diff options
Diffstat (limited to 'watch-library/hpl/dmac/hpl_dmac.c')
| -rw-r--r-- | watch-library/hpl/dmac/hpl_dmac.c | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/watch-library/hpl/dmac/hpl_dmac.c b/watch-library/hpl/dmac/hpl_dmac.c new file mode 100644 index 00000000..c12e0254 --- /dev/null +++ b/watch-library/hpl/dmac/hpl_dmac.c @@ -0,0 +1,244 @@ + +/** + * \file + * + * \brief Generic DMAC related functionality. + * + * Copyright (c) 2016-2019 Microchip Technology Inc. and its subsidiaries. + * + * \asf_license_start + * + * \page License + * + * Subject to your compliance with these terms, you may use Microchip + * software and any derivatives exclusively with Microchip products. + * It is your responsibility to comply with third party license terms applicable + * to your use of third party software (including open source software) that + * may accompany Microchip software. + * + * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES, + * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE, + * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY, + * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE + * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL + * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE + * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE + * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO THE FULLEST EXTENT + * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY + * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY, + * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE. + * + * \asf_license_stop + * + */ +#include <compiler.h> +#include <hpl_dma.h> +#include <hpl_dmac_config.h> +#include <utils.h> +#include <utils_assert.h> +#include <utils_repeat_macro.h> + +#if CONF_DMAC_ENABLE + +/* Section containing first descriptors for all DMAC channels */ +COMPILER_ALIGNED(16) +DmacDescriptor _descriptor_section[DMAC_CH_NUM] SECTION_DMAC_DESCRIPTOR; + +/* Section containing current descriptors for all DMAC channels */ +COMPILER_ALIGNED(16) +DmacDescriptor _write_back_section[DMAC_CH_NUM] SECTION_DMAC_DESCRIPTOR; + +/* Array containing callbacks for DMAC channels */ +static struct _dma_resource _resources[DMAC_CH_NUM]; + +/* This macro DMAC configuration */ +#define DMAC_CHANNEL_CFG(i, n) \ + {(CONF_DMAC_RUNSTDBY_##n << DMAC_CHCTRLA_RUNSTDBY_Pos) | (CONF_DMAC_ENABLE_##n << DMAC_CHCTRLA_ENABLE_Pos), \ + DMAC_CHCTRLB_TRIGACT(CONF_DMAC_TRIGACT_##n) | DMAC_CHCTRLB_TRIGSRC(CONF_DMAC_TRIGSRC_##n) \ + | DMAC_CHCTRLB_LVL(CONF_DMAC_LVL_##n) | (CONF_DMAC_EVOE_##n << DMAC_CHCTRLB_EVOE_Pos) \ + | (CONF_DMAC_EVIE_##n << DMAC_CHCTRLB_EVIE_Pos) | DMAC_CHCTRLB_EVACT(CONF_DMAC_EVACT_##n), \ + DMAC_BTCTRL_STEPSIZE(CONF_DMAC_STEPSIZE_##n) | (CONF_DMAC_STEPSEL_##n << DMAC_BTCTRL_STEPSEL_Pos) \ + | (CONF_DMAC_DSTINC_##n << DMAC_BTCTRL_DSTINC_Pos) | (CONF_DMAC_SRCINC_##n << DMAC_BTCTRL_SRCINC_Pos) \ + | DMAC_BTCTRL_BEATSIZE(CONF_DMAC_BEATSIZE_##n) | DMAC_BTCTRL_BLOCKACT(CONF_DMAC_BLOCKACT_##n) \ + | DMAC_BTCTRL_EVOSEL(CONF_DMAC_EVOSEL_##n)}, + +/* DMAC channel configuration */ +struct dmac_channel_cfg { + uint8_t ctrla; + uint32_t ctrlb; + uint16_t btctrl; +}; + +/* DMAC channel configurations */ +const static struct dmac_channel_cfg _cfgs[] = {REPEAT_MACRO(DMAC_CHANNEL_CFG, i, DMAC_CH_NUM)}; + +/** + * \brief Initialize DMAC + */ +int32_t _dma_init(void) +{ + uint8_t i = 0; + + hri_dmac_clear_CTRL_DMAENABLE_bit(DMAC); + hri_dmac_clear_CTRL_CRCENABLE_bit(DMAC); + hri_dmac_set_CHCTRLA_SWRST_bit(DMAC); + + hri_dmac_write_CTRL_reg(DMAC, + (CONF_DMAC_LVLEN0 << DMAC_CTRL_LVLEN0_Pos) | (CONF_DMAC_LVLEN1 << DMAC_CTRL_LVLEN1_Pos) + | (CONF_DMAC_LVLEN2 << DMAC_CTRL_LVLEN2_Pos) + | (CONF_DMAC_LVLEN3 << DMAC_CTRL_LVLEN3_Pos)); + hri_dmac_write_DBGCTRL_DBGRUN_bit(DMAC, CONF_DMAC_DBGRUN); + + hri_dmac_write_QOSCTRL_reg(DMAC, + DMAC_QOSCTRL_WRBQOS(CONF_DMAC_WRBQOS) | DMAC_QOSCTRL_FQOS(CONF_DMAC_FQOS) + | DMAC_QOSCTRL_DQOS(CONF_DMAC_DQOS)); + + hri_dmac_write_PRICTRL0_reg( + DMAC, + DMAC_PRICTRL0_LVLPRI0(CONF_DMAC_LVLPRI0) | DMAC_PRICTRL0_LVLPRI1(CONF_DMAC_LVLPRI1) + | DMAC_PRICTRL0_LVLPRI2(CONF_DMAC_LVLPRI2) | DMAC_PRICTRL0_LVLPRI3(CONF_DMAC_LVLPRI3) + | (CONF_DMAC_RRLVLEN0 << DMAC_PRICTRL0_RRLVLEN0_Pos) | (CONF_DMAC_RRLVLEN1 << DMAC_PRICTRL0_RRLVLEN1_Pos) + | (CONF_DMAC_RRLVLEN2 << DMAC_PRICTRL0_RRLVLEN2_Pos) | (CONF_DMAC_RRLVLEN3 << DMAC_PRICTRL0_RRLVLEN3_Pos)); + hri_dmac_write_BASEADDR_reg(DMAC, (uint32_t)_descriptor_section); + hri_dmac_write_WRBADDR_reg(DMAC, (uint32_t)_write_back_section); + + for (; i < DMAC_CH_NUM; i++) { + hri_dmac_write_CHID_reg(DMAC, i); + + hri_dmac_write_CHCTRLA_RUNSTDBY_bit(DMAC, _cfgs[i].ctrla & DMAC_CHCTRLA_RUNSTDBY); + + hri_dmac_write_CHCTRLB_reg(DMAC, _cfgs[i].ctrlb); + hri_dmacdescriptor_write_BTCTRL_reg(&_descriptor_section[i], _cfgs[i].btctrl); + hri_dmacdescriptor_write_DESCADDR_reg(&_descriptor_section[i], 0x0); + } + + NVIC_DisableIRQ(DMAC_IRQn); + NVIC_ClearPendingIRQ(DMAC_IRQn); + NVIC_EnableIRQ(DMAC_IRQn); + + hri_dmac_set_CTRL_DMAENABLE_bit(DMAC); + + return ERR_NONE; +} + +/** + * \brief Enable/disable DMA interrupt + */ +void _dma_set_irq_state(const uint8_t channel, const enum _dma_callback_type type, const bool state) +{ + hri_dmac_write_CHID_reg(DMAC, channel); + + if (DMA_TRANSFER_COMPLETE_CB == type) { + hri_dmac_write_CHINTEN_TCMPL_bit(DMAC, state); + } else if (DMA_TRANSFER_ERROR_CB == type) { + hri_dmac_write_CHINTEN_TERR_bit(DMAC, state); + } +} + +int32_t _dma_set_destination_address(const uint8_t channel, const void *const dst) +{ + hri_dmacdescriptor_write_DSTADDR_reg(&_descriptor_section[channel], (uint32_t)dst); + + return ERR_NONE; +} + +int32_t _dma_set_source_address(const uint8_t channel, const void *const src) +{ + hri_dmacdescriptor_write_SRCADDR_reg(&_descriptor_section[channel], (uint32_t)src); + + return ERR_NONE; +} + +int32_t _dma_set_next_descriptor(const uint8_t current_channel, const uint8_t next_channel) +{ + hri_dmacdescriptor_write_DESCADDR_reg(&_descriptor_section[current_channel], + (uint32_t)&_descriptor_section[next_channel]); + + return ERR_NONE; +} + +int32_t _dma_srcinc_enable(const uint8_t channel, const bool enable) +{ + hri_dmacdescriptor_write_BTCTRL_SRCINC_bit(&_descriptor_section[channel], enable); + + return ERR_NONE; +} + +int32_t _dma_set_data_amount(const uint8_t channel, const uint32_t amount) +{ + uint32_t address = hri_dmacdescriptor_read_DSTADDR_reg(&_descriptor_section[channel]); + uint8_t beat_size = hri_dmacdescriptor_read_BTCTRL_BEATSIZE_bf(&_descriptor_section[channel]); + + if (hri_dmacdescriptor_get_BTCTRL_DSTINC_bit(&_descriptor_section[channel])) { + hri_dmacdescriptor_write_DSTADDR_reg(&_descriptor_section[channel], address + amount * (1 << beat_size)); + } + + address = hri_dmacdescriptor_read_SRCADDR_reg(&_descriptor_section[channel]); + + if (hri_dmacdescriptor_get_BTCTRL_SRCINC_bit(&_descriptor_section[channel])) { + hri_dmacdescriptor_write_SRCADDR_reg(&_descriptor_section[channel], address + amount * (1 << beat_size)); + } + + hri_dmacdescriptor_write_BTCNT_reg(&_descriptor_section[channel], amount); + + return ERR_NONE; +} + +int32_t _dma_enable_transaction(const uint8_t channel, const bool software_trigger) +{ + hri_dmac_write_CHID_reg(DMAC, channel); + hri_dmacdescriptor_set_BTCTRL_VALID_bit(&_descriptor_section[channel]); + hri_dmac_set_CHCTRLA_ENABLE_bit(DMAC); + if (software_trigger) { + hri_dmac_set_SWTRIGCTRL_reg(DMAC, 1 << channel); + } + + return ERR_NONE; +} + +int32_t _dma_get_channel_resource(struct _dma_resource **resource, const uint8_t channel) +{ + *resource = &_resources[channel]; + + return ERR_NONE; +} + +int32_t _dma_dstinc_enable(const uint8_t channel, const bool enable) +{ + hri_dmacdescriptor_write_BTCTRL_DSTINC_bit(&_descriptor_section[channel], enable); + + return ERR_NONE; +} + +/** + * \internal DMAC interrupt handler + */ +static inline void _dmac_handler(void) +{ + uint8_t channel = hri_dmac_read_INTPEND_ID_bf(DMAC); + uint8_t current_channel = hri_dmac_read_CHID_reg(DMAC); + uint8_t flag_status; + struct _dma_resource *tmp_resource = &_resources[channel]; + + hri_dmac_write_CHID_reg(DMAC, channel); + flag_status = hri_dmac_get_CHINTFLAG_reg(DMAC, DMAC_CHINTFLAG_MASK); + + if (flag_status & DMAC_CHINTFLAG_TERR) { + hri_dmac_clear_CHINTFLAG_TERR_bit(DMAC); + tmp_resource->dma_cb.error(tmp_resource); + } else if (flag_status & DMAC_CHINTFLAG_TCMPL) { + hri_dmac_clear_CHINTFLAG_TCMPL_bit(DMAC); + tmp_resource->dma_cb.transfer_done(tmp_resource); + } + hri_dmac_write_CHID_reg(DMAC, current_channel); +} + +/** + * \brief DMAC interrupt handler + */ +void DMAC_Handler(void) +{ + _dmac_handler(); +} + +#endif /* CONF_DMAC_ENABLE */ |