/* * KLSI KL5KUSB105 chip RS232 converter driver * * Copyright (C) 2001 Utz-Uwe Haus * * 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. * * All information about the device was acquired using SniffUSB ans snoopUSB * on Windows98. * It was written out of frustration with the PalmConnect USB Serial adapter * sold by Palm Inc. * Neither Palm, nor their contractor (MCCI) or their supplier (KLSI) provided * information that was not already available. * * It seems that KLSI bought some silicon-design information from ScanLogic, * whose SL11R processor is at the core of the KL5KUSB chipset from KLSI. * KLSI has firmware available for their devices; it is probable that the * firmware differs from that used by KLSI in their products. If you have an * original KLSI device and can provide some information on it, I would be * most interested in adding support for it here. If you have any information * on the protocol used (or find errors in my reverse-engineered stuff), please * let me know. * * The code was only tested with a PalmConnect USB adapter; if you * are adventurous, try it with any KLSI-based device and let me know how it * breaks so that I can fix it! */ /* TODO: * check modem line signals * implement handshaking or decide that we do not support it */ /* History: * 0.3a - implemented pools of write URBs * 0.3 - alpha version for public testing * 0.2 - TIOCMGET works, so autopilot(1) can be used! * 0.1 - can be used to do pilot-xfer -p /dev/ttyUSB0 -l * * The driver skeleton is mainly based on mct_u232.c and various other * pieces of code shamelessly copied from the drivers/usb/serial/ directory. */ #include #include #include #include #include #include #include #include #include #include #include #include #include "kl5kusb105.h" static int debug; /* * Version Information */ #define DRIVER_VERSION "v0.3a" #define DRIVER_AUTHOR "Utz-Uwe Haus " #define DRIVER_DESC "KLSI KL5KUSB105 chipset USB->Serial Converter driver" /* * Function prototypes */ static int klsi_105_startup(struct usb_serial *serial); static void klsi_105_disconnect(struct usb_serial *serial); static void klsi_105_release(struct usb_serial *serial); static int klsi_105_open(struct tty_struct *tty, struct usb_serial_port *port); static void klsi_105_close(struct usb_serial_port *port); static int klsi_105_write(struct tty_struct *tty, struct usb_serial_port *port, const unsigned char *buf, int count); static void klsi_105_write_bulk_callback(struct urb *urb); static int klsi_105_chars_in_buffer(struct tty_struct *tty); static int klsi_105_write_room(struct tty_struct *tty); static void klsi_105_read_bulk_callback(struct urb *urb); static void klsi_105_set_termios(struct tty_struct *tty, struct usb_serial_port *port, struct ktermios *old); static void klsi_105_throttle(struct tty_struct *tty); static void klsi_105_unthrottle(struct tty_struct *tty); static int klsi_105_tiocmget(struct tty_struct *tty, struct file *file); static int klsi_105_tiocmset(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear); /* * All of the device info needed for the KLSI converters. */ static struct usb_device_id id_table [] = { { USB_DEVICE(PALMCONNECT_VID, PALMCONNECT_PID) }, { USB_DEVICE(KLSI_VID, KLSI_KL5KUSB105D_PID) }, { } /* Terminating entry */ }; MODULE_DEVICE_TABLE(usb, id_table); static struct usb_driver kl5kusb105d_driver = { .name = "kl5kusb105d", .probe = usb_serial_probe, .disconnect = usb_serial_disconnect, .id_table = id_table, .no_dynamic_id = 1, }; static struct usb_serial_driver kl5kusb105d_device = { .driver = { .owner = THIS_MODULE, .name = "kl5kusb105d", }, .description = "KL5KUSB105D / PalmConnect", .usb_driver = &kl5kusb105d_driver, .id_table = id_table, .num_ports = 1, .open = klsi_105_open, .close = klsi_105_close, .write = klsi_105_write, .write_bulk_callback = klsi_105_write_bulk_callback, .chars_in_buffer = klsi_105_chars_in_buffer, .write_room = klsi_105_write_room, .read_bulk_callback = klsi_105_read_bulk_callback, .set_termios = klsi_105_set_termios, /*.break_ctl = klsi_105_break_ctl,*/ .tiocmget = klsi_105_tiocmget, .tiocmset = klsi_105_tiocmset, .attach = klsi_105_startup, .disconnect = klsi_105_disconnect, .release = klsi_105_release, .throttle = klsi_105_throttle, .unthrottle = klsi_105_unthrottle, }; struct klsi_105_port_settings { __u8 pktlen; /* always 5, it seems */ __u8 baudrate; __u8 databits; __u8 unknown1; __u8 unknown2; } __attribute__ ((packed)); /* we implement a pool of NUM_URBS urbs per usb_serial */ #define NUM_URBS 1 #define URB_TRANSFER_BUFFER_SIZE 64 struct klsi_105_private { struct klsi_105_port_settings cfg; struct ktermios termios; unsigned long line_state; /* modem line settings */ /* write pool */ struct urb *write_urb_pool[NUM_URBS]; spinlock_t lock; unsigned long bytes_in; unsigned long bytes_out; }; /* * Handle vendor specific USB requests */ #define KLSI_TIMEOUT 5000 /* default urb timeout */ static int klsi_105_chg_port_settings(struct usb_serial_port *port, struct klsi_105_port_settings *settings) { int rc; rc = usb_control_msg(port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0), KL5KUSB105A_SIO_SET_DATA, USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_INTERFACE, 0, /* value */ 0, /* index */ settings, sizeof(struct klsi_105_port_settings), KLSI_TIMEOUT); if (rc < 0) dev_err(&port->dev, "Change port settings failed (error = %d)\n", rc); dev_info(&port->serial->dev->dev, "%d byte block, baudrate %x, databits %d, u1 %d, u2 %d\n", settings->pktlen, settings->baudrate, settings->databits, settings->unknown1, settings->unknown2); return rc; } /* klsi_105_chg_port_settings */ /* translate a 16-bit status value from the device to linux's TIO bits */ static unsigned long klsi_105_status2linestate(const __u16 status) { unsigned long res = 0; res = ((status & KL5KUSB105A_DSR) ? TIOCM_DSR : 0) | ((status & KL5KUSB105A_CTS) ? TIOCM_CTS : 0) ; return res; } /* * Read line control via vendor command and return result through * *line_state_p */ /* It seems that the status buffer has always only 2 bytes length */ #define KLSI_STATUSBUF_LEN 2 static int klsi_105_get_line_state(struct usb_serial_port *port, unsigned long *line_state_p) { int rc; __u8 status_buf[KLSI_STATUSBUF_LEN] = { -1, -1}; __u16 status; dev_info(&port->serial->dev->dev, "sending SIO Poll request\n"); rc = usb_control_msg(port->serial->dev, usb_rcvctrlpipe(port->serial->dev, 0), KL5KUSB105A_SIO_POLL, USB_TYPE_VENDOR | USB_DIR_IN, 0, /* value */ 0, /* index */ status_buf, KLSI_STATUSBUF_LEN, 10000 ); if (rc < 0) dev_err(&port->dev, "Reading line status failed (error = %d)\n", rc); else { status = get_unaligned_le16(status_buf); dev_info(&port->serial->dev->dev, "read status %x %x", status_buf[0], status_buf[1]); *line_state_p = klsi_105_status2linestate(status); } return rc; } /* * Driver's tty interface functions */ static int klsi_105_startup(struct usb_serial *serial) { struct klsi_105_private *priv; int i, j; /* check if we support the product id (see keyspan.c) * FIXME */ /* allocate the private data structure */ for (i = 0; i < serial->num_ports; i++) { priv = kmalloc(sizeof(struct klsi_105_private), GFP_KERNEL); if (!priv) { dbg("%skmalloc for klsi_105_private failed.", __func__); i--; goto err_cleanup; } /* set initial values for control structures */ priv->cfg.pktlen = 5; priv->cfg.baudrate = kl5kusb105a_sio_b9600; priv->cfg.databits = kl5kusb105a_dtb_8; priv->cfg.unknown1 = 0; priv->cfg.unknown2 = 1; priv->line_state = 0; priv->bytes_in = 0; priv->bytes_out = 0; usb_set_serial_port_data(serial->port[i], priv); spin_lock_init(&priv->lock); for (j = 0; j < NUM_URBS; j++) { struct urb *urb = usb_alloc_urb(0, GFP_KERNEL); priv->write_urb_pool[j] = urb; if (urb == NULL) { dev_err(&serial->dev->dev, "No more urbs???\n"); goto err_cleanup; } urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); if (!urb->transfer_buffer) { dev_err(&serial->dev->dev, "%s - out of memory for urb buffers.\n", __func__); goto err_cleanup; } } /* priv->termios is left uninitalized until port opening */ init_waitqueue_head(&serial->port[i]->write_wait); } return 0; err_cleanup: for (; i >= 0; i--) { priv = usb_get_serial_port_data(serial->port[i]); for (j = 0; j < NUM_URBS; j++) { if (priv->write_urb_pool[j]) { kfree(priv->write_urb_pool[j]->transfer_buffer); usb_free_urb(priv->write_urb_pool[j]); } } usb_set_serial_port_data(serial->port[i], NULL); } return -ENOMEM; } /* klsi_105_startup */ static void klsi_105_disconnect(struct usb_serial *serial) { int i; dbg("%s", __func__); /* stop reads and writes on all ports */ for (i = 0; i < serial->num_ports; ++i) { struct klsi_105_private *priv = usb_get_serial_port_data(serial->port[i]); if (priv) { /* kill our write urb pool */ int j; struct urb **write_urbs = priv->write_urb_pool; for (j = 0; j < NUM_URBS; j++) { if (write_urbs[j]) { usb_kill_urb(write_urbs[j]); usb_free_urb(write_urbs[j]); } } } } } /* klsi_105_disconnect */ static void klsi_105_release(struct usb_serial *serial) { int i; dbg("%s", __func__); for (i = 0; i < serial->num_ports; ++i) { struct klsi_105_private *priv = usb_get_serial_port_data(serial->port[i]); kfree(priv); } } /* klsi_105_release */ static int klsi_105_open(struct tty_struct *tty, struct usb_serial_port *port) { struct klsi_105_private *priv = usb_get_serial_port_data(port); int retval = 0; int rc; int i; unsigned long line_state; struct klsi_105_port_settings cfg; unsigned long flags; dbg("%s port %d", __func__, port->number); /* Do a defined restart: * Set up sane default baud rate and send the 'READ_ON' * vendor command. * FIXME: set modem line control (how?) * Then read the modem line control and store values in * priv->line_state. */ cfg.pktlen = 5; cfg.baudrate = kl5kusb105a_sio_b9600; cfg.databits = kl5kusb105a_dtb_8; cfg.unknown1 = 0; cfg.unknown2 = 1; klsi_105_chg_port_settings(port, &cfg); /* set up termios structure */ spin_lock_irqsave(&priv->lock, flags); priv->termios.c_iflag = tty->termios->c_iflag; priv->termios.c_oflag = tty->termios->c_oflag; priv->termios.c_cflag = tty->termios->c_cflag; priv->termios.c_lflag = tty->termios->c_lflag; for (i = 0; i < NCCS; i++) priv->termios.c_cc[i] = tty->termios->c_cc[i]; priv->cfg.pktlen = cfg.pktlen; priv->cfg.baudrate = cfg.baudrate; priv->cfg.databits = cfg.databits; priv->cfg.unknown1 = cfg.unknown1; priv->cfg.unknown2 = cfg.unknown2; spin_unlock_irqrestore(&priv->lock, flags); /* READ_ON and urb submission */ usb_fill_bulk_urb(port->read_urb, port->serial->dev, usb_rcvbulkpipe(port->serial->dev, port->bulk_in_endpointAddress), port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length, klsi_105_read_bulk_callback, port); rc = usb_submit_urb(port->read_urb, GFP_KERNEL); if (rc) { dev_err(&port->dev, "%s - failed submitting read urb, " "error %d\n", __func__, rc); retval = rc; goto exit; } rc = usb_control_msg(port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0), KL5KUSB105A_SIO_CONFIGURE, USB_TYPE_VENDOR|USB_DIR_OUT|USB_RECIP_INTERFACE, KL5KUSB105A_SIO_CONFIGURE_READ_ON, 0, /* index */ NULL, 0, KLSI_TIMEOUT); if (rc < 0) { dev_err(&port->dev, "Enabling read failed (error = %d)\n", rc); retval = rc; } else dbg("%s - enabled reading", __func__); rc = klsi_105_get_line_state(port, &line_state); if (rc >= 0) { spin_lock_irqsave(&priv->lock, flags); priv->line_state = line_state; spin_unlock_irqrestore(&priv->lock, flags); dbg("%s - read line state 0x%lx", __func__, line_state); retval = 0; } else retval = rc; exit: return retval; } /* klsi_105_open */ static void klsi_105_close(struct usb_serial_port *port) { struct klsi_105_private *priv = usb_get_serial_port_data(port); int rc; dbg("%s port %d", __func__, port->number); mutex_lock(&port->serial->disc_mutex); if (!port->serial->disconnected) { /* send READ_OFF */ rc = usb_control_msg(port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0), KL5KUSB105A_SIO_CONFIGURE, USB_TYPE_VENDOR | USB_DIR_OUT, KL5KUSB105A_SIO_CONFIGURE_READ_OFF, 0, /* index */ NULL, 0, KLSI_TIMEOUT); if (rc < 0) dev_err(&port->dev, "Disabling read failed (error = %d)\n", rc); } mutex_unlock(&port->serial->disc_mutex); /* shutdown our bulk reads and writes */ usb_kill_urb(port->write_urb); usb_kill_urb(port->read_urb); /* unlink our write pool */ /* FIXME */ /* wgg - do I need this? I think so. */ usb_kill_urb(port->interrupt_in_urb); dev_info(&port->serial->dev->dev, "port stats: %ld bytes in, %ld bytes out\n", priv->bytes_in, priv->bytes_out); } /* klsi_105_close */ /* We need to write a complete 64-byte data block and encode the * number actually sent in the first double-byte, LSB-order. That * leaves at most 62 bytes of payload. */ #define KLSI_105_DATA_OFFSET 2 /* in the bulk urb data block */ static int klsi_105_write(struct tty_struct *tty, struct usb_serial_port *port, const unsigned char *buf, int count) { struct klsi_105_private *priv = usb_get_serial_port_data(port); int result, size; int bytes_sent = 0; dbg("%s - port %d", __func__, port->number); while (count > 0) { /* try to find a free urb (write 0 bytes if none) */ struct urb *urb = NULL; unsigned long flags; int i; /* since the pool is per-port we might not need the spin lock !? */ spin_lock_irqsave(&priv->lock, flags); for (i = 0; i < NUM_URBS; i++) { if (priv->write_urb_pool[i]->status != -EINPROGRESS) { urb = priv->write_urb_pool[i]; dbg("%s - using pool URB %d", __func__, i); break; } } spin_unlock_irqrestore(&priv->lock, flags); if (urb == NULL) { dbg("%s - no more free urbs", __func__); goto exit; } if (urb->transfer_buffer == NULL) { urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_ATOMIC); if (urb->transfer_buffer == NULL) { dev_err(&port->dev, "%s - no more kernel memory...\n", __func__); goto exit; } } size = min(count, port->bulk_out_size - KLSI_105_DATA_OFFSET); size = min(size, URB_TRANSFER_BUFFER_SIZE - KLSI_105_DATA_OFFSET); memcpy(urb->transfer_buffer + KLSI_105_DATA_OFFSET, buf, size); /* write payload size into transfer buffer */ ((__u8 *)urb->transfer_buffer)[0] = (__u8) (size & 0xFF); ((__u8 *)urb->transfer_buffer)[1] = (__u8) ((size & 0xFF00)>>8); /* set up our urb */ usb_fill_bulk_urb(urb, port->serial->dev, usb_sndbulkpipe(port->serial->dev, port->bulk_out_endpointAddress), urb->transfer_buffer, URB_TRANSFER_BUFFER_SIZE, klsi_105_write_bulk_callback, port); /* send the data out the bulk port */ result = usb_submit_urb(urb, GFP_ATOMIC); if (result) { dev_err(&port->dev, "%s - failed submitting write urb, error %d\n", __func__, result); goto exit; } buf += size; bytes_sent += size; count -= size; } exit: /* lockless, but it's for debug info only... */ priv->bytes_out += bytes_sent; return bytes_sent; /* that's how much we wrote */ } /* klsi_105_write */ static void klsi_105_write_bulk_callback(struct urb *urb) { struct usb_serial_port *port = urb->context; int status = urb->status; dbg("%s - port %d", __func__, port->number); if (status) { dbg("%s - nonzero write bulk status received: %d", __func__, status); return; } usb_serial_port_softint(port); } /* klsi_105_write_bulk_completion_callback */ /* return number of characters currently in the writing process */ static int klsi_105_chars_in_buffer(struct tty_struct *tty) { struct usb_serial_port *port = tty->driver_data; int chars = 0; int i; unsigned long flags; struct klsi_105_private *priv = usb_get_serial_port_data(port); spin_lock_irqsave(&priv->lock, flags); for (i = 0; i < NUM_URBS; ++i) { if (priv->write_urb_pool[i]->status == -EINPROGRESS) chars += URB_TRANSFER_BUFFER_SIZE; } spin_unlock_irqrestore(&priv->lock, flags); dbg("%s - returns %d", __func__, chars); return chars; } static int klsi_105_write_room(struct tty_struct *tty) { struct usb_serial_port *port = tty->driver_data; unsigned long flags; int i; int room = 0; struct klsi_105_private *priv = usb_get_serial_port_data(port); spin_lock_irqsave(&priv->lock, flags); for (i = 0; i < NUM_URBS; ++i) { if (priv->write_urb_pool[i]->status != -EINPROGRESS) room += URB_TRANSFER_BUFFER_SIZE; } spin_unlock_irqrestore(&priv->lock, flags); dbg("%s - returns %d", __func__, room); return room; } static void klsi_105_read_bulk_callback(struct urb *urb) { struct usb_serial_port *port = urb->context; struct klsi_105_private *priv = usb_get_serial_port_data(port); struct tty_struct *tty; unsigned char *data = urb->transfer_buffer; int rc; int status = urb->status; dbg("%s - port %d", __func__, port->number); /* The urb might have been killed. */ if (status) { dbg("%s - nonzero read bulk status received: %d", __func__, status); return; } /* The data received is again preceded by a length double-byte in LSB- * first order (see klsi_105_write() ) */ if (urb->actual_length == 0) { /* empty urbs seem to happen, we ignore them */ /* dbg("%s - emtpy URB", __func__); */ ; } else if (urb->actual_length <= 2) { dbg("%s - size %d URB not understood", __func__, urb->actual_length); usb_serial_debug_data(debug, &port->dev, __func__, urb->actual_length, data); } else { int bytes_sent = ((__u8 *) data)[0] + ((unsigned int) ((__u8 *) data)[1] << 8); tty = tty_port_tty_get(&port->port); /* we should immediately resubmit the URB, before attempting * to pass the data on to the tty layer. But that needs locking * against re-entry an then mixed-up data because of * intermixed tty_flip_buffer_push()s * FIXME */ usb_serial_debug_data(debug, &port->dev, __func__, urb->actual_length, data); if (bytes_sent + 2 > urb->actual_length) { dbg("%s - trying to read more data than available" " (%d vs. %d)", __func__, bytes_sent+2, urb->actual_length); /* cap at implied limit */ bytes_sent = urb->actual_length - 2; } tty_buffer_request_room(tty, bytes_sent); tty_insert_flip_string(tty, data + 2, bytes_sent); tty_flip_buffer_push(tty); tty_kref_put(tty); /* again lockless, but debug info only */ priv->bytes_in += bytes_sent; } /* Continue trying to always read */ usb_fill_bulk_urb(port->read_urb, port->serial->dev, usb_rcvbulkpipe(port->serial->dev, port->bulk_in_endpointAddress), port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length, klsi_105_read_bulk_callback, port); rc = usb_submit_urb(port->read_urb, GFP_ATOMIC); if (rc) dev_err(&port->dev, "%s - failed resubmitting read urb, error %d\n", __func__, rc); } /* klsi_105_read_bulk_callback */ static void klsi_105_set_termios(struct tty_struct *tty, struct usb_serial_port *port, struct ktermios *old_termios) { struct klsi_105_private *priv = usb_get_serial_port_data(port); unsigned int iflag = tty->termios->c_iflag; unsigned int old_iflag = old_termios->c_iflag; unsigned int cflag = tty->termios->c_cflag; unsigned int old_cflag = old_termios->c_cflag; struct klsi_105_port_settings cfg; unsigned long flags; speed_t baud; /* lock while we are modifying the settings */ spin_lock_irqsave(&priv->lock, flags); /* * Update baud rate */ baud = tty_get_baud_rate(tty); if ((cflag & CBAUD) != (old_cflag & CBAUD)) { /* reassert DTR and (maybe) RTS on transition from B0 */ if ((old_cflag & CBAUD) == B0) { dbg("%s: baud was B0", __func__); #if 0 priv->control_state |= TIOCM_DTR; /* don't set RTS if using hardware flow control */ if (!(old_cflag & CRTSCTS)) priv->control_state |= TIOCM_RTS; mct_u232_set_modem_ctrl(serial, priv->control_state); #endif } } switch (baud) { case 0: /* handled below */ break; case 1200: priv->cfg.baudrate = kl5kusb105a_sio_b1200; break; case 2400: priv->cfg.baudrate = kl5kusb105a_sio_b2400; break; case 4800: priv->cfg.baudrate = kl5kusb105a_sio_b4800; break; case 9600: priv->cfg.baudrate = kl5kusb105a_sio_b9600; break; case 19200: priv->cfg.baudrate = kl5kusb105a_sio_b19200; break; case 38400: priv->cfg.baudrate = kl5kusb105a_sio_b38400; break; case 57600: priv->cfg.baudrate = kl5kusb105a_sio_b57600; break; case 115200: priv->cfg.baudrate = kl5kusb105a_sio_b115200; break; default: dbg("KLSI USB->Serial converter:" " unsupported baudrate request, using default of 9600"); priv->cfg.baudrate = kl5kusb105a_sio_b9600; baud = 9600; break; } if ((cflag & CBAUD) == B0) { dbg("%s: baud is B0", __func__); /* Drop RTS and DTR */ /* maybe this should be simulated by sending read * disable and read enable messages? */ ; #if 0 priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS); mct_u232_set_modem_ctrl(serial, priv->control_state); #endif } tty_encode_baud_rate(tty, baud, baud); if ((cflag & CSIZE) != (old_cflag & CSIZE)) { /* set the number of data bits */ switch (cflag & CSIZE) { case CS5: dbg("%s - 5 bits/byte not supported", __func__); spin_unlock_irqrestore(&priv->lock, flags); return ; case CS6: dbg("%s - 6 bits/byte not supported", __func__); spin_unlock_irqrestore(&priv->lock, flags); return ; case CS7: priv->cfg.databits = kl5kusb105a_dtb_7; break; case CS8: priv->cfg.databits = kl5kusb105a_dtb_8; break; default: dev_err(&port->dev, "CSIZE was not CS5-CS8, using default of 8\n"); priv->cfg.databits = kl5kusb105a_dtb_8; break; } } /* * Update line control register (LCR) */ if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD)) || (cflag & CSTOPB) != (old_cflag & CSTOPB)) { /* Not currently supported */ tty->termios->c_cflag &= ~(PARENB|PARODD|CSTOPB); #if 0 priv->last_lcr = 0; /* set the parity */ if (cflag & PARENB) priv->last_lcr |= (cflag & PARODD) ? MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN; else priv->last_lcr |= MCT_U232_PARITY_NONE; /* set the number of stop bits */ priv->last_lcr |= (cflag & CSTOPB) ? MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1; mct_u232_set_line_ctrl(serial, priv->last_lcr); #endif ; } /* * Set flow control: well, I do not really now how to handle DTR/RTS. * Just do what we have seen with SniffUSB on Win98. */ if ((iflag & IXOFF) != (old_iflag & IXOFF) || (iflag & IXON) != (old_iflag & IXON) || (cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { /* Not currently supported */ tty->termios->c_cflag &= ~CRTSCTS; /* Drop DTR/RTS if no flow control otherwise assert */ #if 0 if ((iflag & IXOFF) || (iflag & IXON) || (cflag & CRTSCTS)) priv->control_state |= TIOCM_DTR | TIOCM_RTS; else priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS); mct_u232_set_modem_ctrl(serial, priv->control_state); #endif ; } memcpy(&cfg, &priv->cfg, sizeof(cfg)); spin_unlock_irqrestore(&priv->lock, flags); /* now commit changes to device */ klsi_105_chg_port_settings(port, &cfg); } /* klsi_105_set_termios */ #if 0 static void mct_u232_break_ctl(struct tty_struct *tty, int break_state) { struct usb_serial_port *port = tty->driver_data; struct usb_serial *serial = port->serial; struct mct_u232_private *priv = (struct mct_u232_private *)port->private; unsigned char lcr = priv->last_lcr; dbg("%sstate=%d", __func__, break_state); /* LOCKING */ if (break_state) lcr |= MCT_U232_SET_BREAK; mct_u232_set_line_ctrl(serial, lcr); } /* mct_u232_break_ctl */ #endif static int klsi_105_tiocmget(struct tty_struct *tty, struct file *file) { struct usb_serial_port *port = tty->driver_data; struct klsi_105_private *priv = usb_get_serial_port_data(port); unsigned long flags; int rc; unsigned long line_state; dbg("%s - request, just guessing", __func__); rc = klsi_105_get_line_state(port, &line_state); if (rc < 0) { dev_err(&port->dev, "Reading line control failed (error = %d)\n", rc); /* better return value? EAGAIN? */ return rc; } spin_lock_irqsave(&priv->lock, flags); priv->line_state = line_state; spin_unlock_irqrestore(&priv->lock, flags); dbg("%s - read line state 0x%lx", __func__, line_state); return (int)line_state; } static int klsi_105_tiocmset(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear) { int retval = -EINVAL; dbg("%s", __func__); /* if this ever gets implemented, it should be done something like this: struct usb_serial *serial = port->serial; struct klsi_105_private *priv = usb_get_serial_port_data(port); unsigned long flags; int control; spin_lock_irqsave (&priv->lock, flags); if (set & TIOCM_RTS) priv->control_state |= TIOCM_RTS; if (set & TIOCM_DTR) priv->control_state |= TIOCM_DTR; if (clear & TIOCM_RTS) priv->control_state &= ~TIOCM_RTS; if (clear & TIOCM_DTR) priv->control_state &= ~TIOCM_DTR; control = priv->control_state; spin_unlock_irqrestore (&priv->lock, flags); retval = mct_u232_set_modem_ctrl(serial, control); */ return retval; } static void klsi_105_throttle(struct tty_struct *tty) { struct usb_serial_port *port = tty->driver_data; dbg("%s - port %d", __func__, port->number); usb_kill_urb(port->read_urb); } static void klsi_105_unthrottle(struct tty_struct *tty) { struct usb_serial_port *port = tty->driver_data; int result; dbg("%s - port %d", __func__, port->number); port->read_urb->dev = port->serial->dev; result = usb_submit_urb(port->read_urb, GFP_ATOMIC); if (result) dev_err(&port->dev, "%s - failed submitting read urb, error %d\n", __func__, result); } static int __init klsi_105_init(void) { int retval; retval = usb_serial_register(&kl5kusb105d_device); if (retval) goto failed_usb_serial_register; retval = usb_register(&kl5kusb105d_driver); if (retval) goto failed_usb_register; printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" DRIVER_DESC "\n"); return 0; failed_usb_register: usb_serial_deregister(&kl5kusb105d_device); failed_usb_serial_register: return retval; } static void __exit klsi_105_exit(void) { usb_deregister(&kl5kusb105d_driver); usb_serial_deregister(&kl5kusb105d_device); } module_init(klsi_105_init); module_exit(klsi_105_exit); MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_LICENSE("GPL"); module_param(debug, bool, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(debug, "enable extensive debugging messages"); /* vim: set sts=8 ts=8 sw=8: */