drivers/usb/serial/usb-serial.h

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