diff options
Diffstat (limited to 'drivers/usb/serial/usb-serial.c')
| -rw-r--r-- | drivers/usb/serial/usb-serial.c | 1435 |
1 files changed, 1435 insertions, 0 deletions
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c new file mode 100644 index 000000000000..4536f63faaea --- /dev/null +++ b/drivers/usb/serial/usb-serial.c @@ -0,0 +1,1435 @@ +/* + * USB Serial Converter driver + * + * Copyright (C) 1999 - 2004 Greg Kroah-Hartman (greg@kroah.com) + * Copyright (C) 2000 Peter Berger (pberger@brimson.com) + * Copyright (C) 2000 Al Borchers (borchers@steinerpoint.com) + * + * 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. + * + * 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 + * + * (12/10/2002) gkh + * Split the ports off into their own struct device, and added a + * usb-serial bus driver. + * + * (11/19/2002) gkh + * removed a few #ifdefs for the generic code and cleaned up the failure + * logic in initialization. + * + * (10/02/2002) gkh + * moved the console code to console.c and out of this file. + * + * (06/05/2002) gkh + * moved location of startup() call in serial_probe() until after all + * of the port information and endpoints are initialized. This makes + * things easier for some drivers. + * + * (04/10/2002) gkh + * added serial_read_proc function which creates a + * /proc/tty/driver/usb-serial file. + * + * (03/27/2002) gkh + * Got USB serial console code working properly and merged into the main + * version of the tree. Thanks to Randy Dunlap for the initial version + * of this code, and for pushing me to finish it up. + * The USB serial console works with any usb serial driver device. + * + * (03/21/2002) gkh + * Moved all manipulation of port->open_count into the core. Now the + * individual driver's open and close functions are called only when the + * first open() and last close() is called. Making the drivers a bit + * smaller and simpler. + * Fixed a bug if a driver didn't have the owner field set. + * + * (02/26/2002) gkh + * Moved all locking into the main serial_* functions, instead of having + * the individual drivers have to grab the port semaphore. This should + * reduce races. + * Reworked the MOD_INC logic a bit to always increment and decrement, even + * if the generic driver is being used. + * + * (10/10/2001) gkh + * usb_serial_disconnect() now sets the serial->dev pointer is to NULL to + * help prevent child drivers from accessing the device since it is now + * gone. + * + * (09/13/2001) gkh + * Moved generic driver initialize after we have registered with the USB + * core. Thanks to Randy Dunlap for pointing this problem out. + * + * (07/03/2001) gkh + * Fixed module paramater size. Thanks to John Brockmeyer for the pointer. + * Fixed vendor and product getting defined through the MODULE_PARM macro + * if the Generic driver wasn't compiled in. + * Fixed problem with generic_shutdown() not being called for drivers that + * don't have a shutdown() function. + * + * (06/06/2001) gkh + * added evil hack that is needed for the prolific pl2303 device due to the + * crazy way its endpoints are set up. + * + * (05/30/2001) gkh + * switched from using spinlock to a semaphore, which fixes lots of problems. + * + * (04/08/2001) gb + * Identify version on module load. + * + * 2001_02_05 gkh + * Fixed buffer overflows bug with the generic serial driver. Thanks to + * Todd Squires <squirest@ct0.com> for fixing this. + * + * (01/10/2001) gkh + * Fixed bug where the generic serial adaptor grabbed _any_ device that was + * offered to it. + * + * (12/12/2000) gkh + * Removed MOD_INC and MOD_DEC from poll and disconnect functions, and + * moved them to the serial_open and serial_close functions. + * Also fixed bug with there not being a MOD_DEC for the generic driver + * (thanks to Gary Brubaker for finding this.) + * + * (11/29/2000) gkh + * Small NULL pointer initialization cleanup which saves a bit of disk image + * + * (11/01/2000) Adam J. Richter + * instead of using idVendor/idProduct pairs, usb serial drivers + * now identify their hardware interest with usb_device_id tables, + * which they usually have anyhow for use with MODULE_DEVICE_TABLE. + * + * (10/05/2000) gkh + * Fixed bug with urb->dev not being set properly, now that the usb + * core needs it. + * + * (09/11/2000) gkh + * Removed DEBUG #ifdefs with call to usb_serial_debug_data + * + * (08/28/2000) gkh + * Added port_lock to port structure. + * Added locks for SMP safeness to generic driver + * Fixed the ability to open a generic device's port more than once. + * + * (07/23/2000) gkh + * Added bulk_out_endpointAddress to port structure. + * + * (07/19/2000) gkh, pberger, and borchers + * Modifications to allow usb-serial drivers to be modules. + * + * (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 <warner@lothar.com> + * 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 separate + * 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 continuous 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 <linux/config.h> +#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/module.h> +#include <linux/moduleparam.h> +#include <linux/spinlock.h> +#include <linux/list.h> +#include <linux/smp_lock.h> +#include <asm/uaccess.h> +#include <linux/usb.h> +#include "usb-serial.h" +#include "pl2303.h" + +/* + * Version Information + */ +#define DRIVER_VERSION "v2.0" +#define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com, http://www.kroah.com/linux/" +#define DRIVER_DESC "USB Serial Driver core" + +/* Driver structure we register with the USB core */ +static struct usb_driver usb_serial_driver = { + .owner = THIS_MODULE, + .name = "usbserial", + .probe = usb_serial_probe, + .disconnect = usb_serial_disconnect, +}; + +/* There is no MODULE_DEVICE_TABLE for usbserial.c. Instead + the MODULE_DEVICE_TABLE declarations in each serial driver + cause the "hotplug" program to pull in whatever module is necessary + via modprobe, and modprobe will load usbserial because the serial + drivers depend on it. +*/ + +static int debug; +static struct usb_serial *serial_table[SERIAL_TTY_MINORS]; /* initially all NULL */ +static LIST_HEAD(usb_serial_driver_list); + +struct usb_serial *usb_serial_get_by_index(unsigned index) +{ + struct usb_serial *serial = serial_table[index]; + + if (serial) + kref_get(&serial->kref); + return serial; +} + +static struct usb_serial *get_free_serial (struct usb_serial *serial, int num_ports, unsigned int *minor) +{ + unsigned int i, j; + int good_spot; + + dbg("%s %d", __FUNCTION__, 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 ((i+j >= SERIAL_TTY_MINORS) || (serial_table[i+j])) { + good_spot = 0; + i += j; + break; + } + if (good_spot == 0) + continue; + + *minor = i; + dbg("%s - minor base = %d", __FUNCTION__, *minor); + for (i = *minor; (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("%s", __FUNCTION__); + + if (serial == NULL) + return; + + for (i = 0; i < serial->num_ports; ++i) { + serial_table[serial->minor + i] = NULL; + } +} + +static void destroy_serial(struct kref *kref) +{ + struct usb_serial *serial; + struct usb_serial_port *port; + int i; + + serial = to_usb_serial(kref); + + dbg ("%s - %s", __FUNCTION__, serial->type->name); + + serial->type->shutdown(serial); + + /* return the minor range that this device had */ + return_serial(serial); + + for (i = 0; i < serial->num_ports; ++i) + serial->port[i]->open_count = 0; + + /* the ports are cleaned up and released in port_release() */ + for (i = 0; i < serial->num_ports; ++i) + if (serial->port[i]->dev.parent != NULL) { + device_unregister(&serial->port[i]->dev); + serial->port[i] = NULL; + } + + /* If this is a "fake" port, we have to clean it up here, as it will + * not get cleaned up in port_release() as it was never registered with + * the driver core */ + if (serial->num_ports < serial->num_port_pointers) { + for (i = serial->num_ports; i < serial->num_port_pointers; ++i) { + port = serial->port[i]; + if (!port) + continue; + usb_kill_urb(port->read_urb); + usb_free_urb(port->read_urb); + usb_kill_urb(port->write_urb); + usb_free_urb(port->write_urb); + usb_kill_urb(port->interrupt_in_urb); + usb_free_urb(port->interrupt_in_urb); + usb_kill_urb(port->interrupt_out_urb); + usb_free_urb(port->interrupt_out_urb); + kfree(port->bulk_in_buffer); + kfree(port->bulk_out_buffer); + kfree(port->interrupt_in_buffer); + kfree(port->interrupt_out_buffer); + } + } + + usb_put_dev(serial->dev); + + /* free up any memory that we allocated */ + kfree (serial); +} + +/***************************************************************************** + * Driver tty interface functions + *****************************************************************************/ +static int serial_open (struct tty_struct *tty, struct file * filp) +{ + struct usb_serial *serial; + struct usb_serial_port *port; + unsigned int portNumber; + int retval; + + dbg("%s", __FUNCTION__); + + /* get the serial object associated with this tty pointer */ + serial = usb_serial_get_by_index(tty->index); + if (!serial) { + tty->driver_data = NULL; + return -ENODEV; + } + + portNumber = tty->index - serial->minor; + port = serial->port[portNumber]; + + ++port->open_count; + + if (port->open_count == 1) { + + /* set up our port structure making the tty driver + * remember our port object, and us it */ + tty->driver_data = port; + port->tty = tty; + + /* lock this module before we call it + * this may fail, which means we must bail out, + * safe because we are called with BKL held */ + if (!try_module_get(serial->type->owner)) { + retval = -ENODEV; + goto bailout_kref_put; + } + + /* only call the device specific open if this + * is the first time the port is opened */ + retval = serial->type->open(port, filp); + if (retval) + goto bailout_module_put; + } + + return 0; + +bailout_module_put: + module_put(serial->type->owner); +bailout_kref_put: + kref_put(&serial->kref, destroy_serial); + port->open_count = 0; + return retval; +} + +static void serial_close(struct tty_struct *tty, struct file * filp) +{ + struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; + + if (!port) + return; + + dbg("%s - port %d", __FUNCTION__, port->number); + + if (port->open_count == 0) + return; + + --port->open_count; + if (port->open_count == 0) { + /* only call the device specific close if this + * port is being closed by the last owner */ + port->serial->type->close(port, filp); + + if (port->tty) { + if (port->tty->driver_data) + port->tty->driver_data = NULL; + port->tty = NULL; + } + + module_put(port->serial->type->owner); + } + + kref_put(&port->serial->kref, destroy_serial); +} + +static int serial_write (struct tty_struct * tty, const unsigned char *buf, int count) +{ + struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; + int retval = -EINVAL; + + dbg("%s - port %d, %d byte(s)", __FUNCTION__, port->number, count); + + if (!port->open_count) { + dbg("%s - port not opened", __FUNCTION__); + goto exit; + } + + /* pass on to the driver specific version of this function */ + retval = port->serial->type->write(port, buf, count); + +exit: + return retval; +} + +static int serial_write_room (struct tty_struct *tty) +{ + struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; + int retval = -EINVAL; + + dbg("%s - port %d", __FUNCTION__, port->number); + + if (!port->open_count) { + dbg("%s - port not open", __FUNCTION__); + goto exit; + } + + /* pass on to the driver specific version of this function */ + retval = port->serial->type->write_room(port); + +exit: + return retval; +} + +static int serial_chars_in_buffer (struct tty_struct *tty) +{ + struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; + int retval = -EINVAL; + + dbg("%s = port %d", __FUNCTION__, port->number); + + if (!port->open_count) { + dbg("%s - port not open", __FUNCTION__); + goto exit; + } + + /* pass on to the driver specific version of this function */ + retval = port->serial->type->chars_in_buffer(port); + +exit: + return retval; +} + +static void serial_throttle (struct tty_struct * tty) +{ + struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; + + dbg("%s - port %d", __FUNCTION__, port->number); + + if (!port->open_count) { + dbg ("%s - port not open", __FUNCTION__); + return; + } + + /* pass on to the driver specific version of this function */ + if (port->serial->type->throttle) + port->serial->type->throttle(port); +} + +static void serial_unthrottle (struct tty_struct * tty) +{ + struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; + + dbg("%s - port %d", __FUNCTION__, port->number); + + if (!port->open_count) { + dbg("%s - port not open", __FUNCTION__); + return; + } + + /* pass on to the driver specific version of this function */ + if (port->serial->type->unthrottle) + port->serial->type->unthrottle(port); +} + +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; + int retval = -ENODEV; + + dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd); + + if (!port->open_count) { + dbg ("%s - port not open", __FUNCTION__); + goto exit; + } + + /* pass on to the driver specific version of this function if it is available */ + if (port->serial->type->ioctl) + retval = port->serial->type->ioctl(port, file, cmd, arg); + else + retval = -ENOIOCTLCMD; + +exit: + return retval; +} + +static void serial_set_termios (struct tty_struct *tty, struct termios * old) +{ + struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; + + dbg("%s - port %d", __FUNCTION__, port->number); + + if (!port->open_count) { + dbg("%s - port not open", __FUNCTION__); + return; + } + + /* pass on to the driver specific version of this function if it is available */ + if (port->serial->type->set_termios) + port->serial->type->set_termios(port, old); +} + +static void serial_break (struct tty_struct *tty, int break_state) +{ + struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; + + dbg("%s - port %d", __FUNCTION__, port->number); + + if (!port->open_count) { + dbg("%s - port not open", __FUNCTION__); + return; + } + + /* pass on to the driver specific version of this function if it is available */ + if (port->serial->type->break_ctl) + port->serial->type->break_ctl(port, break_state); +} + +static int serial_read_proc (char *page, char **start, off_t off, int count, int *eof, void *data) +{ + struct usb_serial *serial; + int length = 0; + int i; + off_t begin = 0; + char tmp[40]; + + dbg("%s", __FUNCTION__); + length += sprintf (page, "usbserinfo:1.0 driver:%s\n", DRIVER_VERSION); + for (i = 0; i < SERIAL_TTY_MINORS && length < PAGE_SIZE; ++i) { + serial = usb_serial_get_by_index(i); + if (serial == NULL) + continue; + + length += sprintf (page+length, "%d:", i); + if (serial->type->owner) + length += sprintf (page+length, " module:%s", module_name(serial->type->owner)); + length += sprintf (page+length, " name:\"%s\"", serial->type->name); + length += sprintf (page+length, " vendor:%04x product:%04x", + le16_to_cpu(serial->dev->descriptor.idVendor), + le16_to_cpu(serial->dev->descriptor.idProduct)); + length += sprintf (page+length, " num_ports:%d", serial->num_ports); + length += sprintf (page+length, " port:%d", i - serial->minor + 1); + + usb_make_path(serial->dev, tmp, sizeof(tmp)); + length += sprintf (page+length, " path:%s", tmp); + + length += sprintf (page+length, "\n"); + if ((length + begin) > (off + count)) + goto done; + if ((length + begin) < off) { + begin += length; + length = 0; + } + kref_put(&serial->kref, destroy_serial); + } + *eof = 1; +done: + if (off >= (length + begin)) + return 0; + *start = page + (off-begin); + return ((count < begin+length-off) ? count : begin+length-off); +} + +static int serial_tiocmget (struct tty_struct *tty, struct file *file) +{ + struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; + + dbg("%s - port %d", __FUNCTION__, port->number); + + if (!port->open_count) { + dbg("%s - port not open", __FUNCTION__); + goto exit; + } + + if (port->serial->type->tiocmget) + return port->serial->type->tiocmget(port, file); + +exit: + return -EINVAL; +} + +static int serial_tiocmset (struct tty_struct *tty, struct file *file, + unsigned int set, unsigned int clear) +{ + struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; + + dbg("%s - port %d", __FUNCTION__, port->number); + + if (!port->open_count) { + dbg("%s - port not open", __FUNCTION__); + goto exit; + } + + if (port->serial->type->tiocmset) + return port->serial->type->tiocmset(port, file, set, clear); + +exit: + return -EINVAL; +} + +void usb_serial_port_softint(void *private) +{ + struct usb_serial_port *port = (struct usb_serial_port *)private; + struct tty_struct *tty; + + dbg("%s - port %d", __FUNCTION__, port->number); + + if (!port) + return; + + tty = port->tty; + if (!tty) + return; + + tty_wakeup(tty); +} + +static void port_release(struct device *dev) +{ + struct usb_serial_port *port = to_usb_serial_port(dev); + + dbg ("%s - %s", __FUNCTION__, dev->bus_id); + usb_kill_urb(port->read_urb); + usb_free_urb(port->read_urb); + usb_kill_urb(port->write_urb); + usb_free_urb(port->write_urb); + usb_kill_urb(port->interrupt_in_urb); + usb_free_urb(port->interrupt_in_urb); + usb_kill_urb(port->interrupt_out_urb); + usb_free_urb(port->interrupt_out_urb); + kfree(port->bulk_in_buffer); + kfree(port->bulk_out_buffer); + kfree(port->interrupt_in_buffer); + kfree(port->interrupt_out_buffer); + kfree(port); +} + +static struct usb_serial * create_serial (struct usb_device *dev, + struct usb_interface *interface, + struct usb_serial_device_type *type) +{ + struct usb_serial *serial; + + serial = kmalloc (sizeof (*serial), GFP_KERNEL); + if (!serial) { + dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__); + return NULL; + } + memset (serial, 0, sizeof(*serial)); + serial->dev = usb_get_dev(dev); + serial->type = type; + serial->interface = interface; + kref_init(&serial->kref); + + return serial; +} + +static struct usb_serial_device_type *search_serial_device(struct usb_interface *iface) +{ + struct list_head *p; + const struct usb_device_id *id; + struct usb_serial_device_type *t; + + /* List trough know devices and see if the usb id matches */ + list_for_each(p, &usb_serial_driver_list) { + t = list_entry(p, struct usb_serial_device_type, driver_list); + id = usb_match_id(iface, t->id_table); + if (id != NULL) { + dbg("descriptor matches"); + return t; + } + } + + return NULL; +} + +int usb_serial_probe(struct usb_interface *interface, + const struct usb_device_id *id) +{ + struct usb_device *dev = interface_to_usbdev (interface); + struct usb_serial *serial = NULL; + struct usb_serial_port *port; + struct usb_host_interface *iface_desc; + struct usb_endpoint_descriptor *endpoint; + struct usb_endpoint_descriptor *interrupt_in_endpoint[MAX_NUM_PORTS]; + struct usb_endpoint_descriptor *interrupt_out_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 = NULL; + int retval; + int minor; + int buffer_size; + int i; + int num_interrupt_in = 0; + int num_interrupt_out = 0; + int num_bulk_in = 0; + int num_bulk_out = 0; + int num_ports = 0; + int max_endpoints; + + type = search_serial_device(interface); + if (!type) { + dbg("none matched"); + return -ENODEV; + } + + serial = create_serial (dev, interface, type); + if (!serial) { + dev_err(&interface->dev, "%s - out of memory\n", __FUNCTION__); + return -ENOMEM; + } + + /* if this device type has a probe function, call it */ + if (type->probe) { + const struct usb_device_id *id; + + if (!try_module_get(type->owner)) { + dev_err(&interface->dev, "module get failed, exiting\n"); + kfree (serial); + return -EIO; + } + + id = usb_match_id(interface, type->id_table); + retval = type->probe(serial, id); + module_put(type->owner); + + if (retval) { + dbg ("sub driver rejected device"); + kfree (serial); + return retval; + } + } + + /* descriptor matches, let's find the endpoints needed */ + /* check out the endpoints */ + iface_desc = interface->cur_altsetting; + for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { + endpoint = &iface_desc->endpoint[i].desc; + + if ((endpoint->bEndpointAddress & 0x80) && + ((endpoint->bmAttributes & 3) == 0x02)) { + /* we found a bulk in endpoint */ + dbg("found bulk in on endpoint %d", i); + 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 on endpoint %d", i); + 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 on endpoint %d", i); + interrupt_in_endpoint[num_interrupt_in] = endpoint; + ++num_interrupt_in; + } + + if (((endpoint->bEndpointAddress & 0x80) == 0x00) && + ((endpoint->bmAttributes & 3) == 0x03)) { + /* we found an interrupt out endpoint */ + dbg("found interrupt out on endpoint %d", i); + interrupt_out_endpoint[num_interrupt_out] = endpoint; + ++num_interrupt_out; + } + } + +#if defined(CONFIG_USB_SERIAL_PL2303) || defined(CONFIG_USB_SERIAL_PL2303_MODULE) + /* BEGIN HORRIBLE HACK FOR PL2303 */ + /* this is needed due to the looney way its endpoints are set up */ + if (((le16_to_cpu(dev->descriptor.idVendor) == PL2303_VENDOR_ID) && + (le16_to_cpu(dev->descriptor.idProduct) == PL2303_PRODUCT_ID)) || + ((le16_to_cpu(dev->descriptor.idVendor) == ATEN_VENDOR_ID) && + (le16_to_cpu(dev->descriptor.idProduct) == ATEN_PRODUCT_ID))) { + if (interface != dev->actconfig->interface[0]) { + /* check out the endpoints of the other interface*/ + iface_desc = dev->actconfig->interface[0]->cur_altsetting; + for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { + endpoint = &iface_desc->endpoint[i].desc; + if ((endpoint->bEndpointAddress & 0x80) && + ((endpoint->bmAttributes & 3) == 0x03)) { + /* we found a interrupt in endpoint */ + dbg("found interrupt in for Prolific device on separate interface"); + interrupt_in_endpoint[num_interrupt_in] = endpoint; + ++num_interrupt_in; + } + } + } + + /* Now make sure the PL-2303 is configured correctly. + * If not, give up now and hope this hack will work + * properly during a later invocation of usb_serial_probe + */ + if (num_bulk_in == 0 || num_bulk_out == 0) { + dev_info(&interface->dev, "PL-2303 hack: descriptors matched but endpoints did not\n"); + kfree (serial); + return -ENODEV; + } + } + /* END HORRIBLE HACK FOR PL2303 */ +#endif + + /* found all that we need */ + dev_info(&interface->dev, "%s converter detected\n", type->name); + +#ifdef CONFIG_USB_SERIAL_GENERIC + if (type == &usb_serial_generic_device) { + num_ports = num_bulk_out; + if (num_ports == 0) { + dev_err(&interface->dev, "Generic device with no bulk out, not allowed.\n"); + kfree (serial); + return -EIO; + } + } +#endif + if (!num_ports) { + /* if this device type has a calc_num_ports function, call it */ + if (type->calc_num_ports) { + if (!try_module_get(type->owner)) { + dev_err(&interface->dev, "module get failed, exiting\n"); + kfree (serial); + return -EIO; + } + num_ports = type->calc_num_ports (serial); + module_put(type->owner); + } + if (!num_ports) + num_ports = type->num_ports; + } + + if (get_free_serial (serial, num_ports, &minor) == NULL) { + dev_err(&interface->dev, "No more free serial devices\n"); + kfree (serial); + return -ENOMEM; + } + + 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; + serial->num_interrupt_out = num_interrupt_out; + + /* create our ports, we need as many as the max endpoints */ + /* 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); + max_endpoints = max(max_endpoints, num_interrupt_out); + max_endpoints = max(max_endpoints, (int)serial->num_ports); + serial->num_port_pointers = max_endpoints; + dbg("%s - setting up %d port structures for this device", __FUNCTION__, max_endpoints); + for (i = 0; i < max_endpoints; ++i) { + port = kmalloc(sizeof(struct usb_serial_port), GFP_KERNEL); + if (!port) + goto probe_error; + memset(port, 0x00, sizeof(struct usb_serial_port)); + port->number = i + serial->minor; + port->serial = serial; + INIT_WORK(&port->work, usb_serial_port_softint, port); + serial->port[i] = port; + } + + /* 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, GFP_KERNEL); + if (!port->read_urb) { + dev_err(&interface->dev, "No free urbs available\n"); + goto probe_error; + } + buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); + port->bulk_in_size = buffer_size; + port->bulk_in_endpointAddress = endpoint->bEndpointAddress; + port->bulk_in_buffer = kmalloc (buffer_size, GFP_KERNEL); + if (!port->bulk_in_buffer) { + dev_err(&interface->dev, "Couldn't allocate bulk_in_buffer\n"); + goto probe_error; + } + usb_fill_bulk_urb (port->read_urb, dev, + usb_rcvbulkpipe (dev, + endpoint->bEndpointAddress), + port->bulk_in_buffer, buffer_size, + serial->type->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, GFP_KERNEL); + if (!port->write_urb) { + dev_err(&interface->dev, "No free urbs available\n"); + goto probe_error; + } + buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); + port->bulk_out_size = buffer_size; + port->bulk_out_endpointAddress = endpoint->bEndpointAddress; + port->bulk_out_buffer = kmalloc (buffer_size, GFP_KERNEL); + if (!port->bulk_out_buffer) { + dev_err(&interface->dev, "Couldn't allocate bulk_out_buffer\n"); + goto probe_error; + } + usb_fill_bulk_urb (port->write_urb, dev, + usb_sndbulkpipe (dev, + endpoint->bEndpointAddress), + port->bulk_out_buffer, buffer_size, + serial->type->write_bulk_callback, + port); + } + + if (serial->type->read_int_callback) { + 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, GFP_KERNEL); + if (!port->interrupt_in_urb) { + dev_err(&interface->dev, "No free urbs available\n"); + goto probe_error; + } + buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); + port->interrupt_in_endpointAddress = endpoint->bEndpointAddress; + port->interrupt_in_buffer = kmalloc (buffer_size, GFP_KERNEL); + if (!port->interrupt_in_buffer) { + dev_err(&interface->dev, "Couldn't allocate interrupt_in_buffer\n"); + goto probe_error; + } + usb_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); + } + } else if (num_interrupt_in) { + dbg("the device claims to support interrupt in transfers, but read_int_callback is not defined"); + } + + if (serial->type->write_int_callback) { + for (i = 0; i < num_interrupt_out; ++i) { + endpoint = interrupt_out_endpoint[i]; + port = serial->port[i]; + port->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL); + if (!port->interrupt_out_urb) { + dev_err(&interface->dev, "No free urbs available\n"); + goto probe_error; + } + buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); + port->interrupt_out_size = buffer_size; + port->interrupt_out_endpointAddress = endpoint->bEndpointAddress; + port->interrupt_out_buffer = kmalloc (buffer_size, GFP_KERNEL); + if (!port->interrupt_out_buffer) { + dev_err(&interface->dev, "Couldn't allocate interrupt_out_buffer\n"); + goto probe_error; + } + usb_fill_int_urb (port->interrupt_out_urb, dev, + usb_sndintpipe (dev, + endpoint->bEndpointAddress), + port->interrupt_out_buffer, buffer_size, + serial->type->write_int_callback, port, + endpoint->bInterval); + } + } else if (num_interrupt_out) { + dbg("the device claims to support interrupt out transfers, but write_int_callback is not defined"); + } + + /* if this device type has an attach function, call it */ + if (type->attach) { + if (!try_module_get(type->owner)) { + dev_err(&interface->dev, "module get failed, exiting\n"); + goto probe_error; + } + retval = type->attach (serial); + module_put(type->owner); + if (retval < 0) + goto probe_error; + if (retval > 0) { + /* quietly accept this device, but don't bind to a serial port + * as it's about to disappear */ + goto exit; + } + } + + /* register all of the individual ports with the driver core */ + for (i = 0; i < num_ports; ++i) { + port = serial->port[i]; + port->dev.parent = &interface->dev; + port->dev.driver = NULL; + port->dev.bus = &usb_serial_bus_type; + port->dev.release = &port_release; + + snprintf (&port->dev.bus_id[0], sizeof(port->dev.bus_id), "ttyUSB%d", port->number); + dbg ("%s - registering %s", __FUNCTION__, port->dev.bus_id); + device_register (&port->dev); + } + + usb_serial_console_init (debug, minor); + +exit: + /* success */ + usb_set_intfdata (interface, serial); + return 0; + +probe_error: + for (i = 0; i < num_bulk_in; ++i) { + port = serial->port[i]; + if (!port) + continue; + if (port->read_urb) + usb_free_urb (port->read_urb); + kfree(port->bulk_in_buffer); + } + for (i = 0; i < num_bulk_out; ++i) { + port = serial->port[i]; + if (!port) + continue; + if (port->write_urb) + usb_free_urb (port->write_urb); + kfree(port->bulk_out_buffer); + } + for (i = 0; i < num_interrupt_in; ++i) { + port = serial->port[i]; + if (!port) + continue; + if (port->interrupt_in_urb) + usb_free_urb (port->interrupt_in_urb); + kfree(port->interrupt_in_buffer); + } + for (i = 0; i < num_interrupt_out; ++i) { + port = serial->port[i]; + if (!port) + continue; + if (port->interrupt_out_urb) + usb_free_urb (port->interrupt_out_urb); + kfree(port->interrupt_out_buffer); + } + + /* return the minor range that this device had */ + return_serial (serial); + + /* free up any memory that we allocated */ + for (i = 0; i < serial->num_port_pointers; ++i) + kfree(serial->port[i]); + kfree (serial); + return -EIO; +} + +void usb_serial_disconnect(struct usb_interface *interface) +{ + int i; + struct usb_serial *serial = usb_get_intfdata (interface); + struct device *dev = &interface->dev; + struct usb_serial_port *port; + + dbg ("%s", __FUNCTION__); + + usb_set_intfdata (interface, NULL); + if (serial) { + for (i = 0; i < serial->num_ports; ++i) { + port = serial->port[i]; + if (port && port->tty) + tty_hangup(port->tty); + } + /* let the last holder of this object + * cause it to be cleaned up */ + kref_put(&serial->kref, destroy_serial); + } + dev_info(dev, "device disconnected\n"); +} + +static struct tty_operations serial_ops = { + .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, + .read_proc = serial_read_proc, + .tiocmget = serial_tiocmget, + .tiocmset = serial_tiocmset, +}; + +struct tty_driver *usb_serial_tty_driver; + +static int __init usb_serial_init(void) +{ + int i; + int result; + + usb_serial_tty_driver = alloc_tty_driver(SERIAL_TTY_MINORS); + if (!usb_serial_tty_driver) + return -ENOMEM; + + /* Initialize our global data */ + for (i = 0; i < SERIAL_TTY_MINORS; ++i) { + serial_table[i] = NULL; + } + + result = bus_register(&usb_serial_bus_type); + if (result) { + err("%s - registering bus driver failed", __FUNCTION__); + goto exit_bus; + } + + /* register the generic driver, if we should */ + result = usb_serial_generic_register(debug); + if (result < 0) { + err("%s - registering generic driver failed", __FUNCTION__); + goto exit_generic; + } + + usb_serial_tty_driver->owner = THIS_MODULE; + usb_serial_tty_driver->driver_name = "usbserial"; + usb_serial_tty_driver->devfs_name = "usb/tts/"; + usb_serial_tty_driver->name = "ttyUSB"; + usb_serial_tty_driver->major = SERIAL_TTY_MAJOR; + usb_serial_tty_driver->minor_start = 0; + usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; + usb_serial_tty_driver->subtype = SERIAL_TYPE_NORMAL; + usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS; + usb_serial_tty_driver->init_termios = tty_std_termios; + usb_serial_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; + tty_set_operations(usb_serial_tty_driver, &serial_ops); + result = tty_register_driver(usb_serial_tty_driver); + if (result) { + err("%s - tty_register_driver failed", __FUNCTION__); + goto exit_reg_driver; + } + + /* register the USB driver */ + result = usb_register(&usb_serial_driver); + if (result < 0) { + err("%s - usb_register failed", __FUNCTION__); + goto exit_tty; + } + + info(DRIVER_DESC " " DRIVER_VERSION); + + return result; + +exit_tty: + tty_unregister_driver(usb_serial_tty_driver); + +exit_reg_driver: + usb_serial_generic_deregister(); + +exit_generic: + bus_unregister(&usb_serial_bus_type); + +exit_bus: + err ("%s - returning with error %d", __FUNCTION__, result); + put_tty_driver(usb_serial_tty_driver); + return result; +} + + +static void __exit usb_serial_exit(void) +{ + usb_serial_console_exit(); + + usb_serial_generic_deregister(); + + usb_deregister(&usb_serial_driver); + tty_unregister_driver(usb_serial_tty_driver); + put_tty_driver(usb_serial_tty_driver); + bus_unregister(&usb_serial_bus_type); +} + + +module_init(usb_serial_init); +module_exit(usb_serial_exit); + +#define set_to_generic_if_null(type, function) \ + do { \ + if (!type->function) { \ + type->function = usb_serial_generic_##function; \ + dbg("Had to override the " #function \ + " usb serial operation with the generic one.");\ + } \ + } while (0) + +static void fixup_generic(struct usb_serial_device_type *device) +{ + set_to_generic_if_null(device, open); + set_to_generic_if_null(device, write); + set_to_generic_if_null(device, close); + set_to_generic_if_null(device, write_room); + set_to_generic_if_null(device, chars_in_buffer); + set_to_generic_if_null(device, read_bulk_callback); + set_to_generic_if_null(device, write_bulk_callback); + set_to_generic_if_null(device, shutdown); +} + +int usb_serial_register(struct usb_serial_device_type *new_device) +{ + int retval; + + fixup_generic(new_device); + + /* Add this device to our list of devices */ + list_add(&new_device->driver_list, &usb_serial_driver_list); + + retval = usb_serial_bus_register(new_device); + if (retval) { + err("problem %d when registering driver %s", retval, new_device->name); + list_del(&new_device->driver_list); + } + else + info("USB Serial support registered for %s", new_device->name); + + return retval; +} + + +void usb_serial_deregister(struct usb_serial_device_type *device) +{ + info("USB Serial deregistering driver %s", device->name); + list_del(&device->driver_list); + usb_serial_bus_deregister(device); +} + + + +/* If the usb-serial core is built into the core, the usb-serial drivers + need these symbols to load properly as modules. */ +EXPORT_SYMBOL_GPL(usb_serial_register); +EXPORT_SYMBOL_GPL(usb_serial_deregister); +EXPORT_SYMBOL_GPL(usb_serial_probe); +EXPORT_SYMBOL_GPL(usb_serial_disconnect); +EXPORT_SYMBOL_GPL(usb_serial_port_softint); + + +/* Module information */ +MODULE_AUTHOR( DRIVER_AUTHOR ); +MODULE_DESCRIPTION( DRIVER_DESC ); +MODULE_VERSION( DRIVER_VERSION ); +MODULE_LICENSE("GPL"); + +module_param(debug, bool, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(debug, "Debug enabled or not"); 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