static ssize_t mwave_read(struct file *file, char __user *buf, size_t count,
loff_t * ppos)
{
PRINTK_5(TRACE_MWAVE,
"mwavedd::mwave_read entry file %p, buf %p, count %zx ppos %p\n",
file, buf, count, ppos);
return -EINVAL;
}
static ssize_t mwave_write(struct file *file, const char *buf,
size_t count, loff_t * ppos)
{
PRINTK_5(TRACE_MWAVE,
"mwavedd::mwave_write entry file %p, buf %p, count %x ppos %p\n",
file, buf, count, ppos);
return -EINVAL;
}
int dsp3780I_WriteIStore(unsigned short usDspBaseIO, void __user *pvBuffer,
unsigned uCount, unsigned long ulDSPAddr)
{
unsigned long flags;
unsigned short __user *pusBuffer = pvBuffer;
PRINTK_5(TRACE_3780I,
"3780i::dsp3780I_WriteIStore entry usDspBaseIO %x, pusBuffer %p, uCount %x, ulDSPAddr %lx\n",
usDspBaseIO, pusBuffer, uCount, ulDSPAddr);
/*
* Set the initial MSA address. To convert from an instruction store
* address to an MSA address
* shift the address two bits to the left and set bit 22
*/
ulDSPAddr = (ulDSPAddr << 2) | (1 << 22);
spin_lock_irqsave(&dsp_lock, flags);
OutWordDsp(DSP_MsaAddrLow, (unsigned short) ulDSPAddr);
OutWordDsp(DSP_MsaAddrHigh, (unsigned short) (ulDSPAddr >> 16));
spin_unlock_irqrestore(&dsp_lock, flags);
/* Transfer the memory block */
while (uCount-- != 0) {
unsigned short val_lo, val_hi;
if(get_user(val_lo, pusBuffer++))
return -EFAULT;
if(get_user(val_hi, pusBuffer++))
return -EFAULT;
spin_lock_irqsave(&dsp_lock, flags);
OutWordDsp(DSP_MsaDataISLow, val_lo);
OutWordDsp(DSP_MsaDataDSISHigh, val_hi);
spin_unlock_irqrestore(&dsp_lock, flags);
PRINTK_4(TRACE_3780I,
"3780I::dsp3780I_WriteIStore uCount %x val_lo %x val_hi %x\n",
uCount, val_lo, val_hi);
PaceMsaAccess(usDspBaseIO);
}
PRINTK_1(TRACE_3780I,
"3780I::dsp3780I_WriteIStore exit bRC=TRUE\n");
return 0;
}
int dsp3780I_WriteIStore(unsigned short usDspBaseIO, void __user *pvBuffer,
unsigned uCount, unsigned long ulDSPAddr)
{
unsigned long flags;
unsigned short __user *pusBuffer = pvBuffer;
PRINTK_5(TRACE_3780I,
"3780i::dsp3780I_WriteIStore entry usDspBaseIO %x, pusBuffer %p, uCount %x, ulDSPAddr %lx\n",
usDspBaseIO, pusBuffer, uCount, ulDSPAddr);
ulDSPAddr = (ulDSPAddr << 2) | (1 << 22);
spin_lock_irqsave(&dsp_lock, flags);
OutWordDsp(DSP_MsaAddrLow, (unsigned short) ulDSPAddr);
OutWordDsp(DSP_MsaAddrHigh, (unsigned short) (ulDSPAddr >> 16));
spin_unlock_irqrestore(&dsp_lock, flags);
while (uCount-- != 0) {
unsigned short val_lo, val_hi;
if(get_user(val_lo, pusBuffer++))
return -EFAULT;
if(get_user(val_hi, pusBuffer++))
return -EFAULT;
spin_lock_irqsave(&dsp_lock, flags);
OutWordDsp(DSP_MsaDataISLow, val_lo);
OutWordDsp(DSP_MsaDataDSISHigh, val_hi);
spin_unlock_irqrestore(&dsp_lock, flags);
PRINTK_4(TRACE_3780I,
"3780I::dsp3780I_WriteIStore uCount %x val_lo %x val_hi %x\n",
uCount, val_lo, val_hi);
PaceMsaAccess(usDspBaseIO);
}
PRINTK_1(TRACE_3780I,
"3780I::dsp3780I_WriteIStore exit bRC=TRUE\n");
return 0;
}
int dsp3780I_ReadAndClearDStore(unsigned short usDspBaseIO,
void __user *pvBuffer, unsigned uCount,
unsigned long ulDSPAddr)
{
unsigned long flags;
unsigned short __user *pusBuffer = pvBuffer;
unsigned short val;
PRINTK_5(TRACE_3780I,
"3780i::dsp3780I_ReadAndDStore entry usDspBaseIO %x, pusBuffer %p, uCount %x, ulDSPAddr %lx\n",
usDspBaseIO, pusBuffer, uCount, ulDSPAddr);
/* Set the initial MSA address. No adjustments need to be made to data store addresses */
spin_lock_irqsave(&dsp_lock, flags);
OutWordDsp(DSP_MsaAddrLow, (unsigned short) ulDSPAddr);
OutWordDsp(DSP_MsaAddrHigh, (unsigned short) (ulDSPAddr >> 16));
spin_unlock_irqrestore(&dsp_lock, flags);
/* Transfer the memory block */
while (uCount-- != 0) {
spin_lock_irqsave(&dsp_lock, flags);
val = InWordDsp(DSP_ReadAndClear);
spin_unlock_irqrestore(&dsp_lock, flags);
if(put_user(val, pusBuffer++))
return -EFAULT;
PRINTK_3(TRACE_3780I,
"3780I::dsp3780I_ReadAndCleanDStore uCount %x val %x\n",
uCount, val);
PaceMsaAccess(usDspBaseIO);
}
PRINTK_1(TRACE_3780I,
"3780I::dsp3780I_ReadAndClearDStore exit bRC=TRUE\n");
return 0;
}
int dsp3780I_ReadDStore(unsigned short usDspBaseIO, void __user *pvBuffer,
unsigned uCount, unsigned long ulDSPAddr)
{
unsigned long flags;
unsigned short __user *pusBuffer = pvBuffer;
unsigned short val;
PRINTK_5(TRACE_3780I,
"3780i::dsp3780I_ReadDStore entry usDspBaseIO %x, pusBuffer %p, uCount %x, ulDSPAddr %lx\n",
usDspBaseIO, pusBuffer, uCount, ulDSPAddr);
spin_lock_irqsave(&dsp_lock, flags);
OutWordDsp(DSP_MsaAddrLow, (unsigned short) ulDSPAddr);
OutWordDsp(DSP_MsaAddrHigh, (unsigned short) (ulDSPAddr >> 16));
spin_unlock_irqrestore(&dsp_lock, flags);
while (uCount-- != 0) {
spin_lock_irqsave(&dsp_lock, flags);
val = InWordDsp(DSP_MsaDataDSISHigh);
spin_unlock_irqrestore(&dsp_lock, flags);
if(put_user(val, pusBuffer++))
return -EFAULT;
PRINTK_3(TRACE_3780I,
"3780I::dsp3780I_ReadDStore uCount %x val %x\n",
uCount, val);
PaceMsaAccess(usDspBaseIO);
}
PRINTK_1(TRACE_3780I,
"3780I::dsp3780I_ReadDStore exit bRC=TRUE\n");
return 0;
}
static int mwave_ioctl(struct inode *inode, struct file *file,
unsigned int iocmd, unsigned long ioarg)
{
unsigned int retval = 0;
pMWAVE_DEVICE_DATA pDrvData = &mwave_s_mdd;
PRINTK_5(TRACE_MWAVE,
"mwavedd::mwave_ioctl, entry inode %x file %x cmd %x arg %x\n",
(int) inode, (int) file, iocmd, (int) ioarg);
switch (iocmd) {
case IOCTL_MW_RESET:
PRINTK_1(TRACE_MWAVE,
"mwavedd::mwave_ioctl, IOCTL_MW_RESET calling tp3780I_ResetDSP\n");
retval = tp3780I_ResetDSP(&pDrvData->rBDData);
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_ioctl, IOCTL_MW_RESET retval %x from tp3780I_ResetDSP\n",
retval);
break;
case IOCTL_MW_RUN:
PRINTK_1(TRACE_MWAVE,
"mwavedd::mwave_ioctl, IOCTL_MW_RUN calling tp3780I_StartDSP\n");
retval = tp3780I_StartDSP(&pDrvData->rBDData);
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_ioctl, IOCTL_MW_RUN retval %x from tp3780I_StartDSP\n",
retval);
break;
case IOCTL_MW_DSP_ABILITIES: {
MW_ABILITIES rAbilities;
PRINTK_1(TRACE_MWAVE,
"mwavedd::mwave_ioctl, IOCTL_MW_DSP_ABILITIES calling tp3780I_QueryAbilities\n");
retval = tp3780I_QueryAbilities(&pDrvData->rBDData, &rAbilities);
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_ioctl, IOCTL_MW_DSP_ABILITIES retval %x from tp3780I_QueryAbilities\n",
retval);
if (retval == 0) {
if( copy_to_user((char *) ioarg, (char *) &rAbilities, sizeof(MW_ABILITIES)) )
return -EFAULT;
}
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_ioctl, IOCTL_MW_DSP_ABILITIES exit retval %x\n",
retval);
}
break;
case IOCTL_MW_READ_DATA:
case IOCTL_MW_READCLEAR_DATA: {
MW_READWRITE rReadData;
unsigned short *pusBuffer = 0;
if( copy_from_user((char *) &rReadData, (char *) ioarg, sizeof(MW_READWRITE)) )
return -EFAULT;
pusBuffer = (unsigned short *) (rReadData.pBuf);
PRINTK_4(TRACE_MWAVE,
"mwavedd::mwave_ioctl IOCTL_MW_READ_DATA, size %lx, ioarg %lx pusBuffer %p\n",
rReadData.ulDataLength, ioarg, pusBuffer);
retval = tp3780I_ReadWriteDspDStore(&pDrvData->rBDData, iocmd,
(void *) pusBuffer, rReadData.ulDataLength, rReadData.usDspAddress);
}
break;
case IOCTL_MW_READ_INST: {
MW_READWRITE rReadData;
unsigned short *pusBuffer = 0;
if( copy_from_user((char *) &rReadData, (char *) ioarg, sizeof(MW_READWRITE)) )
return -EFAULT;
pusBuffer = (unsigned short *) (rReadData.pBuf);
PRINTK_4(TRACE_MWAVE,
"mwavedd::mwave_ioctl IOCTL_MW_READ_INST, size %lx, ioarg %lx pusBuffer %p\n",
rReadData.ulDataLength / 2, ioarg,
pusBuffer);
retval = tp3780I_ReadWriteDspDStore(&pDrvData->rBDData,
iocmd, pusBuffer,
rReadData.ulDataLength / 2,
rReadData.usDspAddress);
}
break;
case IOCTL_MW_WRITE_DATA: {
MW_READWRITE rWriteData;
unsigned short *pusBuffer = 0;
if( copy_from_user((char *) &rWriteData, (char *) ioarg, sizeof(MW_READWRITE)) )
return -EFAULT;
pusBuffer = (unsigned short *) (rWriteData.pBuf);
PRINTK_4(TRACE_MWAVE,
"mwavedd::mwave_ioctl IOCTL_MW_WRITE_DATA, size %lx, ioarg %lx pusBuffer %p\n",
rWriteData.ulDataLength, ioarg,
pusBuffer);
retval = tp3780I_ReadWriteDspDStore(&pDrvData->rBDData, iocmd,
pusBuffer, rWriteData.ulDataLength, rWriteData.usDspAddress);
}
break;
case IOCTL_MW_WRITE_INST: {
MW_READWRITE rWriteData;
unsigned short *pusBuffer = 0;
if( copy_from_user((char *) &rWriteData, (char *) ioarg, sizeof(MW_READWRITE)) )
return -EFAULT;
pusBuffer = (unsigned short *) (rWriteData.pBuf);
PRINTK_4(TRACE_MWAVE,
"mwavedd::mwave_ioctl IOCTL_MW_WRITE_INST, size %lx, ioarg %lx pusBuffer %p\n",
rWriteData.ulDataLength, ioarg,
pusBuffer);
retval = tp3780I_ReadWriteDspIStore(&pDrvData->rBDData, iocmd,
pusBuffer, rWriteData.ulDataLength, rWriteData.usDspAddress);
}
break;
case IOCTL_MW_REGISTER_IPC: {
unsigned int ipcnum = (unsigned int) ioarg;
PRINTK_3(TRACE_MWAVE,
"mwavedd::mwave_ioctl IOCTL_MW_REGISTER_IPC ipcnum %x entry usIntCount %x\n",
ipcnum,
pDrvData->IPCs[ipcnum].usIntCount);
if (ipcnum > 16) {
PRINTK_ERROR(KERN_ERR_MWAVE "mwavedd::mwave_ioctl: IOCTL_MW_REGISTER_IPC: Error: Invalid ipcnum %x\n", ipcnum);
return -EINVAL;
}
pDrvData->IPCs[ipcnum].bIsHere = FALSE;
pDrvData->IPCs[ipcnum].bIsEnabled = TRUE;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
#else
current->priority = 0x28; /* boost to provide priority timing */
#endif
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_ioctl IOCTL_MW_REGISTER_IPC ipcnum %x exit\n",
ipcnum);
}
break;
case IOCTL_MW_GET_IPC: {
unsigned int ipcnum = (unsigned int) ioarg;
spinlock_t ipc_lock = SPIN_LOCK_UNLOCKED;
unsigned long flags;
PRINTK_3(TRACE_MWAVE,
"mwavedd::mwave_ioctl IOCTL_MW_GET_IPC ipcnum %x, usIntCount %x\n",
ipcnum,
pDrvData->IPCs[ipcnum].usIntCount);
if (ipcnum > 16) {
PRINTK_ERROR(KERN_ERR_MWAVE "mwavedd::mwave_ioctl: IOCTL_MW_GET_IPC: Error: Invalid ipcnum %x\n", ipcnum);
return -EINVAL;
}
if (pDrvData->IPCs[ipcnum].bIsEnabled == TRUE) {
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_ioctl, thread for ipc %x going to sleep\n",
ipcnum);
spin_lock_irqsave(&ipc_lock, flags);
/* check whether an event was signalled by */
/* the interrupt handler while we were gone */
if (pDrvData->IPCs[ipcnum].usIntCount == 1) { /* first int has occurred (race condition) */
pDrvData->IPCs[ipcnum].usIntCount = 2; /* first int has been handled */
spin_unlock_irqrestore(&ipc_lock, flags);
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_ioctl IOCTL_MW_GET_IPC ipcnum %x handling first int\n",
ipcnum);
} else { /* either 1st int has not yet occurred, or we have already handled the first int */
pDrvData->IPCs[ipcnum].bIsHere = TRUE;
interruptible_sleep_on(&pDrvData->IPCs[ipcnum].ipc_wait_queue);
pDrvData->IPCs[ipcnum].bIsHere = FALSE;
if (pDrvData->IPCs[ipcnum].usIntCount == 1) {
pDrvData->IPCs[ipcnum].
usIntCount = 2;
}
spin_unlock_irqrestore(&ipc_lock, flags);
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_ioctl IOCTL_MW_GET_IPC ipcnum %x woke up and returning to application\n",
ipcnum);
}
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_ioctl IOCTL_MW_GET_IPC, returning thread for ipc %x processing\n",
ipcnum);
}
}
break;
case IOCTL_MW_UNREGISTER_IPC: {
unsigned int ipcnum = (unsigned int) ioarg;
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_ioctl IOCTL_MW_UNREGISTER_IPC ipcnum %x\n",
ipcnum);
if (ipcnum > 16) {
PRINTK_ERROR(KERN_ERR_MWAVE "mwavedd::mwave_ioctl: IOCTL_MW_UNREGISTER_IPC: Error: Invalid ipcnum %x\n", ipcnum);
return -EINVAL;
}
if (pDrvData->IPCs[ipcnum].bIsEnabled == TRUE) {
pDrvData->IPCs[ipcnum].bIsEnabled = FALSE;
if (pDrvData->IPCs[ipcnum].bIsHere == TRUE) {
wake_up_interruptible(&pDrvData->IPCs[ipcnum].ipc_wait_queue);
}
}
}
break;
default:
PRINTK_ERROR(KERN_ERR_MWAVE "mwavedd::mwave_ioctl: Error: Unrecognized iocmd %x\n", iocmd);
return -ENOTTY;
break;
} /* switch */
PRINTK_2(TRACE_MWAVE, "mwavedd::mwave_ioctl, exit retval %x\n", retval);
return retval;
}
static int mwave_ioctl(struct inode *inode, struct file *file,
unsigned int iocmd, unsigned long ioarg)
{
unsigned int retval = 0;
pMWAVE_DEVICE_DATA pDrvData = &mwave_s_mdd;
void __user *arg = (void __user *)ioarg;
PRINTK_5(TRACE_MWAVE,
"mwavedd::mwave_ioctl, entry inode %p file %p cmd %x arg %x\n",
inode, file, iocmd, (int) ioarg);
switch (iocmd) {
case IOCTL_MW_RESET:
PRINTK_1(TRACE_MWAVE,
"mwavedd::mwave_ioctl, IOCTL_MW_RESET"
" calling tp3780I_ResetDSP\n");
retval = tp3780I_ResetDSP(&pDrvData->rBDData);
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_ioctl, IOCTL_MW_RESET"
" retval %x from tp3780I_ResetDSP\n",
retval);
break;
case IOCTL_MW_RUN:
PRINTK_1(TRACE_MWAVE,
"mwavedd::mwave_ioctl, IOCTL_MW_RUN"
" calling tp3780I_StartDSP\n");
retval = tp3780I_StartDSP(&pDrvData->rBDData);
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_ioctl, IOCTL_MW_RUN"
" retval %x from tp3780I_StartDSP\n",
retval);
break;
case IOCTL_MW_DSP_ABILITIES: {
MW_ABILITIES rAbilities;
PRINTK_1(TRACE_MWAVE,
"mwavedd::mwave_ioctl,"
" IOCTL_MW_DSP_ABILITIES calling"
" tp3780I_QueryAbilities\n");
retval = tp3780I_QueryAbilities(&pDrvData->rBDData,
&rAbilities);
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_ioctl, IOCTL_MW_DSP_ABILITIES"
" retval %x from tp3780I_QueryAbilities\n",
retval);
if (retval == 0) {
if( copy_to_user(arg, &rAbilities,
sizeof(MW_ABILITIES)) )
return -EFAULT;
}
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_ioctl, IOCTL_MW_DSP_ABILITIES"
" exit retval %x\n",
retval);
}
break;
case IOCTL_MW_READ_DATA:
case IOCTL_MW_READCLEAR_DATA: {
MW_READWRITE rReadData;
unsigned short __user *pusBuffer = NULL;
if( copy_from_user(&rReadData, arg,
sizeof(MW_READWRITE)) )
return -EFAULT;
pusBuffer = (unsigned short __user *) (rReadData.pBuf);
PRINTK_4(TRACE_MWAVE,
"mwavedd::mwave_ioctl IOCTL_MW_READ_DATA,"
" size %lx, ioarg %lx pusBuffer %p\n",
rReadData.ulDataLength, ioarg, pusBuffer);
retval = tp3780I_ReadWriteDspDStore(&pDrvData->rBDData,
iocmd,
pusBuffer,
rReadData.ulDataLength,
rReadData.usDspAddress);
}
break;
case IOCTL_MW_READ_INST: {
MW_READWRITE rReadData;
unsigned short __user *pusBuffer = NULL;
if( copy_from_user(&rReadData, arg,
sizeof(MW_READWRITE)) )
return -EFAULT;
pusBuffer = (unsigned short __user *) (rReadData.pBuf);
PRINTK_4(TRACE_MWAVE,
"mwavedd::mwave_ioctl IOCTL_MW_READ_INST,"
" size %lx, ioarg %lx pusBuffer %p\n",
rReadData.ulDataLength / 2, ioarg,
pusBuffer);
retval = tp3780I_ReadWriteDspDStore(&pDrvData->rBDData,
iocmd, pusBuffer,
rReadData.ulDataLength / 2,
rReadData.usDspAddress);
}
break;
case IOCTL_MW_WRITE_DATA: {
MW_READWRITE rWriteData;
unsigned short __user *pusBuffer = NULL;
if( copy_from_user(&rWriteData, arg,
sizeof(MW_READWRITE)) )
return -EFAULT;
pusBuffer = (unsigned short __user *) (rWriteData.pBuf);
PRINTK_4(TRACE_MWAVE,
"mwavedd::mwave_ioctl IOCTL_MW_WRITE_DATA,"
" size %lx, ioarg %lx pusBuffer %p\n",
rWriteData.ulDataLength, ioarg,
pusBuffer);
retval = tp3780I_ReadWriteDspDStore(&pDrvData->rBDData,
iocmd, pusBuffer,
rWriteData.ulDataLength,
rWriteData.usDspAddress);
}
break;
case IOCTL_MW_WRITE_INST: {
MW_READWRITE rWriteData;
unsigned short __user *pusBuffer = NULL;
if( copy_from_user(&rWriteData, arg,
sizeof(MW_READWRITE)) )
return -EFAULT;
pusBuffer = (unsigned short __user *)(rWriteData.pBuf);
PRINTK_4(TRACE_MWAVE,
"mwavedd::mwave_ioctl IOCTL_MW_WRITE_INST,"
" size %lx, ioarg %lx pusBuffer %p\n",
rWriteData.ulDataLength, ioarg,
pusBuffer);
retval = tp3780I_ReadWriteDspIStore(&pDrvData->rBDData,
iocmd, pusBuffer,
rWriteData.ulDataLength,
rWriteData.usDspAddress);
}
break;
case IOCTL_MW_REGISTER_IPC: {
unsigned int ipcnum = (unsigned int) ioarg;
PRINTK_3(TRACE_MWAVE,
"mwavedd::mwave_ioctl IOCTL_MW_REGISTER_IPC"
" ipcnum %x entry usIntCount %x\n",
ipcnum,
pDrvData->IPCs[ipcnum].usIntCount);
if (ipcnum >= ARRAY_SIZE(pDrvData->IPCs)) {
PRINTK_ERROR(KERN_ERR_MWAVE
"mwavedd::mwave_ioctl:"
" IOCTL_MW_REGISTER_IPC:"
" Error: Invalid ipcnum %x\n",
ipcnum);
return -EINVAL;
}
pDrvData->IPCs[ipcnum].bIsHere = FALSE;
pDrvData->IPCs[ipcnum].bIsEnabled = TRUE;
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_ioctl IOCTL_MW_REGISTER_IPC"
" ipcnum %x exit\n",
ipcnum);
}
break;
case IOCTL_MW_GET_IPC: {
unsigned int ipcnum = (unsigned int) ioarg;
PRINTK_3(TRACE_MWAVE,
"mwavedd::mwave_ioctl IOCTL_MW_GET_IPC"
" ipcnum %x, usIntCount %x\n",
ipcnum,
pDrvData->IPCs[ipcnum].usIntCount);
if (ipcnum >= ARRAY_SIZE(pDrvData->IPCs)) {
PRINTK_ERROR(KERN_ERR_MWAVE
"mwavedd::mwave_ioctl:"
" IOCTL_MW_GET_IPC: Error:"
" Invalid ipcnum %x\n", ipcnum);
return -EINVAL;
}
if (pDrvData->IPCs[ipcnum].bIsEnabled == TRUE) {
DECLARE_WAITQUEUE(wait, current);
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_ioctl, thread for"
" ipc %x going to sleep\n",
ipcnum);
add_wait_queue(&pDrvData->IPCs[ipcnum].ipc_wait_queue, &wait);
pDrvData->IPCs[ipcnum].bIsHere = TRUE;
set_current_state(TASK_INTERRUPTIBLE);
/* check whether an event was signalled by */
/* the interrupt handler while we were gone */
if (pDrvData->IPCs[ipcnum].usIntCount == 1) { /* first int has occurred (race condition) */
pDrvData->IPCs[ipcnum].usIntCount = 2; /* first int has been handled */
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_ioctl"
" IOCTL_MW_GET_IPC ipcnum %x"
" handling first int\n",
ipcnum);
} else { /* either 1st int has not yet occurred, or we have already handled the first int */
schedule();
if (pDrvData->IPCs[ipcnum].usIntCount == 1) {
pDrvData->IPCs[ipcnum].usIntCount = 2;
}
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_ioctl"
" IOCTL_MW_GET_IPC ipcnum %x"
" woke up and returning to"
" application\n",
ipcnum);
}
pDrvData->IPCs[ipcnum].bIsHere = FALSE;
remove_wait_queue(&pDrvData->IPCs[ipcnum].ipc_wait_queue, &wait);
set_current_state(TASK_RUNNING);
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_ioctl IOCTL_MW_GET_IPC,"
" returning thread for ipc %x"
" processing\n",
ipcnum);
}
}
break;
case IOCTL_MW_UNREGISTER_IPC: {
unsigned int ipcnum = (unsigned int) ioarg;
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_ioctl IOCTL_MW_UNREGISTER_IPC"
" ipcnum %x\n",
ipcnum);
if (ipcnum >= ARRAY_SIZE(pDrvData->IPCs)) {
PRINTK_ERROR(KERN_ERR_MWAVE
"mwavedd::mwave_ioctl:"
" IOCTL_MW_UNREGISTER_IPC:"
" Error: Invalid ipcnum %x\n",
ipcnum);
return -EINVAL;
}
if (pDrvData->IPCs[ipcnum].bIsEnabled == TRUE) {
pDrvData->IPCs[ipcnum].bIsEnabled = FALSE;
if (pDrvData->IPCs[ipcnum].bIsHere == TRUE) {
wake_up_interruptible(&pDrvData->IPCs[ipcnum].ipc_wait_queue);
}
}
}
break;
default:
PRINTK_ERROR(KERN_ERR_MWAVE "mwavedd::mwave_ioctl:"
" Error: Unrecognized iocmd %x\n",
iocmd);
return -ENOTTY;
break;
} /* switch */
PRINTK_2(TRACE_MWAVE, "mwavedd::mwave_ioctl, exit retval %x\n", retval);
return retval;
}