416 строки
16 KiB
C
416 строки
16 KiB
C
/*
|
|
* USB Serial Converter stuff
|
|
*
|
|
* Copyright (C) 1999 - 2012
|
|
* 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>
|
|
#include <linux/serial.h>
|
|
#include <linux/sysrq.h>
|
|
#include <linux/kfifo.h>
|
|
|
|
/* 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 flags */
|
|
#define USB_SERIAL_WRITE_BUSY 0
|
|
|
|
/**
|
|
* 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.
|
|
* @minor: the minor number of the port
|
|
* @port_number: the struct usb_serial port number of this port (starts at 0)
|
|
* @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_in_buffers: pointers to the bulk in buffers for this port
|
|
* @read_urbs: pointers to the bulk in urbs for this port
|
|
* @read_urbs_free: status bitmap the for bulk in urbs
|
|
* @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_fifo: kfifo used to buffer outgoing data
|
|
* @bulk_out_buffers: pointers to the bulk out buffers for this port
|
|
* @write_urbs: pointers to the bulk out urbs for this port
|
|
* @write_urbs_free: status bitmap the for bulk out urbs
|
|
* @icount: interrupt counters
|
|
* @tx_bytes: number of bytes currently in host stack queues
|
|
* @bulk_out_endpointAddress: endpoint address for the bulk out pipe for this
|
|
* port.
|
|
* @flags: usb serial port flags
|
|
* @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
|
|
* @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;
|
|
u32 minor;
|
|
u8 port_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_in_buffers[2];
|
|
struct urb *read_urbs[2];
|
|
unsigned long read_urbs_free;
|
|
|
|
unsigned char *bulk_out_buffer;
|
|
int bulk_out_size;
|
|
struct urb *write_urb;
|
|
struct kfifo write_fifo;
|
|
|
|
unsigned char *bulk_out_buffers[2];
|
|
struct urb *write_urbs[2];
|
|
unsigned long write_urbs_free;
|
|
__u8 bulk_out_endpointAddress;
|
|
|
|
struct async_icount icount;
|
|
int tx_bytes;
|
|
|
|
unsigned long flags;
|
|
wait_queue_head_t write_wait;
|
|
struct work_struct work;
|
|
char throttled;
|
|
char throttle_req;
|
|
unsigned long sysrq; /* sysrq timeout */
|
|
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
|
|
* @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 attached:1;
|
|
unsigned char minors_reserved:1;
|
|
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.
|
|
* @bulk_in_size: minimum number of bytes to allocate for bulk-in buffer
|
|
* (0 = end-point size)
|
|
* @bulk_out_size: minimum number of bytes to allocate for bulk-out buffer
|
|
* (0 = end-point size)
|
|
* @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.
|
|
* @disconnect: pointer to the driver's disconnect function. This will be
|
|
* called when the device is unplugged or unbound from the driver.
|
|
* @release: pointer to the driver's release function. This will be called
|
|
* when the usb_serial data structure is about to be destroyed.
|
|
* @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;
|
|
|
|
size_t bulk_in_size;
|
|
size_t bulk_out_size;
|
|
|
|
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 (*disconnect)(struct usb_serial *serial);
|
|
void (*release)(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);
|
|
int (*reset_resume)(struct usb_serial *serial);
|
|
|
|
/* serial function calls */
|
|
/* Called by console and by the tty layer */
|
|
int (*open)(struct tty_struct *tty, struct usb_serial_port *port);
|
|
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,
|
|
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 (*wait_until_sent)(struct tty_struct *tty, long timeout);
|
|
bool (*tx_empty)(struct usb_serial_port *port);
|
|
void (*throttle)(struct tty_struct *tty);
|
|
void (*unthrottle)(struct tty_struct *tty);
|
|
int (*tiocmget)(struct tty_struct *tty);
|
|
int (*tiocmset)(struct tty_struct *tty,
|
|
unsigned int set, unsigned int clear);
|
|
int (*tiocmiwait)(struct tty_struct *tty, unsigned long arg);
|
|
int (*get_icount)(struct tty_struct *tty,
|
|
struct serial_icounter_struct *icount);
|
|
/* 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);
|
|
/* Called by the usb serial hooks to allow the user to rework the
|
|
termios state */
|
|
void (*init_termios)(struct tty_struct *tty);
|
|
/* 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);
|
|
/* Called by the generic read bulk callback */
|
|
void (*process_read_urb)(struct urb *urb);
|
|
/* Called by the generic write implementation */
|
|
int (*prepare_write_buffer)(struct usb_serial_port *port,
|
|
void *dest, size_t size);
|
|
};
|
|
#define to_usb_serial_driver(d) \
|
|
container_of(d, struct usb_serial_driver, driver)
|
|
|
|
extern int usb_serial_register_drivers(struct usb_serial_driver *const serial_drivers[],
|
|
const char *name, const struct usb_device_id *id_table);
|
|
extern void usb_serial_deregister_drivers(struct usb_serial_driver *const serial_drivers[]);
|
|
extern void usb_serial_port_softint(struct usb_serial_port *port);
|
|
|
|
extern int usb_serial_suspend(struct usb_interface *intf, pm_message_t message);
|
|
extern int usb_serial_resume(struct usb_interface *intf);
|
|
|
|
/* USB Serial console functions */
|
|
#ifdef CONFIG_USB_SERIAL_CONSOLE
|
|
extern void usb_serial_console_init(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 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_port *usb_serial_port_get_by_minor(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);
|
|
extern int usb_serial_generic_write_start(struct usb_serial_port *port,
|
|
gfp_t mem_flags);
|
|
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_wait_until_sent(struct tty_struct *tty,
|
|
long timeout);
|
|
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 int usb_serial_generic_tiocmiwait(struct tty_struct *tty,
|
|
unsigned long arg);
|
|
extern int usb_serial_generic_get_icount(struct tty_struct *tty,
|
|
struct serial_icounter_struct *icount);
|
|
extern int usb_serial_generic_register(void);
|
|
extern void usb_serial_generic_deregister(void);
|
|
extern int usb_serial_generic_submit_read_urbs(struct usb_serial_port *port,
|
|
gfp_t mem_flags);
|
|
extern void usb_serial_generic_process_read_urb(struct urb *urb);
|
|
extern int usb_serial_generic_prepare_write_buffer(struct usb_serial_port *port,
|
|
void *dest, size_t size);
|
|
extern int usb_serial_handle_sysrq_char(struct usb_serial_port *port,
|
|
unsigned int ch);
|
|
extern int usb_serial_handle_break(struct usb_serial_port *port);
|
|
extern void usb_serial_handle_dcd_change(struct usb_serial_port *usb_port,
|
|
struct tty_struct *tty,
|
|
unsigned int status);
|
|
|
|
|
|
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(struct device *dev,
|
|
const char *function, int size,
|
|
const unsigned char *data)
|
|
{
|
|
dev_dbg(dev, "%s - length = %d, data = %*ph\n",
|
|
function, size, size, data);
|
|
}
|
|
|
|
/*
|
|
* Macro for reporting errors in write path to avoid inifinite loop
|
|
* when port is used as a console.
|
|
*/
|
|
#define dev_err_console(usport, fmt, ...) \
|
|
do { \
|
|
static bool __print_once; \
|
|
struct usb_serial_port *__port = (usport); \
|
|
\
|
|
if (!__port->port.console || !__print_once) { \
|
|
__print_once = true; \
|
|
dev_err(&__port->dev, fmt, ##__VA_ARGS__); \
|
|
} \
|
|
} while (0)
|
|
|
|
/*
|
|
* module_usb_serial_driver() - Helper macro for registering a USB Serial driver
|
|
* @__serial_drivers: list of usb_serial drivers to register
|
|
* @__ids: all device ids that @__serial_drivers bind to
|
|
*
|
|
* Helper macro for USB serial drivers which do not do anything special
|
|
* in module init/exit. This eliminates a lot of boilerplate. Each
|
|
* module may only use this macro once, and calling it replaces
|
|
* module_init() and module_exit()
|
|
*
|
|
*/
|
|
#define usb_serial_module_driver(__name, __serial_drivers, __ids) \
|
|
static int __init usb_serial_module_init(void) \
|
|
{ \
|
|
return usb_serial_register_drivers(__serial_drivers, \
|
|
__name, __ids); \
|
|
} \
|
|
module_init(usb_serial_module_init); \
|
|
static void __exit usb_serial_module_exit(void) \
|
|
{ \
|
|
usb_serial_deregister_drivers(__serial_drivers); \
|
|
} \
|
|
module_exit(usb_serial_module_exit);
|
|
|
|
#define module_usb_serial_driver(__serial_drivers, __ids) \
|
|
usb_serial_module_driver(KBUILD_MODNAME, __serial_drivers, __ids)
|
|
|
|
#endif /* __LINUX_USB_SERIAL_H */
|
|
|