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Date: Tue, 2 Nov 2021 15:05:07 +0800
From: Zijun Hu <zijuhu@...eaurora.org>
To: robh@...nel.org, gregkh@...uxfoundation.org, jirislaby@...nel.org
Cc: linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-bluetooth@...r.kernel.org, zijuhu@...eaurora.org,
Zijun Hu <quic_zijuhu@...cinc.com>
Subject: [PATCH v1 1/3] serdev: Add interface serdev_device_ioctl
From: Zijun Hu <quic_zijuhu@...cinc.com>
For serdev_device which is mounted at virtual tty port, tty ioctl()
maybe be used to make serdev_device ready to talk with tty port, so
add interface serdev_device_ioctl().
Signed-off-by: Zijun Hu <quic_zijuhu@...cinc.com>
---
drivers/tty/serdev/core.c | 13 +++++++++++++
drivers/tty/serdev/serdev-ttyport.c | 12 ++++++++++++
include/linux/serdev.h | 9 +++++++++
3 files changed, 34 insertions(+)
diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c
index f1324fe99378..dee934203277 100644
--- a/drivers/tty/serdev/core.c
+++ b/drivers/tty/serdev/core.c
@@ -405,6 +405,19 @@ int serdev_device_set_tiocm(struct serdev_device *serdev, int set, int clear)
}
EXPORT_SYMBOL_GPL(serdev_device_set_tiocm);
+int serdev_device_ioctl(struct serdev_device *serdev, unsigned int cmd, unsigned long arg)
+{
+ struct serdev_controller *ctrl = serdev->ctrl;
+
+ if (!ctrl)
+ return -ENOTTY;
+ else if (!ctrl->ops->ioctl)
+ return -ENOSYS;
+ else
+ return ctrl->ops->ioctl(ctrl, cmd, arg);
+}
+EXPORT_SYMBOL_GPL(serdev_device_ioctl);
+
static int serdev_drv_probe(struct device *dev)
{
const struct serdev_device_driver *sdrv = to_serdev_device_driver(dev->driver);
diff --git a/drivers/tty/serdev/serdev-ttyport.c b/drivers/tty/serdev/serdev-ttyport.c
index d367803e2044..66afad1eb1b7 100644
--- a/drivers/tty/serdev/serdev-ttyport.c
+++ b/drivers/tty/serdev/serdev-ttyport.c
@@ -247,6 +247,17 @@ static int ttyport_set_tiocm(struct serdev_controller *ctrl, unsigned int set, u
return tty->ops->tiocmset(tty, set, clear);
}
+static int ttyport_ioctl(struct serdev_controller *ctrl, unsigned int cmd, unsigned long arg)
+{
+ struct serport *serport = serdev_controller_get_drvdata(ctrl);
+ struct tty_struct *tty = serport->tty;
+
+ if (!tty->ops->ioctl)
+ return -ENOSYS;
+
+ return tty->ops->ioctl(tty, cmd, arg);
+}
+
static const struct serdev_controller_ops ctrl_ops = {
.write_buf = ttyport_write_buf,
.write_flush = ttyport_write_flush,
@@ -259,6 +270,7 @@ static const struct serdev_controller_ops ctrl_ops = {
.wait_until_sent = ttyport_wait_until_sent,
.get_tiocm = ttyport_get_tiocm,
.set_tiocm = ttyport_set_tiocm,
+ .ioctl = ttyport_ioctl,
};
struct device *serdev_tty_port_register(struct tty_port *port,
diff --git a/include/linux/serdev.h b/include/linux/serdev.h
index 3368c261ab62..5804201fafb2 100644
--- a/include/linux/serdev.h
+++ b/include/linux/serdev.h
@@ -91,6 +91,7 @@ struct serdev_controller_ops {
void (*wait_until_sent)(struct serdev_controller *, long);
int (*get_tiocm)(struct serdev_controller *);
int (*set_tiocm)(struct serdev_controller *, unsigned int, unsigned int);
+ int (*ioctl)(struct serdev_controller *ctrl, unsigned int cmd, unsigned long arg);
};
/**
@@ -201,6 +202,7 @@ int serdev_device_write_buf(struct serdev_device *, const unsigned char *, size_
void serdev_device_wait_until_sent(struct serdev_device *, long);
int serdev_device_get_tiocm(struct serdev_device *);
int serdev_device_set_tiocm(struct serdev_device *, int, int);
+int serdev_device_ioctl(struct serdev_device *serdev, unsigned int cmd, unsigned long arg);
void serdev_device_write_wakeup(struct serdev_device *);
int serdev_device_write(struct serdev_device *, const unsigned char *, size_t, long);
void serdev_device_write_flush(struct serdev_device *);
@@ -254,6 +256,13 @@ static inline int serdev_device_set_tiocm(struct serdev_device *serdev, int set,
{
return -ENOTSUPP;
}
+
+static inline int serdev_device_ioctl(struct serdev_device *serdev,
+ unsigned int cmd, unsigned long arg)
+{
+ return -ENOSYS;
+}
+
static inline int serdev_device_write(struct serdev_device *sdev, const unsigned char *buf,
size_t count, unsigned long timeout)
{
--
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