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/* * 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 <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/moduleparam.h> #include <linux/spinlock.h> #include <asm/uaccess.h> #include <linux/usb.h> #include <linux/usb/serial.h> #include "pl2303.h" /* * Version Information */ #define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver" static int debug; #define PL2303_CLOSING_WAIT (30*HZ) #define PL2303_BUF_SIZE 1024 #define PL2303_TMP_BUF_SIZE 1024 struct pl2303_buf { unsigned int buf_size; char *buf_buf; char *buf_get; char *buf_put; }; 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(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(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(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(HL340_VENDOR_ID, HL340_PRODUCT_ID) }, { USB_DEVICE(YCCABLE_VENDOR_ID, YCCABLE_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; struct pl2303_buf *buf; int write_urb_in_use; wait_queue_head_t delta_msr_wait; u8 line_control; u8 line_status; u8 termios_initialized; enum pl2303_type type; }; /* * pl2303_buf_alloc * * Allocate a circular buffer and all associated memory. */ static struct pl2303_buf *pl2303_buf_alloc(unsigned int size) { struct pl2303_buf *pb; if (size == 0) return NULL; pb = kmalloc(sizeof(struct pl2303_buf), GFP_KERNEL); if (pb == NULL) return NULL; pb->buf_buf = kmalloc(size, GFP_KERNEL); if (pb->buf_buf == NULL) { kfree(pb); return NULL; } pb->buf_size = size; pb->buf_get = pb->buf_put = pb->buf_buf; return pb; } /* * pl2303_buf_free * * Free the buffer and all associated memory. */ static void pl2303_buf_free(struct pl2303_buf *pb) { if (pb) { kfree(pb->buf_buf); kfree(pb); } } /* * pl2303_buf_clear * * Clear out all data in the circular buffer. */ static void pl2303_buf_clear(struct pl2303_buf *pb) { if (pb != NULL) pb->buf_get = pb->buf_put; /* equivalent to a get of all data available */ } /* * pl2303_buf_data_avail * * Return the number of bytes of data available in the circular * buffer. */ static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb) { if (pb == NULL) return 0; return ((pb->buf_size + pb->buf_put - pb->buf_get) % pb->buf_size); } /* * pl2303_buf_space_avail * * Return the number of bytes of space available in the circular * buffer. */ static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb) { if (pb == NULL) return 0; return ((pb->buf_size + pb->buf_get - pb->buf_put - 1) % pb->buf_size); } /* * pl2303_buf_put * * Copy data data from a user buffer and put it into the circular buffer. * Restrict to the amount of space available. * * Return the number of bytes copied. */ static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf, unsigned int count) { unsigned int len; if (pb == NULL) return 0; len = pl2303_buf_space_avail(pb); if (count > len) count = len; if (count == 0) return 0; len = pb->buf_buf + pb->buf_size - pb->buf_put; if (count > len) { memcpy(pb->buf_put, buf, len); memcpy(pb->buf_buf, buf+len, count - len); pb->buf_put = pb->buf_buf + count - len; } else { memcpy(pb->buf_put, buf, count); if (count < len) pb->buf_put += count; else /* count == len */ pb->buf_put = pb->buf_buf; } return count; } /* * pl2303_buf_get * * Get data from the circular buffer and copy to the given buffer. * Restrict to the amount of data available. * * Return the number of bytes copied. */ static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf, unsigned int count) { unsigned int len; if (pb == NULL) return 0; len = pl2303_buf_data_avail(pb); if (count > len) count = len; if (count == 0) return 0; len = pb->buf_buf + pb->buf_size - pb->buf_get; if (count > len) { memcpy(buf, pb->buf_get, len); memcpy(buf+len, pb->buf_buf, count - len); pb->buf_get = pb->buf_buf + count - len; } else { memcpy(buf, pb->buf_get, count); if (count < len) pb->buf_get += count; else /* count == len */ pb->buf_get = pb->buf_buf; } return count; } 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); priv->buf = pl2303_buf_alloc(PL2303_BUF_SIZE); if (priv->buf == NULL) { kfree(priv); goto cleanup; } 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]); pl2303_buf_free(priv->buf); 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_send(struct usb_serial_port *port) { int count, result; struct pl2303_private *priv = usb_get_serial_port_data(port); unsigned long flags; dbg("%s - port %d", __func__, port->number); spin_lock_irqsave(&priv->lock, flags); if (priv->write_urb_in_use) { spin_unlock_irqrestore(&priv->lock, flags); return; } count = pl2303_buf_get(priv->buf, port->write_urb->transfer_buffer, port->bulk_out_size); if (count == 0) { spin_unlock_irqrestore(&priv->lock, flags); return; } priv->write_urb_in_use = 1; spin_unlock_irqrestore(&priv->lock, flags); usb_serial_debug_data(debug, &port->dev, __func__, 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", __func__, result); priv->write_urb_in_use = 0; // TODO: reschedule pl2303_send } usb_serial_port_softint(port); } static int pl2303_write(struct usb_serial_port *port, const unsigned char *buf, int count) { struct pl2303_private *priv = usb_get_serial_port_data(port); unsigned long flags; dbg("%s - port %d, %d bytes", __func__, port->number, count); if (!count) return count; spin_lock_irqsave(&priv->lock, flags); count = pl2303_buf_put(priv->buf, buf, count); spin_unlock_irqrestore(&priv->lock, flags); pl2303_send(port); return count; } static int pl2303_write_room(struct usb_serial_port *port) { struct pl2303_private *priv = usb_get_serial_port_data(port); int room = 0; unsigned long flags; dbg("%s - port %d", __func__, port->number); spin_lock_irqsave(&priv->lock, flags); room = pl2303_buf_space_avail(priv->buf); spin_unlock_irqrestore(&priv->lock, flags); dbg("%s - returns %d", __func__, room); return room; } static int pl2303_chars_in_buffer(struct usb_serial_port *port) { struct pl2303_private *priv = usb_get_serial_port_data(port); int chars = 0; unsigned long flags; dbg("%s - port %d", __func__, port->number); spin_lock_irqsave(&priv->lock, flags); chars = pl2303_buf_data_avail(priv->buf); spin_unlock_irqrestore(&priv->lock, flags); dbg("%s - returns %d", __func__, chars); return chars; } static void pl2303_set_termios(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; dbg("%s - port %d", __func__, port->number); spin_lock_irqsave(&priv->lock, flags); if (!priv->termios_initialized) { *(port->tty->termios) = tty_std_termios; port->tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; port->tty->termios->c_ispeed = 9600; port->tty->termios->c_ospeed = 9600; priv->termios_initialized = 1; } spin_unlock_irqrestore(&priv->lock, flags); /* 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(port->tty->termios, old_termios)) return; cflag = port->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 */ *port->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]); } baud = tty_get_baud_rate(port->tty);; dbg("%s - baud = %d", __func__, 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", __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) { buf[5] = 1; dbg("%s - parity = odd", __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); } /* FIXME: Need to read back resulting baud rate */ if (baud) tty_encode_baud_rate(port->tty, baud, baud); kfree(buf); } static void pl2303_close(struct usb_serial_port *port, struct file *filp) { struct pl2303_private *priv = usb_get_serial_port_data(port); unsigned long flags; unsigned int c_cflag; int bps; long timeout; wait_queue_t wait; dbg("%s - port %d", __func__, port->number); /* wait for data to drain from the buffer */ spin_lock_irqsave(&priv->lock, flags); timeout = PL2303_CLOSING_WAIT; init_waitqueue_entry(&wait, current); add_wait_queue(&port->tty->write_wait, &wait); for (;;) { set_current_state(TASK_INTERRUPTIBLE); if (pl2303_buf_data_avail(priv->buf) == 0 || timeout == 0 || signal_pending(current) || port->serial->disconnected) break; spin_unlock_irqrestore(&priv->lock, flags); timeout = schedule_timeout(timeout); spin_lock_irqsave(&priv->lock, flags); } set_current_state(TASK_RUNNING); remove_wait_queue(&port->tty->write_wait, &wait); /* clear out any remaining data in the buffer */ pl2303_buf_clear(priv->buf); spin_unlock_irqrestore(&priv->lock, flags); /* wait for characters to drain from the device */ /* (this is long enough for the entire 256 byte */ /* pl2303 hardware buffer to drain with no flow */ /* control for data rates of 1200 bps or more, */ /* for lower rates we should really know how much */ /* data is in the buffer to compute a delay */ /* that is not unnecessarily long) */ bps = tty_get_baud_rate(port->tty); if (bps > 1200) timeout = max((HZ*2560)/bps,HZ/10); else timeout = 2*HZ; schedule_timeout_interruptible(timeout); /* shutdown our urbs */ dbg("%s - shutting down urbs", __func__); usb_kill_urb(port->write_urb); usb_kill_urb(port->read_urb); usb_kill_urb(port->interrupt_in_urb); if (port->tty) { c_cflag = port->tty->termios->c_cflag; if (c_cflag & HUPCL) { /* drop DTR and RTS */ 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_open(struct usb_serial_port *port, struct file *filp) { 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 (port->tty) { pl2303_set_termios(port, &tmp_termios); } //FIXME: need to assert RTS and DTR if CRTSCTS off dbg("%s - submitting read urb", __func__); 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", __func__, result); pl2303_close(port, NULL); return -EPROTO; } dbg("%s - submitting interrupt urb", __func__); 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", __func__, result); pl2303_close(port, NULL); return -EPROTO; } return 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; 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 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)", __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 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 usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg) { dbg("%s (%d) cmd = 0x%04x", __func__, port->number, cmd); switch (cmd) { 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 usb_serial_port *port, int break_state) { 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_shutdown(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]); if (priv) { pl2303_buf_free(priv->buf); kfree(priv); usb_set_serial_port_data(serial->port[i], NULL); } } } 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); unsigned long flags; u8 status_idx = UART_STATE; u8 length = UART_STATE + 1; 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); priv->line_status = data[status_idx]; spin_unlock_irqrestore(&priv->lock, flags); wake_up_interruptible(&priv->delta_msr_wait); } 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_read_bulk_callback(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; unsigned long flags; int i; int result; int status = urb->status; u8 line_status; char tty_flag; dbg("%s - port %d", __func__, port->number); if (status) { dbg("%s - urb status = %d", __func__, status); if (!port->open_count) { dbg("%s - port is closed, exiting.", __func__); return; } if (status == -EPROTO) { /* PL2303 mysteriously fails with -EPROTO reschedule * the read */ dbg("%s - caught -EPROTO, resubmitting the urb", __func__); urb->dev = port->serial->dev; result = usb_submit_urb(urb, GFP_ATOMIC); if (result) dev_err(&urb->dev->dev, "%s - failed" " resubmitting read urb, error %d\n", __func__, result); return; } dbg("%s - unable to handle the error, exiting.", __func__); return; } usb_serial_debug_data(debug, &port->dev, __func__, urb->actual_length, data); /* get tty_flag from status */ tty_flag = TTY_NORMAL; 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); /* 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); tty = port->tty; if (tty && urb->actual_length) { tty_buffer_request_room(tty, urb->actual_length + 1); /* overrun is special, not associated with a char */ if (line_status & UART_OVERRUN_ERROR) tty_insert_flip_char(tty, 0, TTY_OVERRUN); for (i = 0; i < urb->actual_length; ++i) tty_insert_flip_char(tty, data[i], tty_flag); tty_flip_buffer_push(tty); } /* Schedule the next read _if_ we are still open */ if (port->open_count) { urb->dev = port->serial->dev; result = usb_submit_urb(urb, GFP_ATOMIC); if (result) dev_err(&urb->dev->dev, "%s - failed resubmitting" " read urb, error %d\n", __func__, result); } return; } static void pl2303_write_bulk_callback(struct urb *urb) { struct usb_serial_port *port = urb->context; struct pl2303_private *priv = usb_get_serial_port_data(port); int result; int status = urb->status; dbg("%s - port %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); priv->write_urb_in_use = 0; return; default: /* error in the urb, so we have to resubmit it */ dbg("%s - Overflow in write", __func__); dbg("%s - nonzero write bulk status received: %d", __func__, 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", __func__, result); else return; } priv->write_urb_in_use = 0; /* send any buffered data */ pl2303_send(port); } /* 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, .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, .write_room = pl2303_write_room, .chars_in_buffer = pl2303_chars_in_buffer, .attach = pl2303_startup, .shutdown = pl2303_shutdown, }; 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); 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");


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