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fix for dma problems?

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Sven Peter 2009-02-07 17:01:53 +01:00 committed by bushing
parent 3fc45b7dd8
commit e14be86d6c
1 changed files with 5 additions and 4 deletions
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9
sdhc.c
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@ -697,13 +697,15 @@ static s32 __sd_cmd(sdhci_t *sdhci, u32 cmd, u32 type, u32 arg, u32 blk_cnt, voi
{
__sd_dumpregs(sdhci);
sdhc_debug(sdhci->reg_base, "transfer completed. disabling interrupts again and returning.");
__sd_write16(sdhci->reg_base + SDHC_NORMAL_INTERRUPT_STATUS, 0);
__sd_write16(sdhci->reg_base + SDHC_NORMAL_INTERRUPT_STATUS, INTERRUPT_TRANSFER_COMPLETE | INTERRUPT_DMA);
__sd_write16(sdhci->reg_base + SDHC_NORMAL_INTERRUPT_ENABLE, 0);
return 0;
}
else if(retval & INTERRUPT_DMA)
{
blk_cnt = blk_cnt > (SDMA_BLOCK_SIZE / SDHC_BLOCK_SIZE) ? blk_cnt - (SDMA_BLOCK_SIZE / SDHC_BLOCK_SIZE) : 0;
u32 blk_left = __sd_read16(sdhci->reg_base + SDHC_BLOCK_COUNT);
blk_left = blk_cnt - blk_left;
ptr = buffer + blk_cnt * SDHC_BLOCK_SIZE;
__sd_dumpregs(sdhci);
sdhc_debug(sdhci->reg_base, "DMA interrupt set, updating next SDMA address");
sdhc_debug(sdhci->reg_base, "sd blocks left: %d, addr: %p -> %p", blk_cnt, ptr, ptr + SDMA_BLOCK_SIZE);
@ -715,8 +717,7 @@ static s32 __sd_cmd(sdhci_t *sdhci, u32 cmd, u32 type, u32 arg, u32 blk_cnt, voi
return SDHC_EIO;
}
__sd_write16(sdhci->reg_base + SDHC_NORMAL_INTERRUPT_STATUS, 0);
ptr += SDMA_BLOCK_SIZE;
__sd_write16(sdhci->reg_base + SDHC_NORMAL_INTERRUPT_STATUS, INTERRUPT_DMA);
__sd_write32(sdhci->reg_base + SDHC_SDMA_ADDR, (u32 )ptr);
sdhc_debug(sdhci->reg_base, "next DMA transfer started.");