git.oblomov.eu Git - linux-2.6/blob - drivers/net/usb/hso.c

   1 /******************************************************************************
   2  *
   3  * Driver for Option High Speed Mobile Devices.
   4  *
   5  *  Copyright (C) 2008 Option International
   6  *                     Filip Aben <f.aben@option.com>
   7  *                     Denis Joseph Barrow <d.barow@option.com>
   8  *  Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
   9  *                      <ajb@spheresystems.co.uk>
  10  *  Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
  11  *  Copyright (C) 2008 Novell, Inc.
  12  *
  13  *  This program is free software; you can redistribute it and/or modify
  14  *  it under the terms of the GNU General Public License version 2 as
  15  *  published by the Free Software Foundation.
  16  *
  17  *  This program is distributed in the hope that it will be useful,
  18  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  *  GNU General Public License for more details.
  21  *
  22  *  You should have received a copy of the GNU General Public License
  23  *  along with this program; if not, write to the Free Software
  24  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  25  *  USA
  26  *
  27  *
  28  *****************************************************************************/
  29
  30 /******************************************************************************
  31  *
  32  * Description of the device:
  33  *
  34  * Interface 0: Contains the IP network interface on the bulk end points.
  35  *              The multiplexed serial ports are using the interrupt and
  36  *              control endpoints.
  37  *              Interrupt contains a bitmap telling which multiplexed
  38  *              serialport needs servicing.
  39  *
  40  * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
  41  *              port is opened, as this have a huge impact on the network port
  42  *              throughput.
  43  *
  44  * Interface 2: Standard modem interface - circuit switched interface, this
  45  *              can be used to make a standard ppp connection however it
  46  *              should not be used in conjunction with the IP network interface
  47  *              enabled for USB performance reasons i.e. if using this set
  48  *              ideally disable_net=1.
  49  *
  50  *****************************************************************************/
  51
  52 #include <linux/sched.h>
  53 #include <linux/slab.h>
  54 #include <linux/init.h>
  55 #include <linux/delay.h>
  56 #include <linux/netdevice.h>
  57 #include <linux/module.h>
  58 #include <linux/ethtool.h>
  59 #include <linux/usb.h>
  60 #include <linux/timer.h>
  61 #include <linux/tty.h>
  62 #include <linux/tty_driver.h>
  63 #include <linux/tty_flip.h>
  64 #include <linux/kmod.h>
  65 #include <linux/rfkill.h>
  66 #include <linux/ip.h>
  67 #include <linux/uaccess.h>
  68 #include <linux/usb/cdc.h>
  69 #include <net/arp.h>
  70 #include <asm/byteorder.h>
  71 #include <linux/serial_core.h>
  72 #include <linux/serial.h>
  73
  74
  75 #define DRIVER_VERSION                  "1.2"
  76 #define MOD_AUTHOR                      "Option Wireless"
  77 #define MOD_DESCRIPTION                 "USB High Speed Option driver"
  78 #define MOD_LICENSE                     "GPL"
  79
  80 #define HSO_MAX_NET_DEVICES             10
  81 #define HSO__MAX_MTU                    2048
  82 #define DEFAULT_MTU                     1500
  83 #define DEFAULT_MRU                     1500
  84
  85 #define CTRL_URB_RX_SIZE                1024
  86 #define CTRL_URB_TX_SIZE                64
  87
  88 #define BULK_URB_RX_SIZE                4096
  89 #define BULK_URB_TX_SIZE                8192
  90
  91 #define MUX_BULK_RX_BUF_SIZE            HSO__MAX_MTU
  92 #define MUX_BULK_TX_BUF_SIZE            HSO__MAX_MTU
  93 #define MUX_BULK_RX_BUF_COUNT           4
  94 #define USB_TYPE_OPTION_VENDOR          0x20
  95
  96 /* These definitions are used with the struct hso_net flags element */
  97 /* - use *_bit operations on it. (bit indices not values.) */
  98 #define HSO_NET_RUNNING                 0
  99
 100 #define HSO_NET_TX_TIMEOUT              (HZ*10)
 101
 102 #define HSO_SERIAL_MAGIC                0x48534f31
 103
 104 /* Number of ttys to handle */
 105 #define HSO_SERIAL_TTY_MINORS           256
 106
 107 #define MAX_RX_URBS                     2
 108
 109 static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty)
 110 {
 111         if (tty)
 112                 return tty->driver_data;
 113         return NULL;
 114 }
 115
 116 /*****************************************************************************/
 117 /* Debugging functions                                                       */
 118 /*****************************************************************************/
 119 #define D__(lvl_, fmt, arg...)                          \
 120         do {                                            \
 121                 printk(lvl_ "[%d:%s]: " fmt "\n",       \
 122                        __LINE__, __func__, ## arg);     \
 123         } while (0)
 124
 125 #define D_(lvl, args...)                                \
 126         do {                                            \
 127                 if (lvl & debug)                        \
 128                         D__(KERN_INFO, args);           \
 129         } while (0)
 130
 131 #define D1(args...)     D_(0x01, ##args)
 132 #define D2(args...)     D_(0x02, ##args)
 133 #define D3(args...)     D_(0x04, ##args)
 134 #define D4(args...)     D_(0x08, ##args)
 135 #define D5(args...)     D_(0x10, ##args)
 136
 137 /*****************************************************************************/
 138 /* Enumerators                                                               */
 139 /*****************************************************************************/
 140 enum pkt_parse_state {
 141         WAIT_IP,
 142         WAIT_DATA,
 143         WAIT_SYNC
 144 };
 145
 146 /*****************************************************************************/
 147 /* Structs                                                                   */
 148 /*****************************************************************************/
 149
 150 struct hso_shared_int {
 151         struct usb_endpoint_descriptor *intr_endp;
 152         void *shared_intr_buf;
 153         struct urb *shared_intr_urb;
 154         struct usb_device *usb;
 155         int use_count;
 156         int ref_count;
 157         struct mutex shared_int_lock;
 158 };
 159
 160 struct hso_net {
 161         struct hso_device *parent;
 162         struct net_device *net;
 163         struct rfkill *rfkill;
 164
 165         struct usb_endpoint_descriptor *in_endp;
 166         struct usb_endpoint_descriptor *out_endp;
 167
 168         struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
 169         struct urb *mux_bulk_tx_urb;
 170         void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
 171         void *mux_bulk_tx_buf;
 172
 173         struct sk_buff *skb_rx_buf;
 174         struct sk_buff *skb_tx_buf;
 175
 176         enum pkt_parse_state rx_parse_state;
 177         spinlock_t net_lock;
 178
 179         unsigned short rx_buf_size;
 180         unsigned short rx_buf_missing;
 181         struct iphdr rx_ip_hdr;
 182
 183         unsigned long flags;
 184 };
 185
 186 enum rx_ctrl_state{
 187         RX_IDLE,
 188         RX_SENT,
 189         RX_PENDING
 190 };
 191
 192 #define BM_REQUEST_TYPE (0xa1)
 193 #define B_NOTIFICATION  (0x20)
 194 #define W_VALUE         (0x0)
 195 #define W_INDEX         (0x2)
 196 #define W_LENGTH        (0x2)
 197
 198 #define B_OVERRUN       (0x1<<6)
 199 #define B_PARITY        (0x1<<5)
 200 #define B_FRAMING       (0x1<<4)
 201 #define B_RING_SIGNAL   (0x1<<3)
 202 #define B_BREAK         (0x1<<2)
 203 #define B_TX_CARRIER    (0x1<<1)
 204 #define B_RX_CARRIER    (0x1<<0)
 205
 206 struct hso_serial_state_notification {
 207         u8 bmRequestType;
 208         u8 bNotification;
 209         u16 wValue;
 210         u16 wIndex;
 211         u16 wLength;
 212         u16 UART_state_bitmap;
 213 } __attribute__((packed));
 214
 215 struct hso_tiocmget {
 216         struct mutex mutex;
 217         wait_queue_head_t waitq;
 218         int    intr_completed;
 219         struct usb_endpoint_descriptor *endp;
 220         struct urb *urb;
 221         struct hso_serial_state_notification serial_state_notification;
 222         u16    prev_UART_state_bitmap;
 223         struct uart_icount icount;
 224 };
 225
 226
 227 struct hso_serial {
 228         struct hso_device *parent;
 229         int magic;
 230         u8 minor;
 231
 232         struct hso_shared_int *shared_int;
 233
 234         /* rx/tx urb could be either a bulk urb or a control urb depending
 235            on which serial port it is used on. */
 236         struct urb *rx_urb[MAX_RX_URBS];
 237         u8 num_rx_urbs;
 238         u8 *rx_data[MAX_RX_URBS];
 239         u16 rx_data_length;     /* should contain allocated length */
 240
 241         struct urb *tx_urb;
 242         u8 *tx_data;
 243         u8 *tx_buffer;
 244         u16 tx_data_length;     /* should contain allocated length */
 245         u16 tx_data_count;
 246         u16 tx_buffer_count;
 247         struct usb_ctrlrequest ctrl_req_tx;
 248         struct usb_ctrlrequest ctrl_req_rx;
 249
 250         struct usb_endpoint_descriptor *in_endp;
 251         struct usb_endpoint_descriptor *out_endp;
 252
 253         enum rx_ctrl_state rx_state;
 254         u8 rts_state;
 255         u8 dtr_state;
 256         unsigned tx_urb_used:1;
 257
 258         /* from usb_serial_port */
 259         struct tty_struct *tty;
 260         int open_count;
 261         spinlock_t serial_lock;
 262
 263         int (*write_data) (struct hso_serial *serial);
 264         struct hso_tiocmget  *tiocmget;
 265         /* Hacks required to get flow control
 266          * working on the serial receive buffers
 267          * so as not to drop characters on the floor.
 268          */
 269         int  curr_rx_urb_idx;
 270         u16  curr_rx_urb_offset;
 271         u8   rx_urb_filled[MAX_RX_URBS];
 272         struct tasklet_struct unthrottle_tasklet;
 273         struct work_struct    retry_unthrottle_workqueue;
 274 };
 275
 276 struct hso_device {
 277         union {
 278                 struct hso_serial *dev_serial;
 279                 struct hso_net *dev_net;
 280         } port_data;
 281
 282         u32 port_spec;
 283
 284         u8 is_active;
 285         u8 usb_gone;
 286         struct work_struct async_get_intf;
 287         struct work_struct async_put_intf;
 288
 289         struct usb_device *usb;
 290         struct usb_interface *interface;
 291
 292         struct device *dev;
 293         struct kref ref;
 294         struct mutex mutex;
 295 };
 296
 297 /* Type of interface */
 298 #define HSO_INTF_MASK           0xFF00
 299 #define HSO_INTF_MUX            0x0100
 300 #define HSO_INTF_BULK           0x0200
 301
 302 /* Type of port */
 303 #define HSO_PORT_MASK           0xFF
 304 #define HSO_PORT_NO_PORT        0x0
 305 #define HSO_PORT_CONTROL        0x1
 306 #define HSO_PORT_APP            0x2
 307 #define HSO_PORT_GPS            0x3
 308 #define HSO_PORT_PCSC           0x4
 309 #define HSO_PORT_APP2           0x5
 310 #define HSO_PORT_GPS_CONTROL    0x6
 311 #define HSO_PORT_MSD            0x7
 312 #define HSO_PORT_VOICE          0x8
 313 #define HSO_PORT_DIAG2          0x9
 314 #define HSO_PORT_DIAG           0x10
 315 #define HSO_PORT_MODEM          0x11
 316 #define HSO_PORT_NETWORK        0x12
 317
 318 /* Additional device info */
 319 #define HSO_INFO_MASK           0xFF000000
 320 #define HSO_INFO_CRC_BUG        0x01000000
 321
 322 /*****************************************************************************/
 323 /* Prototypes                                                                */
 324 /*****************************************************************************/
 325 /* Serial driver functions */
 326 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
 327                                unsigned int set, unsigned int clear);
 328 static void ctrl_callback(struct urb *urb);
 329 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
 330 static void hso_kick_transmit(struct hso_serial *serial);
 331 /* Helper functions */
 332 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
 333                                    struct usb_device *usb, gfp_t gfp);
 334 static void log_usb_status(int status, const char *function);
 335 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
 336                                                   int type, int dir);
 337 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
 338 static void hso_free_interface(struct usb_interface *intf);
 339 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
 340 static int hso_stop_serial_device(struct hso_device *hso_dev);
 341 static int hso_start_net_device(struct hso_device *hso_dev);
 342 static void hso_free_shared_int(struct hso_shared_int *shared_int);
 343 static int hso_stop_net_device(struct hso_device *hso_dev);
 344 static void hso_serial_ref_free(struct kref *ref);
 345 static void hso_std_serial_read_bulk_callback(struct urb *urb);
 346 static int hso_mux_serial_read(struct hso_serial *serial);
 347 static void async_get_intf(struct work_struct *data);
 348 static void async_put_intf(struct work_struct *data);
 349 static int hso_put_activity(struct hso_device *hso_dev);
 350 static int hso_get_activity(struct hso_device *hso_dev);
 351 static void tiocmget_intr_callback(struct urb *urb);
 352 /*****************************************************************************/
 353 /* Helping functions                                                         */
 354 /*****************************************************************************/
 355
 356 /* #define DEBUG */
 357
 358 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
 359 {
 360         return hso_dev->port_data.dev_net;
 361 }
 362
 363 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
 364 {
 365         return hso_dev->port_data.dev_serial;
 366 }
 367
 368 /* Debugging functions */
 369 #ifdef DEBUG
 370 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
 371                      unsigned int len)
 372 {
 373         static char name[255];
 374
 375         sprintf(name, "hso[%d:%s]", line_count, func_name);
 376         print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
 377 }
 378
 379 #define DUMP(buf_, len_)        \
 380         dbg_dump(__LINE__, __func__, buf_, len_)
 381
 382 #define DUMP1(buf_, len_)                       \
 383         do {                                    \
 384                 if (0x01 & debug)               \
 385                         DUMP(buf_, len_);       \
 386         } while (0)
 387 #else
 388 #define DUMP(buf_, len_)
 389 #define DUMP1(buf_, len_)
 390 #endif
 391
 392 /* module parameters */
 393 static int debug;
 394 static int tty_major;
 395 static int disable_net;
 396
 397 /* driver info */
 398 static const char driver_name[] = "hso";
 399 static const char tty_filename[] = "ttyHS";
 400 static const char *version = __FILE__ ": " DRIVER_VERSION " " MOD_AUTHOR;
 401 /* the usb driver itself (registered in hso_init) */
 402 static struct usb_driver hso_driver;
 403 /* serial structures */
 404 static struct tty_driver *tty_drv;
 405 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
 406 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
 407 static spinlock_t serial_table_lock;
 408
 409 static const s32 default_port_spec[] = {
 410         HSO_INTF_MUX | HSO_PORT_NETWORK,
 411         HSO_INTF_BULK | HSO_PORT_DIAG,
 412         HSO_INTF_BULK | HSO_PORT_MODEM,
 413         0
 414 };
 415
 416 static const s32 icon321_port_spec[] = {
 417         HSO_INTF_MUX | HSO_PORT_NETWORK,
 418         HSO_INTF_BULK | HSO_PORT_DIAG2,
 419         HSO_INTF_BULK | HSO_PORT_MODEM,
 420         HSO_INTF_BULK | HSO_PORT_DIAG,
 421         0
 422 };
 423
 424 #define default_port_device(vendor, product)    \
 425         USB_DEVICE(vendor, product),    \
 426                 .driver_info = (kernel_ulong_t)default_port_spec
 427
 428 #define icon321_port_device(vendor, product)    \
 429         USB_DEVICE(vendor, product),    \
 430                 .driver_info = (kernel_ulong_t)icon321_port_spec
 431
 432 /* list of devices we support */
 433 static const struct usb_device_id hso_ids[] = {
 434         {default_port_device(0x0af0, 0x6711)},
 435         {default_port_device(0x0af0, 0x6731)},
 436         {default_port_device(0x0af0, 0x6751)},
 437         {default_port_device(0x0af0, 0x6771)},
 438         {default_port_device(0x0af0, 0x6791)},
 439         {default_port_device(0x0af0, 0x6811)},
 440         {default_port_device(0x0af0, 0x6911)},
 441         {default_port_device(0x0af0, 0x6951)},
 442         {default_port_device(0x0af0, 0x6971)},
 443         {default_port_device(0x0af0, 0x7011)},
 444         {default_port_device(0x0af0, 0x7031)},
 445         {default_port_device(0x0af0, 0x7051)},
 446         {default_port_device(0x0af0, 0x7071)},
 447         {default_port_device(0x0af0, 0x7111)},
 448         {default_port_device(0x0af0, 0x7211)},
 449         {default_port_device(0x0af0, 0x7251)},
 450         {default_port_device(0x0af0, 0x7271)},
 451         {default_port_device(0x0af0, 0x7311)},
 452         {default_port_device(0x0af0, 0xc031)},  /* Icon-Edge */
 453         {icon321_port_device(0x0af0, 0xd013)},  /* Module HSxPA */
 454         {icon321_port_device(0x0af0, 0xd031)},  /* Icon-321 */
 455         {icon321_port_device(0x0af0, 0xd033)},  /* Icon-322 */
 456         {USB_DEVICE(0x0af0, 0x7301)},           /* GE40x */
 457         {USB_DEVICE(0x0af0, 0x7361)},           /* GE40x */
 458         {USB_DEVICE(0x0af0, 0x7381)},           /* GE40x */
 459         {USB_DEVICE(0x0af0, 0x7401)},           /* GI 0401 */
 460         {USB_DEVICE(0x0af0, 0x7501)},           /* GTM 382 */
 461         {USB_DEVICE(0x0af0, 0x7601)},           /* GE40x */
 462         {USB_DEVICE(0x0af0, 0x7701)},
 463         {USB_DEVICE(0x0af0, 0x7801)},
 464         {USB_DEVICE(0x0af0, 0x7901)},
 465         {USB_DEVICE(0x0af0, 0x7361)},
 466         {USB_DEVICE(0x0af0, 0xd057)},
 467         {USB_DEVICE(0x0af0, 0xd055)},
 468         {}
 469 };
 470 MODULE_DEVICE_TABLE(usb, hso_ids);
 471
 472 /* Sysfs attribute */
 473 static ssize_t hso_sysfs_show_porttype(struct device *dev,
 474                                        struct device_attribute *attr,
 475                                        char *buf)
 476 {
 477         struct hso_device *hso_dev = dev->driver_data;
 478         char *port_name;
 479
 480         if (!hso_dev)
 481                 return 0;
 482
 483         switch (hso_dev->port_spec & HSO_PORT_MASK) {
 484         case HSO_PORT_CONTROL:
 485                 port_name = "Control";
 486                 break;
 487         case HSO_PORT_APP:
 488                 port_name = "Application";
 489                 break;
 490         case HSO_PORT_APP2:
 491                 port_name = "Application2";
 492                 break;
 493         case HSO_PORT_GPS:
 494                 port_name = "GPS";
 495                 break;
 496         case HSO_PORT_GPS_CONTROL:
 497                 port_name = "GPS Control";
 498                 break;
 499         case HSO_PORT_PCSC:
 500                 port_name = "PCSC";
 501                 break;
 502         case HSO_PORT_DIAG:
 503                 port_name = "Diagnostic";
 504                 break;
 505         case HSO_PORT_DIAG2:
 506                 port_name = "Diagnostic2";
 507                 break;
 508         case HSO_PORT_MODEM:
 509                 port_name = "Modem";
 510                 break;
 511         case HSO_PORT_NETWORK:
 512                 port_name = "Network";
 513                 break;
 514         default:
 515                 port_name = "Unknown";
 516                 break;
 517         }
 518
 519         return sprintf(buf, "%s\n", port_name);
 520 }
 521 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
 522
 523 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
 524 {
 525         int idx;
 526
 527         for (idx = 0; idx < serial->num_rx_urbs; idx++)
 528                 if (serial->rx_urb[idx] == urb)
 529                         return idx;
 530         dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
 531         return -1;
 532 }
 533
 534 /* converts mux value to a port spec value */
 535 static u32 hso_mux_to_port(int mux)
 536 {
 537         u32 result;
 538
 539         switch (mux) {
 540         case 0x1:
 541                 result = HSO_PORT_CONTROL;
 542                 break;
 543         case 0x2:
 544                 result = HSO_PORT_APP;
 545                 break;
 546         case 0x4:
 547                 result = HSO_PORT_PCSC;
 548                 break;
 549         case 0x8:
 550                 result = HSO_PORT_GPS;
 551                 break;
 552         case 0x10:
 553                 result = HSO_PORT_APP2;
 554                 break;
 555         default:
 556                 result = HSO_PORT_NO_PORT;
 557         }
 558         return result;
 559 }
 560
 561 /* converts port spec value to a mux value */
 562 static u32 hso_port_to_mux(int port)
 563 {
 564         u32 result;
 565
 566         switch (port & HSO_PORT_MASK) {
 567         case HSO_PORT_CONTROL:
 568                 result = 0x0;
 569                 break;
 570         case HSO_PORT_APP:
 571                 result = 0x1;
 572                 break;
 573         case HSO_PORT_PCSC:
 574                 result = 0x2;
 575                 break;
 576         case HSO_PORT_GPS:
 577                 result = 0x3;
 578                 break;
 579         case HSO_PORT_APP2:
 580                 result = 0x4;
 581                 break;
 582         default:
 583                 result = 0x0;
 584         }
 585         return result;
 586 }
 587
 588 static struct hso_serial *get_serial_by_shared_int_and_type(
 589                                         struct hso_shared_int *shared_int,
 590                                         int mux)
 591 {
 592         int i, port;
 593
 594         port = hso_mux_to_port(mux);
 595
 596         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
 597                 if (serial_table[i]
 598                     && (dev2ser(serial_table[i])->shared_int == shared_int)
 599                     && ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
 600                         return dev2ser(serial_table[i]);
 601                 }
 602         }
 603
 604         return NULL;
 605 }
 606
 607 static struct hso_serial *get_serial_by_index(unsigned index)
 608 {
 609         struct hso_serial *serial = NULL;
 610         unsigned long flags;
 611
 612         spin_lock_irqsave(&serial_table_lock, flags);
 613         if (serial_table[index])
 614                 serial = dev2ser(serial_table[index]);
 615         spin_unlock_irqrestore(&serial_table_lock, flags);
 616
 617         return serial;
 618 }
 619
 620 static int get_free_serial_index(void)
 621 {
 622         int index;
 623         unsigned long flags;
 624
 625         spin_lock_irqsave(&serial_table_lock, flags);
 626         for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
 627                 if (serial_table[index] == NULL) {
 628                         spin_unlock_irqrestore(&serial_table_lock, flags);
 629                         return index;
 630                 }
 631         }
 632         spin_unlock_irqrestore(&serial_table_lock, flags);
 633
 634         printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
 635         return -1;
 636 }
 637
 638 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
 639 {
 640         unsigned long flags;
 641
 642         spin_lock_irqsave(&serial_table_lock, flags);
 643         if (serial)
 644                 serial_table[index] = serial->parent;
 645         else
 646                 serial_table[index] = NULL;
 647         spin_unlock_irqrestore(&serial_table_lock, flags);
 648 }
 649
 650 /* log a meaningful explanation of an USB status */
 651 static void log_usb_status(int status, const char *function)
 652 {
 653         char *explanation;
 654
 655         switch (status) {
 656         case -ENODEV:
 657                 explanation = "no device";
 658                 break;
 659         case -ENOENT:
 660                 explanation = "endpoint not enabled";
 661                 break;
 662         case -EPIPE:
 663                 explanation = "endpoint stalled";
 664                 break;
 665         case -ENOSPC:
 666                 explanation = "not enough bandwidth";
 667                 break;
 668         case -ESHUTDOWN:
 669                 explanation = "device disabled";
 670                 break;
 671         case -EHOSTUNREACH:
 672                 explanation = "device suspended";
 673                 break;
 674         case -EINVAL:
 675         case -EAGAIN:
 676         case -EFBIG:
 677         case -EMSGSIZE:
 678                 explanation = "internal error";
 679                 break;
 680         default:
 681                 explanation = "unknown status";
 682                 break;
 683         }
 684         D1("%s: received USB status - %s (%d)", function, explanation, status);
 685 }
 686
 687 /* Network interface functions */
 688
 689 /* called when net interface is brought up by ifconfig */
 690 static int hso_net_open(struct net_device *net)
 691 {
 692         struct hso_net *odev = netdev_priv(net);
 693         unsigned long flags = 0;
 694
 695         if (!odev) {
 696                 dev_err(&net->dev, "No net device !\n");
 697                 return -ENODEV;
 698         }
 699
 700         odev->skb_tx_buf = NULL;
 701
 702         /* setup environment */
 703         spin_lock_irqsave(&odev->net_lock, flags);
 704         odev->rx_parse_state = WAIT_IP;
 705         odev->rx_buf_size = 0;
 706         odev->rx_buf_missing = sizeof(struct iphdr);
 707         spin_unlock_irqrestore(&odev->net_lock, flags);
 708
 709         /* We are up and running. */
 710         set_bit(HSO_NET_RUNNING, &odev->flags);
 711         hso_start_net_device(odev->parent);
 712
 713         /* Tell the kernel we are ready to start receiving from it */
 714         netif_start_queue(net);
 715
 716         return 0;
 717 }
 718
 719 /* called when interface is brought down by ifconfig */
 720 static int hso_net_close(struct net_device *net)
 721 {
 722         struct hso_net *odev = netdev_priv(net);
 723
 724         /* we don't need the queue anymore */
 725         netif_stop_queue(net);
 726         /* no longer running */
 727         clear_bit(HSO_NET_RUNNING, &odev->flags);
 728
 729         hso_stop_net_device(odev->parent);
 730
 731         /* done */
 732         return 0;
 733 }
 734
 735 /* USB tells is xmit done, we should start the netqueue again */
 736 static void write_bulk_callback(struct urb *urb)
 737 {
 738         struct hso_net *odev = urb->context;
 739         int status = urb->status;
 740
 741         /* Sanity check */
 742         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
 743                 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
 744                 return;
 745         }
 746
 747         /* Do we still have a valid kernel network device? */
 748         if (!netif_device_present(odev->net)) {
 749                 dev_err(&urb->dev->dev, "%s: net device not present\n",
 750                         __func__);
 751                 return;
 752         }
 753
 754         /* log status, but don't act on it, we don't need to resubmit anything
 755          * anyhow */
 756         if (status)
 757                 log_usb_status(status, __func__);
 758
 759         hso_put_activity(odev->parent);
 760
 761         /* Tell the network interface we are ready for another frame */
 762         netif_wake_queue(odev->net);
 763 }
 764
 765 /* called by kernel when we need to transmit a packet */
 766 static int hso_net_start_xmit(struct sk_buff *skb, struct net_device *net)
 767 {
 768         struct hso_net *odev = netdev_priv(net);
 769         int result;
 770
 771         /* Tell the kernel, "No more frames 'til we are done with this one." */
 772         netif_stop_queue(net);
 773         if (hso_get_activity(odev->parent) == -EAGAIN) {
 774                 odev->skb_tx_buf = skb;
 775                 return 0;
 776         }
 777
 778         /* log if asked */
 779         DUMP1(skb->data, skb->len);
 780         /* Copy it from kernel memory to OUR memory */
 781         memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
 782         D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
 783
 784         /* Fill in the URB for shipping it out. */
 785         usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
 786                           odev->parent->usb,
 787                           usb_sndbulkpipe(odev->parent->usb,
 788                                           odev->out_endp->
 789                                           bEndpointAddress & 0x7F),
 790                           odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
 791                           odev);
 792
 793         /* Deal with the Zero Length packet problem, I hope */
 794         odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
 795
 796         /* Send the URB on its merry way. */
 797         result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
 798         if (result) {
 799                 dev_warn(&odev->parent->interface->dev,
 800                         "failed mux_bulk_tx_urb %d", result);
 801                 net->stats.tx_errors++;
 802                 netif_start_queue(net);
 803         } else {
 804                 net->stats.tx_packets++;
 805                 net->stats.tx_bytes += skb->len;
 806                 /* And tell the kernel when the last transmit started. */
 807                 net->trans_start = jiffies;
 808         }
 809         dev_kfree_skb(skb);
 810         /* we're done */
 811         return result;
 812 }
 813
 814 static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
 815 {
 816         struct hso_net *odev = netdev_priv(net);
 817
 818         strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
 819         strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
 820         usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info);
 821 }
 822
 823 static struct ethtool_ops ops = {
 824         .get_drvinfo = hso_get_drvinfo,
 825         .get_link = ethtool_op_get_link
 826 };
 827
 828 /* called when a packet did not ack after watchdogtimeout */
 829 static void hso_net_tx_timeout(struct net_device *net)
 830 {
 831         struct hso_net *odev = netdev_priv(net);
 832
 833         if (!odev)
 834                 return;
 835
 836         /* Tell syslog we are hosed. */
 837         dev_warn(&net->dev, "Tx timed out.\n");
 838
 839         /* Tear the waiting frame off the list */
 840         if (odev->mux_bulk_tx_urb
 841             && (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
 842                 usb_unlink_urb(odev->mux_bulk_tx_urb);
 843
 844         /* Update statistics */
 845         net->stats.tx_errors++;
 846 }
 847
 848 /* make a real packet from the received USB buffer */
 849 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
 850                         unsigned int count, unsigned char is_eop)
 851 {
 852         unsigned short temp_bytes;
 853         unsigned short buffer_offset = 0;
 854         unsigned short frame_len;
 855         unsigned char *tmp_rx_buf;
 856
 857         /* log if needed */
 858         D1("Rx %d bytes", count);
 859         DUMP(ip_pkt, min(128, (int)count));
 860
 861         while (count) {
 862                 switch (odev->rx_parse_state) {
 863                 case WAIT_IP:
 864                         /* waiting for IP header. */
 865                         /* wanted bytes - size of ip header */
 866                         temp_bytes =
 867                             (count <
 868                              odev->rx_buf_missing) ? count : odev->
 869                             rx_buf_missing;
 870
 871                         memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
 872                                odev->rx_buf_size, ip_pkt + buffer_offset,
 873                                temp_bytes);
 874
 875                         odev->rx_buf_size += temp_bytes;
 876                         buffer_offset += temp_bytes;
 877                         odev->rx_buf_missing -= temp_bytes;
 878                         count -= temp_bytes;
 879
 880                         if (!odev->rx_buf_missing) {
 881                                 /* header is complete allocate an sk_buffer and
 882                                  * continue to WAIT_DATA */
 883                                 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
 884
 885                                 if ((frame_len > DEFAULT_MRU) ||
 886                                     (frame_len < sizeof(struct iphdr))) {
 887                                         dev_err(&odev->net->dev,
 888                                                 "Invalid frame (%d) length\n",
 889                                                 frame_len);
 890                                         odev->rx_parse_state = WAIT_SYNC;
 891                                         continue;
 892                                 }
 893                                 /* Allocate an sk_buff */
 894                                 odev->skb_rx_buf = dev_alloc_skb(frame_len);
 895                                 if (!odev->skb_rx_buf) {
 896                                         /* We got no receive buffer. */
 897                                         D1("could not allocate memory");
 898                                         odev->rx_parse_state = WAIT_SYNC;
 899                                         return;
 900                                 }
 901                                 /* Here's where it came from */
 902                                 odev->skb_rx_buf->dev = odev->net;
 903
 904                                 /* Copy what we got so far. make room for iphdr
 905                                  * after tail. */
 906                                 tmp_rx_buf =
 907                                     skb_put(odev->skb_rx_buf,
 908                                             sizeof(struct iphdr));
 909                                 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
 910                                        sizeof(struct iphdr));
 911
 912                                 /* ETH_HLEN */
 913                                 odev->rx_buf_size = sizeof(struct iphdr);
 914
 915                                 /* Filip actually use .tot_len */
 916                                 odev->rx_buf_missing =
 917                                     frame_len - sizeof(struct iphdr);
 918                                 odev->rx_parse_state = WAIT_DATA;
 919                         }
 920                         break;
 921
 922                 case WAIT_DATA:
 923                         temp_bytes = (count < odev->rx_buf_missing)
 924                                         ? count : odev->rx_buf_missing;
 925
 926                         /* Copy the rest of the bytes that are left in the
 927                          * buffer into the waiting sk_buf. */
 928                         /* Make room for temp_bytes after tail. */
 929                         tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
 930                         memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
 931
 932                         odev->rx_buf_missing -= temp_bytes;
 933                         count -= temp_bytes;
 934                         buffer_offset += temp_bytes;
 935                         odev->rx_buf_size += temp_bytes;
 936                         if (!odev->rx_buf_missing) {
 937                                 /* Packet is complete. Inject into stack. */
 938                                 /* We have IP packet here */
 939                                 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
 940                                 /* don't check it */
 941                                 odev->skb_rx_buf->ip_summed =
 942                                         CHECKSUM_UNNECESSARY;
 943
 944                                 skb_reset_mac_header(odev->skb_rx_buf);
 945
 946                                 /* Ship it off to the kernel */
 947                                 netif_rx(odev->skb_rx_buf);
 948                                 /* No longer our buffer. */
 949                                 odev->skb_rx_buf = NULL;
 950
 951                                 /* update out statistics */
 952                                 odev->net->stats.rx_packets++;
 953
 954                                 odev->net->stats.rx_bytes += odev->rx_buf_size;
 955
 956                                 odev->rx_buf_size = 0;
 957                                 odev->rx_buf_missing = sizeof(struct iphdr);
 958                                 odev->rx_parse_state = WAIT_IP;
 959                         }
 960                         break;
 961
 962                 case WAIT_SYNC:
 963                         D1(" W_S");
 964                         count = 0;
 965                         break;
 966                 default:
 967                         D1(" ");
 968                         count--;
 969                         break;
 970                 }
 971         }
 972
 973         /* Recovery mechanism for WAIT_SYNC state. */
 974         if (is_eop) {
 975                 if (odev->rx_parse_state == WAIT_SYNC) {
 976                         odev->rx_parse_state = WAIT_IP;
 977                         odev->rx_buf_size = 0;
 978                         odev->rx_buf_missing = sizeof(struct iphdr);
 979                 }
 980         }
 981 }
 982
 983 /* Moving data from usb to kernel (in interrupt state) */
 984 static void read_bulk_callback(struct urb *urb)
 985 {
 986         struct hso_net *odev = urb->context;
 987         struct net_device *net;
 988         int result;
 989         int status = urb->status;
 990
 991         /* is al ok?  (Filip: Who's Al ?) */
 992         if (status) {
 993                 log_usb_status(status, __func__);
 994                 return;
 995         }
 996
 997         /* Sanity check */
 998         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
 999                 D1("BULK IN callback but driver is not active!");
1000                 return;
1001         }
1002         usb_mark_last_busy(urb->dev);
1003
1004         net = odev->net;
1005
1006         if (!netif_device_present(net)) {
1007                 /* Somebody killed our network interface... */
1008                 return;
1009         }
1010
1011         if (odev->parent->port_spec & HSO_INFO_CRC_BUG) {
1012                 u32 rest;
1013                 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1014                 rest = urb->actual_length % odev->in_endp->wMaxPacketSize;
1015                 if (((rest == 5) || (rest == 6))
1016                     && !memcmp(((u8 *) urb->transfer_buffer) +
1017                                urb->actual_length - 4, crc_check, 4)) {
1018                         urb->actual_length -= 4;
1019                 }
1020         }
1021
1022         /* do we even have a packet? */
1023         if (urb->actual_length) {
1024                 /* Handle the IP stream, add header and push it onto network
1025                  * stack if the packet is complete. */
1026                 spin_lock(&odev->net_lock);
1027                 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1028                             (urb->transfer_buffer_length >
1029                              urb->actual_length) ? 1 : 0);
1030                 spin_unlock(&odev->net_lock);
1031         }
1032
1033         /* We are done with this URB, resubmit it. Prep the USB to wait for
1034          * another frame. Reuse same as received. */
1035         usb_fill_bulk_urb(urb,
1036                           odev->parent->usb,
1037                           usb_rcvbulkpipe(odev->parent->usb,
1038                                           odev->in_endp->
1039                                           bEndpointAddress & 0x7F),
1040                           urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1041                           read_bulk_callback, odev);
1042
1043         /* Give this to the USB subsystem so it can tell us when more data
1044          * arrives. */
1045         result = usb_submit_urb(urb, GFP_ATOMIC);
1046         if (result)
1047                 dev_warn(&odev->parent->interface->dev,
1048                          "%s failed submit mux_bulk_rx_urb %d", __func__,
1049                          result);
1050 }
1051
1052 /* Serial driver functions */
1053
1054 static void hso_init_termios(struct ktermios *termios)
1055 {
1056         /*
1057          * The default requirements for this device are:
1058          */
1059         termios->c_iflag &=
1060                 ~(IGNBRK        /* disable ignore break */
1061                 | BRKINT        /* disable break causes interrupt */
1062                 | PARMRK        /* disable mark parity errors */
1063                 | ISTRIP        /* disable clear high bit of input characters */
1064                 | INLCR         /* disable translate NL to CR */
1065                 | IGNCR         /* disable ignore CR */
1066                 | ICRNL         /* disable translate CR to NL */
1067                 | IXON);        /* disable enable XON/XOFF flow control */
1068
1069         /* disable postprocess output characters */
1070         termios->c_oflag &= ~OPOST;
1071
1072         termios->c_lflag &=
1073                 ~(ECHO          /* disable echo input characters */
1074                 | ECHONL        /* disable echo new line */
1075                 | ICANON        /* disable erase, kill, werase, and rprnt
1076                                    special characters */
1077                 | ISIG          /* disable interrupt, quit, and suspend special
1078                                    characters */
1079                 | IEXTEN);      /* disable non-POSIX special characters */
1080
1081         termios->c_cflag &=
1082                 ~(CSIZE         /* no size */
1083                 | PARENB        /* disable parity bit */
1084                 | CBAUD         /* clear current baud rate */
1085                 | CBAUDEX);     /* clear current buad rate */
1086
1087         termios->c_cflag |= CS8;        /* character size 8 bits */
1088
1089         /* baud rate 115200 */
1090         tty_termios_encode_baud_rate(termios, 115200, 115200);
1091 }
1092
1093 static void _hso_serial_set_termios(struct tty_struct *tty,
1094                                     struct ktermios *old)
1095 {
1096         struct hso_serial *serial = get_serial_by_tty(tty);
1097         struct ktermios *termios;
1098
1099         if (!serial) {
1100                 printk(KERN_ERR "%s: no tty structures", __func__);
1101                 return;
1102         }
1103
1104         D4("port %d", serial->minor);
1105
1106         /*
1107          *      Fix up unsupported bits
1108          */
1109         termios = tty->termios;
1110         termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1111
1112         termios->c_cflag &=
1113                 ~(CSIZE         /* no size */
1114                 | PARENB        /* disable parity bit */
1115                 | CBAUD         /* clear current baud rate */
1116                 | CBAUDEX);     /* clear current buad rate */
1117
1118         termios->c_cflag |= CS8;        /* character size 8 bits */
1119
1120         /* baud rate 115200 */
1121         tty_encode_baud_rate(tty, 115200, 115200);
1122 }
1123
1124 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1125 {
1126         int result;
1127 #ifdef CONFIG_HSO_AUTOPM
1128         usb_mark_last_busy(urb->dev);
1129 #endif
1130         /* We are done with this URB, resubmit it. Prep the USB to wait for
1131          * another frame */
1132         usb_fill_bulk_urb(urb, serial->parent->usb,
1133                           usb_rcvbulkpipe(serial->parent->usb,
1134                                           serial->in_endp->
1135                                           bEndpointAddress & 0x7F),
1136                           urb->transfer_buffer, serial->rx_data_length,
1137                           hso_std_serial_read_bulk_callback, serial);
1138         /* Give this to the USB subsystem so it can tell us when more data
1139          * arrives. */
1140         result = usb_submit_urb(urb, GFP_ATOMIC);
1141         if (result) {
1142                 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1143                         __func__, result);
1144         }
1145 }
1146
1147
1148
1149
1150 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1151 {
1152         int count;
1153         struct urb *curr_urb;
1154
1155         while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1156                 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1157                 count = put_rxbuf_data(curr_urb, serial);
1158                 if (count == -1)
1159                         return;
1160                 if (count == 0) {
1161                         serial->curr_rx_urb_idx++;
1162                         if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1163                                 serial->curr_rx_urb_idx = 0;
1164                         hso_resubmit_rx_bulk_urb(serial, curr_urb);
1165                 }
1166         }
1167 }
1168
1169 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1170 {
1171         int count = 0;
1172         struct urb *urb;
1173
1174         urb = serial->rx_urb[0];
1175         if (serial->open_count > 0) {
1176                 count = put_rxbuf_data(urb, serial);
1177                 if (count == -1)
1178                         return;
1179         }
1180         /* Re issue a read as long as we receive data. */
1181
1182         if (count == 0 && ((urb->actual_length != 0) ||
1183                            (serial->rx_state == RX_PENDING))) {
1184                 serial->rx_state = RX_SENT;
1185                 hso_mux_serial_read(serial);
1186         } else
1187                 serial->rx_state = RX_IDLE;
1188 }
1189
1190
1191 /* read callback for Diag and CS port */
1192 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1193 {
1194         struct hso_serial *serial = urb->context;
1195         int status = urb->status;
1196
1197         /* sanity check */
1198         if (!serial) {
1199                 D1("serial == NULL");
1200                 return;
1201         } else if (status) {
1202                 log_usb_status(status, __func__);
1203                 return;
1204         }
1205
1206         D4("\n--- Got serial_read_bulk callback %02x ---", status);
1207         D1("Actual length = %d\n", urb->actual_length);
1208         DUMP1(urb->transfer_buffer, urb->actual_length);
1209
1210         /* Anyone listening? */
1211         if (serial->open_count == 0)
1212                 return;
1213
1214         if (status == 0) {
1215                 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) {
1216                         u32 rest;
1217                         u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1218                         rest =
1219                             urb->actual_length %
1220                             serial->in_endp->wMaxPacketSize;
1221                         if (((rest == 5) || (rest == 6))
1222                             && !memcmp(((u8 *) urb->transfer_buffer) +
1223                                        urb->actual_length - 4, crc_check, 4)) {
1224                                 urb->actual_length -= 4;
1225                         }
1226                 }
1227                 /* Valid data, handle RX data */
1228                 spin_lock(&serial->serial_lock);
1229                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1230                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1231                 spin_unlock(&serial->serial_lock);
1232         } else if (status == -ENOENT || status == -ECONNRESET) {
1233                 /* Unlinked - check for throttled port. */
1234                 D2("Port %d, successfully unlinked urb", serial->minor);
1235                 spin_lock(&serial->serial_lock);
1236                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1237                 hso_resubmit_rx_bulk_urb(serial, urb);
1238                 spin_unlock(&serial->serial_lock);
1239         } else {
1240                 D2("Port %d, status = %d for read urb", serial->minor, status);
1241                 return;
1242         }
1243 }
1244
1245 /*
1246  * This needs to be a tasklet otherwise we will
1247  * end up recursively calling this function.
1248  */
1249 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1250 {
1251         unsigned long flags;
1252
1253         spin_lock_irqsave(&serial->serial_lock, flags);
1254         if ((serial->parent->port_spec & HSO_INTF_MUX))
1255                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1256         else
1257                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1258         spin_unlock_irqrestore(&serial->serial_lock, flags);
1259 }
1260
1261 static  void hso_unthrottle(struct tty_struct *tty)
1262 {
1263         struct hso_serial *serial = get_serial_by_tty(tty);
1264
1265         tasklet_hi_schedule(&serial->unthrottle_tasklet);
1266 }
1267
1268 static void hso_unthrottle_workfunc(struct work_struct *work)
1269 {
1270         struct hso_serial *serial =
1271             container_of(work, struct hso_serial,
1272                          retry_unthrottle_workqueue);
1273         hso_unthrottle_tasklet(serial);
1274 }
1275
1276 /* open the requested serial port */
1277 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1278 {
1279         struct hso_serial *serial = get_serial_by_index(tty->index);
1280         int result;
1281
1282         /* sanity check */
1283         if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1284                 WARN_ON(1);
1285                 tty->driver_data = NULL;
1286                 D1("Failed to open port");
1287                 return -ENODEV;
1288         }
1289
1290         mutex_lock(&serial->parent->mutex);
1291         result = usb_autopm_get_interface(serial->parent->interface);
1292         if (result < 0)
1293                 goto err_out;
1294
1295         D1("Opening %d", serial->minor);
1296         kref_get(&serial->parent->ref);
1297
1298         /* setup */
1299         spin_lock_irq(&serial->serial_lock);
1300         tty->driver_data = serial;
1301         tty_kref_put(serial->tty);
1302         serial->tty = tty_kref_get(tty);
1303         spin_unlock_irq(&serial->serial_lock);
1304
1305         /* check for port already opened, if not set the termios */
1306         serial->open_count++;
1307         if (serial->open_count == 1) {
1308                 tty->low_latency = 1;
1309                 serial->rx_state = RX_IDLE;
1310                 /* Force default termio settings */
1311                 _hso_serial_set_termios(tty, NULL);
1312                 tasklet_init(&serial->unthrottle_tasklet,
1313                              (void (*)(unsigned long))hso_unthrottle_tasklet,
1314                              (unsigned long)serial);
1315                 INIT_WORK(&serial->retry_unthrottle_workqueue,
1316                           hso_unthrottle_workfunc);
1317                 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1318                 if (result) {
1319                         hso_stop_serial_device(serial->parent);
1320                         serial->open_count--;
1321                         kref_put(&serial->parent->ref, hso_serial_ref_free);
1322                 }
1323         } else {
1324                 D1("Port was already open");
1325         }
1326
1327         usb_autopm_put_interface(serial->parent->interface);
1328
1329         /* done */
1330         if (result)
1331                 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0);
1332 err_out:
1333         mutex_unlock(&serial->parent->mutex);
1334         return result;
1335 }
1336
1337 /* close the requested serial port */
1338 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1339 {
1340         struct hso_serial *serial = tty->driver_data;
1341         u8 usb_gone;
1342
1343         D1("Closing serial port");
1344
1345         /* Open failed, no close cleanup required */
1346         if (serial == NULL)
1347                 return;
1348
1349         mutex_lock(&serial->parent->mutex);
1350         usb_gone = serial->parent->usb_gone;
1351
1352         if (!usb_gone)
1353                 usb_autopm_get_interface(serial->parent->interface);
1354
1355         /* reset the rts and dtr */
1356         /* do the actual close */
1357         serial->open_count--;
1358         kref_put(&serial->parent->ref, hso_serial_ref_free);
1359         if (serial->open_count <= 0) {
1360                 serial->open_count = 0;
1361                 spin_lock_irq(&serial->serial_lock);
1362                 if (serial->tty == tty) {
1363                         serial->tty->driver_data = NULL;
1364                         serial->tty = NULL;
1365                         tty_kref_put(tty);
1366                 }
1367                 spin_unlock_irq(&serial->serial_lock);
1368                 if (!usb_gone)
1369                         hso_stop_serial_device(serial->parent);
1370                 tasklet_kill(&serial->unthrottle_tasklet);
1371                 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1372         }
1373
1374         if (!usb_gone)
1375                 usb_autopm_put_interface(serial->parent->interface);
1376
1377         mutex_unlock(&serial->parent->mutex);
1378 }
1379
1380 /* close the requested serial port */
1381 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1382                             int count)
1383 {
1384         struct hso_serial *serial = get_serial_by_tty(tty);
1385         int space, tx_bytes;
1386         unsigned long flags;
1387
1388         /* sanity check */
1389         if (serial == NULL) {
1390                 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1391                 return -ENODEV;
1392         }
1393
1394         spin_lock_irqsave(&serial->serial_lock, flags);
1395
1396         space = serial->tx_data_length - serial->tx_buffer_count;
1397         tx_bytes = (count < space) ? count : space;
1398
1399         if (!tx_bytes)
1400                 goto out;
1401
1402         memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1403         serial->tx_buffer_count += tx_bytes;
1404
1405 out:
1406         spin_unlock_irqrestore(&serial->serial_lock, flags);
1407
1408         hso_kick_transmit(serial);
1409         /* done */
1410         return tx_bytes;
1411 }
1412
1413 /* how much room is there for writing */
1414 static int hso_serial_write_room(struct tty_struct *tty)
1415 {
1416         struct hso_serial *serial = get_serial_by_tty(tty);
1417         int room;
1418         unsigned long flags;
1419
1420         spin_lock_irqsave(&serial->serial_lock, flags);
1421         room = serial->tx_data_length - serial->tx_buffer_count;
1422         spin_unlock_irqrestore(&serial->serial_lock, flags);
1423
1424         /* return free room */
1425         return room;
1426 }
1427
1428 /* setup the term */
1429 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1430 {
1431         struct hso_serial *serial = get_serial_by_tty(tty);
1432         unsigned long flags;
1433
1434         if (old)
1435                 D5("Termios called with: cflags new[%d] - old[%d]",
1436                    tty->termios->c_cflag, old->c_cflag);
1437
1438         /* the actual setup */
1439         spin_lock_irqsave(&serial->serial_lock, flags);
1440         if (serial->open_count)
1441                 _hso_serial_set_termios(tty, old);
1442         else
1443                 tty->termios = old;
1444         spin_unlock_irqrestore(&serial->serial_lock, flags);
1445
1446         /* done */
1447         return;
1448 }
1449
1450 /* how many characters in the buffer */
1451 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1452 {
1453         struct hso_serial *serial = get_serial_by_tty(tty);
1454         int chars;
1455         unsigned long flags;
1456
1457         /* sanity check */
1458         if (serial == NULL)
1459                 return 0;
1460
1461         spin_lock_irqsave(&serial->serial_lock, flags);
1462         chars = serial->tx_buffer_count;
1463         spin_unlock_irqrestore(&serial->serial_lock, flags);
1464
1465         return chars;
1466 }
1467 static int tiocmget_submit_urb(struct hso_serial *serial,
1468                                struct hso_tiocmget *tiocmget,
1469                                struct usb_device *usb)
1470 {
1471         int result;
1472
1473         if (serial->parent->usb_gone)
1474                 return -ENODEV;
1475         usb_fill_int_urb(tiocmget->urb, usb,
1476                          usb_rcvintpipe(usb,
1477                                         tiocmget->endp->
1478                                         bEndpointAddress & 0x7F),
1479                          &tiocmget->serial_state_notification,
1480                          sizeof(struct hso_serial_state_notification),
1481                          tiocmget_intr_callback, serial,
1482                          tiocmget->endp->bInterval);
1483         result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1484         if (result) {
1485                 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1486                          result);
1487         }
1488         return result;
1489
1490 }
1491
1492 static void tiocmget_intr_callback(struct urb *urb)
1493 {
1494         struct hso_serial *serial = urb->context;
1495         struct hso_tiocmget *tiocmget;
1496         int status = urb->status;
1497         u16 UART_state_bitmap, prev_UART_state_bitmap;
1498         struct uart_icount *icount;
1499         struct hso_serial_state_notification *serial_state_notification;
1500         struct usb_device *usb;
1501
1502         /* Sanity checks */
1503         if (!serial)
1504                 return;
1505         if (status) {
1506                 log_usb_status(status, __func__);
1507                 return;
1508         }
1509         tiocmget = serial->tiocmget;
1510         if (!tiocmget)
1511                 return;
1512         usb = serial->parent->usb;
1513         serial_state_notification = &tiocmget->serial_state_notification;
1514         if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1515             serial_state_notification->bNotification != B_NOTIFICATION ||
1516             le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1517             le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1518             le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1519                 dev_warn(&usb->dev,
1520                          "hso received invalid serial state notification\n");
1521                 DUMP(serial_state_notification,
1522                      sizeof(hso_serial_state_notifation))
1523         } else {
1524
1525                 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1526                                                 UART_state_bitmap);
1527                 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1528                 icount = &tiocmget->icount;
1529                 spin_lock(&serial->serial_lock);
1530                 if ((UART_state_bitmap & B_OVERRUN) !=
1531                    (prev_UART_state_bitmap & B_OVERRUN))
1532                         icount->parity++;
1533                 if ((UART_state_bitmap & B_PARITY) !=
1534                    (prev_UART_state_bitmap & B_PARITY))
1535                         icount->parity++;
1536                 if ((UART_state_bitmap & B_FRAMING) !=
1537                    (prev_UART_state_bitmap & B_FRAMING))
1538                         icount->frame++;
1539                 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1540                    !(prev_UART_state_bitmap & B_RING_SIGNAL))
1541                         icount->rng++;
1542                 if ((UART_state_bitmap & B_BREAK) !=
1543                    (prev_UART_state_bitmap & B_BREAK))
1544                         icount->brk++;
1545                 if ((UART_state_bitmap & B_TX_CARRIER) !=
1546                    (prev_UART_state_bitmap & B_TX_CARRIER))
1547                         icount->dsr++;
1548                 if ((UART_state_bitmap & B_RX_CARRIER) !=
1549                    (prev_UART_state_bitmap & B_RX_CARRIER))
1550                         icount->dcd++;
1551                 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1552                 spin_unlock(&serial->serial_lock);
1553                 tiocmget->intr_completed = 1;
1554                 wake_up_interruptible(&tiocmget->waitq);
1555         }
1556         memset(serial_state_notification, 0,
1557                sizeof(struct hso_serial_state_notification));
1558         tiocmget_submit_urb(serial,
1559                             tiocmget,
1560                             serial->parent->usb);
1561 }
1562
1563 /*
1564  * next few functions largely stolen from drivers/serial/serial_core.c
1565  */
1566 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1567  * - mask passed in arg for lines of interest
1568  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1569  * Caller should use TIOCGICOUNT to see which one it was
1570  */
1571 static int
1572 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1573 {
1574         DECLARE_WAITQUEUE(wait, current);
1575         struct uart_icount cprev, cnow;
1576         struct hso_tiocmget  *tiocmget;
1577         int ret;
1578
1579         tiocmget = serial->tiocmget;
1580         if (!tiocmget)
1581                 return -ENOENT;
1582         /*
1583          * note the counters on entry
1584          */
1585         spin_lock_irq(&serial->serial_lock);
1586         memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1587         spin_unlock_irq(&serial->serial_lock);
1588         add_wait_queue(&tiocmget->waitq, &wait);
1589         for (;;) {
1590                 spin_lock_irq(&serial->serial_lock);
1591                 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1592                 spin_unlock_irq(&serial->serial_lock);
1593                 set_current_state(TASK_INTERRUPTIBLE);
1594                 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1595                     ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1596                     ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd))) {
1597                         ret = 0;
1598                         break;
1599                 }
1600                 schedule();
1601                 /* see if a signal did it */
1602                 if (signal_pending(current)) {
1603                         ret = -ERESTARTSYS;
1604                         break;
1605                 }
1606                 cprev = cnow;
1607         }
1608         current->state = TASK_RUNNING;
1609         remove_wait_queue(&tiocmget->waitq, &wait);
1610
1611         return ret;
1612 }
1613
1614 /*
1615  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1616  * Return: write counters to the user passed counter struct
1617  * NB: both 1->0 and 0->1 transitions are counted except for
1618  *     RI where only 0->1 is counted.
1619  */
1620 static int hso_get_count(struct hso_serial *serial,
1621                           struct serial_icounter_struct __user *icnt)
1622 {
1623         struct serial_icounter_struct icount;
1624         struct uart_icount cnow;
1625         struct hso_tiocmget  *tiocmget = serial->tiocmget;
1626
1627         if (!tiocmget)
1628                  return -ENOENT;
1629         spin_lock_irq(&serial->serial_lock);
1630         memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1631         spin_unlock_irq(&serial->serial_lock);
1632
1633         icount.cts         = cnow.cts;
1634         icount.dsr         = cnow.dsr;
1635         icount.rng         = cnow.rng;
1636         icount.dcd         = cnow.dcd;
1637         icount.rx          = cnow.rx;
1638         icount.tx          = cnow.tx;
1639         icount.frame       = cnow.frame;
1640         icount.overrun     = cnow.overrun;
1641         icount.parity      = cnow.parity;
1642         icount.brk         = cnow.brk;
1643         icount.buf_overrun = cnow.buf_overrun;
1644
1645         return copy_to_user(icnt, &icount, sizeof(icount)) ? -EFAULT : 0;
1646 }
1647
1648
1649 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
1650 {
1651         int retval;
1652         struct hso_serial *serial = get_serial_by_tty(tty);
1653         struct hso_tiocmget  *tiocmget;
1654         u16 UART_state_bitmap;
1655
1656         /* sanity check */
1657         if (!serial) {
1658                 D1("no tty structures");
1659                 return -EINVAL;
1660         }
1661         spin_lock_irq(&serial->serial_lock);
1662         retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1663             ((serial->dtr_state) ? TIOCM_DTR : 0);
1664         tiocmget = serial->tiocmget;
1665         if (tiocmget) {
1666
1667                 UART_state_bitmap = le16_to_cpu(
1668                         tiocmget->prev_UART_state_bitmap);
1669                 if (UART_state_bitmap & B_RING_SIGNAL)
1670                         retval |=  TIOCM_RNG;
1671                 if (UART_state_bitmap & B_RX_CARRIER)
1672                         retval |=  TIOCM_CD;
1673                 if (UART_state_bitmap & B_TX_CARRIER)
1674                         retval |=  TIOCM_DSR;
1675         }
1676         spin_unlock_irq(&serial->serial_lock);
1677         return retval;
1678 }
1679
1680 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
1681                                unsigned int set, unsigned int clear)
1682 {
1683         int val = 0;
1684         unsigned long flags;
1685         int if_num;
1686         struct hso_serial *serial = get_serial_by_tty(tty);
1687
1688         /* sanity check */
1689         if (!serial) {
1690                 D1("no tty structures");
1691                 return -EINVAL;
1692         }
1693         if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1694
1695         spin_lock_irqsave(&serial->serial_lock, flags);
1696         if (set & TIOCM_RTS)
1697                 serial->rts_state = 1;
1698         if (set & TIOCM_DTR)
1699                 serial->dtr_state = 1;
1700
1701         if (clear & TIOCM_RTS)
1702                 serial->rts_state = 0;
1703         if (clear & TIOCM_DTR)
1704                 serial->dtr_state = 0;
1705
1706         if (serial->dtr_state)
1707                 val |= 0x01;
1708         if (serial->rts_state)
1709                 val |= 0x02;
1710
1711         spin_unlock_irqrestore(&serial->serial_lock, flags);
1712
1713         return usb_control_msg(serial->parent->usb,
1714                                usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1715                                0x21, val, if_num, NULL, 0,
1716                                USB_CTRL_SET_TIMEOUT);
1717 }
1718
1719 static int hso_serial_ioctl(struct tty_struct *tty, struct file *file,
1720                             unsigned int cmd, unsigned long arg)
1721 {
1722         struct hso_serial *serial =  get_serial_by_tty(tty);
1723         void __user *uarg = (void __user *)arg;
1724         int ret = 0;
1725         D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1726
1727         if (!serial)
1728                 return -ENODEV;
1729         switch (cmd) {
1730         case TIOCMIWAIT:
1731                 ret = hso_wait_modem_status(serial, arg);
1732                 break;
1733
1734         case TIOCGICOUNT:
1735                 ret = hso_get_count(serial, uarg);
1736                 break;
1737         default:
1738                 ret = -ENOIOCTLCMD;
1739                 break;
1740         }
1741         return ret;
1742 }
1743
1744
1745 /* starts a transmit */
1746 static void hso_kick_transmit(struct hso_serial *serial)
1747 {
1748         u8 *temp;
1749         unsigned long flags;
1750         int res;
1751
1752         spin_lock_irqsave(&serial->serial_lock, flags);
1753         if (!serial->tx_buffer_count)
1754                 goto out;
1755
1756         if (serial->tx_urb_used)
1757                 goto out;
1758
1759         /* Wakeup USB interface if necessary */
1760         if (hso_get_activity(serial->parent) == -EAGAIN)
1761                 goto out;
1762
1763         /* Switch pointers around to avoid memcpy */
1764         temp = serial->tx_buffer;
1765         serial->tx_buffer = serial->tx_data;
1766         serial->tx_data = temp;
1767         serial->tx_data_count = serial->tx_buffer_count;
1768         serial->tx_buffer_count = 0;
1769
1770         /* If temp is set, it means we switched buffers */
1771         if (temp && serial->write_data) {
1772                 res = serial->write_data(serial);
1773                 if (res >= 0)
1774                         serial->tx_urb_used = 1;
1775         }
1776 out:
1777         spin_unlock_irqrestore(&serial->serial_lock, flags);
1778 }
1779
1780 /* make a request (for reading and writing data to muxed serial port) */
1781 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1782                               struct urb *ctrl_urb,
1783                               struct usb_ctrlrequest *ctrl_req,
1784                               u8 *ctrl_urb_data, u32 size)
1785 {
1786         int result;
1787         int pipe;
1788
1789         /* Sanity check */
1790         if (!serial || !ctrl_urb || !ctrl_req) {
1791                 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1792                 return -EINVAL;
1793         }
1794
1795         /* initialize */
1796         ctrl_req->wValue = 0;
1797         ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1798         ctrl_req->wLength = cpu_to_le16(size);
1799
1800         if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1801                 /* Reading command */
1802                 ctrl_req->bRequestType = USB_DIR_IN |
1803                                          USB_TYPE_OPTION_VENDOR |
1804                                          USB_RECIP_INTERFACE;
1805                 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1806                 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1807         } else {
1808                 /* Writing command */
1809                 ctrl_req->bRequestType = USB_DIR_OUT |
1810                                          USB_TYPE_OPTION_VENDOR |
1811                                          USB_RECIP_INTERFACE;
1812                 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1813                 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1814         }
1815         /* syslog */
1816         D2("%s command (%02x) len: %d, port: %d",
1817            type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1818            ctrl_req->bRequestType, ctrl_req->wLength, port);
1819
1820         /* Load ctrl urb */
1821         ctrl_urb->transfer_flags = 0;
1822         usb_fill_control_urb(ctrl_urb,
1823                              serial->parent->usb,
1824                              pipe,
1825                              (u8 *) ctrl_req,
1826                              ctrl_urb_data, size, ctrl_callback, serial);
1827         /* Send it on merry way */
1828         result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1829         if (result) {
1830                 dev_err(&ctrl_urb->dev->dev,
1831                         "%s failed submit ctrl_urb %d type %d", __func__,
1832                         result, type);
1833                 return result;
1834         }
1835
1836         /* done */
1837         return size;
1838 }
1839
1840 /* called by intr_callback when read occurs */
1841 static int hso_mux_serial_read(struct hso_serial *serial)
1842 {
1843         if (!serial)
1844                 return -EINVAL;
1845
1846         /* clean data */
1847         memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1848         /* make the request */
1849
1850         if (serial->num_rx_urbs != 1) {
1851                 dev_err(&serial->parent->interface->dev,
1852                         "ERROR: mux'd reads with multiple buffers "
1853                         "not possible\n");
1854                 return 0;
1855         }
1856         return mux_device_request(serial,
1857                                   USB_CDC_GET_ENCAPSULATED_RESPONSE,
1858                                   serial->parent->port_spec & HSO_PORT_MASK,
1859                                   serial->rx_urb[0],
1860                                   &serial->ctrl_req_rx,
1861                                   serial->rx_data[0], serial->rx_data_length);
1862 }
1863
1864 /* used for muxed serial port callback (muxed serial read) */
1865 static void intr_callback(struct urb *urb)
1866 {
1867         struct hso_shared_int *shared_int = urb->context;
1868         struct hso_serial *serial;
1869         unsigned char *port_req;
1870         int status = urb->status;
1871         int i;
1872
1873         usb_mark_last_busy(urb->dev);
1874
1875         /* sanity check */
1876         if (!shared_int)
1877                 return;
1878
1879         /* status check */
1880         if (status) {
1881                 log_usb_status(status, __func__);
1882                 return;
1883         }
1884         D4("\n--- Got intr callback 0x%02X ---", status);
1885
1886         /* what request? */
1887         port_req = urb->transfer_buffer;
1888         D4(" port_req = 0x%.2X\n", *port_req);
1889         /* loop over all muxed ports to find the one sending this */
1890         for (i = 0; i < 8; i++) {
1891                 /* max 8 channels on MUX */
1892                 if (*port_req & (1 << i)) {
1893                         serial = get_serial_by_shared_int_and_type(shared_int,
1894                                                                    (1 << i));
1895                         if (serial != NULL) {
1896                                 D1("Pending read interrupt on port %d\n", i);
1897                                 spin_lock(&serial->serial_lock);
1898                                 if (serial->rx_state == RX_IDLE) {
1899                                         /* Setup and send a ctrl req read on
1900                                          * port i */
1901                                 if (!serial->rx_urb_filled[0]) {
1902                                                 serial->rx_state = RX_SENT;
1903                                                 hso_mux_serial_read(serial);
1904                                         } else
1905                                                 serial->rx_state = RX_PENDING;
1906
1907                                 } else {
1908                                         D1("Already pending a read on "
1909                                            "port %d\n", i);
1910                                 }
1911                                 spin_unlock(&serial->serial_lock);
1912                         }
1913                 }
1914         }
1915         /* Resubmit interrupt urb */
1916         hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1917 }
1918
1919 /* called for writing to muxed serial port */
1920 static int hso_mux_serial_write_data(struct hso_serial *serial)
1921 {
1922         if (NULL == serial)
1923                 return -EINVAL;
1924
1925         return mux_device_request(serial,
1926                                   USB_CDC_SEND_ENCAPSULATED_COMMAND,
1927                                   serial->parent->port_spec & HSO_PORT_MASK,
1928                                   serial->tx_urb,
1929                                   &serial->ctrl_req_tx,
1930                                   serial->tx_data, serial->tx_data_count);
1931 }
1932
1933 /* write callback for Diag and CS port */
1934 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1935 {
1936         struct hso_serial *serial = urb->context;
1937         int status = urb->status;
1938         struct tty_struct *tty;
1939
1940         /* sanity check */
1941         if (!serial) {
1942                 D1("serial == NULL");
1943                 return;
1944         }
1945
1946         spin_lock(&serial->serial_lock);
1947         serial->tx_urb_used = 0;
1948         tty = tty_kref_get(serial->tty);
1949         spin_unlock(&serial->serial_lock);
1950         if (status) {
1951                 log_usb_status(status, __func__);
1952                 tty_kref_put(tty);
1953                 return;
1954         }
1955         hso_put_activity(serial->parent);
1956         if (tty) {
1957                 tty_wakeup(tty);
1958                 tty_kref_put(tty);
1959         }
1960         hso_kick_transmit(serial);
1961
1962         D1(" ");
1963         return;
1964 }
1965
1966 /* called for writing diag or CS serial port */
1967 static int hso_std_serial_write_data(struct hso_serial *serial)
1968 {
1969         int count = serial->tx_data_count;
1970         int result;
1971
1972         usb_fill_bulk_urb(serial->tx_urb,
1973                           serial->parent->usb,
1974                           usb_sndbulkpipe(serial->parent->usb,
1975                                           serial->out_endp->
1976                                           bEndpointAddress & 0x7F),
1977                           serial->tx_data, serial->tx_data_count,
1978                           hso_std_serial_write_bulk_callback, serial);
1979
1980         result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1981         if (result) {
1982                 dev_warn(&serial->parent->usb->dev,
1983                          "Failed to submit urb - res %d\n", result);
1984                 return result;
1985         }
1986
1987         return count;
1988 }
1989
1990 /* callback after read or write on muxed serial port */
1991 static void ctrl_callback(struct urb *urb)
1992 {
1993         struct hso_serial *serial = urb->context;
1994         struct usb_ctrlrequest *req;
1995         int status = urb->status;
1996         struct tty_struct *tty;
1997
1998         /* sanity check */
1999         if (!serial)
2000                 return;
2001
2002         spin_lock(&serial->serial_lock);
2003         serial->tx_urb_used = 0;
2004         tty = tty_kref_get(serial->tty);
2005         spin_unlock(&serial->serial_lock);
2006         if (status) {
2007                 log_usb_status(status, __func__);
2008                 tty_kref_put(tty);
2009                 return;
2010         }
2011
2012         /* what request? */
2013         req = (struct usb_ctrlrequest *)(urb->setup_packet);
2014         D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2015         D4("Actual length of urb = %d\n", urb->actual_length);
2016         DUMP1(urb->transfer_buffer, urb->actual_length);
2017
2018         if (req->bRequestType ==
2019             (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2020                 /* response to a read command */
2021                 serial->rx_urb_filled[0] = 1;
2022                 spin_lock(&serial->serial_lock);
2023                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2024                 spin_unlock(&serial->serial_lock);
2025         } else {
2026                 hso_put_activity(serial->parent);
2027                 if (tty)
2028                         tty_wakeup(tty);
2029                 /* response to a write command */
2030                 hso_kick_transmit(serial);
2031         }
2032         tty_kref_put(tty);
2033 }
2034
2035 /* handle RX data for serial port */
2036 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2037 {
2038         struct tty_struct *tty;
2039         int write_length_remaining = 0;
2040         int curr_write_len;
2041
2042         /* Sanity check */
2043         if (urb == NULL || serial == NULL) {
2044                 D1("serial = NULL");
2045                 return -2;
2046         }
2047
2048         /* All callers to put_rxbuf_data hold serial_lock */
2049         tty = tty_kref_get(serial->tty);
2050
2051         /* Push data to tty */
2052         if (tty) {
2053                 write_length_remaining = urb->actual_length -
2054                         serial->curr_rx_urb_offset;
2055                 D1("data to push to tty");
2056                 while (write_length_remaining) {
2057                         if (test_bit(TTY_THROTTLED, &tty->flags)) {
2058                                 tty_kref_put(tty);
2059                                 return -1;
2060                         }
2061                         curr_write_len =  tty_insert_flip_string
2062                                 (tty, urb->transfer_buffer +
2063                                  serial->curr_rx_urb_offset,
2064                                  write_length_remaining);
2065                         serial->curr_rx_urb_offset += curr_write_len;
2066                         write_length_remaining -= curr_write_len;
2067                         tty_flip_buffer_push(tty);
2068                 }
2069         }
2070         if (write_length_remaining == 0) {
2071                 serial->curr_rx_urb_offset = 0;
2072                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2073         }
2074         tty_kref_put(tty);
2075         return write_length_remaining;
2076 }
2077
2078
2079 /* Base driver functions */
2080
2081 static void hso_log_port(struct hso_device *hso_dev)
2082 {
2083         char *port_type;
2084         char port_dev[20];
2085
2086         switch (hso_dev->port_spec & HSO_PORT_MASK) {
2087         case HSO_PORT_CONTROL:
2088                 port_type = "Control";
2089                 break;
2090         case HSO_PORT_APP:
2091                 port_type = "Application";
2092                 break;
2093         case HSO_PORT_GPS:
2094                 port_type = "GPS";
2095                 break;
2096         case HSO_PORT_GPS_CONTROL:
2097                 port_type = "GPS control";
2098                 break;
2099         case HSO_PORT_APP2:
2100                 port_type = "Application2";
2101                 break;
2102         case HSO_PORT_PCSC:
2103                 port_type = "PCSC";
2104                 break;
2105         case HSO_PORT_DIAG:
2106                 port_type = "Diagnostic";
2107                 break;
2108         case HSO_PORT_DIAG2:
2109                 port_type = "Diagnostic2";
2110                 break;
2111         case HSO_PORT_MODEM:
2112                 port_type = "Modem";
2113                 break;
2114         case HSO_PORT_NETWORK:
2115                 port_type = "Network";
2116                 break;
2117         default:
2118                 port_type = "Unknown";
2119                 break;
2120         }
2121         if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2122                 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2123         } else
2124                 sprintf(port_dev, "/dev/%s%d", tty_filename,
2125                         dev2ser(hso_dev)->minor);
2126
2127         dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2128                 port_type, port_dev);
2129 }
2130
2131 static int hso_start_net_device(struct hso_device *hso_dev)
2132 {
2133         int i, result = 0;
2134         struct hso_net *hso_net = dev2net(hso_dev);
2135
2136         if (!hso_net)
2137                 return -ENODEV;
2138
2139         /* send URBs for all read buffers */
2140         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2141
2142                 /* Prep a receive URB */
2143                 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2144                                   hso_dev->usb,
2145                                   usb_rcvbulkpipe(hso_dev->usb,
2146                                                   hso_net->in_endp->
2147                                                   bEndpointAddress & 0x7F),
2148                                   hso_net->mux_bulk_rx_buf_pool[i],
2149                                   MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2150                                   hso_net);
2151
2152                 /* Put it out there so the device can send us stuff */
2153                 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2154                                         GFP_NOIO);
2155                 if (result)
2156                         dev_warn(&hso_dev->usb->dev,
2157                                 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2158                                 i, result);
2159         }
2160
2161         return result;
2162 }
2163
2164 static int hso_stop_net_device(struct hso_device *hso_dev)
2165 {
2166         int i;
2167         struct hso_net *hso_net = dev2net(hso_dev);
2168
2169         if (!hso_net)
2170                 return -ENODEV;
2171
2172         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2173                 if (hso_net->mux_bulk_rx_urb_pool[i])
2174                         usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2175
2176         }
2177         if (hso_net->mux_bulk_tx_urb)
2178                 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2179
2180         return 0;
2181 }
2182
2183 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2184 {
2185         int i, result = 0;
2186         struct hso_serial *serial = dev2ser(hso_dev);
2187
2188         if (!serial)
2189                 return -ENODEV;
2190
2191         /* If it is not the MUX port fill in and submit a bulk urb (already
2192          * allocated in hso_serial_start) */
2193         if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2194                 for (i = 0; i < serial->num_rx_urbs; i++) {
2195                         usb_fill_bulk_urb(serial->rx_urb[i],
2196                                           serial->parent->usb,
2197                                           usb_rcvbulkpipe(serial->parent->usb,
2198                                                           serial->in_endp->
2199                                                           bEndpointAddress &
2200                                                           0x7F),
2201                                           serial->rx_data[i],
2202                                           serial->rx_data_length,
2203                                           hso_std_serial_read_bulk_callback,
2204                                           serial);
2205                         result = usb_submit_urb(serial->rx_urb[i], flags);
2206                         if (result) {
2207                                 dev_warn(&serial->parent->usb->dev,
2208                                          "Failed to submit urb - res %d\n",
2209                                          result);
2210                                 break;
2211                         }
2212                 }
2213         } else {
2214                 mutex_lock(&serial->shared_int->shared_int_lock);
2215                 if (!serial->shared_int->use_count) {
2216                         result =
2217                             hso_mux_submit_intr_urb(serial->shared_int,
2218                                                     hso_dev->usb, flags);
2219                 }
2220                 serial->shared_int->use_count++;
2221                 mutex_unlock(&serial->shared_int->shared_int_lock);
2222         }
2223         if (serial->tiocmget)
2224                 tiocmget_submit_urb(serial,
2225                                     serial->tiocmget,
2226                                     serial->parent->usb);
2227         return result;
2228 }
2229
2230 static int hso_stop_serial_device(struct hso_device *hso_dev)
2231 {
2232         int i;
2233         struct hso_serial *serial = dev2ser(hso_dev);
2234         struct hso_tiocmget  *tiocmget;
2235
2236         if (!serial)
2237                 return -ENODEV;
2238
2239         for (i = 0; i < serial->num_rx_urbs; i++) {
2240                 if (serial->rx_urb[i]) {
2241                                 usb_kill_urb(serial->rx_urb[i]);
2242                                 serial->rx_urb_filled[i] = 0;
2243                 }
2244         }
2245         serial->curr_rx_urb_idx = 0;
2246         serial->curr_rx_urb_offset = 0;
2247
2248         if (serial->tx_urb)
2249                 usb_kill_urb(serial->tx_urb);
2250
2251         if (serial->shared_int) {
2252                 mutex_lock(&serial->shared_int->shared_int_lock);
2253                 if (serial->shared_int->use_count &&
2254                     (--serial->shared_int->use_count == 0)) {
2255                         struct urb *urb;
2256
2257                         urb = serial->shared_int->shared_intr_urb;
2258                         if (urb)
2259                                 usb_kill_urb(urb);
2260                 }
2261                 mutex_unlock(&serial->shared_int->shared_int_lock);
2262         }
2263         tiocmget = serial->tiocmget;
2264         if (tiocmget) {
2265                 wake_up_interruptible(&tiocmget->waitq);
2266                 usb_kill_urb(tiocmget->urb);
2267         }
2268
2269         return 0;
2270 }
2271
2272 static void hso_serial_common_free(struct hso_serial *serial)
2273 {
2274         int i;
2275
2276         if (serial->parent->dev)
2277                 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2278
2279         tty_unregister_device(tty_drv, serial->minor);
2280
2281         for (i = 0; i < serial->num_rx_urbs; i++) {
2282                 /* unlink and free RX URB */
2283                 usb_free_urb(serial->rx_urb[i]);
2284                 /* free the RX buffer */
2285                 kfree(serial->rx_data[i]);
2286         }
2287
2288         /* unlink and free TX URB */
2289         usb_free_urb(serial->tx_urb);
2290         kfree(serial->tx_data);
2291 }
2292
2293 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2294                                     int rx_size, int tx_size)
2295 {
2296         struct device *dev;
2297         int minor;
2298         int i;
2299
2300         minor = get_free_serial_index();
2301         if (minor < 0)
2302                 goto exit;
2303
2304         /* register our minor number */
2305         serial->parent->dev = tty_register_device(tty_drv, minor,
2306                                         &serial->parent->interface->dev);
2307         dev = serial->parent->dev;
2308         dev->driver_data = serial->parent;
2309         i = device_create_file(dev, &dev_attr_hsotype);
2310
2311         /* fill in specific data for later use */
2312         serial->minor = minor;
2313         serial->magic = HSO_SERIAL_MAGIC;
2314         spin_lock_init(&serial->serial_lock);
2315         serial->num_rx_urbs = num_urbs;
2316
2317         /* RX, allocate urb and initialize */
2318
2319         /* prepare our RX buffer */
2320         serial->rx_data_length = rx_size;
2321         for (i = 0; i < serial->num_rx_urbs; i++) {
2322                 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2323                 if (!serial->rx_urb[i]) {
2324                         dev_err(dev, "Could not allocate urb?\n");
2325                         goto exit;
2326                 }
2327                 serial->rx_urb[i]->transfer_buffer = NULL;
2328                 serial->rx_urb[i]->transfer_buffer_length = 0;
2329                 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2330                                              GFP_KERNEL);
2331                 if (!serial->rx_data[i]) {
2332                         dev_err(dev, "%s - Out of memory\n", __func__);
2333                         goto exit;
2334                 }
2335         }
2336
2337         /* TX, allocate urb and initialize */
2338         serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2339         if (!serial->tx_urb) {
2340                 dev_err(dev, "Could not allocate urb?\n");
2341                 goto exit;
2342         }
2343         serial->tx_urb->transfer_buffer = NULL;
2344         serial->tx_urb->transfer_buffer_length = 0;
2345         /* prepare our TX buffer */
2346         serial->tx_data_count = 0;
2347         serial->tx_buffer_count = 0;
2348         serial->tx_data_length = tx_size;
2349         serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2350         if (!serial->tx_data) {
2351                 dev_err(dev, "%s - Out of memory", __func__);
2352                 goto exit;
2353         }
2354         serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2355         if (!serial->tx_buffer) {
2356                 dev_err(dev, "%s - Out of memory", __func__);
2357                 goto exit;
2358         }
2359
2360         return 0;
2361 exit:
2362         hso_serial_common_free(serial);
2363         return -1;
2364 }
2365
2366 /* Creates a general hso device */
2367 static struct hso_device *hso_create_device(struct usb_interface *intf,
2368                                             int port_spec)
2369 {
2370         struct hso_device *hso_dev;
2371
2372         hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2373         if (!hso_dev)
2374                 return NULL;
2375
2376         hso_dev->port_spec = port_spec;
2377         hso_dev->usb = interface_to_usbdev(intf);
2378         hso_dev->interface = intf;
2379         kref_init(&hso_dev->ref);
2380         mutex_init(&hso_dev->mutex);
2381
2382         INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2383         INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2384
2385         return hso_dev;
2386 }
2387
2388 /* Removes a network device in the network device table */
2389 static int remove_net_device(struct hso_device *hso_dev)
2390 {
2391         int i;
2392
2393         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2394                 if (network_table[i] == hso_dev) {
2395                         network_table[i] = NULL;
2396                         break;
2397                 }
2398         }
2399         if (i == HSO_MAX_NET_DEVICES)
2400                 return -1;
2401         return 0;
2402 }
2403
2404 /* Frees our network device */
2405 static void hso_free_net_device(struct hso_device *hso_dev)
2406 {
2407         int i;
2408         struct hso_net *hso_net = dev2net(hso_dev);
2409
2410         if (!hso_net)
2411                 return;
2412
2413         /* start freeing */
2414         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2415                 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2416                 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2417         }
2418         usb_free_urb(hso_net->mux_bulk_tx_urb);
2419         kfree(hso_net->mux_bulk_tx_buf);
2420
2421         remove_net_device(hso_net->parent);
2422
2423         if (hso_net->net) {
2424                 unregister_netdev(hso_net->net);
2425                 free_netdev(hso_net->net);
2426         }
2427
2428         kfree(hso_dev);
2429 }
2430
2431 static const struct net_device_ops hso_netdev_ops = {
2432         .ndo_open       = hso_net_open,
2433         .ndo_stop       = hso_net_close,
2434         .ndo_start_xmit = hso_net_start_xmit,
2435         .ndo_tx_timeout = hso_net_tx_timeout,
2436 };
2437
2438 /* initialize the network interface */
2439 static void hso_net_init(struct net_device *net)
2440 {
2441         struct hso_net *hso_net = netdev_priv(net);
2442
2443         D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2444
2445         /* fill in the other fields */
2446         net->netdev_ops = &hso_netdev_ops;
2447         net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2448         net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2449         net->type = ARPHRD_NONE;
2450         net->mtu = DEFAULT_MTU - 14;
2451         net->tx_queue_len = 10;
2452         SET_ETHTOOL_OPS(net, &ops);
2453
2454         /* and initialize the semaphore */
2455         spin_lock_init(&hso_net->net_lock);
2456 }
2457
2458 /* Adds a network device in the network device table */
2459 static int add_net_device(struct hso_device *hso_dev)
2460 {
2461         int i;
2462
2463         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2464                 if (network_table[i] == NULL) {
2465                         network_table[i] = hso_dev;
2466                         break;
2467                 }
2468         }
2469         if (i == HSO_MAX_NET_DEVICES)
2470                 return -1;
2471         return 0;
2472 }
2473
2474 static int hso_radio_toggle(void *data, enum rfkill_state state)
2475 {
2476         struct hso_device *hso_dev = data;
2477         int enabled = (state == RFKILL_STATE_ON);
2478         int rv;
2479
2480         mutex_lock(&hso_dev->mutex);
2481         if (hso_dev->usb_gone)
2482                 rv = 0;
2483         else
2484                 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2485                                        enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2486                                        USB_CTRL_SET_TIMEOUT);
2487         mutex_unlock(&hso_dev->mutex);
2488         return rv;
2489 }
2490
2491 /* Creates and sets up everything for rfkill */
2492 static void hso_create_rfkill(struct hso_device *hso_dev,
2493                              struct usb_interface *interface)
2494 {
2495         struct hso_net *hso_net = dev2net(hso_dev);
2496         struct device *dev = &hso_net->net->dev;
2497         char *rfkn;
2498
2499         hso_net->rfkill = rfkill_allocate(&interface_to_usbdev(interface)->dev,
2500                                  RFKILL_TYPE_WWAN);
2501         if (!hso_net->rfkill) {
2502                 dev_err(dev, "%s - Out of memory\n", __func__);
2503                 return;
2504         }
2505         rfkn = kzalloc(20, GFP_KERNEL);
2506         if (!rfkn) {
2507                 rfkill_free(hso_net->rfkill);
2508                 hso_net->rfkill = NULL;
2509                 dev_err(dev, "%s - Out of memory\n", __func__);
2510                 return;
2511         }
2512         snprintf(rfkn, 20, "hso-%d",
2513                  interface->altsetting->desc.bInterfaceNumber);
2514         hso_net->rfkill->name = rfkn;
2515         hso_net->rfkill->state = RFKILL_STATE_ON;
2516         hso_net->rfkill->data = hso_dev;
2517         hso_net->rfkill->toggle_radio = hso_radio_toggle;
2518         if (rfkill_register(hso_net->rfkill) < 0) {
2519                 kfree(rfkn);
2520                 hso_net->rfkill->name = NULL;
2521                 rfkill_free(hso_net->rfkill);
2522                 hso_net->rfkill = NULL;
2523                 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2524                 return;
2525         }
2526 }
2527
2528 /* Creates our network device */
2529 static struct hso_device *hso_create_net_device(struct usb_interface *interface)
2530 {
2531         int result, i;
2532         struct net_device *net;
2533         struct hso_net *hso_net;
2534         struct hso_device *hso_dev;
2535
2536         hso_dev = hso_create_device(interface, HSO_INTF_MUX | HSO_PORT_NETWORK);
2537         if (!hso_dev)
2538                 return NULL;
2539
2540         /* allocate our network device, then we can put in our private data */
2541         /* call hso_net_init to do the basic initialization */
2542         net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2543         if (!net) {
2544                 dev_err(&interface->dev, "Unable to create ethernet device\n");
2545                 goto exit;
2546         }
2547
2548         hso_net = netdev_priv(net);
2549
2550         hso_dev->port_data.dev_net = hso_net;
2551         hso_net->net = net;
2552         hso_net->parent = hso_dev;
2553
2554         hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2555                                       USB_DIR_IN);
2556         if (!hso_net->in_endp) {
2557                 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2558                 goto exit;
2559         }
2560         hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2561                                        USB_DIR_OUT);
2562         if (!hso_net->out_endp) {
2563                 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2564                 goto exit;
2565         }
2566         SET_NETDEV_DEV(net, &interface->dev);
2567
2568         /* registering our net device */
2569         result = register_netdev(net);
2570         if (result) {
2571                 dev_err(&interface->dev, "Failed to register device\n");
2572                 goto exit;
2573         }
2574
2575         /* start allocating */
2576         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2577                 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2578                 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2579                         dev_err(&interface->dev, "Could not allocate rx urb\n");
2580                         goto exit;
2581                 }
2582                 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2583                                                            GFP_KERNEL);
2584                 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2585                         dev_err(&interface->dev, "Could not allocate rx buf\n");
2586                         goto exit;
2587                 }
2588         }
2589         hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2590         if (!hso_net->mux_bulk_tx_urb) {
2591                 dev_err(&interface->dev, "Could not allocate tx urb\n");
2592                 goto exit;
2593         }
2594         hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2595         if (!hso_net->mux_bulk_tx_buf) {
2596                 dev_err(&interface->dev, "Could not allocate tx buf\n");
2597                 goto exit;
2598         }
2599
2600         add_net_device(hso_dev);
2601
2602         hso_log_port(hso_dev);
2603
2604         hso_create_rfkill(hso_dev, interface);
2605
2606         return hso_dev;
2607 exit:
2608         hso_free_net_device(hso_dev);
2609         return NULL;
2610 }
2611
2612 static void hso_free_tiomget(struct hso_serial *serial)
2613 {
2614         struct hso_tiocmget *tiocmget = serial->tiocmget;
2615         if (tiocmget) {
2616                 kfree(tiocmget);
2617                 if (tiocmget->urb) {
2618                         usb_free_urb(tiocmget->urb);
2619                         tiocmget->urb = NULL;
2620                 }
2621                 serial->tiocmget = NULL;
2622
2623         }
2624 }
2625
2626 /* Frees an AT channel ( goes for both mux and non-mux ) */
2627 static void hso_free_serial_device(struct hso_device *hso_dev)
2628 {
2629         struct hso_serial *serial = dev2ser(hso_dev);
2630
2631         if (!serial)
2632                 return;
2633         set_serial_by_index(serial->minor, NULL);
2634
2635         hso_serial_common_free(serial);
2636
2637         if (serial->shared_int) {
2638                 mutex_lock(&serial->shared_int->shared_int_lock);
2639                 if (--serial->shared_int->ref_count == 0)
2640                         hso_free_shared_int(serial->shared_int);
2641                 else
2642                         mutex_unlock(&serial->shared_int->shared_int_lock);
2643         }
2644         hso_free_tiomget(serial);
2645         kfree(serial);
2646         kfree(hso_dev);
2647 }
2648
2649 /* Creates a bulk AT channel */
2650 static struct hso_device *hso_create_bulk_serial_device(
2651                         struct usb_interface *interface, int port)
2652 {
2653         struct hso_device *hso_dev;
2654         struct hso_serial *serial;
2655         int num_urbs;
2656         struct hso_tiocmget *tiocmget;
2657
2658         hso_dev = hso_create_device(interface, port);
2659         if (!hso_dev)
2660                 return NULL;
2661
2662         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2663         if (!serial)
2664                 goto exit;
2665
2666         serial->parent = hso_dev;
2667         hso_dev->port_data.dev_serial = serial;
2668
2669         if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2670                 num_urbs = 2;
2671                 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2672                                            GFP_KERNEL);
2673                 /* it isn't going to break our heart if serial->tiocmget
2674                  *  allocation fails don't bother checking this.
2675                  */
2676                 if (serial->tiocmget) {
2677                         tiocmget = serial->tiocmget;
2678                         tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2679                         if (tiocmget->urb) {
2680                                 mutex_init(&tiocmget->mutex);
2681                                 init_waitqueue_head(&tiocmget->waitq);
2682                                 tiocmget->endp = hso_get_ep(
2683                                         interface,
2684                                         USB_ENDPOINT_XFER_INT,
2685                                         USB_DIR_IN);
2686                         } else
2687                                 hso_free_tiomget(serial);
2688                 }
2689         }
2690         else
2691                 num_urbs = 1;
2692
2693         if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2694                                      BULK_URB_TX_SIZE))
2695                 goto exit;
2696
2697         serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2698                                      USB_DIR_IN);
2699         if (!serial->in_endp) {
2700                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2701                 goto exit2;
2702         }
2703
2704         if (!
2705             (serial->out_endp =
2706              hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2707                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2708                 goto exit2;
2709         }
2710
2711         serial->write_data = hso_std_serial_write_data;
2712
2713         /* and record this serial */
2714         set_serial_by_index(serial->minor, serial);
2715
2716         /* setup the proc dirs and files if needed */
2717         hso_log_port(hso_dev);
2718
2719         /* done, return it */
2720         return hso_dev;
2721
2722 exit2:
2723         hso_serial_common_free(serial);
2724 exit:
2725         hso_free_tiomget(serial);
2726         kfree(serial);
2727         kfree(hso_dev);
2728         return NULL;
2729 }
2730
2731 /* Creates a multiplexed AT channel */
2732 static
2733 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2734                                                 int port,
2735                                                 struct hso_shared_int *mux)
2736 {
2737         struct hso_device *hso_dev;
2738         struct hso_serial *serial;
2739         int port_spec;
2740
2741         port_spec = HSO_INTF_MUX;
2742         port_spec &= ~HSO_PORT_MASK;
2743
2744         port_spec |= hso_mux_to_port(port);
2745         if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2746                 return NULL;
2747
2748         hso_dev = hso_create_device(interface, port_spec);
2749         if (!hso_dev)
2750                 return NULL;
2751
2752         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2753         if (!serial)
2754                 goto exit;
2755
2756         hso_dev->port_data.dev_serial = serial;
2757         serial->parent = hso_dev;
2758
2759         if (hso_serial_common_create
2760             (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2761                 goto exit;
2762
2763         serial->tx_data_length--;
2764         serial->write_data = hso_mux_serial_write_data;
2765
2766         serial->shared_int = mux;
2767         mutex_lock(&serial->shared_int->shared_int_lock);
2768         serial->shared_int->ref_count++;
2769         mutex_unlock(&serial->shared_int->shared_int_lock);
2770
2771         /* and record this serial */
2772         set_serial_by_index(serial->minor, serial);
2773
2774         /* setup the proc dirs and files if needed */
2775         hso_log_port(hso_dev);
2776
2777         /* done, return it */
2778         return hso_dev;
2779
2780 exit:
2781         if (serial) {
2782                 tty_unregister_device(tty_drv, serial->minor);
2783                 kfree(serial);
2784         }
2785         if (hso_dev)
2786                 kfree(hso_dev);
2787         return NULL;
2788
2789 }
2790
2791 static void hso_free_shared_int(struct hso_shared_int *mux)
2792 {
2793         usb_free_urb(mux->shared_intr_urb);
2794         kfree(mux->shared_intr_buf);
2795         mutex_unlock(&mux->shared_int_lock);
2796         kfree(mux);
2797 }
2798
2799 static
2800 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2801 {
2802         struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2803
2804         if (!mux)
2805                 return NULL;
2806
2807         mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2808                                     USB_DIR_IN);
2809         if (!mux->intr_endp) {
2810                 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2811                 goto exit;
2812         }
2813
2814         mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2815         if (!mux->shared_intr_urb) {
2816                 dev_err(&interface->dev, "Could not allocate intr urb?");
2817                 goto exit;
2818         }
2819         mux->shared_intr_buf = kzalloc(mux->intr_endp->wMaxPacketSize,
2820                                        GFP_KERNEL);
2821         if (!mux->shared_intr_buf) {
2822                 dev_err(&interface->dev, "Could not allocate intr buf?");
2823                 goto exit;
2824         }
2825
2826         mutex_init(&mux->shared_int_lock);
2827
2828         return mux;
2829
2830 exit:
2831         kfree(mux->shared_intr_buf);
2832         usb_free_urb(mux->shared_intr_urb);
2833         kfree(mux);
2834         return NULL;
2835 }
2836
2837 /* Gets the port spec for a certain interface */
2838 static int hso_get_config_data(struct usb_interface *interface)
2839 {
2840         struct usb_device *usbdev = interface_to_usbdev(interface);
2841         u8 config_data[17];
2842         u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2843         s32 result;
2844
2845         if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2846                             0x86, 0xC0, 0, 0, config_data, 17,
2847                             USB_CTRL_SET_TIMEOUT) != 0x11) {
2848                 return -EIO;
2849         }
2850
2851         switch (config_data[if_num]) {
2852         case 0x0:
2853                 result = 0;
2854                 break;
2855         case 0x1:
2856                 result = HSO_PORT_DIAG;
2857                 break;
2858         case 0x2:
2859                 result = HSO_PORT_GPS;
2860                 break;
2861         case 0x3:
2862                 result = HSO_PORT_GPS_CONTROL;
2863                 break;
2864         case 0x4:
2865                 result = HSO_PORT_APP;
2866                 break;
2867         case 0x5:
2868                 result = HSO_PORT_APP2;
2869                 break;
2870         case 0x6:
2871                 result = HSO_PORT_CONTROL;
2872                 break;
2873         case 0x7:
2874                 result = HSO_PORT_NETWORK;
2875                 break;
2876         case 0x8:
2877                 result = HSO_PORT_MODEM;
2878                 break;
2879         case 0x9:
2880                 result = HSO_PORT_MSD;
2881                 break;
2882         case 0xa:
2883                 result = HSO_PORT_PCSC;
2884                 break;
2885         case 0xb:
2886                 result = HSO_PORT_VOICE;
2887                 break;
2888         default:
2889                 result = 0;
2890         }
2891
2892         if (result)
2893                 result |= HSO_INTF_BULK;
2894
2895         if (config_data[16] & 0x1)
2896                 result |= HSO_INFO_CRC_BUG;
2897
2898         return result;
2899 }
2900
2901 /* called once for each interface upon device insertion */
2902 static int hso_probe(struct usb_interface *interface,
2903                      const struct usb_device_id *id)
2904 {
2905         int mux, i, if_num, port_spec;
2906         unsigned char port_mask;
2907         struct hso_device *hso_dev = NULL;
2908         struct hso_shared_int *shared_int;
2909         struct hso_device *tmp_dev = NULL;
2910
2911         if_num = interface->altsetting->desc.bInterfaceNumber;
2912
2913         /* Get the interface/port specification from either driver_info or from
2914          * the device itself */
2915         if (id->driver_info)
2916                 port_spec = ((u32 *)(id->driver_info))[if_num];
2917         else
2918                 port_spec = hso_get_config_data(interface);
2919
2920         if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2921                 dev_err(&interface->dev, "Not our interface\n");
2922                 return -ENODEV;
2923         }
2924         /* Check if we need to switch to alt interfaces prior to port
2925          * configuration */
2926         if (interface->num_altsetting > 1)
2927                 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2928         interface->needs_remote_wakeup = 1;
2929
2930         /* Allocate new hso device(s) */
2931         switch (port_spec & HSO_INTF_MASK) {
2932         case HSO_INTF_MUX:
2933                 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2934                         /* Create the network device */
2935                         if (!disable_net) {
2936                                 hso_dev = hso_create_net_device(interface);
2937                                 if (!hso_dev)
2938                                         goto exit;
2939                                 tmp_dev = hso_dev;
2940                         }
2941                 }
2942
2943                 if (hso_get_mux_ports(interface, &port_mask))
2944                         /* TODO: de-allocate everything */
2945                         goto exit;
2946
2947                 shared_int = hso_create_shared_int(interface);
2948                 if (!shared_int)
2949                         goto exit;
2950
2951                 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2952                         if (port_mask & i) {
2953                                 hso_dev = hso_create_mux_serial_device(
2954                                                 interface, i, shared_int);
2955                                 if (!hso_dev)
2956                                         goto exit;
2957                         }
2958                 }
2959
2960                 if (tmp_dev)
2961                         hso_dev = tmp_dev;
2962                 break;
2963
2964         case HSO_INTF_BULK:
2965                 /* It's a regular bulk interface */
2966                 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK)
2967                     && !disable_net)
2968                         hso_dev = hso_create_net_device(interface);
2969                 else
2970                         hso_dev =
2971                             hso_create_bulk_serial_device(interface, port_spec);
2972                 if (!hso_dev)
2973                         goto exit;
2974                 break;
2975         default:
2976                 goto exit;
2977         }
2978
2979         /* save our data pointer in this device */
2980         usb_set_intfdata(interface, hso_dev);
2981
2982         /* done */
2983         return 0;
2984 exit:
2985         hso_free_interface(interface);
2986         return -ENODEV;
2987 }
2988
2989 /* device removed, cleaning up */
2990 static void hso_disconnect(struct usb_interface *interface)
2991 {
2992         hso_free_interface(interface);
2993
2994         /* remove reference of our private data */
2995         usb_set_intfdata(interface, NULL);
2996 }
2997
2998 static void async_get_intf(struct work_struct *data)
2999 {
3000         struct hso_device *hso_dev =
3001             container_of(data, struct hso_device, async_get_intf);
3002         usb_autopm_get_interface(hso_dev->interface);
3003 }
3004
3005 static void async_put_intf(struct work_struct *data)
3006 {
3007         struct hso_device *hso_dev =
3008             container_of(data, struct hso_device, async_put_intf);
3009         usb_autopm_put_interface(hso_dev->interface);
3010 }
3011
3012 static int hso_get_activity(struct hso_device *hso_dev)
3013 {
3014         if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3015                 if (!hso_dev->is_active) {
3016                         hso_dev->is_active = 1;
3017                         schedule_work(&hso_dev->async_get_intf);
3018                 }
3019         }
3020
3021         if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3022                 return -EAGAIN;
3023
3024         usb_mark_last_busy(hso_dev->usb);
3025
3026         return 0;
3027 }
3028
3029 static int hso_put_activity(struct hso_device *hso_dev)
3030 {
3031         if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3032                 if (hso_dev->is_active) {
3033                         hso_dev->is_active = 0;
3034                         schedule_work(&hso_dev->async_put_intf);
3035                         return -EAGAIN;
3036                 }
3037         }
3038         hso_dev->is_active = 0;
3039         return 0;
3040 }
3041
3042 /* called by kernel when we need to suspend device */
3043 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3044 {
3045         int i, result;
3046
3047         /* Stop all serial ports */
3048         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3049                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3050                         result = hso_stop_serial_device(serial_table[i]);
3051                         if (result)
3052                                 goto out;
3053                 }
3054         }
3055
3056         /* Stop all network ports */
3057         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3058                 if (network_table[i] &&
3059                     (network_table[i]->interface == iface)) {
3060                         result = hso_stop_net_device(network_table[i]);
3061                         if (result)
3062                                 goto out;
3063                 }
3064         }
3065
3066 out:
3067         return 0;
3068 }
3069
3070 /* called by kernel when we need to resume device */
3071 static int hso_resume(struct usb_interface *iface)
3072 {
3073         int i, result = 0;
3074         struct hso_net *hso_net;
3075
3076         /* Start all serial ports */
3077         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3078                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3079                         if (dev2ser(serial_table[i])->open_count) {
3080                                 result =
3081                                     hso_start_serial_device(serial_table[i], GFP_NOIO);
3082                                 hso_kick_transmit(dev2ser(serial_table[i]));
3083                                 if (result)
3084                                         goto out;
3085                         }
3086                 }
3087         }
3088
3089         /* Start all network ports */
3090         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3091                 if (network_table[i] &&
3092                     (network_table[i]->interface == iface)) {
3093                         hso_net = dev2net(network_table[i]);
3094                         if (hso_net->flags & IFF_UP) {
3095                                 /* First transmit any lingering data,
3096                                    then restart the device. */
3097                                 if (hso_net->skb_tx_buf) {
3098                                         dev_dbg(&iface->dev,
3099                                                 "Transmitting"
3100                                                 " lingering data\n");
3101                                         hso_net_start_xmit(hso_net->skb_tx_buf,
3102                                                            hso_net->net);
3103                                         hso_net->skb_tx_buf = NULL;
3104                                 }
3105                                 result = hso_start_net_device(network_table[i]);
3106                                 if (result)
3107                                         goto out;
3108                         }
3109                 }
3110         }
3111
3112 out:
3113         return result;
3114 }
3115
3116 static void hso_serial_ref_free(struct kref *ref)
3117 {
3118         struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3119
3120         hso_free_serial_device(hso_dev);
3121 }
3122
3123 static void hso_free_interface(struct usb_interface *interface)
3124 {
3125         struct hso_serial *hso_dev;
3126         struct tty_struct *tty;
3127         int i;
3128
3129         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3130                 if (serial_table[i]
3131                     && (serial_table[i]->interface == interface)) {
3132                         hso_dev = dev2ser(serial_table[i]);
3133                         spin_lock_irq(&hso_dev->serial_lock);
3134                         tty = tty_kref_get(hso_dev->tty);
3135                         spin_unlock_irq(&hso_dev->serial_lock);
3136                         if (tty)
3137                                 tty_hangup(tty);
3138                         mutex_lock(&hso_dev->parent->mutex);
3139                         tty_kref_put(tty);
3140                         hso_dev->parent->usb_gone = 1;
3141                         mutex_unlock(&hso_dev->parent->mutex);
3142                         kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3143                 }
3144         }
3145
3146         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3147                 if (network_table[i]
3148                     && (network_table[i]->interface == interface)) {
3149                         struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3150                         /* hso_stop_net_device doesn't stop the net queue since
3151                          * traffic needs to start it again when suspended */
3152                         netif_stop_queue(dev2net(network_table[i])->net);
3153                         hso_stop_net_device(network_table[i]);
3154                         cancel_work_sync(&network_table[i]->async_put_intf);
3155                         cancel_work_sync(&network_table[i]->async_get_intf);
3156                         if (rfk)
3157                                 rfkill_unregister(rfk);
3158                         hso_free_net_device(network_table[i]);
3159                 }
3160         }
3161 }
3162
3163 /* Helper functions */
3164
3165 /* Get the endpoint ! */
3166 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3167                                                   int type, int dir)
3168 {
3169         int i;
3170         struct usb_host_interface *iface = intf->cur_altsetting;
3171         struct usb_endpoint_descriptor *endp;
3172
3173         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3174                 endp = &iface->endpoint[i].desc;
3175                 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3176                     (usb_endpoint_type(endp) == type))
3177                         return endp;
3178         }
3179
3180         return NULL;
3181 }
3182
3183 /* Get the byte that describes which ports are enabled */
3184 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3185 {
3186         int i;
3187         struct usb_host_interface *iface = intf->cur_altsetting;
3188
3189         if (iface->extralen == 3) {
3190                 *ports = iface->extra[2];
3191                 return 0;
3192         }
3193
3194         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3195                 if (iface->endpoint[i].extralen == 3) {
3196                         *ports = iface->endpoint[i].extra[2];
3197                         return 0;
3198                 }
3199         }
3200
3201         return -1;
3202 }
3203
3204 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3205 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3206                                    struct usb_device *usb, gfp_t gfp)
3207 {
3208         int result;
3209
3210         usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3211                          usb_rcvintpipe(usb,
3212                                 shared_int->intr_endp->bEndpointAddress & 0x7F),
3213                          shared_int->shared_intr_buf,
3214                          shared_int->intr_endp->wMaxPacketSize,
3215                          intr_callback, shared_int,
3216                          shared_int->intr_endp->bInterval);
3217
3218         result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3219         if (result)
3220                 dev_warn(&usb->dev, "%s failed mux_intr_urb %d", __func__,
3221                         result);
3222
3223         return result;
3224 }
3225
3226 /* operations setup of the serial interface */
3227 static const struct tty_operations hso_serial_ops = {
3228         .open = hso_serial_open,
3229         .close = hso_serial_close,
3230         .write = hso_serial_write,
3231         .write_room = hso_serial_write_room,
3232         .ioctl = hso_serial_ioctl,
3233         .set_termios = hso_serial_set_termios,
3234         .chars_in_buffer = hso_serial_chars_in_buffer,
3235         .tiocmget = hso_serial_tiocmget,
3236         .tiocmset = hso_serial_tiocmset,
3237         .unthrottle = hso_unthrottle
3238 };
3239
3240 static struct usb_driver hso_driver = {
3241         .name = driver_name,
3242         .probe = hso_probe,
3243         .disconnect = hso_disconnect,
3244         .id_table = hso_ids,
3245         .suspend = hso_suspend,
3246         .resume = hso_resume,
3247         .reset_resume = hso_resume,
3248         .supports_autosuspend = 1,
3249 };
3250
3251 static int __init hso_init(void)
3252 {
3253         int i;
3254         int result;
3255
3256         /* put it in the log */
3257         printk(KERN_INFO "hso: %s\n", version);
3258
3259         /* Initialise the serial table semaphore and table */
3260         spin_lock_init(&serial_table_lock);
3261         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3262                 serial_table[i] = NULL;
3263
3264         /* allocate our driver using the proper amount of supported minors */
3265         tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3266         if (!tty_drv)
3267                 return -ENOMEM;
3268
3269         /* fill in all needed values */
3270         tty_drv->magic = TTY_DRIVER_MAGIC;
3271         tty_drv->owner = THIS_MODULE;
3272         tty_drv->driver_name = driver_name;
3273         tty_drv->name = tty_filename;
3274
3275         /* if major number is provided as parameter, use that one */
3276         if (tty_major)
3277                 tty_drv->major = tty_major;
3278
3279         tty_drv->minor_start = 0;
3280         tty_drv->num = HSO_SERIAL_TTY_MINORS;
3281         tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3282         tty_drv->subtype = SERIAL_TYPE_NORMAL;
3283         tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3284         tty_drv->init_termios = tty_std_termios;
3285         hso_init_termios(&tty_drv->init_termios);
3286         tty_set_operations(tty_drv, &hso_serial_ops);
3287
3288         /* register the tty driver */
3289         result = tty_register_driver(tty_drv);
3290         if (result) {
3291                 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3292                         __func__, result);
3293                 return result;
3294         }
3295
3296         /* register this module as an usb driver */
3297         result = usb_register(&hso_driver);
3298         if (result) {
3299                 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3300                         result);
3301                 /* cleanup serial interface */
3302                 tty_unregister_driver(tty_drv);
3303                 return result;
3304         }
3305
3306         /* done */
3307         return 0;
3308 }
3309
3310 static void __exit hso_exit(void)
3311 {
3312         printk(KERN_INFO "hso: unloaded\n");
3313
3314         tty_unregister_driver(tty_drv);
3315         /* deregister the usb driver */
3316         usb_deregister(&hso_driver);
3317 }
3318
3319 /* Module definitions */
3320 module_init(hso_init);
3321 module_exit(hso_exit);
3322
3323 MODULE_AUTHOR(MOD_AUTHOR);
3324 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3325 MODULE_LICENSE(MOD_LICENSE);
3326 MODULE_INFO(Version, DRIVER_VERSION);
3327
3328 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3329 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3330 module_param(debug, int, S_IRUGO | S_IWUSR);
3331
3332 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3333 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3334 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3335
3336 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3337 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3338 module_param(disable_net, int, S_IRUGO | S_IWUSR);