/**
* @file
*
* @ingroup mpc55xx
*
* @brief Enhanced Direct Memory Access (eDMA).
*/
/*
* Copyright (c) 2008-2013 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Dornierstr. 4
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#ifndef LIBCPU_POWERPC_MPC55XX_EDMA_H
#define LIBCPU_POWERPC_MPC55XX_EDMA_H
#include <mpc55xx/regs.h>
#include <rtems.h>
#include <rtems/chain.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#if MPC55XX_CHIP_FAMILY == 551
#define EDMA_CHANNEL_COUNT 16U
#elif MPC55XX_CHIP_FAMILY == 564
#define EDMA_CHANNEL_COUNT 16U
#elif MPC55XX_CHIP_FAMILY == 567
#define EDMA_CHANNEL_COUNT 96U
#else
#define EDMA_CHANNEL_COUNT 64U
#endif
#define EDMA_MODULE_COUNT ((EDMA_CHANNEL_COUNT + 63U) / 64U)
#define EDMA_CHANNELS_PER_MODULE 64U
#if EDMA_MODULE_COUNT == 1
#define EDMA_TCD_BY_CHANNEL_INDEX(channel_index) \
(&EDMA.TCD[(channel_index)])
#elif EDMA_MODULE_COUNT == 2
#define EDMA_TCD_BY_CHANNEL_INDEX(channel_index) \
((channel_index) < EDMA_CHANNELS_PER_MODULE ? \
&EDMA_A.TCD[(channel_index)] \
: &EDMA_B.TCD[(channel_index) - EDMA_CHANNELS_PER_MODULE])
#else
#error "unsupported module count"
#endif
/* FIXME: These values are only valid for the MPC5566 and MPC5674F */
typedef enum {
EDMA_EQADC_A_FISR0_CFFF0 = 0,
EDMA_EQADC_A_FISR0_RFDF0 = 1,
EDMA_EQADC_A_FISR1_CFFF1 = 2,
EDMA_EQADC_A_FISR1_RFDF1 = 3,
EDMA_EQADC_A_FISR2_CFFF2 = 4,
EDMA_EQADC_A_FISR2_RFDF2 = 5,
EDMA_EQADC_A_FISR3_CFFF3 = 6,
EDMA_EQADC_A_FISR3_RFDF3 = 7,
EDMA_EQADC_A_FISR4_CFFF4 = 8,
EDMA_EQADC_A_FISR4_RFDF4 = 9,
EDMA_EQADC_A_FISR5_CFFF5 = 10,
EDMA_EQADC_A_FISR5_RFDF5 = 11,
EDMA_DSPI_B_SR_TFFF = 12,
EDMA_DSPI_B_SR_RFDF = 13,
EDMA_DSPI_C_SR_TFFF = 14,
EDMA_DSPI_C_SR_RFDF = 15,
EDMA_DSPI_D_SR_TFFF = 16,
EDMA_DSPI_D_SR_RFDF = 17,
EDMA_ESCI_A_COMBTX = 18,
EDMA_ESCI_A_COMBRX = 19,
EDMA_EMIOS_GFR_F0 = 20,
EDMA_EMIOS_GFR_F1 = 21,
EDMA_EMIOS_GFR_F2 = 22,
EDMA_EMIOS_GFR_F3 = 23,
EDMA_EMIOS_GFR_F4 = 24,
EDMA_EMIOS_GFR_F8 = 25,
EDMA_EMIOS_GFR_F9 = 26,
EDMA_ETPU_CDTRSR_A_DTRS0 = 27,
EDMA_ETPU_CDTRSR_A_DTRS1 = 28,
EDMA_ETPU_CDTRSR_A_DTRS2 = 29,
EDMA_ETPU_CDTRSR_A_DTRS14 = 30,
EDMA_ETPU_CDTRSR_A_DTRS15 = 31,
EDMA_DSPI_A_SR_TFFF = 32,
EDMA_DSPI_A_SR_RFDF = 33,
EDMA_ESCI_B_COMBTX = 34,
EDMA_ESCI_B_COMBRX = 35,
EDMA_EMIOS_GFR_F6 = 36,
EDMA_EMIOS_GFR_F7 = 37,
EDMA_EMIOS_GFR_F10 = 38,
EDMA_EMIOS_GFR_F11 = 39,
EDMA_EMIOS_GFR_F16 = 40,
EDMA_EMIOS_GFR_F17 = 41,
EDMA_EMIOS_GFR_F18 = 42,
EDMA_EMIOS_GFR_F19 = 43,
EDMA_ETPU_CDTRSR_A_DTRS12 = 44,
EDMA_ETPU_CDTRSR_A_DTRS13 = 45,
EDMA_ETPU_CDTRSR_A_DTRS28 = 46,
EDMA_ETPU_CDTRSR_A_DTRS29 = 47,
EDMA_SIU_EISR_EIF0 = 48,
EDMA_SIU_EISR_EIF1 = 49,
EDMA_SIU_EISR_EIF2 = 50,
EDMA_SIU_EISR_EIF3 = 51,
EDMA_ETPU_CDTRSR_B_DTRS0 = 52,
EDMA_ETPU_CDTRSR_B_DTRS1 = 53,
EDMA_ETPU_CDTRSR_B_DTRS2 = 54,
EDMA_ETPU_CDTRSR_B_DTRS3 = 55,
EDMA_ETPU_CDTRSR_B_DTRS12 = 56,
EDMA_ETPU_CDTRSR_B_DTRS13 = 57,
EDMA_ETPU_CDTRSR_B_DTRS14 = 58,
EDMA_ETPU_CDTRSR_B_DTRS15 = 59,
EDMA_ETPU_CDTRSR_B_DTRS28 = 60,
EDMA_ETPU_CDTRSR_B_DTRS29 = 61,
EDMA_ETPU_CDTRSR_B_DTRS30 = 62,
EDMA_ETPU_CDTRSR_B_DTRS31 = 63
#if MPC55XX_CHIP_FAMILY == 567
,
EDMA_EQADC_B_FISR0_CFFF0 = 64 + 0,
EDMA_EQADC_B_FISR0_RFDF0 = 64 + 1,
EDMA_EQADC_B_FISR1_CFFF1 = 64 + 2,
EDMA_EQADC_B_FISR1_RFDF1 = 64 + 3,
EDMA_EQADC_B_FISR2_CFFF2 = 64 + 4,
EDMA_EQADC_B_FISR2_RFDF2 = 64 + 5,
EDMA_EQADC_B_FISR3_CFFF3 = 64 + 6,
EDMA_EQADC_B_FISR3_RFDF3 = 64 + 7,
EDMA_EQADC_B_FISR4_CFFF4 = 64 + 8,
EDMA_EQADC_B_FISR4_RFDF4 = 64 + 9,
EDMA_EQADC_B_FISR5_CFFF5 = 64 + 10,
EDMA_EQADC_B_FISR5_RFDF5 = 64 + 11,
EDMA_DECFILTER_A_IB = 64 + 12,
EDMA_DECFILTER_A_OB = 64 + 13,
EDMA_DECFILTER_B_IB = 64 + 14,
EDMA_DECFILTER_B_OB = 64 + 15,
EDMA_DECFILTER_C_IB = 64 + 16,
EDMA_DECFILTER_C_OB = 64 + 17,
EDMA_DECFILTER_D_IB = 64 + 18,
EDMA_DECFILTER_D_OB = 64 + 19,
EDMA_DECFILTER_E_IB = 64 + 20,
EDMA_DECFILTER_E_OB = 64 + 21,
EDMA_DECFILTER_F_IB = 64 + 22,
EDMA_DECFILTER_F_OB = 64 + 23,
EDMA_DECFILTER_G_IB = 64 + 24,
EDMA_DECFILTER_G_OB = 64 + 25,
EDMA_DECFILTER_H_IB = 64 + 26,
EDMA_DECFILTER_H_OB = 64 + 27
#endif
} edma_channel;
typedef struct edma_channel_context {
rtems_chain_node node;
volatile struct tcd_t *edma_tcd;
void (*done)(struct edma_channel_context *, uint32_t);
} edma_channel_context;
void mpc55xx_edma_init(void);
/**
* @brief Obtains an eDMA channel.
*
* @retval RTEMS_SUCCESSFUL Successful operation.
* @retval RTEMS_RESOURCE_IN_USE The channel is already in use.
*/
rtems_status_code mpc55xx_edma_obtain_channel_by_tcd(
volatile struct tcd_t *edma_tcd
);
void mpc55xx_edma_release_channel_by_tcd(volatile struct tcd_t *edma_tcd);
/**
* @brief Obtains an eDMA channel and registers the channel context.
*
* The done handler of the channel context will be called
* - during minor or major loop completions if interrupts are enabled in the
* corresponding TCD, or
* - in case a channel error occurs.
*
* An error status value not equal to zero indicates an error.
*
* @retval RTEMS_SUCCESSFUL Successful operation.
* @retval RTEMS_RESOURCE_IN_USE The channel is already in use.
* @retval RTEMS_IO_ERROR Unable to install interrupt handler for this channel.
*/
rtems_status_code mpc55xx_edma_obtain_channel(
edma_channel_context *ctx,
unsigned irq_priority
);
void mpc55xx_edma_release_channel(edma_channel_context *ctx);
/**
* @brief Copies a source TCD to an eDMA TCD.
*
* The DONE flag of the eDMA TCD is cleared before the actual copy operation.
* This enables the setting of channel link or scatter/gather options.
*
* This function can be used to start the channel if the START flags is
* set in the source TCD.
*/
void mpc55xx_edma_copy(
volatile struct tcd_t *edma_tcd,
const struct tcd_t *source_tcd
);
/**
* @brief Copies a source TCD to an eDMA TCD and enables hardware requests.
*
* The DONE flag of the eDMA TCD is cleared before the actual copy operation.
* This enables the setting of channel link or scatter/gather options.
*/
void mpc55xx_edma_copy_and_enable_hardware_requests(
volatile struct tcd_t *edma_tcd,
const struct tcd_t *source_tcd
);
void mpc55xx_edma_sg_link(
volatile struct tcd_t *edma_tcd,
const struct tcd_t *source_tcd
);
static inline volatile struct EDMA_tag *mpc55xx_edma_by_tcd(
volatile struct tcd_t *edma_tcd
)
{
return (volatile struct EDMA_tag *)
((uintptr_t) edma_tcd & ~(uintptr_t) 0x1fff);
}
static inline unsigned mpc55xx_edma_channel_by_tcd(
volatile struct tcd_t *edma_tcd
)
{
volatile struct EDMA_tag *edma = mpc55xx_edma_by_tcd(edma_tcd);
return edma_tcd - &edma->TCD[0];
}
static inline void mpc55xx_edma_enable_hardware_requests(
volatile struct tcd_t *edma_tcd
)
{
volatile struct EDMA_tag *edma = mpc55xx_edma_by_tcd(edma_tcd);
unsigned channel = edma_tcd - &edma->TCD[0];
edma->SERQR.R = (uint8_t) channel;
}
static inline void mpc55xx_edma_disable_hardware_requests(
volatile struct tcd_t *edma_tcd
)
{
volatile struct EDMA_tag *edma = mpc55xx_edma_by_tcd(edma_tcd);
unsigned channel = edma_tcd - &edma->TCD[0];
edma->CERQR.R = (uint8_t) channel;
}
static inline void mpc55xx_edma_enable_error_interrupts(
volatile struct tcd_t *edma_tcd
)
{
volatile struct EDMA_tag *edma = mpc55xx_edma_by_tcd(edma_tcd);
unsigned channel = edma_tcd - &edma->TCD[0];
edma->SEEIR.R = (uint8_t) channel;
}
static inline void mpc55xx_edma_disable_error_interrupts(
volatile struct tcd_t *edma_tcd
)
{
volatile struct EDMA_tag *edma = mpc55xx_edma_by_tcd(edma_tcd);
unsigned channel = edma_tcd - &edma->TCD[0];
edma->CEEIR.R = (uint8_t) channel;
}
static inline void mpc55xx_edma_set_start(
volatile struct tcd_t *edma_tcd
)
{
volatile struct EDMA_tag *edma = mpc55xx_edma_by_tcd(edma_tcd);
unsigned channel = edma_tcd - &edma->TCD[0];
edma->SSBR.R = (uint8_t) channel;
}
static inline void mpc55xx_edma_clear_done(
volatile struct tcd_t *edma_tcd
)
{
volatile struct EDMA_tag *edma = mpc55xx_edma_by_tcd(edma_tcd);
unsigned channel = edma_tcd - &edma->TCD[0];
edma->CDSBR.R = (uint8_t) channel;
}
static inline void mpc55xx_edma_clear_interrupts(
volatile struct tcd_t *edma_tcd
)
{
volatile struct EDMA_tag *edma = mpc55xx_edma_by_tcd(edma_tcd);
unsigned channel = edma_tcd - &edma->TCD[0];
edma->CIRQR.R = (uint8_t) channel;
}
static inline bool mpc55xx_edma_is_done(
volatile struct tcd_t *edma_tcd
)
{
return edma_tcd->BMF.B.DONE;
}
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* LIBCPU_POWERPC_MPC55XX_EDMA_H */
