diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/usb/serial.h | 300 |
1 files changed, 300 insertions, 0 deletions
diff --git a/include/linux/usb/serial.h b/include/linux/usb/serial.h new file mode 100644 index 00000000000..91c983eef89 --- /dev/null +++ b/include/linux/usb/serial.h @@ -0,0 +1,300 @@ +/* + * 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 255 /* loads of devices :) */ + +#define MAX_NUM_PORTS 8 /* The maximum number of ports one device can grab at once */ + +/* 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. + * @tty: pointer to the corresponding tty 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. + * @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. + * @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. + * @open_count: number of times this port has been opened. + * + * 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_struct * tty; + 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; + int open_count; + 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 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; + void * private; +}; +#define to_usb_serial(d) container_of(d, struct usb_serial, kref) + +#define NUM_DONT_CARE (-1) + +/* 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_interrupt_in: the number of interrupt in endpoints this device will + * have. + * @num_interrupt_out: the number of interrupt out endpoints this device will + * have. + * @num_bulk_in: the number of bulk in endpoints this device will have. + * @num_bulk_out: the number of bulk out endpoints this device will have. + * @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. + * + * 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. + * Useing the module name is a good idea.) + */ +struct usb_serial_driver { + const char *description; + const struct usb_device_id *id_table; + char num_interrupt_in; + char num_interrupt_out; + char num_bulk_in; + char num_bulk_out; + char num_ports; + + struct list_head driver_list; + struct device_driver driver; + + 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); + + /* serial function calls */ + int (*open) (struct usb_serial_port *port, struct file * filp); + void (*close) (struct usb_serial_port *port, struct file * filp); + int (*write) (struct usb_serial_port *port, const unsigned char *buf, int count); + int (*write_room) (struct usb_serial_port *port); + int (*ioctl) (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg); + void (*set_termios) (struct usb_serial_port *port, struct termios * old); + void (*break_ctl) (struct usb_serial_port *port, int break_state); + int (*chars_in_buffer) (struct usb_serial_port *port); + void (*throttle) (struct usb_serial_port *port); + void (*unthrottle) (struct usb_serial_port *port); + int (*tiocmget) (struct usb_serial_port *port, struct file *file); + int (*tiocmset) (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear); + + void (*read_int_callback)(struct urb *urb, struct pt_regs *regs); + void (*write_int_callback)(struct urb *urb, struct pt_regs *regs); + void (*read_bulk_callback)(struct urb *urb, struct pt_regs *regs); + void (*write_bulk_callback)(struct urb *urb, struct pt_regs *regs); +}; +#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 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 usb_serial_port *port, struct file *filp); +extern int usb_serial_generic_write (struct usb_serial_port *port, const unsigned char *buf, int count); +extern void usb_serial_generic_close (struct usb_serial_port *port, struct file *filp); +extern int usb_serial_generic_write_room (struct usb_serial_port *port); +extern int usb_serial_generic_chars_in_buffer (struct usb_serial_port *port); +extern void usb_serial_generic_read_bulk_callback (struct urb *urb, struct pt_regs *regs); +extern void usb_serial_generic_write_bulk_callback (struct urb *urb, struct pt_regs *regs); +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 /* ifdef __LINUX_USB_SERIAL_H */ + |