2 * USB Serial Converter driver
4 * Copyright (C) 1999 - 2003
5 * Greg Kroah-Hartman (greg@kroah.com)
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * See Documentation/usb/usb-serial.txt for more information on using this driver
15 * removed the port->tty check from port_paranoia_check() due to serial
16 * consoles not having a tty device assigned to them.
19 * removed active from the port structure.
20 * added documentation to the usb_serial_device_type structure
23 * added vendor and product to serial structure. Needed to determine device
24 * owner when the device is disconnected.
27 * added sem to port structure and removed port_lock
30 * Added interrupt_in_endpointAddress and bulk_in_endpointAddress to help
31 * fix bug with urb->dev not being set properly, now that the usb core
35 * Added usb_serial_debug_data function to help get rid of #DEBUG in the
39 * Added port_lock to port structure.
42 * Added open_count to port structure.
45 * Added bulk_out_endpointAddress to port structure.
47 * (07/19/2000) gkh, pberger, and borchers
48 * Modifications to allow usb-serial drivers to be modules.
54 #ifndef __LINUX_USB_SERIAL_H
55 #define __LINUX_USB_SERIAL_H
57 #include <linux/config.h>
58 #include <linux/kref.h>
60 #define SERIAL_TTY_MAJOR 188 /* Nice legal number now */
61 #define SERIAL_TTY_MINORS 255 /* loads of devices :) */
63 #define MAX_NUM_PORTS 8 /* The maximum number of ports one device can grab at once */
65 #define USB_SERIAL_MAGIC 0x6702 /* magic number for usb_serial struct */
66 #define USB_SERIAL_PORT_MAGIC 0x7301 /* magic number for usb_serial_port struct */
68 /* parity check flag */
69 #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
72 * usb_serial_port: structure for the specific ports of a device.
73 * @magic: magic number for internal validity of this pointer.
74 * @serial: pointer back to the struct usb_serial owner of this port.
75 * @tty: pointer to the corresponding tty for this port.
76 * @number: the number of the port (the minor number).
77 * @interrupt_in_buffer: pointer to the interrupt in buffer for this port.
78 * @interrupt_in_urb: pointer to the interrupt in struct urb for this port.
79 * @interrupt_in_endpointAddress: endpoint address for the interrupt in pipe
81 * @bulk_in_buffer: pointer to the bulk in buffer for this port.
82 * @read_urb: pointer to the bulk in struct urb for this port.
83 * @bulk_in_endpointAddress: endpoint address for the bulk in pipe for this
85 * @bulk_out_buffer: pointer to the bulk out buffer for this port.
86 * @bulk_out_size: the size of the bulk_out_buffer, in bytes.
87 * @write_urb: pointer to the bulk out struct urb for this port.
88 * @bulk_out_endpointAddress: endpoint address for the bulk out pipe for this
90 * @write_wait: a wait_queue_head_t used by the port.
91 * @work: work queue entry for the line discipline waking up.
92 * @open_count: number of times this port has been opened.
94 * This structure is used by the usb-serial core and drivers for the specific
97 struct usb_serial_port {
99 struct usb_serial *serial;
100 struct tty_struct * tty;
101 unsigned char number;
103 unsigned char * interrupt_in_buffer;
104 struct urb * interrupt_in_urb;
105 __u8 interrupt_in_endpointAddress;
107 unsigned char * bulk_in_buffer;
108 struct urb * read_urb;
109 __u8 bulk_in_endpointAddress;
111 unsigned char * bulk_out_buffer;
113 struct urb * write_urb;
114 __u8 bulk_out_endpointAddress;
116 wait_queue_head_t write_wait;
117 struct work_struct work;
121 #define to_usb_serial_port(d) container_of(d, struct usb_serial_port, dev)
123 /* get and set the port private data pointer helper functions */
124 static inline void *usb_get_serial_port_data (struct usb_serial_port *port)
126 return dev_get_drvdata(&port->dev);
129 static inline void usb_set_serial_port_data (struct usb_serial_port *port, void *data)
131 dev_set_drvdata(&port->dev, data);
135 * usb_serial - structure used by the usb-serial core for a device
136 * @magic: magic number for internal validity of this pointer.
137 * @dev: pointer to the struct usb_device for this device
138 * @type: pointer to the struct usb_serial_device_type for this device
139 * @interface: pointer to the struct usb_interface for this device
140 * @minor: the starting minor number for this device
141 * @num_ports: the number of ports this device has
142 * @num_interrupt_in: number of interrupt in endpoints we have
143 * @num_bulk_in: number of bulk in endpoints we have
144 * @num_bulk_out: number of bulk out endpoints we have
145 * @vendor: vendor id of this device
146 * @product: product id of this device
147 * @port: array of struct usb_serial_port structures for the different ports.
148 * @private: place to put any driver specific information that is needed. The
149 * usb-serial driver is required to manage this data, the usb-serial core
150 * will not touch this. Use usb_get_serial_data() and
151 * usb_set_serial_data() to access this.
155 struct usb_device * dev;
156 struct usb_serial_device_type * type;
157 struct usb_interface * interface;
159 unsigned char num_ports;
160 unsigned char num_port_pointers;
161 char num_interrupt_in;
166 struct usb_serial_port * port[MAX_NUM_PORTS];
170 #define to_usb_serial(d) container_of(d, struct usb_serial, kref)
172 #define NUM_DONT_CARE (-1)
174 /* get and set the serial private data pointer helper functions */
175 static inline void *usb_get_serial_data (struct usb_serial *serial)
177 return serial->private;
180 static inline void usb_set_serial_data (struct usb_serial *serial, void *data)
182 serial->private = data;
186 * usb_serial_device_type - a structure that defines a usb serial device
187 * @owner: pointer to the module that owns this device.
188 * @name: pointer to a string that describes this device. This string used
189 * in the syslog messages when a device is inserted or removed.
190 * @short_name: a pointer to a string that describes this device in
191 * KOBJ_NAME_LEN characters or less. This is used for the sysfs interface
192 * to describe the driver.
193 * @id_table: pointer to a list of usb_device_id structures that define all
194 * of the devices this structure can support.
195 * @num_interrupt_in: the number of interrupt in endpoints this device will
197 * @num_bulk_in: the number of bulk in endpoints this device will have.
198 * @num_bulk_out: the number of bulk out endpoints this device will have.
199 * @num_ports: the number of different ports this device will have.
200 * @calc_num_ports: pointer to a function to determine how many ports this
201 * device has dynamically. It will be called after the probe()
202 * callback is called, but before attach()
203 * @probe: pointer to the driver's probe function.
204 * This will be called when the device is inserted into the system,
205 * but before the device has been fully initialized by the usb_serial
206 * subsystem. Use this function to download any firmware to the device,
207 * or any other early initialization that might be needed.
208 * Return 0 to continue on with the initialization sequence. Anything
209 * else will abort it.
210 * @attach: pointer to the driver's attach function.
211 * This will be called when the struct usb_serial structure is fully set
212 * set up. Do any local initialization of the device, or any private
213 * memory structure allocation at this point in time.
214 * @shutdown: pointer to the driver's shutdown function. This will be
215 * called when the device is removed from the system.
217 * This structure is defines a USB Serial device. It provides all of
218 * the information that the USB serial core code needs. If the function
219 * pointers are defined, then the USB serial core code will call them when
220 * the corresponding tty port functions are called. If they are not
221 * called, the generic serial function will be used instead.
223 struct usb_serial_device_type {
224 struct module *owner;
227 const struct usb_device_id *id_table;
228 char num_interrupt_in;
233 struct list_head driver_list;
234 struct device_driver driver;
236 int (*probe) (struct usb_serial *serial, const struct usb_device_id *id);
237 int (*attach) (struct usb_serial *serial);
238 int (*calc_num_ports) (struct usb_serial *serial);
240 void (*shutdown) (struct usb_serial *serial);
242 int (*port_probe) (struct usb_serial_port *port);
243 int (*port_remove) (struct usb_serial_port *port);
245 /* serial function calls */
246 int (*open) (struct usb_serial_port *port, struct file * filp);
247 void (*close) (struct usb_serial_port *port, struct file * filp);
248 int (*write) (struct usb_serial_port *port, int from_user, const unsigned char *buf, int count);
249 int (*write_room) (struct usb_serial_port *port);
250 int (*ioctl) (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg);
251 void (*set_termios) (struct usb_serial_port *port, struct termios * old);
252 void (*break_ctl) (struct usb_serial_port *port, int break_state);
253 int (*chars_in_buffer) (struct usb_serial_port *port);
254 void (*throttle) (struct usb_serial_port *port);
255 void (*unthrottle) (struct usb_serial_port *port);
256 int (*tiocmget) (struct usb_serial_port *port, struct file *file);
257 int (*tiocmset) (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear);
259 void (*read_int_callback)(struct urb *urb, struct pt_regs *regs);
260 void (*read_bulk_callback)(struct urb *urb, struct pt_regs *regs);
261 void (*write_bulk_callback)(struct urb *urb, struct pt_regs *regs);
263 #define to_usb_serial_driver(d) container_of(d, struct usb_serial_device_type, driver)
265 extern int usb_serial_register(struct usb_serial_device_type *new_device);
266 extern void usb_serial_deregister(struct usb_serial_device_type *device);
267 extern void usb_serial_port_softint(void *private);
269 extern int usb_serial_probe(struct usb_interface *iface, const struct usb_device_id *id);
270 extern void usb_serial_disconnect(struct usb_interface *iface);
272 extern int ezusb_writememory (struct usb_serial *serial, int address, unsigned char *data, int length, __u8 bRequest);
273 extern int ezusb_set_reset (struct usb_serial *serial, unsigned char reset_bit);
275 /* USB Serial console functions */
276 #ifdef CONFIG_USB_SERIAL_CONSOLE
277 extern void usb_serial_console_init (int debug, int minor);
278 extern void usb_serial_console_exit (void);
280 static inline void usb_serial_console_init (int debug, int minor) { }
281 static inline void usb_serial_console_exit (void) { }
284 /* Functions needed by other parts of the usbserial core */
285 extern struct usb_serial *usb_serial_get_by_index (unsigned int minor);
286 extern int usb_serial_generic_open (struct usb_serial_port *port, struct file *filp);
287 extern int usb_serial_generic_write (struct usb_serial_port *port, int from_user, const unsigned char *buf, int count);
288 extern void usb_serial_generic_close (struct usb_serial_port *port, struct file *filp);
289 extern int usb_serial_generic_write_room (struct usb_serial_port *port);
290 extern int usb_serial_generic_chars_in_buffer (struct usb_serial_port *port);
291 extern void usb_serial_generic_read_bulk_callback (struct urb *urb, struct pt_regs *regs);
292 extern void usb_serial_generic_write_bulk_callback (struct urb *urb, struct pt_regs *regs);
293 extern void usb_serial_generic_shutdown (struct usb_serial *serial);
294 extern int usb_serial_generic_register (int debug);
295 extern void usb_serial_generic_deregister (void);
297 extern int usb_serial_bus_register (struct usb_serial_device_type *device);
298 extern void usb_serial_bus_deregister (struct usb_serial_device_type *device);
300 extern struct usb_serial_device_type usb_serial_generic_device;
301 extern struct bus_type usb_serial_bus_type;
302 extern struct tty_driver *usb_serial_tty_driver;
304 /* Inline functions to check the sanity of a pointer that is passed to us */
305 static inline int serial_paranoia_check (struct usb_serial *serial, const char *function)
308 dbg("%s - serial == NULL", function);
311 if (serial->magic != USB_SERIAL_MAGIC) {
312 dbg("%s - bad magic number for serial", function);
316 dbg("%s - serial->type == NULL!", function);
324 static inline int port_paranoia_check (struct usb_serial_port *port, const char *function)
327 dbg("%s - port == NULL", function);
330 if (port->magic != USB_SERIAL_PORT_MAGIC) {
331 dbg("%s - bad magic number for port", function);
335 dbg("%s - port->serial == NULL", function);
343 static inline struct usb_serial* get_usb_serial (struct usb_serial_port *port, const char *function)
345 /* if no port was specified, or it fails a paranoia check */
347 port_paranoia_check (port, function) ||
348 serial_paranoia_check (port->serial, function)) {
349 /* then say that we don't have a valid usb_serial thing, which will
350 * end up genrating -ENODEV return values */
358 static inline void usb_serial_debug_data (const char *file, const char *function, int size, const unsigned char *data)
365 printk (KERN_DEBUG "%s: %s - length = %d, data = ", file, function, size);
366 for (i = 0; i < size; ++i) {
367 printk ("%.2x ", data[i]);
373 /* Use our own dbg macro */
375 #define dbg(format, arg...) do { if (debug) printk(KERN_DEBUG "%s: " format "\n" , __FILE__ , ## arg); } while (0)
379 #endif /* ifdef __LINUX_USB_SERIAL_H */