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 void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
 847 {
 848         struct hso_net *odev = netdev_priv(net);
 849
 850         strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
 851         usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info);
 852 }
 853
 854 static const struct ethtool_ops ops = {
 855         .get_drvinfo = hso_get_drvinfo,
 856         .get_link = ethtool_op_get_link
 857 };
 858
 859 /* called when a packet did not ack after watchdogtimeout */
 860 static void hso_net_tx_timeout(struct net_device *net)
 861 {
 862         struct hso_net *odev = netdev_priv(net);
 863
 864         if (!odev)
 865                 return;
 866
 867         /* Tell syslog we are hosed. */
 868         dev_warn(&net->dev, "Tx timed out.\n");
 869
 870         /* Tear the waiting frame off the list */
 871         if (odev->mux_bulk_tx_urb &&
 872             (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
 873                 usb_unlink_urb(odev->mux_bulk_tx_urb);
 874
 875         /* Update statistics */
 876         net->stats.tx_errors++;
 877 }
 878
 879 /* make a real packet from the received USB buffer */
 880 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
 881                         unsigned int count, unsigned char is_eop)
 882 {
 883         unsigned short temp_bytes;
 884         unsigned short buffer_offset = 0;
 885         unsigned short frame_len;
 886         unsigned char *tmp_rx_buf;
 887
 888         /* log if needed */
 889         D1("Rx %d bytes", count);
 890         DUMP(ip_pkt, min(128, (int)count));
 891
 892         while (count) {
 893                 switch (odev->rx_parse_state) {
 894                 case WAIT_IP:
 895                         /* waiting for IP header. */
 896                         /* wanted bytes - size of ip header */
 897                         temp_bytes =
 898                             (count <
 899                              odev->rx_buf_missing) ? count : odev->
 900                             rx_buf_missing;
 901
 902                         memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
 903                                odev->rx_buf_size, ip_pkt + buffer_offset,
 904                                temp_bytes);
 905
 906                         odev->rx_buf_size += temp_bytes;
 907                         buffer_offset += temp_bytes;
 908                         odev->rx_buf_missing -= temp_bytes;
 909                         count -= temp_bytes;
 910
 911                         if (!odev->rx_buf_missing) {
 912                                 /* header is complete allocate an sk_buffer and
 913                                  * continue to WAIT_DATA */
 914                                 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
 915
 916                                 if ((frame_len > DEFAULT_MRU) ||
 917                                     (frame_len < sizeof(struct iphdr))) {
 918                                         dev_err(&odev->net->dev,
 919                                                 "Invalid frame (%d) length\n",
 920                                                 frame_len);
 921                                         odev->rx_parse_state = WAIT_SYNC;
 922                                         continue;
 923                                 }
 924                                 /* Allocate an sk_buff */
 925                                 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
 926                                                                     frame_len);
 927                                 if (!odev->skb_rx_buf) {
 928                                         /* We got no receive buffer. */
 929                                         D1("could not allocate memory");
 930                                         odev->rx_parse_state = WAIT_SYNC;
 931                                         return;
 932                                 }
 933
 934                                 /* Copy what we got so far. make room for iphdr
 935                                  * after tail. */
 936                                 tmp_rx_buf =
 937                                     skb_put(odev->skb_rx_buf,
 938                                             sizeof(struct iphdr));
 939                                 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
 940                                        sizeof(struct iphdr));
 941
 942                                 /* ETH_HLEN */
 943                                 odev->rx_buf_size = sizeof(struct iphdr);
 944
 945                                 /* Filip actually use .tot_len */
 946                                 odev->rx_buf_missing =
 947                                     frame_len - sizeof(struct iphdr);
 948                                 odev->rx_parse_state = WAIT_DATA;
 949                         }
 950                         break;
 951
 952                 case WAIT_DATA:
 953                         temp_bytes = (count < odev->rx_buf_missing)
 954                                         ? count : odev->rx_buf_missing;
 955
 956                         /* Copy the rest of the bytes that are left in the
 957                          * buffer into the waiting sk_buf. */
 958                         /* Make room for temp_bytes after tail. */
 959                         tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
 960                         memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
 961
 962                         odev->rx_buf_missing -= temp_bytes;
 963                         count -= temp_bytes;
 964                         buffer_offset += temp_bytes;
 965                         odev->rx_buf_size += temp_bytes;
 966                         if (!odev->rx_buf_missing) {
 967                                 /* Packet is complete. Inject into stack. */
 968                                 /* We have IP packet here */
 969                                 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
 970                                 /* don't check it */
 971                                 odev->skb_rx_buf->ip_summed =
 972                                         CHECKSUM_UNNECESSARY;
 973
 974                                 skb_reset_mac_header(odev->skb_rx_buf);
 975
 976                                 /* Ship it off to the kernel */
 977                                 netif_rx(odev->skb_rx_buf);
 978                                 /* No longer our buffer. */
 979                                 odev->skb_rx_buf = NULL;
 980
 981                                 /* update out statistics */
 982                                 odev->net->stats.rx_packets++;
 983
 984                                 odev->net->stats.rx_bytes += odev->rx_buf_size;
 985
 986                                 odev->rx_buf_size = 0;
 987                                 odev->rx_buf_missing = sizeof(struct iphdr);
 988                                 odev->rx_parse_state = WAIT_IP;
 989                         }
 990                         break;
 991
 992                 case WAIT_SYNC:
 993                         D1(" W_S");
 994                         count = 0;
 995                         break;
 996                 default:
 997                         D1(" ");
 998                         count--;
 999                         break;
1000                 }
1001         }
1002
1003         /* Recovery mechanism for WAIT_SYNC state. */
1004         if (is_eop) {
1005                 if (odev->rx_parse_state == WAIT_SYNC) {
1006                         odev->rx_parse_state = WAIT_IP;
1007                         odev->rx_buf_size = 0;
1008                         odev->rx_buf_missing = sizeof(struct iphdr);
1009                 }
1010         }
1011 }
1012
1013 /* Moving data from usb to kernel (in interrupt state) */
1014 static void read_bulk_callback(struct urb *urb)
1015 {
1016         struct hso_net *odev = urb->context;
1017         struct net_device *net;
1018         int result;
1019         int status = urb->status;
1020
1021         /* is al ok?  (Filip: Who's Al ?) */
1022         if (status) {
1023                 handle_usb_error(status, __func__, odev->parent);
1024                 return;
1025         }
1026
1027         /* Sanity check */
1028         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1029                 D1("BULK IN callback but driver is not active!");
1030                 return;
1031         }
1032         usb_mark_last_busy(urb->dev);
1033
1034         net = odev->net;
1035
1036         if (!netif_device_present(net)) {
1037                 /* Somebody killed our network interface... */
1038                 return;
1039         }
1040
1041         if (odev->parent->port_spec & HSO_INFO_CRC_BUG) {
1042                 u32 rest;
1043                 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1044                 rest = urb->actual_length %
1045                         le16_to_cpu(odev->in_endp->wMaxPacketSize);
1046                 if (((rest == 5) || (rest == 6)) &&
1047                     !memcmp(((u8 *) urb->transfer_buffer) +
1048                             urb->actual_length - 4, crc_check, 4)) {
1049                         urb->actual_length -= 4;
1050                 }
1051         }
1052
1053         /* do we even have a packet? */
1054         if (urb->actual_length) {
1055                 /* Handle the IP stream, add header and push it onto network
1056                  * stack if the packet is complete. */
1057                 spin_lock(&odev->net_lock);
1058                 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1059                             (urb->transfer_buffer_length >
1060                              urb->actual_length) ? 1 : 0);
1061                 spin_unlock(&odev->net_lock);
1062         }
1063
1064         /* We are done with this URB, resubmit it. Prep the USB to wait for
1065          * another frame. Reuse same as received. */
1066         usb_fill_bulk_urb(urb,
1067                           odev->parent->usb,
1068                           usb_rcvbulkpipe(odev->parent->usb,
1069                                           odev->in_endp->
1070                                           bEndpointAddress & 0x7F),
1071                           urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1072                           read_bulk_callback, odev);
1073
1074         /* Give this to the USB subsystem so it can tell us when more data
1075          * arrives. */
1076         result = usb_submit_urb(urb, GFP_ATOMIC);
1077         if (result)
1078                 dev_warn(&odev->parent->interface->dev,
1079                          "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1080                          result);
1081 }
1082
1083 /* Serial driver functions */
1084
1085 static void hso_init_termios(struct ktermios *termios)
1086 {
1087         /*
1088          * The default requirements for this device are:
1089          */
1090         termios->c_iflag &=
1091                 ~(IGNBRK        /* disable ignore break */
1092                 | BRKINT        /* disable break causes interrupt */
1093                 | PARMRK        /* disable mark parity errors */
1094                 | ISTRIP        /* disable clear high bit of input characters */
1095                 | INLCR         /* disable translate NL to CR */
1096                 | IGNCR         /* disable ignore CR */
1097                 | ICRNL         /* disable translate CR to NL */
1098                 | IXON);        /* disable enable XON/XOFF flow control */
1099
1100         /* disable postprocess output characters */
1101         termios->c_oflag &= ~OPOST;
1102
1103         termios->c_lflag &=
1104                 ~(ECHO          /* disable echo input characters */
1105                 | ECHONL        /* disable echo new line */
1106                 | ICANON        /* disable erase, kill, werase, and rprnt
1107                                    special characters */
1108                 | ISIG          /* disable interrupt, quit, and suspend special
1109                                    characters */
1110                 | IEXTEN);      /* disable non-POSIX special characters */
1111
1112         termios->c_cflag &=
1113                 ~(CSIZE         /* no size */
1114                 | PARENB        /* disable parity bit */
1115                 | CBAUD         /* clear current baud rate */
1116                 | CBAUDEX);     /* clear current buad rate */
1117
1118         termios->c_cflag |= CS8;        /* character size 8 bits */
1119
1120         /* baud rate 115200 */
1121         tty_termios_encode_baud_rate(termios, 115200, 115200);
1122 }
1123
1124 static void _hso_serial_set_termios(struct tty_struct *tty,
1125                                     struct ktermios *old)
1126 {
1127         struct hso_serial *serial = get_serial_by_tty(tty);
1128         struct ktermios *termios;
1129
1130         if (!serial) {
1131                 printk(KERN_ERR "%s: no tty structures", __func__);
1132                 return;
1133         }
1134
1135         D4("port %d", serial->minor);
1136
1137         /*
1138          *      Fix up unsupported bits
1139          */
1140         termios = tty->termios;
1141         termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1142
1143         termios->c_cflag &=
1144                 ~(CSIZE         /* no size */
1145                 | PARENB        /* disable parity bit */
1146                 | CBAUD         /* clear current baud rate */
1147                 | CBAUDEX);     /* clear current buad rate */
1148
1149         termios->c_cflag |= CS8;        /* character size 8 bits */
1150
1151         /* baud rate 115200 */
1152         tty_encode_baud_rate(tty, 115200, 115200);
1153 }
1154
1155 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1156 {
1157         int result;
1158         /* We are done with this URB, resubmit it. Prep the USB to wait for
1159          * another frame */
1160         usb_fill_bulk_urb(urb, serial->parent->usb,
1161                           usb_rcvbulkpipe(serial->parent->usb,
1162                                           serial->in_endp->
1163                                           bEndpointAddress & 0x7F),
1164                           urb->transfer_buffer, serial->rx_data_length,
1165                           hso_std_serial_read_bulk_callback, serial);
1166         /* Give this to the USB subsystem so it can tell us when more data
1167          * arrives. */
1168         result = usb_submit_urb(urb, GFP_ATOMIC);
1169         if (result) {
1170                 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1171                         __func__, result);
1172         }
1173 }
1174
1175
1176
1177
1178 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1179 {
1180         int count;
1181         struct urb *curr_urb;
1182
1183         while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1184                 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1185                 count = put_rxbuf_data(curr_urb, serial);
1186                 if (count == -1)
1187                         return;
1188                 if (count == 0) {
1189                         serial->curr_rx_urb_idx++;
1190                         if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1191                                 serial->curr_rx_urb_idx = 0;
1192                         hso_resubmit_rx_bulk_urb(serial, curr_urb);
1193                 }
1194         }
1195 }
1196
1197 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1198 {
1199         int count = 0;
1200         struct urb *urb;
1201
1202         urb = serial->rx_urb[0];
1203         if (serial->open_count > 0) {
1204                 count = put_rxbuf_data(urb, serial);
1205                 if (count == -1)
1206                         return;
1207         }
1208         /* Re issue a read as long as we receive data. */
1209
1210         if (count == 0 && ((urb->actual_length != 0) ||
1211                            (serial->rx_state == RX_PENDING))) {
1212                 serial->rx_state = RX_SENT;
1213                 hso_mux_serial_read(serial);
1214         } else
1215                 serial->rx_state = RX_IDLE;
1216 }
1217
1218
1219 /* read callback for Diag and CS port */
1220 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1221 {
1222         struct hso_serial *serial = urb->context;
1223         int status = urb->status;
1224
1225         /* sanity check */
1226         if (!serial) {
1227                 D1("serial == NULL");
1228                 return;
1229         } else if (status) {
1230                 handle_usb_error(status, __func__, serial->parent);
1231                 return;
1232         }
1233
1234         D4("\n--- Got serial_read_bulk callback %02x ---", status);
1235         D1("Actual length = %d\n", urb->actual_length);
1236         DUMP1(urb->transfer_buffer, urb->actual_length);
1237
1238         /* Anyone listening? */
1239         if (serial->open_count == 0)
1240                 return;
1241
1242         if (status == 0) {
1243                 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) {
1244                         u32 rest;
1245                         u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1246                         rest =
1247                             urb->actual_length %
1248                             le16_to_cpu(serial->in_endp->wMaxPacketSize);
1249                         if (((rest == 5) || (rest == 6)) &&
1250                             !memcmp(((u8 *) urb->transfer_buffer) +
1251                                     urb->actual_length - 4, crc_check, 4)) {
1252                                 urb->actual_length -= 4;
1253                         }
1254                 }
1255                 /* Valid data, handle RX data */
1256                 spin_lock(&serial->serial_lock);
1257                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1258                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1259                 spin_unlock(&serial->serial_lock);
1260         } else if (status == -ENOENT || status == -ECONNRESET) {
1261                 /* Unlinked - check for throttled port. */
1262                 D2("Port %d, successfully unlinked urb", serial->minor);
1263                 spin_lock(&serial->serial_lock);
1264                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1265                 hso_resubmit_rx_bulk_urb(serial, urb);
1266                 spin_unlock(&serial->serial_lock);
1267         } else {
1268                 D2("Port %d, status = %d for read urb", serial->minor, status);
1269                 return;
1270         }
1271 }
1272
1273 /*
1274  * This needs to be a tasklet otherwise we will
1275  * end up recursively calling this function.
1276  */
1277 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1278 {
1279         unsigned long flags;
1280
1281         spin_lock_irqsave(&serial->serial_lock, flags);
1282         if ((serial->parent->port_spec & HSO_INTF_MUX))
1283                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1284         else
1285                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1286         spin_unlock_irqrestore(&serial->serial_lock, flags);
1287 }
1288
1289 static  void hso_unthrottle(struct tty_struct *tty)
1290 {
1291         struct hso_serial *serial = get_serial_by_tty(tty);
1292
1293         tasklet_hi_schedule(&serial->unthrottle_tasklet);
1294 }
1295
1296 static void hso_unthrottle_workfunc(struct work_struct *work)
1297 {
1298         struct hso_serial *serial =
1299             container_of(work, struct hso_serial,
1300                          retry_unthrottle_workqueue);
1301         hso_unthrottle_tasklet(serial);
1302 }
1303
1304 /* open the requested serial port */
1305 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1306 {
1307         struct hso_serial *serial = get_serial_by_index(tty->index);
1308         int result;
1309
1310         /* sanity check */
1311         if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1312                 WARN_ON(1);
1313                 tty->driver_data = NULL;
1314                 D1("Failed to open port");
1315                 return -ENODEV;
1316         }
1317
1318         mutex_lock(&serial->parent->mutex);
1319         result = usb_autopm_get_interface(serial->parent->interface);
1320         if (result < 0)
1321                 goto err_out;
1322
1323         D1("Opening %d", serial->minor);
1324         kref_get(&serial->parent->ref);
1325
1326         /* setup */
1327         spin_lock_irq(&serial->serial_lock);
1328         tty->driver_data = serial;
1329         tty_kref_put(serial->tty);
1330         serial->tty = tty_kref_get(tty);
1331         spin_unlock_irq(&serial->serial_lock);
1332
1333         /* check for port already opened, if not set the termios */
1334         serial->open_count++;
1335         if (serial->open_count == 1) {
1336                 serial->rx_state = RX_IDLE;
1337                 /* Force default termio settings */
1338                 _hso_serial_set_termios(tty, NULL);
1339                 tasklet_init(&serial->unthrottle_tasklet,
1340                              (void (*)(unsigned long))hso_unthrottle_tasklet,
1341                              (unsigned long)serial);
1342                 INIT_WORK(&serial->retry_unthrottle_workqueue,
1343                           hso_unthrottle_workfunc);
1344                 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1345                 if (result) {
1346                         hso_stop_serial_device(serial->parent);
1347                         serial->open_count--;
1348                         kref_put(&serial->parent->ref, hso_serial_ref_free);
1349                 }
1350         } else {
1351                 D1("Port was already open");
1352         }
1353
1354         usb_autopm_put_interface(serial->parent->interface);
1355
1356         /* done */
1357         if (result)
1358                 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0);
1359 err_out:
1360         mutex_unlock(&serial->parent->mutex);
1361         return result;
1362 }
1363
1364 /* close the requested serial port */
1365 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1366 {
1367         struct hso_serial *serial = tty->driver_data;
1368         u8 usb_gone;
1369
1370         D1("Closing serial port");
1371
1372         /* Open failed, no close cleanup required */
1373         if (serial == NULL)
1374                 return;
1375
1376         mutex_lock(&serial->parent->mutex);
1377         usb_gone = serial->parent->usb_gone;
1378
1379         if (!usb_gone)
1380                 usb_autopm_get_interface(serial->parent->interface);
1381
1382         /* reset the rts and dtr */
1383         /* do the actual close */
1384         serial->open_count--;
1385
1386         if (serial->open_count <= 0) {
1387                 serial->open_count = 0;
1388                 spin_lock_irq(&serial->serial_lock);
1389                 if (serial->tty == tty) {
1390                         serial->tty->driver_data = NULL;
1391                         serial->tty = NULL;
1392                         tty_kref_put(tty);
1393                 }
1394                 spin_unlock_irq(&serial->serial_lock);
1395                 if (!usb_gone)
1396                         hso_stop_serial_device(serial->parent);
1397                 tasklet_kill(&serial->unthrottle_tasklet);
1398                 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1399         }
1400
1401         if (!usb_gone)
1402                 usb_autopm_put_interface(serial->parent->interface);
1403
1404         mutex_unlock(&serial->parent->mutex);
1405
1406         kref_put(&serial->parent->ref, hso_serial_ref_free);
1407 }
1408
1409 /* close the requested serial port */
1410 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1411                             int count)
1412 {
1413         struct hso_serial *serial = get_serial_by_tty(tty);
1414         int space, tx_bytes;
1415         unsigned long flags;
1416
1417         /* sanity check */
1418         if (serial == NULL) {
1419                 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1420                 return -ENODEV;
1421         }
1422
1423         spin_lock_irqsave(&serial->serial_lock, flags);
1424
1425         space = serial->tx_data_length - serial->tx_buffer_count;
1426         tx_bytes = (count < space) ? count : space;
1427
1428         if (!tx_bytes)
1429                 goto out;
1430
1431         memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1432         serial->tx_buffer_count += tx_bytes;
1433
1434 out:
1435         spin_unlock_irqrestore(&serial->serial_lock, flags);
1436
1437         hso_kick_transmit(serial);
1438         /* done */
1439         return tx_bytes;
1440 }
1441
1442 /* how much room is there for writing */
1443 static int hso_serial_write_room(struct tty_struct *tty)
1444 {
1445         struct hso_serial *serial = get_serial_by_tty(tty);
1446         int room;
1447         unsigned long flags;
1448
1449         spin_lock_irqsave(&serial->serial_lock, flags);
1450         room = serial->tx_data_length - serial->tx_buffer_count;
1451         spin_unlock_irqrestore(&serial->serial_lock, flags);
1452
1453         /* return free room */
1454         return room;
1455 }
1456
1457 /* setup the term */
1458 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1459 {
1460         struct hso_serial *serial = get_serial_by_tty(tty);
1461         unsigned long flags;
1462
1463         if (old)
1464                 D5("Termios called with: cflags new[%d] - old[%d]",
1465                    tty->termios->c_cflag, old->c_cflag);
1466
1467         /* the actual setup */
1468         spin_lock_irqsave(&serial->serial_lock, flags);
1469         if (serial->open_count)
1470                 _hso_serial_set_termios(tty, old);
1471         else
1472                 tty->termios = old;
1473         spin_unlock_irqrestore(&serial->serial_lock, flags);
1474
1475         /* done */
1476 }
1477
1478 /* how many characters in the buffer */
1479 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1480 {
1481         struct hso_serial *serial = get_serial_by_tty(tty);
1482         int chars;
1483         unsigned long flags;
1484
1485         /* sanity check */
1486         if (serial == NULL)
1487                 return 0;
1488
1489         spin_lock_irqsave(&serial->serial_lock, flags);
1490         chars = serial->tx_buffer_count;
1491         spin_unlock_irqrestore(&serial->serial_lock, flags);
1492
1493         return chars;
1494 }
1495 static int tiocmget_submit_urb(struct hso_serial *serial,
1496                                struct hso_tiocmget *tiocmget,
1497                                struct usb_device *usb)
1498 {
1499         int result;
1500
1501         if (serial->parent->usb_gone)
1502                 return -ENODEV;
1503         usb_fill_int_urb(tiocmget->urb, usb,
1504                          usb_rcvintpipe(usb,
1505                                         tiocmget->endp->
1506                                         bEndpointAddress & 0x7F),
1507                          &tiocmget->serial_state_notification,
1508                          sizeof(struct hso_serial_state_notification),
1509                          tiocmget_intr_callback, serial,
1510                          tiocmget->endp->bInterval);
1511         result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1512         if (result) {
1513                 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1514                          result);
1515         }
1516         return result;
1517
1518 }
1519
1520 static void tiocmget_intr_callback(struct urb *urb)
1521 {
1522         struct hso_serial *serial = urb->context;
1523         struct hso_tiocmget *tiocmget;
1524         int status = urb->status;
1525         u16 UART_state_bitmap, prev_UART_state_bitmap;
1526         struct uart_icount *icount;
1527         struct hso_serial_state_notification *serial_state_notification;
1528         struct usb_device *usb;
1529
1530         /* Sanity checks */
1531         if (!serial)
1532                 return;
1533         if (status) {
1534                 handle_usb_error(status, __func__, serial->parent);
1535                 return;
1536         }
1537         tiocmget = serial->tiocmget;
1538         if (!tiocmget)
1539                 return;
1540         usb = serial->parent->usb;
1541         serial_state_notification = &tiocmget->serial_state_notification;
1542         if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1543             serial_state_notification->bNotification != B_NOTIFICATION ||
1544             le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1545             le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1546             le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1547                 dev_warn(&usb->dev,
1548                          "hso received invalid serial state notification\n");
1549                 DUMP(serial_state_notification,
1550                      sizeof(struct hso_serial_state_notification));
1551         } else {
1552
1553                 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1554                                                 UART_state_bitmap);
1555                 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1556                 icount = &tiocmget->icount;
1557                 spin_lock(&serial->serial_lock);
1558                 if ((UART_state_bitmap & B_OVERRUN) !=
1559                    (prev_UART_state_bitmap & B_OVERRUN))
1560                         icount->parity++;
1561                 if ((UART_state_bitmap & B_PARITY) !=
1562                    (prev_UART_state_bitmap & B_PARITY))
1563                         icount->parity++;
1564                 if ((UART_state_bitmap & B_FRAMING) !=
1565                    (prev_UART_state_bitmap & B_FRAMING))
1566                         icount->frame++;
1567                 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1568                    !(prev_UART_state_bitmap & B_RING_SIGNAL))
1569                         icount->rng++;
1570                 if ((UART_state_bitmap & B_BREAK) !=
1571                    (prev_UART_state_bitmap & B_BREAK))
1572                         icount->brk++;
1573                 if ((UART_state_bitmap & B_TX_CARRIER) !=
1574                    (prev_UART_state_bitmap & B_TX_CARRIER))
1575                         icount->dsr++;
1576                 if ((UART_state_bitmap & B_RX_CARRIER) !=
1577                    (prev_UART_state_bitmap & B_RX_CARRIER))
1578                         icount->dcd++;
1579                 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1580                 spin_unlock(&serial->serial_lock);
1581                 tiocmget->intr_completed = 1;
1582                 wake_up_interruptible(&tiocmget->waitq);
1583         }
1584         memset(serial_state_notification, 0,
1585                sizeof(struct hso_serial_state_notification));
1586         tiocmget_submit_urb(serial,
1587                             tiocmget,
1588                             serial->parent->usb);
1589 }
1590
1591 /*
1592  * next few functions largely stolen from drivers/serial/serial_core.c
1593  */
1594 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1595  * - mask passed in arg for lines of interest
1596  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1597  * Caller should use TIOCGICOUNT to see which one it was
1598  */
1599 static int
1600 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1601 {
1602         DECLARE_WAITQUEUE(wait, current);
1603         struct uart_icount cprev, cnow;
1604         struct hso_tiocmget  *tiocmget;
1605         int ret;
1606
1607         tiocmget = serial->tiocmget;
1608         if (!tiocmget)
1609                 return -ENOENT;
1610         /*
1611          * note the counters on entry
1612          */
1613         spin_lock_irq(&serial->serial_lock);
1614         memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1615         spin_unlock_irq(&serial->serial_lock);
1616         add_wait_queue(&tiocmget->waitq, &wait);
1617         for (;;) {
1618                 spin_lock_irq(&serial->serial_lock);
1619                 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1620                 spin_unlock_irq(&serial->serial_lock);
1621                 set_current_state(TASK_INTERRUPTIBLE);
1622                 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1623                     ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1624                     ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd))) {
1625                         ret = 0;
1626                         break;
1627                 }
1628                 schedule();
1629                 /* see if a signal did it */
1630                 if (signal_pending(current)) {
1631                         ret = -ERESTARTSYS;
1632                         break;
1633                 }
1634                 cprev = cnow;
1635         }
1636         current->state = TASK_RUNNING;
1637         remove_wait_queue(&tiocmget->waitq, &wait);
1638
1639         return ret;
1640 }
1641
1642 /*
1643  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1644  * Return: write counters to the user passed counter struct
1645  * NB: both 1->0 and 0->1 transitions are counted except for
1646  *     RI where only 0->1 is counted.
1647  */
1648 static int hso_get_count(struct tty_struct *tty,
1649                   struct serial_icounter_struct *icount)
1650 {
1651         struct uart_icount cnow;
1652         struct hso_serial *serial = get_serial_by_tty(tty);
1653         struct hso_tiocmget  *tiocmget = serial->tiocmget;
1654
1655         memset(&icount, 0, sizeof(struct serial_icounter_struct));
1656
1657         if (!tiocmget)
1658                  return -ENOENT;
1659         spin_lock_irq(&serial->serial_lock);
1660         memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1661         spin_unlock_irq(&serial->serial_lock);
1662
1663         icount->cts         = cnow.cts;
1664         icount->dsr         = cnow.dsr;
1665         icount->rng         = cnow.rng;
1666         icount->dcd         = cnow.dcd;
1667         icount->rx          = cnow.rx;
1668         icount->tx          = cnow.tx;
1669         icount->frame       = cnow.frame;
1670         icount->overrun     = cnow.overrun;
1671         icount->parity      = cnow.parity;
1672         icount->brk         = cnow.brk;
1673         icount->buf_overrun = cnow.buf_overrun;
1674
1675         return 0;
1676 }
1677
1678
1679 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
1680 {
1681         int retval;
1682         struct hso_serial *serial = get_serial_by_tty(tty);
1683         struct hso_tiocmget  *tiocmget;
1684         u16 UART_state_bitmap;
1685
1686         /* sanity check */
1687         if (!serial) {
1688                 D1("no tty structures");
1689                 return -EINVAL;
1690         }
1691         spin_lock_irq(&serial->serial_lock);
1692         retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1693             ((serial->dtr_state) ? TIOCM_DTR : 0);
1694         tiocmget = serial->tiocmget;
1695         if (tiocmget) {
1696
1697                 UART_state_bitmap = le16_to_cpu(
1698                         tiocmget->prev_UART_state_bitmap);
1699                 if (UART_state_bitmap & B_RING_SIGNAL)
1700                         retval |=  TIOCM_RNG;
1701                 if (UART_state_bitmap & B_RX_CARRIER)
1702                         retval |=  TIOCM_CD;
1703                 if (UART_state_bitmap & B_TX_CARRIER)
1704                         retval |=  TIOCM_DSR;
1705         }
1706         spin_unlock_irq(&serial->serial_lock);
1707         return retval;
1708 }
1709
1710 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
1711                                unsigned int set, unsigned int clear)
1712 {
1713         int val = 0;
1714         unsigned long flags;
1715         int if_num;
1716         struct hso_serial *serial = get_serial_by_tty(tty);
1717
1718         /* sanity check */
1719         if (!serial) {
1720                 D1("no tty structures");
1721                 return -EINVAL;
1722         }
1723
1724         if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1725                 return -EINVAL;
1726
1727         if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1728
1729         spin_lock_irqsave(&serial->serial_lock, flags);
1730         if (set & TIOCM_RTS)
1731                 serial->rts_state = 1;
1732         if (set & TIOCM_DTR)
1733                 serial->dtr_state = 1;
1734
1735         if (clear & TIOCM_RTS)
1736                 serial->rts_state = 0;
1737         if (clear & TIOCM_DTR)
1738                 serial->dtr_state = 0;
1739
1740         if (serial->dtr_state)
1741                 val |= 0x01;
1742         if (serial->rts_state)
1743                 val |= 0x02;
1744
1745         spin_unlock_irqrestore(&serial->serial_lock, flags);
1746
1747         return usb_control_msg(serial->parent->usb,
1748                                usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1749                                0x21, val, if_num, NULL, 0,
1750                                USB_CTRL_SET_TIMEOUT);
1751 }
1752
1753 static int hso_serial_ioctl(struct tty_struct *tty, struct file *file,
1754                             unsigned int cmd, unsigned long arg)
1755 {
1756         struct hso_serial *serial =  get_serial_by_tty(tty);
1757         void __user *uarg = (void __user *)arg;
1758         int ret = 0;
1759         D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1760
1761         if (!serial)
1762                 return -ENODEV;
1763         switch (cmd) {
1764         case TIOCMIWAIT:
1765                 ret = hso_wait_modem_status(serial, arg);
1766                 break;
1767         default:
1768                 ret = -ENOIOCTLCMD;
1769                 break;
1770         }
1771         return ret;
1772 }
1773
1774
1775 /* starts a transmit */
1776 static void hso_kick_transmit(struct hso_serial *serial)
1777 {
1778         u8 *temp;
1779         unsigned long flags;
1780         int res;
1781
1782         spin_lock_irqsave(&serial->serial_lock, flags);
1783         if (!serial->tx_buffer_count)
1784                 goto out;
1785
1786         if (serial->tx_urb_used)
1787                 goto out;
1788
1789         /* Wakeup USB interface if necessary */
1790         if (hso_get_activity(serial->parent) == -EAGAIN)
1791                 goto out;
1792
1793         /* Switch pointers around to avoid memcpy */
1794         temp = serial->tx_buffer;
1795         serial->tx_buffer = serial->tx_data;
1796         serial->tx_data = temp;
1797         serial->tx_data_count = serial->tx_buffer_count;
1798         serial->tx_buffer_count = 0;
1799
1800         /* If temp is set, it means we switched buffers */
1801         if (temp && serial->write_data) {
1802                 res = serial->write_data(serial);
1803                 if (res >= 0)
1804                         serial->tx_urb_used = 1;
1805         }
1806 out:
1807         spin_unlock_irqrestore(&serial->serial_lock, flags);
1808 }
1809
1810 /* make a request (for reading and writing data to muxed serial port) */
1811 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1812                               struct urb *ctrl_urb,
1813                               struct usb_ctrlrequest *ctrl_req,
1814                               u8 *ctrl_urb_data, u32 size)
1815 {
1816         int result;
1817         int pipe;
1818
1819         /* Sanity check */
1820         if (!serial || !ctrl_urb || !ctrl_req) {
1821                 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1822                 return -EINVAL;
1823         }
1824
1825         /* initialize */
1826         ctrl_req->wValue = 0;
1827         ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1828         ctrl_req->wLength = cpu_to_le16(size);
1829
1830         if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1831                 /* Reading command */
1832                 ctrl_req->bRequestType = USB_DIR_IN |
1833                                          USB_TYPE_OPTION_VENDOR |
1834                                          USB_RECIP_INTERFACE;
1835                 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1836                 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1837         } else {
1838                 /* Writing command */
1839                 ctrl_req->bRequestType = USB_DIR_OUT |
1840                                          USB_TYPE_OPTION_VENDOR |
1841                                          USB_RECIP_INTERFACE;
1842                 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1843                 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1844         }
1845         /* syslog */
1846         D2("%s command (%02x) len: %d, port: %d",
1847            type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1848            ctrl_req->bRequestType, ctrl_req->wLength, port);
1849
1850         /* Load ctrl urb */
1851         ctrl_urb->transfer_flags = 0;
1852         usb_fill_control_urb(ctrl_urb,
1853                              serial->parent->usb,
1854                              pipe,
1855                              (u8 *) ctrl_req,
1856                              ctrl_urb_data, size, ctrl_callback, serial);
1857         /* Send it on merry way */
1858         result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1859         if (result) {
1860                 dev_err(&ctrl_urb->dev->dev,
1861                         "%s failed submit ctrl_urb %d type %d\n", __func__,
1862                         result, type);
1863                 return result;
1864         }
1865
1866         /* done */
1867         return size;
1868 }
1869
1870 /* called by intr_callback when read occurs */
1871 static int hso_mux_serial_read(struct hso_serial *serial)
1872 {
1873         if (!serial)
1874                 return -EINVAL;
1875
1876         /* clean data */
1877         memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1878         /* make the request */
1879
1880         if (serial->num_rx_urbs != 1) {
1881                 dev_err(&serial->parent->interface->dev,
1882                         "ERROR: mux'd reads with multiple buffers "
1883                         "not possible\n");
1884                 return 0;
1885         }
1886         return mux_device_request(serial,
1887                                   USB_CDC_GET_ENCAPSULATED_RESPONSE,
1888                                   serial->parent->port_spec & HSO_PORT_MASK,
1889                                   serial->rx_urb[0],
1890                                   &serial->ctrl_req_rx,
1891                                   serial->rx_data[0], serial->rx_data_length);
1892 }
1893
1894 /* used for muxed serial port callback (muxed serial read) */
1895 static void intr_callback(struct urb *urb)
1896 {
1897         struct hso_shared_int *shared_int = urb->context;
1898         struct hso_serial *serial;
1899         unsigned char *port_req;
1900         int status = urb->status;
1901         int i;
1902
1903         usb_mark_last_busy(urb->dev);
1904
1905         /* sanity check */
1906         if (!shared_int)
1907                 return;
1908
1909         /* status check */
1910         if (status) {
1911                 handle_usb_error(status, __func__, NULL);
1912                 return;
1913         }
1914         D4("\n--- Got intr callback 0x%02X ---", status);
1915
1916         /* what request? */
1917         port_req = urb->transfer_buffer;
1918         D4(" port_req = 0x%.2X\n", *port_req);
1919         /* loop over all muxed ports to find the one sending this */
1920         for (i = 0; i < 8; i++) {
1921                 /* max 8 channels on MUX */
1922                 if (*port_req & (1 << i)) {
1923                         serial = get_serial_by_shared_int_and_type(shared_int,
1924                                                                    (1 << i));
1925                         if (serial != NULL) {
1926                                 D1("Pending read interrupt on port %d\n", i);
1927                                 spin_lock(&serial->serial_lock);
1928                                 if (serial->rx_state == RX_IDLE &&
1929                                         serial->open_count > 0) {
1930                                         /* Setup and send a ctrl req read on
1931                                          * port i */
1932                                         if (!serial->rx_urb_filled[0]) {
1933                                                 serial->rx_state = RX_SENT;
1934                                                 hso_mux_serial_read(serial);
1935                                         } else
1936                                                 serial->rx_state = RX_PENDING;
1937                                 } else {
1938                                         D1("Already a read pending on "
1939                                            "port %d or port not open\n", i);
1940                                 }
1941                                 spin_unlock(&serial->serial_lock);
1942                         }
1943                 }
1944         }
1945         /* Resubmit interrupt urb */
1946         hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1947 }
1948
1949 /* called for writing to muxed serial port */
1950 static int hso_mux_serial_write_data(struct hso_serial *serial)
1951 {
1952         if (NULL == serial)
1953                 return -EINVAL;
1954
1955         return mux_device_request(serial,
1956                                   USB_CDC_SEND_ENCAPSULATED_COMMAND,
1957                                   serial->parent->port_spec & HSO_PORT_MASK,
1958                                   serial->tx_urb,
1959                                   &serial->ctrl_req_tx,
1960                                   serial->tx_data, serial->tx_data_count);
1961 }
1962
1963 /* write callback for Diag and CS port */
1964 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1965 {
1966         struct hso_serial *serial = urb->context;
1967         int status = urb->status;
1968         struct tty_struct *tty;
1969
1970         /* sanity check */
1971         if (!serial) {
1972                 D1("serial == NULL");
1973                 return;
1974         }
1975
1976         spin_lock(&serial->serial_lock);
1977         serial->tx_urb_used = 0;
1978         tty = tty_kref_get(serial->tty);
1979         spin_unlock(&serial->serial_lock);
1980         if (status) {
1981                 handle_usb_error(status, __func__, serial->parent);
1982                 tty_kref_put(tty);
1983                 return;
1984         }
1985         hso_put_activity(serial->parent);
1986         if (tty) {
1987                 tty_wakeup(tty);
1988                 tty_kref_put(tty);
1989         }
1990         hso_kick_transmit(serial);
1991
1992         D1(" ");
1993 }
1994
1995 /* called for writing diag or CS serial port */
1996 static int hso_std_serial_write_data(struct hso_serial *serial)
1997 {
1998         int count = serial->tx_data_count;
1999         int result;
2000
2001         usb_fill_bulk_urb(serial->tx_urb,
2002                           serial->parent->usb,
2003                           usb_sndbulkpipe(serial->parent->usb,
2004                                           serial->out_endp->
2005                                           bEndpointAddress & 0x7F),
2006                           serial->tx_data, serial->tx_data_count,
2007                           hso_std_serial_write_bulk_callback, serial);
2008
2009         result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
2010         if (result) {
2011                 dev_warn(&serial->parent->usb->dev,
2012                          "Failed to submit urb - res %d\n", result);
2013                 return result;
2014         }
2015
2016         return count;
2017 }
2018
2019 /* callback after read or write on muxed serial port */
2020 static void ctrl_callback(struct urb *urb)
2021 {
2022         struct hso_serial *serial = urb->context;
2023         struct usb_ctrlrequest *req;
2024         int status = urb->status;
2025         struct tty_struct *tty;
2026
2027         /* sanity check */
2028         if (!serial)
2029                 return;
2030
2031         spin_lock(&serial->serial_lock);
2032         serial->tx_urb_used = 0;
2033         tty = tty_kref_get(serial->tty);
2034         spin_unlock(&serial->serial_lock);
2035         if (status) {
2036                 handle_usb_error(status, __func__, serial->parent);
2037                 tty_kref_put(tty);
2038                 return;
2039         }
2040
2041         /* what request? */
2042         req = (struct usb_ctrlrequest *)(urb->setup_packet);
2043         D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2044         D4("Actual length of urb = %d\n", urb->actual_length);
2045         DUMP1(urb->transfer_buffer, urb->actual_length);
2046
2047         if (req->bRequestType ==
2048             (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2049                 /* response to a read command */
2050                 serial->rx_urb_filled[0] = 1;
2051                 spin_lock(&serial->serial_lock);
2052                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2053                 spin_unlock(&serial->serial_lock);
2054         } else {
2055                 hso_put_activity(serial->parent);
2056                 if (tty)
2057                         tty_wakeup(tty);
2058                 /* response to a write command */
2059                 hso_kick_transmit(serial);
2060         }
2061         tty_kref_put(tty);
2062 }
2063
2064 /* handle RX data for serial port */
2065 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2066 {
2067         struct tty_struct *tty;
2068         int write_length_remaining = 0;
2069         int curr_write_len;
2070
2071         /* Sanity check */
2072         if (urb == NULL || serial == NULL) {
2073                 D1("serial = NULL");
2074                 return -2;
2075         }
2076
2077         /* All callers to put_rxbuf_data hold serial_lock */
2078         tty = tty_kref_get(serial->tty);
2079
2080         /* Push data to tty */
2081         if (tty) {
2082                 write_length_remaining = urb->actual_length -
2083                         serial->curr_rx_urb_offset;
2084                 D1("data to push to tty");
2085                 while (write_length_remaining) {
2086                         if (test_bit(TTY_THROTTLED, &tty->flags)) {
2087                                 tty_kref_put(tty);
2088                                 return -1;
2089                         }
2090                         curr_write_len =  tty_insert_flip_string
2091                                 (tty, urb->transfer_buffer +
2092                                  serial->curr_rx_urb_offset,
2093                                  write_length_remaining);
2094                         serial->curr_rx_urb_offset += curr_write_len;
2095                         write_length_remaining -= curr_write_len;
2096                         tty_flip_buffer_push(tty);
2097                 }
2098         }
2099         if (write_length_remaining == 0) {
2100                 serial->curr_rx_urb_offset = 0;
2101                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2102         }
2103         tty_kref_put(tty);
2104         return write_length_remaining;
2105 }
2106
2107
2108 /* Base driver functions */
2109
2110 static void hso_log_port(struct hso_device *hso_dev)
2111 {
2112         char *port_type;
2113         char port_dev[20];
2114
2115         switch (hso_dev->port_spec & HSO_PORT_MASK) {
2116         case HSO_PORT_CONTROL:
2117                 port_type = "Control";
2118                 break;
2119         case HSO_PORT_APP:
2120                 port_type = "Application";
2121                 break;
2122         case HSO_PORT_GPS:
2123                 port_type = "GPS";
2124                 break;
2125         case HSO_PORT_GPS_CONTROL:
2126                 port_type = "GPS control";
2127                 break;
2128         case HSO_PORT_APP2:
2129                 port_type = "Application2";
2130                 break;
2131         case HSO_PORT_PCSC:
2132                 port_type = "PCSC";
2133                 break;
2134         case HSO_PORT_DIAG:
2135                 port_type = "Diagnostic";
2136                 break;
2137         case HSO_PORT_DIAG2:
2138                 port_type = "Diagnostic2";
2139                 break;
2140         case HSO_PORT_MODEM:
2141                 port_type = "Modem";
2142                 break;
2143         case HSO_PORT_NETWORK:
2144                 port_type = "Network";
2145                 break;
2146         default:
2147                 port_type = "Unknown";
2148                 break;
2149         }
2150         if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2151                 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2152         } else
2153                 sprintf(port_dev, "/dev/%s%d", tty_filename,
2154                         dev2ser(hso_dev)->minor);
2155
2156         dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2157                 port_type, port_dev);
2158 }
2159
2160 static int hso_start_net_device(struct hso_device *hso_dev)
2161 {
2162         int i, result = 0;
2163         struct hso_net *hso_net = dev2net(hso_dev);
2164
2165         if (!hso_net)
2166                 return -ENODEV;
2167
2168         /* send URBs for all read buffers */
2169         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2170
2171                 /* Prep a receive URB */
2172                 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2173                                   hso_dev->usb,
2174                                   usb_rcvbulkpipe(hso_dev->usb,
2175                                                   hso_net->in_endp->
2176                                                   bEndpointAddress & 0x7F),
2177                                   hso_net->mux_bulk_rx_buf_pool[i],
2178                                   MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2179                                   hso_net);
2180
2181                 /* Put it out there so the device can send us stuff */
2182                 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2183                                         GFP_NOIO);
2184                 if (result)
2185                         dev_warn(&hso_dev->usb->dev,
2186                                 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2187                                 i, result);
2188         }
2189
2190         return result;
2191 }
2192
2193 static int hso_stop_net_device(struct hso_device *hso_dev)
2194 {
2195         int i;
2196         struct hso_net *hso_net = dev2net(hso_dev);
2197
2198         if (!hso_net)
2199                 return -ENODEV;
2200
2201         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2202                 if (hso_net->mux_bulk_rx_urb_pool[i])
2203                         usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2204
2205         }
2206         if (hso_net->mux_bulk_tx_urb)
2207                 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2208
2209         return 0;
2210 }
2211
2212 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2213 {
2214         int i, result = 0;
2215         struct hso_serial *serial = dev2ser(hso_dev);
2216
2217         if (!serial)
2218                 return -ENODEV;
2219
2220         /* If it is not the MUX port fill in and submit a bulk urb (already
2221          * allocated in hso_serial_start) */
2222         if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2223                 for (i = 0; i < serial->num_rx_urbs; i++) {
2224                         usb_fill_bulk_urb(serial->rx_urb[i],
2225                                           serial->parent->usb,
2226                                           usb_rcvbulkpipe(serial->parent->usb,
2227                                                           serial->in_endp->
2228                                                           bEndpointAddress &
2229                                                           0x7F),
2230                                           serial->rx_data[i],
2231                                           serial->rx_data_length,
2232                                           hso_std_serial_read_bulk_callback,
2233                                           serial);
2234                         result = usb_submit_urb(serial->rx_urb[i], flags);
2235                         if (result) {
2236                                 dev_warn(&serial->parent->usb->dev,
2237                                          "Failed to submit urb - res %d\n",
2238                                          result);
2239                                 break;
2240                         }
2241                 }
2242         } else {
2243                 mutex_lock(&serial->shared_int->shared_int_lock);
2244                 if (!serial->shared_int->use_count) {
2245                         result =
2246                             hso_mux_submit_intr_urb(serial->shared_int,
2247                                                     hso_dev->usb, flags);
2248                 }
2249                 serial->shared_int->use_count++;
2250                 mutex_unlock(&serial->shared_int->shared_int_lock);
2251         }
2252         if (serial->tiocmget)
2253                 tiocmget_submit_urb(serial,
2254                                     serial->tiocmget,
2255                                     serial->parent->usb);
2256         return result;
2257 }
2258
2259 static int hso_stop_serial_device(struct hso_device *hso_dev)
2260 {
2261         int i;
2262         struct hso_serial *serial = dev2ser(hso_dev);
2263         struct hso_tiocmget  *tiocmget;
2264
2265         if (!serial)
2266                 return -ENODEV;
2267
2268         for (i = 0; i < serial->num_rx_urbs; i++) {
2269                 if (serial->rx_urb[i]) {
2270                                 usb_kill_urb(serial->rx_urb[i]);
2271                                 serial->rx_urb_filled[i] = 0;
2272                 }
2273         }
2274         serial->curr_rx_urb_idx = 0;
2275         serial->curr_rx_urb_offset = 0;
2276
2277         if (serial->tx_urb)
2278                 usb_kill_urb(serial->tx_urb);
2279
2280         if (serial->shared_int) {
2281                 mutex_lock(&serial->shared_int->shared_int_lock);
2282                 if (serial->shared_int->use_count &&
2283                     (--serial->shared_int->use_count == 0)) {
2284                         struct urb *urb;
2285
2286                         urb = serial->shared_int->shared_intr_urb;
2287                         if (urb)
2288                                 usb_kill_urb(urb);
2289                 }
2290                 mutex_unlock(&serial->shared_int->shared_int_lock);
2291         }
2292         tiocmget = serial->tiocmget;
2293         if (tiocmget) {
2294                 wake_up_interruptible(&tiocmget->waitq);
2295                 usb_kill_urb(tiocmget->urb);
2296         }
2297
2298         return 0;
2299 }
2300
2301 static void hso_serial_common_free(struct hso_serial *serial)
2302 {
2303         int i;
2304
2305         if (serial->parent->dev)
2306                 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2307
2308         tty_unregister_device(tty_drv, serial->minor);
2309
2310         for (i = 0; i < serial->num_rx_urbs; i++) {
2311                 /* unlink and free RX URB */
2312                 usb_free_urb(serial->rx_urb[i]);
2313                 /* free the RX buffer */
2314                 kfree(serial->rx_data[i]);
2315         }
2316
2317         /* unlink and free TX URB */
2318         usb_free_urb(serial->tx_urb);
2319         kfree(serial->tx_data);
2320 }
2321
2322 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2323                                     int rx_size, int tx_size)
2324 {
2325         struct device *dev;
2326         int minor;
2327         int i;
2328
2329         minor = get_free_serial_index();
2330         if (minor < 0)
2331                 goto exit;
2332
2333         /* register our minor number */
2334         serial->parent->dev = tty_register_device(tty_drv, minor,
2335                                         &serial->parent->interface->dev);
2336         dev = serial->parent->dev;
2337         dev_set_drvdata(dev, serial->parent);
2338         i = device_create_file(dev, &dev_attr_hsotype);
2339
2340         /* fill in specific data for later use */
2341         serial->minor = minor;
2342         serial->magic = HSO_SERIAL_MAGIC;
2343         spin_lock_init(&serial->serial_lock);
2344         serial->num_rx_urbs = num_urbs;
2345
2346         /* RX, allocate urb and initialize */
2347
2348         /* prepare our RX buffer */
2349         serial->rx_data_length = rx_size;
2350         for (i = 0; i < serial->num_rx_urbs; i++) {
2351                 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2352                 if (!serial->rx_urb[i]) {
2353                         dev_err(dev, "Could not allocate urb?\n");
2354                         goto exit;
2355                 }
2356                 serial->rx_urb[i]->transfer_buffer = NULL;
2357                 serial->rx_urb[i]->transfer_buffer_length = 0;
2358                 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2359                                              GFP_KERNEL);
2360                 if (!serial->rx_data[i]) {
2361                         dev_err(dev, "%s - Out of memory\n", __func__);
2362                         goto exit;
2363                 }
2364         }
2365
2366         /* TX, allocate urb and initialize */
2367         serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2368         if (!serial->tx_urb) {
2369                 dev_err(dev, "Could not allocate urb?\n");
2370                 goto exit;
2371         }
2372         serial->tx_urb->transfer_buffer = NULL;
2373         serial->tx_urb->transfer_buffer_length = 0;
2374         /* prepare our TX buffer */
2375         serial->tx_data_count = 0;
2376         serial->tx_buffer_count = 0;
2377         serial->tx_data_length = tx_size;
2378         serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2379         if (!serial->tx_data) {
2380                 dev_err(dev, "%s - Out of memory\n", __func__);
2381                 goto exit;
2382         }
2383         serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2384         if (!serial->tx_buffer) {
2385                 dev_err(dev, "%s - Out of memory\n", __func__);
2386                 goto exit;
2387         }
2388
2389         return 0;
2390 exit:
2391         hso_serial_common_free(serial);
2392         return -1;
2393 }
2394
2395 /* Creates a general hso device */
2396 static struct hso_device *hso_create_device(struct usb_interface *intf,
2397                                             int port_spec)
2398 {
2399         struct hso_device *hso_dev;
2400
2401         hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2402         if (!hso_dev)
2403                 return NULL;
2404
2405         hso_dev->port_spec = port_spec;
2406         hso_dev->usb = interface_to_usbdev(intf);
2407         hso_dev->interface = intf;
2408         kref_init(&hso_dev->ref);
2409         mutex_init(&hso_dev->mutex);
2410
2411         INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2412         INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2413         INIT_WORK(&hso_dev->reset_device, reset_device);
2414
2415         return hso_dev;
2416 }
2417
2418 /* Removes a network device in the network device table */
2419 static int remove_net_device(struct hso_device *hso_dev)
2420 {
2421         int i;
2422
2423         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2424                 if (network_table[i] == hso_dev) {
2425                         network_table[i] = NULL;
2426                         break;
2427                 }
2428         }
2429         if (i == HSO_MAX_NET_DEVICES)
2430                 return -1;
2431         return 0;
2432 }
2433
2434 /* Frees our network device */
2435 static void hso_free_net_device(struct hso_device *hso_dev)
2436 {
2437         int i;
2438         struct hso_net *hso_net = dev2net(hso_dev);
2439
2440         if (!hso_net)
2441                 return;
2442
2443         remove_net_device(hso_net->parent);
2444
2445         if (hso_net->net) {
2446                 unregister_netdev(hso_net->net);
2447                 free_netdev(hso_net->net);
2448         }
2449
2450         /* start freeing */
2451         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2452                 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2453                 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2454                 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2455         }
2456         usb_free_urb(hso_net->mux_bulk_tx_urb);
2457         kfree(hso_net->mux_bulk_tx_buf);
2458         hso_net->mux_bulk_tx_buf = NULL;
2459
2460         kfree(hso_dev);
2461 }
2462
2463 static const struct net_device_ops hso_netdev_ops = {
2464         .ndo_open       = hso_net_open,
2465         .ndo_stop       = hso_net_close,
2466         .ndo_start_xmit = hso_net_start_xmit,
2467         .ndo_tx_timeout = hso_net_tx_timeout,
2468 };
2469
2470 /* initialize the network interface */
2471 static void hso_net_init(struct net_device *net)
2472 {
2473         struct hso_net *hso_net = netdev_priv(net);
2474
2475         D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2476
2477         /* fill in the other fields */
2478         net->netdev_ops = &hso_netdev_ops;
2479         net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2480         net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2481         net->type = ARPHRD_NONE;
2482         net->mtu = DEFAULT_MTU - 14;
2483         net->tx_queue_len = 10;
2484         SET_ETHTOOL_OPS(net, &ops);
2485
2486         /* and initialize the semaphore */
2487         spin_lock_init(&hso_net->net_lock);
2488 }
2489
2490 /* Adds a network device in the network device table */
2491 static int add_net_device(struct hso_device *hso_dev)
2492 {
2493         int i;
2494
2495         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2496                 if (network_table[i] == NULL) {
2497                         network_table[i] = hso_dev;
2498                         break;
2499                 }
2500         }
2501         if (i == HSO_MAX_NET_DEVICES)
2502                 return -1;
2503         return 0;
2504 }
2505
2506 static int hso_rfkill_set_block(void *data, bool blocked)
2507 {
2508         struct hso_device *hso_dev = data;
2509         int enabled = !blocked;
2510         int rv;
2511
2512         mutex_lock(&hso_dev->mutex);
2513         if (hso_dev->usb_gone)
2514                 rv = 0;
2515         else
2516                 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2517                                        enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2518                                        USB_CTRL_SET_TIMEOUT);
2519         mutex_unlock(&hso_dev->mutex);
2520         return rv;
2521 }
2522
2523 static const struct rfkill_ops hso_rfkill_ops = {
2524         .set_block = hso_rfkill_set_block,
2525 };
2526
2527 /* Creates and sets up everything for rfkill */
2528 static void hso_create_rfkill(struct hso_device *hso_dev,
2529                              struct usb_interface *interface)
2530 {
2531         struct hso_net *hso_net = dev2net(hso_dev);
2532         struct device *dev = &hso_net->net->dev;
2533         char *rfkn;
2534
2535         rfkn = kzalloc(20, GFP_KERNEL);
2536         if (!rfkn)
2537                 dev_err(dev, "%s - Out of memory\n", __func__);
2538
2539         snprintf(rfkn, 20, "hso-%d",
2540                  interface->altsetting->desc.bInterfaceNumber);
2541
2542         hso_net->rfkill = rfkill_alloc(rfkn,
2543                                        &interface_to_usbdev(interface)->dev,
2544                                        RFKILL_TYPE_WWAN,
2545                                        &hso_rfkill_ops, hso_dev);
2546         if (!hso_net->rfkill) {
2547                 dev_err(dev, "%s - Out of memory\n", __func__);
2548                 kfree(rfkn);
2549                 return;
2550         }
2551         if (rfkill_register(hso_net->rfkill) < 0) {
2552                 rfkill_destroy(hso_net->rfkill);
2553                 kfree(rfkn);
2554                 hso_net->rfkill = NULL;
2555                 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2556                 return;
2557         }
2558 }
2559
2560 static struct device_type hso_type = {
2561         .name   = "wwan",
2562 };
2563
2564 /* Creates our network device */
2565 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2566                                                 int port_spec)
2567 {
2568         int result, i;
2569         struct net_device *net;
2570         struct hso_net *hso_net;
2571         struct hso_device *hso_dev;
2572
2573         hso_dev = hso_create_device(interface, port_spec);
2574         if (!hso_dev)
2575                 return NULL;
2576
2577         /* allocate our network device, then we can put in our private data */
2578         /* call hso_net_init to do the basic initialization */
2579         net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2580         if (!net) {
2581                 dev_err(&interface->dev, "Unable to create ethernet device\n");
2582                 goto exit;
2583         }
2584
2585         hso_net = netdev_priv(net);
2586
2587         hso_dev->port_data.dev_net = hso_net;
2588         hso_net->net = net;
2589         hso_net->parent = hso_dev;
2590
2591         hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2592                                       USB_DIR_IN);
2593         if (!hso_net->in_endp) {
2594                 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2595                 goto exit;
2596         }
2597         hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2598                                        USB_DIR_OUT);
2599         if (!hso_net->out_endp) {
2600                 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2601                 goto exit;
2602         }
2603         SET_NETDEV_DEV(net, &interface->dev);
2604         SET_NETDEV_DEVTYPE(net, &hso_type);
2605
2606         /* registering our net device */
2607         result = register_netdev(net);
2608         if (result) {
2609                 dev_err(&interface->dev, "Failed to register device\n");
2610                 goto exit;
2611         }
2612
2613         /* start allocating */
2614         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2615                 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2616                 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2617                         dev_err(&interface->dev, "Could not allocate rx urb\n");
2618                         goto exit;
2619                 }
2620                 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2621                                                            GFP_KERNEL);
2622                 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2623                         dev_err(&interface->dev, "Could not allocate rx buf\n");
2624                         goto exit;
2625                 }
2626         }
2627         hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2628         if (!hso_net->mux_bulk_tx_urb) {
2629                 dev_err(&interface->dev, "Could not allocate tx urb\n");
2630                 goto exit;
2631         }
2632         hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2633         if (!hso_net->mux_bulk_tx_buf) {
2634                 dev_err(&interface->dev, "Could not allocate tx buf\n");
2635                 goto exit;
2636         }
2637
2638         add_net_device(hso_dev);
2639
2640         hso_log_port(hso_dev);
2641
2642         hso_create_rfkill(hso_dev, interface);
2643
2644         return hso_dev;
2645 exit:
2646         hso_free_net_device(hso_dev);
2647         return NULL;
2648 }
2649
2650 static void hso_free_tiomget(struct hso_serial *serial)
2651 {
2652         struct hso_tiocmget *tiocmget = serial->tiocmget;
2653         if (tiocmget) {
2654                 if (tiocmget->urb) {
2655                         usb_free_urb(tiocmget->urb);
2656                         tiocmget->urb = NULL;
2657                 }
2658                 serial->tiocmget = NULL;
2659                 kfree(tiocmget);
2660
2661         }
2662 }
2663
2664 /* Frees an AT channel ( goes for both mux and non-mux ) */
2665 static void hso_free_serial_device(struct hso_device *hso_dev)
2666 {
2667         struct hso_serial *serial = dev2ser(hso_dev);
2668
2669         if (!serial)
2670                 return;
2671         set_serial_by_index(serial->minor, NULL);
2672
2673         hso_serial_common_free(serial);
2674
2675         if (serial->shared_int) {
2676                 mutex_lock(&serial->shared_int->shared_int_lock);
2677                 if (--serial->shared_int->ref_count == 0)
2678                         hso_free_shared_int(serial->shared_int);
2679                 else
2680                         mutex_unlock(&serial->shared_int->shared_int_lock);
2681         }
2682         hso_free_tiomget(serial);
2683         kfree(serial);
2684         kfree(hso_dev);
2685 }
2686
2687 /* Creates a bulk AT channel */
2688 static struct hso_device *hso_create_bulk_serial_device(
2689                         struct usb_interface *interface, int port)
2690 {
2691         struct hso_device *hso_dev;
2692         struct hso_serial *serial;
2693         int num_urbs;
2694         struct hso_tiocmget *tiocmget;
2695
2696         hso_dev = hso_create_device(interface, port);
2697         if (!hso_dev)
2698                 return NULL;
2699
2700         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2701         if (!serial)
2702                 goto exit;
2703
2704         serial->parent = hso_dev;
2705         hso_dev->port_data.dev_serial = serial;
2706
2707         if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2708                 num_urbs = 2;
2709                 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2710                                            GFP_KERNEL);
2711                 /* it isn't going to break our heart if serial->tiocmget
2712                  *  allocation fails don't bother checking this.
2713                  */
2714                 if (serial->tiocmget) {
2715                         tiocmget = serial->tiocmget;
2716                         tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2717                         if (tiocmget->urb) {
2718                                 mutex_init(&tiocmget->mutex);
2719                                 init_waitqueue_head(&tiocmget->waitq);
2720                                 tiocmget->endp = hso_get_ep(
2721                                         interface,
2722                                         USB_ENDPOINT_XFER_INT,
2723                                         USB_DIR_IN);
2724                         } else
2725                                 hso_free_tiomget(serial);
2726                 }
2727         }
2728         else
2729                 num_urbs = 1;
2730
2731         if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2732                                      BULK_URB_TX_SIZE))
2733                 goto exit;
2734
2735         serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2736                                      USB_DIR_IN);
2737         if (!serial->in_endp) {
2738                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2739                 goto exit2;
2740         }
2741
2742         if (!
2743             (serial->out_endp =
2744              hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2745                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2746                 goto exit2;
2747         }
2748
2749         serial->write_data = hso_std_serial_write_data;
2750
2751         /* and record this serial */
2752         set_serial_by_index(serial->minor, serial);
2753
2754         /* setup the proc dirs and files if needed */
2755         hso_log_port(hso_dev);
2756
2757         /* done, return it */
2758         return hso_dev;
2759
2760 exit2:
2761         hso_serial_common_free(serial);
2762 exit:
2763         hso_free_tiomget(serial);
2764         kfree(serial);
2765         kfree(hso_dev);
2766         return NULL;
2767 }
2768
2769 /* Creates a multiplexed AT channel */
2770 static
2771 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2772                                                 int port,
2773                                                 struct hso_shared_int *mux)
2774 {
2775         struct hso_device *hso_dev;
2776         struct hso_serial *serial;
2777         int port_spec;
2778
2779         port_spec = HSO_INTF_MUX;
2780         port_spec &= ~HSO_PORT_MASK;
2781
2782         port_spec |= hso_mux_to_port(port);
2783         if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2784                 return NULL;
2785
2786         hso_dev = hso_create_device(interface, port_spec);
2787         if (!hso_dev)
2788                 return NULL;
2789
2790         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2791         if (!serial)
2792                 goto exit;
2793
2794         hso_dev->port_data.dev_serial = serial;
2795         serial->parent = hso_dev;
2796
2797         if (hso_serial_common_create
2798             (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2799                 goto exit;
2800
2801         serial->tx_data_length--;
2802         serial->write_data = hso_mux_serial_write_data;
2803
2804         serial->shared_int = mux;
2805         mutex_lock(&serial->shared_int->shared_int_lock);
2806         serial->shared_int->ref_count++;
2807         mutex_unlock(&serial->shared_int->shared_int_lock);
2808
2809         /* and record this serial */
2810         set_serial_by_index(serial->minor, serial);
2811
2812         /* setup the proc dirs and files if needed */
2813         hso_log_port(hso_dev);
2814
2815         /* done, return it */
2816         return hso_dev;
2817
2818 exit:
2819         if (serial) {
2820                 tty_unregister_device(tty_drv, serial->minor);
2821                 kfree(serial);
2822         }
2823         if (hso_dev)
2824                 kfree(hso_dev);
2825         return NULL;
2826
2827 }
2828
2829 static void hso_free_shared_int(struct hso_shared_int *mux)
2830 {
2831         usb_free_urb(mux->shared_intr_urb);
2832         kfree(mux->shared_intr_buf);
2833         mutex_unlock(&mux->shared_int_lock);
2834         kfree(mux);
2835 }
2836
2837 static
2838 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2839 {
2840         struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2841
2842         if (!mux)
2843                 return NULL;
2844
2845         mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2846                                     USB_DIR_IN);
2847         if (!mux->intr_endp) {
2848                 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2849                 goto exit;
2850         }
2851
2852         mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2853         if (!mux->shared_intr_urb) {
2854                 dev_err(&interface->dev, "Could not allocate intr urb?\n");
2855                 goto exit;
2856         }
2857         mux->shared_intr_buf =
2858                 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2859                         GFP_KERNEL);
2860         if (!mux->shared_intr_buf) {
2861                 dev_err(&interface->dev, "Could not allocate intr buf?\n");
2862                 goto exit;
2863         }
2864
2865         mutex_init(&mux->shared_int_lock);
2866
2867         return mux;
2868
2869 exit:
2870         kfree(mux->shared_intr_buf);
2871         usb_free_urb(mux->shared_intr_urb);
2872         kfree(mux);
2873         return NULL;
2874 }
2875
2876 /* Gets the port spec for a certain interface */
2877 static int hso_get_config_data(struct usb_interface *interface)
2878 {
2879         struct usb_device *usbdev = interface_to_usbdev(interface);
2880         u8 config_data[17];
2881         u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2882         s32 result;
2883
2884         if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2885                             0x86, 0xC0, 0, 0, config_data, 17,
2886                             USB_CTRL_SET_TIMEOUT) != 0x11) {
2887                 return -EIO;
2888         }
2889
2890         switch (config_data[if_num]) {
2891         case 0x0:
2892                 result = 0;
2893                 break;
2894         case 0x1:
2895                 result = HSO_PORT_DIAG;
2896                 break;
2897         case 0x2:
2898                 result = HSO_PORT_GPS;
2899                 break;
2900         case 0x3:
2901                 result = HSO_PORT_GPS_CONTROL;
2902                 break;
2903         case 0x4:
2904                 result = HSO_PORT_APP;
2905                 break;
2906         case 0x5:
2907                 result = HSO_PORT_APP2;
2908                 break;
2909         case 0x6:
2910                 result = HSO_PORT_CONTROL;
2911                 break;
2912         case 0x7:
2913                 result = HSO_PORT_NETWORK;
2914                 break;
2915         case 0x8:
2916                 result = HSO_PORT_MODEM;
2917                 break;
2918         case 0x9:
2919                 result = HSO_PORT_MSD;
2920                 break;
2921         case 0xa:
2922                 result = HSO_PORT_PCSC;
2923                 break;
2924         case 0xb:
2925                 result = HSO_PORT_VOICE;
2926                 break;
2927         default:
2928                 result = 0;
2929         }
2930
2931         if (result)
2932                 result |= HSO_INTF_BULK;
2933
2934         if (config_data[16] & 0x1)
2935                 result |= HSO_INFO_CRC_BUG;
2936
2937         return result;
2938 }
2939
2940 /* called once for each interface upon device insertion */
2941 static int hso_probe(struct usb_interface *interface,
2942                      const struct usb_device_id *id)
2943 {
2944         int mux, i, if_num, port_spec;
2945         unsigned char port_mask;
2946         struct hso_device *hso_dev = NULL;
2947         struct hso_shared_int *shared_int;
2948         struct hso_device *tmp_dev = NULL;
2949
2950         if_num = interface->altsetting->desc.bInterfaceNumber;
2951
2952         /* Get the interface/port specification from either driver_info or from
2953          * the device itself */
2954         if (id->driver_info)
2955                 port_spec = ((u32 *)(id->driver_info))[if_num];
2956         else
2957                 port_spec = hso_get_config_data(interface);
2958
2959         if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2960                 dev_err(&interface->dev, "Not our interface\n");
2961                 return -ENODEV;
2962         }
2963         /* Check if we need to switch to alt interfaces prior to port
2964          * configuration */
2965         if (interface->num_altsetting > 1)
2966                 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2967         interface->needs_remote_wakeup = 1;
2968
2969         /* Allocate new hso device(s) */
2970         switch (port_spec & HSO_INTF_MASK) {
2971         case HSO_INTF_MUX:
2972                 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2973                         /* Create the network device */
2974                         if (!disable_net) {
2975                                 hso_dev = hso_create_net_device(interface,
2976                                                                 port_spec);
2977                                 if (!hso_dev)
2978                                         goto exit;
2979                                 tmp_dev = hso_dev;
2980                         }
2981                 }
2982
2983                 if (hso_get_mux_ports(interface, &port_mask))
2984                         /* TODO: de-allocate everything */
2985                         goto exit;
2986
2987                 shared_int = hso_create_shared_int(interface);
2988                 if (!shared_int)
2989                         goto exit;
2990
2991                 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2992                         if (port_mask & i) {
2993                                 hso_dev = hso_create_mux_serial_device(
2994                                                 interface, i, shared_int);
2995                                 if (!hso_dev)
2996                                         goto exit;
2997                         }
2998                 }
2999
3000                 if (tmp_dev)
3001                         hso_dev = tmp_dev;
3002                 break;
3003
3004         case HSO_INTF_BULK:
3005                 /* It's a regular bulk interface */
3006                 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) &&
3007                     !disable_net)
3008                         hso_dev = hso_create_net_device(interface, port_spec);
3009                 else
3010                         hso_dev =
3011                             hso_create_bulk_serial_device(interface, port_spec);
3012                 if (!hso_dev)
3013                         goto exit;
3014                 break;
3015         default:
3016                 goto exit;
3017         }
3018
3019         /* save our data pointer in this device */
3020         usb_set_intfdata(interface, hso_dev);
3021
3022         /* done */
3023         return 0;
3024 exit:
3025         hso_free_interface(interface);
3026         return -ENODEV;
3027 }
3028
3029 /* device removed, cleaning up */
3030 static void hso_disconnect(struct usb_interface *interface)
3031 {
3032         hso_free_interface(interface);
3033
3034         /* remove reference of our private data */
3035         usb_set_intfdata(interface, NULL);
3036 }
3037
3038 static void async_get_intf(struct work_struct *data)
3039 {
3040         struct hso_device *hso_dev =
3041             container_of(data, struct hso_device, async_get_intf);
3042         usb_autopm_get_interface(hso_dev->interface);
3043 }
3044
3045 static void async_put_intf(struct work_struct *data)
3046 {
3047         struct hso_device *hso_dev =
3048             container_of(data, struct hso_device, async_put_intf);
3049         usb_autopm_put_interface(hso_dev->interface);
3050 }
3051
3052 static int hso_get_activity(struct hso_device *hso_dev)
3053 {
3054         if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3055                 if (!hso_dev->is_active) {
3056                         hso_dev->is_active = 1;
3057                         schedule_work(&hso_dev->async_get_intf);
3058                 }
3059         }
3060
3061         if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3062                 return -EAGAIN;
3063
3064         usb_mark_last_busy(hso_dev->usb);
3065
3066         return 0;
3067 }
3068
3069 static int hso_put_activity(struct hso_device *hso_dev)
3070 {
3071         if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3072                 if (hso_dev->is_active) {
3073                         hso_dev->is_active = 0;
3074                         schedule_work(&hso_dev->async_put_intf);
3075                         return -EAGAIN;
3076                 }
3077         }
3078         hso_dev->is_active = 0;
3079         return 0;
3080 }
3081
3082 /* called by kernel when we need to suspend device */
3083 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3084 {
3085         int i, result;
3086
3087         /* Stop all serial ports */
3088         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3089                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3090                         result = hso_stop_serial_device(serial_table[i]);
3091                         if (result)
3092                                 goto out;
3093                 }
3094         }
3095
3096         /* Stop all network ports */
3097         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3098                 if (network_table[i] &&
3099                     (network_table[i]->interface == iface)) {
3100                         result = hso_stop_net_device(network_table[i]);
3101                         if (result)
3102                                 goto out;
3103                 }
3104         }
3105
3106 out:
3107         return 0;
3108 }
3109
3110 /* called by kernel when we need to resume device */
3111 static int hso_resume(struct usb_interface *iface)
3112 {
3113         int i, result = 0;
3114         struct hso_net *hso_net;
3115
3116         /* Start all serial ports */
3117         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3118                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3119                         if (dev2ser(serial_table[i])->open_count) {
3120                                 result =
3121                                     hso_start_serial_device(serial_table[i], GFP_NOIO);
3122                                 hso_kick_transmit(dev2ser(serial_table[i]));
3123                                 if (result)
3124                                         goto out;
3125                         }
3126                 }
3127         }
3128
3129         /* Start all network ports */
3130         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3131                 if (network_table[i] &&
3132                     (network_table[i]->interface == iface)) {
3133                         hso_net = dev2net(network_table[i]);
3134                         if (hso_net->flags & IFF_UP) {
3135                                 /* First transmit any lingering data,
3136                                    then restart the device. */
3137                                 if (hso_net->skb_tx_buf) {
3138                                         dev_dbg(&iface->dev,
3139                                                 "Transmitting"
3140                                                 " lingering data\n");
3141                                         hso_net_start_xmit(hso_net->skb_tx_buf,
3142                                                            hso_net->net);
3143                                         hso_net->skb_tx_buf = NULL;
3144                                 }
3145                                 result = hso_start_net_device(network_table[i]);
3146                                 if (result)
3147                                         goto out;
3148                         }
3149                 }
3150         }
3151
3152 out:
3153         return result;
3154 }
3155
3156 static void reset_device(struct work_struct *data)
3157 {
3158         struct hso_device *hso_dev =
3159             container_of(data, struct hso_device, reset_device);
3160         struct usb_device *usb = hso_dev->usb;
3161         int result;
3162
3163         if (hso_dev->usb_gone) {
3164                 D1("No reset during disconnect\n");
3165         } else {
3166                 result = usb_lock_device_for_reset(usb, hso_dev->interface);
3167                 if (result < 0)
3168                         D1("unable to lock device for reset: %d\n", result);
3169                 else {
3170                         usb_reset_device(usb);
3171                         usb_unlock_device(usb);
3172                 }
3173         }
3174 }
3175
3176 static void hso_serial_ref_free(struct kref *ref)
3177 {
3178         struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3179
3180         hso_free_serial_device(hso_dev);
3181 }
3182
3183 static void hso_free_interface(struct usb_interface *interface)
3184 {
3185         struct hso_serial *hso_dev;
3186         struct tty_struct *tty;
3187         int i;
3188
3189         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3190                 if (serial_table[i] &&
3191                     (serial_table[i]->interface == interface)) {
3192                         hso_dev = dev2ser(serial_table[i]);
3193                         spin_lock_irq(&hso_dev->serial_lock);
3194                         tty = tty_kref_get(hso_dev->tty);
3195                         spin_unlock_irq(&hso_dev->serial_lock);
3196                         if (tty)
3197                                 tty_hangup(tty);
3198                         mutex_lock(&hso_dev->parent->mutex);
3199                         tty_kref_put(tty);
3200                         hso_dev->parent->usb_gone = 1;
3201                         mutex_unlock(&hso_dev->parent->mutex);
3202                         kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3203                 }
3204         }
3205
3206         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3207                 if (network_table[i] &&
3208                     (network_table[i]->interface == interface)) {
3209                         struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3210                         /* hso_stop_net_device doesn't stop the net queue since
3211                          * traffic needs to start it again when suspended */
3212                         netif_stop_queue(dev2net(network_table[i])->net);
3213                         hso_stop_net_device(network_table[i]);
3214                         cancel_work_sync(&network_table[i]->async_put_intf);
3215                         cancel_work_sync(&network_table[i]->async_get_intf);
3216                         if (rfk) {
3217                                 rfkill_unregister(rfk);
3218                                 rfkill_destroy(rfk);
3219                         }
3220                         hso_free_net_device(network_table[i]);
3221                 }
3222         }
3223 }
3224
3225 /* Helper functions */
3226
3227 /* Get the endpoint ! */
3228 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3229                                                   int type, int dir)
3230 {
3231         int i;
3232         struct usb_host_interface *iface = intf->cur_altsetting;
3233         struct usb_endpoint_descriptor *endp;
3234
3235         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3236                 endp = &iface->endpoint[i].desc;
3237                 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3238                     (usb_endpoint_type(endp) == type))
3239                         return endp;
3240         }
3241
3242         return NULL;
3243 }
3244
3245 /* Get the byte that describes which ports are enabled */
3246 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3247 {
3248         int i;
3249         struct usb_host_interface *iface = intf->cur_altsetting;
3250
3251         if (iface->extralen == 3) {
3252                 *ports = iface->extra[2];
3253                 return 0;
3254         }
3255
3256         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3257                 if (iface->endpoint[i].extralen == 3) {
3258                         *ports = iface->endpoint[i].extra[2];
3259                         return 0;
3260                 }
3261         }
3262
3263         return -1;
3264 }
3265
3266 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3267 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3268                                    struct usb_device *usb, gfp_t gfp)
3269 {
3270         int result;
3271
3272         usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3273                          usb_rcvintpipe(usb,
3274                                 shared_int->intr_endp->bEndpointAddress & 0x7F),
3275                          shared_int->shared_intr_buf,
3276                          1,
3277                          intr_callback, shared_int,
3278                          shared_int->intr_endp->bInterval);
3279
3280         result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3281         if (result)
3282                 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3283                         result);
3284
3285         return result;
3286 }
3287
3288 /* operations setup of the serial interface */
3289 static const struct tty_operations hso_serial_ops = {
3290         .open = hso_serial_open,
3291         .close = hso_serial_close,
3292         .write = hso_serial_write,
3293         .write_room = hso_serial_write_room,
3294         .ioctl = hso_serial_ioctl,
3295         .set_termios = hso_serial_set_termios,
3296         .chars_in_buffer = hso_serial_chars_in_buffer,
3297         .tiocmget = hso_serial_tiocmget,
3298         .tiocmset = hso_serial_tiocmset,
3299         .get_icount = hso_get_count,
3300         .unthrottle = hso_unthrottle
3301 };
3302
3303 static struct usb_driver hso_driver = {
3304         .name = driver_name,
3305         .probe = hso_probe,
3306         .disconnect = hso_disconnect,
3307         .id_table = hso_ids,
3308         .suspend = hso_suspend,
3309         .resume = hso_resume,
3310         .reset_resume = hso_resume,
3311         .supports_autosuspend = 1,
3312 };
3313
3314 static int __init hso_init(void)
3315 {
3316         int i;
3317         int result;
3318
3319         /* put it in the log */
3320         printk(KERN_INFO "hso: %s\n", version);
3321
3322         /* Initialise the serial table semaphore and table */
3323         spin_lock_init(&serial_table_lock);
3324         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3325                 serial_table[i] = NULL;
3326
3327         /* allocate our driver using the proper amount of supported minors */
3328         tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3329         if (!tty_drv)
3330                 return -ENOMEM;
3331
3332         /* fill in all needed values */
3333         tty_drv->magic = TTY_DRIVER_MAGIC;
3334         tty_drv->owner = THIS_MODULE;
3335         tty_drv->driver_name = driver_name;
3336         tty_drv->name = tty_filename;
3337
3338         /* if major number is provided as parameter, use that one */
3339         if (tty_major)
3340                 tty_drv->major = tty_major;
3341
3342         tty_drv->minor_start = 0;
3343         tty_drv->num = HSO_SERIAL_TTY_MINORS;
3344         tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3345         tty_drv->subtype = SERIAL_TYPE_NORMAL;
3346         tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3347         tty_drv->init_termios = tty_std_termios;
3348         hso_init_termios(&tty_drv->init_termios);
3349         tty_set_operations(tty_drv, &hso_serial_ops);
3350
3351         /* register the tty driver */
3352         result = tty_register_driver(tty_drv);
3353         if (result) {
3354                 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3355                         __func__, result);
3356                 return result;
3357         }
3358
3359         /* register this module as an usb driver */
3360         result = usb_register(&hso_driver);
3361         if (result) {
3362                 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3363                         result);
3364                 /* cleanup serial interface */
3365                 tty_unregister_driver(tty_drv);
3366                 return result;
3367         }
3368
3369         /* done */
3370         return 0;
3371 }
3372
3373 static void __exit hso_exit(void)
3374 {
3375         printk(KERN_INFO "hso: unloaded\n");
3376
3377         tty_unregister_driver(tty_drv);
3378         /* deregister the usb driver */
3379         usb_deregister(&hso_driver);
3380 }
3381
3382 /* Module definitions */
3383 module_init(hso_init);
3384 module_exit(hso_exit);
3385
3386 MODULE_AUTHOR(MOD_AUTHOR);
3387 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3388 MODULE_LICENSE(MOD_LICENSE);
3389
3390 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3391 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3392 module_param(debug, int, S_IRUGO | S_IWUSR);
3393
3394 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3395 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3396 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3397
3398 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3399 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3400 module_param(disable_net, int, S_IRUGO | S_IWUSR);