#include <linux/kref.h>
#include <linux/mutex.h>
+#include <linux/sysrq.h>
#define SERIAL_TTY_MAJOR 188 /* Nice legal number now */
#define SERIAL_TTY_MINORS 254 /* loads of devices :) */
/* parity check flag */
#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
+enum port_dev_state {
+ PORT_UNREGISTERED,
+ PORT_REGISTERING,
+ PORT_REGISTERED,
+ PORT_UNREGISTERING,
+};
+
/**
* 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.
+ * @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_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_fifo: kfifo used to buffer outgoing data
+ * @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.
- * @open_count: number of times this port has been opened.
* @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 *serial;
struct tty_port port;
spinlock_t lock;
- struct mutex mutex;
unsigned char number;
unsigned char *interrupt_in_buffer;
unsigned char *bulk_out_buffer;
int bulk_out_size;
struct urb *write_urb;
+ struct kfifo *write_fifo;
int write_urb_busy;
__u8 bulk_out_endpointAddress;
+ int tx_bytes_flight;
+ int urbs_in_flight;
+
wait_queue_head_t write_wait;
struct work_struct work;
char throttled;
char throttle_req;
char console;
+ unsigned long sysrq; /* sysrq timeout */
struct device dev;
+ enum port_dev_state dev_state;
};
#define to_usb_serial_port(d) container_of(d, struct usb_serial_port, dev)
struct usb_device *dev;
struct usb_serial_driver *type;
struct usb_interface *interface;
- unsigned char disconnected;
+ unsigned char disconnected:1;
+ unsigned char suspending:1;
+ unsigned char attached:1;
unsigned char minor;
unsigned char num_ports;
unsigned char num_port_pointers;
* 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.
+ * @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.
struct device_driver driver;
struct usb_driver *usb_driver;
struct usb_dynids dynids;
+ int max_in_flight_urbs;
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);
+ 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 (*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 tty_struct *tty,
- struct usb_serial_port *port, struct file *filp);
+ /* 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 (*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);
+ /* 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);
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);
+ struct usb_serial_port *port);
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 tty_struct *tty,
- struct usb_serial_port *port, struct file *filp);
+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_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 void usb_serial_generic_disconnect(struct usb_serial *serial);
+extern void usb_serial_generic_release(struct usb_serial *serial);
extern int usb_serial_generic_register(int debug);
extern void usb_serial_generic_deregister(void);
+extern void usb_serial_generic_resubmit_read_urb(struct usb_serial_port *port,
+ gfp_t mem_flags);
+extern int usb_serial_handle_sysrq_char(struct tty_struct *tty,
+ struct usb_serial_port *port,
+ unsigned int ch);
+extern int usb_serial_handle_break(struct usb_serial_port *port);
+
extern int usb_serial_bus_register(struct usb_serial_driver *device);
extern void usb_serial_bus_deregister(struct usb_serial_driver *device);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff