diff options
Diffstat (limited to 'drivers/staging/ced1401/ced_ioc.c')
| -rw-r--r-- | drivers/staging/ced1401/ced_ioc.c | 2055 |
1 files changed, 1036 insertions, 1019 deletions
diff --git a/drivers/staging/ced1401/ced_ioc.c b/drivers/staging/ced1401/ced_ioc.c index 4a13c10..bb29c7f 100644 --- a/drivers/staging/ced1401/ced_ioc.c +++ b/drivers/staging/ced1401/ced_ioc.c @@ -37,17 +37,18 @@ ** ** Empties the Output buffer and sets int lines. Used from user level only ****************************************************************************/ -void FlushOutBuff(DEVICE_EXTENSION *pdx) +void FlushOutBuff(DEVICE_EXTENSION * pdx) { - dev_dbg(&pdx->interface->dev, "%s currentState=%d", __func__, pdx->sCurrentState); - if (pdx->sCurrentState == U14ERR_TIME) /* Do nothing if hardware in trouble */ - return; + dev_dbg(&pdx->interface->dev, "%s currentState=%d", __func__, + pdx->sCurrentState); + if (pdx->sCurrentState == U14ERR_TIME) /* Do nothing if hardware in trouble */ + return; // CharSend_Cancel(pdx); /* Kill off any pending I/O */ - spin_lock_irq(&pdx->charOutLock); - pdx->dwNumOutput = 0; - pdx->dwOutBuffGet = 0; - pdx->dwOutBuffPut = 0; - spin_unlock_irq(&pdx->charOutLock); + spin_lock_irq(&pdx->charOutLock); + pdx->dwNumOutput = 0; + pdx->dwOutBuffGet = 0; + pdx->dwOutBuffPut = 0; + spin_unlock_irq(&pdx->charOutLock); } /**************************************************************************** @@ -56,17 +57,18 @@ void FlushOutBuff(DEVICE_EXTENSION *pdx) ** ** Empties the input buffer and sets int lines ****************************************************************************/ -void FlushInBuff(DEVICE_EXTENSION *pdx) +void FlushInBuff(DEVICE_EXTENSION * pdx) { - dev_dbg(&pdx->interface->dev, "%s currentState=%d", __func__, pdx->sCurrentState); - if (pdx->sCurrentState == U14ERR_TIME) /* Do nothing if hardware in trouble */ - return; + dev_dbg(&pdx->interface->dev, "%s currentState=%d", __func__, + pdx->sCurrentState); + if (pdx->sCurrentState == U14ERR_TIME) /* Do nothing if hardware in trouble */ + return; // CharRead_Cancel(pDevObject); /* Kill off any pending I/O */ - spin_lock_irq(&pdx->charInLock); - pdx->dwNumInput = 0; - pdx->dwInBuffGet = 0; - pdx->dwInBuffPut = 0; - spin_unlock_irq(&pdx->charInLock); + spin_lock_irq(&pdx->charInLock); + pdx->dwNumInput = 0; + pdx->dwInBuffGet = 0; + pdx->dwInBuffPut = 0; + spin_unlock_irq(&pdx->charInLock); } /**************************************************************************** @@ -75,29 +77,26 @@ void FlushInBuff(DEVICE_EXTENSION *pdx) ** Utility routine to copy chars into the output buffer and fire them off. ** called from user mode, holds charOutLock. ****************************************************************************/ -static int PutChars(DEVICE_EXTENSION* pdx, const char* pCh, unsigned int uCount) +static int PutChars(DEVICE_EXTENSION * pdx, const char *pCh, + unsigned int uCount) { - int iReturn; - spin_lock_irq(&pdx->charOutLock); // get the output spin lock - if ((OUTBUF_SZ - pdx->dwNumOutput) >= uCount) - { - unsigned int u; - for (u=0; u<uCount; u++) - { - pdx->outputBuffer[pdx->dwOutBuffPut++] = pCh[u]; - if (pdx->dwOutBuffPut >= OUTBUF_SZ) - pdx->dwOutBuffPut = 0; - } - pdx->dwNumOutput += uCount; - spin_unlock_irq(&pdx->charOutLock); - iReturn = SendChars(pdx); // ...give a chance to transmit data - } - else - { - iReturn = U14ERR_NOOUT; // no room at the out (ha-ha) - spin_unlock_irq(&pdx->charOutLock); - } - return iReturn; + int iReturn; + spin_lock_irq(&pdx->charOutLock); // get the output spin lock + if ((OUTBUF_SZ - pdx->dwNumOutput) >= uCount) { + unsigned int u; + for (u = 0; u < uCount; u++) { + pdx->outputBuffer[pdx->dwOutBuffPut++] = pCh[u]; + if (pdx->dwOutBuffPut >= OUTBUF_SZ) + pdx->dwOutBuffPut = 0; + } + pdx->dwNumOutput += uCount; + spin_unlock_irq(&pdx->charOutLock); + iReturn = SendChars(pdx); // ...give a chance to transmit data + } else { + iReturn = U14ERR_NOOUT; // no room at the out (ha-ha) + spin_unlock_irq(&pdx->charOutLock); + } + return iReturn; } /***************************************************************************** @@ -105,27 +104,29 @@ static int PutChars(DEVICE_EXTENSION* pdx, const char* pCh, unsigned int uCount) ** trigger an output transfer if this is appropriate. User mode. ** Holds the io_mutex *****************************************************************************/ -int SendString(DEVICE_EXTENSION* pdx, const char __user* pData, unsigned int n) +int SendString(DEVICE_EXTENSION * pdx, const char __user * pData, + unsigned int n) { - int iReturn = U14ERR_NOERROR; // assume all will be well - char buffer[OUTBUF_SZ+1]; // space in our address space for characters - if (n > OUTBUF_SZ) // check space in local buffer... - return U14ERR_NOOUT; // ...too many characters - if (copy_from_user(buffer, pData, n)) - return -ENOMEM; // could not copy - buffer[n] = 0; // terminate for debug purposes - - mutex_lock(&pdx->io_mutex); // Protect disconnect from new i/o - if (n > 0) // do nothing if nowt to do! - { - dev_dbg(&pdx->interface->dev, "%s n=%d>%s<", __func__, n, buffer); - iReturn = PutChars(pdx, buffer, n); - } - - Allowi(pdx, false); // make sure we have input int - mutex_unlock(&pdx->io_mutex); - - return iReturn; + int iReturn = U14ERR_NOERROR; // assume all will be well + char buffer[OUTBUF_SZ + 1]; // space in our address space for characters + if (n > OUTBUF_SZ) // check space in local buffer... + return U14ERR_NOOUT; // ...too many characters + if (copy_from_user(buffer, pData, n)) + return -ENOMEM; // could not copy + buffer[n] = 0; // terminate for debug purposes + + mutex_lock(&pdx->io_mutex); // Protect disconnect from new i/o + if (n > 0) // do nothing if nowt to do! + { + dev_dbg(&pdx->interface->dev, "%s n=%d>%s<", __func__, n, + buffer); + iReturn = PutChars(pdx, buffer, n); + } + + Allowi(pdx, false); // make sure we have input int + mutex_unlock(&pdx->io_mutex); + + return iReturn; } /**************************************************************************** @@ -133,15 +134,15 @@ int SendString(DEVICE_EXTENSION* pdx, const char __user* pData, unsigned int n) ** ** Sends a single character to the 1401. User mode, holds io_mutex. ****************************************************************************/ -int SendChar(DEVICE_EXTENSION *pdx, char c) +int SendChar(DEVICE_EXTENSION * pdx, char c) { - int iReturn; - mutex_lock(&pdx->io_mutex); // Protect disconnect from new i/o - iReturn = PutChars(pdx, &c, 1); - dev_dbg(&pdx->interface->dev,"SendChar >%c< (0x%02x)", c, c); - Allowi(pdx, false); // Make sure char reads are running - mutex_unlock(&pdx->io_mutex); - return iReturn; + int iReturn; + mutex_lock(&pdx->io_mutex); // Protect disconnect from new i/o + iReturn = PutChars(pdx, &c, 1); + dev_dbg(&pdx->interface->dev, "SendChar >%c< (0x%02x)", c, c); + Allowi(pdx, false); // Make sure char reads are running + mutex_unlock(&pdx->io_mutex); + return iReturn; } /*************************************************************************** @@ -170,48 +171,47 @@ int SendChar(DEVICE_EXTENSION *pdx, char c) ** ** return error code (U14ERR_NOERROR for OK) */ -int Get1401State(DEVICE_EXTENSION* pdx, __u32* state, __u32* error) +int Get1401State(DEVICE_EXTENSION * pdx, __u32 * state, __u32 * error) { - int nGot; - dev_dbg(&pdx->interface->dev, "Get1401State() entry"); - - *state = 0xFFFFFFFF; // Start off with invalid state - nGot = usb_control_msg(pdx->udev, usb_rcvctrlpipe(pdx->udev, 0), - GET_STATUS, (D_TO_H|VENDOR|DEVREQ), 0,0, - pdx->statBuf, sizeof(pdx->statBuf), HZ); - if (nGot != sizeof(pdx->statBuf)) - { - dev_err(&pdx->interface->dev, "Get1401State() FAILED, return code %d", nGot); - pdx->sCurrentState = U14ERR_TIME; // Indicate that things are very wrong indeed - *state = 0; // Force status values to a known state - *error = 0; - } - else - { - int nDevice; - dev_dbg(&pdx->interface->dev, "Get1401State() Success, state: 0x%x, 0x%x", - pdx->statBuf[0], pdx->statBuf[1]); - - *state = pdx->statBuf[0]; // Return the state values to the calling code - *error = pdx->statBuf[1]; - - nDevice = pdx->udev->descriptor.bcdDevice >> 8; // 1401 type code value - switch (nDevice) // so we can clean up current state - { - case 0: - pdx->sCurrentState = U14ERR_U1401; - break; - - default: // allow lots of device codes for future 1401s - if ((nDevice >= 1) && (nDevice <= 23)) - pdx->sCurrentState = (short)(nDevice + 6); - else - pdx->sCurrentState = U14ERR_ILL; - break; - } - } - - return pdx->sCurrentState >= 0 ? U14ERR_NOERROR : pdx->sCurrentState; + int nGot; + dev_dbg(&pdx->interface->dev, "Get1401State() entry"); + + *state = 0xFFFFFFFF; // Start off with invalid state + nGot = usb_control_msg(pdx->udev, usb_rcvctrlpipe(pdx->udev, 0), + GET_STATUS, (D_TO_H | VENDOR | DEVREQ), 0, 0, + pdx->statBuf, sizeof(pdx->statBuf), HZ); + if (nGot != sizeof(pdx->statBuf)) { + dev_err(&pdx->interface->dev, + "Get1401State() FAILED, return code %d", nGot); + pdx->sCurrentState = U14ERR_TIME; // Indicate that things are very wrong indeed + *state = 0; // Force status values to a known state + *error = 0; + } else { + int nDevice; + dev_dbg(&pdx->interface->dev, + "Get1401State() Success, state: 0x%x, 0x%x", + pdx->statBuf[0], pdx->statBuf[1]); + + *state = pdx->statBuf[0]; // Return the state values to the calling code + *error = pdx->statBuf[1]; + + nDevice = pdx->udev->descriptor.bcdDevice >> 8; // 1401 type code value + switch (nDevice) // so we can clean up current state + { + case 0: + pdx->sCurrentState = U14ERR_U1401; + break; + + default: // allow lots of device codes for future 1401s + if ((nDevice >= 1) && (nDevice <= 23)) + pdx->sCurrentState = (short)(nDevice + 6); + else + pdx->sCurrentState = U14ERR_ILL; + break; + } + } + + return pdx->sCurrentState >= 0 ? U14ERR_NOERROR : pdx->sCurrentState; } /**************************************************************************** @@ -219,49 +219,53 @@ int Get1401State(DEVICE_EXTENSION* pdx, __u32* state, __u32* error) ** ** Kills off staged read\write request from the USB if one is pending. ****************************************************************************/ -int ReadWrite_Cancel(DEVICE_EXTENSION *pdx) +int ReadWrite_Cancel(DEVICE_EXTENSION * pdx) { - dev_dbg(&pdx->interface->dev, "ReadWrite_Cancel entry %d", pdx->bStagedUrbPending); + dev_dbg(&pdx->interface->dev, "ReadWrite_Cancel entry %d", + pdx->bStagedUrbPending); #ifdef NOT_WRITTEN_YET - int ntStatus = STATUS_SUCCESS; - bool bResult = false; - unsigned int i; - // We can fill this in when we know how we will implement the staged transfer stuff - spin_lock_irq(&pdx->stagedLock); - - if (pdx->bStagedUrbPending) // anything to be cancelled? May need more... - { - dev_info(&pdx->interface-dev, "ReadWrite_Cancel about to cancel Urb"); - - // KeClearEvent(&pdx->StagingDoneEvent); // Clear the staging done flag - USB_ASSERT(pdx->pStagedIrp != NULL); - - // Release the spinlock first otherwise the completion routine may hang - // on the spinlock while this function hands waiting for the event. - spin_unlock_irq(&pdx->stagedLock); - bResult = IoCancelIrp(pdx->pStagedIrp); // Actually do the cancel - if (bResult) - { - LARGE_INTEGER timeout; - timeout.QuadPart = -10000000; // Use a timeout of 1 second - dev_info(&pdx->interface-dev, "ReadWrite_Cancel about to wait till done"); - ntStatus = KeWaitForSingleObject(&pdx->StagingDoneEvent, Executive, - KernelMode, FALSE, &timeout); - } - else - { - dev_info(&pdx->interface-dev, "ReadWrite_Cancel, cancellation failed"); - ntStatus = U14ERR_FAIL; - } - USB_KdPrint(DBGLVL_DEFAULT, ("ReadWrite_Cancel ntStatus = 0x%x decimal %d\n", ntStatus, ntStatus)); - } - else - spin_unlock_irq(&pdx->stagedLock); - - dev_info(&pdx->interface-dev, "ReadWrite_Cancel done"); - return ntStatus; + int ntStatus = STATUS_SUCCESS; + bool bResult = false; + unsigned int i; + // We can fill this in when we know how we will implement the staged transfer stuff + spin_lock_irq(&pdx->stagedLock); + + if (pdx->bStagedUrbPending) // anything to be cancelled? May need more... + { + dev_info(&pdx->interface - dev, + "ReadWrite_Cancel about to cancel Urb"); + + // KeClearEvent(&pdx->StagingDoneEvent); // Clear the staging done flag + USB_ASSERT(pdx->pStagedIrp != NULL); + + // Release the spinlock first otherwise the completion routine may hang + // on the spinlock while this function hands waiting for the event. + spin_unlock_irq(&pdx->stagedLock); + bResult = IoCancelIrp(pdx->pStagedIrp); // Actually do the cancel + if (bResult) { + LARGE_INTEGER timeout; + timeout.QuadPart = -10000000; // Use a timeout of 1 second + dev_info(&pdx->interface - dev, + "ReadWrite_Cancel about to wait till done"); + ntStatus = + KeWaitForSingleObject(&pdx->StagingDoneEvent, + Executive, KernelMode, FALSE, + &timeout); + } else { + dev_info(&pdx->interface - dev, + "ReadWrite_Cancel, cancellation failed"); + ntStatus = U14ERR_FAIL; + } + USB_KdPrint(DBGLVL_DEFAULT, + ("ReadWrite_Cancel ntStatus = 0x%x decimal %d\n", + ntStatus, ntStatus)); + } else + spin_unlock_irq(&pdx->stagedLock); + + dev_info(&pdx->interface - dev, "ReadWrite_Cancel done"); + return ntStatus; #else - return U14ERR_NOERROR; + return U14ERR_NOERROR; #endif } @@ -270,15 +274,15 @@ int ReadWrite_Cancel(DEVICE_EXTENSION *pdx) ** InSelfTest - utility to check in self test. Return 1 for ST, 0 for not or ** a -ve error code if we failed for some reason. ***************************************************************************/ -static int InSelfTest(DEVICE_EXTENSION* pdx, unsigned int* pState) +static int InSelfTest(DEVICE_EXTENSION * pdx, unsigned int *pState) { - unsigned int state, error; - int iReturn = Get1401State(pdx, &state, &error); // see if in self-test - if (iReturn == U14ERR_NOERROR) // if all still OK - iReturn = (state == (unsigned int)-1) || // TX problem or... - ((state & 0xff) == 0x80); // ...self test - *pState = state; // return actual state - return iReturn; + unsigned int state, error; + int iReturn = Get1401State(pdx, &state, &error); // see if in self-test + if (iReturn == U14ERR_NOERROR) // if all still OK + iReturn = (state == (unsigned int)-1) || // TX problem or... + ((state & 0xff) == 0x80); // ...self test + *pState = state; // return actual state + return iReturn; } /*************************************************************************** @@ -299,52 +303,50 @@ static int InSelfTest(DEVICE_EXTENSION* pdx, unsigned int* pState) ** ** Returns TRUE if a 1401 detected and OK, else FALSE ****************************************************************************/ -bool Is1401(DEVICE_EXTENSION* pdx) +bool Is1401(DEVICE_EXTENSION * pdx) { - int iReturn; - dev_dbg(&pdx->interface->dev, "%s", __func__); - - ced_draw_down(pdx); // wait for, then kill outstanding Urbs - FlushInBuff(pdx); // Clear out input buffer & pipe - FlushOutBuff(pdx); // Clear output buffer & pipe - - // The next call returns 0 if OK, but has returned 1 in the past, meaning that - // usb_unlock_device() is needed... now it always is - iReturn = usb_lock_device_for_reset(pdx->udev, pdx->interface); - - // release the io_mutex because if we don't, we will deadlock due to system - // calls back into the driver. - mutex_unlock(&pdx->io_mutex); // locked, so we will not get system calls - if (iReturn >= 0) // if we failed - { - iReturn = usb_reset_device(pdx->udev); // try to do the reset - usb_unlock_device(pdx->udev); // undo the lock - } - - mutex_lock(&pdx->io_mutex); // hold stuff off while we wait - pdx->dwDMAFlag = MODE_CHAR; // Clear DMA mode flag regardless! - if (iReturn == 0) // if all is OK still - { - unsigned int state; - iReturn = InSelfTest(pdx, &state); // see if likely in self test - if (iReturn > 0) // do we need to wait for self-test? - { - unsigned long ulTimeOut = jiffies + 30*HZ; // when to give up - while((iReturn > 0) && time_before(jiffies, ulTimeOut)) - { - schedule(); // let other stuff run - iReturn = InSelfTest(pdx, &state); // see if done yet - } - } - - if (iReturn == 0) // if all is OK... - iReturn = state == 0; // then sucess is that the state is 0 - } - else - iReturn = 0; // we failed - pdx->bForceReset = false; // Clear forced reset flag now - - return iReturn > 0; + int iReturn; + dev_dbg(&pdx->interface->dev, "%s", __func__); + + ced_draw_down(pdx); // wait for, then kill outstanding Urbs + FlushInBuff(pdx); // Clear out input buffer & pipe + FlushOutBuff(pdx); // Clear output buffer & pipe + + // The next call returns 0 if OK, but has returned 1 in the past, meaning that + // usb_unlock_device() is needed... now it always is + iReturn = usb_lock_device_for_reset(pdx->udev, pdx->interface); + + // release the io_mutex because if we don't, we will deadlock due to system + // calls back into the driver. + mutex_unlock(&pdx->io_mutex); // locked, so we will not get system calls + if (iReturn >= 0) // if we failed + { + iReturn = usb_reset_device(pdx->udev); // try to do the reset + usb_unlock_device(pdx->udev); // undo the lock + } + + mutex_lock(&pdx->io_mutex); // hold stuff off while we wait + pdx->dwDMAFlag = MODE_CHAR; // Clear DMA mode flag regardless! + if (iReturn == 0) // if all is OK still + { + unsigned int state; + iReturn = InSelfTest(pdx, &state); // see if likely in self test + if (iReturn > 0) // do we need to wait for self-test? + { + unsigned long ulTimeOut = jiffies + 30 * HZ; // when to give up + while ((iReturn > 0) && time_before(jiffies, ulTimeOut)) { + schedule(); // let other stuff run + iReturn = InSelfTest(pdx, &state); // see if done yet + } + } + + if (iReturn == 0) // if all is OK... + iReturn = state == 0; // then sucess is that the state is 0 + } else + iReturn = 0; // we failed + pdx->bForceReset = false; // Clear forced reset flag now + + return iReturn > 0; } /**************************************************************************** @@ -361,44 +363,48 @@ bool Is1401(DEVICE_EXTENSION* pdx) ** ** The return value is TRUE if a useable 1401 is found, FALSE if not */ -bool QuickCheck(DEVICE_EXTENSION* pdx, bool bTestBuff, bool bCanReset) +bool QuickCheck(DEVICE_EXTENSION * pdx, bool bTestBuff, bool bCanReset) { - bool bRet = false; // assume it will fail and we will reset - bool bShortTest; - - bShortTest = ((pdx->dwDMAFlag == MODE_CHAR) && // no DMA running - (!pdx->bForceReset) && // Not had a real reset forced - (pdx->sCurrentState >= U14ERR_STD)); // No 1401 errors stored - - dev_dbg(&pdx->interface->dev, "%s DMAFlag:%d, state:%d, force:%d, testBuff:%d, short:%d", - __func__, pdx->dwDMAFlag, pdx->sCurrentState, pdx->bForceReset, bTestBuff, bShortTest); - - if ((bTestBuff) && // Buffer check requested, and... - (pdx->dwNumInput || pdx->dwNumOutput)) // ...characters were in the buffer? - { - bShortTest = false; // Then do the full test - dev_dbg(&pdx->interface->dev, "%s will reset as buffers not empty", __func__); - } - - if (bShortTest || !bCanReset) // Still OK to try the short test? - { // Always test if no reset - we want state update - unsigned int state, error; - dev_dbg(&pdx->interface->dev, "%s->Get1401State", __func__); - if (Get1401State(pdx, &state, &error) == U14ERR_NOERROR) // Check on the 1401 state - { - if ((state & 0xFF) == 0) // If call worked, check the status value - bRet = true; // If that was zero, all is OK, no reset needed - } - } - - if (!bRet && bCanReset) // If all not OK, then - { - dev_info(&pdx->interface->dev, "%s->Is1401 %d %d %d %d", - __func__, bShortTest, pdx->sCurrentState, bTestBuff, pdx->bForceReset); - bRet = Is1401(pdx); // do full test - } - - return bRet; + bool bRet = false; // assume it will fail and we will reset + bool bShortTest; + + bShortTest = ((pdx->dwDMAFlag == MODE_CHAR) && // no DMA running + (!pdx->bForceReset) && // Not had a real reset forced + (pdx->sCurrentState >= U14ERR_STD)); // No 1401 errors stored + + dev_dbg(&pdx->interface->dev, + "%s DMAFlag:%d, state:%d, force:%d, testBuff:%d, short:%d", + __func__, pdx->dwDMAFlag, pdx->sCurrentState, pdx->bForceReset, + bTestBuff, bShortTest); + + if ((bTestBuff) && // Buffer check requested, and... + (pdx->dwNumInput || pdx->dwNumOutput)) // ...characters were in the buffer? + { + bShortTest = false; // Then do the full test + dev_dbg(&pdx->interface->dev, + "%s will reset as buffers not empty", __func__); + } + + if (bShortTest || !bCanReset) // Still OK to try the short test? + { // Always test if no reset - we want state update + unsigned int state, error; + dev_dbg(&pdx->interface->dev, "%s->Get1401State", __func__); + if (Get1401State(pdx, &state, &error) == U14ERR_NOERROR) // Check on the 1401 state + { + if ((state & 0xFF) == 0) // If call worked, check the status value + bRet = true; // If that was zero, all is OK, no reset needed + } + } + + if (!bRet && bCanReset) // If all not OK, then + { + dev_info(&pdx->interface->dev, "%s->Is1401 %d %d %d %d", + __func__, bShortTest, pdx->sCurrentState, bTestBuff, + pdx->bForceReset); + bRet = Is1401(pdx); // do full test + } + + return bRet; } /**************************************************************************** @@ -406,13 +412,13 @@ bool QuickCheck(DEVICE_EXTENSION* pdx, bool bTestBuff, bool bCanReset) ** ** Resets the 1401 and empties the i/o buffers *****************************************************************************/ -int Reset1401(DEVICE_EXTENSION *pdx) +int Reset1401(DEVICE_EXTENSION * pdx) { - mutex_lock(&pdx->io_mutex); // Protect disconnect from new i/o - dev_dbg(&pdx->interface->dev,"ABout to call QuickCheck"); - QuickCheck(pdx, true, true); // Check 1401, reset if not OK - mutex_unlock(&pdx->io_mutex); - return U14ERR_NOERROR; + mutex_lock(&pdx->io_mutex); // Protect disconnect from new i/o + dev_dbg(&pdx->interface->dev, "ABout to call QuickCheck"); + QuickCheck(pdx, true, true); // Check 1401, reset if not OK + mutex_unlock(&pdx->io_mutex); + return U14ERR_NOERROR; } /**************************************************************************** @@ -420,32 +426,31 @@ int Reset1401(DEVICE_EXTENSION *pdx) ** ** Gets a single character from the 1401 ****************************************************************************/ -int GetChar(DEVICE_EXTENSION *pdx) +int GetChar(DEVICE_EXTENSION * pdx) { - int iReturn = U14ERR_NOIN; // assume we will get nothing - mutex_lock(&pdx->io_mutex); // Protect disconnect from new i/o - - dev_dbg(&pdx->interface->dev, "GetChar"); - - Allowi(pdx, false); // Make sure char reads are running - SendChars(pdx); // and send any buffered chars - - spin_lock_irq(&pdx->charInLock); - if (pdx->dwNumInput > 0) // worth looking - { - iReturn = pdx->inputBuffer[pdx->dwInBuffGet++]; - if (pdx->dwInBuffGet >= INBUF_SZ) - pdx->dwInBuffGet = 0; - pdx->dwNumInput--; - } - else - iReturn = U14ERR_NOIN; // no input data to read - spin_unlock_irq(&pdx->charInLock); - - Allowi(pdx, false); // Make sure char reads are running - - mutex_unlock(&pdx->io_mutex); // Protect disconnect from new i/o - return iReturn; + int iReturn = U14ERR_NOIN; // assume we will get nothing + mutex_lock(&pdx->io_mutex); // Protect disconnect from new i/o + + dev_dbg(&pdx->interface->dev, "GetChar"); + + Allowi(pdx, false); // Make sure char reads are running + SendChars(pdx); // and send any buffered chars + + spin_lock_irq(&pdx->charInLock); + if (pdx->dwNumInput > 0) // worth looking + { + iReturn = pdx->inputBuffer[pdx->dwInBuffGet++]; + if (pdx->dwInBuffGet >= INBUF_SZ) + pdx->dwInBuffGet = 0; + pdx->dwNumInput--; + } else + iReturn = U14ERR_NOIN; // no input data to read + spin_unlock_irq(&pdx->charInLock); + + Allowi(pdx, false); // Make sure char reads are running + + mutex_unlock(&pdx->io_mutex); // Protect disconnect from new i/o + return iReturn; } /**************************************************************************** @@ -459,78 +464,77 @@ int GetChar(DEVICE_EXTENSION *pdx) ** returns the count of characters (including the terminator, or 0 if none ** or a negative error code. ****************************************************************************/ -int GetString(DEVICE_EXTENSION *pdx, char __user* pUser, int n) +int GetString(DEVICE_EXTENSION * pdx, char __user * pUser, int n) { - int nAvailable; // character in the buffer - int iReturn = U14ERR_NOIN; - if (n <= 0) - return -ENOMEM; - - mutex_lock(&pdx->io_mutex); // Protect disconnect from new i/o - Allowi(pdx, false); // Make sure char reads are running - SendChars(pdx); // and send any buffered chars - - spin_lock_irq(&pdx->charInLock); - nAvailable = pdx->dwNumInput; // characters available now - if (nAvailable > n) // read max of space in pUser... - nAvailable = n; // ...or input characters - - if (nAvailable > 0) // worth looking? - { - char buffer[INBUF_SZ+1]; // space for a linear copy of data - int nGot = 0; - int nCopyToUser; // number to copy to user - char cData; - do - { - cData = pdx->inputBuffer[pdx->dwInBuffGet++]; - if (cData == CR_CHAR) // replace CR with zero - cData = (char)0; - - if (pdx->dwInBuffGet >= INBUF_SZ) - pdx->dwInBuffGet = 0; // wrap buffer pointer - - buffer[nGot++] = cData; // save the output - } - while((nGot < nAvailable) && cData); - - nCopyToUser = nGot; // what to copy... - if (cData) // do we need null - { - buffer[nGot] = (char)0; // make it tidy - if (nGot < n) // if space in user buffer... - ++nCopyToUser; // ...copy the 0 as well. - } - - pdx->dwNumInput -= nGot; - spin_unlock_irq(&pdx->charInLock); - - dev_dbg(&pdx->interface->dev,"GetString read %d characters >%s<", nGot, buffer); - copy_to_user(pUser, buffer, nCopyToUser); - - iReturn = nGot; // report characters read - } - else - spin_unlock_irq(&pdx->charInLock); - - Allowi(pdx, false); // Make sure char reads are running - mutex_unlock(&pdx->io_mutex); // Protect disconnect from new i/o - - return iReturn; + int nAvailable; // character in the buffer + int iReturn = U14ERR_NOIN; + if (n <= 0) + return -ENOMEM; + + mutex_lock(&pdx->io_mutex); // Protect disconnect from new i/o + Allowi(pdx, false); // Make sure char reads are running + SendChars(pdx); // and send any buffered chars + + spin_lock_irq(&pdx->charInLock); + nAvailable = pdx->dwNumInput; // characters available now + if (nAvailable > n) // read max of space in pUser... + nAvailable = n; // ...or input characters + + if (nAvailable > 0) // worth looking? + { + char buffer[INBUF_SZ + 1]; // space for a linear copy of data + int nGot = 0; + int nCopyToUser; // number to copy to user + char cData; + do { + cData = pdx->inputBuffer[pdx->dwInBuffGet++]; + if (cData == CR_CHAR) // replace CR with zero + cData = (char)0; + + if (pdx->dwInBuffGet >= INBUF_SZ) + pdx->dwInBuffGet = 0; // wrap buffer pointer + + buffer[nGot++] = cData; // save the output + } + while ((nGot < nAvailable) && cData); + + nCopyToUser = nGot; // what to copy... + if (cData) // do we need null + { + buffer[nGot] = (char)0; // make it tidy + if (nGot < n) // if space in user buffer... + ++nCopyToUser; // ...copy the 0 as well. + } + + pdx->dwNumInput -= nGot; + spin_unlock_irq(&pdx->charInLock); + + dev_dbg(&pdx->interface->dev, + "GetString read %d characters >%s<", nGot, buffer); + copy_to_user(pUser, buffer, nCopyToUser); + + iReturn = nGot; // report characters read + } else + spin_unlock_irq(&pdx->charInLock); + + Allowi(pdx, false); // Make sure char reads are running + mutex_unlock(&pdx->io_mutex); // Protect disconnect from new i/o + + return iReturn; } /******************************************************************************* ** Get count of characters in the inout buffer. *******************************************************************************/ -int Stat1401(DEVICE_EXTENSION *pdx) +int Stat1401(DEVICE_EXTENSION * pdx) { - int iReturn; - mutex_lock(&pdx->io_mutex); // Protect disconnect from new i/o - Allowi(pdx, false); // make sure we allow pending chars - SendChars(pdx); // in both directions - iReturn = pdx->dwNumInput; // no lock as single read - mutex_unlock(&pdx->io_mutex); // Protect disconnect from new i/o - return iReturn; + int iReturn; + mutex_lock(&pdx->io_mutex); // Protect disconnect from new i/o + Allowi(pdx, false); // make sure we allow pending chars + SendChars(pdx); // in both directions + iReturn = pdx->dwNumInput; // no lock as single read + mutex_unlock(&pdx->io_mutex); // Protect disconnect from new i/o + return iReturn; } /**************************************************************************** @@ -540,34 +544,33 @@ int Stat1401(DEVICE_EXTENSION *pdx) ** any fancy interlocks as we only read the interrupt routine data, and the ** system is arranged so nothing can be destroyed. ****************************************************************************/ -int LineCount(DEVICE_EXTENSION *pdx) +int LineCount(DEVICE_EXTENSION * pdx) { - int iReturn = 0; // will be count of line ends - - mutex_lock(&pdx->io_mutex); // Protect disconnect from new i/o - Allowi(pdx, false); // Make sure char reads are running - SendChars(pdx); // and send any buffered chars - spin_lock_irq(&pdx->charInLock); // Get protection - - if (pdx->dwNumInput > 0) // worth looking? - { - unsigned int dwIndex = pdx->dwInBuffGet;// start at first available - unsigned int dwEnd = pdx->dwInBuffPut; // Position for search end - do - { - if (pdx->inputBuffer[dwIndex++] == CR_CHAR) - ++iReturn; // inc count if CR - - if (dwIndex >= INBUF_SZ) // see if we fall off buff - dwIndex = 0; - } - while (dwIndex != dwEnd); // go to last avaliable - } - - spin_unlock_irq(&pdx->charInLock); - dev_dbg(&pdx->interface->dev,"LineCount returned %d", iReturn); - mutex_unlock(&pdx->io_mutex); // Protect disconnect from new i/o - return iReturn; + int iReturn = 0; // will be count of line ends + + mutex_lock(&pdx->io_mutex); // Protect disconnect from new i/o + Allowi(pdx, false); // Make sure char reads are running + SendChars(pdx); // and send any buffered chars + spin_lock_irq(&pdx->charInLock); // Get protection + + if (pdx->dwNumInput > 0) // worth looking? + { + unsigned int dwIndex = pdx->dwInBuffGet; // start at first available + unsigned int dwEnd = pdx->dwInBuffPut; // Position for search end + do { + if (pdx->inputBuffer[dwIndex++] == CR_CHAR) + ++iReturn; // inc count if CR + + if (dwIndex >= INBUF_SZ) // see if we fall off buff + dwIndex = 0; + } + while (dwIndex != dwEnd); // go to last avaliable + } + + spin_unlock_irq(&pdx->charInLock); + dev_dbg(&pdx->interface->dev, "LineCount returned %d", iReturn); + mutex_unlock(&pdx->io_mutex); // Protect disconnect from new i/o + return iReturn; } /**************************************************************************** @@ -575,15 +578,15 @@ int LineCount(DEVICE_EXTENSION *pdx) ** ** Gets the space in the output buffer. Called from user code. *****************************************************************************/ -int GetOutBufSpace(DEVICE_EXTENSION *pdx) +int GetOutBufSpace(DEVICE_EXTENSION * pdx) { - int iReturn; - mutex_lock(&pdx->io_mutex); // Protect disconnect from new i/o - SendChars(pdx); // send any buffered chars - iReturn = (int)(OUTBUF_SZ - pdx->dwNumOutput); // no lock needed for single read - dev_dbg(&pdx->interface->dev,"OutBufSpace %d", iReturn); - mutex_unlock(&pdx->io_mutex); // Protect disconnect from new i/o - return iReturn; + int iReturn; + mutex_lock(&pdx->io_mutex); // Protect disconnect from new i/o + SendChars(pdx); // send any buffered chars + iReturn = (int)(OUTBUF_SZ - pdx->dwNumOutput); // no lock needed for single read + dev_dbg(&pdx->interface->dev, "OutBufSpace %d", iReturn); + mutex_unlock(&pdx->io_mutex); // Protect disconnect from new i/o + return iReturn; } /**************************************************************************** @@ -593,74 +596,75 @@ int GetOutBufSpace(DEVICE_EXTENSION *pdx) ** Clears up a transfer area. This is always called in the context of a user ** request, never from a call-back. ****************************************************************************/ -int ClearArea(DEVICE_EXTENSION *pdx, int nArea) +int ClearArea(DEVICE_EXTENSION * pdx, int nArea) { - int iReturn = U14ERR_NOERROR; - - if ((nArea < 0) || (nArea >= MAX_TRANSAREAS)) - { - iReturn = U14ERR_BADAREA; - dev_err(&pdx->interface->dev, "%s Attempt to clear area %d", __func__, nArea); - } - else - { - TRANSAREA *pTA = &pdx->rTransDef[nArea]; // to save typing - if (!pTA->bUsed) // if not used... - iReturn = U14ERR_NOTSET; // ...nothing to be done - else - { - // We must save the memory we return as we shouldn't mess with memory while - // holding a spin lock. - struct page **pPages = 0; // save page address list - int nPages = 0; // and number of pages - int np; - - dev_dbg(&pdx->interface->dev, "%s area %d", __func__, nArea); - spin_lock_irq(&pdx->stagedLock); - if ((pdx->StagedId == nArea) && (pdx->dwDMAFlag > MODE_CHAR)) - { - iReturn = U14ERR_UNLOCKFAIL; // cannot delete as in use - dev_err(&pdx->interface->dev, "%s call on area %d while active", __func__, nArea); - } - else - { - pPages = pTA->pPages; // save page address list - nPages = pTA->nPages; // and page count - if (pTA->dwEventSz) // if events flagging in use - wake_up_interruptible(&pTA->wqEvent); // release anything that was waiting - - if (pdx->bXFerWaiting && (pdx->rDMAInfo.wIdent == nArea)) - pdx->bXFerWaiting = false; // Cannot have pending xfer if area cleared - - // Clean out the TRANSAREA except for the wait queue, which is at the end - // This sets bUsed to false and dwEventSz to 0 to say area not used and no events. - memset(pTA, 0, sizeof(TRANSAREA)-sizeof(wait_queue_head_t)); - } - spin_unlock_irq(&pdx->stagedLock); - - if (pPages) // if we decided to release the memory - { - // Now we must undo the pinning down of the pages. We will assume the worst and mark - // all the pages as dirty. Don't be tempted to move this up above as you must not be - // holding a spin lock to do this stuff as it is not atomic. - dev_dbg(&pdx->interface->dev, "%s nPages=%d", __func__, nPages); - - for (np = 0; np < nPages; ++np) - { - if (pPages[np]) - { - SetPageDirty(pPages[np]); - page_cache_release(pPages[np]); - } - } - - kfree(pPages); - dev_dbg(&pdx->interface->dev, "%s kfree(pPages) done", __func__); - } - } - } - - return iReturn; + int iReturn = U14ERR_NOERROR; + + if ((nArea < 0) || (nArea >= MAX_TRANSAREAS)) { + iReturn = U14ERR_BADAREA; + dev_err(&pdx->interface->dev, "%s Attempt to clear area %d", + __func__, nArea); + } else { + TRANSAREA *pTA = &pdx->rTransDef[nArea]; // to save typing + if (!pTA->bUsed) // if not used... + iReturn = U14ERR_NOTSET; // ...nothing to be done + else { + // We must save the memory we return as we shouldn't mess with memory while + // holding a spin lock. + struct page **pPages = 0; // save page address list + int nPages = 0; // and number of pages + int np; + + dev_dbg(&pdx->interface->dev, "%s area %d", __func__, + nArea); + spin_lock_irq(&pdx->stagedLock); + if ((pdx->StagedId == nArea) + && (pdx->dwDMAFlag > MODE_CHAR)) { + iReturn = U14ERR_UNLOCKFAIL; // cannot delete as in use + dev_err(&pdx->interface->dev, + "%s call on area %d while active", + __func__, nArea); + } else { + pPages = pTA->pPages; // save page address list + nPages = pTA->nPages; // and page count + if (pTA->dwEventSz) // if events flagging in use + wake_up_interruptible(&pTA->wqEvent); // release anything that was waiting + + if (pdx->bXFerWaiting + && (pdx->rDMAInfo.wIdent == nArea)) + pdx->bXFerWaiting = false; // Cannot have pending xfer if area cleared + + // Clean out the TRANSAREA except for the wait queue, which is at the end + // This sets bUsed to false and dwEventSz to 0 to say area not used and no events. + memset(pTA, 0, + sizeof(TRANSAREA) - + sizeof(wait_queue_head_t)); + } + spin_unlock_irq(&pdx->stagedLock); + + if (pPages) // if we decided to release the memory + { + // Now we must undo the pinning down of the pages. We will assume the worst and mark + // all the pages as dirty. Don't be tempted to move this up above as you must not be + // holding a spin lock to do this stuff as it is not atomic. + dev_dbg(&pdx->interface->dev, "%s nPages=%d", + __func__, nPages); + + for (np = 0; np < nPages; ++np) { + if (pPages[np]) { + SetPageDirty(pPages[np]); + page_cache_release(pPages[np]); + } + } + + kfree(pPages); + dev_dbg(&pdx->interface->dev, + "%s kfree(pPages) done", __func__); + } + } + } + + return iReturn; } /**************************************************************************** @@ -669,78 +673,78 @@ int ClearArea(DEVICE_EXTENSION *pdx, int nArea) ** Sets up a transfer area - the functional part. Called by both ** SetTransfer and SetCircular. ****************************************************************************/ -static int SetArea(DEVICE_EXTENSION *pdx, int nArea, char __user* puBuf, - unsigned int dwLength, bool bCircular, bool bCircToHost) +static int SetArea(DEVICE_EXTENSION * pdx, int nArea, char __user * puBuf, + unsigned int dwLength, bool bCircular, bool bCircToHost) { - // Start by working out the page aligned start of the area and the size - // of the area in pages, allowing for the start not being aligned and the - // end needing to be rounded up to a page boundary. - unsigned long ulStart = ((unsigned long)puBuf) & PAGE_MASK; - unsigned int ulOffset = ((unsigned long)puBuf) & (PAGE_SIZE-1); - int len = (dwLength + ulOffset+PAGE_SIZE - 1) >> PAGE_SHIFT; - - TRANSAREA *pTA = &pdx->rTransDef[nArea]; // to save typing - struct page **pPages = 0; // space for page tables - int nPages = 0; // and number of pages - - int iReturn = ClearArea(pdx, nArea); // see if OK to use this area - if ((iReturn != U14ERR_NOTSET) && // if not area unused and... - (iReturn != U14ERR_NOERROR)) // ...not all OK, then... - return iReturn; // ...we cannot use this area - - if (!access_ok(VERIFY_WRITE, puBuf, dwLength)) // if we cannot access the memory... - return -EFAULT; // ...then we are done - - // Now allocate space to hold the page pointer and virtual address pointer tables - pPages = (struct page **)kmalloc(len*sizeof(struct page *), GFP_KERNEL); - if (!pPages) - { - iReturn = U14ERR_NOMEMORY; - goto error; - } - dev_dbg(&pdx->interface->dev, "%s %p, length=%06x, circular %d", __func__, puBuf, dwLength, bCircular); - - // To pin down user pages we must first acquire the mapping semaphore. - down_read(¤t->mm->mmap_sem); // get memory map semaphore - nPages = get_user_pages(current, current->mm, ulStart, len, 1, 0, pPages, 0); - up_read(¤t->mm->mmap_sem); // release the semaphore - dev_dbg(&pdx->interface->dev, "%s nPages = %d", __func__, nPages); - - if (nPages > 0) // if we succeeded - { - // If you are tempted to use page_address (form LDD3), forget it. You MUST use - // kmap() or kmap_atomic() to get a virtual address. page_address will give you - // (null) or at least it does in this context with an x86 machine. - spin_lock_irq(&pdx->stagedLock); - pTA->lpvBuff = puBuf; // keep start of region (user address) - pTA->dwBaseOffset = ulOffset; // save offset in first page to start of xfer - pTA->dwLength = dwLength; // Size if the region in bytes - pTA->pPages = pPages; // list of pages that are used by buffer - pTA->nPages = nPages; // number of pages - - pTA->bCircular = bCircular; - pTA->bCircToHost = bCircToHost; - - pTA->aBlocks[0].dwOffset = 0; - pTA->aBlocks[0].dwSize = 0; - pTA->aBlocks[1].dwOffset = 0; - pTA->aBlocks[1].dwSize = 0; - pTA->bUsed = true; // This is now a used block - - spin_unlock_irq(&pdx->stagedLock); - iReturn = U14ERR_NOERROR; // say all was well - } - else - { - iReturn = U14ERR_LOCKFAIL; - goto error; - } - - return iReturn; + // Start by working out the page aligned start of the area and the size + // of the area in pages, allowing for the start not being aligned and the + // end needing to be rounded up to a page boundary. + unsigned long ulStart = ((unsigned long)puBuf) & PAGE_MASK; + unsigned int ulOffset = ((unsigned long)puBuf) & (PAGE_SIZE - 1); + int len = (dwLength + ulOffset + PAGE_SIZE - 1) >> PAGE_SHIFT; + + TRANSAREA *pTA = &pdx->rTransDef[nArea]; // to save typing + struct page **pPages = 0; // space for page tables + int nPages = 0; // and number of pages + + int iReturn = ClearArea(pdx, nArea); // see if OK to use this area + if ((iReturn != U14ERR_NOTSET) && // if not area unused and... + (iReturn != U14ERR_NOERROR)) // ...not all OK, then... + return iReturn; // ...we cannot use this area + + if (!access_ok(VERIFY_WRITE, puBuf, dwLength)) // if we cannot access the memory... + return -EFAULT; // ...then we are done + + // Now allocate space to hold the page pointer and virtual address pointer tables + pPages = + (struct page **)kmalloc(len * sizeof(struct page *), GFP_KERNEL); + if (!pPages) { + iReturn = U14ERR_NOMEMORY; + goto error; + } + dev_dbg(&pdx->interface->dev, "%s %p, length=%06x, circular %d", + __func__, puBuf, dwLength, bCircular); + + // To pin down user pages we must first acquire the mapping semaphore. + down_read(¤t->mm->mmap_sem); // get memory map semaphore + nPages = + get_user_pages(current, current->mm, ulStart, len, 1, 0, pPages, 0); + up_read(¤t->mm->mmap_sem); // release the semaphore + dev_dbg(&pdx->interface->dev, "%s nPages = %d", __func__, nPages); + + if (nPages > 0) // if we succeeded + { + // If you are tempted to use page_address (form LDD3), forget it. You MUST use + // kmap() or kmap_atomic() to get a virtual address. page_address will give you + // (null) or at least it does in this context with an x86 machine. + spin_lock_irq(&pdx->stagedLock); + pTA->lpvBuff = puBuf; // keep start of region (user address) + pTA->dwBaseOffset = ulOffset; // save offset in first page to start of xfer + pTA->dwLength = dwLength; // Size if the region in bytes + pTA->pPages = pPages; // list of pages that are used by buffer + pTA->nPages = nPages; // number of pages + + pTA->bCircular = bCircular; + pTA->bCircToHost = bCircToHost; + + pTA->aBlocks[0].dwOffset = 0; + pTA->aBlocks[0].dwSize = 0; + pTA->aBlocks[1].dwOffset = 0; + pTA->aBlocks[1].dwSize = 0; + pTA->bUsed = true; // This is now a used block + + spin_unlock_irq(&pdx->stagedLock); + iReturn = U14ERR_NOERROR; // say all was well + } else { + iReturn = U14ERR_LOCKFAIL; + goto error; + } + + return iReturn; error: - kfree(pPages); - return iReturn; + kfree(pPages); + return iReturn; } /**************************************************************************** @@ -750,32 +754,36 @@ error: ** unset it. Unsetting will fail if the area is booked, and a transfer to that ** area is in progress. Otherwise, we will release the area and re-assign it. ****************************************************************************/ -int SetTransfer(DEVICE_EXTENSION *pdx, TRANSFERDESC __user *pTD) +int SetTransfer(DEVICE_EXTENSION * pdx, TRANSFERDESC __user * pTD) { - int iReturn; - TRANSFERDESC td; - copy_from_user(&td, pTD, sizeof(td)); - mutex_lock(&pdx->io_mutex); - dev_dbg(&pdx->interface->dev,"%s area:%d, size:%08x", __func__, td.wAreaNum, td.dwLength); - // The strange cast is done so that we don't get warnings in 32-bit linux about the size of the - // pointer. The pointer is always passed as a 64-bit object so that we don't have problems using - // a 32-bit program on a 64-bit system. unsigned long is 64-bits on a 64-bit system. - iReturn = SetArea(pdx, td.wAreaNum, (char __user *)((unsigned long)td.lpvBuff), td.dwLength, false, false); - mutex_unlock(&pdx->io_mutex); - return iReturn; + int iReturn; + TRANSFERDESC td; + copy_from_user(&td, pTD, sizeof(td)); + mutex_lock(&pdx->io_mutex); + dev_dbg(&pdx->interface->dev, "%s area:%d, size:%08x", __func__, + td.wAreaNum, td.dwLength); + // The strange cast is done so that we don't get warnings in 32-bit linux about the size of the + // pointer. The pointer is always passed as a 64-bit object so that we don't have problems using + // a 32-bit program on a 64-bit system. unsigned long is 64-bits on a 64-bit system. + iReturn = + SetArea(pdx, td.wAreaNum, + (char __user *)((unsigned long)td.lpvBuff), td.dwLength, + false, false); + mutex_unlock(&pdx->io_mutex); + return iReturn; } /**************************************************************************** ** UnSetTransfer ** Erases a transfer area record ****************************************************************************/ -int UnsetTransfer(DEVICE_EXTENSION *pdx, int nArea) +int UnsetTransfer(DEVICE_EXTENSION * pdx, int nArea) { - int iReturn; - mutex_lock(&pdx->io_mutex); - iReturn = ClearArea(pdx, nArea); - mutex_unlock(&pdx->io_mutex); - return iReturn; + int iReturn; + mutex_lock(&pdx->io_mutex); + iReturn = ClearArea(pdx, nArea); + mutex_unlock(&pdx->io_mutex); + return iReturn; } /**************************************************************************** @@ -786,31 +794,30 @@ int UnsetTransfer(DEVICE_EXTENSION *pdx, int nArea) ** pretend that whatever the user asked for was achieved, so we return 1 if ** try to create one, and 0 if they ask to remove (assuming all else was OK). ****************************************************************************/ -int SetEvent(DEVICE_EXTENSION *pdx, TRANSFEREVENT __user*pTE) +int SetEvent(DEVICE_EXTENSION * pdx, TRANSFEREVENT __user * pTE) { - int iReturn = U14ERR_NOERROR; - TRANSFEREVENT te; - copy_from_user(&te, pTE, sizeof(te)); // get a local copy of the data - if (te.wAreaNum >= MAX_TRANSAREAS) // the area must exist - return U14ERR_BADAREA; - else - { - TRANSAREA *pTA = &pdx->rTransDef[te.wAreaNum]; - mutex_lock(&pdx->io_mutex); // make sure we have no competitor - spin_lock_irq(&pdx->stagedLock); - if (pTA->bUsed) // area must be in use - { - pTA->dwEventSt = te.dwStart; // set area regions - pTA->dwEventSz = te.dwLength; // set size (0 cancels it) - pTA->bEventToHost = te.wFlags & 1; // set the direction - pTA->iWakeUp = 0; // zero the wake up count - } - else - iReturn = U14ERR_NOTSET; - spin_unlock_irq(&pdx->stagedLock); - mutex_unlock(&pdx->io_mutex); - } - return iReturn == U14ERR_NOERROR ? (te.iSetEvent ? 1 : U14ERR_NOERROR) : iReturn; + int iReturn = U14ERR_NOERROR; + TRANSFEREVENT te; + copy_from_user(&te, pTE, sizeof(te)); // get a local copy of the data + if (te.wAreaNum >= MAX_TRANSAREAS) // the area must exist + return U14ERR_BADAREA; + else { + TRANSAREA *pTA = &pdx->rTransDef[te.wAreaNum]; + mutex_lock(&pdx->io_mutex); // make sure we have no competitor + spin_lock_irq(&pdx->stagedLock); + if (pTA->bUsed) // area must be in use + { + pTA->dwEventSt = te.dwStart; // set area regions + pTA->dwEventSz = te.dwLength; // set size (0 cancels it) + pTA->bEventToHost = te.wFlags & 1; // set the direction + pTA->iWakeUp = 0; // zero the wake up count + } else + iReturn = U14ERR_NOTSET; + spin_unlock_irq(&pdx->stagedLock); + mutex_unlock(&pdx->io_mutex); + } + return iReturn == + U14ERR_NOERROR ? (te.iSetEvent ? 1 : U14ERR_NOERROR) : iReturn; } /**************************************************************************** @@ -819,40 +826,45 @@ int SetEvent(DEVICE_EXTENSION *pdx, TRANSFEREVENT __user*pTE) ** of times that a block met the event condition since we last cleared it or ** 0 if timed out, or -ve error (bad area or not set, or signal). ****************************************************************************/ -int WaitEvent(DEVICE_EXTENSION *pdx, int nArea, int msTimeOut) +int WaitEvent(DEVICE_EXTENSION * pdx, int nArea, int msTimeOut) { - int iReturn; - if ((unsigned)nArea > MAX_TRANSAREAS) - return U14ERR_BADAREA; - else - { - int iWait; - TRANSAREA *pTA = &pdx->rTransDef[nArea]; - msTimeOut = (msTimeOut * HZ + 999)/1000; // convert timeout to jiffies - - // We cannot wait holding the mutex, but we check the flags while holding - // it. This may well be pointless as another thread could get in between - // releasing it and the wait call. However, this would have to clear the - // iWakeUp flag. However, the !pTA-bUsed may help us in this case. - mutex_lock(&pdx->io_mutex); // make sure we have no competitor - if (!pTA->bUsed || !pTA->dwEventSz) // check something to wait for... - return U14ERR_NOTSET; // ...else we do nothing - mutex_unlock(&pdx->io_mutex); - - if (msTimeOut) - iWait = wait_event_interruptible_timeout(pTA->wqEvent, pTA->iWakeUp || !pTA->bUsed, msTimeOut); - else - iWait = wait_event_interruptible(pTA->wqEvent, pTA->iWakeUp || !pTA->bUsed); - if (iWait) - iReturn = -ERESTARTSYS; // oops - we have had a SIGNAL - else - iReturn = pTA->iWakeUp; // else the wakeup count - - spin_lock_irq(&pdx->stagedLock); - pTA->iWakeUp = 0; // clear the flag - spin_unlock_irq(&pdx->stagedLock); - } - return iReturn; + int iReturn; + if ((unsigned)nArea > MAX_TRANSAREAS) + return U14ERR_BADAREA; + else { + int iWait; + TRANSAREA *pTA = &pdx->rTransDef[nArea]; + msTimeOut = (msTimeOut * HZ + 999) / 1000; // convert timeout to jiffies + + // We cannot wait holding the mutex, but we check the flags while holding + // it. This may well be pointless as another thread could get in between + // releasing it and the wait call. However, this would have to clear the + // iWakeUp flag. However, the !pTA-bUsed may help us in this case. + mutex_lock(&pdx->io_mutex); // make sure we have no competitor + if (!pTA->bUsed || !pTA->dwEventSz) // check something to wait for... + return U14ERR_NOTSET; // ...else we do nothing + mutex_unlock(&pdx->io_mutex); + + if (msTimeOut) + iWait = + wait_event_interruptible_timeout(pTA->wqEvent, + pTA->iWakeUp + || !pTA->bUsed, + msTimeOut); + else + iWait = + wait_event_interruptible(pTA->wqEvent, pTA->iWakeUp + || !pTA->bUsed); + if (iWait) + iReturn = -ERESTARTSYS; // oops - we have had a SIGNAL + else + iReturn = pTA->iWakeUp; // else the wakeup count + + spin_lock_irq(&pdx->stagedLock); + pTA->iWakeUp = 0; // clear the flag + spin_unlock_irq(&pdx->stagedLock); + } + return iReturn; } /**************************************************************************** @@ -861,52 +873,51 @@ int WaitEvent(DEVICE_EXTENSION *pdx, int nArea, int msTimeOut) ** number of times a block completed since the last call, or 0 if none or a ** negative error. ****************************************************************************/ -int TestEvent(DEVICE_EXTENSION *pdx, int nArea) +int TestEvent(DEVICE_EXTENSION * pdx, int nArea) { - int iReturn; - if ((unsigned)nArea > MAX_TRANSAREAS) - iReturn = U14ERR_BADAREA; - else - { - TRANSAREA *pTA = &pdx->rTransDef[nArea]; - mutex_lock(&pdx->io_mutex); // make sure we have no competitor - spin_lock_irq(&pdx->stagedLock); - iReturn = pTA->iWakeUp; // get wakeup count since last call - pTA->iWakeUp = 0; // clear the count - spin_unlock_irq(&pdx->stagedLock); - mutex_unlock(&pdx->io_mutex); - } - return iReturn; + int iReturn; + if ((unsigned)nArea > MAX_TRANSAREAS) + iReturn = U14ERR_BADAREA; + else { + TRANSAREA *pTA = &pdx->rTransDef[nArea]; + mutex_lock(&pdx->io_mutex); // make sure we have no competitor + spin_lock_irq(&pdx->stagedLock); + iReturn = pTA->iWakeUp; // get wakeup count since last call + pTA->iWakeUp = 0; // clear the count + spin_unlock_irq(&pdx->stagedLock); + mutex_unlock(&pdx->io_mutex); + } + return iReturn; } /**************************************************************************** ** GetTransferInfo ** Puts the current state of the 1401 in a TGET_TX_BLOCK. *****************************************************************************/ -int GetTransfer(DEVICE_EXTENSION *pdx, TGET_TX_BLOCK __user *pTX) +int GetTransfer(DEVICE_EXTENSION * pdx, TGET_TX_BLOCK __user * pTX) { - int iReturn = U14ERR_NOERROR; - unsigned int dwIdent; - - mutex_lock(&pdx->io_mutex); - dwIdent = pdx->StagedId; // area ident for last xfer - if (dwIdent >= MAX_TRANSAREAS) - iReturn = U14ERR_BADAREA; - else - { - // Return the best information we have - we don't have physical addresses - TGET_TX_BLOCK tx; - memset(&tx, 0, sizeof(tx)); // clean out local work structure - tx.size = pdx->rTransDef[dwIdent].dwLength; - tx.linear = (long long)((long)pdx->rTransDef[dwIdent].lpvBuff); - tx.avail = GET_TX_MAXENTRIES; // how many blocks we could return - tx.used = 1; // number we actually return - tx.entries[0].physical = (long long)(tx.linear+pdx->StagedOffset); - tx.entries[0].size = tx.size; - copy_to_user(pTX, &tx, sizeof(tx)); - } - mutex_unlock(&pdx->io_mutex); - return iReturn; + int iReturn = U14ERR_NOERROR; + unsigned int dwIdent; + + mutex_lock(&pdx->io_mutex); + dwIdent = pdx->StagedId; // area ident for last xfer + if (dwIdent >= MAX_TRANSAREAS) + iReturn = U14ERR_BADAREA; + else { + // Return the best information we have - we don't have physical addresses + TGET_TX_BLOCK tx; + memset(&tx, 0, sizeof(tx)); // clean out local work structure + tx.size = pdx->rTransDef[dwIdent].dwLength; + tx.linear = (long long)((long)pdx->rTransDef[dwIdent].lpvBuff); + tx.avail = GET_TX_MAXENTRIES; // how many blocks we could return + tx.used = 1; // number we actually return + tx.entries[0].physical = + (long long)(tx.linear + pdx->StagedOffset); + tx.entries[0].size = tx.size; + copy_to_user(pTX, &tx, sizeof(tx)); + } + mutex_unlock(&pdx->io_mutex); + return iReturn; } /**************************************************************************** @@ -914,14 +925,14 @@ int GetTransfer(DEVICE_EXTENSION *pdx, TGET_TX_BLOCK __user *pTX) ** ** Empties the host i/o buffers ****************************************************************************/ -int KillIO1401(DEVICE_EXTENSION *pdx) +int KillIO1401(DEVICE_EXTENSION * pdx) { - dev_dbg(&pdx->interface->dev, "%s", __func__); - mutex_lock(&pdx->io_mutex); - FlushOutBuff(pdx); - FlushInBuff(pdx); - mutex_unlock(&pdx->io_mutex); - return U14ERR_NOERROR; + dev_dbg(&pdx->interface->dev, "%s", __func__); + mutex_lock(&pdx->io_mutex); + FlushOutBuff(pdx); + FlushInBuff(pdx); + mutex_unlock(&pdx->io_mutex); + return U14ERR_NOERROR; } /**************************************************************************** @@ -929,11 +940,11 @@ int KillIO1401(DEVICE_EXTENSION *pdx) ** Returns a 0 or a 1 for whether DMA is happening. No point holding a mutex ** for this as it only does one read. *****************************************************************************/ -int BlkTransState(DEVICE_EXTENSION *pdx) +int BlkTransState(DEVICE_EXTENSION * pdx) { - int iReturn = pdx->dwDMAFlag != MODE_CHAR; - dev_dbg(&pdx->interface->dev, "%s = %d", __func__, iReturn); - return iReturn; + int iReturn = pdx->dwDMAFlag != MODE_CHAR; + dev_dbg(&pdx->interface->dev, "%s = %d", __func__, iReturn); + return iReturn; } /**************************************************************************** @@ -941,121 +952,121 @@ int BlkTransState(DEVICE_EXTENSION *pdx) ** ** Puts the current state of the 1401 in the Irp return buffer. *****************************************************************************/ -int StateOf1401(DEVICE_EXTENSION *pdx) +int StateOf1401(DEVICE_EXTENSION * pdx) { - int iReturn; - mutex_lock(&pdx->io_mutex); + int iReturn; + mutex_lock(&pdx->io_mutex); - QuickCheck(pdx, false, false); // get state up to date, no reset - iReturn = pdx->sCurrentState; + QuickCheck(pdx, false, false); // get state up to date, no reset + iReturn = pdx->sCurrentState; - mutex_unlock(&pdx->io_mutex); - dev_dbg(&pdx->interface->dev, "%s = %d", __func__, iReturn); + mutex_unlock(&pdx->io_mutex); + dev_dbg(&pdx->interface->dev, "%s = %d", __func__, iReturn); - return iReturn; + return iReturn; } + /**************************************************************************** ** StartSelfTest ** ** Initiates a self-test cycle. The assumption is that we have no interrupts ** active, so we should make sure that this is the case. *****************************************************************************/ -int StartSelfTest(DEVICE_EXTENSION *pdx) +int StartSelfTest(DEVICE_EXTENSION * pdx) { - int nGot; - mutex_lock(&pdx->io_mutex); - dev_dbg(&pdx->interface->dev, "%s", __func__); + int nGot; + mutex_lock(&pdx->io_mutex); + dev_dbg(&pdx->interface->dev, "%s", __func__); - ced_draw_down(pdx); // wait for, then kill outstanding Urbs - FlushInBuff(pdx); // Clear out input buffer & pipe - FlushOutBuff(pdx); // Clear output buffer & pipe + ced_draw_down(pdx); // wait for, then kill outstanding Urbs + FlushInBuff(pdx); // Clear out input buffer & pipe + FlushOutBuff(pdx); // Clear output buffer & pipe // ReadWrite_Cancel(pDeviceObject); /* so things stay tidy */ - pdx->dwDMAFlag = MODE_CHAR; /* Clear DMA mode flags here */ + pdx->dwDMAFlag = MODE_CHAR; /* Clear DMA mode flags here */ - nGot = usb_control_msg(pdx->udev, usb_rcvctrlpipe(pdx->udev, 0), - DB_SELFTEST, (H_TO_D|VENDOR|DEVREQ), 0, 0, - 0, 0, HZ); // allow 1 second timeout - pdx->ulSelfTestTime = jiffies + HZ*30; // 30 seconds into the future + nGot = usb_control_msg(pdx->udev, usb_rcvctrlpipe(pdx->udev, 0), DB_SELFTEST, (H_TO_D | VENDOR | DEVREQ), 0, 0, 0, 0, HZ); // allow 1 second timeout + pdx->ulSelfTestTime = jiffies + HZ * 30; // 30 seconds into the future - mutex_unlock(&pdx->io_mutex); - if (nGot < 0) - dev_err(&pdx->interface->dev, "%s err=%d", __func__, nGot); - return nGot < 0 ? U14ERR_FAIL : U14ERR_NOERROR; + mutex_unlock(&pdx->io_mutex); + if (nGot < 0) + dev_err(&pdx->interface->dev, "%s err=%d", __func__, nGot); + return nGot < 0 ? U14ERR_FAIL : U14ERR_NOERROR; } - /**************************************************************************** ** CheckSelfTest ** ** Check progress of a self-test cycle ****************************************************************************/ -int CheckSelfTest(DEVICE_EXTENSION *pdx, TGET_SELFTEST __user *pGST) +int CheckSelfTest(DEVICE_EXTENSION * pdx, TGET_SELFTEST __user * pGST) { - unsigned int state, error; - int iReturn; - TGET_SELFTEST gst; // local work space - memset(&gst, 0, sizeof(gst)); // clear out the space (sets code 0) - - mutex_lock(&pdx->io_mutex); - - dev_dbg(&pdx->interface->dev, "%s", __func__); - iReturn = Get1401State(pdx, &state, &error); - if (iReturn == U14ERR_NOERROR) // Only accept zero if it happens twice - iReturn = Get1401State(pdx, &state, &error); - - if (iReturn != U14ERR_NOERROR) // Self-test can cause comms errors - { // so we assume still testing - dev_err(&pdx->interface->dev, "%s Get1401State=%d, assuming still testing", __func__, iReturn); - state = 0x80; // Force still-testing, no error - error = 0; - iReturn = U14ERR_NOERROR; - } - - if ((state == -1) && (error == -1)) // If Get1401State had problems - { - dev_err(&pdx->interface->dev, "%s Get1401State failed, assuming still testing", __func__); - state = 0x80; // Force still-testing, no error - error = 0; - } - - if ((state & 0xFF) == 0x80) // If we are still in self-test - { - if (state & 0x00FF0000) // Have we got an error? - { - gst.code = (state & 0x00FF0000) >> 16; // read the error code - gst.x = error & 0x0000FFFF; // Error data X - gst.y = (error & 0xFFFF0000) >> 16; // and data Y - dev_dbg(&pdx->interface->dev,"Self-test error code %d", gst.code); - } - else // No error, check for timeout - { - unsigned long ulNow = jiffies; // get current time - if (time_after(ulNow, pdx->ulSelfTestTime)) - { - gst.code = -2; // Flag the timeout - dev_dbg(&pdx->interface->dev, "Self-test timed-out"); - } - else - dev_dbg(&pdx->interface->dev, "Self-test on-going"); - } - } - else - { - gst.code = -1; // Flag the test is done - dev_dbg(&pdx->interface->dev, "Self-test done"); - } - - if (gst.code < 0) // If we have a problem or finished - { // If using the 2890 we should reset properly - if ((pdx->nPipes == 4) && (pdx->s1401Type <= TYPEPOWER)) - Is1401(pdx); // Get 1401 reset and OK - else - QuickCheck(pdx, true, true); // Otherwise check without reset unless problems - } - mutex_unlock(&pdx->io_mutex); - - copy_to_user(pGST, &gst, sizeof(gst)); // copy result to user space - return iReturn; + unsigned int state, error; + int iReturn; + TGET_SELFTEST gst; // local work space + memset(&gst, 0, sizeof(gst)); // clear out the space (sets code 0) + + mutex_lock(&pdx->io_mutex); + + dev_dbg(&pdx->interface->dev, "%s", __func__); + iReturn = Get1401State(pdx, &state, &error); + if (iReturn == U14ERR_NOERROR) // Only accept zero if it happens twice + iReturn = Get1401State(pdx, &state, &error); + + if (iReturn != U14ERR_NOERROR) // Self-test can cause comms errors + { // so we assume still testing + dev_err(&pdx->interface->dev, + "%s Get1401State=%d, assuming still testing", __func__, + iReturn); + state = 0x80; // Force still-testing, no error + error = 0; + iReturn = U14ERR_NOERROR; + } + + if ((state == -1) && (error == -1)) // If Get1401State had problems + { + dev_err(&pdx->interface->dev, + "%s Get1401State failed, assuming still testing", + __func__); + state = 0x80; // Force still-testing, no error + error = 0; + } + + if ((state & 0xFF) == 0x80) // If we are still in self-test + { + if (state & 0x00FF0000) // Have we got an error? + { + gst.code = (state & 0x00FF0000) >> 16; // read the error code + gst.x = error & 0x0000FFFF; // Error data X + gst.y = (error & 0xFFFF0000) >> 16; // and data Y + dev_dbg(&pdx->interface->dev, "Self-test error code %d", + gst.code); + } else // No error, check for timeout + { + unsigned long ulNow = jiffies; // get current time + if (time_after(ulNow, pdx->ulSelfTestTime)) { + gst.code = -2; // Flag the timeout + dev_dbg(&pdx->interface->dev, + "Self-test timed-out"); + } else + dev_dbg(&pdx->interface->dev, + "Self-test on-going"); + } + } else { + gst.code = -1; // Flag the test is done + dev_dbg(&pdx->interface->dev, "Self-test done"); + } + + if (gst.code < 0) // If we have a problem or finished + { // If using the 2890 we should reset properly + if ((pdx->nPipes == 4) && (pdx->s1401Type <= TYPEPOWER)) + Is1401(pdx); // Get 1401 reset and OK + else + QuickCheck(pdx, true, true); // Otherwise check without reset unless problems + } + mutex_unlock(&pdx->io_mutex); + + copy_to_user(pGST, &gst, sizeof(gst)); // copy result to user space + return iReturn; } /**************************************************************************** @@ -1063,28 +1074,32 @@ int CheckSelfTest(DEVICE_EXTENSION *pdx, TGET_SELFTEST __user *pGST) ** ** Returns code for standard, plus, micro1401, power1401 or none ****************************************************************************/ -int TypeOf1401(DEVICE_EXTENSION *pdx) +int TypeOf1401(DEVICE_EXTENSION * pdx) { - int iReturn = TYPEUNKNOWN; - mutex_lock(&pdx->io_mutex); - dev_dbg(&pdx->interface->dev, "%s", __func__); - - switch (pdx->s1401Type) - { - case TYPE1401: iReturn = U14ERR_STD; break; // Handle these types directly - case TYPEPLUS: iReturn = U14ERR_PLUS; break; - case TYPEU1401:iReturn = U14ERR_U1401;break; - default: - if ((pdx->s1401Type >= TYPEPOWER) && - (pdx->s1401Type <= 25)) - iReturn = pdx->s1401Type + 4; // We can calculate types - else // for up-coming 1401 designs - iReturn = TYPEUNKNOWN; // Don't know or not there - } - dev_dbg(&pdx->interface->dev, "%s %d", __func__, iReturn); - mutex_unlock(&pdx->io_mutex); - - return iReturn; + int iReturn = TYPEUNKNOWN; + mutex_lock(&pdx->io_mutex); + dev_dbg(&pdx->interface->dev, "%s", __func__); + + switch (pdx->s1401Type) { + case TYPE1401: + iReturn = U14ERR_STD; + break; // Handle these types directly + case TYPEPLUS: + iReturn = U14ERR_PLUS; + break; + case TYPEU1401: + iReturn = U14ERR_U1401; + break; + default: + if ((pdx->s1401Type >= TYPEPOWER) && (pdx->s1401Type <= 25)) + iReturn = pdx->s1401Type + 4; // We can calculate types + else // for up-coming 1401 designs + iReturn = TYPEUNKNOWN; // Don't know or not there + } + dev_dbg(&pdx->interface->dev, "%s %d", __func__, iReturn); + mutex_unlock(&pdx->io_mutex); + + return iReturn; } /**************************************************************************** @@ -1092,17 +1107,17 @@ int TypeOf1401(DEVICE_EXTENSION *pdx) ** ** Returns flags on block transfer abilities ****************************************************************************/ -int TransferFlags(DEVICE_EXTENSION *pdx) +int TransferFlags(DEVICE_EXTENSION * pdx) { - int iReturn = U14TF_MULTIA | U14TF_DIAG | // we always have multiple DMA area - U14TF_NOTIFY | U14TF_CIRCTH; // diagnostics, notify and circular - dev_dbg(&pdx->interface->dev, "%s", __func__); - mutex_lock(&pdx->io_mutex); - if (pdx->bIsUSB2) // Set flag for USB2 if appropriate - iReturn |= U14TF_USB2; - mutex_unlock(&pdx->io_mutex); - - return iReturn; + int iReturn = U14TF_MULTIA | U14TF_DIAG | // we always have multiple DMA area + U14TF_NOTIFY | U14TF_CIRCTH; // diagnostics, notify and circular + dev_dbg(&pdx->interface->dev, "%s", __func__); + mutex_lock(&pdx->io_mutex); + if (pdx->bIsUSB2) // Set flag for USB2 if appropriate + iReturn |= U14TF_USB2; + mutex_unlock(&pdx->io_mutex); + + return iReturn; } /*************************************************************************** @@ -1110,18 +1125,17 @@ int TransferFlags(DEVICE_EXTENSION *pdx) ** Issues a debug\diagnostic command to the 1401 along with a 32-bit datum ** This is a utility command used for dbg operations. */ -static int DbgCmd1401(DEVICE_EXTENSION *pdx, unsigned char cmd, unsigned int data) +static int DbgCmd1401(DEVICE_EXTENSION * pdx, unsigned char cmd, + unsigned int data) { - int iReturn; - dev_dbg(&pdx->interface->dev, "%s entry", __func__); - iReturn = usb_control_msg(pdx->udev, usb_sndctrlpipe(pdx->udev, 0), - cmd, (H_TO_D|VENDOR|DEVREQ), - (unsigned short)data, (unsigned short)(data >> 16), - 0, 0, HZ); // allow 1 second timeout - if (iReturn < 0) - dev_err(&pdx->interface->dev, "%s fail code=%d", __func__, iReturn); - - return iReturn; + int iReturn; + dev_dbg(&pdx->interface->dev, "%s entry", __func__); + iReturn = usb_control_msg(pdx->udev, usb_sndctrlpipe(pdx->udev, 0), cmd, (H_TO_D | VENDOR | DEVREQ), (unsigned short)data, (unsigned short)(data >> 16), 0, 0, HZ); // allow 1 second timeout + if (iReturn < 0) + dev_err(&pdx->interface->dev, "%s fail code=%d", __func__, + iReturn); + + return iReturn; } /**************************************************************************** @@ -1129,146 +1143,141 @@ static int DbgCmd1401(DEVICE_EXTENSION *pdx, unsigned char cmd, unsigned int dat ** ** Execute the diagnostic peek operation. Uses address, width and repeats. ****************************************************************************/ -int DbgPeek(DEVICE_EXTENSION *pdx, TDBGBLOCK __user* pDB) +int DbgPeek(DEVICE_EXTENSION * pdx, TDBGBLOCK __user * pDB) { - int iReturn; - TDBGBLOCK db; - copy_from_user(&db, pDB, sizeof(db)); // get the data - - mutex_lock(&pdx->io_mutex); - dev_dbg(&pdx->interface->dev, "%s @ %08x", __func__, db.iAddr); - - iReturn = DbgCmd1401(pdx, DB_SETADD, db.iAddr); - if (iReturn == U14ERR_NOERROR) - iReturn = DbgCmd1401(pdx, DB_WIDTH, db.iWidth); - if (iReturn == U14ERR_NOERROR) - iReturn = DbgCmd1401(pdx, DB_REPEATS, db.iRepeats); - if (iReturn == U14ERR_NOERROR) - iReturn = DbgCmd1401(pdx, DB_PEEK, 0); - mutex_unlock(&pdx->io_mutex); - - return iReturn; + int iReturn; + TDBGBLOCK db; + copy_from_user(&db, pDB, sizeof(db)); // get the data + + mutex_lock(&pdx->io_mutex); + dev_dbg(&pdx->interface->dev, "%s @ %08x", __func__, db.iAddr); + + iReturn = DbgCmd1401(pdx, DB_SETADD, db.iAddr); + if (iReturn == U14ERR_NOERROR) + iReturn = DbgCmd1401(pdx, DB_WIDTH, db.iWidth); + if (iReturn == U14ERR_NOERROR) + iReturn = DbgCmd1401(pdx, DB_REPEATS, db.iRepeats); + if (iReturn == U14ERR_NOERROR) + iReturn = DbgCmd1401(pdx, DB_PEEK, 0); + mutex_unlock(&pdx->io_mutex); + + return iReturn; } - /**************************************************************************** ** DbgPoke ** ** Execute the diagnostic poke operation. Parameters are in the CSBLOCK struct ** in order address, size, repeats and value to poke. ****************************************************************************/ -int DbgPoke(DEVICE_EXTENSION *pdx, TDBGBLOCK __user *pDB) +int DbgPoke(DEVICE_EXTENSION * pdx, TDBGBLOCK __user * pDB) { - int iReturn; - TDBGBLOCK db; - copy_from_user(&db, pDB, sizeof(db)); // get the data - - mutex_lock(&pdx->io_mutex); - dev_dbg(&pdx->interface->dev, "%s @ %08x", __func__, db.iAddr); - - iReturn = DbgCmd1401(pdx, DB_SETADD, db.iAddr); - if (iReturn == U14ERR_NOERROR) - iReturn = DbgCmd1401(pdx, DB_WIDTH, db.iWidth); - if (iReturn == U14ERR_NOERROR) - iReturn = DbgCmd1401(pdx, DB_REPEATS, db.iRepeats); - if (iReturn == U14ERR_NOERROR) - iReturn = DbgCmd1401(pdx, DB_POKE, db.iData); - mutex_unlock(&pdx->io_mutex); - - return iReturn; + int iReturn; + TDBGBLOCK db; + copy_from_user(&db, pDB, sizeof(db)); // get the data + + mutex_lock(&pdx->io_mutex); + dev_dbg(&pdx->interface->dev, "%s @ %08x", __func__, db.iAddr); + + iReturn = DbgCmd1401(pdx, DB_SETADD, db.iAddr); + if (iReturn == U14ERR_NOERROR) + iReturn = DbgCmd1401(pdx, DB_WIDTH, db.iWidth); + if (iReturn == U14ERR_NOERROR) + iReturn = DbgCmd1401(pdx, DB_REPEATS, db.iRepeats); + if (iReturn == U14ERR_NOERROR) + iReturn = DbgCmd1401(pdx, DB_POKE, db.iData); + mutex_unlock(&pdx->io_mutex); + + return iReturn; } - /**************************************************************************** ** DbgRampData ** ** Execute the diagnostic ramp data operation. Parameters are in the CSBLOCK struct ** in order address, default, enable mask, size and repeats. ****************************************************************************/ -int DbgRampData(DEVICE_EXTENSION *pdx, TDBGBLOCK __user *pDB) +int DbgRampData(DEVICE_EXTENSION * pdx, TDBGBLOCK __user * pDB) { - int iReturn; - TDBGBLOCK db; - copy_from_user(&db, pDB, sizeof(db)); // get the data - - mutex_lock(&pdx->io_mutex); - dev_dbg(&pdx->interface->dev, "%s @ %08x", __func__, db.iAddr); - - iReturn = DbgCmd1401(pdx, DB_SETADD, db.iAddr); - if (iReturn == U14ERR_NOERROR) - iReturn = DbgCmd1401(pdx, DB_SETDEF, db.iDefault); - if (iReturn == U14ERR_NOERROR) - iReturn = DbgCmd1401(pdx, DB_SETMASK, db.iMask); - if (iReturn == U14ERR_NOERROR) - iReturn = DbgCmd1401(pdx, DB_WIDTH, db.iWidth); - if (iReturn == U14ERR_NOERROR) - iReturn = DbgCmd1401(pdx, DB_REPEATS, db.iRepeats); - if (iReturn == U14ERR_NOERROR) - iReturn = DbgCmd1401(pdx, DB_RAMPD, 0); - mutex_unlock(&pdx->io_mutex); - - return iReturn; + int iReturn; + TDBGBLOCK db; + copy_from_user(&db, pDB, sizeof(db)); // get the data + + mutex_lock(&pdx->io_mutex); + dev_dbg(&pdx->interface->dev, "%s @ %08x", __func__, db.iAddr); + + iReturn = DbgCmd1401(pdx, DB_SETADD, db.iAddr); + if (iReturn == U14ERR_NOERROR) + iReturn = DbgCmd1401(pdx, DB_SETDEF, db.iDefault); + if (iReturn == U14ERR_NOERROR) + iReturn = DbgCmd1401(pdx, DB_SETMASK, db.iMask); + if (iReturn == U14ERR_NOERROR) + iReturn = DbgCmd1401(pdx, DB_WIDTH, db.iWidth); + if (iReturn == U14ERR_NOERROR) + iReturn = DbgCmd1401(pdx, DB_REPEATS, db.iRepeats); + if (iReturn == U14ERR_NOERROR) + iReturn = DbgCmd1401(pdx, DB_RAMPD, 0); + mutex_unlock(&pdx->io_mutex); + + return iReturn; } - /**************************************************************************** ** DbgRampAddr ** ** Execute the diagnostic ramp address operation ****************************************************************************/ -int DbgRampAddr(DEVICE_EXTENSION *pdx, TDBGBLOCK __user *pDB) +int DbgRampAddr(DEVICE_EXTENSION * pdx, TDBGBLOCK __user * pDB) { - int iReturn; - TDBGBLOCK db; - copy_from_user(&db, pDB, sizeof(db)); // get the data - - mutex_lock(&pdx->io_mutex); - dev_dbg(&pdx->interface->dev, "%s", __func__); - - iReturn = DbgCmd1401(pdx, DB_SETDEF, db.iDefault); - if (iReturn == U14ERR_NOERROR) - iReturn = DbgCmd1401(pdx, DB_SETMASK, db.iMask); - if (iReturn == U14ERR_NOERROR) - iReturn = DbgCmd1401(pdx, DB_WIDTH, db.iWidth); - if (iReturn == U14ERR_NOERROR) - iReturn = DbgCmd1401(pdx, DB_REPEATS, db.iRepeats); - if (iReturn == U14ERR_NOERROR) - iReturn = DbgCmd1401(pdx, DB_RAMPA, 0); - mutex_unlock(&pdx->io_mutex); - - return iReturn; + int iReturn; + TDBGBLOCK db; + copy_from_user(&db, pDB, sizeof(db)); // get the data + + mutex_lock(&pdx->io_mutex); + dev_dbg(&pdx->interface->dev, "%s", __func__); + + iReturn = DbgCmd1401(pdx, DB_SETDEF, db.iDefault); + if (iReturn == U14ERR_NOERROR) + iReturn = DbgCmd1401(pdx, DB_SETMASK, db.iMask); + if (iReturn == U14ERR_NOERROR) + iReturn = DbgCmd1401(pdx, DB_WIDTH, db.iWidth); + if (iReturn == U14ERR_NOERROR) + iReturn = DbgCmd1401(pdx, DB_REPEATS, db.iRepeats); + if (iReturn == U14ERR_NOERROR) + iReturn = DbgCmd1401(pdx, DB_RAMPA, 0); + mutex_unlock(&pdx->io_mutex); + + return iReturn; } - /**************************************************************************** ** DbgGetData ** ** Retrieve the data resulting from the last debug Peek operation ****************************************************************************/ -int DbgGetData(DEVICE_EXTENSION *pdx, TDBGBLOCK __user *pDB) +int DbgGetData(DEVICE_EXTENSION * pdx, TDBGBLOCK __user * pDB) { - int iReturn; - TDBGBLOCK db; - memset(&db, 0, sizeof(db)); // fill returned block with 0s - - mutex_lock(&pdx->io_mutex); - dev_dbg(&pdx->interface->dev, "%s", __func__); - - // Read back the last peeked value from the 1401. - iReturn = usb_control_msg(pdx->udev, usb_rcvctrlpipe(pdx->udev, 0), - DB_DATA, (D_TO_H|VENDOR|DEVREQ), 0,0, - &db.iData, sizeof(db.iData), HZ); - if (iReturn == sizeof(db.iData)) - { - copy_to_user(pDB, &db, sizeof(db)); - iReturn = U14ERR_NOERROR; - } - else - dev_err(&pdx->interface->dev, "%s failed, code %d", __func__, iReturn); - - mutex_unlock(&pdx->io_mutex); - - return iReturn; + int iReturn; + TDBGBLOCK db; + memset(&db, 0, sizeof(db)); // fill returned block with 0s + + mutex_lock(&pdx->io_mutex); + dev_dbg(&pdx->interface->dev, "%s", __func__); + + // Read back the last peeked value from the 1401. + iReturn = usb_control_msg(pdx->udev, usb_rcvctrlpipe(pdx->udev, 0), + DB_DATA, (D_TO_H | VENDOR | DEVREQ), 0, 0, + &db.iData, sizeof(db.iData), HZ); + if (iReturn == sizeof(db.iData)) { + copy_to_user(pDB, &db, sizeof(db)); + iReturn = U14ERR_NOERROR; + } else + dev_err(&pdx->interface->dev, "%s failed, code %d", __func__, + iReturn); + + mutex_unlock(&pdx->io_mutex); + + return iReturn; } /**************************************************************************** @@ -1277,20 +1286,19 @@ int DbgGetData(DEVICE_EXTENSION *pdx, TDBGBLOCK __user *pDB) ** Stop any never-ending debug loop, we just call Get1401State for USB ** ****************************************************************************/ -int DbgStopLoop(DEVICE_EXTENSION *pdx) +int DbgStopLoop(DEVICE_EXTENSION * pdx) { - int iReturn; - unsigned int uState, uErr; + int iReturn; + unsigned int uState, uErr; - mutex_lock(&pdx->io_mutex); - dev_dbg(&pdx->interface->dev, "%s", __func__); - iReturn = Get1401State(pdx, &uState, &uErr); - mutex_unlock(&pdx->io_mutex); + mutex_lock(&pdx->io_mutex); + dev_dbg(&pdx->interface->dev, "%s", __func__); + iReturn = Get1401State(pdx, &uState, &uErr); + mutex_unlock(&pdx->io_mutex); - return iReturn; + return iReturn; } - /**************************************************************************** ** SetCircular ** @@ -1299,22 +1307,26 @@ int DbgStopLoop(DEVICE_EXTENSION *pdx) ** booked and a transfer to that area is in progress. Otherwise, we will ** release the area and re-assign it. ****************************************************************************/ -int SetCircular(DEVICE_EXTENSION *pdx, TRANSFERDESC __user *pTD) +int SetCircular(DEVICE_EXTENSION * pdx, TRANSFERDESC __user * pTD) { - int iReturn; - bool bToHost; - TRANSFERDESC td; - copy_from_user(&td, pTD, sizeof(td)); - mutex_lock(&pdx->io_mutex); - dev_dbg(&pdx->interface->dev,"%s area:%d, size:%08x", __func__, td.wAreaNum, td.dwLength); - bToHost = td.eSize != 0; // this is used as the tohost flag - - // The strange cast is done so that we don't get warnings in 32-bit linux about the size of the - // pointer. The pointer is always passed as a 64-bit object so that we don't have problems using - // a 32-bit program on a 64-bit system. unsigned long is 64-bits on a 64-bit system. - iReturn = SetArea(pdx, td.wAreaNum, (char __user *)((unsigned long)td.lpvBuff), td.dwLength, true, bToHost); - mutex_unlock(&pdx->io_mutex); - return iReturn; + int iReturn; + bool bToHost; + TRANSFERDESC td; + copy_from_user(&td, pTD, sizeof(td)); + mutex_lock(&pdx->io_mutex); + dev_dbg(&pdx->interface->dev, "%s area:%d, size:%08x", __func__, + td.wAreaNum, td.dwLength); + bToHost = td.eSize != 0; // this is used as the tohost flag + + // The strange cast is done so that we don't get warnings in 32-bit linux about the size of the + // pointer. The pointer is always passed as a 64-bit object so that we don't have problems using + // a 32-bit program on a 64-bit system. unsigned long is 64-bits on a 64-bit system. + iReturn = + SetArea(pdx, td.wAreaNum, + (char __user *)((unsigned long)td.lpvBuff), td.dwLength, + true, bToHost); + mutex_unlock(&pdx->io_mutex); + return iReturn; } /**************************************************************************** @@ -1322,140 +1334,145 @@ int SetCircular(DEVICE_EXTENSION *pdx, TRANSFERDESC __user *pTD) ** ** Return the next available block of circularly-transferred data. ****************************************************************************/ -int GetCircBlock(DEVICE_EXTENSION *pdx, TCIRCBLOCK __user* pCB) +int GetCircBlock(DEVICE_EXTENSION * pdx, TCIRCBLOCK __user * pCB) { - int iReturn = U14ERR_NOERROR; - unsigned int nArea; - TCIRCBLOCK cb; - dev_dbg(&pdx->interface->dev, "%s", __func__); - copy_from_user(&cb, pCB, sizeof(cb)); - mutex_lock(&pdx->io_mutex); - - nArea = cb.nArea; // Retrieve parameters first - cb.dwOffset = 0; // set default result (nothing) - cb.dwSize = 0; - - if (nArea < MAX_TRANSAREAS) // The area number must be OK - { - TRANSAREA* pArea = &pdx->rTransDef[nArea]; // Pointer to relevant info - spin_lock_irq(&pdx->stagedLock); // Lock others out - - if ((pArea->bUsed) && (pArea->bCircular) && // Must be circular area - (pArea->bCircToHost)) // For now at least must be to host - { - if (pArea->aBlocks[0].dwSize > 0) // Got anything? - { - cb.dwOffset = pArea->aBlocks[0].dwOffset; - cb.dwSize = pArea->aBlocks[0].dwSize; - dev_dbg(&pdx->interface->dev, "%s return block 0: %d bytes at %d", __func__, cb.dwSize, cb.dwOffset); - } - } - else - iReturn = U14ERR_NOTSET; - - spin_unlock_irq(&pdx->stagedLock); - } - else - iReturn = U14ERR_BADAREA; - - copy_to_user(pCB, &cb, sizeof(cb)); - mutex_unlock(&pdx->io_mutex); - return iReturn; + int iReturn = U14ERR_NOERROR; + unsigned int nArea; + TCIRCBLOCK cb; + dev_dbg(&pdx->interface->dev, "%s", __func__); + copy_from_user(&cb, pCB, sizeof(cb)); + mutex_lock(&pdx->io_mutex); + + nArea = cb.nArea; // Retrieve parameters first + cb.dwOffset = 0; // set default result (nothing) + cb.dwSize = 0; + + if (nArea < MAX_TRANSAREAS) // The area number must be OK + { + TRANSAREA *pArea = &pdx->rTransDef[nArea]; // Pointer to relevant info + spin_lock_irq(&pdx->stagedLock); // Lock others out + + if ((pArea->bUsed) && (pArea->bCircular) && // Must be circular area + (pArea->bCircToHost)) // For now at least must be to host + { + if (pArea->aBlocks[0].dwSize > 0) // Got anything? + { + cb.dwOffset = pArea->aBlocks[0].dwOffset; + cb.dwSize = pArea->aBlocks[0].dwSize; + dev_dbg(&pdx->interface->dev, + "%s return block 0: %d bytes at %d", + __func__, cb.dwSize, cb.dwOffset); + } + } else + iReturn = U14ERR_NOTSET; + + spin_unlock_irq(&pdx->stagedLock); + } else + iReturn = U14ERR_BADAREA; + + copy_to_user(pCB, &cb, sizeof(cb)); + mutex_unlock(&pdx->io_mutex); + return iReturn; } - /**************************************************************************** ** FreeCircBlock ** ** Frees a block of circularly-transferred data and returns the next one. ****************************************************************************/ -int FreeCircBlock(DEVICE_EXTENSION *pdx, TCIRCBLOCK __user* pCB) +int FreeCircBlock(DEVICE_EXTENSION * pdx, TCIRCBLOCK __user * pCB) { - int iReturn = U14ERR_NOERROR; - unsigned int nArea, uStart, uSize; - TCIRCBLOCK cb; - dev_dbg(&pdx->interface->dev, "%s", __func__); - copy_from_user(&cb, pCB, sizeof(cb)); - mutex_lock(&pdx->io_mutex); - - nArea = cb.nArea; // Retrieve parameters first - uStart = cb.dwOffset; - uSize = cb.dwSize; - cb.dwOffset = 0; // then set default result (nothing) - cb.dwSize = 0; - - if (nArea < MAX_TRANSAREAS) // The area number must be OK - { - TRANSAREA* pArea = &pdx->rTransDef[nArea]; // Pointer to relevant info - spin_lock_irq(&pdx->stagedLock); // Lock others out - - if ((pArea->bUsed) && (pArea->bCircular) && // Must be circular area - (pArea->bCircToHost)) // For now at least must be to host - { - bool bWaiting = false; - - if ((pArea->aBlocks[0].dwSize >= uSize) && // Got anything? - (pArea->aBlocks[0].dwOffset == uStart)) // Must be legal data - { - pArea->aBlocks[0].dwSize -= uSize; - pArea->aBlocks[0].dwOffset += uSize; - if (pArea->aBlocks[0].dwSize == 0) // Have we emptied this block? - { - if (pArea->aBlocks[1].dwSize) // Is there a second block? - { - pArea->aBlocks[0] = pArea->aBlocks[1]; // Copy down block 2 data - pArea->aBlocks[1].dwSize = 0; // and mark the second block as unused - pArea->aBlocks[1].dwOffset = 0; - } - else - pArea->aBlocks[0].dwOffset = 0; - } - - dev_dbg(&pdx->interface->dev, "%s free %d bytes at %d, return %d bytes at %d, wait=%d", - __func__, uSize, uStart, pArea->aBlocks[0].dwSize, pArea->aBlocks[0].dwOffset, pdx->bXFerWaiting); - - // Return the next available block of memory as well - if (pArea->aBlocks[0].dwSize > 0) // Got anything? - { - cb.dwOffset = pArea->aBlocks[0].dwOffset; - cb.dwSize = pArea->aBlocks[0].dwSize; - } - - bWaiting = pdx->bXFerWaiting; - if (bWaiting && pdx->bStagedUrbPending) - { - dev_err(&pdx->interface->dev, "%s ERROR: waiting xfer and staged Urb pending!", __func__); - bWaiting = false; - } - } - else - { - dev_err(&pdx->interface->dev, "%s ERROR: freeing %d bytes at %d, block 0 is %d bytes at %d", - __func__, uSize, uStart, pArea->aBlocks[0].dwSize, pArea->aBlocks[0].dwOffset); - iReturn = U14ERR_NOMEMORY; - } - - // If we have one, kick off pending transfer - if (bWaiting) // Got a block xfer waiting? - { - int RWMStat = ReadWriteMem(pdx, !pdx->rDMAInfo.bOutWard, - pdx->rDMAInfo.wIdent, pdx->rDMAInfo.dwOffset, pdx->rDMAInfo.dwSize); - if (RWMStat != U14ERR_NOERROR) - dev_err(&pdx->interface->dev, "%s rw setup failed %d", __func__, RWMStat); - } - } - else - iReturn = U14ERR_NOTSET; - - spin_unlock_irq(&pdx->stagedLock); - } - else - iReturn = U14ERR_BADAREA; - - copy_to_user(pCB, &cb, sizeof(cb)); - mutex_unlock(&pdx->io_mutex); - return iReturn; + int iReturn = U14ERR_NOERROR; + unsigned int nArea, uStart, uSize; + TCIRCBLOCK cb; + dev_dbg(&pdx->interface->dev, "%s", __func__); + copy_from_user(&cb, pCB, sizeof(cb)); + mutex_lock(&pdx->io_mutex); + + nArea = cb.nArea; // Retrieve parameters first + uStart = cb.dwOffset; + uSize = cb.dwSize; + cb.dwOffset = 0; // then set default result (nothing) + cb.dwSize = 0; + + if (nArea < MAX_TRANSAREAS) // The area number must be OK + { + TRANSAREA *pArea = &pdx->rTransDef[nArea]; // Pointer to relevant info + spin_lock_irq(&pdx->stagedLock); // Lock others out + + if ((pArea->bUsed) && (pArea->bCircular) && // Must be circular area + (pArea->bCircToHost)) // For now at least must be to host + { + bool bWaiting = false; + + if ((pArea->aBlocks[0].dwSize >= uSize) && // Got anything? + (pArea->aBlocks[0].dwOffset == uStart)) // Must be legal data + { + pArea->aBlocks[0].dwSize -= uSize; + pArea->aBlocks[0].dwOffset += uSize; + if (pArea->aBlocks[0].dwSize == 0) // Have we emptied this block? + { + if (pArea->aBlocks[1].dwSize) // Is there a second block? + { + pArea->aBlocks[0] = pArea->aBlocks[1]; // Copy down block 2 data + pArea->aBlocks[1].dwSize = 0; // and mark the second block as unused + pArea->aBlocks[1].dwOffset = 0; + } else + pArea->aBlocks[0].dwOffset = 0; + } + + dev_dbg(&pdx->interface->dev, + "%s free %d bytes at %d, return %d bytes at %d, wait=%d", + __func__, uSize, uStart, + pArea->aBlocks[0].dwSize, + pArea->aBlocks[0].dwOffset, + pdx->bXFerWaiting); + + // Return the next available block of memory as well + if (pArea->aBlocks[0].dwSize > 0) // Got anything? + { + cb.dwOffset = + pArea->aBlocks[0].dwOffset; + cb.dwSize = pArea->aBlocks[0].dwSize; + } + + bWaiting = pdx->bXFerWaiting; + if (bWaiting && pdx->bStagedUrbPending) { + dev_err(&pdx->interface->dev, + "%s ERROR: waiting xfer and staged Urb pending!", + __func__); + bWaiting = false; + } + } else { + dev_err(&pdx->interface->dev, + "%s ERROR: freeing %d bytes at %d, block 0 is %d bytes at %d", + __func__, uSize, uStart, + pArea->aBlocks[0].dwSize, + pArea->aBlocks[0].dwOffset); + iReturn = U14ERR_NOMEMORY; + } + + // If we have one, kick off pending transfer + if (bWaiting) // Got a block xfer waiting? + { + int RWMStat = + ReadWriteMem(pdx, !pdx->rDMAInfo.bOutWard, + pdx->rDMAInfo.wIdent, + pdx->rDMAInfo.dwOffset, + pdx->rDMAInfo.dwSize); + if (RWMStat != U14ERR_NOERROR) + dev_err(&pdx->interface->dev, + "%s rw setup failed %d", + __func__, RWMStat); + } + } else + iReturn = U14ERR_NOTSET; + + spin_unlock_irq(&pdx->stagedLock); + } else + iReturn = U14ERR_BADAREA; + + copy_to_user(pCB, &cb, sizeof(cb)); + mutex_unlock(&pdx->io_mutex); + return iReturn; } - - - |
