C++ (Cpp) SCxSR_TEND示例

示例#1

文件： sh-sci.c 项目： ivucica/linux

static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
			    struct ktermios *old)
{
	struct sci_port *s = &sci_ports[port->line];
	unsigned int status, baud, smr_val;
	unsigned long flags;
	int t;

	baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);

	switch (baud) {
		case 0:
			t = -1;
			break;
		default:
		{
#if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64)
			struct clk *clk = clk_get(NULL, "module_clk");
			t = SCBRR_VALUE(baud, clk_get_rate(clk));
			clk_put(clk);
#else
			t = SCBRR_VALUE(baud);
#endif
		}
			break;
	}

	spin_lock_irqsave(&port->lock, flags);

	do {
		status = sci_in(port, SCxSR);
	} while (!(status & SCxSR_TEND(port)));

	sci_out(port, SCSCR, 0x00);	/* TE=0, RE=0, CKE1=0 */

#if !defined(SCI_ONLY)
	if (port->type == PORT_SCIF)
		sci_out(port, SCFCR, SCFCR_RFRST | SCFCR_TFRST);
#endif

	smr_val = sci_in(port, SCSMR) & 3;
	if ((termios->c_cflag & CSIZE) == CS7)
		smr_val |= 0x40;
	if (termios->c_cflag & PARENB)
		smr_val |= 0x20;
	if (termios->c_cflag & PARODD)
		smr_val |= 0x30;
	if (termios->c_cflag & CSTOPB)
		smr_val |= 0x08;

	uart_update_timeout(port, termios->c_cflag, baud);

	sci_out(port, SCSMR, smr_val);

	if (t > 0) {
		if(t >= 256) {
			sci_out(port, SCSMR, (sci_in(port, SCSMR) & ~3) | 1);
			t >>= 2;
		} else {

示例#2

文件： serial_sh.c 项目： ClarkChen633/u-boot-pi

void serial_raw_putc(const char c)
{
	while (1) {
		/* Tx fifo is empty */
		if (sci_in(&sh_sci, SCxSR) & SCxSR_TEND(&sh_sci))
			break;
	}

	sci_out(&sh_sci, SCxTDR, c);
	sci_out(&sh_sci, SCxSR, sci_in(&sh_sci, SCxSR) & ~SCxSR_TEND(&sh_sci));
}

示例#3

文件： early_printk.c 项目： 325116067/semc-qsd8x50

/*
 * Simple SCIF init, primarily aimed at SH7750 and other similar SH-4
 * devices that aren't using sh-ipl+g.
 */
static void scif_sercon_init(char *s)
{
	struct uart_port *port = &scif_port;
	unsigned baud = DEFAULT_BAUD;
	unsigned int status;
	char *e;

	if (*s == ',')
		++s;

	if (*s) {
		/* ignore ioport/device name */
		s += strcspn(s, ",");
		if (*s == ',')
			s++;
	}

	if (*s) {
		baud = simple_strtoul(s, &e, 0);
		if (baud == 0 || s == e)
			baud = DEFAULT_BAUD;
	}

	do {
		status = sci_in(port, SCxSR);
	} while (!(status & SCxSR_TEND(port)));

	sci_out(port, SCSCR, 0);	 /* TE=0, RE=0 */
	sci_out(port, SCFCR, SCFCR_RFRST | SCFCR_TFRST);
	sci_out(port, SCSMR, 0);

	/* Set baud rate */
	sci_out(port, SCBRR, (CONFIG_SH_PCLK_FREQ + 16 * baud) /
		(32 * baud) - 1);
	udelay((1000000+(baud-1)) / baud); /* Wait one bit interval */

	sci_out(port, SCSPTR, 0);
	sci_out(port, SCxSR, 0x60);
	sci_out(port, SCLSR, 0);

	sci_out(port, SCFCR, 0);
	sci_out(port, SCSCR, 0x30);	 /* TE=1, RE=1 */
}

示例#4

文件： sh-sci.c 项目： mpalmer/linux-2.6

static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
			    struct ktermios *old)
{
	struct sci_port *s = &sci_ports[port->line];
	unsigned int status, baud, smr_val;
	int t = -1;

	baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);
	if (likely(baud))
		t = SCBRR_VALUE(baud, port->uartclk);

	do {
		status = sci_in(port, SCxSR);
	} while (!(status & SCxSR_TEND(port)));

	sci_out(port, SCSCR, 0x00);	/* TE=0, RE=0, CKE1=0 */

#if !defined(SCI_ONLY)
	if (port->type == PORT_SCIF)
		sci_out(port, SCFCR, SCFCR_RFRST | SCFCR_TFRST);
#endif

	smr_val = sci_in(port, SCSMR) & 3;
	if ((termios->c_cflag & CSIZE) == CS7)
		smr_val |= 0x40;
	if (termios->c_cflag & PARENB)
		smr_val |= 0x20;
	if (termios->c_cflag & PARODD)
		smr_val |= 0x30;
	if (termios->c_cflag & CSTOPB)
		smr_val |= 0x08;

	uart_update_timeout(port, termios->c_cflag, baud);

	sci_out(port, SCSMR, smr_val);

	if (t > 0) {
		if(t >= 256) {
			sci_out(port, SCSMR, (sci_in(port, SCSMR) & ~3) | 1);
			t >>= 2;
		} else {