| /* |
| * USB Serial Converter driver |
| * |
| * Copyright (C) 1999 - 2005 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 |
| * |
| */ |
| |
| #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/mutex.h> |
| #include <linux/list.h> |
| #include <asm/uaccess.h> |
| #include <linux/usb.h> |
| #include <linux/usb/serial.h> |
| #include "pl2303.h" |
| |
| /* |
| * Version Information |
| */ |
| #define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com, http://www.kroah.com/linux/" |
| #define DRIVER_DESC "USB Serial Driver core" |
| |
| static void port_free(struct usb_serial_port *port); |
| |
| /* Driver structure we register with the USB core */ |
| static struct usb_driver usb_serial_driver = { |
| .name = "usbserial", |
| .probe = usb_serial_probe, |
| .disconnect = usb_serial_disconnect, |
| .suspend = usb_serial_suspend, |
| .resume = usb_serial_resume, |
| .no_dynamic_id = 1, |
| }; |
| |
| /* 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 DEFINE_MUTEX(table_lock); |
| static LIST_HEAD(usb_serial_driver_list); |
| |
| struct usb_serial *usb_serial_get_by_index(unsigned index) |
| { |
| struct usb_serial *serial; |
| |
| mutex_lock(&table_lock); |
| serial = serial_table[index]; |
| |
| if (serial) |
| kref_get(&serial->kref); |
| mutex_unlock(&table_lock); |
| 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; |
| mutex_lock(&table_lock); |
| 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; |
| j = 0; |
| dbg("%s - minor base = %d", __FUNCTION__, *minor); |
| for (i = *minor; (i < (*minor + num_ports)) && (i < SERIAL_TTY_MINORS); ++i) { |
| serial_table[i] = serial; |
| serial->port[j++]->number = i; |
| } |
| mutex_unlock(&table_lock); |
| return serial; |
| } |
| mutex_unlock(&table_lock); |
| 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->description); |
| |
| 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; |
| port_free(port); |
| } |
| } |
| |
| usb_put_dev(serial->dev); |
| |
| /* free up any memory that we allocated */ |
| kfree (serial); |
| } |
| |
| void usb_serial_put(struct usb_serial *serial) |
| { |
| mutex_lock(&table_lock); |
| kref_put(&serial->kref, destroy_serial); |
| mutex_unlock(&table_lock); |
| } |
| |
| /***************************************************************************** |
| * 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]; |
| if (!port) { |
| retval = -ENODEV; |
| goto bailout_kref_put; |
| } |
| |
| if (mutex_lock_interruptible(&port->mutex)) { |
| retval = -ERESTARTSYS; |
| goto bailout_kref_put; |
| } |
| |
| ++port->open_count; |
| |
| /* set up our port structure making the tty driver |
| * remember our port object, and us it */ |
| tty->driver_data = port; |
| port->tty = tty; |
| |
| if (port->open_count == 1) { |
| |
| /* 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->driver.owner)) { |
| retval = -ENODEV; |
| goto bailout_mutex_unlock; |
| } |
| |
| retval = usb_autopm_get_interface(serial->interface); |
| if (retval) |
| goto bailout_module_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_interface_put; |
| } |
| |
| mutex_unlock(&port->mutex); |
| return 0; |
| |
| bailout_interface_put: |
| usb_autopm_put_interface(serial->interface); |
| bailout_module_put: |
| module_put(serial->type->driver.owner); |
| bailout_mutex_unlock: |
| port->open_count = 0; |
| tty->driver_data = NULL; |
| port->tty = NULL; |
| mutex_unlock(&port->mutex); |
| bailout_kref_put: |
| usb_serial_put(serial); |
| return retval; |
| } |
| |
| static void serial_close(struct tty_struct *tty, struct file * filp) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| |
| if (!port) |
| return; |
| |
| dbg("%s - port %d", __FUNCTION__, port->number); |
| |
| mutex_lock(&port->mutex); |
| |
| if (port->open_count == 0) { |
| mutex_unlock(&port->mutex); |
| 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->open_count == (port->console? 1 : 0)) { |
| if (port->tty) { |
| if (port->tty->driver_data) |
| port->tty->driver_data = NULL; |
| port->tty = NULL; |
| } |
| } |
| |
| if (port->open_count == 0) { |
| usb_autopm_put_interface(port->serial->interface); |
| module_put(port->serial->type->driver.owner); |
| } |
| |
| mutex_unlock(&port->mutex); |
| usb_serial_put(port->serial); |
| } |
| |
| static int serial_write (struct tty_struct * tty, const unsigned char *buf, int count) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| int retval = -ENODEV; |
| |
| if (!port || port->serial->dev->state == USB_STATE_NOTATTACHED) |
| goto exit; |
| |
| dbg("%s - port %d, %d byte(s)", __FUNCTION__, port->number, count); |
| |
| if (!port->open_count) { |
| retval = -EINVAL; |
| 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 = tty->driver_data; |
| int retval = -ENODEV; |
| |
| if (!port) |
| goto exit; |
| |
| 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 = tty->driver_data; |
| int retval = -ENODEV; |
| |
| if (!port) |
| goto exit; |
| |
| 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 = tty->driver_data; |
| |
| if (!port) |
| return; |
| |
| 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 = tty->driver_data; |
| |
| if (!port) |
| return; |
| |
| 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 = tty->driver_data; |
| int retval = -ENODEV; |
| |
| if (!port) |
| goto exit; |
| |
| 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 ktermios * old) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| |
| if (!port) |
| return; |
| |
| 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); |
| else |
| tty_termios_copy_hw(tty->termios, old); |
| } |
| |
| static void serial_break (struct tty_struct *tty, int break_state) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| |
| if (!port) |
| return; |
| |
| 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:2.0\n"); |
| 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->driver.owner) |
| length += sprintf (page+length, " module:%s", module_name(serial->type->driver.owner)); |
| length += sprintf (page+length, " name:\"%s\"", serial->type->description); |
| 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)) { |
| usb_serial_put(serial); |
| goto done; |
| } |
| if ((length + begin) < off) { |
| begin += length; |
| length = 0; |
| } |
| usb_serial_put(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 = tty->driver_data; |
| |
| if (!port) |
| return -ENODEV; |
| |
| dbg("%s - port %d", __FUNCTION__, port->number); |
| |
| if (!port->open_count) { |
| dbg("%s - port not open", __FUNCTION__); |
| return -ENODEV; |
| } |
| |
| if (port->serial->type->tiocmget) |
| return port->serial->type->tiocmget(port, file); |
| |
| return -EINVAL; |
| } |
| |
| static int serial_tiocmset (struct tty_struct *tty, struct file *file, |
| unsigned int set, unsigned int clear) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| |
| if (!port) |
| return -ENODEV; |
| |
| dbg("%s - port %d", __FUNCTION__, port->number); |
| |
| if (!port->open_count) { |
| dbg("%s - port not open", __FUNCTION__); |
| return -ENODEV; |
| } |
| |
| if (port->serial->type->tiocmset) |
| return port->serial->type->tiocmset(port, file, set, clear); |
| |
| return -EINVAL; |
| } |
| |
| /* |
| * We would be calling tty_wakeup here, but unfortunately some line |
| * disciplines have an annoying habit of calling tty->write from |
| * the write wakeup callback (e.g. n_hdlc.c). |
| */ |
| void usb_serial_port_softint(struct usb_serial_port *port) |
| { |
| schedule_work(&port->work); |
| } |
| |
| static void usb_serial_port_work(struct work_struct *work) |
| { |
| struct usb_serial_port *port = |
| container_of(work, struct usb_serial_port, work); |
| 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); |
| port_free(port); |
| } |
| |
| static void kill_traffic(struct usb_serial_port *port) |
| { |
| usb_kill_urb(port->read_urb); |
| usb_kill_urb(port->write_urb); |
| /* |
| * This is tricky. |
| * Some drivers submit the read_urb in the |
| * handler for the write_urb or vice versa |
| * this order determines the order in which |
| * usb_kill_urb() must be used to reliably |
| * kill the URBs. As it is unknown here, |
| * both orders must be used in turn. |
| * The call below is not redundant. |
| */ |
| usb_kill_urb(port->read_urb); |
| usb_kill_urb(port->interrupt_in_urb); |
| usb_kill_urb(port->interrupt_out_urb); |
| } |
| |
| static void port_free(struct usb_serial_port *port) |
| { |
| kill_traffic(port); |
| usb_free_urb(port->read_urb); |
| usb_free_urb(port->write_urb); |
| usb_free_urb(port->interrupt_in_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); |
| flush_scheduled_work(); /* port->work */ |
| kfree(port); |
| } |
| |
| static struct usb_serial * create_serial (struct usb_device *dev, |
| struct usb_interface *interface, |
| struct usb_serial_driver *driver) |
| { |
| struct usb_serial *serial; |
| |
| serial = kzalloc(sizeof(*serial), GFP_KERNEL); |
| if (!serial) { |
| dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__); |
| return NULL; |
| } |
| serial->dev = usb_get_dev(dev); |
| serial->type = driver; |
| serial->interface = interface; |
| kref_init(&serial->kref); |
| |
| return serial; |
| } |
| |
| static const struct usb_device_id *match_dynamic_id(struct usb_interface *intf, |
| struct usb_serial_driver *drv) |
| { |
| struct usb_dynid *dynid; |
| |
| spin_lock(&drv->dynids.lock); |
| list_for_each_entry(dynid, &drv->dynids.list, node) { |
| if (usb_match_one_id(intf, &dynid->id)) { |
| spin_unlock(&drv->dynids.lock); |
| return &dynid->id; |
| } |
| } |
| spin_unlock(&drv->dynids.lock); |
| return NULL; |
| } |
| |
| static const struct usb_device_id *get_iface_id(struct usb_serial_driver *drv, |
| struct usb_interface *intf) |
| { |
| const struct usb_device_id *id; |
| |
| id = usb_match_id(intf, drv->id_table); |
| if (id) { |
| dbg("static descriptor matches"); |
| goto exit; |
| } |
| id = match_dynamic_id(intf, drv); |
| if (id) |
| dbg("dynamic descriptor matches"); |
| exit: |
| return id; |
| } |
| |
| static struct usb_serial_driver *search_serial_device(struct usb_interface *iface) |
| { |
| const struct usb_device_id *id; |
| struct usb_serial_driver *drv; |
| |
| /* Check if the usb id matches a known device */ |
| list_for_each_entry(drv, &usb_serial_driver_list, driver_list) { |
| id = get_iface_id(drv, iface); |
| if (id) |
| return drv; |
| } |
| |
| 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_driver *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; |
| |
| lock_kernel(); /* guard against unloading a serial driver module */ |
| type = search_serial_device(interface); |
| if (!type) { |
| unlock_kernel(); |
| dbg("none matched"); |
| return -ENODEV; |
| } |
| |
| serial = create_serial (dev, interface, type); |
| if (!serial) { |
| unlock_kernel(); |
| 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->driver.owner)) { |
| unlock_kernel(); |
| dev_err(&interface->dev, "module get failed, exiting\n"); |
| kfree (serial); |
| return -EIO; |
| } |
| |
| id = get_iface_id(type, interface); |
| retval = type->probe(serial, id); |
| module_put(type->driver.owner); |
| |
| if (retval) { |
| unlock_kernel(); |
| 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 (usb_endpoint_is_bulk_in(endpoint)) { |
| /* 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 (usb_endpoint_is_bulk_out(endpoint)) { |
| /* 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 (usb_endpoint_is_int_in(endpoint)) { |
| /* 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 (usb_endpoint_is_int_out(endpoint)) { |
| /* 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)) || |
| ((le16_to_cpu(dev->descriptor.idVendor) == ALCOR_VENDOR_ID) && |
| (le16_to_cpu(dev->descriptor.idProduct) == ALCOR_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 (usb_endpoint_is_int_in(endpoint)) { |
| /* 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) { |
| unlock_kernel(); |
| dev_info(&interface->dev, "PL-2303 hack: descriptors matched but endpoints did not\n"); |
| kfree (serial); |
| return -ENODEV; |
| } |
| } |
| /* END HORRIBLE HACK FOR PL2303 */ |
| #endif |
| |
| #ifdef CONFIG_USB_SERIAL_GENERIC |
| if (type == &usb_serial_generic_device) { |
| num_ports = num_bulk_out; |
| if (num_ports == 0) { |
| unlock_kernel(); |
| 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->driver.owner)) { |
| unlock_kernel(); |
| dev_err(&interface->dev, "module get failed, exiting\n"); |
| kfree (serial); |
| return -EIO; |
| } |
| num_ports = type->calc_num_ports (serial); |
| module_put(type->driver.owner); |
| } |
| if (!num_ports) |
| num_ports = type->num_ports; |
| } |
| |
| 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; |
| |
| /* check that the device meets the driver's requirements */ |
| if ((type->num_interrupt_in != NUM_DONT_CARE && |
| type->num_interrupt_in != num_interrupt_in) |
| || (type->num_interrupt_out != NUM_DONT_CARE && |
| type->num_interrupt_out != num_interrupt_out) |
| || (type->num_bulk_in != NUM_DONT_CARE && |
| type->num_bulk_in != num_bulk_in) |
| || (type->num_bulk_out != NUM_DONT_CARE && |
| type->num_bulk_out != num_bulk_out)) { |
| dbg("wrong number of endpoints"); |
| kfree(serial); |
| return -EIO; |
| } |
| |
| /* found all that we need */ |
| dev_info(&interface->dev, "%s converter detected\n", |
| type->description); |
| |
| /* 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; |
| unlock_kernel(); |
| |
| dbg("%s - setting up %d port structures for this device", __FUNCTION__, max_endpoints); |
| for (i = 0; i < max_endpoints; ++i) { |
| port = kzalloc(sizeof(struct usb_serial_port), GFP_KERNEL); |
| if (!port) |
| goto probe_error; |
| port->serial = serial; |
| spin_lock_init(&port->lock); |
| mutex_init(&port->mutex); |
| INIT_WORK(&port->work, usb_serial_port_work); |
| 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->driver.owner)) { |
| dev_err(&interface->dev, "module get failed, exiting\n"); |
| goto probe_error; |
| } |
| retval = type->attach (serial); |
| module_put(type->driver.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; |
| } |
| } |
| |
| if (get_free_serial (serial, num_ports, &minor) == NULL) { |
| dev_err(&interface->dev, "No more free serial devices\n"); |
| goto probe_error; |
| } |
| serial->minor = minor; |
| |
| /* 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); |
| retval = device_register(&port->dev); |
| if (retval) |
| dev_err(&port->dev, "Error registering port device, " |
| "continuing\n"); |
| } |
| |
| 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; |
| 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; |
| 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; |
| 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; |
| usb_free_urb(port->interrupt_out_urb); |
| kfree(port->interrupt_out_buffer); |
| } |
| |
| /* 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; |
| |
| usb_serial_console_disconnect(serial); |
| dbg ("%s", __FUNCTION__); |
| |
| usb_set_intfdata (interface, NULL); |
| if (serial) { |
| for (i = 0; i < serial->num_ports; ++i) { |
| port = serial->port[i]; |
| if (port) { |
| if (port->tty) |
| tty_hangup(port->tty); |
| kill_traffic(port); |
| } |
| } |
| /* let the last holder of this object |
| * cause it to be cleaned up */ |
| usb_serial_put(serial); |
| } |
| dev_info(dev, "device disconnected\n"); |
| } |
| |
| int usb_serial_suspend(struct usb_interface *intf, pm_message_t message) |
| { |
| struct usb_serial *serial = usb_get_intfdata(intf); |
| struct usb_serial_port *port; |
| int i, r = 0; |
| |
| if (!serial) /* device has been disconnected */ |
| return 0; |
| |
| for (i = 0; i < serial->num_ports; ++i) { |
| port = serial->port[i]; |
| if (port) |
| kill_traffic(port); |
| } |
| |
| if (serial->type->suspend) |
| r = serial->type->suspend(serial, message); |
| |
| return r; |
| } |
| EXPORT_SYMBOL(usb_serial_suspend); |
| |
| int usb_serial_resume(struct usb_interface *intf) |
| { |
| struct usb_serial *serial = usb_get_intfdata(intf); |
| |
| if (serial->type->resume) |
| return serial->type->resume(serial); |
| return 0; |
| } |
| EXPORT_SYMBOL(usb_serial_resume); |
| |
| static const 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; |
| } |
| |
| usb_serial_tty_driver->owner = THIS_MODULE; |
| usb_serial_tty_driver->driver_name = "usbserial"; |
| 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_DYNAMIC_DEV; |
| 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; |
| } |
| |
| /* 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; |
| } |
| |
| info(DRIVER_DESC); |
| |
| return result; |
| |
| exit_generic: |
| usb_deregister(&usb_serial_driver); |
| |
| exit_tty: |
| tty_unregister_driver(usb_serial_tty_driver); |
| |
| exit_reg_driver: |
| 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_driver *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); |
| set_to_generic_if_null(device, resume); |
| } |
| |
| int usb_serial_register(struct usb_serial_driver *driver) /* must be called with BKL held */ |
| { |
| int retval; |
| |
| fixup_generic(driver); |
| |
| if (!driver->description) |
| driver->description = driver->driver.name; |
| |
| /* Add this device to our list of devices */ |
| list_add(&driver->driver_list, &usb_serial_driver_list); |
| |
| retval = usb_serial_bus_register(driver); |
| if (retval) { |
| err("problem %d when registering driver %s", retval, driver->description); |
| list_del(&driver->driver_list); |
| } |
| else |
| info("USB Serial support registered for %s", driver->description); |
| |
| return retval; |
| } |
| |
| |
| void usb_serial_deregister(struct usb_serial_driver *device) /* must be called with BKL held */ |
| { |
| info("USB Serial deregistering driver %s", device->description); |
| 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_LICENSE("GPL"); |
| |
| module_param(debug, bool, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(debug, "Debug enabled or not"); |