C++ (Cpp) bounce_buffer_start Examples

Example #1

File: tegra_mmc.c Project: 675816156/uboot-2016-for-itop4412

static int tegra_mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
			struct mmc_data *data)
{
	void *buf;
	unsigned int bbflags;
	size_t len;
	struct bounce_buffer bbstate;
	int ret;

	if (data) {
		if (data->flags & MMC_DATA_READ) {
			buf = data->dest;
			bbflags = GEN_BB_WRITE;
		} else {
			buf = (void *)data->src;
			bbflags = GEN_BB_READ;
		}
		len = data->blocks * data->blocksize;

		bounce_buffer_start(&bbstate, buf, len, bbflags);
	}

	ret = mmc_send_cmd_bounced(mmc, cmd, data, &bbstate);

	if (data)
		bounce_buffer_stop(&bbstate);

	return ret;
}

Example #2

File: mxsmmc.c Project: emanbehere/MySoCkit

static int mxsmmc_send_cmd_dma(struct mxsmmc_priv *priv, struct mmc_data *data)
{
	uint32_t data_count = data->blocksize * data->blocks;
	int dmach;
	struct mxs_dma_desc *desc = priv->desc;
	void *addr;
	unsigned int flags;
	struct bounce_buffer bbstate;

	memset(desc, 0, sizeof(struct mxs_dma_desc));
	desc->address = (dma_addr_t)desc;

	if (data->flags & MMC_DATA_READ) {
		priv->desc->cmd.data = MXS_DMA_DESC_COMMAND_DMA_WRITE;
		addr = data->dest;
		flags = GEN_BB_WRITE;
	} else {
		priv->desc->cmd.data = MXS_DMA_DESC_COMMAND_DMA_READ;
		addr = (void *)data->src;
		flags = GEN_BB_READ;
	}

	bounce_buffer_start(&bbstate, addr, data_count, flags);

	priv->desc->cmd.address = (dma_addr_t)bbstate.bounce_buffer;

	priv->desc->cmd.data |= MXS_DMA_DESC_IRQ | MXS_DMA_DESC_DEC_SEM |
				(data_count << MXS_DMA_DESC_BYTES_OFFSET);

	dmach = MXS_DMA_CHANNEL_AHB_APBH_SSP0 + priv->id + mxsmmc_id_offset;
	mxs_dma_desc_append(dmach, priv->desc);
	if (mxs_dma_go(dmach)) {
		bounce_buffer_stop(&bbstate);
		return COMM_ERR;
	}

	bounce_buffer_stop(&bbstate);

	return 0;
}