主机:Gentoo Linux 11.2

内核版本：Linux 3.0.6

以前在Ubuntu下USB转串口驱动已经编译进内核，而编译的Gentoo内核没有编译进去，这里将内核中PL2303驱动 copy出来单独编译出pl2303.ko然后将其复制进/usr/src/linux/drivers/usb/serial/目录下

然后使用命令

modprobe usbserial

modprobe pl2303

然后将usb转串口接口插入usb，使用命令查看dmesg | tail

查看内核中驱动，看到usbserial.ko驱动，下面单独编译pl2303.ko

从内核中拷贝的pl2303.h

/

Prolific PL2303 USB to serial adaptor driver header file

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.

/

#define BENQ_VENDOR_ID  0x04a5

#define BENQ_PRODUCT_ID_S81 0x4027

#define PL2303_VENDOR_ID0x067b

#define PL2303_PRODUCT_ID   0x2303

#define PL2303_PRODUCT_ID_RSAQ2 0x04bb

#define PL2303_PRODUCT_ID_DCU11 0x1234

#define PL2303_PRODUCT_ID_PHAROS0xaaa0

#define PL2303_PRODUCT_ID_RSAQ3 0xaaa2

#define PL2303_PRODUCT_ID_ALDIGA0x0611

#define PL2303_PRODUCT_ID_MMX   0x0612

#define PL2303_PRODUCT_ID_GPRS  0x0609

#define PL2303_PRODUCT_ID_HCR3310x331a

#define PL2303_PRODUCT_ID_MOTOROLA  0x0307

#define ATEN_VENDOR_ID  0x0557

#define ATEN_VENDOR_ID2 0x0547

#define ATEN_PRODUCT_ID 0x2008

#define IODATA_VENDOR_ID0x04bb

#define IODATA_PRODUCT_ID   0x0a03

#define IODATA_PRODUCT_ID_RSAQ5 0x0a0e

#define ELCOM_VENDOR_ID 0x056e

#define ELCOM_PRODUCT_ID0x5003

#define ELCOM_PRODUCT_ID_UCSGT  0x5004

#define ITEGNO_VENDOR_ID0x0eba

#define ITEGNO_PRODUCT_ID   0x1080

#define ITEGNO_PRODUCT_ID_2080  0x2080

#define MA620_VENDOR_ID 0x0df7

#define MA620_PRODUCT_ID0x0620

#define RATOC_VENDOR_ID 0x0584

#define RATOC_PRODUCT_ID0xb000

#define TRIPP_VENDOR_ID 0x2478

#define TRIPP_PRODUCT_ID0x2008

#define RADIOSHACK_VENDOR_ID0x1453

#define RADIOSHACK_PRODUCT_ID   0x4026

#define DCU10_VENDOR_ID 0x0731

#define DCU10_PRODUCT_ID0x0528

#define SITECOM_VENDOR_ID   0x6189

#define SITECOM_PRODUCT_ID  0x2068

/ Alcatel OT535/735 USB cable /

#define ALCATEL_VENDOR_ID   0x11f7

#define ALCATEL_PRODUCT_ID  0x02df

/ Samsung I330 phone cradle /

#define SAMSUNG_VENDOR_ID   0x04e8

#define SAMSUNG_PRODUCT_ID  0x8001

#define SIEMENS_VENDOR_ID   0x11f5

#define SIEMENS_PRODUCT_ID_SX1  0x0001

#define SIEMENS_PRODUCT_ID_X65  0x0003

#define SIEMENS_PRODUCT_ID_X75  0x0004

#define SIEMENS_PRODUCT_ID_EF81 0x0005

#define SYNTECH_VENDOR_ID   0x0745

#define SYNTECH_PRODUCT_ID  0x0001

/ Nokia CA-42 Cable /

#define NOKIA_CA42_VENDOR_ID0x078b

#define NOKIA_CA42_PRODUCT_ID   0x1234

/ CA-42 CLONE Cable www.ca-42.com chipset: Prolific Technology Inc /

#define CA_42_CA42_VENDOR_ID0x10b5

#define CA_42_CA42_PRODUCT_ID   0xac70

#define SAGEM_VENDOR_ID 0x079b

#define SAGEM_PRODUCT_ID0x0027

/ Leadtek GPS 9531 (ID 0413:2101) /

#define LEADTEK_VENDOR_ID   0x0413

#define LEADTEK_9531_PRODUCT_ID 0x2101

/ USB GSM cable from Speed Dragon Multimedia, Ltd /

#define SPEEDDRAGON_VENDOR_ID   0x0e55

#define SPEEDDRAGON_PRODUCT_ID  0x110b

/ DATAPILOT Universal-2 Phone Cable /

#define DATAPILOT_U2_VENDOR_ID  0x0731

#define DATAPILOT_U2_PRODUCT_ID 0x2003

/ Belkin "F5U257" Serial Adapter /

#define BELKIN_VENDOR_ID0x050d

#define BELKIN_PRODUCT_ID   0x0257

/ Alcor Micro Corp. USB 2.0 TO RS-232 /

#define ALCOR_VENDOR_ID 0x058F

#define ALCOR_PRODUCT_ID0x9720

/ Willcom WS002IN Data Driver (by NetIndex Inc.) /

#define WS002IN_VENDOR_ID   0x11f6

#define WS002IN_PRODUCT_ID  0x2001

/ Corega CG-USBRS232R Serial Adapter /

#define COREGA_VENDOR_ID0x07aa

#define COREGA_PRODUCT_ID   0x002a

/ Y.C. Cable U.S.A., Inc - USB to RS-232 /

#define YCCABLE_VENDOR_ID   0x05ad

#define YCCABLE_PRODUCT_ID  0x0fba

/ "Superial" USB - Serial /

#define SUPERIAL_VENDOR_ID  0x5372

#define SUPERIAL_PRODUCT_ID 0x2303

/ Hewlett-Packard LD220-HP POS Pole Display /

#define HP_VENDOR_ID0x03f0

#define HP_LD220_PRODUCT_ID 0x3524

/ Cressi Edy (diving computer) PC interface /

#define CRESSI_VENDOR_ID0x04b8

#define CRESSI_EDY_PRODUCT_ID   0x0521

/ Zeagle dive computer interface /

#define ZEAGLE_VENDOR_ID0x04b8

#define ZEAGLE_N2ITION3_PRODUCT_ID  0x0522

/ Sony, USB data cable for CMD-Jxx mobile phones /

#define SONY_VENDOR_ID  0x054c

#define SONY_QN3USB_PRODUCT_ID  0x0437

/ Sanwa KB-USB2 multimeter cable (ID: 11ad:0001) /

#define SANWA_VENDOR_ID 0x11ad

#define SANWA_PRODUCT_ID0x0001

/ ADLINK ND-6530 RS232,RS485 and RS422 adapter /

#define ADLINK_VENDOR_ID0x0b63

#define ADLINK_ND6530_PRODUCT_ID0x6530

/ WinChipHead USB->RS 232 adapter /

#define WINCHIPHEAD_VENDOR_ID   0x4348

#define WINCHIPHEAD_USBSER_PRODUCT_ID   0x5523

pl2303.c代码

/

Prolific PL2303 USB to serial adaptor driver

Copyright (C) 2001-2007 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 version

2 as published by the Free Software Foundation.

See Documentation/usb/usb-serial.txt for more information on using this

driver

/

#include

#include

#include

#include

#include

#include

#include

#include

#include

#include

#include

#include

#include

#include

#include "pl2303.h"

/

Version Information

/

#define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver"

static int debug;

#define PL2303_CLOSING_WAIT (30HZ)

static const 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(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) }, / Benq/Siemens 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) },

{ } / Terminating entry /

};

MODULE_DEVICE_TABLE(usb, id_table);

static struct usb_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_REQUEST0x20

#define SET_CONTROL_REQUEST_TYPE0x21

#define SET_CONTROL_REQUEST 0x22

#define CONTROL_DTR 0x01

#define CONTROL_RTS 0x02

#define BREAK_REQUEST_TYPE  0x21

#define BREAK_REQUEST   0x23

#define BREAK_ON0xffff

#define BREAK_OFF   0x0000

#define GET_LINE_REQUEST_TYPE   0xa1

#define GET_LINE_REQUEST0x21

#define VENDOR_WRITE_REQUEST_TYPE   0x40

#define VENDOR_WRITE_REQUEST0x01

#define VENDOR_READ_REQUEST_TYPE0xc0

#define VENDOR_READ_REQUEST 0x01

#define UART_STATE  0x08

#define UART_STATE_TRANSIENT_MASK   0x74

#define UART_DCD0x01

#define UART_DSR0x02

#define UART_BREAK_ERROR0x04

#define UART_RING   0x08

#define UART_FRAME_ERROR0x10

#define UART_PARITY_ERROR   0x20

#define UART_OVERRUN_ERROR  0x40

#define UART_CTS0x80

enum pl2303_type {

type_0, / don't know the difference between type 0 and /

type_1, / type 1, until someone from prolific tells us... /

HX, / HX version of the pl2303 chip /

};

struct pl2303_private {

spinlock_t lock;

wait_queue_head_t delta_msr_wait;

u8 line_control;

u8 line_status;

enum pl2303_type type;

};

static int pl2303_vendor_read(__u16 value, __u16 index,

struct usb_serial serial, unsigned char buf)

{

int res = 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]);

return res;

}

static int pl2303_vendor_write(__u16 value, __u16 index,

struct usb_serial serial)

{

int res = 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);

return res;

}

static int pl2303_startup(struct usb_serial serial)

{

struct pl2303_private priv;

enum pl2303_type type = type_0;

unsigned char buf;

int i;

buf = kmalloc(10, GFP_KERNEL);

if (buf == NULL)

return -ENOMEM;

if (serial->dev->descriptor.bDeviceClass == 0x02)

type = type_0;

else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)

type = HX;

else if (serial->dev->descriptor.bDeviceClass == 0x00)

type = type_1;

else if (serial->dev->descriptor.bDeviceClass == 0xFF)

type = type_1;

dbg("device type: %d", type);

for (i = 0; i < serial->num_ports; ++i) {

priv = kzalloc(sizeof(struct pl2303_private), GFP_KERNEL);

if (!priv)

goto cleanup;

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);

return 0;

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;

}

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", __func__, value, retval);

return retval;

}

static void pl2303_set_termios(struct tty_struct tty,

struct usb_serial_port port, struct ktermios 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;

const int baud_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 };

int baud_floor, baud_ceil;

int k;

dbg("%s -  port %d", __func__, port->number);

/ The PL2303 is reported to lose bytes if you change

serial settings even to the same values as before. Thus

we actually need to filter in this specific case /

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__);

/ Report back no change occurred /

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) {

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", __func__, buf[6]);

}

/ For reference buf[0]:buf[3] baud rate value /

/ NOTE: Only the values defined in baud_sup are supported !

=> if unsupported values are set, the PL2303 seems to use

9600 baud (at least my PL2303X always does)

/

baud = tty_get_baud_rate(tty);

dbg("%s - baud requested = %d", __func__, baud);

if (baud) {

/ Set baudrate to nearest supported value /

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) {

/ type_0, type_1 only support up to 1228800 baud /

if (priv->type != HX)

baud = 1228800;

else if (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 {

/ apparently the formula for higher speeds is:

baudrate = 12M  32 / (2^buf[1]) / buf[0]

/

unsigned tmp = 121000100032 / 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;

}

}

/ 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) {

/ NOTE: Comply with "real" UARTs / RS232:

use 1.5 instead of 2 stop bits with 5 data bits

/

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) {

/ 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) {

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);

/ 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) {

if (priv->type == HX)

pl2303_vendor_write(0x0, 0x61, serial);

else

pl2303_vendor_write(0x0, 0x41, serial);

} else {

pl2303_vendor_write(0x0, 0x0, serial);

}

/ Save resulting baud rate /

if (baud)

tty_encode_baud_rate(tty, baud, baud);

kfree(buf);

}

static void pl2303_dtr_rts(struct usb_serial_port port, int on)

{

struct pl2303_private priv = usb_get_serial_port_data(port);

unsigned long flags;

u8 control;

spin_lock_irqsave(&priv->lock, flags);

/ Change DTR and RTS /

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);

}

static void pl2303_close(struct usb_serial_port port)

{

dbg("%s - port %d", __func__, port->number);

usb_serial_generic_close(port);

usb_kill_urb(port->interrupt_in_urb);

}

static int pl2303_open(struct tty_struct tty, struct usb_serial_port port)

{

struct ktermios tmp_termios;

struct usb_serial serial = port->serial;

struct pl2303_private priv = usb_get_serial_port_data(port);

int result;

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 {

/ reset upstream data pipes /

pl2303_vendor_write(8, 0, serial);

pl2303_vendor_write(9, 0, serial);

}

/ Setup termios /

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;

return 0;

}

static int pl2303_tiocmset(struct tty_struct tty,

unsigned int set, unsigned int clear)

{

struct usb_serial_port port = tty->driver_data;

struct pl2303_private priv = usb_get_serial_port_data(port);

unsigned long flags;

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);

return set_control_lines(port->serial->dev, control);

}

static int pl2303_tiocmget(struct tty_struct tty)

{

struct usb_serial_port port = tty->driver_data;

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)", __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);

return result;

}

static int pl2303_carrier_raised(struct usb_serial_port port)

{

struct pl2303_private priv = usb_get_serial_port_data(port);

if (priv->line_status & UART_DCD)

return 1;

return 0;

}

static int wait_modem_info(struct usb_serial_port port, unsigned int arg)

{

struct pl2303_private priv = usb_get_serial_port_data(port);

unsigned long flags;

unsigned int prevstatus;

unsigned int status;

unsigned int changed;

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);

/ see if a signal did it /

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))) {

return 0;

}

prevstatus = status;

}

/ NOTREACHED /

return 0;

}

static int pl2303_ioctl(struct tty_struct tty,

unsigned int cmd, unsigned long arg)

{

struct serial_struct ser;

struct usb_serial_port port = tty->driver_data;

dbg("%s (%d) cmd = 0x%04x", __func__, port->number, cmd);

switch (cmd) {

case TIOCGSERIAL:

memset(&ser, 0, sizeof ser);

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, sizeof ser))

return -EFAULT;

return 0;

case TIOCMIWAIT:

dbg("%s (%d) TIOCMIWAIT", __func__,  port->number);

return wait_modem_info(port, arg);

default:

dbg("%s not supported = 0x%04x", __func__, cmd);

break;

}

return -ENOIOCTLCMD;

}

static void pl2303_break_ctl(struct tty_struct tty, int break_state)

{

struct usb_serial_port port = tty->driver_data;

struct usb_serial serial = port->serial;

u16 state;

int result;

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);

}

static void pl2303_release(struct usb_serial serial)

{

int i;

struct pl2303_private priv;

dbg("%s", __func__);

for (i = 0; i < serial->num_ports; ++i) {

priv = usb_get_serial_port_data(serial->port[i]);

kfree(priv);

}

}

static void pl2303_update_line_status(struct usb_serial_port port,

unsigned char data,

unsigned int actual_length)

{

struct pl2303_private priv = usb_get_serial_port_data(port);

struct tty_struct tty;

unsigned long flags;

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 < length)

return;

/ Save off the uart status for others to look at /

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);

}

static void pl2303_read_int_callback(struct urb urb)

{

struct usb_serial_port port =  urb->context;

unsigned char data = urb->transfer_buffer;

unsigned int actual_length = urb->actual_length;

int status = urb->status;

int retval;

dbg("%s (%d)", __func__, port->number);

switch (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", __func__,

status);

return;

default:

dbg("%s - nonzero urb status received: %d", __func__,

status);

goto exit;

}

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);

}

static void pl2303_process_read_urb(struct urb urb)

{

struct usb_serial_port port = urb->context;

struct pl2303_private priv = usb_get_serial_port_data(port);

struct tty_struct tty;

unsigned char data = urb->transfer_buffer;

char tty_flag = TTY_NORMAL;

unsigned long flags;

u8 line_status;

int i;

/ update line status /

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;

/ break takes precedence over parity, /

/ which takes precedence over framing errors /

if (line_status & UART_BREAK_ERROR)

tty_flag = TTY_BREAK;

else if (line_status & UART_PARITY_ERROR)

tty_flag = TTY_PARITY;

else if (line_status & UART_FRAME_ERROR)

tty_flag = TTY_FRAME;

dbg("%s - tty_flag = %d", __func__, tty_flag);

/ overrun is special, not associated with a char /

if (line_status & UART_OVERRUN_ERROR)

tty_insert_flip_char(tty, 0, TTY_OVERRUN);

if (port->port.console && port->sysrq) {

for (i = 0; i < urb->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);

}

/ All of the device info needed for the PL2303 SIO serial converter /

static struct usb_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,

};

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;

printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");

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_param(debug, bool, S_IRUGO | S_IWUSR);

MODULE_PARM_DESC(debug, "Debug enabled or not");

Makefile文件：

#KVER = /usr/src/linux

KVER = /lib/modules/`uname -r`/build

CURDIR = $(shell pwd)

# Kernel modules

obj-m := pl2303.o

build: kernel_modules

kernel_modules:

$(MAKE) -C $(KVER) M=$(CURDIR) modules

clean:

$(MAKE) -C $(KVER) M=$(CURDIR) clean