#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include "pl2303.h"
#define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver"
staticintdebug;
#define PL2303_CLOSING_WAIT (30*HZ)
staticconststructusb_device_id id_table[] = {
{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) },
{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) },
{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) },
{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) },
{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) },
{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) },
{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_HCR331) },
{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MOTOROLA) },
{ USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
{ USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) },
{ USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) },
{ USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) },
{ USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) },
{ USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) },
{ USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) },
{ USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) },
{ USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) },
{ USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) },
{ USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) },
{ USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) },
{ USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) },
{ USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) },
{ USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) },
{ USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) },
{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) },
{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) },
{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) },
{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81) },
{ USB_DEVICE(BENQ_VENDOR_ID, BENQ_PRODUCT_ID_S81) },
{ USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) },
{ USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) },
{ USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) },
{ USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) },
{ USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) },
{ USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) },
{ USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) },
{ USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) },
{ USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID) },
{ USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) },
{ USB_DEVICE(COREGA_VENDOR_ID, COREGA_PRODUCT_ID) },
{ USB_DEVICE(YCCABLE_VENDOR_ID, YCCABLE_PRODUCT_ID) },
{ USB_DEVICE(SUPERIAL_VENDOR_ID, SUPERIAL_PRODUCT_ID) },
{ USB_DEVICE(HP_VENDOR_ID, HP_LD220_PRODUCT_ID) },
{ USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) },
{ USB_DEVICE(ZEAGLE_VENDOR_ID, ZEAGLE_N2ITION3_PRODUCT_ID) },
{ USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) },
{ USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) },
{ USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) },
{ USB_DEVICE(WINCHIPHEAD_VENDOR_ID, WINCHIPHEAD_USBSER_PRODUCT_ID) },
{ }
};
MODULE_DEVICE_TABLE(usb, id_table);
staticstructusb_driver pl2303_driver = {
.name ="pl2303",
.probe = usb_serial_probe,
.disconnect = usb_serial_disconnect,
.id_table = id_table,
.suspend = usb_serial_suspend,
.resume = usb_serial_resume,
.no_dynamic_id = 1,
.supports_autosuspend = 1,
};
#define SET_LINE_REQUEST_TYPE 0x21
#define SET_LINE_REQUEST 0x20
#define SET_CONTROL_REQUEST_TYPE 0x21
#define SET_CONTROL_REQUEST 0x22
#define CONTROL_DTR 0x01
#define CONTROL_RTS 0x02
#define BREAK_REQUEST_TYPE 0x21
#define BREAK_REQUEST 0x23
#define BREAK_ON 0xffff
#define BREAK_OFF 0x0000
#define GET_LINE_REQUEST_TYPE 0xa1
#define GET_LINE_REQUEST 0x21
#define VENDOR_WRITE_REQUEST_TYPE 0x40
#define VENDOR_WRITE_REQUEST 0x01
#define VENDOR_READ_REQUEST_TYPE 0xc0
#define VENDOR_READ_REQUEST 0x01
#define UART_STATE 0x08
#define UART_STATE_TRANSIENT_MASK 0x74
#define UART_DCD 0x01
#define UART_DSR 0x02
#define UART_BREAK_ERROR 0x04
#define UART_RING 0x08
#define UART_FRAME_ERROR 0x10
#define UART_PARITY_ERROR 0x20
#define UART_OVERRUN_ERROR 0x40
#define UART_CTS 0x80
enumpl2303_type {
type_0,
type_1,
HX,
};
structpl2303_private {
spinlock_t lock;
wait_queue_head_t delta_msr_wait;
u8 line_control;
u8 line_status;
enumpl2303_type type;
};
staticintpl2303_vendor_read(__u16 value, __u16 index,
structusb_serial *serial, unsignedchar*buf)
{
intres = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE,
value, index, buf, 1, 100);
dbg("0x%x:0x%x:0x%x:0x%x %d - %x", VENDOR_READ_REQUEST_TYPE,
VENDOR_READ_REQUEST, value, index, res, buf[0]);
returnres;
}
staticintpl2303_vendor_write(__u16 value, __u16 index,
structusb_serial *serial)
{
intres = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE,
value, index, NULL, 0, 100);
dbg("0x%x:0x%x:0x%x:0x%x %d", VENDOR_WRITE_REQUEST_TYPE,
VENDOR_WRITE_REQUEST, value, index, res);
returnres;
}
staticintpl2303_startup(structusb_serial *serial)
{
structpl2303_private *priv;
enumpl2303_type type = type_0;
unsignedchar*buf;
inti;
buf = kmalloc(10, GFP_KERNEL);
if(buf == NULL)
return-ENOMEM;
if(serial->dev->descriptor.bDeviceClass == 0x02)
type = type_0;
elseif(serial->dev->descriptor.bMaxPacketSize0 == 0x40)
type = HX;
elseif(serial->dev->descriptor.bDeviceClass == 0x00)
type = type_1;
elseif(serial->dev->descriptor.bDeviceClass == 0xFF)
type = type_1;
dbg("device type: %d", type);
for(i = 0; i num_ports; ++i) {
priv = kzalloc(sizeof(structpl2303_private), GFP_KERNEL);
if(!priv)
gotocleanup;
spin_lock_init(&priv->lock);
init_waitqueue_head(&priv->delta_msr_wait);
priv->type = type;
usb_set_serial_port_data(serial->port[i], priv);
}
pl2303_vendor_read(0x8484, 0, serial, buf);
pl2303_vendor_write(0x0404, 0, serial);
pl2303_vendor_read(0x8484, 0, serial, buf);
pl2303_vendor_read(0x8383, 0, serial, buf);
pl2303_vendor_read(0x8484, 0, serial, buf);
pl2303_vendor_write(0x0404, 1, serial);
pl2303_vendor_read(0x8484, 0, serial, buf);
pl2303_vendor_read(0x8383, 0, serial, buf);
pl2303_vendor_write(0, 1, serial);
pl2303_vendor_write(1, 0, serial);
if(type == HX)
pl2303_vendor_write(2, 0x44, serial);
else
pl2303_vendor_write(2, 0x24, serial);
kfree(buf);
return0;
cleanup:
kfree(buf);
for(--i; i >= 0; --i) {
priv = usb_get_serial_port_data(serial->port[i]);
kfree(priv);
usb_set_serial_port_data(serial->port[i], NULL);
}
return-ENOMEM;
}
staticintset_control_lines(structusb_device *dev, u8 value)
{
intretval;
retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
value, 0, NULL, 0, 100);
dbg("%s - value = %d, retval = %d", __func__, value, retval);
returnretval;
}
staticvoidpl2303_set_termios(structtty_struct *tty,
structusb_serial_port *port,structktermios *old_termios)
{
structusb_serial *serial = port->serial;
structpl2303_private *priv = usb_get_serial_port_data(port);
unsignedlongflags;
unsignedintcflag;
unsignedchar*buf;
intbaud;
inti;
u8 control;
constintbaud_sup[] = { 75, 150, 300, 600, 1200, 1800, 2400, 3600,
4800, 7200, 9600, 14400, 19200, 28800, 38400,
57600, 115200, 230400, 460800, 614400,
921600, 1228800, 2457600, 3000000, 6000000 };
intbaud_floor, baud_ceil;
intk;
dbg("%s - port %d", __func__, port->number);
if(!tty_termios_hw_change(tty->termios, old_termios))
return;
cflag = tty->termios->c_cflag;
buf = kzalloc(7, GFP_KERNEL);
if(!buf) {
dev_err(&port->dev,"%s - out of memory.\n", __func__);
*tty->termios = *old_termios;
return;
}
i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
0, 0, buf, 7, 100);
dbg("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
if(cflag & CSIZE) {
switch(cflag & CSIZE) {
caseCS5:
buf[6] = 5;
break;
caseCS6:
buf[6] = 6;
break;
caseCS7:
buf[6] = 7;
break;
default:
caseCS8:
buf[6] = 8;
break;
}
dbg("%s - data bits = %d", __func__, buf[6]);
}
baud = tty_get_baud_rate(tty);
dbg("%s - baud requested = %d", __func__, baud);
if(baud) {
for(k=0; k
if(baud_sup[k] / baud) {
baud_ceil = baud_sup[k];
if(k==0) {
baud = baud_ceil;
}else{
baud_floor = baud_sup[k-1];
if((baud_ceil % baud)
> (baud % baud_floor))
baud = baud_floor;
else
baud = baud_ceil;
}
break;
}
}
if(baud > 1228800) {
if(priv->type != HX)
baud = 1228800;
elseif(baud > 6000000)
baud = 6000000;
}
dbg("%s - baud set = %d", __func__, baud);
if(baud <= 115200) {
buf[0] = baud & 0xff;
buf[1] = (baud >> 8) & 0xff;
buf[2] = (baud >> 16) & 0xff;
buf[3] = (baud >> 24) & 0xff;
}else{
unsigned tmp = 12*1000*1000*32 / baud;
buf[3] = 0x80;
buf[2] = 0;
buf[1] = (tmp >= 256);
while(tmp >= 256) {
tmp >>= 2;
buf[1] <<= 1;
}
if(tmp > 256) {
tmp %= 256;
}
buf[0] = tmp;
}
}
if(cflag & CSTOPB) {
if((cflag & CSIZE) == CS5) {
buf[4] = 1;
dbg("%s - stop bits = 1.5", __func__);
}else{
buf[4] = 2;
dbg("%s - stop bits = 2", __func__);
}
}else{
buf[4] = 0;
dbg("%s - stop bits = 1", __func__);
}
if(cflag & PARENB) {
if(cflag & PARODD) {
if(cflag & CMSPAR) {
buf[5] = 3;
dbg("%s - parity = mark", __func__);
}else{
buf[5] = 1;
dbg("%s - parity = odd", __func__);
}
}else{
if(cflag & CMSPAR) {
buf[5] = 4;
dbg("%s - parity = space", __func__);
}else{
buf[5] = 2;
dbg("%s - parity = even", __func__);
}
}
}else{
buf[5] = 0;
dbg("%s - parity = none", __func__);
}
i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
0, 0, buf, 7, 100);
dbg("0x21:0x20:0:0 %d", i);
spin_lock_irqsave(&priv->lock, flags);
control = priv->line_control;
if((cflag & CBAUD) == B0)
priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
else
priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
if(control != priv->line_control) {
control = priv->line_control;
spin_unlock_irqrestore(&priv->lock, flags);
set_control_lines(serial->dev, control);
}else{
spin_unlock_irqrestore(&priv->lock, flags);
}
buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;
i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
0, 0, buf, 7, 100);
dbg("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
if(cflag & CRTSCTS) {
if(priv->type == HX)
pl2303_vendor_write(0x0, 0x61, serial);
else
pl2303_vendor_write(0x0, 0x41, serial);
}else{
pl2303_vendor_write(0x0, 0x0, serial);
}
if(baud)
tty_encode_baud_rate(tty, baud, baud);
kfree(buf);
}
staticvoidpl2303_dtr_rts(structusb_serial_port *port,inton)
{
structpl2303_private *priv = usb_get_serial_port_data(port);
unsignedlongflags;
u8 control;
spin_lock_irqsave(&priv->lock, flags);
if(on)
priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
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);
}
staticvoidpl2303_close(structusb_serial_port *port)
{
dbg("%s - port %d", __func__, port->number);
usb_serial_generic_close(port);
usb_kill_urb(port->interrupt_in_urb);
}
staticintpl2303_open(structtty_struct *tty,structusb_serial_port *port)
{
structktermios tmp_termios;
structusb_serial *serial = port->serial;
structpl2303_private *priv = usb_get_serial_port_data(port);
intresult;
dbg("%s - port %d", __func__, port->number);
if(priv->type != HX) {
usb_clear_halt(serial->dev, port->write_urb->pipe);
usb_clear_halt(serial->dev, port->read_urb->pipe);
}else{
pl2303_vendor_write(8, 0, serial);
pl2303_vendor_write(9, 0, serial);
}
if(tty)
pl2303_set_termios(tty, port, &tmp_termios);
dbg("%s - submitting read urb", __func__);
result = usb_serial_generic_submit_read_urb(port, GFP_KERNEL);
if(result) {
pl2303_close(port);
return-EPROTO;
}
dbg("%s - submitting interrupt urb", __func__);
result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
if(result) {
dev_err(&port->dev,"%s - failed submitting interrupt urb,"
" error %d\n", __func__, result);
pl2303_close(port);
return-EPROTO;
}
port->port.drain_delay = 256;
return0;
}
staticintpl2303_tiocmset(structtty_struct *tty,
unsignedintset, unsignedintclear)
{
structusb_serial_port *port = tty->driver_data;
structpl2303_private *priv = usb_get_serial_port_data(port);
unsignedlongflags;
u8 control;
if(!usb_get_intfdata(port->serial->interface))
return-ENODEV;
spin_lock_irqsave(&priv->lock, flags);
if(set & TIOCM_RTS)
priv->line_control |= CONTROL_RTS;
if(set & TIOCM_DTR)
priv->line_control |= CONTROL_DTR;
if(clear & TIOCM_RTS)
priv->line_control &= ~CONTROL_RTS;
if(clear & TIOCM_DTR)
priv->line_control &= ~CONTROL_DTR;
control = priv->line_control;
spin_unlock_irqrestore(&priv->lock, flags);
returnset_control_lines(port->serial->dev, control);
}
staticintpl2303_tiocmget(structtty_struct *tty)
{
structusb_serial_port *port = tty->driver_data;
structpl2303_private *priv = usb_get_serial_port_data(port);
unsignedlongflags;
unsignedintmcr;
unsignedintstatus;
unsignedintresult;
dbg("%s (%d)", __func__, port->number);
if(!usb_get_intfdata(port->serial->interface))
return-ENODEV;
spin_lock_irqsave(&priv->lock, flags);
mcr = priv->line_control;
status = priv->line_status;
spin_unlock_irqrestore(&priv->lock, flags);
result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0)
| ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0)
| ((status & UART_CTS) ? TIOCM_CTS : 0)
| ((status & UART_DSR) ? TIOCM_DSR : 0)
| ((status & UART_RING) ? TIOCM_RI : 0)
| ((status & UART_DCD) ? TIOCM_CD : 0);
dbg("%s - result = %x", __func__, result);
returnresult;
}
staticintpl2303_carrier_raised(structusb_serial_port *port)
{
structpl2303_private *priv = usb_get_serial_port_data(port);
if(priv->line_status & UART_DCD)
return1;
return0;
}
staticintwait_modem_info(structusb_serial_port *port, unsignedintarg)
{
structpl2303_private *priv = usb_get_serial_port_data(port);
unsignedlongflags;
unsignedintprevstatus;
unsignedintstatus;
unsignedintchanged;
spin_lock_irqsave(&priv->lock, flags);
prevstatus = priv->line_status;
spin_unlock_irqrestore(&priv->lock, flags);
while(1) {
interruptible_sleep_on(&priv->delta_msr_wait);
if(signal_pending(current))
return-ERESTARTSYS;
spin_lock_irqsave(&priv->lock, flags);
status = priv->line_status;
spin_unlock_irqrestore(&priv->lock, flags);
changed = prevstatus ^ status;
if(((arg & TIOCM_RNG) && (changed & UART_RING)) ||
((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
((arg & TIOCM_CD) && (changed & UART_DCD)) ||
((arg & TIOCM_CTS) && (changed & UART_CTS))) {
return0;
}
prevstatus = status;
}
return0;
}
staticintpl2303_ioctl(structtty_struct *tty,
unsignedintcmd, unsignedlongarg)
{
structserial_struct ser;
structusb_serial_port *port = tty->driver_data;
dbg("%s (%d) cmd = 0x%04x", __func__, port->number, cmd);
switch(cmd) {
caseTIOCGSERIAL:
memset(&ser, 0,sizeofser);
ser.type = PORT_16654;
ser.line = port->serial->minor;
ser.port = port->number;
ser.baud_base = 460800;
if(copy_to_user((void__user *)arg, &ser,sizeofser))
return-EFAULT;
return0;
caseTIOCMIWAIT:
dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
returnwait_modem_info(port, arg);
default:
dbg("%s not supported = 0x%04x", __func__, cmd);
break;
}
return-ENOIOCTLCMD;
}
staticvoidpl2303_break_ctl(structtty_struct *tty,intbreak_state)
{
structusb_serial_port *port = tty->driver_data;
structusb_serial *serial = port->serial;
u16 state;
intresult;
dbg("%s - port %d", __func__, port->number);
if(break_state == 0)
state = BREAK_OFF;
else
state = BREAK_ON;
dbg("%s - turning break %s", __func__,
state == BREAK_OFF ?"off":"on");
result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
0, NULL, 0, 100);
if(result)
dbg("%s - error sending break = %d", __func__, result);
}
staticvoidpl2303_release(structusb_serial *serial)
{
inti;
structpl2303_private *priv;
dbg("%s", __func__);
for(i = 0; i num_ports; ++i) {
priv = usb_get_serial_port_data(serial->port[i]);
kfree(priv);
}
}
staticvoidpl2303_update_line_status(structusb_serial_port *port,
unsignedchar*data,
unsignedintactual_length)
{
structpl2303_private *priv = usb_get_serial_port_data(port);
structtty_struct *tty;
unsignedlongflags;
u8 status_idx = UART_STATE;
u8 length = UART_STATE + 1;
u8 prev_line_status;
u16 idv, idp;
idv = le16_to_cpu(port->serial->dev->descriptor.idVendor);
idp = le16_to_cpu(port->serial->dev->descriptor.idProduct);
if(idv == SIEMENS_VENDOR_ID) {
if(idp == SIEMENS_PRODUCT_ID_X65 ||
idp == SIEMENS_PRODUCT_ID_SX1 ||
idp == SIEMENS_PRODUCT_ID_X75) {
length = 1;
status_idx = 0;
}
}
if(actual_length
return;
spin_lock_irqsave(&priv->lock, flags);
prev_line_status = priv->line_status;
priv->line_status = data[status_idx];
spin_unlock_irqrestore(&priv->lock, flags);
if(priv->line_status & UART_BREAK_ERROR)
usb_serial_handle_break(port);
wake_up_interruptible(&priv->delta_msr_wait);
tty = tty_port_tty_get(&port->port);
if(!tty)
return;
if((priv->line_status ^ prev_line_status) & UART_DCD)
usb_serial_handle_dcd_change(port, tty,
priv->line_status & UART_DCD);
tty_kref_put(tty);
}
staticvoidpl2303_read_int_callback(structurb *urb)
{
structusb_serial_port *port = urb->context;
unsignedchar*data = urb->transfer_buffer;
unsignedintactual_length = urb->actual_length;
intstatus = urb->status;
intretval;
dbg("%s (%d)", __func__, port->number);
switch(status) {
case0:
break;
case-ECONNRESET:
case-ENOENT:
case-ESHUTDOWN:
dbg("%s - urb shutting down with status: %d", __func__,
status);
return;
default:
dbg("%s - nonzero urb status received: %d", __func__,
status);
gotoexit;
}
usb_serial_debug_data(debug, &port->dev, __func__,
urb->actual_length, urb->transfer_buffer);
pl2303_update_line_status(port, data, actual_length);
exit:
retval = usb_submit_urb(urb, GFP_ATOMIC);
if(retval)
dev_err(&urb->dev->dev,
"%s - usb_submit_urb failed with result %d\n",
__func__, retval);
}
staticvoidpl2303_process_read_urb(structurb *urb)
{
structusb_serial_port *port = urb->context;
structpl2303_private *priv = usb_get_serial_port_data(port);
structtty_struct *tty;
unsignedchar*data = urb->transfer_buffer;
chartty_flag = TTY_NORMAL;
unsignedlongflags;
u8 line_status;
inti;
spin_lock_irqsave(&priv->lock, flags);
line_status = priv->line_status;
priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
spin_unlock_irqrestore(&priv->lock, flags);
wake_up_interruptible(&priv->delta_msr_wait);
if(!urb->actual_length)
return;
tty = tty_port_tty_get(&port->port);
if(!tty)
return;
if(line_status & UART_BREAK_ERROR)
tty_flag = TTY_BREAK;
elseif(line_status & UART_PARITY_ERROR)
tty_flag = TTY_PARITY;
elseif(line_status & UART_FRAME_ERROR)
tty_flag = TTY_FRAME;
dbg("%s - tty_flag = %d", __func__, tty_flag);
if(line_status & UART_OVERRUN_ERROR)
tty_insert_flip_char(tty, 0, TTY_OVERRUN);
if(port->port.console && port->sysrq) {
for(i = 0; i actual_length; ++i)
if(!usb_serial_handle_sysrq_char(port, data[i]))
tty_insert_flip_char(tty, data[i], tty_flag);
}else{
tty_insert_flip_string_fixed_flag(tty, data, tty_flag,
urb->actual_length);
}
tty_flip_buffer_push(tty);
tty_kref_put(tty);
}
staticstructusb_serial_driver pl2303_device = {
.driver = {
.owner = THIS_MODULE,
.name ="pl2303",
},
.id_table = id_table,
.usb_driver = &pl2303_driver,
.num_ports = 1,
.bulk_in_size = 256,
.bulk_out_size = 256,
.open = pl2303_open,
.close = pl2303_close,
.dtr_rts = pl2303_dtr_rts,
.carrier_raised = pl2303_carrier_raised,
.ioctl = pl2303_ioctl,
.break_ctl = pl2303_break_ctl,
.set_termios = pl2303_set_termios,
.tiocmget = pl2303_tiocmget,
.tiocmset = pl2303_tiocmset,
.process_read_urb = pl2303_process_read_urb,
.read_int_callback = pl2303_read_int_callback,
.attach = pl2303_startup,
.release = pl2303_release,
};
staticint__init pl2303_init(void)
{
intretval;
retval = usb_serial_register(&pl2303_device);
if(retval)
gotofailed_usb_serial_register;
retval = usb_register(&pl2303_driver);
if(retval)
gotofailed_usb_register;
printk(KERN_INFO KBUILD_MODNAME": "DRIVER_DESC"\n");
return0;
failed_usb_register:
usb_serial_deregister(&pl2303_device);
failed_usb_serial_register:
returnretval;
}
staticvoid__exit pl2303_exit(void)
{
usb_deregister(&pl2303_driver);
usb_serial_deregister(&pl2303_device);
}
module_init(pl2303_init);
module_exit(pl2303_exit);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
module_param(debug,bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug,"Debug enabled or not");