mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 01:10:04 +00:00
![Paul Gortmaker](/assets/img/avatar_default.png)
None of these files are actually using any __init type directives and hence don't need to include <linux/init.h>. Most are just a left over from __devinit and __cpuinit removal, or simply due to code getting copied from one driver to the next. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
771 lines
22 KiB
C
771 lines
22 KiB
C
/*
|
|
* MCT (Magic Control Technology Corp.) USB RS232 Converter Driver
|
|
*
|
|
* Copyright (C) 2000 Wolfgang Grandegger (wolfgang@ces.ch)
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is largely derived from the Belkin USB Serial Adapter Driver
|
|
* (see belkin_sa.[ch]). All of the information about the device was acquired
|
|
* by using SniffUSB on Windows98. For technical details see mct_u232.h.
|
|
*
|
|
* William G. Greathouse and Greg Kroah-Hartman provided great help on how to
|
|
* do the reverse engineering and how to write a USB serial device driver.
|
|
*
|
|
* TO BE DONE, TO BE CHECKED:
|
|
* DTR/RTS signal handling may be incomplete or incorrect. I have mainly
|
|
* implemented what I have seen with SniffUSB or found in belkin_sa.c.
|
|
* For further TODOs check also belkin_sa.c.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/tty.h>
|
|
#include <linux/tty_driver.h>
|
|
#include <linux/tty_flip.h>
|
|
#include <linux/module.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/uaccess.h>
|
|
#include <asm/unaligned.h>
|
|
#include <linux/usb.h>
|
|
#include <linux/usb/serial.h>
|
|
#include <linux/serial.h>
|
|
#include "mct_u232.h"
|
|
|
|
#define DRIVER_AUTHOR "Wolfgang Grandegger <wolfgang@ces.ch>"
|
|
#define DRIVER_DESC "Magic Control Technology USB-RS232 converter driver"
|
|
|
|
/*
|
|
* Function prototypes
|
|
*/
|
|
static int mct_u232_port_probe(struct usb_serial_port *port);
|
|
static int mct_u232_port_remove(struct usb_serial_port *remove);
|
|
static int mct_u232_open(struct tty_struct *tty, struct usb_serial_port *port);
|
|
static void mct_u232_close(struct usb_serial_port *port);
|
|
static void mct_u232_dtr_rts(struct usb_serial_port *port, int on);
|
|
static void mct_u232_read_int_callback(struct urb *urb);
|
|
static void mct_u232_set_termios(struct tty_struct *tty,
|
|
struct usb_serial_port *port, struct ktermios *old);
|
|
static void mct_u232_break_ctl(struct tty_struct *tty, int break_state);
|
|
static int mct_u232_tiocmget(struct tty_struct *tty);
|
|
static int mct_u232_tiocmset(struct tty_struct *tty,
|
|
unsigned int set, unsigned int clear);
|
|
static void mct_u232_throttle(struct tty_struct *tty);
|
|
static void mct_u232_unthrottle(struct tty_struct *tty);
|
|
|
|
|
|
/*
|
|
* All of the device info needed for the MCT USB-RS232 converter.
|
|
*/
|
|
static const struct usb_device_id id_table[] = {
|
|
{ USB_DEVICE(MCT_U232_VID, MCT_U232_PID) },
|
|
{ USB_DEVICE(MCT_U232_VID, MCT_U232_SITECOM_PID) },
|
|
{ USB_DEVICE(MCT_U232_VID, MCT_U232_DU_H3SP_PID) },
|
|
{ USB_DEVICE(MCT_U232_BELKIN_F5U109_VID, MCT_U232_BELKIN_F5U109_PID) },
|
|
{ } /* Terminating entry */
|
|
};
|
|
MODULE_DEVICE_TABLE(usb, id_table);
|
|
|
|
static struct usb_serial_driver mct_u232_device = {
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "mct_u232",
|
|
},
|
|
.description = "MCT U232",
|
|
.id_table = id_table,
|
|
.num_ports = 1,
|
|
.open = mct_u232_open,
|
|
.close = mct_u232_close,
|
|
.dtr_rts = mct_u232_dtr_rts,
|
|
.throttle = mct_u232_throttle,
|
|
.unthrottle = mct_u232_unthrottle,
|
|
.read_int_callback = mct_u232_read_int_callback,
|
|
.set_termios = mct_u232_set_termios,
|
|
.break_ctl = mct_u232_break_ctl,
|
|
.tiocmget = mct_u232_tiocmget,
|
|
.tiocmset = mct_u232_tiocmset,
|
|
.tiocmiwait = usb_serial_generic_tiocmiwait,
|
|
.port_probe = mct_u232_port_probe,
|
|
.port_remove = mct_u232_port_remove,
|
|
.get_icount = usb_serial_generic_get_icount,
|
|
};
|
|
|
|
static struct usb_serial_driver * const serial_drivers[] = {
|
|
&mct_u232_device, NULL
|
|
};
|
|
|
|
struct mct_u232_private {
|
|
struct urb *read_urb;
|
|
spinlock_t lock;
|
|
unsigned int control_state; /* Modem Line Setting (TIOCM) */
|
|
unsigned char last_lcr; /* Line Control Register */
|
|
unsigned char last_lsr; /* Line Status Register */
|
|
unsigned char last_msr; /* Modem Status Register */
|
|
unsigned int rx_flags; /* Throttling flags */
|
|
};
|
|
|
|
#define THROTTLED 0x01
|
|
|
|
/*
|
|
* Handle vendor specific USB requests
|
|
*/
|
|
|
|
#define WDR_TIMEOUT 5000 /* default urb timeout */
|
|
|
|
/*
|
|
* Later day 2.6.0-test kernels have new baud rates like B230400 which
|
|
* we do not know how to support. We ignore them for the moment.
|
|
*/
|
|
static int mct_u232_calculate_baud_rate(struct usb_serial *serial,
|
|
speed_t value, speed_t *result)
|
|
{
|
|
*result = value;
|
|
|
|
if (le16_to_cpu(serial->dev->descriptor.idProduct) == MCT_U232_SITECOM_PID
|
|
|| le16_to_cpu(serial->dev->descriptor.idProduct) == MCT_U232_BELKIN_F5U109_PID) {
|
|
switch (value) {
|
|
case 300:
|
|
return 0x01;
|
|
case 600:
|
|
return 0x02; /* this one not tested */
|
|
case 1200:
|
|
return 0x03;
|
|
case 2400:
|
|
return 0x04;
|
|
case 4800:
|
|
return 0x06;
|
|
case 9600:
|
|
return 0x08;
|
|
case 19200:
|
|
return 0x09;
|
|
case 38400:
|
|
return 0x0a;
|
|
case 57600:
|
|
return 0x0b;
|
|
case 115200:
|
|
return 0x0c;
|
|
default:
|
|
*result = 9600;
|
|
return 0x08;
|
|
}
|
|
} else {
|
|
/* FIXME: Can we use any divider - should we do
|
|
divider = 115200/value;
|
|
real baud = 115200/divider */
|
|
switch (value) {
|
|
case 300: break;
|
|
case 600: break;
|
|
case 1200: break;
|
|
case 2400: break;
|
|
case 4800: break;
|
|
case 9600: break;
|
|
case 19200: break;
|
|
case 38400: break;
|
|
case 57600: break;
|
|
case 115200: break;
|
|
default:
|
|
value = 9600;
|
|
*result = 9600;
|
|
}
|
|
return 115200/value;
|
|
}
|
|
}
|
|
|
|
static int mct_u232_set_baud_rate(struct tty_struct *tty,
|
|
struct usb_serial *serial, struct usb_serial_port *port, speed_t value)
|
|
{
|
|
unsigned int divisor;
|
|
int rc;
|
|
unsigned char *buf;
|
|
unsigned char cts_enable_byte = 0;
|
|
speed_t speed;
|
|
|
|
buf = kmalloc(MCT_U232_MAX_SIZE, GFP_KERNEL);
|
|
if (buf == NULL)
|
|
return -ENOMEM;
|
|
|
|
divisor = mct_u232_calculate_baud_rate(serial, value, &speed);
|
|
put_unaligned_le32(cpu_to_le32(divisor), buf);
|
|
rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
|
|
MCT_U232_SET_BAUD_RATE_REQUEST,
|
|
MCT_U232_SET_REQUEST_TYPE,
|
|
0, 0, buf, MCT_U232_SET_BAUD_RATE_SIZE,
|
|
WDR_TIMEOUT);
|
|
if (rc < 0) /*FIXME: What value speed results */
|
|
dev_err(&port->dev, "Set BAUD RATE %d failed (error = %d)\n",
|
|
value, rc);
|
|
else
|
|
tty_encode_baud_rate(tty, speed, speed);
|
|
dev_dbg(&port->dev, "set_baud_rate: value: 0x%x, divisor: 0x%x\n", value, divisor);
|
|
|
|
/* Mimic the MCT-supplied Windows driver (version 1.21P.0104), which
|
|
always sends two extra USB 'device request' messages after the
|
|
'baud rate change' message. The actual functionality of the
|
|
request codes in these messages is not fully understood but these
|
|
particular codes are never seen in any operation besides a baud
|
|
rate change. Both of these messages send a single byte of data.
|
|
In the first message, the value of this byte is always zero.
|
|
|
|
The second message has been determined experimentally to control
|
|
whether data will be transmitted to a device which is not asserting
|
|
the 'CTS' signal. If the second message's data byte is zero, data
|
|
will be transmitted even if 'CTS' is not asserted (i.e. no hardware
|
|
flow control). if the second message's data byte is nonzero (a
|
|
value of 1 is used by this driver), data will not be transmitted to
|
|
a device which is not asserting 'CTS'.
|
|
*/
|
|
|
|
buf[0] = 0;
|
|
rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
|
|
MCT_U232_SET_UNKNOWN1_REQUEST,
|
|
MCT_U232_SET_REQUEST_TYPE,
|
|
0, 0, buf, MCT_U232_SET_UNKNOWN1_SIZE,
|
|
WDR_TIMEOUT);
|
|
if (rc < 0)
|
|
dev_err(&port->dev, "Sending USB device request code %d "
|
|
"failed (error = %d)\n", MCT_U232_SET_UNKNOWN1_REQUEST,
|
|
rc);
|
|
|
|
if (port && C_CRTSCTS(tty))
|
|
cts_enable_byte = 1;
|
|
|
|
dev_dbg(&port->dev, "set_baud_rate: send second control message, data = %02X\n",
|
|
cts_enable_byte);
|
|
buf[0] = cts_enable_byte;
|
|
rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
|
|
MCT_U232_SET_CTS_REQUEST,
|
|
MCT_U232_SET_REQUEST_TYPE,
|
|
0, 0, buf, MCT_U232_SET_CTS_SIZE,
|
|
WDR_TIMEOUT);
|
|
if (rc < 0)
|
|
dev_err(&port->dev, "Sending USB device request code %d "
|
|
"failed (error = %d)\n", MCT_U232_SET_CTS_REQUEST, rc);
|
|
|
|
kfree(buf);
|
|
return rc;
|
|
} /* mct_u232_set_baud_rate */
|
|
|
|
static int mct_u232_set_line_ctrl(struct usb_serial_port *port,
|
|
unsigned char lcr)
|
|
{
|
|
int rc;
|
|
unsigned char *buf;
|
|
|
|
buf = kmalloc(MCT_U232_MAX_SIZE, GFP_KERNEL);
|
|
if (buf == NULL)
|
|
return -ENOMEM;
|
|
|
|
buf[0] = lcr;
|
|
rc = usb_control_msg(port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0),
|
|
MCT_U232_SET_LINE_CTRL_REQUEST,
|
|
MCT_U232_SET_REQUEST_TYPE,
|
|
0, 0, buf, MCT_U232_SET_LINE_CTRL_SIZE,
|
|
WDR_TIMEOUT);
|
|
if (rc < 0)
|
|
dev_err(&port->dev, "Set LINE CTRL 0x%x failed (error = %d)\n", lcr, rc);
|
|
dev_dbg(&port->dev, "set_line_ctrl: 0x%x\n", lcr);
|
|
kfree(buf);
|
|
return rc;
|
|
} /* mct_u232_set_line_ctrl */
|
|
|
|
static int mct_u232_set_modem_ctrl(struct usb_serial_port *port,
|
|
unsigned int control_state)
|
|
{
|
|
int rc;
|
|
unsigned char mcr;
|
|
unsigned char *buf;
|
|
|
|
buf = kmalloc(MCT_U232_MAX_SIZE, GFP_KERNEL);
|
|
if (buf == NULL)
|
|
return -ENOMEM;
|
|
|
|
mcr = MCT_U232_MCR_NONE;
|
|
if (control_state & TIOCM_DTR)
|
|
mcr |= MCT_U232_MCR_DTR;
|
|
if (control_state & TIOCM_RTS)
|
|
mcr |= MCT_U232_MCR_RTS;
|
|
|
|
buf[0] = mcr;
|
|
rc = usb_control_msg(port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0),
|
|
MCT_U232_SET_MODEM_CTRL_REQUEST,
|
|
MCT_U232_SET_REQUEST_TYPE,
|
|
0, 0, buf, MCT_U232_SET_MODEM_CTRL_SIZE,
|
|
WDR_TIMEOUT);
|
|
kfree(buf);
|
|
|
|
dev_dbg(&port->dev, "set_modem_ctrl: state=0x%x ==> mcr=0x%x\n", control_state, mcr);
|
|
|
|
if (rc < 0) {
|
|
dev_err(&port->dev, "Set MODEM CTRL 0x%x failed (error = %d)\n", mcr, rc);
|
|
return rc;
|
|
}
|
|
return 0;
|
|
} /* mct_u232_set_modem_ctrl */
|
|
|
|
static int mct_u232_get_modem_stat(struct usb_serial_port *port,
|
|
unsigned char *msr)
|
|
{
|
|
int rc;
|
|
unsigned char *buf;
|
|
|
|
buf = kmalloc(MCT_U232_MAX_SIZE, GFP_KERNEL);
|
|
if (buf == NULL) {
|
|
*msr = 0;
|
|
return -ENOMEM;
|
|
}
|
|
rc = usb_control_msg(port->serial->dev, usb_rcvctrlpipe(port->serial->dev, 0),
|
|
MCT_U232_GET_MODEM_STAT_REQUEST,
|
|
MCT_U232_GET_REQUEST_TYPE,
|
|
0, 0, buf, MCT_U232_GET_MODEM_STAT_SIZE,
|
|
WDR_TIMEOUT);
|
|
if (rc < 0) {
|
|
dev_err(&port->dev, "Get MODEM STATus failed (error = %d)\n", rc);
|
|
*msr = 0;
|
|
} else {
|
|
*msr = buf[0];
|
|
}
|
|
dev_dbg(&port->dev, "get_modem_stat: 0x%x\n", *msr);
|
|
kfree(buf);
|
|
return rc;
|
|
} /* mct_u232_get_modem_stat */
|
|
|
|
static void mct_u232_msr_to_icount(struct async_icount *icount,
|
|
unsigned char msr)
|
|
{
|
|
/* Translate Control Line states */
|
|
if (msr & MCT_U232_MSR_DDSR)
|
|
icount->dsr++;
|
|
if (msr & MCT_U232_MSR_DCTS)
|
|
icount->cts++;
|
|
if (msr & MCT_U232_MSR_DRI)
|
|
icount->rng++;
|
|
if (msr & MCT_U232_MSR_DCD)
|
|
icount->dcd++;
|
|
} /* mct_u232_msr_to_icount */
|
|
|
|
static void mct_u232_msr_to_state(struct usb_serial_port *port,
|
|
unsigned int *control_state, unsigned char msr)
|
|
{
|
|
/* Translate Control Line states */
|
|
if (msr & MCT_U232_MSR_DSR)
|
|
*control_state |= TIOCM_DSR;
|
|
else
|
|
*control_state &= ~TIOCM_DSR;
|
|
if (msr & MCT_U232_MSR_CTS)
|
|
*control_state |= TIOCM_CTS;
|
|
else
|
|
*control_state &= ~TIOCM_CTS;
|
|
if (msr & MCT_U232_MSR_RI)
|
|
*control_state |= TIOCM_RI;
|
|
else
|
|
*control_state &= ~TIOCM_RI;
|
|
if (msr & MCT_U232_MSR_CD)
|
|
*control_state |= TIOCM_CD;
|
|
else
|
|
*control_state &= ~TIOCM_CD;
|
|
dev_dbg(&port->dev, "msr_to_state: msr=0x%x ==> state=0x%x\n", msr, *control_state);
|
|
} /* mct_u232_msr_to_state */
|
|
|
|
/*
|
|
* Driver's tty interface functions
|
|
*/
|
|
|
|
static int mct_u232_port_probe(struct usb_serial_port *port)
|
|
{
|
|
struct mct_u232_private *priv;
|
|
|
|
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
|
|
if (!priv)
|
|
return -ENOMEM;
|
|
|
|
/* Use second interrupt-in endpoint for reading. */
|
|
priv->read_urb = port->serial->port[1]->interrupt_in_urb;
|
|
priv->read_urb->context = port;
|
|
|
|
spin_lock_init(&priv->lock);
|
|
|
|
usb_set_serial_port_data(port, priv);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mct_u232_port_remove(struct usb_serial_port *port)
|
|
{
|
|
struct mct_u232_private *priv;
|
|
|
|
priv = usb_get_serial_port_data(port);
|
|
kfree(priv);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mct_u232_open(struct tty_struct *tty, struct usb_serial_port *port)
|
|
{
|
|
struct usb_serial *serial = port->serial;
|
|
struct mct_u232_private *priv = usb_get_serial_port_data(port);
|
|
int retval = 0;
|
|
unsigned int control_state;
|
|
unsigned long flags;
|
|
unsigned char last_lcr;
|
|
unsigned char last_msr;
|
|
|
|
/* Compensate for a hardware bug: although the Sitecom U232-P25
|
|
* device reports a maximum output packet size of 32 bytes,
|
|
* it seems to be able to accept only 16 bytes (and that's what
|
|
* SniffUSB says too...)
|
|
*/
|
|
if (le16_to_cpu(serial->dev->descriptor.idProduct)
|
|
== MCT_U232_SITECOM_PID)
|
|
port->bulk_out_size = 16;
|
|
|
|
/* Do a defined restart: the normal serial device seems to
|
|
* always turn on DTR and RTS here, so do the same. I'm not
|
|
* sure if this is really necessary. But it should not harm
|
|
* either.
|
|
*/
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
if (tty && (tty->termios.c_cflag & CBAUD))
|
|
priv->control_state = TIOCM_DTR | TIOCM_RTS;
|
|
else
|
|
priv->control_state = 0;
|
|
|
|
priv->last_lcr = (MCT_U232_DATA_BITS_8 |
|
|
MCT_U232_PARITY_NONE |
|
|
MCT_U232_STOP_BITS_1);
|
|
control_state = priv->control_state;
|
|
last_lcr = priv->last_lcr;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
mct_u232_set_modem_ctrl(port, control_state);
|
|
mct_u232_set_line_ctrl(port, last_lcr);
|
|
|
|
/* Read modem status and update control state */
|
|
mct_u232_get_modem_stat(port, &last_msr);
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
priv->last_msr = last_msr;
|
|
mct_u232_msr_to_state(port, &priv->control_state, priv->last_msr);
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
retval = usb_submit_urb(priv->read_urb, GFP_KERNEL);
|
|
if (retval) {
|
|
dev_err(&port->dev,
|
|
"usb_submit_urb(read) failed pipe 0x%x err %d\n",
|
|
port->read_urb->pipe, retval);
|
|
goto error;
|
|
}
|
|
|
|
retval = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
|
|
if (retval) {
|
|
usb_kill_urb(priv->read_urb);
|
|
dev_err(&port->dev,
|
|
"usb_submit_urb(read int) failed pipe 0x%x err %d",
|
|
port->interrupt_in_urb->pipe, retval);
|
|
goto error;
|
|
}
|
|
return 0;
|
|
|
|
error:
|
|
return retval;
|
|
} /* mct_u232_open */
|
|
|
|
static void mct_u232_dtr_rts(struct usb_serial_port *port, int on)
|
|
{
|
|
unsigned int control_state;
|
|
struct mct_u232_private *priv = usb_get_serial_port_data(port);
|
|
|
|
spin_lock_irq(&priv->lock);
|
|
if (on)
|
|
priv->control_state |= TIOCM_DTR | TIOCM_RTS;
|
|
else
|
|
priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
|
|
control_state = priv->control_state;
|
|
spin_unlock_irq(&priv->lock);
|
|
|
|
mct_u232_set_modem_ctrl(port, control_state);
|
|
}
|
|
|
|
static void mct_u232_close(struct usb_serial_port *port)
|
|
{
|
|
struct mct_u232_private *priv = usb_get_serial_port_data(port);
|
|
|
|
usb_kill_urb(priv->read_urb);
|
|
usb_kill_urb(port->interrupt_in_urb);
|
|
|
|
usb_serial_generic_close(port);
|
|
} /* mct_u232_close */
|
|
|
|
|
|
static void mct_u232_read_int_callback(struct urb *urb)
|
|
{
|
|
struct usb_serial_port *port = urb->context;
|
|
struct mct_u232_private *priv = usb_get_serial_port_data(port);
|
|
unsigned char *data = urb->transfer_buffer;
|
|
int retval;
|
|
int status = urb->status;
|
|
unsigned long flags;
|
|
|
|
switch (status) {
|
|
case 0:
|
|
/* success */
|
|
break;
|
|
case -ECONNRESET:
|
|
case -ENOENT:
|
|
case -ESHUTDOWN:
|
|
/* this urb is terminated, clean up */
|
|
dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
|
|
__func__, status);
|
|
return;
|
|
default:
|
|
dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
|
|
__func__, status);
|
|
goto exit;
|
|
}
|
|
|
|
usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
|
|
|
|
/*
|
|
* Work-a-round: handle the 'usual' bulk-in pipe here
|
|
*/
|
|
if (urb->transfer_buffer_length > 2) {
|
|
if (urb->actual_length) {
|
|
tty_insert_flip_string(&port->port, data,
|
|
urb->actual_length);
|
|
tty_flip_buffer_push(&port->port);
|
|
}
|
|
goto exit;
|
|
}
|
|
|
|
/*
|
|
* The interrupt-in pipe signals exceptional conditions (modem line
|
|
* signal changes and errors). data[0] holds MSR, data[1] holds LSR.
|
|
*/
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
priv->last_msr = data[MCT_U232_MSR_INDEX];
|
|
|
|
/* Record Control Line states */
|
|
mct_u232_msr_to_state(port, &priv->control_state, priv->last_msr);
|
|
|
|
mct_u232_msr_to_icount(&port->icount, priv->last_msr);
|
|
|
|
#if 0
|
|
/* Not yet handled. See belkin_sa.c for further information */
|
|
/* Now to report any errors */
|
|
priv->last_lsr = data[MCT_U232_LSR_INDEX];
|
|
/*
|
|
* fill in the flip buffer here, but I do not know the relation
|
|
* to the current/next receive buffer or characters. I need
|
|
* to look in to this before committing any code.
|
|
*/
|
|
if (priv->last_lsr & MCT_U232_LSR_ERR) {
|
|
tty = tty_port_tty_get(&port->port);
|
|
/* Overrun Error */
|
|
if (priv->last_lsr & MCT_U232_LSR_OE) {
|
|
}
|
|
/* Parity Error */
|
|
if (priv->last_lsr & MCT_U232_LSR_PE) {
|
|
}
|
|
/* Framing Error */
|
|
if (priv->last_lsr & MCT_U232_LSR_FE) {
|
|
}
|
|
/* Break Indicator */
|
|
if (priv->last_lsr & MCT_U232_LSR_BI) {
|
|
}
|
|
tty_kref_put(tty);
|
|
}
|
|
#endif
|
|
wake_up_interruptible(&port->port.delta_msr_wait);
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
exit:
|
|
retval = usb_submit_urb(urb, GFP_ATOMIC);
|
|
if (retval)
|
|
dev_err(&port->dev,
|
|
"%s - usb_submit_urb failed with result %d\n",
|
|
__func__, retval);
|
|
} /* mct_u232_read_int_callback */
|
|
|
|
static void mct_u232_set_termios(struct tty_struct *tty,
|
|
struct usb_serial_port *port,
|
|
struct ktermios *old_termios)
|
|
{
|
|
struct usb_serial *serial = port->serial;
|
|
struct mct_u232_private *priv = usb_get_serial_port_data(port);
|
|
struct ktermios *termios = &tty->termios;
|
|
unsigned int cflag = termios->c_cflag;
|
|
unsigned int old_cflag = old_termios->c_cflag;
|
|
unsigned long flags;
|
|
unsigned int control_state;
|
|
unsigned char last_lcr;
|
|
|
|
/* get a local copy of the current port settings */
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
control_state = priv->control_state;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
last_lcr = 0;
|
|
|
|
/*
|
|
* Update baud rate.
|
|
* Do not attempt to cache old rates and skip settings,
|
|
* disconnects screw such tricks up completely.
|
|
* Premature optimization is the root of all evil.
|
|
*/
|
|
|
|
/* reassert DTR and RTS on transition from B0 */
|
|
if ((old_cflag & CBAUD) == B0) {
|
|
dev_dbg(&port->dev, "%s: baud was B0\n", __func__);
|
|
control_state |= TIOCM_DTR | TIOCM_RTS;
|
|
mct_u232_set_modem_ctrl(port, control_state);
|
|
}
|
|
|
|
mct_u232_set_baud_rate(tty, serial, port, tty_get_baud_rate(tty));
|
|
|
|
if ((cflag & CBAUD) == B0) {
|
|
dev_dbg(&port->dev, "%s: baud is B0\n", __func__);
|
|
/* Drop RTS and DTR */
|
|
control_state &= ~(TIOCM_DTR | TIOCM_RTS);
|
|
mct_u232_set_modem_ctrl(port, control_state);
|
|
}
|
|
|
|
/*
|
|
* Update line control register (LCR)
|
|
*/
|
|
|
|
/* set the parity */
|
|
if (cflag & PARENB)
|
|
last_lcr |= (cflag & PARODD) ?
|
|
MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN;
|
|
else
|
|
last_lcr |= MCT_U232_PARITY_NONE;
|
|
|
|
/* set the number of data bits */
|
|
switch (cflag & CSIZE) {
|
|
case CS5:
|
|
last_lcr |= MCT_U232_DATA_BITS_5; break;
|
|
case CS6:
|
|
last_lcr |= MCT_U232_DATA_BITS_6; break;
|
|
case CS7:
|
|
last_lcr |= MCT_U232_DATA_BITS_7; break;
|
|
case CS8:
|
|
last_lcr |= MCT_U232_DATA_BITS_8; break;
|
|
default:
|
|
dev_err(&port->dev,
|
|
"CSIZE was not CS5-CS8, using default of 8\n");
|
|
last_lcr |= MCT_U232_DATA_BITS_8;
|
|
break;
|
|
}
|
|
|
|
termios->c_cflag &= ~CMSPAR;
|
|
|
|
/* set the number of stop bits */
|
|
last_lcr |= (cflag & CSTOPB) ?
|
|
MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1;
|
|
|
|
mct_u232_set_line_ctrl(port, last_lcr);
|
|
|
|
/* save off the modified port settings */
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
priv->control_state = control_state;
|
|
priv->last_lcr = last_lcr;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
} /* mct_u232_set_termios */
|
|
|
|
static void mct_u232_break_ctl(struct tty_struct *tty, int break_state)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
struct mct_u232_private *priv = usb_get_serial_port_data(port);
|
|
unsigned char lcr;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
lcr = priv->last_lcr;
|
|
|
|
if (break_state)
|
|
lcr |= MCT_U232_SET_BREAK;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
mct_u232_set_line_ctrl(port, lcr);
|
|
} /* mct_u232_break_ctl */
|
|
|
|
|
|
static int mct_u232_tiocmget(struct tty_struct *tty)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
struct mct_u232_private *priv = usb_get_serial_port_data(port);
|
|
unsigned int control_state;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
control_state = priv->control_state;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
return control_state;
|
|
}
|
|
|
|
static int mct_u232_tiocmset(struct tty_struct *tty,
|
|
unsigned int set, unsigned int clear)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
struct mct_u232_private *priv = usb_get_serial_port_data(port);
|
|
unsigned int control_state;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
control_state = priv->control_state;
|
|
|
|
if (set & TIOCM_RTS)
|
|
control_state |= TIOCM_RTS;
|
|
if (set & TIOCM_DTR)
|
|
control_state |= TIOCM_DTR;
|
|
if (clear & TIOCM_RTS)
|
|
control_state &= ~TIOCM_RTS;
|
|
if (clear & TIOCM_DTR)
|
|
control_state &= ~TIOCM_DTR;
|
|
|
|
priv->control_state = control_state;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
return mct_u232_set_modem_ctrl(port, control_state);
|
|
}
|
|
|
|
static void mct_u232_throttle(struct tty_struct *tty)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
struct mct_u232_private *priv = usb_get_serial_port_data(port);
|
|
unsigned int control_state;
|
|
|
|
spin_lock_irq(&priv->lock);
|
|
priv->rx_flags |= THROTTLED;
|
|
if (C_CRTSCTS(tty)) {
|
|
priv->control_state &= ~TIOCM_RTS;
|
|
control_state = priv->control_state;
|
|
spin_unlock_irq(&priv->lock);
|
|
mct_u232_set_modem_ctrl(port, control_state);
|
|
} else {
|
|
spin_unlock_irq(&priv->lock);
|
|
}
|
|
}
|
|
|
|
static void mct_u232_unthrottle(struct tty_struct *tty)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
struct mct_u232_private *priv = usb_get_serial_port_data(port);
|
|
unsigned int control_state;
|
|
|
|
spin_lock_irq(&priv->lock);
|
|
if ((priv->rx_flags & THROTTLED) && C_CRTSCTS(tty)) {
|
|
priv->rx_flags &= ~THROTTLED;
|
|
priv->control_state |= TIOCM_RTS;
|
|
control_state = priv->control_state;
|
|
spin_unlock_irq(&priv->lock);
|
|
mct_u232_set_modem_ctrl(port, control_state);
|
|
} else {
|
|
spin_unlock_irq(&priv->lock);
|
|
}
|
|
}
|
|
|
|
module_usb_serial_driver(serial_drivers, id_table);
|
|
|
|
MODULE_AUTHOR(DRIVER_AUTHOR);
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_LICENSE("GPL");
|