2 * USB Serial Converter driver
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; either version 2 of the License.
14 #ifndef __LINUX_USB_SERIAL_H
15 #define __LINUX_USB_SERIAL_H
17 #include <linux/config.h>
18 #include <linux/kref.h>
19 #include <linux/mutex.h>
21 #define SERIAL_TTY_MAJOR 188 /* Nice legal number now */
22 #define SERIAL_TTY_MINORS 255 /* loads of devices :) */
24 #define MAX_NUM_PORTS 8 /* The maximum number of ports one device can grab at once */
26 /* parity check flag */
27 #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
30 * usb_serial_port: structure for the specific ports of a device.
31 * @serial: pointer back to the struct usb_serial owner of this port.
32 * @tty: pointer to the corresponding tty for this port.
33 * @lock: spinlock to grab when updating portions of this structure.
34 * @mutex: mutex used to synchronize serial_open() and serial_close()
35 * access for this port.
36 * @number: the number of the port (the minor number).
37 * @interrupt_in_buffer: pointer to the interrupt in buffer for this port.
38 * @interrupt_in_urb: pointer to the interrupt in struct urb for this port.
39 * @interrupt_in_endpointAddress: endpoint address for the interrupt in pipe
41 * @interrupt_out_buffer: pointer to the interrupt out buffer for this port.
42 * @interrupt_out_size: the size of the interrupt_out_buffer, in bytes.
43 * @interrupt_out_urb: pointer to the interrupt out struct urb for this port.
44 * @interrupt_out_endpointAddress: endpoint address for the interrupt out pipe
46 * @bulk_in_buffer: pointer to the bulk in buffer for this port.
47 * @read_urb: pointer to the bulk in struct urb for this port.
48 * @bulk_in_endpointAddress: endpoint address for the bulk in pipe for this
50 * @bulk_out_buffer: pointer to the bulk out buffer for this port.
51 * @bulk_out_size: the size of the bulk_out_buffer, in bytes.
52 * @write_urb: pointer to the bulk out struct urb for this port.
53 * @bulk_out_endpointAddress: endpoint address for the bulk out pipe for this
55 * @write_wait: a wait_queue_head_t used by the port.
56 * @work: work queue entry for the line discipline waking up.
57 * @open_count: number of times this port has been opened.
59 * This structure is used by the usb-serial core and drivers for the specific
62 struct usb_serial_port {
63 struct usb_serial * serial;
64 struct tty_struct * tty;
69 unsigned char * interrupt_in_buffer;
70 struct urb * interrupt_in_urb;
71 __u8 interrupt_in_endpointAddress;
73 unsigned char * interrupt_out_buffer;
74 int interrupt_out_size;
75 struct urb * interrupt_out_urb;
76 __u8 interrupt_out_endpointAddress;
78 unsigned char * bulk_in_buffer;
80 struct urb * read_urb;
81 __u8 bulk_in_endpointAddress;
83 unsigned char * bulk_out_buffer;
85 struct urb * write_urb;
87 __u8 bulk_out_endpointAddress;
89 wait_queue_head_t write_wait;
90 struct work_struct work;
94 #define to_usb_serial_port(d) container_of(d, struct usb_serial_port, dev)
96 /* get and set the port private data pointer helper functions */
97 static inline void *usb_get_serial_port_data (struct usb_serial_port *port)
99 return dev_get_drvdata(&port->dev);
102 static inline void usb_set_serial_port_data (struct usb_serial_port *port, void *data)
104 dev_set_drvdata(&port->dev, data);
108 * usb_serial - structure used by the usb-serial core for a device
109 * @dev: pointer to the struct usb_device for this device
110 * @type: pointer to the struct usb_serial_driver for this device
111 * @interface: pointer to the struct usb_interface for this device
112 * @minor: the starting minor number for this device
113 * @num_ports: the number of ports this device has
114 * @num_interrupt_in: number of interrupt in endpoints we have
115 * @num_interrupt_out: number of interrupt out endpoints we have
116 * @num_bulk_in: number of bulk in endpoints we have
117 * @num_bulk_out: number of bulk out endpoints we have
118 * @port: array of struct usb_serial_port structures for the different ports.
119 * @private: place to put any driver specific information that is needed. The
120 * usb-serial driver is required to manage this data, the usb-serial core
121 * will not touch this. Use usb_get_serial_data() and
122 * usb_set_serial_data() to access this.
125 struct usb_device * dev;
126 struct usb_serial_driver * type;
127 struct usb_interface * interface;
129 unsigned char num_ports;
130 unsigned char num_port_pointers;
131 char num_interrupt_in;
132 char num_interrupt_out;
135 struct usb_serial_port * port[MAX_NUM_PORTS];
139 #define to_usb_serial(d) container_of(d, struct usb_serial, kref)
141 #define NUM_DONT_CARE (-1)
143 /* get and set the serial private data pointer helper functions */
144 static inline void *usb_get_serial_data (struct usb_serial *serial)
146 return serial->private;
149 static inline void usb_set_serial_data (struct usb_serial *serial, void *data)
151 serial->private = data;
155 * usb_serial_driver - describes a usb serial driver
156 * @description: pointer to a string that describes this driver. This string used
157 * in the syslog messages when a device is inserted or removed.
158 * @id_table: pointer to a list of usb_device_id structures that define all
159 * of the devices this structure can support.
160 * @num_interrupt_in: the number of interrupt in endpoints this device will
162 * @num_interrupt_out: the number of interrupt out endpoints this device will
164 * @num_bulk_in: the number of bulk in endpoints this device will have.
165 * @num_bulk_out: the number of bulk out endpoints this device will have.
166 * @num_ports: the number of different ports this device will have.
167 * @calc_num_ports: pointer to a function to determine how many ports this
168 * device has dynamically. It will be called after the probe()
169 * callback is called, but before attach()
170 * @probe: pointer to the driver's probe function.
171 * This will be called when the device is inserted into the system,
172 * but before the device has been fully initialized by the usb_serial
173 * subsystem. Use this function to download any firmware to the device,
174 * or any other early initialization that might be needed.
175 * Return 0 to continue on with the initialization sequence. Anything
176 * else will abort it.
177 * @attach: pointer to the driver's attach function.
178 * This will be called when the struct usb_serial structure is fully set
179 * set up. Do any local initialization of the device, or any private
180 * memory structure allocation at this point in time.
181 * @shutdown: pointer to the driver's shutdown function. This will be
182 * called when the device is removed from the system.
184 * This structure is defines a USB Serial driver. It provides all of
185 * the information that the USB serial core code needs. If the function
186 * pointers are defined, then the USB serial core code will call them when
187 * the corresponding tty port functions are called. If they are not
188 * called, the generic serial function will be used instead.
190 * The driver.owner field should be set to the module owner of this driver.
191 * The driver.name field should be set to the name of this driver (remember
192 * it will show up in sysfs, so it needs to be short and to the point.
193 * Useing the module name is a good idea.)
195 struct usb_serial_driver {
196 const char *description;
197 const struct usb_device_id *id_table;
198 char num_interrupt_in;
199 char num_interrupt_out;
204 struct list_head driver_list;
205 struct device_driver driver;
207 int (*probe) (struct usb_serial *serial, const struct usb_device_id *id);
208 int (*attach) (struct usb_serial *serial);
209 int (*calc_num_ports) (struct usb_serial *serial);
211 void (*shutdown) (struct usb_serial *serial);
213 int (*port_probe) (struct usb_serial_port *port);
214 int (*port_remove) (struct usb_serial_port *port);
216 /* serial function calls */
217 int (*open) (struct usb_serial_port *port, struct file * filp);
218 void (*close) (struct usb_serial_port *port, struct file * filp);
219 int (*write) (struct usb_serial_port *port, const unsigned char *buf, int count);
220 int (*write_room) (struct usb_serial_port *port);
221 int (*ioctl) (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg);
222 void (*set_termios) (struct usb_serial_port *port, struct termios * old);
223 void (*break_ctl) (struct usb_serial_port *port, int break_state);
224 int (*chars_in_buffer) (struct usb_serial_port *port);
225 void (*throttle) (struct usb_serial_port *port);
226 void (*unthrottle) (struct usb_serial_port *port);
227 int (*tiocmget) (struct usb_serial_port *port, struct file *file);
228 int (*tiocmset) (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear);
230 void (*read_int_callback)(struct urb *urb, struct pt_regs *regs);
231 void (*write_int_callback)(struct urb *urb, struct pt_regs *regs);
232 void (*read_bulk_callback)(struct urb *urb, struct pt_regs *regs);
233 void (*write_bulk_callback)(struct urb *urb, struct pt_regs *regs);
235 #define to_usb_serial_driver(d) container_of(d, struct usb_serial_driver, driver)
237 extern int usb_serial_register(struct usb_serial_driver *driver);
238 extern void usb_serial_deregister(struct usb_serial_driver *driver);
239 extern void usb_serial_port_softint(void *private);
241 extern int usb_serial_probe(struct usb_interface *iface, const struct usb_device_id *id);
242 extern void usb_serial_disconnect(struct usb_interface *iface);
244 extern int ezusb_writememory (struct usb_serial *serial, int address, unsigned char *data, int length, __u8 bRequest);
245 extern int ezusb_set_reset (struct usb_serial *serial, unsigned char reset_bit);
247 /* USB Serial console functions */
248 #ifdef CONFIG_USB_SERIAL_CONSOLE
249 extern void usb_serial_console_init (int debug, int minor);
250 extern void usb_serial_console_exit (void);
252 static inline void usb_serial_console_init (int debug, int minor) { }
253 static inline void usb_serial_console_exit (void) { }
256 /* Functions needed by other parts of the usbserial core */
257 extern struct usb_serial *usb_serial_get_by_index (unsigned int minor);
258 extern int usb_serial_generic_open (struct usb_serial_port *port, struct file *filp);
259 extern int usb_serial_generic_write (struct usb_serial_port *port, const unsigned char *buf, int count);
260 extern void usb_serial_generic_close (struct usb_serial_port *port, struct file *filp);
261 extern int usb_serial_generic_write_room (struct usb_serial_port *port);
262 extern int usb_serial_generic_chars_in_buffer (struct usb_serial_port *port);
263 extern void usb_serial_generic_read_bulk_callback (struct urb *urb, struct pt_regs *regs);
264 extern void usb_serial_generic_write_bulk_callback (struct urb *urb, struct pt_regs *regs);
265 extern void usb_serial_generic_shutdown (struct usb_serial *serial);
266 extern int usb_serial_generic_register (int debug);
267 extern void usb_serial_generic_deregister (void);
269 extern int usb_serial_bus_register (struct usb_serial_driver *device);
270 extern void usb_serial_bus_deregister (struct usb_serial_driver *device);
272 extern struct usb_serial_driver usb_serial_generic_device;
273 extern struct bus_type usb_serial_bus_type;
274 extern struct tty_driver *usb_serial_tty_driver;
276 static inline void usb_serial_debug_data(int debug,
278 const char *function, int size,
279 const unsigned char *data)
284 dev_printk(KERN_DEBUG, dev, "%s - length = %d, data = ", function, size);
285 for (i = 0; i < size; ++i)
286 printk ("%.2x ", data[i]);
291 /* Use our own dbg macro */
293 #define dbg(format, arg...) do { if (debug) printk(KERN_DEBUG "%s: " format "\n" , __FILE__ , ## arg); } while (0)
297 #endif /* ifdef __LINUX_USB_SERIAL_H */