void dmacHw_initiateTransfer(dmacHw_HANDLE_t handle,
dmacHw_CONFIG_t *pConfig,
void *pDescriptor
) {
dmacHw_DESC_RING_t *pRing;
dmacHw_DESC_t *pProg;
dmacHw_CBLK_t *pCblk;
pCblk = dmacHw_HANDLE_TO_CBLK(handle);
pRing = dmacHw_GET_DESC_RING(pDescriptor);
if (CHANNEL_BUSY(pCblk->module, pCblk->channel)) {
return;
}
if (pCblk->varDataStarted) {
if (pCblk->descUpdated) {
pCblk->descUpdated = 0;
pProg =
(dmacHw_DESC_t *) ((uint32_t)
dmacHw_REG_LLP(pCblk->module,
pCblk->channel) +
pRing->virt2PhyOffset);
if (!(pProg->ctl.hi & dmacHw_REG_CTL_DONE)) {
dmacHw_SET_SAR(pCblk->module, pCblk->channel,
pProg->sar);
dmacHw_SET_DAR(pCblk->module, pCblk->channel,
pProg->dar);
dmacHw_REG_CTL_LO(pCblk->module,
pCblk->channel) =
pProg->ctl.lo;
dmacHw_REG_CTL_HI(pCblk->module,
pCblk->channel) =
pProg->ctl.hi;
} else if (pProg == (dmacHw_DESC_t *) pRing->pEnd->llp) {
return;
} else {
dmacHw_ASSERT(0);
}
} else {
return;
}
} else {
if (pConfig->transferMode == dmacHw_TRANSFER_MODE_PERIODIC) {
pProg = pRing->pHead;
dmacHw_NEXT_DESC(pRing, pHead);
} else {
if (pRing->pEnd == NULL) {
return;
}
pProg = pRing->pProg;
if (pConfig->transferMode ==
dmacHw_TRANSFER_MODE_CONTINUOUS) {
dmacHw_ASSERT((dmacHw_DESC_t *) pRing->pEnd->
llp == pRing->pProg);
dmacHw_ASSERT((dmacHw_DESC_t *) pRing->pProg ==
pRing->pHead);
do {
pRing->pProg->ctl.lo |=
(dmacHw_REG_CTL_LLP_DST_EN |
dmacHw_REG_CTL_LLP_SRC_EN);
pRing->pProg =
(dmacHw_DESC_t *) pRing->pProg->llp;
} while (pRing->pProg != pRing->pHead);
} else {
while (pRing->pProg != pRing->pEnd) {
pRing->pProg->ctl.lo |=
(dmacHw_REG_CTL_LLP_DST_EN |
dmacHw_REG_CTL_LLP_SRC_EN);
pRing->pProg =
(dmacHw_DESC_t *) pRing->pProg->llp;
}
}
}
dmacHw_SET_SAR(pCblk->module, pCblk->channel, pProg->sar);
dmacHw_SET_DAR(pCblk->module, pCblk->channel, pProg->dar);
dmacHw_SET_LLP(pCblk->module, pCblk->channel,
(uint32_t) pProg - pRing->virt2PhyOffset);
dmacHw_REG_CTL_LO(pCblk->module, pCblk->channel) =
pProg->ctl.lo;
dmacHw_REG_CTL_HI(pCblk->module, pCblk->channel) =
pProg->ctl.hi;
if (pRing->pEnd) {
pRing->pProg = (dmacHw_DESC_t *) pRing->pEnd->llp;
}
pRing->pEnd = (dmacHw_DESC_t *) NULL;
}
dmacHw_DMA_START(pCblk->module, pCblk->channel);
}
static void DisplayRegisterContents(int module, /* [ IN ] DMA Controller unit (0-1) */
int channel, /* [ IN ] DMA Channel (0-7) / -1(all) */
int (*fpPrint) (const char *, ...) /* [ IN ] Callback to the print function */
) {
int chan;
(*fpPrint) ("Displaying register content \n\n");
(*fpPrint) ("Module %d: Interrupt raw transfer 0x%X\n",
module, (uint32_t) (dmacHw_REG_INT_RAW_TRAN(module)));
(*fpPrint) ("Module %d: Interrupt raw block 0x%X\n",
module, (uint32_t) (dmacHw_REG_INT_RAW_BLOCK(module)));
(*fpPrint) ("Module %d: Interrupt raw src transfer 0x%X\n",
module, (uint32_t) (dmacHw_REG_INT_RAW_STRAN(module)));
(*fpPrint) ("Module %d: Interrupt raw dst transfer 0x%X\n",
module, (uint32_t) (dmacHw_REG_INT_RAW_DTRAN(module)));
(*fpPrint) ("Module %d: Interrupt raw error 0x%X\n",
module, (uint32_t) (dmacHw_REG_INT_RAW_ERROR(module)));
(*fpPrint) ("--------------------------------------------------\n");
(*fpPrint) ("Module %d: Interrupt stat transfer 0x%X\n",
module, (uint32_t) (dmacHw_REG_INT_STAT_TRAN(module)));
(*fpPrint) ("Module %d: Interrupt stat block 0x%X\n",
module, (uint32_t) (dmacHw_REG_INT_STAT_BLOCK(module)));
(*fpPrint) ("Module %d: Interrupt stat src transfer 0x%X\n",
module, (uint32_t) (dmacHw_REG_INT_STAT_STRAN(module)));
(*fpPrint) ("Module %d: Interrupt stat dst transfer 0x%X\n",
module, (uint32_t) (dmacHw_REG_INT_STAT_DTRAN(module)));
(*fpPrint) ("Module %d: Interrupt stat error 0x%X\n",
module, (uint32_t) (dmacHw_REG_INT_STAT_ERROR(module)));
(*fpPrint) ("--------------------------------------------------\n");
(*fpPrint) ("Module %d: Interrupt mask transfer 0x%X\n",
module, (uint32_t) (dmacHw_REG_INT_MASK_TRAN(module)));
(*fpPrint) ("Module %d: Interrupt mask block 0x%X\n",
module, (uint32_t) (dmacHw_REG_INT_MASK_BLOCK(module)));
(*fpPrint) ("Module %d: Interrupt mask src transfer 0x%X\n",
module, (uint32_t) (dmacHw_REG_INT_MASK_STRAN(module)));
(*fpPrint) ("Module %d: Interrupt mask dst transfer 0x%X\n",
module, (uint32_t) (dmacHw_REG_INT_MASK_DTRAN(module)));
(*fpPrint) ("Module %d: Interrupt mask error 0x%X\n",
module, (uint32_t) (dmacHw_REG_INT_MASK_ERROR(module)));
(*fpPrint) ("--------------------------------------------------\n");
(*fpPrint) ("Module %d: Interrupt clear transfer 0x%X\n",
module, (uint32_t) (dmacHw_REG_INT_CLEAR_TRAN(module)));
(*fpPrint) ("Module %d: Interrupt clear block 0x%X\n",
module, (uint32_t) (dmacHw_REG_INT_CLEAR_BLOCK(module)));
(*fpPrint) ("Module %d: Interrupt clear src transfer 0x%X\n",
module, (uint32_t) (dmacHw_REG_INT_CLEAR_STRAN(module)));
(*fpPrint) ("Module %d: Interrupt clear dst transfer 0x%X\n",
module, (uint32_t) (dmacHw_REG_INT_CLEAR_DTRAN(module)));
(*fpPrint) ("Module %d: Interrupt clear error 0x%X\n",
module, (uint32_t) (dmacHw_REG_INT_CLEAR_ERROR(module)));
(*fpPrint) ("--------------------------------------------------\n");
(*fpPrint) ("Module %d: SW source req 0x%X\n",
module, (uint32_t) (dmacHw_REG_SW_HS_SRC_REQ(module)));
(*fpPrint) ("Module %d: SW dest req 0x%X\n",
module, (uint32_t) (dmacHw_REG_SW_HS_DST_REQ(module)));
(*fpPrint) ("Module %d: SW source signal 0x%X\n",
module, (uint32_t) (dmacHw_REG_SW_HS_SRC_SGL_REQ(module)));
(*fpPrint) ("Module %d: SW dest signal 0x%X\n",
module, (uint32_t) (dmacHw_REG_SW_HS_DST_SGL_REQ(module)));
(*fpPrint) ("Module %d: SW source last 0x%X\n",
module, (uint32_t) (dmacHw_REG_SW_HS_SRC_LST_REQ(module)));
(*fpPrint) ("Module %d: SW dest last 0x%X\n",
module, (uint32_t) (dmacHw_REG_SW_HS_DST_LST_REQ(module)));
(*fpPrint) ("--------------------------------------------------\n");
(*fpPrint) ("Module %d: misc config 0x%X\n",
module, (uint32_t) (dmacHw_REG_MISC_CFG(module)));
(*fpPrint) ("Module %d: misc channel enable 0x%X\n",
module, (uint32_t) (dmacHw_REG_MISC_CH_ENABLE(module)));
(*fpPrint) ("Module %d: misc ID 0x%X\n",
module, (uint32_t) (dmacHw_REG_MISC_ID(module)));
(*fpPrint) ("Module %d: misc test 0x%X\n",
module, (uint32_t) (dmacHw_REG_MISC_TEST(module)));
if (channel == -1) {
for (chan = 0; chan < 8; chan++) {
(*fpPrint)
("--------------------------------------------------\n");
(*fpPrint)
("Module %d: Channel %d Source 0x%X\n",
module, chan,
(uint32_t) (dmacHw_REG_SAR(module, chan)));
(*fpPrint)
("Module %d: Channel %d Destination 0x%X\n",
module, chan,
(uint32_t) (dmacHw_REG_DAR(module, chan)));
(*fpPrint)
("Module %d: Channel %d LLP 0x%X\n",
module, chan,
(uint32_t) (dmacHw_REG_LLP(module, chan)));
(*fpPrint)
("Module %d: Channel %d Control (LO) 0x%X\n",
module, chan,
(uint32_t) (dmacHw_REG_CTL_LO(module, chan)));
(*fpPrint)
("Module %d: Channel %d Control (HI) 0x%X\n",
module, chan,
(uint32_t) (dmacHw_REG_CTL_HI(module, chan)));
(*fpPrint)
("Module %d: Channel %d Source Stats 0x%X\n",
module, chan,
(uint32_t) (dmacHw_REG_SSTAT(module, chan)));
(*fpPrint)
("Module %d: Channel %d Dest Stats 0x%X\n",
module, chan,
(uint32_t) (dmacHw_REG_DSTAT(module, chan)));
(*fpPrint)
("Module %d: Channel %d Source Stats Addr 0x%X\n",
module, chan,
(uint32_t) (dmacHw_REG_SSTATAR(module, chan)));
(*fpPrint)
("Module %d: Channel %d Dest Stats Addr 0x%X\n",
module, chan,
(uint32_t) (dmacHw_REG_DSTATAR(module, chan)));
(*fpPrint)
("Module %d: Channel %d Config (LO) 0x%X\n",
module, chan,
(uint32_t) (dmacHw_REG_CFG_LO(module, chan)));
(*fpPrint)
("Module %d: Channel %d Config (HI) 0x%X\n",
module, chan,
(uint32_t) (dmacHw_REG_CFG_HI(module, chan)));
}
} else {
chan = channel;
(*fpPrint)
("--------------------------------------------------\n");
(*fpPrint)
("Module %d: Channel %d Source 0x%X\n",
module, chan, (uint32_t) (dmacHw_REG_SAR(module, chan)));
(*fpPrint)
("Module %d: Channel %d Destination 0x%X\n",
module, chan, (uint32_t) (dmacHw_REG_DAR(module, chan)));
(*fpPrint)
("Module %d: Channel %d LLP 0x%X\n",
module, chan, (uint32_t) (dmacHw_REG_LLP(module, chan)));
(*fpPrint)
("Module %d: Channel %d Control (LO) 0x%X\n",
module, chan,
(uint32_t) (dmacHw_REG_CTL_LO(module, chan)));
(*fpPrint)
("Module %d: Channel %d Control (HI) 0x%X\n",
module, chan,
(uint32_t) (dmacHw_REG_CTL_HI(module, chan)));
(*fpPrint)
("Module %d: Channel %d Source Stats 0x%X\n",
module, chan, (uint32_t) (dmacHw_REG_SSTAT(module, chan)));
(*fpPrint)
("Module %d: Channel %d Dest Stats 0x%X\n",
module, chan, (uint32_t) (dmacHw_REG_DSTAT(module, chan)));
(*fpPrint)
("Module %d: Channel %d Source Stats Addr 0x%X\n",
module, chan,
(uint32_t) (dmacHw_REG_SSTATAR(module, chan)));
(*fpPrint)
("Module %d: Channel %d Dest Stats Addr 0x%X\n",
module, chan,
(uint32_t) (dmacHw_REG_DSTATAR(module, chan)));
(*fpPrint)
("Module %d: Channel %d Config (LO) 0x%X\n",
module, chan,
(uint32_t) (dmacHw_REG_CFG_LO(module, chan)));
(*fpPrint)
("Module %d: Channel %d Config (HI) 0x%X\n",
module, chan,
(uint32_t) (dmacHw_REG_CFG_HI(module, chan)));
}
}
void dmacHw_initiateTransfer(dmacHw_HANDLE_t handle, /* [ IN ] DMA Channel handle */
dmacHw_CONFIG_t *pConfig, /* [ IN ] Configuration settings */
void *pDescriptor /* [ IN ] Descriptor buffer */
) {
dmacHw_DESC_RING_t *pRing;
dmacHw_DESC_t *pProg;
dmacHw_CBLK_t *pCblk;
pCblk = dmacHw_HANDLE_TO_CBLK(handle);
pRing = dmacHw_GET_DESC_RING(pDescriptor);
if (CHANNEL_BUSY(pCblk->module, pCblk->channel)) {
/* Not safe yet to program the channel */
return;
}
if (pCblk->varDataStarted) {
if (pCblk->descUpdated) {
pCblk->descUpdated = 0;
pProg =
(dmacHw_DESC_t *) ((uint32_t)
dmacHw_REG_LLP(pCblk->module,
pCblk->channel) +
pRing->virt2PhyOffset);
/* Load descriptor if not loaded */
if (!(pProg->ctl.hi & dmacHw_REG_CTL_DONE)) {
dmacHw_SET_SAR(pCblk->module, pCblk->channel,
pProg->sar);
dmacHw_SET_DAR(pCblk->module, pCblk->channel,
pProg->dar);
dmacHw_REG_CTL_LO(pCblk->module,
pCblk->channel) =
pProg->ctl.lo;
dmacHw_REG_CTL_HI(pCblk->module,
pCblk->channel) =
pProg->ctl.hi;
} else if (pProg == (dmacHw_DESC_t *) pRing->pEnd->llp) {
/* Return as end descriptor is processed */
return;
} else {
dmacHw_ASSERT(0);
}
} else {
return;
}
} else {
if (pConfig->transferMode == dmacHw_TRANSFER_MODE_PERIODIC) {
/* Do not make a single chain, rather process one descriptor at a time */
pProg = pRing->pHead;
/* Point to the next descriptor for next iteration */
dmacHw_NEXT_DESC(pRing, pHead);
} else {
/* Return if no more pending descriptor */
if (pRing->pEnd == NULL) {
return;
}
pProg = pRing->pProg;
if (pConfig->transferMode ==
dmacHw_TRANSFER_MODE_CONTINUOUS) {
/* Make sure a complete ring can be formed */
dmacHw_ASSERT((dmacHw_DESC_t *) pRing->pEnd->
llp == pRing->pProg);
/* Make sure pProg pointing to the pHead */
dmacHw_ASSERT((dmacHw_DESC_t *) pRing->pProg ==
pRing->pHead);
/* Make a complete ring */
do {
pRing->pProg->ctl.lo |=
(dmacHw_REG_CTL_LLP_DST_EN |
dmacHw_REG_CTL_LLP_SRC_EN);
pRing->pProg =
(dmacHw_DESC_t *) pRing->pProg->llp;
} while (pRing->pProg != pRing->pHead);
} else {
/* Make a single long chain */
while (pRing->pProg != pRing->pEnd) {
pRing->pProg->ctl.lo |=
(dmacHw_REG_CTL_LLP_DST_EN |
dmacHw_REG_CTL_LLP_SRC_EN);
pRing->pProg =
(dmacHw_DESC_t *) pRing->pProg->llp;
}
}
}
/* Program the channel registers */
dmacHw_SET_SAR(pCblk->module, pCblk->channel, pProg->sar);
dmacHw_SET_DAR(pCblk->module, pCblk->channel, pProg->dar);
dmacHw_SET_LLP(pCblk->module, pCblk->channel,
(uint32_t) pProg - pRing->virt2PhyOffset);
dmacHw_REG_CTL_LO(pCblk->module, pCblk->channel) =
pProg->ctl.lo;
dmacHw_REG_CTL_HI(pCblk->module, pCblk->channel) =
pProg->ctl.hi;
if (pRing->pEnd) {
/* Remember the descriptor to use next */
pRing->pProg = (dmacHw_DESC_t *) pRing->pEnd->llp;
}
/* Indicate no more pending descriptor */
pRing->pEnd = (dmacHw_DESC_t *) NULL;
}
/* Start DMA operation */
dmacHw_DMA_START(pCblk->module, pCblk->channel);
}