-static int mmc_trans_data_by_dma(struct mmc *mmc, struct mmc_data *data)
-{
- struct sunxi_mmc_host *mmchost = mmc->priv;
- unsigned byte_cnt = data->blocksize * data->blocks;
- unsigned char *buff;
- unsigned des_idx = 0;
- unsigned buff_frag_num =
- (byte_cnt + SDXC_DES_BUFFER_MAX_LEN - 1) >> SDXC_DES_NUM_SHIFT;
- unsigned remain;
- unsigned i, rval;
- ALLOC_CACHE_ALIGN_BUFFER(struct sunxi_mmc_des, pdes, buff_frag_num);
-
- buff = data->flags & MMC_DATA_READ ?
- (unsigned char *)data->dest : (unsigned char *)data->src;
- remain = byte_cnt & (SDXC_DES_BUFFER_MAX_LEN - 1);
-
- flush_cache((unsigned long)buff, (unsigned long)byte_cnt);
- for (i = 0; i < buff_frag_num; i++, des_idx++) {
- memset((void *)&pdes[des_idx], 0, sizeof(struct sunxi_mmc_des));
- pdes[des_idx].des_chain = 1;
- pdes[des_idx].own = 1;
- pdes[des_idx].dic = 1;
- if (buff_frag_num > 1 && i != buff_frag_num - 1)
- pdes[des_idx].data_buf1_sz = 0; /* 0 == max_len */
- else
- pdes[des_idx].data_buf1_sz = remain;
-
- pdes[des_idx].buf_addr_ptr1 =
- (u32) buff + i * SDXC_DES_BUFFER_MAX_LEN;
- if (i == 0)
- pdes[des_idx].first_des = 1;
-
- if (i == buff_frag_num - 1) {
- pdes[des_idx].dic = 0;
- pdes[des_idx].last_des = 1;
- pdes[des_idx].end_of_ring = 1;
- pdes[des_idx].buf_addr_ptr2 = 0;
- } else {
- pdes[des_idx].buf_addr_ptr2 = (u32)&pdes[des_idx + 1];
- }
- }
- flush_cache((unsigned long)pdes,
- sizeof(struct sunxi_mmc_des) * (des_idx + 1));
-
- rval = readl(&mmchost->reg->gctrl);
- /* Enable DMA */
- writel(rval | SUNXI_MMC_GCTRL_DMA_RESET | SUNXI_MMC_GCTRL_DMA_ENABLE,
- &mmchost->reg->gctrl);
- /* Reset iDMA */
- writel(SUNXI_MMC_IDMAC_RESET, &mmchost->reg->dmac);
- /* Enable iDMA */
- writel(SUNXI_MMC_IDMAC_FIXBURST | SUNXI_MMC_IDMAC_ENABLE,
- &mmchost->reg->dmac);
- rval = readl(&mmchost->reg->idie) &
- ~(SUNXI_MMC_IDIE_TXIRQ|SUNXI_MMC_IDIE_RXIRQ);
- if (data->flags & MMC_DATA_WRITE)
- rval |= SUNXI_MMC_IDIE_TXIRQ;
- else
- rval |= SUNXI_MMC_IDIE_RXIRQ;
- writel(rval, &mmchost->reg->idie);
- writel((u32) pdes, &mmchost->reg->dlba);
- writel((0x2 << 28) | (0x7 << 16) | (0x01 << 3),
- &mmchost->reg->ftrglevel);
-
- return 0;
-}
-
-static void mmc_enable_dma_accesses(struct mmc *mmc, int dma)
-{
- struct sunxi_mmc_host *mmchost = mmc->priv;
-
- unsigned int gctrl = readl(&mmchost->reg->gctrl);
- if (dma)
- gctrl &= ~SUNXI_MMC_GCTRL_ACCESS_BY_AHB;
- else
- gctrl |= SUNXI_MMC_GCTRL_ACCESS_BY_AHB;
- writel(gctrl, &mmchost->reg->gctrl);
-}
-