1,818 → 1,816 |
/* |
* Prolific PL2303 USB to serial adaptor driver |
* |
* Copyright (C) 2001-2003 Greg Kroah-Hartman (greg@kroah.com) |
* Copyright (C) 2003 IBM Corp. |
* |
* Original driver for 2.2.x by anonymous |
* |
* 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. |
* |
* See Documentation/usb/usb-serial.txt for more information on using this driver |
* |
* 2002_Mar_26 gkh |
* allowed driver to work properly if there is no tty assigned to a port |
* (this happens for serial console devices.) |
* |
* 2001_Oct_06 gkh |
* Added RTS and DTR line control. Thanks to joe@bndlg.de for parts of it. |
* |
* 2001_Sep_19 gkh |
* Added break support. |
* |
* 2001_Aug_30 gkh |
* fixed oops in write_bulk_callback. |
* |
* 2001_Aug_28 gkh |
* reworked buffer logic to be like other usb-serial drivers. Hopefully |
* removing some reported problems. |
* |
* 2001_Jun_06 gkh |
* finished porting to 2.4 format. |
* |
*/ |
|
#include <linuxcomp.h> |
|
#include <linux/config.h> |
#include <linux/kernel.h> |
#include <linux/errno.h> |
#include <linux/init.h> |
#include <linux/slab.h> |
#include <linux/tty.h> |
#include <linux/tty_driver.h> |
#include <linux/tty_flip.h> |
#include <linux/serial.h> |
#include <linux/module.h> |
#include <linux/spinlock.h> |
#include <asm/uaccess.h> |
#include <linux/usb.h> |
|
#ifdef CONFIG_USB_SERIAL_DEBUG |
static int debug = 1; |
#else |
static int debug; |
#endif |
|
#include "usb-serial.h" |
#include "pl2303.h" |
|
/* |
* Version Information |
*/ |
#define DRIVER_VERSION "v0.10" |
#define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver" |
|
|
|
static struct usb_device_id id_table [] = { |
{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) }, |
{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) }, |
{ USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) }, |
{ USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) }, |
{ USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) }, |
{ USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) }, |
{ 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) }, |
{ } /* Terminating entry */ |
}; |
|
MODULE_DEVICE_TABLE (usb, id_table); |
|
static struct usb_driver pl2303_driver = { |
.owner = THIS_MODULE, |
.name = "pl2303", |
.probe = usb_serial_probe, |
.disconnect = usb_serial_disconnect, |
.id_table = id_table, |
}; |
|
#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_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 |
|
/* function prototypes for a PL2303 serial converter */ |
static int pl2303_open (struct usb_serial_port *port, struct file *filp); |
static void pl2303_close (struct usb_serial_port *port, struct file *filp); |
static void pl2303_set_termios (struct usb_serial_port *port, |
struct termios *old); |
static int pl2303_ioctl (struct usb_serial_port *port, struct file *file, |
unsigned int cmd, unsigned long arg); |
static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs); |
static void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs); |
static void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs); |
static int pl2303_write (struct usb_serial_port *port, int from_user, |
const unsigned char *buf, int count); |
static void pl2303_break_ctl(struct usb_serial_port *port,int break_state); |
static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file); |
static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file, |
unsigned int set, unsigned int clear); |
static int pl2303_startup (struct usb_serial *serial); |
static void pl2303_shutdown (struct usb_serial *serial); |
|
|
/* All of the device info needed for the PL2303 SIO serial converter */ |
static struct usb_serial_device_type pl2303_device = { |
.owner = THIS_MODULE, |
.name = "PL-2303", |
.id_table = id_table, |
.num_interrupt_in = NUM_DONT_CARE, |
.num_bulk_in = 1, |
.num_bulk_out = 1, |
.num_ports = 1, |
.open = pl2303_open, |
.close = pl2303_close, |
.write = pl2303_write, |
.ioctl = pl2303_ioctl, |
.break_ctl = pl2303_break_ctl, |
.set_termios = pl2303_set_termios, |
.tiocmget = pl2303_tiocmget, |
.tiocmset = pl2303_tiocmset, |
.read_bulk_callback = pl2303_read_bulk_callback, |
.read_int_callback = pl2303_read_int_callback, |
.write_bulk_callback = pl2303_write_bulk_callback, |
.attach = pl2303_startup, |
.shutdown = pl2303_shutdown, |
}; |
|
struct pl2303_private { |
spinlock_t lock; |
u8 line_control; |
u8 line_status; |
u8 termios_initialized; |
}; |
|
|
static int pl2303_startup (struct usb_serial *serial) |
{ |
struct pl2303_private *priv; |
int i; |
|
for (i = 0; i < serial->num_ports; ++i) { |
priv = kmalloc (sizeof (struct pl2303_private), GFP_KERNEL); |
if (!priv) |
return -ENOMEM; |
memset (priv, 0x00, sizeof (struct pl2303_private)); |
spin_lock_init(&priv->lock); |
usb_set_serial_port_data(serial->port[i], priv); |
} |
return 0; |
} |
|
static int set_control_lines (struct usb_device *dev, u8 value) |
{ |
int retval; |
|
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", __FUNCTION__, value, retval); |
return retval; |
} |
|
static int pl2303_write (struct usb_serial_port *port, int from_user, const unsigned char *buf, int count) |
{ |
int result; |
|
dbg("%s - port %d, %d bytes", __FUNCTION__, port->number, count); |
|
if (port->write_urb->status == -EINPROGRESS) { |
dbg("%s - already writing", __FUNCTION__); |
return 0; |
} |
|
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); |
} |
|
usb_serial_debug_data (__FILE__, __FUNCTION__, count, port->write_urb->transfer_buffer); |
|
port->write_urb->transfer_buffer_length = count; |
port->write_urb->dev = port->serial->dev; |
result = usb_submit_urb (port->write_urb, GFP_ATOMIC); |
if (result) |
dev_err(&port->dev, "%s - failed submitting write urb, error %d\n", __FUNCTION__, result); |
else |
result = count; |
|
return result; |
} |
|
|
|
static void pl2303_set_termios (struct usb_serial_port *port, struct termios *old_termios) |
{ |
struct usb_serial *serial = port->serial; |
struct pl2303_private *priv = usb_get_serial_port_data(port); |
unsigned long flags; |
unsigned int cflag; |
unsigned char *buf; |
int baud; |
int i; |
u8 control; |
|
dbg("%s - port %d", __FUNCTION__, port->number); |
|
if ((!port->tty) || (!port->tty->termios)) { |
dbg("%s - no tty structures", __FUNCTION__); |
return; |
} |
|
spin_lock_irqsave(&priv->lock, flags); |
|
if (!priv->termios_initialized) { |
printk(KERN_INFO "@####### termios initializated\n"); |
*(port->tty->termios) = tty_std_termios; |
port->tty->termios->c_cflag = B38400 | CS8 | CREAD | HUPCL | CLOCAL; |
priv->termios_initialized = 1; |
} |
|
spin_unlock_irqrestore(&priv->lock, flags); |
|
cflag = port->tty->termios->c_cflag; |
/* check that they really want us to change something */ |
if (old_termios) { |
if ((cflag == old_termios->c_cflag) && |
(RELEVANT_IFLAG(port->tty->termios->c_iflag) == RELEVANT_IFLAG(old_termios->c_iflag))) { |
dbg("%s - nothing to change...", __FUNCTION__); |
return; |
} |
} |
|
buf = kmalloc (7, GFP_KERNEL); |
if (!buf) { |
dev_err(&port->dev, "%s - out of memory.\n", __FUNCTION__); |
return; |
} |
memset (buf, 0x00, 0x07); |
|
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) { |
case CS5: buf[6] = 5; break; |
case CS6: buf[6] = 6; break; |
case CS7: buf[6] = 7; break; |
default: |
case CS8: buf[6] = 8; break; |
} |
dbg("%s - data bits = %d", __FUNCTION__, buf[6]); |
} |
|
baud = 0; |
switch (cflag & CBAUD) { |
case B0: baud = 0; break; |
case B75: baud = 75; break; |
case B150: baud = 150; break; |
case B300: baud = 300; break; |
case B600: baud = 600; break; |
case B1200: baud = 1200; break; |
case B1800: baud = 1800; break; |
case B2400: baud = 2400; break; |
case B4800: baud = 4800; break; |
case B9600: baud = 9600; break; |
case B19200: baud = 19200; break; |
case B38400: baud = 38400; break; |
case B57600: baud = 57600; break; |
case B115200: baud = 115200; break; |
case B230400: baud = 230400; break; |
case B460800: baud = 460800; break; |
default: |
dev_err(&port->dev, "pl2303 driver does not support the baudrate requested (fix it)\n"); |
break; |
} |
dbg("%s - baud = %d", __FUNCTION__, baud); |
if (baud) { |
buf[0] = baud & 0xff; |
buf[1] = (baud >> 8) & 0xff; |
buf[2] = (baud >> 16) & 0xff; |
buf[3] = (baud >> 24) & 0xff; |
} |
|
/* For reference buf[4]=0 is 1 stop bits */ |
/* For reference buf[4]=1 is 1.5 stop bits */ |
/* For reference buf[4]=2 is 2 stop bits */ |
if (cflag & CSTOPB) { |
buf[4] = 2; |
dbg("%s - stop bits = 2", __FUNCTION__); |
} else { |
buf[4] = 0; |
dbg("%s - stop bits = 1", __FUNCTION__); |
} |
|
if (cflag & PARENB) { |
/* For reference buf[5]=0 is none parity */ |
/* For reference buf[5]=1 is odd parity */ |
/* For reference buf[5]=2 is even parity */ |
/* For reference buf[5]=3 is mark parity */ |
/* For reference buf[5]=4 is space parity */ |
if (cflag & PARODD) { |
buf[5] = 1; |
dbg("%s - parity = odd", __FUNCTION__); |
} else { |
buf[5] = 2; |
dbg("%s - parity = even", __FUNCTION__); |
} |
} else { |
buf[5] = 0; |
dbg("%s - parity = none", __FUNCTION__); |
} |
|
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); |
|
/* change control lines if we are switching to or from B0 */ |
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) { |
i = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0), |
VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE, |
0x0, 0x41, NULL, 0, 100); |
dbg ("0x40:0x1:0x0:0x41 %d", i); |
} |
|
kfree (buf); |
} |
|
|
static int pl2303_open (struct usb_serial_port *port, struct file *filp) |
{ |
struct termios tmp_termios; |
struct usb_serial *serial = port->serial; |
unsigned char buf[10]; |
int result; |
|
if (port_paranoia_check (port, __FUNCTION__)) |
return -ENODEV; |
|
dbg("%s - port %d", __FUNCTION__, port->number); |
|
usb_clear_halt(serial->dev, port->write_urb->pipe); |
usb_clear_halt(serial->dev, port->read_urb->pipe); |
|
#define FISH(a,b,c,d) \ |
result=usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev,0), \ |
b, a, c, d, buf, 1, 100); \ |
dbg("0x%x:0x%x:0x%x:0x%x %d - %x",a,b,c,d,result,buf[0]); |
|
#define SOUP(a,b,c,d) \ |
result=usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev,0), \ |
b, a, c, d, NULL, 0, 100); \ |
dbg("0x%x:0x%x:0x%x:0x%x %d",a,b,c,d,result); |
|
FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0); |
SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 0); |
FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0); |
FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0); |
FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0); |
SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 1); |
FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0); |
FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0); |
|
/* Setup termios */ |
if (port->tty) { |
printk(KERN_INFO "#####@ set termios"); |
pl2303_set_termios (port, &tmp_termios); |
} |
|
//FIXME: need to assert RTS and DTR if CRTSCTS off |
|
dbg("%s - submitting read urb", __FUNCTION__); |
port->read_urb->dev = serial->dev; |
result = usb_submit_urb (port->read_urb, GFP_KERNEL); |
if (result) { |
dev_err(&port->dev, "%s - failed submitting read urb, error %d\n", __FUNCTION__, result); |
pl2303_close (port, NULL); |
return -EPROTO; |
} |
|
dbg("%s - submitting interrupt urb", __FUNCTION__); |
port->interrupt_in_urb->dev = serial->dev; |
result = usb_submit_urb (port->interrupt_in_urb, GFP_KERNEL); |
if (result) { |
dev_err(&port->dev, "%s - failed submitting interrupt urb, error %d\n", __FUNCTION__, result); |
pl2303_close (port, NULL); |
return -EPROTO; |
} |
return 0; |
} |
|
|
static void pl2303_close (struct usb_serial_port *port, struct file *filp) |
{ |
struct usb_serial *serial; |
struct pl2303_private *priv; |
unsigned long flags; |
unsigned int c_cflag; |
int result; |
|
if (port_paranoia_check (port, __FUNCTION__)) |
return; |
serial = get_usb_serial (port, __FUNCTION__); |
if (!serial) |
return; |
|
dbg("%s - port %d", __FUNCTION__, port->number); |
|
/* shutdown our urbs */ |
dbg("%s - shutting down urbs", __FUNCTION__); |
result = usb_unlink_urb (port->write_urb); |
if (result) |
dbg("%s - usb_unlink_urb (write_urb)" |
" failed with reason: %d", __FUNCTION__, |
result); |
|
result = usb_unlink_urb (port->read_urb); |
if (result) |
dbg("%s - usb_unlink_urb (read_urb) " |
"failed with reason: %d", __FUNCTION__, |
result); |
|
result = usb_unlink_urb (port->interrupt_in_urb); |
if (result) |
dbg("%s - usb_unlink_urb (interrupt_in_urb)" |
" failed with reason: %d", __FUNCTION__, |
result); |
|
if (port->tty) { |
c_cflag = port->tty->termios->c_cflag; |
if (c_cflag & HUPCL) { |
/* drop DTR and RTS */ |
priv = usb_get_serial_port_data(port); |
spin_lock_irqsave(&priv->lock, flags); |
priv->line_control = 0; |
spin_unlock_irqrestore (&priv->lock, flags); |
set_control_lines (port->serial->dev, 0); |
} |
} |
|
} |
|
static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file, |
unsigned int set, unsigned int clear) |
{ |
struct pl2303_private *priv = usb_get_serial_port_data(port); |
unsigned long flags; |
u8 control; |
|
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); |
|
return set_control_lines (port->serial->dev, control); |
} |
|
static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file) |
{ |
struct pl2303_private *priv = usb_get_serial_port_data(port); |
unsigned long flags; |
unsigned int mcr; |
unsigned int status; |
unsigned int result; |
|
dbg("%s (%d)", __FUNCTION__, port->number); |
|
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", __FUNCTION__, result); |
|
return result; |
} |
|
static int pl2303_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg) |
{ |
dbg("%s (%d) cmd = 0x%04x", __FUNCTION__, port->number, cmd); |
|
switch (cmd) { |
default: |
dbg("%s not supported = 0x%04x", __FUNCTION__, cmd); |
break; |
} |
|
return -ENOIOCTLCMD; |
} |
|
static void pl2303_break_ctl (struct usb_serial_port *port, int break_state) |
{ |
struct usb_serial *serial = port->serial; |
u16 state; |
int result; |
|
dbg("%s - port %d", __FUNCTION__, port->number); |
|
if (break_state == 0) |
state = BREAK_OFF; |
else |
state = BREAK_ON; |
dbg("%s - turning break %s", state==BREAK_OFF ? "off" : "on", __FUNCTION__); |
|
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", __FUNCTION__, result); |
} |
|
|
static void pl2303_shutdown (struct usb_serial *serial) |
{ |
int i; |
|
dbg("%s", __FUNCTION__); |
|
for (i = 0; i < serial->num_ports; ++i) { |
kfree (usb_get_serial_port_data(serial->port[i])); |
usb_set_serial_port_data(serial->port[i], NULL); |
} |
} |
|
|
static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs) |
{ |
struct usb_serial_port *port = (struct usb_serial_port *) urb->context; |
struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); |
struct pl2303_private *priv = usb_get_serial_port_data(port); |
unsigned char *data = urb->transfer_buffer; |
unsigned long flags; |
int status; |
|
dbg("%s (%d)", __FUNCTION__, port->number); |
|
switch (urb->status) { |
case 0: |
/* success */ |
break; |
case -ECONNRESET: |
case -ENOENT: |
case -ESHUTDOWN: |
/* this urb is terminated, clean up */ |
dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status); |
return; |
default: |
dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status); |
goto exit; |
} |
|
if (!serial) { |
return; |
} |
|
usb_serial_debug_data (__FILE__, __FUNCTION__, urb->actual_length, urb->transfer_buffer); |
|
if (urb->actual_length < UART_STATE) |
goto exit; |
|
/* Save off the uart status for others to look at */ |
spin_lock_irqsave(&priv->lock, flags); |
priv->line_status = data[UART_STATE]; |
spin_unlock_irqrestore(&priv->lock, flags); |
|
exit: |
status = usb_submit_urb (urb, GFP_ATOMIC); |
if (status) |
dev_err(&urb->dev->dev, "%s - usb_submit_urb failed with result %d\n", |
__FUNCTION__, status); |
} |
|
|
static void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs) |
{ |
struct usb_serial_port *port = (struct usb_serial_port *) urb->context; |
struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); |
struct pl2303_private *priv = usb_get_serial_port_data(port); |
struct tty_struct *tty; |
unsigned char *data = urb->transfer_buffer; |
unsigned long flags; |
int i; |
int result; |
u8 status; |
char tty_flag; |
|
if (port_paranoia_check (port, __FUNCTION__)) |
return; |
|
dbg("%s - port %d", __FUNCTION__, port->number); |
|
if (!serial) { |
dbg("%s - bad serial pointer, exiting", __FUNCTION__); |
return; |
} |
|
|
if (urb->status) { |
dbg("%s - urb->status = %d", __FUNCTION__, urb->status); |
if (!port->open_count) { |
dbg("%s - port is closed, exiting.", __FUNCTION__); |
return; |
} |
if (urb->status == -EPROTO) { |
/* PL2303 mysteriously fails with -EPROTO reschedule the read */ |
dbg("%s - caught -EPROTO, resubmitting the urb", __FUNCTION__); |
urb->status = 0; |
urb->dev = serial->dev; |
result = usb_submit_urb(urb, GFP_ATOMIC); |
if (result) |
dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result); |
return; |
} |
dbg("%s - unable to handle the error, exiting.", __FUNCTION__); |
return; |
} |
|
usb_serial_debug_data (__FILE__, __FUNCTION__, urb->actual_length, data); |
|
/* get tty_flag from status */ |
tty_flag = TTY_NORMAL; |
|
spin_lock_irqsave(&priv->lock, flags); |
status = priv->line_status; |
spin_unlock_irqrestore(&priv->lock, flags); |
|
/* break takes precedence over parity, */ |
/* which takes precedence over framing errors */ |
if (status & UART_BREAK_ERROR ) |
tty_flag = TTY_BREAK; |
else if (status & UART_PARITY_ERROR) |
tty_flag = TTY_PARITY; |
else if (status & UART_FRAME_ERROR) |
tty_flag = TTY_FRAME; |
dbg("%s - tty_flag = %d", __FUNCTION__, tty_flag); |
|
tty = port->tty; |
if (tty && urb->actual_length) { |
/* overrun is special, not associated with a char */ |
if (status & UART_OVERRUN_ERROR) |
tty_insert_flip_char(tty, 0, TTY_OVERRUN); |
for (i = 0; i < urb->actual_length; ++i) { |
if (tty->flip.count >= TTY_FLIPBUF_SIZE) { |
tty_flip_buffer_push(tty); |
} |
//**#ifdef DEBUG_ME |
tty_insert_flip_char (tty, data[i], tty_flag); |
//**#endif /* DEBUG_ME */ |
} |
tty_flip_buffer_push (tty); |
} |
|
|
/* Schedule the next read _if_ we are still open */ |
if (port->open_count) { |
urb->dev = serial->dev; |
result = usb_submit_urb(urb, GFP_ATOMIC); |
if (result) |
dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result); |
} |
|
|
return; |
} |
|
|
|
static void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs) |
{ |
struct usb_serial_port *port = (struct usb_serial_port *) urb->context; |
int result; |
|
if (port_paranoia_check (port, __FUNCTION__)) |
return; |
|
dbg("%s - port %d", __FUNCTION__, port->number); |
|
if (urb->status) { |
/* error in the urb, so we have to resubmit it */ |
if (serial_paranoia_check (port->serial, __FUNCTION__)) { |
return; |
} |
dbg("%s - Overflow in write", __FUNCTION__); |
dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status); |
port->write_urb->transfer_buffer_length = 1; |
port->write_urb->dev = port->serial->dev; |
result = usb_submit_urb (port->write_urb, GFP_ATOMIC); |
if (result) |
dev_err(&urb->dev->dev, "%s - failed resubmitting write urb, error %d\n", __FUNCTION__, result); |
|
return; |
} |
|
schedule_work(&port->work); |
} |
|
|
/*static*/ int __init pl2303_init (void) |
{ |
int retval; |
retval = usb_serial_register(&pl2303_device); |
if (retval) |
goto failed_usb_serial_register; |
retval = usb_register(&pl2303_driver); |
if (retval) |
goto failed_usb_register; |
info(DRIVER_DESC " " DRIVER_VERSION); |
return 0; |
failed_usb_register: |
usb_serial_deregister(&pl2303_device); |
failed_usb_serial_register: |
return retval; |
} |
|
|
/*static*/ void __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_PARM(debug, "i"); |
MODULE_PARM_DESC(debug, "Debug enabled or not"); |
|
/* |
* Prolific PL2303 USB to serial adaptor driver |
* |
* Copyright (C) 2001-2003 Greg Kroah-Hartman (greg@kroah.com) |
* Copyright (C) 2003 IBM Corp. |
* |
* Original driver for 2.2.x by anonymous |
* |
* 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. |
* |
* See Documentation/usb/usb-serial.txt for more information on using this driver |
* |
* 2002_Mar_26 gkh |
* allowed driver to work properly if there is no tty assigned to a port |
* (this happens for serial console devices.) |
* |
* 2001_Oct_06 gkh |
* Added RTS and DTR line control. Thanks to joe@bndlg.de for parts of it. |
* |
* 2001_Sep_19 gkh |
* Added break support. |
* |
* 2001_Aug_30 gkh |
* fixed oops in write_bulk_callback. |
* |
* 2001_Aug_28 gkh |
* reworked buffer logic to be like other usb-serial drivers. Hopefully |
* removing some reported problems. |
* |
* 2001_Jun_06 gkh |
* finished porting to 2.4 format. |
* |
*/ |
|
#include <linuxcomp.h> |
|
#include <linux/config.h> |
#include <linux/kernel.h> |
#include <linux/errno.h> |
#include <linux/init.h> |
#include <linux/slab.h> |
#include <linux/tty.h> |
#include <linux/tty_driver.h> |
#include <linux/tty_flip.h> |
#include <linux/serial.h> |
#include <linux/module.h> |
#include <linux/spinlock.h> |
#include <asm/uaccess.h> |
#include <linux/usb.h> |
|
#ifdef CONFIG_USB_SERIAL_DEBUG |
static int debug = 1; |
#else |
static int debug; |
#endif |
|
#include "usb-serial.h" |
#include "pl2303.h" |
|
/* |
* Version Information |
*/ |
#define DRIVER_VERSION "v0.10" |
#define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver" |
|
|
|
static struct usb_device_id id_table [] = { |
{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) }, |
{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) }, |
{ USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) }, |
{ USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) }, |
{ USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) }, |
{ USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) }, |
{ 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) }, |
{ } /* Terminating entry */ |
}; |
|
MODULE_DEVICE_TABLE (usb, id_table); |
|
static struct usb_driver pl2303_driver = { |
.owner = THIS_MODULE, |
.name = "pl2303", |
.probe = usb_serial_probe, |
.disconnect = usb_serial_disconnect, |
.id_table = id_table, |
}; |
|
#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_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 |
|
/* function prototypes for a PL2303 serial converter */ |
static int pl2303_open (struct usb_serial_port *port, struct file *filp); |
static void pl2303_close (struct usb_serial_port *port, struct file *filp); |
static void pl2303_set_termios (struct usb_serial_port *port, |
struct termios *old); |
static int pl2303_ioctl (struct usb_serial_port *port, struct file *file, |
unsigned int cmd, unsigned long arg); |
static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs); |
static void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs); |
static void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs); |
static int pl2303_write (struct usb_serial_port *port, int from_user, |
const unsigned char *buf, int count); |
static void pl2303_break_ctl(struct usb_serial_port *port,int break_state); |
static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file); |
static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file, |
unsigned int set, unsigned int clear); |
static int pl2303_startup (struct usb_serial *serial); |
static void pl2303_shutdown (struct usb_serial *serial); |
|
|
/* All of the device info needed for the PL2303 SIO serial converter */ |
static struct usb_serial_device_type pl2303_device = { |
.owner = THIS_MODULE, |
.name = "PL-2303", |
.id_table = id_table, |
.num_interrupt_in = NUM_DONT_CARE, |
.num_bulk_in = 1, |
.num_bulk_out = 1, |
.num_ports = 1, |
.open = pl2303_open, |
.close = pl2303_close, |
.write = pl2303_write, |
.ioctl = pl2303_ioctl, |
.break_ctl = pl2303_break_ctl, |
.set_termios = pl2303_set_termios, |
.tiocmget = pl2303_tiocmget, |
.tiocmset = pl2303_tiocmset, |
.read_bulk_callback = pl2303_read_bulk_callback, |
.read_int_callback = pl2303_read_int_callback, |
.write_bulk_callback = pl2303_write_bulk_callback, |
.attach = pl2303_startup, |
.shutdown = pl2303_shutdown, |
}; |
|
struct pl2303_private { |
spinlock_t lock; |
u8 line_control; |
u8 line_status; |
u8 termios_initialized; |
}; |
|
|
static int pl2303_startup (struct usb_serial *serial) |
{ |
struct pl2303_private *priv; |
int i; |
|
for (i = 0; i < serial->num_ports; ++i) { |
priv = kmalloc (sizeof (struct pl2303_private), GFP_KERNEL); |
if (!priv) |
return -ENOMEM; |
memset (priv, 0x00, sizeof (struct pl2303_private)); |
spin_lock_init(&priv->lock); |
usb_set_serial_port_data(serial->port[i], priv); |
} |
return 0; |
} |
|
static int set_control_lines (struct usb_device *dev, u8 value) |
{ |
int retval; |
|
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", __FUNCTION__, value, retval); |
return retval; |
} |
|
static int pl2303_write (struct usb_serial_port *port, int from_user, const unsigned char *buf, int count) |
{ |
int result; |
|
dbg("%s - port %d, %d bytes", __FUNCTION__, port->number, count); |
|
if (port->write_urb->status == -EINPROGRESS) { |
dbg("%s - already writing", __FUNCTION__); |
return 0; |
} |
|
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); |
} |
|
usb_serial_debug_data (__FILE__, __FUNCTION__, count, port->write_urb->transfer_buffer); |
|
port->write_urb->transfer_buffer_length = count; |
port->write_urb->dev = port->serial->dev; |
result = usb_submit_urb (port->write_urb, GFP_ATOMIC); |
if (result) |
dev_err(&port->dev, "%s - failed submitting write urb, error %d\n", __FUNCTION__, result); |
else |
result = count; |
|
return result; |
} |
|
|
|
static void pl2303_set_termios (struct usb_serial_port *port, struct termios *old_termios) |
{ |
struct usb_serial *serial = port->serial; |
struct pl2303_private *priv = usb_get_serial_port_data(port); |
unsigned long flags; |
unsigned int cflag; |
unsigned char *buf; |
int baud; |
int i; |
u8 control; |
|
dbg("%s - port %d", __FUNCTION__, port->number); |
|
if ((!port->tty) || (!port->tty->termios)) { |
dbg("%s - no tty structures", __FUNCTION__); |
return; |
} |
|
spin_lock_irqsave(&priv->lock, flags); |
|
if (!priv->termios_initialized) { |
*(port->tty->termios) = tty_std_termios; |
port->tty->termios->c_cflag = B4800 | CS8 | CREAD | HUPCL | CLOCAL; |
priv->termios_initialized = 1; |
} |
|
spin_unlock_irqrestore(&priv->lock, flags); |
|
cflag = port->tty->termios->c_cflag; |
/* check that they really want us to change something */ |
if (old_termios) { |
if ((cflag == old_termios->c_cflag) && |
(RELEVANT_IFLAG(port->tty->termios->c_iflag) == RELEVANT_IFLAG(old_termios->c_iflag))) { |
dbg("%s - nothing to change...", __FUNCTION__); |
return; |
} |
} |
|
buf = kmalloc (7, GFP_KERNEL); |
if (!buf) { |
dev_err(&port->dev, "%s - out of memory.\n", __FUNCTION__); |
return; |
} |
memset (buf, 0x00, 0x07); |
|
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) { |
case CS5: buf[6] = 5; break; |
case CS6: buf[6] = 6; break; |
case CS7: buf[6] = 7; break; |
default: |
case CS8: buf[6] = 8; break; |
} |
dbg("%s - data bits = %d", __FUNCTION__, buf[6]); |
} |
|
baud = 0; |
switch (cflag & CBAUD) { |
case B0: baud = 0; break; |
case B75: baud = 75; break; |
case B150: baud = 150; break; |
case B300: baud = 300; break; |
case B600: baud = 600; break; |
case B1200: baud = 1200; break; |
case B1800: baud = 1800; break; |
case B2400: baud = 2400; break; |
case B4800: baud = 4800; break; |
case B9600: baud = 9600; break; |
case B19200: baud = 19200; break; |
case B38400: baud = 38400; break; |
case B57600: baud = 57600; break; |
case B115200: baud = 115200; break; |
case B230400: baud = 230400; break; |
case B460800: baud = 460800; break; |
default: |
dev_err(&port->dev, "pl2303 driver does not support the baudrate requested (fix it)\n"); |
break; |
} |
dbg("%s - baud = %d", __FUNCTION__, baud); |
if (baud) { |
buf[0] = baud & 0xff; |
buf[1] = (baud >> 8) & 0xff; |
buf[2] = (baud >> 16) & 0xff; |
buf[3] = (baud >> 24) & 0xff; |
} |
|
/* For reference buf[4]=0 is 1 stop bits */ |
/* For reference buf[4]=1 is 1.5 stop bits */ |
/* For reference buf[4]=2 is 2 stop bits */ |
if (cflag & CSTOPB) { |
buf[4] = 2; |
dbg("%s - stop bits = 2", __FUNCTION__); |
} else { |
buf[4] = 0; |
dbg("%s - stop bits = 1", __FUNCTION__); |
} |
|
if (cflag & PARENB) { |
/* For reference buf[5]=0 is none parity */ |
/* For reference buf[5]=1 is odd parity */ |
/* For reference buf[5]=2 is even parity */ |
/* For reference buf[5]=3 is mark parity */ |
/* For reference buf[5]=4 is space parity */ |
if (cflag & PARODD) { |
buf[5] = 1; |
dbg("%s - parity = odd", __FUNCTION__); |
} else { |
buf[5] = 2; |
dbg("%s - parity = even", __FUNCTION__); |
} |
} else { |
buf[5] = 0; |
dbg("%s - parity = none", __FUNCTION__); |
} |
|
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); |
|
/* change control lines if we are switching to or from B0 */ |
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) { |
i = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0), |
VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE, |
0x0, 0x41, NULL, 0, 100); |
dbg ("0x40:0x1:0x0:0x41 %d", i); |
} |
|
kfree (buf); |
} |
|
|
static int pl2303_open (struct usb_serial_port *port, struct file *filp) |
{ |
struct termios tmp_termios; |
struct usb_serial *serial = port->serial; |
unsigned char buf[10]; |
int result; |
|
if (port_paranoia_check (port, __FUNCTION__)) |
return -ENODEV; |
|
dbg("%s - port %d", __FUNCTION__, port->number); |
|
usb_clear_halt(serial->dev, port->write_urb->pipe); |
usb_clear_halt(serial->dev, port->read_urb->pipe); |
|
#define FISH(a,b,c,d) \ |
result=usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev,0), \ |
b, a, c, d, buf, 1, 100); \ |
dbg("0x%x:0x%x:0x%x:0x%x %d - %x",a,b,c,d,result,buf[0]); |
|
#define SOUP(a,b,c,d) \ |
result=usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev,0), \ |
b, a, c, d, NULL, 0, 100); \ |
dbg("0x%x:0x%x:0x%x:0x%x %d",a,b,c,d,result); |
|
FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0); |
SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 0); |
FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0); |
FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0); |
FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0); |
SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 1); |
FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0); |
FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0); |
|
/* Setup termios */ |
if (port->tty) { |
pl2303_set_termios (port, &tmp_termios); |
} |
|
//FIXME: need to assert RTS and DTR if CRTSCTS off |
|
dbg("%s - submitting read urb", __FUNCTION__); |
port->read_urb->dev = serial->dev; |
result = usb_submit_urb (port->read_urb, GFP_KERNEL); |
if (result) { |
dev_err(&port->dev, "%s - failed submitting read urb, error %d\n", __FUNCTION__, result); |
pl2303_close (port, NULL); |
return -EPROTO; |
} |
|
dbg("%s - submitting interrupt urb", __FUNCTION__); |
port->interrupt_in_urb->dev = serial->dev; |
result = usb_submit_urb (port->interrupt_in_urb, GFP_KERNEL); |
if (result) { |
dev_err(&port->dev, "%s - failed submitting interrupt urb, error %d\n", __FUNCTION__, result); |
pl2303_close (port, NULL); |
return -EPROTO; |
} |
return 0; |
} |
|
|
static void pl2303_close (struct usb_serial_port *port, struct file *filp) |
{ |
struct usb_serial *serial; |
struct pl2303_private *priv; |
unsigned long flags; |
unsigned int c_cflag; |
int result; |
|
if (port_paranoia_check (port, __FUNCTION__)) |
return; |
serial = get_usb_serial (port, __FUNCTION__); |
if (!serial) |
return; |
|
dbg("%s - port %d", __FUNCTION__, port->number); |
|
/* shutdown our urbs */ |
dbg("%s - shutting down urbs", __FUNCTION__); |
result = usb_unlink_urb (port->write_urb); |
if (result) |
dbg("%s - usb_unlink_urb (write_urb)" |
" failed with reason: %d", __FUNCTION__, |
result); |
|
result = usb_unlink_urb (port->read_urb); |
if (result) |
dbg("%s - usb_unlink_urb (read_urb) " |
"failed with reason: %d", __FUNCTION__, |
result); |
|
result = usb_unlink_urb (port->interrupt_in_urb); |
if (result) |
dbg("%s - usb_unlink_urb (interrupt_in_urb)" |
" failed with reason: %d", __FUNCTION__, |
result); |
|
if (port->tty) { |
c_cflag = port->tty->termios->c_cflag; |
if (c_cflag & HUPCL) { |
/* drop DTR and RTS */ |
priv = usb_get_serial_port_data(port); |
spin_lock_irqsave(&priv->lock, flags); |
priv->line_control = 0; |
spin_unlock_irqrestore (&priv->lock, flags); |
set_control_lines (port->serial->dev, 0); |
} |
} |
|
} |
|
static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file, |
unsigned int set, unsigned int clear) |
{ |
struct pl2303_private *priv = usb_get_serial_port_data(port); |
unsigned long flags; |
u8 control; |
|
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); |
|
return set_control_lines (port->serial->dev, control); |
} |
|
static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file) |
{ |
struct pl2303_private *priv = usb_get_serial_port_data(port); |
unsigned long flags; |
unsigned int mcr; |
unsigned int status; |
unsigned int result; |
|
dbg("%s (%d)", __FUNCTION__, port->number); |
|
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", __FUNCTION__, result); |
|
return result; |
} |
|
static int pl2303_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg) |
{ |
dbg("%s (%d) cmd = 0x%04x", __FUNCTION__, port->number, cmd); |
|
switch (cmd) { |
default: |
dbg("%s not supported = 0x%04x", __FUNCTION__, cmd); |
break; |
} |
|
return -ENOIOCTLCMD; |
} |
|
static void pl2303_break_ctl (struct usb_serial_port *port, int break_state) |
{ |
struct usb_serial *serial = port->serial; |
u16 state; |
int result; |
|
dbg("%s - port %d", __FUNCTION__, port->number); |
|
if (break_state == 0) |
state = BREAK_OFF; |
else |
state = BREAK_ON; |
dbg("%s - turning break %s", state==BREAK_OFF ? "off" : "on", __FUNCTION__); |
|
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", __FUNCTION__, result); |
} |
|
|
static void pl2303_shutdown (struct usb_serial *serial) |
{ |
int i; |
|
dbg("%s", __FUNCTION__); |
|
for (i = 0; i < serial->num_ports; ++i) { |
kfree (usb_get_serial_port_data(serial->port[i])); |
usb_set_serial_port_data(serial->port[i], NULL); |
} |
} |
|
|
static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs) |
{ |
struct usb_serial_port *port = (struct usb_serial_port *) urb->context; |
struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); |
struct pl2303_private *priv = usb_get_serial_port_data(port); |
unsigned char *data = urb->transfer_buffer; |
unsigned long flags; |
int status; |
|
dbg("%s (%d)", __FUNCTION__, port->number); |
|
switch (urb->status) { |
case 0: |
/* success */ |
break; |
case -ECONNRESET: |
case -ENOENT: |
case -ESHUTDOWN: |
/* this urb is terminated, clean up */ |
dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status); |
return; |
default: |
dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status); |
goto exit; |
} |
|
if (!serial) { |
return; |
} |
|
usb_serial_debug_data (__FILE__, __FUNCTION__, urb->actual_length, urb->transfer_buffer); |
|
if (urb->actual_length < UART_STATE) |
goto exit; |
|
/* Save off the uart status for others to look at */ |
spin_lock_irqsave(&priv->lock, flags); |
priv->line_status = data[UART_STATE]; |
spin_unlock_irqrestore(&priv->lock, flags); |
|
exit: |
status = usb_submit_urb (urb, GFP_ATOMIC); |
if (status) |
dev_err(&urb->dev->dev, "%s - usb_submit_urb failed with result %d\n", |
__FUNCTION__, status); |
} |
|
|
static void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs) |
{ |
struct usb_serial_port *port = (struct usb_serial_port *) urb->context; |
struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); |
struct pl2303_private *priv = usb_get_serial_port_data(port); |
struct tty_struct *tty; |
unsigned char *data = urb->transfer_buffer; |
unsigned long flags; |
int i; |
int result; |
u8 status; |
char tty_flag; |
|
if (port_paranoia_check (port, __FUNCTION__)) |
return; |
|
dbg("%s - port %d", __FUNCTION__, port->number); |
|
if (!serial) { |
dbg("%s - bad serial pointer, exiting", __FUNCTION__); |
return; |
} |
|
|
if (urb->status) { |
dbg("%s - urb->status = %d", __FUNCTION__, urb->status); |
if (!port->open_count) { |
dbg("%s - port is closed, exiting.", __FUNCTION__); |
return; |
} |
if (urb->status == -EPROTO) { |
/* PL2303 mysteriously fails with -EPROTO reschedule the read */ |
dbg("%s - caught -EPROTO, resubmitting the urb", __FUNCTION__); |
urb->status = 0; |
urb->dev = serial->dev; |
result = usb_submit_urb(urb, GFP_ATOMIC); |
if (result) |
dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result); |
return; |
} |
dbg("%s - unable to handle the error, exiting.", __FUNCTION__); |
return; |
} |
|
usb_serial_debug_data (__FILE__, __FUNCTION__, urb->actual_length, data); |
|
/* get tty_flag from status */ |
tty_flag = TTY_NORMAL; |
|
spin_lock_irqsave(&priv->lock, flags); |
status = priv->line_status; |
spin_unlock_irqrestore(&priv->lock, flags); |
|
/* break takes precedence over parity, */ |
/* which takes precedence over framing errors */ |
if (status & UART_BREAK_ERROR ) |
tty_flag = TTY_BREAK; |
else if (status & UART_PARITY_ERROR) |
tty_flag = TTY_PARITY; |
else if (status & UART_FRAME_ERROR) |
tty_flag = TTY_FRAME; |
dbg("%s - tty_flag = %d", __FUNCTION__, tty_flag); |
|
tty = port->tty; |
if (tty && urb->actual_length) { |
/* overrun is special, not associated with a char */ |
if (status & UART_OVERRUN_ERROR) |
tty_insert_flip_char(tty, 0, TTY_OVERRUN); |
for (i = 0; i < urb->actual_length; ++i) { |
if (tty->flip.count >= TTY_FLIPBUF_SIZE) { |
tty_flip_buffer_push(tty); |
} |
//**#ifdef DEBUG_ME |
tty_insert_flip_char (tty, data[i], tty_flag); |
//**#endif /* DEBUG_ME */ |
} |
tty_flip_buffer_push (tty); |
} |
|
|
/* Schedule the next read _if_ we are still open */ |
if (port->open_count) { |
urb->dev = serial->dev; |
result = usb_submit_urb(urb, GFP_ATOMIC); |
if (result) |
dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result); |
} |
|
|
return; |
} |
|
|
|
static void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs) |
{ |
struct usb_serial_port *port = (struct usb_serial_port *) urb->context; |
int result; |
|
if (port_paranoia_check (port, __FUNCTION__)) |
return; |
|
dbg("%s - port %d", __FUNCTION__, port->number); |
|
if (urb->status) { |
/* error in the urb, so we have to resubmit it */ |
if (serial_paranoia_check (port->serial, __FUNCTION__)) { |
return; |
} |
dbg("%s - Overflow in write", __FUNCTION__); |
dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status); |
port->write_urb->transfer_buffer_length = 1; |
port->write_urb->dev = port->serial->dev; |
result = usb_submit_urb (port->write_urb, GFP_ATOMIC); |
if (result) |
dev_err(&urb->dev->dev, "%s - failed resubmitting write urb, error %d\n", __FUNCTION__, result); |
|
return; |
} |
|
schedule_work(&port->work); |
} |
|
|
/*static*/ int __init pl2303_init (void) |
{ |
int retval; |
retval = usb_serial_register(&pl2303_device); |
if (retval) |
goto failed_usb_serial_register; |
retval = usb_register(&pl2303_driver); |
if (retval) |
goto failed_usb_register; |
info(DRIVER_DESC " " DRIVER_VERSION); |
return 0; |
failed_usb_register: |
usb_serial_deregister(&pl2303_device); |
failed_usb_serial_register: |
return retval; |
} |
|
|
/*static*/ void __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_PARM(debug, "i"); |
MODULE_PARM_DESC(debug, "Debug enabled or not"); |
|