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
  13 #include "wb35tx_f.h"
  14 #include "mds_f.h"
  15 #include "sysdef.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         PMDS            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 || pHwData->HwStop) // 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         PMDS            pMds = &adapter->Mds;
  71         struct urb *    pUrb = (struct urb *)pWb35Tx->Tx4Urb;
  72         int             retv;
  73         u32             SendIndex;
  74
  75
  76         if (pHwData->SurpriseRemove || pHwData->HwStop)
  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->WbUsb.udev,
  92                           usb_sndbulkpipe(pHwData->WbUsb.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         #ifdef _PE_TX_DUMP_
 156         printk("EP2 Tx stop\n");
 157         #endif
 158
 159         // Trying to canceling the Irp of EP4
 160         if (pWb35Tx->EP4vm_state == VM_RUNNING)
 161                 usb_unlink_urb( pWb35Tx->Tx4Urb ); // Only use unlink, let Wb35Tx_destrot to free them
 162         #ifdef _PE_TX_DUMP_
 163         printk("EP4 Tx stop\n");
 164         #endif
 165 }
 166
 167 //======================================================
 168 void Wb35Tx_destroy(struct hw_data * pHwData)
 169 {
 170         struct wb35_tx *pWb35Tx = &pHwData->Wb35Tx;
 171
 172         // Wait for VM stop
 173         do {
 174                 msleep(10);  // Delay for waiting function enter 940623.1.a
 175         } while( (pWb35Tx->EP2vm_state != VM_STOP) && (pWb35Tx->EP4vm_state != VM_STOP) );
 176         msleep(10);  // Delay for waiting function enter 940623.1.b
 177
 178         if (pWb35Tx->Tx4Urb)
 179                 usb_free_urb( pWb35Tx->Tx4Urb );
 180
 181         if (pWb35Tx->Tx2Urb)
 182                 usb_free_urb( pWb35Tx->Tx2Urb );
 183
 184         #ifdef _PE_TX_DUMP_
 185         printk("Wb35Tx_destroy OK\n");
 186         #endif
 187 }
 188
 189 void Wb35Tx_CurrentTime(struct wbsoft_priv *adapter, u32 TimeCount)
 190 {
 191         struct hw_data * pHwData = &adapter->sHwData;
 192         struct wb35_tx *pWb35Tx = &pHwData->Wb35Tx;
 193         unsigned char Trigger = false;
 194
 195         if (pWb35Tx->TxTimer > TimeCount)
 196                 Trigger = true;
 197         else if (TimeCount > (pWb35Tx->TxTimer+500))
 198                 Trigger = true;
 199
 200         if (Trigger) {
 201                 pWb35Tx->TxTimer = TimeCount;
 202                 Wb35Tx_EP2VM_start(adapter);
 203         }
 204 }
 205
 206 static void Wb35Tx_EP2VM(struct wbsoft_priv *adapter);
 207
 208 static void Wb35Tx_EP2VM_complete(struct urb * pUrb)
 209 {
 210         struct wbsoft_priv *adapter = pUrb->context;
 211         struct hw_data *        pHwData = &adapter->sHwData;
 212         T02_DESCRIPTOR  T02, TSTATUS;
 213         struct wb35_tx *pWb35Tx = &pHwData->Wb35Tx;
 214         u32 *           pltmp = (u32 *)pWb35Tx->EP2_buf;
 215         u32             i;
 216         u16             InterruptInLength;
 217
 218
 219         // Variable setting
 220         pWb35Tx->EP2vm_state = VM_COMPLETED;
 221         pWb35Tx->EP2VM_status = pUrb->status;
 222
 223         // For Linux 2.4. Interrupt will always trigger
 224         if (pHwData->SurpriseRemove || pHwData->HwStop) // Let WbWlanHalt to handle surprise remove
 225                 goto error;
 226
 227         if (pWb35Tx->tx_halt)
 228                 goto error;
 229
 230         //The Urb is completed, check the result
 231         if (pWb35Tx->EP2VM_status != 0) {
 232                 printk("EP2 IoCompleteRoutine return error\n");
 233                 pWb35Tx->EP2vm_state= VM_STOP;
 234                 goto error;
 235         }
 236
 237         // Update the Tx result
 238         InterruptInLength = pUrb->actual_length;
 239         // Modify for minimum memory access and DWORD alignment.
 240         T02.value = cpu_to_le32(pltmp[0]) >> 8; // [31:8] -> [24:0]
 241         InterruptInLength -= 1;// 20051221.1.c Modify the follow for more stable
 242         InterruptInLength >>= 2; // InterruptInLength/4
 243         for (i = 1; i <= InterruptInLength; i++) {
 244                 T02.value |= ((cpu_to_le32(pltmp[i]) & 0xff) << 24);
 245
 246                 TSTATUS.value = T02.value;  //20061009 anson's endian
 247                 Mds_SendComplete( adapter, &TSTATUS );
 248                 T02.value = cpu_to_le32(pltmp[i]) >> 8;
 249         }
 250
 251         return;
 252 error:
 253         atomic_dec(&pWb35Tx->TxResultCount);
 254         pWb35Tx->EP2vm_state = VM_STOP;
 255 }
 256
 257 static void Wb35Tx_EP2VM(struct wbsoft_priv *adapter)
 258 {
 259         struct hw_data *        pHwData = &adapter->sHwData;
 260         struct wb35_tx *pWb35Tx = &pHwData->Wb35Tx;
 261         struct urb *    pUrb = (struct urb *)pWb35Tx->Tx2Urb;
 262         u32 *   pltmp = (u32 *)pWb35Tx->EP2_buf;
 263         int             retv;
 264
 265         if (pHwData->SurpriseRemove || pHwData->HwStop)
 266                 goto error;
 267
 268         if (pWb35Tx->tx_halt)
 269                 goto error;
 270
 271         //
 272         // Issuing URB
 273         //
 274         usb_fill_int_urb( pUrb, pHwData->WbUsb.udev, usb_rcvintpipe(pHwData->WbUsb.udev,2),
 275                           pltmp, MAX_INTERRUPT_LENGTH, Wb35Tx_EP2VM_complete, adapter, 32);
 276
 277         pWb35Tx->EP2vm_state = VM_RUNNING;
 278         retv = usb_submit_urb(pUrb, GFP_ATOMIC);
 279
 280         if (retv < 0) {
 281                 #ifdef _PE_TX_DUMP_
 282                 printk("EP2 Tx Irp sending error\n");
 283                 #endif
 284                 goto error;
 285         }
 286
 287         return;
 288 error:
 289         pWb35Tx->EP2vm_state = VM_STOP;
 290         atomic_dec(&pWb35Tx->TxResultCount);
 291 }
 292
 293 void Wb35Tx_EP2VM_start(struct wbsoft_priv *adapter)
 294 {
 295         struct hw_data * pHwData = &adapter->sHwData;
 296         struct wb35_tx *pWb35Tx = &pHwData->Wb35Tx;
 297
 298         // Allow only one thread to run into function
 299         if (atomic_inc_return(&pWb35Tx->TxResultCount) == 1) {
 300                 pWb35Tx->EP2vm_state = VM_RUNNING;
 301                 Wb35Tx_EP2VM(adapter);
 302         }
 303         else
 304                 atomic_dec(&pWb35Tx->TxResultCount);
 305 }