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rt-thread-official/bsp/nuvoton/libraries/m480/rtt_port/drv_pdma.c

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/**************************************************************************//**
*
* @copyright (C) 2020 Nuvoton Technology Corp. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-2-7 Wayne First version
*
******************************************************************************/
#include <rtconfig.h>
#if defined(BSP_USING_PDMA)
#include <rtdevice.h>
#include <rtthread.h>
#include <drv_pdma.h>
#include <nu_bitutil.h>
/* Private define ---------------------------------------------------------------*/
// RT_DEV_NAME_PREFIX pdma
#ifndef NU_PDMA_MEMFUN_ACTOR_MAX
#define NU_PDMA_MEMFUN_ACTOR_MAX (4)
#endif
#define NU_PDMA_SG_TBL_MAXSIZE (NU_PDMA_SG_LIMITED_DISTANCE/sizeof(DSCT_T))
#define NU_PDMA_CH_MAX (PDMA_CH_MAX) /* Specify maximum channels of PDMA */
#define NU_PDMA_CH_Pos (0) /* Specify first channel number of PDMA */
#define NU_PDMA_CH_Msk (((1 << NU_PDMA_CH_MAX) - 1) << NU_PDMA_CH_Pos)
/* Private typedef --------------------------------------------------------------*/
struct nu_pdma_periph_ctl
{
uint32_t m_u32Peripheral;
nu_pdma_memctrl_t m_eMemCtl;
};
typedef struct nu_pdma_periph_ctl nu_pdma_periph_ctl_t;
struct nu_pdma_chn
{
nu_pdma_cb_handler_t m_pfnCBHandler;
void *m_pvUserData;
uint32_t m_u32EventFilter;
uint32_t m_u32IdleTimeout_us;
nu_pdma_periph_ctl_t m_spPeripCtl;
};
typedef struct nu_pdma_chn nu_pdma_chn_t;
struct nu_pdma_memfun_actor
{
int m_i32ChannID;
uint32_t m_u32Result;
rt_sem_t m_psSemMemFun;
} ;
typedef struct nu_pdma_memfun_actor *nu_pdma_memfun_actor_t;
/* Private functions ------------------------------------------------------------*/
static int nu_pdma_peripheral_set(uint32_t u32PeriphType);
static void nu_pdma_init(void);
static void nu_pdma_channel_enable(int i32ChannID);
static void nu_pdma_channel_disable(int i32ChannID);
static void nu_pdma_channel_reset(int i32ChannID);
static rt_err_t nu_pdma_timeout_set(int i32ChannID, int i32Timeout_us);
static void nu_pdma_periph_ctrl_fill(int i32ChannID, int i32CtlPoolIdx);
static rt_ssize_t nu_pdma_memfun(void *dest, void *src, uint32_t u32DataWidth, unsigned int count, nu_pdma_memctrl_t eMemCtl);
static void nu_pdma_memfun_cb(void *pvUserData, uint32_t u32Events);
static void nu_pdma_memfun_actor_init(void);
static int nu_pdma_memfun_employ(void);
static int nu_pdma_non_transfer_count_get(int32_t i32ChannID);
/* Public functions -------------------------------------------------------------*/
/* Private variables ------------------------------------------------------------*/
static volatile int nu_pdma_inited = 0;
static volatile uint32_t nu_pdma_chn_mask = 0;
static nu_pdma_chn_t nu_pdma_chn_arr[NU_PDMA_CH_MAX];
static rt_mutex_t g_mutex_res = RT_NULL;
static volatile uint32_t nu_pdma_memfun_actor_mask = 0;
static volatile uint32_t nu_pdma_memfun_actor_maxnum = 0;
static rt_sem_t nu_pdma_memfun_actor_pool_sem = RT_NULL;
static rt_mutex_t nu_pdma_memfun_actor_pool_lock = RT_NULL;
static const nu_pdma_periph_ctl_t g_nu_pdma_peripheral_ctl_pool[ ] =
{
// M2M
{ PDMA_MEM, eMemCtl_SrcInc_DstInc },
// M2P
{ PDMA_USB_TX, eMemCtl_SrcInc_DstFix },
{ PDMA_UART0_TX, eMemCtl_SrcInc_DstFix },
{ PDMA_UART1_TX, eMemCtl_SrcInc_DstFix },
{ PDMA_UART2_TX, eMemCtl_SrcInc_DstFix },
{ PDMA_UART3_TX, eMemCtl_SrcInc_DstFix },
{ PDMA_UART4_TX, eMemCtl_SrcInc_DstFix },
{ PDMA_UART5_TX, eMemCtl_SrcInc_DstFix },
{ PDMA_UART6_TX, eMemCtl_SrcInc_DstFix },
{ PDMA_UART7_TX, eMemCtl_SrcInc_DstFix },
{ PDMA_USCI0_TX, eMemCtl_SrcInc_DstFix },
{ PDMA_USCI1_TX, eMemCtl_SrcInc_DstFix },
{ PDMA_QSPI0_TX, eMemCtl_SrcInc_DstFix },
{ PDMA_QSPI1_TX, eMemCtl_SrcInc_DstFix },
{ PDMA_SPI0_TX, eMemCtl_SrcInc_DstFix },
{ PDMA_SPI1_TX, eMemCtl_SrcInc_DstFix },
{ PDMA_SPI2_TX, eMemCtl_SrcInc_DstFix },
{ PDMA_SPI3_TX, eMemCtl_SrcInc_DstFix },
{ PDMA_I2C0_TX, eMemCtl_SrcInc_DstFix },
{ PDMA_I2C1_TX, eMemCtl_SrcInc_DstFix },
{ PDMA_I2C2_TX, eMemCtl_SrcInc_DstFix },
{ PDMA_I2S0_TX, eMemCtl_SrcInc_DstFix },
{ PDMA_DAC0_TX, eMemCtl_SrcInc_DstFix },
{ PDMA_DAC1_TX, eMemCtl_SrcInc_DstFix },
{ PDMA_EPWM0_CH0_TX, eMemCtl_SrcInc_DstFix },
{ PDMA_EPWM0_CH1_TX, eMemCtl_SrcInc_DstFix },
{ PDMA_EPWM0_CH2_TX, eMemCtl_SrcInc_DstFix },
{ PDMA_EPWM0_CH3_TX, eMemCtl_SrcInc_DstFix },
{ PDMA_EPWM0_CH4_TX, eMemCtl_SrcInc_DstFix },
{ PDMA_EPWM1_CH0_TX, eMemCtl_SrcInc_DstFix },
{ PDMA_EPWM1_CH1_TX, eMemCtl_SrcInc_DstFix },
{ PDMA_EPWM1_CH2_TX, eMemCtl_SrcInc_DstFix },
{ PDMA_EPWM1_CH3_TX, eMemCtl_SrcInc_DstFix },
{ PDMA_EPWM1_CH4_TX, eMemCtl_SrcInc_DstFix },
// P2M
{ PDMA_USB_RX, eMemCtl_SrcFix_DstInc },
{ PDMA_UART0_RX, eMemCtl_SrcFix_DstInc },
{ PDMA_UART1_RX, eMemCtl_SrcFix_DstInc },
{ PDMA_UART2_RX, eMemCtl_SrcFix_DstInc },
{ PDMA_UART3_RX, eMemCtl_SrcFix_DstInc },
{ PDMA_UART4_RX, eMemCtl_SrcFix_DstInc },
{ PDMA_UART5_RX, eMemCtl_SrcFix_DstInc },
{ PDMA_UART6_RX, eMemCtl_SrcFix_DstInc },
{ PDMA_UART7_RX, eMemCtl_SrcFix_DstInc },
{ PDMA_USCI0_RX, eMemCtl_SrcFix_DstInc },
{ PDMA_USCI1_RX, eMemCtl_SrcFix_DstInc },
{ PDMA_QSPI0_RX, eMemCtl_SrcFix_DstInc },
{ PDMA_QSPI1_RX, eMemCtl_SrcFix_DstInc },
{ PDMA_SPI0_RX, eMemCtl_SrcFix_DstInc },
{ PDMA_SPI1_RX, eMemCtl_SrcFix_DstInc },
{ PDMA_SPI2_RX, eMemCtl_SrcFix_DstInc },
{ PDMA_SPI3_RX, eMemCtl_SrcFix_DstInc },
{ PDMA_EPWM0_P1_RX, eMemCtl_SrcFix_DstInc },
{ PDMA_EPWM0_P2_RX, eMemCtl_SrcFix_DstInc },
{ PDMA_EPWM0_P3_RX, eMemCtl_SrcFix_DstInc },
{ PDMA_EPWM1_P1_RX, eMemCtl_SrcFix_DstInc },
{ PDMA_EPWM1_P2_RX, eMemCtl_SrcFix_DstInc },
{ PDMA_EPWM1_P3_RX, eMemCtl_SrcFix_DstInc },
{ PDMA_I2C0_RX, eMemCtl_SrcFix_DstInc },
{ PDMA_I2C1_RX, eMemCtl_SrcFix_DstInc },
{ PDMA_I2C2_RX, eMemCtl_SrcFix_DstInc },
{ PDMA_I2S0_RX, eMemCtl_SrcFix_DstInc },
{ PDMA_EADC0_RX, eMemCtl_SrcFix_DstInc },
{ PDMA_EADC1_RX, eMemCtl_SrcFix_DstInc },
};
#define NU_PERIPHERAL_SIZE ( sizeof(g_nu_pdma_peripheral_ctl_pool) / sizeof(g_nu_pdma_peripheral_ctl_pool[0]) )
static struct nu_pdma_memfun_actor nu_pdma_memfun_actor_arr[NU_PDMA_MEMFUN_ACTOR_MAX];
/* SG table pool */
static DSCT_T nu_pdma_sgtbl_arr[NU_PDMA_SGTBL_POOL_SIZE] = { 0 };
static uint32_t nu_pdma_sgtbl_token[RT_ALIGN(NU_PDMA_SGTBL_POOL_SIZE, 32) / 32];
static rt_mutex_t g_mutex_sg = RT_NULL;
static int nu_pdma_peripheral_set(uint32_t u32PeriphType)
{
int idx = 0;
while (idx < NU_PERIPHERAL_SIZE)
{
if (g_nu_pdma_peripheral_ctl_pool[idx].m_u32Peripheral == u32PeriphType)
return idx;
idx++;
}
// Not such peripheral
return -1;
}
static void nu_pdma_periph_ctrl_fill(int i32ChannID, int i32CtlPoolIdx)
{
nu_pdma_chn_t *psPdmaChann = &nu_pdma_chn_arr[i32ChannID - NU_PDMA_CH_Pos];
psPdmaChann->m_spPeripCtl.m_u32Peripheral = g_nu_pdma_peripheral_ctl_pool[i32CtlPoolIdx].m_u32Peripheral;
psPdmaChann->m_spPeripCtl.m_eMemCtl = g_nu_pdma_peripheral_ctl_pool[i32CtlPoolIdx].m_eMemCtl;
}
static void nu_pdma_init(void)
{
int latest = 0;
if (nu_pdma_inited)
return;
g_mutex_res = rt_mutex_create("pdmalock", RT_IPC_FLAG_PRIO);
RT_ASSERT(g_mutex_res != RT_NULL);
g_mutex_sg = rt_mutex_create("sgtbles", RT_IPC_FLAG_PRIO);
RT_ASSERT(g_mutex_sg != RT_NULL);
nu_pdma_chn_mask = ~NU_PDMA_CH_Msk;
rt_memset(nu_pdma_chn_arr, 0x00, NU_PDMA_CH_MAX * sizeof(nu_pdma_chn_t));
NVIC_EnableIRQ(PDMA_IRQn);
/* Initialize PDMA setting */
PDMA_Open(PDMA, NU_PDMA_CH_Msk);
PDMA_Close(PDMA);
rt_memset(&nu_pdma_sgtbl_arr[0], 0x00, sizeof(nu_pdma_sgtbl_arr));
/* Assign first SG table address as PDMA SG table base address */
PDMA->SCATBA = (uint32_t)&nu_pdma_sgtbl_arr[0];
/* Initialize token pool. */
rt_memset(&nu_pdma_sgtbl_token[0], 0xff, sizeof(nu_pdma_sgtbl_token));
if (NU_PDMA_SGTBL_POOL_SIZE % 32)
{
latest = (NU_PDMA_SGTBL_POOL_SIZE) / 32;
nu_pdma_sgtbl_token[latest] ^= ~((1 << (NU_PDMA_SGTBL_POOL_SIZE % 32)) - 1) ;
}
nu_pdma_inited = 1;
}
static void nu_pdma_channel_enable(int i32ChannID)
{
PDMA_Open(PDMA, 1 << i32ChannID);
}
static inline void nu_pdma_channel_disable(int i32ChannID)
{
PDMA->CHCTL &= ~(1 << i32ChannID);
}
static inline void nu_pdma_channel_reset(int i32ChannID)
{
PDMA->CHRST = (1 << i32ChannID);
}
void nu_pdma_channel_terminate(int i32ChannID)
{
int i;
uint32_t u32EnabledChans;
int ch_mask = 0;
rt_err_t result;
if (!(nu_pdma_chn_mask & (1 << i32ChannID)))
goto exit_pdma_channel_terminate;
result = rt_mutex_take(g_mutex_res, RT_WAITING_FOREVER);
RT_ASSERT(result == RT_EOK);
// Suspend all channels.
u32EnabledChans = nu_pdma_chn_mask & NU_PDMA_CH_Msk;
while ((i = nu_ctz(u32EnabledChans)) != 32)
{
ch_mask = (1 << i);
if (i == i32ChannID)
{
u32EnabledChans &= ~ch_mask;
continue;
}
// Pause the channel
PDMA_PAUSE(PDMA, i);
// Wait for channel to finish current transfer
while (PDMA->TACTSTS & ch_mask) { }
u32EnabledChans &= ~ch_mask;
} //while
// Reset specified channel ID
nu_pdma_channel_reset(i32ChannID);
// Clean descriptor table control register.
PDMA->DSCT[i32ChannID].CTL = 0UL;
// Resume all channels.
u32EnabledChans = nu_pdma_chn_mask & NU_PDMA_CH_Msk;
while ((i = nu_ctz(u32EnabledChans)) != 32)
{
ch_mask = (1 << i);
PDMA->CHCTL |= ch_mask;
PDMA_Trigger(PDMA, i);
u32EnabledChans &= ~ch_mask;
}
result = rt_mutex_release(g_mutex_res);
RT_ASSERT(result == RT_EOK);
exit_pdma_channel_terminate:
return;
}
static rt_err_t nu_pdma_timeout_set(int i32ChannID, int i32Timeout_us)
{
rt_err_t ret = -RT_EINVAL;
if (!(nu_pdma_chn_mask & (1 << i32ChannID)))
goto exit_nu_pdma_timeout_set;
nu_pdma_chn_arr[i32ChannID - NU_PDMA_CH_Pos].m_u32IdleTimeout_us = i32Timeout_us;
if (i32Timeout_us && i32ChannID <= 1) // M480 limit
{
uint32_t u32ToClk_Max = 1000000 / (CLK_GetHCLKFreq() / (1 << 8));
uint32_t u32Divider = (i32Timeout_us / u32ToClk_Max) / (1 << 16);
uint32_t u32TOutCnt = (i32Timeout_us / u32ToClk_Max) % (1 << 16);
PDMA_DisableTimeout(PDMA, 1 << i32ChannID);
PDMA_EnableInt(PDMA, i32ChannID, PDMA_INT_TIMEOUT); // Interrupt type
if (u32Divider > 7)
{
u32Divider = 7;
u32TOutCnt = (1 << 16);
}
PDMA->TOUTPSC |= (u32Divider << (PDMA_TOUTPSC_TOUTPSC1_Pos * i32ChannID));
PDMA_SetTimeOut(PDMA, i32ChannID, 1, u32TOutCnt);
ret = RT_EOK;
}
else
{
PDMA_DisableInt(PDMA, i32ChannID, PDMA_INT_TIMEOUT); // Interrupt type
PDMA_DisableTimeout(PDMA, 1 << i32ChannID);
}
exit_nu_pdma_timeout_set:
return -(ret);
}
int nu_pdma_channel_allocate(int32_t i32PeripType)
{
int i, i32PeripCtlIdx;
nu_pdma_init();
if ((i32PeripCtlIdx = nu_pdma_peripheral_set(i32PeripType)) < 0)
goto exit_nu_pdma_channel_allocate;
/* Find the position of first '0' in nu_pdma_chn_mask. */
i = nu_cto(nu_pdma_chn_mask);
if (i != 32)
{
nu_pdma_chn_mask |= (1 << i);
rt_memset(nu_pdma_chn_arr + i - NU_PDMA_CH_Pos, 0x00, sizeof(nu_pdma_chn_t));
/* Set idx number of g_nu_pdma_peripheral_ctl_pool */
nu_pdma_periph_ctrl_fill(i, i32PeripCtlIdx);
/* Reset channel */
nu_pdma_channel_reset(i);
nu_pdma_channel_enable(i);
return i;
}
exit_nu_pdma_channel_allocate:
// No channel available
return -(RT_ERROR);
}
rt_err_t nu_pdma_channel_free(int i32ChannID)
{
rt_err_t ret = -RT_EINVAL;
if (! nu_pdma_inited)
goto exit_nu_pdma_channel_free;
if (i32ChannID < NU_PDMA_CH_MAX && i32ChannID >= NU_PDMA_CH_Pos)
{
nu_pdma_chn_mask &= ~(1 << i32ChannID);
nu_pdma_channel_disable(i32ChannID);
ret = RT_EOK;
}
exit_nu_pdma_channel_free:
return -(ret);
}
rt_err_t nu_pdma_callback_register(int i32ChannID, nu_pdma_cb_handler_t pfnHandler, void *pvUserData, uint32_t u32EventFilter)
{
rt_err_t ret = -RT_EINVAL;
if (!(nu_pdma_chn_mask & (1 << i32ChannID)))
goto exit_nu_pdma_callback_register;
nu_pdma_chn_arr[i32ChannID - NU_PDMA_CH_Pos].m_pfnCBHandler = pfnHandler;
nu_pdma_chn_arr[i32ChannID - NU_PDMA_CH_Pos].m_pvUserData = pvUserData;
nu_pdma_chn_arr[i32ChannID - NU_PDMA_CH_Pos].m_u32EventFilter = u32EventFilter;
ret = RT_EOK;
exit_nu_pdma_callback_register:
return -(ret) ;
}
nu_pdma_cb_handler_t nu_pdma_callback_hijack(int i32ChannID, nu_pdma_cb_handler_t *ppfnHandler_Hijack,
void **ppvUserData_Hijack, uint32_t *pu32Events_Hijack)
{
nu_pdma_cb_handler_t pfnHandler_Org = NULL;
void *pvUserData_Org;
uint32_t u32Events_Org;
RT_ASSERT(ppfnHandler_Hijack != NULL);
RT_ASSERT(ppvUserData_Hijack != NULL);
RT_ASSERT(pu32Events_Hijack != NULL);
if (!(nu_pdma_chn_mask & (1 << i32ChannID)))
goto exit_nu_pdma_callback_hijack;
pfnHandler_Org = nu_pdma_chn_arr[i32ChannID - NU_PDMA_CH_Pos].m_pfnCBHandler;
pvUserData_Org = nu_pdma_chn_arr[i32ChannID - NU_PDMA_CH_Pos].m_pvUserData;
u32Events_Org = nu_pdma_chn_arr[i32ChannID - NU_PDMA_CH_Pos].m_u32EventFilter;
nu_pdma_chn_arr[i32ChannID - NU_PDMA_CH_Pos].m_pfnCBHandler = *ppfnHandler_Hijack;
nu_pdma_chn_arr[i32ChannID - NU_PDMA_CH_Pos].m_pvUserData = *ppvUserData_Hijack;
nu_pdma_chn_arr[i32ChannID - NU_PDMA_CH_Pos].m_u32EventFilter = *pu32Events_Hijack;
*ppfnHandler_Hijack = pfnHandler_Org;
*ppvUserData_Hijack = pvUserData_Org;
*pu32Events_Hijack = u32Events_Org;
exit_nu_pdma_callback_hijack:
return pfnHandler_Org;
}
static int nu_pdma_non_transfer_count_get(int32_t i32ChannID)
{
return ((PDMA->DSCT[i32ChannID].CTL & PDMA_DSCT_CTL_TXCNT_Msk) >> PDMA_DSCT_CTL_TXCNT_Pos) + 1;
}
int nu_pdma_transferred_byte_get(int32_t i32ChannID, int32_t i32TriggerByteLen)
{
int i32BitWidth = 0;
int cur_txcnt = 0;
if (!(nu_pdma_chn_mask & (1 << i32ChannID)))
goto exit_nu_pdma_transferred_byte_get;
i32BitWidth = PDMA->DSCT[i32ChannID].CTL & PDMA_DSCT_CTL_TXWIDTH_Msk;
i32BitWidth = (i32BitWidth == PDMA_WIDTH_8) ? 1 : (i32BitWidth == PDMA_WIDTH_16) ? 2 : (i32BitWidth == PDMA_WIDTH_32) ? 4 : 0;
cur_txcnt = nu_pdma_non_transfer_count_get(i32ChannID);
return (i32TriggerByteLen - (cur_txcnt) * i32BitWidth);
exit_nu_pdma_transferred_byte_get:
return -1;
}
nu_pdma_memctrl_t nu_pdma_channel_memctrl_get(int i32ChannID)
{
nu_pdma_memctrl_t eMemCtrl = eMemCtl_Undefined;
if (!(nu_pdma_chn_mask & (1 << i32ChannID)))
goto exit_nu_pdma_channel_memctrl_get;
eMemCtrl = nu_pdma_chn_arr[i32ChannID - NU_PDMA_CH_Pos].m_spPeripCtl.m_eMemCtl;
exit_nu_pdma_channel_memctrl_get:
return eMemCtrl;
}
rt_err_t nu_pdma_channel_memctrl_set(int i32ChannID, nu_pdma_memctrl_t eMemCtrl)
{
rt_err_t ret = -RT_EINVAL;
nu_pdma_chn_t *psPdmaChann = &nu_pdma_chn_arr[i32ChannID - NU_PDMA_CH_Pos];
if (!(nu_pdma_chn_mask & (1 << i32ChannID)))
goto exit_nu_pdma_channel_memctrl_set;
else if ((eMemCtrl < eMemCtl_SrcFix_DstFix) || (eMemCtrl > eMemCtl_SrcInc_DstInc))
goto exit_nu_pdma_channel_memctrl_set;
/* PDMA_MEM/SAR_FIX/BURST mode is not supported. */
if ((psPdmaChann->m_spPeripCtl.m_u32Peripheral == PDMA_MEM) &&
((eMemCtrl == eMemCtl_SrcFix_DstInc) || (eMemCtrl == eMemCtl_SrcFix_DstFix)))
goto exit_nu_pdma_channel_memctrl_set;
nu_pdma_chn_arr[i32ChannID - NU_PDMA_CH_Pos].m_spPeripCtl.m_eMemCtl = eMemCtrl;
ret = RT_EOK;
exit_nu_pdma_channel_memctrl_set:
return -(ret);
}
static void nu_pdma_channel_memctrl_fill(nu_pdma_memctrl_t eMemCtl, uint32_t *pu32SrcCtl, uint32_t *pu32DstCtl)
{
switch ((int)eMemCtl)
{
case eMemCtl_SrcFix_DstFix:
*pu32SrcCtl = PDMA_SAR_FIX;
*pu32DstCtl = PDMA_DAR_FIX;
break;
case eMemCtl_SrcFix_DstInc:
*pu32SrcCtl = PDMA_SAR_FIX;
*pu32DstCtl = PDMA_DAR_INC;
break;
case eMemCtl_SrcInc_DstFix:
*pu32SrcCtl = PDMA_SAR_INC;
*pu32DstCtl = PDMA_DAR_FIX;
break;
case eMemCtl_SrcInc_DstInc:
*pu32SrcCtl = PDMA_SAR_INC;
*pu32DstCtl = PDMA_DAR_INC;
break;
default:
break;
}
}
/* This is for Scatter-gather DMA. */
rt_err_t nu_pdma_desc_setup(int i32ChannID, nu_pdma_desc_t dma_desc, uint32_t u32DataWidth, uint32_t u32AddrSrc,
uint32_t u32AddrDst, int32_t i32TransferCnt, nu_pdma_desc_t next)
{
nu_pdma_periph_ctl_t *psPeriphCtl = NULL;
uint32_t u32SrcCtl = 0;
uint32_t u32DstCtl = 0;
rt_err_t ret = -RT_EINVAL;
if (!dma_desc)
goto exit_nu_pdma_desc_setup;
else if (!(nu_pdma_chn_mask & (1 << i32ChannID)))
goto exit_nu_pdma_desc_setup;
else if (!(u32DataWidth == 8 || u32DataWidth == 16 || u32DataWidth == 32))
goto exit_nu_pdma_desc_setup;
else if ((u32AddrSrc % (u32DataWidth / 8)) || (u32AddrDst % (u32DataWidth / 8)))
goto exit_nu_pdma_desc_setup;
else if (i32TransferCnt > NU_PDMA_MAX_TXCNT)
goto exit_nu_pdma_desc_setup;
psPeriphCtl = &nu_pdma_chn_arr[i32ChannID - NU_PDMA_CH_Pos].m_spPeripCtl;
nu_pdma_channel_memctrl_fill(psPeriphCtl->m_eMemCtl, &u32SrcCtl, &u32DstCtl);
dma_desc->CTL = ((i32TransferCnt - 1) << PDMA_DSCT_CTL_TXCNT_Pos) |
((u32DataWidth == 8) ? PDMA_WIDTH_8 : (u32DataWidth == 16) ? PDMA_WIDTH_16 : PDMA_WIDTH_32) |
u32SrcCtl |
u32DstCtl |
PDMA_OP_BASIC;
dma_desc->SA = u32AddrSrc;
dma_desc->DA = u32AddrDst;
dma_desc->NEXT = 0; /* Terminating node by default. */
if (psPeriphCtl->m_u32Peripheral == PDMA_MEM)
{
/* For M2M transfer */
dma_desc->CTL |= (PDMA_REQ_BURST | PDMA_BURST_32);
}
else
{
/* For P2M and M2P transfer */
dma_desc->CTL |= (PDMA_REQ_SINGLE);
}
if (next)
{
/* Link to Next and modify to scatter-gather DMA mode. */
dma_desc->CTL = (dma_desc->CTL & ~PDMA_DSCT_CTL_OPMODE_Msk) | PDMA_OP_SCATTER;
dma_desc->NEXT = (uint32_t)next - (PDMA->SCATBA);
}
ret = RT_EOK;
exit_nu_pdma_desc_setup:
return -(ret);
}
static int nu_pdma_sgtbls_token_allocate(void)
{
int idx, i;
int pool_size = sizeof(nu_pdma_sgtbl_token) / sizeof(uint32_t);
for (i = 0; i < pool_size; i++)
{
if ((idx = nu_ctz(nu_pdma_sgtbl_token[i])) != 32)
{
nu_pdma_sgtbl_token[i] &= ~(1 << idx);
idx += i * 32;
return idx;
}
}
/* No available */
return -1;
}
static void nu_pdma_sgtbls_token_free(nu_pdma_desc_t psSgtbls)
{
int idx = (int)(psSgtbls - &nu_pdma_sgtbl_arr[0]);
RT_ASSERT(idx >= 0);
RT_ASSERT((idx + 1) <= NU_PDMA_SGTBL_POOL_SIZE);
nu_pdma_sgtbl_token[idx / 32] |= (1 << (idx % 32));
}
rt_err_t nu_pdma_sgtbls_allocate(nu_pdma_desc_t *ppsSgtbls, int num)
{
int i, j, idx;
rt_err_t result;
RT_ASSERT(ppsSgtbls != NULL);
RT_ASSERT(num <= NU_PDMA_SG_TBL_MAXSIZE);
result = rt_mutex_take(g_mutex_sg, RT_WAITING_FOREVER);
RT_ASSERT(result == RT_EOK);
for (i = 0; i < num; i++)
{
ppsSgtbls[i] = NULL;
/* Get token. */
if ((idx = nu_pdma_sgtbls_token_allocate()) < 0)
{
rt_kprintf("No available sgtbl.\n");
goto fail_nu_pdma_sgtbls_allocate;
}
ppsSgtbls[i] = (nu_pdma_desc_t)&nu_pdma_sgtbl_arr[idx];
}
result = rt_mutex_release(g_mutex_sg);
RT_ASSERT(result == RT_EOK);
return RT_EOK;
fail_nu_pdma_sgtbls_allocate:
/* Release allocated tables. */
for (j = 0; j < i; j++)
{
if (ppsSgtbls[j] != NULL)
{
nu_pdma_sgtbls_token_free(ppsSgtbls[j]);
}
ppsSgtbls[j] = NULL;
}
result = rt_mutex_release(g_mutex_sg);
RT_ASSERT(result == RT_EOK);
return -RT_ERROR;
}
void nu_pdma_sgtbls_free(nu_pdma_desc_t *ppsSgtbls, int num)
{
int i;
rt_err_t result;
RT_ASSERT(ppsSgtbls != NULL);
RT_ASSERT(num <= NU_PDMA_SG_TBL_MAXSIZE);
result = rt_mutex_take(g_mutex_sg, RT_WAITING_FOREVER);
RT_ASSERT(result == RT_EOK);
for (i = 0; i < num; i++)
{
if (ppsSgtbls[i] != NULL)
{
nu_pdma_sgtbls_token_free(ppsSgtbls[i]);
}
ppsSgtbls[i] = NULL;
}
result = rt_mutex_release(g_mutex_sg);
RT_ASSERT(result == RT_EOK);
}
static rt_err_t nu_pdma_sgtbls_valid(nu_pdma_desc_t head)
{
uint32_t node_addr;
nu_pdma_desc_t node = head;
do
{
node_addr = (uint32_t)node;
if ((node_addr < PDMA->SCATBA) || (node_addr - PDMA->SCATBA) >= NU_PDMA_SG_LIMITED_DISTANCE)
{
rt_kprintf("The distance is over %d between 0x%08x and 0x%08x. \n", NU_PDMA_SG_LIMITED_DISTANCE, PDMA->SCATBA, node);
rt_kprintf("Please use nu_pdma_sgtbl_allocate to allocate valid sg-table.\n");
return -RT_ERROR;
}
node = (nu_pdma_desc_t)(node->NEXT + PDMA->SCATBA);
}
while (((uint32_t)node != PDMA->SCATBA) && (node != head));
return RT_EOK;
}
static void _nu_pdma_transfer(int i32ChannID, uint32_t u32Peripheral, nu_pdma_desc_t head, uint32_t u32IdleTimeout_us)
{
PDMA_DisableTimeout(PDMA, 1 << i32ChannID);
PDMA_EnableInt(PDMA, i32ChannID, PDMA_INT_TRANS_DONE);
nu_pdma_timeout_set(i32ChannID, u32IdleTimeout_us);
/* Set scatter-gather mode and head */
PDMA_SetTransferMode(PDMA,
i32ChannID,
u32Peripheral,
(head->NEXT != 0) ? 1 : 0,
(uint32_t)head);
/* If peripheral is M2M, trigger it. */
if (u32Peripheral == PDMA_MEM)
PDMA_Trigger(PDMA, i32ChannID);
}
rt_err_t nu_pdma_transfer(int i32ChannID, uint32_t u32DataWidth, uint32_t u32AddrSrc, uint32_t u32AddrDst, int32_t i32TransferCnt, uint32_t u32IdleTimeout_us)
{
rt_err_t ret = -RT_EINVAL;
nu_pdma_periph_ctl_t *psPeriphCtl = NULL;
if (!(nu_pdma_chn_mask & (1 << i32ChannID)))
goto exit_nu_pdma_transfer;
psPeriphCtl = &nu_pdma_chn_arr[i32ChannID - NU_PDMA_CH_Pos].m_spPeripCtl;
ret = nu_pdma_desc_setup(i32ChannID,
&PDMA->DSCT[i32ChannID],
u32DataWidth,
u32AddrSrc,
u32AddrDst,
i32TransferCnt,
NULL);
if (ret != RT_EOK)
goto exit_nu_pdma_transfer;
_nu_pdma_transfer(i32ChannID, psPeriphCtl->m_u32Peripheral, &PDMA->DSCT[i32ChannID], u32IdleTimeout_us);
ret = RT_EOK;
exit_nu_pdma_transfer:
return -(ret);
}
rt_err_t nu_pdma_sg_transfer(int i32ChannID, nu_pdma_desc_t head, uint32_t u32IdleTimeout_us)
{
rt_err_t ret = -RT_EINVAL;
nu_pdma_periph_ctl_t *psPeriphCtl = NULL;
if (!head)
goto exit_nu_pdma_sg_transfer;
else if (!(nu_pdma_chn_mask & (1 << i32ChannID)))
goto exit_nu_pdma_sg_transfer;
else if ((ret = nu_pdma_sgtbls_valid(head)) != RT_EOK) /* Check SG-tbls. */
goto exit_nu_pdma_sg_transfer;
psPeriphCtl = &nu_pdma_chn_arr[i32ChannID - NU_PDMA_CH_Pos].m_spPeripCtl;
_nu_pdma_transfer(i32ChannID, psPeriphCtl->m_u32Peripheral, head, u32IdleTimeout_us);
ret = RT_EOK;
exit_nu_pdma_sg_transfer:
return -(ret);
}
void PDMA_IRQHandler(void)
{
int i;
/* enter interrupt */
rt_interrupt_enter();
uint32_t intsts = PDMA_GET_INT_STATUS(PDMA);
uint32_t abtsts = PDMA_GET_ABORT_STS(PDMA);
uint32_t tdsts = PDMA_GET_TD_STS(PDMA);
uint32_t reqto = intsts & (PDMA_INTSTS_REQTOF0_Msk | PDMA_INTSTS_REQTOF1_Msk);
uint32_t reqto_ch = ((reqto & PDMA_INTSTS_REQTOF0_Msk) ? (1 << 0) : 0x0) | ((reqto & PDMA_INTSTS_REQTOF1_Msk) ? (1 << 1) : 0x0);
int allch_sts = (reqto_ch | tdsts | abtsts);
// Abort
if (intsts & PDMA_INTSTS_ABTIF_Msk)
{
// Clear all Abort flags
PDMA_CLR_ABORT_FLAG(PDMA, abtsts);
}
// Transfer done
if (intsts & PDMA_INTSTS_TDIF_Msk)
{
// Clear all transfer done flags
PDMA_CLR_TD_FLAG(PDMA, tdsts);
}
// Timeout
if (reqto)
{
// Clear all Timeout flags
PDMA->INTSTS = reqto;
}
// Find the position of first '1' in allch_sts.
while ((i = nu_ctz(allch_sts)) != 32)
{
int ch_mask = (1 << i);
if (nu_pdma_chn_mask & ch_mask)
{
int ch_event = 0;
nu_pdma_chn_t *dma_chn = nu_pdma_chn_arr + i - NU_PDMA_CH_Pos;
if (dma_chn->m_pfnCBHandler)
{
if (abtsts & ch_mask)
{
ch_event |= NU_PDMA_EVENT_ABORT;
}
if (tdsts & ch_mask) ch_event |= NU_PDMA_EVENT_TRANSFER_DONE;
if (reqto_ch & ch_mask)
{
PDMA_DisableTimeout(PDMA, ch_mask);
ch_event |= NU_PDMA_EVENT_TIMEOUT;
}
if (dma_chn->m_u32EventFilter & ch_event)
dma_chn->m_pfnCBHandler(dma_chn->m_pvUserData, ch_event);
if (reqto_ch & ch_mask)
nu_pdma_timeout_set(i, nu_pdma_chn_arr[i - NU_PDMA_CH_Pos].m_u32IdleTimeout_us);
}//if(dma_chn->handler)
} //if (nu_pdma_chn_mask & ch_mask)
// Clear the served bit.
allch_sts &= ~ch_mask;
} //while
/* leave interrupt */
rt_interrupt_leave();
}
static void nu_pdma_memfun_actor_init(void)
{
int i = 0 ;
nu_pdma_init();
for (i = 0; i < NU_PDMA_MEMFUN_ACTOR_MAX; i++)
{
rt_memset(&nu_pdma_memfun_actor_arr[i], 0, sizeof(struct nu_pdma_memfun_actor));
if (-(RT_ERROR) != (nu_pdma_memfun_actor_arr[i].m_i32ChannID = nu_pdma_channel_allocate(PDMA_MEM)))
{
nu_pdma_memfun_actor_arr[i].m_psSemMemFun = rt_sem_create("memactor_sem", 0, RT_IPC_FLAG_FIFO);
RT_ASSERT(nu_pdma_memfun_actor_arr[i].m_psSemMemFun != RT_NULL);
}
else
break;
}
if (i)
{
nu_pdma_memfun_actor_maxnum = i;
nu_pdma_memfun_actor_mask = ~(((1 << i) - 1));
nu_pdma_memfun_actor_pool_sem = rt_sem_create("mempool_sem", nu_pdma_memfun_actor_maxnum, RT_IPC_FLAG_FIFO);
RT_ASSERT(nu_pdma_memfun_actor_pool_sem != RT_NULL);
nu_pdma_memfun_actor_pool_lock = rt_mutex_create("mempool_lock", RT_IPC_FLAG_PRIO);
RT_ASSERT(nu_pdma_memfun_actor_pool_lock != RT_NULL);
}
}
static void nu_pdma_memfun_cb(void *pvUserData, uint32_t u32Events)
{
rt_err_t result;
nu_pdma_memfun_actor_t psMemFunActor = (nu_pdma_memfun_actor_t)pvUserData;
psMemFunActor->m_u32Result = u32Events;
result = rt_sem_release(psMemFunActor->m_psSemMemFun);
RT_ASSERT(result == RT_EOK);
}
static int nu_pdma_memfun_employ(void)
{
int idx = -1 ;
/* Headhunter */
if (nu_pdma_memfun_actor_pool_sem && (rt_sem_take(nu_pdma_memfun_actor_pool_sem, RT_WAITING_FOREVER) == RT_EOK))
{
rt_err_t result;
result = rt_mutex_take(nu_pdma_memfun_actor_pool_lock, RT_WAITING_FOREVER);
RT_ASSERT(result == RT_EOK);
/* Find the position of first '0' in nu_pdma_memfun_actor_mask. */
idx = nu_cto(nu_pdma_memfun_actor_mask);
if (idx != 32)
{
nu_pdma_memfun_actor_mask |= (1 << idx);
}
else
{
idx = -1;
}
result = rt_mutex_release(nu_pdma_memfun_actor_pool_lock);
RT_ASSERT(result == RT_EOK);
}
return idx;
}
static rt_ssize_t nu_pdma_memfun(void *dest, void *src, uint32_t u32DataWidth, unsigned int u32TransferCnt, nu_pdma_memctrl_t eMemCtl)
{
nu_pdma_memfun_actor_t psMemFunActor = NULL;
int idx;
rt_size_t ret = 0;
rt_uint32_t u32Offset = 0;
rt_uint32_t u32TxCnt = 0;
while (1)
{
rt_err_t result;
/* Employ actor */
if ((idx = nu_pdma_memfun_employ()) < 0)
continue;
psMemFunActor = &nu_pdma_memfun_actor_arr[idx];
do
{
u32TxCnt = (u32TransferCnt > NU_PDMA_MAX_TXCNT) ? NU_PDMA_MAX_TXCNT : u32TransferCnt;
/* Set PDMA memory control to eMemCtl. */
nu_pdma_channel_memctrl_set(psMemFunActor->m_i32ChannID, eMemCtl);
/* Register ISR callback function */
nu_pdma_callback_register(psMemFunActor->m_i32ChannID, nu_pdma_memfun_cb, (void *)psMemFunActor, NU_PDMA_EVENT_ABORT | NU_PDMA_EVENT_TRANSFER_DONE);
psMemFunActor->m_u32Result = 0;
/* Trigger it */
nu_pdma_transfer(psMemFunActor->m_i32ChannID,
u32DataWidth,
(eMemCtl & 0x2ul) ? (uint32_t)src + u32Offset : (uint32_t)src, /* Src address is Inc or not. */
(eMemCtl & 0x1ul) ? (uint32_t)dest + u32Offset : (uint32_t)dest, /* Dst address is Inc or not. */
u32TxCnt,
0);
/* Wait it done. */
result = rt_sem_take(psMemFunActor->m_psSemMemFun, RT_WAITING_FOREVER);
RT_ASSERT(result == RT_EOK);
/* Give result if get NU_PDMA_EVENT_TRANSFER_DONE.*/
if (psMemFunActor->m_u32Result & NU_PDMA_EVENT_TRANSFER_DONE)
{
ret += u32TxCnt;
}
else
{
ret += (u32TxCnt - nu_pdma_non_transfer_count_get(psMemFunActor->m_i32ChannID));
}
/* Terminate it if get ABORT event */
if (psMemFunActor->m_u32Result & NU_PDMA_EVENT_ABORT)
{
nu_pdma_channel_terminate(psMemFunActor->m_i32ChannID);
break;
}
u32TransferCnt -= u32TxCnt;
u32Offset += u32TxCnt * (u32DataWidth / 8);
}
while (u32TransferCnt > 0);
result = rt_mutex_take(nu_pdma_memfun_actor_pool_lock, RT_WAITING_FOREVER);
RT_ASSERT(result == RT_EOK);
nu_pdma_memfun_actor_mask &= ~(1 << idx);
result = rt_mutex_release(nu_pdma_memfun_actor_pool_lock);
RT_ASSERT(result == RT_EOK);
/* Fire actor */
result = rt_sem_release(nu_pdma_memfun_actor_pool_sem);
RT_ASSERT(result == RT_EOK);
break;
}
return ret;
}
rt_size_t nu_pdma_mempush(void *dest, void *src, uint32_t data_width, unsigned int transfer_count)
{
if (data_width == 8 || data_width == 16 || data_width == 32)
return nu_pdma_memfun(dest, src, data_width, transfer_count, eMemCtl_SrcInc_DstFix);
return 0;
}
void *nu_pdma_memcpy(void *dest, void *src, unsigned int count)
{
int i = 0;
uint32_t u32Offset = 0;
uint32_t u32Remaining = count;
for (i = 4; (i > 0) && (u32Remaining > 0) ; i >>= 1)
{
uint32_t u32src = (uint32_t)src + u32Offset;
uint32_t u32dest = (uint32_t)dest + u32Offset;
if (((u32src % i) == (u32dest % i)) &&
((u32src % i) == 0) &&
(RT_ALIGN_DOWN(u32Remaining, i) >= i))
{
uint32_t u32TXCnt = u32Remaining / i;
if (u32TXCnt != nu_pdma_memfun((void *)u32dest, (void *)u32src, i * 8, u32TXCnt, eMemCtl_SrcInc_DstInc))
goto exit_nu_pdma_memcpy;
u32Offset += (u32TXCnt * i);
u32Remaining -= (u32TXCnt * i);
}
}
if (count == u32Offset)
return dest;
exit_nu_pdma_memcpy:
return NULL;
}
/**
* PDMA memfun actor initialization
*/
int rt_hw_pdma_memfun_init(void)
{
nu_pdma_memfun_actor_init();
return 0;
}
INIT_DEVICE_EXPORT(rt_hw_pdma_memfun_init);
#endif // #if defined(BSP_USING_PDMA)
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