drivers/staging/winbond/wb35tx.c

   1 //============================================================================
   2 //  Copyright (c) 1996-2002 Winbond Electronic Corporation
   3 //
   4 //  Module Name:
   5 //    Wb35Tx.c
   6 //
   7 //  Abstract:
   8 //    Processing the Tx message and put into down layer
   9 //
  10 //============================================================================
  11 #include <linux/usb.h>
  12 #include <linux/gfp.h>
  13
  14 #include "wb35tx_f.h"
  15 #include "mds_f.h"
  16
  17 unsigned char
  18 Wb35Tx_get_tx_buffer(struct hw_data * pHwData, u8 **pBuffer)
  19 {
  20         struct wb35_tx *pWb35Tx = &pHwData->Wb35Tx;
  21
  22         *pBuffer = pWb35Tx->TxBuffer[0];
  23         return true;
  24 }
  25
  26 static void Wb35Tx(struct wbsoft_priv *adapter);
  27
  28 static void Wb35Tx_complete(struct urb * pUrb)
  29 {
  30         struct wbsoft_priv *adapter = pUrb->context;
  31         struct hw_data *        pHwData = &adapter->sHwData;
  32         struct wb35_tx *pWb35Tx = &pHwData->Wb35Tx;
  33         struct wb35_mds *pMds = &adapter->Mds;
  34
  35         printk("wb35: tx complete\n");
  36         // Variable setting
  37         pWb35Tx->EP4vm_state = VM_COMPLETED;
  38         pWb35Tx->EP4VM_status = pUrb->status; //Store the last result of Irp
  39         pMds->TxOwner[ pWb35Tx->TxSendIndex ] = 0;// Set the owner. Free the owner bit always.
  40         pWb35Tx->TxSendIndex++;
  41         pWb35Tx->TxSendIndex %= MAX_USB_TX_BUFFER_NUMBER;
  42
  43         if (pHwData->SurpriseRemove) // Let WbWlanHalt to handle surprise remove
  44                 goto error;
  45
  46         if (pWb35Tx->tx_halt)
  47                 goto error;
  48
  49         // The URB is completed, check the result
  50         if (pWb35Tx->EP4VM_status != 0) {
  51                 printk("URB submission failed\n");
  52                 pWb35Tx->EP4vm_state = VM_STOP;
  53                 goto error;
  54         }
  55
  56         Mds_Tx(adapter);
  57         Wb35Tx(adapter);
  58         return;
  59
  60 error:
  61         atomic_dec(&pWb35Tx->TxFireCounter);
  62         pWb35Tx->EP4vm_state = VM_STOP;
  63 }
  64
  65 static void Wb35Tx(struct wbsoft_priv *adapter)
  66 {
  67         struct hw_data *        pHwData = &adapter->sHwData;
  68         struct wb35_tx *pWb35Tx = &pHwData->Wb35Tx;
  69         u8              *pTxBufferAddress;
  70         struct wb35_mds *pMds = &adapter->Mds;
  71         struct urb *    pUrb = (struct urb *)pWb35Tx->Tx4Urb;
  72         int             retv;
  73         u32             SendIndex;
  74
  75
  76         if (pHwData->SurpriseRemove)
  77                 goto cleanup;
  78
  79         if (pWb35Tx->tx_halt)
  80                 goto cleanup;
  81
  82         // Ownership checking
  83         SendIndex = pWb35Tx->TxSendIndex;
  84         if (!pMds->TxOwner[SendIndex]) //No more data need to be sent, return immediately
  85                 goto cleanup;
  86
  87         pTxBufferAddress = pWb35Tx->TxBuffer[SendIndex];
  88         //
  89         // Issuing URB
  90         //
  91         usb_fill_bulk_urb(pUrb, pHwData->udev,
  92                           usb_sndbulkpipe(pHwData->udev, 4),
  93                           pTxBufferAddress, pMds->TxBufferSize[ SendIndex ],
  94                           Wb35Tx_complete, adapter);
  95
  96         pWb35Tx->EP4vm_state = VM_RUNNING;
  97         retv = usb_submit_urb(pUrb, GFP_ATOMIC);
  98         if (retv<0) {
  99                 printk("EP4 Tx Irp sending error\n");
 100                 goto cleanup;
 101         }
 102
 103         // Check if driver needs issue Irp for EP2
 104         pWb35Tx->TxFillCount += pMds->TxCountInBuffer[SendIndex];
 105         if (pWb35Tx->TxFillCount > 12)
 106                 Wb35Tx_EP2VM_start(adapter);
 107
 108         pWb35Tx->ByteTransfer += pMds->TxBufferSize[SendIndex];
 109         return;
 110
 111  cleanup:
 112         pWb35Tx->EP4vm_state = VM_STOP;
 113         atomic_dec(&pWb35Tx->TxFireCounter);
 114 }
 115
 116 void Wb35Tx_start(struct wbsoft_priv *adapter)
 117 {
 118         struct hw_data * pHwData = &adapter->sHwData;
 119         struct wb35_tx *pWb35Tx = &pHwData->Wb35Tx;
 120
 121         // Allow only one thread to run into function
 122         if (atomic_inc_return(&pWb35Tx->TxFireCounter) == 1) {
 123                 pWb35Tx->EP4vm_state = VM_RUNNING;
 124                 Wb35Tx(adapter);
 125         } else
 126                 atomic_dec(&pWb35Tx->TxFireCounter);
 127 }
 128
 129 unsigned char Wb35Tx_initial(struct hw_data * pHwData)
 130 {
 131         struct wb35_tx *pWb35Tx = &pHwData->Wb35Tx;
 132
 133         pWb35Tx->Tx4Urb = usb_alloc_urb(0, GFP_ATOMIC);
 134         if (!pWb35Tx->Tx4Urb)
 135                 return false;
 136
 137         pWb35Tx->Tx2Urb = usb_alloc_urb(0, GFP_ATOMIC);
 138         if (!pWb35Tx->Tx2Urb)
 139         {
 140                 usb_free_urb( pWb35Tx->Tx4Urb );
 141                 return false;
 142         }
 143
 144         return true;
 145 }
 146
 147 //======================================================
 148 void Wb35Tx_stop(struct hw_data * pHwData)
 149 {
 150         struct wb35_tx *pWb35Tx = &pHwData->Wb35Tx;
 151
 152         // Trying to canceling the Trp of EP2
 153         if (pWb35Tx->EP2vm_state == VM_RUNNING)
 154                 usb_unlink_urb( pWb35Tx->Tx2Urb ); // Only use unlink, let Wb35Tx_destrot to free them
 155         pr_debug("EP2 Tx stop\n");
 156
 157         // Trying to canceling the Irp of EP4
 158         if (pWb35Tx->EP4vm_state == VM_RUNNING)
 159                 usb_unlink_urb( pWb35Tx->Tx4Urb ); // Only use unlink, let Wb35Tx_destrot to free them
 160         pr_debug("EP4 Tx stop\n");
 161 }
 162
 163 //======================================================
 164 void Wb35Tx_destroy(struct hw_data * pHwData)
 165 {
 166         struct wb35_tx *pWb35Tx = &pHwData->Wb35Tx;
 167
 168         // Wait for VM stop
 169         do {
 170                 msleep(10);  // Delay for waiting function enter 940623.1.a
 171         } while( (pWb35Tx->EP2vm_state != VM_STOP) && (pWb35Tx->EP4vm_state != VM_STOP) );
 172         msleep(10);  // Delay for waiting function enter 940623.1.b
 173
 174         if (pWb35Tx->Tx4Urb)
 175                 usb_free_urb( pWb35Tx->Tx4Urb );
 176
 177         if (pWb35Tx->Tx2Urb)
 178                 usb_free_urb( pWb35Tx->Tx2Urb );
 179
 180         pr_debug("Wb35Tx_destroy OK\n");
 181 }
 182
 183 void Wb35Tx_CurrentTime(struct wbsoft_priv *adapter, u32 TimeCount)
 184 {
 185         struct hw_data * pHwData = &adapter->sHwData;
 186         struct wb35_tx *pWb35Tx = &pHwData->Wb35Tx;
 187         unsigned char Trigger = false;
 188
 189         if (pWb35Tx->TxTimer > TimeCount)
 190                 Trigger = true;
 191         else if (TimeCount > (pWb35Tx->TxTimer+500))
 192                 Trigger = true;
 193
 194         if (Trigger) {
 195                 pWb35Tx->TxTimer = TimeCount;
 196                 Wb35Tx_EP2VM_start(adapter);
 197         }
 198 }
 199
 200 static void Wb35Tx_EP2VM(struct wbsoft_priv *adapter);
 201
 202 static void Wb35Tx_EP2VM_complete(struct urb * pUrb)
 203 {
 204         struct wbsoft_priv *adapter = pUrb->context;
 205         struct hw_data *        pHwData = &adapter->sHwData;
 206         struct T02_descriptor   T02, TSTATUS;
 207         struct wb35_tx *pWb35Tx = &pHwData->Wb35Tx;
 208         u32 *           pltmp = (u32 *)pWb35Tx->EP2_buf;
 209         u32             i;
 210         u16             InterruptInLength;
 211
 212
 213         // Variable setting
 214         pWb35Tx->EP2vm_state = VM_COMPLETED;
 215         pWb35Tx->EP2VM_status = pUrb->status;
 216
 217         // For Linux 2.4. Interrupt will always trigger
 218         if (pHwData->SurpriseRemove) // Let WbWlanHalt to handle surprise remove
 219                 goto error;
 220
 221         if (pWb35Tx->tx_halt)
 222                 goto error;
 223
 224         //The Urb is completed, check the result
 225         if (pWb35Tx->EP2VM_status != 0) {
 226                 printk("EP2 IoCompleteRoutine return error\n");
 227                 pWb35Tx->EP2vm_state= VM_STOP;
 228                 goto error;
 229         }
 230
 231         // Update the Tx result
 232         InterruptInLength = pUrb->actual_length;
 233         // Modify for minimum memory access and DWORD alignment.
 234         T02.value = cpu_to_le32(pltmp[0]) >> 8; // [31:8] -> [24:0]
 235         InterruptInLength -= 1;// 20051221.1.c Modify the follow for more stable
 236         InterruptInLength >>= 2; // InterruptInLength/4
 237         for (i = 1; i <= InterruptInLength; i++) {
 238                 T02.value |= ((cpu_to_le32(pltmp[i]) & 0xff) << 24);
 239
 240                 TSTATUS.value = T02.value;  //20061009 anson's endian
 241                 Mds_SendComplete( adapter, &TSTATUS );
 242                 T02.value = cpu_to_le32(pltmp[i]) >> 8;
 243         }
 244
 245         return;
 246 error:
 247         atomic_dec(&pWb35Tx->TxResultCount);
 248         pWb35Tx->EP2vm_state = VM_STOP;
 249 }
 250
 251 static void Wb35Tx_EP2VM(struct wbsoft_priv *adapter)
 252 {
 253         struct hw_data *        pHwData = &adapter->sHwData;
 254         struct wb35_tx *pWb35Tx = &pHwData->Wb35Tx;
 255         struct urb *    pUrb = (struct urb *)pWb35Tx->Tx2Urb;
 256         u32 *   pltmp = (u32 *)pWb35Tx->EP2_buf;
 257         int             retv;
 258
 259         if (pHwData->SurpriseRemove)
 260                 goto error;
 261
 262         if (pWb35Tx->tx_halt)
 263                 goto error;
 264
 265         //
 266         // Issuing URB
 267         //
 268         usb_fill_int_urb( pUrb, pHwData->udev, usb_rcvintpipe(pHwData->udev,2),
 269                           pltmp, MAX_INTERRUPT_LENGTH, Wb35Tx_EP2VM_complete, adapter, 32);
 270
 271         pWb35Tx->EP2vm_state = VM_RUNNING;
 272         retv = usb_submit_urb(pUrb, GFP_ATOMIC);
 273
 274         if (retv < 0) {
 275                 pr_debug("EP2 Tx Irp sending error\n");
 276                 goto error;
 277         }
 278
 279         return;
 280 error:
 281         pWb35Tx->EP2vm_state = VM_STOP;
 282         atomic_dec(&pWb35Tx->TxResultCount);
 283 }
 284
 285 void Wb35Tx_EP2VM_start(struct wbsoft_priv *adapter)
 286 {
 287         struct hw_data * pHwData = &adapter->sHwData;
 288         struct wb35_tx *pWb35Tx = &pHwData->Wb35Tx;
 289
 290         // Allow only one thread to run into function
 291         if (atomic_inc_return(&pWb35Tx->TxResultCount) == 1) {
 292                 pWb35Tx->EP2vm_state = VM_RUNNING;
 293                 Wb35Tx_EP2VM(adapter);
 294         } else
 295                 atomic_dec(&pWb35Tx->TxResultCount);
 296 }