drivers/net/usb/hso.c

   1 /******************************************************************************
   2  *
   3  * Driver for Option High Speed Mobile Devices.
   4  *
   5  *  Copyright (C) 2008 Option International
   6  *                     Filip Aben <f.aben@option.com>
   7  *                     Denis Joseph Barrow <d.barow@option.com>
   8  *                     Jan Dumon <j.dumon@option.com>
   9  *  Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
  10  *                      <ajb@spheresystems.co.uk>
  11  *  Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
  12  *  Copyright (C) 2008 Novell, Inc.
  13  *
  14  *  This program is free software; you can redistribute it and/or modify
  15  *  it under the terms of the GNU General Public License version 2 as
  16  *  published by the Free Software Foundation.
  17  *
  18  *  This program is distributed in the hope that it will be useful,
  19  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  *  GNU General Public License for more details.
  22  *
  23  *  You should have received a copy of the GNU General Public License
  24  *  along with this program; if not, write to the Free Software
  25  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  26  *  USA
  27  *
  28  *
  29  *****************************************************************************/
  30
  31 /******************************************************************************
  32  *
  33  * Description of the device:
  34  *
  35  * Interface 0: Contains the IP network interface on the bulk end points.
  36  *              The multiplexed serial ports are using the interrupt and
  37  *              control endpoints.
  38  *              Interrupt contains a bitmap telling which multiplexed
  39  *              serialport needs servicing.
  40  *
  41  * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
  42  *              port is opened, as this have a huge impact on the network port
  43  *              throughput.
  44  *
  45  * Interface 2: Standard modem interface - circuit switched interface, this
  46  *              can be used to make a standard ppp connection however it
  47  *              should not be used in conjunction with the IP network interface
  48  *              enabled for USB performance reasons i.e. if using this set
  49  *              ideally disable_net=1.
  50  *
  51  *****************************************************************************/
  52
  53 #include <linux/sched.h>
  54 #include <linux/slab.h>
  55 #include <linux/init.h>
  56 #include <linux/delay.h>
  57 #include <linux/netdevice.h>
  58 #include <linux/module.h>
  59 #include <linux/ethtool.h>
  60 #include <linux/usb.h>
  61 #include <linux/timer.h>
  62 #include <linux/tty.h>
  63 #include <linux/tty_driver.h>
  64 #include <linux/tty_flip.h>
  65 #include <linux/kmod.h>
  66 #include <linux/rfkill.h>
  67 #include <linux/ip.h>
  68 #include <linux/uaccess.h>
  69 #include <linux/usb/cdc.h>
  70 #include <net/arp.h>
  71 #include <asm/byteorder.h>
  72 #include <linux/serial_core.h>
  73 #include <linux/serial.h>
  74
  75
  76 #define DRIVER_VERSION                  "1.2"
  77 #define MOD_AUTHOR                      "Option Wireless"
  78 #define MOD_DESCRIPTION                 "USB High Speed Option driver"
  79 #define MOD_LICENSE                     "GPL"
  80
  81 #define HSO_MAX_NET_DEVICES             10
  82 #define HSO__MAX_MTU                    2048
  83 #define DEFAULT_MTU                     1500
  84 #define DEFAULT_MRU                     1500
  85
  86 #define CTRL_URB_RX_SIZE                1024
  87 #define CTRL_URB_TX_SIZE                64
  88
  89 #define BULK_URB_RX_SIZE                4096
  90 #define BULK_URB_TX_SIZE                8192
  91
  92 #define MUX_BULK_RX_BUF_SIZE            HSO__MAX_MTU
  93 #define MUX_BULK_TX_BUF_SIZE            HSO__MAX_MTU
  94 #define MUX_BULK_RX_BUF_COUNT           4
  95 #define USB_TYPE_OPTION_VENDOR          0x20
  96
  97 /* These definitions are used with the struct hso_net flags element */
  98 /* - use *_bit operations on it. (bit indices not values.) */
  99 #define HSO_NET_RUNNING                 0
 100
 101 #define HSO_NET_TX_TIMEOUT              (HZ*10)
 102
 103 #define HSO_SERIAL_MAGIC                0x48534f31
 104
 105 /* Number of ttys to handle */
 106 #define HSO_SERIAL_TTY_MINORS           256
 107
 108 #define MAX_RX_URBS                     2
 109
 110 static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty)
 111 {
 112         if (tty)
 113                 return tty->driver_data;
 114         return NULL;
 115 }
 116
 117 /*****************************************************************************/
 118 /* Debugging functions                                                       */
 119 /*****************************************************************************/
 120 #define D__(lvl_, fmt, arg...)                          \
 121         do {                                            \
 122                 printk(lvl_ "[%d:%s]: " fmt "\n",       \
 123                        __LINE__, __func__, ## arg);     \
 124         } while (0)
 125
 126 #define D_(lvl, args...)                                \
 127         do {                                            \
 128                 if (lvl & debug)                        \
 129                         D__(KERN_INFO, args);           \
 130         } while (0)
 131
 132 #define D1(args...)     D_(0x01, ##args)
 133 #define D2(args...)     D_(0x02, ##args)
 134 #define D3(args...)     D_(0x04, ##args)
 135 #define D4(args...)     D_(0x08, ##args)
 136 #define D5(args...)     D_(0x10, ##args)
 137
 138 /*****************************************************************************/
 139 /* Enumerators                                                               */
 140 /*****************************************************************************/
 141 enum pkt_parse_state {
 142         WAIT_IP,
 143         WAIT_DATA,
 144         WAIT_SYNC
 145 };
 146
 147 /*****************************************************************************/
 148 /* Structs                                                                   */
 149 /*****************************************************************************/
 150
 151 struct hso_shared_int {
 152         struct usb_endpoint_descriptor *intr_endp;
 153         void *shared_intr_buf;
 154         struct urb *shared_intr_urb;
 155         struct usb_device *usb;
 156         int use_count;
 157         int ref_count;
 158         struct mutex shared_int_lock;
 159 };
 160
 161 struct hso_net {
 162         struct hso_device *parent;
 163         struct net_device *net;
 164         struct rfkill *rfkill;
 165
 166         struct usb_endpoint_descriptor *in_endp;
 167         struct usb_endpoint_descriptor *out_endp;
 168
 169         struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
 170         struct urb *mux_bulk_tx_urb;
 171         void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
 172         void *mux_bulk_tx_buf;
 173
 174         struct sk_buff *skb_rx_buf;
 175         struct sk_buff *skb_tx_buf;
 176
 177         enum pkt_parse_state rx_parse_state;
 178         spinlock_t net_lock;
 179
 180         unsigned short rx_buf_size;
 181         unsigned short rx_buf_missing;
 182         struct iphdr rx_ip_hdr;
 183
 184         unsigned long flags;
 185 };
 186
 187 enum rx_ctrl_state{
 188         RX_IDLE,
 189         RX_SENT,
 190         RX_PENDING
 191 };
 192
 193 #define BM_REQUEST_TYPE (0xa1)
 194 #define B_NOTIFICATION  (0x20)
 195 #define W_VALUE         (0x0)
 196 #define W_INDEX         (0x2)
 197 #define W_LENGTH        (0x2)
 198
 199 #define B_OVERRUN       (0x1<<6)
 200 #define B_PARITY        (0x1<<5)
 201 #define B_FRAMING       (0x1<<4)
 202 #define B_RING_SIGNAL   (0x1<<3)
 203 #define B_BREAK         (0x1<<2)
 204 #define B_TX_CARRIER    (0x1<<1)
 205 #define B_RX_CARRIER    (0x1<<0)
 206
 207 struct hso_serial_state_notification {
 208         u8 bmRequestType;
 209         u8 bNotification;
 210         u16 wValue;
 211         u16 wIndex;
 212         u16 wLength;
 213         u16 UART_state_bitmap;
 214 } __attribute__((packed));
 215
 216 struct hso_tiocmget {
 217         struct mutex mutex;
 218         wait_queue_head_t waitq;
 219         int    intr_completed;
 220         struct usb_endpoint_descriptor *endp;
 221         struct urb *urb;
 222         struct hso_serial_state_notification serial_state_notification;
 223         u16    prev_UART_state_bitmap;
 224         struct uart_icount icount;
 225 };
 226
 227
 228 struct hso_serial {
 229         struct hso_device *parent;
 230         int magic;
 231         u8 minor;
 232
 233         struct hso_shared_int *shared_int;
 234
 235         /* rx/tx urb could be either a bulk urb or a control urb depending
 236            on which serial port it is used on. */
 237         struct urb *rx_urb[MAX_RX_URBS];
 238         u8 num_rx_urbs;
 239         u8 *rx_data[MAX_RX_URBS];
 240         u16 rx_data_length;     /* should contain allocated length */
 241
 242         struct urb *tx_urb;
 243         u8 *tx_data;
 244         u8 *tx_buffer;
 245         u16 tx_data_length;     /* should contain allocated length */
 246         u16 tx_data_count;
 247         u16 tx_buffer_count;
 248         struct usb_ctrlrequest ctrl_req_tx;
 249         struct usb_ctrlrequest ctrl_req_rx;
 250
 251         struct usb_endpoint_descriptor *in_endp;
 252         struct usb_endpoint_descriptor *out_endp;
 253
 254         enum rx_ctrl_state rx_state;
 255         u8 rts_state;
 256         u8 dtr_state;
 257         unsigned tx_urb_used:1;
 258
 259         /* from usb_serial_port */
 260         struct tty_struct *tty;
 261         int open_count;
 262         spinlock_t serial_lock;
 263
 264         int (*write_data) (struct hso_serial *serial);
 265         struct hso_tiocmget  *tiocmget;
 266         /* Hacks required to get flow control
 267          * working on the serial receive buffers
 268          * so as not to drop characters on the floor.
 269          */
 270         int  curr_rx_urb_idx;
 271         u16  curr_rx_urb_offset;
 272         u8   rx_urb_filled[MAX_RX_URBS];
 273         struct tasklet_struct unthrottle_tasklet;
 274         struct work_struct    retry_unthrottle_workqueue;
 275 };
 276
 277 struct hso_device {
 278         union {
 279                 struct hso_serial *dev_serial;
 280                 struct hso_net *dev_net;
 281         } port_data;
 282
 283         u32 port_spec;
 284
 285         u8 is_active;
 286         u8 usb_gone;
 287         struct work_struct async_get_intf;
 288         struct work_struct async_put_intf;
 289         struct work_struct reset_device;
 290
 291         struct usb_device *usb;
 292         struct usb_interface *interface;
 293
 294         struct device *dev;
 295         struct kref ref;
 296         struct mutex mutex;
 297 };
 298
 299 /* Type of interface */
 300 #define HSO_INTF_MASK           0xFF00
 301 #define HSO_INTF_MUX            0x0100
 302 #define HSO_INTF_BULK           0x0200
 303
 304 /* Type of port */
 305 #define HSO_PORT_MASK           0xFF
 306 #define HSO_PORT_NO_PORT        0x0
 307 #define HSO_PORT_CONTROL        0x1
 308 #define HSO_PORT_APP            0x2
 309 #define HSO_PORT_GPS            0x3
 310 #define HSO_PORT_PCSC           0x4
 311 #define HSO_PORT_APP2           0x5
 312 #define HSO_PORT_GPS_CONTROL    0x6
 313 #define HSO_PORT_MSD            0x7
 314 #define HSO_PORT_VOICE          0x8
 315 #define HSO_PORT_DIAG2          0x9
 316 #define HSO_PORT_DIAG           0x10
 317 #define HSO_PORT_MODEM          0x11
 318 #define HSO_PORT_NETWORK        0x12
 319
 320 /* Additional device info */
 321 #define HSO_INFO_MASK           0xFF000000
 322 #define HSO_INFO_CRC_BUG        0x01000000
 323
 324 /*****************************************************************************/
 325 /* Prototypes                                                                */
 326 /*****************************************************************************/
 327 /* Serial driver functions */
 328 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
 329                                unsigned int set, unsigned int clear);
 330 static void ctrl_callback(struct urb *urb);
 331 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
 332 static void hso_kick_transmit(struct hso_serial *serial);
 333 /* Helper functions */
 334 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
 335                                    struct usb_device *usb, gfp_t gfp);
 336 static void handle_usb_error(int status, const char *function,
 337                              struct hso_device *hso_dev);
 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 static void reset_device(struct work_struct *data);
 356 /*****************************************************************************/
 357 /* Helping functions                                                         */
 358 /*****************************************************************************/
 359
 360 /* #define DEBUG */
 361
 362 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
 363 {
 364         return hso_dev->port_data.dev_net;
 365 }
 366
 367 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
 368 {
 369         return hso_dev->port_data.dev_serial;
 370 }
 371
 372 /* Debugging functions */
 373 #ifdef DEBUG
 374 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
 375                      unsigned int len)
 376 {
 377         static char name[255];
 378
 379         sprintf(name, "hso[%d:%s]", line_count, func_name);
 380         print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
 381 }
 382
 383 #define DUMP(buf_, len_)        \
 384         dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
 385
 386 #define DUMP1(buf_, len_)                       \
 387         do {                                    \
 388                 if (0x01 & debug)               \
 389                         DUMP(buf_, len_);       \
 390         } while (0)
 391 #else
 392 #define DUMP(buf_, len_)
 393 #define DUMP1(buf_, len_)
 394 #endif
 395
 396 /* module parameters */
 397 static int debug;
 398 static int tty_major;
 399 static int disable_net;
 400
 401 /* driver info */
 402 static const char driver_name[] = "hso";
 403 static const char tty_filename[] = "ttyHS";
 404 static const char *version = __FILE__ ": " DRIVER_VERSION " " MOD_AUTHOR;
 405 /* the usb driver itself (registered in hso_init) */
 406 static struct usb_driver hso_driver;
 407 /* serial structures */
 408 static struct tty_driver *tty_drv;
 409 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
 410 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
 411 static spinlock_t serial_table_lock;
 412
 413 static const s32 default_port_spec[] = {
 414         HSO_INTF_MUX | HSO_PORT_NETWORK,
 415         HSO_INTF_BULK | HSO_PORT_DIAG,
 416         HSO_INTF_BULK | HSO_PORT_MODEM,
 417         0
 418 };
 419
 420 static const s32 icon321_port_spec[] = {
 421         HSO_INTF_MUX | HSO_PORT_NETWORK,
 422         HSO_INTF_BULK | HSO_PORT_DIAG2,
 423         HSO_INTF_BULK | HSO_PORT_MODEM,
 424         HSO_INTF_BULK | HSO_PORT_DIAG,
 425         0
 426 };
 427
 428 #define default_port_device(vendor, product)    \
 429         USB_DEVICE(vendor, product),    \
 430                 .driver_info = (kernel_ulong_t)default_port_spec
 431
 432 #define icon321_port_device(vendor, product)    \
 433         USB_DEVICE(vendor, product),    \
 434                 .driver_info = (kernel_ulong_t)icon321_port_spec
 435
 436 /* list of devices we support */
 437 static const struct usb_device_id hso_ids[] = {
 438         {default_port_device(0x0af0, 0x6711)},
 439         {default_port_device(0x0af0, 0x6731)},
 440         {default_port_device(0x0af0, 0x6751)},
 441         {default_port_device(0x0af0, 0x6771)},
 442         {default_port_device(0x0af0, 0x6791)},
 443         {default_port_device(0x0af0, 0x6811)},
 444         {default_port_device(0x0af0, 0x6911)},
 445         {default_port_device(0x0af0, 0x6951)},
 446         {default_port_device(0x0af0, 0x6971)},
 447         {default_port_device(0x0af0, 0x7011)},
 448         {default_port_device(0x0af0, 0x7031)},
 449         {default_port_device(0x0af0, 0x7051)},
 450         {default_port_device(0x0af0, 0x7071)},
 451         {default_port_device(0x0af0, 0x7111)},
 452         {default_port_device(0x0af0, 0x7211)},
 453         {default_port_device(0x0af0, 0x7251)},
 454         {default_port_device(0x0af0, 0x7271)},
 455         {default_port_device(0x0af0, 0x7311)},
 456         {default_port_device(0x0af0, 0xc031)},  /* Icon-Edge */
 457         {icon321_port_device(0x0af0, 0xd013)},  /* Module HSxPA */
 458         {icon321_port_device(0x0af0, 0xd031)},  /* Icon-321 */
 459         {icon321_port_device(0x0af0, 0xd033)},  /* Icon-322 */
 460         {USB_DEVICE(0x0af0, 0x7301)},           /* GE40x */
 461         {USB_DEVICE(0x0af0, 0x7361)},           /* GE40x */
 462         {USB_DEVICE(0x0af0, 0x7381)},           /* GE40x */
 463         {USB_DEVICE(0x0af0, 0x7401)},           /* GI 0401 */
 464         {USB_DEVICE(0x0af0, 0x7501)},           /* GTM 382 */
 465         {USB_DEVICE(0x0af0, 0x7601)},           /* GE40x */
 466         {USB_DEVICE(0x0af0, 0x7701)},
 467         {USB_DEVICE(0x0af0, 0x7706)},
 468         {USB_DEVICE(0x0af0, 0x7801)},
 469         {USB_DEVICE(0x0af0, 0x7901)},
 470         {USB_DEVICE(0x0af0, 0x7A01)},
 471         {USB_DEVICE(0x0af0, 0x7A05)},
 472         {USB_DEVICE(0x0af0, 0x8200)},
 473         {USB_DEVICE(0x0af0, 0x8201)},
 474         {USB_DEVICE(0x0af0, 0x8300)},
 475         {USB_DEVICE(0x0af0, 0x8302)},
 476         {USB_DEVICE(0x0af0, 0x8304)},
 477         {USB_DEVICE(0x0af0, 0x8400)},
 478         {USB_DEVICE(0x0af0, 0xd035)},
 479         {USB_DEVICE(0x0af0, 0xd055)},
 480         {USB_DEVICE(0x0af0, 0xd155)},
 481         {USB_DEVICE(0x0af0, 0xd255)},
 482         {USB_DEVICE(0x0af0, 0xd057)},
 483         {USB_DEVICE(0x0af0, 0xd157)},
 484         {USB_DEVICE(0x0af0, 0xd257)},
 485         {USB_DEVICE(0x0af0, 0xd357)},
 486         {USB_DEVICE(0x0af0, 0xd058)},
 487         {USB_DEVICE(0x0af0, 0xc100)},
 488         {}
 489 };
 490 MODULE_DEVICE_TABLE(usb, hso_ids);
 491
 492 /* Sysfs attribute */
 493 static ssize_t hso_sysfs_show_porttype(struct device *dev,
 494                                        struct device_attribute *attr,
 495                                        char *buf)
 496 {
 497         struct hso_device *hso_dev = dev_get_drvdata(dev);
 498         char *port_name;
 499
 500         if (!hso_dev)
 501                 return 0;
 502
 503         switch (hso_dev->port_spec & HSO_PORT_MASK) {
 504         case HSO_PORT_CONTROL:
 505                 port_name = "Control";
 506                 break;
 507         case HSO_PORT_APP:
 508                 port_name = "Application";
 509                 break;
 510         case HSO_PORT_APP2:
 511                 port_name = "Application2";
 512                 break;
 513         case HSO_PORT_GPS:
 514                 port_name = "GPS";
 515                 break;
 516         case HSO_PORT_GPS_CONTROL:
 517                 port_name = "GPS Control";
 518                 break;
 519         case HSO_PORT_PCSC:
 520                 port_name = "PCSC";
 521                 break;
 522         case HSO_PORT_DIAG:
 523                 port_name = "Diagnostic";
 524                 break;
 525         case HSO_PORT_DIAG2:
 526                 port_name = "Diagnostic2";
 527                 break;
 528         case HSO_PORT_MODEM:
 529                 port_name = "Modem";
 530                 break;
 531         case HSO_PORT_NETWORK:
 532                 port_name = "Network";
 533                 break;
 534         default:
 535                 port_name = "Unknown";
 536                 break;
 537         }
 538
 539         return sprintf(buf, "%s\n", port_name);
 540 }
 541 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
 542
 543 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
 544 {
 545         int idx;
 546
 547         for (idx = 0; idx < serial->num_rx_urbs; idx++)
 548                 if (serial->rx_urb[idx] == urb)
 549                         return idx;
 550         dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
 551         return -1;
 552 }
 553
 554 /* converts mux value to a port spec value */
 555 static u32 hso_mux_to_port(int mux)
 556 {
 557         u32 result;
 558
 559         switch (mux) {
 560         case 0x1:
 561                 result = HSO_PORT_CONTROL;
 562                 break;
 563         case 0x2:
 564                 result = HSO_PORT_APP;
 565                 break;
 566         case 0x4:
 567                 result = HSO_PORT_PCSC;
 568                 break;
 569         case 0x8:
 570                 result = HSO_PORT_GPS;
 571                 break;
 572         case 0x10:
 573                 result = HSO_PORT_APP2;
 574                 break;
 575         default:
 576                 result = HSO_PORT_NO_PORT;
 577         }
 578         return result;
 579 }
 580
 581 /* converts port spec value to a mux value */
 582 static u32 hso_port_to_mux(int port)
 583 {
 584         u32 result;
 585
 586         switch (port & HSO_PORT_MASK) {
 587         case HSO_PORT_CONTROL:
 588                 result = 0x0;
 589                 break;
 590         case HSO_PORT_APP:
 591                 result = 0x1;
 592                 break;
 593         case HSO_PORT_PCSC:
 594                 result = 0x2;
 595                 break;
 596         case HSO_PORT_GPS:
 597                 result = 0x3;
 598                 break;
 599         case HSO_PORT_APP2:
 600                 result = 0x4;
 601                 break;
 602         default:
 603                 result = 0x0;
 604         }
 605         return result;
 606 }
 607
 608 static struct hso_serial *get_serial_by_shared_int_and_type(
 609                                         struct hso_shared_int *shared_int,
 610                                         int mux)
 611 {
 612         int i, port;
 613
 614         port = hso_mux_to_port(mux);
 615
 616         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
 617                 if (serial_table[i] &&
 618                     (dev2ser(serial_table[i])->shared_int == shared_int) &&
 619                     ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
 620                         return dev2ser(serial_table[i]);
 621                 }
 622         }
 623
 624         return NULL;
 625 }
 626
 627 static struct hso_serial *get_serial_by_index(unsigned index)
 628 {
 629         struct hso_serial *serial = NULL;
 630         unsigned long flags;
 631
 632         spin_lock_irqsave(&serial_table_lock, flags);
 633         if (serial_table[index])
 634                 serial = dev2ser(serial_table[index]);
 635         spin_unlock_irqrestore(&serial_table_lock, flags);
 636
 637         return serial;
 638 }
 639
 640 static int get_free_serial_index(void)
 641 {
 642         int index;
 643         unsigned long flags;
 644
 645         spin_lock_irqsave(&serial_table_lock, flags);
 646         for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
 647                 if (serial_table[index] == NULL) {
 648                         spin_unlock_irqrestore(&serial_table_lock, flags);
 649                         return index;
 650                 }
 651         }
 652         spin_unlock_irqrestore(&serial_table_lock, flags);
 653
 654         printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
 655         return -1;
 656 }
 657
 658 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
 659 {
 660         unsigned long flags;
 661
 662         spin_lock_irqsave(&serial_table_lock, flags);
 663         if (serial)
 664                 serial_table[index] = serial->parent;
 665         else
 666                 serial_table[index] = NULL;
 667         spin_unlock_irqrestore(&serial_table_lock, flags);
 668 }
 669
 670 static void handle_usb_error(int status, const char *function,
 671                              struct hso_device *hso_dev)
 672 {
 673         char *explanation;
 674
 675         switch (status) {
 676         case -ENODEV:
 677                 explanation = "no device";
 678                 break;
 679         case -ENOENT:
 680                 explanation = "endpoint not enabled";
 681                 break;
 682         case -EPIPE:
 683                 explanation = "endpoint stalled";
 684                 break;
 685         case -ENOSPC:
 686                 explanation = "not enough bandwidth";
 687                 break;
 688         case -ESHUTDOWN:
 689                 explanation = "device disabled";
 690                 break;
 691         case -EHOSTUNREACH:
 692                 explanation = "device suspended";
 693                 break;
 694         case -EINVAL:
 695         case -EAGAIN:
 696         case -EFBIG:
 697         case -EMSGSIZE:
 698                 explanation = "internal error";
 699                 break;
 700         case -EILSEQ:
 701         case -EPROTO:
 702         case -ETIME:
 703         case -ETIMEDOUT:
 704                 explanation = "protocol error";
 705                 if (hso_dev)
 706                         schedule_work(&hso_dev->reset_device);
 707                 break;
 708         default:
 709                 explanation = "unknown status";
 710                 break;
 711         }
 712
 713         /* log a meaningful explanation of an USB status */
 714         D1("%s: received USB status - %s (%d)", function, explanation, status);
 715 }
 716
 717 /* Network interface functions */
 718
 719 /* called when net interface is brought up by ifconfig */
 720 static int hso_net_open(struct net_device *net)
 721 {
 722         struct hso_net *odev = netdev_priv(net);
 723         unsigned long flags = 0;
 724
 725         if (!odev) {
 726                 dev_err(&net->dev, "No net device !\n");
 727                 return -ENODEV;
 728         }
 729
 730         odev->skb_tx_buf = NULL;
 731
 732         /* setup environment */
 733         spin_lock_irqsave(&odev->net_lock, flags);
 734         odev->rx_parse_state = WAIT_IP;
 735         odev->rx_buf_size = 0;
 736         odev->rx_buf_missing = sizeof(struct iphdr);
 737         spin_unlock_irqrestore(&odev->net_lock, flags);
 738
 739         /* We are up and running. */
 740         set_bit(HSO_NET_RUNNING, &odev->flags);
 741         hso_start_net_device(odev->parent);
 742
 743         /* Tell the kernel we are ready to start receiving from it */
 744         netif_start_queue(net);
 745
 746         return 0;
 747 }
 748
 749 /* called when interface is brought down by ifconfig */
 750 static int hso_net_close(struct net_device *net)
 751 {
 752         struct hso_net *odev = netdev_priv(net);
 753
 754         /* we don't need the queue anymore */
 755         netif_stop_queue(net);
 756         /* no longer running */
 757         clear_bit(HSO_NET_RUNNING, &odev->flags);
 758
 759         hso_stop_net_device(odev->parent);
 760
 761         /* done */
 762         return 0;
 763 }
 764
 765 /* USB tells is xmit done, we should start the netqueue again */
 766 static void write_bulk_callback(struct urb *urb)
 767 {
 768         struct hso_net *odev = urb->context;
 769         int status = urb->status;
 770
 771         /* Sanity check */
 772         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
 773                 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
 774                 return;
 775         }
 776
 777         /* Do we still have a valid kernel network device? */
 778         if (!netif_device_present(odev->net)) {
 779                 dev_err(&urb->dev->dev, "%s: net device not present\n",
 780                         __func__);
 781                 return;
 782         }
 783
 784         /* log status, but don't act on it, we don't need to resubmit anything
 785          * anyhow */
 786         if (status)
 787                 handle_usb_error(status, __func__, odev->parent);
 788
 789         hso_put_activity(odev->parent);
 790
 791         /* Tell the network interface we are ready for another frame */
 792         netif_wake_queue(odev->net);
 793 }
 794
 795 /* called by kernel when we need to transmit a packet */
 796 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
 797                                             struct net_device *net)
 798 {
 799         struct hso_net *odev = netdev_priv(net);
 800         int result;
 801
 802         /* Tell the kernel, "No more frames 'til we are done with this one." */
 803         netif_stop_queue(net);
 804         if (hso_get_activity(odev->parent) == -EAGAIN) {
 805                 odev->skb_tx_buf = skb;
 806                 return NETDEV_TX_OK;
 807         }
 808
 809         /* log if asked */
 810         DUMP1(skb->data, skb->len);
 811         /* Copy it from kernel memory to OUR memory */
 812         memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
 813         D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
 814
 815         /* Fill in the URB for shipping it out. */
 816         usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
 817                           odev->parent->usb,
 818                           usb_sndbulkpipe(odev->parent->usb,
 819                                           odev->out_endp->
 820                                           bEndpointAddress & 0x7F),
 821                           odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
 822                           odev);
 823
 824         /* Deal with the Zero Length packet problem, I hope */
 825         odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
 826
 827         /* Send the URB on its merry way. */
 828         result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
 829         if (result) {
 830                 dev_warn(&odev->parent->interface->dev,
 831                         "failed mux_bulk_tx_urb %d\n", result);
 832                 net->stats.tx_errors++;
 833                 netif_start_queue(net);
 834         } else {
 835                 net->stats.tx_packets++;
 836                 net->stats.tx_bytes += skb->len;
 837                 /* And tell the kernel when the last transmit started. */
 838                 net->trans_start = jiffies;
 839         }
 840         dev_kfree_skb(skb);
 841         /* we're done */
 842         return NETDEV_TX_OK;
 843 }
 844
 845 static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
 846 {
 847         struct hso_net *odev = netdev_priv(net);
 848
 849         strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
 850         strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
 851         usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info);
 852 }
 853
 854 static const struct ethtool_ops ops = {
 855         .get_drvinfo = hso_get_drvinfo,
 856         .get_link = ethtool_op_get_link
 857 };
 858
 859 /* called when a packet did not ack after watchdogtimeout */
 860 static void hso_net_tx_timeout(struct net_device *net)
 861 {
 862         struct hso_net *odev = netdev_priv(net);
 863
 864         if (!odev)
 865                 return;
 866
 867         /* Tell syslog we are hosed. */
 868         dev_warn(&net->dev, "Tx timed out.\n");
 869
 870         /* Tear the waiting frame off the list */
 871         if (odev->mux_bulk_tx_urb &&
 872             (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
 873                 usb_unlink_urb(odev->mux_bulk_tx_urb);
 874
 875         /* Update statistics */
 876         net->stats.tx_errors++;
 877 }
 878
 879 /* make a real packet from the received USB buffer */
 880 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
 881                         unsigned int count, unsigned char is_eop)
 882 {
 883         unsigned short temp_bytes;
 884         unsigned short buffer_offset = 0;
 885         unsigned short frame_len;
 886         unsigned char *tmp_rx_buf;
 887
 888         /* log if needed */
 889         D1("Rx %d bytes", count);
 890         DUMP(ip_pkt, min(128, (int)count));
 891
 892         while (count) {
 893                 switch (odev->rx_parse_state) {
 894                 case WAIT_IP:
 895                         /* waiting for IP header. */
 896                         /* wanted bytes - size of ip header */
 897                         temp_bytes =
 898                             (count <
 899                              odev->rx_buf_missing) ? count : odev->
 900                             rx_buf_missing;
 901
 902                         memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
 903                                odev->rx_buf_size, ip_pkt + buffer_offset,
 904                                temp_bytes);
 905
 906                         odev->rx_buf_size += temp_bytes;
 907                         buffer_offset += temp_bytes;
 908                         odev->rx_buf_missing -= temp_bytes;
 909                         count -= temp_bytes;
 910
 911                         if (!odev->rx_buf_missing) {
 912                                 /* header is complete allocate an sk_buffer and
 913                                  * continue to WAIT_DATA */
 914                                 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
 915
 916                                 if ((frame_len > DEFAULT_MRU) ||
 917                                     (frame_len < sizeof(struct iphdr))) {
 918                                         dev_err(&odev->net->dev,
 919                                                 "Invalid frame (%d) length\n",
 920                                                 frame_len);
 921                                         odev->rx_parse_state = WAIT_SYNC;
 922                                         continue;
 923                                 }
 924                                 /* Allocate an sk_buff */
 925                                 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
 926                                                                     frame_len);
 927                                 if (!odev->skb_rx_buf) {
 928                                         /* We got no receive buffer. */
 929                                         D1("could not allocate memory");
 930                                         odev->rx_parse_state = WAIT_SYNC;
 931                                         return;
 932                                 }
 933
 934                                 /* Copy what we got so far. make room for iphdr
 935                                  * after tail. */
 936                                 tmp_rx_buf =
 937                                     skb_put(odev->skb_rx_buf,
 938                                             sizeof(struct iphdr));
 939                                 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
 940                                        sizeof(struct iphdr));
 941
 942                                 /* ETH_HLEN */
 943                                 odev->rx_buf_size = sizeof(struct iphdr);
 944
 945                                 /* Filip actually use .tot_len */
 946                                 odev->rx_buf_missing =
 947                                     frame_len - sizeof(struct iphdr);
 948                                 odev->rx_parse_state = WAIT_DATA;
 949                         }
 950                         break;
 951
 952                 case WAIT_DATA:
 953                         temp_bytes = (count < odev->rx_buf_missing)
 954                                         ? count : odev->rx_buf_missing;
 955
 956                         /* Copy the rest of the bytes that are left in the
 957                          * buffer into the waiting sk_buf. */
 958                         /* Make room for temp_bytes after tail. */
 959                         tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
 960                         memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
 961
 962                         odev->rx_buf_missing -= temp_bytes;
 963                         count -= temp_bytes;
 964                         buffer_offset += temp_bytes;
 965                         odev->rx_buf_size += temp_bytes;
 966                         if (!odev->rx_buf_missing) {
 967                                 /* Packet is complete. Inject into stack. */
 968                                 /* We have IP packet here */
 969                                 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
 970                                 /* don't check it */
 971                                 odev->skb_rx_buf->ip_summed =
 972                                         CHECKSUM_UNNECESSARY;
 973
 974                                 skb_reset_mac_header(odev->skb_rx_buf);
 975
 976                                 /* Ship it off to the kernel */
 977                                 netif_rx(odev->skb_rx_buf);
 978                                 /* No longer our buffer. */
 979                                 odev->skb_rx_buf = NULL;
 980
 981                                 /* update out statistics */
 982                                 odev->net->stats.rx_packets++;
 983
 984                                 odev->net->stats.rx_bytes += odev->rx_buf_size;
 985
 986                                 odev->rx_buf_size = 0;
 987                                 odev->rx_buf_missing = sizeof(struct iphdr);
 988                                 odev->rx_parse_state = WAIT_IP;
 989                         }
 990                         break;
 991
 992                 case WAIT_SYNC:
 993                         D1(" W_S");
 994                         count = 0;
 995                         break;
 996                 default:
 997                         D1(" ");
 998                         count--;
 999                         break;
1000                 }
1001         }
1002
1003         /* Recovery mechanism for WAIT_SYNC state. */
1004         if (is_eop) {
1005                 if (odev->rx_parse_state == WAIT_SYNC) {
1006                         odev->rx_parse_state = WAIT_IP;
1007                         odev->rx_buf_size = 0;
1008                         odev->rx_buf_missing = sizeof(struct iphdr);
1009                 }
1010         }
1011 }
1012
1013 /* Moving data from usb to kernel (in interrupt state) */
1014 static void read_bulk_callback(struct urb *urb)
1015 {
1016         struct hso_net *odev = urb->context;
1017         struct net_device *net;
1018         int result;
1019         int status = urb->status;
1020
1021         /* is al ok?  (Filip: Who's Al ?) */
1022         if (status) {
1023                 handle_usb_error(status, __func__, odev->parent);
1024                 return;
1025         }
1026
1027         /* Sanity check */
1028         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1029                 D1("BULK IN callback but driver is not active!");
1030                 return;
1031         }
1032         usb_mark_last_busy(urb->dev);
1033
1034         net = odev->net;
1035
1036         if (!netif_device_present(net)) {
1037                 /* Somebody killed our network interface... */
1038                 return;
1039         }
1040
1041         if (odev->parent->port_spec & HSO_INFO_CRC_BUG) {
1042                 u32 rest;
1043                 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1044                 rest = urb->actual_length %
1045                         le16_to_cpu(odev->in_endp->wMaxPacketSize);
1046                 if (((rest == 5) || (rest == 6)) &&
1047                     !memcmp(((u8 *) urb->transfer_buffer) +
1048                             urb->actual_length - 4, crc_check, 4)) {
1049                         urb->actual_length -= 4;
1050                 }
1051         }
1052
1053         /* do we even have a packet? */
1054         if (urb->actual_length) {
1055                 /* Handle the IP stream, add header and push it onto network
1056                  * stack if the packet is complete. */
1057                 spin_lock(&odev->net_lock);
1058                 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1059                             (urb->transfer_buffer_length >
1060                              urb->actual_length) ? 1 : 0);
1061                 spin_unlock(&odev->net_lock);
1062         }
1063
1064         /* We are done with this URB, resubmit it. Prep the USB to wait for
1065          * another frame. Reuse same as received. */
1066         usb_fill_bulk_urb(urb,
1067                           odev->parent->usb,
1068                           usb_rcvbulkpipe(odev->parent->usb,
1069                                           odev->in_endp->
1070                                           bEndpointAddress & 0x7F),
1071                           urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1072                           read_bulk_callback, odev);
1073
1074         /* Give this to the USB subsystem so it can tell us when more data
1075          * arrives. */
1076         result = usb_submit_urb(urb, GFP_ATOMIC);
1077         if (result)
1078                 dev_warn(&odev->parent->interface->dev,
1079                          "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1080                          result);
1081 }
1082
1083 /* Serial driver functions */
1084
1085 static void hso_init_termios(struct ktermios *termios)
1086 {
1087         /*
1088          * The default requirements for this device are:
1089          */
1090         termios->c_iflag &=
1091                 ~(IGNBRK        /* disable ignore break */
1092                 | BRKINT        /* disable break causes interrupt */
1093                 | PARMRK        /* disable mark parity errors */
1094                 | ISTRIP        /* disable clear high bit of input characters */
1095                 | INLCR         /* disable translate NL to CR */
1096                 | IGNCR         /* disable ignore CR */
1097                 | ICRNL         /* disable translate CR to NL */
1098                 | IXON);        /* disable enable XON/XOFF flow control */
1099
1100         /* disable postprocess output characters */
1101         termios->c_oflag &= ~OPOST;
1102
1103         termios->c_lflag &=
1104                 ~(ECHO          /* disable echo input characters */
1105                 | ECHONL        /* disable echo new line */
1106                 | ICANON        /* disable erase, kill, werase, and rprnt
1107                                    special characters */
1108                 | ISIG          /* disable interrupt, quit, and suspend special
1109                                    characters */
1110                 | IEXTEN);      /* disable non-POSIX special characters */
1111
1112         termios->c_cflag &=
1113                 ~(CSIZE         /* no size */
1114                 | PARENB        /* disable parity bit */
1115                 | CBAUD         /* clear current baud rate */
1116                 | CBAUDEX);     /* clear current buad rate */
1117
1118         termios->c_cflag |= CS8;        /* character size 8 bits */
1119
1120         /* baud rate 115200 */
1121         tty_termios_encode_baud_rate(termios, 115200, 115200);
1122 }
1123
1124 static void _hso_serial_set_termios(struct tty_struct *tty,
1125                                     struct ktermios *old)
1126 {
1127         struct hso_serial *serial = get_serial_by_tty(tty);
1128         struct ktermios *termios;
1129
1130         if (!serial) {
1131                 printk(KERN_ERR "%s: no tty structures", __func__);
1132                 return;
1133         }
1134
1135         D4("port %d", serial->minor);
1136
1137         /*
1138          *      Fix up unsupported bits
1139          */
1140         termios = tty->termios;
1141         termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1142
1143         termios->c_cflag &=
1144                 ~(CSIZE         /* no size */
1145                 | PARENB        /* disable parity bit */
1146                 | CBAUD         /* clear current baud rate */
1147                 | CBAUDEX);     /* clear current buad rate */
1148
1149         termios->c_cflag |= CS8;        /* character size 8 bits */
1150
1151         /* baud rate 115200 */
1152         tty_encode_baud_rate(tty, 115200, 115200);
1153 }
1154
1155 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1156 {
1157         int result;
1158         /* We are done with this URB, resubmit it. Prep the USB to wait for
1159          * another frame */
1160         usb_fill_bulk_urb(urb, serial->parent->usb,
1161                           usb_rcvbulkpipe(serial->parent->usb,
1162                                           serial->in_endp->
1163                                           bEndpointAddress & 0x7F),
1164                           urb->transfer_buffer, serial->rx_data_length,
1165                           hso_std_serial_read_bulk_callback, serial);
1166         /* Give this to the USB subsystem so it can tell us when more data
1167          * arrives. */
1168         result = usb_submit_urb(urb, GFP_ATOMIC);
1169         if (result) {
1170                 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1171                         __func__, result);
1172         }
1173 }
1174
1175
1176
1177
1178 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1179 {
1180         int count;
1181         struct urb *curr_urb;
1182
1183         while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1184                 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1185                 count = put_rxbuf_data(curr_urb, serial);
1186                 if (count == -1)
1187                         return;
1188                 if (count == 0) {
1189                         serial->curr_rx_urb_idx++;
1190                         if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1191                                 serial->curr_rx_urb_idx = 0;
1192                         hso_resubmit_rx_bulk_urb(serial, curr_urb);
1193                 }
1194         }
1195 }
1196
1197 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1198 {
1199         int count = 0;
1200         struct urb *urb;
1201
1202         urb = serial->rx_urb[0];
1203         if (serial->open_count > 0) {
1204                 count = put_rxbuf_data(urb, serial);
1205                 if (count == -1)
1206                         return;
1207         }
1208         /* Re issue a read as long as we receive data. */
1209
1210         if (count == 0 && ((urb->actual_length != 0) ||
1211                            (serial->rx_state == RX_PENDING))) {
1212                 serial->rx_state = RX_SENT;
1213                 hso_mux_serial_read(serial);
1214         } else
1215                 serial->rx_state = RX_IDLE;
1216 }
1217
1218
1219 /* read callback for Diag and CS port */
1220 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1221 {
1222         struct hso_serial *serial = urb->context;
1223         int status = urb->status;
1224
1225         /* sanity check */
1226         if (!serial) {
1227                 D1("serial == NULL");
1228                 return;
1229         } else if (status) {
1230                 handle_usb_error(status, __func__, serial->parent);
1231                 return;
1232         }
1233
1234         D4("\n--- Got serial_read_bulk callback %02x ---", status);
1235         D1("Actual length = %d\n", urb->actual_length);
1236         DUMP1(urb->transfer_buffer, urb->actual_length);
1237
1238         /* Anyone listening? */
1239         if (serial->open_count == 0)
1240                 return;
1241
1242         if (status == 0) {
1243                 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) {
1244                         u32 rest;
1245                         u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1246                         rest =
1247                             urb->actual_length %
1248                             le16_to_cpu(serial->in_endp->wMaxPacketSize);
1249                         if (((rest == 5) || (rest == 6)) &&
1250                             !memcmp(((u8 *) urb->transfer_buffer) +
1251                                     urb->actual_length - 4, crc_check, 4)) {
1252                                 urb->actual_length -= 4;
1253                         }
1254                 }
1255                 /* Valid data, handle RX data */
1256                 spin_lock(&serial->serial_lock);
1257                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1258                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1259                 spin_unlock(&serial->serial_lock);
1260         } else if (status == -ENOENT || status == -ECONNRESET) {
1261                 /* Unlinked - check for throttled port. */
1262                 D2("Port %d, successfully unlinked urb", serial->minor);
1263                 spin_lock(&serial->serial_lock);
1264                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1265                 hso_resubmit_rx_bulk_urb(serial, urb);
1266                 spin_unlock(&serial->serial_lock);
1267         } else {
1268                 D2("Port %d, status = %d for read urb", serial->minor, status);
1269                 return;
1270         }
1271 }
1272
1273 /*
1274  * This needs to be a tasklet otherwise we will
1275  * end up recursively calling this function.
1276  */
1277 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1278 {
1279         unsigned long flags;
1280
1281         spin_lock_irqsave(&serial->serial_lock, flags);
1282         if ((serial->parent->port_spec & HSO_INTF_MUX))
1283                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1284         else
1285                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1286         spin_unlock_irqrestore(&serial->serial_lock, flags);
1287 }
1288
1289 static  void hso_unthrottle(struct tty_struct *tty)
1290 {
1291         struct hso_serial *serial = get_serial_by_tty(tty);
1292
1293         tasklet_hi_schedule(&serial->unthrottle_tasklet);
1294 }
1295
1296 static void hso_unthrottle_workfunc(struct work_struct *work)
1297 {
1298         struct hso_serial *serial =
1299             container_of(work, struct hso_serial,
1300                          retry_unthrottle_workqueue);
1301         hso_unthrottle_tasklet(serial);
1302 }
1303
1304 /* open the requested serial port */
1305 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1306 {
1307         struct hso_serial *serial = get_serial_by_index(tty->index);
1308         int result;
1309
1310         /* sanity check */
1311         if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1312                 WARN_ON(1);
1313                 tty->driver_data = NULL;
1314                 D1("Failed to open port");
1315                 return -ENODEV;
1316         }
1317
1318         mutex_lock(&serial->parent->mutex);
1319         result = usb_autopm_get_interface(serial->parent->interface);
1320         if (result < 0)
1321                 goto err_out;
1322
1323         D1("Opening %d", serial->minor);
1324         kref_get(&serial->parent->ref);
1325
1326         /* setup */
1327         spin_lock_irq(&serial->serial_lock);
1328         tty->driver_data = serial;
1329         tty_kref_put(serial->tty);
1330         serial->tty = tty_kref_get(tty);
1331         spin_unlock_irq(&serial->serial_lock);
1332
1333         /* check for port already opened, if not set the termios */
1334         serial->open_count++;
1335         if (serial->open_count == 1) {
1336                 tty->low_latency = 1;
1337                 serial->rx_state = RX_IDLE;
1338                 /* Force default termio settings */
1339                 _hso_serial_set_termios(tty, NULL);
1340                 tasklet_init(&serial->unthrottle_tasklet,
1341                              (void (*)(unsigned long))hso_unthrottle_tasklet,
1342                              (unsigned long)serial);
1343                 INIT_WORK(&serial->retry_unthrottle_workqueue,
1344                           hso_unthrottle_workfunc);
1345                 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1346                 if (result) {
1347                         hso_stop_serial_device(serial->parent);
1348                         serial->open_count--;
1349                         kref_put(&serial->parent->ref, hso_serial_ref_free);
1350                 }
1351         } else {
1352                 D1("Port was already open");
1353         }
1354
1355         usb_autopm_put_interface(serial->parent->interface);
1356
1357         /* done */
1358         if (result)
1359                 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0);
1360 err_out:
1361         mutex_unlock(&serial->parent->mutex);
1362         return result;
1363 }
1364
1365 /* close the requested serial port */
1366 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1367 {
1368         struct hso_serial *serial = tty->driver_data;
1369         u8 usb_gone;
1370
1371         D1("Closing serial port");
1372
1373         /* Open failed, no close cleanup required */
1374         if (serial == NULL)
1375                 return;
1376
1377         mutex_lock(&serial->parent->mutex);
1378         usb_gone = serial->parent->usb_gone;
1379
1380         if (!usb_gone)
1381                 usb_autopm_get_interface(serial->parent->interface);
1382
1383         /* reset the rts and dtr */
1384         /* do the actual close */
1385         serial->open_count--;
1386
1387         if (serial->open_count <= 0) {
1388                 serial->open_count = 0;
1389                 spin_lock_irq(&serial->serial_lock);
1390                 if (serial->tty == tty) {
1391                         serial->tty->driver_data = NULL;
1392                         serial->tty = NULL;
1393                         tty_kref_put(tty);
1394                 }
1395                 spin_unlock_irq(&serial->serial_lock);
1396                 if (!usb_gone)
1397                         hso_stop_serial_device(serial->parent);
1398                 tasklet_kill(&serial->unthrottle_tasklet);
1399                 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1400         }
1401
1402         if (!usb_gone)
1403                 usb_autopm_put_interface(serial->parent->interface);
1404
1405         mutex_unlock(&serial->parent->mutex);
1406
1407         kref_put(&serial->parent->ref, hso_serial_ref_free);
1408 }
1409
1410 /* close the requested serial port */
1411 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1412                             int count)
1413 {
1414         struct hso_serial *serial = get_serial_by_tty(tty);
1415         int space, tx_bytes;
1416         unsigned long flags;
1417
1418         /* sanity check */
1419         if (serial == NULL) {
1420                 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1421                 return -ENODEV;
1422         }
1423
1424         spin_lock_irqsave(&serial->serial_lock, flags);
1425
1426         space = serial->tx_data_length - serial->tx_buffer_count;
1427         tx_bytes = (count < space) ? count : space;
1428
1429         if (!tx_bytes)
1430                 goto out;
1431
1432         memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1433         serial->tx_buffer_count += tx_bytes;
1434
1435 out:
1436         spin_unlock_irqrestore(&serial->serial_lock, flags);
1437
1438         hso_kick_transmit(serial);
1439         /* done */
1440         return tx_bytes;
1441 }
1442
1443 /* how much room is there for writing */
1444 static int hso_serial_write_room(struct tty_struct *tty)
1445 {
1446         struct hso_serial *serial = get_serial_by_tty(tty);
1447         int room;
1448         unsigned long flags;
1449
1450         spin_lock_irqsave(&serial->serial_lock, flags);
1451         room = serial->tx_data_length - serial->tx_buffer_count;
1452         spin_unlock_irqrestore(&serial->serial_lock, flags);
1453
1454         /* return free room */
1455         return room;
1456 }
1457
1458 /* setup the term */
1459 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1460 {
1461         struct hso_serial *serial = get_serial_by_tty(tty);
1462         unsigned long flags;
1463
1464         if (old)
1465                 D5("Termios called with: cflags new[%d] - old[%d]",
1466                    tty->termios->c_cflag, old->c_cflag);
1467
1468         /* the actual setup */
1469         spin_lock_irqsave(&serial->serial_lock, flags);
1470         if (serial->open_count)
1471                 _hso_serial_set_termios(tty, old);
1472         else
1473                 tty->termios = old;
1474         spin_unlock_irqrestore(&serial->serial_lock, flags);
1475
1476         /* done */
1477         return;
1478 }
1479
1480 /* how many characters in the buffer */
1481 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1482 {
1483         struct hso_serial *serial = get_serial_by_tty(tty);
1484         int chars;
1485         unsigned long flags;
1486
1487         /* sanity check */
1488         if (serial == NULL)
1489                 return 0;
1490
1491         spin_lock_irqsave(&serial->serial_lock, flags);
1492         chars = serial->tx_buffer_count;
1493         spin_unlock_irqrestore(&serial->serial_lock, flags);
1494
1495         return chars;
1496 }
1497 static int tiocmget_submit_urb(struct hso_serial *serial,
1498                                struct hso_tiocmget *tiocmget,
1499                                struct usb_device *usb)
1500 {
1501         int result;
1502
1503         if (serial->parent->usb_gone)
1504                 return -ENODEV;
1505         usb_fill_int_urb(tiocmget->urb, usb,
1506                          usb_rcvintpipe(usb,
1507                                         tiocmget->endp->
1508                                         bEndpointAddress & 0x7F),
1509                          &tiocmget->serial_state_notification,
1510                          sizeof(struct hso_serial_state_notification),
1511                          tiocmget_intr_callback, serial,
1512                          tiocmget->endp->bInterval);
1513         result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1514         if (result) {
1515                 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1516                          result);
1517         }
1518         return result;
1519
1520 }
1521
1522 static void tiocmget_intr_callback(struct urb *urb)
1523 {
1524         struct hso_serial *serial = urb->context;
1525         struct hso_tiocmget *tiocmget;
1526         int status = urb->status;
1527         u16 UART_state_bitmap, prev_UART_state_bitmap;
1528         struct uart_icount *icount;
1529         struct hso_serial_state_notification *serial_state_notification;
1530         struct usb_device *usb;
1531
1532         /* Sanity checks */
1533         if (!serial)
1534                 return;
1535         if (status) {
1536                 handle_usb_error(status, __func__, serial->parent);
1537                 return;
1538         }
1539         tiocmget = serial->tiocmget;
1540         if (!tiocmget)
1541                 return;
1542         usb = serial->parent->usb;
1543         serial_state_notification = &tiocmget->serial_state_notification;
1544         if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1545             serial_state_notification->bNotification != B_NOTIFICATION ||
1546             le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1547             le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1548             le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1549                 dev_warn(&usb->dev,
1550                          "hso received invalid serial state notification\n");
1551                 DUMP(serial_state_notification,
1552                      sizeof(struct hso_serial_state_notification));
1553         } else {
1554
1555                 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1556                                                 UART_state_bitmap);
1557                 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1558                 icount = &tiocmget->icount;
1559                 spin_lock(&serial->serial_lock);
1560                 if ((UART_state_bitmap & B_OVERRUN) !=
1561                    (prev_UART_state_bitmap & B_OVERRUN))
1562                         icount->parity++;
1563                 if ((UART_state_bitmap & B_PARITY) !=
1564                    (prev_UART_state_bitmap & B_PARITY))
1565                         icount->parity++;
1566                 if ((UART_state_bitmap & B_FRAMING) !=
1567                    (prev_UART_state_bitmap & B_FRAMING))
1568                         icount->frame++;
1569                 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1570                    !(prev_UART_state_bitmap & B_RING_SIGNAL))
1571                         icount->rng++;
1572                 if ((UART_state_bitmap & B_BREAK) !=
1573                    (prev_UART_state_bitmap & B_BREAK))
1574                         icount->brk++;
1575                 if ((UART_state_bitmap & B_TX_CARRIER) !=
1576                    (prev_UART_state_bitmap & B_TX_CARRIER))
1577                         icount->dsr++;
1578                 if ((UART_state_bitmap & B_RX_CARRIER) !=
1579                    (prev_UART_state_bitmap & B_RX_CARRIER))
1580                         icount->dcd++;
1581                 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1582                 spin_unlock(&serial->serial_lock);
1583                 tiocmget->intr_completed = 1;
1584                 wake_up_interruptible(&tiocmget->waitq);
1585         }
1586         memset(serial_state_notification, 0,
1587                sizeof(struct hso_serial_state_notification));
1588         tiocmget_submit_urb(serial,
1589                             tiocmget,
1590                             serial->parent->usb);
1591 }
1592
1593 /*
1594  * next few functions largely stolen from drivers/serial/serial_core.c
1595  */
1596 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1597  * - mask passed in arg for lines of interest
1598  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1599  * Caller should use TIOCGICOUNT to see which one it was
1600  */
1601 static int
1602 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1603 {
1604         DECLARE_WAITQUEUE(wait, current);
1605         struct uart_icount cprev, cnow;
1606         struct hso_tiocmget  *tiocmget;
1607         int ret;
1608
1609         tiocmget = serial->tiocmget;
1610         if (!tiocmget)
1611                 return -ENOENT;
1612         /*
1613          * note the counters on entry
1614          */
1615         spin_lock_irq(&serial->serial_lock);
1616         memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1617         spin_unlock_irq(&serial->serial_lock);
1618         add_wait_queue(&tiocmget->waitq, &wait);
1619         for (;;) {
1620                 spin_lock_irq(&serial->serial_lock);
1621                 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1622                 spin_unlock_irq(&serial->serial_lock);
1623                 set_current_state(TASK_INTERRUPTIBLE);
1624                 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1625                     ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1626                     ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd))) {
1627                         ret = 0;
1628                         break;
1629                 }
1630                 schedule();
1631                 /* see if a signal did it */
1632                 if (signal_pending(current)) {
1633                         ret = -ERESTARTSYS;
1634                         break;
1635                 }
1636                 cprev = cnow;
1637         }
1638         current->state = TASK_RUNNING;
1639         remove_wait_queue(&tiocmget->waitq, &wait);
1640
1641         return ret;
1642 }
1643
1644 /*
1645  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1646  * Return: write counters to the user passed counter struct
1647  * NB: both 1->0 and 0->1 transitions are counted except for
1648  *     RI where only 0->1 is counted.
1649  */
1650 static int hso_get_count(struct hso_serial *serial,
1651                           struct serial_icounter_struct __user *icnt)
1652 {
1653         struct serial_icounter_struct icount;
1654         struct uart_icount cnow;
1655         struct hso_tiocmget  *tiocmget = serial->tiocmget;
1656
1657         if (!tiocmget)
1658                  return -ENOENT;
1659         spin_lock_irq(&serial->serial_lock);
1660         memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1661         spin_unlock_irq(&serial->serial_lock);
1662
1663         icount.cts         = cnow.cts;
1664         icount.dsr         = cnow.dsr;
1665         icount.rng         = cnow.rng;
1666         icount.dcd         = cnow.dcd;
1667         icount.rx          = cnow.rx;
1668         icount.tx          = cnow.tx;
1669         icount.frame       = cnow.frame;
1670         icount.overrun     = cnow.overrun;
1671         icount.parity      = cnow.parity;
1672         icount.brk         = cnow.brk;
1673         icount.buf_overrun = cnow.buf_overrun;
1674
1675         return copy_to_user(icnt, &icount, sizeof(icount)) ? -EFAULT : 0;
1676 }
1677
1678
1679 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
1680 {
1681         int retval;
1682         struct hso_serial *serial = get_serial_by_tty(tty);
1683         struct hso_tiocmget  *tiocmget;
1684         u16 UART_state_bitmap;
1685
1686         /* sanity check */
1687         if (!serial) {
1688                 D1("no tty structures");
1689                 return -EINVAL;
1690         }
1691         spin_lock_irq(&serial->serial_lock);
1692         retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1693             ((serial->dtr_state) ? TIOCM_DTR : 0);
1694         tiocmget = serial->tiocmget;
1695         if (tiocmget) {
1696
1697                 UART_state_bitmap = le16_to_cpu(
1698                         tiocmget->prev_UART_state_bitmap);
1699                 if (UART_state_bitmap & B_RING_SIGNAL)
1700                         retval |=  TIOCM_RNG;
1701                 if (UART_state_bitmap & B_RX_CARRIER)
1702                         retval |=  TIOCM_CD;
1703                 if (UART_state_bitmap & B_TX_CARRIER)
1704                         retval |=  TIOCM_DSR;
1705         }
1706         spin_unlock_irq(&serial->serial_lock);
1707         return retval;
1708 }
1709
1710 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
1711                                unsigned int set, unsigned int clear)
1712 {
1713         int val = 0;
1714         unsigned long flags;
1715         int if_num;
1716         struct hso_serial *serial = get_serial_by_tty(tty);
1717
1718         /* sanity check */
1719         if (!serial) {
1720                 D1("no tty structures");
1721                 return -EINVAL;
1722         }
1723
1724         if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1725                 return -EINVAL;
1726
1727         if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1728
1729         spin_lock_irqsave(&serial->serial_lock, flags);
1730         if (set & TIOCM_RTS)
1731                 serial->rts_state = 1;
1732         if (set & TIOCM_DTR)
1733                 serial->dtr_state = 1;
1734
1735         if (clear & TIOCM_RTS)
1736                 serial->rts_state = 0;
1737         if (clear & TIOCM_DTR)
1738                 serial->dtr_state = 0;
1739
1740         if (serial->dtr_state)
1741                 val |= 0x01;
1742         if (serial->rts_state)
1743                 val |= 0x02;
1744
1745         spin_unlock_irqrestore(&serial->serial_lock, flags);
1746
1747         return usb_control_msg(serial->parent->usb,
1748                                usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1749                                0x21, val, if_num, NULL, 0,
1750                                USB_CTRL_SET_TIMEOUT);
1751 }
1752
1753 static int hso_serial_ioctl(struct tty_struct *tty, struct file *file,
1754                             unsigned int cmd, unsigned long arg)
1755 {
1756         struct hso_serial *serial =  get_serial_by_tty(tty);
1757         void __user *uarg = (void __user *)arg;
1758         int ret = 0;
1759         D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1760
1761         if (!serial)
1762                 return -ENODEV;
1763         switch (cmd) {
1764         case TIOCMIWAIT:
1765                 ret = hso_wait_modem_status(serial, arg);
1766                 break;
1767
1768         case TIOCGICOUNT:
1769                 ret = hso_get_count(serial, uarg);
1770                 break;
1771         default:
1772                 ret = -ENOIOCTLCMD;
1773                 break;
1774         }
1775         return ret;
1776 }
1777
1778
1779 /* starts a transmit */
1780 static void hso_kick_transmit(struct hso_serial *serial)
1781 {
1782         u8 *temp;
1783         unsigned long flags;
1784         int res;
1785
1786         spin_lock_irqsave(&serial->serial_lock, flags);
1787         if (!serial->tx_buffer_count)
1788                 goto out;
1789
1790         if (serial->tx_urb_used)
1791                 goto out;
1792
1793         /* Wakeup USB interface if necessary */
1794         if (hso_get_activity(serial->parent) == -EAGAIN)
1795                 goto out;
1796
1797         /* Switch pointers around to avoid memcpy */
1798         temp = serial->tx_buffer;
1799         serial->tx_buffer = serial->tx_data;
1800         serial->tx_data = temp;
1801         serial->tx_data_count = serial->tx_buffer_count;
1802         serial->tx_buffer_count = 0;
1803
1804         /* If temp is set, it means we switched buffers */
1805         if (temp && serial->write_data) {
1806                 res = serial->write_data(serial);
1807                 if (res >= 0)
1808                         serial->tx_urb_used = 1;
1809         }
1810 out:
1811         spin_unlock_irqrestore(&serial->serial_lock, flags);
1812 }
1813
1814 /* make a request (for reading and writing data to muxed serial port) */
1815 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1816                               struct urb *ctrl_urb,
1817                               struct usb_ctrlrequest *ctrl_req,
1818                               u8 *ctrl_urb_data, u32 size)
1819 {
1820         int result;
1821         int pipe;
1822
1823         /* Sanity check */
1824         if (!serial || !ctrl_urb || !ctrl_req) {
1825                 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1826                 return -EINVAL;
1827         }
1828
1829         /* initialize */
1830         ctrl_req->wValue = 0;
1831         ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1832         ctrl_req->wLength = cpu_to_le16(size);
1833
1834         if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1835                 /* Reading command */
1836                 ctrl_req->bRequestType = USB_DIR_IN |
1837                                          USB_TYPE_OPTION_VENDOR |
1838                                          USB_RECIP_INTERFACE;
1839                 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1840                 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1841         } else {
1842                 /* Writing command */
1843                 ctrl_req->bRequestType = USB_DIR_OUT |
1844                                          USB_TYPE_OPTION_VENDOR |
1845                                          USB_RECIP_INTERFACE;
1846                 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1847                 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1848         }
1849         /* syslog */
1850         D2("%s command (%02x) len: %d, port: %d",
1851            type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1852            ctrl_req->bRequestType, ctrl_req->wLength, port);
1853
1854         /* Load ctrl urb */
1855         ctrl_urb->transfer_flags = 0;
1856         usb_fill_control_urb(ctrl_urb,
1857                              serial->parent->usb,
1858                              pipe,
1859                              (u8 *) ctrl_req,
1860                              ctrl_urb_data, size, ctrl_callback, serial);
1861         /* Send it on merry way */
1862         result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1863         if (result) {
1864                 dev_err(&ctrl_urb->dev->dev,
1865                         "%s failed submit ctrl_urb %d type %d\n", __func__,
1866                         result, type);
1867                 return result;
1868         }
1869
1870         /* done */
1871         return size;
1872 }
1873
1874 /* called by intr_callback when read occurs */
1875 static int hso_mux_serial_read(struct hso_serial *serial)
1876 {
1877         if (!serial)
1878                 return -EINVAL;
1879
1880         /* clean data */
1881         memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1882         /* make the request */
1883
1884         if (serial->num_rx_urbs != 1) {
1885                 dev_err(&serial->parent->interface->dev,
1886                         "ERROR: mux'd reads with multiple buffers "
1887                         "not possible\n");
1888                 return 0;
1889         }
1890         return mux_device_request(serial,
1891                                   USB_CDC_GET_ENCAPSULATED_RESPONSE,
1892                                   serial->parent->port_spec & HSO_PORT_MASK,
1893                                   serial->rx_urb[0],
1894                                   &serial->ctrl_req_rx,
1895                                   serial->rx_data[0], serial->rx_data_length);
1896 }
1897
1898 /* used for muxed serial port callback (muxed serial read) */
1899 static void intr_callback(struct urb *urb)
1900 {
1901         struct hso_shared_int *shared_int = urb->context;
1902         struct hso_serial *serial;
1903         unsigned char *port_req;
1904         int status = urb->status;
1905         int i;
1906
1907         usb_mark_last_busy(urb->dev);
1908
1909         /* sanity check */
1910         if (!shared_int)
1911                 return;
1912
1913         /* status check */
1914         if (status) {
1915                 handle_usb_error(status, __func__, NULL);
1916                 return;
1917         }
1918         D4("\n--- Got intr callback 0x%02X ---", status);
1919
1920         /* what request? */
1921         port_req = urb->transfer_buffer;
1922         D4(" port_req = 0x%.2X\n", *port_req);
1923         /* loop over all muxed ports to find the one sending this */
1924         for (i = 0; i < 8; i++) {
1925                 /* max 8 channels on MUX */
1926                 if (*port_req & (1 << i)) {
1927                         serial = get_serial_by_shared_int_and_type(shared_int,
1928                                                                    (1 << i));
1929                         if (serial != NULL) {
1930                                 D1("Pending read interrupt on port %d\n", i);
1931                                 spin_lock(&serial->serial_lock);
1932                                 if (serial->rx_state == RX_IDLE &&
1933                                         serial->open_count > 0) {
1934                                         /* Setup and send a ctrl req read on
1935                                          * port i */
1936                                         if (!serial->rx_urb_filled[0]) {
1937                                                 serial->rx_state = RX_SENT;
1938                                                 hso_mux_serial_read(serial);
1939                                         } else
1940                                                 serial->rx_state = RX_PENDING;
1941                                 } else {
1942                                         D1("Already a read pending on "
1943                                            "port %d or port not open\n", i);
1944                                 }
1945                                 spin_unlock(&serial->serial_lock);
1946                         }
1947                 }
1948         }
1949         /* Resubmit interrupt urb */
1950         hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1951 }
1952
1953 /* called for writing to muxed serial port */
1954 static int hso_mux_serial_write_data(struct hso_serial *serial)
1955 {
1956         if (NULL == serial)
1957                 return -EINVAL;
1958
1959         return mux_device_request(serial,
1960                                   USB_CDC_SEND_ENCAPSULATED_COMMAND,
1961                                   serial->parent->port_spec & HSO_PORT_MASK,
1962                                   serial->tx_urb,
1963                                   &serial->ctrl_req_tx,
1964                                   serial->tx_data, serial->tx_data_count);
1965 }
1966
1967 /* write callback for Diag and CS port */
1968 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1969 {
1970         struct hso_serial *serial = urb->context;
1971         int status = urb->status;
1972         struct tty_struct *tty;
1973
1974         /* sanity check */
1975         if (!serial) {
1976                 D1("serial == NULL");
1977                 return;
1978         }
1979
1980         spin_lock(&serial->serial_lock);
1981         serial->tx_urb_used = 0;
1982         tty = tty_kref_get(serial->tty);
1983         spin_unlock(&serial->serial_lock);
1984         if (status) {
1985                 handle_usb_error(status, __func__, serial->parent);
1986                 tty_kref_put(tty);
1987                 return;
1988         }
1989         hso_put_activity(serial->parent);
1990         if (tty) {
1991                 tty_wakeup(tty);
1992                 tty_kref_put(tty);
1993         }
1994         hso_kick_transmit(serial);
1995
1996         D1(" ");
1997         return;
1998 }
1999
2000 /* called for writing diag or CS serial port */
2001 static int hso_std_serial_write_data(struct hso_serial *serial)
2002 {
2003         int count = serial->tx_data_count;
2004         int result;
2005
2006         usb_fill_bulk_urb(serial->tx_urb,
2007                           serial->parent->usb,
2008                           usb_sndbulkpipe(serial->parent->usb,
2009                                           serial->out_endp->
2010                                           bEndpointAddress & 0x7F),
2011                           serial->tx_data, serial->tx_data_count,
2012                           hso_std_serial_write_bulk_callback, serial);
2013
2014         result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
2015         if (result) {
2016                 dev_warn(&serial->parent->usb->dev,
2017                          "Failed to submit urb - res %d\n", result);
2018                 return result;
2019         }
2020
2021         return count;
2022 }
2023
2024 /* callback after read or write on muxed serial port */
2025 static void ctrl_callback(struct urb *urb)
2026 {
2027         struct hso_serial *serial = urb->context;
2028         struct usb_ctrlrequest *req;
2029         int status = urb->status;
2030         struct tty_struct *tty;
2031
2032         /* sanity check */
2033         if (!serial)
2034                 return;
2035
2036         spin_lock(&serial->serial_lock);
2037         serial->tx_urb_used = 0;
2038         tty = tty_kref_get(serial->tty);
2039         spin_unlock(&serial->serial_lock);
2040         if (status) {
2041                 handle_usb_error(status, __func__, serial->parent);
2042                 tty_kref_put(tty);
2043                 return;
2044         }
2045
2046         /* what request? */
2047         req = (struct usb_ctrlrequest *)(urb->setup_packet);
2048         D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2049         D4("Actual length of urb = %d\n", urb->actual_length);
2050         DUMP1(urb->transfer_buffer, urb->actual_length);
2051
2052         if (req->bRequestType ==
2053             (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2054                 /* response to a read command */
2055                 serial->rx_urb_filled[0] = 1;
2056                 spin_lock(&serial->serial_lock);
2057                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2058                 spin_unlock(&serial->serial_lock);
2059         } else {
2060                 hso_put_activity(serial->parent);
2061                 if (tty)
2062                         tty_wakeup(tty);
2063                 /* response to a write command */
2064                 hso_kick_transmit(serial);
2065         }
2066         tty_kref_put(tty);
2067 }
2068
2069 /* handle RX data for serial port */
2070 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2071 {
2072         struct tty_struct *tty;
2073         int write_length_remaining = 0;
2074         int curr_write_len;
2075
2076         /* Sanity check */
2077         if (urb == NULL || serial == NULL) {
2078                 D1("serial = NULL");
2079                 return -2;
2080         }
2081
2082         /* All callers to put_rxbuf_data hold serial_lock */
2083         tty = tty_kref_get(serial->tty);
2084
2085         /* Push data to tty */
2086         if (tty) {
2087                 write_length_remaining = urb->actual_length -
2088                         serial->curr_rx_urb_offset;
2089                 D1("data to push to tty");
2090                 while (write_length_remaining) {
2091                         if (test_bit(TTY_THROTTLED, &tty->flags)) {
2092                                 tty_kref_put(tty);
2093                                 return -1;
2094                         }
2095                         curr_write_len =  tty_insert_flip_string
2096                                 (tty, urb->transfer_buffer +
2097                                  serial->curr_rx_urb_offset,
2098                                  write_length_remaining);
2099                         serial->curr_rx_urb_offset += curr_write_len;
2100                         write_length_remaining -= curr_write_len;
2101                         tty_flip_buffer_push(tty);
2102                 }
2103         }
2104         if (write_length_remaining == 0) {
2105                 serial->curr_rx_urb_offset = 0;
2106                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2107         }
2108         tty_kref_put(tty);
2109         return write_length_remaining;
2110 }
2111
2112
2113 /* Base driver functions */
2114
2115 static void hso_log_port(struct hso_device *hso_dev)
2116 {
2117         char *port_type;
2118         char port_dev[20];
2119
2120         switch (hso_dev->port_spec & HSO_PORT_MASK) {
2121         case HSO_PORT_CONTROL:
2122                 port_type = "Control";
2123                 break;
2124         case HSO_PORT_APP:
2125                 port_type = "Application";
2126                 break;
2127         case HSO_PORT_GPS:
2128                 port_type = "GPS";
2129                 break;
2130         case HSO_PORT_GPS_CONTROL:
2131                 port_type = "GPS control";
2132                 break;
2133         case HSO_PORT_APP2:
2134                 port_type = "Application2";
2135                 break;
2136         case HSO_PORT_PCSC:
2137                 port_type = "PCSC";
2138                 break;
2139         case HSO_PORT_DIAG:
2140                 port_type = "Diagnostic";
2141                 break;
2142         case HSO_PORT_DIAG2:
2143                 port_type = "Diagnostic2";
2144                 break;
2145         case HSO_PORT_MODEM:
2146                 port_type = "Modem";
2147                 break;
2148         case HSO_PORT_NETWORK:
2149                 port_type = "Network";
2150                 break;
2151         default:
2152                 port_type = "Unknown";
2153                 break;
2154         }
2155         if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2156                 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2157         } else
2158                 sprintf(port_dev, "/dev/%s%d", tty_filename,
2159                         dev2ser(hso_dev)->minor);
2160
2161         dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2162                 port_type, port_dev);
2163 }
2164
2165 static int hso_start_net_device(struct hso_device *hso_dev)
2166 {
2167         int i, result = 0;
2168         struct hso_net *hso_net = dev2net(hso_dev);
2169
2170         if (!hso_net)
2171                 return -ENODEV;
2172
2173         /* send URBs for all read buffers */
2174         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2175
2176                 /* Prep a receive URB */
2177                 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2178                                   hso_dev->usb,
2179                                   usb_rcvbulkpipe(hso_dev->usb,
2180                                                   hso_net->in_endp->
2181                                                   bEndpointAddress & 0x7F),
2182                                   hso_net->mux_bulk_rx_buf_pool[i],
2183                                   MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2184                                   hso_net);
2185
2186                 /* Put it out there so the device can send us stuff */
2187                 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2188                                         GFP_NOIO);
2189                 if (result)
2190                         dev_warn(&hso_dev->usb->dev,
2191                                 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2192                                 i, result);
2193         }
2194
2195         return result;
2196 }
2197
2198 static int hso_stop_net_device(struct hso_device *hso_dev)
2199 {
2200         int i;
2201         struct hso_net *hso_net = dev2net(hso_dev);
2202
2203         if (!hso_net)
2204                 return -ENODEV;
2205
2206         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2207                 if (hso_net->mux_bulk_rx_urb_pool[i])
2208                         usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2209
2210         }
2211         if (hso_net->mux_bulk_tx_urb)
2212                 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2213
2214         return 0;
2215 }
2216
2217 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2218 {
2219         int i, result = 0;
2220         struct hso_serial *serial = dev2ser(hso_dev);
2221
2222         if (!serial)
2223                 return -ENODEV;
2224
2225         /* If it is not the MUX port fill in and submit a bulk urb (already
2226          * allocated in hso_serial_start) */
2227         if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2228                 for (i = 0; i < serial->num_rx_urbs; i++) {
2229                         usb_fill_bulk_urb(serial->rx_urb[i],
2230                                           serial->parent->usb,
2231                                           usb_rcvbulkpipe(serial->parent->usb,
2232                                                           serial->in_endp->
2233                                                           bEndpointAddress &
2234                                                           0x7F),
2235                                           serial->rx_data[i],
2236                                           serial->rx_data_length,
2237                                           hso_std_serial_read_bulk_callback,
2238                                           serial);
2239                         result = usb_submit_urb(serial->rx_urb[i], flags);
2240                         if (result) {
2241                                 dev_warn(&serial->parent->usb->dev,
2242                                          "Failed to submit urb - res %d\n",
2243                                          result);
2244                                 break;
2245                         }
2246                 }
2247         } else {
2248                 mutex_lock(&serial->shared_int->shared_int_lock);
2249                 if (!serial->shared_int->use_count) {
2250                         result =
2251                             hso_mux_submit_intr_urb(serial->shared_int,
2252                                                     hso_dev->usb, flags);
2253                 }
2254                 serial->shared_int->use_count++;
2255                 mutex_unlock(&serial->shared_int->shared_int_lock);
2256         }
2257         if (serial->tiocmget)
2258                 tiocmget_submit_urb(serial,
2259                                     serial->tiocmget,
2260                                     serial->parent->usb);
2261         return result;
2262 }
2263
2264 static int hso_stop_serial_device(struct hso_device *hso_dev)
2265 {
2266         int i;
2267         struct hso_serial *serial = dev2ser(hso_dev);
2268         struct hso_tiocmget  *tiocmget;
2269
2270         if (!serial)
2271                 return -ENODEV;
2272
2273         for (i = 0; i < serial->num_rx_urbs; i++) {
2274                 if (serial->rx_urb[i]) {
2275                                 usb_kill_urb(serial->rx_urb[i]);
2276                                 serial->rx_urb_filled[i] = 0;
2277                 }
2278         }
2279         serial->curr_rx_urb_idx = 0;
2280         serial->curr_rx_urb_offset = 0;
2281
2282         if (serial->tx_urb)
2283                 usb_kill_urb(serial->tx_urb);
2284
2285         if (serial->shared_int) {
2286                 mutex_lock(&serial->shared_int->shared_int_lock);
2287                 if (serial->shared_int->use_count &&
2288                     (--serial->shared_int->use_count == 0)) {
2289                         struct urb *urb;
2290
2291                         urb = serial->shared_int->shared_intr_urb;
2292                         if (urb)
2293                                 usb_kill_urb(urb);
2294                 }
2295                 mutex_unlock(&serial->shared_int->shared_int_lock);
2296         }
2297         tiocmget = serial->tiocmget;
2298         if (tiocmget) {
2299                 wake_up_interruptible(&tiocmget->waitq);
2300                 usb_kill_urb(tiocmget->urb);
2301         }
2302
2303         return 0;
2304 }
2305
2306 static void hso_serial_common_free(struct hso_serial *serial)
2307 {
2308         int i;
2309
2310         if (serial->parent->dev)
2311                 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2312
2313         tty_unregister_device(tty_drv, serial->minor);
2314
2315         for (i = 0; i < serial->num_rx_urbs; i++) {
2316                 /* unlink and free RX URB */
2317                 usb_free_urb(serial->rx_urb[i]);
2318                 /* free the RX buffer */
2319                 kfree(serial->rx_data[i]);
2320         }
2321
2322         /* unlink and free TX URB */
2323         usb_free_urb(serial->tx_urb);
2324         kfree(serial->tx_data);
2325 }
2326
2327 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2328                                     int rx_size, int tx_size)
2329 {
2330         struct device *dev;
2331         int minor;
2332         int i;
2333
2334         minor = get_free_serial_index();
2335         if (minor < 0)
2336                 goto exit;
2337
2338         /* register our minor number */
2339         serial->parent->dev = tty_register_device(tty_drv, minor,
2340                                         &serial->parent->interface->dev);
2341         dev = serial->parent->dev;
2342         dev_set_drvdata(dev, serial->parent);
2343         i = device_create_file(dev, &dev_attr_hsotype);
2344
2345         /* fill in specific data for later use */
2346         serial->minor = minor;
2347         serial->magic = HSO_SERIAL_MAGIC;
2348         spin_lock_init(&serial->serial_lock);
2349         serial->num_rx_urbs = num_urbs;
2350
2351         /* RX, allocate urb and initialize */
2352
2353         /* prepare our RX buffer */
2354         serial->rx_data_length = rx_size;
2355         for (i = 0; i < serial->num_rx_urbs; i++) {
2356                 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2357                 if (!serial->rx_urb[i]) {
2358                         dev_err(dev, "Could not allocate urb?\n");
2359                         goto exit;
2360                 }
2361                 serial->rx_urb[i]->transfer_buffer = NULL;
2362                 serial->rx_urb[i]->transfer_buffer_length = 0;
2363                 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2364                                              GFP_KERNEL);
2365                 if (!serial->rx_data[i]) {
2366                         dev_err(dev, "%s - Out of memory\n", __func__);
2367                         goto exit;
2368                 }
2369         }
2370
2371         /* TX, allocate urb and initialize */
2372         serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2373         if (!serial->tx_urb) {
2374                 dev_err(dev, "Could not allocate urb?\n");
2375                 goto exit;
2376         }
2377         serial->tx_urb->transfer_buffer = NULL;
2378         serial->tx_urb->transfer_buffer_length = 0;
2379         /* prepare our TX buffer */
2380         serial->tx_data_count = 0;
2381         serial->tx_buffer_count = 0;
2382         serial->tx_data_length = tx_size;
2383         serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2384         if (!serial->tx_data) {
2385                 dev_err(dev, "%s - Out of memory\n", __func__);
2386                 goto exit;
2387         }
2388         serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2389         if (!serial->tx_buffer) {
2390                 dev_err(dev, "%s - Out of memory\n", __func__);
2391                 goto exit;
2392         }
2393
2394         return 0;
2395 exit:
2396         hso_serial_common_free(serial);
2397         return -1;
2398 }
2399
2400 /* Creates a general hso device */
2401 static struct hso_device *hso_create_device(struct usb_interface *intf,
2402                                             int port_spec)
2403 {
2404         struct hso_device *hso_dev;
2405
2406         hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2407         if (!hso_dev)
2408                 return NULL;
2409
2410         hso_dev->port_spec = port_spec;
2411         hso_dev->usb = interface_to_usbdev(intf);
2412         hso_dev->interface = intf;
2413         kref_init(&hso_dev->ref);
2414         mutex_init(&hso_dev->mutex);
2415
2416         INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2417         INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2418         INIT_WORK(&hso_dev->reset_device, reset_device);
2419
2420         return hso_dev;
2421 }
2422
2423 /* Removes a network device in the network device table */
2424 static int remove_net_device(struct hso_device *hso_dev)
2425 {
2426         int i;
2427
2428         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2429                 if (network_table[i] == hso_dev) {
2430                         network_table[i] = NULL;
2431                         break;
2432                 }
2433         }
2434         if (i == HSO_MAX_NET_DEVICES)
2435                 return -1;
2436         return 0;
2437 }
2438
2439 /* Frees our network device */
2440 static void hso_free_net_device(struct hso_device *hso_dev)
2441 {
2442         int i;
2443         struct hso_net *hso_net = dev2net(hso_dev);
2444
2445         if (!hso_net)
2446                 return;
2447
2448         remove_net_device(hso_net->parent);
2449
2450         if (hso_net->net) {
2451                 unregister_netdev(hso_net->net);
2452                 free_netdev(hso_net->net);
2453         }
2454
2455         /* start freeing */
2456         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2457                 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2458                 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2459                 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2460         }
2461         usb_free_urb(hso_net->mux_bulk_tx_urb);
2462         kfree(hso_net->mux_bulk_tx_buf);
2463         hso_net->mux_bulk_tx_buf = NULL;
2464
2465         kfree(hso_dev);
2466 }
2467
2468 static const struct net_device_ops hso_netdev_ops = {
2469         .ndo_open       = hso_net_open,
2470         .ndo_stop       = hso_net_close,
2471         .ndo_start_xmit = hso_net_start_xmit,
2472         .ndo_tx_timeout = hso_net_tx_timeout,
2473 };
2474
2475 /* initialize the network interface */
2476 static void hso_net_init(struct net_device *net)
2477 {
2478         struct hso_net *hso_net = netdev_priv(net);
2479
2480         D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2481
2482         /* fill in the other fields */
2483         net->netdev_ops = &hso_netdev_ops;
2484         net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2485         net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2486         net->type = ARPHRD_NONE;
2487         net->mtu = DEFAULT_MTU - 14;
2488         net->tx_queue_len = 10;
2489         SET_ETHTOOL_OPS(net, &ops);
2490
2491         /* and initialize the semaphore */
2492         spin_lock_init(&hso_net->net_lock);
2493 }
2494
2495 /* Adds a network device in the network device table */
2496 static int add_net_device(struct hso_device *hso_dev)
2497 {
2498         int i;
2499
2500         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2501                 if (network_table[i] == NULL) {
2502                         network_table[i] = hso_dev;
2503                         break;
2504                 }
2505         }
2506         if (i == HSO_MAX_NET_DEVICES)
2507                 return -1;
2508         return 0;
2509 }
2510
2511 static int hso_rfkill_set_block(void *data, bool blocked)
2512 {
2513         struct hso_device *hso_dev = data;
2514         int enabled = !blocked;
2515         int rv;
2516
2517         mutex_lock(&hso_dev->mutex);
2518         if (hso_dev->usb_gone)
2519                 rv = 0;
2520         else
2521                 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2522                                        enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2523                                        USB_CTRL_SET_TIMEOUT);
2524         mutex_unlock(&hso_dev->mutex);
2525         return rv;
2526 }
2527
2528 static const struct rfkill_ops hso_rfkill_ops = {
2529         .set_block = hso_rfkill_set_block,
2530 };
2531
2532 /* Creates and sets up everything for rfkill */
2533 static void hso_create_rfkill(struct hso_device *hso_dev,
2534                              struct usb_interface *interface)
2535 {
2536         struct hso_net *hso_net = dev2net(hso_dev);
2537         struct device *dev = &hso_net->net->dev;
2538         char *rfkn;
2539
2540         rfkn = kzalloc(20, GFP_KERNEL);
2541         if (!rfkn)
2542                 dev_err(dev, "%s - Out of memory\n", __func__);
2543
2544         snprintf(rfkn, 20, "hso-%d",
2545                  interface->altsetting->desc.bInterfaceNumber);
2546
2547         hso_net->rfkill = rfkill_alloc(rfkn,
2548                                        &interface_to_usbdev(interface)->dev,
2549                                        RFKILL_TYPE_WWAN,
2550                                        &hso_rfkill_ops, hso_dev);
2551         if (!hso_net->rfkill) {
2552                 dev_err(dev, "%s - Out of memory\n", __func__);
2553                 kfree(rfkn);
2554                 return;
2555         }
2556         if (rfkill_register(hso_net->rfkill) < 0) {
2557                 rfkill_destroy(hso_net->rfkill);
2558                 kfree(rfkn);
2559                 hso_net->rfkill = NULL;
2560                 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2561                 return;
2562         }
2563 }
2564
2565 static struct device_type hso_type = {
2566         .name   = "wwan",
2567 };
2568
2569 /* Creates our network device */
2570 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2571                                                 int port_spec)
2572 {
2573         int result, i;
2574         struct net_device *net;
2575         struct hso_net *hso_net;
2576         struct hso_device *hso_dev;
2577
2578         hso_dev = hso_create_device(interface, port_spec);
2579         if (!hso_dev)
2580                 return NULL;
2581
2582         /* allocate our network device, then we can put in our private data */
2583         /* call hso_net_init to do the basic initialization */
2584         net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2585         if (!net) {
2586                 dev_err(&interface->dev, "Unable to create ethernet device\n");
2587                 goto exit;
2588         }
2589
2590         hso_net = netdev_priv(net);
2591
2592         hso_dev->port_data.dev_net = hso_net;
2593         hso_net->net = net;
2594         hso_net->parent = hso_dev;
2595
2596         hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2597                                       USB_DIR_IN);
2598         if (!hso_net->in_endp) {
2599                 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2600                 goto exit;
2601         }
2602         hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2603                                        USB_DIR_OUT);
2604         if (!hso_net->out_endp) {
2605                 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2606                 goto exit;
2607         }
2608         SET_NETDEV_DEV(net, &interface->dev);
2609         SET_NETDEV_DEVTYPE(net, &hso_type);
2610
2611         /* registering our net device */
2612         result = register_netdev(net);
2613         if (result) {
2614                 dev_err(&interface->dev, "Failed to register device\n");
2615                 goto exit;
2616         }
2617
2618         /* start allocating */
2619         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2620                 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2621                 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2622                         dev_err(&interface->dev, "Could not allocate rx urb\n");
2623                         goto exit;
2624                 }
2625                 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2626                                                            GFP_KERNEL);
2627                 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2628                         dev_err(&interface->dev, "Could not allocate rx buf\n");
2629                         goto exit;
2630                 }
2631         }
2632         hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2633         if (!hso_net->mux_bulk_tx_urb) {
2634                 dev_err(&interface->dev, "Could not allocate tx urb\n");
2635                 goto exit;
2636         }
2637         hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2638         if (!hso_net->mux_bulk_tx_buf) {
2639                 dev_err(&interface->dev, "Could not allocate tx buf\n");
2640                 goto exit;
2641         }
2642
2643         add_net_device(hso_dev);
2644
2645         hso_log_port(hso_dev);
2646
2647         hso_create_rfkill(hso_dev, interface);
2648
2649         return hso_dev;
2650 exit:
2651         hso_free_net_device(hso_dev);
2652         return NULL;
2653 }
2654
2655 static void hso_free_tiomget(struct hso_serial *serial)
2656 {
2657         struct hso_tiocmget *tiocmget = serial->tiocmget;
2658         if (tiocmget) {
2659                 if (tiocmget->urb) {
2660                         usb_free_urb(tiocmget->urb);
2661                         tiocmget->urb = NULL;
2662                 }
2663                 serial->tiocmget = NULL;
2664                 kfree(tiocmget);
2665
2666         }
2667 }
2668
2669 /* Frees an AT channel ( goes for both mux and non-mux ) */
2670 static void hso_free_serial_device(struct hso_device *hso_dev)
2671 {
2672         struct hso_serial *serial = dev2ser(hso_dev);
2673
2674         if (!serial)
2675                 return;
2676         set_serial_by_index(serial->minor, NULL);
2677
2678         hso_serial_common_free(serial);
2679
2680         if (serial->shared_int) {
2681                 mutex_lock(&serial->shared_int->shared_int_lock);
2682                 if (--serial->shared_int->ref_count == 0)
2683                         hso_free_shared_int(serial->shared_int);
2684                 else
2685                         mutex_unlock(&serial->shared_int->shared_int_lock);
2686         }
2687         hso_free_tiomget(serial);
2688         kfree(serial);
2689         kfree(hso_dev);
2690 }
2691
2692 /* Creates a bulk AT channel */
2693 static struct hso_device *hso_create_bulk_serial_device(
2694                         struct usb_interface *interface, int port)
2695 {
2696         struct hso_device *hso_dev;
2697         struct hso_serial *serial;
2698         int num_urbs;
2699         struct hso_tiocmget *tiocmget;
2700
2701         hso_dev = hso_create_device(interface, port);
2702         if (!hso_dev)
2703                 return NULL;
2704
2705         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2706         if (!serial)
2707                 goto exit;
2708
2709         serial->parent = hso_dev;
2710         hso_dev->port_data.dev_serial = serial;
2711
2712         if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2713                 num_urbs = 2;
2714                 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2715                                            GFP_KERNEL);
2716                 /* it isn't going to break our heart if serial->tiocmget
2717                  *  allocation fails don't bother checking this.
2718                  */
2719                 if (serial->tiocmget) {
2720                         tiocmget = serial->tiocmget;
2721                         tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2722                         if (tiocmget->urb) {
2723                                 mutex_init(&tiocmget->mutex);
2724                                 init_waitqueue_head(&tiocmget->waitq);
2725                                 tiocmget->endp = hso_get_ep(
2726                                         interface,
2727                                         USB_ENDPOINT_XFER_INT,
2728                                         USB_DIR_IN);
2729                         } else
2730                                 hso_free_tiomget(serial);
2731                 }
2732         }
2733         else
2734                 num_urbs = 1;
2735
2736         if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2737                                      BULK_URB_TX_SIZE))
2738                 goto exit;
2739
2740         serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2741                                      USB_DIR_IN);
2742         if (!serial->in_endp) {
2743                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2744                 goto exit2;
2745         }
2746
2747         if (!
2748             (serial->out_endp =
2749              hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2750                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2751                 goto exit2;
2752         }
2753
2754         serial->write_data = hso_std_serial_write_data;
2755
2756         /* and record this serial */
2757         set_serial_by_index(serial->minor, serial);
2758
2759         /* setup the proc dirs and files if needed */
2760         hso_log_port(hso_dev);
2761
2762         /* done, return it */
2763         return hso_dev;
2764
2765 exit2:
2766         hso_serial_common_free(serial);
2767 exit:
2768         hso_free_tiomget(serial);
2769         kfree(serial);
2770         kfree(hso_dev);
2771         return NULL;
2772 }
2773
2774 /* Creates a multiplexed AT channel */
2775 static
2776 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2777                                                 int port,
2778                                                 struct hso_shared_int *mux)
2779 {
2780         struct hso_device *hso_dev;
2781         struct hso_serial *serial;
2782         int port_spec;
2783
2784         port_spec = HSO_INTF_MUX;
2785         port_spec &= ~HSO_PORT_MASK;
2786
2787         port_spec |= hso_mux_to_port(port);
2788         if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2789                 return NULL;
2790
2791         hso_dev = hso_create_device(interface, port_spec);
2792         if (!hso_dev)
2793                 return NULL;
2794
2795         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2796         if (!serial)
2797                 goto exit;
2798
2799         hso_dev->port_data.dev_serial = serial;
2800         serial->parent = hso_dev;
2801
2802         if (hso_serial_common_create
2803             (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2804                 goto exit;
2805
2806         serial->tx_data_length--;
2807         serial->write_data = hso_mux_serial_write_data;
2808
2809         serial->shared_int = mux;
2810         mutex_lock(&serial->shared_int->shared_int_lock);
2811         serial->shared_int->ref_count++;
2812         mutex_unlock(&serial->shared_int->shared_int_lock);
2813
2814         /* and record this serial */
2815         set_serial_by_index(serial->minor, serial);
2816
2817         /* setup the proc dirs and files if needed */
2818         hso_log_port(hso_dev);
2819
2820         /* done, return it */
2821         return hso_dev;
2822
2823 exit:
2824         if (serial) {
2825                 tty_unregister_device(tty_drv, serial->minor);
2826                 kfree(serial);
2827         }
2828         if (hso_dev)
2829                 kfree(hso_dev);
2830         return NULL;
2831
2832 }
2833
2834 static void hso_free_shared_int(struct hso_shared_int *mux)
2835 {
2836         usb_free_urb(mux->shared_intr_urb);
2837         kfree(mux->shared_intr_buf);
2838         mutex_unlock(&mux->shared_int_lock);
2839         kfree(mux);
2840 }
2841
2842 static
2843 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2844 {
2845         struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2846
2847         if (!mux)
2848                 return NULL;
2849
2850         mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2851                                     USB_DIR_IN);
2852         if (!mux->intr_endp) {
2853                 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2854                 goto exit;
2855         }
2856
2857         mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2858         if (!mux->shared_intr_urb) {
2859                 dev_err(&interface->dev, "Could not allocate intr urb?\n");
2860                 goto exit;
2861         }
2862         mux->shared_intr_buf =
2863                 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2864                         GFP_KERNEL);
2865         if (!mux->shared_intr_buf) {
2866                 dev_err(&interface->dev, "Could not allocate intr buf?\n");
2867                 goto exit;
2868         }
2869
2870         mutex_init(&mux->shared_int_lock);
2871
2872         return mux;
2873
2874 exit:
2875         kfree(mux->shared_intr_buf);
2876         usb_free_urb(mux->shared_intr_urb);
2877         kfree(mux);
2878         return NULL;
2879 }
2880
2881 /* Gets the port spec for a certain interface */
2882 static int hso_get_config_data(struct usb_interface *interface)
2883 {
2884         struct usb_device *usbdev = interface_to_usbdev(interface);
2885         u8 config_data[17];
2886         u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2887         s32 result;
2888
2889         if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2890                             0x86, 0xC0, 0, 0, config_data, 17,
2891                             USB_CTRL_SET_TIMEOUT) != 0x11) {
2892                 return -EIO;
2893         }
2894
2895         switch (config_data[if_num]) {
2896         case 0x0:
2897                 result = 0;
2898                 break;
2899         case 0x1:
2900                 result = HSO_PORT_DIAG;
2901                 break;
2902         case 0x2:
2903                 result = HSO_PORT_GPS;
2904                 break;
2905         case 0x3:
2906                 result = HSO_PORT_GPS_CONTROL;
2907                 break;
2908         case 0x4:
2909                 result = HSO_PORT_APP;
2910                 break;
2911         case 0x5:
2912                 result = HSO_PORT_APP2;
2913                 break;
2914         case 0x6:
2915                 result = HSO_PORT_CONTROL;
2916                 break;
2917         case 0x7:
2918                 result = HSO_PORT_NETWORK;
2919                 break;
2920         case 0x8:
2921                 result = HSO_PORT_MODEM;
2922                 break;
2923         case 0x9:
2924                 result = HSO_PORT_MSD;
2925                 break;
2926         case 0xa:
2927                 result = HSO_PORT_PCSC;
2928                 break;
2929         case 0xb:
2930                 result = HSO_PORT_VOICE;
2931                 break;
2932         default:
2933                 result = 0;
2934         }
2935
2936         if (result)
2937                 result |= HSO_INTF_BULK;
2938
2939         if (config_data[16] & 0x1)
2940                 result |= HSO_INFO_CRC_BUG;
2941
2942         return result;
2943 }
2944
2945 /* called once for each interface upon device insertion */
2946 static int hso_probe(struct usb_interface *interface,
2947                      const struct usb_device_id *id)
2948 {
2949         int mux, i, if_num, port_spec;
2950         unsigned char port_mask;
2951         struct hso_device *hso_dev = NULL;
2952         struct hso_shared_int *shared_int;
2953         struct hso_device *tmp_dev = NULL;
2954
2955         if_num = interface->altsetting->desc.bInterfaceNumber;
2956
2957         /* Get the interface/port specification from either driver_info or from
2958          * the device itself */
2959         if (id->driver_info)
2960                 port_spec = ((u32 *)(id->driver_info))[if_num];
2961         else
2962                 port_spec = hso_get_config_data(interface);
2963
2964         if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2965                 dev_err(&interface->dev, "Not our interface\n");
2966                 return -ENODEV;
2967         }
2968         /* Check if we need to switch to alt interfaces prior to port
2969          * configuration */
2970         if (interface->num_altsetting > 1)
2971                 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2972         interface->needs_remote_wakeup = 1;
2973
2974         /* Allocate new hso device(s) */
2975         switch (port_spec & HSO_INTF_MASK) {
2976         case HSO_INTF_MUX:
2977                 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2978                         /* Create the network device */
2979                         if (!disable_net) {
2980                                 hso_dev = hso_create_net_device(interface,
2981                                                                 port_spec);
2982                                 if (!hso_dev)
2983                                         goto exit;
2984                                 tmp_dev = hso_dev;
2985                         }
2986                 }
2987
2988                 if (hso_get_mux_ports(interface, &port_mask))
2989                         /* TODO: de-allocate everything */
2990                         goto exit;
2991
2992                 shared_int = hso_create_shared_int(interface);
2993                 if (!shared_int)
2994                         goto exit;
2995
2996                 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2997                         if (port_mask & i) {
2998                                 hso_dev = hso_create_mux_serial_device(
2999                                                 interface, i, shared_int);
3000                                 if (!hso_dev)
3001                                         goto exit;
3002                         }
3003                 }
3004
3005                 if (tmp_dev)
3006                         hso_dev = tmp_dev;
3007                 break;
3008
3009         case HSO_INTF_BULK:
3010                 /* It's a regular bulk interface */
3011                 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) &&
3012                     !disable_net)
3013                         hso_dev = hso_create_net_device(interface, port_spec);
3014                 else
3015                         hso_dev =
3016                             hso_create_bulk_serial_device(interface, port_spec);
3017                 if (!hso_dev)
3018                         goto exit;
3019                 break;
3020         default:
3021                 goto exit;
3022         }
3023
3024         /* save our data pointer in this device */
3025         usb_set_intfdata(interface, hso_dev);
3026
3027         /* done */
3028         return 0;
3029 exit:
3030         hso_free_interface(interface);
3031         return -ENODEV;
3032 }
3033
3034 /* device removed, cleaning up */
3035 static void hso_disconnect(struct usb_interface *interface)
3036 {
3037         hso_free_interface(interface);
3038
3039         /* remove reference of our private data */
3040         usb_set_intfdata(interface, NULL);
3041 }
3042
3043 static void async_get_intf(struct work_struct *data)
3044 {
3045         struct hso_device *hso_dev =
3046             container_of(data, struct hso_device, async_get_intf);
3047         usb_autopm_get_interface(hso_dev->interface);
3048 }
3049
3050 static void async_put_intf(struct work_struct *data)
3051 {
3052         struct hso_device *hso_dev =
3053             container_of(data, struct hso_device, async_put_intf);
3054         usb_autopm_put_interface(hso_dev->interface);
3055 }
3056
3057 static int hso_get_activity(struct hso_device *hso_dev)
3058 {
3059         if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3060                 if (!hso_dev->is_active) {
3061                         hso_dev->is_active = 1;
3062                         schedule_work(&hso_dev->async_get_intf);
3063                 }
3064         }
3065
3066         if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3067                 return -EAGAIN;
3068
3069         usb_mark_last_busy(hso_dev->usb);
3070
3071         return 0;
3072 }
3073
3074 static int hso_put_activity(struct hso_device *hso_dev)
3075 {
3076         if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3077                 if (hso_dev->is_active) {
3078                         hso_dev->is_active = 0;
3079                         schedule_work(&hso_dev->async_put_intf);
3080                         return -EAGAIN;
3081                 }
3082         }
3083         hso_dev->is_active = 0;
3084         return 0;
3085 }
3086
3087 /* called by kernel when we need to suspend device */
3088 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3089 {
3090         int i, result;
3091
3092         /* Stop all serial ports */
3093         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3094                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3095                         result = hso_stop_serial_device(serial_table[i]);
3096                         if (result)
3097                                 goto out;
3098                 }
3099         }
3100
3101         /* Stop all network ports */
3102         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3103                 if (network_table[i] &&
3104                     (network_table[i]->interface == iface)) {
3105                         result = hso_stop_net_device(network_table[i]);
3106                         if (result)
3107                                 goto out;
3108                 }
3109         }
3110
3111 out:
3112         return 0;
3113 }
3114
3115 /* called by kernel when we need to resume device */
3116 static int hso_resume(struct usb_interface *iface)
3117 {
3118         int i, result = 0;
3119         struct hso_net *hso_net;
3120
3121         /* Start all serial ports */
3122         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3123                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3124                         if (dev2ser(serial_table[i])->open_count) {
3125                                 result =
3126                                     hso_start_serial_device(serial_table[i], GFP_NOIO);
3127                                 hso_kick_transmit(dev2ser(serial_table[i]));
3128                                 if (result)
3129                                         goto out;
3130                         }
3131                 }
3132         }
3133
3134         /* Start all network ports */
3135         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3136                 if (network_table[i] &&
3137                     (network_table[i]->interface == iface)) {
3138                         hso_net = dev2net(network_table[i]);
3139                         if (hso_net->flags & IFF_UP) {
3140                                 /* First transmit any lingering data,
3141                                    then restart the device. */
3142                                 if (hso_net->skb_tx_buf) {
3143                                         dev_dbg(&iface->dev,
3144                                                 "Transmitting"
3145                                                 " lingering data\n");
3146                                         hso_net_start_xmit(hso_net->skb_tx_buf,
3147                                                            hso_net->net);
3148                                         hso_net->skb_tx_buf = NULL;
3149                                 }
3150                                 result = hso_start_net_device(network_table[i]);
3151                                 if (result)
3152                                         goto out;
3153                         }
3154                 }
3155         }
3156
3157 out:
3158         return result;
3159 }
3160
3161 static void reset_device(struct work_struct *data)
3162 {
3163         struct hso_device *hso_dev =
3164             container_of(data, struct hso_device, reset_device);
3165         struct usb_device *usb = hso_dev->usb;
3166         int result;
3167
3168         if (hso_dev->usb_gone) {
3169                 D1("No reset during disconnect\n");
3170         } else {
3171                 result = usb_lock_device_for_reset(usb, hso_dev->interface);
3172                 if (result < 0)
3173                         D1("unable to lock device for reset: %d\n", result);
3174                 else {
3175                         usb_reset_device(usb);
3176                         usb_unlock_device(usb);
3177                 }
3178         }
3179 }
3180
3181 static void hso_serial_ref_free(struct kref *ref)
3182 {
3183         struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3184
3185         hso_free_serial_device(hso_dev);
3186 }
3187
3188 static void hso_free_interface(struct usb_interface *interface)
3189 {
3190         struct hso_serial *hso_dev;
3191         struct tty_struct *tty;
3192         int i;
3193
3194         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3195                 if (serial_table[i] &&
3196                     (serial_table[i]->interface == interface)) {
3197                         hso_dev = dev2ser(serial_table[i]);
3198                         spin_lock_irq(&hso_dev->serial_lock);
3199                         tty = tty_kref_get(hso_dev->tty);
3200                         spin_unlock_irq(&hso_dev->serial_lock);
3201                         if (tty)
3202                                 tty_hangup(tty);
3203                         mutex_lock(&hso_dev->parent->mutex);
3204                         tty_kref_put(tty);
3205                         hso_dev->parent->usb_gone = 1;
3206                         mutex_unlock(&hso_dev->parent->mutex);
3207                         kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3208                 }
3209         }
3210
3211         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3212                 if (network_table[i] &&
3213                     (network_table[i]->interface == interface)) {
3214                         struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3215                         /* hso_stop_net_device doesn't stop the net queue since
3216                          * traffic needs to start it again when suspended */
3217                         netif_stop_queue(dev2net(network_table[i])->net);
3218                         hso_stop_net_device(network_table[i]);
3219                         cancel_work_sync(&network_table[i]->async_put_intf);
3220                         cancel_work_sync(&network_table[i]->async_get_intf);
3221                         if (rfk) {
3222                                 rfkill_unregister(rfk);
3223                                 rfkill_destroy(rfk);
3224                         }
3225                         hso_free_net_device(network_table[i]);
3226                 }
3227         }
3228 }
3229
3230 /* Helper functions */
3231
3232 /* Get the endpoint ! */
3233 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3234                                                   int type, int dir)
3235 {
3236         int i;
3237         struct usb_host_interface *iface = intf->cur_altsetting;
3238         struct usb_endpoint_descriptor *endp;
3239
3240         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3241                 endp = &iface->endpoint[i].desc;
3242                 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3243                     (usb_endpoint_type(endp) == type))
3244                         return endp;
3245         }
3246
3247         return NULL;
3248 }
3249
3250 /* Get the byte that describes which ports are enabled */
3251 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3252 {
3253         int i;
3254         struct usb_host_interface *iface = intf->cur_altsetting;
3255
3256         if (iface->extralen == 3) {
3257                 *ports = iface->extra[2];
3258                 return 0;
3259         }
3260
3261         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3262                 if (iface->endpoint[i].extralen == 3) {
3263                         *ports = iface->endpoint[i].extra[2];
3264                         return 0;
3265                 }
3266         }
3267
3268         return -1;
3269 }
3270
3271 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3272 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3273                                    struct usb_device *usb, gfp_t gfp)
3274 {
3275         int result;
3276
3277         usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3278                          usb_rcvintpipe(usb,
3279                                 shared_int->intr_endp->bEndpointAddress & 0x7F),
3280                          shared_int->shared_intr_buf,
3281                          1,
3282                          intr_callback, shared_int,
3283                          shared_int->intr_endp->bInterval);
3284
3285         result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3286         if (result)
3287                 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3288                         result);
3289
3290         return result;
3291 }
3292
3293 /* operations setup of the serial interface */
3294 static const struct tty_operations hso_serial_ops = {
3295         .open = hso_serial_open,
3296         .close = hso_serial_close,
3297         .write = hso_serial_write,
3298         .write_room = hso_serial_write_room,
3299         .ioctl = hso_serial_ioctl,
3300         .set_termios = hso_serial_set_termios,
3301         .chars_in_buffer = hso_serial_chars_in_buffer,
3302         .tiocmget = hso_serial_tiocmget,
3303         .tiocmset = hso_serial_tiocmset,
3304         .unthrottle = hso_unthrottle
3305 };
3306
3307 static struct usb_driver hso_driver = {
3308         .name = driver_name,
3309         .probe = hso_probe,
3310         .disconnect = hso_disconnect,
3311         .id_table = hso_ids,
3312         .suspend = hso_suspend,
3313         .resume = hso_resume,
3314         .reset_resume = hso_resume,
3315         .supports_autosuspend = 1,
3316 };
3317
3318 static int __init hso_init(void)
3319 {
3320         int i;
3321         int result;
3322
3323         /* put it in the log */
3324         printk(KERN_INFO "hso: %s\n", version);
3325
3326         /* Initialise the serial table semaphore and table */
3327         spin_lock_init(&serial_table_lock);
3328         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3329                 serial_table[i] = NULL;
3330
3331         /* allocate our driver using the proper amount of supported minors */
3332         tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3333         if (!tty_drv)
3334                 return -ENOMEM;
3335
3336         /* fill in all needed values */
3337         tty_drv->magic = TTY_DRIVER_MAGIC;
3338         tty_drv->owner = THIS_MODULE;
3339         tty_drv->driver_name = driver_name;
3340         tty_drv->name = tty_filename;
3341
3342         /* if major number is provided as parameter, use that one */
3343         if (tty_major)
3344                 tty_drv->major = tty_major;
3345
3346         tty_drv->minor_start = 0;
3347         tty_drv->num = HSO_SERIAL_TTY_MINORS;
3348         tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3349         tty_drv->subtype = SERIAL_TYPE_NORMAL;
3350         tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3351         tty_drv->init_termios = tty_std_termios;
3352         hso_init_termios(&tty_drv->init_termios);
3353         tty_set_operations(tty_drv, &hso_serial_ops);
3354
3355         /* register the tty driver */
3356         result = tty_register_driver(tty_drv);
3357         if (result) {
3358                 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3359                         __func__, result);
3360                 return result;
3361         }
3362
3363         /* register this module as an usb driver */
3364         result = usb_register(&hso_driver);
3365         if (result) {
3366                 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3367                         result);
3368                 /* cleanup serial interface */
3369                 tty_unregister_driver(tty_drv);
3370                 return result;
3371         }
3372
3373         /* done */
3374         return 0;
3375 }
3376
3377 static void __exit hso_exit(void)
3378 {
3379         printk(KERN_INFO "hso: unloaded\n");
3380
3381         tty_unregister_driver(tty_drv);
3382         /* deregister the usb driver */
3383         usb_deregister(&hso_driver);
3384 }
3385
3386 /* Module definitions */
3387 module_init(hso_init);
3388 module_exit(hso_exit);
3389
3390 MODULE_AUTHOR(MOD_AUTHOR);
3391 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3392 MODULE_LICENSE(MOD_LICENSE);
3393 MODULE_INFO(Version, DRIVER_VERSION);
3394
3395 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3396 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3397 module_param(debug, int, S_IRUGO | S_IWUSR);
3398
3399 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3400 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3401 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3402
3403 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3404 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3405 module_param(disable_net, int, S_IRUGO | S_IWUSR);