static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
{
struct usb_serial *serial = port->serial;
int result;
dbg("%s - port %d", __func__, port->number);
if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) {
dev_err(&port->dev, "%s - Unable to enable UART\n",
__func__);
return -EPROTO;
}
/* Start reading from the device */
usb_fill_bulk_urb(port->read_urb, serial->dev,
usb_rcvbulkpipe(serial->dev,
port->bulk_in_endpointAddress),
port->read_urb->transfer_buffer,
port->read_urb->transfer_buffer_length,
serial->type->read_bulk_callback,
port);
result = usb_submit_urb(port->read_urb, GFP_KERNEL);
if (result) {
dev_err(&port->dev, "%s - failed resubmitting read urb, "
"error %d\n", __func__, result);
return result;
}
/* Configure the termios structure */
cp210x_get_termios(tty, port);
return 0;
}
static void cp210x_close(struct usb_serial_port *port)
{
dbg("%s - port %d", __func__, port->number);
usb_serial_generic_close(port);
mutex_lock(&port->serial->disc_mutex);
if (!port->serial->disconnected)
cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
mutex_unlock(&port->serial->disc_mutex);
}
static void cp210x_close(struct usb_serial_port *port)
{
dbg("%s - port %d", __func__, port->number);
/* shutdown our urbs */
dbg("%s - shutting down urbs", __func__);
usb_kill_urb(port->write_urb);
usb_kill_urb(port->read_urb);
mutex_lock(&port->serial->disc_mutex);
if (!port->serial->disconnected)
cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
mutex_unlock(&port->serial->disc_mutex);
}
static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
{
dbg("%s - port %d", __func__, port->number);
if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) {
dev_err(&port->dev, "%s - Unable to enable UART\n",
__func__);
return -EPROTO;
}
/* Configure the termios structure */
cp210x_get_termios(tty, port);
/* The baud rate must be initialised on cp2104 */
if (tty)
cp210x_change_speed(tty, port, NULL);
return usb_serial_generic_open(tty, port);
}
static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
{
int result;
dbg("%s - port %d", __func__, port->number);
if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) {
dev_err(&port->dev, "%s - Unable to enable UART\n",
__func__);
return -EPROTO;
}
result = usb_serial_generic_open(tty, port);
if (result)
return result;
/* Configure the termios structure */
cp210x_get_termios(tty, port);
return 0;
}
static void cp210x_set_termios(struct tty_struct *tty,
struct usb_serial_port *port, struct ktermios *old_termios)
{
unsigned int cflag, old_cflag;
unsigned int baud = 0, bits;
unsigned int modem_ctl[4];
dbg("%s - port %d", __func__, port->number);
if (!tty)
return;
tty->termios->c_cflag &= ~CMSPAR;
cflag = tty->termios->c_cflag;
old_cflag = old_termios->c_cflag;
baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty));
/* If the baud rate is to be updated*/
if (baud != tty_termios_baud_rate(old_termios) && baud != 0) {
dbg("%s - Setting baud rate to %d baud", __func__,
baud);
if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV,
((BAUD_RATE_GEN_FREQ + baud/2) / baud))) {
dbg("Baud rate requested not supported by device");
baud = tty_termios_baud_rate(old_termios);
}
}
/* Report back the resulting baud rate */
tty_encode_baud_rate(tty, baud, baud);
/* If the number of data bits is to be updated */
if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
bits &= ~BITS_DATA_MASK;
switch (cflag & CSIZE) {
case CS5:
bits |= BITS_DATA_5;
dbg("%s - data bits = 5", __func__);
break;
case CS6:
bits |= BITS_DATA_6;
dbg("%s - data bits = 6", __func__);
break;
case CS7:
bits |= BITS_DATA_7;
dbg("%s - data bits = 7", __func__);
break;
case CS8:
bits |= BITS_DATA_8;
dbg("%s - data bits = 8", __func__);
break;
/*case CS9:
bits |= BITS_DATA_9;
dbg("%s - data bits = 9", __func__);
break;*/
default:
dbg("cp210x driver does not "
"support the number of bits requested,"
" using 8 bit mode\n");
bits |= BITS_DATA_8;
break;
}
if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
dbg("Number of data bits requested "
"not supported by device\n");
}
if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) {
cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
bits &= ~BITS_PARITY_MASK;
if (cflag & PARENB) {
if (cflag & PARODD) {
bits |= BITS_PARITY_ODD;
dbg("%s - parity = ODD", __func__);
} else {
bits |= BITS_PARITY_EVEN;
dbg("%s - parity = EVEN", __func__);
}
}
if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
dbg("Parity mode not supported "
"by device\n");
}
if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
bits &= ~BITS_STOP_MASK;
if (cflag & CSTOPB) {
bits |= BITS_STOP_2;
dbg("%s - stop bits = 2", __func__);
} else {
bits |= BITS_STOP_1;
dbg("%s - stop bits = 1", __func__);
}
if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
dbg("Number of stop bits requested "
"not supported by device\n");
}
if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
__func__, modem_ctl[0], modem_ctl[1],
modem_ctl[2], modem_ctl[3]);
if (cflag & CRTSCTS) {
modem_ctl[0] &= ~0x7B;
modem_ctl[0] |= 0x09;
modem_ctl[1] = 0x80;
dbg("%s - flow control = CRTSCTS", __func__);
} else {
modem_ctl[0] &= ~0x7B;
modem_ctl[0] |= 0x01;
modem_ctl[1] |= 0x40;
dbg("%s - flow control = NONE", __func__);
}
dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
__func__, modem_ctl[0], modem_ctl[1],
modem_ctl[2], modem_ctl[3]);
cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
}
}
