/* * Prolific PL2303 USB to serial adaptor driver * * Copyright (C) 2001-2002 Greg Kroah-Hartman (greg@kroah.com) * * 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 * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #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 "v0.91" #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) }, { } /* Terminating entry */ }; MODULE_DEVICE_TABLE (usb, 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 /* 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); static void pl2303_read_bulk_callback (struct urb *urb); static void pl2303_write_bulk_callback (struct urb *urb); 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_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, .read_bulk_callback = pl2303_read_bulk_callback, .read_int_callback = pl2303_read_int_callback, .write_bulk_callback = pl2303_write_bulk_callback, .startup = pl2303_startup, .shutdown = pl2303_shutdown, }; struct pl2303_private { u8 line_control; u8 termios_initialized; u8 driverType; }; 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)); serial->port[i].private = 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); if (result) err("%s - failed submitting write urb, error %d", __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 = port->private; unsigned int cflag; unsigned char *buf; int baud; int i; dbg("%s - port %d, initialized = %d", __FUNCTION__, port->number, ((struct pl2303_private *) port->private)->termios_initialized); if ((!port->tty) || (!port->tty->termios)) { dbg("%s - no tty structures", __FUNCTION__); return; } if (!(((struct pl2303_private *) port->private)->termios_initialized)) { *(port->tty->termios) = tty_std_termios; port->tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; ((struct pl2303_private *) port->private)->termios_initialized = 1; } 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) { err("%s - out of memory.", __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]); /* i = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0), VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE, 0, 1, NULL, 0, 100);*/ dbg ("0x40:1:0:1 %d", i); 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 = 1228800; 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: err ("pl2303 driver does not support the baudrate requested (fix it)"); 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); if (cflag && CBAUD) { priv = port->private; if ((cflag && CBAUD) == B0) priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); else priv->line_control |= (CONTROL_DTR | CONTROL_RTS); set_control_lines (serial->dev, priv->line_control); } 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->driverType == 2) { i = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0), VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE, 0x0, 0x63, NULL, 0, 100); dbg ("0x40:0x1:0x0:0x61 %d", i); } else { 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; struct pl2303_private *priv = port->private; if (port_paranoia_check (port, __FUNCTION__)) return -ENODEV; dbg("%s - port %d", __FUNCTION__, port->number); if(serial->dev->descriptor.bDeviceClass == 0x02) priv->driverType = 0; else if(serial->dev->descriptor.bMaxPacketSize0 == 0x40) priv->driverType = 2; else if(serial->dev->descriptor.bDeviceClass == 0x00) priv->driverType = 1; else if(serial->dev->descriptor.bDeviceClass == 0xFF) priv->driverType = 1; printk("PL-2303 driver type: %d", priv->driverType); #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); if(priv->driverType == 2) { SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0, 3); } else{ SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 1, 0); } if(priv->driverType == 2) { SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x44); } else { SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x24); } /* 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); if (result) { err("%s - failed submitting read urb, error %d", __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); if (result) { err("%s - failed submitting interrupt urb, error %d", __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 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); if (serial->dev) { if (port->tty) { c_cflag = port->tty->termios->c_cflag; if (c_cflag & HUPCL) { /* drop DTR and RTS */ priv = port->private; priv->line_control = 0; set_control_lines (port->serial->dev, priv->line_control); } } /* 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); } } static int set_modem_info (struct usb_serial_port *port, unsigned int cmd, unsigned int *value) { struct pl2303_private *priv = port->private; unsigned int arg; if (copy_from_user(&arg, value, sizeof(int))) return -EFAULT; switch (cmd) { case TIOCMBIS: if (arg & TIOCM_RTS) priv->line_control |= CONTROL_RTS; if (arg & TIOCM_DTR) priv->line_control |= CONTROL_DTR; break; case TIOCMBIC: if (arg & TIOCM_RTS) priv->line_control &= ~CONTROL_RTS; if (arg & TIOCM_DTR) priv->line_control &= ~CONTROL_DTR; break; case TIOCMSET: /* turn off RTS and DTR and then only turn on what was asked to */ priv->line_control &= ~(CONTROL_RTS | CONTROL_DTR); priv->line_control |= ((arg & TIOCM_RTS) ? CONTROL_RTS : 0); priv->line_control |= ((arg & TIOCM_DTR) ? CONTROL_DTR : 0); break; } return set_control_lines (port->serial->dev, priv->line_control); } static int get_modem_info (struct usb_serial_port *port, unsigned int *value) { struct pl2303_private *priv = port->private; unsigned int mcr = priv->line_control; unsigned int result; result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0) | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0); dbg("%s - result = %x", __FUNCTION__, result); if (copy_to_user(value, &result, sizeof(int))) return -EFAULT; return 0; } 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) { case TIOCMGET: dbg("%s (%d) TIOCMGET", __FUNCTION__, port->number); return get_modem_info (port, (unsigned int *)arg); case TIOCMBIS: case TIOCMBIC: case TIOCMSET: dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __FUNCTION__, port->number); return set_modem_info(port, cmd, (unsigned int *) arg); 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_rcvctrlpipe (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 (serial->port[i].private); } static void pl2303_read_int_callback (struct urb *urb) { struct usb_serial_port *port = (struct usb_serial_port *) urb->context; struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); //unsigned char *data = urb->transfer_buffer; //int i; //ints auto restart... if (!serial) { return; } if (urb->status) { urb->status = 0; return; } usb_serial_debug_data (__FILE__, __FUNCTION__, urb->actual_length, urb->transfer_buffer); #if 0 //FIXME need to update state of terminal lines variable #endif return; } static void pl2303_read_bulk_callback (struct urb *urb) { struct usb_serial_port *port = (struct usb_serial_port *) urb->context; struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); struct tty_struct *tty; unsigned char *data = urb->transfer_buffer; int i; int result; 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); if (result) err("%s - failed resubmitting read urb, error %d", __FUNCTION__, result); return; } dbg("%s - unable to handle the error, exiting.", __FUNCTION__); return; } usb_serial_debug_data (__FILE__, __FUNCTION__, urb->actual_length, data); tty = port->tty; if (tty && urb->actual_length) { for (i = 0; i < urb->actual_length; ++i) { if (tty->flip.count >= TTY_FLIPBUF_SIZE) { tty_flip_buffer_push(tty); } tty_insert_flip_char (tty, data[i], 0); } 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); if (result) err("%s - failed resubmitting read urb, error %d", __FUNCTION__, result); } return; } static void pl2303_write_bulk_callback (struct urb *urb) { 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); if (result) err("%s - failed resubmitting write urb, error %d", __FUNCTION__, result); return; } queue_task(&port->tqueue, &tq_immediate); mark_bh(IMMEDIATE_BH); return; } static int __init pl2303_init (void) { usb_serial_register (&pl2303_device); info(DRIVER_DESC " " DRIVER_VERSION); return 0; } static void __exit pl2303_exit (void) { 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");