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Message-ID: <3f4bc3ff-1e72-54ee-1047-c69a0ff45771@gmail.com>
Date: Thu, 30 Aug 2018 09:55:46 +0800
From: "Ji-Ze Hong (Peter Hong)" <hpeter@...il.com>
To: johan@...nel.org
Cc: gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
linux-kernel@...r.kernel.org, peter_hong@...tek.com.tw,
hpeter+linux_kernel@...il.com
Subject: Re: [PATCH V2 3/4] serial: f81232: implement break control
Hi Johan,
This article is duplication with
[PATCH V2 3/4] USB: serial: f81232: implement break control
[PATCH V2 3/4] serial: f81232: implement break control
(Title not start with USB token)
Should I discard this PATCH_V2 series and re-send PATCH_V3 ?
or could you discard the patch - serial: f81232: implement break control
only ?
Thanks
Ji-Ze Hong (Peter Hong) 於 2018/8/30 上午 09:47 寫道:
> Implement Fintek F81232 break on/off with LCR register.
> It's the same with 16550A LCR register layout.
>
> Signed-off-by: Ji-Ze Hong (Peter Hong) <hpeter+linux_kernel@...il.com>
> ---
> v2:
> 1: Fix f81232_break_ctl() for mis-operated set_mask_register().
> 2: Add set break control bit in f81232_set_termios().
>
> drivers/usb/serial/f81232.c | 32 ++++++++++++++++++++++++++------
> 1 file changed, 26 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/usb/serial/f81232.c b/drivers/usb/serial/f81232.c
> index 56adae8a9ee0..863430d7535f 100644
> --- a/drivers/usb/serial/f81232.c
> +++ b/drivers/usb/serial/f81232.c
> @@ -65,6 +65,7 @@ struct f81232_private {
> struct mutex lock;
> u8 modem_control;
> u8 modem_status;
> + bool is_break;
> speed_t baud_base;
> struct work_struct lsr_work;
> struct work_struct interrupt_work;
> @@ -377,13 +378,24 @@ static void f81232_process_read_urb(struct urb *urb)
>
> static void f81232_break_ctl(struct tty_struct *tty, int break_state)
> {
> - /* FIXME - Stubbed out for now */
> + struct usb_serial_port *port = tty->driver_data;
> + struct f81232_private *priv = usb_get_serial_port_data(port);
> + int status;
> + u8 tmp = 0;
>
> - /*
> - * break_state = -1 to turn on break, and 0 to turn off break
> - * see drivers/char/tty_io.c to see it used.
> - * last_set_data_urb_value NEVER has the break bit set in it.
> - */
> + mutex_lock(&priv->lock);
> +
> + if (break_state) {
> + priv->is_break = !!break_state;
> + tmp = UART_LCR_SBC;
> + }
> +
> + status = f81232_set_mask_register(port, LINE_CONTROL_REGISTER,
> + UART_LCR_SBC, tmp);
> + if (status)
> + dev_err(&port->dev, "set break failed: %d\n", status);
> +
> + mutex_unlock(&priv->lock);
> }
>
> static int f81232_find_clk(speed_t baudrate)
> @@ -519,6 +531,7 @@ static int f81232_port_disable(struct usb_serial_port *port)
> static void f81232_set_termios(struct tty_struct *tty,
> struct usb_serial_port *port, struct ktermios *old_termios)
> {
> + struct f81232_private *priv = usb_get_serial_port_data(port);
> u8 new_lcr = 0;
> int status = 0;
> speed_t baudrate;
> @@ -572,11 +585,18 @@ static void f81232_set_termios(struct tty_struct *tty,
> break;
> }
>
> + mutex_lock(&priv->lock);
> +
> + if (priv->is_break)
> + new_lcr |= UART_LCR_SBC;
> +
> status = f81232_set_register(port, LINE_CONTROL_REGISTER, new_lcr);
> if (status) {
> dev_err(&port->dev, "%s failed to set LCR: %d\n",
> __func__, status);
> }
> +
> + mutex_unlock(&priv->lock);
> }
>
> static int f81232_tiocmget(struct tty_struct *tty)
>
--
With Best Regards,
Peter Hong
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