C++ (Cpp) rx_fifo_count Examples

Example #1

File: spi.c Project: canistation/coreboot

static int tegra_spi_pio_finish(struct tegra_spi_channel *spi)
{
	u8 *p = spi->in_buf;
	struct stopwatch sw;

	clrbits_le32(&spi->regs->command1, SPI_CMD1_RX_EN | SPI_CMD1_TX_EN);

	/*
	 * Allow some time in case the Rx FIFO does not yet have
	 * all packets pushed into it. See chrome-os-partner:24215.
	 */
	stopwatch_init_usecs_expire(&sw, SPI_FIFO_XFER_TIMEOUT_US);
	do {
		if (rx_fifo_count(spi) == spi_byte_count(spi))
			break;
	} while (!stopwatch_expired(&sw));

	while (!(read32(&spi->regs->fifo_status) &
				SPI_FIFO_STATUS_RX_FIFO_EMPTY)) {
		*p = read8(&spi->regs->rx_fifo);
		p++;
	}

	if (fifo_error(spi)) {
		printk(BIOS_ERR, "%s: ERROR:\n", __func__);
		dump_spi_regs(spi);
		dump_fifo_status(spi);
		return -1;
	}

	return 0;
}

Example #2

File: spi.c Project: siro20/coreboot

static int tegra_spi_pio_finish(struct tegra_spi_channel *spi)
{
	u8 *p = spi->in_buf;

	clrbits_le32(&spi->regs->command1, SPI_CMD1_RX_EN | SPI_CMD1_TX_EN);

	ASSERT(rx_fifo_count(spi) == spi_byte_count(spi));

	if (p) {
		while (!(read32(&spi->regs->fifo_status) &
			 SPI_FIFO_STATUS_RX_FIFO_EMPTY)) {
			*p = read8(&spi->regs->rx_fifo);
			p++;
		}
	}

	if (fifo_error(spi)) {
		printk(BIOS_ERR, "%s: ERROR:\n", __func__);
		dump_spi_regs(spi);
		dump_fifo_status(spi);
		return -1;
	}

	return 0;
}