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sparc64: vcc: Add install & cleanup TTY operations 

Add handlers to support TTY install & cleanup operations

Signed-off-by: Jagannathan Raman <jag.raman@oracle.com>
Reviewed-by: Liam Merwick <liam.merwick@oracle.com>
Reviewed-by: Shannon Nelson <shannon.nelson@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jag Raman 2017-08-15 17:03:09 -04:00 committed by David S. Miller
parent e942e5775c
commit 8f03f948ba
1 changed files with 73 additions and 0 deletions
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73
drivers/tty/vcc.c
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@ -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)