50 lines
1.8 KiB
C
50 lines
1.8 KiB
C
/*
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* Copyright (c) 2021 Max Thomas
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* This file is part of DSiWifi and is distributed under the MIT license.
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* See dsiwifi_license.txt for terms of use.
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*/
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#include "wifi_ndma.h"
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#include "wifi_card.h"
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#include "wifi_sdio.h"
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void wifi_ndma_init()
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{
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REG_NDMA_CNT(WIFI_NDMA_CHAN) = 0;
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REG_NDMA_GLOBAL_CNT = NDMA_GLOBAL_ENABLE | NDMA_FIXED_METHOD;
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}
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void wifi_ndma_read(void* dst, u32 len)
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{
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REG_NDMA_SRC_ADDR(WIFI_NDMA_CHAN) = (u32)(REG_SDIO_BASE + WIFI_SDIO_OFFS_DATA32_FIFO);
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REG_NDMA_DST_ADDR(WIFI_NDMA_CHAN) = (u32)(dst);
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REG_NDMA_TRANSFER_CNT(WIFI_NDMA_CHAN) = len / 4;
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REG_NDMA_WRITE_CNT(WIFI_NDMA_CHAN) = 0x80 / 4; // logical block size, set to SDIO block len
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// Physical block size is also set to 0x80 bytes, there's probably a better value
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// depending on what memory we're transferring to
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REG_NDMA_CNT(WIFI_NDMA_CHAN) = NDMA_ENABLE | NDMA_BLOCK_SIZE(0x80 / 4) | NDMA_STARTUP_MODE(NDMA_STARTUP_WIFI) | NDMA_SRC_MODE(NDMA_MODE_FIXED) | NDMA_DST_MODE(NDMA_MODE_INC);
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}
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void wifi_ndma_write(void* src, u32 len)
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{
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while (REG_NDMA_CNT(WIFI_NDMA_CHAN) & NDMA_ENABLE);
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REG_NDMA_SRC_ADDR(WIFI_NDMA_CHAN) = (u32)(src);
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REG_NDMA_DST_ADDR(WIFI_NDMA_CHAN) = (u32)(REG_SDIO_BASE + WIFI_SDIO_OFFS_DATA32_FIFO);
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REG_NDMA_TRANSFER_CNT(WIFI_NDMA_CHAN) = len / 4;
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REG_NDMA_WRITE_CNT(WIFI_NDMA_CHAN) = 0x80 / 4; // logical block size, set to SDIO block len
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// Physical block size is also set to 0x80 bytes, there's probably a better value
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// depending on what memory we're transferring to
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REG_NDMA_CNT(WIFI_NDMA_CHAN) = NDMA_ENABLE | NDMA_BLOCK_SIZE(0x80 / 4) | NDMA_STARTUP_MODE(NDMA_STARTUP_WIFI) | NDMA_SRC_MODE(NDMA_MODE_INC) | NDMA_DST_MODE(NDMA_MODE_FIXED);
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}
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void wifi_ndma_wait()
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{
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while (REG_NDMA_CNT(WIFI_NDMA_CHAN) & NDMA_ENABLE);
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}
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