drivers/net/usb/hso.c

   1 /******************************************************************************
   2  *
   3  * Driver for Option High Speed Mobile Devices.
   4  *
   5  *  Copyright (C) 2008 Option International
   6  *  Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
   7  *                      <ajb@spheresystems.co.uk>
   8  *  Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
   9  *  Copyright (C) 2008 Novell, Inc.
  10  *
  11  *  This program is free software; you can redistribute it and/or modify
  12  *  it under the terms of the GNU General Public License version 2 as
  13  *  published by the Free Software Foundation.
  14  *
  15  *  This program is distributed in the hope that it will be useful,
  16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *  GNU General Public License for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License
  21  *  along with this program; if not, write to the Free Software
  22  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  23  *  USA
  24  *
  25  *
  26  *****************************************************************************/
  27
  28 /******************************************************************************
  29  *
  30  * Description of the device:
  31  *
  32  * Interface 0: Contains the IP network interface on the bulk end points.
  33  *              The multiplexed serial ports are using the interrupt and
  34  *              control endpoints.
  35  *              Interrupt contains a bitmap telling which multiplexed
  36  *              serialport needs servicing.
  37  *
  38  * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
  39  *              port is opened, as this have a huge impact on the network port
  40  *              throughput.
  41  *
  42  * Interface 2: Standard modem interface - circuit switched interface, this
  43  *              can be used to make a standard ppp connection however it
  44  *              should not be used in conjunction with the IP network interface
  45  *              enabled for USB performance reasons i.e. if using this set
  46  *              ideally disable_net=1.
  47  *
  48  *****************************************************************************/
  49
  50 #include <linux/sched.h>
  51 #include <linux/slab.h>
  52 #include <linux/init.h>
  53 #include <linux/delay.h>
  54 #include <linux/netdevice.h>
  55 #include <linux/module.h>
  56 #include <linux/ethtool.h>
  57 #include <linux/usb.h>
  58 #include <linux/timer.h>
  59 #include <linux/tty.h>
  60 #include <linux/tty_driver.h>
  61 #include <linux/tty_flip.h>
  62 #include <linux/kmod.h>
  63 #include <linux/rfkill.h>
  64 #include <linux/ip.h>
  65 #include <linux/uaccess.h>
  66 #include <linux/usb/cdc.h>
  67 #include <net/arp.h>
  68 #include <asm/byteorder.h>
  69 #include <linux/serial_core.h>
  70 #include <linux/serial.h>
  71
  72
  73 #define DRIVER_VERSION                  "1.2"
  74 #define MOD_AUTHOR                      "Option Wireless"
  75 #define MOD_DESCRIPTION                 "USB High Speed Option driver"
  76 #define MOD_LICENSE                     "GPL"
  77
  78 #define HSO_MAX_NET_DEVICES             10
  79 #define HSO__MAX_MTU                    2048
  80 #define DEFAULT_MTU                     1500
  81 #define DEFAULT_MRU                     1500
  82
  83 #define CTRL_URB_RX_SIZE                1024
  84 #define CTRL_URB_TX_SIZE                64
  85
  86 #define BULK_URB_RX_SIZE                4096
  87 #define BULK_URB_TX_SIZE                8192
  88
  89 #define MUX_BULK_RX_BUF_SIZE            HSO__MAX_MTU
  90 #define MUX_BULK_TX_BUF_SIZE            HSO__MAX_MTU
  91 #define MUX_BULK_RX_BUF_COUNT           4
  92 #define USB_TYPE_OPTION_VENDOR          0x20
  93
  94 /* These definitions are used with the struct hso_net flags element */
  95 /* - use *_bit operations on it. (bit indices not values.) */
  96 #define HSO_NET_RUNNING                 0
  97
  98 #define HSO_NET_TX_TIMEOUT              (HZ*10)
  99
 100 #define HSO_SERIAL_MAGIC                0x48534f31
 101
 102 /* Number of ttys to handle */
 103 #define HSO_SERIAL_TTY_MINORS           256
 104
 105 #define MAX_RX_URBS                     2
 106
 107 static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty)
 108 {
 109         if (tty)
 110                 return tty->driver_data;
 111         return NULL;
 112 }
 113
 114 /*****************************************************************************/
 115 /* Debugging functions                                                       */
 116 /*****************************************************************************/
 117 #define D__(lvl_, fmt, arg...)                          \
 118         do {                                            \
 119                 printk(lvl_ "[%d:%s]: " fmt "\n",       \
 120                        __LINE__, __func__, ## arg);     \
 121         } while (0)
 122
 123 #define D_(lvl, args...)                                \
 124         do {                                            \
 125                 if (lvl & debug)                        \
 126                         D__(KERN_INFO, args);           \
 127         } while (0)
 128
 129 #define D1(args...)     D_(0x01, ##args)
 130 #define D2(args...)     D_(0x02, ##args)
 131 #define D3(args...)     D_(0x04, ##args)
 132 #define D4(args...)     D_(0x08, ##args)
 133 #define D5(args...)     D_(0x10, ##args)
 134
 135 /*****************************************************************************/
 136 /* Enumerators                                                               */
 137 /*****************************************************************************/
 138 enum pkt_parse_state {
 139         WAIT_IP,
 140         WAIT_DATA,
 141         WAIT_SYNC
 142 };
 143
 144 /*****************************************************************************/
 145 /* Structs                                                                   */
 146 /*****************************************************************************/
 147
 148 struct hso_shared_int {
 149         struct usb_endpoint_descriptor *intr_endp;
 150         void *shared_intr_buf;
 151         struct urb *shared_intr_urb;
 152         struct usb_device *usb;
 153         int use_count;
 154         int ref_count;
 155         struct mutex shared_int_lock;
 156 };
 157
 158 struct hso_net {
 159         struct hso_device *parent;
 160         struct net_device *net;
 161         struct rfkill *rfkill;
 162
 163         struct usb_endpoint_descriptor *in_endp;
 164         struct usb_endpoint_descriptor *out_endp;
 165
 166         struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
 167         struct urb *mux_bulk_tx_urb;
 168         void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
 169         void *mux_bulk_tx_buf;
 170
 171         struct sk_buff *skb_rx_buf;
 172         struct sk_buff *skb_tx_buf;
 173
 174         enum pkt_parse_state rx_parse_state;
 175         spinlock_t net_lock;
 176
 177         unsigned short rx_buf_size;
 178         unsigned short rx_buf_missing;
 179         struct iphdr rx_ip_hdr;
 180
 181         unsigned long flags;
 182 };
 183
 184 enum rx_ctrl_state{
 185         RX_IDLE,
 186         RX_SENT,
 187         RX_PENDING
 188 };
 189
 190 #define BM_REQUEST_TYPE (0xa1)
 191 #define B_NOTIFICATION  (0x20)
 192 #define W_VALUE         (0x0)
 193 #define W_INDEX         (0x2)
 194 #define W_LENGTH        (0x2)
 195
 196 #define B_OVERRUN       (0x1<<6)
 197 #define B_PARITY        (0x1<<5)
 198 #define B_FRAMING       (0x1<<4)
 199 #define B_RING_SIGNAL   (0x1<<3)
 200 #define B_BREAK         (0x1<<2)
 201 #define B_TX_CARRIER    (0x1<<1)
 202 #define B_RX_CARRIER    (0x1<<0)
 203
 204 struct hso_serial_state_notification {
 205         u8 bmRequestType;
 206         u8 bNotification;
 207         u16 wValue;
 208         u16 wIndex;
 209         u16 wLength;
 210         u16 UART_state_bitmap;
 211 } __attribute__((packed));
 212
 213 struct hso_tiocmget {
 214         struct mutex mutex;
 215         wait_queue_head_t waitq;
 216         int    intr_completed;
 217         struct usb_endpoint_descriptor *endp;
 218         struct urb *urb;
 219         struct hso_serial_state_notification serial_state_notification;
 220         u16    prev_UART_state_bitmap;
 221         struct uart_icount icount;
 222 };
 223
 224
 225 struct hso_serial {
 226         struct hso_device *parent;
 227         int magic;
 228         u8 minor;
 229
 230         struct hso_shared_int *shared_int;
 231
 232         /* rx/tx urb could be either a bulk urb or a control urb depending
 233            on which serial port it is used on. */
 234         struct urb *rx_urb[MAX_RX_URBS];
 235         u8 num_rx_urbs;
 236         u8 *rx_data[MAX_RX_URBS];
 237         u16 rx_data_length;     /* should contain allocated length */
 238
 239         struct urb *tx_urb;
 240         u8 *tx_data;
 241         u8 *tx_buffer;
 242         u16 tx_data_length;     /* should contain allocated length */
 243         u16 tx_data_count;
 244         u16 tx_buffer_count;
 245         struct usb_ctrlrequest ctrl_req_tx;
 246         struct usb_ctrlrequest ctrl_req_rx;
 247
 248         struct usb_endpoint_descriptor *in_endp;
 249         struct usb_endpoint_descriptor *out_endp;
 250
 251         enum rx_ctrl_state rx_state;
 252         u8 rts_state;
 253         u8 dtr_state;
 254         unsigned tx_urb_used:1;
 255
 256         /* from usb_serial_port */
 257         struct tty_struct *tty;
 258         int open_count;
 259         spinlock_t serial_lock;
 260
 261         int (*write_data) (struct hso_serial *serial);
 262         struct hso_tiocmget  *tiocmget;
 263         /* Hacks required to get flow control
 264          * working on the serial receive buffers
 265          * so as not to drop characters on the floor.
 266          */
 267         int  curr_rx_urb_idx;
 268         u16  curr_rx_urb_offset;
 269         u8   rx_urb_filled[MAX_RX_URBS];
 270         struct tasklet_struct unthrottle_tasklet;
 271         struct work_struct    retry_unthrottle_workqueue;
 272 };
 273
 274 struct hso_mutex_t {
 275         struct mutex mutex;
 276         u8 allocated;
 277 };
 278
 279 struct hso_device {
 280         union {
 281                 struct hso_serial *dev_serial;
 282                 struct hso_net *dev_net;
 283         } port_data;
 284
 285         u32 port_spec;
 286
 287         u8 is_active;
 288         u8 usb_gone;
 289         struct work_struct async_get_intf;
 290         struct work_struct async_put_intf;
 291
 292         struct usb_device *usb;
 293         struct usb_interface *interface;
 294
 295         struct device *dev;
 296         struct kref ref;
 297         struct hso_mutex_t *mutex;
 298 };
 299
 300 /* Type of interface */
 301 #define HSO_INTF_MASK           0xFF00
 302 #define HSO_INTF_MUX            0x0100
 303 #define HSO_INTF_BULK           0x0200
 304
 305 /* Type of port */
 306 #define HSO_PORT_MASK           0xFF
 307 #define HSO_PORT_NO_PORT        0x0
 308 #define HSO_PORT_CONTROL        0x1
 309 #define HSO_PORT_APP            0x2
 310 #define HSO_PORT_GPS            0x3
 311 #define HSO_PORT_PCSC           0x4
 312 #define HSO_PORT_APP2           0x5
 313 #define HSO_PORT_GPS_CONTROL    0x6
 314 #define HSO_PORT_MSD            0x7
 315 #define HSO_PORT_VOICE          0x8
 316 #define HSO_PORT_DIAG2          0x9
 317 #define HSO_PORT_DIAG           0x10
 318 #define HSO_PORT_MODEM          0x11
 319 #define HSO_PORT_NETWORK        0x12
 320
 321 /* Additional device info */
 322 #define HSO_INFO_MASK           0xFF000000
 323 #define HSO_INFO_CRC_BUG        0x01000000
 324
 325 /*****************************************************************************/
 326 /* Prototypes                                                                */
 327 /*****************************************************************************/
 328 /* Serial driver functions */
 329 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
 330                                unsigned int set, unsigned int clear);
 331 static void ctrl_callback(struct urb *urb);
 332 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
 333 static void hso_kick_transmit(struct hso_serial *serial);
 334 /* Helper functions */
 335 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
 336                                    struct usb_device *usb, gfp_t gfp);
 337 static void log_usb_status(int status, const char *function);
 338 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
 339                                                   int type, int dir);
 340 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
 341 static void hso_free_interface(struct usb_interface *intf);
 342 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
 343 static int hso_stop_serial_device(struct hso_device *hso_dev);
 344 static int hso_start_net_device(struct hso_device *hso_dev);
 345 static void hso_free_shared_int(struct hso_shared_int *shared_int);
 346 static int hso_stop_net_device(struct hso_device *hso_dev);
 347 static void hso_serial_ref_free(struct kref *ref);
 348 static void hso_std_serial_read_bulk_callback(struct urb *urb);
 349 static int hso_mux_serial_read(struct hso_serial *serial);
 350 static void async_get_intf(struct work_struct *data);
 351 static void async_put_intf(struct work_struct *data);
 352 static int hso_put_activity(struct hso_device *hso_dev);
 353 static int hso_get_activity(struct hso_device *hso_dev);
 354 static void tiocmget_intr_callback(struct urb *urb);
 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__, 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__ ": " DRIVER_VERSION " " 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 static struct ktermios *hso_serial_termios[HSO_SERIAL_TTY_MINORS];
 412 static struct ktermios *hso_serial_termios_locked[HSO_SERIAL_TTY_MINORS];
 413 /* hso_mutex_table has to be declared statically as hso_device
 414  * is freed in hso_serial_open & hso_serial_close while
 415  * the mutex is still in use.
 416  */
 417 #define HSO_NUM_MUTEXES (HSO_SERIAL_TTY_MINORS+HSO_MAX_NET_DEVICES)
 418 static struct hso_mutex_t hso_mutex_table[HSO_NUM_MUTEXES];
 419 static spinlock_t hso_mutex_lock;
 420
 421 static const s32 default_port_spec[] = {
 422         HSO_INTF_MUX | HSO_PORT_NETWORK,
 423         HSO_INTF_BULK | HSO_PORT_DIAG,
 424         HSO_INTF_BULK | HSO_PORT_MODEM,
 425         0
 426 };
 427
 428 static const s32 icon321_port_spec[] = {
 429         HSO_INTF_MUX | HSO_PORT_NETWORK,
 430         HSO_INTF_BULK | HSO_PORT_DIAG2,
 431         HSO_INTF_BULK | HSO_PORT_MODEM,
 432         HSO_INTF_BULK | HSO_PORT_DIAG,
 433         0
 434 };
 435
 436 #define default_port_device(vendor, product)    \
 437         USB_DEVICE(vendor, product),    \
 438                 .driver_info = (kernel_ulong_t)default_port_spec
 439
 440 #define icon321_port_device(vendor, product)    \
 441         USB_DEVICE(vendor, product),    \
 442                 .driver_info = (kernel_ulong_t)icon321_port_spec
 443
 444 /* list of devices we support */
 445 static const struct usb_device_id hso_ids[] = {
 446         {default_port_device(0x0af0, 0x6711)},
 447         {default_port_device(0x0af0, 0x6731)},
 448         {default_port_device(0x0af0, 0x6751)},
 449         {default_port_device(0x0af0, 0x6771)},
 450         {default_port_device(0x0af0, 0x6791)},
 451         {default_port_device(0x0af0, 0x6811)},
 452         {default_port_device(0x0af0, 0x6911)},
 453         {default_port_device(0x0af0, 0x6951)},
 454         {default_port_device(0x0af0, 0x6971)},
 455         {default_port_device(0x0af0, 0x7011)},
 456         {default_port_device(0x0af0, 0x7031)},
 457         {default_port_device(0x0af0, 0x7051)},
 458         {default_port_device(0x0af0, 0x7071)},
 459         {default_port_device(0x0af0, 0x7111)},
 460         {default_port_device(0x0af0, 0x7211)},
 461         {default_port_device(0x0af0, 0x7251)},
 462         {default_port_device(0x0af0, 0x7271)},
 463         {default_port_device(0x0af0, 0x7311)},
 464         {default_port_device(0x0af0, 0xc031)},  /* Icon-Edge */
 465         {icon321_port_device(0x0af0, 0xd013)},  /* Module HSxPA */
 466         {icon321_port_device(0x0af0, 0xd031)},  /* Icon-321 */
 467         {icon321_port_device(0x0af0, 0xd033)},  /* Icon-322 */
 468         {USB_DEVICE(0x0af0, 0x7301)},           /* GE40x */
 469         {USB_DEVICE(0x0af0, 0x7361)},           /* GE40x */
 470         {USB_DEVICE(0x0af0, 0x7401)},           /* GI 0401 */
 471         {USB_DEVICE(0x0af0, 0x7501)},           /* GTM 382 */
 472         {USB_DEVICE(0x0af0, 0x7601)},           /* GE40x */
 473         {USB_DEVICE(0x0af0, 0x7701)},
 474         {USB_DEVICE(0x0af0, 0x7801)},
 475         {USB_DEVICE(0x0af0, 0x7901)},
 476         {USB_DEVICE(0x0af0, 0x7361)},
 477         {icon321_port_device(0x0af0, 0xd051)},
 478         {}
 479 };
 480 MODULE_DEVICE_TABLE(usb, hso_ids);
 481
 482 /* Sysfs attribute */
 483 static ssize_t hso_sysfs_show_porttype(struct device *dev,
 484                                        struct device_attribute *attr,
 485                                        char *buf)
 486 {
 487         struct hso_device *hso_dev = dev->driver_data;
 488         char *port_name;
 489
 490         if (!hso_dev)
 491                 return 0;
 492
 493         switch (hso_dev->port_spec & HSO_PORT_MASK) {
 494         case HSO_PORT_CONTROL:
 495                 port_name = "Control";
 496                 break;
 497         case HSO_PORT_APP:
 498                 port_name = "Application";
 499                 break;
 500         case HSO_PORT_APP2:
 501                 port_name = "Application2";
 502                 break;
 503         case HSO_PORT_GPS:
 504                 port_name = "GPS";
 505                 break;
 506         case HSO_PORT_GPS_CONTROL:
 507                 port_name = "GPS Control";
 508                 break;
 509         case HSO_PORT_PCSC:
 510                 port_name = "PCSC";
 511                 break;
 512         case HSO_PORT_DIAG:
 513                 port_name = "Diagnostic";
 514                 break;
 515         case HSO_PORT_DIAG2:
 516                 port_name = "Diagnostic2";
 517                 break;
 518         case HSO_PORT_MODEM:
 519                 port_name = "Modem";
 520                 break;
 521         case HSO_PORT_NETWORK:
 522                 port_name = "Network";
 523                 break;
 524         default:
 525                 port_name = "Unknown";
 526                 break;
 527         }
 528
 529         return sprintf(buf, "%s\n", port_name);
 530 }
 531 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
 532
 533 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
 534 {
 535         int idx;
 536
 537         for (idx = 0; idx < serial->num_rx_urbs; idx++)
 538                 if (serial->rx_urb[idx] == urb)
 539                         return idx;
 540         dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
 541         return -1;
 542 }
 543
 544 /* converts mux value to a port spec value */
 545 static u32 hso_mux_to_port(int mux)
 546 {
 547         u32 result;
 548
 549         switch (mux) {
 550         case 0x1:
 551                 result = HSO_PORT_CONTROL;
 552                 break;
 553         case 0x2:
 554                 result = HSO_PORT_APP;
 555                 break;
 556         case 0x4:
 557                 result = HSO_PORT_PCSC;
 558                 break;
 559         case 0x8:
 560                 result = HSO_PORT_GPS;
 561                 break;
 562         case 0x10:
 563                 result = HSO_PORT_APP2;
 564                 break;
 565         default:
 566                 result = HSO_PORT_NO_PORT;
 567         }
 568         return result;
 569 }
 570
 571 /* converts port spec value to a mux value */
 572 static u32 hso_port_to_mux(int port)
 573 {
 574         u32 result;
 575
 576         switch (port & HSO_PORT_MASK) {
 577         case HSO_PORT_CONTROL:
 578                 result = 0x0;
 579                 break;
 580         case HSO_PORT_APP:
 581                 result = 0x1;
 582                 break;
 583         case HSO_PORT_PCSC:
 584                 result = 0x2;
 585                 break;
 586         case HSO_PORT_GPS:
 587                 result = 0x3;
 588                 break;
 589         case HSO_PORT_APP2:
 590                 result = 0x4;
 591                 break;
 592         default:
 593                 result = 0x0;
 594         }
 595         return result;
 596 }
 597
 598 static struct hso_serial *get_serial_by_shared_int_and_type(
 599                                         struct hso_shared_int *shared_int,
 600                                         int mux)
 601 {
 602         int i, port;
 603
 604         port = hso_mux_to_port(mux);
 605
 606         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
 607                 if (serial_table[i]
 608                     && (dev2ser(serial_table[i])->shared_int == shared_int)
 609                     && ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
 610                         return dev2ser(serial_table[i]);
 611                 }
 612         }
 613
 614         return NULL;
 615 }
 616
 617 static struct hso_serial *get_serial_by_index(unsigned index)
 618 {
 619         struct hso_serial *serial = NULL;
 620         unsigned long flags;
 621
 622         spin_lock_irqsave(&serial_table_lock, flags);
 623         if (serial_table[index])
 624                 serial = dev2ser(serial_table[index]);
 625         spin_unlock_irqrestore(&serial_table_lock, flags);
 626
 627         return serial;
 628 }
 629
 630 static int get_free_serial_index(void)
 631 {
 632         int index;
 633         unsigned long flags;
 634
 635         spin_lock_irqsave(&serial_table_lock, flags);
 636         for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
 637                 if (serial_table[index] == NULL) {
 638                         spin_unlock_irqrestore(&serial_table_lock, flags);
 639                         return index;
 640                 }
 641         }
 642         spin_unlock_irqrestore(&serial_table_lock, flags);
 643
 644         printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
 645         return -1;
 646 }
 647
 648 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
 649 {
 650         unsigned long flags;
 651
 652         spin_lock_irqsave(&serial_table_lock, flags);
 653         if (serial)
 654                 serial_table[index] = serial->parent;
 655         else
 656                 serial_table[index] = NULL;
 657         spin_unlock_irqrestore(&serial_table_lock, flags);
 658 }
 659
 660
 661 static struct hso_mutex_t *hso_get_free_mutex(void)
 662 {
 663         int index;
 664         struct hso_mutex_t *curr_hso_mutex;
 665
 666         spin_lock(&hso_mutex_lock);
 667         for (index = 0; index < HSO_NUM_MUTEXES; index++) {
 668                 curr_hso_mutex = &hso_mutex_table[index];
 669                         if (!curr_hso_mutex->allocated) {
 670                                 curr_hso_mutex->allocated = 1;
 671                                 spin_unlock(&hso_mutex_lock);
 672                                 return curr_hso_mutex;
 673                         }
 674         }
 675         printk(KERN_ERR "BUG %s: no free hso_mutexs devices in table\n"
 676                , __func__);
 677         spin_unlock(&hso_mutex_lock);
 678         return NULL;
 679 }
 680
 681 static void hso_free_mutex(struct hso_mutex_t *mutex)
 682 {
 683         spin_lock(&hso_mutex_lock);
 684         mutex->allocated = 0;
 685         spin_unlock(&hso_mutex_lock);
 686 }
 687
 688 /* log a meaningful explanation of an USB status */
 689 static void log_usb_status(int status, const char *function)
 690 {
 691         char *explanation;
 692
 693         switch (status) {
 694         case -ENODEV:
 695                 explanation = "no device";
 696                 break;
 697         case -ENOENT:
 698                 explanation = "endpoint not enabled";
 699                 break;
 700         case -EPIPE:
 701                 explanation = "endpoint stalled";
 702                 break;
 703         case -ENOSPC:
 704                 explanation = "not enough bandwidth";
 705                 break;
 706         case -ESHUTDOWN:
 707                 explanation = "device disabled";
 708                 break;
 709         case -EHOSTUNREACH:
 710                 explanation = "device suspended";
 711                 break;
 712         case -EINVAL:
 713         case -EAGAIN:
 714         case -EFBIG:
 715         case -EMSGSIZE:
 716                 explanation = "internal error";
 717                 break;
 718         default:
 719                 explanation = "unknown status";
 720                 break;
 721         }
 722         D1("%s: received USB status - %s (%d)", function, explanation, status);
 723 }
 724
 725 /* Network interface functions */
 726
 727 /* called when net interface is brought up by ifconfig */
 728 static int hso_net_open(struct net_device *net)
 729 {
 730         struct hso_net *odev = netdev_priv(net);
 731         unsigned long flags = 0;
 732
 733         if (!odev) {
 734                 dev_err(&net->dev, "No net device !\n");
 735                 return -ENODEV;
 736         }
 737
 738         odev->skb_tx_buf = NULL;
 739
 740         /* setup environment */
 741         spin_lock_irqsave(&odev->net_lock, flags);
 742         odev->rx_parse_state = WAIT_IP;
 743         odev->rx_buf_size = 0;
 744         odev->rx_buf_missing = sizeof(struct iphdr);
 745         spin_unlock_irqrestore(&odev->net_lock, flags);
 746
 747         hso_start_net_device(odev->parent);
 748
 749         /* We are up and running. */
 750         set_bit(HSO_NET_RUNNING, &odev->flags);
 751
 752         /* Tell the kernel we are ready to start receiving from it */
 753         netif_start_queue(net);
 754
 755         return 0;
 756 }
 757
 758 /* called when interface is brought down by ifconfig */
 759 static int hso_net_close(struct net_device *net)
 760 {
 761         struct hso_net *odev = netdev_priv(net);
 762
 763         /* we don't need the queue anymore */
 764         netif_stop_queue(net);
 765         /* no longer running */
 766         clear_bit(HSO_NET_RUNNING, &odev->flags);
 767
 768         hso_stop_net_device(odev->parent);
 769
 770         /* done */
 771         return 0;
 772 }
 773
 774 /* USB tells is xmit done, we should start the netqueue again */
 775 static void write_bulk_callback(struct urb *urb)
 776 {
 777         struct hso_net *odev = urb->context;
 778         int status = urb->status;
 779
 780         /* Sanity check */
 781         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
 782                 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
 783                 return;
 784         }
 785
 786         /* Do we still have a valid kernel network device? */
 787         if (!netif_device_present(odev->net)) {
 788                 dev_err(&urb->dev->dev, "%s: net device not present\n",
 789                         __func__);
 790                 return;
 791         }
 792
 793         /* log status, but don't act on it, we don't need to resubmit anything
 794          * anyhow */
 795         if (status)
 796                 log_usb_status(status, __func__);
 797
 798         hso_put_activity(odev->parent);
 799
 800         /* Tell the network interface we are ready for another frame */
 801         netif_wake_queue(odev->net);
 802 }
 803
 804 /* called by kernel when we need to transmit a packet */
 805 static int hso_net_start_xmit(struct sk_buff *skb, struct net_device *net)
 806 {
 807         struct hso_net *odev = netdev_priv(net);
 808         int result;
 809
 810         /* Tell the kernel, "No more frames 'til we are done with this one." */
 811         netif_stop_queue(net);
 812         if (hso_get_activity(odev->parent) == -EAGAIN) {
 813                 odev->skb_tx_buf = skb;
 814                 return 0;
 815         }
 816
 817         /* log if asked */
 818         DUMP1(skb->data, skb->len);
 819         /* Copy it from kernel memory to OUR memory */
 820         memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
 821         D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
 822
 823         /* Fill in the URB for shipping it out. */
 824         usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
 825                           odev->parent->usb,
 826                           usb_sndbulkpipe(odev->parent->usb,
 827                                           odev->out_endp->
 828                                           bEndpointAddress & 0x7F),
 829                           odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
 830                           odev);
 831
 832         /* Deal with the Zero Length packet problem, I hope */
 833         odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
 834
 835         /* Send the URB on its merry way. */
 836         result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
 837         if (result) {
 838                 dev_warn(&odev->parent->interface->dev,
 839                         "failed mux_bulk_tx_urb %d", result);
 840                 net->stats.tx_errors++;
 841                 netif_start_queue(net);
 842         } else {
 843                 net->stats.tx_packets++;
 844                 net->stats.tx_bytes += skb->len;
 845                 /* And tell the kernel when the last transmit started. */
 846                 net->trans_start = jiffies;
 847         }
 848         dev_kfree_skb(skb);
 849         /* we're done */
 850         return result;
 851 }
 852
 853 static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
 854 {
 855         struct hso_net *odev = netdev_priv(net);
 856
 857         strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
 858         strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
 859         usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info);
 860 }
 861
 862 static struct ethtool_ops ops = {
 863         .get_drvinfo = hso_get_drvinfo,
 864         .get_link = ethtool_op_get_link
 865 };
 866
 867 /* called when a packet did not ack after watchdogtimeout */
 868 static void hso_net_tx_timeout(struct net_device *net)
 869 {
 870         struct hso_net *odev = netdev_priv(net);
 871
 872         if (!odev)
 873                 return;
 874
 875         /* Tell syslog we are hosed. */
 876         dev_warn(&net->dev, "Tx timed out.\n");
 877
 878         /* Tear the waiting frame off the list */
 879         if (odev->mux_bulk_tx_urb
 880             && (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
 881                 usb_unlink_urb(odev->mux_bulk_tx_urb);
 882
 883         /* Update statistics */
 884         net->stats.tx_errors++;
 885 }
 886
 887 /* make a real packet from the received USB buffer */
 888 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
 889                         unsigned int count, unsigned char is_eop)
 890 {
 891         unsigned short temp_bytes;
 892         unsigned short buffer_offset = 0;
 893         unsigned short frame_len;
 894         unsigned char *tmp_rx_buf;
 895
 896         /* log if needed */
 897         D1("Rx %d bytes", count);
 898         DUMP(ip_pkt, min(128, (int)count));
 899
 900         while (count) {
 901                 switch (odev->rx_parse_state) {
 902                 case WAIT_IP:
 903                         /* waiting for IP header. */
 904                         /* wanted bytes - size of ip header */
 905                         temp_bytes =
 906                             (count <
 907                              odev->rx_buf_missing) ? count : odev->
 908                             rx_buf_missing;
 909
 910                         memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
 911                                odev->rx_buf_size, ip_pkt + buffer_offset,
 912                                temp_bytes);
 913
 914                         odev->rx_buf_size += temp_bytes;
 915                         buffer_offset += temp_bytes;
 916                         odev->rx_buf_missing -= temp_bytes;
 917                         count -= temp_bytes;
 918
 919                         if (!odev->rx_buf_missing) {
 920                                 /* header is complete allocate an sk_buffer and
 921                                  * continue to WAIT_DATA */
 922                                 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
 923
 924                                 if ((frame_len > DEFAULT_MRU) ||
 925                                     (frame_len < sizeof(struct iphdr))) {
 926                                         dev_err(&odev->net->dev,
 927                                                 "Invalid frame (%d) length\n",
 928                                                 frame_len);
 929                                         odev->rx_parse_state = WAIT_SYNC;
 930                                         continue;
 931                                 }
 932                                 /* Allocate an sk_buff */
 933                                 odev->skb_rx_buf = dev_alloc_skb(frame_len);
 934                                 if (!odev->skb_rx_buf) {
 935                                         /* We got no receive buffer. */
 936                                         D1("could not allocate memory");
 937                                         odev->rx_parse_state = WAIT_SYNC;
 938                                         return;
 939                                 }
 940                                 /* Here's where it came from */
 941                                 odev->skb_rx_buf->dev = odev->net;
 942
 943                                 /* Copy what we got so far. make room for iphdr
 944                                  * after tail. */
 945                                 tmp_rx_buf =
 946                                     skb_put(odev->skb_rx_buf,
 947                                             sizeof(struct iphdr));
 948                                 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
 949                                        sizeof(struct iphdr));
 950
 951                                 /* ETH_HLEN */
 952                                 odev->rx_buf_size = sizeof(struct iphdr);
 953
 954                                 /* Filip actually use .tot_len */
 955                                 odev->rx_buf_missing =
 956                                     frame_len - sizeof(struct iphdr);
 957                                 odev->rx_parse_state = WAIT_DATA;
 958                         }
 959                         break;
 960
 961                 case WAIT_DATA:
 962                         temp_bytes = (count < odev->rx_buf_missing)
 963                                         ? count : odev->rx_buf_missing;
 964
 965                         /* Copy the rest of the bytes that are left in the
 966                          * buffer into the waiting sk_buf. */
 967                         /* Make room for temp_bytes after tail. */
 968                         tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
 969                         memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
 970
 971                         odev->rx_buf_missing -= temp_bytes;
 972                         count -= temp_bytes;
 973                         buffer_offset += temp_bytes;
 974                         odev->rx_buf_size += temp_bytes;
 975                         if (!odev->rx_buf_missing) {
 976                                 /* Packet is complete. Inject into stack. */
 977                                 /* We have IP packet here */
 978                                 odev->skb_rx_buf->protocol =
 979                                                 __constant_htons(ETH_P_IP);
 980                                 /* don't check it */
 981                                 odev->skb_rx_buf->ip_summed =
 982                                         CHECKSUM_UNNECESSARY;
 983
 984                                 skb_reset_mac_header(odev->skb_rx_buf);
 985
 986                                 /* Ship it off to the kernel */
 987                                 netif_rx(odev->skb_rx_buf);
 988                                 /* No longer our buffer. */
 989                                 odev->skb_rx_buf = NULL;
 990
 991                                 /* update out statistics */
 992                                 odev->net->stats.rx_packets++;
 993
 994                                 odev->net->stats.rx_bytes += odev->rx_buf_size;
 995
 996                                 odev->rx_buf_size = 0;
 997                                 odev->rx_buf_missing = sizeof(struct iphdr);
 998                                 odev->rx_parse_state = WAIT_IP;
 999                         }
1000                         break;
1001
1002                 case WAIT_SYNC:
1003                         D1(" W_S");
1004                         count = 0;
1005                         break;
1006                 default:
1007                         D1(" ");
1008                         count--;
1009                         break;
1010                 }
1011         }
1012
1013         /* Recovery mechanism for WAIT_SYNC state. */
1014         if (is_eop) {
1015                 if (odev->rx_parse_state == WAIT_SYNC) {
1016                         odev->rx_parse_state = WAIT_IP;
1017                         odev->rx_buf_size = 0;
1018                         odev->rx_buf_missing = sizeof(struct iphdr);
1019                 }
1020         }
1021 }
1022
1023 /* Moving data from usb to kernel (in interrupt state) */
1024 static void read_bulk_callback(struct urb *urb)
1025 {
1026         struct hso_net *odev = urb->context;
1027         struct net_device *net;
1028         int result;
1029         int status = urb->status;
1030
1031         /* is al ok?  (Filip: Who's Al ?) */
1032         if (status) {
1033                 log_usb_status(status, __func__);
1034                 return;
1035         }
1036
1037         /* Sanity check */
1038         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1039                 D1("BULK IN callback but driver is not active!");
1040                 return;
1041         }
1042         usb_mark_last_busy(urb->dev);
1043
1044         net = odev->net;
1045
1046         if (!netif_device_present(net)) {
1047                 /* Somebody killed our network interface... */
1048                 return;
1049         }
1050
1051         if (odev->parent->port_spec & HSO_INFO_CRC_BUG) {
1052                 u32 rest;
1053                 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1054                 rest = urb->actual_length % odev->in_endp->wMaxPacketSize;
1055                 if (((rest == 5) || (rest == 6))
1056                     && !memcmp(((u8 *) urb->transfer_buffer) +
1057                                urb->actual_length - 4, crc_check, 4)) {
1058                         urb->actual_length -= 4;
1059                 }
1060         }
1061
1062         /* do we even have a packet? */
1063         if (urb->actual_length) {
1064                 /* Handle the IP stream, add header and push it onto network
1065                  * stack if the packet is complete. */
1066                 spin_lock(&odev->net_lock);
1067                 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1068                             (urb->transfer_buffer_length >
1069                              urb->actual_length) ? 1 : 0);
1070                 spin_unlock(&odev->net_lock);
1071         }
1072
1073         /* We are done with this URB, resubmit it. Prep the USB to wait for
1074          * another frame. Reuse same as received. */
1075         usb_fill_bulk_urb(urb,
1076                           odev->parent->usb,
1077                           usb_rcvbulkpipe(odev->parent->usb,
1078                                           odev->in_endp->
1079                                           bEndpointAddress & 0x7F),
1080                           urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1081                           read_bulk_callback, odev);
1082
1083         /* Give this to the USB subsystem so it can tell us when more data
1084          * arrives. */
1085         result = usb_submit_urb(urb, GFP_ATOMIC);
1086         if (result)
1087                 dev_warn(&odev->parent->interface->dev,
1088                          "%s failed submit mux_bulk_rx_urb %d", __func__,
1089                          result);
1090 }
1091
1092 /* Serial driver functions */
1093
1094 static void _hso_serial_set_termios(struct tty_struct *tty,
1095                                     struct ktermios *old)
1096 {
1097         struct hso_serial *serial = get_serial_by_tty(tty);
1098         struct ktermios *termios;
1099
1100         if ((!tty) || (!tty->termios) || (!serial)) {
1101                 printk(KERN_ERR "%s: no tty structures", __func__);
1102                 return;
1103         }
1104
1105         D4("port %d", serial->minor);
1106
1107         /*
1108          * The default requirements for this device are:
1109          */
1110         termios = tty->termios;
1111         termios->c_iflag &=
1112                 ~(IGNBRK        /* disable ignore break */
1113                 | BRKINT        /* disable break causes interrupt */
1114                 | PARMRK        /* disable mark parity errors */
1115                 | ISTRIP        /* disable clear high bit of input characters */
1116                 | INLCR         /* disable translate NL to CR */
1117                 | IGNCR         /* disable ignore CR */
1118                 | ICRNL         /* disable translate CR to NL */
1119                 | IXON);        /* disable enable XON/XOFF flow control */
1120
1121         /* disable postprocess output characters */
1122         termios->c_oflag &= ~OPOST;
1123
1124         termios->c_lflag &=
1125                 ~(ECHO          /* disable echo input characters */
1126                 | ECHONL        /* disable echo new line */
1127                 | ICANON        /* disable erase, kill, werase, and rprnt
1128                                    special characters */
1129                 | ISIG          /* disable interrupt, quit, and suspend special
1130                                    characters */
1131                 | IEXTEN);      /* disable non-POSIX special characters */
1132
1133         termios->c_cflag &=
1134                 ~(CSIZE         /* no size */
1135                 | PARENB        /* disable parity bit */
1136                 | CBAUD         /* clear current baud rate */
1137                 | CBAUDEX);     /* clear current buad rate */
1138
1139         termios->c_cflag |= CS8;        /* character size 8 bits */
1140
1141         /* baud rate 115200 */
1142         tty_encode_baud_rate(serial->tty, 115200, 115200);
1143
1144         /*
1145          * Force low_latency on; otherwise the pushes are scheduled;
1146          * this is bad as it opens up the possibility of dropping bytes
1147          * on the floor.  We don't want to drop bytes on the floor. :)
1148          */
1149         serial->tty->low_latency = 1;
1150         return;
1151 }
1152
1153 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1154 {
1155         int result;
1156 #ifdef CONFIG_HSO_AUTOPM
1157         usb_mark_last_busy(urb->dev);
1158 #endif
1159         /* We are done with this URB, resubmit it. Prep the USB to wait for
1160          * another frame */
1161         usb_fill_bulk_urb(urb, serial->parent->usb,
1162                           usb_rcvbulkpipe(serial->parent->usb,
1163                                           serial->in_endp->
1164                                           bEndpointAddress & 0x7F),
1165                           urb->transfer_buffer, serial->rx_data_length,
1166                           hso_std_serial_read_bulk_callback, serial);
1167         /* Give this to the USB subsystem so it can tell us when more data
1168          * arrives. */
1169         result = usb_submit_urb(urb, GFP_ATOMIC);
1170         if (result) {
1171                 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1172                         __func__, result);
1173         }
1174 }
1175
1176
1177
1178
1179 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1180 {
1181         int count;
1182         struct urb *curr_urb;
1183
1184         while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1185                 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1186                 count = put_rxbuf_data(curr_urb, serial);
1187                 if (count == -1)
1188                         return;
1189                 if (count == 0) {
1190                         serial->curr_rx_urb_idx++;
1191                         if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1192                                 serial->curr_rx_urb_idx = 0;
1193                         hso_resubmit_rx_bulk_urb(serial, curr_urb);
1194                 }
1195         }
1196 }
1197
1198 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1199 {
1200         int count = 0;
1201         struct urb *urb;
1202
1203         urb = serial->rx_urb[0];
1204         if (serial->open_count > 0) {
1205                 count = put_rxbuf_data(urb, serial);
1206                 if (count == -1)
1207                         return;
1208         }
1209         /* Re issue a read as long as we receive data. */
1210
1211         if (count == 0 && ((urb->actual_length != 0) ||
1212                            (serial->rx_state == RX_PENDING))) {
1213                 serial->rx_state = RX_SENT;
1214                 hso_mux_serial_read(serial);
1215         } else
1216                 serial->rx_state = RX_IDLE;
1217 }
1218
1219
1220 /* read callback for Diag and CS port */
1221 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1222 {
1223         struct hso_serial *serial = urb->context;
1224         int status = urb->status;
1225
1226         /* sanity check */
1227         if (!serial) {
1228                 D1("serial == NULL");
1229                 return;
1230         } else if (status) {
1231                 log_usb_status(status, __func__);
1232                 return;
1233         }
1234
1235         D4("\n--- Got serial_read_bulk callback %02x ---", status);
1236         D1("Actual length = %d\n", urb->actual_length);
1237         DUMP1(urb->transfer_buffer, urb->actual_length);
1238
1239         /* Anyone listening? */
1240         if (serial->open_count == 0)
1241                 return;
1242
1243         if (status == 0) {
1244                 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) {
1245                         u32 rest;
1246                         u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1247                         rest =
1248                             urb->actual_length %
1249                             serial->in_endp->wMaxPacketSize;
1250                         if (((rest == 5) || (rest == 6))
1251                             && !memcmp(((u8 *) urb->transfer_buffer) +
1252                                        urb->actual_length - 4, crc_check, 4)) {
1253                                 urb->actual_length -= 4;
1254                         }
1255                 }
1256                 /* Valid data, handle RX data */
1257                 spin_lock(&serial->serial_lock);
1258                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1259                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1260                 spin_unlock(&serial->serial_lock);
1261         } else if (status == -ENOENT || status == -ECONNRESET) {
1262                 /* Unlinked - check for throttled port. */
1263                 D2("Port %d, successfully unlinked urb", serial->minor);
1264                 spin_lock(&serial->serial_lock);
1265                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1266                 hso_resubmit_rx_bulk_urb(serial, urb);
1267                 spin_unlock(&serial->serial_lock);
1268         } else {
1269                 D2("Port %d, status = %d for read urb", serial->minor, status);
1270                 return;
1271         }
1272 }
1273
1274 /*
1275  * This needs to be a tasklet otherwise we will
1276  * end up recursively calling this function.
1277  */
1278 void hso_unthrottle_tasklet(struct hso_serial *serial)
1279 {
1280         unsigned long flags;
1281
1282         spin_lock_irqsave(&serial->serial_lock, flags);
1283         if ((serial->parent->port_spec & HSO_INTF_MUX))
1284                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1285         else
1286                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1287         spin_unlock_irqrestore(&serial->serial_lock, flags);
1288 }
1289
1290 static  void hso_unthrottle(struct tty_struct *tty)
1291 {
1292         struct hso_serial *serial = get_serial_by_tty(tty);
1293
1294         tasklet_hi_schedule(&serial->unthrottle_tasklet);
1295 }
1296
1297 void hso_unthrottle_workfunc(struct work_struct *work)
1298 {
1299         struct hso_serial *serial =
1300             container_of(work, struct hso_serial,
1301                          retry_unthrottle_workqueue);
1302         hso_unthrottle_tasklet(serial);
1303 }
1304
1305 /* open the requested serial port */
1306 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1307 {
1308         struct hso_serial *serial = get_serial_by_index(tty->index);
1309         int result1 = 0, result2 = 0;
1310         struct mutex *hso_mutex = NULL;
1311         int   refcnt = 1;
1312
1313         /* sanity check */
1314         if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1315                 tty->driver_data = NULL;
1316                 D1("Failed to open port");
1317                 return -ENODEV;
1318         }
1319
1320         hso_mutex = &serial->parent->mutex->mutex;
1321         mutex_lock(hso_mutex);
1322         /* check for port already opened, if not set the termios */
1323         /* The serial->open count needs to be here as hso_serial_close
1324          *  will be called even if hso_serial_open returns -ENODEV.
1325          */
1326         serial->open_count++;
1327         result1 = usb_autopm_get_interface(serial->parent->interface);
1328         if (result1 < 0)
1329                 goto err_out;
1330
1331         D1("Opening %d", serial->minor);
1332         kref_get(&serial->parent->ref);
1333
1334         /* setup */
1335         tty->driver_data = serial;
1336         serial->tty = tty;
1337
1338         if (serial->open_count == 1) {
1339                 tty->low_latency = 1;
1340                 serial->rx_state = RX_IDLE;
1341                 /* Force default termio settings */
1342                 _hso_serial_set_termios(tty, NULL);
1343                 tasklet_init(&serial->unthrottle_tasklet,
1344                              (void (*)(unsigned long))hso_unthrottle_tasklet,
1345                              (unsigned long)serial);
1346                 INIT_WORK(&serial->retry_unthrottle_workqueue,
1347                           hso_unthrottle_workfunc);
1348                 result2 = hso_start_serial_device(serial->parent, GFP_KERNEL);
1349                 if (result2) {
1350                         hso_stop_serial_device(serial->parent);
1351                         serial->open_count--;
1352                 }
1353         } else {
1354                 D1("Port was already open");
1355         }
1356
1357         usb_autopm_put_interface(serial->parent->interface);
1358
1359         /* done */
1360         if (result1)
1361                 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0);
1362 err_out:
1363         if (result2)
1364                 refcnt = kref_put(&serial->parent->ref, hso_serial_ref_free);
1365         mutex_unlock(hso_mutex);
1366         if (refcnt == 0)
1367                 hso_free_mutex(container_of(hso_mutex,
1368                                             struct hso_mutex_t, mutex));
1369         return result1 == 0 ? result2 : result1;
1370 }
1371
1372 /* close the requested serial port */
1373 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1374 {
1375         struct hso_serial *serial = tty->driver_data;
1376         u8 usb_gone;
1377         struct mutex *hso_mutex;
1378         int refcnt;
1379
1380         D1("Closing serial port");
1381         if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1382                 D1("invalid serial structure bailing out.\n");
1383                 return;
1384         }
1385
1386         usb_gone = serial->parent->usb_gone;
1387         hso_mutex = &serial->parent->mutex->mutex;
1388         mutex_lock(hso_mutex);
1389
1390         if (!usb_gone)
1391                 usb_autopm_get_interface(serial->parent->interface);
1392
1393         /* reset the rts and dtr */
1394         /* do the actual close */
1395         serial->open_count--;
1396         if (serial->open_count <= 0) {
1397                 serial->open_count = 0;
1398                 if (serial->tty) {
1399                         serial->tty->driver_data = NULL;
1400                         serial->tty = NULL;
1401                 }
1402                 if (!usb_gone)
1403                         hso_stop_serial_device(serial->parent);
1404                 tasklet_kill(&serial->unthrottle_tasklet);
1405                 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1406         }
1407
1408         if (!usb_gone)
1409                 usb_autopm_put_interface(serial->parent->interface);
1410         refcnt = kref_put(&serial->parent->ref, hso_serial_ref_free);
1411         mutex_unlock(hso_mutex);
1412         if (refcnt == 0)
1413                 hso_free_mutex(container_of(hso_mutex,
1414                                             struct hso_mutex_t, mutex));
1415 }
1416
1417 /* close the requested serial port */
1418 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1419                             int count)
1420 {
1421         struct hso_serial *serial = get_serial_by_tty(tty);
1422         int space, tx_bytes;
1423         unsigned long flags;
1424
1425         /* sanity check */
1426         if (serial == NULL) {
1427                 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1428                 return -ENODEV;
1429         }
1430
1431         spin_lock_irqsave(&serial->serial_lock, flags);
1432
1433         space = serial->tx_data_length - serial->tx_buffer_count;
1434         tx_bytes = (count < space) ? count : space;
1435
1436         if (!tx_bytes)
1437                 goto out;
1438
1439         memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1440         serial->tx_buffer_count += tx_bytes;
1441
1442 out:
1443         spin_unlock_irqrestore(&serial->serial_lock, flags);
1444
1445         hso_kick_transmit(serial);
1446         /* done */
1447         return tx_bytes;
1448 }
1449
1450 /* how much room is there for writing */
1451 static int hso_serial_write_room(struct tty_struct *tty)
1452 {
1453         struct hso_serial *serial = get_serial_by_tty(tty);
1454         int room;
1455         unsigned long flags;
1456
1457         spin_lock_irqsave(&serial->serial_lock, flags);
1458         room = serial->tx_data_length - serial->tx_buffer_count;
1459         spin_unlock_irqrestore(&serial->serial_lock, flags);
1460
1461         /* return free room */
1462         return room;
1463 }
1464
1465 /* setup the term */
1466 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1467 {
1468         struct hso_serial *serial = get_serial_by_tty(tty);
1469         unsigned long flags;
1470
1471         if (old)
1472                 D5("Termios called with: cflags new[%d] - old[%d]",
1473                    tty->termios->c_cflag, old->c_cflag);
1474
1475         /* the actual setup */
1476         spin_lock_irqsave(&serial->serial_lock, flags);
1477         if (serial->open_count)
1478                 _hso_serial_set_termios(tty, old);
1479         else
1480                 tty->termios = old;
1481         spin_unlock_irqrestore(&serial->serial_lock, flags);
1482
1483         /* done */
1484         return;
1485 }
1486
1487 /* how many characters in the buffer */
1488 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1489 {
1490         struct hso_serial *serial = get_serial_by_tty(tty);
1491         int chars;
1492         unsigned long flags;
1493
1494         /* sanity check */
1495         if (serial == NULL)
1496                 return 0;
1497
1498         spin_lock_irqsave(&serial->serial_lock, flags);
1499         chars = serial->tx_buffer_count;
1500         spin_unlock_irqrestore(&serial->serial_lock, flags);
1501
1502         return chars;
1503 }
1504 int tiocmget_submit_urb(struct hso_serial *serial,
1505                         struct hso_tiocmget  *tiocmget,
1506                         struct usb_device *usb)
1507 {
1508         int result;
1509
1510         if (serial->parent->usb_gone)
1511                 return -ENODEV;
1512         usb_fill_int_urb(tiocmget->urb, usb,
1513                          usb_rcvintpipe(usb,
1514                                         tiocmget->endp->
1515                                         bEndpointAddress & 0x7F),
1516                          &tiocmget->serial_state_notification,
1517                          sizeof(struct hso_serial_state_notification),
1518                          tiocmget_intr_callback, serial,
1519                          tiocmget->endp->bInterval);
1520         result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1521         if (result) {
1522                 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1523                          result);
1524         }
1525         return result;
1526
1527 }
1528
1529 static void tiocmget_intr_callback(struct urb *urb)
1530 {
1531         struct hso_serial *serial = urb->context;
1532         struct hso_tiocmget *tiocmget;
1533         int status = urb->status;
1534         u16 UART_state_bitmap, prev_UART_state_bitmap;
1535         struct uart_icount *icount;
1536         struct hso_serial_state_notification *serial_state_notification;
1537         struct usb_device *usb;
1538
1539         /* Sanity checks */
1540         if (!serial)
1541                 return;
1542         if (status) {
1543                 log_usb_status(status, __func__);
1544                 return;
1545         }
1546         tiocmget = serial->tiocmget;
1547         if (!tiocmget)
1548                 return;
1549         usb = serial->parent->usb;
1550         serial_state_notification = &tiocmget->serial_state_notification;
1551         if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1552             serial_state_notification->bNotification != B_NOTIFICATION ||
1553             le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1554             le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1555             le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1556                 dev_warn(&usb->dev,
1557                          "hso received invalid serial state notification\n");
1558                 DUMP(serial_state_notification,
1559                      sizeof(hso_serial_state_notifation))
1560         } else {
1561
1562                 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1563                                                 UART_state_bitmap);
1564                 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1565                 icount = &tiocmget->icount;
1566                 spin_lock(&serial->serial_lock);
1567                 if ((UART_state_bitmap & B_OVERRUN) !=
1568                    (prev_UART_state_bitmap & B_OVERRUN))
1569                         icount->parity++;
1570                 if ((UART_state_bitmap & B_PARITY) !=
1571                    (prev_UART_state_bitmap & B_PARITY))
1572                         icount->parity++;
1573                 if ((UART_state_bitmap & B_FRAMING) !=
1574                    (prev_UART_state_bitmap & B_FRAMING))
1575                         icount->frame++;
1576                 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1577                    !(prev_UART_state_bitmap & B_RING_SIGNAL))
1578                         icount->rng++;
1579                 if ((UART_state_bitmap & B_BREAK) !=
1580                    (prev_UART_state_bitmap & B_BREAK))
1581                         icount->brk++;
1582                 if ((UART_state_bitmap & B_TX_CARRIER) !=
1583                    (prev_UART_state_bitmap & B_TX_CARRIER))
1584                         icount->dsr++;
1585                 if ((UART_state_bitmap & B_RX_CARRIER) !=
1586                    (prev_UART_state_bitmap & B_RX_CARRIER))
1587                         icount->dcd++;
1588                 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1589                 spin_unlock(&serial->serial_lock);
1590                 tiocmget->intr_completed = 1;
1591                 wake_up_interruptible(&tiocmget->waitq);
1592         }
1593         memset(serial_state_notification, 0,
1594                sizeof(struct hso_serial_state_notification));
1595         tiocmget_submit_urb(serial,
1596                             tiocmget,
1597                             serial->parent->usb);
1598 }
1599
1600 /*
1601  * next few functions largely stolen from drivers/serial/serial_core.c
1602  */
1603 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1604  * - mask passed in arg for lines of interest
1605  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1606  * Caller should use TIOCGICOUNT to see which one it was
1607  */
1608 static int
1609 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1610 {
1611         DECLARE_WAITQUEUE(wait, current);
1612         struct uart_icount cprev, cnow;
1613         struct hso_tiocmget  *tiocmget;
1614         int ret;
1615
1616         tiocmget = serial->tiocmget;
1617         if (!tiocmget)
1618                 return -ENOENT;
1619         /*
1620          * note the counters on entry
1621          */
1622         spin_lock_irq(&serial->serial_lock);
1623         memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1624         spin_unlock_irq(&serial->serial_lock);
1625         add_wait_queue(&tiocmget->waitq, &wait);
1626         for (;;) {
1627                 spin_lock_irq(&serial->serial_lock);
1628                 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1629                 spin_unlock_irq(&serial->serial_lock);
1630                 set_current_state(TASK_INTERRUPTIBLE);
1631                 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1632                     ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1633                     ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd))) {
1634                         ret = 0;
1635                         break;
1636                 }
1637                 schedule();
1638                 /* see if a signal did it */
1639                 if (signal_pending(current)) {
1640                         ret = -ERESTARTSYS;
1641                         break;
1642                 }
1643                 cprev = cnow;
1644         }
1645         current->state = TASK_RUNNING;
1646         remove_wait_queue(&tiocmget->waitq, &wait);
1647
1648         return ret;
1649 }
1650
1651 /*
1652  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1653  * Return: write counters to the user passed counter struct
1654  * NB: both 1->0 and 0->1 transitions are counted except for
1655  *     RI where only 0->1 is counted.
1656  */
1657 static int hso_get_count(struct hso_serial *serial,
1658                           struct serial_icounter_struct __user *icnt)
1659 {
1660         struct serial_icounter_struct icount;
1661         struct uart_icount cnow;
1662         struct hso_tiocmget  *tiocmget = serial->tiocmget;
1663
1664         if (!tiocmget)
1665                  return -ENOENT;
1666         spin_lock_irq(&serial->serial_lock);
1667         memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1668         spin_unlock_irq(&serial->serial_lock);
1669
1670         icount.cts         = cnow.cts;
1671         icount.dsr         = cnow.dsr;
1672         icount.rng         = cnow.rng;
1673         icount.dcd         = cnow.dcd;
1674         icount.rx          = cnow.rx;
1675         icount.tx          = cnow.tx;
1676         icount.frame       = cnow.frame;
1677         icount.overrun     = cnow.overrun;
1678         icount.parity      = cnow.parity;
1679         icount.brk         = cnow.brk;
1680         icount.buf_overrun = cnow.buf_overrun;
1681
1682         return copy_to_user(icnt, &icount, sizeof(icount)) ? -EFAULT : 0;
1683 }
1684
1685
1686 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
1687 {
1688         int retval;
1689         struct hso_serial *serial = get_serial_by_tty(tty);
1690         struct hso_tiocmget  *tiocmget;
1691         u16 UART_state_bitmap;
1692
1693         /* sanity check */
1694         if (!serial) {
1695                 D1("no tty structures");
1696                 return -EINVAL;
1697         }
1698         spin_lock_irq(&serial->serial_lock);
1699         retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1700             ((serial->dtr_state) ? TIOCM_DTR : 0);
1701         tiocmget = serial->tiocmget;
1702         if (tiocmget) {
1703
1704                 UART_state_bitmap = le16_to_cpu(
1705                         tiocmget->prev_UART_state_bitmap);
1706                 if (UART_state_bitmap & B_RING_SIGNAL)
1707                         retval |=  TIOCM_RNG;
1708                 if (UART_state_bitmap & B_RX_CARRIER)
1709                         retval |=  TIOCM_CD;
1710                 if (UART_state_bitmap & B_TX_CARRIER)
1711                         retval |=  TIOCM_DSR;
1712         }
1713         spin_unlock_irq(&serial->serial_lock);
1714         return retval;
1715 }
1716
1717 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
1718                                unsigned int set, unsigned int clear)
1719 {
1720         int val = 0;
1721         unsigned long flags;
1722         int if_num;
1723         struct hso_serial *serial = get_serial_by_tty(tty);
1724
1725         /* sanity check */
1726         if (!serial) {
1727                 D1("no tty structures");
1728                 return -EINVAL;
1729         }
1730         if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1731
1732         spin_lock_irqsave(&serial->serial_lock, flags);
1733         if (set & TIOCM_RTS)
1734                 serial->rts_state = 1;
1735         if (set & TIOCM_DTR)
1736                 serial->dtr_state = 1;
1737
1738         if (clear & TIOCM_RTS)
1739                 serial->rts_state = 0;
1740         if (clear & TIOCM_DTR)
1741                 serial->dtr_state = 0;
1742
1743         if (serial->dtr_state)
1744                 val |= 0x01;
1745         if (serial->rts_state)
1746                 val |= 0x02;
1747
1748         spin_unlock_irqrestore(&serial->serial_lock, flags);
1749
1750         return usb_control_msg(serial->parent->usb,
1751                                usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1752                                0x21, val, if_num, NULL, 0,
1753                                USB_CTRL_SET_TIMEOUT);
1754 }
1755
1756 static int hso_serial_ioctl(struct tty_struct *tty, struct file *file,
1757                             unsigned int cmd, unsigned long arg)
1758 {
1759         struct hso_serial *serial =  get_serial_by_tty(tty);
1760         void __user *uarg = (void __user *)arg;
1761         int ret = 0;
1762         D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1763
1764         if (!serial)
1765                 return -ENODEV;
1766         switch (cmd) {
1767         case TIOCMIWAIT:
1768                 ret = hso_wait_modem_status(serial, arg);
1769                 break;
1770
1771         case TIOCGICOUNT:
1772                 ret = hso_get_count(serial, uarg);
1773                 break;
1774         default:
1775                 ret = -ENOIOCTLCMD;
1776                 break;
1777         }
1778         return ret;
1779 }
1780
1781
1782 /* starts a transmit */
1783 static void hso_kick_transmit(struct hso_serial *serial)
1784 {
1785         u8 *temp;
1786         unsigned long flags;
1787         int res;
1788
1789         spin_lock_irqsave(&serial->serial_lock, flags);
1790         if (!serial->tx_buffer_count)
1791                 goto out;
1792
1793         if (serial->tx_urb_used)
1794                 goto out;
1795
1796         /* Wakeup USB interface if necessary */
1797         if (hso_get_activity(serial->parent) == -EAGAIN)
1798                 goto out;
1799
1800         /* Switch pointers around to avoid memcpy */
1801         temp = serial->tx_buffer;
1802         serial->tx_buffer = serial->tx_data;
1803         serial->tx_data = temp;
1804         serial->tx_data_count = serial->tx_buffer_count;
1805         serial->tx_buffer_count = 0;
1806
1807         /* If temp is set, it means we switched buffers */
1808         if (temp && serial->write_data) {
1809                 res = serial->write_data(serial);
1810                 if (res >= 0)
1811                         serial->tx_urb_used = 1;
1812         }
1813 out:
1814         spin_unlock_irqrestore(&serial->serial_lock, flags);
1815 }
1816
1817 /* make a request (for reading and writing data to muxed serial port) */
1818 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1819                               struct urb *ctrl_urb,
1820                               struct usb_ctrlrequest *ctrl_req,
1821                               u8 *ctrl_urb_data, u32 size)
1822 {
1823         int result;
1824         int pipe;
1825
1826         /* Sanity check */
1827         if (!serial || !ctrl_urb || !ctrl_req) {
1828                 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1829                 return -EINVAL;
1830         }
1831
1832         /* initialize */
1833         ctrl_req->wValue = 0;
1834         ctrl_req->wIndex = hso_port_to_mux(port);
1835         ctrl_req->wLength = size;
1836
1837         if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1838                 /* Reading command */
1839                 ctrl_req->bRequestType = USB_DIR_IN |
1840                                          USB_TYPE_OPTION_VENDOR |
1841                                          USB_RECIP_INTERFACE;
1842                 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1843                 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1844         } else {
1845                 /* Writing command */
1846                 ctrl_req->bRequestType = USB_DIR_OUT |
1847                                          USB_TYPE_OPTION_VENDOR |
1848                                          USB_RECIP_INTERFACE;
1849                 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1850                 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1851         }
1852         /* syslog */
1853         D2("%s command (%02x) len: %d, port: %d",
1854            type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1855            ctrl_req->bRequestType, ctrl_req->wLength, port);
1856
1857         /* Load ctrl urb */
1858         ctrl_urb->transfer_flags = 0;
1859         usb_fill_control_urb(ctrl_urb,
1860                              serial->parent->usb,
1861                              pipe,
1862                              (u8 *) ctrl_req,
1863                              ctrl_urb_data, size, ctrl_callback, serial);
1864         /* Send it on merry way */
1865         result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1866         if (result) {
1867                 dev_err(&ctrl_urb->dev->dev,
1868                         "%s failed submit ctrl_urb %d type %d", __func__,
1869                         result, type);
1870                 return result;
1871         }
1872
1873         /* done */
1874         return size;
1875 }
1876
1877 /* called by intr_callback when read occurs */
1878 static int hso_mux_serial_read(struct hso_serial *serial)
1879 {
1880         if (!serial)
1881                 return -EINVAL;
1882
1883         /* clean data */
1884         memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1885         /* make the request */
1886
1887         if (serial->num_rx_urbs != 1) {
1888                 dev_err(&serial->parent->interface->dev,
1889                         "ERROR: mux'd reads with multiple buffers "
1890                         "not possible\n");
1891                 return 0;
1892         }
1893         return mux_device_request(serial,
1894                                   USB_CDC_GET_ENCAPSULATED_RESPONSE,
1895                                   serial->parent->port_spec & HSO_PORT_MASK,
1896                                   serial->rx_urb[0],
1897                                   &serial->ctrl_req_rx,
1898                                   serial->rx_data[0], serial->rx_data_length);
1899 }
1900
1901 /* used for muxed serial port callback (muxed serial read) */
1902 static void intr_callback(struct urb *urb)
1903 {
1904         struct hso_shared_int *shared_int = urb->context;
1905         struct hso_serial *serial;
1906         unsigned char *port_req;
1907         int status = urb->status;
1908         int i;
1909
1910         usb_mark_last_busy(urb->dev);
1911
1912         /* sanity check */
1913         if (!shared_int)
1914                 return;
1915
1916         /* status check */
1917         if (status) {
1918                 log_usb_status(status, __func__);
1919                 return;
1920         }
1921         D4("\n--- Got intr callback 0x%02X ---", status);
1922
1923         /* what request? */
1924         port_req = urb->transfer_buffer;
1925         D4(" port_req = 0x%.2X\n", *port_req);
1926         /* loop over all muxed ports to find the one sending this */
1927         for (i = 0; i < 8; i++) {
1928                 /* max 8 channels on MUX */
1929                 if (*port_req & (1 << i)) {
1930                         serial = get_serial_by_shared_int_and_type(shared_int,
1931                                                                    (1 << i));
1932                         if (serial != NULL) {
1933                                 D1("Pending read interrupt on port %d\n", i);
1934                                 spin_lock(&serial->serial_lock);
1935                                 if (serial->rx_state == RX_IDLE) {
1936                                         /* Setup and send a ctrl req read on
1937                                          * port i */
1938                                 if (!serial->rx_urb_filled[0]) {
1939                                                 serial->rx_state = RX_SENT;
1940                                                 hso_mux_serial_read(serial);
1941                                         } else
1942                                                 serial->rx_state = RX_PENDING;
1943
1944                                 } else {
1945                                         D1("Already pending a read on "
1946                                            "port %d\n", i);
1947                                 }
1948                                 spin_unlock(&serial->serial_lock);
1949                         }
1950                 }
1951         }
1952         /* Resubmit interrupt urb */
1953         hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1954 }
1955
1956 /* called for writing to muxed serial port */
1957 static int hso_mux_serial_write_data(struct hso_serial *serial)
1958 {
1959         if (NULL == serial)
1960                 return -EINVAL;
1961
1962         return mux_device_request(serial,
1963                                   USB_CDC_SEND_ENCAPSULATED_COMMAND,
1964                                   serial->parent->port_spec & HSO_PORT_MASK,
1965                                   serial->tx_urb,
1966                                   &serial->ctrl_req_tx,
1967                                   serial->tx_data, serial->tx_data_count);
1968 }
1969
1970 /* write callback for Diag and CS port */
1971 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1972 {
1973         struct hso_serial *serial = urb->context;
1974         int status = urb->status;
1975
1976         /* sanity check */
1977         if (!serial) {
1978                 D1("serial == NULL");
1979                 return;
1980         }
1981
1982         spin_lock(&serial->serial_lock);
1983         serial->tx_urb_used = 0;
1984         spin_unlock(&serial->serial_lock);
1985         if (status) {
1986                 log_usb_status(status, __func__);
1987                 return;
1988         }
1989         hso_put_activity(serial->parent);
1990         if (serial->tty)
1991                 tty_wakeup(serial->tty);
1992         hso_kick_transmit(serial);
1993
1994         D1(" ");
1995         return;
1996 }
1997
1998 /* called for writing diag or CS serial port */
1999 static int hso_std_serial_write_data(struct hso_serial *serial)
2000 {
2001         int count = serial->tx_data_count;
2002         int result;
2003
2004         usb_fill_bulk_urb(serial->tx_urb,
2005                           serial->parent->usb,
2006                           usb_sndbulkpipe(serial->parent->usb,
2007                                           serial->out_endp->
2008                                           bEndpointAddress & 0x7F),
2009                           serial->tx_data, serial->tx_data_count,
2010                           hso_std_serial_write_bulk_callback, serial);
2011
2012         result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
2013         if (result) {
2014                 dev_warn(&serial->parent->usb->dev,
2015                          "Failed to submit urb - res %d\n", result);
2016                 return result;
2017         }
2018
2019         return count;
2020 }
2021
2022 /* callback after read or write on muxed serial port */
2023 static void ctrl_callback(struct urb *urb)
2024 {
2025         struct hso_serial *serial = urb->context;
2026         struct usb_ctrlrequest *req;
2027         int status = urb->status;
2028
2029         /* sanity check */
2030         if (!serial)
2031                 return;
2032
2033         spin_lock(&serial->serial_lock);
2034         serial->tx_urb_used = 0;
2035         spin_unlock(&serial->serial_lock);
2036         if (status) {
2037                 log_usb_status(status, __func__);
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 (serial->tty)
2057                         tty_wakeup(serial->tty);
2058                 /* response to a write command */
2059                 hso_kick_transmit(serial);
2060         }
2061 }
2062
2063 /* handle RX data for serial port */
2064 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2065 {
2066         struct tty_struct *tty = serial->tty;
2067         int write_length_remaining = 0;
2068         int curr_write_len;
2069         /* Sanity check */
2070         if (urb == NULL || serial == NULL) {
2071                 D1("serial = NULL");
2072                 return -2;
2073         }
2074
2075         /* Push data to tty */
2076         if (tty) {
2077                 write_length_remaining = urb->actual_length -
2078                         serial->curr_rx_urb_offset;
2079                 D1("data to push to tty");
2080                 while (write_length_remaining) {
2081                         if (test_bit(TTY_THROTTLED, &tty->flags))
2082                                 return -1;
2083                         curr_write_len =  tty_insert_flip_string
2084                                 (tty, urb->transfer_buffer +
2085                                  serial->curr_rx_urb_offset,
2086                                  write_length_remaining);
2087                         serial->curr_rx_urb_offset += curr_write_len;
2088                         write_length_remaining -= curr_write_len;
2089                         tty_flip_buffer_push(tty);
2090                 }
2091         }
2092         if (write_length_remaining == 0) {
2093                 serial->curr_rx_urb_offset = 0;
2094                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2095         }
2096         return write_length_remaining;
2097 }
2098
2099
2100 /* Base driver functions */
2101
2102 static void hso_log_port(struct hso_device *hso_dev)
2103 {
2104         char *port_type;
2105         char port_dev[20];
2106
2107         switch (hso_dev->port_spec & HSO_PORT_MASK) {
2108         case HSO_PORT_CONTROL:
2109                 port_type = "Control";
2110                 break;
2111         case HSO_PORT_APP:
2112                 port_type = "Application";
2113                 break;
2114         case HSO_PORT_GPS:
2115                 port_type = "GPS";
2116                 break;
2117         case HSO_PORT_GPS_CONTROL:
2118                 port_type = "GPS control";
2119                 break;
2120         case HSO_PORT_APP2:
2121                 port_type = "Application2";
2122                 break;
2123         case HSO_PORT_PCSC:
2124                 port_type = "PCSC";
2125                 break;
2126         case HSO_PORT_DIAG:
2127                 port_type = "Diagnostic";
2128                 break;
2129         case HSO_PORT_DIAG2:
2130                 port_type = "Diagnostic2";
2131                 break;
2132         case HSO_PORT_MODEM:
2133                 port_type = "Modem";
2134                 break;
2135         case HSO_PORT_NETWORK:
2136                 port_type = "Network";
2137                 break;
2138         default:
2139                 port_type = "Unknown";
2140                 break;
2141         }
2142         if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2143                 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2144         } else
2145                 sprintf(port_dev, "/dev/%s%d", tty_filename,
2146                         dev2ser(hso_dev)->minor);
2147
2148         dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2149                 port_type, port_dev);
2150 }
2151
2152 static int hso_start_net_device(struct hso_device *hso_dev)
2153 {
2154         int i, result = 0;
2155         struct hso_net *hso_net = dev2net(hso_dev);
2156
2157         if (!hso_net)
2158                 return -ENODEV;
2159
2160         /* send URBs for all read buffers */
2161         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2162
2163                 /* Prep a receive URB */
2164                 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2165                                   hso_dev->usb,
2166                                   usb_rcvbulkpipe(hso_dev->usb,
2167                                                   hso_net->in_endp->
2168                                                   bEndpointAddress & 0x7F),
2169                                   hso_net->mux_bulk_rx_buf_pool[i],
2170                                   MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2171                                   hso_net);
2172
2173                 /* Put it out there so the device can send us stuff */
2174                 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2175                                         GFP_NOIO);
2176                 if (result)
2177                         dev_warn(&hso_dev->usb->dev,
2178                                 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2179                                 i, result);
2180         }
2181
2182         return result;
2183 }
2184
2185 static int hso_stop_net_device(struct hso_device *hso_dev)
2186 {
2187         int i;
2188         struct hso_net *hso_net = dev2net(hso_dev);
2189
2190         if (!hso_net)
2191                 return -ENODEV;
2192
2193         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2194                 if (hso_net->mux_bulk_rx_urb_pool[i])
2195                         usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2196
2197         }
2198         if (hso_net->mux_bulk_tx_urb)
2199                 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2200
2201         return 0;
2202 }
2203
2204 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2205 {
2206         int i, result = 0;
2207         struct hso_serial *serial = dev2ser(hso_dev);
2208
2209         if (!serial)
2210                 return -ENODEV;
2211
2212         /* If it is not the MUX port fill in and submit a bulk urb (already
2213          * allocated in hso_serial_start) */
2214         if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2215                 for (i = 0; i < serial->num_rx_urbs; i++) {
2216                         usb_fill_bulk_urb(serial->rx_urb[i],
2217                                           serial->parent->usb,
2218                                           usb_rcvbulkpipe(serial->parent->usb,
2219                                                           serial->in_endp->
2220                                                           bEndpointAddress &
2221                                                           0x7F),
2222                                           serial->rx_data[i],
2223                                           serial->rx_data_length,
2224                                           hso_std_serial_read_bulk_callback,
2225                                           serial);
2226                         result = usb_submit_urb(serial->rx_urb[i], flags);
2227                         if (result) {
2228                                 dev_warn(&serial->parent->usb->dev,
2229                                          "Failed to submit urb - res %d\n",
2230                                          result);
2231                                 break;
2232                         }
2233                 }
2234         } else {
2235                 mutex_lock(&serial->shared_int->shared_int_lock);
2236                 if (!serial->shared_int->use_count) {
2237                         result =
2238                             hso_mux_submit_intr_urb(serial->shared_int,
2239                                                     hso_dev->usb, flags);
2240                 }
2241                 serial->shared_int->use_count++;
2242                 mutex_unlock(&serial->shared_int->shared_int_lock);
2243         }
2244         if (serial->tiocmget)
2245                 tiocmget_submit_urb(serial,
2246                                     serial->tiocmget,
2247                                     serial->parent->usb);
2248         return result;
2249 }
2250
2251 static int hso_stop_serial_device(struct hso_device *hso_dev)
2252 {
2253         int i;
2254         struct hso_serial *serial = dev2ser(hso_dev);
2255         struct hso_tiocmget  *tiocmget;
2256
2257         if (!serial)
2258                 return -ENODEV;
2259
2260         for (i = 0; i < serial->num_rx_urbs; i++) {
2261                 if (serial->rx_urb[i]) {
2262                                 usb_kill_urb(serial->rx_urb[i]);
2263                                 serial->rx_urb_filled[i] = 0;
2264                 }
2265         }
2266         serial->curr_rx_urb_idx = 0;
2267         serial->curr_rx_urb_offset = 0;
2268
2269         if (serial->tx_urb)
2270                 usb_kill_urb(serial->tx_urb);
2271
2272         if (serial->shared_int) {
2273                 mutex_lock(&serial->shared_int->shared_int_lock);
2274                 if (serial->shared_int->use_count &&
2275                     (--serial->shared_int->use_count == 0)) {
2276                         struct urb *urb;
2277
2278                         urb = serial->shared_int->shared_intr_urb;
2279                         if (urb)
2280                                 usb_kill_urb(urb);
2281                 }
2282                 mutex_unlock(&serial->shared_int->shared_int_lock);
2283         }
2284         tiocmget = serial->tiocmget;
2285         if (tiocmget) {
2286                 wake_up_interruptible(&tiocmget->waitq);
2287                 usb_kill_urb(tiocmget->urb);
2288         }
2289
2290         return 0;
2291 }
2292
2293 static void hso_serial_common_free(struct hso_serial *serial)
2294 {
2295         int i;
2296
2297         if (serial->parent->dev)
2298                 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2299
2300         tty_unregister_device(tty_drv, serial->minor);
2301
2302         for (i = 0; i < serial->num_rx_urbs; i++) {
2303                 /* unlink and free RX URB */
2304                 usb_free_urb(serial->rx_urb[i]);
2305                 /* free the RX buffer */
2306                 kfree(serial->rx_data[i]);
2307         }
2308
2309         /* unlink and free TX URB */
2310         usb_free_urb(serial->tx_urb);
2311         kfree(serial->tx_data);
2312 }
2313
2314 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2315                                     int rx_size, int tx_size)
2316 {
2317         struct device *dev;
2318         int minor;
2319         int i;
2320
2321         minor = get_free_serial_index();
2322         if (minor < 0)
2323                 goto exit;
2324
2325         /* register our minor number */
2326         serial->parent->dev = tty_register_device(tty_drv, minor,
2327                                         &serial->parent->interface->dev);
2328         dev = serial->parent->dev;
2329         dev->driver_data = serial->parent;
2330         i = device_create_file(dev, &dev_attr_hsotype);
2331
2332         /* fill in specific data for later use */
2333         serial->minor = minor;
2334         serial->magic = HSO_SERIAL_MAGIC;
2335         spin_lock_init(&serial->serial_lock);
2336         serial->num_rx_urbs = num_urbs;
2337
2338         /* RX, allocate urb and initialize */
2339
2340         /* prepare our RX buffer */
2341         serial->rx_data_length = rx_size;
2342         for (i = 0; i < serial->num_rx_urbs; i++) {
2343                 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2344                 if (!serial->rx_urb[i]) {
2345                         dev_err(dev, "Could not allocate urb?\n");
2346                         goto exit;
2347                 }
2348                 serial->rx_urb[i]->transfer_buffer = NULL;
2349                 serial->rx_urb[i]->transfer_buffer_length = 0;
2350                 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2351                                              GFP_KERNEL);
2352                 if (!serial->rx_data[i]) {
2353                         dev_err(dev, "%s - Out of memory\n", __func__);
2354                         goto exit;
2355                 }
2356         }
2357
2358         /* TX, allocate urb and initialize */
2359         serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2360         if (!serial->tx_urb) {
2361                 dev_err(dev, "Could not allocate urb?\n");
2362                 goto exit;
2363         }
2364         serial->tx_urb->transfer_buffer = NULL;
2365         serial->tx_urb->transfer_buffer_length = 0;
2366         /* prepare our TX buffer */
2367         serial->tx_data_count = 0;
2368         serial->tx_buffer_count = 0;
2369         serial->tx_data_length = tx_size;
2370         serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2371         if (!serial->tx_data) {
2372                 dev_err(dev, "%s - Out of memory", __func__);
2373                 goto exit;
2374         }
2375         serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2376         if (!serial->tx_buffer) {
2377                 dev_err(dev, "%s - Out of memory", __func__);
2378                 goto exit;
2379         }
2380
2381         return 0;
2382 exit:
2383         hso_serial_common_free(serial);
2384         return -1;
2385 }
2386
2387 /* Frees a general hso device */
2388 static void hso_free_device(struct hso_device *hso_dev)
2389 {
2390         kfree(hso_dev);
2391 }
2392
2393 /* Creates a general hso device */
2394 static struct hso_device *hso_create_device(struct usb_interface *intf,
2395                                             int port_spec)
2396 {
2397         struct hso_device *hso_dev;
2398
2399         hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2400         if (!hso_dev)
2401                 return NULL;
2402
2403         hso_dev->port_spec = port_spec;
2404         hso_dev->usb = interface_to_usbdev(intf);
2405         hso_dev->interface = intf;
2406         kref_init(&hso_dev->ref);
2407         hso_dev->mutex = hso_get_free_mutex();
2408         if (!hso_dev->mutex) {
2409                 kfree(hso_dev);
2410                 return NULL;
2411         }
2412         mutex_init(&hso_dev->mutex->mutex);
2413         INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2414         INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2415
2416         return hso_dev;
2417 }
2418
2419 /* Removes a network device in the network device table */
2420 static int remove_net_device(struct hso_device *hso_dev)
2421 {
2422         int i;
2423
2424         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2425                 if (network_table[i] == hso_dev) {
2426                         network_table[i] = NULL;
2427                         break;
2428                 }
2429         }
2430         if (i == HSO_MAX_NET_DEVICES)
2431                 return -1;
2432         return 0;
2433 }
2434
2435 /* Frees our network device */
2436 static void hso_free_net_device(struct hso_device *hso_dev)
2437 {
2438         int i;
2439         struct hso_net *hso_net = dev2net(hso_dev);
2440
2441         if (!hso_net)
2442                 return;
2443
2444         /* start freeing */
2445         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2446                 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2447                 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2448         }
2449         usb_free_urb(hso_net->mux_bulk_tx_urb);
2450         kfree(hso_net->mux_bulk_tx_buf);
2451
2452         remove_net_device(hso_net->parent);
2453
2454         if (hso_net->net) {
2455                 unregister_netdev(hso_net->net);
2456                 free_netdev(hso_net->net);
2457         }
2458         hso_free_mutex(hso_dev->mutex);
2459         hso_free_device(hso_dev);
2460 }
2461
2462 /* initialize the network interface */
2463 static void hso_net_init(struct net_device *net)
2464 {
2465         struct hso_net *hso_net = netdev_priv(net);
2466
2467         D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2468
2469         /* fill in the other fields */
2470         net->open = hso_net_open;
2471         net->stop = hso_net_close;
2472         net->hard_start_xmit = hso_net_start_xmit;
2473         net->tx_timeout = hso_net_tx_timeout;
2474         net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2475         net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2476         net->type = ARPHRD_NONE;
2477         net->mtu = DEFAULT_MTU - 14;
2478         net->tx_queue_len = 10;
2479         SET_ETHTOOL_OPS(net, &ops);
2480
2481         /* and initialize the semaphore */
2482         spin_lock_init(&hso_net->net_lock);
2483 }
2484
2485 /* Adds a network device in the network device table */
2486 static int add_net_device(struct hso_device *hso_dev)
2487 {
2488         int i;
2489
2490         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2491                 if (network_table[i] == NULL) {
2492                         network_table[i] = hso_dev;
2493                         break;
2494                 }
2495         }
2496         if (i == HSO_MAX_NET_DEVICES)
2497                 return -1;
2498         return 0;
2499 }
2500
2501 static int hso_radio_toggle(void *data, enum rfkill_state state)
2502 {
2503         struct hso_device *hso_dev = data;
2504         int enabled = (state == RFKILL_STATE_ON);
2505         int rv;
2506
2507         mutex_lock(&hso_dev->mutex->mutex);
2508         if (hso_dev->usb_gone)
2509                 rv = 0;
2510         else
2511                 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2512                                        enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2513                                        USB_CTRL_SET_TIMEOUT);
2514         mutex_unlock(&hso_dev->mutex->mutex);
2515         return rv;
2516 }
2517
2518 /* Creates and sets up everything for rfkill */
2519 static void hso_create_rfkill(struct hso_device *hso_dev,
2520                              struct usb_interface *interface)
2521 {
2522         struct hso_net *hso_net = dev2net(hso_dev);
2523         struct device *dev = &hso_net->net->dev;
2524         char *rfkn;
2525
2526         hso_net->rfkill = rfkill_allocate(&interface_to_usbdev(interface)->dev,
2527                                  RFKILL_TYPE_WWAN);
2528         if (!hso_net->rfkill) {
2529                 dev_err(dev, "%s - Out of memory\n", __func__);
2530                 return;
2531         }
2532         rfkn = kzalloc(20, GFP_KERNEL);
2533         if (!rfkn) {
2534                 rfkill_free(hso_net->rfkill);
2535                 hso_net->rfkill = NULL;
2536                 dev_err(dev, "%s - Out of memory\n", __func__);
2537                 return;
2538         }
2539         snprintf(rfkn, 20, "hso-%d",
2540                  interface->altsetting->desc.bInterfaceNumber);
2541         hso_net->rfkill->name = rfkn;
2542         hso_net->rfkill->state = RFKILL_STATE_ON;
2543         hso_net->rfkill->data = hso_dev;
2544         hso_net->rfkill->toggle_radio = hso_radio_toggle;
2545         if (rfkill_register(hso_net->rfkill) < 0) {
2546                 kfree(rfkn);
2547                 hso_net->rfkill->name = NULL;
2548                 rfkill_free(hso_net->rfkill);
2549                 hso_net->rfkill = NULL;
2550                 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2551                 return;
2552         }
2553 }
2554
2555 /* Creates our network device */
2556 static struct hso_device *hso_create_net_device(struct usb_interface *interface)
2557 {
2558         int result, i;
2559         struct net_device *net;
2560         struct hso_net *hso_net;
2561         struct hso_device *hso_dev;
2562
2563         hso_dev = hso_create_device(interface, HSO_INTF_MUX | HSO_PORT_NETWORK);
2564         if (!hso_dev)
2565                 return NULL;
2566
2567         /* allocate our network device, then we can put in our private data */
2568         /* call hso_net_init to do the basic initialization */
2569         net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2570         if (!net) {
2571                 dev_err(&interface->dev, "Unable to create ethernet device\n");
2572                 goto exit;
2573         }
2574
2575         hso_net = netdev_priv(net);
2576
2577         hso_dev->port_data.dev_net = hso_net;
2578         hso_net->net = net;
2579         hso_net->parent = hso_dev;
2580
2581         hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2582                                       USB_DIR_IN);
2583         if (!hso_net->in_endp) {
2584                 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2585                 goto exit;
2586         }
2587         hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2588                                        USB_DIR_OUT);
2589         if (!hso_net->out_endp) {
2590                 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2591                 goto exit;
2592         }
2593         SET_NETDEV_DEV(net, &interface->dev);
2594
2595         /* registering our net device */
2596         result = register_netdev(net);
2597         if (result) {
2598                 dev_err(&interface->dev, "Failed to register device\n");
2599                 goto exit;
2600         }
2601
2602         /* start allocating */
2603         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2604                 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2605                 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2606                         dev_err(&interface->dev, "Could not allocate rx urb\n");
2607                         goto exit;
2608                 }
2609                 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2610                                                            GFP_KERNEL);
2611                 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2612                         dev_err(&interface->dev, "Could not allocate rx buf\n");
2613                         goto exit;
2614                 }
2615         }
2616         hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2617         if (!hso_net->mux_bulk_tx_urb) {
2618                 dev_err(&interface->dev, "Could not allocate tx urb\n");
2619                 goto exit;
2620         }
2621         hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2622         if (!hso_net->mux_bulk_tx_buf) {
2623                 dev_err(&interface->dev, "Could not allocate tx buf\n");
2624                 goto exit;
2625         }
2626
2627         add_net_device(hso_dev);
2628
2629         hso_log_port(hso_dev);
2630
2631         hso_create_rfkill(hso_dev, interface);
2632
2633         return hso_dev;
2634 exit:
2635         hso_free_net_device(hso_dev);
2636         return NULL;
2637 }
2638
2639 static void hso_free_tiomget(struct hso_serial *serial)
2640 {
2641         struct hso_tiocmget *tiocmget = serial->tiocmget;
2642         if (tiocmget) {
2643                 kfree(tiocmget);
2644                 if (tiocmget->urb) {
2645                         usb_free_urb(tiocmget->urb);
2646                         tiocmget->urb = NULL;
2647                 }
2648                 serial->tiocmget = NULL;
2649
2650         }
2651 }
2652
2653 /* Frees an AT channel ( goes for both mux and non-mux ) */
2654 static void hso_free_serial_device(struct hso_device *hso_dev)
2655 {
2656         struct hso_serial *serial = dev2ser(hso_dev);
2657
2658         if (!serial)
2659                 return;
2660         set_serial_by_index(serial->minor, NULL);
2661
2662         hso_serial_common_free(serial);
2663
2664         if (serial->shared_int) {
2665                 mutex_lock(&serial->shared_int->shared_int_lock);
2666                 if (--serial->shared_int->ref_count == 0)
2667                         hso_free_shared_int(serial->shared_int);
2668                 else
2669                         mutex_unlock(&serial->shared_int->shared_int_lock);
2670         }
2671         hso_free_tiomget(serial);
2672         kfree(serial);
2673         hso_free_device(hso_dev);
2674 }
2675
2676 /* Creates a bulk AT channel */
2677 static struct hso_device *hso_create_bulk_serial_device(
2678                         struct usb_interface *interface, int port)
2679 {
2680         struct hso_device *hso_dev;
2681         struct hso_serial *serial;
2682         int num_urbs;
2683         struct hso_tiocmget *tiocmget;
2684
2685         hso_dev = hso_create_device(interface, port);
2686         if (!hso_dev)
2687                 return NULL;
2688
2689         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2690         if (!serial)
2691                 goto exit;
2692
2693         serial->parent = hso_dev;
2694         hso_dev->port_data.dev_serial = serial;
2695
2696         if (port & HSO_PORT_MODEM) {
2697                 num_urbs = 2;
2698                 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2699                                            GFP_KERNEL);
2700                 /* it isn't going to break our heart if serial->tiocmget
2701                  *  allocation fails don't bother checking this.
2702                  */
2703                 if (serial->tiocmget) {
2704                         tiocmget = serial->tiocmget;
2705                         tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2706                         if (tiocmget->urb) {
2707                                 mutex_init(&tiocmget->mutex);
2708                                 init_waitqueue_head(&tiocmget->waitq);
2709                                 tiocmget->endp = hso_get_ep(
2710                                         interface,
2711                                         USB_ENDPOINT_XFER_INT,
2712                                         USB_DIR_IN);
2713                         } else
2714                                 hso_free_tiomget(serial);
2715                 }
2716         }
2717         else
2718                 num_urbs = 1;
2719
2720         if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2721                                      BULK_URB_TX_SIZE))
2722                 goto exit;
2723
2724         serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2725                                      USB_DIR_IN);
2726         if (!serial->in_endp) {
2727                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2728                 goto exit2;
2729         }
2730
2731         if (!
2732             (serial->out_endp =
2733              hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2734                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2735                 goto exit2;
2736         }
2737
2738         serial->write_data = hso_std_serial_write_data;
2739
2740         /* and record this serial */
2741         set_serial_by_index(serial->minor, serial);
2742
2743         /* setup the proc dirs and files if needed */
2744         hso_log_port(hso_dev);
2745
2746         /* done, return it */
2747         return hso_dev;
2748
2749 exit2:
2750         hso_serial_common_free(serial);
2751 exit:
2752         hso_free_tiomget(serial);
2753         kfree(serial);
2754         hso_free_device(hso_dev);
2755         return NULL;
2756 }
2757
2758 /* Creates a multiplexed AT channel */
2759 static
2760 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2761                                                 int port,
2762                                                 struct hso_shared_int *mux)
2763 {
2764         struct hso_device *hso_dev;
2765         struct hso_serial *serial;
2766         int port_spec;
2767
2768         port_spec = HSO_INTF_MUX;
2769         port_spec &= ~HSO_PORT_MASK;
2770
2771         port_spec |= hso_mux_to_port(port);
2772         if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2773                 return NULL;
2774
2775         hso_dev = hso_create_device(interface, port_spec);
2776         if (!hso_dev)
2777                 return NULL;
2778
2779         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2780         if (!serial)
2781                 goto exit;
2782
2783         hso_dev->port_data.dev_serial = serial;
2784         serial->parent = hso_dev;
2785
2786         if (hso_serial_common_create
2787             (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2788                 goto exit;
2789
2790         serial->tx_data_length--;
2791         serial->write_data = hso_mux_serial_write_data;
2792
2793         serial->shared_int = mux;
2794         mutex_lock(&serial->shared_int->shared_int_lock);
2795         serial->shared_int->ref_count++;
2796         mutex_unlock(&serial->shared_int->shared_int_lock);
2797
2798         /* and record this serial */
2799         set_serial_by_index(serial->minor, serial);
2800
2801         /* setup the proc dirs and files if needed */
2802         hso_log_port(hso_dev);
2803
2804         /* done, return it */
2805         return hso_dev;
2806
2807 exit:
2808         if (serial) {
2809                 tty_unregister_device(tty_drv, serial->minor);
2810                 kfree(serial);
2811         }
2812         if (hso_dev)
2813                 hso_free_device(hso_dev);
2814         return NULL;
2815
2816 }
2817
2818 static void hso_free_shared_int(struct hso_shared_int *mux)
2819 {
2820         usb_free_urb(mux->shared_intr_urb);
2821         kfree(mux->shared_intr_buf);
2822         mutex_unlock(&mux->shared_int_lock);
2823         kfree(mux);
2824 }
2825
2826 static
2827 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2828 {
2829         struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2830
2831         if (!mux)
2832                 return NULL;
2833
2834         mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2835                                     USB_DIR_IN);
2836         if (!mux->intr_endp) {
2837                 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2838                 goto exit;
2839         }
2840
2841         mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2842         if (!mux->shared_intr_urb) {
2843                 dev_err(&interface->dev, "Could not allocate intr urb?");
2844                 goto exit;
2845         }
2846         mux->shared_intr_buf = kzalloc(mux->intr_endp->wMaxPacketSize,
2847                                        GFP_KERNEL);
2848         if (!mux->shared_intr_buf) {
2849                 dev_err(&interface->dev, "Could not allocate intr buf?");
2850                 goto exit;
2851         }
2852
2853         mutex_init(&mux->shared_int_lock);
2854
2855         return mux;
2856
2857 exit:
2858         kfree(mux->shared_intr_buf);
2859         usb_free_urb(mux->shared_intr_urb);
2860         kfree(mux);
2861         return NULL;
2862 }
2863
2864 /* Gets the port spec for a certain interface */
2865 static int hso_get_config_data(struct usb_interface *interface)
2866 {
2867         struct usb_device *usbdev = interface_to_usbdev(interface);
2868         u8 config_data[17];
2869         u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2870         s32 result;
2871
2872         if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2873                             0x86, 0xC0, 0, 0, config_data, 17,
2874                             USB_CTRL_SET_TIMEOUT) != 0x11) {
2875                 return -EIO;
2876         }
2877
2878         switch (config_data[if_num]) {
2879         case 0x0:
2880                 result = 0;
2881                 break;
2882         case 0x1:
2883                 result = HSO_PORT_DIAG;
2884                 break;
2885         case 0x2:
2886                 result = HSO_PORT_GPS;
2887                 break;
2888         case 0x3:
2889                 result = HSO_PORT_GPS_CONTROL;
2890                 break;
2891         case 0x4:
2892                 result = HSO_PORT_APP;
2893                 break;
2894         case 0x5:
2895                 result = HSO_PORT_APP2;
2896                 break;
2897         case 0x6:
2898                 result = HSO_PORT_CONTROL;
2899                 break;
2900         case 0x7:
2901                 result = HSO_PORT_NETWORK;
2902                 break;
2903         case 0x8:
2904                 result = HSO_PORT_MODEM;
2905                 break;
2906         case 0x9:
2907                 result = HSO_PORT_MSD;
2908                 break;
2909         case 0xa:
2910                 result = HSO_PORT_PCSC;
2911                 break;
2912         case 0xb:
2913                 result = HSO_PORT_VOICE;
2914                 break;
2915         default:
2916                 result = 0;
2917         }
2918
2919         if (result)
2920                 result |= HSO_INTF_BULK;
2921
2922         if (config_data[16] & 0x1)
2923                 result |= HSO_INFO_CRC_BUG;
2924
2925         return result;
2926 }
2927
2928 /* called once for each interface upon device insertion */
2929 static int hso_probe(struct usb_interface *interface,
2930                      const struct usb_device_id *id)
2931 {
2932         int mux, i, if_num, port_spec;
2933         unsigned char port_mask;
2934         struct hso_device *hso_dev = NULL;
2935         struct hso_shared_int *shared_int;
2936         struct hso_device *tmp_dev = NULL;
2937
2938         if_num = interface->altsetting->desc.bInterfaceNumber;
2939
2940         /* Get the interface/port specification from either driver_info or from
2941          * the device itself */
2942         if (id->driver_info)
2943                 port_spec = ((u32 *)(id->driver_info))[if_num];
2944         else
2945                 port_spec = hso_get_config_data(interface);
2946
2947         if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2948                 dev_err(&interface->dev, "Not our interface\n");
2949                 return -ENODEV;
2950         }
2951         /* Check if we need to switch to alt interfaces prior to port
2952          * configuration */
2953         if (interface->num_altsetting > 1)
2954                 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2955         interface->needs_remote_wakeup = 1;
2956
2957         /* Allocate new hso device(s) */
2958         switch (port_spec & HSO_INTF_MASK) {
2959         case HSO_INTF_MUX:
2960                 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2961                         /* Create the network device */
2962                         if (!disable_net) {
2963                                 hso_dev = hso_create_net_device(interface);
2964                                 if (!hso_dev)
2965                                         goto exit;
2966                                 tmp_dev = hso_dev;
2967                         }
2968                 }
2969
2970                 if (hso_get_mux_ports(interface, &port_mask))
2971                         /* TODO: de-allocate everything */
2972                         goto exit;
2973
2974                 shared_int = hso_create_shared_int(interface);
2975                 if (!shared_int)
2976                         goto exit;
2977
2978                 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2979                         if (port_mask & i) {
2980                                 hso_dev = hso_create_mux_serial_device(
2981                                                 interface, i, shared_int);
2982                                 if (!hso_dev)
2983                                         goto exit;
2984                         }
2985                 }
2986
2987                 if (tmp_dev)
2988                         hso_dev = tmp_dev;
2989                 break;
2990
2991         case HSO_INTF_BULK:
2992                 /* It's a regular bulk interface */
2993                 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK)
2994                     && !disable_net)
2995                         hso_dev = hso_create_net_device(interface);
2996                 else
2997                         hso_dev =
2998                             hso_create_bulk_serial_device(interface, port_spec);
2999                 if (!hso_dev)
3000                         goto exit;
3001                 break;
3002         default:
3003                 goto exit;
3004         }
3005
3006         usb_driver_claim_interface(&hso_driver, interface, hso_dev);
3007
3008         /* save our data pointer in this device */
3009         usb_set_intfdata(interface, hso_dev);
3010
3011         /* done */
3012         return 0;
3013 exit:
3014         hso_free_interface(interface);
3015         return -ENODEV;
3016 }
3017
3018 /* device removed, cleaning up */
3019 static void hso_disconnect(struct usb_interface *interface)
3020 {
3021         hso_free_interface(interface);
3022
3023         /* remove reference of our private data */
3024         usb_set_intfdata(interface, NULL);
3025
3026         usb_driver_release_interface(&hso_driver, interface);
3027 }
3028
3029 static void async_get_intf(struct work_struct *data)
3030 {
3031         struct hso_device *hso_dev =
3032             container_of(data, struct hso_device, async_get_intf);
3033         usb_autopm_get_interface(hso_dev->interface);
3034 }
3035
3036 static void async_put_intf(struct work_struct *data)
3037 {
3038         struct hso_device *hso_dev =
3039             container_of(data, struct hso_device, async_put_intf);
3040         usb_autopm_put_interface(hso_dev->interface);
3041 }
3042
3043 static int hso_get_activity(struct hso_device *hso_dev)
3044 {
3045         if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3046                 if (!hso_dev->is_active) {
3047                         hso_dev->is_active = 1;
3048                         schedule_work(&hso_dev->async_get_intf);
3049                 }
3050         }
3051
3052         if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3053                 return -EAGAIN;
3054
3055         usb_mark_last_busy(hso_dev->usb);
3056
3057         return 0;
3058 }
3059
3060 static int hso_put_activity(struct hso_device *hso_dev)
3061 {
3062         if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3063                 if (hso_dev->is_active) {
3064                         hso_dev->is_active = 0;
3065                         schedule_work(&hso_dev->async_put_intf);
3066                         return -EAGAIN;
3067                 }
3068         }
3069         hso_dev->is_active = 0;
3070         return 0;
3071 }
3072
3073 /* called by kernel when we need to suspend device */
3074 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3075 {
3076         int i, result;
3077
3078         /* Stop all serial ports */
3079         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3080                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3081                         result = hso_stop_serial_device(serial_table[i]);
3082                         if (result)
3083                                 goto out;
3084                 }
3085         }
3086
3087         /* Stop all network ports */
3088         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3089                 if (network_table[i] &&
3090                     (network_table[i]->interface == iface)) {
3091                         result = hso_stop_net_device(network_table[i]);
3092                         if (result)
3093                                 goto out;
3094                 }
3095         }
3096
3097 out:
3098         return 0;
3099 }
3100
3101 /* called by kernel when we need to resume device */
3102 static int hso_resume(struct usb_interface *iface)
3103 {
3104         int i, result = 0;
3105         struct hso_net *hso_net;
3106
3107         /* Start all serial ports */
3108         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3109                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3110                         if (dev2ser(serial_table[i])->open_count) {
3111                                 result =
3112                                     hso_start_serial_device(serial_table[i], GFP_NOIO);
3113                                 hso_kick_transmit(dev2ser(serial_table[i]));
3114                                 if (result)
3115                                         goto out;
3116                         }
3117                 }
3118         }
3119
3120         /* Start all network ports */
3121         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3122                 if (network_table[i] &&
3123                     (network_table[i]->interface == iface)) {
3124                         hso_net = dev2net(network_table[i]);
3125                         if (hso_net->flags & IFF_UP) {
3126                                 /* First transmit any lingering data,
3127                                    then restart the device. */
3128                                 if (hso_net->skb_tx_buf) {
3129                                         dev_dbg(&iface->dev,
3130                                                 "Transmitting"
3131                                                 " lingering data\n");
3132                                         hso_net_start_xmit(hso_net->skb_tx_buf,
3133                                                            hso_net->net);
3134                                         hso_net->skb_tx_buf = NULL;
3135                                 }
3136                                 result = hso_start_net_device(network_table[i]);
3137                                 if (result)
3138                                         goto out;
3139                         }
3140                 }
3141         }
3142
3143 out:
3144         return result;
3145 }
3146
3147 static void hso_serial_ref_free(struct kref *ref)
3148 {
3149         struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3150
3151         hso_free_serial_device(hso_dev);
3152 }
3153
3154 static void hso_free_interface(struct usb_interface *interface)
3155 {
3156         struct hso_serial *hso_dev;
3157         int i;
3158         struct mutex *hso_mutex = NULL;
3159         int    refcnt = 1;
3160
3161         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3162                 if (serial_table[i]
3163                     && (serial_table[i]->interface == interface)) {
3164                         hso_dev = dev2ser(serial_table[i]);
3165                         if (hso_dev->tty)
3166                                 tty_hangup(hso_dev->tty);
3167                         hso_mutex = &hso_dev->parent->mutex->mutex;
3168                         mutex_lock(hso_mutex);
3169                         hso_dev->parent->usb_gone = 1;
3170                         refcnt = kref_put(&serial_table[i]->ref,
3171                                         hso_serial_ref_free);
3172                         mutex_unlock(hso_mutex);
3173                 }
3174         }
3175
3176         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3177                 if (network_table[i]
3178                     && (network_table[i]->interface == interface)) {
3179                         struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3180                         /* hso_stop_net_device doesn't stop the net queue since
3181                          * traffic needs to start it again when suspended */
3182                         netif_stop_queue(dev2net(network_table[i])->net);
3183                         hso_stop_net_device(network_table[i]);
3184                         cancel_work_sync(&network_table[i]->async_put_intf);
3185                         cancel_work_sync(&network_table[i]->async_get_intf);
3186                         if (rfk)
3187                                 rfkill_unregister(rfk);
3188                         hso_free_net_device(network_table[i]);
3189                 }
3190         }
3191         if (refcnt == 0)
3192                 hso_free_mutex(container_of(hso_mutex,
3193                                             struct hso_mutex_t, mutex));
3194 }
3195
3196 /* Helper functions */
3197
3198 /* Get the endpoint ! */
3199 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3200                                                   int type, int dir)
3201 {
3202         int i;
3203         struct usb_host_interface *iface = intf->cur_altsetting;
3204         struct usb_endpoint_descriptor *endp;
3205
3206         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3207                 endp = &iface->endpoint[i].desc;
3208                 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3209                     ((endp->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == type))
3210                         return endp;
3211         }
3212
3213         return NULL;
3214 }
3215
3216 /* Get the byte that describes which ports are enabled */
3217 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3218 {
3219         int i;
3220         struct usb_host_interface *iface = intf->cur_altsetting;
3221
3222         if (iface->extralen == 3) {
3223                 *ports = iface->extra[2];
3224                 return 0;
3225         }
3226
3227         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3228                 if (iface->endpoint[i].extralen == 3) {
3229                         *ports = iface->endpoint[i].extra[2];
3230                         return 0;
3231                 }
3232         }
3233
3234         return -1;
3235 }
3236
3237 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3238 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3239                                    struct usb_device *usb, gfp_t gfp)
3240 {
3241         int result;
3242
3243         usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3244                          usb_rcvintpipe(usb,
3245                                 shared_int->intr_endp->bEndpointAddress & 0x7F),
3246                          shared_int->shared_intr_buf,
3247                          shared_int->intr_endp->wMaxPacketSize,
3248                          intr_callback, shared_int,
3249                          shared_int->intr_endp->bInterval);
3250
3251         result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3252         if (result)
3253                 dev_warn(&usb->dev, "%s failed mux_intr_urb %d", __func__,
3254                         result);
3255
3256         return result;
3257 }
3258
3259 /* operations setup of the serial interface */
3260 static const struct tty_operations hso_serial_ops = {
3261         .open = hso_serial_open,
3262         .close = hso_serial_close,
3263         .write = hso_serial_write,
3264         .write_room = hso_serial_write_room,
3265         .ioctl = hso_serial_ioctl,
3266         .set_termios = hso_serial_set_termios,
3267         .chars_in_buffer = hso_serial_chars_in_buffer,
3268         .tiocmget = hso_serial_tiocmget,
3269         .tiocmset = hso_serial_tiocmset,
3270         .unthrottle = hso_unthrottle
3271 };
3272
3273 static struct usb_driver hso_driver = {
3274         .name = driver_name,
3275         .probe = hso_probe,
3276         .disconnect = hso_disconnect,
3277         .id_table = hso_ids,
3278         .suspend = hso_suspend,
3279         .resume = hso_resume,
3280         .supports_autosuspend = 1,
3281 };
3282
3283 static int __init hso_init(void)
3284 {
3285         int i;
3286         int result;
3287
3288         /* put it in the log */
3289         printk(KERN_INFO "hso: %s\n", version);
3290
3291         /* Initialise the serial table semaphore and table */
3292         spin_lock_init(&serial_table_lock);
3293         spin_lock_init(&hso_mutex_lock);
3294         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3295                 serial_table[i] = NULL;
3296
3297         /* allocate our driver using the proper amount of supported minors */
3298         tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3299         if (!tty_drv)
3300                 return -ENOMEM;
3301
3302         /* fill in all needed values */
3303         tty_drv->magic = TTY_DRIVER_MAGIC;
3304         tty_drv->owner = THIS_MODULE;
3305         tty_drv->driver_name = driver_name;
3306         tty_drv->name = tty_filename;
3307
3308         /* if major number is provided as parameter, use that one */
3309         if (tty_major)
3310                 tty_drv->major = tty_major;
3311
3312         tty_drv->minor_start = 0;
3313         tty_drv->num = HSO_SERIAL_TTY_MINORS;
3314         tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3315         tty_drv->subtype = SERIAL_TYPE_NORMAL;
3316         tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3317         tty_drv->init_termios = tty_std_termios;
3318         tty_drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
3319         tty_drv->termios = hso_serial_termios;
3320         tty_drv->termios_locked = hso_serial_termios_locked;
3321         tty_set_operations(tty_drv, &hso_serial_ops);
3322
3323         /* register the tty driver */
3324         result = tty_register_driver(tty_drv);
3325         if (result) {
3326                 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3327                         __func__, result);
3328                 return result;
3329         }
3330
3331         /* register this module as an usb driver */
3332         result = usb_register(&hso_driver);
3333         if (result) {
3334                 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3335                         result);
3336                 /* cleanup serial interface */
3337                 tty_unregister_driver(tty_drv);
3338                 return result;
3339         }
3340
3341         /* done */
3342         return 0;
3343 }
3344
3345 static void __exit hso_exit(void)
3346 {
3347         printk(KERN_INFO "hso: unloaded\n");
3348
3349         tty_unregister_driver(tty_drv);
3350         /* deregister the usb driver */
3351         usb_deregister(&hso_driver);
3352 }
3353
3354 /* Module definitions */
3355 module_init(hso_init);
3356 module_exit(hso_exit);
3357
3358 MODULE_AUTHOR(MOD_AUTHOR);
3359 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3360 MODULE_LICENSE(MOD_LICENSE);
3361 MODULE_INFO(Version, DRIVER_VERSION);
3362
3363 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3364 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3365 module_param(debug, int, S_IRUGO | S_IWUSR);
3366
3367 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3368 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3369 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3370
3371 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3372 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3373 module_param(disable_net, int, S_IRUGO | S_IWUSR);