From: "Ji-Ze Hong (Peter Hong)" <hpeter@gmail.com>
To: johan@kernel.org
Cc: gregkh@linuxfoundation.org, linux-usb@vger.kernel.org,
linux-kernel@vger.kernel.org, peter_hong@fintek.com.tw,
"Ji-Ze Hong (Peter Hong)" <hpeter+linux_kernel@gmail.com>
Subject: [PATCH V1 4/6] USB: serial: f81232: Add tx_empty function
Date: Thu, 6 Jun 2019 10:54:14 +0800 [thread overview]
Message-ID: <1559789656-15847-5-git-send-email-hpeter+linux_kernel@gmail.com> (raw)
In-Reply-To: <1559789656-15847-1-git-send-email-hpeter+linux_kernel@gmail.com>
Add tx_empty() function for F81232 & F81534A series.
Signed-off-by: Ji-Ze Hong (Peter Hong) <hpeter+linux_kernel@gmail.com>
---
drivers/usb/serial/f81232.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/drivers/usb/serial/f81232.c b/drivers/usb/serial/f81232.c
index e9470fb0d691..7d1ec8f9d168 100644
--- a/drivers/usb/serial/f81232.c
+++ b/drivers/usb/serial/f81232.c
@@ -850,6 +850,24 @@ static void f81232_dtr_rts(struct usb_serial_port *port, int on)
f81232_set_mctrl(port, 0, TIOCM_DTR | TIOCM_RTS);
}
+static bool f81232_tx_empty(struct usb_serial_port *port)
+{
+ int status;
+ u8 tmp;
+ u8 both_empty = UART_LSR_TEMT | UART_LSR_THRE;
+
+ status = f81232_get_register(port, LINE_STATUS_REGISTER, &tmp);
+ if (status) {
+ dev_err(&port->dev, "get LSR status failed: %d\n", status);
+ return false;
+ }
+
+ if ((tmp & both_empty) != both_empty)
+ return false;
+
+ return true;
+}
+
static int f81232_carrier_raised(struct usb_serial_port *port)
{
u8 msr;
@@ -1279,6 +1297,7 @@ static struct usb_serial_driver f81232_device = {
.tiocmget = f81232_tiocmget,
.tiocmset = f81232_tiocmset,
.tiocmiwait = usb_serial_generic_tiocmiwait,
+ .tx_empty = f81232_tx_empty,
.process_read_urb = f81232_read_urb_proxy,
.read_int_callback = f81232_read_int_callback,
.port_probe = f81232_port_probe,
--
2.7.4
next prev parent reply other threads:[~2019-06-06 2:55 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-06 2:54 [PATCH V1 0/6] USB: serial: f81232: Add F81534A support Ji-Ze Hong (Peter Hong)
2019-06-06 2:54 ` [PATCH V1 1/6] " Ji-Ze Hong (Peter Hong)
2019-08-28 14:56 ` Johan Hovold
2019-06-06 2:54 ` [PATCH V1 2/6] USB: serial: f81232: Force F81534A with RS232 mode Ji-Ze Hong (Peter Hong)
2019-08-28 14:58 ` Johan Hovold
2019-06-06 2:54 ` [PATCH V1 3/6] USB: serial: f81232: Add generator for F81534A Ji-Ze Hong (Peter Hong)
2019-08-28 15:02 ` Johan Hovold
2019-09-02 2:59 ` Ji-Ze Hong (Peter Hong)
2019-09-20 8:15 ` Johan Hovold
2019-06-06 2:54 ` Ji-Ze Hong (Peter Hong) [this message]
2019-08-28 15:16 ` [PATCH V1 4/6] USB: serial: f81232: Add tx_empty function Johan Hovold
2019-06-06 2:54 ` [PATCH V1 5/6] USB: serial: f81232: Use devm_kzalloc Ji-Ze Hong (Peter Hong)
2019-06-06 2:54 ` [PATCH V1 6/6] USB: serial: f81232: Add gpiolib to GPIO device Ji-Ze Hong (Peter Hong)
2019-08-28 15:37 ` Johan Hovold
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