C++ (Cpp) zynq_qspi_chipselect Exemples

Exemple #1

Fichier : zynq_qspi.c Projet : develone/u-boot-xlnx

static int zynq_qspi_transfer(struct spi_device *qspi,
		struct spi_transfer *transfer)
{
	struct zynq_qspi *zqspi = &qspi->master;
	unsigned cs_change = 1;
	int status = 0;

	debug("%s\n", __func__);

	while (1) {
		if (transfer->bits_per_word || transfer->speed_hz) {
			status = zynq_qspi_setup_transfer(qspi, transfer);
			if (status < 0)
				break;
		}

		/* Select the chip if required */
		if (cs_change)
			zynq_qspi_chipselect(qspi, 1);

		cs_change = transfer->cs_change;

		if (!transfer->tx_buf && !transfer->rx_buf && transfer->len) {
			status = -1;
			break;
		}

		/* Request the transfer */
		if (transfer->len) {
			status = zynq_qspi_start_transfer(qspi, transfer);
			zqspi->is_inst = 0;
		}

		if (status != transfer->len) {
			if (status > 0)
				status = -EMSGSIZE;
			break;
		}
		status = 0;

		if (transfer->delay_usecs)
			udelay(transfer->delay_usecs);

		if (cs_change)
			/* Deselect the chip */
			zynq_qspi_chipselect(qspi, 0);

		break;
	}

	zynq_qspi_setup_transfer(qspi, NULL);

	return 0;
}

Exemple #2

Fichier : zynq_qspi.c Projet : youncta-dev/u-boot-xlnx

static int zynq_qspi_transfer(struct zynq_qspi_priv *priv)
{
	unsigned cs_change = 1;
	int status = 0;

	debug("%s\n", __func__);

	while (1) {

		/* Select the chip if required */
		if (cs_change)
			zynq_qspi_chipselect(priv, 1);

		cs_change = priv->cs_change;

		if (!priv->txbuf && !priv->rxbuf && priv->len) {
			status = -1;
			break;
		}

		/* Request the transfer */
		if (priv->len) {
			status = zynq_qspi_start_transfer(priv);
			priv->is_inst = 0;
		}

		if (status != priv->len) {
			if (status > 0)
				status = -EMSGSIZE;
			debug("zynq_qspi_transfer:%d len:%d\n", status, priv->len);
			break;
		}
		status = 0;

		if (cs_change)
			/* Deselect the chip */
			zynq_qspi_chipselect(priv, 0);

		break;
	}

	return 0;
}