/* * USB Serial Converter driver * * Copyright (C) 1999, 2000 * Greg Kroah-Hartman (greg@kroah.com) * * 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. * * This driver was originally based on the ACM driver by Armin Fuerst (which was * based on a driver by Brad Keryan) * * See Documentation/usb/usb-serial.txt for more information on using this driver * * (07/03/2000) gkh * Added more debugging to serial_ioctl call * * (06/25/2000) gkh * Changed generic_write_bulk_callback to not call wake_up_interruptible * directly, but to have port_softint do it at a safer time. * * (06/23/2000) gkh * Cleaned up debugging statements in a quest to find UHCI timeout bug. * * (05/22/2000) gkh * Changed the makefile, enabling the big CONFIG_USB_SERIAL_SOMTHING to be * removed from the individual device source files. * * (05/03/2000) gkh * Added the Digi Acceleport driver from Al Borchers and Peter Berger. * * (05/02/2000) gkh * Changed devfs and tty register code to work properly now. This was based on * the ACM driver changes by Vojtech Pavlik. * * (04/27/2000) Ryan VanderBijl * Put calls to *_paranoia_checks into one function. * * (04/23/2000) gkh * Fixed bug that Randy Dunlap found for Generic devices with no bulk out ports. * Moved when the startup code printed out the devices that are supported. * * (04/19/2000) gkh * Added driver for ZyXEL omni.net lcd plus ISDN TA * Made startup info message specify which drivers were compiled in. * * (04/03/2000) gkh * Changed the probe process to remove the module unload races. * Changed where the tty layer gets initialized to have devfs work nicer. * Added initial devfs support. * * (03/26/2000) gkh * Split driver up into device specific pieces. * * (03/19/2000) gkh * Fixed oops that could happen when device was removed while a program * was talking to the device. * Removed the static urbs and now all urbs are created and destroyed * dynamically. * Reworked the internal interface. Now everything is based on the * usb_serial_port structure instead of the larger usb_serial structure. * This fixes the bug that a multiport device could not have more than * one port open at one time. * * (03/17/2000) gkh * Added config option for debugging messages. * Added patch for keyspan pda from Brian Warner. * * (03/06/2000) gkh * Added the keyspan pda code from Brian Warner * Moved a bunch of the port specific stuff into its own structure. This * is in anticipation of the true multiport devices (there's a bug if you * try to access more than one port of any multiport device right now) * * (02/21/2000) gkh * Made it so that any serial devices only have to specify which functions * they want to overload from the generic function calls (great, * inheritance in C, in a driver, just what I wanted...) * Added support for set_termios and ioctl function calls. No drivers take * advantage of this yet. * Removed the #ifdef MODULE, now there is no module specific code. * Cleaned up a few comments in usb-serial.h that were wrong (thanks again * to Miles Lott). * Small fix to get_free_serial. * * (02/14/2000) gkh * Removed the Belkin and Peracom functionality from the driver due to * the lack of support from the vendor, and me not wanting people to * accidenatly buy the device, expecting it to work with Linux. * Added read_bulk_callback and write_bulk_callback to the type structure * for the needs of the FTDI and WhiteHEAT driver. * Changed all reverences to FTDI to FTDI_SIO at the request of Bill * Ryder. * Changed the output urb size back to the max endpoint size to make * the ftdi_sio driver have it easier, and due to the fact that it didn't * really increase the speed any. * * (02/11/2000) gkh * Added VISOR_FUNCTION_CONSOLE to the visor startup function. This was a * patch from Miles Lott (milos@insync.net). * Fixed bug with not restoring the minor range that a device grabs, if * the startup function fails (thanks Miles for finding this). * * (02/05/2000) gkh * Added initial framework for the Keyspan PDA serial converter so that * Brian Warner has a place to put his code. * Made the ezusb specific functions generic enough that different * devices can use them (whiteheat and keyspan_pda both need them). * Split out a whole bunch of structure and other stuff to a seperate * usb-serial.h file. * Made the Visor connection messages a little more understandable, now * that Miles Lott (milos@insync.net) has gotten the Generic channel to * work. Also made them always show up in the log file. * * (01/25/2000) gkh * Added initial framework for FTDI serial converter so that Bill Ryder * has a place to put his code. * Added the vendor specific info from Handspring. Now we can print out * informational debug messages as well as understand what is happening. * * (01/23/2000) gkh * Fixed problem of crash when trying to open a port that didn't have a * device assigned to it. Made the minor node finding a little smarter, * now it looks to find a continous space for the new device. * * (01/21/2000) gkh * Fixed bug in visor_startup with patch from Miles Lott (milos@insync.net) * Fixed get_serial_by_minor which was all messed up for multi port * devices. Fixed multi port problem for generic devices. Now the number * of ports is determined by the number of bulk out endpoints for the * generic device. * * (01/19/2000) gkh * Removed lots of cruft that was around from the old (pre urb) driver * interface. * Made the serial_table dynamic. This should save lots of memory when * the number of minor nodes goes up to 256. * Added initial support for devices that have more than one port. * Added more debugging comments for the Visor, and added a needed * set_configuration call. * * (01/17/2000) gkh * Fixed the WhiteHEAT firmware (my processing tool had a bug) * and added new debug loader firmware for it. * Removed the put_char function as it isn't really needed. * Added visor startup commands as found by the Win98 dump. * * (01/13/2000) gkh * Fixed the vendor id for the generic driver to the one I meant it to be. * * (01/12/2000) gkh * Forget the version numbering...that's pretty useless... * Made the driver able to be compiled so that the user can select which * converter they want to use. This allows people who only want the Visor * support to not pay the memory size price of the WhiteHEAT. * Fixed bug where the generic driver (idVendor=0000 and idProduct=0000) * grabbed the root hub. Not good. * * version 0.4.0 (01/10/2000) gkh * Added whiteheat.h containing the firmware for the ConnectTech WhiteHEAT * device. Added startup function to allow firmware to be downloaded to * a device if it needs to be. * Added firmware download logic to the WhiteHEAT device. * Started to add #defines to split up the different drivers for potential * configuration option. * * version 0.3.1 (12/30/99) gkh * Fixed problems with urb for bulk out. * Added initial support for multiple sets of endpoints. This enables * the Handspring Visor to be attached successfully. Only the first * bulk in / bulk out endpoint pair is being used right now. * * version 0.3.0 (12/27/99) gkh * Added initial support for the Handspring Visor based on a patch from * Miles Lott (milos@sneety.insync.net) * Cleaned up the code a bunch and converted over to using urbs only. * * version 0.2.3 (12/21/99) gkh * Added initial support for the Connect Tech WhiteHEAT converter. * Incremented the number of ports in expectation of getting the * WhiteHEAT to work properly (4 ports per connection). * Added notification on insertion and removal of what port the * device is/was connected to (and what kind of device it was). * * version 0.2.2 (12/16/99) gkh * Changed major number to the new allocated number. We're legal now! * * version 0.2.1 (12/14/99) gkh * Fixed bug that happens when device node is opened when there isn't a * device attached to it. Thanks to marek@webdesign.no for noticing this. * * version 0.2.0 (11/10/99) gkh * Split up internals to make it easier to add different types of serial * converters to the code. * Added a "generic" driver that gets it's vendor and product id * from when the module is loaded. Thanks to David E. Nelson (dnelson@jump.net) * for the idea and sample code (from the usb scanner driver.) * Cleared up any licensing questions by releasing it under the GNU GPL. * * version 0.1.2 (10/25/99) gkh * Fixed bug in detecting device. * * version 0.1.1 (10/05/99) gkh * Changed the major number to not conflict with anything else. * * version 0.1 (09/28/99) gkh * Can recognize the two different devices and start up a read from * device when asked to. Writes also work. No control signals yet, this * all is vendor specific data (i.e. no spec), also no control for * different baud rates or other bit settings. * Currently we are using the same devid as the acm driver. This needs * to change. * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef CONFIG_USB_SERIAL_DEBUG #define DEBUG #else #undef DEBUG #endif #include /* Module information */ MODULE_AUTHOR("Greg Kroah-Hartman, greg@kroah.com, http://www.kroah.com/linux-usb/"); MODULE_DESCRIPTION("USB Serial Driver"); #include "usb-serial.h" #define MAX(a,b) (((a)>(b))?(a):(b)) /* function prototypes for a "generic" type serial converter (no flow control, not all endpoints needed) */ /* need to always compile these in, as some of the other devices use these functions as their own. */ /* if a driver does not provide a function pointer, the generic function will be called. */ static int generic_open (struct usb_serial_port *port, struct file *filp); static void generic_close (struct usb_serial_port *port, struct file *filp); static int generic_write (struct usb_serial_port *port, int from_user, const unsigned char *buf, int count); static int generic_write_room (struct usb_serial_port *port); static int generic_chars_in_buffer (struct usb_serial_port *port); static void generic_read_bulk_callback (struct urb *urb); static void generic_write_bulk_callback (struct urb *urb); #ifdef CONFIG_USB_SERIAL_GENERIC static __u16 vendor = 0x05f9; static __u16 product = 0xffff; MODULE_PARM(vendor, "i"); MODULE_PARM_DESC(vendor, "User specified USB idVendor"); MODULE_PARM(product, "i"); MODULE_PARM_DESC(product, "User specified USB idProduct"); /* All of the device info needed for the Generic Serial Converter */ static struct usb_serial_device_type generic_device = { name: "Generic", idVendor: &vendor, /* use the user specified vendor id */ idProduct: &product, /* use the user specified product id */ needs_interrupt_in: DONT_CARE, /* don't have to have an interrupt in endpoint */ needs_bulk_in: DONT_CARE, /* don't have to have a bulk in endpoint */ needs_bulk_out: DONT_CARE, /* don't have to have a bulk out endpoint */ num_interrupt_in: NUM_DONT_CARE, num_bulk_in: NUM_DONT_CARE, num_bulk_out: NUM_DONT_CARE, num_ports: 1, }; #endif /* To add support for another serial converter, create a usb_serial_device_type structure for that device, and add it to this list, making sure that the last entry is NULL. */ static struct usb_serial_device_type *usb_serial_devices[] = { #ifdef CONFIG_USB_SERIAL_GENERIC &generic_device, #endif #ifdef CONFIG_USB_SERIAL_WHITEHEAT &whiteheat_fake_device, &whiteheat_device, #endif #ifdef CONFIG_USB_SERIAL_VISOR &handspring_device, #endif #ifdef CONFIG_USB_SERIAL_FTDI_SIO &ftdi_sio_device, #endif #ifdef CONFIG_USB_SERIAL_KEYSPAN_PDA &keyspan_pda_fake_device, &keyspan_pda_device, #endif #ifdef CONFIG_USB_SERIAL_OMNINET &zyxel_omninet_device, #endif #ifdef CONFIG_USB_SERIAL_DIGI_ACCELEPORT &digi_acceleport_device, #endif #ifdef CONFIG_USB_SERIAL_KEYSPAN &keyspan_usa18x_pre_device, &keyspan_usa19_pre_device, &keyspan_usa19w_pre_device, &keyspan_usa28_pre_device, &keyspan_usa28x_pre_device, &keyspan_usa18x_device, &keyspan_usa19_device, &keyspan_usa19w_device, &keyspan_usa28_device, &keyspan_usa28x_device, #endif NULL }; /* local function prototypes */ static int serial_open (struct tty_struct *tty, struct file * filp); static void serial_close (struct tty_struct *tty, struct file * filp); static int serial_write (struct tty_struct * tty, int from_user, const unsigned char *buf, int count); static int serial_write_room (struct tty_struct *tty); static int serial_chars_in_buffer (struct tty_struct *tty); static void serial_throttle (struct tty_struct * tty); static void serial_unthrottle (struct tty_struct * tty); static int serial_ioctl (struct tty_struct *tty, struct file * file, unsigned int cmd, unsigned long arg); static void serial_set_termios (struct tty_struct *tty, struct termios * old); static void * usb_serial_probe(struct usb_device *dev, unsigned int ifnum); static void usb_serial_disconnect(struct usb_device *dev, void *ptr); static struct usb_driver usb_serial_driver = { name: "serial", probe: usb_serial_probe, disconnect: usb_serial_disconnect, }; static int serial_refcount; static struct tty_driver serial_tty_driver; static struct tty_struct * serial_tty[SERIAL_TTY_MINORS]; static struct termios * serial_termios[SERIAL_TTY_MINORS]; static struct termios * serial_termios_locked[SERIAL_TTY_MINORS]; static struct usb_serial *serial_table[SERIAL_TTY_MINORS] = {NULL, }; static inline struct usb_serial* get_usb_serial (struct usb_serial_port *port, const char *function) { /* if no port was specified, or it fails a paranoia check */ if (!port || port_paranoia_check (port, function) || serial_paranoia_check (port->serial, function)) { /* then say that we dont have a valid usb_serial thing, which will * end up genrating -ENODEV return values */ return NULL; } return port->serial; } static struct usb_serial *get_serial_by_minor (int minor) { return serial_table[minor]; } static struct usb_serial *get_free_serial (int num_ports, int *minor) { struct usb_serial *serial = NULL; int i, j; int good_spot; dbg(__FUNCTION__ " %d", num_ports); *minor = 0; for (i = 0; i < SERIAL_TTY_MINORS; ++i) { if (serial_table[i]) continue; good_spot = 1; for (j = 1; j <= num_ports-1; ++j) if (serial_table[i+j]) good_spot = 0; if (good_spot == 0) continue; if (!(serial = kmalloc(sizeof(struct usb_serial), GFP_KERNEL))) { err(__FUNCTION__ " - Out of memory"); return NULL; } memset(serial, 0, sizeof(struct usb_serial)); serial->magic = USB_SERIAL_MAGIC; serial_table[i] = serial; *minor = i; dbg(__FUNCTION__ " - minor base = %d", *minor); for (i = *minor+1; (i < (*minor + num_ports)) && (i < SERIAL_TTY_MINORS); ++i) serial_table[i] = serial; return serial; } return NULL; } static void return_serial (struct usb_serial *serial) { int i; dbg(__FUNCTION__); if (serial == NULL) return; for (i = 0; i < serial->num_ports; ++i) { serial_table[serial->minor + i] = NULL; } return; } #ifdef USES_EZUSB_FUNCTIONS /* EZ-USB Control and Status Register. Bit 0 controls 8051 reset */ #define CPUCS_REG 0x7F92 int ezusb_writememory (struct usb_serial *serial, int address, unsigned char *data, int length, __u8 bRequest) { int result; unsigned char *transfer_buffer = kmalloc (length, GFP_KERNEL); // dbg("ezusb_writememory %x, %d", address, length); if (!transfer_buffer) { err(__FUNCTION__ " - kmalloc(%d) failed.", length); return -ENOMEM; } memcpy (transfer_buffer, data, length); result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), bRequest, 0x40, address, 0, transfer_buffer, length, 300); kfree (transfer_buffer); return result; } int ezusb_set_reset (struct usb_serial *serial, unsigned char reset_bit) { int response; dbg(__FUNCTION__ " - %d", reset_bit); response = ezusb_writememory (serial, CPUCS_REG, &reset_bit, 1, 0xa0); if (response < 0) { err(__FUNCTION__ "- %d failed", reset_bit); } return response; } #endif /* USES_EZUSB_FUNCTIONS */ /***************************************************************************** * Driver tty interface functions *****************************************************************************/ static int serial_open (struct tty_struct *tty, struct file * filp) { struct usb_serial *serial; struct usb_serial_port *port; int portNumber; dbg(__FUNCTION__); /* initialize the pointer incase something fails */ tty->driver_data = NULL; /* get the serial object associated with this tty pointer */ serial = get_serial_by_minor (MINOR(tty->device)); if (serial_paranoia_check (serial, __FUNCTION__)) { return -ENODEV; } /* set up our port structure making the tty driver remember our port object, and us it */ portNumber = MINOR(tty->device) - serial->minor; port = &serial->port[portNumber]; tty->driver_data = port; port->tty = tty; /* pass on to the driver specific version of this function if it is available */ if (serial->type->open) { return (serial->type->open(port, filp)); } else { return (generic_open(port, filp)); } } static void serial_close(struct tty_struct *tty, struct file * filp) { struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); if (!serial) { return; } dbg(__FUNCTION__ " - port %d", port->number); if (!port->active) { dbg (__FUNCTION__ " - port not opened"); return; } /* pass on to the driver specific version of this function if it is available */ if (serial->type->close) { serial->type->close(port, filp); } else { generic_close(port, filp); } } static int serial_write (struct tty_struct * tty, int from_user, const unsigned char *buf, int count) { struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); if (!serial) { return -ENODEV; } dbg(__FUNCTION__ " - port %d, %d byte(s)", port->number, count); if (!port->active) { dbg (__FUNCTION__ " - port not opened"); return -EINVAL; } /* pass on to the driver specific version of this function if it is available */ if (serial->type->write) { return (serial->type->write(port, from_user, buf, count)); } else { return (generic_write(port, from_user, buf, count)); } } static int serial_write_room (struct tty_struct *tty) { struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); if (!serial) { return -ENODEV; } dbg(__FUNCTION__ " - port %d", port->number); if (!port->active) { dbg (__FUNCTION__ " - port not open"); return -EINVAL; } /* pass on to the driver specific version of this function if it is available */ if (serial->type->write_room) { return (serial->type->write_room(port)); } else { return (generic_write_room(port)); } } static int serial_chars_in_buffer (struct tty_struct *tty) { struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); if (!serial) { return -ENODEV; } if (!port->active) { dbg (__FUNCTION__ " - port not open"); return -EINVAL; } /* pass on to the driver specific version of this function if it is available */ if (serial->type->chars_in_buffer) { return (serial->type->chars_in_buffer(port)); } else { return (generic_chars_in_buffer(port)); } } static void serial_throttle (struct tty_struct * tty) { struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); if (!serial) { return; } dbg(__FUNCTION__ " - port %d", port->number); if (!port->active) { dbg (__FUNCTION__ " - port not open"); return; } /* pass on to the driver specific version of this function */ if (serial->type->throttle) { serial->type->throttle(port); } return; } static void serial_unthrottle (struct tty_struct * tty) { struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); if (!serial) { return; } dbg(__FUNCTION__ " - port %d", port->number); if (!port->active) { dbg (__FUNCTION__ " - port not open"); return; } /* pass on to the driver specific version of this function */ if (serial->type->unthrottle) { serial->type->unthrottle(port); } return; } static int serial_ioctl (struct tty_struct *tty, struct file * file, unsigned int cmd, unsigned long arg) { struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); if (!serial) { return -ENODEV; } dbg(__FUNCTION__ " - port %d, cmd 0x%.4x", port->number, cmd); if (!port->active) { dbg (__FUNCTION__ " - port not open"); return -ENODEV; } /* pass on to the driver specific version of this function if it is available */ if (serial->type->ioctl) { return (serial->type->ioctl(port, file, cmd, arg)); } else { return -ENOIOCTLCMD; } } static void serial_set_termios (struct tty_struct *tty, struct termios * old) { struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); if (!serial) { return; } dbg(__FUNCTION__ " - port %d", port->number); if (!port->active) { dbg (__FUNCTION__ " - port not open"); return; } /* pass on to the driver specific version of this function if it is available */ if (serial->type->set_termios) { serial->type->set_termios(port, old); } return; } static void serial_break (struct tty_struct *tty, int break_state) { struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); if (!serial) { return; } dbg(__FUNCTION__ " - port %d", port->number); if (!port->active) { dbg (__FUNCTION__ " - port not open"); return; } /* pass on to the driver specific version of this function if it is available */ if (serial->type->break_ctl) { serial->type->break_ctl(port, break_state); } } /***************************************************************************** * generic devices specific driver functions *****************************************************************************/ static int generic_open (struct usb_serial_port *port, struct file *filp) { struct usb_serial *serial = port->serial; dbg(__FUNCTION__ " - port %d", port->number); if (port->active) { dbg (__FUNCTION__ " - device already open"); return -EINVAL; } port->active = 1; /* if we have a bulk interrupt, start reading from it */ if (serial->num_bulk_in) { /*Start reading from the device*/ if (usb_submit_urb(port->read_urb)) dbg(__FUNCTION__ " - usb_submit_urb(read bulk) failed"); } return (0); } static void generic_close (struct usb_serial_port *port, struct file * filp) { struct usb_serial *serial = port->serial; dbg(__FUNCTION__ " - port %d", port->number); /* shutdown any bulk reads that might be going on */ if (serial->num_bulk_out) { usb_unlink_urb (port->write_urb); } if (serial->num_bulk_in) { usb_unlink_urb (port->read_urb); } port->active = 0; } static int generic_write (struct usb_serial_port *port, int from_user, const unsigned char *buf, int count) { struct usb_serial *serial = port->serial; dbg(__FUNCTION__ " - port %d", port->number); if (count == 0) { dbg(__FUNCTION__ " - write request of 0 bytes"); return (0); } /* only do something if we have a bulk out endpoint */ if (serial->num_bulk_out) { if (port->write_urb->status == -EINPROGRESS) { dbg (__FUNCTION__ " - already writing"); return (0); } count = (count > port->bulk_out_size) ? port->bulk_out_size : count; #ifdef DEBUG { int i; printk (KERN_DEBUG __FILE__ ": " __FUNCTION__ " - length = %d, data = ", count); for (i = 0; i < count; ++i) { printk ("%.2x ", buf[i]); } printk ("\n"); } #endif if (from_user) { copy_from_user(port->write_urb->transfer_buffer, buf, count); } else { memcpy (port->write_urb->transfer_buffer, buf, count); } /* send the data out the bulk port */ port->write_urb->transfer_buffer_length = count; if (usb_submit_urb(port->write_urb)) dbg(__FUNCTION__ " - usb_submit_urb(write bulk) failed"); return (count); } /* no bulk out, so return 0 bytes written */ return (0); } static int generic_write_room (struct usb_serial_port *port) { struct usb_serial *serial = port->serial; int room = 0; dbg(__FUNCTION__ " - port %d", port->number); if (serial->num_bulk_out) if (port->write_urb->status != -EINPROGRESS) room = port->bulk_out_size; dbg(__FUNCTION__ " - returns %d", room); return (room); } static int generic_chars_in_buffer (struct usb_serial_port *port) { struct usb_serial *serial = port->serial; int chars = 0; dbg(__FUNCTION__ " - port %d", port->number); if (serial->num_bulk_out) if (port->write_urb->status == -EINPROGRESS) chars = port->write_urb->transfer_buffer_length; dbg (__FUNCTION__ " - returns %d", chars); return (chars); } static void generic_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; dbg(__FUNCTION__ " - port %d", port->number); if (!serial) { dbg(__FUNCTION__ " - bad serial pointer, exiting"); return; } if (urb->status) { dbg(__FUNCTION__ " - nonzero read bulk status received: %d", urb->status); return; } #ifdef DEBUG if (urb->actual_length) { printk (KERN_DEBUG __FILE__ ": " __FUNCTION__ "- length = %d, data = ", urb->actual_length); for (i = 0; i < urb->actual_length; ++i) { printk ("%.2x ", data[i]); } printk ("\n"); } #endif tty = port->tty; if (urb->actual_length) { for (i = 0; i < urb->actual_length ; ++i) { tty_insert_flip_char(tty, data[i], 0); } tty_flip_buffer_push(tty); } /* Continue trying to always read */ if (usb_submit_urb(urb)) dbg(__FUNCTION__ " - failed resubmitting read urb"); return; } static void generic_write_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__); dbg(__FUNCTION__ " - port %d", port->number); if (!serial) { dbg(__FUNCTION__ " - bad serial pointer, exiting"); return; } if (urb->status) { dbg(__FUNCTION__ " - nonzero write bulk status received: %d", urb->status); return; } queue_task(&port->tqueue, &tq_immediate); mark_bh(IMMEDIATE_BH); return; } static void port_softint(void *private) { struct usb_serial_port *port = (struct usb_serial_port *)private; struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); struct tty_struct *tty; dbg(__FUNCTION__ " - port %d", port->number); if (!serial) { return; } tty = port->tty; if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup) { dbg(__FUNCTION__ " - write wakeup call."); (tty->ldisc.write_wakeup)(tty); } wake_up_interruptible(&tty->write_wait); } static void * usb_serial_probe(struct usb_device *dev, unsigned int ifnum) { struct usb_serial *serial = NULL; struct usb_serial_port *port; struct usb_interface_descriptor *interface; struct usb_endpoint_descriptor *endpoint; struct usb_endpoint_descriptor *interrupt_in_endpoint[MAX_NUM_PORTS]; struct usb_endpoint_descriptor *bulk_in_endpoint[MAX_NUM_PORTS]; struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS]; struct usb_serial_device_type *type; int device_num; int minor; int buffer_size; int i; char interrupt_pipe; char bulk_in_pipe; char bulk_out_pipe; int num_interrupt_in = 0; int num_bulk_in = 0; int num_bulk_out = 0; int num_ports; int max_endpoints; /* loop through our list of known serial converters, and see if this device matches. */ for (device_num = 0; usb_serial_devices[device_num]; device_num++) { type = usb_serial_devices[device_num]; dbg ("Looking at %s Vendor id=%.4x Product id=%.4x", type->name, *(type->idVendor), *(type->idProduct)); /* look at the device descriptor */ if ((dev->descriptor.idVendor == *(type->idVendor)) && (dev->descriptor.idProduct == *(type->idProduct))) { dbg("descriptor matches"); break; } } if (!usb_serial_devices[device_num]) { /* no match */ dbg("none matched"); return(NULL); } /* descriptor matches, let's find the endpoints needed */ interrupt_pipe = bulk_in_pipe = bulk_out_pipe = HAS_NOT; /* check out the endpoints */ interface = &dev->actconfig->interface[ifnum].altsetting[0]; for (i = 0; i < interface->bNumEndpoints; ++i) { endpoint = &interface->endpoint[i]; if ((endpoint->bEndpointAddress & 0x80) && ((endpoint->bmAttributes & 3) == 0x02)) { /* we found a bulk in endpoint */ dbg("found bulk in"); bulk_in_pipe = HAS; bulk_in_endpoint[num_bulk_in] = endpoint; ++num_bulk_in; } if (((endpoint->bEndpointAddress & 0x80) == 0x00) && ((endpoint->bmAttributes & 3) == 0x02)) { /* we found a bulk out endpoint */ dbg("found bulk out"); bulk_out_pipe = HAS; bulk_out_endpoint[num_bulk_out] = endpoint; ++num_bulk_out; } if ((endpoint->bEndpointAddress & 0x80) && ((endpoint->bmAttributes & 3) == 0x03)) { /* we found a interrupt in endpoint */ dbg("found interrupt in"); interrupt_pipe = HAS; interrupt_in_endpoint[num_interrupt_in] = endpoint; ++num_interrupt_in; } } /* verify that we found all of the endpoints that we need */ if (!((interrupt_pipe & type->needs_interrupt_in) && (bulk_in_pipe & type->needs_bulk_in) && (bulk_out_pipe & type->needs_bulk_out))) { /* nope, they don't match what we expected */ info("descriptors matched, but endpoints did not"); return NULL; } /* found all that we need */ MOD_INC_USE_COUNT; info("%s converter detected", type->name); #ifdef CONFIG_USB_SERIAL_GENERIC if (type == &generic_device) { num_ports = num_bulk_out; if (num_ports == 0) { err("Generic device with no bulk out, not allowed."); MOD_DEC_USE_COUNT; return NULL; } } else #endif num_ports = type->num_ports; serial = get_free_serial (num_ports, &minor); if (serial == NULL) { err("No more free serial devices"); MOD_DEC_USE_COUNT; return NULL; } serial->dev = dev; serial->type = type; serial->minor = minor; serial->num_ports = num_ports; serial->num_bulk_in = num_bulk_in; serial->num_bulk_out = num_bulk_out; serial->num_interrupt_in = num_interrupt_in; /* if this device type has a startup function, call it */ if (type->startup) { if (type->startup (serial)) { goto probe_error; } } /* set up the endpoint information */ for (i = 0; i < num_bulk_in; ++i) { endpoint = bulk_in_endpoint[i]; port = &serial->port[i]; port->read_urb = usb_alloc_urb (0); if (!port->read_urb) { err("No free urbs available"); goto probe_error; } buffer_size = endpoint->wMaxPacketSize; port->bulk_in_buffer = kmalloc (buffer_size, GFP_KERNEL); if (!port->bulk_in_buffer) { err("Couldn't allocate bulk_in_buffer"); goto probe_error; } FILL_BULK_URB(port->read_urb, dev, usb_rcvbulkpipe(dev, endpoint->bEndpointAddress), port->bulk_in_buffer, buffer_size, ((serial->type->read_bulk_callback) ? serial->type->read_bulk_callback : generic_read_bulk_callback), port); } for (i = 0; i < num_bulk_out; ++i) { endpoint = bulk_out_endpoint[i]; port = &serial->port[i]; port->write_urb = usb_alloc_urb(0); if (!port->write_urb) { err("No free urbs available"); goto probe_error; } buffer_size = endpoint->wMaxPacketSize; port->bulk_out_size = buffer_size; port->bulk_out_buffer = kmalloc (buffer_size, GFP_KERNEL); if (!port->bulk_out_buffer) { err("Couldn't allocate bulk_out_buffer"); goto probe_error; } FILL_BULK_URB(port->write_urb, dev, usb_sndbulkpipe(dev, endpoint->bEndpointAddress), port->bulk_out_buffer, buffer_size, ((serial->type->write_bulk_callback) ? serial->type->write_bulk_callback : generic_write_bulk_callback), port); } for (i = 0; i < num_interrupt_in; ++i) { endpoint = interrupt_in_endpoint[i]; port = &serial->port[i]; port->interrupt_in_urb = usb_alloc_urb(0); if (!port->interrupt_in_urb) { err("No free urbs available"); goto probe_error; } buffer_size = endpoint->wMaxPacketSize; port->interrupt_in_buffer = kmalloc (buffer_size, GFP_KERNEL); if (!port->interrupt_in_buffer) { err("Couldn't allocate interrupt_in_buffer"); goto probe_error; } FILL_INT_URB(port->interrupt_in_urb, dev, usb_rcvintpipe(dev, endpoint->bEndpointAddress), port->interrupt_in_buffer, buffer_size, serial->type->read_int_callback, port, endpoint->bInterval); } /* initialize some parts of the port structures */ /* we don't use num_ports here cauz some devices have more endpoint pairs than ports */ max_endpoints = MAX(num_bulk_in, num_bulk_out); max_endpoints = MAX(max_endpoints, num_interrupt_in); for (i = 0; i < max_endpoints; ++i) { port = &serial->port[i]; port->number = i + serial->minor; port->serial = serial; port->magic = USB_SERIAL_PORT_MAGIC; port->tqueue.routine = port_softint; port->tqueue.data = port; } /* initialize the devfs nodes for this device and let the user know what ports we are bound to */ for (i = 0; i < serial->num_ports; ++i) { tty_register_devfs (&serial_tty_driver, 0, serial->port[i].number); info("%s converter now attached to ttyUSB%d (or usb/tts/%d for devfs)", type->name, serial->port[i].number, serial->port[i].number); } return serial; /* success */ probe_error: for (i = 0; i < num_bulk_in; ++i) { port = &serial->port[i]; if (port->read_urb) usb_free_urb (port->read_urb); if (port->bulk_in_buffer) kfree (port->bulk_in_buffer); } for (i = 0; i < num_bulk_out; ++i) { port = &serial->port[i]; if (port->write_urb) usb_free_urb (port->write_urb); if (port->bulk_out_buffer) kfree (port->bulk_out_buffer); } for (i = 0; i < num_interrupt_in; ++i) { port = &serial->port[i]; if (port->interrupt_in_urb) usb_free_urb (port->interrupt_in_urb); if (port->interrupt_in_buffer) kfree (port->interrupt_in_buffer); } /* return the minor range that this device had */ return_serial (serial); /* free up any memory that we allocated */ kfree (serial); MOD_DEC_USE_COUNT; return NULL; } static void usb_serial_disconnect(struct usb_device *dev, void *ptr) { struct usb_serial *serial = (struct usb_serial *) ptr; struct usb_serial_port *port; int i; if (serial) { if (serial->type->shutdown) serial->type->shutdown(serial); for (i = 0; i < serial->num_ports; ++i) serial->port[i].active = 0; for (i = 0; i < serial->num_bulk_in; ++i) { port = &serial->port[i]; if (port->read_urb) { usb_unlink_urb (port->read_urb); usb_free_urb (port->read_urb); } if (port->bulk_in_buffer) kfree (port->bulk_in_buffer); } for (i = 0; i < serial->num_bulk_out; ++i) { port = &serial->port[i]; if (port->write_urb) { usb_unlink_urb (port->write_urb); usb_free_urb (port->write_urb); } if (port->bulk_out_buffer) kfree (port->bulk_out_buffer); } for (i = 0; i < serial->num_interrupt_in; ++i) { port = &serial->port[i]; if (port->interrupt_in_urb) { usb_unlink_urb (port->interrupt_in_urb); usb_free_urb (port->interrupt_in_urb); } if (port->interrupt_in_buffer) kfree (port->interrupt_in_buffer); } for (i = 0; i < serial->num_ports; ++i) { tty_unregister_devfs (&serial_tty_driver, serial->port[i].number); info("%s converter now disconnected from ttyUSB%d", serial->type->name, serial->port[i].number); } /* return the minor range that this device had */ return_serial (serial); /* free up any memory that we allocated */ kfree (serial); } else { info("device disconnected"); } MOD_DEC_USE_COUNT; } static struct tty_driver serial_tty_driver = { magic: TTY_DRIVER_MAGIC, driver_name: "usb-serial", name: "usb/tts/%d", major: SERIAL_TTY_MAJOR, minor_start: 0, num: SERIAL_TTY_MINORS, type: TTY_DRIVER_TYPE_SERIAL, subtype: SERIAL_TYPE_NORMAL, flags: TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS, refcount: &serial_refcount, table: serial_tty, termios: serial_termios, termios_locked: serial_termios_locked, open: serial_open, close: serial_close, write: serial_write, write_room: serial_write_room, ioctl: serial_ioctl, set_termios: serial_set_termios, throttle: serial_throttle, unthrottle: serial_unthrottle, break_ctl: serial_break, chars_in_buffer: serial_chars_in_buffer, }; int usb_serial_init(void) { int i; int something; int result; /* Initalize our global data */ for (i = 0; i < SERIAL_TTY_MINORS; ++i) { serial_table[i] = NULL; } /* tell the world what devices this driver currently supports */ something = 0; for (i = 0; usb_serial_devices[i]; ++i) { if (!strstr (usb_serial_devices[i]->name, "prerenumeration")) { info ("USB Serial support registered for %s", usb_serial_devices[i]->name); something = 1; } } if (!something) info ("USB Serial driver is not configured for any devices!"); /* register the tty driver */ serial_tty_driver.init_termios = tty_std_termios; serial_tty_driver.init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; if (tty_register_driver (&serial_tty_driver)) { err(__FUNCTION__ " - failed to register tty driver"); return -1; } /* register the USB driver */ result = usb_register(&usb_serial_driver); if (result < 0) { tty_unregister_driver(&serial_tty_driver); err("usb_register failed for the usb-serial driver. Error number %d", result); return -1; } return 0; } void usb_serial_exit(void) { usb_deregister(&usb_serial_driver); tty_unregister_driver(&serial_tty_driver); } module_init(usb_serial_init); module_exit(usb_serial_exit);