/** * @brief Set channel is masked * * When channel is masked, the GDMA transaction will stop. * When GDMA controller comes back from another channel (chain feature) * * >> Channel Mask=0: It's strange, and turns on related bit in GDMA interrupt * status register (16:23 Unmasked) * * >> Channel Mask=1: It'll start GDMA transation, and clear this bit. * * @param ChNum GDMA channel number * @retval 1 success * @retval 0 fail */ int GdmaMaskChannel(uint32_t ChNum) { uint32_t Data=0; Data=GDMA_READ_REG(GDMA_CTRL_REG1(ChNum)); Data |= ( 0x01 << CH_MASK_OFFSET); GDMA_WRITE_REG(GDMA_CTRL_REG1(ChNum), Data); GDMA_PRINT("%s: Write %0X to %X\n", __FUNCTION__, Data, GDMA_CTRL_REG1(ChNum)); return 1; }
/** * @brief GDMA interrupt handler * * When GDMA transcation is done, call related handler * to do the remain job. * */ irqreturn_t GdmaIrqHandler( int irq, void *irqaction ) { u32 Ch=0; u32 flags; u32 GdmaStatus=GDMA_READ_REG(RALINK_GDMAISTS); GDMA_PRINT("Rcv Gdma Interrupt=%x\n",GdmaStatus); spin_lock_irqsave(&gdma_int_lock, flags); //UnMask error for(Ch=0;Ch<MAX_GDMA_CHANNEL;Ch++) { if(GdmaStatus & (0x1 << (Ch+UMASK_INT_STATUS_OFFSET)) ) { if(GdmaUnMaskIntCallback[Ch] != NULL) { //write 1 clear GDMA_WRITE_REG(RALINK_GDMAISTS, 1<< (Ch + UMASK_INT_STATUS_OFFSET)); GdmaUnMaskIntCallback[Ch](Ch); } } } //processing done for(Ch=0;Ch<MAX_GDMA_CHANNEL;Ch++) { if(GdmaStatus & (0x1<<Ch)) { if(GdmaTxDoneCallback[Ch] != NULL) { //write 1 clear GDMA_WRITE_REG(RALINK_GDMAISTS, 1<< (Ch + TX_DONE_INT_STATUS_OFFSET)); GdmaTxDoneCallback[Ch](Ch); } } } spin_unlock_irqrestore(&gdma_int_lock, flags); return IRQ_HANDLED; }
/** * @brief Get free GDMA channel * * @param ChNum GDMA channel number * @retval 1 channel is available * @retval 0 channels are all busy */ int _GdmaGetFreeCh(uint32_t *ChNum) { unsigned long flags; uint32_t Data=0; uint32_t Ch=0; #if defined (CONFIG_GDMA_DEBUG) static uint32_t Ch_RR=0; #endif spin_lock_irqsave(&gdma_lock, flags); #if defined (CONFIG_GDMA_PCM_ONLY) #if defined (CONFIG_RALINK_RT3883) || defined (CONFIG_RALINK_RT3352) || defined (CONFIG_RALINK_RT5350) for(Ch=8; Ch<MAX_GDMA_CHANNEL;Ch++) //channel 8~max_channel #else for(Ch=MAX_GDMA_CHANNEL; Ch<MAX_GDMA_CHANNEL;Ch++) //no free channel #endif #elif defined (CONFIG_GDMA_PCM_I2S_OTHERS) #if defined (CONFIG_RALINK_RT3883) || defined (CONFIG_RALINK_RT3352) || defined (CONFIG_RALINK_RT5350) for(Ch=8; Ch<MAX_GDMA_CHANNEL;Ch++) //channel 8~max_channel #else for(Ch=6; Ch<MAX_GDMA_CHANNEL;Ch++) //channel 6~max_channel #endif #elif defined (CONFIG_GDMA_EVERYBODY) for(Ch=0; Ch<MAX_GDMA_CHANNEL;Ch++) //all channel #elif defined (CONFIG_GDMA_DEBUG) for(Ch=(Ch_RR++)%MAX_GDMA_CHANNEL; Ch<MAX_GDMA_CHANNEL;Ch++) //round robin #endif { Data=GDMA_READ_REG(GDMA_CTRL_REG(Ch)); /* hardware will reset this bit if transaction is done. * It means channel is free */ if((Data & (0x01<<CH_EBL_OFFSET))==0) { *ChNum = Ch; spin_unlock_irqrestore(&gdma_lock, flags); return 1; //Channel is free } } spin_unlock_irqrestore(&gdma_lock, flags); return 0; // Channels are all busy }
int _nand_dma_sync(void) { //unmask to start dma unsigned long data; int retry = 1000000; //fixme data = GDMA_READ_REG(GDMA_CTRL_REG1(DMA_CHNUM)); data &= ~( 0x01 << CH_MASK_OFFSET); GDMA_WRITE_REG(GDMA_CTRL_REG1(DMA_CHNUM), data); #if 0 #if defined (CONFIG_RALINK_RT3052) // sync status while(!(GDMA_READ_REG(RALINK_GDMAISTS) & (1<<DMA_CHNUM)) && retry--) { ndelay(1); // do nothing } if (!(GDMA_READ_REG(RALINK_GDMAISTS) & (1<<DMA_CHNUM))) { return -1; } GDMA_WRITE_REG(RALINK_GDMAISTS, 1<<DMA_CHNUM); #elif defined (CONFIG_RALINK_RT3883) || defined (CONFIG_RALINK_RT3352) while(!(GDMA_READ_REG(RALINK_GDMA_DONEINT) & (1<<DMA_CHNUM)) && retry--) { ndelay(1); } if (!(GDMA_READ_REG(RALINK_GDMA_DONEINT) & (1<<DMA_CHNUM))) { return -1; } GDMA_WRITE_REG(RALINK_GDMA_DONEINT, 1<<DMA_CHNUM); #endif #endif // frank added while(!(GDMA_READ_REG(RALINK_GDMA_DONEINT) & (1<<DMA_CHNUM)) && retry--) { ndelay(1); } if (!(GDMA_READ_REG(RALINK_GDMA_DONEINT) & (1<<DMA_CHNUM))) { return -1; } GDMA_WRITE_REG(RALINK_GDMA_DONEINT, 1<<DMA_CHNUM); return 0; }
/** * @brief GDMA interrupt handler * * When GDMA transcation is done, call related handler * to do the remain job. * */ irqreturn_t GdmaIrqHandler( int irq, void *irqaction ) { u32 Ch=0; unsigned long flags; #if defined (CONFIG_RALINK_RT3052) u32 GdmaUnMaskStatus=GDMA_READ_REG(RALINK_GDMAISTS) & 0xFF0000; u32 GdmaDoneStatus=GDMA_READ_REG(RALINK_GDMAISTS) & 0xFF; #elif defined (CONFIG_RALINK_RT3883) || defined (CONFIG_RALINK_RT3352) || defined (CONFIG_RALINK_RT5350) u32 GdmaUnMaskStatus=GDMA_READ_REG(RALINK_GDMA_UNMASKINT); u32 GdmaDoneStatus=GDMA_READ_REG(RALINK_GDMA_DONEINT); #endif //GDMA_PRINT("========================================\n"); //GDMA_PRINT("GdmaUnMask Interrupt=%x\n",GdmaUnMaskStatus); //GDMA_PRINT("GdmaDone Interrupt=%x\n",GdmaDoneStatus); //GDMA_PRINT("========================================\n"); spin_lock_irqsave(&gdma_int_lock, flags); //UnMask error for(Ch=0;Ch<MAX_GDMA_CHANNEL;Ch++) { if(GdmaUnMaskStatus & (0x1 << (UNMASK_INT_STATUS(Ch))) ) { if(GdmaUnMaskIntCallback[Ch] != NULL) { GdmaUnMaskIntCallback[Ch](Ch); } } } //write 1 clear #if defined (CONFIG_RALINK_RT3052) GDMA_WRITE_REG(RALINK_GDMAISTS, GdmaUnMaskStatus); #elif defined (CONFIG_RALINK_RT3883) || defined (CONFIG_RALINK_RT3352) || defined (CONFIG_RALINK_RT5350) GDMA_WRITE_REG(RALINK_GDMA_UNMASKINT, GdmaUnMaskStatus); #endif //processing done for(Ch=0;Ch<MAX_GDMA_CHANNEL;Ch++) { if(GdmaDoneStatus & (0x1<<Ch)) { if(GdmaDoneIntCallback[Ch] != NULL) { GdmaDoneIntCallback[Ch](Ch); } } } //write 1 clear #if defined (CONFIG_RALINK_RT3052) GDMA_WRITE_REG(RALINK_GDMAISTS, GdmaDoneStatus); #elif defined (CONFIG_RALINK_RT3883) || defined (CONFIG_RALINK_RT3352) || defined (CONFIG_RALINK_RT5350) GDMA_WRITE_REG(RALINK_GDMA_DONEINT, GdmaDoneStatus); #endif spin_unlock_irqrestore(&gdma_int_lock, flags); return IRQ_HANDLED; }
int _GdmaReqEntryIns(GdmaReqEntry *NewEntry) { uint32_t Data=0; GDMA_PRINT("== << GDMA Control Reg (Channel=%d) >> ===\n", NewEntry->ChNum); GDMA_PRINT(" Channel Source Addr = %x \n", NewEntry->Src); GDMA_PRINT(" Channel Dest Addr = %x \n", NewEntry->Dst); GDMA_PRINT(" Transfer Count=%d\n", NewEntry->TransCount); GDMA_PRINT(" Source DMA Req= DMA_REQ%d\n", NewEntry->SrcReqNum); GDMA_PRINT(" Dest DMA Req= DMA_REQ%d\n", NewEntry->DstReqNum); GDMA_PRINT(" Source Burst Mode=%s\n", NewEntry->SrcBurstMode ? "Fix" : "Inc"); GDMA_PRINT(" Dest Burst Mode=%s\n", NewEntry->DstBurstMode ? "Fix" : "Inc"); GDMA_PRINT(" Burst Size=%s\n", NewEntry->BurstSize ==0 ? "1 transfer" : \ NewEntry->BurstSize ==1 ? "2 transfer" :\ NewEntry->BurstSize ==2 ? "4 transfer" :\ NewEntry->BurstSize ==3 ? "8 transfer" :\ NewEntry->BurstSize ==4 ? "16 transfer" :\ "Error"); GDMA_PRINT(" Hardware/Software Mode = %s\n", NewEntry->SoftMode ? "Soft" : "Hw"); GDMA_PRINT("== << GDMA Control Reg1 (Channel=%d) >> =\n", NewEntry->ChNum); GDMA_PRINT("Channel Done Interrput=%s\n", (NewEntry->DoneIntCallback!=NULL) ? "Enable" : "Disable"); GDMA_PRINT("Channel Unmasked Int=%s\n", (NewEntry->UnMaskIntCallback!=NULL) ? "Enable" : "Disable"); #if !defined (CONFIG_RALINK_RT3052) && !defined (CONFIG_RALINK_RT3883) GDMA_PRINT("Coherent Interrupt =%s\n", (NewEntry->CoherentIntEbl==1)? "Enable" : "Disable"); #endif GDMA_PRINT("Next Unmasked Channel=%d\n", NewEntry->NextUnMaskCh); GDMA_PRINT("Channel Mask=%d\n", NewEntry->ChMask); GDMA_PRINT("========================================\n"); GDMA_WRITE_REG(GDMA_SRC_REG(NewEntry->ChNum), NewEntry->Src); GDMA_PRINT("SrcAddr: Write %0X to %X\n", \ NewEntry->Src, GDMA_SRC_REG(NewEntry->ChNum)); GDMA_WRITE_REG(GDMA_DST_REG(NewEntry->ChNum), NewEntry->Dst); GDMA_PRINT("DstAddr: Write %0X to %X\n", \ NewEntry->Dst, GDMA_DST_REG(NewEntry->ChNum)); Data |= ( (NewEntry->NextUnMaskCh) << NEXT_UNMASK_CH_OFFSET); Data |= ( NewEntry->ChMask << CH_MASK_OFFSET); #if !defined (CONFIG_RALINK_RT3052) && !defined (CONFIG_RALINK_RT3883) Data |= ( NewEntry->CoherentIntEbl << COHERENT_INT_EBL_OFFSET); #endif if(NewEntry->UnMaskIntCallback!=NULL) { Data |= (0x01<<CH_UNMASKINT_EBL_OFFSET); GdmaUnMaskIntCallback[NewEntry->ChNum] = NewEntry->UnMaskIntCallback; } #if defined (CONFIG_RALINK_RT3883) || defined (CONFIG_RALINK_RT3352) || defined (CONFIG_RALINK_RT5350) Data |= (NewEntry->SrcReqNum << SRC_DMA_REQ_OFFSET); Data |= (NewEntry->DstReqNum << DST_DMA_REQ_OFFSET); #endif GDMA_WRITE_REG(GDMA_CTRL_REG1(NewEntry->ChNum), Data); GDMA_PRINT("CTRL1: Write %08X to %8X\n", Data, GDMA_CTRL_REG1(NewEntry->ChNum)); Data = ((NewEntry->TransCount) << TRANS_CNT_OFFSET); #if defined (CONFIG_RALINK_RT3052) Data |= (NewEntry->SrcReqNum << SRC_DMA_REQ_OFFSET); Data |= (NewEntry->DstReqNum << DST_DMA_REQ_OFFSET); #endif Data |= (NewEntry->SrcBurstMode << SRC_BRST_MODE_OFFSET); Data |= (NewEntry->DstBurstMode << DST_BRST_MODE_OFFSET); Data |= (NewEntry->BurstSize << BRST_SIZE_OFFSET); if(NewEntry->DoneIntCallback!=NULL) { Data |= (0x01<<CH_DONEINT_EBL_OFFSET); GdmaDoneIntCallback[NewEntry->ChNum] = NewEntry->DoneIntCallback; } if(NewEntry->SoftMode) { Data |= (0x01<<MODE_SEL_OFFSET); } Data |= (0x01<<CH_EBL_OFFSET); GDMA_WRITE_REG(GDMA_CTRL_REG(NewEntry->ChNum), Data); GDMA_PRINT("CTRL: Write %08X to %8X\n", Data, GDMA_CTRL_REG(NewEntry->ChNum)); //if there is no interrupt handler, this function will //return 1 until GDMA done. if(NewEntry->DoneIntCallback==NULL) { //wait for GDMA processing done #if defined (CONFIG_RALINK_RT3052) while((GDMA_READ_REG(RALINK_GDMAISTS) & (0x1<<NewEntry->ChNum))==0); //write 1 clear GDMA_WRITE_REG(RALINK_GDMAISTS, 1<< NewEntry->ChNum); #elif defined (CONFIG_RALINK_RT3883) || defined (CONFIG_RALINK_RT3352) || defined (CONFIG_RALINK_RT5350) while((GDMA_READ_REG(RALINK_GDMA_DONEINT) & (0x1<<NewEntry->ChNum))==0); //write 1 clear GDMA_WRITE_REG(RALINK_GDMA_DONEINT, 1<< NewEntry->ChNum); #endif } return 1; }