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targets/TARGET_NUVOTON/TARGET_NANO100/dma_api.c@182:57724642e740, 2018-02-16 (annotated)

Committer:
AnnaBridge
Date:
Fri Feb 16 16:09:33 2018 +0000
Revision:
182:57724642e740
Parent:
175:b96e65c34a4d 
mbed-dev library. Release version 159.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AnnaBridge 175:b96e65c34a4d 1 /* mbed Microcontroller Library
AnnaBridge 175:b96e65c34a4d 2 * Copyright (c) 2015-2017 Nuvoton
AnnaBridge 175:b96e65c34a4d 3 *
AnnaBridge 175:b96e65c34a4d 4 * Licensed under the Apache License, Version 2.0 (the "License");
AnnaBridge 175:b96e65c34a4d 5 * you may not use this file except in compliance with the License.
AnnaBridge 175:b96e65c34a4d 6 * You may obtain a copy of the License at
AnnaBridge 175:b96e65c34a4d 7 *
AnnaBridge 175:b96e65c34a4d 8 * http://www.apache.org/licenses/LICENSE-2.0
AnnaBridge 175:b96e65c34a4d 9 *
AnnaBridge 175:b96e65c34a4d 10 * Unless required by applicable law or agreed to in writing, software
AnnaBridge 175:b96e65c34a4d 11 * distributed under the License is distributed on an "AS IS" BASIS,
AnnaBridge 175:b96e65c34a4d 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
AnnaBridge 175:b96e65c34a4d 13 * See the License for the specific language governing permissions and
AnnaBridge 175:b96e65c34a4d 14 * limitations under the License.
AnnaBridge 175:b96e65c34a4d 15 */
AnnaBridge 175:b96e65c34a4d 16
AnnaBridge 175:b96e65c34a4d 17 #include "dma_api.h"
AnnaBridge 175:b96e65c34a4d 18 #include "string.h"
AnnaBridge 175:b96e65c34a4d 19 #include "cmsis.h"
AnnaBridge 175:b96e65c34a4d 20 #include "mbed_assert.h"
AnnaBridge 175:b96e65c34a4d 21 #include "PeripheralNames.h"
AnnaBridge 175:b96e65c34a4d 22 #include "nu_modutil.h"
AnnaBridge 175:b96e65c34a4d 23 #include "nu_bitutil.h"
AnnaBridge 175:b96e65c34a4d 24 #include "dma.h"
AnnaBridge 175:b96e65c34a4d 25
AnnaBridge 175:b96e65c34a4d 26 #define NU_PDMA_CH_MAX 6 /* Specify maximum channels of PDMA */
AnnaBridge 175:b96e65c34a4d 27 #define NU_PDMA_CH_Pos 1 /* Specify first channel number of PDMA */
AnnaBridge 175:b96e65c34a4d 28 #define NU_PDMA_CH_Msk (((1 << NU_PDMA_CH_MAX) - 1) << NU_PDMA_CH_Pos)
AnnaBridge 175:b96e65c34a4d 29
AnnaBridge 175:b96e65c34a4d 30 struct nu_dma_chn_s {
AnnaBridge 175:b96e65c34a4d 31 void (*handler)(uint32_t, uint32_t);
AnnaBridge 175:b96e65c34a4d 32 uint32_t id;
AnnaBridge 175:b96e65c34a4d 33 uint32_t event;
AnnaBridge 175:b96e65c34a4d 34 };
AnnaBridge 175:b96e65c34a4d 35
AnnaBridge 175:b96e65c34a4d 36 static int dma_inited = 0;
AnnaBridge 175:b96e65c34a4d 37 static uint32_t dma_chn_mask = 0;
AnnaBridge 175:b96e65c34a4d 38 static struct nu_dma_chn_s dma_chn_arr[NU_PDMA_CH_MAX];
AnnaBridge 175:b96e65c34a4d 39 static const DMAName dmaname_chn_arr[NU_PDMA_CH_MAX] = {
AnnaBridge 175:b96e65c34a4d 40 // NOTE: DMA_0_0 for VDMA
AnnaBridge 175:b96e65c34a4d 41 DMA_1_0, DMA_2_0, DMA_3_0, DMA_4_0, DMA_5_0, DMA_6_0
AnnaBridge 175:b96e65c34a4d 42 };
AnnaBridge 175:b96e65c34a4d 43
AnnaBridge 175:b96e65c34a4d 44 void PDMA_IRQHandler(void);
AnnaBridge 175:b96e65c34a4d 45 static const struct nu_modinit_s dma_modinit = {DMAGCR_0, DMA_MODULE, 0, 0, DMA_RST, PDMA_IRQn, (void *) PDMA_IRQHandler};
AnnaBridge 175:b96e65c34a4d 46
AnnaBridge 175:b96e65c34a4d 47
AnnaBridge 175:b96e65c34a4d 48 void dma_init(void)
AnnaBridge 175:b96e65c34a4d 49 {
AnnaBridge 175:b96e65c34a4d 50 if (dma_inited) {
AnnaBridge 175:b96e65c34a4d 51 return;
AnnaBridge 175:b96e65c34a4d 52 }
AnnaBridge 175:b96e65c34a4d 53
AnnaBridge 175:b96e65c34a4d 54 dma_inited = 1;
AnnaBridge 175:b96e65c34a4d 55 dma_chn_mask = ~NU_PDMA_CH_Msk;
AnnaBridge 175:b96e65c34a4d 56 memset(dma_chn_arr, 0x00, sizeof (dma_chn_arr));
AnnaBridge 175:b96e65c34a4d 57
AnnaBridge 175:b96e65c34a4d 58 // Reset this module
AnnaBridge 175:b96e65c34a4d 59 SYS_ResetModule(dma_modinit.rsetidx);
AnnaBridge 175:b96e65c34a4d 60
AnnaBridge 175:b96e65c34a4d 61 // Enable IP clock
AnnaBridge 175:b96e65c34a4d 62 CLK_EnableModuleClock(dma_modinit.clkidx);
AnnaBridge 175:b96e65c34a4d 63
AnnaBridge 175:b96e65c34a4d 64 PDMA_Open(0);
AnnaBridge 175:b96e65c34a4d 65
AnnaBridge 175:b96e65c34a4d 66 NVIC_SetVector(dma_modinit.irq_n, (uint32_t) dma_modinit.var);
AnnaBridge 175:b96e65c34a4d 67 NVIC_EnableIRQ(dma_modinit.irq_n);
AnnaBridge 175:b96e65c34a4d 68 }
AnnaBridge 175:b96e65c34a4d 69
AnnaBridge 175:b96e65c34a4d 70 int dma_channel_allocate(uint32_t capabilities)
AnnaBridge 175:b96e65c34a4d 71 {
AnnaBridge 175:b96e65c34a4d 72 if (! dma_inited) {
AnnaBridge 175:b96e65c34a4d 73 dma_init();
AnnaBridge 175:b96e65c34a4d 74 }
AnnaBridge 175:b96e65c34a4d 75
AnnaBridge 175:b96e65c34a4d 76 int i = nu_cto(dma_chn_mask);
AnnaBridge 175:b96e65c34a4d 77 if (i != 32) {
AnnaBridge 175:b96e65c34a4d 78 dma_chn_mask |= 1 << i;
AnnaBridge 175:b96e65c34a4d 79 memset(dma_chn_arr + i - NU_PDMA_CH_Pos, 0x00, sizeof (struct nu_dma_chn_s));
AnnaBridge 175:b96e65c34a4d 80 return i;
AnnaBridge 175:b96e65c34a4d 81 }
AnnaBridge 175:b96e65c34a4d 82
AnnaBridge 175:b96e65c34a4d 83 // No channel available
AnnaBridge 175:b96e65c34a4d 84 return DMA_ERROR_OUT_OF_CHANNELS;
AnnaBridge 175:b96e65c34a4d 85 }
AnnaBridge 175:b96e65c34a4d 86
AnnaBridge 175:b96e65c34a4d 87 int dma_channel_free(int channelid)
AnnaBridge 175:b96e65c34a4d 88 {
AnnaBridge 175:b96e65c34a4d 89 if (channelid != DMA_ERROR_OUT_OF_CHANNELS) {
AnnaBridge 175:b96e65c34a4d 90 dma_chn_mask &= ~(1 << channelid);
AnnaBridge 175:b96e65c34a4d 91 }
AnnaBridge 175:b96e65c34a4d 92
AnnaBridge 175:b96e65c34a4d 93 return 0;
AnnaBridge 175:b96e65c34a4d 94 }
AnnaBridge 175:b96e65c34a4d 95
AnnaBridge 175:b96e65c34a4d 96 void dma_set_handler(int channelid, uint32_t handler, uint32_t id, uint32_t event)
AnnaBridge 175:b96e65c34a4d 97 {
AnnaBridge 175:b96e65c34a4d 98 MBED_ASSERT(dma_chn_mask & (1 << channelid));
AnnaBridge 175:b96e65c34a4d 99
AnnaBridge 175:b96e65c34a4d 100 dma_chn_arr[channelid - NU_PDMA_CH_Pos].handler = (void (*)(uint32_t, uint32_t)) handler;
AnnaBridge 175:b96e65c34a4d 101 dma_chn_arr[channelid - NU_PDMA_CH_Pos].id = id;
AnnaBridge 175:b96e65c34a4d 102 dma_chn_arr[channelid - NU_PDMA_CH_Pos].event = event;
AnnaBridge 175:b96e65c34a4d 103
AnnaBridge 175:b96e65c34a4d 104 // Set interrupt vector if someone has removed it.
AnnaBridge 175:b96e65c34a4d 105 NVIC_SetVector(dma_modinit.irq_n, (uint32_t) dma_modinit.var);
AnnaBridge 175:b96e65c34a4d 106 NVIC_EnableIRQ(dma_modinit.irq_n);
AnnaBridge 175:b96e65c34a4d 107 }
AnnaBridge 175:b96e65c34a4d 108
AnnaBridge 175:b96e65c34a4d 109 PDMA_T *dma_modbase(int channelid)
AnnaBridge 175:b96e65c34a4d 110 {
AnnaBridge 175:b96e65c34a4d 111 DMAName dma_name = dmaname_chn_arr[channelid - NU_PDMA_CH_Pos];
AnnaBridge 175:b96e65c34a4d 112 return (PDMA_T *) NU_MODBASE(dma_name);
AnnaBridge 175:b96e65c34a4d 113 }
AnnaBridge 175:b96e65c34a4d 114
AnnaBridge 175:b96e65c34a4d 115 void dma_enable(int channelid, int enable)
AnnaBridge 175:b96e65c34a4d 116 {
AnnaBridge 175:b96e65c34a4d 117 DMA_GCR_T *dmagcr_base = (DMA_GCR_T *) NU_MODBASE(dma_modinit.modname);
AnnaBridge 175:b96e65c34a4d 118 PDMA_T *pdma_base = dma_modbase(channelid);
AnnaBridge 175:b96e65c34a4d 119 uint32_t pos = channelid - NU_PDMA_CH_Pos + DMA_GCR_GCRCSR_CLK1_EN_Pos;
AnnaBridge 175:b96e65c34a4d 120
AnnaBridge 175:b96e65c34a4d 121 if (enable) {
AnnaBridge 175:b96e65c34a4d 122 dmagcr_base->GCRCSR |= 1 << pos; // Enable channel clock
AnnaBridge 175:b96e65c34a4d 123 pdma_base->CSR |= (PDMA_CSR_PDMACEN_Msk); // Enable channel
AnnaBridge 175:b96e65c34a4d 124 }
AnnaBridge 175:b96e65c34a4d 125 else {
AnnaBridge 175:b96e65c34a4d 126 dmagcr_base->GCRCSR &= ~(1 << pos); // Disable channel clock
AnnaBridge 175:b96e65c34a4d 127 pdma_base->CSR &= ~(PDMA_CSR_PDMACEN_Msk); // Disable channel
AnnaBridge 175:b96e65c34a4d 128 }
AnnaBridge 175:b96e65c34a4d 129 }
AnnaBridge 175:b96e65c34a4d 130
AnnaBridge 175:b96e65c34a4d 131 void PDMA_IRQHandler(void)
AnnaBridge 175:b96e65c34a4d 132 {
AnnaBridge 175:b96e65c34a4d 133 uint32_t intsts = PDMA_GET_INT_STATUS();
AnnaBridge 175:b96e65c34a4d 134 // Just interested in INTR1-INTR6
AnnaBridge 175:b96e65c34a4d 135 intsts &= ((NU_PDMA_CH_Msk >> NU_PDMA_CH_Pos) << DMA_GCR_GCRISR_INTR1_Pos);
AnnaBridge 175:b96e65c34a4d 136
AnnaBridge 175:b96e65c34a4d 137 while (intsts) {
AnnaBridge 175:b96e65c34a4d 138 int chn_id = nu_ctz(intsts) - DMA_GCR_GCRISR_INTR1_Pos + NU_PDMA_CH_Pos;
AnnaBridge 175:b96e65c34a4d 139 uint32_t intsts_chn = PDMA_GET_CH_INT_STS(chn_id);
AnnaBridge 175:b96e65c34a4d 140
AnnaBridge 175:b96e65c34a4d 141 if (dma_chn_mask & (1 << chn_id)) {
AnnaBridge 175:b96e65c34a4d 142 struct nu_dma_chn_s *dma_chn = dma_chn_arr + chn_id - NU_PDMA_CH_Pos;
AnnaBridge 175:b96e65c34a4d 143
AnnaBridge 175:b96e65c34a4d 144 // Abort
AnnaBridge 175:b96e65c34a4d 145 if (intsts_chn & PDMA_ISR_TABORT_IS_Msk) {
AnnaBridge 175:b96e65c34a4d 146 // Clear ABORT IF of the channel
AnnaBridge 175:b96e65c34a4d 147 PDMA_CLR_CH_INT_FLAG(chn_id, PDMA_ISR_TABORT_IS_Msk);
AnnaBridge 175:b96e65c34a4d 148
AnnaBridge 175:b96e65c34a4d 149 if (dma_chn->handler && (dma_chn->event & DMA_EVENT_ABORT)) {
AnnaBridge 175:b96e65c34a4d 150 dma_chn->handler(dma_chn->id, DMA_EVENT_ABORT);
AnnaBridge 175:b96e65c34a4d 151 }
AnnaBridge 175:b96e65c34a4d 152 }
AnnaBridge 175:b96e65c34a4d 153
AnnaBridge 175:b96e65c34a4d 154 // Transfer done
AnnaBridge 175:b96e65c34a4d 155 if (intsts_chn & PDMA_ISR_TD_IS_Msk) {
AnnaBridge 175:b96e65c34a4d 156 // Clear TD IF of the channel
AnnaBridge 175:b96e65c34a4d 157 PDMA_CLR_CH_INT_FLAG(chn_id, PDMA_ISR_TD_IS_Msk);
AnnaBridge 175:b96e65c34a4d 158
AnnaBridge 175:b96e65c34a4d 159 if (dma_chn->handler && (dma_chn->event & DMA_EVENT_TRANSFER_DONE)) {
AnnaBridge 175:b96e65c34a4d 160 dma_chn->handler(dma_chn->id, DMA_EVENT_TRANSFER_DONE);
AnnaBridge 175:b96e65c34a4d 161 }
AnnaBridge 175:b96e65c34a4d 162 }
AnnaBridge 175:b96e65c34a4d 163
AnnaBridge 175:b96e65c34a4d 164 // Timeout
AnnaBridge 175:b96e65c34a4d 165 if (intsts_chn & PDMA_ISR_TO_IS_Msk) {
AnnaBridge 175:b96e65c34a4d 166 // Clear TIMEOUT IF of the channel
AnnaBridge 175:b96e65c34a4d 167 PDMA_CLR_CH_INT_FLAG(chn_id, PDMA_ISR_TO_IS_Msk);
AnnaBridge 175:b96e65c34a4d 168
AnnaBridge 175:b96e65c34a4d 169 if (dma_chn->handler && (dma_chn->event & DMA_EVENT_TIMEOUT)) {
AnnaBridge 175:b96e65c34a4d 170 dma_chn->handler(dma_chn->id, DMA_EVENT_TIMEOUT);
AnnaBridge 175:b96e65c34a4d 171 }
AnnaBridge 175:b96e65c34a4d 172 }
AnnaBridge 175:b96e65c34a4d 173 }
AnnaBridge 175:b96e65c34a4d 174
AnnaBridge 175:b96e65c34a4d 175 intsts &= ~(1 << (chn_id - NU_PDMA_CH_Pos + DMA_GCR_GCRISR_INTR1_Pos));
AnnaBridge 175:b96e65c34a4d 176 }
AnnaBridge 175:b96e65c34a4d 177 }