*
*/
-
#ifndef __LINUX_USB_SERIAL_H
#define __LINUX_USB_SERIAL_H
#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 255 /* loads of devices :) */
+#define SERIAL_TTY_MINORS 254 /* loads of devices :) */
+#define SERIAL_TTY_NO_MINOR 255 /* No minor was assigned */
-#define MAX_NUM_PORTS 8 /* The maximum number of ports one device can grab at once */
+/* 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))
+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_port {
- struct usb_serial * serial;
- struct tty_struct * tty;
+ 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;
+ unsigned char *interrupt_in_buffer;
+ struct urb *interrupt_in_urb;
__u8 interrupt_in_endpointAddress;
- unsigned char * interrupt_out_buffer;
+ unsigned char *interrupt_out_buffer;
int interrupt_out_size;
- struct urb * interrupt_out_urb;
+ struct urb *interrupt_out_urb;
__u8 interrupt_out_endpointAddress;
- unsigned char * bulk_in_buffer;
+ unsigned char *bulk_in_buffer;
int bulk_in_size;
- struct urb * read_urb;
+ struct urb *read_urb;
__u8 bulk_in_endpointAddress;
- unsigned char * bulk_out_buffer;
+ unsigned char *bulk_out_buffer;
int bulk_out_size;
- struct urb * write_urb;
+ 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;
- int open_count;
+ 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)
/* get and set the port private data pointer helper functions */
-static inline void *usb_get_serial_port_data (struct usb_serial_port *port)
+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)
+static inline void usb_set_serial_port_data(struct usb_serial_port *port,
+ void *data)
{
dev_set_drvdata(&port->dev, data);
}
* usb_set_serial_data() to access this.
*/
struct usb_serial {
- struct usb_device * dev;
- struct usb_serial_driver * type;
- struct usb_interface * interface;
+ 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 minor;
unsigned char num_ports;
unsigned char num_port_pointers;
char num_interrupt_out;
char num_bulk_in;
char num_bulk_out;
- struct usb_serial_port * port[MAX_NUM_PORTS];
+ struct usb_serial_port *port[MAX_NUM_PORTS];
struct kref kref;
- void * private;
+ struct mutex disc_mutex;
+ 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)
+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)
+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.
+ * @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()
* 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.
*
* This structure is defines a USB Serial driver. It provides all of
* the information that the USB serial core code needs. If the function
* 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.)
+ * Using 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;
+ 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 (*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 (*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 */
- 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);
+ /* 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, 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);
+ /* 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);
};
-#define to_usb_serial_driver(d) container_of(d, struct usb_serial_driver, driver)
+#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 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);
+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_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_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 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 int usb_serial_generic_open(struct tty_struct *tty,
+ 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 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_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);
extern struct usb_serial_driver usb_serial_generic_device;
extern struct bus_type usb_serial_bus_type;
int i;
if (debug) {
- dev_printk(KERN_DEBUG, dev, "%s - length = %d, data = ", function, size);
+ dev_printk(KERN_DEBUG, dev, "%s - length = %d, data = ",
+ function, size);
for (i = 0; i < size; ++i)
- printk ("%.2x ", data[i]);
- printk ("\n");
+ 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)
+#define dbg(format, arg...) \
+ do { \
+ if (debug) \
+ printk(KERN_DEBUG "%s: " format "\n" , __FILE__ , \
+ ## arg); \
+ } while (0)
-#endif /* ifdef __LINUX_USB_SERIAL_H */
+#endif /* __LINUX_USB_SERIAL_H */
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