TEST sourcecode format,

gistfile1.txt

/*
 * Copyright 2004-2011 Freescale Semiconductor, Inc. All Rights Reserved.
 */

/*
 * The code contained herein is licensed under the GNU General Public
 * License. You may obtain a copy of the GNU General Public License
 * Version 2 or later at the following locations:
 *
 * http://www.opensource.org/licenses/gpl-license.html
 * http://www.gnu.org/copyleft/gpl.html
 */

/*!
 * @file drivers/serial/mxc_uart.c
 *
 * @brief Driver for the Freescale Semiconductor MXC serial ports based on
 * drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
 *
 * @ingroup UART
 */


static void mxcuart_dma_writecallback(void *arg, int error, unsigned int count)
{
        uart_mxc_port *umxc = arg;
        struct circ_buf *xmit = &umxc->port.state->xmit;
        int tx_num;

        if (error != MXC_DMA_TRANSFER_ERROR) {
                tx_num = count;
                umxc->port.icount.tx += tx_num;
                xmit->tail = (xmit->tail + tx_num) & (UART_XMIT_SIZE - 1);
        }

        dma_unmap_single(umxc->port.dev, umxc->tx_handle, TXDMA_BUFF_SIZE,
                         DMA_TO_DEVICE);

        tx_num = uart_circ_chars_pending(xmit);
        if (tx_num > 0)
                mxcuart_dma_tx(umxc);
        else
                dma_list[umxc->port.line].dma_txchnl_inuse = 0;

        if (tx_num < WAKEUP_CHARS)
                uart_write_wakeup(&umxc->port);
}