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Date: Wed, 28 Jan 2015 13:58:16 +0800
From: Peter Hung <hpeter@...il.com>
To: johan@...nel.org
Cc: gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
linux-kernel@...r.kernel.org, tom_tsai@...tek.com.tw,
peter_hong@...tek.com.tw,
Peter Hung <hpeter+linux_kernel@...il.com>
Subject: [PATCH v3 3/5] usb: serial: implement function for F81232
This patch implement the following function:
set_termios, tiocmset, tiocmget, dtr_rts
Signed-off-by: Peter Hung <hpeter+linux_kernel@...il.com>
---
drivers/usb/serial/f81232.c | 103 ++++++++++++++++++++++++++++++++++++--------
1 file changed, 84 insertions(+), 19 deletions(-)
diff --git a/drivers/usb/serial/f81232.c b/drivers/usb/serial/f81232.c
index b372975..9a54f56 100644
--- a/drivers/usb/serial/f81232.c
+++ b/drivers/usb/serial/f81232.c
@@ -346,27 +346,99 @@ static void f81232_break_ctl(struct tty_struct *tty, int break_state)
static void f81232_set_termios(struct tty_struct *tty,
struct usb_serial_port *port, struct ktermios *old_termios)
{
- /* FIXME - Stubbed out for now */
+ u16 divisor;
+ u16 new_lcr = 0;
+ int status;
+ struct ktermios *termios = &tty->termios;
+ struct usb_device *dev = port->serial->dev;
+ unsigned int cflag = termios->c_cflag;
- /* Don't change anything if nothing has changed */
- if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios))
- return;
+ divisor = calc_baud_divisor(tty_get_baud_rate(tty));
+
+ status = f81232_set_register(dev, LINE_CONTROL_REGISTER,
+ UART_LCR_DLAB); /* DLAB */
+
+ status = f81232_set_register(dev, RECEIVE_BUFFER_REGISTER,
+ divisor & 0x00ff); /* low */
+
+ status = f81232_set_register(dev, INTERRUPT_ENABLE_REGISTER,
+ (divisor & 0xff00) >> 8); /* high */
+
+ status = f81232_set_register(dev, LINE_CONTROL_REGISTER, 0x00);
+
+
+ if (cflag & PARENB) {
+ if (cflag & PARODD)
+ new_lcr |= UART_LCR_PARITY; /* odd */
+ else
+ new_lcr |= SERIAL_EVEN_PARITY; /* even */
+ }
+
+ if (cflag & CSTOPB)
+ new_lcr |= UART_LCR_STOP;
+ else
+ new_lcr &= ~UART_LCR_STOP;
+
+ switch (cflag & CSIZE) {
+ case CS5:
+ new_lcr |= UART_LCR_WLEN5;
+ break;
+ case CS6:
+ new_lcr |= UART_LCR_WLEN6;
+ break;
+ case CS7:
+ new_lcr |= UART_LCR_WLEN7;
+ break;
+ default:
+ case CS8:
+ new_lcr |= UART_LCR_WLEN8;
+ break;
+ }
+
+ status |= f81232_set_register(dev, LINE_CONTROL_REGISTER, new_lcr);
+
+ status |= f81232_set_register(dev, FIFO_CONTROL_REGISTER,
+ 0x87); /* fifo, trigger8 */
+ status |= f81232_set_register(dev,
+ INTERRUPT_ENABLE_REGISTER, 0xf); /* IER */
+
+ if (status < 0)
+ dev_err(&port->dev, "LINE_CONTROL_REGISTER set error: %d\n",
+ status);
- /* Do the real work here... */
- if (old_termios)
- tty_termios_copy_hw(&tty->termios, old_termios);
}
static int f81232_tiocmget(struct tty_struct *tty)
{
- /* FIXME - Stubbed out for now */
- return 0;
+ int r;
+ struct usb_serial_port *port = tty->driver_data;
+ struct f81232_private *port_priv = usb_get_serial_port_data(port);
+ unsigned long flags;
+ u8 mcr, msr;
+
+ spin_lock_irqsave(&port_priv->lock, flags);
+ mcr = port_priv->line_control;
+ msr = port_priv->line_status;
+ spin_unlock_irqrestore(&port_priv->lock, flags);
+
+ r = (mcr & UART_MCR_DTR ? TIOCM_DTR : 0) |
+ (mcr & UART_MCR_RTS ? TIOCM_RTS : 0) |
+ (msr & UART_MSR_CTS ? TIOCM_CTS : 0) |
+ (msr & UART_MSR_DCD ? TIOCM_CAR : 0) |
+ (msr & UART_MSR_RI ? TIOCM_RI : 0) |
+ (msr & UART_MSR_DSR ? TIOCM_DSR : 0);
+
+ return r;
}
static int f81232_tiocmset(struct tty_struct *tty,
unsigned int set, unsigned int clear)
{
- /* FIXME - Stubbed out for now */
+ struct usb_serial_port *port = tty->driver_data;
+ struct f81232_private *port_priv =
+ usb_get_serial_port_data(port);
+
+ update_mctrl(port_priv, set, clear);
return 0;
}
@@ -403,18 +475,11 @@ static void f81232_close(struct usb_serial_port *port)
static void f81232_dtr_rts(struct usb_serial_port *port, int on)
{
struct f81232_private *priv = usb_get_serial_port_data(port);
- unsigned long flags;
- u8 control;
- spin_lock_irqsave(&priv->lock, flags);
- /* Change DTR and RTS */
if (on)
- priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
+ update_mctrl(priv, TIOCM_DTR | TIOCM_RTS, 0);
else
- priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
- control = priv->line_control;
- spin_unlock_irqrestore(&priv->lock, flags);
- set_control_lines(port->serial->dev, control);
+ update_mctrl(priv, 0, TIOCM_DTR | TIOCM_RTS);
}
static int f81232_carrier_raised(struct usb_serial_port *port)
--
1.9.1
--
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