Commit 373bac4c authored by Alan Cox's avatar Alan Cox Committed by Greg Kroah-Hartman
Browse files

uart: add other serial core layer get attributes 



Signed-off-by: default avatarAlan Cox <alan@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 9f109694

Documentation/ABI/testing/sysfs-tty

+112 −0
Original line number Diff line number Diff line
@@ -26,3 +26,115 @@ Description: 
		 UART port in serial_core, that is bound to TTY like ttyS0.

		 uartclk = 16 * baud_base



		 These sysfs values expose the TIOCGSERIAL interface via

		 sysfs rather than via ioctls.



What:		/sys/class/tty/ttyS0/type

Date:		October 2012

Contact:	Alan Cox <alan@linux.intel.com>

Description:

		 Shows the current tty type for this port.



		 These sysfs values expose the TIOCGSERIAL interface via

		 sysfs rather than via ioctls.



What:		/sys/class/tty/ttyS0/line

Date:		October 2012

Contact:	Alan Cox <alan@linux.intel.com>

Description:

		 Shows the current tty line number for this port.



		 These sysfs values expose the TIOCGSERIAL interface via

		 sysfs rather than via ioctls.



What:		/sys/class/tty/ttyS0/port

Date:		October 2012

Contact:	Alan Cox <alan@linux.intel.com>

Description:

		 Shows the current tty port I/O address for this port.



		 These sysfs values expose the TIOCGSERIAL interface via

		 sysfs rather than via ioctls.



What:		/sys/class/tty/ttyS0/irq

Date:		October 2012

Contact:	Alan Cox <alan@linux.intel.com>

Description:

		 Shows the current primary interrupt for this port.



		 These sysfs values expose the TIOCGSERIAL interface via

		 sysfs rather than via ioctls.



What:		/sys/class/tty/ttyS0/flags

Date:		October 2012

Contact:	Alan Cox <alan@linux.intel.com>

Description:

		 Show the tty port status flags for this port.



		 These sysfs values expose the TIOCGSERIAL interface via

		 sysfs rather than via ioctls.



What:		/sys/class/tty/ttyS0/xmit_fifo_size

Date:		October 2012

Contact:	Alan Cox <alan@linux.intel.com>

Description:

		 Show the transmit FIFO size for this port.



		 These sysfs values expose the TIOCGSERIAL interface via

		 sysfs rather than via ioctls.



What:		/sys/class/tty/ttyS0/close_delay

Date:		October 2012

Contact:	Alan Cox <alan@linux.intel.com>

Description:

		 Show the closing delay time for this port in ms.



		 These sysfs values expose the TIOCGSERIAL interface via

		 sysfs rather than via ioctls.



What:		/sys/class/tty/ttyS0/closing_wait

Date:		October 2012

Contact:	Alan Cox <alan@linux.intel.com>

Description:

		 Show the close wait time for this port in ms.



		 These sysfs values expose the TIOCGSERIAL interface via

		 sysfs rather than via ioctls.



What:		/sys/class/tty/ttyS0/custom_divisor

Date:		October 2012

Contact:	Alan Cox <alan@linux.intel.com>

Description:

		 Show the custom divisor if any that is set on this port.



		 These sysfs values expose the TIOCGSERIAL interface via

		 sysfs rather than via ioctls.



What:		/sys/class/tty/ttyS0/io_type

Date:		October 2012

Contact:	Alan Cox <alan@linux.intel.com>

Description:

		 Show the I/O type that is to be used with the iomem base

		 address.



		 These sysfs values expose the TIOCGSERIAL interface via

		 sysfs rather than via ioctls.



What:		/sys/class/tty/ttyS0/iomem_base

Date:		October 2012

Contact:	Alan Cox <alan@linux.intel.com>

Description:

		 The I/O memory base for this port.



		 These sysfs values expose the TIOCGSERIAL interface via

		 sysfs rather than via ioctls.



What:		/sys/class/tty/ttyS0/iomem_reg_shift

Date:		October 2012

Contact:	Alan Cox <alan@linux.intel.com>

Description:

		 Show the register shift indicating the spacing to be used

		 for accesses on this iomem address.



		 These sysfs values expose the TIOCGSERIAL interface via

		 sysfs rather than via ioctls.

drivers/tty/serial/serial_core.c

+145 −0
Original line number Diff line number Diff line
@@ -2340,10 +2340,155 @@ static ssize_t uart_get_attr_uartclk(struct device *dev, 
	return snprintf(buf, PAGE_SIZE, "%d\n", tmp.baud_base * 16);

}



static ssize_t uart_get_attr_type(struct device *dev,

	struct device_attribute *attr, char *buf)

{

	struct serial_struct tmp;

	struct tty_port *port = dev_get_drvdata(dev);



	uart_get_info(port, &tmp);

	return snprintf(buf, PAGE_SIZE, "%d\n", tmp.type);

}

static ssize_t uart_get_attr_line(struct device *dev,

	struct device_attribute *attr, char *buf)

{

	struct serial_struct tmp;

	struct tty_port *port = dev_get_drvdata(dev);



	uart_get_info(port, &tmp);

	return snprintf(buf, PAGE_SIZE, "%d\n", tmp.line);

}



static ssize_t uart_get_attr_port(struct device *dev,

	struct device_attribute *attr, char *buf)

{

	struct serial_struct tmp;

	struct tty_port *port = dev_get_drvdata(dev);



	uart_get_info(port, &tmp);

	return snprintf(buf, PAGE_SIZE, "0x%lX\n", (unsigned long)(tmp.port | (tmp.port_high << HIGH_BITS_OFFSET)));

}



static ssize_t uart_get_attr_irq(struct device *dev,

	struct device_attribute *attr, char *buf)

{

	struct serial_struct tmp;

	struct tty_port *port = dev_get_drvdata(dev);



	uart_get_info(port, &tmp);

	return snprintf(buf, PAGE_SIZE, "%d\n", tmp.irq);

}



static ssize_t uart_get_attr_flags(struct device *dev,

	struct device_attribute *attr, char *buf)

{

	struct serial_struct tmp;

	struct tty_port *port = dev_get_drvdata(dev);



	uart_get_info(port, &tmp);

	return snprintf(buf, PAGE_SIZE, "0x%X\n", tmp.flags);

}



static ssize_t uart_get_attr_xmit_fifo_size(struct device *dev,

	struct device_attribute *attr, char *buf)

{

	struct serial_struct tmp;

	struct tty_port *port = dev_get_drvdata(dev);



	uart_get_info(port, &tmp);

	return snprintf(buf, PAGE_SIZE, "%d\n", tmp.xmit_fifo_size);

}





static ssize_t uart_get_attr_close_delay(struct device *dev,

	struct device_attribute *attr, char *buf)

{

	struct serial_struct tmp;

	struct tty_port *port = dev_get_drvdata(dev);



	uart_get_info(port, &tmp);

	return snprintf(buf, PAGE_SIZE, "%d\n", tmp.close_delay);

}





static ssize_t uart_get_attr_closing_wait(struct device *dev,

	struct device_attribute *attr, char *buf)

{

	struct serial_struct tmp;

	struct tty_port *port = dev_get_drvdata(dev);



	uart_get_info(port, &tmp);

	return snprintf(buf, PAGE_SIZE, "%d\n", tmp.closing_wait);

}



static ssize_t uart_get_attr_custom_divisor(struct device *dev,

	struct device_attribute *attr, char *buf)

{

	struct serial_struct tmp;

	struct tty_port *port = dev_get_drvdata(dev);



	uart_get_info(port, &tmp);

	return snprintf(buf, PAGE_SIZE, "%d\n", tmp.custom_divisor);

}



static ssize_t uart_get_attr_io_type(struct device *dev,

	struct device_attribute *attr, char *buf)

{

	struct serial_struct tmp;

	struct tty_port *port = dev_get_drvdata(dev);



	uart_get_info(port, &tmp);

	return snprintf(buf, PAGE_SIZE, "%d\n", tmp.io_type);

}



static ssize_t uart_get_attr_iomem_base(struct device *dev,

	struct device_attribute *attr, char *buf)

{

	struct serial_struct tmp;

	struct tty_port *port = dev_get_drvdata(dev);



	uart_get_info(port, &tmp);

	return snprintf(buf, PAGE_SIZE, "0x%lX\n", (unsigned long)tmp.iomem_base);

}



static ssize_t uart_get_attr_iomem_reg_shift(struct device *dev,

	struct device_attribute *attr, char *buf)

{

	struct serial_struct tmp;

	struct tty_port *port = dev_get_drvdata(dev);



	uart_get_info(port, &tmp);

	return snprintf(buf, PAGE_SIZE, "%d\n", tmp.iomem_reg_shift);

}



static DEVICE_ATTR(type, S_IRUSR | S_IRGRP, uart_get_attr_type, NULL);

static DEVICE_ATTR(line, S_IRUSR | S_IRGRP, uart_get_attr_line, NULL);

static DEVICE_ATTR(port, S_IRUSR | S_IRGRP, uart_get_attr_port, NULL);

static DEVICE_ATTR(irq, S_IRUSR | S_IRGRP, uart_get_attr_irq, NULL);

static DEVICE_ATTR(flags, S_IRUSR | S_IRGRP, uart_get_attr_flags, NULL);

static DEVICE_ATTR(xmit_fifo_size, S_IRUSR | S_IRGRP, uart_get_attr_xmit_fifo_size, NULL);

static DEVICE_ATTR(uartclk, S_IRUSR | S_IRGRP, uart_get_attr_uartclk, NULL);

static DEVICE_ATTR(close_delay, S_IRUSR | S_IRGRP, uart_get_attr_close_delay, NULL);

static DEVICE_ATTR(closing_wait, S_IRUSR | S_IRGRP, uart_get_attr_closing_wait, NULL);

static DEVICE_ATTR(custom_divisor, S_IRUSR | S_IRGRP, uart_get_attr_custom_divisor, NULL);

static DEVICE_ATTR(io_type, S_IRUSR | S_IRGRP, uart_get_attr_io_type, NULL);

static DEVICE_ATTR(iomem_base, S_IRUSR | S_IRGRP, uart_get_attr_iomem_base, NULL);

static DEVICE_ATTR(iomem_reg_shift, S_IRUSR | S_IRGRP, uart_get_attr_iomem_reg_shift, NULL);



static struct attribute *tty_dev_attrs[] = {

	&dev_attr_type.attr,

	&dev_attr_line.attr,

	&dev_attr_port.attr,

	&dev_attr_irq.attr,

	&dev_attr_flags.attr,

	&dev_attr_xmit_fifo_size.attr,

	&dev_attr_uartclk.attr,

	&dev_attr_close_delay.attr,

	&dev_attr_closing_wait.attr,

	&dev_attr_custom_divisor.attr,

	&dev_attr_io_type.attr,

	&dev_attr_iomem_base.attr,

	&dev_attr_iomem_reg_shift.attr,

	NULL,

	};

CRA Git | Maintained and supported by SUSTech CRA and CCSE