drivers/staging/bcm/InterfaceTx.c

   1 #include "headers.h"
   2
   3 /*this is transmit call-back(BULK OUT)*/
   4 static void write_bulk_callback(struct urb *urb/*, struct pt_regs *regs*/)
   5 {
   6         struct bcm_usb_tcb *pTcb = (struct bcm_usb_tcb *)urb->context;
   7         struct bcm_interface_adapter *psIntfAdapter = pTcb->psIntfAdapter;
   8         struct bcm_link_request *pControlMsg = (struct bcm_link_request *)urb->transfer_buffer;
   9         struct bcm_mini_adapter *psAdapter = psIntfAdapter->psAdapter;
  10         bool bpowerDownMsg = false;
  11         struct bcm_mini_adapter *Adapter = GET_BCM_ADAPTER(gblpnetdev);
  12
  13         if (unlikely(netif_msg_tx_done(Adapter)))
  14                 pr_info(PFX "%s: transmit status %d\n", Adapter->dev->name, urb->status);
  15
  16         if (urb->status != STATUS_SUCCESS) {
  17                 if (urb->status == -EPIPE) {
  18                         psIntfAdapter->psAdapter->bEndPointHalted = TRUE;
  19                         wake_up(&psIntfAdapter->psAdapter->tx_packet_wait_queue);
  20                 } else {
  21                         BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL, "Tx URB has got cancelled. status :%d", urb->status);
  22                 }
  23         }
  24
  25         pTcb->bUsed = false;
  26         atomic_dec(&psIntfAdapter->uNumTcbUsed);
  27
  28
  29
  30         if (TRUE == psAdapter->bPreparingForLowPowerMode) {
  31
  32                 if (((pControlMsg->szData[0] == GO_TO_IDLE_MODE_PAYLOAD) &&
  33                         (pControlMsg->szData[1] == TARGET_CAN_GO_TO_IDLE_MODE))) {
  34                         bpowerDownMsg = TRUE;
  35                         /* This covers the bus err while Idle Request msg sent down. */
  36                         if (urb->status != STATUS_SUCCESS) {
  37                                 psAdapter->bPreparingForLowPowerMode = false;
  38                                 BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL, "Idle Mode Request msg failed to reach to Modem");
  39                                 /* Signalling the cntrl pkt path in Ioctl */
  40                                 wake_up(&psAdapter->lowpower_mode_wait_queue);
  41                                 StartInterruptUrb(psIntfAdapter);
  42                                 goto err_exit;
  43                         }
  44
  45                         if (psAdapter->bDoSuspend == false) {
  46                                 psAdapter->IdleMode = TRUE;
  47                                 /* since going in Idle mode completed hence making this var false */
  48                                 psAdapter->bPreparingForLowPowerMode = false;
  49
  50                                 BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL, "Host Entered in Idle Mode State...");
  51                                 /* Signalling the cntrl pkt path in Ioctl*/
  52                                 wake_up(&psAdapter->lowpower_mode_wait_queue);
  53                         }
  54
  55                 } else if ((pControlMsg->Leader.Status == LINK_UP_CONTROL_REQ) &&
  56                         (pControlMsg->szData[0] == LINK_UP_ACK) &&
  57                         (pControlMsg->szData[1] == LINK_SHUTDOWN_REQ_FROM_FIRMWARE)  &&
  58                         (pControlMsg->szData[2] == SHUTDOWN_ACK_FROM_DRIVER)) {
  59                         /* This covers the bus err while shutdown Request msg sent down. */
  60                         if (urb->status != STATUS_SUCCESS) {
  61                                 psAdapter->bPreparingForLowPowerMode = false;
  62                                 BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL, "Shutdown Request Msg failed to reach to Modem");
  63                                 /* Signalling the cntrl pkt path in Ioctl */
  64                                 wake_up(&psAdapter->lowpower_mode_wait_queue);
  65                                 StartInterruptUrb(psIntfAdapter);
  66                                 goto err_exit;
  67                         }
  68
  69                         bpowerDownMsg = TRUE;
  70                         if (psAdapter->bDoSuspend == false) {
  71                                 psAdapter->bShutStatus = TRUE;
  72                                 /* since going in shutdown mode completed hence making this var false */
  73                                 psAdapter->bPreparingForLowPowerMode = false;
  74                                 BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL, "Host Entered in shutdown Mode State...");
  75                                 /* Signalling the cntrl pkt path in Ioctl */
  76                                 wake_up(&psAdapter->lowpower_mode_wait_queue);
  77                         }
  78                 }
  79
  80                 if (psAdapter->bDoSuspend && bpowerDownMsg) {
  81                         /* issuing bus suspend request */
  82                         BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL, "Issuing the Bus suspend request to USB stack");
  83                         psIntfAdapter->bPreparingForBusSuspend = TRUE;
  84                         schedule_work(&psIntfAdapter->usbSuspendWork);
  85
  86                 }
  87
  88         }
  89
  90 err_exit:
  91         usb_free_coherent(urb->dev, urb->transfer_buffer_length,
  92                         urb->transfer_buffer, urb->transfer_dma);
  93 }
  94
  95
  96 static struct bcm_usb_tcb *GetBulkOutTcb(struct bcm_interface_adapter *psIntfAdapter)
  97 {
  98         struct bcm_usb_tcb *pTcb = NULL;
  99         UINT index = 0;
 100
 101         if ((atomic_read(&psIntfAdapter->uNumTcbUsed) < MAXIMUM_USB_TCB) &&
 102                 (psIntfAdapter->psAdapter->StopAllXaction == false)) {
 103                 index = atomic_read(&psIntfAdapter->uCurrTcb);
 104                 pTcb = &psIntfAdapter->asUsbTcb[index];
 105                 pTcb->bUsed = TRUE;
 106                 pTcb->psIntfAdapter = psIntfAdapter;
 107                 BCM_DEBUG_PRINT(psIntfAdapter->psAdapter, DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL, "Got Tx desc %d used %d",
 108                         index, atomic_read(&psIntfAdapter->uNumTcbUsed));
 109                 index = (index + 1) % MAXIMUM_USB_TCB;
 110                 atomic_set(&psIntfAdapter->uCurrTcb, index);
 111                 atomic_inc(&psIntfAdapter->uNumTcbUsed);
 112         }
 113         return pTcb;
 114 }
 115
 116 static int TransmitTcb(struct bcm_interface_adapter *psIntfAdapter, struct bcm_usb_tcb *pTcb, PVOID data, int len)
 117 {
 118
 119         struct urb *urb = pTcb->urb;
 120         int retval = 0;
 121
 122         urb->transfer_buffer = usb_alloc_coherent(psIntfAdapter->udev, len,
 123                                                 GFP_ATOMIC, &urb->transfer_dma);
 124         if (!urb->transfer_buffer) {
 125                 BCM_DEBUG_PRINT(psIntfAdapter->psAdapter, DBG_TYPE_PRINTK, 0, 0, "Error allocating memory\n");
 126                 return  -ENOMEM;
 127         }
 128         memcpy(urb->transfer_buffer, data, len);
 129         urb->transfer_buffer_length = len;
 130
 131         BCM_DEBUG_PRINT(psIntfAdapter->psAdapter, DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL, "Sending Bulk out packet\n");
 132         /* For T3B,INT OUT end point will be used as bulk out end point */
 133         if ((psIntfAdapter->psAdapter->chip_id == T3B) && (psIntfAdapter->bHighSpeedDevice == TRUE)) {
 134                 usb_fill_int_urb(urb, psIntfAdapter->udev,
 135                         psIntfAdapter->sBulkOut.bulk_out_pipe,
 136                         urb->transfer_buffer, len, write_bulk_callback, pTcb,
 137                         psIntfAdapter->sBulkOut.int_out_interval);
 138         } else {
 139         usb_fill_bulk_urb(urb, psIntfAdapter->udev,
 140                   psIntfAdapter->sBulkOut.bulk_out_pipe,
 141                   urb->transfer_buffer, len, write_bulk_callback, pTcb);
 142         }
 143         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; /* For DMA transfer */
 144
 145         if (false == psIntfAdapter->psAdapter->device_removed &&
 146            false == psIntfAdapter->psAdapter->bEndPointHalted &&
 147            false == psIntfAdapter->bSuspended &&
 148            false == psIntfAdapter->bPreparingForBusSuspend) {
 149                 retval = usb_submit_urb(urb, GFP_ATOMIC);
 150                 if (retval) {
 151                         BCM_DEBUG_PRINT(psIntfAdapter->psAdapter, DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL, "failed submitting write urb, error %d", retval);
 152                         if (retval == -EPIPE) {
 153                                 psIntfAdapter->psAdapter->bEndPointHalted = TRUE;
 154                                 wake_up(&psIntfAdapter->psAdapter->tx_packet_wait_queue);
 155                         }
 156                 }
 157         }
 158         return retval;
 159 }
 160
 161 int InterfaceTransmitPacket(PVOID arg, PVOID data, UINT len)
 162 {
 163         struct bcm_usb_tcb *pTcb = NULL;
 164
 165         struct bcm_interface_adapter *psIntfAdapter = arg;
 166         pTcb = GetBulkOutTcb(psIntfAdapter);
 167         if (pTcb == NULL) {
 168                 BCM_DEBUG_PRINT(psIntfAdapter->psAdapter, DBG_TYPE_PRINTK, 0, 0, "No URB to transmit packet, dropping packet");
 169                 return -EFAULT;
 170         }
 171         return TransmitTcb(psIntfAdapter, pTcb, data, len);
 172 }
 173
 174