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Subject[PATCH 03/11] serqt: initial clean up pass for tty side
Date
Avoid using port->tty where possible (makes refcount fixing easier later)
Remove unused code (the ioctl path is not used if the device has mget/mset
functions)
Remove various un-needed typecasts and long names so it could read it to do the
changes

Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
---
drivers/staging/serqt_usb/serqt_usb.c | 449 ++++++++++++---------------------
1 files changed, 163 insertions(+), 286 deletions(-)

diff --git a/drivers/staging/serqt_usb/serqt_usb.c b/drivers/staging/serqt_usb/serqt_usb.c
index 1781510..234f332 100644
--- a/drivers/staging/serqt_usb/serqt_usb.c
+++ b/drivers/staging/serqt_usb/serqt_usb.c
@@ -289,7 +289,8 @@ static void serial_unthrottle(struct tty_struct *tty);
static int serial_break(struct tty_struct *tty, int break_state);
static int serial_chars_in_buffer(struct tty_struct *tty);

-static int qt_open(struct usb_serial_port *port, struct file *filp);
+static int qt_open(struct tty_struct *tty, struct usb_serial_port *port,
+ struct file *filp);
static int BoxSetPrebufferLevel(struct usb_serial *serial);

static int BoxSetATC(struct usb_serial *serial, __u16 n_Mode);
@@ -300,24 +301,26 @@ static int BoxSetUart(struct usb_serial *serial, unsigned short Uart_Number,
static int BoxOPenCloseChannel(struct usb_serial *serial, __u16 Uart_Number,
__u16 OpenClose,
struct qt_open_channel_data *pDeviceData);
-static void qt_close(struct usb_serial_port *port, struct file *filp);
+static void qt_close(struct tty_struct *tty, struct usb_serial_port *port,
+ struct file *filp);
static int BoxGetRegister(struct usb_serial *serial, unsigned short Uart_Number,
unsigned short Register_Num, __u8 *pValue);
static int BoxSetRegister(struct usb_serial *serial, unsigned short Uart_Number,
unsigned short Register_Num, unsigned short Value);
static void qt_write_bulk_callback(struct urb *urb);
-static int qt_write(struct usb_serial_port *port, int from_user,
+static int qt_write(struct tty_struct *tty, struct usb_serial_port *port,
const unsigned char *buf, int count);
static void port_softint(struct work_struct *work);
static int qt_write_room(struct usb_serial_port *port);
static int qt_chars_in_buffer(struct usb_serial_port *port);
-static int qt_ioctl(struct usb_serial_port *port, struct file *file,
- unsigned int cmd, unsigned long arg);
-static void qt_set_termios(struct usb_serial_port *port,
+static int qt_ioctl(struct tty_struct *tty, struct usb_serial_port *port,
+ struct file *file, unsigned int cmd, unsigned long arg);
+static void qt_set_termios(struct tty_struct *tty,
+ struct usb_serial_port *port,
struct ktermios *old_termios);
-static int BoxSetHW_FlowCtrl(struct usb_serial *serial, unsigned int UartNumber,
+static int BoxSetHW_FlowCtrl(struct usb_serial *serial, unsigned int index,
int bSet);
-static int BoxDisable_SW_FlowCtrl(struct usb_serial *serial, __u16 UartNumber);
+static int BoxDisable_SW_FlowCtrl(struct usb_serial *serial, __u16 index);
static int EmulateWriteQMCR_Reg(int index, unsigned uc_value);
static int EmulateReadQMCR_Reg(int index, unsigned *uc_value);
static struct usb_serial *find_the_box(unsigned int index);
@@ -336,10 +339,11 @@ static int serial_tiocmset(struct tty_struct *tty, struct file *file,
unsigned int set, unsigned int clear);
static int serial_tiocmget(struct tty_struct *tty, struct file *file);

-static int qt_tiocmset(struct usb_serial_port *port, struct file *file,
- unsigned int value);
+static int qt_tiocmset(struct tty_struct *tty, struct usb_serial_port *port,
+ struct file *file, unsigned int value);

-static int qt_tiocmget(struct usb_serial_port *port, struct file *file);
+static int qt_tiocmget(struct tty_struct *tty, struct usb_serial_port *port,
+ struct file *file);

/* Version Information */
#define DRIVER_VERSION "v2.14"
@@ -818,7 +822,7 @@ static struct usb_serial *get_free_serial(int num_ports, int *minor)
return NULL;
}

-static int flip_that(struct tty_struct *tty, __u16 UartNumber,
+static int flip_that(struct tty_struct *tty, __u16 index,
struct usb_serial *serial)
{
tty_flip_buffer_push(tty);
@@ -829,18 +833,18 @@ static int flip_that(struct tty_struct *tty, __u16 UartNumber,
/* Handles processing and moving data to the tty layer */
static void port_sofrint(void *private)
{
- struct usb_serial_port *port = (struct usb_serial_port *)private;
+ struct usb_serial_port *port = private;
struct usb_serial *serial = get_usb_serial(port, __func__);
struct tty_struct *tty = port->tty;
unsigned char *data = port->read_urb->transfer_buffer;
- unsigned int UartNumber;
+ unsigned int index;
struct urb *urb = port->read_urb;
unsigned int RxCount = urb->actual_length;
int i, result;
int flag, flag_data;

- /* UartNumber = MINOR(port->tty->device) - serial->minor; */
- UartNumber = tty->index - serial->minor;
+ /* index = MINOR(port->tty->device) - serial->minor; */
+ index = tty->index - serial->minor;

mydbg("%s - port %d\n", __func__, port->number);
mydbg("%s - port->RxHolding = %d\n", __func__, port->RxHolding);
@@ -948,7 +952,7 @@ static void port_sofrint(void *private)
__func__, result);
else {
if (tty && RxCount)
- flip_that(tty, UartNumber, serial);
+ flip_that(tty, index, serial);
}

return;
@@ -1097,7 +1101,7 @@ static int serial_open(struct tty_struct *tty, struct file *filp)
port->RxHolding = 0;
mydbg("%s port->RxHolding = 0\n", __func__);

- retval = qt_open(port, filp);
+ retval = qt_open(tty, port, filp);
}

if (retval)
@@ -1112,11 +1116,12 @@ static int serial_open(struct tty_struct *tty, struct file *filp)
/*****************************************************************************
*device's specific driver functions
*****************************************************************************/
-static int qt_open(struct usb_serial_port *port, struct file *filp)
+static int qt_open(struct tty_struct *tty, struct usb_serial_port *port,
+ struct file *filp)
{
struct usb_serial *serial = port->serial;
int result = 0;
- unsigned int UartNumber;
+ unsigned int index;
struct qt_get_device_data DeviceData;
struct qt_open_channel_data ChannelData;
unsigned short default_divisor = 0x30; /* gives 9600 baud rate */
@@ -1128,13 +1133,7 @@ static int qt_open(struct usb_serial_port *port, struct file *filp)

mydbg("%s - port %d\n", __func__, port->number);

- /* force low_latency on so that our tty_push actually forces the data through,
- otherwise it is scheduled, and with high data rates (like with OHCI) data
- can get lost. */
- if (port->tty)
- port->tty->low_latency = 0;
-
- UartNumber = port->tty->index - serial->minor;
+ index = tty->index - serial->minor;

status = box_get_device(serial, &DeviceData);
if (status < 0) {
@@ -1147,7 +1146,7 @@ static int qt_open(struct usb_serial_port *port, struct file *filp)
/* Open uart channel */

/* Port specific setups */
- status = BoxOPenCloseChannel(serial, UartNumber, 1, &ChannelData);
+ status = BoxOPenCloseChannel(serial, index, 1, &ChannelData);
if (status < 0) {
mydbg(__FILE__ "BoxOPenCloseChannel failed\n");
return status;
@@ -1161,7 +1160,7 @@ static int qt_open(struct usb_serial_port *port, struct file *filp)
(SERIAL_MSR_CTS | SERIAL_MSR_DSR | SERIAL_MSR_RI | SERIAL_MSR_CD);

/* Set Baud rate to default and turn off (default)flow control here */
- status = BoxSetUart(serial, UartNumber, default_divisor, default_LCR);
+ status = BoxSetUart(serial, index, default_divisor, default_LCR);
if (status < 0) {
mydbg(__FILE__ "BoxSetUart failed\n");
return status;
@@ -1169,7 +1168,7 @@ static int qt_open(struct usb_serial_port *port, struct file *filp)
mydbg(__FILE__ "BoxSetUart completed.\n");

/* Put this here to make it responsive to stty and defauls set by the tty layer */
- qt_set_termios(port, NULL);
+ qt_set_termios(tty, port, NULL);

/* Initialize the wait que head */
init_waitqueue_head(&(port->wait));
@@ -1203,7 +1202,7 @@ static int qt_open(struct usb_serial_port *port, struct file *filp)
static void serial_close(struct tty_struct *tty, struct file *filp)
{
struct usb_serial_port *port =
- (struct usb_serial_port *)tty->driver_data;
+ tty->driver_data;
struct usb_serial *serial = get_usb_serial(port, __func__);

if (!serial)
@@ -1226,7 +1225,7 @@ static void serial_close(struct tty_struct *tty, struct file *filp)
mydbg("%s - port->closePending = 1\n", __func__);

if (serial->dev) {
- qt_close(port, filp);
+ qt_close(tty, port, filp);
port->open_count = 0;
}
}
@@ -1240,20 +1239,21 @@ exit:

}

-static void qt_close(struct usb_serial_port *port, struct file *filp)
+static void qt_close(struct tty_struct *tty, struct usb_serial_port *port,
+ struct file *filp)
{
unsigned long jift = jiffies + 10 * HZ;
- __u8 LSR_Value, MCR_Value;
+ u8 lsr, mcr;
struct usb_serial *serial = port->serial;
int status;
- unsigned int UartNumber;
+ unsigned int index;

struct qt_open_channel_data ChannelData;
status = 0;
- LSR_Value = 0;
+ lsr = 0;

mydbg("%s - port %d\n", __func__, port->number);
- UartNumber = port->tty->index - serial->minor;
+ index = tty->index - serial->minor;

/* shutdown any bulk reads that might be going on */
if (serial->num_bulk_out)
@@ -1263,20 +1263,19 @@ static void qt_close(struct usb_serial_port *port, struct file *filp)

/* wait up to 30 seconds for transmitter to empty */
do {
- status = BoxGetRegister(serial, UartNumber, LINE_STATUS_REGISTER, &LSR_Value);
+ status = BoxGetRegister(serial, index, LINE_STATUS_REGISTER, &lsr);
if (status < 0) {
mydbg(__FILE__ "box_get_device failed\n");
break;
}

- if ((LSR_Value & SERIAL_LSR_TEMT)
+ if ((lsr & SERIAL_LSR_TEMT)
&& (port->ReadBulkStopped == 1))
break;
schedule();

}
- while (jiffies <= jift)
- ;
+ while (jiffies <= jift);

if (jiffies > jift)
mydbg("%s - port %d timout of checking transmitter empty\n",
@@ -1286,17 +1285,17 @@ static void qt_close(struct usb_serial_port *port, struct file *filp)
__func__, port->number);

status =
- BoxGetRegister(serial, UartNumber, MODEM_CONTROL_REGISTER,
- &MCR_Value);
- mydbg(__FILE__ "BoxGetRegister MCR = 0x%x.\n", MCR_Value);
+ BoxGetRegister(serial, index, MODEM_CONTROL_REGISTER,
+ &mcr);
+ mydbg(__FILE__ "BoxGetRegister MCR = 0x%x.\n", mcr);

if (status >= 0) {
- MCR_Value &= ~(SERIAL_MCR_DTR | SERIAL_MCR_RTS);
- /* status = BoxSetRegister(serial, UartNumber, MODEM_CONTROL_REGISTER, MCR_Value); */
+ mcr &= ~(SERIAL_MCR_DTR | SERIAL_MCR_RTS);
+ /* status = BoxSetRegister(serial, index, MODEM_CONTROL_REGISTER, mcr); */
}

/* Close uart channel */
- status = BoxOPenCloseChannel(serial, UartNumber, 0, &ChannelData);
+ status = BoxOPenCloseChannel(serial, index, 0, &ChannelData);
if (status < 0)
mydbg("%s - port %d BoxOPenCloseChannel failed.\n",
__func__, port->number);
@@ -1308,12 +1307,10 @@ static void qt_close(struct usb_serial_port *port, struct file *filp)
static int serial_write(struct tty_struct *tty, const unsigned char *buf,
int count)
{
- struct usb_serial_port *port =
- (struct usb_serial_port *)tty->driver_data;
+ struct usb_serial_port *port = tty->driver_data;
struct usb_serial *serial;
int retval = -EINVAL;
- unsigned int UartNumber;
- int from_user = 0;
+ unsigned int index;

serial = get_usb_serial(port, __func__);
if (serial == NULL)
@@ -1321,7 +1318,7 @@ static int serial_write(struct tty_struct *tty, const unsigned char *buf,
/* This can happen if we get disconnected a */
if (port->open_count == 0)
return -ENODEV;
- UartNumber = port->tty->index - serial->minor;
+ index = tty->index - serial->minor;

mydbg("%s - port %d, %d byte(s)\n", __func__, port->number, count);
mydbg("%s - port->RxHolding = %d\n", __func__, port->RxHolding);
@@ -1331,19 +1328,19 @@ static int serial_write(struct tty_struct *tty, const unsigned char *buf,
goto exit;
}

- retval = qt_write(port, from_user, buf, count);
+ retval = qt_write(tty, port, buf, count);

exit:
return retval;
}

-static int qt_write(struct usb_serial_port *port, int from_user,
- const unsigned char *buf, int count)
+static int qt_write(struct tty_struct *tty, struct usb_serial_port *port,
+ const unsigned char *buf, int count)
{
int result;
- unsigned int UartNumber;
-
+ unsigned int index;
struct usb_serial *serial = get_usb_serial(port, __func__);
+
if (serial == NULL)
return -ENODEV;

@@ -1354,7 +1351,7 @@ static int qt_write(struct usb_serial_port *port, int from_user,
return 0;
}

- UartNumber = port->tty->index - serial->minor;
+ index = tty->index - serial->minor;
/* only do something if we have a bulk out endpoint */
if (serial->num_bulk_out) {
if (port->write_urb->status == -EINPROGRESS) {
@@ -1364,14 +1361,7 @@ static int qt_write(struct usb_serial_port *port, int from_user,

count =
(count > port->bulk_out_size) ? port->bulk_out_size : count;
-
- if (from_user) {
- if (copy_from_user
- (port->write_urb->transfer_buffer, buf, count))
- return -EFAULT;
- } else {
- memcpy(port->write_urb->transfer_buffer, buf, count);
- }
+ memcpy(port->write_urb->transfer_buffer, buf, count);

/* usb_serial_debug_data(__FILE__, __func__, count, port->write_urb->transfer_buffer); */

@@ -1449,8 +1439,7 @@ static void port_softint(struct work_struct *work)
}
static int serial_write_room(struct tty_struct *tty)
{
- struct usb_serial_port *port =
- (struct usb_serial_port *)tty->driver_data;
+ struct usb_serial_port *port = tty->driver_data;
struct usb_serial *serial = get_usb_serial(port, __func__);
int retval = -EINVAL;

@@ -1493,8 +1482,7 @@ static int qt_write_room(struct usb_serial_port *port)
}
static int serial_chars_in_buffer(struct tty_struct *tty)
{
- struct usb_serial_port *port =
- (struct usb_serial_port *)tty->driver_data;
+ struct usb_serial_port *port = tty->driver_data;
struct usb_serial *serial = get_usb_serial(port, __func__);
int retval = -EINVAL;

@@ -1537,17 +1525,16 @@ static int serial_tiocmset(struct tty_struct *tty, struct file *file,
unsigned int set, unsigned int clear)
{

- struct usb_serial_port *port =
- (struct usb_serial_port *)tty->driver_data;
+ struct usb_serial_port *port = tty->driver_data;
struct usb_serial *serial = get_usb_serial(port, __func__);
int retval = -ENODEV;
- unsigned int UartNumber;
+ unsigned int index;
mydbg("In %s \n", __func__);

if (!serial)
return -ENODEV;

- UartNumber = port->tty->index - serial->minor;
+ index = tty->index - serial->minor;

down(&port->sem);

@@ -1559,22 +1546,22 @@ static int serial_tiocmset(struct tty_struct *tty, struct file *file,
goto exit;
}

- retval = qt_tiocmset(port, file, set);
+ retval = qt_tiocmset(tty, port, file, set);

exit:
up(&port->sem);
return retval;
}

-static int qt_tiocmset(struct usb_serial_port *port, struct file *file,
- unsigned int value)
+static int qt_tiocmset(struct tty_struct *tty, struct usb_serial_port *port,
+ struct file *file, unsigned int value)
{

- __u8 MCR_Value;
+ u8 mcr;
int status;
- unsigned int UartNumber;
-
+ unsigned int index;
struct usb_serial *serial = get_usb_serial(port, __func__);
+
if (serial == NULL)
return -ENODEV;

@@ -1583,10 +1570,10 @@ static int qt_tiocmset(struct usb_serial_port *port, struct file *file,
/**************************************************************************************/
/** TIOCMGET
*/
- UartNumber = port->tty->index - serial->minor;
+ index = tty->index - serial->minor;
status =
- BoxGetRegister(port->serial, UartNumber, MODEM_CONTROL_REGISTER,
- &MCR_Value);
+ BoxGetRegister(port->serial, index, MODEM_CONTROL_REGISTER,
+ &mcr);
if (status < 0)
return -ESPIPE;

@@ -1594,17 +1581,17 @@ static int qt_tiocmset(struct usb_serial_port *port, struct file *file,
* Turn off the RTS and DTR and loopbcck and then only turn on what was
* asked for
*/
- MCR_Value &= ~(SERIAL_MCR_RTS | SERIAL_MCR_DTR | SERIAL_MCR_LOOP);
+ mcr &= ~(SERIAL_MCR_RTS | SERIAL_MCR_DTR | SERIAL_MCR_LOOP);
if (value & TIOCM_RTS)
- MCR_Value |= SERIAL_MCR_RTS;
+ mcr |= SERIAL_MCR_RTS;
if (value & TIOCM_DTR)
- MCR_Value |= SERIAL_MCR_DTR;
+ mcr |= SERIAL_MCR_DTR;
if (value & TIOCM_LOOP)
- MCR_Value |= SERIAL_MCR_LOOP;
+ mcr |= SERIAL_MCR_LOOP;

status =
- BoxSetRegister(port->serial, UartNumber, MODEM_CONTROL_REGISTER,
- MCR_Value);
+ BoxSetRegister(port->serial, index, MODEM_CONTROL_REGISTER,
+ mcr);
if (status < 0)
return -ESPIPE;
else
@@ -1614,18 +1601,16 @@ static int qt_tiocmset(struct usb_serial_port *port, struct file *file,
static int serial_tiocmget(struct tty_struct *tty, struct file *file)
{

- struct usb_serial_port *port =
- (struct usb_serial_port *)tty->driver_data;
-
+ struct usb_serial_port *port = tty->driver_data;
struct usb_serial *serial = get_usb_serial(port, __func__);
int retval = -ENODEV;
- unsigned int UartNumber;
+ unsigned int index;
mydbg("In %s \n", __func__);

if (!serial)
return -ENODEV;

- UartNumber = port->tty->index - serial->minor;
+ index = tty->index - serial->minor;

down(&port->sem);

@@ -1637,56 +1622,55 @@ static int serial_tiocmget(struct tty_struct *tty, struct file *file)
goto exit;
}

- retval = qt_tiocmget(port, file);
+ retval = qt_tiocmget(tty, port, file);

exit:
up(&port->sem);
return retval;
}

-static int qt_tiocmget(struct usb_serial_port *port, struct file *file)
+static int qt_tiocmget(struct tty_struct *tty,
+ struct usb_serial_port *port, struct file *file)
{

- __u8 MCR_Value;
- __u8 MSR_Value;
+ u8 mcr;
+ u8 msr;
unsigned int result = 0;
int status;
- unsigned int UartNumber;
- struct tty_struct *tty;
+ unsigned int index;

struct usb_serial *serial = get_usb_serial(port, __func__);
if (serial == NULL)
return -ENODEV;
- tty = port->tty;

mydbg("%s - port %d, tty =0x%p\n", __func__, port->number, tty);

/**************************************************************************************/
/** TIOCMGET
*/
- UartNumber = port->tty->index - serial->minor;
+ index = tty->index - serial->minor;
status =
- BoxGetRegister(port->serial, UartNumber, MODEM_CONTROL_REGISTER,
- &MCR_Value);
+ BoxGetRegister(port->serial, index, MODEM_CONTROL_REGISTER,
+ &mcr);
if (status >= 0) {
status =
- BoxGetRegister(port->serial, UartNumber,
- MODEM_STATUS_REGISTER, &MSR_Value);
+ BoxGetRegister(port->serial, index,
+ MODEM_STATUS_REGISTER, &msr);

}

if (status >= 0) {
- result = ((MCR_Value & SERIAL_MCR_DTR) ? TIOCM_DTR : 0)
+ result = ((mcr & SERIAL_MCR_DTR) ? TIOCM_DTR : 0)
/* DTR IS SET */
- | ((MCR_Value & SERIAL_MCR_RTS) ? TIOCM_RTS : 0)
+ | ((mcr & SERIAL_MCR_RTS) ? TIOCM_RTS : 0)
/* RTS IS SET */
- | ((MSR_Value & SERIAL_MSR_CTS) ? TIOCM_CTS : 0)
+ | ((msr & SERIAL_MSR_CTS) ? TIOCM_CTS : 0)
/* CTS is set */
- | ((MSR_Value & SERIAL_MSR_CD) ? TIOCM_CAR : 0)
+ | ((msr & SERIAL_MSR_CD) ? TIOCM_CAR : 0)
/* Carrier detect is set */
- | ((MSR_Value & SERIAL_MSR_RI) ? TIOCM_RI : 0)
+ | ((msr & SERIAL_MSR_RI) ? TIOCM_RI : 0)
/* Ring indicator set */
- | ((MSR_Value & SERIAL_MSR_DSR) ? TIOCM_DSR : 0);
+ | ((msr & SERIAL_MSR_DSR) ? TIOCM_DSR : 0);
/* DSR is set */
return result;

@@ -1698,17 +1682,16 @@ static int serial_ioctl(struct tty_struct *tty, struct file *file,
unsigned int cmd, unsigned long arg)
{

- struct usb_serial_port *port =
- (struct usb_serial_port *)tty->driver_data;
+ struct usb_serial_port *port = tty->driver_data;
struct usb_serial *serial = get_usb_serial(port, __func__);
int retval = -ENODEV;
- unsigned int UartNumber;
+ unsigned int index;
mydbg("In %s \n", __func__);

if (!serial)
return -ENODEV;

- UartNumber = port->tty->index - serial->minor;
+ index = tty->index - serial->minor;

down(&port->sem);

@@ -1720,125 +1703,34 @@ static int serial_ioctl(struct tty_struct *tty, struct file *file,
goto exit;
}

- retval = qt_ioctl(port, file, cmd, arg);
+ retval = qt_ioctl(tty, port, file, cmd, arg);

exit:
up(&port->sem);
return retval;
}
-static int qt_ioctl(struct usb_serial_port *port, struct file *file,
- unsigned int cmd, unsigned long arg)
+static int qt_ioctl(struct tty_struct *tty, struct usb_serial_port *port,
+ struct file *file, unsigned int cmd, unsigned long arg)
{
- __u8 MCR_Value;
- __u8 MSR_Value;
- unsigned short Prev_MSR_Value;
+ __u8 mcr;
+ __u8 msr;
+ unsigned short prev_msr;
unsigned int value, result = 0;
int status;
- unsigned int UartNumber;
- struct tty_struct *tty;
+ unsigned int index;

struct usb_serial *serial = get_usb_serial(port, __func__);
if (serial == NULL)
return -ENODEV;
- tty = port->tty;

mydbg("%s - port %d, tty =0x%p\n", __func__, port->number, tty);

/* TIOCMGET */
- UartNumber = port->tty->index - serial->minor;
-
- if (cmd == TIOCMGET) {
- MCR_Value = port->shadowMCR;
- MSR_Value = port->shadowMSR;
-
- {
- result = ((MCR_Value & SERIAL_MCR_DTR) ? TIOCM_DTR : 0)
- /* DTR IS SET */
- | ((MCR_Value & SERIAL_MCR_RTS) ? TIOCM_RTS : 0)
- /* RTS IS SET */
- | ((MSR_Value & SERIAL_MSR_CTS) ? TIOCM_CTS : 0)
- /* CTS is set */
- | ((MSR_Value & SERIAL_MSR_CD) ? TIOCM_CAR : 0)
- /* Carrier detect is set */
- | ((MSR_Value & SERIAL_MSR_RI) ? TIOCM_RI : 0)
- /* Ring indicator set */
- | ((MSR_Value & SERIAL_MSR_DSR) ? TIOCM_DSR : 0);
- /* DSR is set */
- if (copy_to_user
- ((unsigned int *)arg, &result,
- sizeof(unsigned int)))
- return -EFAULT;
- return 0;
-
- }
- }
-
- /* TIOCMBIS, TIOCMBIC, AND TIOCMSET */
- if (cmd == TIOCMBIS || cmd == TIOCMBIC || cmd == TIOCMSET) {
- status =
- BoxGetRegister(port->serial, UartNumber,
- MODEM_CONTROL_REGISTER, &MCR_Value);
- if (status < 0)
- return -ESPIPE;
- if (copy_from_user
- (&value, (unsigned int *)arg, sizeof(unsigned int)))
- return -EFAULT;
-
- switch (cmd) {
- case TIOCMBIS:
- if (value & TIOCM_RTS)
- MCR_Value |= SERIAL_MCR_RTS;
- if (value & TIOCM_DTR)
- MCR_Value |= SERIAL_MCR_DTR;
- if (value & TIOCM_LOOP)
- MCR_Value |= SERIAL_MCR_LOOP;
- break;
- case TIOCMBIC:
- if (value & TIOCM_RTS)
- MCR_Value &= ~SERIAL_MCR_RTS;
- if (value & TIOCM_DTR)
- MCR_Value &= ~SERIAL_MCR_DTR;
- if (value & TIOCM_LOOP)
- MCR_Value &= ~SERIAL_MCR_LOOP;
- break;
- case TIOCMSET:
- /*
- * Turn off the RTS and DTR and loopbcck and then only
- * turn on what was asked for
- */
- MCR_Value &=
- ~(SERIAL_MCR_RTS | SERIAL_MCR_DTR |
- SERIAL_MCR_LOOP);
- if (value & TIOCM_RTS)
- MCR_Value |= SERIAL_MCR_RTS;
- if (value & TIOCM_DTR)
- MCR_Value |= SERIAL_MCR_DTR;
- if (value & TIOCM_LOOP)
- MCR_Value |= SERIAL_MCR_LOOP;
- break;
- default:
- break;
-
- }
- status =
- BoxSetRegister(port->serial, UartNumber,
- MODEM_CONTROL_REGISTER, MCR_Value);
- if (status < 0)
- return -ESPIPE;
- else {
- port->shadowMCR = MCR_Value;
- return 0;
- }
-
- }
- /**************************************************************************************/
- /** TIOCMBIS, TIOCMBIC, AND TIOCMSET end
- */
- /**************************************************************************************/
+ index = tty->index - serial->minor;

if (cmd == TIOCMIWAIT) {
DECLARE_WAITQUEUE(wait, current);
- Prev_MSR_Value = port->shadowMSR & SERIAL_MSR_MASK;
+ prev_msr = port->shadowMSR & SERIAL_MSR_MASK;
while (1) {
add_wait_queue(&port->wait, &wait);
set_current_state(TASK_INTERRUPTIBLE);
@@ -1847,22 +1739,22 @@ static int qt_ioctl(struct usb_serial_port *port, struct file *file,
/* see if a signal woke us up */
if (signal_pending(current))
return -ERESTARTSYS;
- MSR_Value = port->shadowMSR & SERIAL_MSR_MASK;
- if (MSR_Value == Prev_MSR_Value)
+ msr = port->shadowMSR & SERIAL_MSR_MASK;
+ if (msr == prev_msr)
return -EIO; /* no change error */

if ((arg & TIOCM_RNG
- && ((Prev_MSR_Value & SERIAL_MSR_RI) ==
- (MSR_Value & SERIAL_MSR_RI)))
+ && ((prev_msr & SERIAL_MSR_RI) ==
+ (msr & SERIAL_MSR_RI)))
|| (arg & TIOCM_DSR
- && ((Prev_MSR_Value & SERIAL_MSR_DSR) ==
- (MSR_Value & SERIAL_MSR_DSR)))
+ && ((prev_msr & SERIAL_MSR_DSR) ==
+ (msr & SERIAL_MSR_DSR)))
|| (arg & TIOCM_CD
- && ((Prev_MSR_Value & SERIAL_MSR_CD) ==
- (MSR_Value & SERIAL_MSR_CD)))
+ && ((prev_msr & SERIAL_MSR_CD) ==
+ (msr & SERIAL_MSR_CD)))
|| (arg & TIOCM_CTS
- && ((Prev_MSR_Value & SERIAL_MSR_CTS) ==
- (MSR_Value & SERIAL_MSR_CTS)))) {
+ && ((prev_msr & SERIAL_MSR_CTS) ==
+ (msr & SERIAL_MSR_CTS)))) {
return 0;
}

@@ -1878,7 +1770,7 @@ static int qt_ioctl(struct usb_serial_port *port, struct file *file,
static void serial_set_termios(struct tty_struct *tty, struct ktermios *old)
{
struct usb_serial_port *port =
- (struct usb_serial_port *)tty->driver_data;
+ tty->driver_data;
struct usb_serial *serial = get_usb_serial(port, __func__);

if (!serial)
@@ -1894,22 +1786,22 @@ static void serial_set_termios(struct tty_struct *tty, struct ktermios *old)
}

/* pass on to the driver specific version of this function if it is available */
- qt_set_termios(port, old);
+ qt_set_termios(tty, port, old);

exit:
up(&port->sem);
}

-static void qt_set_termios(struct usb_serial_port *port,
+static void qt_set_termios(struct tty_struct *tty,
+ struct usb_serial_port *port,
struct ktermios *old_termios)
{
unsigned int cflag;
int baud, divisor, remainder;
- unsigned char LCR_change_to = 0;
- struct tty_struct *tty;
+ unsigned char new_LCR = 0;
int status;
struct usb_serial *serial;
- __u16 UartNumber;
+ __u16 index;
__u16 tmp, tmp2;

mydbg("%s - port %d\n", __func__, port->number);
@@ -1921,59 +1813,46 @@ static void qt_set_termios(struct usb_serial_port *port,
tmp2 = serial->minor;
mydbg("%s - serial->minor = %d\n", __func__, tmp2);

- UartNumber = port->tty->index - serial->minor;
-
- tty = port->tty;
+ index = port->tty->index - serial->minor;

cflag = tty->termios->c_cflag;

- if (old_termios) {
- if ((cflag == old_termios->c_cflag)
- && (RELEVANT_IFLAG(tty->termios->c_iflag) ==
- RELEVANT_IFLAG(old_termios->c_iflag))) {
- mydbg("%s - Nothing to change\n", __func__);
- return;
- }
-
- }
-
mydbg("%s - 3\n", __func__);

switch (cflag) {
case CS5:
- LCR_change_to |= SERIAL_5_DATA;
+ new_LCR |= SERIAL_5_DATA;
break;
case CS6:
- LCR_change_to |= SERIAL_6_DATA;
+ new_LCR |= SERIAL_6_DATA;
break;
case CS7:
- LCR_change_to |= SERIAL_7_DATA;
+ new_LCR |= SERIAL_7_DATA;
break;
default:
case CS8:
- LCR_change_to |= SERIAL_8_DATA;
+ new_LCR |= SERIAL_8_DATA;
break;
}

/* Parity stuff */
if (cflag & PARENB) {
if (cflag & PARODD)
- LCR_change_to |= SERIAL_ODD_PARITY;
+ new_LCR |= SERIAL_ODD_PARITY;
else
- LCR_change_to |= SERIAL_EVEN_PARITY;
+ new_LCR |= SERIAL_EVEN_PARITY;
}
if (cflag & CSTOPB)
- LCR_change_to |= SERIAL_TWO_STOPB;
+ new_LCR |= SERIAL_TWO_STOPB;
else
- LCR_change_to |= SERIAL_TWO_STOPB;
+ new_LCR |= SERIAL_TWO_STOPB;

mydbg("%s - 4\n", __func__);
/* Thats the LCR stuff, go ahead and set it */
baud = tty_get_baud_rate(tty);
- if (!baud) {
+ if (!baud)
/* pick a default, any default... */
baud = 9600;
- }

mydbg("%s - got baud = %d\n", __func__, baud);

@@ -1986,9 +1865,7 @@ static void qt_set_termios(struct usb_serial_port *port,
/*
* Set Baud rate to default and turn off (default)flow control here
*/
- status =
- BoxSetUart(serial, UartNumber, (unsigned short)divisor,
- LCR_change_to);
+ status = BoxSetUart(serial, index, (unsigned short)divisor, new_LCR);
if (status < 0) {
mydbg(__FILE__ "BoxSetUart failed\n");
return;
@@ -2000,7 +1877,7 @@ static void qt_set_termios(struct usb_serial_port *port,
port->number);

/* Enable RTS/CTS flow control */
- status = BoxSetHW_FlowCtrl(serial, UartNumber, 1);
+ status = BoxSetHW_FlowCtrl(serial, index, 1);

if (status < 0) {
mydbg(__FILE__ "BoxSetHW_FlowCtrl failed\n");
@@ -2011,7 +1888,7 @@ static void qt_set_termios(struct usb_serial_port *port,
mydbg("%s - disabling HW flow control port %d\n", __func__,
port->number);

- status = BoxSetHW_FlowCtrl(serial, UartNumber, 0);
+ status = BoxSetHW_FlowCtrl(serial, index, 0);
if (status < 0) {
mydbg(__FILE__ "BoxSetHW_FlowCtrl failed\n");
return;
@@ -2025,19 +1902,20 @@ static void qt_set_termios(struct usb_serial_port *port,
unsigned char stop_char = STOP_CHAR(tty);
unsigned char start_char = START_CHAR(tty);
status =
- BoxSetSW_FlowCtrl(serial, UartNumber, stop_char,
+ BoxSetSW_FlowCtrl(serial, index, stop_char,
start_char);
if (status < 0)
mydbg(__FILE__ "BoxSetSW_FlowCtrl (enabled) failed\n");

} else {
/* disable SW flow control */
- status = BoxDisable_SW_FlowCtrl(serial, UartNumber);
+ status = BoxDisable_SW_FlowCtrl(serial, index);
if (status < 0)
mydbg(__FILE__ "BoxSetSW_FlowCtrl (diabling) failed\n");

}
-
+ tty->termios->c_cflag &= ~CMSPAR;
+ /* FIXME: Error cases should be returning the actual bits changed only */
}

/****************************************************************************
@@ -2237,11 +2115,11 @@ static int BoxSetUart(struct usb_serial *serial, unsigned short Uart_Number,
return result;
}

-static int BoxSetHW_FlowCtrl(struct usb_serial *serial, unsigned int UartNumber,
+static int BoxSetHW_FlowCtrl(struct usb_serial *serial, unsigned int index,
int bSet)
{
- __u8 MCR_Value = 0;
- __u8 MSR_Value = 0, MOUT_Value = 0;
+ __u8 mcr = 0;
+ __u8 msr = 0, MOUT_Value = 0;
struct usb_serial_port *port;
unsigned int status;

@@ -2249,34 +2127,34 @@ static int BoxSetHW_FlowCtrl(struct usb_serial *serial, unsigned int UartNumber,

if (bSet == 1) {
/* flow control, box will clear RTS line to prevent remote */
- MCR_Value = SERIAL_MCR_RTS;
+ mcr = SERIAL_MCR_RTS;
} /* device from xmitting more chars */
else {
/* no flow control to remote device */
- MCR_Value = 0;
+ mcr = 0;

}
- MOUT_Value = MCR_Value << 8;
+ MOUT_Value = mcr << 8;

if (bSet == 1) {
/* flow control, box will inhibit xmit data if CTS line is
* asserted */
- MSR_Value = SERIAL_MSR_CTS;
+ msr = SERIAL_MSR_CTS;
} else {
/* Box will not inhimbe xmit data due to CTS line */
- MSR_Value = 0;
+ msr = 0;
}
- MOUT_Value |= MSR_Value;
+ MOUT_Value |= msr;

status =
usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
QT_HW_FLOW_CONTROL_MASK, 0x40, MOUT_Value,
- UartNumber, NULL, 0, 300);
+ index, NULL, 0, 300);
return status;

}

-static int BoxSetSW_FlowCtrl(struct usb_serial *serial, __u16 UartNumber,
+static int BoxSetSW_FlowCtrl(struct usb_serial *serial, __u16 index,
unsigned char stop_char, unsigned char start_char)
{
__u16 nSWflowout;
@@ -2288,17 +2166,17 @@ static int BoxSetSW_FlowCtrl(struct usb_serial *serial, __u16 UartNumber,
result =
usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
QT_SW_FLOW_CONTROL_MASK, 0x40, nSWflowout,
- UartNumber, NULL, 0, 300);
+ index, NULL, 0, 300);
return result;

}
-static int BoxDisable_SW_FlowCtrl(struct usb_serial *serial, __u16 UartNumber)
+static int BoxDisable_SW_FlowCtrl(struct usb_serial *serial, __u16 index)
{
int result;

result =
usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
- QT_SW_FLOW_CONTROL_DISABLE, 0x40, 0, UartNumber,
+ QT_SW_FLOW_CONTROL_DISABLE, 0x40, 0, index,
NULL, 0, 300);
return result;

@@ -2307,7 +2185,7 @@ static int BoxDisable_SW_FlowCtrl(struct usb_serial *serial, __u16 UartNumber)
static void serial_throttle(struct tty_struct *tty)
{
struct usb_serial_port *port =
- (struct usb_serial_port *)tty->driver_data;
+ tty->driver_data;
struct usb_serial *serial = get_usb_serial(port, __func__);
mydbg("%s - port %d\n", __func__, port->number);

@@ -2334,7 +2212,7 @@ exit:
static void serial_unthrottle(struct tty_struct *tty)
{
struct usb_serial_port *port =
- (struct usb_serial_port *)tty->driver_data;
+ tty->driver_data;
struct usb_serial *serial = get_usb_serial(port, __func__);
unsigned int result;

@@ -2380,20 +2258,19 @@ exit:

static int serial_break(struct tty_struct *tty, int break_state)
{
- struct usb_serial_port *port =
- (struct usb_serial_port *)tty->driver_data;
+ struct usb_serial_port *port = tty->driver_data;
struct usb_serial *serial = get_usb_serial(port, __func__);
- __u16 UartNumber, Break_Value;
+ u16 index, onoff;
unsigned int result;

- UartNumber = port->tty->index - serial->minor;
+ index = tty->index - serial->minor;
if (!serial)
return -ENODEV;

if (break_state == -1)
- Break_Value = 1;
+ onoff = 1;
else
- Break_Value = 0;
+ onoff = 0;

down(&port->sem);

@@ -2406,7 +2283,7 @@ static int serial_break(struct tty_struct *tty, int break_state)

result =
usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
- QT_BREAK_CONTROL, 0x40, Break_Value, UartNumber,
+ QT_BREAK_CONTROL, 0x40, onoff, index,
NULL, 0, 300);

exit:


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