include/linux/usb/serial.h

   1 /*
   2  * USB Serial Converter stuff
   3  *
   4  *      Copyright (C) 1999 - 2005
   5  *          Greg Kroah-Hartman (greg@kroah.com)
   6  *
   7  *      This program is free software; you can redistribute it and/or modify
   8  *      it under the terms of the GNU General Public License as published by
   9  *      the Free Software Foundation; version 2 of the License.
  10  *
  11  */
  12
  13
  14 #ifndef __LINUX_USB_SERIAL_H
  15 #define __LINUX_USB_SERIAL_H
  16
  17 #include <linux/kref.h>
  18 #include <linux/mutex.h>
  19
  20 #define SERIAL_TTY_MAJOR        188     /* Nice legal number now */
  21 #define SERIAL_TTY_MINORS       255     /* loads of devices :) */
  22
  23 #define MAX_NUM_PORTS           8       /* The maximum number of ports one device can grab at once */
  24
  25 /* parity check flag */
  26 #define RELEVANT_IFLAG(iflag)   (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
  27
  28 /**
  29  * usb_serial_port: structure for the specific ports of a device.
  30  * @serial: pointer back to the struct usb_serial owner of this port.
  31  * @tty: pointer to the corresponding tty for this port.
  32  * @lock: spinlock to grab when updating portions of this structure.
  33  * @mutex: mutex used to synchronize serial_open() and serial_close()
  34  *      access for this port.
  35  * @number: the number of the port (the minor number).
  36  * @interrupt_in_buffer: pointer to the interrupt in buffer for this port.
  37  * @interrupt_in_urb: pointer to the interrupt in struct urb for this port.
  38  * @interrupt_in_endpointAddress: endpoint address for the interrupt in pipe
  39  *      for this port.
  40  * @interrupt_out_buffer: pointer to the interrupt out buffer for this port.
  41  * @interrupt_out_size: the size of the interrupt_out_buffer, in bytes.
  42  * @interrupt_out_urb: pointer to the interrupt out struct urb for this port.
  43  * @interrupt_out_endpointAddress: endpoint address for the interrupt out pipe
  44  *      for this port.
  45  * @bulk_in_buffer: pointer to the bulk in buffer for this port.
  46  * @read_urb: pointer to the bulk in struct urb for this port.
  47  * @bulk_in_endpointAddress: endpoint address for the bulk in pipe for this
  48  *      port.
  49  * @bulk_out_buffer: pointer to the bulk out buffer for this port.
  50  * @bulk_out_size: the size of the bulk_out_buffer, in bytes.
  51  * @write_urb: pointer to the bulk out struct urb for this port.
  52  * @bulk_out_endpointAddress: endpoint address for the bulk out pipe for this
  53  *      port.
  54  * @write_wait: a wait_queue_head_t used by the port.
  55  * @work: work queue entry for the line discipline waking up.
  56  * @open_count: number of times this port has been opened.
  57  * @throttled: nonzero if the read urb is inactive to throttle the device
  58  * @throttle_req: nonzero if the tty wants to throttle us
  59  *
  60  * This structure is used by the usb-serial core and drivers for the specific
  61  * ports of a device.
  62  */
  63 struct usb_serial_port {
  64         struct usb_serial *     serial;
  65         struct tty_struct *     tty;
  66         spinlock_t              lock;
  67         struct mutex            mutex;
  68         unsigned char           number;
  69
  70         unsigned char *         interrupt_in_buffer;
  71         struct urb *            interrupt_in_urb;
  72         __u8                    interrupt_in_endpointAddress;
  73
  74         unsigned char *         interrupt_out_buffer;
  75         int                     interrupt_out_size;
  76         struct urb *            interrupt_out_urb;
  77         __u8                    interrupt_out_endpointAddress;
  78
  79         unsigned char *         bulk_in_buffer;
  80         int                     bulk_in_size;
  81         struct urb *            read_urb;
  82         __u8                    bulk_in_endpointAddress;
  83
  84         unsigned char *         bulk_out_buffer;
  85         int                     bulk_out_size;
  86         struct urb *            write_urb;
  87         int                     write_urb_busy;
  88         __u8                    bulk_out_endpointAddress;
  89
  90         wait_queue_head_t       write_wait;
  91         struct work_struct      work;
  92         int                     open_count;
  93         char                    throttled;
  94         char                    throttle_req;
  95         struct device           dev;
  96 };
  97 #define to_usb_serial_port(d) container_of(d, struct usb_serial_port, dev)
  98
  99 /* get and set the port private data pointer helper functions */
 100 static inline void *usb_get_serial_port_data (struct usb_serial_port *port)
 101 {
 102         return dev_get_drvdata(&port->dev);
 103 }
 104
 105 static inline void usb_set_serial_port_data (struct usb_serial_port *port, void *data)
 106 {
 107         dev_set_drvdata(&port->dev, data);
 108 }
 109
 110 /**
 111  * usb_serial - structure used by the usb-serial core for a device
 112  * @dev: pointer to the struct usb_device for this device
 113  * @type: pointer to the struct usb_serial_driver for this device
 114  * @interface: pointer to the struct usb_interface for this device
 115  * @minor: the starting minor number for this device
 116  * @num_ports: the number of ports this device has
 117  * @num_interrupt_in: number of interrupt in endpoints we have
 118  * @num_interrupt_out: number of interrupt out endpoints we have
 119  * @num_bulk_in: number of bulk in endpoints we have
 120  * @num_bulk_out: number of bulk out endpoints we have
 121  * @port: array of struct usb_serial_port structures for the different ports.
 122  * @private: place to put any driver specific information that is needed.  The
 123  *      usb-serial driver is required to manage this data, the usb-serial core
 124  *      will not touch this.  Use usb_get_serial_data() and
 125  *      usb_set_serial_data() to access this.
 126  */
 127 struct usb_serial {
 128         struct usb_device *             dev;
 129         struct usb_serial_driver *      type;
 130         struct usb_interface *          interface;
 131         unsigned char                   minor;
 132         unsigned char                   num_ports;
 133         unsigned char                   num_port_pointers;
 134         char                            num_interrupt_in;
 135         char                            num_interrupt_out;
 136         char                            num_bulk_in;
 137         char                            num_bulk_out;
 138         struct usb_serial_port *        port[MAX_NUM_PORTS];
 139         struct kref                     kref;
 140         void *                          private;
 141 };
 142 #define to_usb_serial(d) container_of(d, struct usb_serial, kref)
 143
 144 #define NUM_DONT_CARE   (-1)
 145
 146 /* get and set the serial private data pointer helper functions */
 147 static inline void *usb_get_serial_data (struct usb_serial *serial)
 148 {
 149         return serial->private;
 150 }
 151
 152 static inline void usb_set_serial_data (struct usb_serial *serial, void *data)
 153 {
 154         serial->private = data;
 155 }
 156
 157 /**
 158  * usb_serial_driver - describes a usb serial driver
 159  * @description: pointer to a string that describes this driver.  This string used
 160  *      in the syslog messages when a device is inserted or removed.
 161  * @id_table: pointer to a list of usb_device_id structures that define all
 162  *      of the devices this structure can support.
 163  * @num_interrupt_in: the number of interrupt in endpoints this device will
 164  *      have.
 165  * @num_interrupt_out: the number of interrupt out endpoints this device will
 166  *      have.
 167  * @num_bulk_in: the number of bulk in endpoints this device will have.
 168  * @num_bulk_out: the number of bulk out endpoints this device will have.
 169  * @num_ports: the number of different ports this device will have.
 170  * @calc_num_ports: pointer to a function to determine how many ports this
 171  *      device has dynamically.  It will be called after the probe()
 172  *      callback is called, but before attach()
 173  * @probe: pointer to the driver's probe function.
 174  *      This will be called when the device is inserted into the system,
 175  *      but before the device has been fully initialized by the usb_serial
 176  *      subsystem.  Use this function to download any firmware to the device,
 177  *      or any other early initialization that might be needed.
 178  *      Return 0 to continue on with the initialization sequence.  Anything
 179  *      else will abort it.
 180  * @attach: pointer to the driver's attach function.
 181  *      This will be called when the struct usb_serial structure is fully set
 182  *      set up.  Do any local initialization of the device, or any private
 183  *      memory structure allocation at this point in time.
 184  * @shutdown: pointer to the driver's shutdown function.  This will be
 185  *      called when the device is removed from the system.
 186  * @usb_driver: pointer to the struct usb_driver that controls this
 187  *      device.  This is necessary to allow dynamic ids to be added to
 188  *      the driver from sysfs.
 189  *
 190  * This structure is defines a USB Serial driver.  It provides all of
 191  * the information that the USB serial core code needs.  If the function
 192  * pointers are defined, then the USB serial core code will call them when
 193  * the corresponding tty port functions are called.  If they are not
 194  * called, the generic serial function will be used instead.
 195  *
 196  * The driver.owner field should be set to the module owner of this driver.
 197  * The driver.name field should be set to the name of this driver (remember
 198  * it will show up in sysfs, so it needs to be short and to the point.
 199  * Useing the module name is a good idea.)
 200  */
 201 struct usb_serial_driver {
 202         const char *description;
 203         const struct usb_device_id *id_table;
 204         char    num_interrupt_in;
 205         char    num_interrupt_out;
 206         char    num_bulk_in;
 207         char    num_bulk_out;
 208         char    num_ports;
 209
 210         struct list_head        driver_list;
 211         struct device_driver    driver;
 212         struct usb_driver       *usb_driver;
 213         struct usb_dynids       dynids;
 214
 215         int (*probe) (struct usb_serial *serial, const struct usb_device_id *id);
 216         int (*attach) (struct usb_serial *serial);
 217         int (*calc_num_ports) (struct usb_serial *serial);
 218
 219         void (*shutdown) (struct usb_serial *serial);
 220
 221         int (*port_probe) (struct usb_serial_port *port);
 222         int (*port_remove) (struct usb_serial_port *port);
 223
 224         /* serial function calls */
 225         int  (*open)            (struct usb_serial_port *port, struct file * filp);
 226         void (*close)           (struct usb_serial_port *port, struct file * filp);
 227         int  (*write)           (struct usb_serial_port *port, const unsigned char *buf, int count);
 228         int  (*write_room)      (struct usb_serial_port *port);
 229         int  (*ioctl)           (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg);
 230         void (*set_termios)     (struct usb_serial_port *port, struct ktermios * old);
 231         void (*break_ctl)       (struct usb_serial_port *port, int break_state);
 232         int  (*chars_in_buffer) (struct usb_serial_port *port);
 233         void (*throttle)        (struct usb_serial_port *port);
 234         void (*unthrottle)      (struct usb_serial_port *port);
 235         int  (*tiocmget)        (struct usb_serial_port *port, struct file *file);
 236         int  (*tiocmset)        (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear);
 237
 238         void (*read_int_callback)(struct urb *urb);
 239         void (*write_int_callback)(struct urb *urb);
 240         void (*read_bulk_callback)(struct urb *urb);
 241         void (*write_bulk_callback)(struct urb *urb);
 242 };
 243 #define to_usb_serial_driver(d) container_of(d, struct usb_serial_driver, driver)
 244
 245 extern int  usb_serial_register(struct usb_serial_driver *driver);
 246 extern void usb_serial_deregister(struct usb_serial_driver *driver);
 247 extern void usb_serial_port_softint(struct usb_serial_port *port);
 248
 249 extern int usb_serial_probe(struct usb_interface *iface, const struct usb_device_id *id);
 250 extern void usb_serial_disconnect(struct usb_interface *iface);
 251
 252 extern int ezusb_writememory (struct usb_serial *serial, int address, unsigned char *data, int length, __u8 bRequest);
 253 extern int ezusb_set_reset (struct usb_serial *serial, unsigned char reset_bit);
 254
 255 /* USB Serial console functions */
 256 #ifdef CONFIG_USB_SERIAL_CONSOLE
 257 extern void usb_serial_console_init (int debug, int minor);
 258 extern void usb_serial_console_exit (void);
 259 extern void usb_serial_console_disconnect(struct usb_serial *serial);
 260 #else
 261 static inline void usb_serial_console_init (int debug, int minor) { }
 262 static inline void usb_serial_console_exit (void) { }
 263 static inline void usb_serial_console_disconnect(struct usb_serial *serial) {}
 264 #endif
 265
 266 /* Functions needed by other parts of the usbserial core */
 267 extern struct usb_serial *usb_serial_get_by_index (unsigned int minor);
 268 extern void usb_serial_put(struct usb_serial *serial);
 269 extern int usb_serial_generic_open (struct usb_serial_port *port, struct file *filp);
 270 extern int usb_serial_generic_write (struct usb_serial_port *port, const unsigned char *buf, int count);
 271 extern void usb_serial_generic_close (struct usb_serial_port *port, struct file *filp);
 272 extern int usb_serial_generic_write_room (struct usb_serial_port *port);
 273 extern int usb_serial_generic_chars_in_buffer (struct usb_serial_port *port);
 274 extern void usb_serial_generic_read_bulk_callback (struct urb *urb);
 275 extern void usb_serial_generic_write_bulk_callback (struct urb *urb);
 276 extern void usb_serial_generic_throttle (struct usb_serial_port *port);
 277 extern void usb_serial_generic_unthrottle (struct usb_serial_port *port);
 278 extern void usb_serial_generic_shutdown (struct usb_serial *serial);
 279 extern int usb_serial_generic_register (int debug);
 280 extern void usb_serial_generic_deregister (void);
 281
 282 extern int usb_serial_bus_register (struct usb_serial_driver *device);
 283 extern void usb_serial_bus_deregister (struct usb_serial_driver *device);
 284
 285 extern struct usb_serial_driver usb_serial_generic_device;
 286 extern struct bus_type usb_serial_bus_type;
 287 extern struct tty_driver *usb_serial_tty_driver;
 288
 289 static inline void usb_serial_debug_data(int debug,
 290                                          struct device *dev,
 291                                          const char *function, int size,
 292                                          const unsigned char *data)
 293 {
 294         int i;
 295
 296         if (debug) {
 297                 dev_printk(KERN_DEBUG, dev, "%s - length = %d, data = ", function, size);
 298                 for (i = 0; i < size; ++i)
 299                         printk ("%.2x ", data[i]);
 300                 printk ("\n");
 301         }
 302 }
 303
 304 /* Use our own dbg macro */
 305 #undef dbg
 306 #define dbg(format, arg...) do { if (debug) printk(KERN_DEBUG "%s: " format "\n" , __FILE__ , ## arg); } while (0)
 307
 308
 309
 310 #endif  /* ifdef __LINUX_USB_SERIAL_H */
 311