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targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/dma_api.c@50:a417edff4437, 2016-01-15 (annotated)
- Committer:
- mbed_official
- Date:
- Fri Jan 15 07:45:16 2016 +0000
- Revision:
- 50:a417edff4437
- Parent:
- 0:9b334a45a8ff
- Child:
- 144:ef7eb2e8f9f7
Synchronized with git revision 6010f32619bfcbb01cc73747d4ff9040863482d9
Full URL: https://github.com/mbedmicro/mbed/commit/6010f32619bfcbb01cc73747d4ff9040863482d9/
Remove doubling of buffer size in realiseEndpoint()
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
bogdanm | 0:9b334a45a8ff | 1 | /***************************************************************************//** |
bogdanm | 0:9b334a45a8ff | 2 | * @file dma_api.c |
bogdanm | 0:9b334a45a8ff | 3 | ******************************************************************************* |
bogdanm | 0:9b334a45a8ff | 4 | * @section License |
bogdanm | 0:9b334a45a8ff | 5 | * <b>(C) Copyright 2015 Silicon Labs, http://www.silabs.com</b> |
bogdanm | 0:9b334a45a8ff | 6 | ******************************************************************************* |
bogdanm | 0:9b334a45a8ff | 7 | * |
bogdanm | 0:9b334a45a8ff | 8 | * Permission is granted to anyone to use this software for any purpose, |
bogdanm | 0:9b334a45a8ff | 9 | * including commercial applications, and to alter it and redistribute it |
bogdanm | 0:9b334a45a8ff | 10 | * freely, subject to the following restrictions: |
bogdanm | 0:9b334a45a8ff | 11 | * |
bogdanm | 0:9b334a45a8ff | 12 | * 1. The origin of this software must not be misrepresented; you must not |
bogdanm | 0:9b334a45a8ff | 13 | * claim that you wrote the original software. |
bogdanm | 0:9b334a45a8ff | 14 | * 2. Altered source versions must be plainly marked as such, and must not be |
bogdanm | 0:9b334a45a8ff | 15 | * misrepresented as being the original software. |
bogdanm | 0:9b334a45a8ff | 16 | * 3. This notice may not be removed or altered from any source distribution. |
bogdanm | 0:9b334a45a8ff | 17 | * |
bogdanm | 0:9b334a45a8ff | 18 | * DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Silicon Labs has no |
bogdanm | 0:9b334a45a8ff | 19 | * obligation to support this Software. Silicon Labs is providing the |
bogdanm | 0:9b334a45a8ff | 20 | * Software "AS IS", with no express or implied warranties of any kind, |
bogdanm | 0:9b334a45a8ff | 21 | * including, but not limited to, any implied warranties of merchantability |
bogdanm | 0:9b334a45a8ff | 22 | * or fitness for any particular purpose or warranties against infringement |
bogdanm | 0:9b334a45a8ff | 23 | * of any proprietary rights of a third party. |
bogdanm | 0:9b334a45a8ff | 24 | * |
bogdanm | 0:9b334a45a8ff | 25 | * Silicon Labs will not be liable for any consequential, incidental, or |
bogdanm | 0:9b334a45a8ff | 26 | * special damages, or any other relief, or for any claim by any third party, |
bogdanm | 0:9b334a45a8ff | 27 | * arising from your use of this Software. |
bogdanm | 0:9b334a45a8ff | 28 | * |
bogdanm | 0:9b334a45a8ff | 29 | ******************************************************************************/ |
bogdanm | 0:9b334a45a8ff | 30 | |
bogdanm | 0:9b334a45a8ff | 31 | #include <stdint.h> |
bogdanm | 0:9b334a45a8ff | 32 | #include "dma_api_HAL.h" |
mbed_official | 50:a417edff4437 | 33 | #include "em_device.h" |
mbed_official | 50:a417edff4437 | 34 | #include "em_cmu.h" |
mbed_official | 50:a417edff4437 | 35 | #include "em_int.h" |
mbed_official | 50:a417edff4437 | 36 | |
mbed_official | 50:a417edff4437 | 37 | #ifdef DMA_PRESENT |
bogdanm | 0:9b334a45a8ff | 38 | #include "em_dma.h" |
mbed_official | 50:a417edff4437 | 39 | #endif |
mbed_official | 50:a417edff4437 | 40 | |
mbed_official | 50:a417edff4437 | 41 | #ifdef LDMA_PRESENT |
mbed_official | 50:a417edff4437 | 42 | #include "em_ldma.h" |
mbed_official | 50:a417edff4437 | 43 | #endif |
bogdanm | 0:9b334a45a8ff | 44 | |
bogdanm | 0:9b334a45a8ff | 45 | /** DMA control block array, requires proper alignment. */ |
mbed_official | 50:a417edff4437 | 46 | #ifdef DMA_PRESENT |
bogdanm | 0:9b334a45a8ff | 47 | #if defined (__ICCARM__) |
bogdanm | 0:9b334a45a8ff | 48 | #pragma data_alignment=DMACTRL_ALIGNMENT |
bogdanm | 0:9b334a45a8ff | 49 | DMA_DESCRIPTOR_TypeDef dmaControlBlock[DMACTRL_CH_CNT * 2]; |
bogdanm | 0:9b334a45a8ff | 50 | |
bogdanm | 0:9b334a45a8ff | 51 | #elif defined (__CC_ARM) |
bogdanm | 0:9b334a45a8ff | 52 | DMA_DESCRIPTOR_TypeDef dmaControlBlock[DMACTRL_CH_CNT * 2] __attribute__ ((aligned(DMACTRL_ALIGNMENT))); |
bogdanm | 0:9b334a45a8ff | 53 | |
bogdanm | 0:9b334a45a8ff | 54 | #elif defined (__GNUC__) |
bogdanm | 0:9b334a45a8ff | 55 | DMA_DESCRIPTOR_TypeDef dmaControlBlock[DMACTRL_CH_CNT * 2] __attribute__ ((aligned(DMACTRL_ALIGNMENT), section("dma"))); |
bogdanm | 0:9b334a45a8ff | 56 | |
bogdanm | 0:9b334a45a8ff | 57 | #else |
bogdanm | 0:9b334a45a8ff | 58 | #error Undefined toolkit, need to define alignment |
bogdanm | 0:9b334a45a8ff | 59 | #endif |
mbed_official | 50:a417edff4437 | 60 | #endif /* DMA_PRESENT */ |
bogdanm | 0:9b334a45a8ff | 61 | |
bogdanm | 0:9b334a45a8ff | 62 | uint32_t channels = 0; // Bit vector of taken channels |
bogdanm | 0:9b334a45a8ff | 63 | bool enabled = false; |
bogdanm | 0:9b334a45a8ff | 64 | |
bogdanm | 0:9b334a45a8ff | 65 | void dma_init(void) |
bogdanm | 0:9b334a45a8ff | 66 | { |
bogdanm | 0:9b334a45a8ff | 67 | if (enabled) return; |
mbed_official | 50:a417edff4437 | 68 | |
mbed_official | 50:a417edff4437 | 69 | #if defined DMA_PRESENT |
mbed_official | 50:a417edff4437 | 70 | CMU_ClockEnable(cmuClock_DMA, true); |
mbed_official | 50:a417edff4437 | 71 | CMU_ClockEnable(cmuClock_HFPER, true); // FIXME: DMA is clocked via HFCORECLK, why HFPERCLK? |
mbed_official | 50:a417edff4437 | 72 | |
bogdanm | 0:9b334a45a8ff | 73 | DMA_Init_TypeDef dmaInit; |
bogdanm | 0:9b334a45a8ff | 74 | |
bogdanm | 0:9b334a45a8ff | 75 | dmaInit.hprot = 0; |
bogdanm | 0:9b334a45a8ff | 76 | dmaInit.controlBlock = dmaControlBlock; |
bogdanm | 0:9b334a45a8ff | 77 | DMA_Init(&dmaInit); |
mbed_official | 50:a417edff4437 | 78 | |
mbed_official | 50:a417edff4437 | 79 | #elif defined LDMA_PRESENT |
mbed_official | 50:a417edff4437 | 80 | CMU_ClockEnable(cmuClock_LDMA, true); |
mbed_official | 50:a417edff4437 | 81 | |
mbed_official | 50:a417edff4437 | 82 | LDMA_Init_t ldmaInit; |
mbed_official | 50:a417edff4437 | 83 | |
mbed_official | 50:a417edff4437 | 84 | ldmaInit.ldmaInitCtrlNumFixed = 0; /* All channels round-robin */ |
mbed_official | 50:a417edff4437 | 85 | ldmaInit.ldmaInitCtrlSyncPrsClrEn = 0; /* Do not allow PRS to clear SYNCTRIG */ |
mbed_official | 50:a417edff4437 | 86 | ldmaInit.ldmaInitCtrlSyncPrsSetEn = 0; /* Do not allow PRS to set SYNCTRIG */ |
mbed_official | 50:a417edff4437 | 87 | ldmaInit.ldmaInitIrqPriority = 2; /* IRQ Priority */ |
mbed_official | 50:a417edff4437 | 88 | |
mbed_official | 50:a417edff4437 | 89 | LDMA_Init(&ldmaInit); |
mbed_official | 50:a417edff4437 | 90 | #else |
mbed_official | 50:a417edff4437 | 91 | #error "Unrecognized DMA peripheral" |
mbed_official | 50:a417edff4437 | 92 | #endif |
mbed_official | 50:a417edff4437 | 93 | |
bogdanm | 0:9b334a45a8ff | 94 | enabled = true; |
bogdanm | 0:9b334a45a8ff | 95 | } |
bogdanm | 0:9b334a45a8ff | 96 | |
bogdanm | 0:9b334a45a8ff | 97 | int dma_channel_allocate(uint32_t capabilities) |
bogdanm | 0:9b334a45a8ff | 98 | { |
bogdanm | 0:9b334a45a8ff | 99 | int i; |
bogdanm | 0:9b334a45a8ff | 100 | // Check if 2d copy is required |
bogdanm | 0:9b334a45a8ff | 101 | if (DMA_CAP_2DCOPY & capabilities) { |
bogdanm | 0:9b334a45a8ff | 102 | if (channels & 1) { |
bogdanm | 0:9b334a45a8ff | 103 | // Channel already in use |
bogdanm | 0:9b334a45a8ff | 104 | return DMA_ERROR_OUT_OF_CHANNELS; |
bogdanm | 0:9b334a45a8ff | 105 | } else { |
bogdanm | 0:9b334a45a8ff | 106 | channels |= 1 << 0; |
bogdanm | 0:9b334a45a8ff | 107 | return 0; |
bogdanm | 0:9b334a45a8ff | 108 | } |
bogdanm | 0:9b334a45a8ff | 109 | } |
bogdanm | 0:9b334a45a8ff | 110 | for (i = 1; i < DMA_CHAN_COUNT; i++) { |
bogdanm | 0:9b334a45a8ff | 111 | if ((channels & (1 << i)) == 0) { |
bogdanm | 0:9b334a45a8ff | 112 | // Channel available |
bogdanm | 0:9b334a45a8ff | 113 | channels |= 1 << i; |
bogdanm | 0:9b334a45a8ff | 114 | return i; |
bogdanm | 0:9b334a45a8ff | 115 | } |
bogdanm | 0:9b334a45a8ff | 116 | } |
bogdanm | 0:9b334a45a8ff | 117 | // Check if channel 0 is available |
bogdanm | 0:9b334a45a8ff | 118 | if ((channels & 1 ) == 0) { |
bogdanm | 0:9b334a45a8ff | 119 | channels |= 1 << 0; |
bogdanm | 0:9b334a45a8ff | 120 | return 0; |
bogdanm | 0:9b334a45a8ff | 121 | } |
bogdanm | 0:9b334a45a8ff | 122 | // Couldn't find a channel. |
bogdanm | 0:9b334a45a8ff | 123 | return DMA_ERROR_OUT_OF_CHANNELS; |
bogdanm | 0:9b334a45a8ff | 124 | } |
bogdanm | 0:9b334a45a8ff | 125 | |
bogdanm | 0:9b334a45a8ff | 126 | int dma_channel_free(int channelid) |
bogdanm | 0:9b334a45a8ff | 127 | { |
mbed_official | 50:a417edff4437 | 128 | if( channelid >= 0 ) { |
mbed_official | 50:a417edff4437 | 129 | channels &= ~(1 << channelid); |
mbed_official | 50:a417edff4437 | 130 | } |
mbed_official | 50:a417edff4437 | 131 | |
bogdanm | 0:9b334a45a8ff | 132 | return 0; |
bogdanm | 0:9b334a45a8ff | 133 | } |
bogdanm | 0:9b334a45a8ff | 134 | |
mbed_official | 50:a417edff4437 | 135 | #ifdef LDMA_PRESENT |
mbed_official | 50:a417edff4437 | 136 | |
mbed_official | 50:a417edff4437 | 137 | /* LDMA emlib API extensions */ |
mbed_official | 50:a417edff4437 | 138 | |
mbed_official | 50:a417edff4437 | 139 | typedef struct { |
mbed_official | 50:a417edff4437 | 140 | LDMAx_CBFunc_t callback; |
mbed_official | 50:a417edff4437 | 141 | void *userdata; |
mbed_official | 50:a417edff4437 | 142 | } LDMA_InternCallback_t; |
mbed_official | 50:a417edff4437 | 143 | |
mbed_official | 50:a417edff4437 | 144 | static LDMA_InternCallback_t ldmaCallback[DMA_CHAN_COUNT]; |
mbed_official | 50:a417edff4437 | 145 | |
mbed_official | 50:a417edff4437 | 146 | void LDMAx_StartTransfer( int ch, |
mbed_official | 50:a417edff4437 | 147 | LDMA_TransferCfg_t *transfer, |
mbed_official | 50:a417edff4437 | 148 | LDMA_Descriptor_t *descriptor, |
mbed_official | 50:a417edff4437 | 149 | LDMAx_CBFunc_t cbFunc, |
mbed_official | 50:a417edff4437 | 150 | void *userData ) |
mbed_official | 50:a417edff4437 | 151 | { |
mbed_official | 50:a417edff4437 | 152 | ldmaCallback[ch].callback = cbFunc; |
mbed_official | 50:a417edff4437 | 153 | ldmaCallback[ch].userdata = userData; |
mbed_official | 50:a417edff4437 | 154 | |
mbed_official | 50:a417edff4437 | 155 | LDMA_StartTransfer(ch, transfer, descriptor); |
mbed_official | 50:a417edff4437 | 156 | } |
mbed_official | 50:a417edff4437 | 157 | |
mbed_official | 50:a417edff4437 | 158 | void LDMA_IRQHandler( void ) |
mbed_official | 50:a417edff4437 | 159 | { |
mbed_official | 50:a417edff4437 | 160 | uint32_t pending, chnum, chmask; |
mbed_official | 50:a417edff4437 | 161 | |
mbed_official | 50:a417edff4437 | 162 | /* Get all pending and enabled interrupts */ |
mbed_official | 50:a417edff4437 | 163 | pending = LDMA->IF; |
mbed_official | 50:a417edff4437 | 164 | pending &= LDMA->IEN; |
mbed_official | 50:a417edff4437 | 165 | |
mbed_official | 50:a417edff4437 | 166 | /* Check for LDMA error */ |
mbed_official | 50:a417edff4437 | 167 | if ( pending & LDMA_IF_ERROR ) |
mbed_official | 50:a417edff4437 | 168 | { |
mbed_official | 50:a417edff4437 | 169 | /* Loop here to enable the debugger to see what has happened */ |
mbed_official | 50:a417edff4437 | 170 | while (1) |
mbed_official | 50:a417edff4437 | 171 | ; |
mbed_official | 50:a417edff4437 | 172 | } |
mbed_official | 50:a417edff4437 | 173 | |
mbed_official | 50:a417edff4437 | 174 | /* Iterate over all LDMA channels. */ |
mbed_official | 50:a417edff4437 | 175 | for ( chnum = 0, chmask = 1; |
mbed_official | 50:a417edff4437 | 176 | chnum < DMA_CHAN_COUNT; |
mbed_official | 50:a417edff4437 | 177 | chnum++, chmask <<= 1 ) |
mbed_official | 50:a417edff4437 | 178 | { |
mbed_official | 50:a417edff4437 | 179 | if ( pending & chmask ) |
mbed_official | 50:a417edff4437 | 180 | { |
mbed_official | 50:a417edff4437 | 181 | /* Clear interrupt flag. */ |
mbed_official | 50:a417edff4437 | 182 | LDMA->IFC = chmask; |
mbed_official | 50:a417edff4437 | 183 | |
mbed_official | 50:a417edff4437 | 184 | /* Do more stuff here, execute callbacks etc. */ |
mbed_official | 50:a417edff4437 | 185 | if ( ldmaCallback[chnum].callback ) |
mbed_official | 50:a417edff4437 | 186 | { |
mbed_official | 50:a417edff4437 | 187 | ldmaCallback[chnum].callback(chnum, false, ldmaCallback[chnum].userdata); |
mbed_official | 50:a417edff4437 | 188 | } |
mbed_official | 50:a417edff4437 | 189 | } |
mbed_official | 50:a417edff4437 | 190 | } |
mbed_official | 50:a417edff4437 | 191 | } |
mbed_official | 50:a417edff4437 | 192 | |
mbed_official | 50:a417edff4437 | 193 | /***************************************************************************//** |
mbed_official | 50:a417edff4437 | 194 | * @brief |
mbed_official | 50:a417edff4437 | 195 | * Check if LDMA channel is enabled. |
mbed_official | 50:a417edff4437 | 196 | * |
mbed_official | 50:a417edff4437 | 197 | * @param[in] ch |
mbed_official | 50:a417edff4437 | 198 | * LDMA channel to check. |
mbed_official | 50:a417edff4437 | 199 | * |
mbed_official | 50:a417edff4437 | 200 | * @return |
mbed_official | 50:a417edff4437 | 201 | * true if channel is enabled, false if not. |
mbed_official | 50:a417edff4437 | 202 | ******************************************************************************/ |
mbed_official | 50:a417edff4437 | 203 | bool LDMAx_ChannelEnabled( int ch ) |
mbed_official | 50:a417edff4437 | 204 | { |
mbed_official | 50:a417edff4437 | 205 | EFM_ASSERT(ch < DMA_CHAN_COUNT); |
mbed_official | 50:a417edff4437 | 206 | uint32_t chMask = 1 << ch; |
mbed_official | 50:a417edff4437 | 207 | return (bool)(LDMA->CHEN & chMask); |
mbed_official | 50:a417edff4437 | 208 | INT_Disable(); |
mbed_official | 50:a417edff4437 | 209 | } |
mbed_official | 50:a417edff4437 | 210 | |
mbed_official | 50:a417edff4437 | 211 | #endif /* LDMA_PRESENT */ |