Commit 8f03f948 authored by Jag Raman's avatar Jag Raman Committed by David S. Miller
Browse files

sparc64: vcc: Add install & cleanup TTY operations 



Add handlers to support TTY install & cleanup operations

Signed-off-by: default avatarJagannathan Raman <jag.raman@oracle.com>
Reviewed-by: default avatarLiam Merwick <liam.merwick@oracle.com>
Reviewed-by: default avatarShannon Nelson <shannon.nelson@oracle.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent e942e577

drivers/tty/vcc.c

+73 −0
Original line number Diff line number Diff line
@@ -487,6 +487,8 @@ static struct vio_version vcc_versions[] = { 
	{ .major = 1, .minor = 0 },

};



static struct tty_port_operations vcc_port_ops = { 0 };



static ssize_t vcc_sysfs_domain_show(struct device *dev,

				     struct device_attribute *attr,

				     char *buf)
@@ -994,6 +996,75 @@ static int vcc_break_ctl(struct tty_struct *tty, int state) 
	return 0;

}



static int vcc_install(struct tty_driver *driver, struct tty_struct *tty)

{

	struct vcc_port *port_vcc;

	struct tty_port *port_tty;

	int ret;



	if (unlikely(!tty)) {

		pr_err("VCC: install: Invalid TTY handle\n");

		return -ENXIO;

	}



	if (tty->index >= VCC_MAX_PORTS)

		return -EINVAL;



	ret = tty_standard_install(driver, tty);

	if (ret)

		return ret;



	port_tty = kzalloc(sizeof(struct tty_port), GFP_KERNEL);

	if (!port_tty)

		return -ENOMEM;



	port_vcc = vcc_get(tty->index, true);

	if (!port_vcc) {

		pr_err("VCC: install: Failed to find VCC port\n");

		tty->port = NULL;

		kfree(port_tty);

		return -ENODEV;

	}



	tty_port_init(port_tty);

	port_tty->ops = &vcc_port_ops;

	tty->port = port_tty;



	port_vcc->tty = tty;



	vcc_put(port_vcc, true);



	return 0;

}



static void vcc_cleanup(struct tty_struct *tty)

{

	struct vcc_port *port;



	if (unlikely(!tty)) {

		pr_err("VCC: cleanup: Invalid TTY handle\n");

		return;

	}



	port = vcc_get(tty->index, true);

	if (port) {

		port->tty = NULL;



		if (port->removed) {

			vcc_table_remove(tty->index);

			kfree(port->vio.name);

			kfree(port->domain);

			kfree(port);

		} else {

			vcc_put(port, true);

		}

	}



	tty_port_destroy(tty->port);

	kfree(tty->port);

	tty->port = NULL;

}



static const struct tty_operations vcc_ops = {

	.open			= vcc_open,

	.close			= vcc_close,
@@ -1002,6 +1073,8 @@ static const struct tty_operations vcc_ops = { 
	.write_room		= vcc_write_room,

	.chars_in_buffer	= vcc_chars_in_buffer,

	.break_ctl		= vcc_break_ctl,

	.install		= vcc_install,

	.cleanup		= vcc_cleanup,

};



#define VCC_TTY_FLAGS   (TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_REAL_RAW)