usb-serial.h
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- /*
- * USB Serial Converter driver
- *
- * Copyright (C) 1999 - 2002
- * 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.
- *
- * See Documentation/usb/usb-serial.txt for more information on using this driver
- *
- * (12/03/2001) gkh
- * removed active from the port structure.
- * added documentation to the usb_serial_device_type structure
- *
- * (10/10/2001) gkh
- * added vendor and product to serial structure. Needed to determine device
- * owner when the device is disconnected.
- *
- * (05/30/2001) gkh
- * added sem to port structure and removed port_lock
- *
- * (10/05/2000) gkh
- * Added interrupt_in_endpointAddress and bulk_in_endpointAddress to help
- * fix bug with urb->dev not being set properly, now that the usb core
- * needs it.
- *
- * (09/11/2000) gkh
- * Added usb_serial_debug_data function to help get rid of #DEBUG in the
- * drivers.
- *
- * (08/28/2000) gkh
- * Added port_lock to port structure.
- *
- * (08/08/2000) gkh
- * Added open_count to port structure.
- *
- * (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.
- *
- *
- */
- #ifndef __LINUX_USB_SERIAL_H
- #define __LINUX_USB_SERIAL_H
- #include <linux/config.h>
- #define SERIAL_TTY_MAJOR 188 /* Nice legal number now */
- #define SERIAL_TTY_MINORS 255 /* loads of devices :) */
- #define MAX_NUM_PORTS 8 /* The maximum number of ports one device can grab at once */
- #define USB_SERIAL_MAGIC 0x6702 /* magic number for usb_serial struct */
- #define USB_SERIAL_PORT_MAGIC 0x7301 /* magic number for usb_serial_port struct */
- /* parity check flag */
- #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
- /**
- * usb_serial_port: structure for the specific ports of a device.
- * @magic: magic number for internal validity of this pointer.
- * @serial: pointer back to the struct usb_serial owner of this port.
- * @tty: pointer to the coresponding tty for this port.
- * @number: the number of the port (the minor number).
- * @interrupt_in_buffer: pointer to the interrupt in buffer for this port.
- * @interrupt_in_urb: pointer to the interrupt in struct urb for this port.
- * @interrupt_in_endpointAddress: endpoint address for the interrupt in pipe
- * for this port.
- * @bulk_in_buffer: pointer to the bulk in buffer for this port.
- * @read_urb: pointer to the bulk in struct urb for this port.
- * @bulk_in_endpointAddress: endpoint address for the bulk in pipe for this
- * port.
- * @bulk_out_buffer: pointer to the bulk out buffer for this port.
- * @bulk_out_size: the size of the bulk_out_buffer, in bytes.
- * @write_urb: pointer to the bulk out struct urb for this port.
- * @bulk_out_endpointAddress: endpoint address for the bulk out pipe for this
- * port.
- * @write_wait: a wait_queue_head_t used by the port.
- * @tqueue: task queue for the line discipline waking up.
- * @open_count: number of times this port has been opened.
- * @sem: struct semaphore used to lock this structure.
- * @private: place to put any driver specific information that is needed. The
- * usb-serial driver is required to manage this data, the usb-serial core
- * will not touch this.
- *
- * This structure is used by the usb-serial core and drivers for the specific
- * ports of a device.
- */
- struct usb_serial_port {
- int magic;
- struct usb_serial *serial;
- struct tty_struct * tty;
- unsigned char number;
- unsigned char * interrupt_in_buffer;
- struct urb * interrupt_in_urb;
- __u8 interrupt_in_endpointAddress;
- unsigned char * bulk_in_buffer;
- struct urb * read_urb;
- __u8 bulk_in_endpointAddress;
- unsigned char * bulk_out_buffer;
- int bulk_out_size;
- struct urb * write_urb;
- __u8 bulk_out_endpointAddress;
- wait_queue_head_t write_wait;
- struct tq_struct tqueue;
- int open_count;
- struct semaphore sem;
- void * private;
- };
- /**
- * usb_serial - structure used by the usb-serial core for a device
- * @magic: magic number for internal validity of this pointer.
- * @dev: pointer to the struct usb_device for this device
- * @type: pointer to the struct usb_serial_device_type for this device
- * @interface: pointer to the struct usb_interface for this device
- * @minor: the starting minor number for this device
- * @num_ports: the number of ports this device has
- * @num_interrupt_in: number of interrupt in endpoints we have
- * @num_bulk_in: number of bulk in endpoints we have
- * @num_bulk_out: number of bulk out endpoints we have
- * @vendor: vendor id of this device
- * @product: product id of this device
- * @port: array of struct usb_serial_port structures for the different ports.
- * @private: place to put any driver specific information that is needed. The
- * usb-serial driver is required to manage this data, the usb-serial core
- * will not touch this.
- */
- struct usb_serial {
- int magic;
- struct usb_device * dev;
- struct usb_serial_device_type * type;
- struct usb_interface * interface;
- unsigned char minor;
- unsigned char num_ports;
- char num_interrupt_in;
- char num_bulk_in;
- char num_bulk_out;
- __u16 vendor;
- __u16 product;
- struct usb_serial_port port[MAX_NUM_PORTS];
- void * private;
- };
- #define NUM_DONT_CARE (-1)
- /**
- * usb_serial_device_type - a structure that defines a usb serial device
- * @owner: pointer to the module that owns this device.
- * @name: pointer to a string that describes this device. This string used
- * in the syslog messages when a device is inserted or removed.
- * @id_table: pointer to a list of usb_device_id structures that define all
- * of the devices this structure can support.
- * @num_interrupt_in: the number of interrupt in endpoints this device will
- * have.
- * @num_bulk_in: the number of bulk in endpoints this device will have.
- * @num_bulk_out: the number of bulk out endpoints this device will have.
- * @num_ports: the number of different ports this device will have.
- * @calc_num_ports: pointer to a function to determine how many ports this
- * device has dynamically. It will be called after the probe()
- * callback is called, but before attach()
- * @startup: pointer to the driver's startup function.
- * This will be called when the device is inserted into the system,
- * but before the device has been fully initialized by the usb_serial
- * subsystem. Use this function to download any firmware to the device,
- * or any other early initialization that might be needed.
- * Return 0 to continue on with the initialization sequence. Anything
- * else will abort it.
- * @shutdown: pointer to the driver's shutdown function. This will be
- * called when the device is removed from the system.
- *
- * This structure is defines a USB Serial device. It provides all of
- * the information that the USB serial core code needs. If the function
- * pointers are defined, then the USB serial core code will call them when
- * the corresponding tty port functions are called. If they are not
- * called, the generic serial function will be used instead.
- */
- struct usb_serial_device_type {
- struct module *owner;
- char *name;
- const struct usb_device_id *id_table;
- char num_interrupt_in;
- char num_bulk_in;
- char num_bulk_out;
- char num_ports;
- struct list_head driver_list;
-
- int (*startup) (struct usb_serial *serial);
-
- void (*shutdown) (struct usb_serial *serial);
- /* serial function calls */
- int (*open) (struct usb_serial_port *port, struct file * filp);
- void (*close) (struct usb_serial_port *port, struct file * filp);
- int (*write) (struct usb_serial_port *port, int from_user, const unsigned char *buf, int count);
- int (*write_room) (struct usb_serial_port *port);
- int (*ioctl) (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg);
- void (*set_termios) (struct usb_serial_port *port, struct termios * old);
- void (*break_ctl) (struct usb_serial_port *port, int break_state);
- int (*chars_in_buffer) (struct usb_serial_port *port);
- void (*throttle) (struct usb_serial_port *port);
- void (*unthrottle) (struct usb_serial_port *port);
- void (*read_int_callback)(struct urb *urb);
- void (*read_bulk_callback)(struct urb *urb);
- void (*write_bulk_callback)(struct urb *urb);
- };
- extern int usb_serial_register(struct usb_serial_device_type *new_device);
- extern void usb_serial_deregister(struct usb_serial_device_type *device);
- /* determine if we should include the EzUSB loader functions */
- #undef USES_EZUSB_FUNCTIONS
- #if defined(CONFIG_USB_SERIAL_KEYSPAN_PDA) || defined(CONFIG_USB_SERIAL_KEYSPAN_PDA_MODULE)
- #define USES_EZUSB_FUNCTIONS
- #endif
- #if defined(CONFIG_USB_SERIAL_XIRCOM) || defined(CONFIG_USB_SERIAL_XIRCOM_MODULE)
- #define USES_EZUSB_FUNCTIONS
- #endif
- #if defined(CONFIG_USB_SERIAL_KEYSPAN) || defined(CONFIG_USB_SERIAL_KEYSPAN_MODULE)
- #define USES_EZUSB_FUNCTIONS
- #endif
- #if defined(CONFIG_USB_SERIAL_WHITEHEAT) || defined(CONFIG_USB_SERIAL_WHITEHEAT_MODULE)
- #define USES_EZUSB_FUNCTIONS
- #endif
- #ifdef USES_EZUSB_FUNCTIONS
- extern int ezusb_writememory (struct usb_serial *serial, int address, unsigned char *data, int length, __u8 bRequest);
- extern int ezusb_set_reset (struct usb_serial *serial, unsigned char reset_bit);
- #endif
- /* Inline functions to check the sanity of a pointer that is passed to us */
- static inline int serial_paranoia_check (struct usb_serial *serial, const char *function)
- {
- if (!serial) {
- dbg("%s - serial == NULL", function);
- return -1;
- }
- if (serial->magic != USB_SERIAL_MAGIC) {
- dbg("%s - bad magic number for serial", function);
- return -1;
- }
- if (!serial->type) {
- dbg("%s - serial->type == NULL!", function);
- return -1;
- }
- return 0;
- }
- static inline int port_paranoia_check (struct usb_serial_port *port, const char *function)
- {
- if (!port) {
- dbg("%s - port == NULL", function);
- return -1;
- }
- if (port->magic != USB_SERIAL_PORT_MAGIC) {
- dbg("%s - bad magic number for port", function);
- return -1;
- }
- if (!port->serial) {
- dbg("%s - port->serial == NULL", function);
- return -1;
- }
- if (!port->tty) {
- dbg("%s - port->tty == NULL", function);
- return -1;
- }
- return 0;
- }
- 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 inline void usb_serial_debug_data (const char *file, const char *function, int size, const unsigned char *data)
- {
- int i;
- if (!debug)
- return;
-
- printk (KERN_DEBUG "%s: %s - length = %d, data = ", file, function, size);
- for (i = 0; i < size; ++i) {
- printk ("%.2x ", data[i]);
- }
- printk ("n");
- }
- /* Use our own dbg macro */
- #undef dbg
- #define dbg(format, arg...) do { if (debug) printk(KERN_DEBUG __FILE__ ": " format "n" , ## arg); } while (0)
- #endif /* ifdef __LINUX_USB_SERIAL_H */