drivers/net/usb/hso.c

   1 /******************************************************************************
   2  *
   3  * Driver for Option High Speed Mobile Devices.
   4  *
   5  *  Copyright (C) 2008 Option International
   6  *                     Filip Aben <f.aben@option.com>
   7  *                     Denis Joseph Barrow <d.barow@option.com>
   8  *                     Jan Dumon <j.dumon@option.com>
   9  *  Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
  10  *                      <ajb@spheresystems.co.uk>
  11  *  Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
  12  *  Copyright (C) 2008 Novell, Inc.
  13  *
  14  *  This program is free software; you can redistribute it and/or modify
  15  *  it under the terms of the GNU General Public License version 2 as
  16  *  published by the Free Software Foundation.
  17  *
  18  *  This program is distributed in the hope that it will be useful,
  19  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  *  GNU General Public License for more details.
  22  *
  23  *  You should have received a copy of the GNU General Public License
  24  *  along with this program; if not, write to the Free Software
  25  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  26  *  USA
  27  *
  28  *
  29  *****************************************************************************/
  30
  31 /******************************************************************************
  32  *
  33  * Description of the device:
  34  *
  35  * Interface 0: Contains the IP network interface on the bulk end points.
  36  *              The multiplexed serial ports are using the interrupt and
  37  *              control endpoints.
  38  *              Interrupt contains a bitmap telling which multiplexed
  39  *              serialport needs servicing.
  40  *
  41  * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
  42  *              port is opened, as this have a huge impact on the network port
  43  *              throughput.
  44  *
  45  * Interface 2: Standard modem interface - circuit switched interface, this
  46  *              can be used to make a standard ppp connection however it
  47  *              should not be used in conjunction with the IP network interface
  48  *              enabled for USB performance reasons i.e. if using this set
  49  *              ideally disable_net=1.
  50  *
  51  *****************************************************************************/
  52
  53 #include <linux/sched.h>
  54 #include <linux/slab.h>
  55 #include <linux/init.h>
  56 #include <linux/delay.h>
  57 #include <linux/netdevice.h>
  58 #include <linux/module.h>
  59 #include <linux/ethtool.h>
  60 #include <linux/usb.h>
  61 #include <linux/timer.h>
  62 #include <linux/tty.h>
  63 #include <linux/tty_driver.h>
  64 #include <linux/tty_flip.h>
  65 #include <linux/kmod.h>
  66 #include <linux/rfkill.h>
  67 #include <linux/ip.h>
  68 #include <linux/uaccess.h>
  69 #include <linux/usb/cdc.h>
  70 #include <net/arp.h>
  71 #include <asm/byteorder.h>
  72 #include <linux/serial_core.h>
  73 #include <linux/serial.h>
  74
  75
  76 #define MOD_AUTHOR                      "Option Wireless"
  77 #define MOD_DESCRIPTION                 "USB High Speed Option driver"
  78 #define MOD_LICENSE                     "GPL"
  79
  80 #define HSO_MAX_NET_DEVICES             10
  81 #define HSO__MAX_MTU                    2048
  82 #define DEFAULT_MTU                     1500
  83 #define DEFAULT_MRU                     1500
  84
  85 #define CTRL_URB_RX_SIZE                1024
  86 #define CTRL_URB_TX_SIZE                64
  87
  88 #define BULK_URB_RX_SIZE                4096
  89 #define BULK_URB_TX_SIZE                8192
  90
  91 #define MUX_BULK_RX_BUF_SIZE            HSO__MAX_MTU
  92 #define MUX_BULK_TX_BUF_SIZE            HSO__MAX_MTU
  93 #define MUX_BULK_RX_BUF_COUNT           4
  94 #define USB_TYPE_OPTION_VENDOR          0x20
  95
  96 /* These definitions are used with the struct hso_net flags element */
  97 /* - use *_bit operations on it. (bit indices not values.) */
  98 #define HSO_NET_RUNNING                 0
  99
 100 #define HSO_NET_TX_TIMEOUT              (HZ*10)
 101
 102 #define HSO_SERIAL_MAGIC                0x48534f31
 103
 104 /* Number of ttys to handle */
 105 #define HSO_SERIAL_TTY_MINORS           256
 106
 107 #define MAX_RX_URBS                     2
 108
 109 static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty)
 110 {
 111         if (tty)
 112                 return tty->driver_data;
 113         return NULL;
 114 }
 115
 116 /*****************************************************************************/
 117 /* Debugging functions                                                       */
 118 /*****************************************************************************/
 119 #define D__(lvl_, fmt, arg...)                          \
 120         do {                                            \
 121                 printk(lvl_ "[%d:%s]: " fmt "\n",       \
 122                        __LINE__, __func__, ## arg);     \
 123         } while (0)
 124
 125 #define D_(lvl, args...)                                \
 126         do {                                            \
 127                 if (lvl & debug)                        \
 128                         D__(KERN_INFO, args);           \
 129         } while (0)
 130
 131 #define D1(args...)     D_(0x01, ##args)
 132 #define D2(args...)     D_(0x02, ##args)
 133 #define D3(args...)     D_(0x04, ##args)
 134 #define D4(args...)     D_(0x08, ##args)
 135 #define D5(args...)     D_(0x10, ##args)
 136
 137 /*****************************************************************************/
 138 /* Enumerators                                                               */
 139 /*****************************************************************************/
 140 enum pkt_parse_state {
 141         WAIT_IP,
 142         WAIT_DATA,
 143         WAIT_SYNC
 144 };
 145
 146 /*****************************************************************************/
 147 /* Structs                                                                   */
 148 /*****************************************************************************/
 149
 150 struct hso_shared_int {
 151         struct usb_endpoint_descriptor *intr_endp;
 152         void *shared_intr_buf;
 153         struct urb *shared_intr_urb;
 154         struct usb_device *usb;
 155         int use_count;
 156         int ref_count;
 157         struct mutex shared_int_lock;
 158 };
 159
 160 struct hso_net {
 161         struct hso_device *parent;
 162         struct net_device *net;
 163         struct rfkill *rfkill;
 164
 165         struct usb_endpoint_descriptor *in_endp;
 166         struct usb_endpoint_descriptor *out_endp;
 167
 168         struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
 169         struct urb *mux_bulk_tx_urb;
 170         void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
 171         void *mux_bulk_tx_buf;
 172
 173         struct sk_buff *skb_rx_buf;
 174         struct sk_buff *skb_tx_buf;
 175
 176         enum pkt_parse_state rx_parse_state;
 177         spinlock_t net_lock;
 178
 179         unsigned short rx_buf_size;
 180         unsigned short rx_buf_missing;
 181         struct iphdr rx_ip_hdr;
 182
 183         unsigned long flags;
 184 };
 185
 186 enum rx_ctrl_state{
 187         RX_IDLE,
 188         RX_SENT,
 189         RX_PENDING
 190 };
 191
 192 #define BM_REQUEST_TYPE (0xa1)
 193 #define B_NOTIFICATION  (0x20)
 194 #define W_VALUE         (0x0)
 195 #define W_INDEX         (0x2)
 196 #define W_LENGTH        (0x2)
 197
 198 #define B_OVERRUN       (0x1<<6)
 199 #define B_PARITY        (0x1<<5)
 200 #define B_FRAMING       (0x1<<4)
 201 #define B_RING_SIGNAL   (0x1<<3)
 202 #define B_BREAK         (0x1<<2)
 203 #define B_TX_CARRIER    (0x1<<1)
 204 #define B_RX_CARRIER    (0x1<<0)
 205
 206 struct hso_serial_state_notification {
 207         u8 bmRequestType;
 208         u8 bNotification;
 209         u16 wValue;
 210         u16 wIndex;
 211         u16 wLength;
 212         u16 UART_state_bitmap;
 213 } __packed;
 214
 215 struct hso_tiocmget {
 216         struct mutex mutex;
 217         wait_queue_head_t waitq;
 218         int    intr_completed;
 219         struct usb_endpoint_descriptor *endp;
 220         struct urb *urb;
 221         struct hso_serial_state_notification serial_state_notification;
 222         u16    prev_UART_state_bitmap;
 223         struct uart_icount icount;
 224 };
 225
 226
 227 struct hso_serial {
 228         struct hso_device *parent;
 229         int magic;
 230         u8 minor;
 231
 232         struct hso_shared_int *shared_int;
 233
 234         /* rx/tx urb could be either a bulk urb or a control urb depending
 235            on which serial port it is used on. */
 236         struct urb *rx_urb[MAX_RX_URBS];
 237         u8 num_rx_urbs;
 238         u8 *rx_data[MAX_RX_URBS];
 239         u16 rx_data_length;     /* should contain allocated length */
 240
 241         struct urb *tx_urb;
 242         u8 *tx_data;
 243         u8 *tx_buffer;
 244         u16 tx_data_length;     /* should contain allocated length */
 245         u16 tx_data_count;
 246         u16 tx_buffer_count;
 247         struct usb_ctrlrequest ctrl_req_tx;
 248         struct usb_ctrlrequest ctrl_req_rx;
 249
 250         struct usb_endpoint_descriptor *in_endp;
 251         struct usb_endpoint_descriptor *out_endp;
 252
 253         enum rx_ctrl_state rx_state;
 254         u8 rts_state;
 255         u8 dtr_state;
 256         unsigned tx_urb_used:1;
 257
 258         /* from usb_serial_port */
 259         struct tty_struct *tty;
 260         int open_count;
 261         spinlock_t serial_lock;
 262
 263         int (*write_data) (struct hso_serial *serial);
 264         struct hso_tiocmget  *tiocmget;
 265         /* Hacks required to get flow control
 266          * working on the serial receive buffers
 267          * so as not to drop characters on the floor.
 268          */
 269         int  curr_rx_urb_idx;
 270         u16  curr_rx_urb_offset;
 271         u8   rx_urb_filled[MAX_RX_URBS];
 272         struct tasklet_struct unthrottle_tasklet;
 273         struct work_struct    retry_unthrottle_workqueue;
 274 };
 275
 276 struct hso_device {
 277         union {
 278                 struct hso_serial *dev_serial;
 279                 struct hso_net *dev_net;
 280         } port_data;
 281
 282         u32 port_spec;
 283
 284         u8 is_active;
 285         u8 usb_gone;
 286         struct work_struct async_get_intf;
 287         struct work_struct async_put_intf;
 288         struct work_struct reset_device;
 289
 290         struct usb_device *usb;
 291         struct usb_interface *interface;
 292
 293         struct device *dev;
 294         struct kref ref;
 295         struct mutex mutex;
 296 };
 297
 298 /* Type of interface */
 299 #define HSO_INTF_MASK           0xFF00
 300 #define HSO_INTF_MUX            0x0100
 301 #define HSO_INTF_BULK           0x0200
 302
 303 /* Type of port */
 304 #define HSO_PORT_MASK           0xFF
 305 #define HSO_PORT_NO_PORT        0x0
 306 #define HSO_PORT_CONTROL        0x1
 307 #define HSO_PORT_APP            0x2
 308 #define HSO_PORT_GPS            0x3
 309 #define HSO_PORT_PCSC           0x4
 310 #define HSO_PORT_APP2           0x5
 311 #define HSO_PORT_GPS_CONTROL    0x6
 312 #define HSO_PORT_MSD            0x7
 313 #define HSO_PORT_VOICE          0x8
 314 #define HSO_PORT_DIAG2          0x9
 315 #define HSO_PORT_DIAG           0x10
 316 #define HSO_PORT_MODEM          0x11
 317 #define HSO_PORT_NETWORK        0x12
 318
 319 /* Additional device info */
 320 #define HSO_INFO_MASK           0xFF000000
 321 #define HSO_INFO_CRC_BUG        0x01000000
 322
 323 /*****************************************************************************/
 324 /* Prototypes                                                                */
 325 /*****************************************************************************/
 326 /* Serial driver functions */
 327 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
 328                                unsigned int set, unsigned int clear);
 329 static void ctrl_callback(struct urb *urb);
 330 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
 331 static void hso_kick_transmit(struct hso_serial *serial);
 332 /* Helper functions */
 333 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
 334                                    struct usb_device *usb, gfp_t gfp);
 335 static void handle_usb_error(int status, const char *function,
 336                              struct hso_device *hso_dev);
 337 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
 338                                                   int type, int dir);
 339 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
 340 static void hso_free_interface(struct usb_interface *intf);
 341 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
 342 static int hso_stop_serial_device(struct hso_device *hso_dev);
 343 static int hso_start_net_device(struct hso_device *hso_dev);
 344 static void hso_free_shared_int(struct hso_shared_int *shared_int);
 345 static int hso_stop_net_device(struct hso_device *hso_dev);
 346 static void hso_serial_ref_free(struct kref *ref);
 347 static void hso_std_serial_read_bulk_callback(struct urb *urb);
 348 static int hso_mux_serial_read(struct hso_serial *serial);
 349 static void async_get_intf(struct work_struct *data);
 350 static void async_put_intf(struct work_struct *data);
 351 static int hso_put_activity(struct hso_device *hso_dev);
 352 static int hso_get_activity(struct hso_device *hso_dev);
 353 static void tiocmget_intr_callback(struct urb *urb);
 354 static void reset_device(struct work_struct *data);
 355 /*****************************************************************************/
 356 /* Helping functions                                                         */
 357 /*****************************************************************************/
 358
 359 /* #define DEBUG */
 360
 361 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
 362 {
 363         return hso_dev->port_data.dev_net;
 364 }
 365
 366 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
 367 {
 368         return hso_dev->port_data.dev_serial;
 369 }
 370
 371 /* Debugging functions */
 372 #ifdef DEBUG
 373 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
 374                      unsigned int len)
 375 {
 376         static char name[255];
 377
 378         sprintf(name, "hso[%d:%s]", line_count, func_name);
 379         print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
 380 }
 381
 382 #define DUMP(buf_, len_)        \
 383         dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
 384
 385 #define DUMP1(buf_, len_)                       \
 386         do {                                    \
 387                 if (0x01 & debug)               \
 388                         DUMP(buf_, len_);       \
 389         } while (0)
 390 #else
 391 #define DUMP(buf_, len_)
 392 #define DUMP1(buf_, len_)
 393 #endif
 394
 395 /* module parameters */
 396 static int debug;
 397 static int tty_major;
 398 static int disable_net;
 399
 400 /* driver info */
 401 static const char driver_name[] = "hso";
 402 static const char tty_filename[] = "ttyHS";
 403 static const char *version = __FILE__ ": " MOD_AUTHOR;
 404 /* the usb driver itself (registered in hso_init) */
 405 static struct usb_driver hso_driver;
 406 /* serial structures */
 407 static struct tty_driver *tty_drv;
 408 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
 409 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
 410 static spinlock_t serial_table_lock;
 411
 412 static const s32 default_port_spec[] = {
 413         HSO_INTF_MUX | HSO_PORT_NETWORK,
 414         HSO_INTF_BULK | HSO_PORT_DIAG,
 415         HSO_INTF_BULK | HSO_PORT_MODEM,
 416         0
 417 };
 418
 419 static const s32 icon321_port_spec[] = {
 420         HSO_INTF_MUX | HSO_PORT_NETWORK,
 421         HSO_INTF_BULK | HSO_PORT_DIAG2,
 422         HSO_INTF_BULK | HSO_PORT_MODEM,
 423         HSO_INTF_BULK | HSO_PORT_DIAG,
 424         0
 425 };
 426
 427 #define default_port_device(vendor, product)    \
 428         USB_DEVICE(vendor, product),    \
 429                 .driver_info = (kernel_ulong_t)default_port_spec
 430
 431 #define icon321_port_device(vendor, product)    \
 432         USB_DEVICE(vendor, product),    \
 433                 .driver_info = (kernel_ulong_t)icon321_port_spec
 434
 435 /* list of devices we support */
 436 static const struct usb_device_id hso_ids[] = {
 437         {default_port_device(0x0af0, 0x6711)},
 438         {default_port_device(0x0af0, 0x6731)},
 439         {default_port_device(0x0af0, 0x6751)},
 440         {default_port_device(0x0af0, 0x6771)},
 441         {default_port_device(0x0af0, 0x6791)},
 442         {default_port_device(0x0af0, 0x6811)},
 443         {default_port_device(0x0af0, 0x6911)},
 444         {default_port_device(0x0af0, 0x6951)},
 445         {default_port_device(0x0af0, 0x6971)},
 446         {default_port_device(0x0af0, 0x7011)},
 447         {default_port_device(0x0af0, 0x7031)},
 448         {default_port_device(0x0af0, 0x7051)},
 449         {default_port_device(0x0af0, 0x7071)},
 450         {default_port_device(0x0af0, 0x7111)},
 451         {default_port_device(0x0af0, 0x7211)},
 452         {default_port_device(0x0af0, 0x7251)},
 453         {default_port_device(0x0af0, 0x7271)},
 454         {default_port_device(0x0af0, 0x7311)},
 455         {default_port_device(0x0af0, 0xc031)},  /* Icon-Edge */
 456         {icon321_port_device(0x0af0, 0xd013)},  /* Module HSxPA */
 457         {icon321_port_device(0x0af0, 0xd031)},  /* Icon-321 */
 458         {icon321_port_device(0x0af0, 0xd033)},  /* Icon-322 */
 459         {USB_DEVICE(0x0af0, 0x7301)},           /* GE40x */
 460         {USB_DEVICE(0x0af0, 0x7361)},           /* GE40x */
 461         {USB_DEVICE(0x0af0, 0x7381)},           /* GE40x */
 462         {USB_DEVICE(0x0af0, 0x7401)},           /* GI 0401 */
 463         {USB_DEVICE(0x0af0, 0x7501)},           /* GTM 382 */
 464         {USB_DEVICE(0x0af0, 0x7601)},           /* GE40x */
 465         {USB_DEVICE(0x0af0, 0x7701)},
 466         {USB_DEVICE(0x0af0, 0x7706)},
 467         {USB_DEVICE(0x0af0, 0x7801)},
 468         {USB_DEVICE(0x0af0, 0x7901)},
 469         {USB_DEVICE(0x0af0, 0x7A01)},
 470         {USB_DEVICE(0x0af0, 0x7A05)},
 471         {USB_DEVICE(0x0af0, 0x8200)},
 472         {USB_DEVICE(0x0af0, 0x8201)},
 473         {USB_DEVICE(0x0af0, 0x8300)},
 474         {USB_DEVICE(0x0af0, 0x8302)},
 475         {USB_DEVICE(0x0af0, 0x8304)},
 476         {USB_DEVICE(0x0af0, 0x8400)},
 477         {USB_DEVICE(0x0af0, 0x8600)},
 478         {USB_DEVICE(0x0af0, 0x8800)},
 479         {USB_DEVICE(0x0af0, 0x8900)},
 480         {USB_DEVICE(0x0af0, 0x9000)},
 481         {USB_DEVICE(0x0af0, 0xd035)},
 482         {USB_DEVICE(0x0af0, 0xd055)},
 483         {USB_DEVICE(0x0af0, 0xd155)},
 484         {USB_DEVICE(0x0af0, 0xd255)},
 485         {USB_DEVICE(0x0af0, 0xd057)},
 486         {USB_DEVICE(0x0af0, 0xd157)},
 487         {USB_DEVICE(0x0af0, 0xd257)},
 488         {USB_DEVICE(0x0af0, 0xd357)},
 489         {USB_DEVICE(0x0af0, 0xd058)},
 490         {USB_DEVICE(0x0af0, 0xc100)},
 491         {}
 492 };
 493 MODULE_DEVICE_TABLE(usb, hso_ids);
 494
 495 /* Sysfs attribute */
 496 static ssize_t hso_sysfs_show_porttype(struct device *dev,
 497                                        struct device_attribute *attr,
 498                                        char *buf)
 499 {
 500         struct hso_device *hso_dev = dev_get_drvdata(dev);
 501         char *port_name;
 502
 503         if (!hso_dev)
 504                 return 0;
 505
 506         switch (hso_dev->port_spec & HSO_PORT_MASK) {
 507         case HSO_PORT_CONTROL:
 508                 port_name = "Control";
 509                 break;
 510         case HSO_PORT_APP:
 511                 port_name = "Application";
 512                 break;
 513         case HSO_PORT_APP2:
 514                 port_name = "Application2";
 515                 break;
 516         case HSO_PORT_GPS:
 517                 port_name = "GPS";
 518                 break;
 519         case HSO_PORT_GPS_CONTROL:
 520                 port_name = "GPS Control";
 521                 break;
 522         case HSO_PORT_PCSC:
 523                 port_name = "PCSC";
 524                 break;
 525         case HSO_PORT_DIAG:
 526                 port_name = "Diagnostic";
 527                 break;
 528         case HSO_PORT_DIAG2:
 529                 port_name = "Diagnostic2";
 530                 break;
 531         case HSO_PORT_MODEM:
 532                 port_name = "Modem";
 533                 break;
 534         case HSO_PORT_NETWORK:
 535                 port_name = "Network";
 536                 break;
 537         default:
 538                 port_name = "Unknown";
 539                 break;
 540         }
 541
 542         return sprintf(buf, "%s\n", port_name);
 543 }
 544 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
 545
 546 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
 547 {
 548         int idx;
 549
 550         for (idx = 0; idx < serial->num_rx_urbs; idx++)
 551                 if (serial->rx_urb[idx] == urb)
 552                         return idx;
 553         dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
 554         return -1;
 555 }
 556
 557 /* converts mux value to a port spec value */
 558 static u32 hso_mux_to_port(int mux)
 559 {
 560         u32 result;
 561
 562         switch (mux) {
 563         case 0x1:
 564                 result = HSO_PORT_CONTROL;
 565                 break;
 566         case 0x2:
 567                 result = HSO_PORT_APP;
 568                 break;
 569         case 0x4:
 570                 result = HSO_PORT_PCSC;
 571                 break;
 572         case 0x8:
 573                 result = HSO_PORT_GPS;
 574                 break;
 575         case 0x10:
 576                 result = HSO_PORT_APP2;
 577                 break;
 578         default:
 579                 result = HSO_PORT_NO_PORT;
 580         }
 581         return result;
 582 }
 583
 584 /* converts port spec value to a mux value */
 585 static u32 hso_port_to_mux(int port)
 586 {
 587         u32 result;
 588
 589         switch (port & HSO_PORT_MASK) {
 590         case HSO_PORT_CONTROL:
 591                 result = 0x0;
 592                 break;
 593         case HSO_PORT_APP:
 594                 result = 0x1;
 595                 break;
 596         case HSO_PORT_PCSC:
 597                 result = 0x2;
 598                 break;
 599         case HSO_PORT_GPS:
 600                 result = 0x3;
 601                 break;
 602         case HSO_PORT_APP2:
 603                 result = 0x4;
 604                 break;
 605         default:
 606                 result = 0x0;
 607         }
 608         return result;
 609 }
 610
 611 static struct hso_serial *get_serial_by_shared_int_and_type(
 612                                         struct hso_shared_int *shared_int,
 613                                         int mux)
 614 {
 615         int i, port;
 616
 617         port = hso_mux_to_port(mux);
 618
 619         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
 620                 if (serial_table[i] &&
 621                     (dev2ser(serial_table[i])->shared_int == shared_int) &&
 622                     ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
 623                         return dev2ser(serial_table[i]);
 624                 }
 625         }
 626
 627         return NULL;
 628 }
 629
 630 static struct hso_serial *get_serial_by_index(unsigned index)
 631 {
 632         struct hso_serial *serial = NULL;
 633         unsigned long flags;
 634
 635         spin_lock_irqsave(&serial_table_lock, flags);
 636         if (serial_table[index])
 637                 serial = dev2ser(serial_table[index]);
 638         spin_unlock_irqrestore(&serial_table_lock, flags);
 639
 640         return serial;
 641 }
 642
 643 static int get_free_serial_index(void)
 644 {
 645         int index;
 646         unsigned long flags;
 647
 648         spin_lock_irqsave(&serial_table_lock, flags);
 649         for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
 650                 if (serial_table[index] == NULL) {
 651                         spin_unlock_irqrestore(&serial_table_lock, flags);
 652                         return index;
 653                 }
 654         }
 655         spin_unlock_irqrestore(&serial_table_lock, flags);
 656
 657         printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
 658         return -1;
 659 }
 660
 661 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
 662 {
 663         unsigned long flags;
 664
 665         spin_lock_irqsave(&serial_table_lock, flags);
 666         if (serial)
 667                 serial_table[index] = serial->parent;
 668         else
 669                 serial_table[index] = NULL;
 670         spin_unlock_irqrestore(&serial_table_lock, flags);
 671 }
 672
 673 static void handle_usb_error(int status, const char *function,
 674                              struct hso_device *hso_dev)
 675 {
 676         char *explanation;
 677
 678         switch (status) {
 679         case -ENODEV:
 680                 explanation = "no device";
 681                 break;
 682         case -ENOENT:
 683                 explanation = "endpoint not enabled";
 684                 break;
 685         case -EPIPE:
 686                 explanation = "endpoint stalled";
 687                 break;
 688         case -ENOSPC:
 689                 explanation = "not enough bandwidth";
 690                 break;
 691         case -ESHUTDOWN:
 692                 explanation = "device disabled";
 693                 break;
 694         case -EHOSTUNREACH:
 695                 explanation = "device suspended";
 696                 break;
 697         case -EINVAL:
 698         case -EAGAIN:
 699         case -EFBIG:
 700         case -EMSGSIZE:
 701                 explanation = "internal error";
 702                 break;
 703         case -EILSEQ:
 704         case -EPROTO:
 705         case -ETIME:
 706         case -ETIMEDOUT:
 707                 explanation = "protocol error";
 708                 if (hso_dev)
 709                         schedule_work(&hso_dev->reset_device);
 710                 break;
 711         default:
 712                 explanation = "unknown status";
 713                 break;
 714         }
 715
 716         /* log a meaningful explanation of an USB status */
 717         D1("%s: received USB status - %s (%d)", function, explanation, status);
 718 }
 719
 720 /* Network interface functions */
 721
 722 /* called when net interface is brought up by ifconfig */
 723 static int hso_net_open(struct net_device *net)
 724 {
 725         struct hso_net *odev = netdev_priv(net);
 726         unsigned long flags = 0;
 727
 728         if (!odev) {
 729                 dev_err(&net->dev, "No net device !\n");
 730                 return -ENODEV;
 731         }
 732
 733         odev->skb_tx_buf = NULL;
 734
 735         /* setup environment */
 736         spin_lock_irqsave(&odev->net_lock, flags);
 737         odev->rx_parse_state = WAIT_IP;
 738         odev->rx_buf_size = 0;
 739         odev->rx_buf_missing = sizeof(struct iphdr);
 740         spin_unlock_irqrestore(&odev->net_lock, flags);
 741
 742         /* We are up and running. */
 743         set_bit(HSO_NET_RUNNING, &odev->flags);
 744         hso_start_net_device(odev->parent);
 745
 746         /* Tell the kernel we are ready to start receiving from it */
 747         netif_start_queue(net);
 748
 749         return 0;
 750 }
 751
 752 /* called when interface is brought down by ifconfig */
 753 static int hso_net_close(struct net_device *net)
 754 {
 755         struct hso_net *odev = netdev_priv(net);
 756
 757         /* we don't need the queue anymore */
 758         netif_stop_queue(net);
 759         /* no longer running */
 760         clear_bit(HSO_NET_RUNNING, &odev->flags);
 761
 762         hso_stop_net_device(odev->parent);
 763
 764         /* done */
 765         return 0;
 766 }
 767
 768 /* USB tells is xmit done, we should start the netqueue again */
 769 static void write_bulk_callback(struct urb *urb)
 770 {
 771         struct hso_net *odev = urb->context;
 772         int status = urb->status;
 773
 774         /* Sanity check */
 775         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
 776                 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
 777                 return;
 778         }
 779
 780         /* Do we still have a valid kernel network device? */
 781         if (!netif_device_present(odev->net)) {
 782                 dev_err(&urb->dev->dev, "%s: net device not present\n",
 783                         __func__);
 784                 return;
 785         }
 786
 787         /* log status, but don't act on it, we don't need to resubmit anything
 788          * anyhow */
 789         if (status)
 790                 handle_usb_error(status, __func__, odev->parent);
 791
 792         hso_put_activity(odev->parent);
 793
 794         /* Tell the network interface we are ready for another frame */
 795         netif_wake_queue(odev->net);
 796 }
 797
 798 /* called by kernel when we need to transmit a packet */
 799 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
 800                                             struct net_device *net)
 801 {
 802         struct hso_net *odev = netdev_priv(net);
 803         int result;
 804
 805         /* Tell the kernel, "No more frames 'til we are done with this one." */
 806         netif_stop_queue(net);
 807         if (hso_get_activity(odev->parent) == -EAGAIN) {
 808                 odev->skb_tx_buf = skb;
 809                 return NETDEV_TX_OK;
 810         }
 811
 812         /* log if asked */
 813         DUMP1(skb->data, skb->len);
 814         /* Copy it from kernel memory to OUR memory */
 815         memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
 816         D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
 817
 818         /* Fill in the URB for shipping it out. */
 819         usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
 820                           odev->parent->usb,
 821                           usb_sndbulkpipe(odev->parent->usb,
 822                                           odev->out_endp->
 823                                           bEndpointAddress & 0x7F),
 824                           odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
 825                           odev);
 826
 827         /* Deal with the Zero Length packet problem, I hope */
 828         odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
 829
 830         /* Send the URB on its merry way. */
 831         result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
 832         if (result) {
 833                 dev_warn(&odev->parent->interface->dev,
 834                         "failed mux_bulk_tx_urb %d\n", result);
 835                 net->stats.tx_errors++;
 836                 netif_start_queue(net);
 837         } else {
 838                 net->stats.tx_packets++;
 839                 net->stats.tx_bytes += skb->len;
 840         }
 841         dev_kfree_skb(skb);
 842         /* we're done */
 843         return NETDEV_TX_OK;
 844 }
 845
 846 static const struct ethtool_ops ops = {
 847         .get_link = ethtool_op_get_link
 848 };
 849
 850 /* called when a packet did not ack after watchdogtimeout */
 851 static void hso_net_tx_timeout(struct net_device *net)
 852 {
 853         struct hso_net *odev = netdev_priv(net);
 854
 855         if (!odev)
 856                 return;
 857
 858         /* Tell syslog we are hosed. */
 859         dev_warn(&net->dev, "Tx timed out.\n");
 860
 861         /* Tear the waiting frame off the list */
 862         if (odev->mux_bulk_tx_urb &&
 863             (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
 864                 usb_unlink_urb(odev->mux_bulk_tx_urb);
 865
 866         /* Update statistics */
 867         net->stats.tx_errors++;
 868 }
 869
 870 /* make a real packet from the received USB buffer */
 871 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
 872                         unsigned int count, unsigned char is_eop)
 873 {
 874         unsigned short temp_bytes;
 875         unsigned short buffer_offset = 0;
 876         unsigned short frame_len;
 877         unsigned char *tmp_rx_buf;
 878
 879         /* log if needed */
 880         D1("Rx %d bytes", count);
 881         DUMP(ip_pkt, min(128, (int)count));
 882
 883         while (count) {
 884                 switch (odev->rx_parse_state) {
 885                 case WAIT_IP:
 886                         /* waiting for IP header. */
 887                         /* wanted bytes - size of ip header */
 888                         temp_bytes =
 889                             (count <
 890                              odev->rx_buf_missing) ? count : odev->
 891                             rx_buf_missing;
 892
 893                         memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
 894                                odev->rx_buf_size, ip_pkt + buffer_offset,
 895                                temp_bytes);
 896
 897                         odev->rx_buf_size += temp_bytes;
 898                         buffer_offset += temp_bytes;
 899                         odev->rx_buf_missing -= temp_bytes;
 900                         count -= temp_bytes;
 901
 902                         if (!odev->rx_buf_missing) {
 903                                 /* header is complete allocate an sk_buffer and
 904                                  * continue to WAIT_DATA */
 905                                 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
 906
 907                                 if ((frame_len > DEFAULT_MRU) ||
 908                                     (frame_len < sizeof(struct iphdr))) {
 909                                         dev_err(&odev->net->dev,
 910                                                 "Invalid frame (%d) length\n",
 911                                                 frame_len);
 912                                         odev->rx_parse_state = WAIT_SYNC;
 913                                         continue;
 914                                 }
 915                                 /* Allocate an sk_buff */
 916                                 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
 917                                                                     frame_len);
 918                                 if (!odev->skb_rx_buf) {
 919                                         /* We got no receive buffer. */
 920                                         D1("could not allocate memory");
 921                                         odev->rx_parse_state = WAIT_SYNC;
 922                                         return;
 923                                 }
 924
 925                                 /* Copy what we got so far. make room for iphdr
 926                                  * after tail. */
 927                                 tmp_rx_buf =
 928                                     skb_put(odev->skb_rx_buf,
 929                                             sizeof(struct iphdr));
 930                                 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
 931                                        sizeof(struct iphdr));
 932
 933                                 /* ETH_HLEN */
 934                                 odev->rx_buf_size = sizeof(struct iphdr);
 935
 936                                 /* Filip actually use .tot_len */
 937                                 odev->rx_buf_missing =
 938                                     frame_len - sizeof(struct iphdr);
 939                                 odev->rx_parse_state = WAIT_DATA;
 940                         }
 941                         break;
 942
 943                 case WAIT_DATA:
 944                         temp_bytes = (count < odev->rx_buf_missing)
 945                                         ? count : odev->rx_buf_missing;
 946
 947                         /* Copy the rest of the bytes that are left in the
 948                          * buffer into the waiting sk_buf. */
 949                         /* Make room for temp_bytes after tail. */
 950                         tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
 951                         memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
 952
 953                         odev->rx_buf_missing -= temp_bytes;
 954                         count -= temp_bytes;
 955                         buffer_offset += temp_bytes;
 956                         odev->rx_buf_size += temp_bytes;
 957                         if (!odev->rx_buf_missing) {
 958                                 /* Packet is complete. Inject into stack. */
 959                                 /* We have IP packet here */
 960                                 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
 961                                 /* don't check it */
 962                                 odev->skb_rx_buf->ip_summed =
 963                                         CHECKSUM_UNNECESSARY;
 964
 965                                 skb_reset_mac_header(odev->skb_rx_buf);
 966
 967                                 /* Ship it off to the kernel */
 968                                 netif_rx(odev->skb_rx_buf);
 969                                 /* No longer our buffer. */
 970                                 odev->skb_rx_buf = NULL;
 971
 972                                 /* update out statistics */
 973                                 odev->net->stats.rx_packets++;
 974
 975                                 odev->net->stats.rx_bytes += odev->rx_buf_size;
 976
 977                                 odev->rx_buf_size = 0;
 978                                 odev->rx_buf_missing = sizeof(struct iphdr);
 979                                 odev->rx_parse_state = WAIT_IP;
 980                         }
 981                         break;
 982
 983                 case WAIT_SYNC:
 984                         D1(" W_S");
 985                         count = 0;
 986                         break;
 987                 default:
 988                         D1(" ");
 989                         count--;
 990                         break;
 991                 }
 992         }
 993
 994         /* Recovery mechanism for WAIT_SYNC state. */
 995         if (is_eop) {
 996                 if (odev->rx_parse_state == WAIT_SYNC) {
 997                         odev->rx_parse_state = WAIT_IP;
 998                         odev->rx_buf_size = 0;
 999                         odev->rx_buf_missing = sizeof(struct iphdr);
1000                 }
1001         }
1002 }
1003
1004 /* Moving data from usb to kernel (in interrupt state) */
1005 static void read_bulk_callback(struct urb *urb)
1006 {
1007         struct hso_net *odev = urb->context;
1008         struct net_device *net;
1009         int result;
1010         int status = urb->status;
1011
1012         /* is al ok?  (Filip: Who's Al ?) */
1013         if (status) {
1014                 handle_usb_error(status, __func__, odev->parent);
1015                 return;
1016         }
1017
1018         /* Sanity check */
1019         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1020                 D1("BULK IN callback but driver is not active!");
1021                 return;
1022         }
1023         usb_mark_last_busy(urb->dev);
1024
1025         net = odev->net;
1026
1027         if (!netif_device_present(net)) {
1028                 /* Somebody killed our network interface... */
1029                 return;
1030         }
1031
1032         if (odev->parent->port_spec & HSO_INFO_CRC_BUG) {
1033                 u32 rest;
1034                 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1035                 rest = urb->actual_length %
1036                         le16_to_cpu(odev->in_endp->wMaxPacketSize);
1037                 if (((rest == 5) || (rest == 6)) &&
1038                     !memcmp(((u8 *) urb->transfer_buffer) +
1039                             urb->actual_length - 4, crc_check, 4)) {
1040                         urb->actual_length -= 4;
1041                 }
1042         }
1043
1044         /* do we even have a packet? */
1045         if (urb->actual_length) {
1046                 /* Handle the IP stream, add header and push it onto network
1047                  * stack if the packet is complete. */
1048                 spin_lock(&odev->net_lock);
1049                 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1050                             (urb->transfer_buffer_length >
1051                              urb->actual_length) ? 1 : 0);
1052                 spin_unlock(&odev->net_lock);
1053         }
1054
1055         /* We are done with this URB, resubmit it. Prep the USB to wait for
1056          * another frame. Reuse same as received. */
1057         usb_fill_bulk_urb(urb,
1058                           odev->parent->usb,
1059                           usb_rcvbulkpipe(odev->parent->usb,
1060                                           odev->in_endp->
1061                                           bEndpointAddress & 0x7F),
1062                           urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1063                           read_bulk_callback, odev);
1064
1065         /* Give this to the USB subsystem so it can tell us when more data
1066          * arrives. */
1067         result = usb_submit_urb(urb, GFP_ATOMIC);
1068         if (result)
1069                 dev_warn(&odev->parent->interface->dev,
1070                          "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1071                          result);
1072 }
1073
1074 /* Serial driver functions */
1075
1076 static void hso_init_termios(struct ktermios *termios)
1077 {
1078         /*
1079          * The default requirements for this device are:
1080          */
1081         termios->c_iflag &=
1082                 ~(IGNBRK        /* disable ignore break */
1083                 | BRKINT        /* disable break causes interrupt */
1084                 | PARMRK        /* disable mark parity errors */
1085                 | ISTRIP        /* disable clear high bit of input characters */
1086                 | INLCR         /* disable translate NL to CR */
1087                 | IGNCR         /* disable ignore CR */
1088                 | ICRNL         /* disable translate CR to NL */
1089                 | IXON);        /* disable enable XON/XOFF flow control */
1090
1091         /* disable postprocess output characters */
1092         termios->c_oflag &= ~OPOST;
1093
1094         termios->c_lflag &=
1095                 ~(ECHO          /* disable echo input characters */
1096                 | ECHONL        /* disable echo new line */
1097                 | ICANON        /* disable erase, kill, werase, and rprnt
1098                                    special characters */
1099                 | ISIG          /* disable interrupt, quit, and suspend special
1100                                    characters */
1101                 | IEXTEN);      /* disable non-POSIX special characters */
1102
1103         termios->c_cflag &=
1104                 ~(CSIZE         /* no size */
1105                 | PARENB        /* disable parity bit */
1106                 | CBAUD         /* clear current baud rate */
1107                 | CBAUDEX);     /* clear current buad rate */
1108
1109         termios->c_cflag |= CS8;        /* character size 8 bits */
1110
1111         /* baud rate 115200 */
1112         tty_termios_encode_baud_rate(termios, 115200, 115200);
1113 }
1114
1115 static void _hso_serial_set_termios(struct tty_struct *tty,
1116                                     struct ktermios *old)
1117 {
1118         struct hso_serial *serial = get_serial_by_tty(tty);
1119         struct ktermios *termios;
1120
1121         if (!serial) {
1122                 printk(KERN_ERR "%s: no tty structures", __func__);
1123                 return;
1124         }
1125
1126         D4("port %d", serial->minor);
1127
1128         /*
1129          *      Fix up unsupported bits
1130          */
1131         termios = tty->termios;
1132         termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1133
1134         termios->c_cflag &=
1135                 ~(CSIZE         /* no size */
1136                 | PARENB        /* disable parity bit */
1137                 | CBAUD         /* clear current baud rate */
1138                 | CBAUDEX);     /* clear current buad rate */
1139
1140         termios->c_cflag |= CS8;        /* character size 8 bits */
1141
1142         /* baud rate 115200 */
1143         tty_encode_baud_rate(tty, 115200, 115200);
1144 }
1145
1146 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1147 {
1148         int result;
1149         /* We are done with this URB, resubmit it. Prep the USB to wait for
1150          * another frame */
1151         usb_fill_bulk_urb(urb, serial->parent->usb,
1152                           usb_rcvbulkpipe(serial->parent->usb,
1153                                           serial->in_endp->
1154                                           bEndpointAddress & 0x7F),
1155                           urb->transfer_buffer, serial->rx_data_length,
1156                           hso_std_serial_read_bulk_callback, serial);
1157         /* Give this to the USB subsystem so it can tell us when more data
1158          * arrives. */
1159         result = usb_submit_urb(urb, GFP_ATOMIC);
1160         if (result) {
1161                 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1162                         __func__, result);
1163         }
1164 }
1165
1166
1167
1168
1169 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1170 {
1171         int count;
1172         struct urb *curr_urb;
1173
1174         while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1175                 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1176                 count = put_rxbuf_data(curr_urb, serial);
1177                 if (count == -1)
1178                         return;
1179                 if (count == 0) {
1180                         serial->curr_rx_urb_idx++;
1181                         if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1182                                 serial->curr_rx_urb_idx = 0;
1183                         hso_resubmit_rx_bulk_urb(serial, curr_urb);
1184                 }
1185         }
1186 }
1187
1188 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1189 {
1190         int count = 0;
1191         struct urb *urb;
1192
1193         urb = serial->rx_urb[0];
1194         if (serial->open_count > 0) {
1195                 count = put_rxbuf_data(urb, serial);
1196                 if (count == -1)
1197                         return;
1198         }
1199         /* Re issue a read as long as we receive data. */
1200
1201         if (count == 0 && ((urb->actual_length != 0) ||
1202                            (serial->rx_state == RX_PENDING))) {
1203                 serial->rx_state = RX_SENT;
1204                 hso_mux_serial_read(serial);
1205         } else
1206                 serial->rx_state = RX_IDLE;
1207 }
1208
1209
1210 /* read callback for Diag and CS port */
1211 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1212 {
1213         struct hso_serial *serial = urb->context;
1214         int status = urb->status;
1215
1216         /* sanity check */
1217         if (!serial) {
1218                 D1("serial == NULL");
1219                 return;
1220         } else if (status) {
1221                 handle_usb_error(status, __func__, serial->parent);
1222                 return;
1223         }
1224
1225         D4("\n--- Got serial_read_bulk callback %02x ---", status);
1226         D1("Actual length = %d\n", urb->actual_length);
1227         DUMP1(urb->transfer_buffer, urb->actual_length);
1228
1229         /* Anyone listening? */
1230         if (serial->open_count == 0)
1231                 return;
1232
1233         if (status == 0) {
1234                 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) {
1235                         u32 rest;
1236                         u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1237                         rest =
1238                             urb->actual_length %
1239                             le16_to_cpu(serial->in_endp->wMaxPacketSize);
1240                         if (((rest == 5) || (rest == 6)) &&
1241                             !memcmp(((u8 *) urb->transfer_buffer) +
1242                                     urb->actual_length - 4, crc_check, 4)) {
1243                                 urb->actual_length -= 4;
1244                         }
1245                 }
1246                 /* Valid data, handle RX data */
1247                 spin_lock(&serial->serial_lock);
1248                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1249                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1250                 spin_unlock(&serial->serial_lock);
1251         } else if (status == -ENOENT || status == -ECONNRESET) {
1252                 /* Unlinked - check for throttled port. */
1253                 D2("Port %d, successfully unlinked urb", serial->minor);
1254                 spin_lock(&serial->serial_lock);
1255                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1256                 hso_resubmit_rx_bulk_urb(serial, urb);
1257                 spin_unlock(&serial->serial_lock);
1258         } else {
1259                 D2("Port %d, status = %d for read urb", serial->minor, status);
1260                 return;
1261         }
1262 }
1263
1264 /*
1265  * This needs to be a tasklet otherwise we will
1266  * end up recursively calling this function.
1267  */
1268 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1269 {
1270         unsigned long flags;
1271
1272         spin_lock_irqsave(&serial->serial_lock, flags);
1273         if ((serial->parent->port_spec & HSO_INTF_MUX))
1274                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1275         else
1276                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1277         spin_unlock_irqrestore(&serial->serial_lock, flags);
1278 }
1279
1280 static  void hso_unthrottle(struct tty_struct *tty)
1281 {
1282         struct hso_serial *serial = get_serial_by_tty(tty);
1283
1284         tasklet_hi_schedule(&serial->unthrottle_tasklet);
1285 }
1286
1287 static void hso_unthrottle_workfunc(struct work_struct *work)
1288 {
1289         struct hso_serial *serial =
1290             container_of(work, struct hso_serial,
1291                          retry_unthrottle_workqueue);
1292         hso_unthrottle_tasklet(serial);
1293 }
1294
1295 /* open the requested serial port */
1296 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1297 {
1298         struct hso_serial *serial = get_serial_by_index(tty->index);
1299         int result;
1300
1301         /* sanity check */
1302         if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1303                 WARN_ON(1);
1304                 tty->driver_data = NULL;
1305                 D1("Failed to open port");
1306                 return -ENODEV;
1307         }
1308
1309         mutex_lock(&serial->parent->mutex);
1310         result = usb_autopm_get_interface(serial->parent->interface);
1311         if (result < 0)
1312                 goto err_out;
1313
1314         D1("Opening %d", serial->minor);
1315         kref_get(&serial->parent->ref);
1316
1317         /* setup */
1318         spin_lock_irq(&serial->serial_lock);
1319         tty->driver_data = serial;
1320         tty_kref_put(serial->tty);
1321         serial->tty = tty_kref_get(tty);
1322         spin_unlock_irq(&serial->serial_lock);
1323
1324         /* check for port already opened, if not set the termios */
1325         serial->open_count++;
1326         if (serial->open_count == 1) {
1327                 serial->rx_state = RX_IDLE;
1328                 /* Force default termio settings */
1329                 _hso_serial_set_termios(tty, NULL);
1330                 tasklet_init(&serial->unthrottle_tasklet,
1331                              (void (*)(unsigned long))hso_unthrottle_tasklet,
1332                              (unsigned long)serial);
1333                 INIT_WORK(&serial->retry_unthrottle_workqueue,
1334                           hso_unthrottle_workfunc);
1335                 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1336                 if (result) {
1337                         hso_stop_serial_device(serial->parent);
1338                         serial->open_count--;
1339                         kref_put(&serial->parent->ref, hso_serial_ref_free);
1340                 }
1341         } else {
1342                 D1("Port was already open");
1343         }
1344
1345         usb_autopm_put_interface(serial->parent->interface);
1346
1347         /* done */
1348         if (result)
1349                 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0);
1350 err_out:
1351         mutex_unlock(&serial->parent->mutex);
1352         return result;
1353 }
1354
1355 /* close the requested serial port */
1356 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1357 {
1358         struct hso_serial *serial = tty->driver_data;
1359         u8 usb_gone;
1360
1361         D1("Closing serial port");
1362
1363         /* Open failed, no close cleanup required */
1364         if (serial == NULL)
1365                 return;
1366
1367         mutex_lock(&serial->parent->mutex);
1368         usb_gone = serial->parent->usb_gone;
1369
1370         if (!usb_gone)
1371                 usb_autopm_get_interface(serial->parent->interface);
1372
1373         /* reset the rts and dtr */
1374         /* do the actual close */
1375         serial->open_count--;
1376
1377         if (serial->open_count <= 0) {
1378                 serial->open_count = 0;
1379                 spin_lock_irq(&serial->serial_lock);
1380                 if (serial->tty == tty) {
1381                         serial->tty->driver_data = NULL;
1382                         serial->tty = NULL;
1383                         tty_kref_put(tty);
1384                 }
1385                 spin_unlock_irq(&serial->serial_lock);
1386                 if (!usb_gone)
1387                         hso_stop_serial_device(serial->parent);
1388                 tasklet_kill(&serial->unthrottle_tasklet);
1389                 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1390         }
1391
1392         if (!usb_gone)
1393                 usb_autopm_put_interface(serial->parent->interface);
1394
1395         mutex_unlock(&serial->parent->mutex);
1396
1397         kref_put(&serial->parent->ref, hso_serial_ref_free);
1398 }
1399
1400 /* close the requested serial port */
1401 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1402                             int count)
1403 {
1404         struct hso_serial *serial = get_serial_by_tty(tty);
1405         int space, tx_bytes;
1406         unsigned long flags;
1407
1408         /* sanity check */
1409         if (serial == NULL) {
1410                 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1411                 return -ENODEV;
1412         }
1413
1414         spin_lock_irqsave(&serial->serial_lock, flags);
1415
1416         space = serial->tx_data_length - serial->tx_buffer_count;
1417         tx_bytes = (count < space) ? count : space;
1418
1419         if (!tx_bytes)
1420                 goto out;
1421
1422         memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1423         serial->tx_buffer_count += tx_bytes;
1424
1425 out:
1426         spin_unlock_irqrestore(&serial->serial_lock, flags);
1427
1428         hso_kick_transmit(serial);
1429         /* done */
1430         return tx_bytes;
1431 }
1432
1433 /* how much room is there for writing */
1434 static int hso_serial_write_room(struct tty_struct *tty)
1435 {
1436         struct hso_serial *serial = get_serial_by_tty(tty);
1437         int room;
1438         unsigned long flags;
1439
1440         spin_lock_irqsave(&serial->serial_lock, flags);
1441         room = serial->tx_data_length - serial->tx_buffer_count;
1442         spin_unlock_irqrestore(&serial->serial_lock, flags);
1443
1444         /* return free room */
1445         return room;
1446 }
1447
1448 /* setup the term */
1449 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1450 {
1451         struct hso_serial *serial = get_serial_by_tty(tty);
1452         unsigned long flags;
1453
1454         if (old)
1455                 D5("Termios called with: cflags new[%d] - old[%d]",
1456                    tty->termios->c_cflag, old->c_cflag);
1457
1458         /* the actual setup */
1459         spin_lock_irqsave(&serial->serial_lock, flags);
1460         if (serial->open_count)
1461                 _hso_serial_set_termios(tty, old);
1462         else
1463                 tty->termios = old;
1464         spin_unlock_irqrestore(&serial->serial_lock, flags);
1465
1466         /* done */
1467 }
1468
1469 /* how many characters in the buffer */
1470 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1471 {
1472         struct hso_serial *serial = get_serial_by_tty(tty);
1473         int chars;
1474         unsigned long flags;
1475
1476         /* sanity check */
1477         if (serial == NULL)
1478                 return 0;
1479
1480         spin_lock_irqsave(&serial->serial_lock, flags);
1481         chars = serial->tx_buffer_count;
1482         spin_unlock_irqrestore(&serial->serial_lock, flags);
1483
1484         return chars;
1485 }
1486 static int tiocmget_submit_urb(struct hso_serial *serial,
1487                                struct hso_tiocmget *tiocmget,
1488                                struct usb_device *usb)
1489 {
1490         int result;
1491
1492         if (serial->parent->usb_gone)
1493                 return -ENODEV;
1494         usb_fill_int_urb(tiocmget->urb, usb,
1495                          usb_rcvintpipe(usb,
1496                                         tiocmget->endp->
1497                                         bEndpointAddress & 0x7F),
1498                          &tiocmget->serial_state_notification,
1499                          sizeof(struct hso_serial_state_notification),
1500                          tiocmget_intr_callback, serial,
1501                          tiocmget->endp->bInterval);
1502         result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1503         if (result) {
1504                 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1505                          result);
1506         }
1507         return result;
1508
1509 }
1510
1511 static void tiocmget_intr_callback(struct urb *urb)
1512 {
1513         struct hso_serial *serial = urb->context;
1514         struct hso_tiocmget *tiocmget;
1515         int status = urb->status;
1516         u16 UART_state_bitmap, prev_UART_state_bitmap;
1517         struct uart_icount *icount;
1518         struct hso_serial_state_notification *serial_state_notification;
1519         struct usb_device *usb;
1520
1521         /* Sanity checks */
1522         if (!serial)
1523                 return;
1524         if (status) {
1525                 handle_usb_error(status, __func__, serial->parent);
1526                 return;
1527         }
1528         tiocmget = serial->tiocmget;
1529         if (!tiocmget)
1530                 return;
1531         usb = serial->parent->usb;
1532         serial_state_notification = &tiocmget->serial_state_notification;
1533         if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1534             serial_state_notification->bNotification != B_NOTIFICATION ||
1535             le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1536             le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1537             le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1538                 dev_warn(&usb->dev,
1539                          "hso received invalid serial state notification\n");
1540                 DUMP(serial_state_notification,
1541                      sizeof(struct hso_serial_state_notification));
1542         } else {
1543
1544                 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1545                                                 UART_state_bitmap);
1546                 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1547                 icount = &tiocmget->icount;
1548                 spin_lock(&serial->serial_lock);
1549                 if ((UART_state_bitmap & B_OVERRUN) !=
1550                    (prev_UART_state_bitmap & B_OVERRUN))
1551                         icount->parity++;
1552                 if ((UART_state_bitmap & B_PARITY) !=
1553                    (prev_UART_state_bitmap & B_PARITY))
1554                         icount->parity++;
1555                 if ((UART_state_bitmap & B_FRAMING) !=
1556                    (prev_UART_state_bitmap & B_FRAMING))
1557                         icount->frame++;
1558                 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1559                    !(prev_UART_state_bitmap & B_RING_SIGNAL))
1560                         icount->rng++;
1561                 if ((UART_state_bitmap & B_BREAK) !=
1562                    (prev_UART_state_bitmap & B_BREAK))
1563                         icount->brk++;
1564                 if ((UART_state_bitmap & B_TX_CARRIER) !=
1565                    (prev_UART_state_bitmap & B_TX_CARRIER))
1566                         icount->dsr++;
1567                 if ((UART_state_bitmap & B_RX_CARRIER) !=
1568                    (prev_UART_state_bitmap & B_RX_CARRIER))
1569                         icount->dcd++;
1570                 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1571                 spin_unlock(&serial->serial_lock);
1572                 tiocmget->intr_completed = 1;
1573                 wake_up_interruptible(&tiocmget->waitq);
1574         }
1575         memset(serial_state_notification, 0,
1576                sizeof(struct hso_serial_state_notification));
1577         tiocmget_submit_urb(serial,
1578                             tiocmget,
1579                             serial->parent->usb);
1580 }
1581
1582 /*
1583  * next few functions largely stolen from drivers/serial/serial_core.c
1584  */
1585 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1586  * - mask passed in arg for lines of interest
1587  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1588  * Caller should use TIOCGICOUNT to see which one it was
1589  */
1590 static int
1591 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1592 {
1593         DECLARE_WAITQUEUE(wait, current);
1594         struct uart_icount cprev, cnow;
1595         struct hso_tiocmget  *tiocmget;
1596         int ret;
1597
1598         tiocmget = serial->tiocmget;
1599         if (!tiocmget)
1600                 return -ENOENT;
1601         /*
1602          * note the counters on entry
1603          */
1604         spin_lock_irq(&serial->serial_lock);
1605         memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1606         spin_unlock_irq(&serial->serial_lock);
1607         add_wait_queue(&tiocmget->waitq, &wait);
1608         for (;;) {
1609                 spin_lock_irq(&serial->serial_lock);
1610                 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1611                 spin_unlock_irq(&serial->serial_lock);
1612                 set_current_state(TASK_INTERRUPTIBLE);
1613                 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1614                     ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1615                     ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd))) {
1616                         ret = 0;
1617                         break;
1618                 }
1619                 schedule();
1620                 /* see if a signal did it */
1621                 if (signal_pending(current)) {
1622                         ret = -ERESTARTSYS;
1623                         break;
1624                 }
1625                 cprev = cnow;
1626         }
1627         current->state = TASK_RUNNING;
1628         remove_wait_queue(&tiocmget->waitq, &wait);
1629
1630         return ret;
1631 }
1632
1633 /*
1634  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1635  * Return: write counters to the user passed counter struct
1636  * NB: both 1->0 and 0->1 transitions are counted except for
1637  *     RI where only 0->1 is counted.
1638  */
1639 static int hso_get_count(struct hso_serial *serial,
1640                           struct serial_icounter_struct __user *icnt)
1641 {
1642         struct serial_icounter_struct icount;
1643         struct uart_icount cnow;
1644         struct hso_tiocmget  *tiocmget = serial->tiocmget;
1645
1646         memset(&icount, 0, sizeof(struct serial_icounter_struct));
1647
1648         if (!tiocmget)
1649                  return -ENOENT;
1650         spin_lock_irq(&serial->serial_lock);
1651         memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1652         spin_unlock_irq(&serial->serial_lock);
1653
1654         icount.cts         = cnow.cts;
1655         icount.dsr         = cnow.dsr;
1656         icount.rng         = cnow.rng;
1657         icount.dcd         = cnow.dcd;
1658         icount.rx          = cnow.rx;
1659         icount.tx          = cnow.tx;
1660         icount.frame       = cnow.frame;
1661         icount.overrun     = cnow.overrun;
1662         icount.parity      = cnow.parity;
1663         icount.brk         = cnow.brk;
1664         icount.buf_overrun = cnow.buf_overrun;
1665
1666         return copy_to_user(icnt, &icount, sizeof(icount)) ? -EFAULT : 0;
1667 }
1668
1669
1670 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
1671 {
1672         int retval;
1673         struct hso_serial *serial = get_serial_by_tty(tty);
1674         struct hso_tiocmget  *tiocmget;
1675         u16 UART_state_bitmap;
1676
1677         /* sanity check */
1678         if (!serial) {
1679                 D1("no tty structures");
1680                 return -EINVAL;
1681         }
1682         spin_lock_irq(&serial->serial_lock);
1683         retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1684             ((serial->dtr_state) ? TIOCM_DTR : 0);
1685         tiocmget = serial->tiocmget;
1686         if (tiocmget) {
1687
1688                 UART_state_bitmap = le16_to_cpu(
1689                         tiocmget->prev_UART_state_bitmap);
1690                 if (UART_state_bitmap & B_RING_SIGNAL)
1691                         retval |=  TIOCM_RNG;
1692                 if (UART_state_bitmap & B_RX_CARRIER)
1693                         retval |=  TIOCM_CD;
1694                 if (UART_state_bitmap & B_TX_CARRIER)
1695                         retval |=  TIOCM_DSR;
1696         }
1697         spin_unlock_irq(&serial->serial_lock);
1698         return retval;
1699 }
1700
1701 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
1702                                unsigned int set, unsigned int clear)
1703 {
1704         int val = 0;
1705         unsigned long flags;
1706         int if_num;
1707         struct hso_serial *serial = get_serial_by_tty(tty);
1708
1709         /* sanity check */
1710         if (!serial) {
1711                 D1("no tty structures");
1712                 return -EINVAL;
1713         }
1714
1715         if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1716                 return -EINVAL;
1717
1718         if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1719
1720         spin_lock_irqsave(&serial->serial_lock, flags);
1721         if (set & TIOCM_RTS)
1722                 serial->rts_state = 1;
1723         if (set & TIOCM_DTR)
1724                 serial->dtr_state = 1;
1725
1726         if (clear & TIOCM_RTS)
1727                 serial->rts_state = 0;
1728         if (clear & TIOCM_DTR)
1729                 serial->dtr_state = 0;
1730
1731         if (serial->dtr_state)
1732                 val |= 0x01;
1733         if (serial->rts_state)
1734                 val |= 0x02;
1735
1736         spin_unlock_irqrestore(&serial->serial_lock, flags);
1737
1738         return usb_control_msg(serial->parent->usb,
1739                                usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1740                                0x21, val, if_num, NULL, 0,
1741                                USB_CTRL_SET_TIMEOUT);
1742 }
1743
1744 static int hso_serial_ioctl(struct tty_struct *tty, struct file *file,
1745                             unsigned int cmd, unsigned long arg)
1746 {
1747         struct hso_serial *serial =  get_serial_by_tty(tty);
1748         void __user *uarg = (void __user *)arg;
1749         int ret = 0;
1750         D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1751
1752         if (!serial)
1753                 return -ENODEV;
1754         switch (cmd) {
1755         case TIOCMIWAIT:
1756                 ret = hso_wait_modem_status(serial, arg);
1757                 break;
1758
1759         case TIOCGICOUNT:
1760                 ret = hso_get_count(serial, uarg);
1761                 break;
1762         default:
1763                 ret = -ENOIOCTLCMD;
1764                 break;
1765         }
1766         return ret;
1767 }
1768
1769
1770 /* starts a transmit */
1771 static void hso_kick_transmit(struct hso_serial *serial)
1772 {
1773         u8 *temp;
1774         unsigned long flags;
1775         int res;
1776
1777         spin_lock_irqsave(&serial->serial_lock, flags);
1778         if (!serial->tx_buffer_count)
1779                 goto out;
1780
1781         if (serial->tx_urb_used)
1782                 goto out;
1783
1784         /* Wakeup USB interface if necessary */
1785         if (hso_get_activity(serial->parent) == -EAGAIN)
1786                 goto out;
1787
1788         /* Switch pointers around to avoid memcpy */
1789         temp = serial->tx_buffer;
1790         serial->tx_buffer = serial->tx_data;
1791         serial->tx_data = temp;
1792         serial->tx_data_count = serial->tx_buffer_count;
1793         serial->tx_buffer_count = 0;
1794
1795         /* If temp is set, it means we switched buffers */
1796         if (temp && serial->write_data) {
1797                 res = serial->write_data(serial);
1798                 if (res >= 0)
1799                         serial->tx_urb_used = 1;
1800         }
1801 out:
1802         spin_unlock_irqrestore(&serial->serial_lock, flags);
1803 }
1804
1805 /* make a request (for reading and writing data to muxed serial port) */
1806 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1807                               struct urb *ctrl_urb,
1808                               struct usb_ctrlrequest *ctrl_req,
1809                               u8 *ctrl_urb_data, u32 size)
1810 {
1811         int result;
1812         int pipe;
1813
1814         /* Sanity check */
1815         if (!serial || !ctrl_urb || !ctrl_req) {
1816                 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1817                 return -EINVAL;
1818         }
1819
1820         /* initialize */
1821         ctrl_req->wValue = 0;
1822         ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1823         ctrl_req->wLength = cpu_to_le16(size);
1824
1825         if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1826                 /* Reading command */
1827                 ctrl_req->bRequestType = USB_DIR_IN |
1828                                          USB_TYPE_OPTION_VENDOR |
1829                                          USB_RECIP_INTERFACE;
1830                 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1831                 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1832         } else {
1833                 /* Writing command */
1834                 ctrl_req->bRequestType = USB_DIR_OUT |
1835                                          USB_TYPE_OPTION_VENDOR |
1836                                          USB_RECIP_INTERFACE;
1837                 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1838                 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1839         }
1840         /* syslog */
1841         D2("%s command (%02x) len: %d, port: %d",
1842            type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1843            ctrl_req->bRequestType, ctrl_req->wLength, port);
1844
1845         /* Load ctrl urb */
1846         ctrl_urb->transfer_flags = 0;
1847         usb_fill_control_urb(ctrl_urb,
1848                              serial->parent->usb,
1849                              pipe,
1850                              (u8 *) ctrl_req,
1851                              ctrl_urb_data, size, ctrl_callback, serial);
1852         /* Send it on merry way */
1853         result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1854         if (result) {
1855                 dev_err(&ctrl_urb->dev->dev,
1856                         "%s failed submit ctrl_urb %d type %d\n", __func__,
1857                         result, type);
1858                 return result;
1859         }
1860
1861         /* done */
1862         return size;
1863 }
1864
1865 /* called by intr_callback when read occurs */
1866 static int hso_mux_serial_read(struct hso_serial *serial)
1867 {
1868         if (!serial)
1869                 return -EINVAL;
1870
1871         /* clean data */
1872         memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1873         /* make the request */
1874
1875         if (serial->num_rx_urbs != 1) {
1876                 dev_err(&serial->parent->interface->dev,
1877                         "ERROR: mux'd reads with multiple buffers "
1878                         "not possible\n");
1879                 return 0;
1880         }
1881         return mux_device_request(serial,
1882                                   USB_CDC_GET_ENCAPSULATED_RESPONSE,
1883                                   serial->parent->port_spec & HSO_PORT_MASK,
1884                                   serial->rx_urb[0],
1885                                   &serial->ctrl_req_rx,
1886                                   serial->rx_data[0], serial->rx_data_length);
1887 }
1888
1889 /* used for muxed serial port callback (muxed serial read) */
1890 static void intr_callback(struct urb *urb)
1891 {
1892         struct hso_shared_int *shared_int = urb->context;
1893         struct hso_serial *serial;
1894         unsigned char *port_req;
1895         int status = urb->status;
1896         int i;
1897
1898         usb_mark_last_busy(urb->dev);
1899
1900         /* sanity check */
1901         if (!shared_int)
1902                 return;
1903
1904         /* status check */
1905         if (status) {
1906                 handle_usb_error(status, __func__, NULL);
1907                 return;
1908         }
1909         D4("\n--- Got intr callback 0x%02X ---", status);
1910
1911         /* what request? */
1912         port_req = urb->transfer_buffer;
1913         D4(" port_req = 0x%.2X\n", *port_req);
1914         /* loop over all muxed ports to find the one sending this */
1915         for (i = 0; i < 8; i++) {
1916                 /* max 8 channels on MUX */
1917                 if (*port_req & (1 << i)) {
1918                         serial = get_serial_by_shared_int_and_type(shared_int,
1919                                                                    (1 << i));
1920                         if (serial != NULL) {
1921                                 D1("Pending read interrupt on port %d\n", i);
1922                                 spin_lock(&serial->serial_lock);
1923                                 if (serial->rx_state == RX_IDLE &&
1924                                         serial->open_count > 0) {
1925                                         /* Setup and send a ctrl req read on
1926                                          * port i */
1927                                         if (!serial->rx_urb_filled[0]) {
1928                                                 serial->rx_state = RX_SENT;
1929                                                 hso_mux_serial_read(serial);
1930                                         } else
1931                                                 serial->rx_state = RX_PENDING;
1932                                 } else {
1933                                         D1("Already a read pending on "
1934                                            "port %d or port not open\n", i);
1935                                 }
1936                                 spin_unlock(&serial->serial_lock);
1937                         }
1938                 }
1939         }
1940         /* Resubmit interrupt urb */
1941         hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1942 }
1943
1944 /* called for writing to muxed serial port */
1945 static int hso_mux_serial_write_data(struct hso_serial *serial)
1946 {
1947         if (NULL == serial)
1948                 return -EINVAL;
1949
1950         return mux_device_request(serial,
1951                                   USB_CDC_SEND_ENCAPSULATED_COMMAND,
1952                                   serial->parent->port_spec & HSO_PORT_MASK,
1953                                   serial->tx_urb,
1954                                   &serial->ctrl_req_tx,
1955                                   serial->tx_data, serial->tx_data_count);
1956 }
1957
1958 /* write callback for Diag and CS port */
1959 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1960 {
1961         struct hso_serial *serial = urb->context;
1962         int status = urb->status;
1963         struct tty_struct *tty;
1964
1965         /* sanity check */
1966         if (!serial) {
1967                 D1("serial == NULL");
1968                 return;
1969         }
1970
1971         spin_lock(&serial->serial_lock);
1972         serial->tx_urb_used = 0;
1973         tty = tty_kref_get(serial->tty);
1974         spin_unlock(&serial->serial_lock);
1975         if (status) {
1976                 handle_usb_error(status, __func__, serial->parent);
1977                 tty_kref_put(tty);
1978                 return;
1979         }
1980         hso_put_activity(serial->parent);
1981         if (tty) {
1982                 tty_wakeup(tty);
1983                 tty_kref_put(tty);
1984         }
1985         hso_kick_transmit(serial);
1986
1987         D1(" ");
1988 }
1989
1990 /* called for writing diag or CS serial port */
1991 static int hso_std_serial_write_data(struct hso_serial *serial)
1992 {
1993         int count = serial->tx_data_count;
1994         int result;
1995
1996         usb_fill_bulk_urb(serial->tx_urb,
1997                           serial->parent->usb,
1998                           usb_sndbulkpipe(serial->parent->usb,
1999                                           serial->out_endp->
2000                                           bEndpointAddress & 0x7F),
2001                           serial->tx_data, serial->tx_data_count,
2002                           hso_std_serial_write_bulk_callback, serial);
2003
2004         result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
2005         if (result) {
2006                 dev_warn(&serial->parent->usb->dev,
2007                          "Failed to submit urb - res %d\n", result);
2008                 return result;
2009         }
2010
2011         return count;
2012 }
2013
2014 /* callback after read or write on muxed serial port */
2015 static void ctrl_callback(struct urb *urb)
2016 {
2017         struct hso_serial *serial = urb->context;
2018         struct usb_ctrlrequest *req;
2019         int status = urb->status;
2020         struct tty_struct *tty;
2021
2022         /* sanity check */
2023         if (!serial)
2024                 return;
2025
2026         spin_lock(&serial->serial_lock);
2027         serial->tx_urb_used = 0;
2028         tty = tty_kref_get(serial->tty);
2029         spin_unlock(&serial->serial_lock);
2030         if (status) {
2031                 handle_usb_error(status, __func__, serial->parent);
2032                 tty_kref_put(tty);
2033                 return;
2034         }
2035
2036         /* what request? */
2037         req = (struct usb_ctrlrequest *)(urb->setup_packet);
2038         D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2039         D4("Actual length of urb = %d\n", urb->actual_length);
2040         DUMP1(urb->transfer_buffer, urb->actual_length);
2041
2042         if (req->bRequestType ==
2043             (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2044                 /* response to a read command */
2045                 serial->rx_urb_filled[0] = 1;
2046                 spin_lock(&serial->serial_lock);
2047                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2048                 spin_unlock(&serial->serial_lock);
2049         } else {
2050                 hso_put_activity(serial->parent);
2051                 if (tty)
2052                         tty_wakeup(tty);
2053                 /* response to a write command */
2054                 hso_kick_transmit(serial);
2055         }
2056         tty_kref_put(tty);
2057 }
2058
2059 /* handle RX data for serial port */
2060 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2061 {
2062         struct tty_struct *tty;
2063         int write_length_remaining = 0;
2064         int curr_write_len;
2065
2066         /* Sanity check */
2067         if (urb == NULL || serial == NULL) {
2068                 D1("serial = NULL");
2069                 return -2;
2070         }
2071
2072         /* All callers to put_rxbuf_data hold serial_lock */
2073         tty = tty_kref_get(serial->tty);
2074
2075         /* Push data to tty */
2076         if (tty) {
2077                 write_length_remaining = urb->actual_length -
2078                         serial->curr_rx_urb_offset;
2079                 D1("data to push to tty");
2080                 while (write_length_remaining) {
2081                         if (test_bit(TTY_THROTTLED, &tty->flags)) {
2082                                 tty_kref_put(tty);
2083                                 return -1;
2084                         }
2085                         curr_write_len =  tty_insert_flip_string
2086                                 (tty, urb->transfer_buffer +
2087                                  serial->curr_rx_urb_offset,
2088                                  write_length_remaining);
2089                         serial->curr_rx_urb_offset += curr_write_len;
2090                         write_length_remaining -= curr_write_len;
2091                         tty_flip_buffer_push(tty);
2092                 }
2093         }
2094         if (write_length_remaining == 0) {
2095                 serial->curr_rx_urb_offset = 0;
2096                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2097         }
2098         tty_kref_put(tty);
2099         return write_length_remaining;
2100 }
2101
2102
2103 /* Base driver functions */
2104
2105 static void hso_log_port(struct hso_device *hso_dev)
2106 {
2107         char *port_type;
2108         char port_dev[20];
2109
2110         switch (hso_dev->port_spec & HSO_PORT_MASK) {
2111         case HSO_PORT_CONTROL:
2112                 port_type = "Control";
2113                 break;
2114         case HSO_PORT_APP:
2115                 port_type = "Application";
2116                 break;
2117         case HSO_PORT_GPS:
2118                 port_type = "GPS";
2119                 break;
2120         case HSO_PORT_GPS_CONTROL:
2121                 port_type = "GPS control";
2122                 break;
2123         case HSO_PORT_APP2:
2124                 port_type = "Application2";
2125                 break;
2126         case HSO_PORT_PCSC:
2127                 port_type = "PCSC";
2128                 break;
2129         case HSO_PORT_DIAG:
2130                 port_type = "Diagnostic";
2131                 break;
2132         case HSO_PORT_DIAG2:
2133                 port_type = "Diagnostic2";
2134                 break;
2135         case HSO_PORT_MODEM:
2136                 port_type = "Modem";
2137                 break;
2138         case HSO_PORT_NETWORK:
2139                 port_type = "Network";
2140                 break;
2141         default:
2142                 port_type = "Unknown";
2143                 break;
2144         }
2145         if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2146                 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2147         } else
2148                 sprintf(port_dev, "/dev/%s%d", tty_filename,
2149                         dev2ser(hso_dev)->minor);
2150
2151         dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2152                 port_type, port_dev);
2153 }
2154
2155 static int hso_start_net_device(struct hso_device *hso_dev)
2156 {
2157         int i, result = 0;
2158         struct hso_net *hso_net = dev2net(hso_dev);
2159
2160         if (!hso_net)
2161                 return -ENODEV;
2162
2163         /* send URBs for all read buffers */
2164         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2165
2166                 /* Prep a receive URB */
2167                 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2168                                   hso_dev->usb,
2169                                   usb_rcvbulkpipe(hso_dev->usb,
2170                                                   hso_net->in_endp->
2171                                                   bEndpointAddress & 0x7F),
2172                                   hso_net->mux_bulk_rx_buf_pool[i],
2173                                   MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2174                                   hso_net);
2175
2176                 /* Put it out there so the device can send us stuff */
2177                 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2178                                         GFP_NOIO);
2179                 if (result)
2180                         dev_warn(&hso_dev->usb->dev,
2181                                 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2182                                 i, result);
2183         }
2184
2185         return result;
2186 }
2187
2188 static int hso_stop_net_device(struct hso_device *hso_dev)
2189 {
2190         int i;
2191         struct hso_net *hso_net = dev2net(hso_dev);
2192
2193         if (!hso_net)
2194                 return -ENODEV;
2195
2196         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2197                 if (hso_net->mux_bulk_rx_urb_pool[i])
2198                         usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2199
2200         }
2201         if (hso_net->mux_bulk_tx_urb)
2202                 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2203
2204         return 0;
2205 }
2206
2207 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2208 {
2209         int i, result = 0;
2210         struct hso_serial *serial = dev2ser(hso_dev);
2211
2212         if (!serial)
2213                 return -ENODEV;
2214
2215         /* If it is not the MUX port fill in and submit a bulk urb (already
2216          * allocated in hso_serial_start) */
2217         if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2218                 for (i = 0; i < serial->num_rx_urbs; i++) {
2219                         usb_fill_bulk_urb(serial->rx_urb[i],
2220                                           serial->parent->usb,
2221                                           usb_rcvbulkpipe(serial->parent->usb,
2222                                                           serial->in_endp->
2223                                                           bEndpointAddress &
2224                                                           0x7F),
2225                                           serial->rx_data[i],
2226                                           serial->rx_data_length,
2227                                           hso_std_serial_read_bulk_callback,
2228                                           serial);
2229                         result = usb_submit_urb(serial->rx_urb[i], flags);
2230                         if (result) {
2231                                 dev_warn(&serial->parent->usb->dev,
2232                                          "Failed to submit urb - res %d\n",
2233                                          result);
2234                                 break;
2235                         }
2236                 }
2237         } else {
2238                 mutex_lock(&serial->shared_int->shared_int_lock);
2239                 if (!serial->shared_int->use_count) {
2240                         result =
2241                             hso_mux_submit_intr_urb(serial->shared_int,
2242                                                     hso_dev->usb, flags);
2243                 }
2244                 serial->shared_int->use_count++;
2245                 mutex_unlock(&serial->shared_int->shared_int_lock);
2246         }
2247         if (serial->tiocmget)
2248                 tiocmget_submit_urb(serial,
2249                                     serial->tiocmget,
2250                                     serial->parent->usb);
2251         return result;
2252 }
2253
2254 static int hso_stop_serial_device(struct hso_device *hso_dev)
2255 {
2256         int i;
2257         struct hso_serial *serial = dev2ser(hso_dev);
2258         struct hso_tiocmget  *tiocmget;
2259
2260         if (!serial)
2261                 return -ENODEV;
2262
2263         for (i = 0; i < serial->num_rx_urbs; i++) {
2264                 if (serial->rx_urb[i]) {
2265                                 usb_kill_urb(serial->rx_urb[i]);
2266                                 serial->rx_urb_filled[i] = 0;
2267                 }
2268         }
2269         serial->curr_rx_urb_idx = 0;
2270         serial->curr_rx_urb_offset = 0;
2271
2272         if (serial->tx_urb)
2273                 usb_kill_urb(serial->tx_urb);
2274
2275         if (serial->shared_int) {
2276                 mutex_lock(&serial->shared_int->shared_int_lock);
2277                 if (serial->shared_int->use_count &&
2278                     (--serial->shared_int->use_count == 0)) {
2279                         struct urb *urb;
2280
2281                         urb = serial->shared_int->shared_intr_urb;
2282                         if (urb)
2283                                 usb_kill_urb(urb);
2284                 }
2285                 mutex_unlock(&serial->shared_int->shared_int_lock);
2286         }
2287         tiocmget = serial->tiocmget;
2288         if (tiocmget) {
2289                 wake_up_interruptible(&tiocmget->waitq);
2290                 usb_kill_urb(tiocmget->urb);
2291         }
2292
2293         return 0;
2294 }
2295
2296 static void hso_serial_common_free(struct hso_serial *serial)
2297 {
2298         int i;
2299
2300         if (serial->parent->dev)
2301                 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2302
2303         tty_unregister_device(tty_drv, serial->minor);
2304
2305         for (i = 0; i < serial->num_rx_urbs; i++) {
2306                 /* unlink and free RX URB */
2307                 usb_free_urb(serial->rx_urb[i]);
2308                 /* free the RX buffer */
2309                 kfree(serial->rx_data[i]);
2310         }
2311
2312         /* unlink and free TX URB */
2313         usb_free_urb(serial->tx_urb);
2314         kfree(serial->tx_data);
2315 }
2316
2317 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2318                                     int rx_size, int tx_size)
2319 {
2320         struct device *dev;
2321         int minor;
2322         int i;
2323
2324         minor = get_free_serial_index();
2325         if (minor < 0)
2326                 goto exit;
2327
2328         /* register our minor number */
2329         serial->parent->dev = tty_register_device(tty_drv, minor,
2330                                         &serial->parent->interface->dev);
2331         dev = serial->parent->dev;
2332         dev_set_drvdata(dev, serial->parent);
2333         i = device_create_file(dev, &dev_attr_hsotype);
2334
2335         /* fill in specific data for later use */
2336         serial->minor = minor;
2337         serial->magic = HSO_SERIAL_MAGIC;
2338         spin_lock_init(&serial->serial_lock);
2339         serial->num_rx_urbs = num_urbs;
2340
2341         /* RX, allocate urb and initialize */
2342
2343         /* prepare our RX buffer */
2344         serial->rx_data_length = rx_size;
2345         for (i = 0; i < serial->num_rx_urbs; i++) {
2346                 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2347                 if (!serial->rx_urb[i]) {
2348                         dev_err(dev, "Could not allocate urb?\n");
2349                         goto exit;
2350                 }
2351                 serial->rx_urb[i]->transfer_buffer = NULL;
2352                 serial->rx_urb[i]->transfer_buffer_length = 0;
2353                 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2354                                              GFP_KERNEL);
2355                 if (!serial->rx_data[i]) {
2356                         dev_err(dev, "%s - Out of memory\n", __func__);
2357                         goto exit;
2358                 }
2359         }
2360
2361         /* TX, allocate urb and initialize */
2362         serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2363         if (!serial->tx_urb) {
2364                 dev_err(dev, "Could not allocate urb?\n");
2365                 goto exit;
2366         }
2367         serial->tx_urb->transfer_buffer = NULL;
2368         serial->tx_urb->transfer_buffer_length = 0;
2369         /* prepare our TX buffer */
2370         serial->tx_data_count = 0;
2371         serial->tx_buffer_count = 0;
2372         serial->tx_data_length = tx_size;
2373         serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2374         if (!serial->tx_data) {
2375                 dev_err(dev, "%s - Out of memory\n", __func__);
2376                 goto exit;
2377         }
2378         serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2379         if (!serial->tx_buffer) {
2380                 dev_err(dev, "%s - Out of memory\n", __func__);
2381                 goto exit;
2382         }
2383
2384         return 0;
2385 exit:
2386         hso_serial_common_free(serial);
2387         return -1;
2388 }
2389
2390 /* Creates a general hso device */
2391 static struct hso_device *hso_create_device(struct usb_interface *intf,
2392                                             int port_spec)
2393 {
2394         struct hso_device *hso_dev;
2395
2396         hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2397         if (!hso_dev)
2398                 return NULL;
2399
2400         hso_dev->port_spec = port_spec;
2401         hso_dev->usb = interface_to_usbdev(intf);
2402         hso_dev->interface = intf;
2403         kref_init(&hso_dev->ref);
2404         mutex_init(&hso_dev->mutex);
2405
2406         INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2407         INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2408         INIT_WORK(&hso_dev->reset_device, reset_device);
2409
2410         return hso_dev;
2411 }
2412
2413 /* Removes a network device in the network device table */
2414 static int remove_net_device(struct hso_device *hso_dev)
2415 {
2416         int i;
2417
2418         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2419                 if (network_table[i] == hso_dev) {
2420                         network_table[i] = NULL;
2421                         break;
2422                 }
2423         }
2424         if (i == HSO_MAX_NET_DEVICES)
2425                 return -1;
2426         return 0;
2427 }
2428
2429 /* Frees our network device */
2430 static void hso_free_net_device(struct hso_device *hso_dev)
2431 {
2432         int i;
2433         struct hso_net *hso_net = dev2net(hso_dev);
2434
2435         if (!hso_net)
2436                 return;
2437
2438         remove_net_device(hso_net->parent);
2439
2440         if (hso_net->net) {
2441                 unregister_netdev(hso_net->net);
2442                 free_netdev(hso_net->net);
2443         }
2444
2445         /* start freeing */
2446         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2447                 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2448                 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2449                 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2450         }
2451         usb_free_urb(hso_net->mux_bulk_tx_urb);
2452         kfree(hso_net->mux_bulk_tx_buf);
2453         hso_net->mux_bulk_tx_buf = NULL;
2454
2455         kfree(hso_dev);
2456 }
2457
2458 static const struct net_device_ops hso_netdev_ops = {
2459         .ndo_open       = hso_net_open,
2460         .ndo_stop       = hso_net_close,
2461         .ndo_start_xmit = hso_net_start_xmit,
2462         .ndo_tx_timeout = hso_net_tx_timeout,
2463 };
2464
2465 /* initialize the network interface */
2466 static void hso_net_init(struct net_device *net)
2467 {
2468         struct hso_net *hso_net = netdev_priv(net);
2469
2470         D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2471
2472         /* fill in the other fields */
2473         net->netdev_ops = &hso_netdev_ops;
2474         net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2475         net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2476         net->type = ARPHRD_NONE;
2477         net->mtu = DEFAULT_MTU - 14;
2478         net->tx_queue_len = 10;
2479         SET_ETHTOOL_OPS(net, &ops);
2480
2481         /* and initialize the semaphore */
2482         spin_lock_init(&hso_net->net_lock);
2483 }
2484
2485 /* Adds a network device in the network device table */
2486 static int add_net_device(struct hso_device *hso_dev)
2487 {
2488         int i;
2489
2490         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2491                 if (network_table[i] == NULL) {
2492                         network_table[i] = hso_dev;
2493                         break;
2494                 }
2495         }
2496         if (i == HSO_MAX_NET_DEVICES)
2497                 return -1;
2498         return 0;
2499 }
2500
2501 static int hso_rfkill_set_block(void *data, bool blocked)
2502 {
2503         struct hso_device *hso_dev = data;
2504         int enabled = !blocked;
2505         int rv;
2506
2507         mutex_lock(&hso_dev->mutex);
2508         if (hso_dev->usb_gone)
2509                 rv = 0;
2510         else
2511                 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2512                                        enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2513                                        USB_CTRL_SET_TIMEOUT);
2514         mutex_unlock(&hso_dev->mutex);
2515         return rv;
2516 }
2517
2518 static const struct rfkill_ops hso_rfkill_ops = {
2519         .set_block = hso_rfkill_set_block,
2520 };
2521
2522 /* Creates and sets up everything for rfkill */
2523 static void hso_create_rfkill(struct hso_device *hso_dev,
2524                              struct usb_interface *interface)
2525 {
2526         struct hso_net *hso_net = dev2net(hso_dev);
2527         struct device *dev = &hso_net->net->dev;
2528         char *rfkn;
2529
2530         rfkn = kzalloc(20, GFP_KERNEL);
2531         if (!rfkn)
2532                 dev_err(dev, "%s - Out of memory\n", __func__);
2533
2534         snprintf(rfkn, 20, "hso-%d",
2535                  interface->altsetting->desc.bInterfaceNumber);
2536
2537         hso_net->rfkill = rfkill_alloc(rfkn,
2538                                        &interface_to_usbdev(interface)->dev,
2539                                        RFKILL_TYPE_WWAN,
2540                                        &hso_rfkill_ops, hso_dev);
2541         if (!hso_net->rfkill) {
2542                 dev_err(dev, "%s - Out of memory\n", __func__);
2543                 kfree(rfkn);
2544                 return;
2545         }
2546         if (rfkill_register(hso_net->rfkill) < 0) {
2547                 rfkill_destroy(hso_net->rfkill);
2548                 kfree(rfkn);
2549                 hso_net->rfkill = NULL;
2550                 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2551                 return;
2552         }
2553 }
2554
2555 static struct device_type hso_type = {
2556         .name   = "wwan",
2557 };
2558
2559 /* Creates our network device */
2560 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2561                                                 int port_spec)
2562 {
2563         int result, i;
2564         struct net_device *net;
2565         struct hso_net *hso_net;
2566         struct hso_device *hso_dev;
2567
2568         hso_dev = hso_create_device(interface, port_spec);
2569         if (!hso_dev)
2570                 return NULL;
2571
2572         /* allocate our network device, then we can put in our private data */
2573         /* call hso_net_init to do the basic initialization */
2574         net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2575         if (!net) {
2576                 dev_err(&interface->dev, "Unable to create ethernet device\n");
2577                 goto exit;
2578         }
2579
2580         hso_net = netdev_priv(net);
2581
2582         hso_dev->port_data.dev_net = hso_net;
2583         hso_net->net = net;
2584         hso_net->parent = hso_dev;
2585
2586         hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2587                                       USB_DIR_IN);
2588         if (!hso_net->in_endp) {
2589                 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2590                 goto exit;
2591         }
2592         hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2593                                        USB_DIR_OUT);
2594         if (!hso_net->out_endp) {
2595                 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2596                 goto exit;
2597         }
2598         SET_NETDEV_DEV(net, &interface->dev);
2599         SET_NETDEV_DEVTYPE(net, &hso_type);
2600
2601         /* registering our net device */
2602         result = register_netdev(net);
2603         if (result) {
2604                 dev_err(&interface->dev, "Failed to register device\n");
2605                 goto exit;
2606         }
2607
2608         /* start allocating */
2609         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2610                 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2611                 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2612                         dev_err(&interface->dev, "Could not allocate rx urb\n");
2613                         goto exit;
2614                 }
2615                 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2616                                                            GFP_KERNEL);
2617                 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2618                         dev_err(&interface->dev, "Could not allocate rx buf\n");
2619                         goto exit;
2620                 }
2621         }
2622         hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2623         if (!hso_net->mux_bulk_tx_urb) {
2624                 dev_err(&interface->dev, "Could not allocate tx urb\n");
2625                 goto exit;
2626         }
2627         hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2628         if (!hso_net->mux_bulk_tx_buf) {
2629                 dev_err(&interface->dev, "Could not allocate tx buf\n");
2630                 goto exit;
2631         }
2632
2633         add_net_device(hso_dev);
2634
2635         hso_log_port(hso_dev);
2636
2637         hso_create_rfkill(hso_dev, interface);
2638
2639         return hso_dev;
2640 exit:
2641         hso_free_net_device(hso_dev);
2642         return NULL;
2643 }
2644
2645 static void hso_free_tiomget(struct hso_serial *serial)
2646 {
2647         struct hso_tiocmget *tiocmget = serial->tiocmget;
2648         if (tiocmget) {
2649                 if (tiocmget->urb) {
2650                         usb_free_urb(tiocmget->urb);
2651                         tiocmget->urb = NULL;
2652                 }
2653                 serial->tiocmget = NULL;
2654                 kfree(tiocmget);
2655
2656         }
2657 }
2658
2659 /* Frees an AT channel ( goes for both mux and non-mux ) */
2660 static void hso_free_serial_device(struct hso_device *hso_dev)
2661 {
2662         struct hso_serial *serial = dev2ser(hso_dev);
2663
2664         if (!serial)
2665                 return;
2666         set_serial_by_index(serial->minor, NULL);
2667
2668         hso_serial_common_free(serial);
2669
2670         if (serial->shared_int) {
2671                 mutex_lock(&serial->shared_int->shared_int_lock);
2672                 if (--serial->shared_int->ref_count == 0)
2673                         hso_free_shared_int(serial->shared_int);
2674                 else
2675                         mutex_unlock(&serial->shared_int->shared_int_lock);
2676         }
2677         hso_free_tiomget(serial);
2678         kfree(serial);
2679         kfree(hso_dev);
2680 }
2681
2682 /* Creates a bulk AT channel */
2683 static struct hso_device *hso_create_bulk_serial_device(
2684                         struct usb_interface *interface, int port)
2685 {
2686         struct hso_device *hso_dev;
2687         struct hso_serial *serial;
2688         int num_urbs;
2689         struct hso_tiocmget *tiocmget;
2690
2691         hso_dev = hso_create_device(interface, port);
2692         if (!hso_dev)
2693                 return NULL;
2694
2695         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2696         if (!serial)
2697                 goto exit;
2698
2699         serial->parent = hso_dev;
2700         hso_dev->port_data.dev_serial = serial;
2701
2702         if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2703                 num_urbs = 2;
2704                 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2705                                            GFP_KERNEL);
2706                 /* it isn't going to break our heart if serial->tiocmget
2707                  *  allocation fails don't bother checking this.
2708                  */
2709                 if (serial->tiocmget) {
2710                         tiocmget = serial->tiocmget;
2711                         tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2712                         if (tiocmget->urb) {
2713                                 mutex_init(&tiocmget->mutex);
2714                                 init_waitqueue_head(&tiocmget->waitq);
2715                                 tiocmget->endp = hso_get_ep(
2716                                         interface,
2717                                         USB_ENDPOINT_XFER_INT,
2718                                         USB_DIR_IN);
2719                         } else
2720                                 hso_free_tiomget(serial);
2721                 }
2722         }
2723         else
2724                 num_urbs = 1;
2725
2726         if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2727                                      BULK_URB_TX_SIZE))
2728                 goto exit;
2729
2730         serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2731                                      USB_DIR_IN);
2732         if (!serial->in_endp) {
2733                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2734                 goto exit2;
2735         }
2736
2737         if (!
2738             (serial->out_endp =
2739              hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2740                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2741                 goto exit2;
2742         }
2743
2744         serial->write_data = hso_std_serial_write_data;
2745
2746         /* and record this serial */
2747         set_serial_by_index(serial->minor, serial);
2748
2749         /* setup the proc dirs and files if needed */
2750         hso_log_port(hso_dev);
2751
2752         /* done, return it */
2753         return hso_dev;
2754
2755 exit2:
2756         hso_serial_common_free(serial);
2757 exit:
2758         hso_free_tiomget(serial);
2759         kfree(serial);
2760         kfree(hso_dev);
2761         return NULL;
2762 }
2763
2764 /* Creates a multiplexed AT channel */
2765 static
2766 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2767                                                 int port,
2768                                                 struct hso_shared_int *mux)
2769 {
2770         struct hso_device *hso_dev;
2771         struct hso_serial *serial;
2772         int port_spec;
2773
2774         port_spec = HSO_INTF_MUX;
2775         port_spec &= ~HSO_PORT_MASK;
2776
2777         port_spec |= hso_mux_to_port(port);
2778         if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2779                 return NULL;
2780
2781         hso_dev = hso_create_device(interface, port_spec);
2782         if (!hso_dev)
2783                 return NULL;
2784
2785         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2786         if (!serial)
2787                 goto exit;
2788
2789         hso_dev->port_data.dev_serial = serial;
2790         serial->parent = hso_dev;
2791
2792         if (hso_serial_common_create
2793             (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2794                 goto exit;
2795
2796         serial->tx_data_length--;
2797         serial->write_data = hso_mux_serial_write_data;
2798
2799         serial->shared_int = mux;
2800         mutex_lock(&serial->shared_int->shared_int_lock);
2801         serial->shared_int->ref_count++;
2802         mutex_unlock(&serial->shared_int->shared_int_lock);
2803
2804         /* and record this serial */
2805         set_serial_by_index(serial->minor, serial);
2806
2807         /* setup the proc dirs and files if needed */
2808         hso_log_port(hso_dev);
2809
2810         /* done, return it */
2811         return hso_dev;
2812
2813 exit:
2814         if (serial) {
2815                 tty_unregister_device(tty_drv, serial->minor);
2816                 kfree(serial);
2817         }
2818         if (hso_dev)
2819                 kfree(hso_dev);
2820         return NULL;
2821
2822 }
2823
2824 static void hso_free_shared_int(struct hso_shared_int *mux)
2825 {
2826         usb_free_urb(mux->shared_intr_urb);
2827         kfree(mux->shared_intr_buf);
2828         mutex_unlock(&mux->shared_int_lock);
2829         kfree(mux);
2830 }
2831
2832 static
2833 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2834 {
2835         struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2836
2837         if (!mux)
2838                 return NULL;
2839
2840         mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2841                                     USB_DIR_IN);
2842         if (!mux->intr_endp) {
2843                 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2844                 goto exit;
2845         }
2846
2847         mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2848         if (!mux->shared_intr_urb) {
2849                 dev_err(&interface->dev, "Could not allocate intr urb?\n");
2850                 goto exit;
2851         }
2852         mux->shared_intr_buf =
2853                 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2854                         GFP_KERNEL);
2855         if (!mux->shared_intr_buf) {
2856                 dev_err(&interface->dev, "Could not allocate intr buf?\n");
2857                 goto exit;
2858         }
2859
2860         mutex_init(&mux->shared_int_lock);
2861
2862         return mux;
2863
2864 exit:
2865         kfree(mux->shared_intr_buf);
2866         usb_free_urb(mux->shared_intr_urb);
2867         kfree(mux);
2868         return NULL;
2869 }
2870
2871 /* Gets the port spec for a certain interface */
2872 static int hso_get_config_data(struct usb_interface *interface)
2873 {
2874         struct usb_device *usbdev = interface_to_usbdev(interface);
2875         u8 config_data[17];
2876         u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2877         s32 result;
2878
2879         if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2880                             0x86, 0xC0, 0, 0, config_data, 17,
2881                             USB_CTRL_SET_TIMEOUT) != 0x11) {
2882                 return -EIO;
2883         }
2884
2885         switch (config_data[if_num]) {
2886         case 0x0:
2887                 result = 0;
2888                 break;
2889         case 0x1:
2890                 result = HSO_PORT_DIAG;
2891                 break;
2892         case 0x2:
2893                 result = HSO_PORT_GPS;
2894                 break;
2895         case 0x3:
2896                 result = HSO_PORT_GPS_CONTROL;
2897                 break;
2898         case 0x4:
2899                 result = HSO_PORT_APP;
2900                 break;
2901         case 0x5:
2902                 result = HSO_PORT_APP2;
2903                 break;
2904         case 0x6:
2905                 result = HSO_PORT_CONTROL;
2906                 break;
2907         case 0x7:
2908                 result = HSO_PORT_NETWORK;
2909                 break;
2910         case 0x8:
2911                 result = HSO_PORT_MODEM;
2912                 break;
2913         case 0x9:
2914                 result = HSO_PORT_MSD;
2915                 break;
2916         case 0xa:
2917                 result = HSO_PORT_PCSC;
2918                 break;
2919         case 0xb:
2920                 result = HSO_PORT_VOICE;
2921                 break;
2922         default:
2923                 result = 0;
2924         }
2925
2926         if (result)
2927                 result |= HSO_INTF_BULK;
2928
2929         if (config_data[16] & 0x1)
2930                 result |= HSO_INFO_CRC_BUG;
2931
2932         return result;
2933 }
2934
2935 /* called once for each interface upon device insertion */
2936 static int hso_probe(struct usb_interface *interface,
2937                      const struct usb_device_id *id)
2938 {
2939         int mux, i, if_num, port_spec;
2940         unsigned char port_mask;
2941         struct hso_device *hso_dev = NULL;
2942         struct hso_shared_int *shared_int;
2943         struct hso_device *tmp_dev = NULL;
2944
2945         if_num = interface->altsetting->desc.bInterfaceNumber;
2946
2947         /* Get the interface/port specification from either driver_info or from
2948          * the device itself */
2949         if (id->driver_info)
2950                 port_spec = ((u32 *)(id->driver_info))[if_num];
2951         else
2952                 port_spec = hso_get_config_data(interface);
2953
2954         if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2955                 dev_err(&interface->dev, "Not our interface\n");
2956                 return -ENODEV;
2957         }
2958         /* Check if we need to switch to alt interfaces prior to port
2959          * configuration */
2960         if (interface->num_altsetting > 1)
2961                 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2962         interface->needs_remote_wakeup = 1;
2963
2964         /* Allocate new hso device(s) */
2965         switch (port_spec & HSO_INTF_MASK) {
2966         case HSO_INTF_MUX:
2967                 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2968                         /* Create the network device */
2969                         if (!disable_net) {
2970                                 hso_dev = hso_create_net_device(interface,
2971                                                                 port_spec);
2972                                 if (!hso_dev)
2973                                         goto exit;
2974                                 tmp_dev = hso_dev;
2975                         }
2976                 }
2977
2978                 if (hso_get_mux_ports(interface, &port_mask))
2979                         /* TODO: de-allocate everything */
2980                         goto exit;
2981
2982                 shared_int = hso_create_shared_int(interface);
2983                 if (!shared_int)
2984                         goto exit;
2985
2986                 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2987                         if (port_mask & i) {
2988                                 hso_dev = hso_create_mux_serial_device(
2989                                                 interface, i, shared_int);
2990                                 if (!hso_dev)
2991                                         goto exit;
2992                         }
2993                 }
2994
2995                 if (tmp_dev)
2996                         hso_dev = tmp_dev;
2997                 break;
2998
2999         case HSO_INTF_BULK:
3000                 /* It's a regular bulk interface */
3001                 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) &&
3002                     !disable_net)
3003                         hso_dev = hso_create_net_device(interface, port_spec);
3004                 else
3005                         hso_dev =
3006                             hso_create_bulk_serial_device(interface, port_spec);
3007                 if (!hso_dev)
3008                         goto exit;
3009                 break;
3010         default:
3011                 goto exit;
3012         }
3013
3014         /* save our data pointer in this device */
3015         usb_set_intfdata(interface, hso_dev);
3016
3017         /* done */
3018         return 0;
3019 exit:
3020         hso_free_interface(interface);
3021         return -ENODEV;
3022 }
3023
3024 /* device removed, cleaning up */
3025 static void hso_disconnect(struct usb_interface *interface)
3026 {
3027         hso_free_interface(interface);
3028
3029         /* remove reference of our private data */
3030         usb_set_intfdata(interface, NULL);
3031 }
3032
3033 static void async_get_intf(struct work_struct *data)
3034 {
3035         struct hso_device *hso_dev =
3036             container_of(data, struct hso_device, async_get_intf);
3037         usb_autopm_get_interface(hso_dev->interface);
3038 }
3039
3040 static void async_put_intf(struct work_struct *data)
3041 {
3042         struct hso_device *hso_dev =
3043             container_of(data, struct hso_device, async_put_intf);
3044         usb_autopm_put_interface(hso_dev->interface);
3045 }
3046
3047 static int hso_get_activity(struct hso_device *hso_dev)
3048 {
3049         if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3050                 if (!hso_dev->is_active) {
3051                         hso_dev->is_active = 1;
3052                         schedule_work(&hso_dev->async_get_intf);
3053                 }
3054         }
3055
3056         if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3057                 return -EAGAIN;
3058
3059         usb_mark_last_busy(hso_dev->usb);
3060
3061         return 0;
3062 }
3063
3064 static int hso_put_activity(struct hso_device *hso_dev)
3065 {
3066         if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3067                 if (hso_dev->is_active) {
3068                         hso_dev->is_active = 0;
3069                         schedule_work(&hso_dev->async_put_intf);
3070                         return -EAGAIN;
3071                 }
3072         }
3073         hso_dev->is_active = 0;
3074         return 0;
3075 }
3076
3077 /* called by kernel when we need to suspend device */
3078 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3079 {
3080         int i, result;
3081
3082         /* Stop all serial ports */
3083         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3084                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3085                         result = hso_stop_serial_device(serial_table[i]);
3086                         if (result)
3087                                 goto out;
3088                 }
3089         }
3090
3091         /* Stop all network ports */
3092         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3093                 if (network_table[i] &&
3094                     (network_table[i]->interface == iface)) {
3095                         result = hso_stop_net_device(network_table[i]);
3096                         if (result)
3097                                 goto out;
3098                 }
3099         }
3100
3101 out:
3102         return 0;
3103 }
3104
3105 /* called by kernel when we need to resume device */
3106 static int hso_resume(struct usb_interface *iface)
3107 {
3108         int i, result = 0;
3109         struct hso_net *hso_net;
3110
3111         /* Start all serial ports */
3112         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3113                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3114                         if (dev2ser(serial_table[i])->open_count) {
3115                                 result =
3116                                     hso_start_serial_device(serial_table[i], GFP_NOIO);
3117                                 hso_kick_transmit(dev2ser(serial_table[i]));
3118                                 if (result)
3119                                         goto out;
3120                         }
3121                 }
3122         }
3123
3124         /* Start all network ports */
3125         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3126                 if (network_table[i] &&
3127                     (network_table[i]->interface == iface)) {
3128                         hso_net = dev2net(network_table[i]);
3129                         if (hso_net->flags & IFF_UP) {
3130                                 /* First transmit any lingering data,
3131                                    then restart the device. */
3132                                 if (hso_net->skb_tx_buf) {
3133                                         dev_dbg(&iface->dev,
3134                                                 "Transmitting"
3135                                                 " lingering data\n");
3136                                         hso_net_start_xmit(hso_net->skb_tx_buf,
3137                                                            hso_net->net);
3138                                         hso_net->skb_tx_buf = NULL;
3139                                 }
3140                                 result = hso_start_net_device(network_table[i]);
3141                                 if (result)
3142                                         goto out;
3143                         }
3144                 }
3145         }
3146
3147 out:
3148         return result;
3149 }
3150
3151 static void reset_device(struct work_struct *data)
3152 {
3153         struct hso_device *hso_dev =
3154             container_of(data, struct hso_device, reset_device);
3155         struct usb_device *usb = hso_dev->usb;
3156         int result;
3157
3158         if (hso_dev->usb_gone) {
3159                 D1("No reset during disconnect\n");
3160         } else {
3161                 result = usb_lock_device_for_reset(usb, hso_dev->interface);
3162                 if (result < 0)
3163                         D1("unable to lock device for reset: %d\n", result);
3164                 else {
3165                         usb_reset_device(usb);
3166                         usb_unlock_device(usb);
3167                 }
3168         }
3169 }
3170
3171 static void hso_serial_ref_free(struct kref *ref)
3172 {
3173         struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3174
3175         hso_free_serial_device(hso_dev);
3176 }
3177
3178 static void hso_free_interface(struct usb_interface *interface)
3179 {
3180         struct hso_serial *hso_dev;
3181         struct tty_struct *tty;
3182         int i;
3183
3184         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3185                 if (serial_table[i] &&
3186                     (serial_table[i]->interface == interface)) {
3187                         hso_dev = dev2ser(serial_table[i]);
3188                         spin_lock_irq(&hso_dev->serial_lock);
3189                         tty = tty_kref_get(hso_dev->tty);
3190                         spin_unlock_irq(&hso_dev->serial_lock);
3191                         if (tty)
3192                                 tty_hangup(tty);
3193                         mutex_lock(&hso_dev->parent->mutex);
3194                         tty_kref_put(tty);
3195                         hso_dev->parent->usb_gone = 1;
3196                         mutex_unlock(&hso_dev->parent->mutex);
3197                         kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3198                 }
3199         }
3200
3201         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3202                 if (network_table[i] &&
3203                     (network_table[i]->interface == interface)) {
3204                         struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3205                         /* hso_stop_net_device doesn't stop the net queue since
3206                          * traffic needs to start it again when suspended */
3207                         netif_stop_queue(dev2net(network_table[i])->net);
3208                         hso_stop_net_device(network_table[i]);
3209                         cancel_work_sync(&network_table[i]->async_put_intf);
3210                         cancel_work_sync(&network_table[i]->async_get_intf);
3211                         if (rfk) {
3212                                 rfkill_unregister(rfk);
3213                                 rfkill_destroy(rfk);
3214                         }
3215                         hso_free_net_device(network_table[i]);
3216                 }
3217         }
3218 }
3219
3220 /* Helper functions */
3221
3222 /* Get the endpoint ! */
3223 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3224                                                   int type, int dir)
3225 {
3226         int i;
3227         struct usb_host_interface *iface = intf->cur_altsetting;
3228         struct usb_endpoint_descriptor *endp;
3229
3230         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3231                 endp = &iface->endpoint[i].desc;
3232                 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3233                     (usb_endpoint_type(endp) == type))
3234                         return endp;
3235         }
3236
3237         return NULL;
3238 }
3239
3240 /* Get the byte that describes which ports are enabled */
3241 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3242 {
3243         int i;
3244         struct usb_host_interface *iface = intf->cur_altsetting;
3245
3246         if (iface->extralen == 3) {
3247                 *ports = iface->extra[2];
3248                 return 0;
3249         }
3250
3251         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3252                 if (iface->endpoint[i].extralen == 3) {
3253                         *ports = iface->endpoint[i].extra[2];
3254                         return 0;
3255                 }
3256         }
3257
3258         return -1;
3259 }
3260
3261 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3262 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3263                                    struct usb_device *usb, gfp_t gfp)
3264 {
3265         int result;
3266
3267         usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3268                          usb_rcvintpipe(usb,
3269                                 shared_int->intr_endp->bEndpointAddress & 0x7F),
3270                          shared_int->shared_intr_buf,
3271                          1,
3272                          intr_callback, shared_int,
3273                          shared_int->intr_endp->bInterval);
3274
3275         result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3276         if (result)
3277                 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3278                         result);
3279
3280         return result;
3281 }
3282
3283 /* operations setup of the serial interface */
3284 static const struct tty_operations hso_serial_ops = {
3285         .open = hso_serial_open,
3286         .close = hso_serial_close,
3287         .write = hso_serial_write,
3288         .write_room = hso_serial_write_room,
3289         .ioctl = hso_serial_ioctl,
3290         .set_termios = hso_serial_set_termios,
3291         .chars_in_buffer = hso_serial_chars_in_buffer,
3292         .tiocmget = hso_serial_tiocmget,
3293         .tiocmset = hso_serial_tiocmset,
3294         .unthrottle = hso_unthrottle
3295 };
3296
3297 static struct usb_driver hso_driver = {
3298         .name = driver_name,
3299         .probe = hso_probe,
3300         .disconnect = hso_disconnect,
3301         .id_table = hso_ids,
3302         .suspend = hso_suspend,
3303         .resume = hso_resume,
3304         .reset_resume = hso_resume,
3305         .supports_autosuspend = 1,
3306 };
3307
3308 static int __init hso_init(void)
3309 {
3310         int i;
3311         int result;
3312
3313         /* put it in the log */
3314         printk(KERN_INFO "hso: %s\n", version);
3315
3316         /* Initialise the serial table semaphore and table */
3317         spin_lock_init(&serial_table_lock);
3318         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3319                 serial_table[i] = NULL;
3320
3321         /* allocate our driver using the proper amount of supported minors */
3322         tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3323         if (!tty_drv)
3324                 return -ENOMEM;
3325
3326         /* fill in all needed values */
3327         tty_drv->magic = TTY_DRIVER_MAGIC;
3328         tty_drv->owner = THIS_MODULE;
3329         tty_drv->driver_name = driver_name;
3330         tty_drv->name = tty_filename;
3331
3332         /* if major number is provided as parameter, use that one */
3333         if (tty_major)
3334                 tty_drv->major = tty_major;
3335
3336         tty_drv->minor_start = 0;
3337         tty_drv->num = HSO_SERIAL_TTY_MINORS;
3338         tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3339         tty_drv->subtype = SERIAL_TYPE_NORMAL;
3340         tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3341         tty_drv->init_termios = tty_std_termios;
3342         hso_init_termios(&tty_drv->init_termios);
3343         tty_set_operations(tty_drv, &hso_serial_ops);
3344
3345         /* register the tty driver */
3346         result = tty_register_driver(tty_drv);
3347         if (result) {
3348                 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3349                         __func__, result);
3350                 return result;
3351         }
3352
3353         /* register this module as an usb driver */
3354         result = usb_register(&hso_driver);
3355         if (result) {
3356                 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3357                         result);
3358                 /* cleanup serial interface */
3359                 tty_unregister_driver(tty_drv);
3360                 return result;
3361         }
3362
3363         /* done */
3364         return 0;
3365 }
3366
3367 static void __exit hso_exit(void)
3368 {
3369         printk(KERN_INFO "hso: unloaded\n");
3370
3371         tty_unregister_driver(tty_drv);
3372         /* deregister the usb driver */
3373         usb_deregister(&hso_driver);
3374 }
3375
3376 /* Module definitions */
3377 module_init(hso_init);
3378 module_exit(hso_exit);
3379
3380 MODULE_AUTHOR(MOD_AUTHOR);
3381 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3382 MODULE_LICENSE(MOD_LICENSE);
3383
3384 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3385 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3386 module_param(debug, int, S_IRUGO | S_IWUSR);
3387
3388 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3389 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3390 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3391
3392 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3393 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3394 module_param(disable_net, int, S_IRUGO | S_IWUSR);