summaryrefslogtreecommitdiffstats
path: root/include/linux/usb/serial.h
blob: 8cdfed738fe4b8b28d0f7208c8553f0cf2eaee03 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
/*
 * USB Serial Converter stuff
 *
 *	Copyright (C) 1999 - 2005
 *	    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; version 2 of the License.
 *
 */

#ifndef __LINUX_USB_SERIAL_H
#define __LINUX_USB_SERIAL_H

#include <linux/kref.h>
#include <linux/mutex.h>

#define SERIAL_TTY_MAJOR	188	/* Nice legal number now */
#define SERIAL_TTY_MINORS	254	/* loads of devices :) */
#define SERIAL_TTY_NO_MINOR	255	/* No minor was assigned */

/* The maximum number of ports one device can grab at once */
#define MAX_NUM_PORTS		8

/* parity check flag */
#define RELEVANT_IFLAG(iflag)	(iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))

/**
 * usb_serial_port: structure for the specific ports of a device.
 * @serial: pointer back to the struct usb_serial owner of this port.
 * @port: pointer to the corresponding tty_port for this port.
 * @lock: spinlock to grab when updating portions of this structure.
 * @mutex: mutex used to synchronize serial_open() and serial_close()
 *	access 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.
 * @interrupt_out_buffer: pointer to the interrupt out buffer for this port.
 * @interrupt_out_size: the size of the interrupt_out_buffer, in bytes.
 * @interrupt_out_urb: pointer to the interrupt out struct urb for this port.
 * @interrupt_out_endpointAddress: endpoint address for the interrupt out pipe
 * 	for this port.
 * @bulk_in_buffer: pointer to the bulk in buffer for this port.
 * @bulk_in_size: the size of the bulk_in_buffer, in bytes.
 * @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.
 * @write_urb_busy: port`s writing status
 * @bulk_out_endpointAddress: endpoint address for the bulk out pipe for this
 *	port.
 * @write_wait: a wait_queue_head_t used by the port.
 * @work: work queue entry for the line discipline waking up.
 * @throttled: nonzero if the read urb is inactive to throttle the device
 * @throttle_req: nonzero if the tty wants to throttle us
 * @console: attached usb serial console
 * @dev: pointer to the serial device
 *
 * This structure is used by the usb-serial core and drivers for the specific
 * ports of a device.
 */
struct usb_serial_port {
	struct usb_serial	*serial;
	struct tty_port		port;
	spinlock_t		lock;
	struct mutex            mutex;
	unsigned char		number;

	unsigned char		*interrupt_in_buffer;
	struct urb		*interrupt_in_urb;
	__u8			interrupt_in_endpointAddress;

	unsigned char		*interrupt_out_buffer;
	int			interrupt_out_size;
	struct urb		*interrupt_out_urb;
	__u8			interrupt_out_endpointAddress;

	unsigned char		*bulk_in_buffer;
	int			bulk_in_size;
	struct urb		*read_urb;
	__u8			bulk_in_endpointAddress;

	unsigned char		*bulk_out_buffer;
	int			bulk_out_size;
	struct urb		*write_urb;
	int			write_urb_busy;
	__u8			bulk_out_endpointAddress;

	wait_queue_head_t	write_wait;
	struct work_struct	work;
	char			throttled;
	char			throttle_req;
	char			console;
	struct device		dev;
};
#define to_usb_serial_port(d) container_of(d, struct usb_serial_port, dev)

/* get and set the port private data pointer helper functions */
static inline void *usb_get_serial_port_data(struct usb_serial_port *port)
{
	return dev_get_drvdata(&port->dev);
}

static inline void usb_set_serial_port_data(struct usb_serial_port *port,
					    void *data)
{
	dev_set_drvdata(&port->dev, data);
}

/**
 * usb_serial - structure used by the usb-serial core for a device
 * @dev: pointer to the struct usb_device for this device
 * @type: pointer to the struct usb_serial_driver 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_interrupt_out: number of interrupt out endpoints we have
 * @num_bulk_in: number of bulk in endpoints we have
 * @num_bulk_out: number of bulk out endpoints we have
 * @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.  Use usb_get_serial_data() and
 *	usb_set_serial_data() to access this.
 */
struct usb_serial {
	struct usb_device		*dev;
	struct usb_serial_driver	*type;
	struct usb_interface		*interface;
	unsigned char			disconnected:1;
	unsigned char			suspending:1;
	unsigned char			minor;
	unsigned char			num_ports;
	unsigned char			num_port_pointers;
	char				num_interrupt_in;
	char				num_interrupt_out;
	char				num_bulk_in;
	char				num_bulk_out;
	struct usb_serial_port		*port[MAX_NUM_PORTS];
	struct kref			kref;
	struct mutex			disc_mutex;
	void				*private;
};
#define to_usb_serial(d) container_of(d, struct usb_serial, kref)

/* get and set the serial private data pointer helper functions */
static inline void *usb_get_serial_data(struct usb_serial *serial)
{
	return serial->private;
}

static inline void usb_set_serial_data(struct usb_serial *serial, void *data)
{
	serial->private = data;
}

/**
 * usb_serial_driver - describes a usb serial driver
 * @description: pointer to a string that describes this driver.  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_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()
 * @probe: pointer to the driver's probe 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.
 * @attach: pointer to the driver's attach function.
 *	This will be called when the struct usb_serial structure is fully set
 *	set up.  Do any local initialization of the device, or any private
 *	memory structure allocation at this point in time.
 * @shutdown: pointer to the driver's shutdown function.  This will be
 *	called when the device is removed from the system.
 * @usb_driver: pointer to the struct usb_driver that controls this
 *	device.  This is necessary to allow dynamic ids to be added to
 *	the driver from sysfs.
 *
 * This structure is defines a USB Serial driver.  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.
 *
 * The driver.owner field should be set to the module owner of this driver.
 * The driver.name field should be set to the name of this driver (remember
 * it will show up in sysfs, so it needs to be short and to the point.
 * Using the module name is a good idea.)
 */
struct usb_serial_driver {
	const char *description;
	const struct usb_device_id *id_table;
	char	num_ports;

	struct list_head	driver_list;
	struct device_driver	driver;
	struct usb_driver	*usb_driver;
	struct usb_dynids	dynids;

	int (*probe)(struct usb_serial *serial, const struct usb_device_id *id);
	int (*attach)(struct usb_serial *serial);
	int (*calc_num_ports) (struct usb_serial *serial);

	void (*shutdown)(struct usb_serial *serial);

	int (*port_probe)(struct usb_serial_port *port);
	int (*port_remove)(struct usb_serial_port *port);

	int (*suspend)(struct usb_serial *serial, pm_message_t message);
	int (*resume)(struct usb_serial *serial);

	/* serial function calls */
	/* Called by console with tty = NULL and by tty */
	int  (*open)(struct tty_struct *tty,
			struct usb_serial_port *port, struct file *filp);
	void (*close)(struct usb_serial_port *port);
	int  (*write)(struct tty_struct *tty, struct usb_serial_port *port,
			const unsigned char *buf, int count);
	/* Called only by the tty layer */
	int  (*write_room)(struct tty_struct *tty);
	int  (*ioctl)(struct tty_struct *tty, struct file *file,
		      unsigned int cmd, unsigned long arg);
	void (*set_termios)(struct tty_struct *tty,
			struct usb_serial_port *port, struct ktermios *old);
	void (*break_ctl)(struct tty_struct *tty, int break_state);
	int  (*chars_in_buffer)(struct tty_struct *tty);
	void (*throttle)(struct tty_struct *tty);
	void (*unthrottle)(struct tty_struct *tty);
	int  (*tiocmget)(struct tty_struct *tty, struct file *file);
	int  (*tiocmset)(struct tty_struct *tty, struct file *file,
			 unsigned int set, unsigned int clear);
	/* Called by the tty layer for port level work. There may or may not
	   be an attached tty at this point */
	void (*dtr_rts)(struct usb_serial_port *port, int on);
	int  (*carrier_raised)(struct usb_serial_port *port);
	/* USB events */
	void (*read_int_callback)(struct urb *urb);
	void (*write_int_callback)(struct urb *urb);
	void (*read_bulk_callback)(struct urb *urb);
	void (*write_bulk_callback)(struct urb *urb);
};
#define to_usb_serial_driver(d) \
	container_of(d, struct usb_serial_driver, driver)

extern int  usb_serial_register(struct usb_serial_driver *driver);
extern void usb_serial_deregister(struct usb_serial_driver *driver);
extern void usb_serial_port_softint(struct usb_serial_port *port);

extern int usb_serial_probe(struct usb_interface *iface,
			    const struct usb_device_id *id);
extern void usb_serial_disconnect(struct usb_interface *iface);

extern int usb_serial_suspend(struct usb_interface *intf, pm_message_t message);
extern int usb_serial_resume(struct usb_interface *intf);

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);

/* USB Serial console functions */
#ifdef CONFIG_USB_SERIAL_CONSOLE
extern void usb_serial_console_init(int debug, int minor);
extern void usb_serial_console_exit(void);
extern void usb_serial_console_disconnect(struct usb_serial *serial);
#else
static inline void usb_serial_console_init(int debug, int minor) { }
static inline void usb_serial_console_exit(void) { }
static inline void usb_serial_console_disconnect(struct usb_serial *serial) {}
#endif

/* Functions needed by other parts of the usbserial core */
extern struct usb_serial *usb_serial_get_by_index(unsigned int minor);
extern void usb_serial_put(struct usb_serial *serial);
extern int usb_serial_generic_open(struct tty_struct *tty,
		struct usb_serial_port *port, struct file *filp);
extern int usb_serial_generic_write(struct tty_struct *tty,
	struct usb_serial_port *port, const unsigned char *buf, int count);
extern void usb_serial_generic_close(struct usb_serial_port *port);
extern int usb_serial_generic_resume(struct usb_serial *serial);
extern int usb_serial_generic_write_room(struct tty_struct *tty);
extern int usb_serial_generic_chars_in_buffer(struct tty_struct *tty);
extern void usb_serial_generic_read_bulk_callback(struct urb *urb);
extern void usb_serial_generic_write_bulk_callback(struct urb *urb);
extern void usb_serial_generic_throttle(struct tty_struct *tty);
extern void usb_serial_generic_unthrottle(struct tty_struct *tty);
extern void usb_serial_generic_shutdown(struct usb_serial *serial);
extern int usb_serial_generic_register(int debug);
extern void usb_serial_generic_deregister(void);

extern int usb_serial_bus_register(struct usb_serial_driver *device);
extern void usb_serial_bus_deregister(struct usb_serial_driver *device);

extern struct usb_serial_driver usb_serial_generic_device;
extern struct bus_type usb_serial_bus_type;
extern struct tty_driver *usb_serial_tty_driver;

static inline void usb_serial_debug_data(int debug,
					 struct device *dev,
					 const char *function, int size,
					 const unsigned char *data)
{
	int i;

	if (debug) {
		dev_printk(KERN_DEBUG, dev, "%s - length = %d, data = ",
			   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 "%s: " format "\n" , __FILE__ , \
				## arg); \
	} while (0)



#endif /* __LINUX_USB_SERIAL_H */

OpenPOWER on IntegriCloud