2 * USB Serial Converter stuff
4 * Copyright (C) 1999 - 2005
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; version 2 of the License.
14 #ifndef __LINUX_USB_SERIAL_H
15 #define __LINUX_USB_SERIAL_H
17 #include <linux/kref.h>
18 #include <linux/mutex.h>
20 #define SERIAL_TTY_MAJOR 188 /* Nice legal number now */
21 #define SERIAL_TTY_MINORS 255 /* loads of devices :) */
23 #define MAX_NUM_PORTS 8 /* The maximum number of ports one device can grab at once */
25 /* parity check flag */
26 #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
29 * usb_serial_port: structure for the specific ports of a device.
30 * @serial: pointer back to the struct usb_serial owner of this port.
31 * @tty: pointer to the corresponding tty for this port.
32 * @lock: spinlock to grab when updating portions of this structure.
33 * @mutex: mutex used to synchronize serial_open() and serial_close()
34 * access for this port.
35 * @number: the number of the port (the minor number).
36 * @interrupt_in_buffer: pointer to the interrupt in buffer for this port.
37 * @interrupt_in_urb: pointer to the interrupt in struct urb for this port.
38 * @interrupt_in_endpointAddress: endpoint address for the interrupt in pipe
40 * @interrupt_out_buffer: pointer to the interrupt out buffer for this port.
41 * @interrupt_out_size: the size of the interrupt_out_buffer, in bytes.
42 * @interrupt_out_urb: pointer to the interrupt out struct urb for this port.
43 * @interrupt_out_endpointAddress: endpoint address for the interrupt out pipe
45 * @bulk_in_buffer: pointer to the bulk in buffer for this port.
46 * @read_urb: pointer to the bulk in struct urb for this port.
47 * @bulk_in_endpointAddress: endpoint address for the bulk in pipe for this
49 * @bulk_out_buffer: pointer to the bulk out buffer for this port.
50 * @bulk_out_size: the size of the bulk_out_buffer, in bytes.
51 * @write_urb: pointer to the bulk out struct urb for this port.
52 * @bulk_out_endpointAddress: endpoint address for the bulk out pipe for this
54 * @write_wait: a wait_queue_head_t used by the port.
55 * @work: work queue entry for the line discipline waking up.
56 * @open_count: number of times this port has been opened.
57 * @throttled: nonzero if the read urb is inactive to throttle the device
58 * @throttle_req: nonzero if the tty wants to throttle us
60 * This structure is used by the usb-serial core and drivers for the specific
63 struct usb_serial_port {
64 struct usb_serial * serial;
65 struct tty_struct * tty;
70 unsigned char * interrupt_in_buffer;
71 struct urb * interrupt_in_urb;
72 __u8 interrupt_in_endpointAddress;
74 unsigned char * interrupt_out_buffer;
75 int interrupt_out_size;
76 struct urb * interrupt_out_urb;
77 __u8 interrupt_out_endpointAddress;
79 unsigned char * bulk_in_buffer;
81 struct urb * read_urb;
82 __u8 bulk_in_endpointAddress;
84 unsigned char * bulk_out_buffer;
86 struct urb * write_urb;
88 __u8 bulk_out_endpointAddress;
90 wait_queue_head_t write_wait;
91 struct work_struct work;
97 #define to_usb_serial_port(d) container_of(d, struct usb_serial_port, dev)
99 /* get and set the port private data pointer helper functions */
100 static inline void *usb_get_serial_port_data (struct usb_serial_port *port)
102 return dev_get_drvdata(&port->dev);
105 static inline void usb_set_serial_port_data (struct usb_serial_port *port, void *data)
107 dev_set_drvdata(&port->dev, data);
111 * usb_serial - structure used by the usb-serial core for a device
112 * @dev: pointer to the struct usb_device for this device
113 * @type: pointer to the struct usb_serial_driver for this device
114 * @interface: pointer to the struct usb_interface for this device
115 * @minor: the starting minor number for this device
116 * @num_ports: the number of ports this device has
117 * @num_interrupt_in: number of interrupt in endpoints we have
118 * @num_interrupt_out: number of interrupt out endpoints we have
119 * @num_bulk_in: number of bulk in endpoints we have
120 * @num_bulk_out: number of bulk out endpoints we have
121 * @port: array of struct usb_serial_port structures for the different ports.
122 * @private: place to put any driver specific information that is needed. The
123 * usb-serial driver is required to manage this data, the usb-serial core
124 * will not touch this. Use usb_get_serial_data() and
125 * usb_set_serial_data() to access this.
128 struct usb_device * dev;
129 struct usb_serial_driver * type;
130 struct usb_interface * interface;
132 unsigned char num_ports;
133 unsigned char num_port_pointers;
134 char num_interrupt_in;
135 char num_interrupt_out;
138 struct usb_serial_port * port[MAX_NUM_PORTS];
142 #define to_usb_serial(d) container_of(d, struct usb_serial, kref)
144 #define NUM_DONT_CARE (-1)
146 /* get and set the serial private data pointer helper functions */
147 static inline void *usb_get_serial_data (struct usb_serial *serial)
149 return serial->private;
152 static inline void usb_set_serial_data (struct usb_serial *serial, void *data)
154 serial->private = data;
158 * usb_serial_driver - describes a usb serial driver
159 * @description: pointer to a string that describes this driver. This string used
160 * in the syslog messages when a device is inserted or removed.
161 * @id_table: pointer to a list of usb_device_id structures that define all
162 * of the devices this structure can support.
163 * @num_interrupt_in: the number of interrupt in endpoints this device will
165 * @num_interrupt_out: the number of interrupt out endpoints this device will
167 * @num_bulk_in: the number of bulk in endpoints this device will have.
168 * @num_bulk_out: the number of bulk out endpoints this device will have.
169 * @num_ports: the number of different ports this device will have.
170 * @calc_num_ports: pointer to a function to determine how many ports this
171 * device has dynamically. It will be called after the probe()
172 * callback is called, but before attach()
173 * @probe: pointer to the driver's probe function.
174 * This will be called when the device is inserted into the system,
175 * but before the device has been fully initialized by the usb_serial
176 * subsystem. Use this function to download any firmware to the device,
177 * or any other early initialization that might be needed.
178 * Return 0 to continue on with the initialization sequence. Anything
179 * else will abort it.
180 * @attach: pointer to the driver's attach function.
181 * This will be called when the struct usb_serial structure is fully set
182 * set up. Do any local initialization of the device, or any private
183 * memory structure allocation at this point in time.
184 * @shutdown: pointer to the driver's shutdown function. This will be
185 * called when the device is removed from the system.
186 * @usb_driver: pointer to the struct usb_driver that controls this
187 * device. This is necessary to allow dynamic ids to be added to
188 * the driver from sysfs.
190 * This structure is defines a USB Serial driver. It provides all of
191 * the information that the USB serial core code needs. If the function
192 * pointers are defined, then the USB serial core code will call them when
193 * the corresponding tty port functions are called. If they are not
194 * called, the generic serial function will be used instead.
196 * The driver.owner field should be set to the module owner of this driver.
197 * The driver.name field should be set to the name of this driver (remember
198 * it will show up in sysfs, so it needs to be short and to the point.
199 * Useing the module name is a good idea.)
201 struct usb_serial_driver {
202 const char *description;
203 const struct usb_device_id *id_table;
204 char num_interrupt_in;
205 char num_interrupt_out;
210 struct list_head driver_list;
211 struct device_driver driver;
212 struct usb_driver *usb_driver;
213 struct usb_dynids dynids;
215 int (*probe) (struct usb_serial *serial, const struct usb_device_id *id);
216 int (*attach) (struct usb_serial *serial);
217 int (*calc_num_ports) (struct usb_serial *serial);
219 void (*shutdown) (struct usb_serial *serial);
221 int (*port_probe) (struct usb_serial_port *port);
222 int (*port_remove) (struct usb_serial_port *port);
224 int (*suspend) (struct usb_serial *serial, pm_message_t message);
225 int (*resume) (struct usb_serial *serial);
227 /* serial function calls */
228 int (*open) (struct usb_serial_port *port, struct file * filp);
229 void (*close) (struct usb_serial_port *port, struct file * filp);
230 int (*write) (struct usb_serial_port *port, const unsigned char *buf, int count);
231 int (*write_room) (struct usb_serial_port *port);
232 int (*ioctl) (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg);
233 void (*set_termios) (struct usb_serial_port *port, struct ktermios * old);
234 void (*break_ctl) (struct usb_serial_port *port, int break_state);
235 int (*chars_in_buffer) (struct usb_serial_port *port);
236 void (*throttle) (struct usb_serial_port *port);
237 void (*unthrottle) (struct usb_serial_port *port);
238 int (*tiocmget) (struct usb_serial_port *port, struct file *file);
239 int (*tiocmset) (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear);
241 void (*read_int_callback)(struct urb *urb);
242 void (*write_int_callback)(struct urb *urb);
243 void (*read_bulk_callback)(struct urb *urb);
244 void (*write_bulk_callback)(struct urb *urb);
246 #define to_usb_serial_driver(d) container_of(d, struct usb_serial_driver, driver)
248 extern int usb_serial_register(struct usb_serial_driver *driver);
249 extern void usb_serial_deregister(struct usb_serial_driver *driver);
250 extern void usb_serial_port_softint(struct usb_serial_port *port);
252 extern int usb_serial_probe(struct usb_interface *iface, const struct usb_device_id *id);
253 extern void usb_serial_disconnect(struct usb_interface *iface);
255 extern int usb_serial_suspend(struct usb_interface *intf, pm_message_t message);
256 extern int usb_serial_resume(struct usb_interface *intf);
258 extern int ezusb_writememory (struct usb_serial *serial, int address, unsigned char *data, int length, __u8 bRequest);
259 extern int ezusb_set_reset (struct usb_serial *serial, unsigned char reset_bit);
261 /* USB Serial console functions */
262 #ifdef CONFIG_USB_SERIAL_CONSOLE
263 extern void usb_serial_console_init (int debug, int minor);
264 extern void usb_serial_console_exit (void);
265 extern void usb_serial_console_disconnect(struct usb_serial *serial);
267 static inline void usb_serial_console_init (int debug, int minor) { }
268 static inline void usb_serial_console_exit (void) { }
269 static inline void usb_serial_console_disconnect(struct usb_serial *serial) {}
272 /* Functions needed by other parts of the usbserial core */
273 extern struct usb_serial *usb_serial_get_by_index (unsigned int minor);
274 extern void usb_serial_put(struct usb_serial *serial);
275 extern int usb_serial_generic_open (struct usb_serial_port *port, struct file *filp);
276 extern int usb_serial_generic_write (struct usb_serial_port *port, const unsigned char *buf, int count);
277 extern void usb_serial_generic_close (struct usb_serial_port *port, struct file *filp);
278 extern int usb_serial_generic_resume (struct usb_serial *serial);
279 extern int usb_serial_generic_write_room (struct usb_serial_port *port);
280 extern int usb_serial_generic_chars_in_buffer (struct usb_serial_port *port);
281 extern void usb_serial_generic_read_bulk_callback (struct urb *urb);
282 extern void usb_serial_generic_write_bulk_callback (struct urb *urb);
283 extern void usb_serial_generic_throttle (struct usb_serial_port *port);
284 extern void usb_serial_generic_unthrottle (struct usb_serial_port *port);
285 extern void usb_serial_generic_shutdown (struct usb_serial *serial);
286 extern int usb_serial_generic_register (int debug);
287 extern void usb_serial_generic_deregister (void);
289 extern int usb_serial_bus_register (struct usb_serial_driver *device);
290 extern void usb_serial_bus_deregister (struct usb_serial_driver *device);
292 extern struct usb_serial_driver usb_serial_generic_device;
293 extern struct bus_type usb_serial_bus_type;
294 extern struct tty_driver *usb_serial_tty_driver;
296 static inline void usb_serial_debug_data(int debug,
298 const char *function, int size,
299 const unsigned char *data)
304 dev_printk(KERN_DEBUG, dev, "%s - length = %d, data = ", function, size);
305 for (i = 0; i < size; ++i)
306 printk ("%.2x ", data[i]);
311 /* Use our own dbg macro */
313 #define dbg(format, arg...) do { if (debug) printk(KERN_DEBUG "%s: " format "\n" , __FILE__ , ## arg); } while (0)
317 #endif /* ifdef __LINUX_USB_SERIAL_H */