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  *  Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
   7  *                      <ajb@spheresystems.co.uk>
   8  *  Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
   9  *  Copyright (C) 2008 Novell, Inc.
  10  *
  11  *  This program is free software; you can redistribute it and/or modify
  12  *  it under the terms of the GNU General Public License version 2 as
  13  *  published by the Free Software Foundation.
  14  *
  15  *  This program is distributed in the hope that it will be useful,
  16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *  GNU General Public License for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License
  21  *  along with this program; if not, write to the Free Software
  22  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  23  *  USA
  24  *
  25  *
  26  *****************************************************************************/
  27
  28 /******************************************************************************
  29  *
  30  * Description of the device:
  31  *
  32  * Interface 0: Contains the IP network interface on the bulk end points.
  33  *              The multiplexed serial ports are using the interrupt and
  34  *              control endpoints.
  35  *              Interrupt contains a bitmap telling which multiplexed
  36  *              serialport needs servicing.
  37  *
  38  * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
  39  *              port is opened, as this have a huge impact on the network port
  40  *              throughput.
  41  *
  42  * Interface 2: Standard modem interface - circuit switched interface, should
  43  *              not be used.
  44  *
  45  *****************************************************************************/
  46
  47 #include <linux/sched.h>
  48 #include <linux/slab.h>
  49 #include <linux/init.h>
  50 #include <linux/delay.h>
  51 #include <linux/netdevice.h>
  52 #include <linux/module.h>
  53 #include <linux/ethtool.h>
  54 #include <linux/usb.h>
  55 #include <linux/timer.h>
  56 #include <linux/tty.h>
  57 #include <linux/tty_driver.h>
  58 #include <linux/tty_flip.h>
  59 #include <linux/kmod.h>
  60 #include <linux/rfkill.h>
  61 #include <linux/ip.h>
  62 #include <linux/uaccess.h>
  63 #include <linux/usb/cdc.h>
  64 #include <net/arp.h>
  65 #include <asm/byteorder.h>
  66
  67
  68 #define DRIVER_VERSION                  "1.2"
  69 #define MOD_AUTHOR                      "Option Wireless"
  70 #define MOD_DESCRIPTION                 "USB High Speed Option driver"
  71 #define MOD_LICENSE                     "GPL"
  72
  73 #define HSO_MAX_NET_DEVICES             10
  74 #define HSO__MAX_MTU                    2048
  75 #define DEFAULT_MTU                     1500
  76 #define DEFAULT_MRU                     1500
  77
  78 #define CTRL_URB_RX_SIZE                1024
  79 #define CTRL_URB_TX_SIZE                64
  80
  81 #define BULK_URB_RX_SIZE                4096
  82 #define BULK_URB_TX_SIZE                8192
  83
  84 #define MUX_BULK_RX_BUF_SIZE            HSO__MAX_MTU
  85 #define MUX_BULK_TX_BUF_SIZE            HSO__MAX_MTU
  86 #define MUX_BULK_RX_BUF_COUNT           4
  87 #define USB_TYPE_OPTION_VENDOR          0x20
  88
  89 /* These definitions are used with the struct hso_net flags element */
  90 /* - use *_bit operations on it. (bit indices not values.) */
  91 #define HSO_NET_RUNNING                 0
  92
  93 #define HSO_NET_TX_TIMEOUT              (HZ*10)
  94
  95 /* Serial port defines and structs. */
  96 #define HSO_SERIAL_FLAG_RX_SENT         0
  97
  98 #define HSO_SERIAL_MAGIC                0x48534f31
  99
 100 /* Number of ttys to handle */
 101 #define HSO_SERIAL_TTY_MINORS           256
 102
 103 #define MAX_RX_URBS                     2
 104
 105 static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty)
 106 {
 107         if (tty)
 108                 return tty->driver_data;
 109         return NULL;
 110 }
 111
 112 /*****************************************************************************/
 113 /* Debugging functions                                                       */
 114 /*****************************************************************************/
 115 #define D__(lvl_, fmt, arg...)                          \
 116         do {                                            \
 117                 printk(lvl_ "[%d:%s]: " fmt "\n",       \
 118                        __LINE__, __func__, ## arg);     \
 119         } while (0)
 120
 121 #define D_(lvl, args...)                                \
 122         do {                                            \
 123                 if (lvl & debug)                        \
 124                         D__(KERN_INFO, args);           \
 125         } while (0)
 126
 127 #define D1(args...)     D_(0x01, ##args)
 128 #define D2(args...)     D_(0x02, ##args)
 129 #define D3(args...)     D_(0x04, ##args)
 130 #define D4(args...)     D_(0x08, ##args)
 131 #define D5(args...)     D_(0x10, ##args)
 132
 133 /*****************************************************************************/
 134 /* Enumerators                                                               */
 135 /*****************************************************************************/
 136 enum pkt_parse_state {
 137         WAIT_IP,
 138         WAIT_DATA,
 139         WAIT_SYNC
 140 };
 141
 142 /*****************************************************************************/
 143 /* Structs                                                                   */
 144 /*****************************************************************************/
 145
 146 struct hso_shared_int {
 147         struct usb_endpoint_descriptor *intr_endp;
 148         void *shared_intr_buf;
 149         struct urb *shared_intr_urb;
 150         struct usb_device *usb;
 151         int use_count;
 152         int ref_count;
 153         struct mutex shared_int_lock;
 154 };
 155
 156 struct hso_net {
 157         struct hso_device *parent;
 158         struct net_device *net;
 159         struct rfkill *rfkill;
 160
 161         struct usb_endpoint_descriptor *in_endp;
 162         struct usb_endpoint_descriptor *out_endp;
 163
 164         struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
 165         struct urb *mux_bulk_tx_urb;
 166         void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
 167         void *mux_bulk_tx_buf;
 168
 169         struct sk_buff *skb_rx_buf;
 170         struct sk_buff *skb_tx_buf;
 171
 172         enum pkt_parse_state rx_parse_state;
 173         spinlock_t net_lock;
 174
 175         unsigned short rx_buf_size;
 176         unsigned short rx_buf_missing;
 177         struct iphdr rx_ip_hdr;
 178
 179         unsigned long flags;
 180 };
 181
 182 struct hso_serial {
 183         struct hso_device *parent;
 184         int magic;
 185         u8 minor;
 186
 187         struct hso_shared_int *shared_int;
 188
 189         /* rx/tx urb could be either a bulk urb or a control urb depending
 190            on which serial port it is used on. */
 191         struct urb *rx_urb[MAX_RX_URBS];
 192         u8 num_rx_urbs;
 193         u8 *rx_data[MAX_RX_URBS];
 194         u16 rx_data_length;     /* should contain allocated length */
 195
 196         struct urb *tx_urb;
 197         u8 *tx_data;
 198         u8 *tx_buffer;
 199         u16 tx_data_length;     /* should contain allocated length */
 200         u16 tx_data_count;
 201         u16 tx_buffer_count;
 202         struct usb_ctrlrequest ctrl_req_tx;
 203         struct usb_ctrlrequest ctrl_req_rx;
 204
 205         struct usb_endpoint_descriptor *in_endp;
 206         struct usb_endpoint_descriptor *out_endp;
 207
 208         unsigned long flags;
 209         u8 rts_state;
 210         u8 dtr_state;
 211         unsigned tx_urb_used:1;
 212
 213         /* from usb_serial_port */
 214         struct tty_struct *tty;
 215         int open_count;
 216         spinlock_t serial_lock;
 217
 218         int (*write_data) (struct hso_serial *serial);
 219 };
 220
 221 struct hso_device {
 222         union {
 223                 struct hso_serial *dev_serial;
 224                 struct hso_net *dev_net;
 225         } port_data;
 226
 227         u32 port_spec;
 228
 229         u8 is_active;
 230         u8 usb_gone;
 231         struct work_struct async_get_intf;
 232         struct work_struct async_put_intf;
 233
 234         struct usb_device *usb;
 235         struct usb_interface *interface;
 236
 237         struct device *dev;
 238         struct kref ref;
 239         struct mutex mutex;
 240 };
 241
 242 /* Type of interface */
 243 #define HSO_INTF_MASK           0xFF00
 244 #define HSO_INTF_MUX            0x0100
 245 #define HSO_INTF_BULK           0x0200
 246
 247 /* Type of port */
 248 #define HSO_PORT_MASK           0xFF
 249 #define HSO_PORT_NO_PORT        0x0
 250 #define HSO_PORT_CONTROL        0x1
 251 #define HSO_PORT_APP            0x2
 252 #define HSO_PORT_GPS            0x3
 253 #define HSO_PORT_PCSC           0x4
 254 #define HSO_PORT_APP2           0x5
 255 #define HSO_PORT_GPS_CONTROL    0x6
 256 #define HSO_PORT_MSD            0x7
 257 #define HSO_PORT_VOICE          0x8
 258 #define HSO_PORT_DIAG2          0x9
 259 #define HSO_PORT_DIAG           0x10
 260 #define HSO_PORT_MODEM          0x11
 261 #define HSO_PORT_NETWORK        0x12
 262
 263 /* Additional device info */
 264 #define HSO_INFO_MASK           0xFF000000
 265 #define HSO_INFO_CRC_BUG        0x01000000
 266
 267 /*****************************************************************************/
 268 /* Prototypes                                                                */
 269 /*****************************************************************************/
 270 /* Serial driver functions */
 271 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
 272                                unsigned int set, unsigned int clear);
 273 static void ctrl_callback(struct urb *urb);
 274 static void put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
 275 static void hso_kick_transmit(struct hso_serial *serial);
 276 /* Helper functions */
 277 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
 278                                    struct usb_device *usb, gfp_t gfp);
 279 static void log_usb_status(int status, const char *function);
 280 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
 281                                                   int type, int dir);
 282 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
 283 static void hso_free_interface(struct usb_interface *intf);
 284 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
 285 static int hso_stop_serial_device(struct hso_device *hso_dev);
 286 static int hso_start_net_device(struct hso_device *hso_dev);
 287 static void hso_free_shared_int(struct hso_shared_int *shared_int);
 288 static int hso_stop_net_device(struct hso_device *hso_dev);
 289 static void hso_serial_ref_free(struct kref *ref);
 290 static void async_get_intf(struct work_struct *data);
 291 static void async_put_intf(struct work_struct *data);
 292 static int hso_put_activity(struct hso_device *hso_dev);
 293 static int hso_get_activity(struct hso_device *hso_dev);
 294
 295 /*****************************************************************************/
 296 /* Helping functions                                                         */
 297 /*****************************************************************************/
 298
 299 /* #define DEBUG */
 300
 301 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
 302 {
 303         return hso_dev->port_data.dev_net;
 304 }
 305
 306 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
 307 {
 308         return hso_dev->port_data.dev_serial;
 309 }
 310
 311 /* Debugging functions */
 312 #ifdef DEBUG
 313 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
 314                      unsigned int len)
 315 {
 316         static char name[255];
 317
 318         sprintf(name, "hso[%d:%s]", line_count, func_name);
 319         print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
 320 }
 321
 322 #define DUMP(buf_, len_)        \
 323         dbg_dump(__LINE__, __func__, buf_, len_)
 324
 325 #define DUMP1(buf_, len_)                       \
 326         do {                                    \
 327                 if (0x01 & debug)               \
 328                         DUMP(buf_, len_);       \
 329         } while (0)
 330 #else
 331 #define DUMP(buf_, len_)
 332 #define DUMP1(buf_, len_)
 333 #endif
 334
 335 /* module parameters */
 336 static int debug;
 337 static int tty_major;
 338 static int disable_net;
 339
 340 /* driver info */
 341 static const char driver_name[] = "hso";
 342 static const char tty_filename[] = "ttyHS";
 343 static const char *version = __FILE__ ": " DRIVER_VERSION " " MOD_AUTHOR;
 344 /* the usb driver itself (registered in hso_init) */
 345 static struct usb_driver hso_driver;
 346 /* serial structures */
 347 static struct tty_driver *tty_drv;
 348 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
 349 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
 350 static spinlock_t serial_table_lock;
 351 static struct ktermios *hso_serial_termios[HSO_SERIAL_TTY_MINORS];
 352 static struct ktermios *hso_serial_termios_locked[HSO_SERIAL_TTY_MINORS];
 353
 354 static const s32 default_port_spec[] = {
 355         HSO_INTF_MUX | HSO_PORT_NETWORK,
 356         HSO_INTF_BULK | HSO_PORT_DIAG,
 357         HSO_INTF_BULK | HSO_PORT_MODEM,
 358         0
 359 };
 360
 361 static const s32 icon321_port_spec[] = {
 362         HSO_INTF_MUX | HSO_PORT_NETWORK,
 363         HSO_INTF_BULK | HSO_PORT_DIAG2,
 364         HSO_INTF_BULK | HSO_PORT_MODEM,
 365         HSO_INTF_BULK | HSO_PORT_DIAG,
 366         0
 367 };
 368
 369 #define default_port_device(vendor, product)    \
 370         USB_DEVICE(vendor, product),    \
 371                 .driver_info = (kernel_ulong_t)default_port_spec
 372
 373 #define icon321_port_device(vendor, product)    \
 374         USB_DEVICE(vendor, product),    \
 375                 .driver_info = (kernel_ulong_t)icon321_port_spec
 376
 377 /* list of devices we support */
 378 static const struct usb_device_id hso_ids[] = {
 379         {default_port_device(0x0af0, 0x6711)},
 380         {default_port_device(0x0af0, 0x6731)},
 381         {default_port_device(0x0af0, 0x6751)},
 382         {default_port_device(0x0af0, 0x6771)},
 383         {default_port_device(0x0af0, 0x6791)},
 384         {default_port_device(0x0af0, 0x6811)},
 385         {default_port_device(0x0af0, 0x6911)},
 386         {default_port_device(0x0af0, 0x6951)},
 387         {default_port_device(0x0af0, 0x6971)},
 388         {default_port_device(0x0af0, 0x7011)},
 389         {default_port_device(0x0af0, 0x7031)},
 390         {default_port_device(0x0af0, 0x7051)},
 391         {default_port_device(0x0af0, 0x7071)},
 392         {default_port_device(0x0af0, 0x7111)},
 393         {default_port_device(0x0af0, 0x7211)},
 394         {default_port_device(0x0af0, 0x7251)},
 395         {default_port_device(0x0af0, 0x7271)},
 396         {default_port_device(0x0af0, 0x7311)},
 397         {default_port_device(0x0af0, 0xc031)},  /* Icon-Edge */
 398         {icon321_port_device(0x0af0, 0xd013)},  /* Module HSxPA */
 399         {icon321_port_device(0x0af0, 0xd031)},  /* Icon-321 */
 400         {icon321_port_device(0x0af0, 0xd033)},  /* Icon-322 */
 401         {USB_DEVICE(0x0af0, 0x7301)},           /* GE40x */
 402         {USB_DEVICE(0x0af0, 0x7361)},           /* GE40x */
 403         {USB_DEVICE(0x0af0, 0x7401)},           /* GI 0401 */
 404         {USB_DEVICE(0x0af0, 0x7501)},           /* GTM 382 */
 405         {USB_DEVICE(0x0af0, 0x7601)},           /* GE40x */
 406         {}
 407 };
 408 MODULE_DEVICE_TABLE(usb, hso_ids);
 409
 410 /* Sysfs attribute */
 411 static ssize_t hso_sysfs_show_porttype(struct device *dev,
 412                                        struct device_attribute *attr,
 413                                        char *buf)
 414 {
 415         struct hso_device *hso_dev = dev->driver_data;
 416         char *port_name;
 417
 418         if (!hso_dev)
 419                 return 0;
 420
 421         switch (hso_dev->port_spec & HSO_PORT_MASK) {
 422         case HSO_PORT_CONTROL:
 423                 port_name = "Control";
 424                 break;
 425         case HSO_PORT_APP:
 426                 port_name = "Application";
 427                 break;
 428         case HSO_PORT_APP2:
 429                 port_name = "Application2";
 430                 break;
 431         case HSO_PORT_GPS:
 432                 port_name = "GPS";
 433                 break;
 434         case HSO_PORT_GPS_CONTROL:
 435                 port_name = "GPS Control";
 436                 break;
 437         case HSO_PORT_PCSC:
 438                 port_name = "PCSC";
 439                 break;
 440         case HSO_PORT_DIAG:
 441                 port_name = "Diagnostic";
 442                 break;
 443         case HSO_PORT_DIAG2:
 444                 port_name = "Diagnostic2";
 445                 break;
 446         case HSO_PORT_MODEM:
 447                 port_name = "Modem";
 448                 break;
 449         case HSO_PORT_NETWORK:
 450                 port_name = "Network";
 451                 break;
 452         default:
 453                 port_name = "Unknown";
 454                 break;
 455         }
 456
 457         return sprintf(buf, "%s\n", port_name);
 458 }
 459 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
 460
 461 /* converts mux value to a port spec value */
 462 static u32 hso_mux_to_port(int mux)
 463 {
 464         u32 result;
 465
 466         switch (mux) {
 467         case 0x1:
 468                 result = HSO_PORT_CONTROL;
 469                 break;
 470         case 0x2:
 471                 result = HSO_PORT_APP;
 472                 break;
 473         case 0x4:
 474                 result = HSO_PORT_PCSC;
 475                 break;
 476         case 0x8:
 477                 result = HSO_PORT_GPS;
 478                 break;
 479         case 0x10:
 480                 result = HSO_PORT_APP2;
 481                 break;
 482         default:
 483                 result = HSO_PORT_NO_PORT;
 484         }
 485         return result;
 486 }
 487
 488 /* converts port spec value to a mux value */
 489 static u32 hso_port_to_mux(int port)
 490 {
 491         u32 result;
 492
 493         switch (port & HSO_PORT_MASK) {
 494         case HSO_PORT_CONTROL:
 495                 result = 0x0;
 496                 break;
 497         case HSO_PORT_APP:
 498                 result = 0x1;
 499                 break;
 500         case HSO_PORT_PCSC:
 501                 result = 0x2;
 502                 break;
 503         case HSO_PORT_GPS:
 504                 result = 0x3;
 505                 break;
 506         case HSO_PORT_APP2:
 507                 result = 0x4;
 508                 break;
 509         default:
 510                 result = 0x0;
 511         }
 512         return result;
 513 }
 514
 515 static struct hso_serial *get_serial_by_shared_int_and_type(
 516                                         struct hso_shared_int *shared_int,
 517                                         int mux)
 518 {
 519         int i, port;
 520
 521         port = hso_mux_to_port(mux);
 522
 523         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
 524                 if (serial_table[i]
 525                     && (dev2ser(serial_table[i])->shared_int == shared_int)
 526                     && ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
 527                         return dev2ser(serial_table[i]);
 528                 }
 529         }
 530
 531         return NULL;
 532 }
 533
 534 static struct hso_serial *get_serial_by_index(unsigned index)
 535 {
 536         struct hso_serial *serial = NULL;
 537         unsigned long flags;
 538
 539         spin_lock_irqsave(&serial_table_lock, flags);
 540         if (serial_table[index])
 541                 serial = dev2ser(serial_table[index]);
 542         spin_unlock_irqrestore(&serial_table_lock, flags);
 543
 544         return serial;
 545 }
 546
 547 static int get_free_serial_index(void)
 548 {
 549         int index;
 550         unsigned long flags;
 551
 552         spin_lock_irqsave(&serial_table_lock, flags);
 553         for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
 554                 if (serial_table[index] == NULL) {
 555                         spin_unlock_irqrestore(&serial_table_lock, flags);
 556                         return index;
 557                 }
 558         }
 559         spin_unlock_irqrestore(&serial_table_lock, flags);
 560
 561         printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
 562         return -1;
 563 }
 564
 565 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
 566 {
 567         unsigned long flags;
 568
 569         spin_lock_irqsave(&serial_table_lock, flags);
 570         if (serial)
 571                 serial_table[index] = serial->parent;
 572         else
 573                 serial_table[index] = NULL;
 574         spin_unlock_irqrestore(&serial_table_lock, flags);
 575 }
 576
 577 /* log a meaningful explanation of an USB status */
 578 static void log_usb_status(int status, const char *function)
 579 {
 580         char *explanation;
 581
 582         switch (status) {
 583         case -ENODEV:
 584                 explanation = "no device";
 585                 break;
 586         case -ENOENT:
 587                 explanation = "endpoint not enabled";
 588                 break;
 589         case -EPIPE:
 590                 explanation = "endpoint stalled";
 591                 break;
 592         case -ENOSPC:
 593                 explanation = "not enough bandwidth";
 594                 break;
 595         case -ESHUTDOWN:
 596                 explanation = "device disabled";
 597                 break;
 598         case -EHOSTUNREACH:
 599                 explanation = "device suspended";
 600                 break;
 601         case -EINVAL:
 602         case -EAGAIN:
 603         case -EFBIG:
 604         case -EMSGSIZE:
 605                 explanation = "internal error";
 606                 break;
 607         default:
 608                 explanation = "unknown status";
 609                 break;
 610         }
 611         D1("%s: received USB status - %s (%d)", function, explanation, status);
 612 }
 613
 614 /* Network interface functions */
 615
 616 /* called when net interface is brought up by ifconfig */
 617 static int hso_net_open(struct net_device *net)
 618 {
 619         struct hso_net *odev = netdev_priv(net);
 620         unsigned long flags = 0;
 621
 622         if (!odev) {
 623                 dev_err(&net->dev, "No net device !\n");
 624                 return -ENODEV;
 625         }
 626
 627         odev->skb_tx_buf = NULL;
 628
 629         /* setup environment */
 630         spin_lock_irqsave(&odev->net_lock, flags);
 631         odev->rx_parse_state = WAIT_IP;
 632         odev->rx_buf_size = 0;
 633         odev->rx_buf_missing = sizeof(struct iphdr);
 634         spin_unlock_irqrestore(&odev->net_lock, flags);
 635
 636         hso_start_net_device(odev->parent);
 637
 638         /* We are up and running. */
 639         set_bit(HSO_NET_RUNNING, &odev->flags);
 640
 641         /* Tell the kernel we are ready to start receiving from it */
 642         netif_start_queue(net);
 643
 644         return 0;
 645 }
 646
 647 /* called when interface is brought down by ifconfig */
 648 static int hso_net_close(struct net_device *net)
 649 {
 650         struct hso_net *odev = netdev_priv(net);
 651
 652         /* we don't need the queue anymore */
 653         netif_stop_queue(net);
 654         /* no longer running */
 655         clear_bit(HSO_NET_RUNNING, &odev->flags);
 656
 657         hso_stop_net_device(odev->parent);
 658
 659         /* done */
 660         return 0;
 661 }
 662
 663 /* USB tells is xmit done, we should start the netqueue again */
 664 static void write_bulk_callback(struct urb *urb)
 665 {
 666         struct hso_net *odev = urb->context;
 667         int status = urb->status;
 668
 669         /* Sanity check */
 670         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
 671                 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
 672                 return;
 673         }
 674
 675         /* Do we still have a valid kernel network device? */
 676         if (!netif_device_present(odev->net)) {
 677                 dev_err(&urb->dev->dev, "%s: net device not present\n",
 678                         __func__);
 679                 return;
 680         }
 681
 682         /* log status, but don't act on it, we don't need to resubmit anything
 683          * anyhow */
 684         if (status)
 685                 log_usb_status(status, __func__);
 686
 687         hso_put_activity(odev->parent);
 688
 689         /* Tell the network interface we are ready for another frame */
 690         netif_wake_queue(odev->net);
 691 }
 692
 693 /* called by kernel when we need to transmit a packet */
 694 static int hso_net_start_xmit(struct sk_buff *skb, struct net_device *net)
 695 {
 696         struct hso_net *odev = netdev_priv(net);
 697         int result;
 698
 699         /* Tell the kernel, "No more frames 'til we are done with this one." */
 700         netif_stop_queue(net);
 701         if (hso_get_activity(odev->parent) == -EAGAIN) {
 702                 odev->skb_tx_buf = skb;
 703                 return 0;
 704         }
 705
 706         /* log if asked */
 707         DUMP1(skb->data, skb->len);
 708         /* Copy it from kernel memory to OUR memory */
 709         memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
 710         D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
 711
 712         /* Fill in the URB for shipping it out. */
 713         usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
 714                           odev->parent->usb,
 715                           usb_sndbulkpipe(odev->parent->usb,
 716                                           odev->out_endp->
 717                                           bEndpointAddress & 0x7F),
 718                           odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
 719                           odev);
 720
 721         /* Deal with the Zero Length packet problem, I hope */
 722         odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
 723
 724         /* Send the URB on its merry way. */
 725         result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
 726         if (result) {
 727                 dev_warn(&odev->parent->interface->dev,
 728                         "failed mux_bulk_tx_urb %d", result);
 729                 net->stats.tx_errors++;
 730                 netif_start_queue(net);
 731         } else {
 732                 net->stats.tx_packets++;
 733                 net->stats.tx_bytes += skb->len;
 734                 /* And tell the kernel when the last transmit started. */
 735                 net->trans_start = jiffies;
 736         }
 737         dev_kfree_skb(skb);
 738         /* we're done */
 739         return result;
 740 }
 741
 742 static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
 743 {
 744         struct hso_net *odev = netdev_priv(net);
 745
 746         strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
 747         strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
 748         usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info);
 749 }
 750
 751 static struct ethtool_ops ops = {
 752         .get_drvinfo = hso_get_drvinfo,
 753         .get_link = ethtool_op_get_link
 754 };
 755
 756 /* called when a packet did not ack after watchdogtimeout */
 757 static void hso_net_tx_timeout(struct net_device *net)
 758 {
 759         struct hso_net *odev = netdev_priv(net);
 760
 761         if (!odev)
 762                 return;
 763
 764         /* Tell syslog we are hosed. */
 765         dev_warn(&net->dev, "Tx timed out.\n");
 766
 767         /* Tear the waiting frame off the list */
 768         if (odev->mux_bulk_tx_urb
 769             && (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
 770                 usb_unlink_urb(odev->mux_bulk_tx_urb);
 771
 772         /* Update statistics */
 773         net->stats.tx_errors++;
 774 }
 775
 776 /* make a real packet from the received USB buffer */
 777 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
 778                         unsigned int count, unsigned char is_eop)
 779 {
 780         unsigned short temp_bytes;
 781         unsigned short buffer_offset = 0;
 782         unsigned short frame_len;
 783         unsigned char *tmp_rx_buf;
 784
 785         /* log if needed */
 786         D1("Rx %d bytes", count);
 787         DUMP(ip_pkt, min(128, (int)count));
 788
 789         while (count) {
 790                 switch (odev->rx_parse_state) {
 791                 case WAIT_IP:
 792                         /* waiting for IP header. */
 793                         /* wanted bytes - size of ip header */
 794                         temp_bytes =
 795                             (count <
 796                              odev->rx_buf_missing) ? count : odev->
 797                             rx_buf_missing;
 798
 799                         memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
 800                                odev->rx_buf_size, ip_pkt + buffer_offset,
 801                                temp_bytes);
 802
 803                         odev->rx_buf_size += temp_bytes;
 804                         buffer_offset += temp_bytes;
 805                         odev->rx_buf_missing -= temp_bytes;
 806                         count -= temp_bytes;
 807
 808                         if (!odev->rx_buf_missing) {
 809                                 /* header is complete allocate an sk_buffer and
 810                                  * continue to WAIT_DATA */
 811                                 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
 812
 813                                 if ((frame_len > DEFAULT_MRU) ||
 814                                     (frame_len < sizeof(struct iphdr))) {
 815                                         dev_err(&odev->net->dev,
 816                                                 "Invalid frame (%d) length\n",
 817                                                 frame_len);
 818                                         odev->rx_parse_state = WAIT_SYNC;
 819                                         continue;
 820                                 }
 821                                 /* Allocate an sk_buff */
 822                                 odev->skb_rx_buf = dev_alloc_skb(frame_len);
 823                                 if (!odev->skb_rx_buf) {
 824                                         /* We got no receive buffer. */
 825                                         D1("could not allocate memory");
 826                                         odev->rx_parse_state = WAIT_SYNC;
 827                                         return;
 828                                 }
 829                                 /* Here's where it came from */
 830                                 odev->skb_rx_buf->dev = odev->net;
 831
 832                                 /* Copy what we got so far. make room for iphdr
 833                                  * after tail. */
 834                                 tmp_rx_buf =
 835                                     skb_put(odev->skb_rx_buf,
 836                                             sizeof(struct iphdr));
 837                                 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
 838                                        sizeof(struct iphdr));
 839
 840                                 /* ETH_HLEN */
 841                                 odev->rx_buf_size = sizeof(struct iphdr);
 842
 843                                 /* Filip actually use .tot_len */
 844                                 odev->rx_buf_missing =
 845                                     frame_len - sizeof(struct iphdr);
 846                                 odev->rx_parse_state = WAIT_DATA;
 847                         }
 848                         break;
 849
 850                 case WAIT_DATA:
 851                         temp_bytes = (count < odev->rx_buf_missing)
 852                                         ? count : odev->rx_buf_missing;
 853
 854                         /* Copy the rest of the bytes that are left in the
 855                          * buffer into the waiting sk_buf. */
 856                         /* Make room for temp_bytes after tail. */
 857                         tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
 858                         memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
 859
 860                         odev->rx_buf_missing -= temp_bytes;
 861                         count -= temp_bytes;
 862                         buffer_offset += temp_bytes;
 863                         odev->rx_buf_size += temp_bytes;
 864                         if (!odev->rx_buf_missing) {
 865                                 /* Packet is complete. Inject into stack. */
 866                                 /* We have IP packet here */
 867                                 odev->skb_rx_buf->protocol =
 868                                                 __constant_htons(ETH_P_IP);
 869                                 /* don't check it */
 870                                 odev->skb_rx_buf->ip_summed =
 871                                         CHECKSUM_UNNECESSARY;
 872
 873                                 skb_reset_mac_header(odev->skb_rx_buf);
 874
 875                                 /* Ship it off to the kernel */
 876                                 netif_rx(odev->skb_rx_buf);
 877                                 /* No longer our buffer. */
 878                                 odev->skb_rx_buf = NULL;
 879
 880                                 /* update out statistics */
 881                                 odev->net->stats.rx_packets++;
 882
 883                                 odev->net->stats.rx_bytes += odev->rx_buf_size;
 884
 885                                 odev->rx_buf_size = 0;
 886                                 odev->rx_buf_missing = sizeof(struct iphdr);
 887                                 odev->rx_parse_state = WAIT_IP;
 888                         }
 889                         break;
 890
 891                 case WAIT_SYNC:
 892                         D1(" W_S");
 893                         count = 0;
 894                         break;
 895                 default:
 896                         D1(" ");
 897                         count--;
 898                         break;
 899                 }
 900         }
 901
 902         /* Recovery mechanism for WAIT_SYNC state. */
 903         if (is_eop) {
 904                 if (odev->rx_parse_state == WAIT_SYNC) {
 905                         odev->rx_parse_state = WAIT_IP;
 906                         odev->rx_buf_size = 0;
 907                         odev->rx_buf_missing = sizeof(struct iphdr);
 908                 }
 909         }
 910 }
 911
 912 /* Moving data from usb to kernel (in interrupt state) */
 913 static void read_bulk_callback(struct urb *urb)
 914 {
 915         struct hso_net *odev = urb->context;
 916         struct net_device *net;
 917         int result;
 918         int status = urb->status;
 919
 920         /* is al ok?  (Filip: Who's Al ?) */
 921         if (status) {
 922                 log_usb_status(status, __func__);
 923                 return;
 924         }
 925
 926         /* Sanity check */
 927         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
 928                 D1("BULK IN callback but driver is not active!");
 929                 return;
 930         }
 931         usb_mark_last_busy(urb->dev);
 932
 933         net = odev->net;
 934
 935         if (!netif_device_present(net)) {
 936                 /* Somebody killed our network interface... */
 937                 return;
 938         }
 939
 940         if (odev->parent->port_spec & HSO_INFO_CRC_BUG) {
 941                 u32 rest;
 942                 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
 943                 rest = urb->actual_length % odev->in_endp->wMaxPacketSize;
 944                 if (((rest == 5) || (rest == 6))
 945                     && !memcmp(((u8 *) urb->transfer_buffer) +
 946                                urb->actual_length - 4, crc_check, 4)) {
 947                         urb->actual_length -= 4;
 948                 }
 949         }
 950
 951         /* do we even have a packet? */
 952         if (urb->actual_length) {
 953                 /* Handle the IP stream, add header and push it onto network
 954                  * stack if the packet is complete. */
 955                 spin_lock(&odev->net_lock);
 956                 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
 957                             (urb->transfer_buffer_length >
 958                              urb->actual_length) ? 1 : 0);
 959                 spin_unlock(&odev->net_lock);
 960         }
 961
 962         /* We are done with this URB, resubmit it. Prep the USB to wait for
 963          * another frame. Reuse same as received. */
 964         usb_fill_bulk_urb(urb,
 965                           odev->parent->usb,
 966                           usb_rcvbulkpipe(odev->parent->usb,
 967                                           odev->in_endp->
 968                                           bEndpointAddress & 0x7F),
 969                           urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
 970                           read_bulk_callback, odev);
 971
 972         /* Give this to the USB subsystem so it can tell us when more data
 973          * arrives. */
 974         result = usb_submit_urb(urb, GFP_ATOMIC);
 975         if (result)
 976                 dev_warn(&odev->parent->interface->dev,
 977                          "%s failed submit mux_bulk_rx_urb %d", __func__,
 978                          result);
 979 }
 980
 981 /* Serial driver functions */
 982
 983 static void _hso_serial_set_termios(struct tty_struct *tty,
 984                                     struct ktermios *old)
 985 {
 986         struct hso_serial *serial = get_serial_by_tty(tty);
 987         struct ktermios *termios;
 988
 989         if ((!tty) || (!tty->termios) || (!serial)) {
 990                 printk(KERN_ERR "%s: no tty structures", __func__);
 991                 return;
 992         }
 993
 994         D4("port %d", serial->minor);
 995
 996         /*
 997          * The default requirements for this device are:
 998          */
 999         termios = tty->termios;
1000         termios->c_iflag &=
1001                 ~(IGNBRK        /* disable ignore break */
1002                 | BRKINT        /* disable break causes interrupt */
1003                 | PARMRK        /* disable mark parity errors */
1004                 | ISTRIP        /* disable clear high bit of input characters */
1005                 | INLCR         /* disable translate NL to CR */
1006                 | IGNCR         /* disable ignore CR */
1007                 | ICRNL         /* disable translate CR to NL */
1008                 | IXON);        /* disable enable XON/XOFF flow control */
1009
1010         /* disable postprocess output characters */
1011         termios->c_oflag &= ~OPOST;
1012
1013         termios->c_lflag &=
1014                 ~(ECHO          /* disable echo input characters */
1015                 | ECHONL        /* disable echo new line */
1016                 | ICANON        /* disable erase, kill, werase, and rprnt
1017                                    special characters */
1018                 | ISIG          /* disable interrupt, quit, and suspend special
1019                                    characters */
1020                 | IEXTEN);      /* disable non-POSIX special characters */
1021
1022         termios->c_cflag &=
1023                 ~(CSIZE         /* no size */
1024                 | PARENB        /* disable parity bit */
1025                 | CBAUD         /* clear current baud rate */
1026                 | CBAUDEX);     /* clear current buad rate */
1027
1028         termios->c_cflag |= CS8;        /* character size 8 bits */
1029
1030         /* baud rate 115200 */
1031         tty_encode_baud_rate(serial->tty, 115200, 115200);
1032
1033         /*
1034          * Force low_latency on; otherwise the pushes are scheduled;
1035          * this is bad as it opens up the possibility of dropping bytes
1036          * on the floor.  We don't want to drop bytes on the floor. :)
1037          */
1038         serial->tty->low_latency = 1;
1039         return;
1040 }
1041
1042 /* open the requested serial port */
1043 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1044 {
1045         struct hso_serial *serial = get_serial_by_index(tty->index);
1046         int result;
1047
1048         /* sanity check */
1049         if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1050                 tty->driver_data = NULL;
1051                 D1("Failed to open port");
1052                 return -ENODEV;
1053         }
1054
1055         mutex_lock(&serial->parent->mutex);
1056         result = usb_autopm_get_interface(serial->parent->interface);
1057         if (result < 0)
1058                 goto err_out;
1059
1060         D1("Opening %d", serial->minor);
1061         kref_get(&serial->parent->ref);
1062
1063         /* setup */
1064         tty->driver_data = serial;
1065         serial->tty = tty;
1066
1067         /* check for port allready opened, if not set the termios */
1068         serial->open_count++;
1069         if (serial->open_count == 1) {
1070                 tty->low_latency = 1;
1071                 serial->flags = 0;
1072                 /* Force default termio settings */
1073                 _hso_serial_set_termios(tty, NULL);
1074                 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1075                 if (result) {
1076                         hso_stop_serial_device(serial->parent);
1077                         serial->open_count--;
1078                         kref_put(&serial->parent->ref, hso_serial_ref_free);
1079                 }
1080         } else {
1081                 D1("Port was already open");
1082         }
1083
1084         usb_autopm_put_interface(serial->parent->interface);
1085
1086         /* done */
1087         if (result)
1088                 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0);
1089 err_out:
1090         mutex_unlock(&serial->parent->mutex);
1091         return result;
1092 }
1093
1094 /* close the requested serial port */
1095 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1096 {
1097         struct hso_serial *serial = tty->driver_data;
1098         u8 usb_gone;
1099
1100         D1("Closing serial port");
1101
1102         mutex_lock(&serial->parent->mutex);
1103         usb_gone = serial->parent->usb_gone;
1104
1105         if (!usb_gone)
1106                 usb_autopm_get_interface(serial->parent->interface);
1107
1108         /* reset the rts and dtr */
1109         /* do the actual close */
1110         serial->open_count--;
1111         kref_put(&serial->parent->ref, hso_serial_ref_free);
1112         if (serial->open_count <= 0) {
1113                 serial->open_count = 0;
1114                 if (serial->tty) {
1115                         serial->tty->driver_data = NULL;
1116                         serial->tty = NULL;
1117                 }
1118                 if (!usb_gone)
1119                         hso_stop_serial_device(serial->parent);
1120         }
1121         if (!usb_gone)
1122                 usb_autopm_put_interface(serial->parent->interface);
1123         mutex_unlock(&serial->parent->mutex);
1124 }
1125
1126 /* close the requested serial port */
1127 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1128                             int count)
1129 {
1130         struct hso_serial *serial = get_serial_by_tty(tty);
1131         int space, tx_bytes;
1132         unsigned long flags;
1133
1134         /* sanity check */
1135         if (serial == NULL) {
1136                 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1137                 return -ENODEV;
1138         }
1139
1140         spin_lock_irqsave(&serial->serial_lock, flags);
1141
1142         space = serial->tx_data_length - serial->tx_buffer_count;
1143         tx_bytes = (count < space) ? count : space;
1144
1145         if (!tx_bytes)
1146                 goto out;
1147
1148         memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1149         serial->tx_buffer_count += tx_bytes;
1150
1151 out:
1152         spin_unlock_irqrestore(&serial->serial_lock, flags);
1153
1154         hso_kick_transmit(serial);
1155         /* done */
1156         return tx_bytes;
1157 }
1158
1159 /* how much room is there for writing */
1160 static int hso_serial_write_room(struct tty_struct *tty)
1161 {
1162         struct hso_serial *serial = get_serial_by_tty(tty);
1163         int room;
1164         unsigned long flags;
1165
1166         spin_lock_irqsave(&serial->serial_lock, flags);
1167         room = serial->tx_data_length - serial->tx_buffer_count;
1168         spin_unlock_irqrestore(&serial->serial_lock, flags);
1169
1170         /* return free room */
1171         return room;
1172 }
1173
1174 /* setup the term */
1175 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1176 {
1177         struct hso_serial *serial = get_serial_by_tty(tty);
1178         unsigned long flags;
1179
1180         if (old)
1181                 D5("Termios called with: cflags new[%d] - old[%d]",
1182                    tty->termios->c_cflag, old->c_cflag);
1183
1184         /* the actual setup */
1185         spin_lock_irqsave(&serial->serial_lock, flags);
1186         if (serial->open_count)
1187                 _hso_serial_set_termios(tty, old);
1188         else
1189                 tty->termios = old;
1190         spin_unlock_irqrestore(&serial->serial_lock, flags);
1191
1192         /* done */
1193         return;
1194 }
1195
1196 /* how many characters in the buffer */
1197 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1198 {
1199         struct hso_serial *serial = get_serial_by_tty(tty);
1200         int chars;
1201         unsigned long flags;
1202
1203         /* sanity check */
1204         if (serial == NULL)
1205                 return 0;
1206
1207         spin_lock_irqsave(&serial->serial_lock, flags);
1208         chars = serial->tx_buffer_count;
1209         spin_unlock_irqrestore(&serial->serial_lock, flags);
1210
1211         return chars;
1212 }
1213
1214 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
1215 {
1216         unsigned int value;
1217         struct hso_serial *serial = get_serial_by_tty(tty);
1218         unsigned long flags;
1219
1220         /* sanity check */
1221         if (!serial) {
1222                 D1("no tty structures");
1223                 return -EINVAL;
1224         }
1225
1226         spin_lock_irqsave(&serial->serial_lock, flags);
1227         value = ((serial->rts_state) ? TIOCM_RTS : 0) |
1228             ((serial->dtr_state) ? TIOCM_DTR : 0);
1229         spin_unlock_irqrestore(&serial->serial_lock, flags);
1230
1231         return value;
1232 }
1233
1234 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
1235                                unsigned int set, unsigned int clear)
1236 {
1237         int val = 0;
1238         unsigned long flags;
1239         int if_num;
1240         struct hso_serial *serial = get_serial_by_tty(tty);
1241
1242         /* sanity check */
1243         if (!serial) {
1244                 D1("no tty structures");
1245                 return -EINVAL;
1246         }
1247         if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1248
1249         spin_lock_irqsave(&serial->serial_lock, flags);
1250         if (set & TIOCM_RTS)
1251                 serial->rts_state = 1;
1252         if (set & TIOCM_DTR)
1253                 serial->dtr_state = 1;
1254
1255         if (clear & TIOCM_RTS)
1256                 serial->rts_state = 0;
1257         if (clear & TIOCM_DTR)
1258                 serial->dtr_state = 0;
1259
1260         if (serial->dtr_state)
1261                 val |= 0x01;
1262         if (serial->rts_state)
1263                 val |= 0x02;
1264
1265         spin_unlock_irqrestore(&serial->serial_lock, flags);
1266
1267         return usb_control_msg(serial->parent->usb,
1268                                usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1269                                0x21, val, if_num, NULL, 0,
1270                                USB_CTRL_SET_TIMEOUT);
1271 }
1272
1273 /* starts a transmit */
1274 static void hso_kick_transmit(struct hso_serial *serial)
1275 {
1276         u8 *temp;
1277         unsigned long flags;
1278         int res;
1279
1280         spin_lock_irqsave(&serial->serial_lock, flags);
1281         if (!serial->tx_buffer_count)
1282                 goto out;
1283
1284         if (serial->tx_urb_used)
1285                 goto out;
1286
1287         /* Wakeup USB interface if necessary */
1288         if (hso_get_activity(serial->parent) == -EAGAIN)
1289                 goto out;
1290
1291         /* Switch pointers around to avoid memcpy */
1292         temp = serial->tx_buffer;
1293         serial->tx_buffer = serial->tx_data;
1294         serial->tx_data = temp;
1295         serial->tx_data_count = serial->tx_buffer_count;
1296         serial->tx_buffer_count = 0;
1297
1298         /* If temp is set, it means we switched buffers */
1299         if (temp && serial->write_data) {
1300                 res = serial->write_data(serial);
1301                 if (res >= 0)
1302                         serial->tx_urb_used = 1;
1303         }
1304 out:
1305         spin_unlock_irqrestore(&serial->serial_lock, flags);
1306 }
1307
1308 /* make a request (for reading and writing data to muxed serial port) */
1309 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1310                               struct urb *ctrl_urb,
1311                               struct usb_ctrlrequest *ctrl_req,
1312                               u8 *ctrl_urb_data, u32 size)
1313 {
1314         int result;
1315         int pipe;
1316
1317         /* Sanity check */
1318         if (!serial || !ctrl_urb || !ctrl_req) {
1319                 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1320                 return -EINVAL;
1321         }
1322
1323         /* initialize */
1324         ctrl_req->wValue = 0;
1325         ctrl_req->wIndex = hso_port_to_mux(port);
1326         ctrl_req->wLength = size;
1327
1328         if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1329                 /* Reading command */
1330                 ctrl_req->bRequestType = USB_DIR_IN |
1331                                          USB_TYPE_OPTION_VENDOR |
1332                                          USB_RECIP_INTERFACE;
1333                 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1334                 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1335         } else {
1336                 /* Writing command */
1337                 ctrl_req->bRequestType = USB_DIR_OUT |
1338                                          USB_TYPE_OPTION_VENDOR |
1339                                          USB_RECIP_INTERFACE;
1340                 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1341                 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1342         }
1343         /* syslog */
1344         D2("%s command (%02x) len: %d, port: %d",
1345            type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1346            ctrl_req->bRequestType, ctrl_req->wLength, port);
1347
1348         /* Load ctrl urb */
1349         ctrl_urb->transfer_flags = 0;
1350         usb_fill_control_urb(ctrl_urb,
1351                              serial->parent->usb,
1352                              pipe,
1353                              (u8 *) ctrl_req,
1354                              ctrl_urb_data, size, ctrl_callback, serial);
1355         /* Send it on merry way */
1356         result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1357         if (result) {
1358                 dev_err(&ctrl_urb->dev->dev,
1359                         "%s failed submit ctrl_urb %d type %d", __func__,
1360                         result, type);
1361                 return result;
1362         }
1363
1364         /* done */
1365         return size;
1366 }
1367
1368 /* called by intr_callback when read occurs */
1369 static int hso_mux_serial_read(struct hso_serial *serial)
1370 {
1371         if (!serial)
1372                 return -EINVAL;
1373
1374         /* clean data */
1375         memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1376         /* make the request */
1377
1378         if (serial->num_rx_urbs != 1) {
1379                 dev_err(&serial->parent->interface->dev,
1380                         "ERROR: mux'd reads with multiple buffers "
1381                         "not possible\n");
1382                 return 0;
1383         }
1384         return mux_device_request(serial,
1385                                   USB_CDC_GET_ENCAPSULATED_RESPONSE,
1386                                   serial->parent->port_spec & HSO_PORT_MASK,
1387                                   serial->rx_urb[0],
1388                                   &serial->ctrl_req_rx,
1389                                   serial->rx_data[0], serial->rx_data_length);
1390 }
1391
1392 /* used for muxed serial port callback (muxed serial read) */
1393 static void intr_callback(struct urb *urb)
1394 {
1395         struct hso_shared_int *shared_int = urb->context;
1396         struct hso_serial *serial;
1397         unsigned char *port_req;
1398         int status = urb->status;
1399         int i;
1400
1401         usb_mark_last_busy(urb->dev);
1402
1403         /* sanity check */
1404         if (!shared_int)
1405                 return;
1406
1407         /* status check */
1408         if (status) {
1409                 log_usb_status(status, __func__);
1410                 return;
1411         }
1412         D4("\n--- Got intr callback 0x%02X ---", status);
1413
1414         /* what request? */
1415         port_req = urb->transfer_buffer;
1416         D4(" port_req = 0x%.2X\n", *port_req);
1417         /* loop over all muxed ports to find the one sending this */
1418         for (i = 0; i < 8; i++) {
1419                 /* max 8 channels on MUX */
1420                 if (*port_req & (1 << i)) {
1421                         serial = get_serial_by_shared_int_and_type(shared_int,
1422                                                                    (1 << i));
1423                         if (serial != NULL) {
1424                                 D1("Pending read interrupt on port %d\n", i);
1425                                 if (!test_and_set_bit(HSO_SERIAL_FLAG_RX_SENT,
1426                                                       &serial->flags)) {
1427                                         /* Setup and send a ctrl req read on
1428                                          * port i */
1429                                         hso_mux_serial_read(serial);
1430                                 } else {
1431                                         D1("Already pending a read on "
1432                                            "port %d\n", i);
1433                                 }
1434                         }
1435                 }
1436         }
1437         /* Resubmit interrupt urb */
1438         hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1439 }
1440
1441 /* called for writing to muxed serial port */
1442 static int hso_mux_serial_write_data(struct hso_serial *serial)
1443 {
1444         if (NULL == serial)
1445                 return -EINVAL;
1446
1447         return mux_device_request(serial,
1448                                   USB_CDC_SEND_ENCAPSULATED_COMMAND,
1449                                   serial->parent->port_spec & HSO_PORT_MASK,
1450                                   serial->tx_urb,
1451                                   &serial->ctrl_req_tx,
1452                                   serial->tx_data, serial->tx_data_count);
1453 }
1454
1455 /* write callback for Diag and CS port */
1456 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1457 {
1458         struct hso_serial *serial = urb->context;
1459         int status = urb->status;
1460
1461         /* sanity check */
1462         if (!serial) {
1463                 D1("serial == NULL");
1464                 return;
1465         }
1466
1467         spin_lock(&serial->serial_lock);
1468         serial->tx_urb_used = 0;
1469         spin_unlock(&serial->serial_lock);
1470         if (status) {
1471                 log_usb_status(status, __func__);
1472                 return;
1473         }
1474         hso_put_activity(serial->parent);
1475         if (serial->tty)
1476                 tty_wakeup(serial->tty);
1477         hso_kick_transmit(serial);
1478
1479         D1(" ");
1480         return;
1481 }
1482
1483 /* called for writing diag or CS serial port */
1484 static int hso_std_serial_write_data(struct hso_serial *serial)
1485 {
1486         int count = serial->tx_data_count;
1487         int result;
1488
1489         usb_fill_bulk_urb(serial->tx_urb,
1490                           serial->parent->usb,
1491                           usb_sndbulkpipe(serial->parent->usb,
1492                                           serial->out_endp->
1493                                           bEndpointAddress & 0x7F),
1494                           serial->tx_data, serial->tx_data_count,
1495                           hso_std_serial_write_bulk_callback, serial);
1496
1497         result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1498         if (result) {
1499                 dev_warn(&serial->parent->usb->dev,
1500                          "Failed to submit urb - res %d\n", result);
1501                 return result;
1502         }
1503
1504         return count;
1505 }
1506
1507 /* callback after read or write on muxed serial port */
1508 static void ctrl_callback(struct urb *urb)
1509 {
1510         struct hso_serial *serial = urb->context;
1511         struct usb_ctrlrequest *req;
1512         int status = urb->status;
1513
1514         /* sanity check */
1515         if (!serial)
1516                 return;
1517
1518         spin_lock(&serial->serial_lock);
1519         serial->tx_urb_used = 0;
1520         spin_unlock(&serial->serial_lock);
1521         if (status) {
1522                 log_usb_status(status, __func__);
1523                 return;
1524         }
1525
1526         /* what request? */
1527         req = (struct usb_ctrlrequest *)(urb->setup_packet);
1528         D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
1529         D4("Actual length of urb = %d\n", urb->actual_length);
1530         DUMP1(urb->transfer_buffer, urb->actual_length);
1531
1532         if (req->bRequestType ==
1533             (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
1534                 /* response to a read command */
1535                 if (serial->open_count > 0) {
1536                         /* handle RX data the normal way */
1537                         put_rxbuf_data(urb, serial);
1538                 }
1539
1540                 /* Re issue a read as long as we receive data. */
1541                 if (urb->actual_length != 0)
1542                         hso_mux_serial_read(serial);
1543                 else
1544                         clear_bit(HSO_SERIAL_FLAG_RX_SENT, &serial->flags);
1545         } else {
1546                 hso_put_activity(serial->parent);
1547                 if (serial->tty)
1548                         tty_wakeup(serial->tty);
1549                 /* response to a write command */
1550                 hso_kick_transmit(serial);
1551         }
1552 }
1553
1554 /* handle RX data for serial port */
1555 static void put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
1556 {
1557         struct tty_struct *tty = serial->tty;
1558
1559         /* Sanity check */
1560         if (urb == NULL || serial == NULL) {
1561                 D1("serial = NULL");
1562                 return;
1563         }
1564
1565         /* Push data to tty */
1566         if (tty && urb->actual_length) {
1567                 D1("data to push to tty");
1568                 tty_insert_flip_string(tty, urb->transfer_buffer,
1569                                        urb->actual_length);
1570                 tty_flip_buffer_push(tty);
1571         }
1572 }
1573
1574 /* read callback for Diag and CS port */
1575 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1576 {
1577         struct hso_serial *serial = urb->context;
1578         int result;
1579         int status = urb->status;
1580
1581         /* sanity check */
1582         if (!serial) {
1583                 D1("serial == NULL");
1584                 return;
1585         } else if (status) {
1586                 log_usb_status(status, __func__);
1587                 return;
1588         }
1589
1590         D4("\n--- Got serial_read_bulk callback %02x ---", status);
1591         D1("Actual length = %d\n", urb->actual_length);
1592         DUMP1(urb->transfer_buffer, urb->actual_length);
1593
1594         /* Anyone listening? */
1595         if (serial->open_count == 0)
1596                 return;
1597
1598         if (status == 0) {
1599                 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) {
1600                         u32 rest;
1601                         u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1602                         rest =
1603                             urb->actual_length %
1604                             serial->in_endp->wMaxPacketSize;
1605                         if (((rest == 5) || (rest == 6))
1606                             && !memcmp(((u8 *) urb->transfer_buffer) +
1607                                        urb->actual_length - 4, crc_check, 4)) {
1608                                 urb->actual_length -= 4;
1609                         }
1610                 }
1611                 /* Valid data, handle RX data */
1612                 put_rxbuf_data(urb, serial);
1613         } else if (status == -ENOENT || status == -ECONNRESET) {
1614                 /* Unlinked - check for throttled port. */
1615                 D2("Port %d, successfully unlinked urb", serial->minor);
1616         } else {
1617                 D2("Port %d, status = %d for read urb", serial->minor, status);
1618                 return;
1619         }
1620
1621         usb_mark_last_busy(urb->dev);
1622
1623         /* We are done with this URB, resubmit it. Prep the USB to wait for
1624          * another frame */
1625         usb_fill_bulk_urb(urb, serial->parent->usb,
1626                           usb_rcvbulkpipe(serial->parent->usb,
1627                                           serial->in_endp->
1628                                           bEndpointAddress & 0x7F),
1629                           urb->transfer_buffer, serial->rx_data_length,
1630                           hso_std_serial_read_bulk_callback, serial);
1631         /* Give this to the USB subsystem so it can tell us when more data
1632          * arrives. */
1633         result = usb_submit_urb(urb, GFP_ATOMIC);
1634         if (result) {
1635                 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d",
1636                         __func__, result);
1637         }
1638 }
1639
1640 /* Base driver functions */
1641
1642 static void hso_log_port(struct hso_device *hso_dev)
1643 {
1644         char *port_type;
1645         char port_dev[20];
1646
1647         switch (hso_dev->port_spec & HSO_PORT_MASK) {
1648         case HSO_PORT_CONTROL:
1649                 port_type = "Control";
1650                 break;
1651         case HSO_PORT_APP:
1652                 port_type = "Application";
1653                 break;
1654         case HSO_PORT_GPS:
1655                 port_type = "GPS";
1656                 break;
1657         case HSO_PORT_GPS_CONTROL:
1658                 port_type = "GPS control";
1659                 break;
1660         case HSO_PORT_APP2:
1661                 port_type = "Application2";
1662                 break;
1663         case HSO_PORT_PCSC:
1664                 port_type = "PCSC";
1665                 break;
1666         case HSO_PORT_DIAG:
1667                 port_type = "Diagnostic";
1668                 break;
1669         case HSO_PORT_DIAG2:
1670                 port_type = "Diagnostic2";
1671                 break;
1672         case HSO_PORT_MODEM:
1673                 port_type = "Modem";
1674                 break;
1675         case HSO_PORT_NETWORK:
1676                 port_type = "Network";
1677                 break;
1678         default:
1679                 port_type = "Unknown";
1680                 break;
1681         }
1682         if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
1683                 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
1684         } else
1685                 sprintf(port_dev, "/dev/%s%d", tty_filename,
1686                         dev2ser(hso_dev)->minor);
1687
1688         dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
1689                 port_type, port_dev);
1690 }
1691
1692 static int hso_start_net_device(struct hso_device *hso_dev)
1693 {
1694         int i, result = 0;
1695         struct hso_net *hso_net = dev2net(hso_dev);
1696
1697         if (!hso_net)
1698                 return -ENODEV;
1699
1700         /* send URBs for all read buffers */
1701         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
1702
1703                 /* Prep a receive URB */
1704                 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
1705                                   hso_dev->usb,
1706                                   usb_rcvbulkpipe(hso_dev->usb,
1707                                                   hso_net->in_endp->
1708                                                   bEndpointAddress & 0x7F),
1709                                   hso_net->mux_bulk_rx_buf_pool[i],
1710                                   MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
1711                                   hso_net);
1712
1713                 /* Put it out there so the device can send us stuff */
1714                 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
1715                                         GFP_NOIO);
1716                 if (result)
1717                         dev_warn(&hso_dev->usb->dev,
1718                                 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
1719                                 i, result);
1720         }
1721
1722         return result;
1723 }
1724
1725 static int hso_stop_net_device(struct hso_device *hso_dev)
1726 {
1727         int i;
1728         struct hso_net *hso_net = dev2net(hso_dev);
1729
1730         if (!hso_net)
1731                 return -ENODEV;
1732
1733         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
1734                 if (hso_net->mux_bulk_rx_urb_pool[i])
1735                         usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
1736
1737         }
1738         if (hso_net->mux_bulk_tx_urb)
1739                 usb_kill_urb(hso_net->mux_bulk_tx_urb);
1740
1741         return 0;
1742 }
1743
1744 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
1745 {
1746         int i, result = 0;
1747         struct hso_serial *serial = dev2ser(hso_dev);
1748
1749         if (!serial)
1750                 return -ENODEV;
1751
1752         /* If it is not the MUX port fill in and submit a bulk urb (already
1753          * allocated in hso_serial_start) */
1754         if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
1755                 for (i = 0; i < serial->num_rx_urbs; i++) {
1756                         usb_fill_bulk_urb(serial->rx_urb[i],
1757                                           serial->parent->usb,
1758                                           usb_rcvbulkpipe(serial->parent->usb,
1759                                                           serial->in_endp->
1760                                                           bEndpointAddress &
1761                                                           0x7F),
1762                                           serial->rx_data[i],
1763                                           serial->rx_data_length,
1764                                           hso_std_serial_read_bulk_callback,
1765                                           serial);
1766                         result = usb_submit_urb(serial->rx_urb[i], flags);
1767                         if (result) {
1768                                 dev_warn(&serial->parent->usb->dev,
1769                                          "Failed to submit urb - res %d\n",
1770                                          result);
1771                                 break;
1772                         }
1773                 }
1774         } else {
1775                 mutex_lock(&serial->shared_int->shared_int_lock);
1776                 if (!serial->shared_int->use_count) {
1777                         result =
1778                             hso_mux_submit_intr_urb(serial->shared_int,
1779                                                     hso_dev->usb, flags);
1780                 }
1781                 serial->shared_int->use_count++;
1782                 mutex_unlock(&serial->shared_int->shared_int_lock);
1783         }
1784
1785         return result;
1786 }
1787
1788 static int hso_stop_serial_device(struct hso_device *hso_dev)
1789 {
1790         int i;
1791         struct hso_serial *serial = dev2ser(hso_dev);
1792
1793         if (!serial)
1794                 return -ENODEV;
1795
1796         for (i = 0; i < serial->num_rx_urbs; i++) {
1797                 if (serial->rx_urb[i])
1798                                 usb_kill_urb(serial->rx_urb[i]);
1799         }
1800
1801         if (serial->tx_urb)
1802                 usb_kill_urb(serial->tx_urb);
1803
1804         if (serial->shared_int) {
1805                 mutex_lock(&serial->shared_int->shared_int_lock);
1806                 if (serial->shared_int->use_count &&
1807                     (--serial->shared_int->use_count == 0)) {
1808                         struct urb *urb;
1809
1810                         urb = serial->shared_int->shared_intr_urb;
1811                         if (urb)
1812                                 usb_kill_urb(urb);
1813                 }
1814                 mutex_unlock(&serial->shared_int->shared_int_lock);
1815         }
1816
1817         return 0;
1818 }
1819
1820 static void hso_serial_common_free(struct hso_serial *serial)
1821 {
1822         int i;
1823
1824         if (serial->parent->dev)
1825                 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
1826
1827         tty_unregister_device(tty_drv, serial->minor);
1828
1829         for (i = 0; i < serial->num_rx_urbs; i++) {
1830                 /* unlink and free RX URB */
1831                 usb_free_urb(serial->rx_urb[i]);
1832                 /* free the RX buffer */
1833                 kfree(serial->rx_data[i]);
1834         }
1835
1836         /* unlink and free TX URB */
1837         usb_free_urb(serial->tx_urb);
1838         kfree(serial->tx_data);
1839 }
1840
1841 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
1842                                     int rx_size, int tx_size)
1843 {
1844         struct device *dev;
1845         int minor;
1846         int i;
1847
1848         minor = get_free_serial_index();
1849         if (minor < 0)
1850                 goto exit;
1851
1852         /* register our minor number */
1853         serial->parent->dev = tty_register_device(tty_drv, minor,
1854                                         &serial->parent->interface->dev);
1855         dev = serial->parent->dev;
1856         dev->driver_data = serial->parent;
1857         i = device_create_file(dev, &dev_attr_hsotype);
1858
1859         /* fill in specific data for later use */
1860         serial->minor = minor;
1861         serial->magic = HSO_SERIAL_MAGIC;
1862         spin_lock_init(&serial->serial_lock);
1863         serial->num_rx_urbs = num_urbs;
1864
1865         /* RX, allocate urb and initialize */
1866
1867         /* prepare our RX buffer */
1868         serial->rx_data_length = rx_size;
1869         for (i = 0; i < serial->num_rx_urbs; i++) {
1870                 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
1871                 if (!serial->rx_urb[i]) {
1872                         dev_err(dev, "Could not allocate urb?\n");
1873                         goto exit;
1874                 }
1875                 serial->rx_urb[i]->transfer_buffer = NULL;
1876                 serial->rx_urb[i]->transfer_buffer_length = 0;
1877                 serial->rx_data[i] = kzalloc(serial->rx_data_length,
1878                                              GFP_KERNEL);
1879                 if (!serial->rx_data[i]) {
1880                         dev_err(dev, "%s - Out of memory\n", __func__);
1881                         goto exit;
1882                 }
1883         }
1884
1885         /* TX, allocate urb and initialize */
1886         serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1887         if (!serial->tx_urb) {
1888                 dev_err(dev, "Could not allocate urb?\n");
1889                 goto exit;
1890         }
1891         serial->tx_urb->transfer_buffer = NULL;
1892         serial->tx_urb->transfer_buffer_length = 0;
1893         /* prepare our TX buffer */
1894         serial->tx_data_count = 0;
1895         serial->tx_buffer_count = 0;
1896         serial->tx_data_length = tx_size;
1897         serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
1898         if (!serial->tx_data) {
1899                 dev_err(dev, "%s - Out of memory", __func__);
1900                 goto exit;
1901         }
1902         serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
1903         if (!serial->tx_buffer) {
1904                 dev_err(dev, "%s - Out of memory", __func__);
1905                 goto exit;
1906         }
1907
1908         return 0;
1909 exit:
1910         hso_serial_common_free(serial);
1911         return -1;
1912 }
1913
1914 /* Frees a general hso device */
1915 static void hso_free_device(struct hso_device *hso_dev)
1916 {
1917         kfree(hso_dev);
1918 }
1919
1920 /* Creates a general hso device */
1921 static struct hso_device *hso_create_device(struct usb_interface *intf,
1922                                             int port_spec)
1923 {
1924         struct hso_device *hso_dev;
1925
1926         hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
1927         if (!hso_dev)
1928                 return NULL;
1929
1930         hso_dev->port_spec = port_spec;
1931         hso_dev->usb = interface_to_usbdev(intf);
1932         hso_dev->interface = intf;
1933         kref_init(&hso_dev->ref);
1934         mutex_init(&hso_dev->mutex);
1935
1936         INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
1937         INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
1938
1939         return hso_dev;
1940 }
1941
1942 /* Removes a network device in the network device table */
1943 static int remove_net_device(struct hso_device *hso_dev)
1944 {
1945         int i;
1946
1947         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
1948                 if (network_table[i] == hso_dev) {
1949                         network_table[i] = NULL;
1950                         break;
1951                 }
1952         }
1953         if (i == HSO_MAX_NET_DEVICES)
1954                 return -1;
1955         return 0;
1956 }
1957
1958 /* Frees our network device */
1959 static void hso_free_net_device(struct hso_device *hso_dev)
1960 {
1961         int i;
1962         struct hso_net *hso_net = dev2net(hso_dev);
1963
1964         if (!hso_net)
1965                 return;
1966
1967         /* start freeing */
1968         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
1969                 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
1970                 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
1971         }
1972         usb_free_urb(hso_net->mux_bulk_tx_urb);
1973         kfree(hso_net->mux_bulk_tx_buf);
1974
1975         remove_net_device(hso_net->parent);
1976
1977         if (hso_net->net) {
1978                 unregister_netdev(hso_net->net);
1979                 free_netdev(hso_net->net);
1980         }
1981
1982         hso_free_device(hso_dev);
1983 }
1984
1985 /* initialize the network interface */
1986 static void hso_net_init(struct net_device *net)
1987 {
1988         struct hso_net *hso_net = netdev_priv(net);
1989
1990         D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
1991
1992         /* fill in the other fields */
1993         net->open = hso_net_open;
1994         net->stop = hso_net_close;
1995         net->hard_start_xmit = hso_net_start_xmit;
1996         net->tx_timeout = hso_net_tx_timeout;
1997         net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
1998         net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
1999         net->type = ARPHRD_NONE;
2000         net->mtu = DEFAULT_MTU - 14;
2001         net->tx_queue_len = 10;
2002         SET_ETHTOOL_OPS(net, &ops);
2003
2004         /* and initialize the semaphore */
2005         spin_lock_init(&hso_net->net_lock);
2006 }
2007
2008 /* Adds a network device in the network device table */
2009 static int add_net_device(struct hso_device *hso_dev)
2010 {
2011         int i;
2012
2013         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2014                 if (network_table[i] == NULL) {
2015                         network_table[i] = hso_dev;
2016                         break;
2017                 }
2018         }
2019         if (i == HSO_MAX_NET_DEVICES)
2020                 return -1;
2021         return 0;
2022 }
2023
2024 static int hso_radio_toggle(void *data, enum rfkill_state state)
2025 {
2026         struct hso_device *hso_dev = data;
2027         int enabled = (state == RFKILL_STATE_ON);
2028         int rv;
2029
2030         mutex_lock(&hso_dev->mutex);
2031         if (hso_dev->usb_gone)
2032                 rv = 0;
2033         else
2034                 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2035                                        enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2036                                        USB_CTRL_SET_TIMEOUT);
2037         mutex_unlock(&hso_dev->mutex);
2038         return rv;
2039 }
2040
2041 /* Creates and sets up everything for rfkill */
2042 static void hso_create_rfkill(struct hso_device *hso_dev,
2043                              struct usb_interface *interface)
2044 {
2045         struct hso_net *hso_net = dev2net(hso_dev);
2046         struct device *dev = hso_dev->dev;
2047         char *rfkn;
2048
2049         hso_net->rfkill = rfkill_allocate(&interface_to_usbdev(interface)->dev,
2050                                  RFKILL_TYPE_WLAN);
2051         if (!hso_net->rfkill) {
2052                 dev_err(dev, "%s - Out of memory", __func__);
2053                 return;
2054         }
2055         rfkn = kzalloc(20, GFP_KERNEL);
2056         if (!rfkn) {
2057                 rfkill_free(hso_net->rfkill);
2058                 dev_err(dev, "%s - Out of memory", __func__);
2059                 return;
2060         }
2061         snprintf(rfkn, 20, "hso-%d",
2062                  interface->altsetting->desc.bInterfaceNumber);
2063         hso_net->rfkill->name = rfkn;
2064         hso_net->rfkill->state = RFKILL_STATE_ON;
2065         hso_net->rfkill->data = hso_dev;
2066         hso_net->rfkill->toggle_radio = hso_radio_toggle;
2067         if (rfkill_register(hso_net->rfkill) < 0) {
2068                 kfree(rfkn);
2069                 hso_net->rfkill->name = NULL;
2070                 rfkill_free(hso_net->rfkill);
2071                 dev_err(dev, "%s - Failed to register rfkill", __func__);
2072                 return;
2073         }
2074 }
2075
2076 /* Creates our network device */
2077 static struct hso_device *hso_create_net_device(struct usb_interface *interface)
2078 {
2079         int result, i;
2080         struct net_device *net;
2081         struct hso_net *hso_net;
2082         struct hso_device *hso_dev;
2083
2084         hso_dev = hso_create_device(interface, HSO_INTF_MUX | HSO_PORT_NETWORK);
2085         if (!hso_dev)
2086                 return NULL;
2087
2088         /* allocate our network device, then we can put in our private data */
2089         /* call hso_net_init to do the basic initialization */
2090         net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2091         if (!net) {
2092                 dev_err(&interface->dev, "Unable to create ethernet device\n");
2093                 goto exit;
2094         }
2095
2096         hso_net = netdev_priv(net);
2097
2098         hso_dev->port_data.dev_net = hso_net;
2099         hso_net->net = net;
2100         hso_net->parent = hso_dev;
2101
2102         hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2103                                       USB_DIR_IN);
2104         if (!hso_net->in_endp) {
2105                 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2106                 goto exit;
2107         }
2108         hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2109                                        USB_DIR_OUT);
2110         if (!hso_net->out_endp) {
2111                 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2112                 goto exit;
2113         }
2114         SET_NETDEV_DEV(net, &interface->dev);
2115
2116         /* registering our net device */
2117         result = register_netdev(net);
2118         if (result) {
2119                 dev_err(&interface->dev, "Failed to register device\n");
2120                 goto exit;
2121         }
2122
2123         /* start allocating */
2124         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2125                 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2126                 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2127                         dev_err(&interface->dev, "Could not allocate rx urb\n");
2128                         goto exit;
2129                 }
2130                 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2131                                                            GFP_KERNEL);
2132                 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2133                         dev_err(&interface->dev, "Could not allocate rx buf\n");
2134                         goto exit;
2135                 }
2136         }
2137         hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2138         if (!hso_net->mux_bulk_tx_urb) {
2139                 dev_err(&interface->dev, "Could not allocate tx urb\n");
2140                 goto exit;
2141         }
2142         hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2143         if (!hso_net->mux_bulk_tx_buf) {
2144                 dev_err(&interface->dev, "Could not allocate tx buf\n");
2145                 goto exit;
2146         }
2147
2148         add_net_device(hso_dev);
2149
2150         hso_log_port(hso_dev);
2151
2152         hso_create_rfkill(hso_dev, interface);
2153
2154         return hso_dev;
2155 exit:
2156         hso_free_net_device(hso_dev);
2157         return NULL;
2158 }
2159
2160 /* Frees an AT channel ( goes for both mux and non-mux ) */
2161 static void hso_free_serial_device(struct hso_device *hso_dev)
2162 {
2163         struct hso_serial *serial = dev2ser(hso_dev);
2164
2165         if (!serial)
2166                 return;
2167         set_serial_by_index(serial->minor, NULL);
2168
2169         hso_serial_common_free(serial);
2170
2171         if (serial->shared_int) {
2172                 mutex_lock(&serial->shared_int->shared_int_lock);
2173                 if (--serial->shared_int->ref_count == 0)
2174                         hso_free_shared_int(serial->shared_int);
2175                 else
2176                         mutex_unlock(&serial->shared_int->shared_int_lock);
2177         }
2178         kfree(serial);
2179         hso_free_device(hso_dev);
2180 }
2181
2182 /* Creates a bulk AT channel */
2183 static struct hso_device *hso_create_bulk_serial_device(
2184                         struct usb_interface *interface, int port)
2185 {
2186         struct hso_device *hso_dev;
2187         struct hso_serial *serial;
2188         int num_urbs;
2189
2190         hso_dev = hso_create_device(interface, port);
2191         if (!hso_dev)
2192                 return NULL;
2193
2194         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2195         if (!serial)
2196                 goto exit;
2197
2198         serial->parent = hso_dev;
2199         hso_dev->port_data.dev_serial = serial;
2200
2201         if (port & HSO_PORT_MODEM)
2202                 num_urbs = 2;
2203         else
2204                 num_urbs = 1;
2205
2206         if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2207                                      BULK_URB_TX_SIZE))
2208                 goto exit;
2209
2210         serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2211                                      USB_DIR_IN);
2212         if (!serial->in_endp) {
2213                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2214                 goto exit;
2215         }
2216
2217         if (!
2218             (serial->out_endp =
2219              hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2220                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2221                 goto exit;
2222         }
2223
2224         serial->write_data = hso_std_serial_write_data;
2225
2226         /* and record this serial */
2227         set_serial_by_index(serial->minor, serial);
2228
2229         /* setup the proc dirs and files if needed */
2230         hso_log_port(hso_dev);
2231
2232         /* done, return it */
2233         return hso_dev;
2234 exit:
2235         if (hso_dev && serial)
2236                 hso_serial_common_free(serial);
2237         kfree(serial);
2238         hso_free_device(hso_dev);
2239         return NULL;
2240 }
2241
2242 /* Creates a multiplexed AT channel */
2243 static
2244 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2245                                                 int port,
2246                                                 struct hso_shared_int *mux)
2247 {
2248         struct hso_device *hso_dev;
2249         struct hso_serial *serial;
2250         int port_spec;
2251
2252         port_spec = HSO_INTF_MUX;
2253         port_spec &= ~HSO_PORT_MASK;
2254
2255         port_spec |= hso_mux_to_port(port);
2256         if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2257                 return NULL;
2258
2259         hso_dev = hso_create_device(interface, port_spec);
2260         if (!hso_dev)
2261                 return NULL;
2262
2263         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2264         if (!serial)
2265                 goto exit;
2266
2267         hso_dev->port_data.dev_serial = serial;
2268         serial->parent = hso_dev;
2269
2270         if (hso_serial_common_create
2271             (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2272                 goto exit;
2273
2274         serial->tx_data_length--;
2275         serial->write_data = hso_mux_serial_write_data;
2276
2277         serial->shared_int = mux;
2278         mutex_lock(&serial->shared_int->shared_int_lock);
2279         serial->shared_int->ref_count++;
2280         mutex_unlock(&serial->shared_int->shared_int_lock);
2281
2282         /* and record this serial */
2283         set_serial_by_index(serial->minor, serial);
2284
2285         /* setup the proc dirs and files if needed */
2286         hso_log_port(hso_dev);
2287
2288         /* done, return it */
2289         return hso_dev;
2290
2291 exit:
2292         if (serial) {
2293                 tty_unregister_device(tty_drv, serial->minor);
2294                 kfree(serial);
2295         }
2296         if (hso_dev)
2297                 hso_free_device(hso_dev);
2298         return NULL;
2299
2300 }
2301
2302 static void hso_free_shared_int(struct hso_shared_int *mux)
2303 {
2304         usb_free_urb(mux->shared_intr_urb);
2305         kfree(mux->shared_intr_buf);
2306         mutex_unlock(&mux->shared_int_lock);
2307         kfree(mux);
2308 }
2309
2310 static
2311 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2312 {
2313         struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2314
2315         if (!mux)
2316                 return NULL;
2317
2318         mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2319                                     USB_DIR_IN);
2320         if (!mux->intr_endp) {
2321                 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2322                 goto exit;
2323         }
2324
2325         mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2326         if (!mux->shared_intr_urb) {
2327                 dev_err(&interface->dev, "Could not allocate intr urb?");
2328                 goto exit;
2329         }
2330         mux->shared_intr_buf = kzalloc(mux->intr_endp->wMaxPacketSize,
2331                                        GFP_KERNEL);
2332         if (!mux->shared_intr_buf) {
2333                 dev_err(&interface->dev, "Could not allocate intr buf?");
2334                 goto exit;
2335         }
2336
2337         mutex_init(&mux->shared_int_lock);
2338
2339         return mux;
2340
2341 exit:
2342         kfree(mux->shared_intr_buf);
2343         usb_free_urb(mux->shared_intr_urb);
2344         kfree(mux);
2345         return NULL;
2346 }
2347
2348 /* Gets the port spec for a certain interface */
2349 static int hso_get_config_data(struct usb_interface *interface)
2350 {
2351         struct usb_device *usbdev = interface_to_usbdev(interface);
2352         u8 config_data[17];
2353         u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2354         s32 result;
2355
2356         if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2357                             0x86, 0xC0, 0, 0, config_data, 17,
2358                             USB_CTRL_SET_TIMEOUT) != 0x11) {
2359                 return -EIO;
2360         }
2361
2362         switch (config_data[if_num]) {
2363         case 0x0:
2364                 result = 0;
2365                 break;
2366         case 0x1:
2367                 result = HSO_PORT_DIAG;
2368                 break;
2369         case 0x2:
2370                 result = HSO_PORT_GPS;
2371                 break;
2372         case 0x3:
2373                 result = HSO_PORT_GPS_CONTROL;
2374                 break;
2375         case 0x4:
2376                 result = HSO_PORT_APP;
2377                 break;
2378         case 0x5:
2379                 result = HSO_PORT_APP2;
2380                 break;
2381         case 0x6:
2382                 result = HSO_PORT_CONTROL;
2383                 break;
2384         case 0x7:
2385                 result = HSO_PORT_NETWORK;
2386                 break;
2387         case 0x8:
2388                 result = HSO_PORT_MODEM;
2389                 break;
2390         case 0x9:
2391                 result = HSO_PORT_MSD;
2392                 break;
2393         case 0xa:
2394                 result = HSO_PORT_PCSC;
2395                 break;
2396         case 0xb:
2397                 result = HSO_PORT_VOICE;
2398                 break;
2399         default:
2400                 result = 0;
2401         }
2402
2403         if (result)
2404                 result |= HSO_INTF_BULK;
2405
2406         if (config_data[16] & 0x1)
2407                 result |= HSO_INFO_CRC_BUG;
2408
2409         return result;
2410 }
2411
2412 /* called once for each interface upon device insertion */
2413 static int hso_probe(struct usb_interface *interface,
2414                      const struct usb_device_id *id)
2415 {
2416         int mux, i, if_num, port_spec;
2417         unsigned char port_mask;
2418         struct hso_device *hso_dev = NULL;
2419         struct hso_shared_int *shared_int;
2420         struct hso_device *tmp_dev = NULL;
2421
2422         if_num = interface->altsetting->desc.bInterfaceNumber;
2423
2424         /* Get the interface/port specification from either driver_info or from
2425          * the device itself */
2426         if (id->driver_info)
2427                 port_spec = ((u32 *)(id->driver_info))[if_num];
2428         else
2429                 port_spec = hso_get_config_data(interface);
2430
2431         if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2432                 dev_err(&interface->dev, "Not our interface\n");
2433                 return -ENODEV;
2434         }
2435         /* Check if we need to switch to alt interfaces prior to port
2436          * configuration */
2437         if (interface->num_altsetting > 1)
2438                 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2439         interface->needs_remote_wakeup = 1;
2440
2441         /* Allocate new hso device(s) */
2442         switch (port_spec & HSO_INTF_MASK) {
2443         case HSO_INTF_MUX:
2444                 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2445                         /* Create the network device */
2446                         if (!disable_net) {
2447                                 hso_dev = hso_create_net_device(interface);
2448                                 if (!hso_dev)
2449                                         goto exit;
2450                                 tmp_dev = hso_dev;
2451                         }
2452                 }
2453
2454                 if (hso_get_mux_ports(interface, &port_mask))
2455                         /* TODO: de-allocate everything */
2456                         goto exit;
2457
2458                 shared_int = hso_create_shared_int(interface);
2459                 if (!shared_int)
2460                         goto exit;
2461
2462                 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2463                         if (port_mask & i) {
2464                                 hso_dev = hso_create_mux_serial_device(
2465                                                 interface, i, shared_int);
2466                                 if (!hso_dev)
2467                                         goto exit;
2468                         }
2469                 }
2470
2471                 if (tmp_dev)
2472                         hso_dev = tmp_dev;
2473                 break;
2474
2475         case HSO_INTF_BULK:
2476                 /* It's a regular bulk interface */
2477                 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK)
2478                     && !disable_net)
2479                         hso_dev = hso_create_net_device(interface);
2480                 else
2481                         hso_dev =
2482                             hso_create_bulk_serial_device(interface, port_spec);
2483                 if (!hso_dev)
2484                         goto exit;
2485                 break;
2486         default:
2487                 goto exit;
2488         }
2489
2490         usb_driver_claim_interface(&hso_driver, interface, hso_dev);
2491
2492         /* save our data pointer in this device */
2493         usb_set_intfdata(interface, hso_dev);
2494
2495         /* done */
2496         return 0;
2497 exit:
2498         hso_free_interface(interface);
2499         return -ENODEV;
2500 }
2501
2502 /* device removed, cleaning up */
2503 static void hso_disconnect(struct usb_interface *interface)
2504 {
2505         hso_free_interface(interface);
2506
2507         /* remove reference of our private data */
2508         usb_set_intfdata(interface, NULL);
2509
2510         usb_driver_release_interface(&hso_driver, interface);
2511 }
2512
2513 static void async_get_intf(struct work_struct *data)
2514 {
2515         struct hso_device *hso_dev =
2516             container_of(data, struct hso_device, async_get_intf);
2517         usb_autopm_get_interface(hso_dev->interface);
2518 }
2519
2520 static void async_put_intf(struct work_struct *data)
2521 {
2522         struct hso_device *hso_dev =
2523             container_of(data, struct hso_device, async_put_intf);
2524         usb_autopm_put_interface(hso_dev->interface);
2525 }
2526
2527 static int hso_get_activity(struct hso_device *hso_dev)
2528 {
2529         if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
2530                 if (!hso_dev->is_active) {
2531                         hso_dev->is_active = 1;
2532                         schedule_work(&hso_dev->async_get_intf);
2533                 }
2534         }
2535
2536         if (hso_dev->usb->state != USB_STATE_CONFIGURED)
2537                 return -EAGAIN;
2538
2539         usb_mark_last_busy(hso_dev->usb);
2540
2541         return 0;
2542 }
2543
2544 static int hso_put_activity(struct hso_device *hso_dev)
2545 {
2546         if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
2547                 if (hso_dev->is_active) {
2548                         hso_dev->is_active = 0;
2549                         schedule_work(&hso_dev->async_put_intf);
2550                         return -EAGAIN;
2551                 }
2552         }
2553         hso_dev->is_active = 0;
2554         return 0;
2555 }
2556
2557 /* called by kernel when we need to suspend device */
2558 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
2559 {
2560         int i, result;
2561
2562         /* Stop all serial ports */
2563         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
2564                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
2565                         result = hso_stop_serial_device(serial_table[i]);
2566                         if (result)
2567                                 goto out;
2568                 }
2569         }
2570
2571         /* Stop all network ports */
2572         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2573                 if (network_table[i] &&
2574                     (network_table[i]->interface == iface)) {
2575                         result = hso_stop_net_device(network_table[i]);
2576                         if (result)
2577                                 goto out;
2578                 }
2579         }
2580
2581 out:
2582         return 0;
2583 }
2584
2585 /* called by kernel when we need to resume device */
2586 static int hso_resume(struct usb_interface *iface)
2587 {
2588         int i, result = 0;
2589         struct hso_net *hso_net;
2590
2591         /* Start all serial ports */
2592         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
2593                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
2594                         if (dev2ser(serial_table[i])->open_count) {
2595                                 result =
2596                                     hso_start_serial_device(serial_table[i], GFP_NOIO);
2597                                 hso_kick_transmit(dev2ser(serial_table[i]));
2598                                 if (result)
2599                                         goto out;
2600                         }
2601                 }
2602         }
2603
2604         /* Start all network ports */
2605         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2606                 if (network_table[i] &&
2607                     (network_table[i]->interface == iface)) {
2608                         hso_net = dev2net(network_table[i]);
2609                         /* First transmit any lingering data, then restart the
2610                          * device. */
2611                         if (hso_net->skb_tx_buf) {
2612                                 dev_dbg(&iface->dev,
2613                                         "Transmitting lingering data\n");
2614                                 hso_net_start_xmit(hso_net->skb_tx_buf,
2615                                                    hso_net->net);
2616                         }
2617                         result = hso_start_net_device(network_table[i]);
2618                         if (result)
2619                                 goto out;
2620                 }
2621         }
2622
2623 out:
2624         return result;
2625 }
2626
2627 static void hso_serial_ref_free(struct kref *ref)
2628 {
2629         struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
2630
2631         hso_free_serial_device(hso_dev);
2632 }
2633
2634 static void hso_free_interface(struct usb_interface *interface)
2635 {
2636         struct hso_serial *hso_dev;
2637         int i;
2638
2639         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
2640                 if (serial_table[i]
2641                     && (serial_table[i]->interface == interface)) {
2642                         hso_dev = dev2ser(serial_table[i]);
2643                         if (hso_dev->tty)
2644                                 tty_hangup(hso_dev->tty);
2645                         mutex_lock(&hso_dev->parent->mutex);
2646                         hso_dev->parent->usb_gone = 1;
2647                         mutex_unlock(&hso_dev->parent->mutex);
2648                         kref_put(&serial_table[i]->ref, hso_serial_ref_free);
2649                 }
2650         }
2651
2652         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2653                 if (network_table[i]
2654                     && (network_table[i]->interface == interface)) {
2655                         struct rfkill *rfk = dev2net(network_table[i])->rfkill;
2656                         /* hso_stop_net_device doesn't stop the net queue since
2657                          * traffic needs to start it again when suspended */
2658                         netif_stop_queue(dev2net(network_table[i])->net);
2659                         hso_stop_net_device(network_table[i]);
2660                         cancel_work_sync(&network_table[i]->async_put_intf);
2661                         cancel_work_sync(&network_table[i]->async_get_intf);
2662                         if (rfk)
2663                                 rfkill_unregister(rfk);
2664                         hso_free_net_device(network_table[i]);
2665                 }
2666         }
2667 }
2668
2669 /* Helper functions */
2670
2671 /* Get the endpoint ! */
2672 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
2673                                                   int type, int dir)
2674 {
2675         int i;
2676         struct usb_host_interface *iface = intf->cur_altsetting;
2677         struct usb_endpoint_descriptor *endp;
2678
2679         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
2680                 endp = &iface->endpoint[i].desc;
2681                 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
2682                     ((endp->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == type))
2683                         return endp;
2684         }
2685
2686         return NULL;
2687 }
2688
2689 /* Get the byte that describes which ports are enabled */
2690 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
2691 {
2692         int i;
2693         struct usb_host_interface *iface = intf->cur_altsetting;
2694
2695         if (iface->extralen == 3) {
2696                 *ports = iface->extra[2];
2697                 return 0;
2698         }
2699
2700         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
2701                 if (iface->endpoint[i].extralen == 3) {
2702                         *ports = iface->endpoint[i].extra[2];
2703                         return 0;
2704                 }
2705         }
2706
2707         return -1;
2708 }
2709
2710 /* interrupt urb needs to be submitted, used for serial read of muxed port */
2711 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
2712                                    struct usb_device *usb, gfp_t gfp)
2713 {
2714         int result;
2715
2716         usb_fill_int_urb(shared_int->shared_intr_urb, usb,
2717                          usb_rcvintpipe(usb,
2718                                 shared_int->intr_endp->bEndpointAddress & 0x7F),
2719                          shared_int->shared_intr_buf,
2720                          shared_int->intr_endp->wMaxPacketSize,
2721                          intr_callback, shared_int,
2722                          shared_int->intr_endp->bInterval);
2723
2724         result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
2725         if (result)
2726                 dev_warn(&usb->dev, "%s failed mux_intr_urb %d", __func__,
2727                         result);
2728
2729         return result;
2730 }
2731
2732 /* operations setup of the serial interface */
2733 static const struct tty_operations hso_serial_ops = {
2734         .open = hso_serial_open,
2735         .close = hso_serial_close,
2736         .write = hso_serial_write,
2737         .write_room = hso_serial_write_room,
2738         .set_termios = hso_serial_set_termios,
2739         .chars_in_buffer = hso_serial_chars_in_buffer,
2740         .tiocmget = hso_serial_tiocmget,
2741         .tiocmset = hso_serial_tiocmset,
2742 };
2743
2744 static struct usb_driver hso_driver = {
2745         .name = driver_name,
2746         .probe = hso_probe,
2747         .disconnect = hso_disconnect,
2748         .id_table = hso_ids,
2749         .suspend = hso_suspend,
2750         .resume = hso_resume,
2751         .supports_autosuspend = 1,
2752 };
2753
2754 static int __init hso_init(void)
2755 {
2756         int i;
2757         int result;
2758
2759         /* put it in the log */
2760         printk(KERN_INFO "hso: %s\n", version);
2761
2762         /* Initialise the serial table semaphore and table */
2763         spin_lock_init(&serial_table_lock);
2764         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
2765                 serial_table[i] = NULL;
2766
2767         /* allocate our driver using the proper amount of supported minors */
2768         tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
2769         if (!tty_drv)
2770                 return -ENOMEM;
2771
2772         /* fill in all needed values */
2773         tty_drv->magic = TTY_DRIVER_MAGIC;
2774         tty_drv->owner = THIS_MODULE;
2775         tty_drv->driver_name = driver_name;
2776         tty_drv->name = tty_filename;
2777
2778         /* if major number is provided as parameter, use that one */
2779         if (tty_major)
2780                 tty_drv->major = tty_major;
2781
2782         tty_drv->minor_start = 0;
2783         tty_drv->num = HSO_SERIAL_TTY_MINORS;
2784         tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
2785         tty_drv->subtype = SERIAL_TYPE_NORMAL;
2786         tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
2787         tty_drv->init_termios = tty_std_termios;
2788         tty_drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
2789         tty_drv->termios = hso_serial_termios;
2790         tty_drv->termios_locked = hso_serial_termios_locked;
2791         tty_set_operations(tty_drv, &hso_serial_ops);
2792
2793         /* register the tty driver */
2794         result = tty_register_driver(tty_drv);
2795         if (result) {
2796                 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
2797                         __func__, result);
2798                 return result;
2799         }
2800
2801         /* register this module as an usb driver */
2802         result = usb_register(&hso_driver);
2803         if (result) {
2804                 printk(KERN_ERR "Could not register hso driver? error: %d\n",
2805                         result);
2806                 /* cleanup serial interface */
2807                 tty_unregister_driver(tty_drv);
2808                 return result;
2809         }
2810
2811         /* done */
2812         return 0;
2813 }
2814
2815 static void __exit hso_exit(void)
2816 {
2817         printk(KERN_INFO "hso: unloaded\n");
2818
2819         tty_unregister_driver(tty_drv);
2820         /* deregister the usb driver */
2821         usb_deregister(&hso_driver);
2822 }
2823
2824 /* Module definitions */
2825 module_init(hso_init);
2826 module_exit(hso_exit);
2827
2828 MODULE_AUTHOR(MOD_AUTHOR);
2829 MODULE_DESCRIPTION(MOD_DESCRIPTION);
2830 MODULE_LICENSE(MOD_LICENSE);
2831 MODULE_INFO(Version, DRIVER_VERSION);
2832
2833 /* change the debug level (eg: insmod hso.ko debug=0x04) */
2834 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
2835 module_param(debug, int, S_IRUGO | S_IWUSR);
2836
2837 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
2838 MODULE_PARM_DESC(tty_major, "Set the major tty number");
2839 module_param(tty_major, int, S_IRUGO | S_IWUSR);
2840
2841 /* disable network interface (eg: insmod hso.ko disable_net=1) */
2842 MODULE_PARM_DESC(disable_net, "Disable the network interface");
2843 module_param(disable_net, int, S_IRUGO | S_IWUSR);