diff options
Diffstat (limited to 'arch/arm/mach-bcmring/csp/dmac/dmacHw.c')
| -rw-r--r-- | arch/arm/mach-bcmring/csp/dmac/dmacHw.c | 916 |
1 files changed, 0 insertions, 916 deletions
diff --git a/arch/arm/mach-bcmring/csp/dmac/dmacHw.c b/arch/arm/mach-bcmring/csp/dmac/dmacHw.c deleted file mode 100644 index 547f746c7ff4..000000000000 --- a/arch/arm/mach-bcmring/csp/dmac/dmacHw.c +++ /dev/null @@ -1,916 +0,0 @@ -/***************************************************************************** -* Copyright 2003 - 2008 Broadcom Corporation. All rights reserved. -* -* Unless you and Broadcom execute a separate written software license -* agreement governing use of this software, this software is licensed to you -* under the terms of the GNU General Public License version 2, available at -* http://www.broadcom.com/licenses/GPLv2.php (the "GPL"). -* -* Notwithstanding the above, under no circumstances may you combine this -* software in any way with any other Broadcom software provided under a -* license other than the GPL, without Broadcom's express prior written -* consent. -*****************************************************************************/ - -/****************************************************************************/ -/** -* @file dmacHw.c -* -* @brief Low level DMA controller driver routines -* -* @note -* -* These routines provide basic DMA functionality only. -*/ -/****************************************************************************/ - -/* ---- Include Files ---------------------------------------------------- */ -#include <linux/types.h> -#include <linux/string.h> -#include <linux/stddef.h> - -#include <mach/csp/dmacHw.h> -#include <mach/csp/dmacHw_reg.h> -#include <mach/csp/dmacHw_priv.h> -#include <mach/csp/chipcHw_inline.h> - -/* ---- External Function Prototypes ------------------------------------- */ - -/* Allocate DMA control blocks */ -dmacHw_CBLK_t dmacHw_gCblk[dmacHw_MAX_CHANNEL_COUNT]; - -uint32_t dmaChannelCount_0 = dmacHw_MAX_CHANNEL_COUNT / 2; -uint32_t dmaChannelCount_1 = dmacHw_MAX_CHANNEL_COUNT / 2; - -/****************************************************************************/ -/** -* @brief Get maximum FIFO for a DMA channel -* -* @return Maximum allowable FIFO size -* -* -*/ -/****************************************************************************/ -static uint32_t GetFifoSize(dmacHw_HANDLE_t handle /* [ IN ] DMA Channel handle */ - ) { - uint32_t val = 0; - dmacHw_CBLK_t *pCblk = dmacHw_HANDLE_TO_CBLK(handle); - dmacHw_MISC_t __iomem *pMiscReg = (void __iomem *)dmacHw_REG_MISC_BASE(pCblk->module); - - switch (pCblk->channel) { - case 0: - val = (readl(&pMiscReg->CompParm2.lo) & 0x70000000) >> 28; - break; - case 1: - val = (readl(&pMiscReg->CompParm3.hi) & 0x70000000) >> 28; - break; - case 2: - val = (readl(&pMiscReg->CompParm3.lo) & 0x70000000) >> 28; - break; - case 3: - val = (readl(&pMiscReg->CompParm4.hi) & 0x70000000) >> 28; - break; - case 4: - val = (readl(&pMiscReg->CompParm4.lo) & 0x70000000) >> 28; - break; - case 5: - val = (readl(&pMiscReg->CompParm5.hi) & 0x70000000) >> 28; - break; - case 6: - val = (readl(&pMiscReg->CompParm5.lo) & 0x70000000) >> 28; - break; - case 7: - val = (readl(&pMiscReg->CompParm6.hi) & 0x70000000) >> 28; - break; - } - - if (val <= 0x4) { - return 8 << val; - } else { - dmacHw_ASSERT(0); - } - return 0; -} - -/****************************************************************************/ -/** -* @brief Program channel register to initiate transfer -* -* @return void -* -* -* @note -* - Descriptor buffer MUST ALWAYS be flushed before calling this function -* - This function should also be called from ISR to program the channel with -* pending descriptors -*/ -/****************************************************************************/ -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); -} - -/****************************************************************************/ -/** -* @brief Initializes DMA -* -* This function initializes DMA CSP driver -* -* @note -* Must be called before using any DMA channel -*/ -/****************************************************************************/ -void dmacHw_initDma(void) -{ - - uint32_t i = 0; - - dmaChannelCount_0 = dmacHw_GET_NUM_CHANNEL(0); - dmaChannelCount_1 = dmacHw_GET_NUM_CHANNEL(1); - - /* Enable access to the DMA block */ - chipcHw_busInterfaceClockEnable(chipcHw_REG_BUS_CLOCK_DMAC0); - chipcHw_busInterfaceClockEnable(chipcHw_REG_BUS_CLOCK_DMAC1); - - if ((dmaChannelCount_0 + dmaChannelCount_1) > dmacHw_MAX_CHANNEL_COUNT) { - dmacHw_ASSERT(0); - } - - memset((void *)dmacHw_gCblk, 0, - sizeof(dmacHw_CBLK_t) * (dmaChannelCount_0 + dmaChannelCount_1)); - for (i = 0; i < dmaChannelCount_0; i++) { - dmacHw_gCblk[i].module = 0; - dmacHw_gCblk[i].channel = i; - } - for (i = 0; i < dmaChannelCount_1; i++) { - dmacHw_gCblk[i + dmaChannelCount_0].module = 1; - dmacHw_gCblk[i + dmaChannelCount_0].channel = i; - } -} - -/****************************************************************************/ -/** -* @brief Exit function for DMA -* -* This function isolates DMA from the system -* -*/ -/****************************************************************************/ -void dmacHw_exitDma(void) -{ - /* Disable access to the DMA block */ - chipcHw_busInterfaceClockDisable(chipcHw_REG_BUS_CLOCK_DMAC0); - chipcHw_busInterfaceClockDisable(chipcHw_REG_BUS_CLOCK_DMAC1); -} - -/****************************************************************************/ -/** -* @brief Gets a handle to a DMA channel -* -* This function returns a handle, representing a control block of a particular DMA channel -* -* @return -1 - On Failure -* handle - On Success, representing a channel control block -* -* @note -* None Channel ID must be created using "dmacHw_MAKE_CHANNEL_ID" macro -*/ -/****************************************************************************/ -dmacHw_HANDLE_t dmacHw_getChannelHandle(dmacHw_ID_t channelId /* [ IN ] DMA Channel Id */ - ) { - int idx; - - switch ((channelId >> 8)) { - case 0: - dmacHw_ASSERT((channelId & 0xff) < dmaChannelCount_0); - idx = (channelId & 0xff); - break; - case 1: - dmacHw_ASSERT((channelId & 0xff) < dmaChannelCount_1); - idx = dmaChannelCount_0 + (channelId & 0xff); - break; - default: - dmacHw_ASSERT(0); - return (dmacHw_HANDLE_t) -1; - } - - return dmacHw_CBLK_TO_HANDLE(&dmacHw_gCblk[idx]); -} - -/****************************************************************************/ -/** -* @brief Initializes a DMA channel for use -* -* This function initializes and resets a DMA channel for use -* -* @return -1 - On Failure -* 0 - On Success -* -* @note -* None -*/ -/****************************************************************************/ -int dmacHw_initChannel(dmacHw_HANDLE_t handle /* [ IN ] DMA Channel handle */ - ) { - dmacHw_CBLK_t *pCblk = dmacHw_HANDLE_TO_CBLK(handle); - int module = pCblk->module; - int channel = pCblk->channel; - - /* Reinitialize the control block */ - memset((void *)pCblk, 0, sizeof(dmacHw_CBLK_t)); - pCblk->module = module; - pCblk->channel = channel; - - /* Enable DMA controller */ - dmacHw_DMA_ENABLE(pCblk->module); - /* Reset DMA channel */ - dmacHw_RESET_CONTROL_LO(pCblk->module, pCblk->channel); - dmacHw_RESET_CONTROL_HI(pCblk->module, pCblk->channel); - dmacHw_RESET_CONFIG_LO(pCblk->module, pCblk->channel); - dmacHw_RESET_CONFIG_HI(pCblk->module, pCblk->channel); - - /* Clear all raw interrupt status */ - dmacHw_TRAN_INT_CLEAR(pCblk->module, pCblk->channel); - dmacHw_BLOCK_INT_CLEAR(pCblk->module, pCblk->channel); - dmacHw_ERROR_INT_CLEAR(pCblk->module, pCblk->channel); - - /* Mask event specific interrupts */ - dmacHw_TRAN_INT_DISABLE(pCblk->module, pCblk->channel); - dmacHw_BLOCK_INT_DISABLE(pCblk->module, pCblk->channel); - dmacHw_STRAN_INT_DISABLE(pCblk->module, pCblk->channel); - dmacHw_DTRAN_INT_DISABLE(pCblk->module, pCblk->channel); - dmacHw_ERROR_INT_DISABLE(pCblk->module, pCblk->channel); - - return 0; -} - -/****************************************************************************/ -/** -* @brief Finds amount of memory required to form a descriptor ring -* -* -* @return Number of bytes required to form a descriptor ring -* -* -*/ -/****************************************************************************/ -uint32_t dmacHw_descriptorLen(uint32_t descCnt /* [ IN ] Number of descriptor in the ring */ - ) { - /* Need extra 4 byte to ensure 32 bit alignment */ - return (descCnt * sizeof(dmacHw_DESC_t)) + sizeof(dmacHw_DESC_RING_t) + - sizeof(uint32_t); -} - -/****************************************************************************/ -/** -* @brief Initializes descriptor ring -* -* This function will initializes the descriptor ring of a DMA channel -* -* -* @return -1 - On failure -* 0 - On success -* @note -* - "len" parameter should be obtained from "dmacHw_descriptorLen" -* - Descriptor buffer MUST be 32 bit aligned and uncached as it is -* accessed by ARM and DMA -*/ -/****************************************************************************/ -int dmacHw_initDescriptor(void *pDescriptorVirt, /* [ IN ] Virtual address of uncahced buffer allocated to form descriptor ring */ - uint32_t descriptorPhyAddr, /* [ IN ] Physical address of pDescriptorVirt (descriptor buffer) */ - uint32_t len, /* [ IN ] Size of the pBuf */ - uint32_t num /* [ IN ] Number of descriptor in the ring */ - ) { - uint32_t i; - dmacHw_DESC_RING_t *pRing; - dmacHw_DESC_t *pDesc; - - /* Check the alignment of the descriptor */ - if ((uint32_t) pDescriptorVirt & 0x00000003) { - dmacHw_ASSERT(0); - return -1; - } - - /* Check if enough space has been allocated for descriptor ring */ - if (len < dmacHw_descriptorLen(num)) { - return -1; - } - - pRing = dmacHw_GET_DESC_RING(pDescriptorVirt); - pRing->pHead = - (dmacHw_DESC_t *) ((uint32_t) pRing + sizeof(dmacHw_DESC_RING_t)); - pRing->pFree = pRing->pTail = pRing->pEnd = pRing->pHead; - pRing->pProg = dmacHw_DESC_INIT; - /* Initialize link item chain, starting from the head */ - pDesc = pRing->pHead; - /* Find the offset between virtual to physical address */ - pRing->virt2PhyOffset = (uint32_t) pDescriptorVirt - descriptorPhyAddr; - - /* Form the descriptor ring */ - for (i = 0; i < num - 1; i++) { - /* Clear link list item */ - memset((void *)pDesc, 0, sizeof(dmacHw_DESC_t)); - /* Point to the next item in the physical address */ - pDesc->llpPhy = (uint32_t) (pDesc + 1) - pRing->virt2PhyOffset; - /* Point to the next item in the virtual address */ - pDesc->llp = (uint32_t) (pDesc + 1); - /* Mark descriptor is ready to use */ - pDesc->ctl.hi = dmacHw_DESC_FREE; - /* Look into next link list item */ - pDesc++; - } - - /* Clear last link list item */ - memset((void *)pDesc, 0, sizeof(dmacHw_DESC_t)); - /* Last item pointing to the first item in the - physical address to complete the ring */ - pDesc->llpPhy = (uint32_t) pRing->pHead - pRing->virt2PhyOffset; - /* Last item pointing to the first item in the - virtual address to complete the ring - */ - pDesc->llp = (uint32_t) pRing->pHead; - /* Mark descriptor is ready to use */ - pDesc->ctl.hi = dmacHw_DESC_FREE; - /* Set the number of descriptors in the ring */ - pRing->num = num; - return 0; -} - -/****************************************************************************/ -/** -* @brief Configure DMA channel -* -* @return 0 : On success -* -1 : On failure -*/ -/****************************************************************************/ -int dmacHw_configChannel(dmacHw_HANDLE_t handle, /* [ IN ] DMA Channel handle */ - dmacHw_CONFIG_t *pConfig /* [ IN ] Configuration settings */ - ) { - dmacHw_CBLK_t *pCblk = dmacHw_HANDLE_TO_CBLK(handle); - uint32_t cfgHigh = 0; - int srcTrSize; - int dstTrSize; - - pCblk->varDataStarted = 0; - pCblk->userData = NULL; - - /* Configure - - Burst transaction when enough data in available in FIFO - - AHB Access protection 1 - - Source and destination peripheral ports - */ - cfgHigh = - dmacHw_REG_CFG_HI_FIFO_ENOUGH | dmacHw_REG_CFG_HI_AHB_HPROT_1 | - dmacHw_SRC_PERI_INTF(pConfig-> - srcPeripheralPort) | - dmacHw_DST_PERI_INTF(pConfig->dstPeripheralPort); - /* Set priority */ - dmacHw_SET_CHANNEL_PRIORITY(pCblk->module, pCblk->channel, - pConfig->channelPriority); - - if (pConfig->dstStatusRegisterAddress != 0) { - /* Destination status update enable */ - cfgHigh |= dmacHw_REG_CFG_HI_UPDATE_DST_STAT; - /* Configure status registers */ - dmacHw_SET_DSTATAR(pCblk->module, pCblk->channel, - pConfig->dstStatusRegisterAddress); - } - - if (pConfig->srcStatusRegisterAddress != 0) { - /* Source status update enable */ - cfgHigh |= dmacHw_REG_CFG_HI_UPDATE_SRC_STAT; - /* Source status update enable */ - dmacHw_SET_SSTATAR(pCblk->module, pCblk->channel, - pConfig->srcStatusRegisterAddress); - } - /* Configure the config high register */ - dmacHw_GET_CONFIG_HI(pCblk->module, pCblk->channel) = cfgHigh; - - /* Clear all raw interrupt status */ - dmacHw_TRAN_INT_CLEAR(pCblk->module, pCblk->channel); - dmacHw_BLOCK_INT_CLEAR(pCblk->module, pCblk->channel); - dmacHw_ERROR_INT_CLEAR(pCblk->module, pCblk->channel); - - /* Configure block interrupt */ - if (pConfig->blockTransferInterrupt == dmacHw_INTERRUPT_ENABLE) { - dmacHw_BLOCK_INT_ENABLE(pCblk->module, pCblk->channel); - } else { - dmacHw_BLOCK_INT_DISABLE(pCblk->module, pCblk->channel); - } - /* Configure complete transfer interrupt */ - if (pConfig->completeTransferInterrupt == dmacHw_INTERRUPT_ENABLE) { - dmacHw_TRAN_INT_ENABLE(pCblk->module, pCblk->channel); - } else { - dmacHw_TRAN_INT_DISABLE(pCblk->module, pCblk->channel); - } - /* Configure error interrupt */ - if (pConfig->errorInterrupt == dmacHw_INTERRUPT_ENABLE) { - dmacHw_ERROR_INT_ENABLE(pCblk->module, pCblk->channel); - } else { - dmacHw_ERROR_INT_DISABLE(pCblk->module, pCblk->channel); - } - /* Configure gather register */ - if (pConfig->srcGatherWidth) { - srcTrSize = - dmacHw_GetTrWidthInBytes(pConfig->srcMaxTransactionWidth); - if (! - ((pConfig->srcGatherWidth % srcTrSize) - && (pConfig->srcGatherJump % srcTrSize))) { - dmacHw_REG_SGR_LO(pCblk->module, pCblk->channel) = - ((pConfig->srcGatherWidth / - srcTrSize) << 20) | (pConfig->srcGatherJump / - srcTrSize); - } else { - return -1; - } - } - /* Configure scatter register */ - if (pConfig->dstScatterWidth) { - dstTrSize = - dmacHw_GetTrWidthInBytes(pConfig->dstMaxTransactionWidth); - if (! - ((pConfig->dstScatterWidth % dstTrSize) - && (pConfig->dstScatterJump % dstTrSize))) { - dmacHw_REG_DSR_LO(pCblk->module, pCblk->channel) = - ((pConfig->dstScatterWidth / - dstTrSize) << 20) | (pConfig->dstScatterJump / - dstTrSize); - } else { - return -1; - } - } - return 0; -} - -/****************************************************************************/ -/** -* @brief Indicates whether DMA transfer is in progress or completed -* -* @return DMA transfer status -* dmacHw_TRANSFER_STATUS_BUSY: DMA Transfer ongoing -* dmacHw_TRANSFER_STATUS_DONE: DMA Transfer completed -* dmacHw_TRANSFER_STATUS_ERROR: DMA Transfer error -* -*/ -/****************************************************************************/ -dmacHw_TRANSFER_STATUS_e dmacHw_transferCompleted(dmacHw_HANDLE_t handle /* [ IN ] DMA Channel handle */ - ) { - dmacHw_CBLK_t *pCblk = dmacHw_HANDLE_TO_CBLK(handle); - - if (CHANNEL_BUSY(pCblk->module, pCblk->channel)) { - return dmacHw_TRANSFER_STATUS_BUSY; - } else if (dmacHw_REG_INT_RAW_ERROR(pCblk->module) & - (0x00000001 << pCblk->channel)) { - return dmacHw_TRANSFER_STATUS_ERROR; - } - - return dmacHw_TRANSFER_STATUS_DONE; -} - -/****************************************************************************/ -/** -* @brief Set descriptors for known data length -* -* When DMA has to work as a flow controller, this function prepares the -* descriptor chain to transfer data -* -* from: -* - Memory to memory -* - Peripheral to memory -* - Memory to Peripheral -* - Peripheral to Peripheral -* -* @return -1 - On failure -* 0 - On success -* -*/ -/****************************************************************************/ -int dmacHw_setDataDescriptor(dmacHw_CONFIG_t *pConfig, /* [ IN ] Configuration settings */ - void *pDescriptor, /* [ IN ] Descriptor buffer */ - void *pSrcAddr, /* [ IN ] Source (Peripheral/Memory) address */ - void *pDstAddr, /* [ IN ] Destination (Peripheral/Memory) address */ - size_t dataLen /* [ IN ] Data length in bytes */ - ) { - dmacHw_TRANSACTION_WIDTH_e dstTrWidth; - dmacHw_TRANSACTION_WIDTH_e srcTrWidth; - dmacHw_DESC_RING_t *pRing = dmacHw_GET_DESC_RING(pDescriptor); - dmacHw_DESC_t *pStart; - dmacHw_DESC_t *pProg; - int srcTs = 0; - int blkTs = 0; - int oddSize = 0; - int descCount = 0; - int count = 0; - int dstTrSize = 0; - int srcTrSize = 0; - uint32_t maxBlockSize = dmacHw_MAX_BLOCKSIZE; - - dstTrSize = dmacHw_GetTrWidthInBytes(pConfig->dstMaxTransactionWidth); - srcTrSize = dmacHw_GetTrWidthInBytes(pConfig->srcMaxTransactionWidth); - - /* Skip Tx if buffer is NULL or length is unknown */ - if ((pSrcAddr == NULL) || (pDstAddr == NULL) || (dataLen == 0)) { - /* Do not initiate transfer */ - return -1; - } - - /* Ensure scatter and gather are transaction aligned */ - if ((pConfig->srcGatherWidth % srcTrSize) - || (pConfig->dstScatterWidth % dstTrSize)) { - return -2; - } - - /* - Background 1: DMAC can not perform DMA if source and destination addresses are - not properly aligned with the channel's transaction width. So, for successful - DMA transfer, transaction width must be set according to the alignment of the - source and destination address. - */ - - /* Adjust destination transaction width if destination address is not aligned properly */ - dstTrWidth = pConfig->dstMaxTransactionWidth; - while (dmacHw_ADDRESS_MASK(dstTrSize) & (uint32_t) pDstAddr) { - dstTrWidth = dmacHw_GetNextTrWidth(dstTrWidth); - dstTrSize = dmacHw_GetTrWidthInBytes(dstTrWidth); - } - - /* Adjust source transaction width if source address is not aligned properly */ - srcTrWidth = pConfig->srcMaxTransactionWidth; - while (dmacHw_ADDRESS_MASK(srcTrSize) & (uint32_t) pSrcAddr) { - srcTrWidth = dmacHw_GetNextTrWidth(srcTrWidth); - srcTrSize = dmacHw_GetTrWidthInBytes(srcTrWidth); - } - - /* Find the maximum transaction per descriptor */ - if (pConfig->maxDataPerBlock - && ((pConfig->maxDataPerBlock / srcTrSize) < - dmacHw_MAX_BLOCKSIZE)) { - maxBlockSize = pConfig->maxDataPerBlock / srcTrSize; - } - - /* Find number of source transactions needed to complete the DMA transfer */ - srcTs = dataLen / srcTrSize; - /* Find the odd number of bytes that need to be transferred as single byte transaction width */ - if (srcTs && (dstTrSize > srcTrSize)) { - oddSize = dataLen % dstTrSize; - /* Adjust source transaction count due to "oddSize" */ - srcTs = srcTs - (oddSize / srcTrSize); - } else { - oddSize = dataLen % srcTrSize; - } - /* Adjust "descCount" due to "oddSize" */ - if (oddSize) { - descCount++; - } - /* Find the number of descriptor needed for total "srcTs" */ - if (srcTs) { - descCount += ((srcTs - 1) / maxBlockSize) + 1; - } - - /* Check the availability of "descCount" discriptors in the ring */ - pProg = pRing->pHead; - for (count = 0; (descCount <= pRing->num) && (count < descCount); - count++) { - if ((pProg->ctl.hi & dmacHw_DESC_FREE) == 0) { - /* Sufficient descriptors are not available */ - return -3; - } - pProg = (dmacHw_DESC_t *) pProg->llp; - } - - /* Remember the link list item to program the channel registers */ - pStart = pProg = pRing->pHead; - /* Make a link list with "descCount(=count)" number of descriptors */ - while (count) { - /* Reset channel control information */ - pProg->ctl.lo = 0; - /* Enable source gather if configured */ - if (pConfig->srcGatherWidth) { - pProg->ctl.lo |= dmacHw_REG_CTL_SG_ENABLE; - } - /* Enable destination scatter if configured */ - if (pConfig->dstScatterWidth) { - pProg->ctl.lo |= dmacHw_REG_CTL_DS_ENABLE; - } - /* Set source and destination address */ - pProg->sar = (uint32_t) pSrcAddr; - pProg->dar = (uint32_t) pDstAddr; - /* Use "devCtl" to mark that user memory need to be freed later if needed */ - if (pProg == pRing->pHead) { - pProg->devCtl = dmacHw_FREE_USER_MEMORY; - } else { - pProg->devCtl = 0; - } - - blkTs = srcTs; - - /* Special treatmeant for last descriptor */ - if (count == 1) { - /* Mark the last descriptor */ - pProg->ctl.lo &= - ~(dmacHw_REG_CTL_LLP_DST_EN | - dmacHw_REG_CTL_LLP_SRC_EN); - /* Treatment for odd data bytes */ - if (oddSize) { - /* Adjust for single byte transaction width */ - switch (pConfig->transferType) { - case dmacHw_TRANSFER_TYPE_PERIPHERAL_TO_MEM: - dstTrWidth = - dmacHw_DST_TRANSACTION_WIDTH_8; - blkTs = - (oddSize / srcTrSize) + - ((oddSize % srcTrSize) ? 1 : 0); - break; - case dmacHw_TRANSFER_TYPE_MEM_TO_PERIPHERAL: - srcTrWidth = - dmacHw_SRC_TRANSACTION_WIDTH_8; - blkTs = oddSize; - break; - case dmacHw_TRANSFER_TYPE_MEM_TO_MEM: - srcTrWidth = - dmacHw_SRC_TRANSACTION_WIDTH_8; - dstTrWidth = - dmacHw_DST_TRANSACTION_WIDTH_8; - blkTs = oddSize; - break; - case dmacHw_TRANSFER_TYPE_PERIPHERAL_TO_PERIPHERAL: - /* Do not adjust the transaction width */ - break; - } - } else { - srcTs -= blkTs; - } - } else { - if (srcTs / maxBlockSize) { - blkTs = maxBlockSize; - } - /* Remaining source transactions for next iteration */ - srcTs -= blkTs; - } - /* Must have a valid source transactions */ - dmacHw_ASSERT(blkTs > 0); - /* Set control information */ - if (pConfig->flowControler == dmacHw_FLOW_CONTROL_DMA) { - pProg->ctl.lo |= pConfig->transferType | - pConfig->srcUpdate | - pConfig->dstUpdate | - srcTrWidth | - dstTrWidth | - pConfig->srcMaxBurstWidth | - pConfig->dstMaxBurstWidth | - pConfig->srcMasterInterface | - pConfig->dstMasterInterface | dmacHw_REG_CTL_INT_EN; - } else { - uint32_t transferType = 0; - switch (pConfig->transferType) { - case dmacHw_TRANSFER_TYPE_PERIPHERAL_TO_MEM: - transferType = dmacHw_REG_CTL_TTFC_PM_PERI; - break; - case dmacHw_TRANSFER_TYPE_MEM_TO_PERIPHERAL: - transferType = dmacHw_REG_CTL_TTFC_MP_PERI; - break; - default: - dmacHw_ASSERT(0); - } - pProg->ctl.lo |= transferType | - pConfig->srcUpdate | - pConfig->dstUpdate | - srcTrWidth | - dstTrWidth | - pConfig->srcMaxBurstWidth | - pConfig->dstMaxBurstWidth | - pConfig->srcMasterInterface | - pConfig->dstMasterInterface | dmacHw_REG_CTL_INT_EN; - } - - /* Set block transaction size */ - pProg->ctl.hi = blkTs & dmacHw_REG_CTL_BLOCK_TS_MASK; - /* Look for next descriptor */ - if (count > 1) { - /* Point to the next descriptor */ - pProg = (dmacHw_DESC_t *) pProg->llp; - - /* Update source and destination address for next iteration */ - switch (pConfig->transferType) { - case dmacHw_TRANSFER_TYPE_PERIPHERAL_TO_MEM: - if (pConfig->dstScatterWidth) { - pDstAddr = - (char *)pDstAddr + - blkTs * srcTrSize + - (((blkTs * srcTrSize) / - pConfig->dstScatterWidth) * - pConfig->dstScatterJump); - } else { - pDstAddr = - (char *)pDstAddr + - blkTs * srcTrSize; - } - break; - case dmacHw_TRANSFER_TYPE_MEM_TO_PERIPHERAL: - if (pConfig->srcGatherWidth) { - pSrcAddr = - (char *)pDstAddr + - blkTs * srcTrSize + - (((blkTs * srcTrSize) / - pConfig->srcGatherWidth) * - pConfig->srcGatherJump); - } else { - pSrcAddr = - (char *)pSrcAddr + - blkTs * srcTrSize; - } - break; - case dmacHw_TRANSFER_TYPE_MEM_TO_MEM: - if (pConfig->dstScatterWidth) { - pDstAddr = - (char *)pDstAddr + - blkTs * srcTrSize + - (((blkTs * srcTrSize) / - pConfig->dstScatterWidth) * - pConfig->dstScatterJump); - } else { - pDstAddr = - (char *)pDstAddr + - blkTs * srcTrSize; - } - - if (pConfig->srcGatherWidth) { - pSrcAddr = - (char *)pDstAddr + - blkTs * srcTrSize + - (((blkTs * srcTrSize) / - pConfig->srcGatherWidth) * - pConfig->srcGatherJump); - } else { - pSrcAddr = - (char *)pSrcAddr + - blkTs * srcTrSize; - } - break; - case dmacHw_TRANSFER_TYPE_PERIPHERAL_TO_PERIPHERAL: - /* Do not adjust the address */ - break; - default: - dmacHw_ASSERT(0); - } - } else { - /* At the end of transfer "srcTs" must be zero */ - dmacHw_ASSERT(srcTs == 0); - } - count--; - } - - /* Remember the descriptor to initialize the registers */ - if (pRing->pProg == dmacHw_DESC_INIT) { - pRing->pProg = pStart; - } - /* Indicate that the descriptor is updated */ - pRing->pEnd = pProg; - /* Head pointing to the next descriptor */ - pRing->pHead = (dmacHw_DESC_t *) pProg->llp; - /* Update Tail pointer if destination is a peripheral, - because no one is going to read from the pTail - */ - if (!dmacHw_DST_IS_MEMORY(pConfig->transferType)) { - pRing->pTail = pRing->pHead; - } - return 0; -} - -/****************************************************************************/ -/** -* @brief Provides DMA controller attributes -* -* -* @return DMA controller attributes -* -* @note -* None -*/ -/****************************************************************************/ -uint32_t dmacHw_getDmaControllerAttribute(dmacHw_HANDLE_t handle, /* [ IN ] DMA Channel handle */ - dmacHw_CONTROLLER_ATTRIB_e attr /* [ IN ] DMA Controller attribute of type dmacHw_CONTROLLER_ATTRIB_e */ - ) { - dmacHw_CBLK_t *pCblk = dmacHw_HANDLE_TO_CBLK(handle); - - switch (attr) { - case dmacHw_CONTROLLER_ATTRIB_CHANNEL_NUM: - return dmacHw_GET_NUM_CHANNEL(pCblk->module); - case dmacHw_CONTROLLER_ATTRIB_CHANNEL_MAX_BLOCK_SIZE: - return (1 << - (dmacHw_GET_MAX_BLOCK_SIZE - (pCblk->module, pCblk->module) + 2)) - 8; - case dmacHw_CONTROLLER_ATTRIB_MASTER_INTF_NUM: - return dmacHw_GET_NUM_INTERFACE(pCblk->module); - case dmacHw_CONTROLLER_ATTRIB_CHANNEL_BUS_WIDTH: - return 32 << dmacHw_GET_CHANNEL_DATA_WIDTH(pCblk->module, - pCblk->channel); - case dmacHw_CONTROLLER_ATTRIB_CHANNEL_FIFO_SIZE: - return GetFifoSize(handle); - } - dmacHw_ASSERT(0); - return 0; -} |