Linux下安装USB转串口驱动（PL2303）

主机:Gentoo Linux 11.2

内核版本：Linux 3.0.6

原创作品，转载请标明出处http://blog.csdn.net/yming0221/article/details/7194988

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/var/lib/(内核版本)/drivers/usb/serial/目录下

然后使用命令

depmod

modprobe pl2303

然后将usb转串口接口插入usb，使用命令查看dmesg | tail查看如下

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_ID 0x067b #define PL2303_PRODUCT_ID 0x2303 #define PL2303_PRODUCT_ID_RSAQ2 0x04bb #define PL2303_PRODUCT_ID_DCU11 0x1234 #define PL2303_PRODUCT_ID_PHAROS 0xaaa0 #define PL2303_PRODUCT_ID_RSAQ3 0xaaa2 #define PL2303_PRODUCT_ID_ALDIGA 0x0611 #define PL2303_PRODUCT_ID_MMX 0x0612 #define PL2303_PRODUCT_ID_GPRS 0x0609 #define PL2303_PRODUCT_ID_HCR331 0x331a #define PL2303_PRODUCT_ID_MOTOROLA 0x0307 #define ATEN_VENDOR_ID 0x0557 #define ATEN_VENDOR_ID2 0x0547 #define ATEN_PRODUCT_ID 0x2008 #define IODATA_VENDOR_ID 0x04bb #define IODATA_PRODUCT_ID 0x0a03 #define IODATA_PRODUCT_ID_RSAQ5 0x0a0e #define ELCOM_VENDOR_ID 0x056e #define ELCOM_PRODUCT_ID 0x5003 #define ELCOM_PRODUCT_ID_UCSGT 0x5004 #define ITEGNO_VENDOR_ID 0x0eba #define ITEGNO_PRODUCT_ID 0x1080 #define ITEGNO_PRODUCT_ID_2080 0x2080 #define MA620_VENDOR_ID 0x0df7 #define MA620_PRODUCT_ID 0x0620 #define RATOC_VENDOR_ID 0x0584 #define RATOC_PRODUCT_ID 0xb000 #define TRIPP_VENDOR_ID 0x2478 #define TRIPP_PRODUCT_ID 0x2008 #define RADIOSHACK_VENDOR_ID 0x1453 #define RADIOSHACK_PRODUCT_ID 0x4026 #define DCU10_VENDOR_ID 0x0731 #define DCU10_PRODUCT_ID 0x0528 #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_ID 0x078b #define NOKIA_CA42_PRODUCT_ID 0x1234 /* CA-42 CLONE Cable www.ca-42.com chipset: Prolific Technology Inc */ #define CA_42_CA42_VENDOR_ID 0x10b5 #define CA_42_CA42_PRODUCT_ID 0xac70 #define SAGEM_VENDOR_ID 0x079b #define SAGEM_PRODUCT_ID 0x0027 /* 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_ID 0x050d #define BELKIN_PRODUCT_ID 0x0257 /* Alcor Micro Corp. USB 2.0 TO RS-232 */ #define ALCOR_VENDOR_ID 0x058F #define ALCOR_PRODUCT_ID 0x9720 /* 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_ID 0x07aa #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_ID 0x03f0 #define HP_LD220_PRODUCT_ID 0x3524 /* Cressi Edy (diving computer) PC interface */ #define CRESSI_VENDOR_ID 0x04b8 #define CRESSI_EDY_PRODUCT_ID 0x0521 /* Zeagle dive computer interface */ #define ZEAGLE_VENDOR_ID 0x04b8 #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_ID 0x0001 /* ADLINK ND-6530 RS232,RS485 and RS422 adapter */ #define ADLINK_VENDOR_ID 0x0b63 #define ADLINK_ND6530_PRODUCT_ID 0x6530 /* 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 ([email protected]) * 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 (30*HZ) 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_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 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 (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 = 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; } } /* 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