C++ (Cpp) dw8250_force_idle示例

示例#1

文件： 8250_dw.c 项目： mobilehunter/trafficsqueezer

static void dw8250_serial_out(struct uart_port *p, int offset, int value)
{
	struct dw8250_data *d = p->private_data;

	if (offset == UART_MCR)
		d->last_mcr = value;

	writeb(value, p->membase + (offset << p->regshift));

	/* Make sure LCR write wasn't ignored */
	if (offset == UART_LCR) {
		int tries = 1000;
		while (tries--) {
			unsigned int lcr = p->serial_in(p, UART_LCR);
			if ((value & ~UART_LCR_SPAR) == (lcr & ~UART_LCR_SPAR))
				return;
			dw8250_force_idle(p);
			writeb(value, p->membase + (UART_LCR << p->regshift));
		}
		/*
		 * FIXME: this deadlocks if port->lock is already held
		 * dev_err(p->dev, "Couldn't set LCR to %d\n", value);
		 */
	}
}

示例#2

文件： 8250_dw.c 项目： 383530895/linux

static void dw8250_serial_outq(struct uart_port *p, int offset, int value)
{
	struct dw8250_data *d = p->private_data;

	if (offset == UART_MCR)
		d->last_mcr = value;

	value &= 0xff;
	__raw_writeq(value, p->membase + (offset << p->regshift));
	/* Read back to ensure register write ordering. */
	__raw_readq(p->membase + (UART_LCR << p->regshift));

	/* Make sure LCR write wasn't ignored */
	if (offset == UART_LCR) {
		int tries = 1000;
		while (tries--) {
			unsigned int lcr = p->serial_in(p, UART_LCR);
			if ((value & ~UART_LCR_SPAR) == (lcr & ~UART_LCR_SPAR))
				return;
			dw8250_force_idle(p);
			__raw_writeq(value & 0xff,
				     p->membase + (UART_LCR << p->regshift));
		}
		dev_err(p->dev, "Couldn't set LCR to %d\n", value);
	}
}

示例#3

static void dw8250_check_lcr(struct uart_port *p, int value)
{
    void __iomem *offset = p->membase + (UART_LCR << p->regshift);
    int tries = 1000;

    /* Make sure LCR write wasn't ignored */
    while (tries--) {
        unsigned int lcr = p->serial_in(p, UART_LCR);

        if ((value & ~UART_LCR_SPAR) == (lcr & ~UART_LCR_SPAR))
            return;

        dw8250_force_idle(p);

#ifdef CONFIG_64BIT
        if (p->type == PORT_OCTEON)
            __raw_writeq(value & 0xff, offset);
        else
#endif
            if (p->iotype == UPIO_MEM32)
                writel(value, offset);
            else if (p->iotype == UPIO_MEM32BE)
                iowrite32be(value, offset);
            else
                writeb(value, offset);
    }
    /*
     * FIXME: this deadlocks if port->lock is already held
     * dev_err(p->dev, "Couldn't set LCR to %d\n", value);
     */
}

示例#4

文件： 8250_dw.c 项目： AnadoluPanteri/kernel-plus-harmattan

static void dw8250_serial_out(struct uart_port *p, int offset, int value)
{
	struct dw8250_data *d = p->private_data;

	if (offset == UART_MCR)
		d->last_mcr = value;

	writeb(value, p->membase + (offset << p->regshift));

	/* Make sure LCR write wasn't ignored */
	if (offset == UART_LCR) {
		int tries = 1000;
		while (tries--) {
			if (value == p->serial_in(p, UART_LCR))
				return;
			dw8250_force_idle(p);
			writeb(value, p->membase + (UART_LCR << p->regshift));
		}
		dev_err(p->dev, "Couldn't set LCR to %d\n", value);
	}
}

示例#5

文件： 8250_dw.c 项目： DenisLug/mptcp

static void dw8250_serial_outq(struct uart_port *p, int offset, int value)
{
	value &= 0xff;
	__raw_writeq(value, p->membase + (offset << p->regshift));
	/* Read back to ensure register write ordering. */
	__raw_readq(p->membase + (UART_LCR << p->regshift));

	/* Make sure LCR write wasn't ignored */
	if (offset == UART_LCR) {
		int tries = 1000;
		while (tries--) {
			unsigned int lcr = p->serial_in(p, UART_LCR);
			if ((value & ~UART_LCR_SPAR) == (lcr & ~UART_LCR_SPAR))
				return;
			dw8250_force_idle(p);
			__raw_writeq(value & 0xff,
				     p->membase + (UART_LCR << p->regshift));
		}
		/*
		 * FIXME: this deadlocks if port->lock is already held
		 * dev_err(p->dev, "Couldn't set LCR to %d\n", value);
		 */
	}
}