drivers/net/usb/hso.c

   1 /******************************************************************************
   2  *
   3  * Driver for Option High Speed Mobile Devices.
   4  *
   5  *  Copyright (C) 2008 Option International
   6  *                     Filip Aben <f.aben@option.com>
   7  *                     Denis Joseph Barrow <d.barow@option.com>
   8  *                     Jan Dumon <j.dumon@option.com>
   9  *  Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
  10  *                      <ajb@spheresystems.co.uk>
  11  *  Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
  12  *  Copyright (C) 2008 Novell, Inc.
  13  *
  14  *  This program is free software; you can redistribute it and/or modify
  15  *  it under the terms of the GNU General Public License version 2 as
  16  *  published by the Free Software Foundation.
  17  *
  18  *  This program is distributed in the hope that it will be useful,
  19  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  *  GNU General Public License for more details.
  22  *
  23  *  You should have received a copy of the GNU General Public License
  24  *  along with this program; if not, write to the Free Software
  25  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  26  *  USA
  27  *
  28  *
  29  *****************************************************************************/
  30
  31 /******************************************************************************
  32  *
  33  * Description of the device:
  34  *
  35  * Interface 0: Contains the IP network interface on the bulk end points.
  36  *              The multiplexed serial ports are using the interrupt and
  37  *              control endpoints.
  38  *              Interrupt contains a bitmap telling which multiplexed
  39  *              serialport needs servicing.
  40  *
  41  * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
  42  *              port is opened, as this have a huge impact on the network port
  43  *              throughput.
  44  *
  45  * Interface 2: Standard modem interface - circuit switched interface, this
  46  *              can be used to make a standard ppp connection however it
  47  *              should not be used in conjunction with the IP network interface
  48  *              enabled for USB performance reasons i.e. if using this set
  49  *              ideally disable_net=1.
  50  *
  51  *****************************************************************************/
  52
  53 #include <linux/sched.h>
  54 #include <linux/slab.h>
  55 #include <linux/init.h>
  56 #include <linux/delay.h>
  57 #include <linux/netdevice.h>
  58 #include <linux/module.h>
  59 #include <linux/ethtool.h>
  60 #include <linux/usb.h>
  61 #include <linux/timer.h>
  62 #include <linux/tty.h>
  63 #include <linux/tty_driver.h>
  64 #include <linux/tty_flip.h>
  65 #include <linux/kmod.h>
  66 #include <linux/rfkill.h>
  67 #include <linux/ip.h>
  68 #include <linux/uaccess.h>
  69 #include <linux/usb/cdc.h>
  70 #include <net/arp.h>
  71 #include <asm/byteorder.h>
  72 #include <linux/serial_core.h>
  73 #include <linux/serial.h>
  74
  75
  76 #define MOD_AUTHOR                      "Option Wireless"
  77 #define MOD_DESCRIPTION                 "USB High Speed Option driver"
  78 #define MOD_LICENSE                     "GPL"
  79
  80 #define HSO_MAX_NET_DEVICES             10
  81 #define HSO__MAX_MTU                    2048
  82 #define DEFAULT_MTU                     1500
  83 #define DEFAULT_MRU                     1500
  84
  85 #define CTRL_URB_RX_SIZE                1024
  86 #define CTRL_URB_TX_SIZE                64
  87
  88 #define BULK_URB_RX_SIZE                4096
  89 #define BULK_URB_TX_SIZE                8192
  90
  91 #define MUX_BULK_RX_BUF_SIZE            HSO__MAX_MTU
  92 #define MUX_BULK_TX_BUF_SIZE            HSO__MAX_MTU
  93 #define MUX_BULK_RX_BUF_COUNT           4
  94 #define USB_TYPE_OPTION_VENDOR          0x20
  95
  96 /* These definitions are used with the struct hso_net flags element */
  97 /* - use *_bit operations on it. (bit indices not values.) */
  98 #define HSO_NET_RUNNING                 0
  99
 100 #define HSO_NET_TX_TIMEOUT              (HZ*10)
 101
 102 #define HSO_SERIAL_MAGIC                0x48534f31
 103
 104 /* Number of ttys to handle */
 105 #define HSO_SERIAL_TTY_MINORS           256
 106
 107 #define MAX_RX_URBS                     2
 108
 109 static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty)
 110 {
 111         if (tty)
 112                 return tty->driver_data;
 113         return NULL;
 114 }
 115
 116 /*****************************************************************************/
 117 /* Debugging functions                                                       */
 118 /*****************************************************************************/
 119 #define D__(lvl_, fmt, arg...)                          \
 120         do {                                            \
 121                 printk(lvl_ "[%d:%s]: " fmt "\n",       \
 122                        __LINE__, __func__, ## arg);     \
 123         } while (0)
 124
 125 #define D_(lvl, args...)                                \
 126         do {                                            \
 127                 if (lvl & debug)                        \
 128                         D__(KERN_INFO, args);           \
 129         } while (0)
 130
 131 #define D1(args...)     D_(0x01, ##args)
 132 #define D2(args...)     D_(0x02, ##args)
 133 #define D3(args...)     D_(0x04, ##args)
 134 #define D4(args...)     D_(0x08, ##args)
 135 #define D5(args...)     D_(0x10, ##args)
 136
 137 /*****************************************************************************/
 138 /* Enumerators                                                               */
 139 /*****************************************************************************/
 140 enum pkt_parse_state {
 141         WAIT_IP,
 142         WAIT_DATA,
 143         WAIT_SYNC
 144 };
 145
 146 /*****************************************************************************/
 147 /* Structs                                                                   */
 148 /*****************************************************************************/
 149
 150 struct hso_shared_int {
 151         struct usb_endpoint_descriptor *intr_endp;
 152         void *shared_intr_buf;
 153         struct urb *shared_intr_urb;
 154         struct usb_device *usb;
 155         int use_count;
 156         int ref_count;
 157         struct mutex shared_int_lock;
 158 };
 159
 160 struct hso_net {
 161         struct hso_device *parent;
 162         struct net_device *net;
 163         struct rfkill *rfkill;
 164
 165         struct usb_endpoint_descriptor *in_endp;
 166         struct usb_endpoint_descriptor *out_endp;
 167
 168         struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
 169         struct urb *mux_bulk_tx_urb;
 170         void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
 171         void *mux_bulk_tx_buf;
 172
 173         struct sk_buff *skb_rx_buf;
 174         struct sk_buff *skb_tx_buf;
 175
 176         enum pkt_parse_state rx_parse_state;
 177         spinlock_t net_lock;
 178
 179         unsigned short rx_buf_size;
 180         unsigned short rx_buf_missing;
 181         struct iphdr rx_ip_hdr;
 182
 183         unsigned long flags;
 184 };
 185
 186 enum rx_ctrl_state{
 187         RX_IDLE,
 188         RX_SENT,
 189         RX_PENDING
 190 };
 191
 192 #define BM_REQUEST_TYPE (0xa1)
 193 #define B_NOTIFICATION  (0x20)
 194 #define W_VALUE         (0x0)
 195 #define W_INDEX         (0x2)
 196 #define W_LENGTH        (0x2)
 197
 198 #define B_OVERRUN       (0x1<<6)
 199 #define B_PARITY        (0x1<<5)
 200 #define B_FRAMING       (0x1<<4)
 201 #define B_RING_SIGNAL   (0x1<<3)
 202 #define B_BREAK         (0x1<<2)
 203 #define B_TX_CARRIER    (0x1<<1)
 204 #define B_RX_CARRIER    (0x1<<0)
 205
 206 struct hso_serial_state_notification {
 207         u8 bmRequestType;
 208         u8 bNotification;
 209         u16 wValue;
 210         u16 wIndex;
 211         u16 wLength;
 212         u16 UART_state_bitmap;
 213 } __packed;
 214
 215 struct hso_tiocmget {
 216         struct mutex mutex;
 217         wait_queue_head_t waitq;
 218         int    intr_completed;
 219         struct usb_endpoint_descriptor *endp;
 220         struct urb *urb;
 221         struct hso_serial_state_notification serial_state_notification;
 222         u16    prev_UART_state_bitmap;
 223         struct uart_icount icount;
 224 };
 225
 226
 227 struct hso_serial {
 228         struct hso_device *parent;
 229         int magic;
 230         u8 minor;
 231
 232         struct hso_shared_int *shared_int;
 233
 234         /* rx/tx urb could be either a bulk urb or a control urb depending
 235            on which serial port it is used on. */
 236         struct urb *rx_urb[MAX_RX_URBS];
 237         u8 num_rx_urbs;
 238         u8 *rx_data[MAX_RX_URBS];
 239         u16 rx_data_length;     /* should contain allocated length */
 240
 241         struct urb *tx_urb;
 242         u8 *tx_data;
 243         u8 *tx_buffer;
 244         u16 tx_data_length;     /* should contain allocated length */
 245         u16 tx_data_count;
 246         u16 tx_buffer_count;
 247         struct usb_ctrlrequest ctrl_req_tx;
 248         struct usb_ctrlrequest ctrl_req_rx;
 249
 250         struct usb_endpoint_descriptor *in_endp;
 251         struct usb_endpoint_descriptor *out_endp;
 252
 253         enum rx_ctrl_state rx_state;
 254         u8 rts_state;
 255         u8 dtr_state;
 256         unsigned tx_urb_used:1;
 257
 258         /* from usb_serial_port */
 259         struct tty_struct *tty;
 260         int open_count;
 261         spinlock_t serial_lock;
 262
 263         int (*write_data) (struct hso_serial *serial);
 264         struct hso_tiocmget  *tiocmget;
 265         /* Hacks required to get flow control
 266          * working on the serial receive buffers
 267          * so as not to drop characters on the floor.
 268          */
 269         int  curr_rx_urb_idx;
 270         u16  curr_rx_urb_offset;
 271         u8   rx_urb_filled[MAX_RX_URBS];
 272         struct tasklet_struct unthrottle_tasklet;
 273         struct work_struct    retry_unthrottle_workqueue;
 274 };
 275
 276 struct hso_device {
 277         union {
 278                 struct hso_serial *dev_serial;
 279                 struct hso_net *dev_net;
 280         } port_data;
 281
 282         u32 port_spec;
 283
 284         u8 is_active;
 285         u8 usb_gone;
 286         struct work_struct async_get_intf;
 287         struct work_struct async_put_intf;
 288         struct work_struct reset_device;
 289
 290         struct usb_device *usb;
 291         struct usb_interface *interface;
 292
 293         struct device *dev;
 294         struct kref ref;
 295         struct mutex mutex;
 296 };
 297
 298 /* Type of interface */
 299 #define HSO_INTF_MASK           0xFF00
 300 #define HSO_INTF_MUX            0x0100
 301 #define HSO_INTF_BULK           0x0200
 302
 303 /* Type of port */
 304 #define HSO_PORT_MASK           0xFF
 305 #define HSO_PORT_NO_PORT        0x0
 306 #define HSO_PORT_CONTROL        0x1
 307 #define HSO_PORT_APP            0x2
 308 #define HSO_PORT_GPS            0x3
 309 #define HSO_PORT_PCSC           0x4
 310 #define HSO_PORT_APP2           0x5
 311 #define HSO_PORT_GPS_CONTROL    0x6
 312 #define HSO_PORT_MSD            0x7
 313 #define HSO_PORT_VOICE          0x8
 314 #define HSO_PORT_DIAG2          0x9
 315 #define HSO_PORT_DIAG           0x10
 316 #define HSO_PORT_MODEM          0x11
 317 #define HSO_PORT_NETWORK        0x12
 318
 319 /* Additional device info */
 320 #define HSO_INFO_MASK           0xFF000000
 321 #define HSO_INFO_CRC_BUG        0x01000000
 322
 323 /*****************************************************************************/
 324 /* Prototypes                                                                */
 325 /*****************************************************************************/
 326 /* Serial driver functions */
 327 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
 328                                unsigned int set, unsigned int clear);
 329 static void ctrl_callback(struct urb *urb);
 330 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
 331 static void hso_kick_transmit(struct hso_serial *serial);
 332 /* Helper functions */
 333 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
 334                                    struct usb_device *usb, gfp_t gfp);
 335 static void handle_usb_error(int status, const char *function,
 336                              struct hso_device *hso_dev);
 337 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
 338                                                   int type, int dir);
 339 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
 340 static void hso_free_interface(struct usb_interface *intf);
 341 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
 342 static int hso_stop_serial_device(struct hso_device *hso_dev);
 343 static int hso_start_net_device(struct hso_device *hso_dev);
 344 static void hso_free_shared_int(struct hso_shared_int *shared_int);
 345 static int hso_stop_net_device(struct hso_device *hso_dev);
 346 static void hso_serial_ref_free(struct kref *ref);
 347 static void hso_std_serial_read_bulk_callback(struct urb *urb);
 348 static int hso_mux_serial_read(struct hso_serial *serial);
 349 static void async_get_intf(struct work_struct *data);
 350 static void async_put_intf(struct work_struct *data);
 351 static int hso_put_activity(struct hso_device *hso_dev);
 352 static int hso_get_activity(struct hso_device *hso_dev);
 353 static void tiocmget_intr_callback(struct urb *urb);
 354 static void reset_device(struct work_struct *data);
 355 /*****************************************************************************/
 356 /* Helping functions                                                         */
 357 /*****************************************************************************/
 358
 359 /* #define DEBUG */
 360
 361 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
 362 {
 363         return hso_dev->port_data.dev_net;
 364 }
 365
 366 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
 367 {
 368         return hso_dev->port_data.dev_serial;
 369 }
 370
 371 /* Debugging functions */
 372 #ifdef DEBUG
 373 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
 374                      unsigned int len)
 375 {
 376         static char name[255];
 377
 378         sprintf(name, "hso[%d:%s]", line_count, func_name);
 379         print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
 380 }
 381
 382 #define DUMP(buf_, len_)        \
 383         dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
 384
 385 #define DUMP1(buf_, len_)                       \
 386         do {                                    \
 387                 if (0x01 & debug)               \
 388                         DUMP(buf_, len_);       \
 389         } while (0)
 390 #else
 391 #define DUMP(buf_, len_)
 392 #define DUMP1(buf_, len_)
 393 #endif
 394
 395 /* module parameters */
 396 static int debug;
 397 static int tty_major;
 398 static int disable_net;
 399
 400 /* driver info */
 401 static const char driver_name[] = "hso";
 402 static const char tty_filename[] = "ttyHS";
 403 static const char *version = __FILE__ ": " MOD_AUTHOR;
 404 /* the usb driver itself (registered in hso_init) */
 405 static struct usb_driver hso_driver;
 406 /* serial structures */
 407 static struct tty_driver *tty_drv;
 408 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
 409 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
 410 static spinlock_t serial_table_lock;
 411
 412 static const s32 default_port_spec[] = {
 413         HSO_INTF_MUX | HSO_PORT_NETWORK,
 414         HSO_INTF_BULK | HSO_PORT_DIAG,
 415         HSO_INTF_BULK | HSO_PORT_MODEM,
 416         0
 417 };
 418
 419 static const s32 icon321_port_spec[] = {
 420         HSO_INTF_MUX | HSO_PORT_NETWORK,
 421         HSO_INTF_BULK | HSO_PORT_DIAG2,
 422         HSO_INTF_BULK | HSO_PORT_MODEM,
 423         HSO_INTF_BULK | HSO_PORT_DIAG,
 424         0
 425 };
 426
 427 #define default_port_device(vendor, product)    \
 428         USB_DEVICE(vendor, product),    \
 429                 .driver_info = (kernel_ulong_t)default_port_spec
 430
 431 #define icon321_port_device(vendor, product)    \
 432         USB_DEVICE(vendor, product),    \
 433                 .driver_info = (kernel_ulong_t)icon321_port_spec
 434
 435 /* list of devices we support */
 436 static const struct usb_device_id hso_ids[] = {
 437         {default_port_device(0x0af0, 0x6711)},
 438         {default_port_device(0x0af0, 0x6731)},
 439         {default_port_device(0x0af0, 0x6751)},
 440         {default_port_device(0x0af0, 0x6771)},
 441         {default_port_device(0x0af0, 0x6791)},
 442         {default_port_device(0x0af0, 0x6811)},
 443         {default_port_device(0x0af0, 0x6911)},
 444         {default_port_device(0x0af0, 0x6951)},
 445         {default_port_device(0x0af0, 0x6971)},
 446         {default_port_device(0x0af0, 0x7011)},
 447         {default_port_device(0x0af0, 0x7031)},
 448         {default_port_device(0x0af0, 0x7051)},
 449         {default_port_device(0x0af0, 0x7071)},
 450         {default_port_device(0x0af0, 0x7111)},
 451         {default_port_device(0x0af0, 0x7211)},
 452         {default_port_device(0x0af0, 0x7251)},
 453         {default_port_device(0x0af0, 0x7271)},
 454         {default_port_device(0x0af0, 0x7311)},
 455         {default_port_device(0x0af0, 0xc031)},  /* Icon-Edge */
 456         {icon321_port_device(0x0af0, 0xd013)},  /* Module HSxPA */
 457         {icon321_port_device(0x0af0, 0xd031)},  /* Icon-321 */
 458         {icon321_port_device(0x0af0, 0xd033)},  /* Icon-322 */
 459         {USB_DEVICE(0x0af0, 0x7301)},           /* GE40x */
 460         {USB_DEVICE(0x0af0, 0x7361)},           /* GE40x */
 461         {USB_DEVICE(0x0af0, 0x7381)},           /* GE40x */
 462         {USB_DEVICE(0x0af0, 0x7401)},           /* GI 0401 */
 463         {USB_DEVICE(0x0af0, 0x7501)},           /* GTM 382 */
 464         {USB_DEVICE(0x0af0, 0x7601)},           /* GE40x */
 465         {USB_DEVICE(0x0af0, 0x7701)},
 466         {USB_DEVICE(0x0af0, 0x7706)},
 467         {USB_DEVICE(0x0af0, 0x7801)},
 468         {USB_DEVICE(0x0af0, 0x7901)},
 469         {USB_DEVICE(0x0af0, 0x7A01)},
 470         {USB_DEVICE(0x0af0, 0x7A05)},
 471         {USB_DEVICE(0x0af0, 0x8200)},
 472         {USB_DEVICE(0x0af0, 0x8201)},
 473         {USB_DEVICE(0x0af0, 0x8300)},
 474         {USB_DEVICE(0x0af0, 0x8302)},
 475         {USB_DEVICE(0x0af0, 0x8304)},
 476         {USB_DEVICE(0x0af0, 0x8400)},
 477         {USB_DEVICE(0x0af0, 0x8600)},
 478         {USB_DEVICE(0x0af0, 0x8800)},
 479         {USB_DEVICE(0x0af0, 0x8900)},
 480         {USB_DEVICE(0x0af0, 0x9000)},
 481         {USB_DEVICE(0x0af0, 0xd035)},
 482         {USB_DEVICE(0x0af0, 0xd055)},
 483         {USB_DEVICE(0x0af0, 0xd155)},
 484         {USB_DEVICE(0x0af0, 0xd255)},
 485         {USB_DEVICE(0x0af0, 0xd057)},
 486         {USB_DEVICE(0x0af0, 0xd157)},
 487         {USB_DEVICE(0x0af0, 0xd257)},
 488         {USB_DEVICE(0x0af0, 0xd357)},
 489         {USB_DEVICE(0x0af0, 0xd058)},
 490         {USB_DEVICE(0x0af0, 0xc100)},
 491         {}
 492 };
 493 MODULE_DEVICE_TABLE(usb, hso_ids);
 494
 495 /* Sysfs attribute */
 496 static ssize_t hso_sysfs_show_porttype(struct device *dev,
 497                                        struct device_attribute *attr,
 498                                        char *buf)
 499 {
 500         struct hso_device *hso_dev = dev_get_drvdata(dev);
 501         char *port_name;
 502
 503         if (!hso_dev)
 504                 return 0;
 505
 506         switch (hso_dev->port_spec & HSO_PORT_MASK) {
 507         case HSO_PORT_CONTROL:
 508                 port_name = "Control";
 509                 break;
 510         case HSO_PORT_APP:
 511                 port_name = "Application";
 512                 break;
 513         case HSO_PORT_APP2:
 514                 port_name = "Application2";
 515                 break;
 516         case HSO_PORT_GPS:
 517                 port_name = "GPS";
 518                 break;
 519         case HSO_PORT_GPS_CONTROL:
 520                 port_name = "GPS Control";
 521                 break;
 522         case HSO_PORT_PCSC:
 523                 port_name = "PCSC";
 524                 break;
 525         case HSO_PORT_DIAG:
 526                 port_name = "Diagnostic";
 527                 break;
 528         case HSO_PORT_DIAG2:
 529                 port_name = "Diagnostic2";
 530                 break;
 531         case HSO_PORT_MODEM:
 532                 port_name = "Modem";
 533                 break;
 534         case HSO_PORT_NETWORK:
 535                 port_name = "Network";
 536                 break;
 537         default:
 538                 port_name = "Unknown";
 539                 break;
 540         }
 541
 542         return sprintf(buf, "%s\n", port_name);
 543 }
 544 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
 545
 546 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
 547 {
 548         int idx;
 549
 550         for (idx = 0; idx < serial->num_rx_urbs; idx++)
 551                 if (serial->rx_urb[idx] == urb)
 552                         return idx;
 553         dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
 554         return -1;
 555 }
 556
 557 /* converts mux value to a port spec value */
 558 static u32 hso_mux_to_port(int mux)
 559 {
 560         u32 result;
 561
 562         switch (mux) {
 563         case 0x1:
 564                 result = HSO_PORT_CONTROL;
 565                 break;
 566         case 0x2:
 567                 result = HSO_PORT_APP;
 568                 break;
 569         case 0x4:
 570                 result = HSO_PORT_PCSC;
 571                 break;
 572         case 0x8:
 573                 result = HSO_PORT_GPS;
 574                 break;
 575         case 0x10:
 576                 result = HSO_PORT_APP2;
 577                 break;
 578         default:
 579                 result = HSO_PORT_NO_PORT;
 580         }
 581         return result;
 582 }
 583
 584 /* converts port spec value to a mux value */
 585 static u32 hso_port_to_mux(int port)
 586 {
 587         u32 result;
 588
 589         switch (port & HSO_PORT_MASK) {
 590         case HSO_PORT_CONTROL:
 591                 result = 0x0;
 592                 break;
 593         case HSO_PORT_APP:
 594                 result = 0x1;
 595                 break;
 596         case HSO_PORT_PCSC:
 597                 result = 0x2;
 598                 break;
 599         case HSO_PORT_GPS:
 600                 result = 0x3;
 601                 break;
 602         case HSO_PORT_APP2:
 603                 result = 0x4;
 604                 break;
 605         default:
 606                 result = 0x0;
 607         }
 608         return result;
 609 }
 610
 611 static struct hso_serial *get_serial_by_shared_int_and_type(
 612                                         struct hso_shared_int *shared_int,
 613                                         int mux)
 614 {
 615         int i, port;
 616
 617         port = hso_mux_to_port(mux);
 618
 619         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
 620                 if (serial_table[i] &&
 621                     (dev2ser(serial_table[i])->shared_int == shared_int) &&
 622                     ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
 623                         return dev2ser(serial_table[i]);
 624                 }
 625         }
 626
 627         return NULL;
 628 }
 629
 630 static struct hso_serial *get_serial_by_index(unsigned index)
 631 {
 632         struct hso_serial *serial = NULL;
 633         unsigned long flags;
 634
 635         spin_lock_irqsave(&serial_table_lock, flags);
 636         if (serial_table[index])
 637                 serial = dev2ser(serial_table[index]);
 638         spin_unlock_irqrestore(&serial_table_lock, flags);
 639
 640         return serial;
 641 }
 642
 643 static int get_free_serial_index(void)
 644 {
 645         int index;
 646         unsigned long flags;
 647
 648         spin_lock_irqsave(&serial_table_lock, flags);
 649         for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
 650                 if (serial_table[index] == NULL) {
 651                         spin_unlock_irqrestore(&serial_table_lock, flags);
 652                         return index;
 653                 }
 654         }
 655         spin_unlock_irqrestore(&serial_table_lock, flags);
 656
 657         printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
 658         return -1;
 659 }
 660
 661 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
 662 {
 663         unsigned long flags;
 664
 665         spin_lock_irqsave(&serial_table_lock, flags);
 666         if (serial)
 667                 serial_table[index] = serial->parent;
 668         else
 669                 serial_table[index] = NULL;
 670         spin_unlock_irqrestore(&serial_table_lock, flags);
 671 }
 672
 673 static void handle_usb_error(int status, const char *function,
 674                              struct hso_device *hso_dev)
 675 {
 676         char *explanation;
 677
 678         switch (status) {
 679         case -ENODEV:
 680                 explanation = "no device";
 681                 break;
 682         case -ENOENT:
 683                 explanation = "endpoint not enabled";
 684                 break;
 685         case -EPIPE:
 686                 explanation = "endpoint stalled";
 687                 break;
 688         case -ENOSPC:
 689                 explanation = "not enough bandwidth";
 690                 break;
 691         case -ESHUTDOWN:
 692                 explanation = "device disabled";
 693                 break;
 694         case -EHOSTUNREACH:
 695                 explanation = "device suspended";
 696                 break;
 697         case -EINVAL:
 698         case -EAGAIN:
 699         case -EFBIG:
 700         case -EMSGSIZE:
 701                 explanation = "internal error";
 702                 break;
 703         case -EILSEQ:
 704         case -EPROTO:
 705         case -ETIME:
 706         case -ETIMEDOUT:
 707                 explanation = "protocol error";
 708                 if (hso_dev)
 709                         schedule_work(&hso_dev->reset_device);
 710                 break;
 711         default:
 712                 explanation = "unknown status";
 713                 break;
 714         }
 715
 716         /* log a meaningful explanation of an USB status */
 717         D1("%s: received USB status - %s (%d)", function, explanation, status);
 718 }
 719
 720 /* Network interface functions */
 721
 722 /* called when net interface is brought up by ifconfig */
 723 static int hso_net_open(struct net_device *net)
 724 {
 725         struct hso_net *odev = netdev_priv(net);
 726         unsigned long flags = 0;
 727
 728         if (!odev) {
 729                 dev_err(&net->dev, "No net device !\n");
 730                 return -ENODEV;
 731         }
 732
 733         odev->skb_tx_buf = NULL;
 734
 735         /* setup environment */
 736         spin_lock_irqsave(&odev->net_lock, flags);
 737         odev->rx_parse_state = WAIT_IP;
 738         odev->rx_buf_size = 0;
 739         odev->rx_buf_missing = sizeof(struct iphdr);
 740         spin_unlock_irqrestore(&odev->net_lock, flags);
 741
 742         /* We are up and running. */
 743         set_bit(HSO_NET_RUNNING, &odev->flags);
 744         hso_start_net_device(odev->parent);
 745
 746         /* Tell the kernel we are ready to start receiving from it */
 747         netif_start_queue(net);
 748
 749         return 0;
 750 }
 751
 752 /* called when interface is brought down by ifconfig */
 753 static int hso_net_close(struct net_device *net)
 754 {
 755         struct hso_net *odev = netdev_priv(net);
 756
 757         /* we don't need the queue anymore */
 758         netif_stop_queue(net);
 759         /* no longer running */
 760         clear_bit(HSO_NET_RUNNING, &odev->flags);
 761
 762         hso_stop_net_device(odev->parent);
 763
 764         /* done */
 765         return 0;
 766 }
 767
 768 /* USB tells is xmit done, we should start the netqueue again */
 769 static void write_bulk_callback(struct urb *urb)
 770 {
 771         struct hso_net *odev = urb->context;
 772         int status = urb->status;
 773
 774         /* Sanity check */
 775         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
 776                 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
 777                 return;
 778         }
 779
 780         /* Do we still have a valid kernel network device? */
 781         if (!netif_device_present(odev->net)) {
 782                 dev_err(&urb->dev->dev, "%s: net device not present\n",
 783                         __func__);
 784                 return;
 785         }
 786
 787         /* log status, but don't act on it, we don't need to resubmit anything
 788          * anyhow */
 789         if (status)
 790                 handle_usb_error(status, __func__, odev->parent);
 791
 792         hso_put_activity(odev->parent);
 793
 794         /* Tell the network interface we are ready for another frame */
 795         netif_wake_queue(odev->net);
 796 }
 797
 798 /* called by kernel when we need to transmit a packet */
 799 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
 800                                             struct net_device *net)
 801 {
 802         struct hso_net *odev = netdev_priv(net);
 803         int result;
 804
 805         /* Tell the kernel, "No more frames 'til we are done with this one." */
 806         netif_stop_queue(net);
 807         if (hso_get_activity(odev->parent) == -EAGAIN) {
 808                 odev->skb_tx_buf = skb;
 809                 return NETDEV_TX_OK;
 810         }
 811
 812         /* log if asked */
 813         DUMP1(skb->data, skb->len);
 814         /* Copy it from kernel memory to OUR memory */
 815         memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
 816         D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
 817
 818         /* Fill in the URB for shipping it out. */
 819         usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
 820                           odev->parent->usb,
 821                           usb_sndbulkpipe(odev->parent->usb,
 822                                           odev->out_endp->
 823                                           bEndpointAddress & 0x7F),
 824                           odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
 825                           odev);
 826
 827         /* Deal with the Zero Length packet problem, I hope */
 828         odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
 829
 830         /* Send the URB on its merry way. */
 831         result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
 832         if (result) {
 833                 dev_warn(&odev->parent->interface->dev,
 834                         "failed mux_bulk_tx_urb %d\n", result);
 835                 net->stats.tx_errors++;
 836                 netif_start_queue(net);
 837         } else {
 838                 net->stats.tx_packets++;
 839                 net->stats.tx_bytes += skb->len;
 840         }
 841         dev_kfree_skb(skb);
 842         /* we're done */
 843         return NETDEV_TX_OK;
 844 }
 845
 846 static const struct ethtool_ops ops = {
 847         .get_link = ethtool_op_get_link
 848 };
 849
 850 /* called when a packet did not ack after watchdogtimeout */
 851 static void hso_net_tx_timeout(struct net_device *net)
 852 {
 853         struct hso_net *odev = netdev_priv(net);
 854
 855         if (!odev)
 856                 return;
 857
 858         /* Tell syslog we are hosed. */
 859         dev_warn(&net->dev, "Tx timed out.\n");
 860
 861         /* Tear the waiting frame off the list */
 862         if (odev->mux_bulk_tx_urb &&
 863             (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
 864                 usb_unlink_urb(odev->mux_bulk_tx_urb);
 865
 866         /* Update statistics */
 867         net->stats.tx_errors++;
 868 }
 869
 870 /* make a real packet from the received USB buffer */
 871 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
 872                         unsigned int count, unsigned char is_eop)
 873 {
 874         unsigned short temp_bytes;
 875         unsigned short buffer_offset = 0;
 876         unsigned short frame_len;
 877         unsigned char *tmp_rx_buf;
 878
 879         /* log if needed */
 880         D1("Rx %d bytes", count);
 881         DUMP(ip_pkt, min(128, (int)count));
 882
 883         while (count) {
 884                 switch (odev->rx_parse_state) {
 885                 case WAIT_IP:
 886                         /* waiting for IP header. */
 887                         /* wanted bytes - size of ip header */
 888                         temp_bytes =
 889                             (count <
 890                              odev->rx_buf_missing) ? count : odev->
 891                             rx_buf_missing;
 892
 893                         memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
 894                                odev->rx_buf_size, ip_pkt + buffer_offset,
 895                                temp_bytes);
 896
 897                         odev->rx_buf_size += temp_bytes;
 898                         buffer_offset += temp_bytes;
 899                         odev->rx_buf_missing -= temp_bytes;
 900                         count -= temp_bytes;
 901
 902                         if (!odev->rx_buf_missing) {
 903                                 /* header is complete allocate an sk_buffer and
 904                                  * continue to WAIT_DATA */
 905                                 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
 906
 907                                 if ((frame_len > DEFAULT_MRU) ||
 908                                     (frame_len < sizeof(struct iphdr))) {
 909                                         dev_err(&odev->net->dev,
 910                                                 "Invalid frame (%d) length\n",
 911                                                 frame_len);
 912                                         odev->rx_parse_state = WAIT_SYNC;
 913                                         continue;
 914                                 }
 915                                 /* Allocate an sk_buff */
 916                                 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
 917                                                                     frame_len);
 918                                 if (!odev->skb_rx_buf) {
 919                                         /* We got no receive buffer. */
 920                                         D1("could not allocate memory");
 921                                         odev->rx_parse_state = WAIT_SYNC;
 922                                         return;
 923                                 }
 924
 925                                 /* Copy what we got so far. make room for iphdr
 926                                  * after tail. */
 927                                 tmp_rx_buf =
 928                                     skb_put(odev->skb_rx_buf,
 929                                             sizeof(struct iphdr));
 930                                 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
 931                                        sizeof(struct iphdr));
 932
 933                                 /* ETH_HLEN */
 934                                 odev->rx_buf_size = sizeof(struct iphdr);
 935
 936                                 /* Filip actually use .tot_len */
 937                                 odev->rx_buf_missing =
 938                                     frame_len - sizeof(struct iphdr);
 939                                 odev->rx_parse_state = WAIT_DATA;
 940                         }
 941                         break;
 942
 943                 case WAIT_DATA:
 944                         temp_bytes = (count < odev->rx_buf_missing)
 945                                         ? count : odev->rx_buf_missing;
 946
 947                         /* Copy the rest of the bytes that are left in the
 948                          * buffer into the waiting sk_buf. */
 949                         /* Make room for temp_bytes after tail. */
 950                         tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
 951                         memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
 952
 953                         odev->rx_buf_missing -= temp_bytes;
 954                         count -= temp_bytes;
 955                         buffer_offset += temp_bytes;
 956                         odev->rx_buf_size += temp_bytes;
 957                         if (!odev->rx_buf_missing) {
 958                                 /* Packet is complete. Inject into stack. */
 959                                 /* We have IP packet here */
 960                                 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
 961                                 skb_reset_mac_header(odev->skb_rx_buf);
 962
 963                                 /* Ship it off to the kernel */
 964                                 netif_rx(odev->skb_rx_buf);
 965                                 /* No longer our buffer. */
 966                                 odev->skb_rx_buf = NULL;
 967
 968                                 /* update out statistics */
 969                                 odev->net->stats.rx_packets++;
 970
 971                                 odev->net->stats.rx_bytes += odev->rx_buf_size;
 972
 973                                 odev->rx_buf_size = 0;
 974                                 odev->rx_buf_missing = sizeof(struct iphdr);
 975                                 odev->rx_parse_state = WAIT_IP;
 976                         }
 977                         break;
 978
 979                 case WAIT_SYNC:
 980                         D1(" W_S");
 981                         count = 0;
 982                         break;
 983                 default:
 984                         D1(" ");
 985                         count--;
 986                         break;
 987                 }
 988         }
 989
 990         /* Recovery mechanism for WAIT_SYNC state. */
 991         if (is_eop) {
 992                 if (odev->rx_parse_state == WAIT_SYNC) {
 993                         odev->rx_parse_state = WAIT_IP;
 994                         odev->rx_buf_size = 0;
 995                         odev->rx_buf_missing = sizeof(struct iphdr);
 996                 }
 997         }
 998 }
 999
1000 /* Moving data from usb to kernel (in interrupt state) */
1001 static void read_bulk_callback(struct urb *urb)
1002 {
1003         struct hso_net *odev = urb->context;
1004         struct net_device *net;
1005         int result;
1006         int status = urb->status;
1007
1008         /* is al ok?  (Filip: Who's Al ?) */
1009         if (status) {
1010                 handle_usb_error(status, __func__, odev->parent);
1011                 return;
1012         }
1013
1014         /* Sanity check */
1015         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1016                 D1("BULK IN callback but driver is not active!");
1017                 return;
1018         }
1019         usb_mark_last_busy(urb->dev);
1020
1021         net = odev->net;
1022
1023         if (!netif_device_present(net)) {
1024                 /* Somebody killed our network interface... */
1025                 return;
1026         }
1027
1028         if (odev->parent->port_spec & HSO_INFO_CRC_BUG) {
1029                 u32 rest;
1030                 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1031                 rest = urb->actual_length %
1032                         le16_to_cpu(odev->in_endp->wMaxPacketSize);
1033                 if (((rest == 5) || (rest == 6)) &&
1034                     !memcmp(((u8 *) urb->transfer_buffer) +
1035                             urb->actual_length - 4, crc_check, 4)) {
1036                         urb->actual_length -= 4;
1037                 }
1038         }
1039
1040         /* do we even have a packet? */
1041         if (urb->actual_length) {
1042                 /* Handle the IP stream, add header and push it onto network
1043                  * stack if the packet is complete. */
1044                 spin_lock(&odev->net_lock);
1045                 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1046                             (urb->transfer_buffer_length >
1047                              urb->actual_length) ? 1 : 0);
1048                 spin_unlock(&odev->net_lock);
1049         }
1050
1051         /* We are done with this URB, resubmit it. Prep the USB to wait for
1052          * another frame. Reuse same as received. */
1053         usb_fill_bulk_urb(urb,
1054                           odev->parent->usb,
1055                           usb_rcvbulkpipe(odev->parent->usb,
1056                                           odev->in_endp->
1057                                           bEndpointAddress & 0x7F),
1058                           urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1059                           read_bulk_callback, odev);
1060
1061         /* Give this to the USB subsystem so it can tell us when more data
1062          * arrives. */
1063         result = usb_submit_urb(urb, GFP_ATOMIC);
1064         if (result)
1065                 dev_warn(&odev->parent->interface->dev,
1066                          "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1067                          result);
1068 }
1069
1070 /* Serial driver functions */
1071
1072 static void hso_init_termios(struct ktermios *termios)
1073 {
1074         /*
1075          * The default requirements for this device are:
1076          */
1077         termios->c_iflag &=
1078                 ~(IGNBRK        /* disable ignore break */
1079                 | BRKINT        /* disable break causes interrupt */
1080                 | PARMRK        /* disable mark parity errors */
1081                 | ISTRIP        /* disable clear high bit of input characters */
1082                 | INLCR         /* disable translate NL to CR */
1083                 | IGNCR         /* disable ignore CR */
1084                 | ICRNL         /* disable translate CR to NL */
1085                 | IXON);        /* disable enable XON/XOFF flow control */
1086
1087         /* disable postprocess output characters */
1088         termios->c_oflag &= ~OPOST;
1089
1090         termios->c_lflag &=
1091                 ~(ECHO          /* disable echo input characters */
1092                 | ECHONL        /* disable echo new line */
1093                 | ICANON        /* disable erase, kill, werase, and rprnt
1094                                    special characters */
1095                 | ISIG          /* disable interrupt, quit, and suspend special
1096                                    characters */
1097                 | IEXTEN);      /* disable non-POSIX special characters */
1098
1099         termios->c_cflag &=
1100                 ~(CSIZE         /* no size */
1101                 | PARENB        /* disable parity bit */
1102                 | CBAUD         /* clear current baud rate */
1103                 | CBAUDEX);     /* clear current buad rate */
1104
1105         termios->c_cflag |= CS8;        /* character size 8 bits */
1106
1107         /* baud rate 115200 */
1108         tty_termios_encode_baud_rate(termios, 115200, 115200);
1109 }
1110
1111 static void _hso_serial_set_termios(struct tty_struct *tty,
1112                                     struct ktermios *old)
1113 {
1114         struct hso_serial *serial = get_serial_by_tty(tty);
1115         struct ktermios *termios;
1116
1117         if (!serial) {
1118                 printk(KERN_ERR "%s: no tty structures", __func__);
1119                 return;
1120         }
1121
1122         D4("port %d", serial->minor);
1123
1124         /*
1125          *      Fix up unsupported bits
1126          */
1127         termios = tty->termios;
1128         termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1129
1130         termios->c_cflag &=
1131                 ~(CSIZE         /* no size */
1132                 | PARENB        /* disable parity bit */
1133                 | CBAUD         /* clear current baud rate */
1134                 | CBAUDEX);     /* clear current buad rate */
1135
1136         termios->c_cflag |= CS8;        /* character size 8 bits */
1137
1138         /* baud rate 115200 */
1139         tty_encode_baud_rate(tty, 115200, 115200);
1140 }
1141
1142 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1143 {
1144         int result;
1145         /* We are done with this URB, resubmit it. Prep the USB to wait for
1146          * another frame */
1147         usb_fill_bulk_urb(urb, serial->parent->usb,
1148                           usb_rcvbulkpipe(serial->parent->usb,
1149                                           serial->in_endp->
1150                                           bEndpointAddress & 0x7F),
1151                           urb->transfer_buffer, serial->rx_data_length,
1152                           hso_std_serial_read_bulk_callback, serial);
1153         /* Give this to the USB subsystem so it can tell us when more data
1154          * arrives. */
1155         result = usb_submit_urb(urb, GFP_ATOMIC);
1156         if (result) {
1157                 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1158                         __func__, result);
1159         }
1160 }
1161
1162
1163
1164
1165 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1166 {
1167         int count;
1168         struct urb *curr_urb;
1169
1170         while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1171                 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1172                 count = put_rxbuf_data(curr_urb, serial);
1173                 if (count == -1)
1174                         return;
1175                 if (count == 0) {
1176                         serial->curr_rx_urb_idx++;
1177                         if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1178                                 serial->curr_rx_urb_idx = 0;
1179                         hso_resubmit_rx_bulk_urb(serial, curr_urb);
1180                 }
1181         }
1182 }
1183
1184 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1185 {
1186         int count = 0;
1187         struct urb *urb;
1188
1189         urb = serial->rx_urb[0];
1190         if (serial->open_count > 0) {
1191                 count = put_rxbuf_data(urb, serial);
1192                 if (count == -1)
1193                         return;
1194         }
1195         /* Re issue a read as long as we receive data. */
1196
1197         if (count == 0 && ((urb->actual_length != 0) ||
1198                            (serial->rx_state == RX_PENDING))) {
1199                 serial->rx_state = RX_SENT;
1200                 hso_mux_serial_read(serial);
1201         } else
1202                 serial->rx_state = RX_IDLE;
1203 }
1204
1205
1206 /* read callback for Diag and CS port */
1207 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1208 {
1209         struct hso_serial *serial = urb->context;
1210         int status = urb->status;
1211
1212         /* sanity check */
1213         if (!serial) {
1214                 D1("serial == NULL");
1215                 return;
1216         } else if (status) {
1217                 handle_usb_error(status, __func__, serial->parent);
1218                 return;
1219         }
1220
1221         D4("\n--- Got serial_read_bulk callback %02x ---", status);
1222         D1("Actual length = %d\n", urb->actual_length);
1223         DUMP1(urb->transfer_buffer, urb->actual_length);
1224
1225         /* Anyone listening? */
1226         if (serial->open_count == 0)
1227                 return;
1228
1229         if (status == 0) {
1230                 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) {
1231                         u32 rest;
1232                         u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1233                         rest =
1234                             urb->actual_length %
1235                             le16_to_cpu(serial->in_endp->wMaxPacketSize);
1236                         if (((rest == 5) || (rest == 6)) &&
1237                             !memcmp(((u8 *) urb->transfer_buffer) +
1238                                     urb->actual_length - 4, crc_check, 4)) {
1239                                 urb->actual_length -= 4;
1240                         }
1241                 }
1242                 /* Valid data, handle RX data */
1243                 spin_lock(&serial->serial_lock);
1244                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1245                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1246                 spin_unlock(&serial->serial_lock);
1247         } else if (status == -ENOENT || status == -ECONNRESET) {
1248                 /* Unlinked - check for throttled port. */
1249                 D2("Port %d, successfully unlinked urb", serial->minor);
1250                 spin_lock(&serial->serial_lock);
1251                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1252                 hso_resubmit_rx_bulk_urb(serial, urb);
1253                 spin_unlock(&serial->serial_lock);
1254         } else {
1255                 D2("Port %d, status = %d for read urb", serial->minor, status);
1256                 return;
1257         }
1258 }
1259
1260 /*
1261  * This needs to be a tasklet otherwise we will
1262  * end up recursively calling this function.
1263  */
1264 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1265 {
1266         unsigned long flags;
1267
1268         spin_lock_irqsave(&serial->serial_lock, flags);
1269         if ((serial->parent->port_spec & HSO_INTF_MUX))
1270                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1271         else
1272                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1273         spin_unlock_irqrestore(&serial->serial_lock, flags);
1274 }
1275
1276 static  void hso_unthrottle(struct tty_struct *tty)
1277 {
1278         struct hso_serial *serial = get_serial_by_tty(tty);
1279
1280         tasklet_hi_schedule(&serial->unthrottle_tasklet);
1281 }
1282
1283 static void hso_unthrottle_workfunc(struct work_struct *work)
1284 {
1285         struct hso_serial *serial =
1286             container_of(work, struct hso_serial,
1287                          retry_unthrottle_workqueue);
1288         hso_unthrottle_tasklet(serial);
1289 }
1290
1291 /* open the requested serial port */
1292 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1293 {
1294         struct hso_serial *serial = get_serial_by_index(tty->index);
1295         int result;
1296
1297         /* sanity check */
1298         if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1299                 WARN_ON(1);
1300                 tty->driver_data = NULL;
1301                 D1("Failed to open port");
1302                 return -ENODEV;
1303         }
1304
1305         mutex_lock(&serial->parent->mutex);
1306         result = usb_autopm_get_interface(serial->parent->interface);
1307         if (result < 0)
1308                 goto err_out;
1309
1310         D1("Opening %d", serial->minor);
1311         kref_get(&serial->parent->ref);
1312
1313         /* setup */
1314         spin_lock_irq(&serial->serial_lock);
1315         tty->driver_data = serial;
1316         tty_kref_put(serial->tty);
1317         serial->tty = tty_kref_get(tty);
1318         spin_unlock_irq(&serial->serial_lock);
1319
1320         /* check for port already opened, if not set the termios */
1321         serial->open_count++;
1322         if (serial->open_count == 1) {
1323                 serial->rx_state = RX_IDLE;
1324                 /* Force default termio settings */
1325                 _hso_serial_set_termios(tty, NULL);
1326                 tasklet_init(&serial->unthrottle_tasklet,
1327                              (void (*)(unsigned long))hso_unthrottle_tasklet,
1328                              (unsigned long)serial);
1329                 INIT_WORK(&serial->retry_unthrottle_workqueue,
1330                           hso_unthrottle_workfunc);
1331                 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1332                 if (result) {
1333                         hso_stop_serial_device(serial->parent);
1334                         serial->open_count--;
1335                         kref_put(&serial->parent->ref, hso_serial_ref_free);
1336                 }
1337         } else {
1338                 D1("Port was already open");
1339         }
1340
1341         usb_autopm_put_interface(serial->parent->interface);
1342
1343         /* done */
1344         if (result)
1345                 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0);
1346 err_out:
1347         mutex_unlock(&serial->parent->mutex);
1348         return result;
1349 }
1350
1351 /* close the requested serial port */
1352 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1353 {
1354         struct hso_serial *serial = tty->driver_data;
1355         u8 usb_gone;
1356
1357         D1("Closing serial port");
1358
1359         /* Open failed, no close cleanup required */
1360         if (serial == NULL)
1361                 return;
1362
1363         mutex_lock(&serial->parent->mutex);
1364         usb_gone = serial->parent->usb_gone;
1365
1366         if (!usb_gone)
1367                 usb_autopm_get_interface(serial->parent->interface);
1368
1369         /* reset the rts and dtr */
1370         /* do the actual close */
1371         serial->open_count--;
1372
1373         if (serial->open_count <= 0) {
1374                 serial->open_count = 0;
1375                 spin_lock_irq(&serial->serial_lock);
1376                 if (serial->tty == tty) {
1377                         serial->tty->driver_data = NULL;
1378                         serial->tty = NULL;
1379                         tty_kref_put(tty);
1380                 }
1381                 spin_unlock_irq(&serial->serial_lock);
1382                 if (!usb_gone)
1383                         hso_stop_serial_device(serial->parent);
1384                 tasklet_kill(&serial->unthrottle_tasklet);
1385                 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1386         }
1387
1388         if (!usb_gone)
1389                 usb_autopm_put_interface(serial->parent->interface);
1390
1391         mutex_unlock(&serial->parent->mutex);
1392
1393         kref_put(&serial->parent->ref, hso_serial_ref_free);
1394 }
1395
1396 /* close the requested serial port */
1397 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1398                             int count)
1399 {
1400         struct hso_serial *serial = get_serial_by_tty(tty);
1401         int space, tx_bytes;
1402         unsigned long flags;
1403
1404         /* sanity check */
1405         if (serial == NULL) {
1406                 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1407                 return -ENODEV;
1408         }
1409
1410         spin_lock_irqsave(&serial->serial_lock, flags);
1411
1412         space = serial->tx_data_length - serial->tx_buffer_count;
1413         tx_bytes = (count < space) ? count : space;
1414
1415         if (!tx_bytes)
1416                 goto out;
1417
1418         memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1419         serial->tx_buffer_count += tx_bytes;
1420
1421 out:
1422         spin_unlock_irqrestore(&serial->serial_lock, flags);
1423
1424         hso_kick_transmit(serial);
1425         /* done */
1426         return tx_bytes;
1427 }
1428
1429 /* how much room is there for writing */
1430 static int hso_serial_write_room(struct tty_struct *tty)
1431 {
1432         struct hso_serial *serial = get_serial_by_tty(tty);
1433         int room;
1434         unsigned long flags;
1435
1436         spin_lock_irqsave(&serial->serial_lock, flags);
1437         room = serial->tx_data_length - serial->tx_buffer_count;
1438         spin_unlock_irqrestore(&serial->serial_lock, flags);
1439
1440         /* return free room */
1441         return room;
1442 }
1443
1444 /* setup the term */
1445 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1446 {
1447         struct hso_serial *serial = get_serial_by_tty(tty);
1448         unsigned long flags;
1449
1450         if (old)
1451                 D5("Termios called with: cflags new[%d] - old[%d]",
1452                    tty->termios->c_cflag, old->c_cflag);
1453
1454         /* the actual setup */
1455         spin_lock_irqsave(&serial->serial_lock, flags);
1456         if (serial->open_count)
1457                 _hso_serial_set_termios(tty, old);
1458         else
1459                 tty->termios = old;
1460         spin_unlock_irqrestore(&serial->serial_lock, flags);
1461
1462         /* done */
1463 }
1464
1465 /* how many characters in the buffer */
1466 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1467 {
1468         struct hso_serial *serial = get_serial_by_tty(tty);
1469         int chars;
1470         unsigned long flags;
1471
1472         /* sanity check */
1473         if (serial == NULL)
1474                 return 0;
1475
1476         spin_lock_irqsave(&serial->serial_lock, flags);
1477         chars = serial->tx_buffer_count;
1478         spin_unlock_irqrestore(&serial->serial_lock, flags);
1479
1480         return chars;
1481 }
1482 static int tiocmget_submit_urb(struct hso_serial *serial,
1483                                struct hso_tiocmget *tiocmget,
1484                                struct usb_device *usb)
1485 {
1486         int result;
1487
1488         if (serial->parent->usb_gone)
1489                 return -ENODEV;
1490         usb_fill_int_urb(tiocmget->urb, usb,
1491                          usb_rcvintpipe(usb,
1492                                         tiocmget->endp->
1493                                         bEndpointAddress & 0x7F),
1494                          &tiocmget->serial_state_notification,
1495                          sizeof(struct hso_serial_state_notification),
1496                          tiocmget_intr_callback, serial,
1497                          tiocmget->endp->bInterval);
1498         result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1499         if (result) {
1500                 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1501                          result);
1502         }
1503         return result;
1504
1505 }
1506
1507 static void tiocmget_intr_callback(struct urb *urb)
1508 {
1509         struct hso_serial *serial = urb->context;
1510         struct hso_tiocmget *tiocmget;
1511         int status = urb->status;
1512         u16 UART_state_bitmap, prev_UART_state_bitmap;
1513         struct uart_icount *icount;
1514         struct hso_serial_state_notification *serial_state_notification;
1515         struct usb_device *usb;
1516
1517         /* Sanity checks */
1518         if (!serial)
1519                 return;
1520         if (status) {
1521                 handle_usb_error(status, __func__, serial->parent);
1522                 return;
1523         }
1524         tiocmget = serial->tiocmget;
1525         if (!tiocmget)
1526                 return;
1527         usb = serial->parent->usb;
1528         serial_state_notification = &tiocmget->serial_state_notification;
1529         if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1530             serial_state_notification->bNotification != B_NOTIFICATION ||
1531             le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1532             le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1533             le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1534                 dev_warn(&usb->dev,
1535                          "hso received invalid serial state notification\n");
1536                 DUMP(serial_state_notification,
1537                      sizeof(struct hso_serial_state_notification));
1538         } else {
1539
1540                 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1541                                                 UART_state_bitmap);
1542                 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1543                 icount = &tiocmget->icount;
1544                 spin_lock(&serial->serial_lock);
1545                 if ((UART_state_bitmap & B_OVERRUN) !=
1546                    (prev_UART_state_bitmap & B_OVERRUN))
1547                         icount->parity++;
1548                 if ((UART_state_bitmap & B_PARITY) !=
1549                    (prev_UART_state_bitmap & B_PARITY))
1550                         icount->parity++;
1551                 if ((UART_state_bitmap & B_FRAMING) !=
1552                    (prev_UART_state_bitmap & B_FRAMING))
1553                         icount->frame++;
1554                 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1555                    !(prev_UART_state_bitmap & B_RING_SIGNAL))
1556                         icount->rng++;
1557                 if ((UART_state_bitmap & B_BREAK) !=
1558                    (prev_UART_state_bitmap & B_BREAK))
1559                         icount->brk++;
1560                 if ((UART_state_bitmap & B_TX_CARRIER) !=
1561                    (prev_UART_state_bitmap & B_TX_CARRIER))
1562                         icount->dsr++;
1563                 if ((UART_state_bitmap & B_RX_CARRIER) !=
1564                    (prev_UART_state_bitmap & B_RX_CARRIER))
1565                         icount->dcd++;
1566                 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1567                 spin_unlock(&serial->serial_lock);
1568                 tiocmget->intr_completed = 1;
1569                 wake_up_interruptible(&tiocmget->waitq);
1570         }
1571         memset(serial_state_notification, 0,
1572                sizeof(struct hso_serial_state_notification));
1573         tiocmget_submit_urb(serial,
1574                             tiocmget,
1575                             serial->parent->usb);
1576 }
1577
1578 /*
1579  * next few functions largely stolen from drivers/serial/serial_core.c
1580  */
1581 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1582  * - mask passed in arg for lines of interest
1583  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1584  * Caller should use TIOCGICOUNT to see which one it was
1585  */
1586 static int
1587 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1588 {
1589         DECLARE_WAITQUEUE(wait, current);
1590         struct uart_icount cprev, cnow;
1591         struct hso_tiocmget  *tiocmget;
1592         int ret;
1593
1594         tiocmget = serial->tiocmget;
1595         if (!tiocmget)
1596                 return -ENOENT;
1597         /*
1598          * note the counters on entry
1599          */
1600         spin_lock_irq(&serial->serial_lock);
1601         memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1602         spin_unlock_irq(&serial->serial_lock);
1603         add_wait_queue(&tiocmget->waitq, &wait);
1604         for (;;) {
1605                 spin_lock_irq(&serial->serial_lock);
1606                 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1607                 spin_unlock_irq(&serial->serial_lock);
1608                 set_current_state(TASK_INTERRUPTIBLE);
1609                 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1610                     ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1611                     ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd))) {
1612                         ret = 0;
1613                         break;
1614                 }
1615                 schedule();
1616                 /* see if a signal did it */
1617                 if (signal_pending(current)) {
1618                         ret = -ERESTARTSYS;
1619                         break;
1620                 }
1621                 cprev = cnow;
1622         }
1623         current->state = TASK_RUNNING;
1624         remove_wait_queue(&tiocmget->waitq, &wait);
1625
1626         return ret;
1627 }
1628
1629 /*
1630  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1631  * Return: write counters to the user passed counter struct
1632  * NB: both 1->0 and 0->1 transitions are counted except for
1633  *     RI where only 0->1 is counted.
1634  */
1635 static int hso_get_count(struct tty_struct *tty,
1636                   struct serial_icounter_struct *icount)
1637 {
1638         struct uart_icount cnow;
1639         struct hso_serial *serial = get_serial_by_tty(tty);
1640         struct hso_tiocmget  *tiocmget = serial->tiocmget;
1641
1642         memset(&icount, 0, sizeof(struct serial_icounter_struct));
1643
1644         if (!tiocmget)
1645                  return -ENOENT;
1646         spin_lock_irq(&serial->serial_lock);
1647         memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1648         spin_unlock_irq(&serial->serial_lock);
1649
1650         icount->cts         = cnow.cts;
1651         icount->dsr         = cnow.dsr;
1652         icount->rng         = cnow.rng;
1653         icount->dcd         = cnow.dcd;
1654         icount->rx          = cnow.rx;
1655         icount->tx          = cnow.tx;
1656         icount->frame       = cnow.frame;
1657         icount->overrun     = cnow.overrun;
1658         icount->parity      = cnow.parity;
1659         icount->brk         = cnow.brk;
1660         icount->buf_overrun = cnow.buf_overrun;
1661
1662         return 0;
1663 }
1664
1665
1666 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
1667 {
1668         int retval;
1669         struct hso_serial *serial = get_serial_by_tty(tty);
1670         struct hso_tiocmget  *tiocmget;
1671         u16 UART_state_bitmap;
1672
1673         /* sanity check */
1674         if (!serial) {
1675                 D1("no tty structures");
1676                 return -EINVAL;
1677         }
1678         spin_lock_irq(&serial->serial_lock);
1679         retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1680             ((serial->dtr_state) ? TIOCM_DTR : 0);
1681         tiocmget = serial->tiocmget;
1682         if (tiocmget) {
1683
1684                 UART_state_bitmap = le16_to_cpu(
1685                         tiocmget->prev_UART_state_bitmap);
1686                 if (UART_state_bitmap & B_RING_SIGNAL)
1687                         retval |=  TIOCM_RNG;
1688                 if (UART_state_bitmap & B_RX_CARRIER)
1689                         retval |=  TIOCM_CD;
1690                 if (UART_state_bitmap & B_TX_CARRIER)
1691                         retval |=  TIOCM_DSR;
1692         }
1693         spin_unlock_irq(&serial->serial_lock);
1694         return retval;
1695 }
1696
1697 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
1698                                unsigned int set, unsigned int clear)
1699 {
1700         int val = 0;
1701         unsigned long flags;
1702         int if_num;
1703         struct hso_serial *serial = get_serial_by_tty(tty);
1704
1705         /* sanity check */
1706         if (!serial) {
1707                 D1("no tty structures");
1708                 return -EINVAL;
1709         }
1710
1711         if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1712                 return -EINVAL;
1713
1714         if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1715
1716         spin_lock_irqsave(&serial->serial_lock, flags);
1717         if (set & TIOCM_RTS)
1718                 serial->rts_state = 1;
1719         if (set & TIOCM_DTR)
1720                 serial->dtr_state = 1;
1721
1722         if (clear & TIOCM_RTS)
1723                 serial->rts_state = 0;
1724         if (clear & TIOCM_DTR)
1725                 serial->dtr_state = 0;
1726
1727         if (serial->dtr_state)
1728                 val |= 0x01;
1729         if (serial->rts_state)
1730                 val |= 0x02;
1731
1732         spin_unlock_irqrestore(&serial->serial_lock, flags);
1733
1734         return usb_control_msg(serial->parent->usb,
1735                                usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1736                                0x21, val, if_num, NULL, 0,
1737                                USB_CTRL_SET_TIMEOUT);
1738 }
1739
1740 static int hso_serial_ioctl(struct tty_struct *tty, struct file *file,
1741                             unsigned int cmd, unsigned long arg)
1742 {
1743         struct hso_serial *serial =  get_serial_by_tty(tty);
1744         void __user *uarg = (void __user *)arg;
1745         int ret = 0;
1746         D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1747
1748         if (!serial)
1749                 return -ENODEV;
1750         switch (cmd) {
1751         case TIOCMIWAIT:
1752                 ret = hso_wait_modem_status(serial, arg);
1753                 break;
1754         default:
1755                 ret = -ENOIOCTLCMD;
1756                 break;
1757         }
1758         return ret;
1759 }
1760
1761
1762 /* starts a transmit */
1763 static void hso_kick_transmit(struct hso_serial *serial)
1764 {
1765         u8 *temp;
1766         unsigned long flags;
1767         int res;
1768
1769         spin_lock_irqsave(&serial->serial_lock, flags);
1770         if (!serial->tx_buffer_count)
1771                 goto out;
1772
1773         if (serial->tx_urb_used)
1774                 goto out;
1775
1776         /* Wakeup USB interface if necessary */
1777         if (hso_get_activity(serial->parent) == -EAGAIN)
1778                 goto out;
1779
1780         /* Switch pointers around to avoid memcpy */
1781         temp = serial->tx_buffer;
1782         serial->tx_buffer = serial->tx_data;
1783         serial->tx_data = temp;
1784         serial->tx_data_count = serial->tx_buffer_count;
1785         serial->tx_buffer_count = 0;
1786
1787         /* If temp is set, it means we switched buffers */
1788         if (temp && serial->write_data) {
1789                 res = serial->write_data(serial);
1790                 if (res >= 0)
1791                         serial->tx_urb_used = 1;
1792         }
1793 out:
1794         spin_unlock_irqrestore(&serial->serial_lock, flags);
1795 }
1796
1797 /* make a request (for reading and writing data to muxed serial port) */
1798 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1799                               struct urb *ctrl_urb,
1800                               struct usb_ctrlrequest *ctrl_req,
1801                               u8 *ctrl_urb_data, u32 size)
1802 {
1803         int result;
1804         int pipe;
1805
1806         /* Sanity check */
1807         if (!serial || !ctrl_urb || !ctrl_req) {
1808                 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1809                 return -EINVAL;
1810         }
1811
1812         /* initialize */
1813         ctrl_req->wValue = 0;
1814         ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1815         ctrl_req->wLength = cpu_to_le16(size);
1816
1817         if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1818                 /* Reading command */
1819                 ctrl_req->bRequestType = USB_DIR_IN |
1820                                          USB_TYPE_OPTION_VENDOR |
1821                                          USB_RECIP_INTERFACE;
1822                 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1823                 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1824         } else {
1825                 /* Writing command */
1826                 ctrl_req->bRequestType = USB_DIR_OUT |
1827                                          USB_TYPE_OPTION_VENDOR |
1828                                          USB_RECIP_INTERFACE;
1829                 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1830                 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1831         }
1832         /* syslog */
1833         D2("%s command (%02x) len: %d, port: %d",
1834            type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1835            ctrl_req->bRequestType, ctrl_req->wLength, port);
1836
1837         /* Load ctrl urb */
1838         ctrl_urb->transfer_flags = 0;
1839         usb_fill_control_urb(ctrl_urb,
1840                              serial->parent->usb,
1841                              pipe,
1842                              (u8 *) ctrl_req,
1843                              ctrl_urb_data, size, ctrl_callback, serial);
1844         /* Send it on merry way */
1845         result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1846         if (result) {
1847                 dev_err(&ctrl_urb->dev->dev,
1848                         "%s failed submit ctrl_urb %d type %d\n", __func__,
1849                         result, type);
1850                 return result;
1851         }
1852
1853         /* done */
1854         return size;
1855 }
1856
1857 /* called by intr_callback when read occurs */
1858 static int hso_mux_serial_read(struct hso_serial *serial)
1859 {
1860         if (!serial)
1861                 return -EINVAL;
1862
1863         /* clean data */
1864         memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1865         /* make the request */
1866
1867         if (serial->num_rx_urbs != 1) {
1868                 dev_err(&serial->parent->interface->dev,
1869                         "ERROR: mux'd reads with multiple buffers "
1870                         "not possible\n");
1871                 return 0;
1872         }
1873         return mux_device_request(serial,
1874                                   USB_CDC_GET_ENCAPSULATED_RESPONSE,
1875                                   serial->parent->port_spec & HSO_PORT_MASK,
1876                                   serial->rx_urb[0],
1877                                   &serial->ctrl_req_rx,
1878                                   serial->rx_data[0], serial->rx_data_length);
1879 }
1880
1881 /* used for muxed serial port callback (muxed serial read) */
1882 static void intr_callback(struct urb *urb)
1883 {
1884         struct hso_shared_int *shared_int = urb->context;
1885         struct hso_serial *serial;
1886         unsigned char *port_req;
1887         int status = urb->status;
1888         int i;
1889
1890         usb_mark_last_busy(urb->dev);
1891
1892         /* sanity check */
1893         if (!shared_int)
1894                 return;
1895
1896         /* status check */
1897         if (status) {
1898                 handle_usb_error(status, __func__, NULL);
1899                 return;
1900         }
1901         D4("\n--- Got intr callback 0x%02X ---", status);
1902
1903         /* what request? */
1904         port_req = urb->transfer_buffer;
1905         D4(" port_req = 0x%.2X\n", *port_req);
1906         /* loop over all muxed ports to find the one sending this */
1907         for (i = 0; i < 8; i++) {
1908                 /* max 8 channels on MUX */
1909                 if (*port_req & (1 << i)) {
1910                         serial = get_serial_by_shared_int_and_type(shared_int,
1911                                                                    (1 << i));
1912                         if (serial != NULL) {
1913                                 D1("Pending read interrupt on port %d\n", i);
1914                                 spin_lock(&serial->serial_lock);
1915                                 if (serial->rx_state == RX_IDLE &&
1916                                         serial->open_count > 0) {
1917                                         /* Setup and send a ctrl req read on
1918                                          * port i */
1919                                         if (!serial->rx_urb_filled[0]) {
1920                                                 serial->rx_state = RX_SENT;
1921                                                 hso_mux_serial_read(serial);
1922                                         } else
1923                                                 serial->rx_state = RX_PENDING;
1924                                 } else {
1925                                         D1("Already a read pending on "
1926                                            "port %d or port not open\n", i);
1927                                 }
1928                                 spin_unlock(&serial->serial_lock);
1929                         }
1930                 }
1931         }
1932         /* Resubmit interrupt urb */
1933         hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1934 }
1935
1936 /* called for writing to muxed serial port */
1937 static int hso_mux_serial_write_data(struct hso_serial *serial)
1938 {
1939         if (NULL == serial)
1940                 return -EINVAL;
1941
1942         return mux_device_request(serial,
1943                                   USB_CDC_SEND_ENCAPSULATED_COMMAND,
1944                                   serial->parent->port_spec & HSO_PORT_MASK,
1945                                   serial->tx_urb,
1946                                   &serial->ctrl_req_tx,
1947                                   serial->tx_data, serial->tx_data_count);
1948 }
1949
1950 /* write callback for Diag and CS port */
1951 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1952 {
1953         struct hso_serial *serial = urb->context;
1954         int status = urb->status;
1955         struct tty_struct *tty;
1956
1957         /* sanity check */
1958         if (!serial) {
1959                 D1("serial == NULL");
1960                 return;
1961         }
1962
1963         spin_lock(&serial->serial_lock);
1964         serial->tx_urb_used = 0;
1965         tty = tty_kref_get(serial->tty);
1966         spin_unlock(&serial->serial_lock);
1967         if (status) {
1968                 handle_usb_error(status, __func__, serial->parent);
1969                 tty_kref_put(tty);
1970                 return;
1971         }
1972         hso_put_activity(serial->parent);
1973         if (tty) {
1974                 tty_wakeup(tty);
1975                 tty_kref_put(tty);
1976         }
1977         hso_kick_transmit(serial);
1978
1979         D1(" ");
1980 }
1981
1982 /* called for writing diag or CS serial port */
1983 static int hso_std_serial_write_data(struct hso_serial *serial)
1984 {
1985         int count = serial->tx_data_count;
1986         int result;
1987
1988         usb_fill_bulk_urb(serial->tx_urb,
1989                           serial->parent->usb,
1990                           usb_sndbulkpipe(serial->parent->usb,
1991                                           serial->out_endp->
1992                                           bEndpointAddress & 0x7F),
1993                           serial->tx_data, serial->tx_data_count,
1994                           hso_std_serial_write_bulk_callback, serial);
1995
1996         result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1997         if (result) {
1998                 dev_warn(&serial->parent->usb->dev,
1999                          "Failed to submit urb - res %d\n", result);
2000                 return result;
2001         }
2002
2003         return count;
2004 }
2005
2006 /* callback after read or write on muxed serial port */
2007 static void ctrl_callback(struct urb *urb)
2008 {
2009         struct hso_serial *serial = urb->context;
2010         struct usb_ctrlrequest *req;
2011         int status = urb->status;
2012         struct tty_struct *tty;
2013
2014         /* sanity check */
2015         if (!serial)
2016                 return;
2017
2018         spin_lock(&serial->serial_lock);
2019         serial->tx_urb_used = 0;
2020         tty = tty_kref_get(serial->tty);
2021         spin_unlock(&serial->serial_lock);
2022         if (status) {
2023                 handle_usb_error(status, __func__, serial->parent);
2024                 tty_kref_put(tty);
2025                 return;
2026         }
2027
2028         /* what request? */
2029         req = (struct usb_ctrlrequest *)(urb->setup_packet);
2030         D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2031         D4("Actual length of urb = %d\n", urb->actual_length);
2032         DUMP1(urb->transfer_buffer, urb->actual_length);
2033
2034         if (req->bRequestType ==
2035             (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2036                 /* response to a read command */
2037                 serial->rx_urb_filled[0] = 1;
2038                 spin_lock(&serial->serial_lock);
2039                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2040                 spin_unlock(&serial->serial_lock);
2041         } else {
2042                 hso_put_activity(serial->parent);
2043                 if (tty)
2044                         tty_wakeup(tty);
2045                 /* response to a write command */
2046                 hso_kick_transmit(serial);
2047         }
2048         tty_kref_put(tty);
2049 }
2050
2051 /* handle RX data for serial port */
2052 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2053 {
2054         struct tty_struct *tty;
2055         int write_length_remaining = 0;
2056         int curr_write_len;
2057
2058         /* Sanity check */
2059         if (urb == NULL || serial == NULL) {
2060                 D1("serial = NULL");
2061                 return -2;
2062         }
2063
2064         /* All callers to put_rxbuf_data hold serial_lock */
2065         tty = tty_kref_get(serial->tty);
2066
2067         /* Push data to tty */
2068         if (tty) {
2069                 write_length_remaining = urb->actual_length -
2070                         serial->curr_rx_urb_offset;
2071                 D1("data to push to tty");
2072                 while (write_length_remaining) {
2073                         if (test_bit(TTY_THROTTLED, &tty->flags)) {
2074                                 tty_kref_put(tty);
2075                                 return -1;
2076                         }
2077                         curr_write_len =  tty_insert_flip_string
2078                                 (tty, urb->transfer_buffer +
2079                                  serial->curr_rx_urb_offset,
2080                                  write_length_remaining);
2081                         serial->curr_rx_urb_offset += curr_write_len;
2082                         write_length_remaining -= curr_write_len;
2083                         tty_flip_buffer_push(tty);
2084                 }
2085         }
2086         if (write_length_remaining == 0) {
2087                 serial->curr_rx_urb_offset = 0;
2088                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2089         }
2090         tty_kref_put(tty);
2091         return write_length_remaining;
2092 }
2093
2094
2095 /* Base driver functions */
2096
2097 static void hso_log_port(struct hso_device *hso_dev)
2098 {
2099         char *port_type;
2100         char port_dev[20];
2101
2102         switch (hso_dev->port_spec & HSO_PORT_MASK) {
2103         case HSO_PORT_CONTROL:
2104                 port_type = "Control";
2105                 break;
2106         case HSO_PORT_APP:
2107                 port_type = "Application";
2108                 break;
2109         case HSO_PORT_GPS:
2110                 port_type = "GPS";
2111                 break;
2112         case HSO_PORT_GPS_CONTROL:
2113                 port_type = "GPS control";
2114                 break;
2115         case HSO_PORT_APP2:
2116                 port_type = "Application2";
2117                 break;
2118         case HSO_PORT_PCSC:
2119                 port_type = "PCSC";
2120                 break;
2121         case HSO_PORT_DIAG:
2122                 port_type = "Diagnostic";
2123                 break;
2124         case HSO_PORT_DIAG2:
2125                 port_type = "Diagnostic2";
2126                 break;
2127         case HSO_PORT_MODEM:
2128                 port_type = "Modem";
2129                 break;
2130         case HSO_PORT_NETWORK:
2131                 port_type = "Network";
2132                 break;
2133         default:
2134                 port_type = "Unknown";
2135                 break;
2136         }
2137         if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2138                 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2139         } else
2140                 sprintf(port_dev, "/dev/%s%d", tty_filename,
2141                         dev2ser(hso_dev)->minor);
2142
2143         dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2144                 port_type, port_dev);
2145 }
2146
2147 static int hso_start_net_device(struct hso_device *hso_dev)
2148 {
2149         int i, result = 0;
2150         struct hso_net *hso_net = dev2net(hso_dev);
2151
2152         if (!hso_net)
2153                 return -ENODEV;
2154
2155         /* send URBs for all read buffers */
2156         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2157
2158                 /* Prep a receive URB */
2159                 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2160                                   hso_dev->usb,
2161                                   usb_rcvbulkpipe(hso_dev->usb,
2162                                                   hso_net->in_endp->
2163                                                   bEndpointAddress & 0x7F),
2164                                   hso_net->mux_bulk_rx_buf_pool[i],
2165                                   MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2166                                   hso_net);
2167
2168                 /* Put it out there so the device can send us stuff */
2169                 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2170                                         GFP_NOIO);
2171                 if (result)
2172                         dev_warn(&hso_dev->usb->dev,
2173                                 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2174                                 i, result);
2175         }
2176
2177         return result;
2178 }
2179
2180 static int hso_stop_net_device(struct hso_device *hso_dev)
2181 {
2182         int i;
2183         struct hso_net *hso_net = dev2net(hso_dev);
2184
2185         if (!hso_net)
2186                 return -ENODEV;
2187
2188         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2189                 if (hso_net->mux_bulk_rx_urb_pool[i])
2190                         usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2191
2192         }
2193         if (hso_net->mux_bulk_tx_urb)
2194                 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2195
2196         return 0;
2197 }
2198
2199 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2200 {
2201         int i, result = 0;
2202         struct hso_serial *serial = dev2ser(hso_dev);
2203
2204         if (!serial)
2205                 return -ENODEV;
2206
2207         /* If it is not the MUX port fill in and submit a bulk urb (already
2208          * allocated in hso_serial_start) */
2209         if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2210                 for (i = 0; i < serial->num_rx_urbs; i++) {
2211                         usb_fill_bulk_urb(serial->rx_urb[i],
2212                                           serial->parent->usb,
2213                                           usb_rcvbulkpipe(serial->parent->usb,
2214                                                           serial->in_endp->
2215                                                           bEndpointAddress &
2216                                                           0x7F),
2217                                           serial->rx_data[i],
2218                                           serial->rx_data_length,
2219                                           hso_std_serial_read_bulk_callback,
2220                                           serial);
2221                         result = usb_submit_urb(serial->rx_urb[i], flags);
2222                         if (result) {
2223                                 dev_warn(&serial->parent->usb->dev,
2224                                          "Failed to submit urb - res %d\n",
2225                                          result);
2226                                 break;
2227                         }
2228                 }
2229         } else {
2230                 mutex_lock(&serial->shared_int->shared_int_lock);
2231                 if (!serial->shared_int->use_count) {
2232                         result =
2233                             hso_mux_submit_intr_urb(serial->shared_int,
2234                                                     hso_dev->usb, flags);
2235                 }
2236                 serial->shared_int->use_count++;
2237                 mutex_unlock(&serial->shared_int->shared_int_lock);
2238         }
2239         if (serial->tiocmget)
2240                 tiocmget_submit_urb(serial,
2241                                     serial->tiocmget,
2242                                     serial->parent->usb);
2243         return result;
2244 }
2245
2246 static int hso_stop_serial_device(struct hso_device *hso_dev)
2247 {
2248         int i;
2249         struct hso_serial *serial = dev2ser(hso_dev);
2250         struct hso_tiocmget  *tiocmget;
2251
2252         if (!serial)
2253                 return -ENODEV;
2254
2255         for (i = 0; i < serial->num_rx_urbs; i++) {
2256                 if (serial->rx_urb[i]) {
2257                                 usb_kill_urb(serial->rx_urb[i]);
2258                                 serial->rx_urb_filled[i] = 0;
2259                 }
2260         }
2261         serial->curr_rx_urb_idx = 0;
2262         serial->curr_rx_urb_offset = 0;
2263
2264         if (serial->tx_urb)
2265                 usb_kill_urb(serial->tx_urb);
2266
2267         if (serial->shared_int) {
2268                 mutex_lock(&serial->shared_int->shared_int_lock);
2269                 if (serial->shared_int->use_count &&
2270                     (--serial->shared_int->use_count == 0)) {
2271                         struct urb *urb;
2272
2273                         urb = serial->shared_int->shared_intr_urb;
2274                         if (urb)
2275                                 usb_kill_urb(urb);
2276                 }
2277                 mutex_unlock(&serial->shared_int->shared_int_lock);
2278         }
2279         tiocmget = serial->tiocmget;
2280         if (tiocmget) {
2281                 wake_up_interruptible(&tiocmget->waitq);
2282                 usb_kill_urb(tiocmget->urb);
2283         }
2284
2285         return 0;
2286 }
2287
2288 static void hso_serial_common_free(struct hso_serial *serial)
2289 {
2290         int i;
2291
2292         if (serial->parent->dev)
2293                 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2294
2295         tty_unregister_device(tty_drv, serial->minor);
2296
2297         for (i = 0; i < serial->num_rx_urbs; i++) {
2298                 /* unlink and free RX URB */
2299                 usb_free_urb(serial->rx_urb[i]);
2300                 /* free the RX buffer */
2301                 kfree(serial->rx_data[i]);
2302         }
2303
2304         /* unlink and free TX URB */
2305         usb_free_urb(serial->tx_urb);
2306         kfree(serial->tx_data);
2307 }
2308
2309 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2310                                     int rx_size, int tx_size)
2311 {
2312         struct device *dev;
2313         int minor;
2314         int i;
2315
2316         minor = get_free_serial_index();
2317         if (minor < 0)
2318                 goto exit;
2319
2320         /* register our minor number */
2321         serial->parent->dev = tty_register_device(tty_drv, minor,
2322                                         &serial->parent->interface->dev);
2323         dev = serial->parent->dev;
2324         dev_set_drvdata(dev, serial->parent);
2325         i = device_create_file(dev, &dev_attr_hsotype);
2326
2327         /* fill in specific data for later use */
2328         serial->minor = minor;
2329         serial->magic = HSO_SERIAL_MAGIC;
2330         spin_lock_init(&serial->serial_lock);
2331         serial->num_rx_urbs = num_urbs;
2332
2333         /* RX, allocate urb and initialize */
2334
2335         /* prepare our RX buffer */
2336         serial->rx_data_length = rx_size;
2337         for (i = 0; i < serial->num_rx_urbs; i++) {
2338                 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2339                 if (!serial->rx_urb[i]) {
2340                         dev_err(dev, "Could not allocate urb?\n");
2341                         goto exit;
2342                 }
2343                 serial->rx_urb[i]->transfer_buffer = NULL;
2344                 serial->rx_urb[i]->transfer_buffer_length = 0;
2345                 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2346                                              GFP_KERNEL);
2347                 if (!serial->rx_data[i]) {
2348                         dev_err(dev, "%s - Out of memory\n", __func__);
2349                         goto exit;
2350                 }
2351         }
2352
2353         /* TX, allocate urb and initialize */
2354         serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2355         if (!serial->tx_urb) {
2356                 dev_err(dev, "Could not allocate urb?\n");
2357                 goto exit;
2358         }
2359         serial->tx_urb->transfer_buffer = NULL;
2360         serial->tx_urb->transfer_buffer_length = 0;
2361         /* prepare our TX buffer */
2362         serial->tx_data_count = 0;
2363         serial->tx_buffer_count = 0;
2364         serial->tx_data_length = tx_size;
2365         serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2366         if (!serial->tx_data) {
2367                 dev_err(dev, "%s - Out of memory\n", __func__);
2368                 goto exit;
2369         }
2370         serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2371         if (!serial->tx_buffer) {
2372                 dev_err(dev, "%s - Out of memory\n", __func__);
2373                 goto exit;
2374         }
2375
2376         return 0;
2377 exit:
2378         hso_serial_common_free(serial);
2379         return -1;
2380 }
2381
2382 /* Creates a general hso device */
2383 static struct hso_device *hso_create_device(struct usb_interface *intf,
2384                                             int port_spec)
2385 {
2386         struct hso_device *hso_dev;
2387
2388         hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2389         if (!hso_dev)
2390                 return NULL;
2391
2392         hso_dev->port_spec = port_spec;
2393         hso_dev->usb = interface_to_usbdev(intf);
2394         hso_dev->interface = intf;
2395         kref_init(&hso_dev->ref);
2396         mutex_init(&hso_dev->mutex);
2397
2398         INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2399         INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2400         INIT_WORK(&hso_dev->reset_device, reset_device);
2401
2402         return hso_dev;
2403 }
2404
2405 /* Removes a network device in the network device table */
2406 static int remove_net_device(struct hso_device *hso_dev)
2407 {
2408         int i;
2409
2410         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2411                 if (network_table[i] == hso_dev) {
2412                         network_table[i] = NULL;
2413                         break;
2414                 }
2415         }
2416         if (i == HSO_MAX_NET_DEVICES)
2417                 return -1;
2418         return 0;
2419 }
2420
2421 /* Frees our network device */
2422 static void hso_free_net_device(struct hso_device *hso_dev)
2423 {
2424         int i;
2425         struct hso_net *hso_net = dev2net(hso_dev);
2426
2427         if (!hso_net)
2428                 return;
2429
2430         remove_net_device(hso_net->parent);
2431
2432         if (hso_net->net) {
2433                 unregister_netdev(hso_net->net);
2434                 free_netdev(hso_net->net);
2435         }
2436
2437         /* start freeing */
2438         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2439                 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2440                 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2441                 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2442         }
2443         usb_free_urb(hso_net->mux_bulk_tx_urb);
2444         kfree(hso_net->mux_bulk_tx_buf);
2445         hso_net->mux_bulk_tx_buf = NULL;
2446
2447         kfree(hso_dev);
2448 }
2449
2450 static const struct net_device_ops hso_netdev_ops = {
2451         .ndo_open       = hso_net_open,
2452         .ndo_stop       = hso_net_close,
2453         .ndo_start_xmit = hso_net_start_xmit,
2454         .ndo_tx_timeout = hso_net_tx_timeout,
2455 };
2456
2457 /* initialize the network interface */
2458 static void hso_net_init(struct net_device *net)
2459 {
2460         struct hso_net *hso_net = netdev_priv(net);
2461
2462         D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2463
2464         /* fill in the other fields */
2465         net->netdev_ops = &hso_netdev_ops;
2466         net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2467         net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2468         net->type = ARPHRD_NONE;
2469         net->mtu = DEFAULT_MTU - 14;
2470         net->tx_queue_len = 10;
2471         SET_ETHTOOL_OPS(net, &ops);
2472
2473         /* and initialize the semaphore */
2474         spin_lock_init(&hso_net->net_lock);
2475 }
2476
2477 /* Adds a network device in the network device table */
2478 static int add_net_device(struct hso_device *hso_dev)
2479 {
2480         int i;
2481
2482         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2483                 if (network_table[i] == NULL) {
2484                         network_table[i] = hso_dev;
2485                         break;
2486                 }
2487         }
2488         if (i == HSO_MAX_NET_DEVICES)
2489                 return -1;
2490         return 0;
2491 }
2492
2493 static int hso_rfkill_set_block(void *data, bool blocked)
2494 {
2495         struct hso_device *hso_dev = data;
2496         int enabled = !blocked;
2497         int rv;
2498
2499         mutex_lock(&hso_dev->mutex);
2500         if (hso_dev->usb_gone)
2501                 rv = 0;
2502         else
2503                 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2504                                        enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2505                                        USB_CTRL_SET_TIMEOUT);
2506         mutex_unlock(&hso_dev->mutex);
2507         return rv;
2508 }
2509
2510 static const struct rfkill_ops hso_rfkill_ops = {
2511         .set_block = hso_rfkill_set_block,
2512 };
2513
2514 /* Creates and sets up everything for rfkill */
2515 static void hso_create_rfkill(struct hso_device *hso_dev,
2516                              struct usb_interface *interface)
2517 {
2518         struct hso_net *hso_net = dev2net(hso_dev);
2519         struct device *dev = &hso_net->net->dev;
2520         char *rfkn;
2521
2522         rfkn = kzalloc(20, GFP_KERNEL);
2523         if (!rfkn)
2524                 dev_err(dev, "%s - Out of memory\n", __func__);
2525
2526         snprintf(rfkn, 20, "hso-%d",
2527                  interface->altsetting->desc.bInterfaceNumber);
2528
2529         hso_net->rfkill = rfkill_alloc(rfkn,
2530                                        &interface_to_usbdev(interface)->dev,
2531                                        RFKILL_TYPE_WWAN,
2532                                        &hso_rfkill_ops, hso_dev);
2533         if (!hso_net->rfkill) {
2534                 dev_err(dev, "%s - Out of memory\n", __func__);
2535                 kfree(rfkn);
2536                 return;
2537         }
2538         if (rfkill_register(hso_net->rfkill) < 0) {
2539                 rfkill_destroy(hso_net->rfkill);
2540                 kfree(rfkn);
2541                 hso_net->rfkill = NULL;
2542                 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2543                 return;
2544         }
2545 }
2546
2547 static struct device_type hso_type = {
2548         .name   = "wwan",
2549 };
2550
2551 /* Creates our network device */
2552 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2553                                                 int port_spec)
2554 {
2555         int result, i;
2556         struct net_device *net;
2557         struct hso_net *hso_net;
2558         struct hso_device *hso_dev;
2559
2560         hso_dev = hso_create_device(interface, port_spec);
2561         if (!hso_dev)
2562                 return NULL;
2563
2564         /* allocate our network device, then we can put in our private data */
2565         /* call hso_net_init to do the basic initialization */
2566         net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2567         if (!net) {
2568                 dev_err(&interface->dev, "Unable to create ethernet device\n");
2569                 goto exit;
2570         }
2571
2572         hso_net = netdev_priv(net);
2573
2574         hso_dev->port_data.dev_net = hso_net;
2575         hso_net->net = net;
2576         hso_net->parent = hso_dev;
2577
2578         hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2579                                       USB_DIR_IN);
2580         if (!hso_net->in_endp) {
2581                 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2582                 goto exit;
2583         }
2584         hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2585                                        USB_DIR_OUT);
2586         if (!hso_net->out_endp) {
2587                 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2588                 goto exit;
2589         }
2590         SET_NETDEV_DEV(net, &interface->dev);
2591         SET_NETDEV_DEVTYPE(net, &hso_type);
2592
2593         /* registering our net device */
2594         result = register_netdev(net);
2595         if (result) {
2596                 dev_err(&interface->dev, "Failed to register device\n");
2597                 goto exit;
2598         }
2599
2600         /* start allocating */
2601         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2602                 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2603                 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2604                         dev_err(&interface->dev, "Could not allocate rx urb\n");
2605                         goto exit;
2606                 }
2607                 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2608                                                            GFP_KERNEL);
2609                 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2610                         dev_err(&interface->dev, "Could not allocate rx buf\n");
2611                         goto exit;
2612                 }
2613         }
2614         hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2615         if (!hso_net->mux_bulk_tx_urb) {
2616                 dev_err(&interface->dev, "Could not allocate tx urb\n");
2617                 goto exit;
2618         }
2619         hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2620         if (!hso_net->mux_bulk_tx_buf) {
2621                 dev_err(&interface->dev, "Could not allocate tx buf\n");
2622                 goto exit;
2623         }
2624
2625         add_net_device(hso_dev);
2626
2627         hso_log_port(hso_dev);
2628
2629         hso_create_rfkill(hso_dev, interface);
2630
2631         return hso_dev;
2632 exit:
2633         hso_free_net_device(hso_dev);
2634         return NULL;
2635 }
2636
2637 static void hso_free_tiomget(struct hso_serial *serial)
2638 {
2639         struct hso_tiocmget *tiocmget = serial->tiocmget;
2640         if (tiocmget) {
2641                 if (tiocmget->urb) {
2642                         usb_free_urb(tiocmget->urb);
2643                         tiocmget->urb = NULL;
2644                 }
2645                 serial->tiocmget = NULL;
2646                 kfree(tiocmget);
2647
2648         }
2649 }
2650
2651 /* Frees an AT channel ( goes for both mux and non-mux ) */
2652 static void hso_free_serial_device(struct hso_device *hso_dev)
2653 {
2654         struct hso_serial *serial = dev2ser(hso_dev);
2655
2656         if (!serial)
2657                 return;
2658         set_serial_by_index(serial->minor, NULL);
2659
2660         hso_serial_common_free(serial);
2661
2662         if (serial->shared_int) {
2663                 mutex_lock(&serial->shared_int->shared_int_lock);
2664                 if (--serial->shared_int->ref_count == 0)
2665                         hso_free_shared_int(serial->shared_int);
2666                 else
2667                         mutex_unlock(&serial->shared_int->shared_int_lock);
2668         }
2669         hso_free_tiomget(serial);
2670         kfree(serial);
2671         kfree(hso_dev);
2672 }
2673
2674 /* Creates a bulk AT channel */
2675 static struct hso_device *hso_create_bulk_serial_device(
2676                         struct usb_interface *interface, int port)
2677 {
2678         struct hso_device *hso_dev;
2679         struct hso_serial *serial;
2680         int num_urbs;
2681         struct hso_tiocmget *tiocmget;
2682
2683         hso_dev = hso_create_device(interface, port);
2684         if (!hso_dev)
2685                 return NULL;
2686
2687         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2688         if (!serial)
2689                 goto exit;
2690
2691         serial->parent = hso_dev;
2692         hso_dev->port_data.dev_serial = serial;
2693
2694         if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2695                 num_urbs = 2;
2696                 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2697                                            GFP_KERNEL);
2698                 /* it isn't going to break our heart if serial->tiocmget
2699                  *  allocation fails don't bother checking this.
2700                  */
2701                 if (serial->tiocmget) {
2702                         tiocmget = serial->tiocmget;
2703                         tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2704                         if (tiocmget->urb) {
2705                                 mutex_init(&tiocmget->mutex);
2706                                 init_waitqueue_head(&tiocmget->waitq);
2707                                 tiocmget->endp = hso_get_ep(
2708                                         interface,
2709                                         USB_ENDPOINT_XFER_INT,
2710                                         USB_DIR_IN);
2711                         } else
2712                                 hso_free_tiomget(serial);
2713                 }
2714         }
2715         else
2716                 num_urbs = 1;
2717
2718         if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2719                                      BULK_URB_TX_SIZE))
2720                 goto exit;
2721
2722         serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2723                                      USB_DIR_IN);
2724         if (!serial->in_endp) {
2725                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2726                 goto exit2;
2727         }
2728
2729         if (!
2730             (serial->out_endp =
2731              hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2732                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2733                 goto exit2;
2734         }
2735
2736         serial->write_data = hso_std_serial_write_data;
2737
2738         /* and record this serial */
2739         set_serial_by_index(serial->minor, serial);
2740
2741         /* setup the proc dirs and files if needed */
2742         hso_log_port(hso_dev);
2743
2744         /* done, return it */
2745         return hso_dev;
2746
2747 exit2:
2748         hso_serial_common_free(serial);
2749 exit:
2750         hso_free_tiomget(serial);
2751         kfree(serial);
2752         kfree(hso_dev);
2753         return NULL;
2754 }
2755
2756 /* Creates a multiplexed AT channel */
2757 static
2758 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2759                                                 int port,
2760                                                 struct hso_shared_int *mux)
2761 {
2762         struct hso_device *hso_dev;
2763         struct hso_serial *serial;
2764         int port_spec;
2765
2766         port_spec = HSO_INTF_MUX;
2767         port_spec &= ~HSO_PORT_MASK;
2768
2769         port_spec |= hso_mux_to_port(port);
2770         if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2771                 return NULL;
2772
2773         hso_dev = hso_create_device(interface, port_spec);
2774         if (!hso_dev)
2775                 return NULL;
2776
2777         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2778         if (!serial)
2779                 goto exit;
2780
2781         hso_dev->port_data.dev_serial = serial;
2782         serial->parent = hso_dev;
2783
2784         if (hso_serial_common_create
2785             (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2786                 goto exit;
2787
2788         serial->tx_data_length--;
2789         serial->write_data = hso_mux_serial_write_data;
2790
2791         serial->shared_int = mux;
2792         mutex_lock(&serial->shared_int->shared_int_lock);
2793         serial->shared_int->ref_count++;
2794         mutex_unlock(&serial->shared_int->shared_int_lock);
2795
2796         /* and record this serial */
2797         set_serial_by_index(serial->minor, serial);
2798
2799         /* setup the proc dirs and files if needed */
2800         hso_log_port(hso_dev);
2801
2802         /* done, return it */
2803         return hso_dev;
2804
2805 exit:
2806         if (serial) {
2807                 tty_unregister_device(tty_drv, serial->minor);
2808                 kfree(serial);
2809         }
2810         if (hso_dev)
2811                 kfree(hso_dev);
2812         return NULL;
2813
2814 }
2815
2816 static void hso_free_shared_int(struct hso_shared_int *mux)
2817 {
2818         usb_free_urb(mux->shared_intr_urb);
2819         kfree(mux->shared_intr_buf);
2820         mutex_unlock(&mux->shared_int_lock);
2821         kfree(mux);
2822 }
2823
2824 static
2825 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2826 {
2827         struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2828
2829         if (!mux)
2830                 return NULL;
2831
2832         mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2833                                     USB_DIR_IN);
2834         if (!mux->intr_endp) {
2835                 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2836                 goto exit;
2837         }
2838
2839         mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2840         if (!mux->shared_intr_urb) {
2841                 dev_err(&interface->dev, "Could not allocate intr urb?\n");
2842                 goto exit;
2843         }
2844         mux->shared_intr_buf =
2845                 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2846                         GFP_KERNEL);
2847         if (!mux->shared_intr_buf) {
2848                 dev_err(&interface->dev, "Could not allocate intr buf?\n");
2849                 goto exit;
2850         }
2851
2852         mutex_init(&mux->shared_int_lock);
2853
2854         return mux;
2855
2856 exit:
2857         kfree(mux->shared_intr_buf);
2858         usb_free_urb(mux->shared_intr_urb);
2859         kfree(mux);
2860         return NULL;
2861 }
2862
2863 /* Gets the port spec for a certain interface */
2864 static int hso_get_config_data(struct usb_interface *interface)
2865 {
2866         struct usb_device *usbdev = interface_to_usbdev(interface);
2867         u8 config_data[17];
2868         u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2869         s32 result;
2870
2871         if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2872                             0x86, 0xC0, 0, 0, config_data, 17,
2873                             USB_CTRL_SET_TIMEOUT) != 0x11) {
2874                 return -EIO;
2875         }
2876
2877         switch (config_data[if_num]) {
2878         case 0x0:
2879                 result = 0;
2880                 break;
2881         case 0x1:
2882                 result = HSO_PORT_DIAG;
2883                 break;
2884         case 0x2:
2885                 result = HSO_PORT_GPS;
2886                 break;
2887         case 0x3:
2888                 result = HSO_PORT_GPS_CONTROL;
2889                 break;
2890         case 0x4:
2891                 result = HSO_PORT_APP;
2892                 break;
2893         case 0x5:
2894                 result = HSO_PORT_APP2;
2895                 break;
2896         case 0x6:
2897                 result = HSO_PORT_CONTROL;
2898                 break;
2899         case 0x7:
2900                 result = HSO_PORT_NETWORK;
2901                 break;
2902         case 0x8:
2903                 result = HSO_PORT_MODEM;
2904                 break;
2905         case 0x9:
2906                 result = HSO_PORT_MSD;
2907                 break;
2908         case 0xa:
2909                 result = HSO_PORT_PCSC;
2910                 break;
2911         case 0xb:
2912                 result = HSO_PORT_VOICE;
2913                 break;
2914         default:
2915                 result = 0;
2916         }
2917
2918         if (result)
2919                 result |= HSO_INTF_BULK;
2920
2921         if (config_data[16] & 0x1)
2922                 result |= HSO_INFO_CRC_BUG;
2923
2924         return result;
2925 }
2926
2927 /* called once for each interface upon device insertion */
2928 static int hso_probe(struct usb_interface *interface,
2929                      const struct usb_device_id *id)
2930 {
2931         int mux, i, if_num, port_spec;
2932         unsigned char port_mask;
2933         struct hso_device *hso_dev = NULL;
2934         struct hso_shared_int *shared_int;
2935         struct hso_device *tmp_dev = NULL;
2936
2937         if_num = interface->altsetting->desc.bInterfaceNumber;
2938
2939         /* Get the interface/port specification from either driver_info or from
2940          * the device itself */
2941         if (id->driver_info)
2942                 port_spec = ((u32 *)(id->driver_info))[if_num];
2943         else
2944                 port_spec = hso_get_config_data(interface);
2945
2946         if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2947                 dev_err(&interface->dev, "Not our interface\n");
2948                 return -ENODEV;
2949         }
2950         /* Check if we need to switch to alt interfaces prior to port
2951          * configuration */
2952         if (interface->num_altsetting > 1)
2953                 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2954         interface->needs_remote_wakeup = 1;
2955
2956         /* Allocate new hso device(s) */
2957         switch (port_spec & HSO_INTF_MASK) {
2958         case HSO_INTF_MUX:
2959                 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2960                         /* Create the network device */
2961                         if (!disable_net) {
2962                                 hso_dev = hso_create_net_device(interface,
2963                                                                 port_spec);
2964                                 if (!hso_dev)
2965                                         goto exit;
2966                                 tmp_dev = hso_dev;
2967                         }
2968                 }
2969
2970                 if (hso_get_mux_ports(interface, &port_mask))
2971                         /* TODO: de-allocate everything */
2972                         goto exit;
2973
2974                 shared_int = hso_create_shared_int(interface);
2975                 if (!shared_int)
2976                         goto exit;
2977
2978                 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2979                         if (port_mask & i) {
2980                                 hso_dev = hso_create_mux_serial_device(
2981                                                 interface, i, shared_int);
2982                                 if (!hso_dev)
2983                                         goto exit;
2984                         }
2985                 }
2986
2987                 if (tmp_dev)
2988                         hso_dev = tmp_dev;
2989                 break;
2990
2991         case HSO_INTF_BULK:
2992                 /* It's a regular bulk interface */
2993                 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2994                         if (!disable_net)
2995                                 hso_dev =
2996                                     hso_create_net_device(interface, port_spec);
2997                 } else {
2998                         hso_dev =
2999                             hso_create_bulk_serial_device(interface, port_spec);
3000                 }
3001                 if (!hso_dev)
3002                         goto exit;
3003                 break;
3004         default:
3005                 goto exit;
3006         }
3007
3008         /* save our data pointer in this device */
3009         usb_set_intfdata(interface, hso_dev);
3010
3011         /* done */
3012         return 0;
3013 exit:
3014         hso_free_interface(interface);
3015         return -ENODEV;
3016 }
3017
3018 /* device removed, cleaning up */
3019 static void hso_disconnect(struct usb_interface *interface)
3020 {
3021         hso_free_interface(interface);
3022
3023         /* remove reference of our private data */
3024         usb_set_intfdata(interface, NULL);
3025 }
3026
3027 static void async_get_intf(struct work_struct *data)
3028 {
3029         struct hso_device *hso_dev =
3030             container_of(data, struct hso_device, async_get_intf);
3031         usb_autopm_get_interface(hso_dev->interface);
3032 }
3033
3034 static void async_put_intf(struct work_struct *data)
3035 {
3036         struct hso_device *hso_dev =
3037             container_of(data, struct hso_device, async_put_intf);
3038         usb_autopm_put_interface(hso_dev->interface);
3039 }
3040
3041 static int hso_get_activity(struct hso_device *hso_dev)
3042 {
3043         if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3044                 if (!hso_dev->is_active) {
3045                         hso_dev->is_active = 1;
3046                         schedule_work(&hso_dev->async_get_intf);
3047                 }
3048         }
3049
3050         if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3051                 return -EAGAIN;
3052
3053         usb_mark_last_busy(hso_dev->usb);
3054
3055         return 0;
3056 }
3057
3058 static int hso_put_activity(struct hso_device *hso_dev)
3059 {
3060         if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3061                 if (hso_dev->is_active) {
3062                         hso_dev->is_active = 0;
3063                         schedule_work(&hso_dev->async_put_intf);
3064                         return -EAGAIN;
3065                 }
3066         }
3067         hso_dev->is_active = 0;
3068         return 0;
3069 }
3070
3071 /* called by kernel when we need to suspend device */
3072 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3073 {
3074         int i, result;
3075
3076         /* Stop all serial ports */
3077         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3078                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3079                         result = hso_stop_serial_device(serial_table[i]);
3080                         if (result)
3081                                 goto out;
3082                 }
3083         }
3084
3085         /* Stop all network ports */
3086         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3087                 if (network_table[i] &&
3088                     (network_table[i]->interface == iface)) {
3089                         result = hso_stop_net_device(network_table[i]);
3090                         if (result)
3091                                 goto out;
3092                 }
3093         }
3094
3095 out:
3096         return 0;
3097 }
3098
3099 /* called by kernel when we need to resume device */
3100 static int hso_resume(struct usb_interface *iface)
3101 {
3102         int i, result = 0;
3103         struct hso_net *hso_net;
3104
3105         /* Start all serial ports */
3106         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3107                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3108                         if (dev2ser(serial_table[i])->open_count) {
3109                                 result =
3110                                     hso_start_serial_device(serial_table[i], GFP_NOIO);
3111                                 hso_kick_transmit(dev2ser(serial_table[i]));
3112                                 if (result)
3113                                         goto out;
3114                         }
3115                 }
3116         }
3117
3118         /* Start all network ports */
3119         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3120                 if (network_table[i] &&
3121                     (network_table[i]->interface == iface)) {
3122                         hso_net = dev2net(network_table[i]);
3123                         if (hso_net->flags & IFF_UP) {
3124                                 /* First transmit any lingering data,
3125                                    then restart the device. */
3126                                 if (hso_net->skb_tx_buf) {
3127                                         dev_dbg(&iface->dev,
3128                                                 "Transmitting"
3129                                                 " lingering data\n");
3130                                         hso_net_start_xmit(hso_net->skb_tx_buf,
3131                                                            hso_net->net);
3132                                         hso_net->skb_tx_buf = NULL;
3133                                 }
3134                                 result = hso_start_net_device(network_table[i]);
3135                                 if (result)
3136                                         goto out;
3137                         }
3138                 }
3139         }
3140
3141 out:
3142         return result;
3143 }
3144
3145 static void reset_device(struct work_struct *data)
3146 {
3147         struct hso_device *hso_dev =
3148             container_of(data, struct hso_device, reset_device);
3149         struct usb_device *usb = hso_dev->usb;
3150         int result;
3151
3152         if (hso_dev->usb_gone) {
3153                 D1("No reset during disconnect\n");
3154         } else {
3155                 result = usb_lock_device_for_reset(usb, hso_dev->interface);
3156                 if (result < 0)
3157                         D1("unable to lock device for reset: %d\n", result);
3158                 else {
3159                         usb_reset_device(usb);
3160                         usb_unlock_device(usb);
3161                 }
3162         }
3163 }
3164
3165 static void hso_serial_ref_free(struct kref *ref)
3166 {
3167         struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3168
3169         hso_free_serial_device(hso_dev);
3170 }
3171
3172 static void hso_free_interface(struct usb_interface *interface)
3173 {
3174         struct hso_serial *hso_dev;
3175         struct tty_struct *tty;
3176         int i;
3177
3178         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3179                 if (serial_table[i] &&
3180                     (serial_table[i]->interface == interface)) {
3181                         hso_dev = dev2ser(serial_table[i]);
3182                         spin_lock_irq(&hso_dev->serial_lock);
3183                         tty = tty_kref_get(hso_dev->tty);
3184                         spin_unlock_irq(&hso_dev->serial_lock);
3185                         if (tty)
3186                                 tty_hangup(tty);
3187                         mutex_lock(&hso_dev->parent->mutex);
3188                         tty_kref_put(tty);
3189                         hso_dev->parent->usb_gone = 1;
3190                         mutex_unlock(&hso_dev->parent->mutex);
3191                         kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3192                 }
3193         }
3194
3195         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3196                 if (network_table[i] &&
3197                     (network_table[i]->interface == interface)) {
3198                         struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3199                         /* hso_stop_net_device doesn't stop the net queue since
3200                          * traffic needs to start it again when suspended */
3201                         netif_stop_queue(dev2net(network_table[i])->net);
3202                         hso_stop_net_device(network_table[i]);
3203                         cancel_work_sync(&network_table[i]->async_put_intf);
3204                         cancel_work_sync(&network_table[i]->async_get_intf);
3205                         if (rfk) {
3206                                 rfkill_unregister(rfk);
3207                                 rfkill_destroy(rfk);
3208                         }
3209                         hso_free_net_device(network_table[i]);
3210                 }
3211         }
3212 }
3213
3214 /* Helper functions */
3215
3216 /* Get the endpoint ! */
3217 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3218                                                   int type, int dir)
3219 {
3220         int i;
3221         struct usb_host_interface *iface = intf->cur_altsetting;
3222         struct usb_endpoint_descriptor *endp;
3223
3224         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3225                 endp = &iface->endpoint[i].desc;
3226                 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3227                     (usb_endpoint_type(endp) == type))
3228                         return endp;
3229         }
3230
3231         return NULL;
3232 }
3233
3234 /* Get the byte that describes which ports are enabled */
3235 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3236 {
3237         int i;
3238         struct usb_host_interface *iface = intf->cur_altsetting;
3239
3240         if (iface->extralen == 3) {
3241                 *ports = iface->extra[2];
3242                 return 0;
3243         }
3244
3245         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3246                 if (iface->endpoint[i].extralen == 3) {
3247                         *ports = iface->endpoint[i].extra[2];
3248                         return 0;
3249                 }
3250         }
3251
3252         return -1;
3253 }
3254
3255 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3256 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3257                                    struct usb_device *usb, gfp_t gfp)
3258 {
3259         int result;
3260
3261         usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3262                          usb_rcvintpipe(usb,
3263                                 shared_int->intr_endp->bEndpointAddress & 0x7F),
3264                          shared_int->shared_intr_buf,
3265                          1,
3266                          intr_callback, shared_int,
3267                          shared_int->intr_endp->bInterval);
3268
3269         result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3270         if (result)
3271                 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3272                         result);
3273
3274         return result;
3275 }
3276
3277 /* operations setup of the serial interface */
3278 static const struct tty_operations hso_serial_ops = {
3279         .open = hso_serial_open,
3280         .close = hso_serial_close,
3281         .write = hso_serial_write,
3282         .write_room = hso_serial_write_room,
3283         .ioctl = hso_serial_ioctl,
3284         .set_termios = hso_serial_set_termios,
3285         .chars_in_buffer = hso_serial_chars_in_buffer,
3286         .tiocmget = hso_serial_tiocmget,
3287         .tiocmset = hso_serial_tiocmset,
3288         .get_icount = hso_get_count,
3289         .unthrottle = hso_unthrottle
3290 };
3291
3292 static struct usb_driver hso_driver = {
3293         .name = driver_name,
3294         .probe = hso_probe,
3295         .disconnect = hso_disconnect,
3296         .id_table = hso_ids,
3297         .suspend = hso_suspend,
3298         .resume = hso_resume,
3299         .reset_resume = hso_resume,
3300         .supports_autosuspend = 1,
3301 };
3302
3303 static int __init hso_init(void)
3304 {
3305         int i;
3306         int result;
3307
3308         /* put it in the log */
3309         printk(KERN_INFO "hso: %s\n", version);
3310
3311         /* Initialise the serial table semaphore and table */
3312         spin_lock_init(&serial_table_lock);
3313         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3314                 serial_table[i] = NULL;
3315
3316         /* allocate our driver using the proper amount of supported minors */
3317         tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3318         if (!tty_drv)
3319                 return -ENOMEM;
3320
3321         /* fill in all needed values */
3322         tty_drv->magic = TTY_DRIVER_MAGIC;
3323         tty_drv->owner = THIS_MODULE;
3324         tty_drv->driver_name = driver_name;
3325         tty_drv->name = tty_filename;
3326
3327         /* if major number is provided as parameter, use that one */
3328         if (tty_major)
3329                 tty_drv->major = tty_major;
3330
3331         tty_drv->minor_start = 0;
3332         tty_drv->num = HSO_SERIAL_TTY_MINORS;
3333         tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3334         tty_drv->subtype = SERIAL_TYPE_NORMAL;
3335         tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3336         tty_drv->init_termios = tty_std_termios;
3337         hso_init_termios(&tty_drv->init_termios);
3338         tty_set_operations(tty_drv, &hso_serial_ops);
3339
3340         /* register the tty driver */
3341         result = tty_register_driver(tty_drv);
3342         if (result) {
3343                 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3344                         __func__, result);
3345                 return result;
3346         }
3347
3348         /* register this module as an usb driver */
3349         result = usb_register(&hso_driver);
3350         if (result) {
3351                 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3352                         result);
3353                 /* cleanup serial interface */
3354                 tty_unregister_driver(tty_drv);
3355                 return result;
3356         }
3357
3358         /* done */
3359         return 0;
3360 }
3361
3362 static void __exit hso_exit(void)
3363 {
3364         printk(KERN_INFO "hso: unloaded\n");
3365
3366         tty_unregister_driver(tty_drv);
3367         /* deregister the usb driver */
3368         usb_deregister(&hso_driver);
3369 }
3370
3371 /* Module definitions */
3372 module_init(hso_init);
3373 module_exit(hso_exit);
3374
3375 MODULE_AUTHOR(MOD_AUTHOR);
3376 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3377 MODULE_LICENSE(MOD_LICENSE);
3378
3379 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3380 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3381 module_param(debug, int, S_IRUGO | S_IWUSR);
3382
3383 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3384 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3385 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3386
3387 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3388 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3389 module_param(disable_net, int, S_IRUGO | S_IWUSR);