Esempi in C++ (Cpp) per sh_mmcif_start_dma_rx

Esempio n. 1

File: sh_mmcif.c Progetto: daltenty/kernel-ubuntu.trusty-vgt

static bool sh_mmcif_end_cmd(struct sh_mmcif_host *host)
{
	struct mmc_command *cmd = host->mrq->cmd;
	struct mmc_data *data = host->mrq->data;
	long time;

	if (host->sd_error) {
		switch (cmd->opcode) {
		case MMC_ALL_SEND_CID:
		case MMC_SELECT_CARD:
		case MMC_APP_CMD:
			cmd->error = -ETIMEDOUT;
			break;
		default:
			cmd->error = sh_mmcif_error_manage(host);
			break;
		}
		dev_dbg(&host->pd->dev, "CMD%d error %d\n",
			cmd->opcode, cmd->error);
		host->sd_error = false;
		return false;
	}
	if (!(cmd->flags & MMC_RSP_PRESENT)) {
		cmd->error = 0;
		return false;
	}

	sh_mmcif_get_response(host, cmd);

	if (!data)
		return false;

	/*
	 * Completion can be signalled from DMA callback and error, so, have to
	 * reset here, before setting .dma_active
	 */
	init_completion(&host->dma_complete);

	if (data->flags & MMC_DATA_READ) {
		if (host->chan_rx)
			sh_mmcif_start_dma_rx(host);
	} else {
		if (host->chan_tx)
			sh_mmcif_start_dma_tx(host);
	}

	if (!host->dma_active) {
		data->error = sh_mmcif_data_trans(host, host->mrq, cmd->opcode);
		return !data->error;
	}

	/* Running in the IRQ thread, can sleep */
	time = wait_for_completion_interruptible_timeout(&host->dma_complete,
							 host->timeout);

	if (data->flags & MMC_DATA_READ)
		dma_unmap_sg(host->chan_rx->device->dev,
			     data->sg, data->sg_len,
			     DMA_FROM_DEVICE);
	else
		dma_unmap_sg(host->chan_tx->device->dev,
			     data->sg, data->sg_len,
			     DMA_TO_DEVICE);

	if (host->sd_error) {
		dev_err(host->mmc->parent,
			"Error IRQ while waiting for DMA completion!\n");
		/* Woken up by an error IRQ: abort DMA */
		data->error = sh_mmcif_error_manage(host);
	} else if (!time) {
		dev_err(host->mmc->parent, "DMA timeout!\n");
		data->error = -ETIMEDOUT;
	} else if (time < 0) {
		dev_err(host->mmc->parent,
			"wait_for_completion_...() error %ld!\n", time);
		data->error = time;
	}
	sh_mmcif_bitclr(host, MMCIF_CE_BUF_ACC,
			BUF_ACC_DMAREN | BUF_ACC_DMAWEN);
	host->dma_active = false;

	if (data->error) {
		data->bytes_xfered = 0;
		/* Abort DMA */
		if (data->flags & MMC_DATA_READ)
			dmaengine_terminate_all(host->chan_rx);
		else
			dmaengine_terminate_all(host->chan_tx);
	}

	return false;
}

Esempio n. 2

File: sh_mmcif.c Progetto: embest-amp/cycloneV_evm

static bool sh_mmcif_end_cmd(struct sh_mmcif_host *host)
{
	struct mmc_command *cmd = host->mrq->cmd;
	struct mmc_data *data = host->mrq->data;
	long time;

	if (host->sd_error) {
		switch (cmd->opcode) {
		case MMC_ALL_SEND_CID:
		case MMC_SELECT_CARD:
		case MMC_APP_CMD:
			cmd->error = -ETIMEDOUT;
			host->sd_error = false;
			break;
		default:
			cmd->error = sh_mmcif_error_manage(host);
			dev_dbg(&host->pd->dev, "Cmd(d'%d) error %d\n",
				cmd->opcode, cmd->error);
			break;
		}
		return false;
	}
	if (!(cmd->flags & MMC_RSP_PRESENT)) {
		cmd->error = 0;
		return false;
	}

	sh_mmcif_get_response(host, cmd);

	if (!data)
		return false;

	if (data->flags & MMC_DATA_READ) {
		if (host->chan_rx)
			sh_mmcif_start_dma_rx(host);
	} else {
		if (host->chan_tx)
			sh_mmcif_start_dma_tx(host);
	}

	if (!host->dma_active) {
		data->error = sh_mmcif_data_trans(host, host->mrq, cmd->opcode);
		if (!data->error)
			return true;
		return false;
	}

	/* Running in the IRQ thread, can sleep */
	time = wait_for_completion_interruptible_timeout(&host->dma_complete,
							 host->timeout);
	if (host->sd_error) {
		dev_err(host->mmc->parent,
			"Error IRQ while waiting for DMA completion!\n");
		/* Woken up by an error IRQ: abort DMA */
		if (data->flags & MMC_DATA_READ)
			dmaengine_terminate_all(host->chan_rx);
		else
			dmaengine_terminate_all(host->chan_tx);
		data->error = sh_mmcif_error_manage(host);
	} else if (!time) {
		data->error = -ETIMEDOUT;
	} else if (time < 0) {
		data->error = time;
	}
	sh_mmcif_bitclr(host, MMCIF_CE_BUF_ACC,
			BUF_ACC_DMAREN | BUF_ACC_DMAWEN);
	host->dma_active = false;

	if (data->error)
		data->bytes_xfered = 0;

	return false;
}