                         urb->transfer_buffer, urb->transfer_dma);
 161 #endif
 162 }
 163
 164
 165 static __inline PUSB_TCB GetBulkOutTcb(PS_INTERFACE_ADAPTER psIntfAdapter)
 166 {
 167         PUSB_TCB pTcb = NULL;
 168         UINT index = 0;
 169
 170         if((atomic_read(&psIntfAdapter->uNumTcbUsed) < MAXIMUM_USB_TCB) &&
 171                 (psIntfAdapter->psAdapter->StopAllXaction ==FALSE))
 172         {
 173                 index = atomic_read(&psIntfAdapter->uCurrTcb);
 174                 pTcb = &psIntfAdapter->asUsbTcb[index];
 175                 pTcb->bUsed = TRUE;
 176                 pTcb->psIntfAdapter= psIntfAdapter;
 177                 BCM_DEBUG_PRINT(psIntfAdapter->psAdapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL, "Got Tx desc %d used %d",
 178                         index, atomic_read(&psIntfAdapter->uNumTcbUsed));
 179                 index = (index + 1) % MAXIMUM_USB_TCB;
 180                 atomic_set(&psIntfAdapter->uCurrTcb, index);
 181                 atomic_inc(&psIntfAdapter->uNumTcbUsed);
 182         }
 183         return pTcb;
 184 }
 185
 186 static __inline int TransmitTcb(PS_INTERFACE_ADAPTER psIntfAdapter, PUSB_TCB pTcb, PVOID data, int len)
 187 {
 188
 189         struct urb *urb = pTcb->urb;
 190         int retval = 0;
 191
 192 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 35)
 193         urb->transfer_buffer = usb_buffer_alloc(psIntfAdapter->udev, len,
 194                                                 GFP_ATOMIC, &urb->transfer_dma);
 195 #else
 196         urb->transfer_buffer = usb_alloc_coherent(psIntfAdapter->udev, len,
 197                                                 GFP_ATOMIC, &urb->transfer_dma);
 198 #endif
 199
 200         if (!urb->transfer_buffer)
 201         {
 202                 BCM_DEBUG_PRINT(psIntfAdapter->psAdapter,DBG_TYPE_PRINTK, 0, 0, "Error allocating memory\n");
 203                 return  -ENOMEM;
 204         }
 205         memcpy(urb->transfer_buffer, data, len);
 206         urb->transfer_buffer_length = len;
 207
 208         BCM_DEBUG_PRINT(psIntfAdapter->psAdapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL, "Sending Bulk out packet\n");
 209         //For T3B,INT OUT end point will be used as bulk out end point
 210         if((psIntfAdapter->psAdapter->chip_id == T3B) && (psIntfAdapter->bHighSpeedDevice == TRUE))
 211         {
 212                 usb_fill_int_urb(urb, psIntfAdapter->udev,
 213                 psIntfAdapter->sBulkOut.bulk_out_pipe,
 214                         urb->transfer_buffer, len, write_bulk_callback, pTcb,
 215                         psIntfAdapter->sBulkOut.int_out_interval);
 216         }
 217         else
 218         {
 219         usb_fill_bulk_urb(urb, psIntfAdapter->udev,
 220                   psIntfAdapter->sBulkOut.bulk_out_pipe,
 221                   urb->transfer_buffer, len, write_bulk_callback, pTcb);
 222         }
 223         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; /* For DMA transfer */
 224
 225         if(FALSE == psIntfAdapter->psAdapter->device_removed &&
 226            FALSE == psIntfAdapter->psAdapter->bEndPointHalted &&
 227            FALSE == psIntfAdapter->bSuspended &&
 228            FALSE == psIntfAdapter->bPreparingForBusSuspend)
 229         {
 230                 retval = usb_submit_urb(urb, GFP_ATOMIC);
 231                 if (retval)
 232                 {
 233                         BCM_DEBUG_PRINT(psIntfAdapter->psAdapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL, "failed submitting write urb, error %d", retval);
 234                         if(retval == -EPIPE)
 235                         {
 236                                 psIntfAdapter->psAdapter->bEndPointHalted = TRUE ;
 237                                 wake_up(&psIntfAdapter->psAdapter->tx_packet_wait_queue);
 238                         }
 239                 }
 240         }
 241         return retval;
 242 }
 243
 244 int InterfaceTransmitPacket(PVOID arg, PVOID data, UINT len)
 245 {
 246         PUSB_TCB pTcb= NULL;
 247
 248         PS_INTERFACE_ADAPTER psIntfAdapter = (PS_INTERFACE_ADAPTER)arg;
 249         pTcb= GetBulkOutTcb(psIntfAdapter);
 250         if(pTcb == NULL)
 251         {
 252                 BCM_DEBUG_PRINT(psIntfAdapter->psAdapter,DBG_TYPE_PRINTK, 0, 0, "No URB to transmit packet, dropping packet");
 253                 return -EFAULT;
 254         }
 255         return TransmitTcb(psIntfAdapter, pTcb, data, len);
 256 }
 257
 258 #endif
 259